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>master
Joe Hershberger
12 years ago
parent
d280d3f430
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a36b12f95a
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/*
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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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IP_t *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 = (IP_t *)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_NO_UDP + 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_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 = |
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(pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 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(Ethernet_t *et, IP_t *ip, int len) |
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{ |
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ICMP_t *icmph = (ICMP_t *)&(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_NO_UDP >> 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_NO_UDP) >> 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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@ -0,0 +1,34 @@ |
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/*
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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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#if defined(CONFIG_CMD_PING) |
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#ifndef __PING_H__ |
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#define __PING_H__ |
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#include <common.h> |
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#include <net.h> |
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/*
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* Initialize ping (beginning of netloop) |
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*/ |
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void ping_start(void); |
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/*
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* Deal with the receipt of a ping packet |
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* |
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* @param et Ethernet header in packet |
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* @param ip IP header in the same packet |
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* @param len Packet length |
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*/ |
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void ping_receive(Ethernet_t *et, IP_t *ip, int len); |
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#endif /* __PING_H__ */ |
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#endif |
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