ecos: packages/redboot/current/src/net/ip.c annotate

annotate packages/redboot/current/src/net/ip.c @ 2729:74dbf4c3f2e1 after-copyright-change-20090129

Update all copyright banners to reflect FSF ownership; fix and improve licence text.

author	jlarmour
date	Thu, 29 Jan 2009 17:47:46 +0000
parents	21264951b120
children

rev	line source
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	1 //==========================================================================
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	2 //
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	3 // net/ip.c
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	4 //
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	5 // Stand-alone IP networking support for RedBoot
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	6 //
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	7 //==========================================================================
2729 74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	8 // ####ECOSGPLCOPYRIGHTBEGIN####
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	9 // -------------------------------------------
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	10 // This file is part of eCos, the Embedded Configurable Operating System.
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 165 diff changeset	12 //
2729 74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	13 // eCos is free software; you can redistribute it and/or modify it under
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	14 // the terms of the GNU General Public License as published by the Free
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	15 // Software Foundation; either version 2 or (at your option) any later
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	16 // version.
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 165 diff changeset	17 //
2729 74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	18 // eCos is distributed in the hope that it will be useful, but WITHOUT
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	19 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	21 // for more details.
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 165 diff changeset	22 //
2729 74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	23 // You should have received a copy of the GNU General Public License
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	24 // along with eCos; if not, write to the Free Software Foundation, Inc.,
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	25 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 165 diff changeset	26 //
2729 74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	27 // As a special exception, if other files instantiate templates or use
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	28 // macros or inline functions from this file, or you compile this file
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	29 // and link it with other works to produce a work based on this file,
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	30 // this file does not by itself cause the resulting work to be covered by
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	31 // the GNU General Public License. However the source code for this file
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	32 // must still be made available in accordance with section (3) of the GNU
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	33 // General Public License v2.
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 165 diff changeset	34 //
2729 74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	35 // This exception does not invalidate any other reasons why a work based
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	36 // on this file might be covered by the GNU General Public License.
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	37 // -------------------------------------------
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 255 diff changeset	38 // ####ECOSGPLCOPYRIGHTEND####
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	39 //==========================================================================
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	40 //#####DESCRIPTIONBEGIN####
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	41 //
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	42 // Author(s): gthomas
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	43 // Contributors: gthomas
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	44 // Date: 2000-07-14
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	45 // Purpose:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	46 // Description:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	47 //
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	48 // This code is part of RedBoot (tm).
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	49 //
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	50 //####DESCRIPTIONEND####
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	51 //
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	52 //==========================================================================
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	53
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	54 #include <net/net.h>
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	55
165 d63db767121d Merge from eCos master repository on 2001-06-29-06:43:03-BST jlarmour parents: 115 diff changeset	56 #ifndef CYGDAT_REDBOOT_DEFAULT_IP_ADDR
d63db767121d Merge from eCos master repository on 2001-06-29-06:43:03-BST jlarmour parents: 115 diff changeset	57 # define CYGDAT_REDBOOT_DEFAULT_IP_ADDR 0, 0, 0, 0
d63db767121d Merge from eCos master repository on 2001-06-29-06:43:03-BST jlarmour parents: 115 diff changeset	58 #endif
231 4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	59 #ifndef CYGDAT_REDBOOT_DEFAULT_IP_ADDR_MASK
4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	60 # define CYGDAT_REDBOOT_DEFAULT_IP_ADDR_MASK 255, 255, 255, 0
4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	61 #endif
4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	62 #ifndef CYGDAT_REDBOOT_DEFAULT_GATEWAY_IP_ADDR
4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	63 # define CYGDAT_REDBOOT_DEFAULT_GATEWAY_IP_ADDR 0, 0, 0, 0
4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	64 #endif
165 d63db767121d Merge from eCos master repository on 2001-06-29-06:43:03-BST jlarmour parents: 115 diff changeset	65
d63db767121d Merge from eCos master repository on 2001-06-29-06:43:03-BST jlarmour parents: 115 diff changeset	66 ip_addr_t __local_ip_addr = { CYGDAT_REDBOOT_DEFAULT_IP_ADDR };
231 4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	67 #ifdef CYGSEM_REDBOOT_NETWORKING_USE_GATEWAY
4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	68 ip_addr_t __local_ip_mask = { CYGDAT_REDBOOT_DEFAULT_IP_ADDR_MASK };
4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	69 ip_addr_t __local_ip_gate = { CYGDAT_REDBOOT_DEFAULT_GATEWAY_IP_ADDR };
4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	70 #endif
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	71
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	72 static word ip_ident;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	73
231 4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	74 #ifdef CYGSEM_REDBOOT_NETWORKING_USE_GATEWAY
4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	75 /*
4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	76 * See if an address is on the local network
4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	77 */
4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	78 int
4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	79 __ip_addr_local(ip_addr_t *addr)
4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	80 {
4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	81 return !(
4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	82 ((__local_ip_addr[0] ^ (*addr)[0]) & __local_ip_mask[0]) \|
4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	83 ((__local_ip_addr[1] ^ (*addr)[1]) & __local_ip_mask[1]) \|
4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	84 ((__local_ip_addr[2] ^ (*addr)[2]) & __local_ip_mask[2]) \|
4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	85 ((__local_ip_addr[3] ^ (*addr)[3]) & __local_ip_mask[3]));
4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	86 }
4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	87 #endif
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	88
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	89 /*
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	90 * Match given IP address to our address.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	91 * Check for broadcast matches as well.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	92 */
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	93 static int
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	94 ip_addr_match(ip_addr_t addr)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	95 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	96 if (addr[0] == 255 && addr[1] == 255 && addr[2] == 255 && addr[3] == 255)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	97 return 1;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	98
