Mercurial > flash_v2
changeset 1624:877b7c3bf2b8
Initial import of lwIP TCP/IP stack
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new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/ChangeLog @@ -0,0 +1,131 @@ +2004-05-04 Jani Monoses <jani@iv.ro> + + * cdl/lwip_net.cdl + * src/api/err.c + * src/api/tcpip.c + * src/api/sockets.c + * src/api/api_lib.c + * src/api/api_msg.c + * src/core/tcp_in.c + * src/core/ipv4/ip.c + * src/core/ipv4/ip_addr.c + * src/core/ipv4/ip_frag.c + * src/core/ipv4/icmp.c + * src/core/tcp_out.c + * src/core/mem.c + * src/core/raw.c + * src/core/tcp.c + * src/core/sys.c + * src/core/udp.c + * src/core/stats.c + * src/core/dhcp.c + * src/core/netif.c + * src/core/inet.c + * src/core/memp.c + * src/core/pbuf.c + * src/ecos/sio.c + * src/ecos/sys_arch.c + * src/ecos/init.c + * src/netif/ppp/vj.c + * src/netif/ppp/vj.h + * src/netif/ppp/randm.c + * src/netif/ppp/randm.h + * src/netif/ppp/vjbsdhdr.h + * src/netif/ppp/fsm.c + * src/netif/ppp/fsm.h + * src/netif/ppp/lcp.c + * src/netif/ppp/lcp.h + * src/netif/ppp/md5.c + * src/netif/ppp/md5.h + * src/netif/ppp/pap.c + * src/netif/ppp/pap.h + * src/netif/ppp/ppp.c + * src/netif/ppp/ppp.h + * src/netif/ppp/magic.c + * src/netif/ppp/magic.h + * src/netif/ppp/pppdebug.h + * src/netif/ppp/auth.c + * src/netif/ppp/auth.h + * src/netif/ppp/chap.c + * src/netif/ppp/chap.h + * src/netif/ppp/ipcp.c + * src/netif/ppp/ipcp.h + * src/netif/ppp/chpms.c + * src/netif/ppp/chpms.h + * src/netif/etharp.c + * src/netif/slipif.c + * src/netif/loopif.c + * tests/tcpecho.c + * tests/udpecho.c + * tests/nc_test_framework.h + * tests/nc_test_slave.c + * tests/httpd.c + * tests/sys_timeout.c + * tests/socket.c + * include/arch/cc.h + * include/arch/sys_arch.h + * include/arch/perf.h + * include/lwip/ip.h + * include/lwip/debug.h + * include/lwip/ip_addr.h + * include/lwip/api.h + * include/lwip/def.h + * include/lwip/err.h + * include/lwip/mem.h + * include/lwip/opt.h + * include/lwip/ip_frag.h + * include/lwip/raw.h + * include/lwip/sio.h + * include/lwip/tcp.h + * include/lwip/sys.h + * include/lwip/udp.h + * include/lwip/tcpip.h + * include/lwip/stats.h + * include/lwip/arch.h + * include/lwip/dhcp.h + * include/lwip/netif.h + * include/lwip/icmp.h + * include/lwip/inet.h + * include/lwip/memp.h + * include/lwip/pbuf.h + * include/lwip/snmp.h + * include/lwip/sockets.h + * include/lwip/api_msg.h + * include/netif/etharp.h + * include/netif/slipif.h + * include/netif/loopif.h + * include/network.h + * include/lwipopts.h : Initial import of the lwIP TCP/IP stack. + +//=========================================================================== +//####ECOSGPLCOPYRIGHTBEGIN#### +// ------------------------------------------- +// This file is part of eCos, the Embedded Configurable Operating System. +// Copyright (C) 2004 eCosCentric +// +// eCos is free software; you can redistribute it and/or modify it under +// the terms of the GNU General Public License as published by the Free +// Software Foundation; either version 2 or (at your option) any later version. +// +// eCos is distributed in the hope that it will be useful, but WITHOUT ANY +// WARRANTY; without even the implied warranty of MERCHANTABILITY or +// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +// for more details. +// +// You should have received a copy of the GNU General Public License along +// with eCos; if not, write to the Free Software Foundation, Inc., +// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. +// +// As a special exception, if other files instantiate templates or use macros +// or inline functions from this file, or you compile this file and link it +// with other works to produce a work based on this file, this file does not +// by itself cause the resulting work to be covered by the GNU General Public +// License. However the source code for this file must still be made available +// in accordance with section (3) of the GNU General Public License. +// +// This exception does not invalidate any other reasons why a work based on +// this file might be covered by the GNU General Public License. +// +// ------------------------------------------- +//####ECOSGPLCOPYRIGHTEND#### +//===========================================================================
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/cdl/lwip_net.cdl @@ -0,0 +1,679 @@ +#==================================================================== +# +# lwip_net.cdl +# +# lwIP network stack configuration data +# +# ==================================================================== +#####ECOSGPLCOPYRIGHTBEGIN#### +## ------------------------------------------- +## This file is part of eCos, the Embedded Configurable Operating System. +## Copyright (C) 2004 eCosCentric +## +## eCos is free software; you can redistribute it and/or modify it under +## the terms of the GNU General Public License as published by the Free +## Software Foundation; either version 2 or (at your option) any later version. +## +## eCos is distributed in the hope that it will be useful, but WITHOUT ANY +## WARRANTY; without even the implied warranty of MERCHANTABILITY or +## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +## for more details. +## +## You should have received a copy of the GNU General Public License along +## with eCos; if not, write to the Free Software Foundation, Inc., +## 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. +## +## As a special exception, if other files instantiate templates or use macros +## or inline functions from this file, or you compile this file and link it +## with other works to produce a work based on this file, this file does not +## by itself cause the resulting work to be covered by the GNU General Public +## License. However the source code for this file must still be made available +## in accordance with section (3) of the GNU General Public License. +## +## This exception does not invalidate any other reasons why a work based on +## this file might be covered by the GNU General Public License. +## +## ------------------------------------------- +#####ECOSGPLCOPYRIGHTEND#### +# ==================================================================== +######DESCRIPTIONBEGIN#### +# +# Author(s): cris@iv.ro, jani@iv.ro +# Original data: jani@iv.ro +# Contributors: +# Date: 2002-06-21 +# +#####DESCRIPTIONEND#### +# +# ==================================================================== + +cdl_package CYGPKG_NET_LWIP { + display "lwIP" + description "Lightweight TCP/IP stack" + requires {(CYGPKG_LWIP_ETH == 1) || (CYGPKG_LWIP_SLIP == 1) || (CYGPKG_LWIP_PPP == 1)} + + compile core/mem.c \ + core/memp.c \ + core/netif.c \ + core/pbuf.c \ + core/stats.c \ + core/sys.c \ + core/tcp.c \ + core/tcp_in.c \ + core/tcp_out.c \ + core/inet.c \ + core/ipv4/icmp.c \ + core/ipv4/ip.c \ + core/ipv4/ip_addr.c \ + core/ipv4/ip_frag.c \ + api/api_lib.c \ + api/api_msg.c \ + api/tcpip.c \ + api/err.c \ + api/sockets.c \ + ecos/sys_arch.c \ + ecos/init.c + + + cdl_component CYGPKG_LWIP_STATS { + display "Turn ON/OFF statistics" + flavor bool + default_value 0 + description " + Check this box to turn ON statistics options for lwIP." + } + + cdl_component CYGPKG_LWIP_DEBUG { + display "Turn ON/OFF debug options" + flavor bool + default_value 0 + description " + Check this box to turn ON debug options for lwIP." + + cdl_option CYGPKG_LWIP_DEBUG_TCP { + display "Control TCP debug" + flavor bool + default_value 0 + description " + Generic TCP debug switch." + + } + + } + + cdl_component CYGPKG_LWIP_ASSERTS { + display "Turn ON/OFF assertions" + flavor bool + default_value 0 + description " + Check this box to turn ON assertions for lwIP." + } + + cdl_component CYGPKG_LWIP_IPV4_CONF { + display "IPV4 netconf" + flavor none + no_define + description " + See suboptions to define gateway IP, local IP and netmask." + + cdl_option CYGPKG_LWIP_SERV_ADDR { + display "Gateway IP" + flavor data + default_value {"192,168,1,1"} + description " + Gateway's IP address." + + } + cdl_option CYGPKG_LWIP_MY_ADDR { + display "My IP" + flavor data + default_value {"192,168,1,222"} + description " + The IP address for this device." + + } + cdl_option CYGPKG_LWIP_NETMASK { + display "Netmask" + flavor data + default_value {"255,255,255,0"} + description " + Netmask of the local network." + + } + } + + cdl_component CYGPKG_LWIP_MEM_OPTIONS { + display "Memory options" + flavor none + no_define + description " + Tunables for various aspects of memory usage throughout the stack." + + + + cdl_option CYGPKG_LWIP_MEM_ALIGNMENT { + display "Memory alignment" + flavor data + default_value 4 + description " + MEM_ALIGNMENT: should be set to the alignment of the CPU for which + lwIP is compiled. 4 byte alignment -> define MEM_ALIGNMENT to 4, + 2 byte alignment -> define MEM_ALIGNMENT to 2." + } + cdl_option CYGPKG_LWIP_MEM_SIZE { + display "Memory size" + flavor data + default_value 4000 + description " + MEM_SIZE: the size of the heap memory. If the application will send + a lot of data that needs to be copied, this should be set high." + + } + cdl_option CYGPKG_LWIP_MEMP_NUM_PBUF { + display "Number of memp struct pbufs" + flavor data + default_value 8 + description " + MEMP_NUM_PBUF: the number of memp struct pbufs. If the application + sends a lot of data out of ROM (or other static memory), this + should be set high." + + } + cdl_option CYGPKG_LWIP_MEMP_NUM_UDP_PCB { + display "Simultaneous UDP control blocks " + flavor data + default_value 4 + description " + MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One + per active UDP 'connection'." + + } + cdl_option CYGPKG_LWIP_MEMP_NUM_TCP_PCB { + display "Simultaneous active TCP connections " + flavor data + default_value 5 + description " + MEMP_NUM_TCP_PCB: the number of simulatenously active TCP + connections." + + } + cdl_option CYGPKG_LWIP_MEMP_NUM_TCP_PCB_LISTEN { + display "Listening TCP connections" + flavor data + default_value 8 + description " + MEMP_NUM_TCP_PCB_LISTEN: the number of listening TCP + connections." + + } + cdl_option CYGPKG_LWIP_MEMP_NUM_TCP_SEG { + display "Simultaneous TCP segments queued" + flavor data + default_value 8 + description " + MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP + segments." + + } + cdl_option CYGPKG_LWIP_MEMP_NUM_SYS_TIMEOUT { + display "Simultaneous active timeouts" + flavor data + default_value 3 + description " + MEMP_NUM_SYS_TIMEOUT: the number of simulateously active + timeouts." + + } + cdl_component CYGPKG_LWIP_CYGPKG_LWIP_MEM_SEQ_API { + display "Sequential API settings" + flavor none + no_define + description " + The following four are used only with the sequential API and can be + set to 0 if the application only will use the raw API." + + + cdl_option CYGPKG_LWIP_MEMP_NUM_NETBUF { + display "Struct netbufs" + flavor data + default_value 2 + description " + MEMP_NUM_NETBUF: the number of struct netbufs." + + } + cdl_option CYGPKG_LWIP_MEMP_NUM_NETCONN { + display "Struct netconns" + flavor data + default_value 4 + description " + MEMP_NUM_NETCONN: the number of struct netconns." + + } + cdl_option CYGPKG_LWIP_MEMP_NUM_APIMSG { + display "Struct api_msgs" + flavor data + default_value 8 + description " + MEMP_NUM_APIMSG: the number of struct api_msg, used for + communication between the TCP/IP stack and the sequential + programs." + + } + cdl_option CYGPKG_LWIP_MEMP_NUM_TCPIP_MSG { + display "Struct tcpip_msgs" + flavor data + default_value 8 + description " + MEMP_NUM_TCPIPMSG: the number of struct tcpip_msg, which is used + for sequential API communication and incoming packets. Used in + src/api/tcpip.c." + + } + } + + } + + cdl_component CYGPKG_LWIP_PBUF_OPTIONS { + display "PBUF" + flavor none + no_define + description " + Packet buffer related tunings." + + + cdl_option CYGPKG_LWIP_PBUF_POOL_SIZE { + display "PBUF pool size" + flavor data + default_value 60 + description " + PBUF_POOL_SIZE: the number of buffers in the pbuf pool." + + } + + cdl_option CYGPKG_LWIP_PBUF_POOL_BUFSIZE { + display "PBUF buffer size" + flavor data + default_value 1024 + description " + PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool." + + } + cdl_option CYGPKG_LWIP_PBUF_LINK_HLEN { + display "Allocation for a link level header" + flavor data + calculated {CYGPKG_LWIP_SLIP || CYGPKG_LWIP_PPP ? 0 : 16} + description " + PBUF_LINK_HLEN: the number of bytes that should be allocated for a + link level header." + } + } + + cdl_component CYGPKG_LWIP_TCP_OPTIONS { + display "TCP" + flavor none + no_define + description " + Tune the TCP protocol details" + + cdl_option CYGPKG_LWIP_TCP { + display "Activate TCP" + flavor bool + default_value 1 + description "" + + } + + cdl_option CYGPKG_LWIP_TCPIP_THREAD_PRIORITY { + display "tcpip thread priority" + flavor data + default_value 7 + description "Pririty of the lwIP network thread.This thread handles all API messages and + network packets." + } + + cdl_option CYGPKG_LWIP_TCP_TTL { + display "Time To Live" + flavor data + default_value 255 + description "" + + } + cdl_option CYGPKG_LWIP_TCP_QUEUE_OOSEQ { + display "Queue segments" + flavor bool + default_value 1 + description " + Controls if TCP should queue segments that arrive out of + order. Define to 0 if your device is low on memory." + + } + cdl_option CYGPKG_LWIP_TCP_MSS { + display "Maximum segment size" + flavor data + default_value 2048 + description " + TCP Maximum segment size." + } + cdl_option CYGPKG_LWIP_TCP_SND_BUF { + display "Sender buffer space" + flavor data + default_value 2048 + description " + TCP sender buffer space (bytes)." + + } + cdl_option CYGPKG_LWIP_TCP_SND_QUEUELEN { + display "Sender pbufs" + flavor data + calculated "4 * CYGPKG_LWIP_TCP_SND_BUF/CYGPKG_LWIP_TCP_MSS" + description " + TCP sender buffer space (pbufs). This must be at least = 2 * + TCP_SND_BUF/TCP_MSS for things to work." + + } + cdl_option CYGPKG_LWIP_TCP_WND { + display "Receive window" + flavor data + default_value 4096 + description " + TCP receive window." + + } + cdl_option CYGPKG_LWIP_TCP_MAXRTX { + display "Segment retransmissions" + flavor data + default_value 12 + description " + Maximum number of retransmissions of data segments." + + } + cdl_option CYGPKG_LWIP_TCP_SYNMAXRTX { + display "Syn retransmissions" + flavor data + default_value 4 + description " + Maximum number of retransmissions of SYN segments." + } + } + + cdl_component CYGPKG_LWIP_ARP_OPTIONS { + display "ARP" + flavor none + no_define + + cdl_option CYGPKG_LWIP_ARP_TABLE_SIZE { + display "ARP table size" + flavor data + default_value 10 + description "" + + } + } + + cdl_component CYGPKG_LWIP_IP { + display "IP" + flavor none + no_define + + cdl_option CYGPKG_LWIP_IP_FORWARD { + display "IP forwarding" + flavor bool + default_value 1 + description " + Define IP_FORWARD to 1 if you wish to have the ability to forward + IP packets across network interfaces. If you are going to run lwIP + on a device with only one network interface, define this to 0." + + } + cdl_option CYGPKG_LWIP_IP_OPTIONS { + display "Allow IP options" + flavor bool + default_value 1 + description " + If defined to 1, IP options are allowed (but not parsed). If + defined to 0, all packets with IP options are dropped." + + } + + cdl_option CYGPKG_LWIP_IP_FRAG { + display "Support IP fragmentation" + flavor bool + default_value 1 + description " + " + } + + cdl_option CYGPKG_LWIP_IP_REASS { + display "Support IP reassembly" + flavor bool + default_value 1 + description " + " + } + + } + + cdl_component CYGPKG_LWIP_ICMP_OPTIONS { + display "ICMP" + flavor none + no_define + + cdl_option CYGPKG_LWIP_ICMP_TTL { + display "ICMP Time To Live" + flavor data + default_value 255 + description "" + } + } + + cdl_component CYGPKG_LWIP_DHCP_OPTIONS { + display "DHCP" + flavor none + no_define + + + cdl_option CYGPKG_LWIP_DHCP { + display "Activate DHCP" + flavor bool + default_value 0 + description " + Define LWIP_DHCP to 1 if you want DHCP configuration of + interfaces." + compile core/dhcp.c + } + + + cdl_option CYGPKG_LWIP_DHCP_DOES_ARP_CHECK { + display "Check offered address" + flavor bool + default_value 0 + description " + 1 if you want to do an ARP check on the offered address + (recommended)." + } + } + + cdl_component CYGPKG_LWIP_LOOPIF { + display "Support loop interface (127.0.0.1)" + flavor bool + default_value 1 + compile netif/loopif.c + } + + cdl_component CYGPKG_LWIP_ETH { + display "Ethernet support" + flavor bool + requires CYGPKG_IO_ETH_DRIVERS + default_value 1 + description "Ethernet support" + compile netif/etharp.c + + cdl_option CYGPKG_LWIP_ETH_THREAD_PRIORITY { + display "ethernet input thread priority" + flavor data + default_value 6 + description "Priority of the thernet input thread" + } + + } + + cdl_component CYGPKG_LWIP_SLIP { + display "SLIP" + flavor bool + requires CYGPKG_IO_SERIAL_DEVICES + default_value 0 + description "IP over Serial Line" + compile netif/slipif.c ecos/sio.c + + cdl_option CYGPKG_LWIP_SLIPIF_THREAD_PRIORITY { + display "SLIP thread priority" + flavor data + default_value 8 + description "Priority of the SLIP input thread" + } + + cdl_option CYGPKG_LWIP_SLIP_DEV { + display "Serial device" + flavor data + default_value {"\"/dev/ser0\""} + description " + Which serial port to use SLIP on." + } + } + + cdl_component CYGPKG_LWIP_PPP { + display "PPP" + flavor bool + requires CYGPKG_IO_SERIAL_DEVICES + default_value 0 + description "The Point-to-Point Protocol" + compile netif/ppp/ppp.c \ + netif/ppp/auth.c \ + netif/ppp/chpms.c \ + netif/ppp/fsm.c \ + netif/ppp/ipcp.c \ + netif/ppp/lcp.c \ + netif/ppp/magic.c \ + netif/ppp/md5.c \ + netif/ppp/randm.c \ + netif/ppp/vj.c \ + ecos/sio.c + + + cdl_option CYGPKG_LWIP_PPP_PAP_AUTH { + display "Support PAP authentication" + flavor bool + default_value 1 + compile netif/ppp/pap.c + } + + cdl_option CYGPKG_LWIP_PPP_CHAP_AUTH { + display "Support CHAP authentication" + flavor bool + default_value 1 + compile netif/ppp/chap.c + } + + cdl_option CYGPKG_LWIP_PPP_DEV { + display "Serial device for PPP" + flavor data + default_value {"\"/dev/ser0\""} + description " + Which serial port to use PPP on." + } + + cdl_option CYGPKG_LWIP_PPP_THREAD_PRIORITY { + display "PPP main thread priority" + flavor data + default_value 8 + description "Priority of the PPP input thread" + } + } + + cdl_component CYGPKG_LWIP_UDP_OPTIONS { + display "UDP" + flavor none + no_define + + cdl_option CYGPKG_LWIP_UDP { + display "Activate UDP" + flavor bool + default_value 1 + description "" + compile core/udp.c + } + + cdl_option CYGPKG_LWIP_UDP_TTL { + display "Time To Live" + flavor data + default_value 255 + description "" + } + } + + cdl_option CYGPKG_LWIP_RAW { + display "Enable RAW socket support" + flavor bool + default_value 1 + description "" + compile core/raw.c + } + + cdl_component CYGPKG_LWIP_APP_MEM_OPTIONS { + display "Memory options for apps" + flavor none + no_define + description "Memory options for applications." + + cdl_option CYGNUM_LWIP_VARMEMPOOL_SIZE { + display "Size of variable memory pool" + flavor data + default_value 2048 + description " + Memory required to hold semaphore, mbox and thread structures + are allocated from this memory pool. + " + } + + + + cdl_option CYGNUM_LWIP_APP_THREADS { + display "Number of network threads in application" + flavor data + default_value 1 + description " + At startup at least two lwIP threads are created:the polling(input) thread + and the TCP/IP (output) thread.Additionally your application creates one + or more threads. + Set this option to the maximum number of threads you will create through + sys_thread_new().Threads which you create through cyg_thread_create() + are not lwIP threads and don't count.This number is needed so that enough + static memory is reserved for stack space. + " + } + + cdl_option CYGNUM_LWIP_THREAD_STACK_SIZE { + display "Size of per thread stack in lwIP" + flavor data + default_value 4096 + description " + Since stack space for threads needs to be statically allocated you can + specify the amount of memory to use for each network thread. + " + } + } + + + cdl_option CYGPKG_NET_LWIP_TESTS { + display "Some lwIP tests" + flavor data + no_define + calculated { + "tests/tcpecho tests/udpecho tests/httpd tests/socket tests/nc_test_slave tests/sys_timeout" + } + description " + This option specifies the set of tests for lwIP.They show the usage of + the raw, the sequential and the BSD socket compatible APIs" + } + +}
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/arch/cc.h @@ -0,0 +1,45 @@ +#ifndef __ARCH_CC_H__ +#define __ARCH_CC_H__ + +#include <string.h> +#include <cyg/error/codes.h> +//while EFAULT should have no meaning in eCos since there are no address spaces +//it is defined here because set/getsockopt in lwIP use it. +#define EFAULT 14 + +//found no better place for this prototype +int lwip_init(void); + +//#define LWIP_PROVIDE_ERRNO +#include <cyg/infra/cyg_type.h> +#if (CYG_BYTEORDER == CYG_LSBFIRST) +#define BYTE_ORDER LITTLE_ENDIAN +#else +#define BYTE_ORDER BIG_ENDIAN +#endif + + +typedef unsigned char u8_t; +typedef signed char s8_t; +typedef unsigned short u16_t; +typedef signed short s16_t; +typedef unsigned long u32_t; +typedef signed long s32_t; +typedef unsigned long mem_ptr_t; + + +#define PACK_STRUCT_FIELD(x) x __attribute__((packed)) +#define PACK_STRUCT_STRUCT __attribute__((packed)) +#define PACK_STRUCT_BEGIN +#define PACK_STRUCT_END + +#include <cyg/infra/diag.h> +#include <cyg/infra/cyg_ass.h> +#define LWIP_PLATFORM_DIAG(x) {diag_printf x;} +#define LWIP_PLATFORM_ASSERT(x) {CYG_FAIL(x);} + +#define SYS_ARCH_DECL_PROTECT(x) +#define SYS_ARCH_PROTECT(x) +#define SYS_ARCH_UNPROTECT(x) + +#endif /* __ARCH_CC_H__ */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/arch/perf.h @@ -0,0 +1,7 @@ +#ifndef __PERF_H__ +#define __PERF_H__ + +#define PERF_START /* null definition */ +#define PERF_STOP(x) /* null definition */ + +#endif /* __PERF_H__ */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/arch/sys_arch.h @@ -0,0 +1,13 @@ +#ifndef __SYS_ECOS_H__ +#define __SYS_ECOS_H__ + +#include <cyg/kernel/kapi.h> + +#define SYS_MBOX_NULL (sys_mbox_t)NULL +#define SYS_SEM_NULL (sys_sem_t)NULL + +typedef cyg_sem_t * sys_sem_t; +typedef cyg_handle_t sys_mbox_t; +typedef cyg_thread * sys_thread_t; +#endif /* __SYS_ECOS_H__ */ +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/api.h @@ -0,0 +1,159 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ +#ifndef __LWIP_API_H__ +#define __LWIP_API_H__ + +#include "lwip/opt.h" +#include "lwip/pbuf.h" +#include "lwip/sys.h" + +#include "lwip/ip.h" + +#include "lwip/raw.h" +#include "lwip/udp.h" +#include "lwip/tcp.h" + +#include "lwip/err.h" + +#define NETCONN_NOCOPY 0x00 +#define NETCONN_COPY 0x01 + +enum netconn_type { + NETCONN_TCP, + NETCONN_UDP, + NETCONN_UDPLITE, + NETCONN_UDPNOCHKSUM, + NETCONN_RAW +}; + +enum netconn_state { + NETCONN_NONE, + NETCONN_WRITE, + NETCONN_ACCEPT, + NETCONN_RECV, + NETCONN_CONNECT, + NETCONN_CLOSE +}; + +enum netconn_evt { + NETCONN_EVT_RCVPLUS, + NETCONN_EVT_RCVMINUS, + NETCONN_EVT_SENDPLUS, + NETCONN_EVT_SENDMINUS +}; + +struct netbuf { + struct pbuf *p, *ptr; + struct ip_addr *fromaddr; + u16_t fromport; + err_t err; +}; + +struct netconn { + enum netconn_type type; + enum netconn_state state; + union { + struct tcp_pcb *tcp; + struct udp_pcb *udp; + struct raw_pcb *raw; + } pcb; + err_t err; + sys_mbox_t mbox; + sys_mbox_t recvmbox; + sys_mbox_t acceptmbox; + sys_sem_t sem; + int socket; + u16_t recv_avail; + void (* callback)(struct netconn *, enum netconn_evt, u16_t len); +}; + +/* Network buffer functions: */ +struct netbuf * netbuf_new (void); +void netbuf_delete (struct netbuf *buf); +void * netbuf_alloc (struct netbuf *buf, u16_t size); +void netbuf_free (struct netbuf *buf); +void netbuf_ref (struct netbuf *buf, + void *dataptr, u16_t size); +void netbuf_chain (struct netbuf *head, + struct netbuf *tail); + +u16_t netbuf_len (struct netbuf *buf); +err_t netbuf_data (struct netbuf *buf, + void **dataptr, u16_t *len); +s8_t netbuf_next (struct netbuf *buf); +void netbuf_first (struct netbuf *buf); + +void netbuf_copy (struct netbuf *buf, + void *dataptr, u16_t len); +void netbuf_copy_partial(struct netbuf *buf, void *dataptr, + u16_t len, u16_t offset); +struct ip_addr * netbuf_fromaddr (struct netbuf *buf); +u16_t netbuf_fromport (struct netbuf *buf); + +/* Network connection functions: */ +struct netconn * netconn_new (enum netconn_type type); +struct +netconn *netconn_new_with_callback(enum netconn_type t, + void (*callback)(struct netconn *, enum netconn_evt, u16_t len)); +struct +netconn *netconn_new_with_proto_and_callback(enum netconn_type t, u16_t proto, + void (*callback)(struct netconn *, enum netconn_evt, u16_t len)); +err_t netconn_delete (struct netconn *conn); +enum netconn_type netconn_type (struct netconn *conn); +err_t netconn_peer (struct netconn *conn, + struct ip_addr *addr, + u16_t *port); +err_t netconn_addr (struct netconn *conn, + struct ip_addr **addr, + u16_t *port); +err_t netconn_bind (struct netconn *conn, + struct ip_addr *addr, + u16_t port); +err_t netconn_connect (struct netconn *conn, + struct ip_addr *addr, + u16_t port); +err_t netconn_disconnect (struct netconn *conn); +err_t netconn_listen (struct netconn *conn); +struct netconn * netconn_accept (struct netconn *conn); +struct netbuf * netconn_recv (struct netconn *conn); +err_t netconn_send (struct netconn *conn, + struct netbuf *buf); +err_t netconn_write (struct netconn *conn, + void *dataptr, u16_t size, + u8_t copy); +err_t netconn_close (struct netconn *conn); + +err_t netconn_err (struct netconn *conn); + +#endif /* __LWIP_API_H__ */ + +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/api_msg.h @@ -0,0 +1,94 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ +#ifndef __LWIP_API_MSG_H__ +#define __LWIP_API_MSG_H__ + +#include "lwip/opt.h" +#include "lwip/pbuf.h" +#include "lwip/sys.h" + +#include "lwip/ip.h" + +#include "lwip/udp.h" +#include "lwip/tcp.h" + +#include "lwip/api.h" + +enum api_msg_type { + API_MSG_NEWCONN, + API_MSG_DELCONN, + + API_MSG_BIND, + API_MSG_CONNECT, + API_MSG_DISCONNECT, + + API_MSG_LISTEN, + API_MSG_ACCEPT, + + API_MSG_SEND, + API_MSG_RECV, + API_MSG_WRITE, + + API_MSG_CLOSE, + + API_MSG_MAX +}; + +struct api_msg_msg { + struct netconn *conn; + enum netconn_type conntype; + union { + struct pbuf *p; + struct { + struct ip_addr *ipaddr; + u16_t port; + } bc; + struct { + void *dataptr; + u16_t len; + unsigned char copy; + } w; + sys_mbox_t mbox; + u16_t len; + } msg; +}; + +struct api_msg { + enum api_msg_type type; + struct api_msg_msg msg; +}; + +void api_msg_input(struct api_msg *msg); +void api_msg_post(struct api_msg *msg); + +#endif /* __LWIP_API_MSG_H__ */ +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/arch.h @@ -0,0 +1,216 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ +#ifndef __LWIP_ARCH_H__ +#define __LWIP_ARCH_H__ + +#ifndef LITTLE_ENDIAN +#define LITTLE_ENDIAN 1234 +#endif + +#ifndef BIG_ENDIAN +#define BIG_ENDIAN 4321 +#endif + +#include "arch/cc.h" + +#ifndef PACK_STRUCT_BEGIN +#define PACK_STRUCT_BEGIN +#endif /* PACK_STRUCT_BEGIN */ + +#ifndef PACK_STRUCT_END +#define PACK_STRUCT_END +#endif /* PACK_STRUCT_END */ + +#ifndef PACK_STRUCT_FIELD +#define PACK_STRUCT_FIELD(x) x +#endif /* PACK_STRUCT_FIELD */ + + + +#ifdef LWIP_PROVIDE_ERRNO + +#define EPERM 1 /* Operation not permitted */ +#define ENOENT 2 /* No such file or directory */ +#define ESRCH 3 /* No such process */ +#define EINTR 4 /* Interrupted system call */ +#define EIO 5 /* I/O error */ +#define ENXIO 6 /* No such device or address */ +#define E2BIG 7 /* Arg list too long */ +#define ENOEXEC 8 /* Exec format error */ +#define EBADF 9 /* Bad file number */ +#define ECHILD 10 /* No child processes */ +#define EAGAIN 11 /* Try again */ +#define ENOMEM 12 /* Out of memory */ +#define EACCES 13 /* Permission denied */ +#define EFAULT 14 /* Bad address */ +#define ENOTBLK 15 /* Block device required */ +#define EBUSY 16 /* Device or resource busy */ +#define EEXIST 17 /* File exists */ +#define EXDEV 18 /* Cross-device link */ +#define ENODEV 19 /* No such device */ +#define ENOTDIR 20 /* Not a directory */ +#define EISDIR 21 /* Is a directory */ +#define EINVAL 22 /* Invalid argument */ +#define ENFILE 23 /* File table overflow */ +#define EMFILE 24 /* Too many open files */ +#define ENOTTY 25 /* Not a typewriter */ +#define ETXTBSY 26 /* Text file busy */ +#define EFBIG 27 /* File too large */ +#define ENOSPC 28 /* No space left on device */ +#define ESPIPE 29 /* Illegal seek */ +#define EROFS 30 /* Read-only file system */ +#define EMLINK 31 /* Too many links */ +#define EPIPE 32 /* Broken pipe */ +#define EDOM 33 /* Math argument out of domain of func */ +#define ERANGE 34 /* Math result not representable */ +#define EDEADLK 35 /* Resource deadlock would occur */ +#define ENAMETOOLONG 36 /* File name too long */ +#define ENOLCK 37 /* No record locks available */ +#define ENOSYS 38 /* Function not implemented */ +#define ENOTEMPTY 39 /* Directory not empty */ +#define ELOOP 40 /* Too many symbolic links encountered */ +#define EWOULDBLOCK EAGAIN /* Operation would block */ +#define ENOMSG 42 /* No message of desired type */ +#define EIDRM 43 /* Identifier removed */ +#define ECHRNG 44 /* Channel number out of range */ +#define EL2NSYNC 45 /* Level 2 not synchronized */ +#define EL3HLT 46 /* Level 3 halted */ +#define EL3RST 47 /* Level 3 reset */ +#define ELNRNG 48 /* Link number out of range */ +#define EUNATCH 49 /* Protocol driver not attached */ +#define ENOCSI 50 /* No CSI structure available */ +#define EL2HLT 51 /* Level 2 halted */ +#define EBADE 52 /* Invalid exchange */ +#define EBADR 53 /* Invalid request descriptor */ +#define EXFULL 54 /* Exchange full */ +#define ENOANO 55 /* No anode */ +#define EBADRQC 56 /* Invalid request code */ +#define EBADSLT 57 /* Invalid slot */ + +#define EDEADLOCK EDEADLK + +#define EBFONT 59 /* Bad font file format */ +#define ENOSTR 60 /* Device not a stream */ +#define ENODATA 61 /* No data available */ +#define ETIME 62 /* Timer expired */ +#define ENOSR 63 /* Out of streams resources */ +#define ENONET 64 /* Machine is not on the network */ +#define ENOPKG 65 /* Package not installed */ +#define EREMOTE 66 /* Object is remote */ +#define ENOLINK 67 /* Link has been severed */ +#define EADV 68 /* Advertise error */ +#define ESRMNT 69 /* Srmount error */ +#define ECOMM 70 /* Communication error on send */ +#define EPROTO 71 /* Protocol error */ +#define EMULTIHOP 72 /* Multihop attempted */ +#define EDOTDOT 73 /* RFS specific error */ +#define EBADMSG 74 /* Not a data message */ +#define EOVERFLOW 75 /* Value too large for defined data type */ +#define ENOTUNIQ 76 /* Name not unique on network */ +#define EBADFD 77 /* File descriptor in bad state */ +#define EREMCHG 78 /* Remote address changed */ +#define ELIBACC 79 /* Can not access a needed shared library */ +#define ELIBBAD 80 /* Accessing a corrupted shared library */ +#define ELIBSCN 81 /* .lib section in a.out corrupted */ +#define ELIBMAX 82 /* Attempting to link in too many shared libraries */ +#define ELIBEXEC 83 /* Cannot exec a shared library directly */ +#define EILSEQ 84 /* Illegal byte sequence */ +#define ERESTART 85 /* Interrupted system call should be restarted */ +#define ESTRPIPE 86 /* Streams pipe error */ +#define EUSERS 87 /* Too many users */ +#define ENOTSOCK 88 /* Socket operation on non-socket */ +#define EDESTADDRREQ 89 /* Destination address required */ +#define EMSGSIZE 90 /* Message too long */ +#define EPROTOTYPE 91 /* Protocol wrong type for socket */ +#define ENOPROTOOPT 92 /* Protocol not available */ +#define EPROTONOSUPPORT 93 /* Protocol not supported */ +#define ESOCKTNOSUPPORT 94 /* Socket type not supported */ +#define EOPNOTSUPP 95 /* Operation not supported on transport endpoint */ +#define EPFNOSUPPORT 96 /* Protocol family not supported */ +#define EAFNOSUPPORT 97 /* Address family not supported by protocol */ +#define EADDRINUSE 98 /* Address already in use */ +#define EADDRNOTAVAIL 99 /* Cannot assign requested address */ +#define ENETDOWN 100 /* Network is down */ +#define ENETUNREACH 101 /* Network is unreachable */ +#define ENETRESET 102 /* Network dropped connection because of reset */ +#define ECONNABORTED 103 /* Software caused connection abort */ +#define ECONNRESET 104 /* Connection reset by peer */ +#define ENOBUFS 105 /* No buffer space available */ +#define EISCONN 106 /* Transport endpoint is already connected */ +#define ENOTCONN 107 /* Transport endpoint is not connected */ +#define ESHUTDOWN 108 /* Cannot send after transport endpoint shutdown */ +#define ETOOMANYREFS 109 /* Too many references: cannot splice */ +#define ETIMEDOUT 110 /* Connection timed out */ +#define ECONNREFUSED 111 /* Connection refused */ +#define EHOSTDOWN 112 /* Host is down */ +#define EHOSTUNREACH 113 /* No route to host */ +#define EALREADY 114 /* Operation already in progress */ +#define EINPROGRESS 115 /* Operation now in progress */ +#define ESTALE 116 /* Stale NFS file handle */ +#define EUCLEAN 117 /* Structure needs cleaning */ +#define ENOTNAM 118 /* Not a XENIX named type file */ +#define ENAVAIL 119 /* No XENIX semaphores available */ +#define EISNAM 120 /* Is a named type file */ +#define EREMOTEIO 121 /* Remote I/O error */ +#define EDQUOT 122 /* Quota exceeded */ + +#define ENOMEDIUM 123 /* No medium found */ +#define EMEDIUMTYPE 124 /* Wrong medium type */ + + +#define ENSROK 0 /* DNS server returned answer with no data */ +#define ENSRNODATA 160 /* DNS server returned answer with no data */ +#define ENSRFORMERR 161 /* DNS server claims query was misformatted */ +#define ENSRSERVFAIL 162 /* DNS server returned general failure */ +#define ENSRNOTFOUND 163 /* Domain name not found */ +#define ENSRNOTIMP 164 /* DNS server does not implement requested operation */ +#define ENSRREFUSED 165 /* DNS server refused query */ +#define ENSRBADQUERY 166 /* Misformatted DNS query */ +#define ENSRBADNAME 167 /* Misformatted domain name */ +#define ENSRBADFAMILY 168 /* Unsupported address family */ +#define ENSRBADRESP 169 /* Misformatted DNS reply */ +#define ENSRCONNREFUSED 170 /* Could not contact DNS servers */ +#define ENSRTIMEOUT 171 /* Timeout while contacting DNS servers */ +#define ENSROF 172 /* End of file */ +#define ENSRFILE 173 /* Error reading file */ +#define ENSRNOMEM 174 /* Out of memory */ +#define ENSRDESTRUCTION 175 /* Application terminated lookup */ +#define ENSRQUERYDOMAINTOOLONG 176 /* Domain name is too long */ +#define ENSRCNAMELOOP 177 /* Domain name is too long */ + +#ifndef errno +extern int errno; +#endif + +#endif /* LWIP_PROVIDE_ERRNO */ + +#endif /* __LWIP_ARCH_H__ */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/debug.h @@ -0,0 +1,87 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ +#ifndef __LWIP_DEBUG_H__ +#define __LWIP_DEBUG_H__ + +#include "arch/cc.h" + +/** lower two bits indicate debug level + * - 0 off + * - 1 warning + * - 2 serious + * - 3 severe + */ + +#define DBG_LEVEL_OFF 0 +#define DBG_LEVEL_WARNING 1 /* bad checksums, dropped packets, ... */ +#define DBG_LEVEL_SERIOUS 2 /* memory allocation failures, ... */ +#define DBG_LEVEL_SEVERE 3 /* */ +#define DBG_MASK_LEVEL 3 + +/** flag for LWIP_DEBUGF to enable that debug message */ +#define DBG_ON 0x80U +/** flag for LWIP_DEBUGF to disable that debug message */ +#define DBG_OFF 0x00U + +/** flag for LWIP_DEBUGF indicating a tracing message (to follow program flow) */ +#define DBG_TRACE 0x40U +/** flag for LWIP_DEBUGF indicating a state debug message (to follow module states) */ +#define DBG_STATE 0x20U +/** flag for LWIP_DEBUGF indicating newly added code, not thoroughly tested yet */ +#define DBG_FRESH 0x10U +/** flag for LWIP_DEBUGF to halt after printing this debug message */ +#define DBG_HALT 0x08U + +#ifndef LWIP_NOASSERT +# define LWIP_ASSERT(x,y) do { if(!(y)) LWIP_PLATFORM_ASSERT(x); } while(0) +#else +# define LWIP_ASSERT(x,y) +#endif + +#ifdef LWIP_DEBUG +/** print debug message only if debug message type is enabled... + * AND is of correct type AND is at least DBG_LEVEL + */ +# define LWIP_DEBUGF(debug,x) do { if (((debug) & DBG_ON) && ((debug) & DBG_TYPES_ON) && (((debug) & DBG_MASK_LEVEL) >= DBG_MIN_LEVEL)) { LWIP_PLATFORM_DIAG(x); if ((debug) & DBG_HALT) while(1); } } while(0) +# define LWIP_ERROR(x) do { LWIP_PLATFORM_DIAG(x); } while(0) +#else /* LWIP_DEBUG */ +# define LWIP_DEBUGF(debug,x) +# define LWIP_ERROR(x) +#endif /* LWIP_DEBUG */ + +#endif /* __LWIP_DEBUG_H__ */ + + + + + +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/def.h @@ -0,0 +1,47 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ +#ifndef __LWIP_DEF_H__ +#define __LWIP_DEF_H__ + +/* this might define NULL already */ +#include "arch/cc.h" + +#define LWIP_MAX(x , y) (x) > (y) ? (x) : (y) +#define LWIP_MIN(x , y) (x) < (y) ? (x) : (y) + +#ifndef NULL +#define NULL ((void *)0) +#endif + + +#endif /* __LWIP_DEF_H__ */ +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/dhcp.h @@ -0,0 +1,212 @@ +/** @file + */ + +#ifndef __LWIP_DHCP_H__ +#define __LWIP_DHCP_H__ + +#include "lwip/opt.h" +#include "lwip/netif.h" +#include "lwip/udp.h" + +/** period (in seconds) of the application calling dhcp_coarse_tmr() */ +#define DHCP_COARSE_TIMER_SECS 60 +/** period (in milliseconds) of the application calling dhcp_fine_tmr() */ +#define DHCP_FINE_TIMER_MSECS 500 + +struct dhcp +{ + /** current DHCP state machine state */ + u8_t state; + /** retries of current request */ + u8_t tries; + /** transaction identifier of last sent request */ + u32_t xid; + /** our connection to the DHCP server */ + struct udp_pcb *pcb; + /** (first) pbuf of incoming msg */ + struct pbuf *p; + /** incoming msg */ + struct dhcp_msg *msg_in; + /** incoming msg options */ + struct dhcp_msg *options_in; + /** ingoing msg options length */ + u16_t options_in_len; + + struct pbuf *p_out; /* pbuf of outcoming msg */ + struct dhcp_msg *msg_out; /* outgoing msg */ + u16_t options_out_len; /* outgoing msg options length */ + u16_t request_timeout; /* #ticks with period DHCP_FINE_TIMER_SECS for request timeout */ + u16_t t1_timeout; /* #ticks with period DHCP_COARSE_TIMER_SECS for renewal time */ + u16_t t2_timeout; /* #ticks with period DHCP_COARSE_TIMER_SECS for rebind time */ + struct ip_addr server_ip_addr; /* dhcp server address that offered this lease */ + struct ip_addr offered_ip_addr; + struct ip_addr offered_sn_mask; + struct ip_addr offered_gw_addr; + struct ip_addr offered_bc_addr; + u32_t offered_t0_lease; /* lease period (in seconds) */ + u32_t offered_t1_renew; /* recommended renew time (usually 50% of lease period) */ + u32_t offered_t2_rebind; /* recommended rebind time (usually 66% of lease period) */ +/** Patch #1308 + * TODO: See dhcp.c "TODO"s + */ +#if 0 + struct ip_addr offered_si_addr; + u8_t *boot_file_name; +#endif +}; + +/* MUST be compiled with "pack structs" or equivalent! */ +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +/** minimum set of fields of any DHCP message */ +struct dhcp_msg +{ + PACK_STRUCT_FIELD(u8_t op); + PACK_STRUCT_FIELD(u8_t htype); + PACK_STRUCT_FIELD(u8_t hlen); + PACK_STRUCT_FIELD(u8_t hops); + PACK_STRUCT_FIELD(u32_t xid); + PACK_STRUCT_FIELD(u16_t secs); + PACK_STRUCT_FIELD(u16_t flags); + PACK_STRUCT_FIELD(struct ip_addr ciaddr); + PACK_STRUCT_FIELD(struct ip_addr yiaddr); + PACK_STRUCT_FIELD(struct ip_addr siaddr); + PACK_STRUCT_FIELD(struct ip_addr giaddr); +#define DHCP_CHADDR_LEN 16U + PACK_STRUCT_FIELD(u8_t chaddr[DHCP_CHADDR_LEN]); +#define DHCP_SNAME_LEN 64U + PACK_STRUCT_FIELD(u8_t sname[DHCP_SNAME_LEN]); +#define DHCP_FILE_LEN 128U + PACK_STRUCT_FIELD(u8_t file[DHCP_FILE_LEN]); + PACK_STRUCT_FIELD(u32_t cookie); +#define DHCP_MIN_OPTIONS_LEN 68U +/** allow this to be configured in lwipopts.h, but not too small */ +#if ((!defined(DHCP_OPTIONS_LEN)) || (DHCP_OPTIONS_LEN < DHCP_MIN_OPTIONS_LEN)) +/** set this to be sufficient for your options in outgoing DHCP msgs */ +# define DHCP_OPTIONS_LEN DHCP_MIN_OPTIONS_LEN +#endif + PACK_STRUCT_FIELD(u8_t options[DHCP_OPTIONS_LEN]); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +/** start DHCP configuration */ +err_t dhcp_start(struct netif *netif); +/** stop DHCP configuration */ +void dhcp_stop(struct netif *netif); +/** enforce lease renewal */ +err_t dhcp_renew(struct netif *netif); +/** inform server of our IP address */ +void dhcp_inform(struct netif *netif); + +/** if enabled, check whether the offered IP address is not in use, using ARP */ +#if DHCP_DOES_ARP_CHECK +void dhcp_arp_reply(struct netif *netif, struct ip_addr *addr); +#endif + +/** to be called every minute */ +void dhcp_coarse_tmr(void); +/** to be called every half second */ +void dhcp_fine_tmr(void); + +/** DHCP message item offsets and length */ +#define DHCP_MSG_OFS (UDP_DATA_OFS) + #define DHCP_OP_OFS (DHCP_MSG_OFS + 0) + #define DHCP_HTYPE_OFS (DHCP_MSG_OFS + 1) + #define DHCP_HLEN_OFS (DHCP_MSG_OFS + 2) + #define DHCP_HOPS_OFS (DHCP_MSG_OFS + 3) + #define DHCP_XID_OFS (DHCP_MSG_OFS + 4) + #define DHCP_SECS_OFS (DHCP_MSG_OFS + 8) + #define DHCP_FLAGS_OFS (DHCP_MSG_OFS + 10) + #define DHCP_CIADDR_OFS (DHCP_MSG_OFS + 12) + #define DHCP_YIADDR_OFS (DHCP_MSG_OFS + 16) + #define DHCP_SIADDR_OFS (DHCP_MSG_OFS + 20) + #define DHCP_GIADDR_OFS (DHCP_MSG_OFS + 24) + #define DHCP_CHADDR_OFS (DHCP_MSG_OFS + 28) + #define DHCP_SNAME_OFS (DHCP_MSG_OFS + 44) + #define DHCP_FILE_OFS (DHCP_MSG_OFS + 108) +#define DHCP_MSG_LEN 236 + +#define DHCP_COOKIE_OFS (DHCP_MSG_OFS + DHCP_MSG_LEN) +#define DHCP_OPTIONS_OFS (DHCP_MSG_OFS + DHCP_MSG_LEN + 4) + +#define DHCP_CLIENT_PORT 68 +#define DHCP_SERVER_PORT 67 + +/** DHCP client states */ +#define DHCP_REQUESTING 1 +#define DHCP_INIT 2 +#define DHCP_REBOOTING 3 +#define DHCP_REBINDING 4 +#define DHCP_RENEWING 5 +#define DHCP_SELECTING 6 +#define DHCP_INFORMING 7 +#define DHCP_CHECKING 8 +#define DHCP_PERMANENT 9 +#define DHCP_BOUND 10 +/** not yet implemented #define DHCP_RELEASING 11 */ +#define DHCP_BACKING_OFF 12 +#define DHCP_OFF 13 + +#define DHCP_BOOTREQUEST 1 +#define DHCP_BOOTREPLY 2 + +#define DHCP_DISCOVER 1 +#define DHCP_OFFER 2 +#define DHCP_REQUEST 3 +#define DHCP_DECLINE 4 +#define DHCP_ACK 5 +#define DHCP_NAK 6 +#define DHCP_RELEASE 7 +#define DHCP_INFORM 8 + +#define DHCP_HTYPE_ETH 1 + +#define DHCP_HLEN_ETH 6 + +#define DHCP_BROADCAST_FLAG 15 +#define DHCP_BROADCAST_MASK (1 << DHCP_FLAG_BROADCAST) + +/** BootP options */ +#define DHCP_OPTION_PAD 0 +#define DHCP_OPTION_SUBNET_MASK 1 /* RFC 2132 3.3 */ +#define DHCP_OPTION_ROUTER 3 +#define DHCP_OPTION_HOSTNAME 12 +#define DHCP_OPTION_IP_TTL 23 +#define DHCP_OPTION_MTU 26 +#define DHCP_OPTION_BROADCAST 28 +#define DHCP_OPTION_TCP_TTL 37 +#define DHCP_OPTION_END 255 + +/** DHCP options */ +#define DHCP_OPTION_REQUESTED_IP 50 /* RFC 2132 9.1, requested IP address */ +#define DHCP_OPTION_LEASE_TIME 51 /* RFC 2132 9.2, time in seconds, in 4 bytes */ +#define DHCP_OPTION_OVERLOAD 52 /* RFC2132 9.3, use file and/or sname field for options */ + +#define DHCP_OPTION_MESSAGE_TYPE 53 /* RFC 2132 9.6, important for DHCP */ +#define DHCP_OPTION_MESSAGE_TYPE_LEN 1 + + +#define DHCP_OPTION_SERVER_ID 54 /* RFC 2132 9.7, server IP address */ +#define DHCP_OPTION_PARAMETER_REQUEST_LIST 55 /* RFC 2132 9.8, requested option types */ + +#define DHCP_OPTION_MAX_MSG_SIZE 57 /* RFC 2132 9.10, message size accepted >= 576 */ +#define DHCP_OPTION_MAX_MSG_SIZE_LEN 2 + +#define DHCP_OPTION_T1 58 /* T1 renewal time */ +#define DHCP_OPTION_T2 59 /* T2 rebinding time */ +#define DHCP_OPTION_CLIENT_ID 61 +#define DHCP_OPTION_TFTP_SERVERNAME 66 +#define DHCP_OPTION_BOOTFILE 67 + +/** possible combinations of overloading the file and sname fields with options */ +#define DHCP_OVERLOAD_NONE 0 +#define DHCP_OVERLOAD_FILE 1 +#define DHCP_OVERLOAD_SNAME 2 +#define DHCP_OVERLOAD_SNAME_FILE 3 + +#endif /*__LWIP_DHCP_H__*/
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/err.h @@ -0,0 +1,70 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ +#ifndef __LWIP_ERR_H__ +#define __LWIP_ERR_H__ + +#include "lwip/opt.h" + +#include "arch/cc.h" + +typedef s8_t err_t; + +/* Definitions for error constants. */ + +#define ERR_OK 0 /* No error, everything OK. */ +#define ERR_MEM -1 /* Out of memory error. */ +#define ERR_BUF -2 /* Buffer error. */ + + +#define ERR_ABRT -3 /* Connection aborted. */ +#define ERR_RST -4 /* Connection reset. */ +#define ERR_CLSD -5 /* Connection closed. */ +#define ERR_CONN -6 /* Not connected. */ + +#define ERR_VAL -7 /* Illegal value. */ + +#define ERR_ARG -8 /* Illegal argument. */ + +#define ERR_RTE -9 /* Routing problem. */ + +#define ERR_USE -10 /* Address in use. */ + +#define ERR_IF -11 /* Low-level netif error */ +#define ERR_ISCONN -12 /* Already connected. */ + + +#ifdef LWIP_DEBUG +extern char *lwip_strerr(err_t err); +#else +#define lwip_strerr(x) "" +#endif /* LWIP_DEBUG */ +#endif /* __LWIP_ERR_H__ */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/icmp.h @@ -0,0 +1,112 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ +#ifndef __LWIP_ICMP_H__ +#define __LWIP_ICMP_H__ + +#include "lwip/arch.h" + +#include "lwip/opt.h" +#include "lwip/pbuf.h" + +#include "lwip/ip_addr.h" +#include "lwip/netif.h" + +#define ICMP_ER 0 /* echo reply */ +#define ICMP_DUR 3 /* destination unreachable */ +#define ICMP_SQ 4 /* source quench */ +#define ICMP_RD 5 /* redirect */ +#define ICMP_ECHO 8 /* echo */ +#define ICMP_TE 11 /* time exceeded */ +#define ICMP_PP 12 /* parameter problem */ +#define ICMP_TS 13 /* timestamp */ +#define ICMP_TSR 14 /* timestamp reply */ +#define ICMP_IRQ 15 /* information request */ +#define ICMP_IR 16 /* information reply */ + +enum icmp_dur_type { + ICMP_DUR_NET = 0, /* net unreachable */ + ICMP_DUR_HOST = 1, /* host unreachable */ + ICMP_DUR_PROTO = 2, /* protocol unreachable */ + ICMP_DUR_PORT = 3, /* port unreachable */ + ICMP_DUR_FRAG = 4, /* fragmentation needed and DF set */ + ICMP_DUR_SR = 5 /* source route failed */ +}; + +enum icmp_te_type { + ICMP_TE_TTL = 0, /* time to live exceeded in transit */ + ICMP_TE_FRAG = 1 /* fragment reassembly time exceeded */ +}; + +void icmp_input(struct pbuf *p, struct netif *inp); + +void icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t); +void icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t); + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct icmp_echo_hdr { + PACK_STRUCT_FIELD(u16_t _type_code); + PACK_STRUCT_FIELD(u16_t chksum); + PACK_STRUCT_FIELD(u16_t id); + PACK_STRUCT_FIELD(u16_t seqno); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END + +PACK_STRUCT_BEGIN +struct icmp_dur_hdr { + PACK_STRUCT_FIELD(u16_t _type_code); + PACK_STRUCT_FIELD(u16_t chksum); + PACK_STRUCT_FIELD(u32_t unused); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END + +PACK_STRUCT_BEGIN +struct icmp_te_hdr { + PACK_STRUCT_FIELD(u16_t _type_code); + PACK_STRUCT_FIELD(u16_t chksum); + PACK_STRUCT_FIELD(u32_t unused); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +#define ICMPH_TYPE(hdr) (ntohs((hdr)->_type_code) >> 8) +#define ICMPH_CODE(hdr) (ntohs((hdr)->_type_code) & 0xff) + +#define ICMPH_TYPE_SET(hdr, type) ((hdr)->_type_code = htons(ICMPH_CODE(hdr) | ((type) << 8))) +#define ICMPH_CODE_SET(hdr, code) ((hdr)->_type_code = htons((code) | (ICMPH_TYPE(hdr) << 8))) + +#endif /* __LWIP_ICMP_H__ */ +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/inet.h @@ -0,0 +1,84 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ +#ifndef __LWIP_INET_H__ +#define __LWIP_INET_H__ + +#include "lwip/arch.h" + +#include "lwip/opt.h" +#include "lwip/pbuf.h" +#include "lwip/ip_addr.h" + +u16_t inet_chksum(void *dataptr, u16_t len); +u16_t inet_chksum_pbuf(struct pbuf *p); +u16_t inet_chksum_pseudo(struct pbuf *p, + struct ip_addr *src, struct ip_addr *dest, + u8_t proto, u16_t proto_len); + +u32_t inet_addr(const char *cp); +int inet_aton(const char *cp, struct in_addr *addr); +char *inet_ntoa(struct in_addr addr); /* returns ptr to static buffer; not reentrant! */ + +#ifdef htons +#undef htons +#endif /* htons */ +#ifdef htonl +#undef htonl +#endif /* htonl */ +#ifdef ntohs +#undef ntohs +#endif /* ntohs */ +#ifdef ntohl +#undef ntohl +#endif /* ntohl */ + +#if BYTE_ORDER == BIG_ENDIAN +#define htons(x) (x) +#define ntohs(x) (x) +#define htonl(x) (x) +#define ntohl(x) (x) +#else +#ifdef LWIP_PREFIX_BYTEORDER_FUNCS +/* workaround for naming collisions on some platforms */ +#define htons lwip_htons +#define ntohs lwip_ntohs +#define htonl lwip_htonl +#define ntohl lwip_ntohl +#endif +u16_t htons(u16_t x); +u16_t ntohs(u16_t x); +u32_t htonl(u32_t x); +u32_t ntohl(u32_t x); +#endif + +#endif /* __LWIP_INET_H__ */ +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/ip.h @@ -0,0 +1,155 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ +#ifndef __LWIP_IP_H__ +#define __LWIP_IP_H__ + +#include "lwip/arch.h" + +#include "lwip/def.h" +#include "lwip/pbuf.h" +#include "lwip/ip_addr.h" + +#include "lwip/err.h" + +struct netif; + +void ip_init(void); +struct netif *ip_route(struct ip_addr *dest); +err_t ip_input(struct pbuf *p, struct netif *inp); +err_t ip_output(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest, + u8_t ttl, u8_t tos, u8_t proto); +err_t ip_output_if(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest, + u8_t ttl, u8_t tos, u8_t proto, + struct netif *netif); + +#define IP_HLEN 20 + +#define IP_PROTO_ICMP 1 +#define IP_PROTO_UDP 17 +#define IP_PROTO_UDPLITE 170 +#define IP_PROTO_TCP 6 + +/* This is passed as the destination address to ip_output_if (not + to ip_output), meaning that an IP header already is constructed + in the pbuf. This is used when TCP retransmits. */ +#ifdef IP_HDRINCL +#undef IP_HDRINCL +#endif /* IP_HDRINCL */ +#define IP_HDRINCL NULL + + +/* This is the common part of all PCB types. It needs to be at the + beginning of a PCB type definition. It is located here so that + changes to this common part are made in one location instead of + having to change all PCB structs. */ +#define IP_PCB struct ip_addr local_ip; \ + struct ip_addr remote_ip; \ + /* Socket options */ \ + u16_t so_options; \ + /* Type Of Service */ \ + u8_t tos; \ + /* Time To Live */ \ + u8_t ttl + +/* + * Option flags per-socket. These are the same like SO_XXX. + */ +#define SOF_DEBUG (u16_t)0x0001U /* turn on debugging info recording */ +#define SOF_ACCEPTCONN (u16_t)0x0002U /* socket has had listen() */ +#define SOF_REUSEADDR (u16_t)0x0004U /* allow local address reuse */ +#define SOF_KEEPALIVE (u16_t)0x0008U /* keep connections alive */ +#define SOF_DONTROUTE (u16_t)0x0010U /* just use interface addresses */ +#define SOF_BROADCAST (u16_t)0x0020U /* permit sending of broadcast msgs */ +#define SOF_USELOOPBACK (u16_t)0x0040U /* bypass hardware when possible */ +#define SOF_LINGER (u16_t)0x0080U /* linger on close if data present */ +#define SOF_OOBINLINE (u16_t)0x0100U /* leave received OOB data in line */ +#define SOF_REUSEPORT (u16_t)0x0200U /* allow local address & port reuse */ + + + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct ip_hdr { + /* version / header length / type of service */ + PACK_STRUCT_FIELD(u16_t _v_hl_tos); + /* total length */ + PACK_STRUCT_FIELD(u16_t _len); + /* identification */ + PACK_STRUCT_FIELD(u16_t _id); + /* fragment offset field */ + PACK_STRUCT_FIELD(u16_t _offset); +#define IP_RF 0x8000 /* reserved fragment flag */ +#define IP_DF 0x4000 /* dont fragment flag */ +#define IP_MF 0x2000 /* more fragments flag */ +#define IP_OFFMASK 0x1fff /* mask for fragmenting bits */ + /* time to live / protocol*/ + PACK_STRUCT_FIELD(u16_t _ttl_proto); + /* checksum */ + PACK_STRUCT_FIELD(u16_t _chksum); + /* source and destination IP addresses */ + PACK_STRUCT_FIELD(struct ip_addr src); + PACK_STRUCT_FIELD(struct ip_addr dest); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +#define IPH_V(hdr) (ntohs((hdr)->_v_hl_tos) >> 12) +#define IPH_HL(hdr) ((ntohs((hdr)->_v_hl_tos) >> 8) & 0x0f) +#define IPH_TOS(hdr) (htons((ntohs((hdr)->_v_hl_tos) & 0xff))) +#define IPH_LEN(hdr) ((hdr)->_len) +#define IPH_ID(hdr) ((hdr)->_id) +#define IPH_OFFSET(hdr) ((hdr)->_offset) +#define IPH_TTL(hdr) (ntohs((hdr)->_ttl_proto) >> 8) +#define IPH_PROTO(hdr) (ntohs((hdr)->_ttl_proto) & 0xff) +#define IPH_CHKSUM(hdr) ((hdr)->_chksum) + +#define IPH_VHLTOS_SET(hdr, v, hl, tos) (hdr)->_v_hl_tos = (htons(((v) << 12) | ((hl) << 8) | (tos))) +#define IPH_LEN_SET(hdr, len) (hdr)->_len = (len) +#define IPH_ID_SET(hdr, id) (hdr)->_id = (id) +#define IPH_OFFSET_SET(hdr, off) (hdr)->_offset = (off) +#define IPH_TTL_SET(hdr, ttl) (hdr)->_ttl_proto = (htons(IPH_PROTO(hdr) | ((ttl) << 8))) +#define IPH_PROTO_SET(hdr, proto) (hdr)->_ttl_proto = (htons((proto) | (IPH_TTL(hdr) << 8))) +#define IPH_CHKSUM_SET(hdr, chksum) (hdr)->_chksum = (chksum) + +#if IP_DEBUG +void ip_debug_print(struct pbuf *p); +#else +#define ip_debug_print(p) +#endif /* IP_DEBUG */ + +#endif /* __LWIP_IP_H__ */ + +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/ip_addr.h @@ -0,0 +1,151 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ +#ifndef __LWIP_IP_ADDR_H__ +#define __LWIP_IP_ADDR_H__ + +#include "lwip/arch.h" + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct ip_addr { + PACK_STRUCT_FIELD(u32_t addr); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct ip_addr2 { + PACK_STRUCT_FIELD(u16_t addrw[2]); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +/* For compatibility with BSD code */ +struct in_addr { + u32_t s_addr; +}; + +struct netif; + +extern const struct ip_addr ip_addr_any; +extern const struct ip_addr ip_addr_broadcast; + +/** IP_ADDR_ can be used as a fixed IP address + * for the wildcard and the broadcast address + */ +#define IP_ADDR_ANY ((struct ip_addr *)&ip_addr_any) +#define IP_ADDR_BROADCAST ((struct ip_addr *)&ip_addr_broadcast) + +#define INADDR_NONE ((u32_t) 0xffffffff) /* 255.255.255.255 */ +#define INADDR_LOOPBACK ((u32_t) 0x7f000001) /* 127.0.0.1 */ + +/* Definitions of the bits in an Internet address integer. + + On subnets, host and network parts are found according to + the subnet mask, not these masks. */ + +#define IN_CLASSA(a) ((((u32_t)(a)) & 0x80000000) == 0) +#define IN_CLASSA_NET 0xff000000 +#define IN_CLASSA_NSHIFT 24 +#define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET) +#define IN_CLASSA_MAX 128 + +#define IN_CLASSB(a) ((((u32_t)(a)) & 0xc0000000) == 0x80000000) +#define IN_CLASSB_NET 0xffff0000 +#define IN_CLASSB_NSHIFT 16 +#define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET) +#define IN_CLASSB_MAX 65536 + +#define IN_CLASSC(a) ((((u32_t)(a)) & 0xe0000000) == 0xc0000000) +#define IN_CLASSC_NET 0xffffff00 +#define IN_CLASSC_NSHIFT 8 +#define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET) + +#define IN_CLASSD(a) (((u32_t)(a) & 0xf0000000) == 0xe0000000) +#define IN_CLASSD_NET 0xf0000000 /* These ones aren't really */ +#define IN_CLASSD_NSHIFT 28 /* net and host fields, but */ +#define IN_CLASSD_HOST 0x0fffffff /* routing needn't know. */ +#define IN_MULTICAST(a) IN_CLASSD(a) + +#define IN_EXPERIMENTAL(a) (((u32_t)(a) & 0xf0000000) == 0xf0000000) +#define IN_BADCLASS(a) (((u32_t)(a) & 0xf0000000) == 0xf0000000) + +#define IN_LOOPBACKNET 127 /* official! */ + + +#define IP4_ADDR(ipaddr, a,b,c,d) (ipaddr)->addr = htonl(((u32_t)(a & 0xff) << 24) | ((u32_t)(b & 0xff) << 16) | \ + ((u32_t)(c & 0xff) << 8) | (u32_t)(d & 0xff)) + +#define ip_addr_set(dest, src) (dest)->addr = \ + ((src) == NULL? 0:\ + (src)->addr) +#define ip_addr_maskcmp(addr1, addr2, mask) (((addr1)->addr & \ + (mask)->addr) == \ + ((addr2)->addr & \ + (mask)->addr)) +#define ip_addr_cmp(addr1, addr2) ((addr1)->addr == (addr2)->addr) + +#define ip_addr_isany(addr1) ((addr1) == NULL || (addr1)->addr == 0) + +u8_t ip_addr_isbroadcast(struct ip_addr *, struct netif *); + +#define ip_addr_ismulticast(addr1) (((addr1)->addr & ntohl(0xf0000000)) == ntohl(0xe0000000)) + + +#define ip_addr_debug_print(debug, ipaddr) LWIP_DEBUGF(debug, ("%u.%u.%u.%u", \ + ipaddr?(unsigned int)(ntohl((ipaddr)->addr) >> 24) & 0xff:0, \ + ipaddr?(unsigned int)(ntohl((ipaddr)->addr) >> 16) & 0xff:0, \ + ipaddr?(unsigned int)(ntohl((ipaddr)->addr) >> 8) & 0xff:0, \ + ipaddr?(unsigned int)ntohl((ipaddr)->addr) & 0xff:0U)) + +/* cast to unsigned int, as it is used as argument to printf functions + * which expect integer arguments */ +#define ip4_addr1(ipaddr) ((unsigned int)(ntohl((ipaddr)->addr) >> 24) & 0xff) +#define ip4_addr2(ipaddr) ((unsigned int)(ntohl((ipaddr)->addr) >> 16) & 0xff) +#define ip4_addr3(ipaddr) ((unsigned int)(ntohl((ipaddr)->addr) >> 8) & 0xff) +#define ip4_addr4(ipaddr) ((unsigned int)(ntohl((ipaddr)->addr)) & 0xff) +#endif /* __LWIP_IP_ADDR_H__ */ + + + + + +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/ip_frag.h @@ -0,0 +1,46 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Jani Monoses <jani@iv.ro> + * + */ + +#ifndef __LWIP_IP_FRAG_H__ +#define __LWIP_IP_FRAG_H__ + +#include "lwip/err.h" +#include "lwip/pbuf.h" +#include "lwip/netif.h" +#include "lwip/ip_addr.h" + +struct pbuf * ip_reass(struct pbuf *); +err_t ip_frag(struct pbuf *, struct netif *, struct ip_addr *); + +#endif /* __LWIP_IP_FRAG_H__ */ + +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/mem.h @@ -0,0 +1,61 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ +#ifndef __LWIP_MEM_H__ +#define __LWIP_MEM_H__ + +#include "lwip/opt.h" +#include "lwip/arch.h" + +#if MEM_SIZE > 64000l +typedef u32_t mem_size_t; +#else +typedef u16_t mem_size_t; +#endif /* MEM_SIZE > 64000 */ + + +void mem_init(void); + +void *mem_malloc(mem_size_t size); +void mem_free(void *mem); +void *mem_realloc(void *mem, mem_size_t size); +void *mem_reallocm(void *mem, mem_size_t size); + +#ifndef MEM_ALIGN_SIZE +#define MEM_ALIGN_SIZE(size) (((size) + MEM_ALIGNMENT - 1) & ~(MEM_ALIGNMENT-1)) +#endif + +#ifndef MEM_ALIGN +#define MEM_ALIGN(addr) ((void *)(((mem_ptr_t)(addr) + MEM_ALIGNMENT - 1) & ~(mem_ptr_t)(MEM_ALIGNMENT-1))) +#endif + +#endif /* __LWIP_MEM_H__ */ +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/memp.h @@ -0,0 +1,63 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + +#ifndef __LWIP_MEMP_H__ +#define __LWIP_MEMP_H__ + +#include "lwip/opt.h" + +typedef enum { + MEMP_PBUF, + MEMP_RAW_PCB, + MEMP_UDP_PCB, + MEMP_TCP_PCB, + MEMP_TCP_PCB_LISTEN, + MEMP_TCP_SEG, + + MEMP_NETBUF, + MEMP_NETCONN, + MEMP_API_MSG, + MEMP_TCPIP_MSG, + + MEMP_SYS_TIMEOUT, + + MEMP_MAX +} memp_t; + +void memp_init(void); + +void *memp_malloc(memp_t type); +void *memp_realloc(memp_t fromtype, memp_t totype, void *mem); +void memp_free(memp_t type, void *mem); + +#endif /* __LWIP_MEMP_H__ */ +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/netif.h @@ -0,0 +1,143 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ +#ifndef __LWIP_NETIF_H__ +#define __LWIP_NETIF_H__ + +#include "lwip/opt.h" + +#include "lwip/err.h" + +#include "lwip/ip_addr.h" + +#include "lwip/inet.h" +#include "lwip/pbuf.h" +#if LWIP_DHCP +# include "lwip/dhcp.h" +#endif + +/** must be the maximum of all used hardware address lengths + across all types of interfaces in use */ +#define NETIF_MAX_HWADDR_LEN 6U + +/** TODO: define the use (where, when, whom) of netif flags */ + +/** whether the network interface is 'up'. this is + * a software flag used to control whether this network + * interface is enabled and processes traffic */ +#define NETIF_FLAG_UP 0x1U +/** if set, the netif has broadcast capability */ +#define NETIF_FLAG_BROADCAST 0x2U +/** if set, the netif is one end of a point-to-point connection */ +#define NETIF_FLAG_POINTTOPOINT 0x4U +/** if set, the interface is configured using DHCP */ +#define NETIF_FLAG_DHCP 0x08U +/** if set, the interface has an active link + * (set by the interface) */ +#define NETIF_FLAG_LINK_UP 0x10U + +/** generic data structure used for all lwIP network interfaces */ +struct netif { + /** pointer to next in linked list */ + struct netif *next; + /** The following fields should be filled in by the + initialization function for the device driver. */ + + /** IP address configuration in network byte order */ + struct ip_addr ip_addr; + struct ip_addr netmask; + struct ip_addr gw; + + /** This function is called by the network device driver + to pass a packet up the TCP/IP stack. */ + err_t (* input)(struct pbuf *p, struct netif *inp); + /** This function is called by the IP module when it wants + to send a packet on the interface. This function typically + first resolves the hardware address, then sends the packet. */ + err_t (* output)(struct netif *netif, struct pbuf *p, + struct ip_addr *ipaddr); + /** This function is called by the ARP module when it wants + to send a packet on the interface. This function outputs + the pbuf as-is on the link medium. */ + err_t (* linkoutput)(struct netif *netif, struct pbuf *p); + /** This field can be set by the device driver and could point + to state information for the device. */ + void *state; +#if LWIP_DHCP + /** the DHCP client state information for this netif */ + struct dhcp *dhcp; +#endif + /** number of bytes used in hwaddr */ + unsigned char hwaddr_len; + /** link level hardware address of this interface */ + unsigned char hwaddr[NETIF_MAX_HWADDR_LEN]; + /** maximum transfer unit (in bytes) */ + u16_t mtu; + /** descriptive abbreviation */ + char name[2]; + /** number of this interface */ + u8_t num; + /** NETIF_FLAG_* */ + u8_t flags; +}; + +/** The list of network interfaces. */ +extern struct netif *netif_list; +/** The default network interface. */ +extern struct netif *netif_default; + +/* netif_init() must be called first. */ +void netif_init(void); + +struct netif *netif_add(struct netif *netif, struct ip_addr *ipaddr, struct ip_addr *netmask, + struct ip_addr *gw, + void *state, + err_t (* init)(struct netif *netif), + err_t (* input)(struct pbuf *p, struct netif *netif)); + +void +netif_set_addr(struct netif *netif,struct ip_addr *ipaddr, struct ip_addr *netmask, + struct ip_addr *gw); +void netif_remove(struct netif * netif); + +/* Returns a network interface given its name. The name is of the form + "et0", where the first two letters are the "name" field in the + netif structure, and the digit is in the num field in the same + structure. */ +struct netif *netif_find(char *name); + +void netif_set_default(struct netif *netif); + +void netif_set_ipaddr(struct netif *netif, struct ip_addr *ipaddr); +void netif_set_netmask(struct netif *netif, struct ip_addr *netmast); +void netif_set_gw(struct netif *netif, struct ip_addr *gw); + +#endif /* __LWIP_NETIF_H__ */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/opt.h @@ -0,0 +1,663 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ +#ifndef __LWIP_OPT_H__ +#define __LWIP_OPT_H__ + +/* Include user defined options first */ +#include "lwipopts.h" +#include "lwip/debug.h" + +/* Define default values for unconfigured parameters. */ + +/* Platform specific locking */ + +/* + * enable SYS_LIGHTWEIGHT_PROT in lwipopts.h if you want inter-task protection + * for certain critical regions during buffer allocation, deallocation and memory + * allocation and deallocation. + */ +#ifndef SYS_LIGHTWEIGHT_PROT +#define SYS_LIGHTWEIGHT_PROT 0 +#endif + +#ifndef NO_SYS +#define NO_SYS 0 +#endif +/* ---------- Memory options ---------- */ +/* MEM_ALIGNMENT: should be set to the alignment of the CPU for which + lwIP is compiled. 4 byte alignment -> define MEM_ALIGNMENT to 4, 2 + byte alignment -> define MEM_ALIGNMENT to 2. */ + +#ifndef MEM_ALIGNMENT +#define MEM_ALIGNMENT 1 +#endif + +/* MEM_SIZE: the size of the heap memory. If the application will send +a lot of data that needs to be copied, this should be set high. */ +#ifndef MEM_SIZE +#define MEM_SIZE 1600 +#endif + +#ifndef MEMP_SANITY_CHECK +#define MEMP_SANITY_CHECK 0 +#endif + +/* MEMP_NUM_PBUF: the number of memp struct pbufs. If the application + sends a lot of data out of ROM (or other static memory), this + should be set high. */ +#ifndef MEMP_NUM_PBUF +#define MEMP_NUM_PBUF 16 +#endif + +/* Number of raw connection PCBs */ +#ifndef MEMP_NUM_RAW_PCB +#define MEMP_NUM_RAW_PCB 4 +#endif + +/* MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One + per active UDP "connection". */ +#ifndef MEMP_NUM_UDP_PCB +#define MEMP_NUM_UDP_PCB 4 +#endif +/* MEMP_NUM_TCP_PCB: the number of simulatenously active TCP + connections. */ +#ifndef MEMP_NUM_TCP_PCB +#define MEMP_NUM_TCP_PCB 5 +#endif +/* MEMP_NUM_TCP_PCB_LISTEN: the number of listening TCP + connections. */ +#ifndef MEMP_NUM_TCP_PCB_LISTEN +#define MEMP_NUM_TCP_PCB_LISTEN 8 +#endif +/* MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP + segments. */ +#ifndef MEMP_NUM_TCP_SEG +#define MEMP_NUM_TCP_SEG 16 +#endif +/* MEMP_NUM_SYS_TIMEOUT: the number of simulateously active + timeouts. */ +#ifndef MEMP_NUM_SYS_TIMEOUT +#define MEMP_NUM_SYS_TIMEOUT 3 +#endif + +/* The following four are used only with the sequential API and can be + set to 0 if the application only will use the raw API. */ +/* MEMP_NUM_NETBUF: the number of struct netbufs. */ +#ifndef MEMP_NUM_NETBUF +#define MEMP_NUM_NETBUF 2 +#endif +/* MEMP_NUM_NETCONN: the number of struct netconns. */ +#ifndef MEMP_NUM_NETCONN +#define MEMP_NUM_NETCONN 4 +#endif +/* MEMP_NUM_APIMSG: the number of struct api_msg, used for + communication between the TCP/IP stack and the sequential + programs. */ +#ifndef MEMP_NUM_API_MSG +#define MEMP_NUM_API_MSG 8 +#endif +/* MEMP_NUM_TCPIPMSG: the number of struct tcpip_msg, which is used + for sequential API communication and incoming packets. Used in + src/api/tcpip.c. */ +#ifndef MEMP_NUM_TCPIP_MSG +#define MEMP_NUM_TCPIP_MSG 8 +#endif + +/* ---------- Pbuf options ---------- */ +/* PBUF_POOL_SIZE: the number of buffers in the pbuf pool. */ + +#ifndef PBUF_POOL_SIZE +#define PBUF_POOL_SIZE 16 +#endif + +/* PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. */ + +#ifndef PBUF_POOL_BUFSIZE +#define PBUF_POOL_BUFSIZE 128 +#endif + +/* PBUF_LINK_HLEN: the number of bytes that should be allocated for a + link level header. */ + +#ifndef PBUF_LINK_HLEN +#define PBUF_LINK_HLEN 0 +#endif + + + +/* ---------- ARP options ---------- */ + +/** Number of active hardware address, IP address pairs cached */ +#ifndef ARP_TABLE_SIZE +#define ARP_TABLE_SIZE 10 +#endif + +/** + * If enabled, outgoing packets are queued during hardware address + * resolution. The etharp.c implementation queues 1 packet only. + */ +#ifndef ARP_QUEUEING +#define ARP_QUEUEING 1 +#endif +/** If enabled, the first packet queued will not be overwritten by + * later packets. If disabled, later packets overwrite early packets + * in the queue. Default is disabled, which is recommended. + */ +#ifndef ARP_QUEUE_FIRST +#define ARP_QUEUE_FIRST 0 +#endif + +/* This option is removed to comply with the ARP standard */ +#ifdef ETHARP_ALWAYS_INSERT +#error ETHARP_ALWAYS_INSERT option is deprecated. Remove it from your lwipopts.h. +#endif + +/* ---------- IP options ---------- */ +/* Define IP_FORWARD to 1 if you wish to have the ability to forward + IP packets across network interfaces. If you are going to run lwIP + on a device with only one network interface, define this to 0. */ +#ifndef IP_FORWARD +#define IP_FORWARD 0 +#endif + +/* If defined to 1, IP options are allowed (but not parsed). If + defined to 0, all packets with IP options are dropped. */ +#ifndef IP_OPTIONS +#define IP_OPTIONS 1 +#endif + +/** IP reassembly and segmentation. Even if they both deal with IP + * fragments, note that these are orthogonal, one dealing with incoming + * packets, the other with outgoing packets + */ + +/** Reassemble incoming fragmented IP packets */ +#ifndef IP_REASSEMBLY +#define IP_REASSEMBLY 1 +#endif + +/** Fragment outgoing IP packets if their size exceeds MTU */ +#ifndef IP_FRAG +#define IP_FRAG 1 +#endif + +/* ---------- ICMP options ---------- */ + +#ifndef ICMP_TTL +#define ICMP_TTL 255 +#endif + +/* ---------- RAW options ---------- */ + +#ifndef LWIP_RAW +#define LWIP_RAW 1 +#endif + +#ifndef RAW_TTL +#define RAW_TTL 255 +#endif + +/* ---------- DHCP options ---------- */ + +#ifndef LWIP_DHCP +#define LWIP_DHCP 0 +#endif + +/* 1 if you want to do an ARP check on the offered address + (recommended). */ +#ifndef DHCP_DOES_ARP_CHECK +#define DHCP_DOES_ARP_CHECK 1 +#endif + +/* ---------- UDP options ---------- */ +#ifndef LWIP_UDP +#define LWIP_UDP 1 +#endif + +#ifndef UDP_TTL +#define UDP_TTL 255 +#endif + +/* ---------- TCP options ---------- */ +#ifndef LWIP_TCP +#define LWIP_TCP 1 +#endif + +#ifndef TCP_TTL +#define TCP_TTL 255 +#endif + +#ifndef TCP_WND +#define TCP_WND 2048 +#endif + +#ifndef TCP_MAXRTX +#define TCP_MAXRTX 12 +#endif + +#ifndef TCP_SYNMAXRTX +#define TCP_SYNMAXRTX 6 +#endif + + +/* Controls if TCP should queue segments that arrive out of + order. Define to 0 if your device is low on memory. */ +#ifndef TCP_QUEUE_OOSEQ +#define TCP_QUEUE_OOSEQ 1 +#endif + +/* TCP Maximum segment size. */ +#ifndef TCP_MSS +#define TCP_MSS 128 /* A *very* conservative default. */ +#endif + +/* TCP sender buffer space (bytes). */ +#ifndef TCP_SND_BUF +#define TCP_SND_BUF 256 +#endif + +/* TCP sender buffer space (pbufs). This must be at least = 2 * + TCP_SND_BUF/TCP_MSS for things to work. */ +#ifndef TCP_SND_QUEUELEN +#define TCP_SND_QUEUELEN 4 * TCP_SND_BUF/TCP_MSS +#endif + + +/* Maximum number of retransmissions of data segments. */ + +/* Maximum number of retransmissions of SYN segments. */ + +/* TCP writable space (bytes). This must be less than or equal + to TCP_SND_BUF. It is the amount of space which must be + available in the tcp snd_buf for select to return writable */ +#ifndef TCP_SNDLOWAT +#define TCP_SNDLOWAT TCP_SND_BUF/2 +#endif + +/* Support loop interface (127.0.0.1) */ +#ifndef LWIP_HAVE_LOOPIF +#define LWIP_HAVE_LOOPIF 1 +#endif + +#ifndef LWIP_EVENT_API +#define LWIP_EVENT_API 0 +#define LWIP_CALLBACK_API 1 +#else +#define LWIP_EVENT_API 1 +#define LWIP_CALLBACK_API 0 +#endif + +#ifndef LWIP_COMPAT_SOCKETS +#define LWIP_COMPAT_SOCKETS 1 +#endif + + +#ifndef TCPIP_THREAD_PRIO +#define TCPIP_THREAD_PRIO 1 +#endif + +#ifndef SLIPIF_THREAD_PRIO +#define SLIPIF_THREAD_PRIO 1 +#endif + +#ifndef PPP_THREAD_PRIO +#define PPP_THREAD_PRIO 1 +#endif + +#ifndef DEFAULT_THREAD_PRIO +#define DEFAULT_THREAD_PRIO 1 +#endif + + +/* ---------- Socket Options ---------- */ +/* Enable SO_REUSEADDR and SO_REUSEPORT options */ +#ifndef SO_REUSE +# define SO_REUSE 1 +#endif + + +/* ---------- Statistics options ---------- */ +#ifndef LWIP_STATS +#define LWIP_STATS 1 +#endif + +#if LWIP_STATS + +#ifndef LWIP_STATS_DISPLAY +#define LWIP_STATS_DISPLAY 0 +#endif + +#ifndef LINK_STATS +#define LINK_STATS 1 +#endif + +#ifndef IP_STATS +#define IP_STATS 1 +#endif + +#ifndef IPFRAG_STATS +#define IPFRAG_STATS 1 +#endif + +#ifndef ICMP_STATS +#define ICMP_STATS 1 +#endif + +#ifndef UDP_STATS +#define UDP_STATS 1 +#endif + +#ifndef TCP_STATS +#define TCP_STATS 1 +#endif + +#ifndef MEM_STATS +#define MEM_STATS 1 +#endif + +#ifndef MEMP_STATS +#define MEMP_STATS 1 +#endif + +#ifndef PBUF_STATS +#define PBUF_STATS 1 +#endif + +#ifndef SYS_STATS +#define SYS_STATS 1 +#endif + +#ifndef RAW_STATS +#define RAW_STATS 0 +#endif + +#else + +#define LINK_STATS 0 +#define IP_STATS 0 +#define IPFRAG_STATS 0 +#define ICMP_STATS 0 +#define UDP_STATS 0 +#define TCP_STATS 0 +#define MEM_STATS 0 +#define MEMP_STATS 0 +#define PBUF_STATS 0 +#define SYS_STATS 0 +#define RAW_STATS 0 +#define LWIP_STATS_DISPLAY 0 + +#endif /* LWIP_STATS */ + +/* ---------- PPP options ---------- */ + +#ifndef PPP_SUPPORT +#define PPP_SUPPORT 0 /* Set for PPP */ +#endif + +#if PPP_SUPPORT + +#define NUM_PPP 1 /* Max PPP sessions. */ + + + +#ifndef PAP_SUPPORT +#define PAP_SUPPORT 0 /* Set for PAP. */ +#endif + +#ifndef CHAP_SUPPORT +#define CHAP_SUPPORT 0 /* Set for CHAP. */ +#endif + +#define MSCHAP_SUPPORT 0 /* Set for MSCHAP (NOT FUNCTIONAL!) */ +#define CBCP_SUPPORT 0 /* Set for CBCP (NOT FUNCTIONAL!) */ +#define CCP_SUPPORT 0 /* Set for CCP (NOT FUNCTIONAL!) */ + +#ifndef VJ_SUPPORT +#define VJ_SUPPORT 0 /* Set for VJ header compression. */ +#endif + +#ifndef MD5_SUPPORT +#define MD5_SUPPORT 0 /* Set for MD5 (see also CHAP) */ +#endif + + +/* + * Timeouts. + */ +#define FSM_DEFTIMEOUT 6 /* Timeout time in seconds */ +#define FSM_DEFMAXTERMREQS 2 /* Maximum Terminate-Request transmissions */ +#define FSM_DEFMAXCONFREQS 10 /* Maximum Configure-Request transmissions */ +#define FSM_DEFMAXNAKLOOPS 5 /* Maximum number of nak loops */ + +#define UPAP_DEFTIMEOUT 6 /* Timeout (seconds) for retransmitting req */ +#define UPAP_DEFREQTIME 30 /* Time to wait for auth-req from peer */ + +#define CHAP_DEFTIMEOUT 6 /* Timeout time in seconds */ +#define CHAP_DEFTRANSMITS 10 /* max # times to send challenge */ + + +/* Interval in seconds between keepalive echo requests, 0 to disable. */ +#if 1 +#define LCP_ECHOINTERVAL 0 +#else +#define LCP_ECHOINTERVAL 10 +#endif + +/* Number of unanswered echo requests before failure. */ +#define LCP_MAXECHOFAILS 3 + +/* Max Xmit idle time (in jiffies) before resend flag char. */ +#define PPP_MAXIDLEFLAG 100 + +/* + * Packet sizes + * + * Note - lcp shouldn't be allowed to negotiate stuff outside these + * limits. See lcp.h in the pppd directory. + * (XXX - these constants should simply be shared by lcp.c instead + * of living in lcp.h) + */ +#define PPP_MTU 1500 /* Default MTU (size of Info field) */ +#if 0 +#define PPP_MAXMTU 65535 - (PPP_HDRLEN + PPP_FCSLEN) +#else +#define PPP_MAXMTU 1500 /* Largest MTU we allow */ +#endif +#define PPP_MINMTU 64 +#define PPP_MRU 1500 /* default MRU = max length of info field */ +#define PPP_MAXMRU 1500 /* Largest MRU we allow */ +#define PPP_DEFMRU 296 /* Try for this */ +#define PPP_MINMRU 128 /* No MRUs below this */ + + +#define MAXNAMELEN 256 /* max length of hostname or name for auth */ +#define MAXSECRETLEN 256 /* max length of password or secret */ + +#endif /* PPP_SUPPORT */ + +/* checksum options - set to zero for hardware checksum support */ + +#ifndef CHECKSUM_GEN_IP +#define CHECKSUM_GEN_IP 1 +#endif + +#ifndef CHECKSUM_GEN_UDP +#define CHECKSUM_GEN_UDP 1 +#endif + +#ifndef CHECKSUM_GEN_TCP +#define CHECKSUM_GEN_TCP 1 +#endif + +#ifndef CHECKSUM_CHECK_IP +#define CHECKSUM_CHECK_IP 1 +#endif + +#ifndef CHECKSUM_CHECK_UDP +#define CHECKSUM_CHECK_UDP 1 +#endif + +#ifndef CHECKSUM_CHECK_TCP +#define CHECKSUM_CHECK_TCP 1 +#endif + +/* Debugging options all default to off */ + +#ifndef DBG_TYPES_ON +#define DBG_TYPES_ON 0 +#endif + +#ifndef ETHARP_DEBUG +#define ETHARP_DEBUG DBG_OFF +#endif + +#ifndef NETIF_DEBUG +#define NETIF_DEBUG DBG_OFF +#endif + +#ifndef PBUF_DEBUG +#define PBUF_DEBUG DBG_OFF +#endif + +#ifndef API_LIB_DEBUG +#define API_LIB_DEBUG DBG_OFF +#endif + +#ifndef API_MSG_DEBUG +#define API_MSG_DEBUG DBG_OFF +#endif + +#ifndef SOCKETS_DEBUG +#define SOCKETS_DEBUG DBG_OFF +#endif + +#ifndef ICMP_DEBUG +#define ICMP_DEBUG DBG_OFF +#endif + +#ifndef INET_DEBUG +#define INET_DEBUG DBG_OFF +#endif + +#ifndef IP_DEBUG +#define IP_DEBUG DBG_OFF +#endif + +#ifndef IP_REASS_DEBUG +#define IP_REASS_DEBUG DBG_OFF +#endif + +#ifndef RAW_DEBUG +#define RAW_DEBUG DBG_OFF +#endif + +#ifndef MEM_DEBUG +#define MEM_DEBUG DBG_OFF +#endif + +#ifndef MEMP_DEBUG +#define MEMP_DEBUG DBG_OFF +#endif + +#ifndef SYS_DEBUG +#define SYS_DEBUG DBG_OFF +#endif + +#ifndef TCP_DEBUG +#define TCP_DEBUG DBG_OFF +#endif + +#ifndef TCP_INPUT_DEBUG +#define TCP_INPUT_DEBUG DBG_OFF +#endif + +#ifndef TCP_FR_DEBUG +#define TCP_FR_DEBUG DBG_OFF +#endif + +#ifndef TCP_RTO_DEBUG +#define TCP_RTO_DEBUG DBG_OFF +#endif + +#ifndef TCP_REXMIT_DEBUG +#define TCP_REXMIT_DEBUG DBG_OFF +#endif + +#ifndef TCP_CWND_DEBUG +#define TCP_CWND_DEBUG DBG_OFF +#endif + +#ifndef TCP_WND_DEBUG +#define TCP_WND_DEBUG DBG_OFF +#endif + +#ifndef TCP_OUTPUT_DEBUG +#define TCP_OUTPUT_DEBUG DBG_OFF +#endif + +#ifndef TCP_RST_DEBUG +#define TCP_RST_DEBUG DBG_OFF +#endif + +#ifndef TCP_QLEN_DEBUG +#define TCP_QLEN_DEBUG DBG_OFF +#endif + +#ifndef UDP_DEBUG +#define UDP_DEBUG DBG_OFF +#endif + +#ifndef TCPIP_DEBUG +#define TCPIP_DEBUG DBG_OFF +#endif + +#ifndef PPP_DEBUG +#define PPP_DEBUG DBG_OFF +#endif + +#ifndef SLIP_DEBUG +#define SLIP_DEBUG DBG_OFF +#endif + +#ifndef DHCP_DEBUG +#define DHCP_DEBUG DBG_OFF +#endif + + +#ifndef DBG_MIN_LEVEL +#define DBG_MIN_LEVEL DBG_LEVEL_OFF +#endif + +#endif /* __LWIP_OPT_H__ */ + + +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/pbuf.h @@ -0,0 +1,118 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + +#ifndef __LWIP_PBUF_H__ +#define __LWIP_PBUF_H__ + +#include "arch/cc.h" + + +#define PBUF_TRANSPORT_HLEN 20 +#define PBUF_IP_HLEN 20 + +typedef enum { + PBUF_TRANSPORT, + PBUF_IP, + PBUF_LINK, + PBUF_RAW +} pbuf_layer; + +typedef enum { + PBUF_RAM, + PBUF_ROM, + PBUF_REF, + PBUF_POOL +} pbuf_flag; + +/* Definitions for the pbuf flag field (these are not the flags that + are passed to pbuf_alloc()). */ +#define PBUF_FLAG_RAM 0x00U /* Flags that pbuf data is stored in RAM */ +#define PBUF_FLAG_ROM 0x01U /* Flags that pbuf data is stored in ROM */ +#define PBUF_FLAG_POOL 0x02U /* Flags that the pbuf comes from the pbuf pool */ +#define PBUF_FLAG_REF 0x04U /* Flags thet the pbuf payload refers to RAM */ + +/** indicates this packet was broadcast on the link */ +#define PBUF_FLAG_LINK_BROADCAST 0x80U + +struct pbuf { + /** next pbuf in singly linked pbuf chain */ + struct pbuf *next; + + /** pointer to the actual data in the buffer */ + void *payload; + + /** + * total length of this buffer and all next buffers in chain + * belonging to the same packet. + * + * For non-queue packet chains this is the invariant: + * p->tot_len == p->len + (p->next? p->next->tot_len: 0) + */ + u16_t tot_len; + + /* length of this buffer */ + u16_t len; + + /* flags telling the type of pbuf */ + u16_t flags; + + /** + * the reference count always equals the number of pointers + * that refer to this pbuf. This can be pointers from an application, + * the stack itself, or pbuf->next pointers from a chain. + */ + u16_t ref; + +}; + +/* pbuf_init(): + + Initializes the pbuf module. The num parameter determines how many + pbufs that should be allocated to the pbuf pool, and the size + parameter specifies the size of the data allocated to those. */ +void pbuf_init(void); + +struct pbuf *pbuf_alloc(pbuf_layer l, u16_t size, pbuf_flag flag); +void pbuf_realloc(struct pbuf *p, u16_t size); +u8_t pbuf_header(struct pbuf *p, s16_t header_size); +void pbuf_ref(struct pbuf *p); +void pbuf_ref_chain(struct pbuf *p); +u8_t pbuf_free(struct pbuf *p); +u8_t pbuf_clen(struct pbuf *p); +void pbuf_cat(struct pbuf *h, struct pbuf *t); +void pbuf_chain(struct pbuf *h, struct pbuf *t); +struct pbuf *pbuf_take(struct pbuf *f); +struct pbuf *pbuf_dechain(struct pbuf *p); +void pbuf_queue(struct pbuf *p, struct pbuf *n); +struct pbuf * pbuf_dequeue(struct pbuf *p); + +#endif /* __LWIP_PBUF_H__ */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/raw.h @@ -0,0 +1,74 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ +#ifndef __LWIP_RAW_H__ +#define __LWIP_RAW_H__ + +#include "lwip/arch.h" + +#include "lwip/pbuf.h" +#include "lwip/inet.h" +#include "lwip/ip.h" + +struct raw_pcb { +/* Common members of all PCB types */ + IP_PCB; + + struct raw_pcb *next; + + u16_t protocol; + + int (* recv)(void *arg, struct raw_pcb *pcb, struct pbuf *p, + struct ip_addr *addr); + void *recv_arg; +}; + +/* The following functions is the application layer interface to the + RAW code. */ +struct raw_pcb * raw_new (u16_t proto); +void raw_remove (struct raw_pcb *pcb); +err_t raw_bind (struct raw_pcb *pcb, struct ip_addr *ipaddr); +err_t raw_connect (struct raw_pcb *pcb, struct ip_addr *ipaddr); + +void raw_recv (struct raw_pcb *pcb, + int (* recv)(void *arg, struct raw_pcb *pcb, + struct pbuf *p, + struct ip_addr *addr), + void *recv_arg); +err_t raw_send_to (struct raw_pcb *pcb, struct pbuf *p, struct ip_addr *ipaddr); +err_t raw_send (struct raw_pcb *pcb, struct pbuf *p); + +/* The following functions are the lower layer interface to RAW. */ +int raw_input (struct pbuf *p, struct netif *inp); +void raw_init (void); + + +#endif /* __LWIP_RAW_H__ */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/sio.h @@ -0,0 +1,63 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + */ + +/* + * This is the interface to the platform specific serial IO module + * It needs to be implemented by those platforms which need SLIP or PPP + */ + +#include "arch/cc.h" + +#ifndef __sio_fd_t_defined +typedef void * sio_fd_t; +#endif + +#ifndef sio_open +sio_fd_t sio_open(u8_t); +#endif + +#ifndef sio_send +void sio_send(u8_t, sio_fd_t); +#endif + +#ifndef sio_recv +u8_t sio_recv(sio_fd_t); +#endif + +#ifndef sio_read +u32_t sio_read(sio_fd_t, u8_t *, u32_t); +#endif + +#ifndef sio_write +u32_t sio_write(sio_fd_t, u8_t *, u32_t); +#endif + +#ifndef sio_read_abort +void sio_read_abort(sio_fd_t); +#endif
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/snmp.h @@ -0,0 +1,178 @@ +/* + * Copyright (c) 2001, 2002 Leon Woestenberg <leon.woestenberg@axon.tv> + * Copyright (c) 2001, 2002 Axon Digital Design B.V., The Netherlands. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Leon Woestenberg <leon.woestenberg@axon.tv> + * + */ +#ifndef __LWIP_SNMP_H__ +#define __LWIP_SNMP_H__ + +#include "lwip/opt.h" + +/* SNMP support available? */ +#if defined(LWIP_SNMP) && (LWIP_SNMP > 0) + +/* network interface */ +void snmp_add_ifinoctets(unsigned long value); +void snmp_inc_ifinucastpkts(void); +void snmp_inc_ifinnucastpkts(void); +void snmp_inc_ifindiscards(void); +void snmp_add_ifoutoctets(unsigned long value); +void snmp_inc_ifoutucastpkts(void); +void snmp_inc_ifoutnucastpkts(void); +void snmp_inc_ifoutdiscards(void); + +/* IP */ +void snmp_inc_ipinreceives(void); +void snmp_inc_ipindelivers(void); +void snmp_inc_ipindiscards(void); +void snmp_inc_ipoutdiscards(void); +void snmp_inc_ipoutrequests(void); +void snmp_inc_ipunknownprotos(void); +void snmp_inc_ipnoroutes(void); +void snmp_inc_ipforwdatagrams(void); + +/* ICMP */ +void snmp_inc_icmpinmsgs(void); +void snmp_inc_icmpinerrors(void); +void snmp_inc_icmpindestunreachs(void); +void snmp_inc_icmpintimeexcds(void); +void snmp_inc_icmpinparmprobs(void); +void snmp_inc_icmpinsrcquenchs(void); +void snmp_inc_icmpinredirects(void); +void snmp_inc_icmpinechos(void); +void snmp_inc_icmpinechoreps(void); +void snmp_inc_icmpintimestamps(void); +void snmp_inc_icmpintimestampreps(void); +void snmp_inc_icmpinaddrmasks(void); +void snmp_inc_icmpinaddrmaskreps(void); +void snmp_inc_icmpoutmsgs(void); +void snmp_inc_icmpouterrors(void); +void snmp_inc_icmpoutdestunreachs(void); +void snmp_inc_icmpouttimeexcds(void); +void snmp_inc_icmpoutparmprobs(void); +void snmp_inc_icmpoutsrcquenchs(void); +void snmp_inc_icmpoutredirects(void); +void snmp_inc_icmpoutechos(void); +void snmp_inc_icmpoutechoreps(void); +void snmp_inc_icmpouttimestamps(void); +void snmp_inc_icmpouttimestampreps(void); +void snmp_inc_icmpoutaddrmasks(void); +void snmp_inc_icmpoutaddrmaskreps(void); + +/* TCP */ +void snmp_inc_tcpactiveopens(void); +void snmp_inc_tcppassiveopens(void); +void snmp_inc_tcpattemptfails(void); +void snmp_inc_tcpestabresets(void); +void snmp_inc_tcpcurrestab(void); +void snmp_inc_tcpinsegs(void); +void snmp_inc_tcpoutsegs(void); +void snmp_inc_tcpretranssegs(void); +void snmp_inc_tcpinerrs(void); +void snmp_inc_tcpoutrsts(void); + +/* UDP */ +void snmp_inc_udpindatagrams(void); +void snmp_inc_udpnoports(void); +void snmp_inc_udpinerrors(void); +void snmp_inc_udpoutdatagrams(void); + +/* LWIP_SNMP support not available */ +/* define everything to be empty */ +#else + +/* network interface */ +#define snmp_add_ifinoctets(value) +#define snmp_inc_ifinucastpkts() +#define snmp_inc_ifinnucastpkts() +#define snmp_inc_ifindiscards() +#define snmp_add_ifoutoctets(value) +#define snmp_inc_ifoutucastpkts() +#define snmp_inc_ifoutnucastpkts() +#define snmp_inc_ifoutdiscards() + +/* IP */ +#define snmp_inc_ipinreceives() +#define snmp_inc_ipindelivers() +#define snmp_inc_ipindiscards() +#define snmp_inc_ipoutdiscards() +#define snmp_inc_ipoutrequests() +#define snmp_inc_ipunknownprotos() +#define snmp_inc_ipnoroutes() +#define snmp_inc_ipforwdatagrams() + +/* ICMP */ +#define snmp_inc_icmpinmsgs() +#define snmp_inc_icmpinerrors() +#define snmp_inc_icmpindestunreachs() +#define snmp_inc_icmpintimeexcds() +#define snmp_inc_icmpinparmprobs() +#define snmp_inc_icmpinsrcquenchs() +#define snmp_inc_icmpinredirects() +#define snmp_inc_icmpinechos() +#define snmp_inc_icmpinechoreps() +#define snmp_inc_icmpintimestamps() +#define snmp_inc_icmpintimestampreps() +#define snmp_inc_icmpinaddrmasks() +#define snmp_inc_icmpinaddrmaskreps() +#define snmp_inc_icmpoutmsgs() +#define snmp_inc_icmpouterrors() +#define snmp_inc_icmpoutdestunreachs() +#define snmp_inc_icmpouttimeexcds() +#define snmp_inc_icmpoutparmprobs() +#define snmp_inc_icmpoutsrcquenchs() +#define snmp_inc_icmpoutredirects() +#define snmp_inc_icmpoutechos() +#define snmp_inc_icmpoutechoreps() +#define snmp_inc_icmpouttimestamps() +#define snmp_inc_icmpouttimestampreps() +#define snmp_inc_icmpoutaddrmasks() +#define snmp_inc_icmpoutaddrmaskreps() +/* TCP */ +#define snmp_inc_tcpactiveopens() +#define snmp_inc_tcppassiveopens() +#define snmp_inc_tcpattemptfails() +#define snmp_inc_tcpestabresets() +#define snmp_inc_tcpcurrestab() +#define snmp_inc_tcpinsegs() +#define snmp_inc_tcpoutsegs() +#define snmp_inc_tcpretranssegs() +#define snmp_inc_tcpinerrs() +#define snmp_inc_tcpoutrsts() + +/* UDP */ +#define snmp_inc_udpindatagrams() +#define snmp_inc_udpnoports() +#define snmp_inc_udpinerrors() +#define snmp_inc_udpoutdatagrams() + +#endif + +#endif /* __LWIP_SNMP_H__ */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/sockets.h @@ -0,0 +1,267 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + + +#ifndef __LWIP_SOCKETS_H__ +#define __LWIP_SOCKETS_H__ +#include "lwip/ip_addr.h" + +struct sockaddr_in { + u8_t sin_len; + u8_t sin_family; + u16_t sin_port; + struct in_addr sin_addr; + char sin_zero[8]; +}; + +struct sockaddr { + u8_t sa_len; + u8_t sa_family; + char sa_data[14]; +}; + +#ifndef socklen_t +# define socklen_t int +#endif + + +#define SOCK_STREAM 1 +#define SOCK_DGRAM 2 +#define SOCK_RAW 3 + +/* + * Option flags per-socket. + */ +#define SO_DEBUG 0x0001 /* turn on debugging info recording */ +#define SO_ACCEPTCONN 0x0002 /* socket has had listen() */ +#define SO_REUSEADDR 0x0004 /* allow local address reuse */ +#define SO_KEEPALIVE 0x0008 /* keep connections alive */ +#define SO_DONTROUTE 0x0010 /* just use interface addresses */ +#define SO_BROADCAST 0x0020 /* permit sending of broadcast msgs */ +#define SO_USELOOPBACK 0x0040 /* bypass hardware when possible */ +#define SO_LINGER 0x0080 /* linger on close if data present */ +#define SO_OOBINLINE 0x0100 /* leave received OOB data in line */ +#define SO_REUSEPORT 0x0200 /* allow local address & port reuse */ + +#define SO_DONTLINGER (int)(~SO_LINGER) + +/* + * Additional options, not kept in so_options. + */ +#define SO_SNDBUF 0x1001 /* send buffer size */ +#define SO_RCVBUF 0x1002 /* receive buffer size */ +#define SO_SNDLOWAT 0x1003 /* send low-water mark */ +#define SO_RCVLOWAT 0x1004 /* receive low-water mark */ +#define SO_SNDTIMEO 0x1005 /* send timeout */ +#define SO_RCVTIMEO 0x1006 /* receive timeout */ +#define SO_ERROR 0x1007 /* get error status and clear */ +#define SO_TYPE 0x1008 /* get socket type */ + + + +/* + * Structure used for manipulating linger option. + */ +struct linger { + int l_onoff; /* option on/off */ + int l_linger; /* linger time */ +}; + +/* + * Level number for (get/set)sockopt() to apply to socket itself. + */ +#define SOL_SOCKET 0xfff /* options for socket level */ + + +#define AF_UNSPEC 0 +#define AF_INET 2 +#define PF_INET AF_INET +#define PF_UNSPEC AF_UNSPEC + +#define IPPROTO_IP 0 +#define IPPROTO_TCP 6 +#define IPPROTO_UDP 17 + +#define INADDR_ANY 0 +#define INADDR_BROADCAST 0xffffffff + +/* Flags we can use with send and recv. */ +#define MSG_DONTWAIT 0x40 /* Nonblocking i/o for this operation only */ + + +/* + * Options for level IPPROTO_IP + */ +#define IP_TOS 1 +#define IP_TTL 2 + + +#define IPTOS_TOS_MASK 0x1E +#define IPTOS_TOS(tos) ((tos) & IPTOS_TOS_MASK) +#define IPTOS_LOWDELAY 0x10 +#define IPTOS_THROUGHPUT 0x08 +#define IPTOS_RELIABILITY 0x04 +#define IPTOS_LOWCOST 0x02 +#define IPTOS_MINCOST IPTOS_LOWCOST + +/* + * Definitions for IP precedence (also in ip_tos) (hopefully unused) + */ +#define IPTOS_PREC_MASK 0xe0 +#define IPTOS_PREC(tos) ((tos) & IPTOS_PREC_MASK) +#define IPTOS_PREC_NETCONTROL 0xe0 +#define IPTOS_PREC_INTERNETCONTROL 0xc0 +#define IPTOS_PREC_CRITIC_ECP 0xa0 +#define IPTOS_PREC_FLASHOVERRIDE 0x80 +#define IPTOS_PREC_FLASH 0x60 +#define IPTOS_PREC_IMMEDIATE 0x40 +#define IPTOS_PREC_PRIORITY 0x20 +#define IPTOS_PREC_ROUTINE 0x00 + + +/* + * Commands for ioctlsocket(), taken from the BSD file fcntl.h. + * + * + * Ioctl's have the command encoded in the lower word, + * and the size of any in or out parameters in the upper + * word. The high 2 bits of the upper word are used + * to encode the in/out status of the parameter; for now + * we restrict parameters to at most 128 bytes. + */ +#if !defined(FIONREAD) || !defined(FIONBIO) +#define IOCPARM_MASK 0x7f /* parameters must be < 128 bytes */ +#define IOC_VOID 0x20000000 /* no parameters */ +#define IOC_OUT 0x40000000 /* copy out parameters */ +#define IOC_IN 0x80000000 /* copy in parameters */ +#define IOC_INOUT (IOC_IN|IOC_OUT) + /* 0x20000000 distinguishes new & + old ioctl's */ +#define _IO(x,y) (IOC_VOID|((x)<<8)|(y)) + +#define _IOR(x,y,t) (IOC_OUT|(((long)sizeof(t)&IOCPARM_MASK)<<16)|((x)<<8)|(y)) + +#define _IOW(x,y,t) (IOC_IN|(((long)sizeof(t)&IOCPARM_MASK)<<16)|((x)<<8)|(y)) +#endif + +#ifndef FIONREAD +#define FIONREAD _IOR('f', 127, unsigned long) /* get # bytes to read */ +#endif +#ifndef FIONBIO +#define FIONBIO _IOW('f', 126, unsigned long) /* set/clear non-blocking i/o */ +#endif + +/* Socket I/O Controls */ +#ifndef SIOCSHIWAT +#define SIOCSHIWAT _IOW('s', 0, unsigned long) /* set high watermark */ +#define SIOCGHIWAT _IOR('s', 1, unsigned long) /* get high watermark */ +#define SIOCSLOWAT _IOW('s', 2, unsigned long) /* set low watermark */ +#define SIOCGLOWAT _IOR('s', 3, unsigned long) /* get low watermark */ +#define SIOCATMARK _IOR('s', 7, unsigned long) /* at oob mark? */ +#endif + +#ifndef O_NONBLOCK +#define O_NONBLOCK 04000U +#endif + +#ifndef FD_SET + #undef FD_SETSIZE + #define FD_SETSIZE 16 + #define FD_SET(n, p) ((p)->fd_bits[(n)/8] |= (1 << ((n) & 7))) + #define FD_CLR(n, p) ((p)->fd_bits[(n)/8] &= ~(1 << ((n) & 7))) + #define FD_ISSET(n,p) ((p)->fd_bits[(n)/8] & (1 << ((n) & 7))) + #define FD_ZERO(p) memset((void*)(p),0,sizeof(*(p))) + + typedef struct fd_set { + unsigned char fd_bits [(FD_SETSIZE+7)/8]; + } fd_set; + +/* + * only define this in sockets.c so it does not interfere + * with other projects namespaces where timeval is present + */ +#ifdef LWIP_TIMEVAL_PRIVATE + struct timeval { + long tv_sec; /* seconds */ + long tv_usec; /* and microseconds */ + }; +#endif + +#endif + +int lwip_accept(int s, struct sockaddr *addr, socklen_t *addrlen); +int lwip_bind(int s, struct sockaddr *name, socklen_t namelen); +int lwip_shutdown(int s, int how); +int lwip_getpeername (int s, struct sockaddr *name, socklen_t *namelen); +int lwip_getsockname (int s, struct sockaddr *name, socklen_t *namelen); +int lwip_getsockopt (int s, int level, int optname, void *optval, socklen_t *optlen); +int lwip_setsockopt (int s, int level, int optname, const void *optval, socklen_t optlen); +int lwip_close(int s); +int lwip_connect(int s, struct sockaddr *name, socklen_t namelen); +int lwip_listen(int s, int backlog); +int lwip_recv(int s, void *mem, int len, unsigned int flags); +int lwip_read(int s, void *mem, int len); +int lwip_recvfrom(int s, void *mem, int len, unsigned int flags, + struct sockaddr *from, socklen_t *fromlen); +int lwip_send(int s, void *dataptr, int size, unsigned int flags); +int lwip_sendto(int s, void *dataptr, int size, unsigned int flags, + struct sockaddr *to, socklen_t tolen); +int lwip_socket(int domain, int type, int protocol); +int lwip_write(int s, void *dataptr, int size); +int lwip_select(int maxfdp1, fd_set *readset, fd_set *writeset, fd_set *exceptset, + struct timeval *timeout); +int lwip_ioctl(int s, long cmd, void *argp); + +#if LWIP_COMPAT_SOCKETS +#define accept(a,b,c) lwip_accept(a,b,c) +#define bind(a,b,c) lwip_bind(a,b,c) +#define shutdown(a,b) lwip_shutdown(a,b) +#define close(s) lwip_close(s) +#define connect(a,b,c) lwip_connect(a,b,c) +#define getsockname(a,b,c) lwip_getsockname(a,b,c) +#define getpeername(a,b,c) lwip_getpeername(a,b,c) +#define setsockopt(a,b,c,d,e) lwip_setsockopt(a,b,c,d,e) +#define getsockopt(a,b,c,d,e) lwip_getsockopt(a,b,c,d,e) +#define listen(a,b) lwip_listen(a,b) +#define recv(a,b,c,d) lwip_recv(a,b,c,d) +#define read(a,b,c) lwip_read(a,b,c) +#define recvfrom(a,b,c,d,e,f) lwip_recvfrom(a,b,c,d,e,f) +#define send(a,b,c,d) lwip_send(a,b,c,d) +#define sendto(a,b,c,d,e,f) lwip_sendto(a,b,c,d,e,f) +#define socket(a,b,c) lwip_socket(a,b,c) +#define write(a,b,c) lwip_write(a,b,c) +#define select(a,b,c,d,e) lwip_select(a,b,c,d,e) +#define ioctlsocket(a,b,c) lwip_ioctl(a,b,c) +#endif /* LWIP_COMPAT_SOCKETS */ + +#endif /* __LWIP_SOCKETS_H__ */ +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/stats.h @@ -0,0 +1,158 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ +#ifndef __LWIP_STATS_H__ +#define __LWIP_STATS_H__ + +#include "lwip/opt.h" +#include "arch/cc.h" + +#include "lwip/mem.h" +#include "lwip/memp.h" + +#if LWIP_STATS + +struct stats_proto { + u16_t xmit; /* Transmitted packets. */ + u16_t rexmit; /* Retransmitted packets. */ + u16_t recv; /* Received packets. */ + u16_t fw; /* Forwarded packets. */ + u16_t drop; /* Dropped packets. */ + u16_t chkerr; /* Checksum error. */ + u16_t lenerr; /* Invalid length error. */ + u16_t memerr; /* Out of memory error. */ + u16_t rterr; /* Routing error. */ + u16_t proterr; /* Protocol error. */ + u16_t opterr; /* Error in options. */ + u16_t err; /* Misc error. */ + u16_t cachehit; +}; + +struct stats_mem { + mem_size_t avail; + mem_size_t used; + mem_size_t max; + mem_size_t err; +}; + +struct stats_pbuf { + u16_t avail; + u16_t used; + u16_t max; + u16_t err; + + u16_t alloc_locked; + u16_t refresh_locked; +}; + +struct stats_syselem { + u16_t used; + u16_t max; + u16_t err; +}; + +struct stats_sys { + struct stats_syselem sem; + struct stats_syselem mbox; +}; + +struct stats_ { + struct stats_proto link; + struct stats_proto ip_frag; + struct stats_proto ip; + struct stats_proto icmp; + struct stats_proto udp; + struct stats_proto tcp; + struct stats_pbuf pbuf; + struct stats_mem mem; + struct stats_mem memp[MEMP_MAX]; + struct stats_sys sys; +}; + +extern struct stats_ lwip_stats; + + +void stats_init(void); + +#define STATS_INC(x) ++lwip_stats.x +#else +#define stats_init() +#define STATS_INC(x) +#endif /* LWIP_STATS */ + +#if TCP_STATS +#define TCP_STATS_INC(x) STATS_INC(x) +#else +#define TCP_STATS_INC(x) +#endif + +#if UDP_STATS +#define UDP_STATS_INC(x) STATS_INC(x) +#else +#define UDP_STATS_INC(x) +#endif + +#if ICMP_STATS +#define ICMP_STATS_INC(x) STATS_INC(x) +#else +#define ICMP_STATS_INC(x) +#endif + +#if IP_STATS +#define IP_STATS_INC(x) STATS_INC(x) +#else +#define IP_STATS_INC(x) +#endif + +#if IPFRAG_STATS +#define IPFRAG_STATS_INC(x) STATS_INC(x) +#else +#define IPFRAG_STATS_INC(x) +#endif + +#if LINK_STATS +#define LINK_STATS_INC(x) STATS_INC(x) +#else +#define LINK_STATS_INC(x) +#endif + +/* Display of statistics */ +#if LWIP_STATS_DISPLAY +void stats_display(void); +#else +#define stats_display() +#endif + +#endif /* __LWIP_STATS_H__ */ + + + +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/sys.h @@ -0,0 +1,183 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ +#ifndef __LWIP_SYS_H__ +#define __LWIP_SYS_H__ + +#include "arch/cc.h" + +#include "lwip/opt.h" + + +#if NO_SYS + +/* For a totally minimal and standalone system, we provide null + definitions of the sys_ functions. */ +typedef u8_t sys_sem_t; +typedef u8_t sys_mbox_t; +struct sys_timeout {u8_t dummy;}; + +#define sys_init() +#define sys_timeout(m,h,a) +#define sys_untimeout(m,a) +#define sys_sem_new(c) c +#define sys_sem_signal(s) +#define sys_sem_wait(s) +#define sys_sem_free(s) +#define sys_mbox_new() 0 +#define sys_mbox_fetch(m,d) +#define sys_mbox_post(m,d) +#define sys_mbox_free(m) + +#define sys_thread_new(t,a,p) + +#else /* NO_SYS */ + +#include "arch/sys_arch.h" + +/** Return code for timeouts from sys_arch_mbox_fetch and sys_arch_sem_wait */ +#define SYS_ARCH_TIMEOUT 0xffffffff + +typedef void (* sys_timeout_handler)(void *arg); + +struct sys_timeout { + struct sys_timeout *next; + u32_t time; + sys_timeout_handler h; + void *arg; +}; + +struct sys_timeouts { + struct sys_timeout *next; +}; + +/* sys_init() must be called before anthing else. */ +void sys_init(void); + +/* + * sys_timeout(): + * + * Schedule a timeout a specified amount of milliseconds in the + * future. When the timeout occurs, the specified timeout handler will + * be called. The handler will be passed the "arg" argument when + * called. + * + */ +void sys_timeout(u32_t msecs, sys_timeout_handler h, void *arg); +void sys_untimeout(sys_timeout_handler h, void *arg); +struct sys_timeouts *sys_arch_timeouts(void); + +/* Semaphore functions. */ +sys_sem_t sys_sem_new(u8_t count); +void sys_sem_signal(sys_sem_t sem); +u32_t sys_arch_sem_wait(sys_sem_t sem, u32_t timeout); +void sys_sem_free(sys_sem_t sem); +void sys_sem_wait(sys_sem_t sem); +int sys_sem_wait_timeout(sys_sem_t sem, u32_t timeout); + +/* Time functions. */ +#ifndef sys_msleep +void sys_msleep(u32_t ms); /* only has a (close to) 1 jiffy resolution. */ +#endif +#ifndef sys_jiffies +u32_t sys_jiffies(void); /* since power up. */ +#endif + +/* Mailbox functions. */ +sys_mbox_t sys_mbox_new(void); +void sys_mbox_post(sys_mbox_t mbox, void *msg); +u32_t sys_arch_mbox_fetch(sys_mbox_t mbox, void **msg, u32_t timeout); +void sys_mbox_free(sys_mbox_t mbox); +void sys_mbox_fetch(sys_mbox_t mbox, void **msg); + + +/* Thread functions. */ +sys_thread_t sys_thread_new(void (* thread)(void *arg), void *arg, int prio); + +/* The following functions are used only in Unix code, and + can be omitted when porting the stack. */ +/* Returns the current time in microseconds. */ +unsigned long sys_now(void); + +#endif /* NO_SYS */ + +/* Critical Region Protection */ +/* These functions must be implemented in the sys_arch.c file. + In some implementations they can provide a more light-weight protection + mechanism than using semaphores. Otherwise semaphores can be used for + implementation */ +#ifndef SYS_ARCH_PROTECT +/** SYS_LIGHTWEIGHT_PROT + * define SYS_LIGHTWEIGHT_PROT in lwipopts.h if you want inter-task protection + * for certain critical regions during buffer allocation, deallocation and memory + * allocation and deallocation. + */ +#if SYS_LIGHTWEIGHT_PROT + +/** SYS_ARCH_DECL_PROTECT + * declare a protection variable. This macro will default to defining a variable of + * type sys_prot_t. If a particular port needs a different implementation, then + * this macro may be defined in sys_arch.h. + */ +#define SYS_ARCH_DECL_PROTECT(lev) sys_prot_t lev +/** SYS_ARCH_PROTECT + * Perform a "fast" protect. This could be implemented by + * disabling interrupts for an embedded system or by using a semaphore or + * mutex. The implementation should allow calling SYS_ARCH_PROTECT when + * already protected. The old protection level is returned in the variable + * "lev". This macro will default to calling the sys_arch_protect() function + * which should be implemented in sys_arch.c. If a particular port needs a + * different implementation, then this macro may be defined in sys_arch.h + */ +#define SYS_ARCH_PROTECT(lev) lev = sys_arch_protect() +/** SYS_ARCH_UNPROTECT + * Perform a "fast" set of the protection level to "lev". This could be + * implemented by setting the interrupt level to "lev" within the MACRO or by + * using a semaphore or mutex. This macro will default to calling the + * sys_arch_unprotect() function which should be implemented in + * sys_arch.c. If a particular port needs a different implementation, then + * this macro may be defined in sys_arch.h + */ +#define SYS_ARCH_UNPROTECT(lev) sys_arch_unprotect(lev) +sys_prot_t sys_arch_protect(void); +void sys_arch_unprotect(sys_prot_t pval); + +#else + +#define SYS_ARCH_DECL_PROTECT(lev) +#define SYS_ARCH_PROTECT(lev) +#define SYS_ARCH_UNPROTECT(lev) + +#endif /* SYS_LIGHTWEIGHT_PROT */ + +#endif /* SYS_ARCH_PROTECT */ + +#endif /* __LWIP_SYS_H__ */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/tcp.h @@ -0,0 +1,531 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ +#ifndef __LWIP_TCP_H__ +#define __LWIP_TCP_H__ + +#include "lwip/sys.h" +#include "lwip/mem.h" + +#include "lwip/pbuf.h" +#include "lwip/opt.h" +#include "lwip/ip.h" +#include "lwip/icmp.h" + +#include "lwip/err.h" + +struct tcp_pcb; + +/* Functions for interfacing with TCP: */ + +/* Lower layer interface to TCP: */ +void tcp_init (void); /* Must be called first to + initialize TCP. */ +void tcp_tmr (void); /* Must be called every + TCP_TMR_INTERVAL + ms. (Typically 250 ms). */ +/* Application program's interface: */ +struct tcp_pcb * tcp_new (void); +struct tcp_pcb * tcp_alloc (u8_t prio); + +void tcp_arg (struct tcp_pcb *pcb, void *arg); +void tcp_accept (struct tcp_pcb *pcb, + err_t (* accept)(void *arg, struct tcp_pcb *newpcb, + err_t err)); +void tcp_recv (struct tcp_pcb *pcb, + err_t (* recv)(void *arg, struct tcp_pcb *tpcb, + struct pbuf *p, err_t err)); +void tcp_sent (struct tcp_pcb *pcb, + err_t (* sent)(void *arg, struct tcp_pcb *tpcb, + u16_t len)); +void tcp_poll (struct tcp_pcb *pcb, + err_t (* poll)(void *arg, struct tcp_pcb *tpcb), + u8_t interval); +void tcp_err (struct tcp_pcb *pcb, + void (* err)(void *arg, err_t err)); + +#define tcp_mss(pcb) ((pcb)->mss) +#define tcp_sndbuf(pcb) ((pcb)->snd_buf) + +void tcp_recved (struct tcp_pcb *pcb, u16_t len); +err_t tcp_bind (struct tcp_pcb *pcb, struct ip_addr *ipaddr, + u16_t port); +err_t tcp_connect (struct tcp_pcb *pcb, struct ip_addr *ipaddr, + u16_t port, err_t (* connected)(void *arg, + struct tcp_pcb *tpcb, + err_t err)); +struct tcp_pcb * tcp_listen (struct tcp_pcb *pcb); +void tcp_abort (struct tcp_pcb *pcb); +err_t tcp_close (struct tcp_pcb *pcb); +err_t tcp_write (struct tcp_pcb *pcb, const void *dataptr, u16_t len, + u8_t copy); + +void tcp_setprio (struct tcp_pcb *pcb, u8_t prio); + +#define TCP_PRIO_MIN 1 +#define TCP_PRIO_NORMAL 64 +#define TCP_PRIO_MAX 127 + +/* It is also possible to call these two functions at the right + intervals (instead of calling tcp_tmr()). */ +void tcp_slowtmr (void); +void tcp_fasttmr (void); + + +/* Only used by IP to pass a TCP segment to TCP: */ +void tcp_input (struct pbuf *p, struct netif *inp); +/* Used within the TCP code only: */ +err_t tcp_output (struct tcp_pcb *pcb); +void tcp_rexmit (struct tcp_pcb *pcb); + + + +#define TCP_SEQ_LT(a,b) ((s32_t)((a)-(b)) < 0) +#define TCP_SEQ_LEQ(a,b) ((s32_t)((a)-(b)) <= 0) +#define TCP_SEQ_GT(a,b) ((s32_t)((a)-(b)) > 0) +#define TCP_SEQ_GEQ(a,b) ((s32_t)((a)-(b)) >= 0) + +#define TCP_FIN 0x01U +#define TCP_SYN 0x02U +#define TCP_RST 0x04U +#define TCP_PSH 0x08U +#define TCP_ACK 0x10U +#define TCP_URG 0x20U +#define TCP_ECE 0x40U +#define TCP_CWR 0x80U + +#define TCP_FLAGS 0x3fU + +/* Length of the TCP header, excluding options. */ +#define TCP_HLEN 20 + +#ifndef TCP_TMR_INTERVAL +#define TCP_TMR_INTERVAL 250 /* The TCP timer interval in + milliseconds. */ +#endif /* TCP_TMR_INTERVAL */ + +#ifndef TCP_FAST_INTERVAL +#define TCP_FAST_INTERVAL TCP_TMR_INTERVAL /* the fine grained timeout in + milliseconds */ +#endif /* TCP_FAST_INTERVAL */ + +#ifndef TCP_SLOW_INTERVAL +#define TCP_SLOW_INTERVAL (2*TCP_TMR_INTERVAL) /* the coarse grained timeout in + milliseconds */ +#endif /* TCP_SLOW_INTERVAL */ + +#define TCP_FIN_WAIT_TIMEOUT 20000 /* milliseconds */ +#define TCP_SYN_RCVD_TIMEOUT 20000 /* milliseconds */ + +#define TCP_OOSEQ_TIMEOUT 6 /* x RTO */ + +#define TCP_MSL 60000 /* The maximum segment lifetime in microseconds */ + +/* + * User-settable options (used with setsockopt). + */ +#define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */ +#define TCP_KEEPALIVE 0x02 /* send KEEPALIVE probes when idle for pcb->keepalive miliseconds */ + +/* Keepalive values */ +#define TCP_KEEPDEFAULT 7200000 /* KEEPALIVE timer in miliseconds */ +#define TCP_KEEPINTVL 75000 /* Time between KEEPALIVE probes in miliseconds */ +#define TCP_KEEPCNT 9 /* Counter for KEEPALIVE probes */ +#define TCP_MAXIDLE TCP_KEEPCNT * TCP_KEEPINTVL /* Maximum KEEPALIVE probe time */ + + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct tcp_hdr { + PACK_STRUCT_FIELD(u16_t src); + PACK_STRUCT_FIELD(u16_t dest); + PACK_STRUCT_FIELD(u32_t seqno); + PACK_STRUCT_FIELD(u32_t ackno); + PACK_STRUCT_FIELD(u16_t _hdrlen_rsvd_flags); + PACK_STRUCT_FIELD(u16_t wnd); + PACK_STRUCT_FIELD(u16_t chksum); + PACK_STRUCT_FIELD(u16_t urgp); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +#define TCPH_OFFSET(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) >> 8) +#define TCPH_HDRLEN(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) >> 12) +#define TCPH_FLAGS(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) & TCP_FLAGS) + +#define TCPH_OFFSET_SET(phdr, offset) (phdr)->_hdrlen_rsvd_flags = htons(((offset) << 8) | TCPH_FLAGS(phdr)) +#define TCPH_HDRLEN_SET(phdr, len) (phdr)->_hdrlen_rsvd_flags = htons(((len) << 12) | TCPH_FLAGS(phdr)) +#define TCPH_FLAGS_SET(phdr, flags) (phdr)->_hdrlen_rsvd_flags = htons((ntohs((phdr)->_hdrlen_rsvd_flags) & ~TCP_FLAGS) | (flags)) +#define TCPH_SET_FLAG(phdr, flags ) (phdr)->_hdrlen_rsvd_flags = htons(ntohs((phdr)->_hdrlen_rsvd_flags) | (flags)) +#define TCPH_UNSET_FLAG(phdr, flags) (phdr)->_hdrlen_rsvd_flags = htons(ntohs((phdr)->_hdrlen_rsvd_flags) | (TCPH_FLAGS(phdr) & ~(flags)) ) + +#define TCP_TCPLEN(seg) ((seg)->len + ((TCPH_FLAGS((seg)->tcphdr) & TCP_FIN || \ + TCPH_FLAGS((seg)->tcphdr) & TCP_SYN)? 