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