Git Repo - J-u-boot.git/blame_incremental

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Commit	Line	Data
	1	// SPDX-License-Identifier: GPL-2.0+
	2	/*
	3	* (C) Copyright 2000-2002
	4	* Wolfgang Denk, DENX Software Engineering, [email protected].
	5	*/
	6
	7	#include <command.h>
	8	#include <log.h>
	9	#include <net.h>
	10	#include <net/tftp.h>
	11	#include "nfs.h"
	12	#include "bootp.h"
	13	#include "rarp.h"
	14
	15	#define TIMEOUT 5000UL /* Milliseconds before trying BOOTP again */
	16
	17	int rarp_try;
	18
	19	/*
	20	* Handle a RARP received packet.
	21	*/
	22	void rarp_receive(struct ip_udp_hdr *ip, unsigned len)
	23	{
	24	struct arp_hdr *arp;
	25
	26	debug_cond(DEBUG_NET_PKT, "Got RARP\n");
	27	arp = (struct arp_hdr *)ip;
	28	if (len < ARP_HDR_SIZE) {
	29	printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
	30	return;
	31	}
	32
	33	if ((ntohs(arp->ar_op) != RARPOP_REPLY) \|\|
	34	(ntohs(arp->ar_hrd) != ARP_ETHER) \|\|
	35	(ntohs(arp->ar_pro) != PROT_IP) \|\|
	36	(arp->ar_hln != 6) \|\| (arp->ar_pln != 4)) {
	37	puts("invalid RARP header\n");
	38	} else {
	39	net_copy_ip(&net_ip, &arp->ar_data[16]);
	40	if (net_server_ip.s_addr == 0)
	41	net_copy_ip(&net_server_ip, &arp->ar_data[6]);
	42	memcpy(net_server_ethaddr, &arp->ar_data[0], 6);
	43	debug_cond(DEBUG_DEV_PKT, "Got good RARP\n");
	44	net_auto_load();
	45	}
	46	}
	47
	48
	49	/*
	50	* Timeout on BOOTP request.
	51	*/
	52	static void rarp_timeout_handler(void)
	53	{
	54	if (rarp_try >= CONFIG_NET_RETRY_COUNT) {
	55	puts("\nRetry count exceeded; starting again\n");
	56	net_start_again();
	57	} else {
	58	net_set_timeout_handler(TIMEOUT, rarp_timeout_handler);
	59	rarp_request();
	60	}
	61	}
	62
	63
	64	void rarp_request(void)
	65	{
	66	uchar *pkt;
	67	struct arp_hdr *rarp;
	68	int eth_hdr_size;
	69
	70	printf("RARP broadcast %d\n", ++rarp_try);
	71	pkt = net_tx_packet;
	72
	73	eth_hdr_size = net_set_ether(pkt, net_bcast_ethaddr, PROT_RARP);
	74	pkt += eth_hdr_size;
	75
	76	rarp = (struct arp_hdr *)pkt;
	77
	78	rarp->ar_hrd = htons(ARP_ETHER);
	79	rarp->ar_pro = htons(PROT_IP);
	80	rarp->ar_hln = 6;
	81	rarp->ar_pln = 4;
	82	rarp->ar_op = htons(RARPOP_REQUEST);
	83	memcpy(&rarp->ar_data[0], net_ethaddr, 6); /* source ET addr */
	84	memcpy(&rarp->ar_data[6], &net_ip, 4); /* source IP addr */
	85	/* dest ET addr = source ET addr ??*/
	86	memcpy(&rarp->ar_data[10], net_ethaddr, 6);
	87	/* dest IP addr set to broadcast */
	88	memset(&rarp->ar_data[16], 0xff, 4);
	89
	90	net_send_packet(net_tx_packet, eth_hdr_size + ARP_HDR_SIZE);
	91
	92	net_set_timeout_handler(TIMEOUT, rarp_timeout_handler);
	93	}