1: 0)) + +enum tcp_state { + CLOSED = 0, + LISTEN = 1, + SYN_SENT = 2, + SYN_RCVD = 3, + ESTABLISHED = 4, + FIN_WAIT_1 = 5, + FIN_WAIT_2 = 6, + CLOSE_WAIT = 7, + CLOSING = 8, + LAST_ACK = 9, + TIME_WAIT = 10 +}; + + +/* the TCP protocol control block */ +struct tcp_pcb { +/* Common members of all PCB types */ + IP_PCB; + +/* Protocol specific PCB members */ + + struct tcp_pcb *next; /* for the linked list */ + + enum tcp_state state; /* TCP state */ + + u8_t prio; + void *callback_arg; + + u16_t local_port; + u16_t remote_port; + + u8_t flags; +#define TF_ACK_DELAY (u8_t)0x01U /* Delayed ACK. */ +#define TF_ACK_NOW (u8_t)0x02U /* Immediate ACK. */ +#define TF_INFR (u8_t)0x04U /* In fast recovery. */ +#define TF_RESET (u8_t)0x08U /* Connection was reset. */ +#define TF_CLOSED (u8_t)0x10U /* Connection was sucessfully closed. */ +#define TF_GOT_FIN (u8_t)0x20U /* Connection was closed by the remote end. */ +#define TF_NODELAY (u8_t)0x40U /* Disable Nagle algorithm */ + + /* receiver varables */ + u32_t rcv_nxt; /* next seqno expected */ + u16_t rcv_wnd; /* receiver window */ + + /* Timers */ + u32_t tmr; + u8_t polltmr, pollinterval; + + /* Retransmission timer. */ + u16_t rtime; + + u16_t mss; /* maximum segment size */ + + /* RTT estimation variables. */ + u16_t rttest; /* RTT estimate in 500ms ticks */ + u32_t rtseq; /* sequence number being timed */ + s16_t sa, sv; + + u16_t rto; /* retransmission time-out */ + u8_t nrtx; /* number of retransmissions */ + + /* fast retransmit/recovery */ + u32_t lastack; /* Highest acknowledged seqno. */ + u8_t dupacks; + + /* congestion avoidance/control variables */ + u16_t cwnd; + u16_t ssthresh; + + /* sender variables */ + u32_t snd_nxt, /* next seqno to be sent */ + snd_max, /* Highest seqno sent. */ + snd_wnd, /* sender window */ + snd_wl1, snd_wl2, /* Sequence and acknowledgement numbers of last + window update. */ + snd_lbb; /* Sequence number of next byte to be buffered. */ + + u16_t acked; + + u16_t snd_buf; /* Available buffer space for sending (in bytes). */ + u8_t snd_queuelen; /* Available buffer space for sending (in tcp_segs). */ + + + /* These are ordered by sequence number: */ + struct tcp_seg *unsent; /* Unsent (queued) segments. */ + struct tcp_seg *unacked; /* Sent but unacknowledged segments. */ +#if TCP_QUEUE_OOSEQ + struct tcp_seg *ooseq; /* Received out of sequence segments. */ +#endif /* TCP_QUEUE_OOSEQ */ + +#if LWIP_CALLBACK_API + /* Function to be called when more send buffer space is available. */ + err_t (* sent)(void *arg, struct tcp_pcb *pcb, u16_t space); + + /* Function to be called when (in-sequence) data has arrived. */ + err_t (* recv)(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err); + + /* Function to be called when a connection has been set up. */ + err_t (* connected)(void *arg, struct tcp_pcb *pcb, err_t err); + + /* Function to call when a listener has been connected. */ + err_t (* accept)(void *arg, struct tcp_pcb *newpcb, err_t err); + + /* Function which is called periodically. */ + err_t (* poll)(void *arg, struct tcp_pcb *pcb); + + /* Function to be called whenever a fatal error occurs. */ + void (* errf)(void *arg, err_t err); +#endif /* LWIP_CALLBACK_API */ + + /* idle time before KEEPALIVE is sent */ + u32_t keepalive; + + /* KEEPALIVE counter */ + u8_t keep_cnt; +}; + +struct tcp_pcb_listen { +/* Common members of all PCB types */ + IP_PCB; + +/* Protocol specific PCB members */ + struct tcp_pcb_listen *next; /* for the linked list */ + + /* Even if state is obviously LISTEN this is here for + * field compatibility with tpc_pcb to which it is cast sometimes + * Until a cleaner solution emerges this is here.FIXME + */ + enum tcp_state state; /* TCP state */ + + u8_t prio; + void *callback_arg; + + u16_t local_port; + +#if LWIP_CALLBACK_API + /* Function to call when a listener has been connected. */ + err_t (* accept)(void *arg, struct tcp_pcb *newpcb, err_t err); +#endif /* LWIP_CALLBACK_API */ +}; + +#if LWIP_EVENT_API + +enum lwip_event { + LWIP_EVENT_ACCEPT, + LWIP_EVENT_SENT, + LWIP_EVENT_RECV, + LWIP_EVENT_CONNECTED, + LWIP_EVENT_POLL, + LWIP_EVENT_ERR +}; + +err_t lwip_tcp_event(void *arg, struct tcp_pcb *pcb, + enum lwip_event, + struct pbuf *p, + u16_t size, + err_t err); + +#define TCP_EVENT_ACCEPT(pcb,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\ + LWIP_EVENT_ACCEPT, NULL, 0, err) +#define TCP_EVENT_SENT(pcb,space,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\ + LWIP_EVENT_SENT, NULL, space, ERR_OK) +#define TCP_EVENT_RECV(pcb,p,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\ + LWIP_EVENT_RECV, (p), 0, (err)) +#define TCP_EVENT_CONNECTED(pcb,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\ + LWIP_EVENT_CONNECTED, NULL, 0, (err)) +#define TCP_EVENT_POLL(pcb,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\ + LWIP_EVENT_POLL, NULL, 0, ERR_OK) +#define TCP_EVENT_ERR(errf,arg,err) lwip_tcp_event((arg), NULL, \ + LWIP_EVENT_ERR, NULL, 0, (err)) +#else /* LWIP_EVENT_API */ +#define TCP_EVENT_ACCEPT(pcb,err,ret) \ + if((pcb)->accept != NULL) \ + (ret = (pcb)->accept((pcb)->callback_arg,(pcb),(err))) +#define TCP_EVENT_SENT(pcb,space,ret) \ + if((pcb)->sent != NULL) \ + (ret = (pcb)->sent((pcb)->callback_arg,(pcb),(space))) +#define TCP_EVENT_RECV(pcb,p,err,ret) \ + if((pcb)->recv != NULL) \ + { ret = (pcb)->recv((pcb)->callback_arg,(pcb),(p),(err)); } else { \ + pbuf_free(p); } +#define TCP_EVENT_CONNECTED(pcb,err,ret) \ + if((pcb)->connected != NULL) \ + (ret = (pcb)->connected((pcb)->callback_arg,(pcb),(err))) +#define TCP_EVENT_POLL(pcb,ret) \ + if((pcb)->poll != NULL) \ + (ret = (pcb)->poll((pcb)->callback_arg,(pcb))) +#define TCP_EVENT_ERR(errf,arg,err) \ + if((errf) != NULL) \ + (errf)((arg),(err)) +#endif /* LWIP_EVENT_API */ + +/* This structure is used to repressent TCP segments when queued. */ +struct tcp_seg { + struct tcp_seg *next; /* used when putting segements on a queue */ + struct pbuf *p; /* buffer containing data + TCP header */ + void *dataptr; /* pointer to the TCP data in the pbuf */ + u16_t len; /* the TCP length of this segment */ + struct tcp_hdr *tcphdr; /* the TCP header */ +}; + +/* Internal functions and global variables: */ +struct tcp_pcb *tcp_pcb_copy(struct tcp_pcb *pcb); +void tcp_pcb_purge(struct tcp_pcb *pcb); +void tcp_pcb_remove(struct tcp_pcb **pcblist, struct tcp_pcb *pcb); + +u8_t tcp_segs_free(struct tcp_seg *seg); +u8_t tcp_seg_free(struct tcp_seg *seg); +struct tcp_seg *tcp_seg_copy(struct tcp_seg *seg); + +#define tcp_ack(pcb) if((pcb)->flags & TF_ACK_DELAY) { \ + (pcb)->flags &= ~TF_ACK_DELAY; \ + (pcb)->flags |= TF_ACK_NOW; \ + tcp_output(pcb); \ + } else { \ + (pcb)->flags |= TF_ACK_DELAY; \ + } + +#define tcp_ack_now(pcb) (pcb)->flags |= TF_ACK_NOW; \ + tcp_output(pcb) + +err_t tcp_send_ctrl(struct tcp_pcb *pcb, u8_t flags); +err_t tcp_enqueue(struct tcp_pcb *pcb, void *dataptr, u16_t len, + u8_t flags, u8_t copy, + u8_t *optdata, u8_t optlen); + +void tcp_rexmit_seg(struct tcp_pcb *pcb, struct tcp_seg *seg); + +void tcp_rst(u32_t seqno, u32_t ackno, + struct ip_addr *local_ip, struct ip_addr *remote_ip, + u16_t local_port, u16_t remote_port); + +u32_t tcp_next_iss(void); + +void tcp_keepalive(struct tcp_pcb *pcb); + +extern struct tcp_pcb *tcp_input_pcb; +extern u32_t tcp_ticks; + +#if TCP_DEBUG || TCP_INPUT_DEBUG || TCP_OUTPUT_DEBUG +void tcp_debug_print(struct tcp_hdr *tcphdr); +void tcp_debug_print_flags(u8_t flags); +void tcp_debug_print_state(enum tcp_state s); +void tcp_debug_print_pcbs(void); +int tcp_pcbs_sane(void); +#else +# define tcp_debug_print(tcphdr) +# define tcp_debug_print_flags(flags) +# define tcp_debug_print_state(s) +# define tcp_debug_print_pcbs() +# define tcp_pcbs_sane() 1 +#endif /* TCP_DEBUG */ + +#if NO_SYS +#define tcp_timer_needed() +#else +void tcp_timer_needed(void); +#endif + +/* The TCP PCB lists. */ +union tcp_listen_pcbs_t { /* List of all TCP PCBs in LISTEN state. */ + struct tcp_pcb_listen *listen_pcbs; + struct tcp_pcb *pcbs; +}; +extern union tcp_listen_pcbs_t tcp_listen_pcbs; +extern struct tcp_pcb *tcp_active_pcbs; /* List of all TCP PCBs that are in a + state in which they accept or send + data. */ +extern struct tcp_pcb *tcp_tw_pcbs; /* List of all TCP PCBs in TIME-WAIT. */ + +extern struct tcp_pcb *tcp_tmp_pcb; /* Only used for temporary storage. */ + +/* Axioms about the above lists: + 1) Every TCP PCB that is not CLOSED is in one of the lists. + 2) A PCB is only in one of the lists. + 3) All PCBs in the tcp_listen_pcbs list is in LISTEN state. + 4) All PCBs in the tcp_tw_pcbs list is in TIME-WAIT state. +*/ + +/* Define two macros, TCP_REG and TCP_RMV that registers a TCP PCB + with a PCB list or removes a PCB from a list, respectively. */ +#if 0 +#define TCP_REG(pcbs, npcb) do {\ + LWIP_DEBUGF(TCP_DEBUG, ("TCP_REG %p local port %d\n", npcb, npcb->local_port)); \ + for(tcp_tmp_pcb = *pcbs; \ + tcp_tmp_pcb != NULL; \ + tcp_tmp_pcb = tcp_tmp_pcb->next) { \ + LWIP_ASSERT("TCP_REG: already registered\n", tcp_tmp_pcb != npcb); \ + } \ + LWIP_ASSERT("TCP_REG: pcb->state != CLOSED", npcb->state != CLOSED); \ + npcb->next = *pcbs; \ + LWIP_ASSERT("TCP_REG: npcb->next != npcb", npcb->next != npcb); \ + *(pcbs) = npcb; \ + LWIP_ASSERT("TCP_RMV: tcp_pcbs sane", tcp_pcbs_sane()); \ + tcp_timer_needed(); \ + } while(0) +#define TCP_RMV(pcbs, npcb) do { \ + LWIP_ASSERT("TCP_RMV: pcbs != NULL", *pcbs != NULL); \ + LWIP_DEBUGF(TCP_DEBUG, ("TCP_RMV: removing %p from %p\n", npcb, *pcbs)); \ + if(*pcbs == npcb) { \ + *pcbs = (*pcbs)->next; \ + } else for(tcp_tmp_pcb = *pcbs; tcp_tmp_pcb != NULL; tcp_tmp_pcb = tcp_tmp_pcb->next) { \ + if(tcp_tmp_pcb->next != NULL && tcp_tmp_pcb->next == npcb) { \ + tcp_tmp_pcb->next = npcb->next; \ + break; \ + } \ + } \ + npcb->next = NULL; \ + LWIP_ASSERT("TCP_RMV: tcp_pcbs sane", tcp_pcbs_sane()); \ + LWIP_DEBUGF(TCP_DEBUG, ("TCP_RMV: removed %p from %p\n", npcb, *pcbs)); \ + } while(0) + +#else /* LWIP_DEBUG */ +#define TCP_REG(pcbs, npcb) do { \ + npcb->next = *pcbs; \ + *(pcbs) = npcb; \ + tcp_timer_needed(); \ + } while(0) +#define TCP_RMV(pcbs, npcb) do { \ + if(*(pcbs) == npcb) { \ + (*(pcbs)) = (*pcbs)->next; \ + } else for(tcp_tmp_pcb = *pcbs; tcp_tmp_pcb != NULL; tcp_tmp_pcb = tcp_tmp_pcb->next) { \ + if(tcp_tmp_pcb->next != NULL && tcp_tmp_pcb->next == npcb) { \ + tcp_tmp_pcb->next = npcb->next; \ + break; \ + } \ + } \ + npcb->next = NULL; \ + } while(0) +#endif /* LWIP_DEBUG */ +#endif /* __LWIP_TCP_H__ */ + + +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/tcpip.h @@ -0,0 +1,68 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ +#ifndef __LWIP_TCPIP_H__ +#define __LWIP_TCPIP_H__ + +#include "lwip/api_msg.h" +#include "lwip/pbuf.h" + +void tcpip_init(void (* tcpip_init_done)(void *), void *arg); +void tcpip_apimsg(struct api_msg *apimsg); +err_t tcpip_input(struct pbuf *p, struct netif *inp); +err_t tcpip_callback(void (*f)(void *ctx), void *ctx); + +void tcpip_tcp_timer_needed(void); + +enum tcpip_msg_type { + TCPIP_MSG_API, + TCPIP_MSG_INPUT, + TCPIP_MSG_CALLBACK +}; + +struct tcpip_msg { + enum tcpip_msg_type type; + sys_sem_t *sem; + union { + struct api_msg *apimsg; + struct { + struct pbuf *p; + struct netif *netif; + } inp; + struct { + void (*f)(void *ctx); + void *ctx; + } cb; + } msg; +}; + + +#endif /* __LWIP_TCPIP_H__ */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwip/udp.h @@ -0,0 +1,104 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ +#ifndef __LWIP_UDP_H__ +#define __LWIP_UDP_H__ + +#include "lwip/arch.h" + +#include "lwip/pbuf.h" +#include "lwip/inet.h" +#include "lwip/ip.h" + +#define UDP_HLEN 8 + +struct udp_hdr { + PACK_STRUCT_FIELD(u16_t src); + PACK_STRUCT_FIELD(u16_t dest); /* src/dest UDP ports */ + PACK_STRUCT_FIELD(u16_t len); + PACK_STRUCT_FIELD(u16_t chksum); +} PACK_STRUCT_STRUCT; + +#define UDP_FLAGS_NOCHKSUM 0x01U +#define UDP_FLAGS_UDPLITE 0x02U +#define UDP_FLAGS_CONNECTED 0x04U + +struct udp_pcb { +/* Common members of all PCB types */ + IP_PCB; + +/* Protocol specific PCB members */ + + struct udp_pcb *next; + + u8_t flags; + u16_t local_port, remote_port; + + u16_t chksum_len; + + void (* recv)(void *arg, struct udp_pcb *pcb, struct pbuf *p, + struct ip_addr *addr, u16_t port); + void *recv_arg; +}; + +/* The following functions is the application layer interface to the + UDP code. */ +struct udp_pcb * udp_new (void); +void udp_remove (struct udp_pcb *pcb); +err_t udp_bind (struct udp_pcb *pcb, struct ip_addr *ipaddr, + u16_t port); +err_t udp_connect (struct udp_pcb *pcb, struct ip_addr *ipaddr, + u16_t port); +void udp_disconnect (struct udp_pcb *pcb); +void udp_recv (struct udp_pcb *pcb, + void (* recv)(void *arg, struct udp_pcb *upcb, + struct pbuf *p, + struct ip_addr *addr, + u16_t port), + void *recv_arg); +err_t udp_sendto (struct udp_pcb *pcb, struct pbuf *p, struct ip_addr *dst_ip, u16_t dst_port); +err_t udp_send (struct udp_pcb *pcb, struct pbuf *p); + +#define udp_flags(pcb) ((pcb)->flags) +#define udp_setflags(pcb, f) ((pcb)->flags = (f)) + +/* The following functions are the lower layer interface to UDP. */ +void udp_input (struct pbuf *p, struct netif *inp); +void udp_init (void); + +#if UDP_DEBUG +int udp_debug_print(struct udp_hdr *udphdr); +#else +#define udp_debug_print(udphdr) +#endif +#endif /* __LWIP_UDP_H__ */ + +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/lwipopts.h @@ -0,0 +1,225 @@ +/* + * Copyright (c) 2001, Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Jani Monoses <jani@iv.ro> + * + */ +#ifndef __LWIPOPTS_H__ +#define __LWIPOPTS_H__ +/*include the configuration made with configtool*/ +#include <pkgconf/net_lwip.h> +/* ---------- Memory options ---------- */ +/* MEM_ALIGNMENT: should be set to the alignment of the CPU for which + lwIP is compiled. 4 byte alignment -> define MEM_ALIGNMENT to 4, 2 + byte alignment -> define MEM_ALIGNMENT to 2. */ +#define MEM_ALIGNMENT CYGPKG_LWIP_MEM_ALIGNMENT + +/* MEM_SIZE: the size of the heap memory. If the application will send +a lot of data that needs to be copied, this should be set high. */ +#define MEM_SIZE CYGPKG_LWIP_MEM_SIZE + +/* MEMP_NUM_PBUF: the number of memp struct pbufs. If the application + sends a lot of data out of ROM (or other static memory), this + should be set high. */ +#define MEMP_NUM_PBUF CYGPKG_LWIP_MEMP_NUM_PBUF +/* MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One + per active UDP "connection". */ +#define MEMP_NUM_UDP_PCB CYGPKG_LWIP_MEMP_NUM_UDP_PCB +/* MEMP_NUM_TCP_PCB: the number of simulatenously active TCP + connections. */ +#define MEMP_NUM_TCP_PCB CYGPKG_LWIP_MEMP_NUM_TCP_PCB +/* MEMP_NUM_TCP_PCB_LISTEN: the number of listening TCP + connections. */ +#define MEMP_NUM_TCP_PCB_LISTEN CYGPKG_LWIP_MEMP_NUM_TCP_PCB_LISTEN +/* MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP + segments. */ +#define MEMP_NUM_TCP_SEG CYGPKG_LWIP_MEMP_NUM_TCP_SEG +/* MEMP_NUM_SYS_TIMEOUT: the number of simulateously active + timeouts. */ +#define MEMP_NUM_SYS_TIMEOUT CYGPKG_LWIP_MEMP_NUM_SYS_TIMEOUT + + +/* The following four are used only with the sequential API and can be + set to 0 if the application only will use the raw API. */ +/* MEMP_NUM_NETBUF: the number of struct netbufs. */ +#define MEMP_NUM_NETBUF CYGPKG_LWIP_MEMP_NUM_NETBUF +/* MEMP_NUM_NETCONN: the number of struct netconns. */ +#define MEMP_NUM_NETCONN CYGPKG_LWIP_MEMP_NUM_NETCONN +/* MEMP_NUM_APIMSG: the number of struct api_msg, used for + communication between the TCP/IP stack and the sequential + programs. */ +#define MEMP_NUM_API_MSG CYGPKG_LWIP_MEMP_NUM_APIMSG +/* MEMP_NUM_TCPIPMSG: the number of struct tcpip_msg, which is used + for sequential API communication and incoming packets. Used in + src/api/tcpip.c. */ +#define MEMP_NUM_TCPIP_MSG CYGPKG_LWIP_MEMP_NUM_TCPIP_MSG + +/* ---------- Pbuf options ---------- */ +/* PBUF_POOL_SIZE: the number of buffers in the pbuf pool. */ +#define PBUF_POOL_SIZE CYGPKG_LWIP_PBUF_POOL_SIZE + +/* PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. */ +#define PBUF_POOL_BUFSIZE CYGPKG_LWIP_PBUF_POOL_BUFSIZE + +/* PBUF_LINK_HLEN: the number of bytes that should be allocated for a + link level header. */ +#define PBUF_LINK_HLEN CYGPKG_LWIP_PBUF_LINK_HLEN + +/* ---------- TCP options ---------- */ +#define LWIP_TCP defined (CYGPKG_LWIP_TCP) +#define TCP_TTL CYGPKG_LWIP_TCP_TTL + +/* Controls if TCP should queue segments that arrive out of + order. Define to 0 if your device is low on memory. */ +#define TCP_QUEUE_OOSEQ CYGPKG_LWIP_TCP_QUEUE_OOSEQ + +/* TCP Maximum segment size. */ +#define TCP_MSS CYGPKG_LWIP_TCP_MSS + +/* TCP sender buffer space (bytes). */ +#define TCP_SND_BUF CYGPKG_LWIP_TCP_SND_BUF +#define TCP_SNDLOWAT TCP_SND_BUF/2 + +/* TCP sender buffer space (pbufs). This must be at least = 2 * + TCP_SND_BUF/TCP_MSS for things to work. */ +#define TCP_SND_QUEUELEN CYGPKG_LWIP_TCP_SND_QUEUELEN + +/* TCP receive window. */ +#define TCP_WND CYGPKG_LWIP_TCP_WND + +/* Maximum number of retransmissions of data segments. */ +#define TCP_MAXRTX CYGPKG_LWIP_TCP_MAXRTX + +/* Maximum number of retransmissions of SYN segments. */ +#define TCP_SYNMAXRTX CYGPKG_LWIP_TCP_SYNMAXRTX + +/* ---------- ARP options ---------- */ +#define ARP_TABLE_SIZE CYGPKG_LWIP_ARP_TABLE_SIZE + +/* ---------- IP options ---------- */ +/* Define IP_FORWARD to 1 if you wish to have the ability to forward + IP packets across network interfaces. If you are going to run lwIP + on a device with only one network interface, define this to 0. */ +#define IP_FORWARD CYGPKG_LWIP_IP_FORWARD + +/* If defined to 1, IP options are allowed (but not parsed). If + defined to 0, all packets with IP options are dropped. */ +#define IP_OPTIONS CYGPKG_LWIP_IP_OPTIONS + +/* ---------- ICMP options ---------- */ +#define ICMP_TTL CYGPKG_LWIP_ICMP_TTL + + +/* ---------- DHCP options ---------- */ +/* Define LWIP_DHCP to 1 if you want DHCP configuration of + interfaces.*/ + +#ifdef CYGPKG_LWIP_DHCP +#define LWIP_DHCP CYGPKG_LWIP_DHCP + +/* 1 if you want to do an ARP check on the offered address + (recommended). */ +#define DHCP_DOES_ARP_CHECK CYGPKG_LWIP_DHCP_DOES_ARP_CHECK +#endif + +/* ---------- UDP options ---------- */ +#define LWIP_UDP CYGPKG_LWIP_UDP +#define UDP_TTL CYGPKG_LWIP_UDP_TTL + +/* ---------- RAW socket support ---------- */ +#define LWIP_RAW CYGPKG_LWIP_RAW + +/* ---------- SLIP options --------- */ +#define LWIP_SLIP defined(CYGPKG_LWIP_SLIP) +#define SLIP_DEV CYGPKG_LWIP_SLIP_DEV + +#define LWIP_HAVE_LOOPIF defined (CYGPKG_LWIP_LOOPIF) +/* ---------- PPP options --------- */ +#define PPP_SUPPORT defined(CYGPKG_LWIP_PPP) +#define PPP_DEV CYGPKG_LWIP_PPP_DEV +#define MD5_SUPPORT 1 + +#if defined(CYGPKG_LWIP_PPP_PAP_AUTH) +#define PAP_SUPPORT 1 +#else +#define PAP_SUPPORT 0 +#endif + +#if defined(CYGPKG_LWIP_PPP_CHAP_AUTH) +#define CHAP_SUPPORT 1 +#else +#define CHAP_SUPPORT 0 +#endif + +/* ------- Thread priorities ---------------*/ +#define TCPIP_THREAD_PRIO CYGPKG_LWIP_TCPIP_THREAD_PRIORITY +#define SLIPIF_THREAD_PRIO CYGPKG_LWIP_SLIPIF_THREAD_PRIORITY +#define PPP_THREAD_PRIO CYGPKG_LWIP_PPP_THREAD_PRIORITY +/* ---------- Statistics options ---------- */ +#define LWIP_STATS defined(CYGPKG_LWIP_STATS) + +/* ---------- Debug options ---------- */ +#if !defined(CYGPKG_LWIP_ASSERTS) +#define LWIP_NOASSERT +#endif + +#if defined(CYGPKG_LWIP_DEBUG) +#define LWIP_DEBUG +#define MEM_DEBUG DBG_ON +#define MEMP_DEBUG DBG_ON +#define PBUF_DEBUG DBG_ON +#define API_LIB_DEBUG DBG_ON +#define API_MSG_DEBUG DBG_ON +#define TCPIP_DEBUG DBG_ON +#define NETIF_DEBUG DBG_ON +#define SOCKETS_DEBUG DBG_ON +#define DEMO_DEBUG DBG_ON +#define IP_DEBUG DBG_ON +#define IP_REASS_DEBUG DBG_ON +#define RAW_DEBUG DBG_ON +#define ICMP_DEBUG DBG_ON +#define UDP_DEBUG DBG_ON +#define TCP_DEBUG DBG_ON +#define TCP_INPUT_DEBUG DBG_ON +#define TCP_OUTPUT_DEBUG DBG_ON +#define TCP_RTO_DEBUG DBG_ON +#define TCP_CWND_DEBUG DBG_ON +#define TCP_WND_DEBUG DBG_ON +#define TCP_FR_DEBUG DBG_ON +#define TCP_QLEN_DEBUG DBG_ON +#define TCP_RST_DEBUG DBG_ON +#define PPP_DEBUG DBG_ON + +#define DBG_TYPES_ON (DBG_ON|DBG_TRACE|DBG_STATE|DBG_FRESH|DBG_HALT) +#endif + + + +#endif /* __LWIPOPTS_H__ */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/netif/etharp.h @@ -0,0 +1,107 @@ +/* + * Copyright (c) 2001-2003 Swedish Institute of Computer Science. + * Copyright (c) 2003-2004 Leon Woestenberg <leon.woestenberg@axon.tv> + * Copyright (c) 2003-2004 Axon Digital Design B.V., The Netherlands. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + +#ifndef __NETIF_ETHARP_H__ +#define __NETIF_ETHARP_H__ + +#ifndef PAD_ETH_SIZE +#define PAD_ETH_SIZE 0 +#endif + +#include "lwip/pbuf.h" +#include "lwip/ip_addr.h" +#include "lwip/netif.h" +#include "lwip/ip.h" + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct eth_addr { + PACK_STRUCT_FIELD(u8_t addr[6]); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END + +PACK_STRUCT_BEGIN +struct eth_hdr { +#if PAD_ETH_SIZE + PACK_STRUCT_FIELD(u8_t padding[PAD_ETH_SIZE]); +#endif + PACK_STRUCT_FIELD(struct eth_addr dest); + PACK_STRUCT_FIELD(struct eth_addr src); + PACK_STRUCT_FIELD(u16_t type); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END + +PACK_STRUCT_BEGIN +/** the ARP message */ +struct etharp_hdr { + PACK_STRUCT_FIELD(struct eth_hdr ethhdr); + PACK_STRUCT_FIELD(u16_t hwtype); + PACK_STRUCT_FIELD(u16_t proto); + PACK_STRUCT_FIELD(u16_t _hwlen_protolen); + PACK_STRUCT_FIELD(u16_t opcode); + PACK_STRUCT_FIELD(struct eth_addr shwaddr); + PACK_STRUCT_FIELD(struct ip_addr2 sipaddr); + PACK_STRUCT_FIELD(struct eth_addr dhwaddr); + PACK_STRUCT_FIELD(struct ip_addr2 dipaddr); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END + +PACK_STRUCT_BEGIN +struct ethip_hdr { + PACK_STRUCT_FIELD(struct eth_hdr eth); + PACK_STRUCT_FIELD(struct ip_hdr ip); +}; +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +#define ARP_TMR_INTERVAL 10000 + +#define ETHTYPE_ARP 0x0806 +#define ETHTYPE_IP 0x0800 + +void etharp_init(void); +void etharp_tmr(void); +struct pbuf *etharp_ip_input(struct netif *netif, struct pbuf *p); +struct pbuf *etharp_arp_input(struct netif *netif, struct eth_addr *ethaddr, + struct pbuf *p); +struct pbuf *etharp_output(struct netif *netif, struct ip_addr *ipaddr, + struct pbuf *q); +err_t etharp_query(struct netif *netif, struct ip_addr *ipaddr, struct pbuf *q); + + + +#endif /* __NETIF_ARP_H__ */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/netif/loopif.h @@ -0,0 +1,39 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ +#ifndef __NETIF_LOOPIF_H__ +#define __NETIF_LOOPIF_H__ + +#include "lwip/netif.h" + +err_t loopif_init(struct netif *netif); + +#endif /* __NETIF_LOOPIF_H__ */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/netif/slipif.h @@ -0,0 +1,42 @@ +/* + * Copyright (c) 2001, Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ +#ifndef __NETIF_SLIPIF_H__ +#define __NETIF_SLIPIF_H__ + +#include "lwip/netif.h" + +err_t slipif_init(struct netif * netif); + +#endif +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/include/network.h @@ -0,0 +1,6 @@ +/* network.h for compatibility with the other eCos network stacks */ + +#include <lwip/sys.h> /* lwIP stack includes */ +#define LWIP_COMPAT_SOCKETS 1 +#include <lwip/sockets.h> +#include <lwip/inet.h>
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/api/api_lib.c @@ -0,0 +1,728 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + +/* This is the part of the API that is linked with + the application */ + +#include "lwip/opt.h" +#include "lwip/api.h" +#include "lwip/api_msg.h" +#include "lwip/memp.h" + + +struct +netbuf *netbuf_new(void) +{ + struct netbuf *buf; + + buf = memp_malloc(MEMP_NETBUF); + if (buf != NULL) { + buf->p = NULL; + buf->ptr = NULL; + return buf; + } else { + return NULL; + } +} + +void +netbuf_delete(struct netbuf *buf) +{ + if (buf != NULL) { + if (buf->p != NULL) { + pbuf_free(buf->p); + buf->p = buf->ptr = NULL; + } + memp_free(MEMP_NETBUF, buf); + } +} + +void * +netbuf_alloc(struct netbuf *buf, u16_t size) +{ + /* Deallocate any previously allocated memory. */ + if (buf->p != NULL) { + pbuf_free(buf->p); + } + buf->p = pbuf_alloc(PBUF_TRANSPORT, size, PBUF_RAM); + if (buf->p == NULL) { + return NULL; + } + buf->ptr = buf->p; + return buf->p->payload; +} + +void +netbuf_free(struct netbuf *buf) +{ + if (buf->p != NULL) { + pbuf_free(buf->p); + } + buf->p = buf->ptr = NULL; +} + +void +netbuf_ref(struct netbuf *buf, void *dataptr, u16_t size) +{ + if (buf->p != NULL) { + pbuf_free(buf->p); + } + buf->p = pbuf_alloc(PBUF_TRANSPORT, 0, PBUF_REF); + buf->p->payload = dataptr; + buf->p->len = buf->p->tot_len = size; + buf->ptr = buf->p; +} + +void +netbuf_chain(struct netbuf *head, struct netbuf *tail) +{ + pbuf_chain(head->p, tail->p); + head->ptr = head->p; + memp_free(MEMP_NETBUF, tail); +} + +u16_t +netbuf_len(struct netbuf *buf) +{ + return buf->p->tot_len; +} + +err_t +netbuf_data(struct netbuf *buf, void **dataptr, u16_t *len) +{ + if (buf->ptr == NULL) { + return ERR_BUF; + } + *dataptr = buf->ptr->payload; + *len = buf->ptr->len; + return ERR_OK; +} + +s8_t +netbuf_next(struct netbuf *buf) +{ + if (buf->ptr->next == NULL) { + return -1; + } + buf->ptr = buf->ptr->next; + if (buf->ptr->next == NULL) { + return 1; + } + return 0; +} + +void +netbuf_first(struct netbuf *buf) +{ + buf->ptr = buf->p; +} + +void +netbuf_copy_partial(struct netbuf *buf, void *dataptr, u16_t len, u16_t offset) +{ + struct pbuf *p; + u16_t i, left; + + left = 0; + + if(buf == NULL || dataptr == NULL) { + return; + } + + /* This implementation is bad. It should use bcopy + instead. */ + for(p = buf->p; left < len && p != NULL; p = p->next) { + if (offset != 0 && offset >= p->len) { + offset -= p->len; + } else { + for(i = offset; i < p->len; ++i) { + ((char *)dataptr)[left] = ((char *)p->payload)[i]; + if (++left >= len) { + return; + } + } + offset = 0; + } + } +} + +void +netbuf_copy(struct netbuf *buf, void *dataptr, u16_t len) +{ + netbuf_copy_partial(buf, dataptr, len, 0); +} + +struct ip_addr * +netbuf_fromaddr(struct netbuf *buf) +{ + return buf->fromaddr; +} + +u16_t +netbuf_fromport(struct netbuf *buf) +{ + return buf->fromport; +} + +struct +netconn *netconn_new_with_proto_and_callback(enum netconn_type t, u16_t proto, + void (*callback)(struct netconn *, enum netconn_evt, u16_t len)) +{ + struct netconn *conn; + struct api_msg *msg; + + conn = memp_malloc(MEMP_NETCONN); + if (conn == NULL) { + return NULL; + } + + conn->err = ERR_OK; + conn->type = t; + conn->pcb.tcp = NULL; + + if ((conn->mbox = sys_mbox_new()) == SYS_MBOX_NULL) { + memp_free(MEMP_NETCONN, conn); + return NULL; + } + conn->recvmbox = SYS_MBOX_NULL; + conn->acceptmbox = SYS_MBOX_NULL; + conn->sem = SYS_SEM_NULL; + conn->state = NETCONN_NONE; + conn->socket = 0; + conn->callback = callback; + conn->recv_avail = 0; + + if((msg = memp_malloc(MEMP_API_MSG)) == NULL) { + memp_free(MEMP_NETCONN, conn); + return NULL; + } + + msg->type = API_MSG_NEWCONN; + msg->msg.msg.bc.port = proto; /* misusing the port field */ + msg->msg.conn = conn; + api_msg_post(msg); + sys_mbox_fetch(conn->mbox, NULL); + memp_free(MEMP_API_MSG, msg); + + if ( conn->err != ERR_OK ) { + memp_free(MEMP_NETCONN, conn); + return NULL; + } + + return conn; +} + + +struct +netconn *netconn_new(enum netconn_type t) +{ + return netconn_new_with_proto_and_callback(t,0,NULL); +} + +struct +netconn *netconn_new_with_callback(enum netconn_type t, + void (*callback)(struct netconn *, enum netconn_evt, u16_t len)) +{ + return netconn_new_with_proto_and_callback(t,0,callback); +} + + +err_t +netconn_delete(struct netconn *conn) +{ + struct api_msg *msg; + void *mem; + + if (conn == NULL) { + return ERR_OK; + } + + if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) { + return ERR_MEM; + } + + msg->type = API_MSG_DELCONN; + msg->msg.conn = conn; + api_msg_post(msg); + sys_mbox_fetch(conn->mbox, NULL); + memp_free(MEMP_API_MSG, msg); + + /* Drain the recvmbox. */ + if (conn->recvmbox != SYS_MBOX_NULL) { + while (sys_arch_mbox_fetch(conn->recvmbox, &mem, 1) != SYS_ARCH_TIMEOUT) { + if (conn->type == NETCONN_TCP) { + pbuf_free((struct pbuf *)mem); + } else { + netbuf_delete((struct netbuf *)mem); + } + } + sys_mbox_free(conn->recvmbox); + conn->recvmbox = SYS_MBOX_NULL; + } + + + /* Drain the acceptmbox. */ + if (conn->acceptmbox != SYS_MBOX_NULL) { + while (sys_arch_mbox_fetch(conn->acceptmbox, &mem, 1) != SYS_ARCH_TIMEOUT) { + netconn_delete((struct netconn *)mem); + } + + sys_mbox_free(conn->acceptmbox); + conn->acceptmbox = SYS_MBOX_NULL; + } + + sys_mbox_free(conn->mbox); + conn->mbox = SYS_MBOX_NULL; + if (conn->sem != SYS_SEM_NULL) { + sys_sem_free(conn->sem); + } + /* conn->sem = SYS_SEM_NULL;*/ + memp_free(MEMP_NETCONN, conn); + return ERR_OK; +} + +enum netconn_type +netconn_type(struct netconn *conn) +{ + return conn->type; +} + +err_t +netconn_peer(struct netconn *conn, struct ip_addr *addr, + u16_t *port) +{ + switch (conn->type) { + case NETCONN_RAW: + /* return an error as connecting is only a helper for upper layers */ + return ERR_CONN; + case NETCONN_UDPLITE: + case NETCONN_UDPNOCHKSUM: + case NETCONN_UDP: + if (conn->pcb.udp == NULL || + ((conn->pcb.udp->flags & UDP_FLAGS_CONNECTED) == 0)) + return ERR_CONN; + *addr = (conn->pcb.udp->remote_ip); + *port = conn->pcb.udp->remote_port; + break; + case NETCONN_TCP: + if (conn->pcb.tcp == NULL) + return ERR_CONN; + *addr = (conn->pcb.tcp->remote_ip); + *port = conn->pcb.tcp->remote_port; + break; + } + return (conn->err = ERR_OK); +} + +err_t +netconn_addr(struct netconn *conn, struct ip_addr **addr, + u16_t *port) +{ + switch (conn->type) { + case NETCONN_RAW: + *addr = &(conn->pcb.raw->local_ip); + *port = conn->pcb.raw->protocol; + break; + case NETCONN_UDPLITE: + case NETCONN_UDPNOCHKSUM: + case NETCONN_UDP: + *addr = &(conn->pcb.udp->local_ip); + *port = conn->pcb.udp->local_port; + break; + case NETCONN_TCP: + *addr = &(conn->pcb.tcp->local_ip); + *port = conn->pcb.tcp->local_port; + break; + } + return (conn->err = ERR_OK); +} + +err_t +netconn_bind(struct netconn *conn, struct ip_addr *addr, + u16_t port) +{ + struct api_msg *msg; + + if (conn == NULL) { + return ERR_VAL; + } + + if (conn->type != NETCONN_TCP && + conn->recvmbox == SYS_MBOX_NULL) { + if ((conn->recvmbox = sys_mbox_new()) == SYS_MBOX_NULL) { + return ERR_MEM; + } + } + + if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) { + return (conn->err = ERR_MEM); + } + msg->type = API_MSG_BIND; + msg->msg.conn = conn; + msg->msg.msg.bc.ipaddr = addr; + msg->msg.msg.bc.port = port; + api_msg_post(msg); + sys_mbox_fetch(conn->mbox, NULL); + memp_free(MEMP_API_MSG, msg); + return conn->err; +} + + +err_t +netconn_connect(struct netconn *conn, struct ip_addr *addr, + u16_t port) +{ + struct api_msg *msg; + + if (conn == NULL) { + return ERR_VAL; + } + + + if (conn->recvmbox == SYS_MBOX_NULL) { + if ((conn->recvmbox = sys_mbox_new()) == SYS_MBOX_NULL) { + return ERR_MEM; + } + } + + if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) { + return ERR_MEM; + } + msg->type = API_MSG_CONNECT; + msg->msg.conn = conn; + msg->msg.msg.bc.ipaddr = addr; + msg->msg.msg.bc.port = port; + api_msg_post(msg); + sys_mbox_fetch(conn->mbox, NULL); + memp_free(MEMP_API_MSG, msg); + return conn->err; +} + +err_t +netconn_disconnect(struct netconn *conn) +{ + struct api_msg *msg; + + if (conn == NULL) { + return ERR_VAL; + } + + if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) { + return ERR_MEM; + } + msg->type = API_MSG_DISCONNECT; + msg->msg.conn = conn; + api_msg_post(msg); + sys_mbox_fetch(conn->mbox, NULL); + memp_free(MEMP_API_MSG, msg); + return conn->err; + +} + +err_t +netconn_listen(struct netconn *conn) +{ + struct api_msg *msg; + + if (conn == NULL) { + return ERR_VAL; + } + + if (conn->acceptmbox == SYS_MBOX_NULL) { + conn->acceptmbox = sys_mbox_new(); + if (conn->acceptmbox == SYS_MBOX_NULL) { + return ERR_MEM; + } + } + + if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) { + return (conn->err = ERR_MEM); + } + msg->type = API_MSG_LISTEN; + msg->msg.conn = conn; + api_msg_post(msg); + sys_mbox_fetch(conn->mbox, NULL); + memp_free(MEMP_API_MSG, msg); + return conn->err; +} + +struct netconn * +netconn_accept(struct netconn *conn) +{ + struct netconn *newconn; + + if (conn == NULL) { + return NULL; + } + + sys_mbox_fetch(conn->acceptmbox, (void **)&newconn); + /* Register event with callback */ + if (conn->callback) + (*conn->callback)(conn, NETCONN_EVT_RCVMINUS, 0); + + return newconn; +} + +struct netbuf * +netconn_recv(struct netconn *conn) +{ + struct api_msg *msg; + struct netbuf *buf; + struct pbuf *p; + u16_t len; + + if (conn == NULL) { + return NULL; + } + + if (conn->recvmbox == SYS_MBOX_NULL) { + conn->err = ERR_CONN; + return NULL; + } + + if (conn->err != ERR_OK) { + return NULL; + } + + if (conn->type == NETCONN_TCP) { + if (conn->pcb.tcp->state == LISTEN) { + conn->err = ERR_CONN; + return NULL; + } + + + buf = memp_malloc(MEMP_NETBUF); + + if (buf == NULL) { + conn->err = ERR_MEM; + return NULL; + } + + sys_mbox_fetch(conn->recvmbox, (void **)&p); + + if (p != NULL) + { + len = p->tot_len; + conn->recv_avail -= len; + } + else + len = 0; + + /* Register event with callback */ + if (conn->callback) + (*conn->callback)(conn, NETCONN_EVT_RCVMINUS, len); + + /* If we are closed, we indicate that we no longer wish to receive + data by setting conn->recvmbox to SYS_MBOX_NULL. */ + if (p == NULL) { + memp_free(MEMP_NETBUF, buf); + sys_mbox_free(conn->recvmbox); + conn->recvmbox = SYS_MBOX_NULL; + return NULL; + } + + buf->p = p; + buf->ptr = p; + buf->fromport = 0; + buf->fromaddr = NULL; + + /* Let the stack know that we have taken the data. */ + if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) { + conn->err = ERR_MEM; + return buf; + } + msg->type = API_MSG_RECV; + msg->msg.conn = conn; + if (buf != NULL) { + msg->msg.msg.len = buf->p->tot_len; + } else { + msg->msg.msg.len = 1; + } + api_msg_post(msg); + + sys_mbox_fetch(conn->mbox, NULL); + memp_free(MEMP_API_MSG, msg); + } else { + sys_mbox_fetch(conn->recvmbox, (void **)&buf); + conn->recv_avail -= buf->p->tot_len; + /* Register event with callback */ + if (conn->callback) + (*conn->callback)(conn, NETCONN_EVT_RCVMINUS, buf->p->tot_len); + } + + + + + LWIP_DEBUGF(API_LIB_DEBUG, ("netconn_recv: received %p (err %d)\n", (void *)buf, conn->err)); + + + return buf; +} + +err_t +netconn_send(struct netconn *conn, struct netbuf *buf) +{ + struct api_msg *msg; + + if (conn == NULL) { + return ERR_VAL; + } + + if (conn->err != ERR_OK) { + return conn->err; + } + + if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) { + return (conn->err = ERR_MEM); + } + + LWIP_DEBUGF(API_LIB_DEBUG, ("netconn_send: sending %d bytes\n", buf->p->tot_len)); + msg->type = API_MSG_SEND; + msg->msg.conn = conn; + msg->msg.msg.p = buf->p; + api_msg_post(msg); + + sys_mbox_fetch(conn->mbox, NULL); + memp_free(MEMP_API_MSG, msg); + return conn->err; +} + +err_t +netconn_write(struct netconn *conn, void *dataptr, u16_t size, u8_t copy) +{ + struct api_msg *msg; + u16_t len; + + if (conn == NULL) { + return ERR_VAL; + } + + if (conn->err != ERR_OK) { + return conn->err; + } + + if (conn->sem == SYS_SEM_NULL) { + conn->sem = sys_sem_new(0); + if (conn->sem == SYS_SEM_NULL) { + return ERR_MEM; + } + } + + if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) { + return (conn->err = ERR_MEM); + } + msg->type = API_MSG_WRITE; + msg->msg.conn = conn; + + + conn->state = NETCONN_WRITE; + while (conn->err == ERR_OK && size > 0) { + msg->msg.msg.w.dataptr = dataptr; + msg->msg.msg.w.copy = copy; + + if (conn->type == NETCONN_TCP) { + if (tcp_sndbuf(conn->pcb.tcp) == 0) { + sys_sem_wait(conn->sem); + if (conn->err != ERR_OK) { + goto ret; + } + } + if (size > tcp_sndbuf(conn->pcb.tcp)) { + /* We cannot send more than one send buffer's worth of data at a + time. */ + len = tcp_sndbuf(conn->pcb.tcp); + } else { + len = size; + } + } else { + len = size; + } + + LWIP_DEBUGF(API_LIB_DEBUG, ("netconn_write: writing %d bytes (%d)\n", len, copy)); + msg->msg.msg.w.len = len; + api_msg_post(msg); + sys_mbox_fetch(conn->mbox, NULL); + if (conn->err == ERR_OK) { + dataptr = (void *)((char *)dataptr + len); + size -= len; + } else if (conn->err == ERR_MEM) { + conn->err = ERR_OK; + sys_sem_wait(conn->sem); + } else { + goto ret; + } + } + ret: + memp_free(MEMP_API_MSG, msg); + conn->state = NETCONN_NONE; + if (conn->sem != SYS_SEM_NULL) { + sys_sem_free(conn->sem); + conn->sem = SYS_SEM_NULL; + } + + return conn->err; +} + +err_t +netconn_close(struct netconn *conn) +{ + struct api_msg *msg; + + if (conn == NULL) { + return ERR_VAL; + } + if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) { + return (conn->err = ERR_MEM); + } + + conn->state = NETCONN_CLOSE; + again: + msg->type = API_MSG_CLOSE; + msg->msg.conn = conn; + api_msg_post(msg); + sys_mbox_fetch(conn->mbox, NULL); + if (conn->err == ERR_MEM && + conn->sem != SYS_SEM_NULL) { + sys_sem_wait(conn->sem); + goto again; + } + conn->state = NETCONN_NONE; + memp_free(MEMP_API_MSG, msg); + return conn->err; +} + +err_t +netconn_err(struct netconn *conn) +{ + return conn->err; +} +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/api/api_msg.c @@ -0,0 +1,800 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + +#include "lwip/opt.h" +#include "lwip/arch.h" +#include "lwip/api_msg.h" +#include "lwip/memp.h" +#include "lwip/sys.h" +#include "lwip/tcpip.h" + +#if LWIP_RAW +static int +recv_raw(void *arg, struct raw_pcb *pcb, struct pbuf *p, + struct ip_addr *addr) +{ + struct netbuf *buf; + struct netconn *conn; + + conn = arg; + if (!conn) return 0; + + if (conn->recvmbox != SYS_MBOX_NULL) { + if (!(buf = memp_malloc(MEMP_NETBUF))) { + return 0; + } + pbuf_ref(p); + buf->p = p; + buf->ptr = p; + buf->fromaddr = addr; + buf->fromport = pcb->protocol; + + conn->recv_avail += p->tot_len; + /* Register event with callback */ + if (conn->callback) + (*conn->callback)(conn, NETCONN_EVT_RCVPLUS, p->tot_len); + sys_mbox_post(conn->recvmbox, buf); + } + + return 0; /* do not eat the packet */ +} +#endif +#if LWIP_UDP +static void +recv_udp(void *arg, struct udp_pcb *pcb, struct pbuf *p, + struct ip_addr *addr, u16_t port) +{ + struct netbuf *buf; + struct netconn *conn; + + conn = arg; + + if (conn == NULL) { + pbuf_free(p); + return; + } + if (conn->recvmbox != SYS_MBOX_NULL) { + buf = memp_malloc(MEMP_NETBUF); + if (buf == NULL) { + pbuf_free(p); + return; + } else { + buf->p = p; + buf->ptr = p; + buf->fromaddr = addr; + buf->fromport = port; + } + + conn->recv_avail += p->tot_len; + /* Register event with callback */ + if (conn->callback) + (*conn->callback)(conn, NETCONN_EVT_RCVPLUS, p->tot_len); + sys_mbox_post(conn->recvmbox, buf); + } +} +#endif /* LWIP_UDP */ +#if LWIP_TCP + +static err_t +recv_tcp(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err) +{ + struct netconn *conn; + u16_t len; + + conn = arg; + + if (conn == NULL) { + pbuf_free(p); + return ERR_VAL; + } + + if (conn->recvmbox != SYS_MBOX_NULL) { + + conn->err = err; + if (p != NULL) { + len = p->tot_len; + conn->recv_avail += len; + } + else + len = 0; + /* Register event with callback */ + if (conn->callback) + (*conn->callback)(conn, NETCONN_EVT_RCVPLUS, len); + sys_mbox_post(conn->recvmbox, p); + } + return ERR_OK; +} + + +static err_t +poll_tcp(void *arg, struct tcp_pcb *pcb) +{ + struct netconn *conn; + + conn = arg; + if (conn != NULL && + (conn->state == NETCONN_WRITE || conn->state == NETCONN_CLOSE) && + conn->sem != SYS_SEM_NULL) { + sys_sem_signal(conn->sem); + } + return ERR_OK; +} + +static err_t +sent_tcp(void *arg, struct tcp_pcb *pcb, u16_t len) +{ + struct netconn *conn; + + conn = arg; + if (conn != NULL && conn->sem != SYS_SEM_NULL) { + sys_sem_signal(conn->sem); + } + + if (conn && conn->callback) + if (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT) + (*conn->callback)(conn, NETCONN_EVT_SENDPLUS, len); + + return ERR_OK; +} + +static void +err_tcp(void *arg, err_t err) +{ + struct netconn *conn; + + conn = arg; + + conn->pcb.tcp = NULL; + + + conn->err = err; + if (conn->recvmbox != SYS_MBOX_NULL) { + /* Register event with callback */ + if (conn->callback) + (*conn->callback)(conn, NETCONN_EVT_RCVPLUS, 0); + sys_mbox_post(conn->recvmbox, NULL); + } + if (conn->mbox != SYS_MBOX_NULL) { + sys_mbox_post(conn->mbox, NULL); + } + if (conn->acceptmbox != SYS_MBOX_NULL) { + /* Register event with callback */ + if (conn->callback) + (*conn->callback)(conn, NETCONN_EVT_RCVPLUS, 0); + sys_mbox_post(conn->acceptmbox, NULL); + } + if (conn->sem != SYS_SEM_NULL) { + sys_sem_signal(conn->sem); + } +} + +static void +setup_tcp(struct netconn *conn) +{ + struct tcp_pcb *pcb; + + pcb = conn->pcb.tcp; + tcp_arg(pcb, conn); + tcp_recv(pcb, recv_tcp); + tcp_sent(pcb, sent_tcp); + tcp_poll(pcb, poll_tcp, 4); + tcp_err(pcb, err_tcp); +} + +static err_t +accept_function(void *arg, struct tcp_pcb *newpcb, err_t err) +{ + sys_mbox_t mbox; + struct netconn *newconn; + struct netconn *conn; + +#if API_MSG_DEBUG +#if TCP_DEBUG + tcp_debug_print_state(newpcb->state); +#endif /* TCP_DEBUG */ +#endif /* API_MSG_DEBUG */ + conn = (struct netconn *)arg; + mbox = conn->acceptmbox; + newconn = memp_malloc(MEMP_NETCONN); + if (newconn == NULL) { + return ERR_MEM; + } + newconn->type = NETCONN_TCP; + newconn->pcb.tcp = newpcb; + setup_tcp(newconn); + newconn->recvmbox = sys_mbox_new(); + if (newconn->recvmbox == SYS_MBOX_NULL) { + memp_free(MEMP_NETCONN, newconn); + return ERR_MEM; + } + newconn->mbox = sys_mbox_new(); + if (newconn->mbox == SYS_MBOX_NULL) { + sys_mbox_free(newconn->recvmbox); + memp_free(MEMP_NETCONN, newconn); + return ERR_MEM; + } + newconn->sem = sys_sem_new(0); + if (newconn->sem == SYS_SEM_NULL) { + sys_mbox_free(newconn->recvmbox); + sys_mbox_free(newconn->mbox); + memp_free(MEMP_NETCONN, newconn); + return ERR_MEM; + } + newconn->acceptmbox = SYS_MBOX_NULL; + newconn->err = err; + /* Register event with callback */ + if (conn->callback) + { + (*conn->callback)(conn, NETCONN_EVT_RCVPLUS, 0); + /* We have to set the callback here even though + * the new socket is unknown. Mark the socket as -1. */ + newconn->callback = conn->callback; + newconn->socket = -1; + } + + sys_mbox_post(mbox, newconn); + return ERR_OK; +} +#endif /* LWIP_TCP */ + +static void +do_newconn(struct api_msg_msg *msg) +{ + if(msg->conn->pcb.tcp != NULL) { + /* This "new" connection already has a PCB allocated. */ + /* Is this an error condition? Should it be deleted? + We currently just are happy and return. */ + sys_mbox_post(msg->conn->mbox, NULL); + return; + } + + msg->conn->err = ERR_OK; + + /* Allocate a PCB for this connection */ + switch(msg->conn->type) { +#if LWIP_RAW + case NETCONN_RAW: + msg->conn->pcb.raw = raw_new(msg->msg.bc.port); /* misusing the port field */ + raw_recv(msg->conn->pcb.raw, recv_raw, msg->conn); + break; +#endif +#if LWIP_UDP + case NETCONN_UDPLITE: + msg->conn->pcb.udp = udp_new(); + if(msg->conn->pcb.udp == NULL) { + msg->conn->err = ERR_MEM; + break; + } + udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_UDPLITE); + udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn); + break; + case NETCONN_UDPNOCHKSUM: + msg->conn->pcb.udp = udp_new(); + if(msg->conn->pcb.udp == NULL) { + msg->conn->err = ERR_MEM; + break; + } + udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_NOCHKSUM); + udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn); + break; + case NETCONN_UDP: + msg->conn->pcb.udp = udp_new(); + if(msg->conn->pcb.udp == NULL) { + msg->conn->err = ERR_MEM; + break; + } + udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn); + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + msg->conn->pcb.tcp = tcp_new(); + if(msg->conn->pcb.tcp == NULL) { + msg->conn->err = ERR_MEM; + break; + } + setup_tcp(msg->conn); + break; +#endif + } + + + sys_mbox_post(msg->conn->mbox, NULL); +} + + +static void +do_delconn(struct api_msg_msg *msg) +{ + if (msg->conn->pcb.tcp != NULL) { + switch (msg->conn->type) { +#if LWIP_RAW + case NETCONN_RAW: + raw_remove(msg->conn->pcb.raw); + break; +#endif +#if LWIP_UDP + case NETCONN_UDPLITE: + /* FALLTHROUGH */ + case NETCONN_UDPNOCHKSUM: + /* FALLTHROUGH */ + case NETCONN_UDP: + msg->conn->pcb.udp->recv_arg = NULL; + udp_remove(msg->conn->pcb.udp); + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + if (msg->conn->pcb.tcp->state == LISTEN) { + tcp_arg(msg->conn->pcb.tcp, NULL); + tcp_accept(msg->conn->pcb.tcp, NULL); + tcp_close(msg->conn->pcb.tcp); + } else { + tcp_arg(msg->conn->pcb.tcp, NULL); + tcp_sent(msg->conn->pcb.tcp, NULL); + tcp_recv(msg->conn->pcb.tcp, NULL); + tcp_poll(msg->conn->pcb.tcp, NULL, 0); + tcp_err(msg->conn->pcb.tcp, NULL); + if (tcp_close(msg->conn->pcb.tcp) != ERR_OK) { + tcp_abort(msg->conn->pcb.tcp); + } + } +#endif + default: + break; + } + } + /* Trigger select() in socket layer */ + if (msg->conn->callback) + { + (*msg->conn->callback)(msg->conn, NETCONN_EVT_RCVPLUS, 0); + (*msg->conn->callback)(msg->conn, NETCONN_EVT_SENDPLUS, 0); + } + + if (msg->conn->mbox != SYS_MBOX_NULL) { + sys_mbox_post(msg->conn->mbox, NULL); + } +} + +static void +do_bind(struct api_msg_msg *msg) +{ + if (msg->conn->pcb.tcp == NULL) { + switch (msg->conn->type) { +#if LWIP_RAW + case NETCONN_RAW: + msg->conn->pcb.raw = raw_new(msg->msg.bc.port); /* misusing the port field as protocol */ + raw_recv(msg->conn->pcb.raw, recv_raw, msg->conn); + break; +#endif +#if LWIP_UDP + case NETCONN_UDPLITE: + msg->conn->pcb.udp = udp_new(); + udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_UDPLITE); + udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn); + break; + case NETCONN_UDPNOCHKSUM: + msg->conn->pcb.udp = udp_new(); + udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_NOCHKSUM); + udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn); + break; + case NETCONN_UDP: + msg->conn->pcb.udp = udp_new(); + udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn); + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + msg->conn->pcb.tcp = tcp_new(); + setup_tcp(msg->conn); +#endif /* LWIP_TCP */ + default: + break; + } + } + switch (msg->conn->type) { +#if LWIP_RAW + case NETCONN_RAW: + msg->conn->err = raw_bind(msg->conn->pcb.raw,msg->msg.bc.ipaddr); + break; +#endif +#if LWIP_UDP + case NETCONN_UDPLITE: + /* FALLTHROUGH */ + case NETCONN_UDPNOCHKSUM: + /* FALLTHROUGH */ + case NETCONN_UDP: + msg->conn->err = udp_bind(msg->conn->pcb.udp, msg->msg.bc.ipaddr, msg->msg.bc.port); + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + msg->conn->err = tcp_bind(msg->conn->pcb.tcp, + msg->msg.bc.ipaddr, msg->msg.bc.port); +#endif /* LWIP_TCP */ + default: + break; + } + sys_mbox_post(msg->conn->mbox, NULL); +} +#if LWIP_TCP + +static err_t +do_connected(void *arg, struct tcp_pcb *pcb, err_t err) +{ + struct netconn *conn; + + conn = arg; + + if (conn == NULL) { + return ERR_VAL; + } + + conn->err = err; + if (conn->type == NETCONN_TCP && err == ERR_OK) { + setup_tcp(conn); + } + sys_mbox_post(conn->mbox, NULL); + return ERR_OK; +} +#endif + +static void +do_connect(struct api_msg_msg *msg) +{ + if (msg->conn->pcb.tcp == NULL) { + switch (msg->conn->type) { +#if LWIP_RAW + case NETCONN_RAW: + msg->conn->pcb.raw = raw_new(msg->msg.bc.port); /* misusing the port field as protocol */ + raw_recv(msg->conn->pcb.raw, recv_raw, msg->conn); + break; +#endif +#if LWIP_UDP + case NETCONN_UDPLITE: + msg->conn->pcb.udp = udp_new(); + if (msg->conn->pcb.udp == NULL) { + msg->conn->err = ERR_MEM; + sys_mbox_post(msg->conn->mbox, NULL); + return; + } + udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_UDPLITE); + udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn); + break; + case NETCONN_UDPNOCHKSUM: + msg->conn->pcb.udp = udp_new(); + if (msg->conn->pcb.udp == NULL) { + msg->conn->err = ERR_MEM; + sys_mbox_post(msg->conn->mbox, NULL); + return; + } + udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_NOCHKSUM); + udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn); + break; + case NETCONN_UDP: + msg->conn->pcb.udp = udp_new(); + if (msg->conn->pcb.udp == NULL) { + msg->conn->err = ERR_MEM; + sys_mbox_post(msg->conn->mbox, NULL); + return; + } + udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn); + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + msg->conn->pcb.tcp = tcp_new(); + if (msg->conn->pcb.tcp == NULL) { + msg->conn->err = ERR_MEM; + sys_mbox_post(msg->conn->mbox, NULL); + return; + } +#endif + default: + break; + } + } + switch (msg->conn->type) { +#if LWIP_RAW + case NETCONN_RAW: + raw_connect(msg->conn->pcb.raw, msg->msg.bc.ipaddr); + sys_mbox_post(msg->conn->mbox, NULL); + break; +#endif +#if LWIP_UDP + case NETCONN_UDPLITE: + /* FALLTHROUGH */ + case NETCONN_UDPNOCHKSUM: + /* FALLTHROUGH */ + case NETCONN_UDP: + udp_connect(msg->conn->pcb.udp, msg->msg.bc.ipaddr, msg->msg.bc.port); + sys_mbox_post(msg->conn->mbox, NULL); + break; +#endif +#if LWIP_TCP + case NETCONN_TCP: + /* tcp_arg(msg->conn->pcb.tcp, msg->conn);*/ + setup_tcp(msg->conn); + tcp_connect(msg->conn->pcb.tcp, msg->msg.bc.ipaddr, msg->msg.bc.port, + do_connected); + /*tcp_output(msg->conn->pcb.tcp);*/ +#endif + + default: + break; + } +} + +static void +do_disconnect(struct api_msg_msg *msg) +{ + + switch (msg->conn->type) { +#if LWIP_RAW + case NETCONN_RAW: + /* Do nothing as connecting is only a helper for upper lwip layers */ + break; +#endif +#if LWIP_UDP + case NETCONN_UDPLITE: + /* FALLTHROUGH */ + case NETCONN_UDPNOCHKSUM: + /* FALLTHROUGH */ + case NETCONN_UDP: + udp_disconnect(msg->conn->pcb.udp); + break; +#endif + case NETCONN_TCP: + break; + } + sys_mbox_post(msg->conn->mbox, NULL); +} + + +static void +do_listen(struct api_msg_msg *msg) +{ + if (msg->conn->pcb.tcp != NULL) { + switch (msg->conn->type) { +#if LWIP_RAW + case NETCONN_RAW: + LWIP_DEBUGF(API_MSG_DEBUG, ("api_msg: listen RAW: cannot listen for RAW.\n")); + break; +#endif +#if LWIP_UDP + case NETCONN_UDPLITE: + /* FALLTHROUGH */ + case NETCONN_UDPNOCHKSUM: + /* FALLTHROUGH */ + case NETCONN_UDP: + LWIP_DEBUGF(API_MSG_DEBUG, ("api_msg: listen UDP: cannot listen for UDP.\n")); + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + msg->conn->pcb.tcp = tcp_listen(msg->conn->pcb.tcp); + if (msg->conn->pcb.tcp == NULL) { + msg->conn->err = ERR_MEM; + } else { + if (msg->conn->acceptmbox == SYS_MBOX_NULL) { + msg->conn->acceptmbox = sys_mbox_new(); + if (msg->conn->acceptmbox == SYS_MBOX_NULL) { + msg->conn->err = ERR_MEM; + break; + } + } + tcp_arg(msg->conn->pcb.tcp, msg->conn); + tcp_accept(msg->conn->pcb.tcp, accept_function); + } +#endif + default: + break; + } + } + sys_mbox_post(msg->conn->mbox, NULL); +} + +static void +do_accept(struct api_msg_msg *msg) +{ + if (msg->conn->pcb.tcp != NULL) { + switch (msg->conn->type) { +#if LWIP_RAW + case NETCONN_RAW: + LWIP_DEBUGF(API_MSG_DEBUG, ("api_msg: accept RAW: cannot accept for RAW.\n")); + break; +#endif +#if LWIP_UDP + case NETCONN_UDPLITE: + /* FALLTHROUGH */ + case NETCONN_UDPNOCHKSUM: + /* FALLTHROUGH */ + case NETCONN_UDP: + LWIP_DEBUGF(API_MSG_DEBUG, ("api_msg: accept UDP: cannot accept for UDP.\n")); + break; +#endif /* LWIP_UDP */ + case NETCONN_TCP: + break; + } + } +} + +static void +do_send(struct api_msg_msg *msg) +{ + if (msg->conn->pcb.tcp != NULL) { + switch (msg->conn->type) { +#if LWIP_RAW + case NETCONN_RAW: + raw_send(msg->conn->pcb.raw, msg->msg.p); + break; +#endif +#if LWIP_UDP + case NETCONN_UDPLITE: + /* FALLTHROUGH */ + case NETCONN_UDPNOCHKSUM: + /* FALLTHROUGH */ + case NETCONN_UDP: + udp_send(msg->conn->pcb.udp, msg->msg.p); + break; +#endif /* LWIP_UDP */ + case NETCONN_TCP: + break; + } + } + sys_mbox_post(msg->conn->mbox, NULL); +} + +static void +do_recv(struct api_msg_msg *msg) +{ +#if LWIP_TCP + if (msg->conn->pcb.tcp != NULL) { + if (msg->conn->type == NETCONN_TCP) { + tcp_recved(msg->conn->pcb.tcp, msg->msg.len); + } + } +#endif + sys_mbox_post(msg->conn->mbox, NULL); +} + +static void +do_write(struct api_msg_msg *msg) +{ +#if LWIP_TCP + err_t err; +#endif + if (msg->conn->pcb.tcp != NULL) { + switch (msg->conn->type) { +#if LWIP_RAW + case NETCONN_RAW: + msg->conn->err = ERR_VAL; + break; +#endif +#if LWIP_UDP + case NETCONN_UDPLITE: + /* FALLTHROUGH */ + case NETCONN_UDPNOCHKSUM: + /* FALLTHROUGH */ + case NETCONN_UDP: + msg->conn->err = ERR_VAL; + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + err = tcp_write(msg->conn->pcb.tcp, msg->msg.w.dataptr, + msg->msg.w.len, msg->msg.w.copy); + /* This is the Nagle algorithm: inhibit the sending of new TCP + segments when new outgoing data arrives from the user if any + previously transmitted data on the connection remains + unacknowledged. */ + if(err == ERR_OK && (msg->conn->pcb.tcp->unacked == NULL || (msg->conn->pcb.tcp->flags & TF_NODELAY)) ) { + tcp_output(msg->conn->pcb.tcp); + } + msg->conn->err = err; + if (msg->conn->callback) + if (err == ERR_OK) + { + if (tcp_sndbuf(msg->conn->pcb.tcp) <= TCP_SNDLOWAT) + (*msg->conn->callback)(msg->conn, NETCONN_EVT_SENDMINUS, msg->msg.w.len); + } +#endif + default: + break; + } + } + sys_mbox_post(msg->conn->mbox, NULL); +} + +static void +do_close(struct api_msg_msg *msg) +{ + err_t err; + + err = ERR_OK; + + if (msg->conn->pcb.tcp != NULL) { + switch (msg->conn->type) { +#if LWIP_RAW + case NETCONN_RAW: + break; +#endif +#if LWIP_UDP + case NETCONN_UDPLITE: + /* FALLTHROUGH */ + case NETCONN_UDPNOCHKSUM: + /* FALLTHROUGH */ + case NETCONN_UDP: + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + if (msg->conn->pcb.tcp->state == LISTEN) { + err = tcp_close(msg->conn->pcb.tcp); + } + msg->conn->err = err; +#endif + default: + break; + } + } + sys_mbox_post(msg->conn->mbox, NULL); +} + +typedef void (* api_msg_decode)(struct api_msg_msg *msg); +static api_msg_decode decode[API_MSG_MAX] = { + do_newconn, + do_delconn, + do_bind, + do_connect, + do_disconnect, + do_listen, + do_accept, + do_send, + do_recv, + do_write, + do_close + }; +void +api_msg_input(struct api_msg *msg) +{ + decode[msg->type](&(msg->msg)); +} + +void +api_msg_post(struct api_msg *msg) +{ + tcpip_apimsg(msg); +} + + +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/api/err.c @@ -0,0 +1,59 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + +#include "lwip/err.h" + +#ifdef LWIP_DEBUG + +static char *err_strerr[] = {"Ok.", + "Out of memory error.", + "Buffer error.", + "Connection aborted.", + "Connection reset.", + "Connection closed.", + "Not connected.", + "Illegal value.", + "Illegal argument.", + "Routing problem.", + "Address in use." +}; + + +char * +lwip_strerr(err_t err) +{ + return err_strerr[-err]; + +} + + +#endif /* LWIP_DEBUG */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/api/sockets.c @@ -0,0 +1,1357 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + * Improved by Marc Boucher <marc@mbsi.ca> and David Haas <dhaas@alum.rpi.edu> + * + */ + +#include "lwip/opt.h" +#include "lwip/api.h" +#include "lwip/arch.h" +#include "lwip/sys.h" + +#define LWIP_TIMEVAL_PRIVATE +#include "lwip/sockets.h" + +#define NUM_SOCKETS MEMP_NUM_NETCONN + +struct lwip_socket { + struct netconn *conn; + struct netbuf *lastdata; + u16_t lastoffset; + u16_t rcvevent; + u16_t sendevent; + u16_t flags; + int err; +}; + +struct lwip_select_cb +{ + struct lwip_select_cb *next; + fd_set *readset; + fd_set *writeset; + fd_set *exceptset; + int sem_signalled; + sys_sem_t sem; +}; + +static struct lwip_socket sockets[NUM_SOCKETS]; +static struct lwip_select_cb *select_cb_list = 0; + +static sys_sem_t socksem = 0; +static sys_sem_t selectsem = 0; + +static void +event_callback(struct netconn *conn, enum netconn_evt evt, u16_t len); + +static int err_to_errno_table[11] = { + 0, /* ERR_OK 0 No error, everything OK. */ + ENOMEM, /* ERR_MEM -1 Out of memory error. */ + ENOBUFS, /* ERR_BUF -2 Buffer error. */ + ECONNABORTED, /* ERR_ABRT -3 Connection aborted. */ + ECONNRESET, /* ERR_RST -4 Connection reset. */ + ESHUTDOWN, /* ERR_CLSD -5 Connection closed. */ + ENOTCONN, /* ERR_CONN -6 Not connected. */ + EINVAL, /* ERR_VAL -7 Illegal value. */ + EIO, /* ERR_ARG -8 Illegal argument. */ + EHOSTUNREACH, /* ERR_RTE -9 Routing problem. */ + EADDRINUSE /* ERR_USE -10 Address in use. */ +}; + +#define err_to_errno(err) \ + ((err) < (sizeof(err_to_errno_table)/sizeof(int))) ? \ + err_to_errno_table[-(err)] : EIO + +#ifdef ERRNO +#define set_errno(err) errno = (err) +#else +#define set_errno(err) +#endif + +#define sock_set_errno(sk, e) do { \ + sk->err = (e); \ + set_errno(sk->err); \ +} while (0) + + +static struct lwip_socket * +get_socket(int s) +{ + struct lwip_socket *sock; + + if ((s < 0) || (s > NUM_SOCKETS)) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("get_socket(%d): invalid\n", s)); + set_errno(EBADF); + return NULL; + } + + sock = &sockets[s]; + + if (!sock->conn) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("get_socket(%d): not active\n", s)); + set_errno(EBADF); + return NULL; + } + + return sock; +} + +static int +alloc_socket(struct netconn *newconn) +{ + int i; + + if (!socksem) + socksem = sys_sem_new(1); + + /* Protect socket array */ + sys_sem_wait(socksem); + + /* allocate a new socket identifier */ + for(i = 0; i < NUM_SOCKETS; ++i) { + if (!sockets[i].conn) { + sockets[i].conn = newconn; + sockets[i].lastdata = NULL; + sockets[i].lastoffset = 0; + sockets[i].rcvevent = 0; + sockets[i].sendevent = 1; /* TCP send buf is empty */ + sockets[i].flags = 0; + sockets[i].err = 0; + sys_sem_signal(socksem); + return i; + } + } + sys_sem_signal(socksem); + return -1; +} + +int +lwip_accept(int s, struct sockaddr *addr, socklen_t *addrlen) +{ + struct lwip_socket *sock; + struct netconn *newconn; + struct ip_addr naddr; + u16_t port; + int newsock; + struct sockaddr_in sin; + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d)...\n", s)); + sock = get_socket(s); + if (!sock) { + set_errno(EBADF); + return -1; + } + + newconn = netconn_accept(sock->conn); + + /* get the IP address and port of the remote host */ + netconn_peer(newconn, &naddr, &port); + + memset(&sin, 0, sizeof(sin)); + sin.sin_len = sizeof(sin); + sin.sin_family = AF_INET; + sin.sin_port = htons(port); + sin.sin_addr.s_addr = naddr.addr; + + if (*addrlen > sizeof(sin)) + *addrlen = sizeof(sin); + + memcpy(addr, &sin, *addrlen); + + newsock = alloc_socket(newconn); + if (newsock == -1) { + netconn_delete(newconn); + sock_set_errno(sock, ENOBUFS); + return -1; + } + newconn->callback = event_callback; + sock = get_socket(newsock); + + sys_sem_wait(socksem); + sock->rcvevent += -1 - newconn->socket; + newconn->socket = newsock; + sys_sem_signal(socksem); + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d) returning new sock=%d addr=", s, newsock)); + ip_addr_debug_print(SOCKETS_DEBUG, &naddr); + LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%u\n", port)); + + sock_set_errno(sock, 0); + return newsock; +} + +int +lwip_bind(int s, struct sockaddr *name, socklen_t namelen) +{ + struct lwip_socket *sock; + struct ip_addr local_addr; + u16_t local_port; + err_t err; + + sock = get_socket(s); + if (!sock) { + set_errno(EBADF); + return -1; + } + + local_addr.addr = ((struct sockaddr_in *)name)->sin_addr.s_addr; + local_port = ((struct sockaddr_in *)name)->sin_port; + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_bind(%d, addr=", s)); + ip_addr_debug_print(SOCKETS_DEBUG, &local_addr); + LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%u)\n", ntohs(local_port))); + + err = netconn_bind(sock->conn, &local_addr, ntohs(local_port)); + + if (err != ERR_OK) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_bind(%d) failed, err=%d\n", s, err)); + sock_set_errno(sock, err_to_errno(err)); + return -1; + } + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_bind(%d) succeeded\n", s)); + sock_set_errno(sock, 0); + return 0; +} + +int +lwip_close(int s) +{ + struct lwip_socket *sock; + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_close(%d)\n", s)); + if (!socksem) + socksem = sys_sem_new(1); + + /* We cannot allow multiple closes of the same socket. */ + sys_sem_wait(socksem); + + sock = get_socket(s); + if (!sock) { + sys_sem_signal(socksem); + set_errno(EBADF); + return -1; + } + + netconn_delete(sock->conn); + if (sock->lastdata) { + netbuf_delete(sock->lastdata); + } + sock->lastdata = NULL; + sock->lastoffset = 0; + sock->conn = NULL; + sys_sem_signal(socksem); + sock_set_errno(sock, 0); + return 0; +} + +int +lwip_connect(int s, struct sockaddr *name, socklen_t namelen) +{ + struct lwip_socket *sock; + err_t err; + + sock = get_socket(s); + if (!sock) { + set_errno(EBADF); + return -1; + } + + if (((struct sockaddr_in *)name)->sin_family == AF_UNSPEC) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d, AF_UNSPEC)\n", s)); + err = netconn_disconnect(sock->conn); + } else { + struct ip_addr remote_addr; + u16_t remote_port; + + remote_addr.addr = ((struct sockaddr_in *)name)->sin_addr.s_addr; + remote_port = ((struct sockaddr_in *)name)->sin_port; + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d, addr=", s)); + ip_addr_debug_print(SOCKETS_DEBUG, &remote_addr); + LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%u)\n", ntohs(remote_port))); + + err = netconn_connect(sock->conn, &remote_addr, ntohs(remote_port)); + } + + if (err != ERR_OK) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d) failed, err=%d\n", s, err)); + sock_set_errno(sock, err_to_errno(err)); + return -1; + } + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d) succeeded\n", s)); + sock_set_errno(sock, 0); + return 0; +} + +int +lwip_listen(int s, int backlog) +{ + struct lwip_socket *sock; + err_t err; + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_listen(%d, backlog=%d)\n", s, backlog)); + sock = get_socket(s); + if (!sock) { + set_errno(EBADF); + return -1; + } + + err = netconn_listen(sock->conn); + + if (err != ERR_OK) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_listen(%d) failed, err=%d\n", s, err)); + sock_set_errno(sock, err_to_errno(err)); + return -1; + } + + sock_set_errno(sock, 0); + return 0; +} + +int +lwip_recvfrom(int s, void *mem, int len, unsigned int flags, + struct sockaddr *from, socklen_t *fromlen) +{ + struct lwip_socket *sock; + struct netbuf *buf; + u16_t buflen, copylen; + struct ip_addr *addr; + u16_t port; + + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d, %p, %d, 0x%x, ..)\n", s, mem, len, flags)); + sock = get_socket(s); + if (!sock) { + set_errno(EBADF); + return -1; + } + + /* Check if there is data left from the last recv operation. */ + if (sock->lastdata) { + buf = sock->lastdata; + } else { + /* If this is non-blocking call, then check first */ + if (((flags & MSG_DONTWAIT) || (sock->flags & O_NONBLOCK)) + && !sock->rcvevent) + { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d): returning EWOULDBLOCK\n", s)); + sock_set_errno(sock, EWOULDBLOCK); + return -1; + } + + /* No data was left from the previous operation, so we try to get + some from the network. */ + buf = netconn_recv(sock->conn); + + if (!buf) { + /* We should really do some error checking here. */ + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d): buf == NULL!\n", s)); + sock_set_errno(sock, 0); + return 0; + } + } + + buflen = netbuf_len(buf); + + buflen -= sock->lastoffset; + + if (len > buflen) { + copylen = buflen; + } else { + copylen = len; + } + + /* copy the contents of the received buffer into + the supplied memory pointer mem */ + netbuf_copy_partial(buf, mem, copylen, sock->lastoffset); + + /* Check to see from where the data was. */ + if (from && fromlen) { + struct sockaddr_in sin; + + addr = netbuf_fromaddr(buf); + port = netbuf_fromport(buf); + + memset(&sin, 0, sizeof(sin)); + sin.sin_len = sizeof(sin); + sin.sin_family = AF_INET; + sin.sin_port = htons(port); + sin.sin_addr.s_addr = addr->addr; + + if (*fromlen > sizeof(sin)) + *fromlen = sizeof(sin); + + memcpy(from, &sin, *fromlen); + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d): addr=", s)); + ip_addr_debug_print(SOCKETS_DEBUG, addr); + LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%u len=%u\n", port, copylen)); + } else { +#if SOCKETS_DEBUG > 0 + addr = netbuf_fromaddr(buf); + port = netbuf_fromport(buf); + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d): addr=", s)); + ip_addr_debug_print(SOCKETS_DEBUG, addr); + LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%u len=%u\n", port, copylen)); +#endif + + } + + /* If this is a TCP socket, check if there is data left in the + buffer. If so, it should be saved in the sock structure for next + time around. */ + if (netconn_type(sock->conn) == NETCONN_TCP && buflen - copylen > 0) { + sock->lastdata = buf; + sock->lastoffset += copylen; + } else { + sock->lastdata = NULL; + sock->lastoffset = 0; + netbuf_delete(buf); + } + + + sock_set_errno(sock, 0); + return copylen; +} + +int +lwip_read(int s, void *mem, int len) +{ + return lwip_recvfrom(s, mem, len, 0, NULL, NULL); +} + +int +lwip_recv(int s, void *mem, int len, unsigned int flags) +{ + return lwip_recvfrom(s, mem, len, flags, NULL, NULL); +} + +int +lwip_send(int s, void *data, int size, unsigned int flags) +{ + struct lwip_socket *sock; + struct netbuf *buf; + err_t err; + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_send(%d, data=%p, size=%d, flags=0x%x)\n", s, data, size, flags)); + + sock = get_socket(s); + if (!sock) { + set_errno(EBADF); + return -1; + } + + switch (netconn_type(sock->conn)) { + case NETCONN_RAW: + case NETCONN_UDP: + case NETCONN_UDPLITE: + case NETCONN_UDPNOCHKSUM: + /* create a buffer */ + buf = netbuf_new(); + + if (!buf) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_send(%d) ENOBUFS\n", s)); + sock_set_errno(sock, ENOBUFS); + return -1; + } + + /* make the buffer point to the data that should + be sent */ + netbuf_ref(buf, data, size); + + /* send the data */ + err = netconn_send(sock->conn, buf); + + /* deallocated the buffer */ + netbuf_delete(buf); + break; + case NETCONN_TCP: + err = netconn_write(sock->conn, data, size, NETCONN_COPY); + break; + default: + err = ERR_ARG; + break; + } + if (err != ERR_OK) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_send(%d) err=%d\n", s, err)); + sock_set_errno(sock, err_to_errno(err)); + return -1; + } + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_send(%d) ok size=%d\n", s, size)); + sock_set_errno(sock, 0); + return size; +} + +int +lwip_sendto(int s, void *data, int size, unsigned int flags, + struct sockaddr *to, socklen_t tolen) +{ + struct lwip_socket *sock; + struct ip_addr remote_addr, addr; + u16_t remote_port, port; + int ret,connected; + + sock = get_socket(s); + if (!sock) { + set_errno(EBADF); + return -1; + } + + /* get the peer if currently connected */ + connected = (netconn_peer(sock->conn, &addr, &port) == ERR_OK); + + remote_addr.addr = ((struct sockaddr_in *)to)->sin_addr.s_addr; + remote_port = ((struct sockaddr_in *)to)->sin_port; + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_sendto(%d, data=%p, size=%d, flags=0x%x to=", s, data, size, flags)); + ip_addr_debug_print(SOCKETS_DEBUG, &remote_addr); + LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%u\n", ntohs(remote_port))); + + netconn_connect(sock->conn, &remote_addr, ntohs(remote_port)); + + ret = lwip_send(s, data, size, flags); + + /* reset the remote address and port number + of the connection */ + if (connected) + netconn_connect(sock->conn, &addr, port); + else + netconn_disconnect(sock->conn); + return ret; +} + +int +lwip_socket(int domain, int type, int protocol) +{ + struct netconn *conn; + int i; + + /* create a netconn */ + switch (type) { + case SOCK_RAW: + conn = netconn_new_with_proto_and_callback(NETCONN_RAW, protocol, event_callback); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%s, SOCK_RAW, %d) = ", domain == PF_INET ? "PF_INET" : "UNKNOWN", protocol)); + break; + case SOCK_DGRAM: + conn = netconn_new_with_callback(NETCONN_UDP, event_callback); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%s, SOCK_DGRAM, %d) = ", domain == PF_INET ? "PF_INET" : "UNKNOWN", protocol)); + break; + case SOCK_STREAM: + conn = netconn_new_with_callback(NETCONN_TCP, event_callback); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%s, SOCK_STREAM, %d) = ", domain == PF_INET ? "PF_INET" : "UNKNOWN", protocol)); + break; + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%d, %d/UNKNOWN, %d) = -1\n", domain, type, protocol)); + set_errno(EINVAL); + return -1; + } + + if (!conn) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("-1 / ENOBUFS (could not create netconn)\n")); + set_errno(ENOBUFS); + return -1; + } + + i = alloc_socket(conn); + + if (i == -1) { + netconn_delete(conn); + set_errno(ENOBUFS); + return -1; + } + conn->socket = i; + LWIP_DEBUGF(SOCKETS_DEBUG, ("%d\n", i)); + set_errno(0); + return i; +} + +int +lwip_write(int s, void *data, int size) +{ + return lwip_send(s, data, size, 0); +} + + +static int +lwip_selscan(int maxfdp1, fd_set *readset, fd_set *writeset, fd_set *exceptset) +{ + int i, nready = 0; + fd_set lreadset, lwriteset, lexceptset; + struct lwip_socket *p_sock; + + FD_ZERO(&lreadset); + FD_ZERO(&lwriteset); + FD_ZERO(&lexceptset); + + /* Go through each socket in each list to count number of sockets which + currently match */ + for(i = 0; i < maxfdp1; i++) + { + if (FD_ISSET(i, readset)) + { + /* See if netconn of this socket is ready for read */ + p_sock = get_socket(i); + if (p_sock && (p_sock->lastdata || p_sock->rcvevent)) + { + FD_SET(i, &lreadset); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_selscan: fd=%d ready for reading\n", i)); + nready++; + } + } + if (FD_ISSET(i, writeset)) + { + /* See if netconn of this socket is ready for write */ + p_sock = get_socket(i); + if (p_sock && p_sock->sendevent) + { + FD_SET(i, &lwriteset); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_selscan: fd=%d ready for writing\n", i)); + nready++; + } + } + } + *readset = lreadset; + *writeset = lwriteset; + FD_ZERO(exceptset); + + return nready; +} + + + +int +lwip_select(int maxfdp1, fd_set *readset, fd_set *writeset, fd_set *exceptset, + struct timeval *timeout) +{ + int i; + int nready; + fd_set lreadset, lwriteset, lexceptset; + u32_t msectimeout; + struct lwip_select_cb select_cb; + struct lwip_select_cb *p_selcb; + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select(%d, %p, %p, %p, tvsec=%ld tvusec=%ld)\n", maxfdp1, (void *)readset, (void *) writeset, (void *) exceptset, timeout ? timeout->tv_sec : -1L, timeout ? timeout->tv_usec : -1L)); + + select_cb.next = 0; + select_cb.readset = readset; + select_cb.writeset = writeset; + select_cb.exceptset = exceptset; + select_cb.sem_signalled = 0; + + /* Protect ourselves searching through the list */ + if (!selectsem) + selectsem = sys_sem_new(1); + sys_sem_wait(selectsem); + + if (readset) + lreadset = *readset; + else + FD_ZERO(&lreadset); + if (writeset) + lwriteset = *writeset; + else + FD_ZERO(&lwriteset); + if (exceptset) + lexceptset = *exceptset; + else + FD_ZERO(&lexceptset); + + /* Go through each socket in each list to count number of sockets which + currently match */ + nready = lwip_selscan(maxfdp1, &lreadset, &lwriteset, &lexceptset); + + /* If we don't have any current events, then suspend if we are supposed to */ + if (!nready) + { + if (timeout && timeout->tv_sec == 0 && timeout->tv_usec == 0) + { + sys_sem_signal(selectsem); + if (readset) + FD_ZERO(readset); + if (writeset) + FD_ZERO(writeset); + if (exceptset) + FD_ZERO(exceptset); + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select: no timeout, returning 0\n")); + set_errno(0); + + return 0; + } + + /* add our semaphore to list */ + /* We don't actually need any dynamic memory. Our entry on the + * list is only valid while we are in this function, so it's ok + * to use local variables */ + + select_cb.sem = sys_sem_new(0); + /* Note that we are still protected */ + /* Put this select_cb on top of list */ + select_cb.next = select_cb_list; + select_cb_list = &select_cb; + + /* Now we can safely unprotect */ + sys_sem_signal(selectsem); + + /* Now just wait to be woken */ + if (timeout == 0) + /* Wait forever */ + msectimeout = 0; + else + msectimeout = ((timeout->tv_sec * 1000) + ((timeout->tv_usec + 500)/1000)); + + i = sys_sem_wait_timeout(select_cb.sem, msectimeout); + + /* Take us off the list */ + sys_sem_wait(selectsem); + if (select_cb_list == &select_cb) + select_cb_list = select_cb.next; + else + for (p_selcb = select_cb_list; p_selcb; p_selcb = p_selcb->next) + if (p_selcb->next == &select_cb) + { + p_selcb->next = select_cb.next; + break; + } + + sys_sem_signal(selectsem); + + sys_sem_free(select_cb.sem); + if (i == 0) /* Timeout */ + { + if (readset) + FD_ZERO(readset); + if (writeset) + FD_ZERO(writeset); + if (exceptset) + FD_ZERO(exceptset); + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select: timeout expired\n")); + set_errno(0); + + return 0; + } + + if (readset) + lreadset = *readset; + else + FD_ZERO(&lreadset); + if (writeset) + lwriteset = *writeset; + else + FD_ZERO(&lwriteset); + if (exceptset) + lexceptset = *exceptset; + else + FD_ZERO(&lexceptset); + + /* See what's set */ + nready = lwip_selscan(maxfdp1, &lreadset, &lwriteset, &lexceptset); + } + else + sys_sem_signal(selectsem); + + if (readset) + *readset = lreadset; + if (writeset) + *writeset = lwriteset; + if (exceptset) + *exceptset = lexceptset; + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select: nready=%d\n", nready)); + set_errno(0); + + return nready; +} + + +static void +event_callback(struct netconn *conn, enum netconn_evt evt, u16_t len) +{ + int s; + struct lwip_socket *sock; + struct lwip_select_cb *scb; + + /* Get socket */ + if (conn) + { + s = conn->socket; + if (s < 0) + { + /* Data comes in right away after an accept, even though + * the server task might not have created a new socket yet. + * Just count down (or up) if that's the case and we + * will use the data later. Note that only receive events + * can happen before the new socket is set up. */ + if (evt == NETCONN_EVT_RCVPLUS) + conn->socket--; + return; + } + + sock = get_socket(s); + if (!sock) + return; + } + else + return; + + if (!selectsem) + selectsem = sys_sem_new(1); + + sys_sem_wait(selectsem); + /* Set event as required */ + switch (evt) + { + case NETCONN_EVT_RCVPLUS: + sock->rcvevent++; + break; + case NETCONN_EVT_RCVMINUS: + sock->rcvevent--; + break; + case NETCONN_EVT_SENDPLUS: + sock->sendevent = 1; + break; + case NETCONN_EVT_SENDMINUS: + sock->sendevent = 0; + break; + } + sys_sem_signal(selectsem); + + /* Now decide if anyone is waiting for this socket */ + /* NOTE: This code is written this way to protect the select link list + but to avoid a deadlock situation by releasing socksem before + signalling for the select. This means we need to go through the list + multiple times ONLY IF a select was actually waiting. We go through + the list the number of waiting select calls + 1. This list is + expected to be small. */ + while (1) + { + sys_sem_wait(selectsem); + for (scb = select_cb_list; scb; scb = scb->next) + { + if (scb->sem_signalled == 0) + { + /* Test this select call for our socket */ + if (scb->readset && FD_ISSET(s, scb->readset)) + if (sock->rcvevent) + break; + if (scb->writeset && FD_ISSET(s, scb->writeset)) + if (sock->sendevent) + break; + } + } + if (scb) + { + scb->sem_signalled = 1; + sys_sem_signal(selectsem); + sys_sem_signal(scb->sem); + } else { + sys_sem_signal(selectsem); + break; + } + } + +} + + + + +int lwip_shutdown(int s, int how) +{ + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_shutdown(%d, how=%d)\n", s, how)); + return lwip_close(s); /* XXX temporary hack until proper implementation */ +} + +int lwip_getpeername (int s, struct sockaddr *name, socklen_t *namelen) +{ + struct lwip_socket *sock; + struct sockaddr_in sin; + struct ip_addr naddr; + + sock = get_socket(s); + if (!sock) { + set_errno(EBADF); + return -1; + } + + memset(&sin, 0, sizeof(sin)); + sin.sin_len = sizeof(sin); + sin.sin_family = AF_INET; + + /* get the IP address and port of the remote host */ + netconn_peer(sock->conn, &naddr, &sin.sin_port); + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getpeername(%d, addr=", s)); + ip_addr_debug_print(SOCKETS_DEBUG, &naddr); + LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%d)\n", sin.sin_port)); + + sin.sin_port = htons(sin.sin_port); + sin.sin_addr.s_addr = naddr.addr; + + if (*namelen > sizeof(sin)) + *namelen = sizeof(sin); + + memcpy(name, &sin, *namelen); + sock_set_errno(sock, 0); + return 0; +} + +int lwip_getsockname (int s, struct sockaddr *name, socklen_t *namelen) +{ + struct lwip_socket *sock; + struct sockaddr_in sin; + struct ip_addr *naddr; + + sock = get_socket(s); + if (!sock) { + set_errno(EBADF); + return -1; + } + + memset(&sin, 0, sizeof(sin)); + sin.sin_len = sizeof(sin); + sin.sin_family = AF_INET; + + /* get the IP address and port of the remote host */ + netconn_addr(sock->conn, &naddr, &sin.sin_port); + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockname(%d, addr=", s)); + ip_addr_debug_print(SOCKETS_DEBUG, naddr); + LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%d)\n", sin.sin_port)); + + sin.sin_port = htons(sin.sin_port); + sin.sin_addr.s_addr = naddr->addr; + + if (*namelen > sizeof(sin)) + *namelen = sizeof(sin); + + memcpy(name, &sin, *namelen); + sock_set_errno(sock, 0); + return 0; +} + +int lwip_getsockopt (int s, int level, int optname, void *optval, socklen_t *optlen) +{ + int err = 0; + struct lwip_socket *sock = get_socket(s); + + if(!sock) { + set_errno(EBADF); + return -1; + } + + if( NULL == optval || NULL == optlen ) { + sock_set_errno( sock, EFAULT ); + return -1; + } + + /* Do length and type checks for the various options first, to keep it readable. */ + switch( level ) { + +/* Level: SOL_SOCKET */ + case SOL_SOCKET: + switch(optname) { + + case SO_ACCEPTCONN: + case SO_BROADCAST: + /* UNIMPL case SO_DEBUG: */ + /* UNIMPL case SO_DONTROUTE: */ + case SO_ERROR: + case SO_KEEPALIVE: + /* UNIMPL case SO_OOBINLINE: */ + /* UNIMPL case SO_RCVBUF: */ + /* UNIMPL case SO_SNDBUF: */ + /* UNIMPL case SO_RCVLOWAT: */ + /* UNIMPL case SO_SNDLOWAT: */ +#if SO_REUSE + case SO_REUSEADDR: + case SO_REUSEPORT: +#endif /* SO_REUSE */ + case SO_TYPE: + /* UNIMPL case SO_USELOOPBACK: */ + if( *optlen < sizeof(int) ) { + err = EINVAL; + } + break; + + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, UNIMPL: optname=0x%x, ..)\n", s, optname)); + err = ENOPROTOOPT; + } /* switch */ + break; + +/* Level: IPPROTO_IP */ + case IPPROTO_IP: + switch(optname) { + /* UNIMPL case IP_HDRINCL: */ + /* UNIMPL case IP_RCVDSTADDR: */ + /* UNIMPL case IP_RCVIF: */ + case IP_TTL: + case IP_TOS: + if( *optlen < sizeof(int) ) { + err = EINVAL; + } + break; + + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, UNIMPL: optname=0x%x, ..)\n", s, optname)); + err = ENOPROTOOPT; + } /* switch */ + break; + +/* Level: IPPROTO_TCP */ + case IPPROTO_TCP: + if( *optlen < sizeof(int) ) { + err = EINVAL; + break; + } + + /* If this is no TCP socket, ignore any options. */ + if ( sock->conn->type != NETCONN_TCP ) return 0; + + switch( optname ) { + case TCP_NODELAY: + case TCP_KEEPALIVE: + break; + + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_TCP, UNIMPL: optname=0x%x, ..)\n", s, optname)); + err = ENOPROTOOPT; + } /* switch */ + break; + +/* UNDEFINED LEVEL */ + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, level=0x%x, UNIMPL: optname=0x%x, ..)\n", s, level, optname)); + err = ENOPROTOOPT; + } /* switch */ + + + if( 0 != err ) { + sock_set_errno(sock, err); + return -1; + } + + + + /* Now do the actual option processing */ + + switch(level) { + +/* Level: SOL_SOCKET */ + case SOL_SOCKET: + switch( optname ) { + + /* The option flags */ + case SO_ACCEPTCONN: + case SO_BROADCAST: + /* UNIMPL case SO_DEBUG: */ + /* UNIMPL case SO_DONTROUTE: */ + case SO_KEEPALIVE: + /* UNIMPL case SO_OOBINCLUDE: */ +#if SO_REUSE + case SO_REUSEADDR: + case SO_REUSEPORT: +#endif /* SO_REUSE */ + /*case SO_USELOOPBACK: UNIMPL */ + *(int*)optval = sock->conn->pcb.tcp->so_options & optname; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, optname=0x%x, ..) = %s\n", s, optname, (*(int*)optval?"on":"off"))); + break; + + case SO_TYPE: + switch (sock->conn->type) { + case NETCONN_RAW: + *(int*)optval = SOCK_RAW; + break; + case NETCONN_TCP: + *(int*)optval = SOCK_STREAM; + break; + case NETCONN_UDP: + case NETCONN_UDPLITE: + case NETCONN_UDPNOCHKSUM: + *(int*)optval = SOCK_DGRAM; + break; + default: /* unrecognized socket type */ + *(int*)optval = sock->conn->type; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, SO_TYPE): unrecognized socket type %d\n", s, *(int *)optval)); + } /* switch */ + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, SO_TYPE) = %d\n", s, *(int *)optval)); + break; + + case SO_ERROR: + *(int *)optval = sock->err; + sock->err = 0; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, SO_ERROR) = %d\n", s, *(int *)optval)); + break; + } /* switch */ + break; + +/* Level: IPPROTO_IP */ + case IPPROTO_IP: + switch( optname ) { + case IP_TTL: + *(int*)optval = sock->conn->pcb.tcp->ttl; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_TTL) = %d\n", s, *(int *)optval)); + break; + case IP_TOS: + *(int*)optval = sock->conn->pcb.tcp->tos; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_TOS) = %d\n", s, *(int *)optval)); + break; + } /* switch */ + break; + +/* Level: IPPROTO_TCP */ + case IPPROTO_TCP: + switch( optname ) { + case TCP_NODELAY: + *(int*)optval = (sock->conn->pcb.tcp->flags & TF_NODELAY); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_TCP, TCP_NODELAY) = %s\n", s, (*(int*)optval)?"on":"off") ); + break; + case TCP_KEEPALIVE: + *(int*)optval = sock->conn->pcb.tcp->keepalive; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, TCP_KEEPALIVE) = %d\n", s, *(int *)optval)); + break; + } /* switch */ + break; + } + + + sock_set_errno(sock, err); + return err ? -1 : 0; +} + +int lwip_setsockopt (int s, int level, int optname, const void *optval, socklen_t optlen) +{ + struct lwip_socket *sock = get_socket(s); + int err = 0; + + if(!sock) { + set_errno(EBADF); + return -1; + } + + if( NULL == optval ) { + sock_set_errno( sock, EFAULT ); + return -1; + } + + + /* Do length and type checks for the various options first, to keep it readable. */ + switch( level ) { + +/* Level: SOL_SOCKET */ + case SOL_SOCKET: + switch(optname) { + + case SO_BROADCAST: + /* UNIMPL case SO_DEBUG: */ + /* UNIMPL case SO_DONTROUTE: */ + case SO_KEEPALIVE: + /* UNIMPL case SO_OOBINLINE: */ + /* UNIMPL case SO_RCVBUF: */ + /* UNIMPL case SO_SNDBUF: */ + /* UNIMPL case SO_RCVLOWAT: */ + /* UNIMPL case SO_SNDLOWAT: */ +#if SO_REUSE + case SO_REUSEADDR: + case SO_REUSEPORT: +#endif /* SO_REUSE */ + /* UNIMPL case SO_USELOOPBACK: */ + if( optlen < sizeof(int) ) { + err = EINVAL; + } + break; + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, SOL_SOCKET, UNIMPL: optname=0x%x, ..)\n", s, optname)); + err = ENOPROTOOPT; + } /* switch */ + break; + +/* Level: IPPROTO_IP */ + case IPPROTO_IP: + switch(optname) { + /* UNIMPL case IP_HDRINCL: */ + /* UNIMPL case IP_RCVDSTADDR: */ + /* UNIMPL case IP_RCVIF: */ + case IP_TTL: + case IP_TOS: + if( optlen < sizeof(int) ) { + err = EINVAL; + } + break; + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IP, UNIMPL: optname=0x%x, ..)\n", s, optname)); + err = ENOPROTOOPT; + } /* switch */ + break; + +/* Level: IPPROTO_TCP */ + case IPPROTO_TCP: + if( optlen < sizeof(int) ) { + err = EINVAL; + break; + } + + /* If this is no TCP socket, ignore any options. */ + if ( sock->conn->type != NETCONN_TCP ) return 0; + + switch( optname ) { + case TCP_NODELAY: + case TCP_KEEPALIVE: + break; + + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, UNIMPL: optname=0x%x, ..)\n", s, optname)); + err = ENOPROTOOPT; + } /* switch */ + break; + +/* UNDEFINED LEVEL */ + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, level=0x%x, UNIMPL: optname=0x%x, ..)\n", s, level, optname)); + err = ENOPROTOOPT; + } /* switch */ + + + if( 0 != err ) { + sock_set_errno(sock, err); + return -1; + } + + + + /* Now do the actual option processing */ + + switch(level) { + +/* Level: SOL_SOCKET */ + case SOL_SOCKET: + switch(optname) { + + /* The option flags */ + case SO_BROADCAST: + /* UNIMPL case SO_DEBUG: */ + /* UNIMPL case SO_DONTROUTE: */ + case SO_KEEPALIVE: + /* UNIMPL case SO_OOBINCLUDE: */ +#if SO_REUSE + case SO_REUSEADDR: + case SO_REUSEPORT: +#endif /* SO_REUSE */ + /* UNIMPL case SO_USELOOPBACK: */ + if ( *(int*)optval ) { + sock->conn->pcb.tcp->so_options |= optname; + } else { + sock->conn->pcb.tcp->so_options &= ~optname; + } + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, SOL_SOCKET, optname=0x%x, ..) -> %s\n", s, optname, (*(int*)optval?"on":"off"))); + break; + } /* switch */ + break; + +/* Level: IPPROTO_IP */ + case IPPROTO_IP: + switch( optname ) { + case IP_TTL: + sock->conn->pcb.tcp->ttl = (u8_t)(*(int*)optval); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IP, IP_TTL, ..) -> %u\n", s, sock->conn->pcb.tcp->ttl)); + break; + case IP_TOS: + sock->conn->pcb.tcp->tos = (u8_t)(*(int*)optval); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IP, IP_TOS, ..)-> %u\n", s, sock->conn->pcb.tcp->tos)); + break; + } /* switch */ + break; + +/* Level: IPPROTO_TCP */ + case IPPROTO_TCP: + switch( optname ) { + case TCP_NODELAY: + if ( *(int*)optval ) { + sock->conn->pcb.tcp->flags |= TF_NODELAY; + } else { + sock->conn->pcb.tcp->flags &= ~TF_NODELAY; + } + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_NODELAY) -> %s\n", s, (*(int *)optval)?"on":"off") ); + break; + case TCP_KEEPALIVE: + sock->conn->pcb.tcp->keepalive = (u32_t)(*(int*)optval); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPALIVE) -> %u\n", s, sock->conn->pcb.tcp->keepalive)); + break; + } /* switch */ + break; + } /* switch */ + + sock_set_errno(sock, err); + return err ? -1 : 0; +} + +int lwip_ioctl(int s, long cmd, void *argp) +{ + struct lwip_socket *sock = get_socket(s); + + if(!sock) { + set_errno(EBADF); + return -1; + } + + switch (cmd) { + case FIONREAD: + if (!argp) { + sock_set_errno(sock, EINVAL); + return -1; + } + + *((u16_t*)argp) = sock->conn->recv_avail; + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_ioctl(%d, FIONREAD, %p) = %u\n", s, argp, *((u16_t*)argp))); + sock_set_errno(sock, 0); + return 0; + + case FIONBIO: + if (argp && *(u32_t*)argp) + sock->flags |= O_NONBLOCK; + else + sock->flags &= ~O_NONBLOCK; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_ioctl(%d, FIONBIO, %d)\n", s, !!(sock->flags & O_NONBLOCK))); + sock_set_errno(sock, 0); + return 0; + + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_ioctl(%d, UNIMPL: 0x%lx, %p)\n", s, cmd, argp)); + sock_set_errno(sock, ENOSYS); /* not yet implemented */ + return -1; + } +} +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/api/tcpip.c @@ -0,0 +1,177 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + +#include "lwip/opt.h" + +#include "lwip/sys.h" + +#include "lwip/memp.h" +#include "lwip/pbuf.h" + +#include "lwip/ip.h" +#include "lwip/udp.h" +#include "lwip/tcp.h" + +#include "lwip/tcpip.h" + +static void (* tcpip_init_done)(void *arg) = NULL; +static void *tcpip_init_done_arg; +static sys_mbox_t mbox; +#if LWIP_TCP +static int tcpip_tcp_timer_active = 0; + + + +static void +tcpip_tcp_timer(void *arg) +{ + (void)arg; + + tcp_tmr(); + if (tcp_active_pcbs || tcp_tw_pcbs) { + sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL); + } else { + tcpip_tcp_timer_active = 0; + } +} + +void +tcp_timer_needed(void) +{ + if (!tcpip_tcp_timer_active && (tcp_active_pcbs || tcp_tw_pcbs)) { + tcpip_tcp_timer_active = 1; + sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL); + } +} +#endif /* LWIP_TCP */ + +static void +tcpip_thread(void *arg) +{ + struct tcpip_msg *msg; + + (void)arg; + + ip_init(); +#if LWIP_UDP + udp_init(); +#endif +#if LWIP_TCP + tcp_init(); +#endif + if (tcpip_init_done != NULL) { + tcpip_init_done(tcpip_init_done_arg); + } + + while (1) { /* MAIN Loop */ + sys_mbox_fetch(mbox, (void *)&msg); + switch (msg->type) { + case TCPIP_MSG_API: + LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: API message %p\n", (void *)msg)); + api_msg_input(msg->msg.apimsg); + break; + case TCPIP_MSG_INPUT: + LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: IP packet %p\n", (void *)msg)); + ip_input(msg->msg.inp.p, msg->msg.inp.netif); + break; + case TCPIP_MSG_CALLBACK: + LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: CALLBACK %p\n", (void *)msg)); + msg->msg.cb.f(msg->msg.cb.ctx); + break; + default: + break; + } + memp_free(MEMP_TCPIP_MSG, msg); + } +} + +err_t +tcpip_input(struct pbuf *p, struct netif *inp) +{ + struct tcpip_msg *msg; + + msg = memp_malloc(MEMP_TCPIP_MSG); + if (msg == NULL) { + pbuf_free(p); + return ERR_MEM; + } + + msg->type = TCPIP_MSG_INPUT; + msg->msg.inp.p = p; + msg->msg.inp.netif = inp; + sys_mbox_post(mbox, msg); + return ERR_OK; +} + +err_t +tcpip_callback(void (*f)(void *ctx), void *ctx) +{ + struct tcpip_msg *msg; + + msg = memp_malloc(MEMP_TCPIP_MSG); + if (msg == NULL) { + return ERR_MEM; + } + + msg->type = TCPIP_MSG_CALLBACK; + msg->msg.cb.f = f; + msg->msg.cb.ctx = ctx; + sys_mbox_post(mbox, msg); + return ERR_OK; +} + +void +tcpip_apimsg(struct api_msg *apimsg) +{ + struct tcpip_msg *msg; + msg = memp_malloc(MEMP_TCPIP_MSG); + if (msg == NULL) { + memp_free(MEMP_API_MSG, apimsg); + return; + } + msg->type = TCPIP_MSG_API; + msg->msg.apimsg = apimsg; + sys_mbox_post(mbox, msg); +} + +void +tcpip_init(void (* initfunc)(void *), void *arg) +{ + tcpip_init_done = initfunc; + tcpip_init_done_arg = arg; + mbox = sys_mbox_new(); + sys_thread_new(tcpip_thread, NULL, TCPIP_THREAD_PRIO); +} + + + +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/core/dhcp.c @@ -0,0 +1,1418 @@ +/** + * @file + * + * Dynamic Host Configuration Protocol client + */ + +/* + * + * Copyright (c) 2001-2004 Leon Woestenberg <leon.woestenberg@gmx.net> + * Copyright (c) 2001-2004 Axon Digital Design B.V., The Netherlands. