594c26f8a7
Rename IP header related things to IP_UDP. The existing definition of IP_t includes UDP header, so name it to accurately describe the structure. Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
115 lines
2.8 KiB
C
115 lines
2.8 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"
|
|
|
|
#define TIMEOUT 5000UL /* Milliseconds 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.
|
|
*/
|
|
void rarp_receive(struct ip_udp_hdr *ip, unsigned len)
|
|
{
|
|
ARP_t *arp;
|
|
|
|
debug("Got RARP\n");
|
|
arp = (ARP_t *)ip;
|
|
if (len < ARP_HDR_SIZE) {
|
|
printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
|
|
return;
|
|
}
|
|
|
|
if ((ntohs(arp->ar_op) != RARPOP_REPLY) ||
|
|
(ntohs(arp->ar_hrd) != ARP_ETHER) ||
|
|
(ntohs(arp->ar_pro) != PROT_IP) ||
|
|
(arp->ar_hln != 6) || (arp->ar_pln != 4)) {
|
|
|
|
puts("invalid RARP header\n");
|
|
} else {
|
|
NetCopyIP(&NetOurIP, &arp->ar_data[16]);
|
|
if (NetServerIP == 0)
|
|
NetCopyIP(&NetServerIP, &arp->ar_data[6]);
|
|
memcpy(NetServerEther, &arp->ar_data[0], 6);
|
|
debug("Got good RARP\n");
|
|
net_auto_load();
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Timeout on BOOTP request.
|
|
*/
|
|
static void RarpTimeout(void)
|
|
{
|
|
if (RarpTry >= TIMEOUT_COUNT) {
|
|
puts("\nRetry count exceeded; starting again\n");
|
|
NetStartAgain();
|
|
} else {
|
|
NetSetTimeout(TIMEOUT, RarpTimeout);
|
|
RarpRequest();
|
|
}
|
|
}
|
|
|
|
|
|
void RarpRequest(void)
|
|
{
|
|
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 */
|
|
/* dest ET addr = source ET addr ??*/
|
|
memcpy(&rarp->ar_data[10], NetOurEther, 6);
|
|
/* dest IP addr set to broadcast */
|
|
memset(&rarp->ar_data[16], 0xff, 4);
|
|
|
|
NetSendPacket(NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
|
|
|
|
NetSetTimeout(TIMEOUT, RarpTimeout);
|
|
}
|