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Tom Rinif739fcd2018-05-07 17:02:21 -04001// SPDX-License-Identifier: GPL-2.0
Joe Hershbergera36b12f2012-05-23 07:58:02 +00002/*
3 * Copied from Linux Monitor (LiMon) - Networking.
4 *
5 * Copyright 1994 - 2000 Neil Russell.
6 * (See License)
7 * Copyright 2000 Roland Borde
8 * Copyright 2000 Paolo Scaffardi
9 * Copyright 2000-2002 Wolfgang Denk, wd@denx.de
10 */
11
12#include "ping.h"
13#include "arp.h"
14
Joe Hershberger331db5a2015-04-08 01:41:13 -050015static ushort ping_seq_number;
Joe Hershbergera36b12f2012-05-23 07:58:02 +000016
17/* The ip address to ping */
Joe Hershberger049a95a2015-04-08 01:41:01 -050018struct in_addr net_ping_ip;
Joe Hershbergera36b12f2012-05-23 07:58:02 +000019
Joe Hershberger049a95a2015-04-08 01:41:01 -050020static void set_icmp_header(uchar *pkt, struct in_addr dest)
Joe Hershberger4b11c912012-05-23 07:59:07 +000021{
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
Joe Hershberger049a95a2015-04-08 01:41:01 -050028 net_set_ip_header(pkt, dest, net_ip);
Joe Hershberger4b11c912012-05-23 07:59:07 +000029
30 ip->ip_len = htons(IP_ICMP_HDR_SIZE);
31 ip->ip_p = IPPROTO_ICMP;
Simon Glass0da0fcd2015-01-19 22:16:08 -070032 ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE);
Joe Hershberger4b11c912012-05-23 07:59:07 +000033
34 icmp->type = ICMP_ECHO_REQUEST;
35 icmp->code = 0;
36 icmp->checksum = 0;
37 icmp->un.echo.id = 0;
Joe Hershberger331db5a2015-04-08 01:41:13 -050038 icmp->un.echo.sequence = htons(ping_seq_number++);
Simon Glass0da0fcd2015-01-19 22:16:08 -070039 icmp->checksum = compute_ip_checksum(icmp, ICMP_HDR_SIZE);
Joe Hershberger4b11c912012-05-23 07:59:07 +000040}
41
Joe Hershbergera36b12f2012-05-23 07:58:02 +000042static int ping_send(void)
43{
Joe Hershbergera36b12f2012-05-23 07:58:02 +000044 uchar *pkt;
Joe Hershberger00f33262012-05-23 07:59:09 +000045 int eth_hdr_size;
Joe Hershbergera36b12f2012-05-23 07:58:02 +000046
47 /* XXX always send arp request */
48
Joe Hershberger049a95a2015-04-08 01:41:01 -050049 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &net_ping_ip);
Joe Hershbergera36b12f2012-05-23 07:58:02 +000050
Joe Hershberger049a95a2015-04-08 01:41:01 -050051 net_arp_wait_packet_ip = net_ping_ip;
Joe Hershbergera36b12f2012-05-23 07:58:02 +000052
Joe Hershberger1203fcc2015-04-08 01:41:05 -050053 eth_hdr_size = net_set_ether(net_tx_packet, net_null_ethaddr, PROT_IP);
54 pkt = (uchar *)net_tx_packet + eth_hdr_size;
Joe Hershbergera36b12f2012-05-23 07:58:02 +000055
Joe Hershberger049a95a2015-04-08 01:41:01 -050056 set_icmp_header(pkt, net_ping_ip);
Joe Hershbergera36b12f2012-05-23 07:58:02 +000057
58 /* size of the waiting packet */
Joe Hershberger85d25e02015-04-08 01:41:08 -050059 arp_wait_tx_packet_size = eth_hdr_size + IP_ICMP_HDR_SIZE;
Joe Hershbergera36b12f2012-05-23 07:58:02 +000060
61 /* and do the ARP request */
Joe Hershberger85d25e02015-04-08 01:41:08 -050062 arp_wait_try = 1;
63 arp_wait_timer_start = get_timer(0);
64 arp_request();
Joe Hershbergera36b12f2012-05-23 07:58:02 +000065 return 1; /* waiting */
66}
67
Joe Hershberger331db5a2015-04-08 01:41:13 -050068static void ping_timeout_handler(void)
Joe Hershbergera36b12f2012-05-23 07:58:02 +000069{
70 eth_halt();
Joe Hershberger22f6e992012-05-23 07:59:14 +000071 net_set_state(NETLOOP_FAIL); /* we did not get the reply */
Joe Hershbergera36b12f2012-05-23 07:58:02 +000072}
73
Joe Hershbergera36b12f2012-05-23 07:58:02 +000074void ping_start(void)
75{
76 printf("Using %s device\n", eth_get_name());
Joe Hershbergerbc0571f2015-04-08 01:41:21 -050077 net_set_timeout_handler(10000UL, ping_timeout_handler);
Joe Hershbergera36b12f2012-05-23 07:58:02 +000078
79 ping_send();
80}
81
Joe Hershbergercb487f52012-05-23 07:58:06 +000082void ping_receive(struct ethernet_hdr *et, struct ip_udp_hdr *ip, int len)
Joe Hershbergera36b12f2012-05-23 07:58:02 +000083{
Joe Hershbergere0a63072012-05-23 07:58:09 +000084 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
Joe Hershberger049a95a2015-04-08 01:41:01 -050085 struct in_addr src_ip;
Joe Hershbergere7111012012-05-23 07:59:16 +000086 int eth_hdr_size;
Joe Hershbergera36b12f2012-05-23 07:58:02 +000087
88 switch (icmph->type) {
89 case ICMP_ECHO_REPLY:
Joe Hershberger049a95a2015-04-08 01:41:01 -050090 src_ip = net_read_ip((void *)&ip->ip_src);
91 if (src_ip.s_addr == net_ping_ip.s_addr)
Joe Hershberger22f6e992012-05-23 07:59:14 +000092 net_set_state(NETLOOP_SUCCESS);
Joe Hershbergera36b12f2012-05-23 07:58:02 +000093 return;
94 case ICMP_ECHO_REQUEST:
Joe Hershbergere7111012012-05-23 07:59:16 +000095 eth_hdr_size = net_update_ether(et, et->et_src, PROT_IP);
Joe Hershbergera36b12f2012-05-23 07:58:02 +000096
Joe Hershberger331db5a2015-04-08 01:41:13 -050097 debug_cond(DEBUG_DEV_PKT,
98 "Got ICMP ECHO REQUEST, return %d bytes\n",
99 eth_hdr_size + len);
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000100
101 ip->ip_sum = 0;
102 ip->ip_off = 0;
Joe Hershberger049a95a2015-04-08 01:41:01 -0500103 net_copy_ip((void *)&ip->ip_dst, &ip->ip_src);
104 net_copy_ip((void *)&ip->ip_src, &net_ip);
Simon Glass0da0fcd2015-01-19 22:16:08 -0700105 ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE);
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000106
107 icmph->type = ICMP_ECHO_REPLY;
108 icmph->checksum = 0;
Simon Glass0da0fcd2015-01-19 22:16:08 -0700109 icmph->checksum = compute_ip_checksum(icmph, len - IP_HDR_SIZE);
Joe Hershberger1203fcc2015-04-08 01:41:05 -0500110 net_send_packet((uchar *)et, eth_hdr_size + len);
Joe Hershbergera36b12f2012-05-23 07:58:02 +0000111 return;
112/* default:
113 return;*/
114 }
115}