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is a contribution to the lwIP TCP/IP stack. + * The Swedish Institute of Computer Science and Adam Dunkels + * are specifically granted permission to redistribute this + * source code. + * + * Author: Leon Woestenberg <leon.woestenberg@gmx.net> + * + * This is a DHCP client for the lwIP TCP/IP stack. It aims to conform + * with RFC 2131 and RFC 2132. + * + * TODO: + * - Proper parsing of DHCP messages exploiting file/sname field overloading. + * - Add JavaDoc style documentation (API, internals). + * - Support for interfaces other than Ethernet (SLIP, PPP, ...) + * + * Please coordinate changes and requests with Leon Woestenberg + * <leon.woestenberg@gmx.net> + * + * Integration with your code: + * + * In lwip/dhcp.h + * #define DHCP_COARSE_TIMER_SECS (recommended 60 which is a minute) + * #define DHCP_FINE_TIMER_MSECS (recommended 500 which equals TCP coarse timer) + * + * Then have your application call dhcp_coarse_tmr() and + * dhcp_fine_tmr() on the defined intervals. + * + * dhcp_start(struct netif *netif); + * starts a DHCP client instance which configures the interface by + * obtaining an IP address lease and maintaining it. + * + * Use dhcp_release(netif) to end the lease and use dhcp_stop(netif) + * to remove the DHCP client. + * + */ +#include "lwip/stats.h" +#include "lwip/mem.h" +#include "lwip/udp.h" +#include "lwip/ip_addr.h" +#include "lwip/netif.h" +#include "lwip/inet.h" +#include "netif/etharp.h" + +#include "lwip/sys.h" +#include "lwip/opt.h" +#include "lwip/dhcp.h" + +#if LWIP_DHCP /* don't build if not configured for use in lwipopt.h */ + +/** global transaction identifier, must be + * unique for each DHCP request. */ +static u32_t xid = 0xABCD0000; + +/** DHCP client state machine functions */ +static void dhcp_handle_ack(struct netif *netif); +static void dhcp_handle_nak(struct netif *netif); +static void dhcp_handle_offer(struct netif *netif); + +static err_t dhcp_discover(struct netif *netif); +static err_t dhcp_select(struct netif *netif); +static void dhcp_check(struct netif *netif); +static void dhcp_bind(struct netif *netif); +static err_t dhcp_decline(struct netif *netif); +static err_t dhcp_rebind(struct netif *netif); +static err_t dhcp_release(struct netif *netif); +static void dhcp_set_state(struct dhcp *dhcp, unsigned char new_state); + +/** receive, unfold, parse and free incoming messages */ +static void dhcp_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, struct ip_addr *addr, u16_t port); +static err_t dhcp_unfold_reply(struct dhcp *dhcp); +static u8_t *dhcp_get_option_ptr(struct dhcp *dhcp, u8_t option_type); +static u8_t dhcp_get_option_byte(u8_t *ptr); +static u16_t dhcp_get_option_short(u8_t *ptr); +static u32_t dhcp_get_option_long(u8_t *ptr); +static void dhcp_free_reply(struct dhcp *dhcp); + +/** set the DHCP timers */ +static void dhcp_timeout(struct netif *netif); +static void dhcp_t1_timeout(struct netif *netif); +static void dhcp_t2_timeout(struct netif *netif); + +/** build outgoing messages */ +/** create a DHCP request, fill in common headers */ +static err_t dhcp_create_request(struct netif *netif); +/** free a DHCP request */ +static void dhcp_delete_request(struct netif *netif); +/** add a DHCP option (type, then length in bytes) */ +static void dhcp_option(struct dhcp *dhcp, u8_t option_type, u8_t option_len); +/** add option values */ +static void dhcp_option_byte(struct dhcp *dhcp, u8_t value); +static void dhcp_option_short(struct dhcp *dhcp, u16_t value); +static void dhcp_option_long(struct dhcp *dhcp, u32_t value); +/** always add the DHCP options trailer to end and pad */ +static void dhcp_option_trailer(struct dhcp *dhcp); + +/** + * Back-off the DHCP client (because of a received NAK response). + * + * Back-off the DHCP client because of a received NAK. Receiving a + * NAK means the client asked for something non-sensible, for + * example when it tries to renew a lease obtained on another network. + * + * We back-off and will end up restarting a fresh DHCP negotiation later. + * + * @param state pointer to DHCP state structure + */ +static void dhcp_handle_nak(struct netif *netif) { + struct dhcp *dhcp = netif->dhcp; + u16_t msecs = 10 * 1000; + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 3, ("dhcp_handle_nak(netif=%p) %c%c%u\n", netif, + netif->name[0], netif->name[1], (unsigned int)netif->num)); + dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS; + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_handle_nak(): set request timeout %u msecs\n", msecs)); + dhcp_set_state(dhcp, DHCP_BACKING_OFF); +} + +/** + * Checks if the offered IP address is already in use. + * + * It does so by sending an ARP request for the offered address and + * entering CHECKING state. If no ARP reply is received within a small + * interval, the address is assumed to be free for use by us. + */ +static void dhcp_check(struct netif *netif) +{ + struct dhcp *dhcp = netif->dhcp; + err_t result; + u16_t msecs; + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 3, ("dhcp_check(netif=%p) %c%c\n", (void *)netif, (unsigned int)netif->name[0], + (unsigned int)netif->name[1])); + /* create an ARP query for the offered IP address, expecting that no host + responds, as the IP address should not be in use. */ + result = etharp_query(netif, &dhcp->offered_ip_addr, NULL); + if (result != ERR_OK) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("dhcp_check: could not perform ARP query\n")); + } + dhcp->tries++; + msecs = 500; + dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS; + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_check(): set request timeout %u msecs\n", msecs)); + dhcp_set_state(dhcp, DHCP_CHECKING); +} + +/** + * Remember the configuration offered by a DHCP server. + * + * @param state pointer to DHCP state structure + */ +static void dhcp_handle_offer(struct netif *netif) +{ + struct dhcp *dhcp = netif->dhcp; + /* obtain the server address */ + u8_t *option_ptr = dhcp_get_option_ptr(dhcp, DHCP_OPTION_SERVER_ID); + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 3, ("dhcp_handle_offer(netif=%p) %c%c%u\n", netif, + netif->name[0], netif->name[1], netif->num)); + if (option_ptr != NULL) + { + dhcp->server_ip_addr.addr = htonl(dhcp_get_option_long(&option_ptr[2])); + LWIP_DEBUGF(DHCP_DEBUG | DBG_STATE, ("dhcp_handle_offer(): server 0x%08lx\n", dhcp->server_ip_addr.addr)); + /* remember offered address */ + ip_addr_set(&dhcp->offered_ip_addr, (struct ip_addr *)&dhcp->msg_in->yiaddr); + LWIP_DEBUGF(DHCP_DEBUG | DBG_STATE, ("dhcp_handle_offer(): offer for 0x%08lx\n", dhcp->offered_ip_addr.addr)); + + dhcp_select(netif); + } +} + +/** + * Select a DHCP server offer out of all offers. + * + * Simply select the first offer received. + * + * @param netif the netif under DHCP control + * @return lwIP specific error (see error.h) + */ +static err_t dhcp_select(struct netif *netif) +{ + struct dhcp *dhcp = netif->dhcp; + err_t result; + u32_t msecs; + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 3, ("dhcp_select(netif=%p) %c%c%u\n", netif, netif->name[0], netif->name[1], netif->num)); + + /* create and initialize the DHCP message header */ + result = dhcp_create_request(netif); + if (result == ERR_OK) + { + dhcp_option(dhcp, DHCP_OPTION_MESSAGE_TYPE, DHCP_OPTION_MESSAGE_TYPE_LEN); + dhcp_option_byte(dhcp, DHCP_REQUEST); + + dhcp_option(dhcp, DHCP_OPTION_MAX_MSG_SIZE, DHCP_OPTION_MAX_MSG_SIZE_LEN); + dhcp_option_short(dhcp, 576); + + /* MUST request the offered IP address */ + dhcp_option(dhcp, DHCP_OPTION_REQUESTED_IP, 4); + dhcp_option_long(dhcp, ntohl(dhcp->offered_ip_addr.addr)); + + dhcp_option(dhcp, DHCP_OPTION_SERVER_ID, 4); + dhcp_option_long(dhcp, ntohl(dhcp->server_ip_addr.addr)); + + dhcp_option(dhcp, DHCP_OPTION_PARAMETER_REQUEST_LIST, 3); + dhcp_option_byte(dhcp, DHCP_OPTION_SUBNET_MASK); + dhcp_option_byte(dhcp, DHCP_OPTION_ROUTER); + dhcp_option_byte(dhcp, DHCP_OPTION_BROADCAST); + + dhcp_option_trailer(dhcp); + /* shrink the pbuf to the actual content length */ + pbuf_realloc(dhcp->p_out, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN + dhcp->options_out_len); + + /* TODO: we really should bind to a specific local interface here + but we cannot specify an unconfigured netif as it is addressless */ + udp_bind(dhcp->pcb, IP_ADDR_ANY, DHCP_CLIENT_PORT); + /* send broadcast to any DHCP server */ + udp_connect(dhcp->pcb, IP_ADDR_BROADCAST, DHCP_SERVER_PORT); + udp_send(dhcp->pcb, dhcp->p_out); + /* reconnect to any (or to server here?!) */ + udp_connect(dhcp->pcb, IP_ADDR_ANY, DHCP_SERVER_PORT); + dhcp_delete_request(netif); + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_select: REQUESTING\n")); + dhcp_set_state(dhcp, DHCP_REQUESTING); + } else { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("dhcp_select: could not allocate DHCP request\n")); + } + dhcp->tries++; + msecs = dhcp->tries < 4 ? dhcp->tries * 1000 : 4 * 1000; + dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS; + LWIP_DEBUGF(DHCP_DEBUG | DBG_STATE, ("dhcp_select(): set request timeout %u msecs\n", msecs)); + return result; +} + +/** + * The DHCP timer that checks for lease renewal/rebind timeouts. + * + */ +void dhcp_coarse_tmr() +{ + struct netif *netif = netif_list; + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_coarse_tmr()\n")); + /* iterate through all network interfaces */ + while (netif != NULL) { + /* only act on DHCP configured interfaces */ + if (netif->dhcp != NULL) { + /* timer is active (non zero), and triggers (zeroes) now? */ + if (netif->dhcp->t2_timeout-- == 1) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_coarse_tmr(): t2 timeout\n")); + /* this clients' rebind timeout triggered */ + dhcp_t2_timeout(netif); + /* timer is active (non zero), and triggers (zeroes) now */ + } else if (netif->dhcp->t1_timeout-- == 1) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_coarse_tmr(): t1 timeout\n")); + /* this clients' renewal timeout triggered */ + dhcp_t1_timeout(netif); + } + } + /* proceed to next netif */ + netif = netif->next; + } +} + +/** + * DHCP transaction timeout handling + * + * A DHCP server is expected to respond within a + * short period of time. + */ +void dhcp_fine_tmr() +{ + struct netif *netif = netif_list; + /* loop through clients */ + while (netif != NULL) { + /* only act on DHCP configured interfaces */ + if (netif->dhcp != NULL) { + /* timer is active (non zero), and triggers (zeroes) now */ + if (netif->dhcp->request_timeout-- == 1) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_fine_tmr(): request timeout\n")); + /* this clients' request timeout triggered */ + dhcp_timeout(netif); + } + } + /* proceed to next network interface */ + netif = netif->next; + } +} + +/** + * A DHCP negotiation transaction, or ARP request, has timed out. + * + * The timer that was started with the DHCP or ARP request has + * timed out, indicating no response was received in time. + * + * @param netif the netif under DHCP control + * + */ +static void dhcp_timeout(struct netif *netif) +{ + struct dhcp *dhcp = netif->dhcp; + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 3, ("dhcp_timeout()\n")); + /* back-off period has passed, or server selection timed out */ + if ((dhcp->state == DHCP_BACKING_OFF) || (dhcp->state == DHCP_SELECTING)) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_timeout(): restarting discovery\n")); + dhcp_discover(netif); + /* receiving the requested lease timed out */ + } else if (dhcp->state == DHCP_REQUESTING) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_timeout(): REQUESTING, DHCP request timed out\n")); + if (dhcp->tries <= 5) { + dhcp_select(netif); + } else { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_timeout(): REQUESTING, releasing, restarting\n")); + dhcp_release(netif); + dhcp_discover(netif); + } + /* received no ARP reply for the offered address (which is good) */ + } else if (dhcp->state == DHCP_CHECKING) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_timeout(): CHECKING, ARP request timed out\n")); + if (dhcp->tries <= 1) { + dhcp_check(netif); + /* no ARP replies on the offered address, + looks like the IP address is indeed free */ + } else { + /* bind the interface to the offered address */ + dhcp_bind(netif); + } + } + /* did not get response to renew request? */ + else if (dhcp->state == DHCP_RENEWING) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_timeout(): RENEWING, DHCP request timed out\n")); + /* just retry renewal */ + /* note that the rebind timer will eventually time-out if renew does not work */ + dhcp_renew(netif); + /* did not get response to rebind request? */ + } else if (dhcp->state == DHCP_REBINDING) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_timeout(): REBINDING, DHCP request timed out\n")); + if (dhcp->tries <= 8) { + dhcp_rebind(netif); + } else { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_timeout(): RELEASING, DISCOVERING\n")); + dhcp_release(netif); + dhcp_discover(netif); + } + } +} + +/** + * The renewal period has timed out. + * + * @param netif the netif under DHCP control + */ +static void dhcp_t1_timeout(struct netif *netif) +{ + struct dhcp *dhcp = netif->dhcp; + LWIP_DEBUGF(DHCP_DEBUG | DBG_STATE, ("dhcp_t1_timeout()\n")); + if ((dhcp->state == DHCP_REQUESTING) || (dhcp->state == DHCP_BOUND) || (dhcp->state == DHCP_RENEWING)) { + /* just retry to renew */ + /* note that the rebind timer will eventually time-out if renew does not work */ + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_t1_timeout(): must renew\n")); + dhcp_renew(netif); + } +} + +/** + * The rebind period has timed out. + * + */ +static void dhcp_t2_timeout(struct netif *netif) +{ + struct dhcp *dhcp = netif->dhcp; + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_t2_timeout()\n")); + if ((dhcp->state == DHCP_REQUESTING) || (dhcp->state == DHCP_BOUND) || (dhcp->state == DHCP_RENEWING)) { + /* just retry to rebind */ + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_t2_timeout(): must rebind\n")); + dhcp_rebind(netif); + } +} + +/** + * + * @param netif the netif under DHCP control + */ +static void dhcp_handle_ack(struct netif *netif) +{ + struct dhcp *dhcp = netif->dhcp; + u8_t *option_ptr; + /* clear options we might not get from the ACK */ + dhcp->offered_sn_mask.addr = 0; + dhcp->offered_gw_addr.addr = 0; + dhcp->offered_bc_addr.addr = 0; + + /* lease time given? */ + option_ptr = dhcp_get_option_ptr(dhcp, DHCP_OPTION_LEASE_TIME); + if (option_ptr != NULL) { + /* remember offered lease time */ + dhcp->offered_t0_lease = dhcp_get_option_long(option_ptr + 2); + } + /* renewal period given? */ + option_ptr = dhcp_get_option_ptr(dhcp, DHCP_OPTION_T1); + if (option_ptr != NULL) { + /* remember given renewal period */ + dhcp->offered_t1_renew = dhcp_get_option_long(option_ptr + 2); + } else { + /* calculate safe periods for renewal */ + dhcp->offered_t1_renew = dhcp->offered_t0_lease / 2; + } + + /* renewal period given? */ + option_ptr = dhcp_get_option_ptr(dhcp, DHCP_OPTION_T2); + if (option_ptr != NULL) { + /* remember given rebind period */ + dhcp->offered_t2_rebind = dhcp_get_option_long(option_ptr + 2); + } else { + /* calculate safe periods for rebinding */ + dhcp->offered_t2_rebind = dhcp->offered_t0_lease; + } + + /* (y)our internet address */ + ip_addr_set(&dhcp->offered_ip_addr, &dhcp->msg_in->yiaddr); + +/** + * Patch #1308 + * TODO: we must check if the file field is not overloaded by DHCP options! + */ +#if 0 + /* boot server address */ + ip_addr_set(&dhcp->offered_si_addr, &dhcp->msg_in->siaddr); + /* boot file name */ + if (dhcp->msg_in->file[0]) { + dhcp->boot_file_name = mem_malloc(strlen(dhcp->msg_in->file) + 1); + strcpy(dhcp->boot_file_name, dhcp->msg_in->file); + } +#endif + + /* subnet mask */ + option_ptr = dhcp_get_option_ptr(dhcp, DHCP_OPTION_SUBNET_MASK); + /* subnet mask given? */ + if (option_ptr != NULL) { + dhcp->offered_sn_mask.addr = htonl(dhcp_get_option_long(&option_ptr[2])); + } + + /* gateway router */ + option_ptr = dhcp_get_option_ptr(dhcp, DHCP_OPTION_ROUTER); + if (option_ptr != NULL) { + dhcp->offered_gw_addr.addr = htonl(dhcp_get_option_long(&option_ptr[2])); + } + + /* broadcast address */ + option_ptr = dhcp_get_option_ptr(dhcp, DHCP_OPTION_BROADCAST); + if (option_ptr != NULL) { + dhcp->offered_bc_addr.addr = htonl(dhcp_get_option_long(&option_ptr[2])); + } +} + +/** + * Start DHCP negotiation for a network interface. + * + * If no DHCP client instance was attached to this interface, + * a new client is created first. If a DHCP client instance + * was already present, it restarts negotiation. + * + * @param netif The lwIP network interface + * @return lwIP error code + * - ERR_OK - No error + * - ERR_MEM - Out of memory + * + */ +err_t dhcp_start(struct netif *netif) +{ + struct dhcp *dhcp = netif->dhcp; + err_t result = ERR_OK; + + LWIP_ASSERT("netif != NULL", netif != NULL); + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_start(netif=%p) %c%c%u\n", netif, netif->name[0], netif->name[1], netif->num)); + + if (dhcp == NULL) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_start(): starting new DHCP client\n")); + dhcp = mem_malloc(sizeof(struct dhcp)); + if (dhcp == NULL) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_start(): could not allocate dhcp\n")); + netif->flags &= ~NETIF_FLAG_DHCP; + return ERR_MEM; + } + /* clear data structure */ + memset(dhcp, 0, sizeof(struct dhcp)); + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_start(): allocated dhcp")); + dhcp->pcb = udp_new(); + if (dhcp->pcb == NULL) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_start(): could not obtain pcb\n")); + mem_free((void *)dhcp); + dhcp = NULL; + netif->flags &= ~NETIF_FLAG_DHCP; + return ERR_MEM; + } + /* store this dhcp client in the netif */ + netif->dhcp = dhcp; + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_start(): created new udp pcb\n")); + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_start(): starting DHCP configuration\n")); + } else { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE | 3, ("dhcp_start(): restarting DHCP configuration\n")); + } + /* (re)start the DHCP negotiation */ + result = dhcp_discover(netif); + if (result != ERR_OK) { + /* free resources allocated above */ + dhcp_stop(netif); + } + return result; +} + +/** + * Inform a DHCP server of our manual configuration. + * + * This informs DHCP servers of our fixed IP address configuration + * by sending an INFORM message. It does not involve DHCP address + * configuration, it is just here to be nice to the network. + * + * @param netif The lwIP network interface + * + */ +void dhcp_inform(struct netif *netif) +{ + struct dhcp *dhcp; + err_t result = ERR_OK; + dhcp = mem_malloc(sizeof(struct dhcp)); + if (dhcp == NULL) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("dhcp_inform(): could not allocate dhcp\n")); + return; + } + netif->dhcp = dhcp; + memset(dhcp, 0, sizeof(struct dhcp)); + + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_inform(): allocated dhcp\n")); + dhcp->pcb = udp_new(); + if (dhcp->pcb == NULL) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("dhcp_inform(): could not obtain pcb")); + mem_free((void *)dhcp); + return; + } + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_inform(): created new udp pcb\n")); + /* create and initialize the DHCP message header */ + result = dhcp_create_request(netif); + if (result == ERR_OK) { + + dhcp_option(dhcp, DHCP_OPTION_MESSAGE_TYPE, DHCP_OPTION_MESSAGE_TYPE_LEN); + dhcp_option_byte(dhcp, DHCP_INFORM); + + dhcp_option(dhcp, DHCP_OPTION_MAX_MSG_SIZE, DHCP_OPTION_MAX_MSG_SIZE_LEN); + /* TODO: use netif->mtu ?! */ + dhcp_option_short(dhcp, 576); + + dhcp_option_trailer(dhcp); + + pbuf_realloc(dhcp->p_out, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN + dhcp->options_out_len); + + udp_bind(dhcp->pcb, IP_ADDR_ANY, DHCP_CLIENT_PORT); + udp_connect(dhcp->pcb, IP_ADDR_BROADCAST, DHCP_SERVER_PORT); + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_inform: INFORMING\n")); + udp_send(dhcp->pcb, dhcp->p_out); + udp_connect(dhcp->pcb, IP_ADDR_ANY, DHCP_SERVER_PORT); + dhcp_delete_request(netif); + } else { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("dhcp_inform: could not allocate DHCP request\n")); + } + + if (dhcp != NULL) + { + if (dhcp->pcb != NULL) udp_remove(dhcp->pcb); + dhcp->pcb = NULL; + mem_free((void *)dhcp); + netif->dhcp = NULL; + } +} + +#if DHCP_DOES_ARP_CHECK +/** + * Match an ARP reply with the offered IP address. + * + * @param addr The IP address we received a reply from + * + */ +void dhcp_arp_reply(struct netif *netif, struct ip_addr *addr) +{ + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 3, ("dhcp_arp_reply()\n")); + /* is this DHCP client doing an ARP check? */ + if ((netif->dhcp != NULL) && (netif->dhcp->state == DHCP_CHECKING)) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_arp_reply(): CHECKING, arp reply for 0x%08lx\n", addr->addr)); + /* did a host respond with the address we + were offered by the DHCP server? */ + if (ip_addr_cmp(addr, &netif->dhcp->offered_ip_addr)) { + /* we will not accept the offered address */ + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE | 1, ("dhcp_arp_reply(): arp reply matched with offered address, declining\n")); + dhcp_decline(netif); + } + } +} + +/** + * Decline an offered lease. + * + * Tell the DHCP server we do not accept the offered address. + * One reason to decline the lease is when we find out the address + * is already in use by another host (through ARP). + */ +static err_t dhcp_decline(struct netif *netif) +{ + struct dhcp *dhcp = netif->dhcp; + err_t result = ERR_OK; + u16_t msecs; + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 3, ("dhcp_decline()\n")); + dhcp_set_state(dhcp, DHCP_BACKING_OFF); + /* create and initialize the DHCP message header */ + result = dhcp_create_request(netif); + if (result == ERR_OK) + { + dhcp_option(dhcp, DHCP_OPTION_MESSAGE_TYPE, DHCP_OPTION_MESSAGE_TYPE_LEN); + dhcp_option_byte(dhcp, DHCP_DECLINE); + + dhcp_option(dhcp, DHCP_OPTION_MAX_MSG_SIZE, DHCP_OPTION_MAX_MSG_SIZE_LEN); + dhcp_option_short(dhcp, 576); + + dhcp_option(dhcp, DHCP_OPTION_REQUESTED_IP, 4); + dhcp_option_long(dhcp, ntohl(dhcp->offered_ip_addr.addr)); + + dhcp_option_trailer(dhcp); + /* resize pbuf to reflect true size of options */ + pbuf_realloc(dhcp->p_out, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN + dhcp->options_out_len); + + udp_bind(dhcp->pcb, IP_ADDR_ANY, DHCP_CLIENT_PORT); + udp_connect(dhcp->pcb, &dhcp->server_ip_addr, DHCP_SERVER_PORT); + udp_send(dhcp->pcb, dhcp->p_out); + dhcp_delete_request(netif); + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_decline: BACKING OFF\n")); + } else { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("dhcp_decline: could not allocate DHCP request\n")); + } + dhcp->tries++; + msecs = 10*1000; + dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS; + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_decline(): set request timeout %u msecs\n", msecs)); + return result; +} +#endif + + +/** + * Start the DHCP process, discover a DHCP server. + * + */ +static err_t dhcp_discover(struct netif *netif) +{ + struct dhcp *dhcp = netif->dhcp; + err_t result = ERR_OK; + u16_t msecs; + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 3, ("dhcp_discover()\n")); + ip_addr_set(&dhcp->offered_ip_addr, IP_ADDR_ANY); + /* create and initialize the DHCP message header */ + result = dhcp_create_request(netif); + if (result == ERR_OK) + { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_discover: making request\n")); + dhcp_option(dhcp, DHCP_OPTION_MESSAGE_TYPE, DHCP_OPTION_MESSAGE_TYPE_LEN); + dhcp_option_byte(dhcp, DHCP_DISCOVER); + + dhcp_option(dhcp, DHCP_OPTION_MAX_MSG_SIZE, DHCP_OPTION_MAX_MSG_SIZE_LEN); + dhcp_option_short(dhcp, 576); + + dhcp_option(dhcp, DHCP_OPTION_PARAMETER_REQUEST_LIST, 3); + dhcp_option_byte(dhcp, DHCP_OPTION_SUBNET_MASK); + dhcp_option_byte(dhcp, DHCP_OPTION_ROUTER); + dhcp_option_byte(dhcp, DHCP_OPTION_BROADCAST); + + dhcp_option_trailer(dhcp); + + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_discover: realloc()ing\n")); + pbuf_realloc(dhcp->p_out, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN + dhcp->options_out_len); + + /* set receive callback function with netif as user data */ + udp_recv(dhcp->pcb, dhcp_recv, netif); + udp_bind(dhcp->pcb, IP_ADDR_ANY, DHCP_CLIENT_PORT); + udp_connect(dhcp->pcb, IP_ADDR_ANY, DHCP_SERVER_PORT); + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_discover: sendto(DISCOVER, IP_ADDR_BROADCAST, DHCP_SERVER_PORT)\n")); + udp_sendto(dhcp->pcb, dhcp->p_out, IP_ADDR_BROADCAST, DHCP_SERVER_PORT); + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_discover: deleting()ing\n")); + dhcp_delete_request(netif); + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_discover: SELECTING\n")); + dhcp_set_state(dhcp, DHCP_SELECTING); + } else { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("dhcp_discover: could not allocate DHCP request\n")); + } + dhcp->tries++; + msecs = dhcp->tries < 4 ? (dhcp->tries + 1) * 1000 : 10 * 1000; + dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS; + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_discover(): set request timeout %u msecs\n", msecs)); + return result; +} + + +/** + * Bind the interface to the offered IP address. + * + * @param netif network interface to bind to the offered address + */ +static void dhcp_bind(struct netif *netif) +{ + struct dhcp *dhcp = netif->dhcp; + struct ip_addr sn_mask, gw_addr; + LWIP_ASSERT("dhcp_bind: netif != NULL", netif != NULL); + LWIP_ASSERT("dhcp_bind: dhcp != NULL", dhcp != NULL); + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 3, ("dhcp_bind(netif=%p) %c%c%u\n", netif, netif->name[0], netif->name[1], netif->num)); + + /* temporary DHCP lease? */ + if (dhcp->offered_t1_renew != 0xffffffffUL) { + /* set renewal period timer */ + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_bind(): t1 renewal timer %lu secs\n", dhcp->offered_t1_renew)); + dhcp->t1_timeout = (dhcp->offered_t1_renew + DHCP_COARSE_TIMER_SECS / 2) / DHCP_COARSE_TIMER_SECS; + if (dhcp->t1_timeout == 0) dhcp->t1_timeout = 1; + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_bind(): set request timeout %u msecs\n", dhcp->offered_t1_renew*1000)); + } + /* set renewal period timer */ + if (dhcp->offered_t2_rebind != 0xffffffffUL) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_bind(): t2 rebind timer %lu secs\n", dhcp->offered_t2_rebind)); + dhcp->t2_timeout = (dhcp->offered_t2_rebind + DHCP_COARSE_TIMER_SECS / 2) / DHCP_COARSE_TIMER_SECS; + if (dhcp->t2_timeout == 0) dhcp->t2_timeout = 1; + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_bind(): set request timeout %u msecs\n", dhcp->offered_t2_rebind*1000)); + } + /* copy offered network mask */ + ip_addr_set(&sn_mask, &dhcp->offered_sn_mask); + + /* subnet mask not given? */ + /* TODO: this is not a valid check. what if the network mask is 0? */ + if (sn_mask.addr == 0) { + /* choose a safe subnet mask given the network class */ + u8_t first_octet = ip4_addr1(&sn_mask); + if (first_octet <= 127) sn_mask.addr = htonl(0xff000000); + else if (first_octet >= 192) sn_mask.addr = htonl(0xffffff00); + else sn_mask.addr = htonl(0xffff0000); + } + + ip_addr_set(&gw_addr, &dhcp->offered_gw_addr); + /* gateway address not given? */ + if (gw_addr.addr == 0) { + /* copy network address */ + gw_addr.addr = (dhcp->offered_ip_addr.addr & sn_mask.addr); + /* use first host address on network as gateway */ + gw_addr.addr |= htonl(0x00000001); + } + + LWIP_DEBUGF(DHCP_DEBUG | DBG_STATE, ("dhcp_bind(): IP: 0x%08lx\n", dhcp->offered_ip_addr.addr)); + netif_set_ipaddr(netif, &dhcp->offered_ip_addr); + LWIP_DEBUGF(DHCP_DEBUG | DBG_STATE, ("dhcp_bind(): SN: 0x%08lx\n", sn_mask.addr)); + netif_set_netmask(netif, &sn_mask); + LWIP_DEBUGF(DHCP_DEBUG | DBG_STATE, ("dhcp_bind(): GW: 0x%08lx\n", gw_addr.addr)); + netif_set_gw(netif, &gw_addr); + /* netif is now bound to DHCP leased address */ + dhcp_set_state(dhcp, DHCP_BOUND); +} + +/** + * Renew an existing DHCP lease at the involved DHCP server. + * + * @param netif network interface which must renew its lease + */ +err_t dhcp_renew(struct netif *netif) +{ + struct dhcp *dhcp = netif->dhcp; + err_t result; + u16_t msecs; + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 3, ("dhcp_renew()\n")); + dhcp_set_state(dhcp, DHCP_RENEWING); + + /* create and initialize the DHCP message header */ + result = dhcp_create_request(netif); + if (result == ERR_OK) { + + dhcp_option(dhcp, DHCP_OPTION_MESSAGE_TYPE, DHCP_OPTION_MESSAGE_TYPE_LEN); + dhcp_option_byte(dhcp, DHCP_REQUEST); + + dhcp_option(dhcp, DHCP_OPTION_MAX_MSG_SIZE, DHCP_OPTION_MAX_MSG_SIZE_LEN); + /* TODO: use netif->mtu in some way */ + dhcp_option_short(dhcp, 576); + +#if 0 + dhcp_option(dhcp, DHCP_OPTION_REQUESTED_IP, 4); + dhcp_option_long(dhcp, ntohl(dhcp->offered_ip_addr.addr)); +#endif + +#if 0 + dhcp_option(dhcp, DHCP_OPTION_SERVER_ID, 4); + dhcp_option_long(dhcp, ntohl(dhcp->server_ip_addr.addr)); +#endif + /* append DHCP message trailer */ + dhcp_option_trailer(dhcp); + + pbuf_realloc(dhcp->p_out, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN + dhcp->options_out_len); + + udp_bind(dhcp->pcb, IP_ADDR_ANY, DHCP_CLIENT_PORT); + udp_connect(dhcp->pcb, &dhcp->server_ip_addr, DHCP_SERVER_PORT); + udp_send(dhcp->pcb, dhcp->p_out); + dhcp_delete_request(netif); + + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_renew: RENEWING\n")); + } else { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("dhcp_renew: could not allocate DHCP request\n")); + } + dhcp->tries++; + /* back-off on retries, but to a maximum of 20 seconds */ + msecs = dhcp->tries < 10 ? dhcp->tries * 2000 : 20 * 1000; + dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS; + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_renew(): set request timeout %u msecs\n", msecs)); + return result; +} + +/** + * Rebind with a DHCP server for an existing DHCP lease. + * + * @param netif network interface which must rebind with a DHCP server + */ +static err_t dhcp_rebind(struct netif *netif) +{ + struct dhcp *dhcp = netif->dhcp; + err_t result; + u16_t msecs; + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_rebind()\n")); + dhcp_set_state(dhcp, DHCP_REBINDING); + + /* create and initialize the DHCP message header */ + result = dhcp_create_request(netif); + if (result == ERR_OK) + { + + dhcp_option(dhcp, DHCP_OPTION_MESSAGE_TYPE, DHCP_OPTION_MESSAGE_TYPE_LEN); + dhcp_option_byte(dhcp, DHCP_REQUEST); + + dhcp_option(dhcp, DHCP_OPTION_MAX_MSG_SIZE, DHCP_OPTION_MAX_MSG_SIZE_LEN); + dhcp_option_short(dhcp, 576); + +#if 0 + dhcp_option(dhcp, DHCP_OPTION_REQUESTED_IP, 4); + dhcp_option_long(dhcp, ntohl(dhcp->offered_ip_addr.addr)); + + dhcp_option(dhcp, DHCP_OPTION_SERVER_ID, 4); + dhcp_option_long(dhcp, ntohl(dhcp->server_ip_addr.addr)); +#endif + + dhcp_option_trailer(dhcp); + + pbuf_realloc(dhcp->p_out, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN + dhcp->options_out_len); + + /* set remote IP association to any DHCP server */ + udp_bind(dhcp->pcb, IP_ADDR_ANY, DHCP_CLIENT_PORT); + udp_connect(dhcp->pcb, IP_ADDR_ANY, DHCP_SERVER_PORT); + /* broadcast to server */ + udp_sendto(dhcp->pcb, dhcp->p_out, IP_ADDR_BROADCAST, DHCP_SERVER_PORT); + dhcp_delete_request(netif); + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_rebind: REBINDING\n")); + } else { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("dhcp_rebind: could not allocate DHCP request\n")); + } + dhcp->tries++; + msecs = dhcp->tries < 10 ? dhcp->tries * 1000 : 10 * 1000; + dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS; + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_rebind(): set request timeout %u msecs\n", msecs)); + return result; +} + +/** + * Release a DHCP lease. + * + * @param netif network interface which must release its lease + */ +static err_t dhcp_release(struct netif *netif) +{ + struct dhcp *dhcp = netif->dhcp; + err_t result; + u16_t msecs; + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 3, ("dhcp_release()\n")); + + /* idle DHCP client */ + dhcp_set_state(dhcp, DHCP_OFF); + + + /* create and initialize the DHCP message header */ + result = dhcp_create_request(netif); + if (result == ERR_OK) { + dhcp_option(dhcp, DHCP_OPTION_MESSAGE_TYPE, DHCP_OPTION_MESSAGE_TYPE_LEN); + dhcp_option_byte(dhcp, DHCP_RELEASE); + + dhcp_option_trailer(dhcp); + + pbuf_realloc(dhcp->p_out, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN + dhcp->options_out_len); + + udp_bind(dhcp->pcb, IP_ADDR_ANY, DHCP_CLIENT_PORT); + udp_connect(dhcp->pcb, &dhcp->server_ip_addr, DHCP_SERVER_PORT); + udp_send(dhcp->pcb, dhcp->p_out); + dhcp_delete_request(netif); + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_release: RELEASED, DHCP_OFF\n")); + } else { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("dhcp_release: could not allocate DHCP request\n")); + } + dhcp->tries++; + msecs = dhcp->tries < 10 ? dhcp->tries * 1000 : 10 * 1000; + dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS; + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_release(): set request timeout %u msecs\n", msecs)); + /* remove IP address from interface */ + netif_set_ipaddr(netif, IP_ADDR_ANY); + netif_set_gw(netif, IP_ADDR_ANY); + netif_set_netmask(netif, IP_ADDR_ANY); + /* TODO: netif_down(netif); */ + return result; +} +/** + * Remove the DHCP client from the interface. + * + * @param netif The network interface to stop DHCP on + */ +void dhcp_stop(struct netif *netif) +{ + struct dhcp *dhcp = netif->dhcp; + LWIP_ASSERT("dhcp_stop: netif != NULL", netif != NULL); + + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 3, ("dhcp_stop()\n")); + /* netif is DHCP configured? */ + if (dhcp != NULL) + { + if (dhcp->pcb != NULL) + { + udp_remove(dhcp->pcb); + dhcp->pcb = NULL; + } + if (dhcp->p != NULL) + { + pbuf_free(dhcp->p); + dhcp->p = NULL; + } + /* free unfolded reply */ + dhcp_free_reply(dhcp); + mem_free((void *)dhcp); + netif->dhcp = NULL; + } +} + +/* + * Set the DHCP state of a DHCP client. + * + * If the state changed, reset the number of tries. + * + * TODO: we might also want to reset the timeout here? + */ +static void dhcp_set_state(struct dhcp *dhcp, unsigned char new_state) +{ + if (new_state != dhcp->state) + { + dhcp->state = new_state; + dhcp->tries = 0; + } +} + +/* + * Concatenate an option type and length field to the outgoing + * DHCP message. + * + */ +static void dhcp_option(struct dhcp *dhcp, u8_t option_type, u8_t option_len) +{ + LWIP_ASSERT("dhcp_option_short: dhcp->options_out_len + 2 + option_len <= DHCP_OPTIONS_LEN", dhcp->options_out_len + 2 + option_len <= DHCP_OPTIONS_LEN); + dhcp->msg_out->options[dhcp->options_out_len++] = option_type; + dhcp->msg_out->options[dhcp->options_out_len++] = option_len; +} +/* + * Concatenate a single byte to the outgoing DHCP message. + * + */ +static void dhcp_option_byte(struct dhcp *dhcp, u8_t value) +{ + LWIP_ASSERT("dhcp_option_short: dhcp->options_out_len < DHCP_OPTIONS_LEN", dhcp->options_out_len < DHCP_OPTIONS_LEN); + dhcp->msg_out->options[dhcp->options_out_len++] = value; +} +static void dhcp_option_short(struct dhcp *dhcp, u16_t value) +{ + LWIP_ASSERT("dhcp_option_short: dhcp->options_out_len + 2 <= DHCP_OPTIONS_LEN", dhcp->options_out_len + 2 <= DHCP_OPTIONS_LEN); + dhcp->msg_out->options[dhcp->options_out_len++] = (value & 0xff00U) >> 8; + dhcp->msg_out->options[dhcp->options_out_len++] = value & 0x00ffU; +} +static void dhcp_option_long(struct dhcp *dhcp, u32_t value) +{ + LWIP_ASSERT("dhcp_option_long: dhcp->options_out_len + 4 <= DHCP_OPTIONS_LEN", dhcp->options_out_len + 4 <= DHCP_OPTIONS_LEN); + dhcp->msg_out->options[dhcp->options_out_len++] = (value & 0xff000000UL) >> 24; + dhcp->msg_out->options[dhcp->options_out_len++] = (value & 0x00ff0000UL) >> 16; + dhcp->msg_out->options[dhcp->options_out_len++] = (value & 0x0000ff00UL) >> 8; + dhcp->msg_out->options[dhcp->options_out_len++] = (value & 0x000000ffUL); +} + +/** + * Extract the DHCP message and the DHCP options. + * + * Extract the DHCP message and the DHCP options, each into a contiguous + * piece of memory. As a DHCP message is variable sized by its options, + * and also allows overriding some fields for options, the easy approach + * is to first unfold the options into a conitguous piece of memory, and + * use that further on. + * + */ +static err_t dhcp_unfold_reply(struct dhcp *dhcp) +{ + struct pbuf *p = dhcp->p; + u8_t *ptr; + u16_t i; + u16_t j = 0; + LWIP_ASSERT("dhcp->p != NULL", dhcp->p != NULL); + /* free any left-overs from previous unfolds */ + dhcp_free_reply(dhcp); + /* options present? */ + if (dhcp->p->tot_len > (sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN)) + { + dhcp->options_in_len = dhcp->p->tot_len - (sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN); + dhcp->options_in = mem_malloc(dhcp->options_in_len); + if (dhcp->options_in == NULL) + { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("dhcp_unfold_reply(): could not allocate dhcp->options\n")); + return ERR_MEM; + } + } + dhcp->msg_in = mem_malloc(sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN); + if (dhcp->msg_in == NULL) + { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("dhcp_unfold_reply(): could not allocate dhcp->msg_in\n")); + mem_free((void *)dhcp->options_in); + dhcp->options_in = NULL; + return ERR_MEM; + } + + ptr = (u8_t *)dhcp->msg_in; + /* proceed through struct dhcp_msg */ + for (i = 0; i < sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN; i++) + { + *ptr++ = ((u8_t *)p->payload)[j++]; + /* reached end of pbuf? */ + if (j == p->len) + { + /* proceed to next pbuf in chain */ + p = p->next; + j = 0; + } + } + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_unfold_reply(): copied %u bytes into dhcp->msg_in[]\n", i)); + if (dhcp->options_in != NULL) { + ptr = (u8_t *)dhcp->options_in; + /* proceed through options */ + for (i = 0; i < dhcp->options_in_len; i++) { + *ptr++ = ((u8_t *)p->payload)[j++]; + /* reached end of pbuf? */ + if (j == p->len) { + /* proceed to next pbuf in chain */ + p = p->next; + j = 0; + } + } + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_unfold_reply(): copied %u bytes to dhcp->options_in[]\n", i)); + } + return ERR_OK; +} + +/** + * Free the incoming DHCP message including contiguous copy of + * its DHCP options. + * + */ +static void dhcp_free_reply(struct dhcp *dhcp) +{ + if (dhcp->msg_in != NULL) { + mem_free((void *)dhcp->msg_in); + dhcp->msg_in = NULL; + } + if (dhcp->options_in) { + mem_free((void *)dhcp->options_in); + dhcp->options_in = NULL; + dhcp->options_in_len = 0; + } + LWIP_DEBUGF(DHCP_DEBUG, ("dhcp_free_reply(): free'd\n")); +} + + +/** + * If an incoming DHCP message is in response to us, then trigger the state machine + */ +static void dhcp_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, struct ip_addr *addr, u16_t port) +{ + struct netif *netif = (struct netif *)arg; + struct dhcp *dhcp = netif->dhcp; + struct dhcp_msg *reply_msg = (struct dhcp_msg *)p->payload; + u8_t *options_ptr; + u8_t msg_type; + u8_t i; + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 3, ("dhcp_recv(pbuf = %p) from DHCP server %u.%u.%u.%u port %u\n", p, + (unsigned int)(ntohl(addr->addr) >> 24 & 0xff), (unsigned int)(ntohl(addr->addr) >> 16 & 0xff), + (unsigned int)(ntohl(addr->addr) >> 8 & 0xff), (unsigned int)(ntohl(addr->addr) & 0xff), port)); + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE, ("pbuf->len = %u\n", p->len)); + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE, ("pbuf->tot_len = %u\n", p->tot_len)); + /* prevent warnings about unused arguments */ + (void)pcb; (void)addr; (void)port; + dhcp->p = p; + /* TODO: check packet length before reading them */ + if (reply_msg->op != DHCP_BOOTREPLY) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 1, ("not a DHCP reply message, but type %u\n", reply_msg->op)); + pbuf_free(p); + dhcp->p = NULL; + return; + } + /* iterate through hardware address and match against DHCP message */ + for (i = 0; i < netif->hwaddr_len; i++) { + if (netif->hwaddr[i] != reply_msg->chaddr[i]) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("netif->hwaddr[%u]==%02x != reply_msg->chaddr[%u]==%02x\n", + i, netif->hwaddr[i], i, reply_msg->chaddr[i])); + pbuf_free(p); + dhcp->p = NULL; + return; + } + } + /* match transaction ID against what we expected */ + if (ntohl(reply_msg->xid) != dhcp->xid) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("transaction id mismatch\n")); + pbuf_free(p); + dhcp->p = NULL; + return; + } + /* option fields could be unfold? */ + if (dhcp_unfold_reply(dhcp) != ERR_OK) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("problem unfolding DHCP message - too short on memory?\n")); + pbuf_free(p); + dhcp->p = NULL; + return; + } + + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE, ("searching DHCP_OPTION_MESSAGE_TYPE\n")); + /* obtain pointer to DHCP message type */ + options_ptr = dhcp_get_option_ptr(dhcp, DHCP_OPTION_MESSAGE_TYPE); + if (options_ptr == NULL) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 1, ("DHCP_OPTION_MESSAGE_TYPE option not found\n")); + pbuf_free(p); + dhcp->p = NULL; + return; + } + + /* read DHCP message type */ + msg_type = dhcp_get_option_byte(options_ptr + 2); + /* message type is DHCP ACK? */ + if (msg_type == DHCP_ACK) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 1, ("DHCP_ACK received\n")); + /* in requesting state? */ + if (dhcp->state == DHCP_REQUESTING) { + dhcp_handle_ack(netif); + dhcp->request_timeout = 0; +#if DHCP_DOES_ARP_CHECK + /* check if the acknowledged lease address is already in use */ + dhcp_check(netif); +#else + /* bind interface to the acknowledged lease address */ + dhcp_bind(netif); +#endif + } + /* already bound to the given lease address? */ + else if ((dhcp->state == DHCP_REBOOTING) || (dhcp->state == DHCP_REBINDING) || (dhcp->state == DHCP_RENEWING)) { + dhcp->request_timeout = 0; + dhcp_bind(netif); + } + } + /* received a DHCP_NAK in appropriate state? */ + else if ((msg_type == DHCP_NAK) && + ((dhcp->state == DHCP_REBOOTING) || (dhcp->state == DHCP_REQUESTING) || + (dhcp->state == DHCP_REBINDING) || (dhcp->state == DHCP_RENEWING ))) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 1, ("DHCP_NAK received\n")); + dhcp->request_timeout = 0; + dhcp_handle_nak(netif); + } + /* received a DHCP_OFFER in DHCP_SELECTING state? */ + else if ((msg_type == DHCP_OFFER) && (dhcp->state == DHCP_SELECTING)) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 1, ("DHCP_OFFER received in DHCP_SELECTING state\n")); + dhcp->request_timeout = 0; + /* remember offered lease */ + dhcp_handle_offer(netif); + } + pbuf_free(p); + dhcp->p = NULL; +} + + +static err_t dhcp_create_request(struct netif *netif) +{ + struct dhcp *dhcp = netif->dhcp; + u16_t i; + LWIP_ASSERT("dhcp_create_request: dhcp->p_out == NULL", dhcp->p_out == NULL); + LWIP_ASSERT("dhcp_create_request: dhcp->msg_out == NULL", dhcp->msg_out == NULL); + dhcp->p_out = pbuf_alloc(PBUF_TRANSPORT, sizeof(struct dhcp_msg), PBUF_RAM); + if (dhcp->p_out == NULL) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("dhcp_create_request(): could not allocate pbuf\n")); + return ERR_MEM; + } + /* give unique transaction identifier to this request */ + dhcp->xid = xid++; + + dhcp->msg_out = (struct dhcp_msg *)dhcp->p_out->payload; + + dhcp->msg_out->op = DHCP_BOOTREQUEST; + /* TODO: make link layer independent */ + dhcp->msg_out->htype = DHCP_HTYPE_ETH; + /* TODO: make link layer independent */ + dhcp->msg_out->hlen = DHCP_HLEN_ETH; + dhcp->msg_out->hops = 0; + dhcp->msg_out->xid = htonl(dhcp->xid); + dhcp->msg_out->secs = 0; + dhcp->msg_out->flags = 0; + dhcp->msg_out->ciaddr.addr = netif->ip_addr.addr; + dhcp->msg_out->yiaddr.addr = 0; + dhcp->msg_out->siaddr.addr = 0; + dhcp->msg_out->giaddr.addr = 0; + for (i = 0; i < DHCP_CHADDR_LEN; i++) { + /* copy netif hardware address, pad with zeroes */ + dhcp->msg_out->chaddr[i] = (i < netif->hwaddr_len) ? netif->hwaddr[i] : 0/* pad byte*/; + } + for (i = 0; i < DHCP_SNAME_LEN; i++) dhcp->msg_out->sname[i] = 0; + for (i = 0; i < DHCP_FILE_LEN; i++) dhcp->msg_out->file[i] = 0; + dhcp->msg_out->cookie = htonl(0x63825363UL); + dhcp->options_out_len = 0; + /* fill options field with an incrementing array (for debugging purposes) */ + for (i = 0; i < DHCP_OPTIONS_LEN; i++) dhcp->msg_out->options[i] = i; + return ERR_OK; +} + +static void dhcp_delete_request(struct netif *netif) +{ + struct dhcp *dhcp = netif->dhcp; + LWIP_ASSERT("dhcp_free_msg: dhcp->p_out != NULL", dhcp->p_out != NULL); + LWIP_ASSERT("dhcp_free_msg: dhcp->msg_out != NULL", dhcp->msg_out != NULL); + pbuf_free(dhcp->p_out); + dhcp->p_out = NULL; + dhcp->msg_out = NULL; +} + +/** + * Add a DHCP message trailer + * + * Adds the END option to the DHCP message, and if + * necessary, up to three padding bytes. + */ + +static void dhcp_option_trailer(struct dhcp *dhcp) +{ + LWIP_ASSERT("dhcp_option_trailer: dhcp->msg_out != NULL\n", dhcp->msg_out != NULL); + LWIP_ASSERT("dhcp_option_trailer: dhcp->options_out_len < DHCP_OPTIONS_LEN\n", dhcp->options_out_len < DHCP_OPTIONS_LEN); + dhcp->msg_out->options[dhcp->options_out_len++] = DHCP_OPTION_END; + /* packet is too small, or not 4 byte aligned? */ + while ((dhcp->options_out_len < DHCP_MIN_OPTIONS_LEN) || (dhcp->options_out_len & 3)) { + /* LWIP_DEBUGF(DHCP_DEBUG, ("dhcp_option_trailer: dhcp->options_out_len=%u, DHCP_OPTIONS_LEN=%u", dhcp->options_out_len, DHCP_OPTIONS_LEN)); */ + LWIP_ASSERT("dhcp_option_trailer: dhcp->options_out_len < DHCP_OPTIONS_LEN\n", dhcp->options_out_len < DHCP_OPTIONS_LEN); + /* add a fill/padding byte */ + dhcp->msg_out->options[dhcp->options_out_len++] = 0; + } +} + +/** + * Find the offset of a DHCP option inside the DHCP message. + * + * @param client DHCP client + * @param option_type + * + * @return a byte offset into the UDP message where the option was found, or + * zero if the given option was not found. + */ +static u8_t *dhcp_get_option_ptr(struct dhcp *dhcp, u8_t option_type) +{ + u8_t overload = DHCP_OVERLOAD_NONE; + + /* options available? */ + if ((dhcp->options_in != NULL) && (dhcp->options_in_len > 0)) { + /* start with options field */ + u8_t *options = (u8_t *)dhcp->options_in; + u16_t offset = 0; + /* at least 1 byte to read and no end marker, then at least 3 bytes to read? */ + while ((offset < dhcp->options_in_len) && (options[offset] != DHCP_OPTION_END)) { + /* LWIP_DEBUGF(DHCP_DEBUG, ("msg_offset=%u, q->len=%u", msg_offset, q->len)); */ + /* are the sname and/or file field overloaded with options? */ + if (options[offset] == DHCP_OPTION_OVERLOAD) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("overloaded message detected\n")); + /* skip option type and length */ + offset += 2; + overload = options[offset++]; + } + /* requested option found */ + else if (options[offset] == option_type) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE, ("option found at offset %u in options\n", offset)); + return &options[offset]; + /* skip option */ + } else { + LWIP_DEBUGF(DHCP_DEBUG, ("skipping option %u in options\n", options[offset])); + /* skip option type */ + offset++; + /* skip option length, and then length bytes */ + offset += 1 + options[offset]; + } + } + /* is this an overloaded message? */ + if (overload != DHCP_OVERLOAD_NONE) { + u16_t field_len; + if (overload == DHCP_OVERLOAD_FILE) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 1, ("overloaded file field\n")); + options = (u8_t *)&dhcp->msg_in->file; + field_len = DHCP_FILE_LEN; + } else if (overload == DHCP_OVERLOAD_SNAME) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 1, ("overloaded sname field\n")); + options = (u8_t *)&dhcp->msg_in->sname; + field_len = DHCP_SNAME_LEN; + /* TODO: check if else if () is necessary */ + } else { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 1, ("overloaded sname and file field\n")); + options = (u8_t *)&dhcp->msg_in->sname; + field_len = DHCP_FILE_LEN + DHCP_SNAME_LEN; + } + offset = 0; + + /* at least 1 byte to read and no end marker */ + while ((offset < field_len) && (options[offset] != DHCP_OPTION_END)) { + if (options[offset] == option_type) { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE, ("option found at offset=%u\n", offset)); + return &options[offset]; + /* skip option */ + } else { + LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE, ("skipping option %u\n", options[offset])); + /* skip option type */ + offset++; + offset += 1 + options[offset]; + } + } + } + } + return 0; +} + +/** + * Return the byte of DHCP option data. + * + * @param client DHCP client. + * @param ptr pointer obtained by dhcp_get_option_ptr(). + * + * @return byte value at the given address. + */ +static u8_t dhcp_get_option_byte(u8_t *ptr) +{ + LWIP_DEBUGF(DHCP_DEBUG, ("option byte value=%u\n", *ptr)); + return *ptr; +} + +/** + * Return the 16-bit value of DHCP option data. + * + * @param client DHCP client. + * @param ptr pointer obtained by dhcp_get_option_ptr(). + * + * @return byte value at the given address. + */ +static u16_t dhcp_get_option_short(u8_t *ptr) +{ + u16_t value; + value = *ptr++ << 8; + value |= *ptr; + LWIP_DEBUGF(DHCP_DEBUG, ("option short value=%u\n", value)); + return value; +} + +/** + * Return the 32-bit value of DHCP option data. + * + * @param client DHCP client. + * @param ptr pointer obtained by dhcp_get_option_ptr(). + * + * @return byte value at the given address. + */ +static u32_t dhcp_get_option_long(u8_t *ptr) +{ + u32_t value; + value = (u32_t)(*ptr++) << 24; + value |= (u32_t)(*ptr++) << 16; + value |= (u32_t)(*ptr++) << 8; + value |= (u32_t)(*ptr++); + LWIP_DEBUGF(DHCP_DEBUG, ("option long value=%lu\n", value)); + return value; +} + +#endif /* LWIP_DHCP */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/core/inet.c @@ -0,0 +1,365 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + + +/* inet.c + * + * Functions common to all TCP/IP modules, such as the Internet checksum and the + * byte order functions. + * + */ + + +#include "lwip/opt.h" + +#include "lwip/arch.h" + +#include "lwip/def.h" +#include "lwip/inet.h" + + + +static u16_t +lwip_chksum(void *dataptr, int len) +{ + u32_t acc; + + LWIP_DEBUGF(INET_DEBUG, ("lwip_chksum(%p, %d)\n", (void *)dataptr, len)); + for(acc = 0; len > 1; len -= 2) { + /* acc = acc + *((u16_t *)dataptr)++;*/ + acc += *(u16_t *)dataptr; + dataptr = (void *)((u16_t *)dataptr + 1); + } + + /* add up any odd byte */ + if (len == 1) { + acc += htons((u16_t)((*(u8_t *)dataptr) & 0xff) << 8); + LWIP_DEBUGF(INET_DEBUG, ("inet: chksum: odd byte %d\n", (unsigned int)(*(u8_t *)dataptr))); + } else { + LWIP_DEBUGF(INET_DEBUG, ("inet: chksum: no odd byte\n")); + } + acc = (acc >> 16) + (acc & 0xffffUL); + + if ((acc & 0xffff0000) != 0) { + acc = (acc >> 16) + (acc & 0xffffUL); + } + + return (u16_t)acc; +} + +/* inet_chksum_pseudo: + * + * Calculates the pseudo Internet checksum used by TCP and UDP for a pbuf chain. + */ + +u16_t +inet_chksum_pseudo(struct pbuf *p, + struct ip_addr *src, struct ip_addr *dest, + u8_t proto, u16_t proto_len) +{ + u32_t acc; + struct pbuf *q; + u8_t swapped; + + acc = 0; + swapped = 0; + /* iterate through all pbuf in chain */ + for(q = p; q != NULL; q = q->next) { + LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): checksumming pbuf %p (has next %p) \n", + (void *)q, (void *)q->next)); + acc += lwip_chksum(q->payload, q->len); + /*LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): unwrapped lwip_chksum()=%lx \n", acc));*/ + while (acc >> 16) { + acc = (acc & 0xffffUL) + (acc >> 16); + } + if (q->len % 2 != 0) { + swapped = 1 - swapped; + acc = ((acc & 0xff) << 8) | ((acc & 0xff00UL) >> 8); + } + /*LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): wrapped lwip_chksum()=%lx \n", acc));*/ + } + + if (swapped) { + acc = ((acc & 0xff) << 8) | ((acc & 0xff00UL) >> 8); + } + acc += (src->addr & 0xffffUL); + acc += ((src->addr >> 16) & 0xffffUL); + acc += (dest->addr & 0xffffUL); + acc += ((dest->addr >> 16) & 0xffffUL); + acc += (u32_t)htons((u16_t)proto); + acc += (u32_t)htons(proto_len); + + while (acc >> 16) { + acc = (acc & 0xffffUL) + (acc >> 16); + } + LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): pbuf chain lwip_chksum()=%lx\n", acc)); + return ~(acc & 0xffffUL); +} + +/* inet_chksum: + * + * Calculates the Internet checksum over a portion of memory. Used primarely for IP + * and ICMP. + */ + +u16_t +inet_chksum(void *dataptr, u16_t len) +{ + u32_t acc; + + acc = lwip_chksum(dataptr, len); + while (acc >> 16) { + acc = (acc & 0xffff) + (acc >> 16); + } + return ~(acc & 0xffff); +} + +u16_t +inet_chksum_pbuf(struct pbuf *p) +{ + u32_t acc; + struct pbuf *q; + u8_t swapped; + + acc = 0; + swapped = 0; + for(q = p; q != NULL; q = q->next) { + acc += lwip_chksum(q->payload, q->len); + while (acc >> 16) { + acc = (acc & 0xffffUL) + (acc >> 16); + } + if (q->len % 2 != 0) { + swapped = 1 - swapped; + acc = (acc & 0x00ffUL << 8) | (acc & 0xff00UL >> 8); + } + } + + if (swapped) { + acc = ((acc & 0x00ffUL) << 8) | ((acc & 0xff00UL) >> 8); + } + return ~(acc & 0xffffUL); +} + +/* Here for now until needed in other places in lwIP */ +#ifndef isascii +#define in_range(c, lo, up) ((u8_t)c >= lo && (u8_t)c <= up) +#define isascii(c) in_range(c, 0x20, 0x7f) +#define isdigit(c) in_range(c, '0', '9') +#define isxdigit(c) (isdigit(c) || in_range(c, 'a', 'f') || in_range(c, 'A', 'F')) +#define islower(c) in_range(c, 'a', 'z') +#define isspace(c) (c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' || c == '\v') +#endif + + + /* + * Ascii internet address interpretation routine. + * The value returned is in network order. + */ + + /* */ + /* inet_addr */ + u32_t inet_addr(const char *cp) + { + struct in_addr val; + + if (inet_aton(cp, &val)) { + return (val.s_addr); + } + return (INADDR_NONE); + } + + /* + * Check whether "cp" is a valid ascii representation + * of an Internet address and convert to a binary address. + * Returns 1 if the address is valid, 0 if not. + * This replaces inet_addr, the return value from which + * cannot distinguish between failure and a local broadcast address. + */ + /* */ + /* inet_aton */ + int inet_aton(const char *cp, struct in_addr *addr) + { + u32_t val; + int base, n; + char c; + u32_t parts[4]; + u32_t* pp = parts; + + c = *cp; + for (;;) { + /* + * Collect number up to ``.''. + * Values are specified as for C: + * 0x=hex, 0=octal, isdigit=decimal. + */ + if (!isdigit(c)) + return (0); + val = 0; base = 10; + if (c == '0') { + c = *++cp; + if (c == 'x' || c == 'X') + base = 16, c = *++cp; + else + base = 8; + } + for (;;) { + if (isascii(c) && isdigit(c)) { + val = (val * base) + (c - '0'); + c = *++cp; + } else if (base == 16 && isascii(c) && isxdigit(c)) { + val = (val << 4) | + (c + 10 - (islower(c) ? 'a' : 'A')); + c = *++cp; + } else + break; + } + if (c == '.') { + /* + * Internet format: + * a.b.c.d + * a.b.c (with c treated as 16 bits) + * a.b (with b treated as 24 bits) + */ + if (pp >= parts + 3) + return (0); + *pp++ = val; + c = *++cp; + } else + break; + } + /* + * Check for trailing characters. + */ + if (c != '\0' && (!isascii(c) || !isspace(c))) + return (0); + /* + * Concoct the address according to + * the number of parts specified. + */ + n = pp - parts + 1; + switch (n) { + + case 0: + return (0); /* initial nondigit */ + + case 1: /* a -- 32 bits */ + break; + + case 2: /* a.b -- 8.24 bits */ + if (val > 0xffffff) + return (0); + val |= parts[0] << 24; + break; + + case 3: /* a.b.c -- 8.8.16 bits */ + if (val > 0xffff) + return (0); + val |= (parts[0] << 24) | (parts[1] << 16); + break; + + case 4: /* a.b.c.d -- 8.8.8.8 bits */ + if (val > 0xff) + return (0); + val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8); + break; + } + if (addr) + addr->s_addr = htonl(val); + return (1); + } + +/* Convert numeric IP address into decimal dotted ASCII representation. + * returns ptr to static buffer; not reentrant! + */ +char *inet_ntoa(struct in_addr addr) +{ + static u8_t str[16]; + u32_t s_addr = addr.s_addr; + u8_t inv[3]; + u8_t *rp; + u8_t *ap; + u8_t rem; + u8_t n; + u8_t i; + + rp = str; + ap = (char *)&s_addr; + for(n = 0; n < 4; n++) { + i = 0; + do { + rem = *ap % (u8_t)10; + *ap /= (u8_t)10; + inv[i++] = '0' + rem; + } while(*ap); + while(i--) + *rp++ = inv[i]; + *rp++ = '.'; + ap++; + } + *--rp = 0; + return str; +} + + +#ifndef BYTE_ORDER +#error BYTE_ORDER is not defined +#endif +#if BYTE_ORDER == LITTLE_ENDIAN + +u16_t +htons(u16_t n) +{ + return ((n & 0xff) << 8) | ((n & 0xff00) >> 8); +} + +u16_t +ntohs(u16_t n) +{ + return htons(n); +} + +u32_t +htonl(u32_t n) +{ + return ((n & 0xff) << 24) | + ((n & 0xff00) << 8) | + ((n & 0xff0000) >> 8) | + ((n & 0xff000000) >> 24); +} + +u32_t +ntohl(u32_t n) +{ + return htonl(n); +} + +#endif /* BYTE_ORDER == LITTLE_ENDIAN */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/core/ipv4/icmp.c @@ -0,0 +1,203 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + +/* Some ICMP messages should be passed to the transport protocols. This + is not implemented. */ + +#include "lwip/opt.h" + +#include "lwip/icmp.h" +#include "lwip/inet.h" +#include "lwip/ip.h" +#include "lwip/def.h" + +#include "lwip/stats.h" + +#include "lwip/snmp.h" + +void +icmp_input(struct pbuf *p, struct netif *inp) +{ + unsigned char type; + unsigned char code; + struct icmp_echo_hdr *iecho; + struct ip_hdr *iphdr; + struct ip_addr tmpaddr; + u16_t hlen; + + ICMP_STATS_INC(icmp.recv); + snmp_inc_icmpinmsgs(); + + + iphdr = p->payload; + hlen = IPH_HL(iphdr) * 4; + if (pbuf_header(p, -((s16_t)hlen)) || (p->tot_len < sizeof(u16_t)*2)) { + LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: short ICMP (%u bytes) received\n", p->tot_len)); + pbuf_free(p); + ICMP_STATS_INC(icmp.lenerr); + snmp_inc_icmpinerrors(); + return; + } + + type = *((u8_t *)p->payload); + code = *(((u8_t *)p->payload)+1); + switch (type) { + case ICMP_ECHO: + /* broadcast or multicast destination address? */ + if (ip_addr_isbroadcast(&iphdr->dest, inp) || ip_addr_ismulticast(&iphdr->dest)) { + LWIP_DEBUGF(ICMP_DEBUG, ("Smurf.\n")); + ICMP_STATS_INC(icmp.err); + pbuf_free(p); + return; + } + LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: ping\n")); + if (p->tot_len < sizeof(struct icmp_echo_hdr)) { + LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: bad ICMP echo received\n")); + pbuf_free(p); + ICMP_STATS_INC(icmp.lenerr); + snmp_inc_icmpinerrors(); + + return; + } + iecho = p->payload; + if (inet_chksum_pbuf(p) != 0) { + LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: checksum failed for received ICMP echo\n")); + pbuf_free(p); + ICMP_STATS_INC(icmp.chkerr); + snmp_inc_icmpinerrors(); + return; + } + tmpaddr.addr = iphdr->src.addr; + iphdr->src.addr = iphdr->dest.addr; + iphdr->dest.addr = tmpaddr.addr; + ICMPH_TYPE_SET(iecho, ICMP_ER); + /* adjust the checksum */ + if (iecho->chksum >= htons(0xffff - (ICMP_ECHO << 8))) { + iecho->chksum += htons(ICMP_ECHO << 8) + 1; + } else { + iecho->chksum += htons(ICMP_ECHO << 8); + } + ICMP_STATS_INC(icmp.xmit); + /* increase number of messages attempted to send */ + snmp_inc_icmpoutmsgs(); + /* increase number of echo replies attempted to send */ + snmp_inc_icmpoutechoreps(); + + pbuf_header(p, hlen); + ip_output_if(p, &(iphdr->src), IP_HDRINCL, + IPH_TTL(iphdr), 0, IP_PROTO_ICMP, inp); + break; + default: + LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: ICMP type %d code %d not supported.\n", (int)type, (int)code)); + ICMP_STATS_INC(icmp.proterr); + ICMP_STATS_INC(icmp.drop); + } + pbuf_free(p); +} + +void +icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t) +{ + struct pbuf *q; + struct ip_hdr *iphdr; + struct icmp_dur_hdr *idur; + + q = pbuf_alloc(PBUF_IP, 8 + IP_HLEN + 8, PBUF_RAM); + /* ICMP header + IP header + 8 bytes of data */ + + iphdr = p->payload; + + idur = q->payload; + ICMPH_TYPE_SET(idur, ICMP_DUR); + ICMPH_CODE_SET(idur, t); + + memcpy((char *)q->payload + 8, p->payload, IP_HLEN + 8); + + /* calculate checksum */ + idur->chksum = 0; + idur->chksum = inet_chksum(idur, q->len); + ICMP_STATS_INC(icmp.xmit); + /* increase number of messages attempted to send */ + snmp_inc_icmpoutmsgs(); + /* increase number of destination unreachable messages attempted to send */ + snmp_inc_icmpoutdestunreachs(); + + ip_output(q, NULL, &(iphdr->src), + ICMP_TTL, 0, IP_PROTO_ICMP); + pbuf_free(q); +} + +#if IP_FORWARD +void +icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t) +{ + struct pbuf *q; + struct ip_hdr *iphdr; + struct icmp_te_hdr *tehdr; + + q = pbuf_alloc(PBUF_IP, 8 + IP_HLEN + 8, PBUF_RAM); + + iphdr = p->payload; + LWIP_DEBUGF(ICMP_DEBUG, ("icmp_time_exceeded from ")); + ip_addr_debug_print(ICMP_DEBUG, &(iphdr->src)); + LWIP_DEBUGF(ICMP_DEBUG, (" to ")); + ip_addr_debug_print(ICMP_DEBUG, &(iphdr->dest)); + LWIP_DEBUGF(ICMP_DEBUG, ("\n")); + + tehdr = q->payload; + ICMPH_TYPE_SET(tehdr, ICMP_TE); + ICMPH_CODE_SET(tehdr, t); + + /* copy fields from original packet */ + memcpy((char *)q->payload + 8, (char *)p->payload, IP_HLEN + 8); + + /* calculate checksum */ + tehdr->chksum = 0; + tehdr->chksum = inet_chksum(tehdr, q->len); + ICMP_STATS_INC(icmp.xmit); + /* increase number of messages attempted to send */ + snmp_inc_icmpoutmsgs(); + /* increase number of destination unreachable messages attempted to send */ + snmp_inc_icmpouttimeexcds(); + ip_output(q, NULL, &(iphdr->src), + ICMP_TTL, 0, IP_PROTO_ICMP); + pbuf_free(q); +} + +#endif /* IP_FORWARD */ + + + + + + +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/core/ipv4/ip.c @@ -0,0 +1,515 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + + + +/* ip.c + * + * This is the code for the IP layer. + * + */ + + +#include "lwip/opt.h" + + +#include "lwip/def.h" +#include "lwip/mem.h" +#include "lwip/ip.h" +#include "lwip/ip_frag.h" +#include "lwip/inet.h" +#include "lwip/netif.h" +#include "lwip/icmp.h" +#include "lwip/raw.h" +#include "lwip/udp.h" +#include "lwip/tcp.h" + +#include "lwip/stats.h" + +#include "arch/perf.h" + +#include "lwip/snmp.h" +#if LWIP_DHCP +# include "lwip/dhcp.h" +#endif /* LWIP_DHCP */ + + +/* ip_init: + * + * Initializes the IP layer. + */ + +void +ip_init(void) +{ +} + +/* ip_route: + * + * Finds the appropriate network interface for a given IP address. It + * searches the list of network interfaces linearly. A match is found + * if the masked IP address of the network interface equals the masked + * IP address given to the function. + */ + +struct netif * +ip_route(struct ip_addr *dest) +{ + struct netif *netif; + + /* iterate through netifs */ + for(netif = netif_list; netif != NULL; netif = netif->next) { + /* network mask matches? */ + if (ip_addr_maskcmp(dest, &(netif->ip_addr), &(netif->netmask))) { + /* return netif on which to forward IP packet */ + return netif; + } + } + /* no matching netif found, use default netif */ + return netif_default; +} +#if IP_FORWARD + +/* ip_forward: + * + * Forwards an IP packet. It finds an appropriate route for the + * packet, decrements the TTL value of the packet, adjusts the + * checksum and outputs the packet on the appropriate interface. + */ + +static void +ip_forward(struct pbuf *p, struct ip_hdr *iphdr, struct netif *inp) +{ + struct netif *netif; + + PERF_START; + /* Find network interface where to forward this IP packet to. */ + netif = ip_route((struct ip_addr *)&(iphdr->dest)); + if (netif == NULL) { + LWIP_DEBUGF(IP_DEBUG, ("ip_forward: no forwarding route for 0x%lx found\n", + iphdr->dest.addr)); + snmp_inc_ipnoroutes(); + return; + } + /* Do not forward packets onto the same network interface on which + they arrived. */ + if (netif == inp) { + LWIP_DEBUGF(IP_DEBUG, ("ip_forward: not bouncing packets back on incoming interface.\n")); + snmp_inc_ipnoroutes(); + return; + } + + /* decrement TTL */ + IPH_TTL_SET(iphdr, IPH_TTL(iphdr) - 1); + /* send ICMP if TTL == 0 */ + if (IPH_TTL(iphdr) == 0) { + /* Don't send ICMP messages in response to ICMP messages */ + if (IPH_PROTO(iphdr) != IP_PROTO_ICMP) { + icmp_time_exceeded(p, ICMP_TE_TTL); + snmp_inc_icmpouttimeexcds(); + } + return; + } + + /* Incrementally update the IP checksum. */ + if (IPH_CHKSUM(iphdr) >= htons(0xffff - 0x100)) { + IPH_CHKSUM_SET(iphdr, IPH_CHKSUM(iphdr) + htons(0x100) + 1); + } else { + IPH_CHKSUM_SET(iphdr, IPH_CHKSUM(iphdr) + htons(0x100)); + } + + LWIP_DEBUGF(IP_DEBUG, ("ip_forward: forwarding packet to 0x%lx\n", + iphdr->dest.addr)); + + IP_STATS_INC(ip.fw); + IP_STATS_INC(ip.xmit); + snmp_inc_ipforwdatagrams(); + + PERF_STOP("ip_forward"); + /* transmit pbuf on chosen interface */ + netif->output(netif, p, (struct ip_addr *)&(iphdr->dest)); +} +#endif /* IP_FORWARD */ + +/* ip_input: + * + * This function is called by the network interface device driver when + * an IP packet is received. The function does the basic checks of the + * IP header such as packet size being at least larger than the header + * size etc. If the packet was not destined for us, the packet is + * forwarded (using ip_forward). The IP checksum is always checked. + * + * Finally, the packet is sent to the upper layer protocol input function. + */ + +err_t +ip_input(struct pbuf *p, struct netif *inp) { + static struct ip_hdr *iphdr; + static struct netif *netif; + static u16_t iphdrlen; + + IP_STATS_INC(ip.recv); + snmp_inc_ipinreceives(); + + /* identify the IP header */ + iphdr = p->payload; + if (IPH_V(iphdr) != 4) { + LWIP_DEBUGF(IP_DEBUG | 1, ("IP packet dropped due to bad version number %u\n", IPH_V(iphdr))); + ip_debug_print(p); + pbuf_free(p); + IP_STATS_INC(ip.err); + IP_STATS_INC(ip.drop); + snmp_inc_ipunknownprotos(); + return ERR_OK; + } + /* obtain IP header length in number of 32-bit words */ + iphdrlen = IPH_HL(iphdr); + /* calculate IP header length in bytes */ + iphdrlen *= 4; + + /* header length exceeds first pbuf length? */ + if (iphdrlen > p->len) { + LWIP_DEBUGF(IP_DEBUG | 2, ("IP header (len %u) does not fit in first pbuf (len %u), IP packet droppped.\n", + iphdrlen, p->len)); + /* free (drop) packet pbufs */ + pbuf_free(p); + IP_STATS_INC(ip.lenerr); + IP_STATS_INC(ip.drop); + snmp_inc_ipindiscards(); + return ERR_OK; + } + + /* verify checksum */ +#if CHECKSUM_CHECK_IP + if (inet_chksum(iphdr, iphdrlen) != 0) { + + LWIP_DEBUGF(IP_DEBUG | 2, ("Checksum (0x%x) failed, IP packet dropped.\n", inet_chksum(iphdr, iphdrlen))); + ip_debug_print(p); + pbuf_free(p); + IP_STATS_INC(ip.chkerr); + IP_STATS_INC(ip.drop); + snmp_inc_ipindiscards(); + return ERR_OK; + } +#endif + + /* Trim pbuf. This should have been done at the netif layer, + but we'll do it anyway just to be sure that its done. */ + pbuf_realloc(p, ntohs(IPH_LEN(iphdr))); + + /* is this packet for us? */ + for(netif = netif_list; netif != NULL; netif = netif->next) { + + LWIP_DEBUGF(IP_DEBUG, ("ip_input: iphdr->dest 0x%lx netif->ip_addr 0x%lx (0x%lx, 0x%lx, 0x%lx)\n", + iphdr->dest.addr, netif->ip_addr.addr, + iphdr->dest.addr & netif->netmask.addr, + netif->ip_addr.addr & netif->netmask.addr, + iphdr->dest.addr & ~(netif->netmask.addr))); + + /* interface configured? */ + if (!ip_addr_isany(&(netif->ip_addr))) + { + /* unicast to this interface address? */ + if (ip_addr_cmp(&(iphdr->dest), &(netif->ip_addr)) || + /* or broadcast matching this interface network address? */ + (ip_addr_isbroadcast(&(iphdr->dest), netif) && + ip_addr_maskcmp(&(iphdr->dest), &(netif->ip_addr), &(netif->netmask))) || + /* or restricted broadcast? */ + ip_addr_cmp(&(iphdr->dest), IP_ADDR_BROADCAST)) { + LWIP_DEBUGF(IP_DEBUG, ("ip_input: packet accepted on interface %c%c\n", + netif->name[0], netif->name[1])); + /* break out of for loop */ + break; + } + } + } +#if LWIP_DHCP + /* Pass DHCP messages regardless of destination address. DHCP traffic is addressed + using link layer addressing (such as Ethernet MAC) so we must not filter on IP. + According to RFC 1542 section 3.1.1, referred by RFC 2131). */ + if (netif == NULL) { + /* remote port is DHCP server? */ + if (IPH_PROTO(iphdr) == IP_PROTO_UDP) { + LWIP_DEBUGF(IP_DEBUG | DBG_TRACE | 1, ("ip_input: UDP packet to DHCP client port %u\n", + ntohs(((struct udp_hdr *)((u8_t *)iphdr + iphdrlen))->dest))); + if (ntohs(((struct udp_hdr *)((u8_t *)iphdr + iphdrlen))->dest) == DHCP_CLIENT_PORT) { + LWIP_DEBUGF(IP_DEBUG | DBG_TRACE | 1, ("ip_input: DHCP packet accepted.\n")); + netif = inp; + } + } + } +#endif /* LWIP_DHCP */ + /* packet not for us? */ + if (netif == NULL) { + /* packet not for us, route or discard */ + LWIP_DEBUGF(IP_DEBUG | DBG_TRACE | 1, ("ip_input: packet not for us.\n")); +#if IP_FORWARD + /* non-broadcast packet? */ + if (!ip_addr_isbroadcast(&(iphdr->dest), inp)) { + /* try to forward IP packet on (other) interfaces */ + ip_forward(p, iphdr, inp); + } + else +#endif /* IP_FORWARD */ + { + snmp_inc_ipindiscards(); + } + pbuf_free(p); + return ERR_OK; + } + +#if IP_REASSEMBLY + if ((IPH_OFFSET(iphdr) & htons(IP_OFFMASK | IP_MF)) != 0) { + LWIP_DEBUGF(IP_DEBUG, ("IP packet is a fragment (id=0x%04x tot_len=%u len=%u MF=%u offset=%u), calling ip_reass()\n", + ntohs(IPH_ID(iphdr)), p->tot_len, ntohs(IPH_LEN(iphdr)), !!(IPH_OFFSET(iphdr) & htons(IP_MF)), (ntohs(IPH_OFFSET(iphdr)) & IP_OFFMASK)*8)); + p = ip_reass(p); + if (p == NULL) { + return ERR_OK; + } + iphdr = p->payload; + } +#else /* IP_REASSEMBLY */ + if ((IPH_OFFSET(iphdr) & htons(IP_OFFMASK | IP_MF)) != 0) { + pbuf_free(p); + LWIP_DEBUGF(IP_DEBUG | 2, ("IP packet dropped since it was fragmented (0x%x) (while IP_REASSEMBLY == 0).\n", + ntohs(IPH_OFFSET(iphdr)))); + IP_STATS_INC(ip.opterr); + IP_STATS_INC(ip.drop); + snmp_inc_ipunknownprotos(); + return ERR_OK; + } +#endif /* IP_REASSEMBLY */ + +#if IP_OPTIONS == 0 + if (iphdrlen > IP_HLEN) { + LWIP_DEBUGF(IP_DEBUG | 2, ("IP packet dropped since there were IP options (while IP_OPTIONS == 0).\n")); + pbuf_free(p); + IP_STATS_INC(ip.opterr); + IP_STATS_INC(ip.drop); + snmp_inc_ipunknownprotos(); + return ERR_OK; + } +#endif /* IP_OPTIONS == 0 */ + + /* send to upper layers */ + LWIP_DEBUGF(IP_DEBUG, ("ip_input: \n")); + ip_debug_print(p); + LWIP_DEBUGF(IP_DEBUG, ("ip_input: p->len %d p->tot_len %d\n", p->len, p->tot_len)); + +#if LWIP_RAW + if (!raw_input(p, inp)) { +#endif /* LWIP_RAW */ + + switch (IPH_PROTO(iphdr)) { +#if LWIP_UDP + case IP_PROTO_UDP: + case IP_PROTO_UDPLITE: + snmp_inc_ipindelivers(); + udp_input(p, inp); + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case IP_PROTO_TCP: + snmp_inc_ipindelivers(); + tcp_input(p, inp); + break; +#endif /* LWIP_TCP */ + case IP_PROTO_ICMP: + snmp_inc_ipindelivers(); + icmp_input(p, inp); + break; + default: + /* send ICMP destination protocol unreachable unless is was a broadcast */ + if (!ip_addr_isbroadcast(&(iphdr->dest), inp) && + !ip_addr_ismulticast(&(iphdr->dest))) { + p->payload = iphdr; + icmp_dest_unreach(p, ICMP_DUR_PROTO); + } + pbuf_free(p); + + LWIP_DEBUGF(IP_DEBUG | 2, ("Unsupported transport protocol %d\n", IPH_PROTO(iphdr))); + + IP_STATS_INC(ip.proterr); + IP_STATS_INC(ip.drop); + snmp_inc_ipunknownprotos(); + + } +#if LWIP_RAW + } /* LWIP_RAW */ +#endif + return ERR_OK; +} + + +/* ip_output_if: + * + * Sends an IP packet on a network interface. This function constructs + * the IP header and calculates the IP header checksum. If the source + * IP address is NULL, the IP address of the outgoing network + * interface is filled in as source address. + */ + +err_t +ip_output_if(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest, + u8_t ttl, u8_t tos, + u8_t proto, struct netif *netif) +{ + static struct ip_hdr *iphdr; + static u16_t ip_id = 0; + + snmp_inc_ipoutrequests(); + + if (dest != IP_HDRINCL) { + if (pbuf_header(p, IP_HLEN)) { + LWIP_DEBUGF(IP_DEBUG | 2, ("ip_output: not enough room for IP header in pbuf\n")); + + IP_STATS_INC(ip.err); + snmp_inc_ipoutdiscards(); + return ERR_BUF; + } + + iphdr = p->payload; + + IPH_TTL_SET(iphdr, ttl); + IPH_PROTO_SET(iphdr, proto); + + ip_addr_set(&(iphdr->dest), dest); + + IPH_VHLTOS_SET(iphdr, 4, IP_HLEN / 4, tos); + IPH_LEN_SET(iphdr, htons(p->tot_len)); + IPH_OFFSET_SET(iphdr, htons(IP_DF)); + IPH_ID_SET(iphdr, htons(ip_id)); + ++ip_id; + + if (ip_addr_isany(src)) { + ip_addr_set(&(iphdr->src), &(netif->ip_addr)); + } else { + ip_addr_set(&(iphdr->src), src); + } + + IPH_CHKSUM_SET(iphdr, 0); +#if CHECKSUM_GEN_IP + IPH_CHKSUM_SET(iphdr, inet_chksum(iphdr, IP_HLEN)); +#endif + } else { + iphdr = p->payload; + dest = &(iphdr->dest); + } + +#if IP_FRAG + /* don't fragment if interface has mtu set to 0 [loopif] */ + if (netif->mtu && (p->tot_len > netif->mtu)) + return ip_frag(p,netif,dest); +#endif + + IP_STATS_INC(ip.xmit); + + LWIP_DEBUGF(IP_DEBUG, ("ip_output_if: %c%c%u\n", netif->name[0], netif->name[1], netif->num)); + ip_debug_print(p); + + LWIP_DEBUGF(IP_DEBUG, ("netif->output()")); + + return netif->output(netif, p, dest); +} + +/* ip_output: + * + * Simple interface to ip_output_if. It finds the outgoing network + * interface and calls upon ip_output_if to do the actual work. + */ + +err_t +ip_output(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest, + u8_t ttl, u8_t tos, u8_t proto) +{ + struct netif *netif; + + if ((netif = ip_route(dest)) == NULL) { + LWIP_DEBUGF(IP_DEBUG | 2, ("ip_output: No route to 0x%lx\n", dest->addr)); + + IP_STATS_INC(ip.rterr); + snmp_inc_ipoutdiscards(); + return ERR_RTE; + } + + return ip_output_if(p, src, dest, ttl, tos, proto, netif); +} + +#if IP_DEBUG +void +ip_debug_print(struct pbuf *p) +{ + struct ip_hdr *iphdr = p->payload; + u8_t *payload; + + payload = (u8_t *)iphdr + IP_HLEN; + + LWIP_DEBUGF(IP_DEBUG, ("IP header:\n")); + LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(IP_DEBUG, ("|%2d |%2d | 0x%02x | %5u | (v, hl, tos, len)\n", + IPH_V(iphdr), + IPH_HL(iphdr), + IPH_TOS(iphdr), + ntohs(IPH_LEN(iphdr)))); + LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(IP_DEBUG, ("| %5u |%u%u%u| %4u | (id, flags, offset)\n", + ntohs(IPH_ID(iphdr)), + ntohs(IPH_OFFSET(iphdr)) >> 15 & 1, + ntohs(IPH_OFFSET(iphdr)) >> 14 & 1, + ntohs(IPH_OFFSET(iphdr)) >> 13 & 1, + ntohs(IPH_OFFSET(iphdr)) & IP_OFFMASK)); + LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(IP_DEBUG, ("| %3u | %3u | 0x%04x | (ttl, proto, chksum)\n", + IPH_TTL(iphdr), + IPH_PROTO(iphdr), + ntohs(IPH_CHKSUM(iphdr)))); + LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(IP_DEBUG, ("| %3ld | %3ld | %3ld | %3ld | (src)\n", + ntohl(iphdr->src.addr) >> 24 & 0xff, + ntohl(iphdr->src.addr) >> 16 & 0xff, + ntohl(iphdr->src.addr) >> 8 & 0xff, + ntohl(iphdr->src.addr) & 0xff)); + LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(IP_DEBUG, ("| %3ld | %3ld | %3ld | %3ld | (dest)\n", + ntohl(iphdr->dest.addr) >> 24 & 0xff, + ntohl(iphdr->dest.addr) >> 16 & 0xff, + ntohl(iphdr->dest.addr) >> 8 & 0xff, + ntohl(iphdr->dest.addr) & 0xff)); + LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n")); +} +#endif /* IP_DEBUG */ + + + + + +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/core/ipv4/ip_addr.c @@ -0,0 +1,69 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + +#include "lwip/ip_addr.h" +#include "lwip/inet.h" +#include "lwip/netif.h" + +/* used by IP_ADDR_ANY and IP_ADDR_BROADCAST in ip_addr.h */ +const struct ip_addr ip_addr_any = { 0x00000000UL }; +const struct ip_addr ip_addr_broadcast = { 0xffffffffUL }; + +/* Determine if an address is a broadcast address on a network interface + * + * @param addr address to be checked + * @param netif the network interface against which the address is checked + * @return returns non-zero if the address is a broadcast address + * + */ + +u8_t ip_addr_isbroadcast(struct ip_addr *addr, struct netif *netif) +{ + /* all ones (broadcast) or all zeroes (old skool broadcast) */ + if ((addr->addr == ip_addr_broadcast.addr) || + (addr->addr == ip_addr_any.addr)) + return 1; + /* no broadcast support on this network interface? */ + else if ((netif->flags & NETIF_FLAG_BROADCAST) == 0) + /* the given address cannot be a broadcast address + * nor can we check against any broadcast addresses */ + return 0; + /* address matches network interface address exactly? => no broadcast */ + else if (addr->addr == netif->ip_addr.addr) + return 0; + /* host identifier bits are all ones? => network broadcast address */ + else if ((addr->addr & ~netif->netmask.addr) == + (ip_addr_broadcast.addr & ~netif->netmask.addr)) + return 1; + else + return 0; +}
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/core/ipv4/ip_frag.c @@ -0,0 +1,347 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Jani Monoses <jani@iv.ro> + * original reassembly code by Adam Dunkels <adam@sics.se> + * + */ + + +/* ip_frag.c + * + * This is the code for IP segmentation and reassembly + * + */ + + +#include "lwip/opt.h" +#include "lwip/sys.h" +#include "lwip/ip.h" +#include "lwip/ip_frag.h" +#include "lwip/netif.h" + +#include "lwip/stats.h" + + +/* + * Copy len bytes from offset in pbuf to buffer + * + * helper used by both ip_reass and ip_frag + */ +static struct pbuf * +copy_from_pbuf(struct pbuf *p, u16_t * offset, + u8_t * buffer, u16_t len) +{ + u16_t l; + + p->payload = (u8_t *)p->payload + *offset; + p->len -= *offset; + while (len) { + l = len < p->len ? len : p->len; + memcpy(buffer, p->payload, l); + buffer += l; + len -= l; + if (len) + p = p->next; + else + *offset = l; + } + return p; +} + +#define IP_REASS_BUFSIZE 5760 +#define IP_REASS_MAXAGE 30 +#define IP_REASS_TMO 1000 + +static u8_t ip_reassbuf[IP_HLEN + IP_REASS_BUFSIZE]; +static u8_t ip_reassbitmap[IP_REASS_BUFSIZE / (8 * 8)]; +static const u8_t bitmap_bits[8] = { 0xff, 0x7f, 0x3f, 0x1f, + 0x0f, 0x07, 0x03, 0x01 +}; +static u16_t ip_reasslen; +static u8_t ip_reassflags; +#define IP_REASS_FLAG_LASTFRAG 0x01 + +static u8_t ip_reasstmr; + +/* Reassembly timer */ +static void +ip_reass_timer(void *arg) +{ + (void)arg; + if (ip_reasstmr > 1) { + ip_reasstmr--; + sys_timeout(IP_REASS_TMO, ip_reass_timer, NULL); + } else if (ip_reasstmr == 1) + ip_reasstmr = 0; +} + +struct pbuf * +ip_reass(struct pbuf *p) +{ + struct pbuf *q; + struct ip_hdr *fraghdr, *iphdr; + u16_t offset, len; + u16_t i; + + IPFRAG_STATS_INC(ip_frag.recv); + + iphdr = (struct ip_hdr *) ip_reassbuf; + fraghdr = (struct ip_hdr *) p->payload; + /* If ip_reasstmr is zero, no packet is present in the buffer, so we + write the IP header of the fragment into the reassembly + buffer. The timer is updated with the maximum age. */ + if (ip_reasstmr == 0) { + LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_reass: new packet\n")); + memcpy(iphdr, fraghdr, IP_HLEN); + ip_reasstmr = IP_REASS_MAXAGE; + sys_timeout(IP_REASS_TMO, ip_reass_timer, NULL); + ip_reassflags = 0; + /* Clear the bitmap. */ + memset(ip_reassbitmap, 0, sizeof(ip_reassbitmap)); + } + + /* Check if the incoming fragment matches the one currently present + in the reasembly buffer. If so, we proceed with copying the + fragment into the buffer. */ + if (ip_addr_cmp(&iphdr->src, &fraghdr->src) && + ip_addr_cmp(&iphdr->dest, &fraghdr->dest) && + IPH_ID(iphdr) == IPH_ID(fraghdr)) { + LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_reass: matching old packet\n")); + IPFRAG_STATS_INC(ip_frag.cachehit); + /* Find out the offset in the reassembly buffer where we should + copy the fragment. */ + len = ntohs(IPH_LEN(fraghdr)) - IPH_HL(fraghdr) * 4; + offset = (ntohs(IPH_OFFSET(fraghdr)) & IP_OFFMASK) * 8; + + /* If the offset or the offset + fragment length overflows the + reassembly buffer, we discard the entire packet. */ + if (offset > IP_REASS_BUFSIZE || offset + len > IP_REASS_BUFSIZE) { + LWIP_DEBUGF(IP_REASS_DEBUG, + ("ip_reass: fragment outside of buffer (%d:%d/%d).\n", offset, + offset + len, IP_REASS_BUFSIZE)); + sys_untimeout(ip_reass_timer, NULL); + ip_reasstmr = 0; + goto nullreturn; + } + + /* Copy the fragment into the reassembly buffer, at the right + offset. */ + LWIP_DEBUGF(IP_REASS_DEBUG, + ("ip_reass: copying with offset %d into %d:%d\n", offset, + IP_HLEN + offset, IP_HLEN + offset + len)); + i = IPH_HL(fraghdr) * 4; + copy_from_pbuf(p, &i, &ip_reassbuf[IP_HLEN + offset], len); + + /* Update the bitmap. */ + if (offset / (8 * 8) == (offset + len) / (8 * 8)) { + LWIP_DEBUGF(IP_REASS_DEBUG, + ("ip_reass: updating single byte in bitmap.\n")); + /* If the two endpoints are in the same byte, we only update + that byte. */ + ip_reassbitmap[offset / (8 * 8)] |= + bitmap_bits[(offset / 8) & 7] & + ~bitmap_bits[((offset + len) / 8) & 7]; + } else { + /* If the two endpoints are in different bytes, we update the + bytes in the endpoints and fill the stuff inbetween with + 0xff. */ + ip_reassbitmap[offset / (8 * 8)] |= bitmap_bits[(offset / 8) & 7]; + LWIP_DEBUGF(IP_REASS_DEBUG, + ("ip_reass: updating many bytes in bitmap (%d:%d).\n", + 1 + offset / (8 * 8), (offset + len) / (8 * 8))); + for (i = 1 + offset / (8 * 8); i < (offset + len) / (8 * 8); ++i) { + ip_reassbitmap[i] = 0xff; + } + ip_reassbitmap[(offset + len) / (8 * 8)] |= + ~bitmap_bits[((offset + len) / 8) & 7]; + } + + /* If this fragment has the More Fragments flag set to zero, we + know that this is the last fragment, so we can calculate the + size of the entire packet. We also set the + IP_REASS_FLAG_LASTFRAG flag to indicate that we have received + the final fragment. */ + + if ((ntohs(IPH_OFFSET(fraghdr)) & IP_MF) == 0) { + ip_reassflags |= IP_REASS_FLAG_LASTFRAG; + ip_reasslen = offset + len; + LWIP_DEBUGF(IP_REASS_DEBUG, + ("ip_reass: last fragment seen, total len %d\n", + ip_reasslen)); + } + + /* Finally, we check if we have a full packet in the buffer. We do + this by checking if we have the last fragment and if all bits + in the bitmap are set. */ + if (ip_reassflags & IP_REASS_FLAG_LASTFRAG) { + /* Check all bytes up to and including all but the last byte in + the bitmap. */ + for (i = 0; i < ip_reasslen / (8 * 8) - 1; ++i) { + if (ip_reassbitmap[i] != 0xff) { + LWIP_DEBUGF(IP_REASS_DEBUG, + ("ip_reass: last fragment seen, bitmap %d/%d failed (%x)\n", + i, ip_reasslen / (8 * 8) - 1, ip_reassbitmap[i])); + goto nullreturn; + } + } + /* Check the last byte in the bitmap. It should contain just the + right amount of bits. */ + if (ip_reassbitmap[ip_reasslen / (8 * 8)] != + (u8_t) ~ bitmap_bits[ip_reasslen / 8 & 7]) { + LWIP_DEBUGF(IP_REASS_DEBUG, + ("ip_reass: last fragment seen, bitmap %d didn't contain %x (%x)\n", + ip_reasslen / (8 * 8), ~bitmap_bits[ip_reasslen / 8 & 7], + ip_reassbitmap[ip_reasslen / (8 * 8)])); + goto nullreturn; + } + + /* Pretend to be a "normal" (i.e., not fragmented) IP packet + from now on. */ + ip_reasslen += IP_HLEN; + + IPH_LEN_SET(iphdr, htons(ip_reasslen)); + IPH_OFFSET_SET(iphdr, 0); + IPH_CHKSUM_SET(iphdr, 0); + IPH_CHKSUM_SET(iphdr, inet_chksum(iphdr, IP_HLEN)); + + /* If we have come this far, we have a full packet in the + buffer, so we allocate a pbuf and copy the packet into it. We + also reset the timer. */ + sys_untimeout(ip_reass_timer, NULL); + ip_reasstmr = 0; + pbuf_free(p); + p = pbuf_alloc(PBUF_LINK, ip_reasslen, PBUF_POOL); + if (p != NULL) { + i = 0; + for (q = p; q != NULL; q = q->next) { + /* Copy enough bytes to fill this pbuf in the chain. The + available data in the pbuf is given by the q->len + variable. */ + LWIP_DEBUGF(IP_REASS_DEBUG, + ("ip_reass: memcpy from %p (%d) to %p, %d bytes\n", + &ip_reassbuf[i], i, q->payload, + q->len > ip_reasslen - i ? ip_reasslen - i : q->len)); + memcpy(q->payload, &ip_reassbuf[i], + q->len > ip_reasslen - i ? ip_reasslen - i : q->len); + i += q->len; + } + IPFRAG_STATS_INC(ip_frag.fw); + } else { + IPFRAG_STATS_INC(ip_frag.memerr); + } + LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_reass: p %p\n", (void*)p)); + return p; + } + } + +nullreturn: + IPFRAG_STATS_INC(ip_frag.drop); + pbuf_free(p); + return NULL; +} + +#define MAX_MTU 1500 +static u8_t buf[MEM_ALIGN_SIZE(MAX_MTU)]; + +/** + * Fragment an IP packet if too large + * + * Chop the packet in mtu sized chunks and send them in order + * by using a fixed size static memory buffer (PBUF_ROM) + */ +err_t +ip_frag(struct pbuf *p, struct netif *netif, struct ip_addr *dest) +{ + struct pbuf *rambuf; + struct pbuf *header; + struct ip_hdr *iphdr; + u16_t nfb = 0; + u16_t left, cop; + u16_t mtu = netif->mtu; + u16_t ofo, omf; + u16_t last; + u16_t poff = IP_HLEN; + u16_t tmp; + + /* Get a RAM based MTU sized pbuf */ + rambuf = pbuf_alloc(PBUF_LINK, 0, PBUF_REF); + rambuf->tot_len = rambuf->len = mtu; + rambuf->payload = MEM_ALIGN((void *)buf); + + + /* Copy the IP header in it */ + iphdr = rambuf->payload; + memcpy(iphdr, p->payload, IP_HLEN); + + /* Save original offset */ + tmp = ntohs(IPH_OFFSET(iphdr)); + ofo = tmp & IP_OFFMASK; + omf = tmp & IP_MF; + + left = p->tot_len - IP_HLEN; + + while (left) { + last = (left <= mtu - IP_HLEN); + + /* Set new offset and MF flag */ + ofo += nfb; + tmp = omf | (IP_OFFMASK & (ofo)); + if (!last) + tmp = tmp | IP_MF; + IPH_OFFSET_SET(iphdr, htons(tmp)); + + /* Fill this fragment */ + nfb = (mtu - IP_HLEN) / 8; + cop = last ? left : nfb * 8; + + p = copy_from_pbuf(p, &poff, (u8_t *) iphdr + IP_HLEN, cop); + + /* Correct header */ + IPH_LEN_SET(iphdr, htons(cop + IP_HLEN)); + IPH_CHKSUM_SET(iphdr, 0); + IPH_CHKSUM_SET(iphdr, inet_chksum(iphdr, IP_HLEN)); + + if (last) + pbuf_realloc(rambuf, left + IP_HLEN); + /* This part is ugly: we alloc a RAM based pbuf for + * the link level header for each chunk and then + * free it.A PBUF_ROM style pbuf for which pbuf_header + * worked would make things simpler. + */ + header = pbuf_alloc(PBUF_LINK, 0, PBUF_RAM); + pbuf_chain(header, rambuf); + netif->output(netif, header, dest); + IPFRAG_STATS_INC(ip_frag.xmit); + pbuf_free(header); + + left -= cop; + } + pbuf_free(rambuf); + return ERR_OK; +}
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/core/mem.c @@ -0,0 +1,309 @@ +/** @file + * + * Dynamic memory manager + * + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + + +#include "lwip/arch.h" +#include "lwip/opt.h" +#include "lwip/def.h" +#include "lwip/mem.h" + +#include "lwip/sys.h" + +#include "lwip/stats.h" + +struct mem { + mem_size_t next, prev; +#if MEM_ALIGNMENT == 1 + u8_t used; +#elif MEM_ALIGNMENT == 2 + u16_t used; +#elif MEM_ALIGNMENT == 4 + u32_t used; +#elif MEM_ALIGNMENT == 8 + u64_t used; +#else +#error "unhandled MEM_ALIGNMENT size" +#endif /* MEM_ALIGNMENT */ +}; + +static struct mem *ram_end; +static u8_t ram[MEM_SIZE + sizeof(struct mem) + MEM_ALIGNMENT]; + +#define MIN_SIZE 12 +#if 0 /* this one does not align correctly for some, resulting in crashes */ +#define SIZEOF_STRUCT_MEM (unsigned int)MEM_ALIGN_SIZE(sizeof(struct mem)) +#else +#define SIZEOF_STRUCT_MEM (sizeof(struct mem) + \ + (((sizeof(struct mem) % MEM_ALIGNMENT) == 0)? 0 : \ + (4 - (sizeof(struct mem) % MEM_ALIGNMENT)))) +#endif + +static struct mem *lfree; /* pointer to the lowest free block */ + +static sys_sem_t mem_sem; + +static void +plug_holes(struct mem *mem) +{ + struct mem *nmem; + struct mem *pmem; + + LWIP_ASSERT("plug_holes: mem >= ram", (u8_t *)mem >= ram); + LWIP_ASSERT("plug_holes: mem < ram_end", (u8_t *)mem < (u8_t *)ram_end); + LWIP_ASSERT("plug_holes: mem->used == 0", mem->used == 0); + + /* plug hole forward */ + LWIP_ASSERT("plug_holes: mem->next <= MEM_SIZE", mem->next <= MEM_SIZE); + + nmem = (struct mem *)&ram[mem->next]; + if (mem != nmem && nmem->used == 0 && (u8_t *)nmem != (u8_t *)ram_end) { + if (lfree == nmem) { + lfree = mem; + } + mem->next = nmem->next; + ((struct mem *)&ram[nmem->next])->prev = (u8_t *)mem - ram; + } + + /* plug hole backward */ + pmem = (struct mem *)&ram[mem->prev]; + if (pmem != mem && pmem->used == 0) { + if (lfree == mem) { + lfree = pmem; + } + pmem->next = mem->next; + ((struct mem *)&ram[mem->next])->prev = (u8_t *)pmem - ram; + } + +} +void +mem_init(void) +{ + struct mem *mem; + + memset(ram, 0, MEM_SIZE); + mem = (struct mem *)ram; + mem->next = MEM_SIZE; + mem->prev = 0; + mem->used = 0; + ram_end = (struct mem *)&ram[MEM_SIZE]; + ram_end->used = 1; + ram_end->next = MEM_SIZE; + ram_end->prev = MEM_SIZE; + + mem_sem = sys_sem_new(1); + + lfree = (struct mem *)ram; + +#if MEM_STATS + lwip_stats.mem.avail = MEM_SIZE; +#endif /* MEM_STATS */ +} +void +mem_free(void *rmem) +{ + struct mem *mem; + + if (rmem == NULL) { + LWIP_DEBUGF(MEM_DEBUG | DBG_TRACE | 2, ("mem_free(p == NULL) was called.\n")); + return; + } + + sys_sem_wait(mem_sem); + + LWIP_ASSERT("mem_free: legal memory", (u8_t *)rmem >= (u8_t *)ram && + (u8_t *)rmem < (u8_t *)ram_end); + + if ((u8_t *)rmem < (u8_t *)ram || (u8_t *)rmem >= (u8_t *)ram_end) { + LWIP_DEBUGF(MEM_DEBUG | 3, ("mem_free: illegal memory\n")); +#if MEM_STATS + ++lwip_stats.mem.err; +#endif /* MEM_STATS */ + sys_sem_signal(mem_sem); + return; + } + mem = (struct mem *)((u8_t *)rmem - SIZEOF_STRUCT_MEM); + + LWIP_ASSERT("mem_free: mem->used", mem->used); + + mem->used = 0; + + if (mem < lfree) { + lfree = mem; + } + +#if MEM_STATS + lwip_stats.mem.used -= mem->next - ((u8_t *)mem - ram); + +#endif /* MEM_STATS */ + plug_holes(mem); + sys_sem_signal(mem_sem); +} +void * +mem_reallocm(void *rmem, mem_size_t newsize) +{ + void *nmem; + nmem = mem_malloc(newsize); + if (nmem == NULL) { + return mem_realloc(rmem, newsize); + } + memcpy(nmem, rmem, newsize); + mem_free(rmem); + return nmem; +} + +void * +mem_realloc(void *rmem, mem_size_t newsize) +{ + mem_size_t size; + mem_size_t ptr, ptr2; + struct mem *mem, *mem2; + + /* Expand the size of the allocated memory region so that we can + adjust for alignment. */ + if ((newsize % MEM_ALIGNMENT) != 0) { + newsize += MEM_ALIGNMENT - ((newsize + SIZEOF_STRUCT_MEM) % MEM_ALIGNMENT); + } + + if (newsize > MEM_SIZE) { + return NULL; + } + + sys_sem_wait(mem_sem); + + LWIP_ASSERT("mem_realloc: legal memory", (u8_t *)rmem >= (u8_t *)ram && + (u8_t *)rmem < (u8_t *)ram_end); + + if ((u8_t *)rmem < (u8_t *)ram || (u8_t *)rmem >= (u8_t *)ram_end) { + LWIP_DEBUGF(MEM_DEBUG | 3, ("mem_realloc: illegal memory\n")); + return rmem; + } + mem = (struct mem *)((u8_t *)rmem - SIZEOF_STRUCT_MEM); + + ptr = (u8_t *)mem - ram; + + size = mem->next - ptr - SIZEOF_STRUCT_MEM; +#if MEM_STATS + lwip_stats.mem.used -= (size - newsize); +#endif /* MEM_STATS */ + + if (newsize + SIZEOF_STRUCT_MEM + MIN_SIZE < size) { + ptr2 = ptr + SIZEOF_STRUCT_MEM + newsize; + mem2 = (struct mem *)&ram[ptr2]; + mem2->used = 0; + mem2->next = mem->next; + mem2->prev = ptr; + mem->next = ptr2; + if (mem2->next != MEM_SIZE) { + ((struct mem *)&ram[mem2->next])->prev = ptr2; + } + + plug_holes(mem2); + } + sys_sem_signal(mem_sem); + return rmem; +} +void * +mem_malloc(mem_size_t size) +{ + mem_size_t ptr, ptr2; + struct mem *mem, *mem2; + + if (size == 0) { + return NULL; + } + + /* Expand the size of the allocated memory region so that we can + adjust for alignment. */ + if ((size % MEM_ALIGNMENT) != 0) { + size += MEM_ALIGNMENT - ((size + SIZEOF_STRUCT_MEM) % MEM_ALIGNMENT); + } + + if (size > MEM_SIZE) { + return NULL; + } + + sys_sem_wait(mem_sem); + + for (ptr = (u8_t *)lfree - ram; ptr < MEM_SIZE; ptr = ((struct mem *)&ram[ptr])->next) { + mem = (struct mem *)&ram[ptr]; + if (!mem->used && + mem->next - (ptr + SIZEOF_STRUCT_MEM) >= size + SIZEOF_STRUCT_MEM) { + ptr2 = ptr + SIZEOF_STRUCT_MEM + size; + mem2 = (struct mem *)&ram[ptr2]; + + mem2->prev = ptr; + mem2->next = mem->next; + mem->next = ptr2; + if (mem2->next != MEM_SIZE) { + ((struct mem *)&ram[mem2->next])->prev = ptr2; + } + + mem2->used = 0; + mem->used = 1; +#if MEM_STATS + lwip_stats.mem.used += (size + SIZEOF_STRUCT_MEM); + /* if (lwip_stats.mem.max < lwip_stats.mem.used) { + lwip_stats.mem.max = lwip_stats.mem.used; + } */ + if (lwip_stats.mem.max < ptr2) { + lwip_stats.mem.max = ptr2; + } +#endif /* MEM_STATS */ + + if (mem == lfree) { + /* Find next free block after mem */ + while (lfree->used && lfree != ram_end) { + lfree = (struct mem *)&ram[lfree->next]; + } + LWIP_ASSERT("mem_malloc: !lfree->used", !lfree->used); + } + sys_sem_signal(mem_sem); + LWIP_ASSERT("mem_malloc: allocated memory not above ram_end.", + (mem_ptr_t)mem + SIZEOF_STRUCT_MEM + size <= (mem_ptr_t)ram_end); + LWIP_ASSERT("mem_malloc: allocated memory properly aligned.", + (unsigned long)((u8_t *)mem + SIZEOF_STRUCT_MEM) % MEM_ALIGNMENT == 0); + return (u8_t *)mem + SIZEOF_STRUCT_MEM; + } + } + LWIP_DEBUGF(MEM_DEBUG | 2, ("mem_malloc: could not allocate %d bytes\n", (int)size)); +#if MEM_STATS + ++lwip_stats.mem.err; +#endif /* MEM_STATS */ + sys_sem_signal(mem_sem); + return NULL; +}
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/core/memp.c @@ -0,0 +1,274 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + +#include "lwip/opt.h" + +#include "lwip/memp.h" + +#include "lwip/pbuf.h" +#include "lwip/udp.h" +#include "lwip/raw.h" +#include "lwip/tcp.h" +#include "lwip/api.h" +#include "lwip/api_msg.h" +#include "lwip/tcpip.h" + +#include "lwip/sys.h" +#include "lwip/stats.h" + +struct memp { + struct memp *next; +}; + + + +static struct memp *memp_tab[MEMP_MAX]; + +static const u16_t memp_sizes[MEMP_MAX] = { + sizeof(struct pbuf), + sizeof(struct raw_pcb), + sizeof(struct udp_pcb), + sizeof(struct tcp_pcb), + sizeof(struct tcp_pcb_listen), + sizeof(struct tcp_seg), + sizeof(struct netbuf), + sizeof(struct netconn), + sizeof(struct api_msg), + sizeof(struct tcpip_msg), + sizeof(struct sys_timeout) +}; + +static const u16_t memp_num[MEMP_MAX] = { + MEMP_NUM_PBUF, + MEMP_NUM_RAW_PCB, + MEMP_NUM_UDP_PCB, + MEMP_NUM_TCP_PCB, + MEMP_NUM_TCP_PCB_LISTEN, + MEMP_NUM_TCP_SEG, + MEMP_NUM_NETBUF, + MEMP_NUM_NETCONN, + MEMP_NUM_API_MSG, + MEMP_NUM_TCPIP_MSG, + MEMP_NUM_SYS_TIMEOUT +}; + +static u8_t memp_memory[(MEMP_NUM_PBUF * + MEM_ALIGN_SIZE(sizeof(struct pbuf) + + sizeof(struct memp)) + + MEMP_NUM_RAW_PCB * + MEM_ALIGN_SIZE(sizeof(struct raw_pcb) + + sizeof(struct memp)) + + MEMP_NUM_UDP_PCB * + MEM_ALIGN_SIZE(sizeof(struct udp_pcb) + + sizeof(struct memp)) + + MEMP_NUM_TCP_PCB * + MEM_ALIGN_SIZE(sizeof(struct tcp_pcb) + + sizeof(struct memp)) + + MEMP_NUM_TCP_PCB_LISTEN * + MEM_ALIGN_SIZE(sizeof(struct tcp_pcb_listen) + + sizeof(struct memp)) + + MEMP_NUM_TCP_SEG * + MEM_ALIGN_SIZE(sizeof(struct tcp_seg) + + sizeof(struct memp)) + + MEMP_NUM_NETBUF * + MEM_ALIGN_SIZE(sizeof(struct netbuf) + + sizeof(struct memp)) + + MEMP_NUM_NETCONN * + MEM_ALIGN_SIZE(sizeof(struct netconn) + + sizeof(struct memp)) + + MEMP_NUM_API_MSG * + MEM_ALIGN_SIZE(sizeof(struct api_msg) + + sizeof(struct memp)) + + MEMP_NUM_TCPIP_MSG * + MEM_ALIGN_SIZE(sizeof(struct tcpip_msg) + + sizeof(struct memp)) + + MEMP_NUM_SYS_TIMEOUT * + MEM_ALIGN_SIZE(sizeof(struct sys_timeout) + + sizeof(struct memp)))]; + + +#if !SYS_LIGHTWEIGHT_PROT +static sys_sem_t mutex; +#endif + +#if MEMP_SANITY_CHECK +static int +memp_sanity(void) +{ + int i, c; + struct memp *m, *n; + + for(i = 0; i < MEMP_MAX; i++) { + for(m = memp_tab[i]; m != NULL; m = m->next) { + c = 1; + for(n = memp_tab[i]; n != NULL; n = n->next) { + if (n == m) { + --c; + } + if (c < 0) return 0; /* LW was: abort(); */ + } + } + } + return 1; +} +#endif /* MEMP_SANITY_CHECK*/ + +void +memp_init(void) +{ + struct memp *m, *memp; + u16_t i, j; + u16_t size; + +#if MEMP_STATS + for(i = 0; i < MEMP_MAX; ++i) { + lwip_stats.memp[i].used = lwip_stats.memp[i].max = + lwip_stats.memp[i].err = 0; + lwip_stats.memp[i].avail = memp_num[i]; + } +#endif /* MEMP_STATS */ + + memp = (struct memp *)&memp_memory[0]; + for(i = 0; i < MEMP_MAX; ++i) { + size = MEM_ALIGN_SIZE(memp_sizes[i] + sizeof(struct memp)); + if (memp_num[i] > 0) { + memp_tab[i] = memp; + m = memp; + + for(j = 0; j < memp_num[i]; ++j) { + m->next = (struct memp *)MEM_ALIGN((u8_t *)m + size); + memp = m; + m = m->next; + } + memp->next = NULL; + memp = m; + } else { + memp_tab[i] = NULL; + } + } + +#if !SYS_LIGHTWEIGHT_PROT + mutex = sys_sem_new(1); +#endif + + +} + +void * +memp_malloc(memp_t type) +{ + struct memp *memp; + void *mem; +#if SYS_LIGHTWEIGHT_PROT + SYS_ARCH_DECL_PROTECT(old_level); +#endif + + LWIP_ASSERT("memp_malloc: type < MEMP_MAX", type < MEMP_MAX); + +#if SYS_LIGHTWEIGHT_PROT + SYS_ARCH_PROTECT(old_level); +#else /* SYS_LIGHTWEIGHT_PROT */ + sys_sem_wait(mutex); +#endif /* SYS_LIGHTWEIGHT_PROT */ + + memp = memp_tab[type]; + + if (memp != NULL) { + memp_tab[type] = memp->next; + memp->next = NULL; +#if MEMP_STATS + ++lwip_stats.memp[type].used; + if (lwip_stats.memp[type].used > lwip_stats.memp[type].max) { + lwip_stats.memp[type].max = lwip_stats.memp[type].used; + } +#endif /* MEMP_STATS */ +#if SYS_LIGHTWEIGHT_PROT + SYS_ARCH_UNPROTECT(old_level); +#else /* SYS_LIGHTWEIGHT_PROT */ + sys_sem_signal(mutex); +#endif /* SYS_LIGHTWEIGHT_PROT */ + LWIP_ASSERT("memp_malloc: memp properly aligned", + ((mem_ptr_t)MEM_ALIGN((u8_t *)memp + sizeof(struct memp)) % MEM_ALIGNMENT) == 0); + + mem = MEM_ALIGN((u8_t *)memp + sizeof(struct memp)); + return mem; + } else { + LWIP_DEBUGF(MEMP_DEBUG | 2, ("memp_malloc: out of memory in pool %d\n", type)); +#if MEMP_STATS + ++lwip_stats.memp[type].err; +#endif /* MEMP_STATS */ +#if SYS_LIGHTWEIGHT_PROT + SYS_ARCH_UNPROTECT(old_level); +#else /* SYS_LIGHTWEIGHT_PROT */ + sys_sem_signal(mutex); +#endif /* SYS_LIGHTWEIGHT_PROT */ + return NULL; + } +} + +void +memp_free(memp_t type, void *mem) +{ + struct memp *memp; +#if SYS_LIGHTWEIGHT_PROT + SYS_ARCH_DECL_PROTECT(old_level); +#endif /* SYS_LIGHTWEIGHT_PROT */ + + if (mem == NULL) { + return; + } + memp = (struct memp *)((u8_t *)mem - sizeof(struct memp)); + +#if SYS_LIGHTWEIGHT_PROT + SYS_ARCH_PROTECT(old_level); +#else /* SYS_LIGHTWEIGHT_PROT */ + sys_sem_wait(mutex); +#endif /* SYS_LIGHTWEIGHT_PROT */ + +#if MEMP_STATS + lwip_stats.memp[type].used--; +#endif /* MEMP_STATS */ + + memp->next = memp_tab[type]; + memp_tab[type] = memp; + +#if MEMP_SANITY_CHECK + LWIP_ASSERT("memp sanity", memp_sanity()); +#endif + +#if SYS_LIGHTWEIGHT_PROT + SYS_ARCH_UNPROTECT(old_level); +#else /* SYS_LIGHTWEIGHT_PROT */ + sys_sem_signal(mutex); +#endif /* SYS_LIGHTWEIGHT_PROT */ +} +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/core/netif.c @@ -0,0 +1,246 @@ +/** + * @file + * + * lwIP network interface abstraction + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + +#include "lwip/opt.h" + +#include "lwip/def.h" +#include "lwip/ip_addr.h" +#include "lwip/netif.h" +#include "lwip/tcp.h" + +struct netif *netif_list = NULL; +struct netif *netif_default = NULL; + +/** + * Add a network interface to the list of lwIP netifs. + * + * @param netif a pre-allocated netif structure + * @param ipaddr IP address for the new netif + * @param netmask network mask for the new netif + * @param gw default gateway IP address for the new netif + * @param state opaque data passed to the new netif + * @param init callback function that initializes the interface + * @param input callback function that is called to pass + * ingress packets up in the protocol layer stack. + * + * @return netif, or NULL if failed. + */ +struct netif * +netif_add(struct netif *netif, struct ip_addr *ipaddr, struct ip_addr *netmask, + struct ip_addr *gw, + void *state, + err_t (* init)(struct netif *netif), + err_t (* input)(struct pbuf *p, struct netif *netif)) +{ + static int netifnum = 0; + + +#if LWIP_DHCP + /* netif not under DHCP control by default */ + netif->dhcp = NULL; +#endif + /* remember netif specific state information data */ + netif->state = state; + netif->num = netifnum++; + netif->input = input; + + netif_set_addr(netif, ipaddr, netmask, gw); + + /* call user specified initialization function for netif */ + if (init(netif) != ERR_OK) { + return NULL; + } + + /* add this netif to the list */ + netif->next = netif_list; + netif_list = netif; + LWIP_DEBUGF(NETIF_DEBUG, ("netif: added interface %c%c IP addr ", + netif->name[0], netif->name[1])); + ip_addr_debug_print(NETIF_DEBUG, ipaddr); + LWIP_DEBUGF(NETIF_DEBUG, (" netmask ")); + ip_addr_debug_print(NETIF_DEBUG, netmask); + LWIP_DEBUGF(NETIF_DEBUG, (" gw ")); + ip_addr_debug_print(NETIF_DEBUG, gw); + LWIP_DEBUGF(NETIF_DEBUG, ("\n")); + return netif; +} + +void +netif_set_addr(struct netif *netif,struct ip_addr *ipaddr, struct ip_addr *netmask, + struct ip_addr *gw) +{ + netif_set_ipaddr(netif, ipaddr); + netif_set_netmask(netif, netmask); + netif_set_gw(netif, gw); +} + +void netif_remove(struct netif * netif) +{ + if ( netif == NULL ) return; + + /* is it the first netif? */ + if (netif_list == netif) { + netif_list = netif->next; + } + else { + /* look for netif further down the list */ + struct netif * tmpNetif; + for (tmpNetif = netif_list; tmpNetif != NULL; tmpNetif = tmpNetif->next) { + if (tmpNetif->next == netif) { + tmpNetif->next = netif->next; + break; + } + } + if (tmpNetif == NULL) + return; /* we didn't find any netif today */ + } + /* this netif is default? */ + if (netif_default == netif) + /* reset default netif */ + netif_default = NULL; + LWIP_DEBUGF( NETIF_DEBUG, ("netif_remove: removed netif\n") ); +} + +struct netif * +netif_find(char *name) +{ + struct netif *netif; + u8_t num; + + if (name == NULL) { + return NULL; + } + + num = name[2] - '0'; + + for(netif = netif_list; netif != NULL; netif = netif->next) { + if (num == netif->num && + name[0] == netif->name[0] && + name[1] == netif->name[1]) { + LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: found %c%c\n", name[0], name[1])); + return netif; + } + } + LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: didn't find %c%c\n", name[0], name[1])); + return NULL; +} + +void +netif_set_ipaddr(struct netif *netif, struct ip_addr *ipaddr) +{ + /* TODO: Handling of obsolete pcbs */ + /* See: http://mail.gnu.org/archive/html/lwip-users/2003-03/msg00118.html */ +#if LWIP_TCP + struct tcp_pcb *pcb; + struct tcp_pcb_listen *lpcb; + + /* address is actually being changed? */ + if ((ip_addr_cmp(ipaddr, &(netif->ip_addr))) == 0) + { + /* extern struct tcp_pcb *tcp_active_pcbs; defined by tcp.h */ + LWIP_DEBUGF(NETIF_DEBUG | 1, ("netif_set_ipaddr: netif address being changed\n")); + pcb = tcp_active_pcbs; + while (pcb != NULL) { + /* PCB bound to current local interface address? */ + if (ip_addr_cmp(&(pcb->local_ip), &(netif->ip_addr))) { + /* this connection must be aborted */ + struct tcp_pcb *next = pcb->next; + LWIP_DEBUGF(NETIF_DEBUG | 1, ("netif_set_ipaddr: aborting TCP pcb %p\n", (void *)pcb)); + tcp_abort(pcb); + pcb = next; + } else { + pcb = pcb->next; + } + } + for (lpcb = tcp_listen_pcbs.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) { + /* PCB bound to current local interface address? */ + if (ip_addr_cmp(&(lpcb->local_ip), &(netif->ip_addr))) { + /* The PCB is listening to the old ipaddr and + * is set to listen to the new one instead */ + ip_addr_set(&(lpcb->local_ip), ipaddr); + } + } + } +#endif + ip_addr_set(&(netif->ip_addr), ipaddr); + LWIP_DEBUGF(NETIF_DEBUG | DBG_TRACE | DBG_STATE | 3, ("netif: IP address of interface %c%c set to %u.%u.%u.%u\n", + netif->name[0], netif->name[1], + (unsigned int)(ntohl(netif->ip_addr.addr) >> 24 & 0xff), + (unsigned int)(ntohl(netif->ip_addr.addr) >> 16 & 0xff), + (unsigned int)(ntohl(netif->ip_addr.addr) >> 8 & 0xff), + (unsigned int)(ntohl(netif->ip_addr.addr) & 0xff))); +} + +void +netif_set_gw(struct netif *netif, struct ip_addr *gw) +{ + ip_addr_set(&(netif->gw), gw); + LWIP_DEBUGF(NETIF_DEBUG | DBG_TRACE | DBG_STATE | 3, ("netif: GW address of interface %c%c set to %u.%u.%u.%u\n", + netif->name[0], netif->name[1], + (unsigned int)(ntohl(netif->gw.addr) >> 24 & 0xff), + (unsigned int)(ntohl(netif->gw.addr) >> 16 & 0xff), + (unsigned int)(ntohl(netif->gw.addr) >> 8 & 0xff), + (unsigned int)(ntohl(netif->gw.addr) & 0xff))); +} + +void +netif_set_netmask(struct netif *netif, struct ip_addr *netmask) +{ + ip_addr_set(&(netif->netmask), netmask); + LWIP_DEBUGF(NETIF_DEBUG | DBG_TRACE | DBG_STATE | 3, ("netif: netmask of interface %c%c set to %u.%u.%u.%u\n", + netif->name[0], netif->name[1], + (unsigned int)(ntohl(netif->netmask.addr) >> 24 & 0xff), + (unsigned int)(ntohl(netif->netmask.addr) >> 16 & 0xff), + (unsigned int)(ntohl(netif->netmask.addr) >> 8 & 0xff), + (unsigned int)(ntohl(netif->netmask.addr) & 0xff))); +} + +void +netif_set_default(struct netif *netif) +{ + netif_default = netif; + LWIP_DEBUGF(NETIF_DEBUG, ("netif: setting default interface %c%c\n", + netif ? netif->name[0] : '\'', netif ? netif->name[1] : '\'')); +} + +void +netif_init(void) +{ + netif_list = netif_default = NULL; +} +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/core/pbuf.c @@ -0,0 +1,927 @@ +/** + * @file + * Packet buffer management + * + * Packets are built from the pbuf data structure. It supports dynamic + * memory allocation for packet contents or can reference externally + * managed packet contents both in RAM and ROM. Quick allocation for + * incoming packets is provided through pools with fixed sized pbufs. + * + * A packet may span over multiple pbufs, chained as a singly linked + * list. This is called a "pbuf chain". + * + * Multiple packets may be queued, also using this singly linked list. + * This is called a "packet queue". + * + * So, a packet queue consists of one or more pbuf chains, each of + * which consist of one or more pbufs. Currently, queues are only + * supported in a limited section of lwIP, this is the etharp queueing + * code. Outside of this section no packet queues are supported yet. + * + * The differences between a pbuf chain and a packet queue are very + * precise but subtle. + * + * The last pbuf of a packet has a ->tot_len field that equals the + * ->len field. It can be found by traversing the list. If the last + * pbuf of a packet has a ->next field other than NULL, more packets + * are on the queue. + * + * Therefore, looping through a pbuf of a single packet, has an + * loop end condition (tot_len == p->len), NOT (next == NULL). + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + +#include "lwip/opt.h" + +#include "lwip/stats.h" + +#include "lwip/def.h" +#include "lwip/mem.h" +#include "lwip/memp.h" +#include "lwip/pbuf.h" + +#include "lwip/sys.h" + +#include "arch/perf.h" + +static u8_t pbuf_pool_memory[(PBUF_POOL_SIZE * MEM_ALIGN_SIZE(PBUF_POOL_BUFSIZE + sizeof(struct pbuf)))]; + +#if !SYS_LIGHTWEIGHT_PROT +static volatile u8_t pbuf_pool_free_lock, pbuf_pool_alloc_lock; +static sys_sem_t pbuf_pool_free_sem; +#endif + +static struct pbuf *pbuf_pool = NULL; + +/** + * Initializes the pbuf module. + * + * A large part of memory is allocated for holding the pool of pbufs. + * The size of the individual pbufs in the pool is given by the size + * parameter, and the number of pbufs in the pool by the num parameter. + * + * After the memory has been allocated, the pbufs are set up. The + * ->next pointer in each pbuf is set up to point to the next pbuf in + * the pool. + * + */ +void +pbuf_init(void) +{ + struct pbuf *p, *q = NULL; + u16_t i; + + pbuf_pool = (struct pbuf *)&pbuf_pool_memory[0]; + LWIP_ASSERT("pbuf_init: pool aligned", (mem_ptr_t)pbuf_pool % MEM_ALIGNMENT == 0); + +#if PBUF_STATS + lwip_stats.pbuf.avail = PBUF_POOL_SIZE; +#endif /* PBUF_STATS */ + + /* Set up ->next pointers to link the pbufs of the pool together */ + p = pbuf_pool; + + for(i = 0; i < PBUF_POOL_SIZE; ++i) { + p->next = (struct pbuf *)((u8_t *)p + PBUF_POOL_BUFSIZE + sizeof(struct pbuf)); + p->len = p->tot_len = PBUF_POOL_BUFSIZE; + p->payload = MEM_ALIGN((void *)((u8_t *)p + sizeof(struct pbuf))); + p->flags = PBUF_FLAG_POOL; + q = p; + p = p->next; + } + + /* The ->next pointer of last pbuf is NULL to indicate that there + are no more pbufs in the pool */ + q->next = NULL; + +#if !SYS_LIGHTWEIGHT_PROT + pbuf_pool_alloc_lock = 0; + pbuf_pool_free_lock = 0; + pbuf_pool_free_sem = sys_sem_new(1); +#endif +} + +/** + * @internal only called from pbuf_alloc() + */ +static struct pbuf * +pbuf_pool_alloc(void) +{ + struct pbuf *p = NULL; + + SYS_ARCH_DECL_PROTECT(old_level); + SYS_ARCH_PROTECT(old_level); + +#if !SYS_LIGHTWEIGHT_PROT + /* Next, check the actual pbuf pool, but if the pool is locked, we + pretend to be out of buffers and return NULL. */ + if (pbuf_pool_free_lock) { +#if PBUF_STATS + ++lwip_stats.pbuf.alloc_locked; +#endif /* PBUF_STATS */ + return NULL; + } + pbuf_pool_alloc_lock = 1; + if (!pbuf_pool_free_lock) { +#endif /* SYS_LIGHTWEIGHT_PROT */ + p = pbuf_pool; + if (p) { + pbuf_pool = p->next; + } +#if !SYS_LIGHTWEIGHT_PROT +#if PBUF_STATS + } else { + ++lwip_stats.pbuf.alloc_locked; +#endif /* PBUF_STATS */ + } + pbuf_pool_alloc_lock = 0; +#endif /* SYS_LIGHTWEIGHT_PROT */ + +#if PBUF_STATS + if (p != NULL) { + ++lwip_stats.pbuf.used; + if (lwip_stats.pbuf.used > lwip_stats.pbuf.max) { + lwip_stats.pbuf.max = lwip_stats.pbuf.used; + } + } +#endif /* PBUF_STATS */ + + SYS_ARCH_UNPROTECT(old_level); + return p; +} + + +/** + * Allocates a pbuf. + * + * The actual memory allocated for the pbuf is determined by the + * layer at which the pbuf is allocated and the requested size + * (from the size parameter). + * + * @param flag this parameter decides how and where the pbuf + * should be allocated as follows: + * + * - PBUF_RAM: buffer memory for pbuf is allocated as one large + * chunk. This includes protocol headers as well. + * - PBUF_ROM: no buffer memory is allocated for the pbuf, even for + * protocol headers. Additional headers must be prepended + * by allocating another pbuf and chain in to the front of + * the ROM pbuf. It is assumed that the memory used is really + * similar to ROM in that it is immutable and will not be + * changed. Memory which is dynamic should generally not + * be attached to PBUF_ROM pbufs. Use PBUF_REF instead. + * - PBUF_REF: no buffer memory is allocated for the pbuf, even for + * protocol headers. It is assumed that the pbuf is only + * being used in a single thread. If the pbuf gets queued, + * then pbuf_take should be called to copy the buffer. + * - PBUF_POOL: the pbuf is allocated as a pbuf chain, with pbufs from + * the pbuf pool that is allocated during pbuf_init(). + * + * @return the allocated pbuf. If multiple pbufs where allocated, this + * is the first pbuf of a pbuf chain. + */ +struct pbuf * +pbuf_alloc(pbuf_layer l, u16_t length, pbuf_flag flag) +{ + struct pbuf *p, *q, *r; + u16_t offset; + s32_t rem_len; /* remaining length */ + LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE | 3, ("pbuf_alloc(length=%u)\n", length)); + + /* determine header offset */ + offset = 0; + switch (l) { + case PBUF_TRANSPORT: + /* add room for transport (often TCP) layer header */ + offset += PBUF_TRANSPORT_HLEN; + /* FALLTHROUGH */ + case PBUF_IP: + /* add room for IP layer header */ + offset += PBUF_IP_HLEN; + /* FALLTHROUGH */ + case PBUF_LINK: + /* add room for link layer header */ + offset += PBUF_LINK_HLEN; + break; + case PBUF_RAW: + break; + default: + LWIP_ASSERT("pbuf_alloc: bad pbuf layer", 0); + return NULL; + } + + switch (flag) { + case PBUF_POOL: + /* allocate head of pbuf chain into p */ + p = pbuf_pool_alloc(); + LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE | 3, ("pbuf_alloc: allocated pbuf %p\n", (void *)p)); + if (p == NULL) { +#if PBUF_STATS + ++lwip_stats.pbuf.err; +#endif /* PBUF_STATS */ + return NULL; + } + p->next = NULL; + + /* make the payload pointer point 'offset' bytes into pbuf data memory */ + p->payload = MEM_ALIGN((void *)((u8_t *)p + (sizeof(struct pbuf) + offset))); + LWIP_ASSERT("pbuf_alloc: pbuf p->payload properly aligned", + ((mem_ptr_t)p->payload % MEM_ALIGNMENT) == 0); + /* the total length of the pbuf chain is the requested size */ + p->tot_len = length; + /* set the length of the first pbuf in the chain */ + p->len = length > PBUF_POOL_BUFSIZE - offset? PBUF_POOL_BUFSIZE - offset: length; + /* set reference count (needed here in case we fail) */ + p->ref = 1; + + /* now allocate the tail of the pbuf chain */ + + /* remember first pbuf for linkage in next iteration */ + r = p; + /* remaining length to be allocated */ + rem_len = length - p->len; + /* any remaining pbufs to be allocated? */ + while (rem_len > 0) { + q = pbuf_pool_alloc(); + if (q == NULL) { + LWIP_DEBUGF(PBUF_DEBUG | 2, ("pbuf_alloc: Out of pbufs in pool.\n")); +#if PBUF_STATS + ++lwip_stats.pbuf.err; +#endif /* PBUF_STATS */ + /* free chain so far allocated */ + pbuf_free(p); + /* bail out unsuccesfully */ + return NULL; + } + q->next = NULL; + /* make previous pbuf point to this pbuf */ + r->next = q; + /* set total length of this pbuf and next in chain */ + q->tot_len = rem_len; + /* this pbuf length is pool size, unless smaller sized tail */ + q->len = rem_len > PBUF_POOL_BUFSIZE? PBUF_POOL_BUFSIZE: rem_len; + q->payload = (void *)((u8_t *)q + sizeof(struct pbuf)); + LWIP_ASSERT("pbuf_alloc: pbuf q->payload properly aligned", + ((mem_ptr_t)q->payload % MEM_ALIGNMENT) == 0); + q->ref = 1; + /* calculate remaining length to be allocated */ + rem_len -= q->len; + /* remember this pbuf for linkage in next iteration */ + r = q; + } + /* end of chain */ + /*r->next = NULL;*/ + + break; + case PBUF_RAM: + /* If pbuf is to be allocated in RAM, allocate memory for it. */ + p = mem_malloc(MEM_ALIGN_SIZE(sizeof(struct pbuf) + length + offset)); + if (p == NULL) { + return NULL; + } + /* Set up internal structure of the pbuf. */ + p->payload = MEM_ALIGN((void *)((u8_t *)p + sizeof(struct pbuf) + offset)); + p->len = p->tot_len = length; + p->next = NULL; + p->flags = PBUF_FLAG_RAM; + + LWIP_ASSERT("pbuf_alloc: pbuf->payload properly aligned", + ((mem_ptr_t)p->payload % MEM_ALIGNMENT) == 0); + break; + /* pbuf references existing (static constant) ROM payload? */ + case PBUF_ROM: + /* pbuf references existing (externally allocated) RAM payload? */ + case PBUF_REF: + /* only allocate memory for the pbuf structure */ + p = memp_malloc(MEMP_PBUF); + if (p == NULL) { + LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE | 2, ("pbuf_alloc: Could not allocate MEMP_PBUF for PBUF_%s.\n", flag == PBUF_ROM?"ROM":"REF")); + return NULL; + } + /* caller must set this field properly, afterwards */ + p->payload = NULL; + p->len = p->tot_len = length; + p->next = NULL; + p->flags = (flag == PBUF_ROM? PBUF_FLAG_ROM: PBUF_FLAG_REF); + break; + default: + LWIP_ASSERT("pbuf_alloc: erroneous flag", 0); + return NULL; + } + /* set reference count */ + p->ref = 1; + LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE | 3, ("pbuf_alloc(length=%u) == %p\n", length, (void *)p)); + return p; +} + + +#if PBUF_STATS +#define DEC_PBUF_STATS do { --lwip_stats.pbuf.used; } while (0) +#else /* PBUF_STATS */ +#define DEC_PBUF_STATS +#endif /* PBUF_STATS */ + +#define PBUF_POOL_FAST_FREE(p) do { \ + p->next = pbuf_pool; \ + pbuf_pool = p; \ + DEC_PBUF_STATS; \ + } while (0) + +#if SYS_LIGHTWEIGHT_PROT +#define PBUF_POOL_FREE(p) do { \ + SYS_ARCH_DECL_PROTECT(old_level); \ + SYS_ARCH_PROTECT(old_level); \ + PBUF_POOL_FAST_FREE(p); \ + SYS_ARCH_UNPROTECT(old_level); \ + } while (0) +#else /* SYS_LIGHTWEIGHT_PROT */ +#define PBUF_POOL_FREE(p) do { \ + sys_sem_wait(pbuf_pool_free_sem); \ + PBUF_POOL_FAST_FREE(p); \ + sys_sem_signal(pbuf_pool_free_sem); \ + } while (0) +#endif /* SYS_LIGHTWEIGHT_PROT */ + +/** + * Shrink a pbuf chain to a desired length. + * + * @param p pbuf to shrink. + * @param new_len desired new length of pbuf chain + * + * Depending on the desired length, the first few pbufs in a chain might + * be skipped and left unchanged. The new last pbuf in the chain will be + * resized, and any remaining pbufs will be freed. + * + * @note If the pbuf is ROM/REF, only the ->tot_len and ->len fields are adjusted. + * @note May not be called on a packet queue. + * + * @bug Cannot grow the size of a pbuf (chain) (yet). + */ +void +pbuf_realloc(struct pbuf *p, u16_t new_len) +{ + struct pbuf *q; + u16_t rem_len; /* remaining length */ + s16_t grow; + + LWIP_ASSERT("pbuf_realloc: sane p->flags", p->flags == PBUF_FLAG_POOL || + p->flags == PBUF_FLAG_ROM || + p->flags == PBUF_FLAG_RAM || + p->flags == PBUF_FLAG_REF); + + /* desired length larger than current length? */ + if (new_len >= p->tot_len) { + /* enlarging not yet supported */ + return; + } + + /* the pbuf chain grows by (new_len - p->tot_len) bytes + * (which may be negative in case of shrinking) */ + grow = new_len - p->tot_len; + + /* first, step over any pbufs that should remain in the chain */ + rem_len = new_len; + q = p; + /* should this pbuf be kept? */ + while (rem_len > q->len) { + /* decrease remaining length by pbuf length */ + rem_len -= q->len; + /* decrease total length indicator */ + q->tot_len += grow; + /* proceed to next pbuf in chain */ + q = q->next; + } + /* we have now reached the new last pbuf (in q) */ + /* rem_len == desired length for pbuf q */ + + /* shrink allocated memory for PBUF_RAM */ + /* (other types merely adjust their length fields */ + if ((q->flags == PBUF_FLAG_RAM) && (rem_len != q->len)) { + /* reallocate and adjust the length of the pbuf that will be split */ + mem_realloc(q, (u8_t *)q->payload - (u8_t *)q + rem_len); + } + /* adjust length fields for new last pbuf */ + q->len = rem_len; + q->tot_len = q->len; + + /* any remaining pbufs in chain? */ + if (q->next != NULL) { + /* free remaining pbufs in chain */ + pbuf_free(q->next); + } + /* q is last packet in chain */ + q->next = NULL; + +} + +/** + * Adjusts the payload pointer to hide or reveal headers in the payload. + * + * Adjusts the ->payload pointer so that space for a header + * (dis)appears in the pbuf payload. + * + * The ->payload, ->tot_len and ->len fields are adjusted. + * + * @param hdr_size Number of bytes to increment header size which + * increases the size of the pbuf. New space is on the front. + * (Using a negative value decreases the header size.) + * + * PBUF_ROM and PBUF_REF type buffers cannot have their sizes increased, so + * the call will fail. A check is made that the increase in header size does + * not move the payload pointer in front of the start of the buffer. + * @return 1 on failure, 0 on success. + * + * @note May not be called on a packet queue. + */ +u8_t +pbuf_header(struct pbuf *p, s16_t header_size) +{ + void *payload; + + /* remember current payload pointer */ + payload = p->payload; + + /* pbuf types containing payloads? */ + if (p->flags == PBUF_FLAG_RAM || p->flags == PBUF_FLAG_POOL) { + /* set new payload pointer */ + p->payload = (u8_t *)p->payload - header_size; + /* boundary check fails? */ + if ((u8_t *)p->payload < (u8_t *)p + sizeof(struct pbuf)) { + LWIP_DEBUGF( PBUF_DEBUG | 2, ("pbuf_header: failed as %p < %p\n", + (u8_t *)p->payload, + (u8_t *)p + sizeof(struct pbuf)) );\ + /* restore old payload pointer */ + p->payload = payload; + /* bail out unsuccesfully */ + return 1; + } + /* pbuf types refering to payloads? */ + } else if (p->flags == PBUF_FLAG_REF || p->flags == PBUF_FLAG_ROM) { + /* hide a header in the payload? */ + if ((header_size < 0) && (header_size - p->len <= 0)) { + /* increase payload pointer */ + p->payload = (u8_t *)p->payload - header_size; + } else { + /* cannot expand payload to front (yet!) + * bail out unsuccesfully */ + return 1; + } + } + LWIP_DEBUGF( PBUF_DEBUG, ("pbuf_header: old %p new %p (%d)\n", (void *)payload, (void *)p->payload, header_size) ); + /* modify pbuf length fields */ + p->len += header_size; + p->tot_len += header_size; + + return 0; +} + +/** + * Dereference a pbuf chain or queue and deallocate any no-longer-used + * pbufs at the head of this chain or queue. + * + * Decrements the pbuf reference count. If it reaches + * zero, the pbuf is deallocated. + * + * For a pbuf chain, this is repeated for each pbuf in the chain, + * up to the first pbuf which has a non-zero reference count after + * decrementing. (This might de-allocate the whole chain.) + * + * @param pbuf The pbuf (chain) to be dereferenced. + * + * @return the number of pbufs that were de-allocated + * from the head of the chain. + * + * @note MUST NOT be called on a packet queue. + * @note the reference counter of a pbuf equals the number of pointers + * that refer to the pbuf (or into the pbuf). + * + * @internal examples: + * + * Assuming existing chains a->b->c with the following reference + * counts, calling pbuf_free(a) results in: + * + * 1->2->3 becomes ...1->3 + * 3->3->3 becomes 2->3->3 + * 1->1->2 becomes ......1 + * 2->1->1 becomes 1->1->1 + * 1->1->1 becomes ....... + * + */ +u8_t +pbuf_free(struct pbuf *p) +{ + struct pbuf *q; + u8_t count; + SYS_ARCH_DECL_PROTECT(old_level); + + LWIP_ASSERT("p != NULL", p != NULL); + /* if assertions are disabled, proceed with debug output */ + if (p == NULL) { + LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE | 2, ("pbuf_free(p == NULL) was called.\n")); + return 0; + } + LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE | 3, ("pbuf_free(%p)\n", (void *)p)); + + PERF_START; + + LWIP_ASSERT("pbuf_free: sane flags", + p->flags == PBUF_FLAG_RAM || p->flags == PBUF_FLAG_ROM || + p->flags == PBUF_FLAG_REF || p->flags == PBUF_FLAG_POOL); + + count = 0; + /* Since decrementing ref cannot be guaranteed to be a single machine operation + * we must protect it. Also, the later test of ref must be protected. + */ + SYS_ARCH_PROTECT(old_level); + /* de-allocate all consecutive pbufs from the head of the chain that + * obtain a zero reference count after decrementing*/ + while (p != NULL) { + /* all pbufs in a chain are referenced at least once */ + LWIP_ASSERT("pbuf_free: p->ref > 0", p->ref > 0); + /* decrease reference count (number of pointers to pbuf) */ + p->ref--; + /* this pbuf is no longer referenced to? */ + if (p->ref == 0) { + /* remember next pbuf in chain for next iteration */ + q = p->next; + LWIP_DEBUGF( PBUF_DEBUG | 2, ("pbuf_free: deallocating %p\n", (void *)p)); + /* is this a pbuf from the pool? */ + if (p->flags == PBUF_FLAG_POOL) { + p->len = p->tot_len = PBUF_POOL_BUFSIZE; + p->payload = (void *)((u8_t *)p + sizeof(struct pbuf)); + PBUF_POOL_FREE(p); + /* a ROM or RAM referencing pbuf */ + } else if (p->flags == PBUF_FLAG_ROM || p->flags == PBUF_FLAG_REF) { + memp_free(MEMP_PBUF, p); + /* p->flags == PBUF_FLAG_RAM */ + } else { + mem_free(p); + } + count++; + /* proceed to next pbuf */ + p = q; + /* p->ref > 0, this pbuf is still referenced to */ + /* (and so the remaining pbufs in chain as well) */ + } else { + LWIP_DEBUGF( PBUF_DEBUG | 2, ("pbuf_free: %p has ref %u, ending here.\n", (void *)p, (unsigned int)p->ref)); + /* stop walking through chain */ + p = NULL; + } + } + SYS_ARCH_UNPROTECT(old_level); + PERF_STOP("pbuf_free"); + /* return number of de-allocated pbufs */ + return count; +} + +/** + * Count number of pbufs in a chain + * + * @param p first pbuf of chain + * @return the number of pbufs in a chain + */ + +u8_t +pbuf_clen(struct pbuf *p) +{ + u8_t len; + + len = 0; + while (p != NULL) { + ++len; + p = p->next; + } + return len; +} + +/** + * Increment the reference count of the pbuf. + * + * @param p pbuf to increase reference counter of + * + */ +void +pbuf_ref(struct pbuf *p) +{ + SYS_ARCH_DECL_PROTECT(old_level); + /* pbuf given? */ + if (p != NULL) { + SYS_ARCH_PROTECT(old_level); + ++(p->ref); + SYS_ARCH_UNPROTECT(old_level); + } +} + +/** + * Concatenate two pbufs (each may be a pbuf chain) and take over + * the caller's reference of the tail pbuf. + * + * @note The caller MAY NOT reference the tail pbuf afterwards. + * Use pbuf_chain() for that purpose. + * + * @see pbuf_chain() + */ + +void +pbuf_cat(struct pbuf *h, struct pbuf *t) +{ + struct pbuf *p; + + LWIP_ASSERT("h != NULL", h != NULL); + LWIP_ASSERT("t != NULL", t != NULL); + if ((h == NULL) || (t == NULL)) return; + + /* proceed to last pbuf of chain */ + for (p = h; p->next != NULL; p = p->next) { + /* add total length of second chain to all totals of first chain */ + p->tot_len += t->tot_len; + } + /* { p is last pbuf of first h chain, p->next == NULL } */ + LWIP_ASSERT("p->tot_len == p->len (of last pbuf in chain)", p->tot_len == p->len); + /* add total length of second chain to last pbuf total of first chain */ + p->tot_len += t->tot_len; + /* chain last pbuf of head (p) with first of tail (t) */ + p->next = t; +} + +/** + * Chain two pbufs (or pbuf chains) together. + * + * The caller MUST call pbuf_free(t) once it has stopped + * using it. Use pbuf_cat() instead if you no longer use t. + * + * @param h head pbuf (chain) + * @param t tail pbuf (chain) + * @note The pbufs MUST belong to the same packet. + * @note MAY NOT be called on a packet queue. + * + * The ->tot_len fields of all pbufs of the head chain are adjusted. + * The ->next field of the last pbuf of the head chain is adjusted. + * The ->ref field of the first pbuf of the tail chain is adjusted. + * + */ +void +pbuf_chain(struct pbuf *h, struct pbuf *t) +{ + pbuf_cat(h, t); + /* t is now referenced by h */ + pbuf_ref(t); + LWIP_DEBUGF(PBUF_DEBUG | DBG_FRESH | 2, ("pbuf_chain: %p references %p\n", (void *)h, (void *)t)); +} + +/* For packet queueing. Note that queued packets must be dequeued first + * before calling any pbuf functions. */ +#if ARP_QUEUEING +/** + * Add a packet to the end of a queue. + * + * @param q pointer to first packet on the queue + * @param n packet to be queued + * + */ +void +pbuf_queue(struct pbuf *p, struct pbuf *n) +{ + LWIP_ASSERT("p != NULL", p != NULL); + LWIP_ASSERT("n != NULL", n != NULL); + if ((p == NULL) || (n == NULL)) return; + + /* iterate through all packets on queue */ + while (p->next != NULL) { +/* be very picky about pbuf chain correctness */ +#if PBUF_DEBUG + /* iterate through all pbufs in packet */ + while (p->tot_len != p->len) { + /* make sure invariant condition holds */ + LWIP_ASSERT("p->len < p->tot_len", p->len < p->tot_len); + /* make sure each packet is complete */ + LWIP_ASSERT("p->next != NULL", p->next != NULL); + p = p->next; + /* { p->tot_len == p->len } => p is last pbuf of a packet */ + } +#endif + /* { p->tot_len == p->len } => p is last pbuf of a packet */ + /* proceed to next packet on queue */ + if (p->next != NULL) p = p->next; + } + /* { p->tot_len == p->len and p->next == NULL } ==> + * { p is last pbuf of last packet on queue } */ + /* chain last pbuf of queue with n */ + p->next = n; + /* n is now referenced to one more time */ + pbuf_ref(n); + LWIP_DEBUGF(PBUF_DEBUG | DBG_FRESH | 2, ("pbuf_queue: referencing queued packet %p\n", (void *)n)); +} + +/** + * Remove a packet from the head of a queue. + * + * The caller MUST reference the remainder of the queue (as returned). + * + * @param p pointer to first packet on the queue which will be dequeued. + * @return first packet on the remaining queue (NULL if no further packets). + * + */ +struct pbuf * +pbuf_dequeue(struct pbuf *p) +{ + struct pbuf *q; + LWIP_ASSERT("p != NULL", p != NULL); + + /* iterate through all pbufs in packet */ + while (p->tot_len != p->len) { + /* make sure invariant condition holds */ + LWIP_ASSERT("p->len < p->tot_len", p->len < p->tot_len); + /* make sure each packet is complete */ + LWIP_ASSERT("p->next != NULL", p->next != NULL); + p = p->next; + } + /* { p->tot_len == p->len } => p is the last pbuf of the first packet */ + /* remember next packet on queue */ + q = p->next; + /* dequeue p from queue */ + p->next = NULL; + /* any next packet on queue? */ + if (q != NULL) { + /* although q is no longer referenced by p, it MUST be referenced by + * the caller, who is maintaining this packet queue */ + LWIP_DEBUGF(PBUF_DEBUG | DBG_FRESH | 2, ("pbuf_dequeue: at least one packet on queue, first %p\n", (void *)q)); + } else { + LWIP_DEBUGF(PBUF_DEBUG | DBG_FRESH | 2, ("pbuf_dequeue: no further packets on queue\n")); + } + return q; +} +#endif + +/** + * + * Create PBUF_POOL (or PBUF_RAM) copies of PBUF_REF pbufs. + * + * Used to queue packets on behalf of the lwIP stack, such as + * ARP based queueing. + * + * Go through a pbuf chain and replace any PBUF_REF buffers + * with PBUF_POOL (or PBUF_RAM) pbufs, each taking a copy of + * the referenced data. + * + * @note You MUST explicitly use p = pbuf_take(p); + * The pbuf you give as argument, may have been replaced + * by pbuf_take()! + * + * @note Any replaced pbufs will be freed through pbuf_free(). + * This may deallocate them if they become no longer referenced. + * + * @param p Head of pbuf chain to process + * + * @return Pointer to head of pbuf chain + */ +struct pbuf * +pbuf_take(struct pbuf *p) +{ + struct pbuf *q , *prev, *head; + LWIP_ASSERT("pbuf_take: p != NULL\n", p != NULL); + LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE | 3, ("pbuf_take(%p)\n", (void*)p)); + + prev = NULL; + head = p; + /* iterate through pbuf chain */ + do + { + /* pbuf is of type PBUF_REF? */ + if (p->flags == PBUF_FLAG_REF) { + LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE, ("pbuf_take: encountered PBUF_REF %p\n", (void *)p)); + /* allocate a pbuf (w/ payload) fully in RAM */ + /* PBUF_POOL buffers are faster if we can use them */ + if (p->len <= PBUF_POOL_BUFSIZE) { + q = pbuf_alloc(PBUF_RAW, p->len, PBUF_POOL); + if (q == NULL) LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE | 2, ("pbuf_take: Could not allocate PBUF_POOL\n")); + } else { + /* no replacement pbuf yet */ + q = NULL; + LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE | 2, ("pbuf_take: PBUF_POOL too small to replace PBUF_REF\n")); + } + /* no (large enough) PBUF_POOL was available? retry with PBUF_RAM */ + if (q == NULL) { + q = pbuf_alloc(PBUF_RAW, p->len, PBUF_RAM); + if (q == NULL) LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE | 2, ("pbuf_take: Could not allocate PBUF_RAM\n")); + } + /* replacement pbuf could be allocated? */ + if (q != NULL) + { + /* copy p to q */ + /* copy successor */ + q->next = p->next; + /* remove linkage from original pbuf */ + p->next = NULL; + /* remove linkage to original pbuf */ + if (prev != NULL) { + /* prev->next == p at this point */ + LWIP_ASSERT("prev->next == p", prev->next == p); + /* break chain and insert new pbuf instead */ + prev->next = q; + /* prev == NULL, so we replaced the head pbuf of the chain */ + } else { + head = q; + } + /* copy pbuf payload */ + memcpy(q->payload, p->payload, p->len); + q->tot_len = p->tot_len; + q->len = p->len; + /* in case p was the first pbuf, it is no longer refered to by + * our caller, as the caller MUST do p = pbuf_take(p); + * in case p was not the first pbuf, it is no longer refered to + * by prev. we can safely free the pbuf here. + * (note that we have set p->next to NULL already so that + * we will not free the rest of the chain by accident.) + */ + pbuf_free(p); + /* do not copy ref, since someone else might be using the old buffer */ + LWIP_DEBUGF(PBUF_DEBUG, ("pbuf_take: replaced PBUF_REF %p with %p\n", (void *)p, (void *)q)); + p = q; + } else { + /* deallocate chain */ + pbuf_free(head); + LWIP_DEBUGF(PBUF_DEBUG | 2, ("pbuf_take: failed to allocate replacement pbuf for %p\n", (void *)p)); + return NULL; + } + /* p->flags != PBUF_FLAG_REF */ + } else { + LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE | 1, ("pbuf_take: skipping pbuf not of type PBUF_REF\n")); + } + /* remember this pbuf */ + prev = p; + /* proceed to next pbuf in original chain */ + p = p->next; + } while (p); + LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE | 1, ("pbuf_take: end of chain reached.\n")); + + return head; +} + +/** + * Dechains the first pbuf from its succeeding pbufs in the chain. + * + * Makes p->tot_len field equal to p->len. + * @param p pbuf to dechain + * @return remainder of the pbuf chain, or NULL if it was de-allocated. + * @note May not be called on a packet queue. + */ +struct pbuf * +pbuf_dechain(struct pbuf *p) +{ + struct pbuf *q; + u8_t tail_gone = 1; + /* tail */ + q = p->next; + /* pbuf has successor in chain? */ + if (q != NULL) { + /* assert tot_len invariant: (p->tot_len == p->len + (p->next? p->next->tot_len: 0) */ + LWIP_ASSERT("p->tot_len == p->len + q->tot_len", q->tot_len == p->tot_len - p->len); + /* enforce invariant if assertion is disabled */ + q->tot_len = p->tot_len - p->len; + /* decouple pbuf from remainder */ + p->next = NULL; + /* total length of pbuf p is its own length only */ + p->tot_len = p->len; + /* q is no longer referenced by p, free it */ + LWIP_DEBUGF(PBUF_DEBUG | DBG_STATE, ("pbuf_dechain: unreferencing %p\n", (void *)q)); + tail_gone = pbuf_free(q); + if (tail_gone > 0) LWIP_DEBUGF(PBUF_DEBUG | DBG_STATE, + ("pbuf_dechain: deallocated %p (as it is no longer referenced)\n", (void *)q)); + /* return remaining tail or NULL if deallocated */ + } + /* assert tot_len invariant: (p->tot_len == p->len + (p->next? p->next->tot_len: 0) */ + LWIP_ASSERT("p->tot_len == p->len", p->tot_len == p->len); + return (tail_gone > 0? NULL: q); +}
