e0a630795b
Remove typedef and lower-case name Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
141 lines
3.2 KiB
C
141 lines
3.2 KiB
C
/*
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* Copied from Linux Monitor (LiMon) - Networking.
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*
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* Copyright 1994 - 2000 Neil Russell.
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* (See License)
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* Copyright 2000 Roland Borde
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* Copyright 2000 Paolo Scaffardi
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* Copyright 2000-2002 Wolfgang Denk, wd@denx.de
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*/
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#include "ping.h"
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#include "arp.h"
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static ushort PingSeqNo;
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/* The ip address to ping */
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IPaddr_t NetPingIP;
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static int ping_send(void)
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{
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static uchar mac[6];
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struct ip_udp_hdr *ip;
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ushort *s;
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uchar *pkt;
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/* XXX always send arp request */
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memcpy(mac, NetEtherNullAddr, 6);
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debug("sending ARP for %pI4\n", &NetPingIP);
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NetArpWaitPacketIP = NetPingIP;
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NetArpWaitPacketMAC = mac;
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pkt = NetArpWaitTxPacket;
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pkt += NetSetEther(pkt, mac, PROT_IP);
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ip = (struct ip_udp_hdr *)pkt;
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/*
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* Construct an IP and ICMP header.
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* (need to set no fragment bit - XXX)
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*/
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/* IP_HDR_SIZE / 4 (not including UDP) */
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ip->ip_hl_v = 0x45;
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ip->ip_tos = 0;
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ip->ip_len = htons(IP_HDR_SIZE + 8);
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ip->ip_id = htons(NetIPID++);
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ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
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ip->ip_ttl = 255;
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ip->ip_p = 0x01; /* ICMP */
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ip->ip_sum = 0;
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/* already in network byte order */
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NetCopyIP((void *)&ip->ip_src, &NetOurIP);
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/* - "" - */
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NetCopyIP((void *)&ip->ip_dst, &NetPingIP);
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ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE / 2);
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s = &ip->udp_src; /* XXX ICMP starts here */
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s[0] = htons(0x0800); /* echo-request, code */
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s[1] = 0; /* checksum */
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s[2] = 0; /* identifier */
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s[3] = htons(PingSeqNo++); /* sequence number */
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s[1] = ~NetCksum((uchar *)s, 8/2);
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/* size of the waiting packet */
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NetArpWaitTxPacketSize =
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(pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + 8;
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/* and do the ARP request */
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NetArpWaitTry = 1;
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NetArpWaitTimerStart = get_timer(0);
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ArpRequest();
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return 1; /* waiting */
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}
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static void ping_timeout(void)
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{
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eth_halt();
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NetState = NETLOOP_FAIL; /* we did not get the reply */
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}
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static void ping_handler(uchar *pkt, unsigned dest, IPaddr_t sip,
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unsigned src, unsigned len)
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{
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if (sip != NetPingIP)
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return;
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NetState = NETLOOP_SUCCESS;
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}
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void ping_start(void)
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{
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printf("Using %s device\n", eth_get_name());
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NetSetTimeout(10000UL, ping_timeout);
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NetSetHandler(ping_handler);
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ping_send();
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}
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void ping_receive(struct ethernet_hdr *et, struct ip_udp_hdr *ip, int len)
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{
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struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
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IPaddr_t src_ip;
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switch (icmph->type) {
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case ICMP_ECHO_REPLY:
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/*
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* IP header OK. Pass the packet to the
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* current handler.
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*/
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/* XXX point to ip packet */
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src_ip = NetReadIP((void *)&ip->ip_src);
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NetGetHandler()((uchar *)ip, 0, src_ip, 0, 0);
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return;
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case ICMP_ECHO_REQUEST:
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debug("Got ICMP ECHO REQUEST, return "
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"%d bytes\n", ETHER_HDR_SIZE + len);
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memcpy(&et->et_dest[0], &et->et_src[0], 6);
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memcpy(&et->et_src[0], NetOurEther, 6);
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ip->ip_sum = 0;
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ip->ip_off = 0;
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NetCopyIP((void *)&ip->ip_dst, &ip->ip_src);
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NetCopyIP((void *)&ip->ip_src, &NetOurIP);
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ip->ip_sum = ~NetCksum((uchar *)ip,
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IP_HDR_SIZE >> 1);
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icmph->type = ICMP_ECHO_REPLY;
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icmph->checksum = 0;
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icmph->checksum = ~NetCksum((uchar *)icmph,
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(len - IP_HDR_SIZE) >> 1);
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(void) eth_send((uchar *)et,
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ETHER_HDR_SIZE + len);
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return;
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/* default:
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return;*/
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}
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}
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