2 * (C) Copyright 2000-2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
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.
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.
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,
32 #if defined(CONFIG_CMD_NET)
34 DECLARE_GLOBAL_DATA_PTR;
36 #define TIMEOUT 5 /* Seconds before trying BOOTP again */
38 #if !defined(CONFIG_NET_RETRY_COUNT)
39 /* # of timeouts before giving up */
40 #define TIMEOUT_COUNT 5
42 #define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT)
47 /* Handle a RARP received packet */
48 static void RarpHandler(uchar *dummi0,
56 puts ("Got good RARP\n");
59 if ((s = getenv("autoload")) != NULL) {
62 * Just use RARP to configure system;
63 * Do not use TFTP/NFS to to load the bootfile.
65 NetState = NETLOOP_SUCCESS;
67 #if defined(CONFIG_CMD_NFS)
68 } else if ((s != NULL) && !strcmp(s, "NFS")) {
78 /* Timeout on BOOTP request */
79 static void RarpTimeout(void)
83 if (RarpTry >= TIMEOUT_COUNT) {
84 puts("\nRetry count exceeded; starting again\n");
87 NetSetTimeout(TIMEOUT * CFG_HZ, RarpTimeout);
92 void RarpRequest(void)
99 printf("RARP broadcast %d\n", ++RarpTry);
102 pkt += NetSetEther(pkt, NetBcastAddr, PROT_RARP);
106 rarp->ar_hrd = htons(ARP_ETHER);
107 rarp->ar_pro = htons(PROT_IP);
110 rarp->ar_op = htons(RARPOP_REQUEST);
112 memcpy(&rarp->ar_data[0], NetOurEther, 6); /* source ET addr */
113 memcpy(&rarp->ar_data[6], &NetOurIP, 4); /* source IP addr */
114 memcpy(&rarp->ar_data[10], NetOurEther, 6); /* dest ET addr = source ET addr ??*/
116 /* Dest. IP addr set to broadcast */
117 for (i = 0; i <= 3; i++)
118 rarp->ar_data[16 + i] = 0xff;
120 NetSendPacket(NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
122 NetSetTimeout(TIMEOUT * CFG_HZ, RarpTimeout);
123 NetSetHandler(RarpHandler);
125 #endif /* CONFIG_CMD_NET */