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/core/raw.c @@ -0,0 +1,310 @@ +/** + * @file + * Raw Access module + * + */ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + + +/* raw.c + * + * The code for the Raw Access to the IP + * + */ + +#include "lwip/opt.h" + +#include "lwip/def.h" +#include "lwip/memp.h" +#include "lwip/inet.h" +#include "lwip/ip_addr.h" +#include "lwip/netif.h" +#include "lwip/raw.h" + +#include "lwip/stats.h" + +#include "arch/perf.h" +#include "lwip/snmp.h" + +#if LWIP_RAW +/* The list of RAW PCBs */ + +static struct raw_pcb *raw_pcbs = NULL; + + +void +raw_init(void) +{ + raw_pcbs = NULL; +} + +/** + * Determine if in incoming IP packet is covered by a RAW pcb and + * and process it if possible + * + * Given an incoming IP datagram (as a chain of pbufs) this function + * finds a corresponding RAW PCB and + * + * @param pbuf pbuf to be demultiplexed to a RAW PCB. + * @param netif network interface on which the datagram was received. + * @return 0 if packet is not eated (pbuf needs to be freed then) + * or 1 if the packet has been eaten (pbuf needs not to be freed + * then) + * + */ +int +raw_input(struct pbuf *p, struct netif *inp) +{ + struct raw_pcb *pcb; + struct ip_hdr *iphdr; + int proto; + int rc = 0; + + iphdr = p->payload; + proto = IPH_PROTO(iphdr); + + for(pcb = raw_pcbs; pcb != NULL; pcb = pcb->next) { + if (pcb->protocol == proto) { + if (pcb->recv) { + if (!pcb->recv(pcb->recv_arg, pcb, p, &(iphdr->src))) + return 0; + } + pbuf_free(p); + rc = 1; + break; + } + } + return rc; +} + +/** + * Bind a RAW PCB. + * + * @param pcb RAW PCB to be bound with a local address ipaddr. + * @param ipaddr local IP address to bind with. Use IP_ADDR_ANY to + * bind to all local interfaces. + * + * @return lwIP error code. + * - ERR_OK. Successful. No error occured. + * - ERR_USE. The specified ipaddr is already bound to by + * another RAW PCB. + * + * @see raw_disconnect() + */ +err_t +raw_bind(struct raw_pcb *pcb, struct ip_addr *ipaddr) +{ + ip_addr_set(&pcb->local_ip, ipaddr); + return ERR_OK; +} + +/** + * Connect an RAW PCB. This function is required by upper layers + * of lwip. Using the raw api you could use raw_send_to() instead + * + * This will associate the RAW PCB with the remote address. + * + * @param pcb RAW PCB to be connected with remote address ipaddr and port. + * @param ipaddr remote IP address to connect with. + * + * @return lwIP error code + * + * @see raw_disconnect() and raw_send_to() + */ +err_t +raw_connect(struct raw_pcb *pcb, struct ip_addr *ipaddr) +{ + ip_addr_set(&pcb->remote_ip, ipaddr); + return ERR_OK; +} + + +/** + * Set the callback function if a RAW packet with the pcb's protocol + * is received. If the callback function returns a value unequal 0 + * the raw packet is "eaten" and not forwarded to any other raw pcb + * including lwip itself + */ +void +raw_recv(struct raw_pcb *pcb, + int (* recv)(void *arg, struct raw_pcb *upcb, struct pbuf *p, + struct ip_addr *addr), + void *recv_arg) +{ + /* remember recv() callback and user data */ + pcb->recv = recv; + pcb->recv_arg = recv_arg; +} + +/** + * Send the raw IP packet to the given address. Note that actually you cannot + * modify the IP headers (this is inconsitent with the receive callback where + * you actually get the IP headers), you can only specifiy the ip payload here. + * It requires some more changes in LWIP. (there will be a raw_send() function + * then) + * + * @param pcb the raw pcb which to send + * @param p the ip payload to send + * @param ipaddr the destination address of the whole IP packet + * + */ +err_t +raw_send_to(struct raw_pcb *pcb, struct pbuf *p, struct ip_addr *ipaddr) +{ + err_t err; + struct netif *netif; + struct ip_addr *src_ip; + struct pbuf *q; /* q will be sent down the stack */ + + LWIP_DEBUGF(RAW_DEBUG | DBG_TRACE | 3, ("raw_send_to\n")); + + /* not enough space to add an IP header to first pbuf in given p chain? */ + if (pbuf_header(p, IP_HLEN)) { + /* allocate header in new pbuf */ + q = pbuf_alloc(PBUF_IP, 0, PBUF_RAM); + /* new header pbuf could not be allocated? */ + if (q == NULL) { + LWIP_DEBUGF(RAW_DEBUG | DBG_TRACE | 2, ("raw_send_to: could not allocate header\n")); + return ERR_MEM; + } + /* chain header q in front of given pbuf p */ + pbuf_chain(q, p); + /* { first pbuf q points to header pbuf } */ + LWIP_DEBUGF(RAW_DEBUG, ("raw_send_to: added header pbuf %p before given pbuf %p\n", (void *)q, (void *)p)); + } else { + /* first pbuf q equals given pbuf */ + q = p; + pbuf_header(q, -IP_HLEN); + } + + if ((netif = ip_route(ipaddr)) == NULL) { + LWIP_DEBUGF(RAW_DEBUG | 1, ("raw_send_to: No route to 0x%lx\n", ipaddr->addr)); +#if RAW_STATS + /* ++lwip_stats.raw.rterr;*/ +#endif /* RAW_STATS */ + if (q != p) { + pbuf_free(q); + } + return ERR_RTE; + } + + if (ip_addr_isany(&pcb->local_ip)) { + /* use outgoing network interface IP address as source address */ + src_ip = &(netif->ip_addr); + } else { + /* use RAW PCB local IP address as source address */ + src_ip = &(pcb->local_ip); + } + + err = ip_output_if (q, src_ip, ipaddr, pcb->ttl, pcb->tos, pcb->protocol, netif); + + /* did we chain a header earlier? */ + if (q != p) { + /* free the header */ + pbuf_free(q); + } + return err; +} + +/** + * Send the raw IP packet to the address given by raw_connect() + * + * @param pcb the raw pcb which to send + * @param p the ip payload to send + * @param ipaddr the destination address of the whole IP packet + * + */ +err_t +raw_send(struct raw_pcb *pcb, struct pbuf *p) +{ + return raw_send_to(pcb,p,&pcb->remote_ip); +} + +/** + * Remove an RAW PCB. + * + * @param pcb RAW PCB to be removed. The PCB is removed from the list of + * RAW PCB's and the data structure is freed from memory. + * + * @see raw_new() + */ +void +raw_remove(struct raw_pcb *pcb) +{ + struct raw_pcb *pcb2; + /* pcb to be removed is first in list? */ + if (raw_pcbs == pcb) { + /* make list start at 2nd pcb */ + raw_pcbs = raw_pcbs->next; + /* pcb not 1st in list */ + } else for(pcb2 = raw_pcbs; pcb2 != NULL; pcb2 = pcb2->next) { + /* find pcb in raw_pcbs list */ + if (pcb2->next != NULL && pcb2->next == pcb) { + /* remove pcb from list */ + pcb2->next = pcb->next; + } + } + memp_free(MEMP_RAW_PCB, pcb); +} + +/** + * Create a RAW PCB. + * + * @return The RAW PCB which was created. NULL if the PCB data structure + * could not be allocated. + * + * @param proto the protocol number of the IPs payload (e.g. IP_PROTO_ICMP) + * + * @see raw_remove() + */ +struct raw_pcb * +raw_new(u16_t proto) { + struct raw_pcb *pcb; + + LWIP_DEBUGF(RAW_DEBUG | DBG_TRACE | 3, ("raw_new\n")); + + pcb = memp_malloc(MEMP_RAW_PCB); + /* could allocate RAW PCB? */ + if (pcb != NULL) { + /* initialize PCB to all zeroes */ + memset(pcb, 0, sizeof(struct raw_pcb)); + pcb->protocol = proto; + pcb->ttl = RAW_TTL; + pcb->next = raw_pcbs; + raw_pcbs = pcb; + } + + return pcb; +} + +#endif /* LWIP_RAW */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/core/stats.c @@ -0,0 +1,114 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + + +#include "lwip/opt.h" + +#include "lwip/def.h" + +#include "lwip/stats.h" +#include "lwip/mem.h" + + +#if LWIP_STATS +struct stats_ lwip_stats; + +void +stats_init(void) +{ + memset(&lwip_stats, 0, sizeof(struct stats_)); +} +#if LWIP_STATS_DISPLAY +void +stats_display_proto(struct stats_proto *proto, char *name) +{ + LWIP_PLATFORM_DIAG(("\n%s\n\t", name)); + LWIP_PLATFORM_DIAG(("xmit: %d\n\t", proto->xmit)); + LWIP_PLATFORM_DIAG(("rexmit: %d\n\t", proto->rexmit)); + LWIP_PLATFORM_DIAG(("recv: %d\n\t", proto->recv)); + LWIP_PLATFORM_DIAG(("fw: %d\n\t", proto->fw)); + LWIP_PLATFORM_DIAG(("drop: %d\n\t", proto->drop)); + LWIP_PLATFORM_DIAG(("chkerr: %d\n\t", proto->chkerr)); + LWIP_PLATFORM_DIAG(("lenerr: %d\n\t", proto->lenerr)); + LWIP_PLATFORM_DIAG(("memerr: %d\n\t", proto->memerr)); + LWIP_PLATFORM_DIAG(("rterr: %d\n\t", proto->rterr)); + LWIP_PLATFORM_DIAG(("proterr: %d\n\t", proto->proterr)); + LWIP_PLATFORM_DIAG(("opterr: %d\n\t", proto->opterr)); + LWIP_PLATFORM_DIAG(("err: %d\n\t", proto->err)); + LWIP_PLATFORM_DIAG(("cachehit: %d\n", proto->cachehit)); +} + +void +stats_display_pbuf(struct stats_pbuf *pbuf) +{ + LWIP_PLATFORM_DIAG(("\nPBUF\n\t")); + LWIP_PLATFORM_DIAG(("avail: %d\n\t", pbuf->avail)); + LWIP_PLATFORM_DIAG(("used: %d\n\t", pbuf->used)); + LWIP_PLATFORM_DIAG(("max: %d\n\t", pbuf->max)); + LWIP_PLATFORM_DIAG(("err: %d\n\t", pbuf->err)); + LWIP_PLATFORM_DIAG(("alloc_locked: %d\n\t", pbuf->alloc_locked)); + LWIP_PLATFORM_DIAG(("refresh_locked: %d\n", pbuf->refresh_locked)); +} + +void +stats_display_mem(struct stats_mem *mem, char *name) +{ + LWIP_PLATFORM_DIAG(("\n MEM %s\n\t", name)); + LWIP_PLATFORM_DIAG(("avail: %d\n\t", mem->avail)); + LWIP_PLATFORM_DIAG(("used: %d\n\t", mem->used)); + LWIP_PLATFORM_DIAG(("max: %d\n\t", mem->max)); + LWIP_PLATFORM_DIAG(("err: %d\n", mem->err)); + +} + +void +stats_display(void) +{ + int i; + char * memp_names[] = {"PBUF", "RAW_PCB", "UDP_PCB", "TCP_PCB", "TCP_PCB_LISTEN", + "TCP_SEG", "NETBUF", "NETCONN", "API_MSG", "TCP_MSG", "TIMEOUT"}; + stats_display_proto(&lwip_stats.link, "LINK"); + stats_display_proto(&lwip_stats.ip_frag, "IP_FRAG"); + stats_display_proto(&lwip_stats.ip, "IP"); + stats_display_proto(&lwip_stats.icmp, "ICMP"); + stats_display_proto(&lwip_stats.udp, "UDP"); + stats_display_proto(&lwip_stats.tcp, "TCP"); + stats_display_pbuf(&lwip_stats.pbuf); + stats_display_mem(&lwip_stats.mem, "HEAP"); + for (i = 0; i < MEMP_MAX; i++) { + stats_display_mem(&lwip_stats.memp[i], memp_names[i]); + } + +} +#endif /* LWIP_STATS_DISPLAY */ +#endif /* LWIP_STATS */ +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/core/sys.c @@ -0,0 +1,294 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + +#include "lwip/sys.h" +#include "lwip/opt.h" +#include "lwip/def.h" +#include "lwip/memp.h" + +#if (NO_SYS == 0) + +struct sswt_cb +{ + int timeflag; + sys_sem_t *psem; +}; + + + +void +sys_mbox_fetch(sys_mbox_t mbox, void **msg) +{ + u32_t time; + struct sys_timeouts *timeouts; + struct sys_timeout *tmptimeout; + sys_timeout_handler h; + void *arg; + + + again: + timeouts = sys_arch_timeouts(); + + if (!timeouts || !timeouts->next) { + sys_arch_mbox_fetch(mbox, msg, 0); + } else { + if (timeouts->next->time > 0) { + time = sys_arch_mbox_fetch(mbox, msg, timeouts->next->time); + } else { + time = SYS_ARCH_TIMEOUT; + } + + if (time == SYS_ARCH_TIMEOUT) { + /* If time == SYS_ARCH_TIMEOUT, a timeout occured before a message + could be fetched. We should now call the timeout handler and + deallocate the memory allocated for the timeout. */ + tmptimeout = timeouts->next; + timeouts->next = tmptimeout->next; + h = tmptimeout->h; + arg = tmptimeout->arg; + memp_free(MEMP_SYS_TIMEOUT, tmptimeout); + if (h != NULL) { + LWIP_DEBUGF(SYS_DEBUG, ("smf calling h=%p(%p)\n", (void *)h, (void *)arg)); + h(arg); + } + + /* We try again to fetch a message from the mbox. */ + goto again; + } else { + /* If time != SYS_ARCH_TIMEOUT, a message was received before the timeout + occured. The time variable is set to the number of + milliseconds we waited for the message. */ + if (time <= timeouts->next->time) { + timeouts->next->time -= time; + } else { + timeouts->next->time = 0; + } + } + + } +} + +void +sys_sem_wait(sys_sem_t sem) +{ + u32_t time; + struct sys_timeouts *timeouts; + struct sys_timeout *tmptimeout; + sys_timeout_handler h; + void *arg; + + /* while (sys_arch_sem_wait(sem, 1000) == 0); + return;*/ + + again: + + timeouts = sys_arch_timeouts(); + + if (!timeouts || !timeouts->next) { + sys_arch_sem_wait(sem, 0); + } else { + if (timeouts->next->time > 0) { + time = sys_arch_sem_wait(sem, timeouts->next->time); + } else { + time = SYS_ARCH_TIMEOUT; + } + + if (time == SYS_ARCH_TIMEOUT) { + /* If time == SYS_ARCH_TIMEOUT, a timeout occured before a message + could be fetched. We should now call the timeout handler and + deallocate the memory allocated for the timeout. */ + tmptimeout = timeouts->next; + timeouts->next = tmptimeout->next; + h = tmptimeout->h; + arg = tmptimeout->arg; + memp_free(MEMP_SYS_TIMEOUT, tmptimeout); + if (h != NULL) { + LWIP_DEBUGF(SYS_DEBUG, ("ssw h=%p(%p)\n", (void *)h, (void *)arg)); + h(arg); + } + + + /* We try again to fetch a message from the mbox. */ + goto again; + } else { + /* If time != SYS_ARCH_TIMEOUT, a message was received before the timeout + occured. The time variable is set to the number of + milliseconds we waited for the message. */ + if (time <= timeouts->next->time) { + timeouts->next->time -= time; + } else { + timeouts->next->time = 0; + } + } + + } +} + +void +sys_timeout(u32_t msecs, sys_timeout_handler h, void *arg) +{ + struct sys_timeouts *timeouts; + struct sys_timeout *timeout, *t; + + timeout = memp_malloc(MEMP_SYS_TIMEOUT); + if (timeout == NULL) { + return; + } + timeout->next = NULL; + timeout->h = h; + timeout->arg = arg; + timeout->time = msecs; + + timeouts = sys_arch_timeouts(); + + LWIP_DEBUGF(SYS_DEBUG, ("sys_timeout: %p msecs=%lu h=%p arg=%p\n", + (void *)timeout, msecs, (void *)h, (void *)arg)); + + LWIP_ASSERT("sys_timeout: timeouts != NULL", timeouts != NULL); + + if (timeouts->next == NULL) { + timeouts->next = timeout; + return; + } + + if (timeouts->next->time > msecs) { + timeouts->next->time -= msecs; + timeout->next = timeouts->next; + timeouts->next = timeout; + } else { + for(t = timeouts->next; t != NULL; t = t->next) { + timeout->time -= t->time; + if (t->next == NULL || t->next->time > timeout->time) { + if (t->next != NULL) { + t->next->time -= timeout->time; + } + timeout->next = t->next; + t->next = timeout; + break; + } + } + } + +} + +/* Go through timeout list (for this task only) and remove the first matching entry, + even though the timeout has not triggered yet. +*/ + +void +sys_untimeout(sys_timeout_handler h, void *arg) +{ + struct sys_timeouts *timeouts; + struct sys_timeout *prev_t, *t; + + timeouts = sys_arch_timeouts(); + + if (timeouts->next == NULL) + return; + + for (t = timeouts->next, prev_t = NULL; t != NULL; prev_t = t, t = t->next) + { + if ((t->h == h) && (t->arg == arg)) + { + /* We have a match */ + /* Unlink from previous in list */ + if (prev_t == NULL) + timeouts->next = t->next; + else + prev_t->next = t->next; + /* If not the last one, add time of this one back to next */ + if (t->next != NULL) + t->next->time += t->time; + memp_free(MEMP_SYS_TIMEOUT, t); + return; + } + } + return; +} + + + + + +static void +sswt_handler(void *arg) +{ + struct sswt_cb *sswt_cb = (struct sswt_cb *) arg; + + /* Timeout. Set flag to TRUE and signal semaphore */ + sswt_cb->timeflag = 1; + sys_sem_signal(*(sswt_cb->psem)); +} + +/* Wait for a semaphore with timeout (specified in ms) */ +/* timeout = 0: wait forever */ +/* Returns 0 on timeout. 1 otherwise */ + +int +sys_sem_wait_timeout(sys_sem_t sem, u32_t timeout) +{ + struct sswt_cb sswt_cb; + + sswt_cb.psem = &sem; + sswt_cb.timeflag = 0; + + /* If timeout is zero, then just wait forever */ + if (timeout > 0) + /* Create a timer and pass it the address of our flag */ + sys_timeout(timeout, sswt_handler, &sswt_cb); + sys_sem_wait(sem); + /* Was it a timeout? */ + if (sswt_cb.timeflag) + { + /* timeout */ + return 0; + } else { + /* Not a timeout. Remove timeout entry */ + sys_untimeout(sswt_handler, &sswt_cb); + return 1; + } + +} + + +void +sys_msleep(u32_t ms) +{ + sys_sem_t delaysem = sys_sem_new(0); + + sys_sem_wait_timeout(delaysem, ms); + + sys_sem_free(delaysem); +} + + +#endif /* NO_SYS */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/core/tcp.c @@ -0,0 +1,1235 @@ +/** + * @file + * + * Transmission Control Protocol for IP + * + * This file contains common functions for the TCP implementation, such as functinos + * for manipulating the data structures and the TCP timer functions. TCP functions + * related to input and output is found in tcp_in.c and tcp_out.c respectively. + * + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + +#include "lwip/opt.h" +#include "lwip/def.h" +#include "lwip/mem.h" +#include "lwip/memp.h" + +#include "lwip/tcp.h" +#if LWIP_TCP + +/* Incremented every coarse grained timer shot + (typically every 500 ms, determined by TCP_COARSE_TIMEOUT). */ +u32_t tcp_ticks; +const u8_t tcp_backoff[13] = + { 1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7}; + +/* The TCP PCB lists. */ + +/** List of all TCP PCBs in LISTEN state */ +union tcp_listen_pcbs_t tcp_listen_pcbs; +/** List of all TCP PCBs that are in a state in which + * they accept or send data. */ +struct tcp_pcb *tcp_active_pcbs; +/** List of all TCP PCBs in TIME-WAIT state */ +struct tcp_pcb *tcp_tw_pcbs; + +struct tcp_pcb *tcp_tmp_pcb; + +static u8_t tcp_timer; +static u16_t tcp_new_port(void); + +/** + * Initializes the TCP layer. + */ +void +tcp_init(void) +{ + /* Clear globals. */ + tcp_listen_pcbs.listen_pcbs = NULL; + tcp_active_pcbs = NULL; + tcp_tw_pcbs = NULL; + tcp_tmp_pcb = NULL; + + /* initialize timer */ + tcp_ticks = 0; + tcp_timer = 0; + +} + +/** + * Called periodically to dispatch TCP timers. + * + */ +void +tcp_tmr(void) +{ + /* Call tcp_fasttmr() every 250 ms */ + tcp_fasttmr(); + + if (++tcp_timer & 1) { + /* Call tcp_tmr() every 500 ms, i.e., every other timer + tcp_tmr() is called. */ + tcp_slowtmr(); + } +} + +/** + * Closes the connection held by the PCB. + * + */ +err_t +tcp_close(struct tcp_pcb *pcb) +{ + err_t err; + +#if TCP_DEBUG + LWIP_DEBUGF(TCP_DEBUG, ("tcp_close: closing in state ")); + tcp_debug_print_state(pcb->state); + LWIP_DEBUGF(TCP_DEBUG, ("\n")); +#endif /* TCP_DEBUG */ + switch (pcb->state) { + case LISTEN: + err = ERR_OK; + tcp_pcb_remove((struct tcp_pcb **)&tcp_listen_pcbs.pcbs, pcb); + memp_free(MEMP_TCP_PCB_LISTEN, pcb); + pcb = NULL; + break; + case SYN_SENT: + err = ERR_OK; + tcp_pcb_remove(&tcp_active_pcbs, pcb); + memp_free(MEMP_TCP_PCB, pcb); + pcb = NULL; + break; + case SYN_RCVD: + case ESTABLISHED: + err = tcp_send_ctrl(pcb, TCP_FIN); + if (err == ERR_OK) { + pcb->state = FIN_WAIT_1; + } + break; + case CLOSE_WAIT: + err = tcp_send_ctrl(pcb, TCP_FIN); + if (err == ERR_OK) { + pcb->state = LAST_ACK; + } + break; + default: + /* Has already been closed, do nothing. */ + err = ERR_OK; + pcb = NULL; + break; + } + + if (pcb != NULL && err == ERR_OK) { + err = tcp_output(pcb); + } + return err; +} + +/** + * Aborts a connection by sending a RST to the remote host and deletes + * the local protocol control block. This is done when a connection is + * killed because of shortage of memory. + * + */ +void +tcp_abort(struct tcp_pcb *pcb) +{ + u32_t seqno, ackno; + u16_t remote_port, local_port; + struct ip_addr remote_ip, local_ip; +#if LWIP_CALLBACK_API + void (* errf)(void *arg, err_t err); +#endif /* LWIP_CALLBACK_API */ + void *errf_arg; + + + /* Figure out on which TCP PCB list we are, and remove us. If we + are in an active state, call the receive function associated with + the PCB with a NULL argument, and send an RST to the remote end. */ + if (pcb->state == TIME_WAIT) { + tcp_pcb_remove(&tcp_tw_pcbs, pcb); + memp_free(MEMP_TCP_PCB, pcb); + } else { + seqno = pcb->snd_nxt; + ackno = pcb->rcv_nxt; + ip_addr_set(&local_ip, &(pcb->local_ip)); + ip_addr_set(&remote_ip, &(pcb->remote_ip)); + local_port = pcb->local_port; + remote_port = pcb->remote_port; +#if LWIP_CALLBACK_API + errf = pcb->errf; +#endif /* LWIP_CALLBACK_API */ + errf_arg = pcb->callback_arg; + tcp_pcb_remove(&tcp_active_pcbs, pcb); + if (pcb->unacked != NULL) { + tcp_segs_free(pcb->unacked); + } + if (pcb->unsent != NULL) { + tcp_segs_free(pcb->unsent); + } +#if TCP_QUEUE_OOSEQ + if (pcb->ooseq != NULL) { + tcp_segs_free(pcb->ooseq); + } +#endif /* TCP_QUEUE_OOSEQ */ + memp_free(MEMP_TCP_PCB, pcb); + TCP_EVENT_ERR(errf, errf_arg, ERR_ABRT); + LWIP_DEBUGF(TCP_RST_DEBUG, ("tcp_abort: sending RST\n")); + tcp_rst(seqno, ackno, &local_ip, &remote_ip, local_port, remote_port); + } +} + +/** + * Binds the connection to a local portnumber and IP address. If the + * IP address is not given (i.e., ipaddr == NULL), the IP address of + * the outgoing network interface is used instead. + * + */ + +err_t +tcp_bind(struct tcp_pcb *pcb, struct ip_addr *ipaddr, u16_t port) +{ + struct tcp_pcb *cpcb; +#if SO_REUSE + int reuse_port_all_set = 1; +#endif /* SO_REUSE */ + + if (port == 0) { + port = tcp_new_port(); + } +#if SO_REUSE == 0 + /* Check if the address already is in use. */ + for(cpcb = (struct tcp_pcb *)tcp_listen_pcbs.pcbs; + cpcb != NULL; cpcb = cpcb->next) { + if (cpcb->local_port == port) { + if (ip_addr_isany(&(cpcb->local_ip)) || + ip_addr_isany(ipaddr) || + ip_addr_cmp(&(cpcb->local_ip), ipaddr)) { + return ERR_USE; + } + } + } + for(cpcb = tcp_active_pcbs; + cpcb != NULL; cpcb = cpcb->next) { + if (cpcb->local_port == port) { + if (ip_addr_isany(&(cpcb->local_ip)) || + ip_addr_isany(ipaddr) || + ip_addr_cmp(&(cpcb->local_ip), ipaddr)) { + return ERR_USE; + } + } + } +#else /* SO_REUSE */ + /* Search through list of PCB's in LISTEN state. + + If there is a PCB bound to specified port and IP_ADDR_ANY another PCB can be bound to the interface IP + or to the loopback address on the same port if SOF_REUSEADDR is set. Any combination of PCB's bound to + the same local port, but to one address out of {IP_ADDR_ANY, 127.0.0.1, interface IP} at a time is valid. + But no two PCB's bound to same local port and same local address is valid. + + If SOF_REUSEPORT is set several PCB's can be bound to same local port and same local address also. But then + all PCB's must have the SOF_REUSEPORT option set. + + When the two options aren't set and specified port is already bound, ERR_USE is returned saying that + address is already in use. */ + for(cpcb = (struct tcp_pcb *)tcp_listen_pcbs.pcbs; cpcb != NULL; cpcb = cpcb->next) { + if(cpcb->local_port == port) { + if(ip_addr_cmp(&(cpcb->local_ip), ipaddr)) { + if(pcb->so_options & SOF_REUSEPORT) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_bind: in listening PCB's: SO_REUSEPORT set and same address.\n")); + reuse_port_all_set = (reuse_port_all_set && (cpcb->so_options & SOF_REUSEPORT)); + } + else { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_bind: in listening PCB's: SO_REUSEPORT not set and same address.\n")); + return ERR_USE; + } + } + else if((ip_addr_isany(ipaddr) && !ip_addr_isany(&(cpcb->local_ip))) || + (!ip_addr_isany(ipaddr) && ip_addr_isany(&(cpcb->local_ip)))) { + if(!(pcb->so_options & SOF_REUSEADDR) && !(pcb->so_options & SOF_REUSEPORT)) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_bind: in listening PCB's SO_REUSEPORT or SO_REUSEADDR not set and not the same address.\n")); + return ERR_USE; + } + else { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_bind: in listening PCB's SO_REUSEPORT or SO_REUSEADDR set and not the same address.\n")); + } + } + } + } + + /* Search through list of PCB's in a state in which they can accept or send data. Same decription as for + PCB's in state LISTEN applies to this PCB's regarding the options SOF_REUSEADDR and SOF_REUSEPORT. */ + for(cpcb = tcp_active_pcbs; cpcb != NULL; cpcb = cpcb->next) { + if(cpcb->local_port == port) { + if(ip_addr_cmp(&(cpcb->local_ip), ipaddr)) { + if(pcb->so_options & SOF_REUSEPORT) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_bind: in active PCB's SO_REUSEPORT set and same address.\n")); + reuse_port_all_set = (reuse_port_all_set && (cpcb->so_options & SOF_REUSEPORT)); + } + else { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_bind: in active PCB's SO_REUSEPORT not set and same address.\n")); + return ERR_USE; + } + } + else if((ip_addr_isany(ipaddr) && !ip_addr_isany(&(cpcb->local_ip))) || + (!ip_addr_isany(ipaddr) && ip_addr_isany(&(cpcb->local_ip)))) { + if(!(pcb->so_options & SOF_REUSEADDR) && !(pcb->so_options & SOF_REUSEPORT)) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_bind: in active PCB's SO_REUSEPORT or SO_REUSEADDR not set and not the same address.\n")); + return ERR_USE; + } + else { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_bind: in active PCB's SO_REUSEPORT or SO_REUSEADDR set and not the same address.\n")); + } + } + } + } + + /* Search through list of PCB's in TIME_WAIT state. If SO_REUSEADDR is set a bound combination [IP, port} + can be rebound. The same applies when SOF_REUSEPORT is set. + + If SOF_REUSEPORT is set several PCB's can be bound to same local port and same local address also. But then + all PCB's must have the SOF_REUSEPORT option set. + + When the two options aren't set and specified port is already bound, ERR_USE is returned saying that + address is already in use. */ + for(cpcb = tcp_tw_pcbs; cpcb != NULL; cpcb = cpcb->next) { + if(cpcb->local_port == port) { + if(ip_addr_cmp(&(cpcb->local_ip), ipaddr)) { + if(!(pcb->so_options & SOF_REUSEADDR) && !(pcb->so_options & SOF_REUSEPORT)) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_bind: in TIME_WAIT PCB's SO_REUSEPORT or SO_REUSEADDR not set and same address.\n")); + return ERR_USE; + } + else if(pcb->so_options & SOF_REUSEPORT) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_bind: in TIME_WAIT PCB's SO_REUSEPORT set and same address.\n")); + reuse_port_all_set = (reuse_port_all_set && (cpcb->so_options & SOF_REUSEPORT)); + } + } + } + } + + /* If SOF_REUSEPORT isn't set in all PCB's bound to specified port and local address specified then + {IP, port} can't be reused. */ + if(!reuse_port_all_set) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_bind: not all sockets have SO_REUSEPORT set.\n")); + return ERR_USE; + } +#endif /* SO_REUSE */ + + if (!ip_addr_isany(ipaddr)) { + pcb->local_ip = *ipaddr; + } + pcb->local_port = port; + LWIP_DEBUGF(TCP_DEBUG, ("tcp_bind: bind to port %u\n", port)); + return ERR_OK; +} +#if LWIP_CALLBACK_API +static err_t +tcp_accept_null(void *arg, struct tcp_pcb *pcb, err_t err) +{ + (void)arg; + (void)pcb; + (void)err; + + return ERR_ABRT; +} +#endif /* LWIP_CALLBACK_API */ + +/** + * Set the state of the connection to be LISTEN, which means that it + * is able to accept incoming connections. The protocol control block + * is reallocated in order to consume less memory. Setting the + * connection to LISTEN is an irreversible process. + * + */ +struct tcp_pcb * +tcp_listen(struct tcp_pcb *pcb) +{ + struct tcp_pcb_listen *lpcb; + + /* already listening? */ + if (pcb->state == LISTEN) { + return pcb; + } + lpcb = memp_malloc(MEMP_TCP_PCB_LISTEN); + if (lpcb == NULL) { + return NULL; + } + lpcb->callback_arg = pcb->callback_arg; + lpcb->local_port = pcb->local_port; + lpcb->state = LISTEN; + lpcb->so_options = pcb->so_options; + lpcb->so_options |= SOF_ACCEPTCONN; + lpcb->ttl = pcb->ttl; + lpcb->tos = pcb->tos; + ip_addr_set(&lpcb->local_ip, &pcb->local_ip); + memp_free(MEMP_TCP_PCB, pcb); +#if LWIP_CALLBACK_API + lpcb->accept = tcp_accept_null; +#endif /* LWIP_CALLBACK_API */ + TCP_REG(&tcp_listen_pcbs.listen_pcbs, lpcb); + return (struct tcp_pcb *)lpcb; +} + +/** + * This function should be called by the application when it has + * processed the data. The purpose is to advertise a larger window + * when the data has been processed. + * + */ +void +tcp_recved(struct tcp_pcb *pcb, u16_t len) +{ + if ((u32_t)pcb->rcv_wnd + len > TCP_WND) { + pcb->rcv_wnd = TCP_WND; + } else { + pcb->rcv_wnd += len; + } + if (!(pcb->flags & TF_ACK_DELAY) && + !(pcb->flags & TF_ACK_NOW)) { + /* + * We send an ACK here (if one is not already pending, hence + * the above tests) as tcp_recved() implies that the application + * has processed some data, and so we can open the receiver's + * window to allow more to be transmitted. This could result in + * two ACKs being sent for each received packet in some limited cases + * (where the application is only receiving data, and is slow to + * process it) but it is necessary to guarantee that the sender can + * continue to transmit. + */ + tcp_ack(pcb); + } + + LWIP_DEBUGF(TCP_DEBUG, ("tcp_recved: recveived %u bytes, wnd %u (%u).\n", + len, pcb->rcv_wnd, TCP_WND - pcb->rcv_wnd)); +} + +/** + * A nastly hack featuring 'goto' statements that allocates a + * new TCP local port. + */ +static u16_t +tcp_new_port(void) +{ + struct tcp_pcb *pcb; +#ifndef TCP_LOCAL_PORT_RANGE_START +#define TCP_LOCAL_PORT_RANGE_START 4096 +#define TCP_LOCAL_PORT_RANGE_END 0x7fff +#endif + static u16_t port = TCP_LOCAL_PORT_RANGE_START; + + again: + if (++port > TCP_LOCAL_PORT_RANGE_END) { + port = TCP_LOCAL_PORT_RANGE_START; + } + + for(pcb = tcp_active_pcbs; pcb != NULL; pcb = pcb->next) { + if (pcb->local_port == port) { + goto again; + } + } + for(pcb = tcp_tw_pcbs; pcb != NULL; pcb = pcb->next) { + if (pcb->local_port == port) { + goto again; + } + } + for(pcb = (struct tcp_pcb *)tcp_listen_pcbs.pcbs; pcb != NULL; pcb = pcb->next) { + if (pcb->local_port == port) { + goto again; + } + } + return port; +} + +/** + * Connects to another host. The function given as the "connected" + * argument will be called when the connection has been established. + * + */ +err_t +tcp_connect(struct tcp_pcb *pcb, struct ip_addr *ipaddr, u16_t port, + err_t (* connected)(void *arg, struct tcp_pcb *tpcb, err_t err)) +{ + u32_t optdata; + err_t ret; + u32_t iss; + + LWIP_DEBUGF(TCP_DEBUG, ("tcp_connect to port %u\n", port)); + if (ipaddr != NULL) { + pcb->remote_ip = *ipaddr; + } else { + return ERR_VAL; + } + pcb->remote_port = port; + if (pcb->local_port == 0) { + pcb->local_port = tcp_new_port(); + } + iss = tcp_next_iss(); + pcb->rcv_nxt = 0; + pcb->snd_nxt = iss; + pcb->lastack = iss - 1; + pcb->snd_lbb = iss - 1; + pcb->rcv_wnd = TCP_WND; + pcb->snd_wnd = TCP_WND; + pcb->mss = TCP_MSS; + pcb->cwnd = 1; + pcb->ssthresh = pcb->mss * 10; + pcb->state = SYN_SENT; +#if LWIP_CALLBACK_API + pcb->connected = connected; +#endif /* LWIP_CALLBACK_API */ + TCP_REG(&tcp_active_pcbs, pcb); + + /* Build an MSS option */ + optdata = htonl(((u32_t)2 << 24) | + ((u32_t)4 << 16) | + (((u32_t)pcb->mss / 256) << 8) | + (pcb->mss & 255)); + + ret = tcp_enqueue(pcb, NULL, 0, TCP_SYN, 0, (u8_t *)&optdata, 4); + if (ret == ERR_OK) { + tcp_output(pcb); + } + return ret; +} + +/** + * Called every 500 ms and implements the retransmission timer and the timer that + * removes PCBs that have been in TIME-WAIT for enough time. It also increments + * various timers such as the inactivity timer in each PCB. + */ +void +tcp_slowtmr(void) +{ + struct tcp_pcb *pcb, *pcb2, *prev; + u32_t eff_wnd; + u8_t pcb_remove; /* flag if a PCB should be removed */ + err_t err; + + err = ERR_OK; + + ++tcp_ticks; + + /* Steps through all of the active PCBs. */ + prev = NULL; + pcb = tcp_active_pcbs; + if (pcb == NULL) LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: no active pcbs\n")); + while (pcb != NULL) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: processing active pcb\n")); + LWIP_ASSERT("tcp_slowtmr: active pcb->state != CLOSED\n", pcb->state != CLOSED); + LWIP_ASSERT("tcp_slowtmr: active pcb->state != LISTEN\n", pcb->state != LISTEN); + LWIP_ASSERT("tcp_slowtmr: active pcb->state != TIME-WAIT\n", pcb->state != TIME_WAIT); + + pcb_remove = 0; + + if (pcb->state == SYN_SENT && pcb->nrtx == TCP_SYNMAXRTX) { + ++pcb_remove; + LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: max SYN retries reached\n")); + } + else if (pcb->nrtx == TCP_MAXRTX) { + ++pcb_remove; + LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: max DATA retries reached\n")); + } else { + ++pcb->rtime; + if (pcb->unacked != NULL && pcb->rtime >= pcb->rto) { + + /* Time for a retransmission. */ + LWIP_DEBUGF(TCP_RTO_DEBUG, ("tcp_slowtmr: rtime %u pcb->rto %u\n", + pcb->rtime, pcb->rto)); + + /* Double retransmission time-out unless we are trying to + * connect to somebody (i.e., we are in SYN_SENT). */ + if (pcb->state != SYN_SENT) { + pcb->rto = ((pcb->sa >> 3) + pcb->sv) << tcp_backoff[pcb->nrtx]; + } + tcp_rexmit(pcb); + /* Reduce congestion window and ssthresh. */ + eff_wnd = LWIP_MIN(pcb->cwnd, pcb->snd_wnd); + pcb->ssthresh = eff_wnd >> 1; + if (pcb->ssthresh < pcb->mss) { + pcb->ssthresh = pcb->mss * 2; + } + pcb->cwnd = pcb->mss; + LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_slowtmr: cwnd %u ssthresh %u\n", + pcb->cwnd, pcb->ssthresh)); + } + } + /* Check if this PCB has stayed too long in FIN-WAIT-2 */ + if (pcb->state == FIN_WAIT_2) { + if ((u32_t)(tcp_ticks - pcb->tmr) > + TCP_FIN_WAIT_TIMEOUT / TCP_SLOW_INTERVAL) { + ++pcb_remove; + LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: removing pcb stuck in FIN-WAIT-2\n")); + } + } + + /* Check if KEEPALIVE should be sent */ + if((pcb->so_options & SOF_KEEPALIVE) && ((pcb->state == ESTABLISHED) || (pcb->state == CLOSE_WAIT))) { + if((u32_t)(tcp_ticks - pcb->tmr) > (pcb->keepalive + TCP_MAXIDLE) / TCP_SLOW_INTERVAL) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: KEEPALIVE timeout. Aborting connection to %u.%u.%u.%u.\n", + ip4_addr1(&pcb->remote_ip), ip4_addr2(&pcb->remote_ip), + ip4_addr3(&pcb->remote_ip), ip4_addr4(&pcb->remote_ip))); + + tcp_abort(pcb); + } + else if((u32_t)(tcp_ticks - pcb->tmr) > (pcb->keepalive + pcb->keep_cnt * TCP_KEEPINTVL) / TCP_SLOW_INTERVAL) { + tcp_keepalive(pcb); + pcb->keep_cnt++; + } + } + + /* If this PCB has queued out of sequence data, but has been + inactive for too long, will drop the data (it will eventually + be retransmitted). */ +#if TCP_QUEUE_OOSEQ + if (pcb->ooseq != NULL && + (u32_t)tcp_ticks - pcb->tmr >= + pcb->rto * TCP_OOSEQ_TIMEOUT) { + tcp_segs_free(pcb->ooseq); + pcb->ooseq = NULL; + LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_slowtmr: dropping OOSEQ queued data\n")); + } +#endif /* TCP_QUEUE_OOSEQ */ + + /* Check if this PCB has stayed too long in SYN-RCVD */ + if (pcb->state == SYN_RCVD) { + if ((u32_t)(tcp_ticks - pcb->tmr) > + TCP_SYN_RCVD_TIMEOUT / TCP_SLOW_INTERVAL) { + ++pcb_remove; + LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: removing pcb stuck in SYN-RCVD\n")); + } + } + + + /* If the PCB should be removed, do it. */ + if (pcb_remove) { + tcp_pcb_purge(pcb); + /* Remove PCB from tcp_active_pcbs list. */ + if (prev != NULL) { + LWIP_ASSERT("tcp_slowtmr: middle tcp != tcp_active_pcbs", pcb != tcp_active_pcbs); + prev->next = pcb->next; + } else { + /* This PCB was the first. */ + LWIP_ASSERT("tcp_slowtmr: first pcb == tcp_active_pcbs", tcp_active_pcbs == pcb); + tcp_active_pcbs = pcb->next; + } + + TCP_EVENT_ERR(pcb->errf, pcb->callback_arg, ERR_ABRT); + + pcb2 = pcb->next; + memp_free(MEMP_TCP_PCB, pcb); + pcb = pcb2; + } else { + + /* We check if we should poll the connection. */ + ++pcb->polltmr; + if (pcb->polltmr >= pcb->pollinterval) { + pcb->polltmr = 0; + LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: polling application\n")); + TCP_EVENT_POLL(pcb, err); + if (err == ERR_OK) { + tcp_output(pcb); + } + } + + prev = pcb; + pcb = pcb->next; + } + } + + + /* Steps through all of the TIME-WAIT PCBs. */ + prev = NULL; + pcb = tcp_tw_pcbs; + while (pcb != NULL) { + LWIP_ASSERT("tcp_slowtmr: TIME-WAIT pcb->state == TIME-WAIT", pcb->state == TIME_WAIT); + pcb_remove = 0; + + /* Check if this PCB has stayed long enough in TIME-WAIT */ + if ((u32_t)(tcp_ticks - pcb->tmr) > 2 * TCP_MSL / TCP_SLOW_INTERVAL) { + ++pcb_remove; + } + + + + /* If the PCB should be removed, do it. */ + if (pcb_remove) { + tcp_pcb_purge(pcb); + /* Remove PCB from tcp_tw_pcbs list. */ + if (prev != NULL) { + LWIP_ASSERT("tcp_slowtmr: middle tcp != tcp_tw_pcbs", pcb != tcp_tw_pcbs); + prev->next = pcb->next; + } else { + /* This PCB was the first. */ + LWIP_ASSERT("tcp_slowtmr: first pcb == tcp_tw_pcbs", tcp_tw_pcbs == pcb); + tcp_tw_pcbs = pcb->next; + } + pcb2 = pcb->next; + memp_free(MEMP_TCP_PCB, pcb); + pcb = pcb2; + } else { + prev = pcb; + pcb = pcb->next; + } + } +} + +/** + * Is called every TCP_FAST_INTERVAL (250 ms) and sends delayed ACKs. + */ +void +tcp_fasttmr(void) +{ + struct tcp_pcb *pcb; + + /* send delayed ACKs */ + for(pcb = tcp_active_pcbs; pcb != NULL; pcb = pcb->next) { + if (pcb->flags & TF_ACK_DELAY) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_fasttmr: delayed ACK\n")); + tcp_ack_now(pcb); + pcb->flags &= ~(TF_ACK_DELAY | TF_ACK_NOW); + } + } +} + +/** + * Deallocates a list of TCP segments (tcp_seg structures). + * + */ +u8_t +tcp_segs_free(struct tcp_seg *seg) +{ + u8_t count = 0; + struct tcp_seg *next; + while (seg != NULL) { + next = seg->next; + count += tcp_seg_free(seg); + seg = next; + } + return count; +} + +/** + * Frees a TCP segment. + * + */ +u8_t +tcp_seg_free(struct tcp_seg *seg) +{ + u8_t count = 0; + + if (seg != NULL) { + if (seg->p != NULL) { + count = pbuf_free(seg->p); +#if TCP_DEBUG + seg->p = NULL; +#endif /* TCP_DEBUG */ + } + memp_free(MEMP_TCP_SEG, seg); + } + return count; +} + +/** + * Sets the priority of a connection. + * + */ +void +tcp_setprio(struct tcp_pcb *pcb, u8_t prio) +{ + pcb->prio = prio; +} +#if TCP_QUEUE_OOSEQ + +/** + * Returns a copy of the given TCP segment. + * + */ +struct tcp_seg * +tcp_seg_copy(struct tcp_seg *seg) +{ + struct tcp_seg *cseg; + + cseg = memp_malloc(MEMP_TCP_SEG); + if (cseg == NULL) { + return NULL; + } + memcpy((char *)cseg, (const char *)seg, sizeof(struct tcp_seg)); + pbuf_ref(cseg->p); + return cseg; +} +#endif + +#if LWIP_CALLBACK_API +static err_t +tcp_recv_null(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err) +{ + arg = arg; + if (p != NULL) { + pbuf_free(p); + } else if (err == ERR_OK) { + return tcp_close(pcb); + } + return ERR_OK; +} +#endif /* LWIP_CALLBACK_API */ + +static void +tcp_kill_prio(u8_t prio) +{ + struct tcp_pcb *pcb, *inactive; + u32_t inactivity; + u8_t mprio; + + + mprio = TCP_PRIO_MAX; + + /* We kill the oldest active connection that has lower priority than + prio. */ + inactivity = 0; + inactive = NULL; + for(pcb = tcp_active_pcbs; pcb != NULL; pcb = pcb->next) { + if (pcb->prio <= prio && + pcb->prio <= mprio && + (u32_t)(tcp_ticks - pcb->tmr) >= inactivity) { + inactivity = tcp_ticks - pcb->tmr; + inactive = pcb; + mprio = pcb->prio; + } + } + if (inactive != NULL) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_kill_prio: killing oldest PCB 0x%p (%ld)\n", + (void *)inactive, inactivity)); + tcp_abort(inactive); + } +} + + +static void +tcp_kill_timewait(void) +{ + struct tcp_pcb *pcb, *inactive; + u32_t inactivity; + + inactivity = 0; + inactive = NULL; + for(pcb = tcp_tw_pcbs; pcb != NULL; pcb = pcb->next) { + if ((u32_t)(tcp_ticks - pcb->tmr) >= inactivity) { + inactivity = tcp_ticks - pcb->tmr; + inactive = pcb; + } + } + if (inactive != NULL) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_kill_timewait: killing oldest TIME-WAIT PCB 0x%p (%ld)\n", + (void *)inactive, inactivity)); + tcp_abort(inactive); + } +} + + + +struct tcp_pcb * +tcp_alloc(u8_t prio) +{ + struct tcp_pcb *pcb; + u32_t iss; + + pcb = memp_malloc(MEMP_TCP_PCB); + if (pcb == NULL) { + /* Try killing oldest connection in TIME-WAIT. */ + LWIP_DEBUGF(TCP_DEBUG, ("tcp_alloc: killing off oldest TIME-WAIT connection\n")); + tcp_kill_timewait(); + pcb = memp_malloc(MEMP_TCP_PCB); + if (pcb == NULL) { + tcp_kill_prio(prio); + pcb = memp_malloc(MEMP_TCP_PCB); + } + } + if (pcb != NULL) { + memset(pcb, 0, sizeof(struct tcp_pcb)); + pcb->prio = TCP_PRIO_NORMAL; + pcb->snd_buf = TCP_SND_BUF; + pcb->snd_queuelen = 0; + pcb->rcv_wnd = TCP_WND; + pcb->tos = 0; + pcb->ttl = TCP_TTL; + pcb->mss = TCP_MSS; + pcb->rto = 3000 / TCP_SLOW_INTERVAL; + pcb->sa = 0; + pcb->sv = 3000 / TCP_SLOW_INTERVAL; + pcb->rtime = 0; + pcb->cwnd = 1; + iss = tcp_next_iss(); + pcb->snd_wl2 = iss; + pcb->snd_nxt = iss; + pcb->snd_max = iss; + pcb->lastack = iss; + pcb->snd_lbb = iss; + pcb->tmr = tcp_ticks; + + pcb->polltmr = 0; + +#if LWIP_CALLBACK_API + pcb->recv = tcp_recv_null; +#endif /* LWIP_CALLBACK_API */ + + /* Init KEEPALIVE timer */ + pcb->keepalive = TCP_KEEPDEFAULT; + pcb->keep_cnt = 0; + } + return pcb; +} + +/** + * Creates a new TCP protocol control block but doesn't place it on + * any of the TCP PCB lists. + * + * @internal: Maybe there should be a idle TCP PCB list where these + * PCBs are put on. We can then implement port reservation using + * tcp_bind(). Currently, we lack this (BSD socket type of) feature. + */ + +struct tcp_pcb * +tcp_new(void) +{ + return tcp_alloc(TCP_PRIO_NORMAL); +} + +/* + * tcp_arg(): + * + * Used to specify the argument that should be passed callback + * functions. + * + */ + +void +tcp_arg(struct tcp_pcb *pcb, void *arg) +{ + pcb->callback_arg = arg; +} +#if LWIP_CALLBACK_API + +/** + * Used to specify the function that should be called when a TCP + * connection receives data. + * + */ +void +tcp_recv(struct tcp_pcb *pcb, + err_t (* recv)(void *arg, struct tcp_pcb *tpcb, struct pbuf *p, err_t err)) +{ + pcb->recv = recv; +} + +/** + * Used to specify the function that should be called when TCP data + * has been successfully delivered to the remote host. + * + */ + +void +tcp_sent(struct tcp_pcb *pcb, + err_t (* sent)(void *arg, struct tcp_pcb *tpcb, u16_t len)) +{ + pcb->sent = sent; +} + +/** + * Used to specify the function that should be called when a fatal error + * has occured on the connection. + * + */ +void +tcp_err(struct tcp_pcb *pcb, + void (* errf)(void *arg, err_t err)) +{ + pcb->errf = errf; +} + +/** + * Used for specifying the function that should be called when a + * LISTENing connection has been connected to another host. + * + */ +void +tcp_accept(struct tcp_pcb *pcb, + err_t (* accept)(void *arg, struct tcp_pcb *newpcb, err_t err)) +{ + ((struct tcp_pcb_listen *)pcb)->accept = accept; +} +#endif /* LWIP_CALLBACK_API */ + + +/** + * Used to specify the function that should be called periodically + * from TCP. The interval is specified in terms of the TCP coarse + * timer interval, which is called twice a second. + * + */ +void +tcp_poll(struct tcp_pcb *pcb, + err_t (* poll)(void *arg, struct tcp_pcb *tpcb), u8_t interval) +{ +#if LWIP_CALLBACK_API + pcb->poll = poll; +#endif /* LWIP_CALLBACK_API */ + pcb->pollinterval = interval; +} + +/** + * Purges a TCP PCB. Removes any buffered data and frees the buffer memory. + * + */ +void +tcp_pcb_purge(struct tcp_pcb *pcb) +{ + if (pcb->state != CLOSED && + pcb->state != TIME_WAIT && + pcb->state != LISTEN) { + + LWIP_DEBUGF(TCP_DEBUG, ("tcp_pcb_purge\n")); + + if (pcb->unsent != NULL) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_pcb_purge: not all data sent\n")); + } + if (pcb->unacked != NULL) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_pcb_purge: data left on ->unacked\n")); + } +#if TCP_QUEUE_OOSEQ /* LW */ + if (pcb->ooseq != NULL) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_pcb_purge: data left on ->ooseq\n")); + } + + tcp_segs_free(pcb->ooseq); + pcb->ooseq = NULL; +#endif /* TCP_QUEUE_OOSEQ */ + tcp_segs_free(pcb->unsent); + tcp_segs_free(pcb->unacked); + pcb->unacked = pcb->unsent = NULL; + } +} + +/** + * Purges the PCB and removes it from a PCB list. Any delayed ACKs are sent first. + * + */ +void +tcp_pcb_remove(struct tcp_pcb **pcblist, struct tcp_pcb *pcb) +{ + TCP_RMV(pcblist, pcb); + + tcp_pcb_purge(pcb); + + /* if there is an outstanding delayed ACKs, send it */ + if (pcb->state != TIME_WAIT && + pcb->state != LISTEN && + pcb->flags & TF_ACK_DELAY) { + pcb->flags |= TF_ACK_NOW; + tcp_output(pcb); + } + pcb->state = CLOSED; + + LWIP_ASSERT("tcp_pcb_remove: tcp_pcbs_sane()", tcp_pcbs_sane()); +} + +/** + * Calculates a new initial sequence number for new connections. + * + */ +u32_t +tcp_next_iss(void) +{ + static u32_t iss = 6510; + + iss += tcp_ticks; /* XXX */ + return iss; +} + +#if TCP_DEBUG || TCP_INPUT_DEBUG || TCP_OUTPUT_DEBUG +void +tcp_debug_print(struct tcp_hdr *tcphdr) +{ + LWIP_DEBUGF(TCP_DEBUG, ("TCP header:\n")); + LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(TCP_DEBUG, ("| %5u | %5u | (src port, dest port)\n", + ntohs(tcphdr->src), ntohs(tcphdr->dest))); + LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(TCP_DEBUG, ("| %010lu | (seq no)\n", + ntohl(tcphdr->seqno))); + LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(TCP_DEBUG, ("| %010lu | (ack no)\n", + ntohl(tcphdr->ackno))); + LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(TCP_DEBUG, ("| %2u | |%u%u%u%u%u%u| %5u | (hdrlen, flags (", + TCPH_HDRLEN(tcphdr), + TCPH_FLAGS(tcphdr) >> 5 & 1, + TCPH_FLAGS(tcphdr) >> 4 & 1, + TCPH_FLAGS(tcphdr) >> 3 & 1, + TCPH_FLAGS(tcphdr) >> 2 & 1, + TCPH_FLAGS(tcphdr) >> 1 & 1, + TCPH_FLAGS(tcphdr) & 1, + ntohs(tcphdr->wnd))); + tcp_debug_print_flags(TCPH_FLAGS(tcphdr)); + LWIP_DEBUGF(TCP_DEBUG, ("), win)\n")); + LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(TCP_DEBUG, ("| 0x%04x | %5u | (chksum, urgp)\n", + ntohs(tcphdr->chksum), ntohs(tcphdr->urgp))); + LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n")); +} + +void +tcp_debug_print_state(enum tcp_state s) +{ + LWIP_DEBUGF(TCP_DEBUG, ("State: ")); + switch (s) { + case CLOSED: + LWIP_DEBUGF(TCP_DEBUG, ("CLOSED\n")); + break; + case LISTEN: + LWIP_DEBUGF(TCP_DEBUG, ("LISTEN\n")); + break; + case SYN_SENT: + LWIP_DEBUGF(TCP_DEBUG, ("SYN_SENT\n")); + break; + case SYN_RCVD: + LWIP_DEBUGF(TCP_DEBUG, ("SYN_RCVD\n")); + break; + case ESTABLISHED: + LWIP_DEBUGF(TCP_DEBUG, ("ESTABLISHED\n")); + break; + case FIN_WAIT_1: + LWIP_DEBUGF(TCP_DEBUG, ("FIN_WAIT_1\n")); + break; + case FIN_WAIT_2: + LWIP_DEBUGF(TCP_DEBUG, ("FIN_WAIT_2\n")); + break; + case CLOSE_WAIT: + LWIP_DEBUGF(TCP_DEBUG, ("CLOSE_WAIT\n")); + break; + case CLOSING: + LWIP_DEBUGF(TCP_DEBUG, ("CLOSING\n")); + break; + case LAST_ACK: + LWIP_DEBUGF(TCP_DEBUG, ("LAST_ACK\n")); + break; + case TIME_WAIT: + LWIP_DEBUGF(TCP_DEBUG, ("TIME_WAIT\n")); + break; + } +} + +void +tcp_debug_print_flags(u8_t flags) +{ + if (flags & TCP_FIN) { + LWIP_DEBUGF(TCP_DEBUG, ("FIN ")); + } + if (flags & TCP_SYN) { + LWIP_DEBUGF(TCP_DEBUG, ("SYN ")); + } + if (flags & TCP_RST) { + LWIP_DEBUGF(TCP_DEBUG, ("RST ")); + } + if (flags & TCP_PSH) { + LWIP_DEBUGF(TCP_DEBUG, ("PSH ")); + } + if (flags & TCP_ACK) { + LWIP_DEBUGF(TCP_DEBUG, ("ACK ")); + } + if (flags & TCP_URG) { + LWIP_DEBUGF(TCP_DEBUG, ("URG ")); + } + if (flags & TCP_ECE) { + LWIP_DEBUGF(TCP_DEBUG, ("ECE ")); + } + if (flags & TCP_CWR) { + LWIP_DEBUGF(TCP_DEBUG, ("CWR ")); + } +} + +void +tcp_debug_print_pcbs(void) +{ + struct tcp_pcb *pcb; + LWIP_DEBUGF(TCP_DEBUG, ("Active PCB states:\n")); + for(pcb = tcp_active_pcbs; pcb != NULL; pcb = pcb->next) { + LWIP_DEBUGF(TCP_DEBUG, ("Local port %u, foreign port %u snd_nxt %lu rcv_nxt %lu ", + pcb->local_port, pcb->remote_port, + pcb->snd_nxt, pcb->rcv_nxt)); + tcp_debug_print_state(pcb->state); + } + LWIP_DEBUGF(TCP_DEBUG, ("Listen PCB states:\n")); + for(pcb = (struct tcp_pcb *)tcp_listen_pcbs.pcbs; pcb != NULL; pcb = pcb->next) { + LWIP_DEBUGF(TCP_DEBUG, ("Local port %u, foreign port %u snd_nxt %lu rcv_nxt %lu ", + pcb->local_port, pcb->remote_port, + pcb->snd_nxt, pcb->rcv_nxt)); + tcp_debug_print_state(pcb->state); + } + LWIP_DEBUGF(TCP_DEBUG, ("TIME-WAIT PCB states:\n")); + for(pcb = tcp_tw_pcbs; pcb != NULL; pcb = pcb->next) { + LWIP_DEBUGF(TCP_DEBUG, ("Local port %u, foreign port %u snd_nxt %lu rcv_nxt %lu ", + pcb->local_port, pcb->remote_port, + pcb->snd_nxt, pcb->rcv_nxt)); + tcp_debug_print_state(pcb->state); + } +} + +int +tcp_pcbs_sane(void) +{ + struct tcp_pcb *pcb; + for(pcb = tcp_active_pcbs; pcb != NULL; pcb = pcb->next) { + LWIP_ASSERT("tcp_pcbs_sane: active pcb->state != CLOSED", pcb->state != CLOSED); + LWIP_ASSERT("tcp_pcbs_sane: active pcb->state != LISTEN", pcb->state != LISTEN); + LWIP_ASSERT("tcp_pcbs_sane: active pcb->state != TIME-WAIT", pcb->state != TIME_WAIT); + } + for(pcb = tcp_tw_pcbs; pcb != NULL; pcb = pcb->next) { + LWIP_ASSERT("tcp_pcbs_sane: tw pcb->state == TIME-WAIT", pcb->state == TIME_WAIT); + } + return 1; +} +#endif /* TCP_DEBUG */ +#endif /* LWIP_TCP */ + + + + + + + + + +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/core/tcp_in.c @@ -0,0 +1,1210 @@ +/** + * @file + * + * Transmission Control Protocol, incoming traffic + * + * The input processing functions of TCP. + * + * These functions are generally called in the order (ip_input() ->) tcp_input() -> + * tcp_process() -> tcp_receive() (-> application). + * + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + +#include "lwip/def.h" +#include "lwip/opt.h" + +#include "lwip/ip_addr.h" +#include "lwip/netif.h" +#include "lwip/mem.h" +#include "lwip/memp.h" + +#include "lwip/inet.h" +#include "lwip/tcp.h" + +#include "lwip/stats.h" + +#include "arch/perf.h" +#if LWIP_TCP +/* These variables are global to all functions involved in the input + processing of TCP segments. They are set by the tcp_input() + function. */ +static struct tcp_seg inseg; +static struct tcp_hdr *tcphdr; +static struct ip_hdr *iphdr; +static u32_t seqno, ackno; +static u8_t flags; +static u16_t tcplen; + +static u8_t recv_flags; +static struct pbuf *recv_data; + +struct tcp_pcb *tcp_input_pcb; + +/* Forward declarations. */ +static err_t tcp_process(struct tcp_pcb *pcb); +static void tcp_receive(struct tcp_pcb *pcb); +static void tcp_parseopt(struct tcp_pcb *pcb); + +static err_t tcp_listen_input(struct tcp_pcb_listen *pcb); +static err_t tcp_timewait_input(struct tcp_pcb *pcb); + + +/* tcp_input: + * + * The initial input processing of TCP. It verifies the TCP header, demultiplexes + * the segment between the PCBs and passes it on to tcp_process(), which implements + * the TCP finite state machine. This function is called by the IP layer (in + * ip_input()). + */ + +void +tcp_input(struct pbuf *p, struct netif *inp) +{ + struct tcp_pcb *pcb, *prev; + struct tcp_pcb_listen *lpcb; + u8_t hdrlen; + err_t err; + +#if SO_REUSE + struct tcp_pcb *pcb_temp; + int reuse = 0; + int reuse_port = 0; +#endif /* SO_REUSE */ + + PERF_START; + + TCP_STATS_INC(tcp.recv); + + iphdr = p->payload; + tcphdr = (struct tcp_hdr *)((u8_t *)p->payload + IPH_HL(iphdr) * 4); + +#if TCP_INPUT_DEBUG + tcp_debug_print(tcphdr); +#endif + + /* remove header from payload */ + if (pbuf_header(p, -((s16_t)(IPH_HL(iphdr) * 4))) || (p->tot_len < sizeof(struct tcp_hdr))) { + /* drop short packets */ + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: short packet (%u bytes) discarded\n", p->tot_len)); + TCP_STATS_INC(tcp.lenerr); + TCP_STATS_INC(tcp.drop); + pbuf_free(p); + return; + } + + /* Don't even process incoming broadcasts/multicasts. */ + if (ip_addr_isbroadcast(&(iphdr->dest), inp) || + ip_addr_ismulticast(&(iphdr->dest))) { + pbuf_free(p); + return; + } + +#if CHECKSUM_CHECK_TCP + /* Verify TCP checksum. */ + if (inet_chksum_pseudo(p, (struct ip_addr *)&(iphdr->src), + (struct ip_addr *)&(iphdr->dest), + IP_PROTO_TCP, p->tot_len) != 0) { + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: packet discarded due to failing checksum 0x%04x\n", + inet_chksum_pseudo(p, (struct ip_addr *)&(iphdr->src), (struct ip_addr *)&(iphdr->dest), + IP_PROTO_TCP, p->tot_len))); +#if TCP_DEBUG + tcp_debug_print(tcphdr); +#endif /* TCP_DEBUG */ + TCP_STATS_INC(tcp.chkerr); + TCP_STATS_INC(tcp.drop); + + pbuf_free(p); + return; + } +#endif + + /* Move the payload pointer in the pbuf so that it points to the + TCP data instead of the TCP header. */ + hdrlen = TCPH_HDRLEN(tcphdr); + pbuf_header(p, -(hdrlen * 4)); + + /* Convert fields in TCP header to host byte order. */ + tcphdr->src = ntohs(tcphdr->src); + tcphdr->dest = ntohs(tcphdr->dest); + seqno = tcphdr->seqno = ntohl(tcphdr->seqno); + ackno = tcphdr->ackno = ntohl(tcphdr->ackno); + tcphdr->wnd = ntohs(tcphdr->wnd); + + flags = TCPH_FLAGS(tcphdr) & TCP_FLAGS; + tcplen = p->tot_len + ((flags & TCP_FIN || flags & TCP_SYN)? 1: 0); + + /* Demultiplex an incoming segment. First, we check if it is destined + for an active connection. */ + prev = NULL; + +#if SO_REUSE + pcb_temp = tcp_active_pcbs; + + again_1: + + /* Iterate through the TCP pcb list for a fully matching pcb */ + for(pcb = pcb_temp; pcb != NULL; pcb = pcb->next) { +#else /* SO_REUSE */ + for(pcb = tcp_active_pcbs; pcb != NULL; pcb = pcb->next) { +#endif /* SO_REUSE */ + LWIP_ASSERT("tcp_input: active pcb->state != CLOSED", pcb->state != CLOSED); + LWIP_ASSERT("tcp_input: active pcb->state != TIME-WAIT", pcb->state != TIME_WAIT); + LWIP_ASSERT("tcp_input: active pcb->state != LISTEN", pcb->state != LISTEN); + if (pcb->remote_port == tcphdr->src && + pcb->local_port == tcphdr->dest && + ip_addr_cmp(&(pcb->remote_ip), &(iphdr->src)) && + ip_addr_cmp(&(pcb->local_ip), &(iphdr->dest))) { + +#if SO_REUSE + if(pcb->so_options & SOF_REUSEPORT) { + if(reuse) { + /* We processed one PCB already */ + LWIP_DEBUGF(TCP_INPUT_DEBUG,("tcp_input: second or later PCB and SOF_REUSEPORT set.\n")); + } else { + /* First PCB with this address */ + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: first PCB and SOF_REUSEPORT set.\n")); + reuse = 1; + } + + reuse_port = 1; + p->ref++; + + /* We want to search on next socket after receiving */ + pcb_temp = pcb->next; + + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: reference counter on PBUF set to %i\n", p->ref)); + } else { + if(reuse) { + /* We processed one PCB already */ + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: second or later PCB but SOF_REUSEPORT not set !\n")); + } + } +#endif /* SO_REUSE */ + + /* Move this PCB to the front of the list so that subsequent + lookups will be faster (we exploit locality in TCP segment + arrivals). */ + LWIP_ASSERT("tcp_input: pcb->next != pcb (before cache)", pcb->next != pcb); + if (prev != NULL) { + prev->next = pcb->next; + pcb->next = tcp_active_pcbs; + tcp_active_pcbs = pcb; + } + LWIP_ASSERT("tcp_input: pcb->next != pcb (after cache)", pcb->next != pcb); + break; + } + prev = pcb; + } + + if (pcb == NULL) { + /* If it did not go to an active connection, we check the connections + in the TIME-WAIT state. */ + + for(pcb = tcp_tw_pcbs; pcb != NULL; pcb = pcb->next) { + LWIP_ASSERT("tcp_input: TIME-WAIT pcb->state == TIME-WAIT", pcb->state == TIME_WAIT); + if (pcb->remote_port == tcphdr->src && + pcb->local_port == tcphdr->dest && + ip_addr_cmp(&(pcb->remote_ip), &(iphdr->src)) && + ip_addr_cmp(&(pcb->local_ip), &(iphdr->dest))) { + /* We don't really care enough to move this PCB to the front + of the list since we are not very likely to receive that + many segments for connections in TIME-WAIT. */ + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: packed for TIME_WAITing connection.\n")); + tcp_timewait_input(pcb); + pbuf_free(p); + return; + } + } + + /* Finally, if we still did not get a match, we check all PCBs that + are LISTENing for incoming connections. */ + prev = NULL; + for(lpcb = tcp_listen_pcbs.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) { + if ((ip_addr_isany(&(lpcb->local_ip)) || + ip_addr_cmp(&(lpcb->local_ip), &(iphdr->dest))) && + lpcb->local_port == tcphdr->dest) { + /* Move this PCB to the front of the list so that subsequent + lookups will be faster (we exploit locality in TCP segment + arrivals). */ + if (prev != NULL) { + ((struct tcp_pcb_listen *)prev)->next = lpcb->next; + /* our successor is the remainder of the listening list */ + lpcb->next = tcp_listen_pcbs.listen_pcbs; + /* put this listening pcb at the head of the listening list */ + tcp_listen_pcbs.listen_pcbs = lpcb; + } + + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: packed for LISTENing connection.\n")); + tcp_listen_input(lpcb); + pbuf_free(p); + return; + } + prev = (struct tcp_pcb *)lpcb; + } + } + +#if TCP_INPUT_DEBUG + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("+-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags ")); + tcp_debug_print_flags(TCPH_FLAGS(tcphdr)); + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("-+-+-+-+-+-+-+-+-+-+-+-+-+-+\n")); +#endif /* TCP_INPUT_DEBUG */ + + + if (pcb != NULL) { + /* The incoming segment belongs to a connection. */ +#if TCP_INPUT_DEBUG +#if TCP_DEBUG + tcp_debug_print_state(pcb->state); +#endif /* TCP_DEBUG */ +#endif /* TCP_INPUT_DEBUG */ + + /* Set up a tcp_seg structure. */ + inseg.next = NULL; + inseg.len = p->tot_len; + inseg.dataptr = p->payload; + inseg.p = p; + inseg.tcphdr = tcphdr; + + recv_data = NULL; + recv_flags = 0; + + tcp_input_pcb = pcb; + err = tcp_process(pcb); + tcp_input_pcb = NULL; + /* A return value of ERR_ABRT means that tcp_abort() was called + and that the pcb has been freed. If so, we don't do anything. */ + if (err != ERR_ABRT) { + if (recv_flags & TF_RESET) { + /* TF_RESET means that the connection was reset by the other + end. We then call the error callback to inform the + application that the connection is dead before we + deallocate the PCB. */ + TCP_EVENT_ERR(pcb->errf, pcb->callback_arg, ERR_RST); + tcp_pcb_remove(&tcp_active_pcbs, pcb); + memp_free(MEMP_TCP_PCB, pcb); + } else if (recv_flags & TF_CLOSED) { + /* The connection has been closed and we will deallocate the + PCB. */ + tcp_pcb_remove(&tcp_active_pcbs, pcb); + memp_free(MEMP_TCP_PCB, pcb); + } else { + err = ERR_OK; + /* If the application has registered a "sent" function to be + called when new send buffer space is available, we call it + now. */ + if (pcb->acked > 0) { + TCP_EVENT_SENT(pcb, pcb->acked, err); + } + + if (recv_data != NULL) { + /* Notify application that data has been received. */ + TCP_EVENT_RECV(pcb, recv_data, ERR_OK, err); + } + + /* If a FIN segment was received, we call the callback + function with a NULL buffer to indicate EOF. */ + if (recv_flags & TF_GOT_FIN) { + TCP_EVENT_RECV(pcb, NULL, ERR_OK, err); + } + /* If there were no errors, we try to send something out. */ + if (err == ERR_OK) { + tcp_output(pcb); + } + } + } + + + /* We deallocate the incoming pbuf. If it was buffered by the + application, the application should have called pbuf_ref() to + increase the reference counter in the pbuf. If so, the buffer + isn't actually deallocated by the call to pbuf_free(), only the + reference count is decreased. */ + pbuf_free(inseg.p); +#if TCP_INPUT_DEBUG +#if TCP_DEBUG + tcp_debug_print_state(pcb->state); +#endif /* TCP_DEBUG */ +#endif /* TCP_INPUT_DEBUG */ +#if SO_REUSE + /* First socket should receive now */ + if(reuse_port) { + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: searching next PCB.\n")); + reuse_port = 0; + + /* We are searching connected sockets */ + goto again_1; + } +#endif /* SO_REUSE */ + + } else { +#if SO_REUSE + if(reuse) { + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: freeing PBUF with reference counter set to %i\n", p->ref)); + pbuf_free(p); + goto end; + } +#endif /* SO_REUSE */ + /* If no matching PCB was found, send a TCP RST (reset) to the + sender. */ + LWIP_DEBUGF(TCP_RST_DEBUG, ("tcp_input: no PCB match found, resetting.\n")); + if (!(TCPH_FLAGS(tcphdr) & TCP_RST)) { + TCP_STATS_INC(tcp.proterr); + TCP_STATS_INC(tcp.drop); + tcp_rst(ackno, seqno + tcplen, + &(iphdr->dest), &(iphdr->src), + tcphdr->dest, tcphdr->src); + } + pbuf_free(p); + } +#if SO_REUSE + end: +#endif /* SO_REUSE */ + LWIP_ASSERT("tcp_input: tcp_pcbs_sane()", tcp_pcbs_sane()); + PERF_STOP("tcp_input"); +} + +/* tcp_listen_input(): + * + * Called by tcp_input() when a segment arrives for a listening + * connection. + */ + +static err_t +tcp_listen_input(struct tcp_pcb_listen *pcb) +{ + struct tcp_pcb *npcb; + u32_t optdata; + + /* In the LISTEN state, we check for incoming SYN segments, + creates a new PCB, and responds with a SYN|ACK. */ + if (flags & TCP_ACK) { + /* For incoming segments with the ACK flag set, respond with a + RST. */ + LWIP_DEBUGF(TCP_RST_DEBUG, ("tcp_listen_input: ACK in LISTEN, sending reset\n")); + tcp_rst(ackno + 1, seqno + tcplen, + &(iphdr->dest), &(iphdr->src), + tcphdr->dest, tcphdr->src); + } else if (flags & TCP_SYN) { + LWIP_DEBUGF(TCP_DEBUG, ("TCP connection request %u -> %u.\n", tcphdr->src, tcphdr->dest)); + npcb = tcp_alloc(pcb->prio); + /* If a new PCB could not be created (probably due to lack of memory), + we don't do anything, but rely on the sender will retransmit the + SYN at a time when we have more memory available. */ + if (npcb == NULL) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_listen_input: could not allocate PCB\n")); + TCP_STATS_INC(tcp.memerr); + return ERR_MEM; + } + /* Set up the new PCB. */ + ip_addr_set(&(npcb->local_ip), &(iphdr->dest)); + npcb->local_port = pcb->local_port; + ip_addr_set(&(npcb->remote_ip), &(iphdr->src)); + npcb->remote_port = tcphdr->src; + npcb->state = SYN_RCVD; + npcb->rcv_nxt = seqno + 1; + npcb->snd_wnd = tcphdr->wnd; + npcb->ssthresh = npcb->snd_wnd; + npcb->snd_wl1 = seqno - 1;/* initialise to seqno-1 to force window update */ + npcb->callback_arg = pcb->callback_arg; +#if LWIP_CALLBACK_API + npcb->accept = pcb->accept; +#endif /* LWIP_CALLBACK_API */ + /* inherit socket options */ + npcb->so_options = pcb->so_options & (SOF_DEBUG|SOF_DONTROUTE|SOF_KEEPALIVE|SOF_OOBINLINE|SOF_LINGER); + /* Register the new PCB so that we can begin receiving segments + for it. */ + TCP_REG(&tcp_active_pcbs, npcb); + + /* Parse any options in the SYN. */ + tcp_parseopt(npcb); + + /* Build an MSS option. */ + optdata = htonl(((u32_t)2 << 24) | + ((u32_t)4 << 16) | + (((u32_t)npcb->mss / 256) << 8) | + (npcb->mss & 255)); + /* Send a SYN|ACK together with the MSS option. */ + tcp_enqueue(npcb, NULL, 0, TCP_SYN | TCP_ACK, 0, (u8_t *)&optdata, 4); + return tcp_output(npcb); + } + return ERR_OK; +} + +/* tcp_timewait_input(): + * + * Called by tcp_input() when a segment arrives for a connection in + * TIME_WAIT. + */ + +static err_t +tcp_timewait_input(struct tcp_pcb *pcb) +{ + if (TCP_SEQ_GT(seqno + tcplen, pcb->rcv_nxt)) { + pcb->rcv_nxt = seqno + tcplen; + } + if (tcplen > 0) { + tcp_ack_now(pcb); + } + return tcp_output(pcb); +} + +/* tcp_process + * + * Implements the TCP state machine. Called by tcp_input. In some + * states tcp_receive() is called to receive data. The tcp_seg + * argument will be freed by the caller (tcp_input()) unless the + * recv_data pointer in the pcb is set. + */ + +static err_t +tcp_process(struct tcp_pcb *pcb) +{ + struct tcp_seg *rseg; + u8_t acceptable = 0; + err_t err; + + + err = ERR_OK; + + /* Process incoming RST segments. */ + if (flags & TCP_RST) { + /* First, determine if the reset is acceptable. */ + if (pcb->state == SYN_SENT) { + if (ackno == pcb->snd_nxt) { + acceptable = 1; + } + } else { + if (TCP_SEQ_GEQ(seqno, pcb->rcv_nxt) && + TCP_SEQ_LEQ(seqno, pcb->rcv_nxt + pcb->rcv_wnd)) { + acceptable = 1; + } + } + + if (acceptable) { + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_process: Connection RESET\n")); + LWIP_ASSERT("tcp_input: pcb->state != CLOSED", pcb->state != CLOSED); + recv_flags = TF_RESET; + pcb->flags &= ~TF_ACK_DELAY; + return ERR_RST; + } else { + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_process: unacceptable reset seqno %lu rcv_nxt %lu\n", + seqno, pcb->rcv_nxt)); + LWIP_DEBUGF(TCP_DEBUG, ("tcp_process: unacceptable reset seqno %lu rcv_nxt %lu\n", + seqno, pcb->rcv_nxt)); + return ERR_OK; + } + } + + /* Update the PCB (in)activity timer. */ + pcb->tmr = tcp_ticks; + pcb->keep_cnt = 0; + + /* Do different things depending on the TCP state. */ + switch (pcb->state) { + case SYN_SENT: + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("SYN-SENT: ackno %lu pcb->snd_nxt %lu unacked %lu\n", ackno, + pcb->snd_nxt, ntohl(pcb->unacked->tcphdr->seqno))); + if ((flags & TCP_ACK) && (flags & TCP_SYN) + && ackno == ntohl(pcb->unacked->tcphdr->seqno) + 1) { + pcb->rcv_nxt = seqno + 1; + pcb->lastack = ackno; + pcb->snd_wnd = tcphdr->wnd; + pcb->snd_wl1 = seqno - 1; /* initialise to seqno - 1 to force window update */ + pcb->state = ESTABLISHED; + pcb->cwnd = pcb->mss; + --pcb->snd_queuelen; + LWIP_DEBUGF(TCP_QLEN_DEBUG, ("tcp_process: SYN-SENT --queuelen %u\n", (unsigned int)pcb->snd_queuelen)); + rseg = pcb->unacked; + pcb->unacked = rseg->next; + tcp_seg_free(rseg); + + /* Parse any options in the SYNACK. */ + tcp_parseopt(pcb); + + /* Call the user specified function to call when sucessfully + * connected. */ + TCP_EVENT_CONNECTED(pcb, ERR_OK, err); + tcp_ack(pcb); + } + break; + case SYN_RCVD: + if (flags & TCP_ACK && + !(flags & TCP_RST)) { + if (TCP_SEQ_LT(pcb->lastack, ackno) && + TCP_SEQ_LEQ(ackno, pcb->snd_nxt)) { + pcb->state = ESTABLISHED; + LWIP_DEBUGF(TCP_DEBUG, ("TCP connection established %u -> %u.\n", inseg.tcphdr->src, inseg.tcphdr->dest)); +#if LWIP_CALLBACK_API + LWIP_ASSERT("pcb->accept != NULL", pcb->accept != NULL); +#endif + /* Call the accept function. */ + TCP_EVENT_ACCEPT(pcb, ERR_OK, err); + if (err != ERR_OK) { + /* If the accept function returns with an error, we abort + * the connection. */ + tcp_abort(pcb); + return ERR_ABRT; + } + /* If there was any data contained within this ACK, + * we'd better pass it on to the application as well. */ + tcp_receive(pcb); + pcb->cwnd = pcb->mss; + } + } + break; + case CLOSE_WAIT: + /* FALLTHROUGH */ + case ESTABLISHED: + tcp_receive(pcb); + if (flags & TCP_FIN) { + tcp_ack_now(pcb); + pcb->state = CLOSE_WAIT; + } + break; + case FIN_WAIT_1: + tcp_receive(pcb); + if (flags & TCP_FIN) { + if (flags & TCP_ACK && ackno == pcb->snd_nxt) { + LWIP_DEBUGF(TCP_DEBUG, + ("TCP connection closed %d -> %d.\n", inseg.tcphdr->src, inseg.tcphdr->dest)); + tcp_ack_now(pcb); + tcp_pcb_purge(pcb); + TCP_RMV(&tcp_active_pcbs, pcb); + pcb->state = TIME_WAIT; + TCP_REG(&tcp_tw_pcbs, pcb); + } else { + tcp_ack_now(pcb); + pcb->state = CLOSING; + } + } else if (flags & TCP_ACK && ackno == pcb->snd_nxt) { + pcb->state = FIN_WAIT_2; + } + break; + case FIN_WAIT_2: + tcp_receive(pcb); + if (flags & TCP_FIN) { + LWIP_DEBUGF(TCP_DEBUG, ("TCP connection closed %u -> %u.\n", inseg.tcphdr->src, inseg.tcphdr->dest)); + tcp_ack_now(pcb); + tcp_pcb_purge(pcb); + TCP_RMV(&tcp_active_pcbs, pcb); + pcb->state = TIME_WAIT; + TCP_REG(&tcp_tw_pcbs, pcb); + } + break; + case CLOSING: + tcp_receive(pcb); + if (flags & TCP_ACK && ackno == pcb->snd_nxt) { + LWIP_DEBUGF(TCP_DEBUG, ("TCP connection closed %u -> %u.\n", inseg.tcphdr->src, inseg.tcphdr->dest)); + tcp_ack_now(pcb); + tcp_pcb_purge(pcb); + TCP_RMV(&tcp_active_pcbs, pcb); + pcb->state = TIME_WAIT; + TCP_REG(&tcp_tw_pcbs, pcb); + } + break; + case LAST_ACK: + tcp_receive(pcb); + if (flags & TCP_ACK && ackno == pcb->snd_nxt) { + LWIP_DEBUGF(TCP_DEBUG, ("TCP connection closed %u -> %u.\n", inseg.tcphdr->src, inseg.tcphdr->dest)); + pcb->state = CLOSED; + recv_flags = TF_CLOSED; + } + break; + default: + break; + } + + return ERR_OK; +} + +/* tcp_receive: + * + * Called by tcp_process. Checks if the given segment is an ACK for outstanding + * data, and if so frees the memory of the buffered data. Next, is places the + * segment on any of the receive queues (pcb->recved or pcb->ooseq). If the segment + * is buffered, the pbuf is referenced by pbuf_ref so that it will not be freed until + * i it has been removed from the buffer. + * + * If the incoming segment constitutes an ACK for a segment that was used for RTT + * estimation, the RTT is estimated here as well. + */ + +static void +tcp_receive(struct tcp_pcb *pcb) +{ + struct tcp_seg *next; +#if TCP_QUEUE_OOSEQ + struct tcp_seg *prev, *cseg; +#endif + struct pbuf *p; + s32_t off; + int m; + u32_t right_wnd_edge; + + + if (flags & TCP_ACK) { + right_wnd_edge = pcb->snd_wnd + pcb->snd_wl1; + + /* Update window. */ + if (TCP_SEQ_LT(pcb->snd_wl1, seqno) || + (pcb->snd_wl1 == seqno && TCP_SEQ_LT(pcb->snd_wl2, ackno)) || + (pcb->snd_wl2 == ackno && tcphdr->wnd > pcb->snd_wnd)) { + pcb->snd_wnd = tcphdr->wnd; + pcb->snd_wl1 = seqno; + pcb->snd_wl2 = ackno; + LWIP_DEBUGF(TCP_WND_DEBUG, ("tcp_receive: window update %lu\n", pcb->snd_wnd)); +#if TCP_WND_DEBUG + } else { + if (pcb->snd_wnd != tcphdr->wnd) { + LWIP_DEBUGF(TCP_WND_DEBUG, ("tcp_receive: no window update lastack %lu snd_max %lu ackno %lu wl1 %lu seqno %lu wl2 %lu\n", + pcb->lastack, pcb->snd_max, ackno, pcb->snd_wl1, seqno, pcb->snd_wl2)); + } +#endif /* TCP_WND_DEBUG */ + } + + + if (pcb->lastack == ackno) { + pcb->acked = 0; + + if (pcb->snd_wl1 + pcb->snd_wnd == right_wnd_edge){ + ++pcb->dupacks; + if (pcb->dupacks >= 3 && pcb->unacked != NULL) { + if (!(pcb->flags & TF_INFR)) { + /* This is fast retransmit. Retransmit the first unacked segment. */ + LWIP_DEBUGF(TCP_FR_DEBUG, ("tcp_receive: dupacks %u (%lu), fast retransmit %lu\n", + (unsigned int)pcb->dupacks, pcb->lastack, + ntohl(pcb->unacked->tcphdr->seqno))); + tcp_rexmit(pcb); + /* Set ssthresh to max (FlightSize / 2, 2*SMSS) */ + pcb->ssthresh = LWIP_MAX((pcb->snd_max - + pcb->lastack) / 2, + 2 * pcb->mss); + + pcb->cwnd = pcb->ssthresh + 3 * pcb->mss; + pcb->flags |= TF_INFR; + } else { + /* Inflate the congestion window, but not if it means that + the value overflows. */ + if ((u16_t)(pcb->cwnd + pcb->mss) > pcb->cwnd) { + pcb->cwnd += pcb->mss; + } + } + } + } else { + LWIP_DEBUGF(TCP_FR_DEBUG, ("tcp_receive: dupack averted %lu %lu\n", + pcb->snd_wl1 + pcb->snd_wnd, right_wnd_edge)); + } + } else if (TCP_SEQ_LT(pcb->lastack, ackno) && + TCP_SEQ_LEQ(ackno, pcb->snd_max)) { + /* We come here when the ACK acknowledges new data. */ + + /* Reset the "IN Fast Retransmit" flag, since we are no longer + in fast retransmit. Also reset the congestion window to the + slow start threshold. */ + if (pcb->flags & TF_INFR) { + pcb->flags &= ~TF_INFR; + pcb->cwnd = pcb->ssthresh; + } + + /* Reset the number of retransmissions. */ + pcb->nrtx = 0; + + /* Reset the retransmission time-out. */ + pcb->rto = (pcb->sa >> 3) + pcb->sv; + + /* Update the send buffer space. */ + pcb->acked = ackno - pcb->lastack; + pcb->snd_buf += pcb->acked; + + /* Reset the fast retransmit variables. */ + pcb->dupacks = 0; + pcb->lastack = ackno; + + /* Update the congestion control variables (cwnd and + ssthresh). */ + if (pcb->state >= ESTABLISHED) { + if (pcb->cwnd < pcb->ssthresh) { + if ((u16_t)(pcb->cwnd + pcb->mss) > pcb->cwnd) { + pcb->cwnd += pcb->mss; + } + LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_receive: slow start cwnd %u\n", pcb->cwnd)); + } else { + u16_t new_cwnd = (pcb->cwnd + pcb->mss * pcb->mss / pcb->cwnd); + if (new_cwnd > pcb->cwnd) { + pcb->cwnd = new_cwnd; + } + LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_receive: congestion avoidance cwnd %u\n", pcb->cwnd)); + } + } + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_receive: ACK for %lu, unacked->seqno %lu:%lu\n", + ackno, + pcb->unacked != NULL? + ntohl(pcb->unacked->tcphdr->seqno): 0, + pcb->unacked != NULL? + ntohl(pcb->unacked->tcphdr->seqno) + TCP_TCPLEN(pcb->unacked): 0)); + + /* Remove segment from the unacknowledged list if the incoming + ACK acknowlegdes them. */ + while (pcb->unacked != NULL && + TCP_SEQ_LEQ(ntohl(pcb->unacked->tcphdr->seqno) + + TCP_TCPLEN(pcb->unacked), ackno)) { + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_receive: removing %lu:%lu from pcb->unacked\n", + ntohl(pcb->unacked->tcphdr->seqno), + ntohl(pcb->unacked->tcphdr->seqno) + + TCP_TCPLEN(pcb->unacked))); + + next = pcb->unacked; + pcb->unacked = pcb->unacked->next; + + LWIP_DEBUGF(TCP_QLEN_DEBUG, ("tcp_receive: queuelen %u ... ", (unsigned int)pcb->snd_queuelen)); + pcb->snd_queuelen -= pbuf_clen(next->p); + tcp_seg_free(next); + + LWIP_DEBUGF(TCP_QLEN_DEBUG, ("%u (after freeing unacked)\n", (unsigned int)pcb->snd_queuelen)); + if (pcb->snd_queuelen != 0) { + LWIP_ASSERT("tcp_receive: valid queue length", pcb->unacked != NULL || + pcb->unsent != NULL); + } + } + pcb->polltmr = 0; + } + + /* We go through the ->unsent list to see if any of the segments + on the list are acknowledged by the ACK. This may seem + strange since an "unsent" segment shouldn't be acked. The + rationale is that lwIP puts all outstanding segments on the + ->unsent list after a retransmission, so these segments may + in fact have been sent once. */ + while (pcb->unsent != NULL && + TCP_SEQ_LEQ(ntohl(pcb->unsent->tcphdr->seqno) + TCP_TCPLEN(pcb->unsent), + ackno) && + TCP_SEQ_LEQ(ackno, pcb->snd_max)) { + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_receive: removing %lu:%lu from pcb->unsent\n", + ntohl(pcb->unsent->tcphdr->seqno), + ntohl(pcb->unsent->tcphdr->seqno) + + TCP_TCPLEN(pcb->unsent))); + + next = pcb->unsent; + pcb->unsent = pcb->unsent->next; + LWIP_DEBUGF(TCP_QLEN_DEBUG, ("tcp_receive: queuelen %u ... ", (unsigned int)pcb->snd_queuelen)); + pcb->snd_queuelen -= pbuf_clen(next->p); + tcp_seg_free(next); + LWIP_DEBUGF(TCP_QLEN_DEBUG, ("%u (after freeing unsent)\n", (unsigned int)pcb->snd_queuelen)); + if (pcb->snd_queuelen != 0) { + LWIP_ASSERT("tcp_receive: valid queue length", pcb->unacked != NULL || + pcb->unsent != NULL); + } + + if (pcb->unsent != NULL) { + pcb->snd_nxt = htonl(pcb->unsent->tcphdr->seqno); + } + } + + /* End of ACK for new data processing. */ + + LWIP_DEBUGF(TCP_RTO_DEBUG, ("tcp_receive: pcb->rttest %u rtseq %lu ackno %lu\n", + pcb->rttest, pcb->rtseq, ackno)); + + /* RTT estimation calculations. This is done by checking if the + incoming segment acknowledges the segment we use to take a + round-trip time measurement. */ + if (pcb->rttest && TCP_SEQ_LT(pcb->rtseq, ackno)) { + m = tcp_ticks - pcb->rttest; + + LWIP_DEBUGF(TCP_RTO_DEBUG, ("tcp_receive: experienced rtt %u ticks (%u msec).\n", + m, m * TCP_SLOW_INTERVAL)); + + /* This is taken directly from VJs original code in his paper */ + m = m - (pcb->sa >> 3); + pcb->sa += m; + if (m < 0) { + m = -m; + } + m = m - (pcb->sv >> 2); + pcb->sv += m; + pcb->rto = (pcb->sa >> 3) + pcb->sv; + + LWIP_DEBUGF(TCP_RTO_DEBUG, ("tcp_receive: RTO %u (%u miliseconds)\n", + pcb->rto, pcb->rto * TCP_SLOW_INTERVAL)); + + pcb->rttest = 0; + } + } + + /* If the incoming segment contains data, we must process it + further. */ + if (tcplen > 0) { + /* This code basically does three things: + + +) If the incoming segment contains data that is the next + in-sequence data, this data is passed to the application. This + might involve trimming the first edge of the data. The rcv_nxt + variable and the advertised window are adjusted. + + +) If the incoming segment has data that is above the next + sequence number expected (->rcv_nxt), the segment is placed on + the ->ooseq queue. This is done by finding the appropriate + place in the ->ooseq queue (which is ordered by sequence + number) and trim the segment in both ends if needed. An + immediate ACK is sent to indicate that we received an + out-of-sequence segment. + + +) Finally, we check if the first segment on the ->ooseq queue + now is in sequence (i.e., if rcv_nxt >= ooseq->seqno). If + rcv_nxt > ooseq->seqno, we must trim the first edge of the + segment on ->ooseq before we adjust rcv_nxt. The data in the + segments that are now on sequence are chained onto the + incoming segment so that we only need to call the application + once. + */ + + /* First, we check if we must trim the first edge. We have to do + this if the sequence number of the incoming segment is less + than rcv_nxt, and the sequence number plus the length of the + segment is larger than rcv_nxt. */ + if (TCP_SEQ_LT(seqno, pcb->rcv_nxt)){ + if (TCP_SEQ_LT(pcb->rcv_nxt, seqno + tcplen)) { + /* Trimming the first edge is done by pushing the payload + pointer in the pbuf downwards. This is somewhat tricky since + we do not want to discard the full contents of the pbuf up to + the new starting point of the data since we have to keep the + TCP header which is present in the first pbuf in the chain. + + What is done is really quite a nasty hack: the first pbuf in + the pbuf chain is pointed to by inseg.p. Since we need to be + able to deallocate the whole pbuf, we cannot change this + inseg.p pointer to point to any of the later pbufs in the + chain. Instead, we point the ->payload pointer in the first + pbuf to data in one of the later pbufs. We also set the + inseg.data pointer to point to the right place. This way, the + ->p pointer will still point to the first pbuf, but the + ->p->payload pointer will point to data in another pbuf. + + After we are done with adjusting the pbuf pointers we must + adjust the ->data pointer in the seg and the segment + length.*/ + off = pcb->rcv_nxt - seqno; + if (inseg.p->len < off) { + p = inseg.p; + while (p->len < off) { + off -= p->len; + inseg.p->tot_len -= p->len; + p->len = 0; + p = p->next; + } + pbuf_header(p, -off); + } else { + pbuf_header(inseg.p, -off); + } + inseg.dataptr = inseg.p->payload; + inseg.len -= pcb->rcv_nxt - seqno; + inseg.tcphdr->seqno = seqno = pcb->rcv_nxt; + } + else{ + /* the whole segment is < rcv_nxt */ + /* must be a duplicate of a packet that has already been correctly handled */ + + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_receive: duplicate seqno %lu\n", seqno)); + tcp_ack_now(pcb); + } + } + + /* The sequence number must be within the window (above rcv_nxt + and below rcv_nxt + rcv_wnd) in order to be further + processed. */ + if (TCP_SEQ_GEQ(seqno, pcb->rcv_nxt) && + TCP_SEQ_LT(seqno, pcb->rcv_nxt + pcb->rcv_wnd)) { + if (pcb->rcv_nxt == seqno) { + /* The incoming segment is the next in sequence. We check if + we have to trim the end of the segment and update rcv_nxt + and pass the data to the application. */ +#if TCP_QUEUE_OOSEQ + if (pcb->ooseq != NULL && + TCP_SEQ_LEQ(pcb->ooseq->tcphdr->seqno, seqno + inseg.len)) { + /* We have to trim the second edge of the incoming + segment. */ + inseg.len = pcb->ooseq->tcphdr->seqno - seqno; + pbuf_realloc(inseg.p, inseg.len); + } +#endif /* TCP_QUEUE_OOSEQ */ + + tcplen = TCP_TCPLEN(&inseg); + + pcb->rcv_nxt += tcplen; + + /* Update the receiver's (our) window. */ + if (pcb->rcv_wnd < tcplen) { + pcb->rcv_wnd = 0; + } else { + pcb->rcv_wnd -= tcplen; + } + + /* If there is data in the segment, we make preparations to + pass this up to the application. The ->recv_data variable + is used for holding the pbuf that goes to the + application. The code for reassembling out-of-sequence data + chains its data on this pbuf as well. + + If the segment was a FIN, we set the TF_GOT_FIN flag that will + be used to indicate to the application that the remote side has + closed its end of the connection. */ + if (inseg.p->tot_len > 0) { + recv_data = inseg.p; + /* Since this pbuf now is the responsibility of the + application, we delete our reference to it so that we won't + (mistakingly) deallocate it. */ + inseg.p = NULL; + } + if (TCPH_FLAGS(inseg.tcphdr) & TCP_FIN) { + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_receive: received FIN.\n")); + recv_flags = TF_GOT_FIN; + } + +#if TCP_QUEUE_OOSEQ + /* We now check if we have segments on the ->ooseq queue that + is now in sequence. */ + while (pcb->ooseq != NULL && + pcb->ooseq->tcphdr->seqno == pcb->rcv_nxt) { + + cseg = pcb->ooseq; + seqno = pcb->ooseq->tcphdr->seqno; + + pcb->rcv_nxt += TCP_TCPLEN(cseg); + if (pcb->rcv_wnd < TCP_TCPLEN(cseg)) { + pcb->rcv_wnd = 0; + } else { + pcb->rcv_wnd -= TCP_TCPLEN(cseg); + } + if (cseg->p->tot_len > 0) { + /* Chain this pbuf onto the pbuf that we will pass to + the application. */ + if (recv_data) { + pbuf_cat(recv_data, cseg->p); + } else { + recv_data = cseg->p; + } + cseg->p = NULL; + } + if (TCPH_FLAGS(cseg->tcphdr) & TCP_FIN) { + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_receive: dequeued FIN.\n")); + recv_flags = TF_GOT_FIN; + } + + + pcb->ooseq = cseg->next; + tcp_seg_free(cseg); + } +#endif /* TCP_QUEUE_OOSEQ */ + + + /* Acknowledge the segment(s). */ + tcp_ack(pcb); + + } else { + /* We get here if the incoming segment is out-of-sequence. */ + tcp_ack_now(pcb); +#if TCP_QUEUE_OOSEQ + /* We queue the segment on the ->ooseq queue. */ + if (pcb->ooseq == NULL) { + pcb->ooseq = tcp_seg_copy(&inseg); + } else { + /* If the queue is not empty, we walk through the queue and + try to find a place where the sequence number of the + incoming segment is between the sequence numbers of the + previous and the next segment on the ->ooseq queue. That is + the place where we put the incoming segment. If needed, we + trim the second edges of the previous and the incoming + segment so that it will fit into the sequence. + + If the incoming segment has the same sequence number as a + segment on the ->ooseq queue, we discard the segment that + contains less data. */ + + prev = NULL; + for(next = pcb->ooseq; next != NULL; next = next->next) { + if (seqno == next->tcphdr->seqno) { + /* The sequence number of the incoming segment is the + same as the sequence number of the segment on + ->ooseq. We check the lengths to see which one to + discard. */ + if (inseg.len > next->len) { + /* The incoming segment is larger than the old + segment. We replace the old segment with the new + one. */ + cseg = tcp_seg_copy(&inseg); + if (cseg != NULL) { + cseg->next = next->next; + if (prev != NULL) { + prev->next = cseg; + } else { + pcb->ooseq = cseg; + } + } + break; + } else { + /* Either the lenghts are the same or the incoming + segment was smaller than the old one; in either + case, we ditch the incoming segment. */ + break; + } + } else { + if (prev == NULL) { + if (TCP_SEQ_LT(seqno, next->tcphdr->seqno)) { + /* The sequence number of the incoming segment is lower + than the sequence number of the first segment on the + queue. We put the incoming segment first on the + queue. */ + + if (TCP_SEQ_GT(seqno + inseg.len, next->tcphdr->seqno)) { + /* We need to trim the incoming segment. */ + inseg.len = next->tcphdr->seqno - seqno; + pbuf_realloc(inseg.p, inseg.len); + } + cseg = tcp_seg_copy(&inseg); + if (cseg != NULL) { + cseg->next = next; + pcb->ooseq = cseg; + } + break; + } + } else if (TCP_SEQ_LT(prev->tcphdr->seqno, seqno) && + TCP_SEQ_LT(seqno, next->tcphdr->seqno)) { + /* The sequence number of the incoming segment is in + between the sequence numbers of the previous and + the next segment on ->ooseq. We trim and insert the + incoming segment and trim the previous segment, if + needed. */ + if (TCP_SEQ_GT(seqno + inseg.len, next->tcphdr->seqno)) { + /* We need to trim the incoming segment. */ + inseg.len = next->tcphdr->seqno - seqno; + pbuf_realloc(inseg.p, inseg.len); + } + + cseg = tcp_seg_copy(&inseg); + if (cseg != NULL) { + cseg->next = next; + prev->next = cseg; + if (TCP_SEQ_GT(prev->tcphdr->seqno + prev->len, seqno)) { + /* We need to trim the prev segment. */ + prev->len = seqno - prev->tcphdr->seqno; + pbuf_realloc(prev->p, prev->len); + } + } + break; + } + /* If the "next" segment is the last segment on the + ooseq queue, we add the incoming segment to the end + of the list. */ + if (next->next == NULL && + TCP_SEQ_GT(seqno, next->tcphdr->seqno)) { + next->next = tcp_seg_copy(&inseg); + if (next->next != NULL) { + if (TCP_SEQ_GT(next->tcphdr->seqno + next->len, seqno)) { + /* We need to trim the last segment. */ + next->len = seqno - next->tcphdr->seqno; + pbuf_realloc(next->p, next->len); + } + } + break; + } + } + prev = next; + } + } +#endif /* TCP_QUEUE_OOSEQ */ + + } + } + } else { + /* Segments with length 0 is taken care of here. Segments that + fall out of the window are ACKed. */ + if (TCP_SEQ_GT(pcb->rcv_nxt, seqno) || + TCP_SEQ_GEQ(seqno, pcb->rcv_nxt + pcb->rcv_wnd)) { + tcp_ack_now(pcb); + } + } +} + +/* + * tcp_parseopt: + * + * Parses the options contained in the incoming segment. (Code taken + * from uIP with only small changes.) + * + */ + +static void +tcp_parseopt(struct tcp_pcb *pcb) +{ + u8_t c; + u8_t *opts, opt; + u16_t mss; + + opts = (u8_t *)tcphdr + TCP_HLEN; + + /* Parse the TCP MSS option, if present. */ + if(TCPH_HDRLEN(tcphdr) > 0x5) { + for(c = 0; c < (TCPH_HDRLEN(tcphdr) - 5) << 2 ;) { + opt = opts[c]; + if (opt == 0x00) { + /* End of options. */ + break; + } else if (opt == 0x01) { + ++c; + /* NOP option. */ + } else if (opt == 0x02 && + opts[c + 1] == 0x04) { + /* An MSS option with the right option length. */ + mss = (opts[c + 2] << 8) | opts[c + 3]; + pcb->mss = mss > TCP_MSS? TCP_MSS: mss; + + /* And we are done processing options. */ + break; + } else { + if (opts[c + 1] == 0) { + /* If the length field is zero, the options are malformed + and we don't process them further. */ + break; + } + /* All other options have a length field, so that we easily + can skip past them. */ + c += opts[c + 1]; + } + } + } +} +#endif /* LWIP_TCP */ + +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/core/tcp_out.c @@ -0,0 +1,652 @@ +/** + * @file + * + * Transmission Control Protocol, outgoing traffic + * + * The output functions of TCP. + * + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + +#include "lwip/def.h" +#include "lwip/opt.h" + +#include "lwip/mem.h" +#include "lwip/memp.h" +#include "lwip/sys.h" + +#include "lwip/ip_addr.h" +#include "lwip/netif.h" + +#include "lwip/inet.h" +#include "lwip/tcp.h" + +#include "lwip/stats.h" + +#if LWIP_TCP + +/* Forward declarations.*/ +static void tcp_output_segment(struct tcp_seg *seg, struct tcp_pcb *pcb); + +err_t +tcp_send_ctrl(struct tcp_pcb *pcb, u8_t flags) +{ + return tcp_enqueue(pcb, NULL, 0, flags, 1, NULL, 0); + +} + +/* + * NB. tcp_write() enqueues data for sending, but does not send it + * straight away. It waits in the expectation of more data being sent + * soon (as it can send them more efficiently by combining them + * together). To prompt the system to send data now, call + * tcp_output() after calling tcp_write(). + */ + +err_t +tcp_write(struct tcp_pcb *pcb, const void *arg, u16_t len, u8_t copy) +{ + LWIP_DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_write(pcb=%p, arg=%p, len=%u, copy=%d)\n", (void *)pcb, + arg, len, (unsigned int)copy)); + if (pcb->state == SYN_SENT || + pcb->state == SYN_RCVD || + pcb->state == ESTABLISHED || + pcb->state == CLOSE_WAIT) { + if (len > 0) { + return tcp_enqueue(pcb, (void *)arg, len, 0, copy, NULL, 0); + } + return ERR_OK; + } else { + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | DBG_STATE | 3, ("tcp_write() called in invalid state\n")); + return ERR_CONN; + } +} + +err_t +tcp_enqueue(struct tcp_pcb *pcb, void *arg, u16_t len, + u8_t flags, u8_t copy, + u8_t *optdata, u8_t optlen) +{ + struct pbuf *p; + struct tcp_seg *seg, *useg, *queue; + u32_t left, seqno; + u16_t seglen; + void *ptr; + u8_t queuelen; + + LWIP_DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_enqueue(pcb=%p, arg=%p, len=%u, flags=%x, copy=%u)\n", + (void *)pcb, arg, len, (unsigned int)flags, (unsigned int)copy)); + left = len; + ptr = arg; + /* fail on too much data */ + if (len > pcb->snd_buf) { + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 3, ("tcp_enqueue: too much data (len=%u > snd_buf=%u)\n", len, pcb->snd_buf)); + return ERR_MEM; + } + + /* seqno will be the sequence number of the first segment enqueued + * by the call to this function. */ + seqno = pcb->snd_lbb; + + queue = NULL; + LWIP_DEBUGF(TCP_QLEN_DEBUG, ("tcp_enqueue: queuelen: %u\n", (unsigned int)pcb->snd_queuelen)); + + /* Check if the queue length exceeds the configured maximum queue + * length. If so, we return an error. */ + queuelen = pcb->snd_queuelen; + if (queuelen >= TCP_SND_QUEUELEN) { + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 3, ("tcp_enqueue: too long queue %u (max %u)\n", queuelen, TCP_SND_QUEUELEN)); + goto memerr; + } + + if (pcb->snd_queuelen != 0) { + LWIP_ASSERT("tcp_enqueue: valid queue length", pcb->unacked != NULL || + pcb->unsent != NULL); + } + + seg = useg = NULL; + seglen = 0; + + /* First, break up the data into segments and tuck them together in + * the local "queue" variable. */ + while (queue == NULL || left > 0) { + + /* The segment length should be the MSS if the data to be enqueued + * is larger than the MSS. */ + seglen = left > pcb->mss? pcb->mss: left; + + /* Allocate memory for tcp_seg, and fill in fields. */ + seg = memp_malloc(MEMP_TCP_SEG); + if (seg == NULL) { + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 2, ("tcp_enqueue: could not allocate memory for tcp_seg\n")); + goto memerr; + } + seg->next = NULL; + seg->p = NULL; + + if (queue == NULL) { + useg = queue = seg; + } + else { + /* Attach the segment to the end of the queued segments. */ + LWIP_ASSERT("useg != NULL", useg != NULL); + useg->next = seg; + useg = seg; + } + + /* If copy is set, memory should be allocated + * and data copied into pbuf, otherwise data comes from + * ROM or other static memory, and need not be copied. If + * optdata is != NULL, we have options instead of data. */ + if (optdata != NULL) { + if ((seg->p = pbuf_alloc(PBUF_TRANSPORT, optlen, PBUF_RAM)) == NULL) { + goto memerr; + } + ++queuelen; + seg->dataptr = seg->p->payload; + } + else if (copy) { + if ((seg->p = pbuf_alloc(PBUF_TRANSPORT, seglen, PBUF_RAM)) == NULL) { + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 2, ("tcp_enqueue : could not allocate memory for pbuf copy size %u\n", seglen)); + goto memerr; + } + ++queuelen; + if (arg != NULL) { + memcpy(seg->p->payload, ptr, seglen); + } + seg->dataptr = seg->p->payload; + } + /* do not copy data */ + else { + + /* first, allocate a pbuf for holding the data. + * since the referenced data is available at least until it is sent out on the + * link (as it has to be ACKed by the remote party) we can safely use PBUF_ROM + * instead of PBUF_REF here. + */ + if ((p = pbuf_alloc(PBUF_TRANSPORT, seglen, PBUF_ROM)) == NULL) { + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 2, ("tcp_enqueue: could not allocate memory for zero-copy pbuf\n")); + goto memerr; + } + ++queuelen; + p->payload = ptr; + seg->dataptr = ptr; + + /* Second, allocate a pbuf for the headers. */ + if ((seg->p = pbuf_alloc(PBUF_TRANSPORT, 0, PBUF_RAM)) == NULL) { + /* If allocation fails, we have to deallocate the data pbuf as + * well. */ + pbuf_free(p); + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 2, ("tcp_enqueue: could not allocate memory for header pbuf\n")); + goto memerr; + } + ++queuelen; + + /* Concatenate the headers and data pbufs together. */ + pbuf_cat(seg->p, p); + p = NULL; + } + + /* Now that there are more segments queued, we check again if the + length of the queue exceeds the configured maximum. */ + if (queuelen > TCP_SND_QUEUELEN) { + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 2, ("tcp_enqueue: queue too long %u (%u)\n", queuelen, TCP_SND_QUEUELEN)); + goto memerr; + } + + seg->len = seglen; +#if 0 /* Was commented out. TODO: can someone say why this is here? */ + if ((flags & TCP_SYN) || (flags & TCP_FIN)) { + ++seg->len; + } +#endif + /* Build TCP header. */ + if (pbuf_header(seg->p, TCP_HLEN)) { + + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 2, ("tcp_enqueue: no room for TCP header in pbuf.\n")); + + TCP_STATS_INC(tcp.err); + goto memerr; + } + seg->tcphdr = seg->p->payload; + seg->tcphdr->src = htons(pcb->local_port); + seg->tcphdr->dest = htons(pcb->remote_port); + seg->tcphdr->seqno = htonl(seqno); + seg->tcphdr->urgp = 0; + TCPH_FLAGS_SET(seg->tcphdr, flags); + /* don't fill in tcphdr->ackno and tcphdr->wnd until later */ + + /* Copy the options into the header, if they are present. */ + if (optdata == NULL) { + TCPH_HDRLEN_SET(seg->tcphdr, 5); + } + else { + TCPH_HDRLEN_SET(seg->tcphdr, (5 + optlen / 4)); + /* Copy options into data portion of segment. + Options can thus only be sent in non data carrying + segments such as SYN|ACK. */ + memcpy(seg->dataptr, optdata, optlen); + } + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | DBG_TRACE, ("tcp_enqueue: queueing %lu:%lu (0x%x)\n", + ntohl(seg->tcphdr->seqno), + ntohl(seg->tcphdr->seqno) + TCP_TCPLEN(seg), + flags)); + + left -= seglen; + seqno += seglen; + ptr = (void *)((char *)ptr + seglen); + } + + + /* Now that the data to be enqueued has been broken up into TCP + segments in the queue variable, we add them to the end of the + pcb->unsent queue. */ + if (pcb->unsent == NULL) { + useg = NULL; + } + else { + for (useg = pcb->unsent; useg->next != NULL; useg = useg->next); + } + + /* If there is room in the last pbuf on the unsent queue, + chain the first pbuf on the queue together with that. */ + if (useg != NULL && + TCP_TCPLEN(useg) != 0 && + !(TCPH_FLAGS(useg->tcphdr) & (TCP_SYN | TCP_FIN)) && + !