implement ping using new network stack
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer
parent
17f1f5b3b7
commit
98ff00b6d2
145
net/ping.c
145
net/ping.c
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@ -2,102 +2,103 @@
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#include <command.h>
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#include <clock.h>
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#include <net.h>
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#include <errno.h>
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#include <linux/err.h>
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static ushort PingSeqNo;
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static uint16_t ping_sequence_number;
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static IPaddr_t NetPingIP; /* the ip address to ping */
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static IPaddr_t net_ping_ip; /* the ip address to ping */
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static int PingSend(void)
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#define PING_STATE_INIT 0
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#define PING_STATE_SUCCESS 1
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static int ping_state;
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static struct net_connection *ping_con;
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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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IP_t *ip;
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ushort *s;
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uchar *pkt;
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unsigned char *payload;
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struct icmphdr *icmp;
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uint64_t ts;
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/* XXX always send arp request */
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icmp = ping_con->icmp;
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memcpy(mac, NetEtherNullAddr, 6);
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icmp->type = ICMP_ECHO_REQUEST;
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icmp->code = 0;
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icmp->checksum = 0;
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icmp->un.echo.id = 0;
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icmp->un.echo.sequence = htons(ping_sequence_number);
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pr_debug("sending ARP for %08lx\n", NetPingIP);
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ping_sequence_number++;
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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 = (IP_t *)pkt;
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/*
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* Construct an IP and ICMP header. (need to set no fragment bit - XXX)
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*/
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ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */
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ip->ip_tos = 0;
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ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8);
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ip->ip_id = htons(NetIPID++);
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ip->ip_off = htons(0x4000); /* No fragmentation */
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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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NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
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NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */
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ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 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 = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8;
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/* and do the ARP request */
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NetArpWaitTimerStart = get_time_ns();
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ArpRequest();
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return 1; /* waiting */
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payload = (char *)(icmp + 1);
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ts = get_time_ns();
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memcpy(payload, &ts, sizeof(ts));
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payload[8] = 0xab;
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payload[9] = 0xcd;
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return net_icmp_send(ping_con, 9);
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}
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static void
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PingTimeout (void)
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{
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NetState = NETLOOP_FAIL; /* we did not get the reply */
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}
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static void
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PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
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void ping_handler(char *pkt, unsigned len)
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{
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IPaddr_t tmp;
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IP_t *ip = (IP_t *)pkt;
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struct iphdr *ip = net_eth_to_iphdr(pkt);
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tmp = NetReadIP((void *)&ip->ip_src);
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if (tmp != NetPingIP)
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tmp = net_read_ip((void *)&ip->saddr);
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if (tmp != net_ping_ip)
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return;
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NetState = NETLOOP_SUCCESS;
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ping_state = PING_STATE_SUCCESS;
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}
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int do_ping(struct command *cmdtp, int argc, char *argv[])
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{
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if (argc < 2 || string_to_ip(argv[1], &NetPingIP))
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int ret;
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uint64_t ping_start = 0;
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if (argc < 2 || string_to_ip(argv[1], &net_ping_ip))
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return COMMAND_ERROR_USAGE;
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if (NetLoopInit(PING) < 0)
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return 1;
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NetSetTimeout (10 * SECOND, PingTimeout);
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NetSetHandler (PingHandler);
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PingSend();
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if (NetLoop() < 0) {
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printf("ping failed; host %s is not alive\n", argv[1]);
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return 1;
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ping_con = net_icmp_new(net_ping_ip, ping_handler);
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if (IS_ERR(ping_con)) {
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ret = PTR_ERR(ping_con);
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goto out;
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}
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printf("host %s is alive\n", argv[1]);
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ping_start = get_time_ns();
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ret = ping_send();
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if (ret)
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goto out_unreg;
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return 0;
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ping_state = PING_STATE_INIT;
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ping_sequence_number = 0;
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while (ping_state == PING_STATE_INIT) {
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if (ctrlc()) {
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ret = -EINTR;
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break;
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}
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net_poll();
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if (is_timeout(ping_start, 10 * SECOND)) {
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ping_start = get_time_ns();
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ret = ping_send();
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if (ret)
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goto out_unreg;
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}
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}
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if (!ret)
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printf("host %s is alive\n", argv[1]);
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out_unreg:
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net_unregister(ping_con);
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out:
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if (ret)
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printf("ping failed: %s\n", strerror(-ret));
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return ping_state == PING_STATE_SUCCESS ? 0 : 1;
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}
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BAREBOX_CMD_START(ping)
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