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/* UDP packet tracing
* Copyright 1991 Phil Karn, KA9Q
*/
#include <stdio.h>
#include "listen.h"
#define RIP_PORT 520
#define UDPHDR 8
/* Dump a UDP header */
void udp_dump(unsigned char *data, int length, int hexdump)
{
int hdr_length;
int source;
int dest;
hdr_length = get16(data + 4);
source = get16(data + 0);
dest = get16(data + 2);
lprintf(T_PROTOCOL, "UDP:");
lprintf(T_TCPHDR, " len %d %s->", hdr_length,
servname(source, "udp"));
lprintf(T_TCPHDR, "%s", servname(dest, "udp"));
if (hdr_length > UDPHDR) {
length -= UDPHDR;
data += UDPHDR;
switch (dest) {
case RIP_PORT:
lprintf(T_TCPHDR, "\n");
rip_dump(data, length);
break;
default:
lprintf(T_TCPHDR, " Data %d\n", length);
data_dump(data, length, hexdump);
break;
}
}
}
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