(flags & (TCP_SYN | TCP_FIN)) && + useg->len + queue->len <= pcb->mss) { + /* Remove TCP header from first segment. */ + pbuf_header(queue->p, -TCP_HLEN); + pbuf_cat(useg->p, queue->p); + useg->len += queue->len; + useg->next = queue->next; + + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | DBG_TRACE | DBG_STATE, ("tcp_enqueue: chaining, new len %u\n", useg->len)); + if (seg == queue) { + seg = NULL; + } + memp_free(MEMP_TCP_SEG, queue); + } + else { + if (useg == NULL) { + pcb->unsent = queue; + + } + else { + useg->next = queue; + } + } + if ((flags & TCP_SYN) || (flags & TCP_FIN)) { + ++len; + } + pcb->snd_lbb += len; + pcb->snd_buf -= len; + pcb->snd_queuelen = queuelen; + LWIP_DEBUGF(TCP_QLEN_DEBUG, ("tcp_enqueue: %d (after enqueued)\n", pcb->snd_queuelen)); + if (pcb->snd_queuelen != 0) { + LWIP_ASSERT("tcp_enqueue: valid queue length", pcb->unacked != NULL || + pcb->unsent != NULL); + + } + + /* Set the PSH flag in the last segment that we enqueued, but only + if the segment has data (indicated by seglen > 0). */ + if (seg != NULL && seglen > 0 && seg->tcphdr != NULL) { + TCPH_SET_FLAG(seg->tcphdr, TCP_PSH); + } + + return ERR_OK; + memerr: + TCP_STATS_INC(tcp.memerr); + + if (queue != NULL) { + tcp_segs_free(queue); + } + if (pcb->snd_queuelen != 0) { + LWIP_ASSERT("tcp_enqueue: valid queue length", pcb->unacked != NULL || + pcb->unsent != NULL); + + } + LWIP_DEBUGF(TCP_QLEN_DEBUG | DBG_STATE, ("tcp_enqueue: %d (with mem err)\n", pcb->snd_queuelen)); + return ERR_MEM; +} + +/* find out what we can send and send it */ +err_t +tcp_output(struct tcp_pcb *pcb) +{ + struct pbuf *p; + struct tcp_hdr *tcphdr; + struct tcp_seg *seg, *useg; + u32_t wnd; +#if TCP_CWND_DEBUG + int i = 0; +#endif /* TCP_CWND_DEBUG */ + + /* First, check if we are invoked by the TCP input processing + code. If so, we do not output anything. Instead, we rely on the + input processing code to call us when input processing is done + with. */ + if (tcp_input_pcb == pcb) { + return ERR_OK; + } + + wnd = LWIP_MIN(pcb->snd_wnd, pcb->cwnd); + + + seg = pcb->unsent; + + /* useg should point to last segment on unacked queue */ + useg = pcb->unacked; + if (useg != NULL) { + for (; useg->next != NULL; useg = useg->next); + } + + + /* If the TF_ACK_NOW flag is set, we check if there is data that is + to be sent. If data is to be sent out, we'll just piggyback our + acknowledgement with the outgoing segment. If no data will be + sent (either because the ->unsent queue is empty or because the + window doesn't allow it) we'll have to construct an empty ACK + segment and send it. */ + if (pcb->flags & TF_ACK_NOW && + (seg == NULL || + ntohl(seg->tcphdr->seqno) - pcb->lastack + seg->len > wnd)) { + pcb->flags &= ~(TF_ACK_DELAY | TF_ACK_NOW); + p = pbuf_alloc(PBUF_IP, TCP_HLEN, PBUF_RAM); + if (p == NULL) { + LWIP_DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_output: (ACK) could not allocate pbuf\n")); + return ERR_BUF; + } + LWIP_DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_output: sending ACK for %lu\n", pcb->rcv_nxt)); + + tcphdr = p->payload; + tcphdr->src = htons(pcb->local_port); + tcphdr->dest = htons(pcb->remote_port); + tcphdr->seqno = htonl(pcb->snd_nxt); + tcphdr->ackno = htonl(pcb->rcv_nxt); + TCPH_FLAGS_SET(tcphdr, TCP_ACK); + tcphdr->wnd = htons(pcb->rcv_wnd); + tcphdr->urgp = 0; + TCPH_HDRLEN_SET(tcphdr, 5); + + tcphdr->chksum = 0; +#if CHECKSUM_GEN_TCP + tcphdr->chksum = inet_chksum_pseudo(p, &(pcb->local_ip), &(pcb->remote_ip), + IP_PROTO_TCP, p->tot_len); +#endif + + ip_output(p, &(pcb->local_ip), &(pcb->remote_ip), pcb->ttl, pcb->tos, + IP_PROTO_TCP); + pbuf_free(p); + + return ERR_OK; + } + +#if TCP_OUTPUT_DEBUG + if (seg == NULL) { + LWIP_DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_output: nothing to send (%p)\n", pcb->unsent)); + } +#endif /* TCP_OUTPUT_DEBUG */ +#if TCP_CWND_DEBUG + if (seg == NULL) { + LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_output: snd_wnd %lu, cwnd %lu, wnd %lu, seg == NULL, ack %lu\n", + pcb->snd_wnd, pcb->cwnd, wnd, + pcb->lastack)); + } else { + LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_output: snd_wnd %lu, cwnd %lu, wnd %lu, effwnd %lu, seq %lu, ack %lu\n", + pcb->snd_wnd, pcb->cwnd, wnd, + ntohl(seg->tcphdr->seqno) - pcb->lastack + seg->len, + ntohl(seg->tcphdr->seqno), pcb->lastack)); + } +#endif /* TCP_CWND_DEBUG */ + + while (seg != NULL && + ntohl(seg->tcphdr->seqno) - pcb->lastack + seg->len <= wnd) { +#if TCP_CWND_DEBUG + LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_output: snd_wnd %lu, cwnd %lu, wnd %lu, effwnd %lu, seq %lu, ack %lu, i%d\n", + pcb->snd_wnd, pcb->cwnd, wnd, + ntohl(seg->tcphdr->seqno) + seg->len - + pcb->lastack, + ntohl(seg->tcphdr->seqno), pcb->lastack, i)); + ++i; +#endif /* TCP_CWND_DEBUG */ + + pcb->unsent = seg->next; + + if (pcb->state != SYN_SENT) { + TCPH_SET_FLAG(seg->tcphdr, TCP_ACK); + pcb->flags &= ~(TF_ACK_DELAY | TF_ACK_NOW); + } + + tcp_output_segment(seg, pcb); + pcb->snd_nxt = ntohl(seg->tcphdr->seqno) + TCP_TCPLEN(seg); + if (TCP_SEQ_LT(pcb->snd_max, pcb->snd_nxt)) { + pcb->snd_max = pcb->snd_nxt; + } + /* put segment on unacknowledged list if length > 0 */ + if (TCP_TCPLEN(seg) > 0) { + seg->next = NULL; + if (pcb->unacked == NULL) { + pcb->unacked = seg; + useg = seg; + } else { + useg->next = seg; + useg = useg->next; + } + } else { + tcp_seg_free(seg); + } + seg = pcb->unsent; + } + return ERR_OK; +} + +static void +tcp_output_segment(struct tcp_seg *seg, struct tcp_pcb *pcb) +{ + u16_t len; + struct netif *netif; + + /* The TCP header has already been constructed, but the ackno and + wnd fields remain. */ + seg->tcphdr->ackno = htonl(pcb->rcv_nxt); + + /* silly window avoidance */ + if (pcb->rcv_wnd < pcb->mss) { + seg->tcphdr->wnd = 0; + } else { + /* advertise our receive window size in this TCP segment */ + seg->tcphdr->wnd = htons(pcb->rcv_wnd); + } + + /* If we don't have a local IP address, we get one by + calling ip_route(). */ + if (ip_addr_isany(&(pcb->local_ip))) { + netif = ip_route(&(pcb->remote_ip)); + if (netif == NULL) { + return; + } + ip_addr_set(&(pcb->local_ip), &(netif->ip_addr)); + } + + pcb->rtime = 0; + + if (pcb->rttest == 0) { + pcb->rttest = tcp_ticks; + pcb->rtseq = ntohl(seg->tcphdr->seqno); + + LWIP_DEBUGF(TCP_RTO_DEBUG, ("tcp_output_segment: rtseq %lu\n", pcb->rtseq)); + } + LWIP_DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_output_segment: %lu:%lu\n", + htonl(seg->tcphdr->seqno), htonl(seg->tcphdr->seqno) + + seg->len)); + + len = (u16_t)((u8_t *)seg->tcphdr - (u8_t *)seg->p->payload); + + seg->p->len -= len; + seg->p->tot_len -= len; + + seg->p->payload = seg->tcphdr; + + seg->tcphdr->chksum = 0; +#if CHECKSUM_GEN_TCP + seg->tcphdr->chksum = inet_chksum_pseudo(seg->p, + &(pcb->local_ip), + &(pcb->remote_ip), + IP_PROTO_TCP, seg->p->tot_len); +#endif + TCP_STATS_INC(tcp.xmit); + + ip_output(seg->p, &(pcb->local_ip), &(pcb->remote_ip), pcb->ttl, pcb->tos, + IP_PROTO_TCP); +} + +void +tcp_rst(u32_t seqno, u32_t ackno, + struct ip_addr *local_ip, struct ip_addr *remote_ip, + u16_t local_port, u16_t remote_port) +{ + struct pbuf *p; + struct tcp_hdr *tcphdr; + p = pbuf_alloc(PBUF_IP, TCP_HLEN, PBUF_RAM); + if (p == NULL) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_rst: could not allocate memory for pbuf\n")); + return; + } + + tcphdr = p->payload; + tcphdr->src = htons(local_port); + tcphdr->dest = htons(remote_port); + tcphdr->seqno = htonl(seqno); + tcphdr->ackno = htonl(ackno); + TCPH_FLAGS_SET(tcphdr, TCP_RST | TCP_ACK); + tcphdr->wnd = htons(TCP_WND); + tcphdr->urgp = 0; + TCPH_HDRLEN_SET(tcphdr, 5); + + tcphdr->chksum = 0; +#if CHECKSUM_GEN_TCP + tcphdr->chksum = inet_chksum_pseudo(p, local_ip, remote_ip, + IP_PROTO_TCP, p->tot_len); +#endif + TCP_STATS_INC(tcp.xmit); + /* Send output with hardcoded TTL since we have no access to the pcb */ + ip_output(p, local_ip, remote_ip, TCP_TTL, 0, IP_PROTO_TCP); + pbuf_free(p); + LWIP_DEBUGF(TCP_RST_DEBUG, ("tcp_rst: seqno %lu ackno %lu.\n", seqno, ackno)); +} + +void +tcp_rexmit(struct tcp_pcb *pcb) +{ + struct tcp_seg *seg; + + if (pcb->unacked == NULL) { + return; + } + + /* Move all unacked segments to the unsent queue. */ + for (seg = pcb->unacked; seg->next != NULL; seg = seg->next); + + seg->next = pcb->unsent; + pcb->unsent = pcb->unacked; + + pcb->unacked = NULL; + + + pcb->snd_nxt = ntohl(pcb->unsent->tcphdr->seqno); + + ++pcb->nrtx; + + /* Don't take any rtt measurements after retransmitting. */ + pcb->rttest = 0; + + /* Do the actual retransmission. */ + tcp_output(pcb); + +} + +void +tcp_keepalive(struct tcp_pcb *pcb) +{ + struct pbuf *p; + struct tcp_hdr *tcphdr; + + LWIP_DEBUGF(TCP_DEBUG, ("tcp_keepalive: sending KEEPALIVE probe to %u.%u.%u.%u\n", + ip4_addr1(&pcb->remote_ip), ip4_addr2(&pcb->remote_ip), + ip4_addr3(&pcb->remote_ip), ip4_addr4(&pcb->remote_ip))); + + LWIP_DEBUGF(TCP_DEBUG, ("tcp_keepalive: tcp_ticks %ld pcb->tmr %ld pcb->keep_cnt %ld\n", tcp_ticks, pcb->tmr, pcb->keep_cnt)); + + p = pbuf_alloc(PBUF_IP, TCP_HLEN, PBUF_RAM); + + if(p == NULL) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_keepalive: could not allocate memory for pbuf\n")); + return; + } + + tcphdr = p->payload; + tcphdr->src = htons(pcb->local_port); + tcphdr->dest = htons(pcb->remote_port); + tcphdr->seqno = htonl(pcb->snd_nxt - 1); + tcphdr->ackno = htonl(pcb->rcv_nxt); + tcphdr->wnd = htons(pcb->rcv_wnd); + tcphdr->urgp = 0; + TCPH_HDRLEN_SET(tcphdr, 5); + + tcphdr->chksum = 0; +#if CHECKSUM_GEN_TCP + tcphdr->chksum = inet_chksum_pseudo(p, &pcb->local_ip, &pcb->remote_ip, IP_PROTO_TCP, p->tot_len); +#endif + TCP_STATS_INC(tcp.xmit); + + /* Send output to IP */ + ip_output(p, &pcb->local_ip, &pcb->remote_ip, pcb->ttl, 0, IP_PROTO_TCP); + + pbuf_free(p); + + LWIP_DEBUGF(TCP_RST_DEBUG, ("tcp_keepalive: seqno %lu ackno %lu.\n", pcb->snd_nxt - 1, pcb->rcv_nxt)); +} + +#endif /* LWIP_TCP */ + + + + + + + + +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/core/udp.c @@ -0,0 +1,796 @@ +/** + * @file + * User Datagram Protocol module + * + */ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + + +/* udp.c + * + * The code for the User Datagram Protocol UDP. + * + */ + +#include "lwip/opt.h" + +#include "lwip/def.h" +#include "lwip/memp.h" +#include "lwip/inet.h" +#include "lwip/ip_addr.h" +#include "lwip/netif.h" +#include "lwip/udp.h" +#include "lwip/icmp.h" + +#include "lwip/stats.h" + +#include "arch/perf.h" +#include "lwip/snmp.h" + +/* The list of UDP PCBs */ +#if LWIP_UDP +/* was static, but we may want to access this from a socket layer */ +struct udp_pcb *udp_pcbs = NULL; + +static struct udp_pcb *pcb_cache = NULL; + + +void +udp_init(void) +{ + udp_pcbs = pcb_cache = NULL; +} + +/** + * Process an incoming UDP datagram. + * + * Given an incoming UDP datagram (as a chain of pbufs) this function + * finds a corresponding UDP PCB and + * + * @param pbuf pbuf to be demultiplexed to a UDP PCB. + * @param netif network interface on which the datagram was received. + * + */ +void +udp_input(struct pbuf *p, struct netif *inp) +{ + struct udp_hdr *udphdr; + struct udp_pcb *pcb; + struct ip_hdr *iphdr; + u16_t src, dest; + +#if SO_REUSE + struct udp_pcb *pcb_temp; + int reuse = 0; + int reuse_port_1 = 0; + int reuse_port_2 = 0; +#endif /* SO_REUSE */ + + PERF_START; + + UDP_STATS_INC(udp.recv); + + iphdr = p->payload; + + if (pbuf_header(p, -((s16_t)(UDP_HLEN + IPH_HL(iphdr) * 4)))) { + /* drop short packets */ + LWIP_DEBUGF(UDP_DEBUG, ("udp_input: short UDP datagram (%u bytes) discarded\n", p->tot_len)); + UDP_STATS_INC(udp.lenerr); + UDP_STATS_INC(udp.drop); + snmp_inc_udpinerrors(); + pbuf_free(p); + goto end; + } + + udphdr = (struct udp_hdr *)((u8_t *)p->payload - UDP_HLEN); + + LWIP_DEBUGF(UDP_DEBUG, ("udp_input: received datagram of length %u\n", p->tot_len)); + + src = ntohs(udphdr->src); + dest = ntohs(udphdr->dest); + + udp_debug_print(udphdr); + + /* print the UDP source and destination */ + LWIP_DEBUGF(UDP_DEBUG, ("udp (%u.%u.%u.%u, %u) <-- (%u.%u.%u.%u, %u)\n", + ip4_addr1(&iphdr->dest), ip4_addr2(&iphdr->dest), + ip4_addr3(&iphdr->dest), ip4_addr4(&iphdr->dest), ntohs(udphdr->dest), + ip4_addr1(&iphdr->src), ip4_addr2(&iphdr->src), + ip4_addr3(&iphdr->src), ip4_addr4(&iphdr->src), ntohs(udphdr->src))); + +#if SO_REUSE + pcb_temp = udp_pcbs; + + again_1: + + /* Iterate through the UDP pcb list for a fully matching pcb */ + for(pcb = pcb_temp; pcb != NULL; pcb = pcb->next) { +#else /* SO_REUSE */ + /* Iterate through the UDP pcb list for a fully matching pcb */ + for(pcb = udp_pcbs; pcb != NULL; pcb = pcb->next) { +#endif /* SO_REUSE */ + /* print the PCB local and remote address */ + LWIP_DEBUGF(UDP_DEBUG, ("pcb (%u.%u.%u.%u, %u) --- (%u.%u.%u.%u, %u)\n", + ip4_addr1(&pcb->local_ip), ip4_addr2(&pcb->local_ip), + ip4_addr3(&pcb->local_ip), ip4_addr4(&pcb->local_ip), pcb->local_port, + ip4_addr1(&pcb->remote_ip), ip4_addr2(&pcb->remote_ip), + ip4_addr3(&pcb->remote_ip), ip4_addr4(&pcb->remote_ip), pcb->remote_port)); + + /* PCB remote port matches UDP source port? */ + if ((pcb->remote_port == src) && + /* PCB local port matches UDP destination port? */ + (pcb->local_port == dest) && + /* accepting from any remote (source) IP address? or... */ + (ip_addr_isany(&pcb->remote_ip) || + /* PCB remote IP address matches UDP source IP address? */ + ip_addr_cmp(&(pcb->remote_ip), &(iphdr->src))) && + /* accepting on any local (netif) IP address? or... */ + (ip_addr_isany(&pcb->local_ip) || + /* PCB local IP address matches UDP destination IP address? */ + ip_addr_cmp(&(pcb->local_ip), &(iphdr->dest)))) { +#if SO_REUSE + if(pcb->so_options & SOF_REUSEPORT) { + if(reuse) { + /* We processed one PCB already */ + LWIP_DEBUGF(UDP_DEBUG, ("udp_input: second or later PCB and SOF_REUSEPORT set.\n")); + } else { + /* First PCB with this address */ + LWIP_DEBUGF(UDP_DEBUG, ("udp_input: first PCB and SOF_REUSEPORT set.\n")); + reuse = 1; + } + + reuse_port_1 = 1; + p->ref++; + LWIP_DEBUGF(UDP_DEBUG, ("udp_input: reference counter on PBUF set to %i\n", p->ref)); + } else { + if(reuse) { + /* We processed one PCB already */ + LWIP_DEBUGF(UDP_DEBUG, ("udp_input: second or later PCB but SOF_REUSEPORT not set !\n")); + } + } +#endif /* SO_REUSE */ + break; + } + } + /* no fully matching pcb found? then look for an unconnected pcb */ + if (pcb == NULL) { + /* Iterate through the UDP PCB list for a pcb that matches + the local address. */ + +#if SO_REUSE + pcb_temp = udp_pcbs; + + again_2: + + for(pcb = pcb_temp; pcb != NULL; pcb = pcb->next) { +#else /* SO_REUSE */ + for(pcb = udp_pcbs; pcb != NULL; pcb = pcb->next) { +#endif /* SO_REUSE */ + LWIP_DEBUGF(UDP_DEBUG, ("pcb (%u.%u.%u.%u, %u) --- (%u.%u.%u.%u, %u)\n", + ip4_addr1(&pcb->local_ip), ip4_addr2(&pcb->local_ip), + ip4_addr3(&pcb->local_ip), ip4_addr4(&pcb->local_ip), pcb->local_port, + ip4_addr1(&pcb->remote_ip), ip4_addr2(&pcb->remote_ip), + ip4_addr3(&pcb->remote_ip), ip4_addr4(&pcb->remote_ip), pcb->remote_port)); + /* unconnected? */ + if (((pcb->flags & UDP_FLAGS_CONNECTED) == 0) && + /* destination port matches? */ + (pcb->local_port == dest) && + /* not bound to a specific (local) interface address? or... */ + (ip_addr_isany(&pcb->local_ip) || + /* ...matching interface address? */ + ip_addr_cmp(&(pcb->local_ip), &(iphdr->dest)))) { +#if SO_REUSE + if(pcb->so_options & SOF_REUSEPORT) { + if(reuse) { + /* We processed one PCB already */ + LWIP_DEBUGF(UDP_DEBUG, ("udp_input: second or later PCB and SOF_REUSEPORT set.\n")); + } else { + /* First PCB with this address */ + LWIP_DEBUGF(UDP_DEBUG, ("udp_input: first PCB and SOF_REUSEPORT set.\n")); + reuse = 1; + } + + reuse_port_2 = 1; + p->ref++; + LWIP_DEBUGF(UDP_DEBUG, ("udp_input: reference counter on PBUF set to %i\n", p->ref)); + } else { + if(reuse) { + /* We processed one PCB already */ + LWIP_DEBUGF(UDP_DEBUG, ("udp_input: second or later PCB but SOF_REUSEPORT not set !\n")); + } + } +#endif /* SO_REUSE */ + break; + } + } + } + + /* Check checksum if this is a match or if it was directed at us. */ + if (pcb != NULL || ip_addr_cmp(&inp->ip_addr, &iphdr->dest)) + { + LWIP_DEBUGF(UDP_DEBUG | DBG_TRACE, ("udp_input: calculating checksum\n")); + pbuf_header(p, UDP_HLEN); +#ifdef IPv6 + if (iphdr->nexthdr == IP_PROTO_UDPLITE) { +#else + if (IPH_PROTO(iphdr) == IP_PROTO_UDPLITE) { +#endif /* IPv4 */ + /* Do the UDP Lite checksum */ +#if CHECKSUM_CHECK_UDP + if (inet_chksum_pseudo(p, (struct ip_addr *)&(iphdr->src), + (struct ip_addr *)&(iphdr->dest), + IP_PROTO_UDPLITE, ntohs(udphdr->len)) != 0) { + LWIP_DEBUGF(UDP_DEBUG | 2, ("udp_input: UDP Lite datagram discarded due to failing checksum\n")); + UDP_STATS_INC(udp.chkerr); + UDP_STATS_INC(udp.drop); + snmp_inc_udpinerrors(); + pbuf_free(p); + goto end; + } +#endif + } else { +#if CHECKSUM_CHECK_UDP + if (udphdr->chksum != 0) { + if (inet_chksum_pseudo(p, (struct ip_addr *)&(iphdr->src), + (struct ip_addr *)&(iphdr->dest), + IP_PROTO_UDP, p->tot_len) != 0) { + LWIP_DEBUGF(UDP_DEBUG | 2, ("udp_input: UDP datagram discarded due to failing checksum\n")); + + UDP_STATS_INC(udp.chkerr); + UDP_STATS_INC(udp.drop); + snmp_inc_udpinerrors(); + pbuf_free(p); + goto end; + } + } +#endif + } + pbuf_header(p, -UDP_HLEN); + if (pcb != NULL) { + snmp_inc_udpindatagrams(); + pcb->recv(pcb->recv_arg, pcb, p, &(iphdr->src), src); +#if SO_REUSE + /* First socket should receive now */ + if(reuse_port_1 || reuse_port_2) { + /* We want to search on next socket after receiving */ + pcb_temp = pcb->next; + + if(reuse_port_1) { + /* We are searching connected sockets */ + reuse_port_1 = 0; + reuse_port_2 = 0; + goto again_1; + } else { + /* We are searching unconnected sockets */ + reuse_port_1 = 0; + reuse_port_2 = 0; + goto again_2; + } + } +#endif /* SO_REUSE */ + } else { +#if SO_REUSE + if(reuse) { + LWIP_DEBUGF(UDP_DEBUG, ("udp_input: freeing PBUF with reference counter set to %i\n", p->ref)); + pbuf_free(p); + goto end; + } +#endif /* SO_REUSE */ + LWIP_DEBUGF(UDP_DEBUG | DBG_TRACE, ("udp_input: not for us.\n")); + + /* No match was found, send ICMP destination port unreachable unless + destination address was broadcast/multicast. */ + + if (!ip_addr_isbroadcast(&iphdr->dest, inp) && + !ip_addr_ismulticast(&iphdr->dest)) { + + /* adjust pbuf pointer */ + p->payload = iphdr; + icmp_dest_unreach(p, ICMP_DUR_PORT); + } + UDP_STATS_INC(udp.proterr); + UDP_STATS_INC(udp.drop); + snmp_inc_udpnoports(); + pbuf_free(p); + } + } else { + pbuf_free(p); + } + end: + + PERF_STOP("udp_input"); +} + +/** + * Send data to a specified address using UDP. + * + * @param pcb UDP PCB used to send the data. + * @param pbuf chain of pbuf's to be sent. + * @param dst_ip Destination IP address. + * @param dst_port Destination UDP port. + * + * If the PCB already has a remote address association, it will + * be restored after the data is sent. + * + * @return lwIP error code. + * - ERR_OK. Successful. No error occured. + * - ERR_MEM. Out of memory. + * - ERR_RTE. Could not find route to destination address. + * + * @see udp_disconnect() udp_send() + */ +err_t +udp_sendto(struct udp_pcb *pcb, struct pbuf *p, + struct ip_addr *dst_ip, u16_t dst_port) +{ + err_t err; + struct ip_addr pcb_remote_ip; + u16_t pcb_remote_port; + /* remember remote peer address of PCB */ + pcb_remote_ip.addr = pcb->remote_ip.addr; + pcb_remote_port = pcb->remote_port; + /* copy packet destination address to PCB remote peer address */ + pcb->remote_ip.addr = dst_ip->addr; + pcb->remote_port = dst_port; + /* send to the packet destination address */ + err = udp_send(pcb, p); + /* reset PCB remote peer address */ + pcb->remote_ip.addr = pcb_remote_ip.addr; + pcb->remote_port = pcb_remote_port; + return err; +} + +/** + * Send data using UDP. + * + * @param pcb UDP PCB used to send the data. + * @param pbuf chain of pbuf's to be sent. + * + * @return lwIP error code. + * - ERR_OK. Successful. No error occured. + * - ERR_MEM. Out of memory. + * - ERR_RTE. Could not find route to destination address. + * + * @see udp_disconnect() udp_sendto() + */ +err_t +udp_send(struct udp_pcb *pcb, struct pbuf *p) +{ + struct udp_hdr *udphdr; + struct netif *netif; + struct ip_addr *src_ip; + err_t err; + struct pbuf *q; /* q will be sent down the stack */ + + LWIP_DEBUGF(UDP_DEBUG | DBG_TRACE | 3, ("udp_send\n")); + + /* if the PCB is not yet bound to a port, bind it here */ + if (pcb->local_port == 0) { + LWIP_DEBUGF(UDP_DEBUG | DBG_TRACE | 2, ("udp_send: not yet bound to a port, binding now\n")); + err = udp_bind(pcb, &pcb->local_ip, pcb->local_port); + if (err != ERR_OK) { + LWIP_DEBUGF(UDP_DEBUG | DBG_TRACE | 2, ("udp_send: forced port bind failed\n")); + return err; + } + } + + /* not enough space to add an UDP header to first pbuf in given p chain? */ + if (pbuf_header(p, UDP_HLEN)) { + /* allocate header in a seperate new pbuf */ + q = pbuf_alloc(PBUF_IP, UDP_HLEN, PBUF_RAM); + /* new header pbuf could not be allocated? */ + if (q == NULL) { + LWIP_DEBUGF(UDP_DEBUG | DBG_TRACE | 2, ("udp_send: could not allocate header\n")); + return ERR_MEM; + } + /* chain header q in front of given pbuf p */ + pbuf_chain(q, p); + /* { first pbuf q points to header pbuf } */ + LWIP_DEBUGF(UDP_DEBUG, ("udp_send: added header pbuf %p before given pbuf %p\n", (void *)q, (void *)p)); + /* adding a header within p succeeded */ + } else { + /* first pbuf q equals given pbuf */ + q = p; + LWIP_DEBUGF(UDP_DEBUG, ("udp_send: added header in given pbuf %p\n", (void *)p)); + } + /* { q now represents the packet to be sent } */ + udphdr = q->payload; + udphdr->src = htons(pcb->local_port); + udphdr->dest = htons(pcb->remote_port); + /* in UDP, 0 checksum means 'no checksum' */ + udphdr->chksum = 0x0000; + + /* find the outgoing network interface for this packet */ + if ((netif = ip_route(&(pcb->remote_ip))) == NULL) { + LWIP_DEBUGF(UDP_DEBUG | 1, ("udp_send: No route to 0x%lx\n", pcb->remote_ip.addr)); + UDP_STATS_INC(udp.rterr); + return ERR_RTE; + } + /* PCB local address is IP_ANY_ADDR? */ + if (ip_addr_isany(&pcb->local_ip)) { + /* use outgoing network interface IP address as source address */ + src_ip = &(netif->ip_addr); + } else { + /* use UDP PCB local IP address as source address */ + src_ip = &(pcb->local_ip); + } + + LWIP_DEBUGF(UDP_DEBUG, ("udp_send: sending datagram of length %u\n", q->tot_len)); + + /* UDP Lite protocol? */ + if (pcb->flags & UDP_FLAGS_UDPLITE) { + LWIP_DEBUGF(UDP_DEBUG, ("udp_send: UDP LITE packet length %u\n", q->tot_len)); + /* set UDP message length in UDP header */ + udphdr->len = htons(pcb->chksum_len); + /* calculate checksum */ +#if CHECKSUM_GEN_UDP + udphdr->chksum = inet_chksum_pseudo(q, src_ip, &(pcb->remote_ip), + IP_PROTO_UDP, pcb->chksum_len); + /* chksum zero must become 0xffff, as zero means 'no checksum' */ + if (udphdr->chksum == 0x0000) udphdr->chksum = 0xffff; +#else + udphdr->chksum = 0x0000; +#endif + /* output to IP */ + LWIP_DEBUGF(UDP_DEBUG, ("udp_send: ip_output_if (,,,,IP_PROTO_UDPLITE,)\n")); + err = ip_output_if (q, src_ip, &pcb->remote_ip, pcb->ttl, pcb->tos, IP_PROTO_UDPLITE, netif); + /* UDP */ + } else { + LWIP_DEBUGF(UDP_DEBUG, ("udp_send: UDP packet length %u\n", q->tot_len)); + udphdr->len = htons(q->tot_len); + /* calculate checksum */ +#if CHECKSUM_GEN_UDP + if ((pcb->flags & UDP_FLAGS_NOCHKSUM) == 0) { + udphdr->chksum = inet_chksum_pseudo(q, src_ip, &pcb->remote_ip, IP_PROTO_UDP, q->tot_len); + /* chksum zero must become 0xffff, as zero means 'no checksum' */ + if (udphdr->chksum == 0x0000) udphdr->chksum = 0xffff; + } +#else + udphdr->chksum = 0x0000; +#endif + LWIP_DEBUGF(UDP_DEBUG, ("udp_send: UDP checksum 0x%04x\n", udphdr->chksum)); + LWIP_DEBUGF(UDP_DEBUG, ("udp_send: ip_output_if (,,,,IP_PROTO_UDP,)\n")); + /* output to IP */ + err = ip_output_if(q, src_ip, &pcb->remote_ip, pcb->ttl, pcb->tos, IP_PROTO_UDP, netif); + } + /* TODO: must this be increased even if error occured? */ + snmp_inc_udpoutdatagrams(); + + /* did we chain a seperate header pbuf earlier? */ + if (q != p) { + /* free the header pbuf */ + pbuf_free(q); q = NULL; + /* { p is still referenced by the caller, and will live on } */ + } + + UDP_STATS_INC(udp.xmit); + return err; +} + +/** + * Bind an UDP PCB. + * + * @param pcb UDP PCB to be bound with a local address ipaddr and port. + * @param ipaddr local IP address to bind with. Use IP_ADDR_ANY to + * bind to all local interfaces. + * @param port local UDP port to bind with. + * + * @return lwIP error code. + * - ERR_OK. Successful. No error occured. + * - ERR_USE. The specified ipaddr and port are already bound to by + * another UDP PCB. + * + * @see udp_disconnect() + */ +err_t +udp_bind(struct udp_pcb *pcb, struct ip_addr *ipaddr, u16_t port) +{ + struct udp_pcb *ipcb; + u8_t rebind; +#if SO_REUSE + int reuse_port_all_set = 1; +#endif /* SO_REUSE */ + LWIP_DEBUGF(UDP_DEBUG | DBG_TRACE | 3, ("udp_bind(ipaddr = ")); + ip_addr_debug_print(UDP_DEBUG, ipaddr); + LWIP_DEBUGF(UDP_DEBUG | DBG_TRACE | 3, (", port = %u)\n", port)); + + rebind = 0; + /* Check for double bind and rebind of the same pcb */ + for (ipcb = udp_pcbs; ipcb != NULL; ipcb = ipcb->next) { + /* is this UDP PCB already on active list? */ + if (pcb == ipcb) { + /* pcb may occur at most once in active list */ + LWIP_ASSERT("rebind == 0", rebind == 0); + /* pcb already in list, just rebind */ + rebind = 1; + } + +#if SO_REUSE == 0 +/* this code does not allow upper layer to share a UDP port for + listening to broadcast or multicast traffic (See SO_REUSE_ADDR and + SO_REUSE_PORT under *BSD). TODO: See where it fits instead, OR + combine with implementation of UDP PCB flags. Leon Woestenberg. */ +#ifdef LWIP_UDP_TODO + /* port matches that of PCB in list? */ + else if ((ipcb->local_port == port) && + /* IP address matches, or one is IP_ADDR_ANY? */ + (ip_addr_isany(&(ipcb->local_ip)) || + ip_addr_isany(ipaddr) || + ip_addr_cmp(&(ipcb->local_ip), ipaddr))) { + /* other PCB already binds to this local IP and port */ + LWIP_DEBUGF(UDP_DEBUG, ("udp_bind: local port %u already bound by another pcb\n", port)); + return ERR_USE; + } +#endif + +#else /* SO_REUSE */ + /* Search through list of PCB's. + + If there is a PCB bound to specified port and IP_ADDR_ANY another PCB can be bound to the interface IP + or to the loopback address on the same port if SOF_REUSEADDR is set. Any combination of PCB's bound to + the same local port, but to one address out of {IP_ADDR_ANY, 127.0.0.1, interface IP} at a time is valid. + But no two PCB's bound to same local port and same local address is valid. + + If SOF_REUSEPORT is set several PCB's can be bound to same local port and same local address also. But then + all PCB's must have the SOF_REUSEPORT option set. + + When the two options aren't set and specified port is already bound, ERR_USE is returned saying that + address is already in use. */ + else if (ipcb->local_port == port) { + if(ip_addr_cmp(&(ipcb->local_ip), ipaddr)) { + if(pcb->so_options & SOF_REUSEPORT) { + LWIP_DEBUGF(UDP_DEBUG, ("udp_bind: in UDP PCB's SO_REUSEPORT set and same address.\n")); + reuse_port_all_set = (reuse_port_all_set && (ipcb->so_options & SOF_REUSEPORT)); + } + else { + LWIP_DEBUGF(UDP_DEBUG, ("udp_bind: in UDP PCB's SO_REUSEPORT not set and same address.\n")); + return ERR_USE; + } + } + else if((ip_addr_isany(ipaddr) && !ip_addr_isany(&(ipcb->local_ip))) || + (!ip_addr_isany(ipaddr) && ip_addr_isany(&(ipcb->local_ip)))) { + if(!(pcb->so_options & SOF_REUSEADDR) && !(pcb->so_options & SOF_REUSEPORT)) { + LWIP_DEBUGF(UDP_DEBUG, ("udp_bind: in UDP PCB's SO_REUSEPORT or SO_REUSEADDR not set and not the same address.\n")); + return ERR_USE; + } + } + } +#endif /* SO_REUSE */ + + } + +#if SO_REUSE + /* If SOF_REUSEPORT isn't set in all PCB's bound to specified port and local address specified then + {IP, port} can't be reused. */ + if(!reuse_port_all_set) { + LWIP_DEBUGF(UDP_DEBUG, ("udp_bind: not all sockets have SO_REUSEPORT set.\n")); + return ERR_USE; + } +#endif /* SO_REUSE */ + + ip_addr_set(&pcb->local_ip, ipaddr); + /* no port specified? */ + if (port == 0) { +#ifndef UDP_LOCAL_PORT_RANGE_START +#define UDP_LOCAL_PORT_RANGE_START 4096 +#define UDP_LOCAL_PORT_RANGE_END 0x7fff +#endif + port = UDP_LOCAL_PORT_RANGE_START; + ipcb = udp_pcbs; + while ((ipcb != NULL) && (port != UDP_LOCAL_PORT_RANGE_END)) { + if (ipcb->local_port == port) { + port++; + ipcb = udp_pcbs; + } else + ipcb = ipcb->next; + } + if (ipcb != NULL) { + /* no more ports available in local range */ + LWIP_DEBUGF(UDP_DEBUG, ("udp_bind: out of free UDP ports\n")); + return ERR_USE; + } + } + pcb->local_port = port; + /* pcb not active yet? */ + if (rebind == 0) { + /* place the PCB on the active list if not already there */ + pcb->next = udp_pcbs; + udp_pcbs = pcb; + } + LWIP_DEBUGF(UDP_DEBUG | DBG_TRACE | DBG_STATE, ("udp_bind: bound to %u.%u.%u.%u, port %u\n", + (unsigned int)(ntohl(pcb->local_ip.addr) >> 24 & 0xff), + (unsigned int)(ntohl(pcb->local_ip.addr) >> 16 & 0xff), + (unsigned int)(ntohl(pcb->local_ip.addr) >> 8 & 0xff), + (unsigned int)(ntohl(pcb->local_ip.addr) & 0xff), pcb->local_port)); + return ERR_OK; +} +/** + * Connect an UDP PCB. + * + * This will associate the UDP PCB with the remote address. + * + * @param pcb UDP PCB to be connected with remote address ipaddr and port. + * @param ipaddr remote IP address to connect with. + * @param port remote UDP port to connect with. + * + * @return lwIP error code + * + * @see udp_disconnect() + */ +err_t +udp_connect(struct udp_pcb *pcb, struct ip_addr *ipaddr, u16_t port) +{ + struct udp_pcb *ipcb; + + if (pcb->local_port == 0) { + err_t err = udp_bind(pcb, &pcb->local_ip, pcb->local_port); + if (err != ERR_OK) + return err; + } + + ip_addr_set(&pcb->remote_ip, ipaddr); + pcb->remote_port = port; + pcb->flags |= UDP_FLAGS_CONNECTED; +/** TODO: this functionality belongs in upper layers */ +#ifdef LWIP_UDP_TODO + /* Nail down local IP for netconn_addr()/getsockname() */ + if (ip_addr_isany(&pcb->local_ip) && !ip_addr_isany(&pcb->remote_ip)) { + struct netif *netif; + + if ((netif = ip_route(&(pcb->remote_ip))) == NULL) { + LWIP_DEBUGF(UDP_DEBUG, ("udp_connect: No route to 0x%lx\n", pcb->remote_ip.addr)); + UDP_STATS_INC(udp.rterr); + return ERR_RTE; + } + /** TODO: this will bind the udp pcb locally, to the interface which + is used to route output packets to the remote address. However, we + might want to accept incoming packets on any interface! */ + pcb->local_ip = netif->ip_addr; + } else if (ip_addr_isany(&pcb->remote_ip)) { + pcb->local_ip.addr = 0; + } +#endif + LWIP_DEBUGF(UDP_DEBUG | DBG_TRACE | DBG_STATE, ("udp_connect: connected to %u.%u.%u.%u, port %u\n", + (unsigned int)(ntohl(pcb->remote_ip.addr) >> 24 & 0xff), + (unsigned int)(ntohl(pcb->remote_ip.addr) >> 16 & 0xff), + (unsigned int)(ntohl(pcb->remote_ip.addr) >> 8 & 0xff), + (unsigned int)(ntohl(pcb->remote_ip.addr) & 0xff), pcb->remote_port)); + + /* Insert UDP PCB into the list of active UDP PCBs. */ + for(ipcb = udp_pcbs; ipcb != NULL; ipcb = ipcb->next) { + if (pcb == ipcb) { + /* already on the list, just return */ + return ERR_OK; + } + } + /* PCB not yet on the list, add PCB now */ + pcb->next = udp_pcbs; + udp_pcbs = pcb; + return ERR_OK; +} + +void +udp_disconnect(struct udp_pcb *pcb) +{ + /* reset remote address association */ + ip_addr_set(&pcb->remote_ip, IP_ADDR_ANY); + pcb->remote_port = 0; + /* mark PCB as unconnected */ + pcb->flags &= ~UDP_FLAGS_CONNECTED; +} + +void +udp_recv(struct udp_pcb *pcb, + void (* recv)(void *arg, struct udp_pcb *upcb, struct pbuf *p, + struct ip_addr *addr, u16_t port), + void *recv_arg) +{ + /* remember recv() callback and user data */ + pcb->recv = recv; + pcb->recv_arg = recv_arg; +} +/** + * Remove an UDP PCB. + * + * @param pcb UDP PCB to be removed. The PCB is removed from the list of + * UDP PCB's and the data structure is freed from memory. + * + * @see udp_new() + */ +void +udp_remove(struct udp_pcb *pcb) +{ + struct udp_pcb *pcb2; + /* pcb to be removed is first in list? */ + if (udp_pcbs == pcb) { + /* make list start at 2nd pcb */ + udp_pcbs = udp_pcbs->next; + /* pcb not 1st in list */ + } else for(pcb2 = udp_pcbs; pcb2 != NULL; pcb2 = pcb2->next) { + /* find pcb in udp_pcbs list */ + if (pcb2->next != NULL && pcb2->next == pcb) { + /* remove pcb from list */ + pcb2->next = pcb->next; + } + } + memp_free(MEMP_UDP_PCB, pcb); +} +/** + * Create a UDP PCB. + * + * @return The UDP PCB which was created. NULL if the PCB data structure + * could not be allocated. + * + * @see udp_remove() + */ +struct udp_pcb * +udp_new(void) { + struct udp_pcb *pcb; + pcb = memp_malloc(MEMP_UDP_PCB); + /* could allocate UDP PCB? */ + if (pcb != NULL) { + /* initialize PCB to all zeroes */ + memset(pcb, 0, sizeof(struct udp_pcb)); + pcb->ttl = UDP_TTL; + } + + + return pcb; +} + +#if UDP_DEBUG +int +udp_debug_print(struct udp_hdr *udphdr) +{ + LWIP_DEBUGF(UDP_DEBUG, ("UDP header:\n")); + LWIP_DEBUGF(UDP_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(UDP_DEBUG, ("| %5u | %5u | (src port, dest port)\n", + ntohs(udphdr->src), ntohs(udphdr->dest))); + LWIP_DEBUGF(UDP_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(UDP_DEBUG, ("| %5u | 0x%04x | (len, chksum)\n", + ntohs(udphdr->len), ntohs(udphdr->chksum))); + LWIP_DEBUGF(UDP_DEBUG, ("+-------------------------------+\n")); + return 0; +} +#endif /* UDP_DEBUG */ + +#endif /* LWIP_UDP */ + + + + + + + + +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/ecos/init.c @@ -0,0 +1,259 @@ +//========================================================================== +//####ECOSGPLCOPYRIGHTBEGIN#### +// ------------------------------------------- +// This file is part of eCos, the Embedded Configurable Operating System. +// Copyright (C) 2004 eCosCentric +// +// eCos is free software; you can redistribute it and/or modify it under +// the terms of the GNU General Public License as published by the Free +// Software Foundation; either version 2 or (at your option) any later version. +// +// eCos is distributed in the hope that it will be useful, but WITHOUT ANY +// WARRANTY; without even the implied warranty of MERCHANTABILITY or +// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +// for more details. +// +// You should have received a copy of the GNU General Public License along +// with eCos; if not, write to the Free Software Foundation, Inc., +// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. +// +// As a special exception, if other files instantiate templates or use macros +// or inline functions from this file, or you compile this file and link it +// with other works to produce a work based on this file, this file does not +// by itself cause the resulting work to be covered by the GNU General Public +// License. However the source code for this file must still be made available +// in accordance with section (3) of the GNU General Public License. +// +// This exception does not invalidate any other reasons why a work based on +// this file might be covered by the GNU General Public License. +// ------------------------------------------- +//####ECOSGPLCOPYRIGHTEND#### +//========================================================================== + +/* + * init.c - misc lwip ecos glue functions + */ +#include <pkgconf/system.h> +#include "lwip/opt.h" +#include "lwip/sys.h" +#include "lwip/memp.h" +#include "lwip/tcpip.h" +#include "lwip/ip_addr.h" + +#if LWIP_DHCP +#include "lwip/dhcp.h" +#endif + +#if LWIP_SLIP +#include "netif/slipif.h" +#endif + +#if PPP_SUPPORT +#include "netif/ppp/ppp.h" +#endif + +#include "netif/loopif.h" +#include <cyg/hal/hal_if.h> +#include <cyg/infra/diag.h> + +#ifdef CYGPKG_LWIP_ETH +#include "netif/etharp.h" + +#include <cyg/io/eth/eth_drv.h> +#include <cyg/io/eth/netdev.h> + + +// Define table boundaries +CYG_HAL_TABLE_BEGIN(__NETDEVTAB__, netdev); +CYG_HAL_TABLE_END(__NETDEVTAB_END__, netdev); +static void ecosglue_init(void); +#endif + +void inline IP_ADDR(struct ip_addr *ipaddr, char a, char b, char c, char d) +{ + IP4_ADDR(ipaddr,a,b,c,d); +} + + +void tcpip_init_done(void * arg) +{ + sys_sem_t *sem = arg; + sys_sem_signal(*sem); +} + +struct netif mynetif, loopif; +void lwip_set_addr(struct netif *netif); +#if PPP_SUPPORT +#define PPP_USER "pppuser" +#define PPP_PASS "ppppass" + +void +pppMyCallback(void *a , int e, void * arg) +{ + diag_printf("callback %d \n",e); +} + +/* These temporarily here */ +unsigned long +sys_jiffies(void) +{ + return cyg_current_time(); +} + +void +ppp_trace(int level, const char *format,...) +{ + va_list args; + + (void)level; + va_start(args, format); + diag_vprintf(format, args); + va_end(args); +} +#endif + +#if LWIP_HAVE_LOOPIF +struct netif ecos_loopif; +#endif + +/* + * Called by the eCos application at startup + * wraps various init calls + */ +int +lwip_init(void) +{ + struct ip_addr ipaddr, netmask, gw; + static int inited = 0; + sys_sem_t sem; + if (inited) + return 1; + inited++; + + sys_init(); /* eCos specific initialization */ + mem_init(); /* heap based memory allocator */ + memp_init(); /* pool based memory allocator */ + pbuf_init(); /* packet buffer allocator */ + netif_init(); /* netif layer */ + + /* Start the stack.It will spawn a new dedicated thread */ + sem = sys_sem_new(0); + tcpip_init(tcpip_init_done,&sem); + sys_sem_wait(sem); + sys_sem_free(sem); + +#if LWIP_HAVE_LOOPIF + IP4_ADDR(&gw, 127,0,0,1); + IP4_ADDR(&ipaddr, 127,0,0,1); + IP4_ADDR(&netmask, 255,0,0,0); + + netif_add(&ecos_loopif, &ipaddr, &netmask, &gw, NULL, loopif_init, + tcpip_input); +#endif + +#if LWIP_SLIP + lwip_set_addr(&mynetif); + slipif_init(&mynetif); + netif_set_default(&mynetif); +#elif PPP_SUPPORT + pppInit(); +#if PAP_SUPPORT || CHAP_SUPPORT + pppSetAuth(PPPAUTHTYPE_PAP, PPP_USER, PPP_PASS); +#endif + pppOpen(sio_open(2), pppMyCallback, NULL); +#else + ecosglue_init(); +#endif + return 0; +} + +void +lwip_set_addr(struct netif *netif) +{ + struct ip_addr ipaddr, netmask, gw; + + IP_ADDR(&gw, CYGPKG_LWIP_SERV_ADDR); + IP_ADDR(&ipaddr, CYGPKG_LWIP_MY_ADDR); + IP_ADDR(&netmask, CYGPKG_LWIP_NETMASK); + netif_set_addr(netif, &ipaddr, &netmask, &gw); + netif->next = netif_list; + netif_list = netif; + + netif->input = tcpip_input; + //netif->input = ip_input; +} + +#ifdef CYGPKG_LWIP_ETH +//io eth stuff + +cyg_sem_t delivery; + +void +lwip_dsr_stuff(void) +{ + cyg_semaphore_post(&delivery); +} + +//Input thread signalled by DSR calls deliver() on low level drivers +static void +input_thread(void *arg) +{ + cyg_netdevtab_entry_t *t; + + for (;;) { + cyg_semaphore_wait(&delivery); + + for (t = &__NETDEVTAB__[0]; t != &__NETDEVTAB_END__; t++) { + struct eth_drv_sc *sc = (struct eth_drv_sc *)t->device_instance; + if (sc->state & ETH_DRV_NEEDS_DELIVERY) { +#if defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT) + cyg_bool was_ctrlc_int; +#endif + sc->state &= ~ETH_DRV_NEEDS_DELIVERY; +#if defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT) + was_ctrlc_int = HAL_CTRLC_CHECK((*sc->funs->int_vector)(sc), (int)sc); + if (!was_ctrlc_int) // Fall through and run normal code + +#endif + (sc->funs->deliver) (sc); + } + } + } + +} + +// Initialize all network devices +static void +init_hw_drivers(void) +{ + cyg_netdevtab_entry_t *t; + + for (t = &__NETDEVTAB__[0]; t != &__NETDEVTAB_END__; t++) { + if (t->init(t)) { + t->status = CYG_NETDEVTAB_STATUS_AVAIL; + } else { + // What to do if device init fails? + t->status = 0; // Device not [currently] available + } + } +} + +static void +arp_timer(void *arg) +{ + etharp_tmr(); + sys_timeout(ARP_TMR_INTERVAL, (sys_timeout_handler) arp_timer, NULL); +} + + +static void +ecosglue_init(void) +{ + cyg_semaphore_init(&delivery, 0); + init_hw_drivers(); + sys_thread_new(input_thread, (void*)0, CYGPKG_LWIP_ETH_THREAD_PRIORITY); + etharp_init(); + sys_timeout(ARP_TMR_INTERVAL, (sys_timeout_handler) arp_timer, NULL); +} + +#endif //CYGPKG_LWIP_ETH
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/ecos/sio.c @@ -0,0 +1,110 @@ +//========================================================================== +//####ECOSGPLCOPYRIGHTBEGIN#### +// ------------------------------------------- +// This file is part of eCos, the Embedded Configurable Operating System. +// Copyright (C) 2004 eCosCentric +// +// eCos is free software; you can redistribute it and/or modify it under +// the terms of the GNU General Public License as published by the Free +// Software Foundation; either version 2 or (at your option) any later version. +// +// eCos is distributed in the hope that it will be useful, but WITHOUT ANY +// WARRANTY; without even the implied warranty of MERCHANTABILITY or +// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +// for more details. +// +// You should have received a copy of the GNU General Public License along +// with eCos; if not, write to the Free Software Foundation, Inc., +// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. +// +// As a special exception, if other files instantiate templates or use macros +// or inline functions from this file, or you compile this file and link it +// with other works to produce a work based on this file, this file does not +// by itself cause the resulting work to be covered by the GNU General Public +// License. However the source code for this file must still be made available +// in accordance with section (3) of the GNU General Public License. +// +// This exception does not invalidate any other reasons why a work based on +// this file might be covered by the GNU General Public License. +// ------------------------------------------- +//####ECOSGPLCOPYRIGHTEND#### +//========================================================================== + +/* Serial operations for SLIP */ + +#include "lwip/opt.h" +#include "lwip/def.h" +#include "lwip/sys.h" +#include "lwip/netif.h" + +#include <cyg/io/io.h> +#include <cyg/io/config_keys.h> +#include <cyg/infra/diag.h> + +static cyg_io_handle_t ser; + +static int len; + +void +sio_send(char c,void * dev) +{ + len = 1; + cyg_io_write(*(cyg_io_handle_t*)dev, &c, &len); +} + +char +sio_recv(void * dev) +{ + char c; + len = 1; + cyg_io_read(*(cyg_io_handle_t *)dev, &c, &len); + return c; +} + +int +sio_write(void *dev, char *b, int size) +{ + int len = size; + cyg_io_write(*(cyg_io_handle_t*)dev, b, &len); + return len; +} + +int +sio_read(void *dev, char *b, int size) +{ + int len = size; + cyg_io_read(*(cyg_io_handle_t*)dev, b, &len); + + return len; +} + +void * +sio_open(int devnum) +{ + int res; + cyg_uint32 nb = 0, len = 4; + +#if LWIP_SLIP + #define SIODEV SLIP_DEV +#elif PPP_SUPPORT + #define SIODEV PPP_DEV +#endif + res = cyg_io_lookup(SIODEV, &ser); + if (res != ENOERR) + diag_printf("Cannot open %s\n", SIODEV); + + res = cyg_io_set_config(ser, CYG_IO_SET_CONFIG_READ_BLOCKING, &nb, &len); + res = cyg_io_set_config(ser, CYG_IO_SET_CONFIG_WRITE_BLOCKING, &nb, &len); + len = 4; + nb = 0xFFFFFFFF; + res = cyg_io_set_config(ser, CYG_IO_SET_CONFIG_SERIAL_FLOW_CONTROL_METHOD, &nb, &len); + if (res != ENOERR) + diag_printf("set_config flow_control returned an error\n"); + return &ser; +} + +void +sio_read_abort(void * dev) +{ + diag_printf("Abort called\n"); +}
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/ecos/sys_arch.c @@ -0,0 +1,275 @@ +//========================================================================== +//####ECOSGPLCOPYRIGHTBEGIN#### +// ------------------------------------------- +// This file is part of eCos, the Embedded Configurable Operating System. +// Copyright (C) 2004 eCosCentric +// +// eCos is free software; you can redistribute it and/or modify it under +// the terms of the GNU General Public License as published by the Free +// Software Foundation; either version 2 or (at your option) any later version. +// +// eCos is distributed in the hope that it will be useful, but WITHOUT ANY +// WARRANTY; without even the implied warranty of MERCHANTABILITY or +// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +// for more details. +// +// You should have received a copy of the GNU General Public License along +// with eCos; if not, write to the Free Software Foundation, Inc., +// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. +// +// As a special exception, if other files instantiate templates or use macros +// or inline functions from this file, or you compile this file and link it +// with other works to produce a work based on this file, this file does not +// by itself cause the resulting work to be covered by the GNU General Public +// License. However the source code for this file must still be made available +// in accordance with section (3) of the GNU General Public License. +// +// This exception does not invalidate any other reasons why a work based on +// this file might be covered by the GNU General Public License. +// ------------------------------------------- +//####ECOSGPLCOPYRIGHTEND#### +//========================================================================== +// Author: Jani Monoses +// Contributors: Claudio Leonel Salvadori +// + +/* + * This file implements the eCos specific sys_arch functions used by lwIP + */ + +#include "lwip/opt.h" +#include "arch/sys_arch.h" +#include "lwip/sys.h" +#include "lwip/def.h" + +#define tick_to_msec(tick) ((u16_t)((tick)*10+1)) +#define msec_to_tick(msec) ((cyg_tick_count_t)(msec+9)/10) + +/* We use a common var mempool for allocating semaphores, mboxes and threads... */ +static char memvar[CYGNUM_LWIP_VARMEMPOOL_SIZE]; +static cyg_mempool_var var_mempool; +static cyg_handle_t var_mempool_h; + + +#define SYS_THREADS 2 /* polling thread and tcpip_thread */ + +#define THREAD_COUNT (CYGNUM_LWIP_APP_THREADS + SYS_THREADS) +static char memfix[CYGNUM_LWIP_THREAD_STACK_SIZE * THREAD_COUNT]; + +/* List of threads: associate eCos thread info with lwIP timeout info */ +struct lwip_thread { + struct lwip_thread * next; + struct sys_timeouts to; + cyg_handle_t th; + cyg_thread t; +} *threads; + +/* + * Timeout for threads which were not created by sys_thread_new + * usually "main" + */ +struct sys_timeouts to; + +/* + * Set up memory pools and threads + */ +void sys_init(void) +{ + cyg_mempool_var_create(memvar, sizeof(memvar), &var_mempool_h, &var_mempool); + + threads = NULL; + to.next = NULL; +} + +/* + * Create a new mbox.If no memory is available return NULL + */ +sys_mbox_t sys_mbox_new(void) +{ + cyg_mbox * mbox; + cyg_handle_t m; + mbox = (cyg_mbox *)cyg_mempool_var_try_alloc(var_mempool_h, sizeof(cyg_mbox)); + + /* out of memory? */ + if(!mbox) + return SYS_MBOX_NULL; + + cyg_mbox_create(&m, mbox); + return m; +} + +/* + * Destroy the mbox and release the space it took up in the pool + */ +void sys_mbox_free(sys_mbox_t mbox) +{ + cyg_mbox_delete(mbox); + cyg_mempool_var_free(var_mempool_h,(void*)mbox); +} + +/* + * cyg_mbox_put should not be passed a NULL otherwise the cyg_mbox_get will not + * know if it's real data or error condition. But lwIP does pass NULL on occasion + * in cases when maybe using a semaphore would be better. So this dummy_msg replaces + * NULL data + */ + +int dummy_msg = 1; + +/* + * Post data to a mbox. + */ +void sys_mbox_post(sys_mbox_t mbox, void *data) +{ + if (!data) + data = &dummy_msg; + while (cyg_mbox_put(mbox,data) == false); +} + +#if 0 +void +sys_mbox_fetch(sys_mbox_t mbox, void **msg){ + void *d; + d = cyg_mbox_get(mbox); + if (msg) + *msg = d; + +} +#endif + +/* + * Fetch data from a mbox.Wait for at most timeout millisecs + * Return -1 if timed out otherwise time spent waiting. + */ +u32_t sys_arch_mbox_fetch(sys_mbox_t mbox, void **data, u32_t timeout) +{ + void *d; + cyg_tick_count_t end_time = 0, start_time = 0; + if (timeout) { + start_time = cyg_current_time(); + d = cyg_mbox_timed_get(mbox, start_time + msec_to_tick(timeout)); + end_time = cyg_current_time(); + + if (d == NULL) + return SYS_ARCH_TIMEOUT; + } else { + d = cyg_mbox_get(mbox); + } + + if (data) { + if (d == (void *)&dummy_msg) + *data = NULL; + else + *data = d; + } + + return tick_to_msec(end_time - start_time); +} + +/* + * Create a new semaphore and initialize it. + * If no memory is available return NULL + */ +sys_sem_t sys_sem_new(u8_t count) +{ + sys_sem_t sem; + + sem = (cyg_sem_t *)cyg_mempool_var_try_alloc(var_mempool_h, sizeof(cyg_sem_t)); + /* out of memory? */ + if(!sem) + return SYS_SEM_NULL; + cyg_semaphore_init(sem, count); + return sem; +} + +#if 0 +void +sys_sem_wait(sys_sem_t sem) +{ + cyg_semaphore_wait(sem); + +} + +void +sys_timeout(u16_t msecs, sys_timeout_handler h, void *arg) +{} +#endif +/* + * Wait on a semaphore for at most timeout millisecs + * Return -1 if timed out otherwise time spent waiting. + */ +u32_t sys_arch_sem_wait(sys_sem_t sem, u32_t timeout) +{ + cyg_bool_t r; + cyg_tick_count_t end_time = 0, start_time = 0; + + if (timeout) { + start_time = cyg_current_time(); + r = cyg_semaphore_timed_wait(sem, start_time + msec_to_tick(timeout)); + end_time = cyg_current_time(); + + if (r == false) { + return SYS_ARCH_TIMEOUT; + } + } else { + cyg_semaphore_wait(sem); + } + + return tick_to_msec(end_time - start_time); +} + +/* + * Signal a semaphore + */ +void sys_sem_signal(sys_sem_t sem) +{ + cyg_semaphore_post(sem); +} + +/* + * Destroy the semaphore and release the space it took up in the pool + */ +void sys_sem_free(sys_sem_t sem) +{ + cyg_semaphore_destroy(sem); + cyg_mempool_var_free(var_mempool_h,(void*)sem); +} + +/* + * Create new thread + */ +sys_thread_t sys_thread_new(void (*function) (void *arg), void *arg,int prio) +{ + struct lwip_thread * nt; + void * stack; + static int thread_count = 0; + nt = (struct lwip_thread *)cyg_mempool_var_alloc(var_mempool_h, sizeof(struct lwip_thread)); + + nt->next = threads; + nt->to.next = NULL; + + threads = nt; + + stack = (void *)(memfix+CYGNUM_LWIP_THREAD_STACK_SIZE*thread_count++); + cyg_thread_create(prio, (cyg_thread_entry_t *)function, (cyg_addrword_t)arg, + (char *)arg , stack, CYGNUM_LWIP_THREAD_STACK_SIZE, &(nt->th), &(nt->t) ); + + cyg_thread_resume(nt->th); + return NULL; +} + +/* + * Return current thread's timeout info + */ +struct sys_timeouts *sys_arch_timeouts(void) +{ + cyg_handle_t ct; + struct lwip_thread *t; + + ct = cyg_thread_self(); + for(t = threads; t; t = t->next) + if (t->th == ct) + return &(t->to); + + return &to; +}
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/etharp.c @@ -0,0 +1,791 @@ +/** + * @file + * Address Resolution Protocol module for IP over Ethernet + * + * Functionally, ARP is divided into two parts. The first maps an IP address + * to a physical address when sending a packet, and the second part answers + * requests from other machines for our physical address. + * + * This implementation complies with RFC 826 (Ethernet ARP) and supports + * Gratuitious ARP from RFC3220 (IP Mobility Support for IPv4) section 4.6. + */ + +/* + * Copyright (c) 2001-2003 Swedish Institute of Computer Science. + * Copyright (c) 2003-2004 Leon Woestenberg <leon.woestenberg@axon.tv> + * Copyright (c) 2003-2004 Axon Digital Design B.V., The Netherlands. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + +/** + * TODO: + * - pbufs should be sent from the queue once an ARP entry state + * goes from PENDING to STABLE. + * - Non-PENDING entries MUST NOT have queued packets. + */ + +/* + * TODO: + * +RFC 3220 4.6 IP Mobility Support for IPv4 January 2002 + + - A Gratuitous ARP [45] is an ARP packet sent by a node in order + to spontaneously cause other nodes to update an entry in their + ARP cache. A gratuitous ARP MAY use either an ARP Request or + an ARP Reply packet. In either case, the ARP Sender Protocol + Address and ARP Target Protocol Address are both set to the IP + address of the cache entry to be updated, and the ARP Sender + Hardware Address is set to the link-layer address to which this + cache entry should be updated. When using an ARP Reply packet, + the Target Hardware Address is also set to the link-layer + address to which this cache entry should be updated (this field + is not used in an ARP Request packet). + + In either case, for a gratuitous ARP, the ARP packet MUST be + transmitted as a local broadcast packet on the local link. As + specified in [36], any node receiving any ARP packet (Request + or Reply) MUST update its local ARP cache with the Sender + Protocol and Hardware Addresses in the ARP packet, if the + receiving node has an entry for that IP address already in its + ARP cache. This requirement in the ARP protocol applies even + for ARP Request packets, and for ARP Reply packets that do not + match any ARP Request transmitted by the receiving node [36]. +* + My suggestion would be to send a ARP request for our newly obtained + address upon configuration of an Ethernet interface. + +*/ + +#include "lwip/opt.h" +#include "lwip/inet.h" +#include "netif/etharp.h" +#include "lwip/ip.h" +#include "lwip/stats.h" + +/* ARP needs to inform DHCP of any ARP replies? */ +#if (LWIP_DHCP && DHCP_DOES_ARP_CHECK) +# include "lwip/dhcp.h" +#endif + +/* allows new queueing code to be disabled (0) for regression testing */ +#define ARP_NEW_QUEUE 1 + +/** the time an ARP entry stays valid after its last update, (120 * 10) seconds = 20 minutes. */ +#define ARP_MAXAGE 120 +/** the time an ARP entry stays pending after first request, (1 * 10) seconds = 10 seconds. */ +#define ARP_MAXPENDING 1 + +#define HWTYPE_ETHERNET 1 + +/** ARP message types */ +#define ARP_REQUEST 1 +#define ARP_REPLY 2 + +#define ARPH_HWLEN(hdr) (ntohs((hdr)->_hwlen_protolen) >> 8) +#define ARPH_PROTOLEN(hdr) (ntohs((hdr)->_hwlen_protolen) & 0xff) + +#define ARPH_HWLEN_SET(hdr, len) (hdr)->_hwlen_protolen = htons(ARPH_PROTOLEN(hdr) | ((len) << 8)) +#define ARPH_PROTOLEN_SET(hdr, len) (hdr)->_hwlen_protolen = htons((len) | (ARPH_HWLEN(hdr) << 8)) + +enum etharp_state { + ETHARP_STATE_EMPTY, + ETHARP_STATE_PENDING, + ETHARP_STATE_STABLE, + /** @internal convenience transitional state used in etharp_tmr() */ + ETHARP_STATE_EXPIRED +}; + +struct etharp_entry { + struct ip_addr ipaddr; + struct eth_addr ethaddr; + enum etharp_state state; +#if ARP_QUEUEING + /** + * Pointer to queue of pending outgoing packets on this ARP entry. + * Must be at most a single packet for now. */ + struct pbuf *p; +#endif + u8_t ctime; +}; + +static const struct eth_addr ethbroadcast = {{0xff,0xff,0xff,0xff,0xff,0xff}}; +static struct etharp_entry arp_table[ARP_TABLE_SIZE]; + +static s8_t find_arp_entry(void); +/** ask update_arp_entry() to add instead of merely update an ARP entry */ +#define ARP_INSERT_FLAG 1 +static struct pbuf *update_arp_entry(struct netif *netif, struct ip_addr *ipaddr, struct eth_addr *ethaddr, u8_t flags); +/** + * Initializes ARP module. + */ +void +etharp_init(void) +{ + s8_t i; + /* clear ARP entries */ + for(i = 0; i < ARP_TABLE_SIZE; ++i) { + arp_table[i].state = ETHARP_STATE_EMPTY; +#if ARP_QUEUEING + arp_table[i].p = NULL; +#endif + arp_table[i].ctime = 0; + } +} + +/** + * Clears expired entries in the ARP table. + * + * This function should be called every ETHARP_TMR_INTERVAL microseconds (10 seconds), + * in order to expire entries in the ARP table. + */ +void +etharp_tmr(void) +{ + s8_t i; + + LWIP_DEBUGF(ETHARP_DEBUG, ("etharp_timer\n")); + /* remove expired entries from the ARP table */ + for (i = 0; i < ARP_TABLE_SIZE; ++i) { + arp_table[i].ctime++; + /* a resolved/stable entry? */ + if ((arp_table[i].state == ETHARP_STATE_STABLE) && + /* entry has become old? */ + (arp_table[i].ctime >= ARP_MAXAGE)) { + LWIP_DEBUGF(ETHARP_DEBUG, ("etharp_timer: expired stable entry %u.\n", i)); + arp_table[i].state = ETHARP_STATE_EXPIRED; + /* an unresolved/pending entry? */ + } else if ((arp_table[i].state == ETHARP_STATE_PENDING) && + /* entry unresolved/pending for too long? */ + (arp_table[i].ctime >= ARP_MAXPENDING)) { + LWIP_DEBUGF(ETHARP_DEBUG, ("etharp_timer: expired pending entry %u.\n", i)); + arp_table[i].state = ETHARP_STATE_EXPIRED; + } + /* clean up entries that have just been expired */ + if (arp_table[i].state == ETHARP_STATE_EXPIRED) { +#if ARP_QUEUEING + /* and empty packet queue */ + if (arp_table[i].p != NULL) { + /* remove all queued packets */ + LWIP_DEBUGF(ETHARP_DEBUG, ("etharp_timer: freeing entry %u, packet queue %p.\n", i, (void *)(arp_table[i].p))); + pbuf_free(arp_table[i].p); + arp_table[i].p = NULL; + } +#endif + /* recycle entry for re-use */ + arp_table[i].state = ETHARP_STATE_EMPTY; + } + } +} + +/** + * Return an empty ARP entry (possibly recycling the oldest stable entry). + * + * @return The ARP entry index that is available, ERR_MEM if no usable + * entry is found. + */ +static s8_t +find_arp_entry(void) +{ + s8_t i, j; + u8_t maxtime = 0; + + j = ARP_TABLE_SIZE; + /* search ARP table for an unused or old entry */ + for (i = 0; i < ARP_TABLE_SIZE; ++i) { + /* empty entry? */ + if (arp_table[i].state == ETHARP_STATE_EMPTY) { + LWIP_DEBUGF(ETHARP_DEBUG, ("find_arp_entry: returning empty entry %u\n", i)); + return i; + /* stable entry? */ + } else if (arp_table[i].state == ETHARP_STATE_STABLE) { + /* remember entry with oldest stable entry in j */ + if (arp_table[i].ctime >= maxtime) maxtime = arp_table[j = i].ctime; + } + } + /* no empty entry found? */ + if (i == ARP_TABLE_SIZE) { + LWIP_DEBUGF(ETHARP_DEBUG, ("find_arp_entry: found oldest stable entry %u\n", j)); + /* fall-back to oldest stable */ + i = j; + } + /* no available entry found? */ + if (i == ARP_TABLE_SIZE) { + LWIP_DEBUGF(ETHARP_DEBUG, ("find_arp_entry: no replacable entry could be found\n")); + /* return failure */ + return ERR_MEM; + } + + /* clean up the recycled stable entry */ + if (arp_table[i].state == ETHARP_STATE_STABLE) { +#if ARP_QUEUEING + /* and empty the packet queue */ + if (arp_table[i].p != NULL) { + /* remove all queued packets */ + LWIP_DEBUGF(ETHARP_DEBUG, ("find_arp_entry: freeing entry %u, packet queue %p.\n", i, (void *)(arp_table[i].p))); + pbuf_free(arp_table[i].p); + arp_table[i].p = NULL; + } +#endif + LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("find_arp_entry: recycling oldest stable entry %u\n", i)); + arp_table[i].state = ETHARP_STATE_EMPTY; + } + LWIP_DEBUGF(ETHARP_DEBUG, ("find_arp_entry: returning %u\n", i)); + return i; +} + +/** + * Update (or insert) a IP/MAC address pair in the ARP cache. + * + * If a pending entry is resolved, any queued packets will be sent + * at this point. + * + * @param ipaddr IP address of the inserted ARP entry. + * @param ethaddr Ethernet address of the inserted ARP entry. + * @param flags Defines behaviour: + * - ARP_INSERT_FLAG Allows ARP to insert this as a new item. If not specified, + * only existing ARP entries will be updated. + * + * @return pbuf If non-NULL, a packet that was queued on a pending entry. + * You should sent it and must call pbuf_free() afterwards. + * + * @see pbuf_free() + */ +static struct pbuf * +update_arp_entry(struct netif *netif, struct ip_addr *ipaddr, struct eth_addr *ethaddr, u8_t flags) +{ + s8_t i, k; + LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE | 3, ("update_arp_entry()\n")); + LWIP_ASSERT("netif->hwaddr_len != 0", netif->hwaddr_len != 0); + LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("update_arp_entry: %u.%u.%u.%u - %02x:%02x:%02x:%02x:%02x:%02x\n", + ip4_addr1(ipaddr), ip4_addr2(ipaddr), ip4_addr3(ipaddr), ip4_addr4(ipaddr), + ethaddr->addr[0], ethaddr->addr[1], ethaddr->addr[2], + ethaddr->addr[3], ethaddr->addr[4], ethaddr->addr[5])); + /* do not update for 0.0.0.0 addresses */ + if (ipaddr->addr == 0) { + LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("update_arp_entry: will not add 0.0.0.0 to ARP cache\n")); + return NULL; + } + /* Walk through the ARP mapping table and try to find an entry to + update. If none is found, the IP -> MAC address mapping is + inserted in the ARP table. */ + for (i = 0; i < ARP_TABLE_SIZE; ++i) { + /* Check if the source IP address of the incoming packet matches + the IP address in this ARP table entry. */ + if (arp_table[i].state != ETHARP_STATE_EMPTY && + ip_addr_cmp(ipaddr, &arp_table[i].ipaddr)) { + /* pending entry? */ + if (arp_table[i].state == ETHARP_STATE_PENDING) { + LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("update_arp_entry: pending entry %u goes stable\n", i)); + /* A pending entry was found, mark it stable */ + arp_table[i].state = ETHARP_STATE_STABLE; + /* fall-through to next if */ + } + /* stable entry? (possibly just marked to become stable) */ + if (arp_table[i].state == ETHARP_STATE_STABLE) { +#if ARP_QUEUEING + struct pbuf *p; + struct eth_hdr *ethhdr; +#endif + LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("update_arp_entry: updating stable entry %u\n", i)); + /* An old entry found, update this and return. */ + for (k = 0; k < netif->hwaddr_len; ++k) { + arp_table[i].ethaddr.addr[k] = ethaddr->addr[k]; + } + /* reset time stamp */ + arp_table[i].ctime = 0; +/* this is where we will send out queued packets! */ +#if ARP_QUEUEING + while (arp_table[i].p != NULL) { + /* get the first packet on the queue (if any) */ + p = arp_table[i].p; + /* remember (and reference) remainder of queue */ + arp_table[i].p = pbuf_dequeue(p); + /* fill-in Ethernet header */ + ethhdr = p->payload; + for (k = 0; k < netif->hwaddr_len; ++k) { + ethhdr->dest.addr[k] = ethaddr->addr[k]; + ethhdr->src.addr[k] = netif->hwaddr[k]; + } + ethhdr->type = htons(ETHTYPE_IP); + LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("update_arp_entry: sending queued IP packet %p.\n", (void *)p)); + /* send the queued IP packet */ + netif->linkoutput(netif, p); + /* free the queued IP packet */ + pbuf_free(p); + } +#endif + /* IP addresses should only occur once in the ARP entry, we are done */ + return NULL; + } + } /* if STABLE */ + } /* for all ARP entries */ + + /* no matching ARP entry was found */ + LWIP_ASSERT("update_arp_entry: i == ARP_TABLE_SIZE", i == ARP_TABLE_SIZE); + + LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("update_arp_entry: IP address not yet in table\n")); + /* allowed to insert a new entry? */ + if (flags & ARP_INSERT_FLAG) + { + LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("update_arp_entry: adding entry to table\n")); + /* find an empty or old entry. */ + i = find_arp_entry(); + if (i == ERR_MEM) { + LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("update_arp_entry: no available entry found\n")); + return NULL; + } + /* set IP address */ + ip_addr_set(&arp_table[i].ipaddr, ipaddr); + /* set Ethernet hardware address */ + for (k = 0; k < netif->hwaddr_len; ++k) { + arp_table[i].ethaddr.addr[k] = ethaddr->addr[k]; + } + /* reset time-stamp */ + arp_table[i].ctime = 0; + /* mark as stable */ + arp_table[i].state = ETHARP_STATE_STABLE; + /* no queued packet */ +#if ARP_QUEUEING + arp_table[i].p = NULL; +#endif + } + else + { + LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("update_arp_entry: no matching stable entry to update\n")); + } + return NULL; +} + +/** + * Updates the ARP table using the given IP packet. + * + * Uses the incoming IP packet's source address to update the + * ARP cache for the local network. The function does not alter + * or free the packet. This function must be called before the + * packet p is passed to the IP layer. + * + * @param netif The lwIP network interface on which the IP packet pbuf arrived. + * @param pbuf The IP packet that arrived on netif. + * + * @return NULL + * + * @see pbuf_free() + */ +struct pbuf * +etharp_ip_input(struct netif *netif, struct pbuf *p) +{ + struct ethip_hdr *hdr; + + /* Only insert an entry if the source IP address of the + incoming IP packet comes from a host on the local network. */ + hdr = p->payload; + /* source is on local network? */ + if (!ip_addr_maskcmp(&(hdr->ip.src), &(netif->ip_addr), &(netif->netmask))) { + /* do nothing */ + return NULL; + } + + LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("etharp_ip_input: updating ETHARP table.\n")); + /* update ARP table, ask to insert entry */ + update_arp_entry(netif, &(hdr->ip.src), &(hdr->eth.src), ARP_INSERT_FLAG); + return NULL; +} + + +/** + * Responds to ARP requests to us. Upon ARP replies to us, add entry to cache + * send out queued IP packets. Updates cache with snooped address pairs. + * + * Should be called for incoming ARP packets. The pbuf in the argument + * is freed by this function. + * + * @param netif The lwIP network interface on which the ARP packet pbuf arrived. + * @param pbuf The ARP packet that arrived on netif. Is freed by this function. + * @param ethaddr Ethernet address of netif. + * + * @return NULL + * + * @see pbuf_free() + */ +struct pbuf * +etharp_arp_input(struct netif *netif, struct eth_addr *ethaddr, struct pbuf *p) +{ + struct etharp_hdr *hdr; + /* these are aligned properly, whereas the ARP header fields might not be */ + struct ip_addr sipaddr, dipaddr; + u8_t i; + u8_t for_us; + + /* drop short ARP packets */ + if (p->tot_len < sizeof(struct etharp_hdr)) { + LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE | 1, ("etharp_arp_input: packet dropped, too short (%d/%d)\n", p->tot_len, sizeof(struct etharp_hdr))); + pbuf_free(p); + return NULL; + } + + hdr = p->payload; + + /* get aligned copies of addresses */ + *(struct ip_addr2 *)&sipaddr = hdr->sipaddr; + *(struct ip_addr2 *)&dipaddr = hdr->dipaddr; + + /* this interface is not configured? */ + if (netif->ip_addr.addr == 0) { + for_us = 0; + } else { + /* ARP packet directed to us? */ + for_us = ip_addr_cmp(&dipaddr, &(netif->ip_addr)); + } + + /* ARP message directed to us? */ + if (for_us) { + /* add IP address in ARP cache; assume requester wants to talk to us. + * can result in directly sending the queued packets for this host. */ + update_arp_entry(netif, &sipaddr, &(hdr->shwaddr), ARP_INSERT_FLAG); + /* ARP message not directed to us? */ + } else { + /* update the source IP address in the cache, if present */ + update_arp_entry(netif, &sipaddr, &(hdr->shwaddr), 0); + } + + /* now act on the message itself */ + switch (htons(hdr->opcode)) { + /* ARP request? */ + case ARP_REQUEST: + /* ARP request. If it asked for our address, we send out a + * reply. In any case, we time-stamp any existing ARP entry, + * and possiby send out an IP packet that was queued on it. */ + + LWIP_DEBUGF (ETHARP_DEBUG | DBG_TRACE, ("etharp_arp_input: incoming ARP request\n")); + /* ARP request for our address? */ + if (for_us) { + + LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("etharp_arp_input: replying to ARP request for our IP address\n")); + /* re-use pbuf to send ARP reply */ + hdr->opcode = htons(ARP_REPLY); + + hdr->dipaddr = hdr->sipaddr; + hdr->sipaddr = *(struct ip_addr2 *)&netif->ip_addr; + + for(i = 0; i < netif->hwaddr_len; ++i) { + hdr->dhwaddr.addr[i] = hdr->shwaddr.addr[i]; + hdr->shwaddr.addr[i] = ethaddr->addr[i]; + hdr->ethhdr.dest.addr[i] = hdr->dhwaddr.addr[i]; + hdr->ethhdr.src.addr[i] = ethaddr->addr[i]; + } + + hdr->hwtype = htons(HWTYPE_ETHERNET); + ARPH_HWLEN_SET(hdr, netif->hwaddr_len); + + hdr->proto = htons(ETHTYPE_IP); + ARPH_PROTOLEN_SET(hdr, sizeof(struct ip_addr)); + + hdr->ethhdr.type = htons(ETHTYPE_ARP); + /* return ARP reply */ + netif->linkoutput(netif, p); + /* we are not configured? */ + } else if (netif->ip_addr.addr == 0) { + /* { for_us == 0 and netif->ip_addr.addr == 0 } */ + LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("etharp_arp_input: we are unconfigured, ARP request ignored.\n")); + /* request was not directed to us */ + } else { + /* { for_us == 0 and netif->ip_addr.addr != 0 } */ + LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("etharp_arp_input: ARP request was not for us.\n")); + } + break; + case ARP_REPLY: + /* ARP reply. We insert or update the ARP table later. */ + LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("etharp_arp_input: incoming ARP reply\n")); +#if (LWIP_DHCP && DHCP_DOES_ARP_CHECK) + /* DHCP wants to know about ARP replies to our wanna-have-address */ + if (for_us) dhcp_arp_reply(netif, &sipaddr); +#endif + break; + default: + LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("etharp_arp_input: ARP unknown opcode type %d\n", htons(hdr->opcode))); + break; + } + /* free ARP packet */ + pbuf_free(p); + p = NULL; + /* nothing to send, we did it! */ + return NULL; +} + +/** + * Resolve and fill-in Ethernet address header for outgoing packet. + * + * If ARP has the Ethernet address in cache, the given packet is + * returned, ready to be sent. + * + * If ARP does not have the Ethernet address in cache the packet is + * queued (if enabled and space available) and a ARP request is sent. + * This ARP request is returned as a pbuf, which should be sent by + * the caller. + * + * A returned non-NULL packet should be sent by the caller. + * + * If ARP failed to allocate resources, NULL is returned. + * + * @param netif The lwIP network interface which the IP packet will be sent on. + * @param ipaddr The IP address of the packet destination. + * @param pbuf The pbuf(s) containing the IP packet to be sent. + * + * @return If non-NULL, a packet ready to be sent by caller. + * + */ +struct pbuf * +etharp_output(struct netif *netif, struct ip_addr *ipaddr, struct pbuf *q) +{ + struct eth_addr *dest, *srcaddr, mcastaddr; + struct eth_hdr *ethhdr; + s8_t i; + + /* make room for Ethernet header */ + if (pbuf_header(q, sizeof(struct eth_hdr)) != 0) { + /* The pbuf_header() call shouldn't fail, and we'll just bail + out if it does.. */ + LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE | 2, ("etharp_output: could not allocate room for header.\n")); + LINK_STATS_INC(link.lenerr); + return NULL; + } + + /* assume unresolved Ethernet address */ + dest = NULL; + /* Construct Ethernet header. Start with looking up deciding which + MAC address to use as a destination address. Broadcasts and + multicasts are special, all other addresses are looked up in the + ARP table. */ + + /* destination IP address is an IP broadcast address? */ + if (ip_addr_isany(ipaddr) || ip_addr_isbroadcast(ipaddr, netif)) { + /* broadcast on Ethernet also */ + dest = (struct eth_addr *)ðbroadcast; + } + /* destination IP address is an IP multicast address? */ + else if (ip_addr_ismulticast(ipaddr)) { + /* Hash IP multicast address to MAC address. */ + mcastaddr.addr[0] = 0x01; + mcastaddr.addr[1] = 0x00; + mcastaddr.addr[2] = 0x5e; + mcastaddr.addr[3] = ip4_addr2(ipaddr) & 0x7f; + mcastaddr.addr[4] = ip4_addr3(ipaddr); + mcastaddr.addr[5] = ip4_addr4(ipaddr); + /* destination Ethernet address is multicast */ + dest = &mcastaddr; + } + /* destination IP address is an IP unicast address */ + else { + /* destination IP network address not on local network? + * IP layer wants us to forward to the default gateway */ + if (!ip_addr_maskcmp(ipaddr, &(netif->ip_addr), &(netif->netmask))) { + /* interface has default gateway? */ + if (netif->gw.addr != 0) + { + /* route to default gateway IP address */ + ipaddr = &(netif->gw); + } + /* no gateway available? */ + else + { + /* IP destination address outside local network, but no gateway available */ + /* { packet is discarded } */ + return NULL; + } + } + + /* Ethernet address for IP destination address is in ARP cache? */ + for (i = 0; i < ARP_TABLE_SIZE; ++i) { + /* match found? */ + if (arp_table[i].state == ETHARP_STATE_STABLE && + ip_addr_cmp(ipaddr, &arp_table[i].ipaddr)) { + dest = &arp_table[i].ethaddr; + break; + } + } + /* could not find the destination Ethernet address in ARP cache? */ + if (dest == NULL) { + /* ARP query for the IP address, submit this IP packet for queueing */ + /* TODO: How do we handle netif->ipaddr == ipaddr? */ + etharp_query(netif, ipaddr, q); + /* { packet was queued (ERR_OK), or discarded } */ + /* return nothing */ + return NULL; + } + /* destination Ethernet address resolved from ARP cache */ + else + { + /* fallthrough */ + } + } + + /* destination Ethernet address known */ + if (dest != NULL) { + /* obtain source Ethernet address of the given interface */ + srcaddr = (struct eth_addr *)netif->hwaddr; + + /* A valid IP->MAC address mapping was found, fill in the + * Ethernet header for the outgoing packet */ + ethhdr = q->payload; + + for(i = 0; i < netif->hwaddr_len; i++) { + ethhdr->dest.addr[i] = dest->addr[i]; + ethhdr->src.addr[i] = srcaddr->addr[i]; + } + + ethhdr->type = htons(ETHTYPE_IP); + /* return the outgoing packet */ + return q; + } + /* never reached; here for safety */ + return NULL; +} + +/** + * Send an ARP request for the given IP address. + * + * Sends an ARP request for the given IP address, unless + * a request for this address is already pending. Optionally + * queues an outgoing packet on the resulting ARP entry. + * + * @param netif The lwIP network interface where ipaddr + * must be queried for. + * @param ipaddr The IP address to be resolved. + * @param q If non-NULL, a pbuf that must be queued on the + * ARP entry for the ipaddr IP address. + * + * @return NULL. + * + * @note Might be used in the future by manual IP configuration + * as well. + * + * TODO: use the ctime field to see how long ago an ARP request was sent, + * possibly retry. + */ +err_t etharp_query(struct netif *netif, struct ip_addr *ipaddr, struct pbuf *q) +{ + struct eth_addr *srcaddr; + struct etharp_hdr *hdr; + err_t result = ERR_OK; + s8_t i; + u8_t perform_arp_request = 1; + /* prevent 'unused argument' warning if ARP_QUEUEING == 0 */ + (void)q; + srcaddr = (struct eth_addr *)netif->hwaddr; + /* bail out if this IP address is pending */ + for (i = 0; i < ARP_TABLE_SIZE; ++i) { + if (arp_table[i].state != ETHARP_STATE_EMPTY && + ip_addr_cmp(ipaddr, &arp_table[i].ipaddr)) { + if (arp_table[i].state == ETHARP_STATE_PENDING) { + LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE | DBG_STATE, ("etharp_query: requested IP already pending as entry %u\n", i)); + /* break out of for-loop, user may wish to queue a packet on a pending entry */ + /* TODO: we will issue a new ARP request, which should not occur too often */ + /* we might want to run a faster timer on ARP to limit this */ + break; + } + else if (arp_table[i].state == ETHARP_STATE_STABLE) { + LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE | DBG_STATE, ("etharp_query: requested IP already stable as entry %u\n", i)); + /* User wishes to queue a packet on a stable entry (or does she want to send + * out the packet immediately, we will not know), so we force an ARP request. + * Upon response we will send out the queued packet in etharp_update(). + * + * Alternatively, we could accept the stable entry, and just send out the packet + * immediately. I chose to implement the former approach. + */ + perform_arp_request = (q?1:0); + break; + } + } + } + /* queried address not yet in ARP table? */ + if (i == ARP_TABLE_SIZE) { + LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("etharp_query: IP address not found in ARP table\n")); + /* find an available (unused or old) entry */ + i = find_arp_entry(); + /* bail out if no ARP entries are available */ + if (i == ERR_MEM) { + LWIP_DEBUGF(ETHARP_DEBUG | 2, ("etharp_query: no more ARP entries available. Should seldom occur.\n")); + return ERR_MEM; + } + /* i is available, create ARP entry */ + arp_table[i].state = ETHARP_STATE_PENDING; + ip_addr_set(&arp_table[i].ipaddr, ipaddr); + } + /* { i is now valid } */ +#if ARP_QUEUEING /* queue packet (even on a stable entry, see above) */ + /* copy any PBUF_REF referenced payloads into PBUF_RAM */ + q = pbuf_take(q); + pbuf_queue(arp_table[i].p, q); +#endif + /* ARP request? */ + if (perform_arp_request) + { + struct pbuf *p; + /* allocate a pbuf for the outgoing ARP request packet */ + p = pbuf_alloc(PBUF_LINK, sizeof(struct etharp_hdr), PBUF_RAM); + /* could allocate pbuf? */ + if (p != NULL) { + u8_t j; + LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("etharp_query: sending ARP request.\n")); + hdr = p->payload; + hdr->opcode = htons(ARP_REQUEST); + for (j = 0; j < netif->hwaddr_len; ++j) + { + hdr->shwaddr.addr[j] = srcaddr->addr[j]; + /* the hardware address is what we ask for, in + * a request it is a don't-care, we use 0's */ + hdr->dhwaddr.addr[j] = 0x00; + } + hdr->dipaddr = *(struct ip_addr2 *)ipaddr; + hdr->sipaddr = *(struct ip_addr2 *)&netif->ip_addr; + + hdr->hwtype = htons(HWTYPE_ETHERNET); + ARPH_HWLEN_SET(hdr, netif->hwaddr_len); + + hdr->proto = htons(ETHTYPE_IP); + ARPH_PROTOLEN_SET(hdr, sizeof(struct ip_addr)); + for (j = 0; j < netif->hwaddr_len; ++j) + { + hdr->ethhdr.dest.addr[j] = 0xff; + hdr->ethhdr.src.addr[j] = srcaddr->addr[j]; + } + hdr->ethhdr.type = htons(ETHTYPE_ARP); + /* send ARP query */ + result = netif->linkoutput(netif, p); + /* free ARP query packet */ + pbuf_free(p); + p = NULL; + } else { + result = ERR_MEM; + LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE | 2, ("etharp_query: could not allocate pbuf for ARP request.\n")); + } + } + return result; +}
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/loopif.c @@ -0,0 +1,119 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ +#include "lwip/opt.h" + +#if LWIP_HAVE_LOOPIF + +#include "netif/loopif.h" +#include "lwip/mem.h" + +#if defined(LWIP_DEBUG) && defined(LWIP_TCPDUMP) +#include "netif/tcpdump.h" +#endif /* LWIP_DEBUG && LWIP_TCPDUMP */ + +#include "lwip/tcp.h" +#include "lwip/ip.h" + +static void +loopif_input( void * arg ) +{ + struct netif *netif = (struct netif *)( ((void **)arg)[ 0 ] ); + struct pbuf *r = (struct pbuf *)( ((void **)arg)[ 1 ] ); + + mem_free( arg ); + netif -> input( r, netif ); +} + +static err_t +loopif_output(struct netif *netif, struct pbuf *p, + struct ip_addr *ipaddr) +{ + struct pbuf *q, *r; + char *ptr; + void **arg; + +#if defined(LWIP_DEBUG) && defined(LWIP_TCPDUMP) + tcpdump(p); +#endif /* LWIP_DEBUG && LWIP_TCPDUMP */ + + r = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM); + if (r != NULL) { + ptr = r->payload; + + for(q = p; q != NULL; q = q->next) { + memcpy(ptr, q->payload, q->len); + ptr += q->len; + } + + arg = mem_malloc( sizeof( void *[2])); + if( NULL == arg ) { + return ERR_MEM; + } + + arg[0] = netif; + arg[1] = r; + /** + * workaround (patch #1779) to try to prevent bug #2595: + * When connecting to "localhost" with the loopif interface, + * tcp_output doesn't get the opportunity to finnish sending the + * segment before tcp_process gets it, resulting in tcp_process + * referencing pcb->unacked-> which still is NULL. + * + * TODO: Is there still a race condition here? Leon + */ + sys_timeout( 1, loopif_input, arg ); + + return ERR_OK; + } + return ERR_MEM; +} + +err_t +loopif_init(struct netif *netif) +{ + netif->name[0] = 'l'; + netif->name[1] = 'o'; +#if 0 /** TODO: I think this should be enabled, or not? Leon */ + netif->input = loopif_input; +#endif + netif->output = loopif_output; + return ERR_OK; +} + +#endif /* LWIP_HAVE_LOOPIF */ + + + + + + +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/auth.c @@ -0,0 +1,927 @@ +/***************************************************************************** +* auth.c - Network Authentication and Phase Control program file. +* +* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. +* Copyright (c) 1997 by Global Election Systems Inc. All rights reserved. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY +* +* 03-01-01 Marc Boucher <marc@mbsi.ca> +* Ported to lwIP. +* 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc. +* Ported from public pppd code. +*****************************************************************************/ +/* + * auth.c - PPP authentication and phase control. + * + * Copyright (c) 1993 The Australian National University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by the Australian National University. The name of the University + * may not be used to endorse or promote products derived from this + * software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * Copyright (c) 1989 Carnegie Mellon University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Carnegie Mellon University. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +#include "ppp.h" +#if PPP_SUPPORT > 0 +#include "fsm.h" +#include "lcp.h" +#include "pap.h" +#include "chap.h" +#include "auth.h" +#include "ipcp.h" + +#if CBCP_SUPPORT > 0 +#include "cbcp.h" +#endif + +#include "pppdebug.h" + + +/*************************/ +/*** LOCAL DEFINITIONS ***/ +/*************************/ + +/* Bits in auth_pending[] */ +#define PAP_WITHPEER 1 +#define PAP_PEER 2 +#define CHAP_WITHPEER 4 +#define CHAP_PEER 8 + + + +/************************/ +/*** LOCAL DATA TYPES ***/ +/************************/ +/* Used for storing a sequence of words. Usually malloced. */ +struct wordlist { + struct wordlist *next; + char word[1]; +}; + + + +/***********************************/ +/*** LOCAL FUNCTION DECLARATIONS ***/ +/***********************************/ +extern char *crypt (const char *, const char *); + +/* Prototypes for procedures local to this file. */ + +static void network_phase (int); +static void check_idle (void *); +static void connect_time_expired (void *); +#if 0 +static int login (char *, char *, char **, int *); +#endif +static void logout (void); +static int null_login (int); +static int get_pap_passwd (int, char *, char *); +static int have_pap_secret (void); +static int have_chap_secret (char *, char *, u32_t); +static int ip_addr_check (u32_t, struct wordlist *); +#if 0 /* PAP_SUPPORT > 0 || CHAP_SUPPORT > 0 */ +static void set_allowed_addrs(int unit, struct wordlist *addrs); +static void free_wordlist (struct wordlist *); +#endif +#if CBCP_SUPPORT > 0 +static void callback_phase (int); +#endif + + +/******************************/ +/*** PUBLIC DATA STRUCTURES ***/ +/******************************/ + + +/*****************************/ +/*** LOCAL DATA STRUCTURES ***/ +/*****************************/ +#if PAP_SUPPORT > 0 || CHAP_SUPPORT > 0 +/* The name by which the peer authenticated itself to us. */ +static char peer_authname[MAXNAMELEN]; +#endif + +/* Records which authentication operations haven't completed yet. */ +static int auth_pending[NUM_PPP]; + +/* Set if we have successfully called login() */ +static int logged_in; + +/* Set if we have run the /etc/ppp/auth-up script. */ +static int did_authup; + +/* List of addresses which the peer may use. */ +static struct wordlist *addresses[NUM_PPP]; + +/* Number of network protocols which we have opened. */ +static int num_np_open; + +/* Number of network protocols which have come up. */ +static int num_np_up; + +#if PAP_SUPPORT > 0 || CHAP_SUPPORT > 0 +/* Set if we got the contents of passwd[] from the pap-secrets file. */ +static int passwd_from_file; +#endif + + + +/***********************************/ +/*** PUBLIC FUNCTION DEFINITIONS ***/ +/***********************************/ +/* + * An Open on LCP has requested a change from Dead to Establish phase. + * Do what's necessary to bring the physical layer up. + */ +void link_required(int unit) +{ + AUTHDEBUG((LOG_INFO, "link_required: %d\n", unit)); +} + +/* + * LCP has terminated the link; go to the Dead phase and take the + * physical layer down. + */ +void link_terminated(int unit) +{ + AUTHDEBUG((LOG_INFO, "link_terminated: %d\n", unit)); + + if (lcp_phase[unit] == PHASE_DEAD) + return; + if (logged_in) + logout(); + lcp_phase[unit] = PHASE_DEAD; + AUTHDEBUG((LOG_NOTICE, "Connection terminated.\n")); + pppMainWakeup(unit); +} + +/* + * LCP has gone down; it will either die or try to re-establish. + */ +void link_down(int unit) +{ + int i; + struct protent *protp; + + AUTHDEBUG((LOG_INFO, "link_down: %d\n", unit)); + if (did_authup) { + /* XXX Do link down processing. */ + did_authup = 0; + } + for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) { + if (!protp->enabled_flag) + continue; + if (protp->protocol != PPP_LCP && protp->lowerdown != NULL) + (*protp->lowerdown)(unit); + if (protp->protocol < 0xC000 && protp->close != NULL) + (*protp->close)(unit, "LCP down"); + } + num_np_open = 0; + num_np_up = 0; + if (lcp_phase[unit] != PHASE_DEAD) + lcp_phase[unit] = PHASE_TERMINATE; + pppMainWakeup(unit); +} + +/* + * The link is established. + * Proceed to the Dead, Authenticate or Network phase as appropriate. + */ +void link_established(int unit) +{ + int auth; + int i; + struct protent *protp; + lcp_options *wo = &lcp_wantoptions[unit]; + lcp_options *go = &lcp_gotoptions[unit]; +#if PAP_SUPPORT > 0 || CHAP_SUPPORT > 0 + lcp_options *ho = &lcp_hisoptions[unit]; +#endif + + AUTHDEBUG((LOG_INFO, "link_established: %d\n", unit)); + /* + * Tell higher-level protocols that LCP is up. + */ + for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) + if (protp->protocol != PPP_LCP && protp->enabled_flag + && protp->lowerup != NULL) + (*protp->lowerup)(unit); + + if (ppp_settings.auth_required && !(go->neg_chap || go->neg_upap)) { + /* + * We wanted the peer to authenticate itself, and it refused: + * treat it as though it authenticated with PAP using a username + * of "" and a password of "". If that's not OK, boot it out. + */ + if (!wo->neg_upap || !null_login(unit)) { + AUTHDEBUG((LOG_WARNING, "peer refused to authenticate\n")); + lcp_close(unit, "peer refused to authenticate"); + return; + } + } + + lcp_phase[unit] = PHASE_AUTHENTICATE; + auth = 0; +#if CHAP_SUPPORT > 0 + if (go->neg_chap) { + ChapAuthPeer(unit, ppp_settings.our_name, go->chap_mdtype); + auth |= CHAP_PEER; + } +#endif +#if PAP_SUPPORT > 0 && CHAP_SUPPORT > 0 + else +#endif +#if PAP_SUPPORT > 0 + if (go->neg_upap) { + upap_authpeer(unit); + auth |= PAP_PEER; + } +#endif +#if CHAP_SUPPORT > 0 + if (ho->neg_chap) { + ChapAuthWithPeer(unit, ppp_settings.user, ho->chap_mdtype); + auth |= CHAP_WITHPEER; + } +#endif +#if PAP_SUPPORT > 0 && CHAP_SUPPORT > 0 + else +#endif +#if PAP_SUPPORT > 0 + if (ho->neg_upap) { + if (ppp_settings.passwd[0] == 0) { + passwd_from_file = 1; + if (!get_pap_passwd(unit, ppp_settings.user, ppp_settings.passwd)) + AUTHDEBUG((LOG_ERR, "No secret found for PAP login\n")); + } + upap_authwithpeer(unit, ppp_settings.user, ppp_settings.passwd); + auth |= PAP_WITHPEER; + } +#endif + auth_pending[unit] = auth; + + if (!auth) + network_phase(unit); +} + + +/* + * The peer has failed to authenticate himself using `protocol'. + */ +void auth_peer_fail(int unit, u16_t protocol) +{ + AUTHDEBUG((LOG_INFO, "auth_peer_fail: %d proto=%X\n", unit, protocol)); + /* + * Authentication failure: take the link down + */ + lcp_close(unit, "Authentication failed"); +} + + +#if PAP_SUPPORT > 0 || CHAP_SUPPORT > 0 +/* + * The peer has been successfully authenticated using `protocol'. + */ +void auth_peer_success(int unit, u16_t protocol, char *name, int namelen) +{ + int pbit; + + AUTHDEBUG((LOG_INFO, "auth_peer_success: %d proto=%X\n", unit, protocol)); + switch (protocol) { + case PPP_CHAP: + pbit = CHAP_PEER; + break; + case PPP_PAP: + pbit = PAP_PEER; + break; + default: + AUTHDEBUG((LOG_WARNING, "auth_peer_success: unknown protocol %x\n", + protocol)); + return; + } + + /* + * Save the authenticated name of the peer for later. + */ + if (namelen > sizeof(peer_authname) - 1) + namelen = sizeof(peer_authname) - 1; + BCOPY(name, peer_authname, namelen); + peer_authname[namelen] = 0; + + /* + * If there is no more authentication still to be done, + * proceed to the network (or callback) phase. + */ + if ((auth_pending[unit] &= ~pbit) == 0) + network_phase(unit); +} + +/* + * We have failed to authenticate ourselves to the peer using `protocol'. + */ +void auth_withpeer_fail(int unit, u16_t protocol) +{ + int errCode = PPPERR_AUTHFAIL; + + AUTHDEBUG((LOG_INFO, "auth_withpeer_fail: %d proto=%X\n", unit, protocol)); + if (passwd_from_file) + BZERO(ppp_settings.passwd, MAXSECRETLEN); + /* + * XXX Warning: the unit number indicates the interface which is + * not necessarily the PPP connection. It works here as long + * as we are only supporting PPP interfaces. + */ + pppIOCtl(unit, PPPCTLS_ERRCODE, &errCode); + + /* + * We've failed to authenticate ourselves to our peer. + * He'll probably take the link down, and there's not much + * we can do except wait for that. + */ +} + +/* + * We have successfully authenticated ourselves with the peer using `protocol'. + */ +void auth_withpeer_success(int unit, u16_t protocol) +{ + int pbit; + + AUTHDEBUG((LOG_INFO, "auth_withpeer_success: %d proto=%X\n", unit, protocol)); + switch (protocol) { + case PPP_CHAP: + pbit = CHAP_WITHPEER; + break; + case PPP_PAP: + if (passwd_from_file) + BZERO(ppp_settings.passwd, MAXSECRETLEN); + pbit = PAP_WITHPEER; + break; + default: + AUTHDEBUG((LOG_WARNING, "auth_peer_success: unknown protocol %x\n", + protocol)); + pbit = 0; + } + + /* + * If there is no more authentication still being done, + * proceed to the network (or callback) phase. + */ + if ((auth_pending[unit] &= ~pbit) == 0) + network_phase(unit); +} +#endif + + +/* + * np_up - a network protocol has come up. + */ +void np_up(int unit, u16_t proto) +{ + AUTHDEBUG((LOG_INFO, "np_up: %d proto=%X\n", unit, proto)); + if (num_np_up == 0) { + AUTHDEBUG((LOG_INFO, "np_up: maxconnect=%d idle_time_limit=%d\n",ppp_settings.maxconnect,ppp_settings.idle_time_limit)); + /* + * At this point we consider that the link has come up successfully. + */ + if (ppp_settings.idle_time_limit > 0) + TIMEOUT(check_idle, NULL, ppp_settings.idle_time_limit); + + /* + * Set a timeout to close the connection once the maximum + * connect time has expired. + */ + if (ppp_settings.maxconnect > 0) + TIMEOUT(connect_time_expired, 0, ppp_settings.maxconnect); + } + ++num_np_up; +} + +/* + * np_down - a network protocol has gone down. + */ +void np_down(int unit, u16_t proto) +{ + AUTHDEBUG((LOG_INFO, "np_down: %d proto=%X\n", unit, proto)); + if (--num_np_up == 0 && ppp_settings.idle_time_limit > 0) { + UNTIMEOUT(check_idle, NULL); + } +} + +/* + * np_finished - a network protocol has finished using the link. + */ +void np_finished(int unit, u16_t proto) +{ + AUTHDEBUG((LOG_INFO, "np_finished: %d proto=%X\n", unit, proto)); + if (--num_np_open <= 0) { + /* no further use for the link: shut up shop. */ + lcp_close(0, "No network protocols running"); + } +} + +/* + * auth_reset - called when LCP is starting negotiations to recheck + * authentication options, i.e. whether we have appropriate secrets + * to use for authenticating ourselves and/or the peer. + */ +void auth_reset(int unit) +{ + lcp_options *go = &lcp_gotoptions[unit]; + lcp_options *ao = &lcp_allowoptions[0]; + ipcp_options *ipwo = &ipcp_wantoptions[0]; + u32_t remote; + + AUTHDEBUG((LOG_INFO, "auth_reset: %d\n", unit)); + ao->neg_upap = !ppp_settings.refuse_pap && (ppp_settings.passwd[0] != 0 || get_pap_passwd(unit, NULL, NULL)); + ao->neg_chap = !ppp_settings.refuse_chap && ppp_settings.passwd[0] != 0 /*have_chap_secret(ppp_settings.user, ppp_settings.remote_name, (u32_t)0)*/; + + if (go->neg_upap && !have_pap_secret()) + go->neg_upap = 0; + if (go->neg_chap) { + remote = ipwo->accept_remote? 0: ipwo->hisaddr; + if (!have_chap_secret(ppp_settings.remote_name, ppp_settings.our_name, remote)) + go->neg_chap = 0; + } +} + + +#if PAP_SUPPORT > 0 +/* + * check_passwd - Check the user name and passwd against the PAP secrets + * file. If requested, also check against the system password database, + * and login the user if OK. + * + * returns: + * UPAP_AUTHNAK: Authentication failed. + * UPAP_AUTHACK: Authentication succeeded. + * In either case, msg points to an appropriate message. + */ +int check_passwd( + int unit, + char *auser, + int userlen, + char *apasswd, + int passwdlen, + char **msg, + int *msglen +) +{ +#if 1 + *msg = (char *) 0; + return UPAP_AUTHACK; /* XXX Assume all entries OK. */ +#else + int ret = 0; + struct wordlist *addrs = NULL; + char passwd[256], user[256]; + char secret[MAXWORDLEN]; + static u_short attempts = 0; + + /* + * Make copies of apasswd and auser, then null-terminate them. + */ + BCOPY(apasswd, passwd, passwdlen); + passwd[passwdlen] = '\0'; + BCOPY(auser, user, userlen); + user[userlen] = '\0'; + *msg = (char *) 0; + + /* XXX Validate user name and password. */ + ret = UPAP_AUTHACK; /* XXX Assume all entries OK. */ + + if (ret == UPAP_AUTHNAK) { + if (*msg == (char *) 0) + *msg = "Login incorrect"; + *msglen = strlen(*msg); + /* + * Frustrate passwd stealer programs. + * Allow 10 tries, but start backing off after 3 (stolen from login). + * On 10'th, drop the connection. + */ + if (attempts++ >= 10) { + AUTHDEBUG((LOG_WARNING, "%d LOGIN FAILURES BY %s\n", attempts, user)); + /*ppp_panic("Excess Bad Logins");*/ + } + if (attempts > 3) { + sys_msleep((attempts - 3) * 5); + } + if (addrs != NULL) { + free_wordlist(addrs); + } + } else { + attempts = 0; /* Reset count */ + if (*msg == (char *) 0) + *msg = "Login ok"; + *msglen = strlen(*msg); + set_allowed_addrs(unit, addrs); + } + + BZERO(passwd, sizeof(passwd)); + BZERO(secret, sizeof(secret)); + + return ret; +#endif +} +#endif + + +/* + * auth_ip_addr - check whether the peer is authorized to use + * a given IP address. Returns 1 if authorized, 0 otherwise. + */ +int auth_ip_addr(int unit, u32_t addr) +{ + return ip_addr_check(addr, addresses[unit]); +} + +/* + * bad_ip_adrs - return 1 if the IP address is one we don't want + * to use, such as an address in the loopback net or a multicast address. + * addr is in network byte order. + */ +int bad_ip_adrs(u32_t addr) +{ + addr = ntohl(addr); + return (addr >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET + || IN_MULTICAST(addr) || IN_BADCLASS(addr); +} + + +#if CHAP_SUPPORT > 0 +/* + * get_secret - open the CHAP secret file and return the secret + * for authenticating the given client on the given server. + * (We could be either client or server). + */ +int get_secret( + int unit, + char *client, + char *server, + char *secret, + int *secret_len, + int save_addrs +) +{ +#if 1 + int len; + struct wordlist *addrs; + + addrs = NULL; + + if(!client || !client[0] || strcmp(client, ppp_settings.user)) { + return 0; + } + + len = strlen(ppp_settings.passwd); + if (len > MAXSECRETLEN) { + AUTHDEBUG((LOG_ERR, "Secret for %s on %s is too long\n", client, server)); + len = MAXSECRETLEN; + } + BCOPY(ppp_settings.passwd, secret, len); + *secret_len = len; + + return 1; +#else + int ret = 0, len; + struct wordlist *addrs; + char secbuf[MAXWORDLEN]; + + addrs = NULL; + secbuf[0] = 0; + + /* XXX Find secret. */ + if (ret < 0) + return 0; + + if (save_addrs) + set_allowed_addrs(unit, addrs); + + len = strlen(secbuf); + if (len > MAXSECRETLEN) { + AUTHDEBUG((LOG_ERR, "Secret for %s on %s is too long\n", client, server)); + len = MAXSECRETLEN; + } + BCOPY(secbuf, secret, len); + BZERO(secbuf, sizeof(secbuf)); + *secret_len = len; + + return 1; +#endif +} +#endif + + +#if 0 /* UNUSED */ +/* + * auth_check_options - called to check authentication options. + */ +void auth_check_options(void) +{ + lcp_options *wo = &lcp_wantoptions[0]; + int can_auth; + ipcp_options *ipwo = &ipcp_wantoptions[0]; + u32_t remote; + + /* Default our_name to hostname, and user to our_name */ + if (ppp_settings.our_name[0] == 0 || ppp_settings.usehostname) + strcpy(ppp_settings.our_name, ppp_settings.hostname); + if (ppp_settings.user[0] == 0) + strcpy(ppp_settings.user, ppp_settings.our_name); + + /* If authentication is required, ask peer for CHAP or PAP. */ + if (ppp_settings.auth_required && !wo->neg_chap && !wo->neg_upap) { + wo->neg_chap = 1; + wo->neg_upap = 1; + } + + /* + * Check whether we have appropriate secrets to use + * to authenticate the peer. + */ + can_auth = wo->neg_upap && have_pap_secret(); + if (!can_auth && wo->neg_chap) { + remote = ipwo->accept_remote? 0: ipwo->hisaddr; + can_auth = have_chap_secret(ppp_settings.remote_name, ppp_settings.our_name, remote); + } + + if (ppp_settings.auth_required && !can_auth) { + ppp_panic("No auth secret"); + } +} +#endif + + +/**********************************/ +/*** LOCAL FUNCTION DEFINITIONS ***/ +/**********************************/ +/* + * Proceed to the network phase. + */ +static void network_phase(int unit) +{ + int i; + struct protent *protp; + lcp_options *go = &lcp_gotoptions[unit]; + + /* + * If the peer had to authenticate, run the auth-up script now. + */ + if ((go->neg_chap || go->neg_upap) && !did_authup) { + /* XXX Do setup for peer authentication. */ + did_authup = 1; + } + +#if CBCP_SUPPORT > 0 + /* + * If we negotiated callback, do it now. + */ + if (go->neg_cbcp) { + lcp_phase[unit] = PHASE_CALLBACK; + (*cbcp_protent.open)(unit); + return; + } +#endif + + lcp_phase[unit] = PHASE_NETWORK; + for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) + if (protp->protocol < 0xC000 && protp->enabled_flag + && protp->open != NULL) { + (*protp->open)(unit); + if (protp->protocol != PPP_CCP) + ++num_np_open; + } + + if (num_np_open == 0) + /* nothing to do */ + lcp_close(0, "No network protocols running"); +} + +/* + * check_idle - check whether the link has been idle for long + * enough that we can shut it down. + */ +static void check_idle(void *arg) +{ + struct ppp_idle idle; + u_short itime; + + (void)arg; + if (!get_idle_time(0, &idle)) + return; + itime = LWIP_MIN(idle.xmit_idle, idle.recv_idle); + if (itime >= ppp_settings.idle_time_limit) { + /* link is idle: shut it down. */ + AUTHDEBUG((LOG_INFO, "Terminating connection due to lack of activity.\n")); + lcp_close(0, "Link inactive"); + } else { + TIMEOUT(check_idle, NULL, ppp_settings.idle_time_limit - itime); + } +} + +/* + * connect_time_expired - log a message and close the connection. + */ +static void connect_time_expired(void *arg) +{ + (void)arg; + + AUTHDEBUG((LOG_INFO, "Connect time expired\n")); + lcp_close(0, "Connect time expired"); /* Close connection */ +} + +#if 0 +/* + * login - Check the user name and password against the system + * password database, and login the user if OK. + * + * returns: + * UPAP_AUTHNAK: Login failed. + * UPAP_AUTHACK: Login succeeded. + * In either case, msg points to an appropriate message. + */ +static int login(char *user, char *passwd, char **msg, int *msglen) +{ + /* XXX Fail until we decide that we want to support logins. */ + return (UPAP_AUTHNAK); +} +#endif + +/* + * logout - Logout the user. + */ +static void logout(void) +{ + logged_in = 0; +} + + +/* + * null_login - Check if a username of "" and a password of "" are + * acceptable, and iff so, set the list of acceptable IP addresses + * and return 1. + */ +static int null_login(int unit) +{ + (void)unit; + /* XXX Fail until we decide that we want to support logins. */ + return 0; +} + + +/* + * get_pap_passwd - get a password for authenticating ourselves with + * our peer using PAP. Returns 1 on success, 0 if no suitable password + * could be found. + */ +static int get_pap_passwd(int unit, char *user, char *passwd) +{ +/* normally we would reject PAP if no password is provided, + but this causes problems with some providers (like CHT in Taiwan) + who incorrectly request PAP and expect a bogus/empty password, so + always provide a default user/passwd of "none"/"none" +*/ + if(user) + strcpy(user, "none"); + if(passwd) + strcpy(passwd, "none"); + + return 1; +} + + +/* + * have_pap_secret - check whether we have a PAP file with any + * secrets that we could possibly use for authenticating the peer. + */ +static int have_pap_secret(void) +{ + /* XXX Fail until we set up our passwords. */ + return 0; +} + + +/* + * have_chap_secret - check whether we have a CHAP file with a + * secret that we could possibly use for authenticating `client' + * on `server'. Either can be the null string, meaning we don't + * know the identity yet. + */ +static int have_chap_secret(char *client, char *server, u32_t remote) +{ + (void)client; + (void)server; + (void)remote; + /* XXX Fail until we set up our passwords. */ + return 0; +} + + +#if 0 /* PAP_SUPPORT > 0 || CHAP_SUPPORT > 0 */ +/* + * set_allowed_addrs() - set the list of allowed addresses. + */ +static void set_allowed_addrs(int unit, struct wordlist *addrs) +{ + if (addresses[unit] != NULL) + free_wordlist(addresses[unit]); + addresses[unit] = addrs; + +#if 0 + /* + * If there's only one authorized address we might as well + * ask our peer for that one right away + */ + if (addrs != NULL && addrs->next == NULL) { + char *p = addrs->word; + struct ipcp_options *wo = &ipcp_wantoptions[unit]; + u32_t a; + struct hostent *hp; + + if (wo->hisaddr == 0 && *p != '!' && *p != '-' + && strchr(p, '/') == NULL) { + hp = gethostbyname(p); + if (hp != NULL && hp->h_addrtype == AF_INET) + a = *(u32_t *)hp->h_addr; + else + a = inet_addr(p); + if (a != (u32_t) -1) + wo->hisaddr = a; + } + } +#endif +} +#endif + +static int ip_addr_check(u32_t addr, struct wordlist *addrs) +{ + + /* don't allow loopback or multicast address */ + if (bad_ip_adrs(addr)) + return 0; + + if (addrs == NULL) + return !ppp_settings.auth_required; /* no addresses authorized */ + + /* XXX All other addresses allowed. */ + return 1; +} + +#if 0 /* PAP_SUPPORT > 0 || CHAP_SUPPORT */ +/* + * free_wordlist - release memory allocated for a wordlist. + */ +static void free_wordlist(struct wordlist *wp) +{ + struct wordlist *next; + + while (wp != NULL) { + next = wp->next; + free(wp); + wp = next; + } +} +#endif + +#endif /* PPP_SUPPORT */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/auth.h @@ -0,0 +1,94 @@ +/***************************************************************************** +* auth.h - PPP Authentication and phase control header file. +* +* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. +* portions Copyright (c) 1998 Global Election Systems Inc. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY +* +* 03-01-01 Marc Boucher <marc@mbsi.ca> +* Ported to lwIP. +* 97-12-04 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc. +* Original derived from BSD pppd.h. +*****************************************************************************/ +/* + * pppd.h - PPP daemon global declarations. + * + * Copyright (c) 1989 Carnegie Mellon University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Carnegie Mellon University. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + */ + +#ifndef AUTH_H +#define AUTH_H + +/*********************** +*** PUBLIC FUNCTIONS *** +***********************/ +void link_required (int); /* we are starting to use the link */ +void link_terminated (int); /* we are finished with the link */ +void link_down (int); /* the LCP layer has left the Opened state */ +void link_established (int); /* the link is up; authenticate now */ +void np_up (int, u16_t); /* a network protocol has come up */ +void np_down (int, u16_t); /* a network protocol has gone down */ +void np_finished (int, u16_t); /* a network protocol no longer needs link */ +void auth_peer_fail (int, u16_t);/* peer failed to authenticate itself */ + +/* peer successfully authenticated itself */ +void auth_peer_success (int, u16_t, char *, int); + +/* we failed to authenticate ourselves */ +void auth_withpeer_fail (int, u16_t); + +/* we successfully authenticated ourselves */ +void auth_withpeer_success (int, u16_t); + +/* check authentication options supplied */ +void auth_check_options (void); +void auth_reset (int); /* check what secrets we have */ + +/* Check peer-supplied username/password */ +int check_passwd (int, char *, int, char *, int, char **, int *); + +/* get "secret" for chap */ +int get_secret (int, char *, char *, char *, int *, int); + +/* check if IP address is authorized */ +int auth_ip_addr (int, u32_t); + +/* check if IP address is unreasonable */ +int bad_ip_adrs (u32_t); + + +#endif /* AUTH_H */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/chap.c @@ -0,0 +1,872 @@ +/*** WARNING - THIS HAS NEVER BEEN FINISHED ***/ +/***************************************************************************** +* chap.c - Network Challenge Handshake Authentication Protocol program file. +* +* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. +* portions Copyright (c) 1997 by Global Election Systems Inc. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY +* +* 03-01-01 Marc Boucher <marc@mbsi.ca> +* Ported to lwIP. +* 97-12-04 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc. +* Original based on BSD chap.c. +*****************************************************************************/ +/* + * chap.c - Challenge Handshake Authentication Protocol. + * + * Copyright (c) 1993 The Australian National University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by the Australian National University. The name of the University + * may not be used to endorse or promote products derived from this + * software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * Copyright (c) 1991 Gregory M. Christy. