2 * Copied from Linux Monitor (LiMon) - Networking.
4 * Copyright 1994 - 2000 Neil Russell.
6 * Copyright 2000 Roland Borde
7 * Copyright 2000 Paolo Scaffardi
8 * Copyright 2000-2002 Wolfgang Denk, wd@denx.de
14 static ushort PingSeqNo;
16 /* The ip address to ping */
19 static void set_icmp_header(uchar *pkt, IPaddr_t dest)
22 * Construct an IP and ICMP header.
24 struct ip_hdr *ip = (struct ip_hdr *)pkt;
25 struct icmp_hdr *icmp = (struct icmp_hdr *)(pkt + IP_HDR_SIZE);
27 net_set_ip_header(pkt, dest, NetOurIP);
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);
33 icmp->type = ICMP_ECHO_REQUEST;
37 icmp->un.echo.sequence = htons(PingSeqNo++);
38 icmp->checksum = ~NetCksum((uchar *)icmp, ICMP_HDR_SIZE >> 1);
41 static int ping_send(void)
46 /* XXX always send arp request */
48 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &NetPingIP);
50 NetArpWaitPacketIP = NetPingIP;
52 eth_hdr_size = NetSetEther(NetTxPacket, NetEtherNullAddr, PROT_IP);
53 pkt = (uchar *)NetTxPacket + eth_hdr_size;
55 set_icmp_header(pkt, NetPingIP);
57 /* size of the waiting packet */
58 NetArpWaitTxPacketSize = eth_hdr_size + IP_ICMP_HDR_SIZE;
60 /* and do the ARP request */
62 NetArpWaitTimerStart = get_timer(0);
64 return 1; /* waiting */
67 static void ping_timeout(void)
70 net_set_state(NETLOOP_FAIL); /* we did not get the reply */
75 printf("Using %s device\n", eth_get_name());
76 NetSetTimeout(10000UL, ping_timeout);
81 void ping_receive(struct ethernet_hdr *et, struct ip_udp_hdr *ip, int len)
83 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
87 switch (icmph->type) {
89 src_ip = NetReadIP((void *)&ip->ip_src);
90 if (src_ip == NetPingIP)
91 net_set_state(NETLOOP_SUCCESS);
93 case ICMP_ECHO_REQUEST:
94 eth_hdr_size = net_update_ether(et, et->et_src, PROT_IP);
96 debug_cond(DEBUG_DEV_PKT, "Got ICMP ECHO REQUEST, return "
97 "%d bytes\n", eth_hdr_size + len);
101 NetCopyIP((void *)&ip->ip_dst, &ip->ip_src);
102 NetCopyIP((void *)&ip->ip_src, &NetOurIP);
103 ip->ip_sum = ~NetCksum((uchar *)ip,
106 icmph->type = ICMP_ECHO_REPLY;
108 icmph->checksum = ~NetCksum((uchar *)icmph,
109 (len - IP_HDR_SIZE) >> 1);
110 NetSendPacket((uchar *)et, eth_hdr_size + len);