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	99 if (!memcmp(addr, __local_ip_addr, sizeof(ip_addr_t)))
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	100 return 1;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	101
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	102 /*
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	103 * Consider it an address match if we haven't gotten our IP address yet.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	104 * Some DHCP servers will address IP packets to the assigned address
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	105 * instead of a IP broadcast address.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	106 */
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	107 if (__local_ip_addr[0] == 0 && __local_ip_addr[1] == 0 &&
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	108 __local_ip_addr[2] == 0 && __local_ip_addr[3] == 0)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	109 return 1;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	110
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	111 return 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	112 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	113
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	114
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	115 extern void __tcp_handler(pktbuf_t , ip_route_t );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	116
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	117 /*
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	118 * Handle IP packets coming from the polled ethernet interface.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	119 */
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	120 void
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	121 __ip_handler(pktbuf_t pkt, enet_addr_t src_enet_addr)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	122 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	123 ip_header_t *ip = pkt->ip_hdr;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	124 ip_route_t r;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	125 int hdr_bytes;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	126
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	127 /* first make sure its ours and has a good checksum. */
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	128 if (!ip_addr_match(ip->destination) \|\|
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	129 __sum((word *)ip, ip->hdr_len << 2, 0) != 0) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	130 __pktbuf_free(pkt);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	131 return;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	132 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	133
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	134 memcpy(r.ip_addr, ip->source, sizeof(ip_addr_t));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	135 memcpy(r.enet_addr, src_enet_addr, sizeof(enet_addr_t));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	136
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	137 hdr_bytes = ip->hdr_len << 2;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	138 pkt->pkt_bytes = ntohs(ip->length) - hdr_bytes;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	139
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	140 switch (ip->protocol) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	141
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	142 #if NET_SUPPORT_ICMP
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	143 case IP_PROTO_ICMP:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	144 pkt->icmp_hdr = (icmp_header_t )(((char )ip) + hdr_bytes);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	145 __icmp_handler(pkt, &r);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	146 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	147 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	148
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	149 #if NET_SUPPORT_TCP
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	150 case IP_PROTO_TCP:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	151 pkt->tcp_hdr = (tcp_header_t )(((char )ip) + hdr_bytes);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	152 __tcp_handler(pkt, &r);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	153 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	154 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	155
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	156 #if NET_SUPPORT_UDP
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	157 case IP_PROTO_UDP:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	158 pkt->udp_hdr = (udp_header_t )(((char )ip) + hdr_bytes);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	159 __udp_handler(pkt, &r);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	160 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	161 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	162
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	163 default:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	164 __pktbuf_free(pkt);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	165 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	166 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	167 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	168
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	169
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	170 /*
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	171 * Send an IP packet.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	172 *
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	173 * The IP data field should contain pkt->pkt_bytes of data.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	174 * pkt->[udp\|tcp\|icmp]_hdr points to the IP data field. Any
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	175 * IP options are assumed to be already in place in the IP
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	176 * options field.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	177 */
231 4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	178 int
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	179 __ip_send(pktbuf_t pkt, int protocol, ip_route_t dest)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	180 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	181 ip_header_t *ip = pkt->ip_hdr;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	182 int hdr_bytes;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	183 unsigned short cksum;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	184
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	185 /*
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	186 * Figure out header length. The use udp_hdr is
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	187 * somewhat arbitrary, but works because it is
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	188 * a union with other IP protocol headers.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	189 */
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	190 hdr_bytes = (((char )pkt->udp_hdr) - ((char )ip));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	191
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	192 pkt->pkt_bytes += hdr_bytes;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	193
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	194 ip->version = 4;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	195 ip->hdr_len = hdr_bytes >> 2;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	196 ip->tos = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	197 ip->length = htons(pkt->pkt_bytes);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	198 ip->ident = htons(ip_ident);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	199 ip_ident++;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	200 ip->fragment = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	201 ip->ttl = 255;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	202 ip->ttl = 64;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	203 ip->protocol = protocol;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	204 ip->checksum = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	205 memcpy(ip->source, __local_ip_addr, sizeof(ip_addr_t));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	206 memcpy(ip->destination, dest->ip_addr, sizeof(ip_addr_t));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	207 cksum = __sum((word *)ip, hdr_bytes, 0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	208 ip->checksum = htons(cksum);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	209
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	210 __enet_send(pkt, &dest->enet_addr, ETH_TYPE_IP);
231 4ebdd3788c30 Merge gateway support from Grant Edwards gthomas parents: 210 diff changeset	211 return 0;
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	212 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	213
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: diff changeset	214

Mercurial > ecos

annotate packages/redboot/current/src/net/ip.c @ 2729:74dbf4c3f2e1 after-copyright-change-20090129