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Gregory M. Christy. The name of the author may not be used to + * endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +#include "ppp.h" +#if PPP_SUPPORT > 0 +#include "magic.h" + +#if CHAP_SUPPORT > 0 + +#include "randm.h" +#include "auth.h" +#include "md5.h" +#include "chap.h" +#include "chpms.h" +#include "pppdebug.h" + + +/*************************/ +/*** LOCAL DEFINITIONS ***/ +/*************************/ + + +/************************/ +/*** LOCAL DATA TYPES ***/ +/************************/ + + +/***********************************/ +/*** LOCAL FUNCTION DECLARATIONS ***/ +/***********************************/ +/* + * Protocol entry points. + */ +static void ChapInit (int); +static void ChapLowerUp (int); +static void ChapLowerDown (int); +static void ChapInput (int, u_char *, int); +static void ChapProtocolReject (int); +static int ChapPrintPkt (u_char *, int, + void (*) (void *, char *, ...), void *); + +static void ChapChallengeTimeout (void *); +static void ChapResponseTimeout (void *); +static void ChapReceiveChallenge (chap_state *, u_char *, int, int); +static void ChapRechallenge (void *); +static void ChapReceiveResponse (chap_state *, u_char *, int, int); +static void ChapReceiveSuccess(chap_state *cstate, u_char *inp, u_char id, int len); +static void ChapReceiveFailure(chap_state *cstate, u_char *inp, u_char id, int len); +static void ChapSendStatus (chap_state *, int); +static void ChapSendChallenge (chap_state *); +static void ChapSendResponse (chap_state *); +static void ChapGenChallenge (chap_state *); + + +/******************************/ +/*** PUBLIC DATA STRUCTURES ***/ +/******************************/ +chap_state chap[NUM_PPP]; /* CHAP state; one for each unit */ + +struct protent chap_protent = { + PPP_CHAP, + ChapInit, + ChapInput, + ChapProtocolReject, + ChapLowerUp, + ChapLowerDown, + NULL, + NULL, +#if 0 + ChapPrintPkt, + NULL, +#endif + 1, + "CHAP", +#if 0 + NULL, + NULL, + NULL +#endif +}; + + + +/*****************************/ +/*** LOCAL DATA STRUCTURES ***/ +/*****************************/ +static char *ChapCodenames[] = { + "Challenge", "Response", "Success", "Failure" +}; + + + +/***********************************/ +/*** PUBLIC FUNCTION DEFINITIONS ***/ +/***********************************/ +/* + * ChapAuthWithPeer - Authenticate us with our peer (start client). + * + */ +void ChapAuthWithPeer(int unit, char *our_name, int digest) +{ + chap_state *cstate = &chap[unit]; + + cstate->resp_name = our_name; + cstate->resp_type = digest; + + if (cstate->clientstate == CHAPCS_INITIAL || + cstate->clientstate == CHAPCS_PENDING) { + /* lower layer isn't up - wait until later */ + cstate->clientstate = CHAPCS_PENDING; + return; + } + + /* + * We get here as a result of LCP coming up. + * So even if CHAP was open before, we will + * have to re-authenticate ourselves. + */ + cstate->clientstate = CHAPCS_LISTEN; +} + + +/* + * ChapAuthPeer - Authenticate our peer (start server). + */ +void ChapAuthPeer(int unit, char *our_name, int digest) +{ + chap_state *cstate = &chap[unit]; + + cstate->chal_name = our_name; + cstate->chal_type = digest; + + if (cstate->serverstate == CHAPSS_INITIAL || + cstate->serverstate == CHAPSS_PENDING) { + /* lower layer isn't up - wait until later */ + cstate->serverstate = CHAPSS_PENDING; + return; + } + + ChapGenChallenge(cstate); + ChapSendChallenge(cstate); /* crank it up dude! */ + cstate->serverstate = CHAPSS_INITIAL_CHAL; +} + + + + +/**********************************/ +/*** LOCAL FUNCTION DEFINITIONS ***/ +/**********************************/ +/* + * ChapInit - Initialize a CHAP unit. + */ +static void ChapInit(int unit) +{ + chap_state *cstate = &chap[unit]; + + BZERO(cstate, sizeof(*cstate)); + cstate->unit = unit; + cstate->clientstate = CHAPCS_INITIAL; + cstate->serverstate = CHAPSS_INITIAL; + cstate->timeouttime = CHAP_DEFTIMEOUT; + cstate->max_transmits = CHAP_DEFTRANSMITS; + /* random number generator is initialized in magic_init */ +} + + +/* + * ChapChallengeTimeout - Timeout expired on sending challenge. + */ +static void ChapChallengeTimeout(void *arg) +{ + chap_state *cstate = (chap_state *) arg; + + /* if we aren't sending challenges, don't worry. then again we */ + /* probably shouldn't be here either */ + if (cstate->serverstate != CHAPSS_INITIAL_CHAL && + cstate->serverstate != CHAPSS_RECHALLENGE) + return; + + if (cstate->chal_transmits >= cstate->max_transmits) { + /* give up on peer */ + CHAPDEBUG((LOG_ERR, "Peer failed to respond to CHAP challenge\n")); + cstate->serverstate = CHAPSS_BADAUTH; + auth_peer_fail(cstate->unit, PPP_CHAP); + return; + } + + ChapSendChallenge(cstate); /* Re-send challenge */ +} + + +/* + * ChapResponseTimeout - Timeout expired on sending response. + */ +static void ChapResponseTimeout(void *arg) +{ + chap_state *cstate = (chap_state *) arg; + + /* if we aren't sending a response, don't worry. */ + if (cstate->clientstate != CHAPCS_RESPONSE) + return; + + ChapSendResponse(cstate); /* re-send response */ +} + + +/* + * ChapRechallenge - Time to challenge the peer again. + */ +static void ChapRechallenge(void *arg) +{ + chap_state *cstate = (chap_state *) arg; + + /* if we aren't sending a response, don't worry. */ + if (cstate->serverstate != CHAPSS_OPEN) + return; + + ChapGenChallenge(cstate); + ChapSendChallenge(cstate); + cstate->serverstate = CHAPSS_RECHALLENGE; +} + + +/* + * ChapLowerUp - The lower layer is up. + * + * Start up if we have pending requests. + */ +static void ChapLowerUp(int unit) +{ + chap_state *cstate = &chap[unit]; + + if (cstate->clientstate == CHAPCS_INITIAL) + cstate->clientstate = CHAPCS_CLOSED; + else if (cstate->clientstate == CHAPCS_PENDING) + cstate->clientstate = CHAPCS_LISTEN; + + if (cstate->serverstate == CHAPSS_INITIAL) + cstate->serverstate = CHAPSS_CLOSED; + else if (cstate->serverstate == CHAPSS_PENDING) { + ChapGenChallenge(cstate); + ChapSendChallenge(cstate); + cstate->serverstate = CHAPSS_INITIAL_CHAL; + } +} + + +/* + * ChapLowerDown - The lower layer is down. + * + * Cancel all timeouts. + */ +static void ChapLowerDown(int unit) +{ + chap_state *cstate = &chap[unit]; + + /* Timeout(s) pending? Cancel if so. */ + if (cstate->serverstate == CHAPSS_INITIAL_CHAL || + cstate->serverstate == CHAPSS_RECHALLENGE) + UNTIMEOUT(ChapChallengeTimeout, cstate); + else if (cstate->serverstate == CHAPSS_OPEN + && cstate->chal_interval != 0) + UNTIMEOUT(ChapRechallenge, cstate); + if (cstate->clientstate == CHAPCS_RESPONSE) + UNTIMEOUT(ChapResponseTimeout, cstate); + + cstate->clientstate = CHAPCS_INITIAL; + cstate->serverstate = CHAPSS_INITIAL; +} + + +/* + * ChapProtocolReject - Peer doesn't grok CHAP. + */ +static void ChapProtocolReject(int unit) +{ + chap_state *cstate = &chap[unit]; + + if (cstate->serverstate != CHAPSS_INITIAL && + cstate->serverstate != CHAPSS_CLOSED) + auth_peer_fail(unit, PPP_CHAP); + if (cstate->clientstate != CHAPCS_INITIAL && + cstate->clientstate != CHAPCS_CLOSED) + auth_withpeer_fail(unit, PPP_CHAP); + ChapLowerDown(unit); /* shutdown chap */ +} + + +/* + * ChapInput - Input CHAP packet. + */ +static void ChapInput(int unit, u_char *inpacket, int packet_len) +{ + chap_state *cstate = &chap[unit]; + u_char *inp; + u_char code, id; + int len; + + /* + * Parse header (code, id and length). + * If packet too short, drop it. + */ + inp = inpacket; + if (packet_len < CHAP_HEADERLEN) { + CHAPDEBUG((LOG_INFO, "ChapInput: rcvd short header.\n")); + return; + } + GETCHAR(code, inp); + GETCHAR(id, inp); + GETSHORT(len, inp); + if (len < CHAP_HEADERLEN) { + CHAPDEBUG((LOG_INFO, "ChapInput: rcvd illegal length.\n")); + return; + } + if (len > packet_len) { + CHAPDEBUG((LOG_INFO, "ChapInput: rcvd short packet.\n")); + return; + } + len -= CHAP_HEADERLEN; + + /* + * Action depends on code (as in fact it usually does :-). + */ + switch (code) { + case CHAP_CHALLENGE: + ChapReceiveChallenge(cstate, inp, id, len); + break; + + case CHAP_RESPONSE: + ChapReceiveResponse(cstate, inp, id, len); + break; + + case CHAP_FAILURE: + ChapReceiveFailure(cstate, inp, id, len); + break; + + case CHAP_SUCCESS: + ChapReceiveSuccess(cstate, inp, id, len); + break; + + default: /* Need code reject? */ + CHAPDEBUG((LOG_WARNING, "Unknown CHAP code (%d) received.\n", code)); + break; + } +} + + +/* + * ChapReceiveChallenge - Receive Challenge and send Response. + */ +static void ChapReceiveChallenge(chap_state *cstate, u_char *inp, int id, int len) +{ + int rchallenge_len; + u_char *rchallenge; + int secret_len; + char secret[MAXSECRETLEN]; + char rhostname[256]; + MD5_CTX mdContext; + u_char hash[MD5_SIGNATURE_SIZE]; + + CHAPDEBUG((LOG_INFO, "ChapReceiveChallenge: Rcvd id %d.\n", id)); + if (cstate->clientstate == CHAPCS_CLOSED || + cstate->clientstate == CHAPCS_PENDING) { + CHAPDEBUG((LOG_INFO, "ChapReceiveChallenge: in state %d\n", + cstate->clientstate)); + return; + } + + if (len < 2) { + CHAPDEBUG((LOG_INFO, "ChapReceiveChallenge: rcvd short packet.\n")); + return; + } + + GETCHAR(rchallenge_len, inp); + len -= sizeof (u_char) + rchallenge_len; /* now name field length */ + if (len < 0) { + CHAPDEBUG((LOG_INFO, "ChapReceiveChallenge: rcvd short packet.\n")); + return; + } + rchallenge = inp; + INCPTR(rchallenge_len, inp); + + if (len >= sizeof(rhostname)) + len = sizeof(rhostname) - 1; + BCOPY(inp, rhostname, len); + rhostname[len] = '\000'; + + CHAPDEBUG((LOG_INFO, "ChapReceiveChallenge: received name field '%s'\n", + rhostname)); + + /* Microsoft doesn't send their name back in the PPP packet */ + if (ppp_settings.remote_name[0] != 0 && (ppp_settings.explicit_remote || rhostname[0] == 0)) { + strncpy(rhostname, ppp_settings.remote_name, sizeof(rhostname)); + rhostname[sizeof(rhostname) - 1] = 0; + CHAPDEBUG((LOG_INFO, "ChapReceiveChallenge: using '%s' as remote name\n", + rhostname)); + } + + /* get secret for authenticating ourselves with the specified host */ + if (!get_secret(cstate->unit, cstate->resp_name, rhostname, + secret, &secret_len, 0)) { + secret_len = 0; /* assume null secret if can't find one */ + CHAPDEBUG((LOG_WARNING, "No CHAP secret found for authenticating us to %s\n", rhostname)); + } + + /* cancel response send timeout if necessary */ + if (cstate->clientstate == CHAPCS_RESPONSE) + UNTIMEOUT(ChapResponseTimeout, cstate); + + cstate->resp_id = id; + cstate->resp_transmits = 0; + + /* generate MD based on negotiated type */ + switch (cstate->resp_type) { + + case CHAP_DIGEST_MD5: + MD5Init(&mdContext); + MD5Update(&mdContext, &cstate->resp_id, 1); + MD5Update(&mdContext, (u_char*)secret, secret_len); + MD5Update(&mdContext, rchallenge, rchallenge_len); + MD5Final(hash, &mdContext); + BCOPY(hash, cstate->response, MD5_SIGNATURE_SIZE); + cstate->resp_length = MD5_SIGNATURE_SIZE; + break; + +#ifdef CHAPMS + case CHAP_MICROSOFT: + ChapMS(cstate, rchallenge, rchallenge_len, secret, secret_len); + break; +#endif + + default: + CHAPDEBUG((LOG_INFO, "unknown digest type %d\n", cstate->resp_type)); + return; + } + + BZERO(secret, sizeof(secret)); + ChapSendResponse(cstate); +} + + +/* + * ChapReceiveResponse - Receive and process response. + */ +static void ChapReceiveResponse(chap_state *cstate, u_char *inp, int id, int len) +{ + u_char *remmd, remmd_len; + int secret_len, old_state; + int code; + char rhostname[256]; + MD5_CTX mdContext; + char secret[MAXSECRETLEN]; + u_char hash[MD5_SIGNATURE_SIZE]; + + CHAPDEBUG((LOG_INFO, "ChapReceiveResponse: Rcvd id %d.\n", id)); + + if (cstate->serverstate == CHAPSS_CLOSED || + cstate->serverstate == CHAPSS_PENDING) { + CHAPDEBUG((LOG_INFO, "ChapReceiveResponse: in state %d\n", + cstate->serverstate)); + return; + } + + if (id != cstate->chal_id) + return; /* doesn't match ID of last challenge */ + + /* + * If we have received a duplicate or bogus Response, + * we have to send the same answer (Success/Failure) + * as we did for the first Response we saw. + */ + if (cstate->serverstate == CHAPSS_OPEN) { + ChapSendStatus(cstate, CHAP_SUCCESS); + return; + } + if (cstate->serverstate == CHAPSS_BADAUTH) { + ChapSendStatus(cstate, CHAP_FAILURE); + return; + } + + if (len < 2) { + CHAPDEBUG((LOG_INFO, "ChapReceiveResponse: rcvd short packet.\n")); + return; + } + GETCHAR(remmd_len, inp); /* get length of MD */ + remmd = inp; /* get pointer to MD */ + INCPTR(remmd_len, inp); + + len -= sizeof (u_char) + remmd_len; + if (len < 0) { + CHAPDEBUG((LOG_INFO, "ChapReceiveResponse: rcvd short packet.\n")); + return; + } + + UNTIMEOUT(ChapChallengeTimeout, cstate); + + if (len >= sizeof(rhostname)) + len = sizeof(rhostname) - 1; + BCOPY(inp, rhostname, len); + rhostname[len] = '\000'; + + CHAPDEBUG((LOG_INFO, "ChapReceiveResponse: received name field: %s\n", + rhostname)); + + /* + * Get secret for authenticating them with us, + * do the hash ourselves, and compare the result. + */ + code = CHAP_FAILURE; + if (!get_secret(cstate->unit, rhostname, cstate->chal_name, + secret, &secret_len, 1)) { +/* CHAPDEBUG((LOG_WARNING, TL_CHAP, "No CHAP secret found for authenticating %s\n", rhostname)); */ + CHAPDEBUG((LOG_WARNING, "No CHAP secret found for authenticating %s\n", + rhostname)); + } else { + + /* generate MD based on negotiated type */ + switch (cstate->chal_type) { + + case CHAP_DIGEST_MD5: /* only MD5 is defined for now */ + if (remmd_len != MD5_SIGNATURE_SIZE) + break; /* it's not even the right length */ + MD5Init(&mdContext); + MD5Update(&mdContext, &cstate->chal_id, 1); + MD5Update(&mdContext, (u_char*)secret, secret_len); + MD5Update(&mdContext, cstate->challenge, cstate->chal_len); + MD5Final(hash, &mdContext); + + /* compare local and remote MDs and send the appropriate status */ + if (memcmp (hash, remmd, MD5_SIGNATURE_SIZE) == 0) + code = CHAP_SUCCESS; /* they are the same! */ + break; + + default: + CHAPDEBUG((LOG_INFO, "unknown digest type %d\n", cstate->chal_type)); + } + } + + BZERO(secret, sizeof(secret)); + ChapSendStatus(cstate, code); + + if (code == CHAP_SUCCESS) { + old_state = cstate->serverstate; + cstate->serverstate = CHAPSS_OPEN; + if (old_state == CHAPSS_INITIAL_CHAL) { + auth_peer_success(cstate->unit, PPP_CHAP, rhostname, len); + } + if (cstate->chal_interval != 0) + TIMEOUT(ChapRechallenge, cstate, cstate->chal_interval); + } else { + CHAPDEBUG((LOG_ERR, "CHAP peer authentication failed\n")); + cstate->serverstate = CHAPSS_BADAUTH; + auth_peer_fail(cstate->unit, PPP_CHAP); + } +} + +/* + * ChapReceiveSuccess - Receive Success + */ +static void ChapReceiveSuccess(chap_state *cstate, u_char *inp, u_char id, int len) +{ + + CHAPDEBUG((LOG_INFO, "ChapReceiveSuccess: Rcvd id %d.\n", id)); + + if (cstate->clientstate == CHAPCS_OPEN) + /* presumably an answer to a duplicate response */ + return; + + if (cstate->clientstate != CHAPCS_RESPONSE) { + /* don't know what this is */ + CHAPDEBUG((LOG_INFO, "ChapReceiveSuccess: in state %d\n", + cstate->clientstate)); + return; + } + + UNTIMEOUT(ChapResponseTimeout, cstate); + + /* + * Print message. + */ + if (len > 0) + PRINTMSG(inp, len); + + cstate->clientstate = CHAPCS_OPEN; + + auth_withpeer_success(cstate->unit, PPP_CHAP); +} + + +/* + * ChapReceiveFailure - Receive failure. + */ +static void ChapReceiveFailure(chap_state *cstate, u_char *inp, u_char id, int len) +{ + CHAPDEBUG((LOG_INFO, "ChapReceiveFailure: Rcvd id %d.\n", id)); + + if (cstate->clientstate != CHAPCS_RESPONSE) { + /* don't know what this is */ + CHAPDEBUG((LOG_INFO, "ChapReceiveFailure: in state %d\n", + cstate->clientstate)); + return; + } + + UNTIMEOUT(ChapResponseTimeout, cstate); + + /* + * Print message. + */ + if (len > 0) + PRINTMSG(inp, len); + + CHAPDEBUG((LOG_ERR, "CHAP authentication failed\n")); + auth_withpeer_fail(cstate->unit, PPP_CHAP); +} + + +/* + * ChapSendChallenge - Send an Authenticate challenge. + */ +static void ChapSendChallenge(chap_state *cstate) +{ + u_char *outp; + int chal_len, name_len; + int outlen; + + chal_len = cstate->chal_len; + name_len = strlen(cstate->chal_name); + outlen = CHAP_HEADERLEN + sizeof (u_char) + chal_len + name_len; + outp = outpacket_buf[cstate->unit]; + + MAKEHEADER(outp, PPP_CHAP); /* paste in a CHAP header */ + + PUTCHAR(CHAP_CHALLENGE, outp); + PUTCHAR(cstate->chal_id, outp); + PUTSHORT(outlen, outp); + + PUTCHAR(chal_len, outp); /* put length of challenge */ + BCOPY(cstate->challenge, outp, chal_len); + INCPTR(chal_len, outp); + + BCOPY(cstate->chal_name, outp, name_len); /* append hostname */ + + pppWrite(cstate->unit, outpacket_buf[cstate->unit], outlen + PPP_HDRLEN); + + CHAPDEBUG((LOG_INFO, "ChapSendChallenge: Sent id %d.\n", cstate->chal_id)); + + TIMEOUT(ChapChallengeTimeout, cstate, cstate->timeouttime); + ++cstate->chal_transmits; +} + + +/* + * ChapSendStatus - Send a status response (ack or nak). + */ +static void ChapSendStatus(chap_state *cstate, int code) +{ + u_char *outp; + int outlen, msglen; + char msg[256]; + + if (code == CHAP_SUCCESS) + strcpy(msg, "Welcome!"); + else + strcpy(msg, "I don't like you. Go 'way."); + msglen = strlen(msg); + + outlen = CHAP_HEADERLEN + msglen; + outp = outpacket_buf[cstate->unit]; + + MAKEHEADER(outp, PPP_CHAP); /* paste in a header */ + + PUTCHAR(code, outp); + PUTCHAR(cstate->chal_id, outp); + PUTSHORT(outlen, outp); + BCOPY(msg, outp, msglen); + pppWrite(cstate->unit, outpacket_buf[cstate->unit], outlen + PPP_HDRLEN); + + CHAPDEBUG((LOG_INFO, "ChapSendStatus: Sent code %d, id %d.\n", code, + cstate->chal_id)); +} + +/* + * ChapGenChallenge is used to generate a pseudo-random challenge string of + * a pseudo-random length between min_len and max_len. The challenge + * string and its length are stored in *cstate, and various other fields of + * *cstate are initialized. + */ + +static void ChapGenChallenge(chap_state *cstate) +{ + int chal_len; + u_char *ptr = cstate->challenge; + int i; + + /* pick a random challenge length between MIN_CHALLENGE_LENGTH and + MAX_CHALLENGE_LENGTH */ + chal_len = (unsigned) + ((((magic() >> 16) * + (MAX_CHALLENGE_LENGTH - MIN_CHALLENGE_LENGTH)) >> 16) + + MIN_CHALLENGE_LENGTH); + cstate->chal_len = chal_len; + cstate->chal_id = ++cstate->id; + cstate->chal_transmits = 0; + + /* generate a random string */ + for (i = 0; i < chal_len; i++ ) + *ptr++ = (char) (magic() & 0xff); +} + +/* + * ChapSendResponse - send a response packet with values as specified + * in *cstate. + */ +/* ARGSUSED */ +static void ChapSendResponse(chap_state *cstate) +{ + u_char *outp; + int outlen, md_len, name_len; + + md_len = cstate->resp_length; + name_len = strlen(cstate->resp_name); + outlen = CHAP_HEADERLEN + sizeof (u_char) + md_len + name_len; + outp = outpacket_buf[cstate->unit]; + + MAKEHEADER(outp, PPP_CHAP); + + PUTCHAR(CHAP_RESPONSE, outp); /* we are a response */ + PUTCHAR(cstate->resp_id, outp); /* copy id from challenge packet */ + PUTSHORT(outlen, outp); /* packet length */ + + PUTCHAR(md_len, outp); /* length of MD */ + BCOPY(cstate->response, outp, md_len); /* copy MD to buffer */ + INCPTR(md_len, outp); + + BCOPY(cstate->resp_name, outp, name_len); /* append our name */ + + /* send the packet */ + pppWrite(cstate->unit, outpacket_buf[cstate->unit], outlen + PPP_HDRLEN); + + cstate->clientstate = CHAPCS_RESPONSE; + TIMEOUT(ChapResponseTimeout, cstate, cstate->timeouttime); + ++cstate->resp_transmits; +} + +/* + * ChapPrintPkt - print the contents of a CHAP packet. + */ +static int ChapPrintPkt( + u_char *p, + int plen, + void (*printer) (void *, char *, ...), + void *arg +) +{ + int code, id, len; + int clen, nlen; + u_char x; + + if (plen < CHAP_HEADERLEN) + return 0; + GETCHAR(code, p); + GETCHAR(id, p); + GETSHORT(len, p); + if (len < CHAP_HEADERLEN || len > plen) + return 0; + + if (code >= 1 && code <= sizeof(ChapCodenames) / sizeof(char *)) + printer(arg, " %s", ChapCodenames[code-1]); + else + printer(arg, " code=0x%x", code); + printer(arg, " id=0x%x", id); + len -= CHAP_HEADERLEN; + switch (code) { + case CHAP_CHALLENGE: + case CHAP_RESPONSE: + if (len < 1) + break; + clen = p[0]; + if (len < clen + 1) + break; + ++p; + nlen = len - clen - 1; + printer(arg, " <"); + for (; clen > 0; --clen) { + GETCHAR(x, p); + printer(arg, "%.2x", x); + } + printer(arg, ">, name = %.*Z", nlen, p); + break; + case CHAP_FAILURE: + case CHAP_SUCCESS: + printer(arg, " %.*Z", len, p); + break; + default: + for (clen = len; clen > 0; --clen) { + GETCHAR(x, p); + printer(arg, " %.2x", x); + } + } + + return len + CHAP_HEADERLEN; +} + +#endif + +#endif /* PPP_SUPPORT */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/chap.h @@ -0,0 +1,167 @@ +/***************************************************************************** +* chap.h - Network Challenge Handshake Authentication Protocol header file. +* +* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. +* portions Copyright (c) 1998 Global Election Systems Inc. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY +* +* 03-01-01 Marc Boucher <marc@mbsi.ca> +* Ported to lwIP. +* 97-12-03 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc. +* Original built from BSD network code. +******************************************************************************/ +/* + * chap.h - Challenge Handshake Authentication Protocol definitions. + * + * Copyright (c) 1993 The Australian National University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by the Australian National University. The name of the University + * may not be used to endorse or promote products derived from this + * software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * Copyright (c) 1991 Gregory M. Christy + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by the author. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * $Id: chap.h,v 1.1 2004/05/04 12:32:33 jani Exp $ + */ + +#ifndef CHAP_H +#define CHAP_H + +/************************* +*** PUBLIC DEFINITIONS *** +*************************/ + +/* Code + ID + length */ +#define CHAP_HEADERLEN 4 + +/* + * CHAP codes. + */ + +#define CHAP_DIGEST_MD5 5 /* use MD5 algorithm */ +#define MD5_SIGNATURE_SIZE 16 /* 16 bytes in a MD5 message digest */ +#define CHAP_MICROSOFT 0x80 /* use Microsoft-compatible alg. */ +#define MS_CHAP_RESPONSE_LEN 49 /* Response length for MS-CHAP */ + +#define CHAP_CHALLENGE 1 +#define CHAP_RESPONSE 2 +#define CHAP_SUCCESS 3 +#define CHAP_FAILURE 4 + +/* + * Challenge lengths (for challenges we send) and other limits. + */ +#define MIN_CHALLENGE_LENGTH 32 +#define MAX_CHALLENGE_LENGTH 64 +#define MAX_RESPONSE_LENGTH 64 /* sufficient for MD5 or MS-CHAP */ + +/* + * Client (peer) states. + */ +#define CHAPCS_INITIAL 0 /* Lower layer down, not opened */ +#define CHAPCS_CLOSED 1 /* Lower layer up, not opened */ +#define CHAPCS_PENDING 2 /* Auth us to peer when lower up */ +#define CHAPCS_LISTEN 3 /* Listening for a challenge */ +#define CHAPCS_RESPONSE 4 /* Sent response, waiting for status */ +#define CHAPCS_OPEN 5 /* We've received Success */ + +/* + * Server (authenticator) states. + */ +#define CHAPSS_INITIAL 0 /* Lower layer down, not opened */ +#define CHAPSS_CLOSED 1 /* Lower layer up, not opened */ +#define CHAPSS_PENDING 2 /* Auth peer when lower up */ +#define CHAPSS_INITIAL_CHAL 3 /* We've sent the first challenge */ +#define CHAPSS_OPEN 4 /* We've sent a Success msg */ +#define CHAPSS_RECHALLENGE 5 /* We've sent another challenge */ +#define CHAPSS_BADAUTH 6 /* We've sent a Failure msg */ + +/************************ +*** PUBLIC DATA TYPES *** +************************/ + +/* + * Each interface is described by a chap structure. + */ + +typedef struct chap_state { + int unit; /* Interface unit number */ + int clientstate; /* Client state */ + int serverstate; /* Server state */ + u_char challenge[MAX_CHALLENGE_LENGTH]; /* last challenge string sent */ + u_char chal_len; /* challenge length */ + u_char chal_id; /* ID of last challenge */ + u_char chal_type; /* hash algorithm for challenges */ + u_char id; /* Current id */ + char *chal_name; /* Our name to use with challenge */ + int chal_interval; /* Time until we challenge peer again */ + int timeouttime; /* Timeout time in seconds */ + int max_transmits; /* Maximum # of challenge transmissions */ + int chal_transmits; /* Number of transmissions of challenge */ + int resp_transmits; /* Number of transmissions of response */ + u_char response[MAX_RESPONSE_LENGTH]; /* Response to send */ + u_char resp_length; /* length of response */ + u_char resp_id; /* ID for response messages */ + u_char resp_type; /* hash algorithm for responses */ + char *resp_name; /* Our name to send with response */ +} chap_state; + + +/****************** +*** PUBLIC DATA *** +******************/ +extern chap_state chap[]; + +extern struct protent chap_protent; + + +/*********************** +*** PUBLIC FUNCTIONS *** +***********************/ + +void ChapAuthWithPeer (int, char *, int); +void ChapAuthPeer (int, char *, int); + +#endif /* CHAP_H */ +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/chpms.c @@ -0,0 +1,398 @@ +/*** WARNING - THIS CODE HAS NOT BEEN FINISHED! ***/ +/***************************************************************************** +* chpms.c - Network MicroSoft Challenge Handshake Authentication Protocol program file. +* +* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. +* Copyright (c) 1997 by Global Election Systems Inc. All rights reserved. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY +* +* 03-01-01 Marc Boucher <marc@mbsi.ca> +* Ported to lwIP. +* 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc. +* Original based on BSD chap_ms.c. +*****************************************************************************/ +/* + * chap_ms.c - Microsoft MS-CHAP compatible implementation. + * + * Copyright (c) 1995 Eric Rosenquist, Strata Software Limited. + * http://www.strataware.com/ + * + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Eric Rosenquist. The name of the author may not be used to + * endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +/* + * Modifications by Lauri Pesonen / lpesonen@clinet.fi, april 1997 + * + * Implemented LANManager type password response to MS-CHAP challenges. + * Now pppd provides both NT style and LANMan style blocks, and the + * prefered is set by option "ms-lanman". Default is to use NT. + * The hash text (StdText) was taken from Win95 RASAPI32.DLL. + * + * You should also use DOMAIN\\USERNAME as described in README.MSCHAP80 + */ + +#define USE_CRYPT + + +#include "ppp.h" + +#if MSCHAP_SUPPORT > 0 + +#include "md4.h" +#ifndef USE_CRYPT +#include "des.h" +#endif +#include "chap.h" +#include "chpms.h" +#include "pppdebug.h" + + +/*************************/ +/*** LOCAL DEFINITIONS ***/ +/*************************/ + + +/************************/ +/*** LOCAL DATA TYPES ***/ +/************************/ +typedef struct { + u_char LANManResp[24]; + u_char NTResp[24]; + u_char UseNT; /* If 1, ignore the LANMan response field */ +} MS_ChapResponse; +/* We use MS_CHAP_RESPONSE_LEN, rather than sizeof(MS_ChapResponse), + in case this struct gets padded. */ + + + +/***********************************/ +/*** LOCAL FUNCTION DECLARATIONS ***/ +/***********************************/ + +/* XXX Don't know what to do with these. */ +extern void setkey(const char *); +extern void encrypt(char *, int); + +static void DesEncrypt (u_char *, u_char *, u_char *); +static void MakeKey (u_char *, u_char *); + +#ifdef USE_CRYPT +static void Expand (u_char *, u_char *); +static void Collapse (u_char *, u_char *); +#endif + +static void ChallengeResponse( + u_char *challenge, /* IN 8 octets */ + u_char *pwHash, /* IN 16 octets */ + u_char *response /* OUT 24 octets */ +); +static void ChapMS_NT( + char *rchallenge, + int rchallenge_len, + char *secret, + int secret_len, + MS_ChapResponse *response +); +static u_char Get7Bits( + u_char *input, + int startBit +); + + +/***********************************/ +/*** PUBLIC FUNCTION DEFINITIONS ***/ +/***********************************/ +void ChapMS( + chap_state *cstate, + char *rchallenge, + int rchallenge_len, + char *secret, + int secret_len +) +{ + MS_ChapResponse response; +#ifdef MSLANMAN + extern int ms_lanman; +#endif + +#if 0 + CHAPDEBUG((LOG_INFO, "ChapMS: secret is '%.*s'\n", secret_len, secret)); +#endif + BZERO(&response, sizeof(response)); + + /* Calculate both always */ + ChapMS_NT(rchallenge, rchallenge_len, secret, secret_len, &response); + +#ifdef MSLANMAN + ChapMS_LANMan(rchallenge, rchallenge_len, secret, secret_len, &response); + + /* prefered method is set by option */ + response.UseNT = !ms_lanman; +#else + response.UseNT = 1; +#endif + + BCOPY(&response, cstate->response, MS_CHAP_RESPONSE_LEN); + cstate->resp_length = MS_CHAP_RESPONSE_LEN; +} + + +/**********************************/ +/*** LOCAL FUNCTION DEFINITIONS ***/ +/**********************************/ +static void ChallengeResponse( + u_char *challenge, /* IN 8 octets */ + u_char *pwHash, /* IN 16 octets */ + u_char *response /* OUT 24 octets */ +) +{ + char ZPasswordHash[21]; + + BZERO(ZPasswordHash, sizeof(ZPasswordHash)); + BCOPY(pwHash, ZPasswordHash, 16); + +#if 0 + log_packet(ZPasswordHash, sizeof(ZPasswordHash), "ChallengeResponse - ZPasswordHash", LOG_DEBUG); +#endif + + DesEncrypt(challenge, ZPasswordHash + 0, response + 0); + DesEncrypt(challenge, ZPasswordHash + 7, response + 8); + DesEncrypt(challenge, ZPasswordHash + 14, response + 16); + +#if 0 + log_packet(response, 24, "ChallengeResponse - response", LOG_DEBUG); +#endif +} + + +#ifdef USE_CRYPT +static void DesEncrypt( + u_char *clear, /* IN 8 octets */ + u_char *key, /* IN 7 octets */ + u_char *cipher /* OUT 8 octets */ +) +{ + u_char des_key[8]; + u_char crypt_key[66]; + u_char des_input[66]; + + MakeKey(key, des_key); + + Expand(des_key, crypt_key); + setkey(crypt_key); + +#if 0 + CHAPDEBUG((LOG_INFO, "DesEncrypt: 8 octet input : %02X%02X%02X%02X%02X%02X%02X%02X\n", + clear[0], clear[1], clear[2], clear[3], clear[4], clear[5], clear[6], clear[7])); +#endif + + Expand(clear, des_input); + encrypt(des_input, 0); + Collapse(des_input, cipher); + +#if 0 + CHAPDEBUG((LOG_INFO, "DesEncrypt: 8 octet output: %02X%02X%02X%02X%02X%02X%02X%02X\n", + cipher[0], cipher[1], cipher[2], cipher[3], cipher[4], cipher[5], cipher[6], cipher[7])); +#endif +} + +#else /* USE_CRYPT */ + +static void DesEncrypt( + u_char *clear, /* IN 8 octets */ + u_char *key, /* IN 7 octets */ + u_char *cipher /* OUT 8 octets */ +) +{ + des_cblock des_key; + des_key_schedule key_schedule; + + MakeKey(key, des_key); + + des_set_key(&des_key, key_schedule); + +#if 0 + CHAPDEBUG((LOG_INFO, "DesEncrypt: 8 octet input : %02X%02X%02X%02X%02X%02X%02X%02X\n", + clear[0], clear[1], clear[2], clear[3], clear[4], clear[5], clear[6], clear[7])); +#endif + + des_ecb_encrypt((des_cblock *)clear, (des_cblock *)cipher, key_schedule, 1); + +#if 0 + CHAPDEBUG((LOG_INFO, "DesEncrypt: 8 octet output: %02X%02X%02X%02X%02X%02X%02X%02X\n", + cipher[0], cipher[1], cipher[2], cipher[3], cipher[4], cipher[5], cipher[6], cipher[7])); +#endif +} + +#endif /* USE_CRYPT */ + + +static u_char Get7Bits( + u_char *input, + int startBit +) +{ + register unsigned int word; + + word = (unsigned)input[startBit / 8] << 8; + word |= (unsigned)input[startBit / 8 + 1]; + + word >>= 15 - (startBit % 8 + 7); + + return word & 0xFE; +} + +#ifdef USE_CRYPT + +/* in == 8-byte string (expanded version of the 56-bit key) + * out == 64-byte string where each byte is either 1 or 0 + * Note that the low-order "bit" is always ignored by by setkey() + */ +static void Expand(u_char *in, u_char *out) +{ + int j, c; + int i; + + for(i = 0; i < 64; in++){ + c = *in; + for(j = 7; j >= 0; j--) + *out++ = (c >> j) & 01; + i += 8; + } +} + +/* The inverse of Expand + */ +static void Collapse(u_char *in, u_char *out) +{ + int j; + int i; + unsigned int c; + + for (i = 0; i < 64; i += 8, out++) { + c = 0; + for (j = 7; j >= 0; j--, in++) + c |= *in << j; + *out = c & 0xff; + } +} +#endif + +static void MakeKey( + u_char *key, /* IN 56 bit DES key missing parity bits */ + u_char *des_key /* OUT 64 bit DES key with parity bits added */ +) +{ + des_key[0] = Get7Bits(key, 0); + des_key[1] = Get7Bits(key, 7); + des_key[2] = Get7Bits(key, 14); + des_key[3] = Get7Bits(key, 21); + des_key[4] = Get7Bits(key, 28); + des_key[5] = Get7Bits(key, 35); + des_key[6] = Get7Bits(key, 42); + des_key[7] = Get7Bits(key, 49); + +#ifndef USE_CRYPT + des_set_odd_parity((des_cblock *)des_key); +#endif + +#if 0 + CHAPDEBUG((LOG_INFO, "MakeKey: 56-bit input : %02X%02X%02X%02X%02X%02X%02X\n", + key[0], key[1], key[2], key[3], key[4], key[5], key[6])); + CHAPDEBUG((LOG_INFO, "MakeKey: 64-bit output: %02X%02X%02X%02X%02X%02X%02X%02X\n", + des_key[0], des_key[1], des_key[2], des_key[3], des_key[4], des_key[5], des_key[6], des_key[7])); +#endif +} + +static void ChapMS_NT( + char *rchallenge, + int rchallenge_len, + char *secret, + int secret_len, + MS_ChapResponse *response +) +{ + int i; + MDstruct md4Context; + u_char unicodePassword[MAX_NT_PASSWORD * 2]; + static int low_byte_first = -1; + + /* Initialize the Unicode version of the secret (== password). */ + /* This implicitly supports 8-bit ISO8859/1 characters. */ + BZERO(unicodePassword, sizeof(unicodePassword)); + for (i = 0; i < secret_len; i++) + unicodePassword[i * 2] = (u_char)secret[i]; + + MDbegin(&md4Context); + MDupdate(&md4Context, unicodePassword, secret_len * 2 * 8); /* Unicode is 2 bytes/char, *8 for bit count */ + + if (low_byte_first == -1) + low_byte_first = (htons((unsigned short int)1) != 1); + if (low_byte_first == 0) + MDreverse((u_long *)&md4Context); /* sfb 961105 */ + + MDupdate(&md4Context, NULL, 0); /* Tell MD4 we're done */ + + ChallengeResponse(rchallenge, (char *)md4Context.buffer, response->NTResp); +} + +#ifdef MSLANMAN +static u_char *StdText = (u_char *)"KGS!@#$%"; /* key from rasapi32.dll */ + +static ChapMS_LANMan( + char *rchallenge, + int rchallenge_len, + char *secret, + int secret_len, + MS_ChapResponse *response +) +{ + int i; + u_char UcasePassword[MAX_NT_PASSWORD]; /* max is actually 14 */ + u_char PasswordHash[16]; + + /* LANMan password is case insensitive */ + BZERO(UcasePassword, sizeof(UcasePassword)); + for (i = 0; i < secret_len; i++) + UcasePassword[i] = (u_char)toupper(secret[i]); + DesEncrypt( StdText, UcasePassword + 0, PasswordHash + 0 ); + DesEncrypt( StdText, UcasePassword + 7, PasswordHash + 8 ); + ChallengeResponse(rchallenge, PasswordHash, response->LANManResp); +} +#endif + +#endif /* MSCHAP_SUPPORT */ +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/chpms.h @@ -0,0 +1,64 @@ +/***************************************************************************** +* chpms.h - Network Microsoft Challenge Handshake Protocol header file. +* +* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. +* portions Copyright (c) 1998 Global Election Systems Inc. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY +* +* 03-01-01 Marc Boucher <marc@mbsi.ca> +* Ported to lwIP. +* 98-01-30 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc. +* Original built from BSD network code. +******************************************************************************/ +/* + * chap.h - Challenge Handshake Authentication Protocol definitions. + * + * Copyright (c) 1995 Eric Rosenquist, Strata Software Limited. + * http://www.strataware.com/ + * + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Eric Rosenquist. The name of the author may not be used to + * endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * $Id: chpms.h,v 1.1 2004/05/04 12:32:33 jani Exp $ + */ + +#ifndef CHPMS_H +#define CHPMS_H + +#define MAX_NT_PASSWORD 256 /* Maximum number of (Unicode) chars in an NT password */ + +void ChapMS (chap_state *, char *, int, char *, int); + +#endif /* CHPMS_H */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/fsm.c @@ -0,0 +1,838 @@ +/***************************************************************************** +* fsm.c - Network Control Protocol Finite State Machine program file. +* +* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. +* portions Copyright (c) 1997 by Global Election Systems Inc. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY +* +* 03-01-01 Marc Boucher <marc@mbsi.ca> +* Ported to lwIP. +* 97-12-01 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc. +* Original based on BSD fsm.c. +*****************************************************************************/ +/* + * fsm.c - {Link, IP} Control Protocol Finite State Machine. + * + * Copyright (c) 1989 Carnegie Mellon University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Carnegie Mellon University. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + + +/* + * TODO: + * Randomize fsm id on link/init. + * Deal with variable outgoing MTU. + */ + +#include "ppp.h" +#if PPP_SUPPORT > 0 +#include "fsm.h" +#include "pppdebug.h" + + +/*************************/ +/*** LOCAL DEFINITIONS ***/ +/*************************/ + + +/************************/ +/*** LOCAL DATA TYPES ***/ +/************************/ + + +/***********************************/ +/*** LOCAL FUNCTION DECLARATIONS ***/ +/***********************************/ +static void fsm_timeout (void *); +static void fsm_rconfreq (fsm *, u_char, u_char *, int); +static void fsm_rconfack (fsm *, int, u_char *, int); +static void fsm_rconfnakrej (fsm *, int, int, u_char *, int); +static void fsm_rtermreq (fsm *, int, u_char *, int); +static void fsm_rtermack (fsm *); +static void fsm_rcoderej (fsm *, u_char *, int); +static void fsm_sconfreq (fsm *, int); + +#define PROTO_NAME(f) ((f)->callbacks->proto_name) + + +/******************************/ +/*** PUBLIC DATA STRUCTURES ***/ +/******************************/ + + +/*****************************/ +/*** LOCAL DATA STRUCTURES ***/ +/*****************************/ +int peer_mru[NUM_PPP]; + + +/***********************************/ +/*** PUBLIC FUNCTION DEFINITIONS ***/ +/***********************************/ + +/* + * fsm_init - Initialize fsm. + * + * Initialize fsm state. + */ +void fsm_init(fsm *f) +{ + f->state = INITIAL; + f->flags = 0; + f->id = 0; /* XXX Start with random id? */ + f->timeouttime = FSM_DEFTIMEOUT; + f->maxconfreqtransmits = FSM_DEFMAXCONFREQS; + f->maxtermtransmits = FSM_DEFMAXTERMREQS; + f->maxnakloops = FSM_DEFMAXNAKLOOPS; + f->term_reason_len = 0; +} + + +/* + * fsm_lowerup - The lower layer is up. + */ +void fsm_lowerup(fsm *f) +{ + int oldState = f->state; + + switch( f->state ){ + case INITIAL: + f->state = CLOSED; + break; + + case STARTING: + if( f->flags & OPT_SILENT ) + f->state = STOPPED; + else { + /* Send an initial configure-request */ + fsm_sconfreq(f, 0); + f->state = REQSENT; + } + break; + + default: + FSMDEBUG((LOG_INFO, "%s: Up event in state %d!\n", + PROTO_NAME(f), f->state)); + } + + FSMDEBUG((LOG_INFO, "%s: lowerup state %d -> %d\n", + PROTO_NAME(f), oldState, f->state)); +} + + +/* + * fsm_lowerdown - The lower layer is down. + * + * Cancel all timeouts and inform upper layers. + */ +void fsm_lowerdown(fsm *f) +{ + int oldState = f->state; + + switch( f->state ){ + case CLOSED: + f->state = INITIAL; + break; + + case STOPPED: + f->state = STARTING; + if( f->callbacks->starting ) + (*f->callbacks->starting)(f); + break; + + case CLOSING: + f->state = INITIAL; + UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */ + break; + + case STOPPING: + case REQSENT: + case ACKRCVD: + case ACKSENT: + f->state = STARTING; + UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */ + break; + + case OPENED: + if( f->callbacks->down ) + (*f->callbacks->down)(f); + f->state = STARTING; + break; + + default: + FSMDEBUG((LOG_INFO, "%s: Down event in state %d!\n", + PROTO_NAME(f), f->state)); + } + + FSMDEBUG((LOG_INFO, "%s: lowerdown state %d -> %d\n", + PROTO_NAME(f), oldState, f->state)); +} + + +/* + * fsm_open - Link is allowed to come up. + */ +void fsm_open(fsm *f) +{ + int oldState = f->state; + + switch( f->state ){ + case INITIAL: + f->state = STARTING; + if( f->callbacks->starting ) + (*f->callbacks->starting)(f); + break; + + case CLOSED: + if( f->flags & OPT_SILENT ) + f->state = STOPPED; + else { + /* Send an initial configure-request */ + fsm_sconfreq(f, 0); + f->state = REQSENT; + } + break; + + case CLOSING: + f->state = STOPPING; + /* fall through */ + case STOPPED: + case OPENED: + if( f->flags & OPT_RESTART ){ + fsm_lowerdown(f); + fsm_lowerup(f); + } + break; + } + + FSMDEBUG((LOG_INFO, "%s: open state %d -> %d\n", + PROTO_NAME(f), oldState, f->state)); +} + + +/* + * fsm_close - Start closing connection. + * + * Cancel timeouts and either initiate close or possibly go directly to + * the CLOSED state. + */ +void fsm_close(fsm *f, char *reason) +{ + int oldState = f->state; + + f->term_reason = reason; + f->term_reason_len = (reason == NULL? 0: strlen(reason)); + switch( f->state ){ + case STARTING: + f->state = INITIAL; + break; + case STOPPED: + f->state = CLOSED; + break; + case STOPPING: + f->state = CLOSING; + break; + + case REQSENT: + case ACKRCVD: + case ACKSENT: + case OPENED: + if( f->state != OPENED ) + UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */ + else if( f->callbacks->down ) + (*f->callbacks->down)(f); /* Inform upper layers we're down */ + + /* Init restart counter, send Terminate-Request */ + f->retransmits = f->maxtermtransmits; + fsm_sdata(f, TERMREQ, f->reqid = ++f->id, + (u_char *) f->term_reason, f->term_reason_len); + TIMEOUT(fsm_timeout, f, f->timeouttime); + --f->retransmits; + + f->state = CLOSING; + break; + } + + FSMDEBUG((LOG_INFO, "%s: close reason=%s state %d -> %d\n", + PROTO_NAME(f), reason, oldState, f->state)); +} + + +/* + * fsm_sdata - Send some data. + * + * Used for all packets sent to our peer by this module. + */ +void fsm_sdata( + fsm *f, + u_char code, + u_char id, + u_char *data, + int datalen +) +{ + u_char *outp; + int outlen; + + /* Adjust length to be smaller than MTU */ + outp = outpacket_buf[f->unit]; + if (datalen > peer_mru[f->unit] - (int)HEADERLEN) + datalen = peer_mru[f->unit] - HEADERLEN; + if (datalen && data != outp + PPP_HDRLEN + HEADERLEN) + BCOPY(data, outp + PPP_HDRLEN + HEADERLEN, datalen); + outlen = datalen + HEADERLEN; + MAKEHEADER(outp, f->protocol); + PUTCHAR(code, outp); + PUTCHAR(id, outp); + PUTSHORT(outlen, outp); + pppWrite(f->unit, outpacket_buf[f->unit], outlen + PPP_HDRLEN); + FSMDEBUG((LOG_INFO, "fsm_sdata(%s): Sent code %d,%d,%d.\n", + PROTO_NAME(f), code, id, outlen)); +} + + +/* + * fsm_input - Input packet. + */ +void fsm_input(fsm *f, u_char *inpacket, int l) +{ + u_char *inp = inpacket; + u_char code, id; + int len; + + /* + * Parse header (code, id and length). + * If packet too short, drop it. + */ + if (l < HEADERLEN) { + FSMDEBUG((LOG_WARNING, "fsm_input(%x): Rcvd short header.\n", + f->protocol)); + return; + } + GETCHAR(code, inp); + GETCHAR(id, inp); + GETSHORT(len, inp); + if (len < HEADERLEN) { + FSMDEBUG((LOG_INFO, "fsm_input(%x): Rcvd illegal length.\n", + f->protocol)); + return; + } + if (len > l) { + FSMDEBUG((LOG_INFO, "fsm_input(%x): Rcvd short packet.\n", + f->protocol)); + return; + } + len -= HEADERLEN; /* subtract header length */ + + if( f->state == INITIAL || f->state == STARTING ){ + FSMDEBUG((LOG_INFO, "fsm_input(%x): Rcvd packet in state %d.\n", + f->protocol, f->state)); + return; + } + FSMDEBUG((LOG_INFO, "fsm_input(%s):%d,%d,%d\n", PROTO_NAME(f), code, id, l)); + /* + * Action depends on code. + */ + switch (code) { + case CONFREQ: + fsm_rconfreq(f, id, inp, len); + break; + + case CONFACK: + fsm_rconfack(f, id, inp, len); + break; + + case CONFNAK: + case CONFREJ: + fsm_rconfnakrej(f, code, id, inp, len); + break; + + case TERMREQ: + fsm_rtermreq(f, id, inp, len); + break; + + case TERMACK: + fsm_rtermack(f); + break; + + case CODEREJ: + fsm_rcoderej(f, inp, len); + break; + + default: + if( !f->callbacks->extcode + || !(*f->callbacks->extcode)(f, code, id, inp, len) ) + fsm_sdata(f, CODEREJ, ++f->id, inpacket, len + HEADERLEN); + break; + } +} + + +/* + * fsm_protreject - Peer doesn't speak this protocol. + * + * Treat this as a catastrophic error (RXJ-). + */ +void fsm_protreject(fsm *f) +{ + switch( f->state ){ + case CLOSING: + UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */ + /* fall through */ + case CLOSED: + f->state = CLOSED; + if( f->callbacks->finished ) + (*f->callbacks->finished)(f); + break; + + case STOPPING: + case REQSENT: + case ACKRCVD: + case ACKSENT: + UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */ + /* fall through */ + case STOPPED: + f->state = STOPPED; + if( f->callbacks->finished ) + (*f->callbacks->finished)(f); + break; + + case OPENED: + if( f->callbacks->down ) + (*f->callbacks->down)(f); + + /* Init restart counter, send Terminate-Request */ + f->retransmits = f->maxtermtransmits; + fsm_sdata(f, TERMREQ, f->reqid = ++f->id, + (u_char *) f->term_reason, f->term_reason_len); + TIMEOUT(fsm_timeout, f, f->timeouttime); + --f->retransmits; + + f->state = STOPPING; + break; + + default: + FSMDEBUG((LOG_INFO, "%s: Protocol-reject event in state %d!\n", + PROTO_NAME(f), f->state)); + } +} + + + + + +/**********************************/ +/*** LOCAL FUNCTION DEFINITIONS ***/ +/**********************************/ + +/* + * fsm_timeout - Timeout expired. + */ +static void fsm_timeout(void *arg) +{ + fsm *f = (fsm *) arg; + + switch (f->state) { + case CLOSING: + case STOPPING: + if( f->retransmits <= 0 ){ + FSMDEBUG((LOG_WARNING, "%s: timeout sending Terminate-Request state=%d\n", + PROTO_NAME(f), f->state)); + /* + * We've waited for an ack long enough. Peer probably heard us. + */ + f->state = (f->state == CLOSING)? CLOSED: STOPPED; + if( f->callbacks->finished ) + (*f->callbacks->finished)(f); + } else { + FSMDEBUG((LOG_WARNING, "%s: timeout resending Terminate-Requests state=%d\n", + PROTO_NAME(f), f->state)); + /* Send Terminate-Request */ + fsm_sdata(f, TERMREQ, f->reqid = ++f->id, + (u_char *) f->term_reason, f->term_reason_len); + TIMEOUT(fsm_timeout, f, f->timeouttime); + --f->retransmits; + } + break; + + case REQSENT: + case ACKRCVD: + case ACKSENT: + if (f->retransmits <= 0) { + FSMDEBUG((LOG_WARNING, "%s: timeout sending Config-Requests state=%d\n", + PROTO_NAME(f), f->state)); + f->state = STOPPED; + if( (f->flags & OPT_PASSIVE) == 0 && f->callbacks->finished ) + (*f->callbacks->finished)(f); + + } else { + FSMDEBUG((LOG_WARNING, "%s: timeout resending Config-Request state=%d\n", + PROTO_NAME(f), f->state)); + /* Retransmit the configure-request */ + if (f->callbacks->retransmit) + (*f->callbacks->retransmit)(f); + fsm_sconfreq(f, 1); /* Re-send Configure-Request */ + if( f->state == ACKRCVD ) + f->state = REQSENT; + } + break; + + default: + FSMDEBUG((LOG_INFO, "%s: Timeout event in state %d!\n", + PROTO_NAME(f), f->state)); + } +} + + +/* + * fsm_rconfreq - Receive Configure-Request. + */ +static void fsm_rconfreq(fsm *f, u_char id, u_char *inp, int len) +{ + int code, reject_if_disagree; + + FSMDEBUG((LOG_INFO, "fsm_rconfreq(%s): Rcvd id %d state=%d\n", + PROTO_NAME(f), id, f->state)); + switch( f->state ){ + case CLOSED: + /* Go away, we're closed */ + fsm_sdata(f, TERMACK, id, NULL, 0); + return; + case CLOSING: + case STOPPING: + return; + + case OPENED: + /* Go down and restart negotiation */ + if( f->callbacks->down ) + (*f->callbacks->down)(f); /* Inform upper layers */ + fsm_sconfreq(f, 0); /* Send initial Configure-Request */ + break; + + case STOPPED: + /* Negotiation started by our peer */ + fsm_sconfreq(f, 0); /* Send initial Configure-Request */ + f->state = REQSENT; + break; + } + + /* + * Pass the requested configuration options + * to protocol-specific code for checking. + */ + if (f->callbacks->reqci){ /* Check CI */ + reject_if_disagree = (f->nakloops >= f->maxnakloops); + code = (*f->callbacks->reqci)(f, inp, &len, reject_if_disagree); + } + else if (len) + code = CONFREJ; /* Reject all CI */ + else + code = CONFACK; + + /* send the Ack, Nak or Rej to the peer */ + fsm_sdata(f, (u_char)code, id, inp, len); + + if (code == CONFACK) { + if (f->state == ACKRCVD) { + UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */ + f->state = OPENED; + if (f->callbacks->up) + (*f->callbacks->up)(f); /* Inform upper layers */ + } + else + f->state = ACKSENT; + f->nakloops = 0; + } + else { + /* we sent CONFACK or CONFREJ */ + if (f->state != ACKRCVD) + f->state = REQSENT; + if( code == CONFNAK ) + ++f->nakloops; + } +} + + +/* + * fsm_rconfack - Receive Configure-Ack. + */ +static void fsm_rconfack(fsm *f, int id, u_char *inp, int len) +{ + FSMDEBUG((LOG_INFO, "fsm_rconfack(%s): Rcvd id %d state=%d\n", + PROTO_NAME(f), id, f->state)); + + if (id != f->reqid || f->seen_ack) /* Expected id? */ + return; /* Nope, toss... */ + if( !(f->callbacks->ackci? (*f->callbacks->ackci)(f, inp, len): + (len == 0)) ){ + /* Ack is bad - ignore it */ + FSMDEBUG((LOG_INFO, "%s: received bad Ack (length %d)\n", + PROTO_NAME(f), len)); + return; + } + f->seen_ack = 1; + + switch (f->state) { + case CLOSED: + case STOPPED: + fsm_sdata(f, TERMACK, (u_char)id, NULL, 0); + break; + + case REQSENT: + f->state = ACKRCVD; + f->retransmits = f->maxconfreqtransmits; + break; + + case ACKRCVD: + /* Huh? an extra valid Ack? oh well... */ + UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */ + fsm_sconfreq(f, 0); + f->state = REQSENT; + break; + + case ACKSENT: + UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */ + f->state = OPENED; + f->retransmits = f->maxconfreqtransmits; + if (f->callbacks->up) + (*f->callbacks->up)(f); /* Inform upper layers */ + break; + + case OPENED: + /* Go down and restart negotiation */ + if (f->callbacks->down) + (*f->callbacks->down)(f); /* Inform upper layers */ + fsm_sconfreq(f, 0); /* Send initial Configure-Request */ + f->state = REQSENT; + break; + } +} + + +/* + * fsm_rconfnakrej - Receive Configure-Nak or Configure-Reject. + */ +static void fsm_rconfnakrej(fsm *f, int code, int id, u_char *inp, int len) +{ + int (*proc) (fsm *, u_char *, int); + int ret; + + FSMDEBUG((LOG_INFO, "fsm_rconfnakrej(%s): Rcvd id %d state=%d\n", + PROTO_NAME(f), id, f->state)); + + if (id != f->reqid || f->seen_ack) /* Expected id? */ + return; /* Nope, toss... */ + proc = (code == CONFNAK)? f->callbacks->nakci: f->callbacks->rejci; + if (!proc || !(ret = proc(f, inp, len))) { + /* Nak/reject is bad - ignore it */ + FSMDEBUG((LOG_INFO, "%s: received bad %s (length %d)\n", + PROTO_NAME(f), (code==CONFNAK? "Nak": "reject"), len)); + return; + } + f->seen_ack = 1; + + switch (f->state) { + case CLOSED: + case STOPPED: + fsm_sdata(f, TERMACK, (u_char)id, NULL, 0); + break; + + case REQSENT: + case ACKSENT: + /* They didn't agree to what we wanted - try another request */ + UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */ + if (ret < 0) + f->state = STOPPED; /* kludge for stopping CCP */ + else + fsm_sconfreq(f, 0); /* Send Configure-Request */ + break; + + case ACKRCVD: + /* Got a Nak/reject when we had already had an Ack?? oh well... */ + UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */ + fsm_sconfreq(f, 0); + f->state = REQSENT; + break; + + case OPENED: + /* Go down and restart negotiation */ + if (f->callbacks->down) + (*f->callbacks->down)(f); /* Inform upper layers */ + fsm_sconfreq(f, 0); /* Send initial Configure-Request */ + f->state = REQSENT; + break; + } +} + + +/* + * fsm_rtermreq - Receive Terminate-Req. + */ +static void fsm_rtermreq(fsm *f, int id, u_char *p, int len) +{ + FSMDEBUG((LOG_INFO, "fsm_rtermreq(%s): Rcvd id %d state=%d\n", + PROTO_NAME(f), id, f->state)); + + switch (f->state) { + case ACKRCVD: + case ACKSENT: + f->state = REQSENT; /* Start over but keep trying */ + break; + + case OPENED: + if (len > 0) { + FSMDEBUG((LOG_INFO, "%s terminated by peer (%x)\n", PROTO_NAME(f), p)); + } else { + FSMDEBUG((LOG_INFO, "%s terminated by peer\n", PROTO_NAME(f))); + } + if (f->callbacks->down) + (*f->callbacks->down)(f); /* Inform upper layers */ + f->retransmits = 0; + f->state = STOPPING; + TIMEOUT(fsm_timeout, f, f->timeouttime); + break; + } + + fsm_sdata(f, TERMACK, (u_char)id, NULL, 0); +} + + +/* + * fsm_rtermack - Receive Terminate-Ack. + */ +static void fsm_rtermack(fsm *f) +{ + FSMDEBUG((LOG_INFO, "fsm_rtermack(%s): state=%d\n", + PROTO_NAME(f), f->state)); + + switch (f->state) { + case CLOSING: + UNTIMEOUT(fsm_timeout, f); + f->state = CLOSED; + if( f->callbacks->finished ) + (*f->callbacks->finished)(f); + break; + case STOPPING: + UNTIMEOUT(fsm_timeout, f); + f->state = STOPPED; + if( f->callbacks->finished ) + (*f->callbacks->finished)(f); + break; + + case ACKRCVD: + f->state = REQSENT; + break; + + case OPENED: + if (f->callbacks->down) + (*f->callbacks->down)(f); /* Inform upper layers */ + fsm_sconfreq(f, 0); + break; + } +} + + +/* + * fsm_rcoderej - Receive an Code-Reject. + */ +static void fsm_rcoderej(fsm *f, u_char *inp, int len) +{ + u_char code, id; + + FSMDEBUG((LOG_INFO, "fsm_rcoderej(%s): state=%d\n", + PROTO_NAME(f), f->state)); + + if (len < HEADERLEN) { + FSMDEBUG((LOG_INFO, "fsm_rcoderej: Rcvd short Code-Reject packet!\n")); + return; + } + GETCHAR(code, inp); + GETCHAR(id, inp); + FSMDEBUG((LOG_WARNING, "%s: Rcvd Code-Reject for code %d, id %d\n", + PROTO_NAME(f), code, id)); + + if( f->state == ACKRCVD ) + f->state = REQSENT; +} + + +/* + * fsm_sconfreq - Send a Configure-Request. + */ +static void fsm_sconfreq(fsm *f, int retransmit) +{ + u_char *outp; + int cilen; + + if( f->state != REQSENT && f->state != ACKRCVD && f->state != ACKSENT ){ + /* Not currently negotiating - reset options */ + if( f->callbacks->resetci ) + (*f->callbacks->resetci)(f); + f->nakloops = 0; + } + + if( !retransmit ){ + /* New request - reset retransmission counter, use new ID */ + f->retransmits = f->maxconfreqtransmits; + f->reqid = ++f->id; + } + + f->seen_ack = 0; + + /* + * Make up the request packet + */ + outp = outpacket_buf[f->unit] + PPP_HDRLEN + HEADERLEN; + if( f->callbacks->cilen && f->callbacks->addci ){ + cilen = (*f->callbacks->cilen)(f); + if( cilen > peer_mru[f->unit] - (int)HEADERLEN ) + cilen = peer_mru[f->unit] - HEADERLEN; + if (f->callbacks->addci) + (*f->callbacks->addci)(f, outp, &cilen); + } else + cilen = 0; + + /* send the request to our peer */ + fsm_sdata(f, CONFREQ, f->reqid, outp, cilen); + + /* start the retransmit timer */ + --f->retransmits; + TIMEOUT(fsm_timeout, f, f->timeouttime); + + FSMDEBUG((LOG_INFO, "%s: sending Configure-Request, id %d\n", + PROTO_NAME(f), f->reqid)); +} + +#endif /* PPP_SUPPORT */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/fsm.h @@ -0,0 +1,187 @@ +/***************************************************************************** +* fsm.h - Network Control Protocol Finite State Machine header file. +* +* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. +* Copyright (c) 1997 Global Election Systems Inc. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY +* +* 03-01-01 Marc Boucher <marc@mbsi.ca> +* Ported to lwIP. +* 97-11-05 Guy Lancaster <glanca@gesn.com>, Global Election Systems Inc. +* Original based on BSD code. +*****************************************************************************/ +/* + * fsm.h - {Link, IP} Control Protocol Finite State Machine definitions. + * + * Copyright (c) 1989 Carnegie Mellon University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Carnegie Mellon University. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * $Id: fsm.h,v 1.1 2004/05/04 12:32:33 jani Exp $ + */ + +#ifndef FSM_H +#define FSM_H + + +/***************************************************************************** +************************* PUBLIC DEFINITIONS ********************************* +*****************************************************************************/ +/* + * LCP Packet header = Code, id, length. + */ +#define HEADERLEN (sizeof (u_char) + sizeof (u_char) + sizeof (u_short)) + + +/* + * CP (LCP, IPCP, etc.) codes. + */ +#define CONFREQ 1 /* Configuration Request */ +#define CONFACK 2 /* Configuration Ack */ +#define CONFNAK 3 /* Configuration Nak */ +#define CONFREJ 4 /* Configuration Reject */ +#define TERMREQ 5 /* Termination Request */ +#define TERMACK 6 /* Termination Ack */ +#define CODEREJ 7 /* Code Reject */ + +/* + * Link states. + */ +#define INITIAL 0 /* Down, hasn't been opened */ +#define STARTING 1 /* Down, been opened */ +#define CLOSED 2 /* Up, hasn't been opened */ +#define STOPPED 3 /* Open, waiting for down event */ +#define CLOSING 4 /* Terminating the connection, not open */ +#define STOPPING 5 /* Terminating, but open */ +#define REQSENT 6 /* We've sent a Config Request */ +#define ACKRCVD 7 /* We've received a Config Ack */ +#define ACKSENT 8 /* We've sent a Config Ack */ +#define OPENED 9 /* Connection available */ + + +/* + * Flags - indicate options controlling FSM operation + */ +#define OPT_PASSIVE 1 /* Don't die if we don't get a response */ +#define OPT_RESTART 2 /* Treat 2nd OPEN as DOWN, UP */ +#define OPT_SILENT 4 /* Wait for peer to speak first */ + + +/***************************************************************************** +************************* PUBLIC DATA TYPES ********************************** +*****************************************************************************/ +/* + * Each FSM is described by an fsm structure and fsm callbacks. + */ +typedef struct fsm { + int unit; /* Interface unit number */ + u_short protocol; /* Data Link Layer Protocol field value */ + int state; /* State */ + int flags; /* Contains option bits */ + u_char id; /* Current id */ + u_char reqid; /* Current request id */ + u_char seen_ack; /* Have received valid Ack/Nak/Rej to Req */ + int timeouttime; /* Timeout time in milliseconds */ + int maxconfreqtransmits;/* Maximum Configure-Request transmissions */ + int retransmits; /* Number of retransmissions left */ + int maxtermtransmits; /* Maximum Terminate-Request transmissions */ + int nakloops; /* Number of nak loops since last ack */ + int maxnakloops; /* Maximum number of nak loops tolerated */ + struct fsm_callbacks* callbacks;/* Callback routines */ + char* term_reason; /* Reason for closing protocol */ + int term_reason_len; /* Length of term_reason */ +} fsm; + + +typedef struct fsm_callbacks { + void (*resetci) /* Reset our Configuration Information */ + (fsm*); + int (*cilen) /* Length of our Configuration Information */ + (fsm*); + void (*addci) /* Add our Configuration Information */ + (fsm*, u_char*, int*); + int (*ackci) /* ACK our Configuration Information */ + (fsm*, u_char*, int); + int (*nakci) /* NAK our Configuration Information */ + (fsm*, u_char*, int); + int (*rejci) /* Reject our Configuration Information */ + (fsm*, u_char*, int); + int (*reqci) /* Request peer's Configuration Information */ + (fsm*, u_char*, int*, int); + void (*up) /* Called when fsm reaches OPENED state */ + (fsm*); + void (*down) /* Called when fsm leaves OPENED state */ + (fsm*); + void (*starting) /* Called when we want the lower layer */ + (fsm*); + void (*finished) /* Called when we don't want the lower layer */ + (fsm*); + void (*protreject) /* Called when Protocol-Reject received */ + (int); + void (*retransmit) /* Retransmission is necessary */ + (fsm*); + int (*extcode) /* Called when unknown code received */ + (fsm*, int, u_char, u_char*, int); + char *proto_name; /* String name for protocol (for messages) */ +} fsm_callbacks; + + +/***************************************************************************** +*********************** PUBLIC DATA STRUCTURES ******************************* +*****************************************************************************/ +/* + * Variables + */ +extern int peer_mru[]; /* currently negotiated peer MRU (per unit) */ + + +/***************************************************************************** +************************** PUBLIC FUNCTIONS ********************************** +*****************************************************************************/ + +/* + * Prototypes + */ +void fsm_init (fsm*); +void fsm_lowerup (fsm*); +void fsm_lowerdown (fsm*); +void fsm_open (fsm*); +void fsm_close (fsm*, char*); +void fsm_input (fsm*, u_char*, int); +void fsm_protreject (fsm*); +void fsm_sdata (fsm*, u_char, u_char, u_char*, int); + + +#endif /* FSM_H */ +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/ipcp.c @@ -0,0 +1,1375 @@ +/***************************************************************************** +* ipcp.c - Network PPP IP Control Protocol program file. +* +* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. +* portions Copyright (c) 1997 by Global Election Systems Inc. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY +* +* 03-01-01 Marc Boucher <marc@mbsi.ca> +* Ported to lwIP. +* 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc. +* Original. +*****************************************************************************/ +/* + * ipcp.c - PPP IP Control Protocol. + * + * Copyright (c) 1989 Carnegie Mellon University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Carnegie Mellon University. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +#include "ppp.h" +#if PPP_SUPPORT > 0 +#include "auth.h" +#include "fsm.h" +#include "vj.h" +#include "ipcp.h" +#include "pppdebug.h" + + +/*************************/ +/*** LOCAL DEFINITIONS ***/ +/*************************/ +/* #define OLD_CI_ADDRS 1 */ /* Support deprecated address negotiation. */ + +/* + * Lengths of configuration options. + */ +#define CILEN_VOID 2 +#define CILEN_COMPRESS 4 /* min length for compression protocol opt. */ +#define CILEN_VJ 6 /* length for RFC1332 Van-Jacobson opt. */ +#define CILEN_ADDR 6 /* new-style single address option */ +#define CILEN_ADDRS 10 /* old-style dual address option */ + + + +/***********************************/ +/*** LOCAL FUNCTION DECLARATIONS ***/ +/***********************************/ +/* + * Callbacks for fsm code. (CI = Configuration Information) + */ +static void ipcp_resetci (fsm *); /* Reset our CI */ +static int ipcp_cilen (fsm *); /* Return length of our CI */ +static void ipcp_addci (fsm *, u_char *, int *); /* Add our CI */ +static int ipcp_ackci (fsm *, u_char *, int); /* Peer ack'd our CI */ +static int ipcp_nakci (fsm *, u_char *, int); /* Peer nak'd our CI */ +static int ipcp_rejci (fsm *, u_char *, int); /* Peer rej'd our CI */ +static int ipcp_reqci (fsm *, u_char *, int *, int); /* Rcv CI */ +static void ipcp_up (fsm *); /* We're UP */ +static void ipcp_down (fsm *); /* We're DOWN */ +#if 0 +static void ipcp_script (fsm *, char *); /* Run an up/down script */ +#endif +static void ipcp_finished (fsm *); /* Don't need lower layer */ + +/* + * Protocol entry points from main code. + */ +static void ipcp_init (int); +static void ipcp_open (int); +static void ipcp_close (int, char *); +static void ipcp_lowerup (int); +static void ipcp_lowerdown (int); +static void ipcp_input (int, u_char *, int); +static void ipcp_protrej (int); + +static void ipcp_clear_addrs (int); + +#define CODENAME(x) ((x) == CONFACK ? "ACK" : \ + (x) == CONFNAK ? "NAK" : "REJ") + + + +/******************************/ +/*** PUBLIC DATA STRUCTURES ***/ +/******************************/ +/* global vars */ +ipcp_options ipcp_wantoptions[NUM_PPP]; /* Options that we want to request */ +ipcp_options ipcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */ +ipcp_options ipcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */ +ipcp_options ipcp_hisoptions[NUM_PPP]; /* Options that we ack'd */ + +fsm ipcp_fsm[NUM_PPP]; /* IPCP fsm structure */ + +struct protent ipcp_protent = { + PPP_IPCP, + ipcp_init, + ipcp_input, + ipcp_protrej, + ipcp_lowerup, + ipcp_lowerdown, + ipcp_open, + ipcp_close, +#if 0 + ipcp_printpkt, + NULL, +#endif + 1, + "IPCP", +#if 0 + ip_check_options, + NULL, + ip_active_pkt +#endif +}; + + + +/*****************************/ +/*** LOCAL DATA STRUCTURES ***/ +/*****************************/ +/* local vars */ +static int cis_received[NUM_PPP]; /* # Conf-Reqs received */ +static int default_route_set[NUM_PPP]; /* Have set up a default route */ + +static fsm_callbacks ipcp_callbacks = { /* IPCP callback routines */ + ipcp_resetci, /* Reset our Configuration Information */ + ipcp_cilen, /* Length of our Configuration Information */ + ipcp_addci, /* Add our Configuration Information */ + ipcp_ackci, /* ACK our Configuration Information */ + ipcp_nakci, /* NAK our Configuration Information */ + ipcp_rejci, /* Reject our Configuration Information */ + ipcp_reqci, /* Request peer's Configuration Information */ + ipcp_up, /* Called when fsm reaches OPENED state */ + ipcp_down, /* Called when fsm leaves OPENED state */ + NULL, /* Called when we want the lower layer up */ + ipcp_finished, /* Called when we want the lower layer down */ + NULL, /* Called when Protocol-Reject received */ + NULL, /* Retransmission is necessary */ + NULL, /* Called to handle protocol-specific codes */ + "IPCP" /* String name of protocol */ +}; + + + +/**********************************/ +/*** LOCAL FUNCTION DEFINITIONS ***/ +/**********************************/ + +/* + * Non-standard inet_ntoa left here for compat with original ppp + * sources. Assumes u32_t instead of struct in_addr. + */ + +char * _inet_ntoa(u32_t n) +{ + struct in_addr ia; + ia.s_addr = n; + return inet_ntoa(ia); +} + +#define inet_ntoa _inet_ntoa + +/* + * ipcp_init - Initialize IPCP. + */ +static void ipcp_init(int unit) +{ + fsm *f = &ipcp_fsm[unit]; + ipcp_options *wo = &ipcp_wantoptions[unit]; + ipcp_options *ao = &ipcp_allowoptions[unit]; + + f->unit = unit; + f->protocol = PPP_IPCP; + f->callbacks = &ipcp_callbacks; + fsm_init(&ipcp_fsm[unit]); + + memset(wo, 0, sizeof(*wo)); + memset(ao, 0, sizeof(*ao)); + + wo->neg_addr = 1; + wo->ouraddr = 0; +#if VJ_SUPPORT > 0 + wo->neg_vj = 1; +#else + wo->neg_vj = 0; +#endif + wo->vj_protocol = IPCP_VJ_COMP; + wo->maxslotindex = MAX_SLOTS - 1; + wo->cflag = 0; + + wo->default_route = 1; + + ao->neg_addr = 1; +#if VJ_SUPPORT > 0 + ao->neg_vj = 1; +#else + ao->neg_vj = 0; +#endif + ao->maxslotindex = MAX_SLOTS - 1; + ao->cflag = 1; + + ao->default_route = 1; +} + + +/* + * ipcp_open - IPCP is allowed to come up. + */ +static void ipcp_open(int unit) +{ + fsm_open(&ipcp_fsm[unit]); +} + + +/* + * ipcp_close - Take IPCP down. + */ +static void ipcp_close(int unit, char *reason) +{ + fsm_close(&ipcp_fsm[unit], reason); +} + + +/* + * ipcp_lowerup - The lower layer is up. + */ +static void ipcp_lowerup(int unit) +{ + fsm_lowerup(&ipcp_fsm[unit]); +} + + +/* + * ipcp_lowerdown - The lower layer is down. + */ +static void ipcp_lowerdown(int unit) +{ + fsm_lowerdown(&ipcp_fsm[unit]); +} + + +/* + * ipcp_input - Input IPCP packet. + */ +static void ipcp_input(int unit, u_char *p, int len) +{ + fsm_input(&ipcp_fsm[unit], p, len); +} + + +/* + * ipcp_protrej - A Protocol-Reject was received for IPCP. + * + * Pretend the lower layer went down, so we shut up. + */ +static void ipcp_protrej(int unit) +{ + fsm_lowerdown(&ipcp_fsm[unit]); +} + + +/* + * ipcp_resetci - Reset our CI. + */ +static void ipcp_resetci(fsm *f) +{ + ipcp_options *wo = &ipcp_wantoptions[f->unit]; + + wo->req_addr = wo->neg_addr && ipcp_allowoptions[f->unit].neg_addr; + if (wo->ouraddr == 0) + wo->accept_local = 1; + if (wo->hisaddr == 0) + wo->accept_remote = 1; + /* Request DNS addresses from the peer */ + wo->req_dns1 = ppp_settings.usepeerdns; + wo->req_dns2 = ppp_settings.usepeerdns; + ipcp_gotoptions[f->unit] = *wo; + cis_received[f->unit] = 0; +} + + +/* + * ipcp_cilen - Return length of our CI. + */ +static int ipcp_cilen(fsm *f) +{ + ipcp_options *go = &ipcp_gotoptions[f->unit]; + ipcp_options *wo = &ipcp_wantoptions[f->unit]; + ipcp_options *ho = &ipcp_hisoptions[f->unit]; + +#define LENCIVJ(neg, old) (neg ? (old? CILEN_COMPRESS : CILEN_VJ) : 0) +#define LENCIADDR(neg, old) (neg ? (old? CILEN_ADDRS : CILEN_ADDR) : 0) +#define LENCIDNS(neg) (neg ? (CILEN_ADDR) : 0) + + /* + * First see if we want to change our options to the old + * forms because we have received old forms from the peer. + */ + if (wo->neg_addr && !go->neg_addr && !go->old_addrs) { + /* use the old style of address negotiation */ + go->neg_addr = 1; + go->old_addrs = 1; + } + if (wo->neg_vj && !go->neg_vj && !go->old_vj) { + /* try an older style of VJ negotiation */ + if (cis_received[f->unit] == 0) { + /* keep trying the new style until we see some CI from the peer */ + go->neg_vj = 1; + } else { + /* use the old style only if the peer did */ + if (ho->neg_vj && ho->old_vj) { + go->neg_vj = 1; + go->old_vj = 1; + go->vj_protocol = ho->vj_protocol; + } + } + } + + return (LENCIADDR(go->neg_addr, go->old_addrs) + + LENCIVJ(go->neg_vj, go->old_vj) + + LENCIDNS(go->req_dns1) + + LENCIDNS(go->req_dns2)); +} + + +/* + * ipcp_addci - Add our desired CIs to a packet. + */ +static void ipcp_addci(fsm *f, u_char *ucp, int *lenp) +{ + ipcp_options *go = &ipcp_gotoptions[f->unit]; + int len = *lenp; + +#define ADDCIVJ(opt, neg, val, old, maxslotindex, cflag) \ + if (neg) { \ + int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \ + if (len >= vjlen) { \ + PUTCHAR(opt, ucp); \ + PUTCHAR(vjlen, ucp); \ + PUTSHORT(val, ucp); \ + if (!old) { \ + PUTCHAR(maxslotindex, ucp); \ + PUTCHAR(cflag, ucp); \ + } \ + len -= vjlen; \ + } else \ + neg = 0; \ + } + +#define ADDCIADDR(opt, neg, old, val1, val2) \ + if (neg) { \ + int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \ + if (len >= addrlen) { \ + u32_t l; \ + PUTCHAR(opt, ucp); \ + PUTCHAR(addrlen, ucp); \ + l = ntohl(val1); \ + PUTLONG(l, ucp); \ + if (old) { \ + l = ntohl(val2); \ + PUTLONG(l, ucp); \ + } \ + len -= addrlen; \ + } else \ + neg = 0; \ + } + +#define ADDCIDNS(opt, neg, addr) \ + if (neg) { \ + if (len >= CILEN_ADDR) { \ + u32_t l; \ + PUTCHAR(opt, ucp); \ + PUTCHAR(CILEN_ADDR, ucp); \ + l = ntohl(addr); \ + PUTLONG(l, ucp); \ + len -= CILEN_ADDR; \ + } else \ + neg = 0; \ + } + + ADDCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr, + go->old_addrs, go->ouraddr, go->hisaddr); + + ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj, + go->maxslotindex, go->cflag); + + ADDCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]); + + ADDCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]); + + *lenp -= len; +} + + +/* + * ipcp_ackci - Ack our CIs. + * + * Returns: + * 0 - Ack was bad. + * 1 - Ack was good. + */ +static int ipcp_ackci(fsm *f, u_char *p, int len) +{ + ipcp_options *go = &ipcp_gotoptions[f->unit]; + u_short cilen, citype, cishort; + u32_t cilong; + u_char cimaxslotindex, cicflag; + + /* + * CIs must be in exactly the same order that we sent... + * Check packet length and CI length at each step. + * If we find any deviations, then this packet is bad. + */ + +#define ACKCIVJ(opt, neg, val, old, maxslotindex, cflag) \ + if (neg) { \ + int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \ + if ((len -= vjlen) < 0) \ + goto bad; \ + GETCHAR(citype, p); \ + GETCHAR(cilen, p); \ + if (cilen != vjlen || \ + citype != opt) \ + goto bad; \ + GETSHORT(cishort, p); \ + if (cishort != val) \ + goto bad; \ + if (!old) { \ + GETCHAR(cimaxslotindex, p); \ + if (cimaxslotindex != maxslotindex) \ + goto bad; \ + GETCHAR(cicflag, p); \ + if (cicflag != cflag) \ + goto bad; \ + } \ + } + +#define ACKCIADDR(opt, neg, old, val1, val2) \ + if (neg) { \ + int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \ + u32_t l; \ + if ((len -= addrlen) < 0) \ + goto bad; \ + GETCHAR(citype, p); \ + GETCHAR(cilen, p); \ + if (cilen != addrlen || \ + citype != opt) \ + goto bad; \ + GETLONG(l, p); \ + cilong = htonl(l); \ + if (val1 != cilong) \ + goto bad; \ + if (old) { \ + GETLONG(l, p); \ + cilong = htonl(l); \ + if (val2 != cilong) \ + goto bad; \ + } \ + } + +#define ACKCIDNS(opt, neg, addr) \ + if (neg) { \ + u32_t l; \ + if ((len -= CILEN_ADDR) < 0) \ + goto bad; \ + GETCHAR(citype, p); \ + GETCHAR(cilen, p); \ + if (cilen != CILEN_ADDR || \ + citype != opt) \ + goto bad; \ + GETLONG(l, p); \ + cilong = htonl(l); \ + if (addr != cilong) \ + goto bad; \ + } + + ACKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr, + go->old_addrs, go->ouraddr, go->hisaddr); + + ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj, + go->maxslotindex, go->cflag); + + ACKCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]); + + ACKCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]); + + /* + * If there are any remaining CIs, then this packet is bad. + */ + if (len != 0) + goto bad; + return (1); + +bad: + IPCPDEBUG((LOG_INFO, "ipcp_ackci: received bad Ack!\n")); + return (0); +} + +/* + * ipcp_nakci - Peer has sent a NAK for some of our CIs. + * This should not modify any state if the Nak is bad + * or if IPCP is in the OPENED state. + * + * Returns: + * 0 - Nak was bad. + * 1 - Nak was good. + */ +static int ipcp_nakci(fsm *f, u_char *p, int len) +{ + ipcp_options *go = &ipcp_gotoptions[f->unit]; + u_char cimaxslotindex, cicflag; + u_char citype, cilen, *next; + u_short cishort; + u32_t ciaddr1, ciaddr2, l, cidnsaddr; + ipcp_options no; /* options we've seen Naks for */ + ipcp_options try; /* options to request next time */ + + BZERO(&no, sizeof(no)); + try = *go; + + /* + * Any Nak'd CIs must be in exactly the same order that we sent. + * Check packet length and CI length at each step. + * If we find any deviations, then this packet is bad. + */ +#define NAKCIADDR(opt, neg, old, code) \ + if (go->neg && \ + len >= (cilen = (old? CILEN_ADDRS: CILEN_ADDR)) && \ + p[1] == cilen && \ + p[0] == opt) { \ + len -= cilen; \ + INCPTR(2, p); \ + GETLONG(l, p); \ + ciaddr1 = htonl(l); \ + if (old) { \ + GETLONG(l, p); \ + ciaddr2 = htonl(l); \ + no.old_addrs = 1; \ + } else \ + ciaddr2 = 0; \ + no.neg = 1; \ + code \ + } + +#define NAKCIVJ(opt, neg, code) \ + if (go->neg && \ + ((cilen = p[1]) == CILEN_COMPRESS || cilen == CILEN_VJ) && \ + len >= cilen && \ + p[0] == opt) { \ + len -= cilen; \ + INCPTR(2, p); \ + GETSHORT(cishort, p); \ + no.neg = 1; \ + code \ + } + +#define NAKCIDNS(opt, neg, code) \ + if (go->neg && \ + ((cilen = p[1]) == CILEN_ADDR) && \ + len >= cilen && \ + p[0] == opt) { \ + len -= cilen; \ + INCPTR(2, p); \ + GETLONG(l, p); \ + cidnsaddr = htonl(l); \ + no.neg = 1; \ + code \ + } + + /* + * Accept the peer's idea of {our,his} address, if different + * from our idea, only if the accept_{local,remote} flag is set. + */ + NAKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr, go->old_addrs, + if (go->accept_local && ciaddr1) { /* Do we know our address? */ + try.ouraddr = ciaddr1; + IPCPDEBUG((LOG_INFO, "local IP address %s\n", + inet_ntoa(ciaddr1))); + } + if (go->accept_remote && ciaddr2) { /* Does he know his? */ + try.hisaddr = ciaddr2; + IPCPDEBUG((LOG_INFO, "remote IP address %s\n", + inet_ntoa(ciaddr2))); + } + ); + + /* + * Accept the peer's value of maxslotindex provided that it + * is less than what we asked for. Turn off slot-ID compression + * if the peer wants. Send old-style compress-type option if + * the peer wants. + */ + NAKCIVJ(CI_COMPRESSTYPE, neg_vj, + if (cilen == CILEN_VJ) { + GETCHAR(cimaxslotindex, p); + GETCHAR(cicflag, p); + if (cishort == IPCP_VJ_COMP) { + try.old_vj = 0; + if (cimaxslotindex < go->maxslotindex) + try.maxslotindex = cimaxslotindex; + if (!cicflag) + try.cflag = 0; + } else { + try.neg_vj = 0; + } + } else { + if (cishort == IPCP_VJ_COMP || cishort == IPCP_VJ_COMP_OLD) { + try.old_vj = 1; + try.vj_protocol = cishort; + } else { + try.neg_vj = 0; + } + } + ); + + NAKCIDNS(CI_MS_DNS1, req_dns1, + try.dnsaddr[0] = cidnsaddr; + IPCPDEBUG((LOG_INFO, "primary DNS address %s\n", inet_ntoa(cidnsaddr))); + ); + + NAKCIDNS(CI_MS_DNS2, req_dns2, + try.dnsaddr[1] = cidnsaddr; + IPCPDEBUG((LOG_INFO, "secondary DNS address %s\n", inet_ntoa(cidnsaddr))); + ); + + /* + * There may be remaining CIs, if the peer is requesting negotiation + * on an option that we didn't include in our request packet. + * If they want to negotiate about IP addresses, we comply. + * If they want us to ask for compression, we refuse. + */ + while (len > CILEN_VOID) { + GETCHAR(citype, p); + GETCHAR(cilen, p); + if( (len -= cilen) < 0 ) + goto bad; + next = p + cilen - 2; + + switch (citype) { + case CI_COMPRESSTYPE: + if (go->neg_vj || no.neg_vj || + (cilen != CILEN_VJ && cilen != CILEN_COMPRESS)) + goto bad; + no.neg_vj = 1; + break; + case CI_ADDRS: + if ((go->neg_addr && go->old_addrs) || no.old_addrs + || cilen != CILEN_ADDRS) + goto bad; + try.neg_addr = 1; + try.old_addrs = 1; + GETLONG(l, p); + ciaddr1 = htonl(l); + if (ciaddr1 && go->accept_local) + try.ouraddr = ciaddr1; + GETLONG(l, p); + ciaddr2 = htonl(l); + if (ciaddr2 && go->accept_remote) + try.hisaddr = ciaddr2; + no.old_addrs = 1; + break; + case CI_ADDR: + if (go->neg_addr || no.neg_addr || cilen != CILEN_ADDR) + goto bad; + try.old_addrs = 0; + GETLONG(l, p); + ciaddr1 = htonl(l); + if (ciaddr1 && go->accept_local) + try.ouraddr = ciaddr1; + if (try.ouraddr != 0) + try.neg_addr = 1; + no.neg_addr = 1; + break; + } + p = next; + } + + /* If there is still anything left, this packet is bad. */ + if (len != 0) + goto bad; + + /* + * OK, the Nak is good. Now we can update state. + */ + if (f->state != OPENED) + *go = try; + + return 1; + +bad: + IPCPDEBUG((LOG_INFO, "ipcp_nakci: received bad Nak!\n")); + return 0; +} + + +/* + * ipcp_rejci - Reject some of our CIs. + */ +static int ipcp_rejci(fsm *f, u_char *p, int len) +{ + ipcp_options *go = &ipcp_gotoptions[f->unit]; + u_char cimaxslotindex, ciflag, cilen; + u_short cishort; + u32_t cilong; + ipcp_options try; /* options to request next time */ + + try = *go; + /* + * Any Rejected CIs must be in exactly the same order that we sent. + * Check packet length and CI length at each step. + * If we find any deviations, then this packet is bad. + */ +#define REJCIADDR(opt, neg, old, val1, val2) \ + if (go->neg && \ + len >= (cilen = old? CILEN_ADDRS: CILEN_ADDR) && \ + p[1] == cilen && \ + p[0] == opt) { \ + u32_t l; \ + len -= cilen; \ + INCPTR(2, p); \ + GETLONG(l, p); \ + cilong = htonl(l); \ + /* Check rejected value. */ \ + if (cilong != val1) \ + goto bad; \ + if (old) { \ + GETLONG(l, p); \ + cilong = htonl(l); \ + /* Check rejected value. */ \ + if (cilong != val2) \ + goto bad; \ + } \ + try.neg = 0; \ + } + +#define REJCIVJ(opt, neg, val, old, maxslot, cflag) \ + if (go->neg && \ + p[1] == (old? CILEN_COMPRESS : CILEN_VJ) && \ + len >= p[1] && \ + p[0] == opt) { \ + len -= p[1]; \ + INCPTR(2, p); \ + GETSHORT(cishort, p); \ + /* Check rejected value. */ \ + if (cishort != val) \ + goto bad; \ + if (!old) { \ + GETCHAR(cimaxslotindex, p); \ + if (cimaxslotindex != maxslot) \ + goto bad; \ + GETCHAR(ciflag, p); \ + if (ciflag != cflag) \ + goto bad; \ + } \ + try.neg = 0; \ + } + +#define REJCIDNS(opt, neg, dnsaddr) \ + if (go->neg && \ + ((cilen = p[1]) == CILEN_ADDR) && \ + len >= cilen && \ + p[0] == opt) { \ + u32_t l; \ + len -= cilen; \ + INCPTR(2, p); \ + GETLONG(l, p); \ + cilong = htonl(l); \ + /* Check rejected value. */ \ + if (cilong != dnsaddr) \ + goto bad; \ + try.neg = 0; \ + } + + REJCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr, + go->old_addrs, go->ouraddr, go->hisaddr); + + REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol, go->old_vj, + go->maxslotindex, go->cflag); + + REJCIDNS(CI_MS_DNS1, req_dns1, go->dnsaddr[0]); + + REJCIDNS(CI_MS_DNS2, req_dns2, go->dnsaddr[1]); + + /* + * If there are any remaining CIs, then this packet is bad. + */ + if (len != 0) + goto bad; + /* + * Now we can update state. + */ + if (f->state != OPENED) + *go = try; + return 1; + +bad: + IPCPDEBUG((LOG_INFO, "ipcp_rejci: received bad Reject!\n")); + return 0; +} + + +/* + * ipcp_reqci - Check the peer's requested CIs and send appropriate response. + * + * Returns: CONFACK, CONFNAK or CONFREJ and input packet modified + * appropriately. If reject_if_disagree is non-zero, doesn't return + * CONFNAK; returns CONFREJ if it can't return CONFACK. + */ +static int ipcp_reqci( + fsm *f, + u_char *inp, /* Requested CIs */ + int *len, /* Length of requested CIs */ + int reject_if_disagree +) +{ + ipcp_options *wo = &ipcp_wantoptions[f->unit]; + ipcp_options *ho = &ipcp_hisoptions[f->unit]; + ipcp_options *ao = &ipcp_allowoptions[f->unit]; +#ifdef OLD_CI_ADDRS + ipcp_options *go = &ipcp_gotoptions[f->unit]; +#endif + u_char *cip, *next; /* Pointer to current and next CIs */ + u_short cilen, citype; /* Parsed len, type */ + u_short cishort; /* Parsed short value */ + u32_t tl, ciaddr1; /* Parsed address values */ +#ifdef OLD_CI_ADDRS + u32_t ciaddr2; /* Parsed address values */ +#endif + int rc = CONFACK; /* Final packet return code */ + int orc; /* Individual option return code */ + u_char *p; /* Pointer to next char to parse */ + u_char *ucp = inp; /* Pointer to current output char */ + int l = *len; /* Length left */ + u_char maxslotindex, cflag; + int d; + + cis_received[f->unit] = 1; + + /* + * Reset all his options. + */ + BZERO(ho, sizeof(*ho)); + + /* + * Process all his options. + */ + next = inp; + while (l) { + orc = CONFACK; /* Assume success */ + cip = p = next; /* Remember begining of CI */ + if (l < 2 || /* Not enough data for CI header or */ + p[1] < 2 || /* CI length too small or */ + p[1] > l) { /* CI length too big? */ + IPCPDEBUG((LOG_INFO, "ipcp_reqci: bad CI length!\n")); + orc = CONFREJ; /* Reject bad CI */ + cilen = l; /* Reject till end of packet */ + l = 0; /* Don't loop again */ + goto endswitch; + } + GETCHAR(citype, p); /* Parse CI type */ + GETCHAR(cilen, p); /* Parse CI length */ + l -= cilen; /* Adjust remaining length */ + next += cilen; /* Step to next CI */ + + switch (citype) { /* Check CI type */ +#ifdef OLD_CI_ADDRS /* Need to save space... */ + case CI_ADDRS: + IPCPDEBUG((LOG_INFO, "ipcp_reqci: received ADDRS\n")); + if (!ao->neg_addr || + cilen != CILEN_ADDRS) { /* Check CI length */ + orc = CONFREJ; /* Reject CI */ + break; + } + + /* + * If he has no address, or if we both have his address but + * disagree about it, then NAK it with our idea. + * In particular, if we don't know his address, but he does, + * then accept it. + */ + GETLONG(tl, p); /* Parse source address (his) */ + ciaddr1 = htonl(tl); + IPCPDEBUG((LOG_INFO, "his addr %s\n", inet_ntoa(ciaddr1))); + if (ciaddr1 != wo->hisaddr + && (ciaddr1 == 0 || !wo->accept_remote)) { + orc = CONFNAK; + if (!reject_if_disagree) { + DECPTR(sizeof(u32_t), p); + tl = ntohl(wo->hisaddr); + PUTLONG(tl, p); + } + } else if (ciaddr1 == 0 && wo->hisaddr == 0) { + /* + * If neither we nor he knows his address, reject the option. + */ + orc = CONFREJ; + wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */ + break; + } + + /* + * If he doesn't know our address, or if we both have our address + * but disagree about it, then NAK it with our idea. + */ + GETLONG(tl, p); /* Parse desination address (ours) */ + ciaddr2 = htonl(tl); + IPCPDEBUG((LOG_INFO, "our addr %s\n", inet_ntoa(ciaddr2))); + if (ciaddr2 != wo->ouraddr) { + if (ciaddr2 == 0 || !wo->accept_local) { + orc = CONFNAK; + if (!reject_if_disagree) { + DECPTR(sizeof(u32_t), p); + tl = ntohl(wo->ouraddr); + PUTLONG(tl, p); + } + } else { + go->ouraddr = ciaddr2; /* accept peer's idea */ + } + } + + ho->neg_addr = 1; + ho->old_addrs = 1; + ho->hisaddr = ciaddr1; + ho->ouraddr = ciaddr2; + break; +#endif + + case CI_ADDR: + if (!ao->neg_addr) { + IPCPDEBUG((LOG_INFO, "ipcp_reqci: Reject ADDR not allowed\n")); + orc = CONFREJ; /* Reject CI */ + break; + } else if (cilen != CILEN_ADDR) { /* Check CI length */ + IPCPDEBUG((LOG_INFO, "ipcp_reqci: Reject ADDR bad len\n")); + orc = CONFREJ; /* Reject CI */ + break; + } + + /* + * If he has no address, or if we both have his address but + * disagree about it, then NAK it with our idea. + * In particular, if we don't know his address, but he does, + * then accept it. + */ + GETLONG(tl, p); /* Parse source address (his) */ + ciaddr1 = htonl(tl); + if (ciaddr1 != wo->hisaddr + && (ciaddr1 == 0 || !wo->accept_remote)) { + orc = CONFNAK; + if (!reject_if_disagree) { + DECPTR(sizeof(u32_t), p); + tl = ntohl(wo->hisaddr); + PUTLONG(tl, p); + } + IPCPDEBUG((LOG_INFO, "ipcp_reqci: Nak ADDR %s\n", inet_ntoa(ciaddr1))); + } else if (ciaddr1 == 0 && wo->hisaddr == 0) { + /* + * Don't ACK an address of 0.0.0.0 - reject it instead. + */ + IPCPDEBUG((LOG_INFO, "ipcp_reqci: Reject ADDR %s\n", inet_ntoa(ciaddr1))); + orc = CONFREJ; + wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */ + break; + } + + ho->neg_addr = 1; + ho->hisaddr = ciaddr1; + IPCPDEBUG((LOG_INFO, "ipcp_reqci: ADDR %s\n", inet_ntoa(ciaddr1))); + break; + + case CI_MS_DNS1: + case CI_MS_DNS2: + /* Microsoft primary or secondary DNS request */ + d = citype == CI_MS_DNS2; + + /* If we do not have a DNS address then we cannot send it */ + if (ao->dnsaddr[d] == 0 || + cilen != CILEN_ADDR) { /* Check CI length */ + IPCPDEBUG((LOG_INFO, "ipcp_reqci: Rejecting DNS%d Request\n", d+1)); + orc = CONFREJ; /* Reject CI */ + break; + } + GETLONG(tl, p); + if (htonl(tl) != ao->dnsaddr[d]) { + IPCPDEBUG((LOG_INFO, "ipcp_reqci: Naking DNS%d Request %d\n", + d+1, inet_ntoa(tl))); + DECPTR(sizeof(u32_t), p); + tl = ntohl(ao->dnsaddr[d]); + PUTLONG(tl, p); + orc = CONFNAK; + } + IPCPDEBUG((LOG_INFO, "ipcp_reqci: received DNS%d Request\n", d+1)); + break; + + case CI_MS_WINS1: + case CI_MS_WINS2: + /* Microsoft primary or secondary WINS request */ + d = citype == CI_MS_WINS2; + IPCPDEBUG((LOG_INFO, "ipcp_reqci: received WINS%d Request\n", d+1)); + + /* If we do not have a DNS address then we cannot send it */ + if (ao->winsaddr[d] == 0 || + cilen != CILEN_ADDR) { /* Check CI length */ + orc = CONFREJ; /* Reject CI */ + break; + } + GETLONG(tl, p); + if (htonl(tl) != ao->winsaddr[d]) { + DECPTR(sizeof(u32_t), p); + tl = ntohl(ao->winsaddr[d]); + PUTLONG(tl, p); + orc = CONFNAK; + } + break; + + case CI_COMPRESSTYPE: + if (!ao->neg_vj) { + IPCPDEBUG((LOG_INFO, "ipcp_reqci: Rejecting COMPRESSTYPE not allowed\n")); + orc = CONFREJ; + break; + } else if (cilen != CILEN_VJ && cilen != CILEN_COMPRESS) { + IPCPDEBUG((LOG_INFO, "ipcp_reqci: Rejecting COMPRESSTYPE len=%d\n", cilen)); + orc = CONFREJ; + break; + } + GETSHORT(cishort, p); + + if (!(cishort == IPCP_VJ_COMP || + (cishort == IPCP_VJ_COMP_OLD && cilen == CILEN_COMPRESS))) { + IPCPDEBUG((LOG_INFO, "ipcp_reqci: Rejecting COMPRESSTYPE %d\n", cishort)); + orc = CONFREJ; + break; + } + + ho->neg_vj = 1; + ho->vj_protocol = cishort; + if (cilen == CILEN_VJ) { + GETCHAR(maxslotindex, p); + if (maxslotindex > ao->maxslotindex) { + IPCPDEBUG((LOG_INFO, "ipcp_reqci: Naking VJ max slot %d\n", maxslotindex)); + orc = CONFNAK; + if (!reject_if_disagree){ + DECPTR(1, p); + PUTCHAR(ao->maxslotindex, p); + } + } + GETCHAR(cflag, p); + if (cflag && !ao->cflag) { + IPCPDEBUG((LOG_INFO, "ipcp_reqci: Naking VJ cflag %d\n", cflag)); + orc = CONFNAK; + if (!reject_if_disagree){ + DECPTR(1, p); + PUTCHAR(wo->cflag, p); + } + } + ho->maxslotindex = maxslotindex; + ho->cflag = cflag; + } else { + ho->old_vj = 1; + ho->maxslotindex = MAX_SLOTS - 1; + ho->cflag = 1; + } + IPCPDEBUG((LOG_INFO, + "ipcp_reqci: received COMPRESSTYPE p=%d old=%d maxslot=%d cflag=%d\n", + ho->vj_protocol, ho->old_vj, ho->maxslotindex, ho->cflag)); + break; + + default: + IPCPDEBUG((LOG_INFO, "ipcp_reqci: Rejecting unknown CI type %d\n", citype)); + orc = CONFREJ; + break; + } + +endswitch: + if (orc == CONFACK && /* Good CI */ + rc != CONFACK) /* but prior CI wasnt? */ + continue; /* Don't send this one */ + + if (orc == CONFNAK) { /* Nak this CI? */ + if (reject_if_disagree) { /* Getting fed up with sending NAKs? */ + IPCPDEBUG((LOG_INFO, "ipcp_reqci: Rejecting too many naks\n")); + orc = CONFREJ; /* Get tough if so */ + } else { + if (rc == CONFREJ) /* Rejecting prior CI? */ + continue; /* Don't send this one */ + if (rc == CONFACK) { /* Ack'd all prior CIs? */ + rc = CONFNAK; /* Not anymore... */ + ucp = inp; /* Backup */ + } + } + } + + if (orc == CONFREJ && /* Reject this CI */ + rc != CONFREJ) { /* but no prior ones? */ + rc = CONFREJ; + ucp = inp; /* Backup */ + } + + /* Need to move CI? */ + if (ucp != cip) + BCOPY(cip, ucp, cilen); /* Move it */ + + /* Update output pointer */ + INCPTR(cilen, ucp); + } + + /* + * If we aren't rejecting this packet, and we want to negotiate + * their address, and they didn't send their address, then we + * send a NAK with a CI_ADDR option appended. We assume the + * input buffer is long enough that we can append the extra + * option safely. + */ + if (rc != CONFREJ && !ho->neg_addr && + wo->req_addr && !reject_if_disagree) { + IPCPDEBUG((LOG_INFO, "ipcp_reqci: Requesting peer address\n")); + if (rc == CONFACK) { + rc = CONFNAK; + ucp = inp; /* reset pointer */ + wo->req_addr = 0; /* don't ask again */ + } + PUTCHAR(CI_ADDR, ucp); + PUTCHAR(CILEN_ADDR, ucp); + tl = ntohl(wo->hisaddr); + PUTLONG(tl, ucp); + } + + *len = (int)(ucp - inp); /* Compute output length */ + IPCPDEBUG((LOG_INFO, "ipcp_reqci: returning Configure-%s\n", CODENAME(rc))); + return (rc); /* Return final code */ +} + + +#if 0 +/* + * ip_check_options - check that any IP-related options are OK, + * and assign appropriate defaults. + */ +static void ip_check_options(u_long localAddr) +{ + ipcp_options *wo = &ipcp_wantoptions[0]; + + /* + * Load our default IP address but allow the remote host to give us + * a new address. + */ + if (wo->ouraddr == 0 && !ppp_settings.disable_defaultip) { + wo->accept_local = 1; /* don't insist on this default value */ + wo->ouraddr = htonl(localAddr); + } +} +#endif + + +/* + * ipcp_up - IPCP has come UP. + * + * Configure the IP network interface appropriately and bring it up. + */ +static void ipcp_up(fsm *f) +{ + u32_t mask; + ipcp_options *ho = &ipcp_hisoptions[f->unit]; + ipcp_options *go = &ipcp_gotoptions[f->unit]; + ipcp_options *wo = &ipcp_wantoptions[f->unit]; + + np_up(f->unit, PPP_IP); + IPCPDEBUG((LOG_INFO, "ipcp: up\n")); + + /* + * We must have a non-zero IP address for both ends of the link. + */ + if (!ho->neg_addr) + ho->hisaddr = wo->hisaddr; + + if (ho->hisaddr == 0) { + IPCPDEBUG((LOG_ERR, "Could not determine remote IP address\n")); + ipcp_close(f->unit, "Could not determine remote IP address"); + return; + } + if (go->ouraddr == 0) { + IPCPDEBUG((LOG_ERR, "Could not determine local IP address\n")); + ipcp_close(f->unit, "Could not determine local IP address"); + return; + } + + if (ppp_settings.usepeerdns && (go->dnsaddr[0] || go->dnsaddr[1])) { + /*pppGotDNSAddrs(go->dnsaddr[0], go->dnsaddr[1]);*/ + } + + /* + * Check that the peer is allowed to use the IP address it wants. + */ + if (!auth_ip_addr(f->unit, ho->hisaddr)) { + IPCPDEBUG((LOG_ERR, "Peer is not authorized to use remote address %s\n", + inet_ntoa(ho->hisaddr))); + ipcp_close(f->unit, "Unauthorized remote IP address"); + return; + } + + /* set tcp compression */ + sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex); + + /* + * Set IP addresses and (if specified) netmask. + */ + mask = GetMask(go->ouraddr); + + if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask, go->dnsaddr[0], go->dnsaddr[1])) { + IPCPDEBUG((LOG_WARNING, "sifaddr failed\n")); + ipcp_close(f->unit, "Interface configuration failed"); + return; + } + + /* bring the interface up for IP */ + if (!sifup(f->unit)) { + IPCPDEBUG((LOG_WARNING, "sifup failed\n")); + ipcp_close(f->unit, "Interface configuration failed"); + return; + } + + sifnpmode(f->unit, PPP_IP, NPMODE_PASS); + + /* assign a default route through the interface if required */ + if (ipcp_wantoptions[f->unit].default_route) + if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr)) + default_route_set[f->unit] = 1; + + IPCPDEBUG((LOG_NOTICE, "local IP address %s\n", inet_ntoa(go->ouraddr))); + IPCPDEBUG((LOG_NOTICE, "remote IP address %s\n", inet_ntoa(ho->hisaddr))); + if (go->dnsaddr[0]) { + IPCPDEBUG((LOG_NOTICE, "primary DNS address %s\n", inet_ntoa(go->dnsaddr[0]))); + } + if (go->dnsaddr[1]) { + IPCPDEBUG((LOG_NOTICE, "secondary DNS address %s\n", inet_ntoa(go->dnsaddr[1]))); + } +} + + +/* + * ipcp_down - IPCP has gone DOWN. + * + * Take the IP network interface down, clear its addresses + * and delete routes through it. + */ +static void ipcp_down(fsm *f) +{ + IPCPDEBUG((LOG_INFO, "ipcp: down\n")); + np_down(f->unit, PPP_IP); + sifvjcomp(f->unit, 0, 0, 0); + + sifdown(f->unit); + ipcp_clear_addrs(f->unit); +} + + +/* + * ipcp_clear_addrs() - clear the interface addresses, routes, etc. + */ +static void ipcp_clear_addrs(int unit) +{ + u32_t ouraddr, hisaddr; + + ouraddr = ipcp_gotoptions[unit].ouraddr; + hisaddr = ipcp_hisoptions[unit].hisaddr; + if (default_route_set[unit]) { + cifdefaultroute(unit, ouraddr, hisaddr); + default_route_set[unit] = 0; + } + cifaddr(unit, ouraddr, hisaddr); +} + + +/* + * ipcp_finished - possibly shut down the lower layers. + */ +static void ipcp_finished(fsm *f) +{ + np_finished(f->unit, PPP_IP); +} + +#if 0 +static int ipcp_printpkt( + u_char *p, + int plen, + void (*printer) (void *, char *, ...), + void *arg +) +{ + (void)p; + (void)plen; + (void)printer; + (void)arg; + return 0; +} + +/* + * ip_active_pkt - see if this IP packet is worth bringing the link up for. + * We don't bring the link up for IP fragments or for TCP FIN packets + * with no data. + */ +#define IP_HDRLEN 20 /* bytes */ +#define IP_OFFMASK 0x1fff +#define IPPROTO_TCP 6 +#define TCP_HDRLEN 20 +#define TH_FIN 0x01 + +/* + * We use these macros because the IP header may be at an odd address, + * and some compilers might use word loads to get th_off or ip_hl. + */ + +#define net_short(x) (((x)[0] << 8) + (x)[1]) +#define get_iphl(x) (((unsigned char *)(x))[0] & 0xF) +#define get_ipoff(x) net_short((unsigned char *)(x) + 6) +#define get_ipproto(x) (((unsigned char *)(x))[9]) +#define get_tcpoff(x) (((unsigned char *)(x))[12] >> 4) +#define get_tcpflags(x) (((unsigned char *)(x))[13]) + +static int ip_active_pkt(u_char *pkt, int len) +{ + u_char *tcp; + int hlen; + + len -= PPP_HDRLEN; + pkt += PPP_HDRLEN; + if (len < IP_HDRLEN) + return 0; + if ((get_ipoff(pkt) & IP_OFFMASK) != 0) + return 0; + if (get_ipproto(pkt) != IPPROTO_TCP) + return 1; + hlen = get_iphl(pkt) * 4; + if (len < hlen + TCP_HDRLEN) + return 0; + tcp = pkt + hlen; + if ((get_tcpflags(tcp) & TH_FIN) != 0 && len == hlen + get_tcpoff(tcp) * 4) + return 0; + return 1; +} +#endif + +#endif /* PPP_SUPPORT */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/ipcp.h @@ -0,0 +1,126 @@ +/***************************************************************************** +* ipcp.h - PPP IP NCP: Internet Protocol Network Control Protocol header file. +* +* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. +* portions Copyright (c) 1997 Global Election Systems Inc. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY +* +* 03-01-01 Marc Boucher <marc@mbsi.ca> +* Ported to lwIP. +* 97-12-04 Guy Lancaster <glanca@gesn.com>, Global Election Systems Inc. +* Original derived from BSD codes. +*****************************************************************************/ +/* + * ipcp.h - IP Control Protocol definitions. + * + * Copyright (c) 1989 Carnegie Mellon University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Carnegie Mellon University. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * $Id: ipcp.h,v 1.1 2004/05/04 12:32:33 jani Exp $ + */ + +#ifndef IPCP_H +#define IPCP_H + +/************************* +*** PUBLIC DEFINITIONS *** +*************************/ +/* + * Options. + */ +#define CI_ADDRS 1 /* IP Addresses */ +#define CI_COMPRESSTYPE 2 /* Compression Type */ +#define CI_ADDR 3 + +#define CI_MS_WINS1 128 /* Primary WINS value */ +#define CI_MS_DNS1 129 /* Primary DNS value */ +#define CI_MS_WINS2 130 /* Secondary WINS value */ +#define CI_MS_DNS2 131 /* Secondary DNS value */ + +#define IPCP_VJMODE_OLD 1 /* "old" mode (option # = 0x0037) */ +#define IPCP_VJMODE_RFC1172 2 /* "old-rfc"mode (option # = 0x002d) */ +#define IPCP_VJMODE_RFC1332 3 /* "new-rfc"mode (option # = 0x002d, */ + /* maxslot and slot number compression) */ + +#define IPCP_VJ_COMP 0x002d /* current value for VJ compression option*/ +#define IPCP_VJ_COMP_OLD 0x0037 /* "old" (i.e, broken) value for VJ */ + /* compression option*/ + + +/************************ +*** PUBLIC DATA TYPES *** +************************/ + +typedef struct ipcp_options { + u_int neg_addr : 1; /* Negotiate IP Address? */ + u_int old_addrs : 1; /* Use old (IP-Addresses) option? */ + u_int req_addr : 1; /* Ask peer to send IP address? */ + u_int default_route : 1; /* Assign default route through interface? */ + u_int proxy_arp : 1; /* Make proxy ARP entry for peer? */ + u_int neg_vj : 1; /* Van Jacobson Compression? */ + u_int old_vj : 1; /* use old (short) form of VJ option? */ + u_int accept_local : 1; /* accept peer's value for ouraddr */ + u_int accept_remote : 1; /* accept peer's value for hisaddr */ + u_int req_dns1 : 1; /* Ask peer to send primary DNS address? */ + u_int req_dns2 : 1; /* Ask peer to send secondary DNS address? */ + u_short vj_protocol; /* protocol value to use in VJ option */ + u_char maxslotindex; /* VJ slots - 1. */ + u_char cflag; /* VJ slot compression flag. */ + u32_t ouraddr, hisaddr; /* Addresses in NETWORK BYTE ORDER */ + u32_t dnsaddr[2]; /* Primary and secondary MS DNS entries */ + u32_t winsaddr[2]; /* Primary and secondary MS WINS entries */ +} ipcp_options; + + +/***************************** +*** PUBLIC DATA STRUCTURES *** +*****************************/ + +extern fsm ipcp_fsm[]; +extern ipcp_options ipcp_wantoptions[]; +extern ipcp_options ipcp_gotoptions[]; +extern ipcp_options ipcp_allowoptions[]; +extern ipcp_options ipcp_hisoptions[]; + +extern struct protent ipcp_protent; + + +/*********************** +*** PUBLIC FUNCTIONS *** +***********************/ + + +#endif /* IPCP_H */ +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/lcp.c @@ -0,0 +1,1988 @@ +/***************************************************************************** +* lcp.c - Network Link Control Protocol program file. +* +* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. +* portions Copyright (c) 1997 by Global Election Systems Inc. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY +* +* 03-01-01 Marc Boucher <marc@mbsi.ca> +* Ported to lwIP. +* 97-12-01 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc. +* Original. +*****************************************************************************/ + +/* + * lcp.c - PPP Link Control Protocol. + * + * Copyright (c) 1989 Carnegie Mellon University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Carnegie Mellon University. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ +#include "ppp.h" +#if PPP_SUPPORT > 0 +#include "fsm.h" +#include "chap.h" +#include "magic.h" +#include "auth.h" +#include "lcp.h" +#include "pppdebug.h" + + +/*************************/ +/*** LOCAL DEFINITIONS ***/ +/*************************/ +/* + * Length of each type of configuration option (in octets) + */ +#define CILEN_VOID 2 +#define CILEN_CHAR 3 +#define CILEN_SHORT 4 /* CILEN_VOID + sizeof(short) */ +#define CILEN_CHAP 5 /* CILEN_VOID + sizeof(short) + 1 */ +#define CILEN_LONG 6 /* CILEN_VOID + sizeof(long) */ +#define CILEN_LQR 8 /* CILEN_VOID + sizeof(short) + sizeof(long) */ +#define CILEN_CBCP 3 + + +/***********************************/ +/*** LOCAL FUNCTION DECLARATIONS ***/ +/***********************************/ +/* + * Callbacks for fsm code. (CI = Configuration Information) + */ +static void lcp_resetci (fsm*); /* Reset our CI */ +static int lcp_cilen (fsm*); /* Return length of our CI */ +static void lcp_addci (fsm*, u_char*, int*); /* Add our CI to pkt */ +static int lcp_ackci (fsm*, u_char*, int);/* Peer ack'd our CI */ +static int lcp_nakci (fsm*, u_char*, int);/* Peer nak'd our CI */ +static int lcp_rejci (fsm*, u_char*, int);/* Peer rej'd our CI */ +static int lcp_reqci (fsm*, u_char*, int*, int); /* Rcv peer CI */ +static void lcp_up (fsm*); /* We're UP */ +static void lcp_down (fsm*); /* We're DOWN */ +static void lcp_starting (fsm*); /* We need lower layer up */ +static void lcp_finished (fsm*); /* We need lower layer down */ +static int lcp_extcode (fsm*, int, u_char, u_char*, int); + +static void lcp_rprotrej (fsm*, u_char*, int); + +/* + * routines to send LCP echos to peer + */ +static void lcp_echo_lowerup (int); +static void lcp_echo_lowerdown (int); +static void LcpEchoTimeout (void*); +static void lcp_received_echo_reply (fsm*, int, u_char*, int); +static void LcpSendEchoRequest (fsm*); +static void LcpLinkFailure (fsm*); +static void LcpEchoCheck (fsm*); + +/* + * Protocol entry points. + * Some of these are called directly. + */ +static void lcp_input (int, u_char *, int); +static void lcp_protrej (int); + +#define CODENAME(x) ((x) == CONFACK ? "ACK" : \ + (x) == CONFNAK ? "NAK" : "REJ") + + +/******************************/ +/*** PUBLIC DATA STRUCTURES ***/ +/******************************/ +/* global vars */ +LinkPhase lcp_phase[NUM_PPP]; /* Phase of link session (RFC 1661) */ +lcp_options lcp_wantoptions[NUM_PPP]; /* Options that we want to request */ +lcp_options lcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */ +lcp_options lcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */ +lcp_options lcp_hisoptions[NUM_PPP]; /* Options that we ack'd */ +ext_accm xmit_accm[NUM_PPP]; /* extended transmit ACCM */ + + + +/*****************************/ +/*** LOCAL DATA STRUCTURES ***/ +/*****************************/ +static fsm lcp_fsm[NUM_PPP]; /* LCP fsm structure (global)*/ +static u_int lcp_echo_interval = LCP_ECHOINTERVAL; /* Interval between LCP echo-requests */ +static u_int lcp_echo_fails = LCP_MAXECHOFAILS; /* Tolerance to unanswered echo-requests */ +static u32_t lcp_echos_pending = 0; /* Number of outstanding echo msgs */ +static u32_t lcp_echo_number = 0; /* ID number of next echo frame */ +static u32_t lcp_echo_timer_running = 0; /* TRUE if a timer is running */ + +static u_char nak_buffer[PPP_MRU]; /* where we construct a nak packet */ + +static fsm_callbacks lcp_callbacks = { /* LCP callback routines */ + lcp_resetci, /* Reset our Configuration Information */ + lcp_cilen, /* Length of our Configuration Information */ + lcp_addci, /* Add our Configuration Information */ + lcp_ackci, /* ACK our Configuration Information */ + lcp_nakci, /* NAK our Configuration Information */ + lcp_rejci, /* Reject our Configuration Information */ + lcp_reqci, /* Request peer's Configuration Information */ + lcp_up, /* Called when fsm reaches OPENED state */ + lcp_down, /* Called when fsm leaves OPENED state */ + lcp_starting, /* Called when we want the lower layer up */ + lcp_finished, /* Called when we want the lower layer down */ + NULL, /* Called when Protocol-Reject received */ + NULL, /* Retransmission is necessary */ + lcp_extcode, /* Called to handle LCP-specific codes */ + "LCP" /* String name of protocol */ +}; + +struct protent lcp_protent = { + PPP_LCP, + lcp_init, + lcp_input, + lcp_protrej, + lcp_lowerup, + lcp_lowerdown, + lcp_open, + lcp_close, +#if 0 + lcp_printpkt, + NULL, +#endif + 1, + "LCP", +#if 0 + NULL, + NULL, + NULL +#endif +}; + +int lcp_loopbackfail = DEFLOOPBACKFAIL; + + + +/***********************************/ +/*** PUBLIC FUNCTION DEFINITIONS ***/ +/***********************************/ +/* + * lcp_init - Initialize LCP. + */ +void lcp_init(int unit) +{ + fsm *f = &lcp_fsm[unit]; + lcp_options *wo = &lcp_wantoptions[unit]; + lcp_options *ao = &lcp_allowoptions[unit]; + + f->unit = unit; + f->protocol = PPP_LCP; + f->callbacks = &lcp_callbacks; + + fsm_init(f); + + wo->passive = 0; + wo->silent = 0; + wo->restart = 0; /* Set to 1 in kernels or multi-line + * implementations */ + wo->neg_mru = 1; + wo->mru = PPP_DEFMRU; + wo->neg_asyncmap = 1; + wo->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */ + wo->neg_chap = 0; /* Set to 1 on server */ + wo->neg_upap = 0; /* Set to 1 on server */ + wo->chap_mdtype = CHAP_DIGEST_MD5; + wo->neg_magicnumber = 1; + wo->neg_pcompression = 1; + wo->neg_accompression = 1; + wo->neg_lqr = 0; /* no LQR implementation yet */ + wo->neg_cbcp = 0; + + ao->neg_mru = 1; + ao->mru = PPP_MAXMRU; + ao->neg_asyncmap = 1; + ao->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */ + ao->neg_chap = (CHAP_SUPPORT != 0); + ao->chap_mdtype = CHAP_DIGEST_MD5; + ao->neg_upap = (PAP_SUPPORT != 0); + ao->neg_magicnumber = 1; + ao->neg_pcompression = 1; + ao->neg_accompression = 1; + ao->neg_lqr = 0; /* no LQR implementation yet */ + ao->neg_cbcp = (CBCP_SUPPORT != 0); + + /* + * Set transmit escape for the flag and escape characters plus anything + * set for the allowable options. + */ + memset(xmit_accm[unit], 0, sizeof(xmit_accm[0])); + xmit_accm[unit][15] = 0x60; + xmit_accm[unit][0] = (u_char)(ao->asyncmap & 0xFF); + xmit_accm[unit][1] = (u_char)((ao->asyncmap >> 8) & 0xFF); + xmit_accm[unit][2] = (u_char)((ao->asyncmap >> 16) & 0xFF); + xmit_accm[unit][3] = (u_char)((ao->asyncmap >> 24) & 0xFF); + LCPDEBUG((LOG_INFO, "lcp_init: xmit_accm=%X %X %X %X\n", + xmit_accm[unit][0], + xmit_accm[unit][1], + xmit_accm[unit][2], + xmit_accm[unit][3])); + + lcp_phase[unit] = PHASE_INITIALIZE; +} + + +/* + * lcp_open - LCP is allowed to come up. + */ +void lcp_open(int unit) +{ + fsm *f = &lcp_fsm[unit]; + lcp_options *wo = &lcp_wantoptions[unit]; + + f->flags = 0; + if (wo->passive) + f->flags |= OPT_PASSIVE; + if (wo->silent) + f->flags |= OPT_SILENT; + fsm_open(f); + + lcp_phase[unit] = PHASE_ESTABLISH; +} + + +/* + * lcp_close - Take LCP down. + */ +void lcp_close(int unit, char *reason) +{ + fsm *f = &lcp_fsm[unit]; + + if (lcp_phase[unit] != PHASE_DEAD) + lcp_phase[unit] = PHASE_TERMINATE; + if (f->state == STOPPED && f->flags & (OPT_PASSIVE|OPT_SILENT)) { + /* + * This action is not strictly according to the FSM in RFC1548, + * but it does mean that the program terminates if you do an + * lcp_close() in passive/silent mode when a connection hasn't + * been established. + */ + f->state = CLOSED; + lcp_finished(f); + } + else + fsm_close(&lcp_fsm[unit], reason); +} + + +/* + * lcp_lowerup - The lower layer is up. + */ +void lcp_lowerup(int unit) +{ + lcp_options *wo = &lcp_wantoptions[unit]; + + /* + * Don't use A/C or protocol compression on transmission, + * but accept A/C and protocol compressed packets + * if we are going to ask for A/C and protocol compression. + */ + ppp_set_xaccm(unit, &xmit_accm[unit]); + ppp_send_config(unit, PPP_MRU, 0xffffffffl, 0, 0); + ppp_recv_config(unit, PPP_MRU, 0x00000000l, + wo->neg_pcompression, wo->neg_accompression); + peer_mru[unit] = PPP_MRU; + lcp_allowoptions[unit].asyncmap + = (u_long)xmit_accm[unit][0] + | ((u_long)xmit_accm[unit][1] << 8) + | ((u_long)xmit_accm[unit][2] << 16) + | ((u_long)xmit_accm[unit][3] << 24); + LCPDEBUG((LOG_INFO, "lcp_lowerup: asyncmap=%X %X %X %X\n", + xmit_accm[unit][3], + xmit_accm[unit][2], + xmit_accm[unit][1], + xmit_accm[unit][0])); + + fsm_lowerup(&lcp_fsm[unit]); +} + + +/* + * lcp_lowerdown - The lower layer is down. + */ +void lcp_lowerdown(int unit) +{ + fsm_lowerdown(&lcp_fsm[unit]); +} + +/* + * lcp_sprotrej - Send a Protocol-Reject for some protocol. + */ +void lcp_sprotrej(int unit, u_char *p, int len) +{ + /* + * Send back the protocol and the information field of the + * rejected packet. We only get here if LCP is in the OPENED state. + */ + + fsm_sdata(&lcp_fsm[unit], PROTREJ, ++lcp_fsm[unit].id, + p, len); +} + + + +/**********************************/ +/*** LOCAL FUNCTION DEFINITIONS ***/ +/**********************************/ +/* + * lcp_input - Input LCP packet. + */ +static void lcp_input(int unit, u_char *p, int len) +{ + fsm *f = &lcp_fsm[unit]; + + fsm_input(f, p, len); +} + + +/* + * lcp_extcode - Handle a LCP-specific code. + */ +static int lcp_extcode(fsm *f, int code, u_char id, u_char *inp, int len) +{ + u_char *magp; + + switch( code ){ + case PROTREJ: + lcp_rprotrej(f, inp, len); + break; + + case ECHOREQ: + if (f->state != OPENED) + break; + LCPDEBUG((LOG_INFO, "lcp: Echo-Request, Rcvd id %d\n", id)); + magp = inp; + PUTLONG(lcp_gotoptions[f->unit].magicnumber, magp); + fsm_sdata(f, ECHOREP, id, inp, len); + break; + + case ECHOREP: + lcp_received_echo_reply(f, id, inp, len); + break; + + case DISCREQ: + break; + + default: + return 0; + } + return 1; +} + + +/* + * lcp_rprotrej - Receive an Protocol-Reject. + * + * Figure out which protocol is rejected and inform it. + */ +static void lcp_rprotrej(fsm *f, u_char *inp, int len) +{ + int i; + struct protent *protp; + u_short prot; + + if (len < sizeof (u_short)) { + LCPDEBUG((LOG_INFO, + "lcp_rprotrej: Rcvd short Protocol-Reject packet!