83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
99 lines
2.3 KiB
C
99 lines
2.3 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 <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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#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 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 >= TIMEOUT_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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