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git.ipfire.org Git - people/ms/u-boot.git/blob - net/rarp.c
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 #define TIMEOUT 5000UL /* Milliseconds before trying BOOTP again */
35 #ifndef CONFIG_NET_RETRY_COUNT
36 # define TIMEOUT_COUNT 5 /* # of timeouts before giving up */
38 # define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT)
45 * Handle a RARP received packet.
48 RarpHandler(uchar
* dummi0
, unsigned dummi1
, unsigned dummi2
, unsigned dummi3
)
51 debug("Got good RARP\n");
52 if ((s
= getenv("autoload")) != NULL
) {
55 * Just use RARP to configure system;
56 * Do not use TFTP/NFS to to load the bootfile.
58 NetState
= NETLOOP_SUCCESS
;
60 #if defined(CONFIG_CMD_NFS)
61 } else if ((s
!= NULL
) && !strcmp(s
, "NFS")) {
72 * Timeout on BOOTP request.
77 if (RarpTry
>= TIMEOUT_COUNT
) {
78 puts ("\nRetry count exceeded; starting again\n");
81 NetSetTimeout (TIMEOUT
, RarpTimeout
);
94 printf("RARP broadcast %d\n", ++RarpTry
);
97 pkt
+= NetSetEther(pkt
, NetBcastAddr
, PROT_RARP
);
101 rarp
->ar_hrd
= htons (ARP_ETHER
);
102 rarp
->ar_pro
= htons (PROT_IP
);
105 rarp
->ar_op
= htons (RARPOP_REQUEST
);
106 memcpy (&rarp
->ar_data
[0], NetOurEther
, 6); /* source ET addr */
107 memcpy (&rarp
->ar_data
[6], &NetOurIP
, 4); /* source IP addr */
108 memcpy (&rarp
->ar_data
[10], NetOurEther
, 6); /* dest ET addr = source ET addr ??*/
109 /* dest. IP addr set to broadcast */
110 for (i
= 0; i
<= 3; i
++) {
111 rarp
->ar_data
[16 + i
] = 0xff;
114 NetSendPacket(NetTxPacket
, (pkt
- NetTxPacket
) + ARP_HDR_SIZE
);
116 NetSetTimeout(TIMEOUT
, RarpTimeout
);
117 NetSetHandler(RarpHandler
);