\n")); + return; + } + + GETSHORT(prot, inp); + + LCPDEBUG((LOG_INFO, + "lcp_rprotrej: Rcvd Protocol-Reject packet for %x!\n", + prot)); + + /* + * Protocol-Reject packets received in any state other than the LCP + * OPENED state SHOULD be silently discarded. + */ + if( f->state != OPENED ){ + LCPDEBUG((LOG_INFO, "Protocol-Reject discarded: LCP in state %d\n", + f->state)); + return; + } + + /* + * Upcall the proper Protocol-Reject routine. + */ + for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) + if (protp->protocol == prot && protp->enabled_flag) { + (*protp->protrej)(f->unit); + return; + } + + LCPDEBUG((LOG_WARNING, "Protocol-Reject for unsupported protocol 0x%x\n", + prot)); +} + + +/* + * lcp_protrej - A Protocol-Reject was received. + */ +static void lcp_protrej(int unit) +{ + (void)unit; + /* + * Can't reject LCP! + */ + LCPDEBUG((LOG_WARNING, + "lcp_protrej: Received Protocol-Reject for LCP!\n")); + fsm_protreject(&lcp_fsm[unit]); +} + + +/* + * lcp_resetci - Reset our CI. + */ +static void lcp_resetci(fsm *f) +{ + lcp_wantoptions[f->unit].magicnumber = magic(); + lcp_wantoptions[f->unit].numloops = 0; + lcp_gotoptions[f->unit] = lcp_wantoptions[f->unit]; + peer_mru[f->unit] = PPP_MRU; + auth_reset(f->unit); +} + + +/* + * lcp_cilen - Return length of our CI. + */ +static int lcp_cilen(fsm *f) +{ + lcp_options *go = &lcp_gotoptions[f->unit]; + +#define LENCIVOID(neg) ((neg) ? CILEN_VOID : 0) +#define LENCICHAP(neg) ((neg) ? CILEN_CHAP : 0) +#define LENCISHORT(neg) ((neg) ? CILEN_SHORT : 0) +#define LENCILONG(neg) ((neg) ? CILEN_LONG : 0) +#define LENCILQR(neg) ((neg) ? CILEN_LQR: 0) +#define LENCICBCP(neg) ((neg) ? CILEN_CBCP: 0) + /* + * NB: we only ask for one of CHAP and UPAP, even if we will + * accept either. + */ + return (LENCISHORT(go->neg_mru && go->mru != PPP_DEFMRU) + + LENCILONG(go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) + + LENCICHAP(go->neg_chap) + + LENCISHORT(!go->neg_chap && go->neg_upap) + + LENCILQR(go->neg_lqr) + + LENCICBCP(go->neg_cbcp) + + LENCILONG(go->neg_magicnumber) + + LENCIVOID(go->neg_pcompression) + + LENCIVOID(go->neg_accompression)); +} + + +/* + * lcp_addci - Add our desired CIs to a packet. + */ +static void lcp_addci(fsm *f, u_char *ucp, int *lenp) +{ + lcp_options *go = &lcp_gotoptions[f->unit]; + u_char *start_ucp = ucp; + +#define ADDCIVOID(opt, neg) \ + if (neg) { \ + LCPDEBUG((LOG_INFO, "lcp_addci: opt=%d\n", opt)); \ + PUTCHAR(opt, ucp); \ + PUTCHAR(CILEN_VOID, ucp); \ + } +#define ADDCISHORT(opt, neg, val) \ + if (neg) { \ + LCPDEBUG((LOG_INFO, "lcp_addci: INT opt=%d %X\n", opt, val)); \ + PUTCHAR(opt, ucp); \ + PUTCHAR(CILEN_SHORT, ucp); \ + PUTSHORT(val, ucp); \ + } +#define ADDCICHAP(opt, neg, val, digest) \ + if (neg) { \ + LCPDEBUG((LOG_INFO, "lcp_addci: CHAP opt=%d %X\n", opt, val)); \ + PUTCHAR(opt, ucp); \ + PUTCHAR(CILEN_CHAP, ucp); \ + PUTSHORT(val, ucp); \ + PUTCHAR(digest, ucp); \ + } +#define ADDCILONG(opt, neg, val) \ + if (neg) { \ + LCPDEBUG((LOG_INFO, "lcp_addci: L opt=%d %lX\n", opt, val)); \ + PUTCHAR(opt, ucp); \ + PUTCHAR(CILEN_LONG, ucp); \ + PUTLONG(val, ucp); \ + } +#define ADDCILQR(opt, neg, val) \ + if (neg) { \ + LCPDEBUG((LOG_INFO, "lcp_addci: LQR opt=%d %lX\n", opt, val)); \ + PUTCHAR(opt, ucp); \ + PUTCHAR(CILEN_LQR, ucp); \ + PUTSHORT(PPP_LQR, ucp); \ + PUTLONG(val, ucp); \ + } +#define ADDCICHAR(opt, neg, val) \ + if (neg) { \ + LCPDEBUG((LOG_INFO, "lcp_addci: CHAR opt=%d %X '%z'\n", opt, val, val)); \ + PUTCHAR(opt, ucp); \ + PUTCHAR(CILEN_CHAR, ucp); \ + PUTCHAR(val, ucp); \ + } + + ADDCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru); + ADDCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, + go->asyncmap); + ADDCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype); + ADDCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP); + ADDCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period); + ADDCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT); + ADDCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber); + ADDCIVOID(CI_PCOMPRESSION, go->neg_pcompression); + ADDCIVOID(CI_ACCOMPRESSION, go->neg_accompression); + + if (ucp - start_ucp != *lenp) { + /* this should never happen, because peer_mtu should be 1500 */ + LCPDEBUG((LOG_ERR, "Bug in lcp_addci: wrong length\n")); + } +} + + +/* + * lcp_ackci - Ack our CIs. + * This should not modify any state if the Ack is bad. + * + * Returns: + * 0 - Ack was bad. + * 1 - Ack was good. + */ +static int lcp_ackci(fsm *f, u_char *p, int len) +{ + lcp_options *go = &lcp_gotoptions[f->unit]; + u_char cilen, citype, cichar; + u_short cishort; + u32_t cilong; + + /* + * CIs must be in exactly the same order that we sent. + * Check packet length and CI length at each step. + * If we find any deviations, then this packet is bad. + */ +#define ACKCIVOID(opt, neg) \ + if (neg) { \ + if ((len -= CILEN_VOID) < 0) \ + goto bad; \ + GETCHAR(citype, p); \ + GETCHAR(cilen, p); \ + if (cilen != CILEN_VOID || \ + citype != opt) \ + goto bad; \ + } +#define ACKCISHORT(opt, neg, val) \ + if (neg) { \ + if ((len -= CILEN_SHORT) < 0) \ + goto bad; \ + GETCHAR(citype, p); \ + GETCHAR(cilen, p); \ + if (cilen != CILEN_SHORT || \ + citype != opt) \ + goto bad; \ + GETSHORT(cishort, p); \ + if (cishort != val) \ + goto bad; \ + } +#define ACKCICHAR(opt, neg, val) \ + if (neg) { \ + if ((len -= CILEN_CHAR) < 0) \ + goto bad; \ + GETCHAR(citype, p); \ + GETCHAR(cilen, p); \ + if (cilen != CILEN_CHAR || \ + citype != opt) \ + goto bad; \ + GETCHAR(cichar, p); \ + if (cichar != val) \ + goto bad; \ + } +#define ACKCICHAP(opt, neg, val, digest) \ + if (neg) { \ + if ((len -= CILEN_CHAP) < 0) \ + goto bad; \ + GETCHAR(citype, p); \ + GETCHAR(cilen, p); \ + if (cilen != CILEN_CHAP || \ + citype != opt) \ + goto bad; \ + GETSHORT(cishort, p); \ + if (cishort != val) \ + goto bad; \ + GETCHAR(cichar, p); \ + if (cichar != digest) \ + goto bad; \ + } +#define ACKCILONG(opt, neg, val) \ + if (neg) { \ + if ((len -= CILEN_LONG) < 0) \ + goto bad; \ + GETCHAR(citype, p); \ + GETCHAR(cilen, p); \ + if (cilen != CILEN_LONG || \ + citype != opt) \ + goto bad; \ + GETLONG(cilong, p); \ + if (cilong != val) \ + goto bad; \ + } +#define ACKCILQR(opt, neg, val) \ + if (neg) { \ + if ((len -= CILEN_LQR) < 0) \ + goto bad; \ + GETCHAR(citype, p); \ + GETCHAR(cilen, p); \ + if (cilen != CILEN_LQR || \ + citype != opt) \ + goto bad; \ + GETSHORT(cishort, p); \ + if (cishort != PPP_LQR) \ + goto bad; \ + GETLONG(cilong, p); \ + if (cilong != val) \ + goto bad; \ + } + + ACKCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru); + ACKCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, + go->asyncmap); + ACKCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype); + ACKCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP); + ACKCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period); + ACKCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT); + ACKCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber); + ACKCIVOID(CI_PCOMPRESSION, go->neg_pcompression); + ACKCIVOID(CI_ACCOMPRESSION, go->neg_accompression); + + /* + * If there are any remaining CIs, then this packet is bad. + */ + if (len != 0) + goto bad; + LCPDEBUG((LOG_INFO, "lcp_acki: Ack\n")); + return (1); +bad: + LCPDEBUG((LOG_WARNING, "lcp_acki: received bad Ack!\n")); + return (0); +} + + +/* + * lcp_nakci - Peer has sent a NAK for some of our CIs. + * This should not modify any state if the Nak is bad + * or if LCP is in the OPENED state. + * + * Returns: + * 0 - Nak was bad. + * 1 - Nak was good. + */ +static int lcp_nakci(fsm *f, u_char *p, int len) +{ + lcp_options *go = &lcp_gotoptions[f->unit]; + lcp_options *wo = &lcp_wantoptions[f->unit]; + u_char citype, cichar, *next; + u_short cishort; + u32_t cilong; + lcp_options no; /* options we've seen Naks for */ + lcp_options try; /* options to request next time */ + int looped_back = 0; + int cilen; + + BZERO(&no, sizeof(no)); + try = *go; + + /* + * Any Nak'd CIs must be in exactly the same order that we sent. + * Check packet length and CI length at each step. + * If we find any deviations, then this packet is bad. + */ +#define NAKCIVOID(opt, neg, code) \ + if (go->neg && \ + len >= CILEN_VOID && \ + p[1] == CILEN_VOID && \ + p[0] == opt) { \ + len -= CILEN_VOID; \ + INCPTR(CILEN_VOID, p); \ + no.neg = 1; \ + code \ + } +#define NAKCICHAP(opt, neg, code) \ + if (go->neg && \ + len >= CILEN_CHAP && \ + p[1] == CILEN_CHAP && \ + p[0] == opt) { \ + len -= CILEN_CHAP; \ + INCPTR(2, p); \ + GETSHORT(cishort, p); \ + GETCHAR(cichar, p); \ + no.neg = 1; \ + code \ + } +#define NAKCICHAR(opt, neg, code) \ + if (go->neg && \ + len >= CILEN_CHAR && \ + p[1] == CILEN_CHAR && \ + p[0] == opt) { \ + len -= CILEN_CHAR; \ + INCPTR(2, p); \ + GETCHAR(cichar, p); \ + no.neg = 1; \ + code \ + } +#define NAKCISHORT(opt, neg, code) \ + if (go->neg && \ + len >= CILEN_SHORT && \ + p[1] == CILEN_SHORT && \ + p[0] == opt) { \ + len -= CILEN_SHORT; \ + INCPTR(2, p); \ + GETSHORT(cishort, p); \ + no.neg = 1; \ + code \ + } +#define NAKCILONG(opt, neg, code) \ + if (go->neg && \ + len >= CILEN_LONG && \ + p[1] == CILEN_LONG && \ + p[0] == opt) { \ + len -= CILEN_LONG; \ + INCPTR(2, p); \ + GETLONG(cilong, p); \ + no.neg = 1; \ + code \ + } +#define NAKCILQR(opt, neg, code) \ + if (go->neg && \ + len >= CILEN_LQR && \ + p[1] == CILEN_LQR && \ + p[0] == opt) { \ + len -= CILEN_LQR; \ + INCPTR(2, p); \ + GETSHORT(cishort, p); \ + GETLONG(cilong, p); \ + no.neg = 1; \ + code \ + } + + /* + * We don't care if they want to send us smaller packets than + * we want. Therefore, accept any MRU less than what we asked for, + * but then ignore the new value when setting the MRU in the kernel. + * If they send us a bigger MRU than what we asked, accept it, up to + * the limit of the default MRU we'd get if we didn't negotiate. + */ + if (go->neg_mru && go->mru != PPP_DEFMRU) { + NAKCISHORT(CI_MRU, neg_mru, + if (cishort <= wo->mru || cishort < PPP_DEFMRU) + try.mru = cishort; + ); + } + + /* + * Add any characters they want to our (receive-side) asyncmap. + */ + if (go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) { + NAKCILONG(CI_ASYNCMAP, neg_asyncmap, + try.asyncmap = go->asyncmap | cilong; + ); + } + + /* + * If they've nak'd our authentication-protocol, check whether + * they are proposing a different protocol, or a different + * hash algorithm for CHAP. + */ + if ((go->neg_chap || go->neg_upap) + && len >= CILEN_SHORT + && p[0] == CI_AUTHTYPE && p[1] >= CILEN_SHORT && p[1] <= len) { + cilen = p[1]; + len -= cilen; + no.neg_chap = go->neg_chap; + no.neg_upap = go->neg_upap; + INCPTR(2, p); + GETSHORT(cishort, p); + if (cishort == PPP_PAP && cilen == CILEN_SHORT) { + /* + * If we were asking for CHAP, they obviously don't want to do it. + * If we weren't asking for CHAP, then we were asking for PAP, + * in which case this Nak is bad. + */ + if (!go->neg_chap) + goto bad; + try.neg_chap = 0; + + } else if (cishort == PPP_CHAP && cilen == CILEN_CHAP) { + GETCHAR(cichar, p); + if (go->neg_chap) { + /* + * We were asking for CHAP/MD5; they must want a different + * algorithm. If they can't do MD5, we'll have to stop + * asking for CHAP. + */ + if (cichar != go->chap_mdtype) + try.neg_chap = 0; + } else { + /* + * Stop asking for PAP if we were asking for it. + */ + try.neg_upap = 0; + } + + } else { + /* + * We don't recognize what they're suggesting. + * Stop asking for what we were asking for. + */ + if (go->neg_chap) + try.neg_chap = 0; + else + try.neg_upap = 0; + p += cilen - CILEN_SHORT; + } + } + + /* + * If they can't cope with our link quality protocol, we'll have + * to stop asking for LQR. We haven't got any other protocol. + * If they Nak the reporting period, take their value XXX ? + */ + NAKCILQR(CI_QUALITY, neg_lqr, + if (cishort != PPP_LQR) + try.neg_lqr = 0; + else + try.lqr_period = cilong; + ); + + /* + * Only implementing CBCP...not the rest of the callback options + */ + NAKCICHAR(CI_CALLBACK, neg_cbcp, + try.neg_cbcp = 0; + ); + + /* + * Check for a looped-back line. + */ + NAKCILONG(CI_MAGICNUMBER, neg_magicnumber, + try.magicnumber = magic(); + looped_back = 1; + ); + + /* + * Peer shouldn't send Nak for protocol compression or + * address/control compression requests; they should send + * a Reject instead. If they send a Nak, treat it as a Reject. + */ + NAKCIVOID(CI_PCOMPRESSION, neg_pcompression, + try.neg_pcompression = 0; + ); + NAKCIVOID(CI_ACCOMPRESSION, neg_accompression, + try.neg_accompression = 0; + ); + + /* + * There may be remaining CIs, if the peer is requesting negotiation + * on an option that we didn't include in our request packet. + * If we see an option that we requested, or one we've already seen + * in this packet, then this packet is bad. + * If we wanted to respond by starting to negotiate on the requested + * option(s), we could, but we don't, because except for the + * authentication type and quality protocol, if we are not negotiating + * an option, it is because we were told not to. + * For the authentication type, the Nak from the peer means + * `let me authenticate myself with you' which is a bit pointless. + * For the quality protocol, the Nak means `ask me to send you quality + * reports', but if we didn't ask for them, we don't want them. + * An option we don't recognize represents the peer asking to + * negotiate some option we don't support, so ignore it. + */ + while (len > CILEN_VOID) { + GETCHAR(citype, p); + GETCHAR(cilen, p); + if (cilen < CILEN_VOID || (len -= cilen) < 0) + goto bad; + next = p + cilen - 2; + + switch (citype) { + case CI_MRU: + if ((go->neg_mru && go->mru != PPP_DEFMRU) + || no.neg_mru || cilen != CILEN_SHORT) + goto bad; + GETSHORT(cishort, p); + if (cishort < PPP_DEFMRU) + try.mru = cishort; + break; + case CI_ASYNCMAP: + if ((go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) + || no.neg_asyncmap || cilen != CILEN_LONG) + goto bad; + break; + case CI_AUTHTYPE: + if (go->neg_chap || no.neg_chap || go->neg_upap || no.neg_upap) + goto bad; + break; + case CI_MAGICNUMBER: + if (go->neg_magicnumber || no.neg_magicnumber || + cilen != CILEN_LONG) + goto bad; + break; + case CI_PCOMPRESSION: + if (go->neg_pcompression || no.neg_pcompression + || cilen != CILEN_VOID) + goto bad; + break; + case CI_ACCOMPRESSION: + if (go->neg_accompression || no.neg_accompression + || cilen != CILEN_VOID) + goto bad; + break; + case CI_QUALITY: + if (go->neg_lqr || no.neg_lqr || cilen != CILEN_LQR) + goto bad; + break; + } + p = next; + } + + /* If there is still anything left, this packet is bad. */ + if (len != 0) + goto bad; + + /* + * OK, the Nak is good. Now we can update state. + */ + if (f->state != OPENED) { + if (looped_back) { + if (++try.numloops >= lcp_loopbackfail) { + LCPDEBUG((LOG_NOTICE, "Serial line is looped back.\n")); + lcp_close(f->unit, "Loopback detected"); + } + } + else + try.numloops = 0; + *go = try; + } + + return 1; + +bad: + LCPDEBUG((LOG_WARNING, "lcp_nakci: received bad Nak!\n")); + return 0; +} + + +/* + * lcp_rejci - Peer has Rejected some of our CIs. + * This should not modify any state if the Reject is bad + * or if LCP is in the OPENED state. + * + * Returns: + * 0 - Reject was bad. + * 1 - Reject was good. + */ +static int lcp_rejci(fsm *f, u_char *p, int len) +{ + lcp_options *go = &lcp_gotoptions[f->unit]; + u_char cichar; + u_short cishort; + u32_t cilong; + lcp_options try; /* options to request next time */ + + try = *go; + + /* + * Any Rejected CIs must be in exactly the same order that we sent. + * Check packet length and CI length at each step. + * If we find any deviations, then this packet is bad. + */ +#define REJCIVOID(opt, neg) \ + if (go->neg && \ + len >= CILEN_VOID && \ + p[1] == CILEN_VOID && \ + p[0] == opt) { \ + len -= CILEN_VOID; \ + INCPTR(CILEN_VOID, p); \ + try.neg = 0; \ + LCPDEBUG((LOG_INFO, "lcp_rejci: void opt %d rejected\n", opt)); \ + } +#define REJCISHORT(opt, neg, val) \ + if (go->neg && \ + len >= CILEN_SHORT && \ + p[1] == CILEN_SHORT && \ + p[0] == opt) { \ + len -= CILEN_SHORT; \ + INCPTR(2, p); \ + GETSHORT(cishort, p); \ + /* Check rejected value. */ \ + if (cishort != val) \ + goto bad; \ + try.neg = 0; \ + LCPDEBUG((LOG_INFO,"lcp_rejci: short opt %d rejected\n", opt)); \ + } +#define REJCICHAP(opt, neg, val, digest) \ + if (go->neg && \ + len >= CILEN_CHAP && \ + p[1] == CILEN_CHAP && \ + p[0] == opt) { \ + len -= CILEN_CHAP; \ + INCPTR(2, p); \ + GETSHORT(cishort, p); \ + GETCHAR(cichar, p); \ + /* Check rejected value. */ \ + if (cishort != val || cichar != digest) \ + goto bad; \ + try.neg = 0; \ + try.neg_upap = 0; \ + LCPDEBUG((LOG_INFO,"lcp_rejci: chap opt %d rejected\n", opt)); \ + } +#define REJCILONG(opt, neg, val) \ + if (go->neg && \ + len >= CILEN_LONG && \ + p[1] == CILEN_LONG && \ + p[0] == opt) { \ + len -= CILEN_LONG; \ + INCPTR(2, p); \ + GETLONG(cilong, p); \ + /* Check rejected value. */ \ + if (cilong != val) \ + goto bad; \ + try.neg = 0; \ + LCPDEBUG((LOG_INFO,"lcp_rejci: long opt %d rejected\n", opt)); \ + } +#define REJCILQR(opt, neg, val) \ + if (go->neg && \ + len >= CILEN_LQR && \ + p[1] == CILEN_LQR && \ + p[0] == opt) { \ + len -= CILEN_LQR; \ + INCPTR(2, p); \ + GETSHORT(cishort, p); \ + GETLONG(cilong, p); \ + /* Check rejected value. */ \ + if (cishort != PPP_LQR || cilong != val) \ + goto bad; \ + try.neg = 0; \ + LCPDEBUG((LOG_INFO,"lcp_rejci: LQR opt %d rejected\n", opt)); \ + } +#define REJCICBCP(opt, neg, val) \ + if (go->neg && \ + len >= CILEN_CBCP && \ + p[1] == CILEN_CBCP && \ + p[0] == opt) { \ + len -= CILEN_CBCP; \ + INCPTR(2, p); \ + GETCHAR(cichar, p); \ + /* Check rejected value. */ \ + if (cichar != val) \ + goto bad; \ + try.neg = 0; \ + LCPDEBUG((LOG_INFO,"lcp_rejci: Callback opt %d rejected\n", opt)); \ + } + + REJCISHORT(CI_MRU, neg_mru, go->mru); + REJCILONG(CI_ASYNCMAP, neg_asyncmap, go->asyncmap); + REJCICHAP(CI_AUTHTYPE, neg_chap, PPP_CHAP, go->chap_mdtype); + if (!go->neg_chap) { + REJCISHORT(CI_AUTHTYPE, neg_upap, PPP_PAP); + } + REJCILQR(CI_QUALITY, neg_lqr, go->lqr_period); + REJCICBCP(CI_CALLBACK, neg_cbcp, CBCP_OPT); + REJCILONG(CI_MAGICNUMBER, neg_magicnumber, go->magicnumber); + REJCIVOID(CI_PCOMPRESSION, neg_pcompression); + REJCIVOID(CI_ACCOMPRESSION, neg_accompression); + + /* + * If there are any remaining CIs, then this packet is bad. + */ + if (len != 0) + goto bad; + /* + * Now we can update state. + */ + if (f->state != OPENED) + *go = try; + return 1; + +bad: + LCPDEBUG((LOG_WARNING, "lcp_rejci: received bad Reject!\n")); + return 0; +} + + +/* + * lcp_reqci - Check the peer's requested CIs and send appropriate response. + * + * Returns: CONFACK, CONFNAK or CONFREJ and input packet modified + * appropriately. If reject_if_disagree is non-zero, doesn't return + * CONFNAK; returns CONFREJ if it can't return CONFACK. + */ +static int lcp_reqci(fsm *f, + u_char *inp, /* Requested CIs */ + int *lenp, /* Length of requested CIs */ + int reject_if_disagree) +{ + lcp_options *go = &lcp_gotoptions[f->unit]; + lcp_options *ho = &lcp_hisoptions[f->unit]; + lcp_options *ao = &lcp_allowoptions[f->unit]; + u_char *cip, *next; /* Pointer to current and next CIs */ + int cilen, citype, cichar; /* Parsed len, type, char value */ + u_short cishort; /* Parsed short value */ + u32_t cilong; /* Parse long value */ + int rc = CONFACK; /* Final packet return code */ + int orc; /* Individual option return code */ + u_char *p; /* Pointer to next char to parse */ + u_char *rejp; /* Pointer to next char in reject frame */ + u_char *nakp; /* Pointer to next char in Nak frame */ + int l = *lenp; /* Length left */ +#if TRACELCP > 0 + char traceBuf[80]; + int traceNdx = 0; +#endif + + /* + * Reset all his options. + */ + BZERO(ho, sizeof(*ho)); + + /* + * Process all his options. + */ + next = inp; + nakp = nak_buffer; + rejp = inp; + while (l) { + orc = CONFACK; /* Assume success */ + cip = p = next; /* Remember begining of CI */ + if (l < 2 || /* Not enough data for CI header or */ + p[1] < 2 || /* CI length too small or */ + p[1] > l) { /* CI length too big? */ + LCPDEBUG((LOG_WARNING, "lcp_reqci: bad CI length!\n")); + orc = CONFREJ; /* Reject bad CI */ + cilen = l; /* Reject till end of packet */ + l = 0; /* Don't loop again */ + citype = 0; + goto endswitch; + } + GETCHAR(citype, p); /* Parse CI type */ + GETCHAR(cilen, p); /* Parse CI length */ + l -= cilen; /* Adjust remaining length */ + next += cilen; /* Step to next CI */ + + switch (citype) { /* Check CI type */ + case CI_MRU: + if (!ao->neg_mru) { /* Allow option? */ + LCPDEBUG((LOG_INFO, "lcp_reqci: Reject MRU - not allowed\n")); + orc = CONFREJ; /* Reject CI */ + break; + } else if (cilen != CILEN_SHORT) { /* Check CI length */ + LCPDEBUG((LOG_INFO, "lcp_reqci: Reject MRU - bad length\n")); + orc = CONFREJ; /* Reject CI */ + break; + } + GETSHORT(cishort, p); /* Parse MRU */ + + /* + * He must be able to receive at least our minimum. + * No need to check a maximum. If he sends a large number, + * we'll just ignore it. + */ + if (cishort < PPP_MINMRU) { + LCPDEBUG((LOG_INFO, "lcp_reqci: Nak - MRU too small\n")); + orc = CONFNAK; /* Nak CI */ + PUTCHAR(CI_MRU, nakp); + PUTCHAR(CILEN_SHORT, nakp); + PUTSHORT(PPP_MINMRU, nakp); /* Give him a hint */ + break; + } + ho->neg_mru = 1; /* Remember he sent MRU */ + ho->mru = cishort; /* And remember value */ +#if TRACELCP > 0 + sprintf(&traceBuf[traceNdx], " MRU %d", cishort); + traceNdx = strlen(traceBuf); +#endif + break; + + case CI_ASYNCMAP: + if (!ao->neg_asyncmap) { + LCPDEBUG((LOG_INFO, "lcp_reqci: Reject ASYNCMAP not allowed\n")); + orc = CONFREJ; + break; + } else if (cilen != CILEN_LONG) { + LCPDEBUG((LOG_INFO, "lcp_reqci: Reject ASYNCMAP bad length\n")); + orc = CONFREJ; + break; + } + GETLONG(cilong, p); + + /* + * Asyncmap must have set at least the bits + * which are set in lcp_allowoptions[unit].asyncmap. + */ + if ((ao->asyncmap & ~cilong) != 0) { + LCPDEBUG((LOG_INFO, "lcp_reqci: Nak ASYNCMAP %lX missing %lX\n", + cilong, ao->asyncmap)); + orc = CONFNAK; + PUTCHAR(CI_ASYNCMAP, nakp); + PUTCHAR(CILEN_LONG, nakp); + PUTLONG(ao->asyncmap | cilong, nakp); + break; + } + ho->neg_asyncmap = 1; + ho->asyncmap = cilong; +#if TRACELCP > 0 + sprintf(&traceBuf[traceNdx], " ASYNCMAP=%lX", cilong); + traceNdx = strlen(traceBuf); +#endif + break; + + case CI_AUTHTYPE: + if (cilen < CILEN_SHORT) { + LCPDEBUG((LOG_INFO, "lcp_reqci: Reject AUTHTYPE missing arg\n")); + orc = CONFREJ; + break; + } else if (!(ao->neg_upap || ao->neg_chap)) { + /* + * Reject the option if we're not willing to authenticate. + */ + LCPDEBUG((LOG_INFO, "lcp_reqci: Reject AUTHTYPE not allowed\n")); + orc = CONFREJ; + break; + } + GETSHORT(cishort, p); + + /* + * Authtype must be UPAP or CHAP. + * + * Note: if both ao->neg_upap and ao->neg_chap are set, + * and the peer sends a Configure-Request with two + * authenticate-protocol requests, one for CHAP and one + * for UPAP, then we will reject the second request. + * Whether we end up doing CHAP or UPAP depends then on + * the ordering of the CIs in the peer's Configure-Request. + */ + + if (cishort == PPP_PAP) { + if (ho->neg_chap) { /* we've already accepted CHAP */ + LCPDEBUG((LOG_WARNING, "lcp_reqci: Reject AUTHTYPE PAP already accepted\n")); + orc = CONFREJ; + break; + } else if (cilen != CILEN_SHORT) { + LCPDEBUG((LOG_WARNING, "lcp_reqci: Reject AUTHTYPE PAP bad len\n")); + orc = CONFREJ; + break; + } + if (!ao->neg_upap) { /* we don't want to do PAP */ + LCPDEBUG((LOG_WARNING, "lcp_reqci: Nak AUTHTYPE PAP not allowed\n")); + orc = CONFNAK; /* NAK it and suggest CHAP */ + PUTCHAR(CI_AUTHTYPE, nakp); + PUTCHAR(CILEN_CHAP, nakp); + PUTSHORT(PPP_CHAP, nakp); + PUTCHAR(ao->chap_mdtype, nakp); + break; + } + ho->neg_upap = 1; +#if TRACELCP > 0 + sprintf(&traceBuf[traceNdx], " PAP (%X)", cishort); + traceNdx = strlen(traceBuf); +#endif + break; + } + if (cishort == PPP_CHAP) { + if (ho->neg_upap) { /* we've already accepted PAP */ + LCPDEBUG((LOG_WARNING, "lcp_reqci: Reject AUTHTYPE CHAP accepted PAP\n")); + orc = CONFREJ; + break; + } else if (cilen != CILEN_CHAP) { + LCPDEBUG((LOG_WARNING, "lcp_reqci: Reject AUTHTYPE CHAP bad len\n")); + orc = CONFREJ; + break; + } + if (!ao->neg_chap) { /* we don't want to do CHAP */ + LCPDEBUG((LOG_WARNING, "lcp_reqci: Nak AUTHTYPE CHAP not allowed\n")); + orc = CONFNAK; /* NAK it and suggest PAP */ + PUTCHAR(CI_AUTHTYPE, nakp); + PUTCHAR(CILEN_SHORT, nakp); + PUTSHORT(PPP_PAP, nakp); + break; + } + GETCHAR(cichar, p); /* get digest type*/ + if (cichar != CHAP_DIGEST_MD5 +#ifdef CHAPMS + && cichar != CHAP_MICROSOFT +#endif + ) { + LCPDEBUG((LOG_WARNING, "lcp_reqci: Nak AUTHTYPE CHAP digest=%d\n", cichar)); + orc = CONFNAK; + PUTCHAR(CI_AUTHTYPE, nakp); + PUTCHAR(CILEN_CHAP, nakp); + PUTSHORT(PPP_CHAP, nakp); + PUTCHAR(ao->chap_mdtype, nakp); + break; + } +#if TRACELCP > 0 + sprintf(&traceBuf[traceNdx], " CHAP %X,%d", cishort, cichar); + traceNdx = strlen(traceBuf); +#endif + ho->chap_mdtype = cichar; /* save md type */ + ho->neg_chap = 1; + break; + } + + /* + * We don't recognize the protocol they're asking for. + * Nak it with something we're willing to do. + * (At this point we know ao->neg_upap || ao->neg_chap.) + */ + orc = CONFNAK; + PUTCHAR(CI_AUTHTYPE, nakp); + if (ao->neg_chap) { + LCPDEBUG((LOG_WARNING, "lcp_reqci: Nak AUTHTYPE %d req CHAP\n", cishort)); + PUTCHAR(CILEN_CHAP, nakp); + PUTSHORT(PPP_CHAP, nakp); + PUTCHAR(ao->chap_mdtype, nakp); + } + else { + LCPDEBUG((LOG_WARNING, "lcp_reqci: Nak AUTHTYPE %d req PAP\n", cishort)); + PUTCHAR(CILEN_SHORT, nakp); + PUTSHORT(PPP_PAP, nakp); + } + break; + + case CI_QUALITY: + GETSHORT(cishort, p); + GETLONG(cilong, p); +#if TRACELCP > 0 + sprintf(&traceBuf[traceNdx], " QUALITY (%x %x)", cishort, (unsigned int) cilong); + traceNdx = strlen(traceBuf); +#endif + + if (!ao->neg_lqr || + cilen != CILEN_LQR) { + orc = CONFREJ; + break; + } + + /* + * Check the protocol and the reporting period. + * XXX When should we Nak this, and what with? + */ + if (cishort != PPP_LQR) { + orc = CONFNAK; + PUTCHAR(CI_QUALITY, nakp); + PUTCHAR(CILEN_LQR, nakp); + PUTSHORT(PPP_LQR, nakp); + PUTLONG(ao->lqr_period, nakp); + break; + } + break; + + case CI_MAGICNUMBER: + if (!(ao->neg_magicnumber || go->neg_magicnumber) || + cilen != CILEN_LONG) { + orc = CONFREJ; + break; + } + GETLONG(cilong, p); +#if TRACELCP > 0 + sprintf(&traceBuf[traceNdx], " MAGICNUMBER (%lX)", cilong); + traceNdx = strlen(traceBuf); +#endif + + /* + * He must have a different magic number. + */ + if (go->neg_magicnumber && + cilong == go->magicnumber) { + cilong = magic(); /* Don't put magic() inside macro! */ + orc = CONFNAK; + PUTCHAR(CI_MAGICNUMBER, nakp); + PUTCHAR(CILEN_LONG, nakp); + PUTLONG(cilong, nakp); + break; + } + ho->neg_magicnumber = 1; + ho->magicnumber = cilong; + break; + + + case CI_PCOMPRESSION: +#if TRACELCP > 0 + sprintf(&traceBuf[traceNdx], " PCOMPRESSION"); + traceNdx = strlen(traceBuf); +#endif + if (!ao->neg_pcompression || + cilen != CILEN_VOID) { + orc = CONFREJ; + break; + } + ho->neg_pcompression = 1; + break; + + case CI_ACCOMPRESSION: +#if TRACELCP > 0 + sprintf(&traceBuf[traceNdx], " ACCOMPRESSION"); + traceNdx = strlen(traceBuf); +#endif + if (!ao->neg_accompression || + cilen != CILEN_VOID) { + orc = CONFREJ; + break; + } + ho->neg_accompression = 1; + break; + + case CI_MRRU: +#if TRACELCP > 0 + sprintf(&traceBuf[traceNdx], " CI_MRRU"); + traceNdx = strlen(traceBuf); +#endif + orc = CONFREJ; + break; + + case CI_SSNHF: +#if TRACELCP > 0 + sprintf(&traceBuf[traceNdx], " CI_SSNHF"); + traceNdx = strlen(traceBuf); +#endif + orc = CONFREJ; + break; + + case CI_EPDISC: +#if TRACELCP > 0 + sprintf(&traceBuf[traceNdx], " CI_EPDISC"); + traceNdx = strlen(traceBuf); +#endif + orc = CONFREJ; + break; + + default: +#if TRACELCP + sprintf(&traceBuf[traceNdx], " unknown %d", citype); + traceNdx = strlen(traceBuf); +#endif + orc = CONFREJ; + break; + } + + endswitch: +#if TRACELCP + if (traceNdx >= 80 - 32) { + LCPDEBUG((LOG_INFO, "lcp_reqci: rcvd%s\n", traceBuf)); + traceNdx = 0; + } +#endif + if (orc == CONFACK && /* Good CI */ + rc != CONFACK) /* but prior CI wasnt? */ + continue; /* Don't send this one */ + + if (orc == CONFNAK) { /* Nak this CI? */ + if (reject_if_disagree /* Getting fed up with sending NAKs? */ + && citype != CI_MAGICNUMBER) { + orc = CONFREJ; /* Get tough if so */ + } + else { + if (rc == CONFREJ) /* Rejecting prior CI? */ + continue; /* Don't send this one */ + rc = CONFNAK; + } + } + if (orc == CONFREJ) { /* Reject this CI */ + rc = CONFREJ; + if (cip != rejp) /* Need to move rejected CI? */ + BCOPY(cip, rejp, cilen); /* Move it */ + INCPTR(cilen, rejp); /* Update output pointer */ + } + } + + /* + * If we wanted to send additional NAKs (for unsent CIs), the + * code would go here. The extra NAKs would go at *nakp. + * At present there are no cases where we want to ask the + * peer to negotiate an option. + */ + + switch (rc) { + case CONFACK: + *lenp = (int)(next - inp); + break; + case CONFNAK: + /* + * Copy the Nak'd options from the nak_buffer to the caller's buffer. + */ + *lenp = (int)(nakp - nak_buffer); + BCOPY(nak_buffer, inp, *lenp); + break; + case CONFREJ: + *lenp = (int)(rejp - inp); + break; + } + +#if TRACELCP > 0 + if (traceNdx > 0) { + LCPDEBUG((LOG_INFO, "lcp_reqci: %s\n", traceBuf)); + } +#endif + LCPDEBUG((LOG_INFO, "lcp_reqci: returning CONF%s.\n", CODENAME(rc))); + return (rc); /* Return final code */ +} + + +/* + * lcp_up - LCP has come UP. + */ +static void lcp_up(fsm *f) +{ + lcp_options *wo = &lcp_wantoptions[f->unit]; + lcp_options *ho = &lcp_hisoptions[f->unit]; + lcp_options *go = &lcp_gotoptions[f->unit]; + lcp_options *ao = &lcp_allowoptions[f->unit]; + + if (!go->neg_magicnumber) + go->magicnumber = 0; + if (!ho->neg_magicnumber) + ho->magicnumber = 0; + + /* + * Set our MTU to the smaller of the MTU we wanted and + * the MRU our peer wanted. If we negotiated an MRU, + * set our MRU to the larger of value we wanted and + * the value we got in the negotiation. + */ + ppp_send_config(f->unit, LWIP_MIN(ao->mru, (ho->neg_mru? ho->mru: PPP_MRU)), + (ho->neg_asyncmap? ho->asyncmap: 0xffffffffl), + ho->neg_pcompression, ho->neg_accompression); + /* + * If the asyncmap hasn't been negotiated, we really should + * set the receive asyncmap to ffffffff, but we set it to 0 + * for backwards contemptibility. + */ + ppp_recv_config(f->unit, (go->neg_mru? LWIP_MAX(wo->mru, go->mru): PPP_MRU), + (go->neg_asyncmap? go->asyncmap: 0x00000000), + go->neg_pcompression, go->neg_accompression); + + if (ho->neg_mru) + peer_mru[f->unit] = ho->mru; + + lcp_echo_lowerup(f->unit); /* Enable echo messages */ + + link_established(f->unit); +} + + +/* + * lcp_down - LCP has gone DOWN. + * + * Alert other protocols. + */ +static void lcp_down(fsm *f) +{ + lcp_options *go = &lcp_gotoptions[f->unit]; + + lcp_echo_lowerdown(f->unit); + + link_down(f->unit); + + ppp_send_config(f->unit, PPP_MRU, 0xffffffffl, 0, 0); + ppp_recv_config(f->unit, PPP_MRU, + (go->neg_asyncmap? go->asyncmap: 0x00000000), + go->neg_pcompression, go->neg_accompression); + peer_mru[f->unit] = PPP_MRU; +} + + +/* + * lcp_starting - LCP needs the lower layer up. + */ +static void lcp_starting(fsm *f) +{ + link_required(f->unit); +} + + +/* + * lcp_finished - LCP has finished with the lower layer. + */ +static void lcp_finished(fsm *f) +{ + link_terminated(f->unit); +} + + +#if 0 +/* + * print_string - print a readable representation of a string using + * printer. + */ +static void print_string( + char *p, + int len, + void (*printer) (void *, char *, ...), + void *arg +) +{ + int c; + + printer(arg, "\""); + for (; len > 0; --len) { + c = *p++; + if (' ' <= c && c <= '~') { + if (c == '\\' || c == '"') + printer(arg, "\\"); + printer(arg, "%c", c); + } else { + switch (c) { + case '\n': + printer(arg, "\\n"); + break; + case '\r': + printer(arg, "\\r"); + break; + case '\t': + printer(arg, "\\t"); + break; + default: + printer(arg, "\\%.3o", c); + } + } + } + printer(arg, "\""); +} + + +/* + * lcp_printpkt - print the contents of an LCP packet. + */ +static char *lcp_codenames[] = { + "ConfReq", "ConfAck", "ConfNak", "ConfRej", + "TermReq", "TermAck", "CodeRej", "ProtRej", + "EchoReq", "EchoRep", "DiscReq" +}; + +static int lcp_printpkt( + u_char *p, + int plen, + void (*printer) (void *, char *, ...), + void *arg +) +{ + int code, id, len, olen; + u_char *pstart, *optend; + u_short cishort; + u32_t cilong; + + if (plen < HEADERLEN) + return 0; + pstart = p; + GETCHAR(code, p); + GETCHAR(id, p); + GETSHORT(len, p); + if (len < HEADERLEN || len > plen) + return 0; + + if (code >= 1 && code <= sizeof(lcp_codenames) / sizeof(char *)) + printer(arg, " %s", lcp_codenames[code-1]); + else + printer(arg, " code=0x%x", code); + printer(arg, " id=0x%x", id); + len -= HEADERLEN; + switch (code) { + case CONFREQ: + case CONFACK: + case CONFNAK: + case CONFREJ: + /* print option list */ + while (len >= 2) { + GETCHAR(code, p); + GETCHAR(olen, p); + p -= 2; + if (olen < 2 || olen > len) { + break; + } + printer(arg, " <"); + len -= olen; + optend = p + olen; + switch (code) { + case CI_MRU: + if (olen == CILEN_SHORT) { + p += 2; + GETSHORT(cishort, p); + printer(arg, "mru %d", cishort); + } + break; + case CI_ASYNCMAP: + if (olen == CILEN_LONG) { + p += 2; + GETLONG(cilong, p); + printer(arg, "asyncmap 0x%lx", cilong); + } + break; + case CI_AUTHTYPE: + if (olen >= CILEN_SHORT) { + p += 2; + printer(arg, "auth "); + GETSHORT(cishort, p); + switch (cishort) { + case PPP_PAP: + printer(arg, "pap"); + break; + case PPP_CHAP: + printer(arg, "chap"); + break; + default: + printer(arg, "0x%x", cishort); + } + } + break; + case CI_QUALITY: + if (olen >= CILEN_SHORT) { + p += 2; + printer(arg, "quality "); + GETSHORT(cishort, p); + switch (cishort) { + case PPP_LQR: + printer(arg, "lqr"); + break; + default: + printer(arg, "0x%x", cishort); + } + } + break; + case CI_CALLBACK: + if (olen >= CILEN_CHAR) { + p += 2; + printer(arg, "callback "); + GETSHORT(cishort, p); + switch (cishort) { + case CBCP_OPT: + printer(arg, "CBCP"); + break; + default: + printer(arg, "0x%x", cishort); + } + } + break; + case CI_MAGICNUMBER: + if (olen == CILEN_LONG) { + p += 2; + GETLONG(cilong, p); + printer(arg, "magic 0x%x", cilong); + } + break; + case CI_PCOMPRESSION: + if (olen == CILEN_VOID) { + p += 2; + printer(arg, "pcomp"); + } + break; + case CI_ACCOMPRESSION: + if (olen == CILEN_VOID) { + p += 2; + printer(arg, "accomp"); + } + break; + } + while (p < optend) { + GETCHAR(code, p); + printer(arg, " %.2x", code); + } + printer(arg, ">"); + } + break; + + case TERMACK: + case TERMREQ: + if (len > 0 && *p >= ' ' && *p < 0x7f) { + printer(arg, " "); + print_string((char*)p, len, printer, arg); + p += len; + len = 0; + } + break; + + case ECHOREQ: + case ECHOREP: + case DISCREQ: + if (len >= 4) { + GETLONG(cilong, p); + printer(arg, " magic=0x%x", cilong); + p += 4; + len -= 4; + } + break; + } + + /* print the rest of the bytes in the packet */ + for (; len > 0; --len) { + GETCHAR(code, p); + printer(arg, " %.2x", code); + } + + return (int)(p - pstart); +} +#endif + +/* + * Time to shut down the link because there is nothing out there. + */ + +static void LcpLinkFailure (fsm *f) +{ + if (f->state == OPENED) { + LCPDEBUG((LOG_INFO, "No response to %d echo-requests\n", lcp_echos_pending)); + LCPDEBUG((LOG_NOTICE, "Serial link appears to be disconnected.\n")); + lcp_close(f->unit, "Peer not responding"); + } +} + +/* + * Timer expired for the LCP echo requests from this process. + */ + +static void LcpEchoCheck (fsm *f) +{ + LcpSendEchoRequest (f); + + /* + * Start the timer for the next interval. + */ + LWIP_ASSERT("lcp_echo_timer_running == 0", lcp_echo_timer_running == 0); + + TIMEOUT (LcpEchoTimeout, f, lcp_echo_interval); + lcp_echo_timer_running = 1; +} + +/* + * LcpEchoTimeout - Timer expired on the LCP echo + */ + +static void LcpEchoTimeout (void *arg) +{ + if (lcp_echo_timer_running != 0) { + lcp_echo_timer_running = 0; + LcpEchoCheck ((fsm *) arg); + } +} + +/* + * LcpEchoReply - LCP has received a reply to the echo + */ +static void lcp_received_echo_reply (fsm *f, int id, u_char *inp, int len) +{ + u32_t magic; + + (void)id; + + /* Check the magic number - don't count replies from ourselves. */ + if (len < 4) { + LCPDEBUG((LOG_WARNING, "lcp: received short Echo-Reply, length %d\n", len)); + return; + } + GETLONG(magic, inp); + if (lcp_gotoptions[f->unit].neg_magicnumber + && magic == lcp_gotoptions[f->unit].magicnumber) { + LCPDEBUG((LOG_WARNING, "appear to have received our own echo-reply!\n")); + return; + } + + /* Reset the number of outstanding echo frames */ + lcp_echos_pending = 0; +} + +/* + * LcpSendEchoRequest - Send an echo request frame to the peer + */ + +static void LcpSendEchoRequest (fsm *f) +{ + u32_t lcp_magic; + u_char pkt[4], *pktp; + + /* + * Detect the failure of the peer at this point. + */ + if (lcp_echo_fails != 0) { + if (lcp_echos_pending++ >= lcp_echo_fails) { + LcpLinkFailure(f); + lcp_echos_pending = 0; + } + } + + /* + * Make and send the echo request frame. + */ + if (f->state == OPENED) { + lcp_magic = lcp_gotoptions[f->unit].magicnumber; + pktp = pkt; + PUTLONG(lcp_magic, pktp); + fsm_sdata(f, ECHOREQ, (u_char)(lcp_echo_number++ & 0xFF), pkt, (int)(pktp - pkt)); + } +} + +/* + * lcp_echo_lowerup - Start the timer for the LCP frame + */ + +static void lcp_echo_lowerup (int unit) +{ + fsm *f = &lcp_fsm[unit]; + + /* Clear the parameters for generating echo frames */ + lcp_echos_pending = 0; + lcp_echo_number = 0; + lcp_echo_timer_running = 0; + + /* If a timeout interval is specified then start the timer */ + if (lcp_echo_interval != 0) + LcpEchoCheck (f); +} + +/* + * lcp_echo_lowerdown - Stop the timer for the LCP frame + */ + +static void lcp_echo_lowerdown (int unit) +{ + fsm *f = &lcp_fsm[unit]; + + if (lcp_echo_timer_running != 0) { + UNTIMEOUT (LcpEchoTimeout, f); + lcp_echo_timer_running = 0; + } +} + +#endif /* PPP_SUPPORT */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/lcp.h @@ -0,0 +1,169 @@ +/***************************************************************************** +* lcp.h - Network Link Control Protocol header file. +* +* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. +* portions Copyright (c) 1997 Global Election Systems Inc. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY +* +* 03-01-01 Marc Boucher <marc@mbsi.ca> +* Ported to lwIP. +* 97-11-05 Guy Lancaster <glanca@gesn.com>, Global Election Systems Inc. +* Original derived from BSD codes. +*****************************************************************************/ +/* + * lcp.h - Link Control Protocol definitions. + * + * Copyright (c) 1989 Carnegie Mellon University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Carnegie Mellon University. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * $Id: lcp.h,v 1.1 2004/05/04 12:32:33 jani Exp $ + */ + +#ifndef LCP_H +#define LCP_H + + +/************************* +*** PUBLIC DEFINITIONS *** +*************************/ +/* + * Options. + */ +#define CI_MRU 1 /* Maximum Receive Unit */ +#define CI_ASYNCMAP 2 /* Async Control Character Map */ +#define CI_AUTHTYPE 3 /* Authentication Type */ +#define CI_QUALITY 4 /* Quality Protocol */ +#define CI_MAGICNUMBER 5 /* Magic Number */ +#define CI_PCOMPRESSION 7 /* Protocol Field Compression */ +#define CI_ACCOMPRESSION 8 /* Address/Control Field Compression */ +#define CI_CALLBACK 13 /* callback */ +#define CI_MRRU 17 /* max reconstructed receive unit; multilink */ +#define CI_SSNHF 18 /* short sequence numbers for multilink */ +#define CI_EPDISC 19 /* endpoint discriminator */ + +/* + * LCP-specific packet types. + */ +#define PROTREJ 8 /* Protocol Reject */ +#define ECHOREQ 9 /* Echo Request */ +#define ECHOREP 10 /* Echo Reply */ +#define DISCREQ 11 /* Discard Request */ +#define CBCP_OPT 6 /* Use callback control protocol */ + + +/************************ +*** PUBLIC DATA TYPES *** +************************/ + +/* + * The state of options is described by an lcp_options structure. + */ +typedef struct lcp_options { + u_int passive : 1; /* Don't die if we don't get a response */ + u_int silent : 1; /* Wait for the other end to start first */ + u_int restart : 1; /* Restart vs. exit after close */ + u_int neg_mru : 1; /* Negotiate the MRU? */ + u_int neg_asyncmap : 1; /* Negotiate the async map? */ + u_int neg_upap : 1; /* Ask for UPAP authentication? */ + u_int neg_chap : 1; /* Ask for CHAP authentication? */ + u_int neg_magicnumber : 1; /* Ask for magic number? */ + u_int neg_pcompression : 1; /* HDLC Protocol Field Compression? */ + u_int neg_accompression : 1; /* HDLC Address/Control Field Compression? */ + u_int neg_lqr : 1; /* Negotiate use of Link Quality Reports */ + u_int neg_cbcp : 1; /* Negotiate use of CBCP */ +#ifdef PPP_MULTILINK + u_int neg_mrru : 1; /* Negotiate multilink MRRU */ + u_int neg_ssnhf : 1; /* Negotiate short sequence numbers */ + u_int neg_endpoint : 1; /* Negotiate endpoint discriminator */ +#endif + u_short mru; /* Value of MRU */ +#ifdef PPP_MULTILINK + u_short mrru; /* Value of MRRU, and multilink enable */ +#endif + u_char chap_mdtype; /* which MD type (hashing algorithm) */ + u32_t asyncmap; /* Value of async map */ + u32_t magicnumber; + int numloops; /* Number of loops during magic number neg. */ + u32_t lqr_period; /* Reporting period for LQR 1/100ths second */ +#ifdef PPP_MULTILINK + struct epdisc endpoint; /* endpoint discriminator */ +#endif +} lcp_options; + +/* + * Values for phase from BSD pppd.h based on RFC 1661. + */ +typedef enum { + PHASE_DEAD = 0, + PHASE_INITIALIZE, + PHASE_ESTABLISH, + PHASE_AUTHENTICATE, + PHASE_CALLBACK, + PHASE_NETWORK, + PHASE_TERMINATE +} LinkPhase; + + +/***************************** +*** PUBLIC DATA STRUCTURES *** +*****************************/ + +extern LinkPhase lcp_phase[NUM_PPP]; /* Phase of link session (RFC 1661) */ +extern lcp_options lcp_wantoptions[]; +extern lcp_options lcp_gotoptions[]; +extern lcp_options lcp_allowoptions[]; +extern lcp_options lcp_hisoptions[]; +extern ext_accm xmit_accm[]; + + +/*********************** +*** PUBLIC FUNCTIONS *** +***********************/ + +void lcp_init (int); +void lcp_open (int); +void lcp_close (int, char *); +void lcp_lowerup (int); +void lcp_lowerdown (int); +void lcp_sprotrej (int, u_char *, int); /* send protocol reject */ + +extern struct protent lcp_protent; + +/* Default number of times we receive our magic number from the peer + before deciding the link is looped-back. */ +#define DEFLOOPBACKFAIL 10 + +#endif /* LCP_H */ +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/magic.c @@ -0,0 +1,79 @@ +/***************************************************************************** +* magic.c - Network Random Number Generator program file. +* +* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. +* portions Copyright (c) 1997 by Global Election Systems Inc. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY +* +* 03-01-01 Marc Boucher <marc@mbsi.ca> +* Ported to lwIP. +* 97-12-04 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc. +* Original based on BSD magic.c. +*****************************************************************************/ +/* + * magic.c - PPP Magic Number routines. + * + * Copyright (c) 1989 Carnegie Mellon University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Carnegie Mellon University. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +#include "ppp.h" +#include "randm.h" +#include "magic.h" + + +/***********************************/ +/*** PUBLIC FUNCTION DEFINITIONS ***/ +/***********************************/ +/* + * magicInit - Initialize the magic number generator. + * + * Since we use another random number generator that has its own + * initialization, we do nothing here. + */ +void magicInit() +{ + return; +} + +/* + * magic - Returns the next magic number. + */ +u32_t magic() +{ + return avRandom(); +} + +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/magic.h @@ -0,0 +1,64 @@ +/***************************************************************************** +* magic.h - Network Random Number Generator header file. +* +* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. +* portions Copyright (c) 1997 Global Election Systems Inc. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY +* +* 03-01-01 Marc Boucher <marc@mbsi.ca> +* Ported to lwIP. +* 97-12-04 Guy Lancaster <glanca@gesn.com>, Global Election Systems Inc. +* Original derived from BSD codes. +*****************************************************************************/ +/* + * magic.h - PPP Magic Number definitions. + * + * Copyright (c) 1989 Carnegie Mellon University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Carnegie Mellon University. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * $Id: magic.h,v 1.1 2004/05/04 12:32:33 jani Exp $ + */ + +#ifndef MAGIC_H +#define MAGIC_H + +/***************************************************************************** +************************** PUBLIC FUNCTIONS ********************************** +*****************************************************************************/ + +void magicInit(void); /* Initialize the magic number generator */ +u32_t magic(void); /* Returns the next magic number */ + +#endif /* MAGIC_H */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/md5.c @@ -0,0 +1,306 @@ +/* + *********************************************************************** + ** md5.c -- the source code for MD5 routines ** + ** RSA Data Security, Inc. MD5 Message-Digest Algorithm ** + ** Created: 2/17/90 RLR ** + ** Revised: 1/91 SRD,AJ,BSK,JT Reference C ver., 7/10 constant corr. ** + *********************************************************************** + */ + +/* + *********************************************************************** + ** Copyright (C) 1990, RSA Data Security, Inc. All rights reserved. ** + ** ** + ** License to copy and use this software is granted provided that ** + ** it is identified as the "RSA Data Security, Inc. MD5 Message- ** + ** Digest Algorithm" in all material mentioning or referencing this ** + ** software or this function. ** + ** ** + ** License is also granted to make and use derivative works ** + ** provided that such works are identified as "derived from the RSA ** + ** Data Security, Inc. MD5 Message-Digest Algorithm" in all ** + ** material mentioning or referencing the derived work. ** + ** ** + ** RSA Data Security, Inc. makes no representations concerning ** + ** either the merchantability of this software or the suitability ** + ** of this software for any particular purpose. It is provided "as ** + ** is" without express or implied warranty of any kind. ** + ** ** + ** These notices must be retained in any copies of any part of this ** + ** documentation and/or software. ** + *********************************************************************** + */ + +#include "ppp.h" +#include "md5.h" +#include "pppdebug.h" + +#if CHAP_SUPPORT > 0 || MD5_SUPPORT > 0 + +/* + *********************************************************************** + ** Message-digest routines: ** + ** To form the message digest for a message M ** + ** (1) Initialize a context buffer mdContext using MD5Init ** + ** (2) Call MD5Update on mdContext and M ** + ** (3) Call MD5Final on mdContext ** + ** The message digest is now in mdContext->digest[0...15] ** + *********************************************************************** + */ + +/* forward declaration */ +static void Transform (u32_t *buf, u32_t *in); + +static unsigned char PADDING[64] = { + 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 +}; + +/* F, G, H and I are basic MD5 functions */ +#define F(x, y, z) (((x) & (y)) | ((~x) & (z))) +#define G(x, y, z) (((x) & (z)) | ((y) & (~z))) +#define H(x, y, z) ((x) ^ (y) ^ (z)) +#define I(x, y, z) ((y) ^ ((x) | (~z))) + +/* ROTATE_LEFT rotates x left n bits */ +#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n)))) + +/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4 */ +/* Rotation is separate from addition to prevent recomputation */ +#define FF(a, b, c, d, x, s, ac) \ + {(a) += F ((b), (c), (d)) + (x) + (u32_t)(ac); \ + (a) = ROTATE_LEFT ((a), (s)); \ + (a) += (b); \ + } +#define GG(a, b, c, d, x, s, ac) \ + {(a) += G ((b), (c), (d)) + (x) + (u32_t)(ac); \ + (a) = ROTATE_LEFT ((a), (s)); \ + (a) += (b); \ + } +#define HH(a, b, c, d, x, s, ac) \ + {(a) += H ((b), (c), (d)) + (x) + (u32_t)(ac); \ + (a) = ROTATE_LEFT ((a), (s)); \ + (a) += (b); \ + } +#define II(a, b, c, d, x, s, ac) \ + {(a) += I ((b), (c), (d)) + (x) + (u32_t)(ac); \ + (a) = ROTATE_LEFT ((a), (s)); \ + (a) += (b); \ + } + +#ifdef __STDC__ +#define UL(x) x##UL +#else +#ifdef WIN32 +#define UL(x) x##UL +#else +#define UL(x) x +#endif +#endif + +/* The routine MD5Init initializes the message-digest context + mdContext. All fields are set to zero. + */ +void MD5Init (MD5_CTX *mdContext) +{ + mdContext->i[0] = mdContext->i[1] = (u32_t)0; + + /* Load magic initialization constants. + */ + mdContext->buf[0] = (u32_t)0x67452301UL; + mdContext->buf[1] = (u32_t)0xefcdab89UL; + mdContext->buf[2] = (u32_t)0x98badcfeUL; + mdContext->buf[3] = (u32_t)0x10325476UL; +} + +/* The routine MD5Update updates the message-digest context to + account for the presence of each of the characters inBuf[0..inLen-1] + in the message whose digest is being computed. + */ +void MD5Update(MD5_CTX *mdContext, unsigned char *inBuf, unsigned int inLen) +{ + u32_t in[16]; + int mdi; + unsigned int i, ii; + +#if 0 + ppp_trace(LOG_INFO, "MD5Update: %u:%.*H\n", inLen, MIN(inLen, 20) * 2, inBuf); + ppp_trace(LOG_INFO, "MD5Update: %u:%s\n", inLen, inBuf); +#endif + + /* compute number of bytes mod 64 */ + mdi = (int)((mdContext->i[0] >> 3) & 0x3F); + + /* update number of bits */ + if ((mdContext->i[0] + ((u32_t)inLen << 3)) < mdContext->i[0]) + mdContext->i[1]++; + mdContext->i[0] += ((u32_t)inLen << 3); + mdContext->i[1] += ((u32_t)inLen >> 29); + + while (inLen--) { + /* add new character to buffer, increment mdi */ + mdContext->in[mdi++] = *inBuf++; + + /* transform if necessary */ + if (mdi == 0x40) { + for (i = 0, ii = 0; i < 16; i++, ii += 4) + in[i] = (((u32_t)mdContext->in[ii+3]) << 24) | + (((u32_t)mdContext->in[ii+2]) << 16) | + (((u32_t)mdContext->in[ii+1]) << 8) | + ((u32_t)mdContext->in[ii]); + Transform (mdContext->buf, in); + mdi = 0; + } + } +} + +/* The routine MD5Final terminates the message-digest computation and + ends with the desired message digest in mdContext->digest[0...15]. + */ +void MD5Final (unsigned char hash[], MD5_CTX *mdContext) +{ + u32_t in[16]; + int mdi; + unsigned int i, ii; + unsigned int padLen; + + /* save number of bits */ + in[14] = mdContext->i[0]; + in[15] = mdContext->i[1]; + + /* compute number of bytes mod 64 */ + mdi = (int)((mdContext->i[0] >> 3) & 0x3F); + + /* pad out to 56 mod 64 */ + padLen = (mdi < 56) ? (56 - mdi) : (120 - mdi); + MD5Update (mdContext, PADDING, padLen); + + /* append length in bits and transform */ + for (i = 0, ii = 0; i < 14; i++, ii += 4) + in[i] = (((u32_t)mdContext->in[ii+3]) << 24) | + (((u32_t)mdContext->in[ii+2]) << 16) | + (((u32_t)mdContext->in[ii+1]) << 8) | + ((u32_t)mdContext->in[ii]); + Transform (mdContext->buf, in); + + /* store buffer in digest */ + for (i = 0, ii = 0; i < 4; i++, ii += 4) { + mdContext->digest[ii] = (unsigned char)(mdContext->buf[i] & 0xFF); + mdContext->digest[ii+1] = + (unsigned char)((mdContext->buf[i] >> 8) & 0xFF); + mdContext->digest[ii+2] = + (unsigned char)((mdContext->buf[i] >> 16) & 0xFF); + mdContext->digest[ii+3] = + (unsigned char)((mdContext->buf[i] >> 24) & 0xFF); + } + memcpy(hash, mdContext->digest, 16); +} + +/* Basic MD5 step. Transforms buf based on in. + */ +static void Transform (u32_t *buf, u32_t *in) +{ + u32_t a = buf[0], b = buf[1], c = buf[2], d = buf[3]; + + /* Round 1 */ +#define S11 7 +#define S12 12 +#define S13 17 +#define S14 22 + FF ( a, b, c, d, in[ 0], S11, UL(3614090360)); /* 1 */ + FF ( d, a, b, c, in[ 1], S12, UL(3905402710)); /* 2 */ + FF ( c, d, a, b, in[ 2], S13, UL( 606105819)); /* 3 */ + FF ( b, c, d, a, in[ 3], S14, UL(3250441966)); /* 4 */ + FF ( a, b, c, d, in[ 4], S11, UL(4118548399)); /* 5 */ + FF ( d, a, b, c, in[ 5], S12, UL(1200080426)); /* 6 */ + FF ( c, d, a, b, in[ 6], S13, UL(2821735955)); /* 7 */ + FF ( b, c, d, a, in[ 7], S14, UL(4249261313)); /* 8 */ + FF ( a, b, c, d, in[ 8], S11, UL(1770035416)); /* 9 */ + FF ( d, a, b, c, in[ 9], S12, UL(2336552879)); /* 10 */ + FF ( c, d, a, b, in[10], S13, UL(4294925233)); /* 11 */ + FF ( b, c, d, a, in[11], S14, UL(2304563134)); /* 12 */ + FF ( a, b, c, d, in[12], S11, UL(1804603682)); /* 13 */ + FF ( d, a, b, c, in[13], S12, UL(4254626195)); /* 14 */ + FF ( c, d, a, b, in[14], S13, UL(2792965006)); /* 15 */ + FF ( b, c, d, a, in[15], S14, UL(1236535329)); /* 16 */ + + /* Round 2 */ +#define S21 5 +#define S22 9 +#define S23 14 +#define S24 20 + GG ( a, b, c, d, in[ 1], S21, UL(4129170786)); /* 17 */ + GG ( d, a, b, c, in[ 6], S22, UL(3225465664)); /* 18 */ + GG ( c, d, a, b, in[11], S23, UL( 643717713)); /* 19 */ + GG ( b, c, d, a, in[ 0], S24, UL(3921069994)); /* 20 */ + GG ( a, b, c, d, in[ 5], S21, UL(3593408605)); /* 21 */ + GG ( d, a, b, c, in[10], S22, UL( 38016083)); /* 22 */ + GG ( c, d, a, b, in[15], S23, UL(3634488961)); /* 23 */ + GG ( b, c, d, a, in[ 4], S24, UL(3889429448)); /* 24 */ + GG ( a, b, c, d, in[ 9], S21, UL( 568446438)); /* 25 */ + GG ( d, a, b, c, in[14], S22, UL(3275163606)); /* 26 */ + GG ( c, d, a, b, in[ 3], S23, UL(4107603335)); /* 27 */ + GG ( b, c, d, a, in[ 8], S24, UL(1163531501)); /* 28 */ + GG ( a, b, c, d, in[13], S21, UL(2850285829)); /* 29 */ + GG ( d, a, b, c, in[ 2], S22, UL(4243563512)); /* 30 */ + GG ( c, d, a, b, in[ 7], S23, UL(1735328473)); /* 31 */ + GG ( b, c, d, a, in[12], S24, UL(2368359562)); /* 32 */ + + /* Round 3 */ +#define S31 4 +#define S32 11 +#define S33 16 +#define S34 23 + HH ( a, b, c, d, in[ 5], S31, UL(4294588738)); /* 33 */ + HH ( d, a, b, c, in[ 8], S32, UL(2272392833)); /* 34 */ + HH ( c, d, a, b, in[11], S33, UL(1839030562)); /* 35 */ + HH ( b, c, d, a, in[14], S34, UL(4259657740)); /* 36 */ + HH ( a, b, c, d, in[ 1], S31, UL(2763975236)); /* 37 */ + HH ( d, a, b, c, in[ 4], S32, UL(1272893353)); /* 38 */ + HH ( c, d, a, b, in[ 7], S33, UL(4139469664)); /* 39 */ + HH ( b, c, d, a, in[10], S34, UL(3200236656)); /* 40 */ + HH ( a, b, c, d, in[13], S31, UL( 681279174)); /* 41 */ + HH ( d, a, b, c, in[ 0], S32, UL(3936430074)); /* 42 */ + HH ( c, d, a, b, in[ 3], S33, UL(3572445317)); /* 43 */ + HH ( b, c, d, a, in[ 6], S34, UL( 76029189)); /* 44 */ + HH ( a, b, c, d, in[ 9], S31, UL(3654602809)); /* 45 */ + HH ( d, a, b, c, in[12], S32, UL(3873151461)); /* 46 */ + HH ( c, d, a, b, in[15], S33, UL( 530742520)); /* 47 */ + HH ( b, c, d, a, in[ 2], S34, UL(3299628645)); /* 48 */ + + /* Round 4 */ +#define S41 6 +#define S42 10 +#define S43 15 +#define S44 21 + II ( a, b, c, d, in[ 0], S41, UL(4096336452)); /* 49 */ + II ( d, a, b, c, in[ 7], S42, UL(1126891415)); /* 50 */ + II ( c, d, a, b, in[14], S43, UL(2878612391)); /* 51 */ + II ( b, c, d, a, in[ 5], S44, UL(4237533241)); /* 52 */ + II ( a, b, c, d, in[12], S41, UL(1700485571)); /* 53 */ + II ( d, a, b, c, in[ 3], S42, UL(2399980690)); /* 54 */ + II ( c, d, a, b, in[10], S43, UL(4293915773)); /* 55 */ + II ( b, c, d, a, in[ 1], S44, UL(2240044497)); /* 56 */ + II ( a, b, c, d, in[ 8], S41, UL(1873313359)); /* 57 */ + II ( d, a, b, c, in[15], S42, UL(4264355552)); /* 58 */ + II ( c, d, a, b, in[ 6], S43, UL(2734768916)); /* 59 */ + II ( b, c, d, a, in[13], S44, UL(1309151649)); /* 60 */ + II ( a, b, c, d, in[ 4], S41, UL(4149444226)); /* 61 */ + II ( d, a, b, c, in[11], S42, UL(3174756917)); /* 62 */ + II ( c, d, a, b, in[ 2], S43, UL( 718787259)); /* 63 */ + II ( b, c, d, a, in[ 9], S44, UL(3951481745)); /* 64 */ + + buf[0] += a; + buf[1] += b; + buf[2] += c; + buf[3] += d; +} + +#endif +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/md5.h @@ -0,0 +1,55 @@ +/* + *********************************************************************** + ** md5.h -- header file for implementation of MD5 ** + ** RSA Data Security, Inc. MD5 Message-Digest Algorithm ** + ** Created: 2/17/90 RLR ** + ** Revised: 12/27/90 SRD,AJ,BSK,JT Reference C version ** + ** Revised (for MD5): RLR 4/27/91 ** + ** -- G modified to have y&~z instead of y&z ** + ** -- FF, GG, HH modified to add in last register done ** + ** -- Access pattern: round 2 works mod 5, round 3 works mod 3 ** + ** -- distinct additive constant for each step ** + ** -- round 4 added, working mod 7 ** + *********************************************************************** + */ + +/* + *********************************************************************** + ** Copyright (C) 1990, RSA Data Security, Inc. All rights reserved. ** + ** ** + ** License to copy and use this software is granted provided that ** + ** it is identified as the "RSA Data Security, Inc. MD5 Message- ** + ** Digest Algorithm" in all material mentioning or referencing this ** + ** software or this function. ** + ** ** + ** License is also granted to make and use derivative works ** + ** provided that such works are identified as "derived from the RSA ** + ** Data Security, Inc. MD5 Message-Digest Algorithm" in all ** + ** material mentioning or referencing the derived work. ** + ** ** + ** RSA Data Security, Inc. makes no representations concerning ** + ** either the merchantability of this software or the suitability ** + ** of this software for any particular purpose. It is provided "as ** + ** is" without express or implied warranty of any kind. ** + ** ** + ** These notices must be retained in any copies of any part of this ** + ** documentation and/or software. ** + *********************************************************************** + */ + +#ifndef MD5_H +#define MD5_H + +/* Data structure for MD5 (Message-Digest) computation */ +typedef struct { + u32_t i[2]; /* number of _bits_ handled mod 2^64 */ + u32_t buf[4]; /* scratch buffer */ + unsigned char in[64]; /* input buffer */ + unsigned char digest[16]; /* actual digest after MD5Final call */ +} MD5_CTX; + +void MD5Init (MD5_CTX *mdContext); +void MD5Update (MD5_CTX *mdContext, unsigned char *inBuf, unsigned int inLen); +void MD5Final (unsigned char hash[], MD5_CTX *mdContext); + +#endif /* MD5_H */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/pap.c @@ -0,0 +1,608 @@ +/***************************************************************************** +* pap.c - Network Password Authentication Protocol program file. +* +* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. +* portions Copyright (c) 1997 by Global Election Systems Inc. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY +* +* 03-01-01 Marc Boucher <marc@mbsi.ca> +* Ported to lwIP. +* 97-12-12 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc. +* Original. +*****************************************************************************/ +/* + * upap.c - User/Password Authentication Protocol. + * + * Copyright (c) 1989 Carnegie Mellon University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Carnegie Mellon University. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +#include "ppp.h" +#include "auth.h" +#include "pap.h" +#include "pppdebug.h" + + +#if PAP_SUPPORT > 0 + +/***********************************/ +/*** LOCAL FUNCTION DECLARATIONS ***/ +/***********************************/ +/* + * Protocol entry points. + */ +static void upap_init (int); +static void upap_lowerup (int); +static void upap_lowerdown (int); +static void upap_input (int, u_char *, int); +static void upap_protrej (int); + +static void upap_timeout (void *); +static void upap_reqtimeout (void *); +static void upap_rauthreq (upap_state *, u_char *, int, int); +static void upap_rauthack (upap_state *, u_char *, int, int); +static void upap_rauthnak (upap_state *, u_char *, int, int); +static void upap_sauthreq (upap_state *); +static void upap_sresp (upap_state *, u_char, u_char, char *, int); + + + + +/******************************/ +/*** PUBLIC DATA STRUCTURES ***/ +/******************************/ +struct protent pap_protent = { + PPP_PAP, + upap_init, + upap_input, + upap_protrej, + upap_lowerup, + upap_lowerdown, + NULL, + NULL, +#if 0 + upap_printpkt, + NULL, +#endif + 1, + "PAP", +#if 0 + NULL, + NULL, + NULL +#endif +}; + +upap_state upap[NUM_PPP]; /* UPAP state; one for each unit */ + + + +/***********************************/ +/*** PUBLIC FUNCTION DEFINITIONS ***/ +/***********************************/ +/* + * Set the default login name and password for the pap sessions + */ +void upap_setloginpasswd(int unit, const char *luser, const char *lpassword) +{ + upap_state *u = &upap[unit]; + + /* Save the username and password we're given */ + u->us_user = luser; + u->us_userlen = strlen(luser); + u->us_passwd = lpassword; + u->us_passwdlen = strlen(lpassword); +} + + +/* + * upap_authwithpeer - Authenticate us with our peer (start client). + * + * Set new state and send authenticate's. + */ +void upap_authwithpeer(int unit, char *user, char *password) +{ + upap_state *u = &upap[unit]; + + UPAPDEBUG((LOG_INFO, "upap_authwithpeer: %d user=%s password=%s s=%d\n", + unit, user, password, u->us_clientstate)); + + upap_setloginpasswd(unit, user, password); + + u->us_transmits = 0; + + /* Lower layer up yet? */ + if (u->us_clientstate == UPAPCS_INITIAL || + u->us_clientstate == UPAPCS_PENDING) { + u->us_clientstate = UPAPCS_PENDING; + return; + } + + upap_sauthreq(u); /* Start protocol */ +} + + +/* + * upap_authpeer - Authenticate our peer (start server). + * + * Set new state. + */ +void upap_authpeer(int unit) +{ + upap_state *u = &upap[unit]; + + /* Lower layer up yet? */ + if (u->us_serverstate == UPAPSS_INITIAL || + u->us_serverstate == UPAPSS_PENDING) { + u->us_serverstate = UPAPSS_PENDING; + return; + } + + u->us_serverstate = UPAPSS_LISTEN; + if (u->us_reqtimeout > 0) + TIMEOUT(upap_reqtimeout, u, u->us_reqtimeout); +} + + + +/**********************************/ +/*** LOCAL FUNCTION DEFINITIONS ***/ +/**********************************/ +/* + * upap_init - Initialize a UPAP unit. + */ +static void upap_init(int unit) +{ + upap_state *u = &upap[unit]; + + UPAPDEBUG((LOG_INFO, "upap_init: %d\n", unit)); + u->us_unit = unit; + u->us_user = NULL; + u->us_userlen = 0; + u->us_passwd = NULL; + u->us_passwdlen = 0; + u->us_clientstate = UPAPCS_INITIAL; + u->us_serverstate = UPAPSS_INITIAL; + u->us_id = 0; + u->us_timeouttime = UPAP_DEFTIMEOUT; + u->us_maxtransmits = 10; + u->us_reqtimeout = UPAP_DEFREQTIME; +} + +/* + * upap_timeout - Retransmission timer for sending auth-reqs expired. + */ +static void upap_timeout(void *arg) +{ + upap_state *u = (upap_state *) arg; + + UPAPDEBUG((LOG_INFO, "upap_timeout: %d timeout %d expired s=%d\n", + u->us_unit, u->us_timeouttime, u->us_clientstate)); + + if (u->us_clientstate != UPAPCS_AUTHREQ) + return; + + if (u->us_transmits >= u->us_maxtransmits) { + /* give up in disgust */ + UPAPDEBUG((LOG_ERR, "No response to PAP authenticate-requests\n")); + u->us_clientstate = UPAPCS_BADAUTH; + auth_withpeer_fail(u->us_unit, PPP_PAP); + return; + } + + upap_sauthreq(u); /* Send Authenticate-Request */ +} + + +/* + * upap_reqtimeout - Give up waiting for the peer to send an auth-req. + */ +static void upap_reqtimeout(void *arg) +{ + upap_state *u = (upap_state *) arg; + + if (u->us_serverstate != UPAPSS_LISTEN) + return; /* huh?? */ + + auth_peer_fail(u->us_unit, PPP_PAP); + u->us_serverstate = UPAPSS_BADAUTH; +} + + +/* + * upap_lowerup - The lower layer is up. + * + * Start authenticating if pending. + */ +static void upap_lowerup(int unit) +{ + upap_state *u = &upap[unit]; + + UPAPDEBUG((LOG_INFO, "upap_lowerup: %d s=%d\n", unit, u->us_clientstate)); + + if (u->us_clientstate == UPAPCS_INITIAL) + u->us_clientstate = UPAPCS_CLOSED; + else if (u->us_clientstate == UPAPCS_PENDING) { + upap_sauthreq(u); /* send an auth-request */ + } + + if (u->us_serverstate == UPAPSS_INITIAL) + u->us_serverstate = UPAPSS_CLOSED; + else if (u->us_serverstate == UPAPSS_PENDING) { + u->us_serverstate = UPAPSS_LISTEN; + if (u->us_reqtimeout > 0) + TIMEOUT(upap_reqtimeout, u, u->us_reqtimeout); + } +} + + +/* + * upap_lowerdown - The lower layer is down. + * + * Cancel all timeouts. + */ +static void upap_lowerdown(int unit) +{ + upap_state *u = &upap[unit]; + + UPAPDEBUG((LOG_INFO, "upap_lowerdown: %d s=%d\n", unit, u->us_clientstate)); + + if (u->us_clientstate == UPAPCS_AUTHREQ) /* Timeout pending? */ + UNTIMEOUT(upap_timeout, u); /* Cancel timeout */ + if (u->us_serverstate == UPAPSS_LISTEN && u->us_reqtimeout > 0) + UNTIMEOUT(upap_reqtimeout, u); + + u->us_clientstate = UPAPCS_INITIAL; + u->us_serverstate = UPAPSS_INITIAL; +} + + +/* + * upap_protrej - Peer doesn't speak this protocol. + * + * This shouldn't happen. In any case, pretend lower layer went down. + */ +static void upap_protrej(int unit) +{ + upap_state *u = &upap[unit]; + + if (u->us_clientstate == UPAPCS_AUTHREQ) { + UPAPDEBUG((LOG_ERR, "PAP authentication failed due to protocol-reject\n")); + auth_withpeer_fail(unit, PPP_PAP); + } + if (u->us_serverstate == UPAPSS_LISTEN) { + UPAPDEBUG((LOG_ERR, "PAP authentication of peer failed (protocol-reject)\n")); + auth_peer_fail(unit, PPP_PAP); + } + upap_lowerdown(unit); +} + + +/* + * upap_input - Input UPAP packet. + */ +static void upap_input(int unit, u_char *inpacket, int l) +{ + upap_state *u = &upap[unit]; + u_char *inp; + u_char code, id; + int len; + + /* + * Parse header (code, id and length). + * If packet too short, drop it. + */ + inp = inpacket; + if (l < UPAP_HEADERLEN) { + UPAPDEBUG((LOG_INFO, "pap_input: rcvd short header.\n")); + return; + } + GETCHAR(code, inp); + GETCHAR(id, inp); + GETSHORT(len, inp); + if (len < UPAP_HEADERLEN) { + UPAPDEBUG((LOG_INFO, "pap_input: rcvd illegal length.\n")); + return; + } + if (len > l) { + UPAPDEBUG((LOG_INFO, "pap_input: rcvd short packet.\n")); + return; + } + len -= UPAP_HEADERLEN; + + /* + * Action depends on code. + */ + switch (code) { + case UPAP_AUTHREQ: + upap_rauthreq(u, inp, id, len); + break; + + case UPAP_AUTHACK: + upap_rauthack(u, inp, id, len); + break; + + case UPAP_AUTHNAK: + upap_rauthnak(u, inp, id, len); + break; + + default: /* XXX Need code reject */ + break; + } +} + + +/* + * upap_rauth - Receive Authenticate. + */ +static void upap_rauthreq( + upap_state *u, + u_char *inp, + int id, + int len +) +{ + u_char ruserlen, rpasswdlen; + char *ruser, *rpasswd; + int retcode; + char *msg; + int msglen; + + UPAPDEBUG((LOG_INFO, "pap_rauth: Rcvd id %d.\n", id)); + + if (u->us_serverstate < UPAPSS_LISTEN) + return; + + /* + * If we receive a duplicate authenticate-request, we are + * supposed to return the same status as for the first request. + */ + if (u->us_serverstate == UPAPSS_OPEN) { + upap_sresp(u, UPAP_AUTHACK, id, "", 0); /* return auth-ack */ + return; + } + if (u->us_serverstate == UPAPSS_BADAUTH) { + upap_sresp(u, UPAP_AUTHNAK, id, "", 0); /* return auth-nak */ + return; + } + + /* + * Parse user/passwd. + */ + if (len < sizeof (u_char)) { + UPAPDEBUG((LOG_INFO, "pap_rauth: rcvd short packet.\n")); + return; + } + GETCHAR(ruserlen, inp); + len -= sizeof (u_char) + ruserlen + sizeof (u_char); + if (len < 0) { + UPAPDEBUG((LOG_INFO, "pap_rauth: rcvd short packet.\n")); + return; + } + ruser = (char *) inp; + INCPTR(ruserlen, inp); + GETCHAR(rpasswdlen, inp); + if (len < rpasswdlen) { + UPAPDEBUG((LOG_INFO, "pap_rauth: rcvd short packet.\n")); + return; + } + rpasswd = (char *) inp; + + /* + * Check the username and password given. + */ + retcode = check_passwd(u->us_unit, ruser, ruserlen, rpasswd, + rpasswdlen, &msg, &msglen); + BZERO(rpasswd, rpasswdlen); + + upap_sresp(u, retcode, id, msg, msglen); + + if (retcode == UPAP_AUTHACK) { + u->us_serverstate = UPAPSS_OPEN; + auth_peer_success(u->us_unit, PPP_PAP, ruser, ruserlen); + } else { + u->us_serverstate = UPAPSS_BADAUTH; + auth_peer_fail(u->us_unit, PPP_PAP); + } + + if (u->us_reqtimeout > 0) + UNTIMEOUT(upap_reqtimeout, u); +} + + +/* + * upap_rauthack - Receive Authenticate-Ack. + */ +static void upap_rauthack( + upap_state *u, + u_char *inp, + int id, + int len +) +{ + u_char msglen; + char *msg; + + UPAPDEBUG((LOG_INFO, "pap_rauthack: Rcvd id %d s=%d\n", id, u->us_clientstate)); + + if (u->us_clientstate != UPAPCS_AUTHREQ) /* XXX */ + return; + + /* + * Parse message. + */ + if (len < sizeof (u_char)) { + UPAPDEBUG((LOG_INFO, "pap_rauthack: rcvd short packet.\n")); + return; + } + GETCHAR(msglen, inp); + len -= sizeof (u_char); + if (len < msglen) { + UPAPDEBUG((LOG_INFO, "pap_rauthack: rcvd short packet.\n")); + return; + } + msg = (char *) inp; + PRINTMSG(msg, msglen); + + u->us_clientstate = UPAPCS_OPEN; + + auth_withpeer_success(u->us_unit, PPP_PAP); +} + + +/* + * upap_rauthnak - Receive Authenticate-Nakk. + */ +static void upap_rauthnak( + upap_state *u, + u_char *inp, + int id, + int len +) +{ + u_char msglen; + char *msg; + + UPAPDEBUG((LOG_INFO, "pap_rauthnak: Rcvd id %d s=%d\n", id, u->us_clientstate)); + + if (u->us_clientstate != UPAPCS_AUTHREQ) /* XXX */ + return; + + /* + * Parse message. + */ + if (len < sizeof (u_char)) { + UPAPDEBUG((LOG_INFO, "pap_rauthnak: rcvd short packet.\n")); + return; + } + GETCHAR(msglen, inp); + len -= sizeof (u_char); + if (len < msglen) { + UPAPDEBUG((LOG_INFO, "pap_rauthnak: rcvd short packet.\n")); + return; + } + msg = (char *) inp; + PRINTMSG(msg, msglen); + + u->us_clientstate = UPAPCS_BADAUTH; + + UPAPDEBUG((LOG_ERR, "PAP authentication failed\n")); + auth_withpeer_fail(u->us_unit, PPP_PAP); +} + + +/* + * upap_sauthreq - Send an Authenticate-Request. + */ +static void upap_sauthreq(upap_state *u) +{ + u_char *outp; + int outlen; + + outlen = UPAP_HEADERLEN + 2 * sizeof (u_char) + + u->us_userlen + u->us_passwdlen; + outp = outpacket_buf[u->us_unit]; + + MAKEHEADER(outp, PPP_PAP); + + PUTCHAR(UPAP_AUTHREQ, outp); + PUTCHAR(++u->us_id, outp); + PUTSHORT(outlen, outp); + PUTCHAR(u->us_userlen, outp); + BCOPY(u->us_user, outp, u->us_userlen); + INCPTR(u->us_userlen, outp); + PUTCHAR(u->us_passwdlen, outp); + BCOPY(u->us_passwd, outp, u->us_passwdlen); + + pppWrite(u->us_unit, outpacket_buf[u->us_unit], outlen + PPP_HDRLEN); + + UPAPDEBUG((LOG_INFO, "pap_sauth: Sent id %d\n", u->us_id)); + + TIMEOUT(upap_timeout, u, u->us_timeouttime); + ++u->us_transmits; + u->us_clientstate = UPAPCS_AUTHREQ; +} + + +/* + * upap_sresp - Send a response (ack or nak). + */ +static void upap_sresp( + upap_state *u, + u_char code, + u_char id, + char *msg, + int msglen +) +{ + u_char *outp; + int outlen; + + outlen = UPAP_HEADERLEN + sizeof (u_char) + msglen; + outp = outpacket_buf[u->us_unit]; + MAKEHEADER(outp, PPP_PAP); + + PUTCHAR(code, outp); + PUTCHAR(id, outp); + PUTSHORT(outlen, outp); + PUTCHAR(msglen, outp); + BCOPY(msg, outp, msglen); + pppWrite(u->us_unit, outpacket_buf[u->us_unit], outlen + PPP_HDRLEN); + + UPAPDEBUG((LOG_INFO, "pap_sresp: Sent code %d, id %d s=%d\n", + code, id, u->us_clientstate)); +} + +#if 0 +/* + * upap_printpkt - print the contents of a PAP packet. + */ +static int upap_printpkt( + u_char *p, + int plen, + void (*printer) (void *, char *, ...), + void *arg +) +{ + (void)p; + (void)plen; + (void)printer; + (void)arg; + return 0; +} +#endif + +#endif /* PAP_SUPPORT */ +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/pap.h @@ -0,0 +1,129 @@ +/***************************************************************************** +* pap.h - PPP Password Authentication Protocol header file. +* +* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. +* portions Copyright (c) 1997 Global Election Systems Inc. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY +* +* 03-01-01 Marc Boucher <marc@mbsi.ca> +* Ported to lwIP. +* 97-12-04 Guy Lancaster <glanca@gesn.com>, Global Election Systems Inc. +* Original derived from BSD codes. +*****************************************************************************/ +/* + * upap.h - User/Password Authentication Protocol definitions. + * + * Copyright (c) 1989 Carnegie Mellon University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Carnegie Mellon University. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + + +#ifndef PAP_H +#define PAP_H + +/************************* +*** PUBLIC DEFINITIONS *** +*************************/ +/* + * Packet header = Code, id, length. + */ +#define UPAP_HEADERLEN (sizeof (u_char) + sizeof (u_char) + sizeof (u_short)) + + +/* + * UPAP codes. + */ +#define UPAP_AUTHREQ 1 /* Authenticate-Request */ +#define UPAP_AUTHACK 2 /* Authenticate-Ack */ +#define UPAP_AUTHNAK 3 /* Authenticate-Nak */ + +/* + * Client states. + */ +#define UPAPCS_INITIAL 0 /* Connection down */ +#define UPAPCS_CLOSED 1 /* Connection up, haven't requested auth */ +#define UPAPCS_PENDING 2 /* Connection down, have requested auth */ +#define UPAPCS_AUTHREQ 3 /* We've sent an Authenticate-Request */ +#define UPAPCS_OPEN 4 /* We've received an Ack */ +#define UPAPCS_BADAUTH 5 /* We've received a Nak */ + +/* + * Server states. + */ +#define UPAPSS_INITIAL 0 /* Connection down */ +#define UPAPSS_CLOSED 1 /* Connection up, haven't requested auth */ +#define UPAPSS_PENDING 2 /* Connection down, have requested auth */ +#define UPAPSS_LISTEN 3 /* Listening for an Authenticate */ +#define UPAPSS_OPEN 4 /* We've sent an Ack */ +#define UPAPSS_BADAUTH 5 /* We've sent a Nak */ + + +/************************ +*** PUBLIC DATA TYPES *** +************************/ + +/* + * Each interface is described by upap structure. + */ +typedef struct upap_state { + int us_unit; /* Interface unit number */ + const char *us_user; /* User */ + int us_userlen; /* User length */ + const char *us_passwd; /* Password */ + int us_passwdlen; /* Password length */ + int us_clientstate; /* Client state */ + int us_serverstate; /* Server state */ + u_char us_id; /* Current id */ + int us_timeouttime; /* Timeout (seconds) for auth-req retrans. */ + int us_transmits; /* Number of auth-reqs sent */ + int us_maxtransmits; /* Maximum number of auth-reqs to send */ + int us_reqtimeout; /* Time to wait for auth-req from peer */ +} upap_state; + + +/*********************** +*** PUBLIC FUNCTIONS *** +***********************/ + +extern upap_state upap[]; + +void upap_setloginpasswd(int unit, const char *luser, const char *lpassword); +void upap_authwithpeer (int, char *, char *); +void upap_authpeer (int); + +extern struct protent pap_protent; + +#endif /* PAP_H */ +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/ppp.c @@ -0,0 +1,1620 @@ +/***************************************************************************** +* ppp.c - Network Point to Point Protocol program file. +* +* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. +* portions Copyright (c) 1997 by Global Election Systems Inc. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY +* +* 03-01-01 Marc Boucher <marc@mbsi.ca> +* Ported to lwIP. +* 97-11-05 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc. +* Original. +*****************************************************************************/ + +/* + * ppp_defs.h - PPP definitions. + * + * if_pppvar.h - private structures and declarations for PPP. + * + * Copyright (c) 1994 The Australian National University. + * All rights reserved. + * + * Permission to use, copy, modify, and distribute this software and its + * documentation is hereby granted, provided that the above copyright + * notice appears in all copies. This software is provided without any + * warranty, express or implied. The Australian National University + * makes no representations about the suitability of this software for + * any purpose. + * + * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY + * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF + * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES, + * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS + * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO + * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, + * OR MODIFICATIONS. + */ + +/* + * if_ppp.h - Point-to-Point Protocol definitions. + * + * Copyright (c) 1989 Carnegie Mellon University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Carnegie Mellon University. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ +#include "ppp.h" +#if PPP_SUPPORT > 0 +#include "randm.h" +#include "fsm.h" +#if PAP_SUPPORT > 0 +#include "pap.h" +#endif +#if CHAP_SUPPORT > 0 +#include "chap.h" +#endif +#include "ipcp.h" +#include "lcp.h" +#include "magic.h" +#include "auth.h" +#if VJ_SUPPORT > 0 +#include "vj.h" +#endif + +#include "pppdebug.h" + +/*************************/ +/*** LOCAL DEFINITIONS ***/ +/*************************/ + +/* + * The basic PPP frame. + */ +#define PPP_ADDRESS(p) (((u_char *)(p))[0]) +#define PPP_CONTROL(p) (((u_char *)(p))[1]) +#define PPP_PROTOCOL(p) ((((u_char *)(p))[2] << 8) + ((u_char *)(p))[3]) + +/* PPP packet parser states. Current state indicates operation yet to be + * completed. */ +typedef enum { + PDIDLE = 0, /* Idle state - waiting. */ + PDSTART, /* Process start flag. */ + PDADDRESS, /* Process address field. */ + PDCONTROL, /* Process control field. */ + PDPROTOCOL1, /* Process protocol field 1. */ + PDPROTOCOL2, /* Process protocol field 2. */ + PDDATA /* Process data byte. */ +} PPPDevStates; + +#define ESCAPE_P(accm, c) ((accm)[(c) >> 3] & pppACCMMask[c & 0x07]) + +/************************/ +/*** LOCAL DATA TYPES ***/ +/************************/ +/* + * PPP interface control block. + */ +typedef struct PPPControl_s { + char openFlag; /* True when in use. */ + char oldFrame; /* Old framing character for fd. */ + sio_fd_t fd; /* File device ID of port. */ + int kill_link; /* Shut the link down. */ + int sig_hup; /* Carrier lost. */ + int if_up; /* True when the interface is up. */ + int errCode; /* Code indicating why interface is down. */ + struct pbuf *inHead, *inTail; /* The input packet. */ + PPPDevStates inState; /* The input process state. */ + char inEscaped; /* Escape next character. */ + u16_t inProtocol; /* The input protocol code. */ + u16_t inFCS; /* Input Frame Check Sequence value. */ + int mtu; /* Peer's mru */ + int pcomp; /* Does peer accept protocol compression? */ + int accomp; /* Does peer accept addr/ctl compression? */ + u_long lastXMit; /* Time of last transmission. */ + ext_accm inACCM; /* Async-Ctl-Char-Map for input. */ + ext_accm outACCM; /* Async-Ctl-Char-Map for output. */ +#if VJ_SUPPORT > 0 + int vjEnabled; /* Flag indicating VJ compression enabled. */ + struct vjcompress vjComp; /* Van Jabobsen compression header. */ +#endif + + struct netif netif; + + struct ppp_addrs addrs; + + void (*linkStatusCB)(void *ctx, int errCode, void *arg); + void *linkStatusCtx; + +} PPPControl; + + +/* + * Ioctl definitions. + */ + +struct npioctl { + int protocol; /* PPP procotol, e.g. PPP_IP */ + enum NPmode mode; +}; + + + +/***********************************/ +/*** LOCAL FUNCTION DECLARATIONS ***/ +/***********************************/ +static void pppMain(void *pd); +static void pppDrop(PPPControl *pc); +static void pppInProc(int pd, u_char *s, int l); + + +/******************************/ +/*** PUBLIC DATA STRUCTURES ***/ +/******************************/ +u_long subnetMask; + +static PPPControl pppControl[NUM_PPP]; /* The PPP interface control blocks. */ + +/* + * PPP Data Link Layer "protocol" table. + * One entry per supported protocol. + * The last entry must be NULL. + */ +struct protent *ppp_protocols[] = { + &lcp_protent, +#if PAP_SUPPORT > 0 + &pap_protent, +#endif +#if CHAP_SUPPORT > 0 + &chap_protent, +#endif +#if CBCP_SUPPORT > 0 + &cbcp_protent, +#endif + &ipcp_protent, +#if CCP_SUPPORT > 0 + &ccp_protent, +#endif + NULL +}; + + +/* + * Buffers for outgoing packets. This must be accessed only from the appropriate + * PPP task so that it doesn't need to be protected to avoid collisions. + */ +u_char outpacket_buf[NUM_PPP][PPP_MRU+PPP_HDRLEN]; + + +/*****************************/ +/*** LOCAL DATA STRUCTURES ***/ +/*****************************/ + +/* + * FCS lookup table as calculated by genfcstab. + */ +static const u_short fcstab[256] = { + 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, + 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, + 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, + 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, + 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, + 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, + 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, + 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, + 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, + 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, + 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, + 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, + 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, + 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, + 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, + 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, + 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, + 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, + 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, + 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, + 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, + 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, + 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, + 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, + 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, + 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, + 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, + 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, + 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, + 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, + 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, + 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 +}; + +/* PPP's Asynchronous-Control-Character-Map. The mask array is used + * to select the specific bit for a character. */ +static u_char pppACCMMask[] = { + 0x01, + 0x02, + 0x04, + 0x08, + 0x10, + 0x20, + 0x40, + 0x80 +}; + + +/***********************************/ +/*** PUBLIC FUNCTION DEFINITIONS ***/ +/***********************************/ +/* Initialize the PPP subsystem. */ + +struct ppp_settings ppp_settings; + +void pppInit(void) +{ + struct protent *protp; + int i, j; + + memset(&ppp_settings, 0, sizeof(ppp_settings)); + ppp_settings.usepeerdns = 1; + pppSetAuth(PPPAUTHTYPE_NONE, NULL, NULL); + + magicInit(); + + for (i = 0; i < NUM_PPP; i++) { + pppControl[i].openFlag = 0; + + subnetMask = htonl(0xffffff00); + + /* + * Initialize to the standard option set. + */ + for (j = 0; (protp = ppp_protocols[j]) != NULL; ++j) + (*protp->init)(i); + } + +#if LINK_STATS + /* Clear the statistics. */ + memset(&lwip_stats.link, 0, sizeof(lwip_stats.link)); +#endif +} + +void pppSetAuth(enum pppAuthType authType, const char *user, const char *passwd) +{ + switch(authType) { + case PPPAUTHTYPE_NONE: + default: +#ifdef LWIP_PPP_STRICT_PAP_REJECT + ppp_settings.refuse_pap = 1; +#else + /* some providers request pap and accept an empty login/pw */ + ppp_settings.refuse_pap = 0; +#endif + ppp_settings.refuse_chap = 1; + break; + case PPPAUTHTYPE_ANY: +/* Warning: Using PPPAUTHTYPE_ANY might have security consequences. + * RFC 1994 says: + * + * In practice, within or associated with each PPP server, there is a + * database which associates "user" names with authentication + * information ("secrets"). It is not anticipated that a particular + * named user would be authenticated by multiple methods. This would + * make the user vulnerable to attacks which negotiate the least secure + * method from among a set (such as PAP rather than CHAP). If the same + * secret was used, PAP would reveal the secret to be used later with + * CHAP. + * + * Instead, for each user name there should be an indication of exactly + * one method used to authenticate that user name. If a user needs to + * make use of different authentication methods under different + * circumstances, then distinct user names SHOULD be employed, each of + * which identifies exactly one authentication method. + * + */ + ppp_settings.refuse_pap = 0; + ppp_settings.refuse_chap = 0; + break; + case PPPAUTHTYPE_PAP: + ppp_settings.refuse_pap = 0; + ppp_settings.refuse_chap = 1; + break; + case PPPAUTHTYPE_CHAP: + ppp_settings.refuse_pap = 1; + ppp_settings.refuse_chap = 0; + break; + } + + if(user) { + strncpy(ppp_settings.user, user, sizeof(ppp_settings.user)-1); + ppp_settings.user[sizeof(ppp_settings.user)-1] = '\0'; + } else + ppp_settings.user[0] = '\0'; + + if(passwd) { + strncpy(ppp_settings.passwd, passwd, sizeof(ppp_settings.passwd)-1); + ppp_settings.passwd[sizeof(ppp_settings.passwd)-1] = '\0'; + } else + ppp_settings.passwd[0] = '\0'; +} + +/* Open a new PPP connection using the given I/O device. + * This initializes the PPP control block but does not + * attempt to negotiate the LCP session. If this port + * connects to a modem, the modem connection must be + * established before calling this. + * Return a new PPP connection descriptor on success or + * an error code (negative) on failure. */ +int pppOpen(sio_fd_t fd, void (*linkStatusCB)(void *ctx, int errCode, void *arg), void *linkStatusCtx) +{ + PPPControl *pc; + int pd; + + /* Find a free PPP session descriptor. Critical region? */ + for (pd = 0; pd < NUM_PPP && pppControl[pd].openFlag != 0; pd++); + if (pd >= NUM_PPP) + pd = PPPERR_OPEN; + else + pppControl[pd].openFlag = !0; + + /* Launch a deamon thread. */ + if (pd >= 0) { + + pppControl[pd].openFlag = 1; + + lcp_init(pd); + pc = &pppControl[pd]; + pc->fd = fd; + pc->kill_link = 0; + pc->sig_hup = 0; + pc->if_up = 0; + pc->errCode = 0; + pc->inState = PDIDLE; + pc->inHead = NULL; + pc->inTail = NULL; + pc->inEscaped = 0; + pc->lastXMit = 0; + +#if VJ_SUPPORT > 0 + pc->vjEnabled = 0; + vj_compress_init(&pc->vjComp); +#endif + + /* + * Default the in and out accm so that escape and flag characters + * are always escaped. + */ + memset(pc->inACCM, 0, sizeof(ext_accm)); + pc->inACCM[15] = 0x60; + memset(pc->outACCM, 0, sizeof(ext_accm)); + pc->outACCM[15] = 0x60; + + pc->linkStatusCB = linkStatusCB; + pc->linkStatusCtx = linkStatusCtx; + + sys_thread_new(pppMain, (void*)pd, PPP_THREAD_PRIO); + if(!linkStatusCB) { + while(pd >= 0 && !pc->if_up) { + sys_msleep(500); + if (lcp_phase[pd] == PHASE_DEAD) { + pppClose(pd); + if (pc->errCode) + pd = pc->errCode; + else + pd = PPPERR_CONNECT; + } + } + } + } + return pd; +} + +/* Close a PPP connection and release the descriptor. + * Any outstanding packets in the queues are dropped. + * Return 0 on success, an error code on failure. */ +int pppClose(int pd) +{ + PPPControl *pc = &pppControl[pd]; + int st = 0; + + /* Disconnect */ + pc->kill_link = !0; + pppMainWakeup(pd); + + if(!pc->linkStatusCB) { + while(st >= 0 && lcp_phase[pd] != PHASE_DEAD) { + sys_msleep(500); + break; + } + } + return st; +} + +/* This function is called when carrier is lost on the PPP channel. */ +void pppSigHUP(int pd) +{ + PPPControl *pc = &pppControl[pd]; + + pc->sig_hup = 1; + pppMainWakeup(pd); +} + +static void nPut(PPPControl *pc, struct pbuf *nb) +{ + struct pbuf *b; + int c; + + for(b = nb; b != NULL; b = b->next) { + if((c = sio_write(pc->fd, b->payload, b->len)) != b->len) { + PPPDEBUG((LOG_WARNING, + "PPP nPut: incomplete sio_write(%d,, %u) = %d\n", pc->fd, b->len, c)); +#if LINK_STATS + lwip_stats.link.err++; +#endif /* LINK_STATS */ + pc->lastXMit = 0; /* prepend PPP_FLAG to next packet */ + break; + } + } + pbuf_free(nb); + +#if LINK_STATS + lwip_stats.link.xmit++; +#endif /* LINK_STATS */ +} + +/* + * pppAppend - append given character to end of given pbuf. If outACCM + * is not NULL and the character needs to be escaped, do so. + * If pbuf is full, append another. + * Return the current pbuf. + */ +static struct pbuf *pppAppend(u_char c, struct pbuf *nb, ext_accm *outACCM) +{ + struct pbuf *tb = nb; + + /* Make sure there is room for the character and an escape code. + * Sure we don't quite fill the buffer if the character doesn't + * get escaped but is one character worth complicating this? */ + /* Note: We assume no packet header. */ + if (nb && (PBUF_POOL_BUFSIZE - nb->len) < 2) { + tb = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL); + if (tb) { + nb->next = tb; + } +#if LINK_STATS + else { + lwip_stats.link.memerr++; + } +#endif /* LINK_STATS */ + nb = tb; + } + if (nb) { + if (outACCM && ESCAPE_P(*outACCM, c)) { + *((u_char*)nb->payload + nb->len++) = PPP_ESCAPE; + *((u_char*)nb->payload + nb->len++) = c ^ PPP_TRANS; + } + else + *((u_char*)nb->payload + nb->len++) = c; + } + + return tb; +} + +/* Send a packet on the given connection. */ +static err_t pppifOutput(struct netif *netif, struct pbuf *pb, struct ip_addr *ipaddr) +{ + int pd = (int)netif->state; + u_short protocol = PPP_IP; + PPPControl *pc = &pppControl[pd]; + u_int fcsOut = PPP_INITFCS; + struct pbuf *headMB = NULL, *tailMB = NULL, *p; + u_char c; + + (void)ipaddr; + + /* Validate parameters. */ + /* We let any protocol value go through - it can't hurt us + * and the peer will just drop it if it's not accepting it. */ + if (pd < 0 || pd >= NUM_PPP || !pc->openFlag || !pb) { + PPPDEBUG((LOG_WARNING, "pppifOutput[%d]: bad parms prot=%d pb=%p\n", + pd, protocol, pb)); +#if LINK_STATS + lwip_stats.link.opterr++; + lwip_stats.link.drop++; +#endif + return ERR_ARG; + } + + /* Check that the link is up. */ + if (lcp_phase[pd] == PHASE_DEAD) { + PPPDEBUG((LOG_ERR, "pppifOutput[%d]: link not up\n", pd)); +#if LINK_STATS + lwip_stats.link.rterr++; + lwip_stats.link.drop++; +#endif + return ERR_RTE; + } + + /* Grab an output buffer. */ + headMB = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL); + if (headMB == NULL) { + PPPDEBUG((LOG_WARNING, "pppifOutput[%d]: first alloc fail\n", pd)); +#if LINK_STATS + lwip_stats.link.memerr++; + lwip_stats.link.drop++; +#endif /* LINK_STATS */ + return ERR_MEM; + } + +#if VJ_SUPPORT > 0 + /* + * Attempt Van Jacobson header compression if VJ is configured and + * this is an IP packet. + */ + if (protocol == PPP_IP && pc->vjEnabled) { + switch (vj_compress_tcp(&pc->vjComp, pb)) { + case TYPE_IP: + /* No change... + protocol = PPP_IP_PROTOCOL; + */ + break; + case TYPE_COMPRESSED_TCP: + protocol = PPP_VJC_COMP; + break; + case TYPE_UNCOMPRESSED_TCP: + protocol = PPP_VJC_UNCOMP; + break; + default: + PPPDEBUG((LOG_WARNING, "pppifOutput[%d]: bad IP packet\n", pd)); +#if LINK_STATS + lwip_stats.link.proterr++; + lwip_stats.link.drop++; +#endif + pbuf_free(headMB); + return ERR_VAL; + } + } +#endif + + tailMB = headMB; + + /* Build the PPP header. */ + if ((sys_jiffies() - pc->lastXMit) >= PPP_MAXIDLEFLAG) + tailMB = pppAppend(PPP_FLAG, tailMB, NULL); + pc->lastXMit = sys_jiffies(); + if (!pc->accomp) { + fcsOut = PPP_FCS(fcsOut, PPP_ALLSTATIONS); + tailMB = pppAppend(PPP_ALLSTATIONS, tailMB, &pc->outACCM); + fcsOut = PPP_FCS(fcsOut, PPP_UI); + tailMB = pppAppend(PPP_UI, tailMB, &pc->outACCM); + } + if (!pc->pcomp || protocol > 0xFF) { + c = (protocol >> 8) & 0xFF; + fcsOut = PPP_FCS(fcsOut, c); + tailMB = pppAppend(c, tailMB, &pc->outACCM); + } + c = protocol & 0xFF; + fcsOut = PPP_FCS(fcsOut, c); + tailMB = pppAppend(c, tailMB, &pc->outACCM); + + /* Load packet. */ + for(p = pb; p; p = p->next) { + int n; + u_char *sPtr; + + sPtr = (u_char*)p->payload; + n = p->len; + while (n-- > 0) { + c = *sPtr++; + + /* Update FCS before checking for special characters. */ + fcsOut = PPP_FCS(fcsOut, c); + + /* Copy to output buffer escaping special characters. */ + tailMB = pppAppend(c, tailMB, &pc->outACCM); + } + } + + /* Add FCS and trailing flag. */ + c = ~fcsOut & 0xFF; + tailMB = pppAppend(c, tailMB, &pc->outACCM); + c = (~fcsOut >> 8) & 0xFF; + tailMB = pppAppend(c, tailMB, &pc->outACCM); + tailMB = pppAppend(PPP_FLAG, tailMB, NULL); + + /* If we failed to complete the packet, throw it away. */ + if (!tailMB) { + PPPDEBUG((LOG_WARNING, + "pppifOutput[%d]: Alloc err - dropping proto=%d\n", + pd, protocol)); + pbuf_free(headMB); +#if LINK_STATS + lwip_stats.link.memerr++; + lwip_stats.link.drop++; +#endif + return ERR_MEM; + } + + /* Send it. */ + PPPDEBUG((LOG_INFO, "pppifOutput[%d]: proto=0x%04X\n", pd, protocol)); + + nPut(pc, headMB); + + return ERR_OK; +} + +/* Get and set parameters for the given connection. + * Return 0 on success, an error code on failure. */ +int pppIOCtl(int pd, int cmd, void *arg) +{ + PPPControl *pc = &pppControl[pd]; + int st = 0; + + if (pd < 0 || pd >= NUM_PPP) + st = PPPERR_PARAM; + else { + switch(cmd) { + case PPPCTLG_UPSTATUS: /* Get the PPP up status. */ + if (arg) + *(int *)arg = (int)(pc->if_up); + else + st = PPPERR_PARAM; + break; + case PPPCTLS_ERRCODE: /* Set the PPP error code. */ + if (arg) + pc->errCode = *(int *)arg; + else + st = PPPERR_PARAM; + break; + case PPPCTLG_ERRCODE: /* Get the PPP error code. */ + if (arg) + *(int *)arg = (int)(pc->errCode); + else + st = PPPERR_PARAM; + break; + case PPPCTLG_FD: + if (arg) + *(sio_fd_t *)arg = pc->fd; + else + st = PPPERR_PARAM; + break; + default: + st = PPPERR_PARAM; + break; + } + } + + return st; +} + +/* + * Return the Maximum Transmission Unit for the given PPP connection. + */ +u_int pppMTU(int pd) +{ + PPPControl *pc = &pppControl[pd]; + u_int st; + + /* Validate parameters. */ + if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) + st = 0; + else + st = pc->mtu; + + return st; +} + +/* + * Write n characters to a ppp link. + * RETURN: >= 0 Number of characters written + * -1 Failed to write to device + */ +int pppWrite(int pd, const u_char *s, int n) +{ + PPPControl *pc = &pppControl[pd]; + u_char c; + u_int fcsOut = PPP_INITFCS; + struct pbuf *headMB = NULL, *tailMB; + headMB = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL); + if (headMB == NULL) { +#if LINK_STATS + lwip_stats.link.memerr++; + lwip_stats.link.proterr++; +#endif /* LINK_STATS */ + return PPPERR_ALLOC; + } + + tailMB = headMB; + + /* If the link has been idle, we'll send a fresh flag character to + * flush any noise. */ + if ((sys_jiffies() - pc->lastXMit) >= PPP_MAXIDLEFLAG) + tailMB = pppAppend(PPP_FLAG, tailMB, NULL); + pc->lastXMit = sys_jiffies(); + + /* Load output buffer. */ + while (n-- > 0) { + c = *s++; + + /* Update FCS before checking for special characters. */ + fcsOut = PPP_FCS(fcsOut, c); + + /* Copy to output buffer escaping special characters. */ + tailMB = pppAppend(c, tailMB, &pc->outACCM); + } + + /* Add FCS and trailing flag. */ + c = ~fcsOut & 0xFF; + tailMB = pppAppend(c, tailMB, &pc->outACCM); + c = (~fcsOut >> 8) & 0xFF; + tailMB = pppAppend(c, tailMB, &pc->outACCM); + tailMB = pppAppend(PPP_FLAG, tailMB, NULL); + + /* If we failed to complete the packet, throw it away. + * Otherwise send it. */ + if (!tailMB) { + PPPDEBUG((LOG_WARNING, + "pppWrite[%d]: Alloc err - dropping pbuf len=%d\n", pd, headMB->len)); +/* "pppWrite[%d]: Alloc err - dropping %d:%.*H", pd, headMB->len, LWIP_MIN(headMB->len * 2, 40), headMB->payload)); */ + pbuf_free(headMB); +#if LINK_STATS + lwip_stats.link.memerr++; + lwip_stats.link.proterr++; +#endif /* LINK_STATS */ + return PPPERR_ALLOC; + } + + PPPDEBUG((LOG_INFO, "pppWrite[%d]: len=%d\n", pd, headMB->len)); +/* "pppWrite[%d]: %d:%.*H", pd, headMB->len, LWIP_MIN(headMB->len * 2, 40), headMB->payload)); */ + nPut(pc, headMB); + + return PPPERR_NONE; +} + +/* + * ppp_send_config - configure the transmit characteristics of + * the ppp interface. + */ +void ppp_send_config( + int unit, + int mtu, + u32_t asyncmap, + int pcomp, + int accomp +) +{ + PPPControl *pc = &pppControl[unit]; + int i; + + pc->mtu = mtu; + pc->pcomp = pcomp; + pc->accomp = accomp; + + /* Load the ACCM bits for the 32 control codes. */ + for (i = 0; i < 32/8; i++) + pc->outACCM[i] = (u_char)((asyncmap >> (8 * i)) & 0xFF); + PPPDEBUG((LOG_INFO, "ppp_send_config[%d]: outACCM=%X %X %X %X\n", + unit, + pc->outACCM[0], pc->outACCM[1], pc->outACCM[2], pc->outACCM[3])); +} + + +/* + * ppp_set_xaccm - set the extended transmit ACCM for the interface. + */ +void ppp_set_xaccm(int unit, ext_accm *accm) +{ + memcpy(pppControl[unit].outACCM, accm, sizeof(ext_accm)); + PPPDEBUG((LOG_INFO, "ppp_set_xaccm[%d]: outACCM=%X %X %X %X\n", + unit, + pppControl[unit].outACCM[0], + pppControl[unit].outACCM[1], + pppControl[unit].outACCM[2], + pppControl[unit].outACCM[3])); +} + + +/* + * ppp_recv_config - configure the receive-side characteristics of + * the ppp interface. + */ +void ppp_recv_config( + int unit, + int mru, + u32_t asyncmap, + int pcomp, + int accomp +) +{ + PPPControl *pc = &pppControl[unit]; + int i; + + (void)accomp; + (void)pcomp; + (void)mru; + + /* Load the ACCM bits for the 32 control codes. */ + for (i = 0; i < 32 / 8; i++) + pc->inACCM[i] = (u_char)(asyncmap >> (i * 8)); + PPPDEBUG((LOG_INFO, "ppp_recv_config[%d]: inACCM=%X %X %X %X\n", + unit, + pc->inACCM[0], pc->inACCM[1], pc->inACCM[2], pc->inACCM[3])); +} + +#if 0 +/* + * ccp_test - ask kernel whether a given compression method + * is acceptable for use. Returns 1 if the method and parameters + * are OK, 0 if the method is known but the parameters are not OK + * (e.g. code size should be reduced), or -1 if the method is unknown. + */ +int ccp_test( + int unit, + int opt_len, + int for_transmit, + u_char *opt_ptr +) +{ + return 0; /* XXX Currently no compression. */ +} + +/* + * ccp_flags_set - inform kernel about the current state of CCP. + */ +void ccp_flags_set(int unit, int isopen, int isup) +{ + /* XXX */ +} + +/* + * ccp_fatal_error - returns 1 if decompression was disabled as a + * result of an error detected after decompression of a packet, + * 0 otherwise. This is necessary because of patent nonsense. + */ +int ccp_fatal_error(int unit) +{ + /* XXX */ + return 0; +} +#endif + +/* + * get_idle_time - return how long the link has been idle. + */ +int get_idle_time(int u, struct ppp_idle *ip) +{ + /* XXX */ + (void)u; + (void)ip; + + return 0; +} + + +/* + * Return user specified netmask, modified by any mask we might determine + * for address `addr' (in network byte order). + * Here we scan through the system's list of interfaces, looking for + * any non-point-to-point interfaces which might appear to be on the same + * network as `addr'. If we find any, we OR in their netmask to the + * user-specified netmask. + */ +u32_t GetMask(u32_t addr) +{ + u32_t mask, nmask; + + htonl(addr); + if (IN_CLASSA(addr)) /* determine network mask for address class */ + nmask = IN_CLASSA_NET; + else if (IN_CLASSB(addr)) + nmask = IN_CLASSB_NET; + else + nmask = IN_CLASSC_NET; + /* class D nets are disallowed by bad_ip_adrs */ + mask = subnetMask | htonl(nmask); + + /* XXX + * Scan through the system's network interfaces. + * Get each netmask and OR them into our mask. + */ + + return mask; +} + +/* + * sifvjcomp - config tcp header compression + */ +int sifvjcomp( + int pd, + int vjcomp, + int cidcomp, + int maxcid +) +{ +#if VJ_SUPPORT > 0 + PPPControl *pc = &pppControl[pd]; + + pc->vjEnabled = vjcomp; + pc->vjComp.compressSlot = cidcomp; + pc->vjComp.maxSlotIndex = maxcid; + PPPDEBUG((LOG_INFO, "sifvjcomp: VJ compress enable=%d slot=%d max slot=%d\n", + vjcomp, cidcomp, maxcid)); +#endif + + return 0; +} + +/* + * pppifNetifInit - netif init callback + */ +static err_t pppifNetifInit(struct netif *netif) +{ + netif->name[0] = 'p'; + netif->name[1] = 'p'; + netif->output = pppifOutput; + netif->mtu = pppMTU((int)netif->state); + return ERR_OK; +} + + +/* + * sifup - Config the interface up and enable IP packets to pass. + */ +int sifup(int pd) +{ + PPPControl *pc = &pppControl[pd]; + int st = 1; + + if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) { + st = 0; + PPPDEBUG((LOG_WARNING, "sifup[%d]: bad parms\n", pd)); + } else { + netif_remove(&pc->netif); + if (netif_add(&pc->netif, &pc->addrs.our_ipaddr, &pc->addrs.netmask, &pc->addrs.his_ipaddr, (void *)pd, pppifNetifInit, ip_input)) { + pc->if_up = 1; + pc->errCode = PPPERR_NONE; + + PPPDEBUG((LOG_DEBUG, "sifup: unit %d: linkStatusCB=%lx errCode=%d\n", pd, pc->linkStatusCB, pc->errCode)); + if(pc->linkStatusCB) + pc->linkStatusCB(pc->linkStatusCtx, pc->errCode, &pc->addrs); + } else { + st = 0; + PPPDEBUG((LOG_ERR, "sifup[%d]: netif_add failed\n", pd)); + } + } + + return st; +} + +/* + * sifnpmode - Set the mode for handling packets for a given NP. + */ +int sifnpmode(int u, int proto, enum NPmode mode) +{ + (void)u; + (void)proto; + (void)mode; + return 0; +} + +/* + * sifdown - Config the interface down and disable IP. + */ +int sifdown(int pd) +{ + PPPControl *pc = &pppControl[pd]; + int st = 1; + + if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) { + st = 0; + PPPDEBUG((LOG_WARNING, "sifdown[%d]: bad parms\n", pd)); + } else { + pc->if_up = 0; + netif_remove(&pc->netif); + PPPDEBUG((LOG_DEBUG, "sifdown: unit %d: linkStatusCB=%lx errCode=%d\n", pd, pc->linkStatusCB, pc->errCode)); + if(pc->linkStatusCB) + pc->linkStatusCB(pc->linkStatusCtx, PPPERR_CONNECT, NULL); + } + return st; +} + +/* + * sifaddr - Config the interface IP addresses and netmask. + */ +int sifaddr( + int pd, /* Interface unit ??? */ + u32_t o, /* Our IP address ??? */ + u32_t h, /* His IP address ??? */ + u32_t m, /* IP subnet mask ??? */ + u32_t ns1, /* Primary DNS */ + u32_t ns2 /* Secondary DNS */ +) +{ + PPPControl *pc = &pppControl[pd]; + int st = 1; + + if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) { + st = 0; + PPPDEBUG((LOG_WARNING, "sifup[%d]: bad parms\n", pd)); + } else { + memcpy(&pc->addrs.our_ipaddr, &o, sizeof(o)); + memcpy(&pc->addrs.his_ipaddr, &h, sizeof(h)); + memcpy(&pc->addrs.netmask, &m, sizeof(m)); + memcpy(&pc->addrs.dns1, &ns1, sizeof(ns1)); + memcpy(&pc->addrs.dns2, &ns2, sizeof(ns2)); + } + return st; +} + +/* + * cifaddr - Clear the interface IP addresses, and delete routes + * through the interface if possible. + */ +int cifaddr( + int pd, /* Interface unit ??? */ + u32_t o, /* Our IP address ??? */ + u32_t h /* IP broadcast address ??? */ +) +{ + PPPControl *pc = &pppControl[pd]; + int st = 1; + + (void)o; + (void)h; + if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) { + st = 0; + PPPDEBUG((LOG_WARNING, "sifup[%d]: bad parms\n", pd)); + } else { + IP4_ADDR(&pc->addrs.our_ipaddr, 0,0,0,0); + IP4_ADDR(&pc->addrs.his_ipaddr, 0,0,0,0); + IP4_ADDR(&pc->addrs.netmask, 255,255,255,0); + IP4_ADDR(&pc->addrs.dns1, 0,0,0,0); + IP4_ADDR(&pc->addrs.dns2, 0,0,0,0); + } + return st; +} + +/* + * sifdefaultroute - assign a default route through the address given. + */ +int sifdefaultroute(int pd, u32_t l, u32_t g) +{ + PPPControl *pc = &pppControl[pd]; + int st = 1; + + (void)l; + (void)g; + if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) { + st = 0; + PPPDEBUG((LOG_WARNING, "sifup[%d]: bad parms\n", pd)); + } else { + netif_set_default(&pc->netif); + } + + /* TODO: check how PPP handled the netMask, previously not set by ipSetDefault */ + + return st; +} + +/* + * cifdefaultroute - delete a default route through the address given. + */ +int cifdefaultroute(int pd, u32_t l, u32_t g) +{ + PPPControl *pc = &pppControl[pd]; + int st = 1; + + (void)l; + (void)g; + if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) { + st = 0; + PPPDEBUG((LOG_WARNING, "sifup[%d]: bad parms\n", pd)); + } else { + netif_set_default(NULL); + } + + return st; +} + +void +pppMainWakeup(int pd) +{ + PPPDEBUG((LOG_DEBUG, "pppMainWakeup: unit %d\n", pd)); + sio_read_abort(pppControl[pd].fd); +} + +/* these callbacks are necessary because lcp_* functions + must be called in the same context as pppInput(), + namely the tcpip_thread(), essentially because + they manipulate timeouts which are thread-private +*/ + +static void +pppStartCB(void *arg) +{ + int pd = (int)arg; + + PPPDEBUG((LOG_DEBUG, "pppStartCB: unit %d\n", pd)); + lcp_lowerup(pd); + lcp_open(pd); /* Start protocol */ +} + +static void +pppStopCB(void *arg) +{ + int pd = (int)arg; + + PPPDEBUG((LOG_DEBUG, "pppStopCB: unit %d\n", pd)); + lcp_close(pd, "User request"); +} + +static void +pppHupCB(void *arg) +{ + int pd = (int)arg; + + PPPDEBUG((LOG_DEBUG, "pppHupCB: unit %d\n", pd)); + lcp_lowerdown(pd); + link_terminated(pd); +} +/**********************************/ +/*** LOCAL FUNCTION DEFINITIONS ***/ +/**********************************/ +/* The main PPP process function. This implements the state machine according + * to section 4 of RFC 1661: The Point-To-Point Protocol. */ +static void pppMain(void *arg) +{ + int pd = (int)arg; + struct pbuf *p; + PPPControl* pc; + + pc = &pppControl[pd]; + + p = pbuf_alloc(PBUF_RAW, PPP_MRU+PPP_HDRLEN, PBUF_RAM); + if(!p) { + LWIP_ASSERT("p != NULL", p); + pc->errCode = PPPERR_ALLOC; + goto out; + } + + /* + * Start the connection and handle incoming events (packet or timeout). + */ + PPPDEBUG((LOG_INFO, "pppMain: unit %d: Connecting\n", pd)); + tcpip_callback(pppStartCB, arg); + while (lcp_phase[pd] != PHASE_DEAD) { + if (pc->kill_link) { + PPPDEBUG((LOG_DEBUG, "pppMainWakeup: unit %d kill_link -> pppStopCB\n", pd)); + pc->errCode = PPPERR_USER; + /* This will leave us at PHASE_DEAD. */ + tcpip_callback(pppStopCB, arg); + pc->kill_link = 0; + } + else if (pc->sig_hup) { + PPPDEBUG((LOG_DEBUG, "pppMainWakeup: unit %d sig_hup -> pppHupCB\n", pd)); + pc->sig_hup = 0; + tcpip_callback(pppHupCB, arg); + } else { + int c = sio_read(pc->fd, p->payload, p->len); + if(c > 0) { + pppInProc(pd, p->payload, c); + } else { + PPPDEBUG((LOG_DEBUG, "pppMainWakeup: unit %d sio_read len=%d returned %d\n", pd, p->len, c)); + sys_msleep(250); /* give other tasks a chance to run */ + } + } + } + PPPDEBUG((LOG_INFO, "pppMain: unit %d: PHASE_DEAD\n", pd)); + pbuf_free(p); + +out: + PPPDEBUG((LOG_DEBUG, "pppMain: unit %d: linkStatusCB=%lx errCode=%d\n", pd, pc->linkStatusCB, pc->errCode)); + if(pc->linkStatusCB) + pc->linkStatusCB(pc->linkStatusCtx, pc->errCode ? pc->errCode : PPPERR_PROTOCOL, NULL); + + pc->openFlag = 0; +} + +static struct pbuf *pppSingleBuf(struct pbuf *p) +{ + struct pbuf *q, *b; + u_char *pl; + + if(p->tot_len == p->len) + return p; + + q = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM); + if(!q) { + PPPDEBUG((LOG_ERR, + "pppSingleBuf: unable to alloc new buf (%d)\n", p->tot_len)); + return p; /* live dangerously */ + } + + for(b = p, pl = q->payload; b != NULL; b = b->next) { + memcpy(pl, b->payload, b->len); + pl += b->len; + } + + pbuf_free(p); + + return q; +} + +struct pppInputHeader { + int unit; + u16_t proto; +}; + +/* + * Pass the processed input packet to the appropriate handler. + * This function and all handlers run in the context of the tcpip_thread + */ +static void pppInput(void *arg) +{ + struct pbuf *nb = (struct pbuf *)arg; + u16_t protocol; + int pd; + + pd = ((struct pppInputHeader *)nb->payload)->unit; + protocol = ((struct pppInputHeader *)nb->payload)->proto; + + pbuf_header(nb, -(int)sizeof(struct pppInputHeader)); + +#if LINK_STATS + lwip_stats.link.recv++; +#endif /* LINK_STATS */ + + /* + * Toss all non-LCP packets unless LCP is OPEN. + * Until we get past the authentication phase, toss all packets + * except LCP, LQR and authentication packets. + */ + if((lcp_phase[pd] <= PHASE_AUTHENTICATE) && (protocol != PPP_LCP)) { + if(!