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wdenkaffae2b2002-08-17 09:36:01 +00001/*
2 * (C) Copyright 2000-2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24#include <common.h>
25#include <command.h>
26#include <net.h>
wdenkc40b2952004-03-13 23:29:43 +000027#include "nfs.h"
wdenkaffae2b2002-08-17 09:36:01 +000028#include "bootp.h"
29#include "rarp.h"
30#include "tftp.h"
31
32#if (CONFIG_COMMANDS & CFG_CMD_NET)
33
34#define TIMEOUT 5 /* Seconds before trying BOOTP again */
35#ifndef CONFIG_NET_RETRY_COUNT
36# define TIMEOUT_COUNT 5 /* # of timeouts before giving up */
37#else
38# define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT)
39#endif
40
41
42int RarpTry;
43
44/*
45 * Handle a RARP received packet.
46 */
47static void
48RarpHandler(uchar * dummi0, unsigned dummi1, unsigned dummi2, unsigned dummi3)
49{
wdenkc40b2952004-03-13 23:29:43 +000050 char *s;
wdenkaffae2b2002-08-17 09:36:01 +000051#ifdef DEBUG
wdenk4b9206e2004-03-23 22:14:11 +000052 puts ("Got good RARP\n");
wdenkaffae2b2002-08-17 09:36:01 +000053#endif
wdenk0e6d7982004-03-14 00:07:33 +000054 if ((s = getenv("autoload")) != NULL) {
55 if (*s == 'n') {
56 /*
57 * Just use RARP to configure system;
58 * Do not use TFTP/NFS to to load the bootfile.
59 */
60 NetState = NETLOOP_SUCCESS;
61 return;
62#if (CONFIG_COMMANDS & CFG_CMD_NFS)
63 } else if ((s != NULL) && !strcmp(s, "NFS")) {
64 NfsStart();
65 return;
66#endif
67 }
wdenkc40b2952004-03-13 23:29:43 +000068 }
wdenkaffae2b2002-08-17 09:36:01 +000069 TftpStart ();
70}
71
72
73/*
74 * Timeout on BOOTP request.
75 */
76static void
77RarpTimeout(void)
78{
79 if (RarpTry >= TIMEOUT_COUNT) {
80 puts ("\nRetry count exceeded; starting again\n");
81 NetStartAgain ();
82 } else {
83 NetSetTimeout (TIMEOUT * CFG_HZ, RarpTimeout);
84 RarpRequest ();
85 }
86}
87
88
89void
90RarpRequest (void)
91{
92 int i;
93 volatile uchar *pkt;
94 ARP_t * rarp;
95
96 printf("RARP broadcast %d\n", ++RarpTry);
97 pkt = NetTxPacket;
98
wdenka3d991b2004-04-15 21:48:45 +000099 pkt += NetSetEther(pkt, NetBcastAddr, PROT_RARP);
wdenkaffae2b2002-08-17 09:36:01 +0000100
101 rarp = (ARP_t *)pkt;
102
wdenk7a8e9bed2003-05-31 18:35:21 +0000103 rarp->ar_hrd = htons (ARP_ETHER);
104 rarp->ar_pro = htons (PROT_IP);
wdenkaffae2b2002-08-17 09:36:01 +0000105 rarp->ar_hln = 6;
106 rarp->ar_pln = 4;
wdenk7a8e9bed2003-05-31 18:35:21 +0000107 rarp->ar_op = htons (RARPOP_REQUEST);
wdenkaffae2b2002-08-17 09:36:01 +0000108 memcpy (&rarp->ar_data[0], NetOurEther, 6); /* source ET addr */
109 memcpy (&rarp->ar_data[6], &NetOurIP, 4); /* source IP addr */
110 memcpy (&rarp->ar_data[10], NetOurEther, 6); /* dest ET addr = source ET addr ??*/
111 /* dest. IP addr set to broadcast */
112 for (i = 0; i <= 3; i++) {
113 rarp->ar_data[16 + i] = 0xff;
114 }
115
wdenka3d991b2004-04-15 21:48:45 +0000116 NetSendPacket(NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
wdenkaffae2b2002-08-17 09:36:01 +0000117
118 NetSetTimeout(TIMEOUT * CFG_HZ, RarpTimeout);
119 NetSetHandler(RarpHandler);
120}
121
122#endif /* CFG_CMD_NET */