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Merge branch 'master' of git://git.denx.de/u-boot-net
[people/ms/u-boot.git] / net / ping.c
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1/*
2 * Copied from Linux Monitor (LiMon) - Networking.
3 *
4 * Copyright 1994 - 2000 Neil Russell.
5 * (See License)
6 * Copyright 2000 Roland Borde
7 * Copyright 2000 Paolo Scaffardi
8 * Copyright 2000-2002 Wolfgang Denk, wd@denx.de
2ea91039 9 * SPDX-License-Identifier: GPL-2.0
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10 */
11
12#include "ping.h"
13#include "arp.h"
14
331db5a9 15static ushort ping_seq_number;
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16
17/* The ip address to ping */
049a95a7 18struct in_addr net_ping_ip;
a36b12f9 19
049a95a7 20static void set_icmp_header(uchar *pkt, struct in_addr dest)
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21{
22 /*
23 * Construct an IP and ICMP header.
24 */
25 struct ip_hdr *ip = (struct ip_hdr *)pkt;
26 struct icmp_hdr *icmp = (struct icmp_hdr *)(pkt + IP_HDR_SIZE);
27
049a95a7 28 net_set_ip_header(pkt, dest, net_ip);
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29
30 ip->ip_len = htons(IP_ICMP_HDR_SIZE);
31 ip->ip_p = IPPROTO_ICMP;
0da0fcd5 32 ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE);
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33
34 icmp->type = ICMP_ECHO_REQUEST;
35 icmp->code = 0;
36 icmp->checksum = 0;
37 icmp->un.echo.id = 0;
331db5a9 38 icmp->un.echo.sequence = htons(ping_seq_number++);
0da0fcd5 39 icmp->checksum = compute_ip_checksum(icmp, ICMP_HDR_SIZE);
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40}
41
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42static int ping_send(void)
43{
a36b12f9 44 uchar *pkt;
00f33268 45 int eth_hdr_size;
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46
47 /* XXX always send arp request */
48
049a95a7 49 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &net_ping_ip);
a36b12f9 50
049a95a7 51 net_arp_wait_packet_ip = net_ping_ip;
a36b12f9 52
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53 eth_hdr_size = net_set_ether(net_tx_packet, net_null_ethaddr, PROT_IP);
54 pkt = (uchar *)net_tx_packet + eth_hdr_size;
a36b12f9 55
049a95a7 56 set_icmp_header(pkt, net_ping_ip);
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57
58 /* size of the waiting packet */
85d25e0e 59 arp_wait_tx_packet_size = eth_hdr_size + IP_ICMP_HDR_SIZE;
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60
61 /* and do the ARP request */
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62 arp_wait_try = 1;
63 arp_wait_timer_start = get_timer(0);
64 arp_request();
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65 return 1; /* waiting */
66}
67
331db5a9 68static void ping_timeout_handler(void)
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69{
70 eth_halt();
22f6e99d 71 net_set_state(NETLOOP_FAIL); /* we did not get the reply */
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72}
73
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74void ping_start(void)
75{
76 printf("Using %s device\n", eth_get_name());
bc0571fc 77 net_set_timeout_handler(10000UL, ping_timeout_handler);
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78
79 ping_send();
80}
81
cb487f56 82void ping_receive(struct ethernet_hdr *et, struct ip_udp_hdr *ip, int len)
a36b12f9 83{
e0a63079 84 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
049a95a7 85 struct in_addr src_ip;
e7111015 86 int eth_hdr_size;
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87
88 switch (icmph->type) {
89 case ICMP_ECHO_REPLY:
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90 src_ip = net_read_ip((void *)&ip->ip_src);
91 if (src_ip.s_addr == net_ping_ip.s_addr)
22f6e99d 92 net_set_state(NETLOOP_SUCCESS);
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93 return;
94 case ICMP_ECHO_REQUEST:
e7111015 95 eth_hdr_size = net_update_ether(et, et->et_src, PROT_IP);
a36b12f9 96
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97 debug_cond(DEBUG_DEV_PKT,
98 "Got ICMP ECHO REQUEST, return %d bytes\n",
99 eth_hdr_size + len);
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100
101 ip->ip_sum = 0;
102 ip->ip_off = 0;
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103 net_copy_ip((void *)&ip->ip_dst, &ip->ip_src);
104 net_copy_ip((void *)&ip->ip_src, &net_ip);
0da0fcd5 105 ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE);
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106
107 icmph->type = ICMP_ECHO_REPLY;
108 icmph->checksum = 0;
0da0fcd5 109 icmph->checksum = compute_ip_checksum(icmph, len - IP_HDR_SIZE);
1203fcce 110 net_send_packet((uchar *)et, eth_hdr_size + len);
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111 return;
112/* default:
113 return;*/
114 }
115}