((protocol == PPP_LQR) || (protocol == PPP_PAP) || (protocol == PPP_CHAP)) || + (lcp_phase[pd] != PHASE_AUTHENTICATE)) { + PPPDEBUG((LOG_INFO, "pppInput: discarding proto 0x%04X in phase %d\n", protocol, lcp_phase[pd])); + goto drop; + } + } + + switch(protocol) { + case PPP_VJC_COMP: /* VJ compressed TCP */ +#if VJ_SUPPORT > 0 + PPPDEBUG((LOG_INFO, "pppInput[%d]: vj_comp in pbuf len=%d\n", pd, nb->len)); + /* + * Clip off the VJ header and prepend the rebuilt TCP/IP header and + * pass the result to IP. + */ + if (vj_uncompress_tcp(&nb, &pppControl[pd].vjComp) >= 0) { + pppControl[pd].netif.input(nb, &pppControl[pd].netif); + return; + } + /* Something's wrong so drop it. */ + PPPDEBUG((LOG_WARNING, "pppInput[%d]: Dropping VJ compressed\n", pd)); +#else + /* No handler for this protocol so drop the packet. */ + PPPDEBUG((LOG_INFO, "pppInput[%d]: drop VJ Comp in %d:%s\n", pd, nb->len, nb->payload)); +#endif /* VJ_SUPPORT > 0 */ + break; + case PPP_VJC_UNCOMP: /* VJ uncompressed TCP */ +#if VJ_SUPPORT > 0 + PPPDEBUG((LOG_INFO, "pppInput[%d]: vj_un in pbuf len=%d\n", pd, nb->len)); + /* + * Process the TCP/IP header for VJ header compression and then pass + * the packet to IP. + */ + if (vj_uncompress_uncomp(nb, &pppControl[pd].vjComp) >= 0) { + pppControl[pd].netif.input(nb, &pppControl[pd].netif); + return; + } + /* Something's wrong so drop it. */ + PPPDEBUG((LOG_WARNING, "pppInput[%d]: Dropping VJ uncompressed\n", pd)); +#else + /* No handler for this protocol so drop the packet. */ + PPPDEBUG((LOG_INFO, + "pppInput[%d]: drop VJ UnComp in %d:.*H\n", + pd, nb->len, LWIP_MIN(nb->len * 2, 40), nb->payload)); +#endif /* VJ_SUPPORT > 0 */ + break; + case PPP_IP: /* Internet Protocol */ + PPPDEBUG((LOG_INFO, "pppInput[%d]: ip in pbuf len=%d\n", pd, nb->len)); + pppControl[pd].netif.input(nb, &pppControl[pd].netif); + return; + default: + { + struct protent *protp; + int i; + + /* + * Upcall the proper protocol input routine. + */ + for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) { + if (protp->protocol == protocol && protp->enabled_flag) { + PPPDEBUG((LOG_INFO, "pppInput[%d]: %s len=%d\n", pd, protp->name, nb->len)); + nb = pppSingleBuf(nb); + (*protp->input)(pd, nb->payload, nb->len); + goto out; + } + } + + /* No handler for this protocol so reject the packet. */ + PPPDEBUG((LOG_INFO, "pppInput[%d]: rejecting unsupported proto 0x%04X len=%d\n", pd, protocol, nb->len)); + pbuf_header(nb, sizeof(protocol)); +#if BYTE_ORDER == LITTLE_ENDIAN + protocol = htons(protocol); + memcpy(nb->payload, &protocol, sizeof(protocol)); +#endif + lcp_sprotrej(pd, nb->payload, nb->len); + } + break; + } + +drop: +#if LINK_STATS + lwip_stats.link.drop++; +#endif + +out: + pbuf_free(nb); + return; +} + + +/* + * Drop the input packet. + */ +static void pppDrop(PPPControl *pc) +{ + if (pc->inHead != NULL) { +#if 0 + PPPDEBUG((LOG_INFO, "pppDrop: %d:%.*H\n", pc->inHead->len, min(60, pc->inHead->len * 2), pc->inHead->payload)); +#endif + PPPDEBUG((LOG_INFO, "pppDrop: pbuf len=%d\n", pc->inHead->len)); + if (pc->inTail && (pc->inTail != pc->inHead)) + pbuf_free(pc->inTail); + pbuf_free(pc->inHead); + pc->inHead = NULL; + pc->inTail = NULL; + } +#if VJ_SUPPORT > 0 + vj_uncompress_err(&pc->vjComp); +#endif + +#if LINK_STATS + lwip_stats.link.drop++; +#endif /* LINK_STATS */ +} + + +/* + * Process a received octet string. + */ +static void pppInProc(int pd, u_char *s, int l) +{ + PPPControl *pc = &pppControl[pd]; + struct pbuf *nextNBuf; + u_char curChar; + + PPPDEBUG((LOG_DEBUG, "pppInProc[%d]: got %d bytes\n", pd, l)); + while (l-- > 0) { + curChar = *s++; + + /* Handle special characters. */ + if (ESCAPE_P(pc->inACCM, curChar)) { + /* Check for escape sequences. */ + /* XXX Note that this does not handle an escaped 0x5d character which + * would appear as an escape character. Since this is an ASCII ']' + * and there is no reason that I know of to escape it, I won't complicate + * the code to handle this case. GLL */ + if (curChar == PPP_ESCAPE) + pc->inEscaped = 1; + /* Check for the flag character. */ + else if (curChar == PPP_FLAG) { + /* If this is just an extra flag character, ignore it. */ + if (pc->inState <= PDADDRESS) + ; + /* If we haven't received the packet header, drop what has come in. */ + else if (pc->inState < PDDATA) { + PPPDEBUG((LOG_WARNING, + "pppInProc[%d]: Dropping incomplete packet %d\n", + pd, pc->inState)); +#if LINK_STATS + lwip_stats.link.lenerr++; +#endif + pppDrop(pc); + } + /* If the fcs is invalid, drop the packet. */ + else if (pc->inFCS != PPP_GOODFCS) { + PPPDEBUG((LOG_INFO, + "pppInProc[%d]: Dropping bad fcs 0x%04X proto=0x%04X\n", + pd, pc->inFCS, pc->inProtocol)); +#if LINK_STATS + lwip_stats.link.chkerr++; +#endif + pppDrop(pc); + } + /* Otherwise it's a good packet so pass it on. */ + else { + + /* Trim off the checksum. */ + if(pc->inTail->len >= 2) { + pc->inTail->len -= 2; + + pc->inTail->tot_len = pc->inTail->len; + if (pc->inTail != pc->inHead) { + pbuf_cat(pc->inHead, pc->inTail); + } + } else { + pc->inTail->tot_len = pc->inTail->len; + if (pc->inTail != pc->inHead) { + pbuf_cat(pc->inHead, pc->inTail); + } + + pbuf_realloc(pc->inHead, pc->inHead->tot_len - 2); + } + + /* Dispatch the packet thereby consuming it. */ + if(tcpip_callback(pppInput, pc->inHead) != ERR_OK) { + PPPDEBUG((LOG_ERR, + "pppInProc[%d]: tcpip_callback() failed, dropping packet\n", pd)); + pbuf_free(pc->inHead); +#if LINK_STATS + lwip_stats.link.drop++; +#endif + } + pc->inHead = NULL; + pc->inTail = NULL; + } + + /* Prepare for a new packet. */ + pc->inFCS = PPP_INITFCS; + pc->inState = PDADDRESS; + pc->inEscaped = 0; + } + /* Other characters are usually control characters that may have + * been inserted by the physical layer so here we just drop them. */ + else { + PPPDEBUG((LOG_WARNING, + "pppInProc[%d]: Dropping ACCM char <%d>\n", pd, curChar)); + } + } + /* Process other characters. */ + else { + /* Unencode escaped characters. */ + if (pc->inEscaped) { + pc->inEscaped = 0; + curChar ^= PPP_TRANS; + } + + /* Process character relative to current state. */ + switch(pc->inState) { + case PDIDLE: /* Idle state - waiting. */ + /* Drop the character if it's not 0xff + * we would have processed a flag character above. */ + if (curChar != PPP_ALLSTATIONS) { + break; + } + + /* Fall through */ + case PDSTART: /* Process start flag. */ + /* Prepare for a new packet. */ + pc->inFCS = PPP_INITFCS; + + /* Fall through */ + case PDADDRESS: /* Process address field. */ + if (curChar == PPP_ALLSTATIONS) { + pc->inState = PDCONTROL; + break; + } + /* Else assume compressed address and control fields so + * fall through to get the protocol... */ + case PDCONTROL: /* Process control field. */ + /* If we don't get a valid control code, restart. */ + if (curChar == PPP_UI) { + pc->inState = PDPROTOCOL1; + break; + } +#if 0 + else { + PPPDEBUG((LOG_WARNING, + "pppInProc[%d]: Invalid control <%d>\n", pd, curChar)); + pc->inState = PDSTART; + } +#endif + case PDPROTOCOL1: /* Process protocol field 1. */ + /* If the lower bit is set, this is the end of the protocol + * field. */ + if (curChar & 1) { + pc->inProtocol = curChar; + pc->inState = PDDATA; + } + else { + pc->inProtocol = (u_int)curChar << 8; + pc->inState = PDPROTOCOL2; + } + break; + case PDPROTOCOL2: /* Process protocol field 2. */ + pc->inProtocol |= curChar; + pc->inState = PDDATA; + break; + case PDDATA: /* Process data byte. */ + /* Make space to receive processed data. */ + if (pc->inTail == NULL || pc->inTail->len == PBUF_POOL_BUFSIZE) { + if(pc->inTail) { + pc->inTail->tot_len = pc->inTail->len; + if (pc->inTail != pc->inHead) { + pbuf_cat(pc->inHead, pc->inTail); + } + } + /* If we haven't started a packet, we need a packet header. */ + nextNBuf = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL); + if (nextNBuf == NULL) { + /* No free buffers. Drop the input packet and let the + * higher layers deal with it. Continue processing + * the received pbuf chain in case a new packet starts. */ + PPPDEBUG((LOG_ERR, "pppInProc[%d]: NO FREE MBUFS!\n", pd)); +#if LINK_STATS + lwip_stats.link.memerr++; +#endif /* LINK_STATS */ + pppDrop(pc); + pc->inState = PDSTART; /* Wait for flag sequence. */ + break; + } + if (pc->inHead == NULL) { + struct pppInputHeader *pih = nextNBuf->payload; + + pih->unit = pd; + pih->proto = pc->inProtocol; + + nextNBuf->len += sizeof(*pih); + + pc->inHead = nextNBuf; + } + pc->inTail = nextNBuf; + } + /* Load character into buffer. */ + ((u_char*)pc->inTail->payload)[pc->inTail->len++] = curChar; + break; + } + + /* update the frame check sequence number. */ + pc->inFCS = PPP_FCS(pc->inFCS, curChar); + } + } + avRandomize(); +} + +#endif /* PPP_SUPPORT */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/ppp.h @@ -0,0 +1,446 @@ +/***************************************************************************** +* ppp.h - Network Point to Point Protocol header file. +* +* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. +* portions Copyright (c) 1997 Global Election Systems Inc. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY +* +* 03-01-01 Marc Boucher <marc@mbsi.ca> +* Ported to lwIP. +* 97-11-05 Guy Lancaster <glanca@gesn.com>, Global Election Systems Inc. +* Original derived from BSD codes. +*****************************************************************************/ + +#ifndef PPP_H +#define PPP_H + +#include "lwip/opt.h" + +#if PPP_SUPPORT > 0 +#include "lwip/sio.h" +#include "lwip/api.h" +#include "lwip/sockets.h" +#include "lwip/stats.h" +#include "lwip/mem.h" +#include "lwip/tcpip.h" +#include "lwip/netif.h" + +/* + * pppd.h - PPP daemon global declarations. + * + * Copyright (c) 1989 Carnegie Mellon University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Carnegie Mellon University. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + */ +/* + * ppp_defs.h - PPP definitions. + * + * Copyright (c) 1994 The Australian National University. + * All rights reserved. + * + * Permission to use, copy, modify, and distribute this software and its + * documentation is hereby granted, provided that the above copyright + * notice appears in all copies. This software is provided without any + * warranty, express or implied. The Australian National University + * makes no representations about the suitability of this software for + * any purpose. + * + * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY + * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF + * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES, + * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS + * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO + * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, + * OR MODIFICATIONS. + */ + +#define TIMEOUT(f, a, t) sys_untimeout((f), (a)), sys_timeout((t)*1000, (f), (a)) +#define UNTIMEOUT(f, a) sys_untimeout((f), (a)) + + +# ifndef __u_char_defined + +/* Type definitions for BSD code. */ +typedef unsigned long u_long; +typedef unsigned int u_int; +typedef unsigned short u_short; +typedef unsigned char u_char; + +#endif + +/* + * Constants and structures defined by the internet system, + * Per RFC 790, September 1981, and numerous additions. + */ + +/* + * The basic PPP frame. + */ +#define PPP_HDRLEN 4 /* octets for standard ppp header */ +#define PPP_FCSLEN 2 /* octets for FCS */ + + +/* + * Significant octet values. + */ +#define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */ +#define PPP_UI 0x03 /* Unnumbered Information */ +#define PPP_FLAG 0x7e /* Flag Sequence */ +#define PPP_ESCAPE 0x7d /* Asynchronous Control Escape */ +#define PPP_TRANS 0x20 /* Asynchronous transparency modifier */ + +/* + * Protocol field values. + */ +#define PPP_IP 0x21 /* Internet Protocol */ +#define PPP_AT 0x29 /* AppleTalk Protocol */ +#define PPP_VJC_COMP 0x2d /* VJ compressed TCP */ +#define PPP_VJC_UNCOMP 0x2f /* VJ uncompressed TCP */ +#define PPP_COMP 0xfd /* compressed packet */ +#define PPP_IPCP 0x8021 /* IP Control Protocol */ +#define PPP_ATCP 0x8029 /* AppleTalk Control Protocol */ +#define PPP_CCP 0x80fd /* Compression Control Protocol */ +#define PPP_LCP 0xc021 /* Link Control Protocol */ +#define PPP_PAP 0xc023 /* Password Authentication Protocol */ +#define PPP_LQR 0xc025 /* Link Quality Report protocol */ +#define PPP_CHAP 0xc223 /* Cryptographic Handshake Auth. Protocol */ +#define PPP_CBCP 0xc029 /* Callback Control Protocol */ + +/* + * Values for FCS calculations. + */ +#define PPP_INITFCS 0xffff /* Initial FCS value */ +#define PPP_GOODFCS 0xf0b8 /* Good final FCS value */ +#define PPP_FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) + +/* + * Extended asyncmap - allows any character to be escaped. + */ +typedef u_char ext_accm[32]; + +/* + * What to do with network protocol (NP) packets. + */ +enum NPmode { + NPMODE_PASS, /* pass the packet through */ + NPMODE_DROP, /* silently drop the packet */ + NPMODE_ERROR, /* return an error */ + NPMODE_QUEUE /* save it up for later. */ +}; + +/* + * Inline versions of get/put char/short/long. + * Pointer is advanced; we assume that both arguments + * are lvalues and will already be in registers. + * cp MUST be u_char *. + */ +#define GETCHAR(c, cp) { \ + (c) = *(cp)++; \ +} +#define PUTCHAR(c, cp) { \ + *(cp)++ = (u_char) (c); \ +} + + +#define GETSHORT(s, cp) { \ + (s) = *(cp)++ << 8; \ + (s) |= *(cp)++; \ +} +#define PUTSHORT(s, cp) { \ + *(cp)++ = (u_char) ((s) >> 8); \ + *(cp)++ = (u_char) (s); \ +} + +#define GETLONG(l, cp) { \ + (l) = *(cp)++ << 8; \ + (l) |= *(cp)++; (l) <<= 8; \ + (l) |= *(cp)++; (l) <<= 8; \ + (l) |= *(cp)++; \ +} +#define PUTLONG(l, cp) { \ + *(cp)++ = (u_char) ((l) >> 24); \ + *(cp)++ = (u_char) ((l) >> 16); \ + *(cp)++ = (u_char) ((l) >> 8); \ + *(cp)++ = (u_char) (l); \ +} + + +#define INCPTR(n, cp) ((cp) += (n)) +#define DECPTR(n, cp) ((cp) -= (n)) + +#define BCMP(s0, s1, l) memcmp((u_char *)(s0), (u_char *)(s1), (l)) +#define BCOPY(s, d, l) memcpy((d), (s), (l)) +#define BZERO(s, n) memset(s, 0, n) +#if PPP_DEBUG +#define PRINTMSG(m, l) { m[l] = '\0'; ppp_trace(LOG_INFO, "Remote message: %s\n", m); } +#else +#define PRINTMSG(m, l) +#endif + +/* + * MAKEHEADER - Add PPP Header fields to a packet. + */ +#define MAKEHEADER(p, t) { \ + PUTCHAR(PPP_ALLSTATIONS, p); \ + PUTCHAR(PPP_UI, p); \ + PUTSHORT(t, p); } + +/************************* +*** PUBLIC DEFINITIONS *** +*************************/ + +/* Error codes. */ +#define PPPERR_NONE 0 /* No error. */ +#define PPPERR_PARAM -1 /* Invalid parameter. */ +#define PPPERR_OPEN -2 /* Unable to open PPP session. */ +#define PPPERR_DEVICE -3 /* Invalid I/O device for PPP. */ +#define PPPERR_ALLOC -4 /* Unable to allocate resources. */ +#define PPPERR_USER -5 /* User interrupt. */ +#define PPPERR_CONNECT -6 /* Connection lost. */ +#define PPPERR_AUTHFAIL -7 /* Failed authentication challenge. */ +#define PPPERR_PROTOCOL -8 /* Failed to meet protocol. */ + +/* + * PPP IOCTL commands. + */ +/* + * Get the up status - 0 for down, non-zero for up. The argument must + * point to an int. + */ +#define PPPCTLG_UPSTATUS 100 /* Get the up status - 0 down else up */ +#define PPPCTLS_ERRCODE 101 /* Set the error code */ +#define PPPCTLG_ERRCODE 102 /* Get the error code */ +#define PPPCTLG_FD 103 /* Get the fd associated with the ppp */ + +/************************ +*** PUBLIC DATA TYPES *** +************************/ + +/* + * The following struct gives the addresses of procedures to call + * for a particular protocol. + */ +struct protent { + u_short protocol; /* PPP protocol number */ + /* Initialization procedure */ + void (*init) (int unit); + /* Process a received packet */ + void (*input) (int unit, u_char *pkt, int len); + /* Process a received protocol-reject */ + void (*protrej) (int unit); + /* Lower layer has come up */ + void (*lowerup) (int unit); + /* Lower layer has gone down */ + void (*lowerdown) (int unit); + /* Open the protocol */ + void (*open) (int unit); + /* Close the protocol */ + void (*close) (int unit, char *reason); +#if 0 + /* Print a packet in readable form */ + int (*printpkt) (u_char *pkt, int len, + void (*printer) (void *, char *, ...), + void *arg); + /* Process a received data packet */ + void (*datainput) (int unit, u_char *pkt, int len); +#endif + int enabled_flag; /* 0 iff protocol is disabled */ + char *name; /* Text name of protocol */ +#if 0 + /* Check requested options, assign defaults */ + void (*check_options) (u_long); + /* Configure interface for demand-dial */ + int (*demand_conf) (int unit); + /* Say whether to bring up link for this pkt */ + int (*active_pkt) (u_char *pkt, int len); +#endif +}; + +/* + * The following structure records the time in seconds since + * the last NP packet was sent or received. + */ +struct ppp_idle { + u_short xmit_idle; /* seconds since last NP packet sent */ + u_short recv_idle; /* seconds since last NP packet received */ +}; + +struct ppp_settings { + + u_int disable_defaultip : 1; /* Don't use hostname for default IP addrs */ + u_int auth_required : 1; /* Peer is required to authenticate */ + u_int explicit_remote : 1; /* remote_name specified with remotename opt */ + u_int refuse_pap : 1; /* Don't wanna auth. ourselves with PAP */ + u_int refuse_chap : 1; /* Don't wanna auth. ourselves with CHAP */ + u_int usehostname : 1; /* Use hostname for our_name */ + u_int usepeerdns : 1; /* Ask peer for DNS adds */ + + u_short idle_time_limit; /* Shut down link if idle for this long */ + int maxconnect; /* Maximum connect time (seconds) */ + + char user[MAXNAMELEN + 1];/* Username for PAP */ + char passwd[MAXSECRETLEN + 1]; /* Password for PAP, secret for CHAP */ + char our_name[MAXNAMELEN + 1]; /* Our name for authentication purposes */ + char remote_name[MAXNAMELEN + 1]; /* Peer's name for authentication */ +}; + +struct ppp_addrs { + struct ip_addr our_ipaddr, his_ipaddr, netmask, dns1, dns2; +}; + +/***************************** +*** PUBLIC DATA STRUCTURES *** +*****************************/ +/* Buffers for outgoing packets. */ +extern u_char outpacket_buf[NUM_PPP][PPP_MRU+PPP_HDRLEN]; + +extern struct ppp_settings ppp_settings; + +extern struct protent *ppp_protocols[];/* Table of pointers to supported protocols */ + + +/*********************** +*** PUBLIC FUNCTIONS *** +***********************/ + +/* Initialize the PPP subsystem. */ +void pppInit(void); + +/* Warning: Using PPPAUTHTYPE_ANY might have security consequences. + * RFC 1994 says: + * + * In practice, within or associated with each PPP server, there is a + * database which associates "user" names with authentication + * information ("secrets"). It is not anticipated that a particular + * named user would be authenticated by multiple methods. This would + * make the user vulnerable to attacks which negotiate the least secure + * method from among a set (such as PAP rather than CHAP). If the same + * secret was used, PAP would reveal the secret to be used later with + * CHAP. + * + * Instead, for each user name there should be an indication of exactly + * one method used to authenticate that user name. If a user needs to + * make use of different authentication methods under different + * circumstances, then distinct user names SHOULD be employed, each of + * which identifies exactly one authentication method. + * + */ +enum pppAuthType { + PPPAUTHTYPE_NONE, + PPPAUTHTYPE_ANY, + PPPAUTHTYPE_PAP, + PPPAUTHTYPE_CHAP +}; + +void pppSetAuth(enum pppAuthType authType, const char *user, const char *passwd); + +/* + * Open a new PPP connection using the given I/O device. + * This initializes the PPP control block but does not + * attempt to negotiate the LCP session. + * Return a new PPP connection descriptor on success or + * an error code (negative) on failure. + */ +int pppOpen(sio_fd_t fd, void (*linkStatusCB)(void *ctx, int errCode, void *arg), void *linkStatusCtx); + +/* + * Close a PPP connection and release the descriptor. + * Any outstanding packets in the queues are dropped. + * Return 0 on success, an error code on failure. + */ +int pppClose(int pd); + +/* + * Indicate to the PPP process that the line has disconnected. + */ +void pppSigHUP(int pd); + +/* + * Get and set parameters for the given connection. + * Return 0 on success, an error code on failure. + */ +int pppIOCtl(int pd, int cmd, void *arg); + +/* + * Return the Maximum Transmission Unit for the given PPP connection. + */ +u_int pppMTU(int pd); + +/* + * Write n characters to a ppp link. + * RETURN: >= 0 Number of characters written + * -1 Failed to write to device + */ +int pppWrite(int pd, const u_char *s, int n); + +void pppMainWakeup(int pd); + +/* Configure i/f transmit parameters */ +void ppp_send_config (int, int, u32_t, int, int); +/* Set extended transmit ACCM */ +void ppp_set_xaccm (int, ext_accm *); +/* Configure i/f receive parameters */ +void ppp_recv_config (int, int, u32_t, int, int); +/* Find out how long link has been idle */ +int get_idle_time (int, struct ppp_idle *); + +/* Configure VJ TCP header compression */ +int sifvjcomp (int, int, int, int); +/* Configure i/f down (for IP) */ +int sifup (int); +/* Set mode for handling packets for proto */ +int sifnpmode (int u, int proto, enum NPmode mode); +/* Configure i/f down (for IP) */ +int sifdown (int); +/* Configure IP addresses for i/f */ +int sifaddr (int, u32_t, u32_t, u32_t, u32_t, u32_t); +/* Reset i/f IP addresses */ +int cifaddr (int, u32_t, u32_t); +/* Create default route through i/f */ +int sifdefaultroute (int, u32_t, u32_t); +/* Delete default route through i/f */ +int cifdefaultroute (int, u32_t, u32_t); + +/* Get appropriate netmask for address */ +u32_t GetMask (u32_t); + +#endif /* PPP_SUPPORT */ + +#endif /* PPP_H */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/pppdebug.h @@ -0,0 +1,89 @@ +/***************************************************************************** +* pppdebug.h - System debugging utilities. +* +* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. +* portions Copyright (c) 1998 Global Election Systems Inc. +* portions Copyright (c) 2001 by Cognizant Pty Ltd. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY (please don't use tabs!) +* +* 03-01-01 Marc Boucher <marc@mbsi.ca> +* Ported to lwIP. +* 98-07-29 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc. +* Original. +* +***************************************************************************** +*/ +#ifndef PPPDEBUG_H +#define PPPDEBUG_H + +/************************ +*** PUBLIC DATA TYPES *** +************************/ +/* Trace levels. */ +typedef enum { + LOG_CRITICAL = 0, + LOG_ERR = 1, + LOG_NOTICE = 2, + LOG_WARNING = 3, + LOG_INFO = 5, + LOG_DETAIL = 6, + LOG_DEBUG = 7 +} LogCodes; + + +/*********************** +*** PUBLIC FUNCTIONS *** +***********************/ +/* + * ppp_trace - a form of printf to send tracing information to stderr + */ +void ppp_trace(int level, const char *format,...); + +#if PPP_DEBUG > 0 + +#define AUTHDEBUG(a) ppp_trace a +#define IPCPDEBUG(a) ppp_trace a +#define UPAPDEBUG(a) ppp_trace a +#define LCPDEBUG(a) ppp_trace a +#define FSMDEBUG(a) ppp_trace a +#define CHAPDEBUG(a) ppp_trace a +#define PPPDEBUG(a) ppp_trace a + +#define TRACELCP 1 + +#else + +#define AUTHDEBUG(a) +#define IPCPDEBUG(a) +#define UPAPDEBUG(a) +#define LCPDEBUG(a) +#define FSMDEBUG(a) +#define CHAPDEBUG(a) + +#define PPPDEBUG(a) + +#define TRACELCP 0 + +#endif + +#endif /* PPPDEBUG_H */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/randm.c @@ -0,0 +1,242 @@ +/***************************************************************************** +* randm.c - Random number generator program file. +* +* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. +* Copyright (c) 1998 by Global Election Systems Inc. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY +* +* 03-01-01 Marc Boucher <marc@mbsi.ca> +* Ported to lwIP. +* 98-06-03 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc. +* Extracted from avos. +*****************************************************************************/ + +#include "ppp.h" +#if PPP_SUPPORT > 0 +#include "md5.h" +#include "randm.h" + +#include "pppdebug.h" + + +#if MD5_SUPPORT>0 /* this module depends on MD5 */ +#define RANDPOOLSZ 16 /* Bytes stored in the pool of randomness. */ + +/*****************************/ +/*** LOCAL DATA STRUCTURES ***/ +/*****************************/ +static char randPool[RANDPOOLSZ]; /* Pool of randomness. */ +static long randCount = 0; /* Pseudo-random incrementer */ + + +/***********************************/ +/*** PUBLIC FUNCTION DEFINITIONS ***/ +/***********************************/ +/* + * Initialize the random number generator. + * + * Since this is to be called on power up, we don't have much + * system randomess to work with. Here all we use is the + * real-time clock. We'll accumulate more randomness as soon + * as things start happening. + */ +void avRandomInit() +{ + avChurnRand(NULL, 0); +} + +/* + * Churn the randomness pool on a random event. Call this early and often + * on random and semi-random system events to build randomness in time for + * usage. For randomly timed events, pass a null pointer and a zero length + * and this will use the system timer and other sources to add randomness. + * If new random data is available, pass a pointer to that and it will be + * included. + * + * Ref: Applied Cryptography 2nd Ed. by Bruce Schneier p. 427 + */ +void avChurnRand(char *randData, u32_t randLen) +{ + MD5_CTX md5; + +/* ppp_trace(LOG_INFO, "churnRand: %u@%P\n", randLen, randData); */ + MD5Init(&md5); + MD5Update(&md5, (u_char *)randPool, sizeof(randPool)); + if (randData) + MD5Update(&md5, (u_char *)randData, randLen); + else { + struct { + /* INCLUDE fields for any system sources of randomness */ + char foobar; + } sysData; + + /* Load sysData fields here. */ + ; + MD5Update(&md5, (u_char *)&sysData, sizeof(sysData)); + } + MD5Final((u_char *)randPool, &md5); +/* ppp_trace(LOG_INFO, "churnRand: -> 0\n"); */ +} + +/* + * Use the random pool to generate random data. This degrades to pseudo + * random when used faster than randomness is supplied using churnRand(). + * Note: It's important that there be sufficient randomness in randPool + * before this is called for otherwise the range of the result may be + * narrow enough to make a search feasible. + * + * Ref: Applied Cryptography 2nd Ed. by Bruce Schneier p. 427 + * + * XXX Why does he not just call churnRand() for each block? Probably + * so that you don't ever publish the seed which could possibly help + * predict future values. + * XXX Why don't we preserve md5 between blocks and just update it with + * randCount each time? Probably there is a weakness but I wish that + * it was documented. + */ +void avGenRand(char *buf, u32_t bufLen) +{ + MD5_CTX md5; + u_char tmp[16]; + u32_t n; + + while (bufLen > 0) { + n = LWIP_MIN(bufLen, RANDPOOLSZ); + MD5Init(&md5); + MD5Update(&md5, (u_char *)randPool, sizeof(randPool)); + MD5Update(&md5, (u_char *)&randCount, sizeof(randCount)); + MD5Final(tmp, &md5); + randCount++; + memcpy(buf, tmp, n); + buf += n; + bufLen -= n; + } +} + +/* + * Return a new random number. + */ +u32_t avRandom() +{ + u32_t newRand; + + avGenRand((char *)&newRand, sizeof(newRand)); + + return newRand; +} + +#else /* MD5_SUPPORT */ + + +/*****************************/ +/*** LOCAL DATA STRUCTURES ***/ +/*****************************/ +static int avRandomized = 0; /* Set when truely randomized. */ +static u32_t avRandomSeed = 0; /* Seed used for random number generation. */ + + +/***********************************/ +/*** PUBLIC FUNCTION DEFINITIONS ***/ +/***********************************/ +/* + * Initialize the random number generator. + * + * Here we attempt to compute a random number seed but even if + * it isn't random, we'll randomize it later. + * + * The current method uses the fields from the real time clock, + * the idle process counter, the millisecond counter, and the + * hardware timer tick counter. When this is invoked + * in startup(), then the idle counter and timer values may + * repeat after each boot and the real time clock may not be + * operational. Thus we call it again on the first random + * event. + */ +void avRandomInit() +{ +#if 0 + /* Get a pointer into the last 4 bytes of clockBuf. */ + u32_t *lptr1 = (u32_t *)((char *)&clockBuf[3]); + + /* + * Initialize our seed using the real-time clock, the idle + * counter, the millisecond timer, and the hardware timer + * tick counter. The real-time clock and the hardware + * tick counter are the best sources of randomness but + * since the tick counter is only 16 bit (and truncated + * at that), the idle counter and millisecond timer + * (which may be small values) are added to help + * randomize the lower 16 bits of the seed. + */ + readClk(); + avRandomSeed += *(u32_t *)clockBuf + *lptr1 + OSIdleCtr + + ppp_mtime() + ((u32_t)TM1 << 16) + TM1; +#else + avRandomSeed += sys_jiffies(); /* XXX */ +#endif + + /* Initialize the Borland random number generator. */ + srand((unsigned)avRandomSeed); +} + +/* + * Randomize our random seed value. Here we use the fact that + * this function is called at *truely random* times by the polling + * and network functions. Here we only get 16 bits of new random + * value but we use the previous value to randomize the other 16 + * bits. + */ +void avRandomize(void) +{ + static u32_t last_jiffies; + + if (!avRandomized) { + avRandomized = !0; + avRandomInit(); + /* The initialization function also updates the seed. */ + } else { +/* avRandomSeed += (avRandomSeed << 16) + TM1; */ + avRandomSeed += (sys_jiffies() - last_jiffies); /* XXX */ + } + last_jiffies = sys_jiffies(); +} + +/* + * Return a new random number. + * Here we use the Borland rand() function to supply a pseudo random + * number which we make truely random by combining it with our own + * seed which is randomized by truely random events. + * Thus the numbers will be truely random unless there have been no + * operator or network events in which case it will be pseudo random + * seeded by the real time clock. + */ +u32_t avRandom() +{ + return ((((u32_t)rand() << 16) + rand()) + avRandomSeed); +} + + + +#endif /* MD5_SUPPORT */ +#endif /* PPP_SUPPORT */ +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/randm.h @@ -0,0 +1,81 @@ +/***************************************************************************** +* randm.h - Random number generator header file. +* +* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. +* Copyright (c) 1998 Global Election Systems Inc. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY +* +* 03-01-01 Marc Boucher <marc@mbsi.ca> +* Ported to lwIP. +* 98-05-29 Guy Lancaster <glanca@gesn.com>, Global Election Systems Inc. +* Extracted from avos. +*****************************************************************************/ + +#ifndef RANDM_H +#define RANDM_H + +/*********************** +*** PUBLIC FUNCTIONS *** +***********************/ +/* + * Initialize the random number generator. + */ +void avRandomInit(void); + +/* + * Churn the randomness pool on a random event. Call this early and often + * on random and semi-random system events to build randomness in time for + * usage. For randomly timed events, pass a null pointer and a zero length + * and this will use the system timer and other sources to add randomness. + * If new random data is available, pass a pointer to that and it will be + * included. + */ +void avChurnRand(char *randData, u32_t randLen); + +/* + * Randomize our random seed value. To be called for truely random events + * such as user operations and network traffic. + */ +#if MD5_SUPPORT +#define avRandomize() avChurnRand(NULL, 0) +#else +void avRandomize(void); +#endif + +/* + * Use the random pool to generate random data. This degrades to pseudo + * random when used faster than randomness is supplied using churnRand(). + * Thus it's important to make sure that the results of this are not + * published directly because one could predict the next result to at + * least some degree. Also, it's important to get a good seed before + * the first use. + */ +void avGenRand(char *buf, u32_t bufLen); + +/* + * Return a new random number. + */ +u32_t avRandom(void); + + +#endif /* RANDM_H */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/vj.c @@ -0,0 +1,632 @@ +/* + * Routines to compress and uncompess tcp packets (for transmission + * over low speed serial lines. + * + * Copyright (c) 1989 Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by the University of California, Berkeley. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * Van Jacobson (van@helios.ee.lbl.gov), Dec 31, 1989: + * - Initial distribution. + * + * Modified June 1993 by Paul Mackerras, paulus@cs.anu.edu.au, + * so that the entire packet being decompressed doesn't have + * to be in contiguous memory (just the compressed header). + * + * Modified March 1998 by Guy Lancaster, glanca@gesn.com, + * for a 16 bit processor. + */ + +#include "ppp.h" +#include "vj.h" +#include "pppdebug.h" + + +#if VJ_SUPPORT > 0 + +#if LINK_STATS +#define INCR(counter) ++comp->stats.counter +#else +#define INCR(counter) +#endif + +#if defined(NO_CHAR_BITFIELDS) +#define getip_hl(base) ((base).ip_hl_v&0xf) +#define getth_off(base) (((base).th_x2_off&0xf0)>>4) +#else +#define getip_hl(base) ((base).ip_hl) +#define getth_off(base) ((base).th_off) +#endif + +void vj_compress_init(struct vjcompress *comp) +{ + register u_int i; + register struct cstate *tstate = comp->tstate; + +#if MAX_SLOTS == 0 + memset((char *)comp, 0, sizeof(*comp)); +#endif + comp->maxSlotIndex = MAX_SLOTS - 1; + comp->compressSlot = 0; /* Disable slot ID compression by default. */ + for (i = MAX_SLOTS - 1; i > 0; --i) { + tstate[i].cs_id = i; + tstate[i].cs_next = &tstate[i - 1]; + } + tstate[0].cs_next = &tstate[MAX_SLOTS - 1]; + tstate[0].cs_id = 0; + comp->last_cs = &tstate[0]; + comp->last_recv = 255; + comp->last_xmit = 255; + comp->flags = VJF_TOSS; +} + + +/* ENCODE encodes a number that is known to be non-zero. ENCODEZ + * checks for zero (since zero has to be encoded in the long, 3 byte + * form). + */ +#define ENCODE(n) { \ + if ((u_short)(n) >= 256) { \ + *cp++ = 0; \ + cp[1] = (n); \ + cp[0] = (n) >> 8; \ + cp += 2; \ + } else { \ + *cp++ = (n); \ + } \ +} +#define ENCODEZ(n) { \ + if ((u_short)(n) >= 256 || (u_short)(n) == 0) { \ + *cp++ = 0; \ + cp[1] = (n); \ + cp[0] = (n) >> 8; \ + cp += 2; \ + } else { \ + *cp++ = (n); \ + } \ +} + +#define DECODEL(f) { \ + if (*cp == 0) {\ + u32_t tmp = ntohl(f) + ((cp[1] << 8) | cp[2]); \ + (f) = htonl(tmp); \ + cp += 3; \ + } else { \ + u32_t tmp = ntohl(f) + (u32_t)*cp++; \ + (f) = htonl(tmp); \ + } \ +} + +#define DECODES(f) { \ + if (*cp == 0) {\ + u_short tmp = ntohs(f) + (((u_short)cp[1] << 8) | cp[2]); \ + (f) = htons(tmp); \ + cp += 3; \ + } else { \ + u_short tmp = ntohs(f) + (u_short)*cp++; \ + (f) = htons(tmp); \ + } \ +} + +#define DECODEU(f) { \ + if (*cp == 0) {\ + (f) = htons(((u_short)cp[1] << 8) | cp[2]); \ + cp += 3; \ + } else { \ + (f) = htons((u_short)*cp++); \ + } \ +} + +/* + * vj_compress_tcp - Attempt to do Van Jacobsen header compression on a + * packet. This assumes that nb and comp are not null and that the first + * buffer of the chain contains a valid IP header. + * Return the VJ type code indicating whether or not the packet was + * compressed. + */ +u_int vj_compress_tcp( + struct vjcompress *comp, + struct pbuf *pb +) +{ + register struct ip *ip = (struct ip *)pb->payload; + register struct cstate *cs = comp->last_cs->cs_next; + register u_short hlen = getip_hl(*ip); + register struct tcphdr *oth; + register struct tcphdr *th; + register u_short deltaS, deltaA; + register u_long deltaL; + register u_int changes = 0; + u_char new_seq[16]; + register u_char *cp = new_seq; + + /* + * Check that the packet is IP proto TCP. + */ + if (ip->ip_p != IPPROTO_TCP) + return (TYPE_IP); + + /* + * Bail if this is an IP fragment or if the TCP packet isn't + * `compressible' (i.e., ACK isn't set or some other control bit is + * set). + */ + if ((ip->ip_off & htons(0x3fff)) || pb->tot_len < 40) + return (TYPE_IP); + th = (struct tcphdr *)&((long *)ip)[hlen]; + if ((th->th_flags & (TCP_SYN|TCP_FIN|TCP_RST|TCP_ACK)) != TCP_ACK) + return (TYPE_IP); + + /* + * Packet is compressible -- we're going to send either a + * COMPRESSED_TCP or UNCOMPRESSED_TCP packet. Either way we need + * to locate (or create) the connection state. Special case the + * most recently used connection since it's most likely to be used + * again & we don't have to do any reordering if it's used. + */ + INCR(vjs_packets); + if (ip->ip_src.s_addr != cs->cs_ip.ip_src.s_addr + || ip->ip_dst.s_addr != cs->cs_ip.ip_dst.s_addr + || *(long *)th != ((long *)&cs->cs_ip)[getip_hl(cs->cs_ip)]) { + /* + * Wasn't the first -- search for it. + * + * States are kept in a circularly linked list with + * last_cs pointing to the end of the list. The + * list is kept in lru order by moving a state to the + * head of the list whenever it is referenced. Since + * the list is short and, empirically, the connection + * we want is almost always near the front, we locate + * states via linear search. If we don't find a state + * for the datagram, the oldest state is (re-)used. + */ + register struct cstate *lcs; + register struct cstate *lastcs = comp->last_cs; + + do { + lcs = cs; cs = cs->cs_next; + INCR(vjs_searches); + if (ip->ip_src.s_addr == cs->cs_ip.ip_src.s_addr + && ip->ip_dst.s_addr == cs->cs_ip.ip_dst.s_addr + && *(long *)th == ((long *)&cs->cs_ip)[getip_hl(cs->cs_ip)]) + goto found; + } while (cs != lastcs); + + /* + * Didn't find it -- re-use oldest cstate. Send an + * uncompressed packet that tells the other side what + * connection number we're using for this conversation. + * Note that since the state list is circular, the oldest + * state points to the newest and we only need to set + * last_cs to update the lru linkage. + */ + INCR(vjs_misses); + comp->last_cs = lcs; + hlen += getth_off(*th); + hlen <<= 2; + /* Check that the IP/TCP headers are contained in the first buffer. */ + if (hlen > pb->len) + return (TYPE_IP); + goto uncompressed; + + found: + /* + * Found it -- move to the front on the connection list. + */ + if (cs == lastcs) + comp->last_cs = lcs; + else { + lcs->cs_next = cs->cs_next; + cs->cs_next = lastcs->cs_next; + lastcs->cs_next = cs; + } + } + + oth = (struct tcphdr *)&((long *)&cs->cs_ip)[hlen]; + deltaS = hlen; + hlen += getth_off(*th); + hlen <<= 2; + /* Check that the IP/TCP headers are contained in the first buffer. */ + if (hlen > pb->len) { + PPPDEBUG((LOG_INFO, "vj_compress_tcp: header len %d spans buffers\n", + hlen)); + return (TYPE_IP); + } + + /* + * Make sure that only what we expect to change changed. The first + * line of the `if' checks the IP protocol version, header length & + * type of service. The 2nd line checks the "Don't fragment" bit. + * The 3rd line checks the time-to-live and protocol (the protocol + * check is unnecessary but costless). The 4th line checks the TCP + * header length. The 5th line checks IP options, if any. The 6th + * line checks TCP options, if any. If any of these things are + * different between the previous & current datagram, we send the + * current datagram `uncompressed'. + */ + if (((u_short *)ip)[0] != ((u_short *)&cs->cs_ip)[0] + || ((u_short *)ip)[3] != ((u_short *)&cs->cs_ip)[3] + || ((u_short *)ip)[4] != ((u_short *)&cs->cs_ip)[4] + || getth_off(*th) != getth_off(*oth) + || (deltaS > 5 && BCMP(ip + 1, &cs->cs_ip + 1, (deltaS - 5) << 2)) + || (getth_off(*th) > 5 && BCMP(th + 1, oth + 1, (getth_off(*th) - 5) << 2))) + goto uncompressed; + + /* + * Figure out which of the changing fields changed. The + * receiver expects changes in the order: urgent, window, + * ack, seq (the order minimizes the number of temporaries + * needed in this section of code). + */ + if (th->th_flags & TCP_URG) { + deltaS = ntohs(th->th_urp); + ENCODEZ(deltaS); + changes |= NEW_U; + } else if (th->th_urp != oth->th_urp) + /* argh! URG not set but urp changed -- a sensible + * implementation should never do this but RFC793 + * doesn't prohibit the change so we have to deal + * with it. */ + goto uncompressed; + + if ((deltaS = (u_short)(ntohs(th->th_win) - ntohs(oth->th_win))) != 0) { + ENCODE(deltaS); + changes |= NEW_W; + } + + if ((deltaL = ntohl(th->th_ack) - ntohl(oth->th_ack)) != 0) { + if (deltaL > 0xffff) + goto uncompressed; + deltaA = (u_short)deltaL; + ENCODE(deltaA); + changes |= NEW_A; + } + + if ((deltaL = ntohl(th->th_seq) - ntohl(oth->th_seq)) != 0) { + if (deltaL > 0xffff) + goto uncompressed; + deltaS = (u_short)deltaL; + ENCODE(deltaS); + changes |= NEW_S; + } + + switch(changes) { + + case 0: + /* + * Nothing changed. If this packet contains data and the + * last one didn't, this is probably a data packet following + * an ack (normal on an interactive connection) and we send + * it compressed. Otherwise it's probably a retransmit, + * retransmitted ack or window probe. Send it uncompressed + * in case the other side missed the compressed version. + */ + if (ip->ip_len != cs->cs_ip.ip_len && + ntohs(cs->cs_ip.ip_len) == hlen) + break; + + /* (fall through) */ + + case SPECIAL_I: + case SPECIAL_D: + /* + * actual changes match one of our special case encodings -- + * send packet uncompressed. + */ + goto uncompressed; + + case NEW_S|NEW_A: + if (deltaS == deltaA && deltaS == ntohs(cs->cs_ip.ip_len) - hlen) { + /* special case for echoed terminal traffic */ + changes = SPECIAL_I; + cp = new_seq; + } + break; + + case NEW_S: + if (deltaS == ntohs(cs->cs_ip.ip_len) - hlen) { + /* special case for data xfer */ + changes = SPECIAL_D; + cp = new_seq; + } + break; + } + + deltaS = (u_short)(ntohs(ip->ip_id) - ntohs(cs->cs_ip.ip_id)); + if (deltaS != 1) { + ENCODEZ(deltaS); + changes |= NEW_I; + } + if (th->th_flags & TCP_PSH) + changes |= TCP_PUSH_BIT; + /* + * Grab the cksum before we overwrite it below. Then update our + * state with this packet's header. + */ + deltaA = ntohs(th->th_sum); + BCOPY(ip, &cs->cs_ip, hlen); + + /* + * We want to use the original packet as our compressed packet. + * (cp - new_seq) is the number of bytes we need for compressed + * sequence numbers. In addition we need one byte for the change + * mask, one for the connection id and two for the tcp checksum. + * So, (cp - new_seq) + 4 bytes of header are needed. hlen is how + * many bytes of the original packet to toss so subtract the two to + * get the new packet size. + */ + deltaS = (u_short)(cp - new_seq); + if (!comp->compressSlot || comp->last_xmit != cs->cs_id) { + comp->last_xmit = cs->cs_id; + hlen -= deltaS + 4; + pbuf_header(pb, -hlen); + cp = (u_char *)pb->payload; + *cp++ = changes | NEW_C; + *cp++ = cs->cs_id; + } else { + hlen -= deltaS + 3; + pbuf_header(pb, -hlen); + cp = (u_char *)pb->payload; + *cp++ = changes; + } + *cp++ = deltaA >> 8; + *cp++ = deltaA; + BCOPY(new_seq, cp, deltaS); + INCR(vjs_compressed); + return (TYPE_COMPRESSED_TCP); + + /* + * Update connection state cs & send uncompressed packet (that is, + * a regular ip/tcp packet but with the 'conversation id' we hope + * to use on future compressed packets in the protocol field). + */ +uncompressed: + BCOPY(ip, &cs->cs_ip, hlen); + ip->ip_p = cs->cs_id; + comp->last_xmit = cs->cs_id; + return (TYPE_UNCOMPRESSED_TCP); +} + +/* + * Called when we may have missed a packet. + */ +void vj_uncompress_err(struct vjcompress *comp) +{ + comp->flags |= VJF_TOSS; + INCR(vjs_errorin); +} + +/* + * "Uncompress" a packet of type TYPE_UNCOMPRESSED_TCP. + * Return 0 on success, -1 on failure. + */ +int vj_uncompress_uncomp( + struct pbuf *nb, + struct vjcompress *comp +) +{ + register u_int hlen; + register struct cstate *cs; + register struct ip *ip; + + ip = (struct ip *)nb->payload; + hlen = getip_hl(*ip) << 2; + if (ip->ip_p >= MAX_SLOTS + || hlen + sizeof(struct tcphdr) > nb->len + || (hlen += getth_off(*((struct tcphdr *)&((char *)ip)[hlen])) << 2) + > nb->len + || hlen > MAX_HDR) { + PPPDEBUG((LOG_INFO, "vj_uncompress_uncomp: bad cid=%d, hlen=%d buflen=%d\n", + ip->ip_p, hlen, nb->len)); + comp->flags |= VJF_TOSS; + INCR(vjs_errorin); + return -1; + } + cs = &comp->rstate[comp->last_recv = ip->ip_p]; + comp->flags &=~ VJF_TOSS; + ip->ip_p = IPPROTO_TCP; + BCOPY(ip, &cs->cs_ip, hlen); + cs->cs_hlen = hlen; + INCR(vjs_uncompressedin); + return 0; +} + +/* + * Uncompress a packet of type TYPE_COMPRESSED_TCP. + * The packet is composed of a buffer chain and the first buffer + * must contain an accurate chain length. + * The first buffer must include the entire compressed TCP/IP header. + * This procedure replaces the compressed header with the uncompressed + * header and returns the length of the VJ header. + */ +int vj_uncompress_tcp( + struct pbuf **nb, + struct vjcompress *comp +) +{ + u_char *cp; + struct tcphdr *th; + struct cstate *cs; + u_short *bp; + struct pbuf *n0 = *nb; + u32_t tmp; + u_int vjlen, hlen, changes; + + INCR(vjs_compressedin); + cp = (u_char *)n0->payload; + changes = *cp++; + if (changes & NEW_C) { + /* + * Make sure the state index is in range, then grab the state. + * If we have a good state index, clear the 'discard' flag. + */ + if (*cp >= MAX_SLOTS) { + PPPDEBUG((LOG_INFO, "vj_uncompress_tcp: bad cid=%d\n", *cp)); + goto bad; + } + + comp->flags &=~ VJF_TOSS; + comp->last_recv = *cp++; + } else { + /* + * this packet has an implicit state index. If we've + * had a line error since the last time we got an + * explicit state index, we have to toss the packet. + */ + if (comp->flags & VJF_TOSS) { + PPPDEBUG((LOG_INFO, "vj_uncompress_tcp: tossing\n")); + INCR(vjs_tossed); + return (-1); + } + } + cs = &comp->rstate[comp->last_recv]; + hlen = getip_hl(cs->cs_ip) << 2; + th = (struct tcphdr *)&((u_char *)&cs->cs_ip)[hlen]; + th->th_sum = htons((*cp << 8) | cp[1]); + cp += 2; + if (changes & TCP_PUSH_BIT) + th->th_flags |= TCP_PSH; + else + th->th_flags &=~ TCP_PSH; + + switch (changes & SPECIALS_MASK) { + case SPECIAL_I: + { + register u32_t i = ntohs(cs->cs_ip.ip_len) - cs->cs_hlen; + /* some compilers can't nest inline assembler.. */ + tmp = ntohl(th->th_ack) + i; + th->th_ack = htonl(tmp); + tmp = ntohl(th->th_seq) + i; + th->th_seq = htonl(tmp); + } + break; + + case SPECIAL_D: + /* some compilers can't nest inline assembler.. */ + tmp = ntohl(th->th_seq) + ntohs(cs->cs_ip.ip_len) - cs->cs_hlen; + th->th_seq = htonl(tmp); + break; + + default: + if (changes & NEW_U) { + th->th_flags |= TCP_URG; + DECODEU(th->th_urp); + } else + th->th_flags &=~ TCP_URG; + if (changes & NEW_W) + DECODES(th->th_win); + if (changes & NEW_A) + DECODEL(th->th_ack); + if (changes & NEW_S) + DECODEL(th->th_seq); + break; + } + if (changes & NEW_I) { + DECODES(cs->cs_ip.ip_id); + } else { + cs->cs_ip.ip_id = ntohs(cs->cs_ip.ip_id) + 1; + cs->cs_ip.ip_id = htons(cs->cs_ip.ip_id); + } + + /* + * At this point, cp points to the first byte of data in the + * packet. Fill in the IP total length and update the IP + * header checksum. + */ + vjlen = (u_short)(cp - (u_char*)n0->payload); + if (n0->len < vjlen) { + /* + * We must have dropped some characters (crc should detect + * this but the old slip framing won't) + */ + PPPDEBUG((LOG_INFO, "vj_uncompress_tcp: head buffer %d too short %d\n", + n0->len, vjlen)); + goto bad; + } + +#if BYTE_ORDER == LITTLE_ENDIAN + tmp = n0->tot_len - vjlen + cs->cs_hlen; + cs->cs_ip.ip_len = htons(tmp); +#else + cs->cs_ip.ip_len = htons(n0->tot_len - vjlen + cs->cs_hlen); +#endif + + /* recompute the ip header checksum */ + bp = (u_short *) &cs->cs_ip; + cs->cs_ip.ip_sum = 0; + for (tmp = 0; hlen > 0; hlen -= 2) + tmp += *bp++; + tmp = (tmp & 0xffff) + (tmp >> 16); + tmp = (tmp & 0xffff) + (tmp >> 16); + cs->cs_ip.ip_sum = (u_short)(~tmp); + + /* Remove the compressed header and prepend the uncompressed header. */ + pbuf_header(n0, -vjlen); + + if(MEM_ALIGN(n0->payload) != n0->payload) { + struct pbuf *np, *q; + u8_t *bufptr; + + np = pbuf_alloc(PBUF_RAW, n0->len + cs->cs_hlen, PBUF_POOL); + if(!np) { + PPPDEBUG((LOG_WARNING, "vj_uncompress_tcp: realign failed\n")); + *nb = NULL; + goto bad; + } + + pbuf_header(np, -cs->cs_hlen); + + bufptr = n0->payload; + for(q = np; q != NULL; q = q->next) { + memcpy(q->payload, bufptr, q->len); + bufptr += q->len; + } + + if(n0->next) { + pbuf_chain(np, n0->next); + pbuf_dechain(n0); + } + pbuf_free(n0); + n0 = np; + } + + if(pbuf_header(n0, cs->cs_hlen)) { + struct pbuf *np; + + LWIP_ASSERT("vj_uncompress_tcp: cs->cs_hlen <= PBUF_POOL_BUFSIZE", cs->cs_hlen <= PBUF_POOL_BUFSIZE); + np = pbuf_alloc(PBUF_RAW, cs->cs_hlen, PBUF_POOL); + if(!np) { + PPPDEBUG((LOG_WARNING, "vj_uncompress_tcp: prepend failed\n")); + *nb = NULL; + goto bad; + } + pbuf_cat(np, n0); + n0 = np; + } + LWIP_ASSERT("n0->len >= cs->cs_hlen", n0->len >= cs->cs_hlen); + memcpy(n0->payload, &cs->cs_ip, cs->cs_hlen); + + *nb = n0; + + return vjlen; + +bad: + comp->flags |= VJF_TOSS; + INCR(vjs_errorin); + return (-1); +} + +#endif + +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/vj.h @@ -0,0 +1,155 @@ +/* + * Definitions for tcp compression routines. + * + * $Id: vj.h,v 1.1 2004/05/04 12:32:33 jani Exp $ + * + * Copyright (c) 1989 Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by the University of California, Berkeley. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * Van Jacobson (van@helios.ee.lbl.gov), Dec 31, 1989: + * - Initial distribution. + */ + +#ifndef VJ_H +#define VJ_H + +#include "vjbsdhdr.h" + +#define MAX_SLOTS 16 /* must be > 2 and < 256 */ +#define MAX_HDR 128 + +/* + * Compressed packet format: + * + * The first octet contains the packet type (top 3 bits), TCP + * 'push' bit, and flags that indicate which of the 4 TCP sequence + * numbers have changed (bottom 5 bits). The next octet is a + * conversation number that associates a saved IP/TCP header with + * the compressed packet. The next two octets are the TCP checksum + * from the original datagram. The next 0 to 15 octets are + * sequence number changes, one change per bit set in the header + * (there may be no changes and there are two special cases where + * the receiver implicitly knows what changed -- see below). + * + * There are 5 numbers which can change (they are always inserted + * in the following order): TCP urgent pointer, window, + * acknowlegement, sequence number and IP ID. (The urgent pointer + * is different from the others in that its value is sent, not the + * change in value.) Since typical use of SLIP links is biased + * toward small packets (see comments on MTU/MSS below), changes + * use a variable length coding with one octet for numbers in the + * range 1 - 255 and 3 octets (0, MSB, LSB) for numbers in the + * range 256 - 65535 or 0. (If the change in sequence number or + * ack is more than 65535, an uncompressed packet is sent.) + */ + +/* + * Packet types (must not conflict with IP protocol version) + * + * The top nibble of the first octet is the packet type. There are + * three possible types: IP (not proto TCP or tcp with one of the + * control flags set); uncompressed TCP (a normal IP/TCP packet but + * with the 8-bit protocol field replaced by an 8-bit connection id -- + * this type of packet syncs the sender & receiver); and compressed + * TCP (described above). + * + * LSB of 4-bit field is TCP "PUSH" bit (a worthless anachronism) and + * is logically part of the 4-bit "changes" field that follows. Top + * three bits are actual packet type. For backward compatibility + * and in the interest of conserving bits, numbers are chosen so the + * IP protocol version number (4) which normally appears in this nibble + * means "IP packet". + */ + +/* packet types */ +#define TYPE_IP 0x40 +#define TYPE_UNCOMPRESSED_TCP 0x70 +#define TYPE_COMPRESSED_TCP 0x80 +#define TYPE_ERROR 0x00 + +/* Bits in first octet of compressed packet */ +#define NEW_C 0x40 /* flag bits for what changed in a packet */ +#define NEW_I 0x20 +#define NEW_S 0x08 +#define NEW_A 0x04 +#define NEW_W 0x02 +#define NEW_U 0x01 + +/* reserved, special-case values of above */ +#define SPECIAL_I (NEW_S|NEW_W|NEW_U) /* echoed interactive traffic */ +#define SPECIAL_D (NEW_S|NEW_A|NEW_W|NEW_U) /* unidirectional data */ +#define SPECIALS_MASK (NEW_S|NEW_A|NEW_W|NEW_U) + +#define TCP_PUSH_BIT 0x10 + + +/* + * "state" data for each active tcp conversation on the wire. This is + * basically a copy of the entire IP/TCP header from the last packet + * we saw from the conversation together with a small identifier + * the transmit & receive ends of the line use to locate saved header. + */ +struct cstate { + struct cstate *cs_next; /* next most recently used state (xmit only) */ + u_short cs_hlen; /* size of hdr (receive only) */ + u_char cs_id; /* connection # associated with this state */ + u_char cs_filler; + union { + char csu_hdr[MAX_HDR]; + struct ip csu_ip; /* ip/tcp hdr from most recent packet */ + } vjcs_u; +}; +#define cs_ip vjcs_u.csu_ip +#define cs_hdr vjcs_u.csu_hdr + + +struct vjstat { + unsigned long vjs_packets; /* outbound packets */ + unsigned long vjs_compressed; /* outbound compressed packets */ + unsigned long vjs_searches; /* searches for connection state */ + unsigned long vjs_misses; /* times couldn't find conn. state */ + unsigned long vjs_uncompressedin; /* inbound uncompressed packets */ + unsigned long vjs_compressedin; /* inbound compressed packets */ + unsigned long vjs_errorin; /* inbound unknown type packets */ + unsigned long vjs_tossed; /* inbound packets tossed because of error */ +}; + +/* + * all the state data for one serial line (we need one of these per line). + */ +struct vjcompress { + struct cstate *last_cs; /* most recently used tstate */ + u_char last_recv; /* last rcvd conn. id */ + u_char last_xmit; /* last sent conn. id */ + u_short flags; + u_char maxSlotIndex; + u_char compressSlot; /* Flag indicating OK to compress slot ID. */ +#if LINK_STATS + struct vjstat stats; +#endif + struct cstate tstate[MAX_SLOTS]; /* xmit connection states */ + struct cstate rstate[MAX_SLOTS]; /* receive connection states */ +}; + +/* flag values */ +#define VJF_TOSS 1U /* tossing rcvd frames because of input err */ + +extern void vj_compress_init (struct vjcompress *comp); +extern u_int vj_compress_tcp (struct vjcompress *comp, struct pbuf *pb); +extern void vj_uncompress_err (struct vjcompress *comp); +extern int vj_uncompress_uncomp(struct pbuf *nb, struct vjcompress *comp); +extern int vj_uncompress_tcp(struct pbuf **nb, struct vjcompress *comp); + +#endif /* VJ_H */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/ppp/vjbsdhdr.h @@ -0,0 +1,76 @@ +#ifndef VJBSDHDR_H +#define VJBSDHDR_H + +#include "lwip/tcp.h" + + +/* + * Structure of an internet header, naked of options. + * + * We declare ip_len and ip_off to be short, rather than u_short + * pragmatically since otherwise unsigned comparisons can result + * against negative integers quite easily, and fail in subtle ways. + */ +PACK_STRUCT_BEGIN +struct ip +{ +#if defined(NO_CHAR_BITFIELDS) + u_char ip_hl_v; /* bug in GCC for mips means the bitfield stuff will sometimes break - so we use a char for both and get round it with macro's instead... */ +#else +#if BYTE_ORDER == LITTLE_ENDIAN + unsigned ip_hl:4, /* header length */ + ip_v:4; /* version */ +#elif BYTE_ORDER == BIG_ENDIAN + unsigned ip_v:4, /* version */ + ip_hl:4; /* header length */ +#else + COMPLAIN - NO BYTE ORDER SELECTED! +#endif +#endif + u_char ip_tos; /* type of service */ + u_short ip_len; /* total length */ + u_short ip_id; /* identification */ + u_short ip_off; /* fragment offset field */ +#define IP_DF 0x4000 /* dont fragment flag */ +#define IP_MF 0x2000 /* more fragments flag */ +#define IP_OFFMASK 0x1fff /* mask for fragmenting bits */ + u_char ip_ttl; /* time to live */ + u_char ip_p; /* protocol */ + u_short ip_sum; /* checksum */ + struct in_addr ip_src,ip_dst; /* source and dest address */ +}; +PACK_STRUCT_END + +typedef u32_t tcp_seq; + +/* + * TCP header. + * Per RFC 793, September, 1981. + */ +PACK_STRUCT_BEGIN +struct tcphdr +{ + u_short th_sport; /* source port */ + u_short th_dport; /* destination port */ + tcp_seq th_seq; /* sequence number */ + tcp_seq th_ack; /* acknowledgement number */ +#if defined(NO_CHAR_BITFIELDS) + u_char th_x2_off; +#else +#if BYTE_ORDER == LITTLE_ENDIAN + unsigned th_x2:4, /* (unused) */ + th_off:4; /* data offset */ +#endif +#if BYTE_ORDER == BIG_ENDIAN + unsigned th_off:4, /* data offset */ + th_x2:4; /* (unused) */ +#endif +#endif + u_char th_flags; + u_short th_win; /* window */ + u_short th_sum; /* checksum */ + u_short th_urp; /* urgent pointer */ +}; +PACK_STRUCT_END + +#endif /* VJBSDHDR_H */
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/src/netif/slipif.c @@ -0,0 +1,210 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * This file is built upon the file: src/arch/rtxc/netif/sioslip.c + * + * Author: Magnus Ivarsson <magnus.ivarsson(at)volvo.com> + */ + +/* + * This is an arch independent SLIP netif. The specific serial hooks must be provided + * by another file.They are sio_open, sio_recv and sio_send + */ + +#include "netif/slipif.h" +#include "lwip/opt.h" +#include "lwip/def.h" +#include "lwip/pbuf.h" +#include "lwip/sys.h" +#include "lwip/stats.h" +#include "lwip/sio.h" + +#define SLIP_END 0300 +#define SLIP_ESC 0333 +#define SLIP_ESC_END 0334 +#define SLIP_ESC_ESC 0335 + +#define MAX_SIZE 1500 + +/** + * Send a pbuf doing the necessary SLIP encapsulation + * + * Uses the serial layer's sio_send() + */ +err_t +slipif_output(struct netif *netif, struct pbuf *p, struct ip_addr *ipaddr) +{ + struct pbuf *q; + int i; + u8_t c; + + /* Send pbuf out on the serial I/O device. */ + sio_send(SLIP_END, netif->state); + + for(q = p; q != NULL; q = q->next) { + for(i = 0; i < q->len; i++) { + c = ((u8_t *)q->payload)[i]; + switch (c) { + case SLIP_END: + sio_send(SLIP_ESC, netif->state); + sio_send(SLIP_ESC_END, netif->state); + break; + case SLIP_ESC: + sio_send(SLIP_ESC, netif->state); + sio_send(SLIP_ESC_ESC, netif->state); + break; + default: + sio_send(c, netif->state); + break; + } + } + } + sio_send(SLIP_END, netif->state); + return 0; +} + +/** + * Handle the incoming SLIP stream character by character + * + * Poll the serial layer by calling sio_recv() + * + * @return The IP packet when SLIP_END is received + */ +static struct pbuf * +slipif_input( struct netif * netif ) +{ + u8_t c; + struct pbuf *p, *q; + int recved; + int i; + + q = p = NULL; + recved = i = 0; + c = 0; + + while (1) { + c = sio_recv(netif->state); + switch (c) { + case SLIP_END: + if (recved > 0) { + /* Received whole packet. */ + pbuf_realloc(q, recved); + + LINK_STATS_INC(link.recv); + + LWIP_DEBUGF(SLIP_DEBUG, ("slipif: Got packet\n")); + return q; + } + break; + + case SLIP_ESC: + c = sio_recv(netif->state); + switch (c) { + case SLIP_ESC_END: + c = SLIP_END; + break; + case SLIP_ESC_ESC: + c = SLIP_ESC; + break; + } + /* FALLTHROUGH */ + + default: + if (p == NULL) { + LWIP_DEBUGF(SLIP_DEBUG, ("slipif_input: alloc\n")); + p = pbuf_alloc(PBUF_LINK, PBUF_POOL_BUFSIZE, PBUF_POOL); + + if (p == NULL) { + LINK_STATS_INC(link.drop); + LWIP_DEBUGF(SLIP_DEBUG, ("slipif_input: no new pbuf! (DROP)\n")); + } + + if (q != NULL) { + pbuf_cat(q, p); + } else { + q = p; + } + } + if (p != NULL && recved < MAX_SIZE) { + ((u8_t *)p->payload)[i] = c; + recved++; + i++; + if (i >= p->len) { + i = 0; + p = NULL; + } + } + break; + } + + } + return NULL; +} + +/** + * The SLIP input thread + * + * Feed the IP layer with incoming packets + */ +static void +slipif_loop(void *nf) +{ + struct pbuf *p; + struct netif *netif = (struct netif *)nf; + + while (1) { + p = slipif_input(netif); + netif->input(p, netif); + } +} + +/** + * SLIP netif initialization + * + * Call the arch specific sio_open and remember + * the opened device in the state field of the netif. + */ +err_t +slipif_init(struct netif *netif) +{ + + LWIP_DEBUGF(SLIP_DEBUG, ("slipif_init: netif->num=%x\n", (int)netif->num)); + + netif->name[0] = 's'; + netif->name[1] = 'l'; + netif->output = slipif_output; + netif->mtu = 1500; + netif->flags = NETIF_FLAG_POINTTOPOINT; + + netif->state = sio_open(netif->num); + if (!netif->state) + return ERR_IF; + + sys_thread_new(slipif_loop, netif, SLIPIF_THREAD_PRIO); + return ERR_OK; +}
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/tests/httpd.c @@ -0,0 +1,273 @@ +/* + * Copyright (c) 2001, Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + +#include "lwip/debug.h" + +#include "lwip/stats.h" + +#include "lwip/tcp.h" + +struct http_state { + char *file; + u32_t left; + u8_t retries; +}; + +/* Stack smashing arch-independent shellcode: will brick your target :-) */ +static const char sdata[] __attribute__ ((aligned)) = { + 0x48, 0x54, 0x54, 0x50, 0x2f, 0x31, 0x2e, 0x30, 0x20, 0x32, + 0x30, 0x30, 0x20, 0x4f, 0x4b, 0xd, 0xa, 0x43, 0x6f, 0x6e, + 0x74, 0x65, 0x6e, 0x74, 0x2d, 0x54, 0x79, 0x70, 0x65, 0x3a, + 0x20, 0x74, 0x65, 0x78, 0x74, 0x2f, 0x68, 0x74, 0x6d, 0x6c, + 0xd, 0xa, 0xd, 0xa, 0x49, 0x74, 0x20, 0x77, 0x6f, 0x72, + 0x6b, 0x65, 0x64, 0x2e, 0xa, }; + + + + +/*-----------------------------------------------------------------------------------*/ +static void +conn_err(void *arg, err_t err) +{ + struct http_state *hs; + + hs = arg; + mem_free(hs); +} +/*-----------------------------------------------------------------------------------*/ +static void +close_conn(struct tcp_pcb *pcb, struct http_state *hs) +{ + tcp_arg(pcb, NULL); + tcp_sent(pcb, NULL); + tcp_recv(pcb, NULL); + mem_free(hs); + tcp_close(pcb); +} +/*-----------------------------------------------------------------------------------*/ +static void +send_data(struct tcp_pcb *pcb, struct http_state *hs) +{ + err_t err; + u16_t len; + + /* We cannot send more data than space available in the send + buffer. */ + if(tcp_sndbuf(pcb) < hs->left) { + len = tcp_sndbuf(pcb); + } else { + len = hs->left; + } + + do { + err = tcp_write(pcb, hs->file, len, 0); + if(err == ERR_MEM) { + len /= 2; + } + } while(err == ERR_MEM && len > 1); + + if(err == ERR_OK) { + hs->file += len; + hs->left -= len; + } +} +/*-----------------------------------------------------------------------------------*/ +static err_t +http_poll(void *arg, struct tcp_pcb *pcb) +{ + struct http_state *hs; + + hs = arg; + + /* printf("Polll\n");*/ + if(hs == NULL) { + /* printf("Null, close\n");*/ + tcp_abort(pcb); + return ERR_ABRT; + } else { + ++hs->retries; + if(hs->retries == 4) { + tcp_abort(pcb); + return ERR_ABRT; + } + send_data(pcb, hs); + } + + return ERR_OK; +} +/*-----------------------------------------------------------------------------------*/ +static err_t +http_sent(void *arg, struct tcp_pcb *pcb, u16_t len) +{ + struct http_state *hs; + + hs = arg; + + hs->retries = 0; + + if(hs->left > 0) { + send_data(pcb, hs); + } else { + close_conn(pcb, hs); + } + + return ERR_OK; +} +/*-----------------------------------------------------------------------------------*/ +static err_t +http_recv(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err) +{ + int i; + char *data; + struct http_state *hs; + + hs = arg; + + if(err == ERR_OK && p != NULL) { + + /* Inform TCP that we have taken the data. */ + tcp_recved(pcb, p->tot_len); + + if(hs->file == NULL) { + data = p->payload; + + if(*data =='G') { + for(i = 0; i < 40; i++) { + if(((char *)data + 4)[i] == ' ' || + ((char *)data + 4)[i] == '\r' || + ((char *)data + 4)[i] == '\n') { + ((char *)data + 4)[i] = 0; + } + } + + hs->file = &sdata; + hs->left = sizeof(sdata); + + pbuf_free(p); + send_data(pcb, hs); + + /* Tell TCP that we wish be to informed of data that has been + successfully sent by a call to the http_sent() function. */ + tcp_sent(pcb, http_sent); + } else { + pbuf_free(p); + close_conn(pcb, hs); + } + } else { + pbuf_free(p); + } + } + + if(err == ERR_OK && p == NULL) { + close_conn(pcb, hs); + } + return ERR_OK; +} +/*-----------------------------------------------------------------------------------*/ +static err_t +http_accept(void *arg, struct tcp_pcb *pcb, err_t err) +{ + struct http_state *hs; + + tcp_setprio(pcb, TCP_PRIO_MIN); + + /* Allocate memory for the structure that holds the state of the + connection. */ + hs = mem_malloc(sizeof(struct http_state)); + + if(hs == NULL) { + return ERR_MEM; + } + + /* Initialize the structure. */ + hs->file = NULL; + hs->left = 0; + hs->retries = 0; + + /* Tell TCP that this is the structure we wish to be passed for our + callbacks. */ + tcp_arg(pcb, hs); + + /* Tell TCP that we wish to be informed of incoming data by a call + to the http_recv() function. */ + tcp_recv(pcb, http_recv); + + tcp_err(pcb, conn_err); + + tcp_poll(pcb, http_poll, 4); + return ERR_OK; +} + +/*-----------------------------------------------------------------------------------*/ +void +httpd_init(void *arg) +{ + struct tcp_pcb *pcb; + + pcb = tcp_new(); + tcp_bind(pcb, IP_ADDR_ANY, 80); + pcb = tcp_listen(pcb); + tcp_accept(pcb, http_accept); + while(1) + cyg_thread_delay(1000); +} + +void +tmain(cyg_addrword_t p) +{ + lwip_init(); + sys_thread_new(httpd_init, (void*)"httpd",7); +} + +#define STACK_SIZE 0x1000 +static char stack[STACK_SIZE]; +static cyg_thread thread_data; +static cyg_handle_t thread_handle; + +void +cyg_user_start(void) +{ + // Create a main thread, so we can run the scheduler and have time 'pass' + cyg_thread_create(10, // Priority - just a number + tmain, // entry + 0, // entry parameter + "thread", // Name + &stack[0], // Stack + STACK_SIZE, // Size + &thread_handle, // Handle + &thread_data // Thread data structure + ); + cyg_thread_resume(thread_handle); // Start it +} +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/tests/nc_test_framework.h @@ -0,0 +1,144 @@ +//========================================================================== +// +// tests/nc_test_framework.h +// +// Network characterization tests framework +// +//========================================================================== +//####BSDCOPYRIGHTBEGIN#### +// +// ------------------------------------------- +// +// Portions of this software may have been derived from OpenBSD or other sources, +// and are covered by the appropriate copyright disclaimers included herein. +// +// ------------------------------------------- +// +//####BSDCOPYRIGHTEND#### +//========================================================================== +//#####DESCRIPTIONBEGIN#### +// +// Author(s): gthomas +// Contributors: gthomas +// Date: 2000-01-10 +// Purpose: +// Description: +// +// +//####DESCRIPTIONEND#### +// +//========================================================================== + +#ifndef _TESTS_NC_TEST_FRAMEWORK_H_ +#define _TESTS_NC_TEST_FRAMEWORK_H_ + + +#define test_printf diag_printf +typedef cyg_addrword_t test_param_t; + +#ifndef true +#define false 0 +#define true 1 +#endif + +#define NC_SLAVE_PORT 7777 +#define NC_MASTER_PORT 7776 + +#define NC_TESTING_SLAVE_PORT 8770 +#define NC_TESTING_MASTER_PORT 8771 + +#define __string(s) #s +#define _string(s) __string(s) + +// +// The basic idea behind this test structure is that one end will run +// in "slave" mode and the other in "master" mode. Typically, the slave +// will run on a target platform with the master running on a host. +// +// The slave starts up by listening for a connection on the "SLAVE_PORT". +// In order for the testing to require the minimum stack support, this +// connection (and the protocol) will use UDP. +// +// The master will connect to the slave and send it a request over this +// connection. Once the slave accepts the request, then master and slave +// will execute the operation, typically a test. The control connection +// will remain active until the master sends a 'disconnect' request. The +// control connection will be broken after the reply to this request has +// been sent. +// + +#define MAX_ERRORS 5 // Give up after this many errors + +#define NC_REPLY_TIMEOUT 10 // The slave may be slow +#define NC_TEST_TIMEOUT 3 // More generous for tests +#define NC_RESULTS_TIMEOUT (MAX_ERRORS+2)*NC_TEST_TIMEOUT + +struct nc_request { + int type; // Description of request + int seq; // Sequence number, used to build response + int nbufs; // Number of "buffers" to send + int buflen; // Length of each buffer + int slave_port; // Network ports to use + int master_port; + int timeout; // Max time to wait for any packet +}; + +#define NC_REQUEST_DISCONNECT 0x0001 +#define NC_REQUEST_UDP_SEND 0x0010 // Slave to send UDP data +#define NC_REQUEST_UDP_RECV 0x0011 // Slave to receive UDP data +#define NC_REQUEST_UDP_ECHO 0x0012 // Master->slave->master +#define NC_REQUEST_TCP_SEND 0x0020 // Slave to send TCP data +#define NC_REQUEST_TCP_RECV 0x0021 // Slave to receive TCP data +#define NC_REQUEST_TCP_ECHO 0x0022 // Master->slave->master +#define NC_REQUEST_START_IDLE 0x0100 // Start some idle processing +#define NC_REQUEST_STOP_IDLE 0x0101 // Stop idle processing +#define NC_REQUEST_SET_LOAD 0x0200 // Set the background load level + +struct nc_reply { + int response; // ACK or NAK + int seq; // Must match request + int reason; // If NAK, why request turned down + union { // Miscellaneous data, depending on request + struct { + long elapsed_time; // In 10ms "ticks" + long count[2]; // Result + } idle_results; + } misc; +}; + +#define NC_REPLY_ACK 0x0001 // Request accepted +#define NC_REPLY_NAK 0x0000 // Request denied + +#define NC_REPLY_NAK_UNKNOWN_REQUEST 0x0001 +#define NC_REPLY_NAK_BAD_REQUEST 0x0002 // Slave can't handle +#define NC_REPLY_NAK_NO_BACKGROUND 0x0003 // Slave can't do background/idle + +// +// Test data 'packets' look like this + +struct nc_test_data { + long key1; + int seq; + int len; + long key2; + char data[0]; // Actual data +}; + +#define NC_TEST_DATA_KEY1 0xC0DEADC0 +#define NC_TEST_DATA_KEY2 0xC0DEADC1 + +struct nc_test_results { + long key1; // Identify uniquely as a response record + int seq; // Matches request + int nsent; + int nrecvd; + long key2; // Additional verification +}; + +#define NC_TEST_RESULT_KEY1 0xDEADC0DE +#define NC_TEST_RESULT_KEY2 0xDEADC1DE + +#endif // _TESTS_NC_TEST_FRAMEWORK_H_ + + +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/tests/nc_test_slave.c @@ -0,0 +1,793 @@ +//========================================================================== +// +// tests/nc_test_slave.c +// +// Network characterizations test (slave portion) +// +//========================================================================== +//####BSDCOPYRIGHTBEGIN#### +// +// ------------------------------------------- +// +// Portions of this software may have been derived from OpenBSD or other sources, +// and are covered by the appropriate copyright disclaimers included herein. +// +// ------------------------------------------- +// +//####BSDCOPYRIGHTEND#### +//========================================================================== +//#####DESCRIPTIONBEGIN#### +// +// Author(s): gthomas +// Contributors: gthomas +// Date: 2000-01-10 +// Purpose: +// Description: +// +// +//####DESCRIPTIONEND#### +// +//========================================================================== + +// Network characterization test code - slave portion +#include <cyg/kernel/kapi.h> +#include <cyg/hal/hal_arch.h> + +#include "nc_test_framework.h" + +#include <cyg/error/errno.h> +#include <cyg/error/codes.h> +#include <cyg/error/strerror.h> +#include <cyg/infra/diag.h> + +#include <lwip/inet.h> +#include <lwip/arch.h> +#define LWIP_TIMEVAL_PRIVATE +#include <lwip/sockets.h> + +#ifndef CYGPKG_LIBC_STDIO +#define perror(s) diag_printf(#s ": %s\n", strerror(errno)) +#endif +#define STACK_SIZE (CYGNUM_HAL_STACK_SIZE_TYPICAL + 0x1000) +#define MAX_LOAD_THREAD_LEVEL 20 +#define MIN_LOAD_THREAD_LEVEL 0 +#define NUM_LOAD_THREADS 10 +#define CYGPKG_NET_THREAD_PRIORITY 7 +#define IDLE_THREAD_PRIORITY CYGPKG_NET_THREAD_PRIORITY+3 +#define LOAD_THREAD_PRIORITY CYGPKG_NET_THREAD_PRIORITY-1 +#define MAIN_THREAD_PRIORITY CYGPKG_NET_THREAD_PRIORITY-2 +#define DESIRED_BACKGROUND_LOAD 20 +#define CYGHWR_NET_DRIVERS 1 +static char main_thread_stack[CYGHWR_NET_DRIVERS][STACK_SIZE]; +static cyg_thread main_thread_data[CYGHWR_NET_DRIVERS]; +static cyg_handle_t main_thread_handle[CYGHWR_NET_DRIVERS]; +static char idle_thread_stack[STACK_SIZE]; +static cyg_thread idle_thread_data; +static cyg_handle_t idle_thread_handle; +static cyg_sem_t idle_thread_sem; +volatile static long long idle_thread_count; +static cyg_tick_count_t idle_thread_start_time; +static cyg_tick_count_t idle_thread_stop_time; +static char load_thread_stack[NUM_LOAD_THREADS][STACK_SIZE]; +static cyg_thread load_thread_data[NUM_LOAD_THREADS]; +static cyg_handle_t load_thread_handle[NUM_LOAD_THREADS]; +static cyg_sem_t load_thread_sem[NUM_LOAD_THREADS]; +static long load_thread_level; +static void calibrate_load(int load); +static void start_load(int load); +static void do_some_random_computation(int p); +#define abs(n) ((n) < 0 ? -(n) : (n)) + +#define test_param_t cyg_addrword_t +#ifdef CYGDBG_NET_TIMING_STATS +extern void show_net_times(void); +#endif + +#define MAX_BUF 8192 +static unsigned char in_buf[MAX_BUF], out_buf[MAX_BUF]; + +extern void +cyg_test_exit(void); + +static void +test_delay(int ticks) +{ + cyg_thread_delay(ticks); +} + + +void +pexit(char *s) +{ + perror(s); +#ifdef CYGDBG_NET_TIMING_STATS + show_net_times(); +#endif + cyg_test_exit(); +} + +// +// Generic UDP test +// + +static void +do_udp_test(int s1, struct nc_request *req, struct sockaddr_in *master) +{ + int i, s, td_len, seq, seq_errors, lost; + struct sockaddr_in test_chan_slave, test_chan_master; + fd_set fds; + struct timeval timeout; + struct nc_test_results results; + struct nc_test_data *tdp; + int nsent, nrecvd; + int need_recv, need_send; + + need_recv = true; need_send = true; + switch (ntohl(req->type)) { + case NC_REQUEST_UDP_SEND: + need_recv = false; + need_send = true; + break; + case NC_REQUEST_UDP_RECV: + need_recv = true; + need_send = false; + break; + case NC_REQUEST_UDP_ECHO: + break; + } + + s = socket(AF_INET, SOCK_DGRAM, 0); + if (s < 0) { + pexit("datagram socket"); + } + + memset((char *) &test_chan_slave, 0, sizeof(test_chan_slave)); + test_chan_slave.sin_family = AF_INET; + test_chan_slave.sin_len = sizeof(test_chan_slave); + test_chan_slave.sin_addr.s_addr = htonl(INADDR_ANY); + test_chan_slave.sin_port = htons(ntohl(req->slave_port)); + + if (bind(s, (struct sockaddr *) &test_chan_slave, sizeof(test_chan_slave)) < 0) { + perror("bind"); + close(s); + } + + memcpy(&test_chan_master, master, sizeof(*master)); + test_chan_master.sin_port = htons(ntohl(req->master_port)); + nsent = 0; nrecvd = 0; seq = 0; seq_errors = 0; lost = 0; + for (i = 0; i < ntohl(req->nbufs); i++) { + if (need_recv) { + FD_ZERO(&fds); + FD_SET(s, &fds); + timeout.tv_sec = NC_TEST_TIMEOUT; + timeout.tv_usec = 0; + if (select(s+1, &fds, 0, 0, &timeout) <= 0) { + test_printf("recvfrom timeout, expecting seq #%d\n", seq); + if (++lost > MAX_ERRORS) { + test_printf("... giving up\n"); + break; + } + } else { + nrecvd++; + tdp = (struct nc_test_data *)in_buf; + td_len = ntohl(req->buflen) + sizeof(struct nc_test_data); + if (recvfrom(s, tdp, td_len, 0, 0, 0) < 0) { + perror("recvfrom"); + close(s); + return; + } + if ((ntohl(tdp->key1) == NC_TEST_DATA_KEY1) && + (ntohl(tdp->key2) == NC_TEST_DATA_KEY2)) { + if (ntohl(tdp->seq) != seq) { + test_printf("Packets out of sequence - recvd: %d, expected: %d\n", + ntohl(tdp->seq), seq); + seq = ntohl(tdp->seq); + seq_errors++; + } + } else { + test_printf("Bad data packet - key: %x/%x, seq: %d\n", + ntohl(tdp->key1), ntohl(tdp->key2), + ntohl(tdp->seq)); + } + } + } + if (need_send) { + int retries = 10; + int sent = false; + int res; + + tdp = (struct nc_test_data *)out_buf; + tdp->key1 = htonl(NC_TEST_DATA_KEY1); + tdp->key2 = htonl(NC_TEST_DATA_KEY2); + tdp->seq = htonl(seq); + td_len = ntohl(req->buflen) + sizeof(struct nc_test_data); + tdp->len = htonl(td_len); + while (!sent && (--retries >= 0)) { + res = sendto(s, tdp, td_len, 0, + (struct sockaddr *)&test_chan_master, sizeof(test_chan_master)); + if (res > 0) { + sent = true; + break; + } + if (errno == ENOBUFS) { + // Saturated the system + test_delay(1); // Time for 200 500 byte 10-baseT packets + } else { + // What else to do? + close(s); + return; + } + } + if (sent) { + nsent++; + } else { + perror("sendto"); + } + } + seq++; + } + results.key1 = htonl(NC_TEST_RESULT_KEY1); + results.key2 = htonl(NC_TEST_RESULT_KEY2); + results.seq = req->seq; + results.nsent = htonl(nsent); + results.nrecvd = htonl(nrecvd); + if (sendto(s, &results, sizeof(results), 0, + (struct sockaddr *)&test_chan_master, sizeof(test_chan_master)) < 0) { + perror("sendto results"); + } + close(s); +} + +// +// Read data from a stream, accounting for the fact that packet 'boundaries' +// are not preserved. This can also timeout (which would probably wreck the +// data boundaries). +// + +int +do_read(int fd, void *buf, int buflen) +{ + char *p = (char *)buf; + int len = buflen; + int res; + while (len) { + res = read(fd, p, len); + if (res < 0) { + perror("read"); + } else { + len -= res; + p += res; + if (res == 0) { + break; + } + } + } + return (buflen - len); +} + +// +// Generic TCP test +// + +static void +do_tcp_test(int s1, struct nc_request *req, struct sockaddr_in *master) +{ + int i, s, len, td_len, seq, seq_errors, lost, test_chan, res; + struct sockaddr_in test_chan_slave, test_chan_master; + struct nc_test_results results; + struct nc_test_data *tdp; + int nsent, nrecvd; + int need_recv, need_send; + int one = 1; + static int slave_tcp_port = -1; + + need_recv = true; need_send = true; + switch (ntohl(req->type)) { + case NC_REQUEST_TCP_SEND: + need_recv = false; + need_send = true; + break; + case NC_REQUEST_TCP_RECV: + need_recv = true; + need_send = false; + break; + case NC_REQUEST_TCP_ECHO: + break; + } + + if (slave_tcp_port < 0) { + s = socket(AF_INET, SOCK_STREAM, 0); + if (s < 0) { + pexit("datagram socket"); + } + + if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one))) { + perror("setsockopt SO_REUSEADDR"); + return; + } +#ifdef SO_REUSEPORT + if (setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one))) { + perror("setsockopt SO_REUSEPORT"); + return; + } +#endif + memset((char *) &test_chan_slave, 0, sizeof(test_chan_slave)); + test_chan_slave.sin_family = AF_INET; + test_chan_slave.sin_len = sizeof(test_chan_slave); + test_chan_slave.sin_addr.s_addr = htonl(INADDR_ANY); + test_chan_slave.sin_port = htons(ntohl(req->slave_port)); + + if (bind(s, (struct sockaddr *) &test_chan_slave, sizeof(test_chan_slave)) < 0) { + perror("bind"); + close(s); + } + listen(s, 128); + slave_tcp_port = s; + } + + s = slave_tcp_port; + len = sizeof(test_chan_master); + if ((test_chan = accept(s, (struct sockaddr *)&test_chan_master, &len)) < 0) { + pexit("accept"); + } + len = sizeof(test_chan_master); + getpeername(test_chan, (struct sockaddr *)&test_chan_master, &len); +// test_printf("connection from %s.%d\n", inet_ntoa(test_chan_master.sin_addr), + // ntohs(test_chan_master.sin_port)); + + nsent = 0; nrecvd = 0; seq = 0; seq_errors = 0; lost = 0; + for (i = 0; i < ntohl(req->nbufs); i++) { + if (need_recv) { + tdp = (struct nc_test_data *)in_buf; + td_len = ntohl(req->buflen) + sizeof(struct nc_test_data); + res = do_read(test_chan, tdp, td_len); + if (res != td_len) { + test_printf("recvfrom timeout, expecting seq #%d\n", seq); + if (++lost > MAX_ERRORS) { + test_printf("... giving up\n"); + break; + } + } else { + nrecvd++; + if ((ntohl(tdp->key1) == NC_TEST_DATA_KEY1) && + (ntohl(tdp->key2) == NC_TEST_DATA_KEY2)) { + if (ntohl(tdp->seq) != seq) { + test_printf("Packets out of sequence - recvd: %d, expected: %d\n", + ntohl(tdp->seq), seq); + seq = ntohl(tdp->seq); + seq_errors++; + } + } else { + test_printf("Bad data packet - key: %x/%x, seq: %d\n", + ntohl(tdp->key1), ntohl(tdp->key2), + ntohl(tdp->seq)); + } + } + } + if (need_send) { + tdp = (struct nc_test_data *)out_buf; + tdp->key1 = htonl(NC_TEST_DATA_KEY1); + tdp->key2 = htonl(NC_TEST_DATA_KEY2); + tdp->seq = htonl(seq); + td_len = ntohl(req->buflen) + sizeof(struct nc_test_data); + tdp->len = htonl(td_len); + if (write(test_chan, tdp, td_len) != td_len) { + perror("write"); + if (errno == ENOBUFS) { + // Saturated the system + test_delay(25); + } else { + // What else to do? + close(test_chan); + return; + } + } else { + nsent++; + } + } + seq++; + } + results.key1 = htonl(NC_TEST_RESULT_KEY1); + results.key2 = htonl(NC_TEST_RESULT_KEY2); + results.seq = req->seq; + results.nsent = htonl(nsent); + results.nrecvd = htonl(nrecvd); + if (write(test_chan, &results, sizeof(results)) != sizeof(results)) { + perror("write"); + } + close(test_chan); +} + +// +// Protocol driver for testing slave. +// +// This function is the main routine running here, handling requests sent from +// the master and providing various responses. +// +static void +nc_slave(test_param_t param) +{ + int s, masterlen; + struct sockaddr_in my_addr, master; + struct nc_request req; + struct nc_reply reply; + int done = false; + + test_printf("Start test for eth%d\n", param); + + s = socket(AF_INET, SOCK_DGRAM, 0); + if (s < 0) { + pexit("datagram socket"); + } + + memset((char *) &my_addr, 0, sizeof(my_addr)); + my_addr.sin_family = AF_INET; + my_addr.sin_len = sizeof(my_addr); + my_addr.sin_addr.s_addr = htonl(INADDR_ANY); + my_addr.sin_port = htons(NC_SLAVE_PORT); + + if (bind(s, (struct sockaddr *) &my_addr, sizeof(my_addr)) < 0) { + pexit("bind"); + } + + while (!done) { + masterlen = sizeof(master); + if (recvfrom(s, &req, sizeof(req), 0, (struct sockaddr *)&master, &masterlen) < 0) { + pexit("recvfrom"); + } +#if 0 + test_printf("Request %d from %s:%d\n", ntohl(req.type), + inet_ntoa(master.sin_addr), ntohs(master.sin_port)); +#endif + reply.response = htonl(NC_REPLY_ACK); + reply.seq = req.seq; + switch (ntohl(req.type)) { + case NC_REQUEST_DISCONNECT: + done = true; + break; + case NC_REQUEST_UDP_SEND: + test_printf("UDP send - %d buffers, %d bytes\n", ntohl(req.nbufs), ntohl(req.buflen)); + break; + case NC_REQUEST_UDP_RECV: + test_printf("UDP recv - %d buffers, %d bytes\n", ntohl(req.nbufs), ntohl(req.buflen)); + break; + case NC_REQUEST_UDP_ECHO: + test_printf("UDP echo - %d buffers, %d bytes\n", ntohl(req.nbufs), ntohl(req.buflen)); + break; + case NC_REQUEST_TCP_SEND: + test_printf("TCP send - %d buffers, %d bytes\n", ntohl(req.nbufs), ntohl(req.buflen)); + break; + case NC_REQUEST_TCP_RECV: + test_printf("TCP recv - %d buffers, %d bytes\n", ntohl(req.nbufs), ntohl(req.buflen)); + break; + case NC_REQUEST_TCP_ECHO: + test_printf("TCP echo - %d buffers, %d bytes\n", ntohl(req.nbufs), ntohl(req.buflen)); + break; + case NC_REQUEST_SET_LOAD: + start_load(ntohl(req.nbufs)); + break; + case NC_REQUEST_START_IDLE: + test_printf("Start IDLE thread\n"); + idle_thread_count = 0; + idle_thread_start_time = cyg_current_time(); + cyg_semaphore_post(&idle_thread_sem); + break; + case NC_REQUEST_STOP_IDLE: + cyg_semaphore_wait(&idle_thread_sem); + idle_thread_stop_time = cyg_current_time(); + test_printf("Stop IDLE thread\n"); + reply.misc.idle_results.elapsed_time = htonl(idle_thread_stop_time - idle_thread_start_time); + reply.misc.idle_results.count[0] = htonl(idle_thread_count >> 32); + reply.misc.idle_results.count[1] = htonl((long)idle_thread_count); + break; + default: + test_printf("Unrecognized request: %d\n", ntohl(req.type)); + reply.response = htonl(NC_REPLY_NAK); + reply.reason = htonl(NC_REPLY_NAK_UNKNOWN_REQUEST); + break; + } + if (sendto(s, &reply, sizeof(reply), 0, (struct sockaddr *)&master, masterlen) < 0) { + pexit("sendto"); + } + if (reply.response == ntohl(NC_REPLY_NAK)) { + continue; + } + switch (ntohl(req.type)) { + case NC_REQUEST_UDP_SEND: + case NC_REQUEST_UDP_RECV: + case NC_REQUEST_UDP_ECHO: + do_udp_test(s, &req, &master); + break; + case NC_REQUEST_TCP_SEND: + case NC_REQUEST_TCP_RECV: + case NC_REQUEST_TCP_ECHO: + do_tcp_test(s, &req, &master); + break; + case NC_REQUEST_START_IDLE: + case NC_REQUEST_STOP_IDLE: + case NC_REQUEST_SET_LOAD: + default: + break; + } + } + close(s); +} + +void +net_test(test_param_t param) +{ +// int i; + if (param == 0) { + test_printf("Start Network Characterization - SLAVE\n"); + calibrate_load(DESIRED_BACKGROUND_LOAD); + } + nc_slave(param); +#ifdef CYGDBG_NET_TIMING_STATS + show_net_times(); +#endif +#if LWIP_STATS_DISPLAY + stats_display(); +#endif + cyg_test_exit(); +} + + +// +// This function is called to calibrate the "background load" which can be +// applied during testing. It will be called before any commands from the +// host are managed. +// +static void +calibrate_load(int desired_load) +{ + long long no_load_idle, load_idle; + int percent_load; + int high, low; + + // Set limits + high = MAX_LOAD_THREAD_LEVEL; + low = MIN_LOAD_THREAD_LEVEL; + test_printf("Start Network Characterization - SLAVE\n"); + + // Compute the "no load" idle value + idle_thread_count = 0; + cyg_semaphore_post(&idle_thread_sem); // Start idle thread + test_printf("Start Network Characterization - SLAVE\n"); + cyg_thread_delay(1*100); // Pause for one second + test_printf("Start Network Characterization - SLAVE\n"); + cyg_semaphore_wait(&idle_thread_sem); // Stop idle thread + test_printf("Start Network Characterization - SLAVE\n"); + no_load_idle = idle_thread_count; + diag_printf("No load = %d\n", (int)idle_thread_count); + + // First ensure that the HIGH level is indeed higher + while (true) { + load_thread_level = high; + start_load(desired_load); // Start up a given load + idle_thread_count = 0; + cyg_semaphore_post(&idle_thread_sem); // Start idle thread + cyg_thread_delay(1*100); // Pause for one second + cyg_semaphore_wait(&idle_thread_sem); // Stop idle thread + load_idle = idle_thread_count; + start_load(0); // Shut down background load + percent_load = 100 - ((load_idle * 100) / no_load_idle); + diag_printf("High Load[%d] = %d => %d%%\n", load_thread_level, + (int)idle_thread_count, percent_load); + if ( percent_load > desired_load ) + break; // HIGH level is indeed higher + low = load_thread_level; // known to be lower + high *= 2; // else double it and try again + } + + // Now chop down to the level required + while (true) { + load_thread_level = (high + low) / 2; + start_load(desired_load); // Start up a given load + idle_thread_count = 0; + cyg_semaphore_post(&idle_thread_sem); // Start idle thread + cyg_thread_delay(1*100); // Pause for one second + cyg_semaphore_wait(&idle_thread_sem); // Stop idle thread + load_idle = idle_thread_count; + start_load(0); // Shut down background load + percent_load = 100 - ((load_idle * 100) / no_load_idle); + diag_printf("Load[%d] = %d => %d%%\n", load_thread_level, + (int)idle_thread_count, percent_load); + if (((high-low) <= 1) || (abs(desired_load-percent_load) <= 2)) break; + if (percent_load < desired_load) { + low = load_thread_level; + } else { + high = load_thread_level; + } + } + + // Now we are within a few percent of the target; scale the load + // factor to get a better fit, and test it, print the answer. + load_thread_level *= desired_load; + load_thread_level /= percent_load; + start_load(desired_load); // Start up a given load + idle_thread_count = 0; + cyg_semaphore_post(&idle_thread_sem); // Start idle thread + cyg_thread_delay(1*100); // Pause for one second + cyg_semaphore_wait(&idle_thread_sem); // Stop idle thread + load_idle = idle_thread_count; + start_load(0); // Shut down background load + percent_load = 100 - ((load_idle * 100) / no_load_idle); + diag_printf("Final load[%d] = %d => %d%%\n", load_thread_level, + (int)idle_thread_count, percent_load); +// no_load_idle_count_1_second = no_load_idle; +} + +// +// This function is called to set up a load level of 'load' percent (given +// as a whole number, e.g. start_load(20) would mean initiate a background +// load of 20%, leaving the cpu 80% idle). +// +static void +start_load(int load) +{ + static int prev_load = 0; + int i; + test_printf("Set background load = %d%%\n", load); + if (load == 0) { + if (prev_load == 0) return; // Nothing out there to stop + for (i = 0; i < prev_load/10; i++) { + cyg_semaphore_wait(&load_thread_sem[i]); + } + prev_load = 0; + } else { + for (i = 0; i < load/10; i++) { + cyg_semaphore_post(&load_thread_sem[i]); + } + prev_load = load; + } +} + +// +// These thread(s) do some amount of "background" computing. This is used +// to simulate a given load level. They need to be run at a higher priority +// than the network code itself. +// +// Like the "idle" thread, they run as long as their "switch" (aka semaphore) +// is enabled. +// +void +net_load(cyg_addrword_t who) +{ + int i; + while (true) { + cyg_semaphore_wait(&load_thread_sem[who]); + for (i = 0; i < load_thread_level; i++) { + do_some_random_computation(i); + } + cyg_thread_delay(1); // Wait until the next 'tick' + cyg_semaphore_post(&load_thread_sem[who]); + } +} + +// +// Some arbitrary computation, designed to use up the CPU and cause associated +// cache "thrash" behaviour - part of background load modelling. +// +static void +do_some_random_computation(int p) +{ + // Just something that might be "hard" + volatile double x; + x = ((p * 10) * 3.14159) / 180.0; // radians +} + +// +// This thread does nothing but count. It will be allowed to count +// as long as the semaphore is "free". +// +void +net_idle(cyg_addrword_t param) +{ + while (true) { + cyg_semaphore_wait(&idle_thread_sem); + idle_thread_count++; + cyg_semaphore_post(&idle_thread_sem); + } +} +#if 0 +void +cyg_start(void *n) +{ + int i; + // Create processing threads + for (i = 0; i < CYGHWR_NET_DRIVERS; i++) { + cyg_thread_create(MAIN_THREAD_PRIORITY, // Priority + net_test, // entry + i, // entry parameter + "Network test", // Name + &main_thread_stack[i][0], // Stack + STACK_SIZE, // Size + &main_thread_handle[i], // Handle + &main_thread_data[i] // Thread data structure + ); + } + cyg_thread_resume(main_thread_handle[0]); // Start first one + // Create the idle thread environment + cyg_semaphore_init(&idle_thread_sem, 0); + cyg_thread_create(IDLE_THREAD_PRIORITY, // Priority + net_idle, // entry + 0, // entry parameter + "Network idle", // Name + &idle_thread_stack[0], // Stack + STACK_SIZE, // Size + &idle_thread_handle, // Handle + &idle_thread_data // Thread data structure + ); + cyg_thread_resume(idle_thread_handle); // Start it + // Create the load threads and their environment(s) + for (i = 0; i < NUM_LOAD_THREADS; i++) { + cyg_semaphore_init(&load_thread_sem[i], 0); + cyg_thread_create(LOAD_THREAD_PRIORITY, // Priority + net_load, // entry + i, // entry parameter + "Background load", // Name + &load_thread_stack[i][0], // Stack + STACK_SIZE, // Size + &load_thread_handle[i], // Handle + &load_thread_data[i] // Thread data structure + ); + cyg_thread_resume(load_thread_handle[i]); // Start it + } + cyg_scheduler_start(); +} + +#endif + +void +tmain(cyg_addrword_t p) +{ + lwip_init(); + sys_thread_new(net_test, 0, MAIN_THREAD_PRIORITY); +} + +static char stack[STACK_SIZE]; +static cyg_thread thread_data; +static cyg_handle_t thread_handle; + +void +cyg_user_start(void) +{ + int i; + // Create the idle thread environment + cyg_semaphore_init(&idle_thread_sem, 0); + cyg_thread_create(IDLE_THREAD_PRIORITY, // Priority + net_idle, // entry + 0, // entry parameter + "Network idle", // Name + &idle_thread_stack[0], // Stack + STACK_SIZE, // Size + &idle_thread_handle, // Handle + &idle_thread_data // Thread data structure + ); + cyg_thread_resume(idle_thread_handle); // Start it + // Create the load threads and their environment(s) + for (i = 0; i < NUM_LOAD_THREADS; i++) { + cyg_semaphore_init(&load_thread_sem[i], 0); + cyg_thread_create(LOAD_THREAD_PRIORITY, // Priority + net_load, // entry + i, // entry parameter + "Background load", // Name + &load_thread_stack[i][0], // Stack + STACK_SIZE, // Size + &load_thread_handle[i], // Handle + &load_thread_data[i] // Thread data structure + ); + cyg_thread_resume(load_thread_handle[i]); // Start it + } + // Create a main thread, so we can run the scheduler and have time 'pass' + cyg_thread_create(10, // Priority - just a number + tmain, // entry + 0, // entry parameter + "socket echo test", // Name + &stack[0], // Stack + STACK_SIZE, // Size + &thread_handle, // Handle + &thread_data // Thread data structure + ); + cyg_thread_resume(thread_handle); // Start it +}
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/tests/socket.c @@ -0,0 +1,90 @@ +//========================================================================== +//####ECOSGPLCOPYRIGHTBEGIN#### +// ------------------------------------------- +// This file is part of eCos, the Embedded Configurable Operating System. +// Copyright (C) 2004 eCosCentric +// +// eCos is free software; you can redistribute it and/or modify it under +// the terms of the GNU General Public License as published by the Free +// Software Foundation; either version 2 or (at your option) any later version. +// +// eCos is distributed in the hope that it will be useful, but WITHOUT ANY +// WARRANTY; without even the implied warranty of MERCHANTABILITY or +// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +// for more details. +// +// You should have received a copy of the GNU General Public License along +// with eCos; if not, write to the Free Software Foundation, Inc., +// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. +// +// As a special exception, if other files instantiate templates or use macros +// or inline functions from this file, or you compile this file and link it +// with other works to produce a work based on this file, this file does not +// by itself cause the resulting work to be covered by the GNU General Public +// License. However the source code for this file must still be made available +// in accordance with section (3) of the GNU General Public License. +// +// This exception does not invalidate any other reasons why a work based on +// this file might be covered by the GNU General Public License. +// ------------------------------------------- +//####ECOSGPLCOPYRIGHTEND#### +//========================================================================== + +/* Simple test-case for the BSD socket API : echo on TCP port 7 */ + +#include "lwip/sys.h" +#define LWIP_COMPAT_SOCKETS 1 +#include "lwip/sockets.h" + +char buf[400]; +static void +socket_thread(void *arg) +{ + int sock,s; + int len; + struct sockaddr_in addr,rem; + sock = socket(AF_INET,SOCK_STREAM,0); + addr.sin_family = AF_INET; + addr.sin_port = htons(7); + addr.sin_addr.s_addr = INADDR_ANY; + + bind(sock,(struct sockaddr *)&addr,sizeof(addr)); + + listen(sock,5); + while(1) { + len = sizeof(rem); + s = accept(sock,(struct sockaddr*)&rem,&len); + while((len = read(s,buf,400)) > 0) + write(s,buf,len); + close(s); + } +} + +void +tmain(cyg_addrword_t p) +{ + lwip_init(); + sys_thread_new(socket_thread, (void*)"socket",7); +} + +#define STACK_SIZE 0x1000 +static char stack[STACK_SIZE]; +static cyg_thread thread_data; +static cyg_handle_t thread_handle; + +void +cyg_user_start(void) +{ + // Create a main thread, so we can run the scheduler and have time 'pass' + cyg_thread_create(10, // Priority - just a number + tmain, // entry + 0, // entry parameter + "socket echo test", // Name + &stack[0], // Stack + STACK_SIZE, // Size + &thread_handle, // Handle + &thread_data // Thread data structure + ); + cyg_thread_resume(thread_handle); // Start it +} +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/tests/sys_timeout.c @@ -0,0 +1,95 @@ +//========================================================================== +//####ECOSGPLCOPYRIGHTBEGIN#### +// ------------------------------------------- +// This file is part of eCos, the Embedded Configurable Operating System. +// Copyright (C) 2004 eCosCentric +// +// eCos is free software; you can redistribute it and/or modify it under +// the terms of the GNU General Public License as published by the Free +// Software Foundation; either version 2 or (at your option) any later version. +// +// eCos is distributed in the hope that it will be useful, but WITHOUT ANY +// WARRANTY; without even the implied warranty of MERCHANTABILITY or +// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +// for more details. +// +// You should have received a copy of the GNU General Public License along +// with eCos; if not, write to the Free Software Foundation, Inc., +// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. +// +// As a special exception, if other files instantiate templates or use macros +// or inline functions from this file, or you compile this file and link it +// with other works to produce a work based on this file, this file does not +// by itself cause the resulting work to be covered by the GNU General Public +// License. However the source code for this file must still be made available +// in accordance with section (3) of the GNU General Public License. +// +// This exception does not invalidate any other reasons why a work based on +// this file might be covered by the GNU General Public License. +// ------------------------------------------- +//####ECOSGPLCOPYRIGHTEND#### +//========================================================================== + +/* Simple test-case for the lwip system timeout functionality */ + +#include "lwip/sys.h" + +#define TIMERS 100 +sys_timeout_handler timers[TIMERS]; +int intervals[TIMERS]; + +static void +timeout_fn ( void * arg) +{ + int i, j = (int)arg; +// diag_printf("Timeout #%d called\n", (int)arg); + for (i = 0; i < j; i++) + diag_printf(" "); + diag_printf("%d\n", j); +// sys_timeout( intervals[j], timers[j], arg); + sys_timeout( 1000, timers[j], arg); +} + +static void +timeout_thread(void *arg) +{ + int i; + + for (i = 0; i < TIMERS; i++) { + diag_printf("Adding timer #%d\n", i); + timers[i] = timeout_fn; + intervals[i] = (i+1)*1000; + sys_timeout(intervals[i], timers[i], (void *)i); + } + sys_msleep(0); + diag_printf("Done\n"); +} + +void +tmain(cyg_addrword_t p) +{ + lwip_init(); + sys_thread_new(timeout_thread, (void*)"timeout",7); +} + +#define STACK_SIZE 0x1000 +static char stack[STACK_SIZE]; +static cyg_thread thread_data; +static cyg_handle_t thread_handle; + +void +cyg_user_start(void) +{ + // Create a main thread, so we can run the scheduler and have time 'pass' + cyg_thread_create(10, // Priority - just a number + tmain, // entry + 0, // entry parameter + "timeout test", // Name + &stack[0], // Stack + STACK_SIZE, // Size + &thread_handle, // Handle + &thread_data // Thread data structure + ); + cyg_thread_resume(thread_handle); // Start it +} +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/tests/tcpecho.c @@ -0,0 +1,105 @@ +/* + * Copyright (c) 2001, Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + +#include "lwip/sys.h" +#include "lwip/api.h" + +static void +tcpecho_thread(void *arg) +{ + struct netconn *conn, *newconn; + err_t err; + + /* Create a new connection identifier. */ + conn = netconn_new(NETCONN_TCP); + + /* Bind connection to well known port number 7. */ + netconn_bind(conn, NULL, 7); + + /* Tell connection to go into listening mode. */ + netconn_listen(conn); + + while(1) { + + /* Grab new connection. */ + newconn = netconn_accept(conn); + /* Process the new connection. */ + if(newconn != NULL) { + struct netbuf *buf; + void *data; + u16_t len; + + while((buf = netconn_recv(newconn)) != NULL) { + do { + netbuf_data(buf, &data, &len); + err = netconn_write(newconn, data, len, NETCONN_COPY); + if(err != ERR_OK) { + } + } while(netbuf_next(buf) >= 0); + netbuf_delete(buf); + } + /* Close connection and discard connection identifier. */ + netconn_delete(newconn); + } + } +} + +void +tmain(cyg_addrword_t p) +{ + lwip_init(); + sys_thread_new(tcpecho_thread, (void*)"tcpecho",7); +} + +#define STACK_SIZE 0x1000 +static char stack[STACK_SIZE]; +static cyg_thread thread_data; +static cyg_handle_t thread_handle; + +void +cyg_user_start(void) +{ + // Create a main thread, so we can run the scheduler and have time 'pass' + cyg_thread_create(10, // Priority - just a number + tmain, // entry + 0, // entry parameter + "TCP echo test", // Name + &stack[0], // Stack + STACK_SIZE, // Size + &thread_handle, // Handle + &thread_data // Thread data structure + ); + cyg_thread_resume(thread_handle); // Start it +} +
new file mode 100644 --- /dev/null +++ b/packages/net/lwip_tcpip/current/tests/udpecho.c @@ -0,0 +1,88 @@ +/* + * Copyright (c) 2001, Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels <adam@sics.se> + * + */ + +#include "lwip/api.h" +#include "lwip/sys.h" + +/*-----------------------------------------------------------------------------------*/ +char buffer[100]; +void +udpecho_thread(void *arg) +{ + struct netconn *conn; + struct netbuf *buf; + struct ip_addr *addr; + unsigned short port; + + conn = netconn_new(NETCONN_UDP); + netconn_bind(conn, NULL, 7); + + while(1) { + buf = netconn_recv(conn); + addr = netbuf_fromaddr(buf); + port = netbuf_fromport(buf); + netconn_connect(conn, addr, port); + netconn_send(conn, buf); + netbuf_copy(buf, buffer, sizeof(buffer)); + netbuf_delete(buf); + } +} +/*-----------------------------------------------------------------------------------*/ +void tmain(cyg_addrword_t p) +{ + lwip_init(); + sys_thread_new(udpecho_thread, (void*)"udpecho",7); +} + +#define STACK_SIZE 0x1000 +static char stack[STACK_SIZE]; +static cyg_thread thread_data; +static cyg_handle_t thread_handle; + +void +cyg_user_start(void) +{ + // Create a main thread, so we can run the scheduler and have time 'pass' + cyg_thread_create(10, // Priority - just a number + tmain, // entry + 0, // entry parameter + "UDP echo test", // Name + &stack[0], // Stack + STACK_SIZE, // Size + &thread_handle, // Handle + &thread_data // Thread data structure + ); + cyg_thread_resume(thread_handle); // Start it +} +