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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
94 lines
2.2 KiB
C
94 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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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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#include <common.h>
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#include <command.h>
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#include <log.h>
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#include <net.h>
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#include <net/tftp.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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#define TIMEOUT 5000UL /* Milliseconds before trying BOOTP again */
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int rarp_try;
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/*
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* Handle a RARP received packet.
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*/
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void rarp_receive(struct ip_udp_hdr *ip, unsigned len)
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{
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struct arp_hdr *arp;
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debug_cond(DEBUG_NET_PKT, "Got RARP\n");
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arp = (struct arp_hdr *)ip;
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if (len < ARP_HDR_SIZE) {
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printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
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return;
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}
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if ((ntohs(arp->ar_op) != RARPOP_REPLY) ||
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(ntohs(arp->ar_hrd) != ARP_ETHER) ||
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(ntohs(arp->ar_pro) != PROT_IP) ||
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(arp->ar_hln != 6) || (arp->ar_pln != 4)) {
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puts("invalid RARP header\n");
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} else {
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net_copy_ip(&net_ip, &arp->ar_data[16]);
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if (net_server_ip.s_addr == 0)
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net_copy_ip(&net_server_ip, &arp->ar_data[6]);
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memcpy(net_server_ethaddr, &arp->ar_data[0], 6);
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debug_cond(DEBUG_DEV_PKT, "Got good RARP\n");
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net_auto_load();
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}
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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 rarp_timeout_handler(void)
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{
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if (rarp_try >= CONFIG_NET_RETRY_COUNT) {
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puts("\nRetry count exceeded; starting again\n");
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net_start_again();
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} else {
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net_set_timeout_handler(TIMEOUT, rarp_timeout_handler);
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rarp_request();
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}
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}
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void rarp_request(void)
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{
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uchar *pkt;
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struct arp_hdr *rarp;
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int eth_hdr_size;
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printf("RARP broadcast %d\n", ++rarp_try);
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pkt = net_tx_packet;
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eth_hdr_size = net_set_ether(pkt, net_bcast_ethaddr, PROT_RARP);
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pkt += eth_hdr_size;
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rarp = (struct arp_hdr *)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], net_ethaddr, 6); /* source ET addr */
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memcpy(&rarp->ar_data[6], &net_ip, 4); /* source IP addr */
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/* dest ET addr = source ET addr ??*/
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memcpy(&rarp->ar_data[10], net_ethaddr, 6);
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/* dest IP addr set to broadcast */
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memset(&rarp->ar_data[16], 0xff, 4);
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net_send_packet(net_tx_packet, eth_hdr_size + ARP_HDR_SIZE);
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net_set_timeout_handler(TIMEOUT, rarp_timeout_handler);
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}
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