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authorJoe Hershberger <joe.hershberger@ni.com>2012-05-23 07:58:02 +0000
committerJoe Hershberger <joe.hershberger@ni.com>2012-05-23 14:19:23 -0500
commita36b12f95a29647a06b5459198684fc142482020 (patch)
tree6ad5427d06340b799b3e69d8f698e6fdbaaee7ef /net/ping.c
parentd280d3f430a4056e7baf66dc4be705dc8cc9bd37 (diff)
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talos-obmc-uboot-a36b12f95a29647a06b5459198684fc142482020.tar.gz
net: Move PING out of net.c
Separate this functionality out of the net.c behemoth Signed-off-by: Joe Hershberger <joe.hershberger@ni.com> Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'net/ping.c')
-rw-r--r--net/ping.c140
1 files changed, 140 insertions, 0 deletions
diff --git a/net/ping.c b/net/ping.c
new file mode 100644
index 0000000..0e5b1da
--- /dev/null
+++ b/net/ping.c
@@ -0,0 +1,140 @@
+/*
+ * Copied from Linux Monitor (LiMon) - Networking.
+ *
+ * Copyright 1994 - 2000 Neil Russell.
+ * (See License)
+ * Copyright 2000 Roland Borde
+ * Copyright 2000 Paolo Scaffardi
+ * Copyright 2000-2002 Wolfgang Denk, wd@denx.de
+ */
+
+#include "ping.h"
+#include "arp.h"
+
+static ushort PingSeqNo;
+
+/* The ip address to ping */
+IPaddr_t NetPingIP;
+
+static int ping_send(void)
+{
+ static uchar mac[6];
+ IP_t *ip;
+ ushort *s;
+ uchar *pkt;
+
+ /* XXX always send arp request */
+
+ memcpy(mac, NetEtherNullAddr, 6);
+
+ debug("sending ARP for %pI4\n", &NetPingIP);
+
+ NetArpWaitPacketIP = NetPingIP;
+ NetArpWaitPacketMAC = mac;
+
+ pkt = NetArpWaitTxPacket;
+ pkt += NetSetEther(pkt, mac, PROT_IP);
+
+ ip = (IP_t *)pkt;
+
+ /*
+ * Construct an IP and ICMP header.
+ * (need to set no fragment bit - XXX)
+ */
+ /* IP_HDR_SIZE / 4 (not including UDP) */
+ ip->ip_hl_v = 0x45;
+ ip->ip_tos = 0;
+ ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8);
+ ip->ip_id = htons(NetIPID++);
+ ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
+ ip->ip_ttl = 255;
+ ip->ip_p = 0x01; /* ICMP */
+ ip->ip_sum = 0;
+ /* already in network byte order */
+ NetCopyIP((void *)&ip->ip_src, &NetOurIP);
+ /* - "" - */
+ NetCopyIP((void *)&ip->ip_dst, &NetPingIP);
+ ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
+
+ s = &ip->udp_src; /* XXX ICMP starts here */
+ s[0] = htons(0x0800); /* echo-request, code */
+ s[1] = 0; /* checksum */
+ s[2] = 0; /* identifier */
+ s[3] = htons(PingSeqNo++); /* sequence number */
+ s[1] = ~NetCksum((uchar *)s, 8/2);
+
+ /* size of the waiting packet */
+ NetArpWaitTxPacketSize =
+ (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8;
+
+ /* and do the ARP request */
+ NetArpWaitTry = 1;
+ NetArpWaitTimerStart = get_timer(0);
+ ArpRequest();
+ return 1; /* waiting */
+}
+
+static void ping_timeout(void)
+{
+ eth_halt();
+ NetState = NETLOOP_FAIL; /* we did not get the reply */
+}
+
+static void ping_handler(uchar *pkt, unsigned dest, IPaddr_t sip,
+ unsigned src, unsigned len)
+{
+ if (sip != NetPingIP)
+ return;
+
+ NetState = NETLOOP_SUCCESS;
+}
+
+void ping_start(void)
+{
+ printf("Using %s device\n", eth_get_name());
+ NetSetTimeout(10000UL, ping_timeout);
+ NetSetHandler(ping_handler);
+
+ ping_send();
+}
+
+void ping_receive(Ethernet_t *et, IP_t *ip, int len)
+{
+ ICMP_t *icmph = (ICMP_t *)&(ip->udp_src);
+ IPaddr_t src_ip;
+
+ switch (icmph->type) {
+ case ICMP_ECHO_REPLY:
+ /*
+ * IP header OK. Pass the packet to the
+ * current handler.
+ */
+ /* XXX point to ip packet */
+ src_ip = NetReadIP((void *)&ip->ip_src);
+ NetGetHandler()((uchar *)ip, 0, src_ip, 0, 0);
+ return;
+ case ICMP_ECHO_REQUEST:
+ debug("Got ICMP ECHO REQUEST, return "
+ "%d bytes\n", ETHER_HDR_SIZE + len);
+
+ memcpy(&et->et_dest[0], &et->et_src[0], 6);
+ memcpy(&et->et_src[0], NetOurEther, 6);
+
+ ip->ip_sum = 0;
+ ip->ip_off = 0;
+ NetCopyIP((void *)&ip->ip_dst, &ip->ip_src);
+ NetCopyIP((void *)&ip->ip_src, &NetOurIP);
+ ip->ip_sum = ~NetCksum((uchar *)ip,
+ IP_HDR_SIZE_NO_UDP >> 1);
+
+ icmph->type = ICMP_ECHO_REPLY;
+ icmph->checksum = 0;
+ icmph->checksum = ~NetCksum((uchar *)icmph,
+ (len - IP_HDR_SIZE_NO_UDP) >> 1);
+ (void) eth_send((uchar *)et,
+ ETHER_HDR_SIZE + len);
+ return;
+/* default:
+ return;*/
+ }
+}
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