123 lines
2.9 KiB
C
123 lines
2.9 KiB
C
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/*
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* (C) Copyright 2000-2002
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <command.h>
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#include <net.h>
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#include "nfs.h"
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#include "bootp.h"
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#include "rarp.h"
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#include "tftp.h"
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#if (CONFIG_COMMANDS & CFG_CMD_NET)
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#define TIMEOUT 5 /* Seconds before trying BOOTP again */
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#ifndef CONFIG_NET_RETRY_COUNT
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# define TIMEOUT_COUNT 5 /* # of timeouts before giving up */
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#else
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# define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT)
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#endif
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int RarpTry;
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/*
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* Handle a RARP received packet.
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*/
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static void
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RarpHandler(uchar * dummi0, unsigned dummi1, unsigned dummi2, unsigned dummi3)
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{
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char *s;
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#ifdef DEBUG
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puts ("Got good RARP\n");
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#endif
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if ((s = getenv("autoload")) != NULL) {
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if (*s == 'n') {
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/*
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* Just use RARP to configure system;
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* Do not use TFTP/NFS to to load the bootfile.
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*/
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NetState = NETLOOP_SUCCESS;
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return;
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#if (CONFIG_COMMANDS & CFG_CMD_NFS)
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} else if ((s != NULL) && !strcmp(s, "NFS")) {
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NfsStart();
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return;
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#endif
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}
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}
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TftpStart ();
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}
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/*
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* Timeout on BOOTP request.
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*/
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static void
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RarpTimeout(void)
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{
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if (RarpTry >= TIMEOUT_COUNT) {
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puts ("\nRetry count exceeded; starting again\n");
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NetStartAgain ();
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} else {
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NetSetTimeout (TIMEOUT * CFG_HZ, RarpTimeout);
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RarpRequest ();
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}
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}
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void
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RarpRequest (void)
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{
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int i;
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volatile uchar *pkt;
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ARP_t * rarp;
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printf("RARP broadcast %d\n", ++RarpTry);
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pkt = NetTxPacket;
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pkt += NetSetEther(pkt, NetBcastAddr, PROT_RARP);
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rarp = (ARP_t *)pkt;
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rarp->ar_hrd = htons (ARP_ETHER);
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rarp->ar_pro = htons (PROT_IP);
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rarp->ar_hln = 6;
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rarp->ar_pln = 4;
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rarp->ar_op = htons (RARPOP_REQUEST);
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memcpy (&rarp->ar_data[0], NetOurEther, 6); /* source ET addr */
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memcpy (&rarp->ar_data[6], &NetOurIP, 4); /* source IP addr */
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memcpy (&rarp->ar_data[10], NetOurEther, 6); /* dest ET addr = source ET addr ??*/
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/* dest. IP addr set to broadcast */
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for (i = 0; i <= 3; i++) {
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rarp->ar_data[16 + i] = 0xff;
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}
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NetSendPacket(NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
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NetSetTimeout(TIMEOUT * CFG_HZ, RarpTimeout);
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NetSetHandler(RarpHandler);
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}
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#endif /* CFG_CMD_NET */
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