mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-20 00:48:52 +09:00
![Joe Hershberger](/assets/img/avatar_default.png)
Add several levels of DEBUG prints so that you can limit the noise to the severety of your problem. DEBUG_LL_STATE = Link local state machine changes DEBUG_DEV_PKT = Packets or info directed to the device DEBUG_NET_PKT = Packets on info on the network at large DEBUG_INT_STATE = Internal network state changes Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
116 lines
2.6 KiB
C
116 lines
2.6 KiB
C
/*
|
|
* 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 void set_icmp_header(uchar *pkt, IPaddr_t dest)
|
|
{
|
|
/*
|
|
* Construct an IP and ICMP header.
|
|
*/
|
|
struct ip_hdr *ip = (struct ip_hdr *)pkt;
|
|
struct icmp_hdr *icmp = (struct icmp_hdr *)(pkt + IP_HDR_SIZE);
|
|
|
|
net_set_ip_header(pkt, dest, NetOurIP);
|
|
|
|
ip->ip_len = htons(IP_ICMP_HDR_SIZE);
|
|
ip->ip_p = IPPROTO_ICMP;
|
|
ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE >> 1);
|
|
|
|
icmp->type = ICMP_ECHO_REQUEST;
|
|
icmp->code = 0;
|
|
icmp->checksum = 0;
|
|
icmp->un.echo.id = 0;
|
|
icmp->un.echo.sequence = htons(PingSeqNo++);
|
|
icmp->checksum = ~NetCksum((uchar *)icmp, ICMP_HDR_SIZE >> 1);
|
|
}
|
|
|
|
static int ping_send(void)
|
|
{
|
|
uchar *pkt;
|
|
int eth_hdr_size;
|
|
|
|
/* XXX always send arp request */
|
|
|
|
debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &NetPingIP);
|
|
|
|
NetArpWaitPacketIP = NetPingIP;
|
|
|
|
eth_hdr_size = NetSetEther(NetTxPacket, NetEtherNullAddr, PROT_IP);
|
|
pkt = (uchar *)NetTxPacket + eth_hdr_size;
|
|
|
|
set_icmp_header(pkt, NetPingIP);
|
|
|
|
/* size of the waiting packet */
|
|
NetArpWaitTxPacketSize = eth_hdr_size + IP_ICMP_HDR_SIZE;
|
|
|
|
/* and do the ARP request */
|
|
NetArpWaitTry = 1;
|
|
NetArpWaitTimerStart = get_timer(0);
|
|
ArpRequest();
|
|
return 1; /* waiting */
|
|
}
|
|
|
|
static void ping_timeout(void)
|
|
{
|
|
eth_halt();
|
|
net_set_state(NETLOOP_FAIL); /* we did not get the reply */
|
|
}
|
|
|
|
void ping_start(void)
|
|
{
|
|
printf("Using %s device\n", eth_get_name());
|
|
NetSetTimeout(10000UL, ping_timeout);
|
|
|
|
ping_send();
|
|
}
|
|
|
|
void ping_receive(struct ethernet_hdr *et, struct ip_udp_hdr *ip, int len)
|
|
{
|
|
struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
|
|
IPaddr_t src_ip;
|
|
int eth_hdr_size;
|
|
|
|
switch (icmph->type) {
|
|
case ICMP_ECHO_REPLY:
|
|
src_ip = NetReadIP((void *)&ip->ip_src);
|
|
if (src_ip == NetPingIP)
|
|
net_set_state(NETLOOP_SUCCESS);
|
|
return;
|
|
case ICMP_ECHO_REQUEST:
|
|
eth_hdr_size = net_update_ether(et, et->et_src, PROT_IP);
|
|
|
|
debug_cond(DEBUG_DEV_PKT, "Got ICMP ECHO REQUEST, return "
|
|
"%d bytes\n", eth_hdr_size + len);
|
|
|
|
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 >> 1);
|
|
|
|
icmph->type = ICMP_ECHO_REPLY;
|
|
icmph->checksum = 0;
|
|
icmph->checksum = ~NetCksum((uchar *)icmph,
|
|
(len - IP_HDR_SIZE) >> 1);
|
|
NetSendPacket((uchar *)et, eth_hdr_size + len);
|
|
return;
|
|
/* default:
|
|
return;*/
|
|
}
|
|
}
|