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gerrit.cesnet.cz / github / trini / u-boot / 77354e9d502837c156149109f4dd36b7bc12d6b3 / . / net / ping.c
blob: 0710b9228d1ea9318901faaf56fdfe4ef68743e3 [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
9 */
10
11#include "ping.h"
12#include "arp.h"
13
14static ushort PingSeqNo;
15
16/* The ip address to ping */
17IPaddr_t NetPingIP;
18
Joe Hershberger4b11c912012-05-23 07:59:07 +0000[diff] [blame]19static void set_icmp_header(uchar *pkt, IPaddr_t dest)
20{
21 /*
22 * Construct an IP and ICMP header.
23 */
24 struct ip_hdr *ip = (struct ip_hdr *)pkt;
25 struct icmp_hdr *icmp = (struct icmp_hdr *)(pkt + IP_HDR_SIZE);
26
27 net_set_ip_header(pkt, dest, NetOurIP);
28
29 ip->ip_len = htons(IP_ICMP_HDR_SIZE);
30 ip->ip_p = IPPROTO_ICMP;
31 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE >> 1);
32
33 icmp->type = ICMP_ECHO_REQUEST;
34 icmp->code = 0;
35 icmp->checksum = 0;
36 icmp->un.echo.id = 0;
37 icmp->un.echo.sequence = htons(PingSeqNo++);
38 icmp->checksum = ~NetCksum((uchar *)icmp, ICMP_HDR_SIZE >> 1);
39}
40
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]41static int ping_send(void)
42{
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]43 uchar *pkt;
Joe Hershberger00f33262012-05-23 07:59:09 +0000[diff] [blame]44 int eth_hdr_size;
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]45
46 /* XXX always send arp request */
47
Joe Hershberger4ef8d532012-05-23 08:01:04 +0000[diff] [blame]48 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &NetPingIP);
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]49
50 NetArpWaitPacketIP = NetPingIP;
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]51
Joe Hershbergere94070c2012-05-23 07:59:24 +0000[diff] [blame]52 eth_hdr_size = NetSetEther(NetTxPacket, NetEtherNullAddr, PROT_IP);
53 pkt = (uchar *)NetTxPacket + eth_hdr_size;
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]54
Joe Hershberger4b11c912012-05-23 07:59:07 +0000[diff] [blame]55 set_icmp_header(pkt, NetPingIP);
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]56
57 /* size of the waiting packet */
Joe Hershberger00f33262012-05-23 07:59:09 +0000[diff] [blame]58 NetArpWaitTxPacketSize = eth_hdr_size + IP_ICMP_HDR_SIZE;
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]59
60 /* and do the ARP request */
61 NetArpWaitTry = 1;
62 NetArpWaitTimerStart = get_timer(0);
63 ArpRequest();
64 return 1; /* waiting */
65}
66
67static void ping_timeout(void)
68{
69 eth_halt();
Joe Hershberger22f6e992012-05-23 07:59:14 +0000[diff] [blame]70 net_set_state(NETLOOP_FAIL); /* we did not get the reply */
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]71}
72
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]73void ping_start(void)
74{
75 printf("Using %s device\n", eth_get_name());
76 NetSetTimeout(10000UL, ping_timeout);
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]77
78 ping_send();
79}
80
Joe Hershbergercb487f52012-05-23 07:58:06 +0000[diff] [blame]81void ping_receive(struct ethernet_hdr *et, struct ip_udp_hdr *ip, int len)
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]82{
Joe Hershbergere0a63072012-05-23 07:58:09 +0000[diff] [blame]83 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]84 IPaddr_t src_ip;
Joe Hershbergere7111012012-05-23 07:59:16 +0000[diff] [blame]85 int eth_hdr_size;
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]86
87 switch (icmph->type) {
88 case ICMP_ECHO_REPLY:
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]89 src_ip = NetReadIP((void *)&ip->ip_src);
Joe Hershberger61da3c22012-05-23 07:59:12 +0000[diff] [blame]90 if (src_ip == NetPingIP)
Joe Hershberger22f6e992012-05-23 07:59:14 +0000[diff] [blame]91 net_set_state(NETLOOP_SUCCESS);
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]92 return;
93 case ICMP_ECHO_REQUEST:
Joe Hershbergere7111012012-05-23 07:59:16 +0000[diff] [blame]94 eth_hdr_size = net_update_ether(et, et->et_src, PROT_IP);
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]95
Joe Hershberger4ef8d532012-05-23 08:01:04 +0000[diff] [blame]96 debug_cond(DEBUG_DEV_PKT, "Got ICMP ECHO REQUEST, return "
Joe Hershbergere7111012012-05-23 07:59:16 +0000[diff] [blame]97 "%d bytes\n", eth_hdr_size + len);
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]98
99 ip->ip_sum = 0;
100 ip->ip_off = 0;
101 NetCopyIP((void *)&ip->ip_dst, &ip->ip_src);
102 NetCopyIP((void *)&ip->ip_src, &NetOurIP);
103 ip->ip_sum = ~NetCksum((uchar *)ip,
Joe Hershbergerc5c59df2012-05-23 07:58:05 +0000[diff] [blame]104 IP_HDR_SIZE >> 1);
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]105
106 icmph->type = ICMP_ECHO_REPLY;
107 icmph->checksum = 0;
108 icmph->checksum = ~NetCksum((uchar *)icmph,
Joe Hershbergerc5c59df2012-05-23 07:58:05 +0000[diff] [blame]109 (len - IP_HDR_SIZE) >> 1);
Joe Hershbergere7111012012-05-23 07:59:16 +0000[diff] [blame]110 NetSendPacket((uchar *)et, eth_hdr_size + len);
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000[diff] [blame]111 return;
112/* default:
113 return;*/
114 }
115}