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gerrit.cesnet.cz / github / trini / u-boot / fce6900b492c18962a098eae837ea345b75f9a75 / . / net / ping.c
blob: 366f51825f9ecbff62354eeae1aeb2c49b4aa25b [file] [log] [blame]
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]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
Wolfgang Denk2ea91032014-09-30 10:44:01 +0200[diff] [blame]9 * SPDX-License-Identifier: GPL-2.0
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]10 */
11
12#include "ping.h"
13#include "arp.h"
14
15static ushort PingSeqNo;
16
17/* The ip address to ping */
18IPaddr_t NetPingIP;
19
Joe Hershberger4b11c912012-05-23 07:59:07 +0000[diff] [blame]20static void set_icmp_header(uchar *pkt, IPaddr_t dest)
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
28 net_set_ip_header(pkt, dest, NetOurIP);
29
30 ip->ip_len = htons(IP_ICMP_HDR_SIZE);
31 ip->ip_p = IPPROTO_ICMP;
Simon Glass0da0fcd2015-01-19 22:16:08 -0700[diff] [blame]32 ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE);
Joe Hershberger4b11c912012-05-23 07:59:07 +0000[diff] [blame]33
34 icmp->type = ICMP_ECHO_REQUEST;
35 icmp->code = 0;
36 icmp->checksum = 0;
37 icmp->un.echo.id = 0;
38 icmp->un.echo.sequence = htons(PingSeqNo++);
Simon Glass0da0fcd2015-01-19 22:16:08 -0700[diff] [blame]39 icmp->checksum = compute_ip_checksum(icmp, ICMP_HDR_SIZE);
Joe Hershberger4b11c912012-05-23 07:59:07 +0000[diff] [blame]40}
41
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]42static int ping_send(void)
43{
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]44 uchar *pkt;
Joe Hershberger00f33262012-05-23 07:59:09 +0000[diff] [blame]45 int eth_hdr_size;
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]46
47 /* XXX always send arp request */
48
Joe Hershberger4ef8d532012-05-23 08:01:04 +0000[diff] [blame]49 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &NetPingIP);
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]50
51 NetArpWaitPacketIP = NetPingIP;
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]52
Joe Hershbergere94070c2012-05-23 07:59:24 +0000[diff] [blame]53 eth_hdr_size = NetSetEther(NetTxPacket, NetEtherNullAddr, PROT_IP);
54 pkt = (uchar *)NetTxPacket + eth_hdr_size;
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]55
Joe Hershberger4b11c912012-05-23 07:59:07 +0000[diff] [blame]56 set_icmp_header(pkt, NetPingIP);
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]57
58 /* size of the waiting packet */
Joe Hershberger00f33262012-05-23 07:59:09 +0000[diff] [blame]59 NetArpWaitTxPacketSize = eth_hdr_size + IP_ICMP_HDR_SIZE;
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]60
61 /* and do the ARP request */
62 NetArpWaitTry = 1;
63 NetArpWaitTimerStart = get_timer(0);
64 ArpRequest();
65 return 1; /* waiting */
66}
67
68static void ping_timeout(void)
69{
70 eth_halt();
Joe Hershberger22f6e992012-05-23 07:59:14 +0000[diff] [blame]71 net_set_state(NETLOOP_FAIL); /* we did not get the reply */
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]72}
73
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]74void ping_start(void)
75{
76 printf("Using %s device\n", eth_get_name());
77 NetSetTimeout(10000UL, ping_timeout);
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]78
79 ping_send();
80}
81
Joe Hershbergercb487f52012-05-23 07:58:06 +0000[diff] [blame]82void ping_receive(struct ethernet_hdr *et, struct ip_udp_hdr *ip, int len)
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]83{
Joe Hershbergere0a63072012-05-23 07:58:09 +0000[diff] [blame]84 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]85 IPaddr_t src_ip;
Joe Hershbergere7111012012-05-23 07:59:16 +0000[diff] [blame]86 int eth_hdr_size;
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]87
88 switch (icmph->type) {
89 case ICMP_ECHO_REPLY:
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]90 src_ip = NetReadIP((void *)&ip->ip_src);
Joe Hershberger61da3c22012-05-23 07:59:12 +0000[diff] [blame]91 if (src_ip == NetPingIP)
Joe Hershberger22f6e992012-05-23 07:59:14 +0000[diff] [blame]92 net_set_state(NETLOOP_SUCCESS);
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]93 return;
94 case ICMP_ECHO_REQUEST:
Joe Hershbergere7111012012-05-23 07:59:16 +0000[diff] [blame]95 eth_hdr_size = net_update_ether(et, et->et_src, PROT_IP);
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]96
Joe Hershberger4ef8d532012-05-23 08:01:04 +0000[diff] [blame]97 debug_cond(DEBUG_DEV_PKT, "Got ICMP ECHO REQUEST, return "
Joe Hershbergere7111012012-05-23 07:59:16 +0000[diff] [blame]98 "%d bytes\n", eth_hdr_size + len);
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]99
100 ip->ip_sum = 0;
101 ip->ip_off = 0;
102 NetCopyIP((void *)&ip->ip_dst, &ip->ip_src);
103 NetCopyIP((void *)&ip->ip_src, &NetOurIP);
Simon Glass0da0fcd2015-01-19 22:16:08 -0700[diff] [blame]104 ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE);
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]105
106 icmph->type = ICMP_ECHO_REPLY;
107 icmph->checksum = 0;
Simon Glass0da0fcd2015-01-19 22:16:08 -0700[diff] [blame]108 icmph->checksum = compute_ip_checksum(icmph, len - IP_HDR_SIZE);
Joe Hershbergere7111012012-05-23 07:59:16 +0000[diff] [blame]109 NetSendPacket((uchar *)et, eth_hdr_size + len);
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]110 return;
111/* default:
112 return;*/
113 }
114}