Mercurial > flash_v2
diff packages/redboot/current/src/net/bootp.c @ 115:6ed91473a1cd ecos-sw-2000-08-21
Merge from eCos master repository on 2000-08-21-22:40:54-BST
| author | jlarmour |
|---|---|
| date | Fri, 25 Aug 2000 17:32:38 +0000 |
| parents | |
| children | 25e238959bae |
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new file mode 100644 --- /dev/null +++ b/packages/redboot/current/src/net/bootp.c @@ -0,0 +1,143 @@ +//========================================================================== +// +// net/bootp.c +// +// Stand-alone minimal BOOTP support for RedBoot +// +//========================================================================== +//####COPYRIGHTBEGIN#### +// +// ------------------------------------------- +// The contents of this file are subject to the Red Hat eCos Public License +// Version 1.1 (the "License"); you may not use this file except in +// compliance with the License. You may obtain a copy of the License at +// http://www.redhat.com/ +// +// Software distributed under the License is distributed on an "AS IS" +// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the +// License for the specific language governing rights and limitations under +// the License. +// +// The Original Code is eCos - Embedded Configurable Operating System, +// released September 30, 1998. +// +// The Initial Developer of the Original Code is Red Hat. +// Portions created by Red Hat are +// Copyright (C) 1998, 1999, 2000 Red Hat, Inc. +// All Rights Reserved. +// ------------------------------------------- +// +//####COPYRIGHTEND#### +//========================================================================== +//#####DESCRIPTIONBEGIN#### +// +// Author(s): gthomas +// Contributors: gthomas +// Date: 2000-07-14 +// Purpose: +// Description: +// +// This code is part of RedBoot (tm). +// +//####DESCRIPTIONEND#### +// +//========================================================================== + +#include <net/net.h> +#include <net/bootp.h> + +extern int net_debug; + +#define SHOULD_BE_RANDOM 0x12345555 + +/* How many milliseconds to wait before retrying the request */ +#define RETRY_TIME 2000 + +static bootp_header_t *bp_info; + +static void +bootp_handler(udp_socket_t *skt, char *buf, int len, + ip_route_t *src_route, word src_port) +{ + bootp_header_t *b; + + b = (bootp_header_t *)buf; + if (bp_info) { + memcpy(bp_info, b, len); + } + + if (b->bp_op == BOOTREPLY && + !memcmp(b->bp_chaddr, __local_enet_addr, 6)) { + memcpy(__local_ip_addr, &b->bp_yiaddr, 4); + } +} + + +/* + * Find our IP address and copy to __local_ip_addr. + * Return zero if successful, -1 if not. + */ +int +__bootp_find_local_ip(bootp_header_t *info) +{ + udp_socket_t udp_skt; + bootp_header_t b; + ip_route_t r; + int retry; + unsigned long start; + + bp_info = info; + + memset(&b, 0, sizeof(b)); + + b.bp_op = BOOTREQUEST; + b.bp_htype = HTYPE_ETHERNET; + b.bp_hlen = 6; + b.bp_xid = SHOULD_BE_RANDOM; + + __local_ip_addr[0] = 0; + __local_ip_addr[1] = 0; + __local_ip_addr[2] = 0; + __local_ip_addr[3] = 0; + + memcpy(b.bp_chaddr, __local_enet_addr, 6); + + /* fill out route for a broadcast */ + r.ip_addr[0] = 255; + r.ip_addr[1] = 255; + r.ip_addr[2] = 255; + r.ip_addr[3] = 255; + r.enet_addr[0] = 255; + r.enet_addr[1] = 255; + r.enet_addr[2] = 255; + r.enet_addr[3] = 255; + r.enet_addr[4] = 255; + r.enet_addr[5] = 255; + + /* setup a socket listener for bootp replies */ + __udp_install_listener(&udp_skt, IPPORT_BOOTPC, bootp_handler); + + retry = 3; + while (retry-- > 0) { + start = MS_TICKS(); + + __udp_send((char *)&b, sizeof(b), &r, IPPORT_BOOTPS, IPPORT_BOOTPC); + + do { + __enet_poll(); + if (__local_ip_addr[0] || __local_ip_addr[1] || + __local_ip_addr[2] || __local_ip_addr[3]) { + /* success */ + __udp_remove_listener(IPPORT_BOOTPC); + return 0; + } + } while ((MS_TICKS() - start) < RETRY_TIME); + } + + /* timed out */ + __udp_remove_listener(IPPORT_BOOTPC); + net_debug = 0; + return -1; +} + +
