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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>
27#include "bootp.h"
28#include "rarp.h"
29#include "tftp.h"
30
31#if (CONFIG_COMMANDS & CFG_CMD_NET)
32
33#define TIMEOUT 5 /* Seconds before trying BOOTP again */
34#ifndef CONFIG_NET_RETRY_COUNT
35# define TIMEOUT_COUNT 5 /* # of timeouts before giving up */
36#else
37# define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT)
38#endif
39
40
41int RarpTry;
42
43/*
44 * Handle a RARP received packet.
45 */
46static void
47RarpHandler(uchar * dummi0, unsigned dummi1, unsigned dummi2, unsigned dummi3)
48{
49#ifdef DEBUG
50 printf("Got good RARP\n");
51#endif
52 TftpStart ();
53}
54
55
56/*
57 * Timeout on BOOTP request.
58 */
59static void
60RarpTimeout(void)
61{
62 if (RarpTry >= TIMEOUT_COUNT) {
63 puts ("\nRetry count exceeded; starting again\n");
64 NetStartAgain ();
65 } else {
66 NetSetTimeout (TIMEOUT * CFG_HZ, RarpTimeout);
67 RarpRequest ();
68 }
69}
70
71
72void
73RarpRequest (void)
74{
75 int i;
76 volatile uchar *pkt;
77 ARP_t * rarp;
78
79 printf("RARP broadcast %d\n", ++RarpTry);
80 pkt = NetTxPacket;
81
82 NetSetEther(pkt, NetBcastAddr, PROT_RARP);
83 pkt += ETHER_HDR_SIZE;
84
85 rarp = (ARP_t *)pkt;
86
87 rarp->ar_hrd = ARP_ETHER;
88 rarp->ar_pro = PROT_IP;
89 rarp->ar_hln = 6;
90 rarp->ar_pln = 4;
91 rarp->ar_op = RARPOP_REQUEST;
92 memcpy (&rarp->ar_data[0], NetOurEther, 6); /* source ET addr */
93 memcpy (&rarp->ar_data[6], &NetOurIP, 4); /* source IP addr */
94 memcpy (&rarp->ar_data[10], NetOurEther, 6); /* dest ET addr = source ET addr ??*/
95 /* dest. IP addr set to broadcast */
96 for (i = 0; i <= 3; i++) {
97 rarp->ar_data[16 + i] = 0xff;
98 }
99
100 NetSendPacket(NetTxPacket, ETHER_HDR_SIZE + ARP_HDR_SIZE);
101
102 NetSetTimeout(TIMEOUT * CFG_HZ, RarpTimeout);
103 NetSetHandler(RarpHandler);
104}
105
106#endif /* CFG_CMD_NET */