1 // SPDX-License-Identifier: GPL-2.0
3 * Copied from Linux Monitor (LiMon) - Networking.
5 * Copyright 1994 - 2000 Neil Russell.
7 * Copyright 2000 Roland Borde
8 * Copyright 2000 Paolo Scaffardi
9 * Copyright 2000-2002 Wolfgang Denk, wd@denx.de
16 static ushort ping_seq_number;
18 /* The ip address to ping */
19 struct in_addr net_ping_ip;
21 static void set_icmp_header(uchar *pkt, struct in_addr dest)
24 * Construct an IP and ICMP header.
26 struct icmp_hdr *icmp = (struct icmp_hdr *)(pkt + IP_HDR_SIZE);
28 net_set_ip_header(pkt, dest, net_ip, IP_ICMP_HDR_SIZE, IPPROTO_ICMP);
30 icmp->type = ICMP_ECHO_REQUEST;
34 icmp->un.echo.sequence = htons(ping_seq_number++);
35 icmp->checksum = compute_ip_checksum(icmp, ICMP_HDR_SIZE);
38 static int ping_send(void)
43 /* XXX always send arp request */
45 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &net_ping_ip);
47 net_arp_wait_packet_ip = net_ping_ip;
49 eth_hdr_size = net_set_ether(net_tx_packet, net_null_ethaddr, PROT_IP);
50 pkt = (uchar *)net_tx_packet + eth_hdr_size;
52 set_icmp_header(pkt, net_ping_ip);
54 /* size of the waiting packet */
55 arp_wait_tx_packet_size = eth_hdr_size + IP_ICMP_HDR_SIZE;
57 /* and do the ARP request */
59 arp_wait_timer_start = get_timer(0);
61 return 1; /* waiting */
64 static void ping_timeout_handler(void)
67 net_set_state(NETLOOP_FAIL); /* we did not get the reply */
72 printf("Using %s device\n", eth_get_name());
73 net_set_timeout_handler(10000UL, ping_timeout_handler);
78 void ping_receive(struct ethernet_hdr *et, struct ip_udp_hdr *ip, int len)
80 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
81 struct in_addr src_ip;
85 switch (icmph->type) {
87 src_ip = net_read_ip((void *)&ip->ip_src);
88 if (src_ip.s_addr == net_ping_ip.s_addr)
89 net_set_state(NETLOOP_SUCCESS);
91 case ICMP_ECHO_REQUEST:
92 eth_hdr_size = net_update_ether(et, et->et_src, PROT_IP);
94 debug_cond(DEBUG_DEV_PKT,
95 "Got ICMP ECHO REQUEST, return %d bytes\n",
100 net_copy_ip((void *)&ip->ip_dst, &ip->ip_src);
101 net_copy_ip((void *)&ip->ip_src, &net_ip);
102 ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE);
104 icmph->type = ICMP_ECHO_REPLY;
106 icmph->checksum = compute_ip_checksum(icmph, len - IP_HDR_SIZE);
108 tx_packet = net_get_async_tx_pkt_buf();
109 memcpy(tx_packet, et, eth_hdr_size + len);
110 net_send_packet(tx_packet, eth_hdr_size + len);