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/****************************************************************************
** File: icmp.c
**
** Author: Mike Borella
**
** Comments: Dump ICMP information
**
*****************************************************************************/
#include <stdio.h>
#include <sys/types.h>
#include <netinet/in.h>
#include "config.h"
#include "icmp.h"
extern u_char *packet_end;
/*----------------------------------------------------------------------------
**
** dump_icmp()
**
** Parse ICMP header and dump fields
**
**----------------------------------------------------------------------------
*/
void dump_icmp(u_char *bp)
{
ICMPhdr *icmph;
echoext *echo;
icmph = (ICMPhdr *) bp;
printf("----------------------------------------------------------\n");
printf(" ICMP Header\n");
printf("----------------------------------------------------------\n");
printf("Type: %d ", icmph->type);
switch (icmph->type)
{
case 0:
printf("(echo reply)\n");
printf("Code %d\n", icmph->code);
echo = (echoext *) (bp + sizeof(ICMPhdr));
printf("Identifier %d\n", echo->id);
printf("Sequence number %d\n", echo->seqno);
break;
case 3:
printf("(dest unreachable)\n");
printf("Code: %d ", icmph->code);
switch (icmph->code)
{
case 0:
printf("(network)\n");
break;
case 1:
printf("(host)\n");
break;
case 2:
printf("(protocol)\n");
break;
case 3:
printf("(port)\n");
break;
case 4:
printf("(fragment needed)\n");
break;
case 5:
printf("(source route failed)\n");
break;
case 6:
printf("(network unknown)\n");
break;
case 7:
printf("(host unknown)\n");
break;
case 9:
printf("(network prohibited)\n");
break;
case 10:
printf("(host prohibited)\n");
break;
case 11:
printf("(network unreachable for TOS)\n");
break;
case 12:
printf("(host unreachable for TOS)\n");
break;
case 13:
printf("(communication filtered)\n");
break;
case 14:
printf("(host precedence violation)\n");
break;
case 15:
printf("(precedence cutoff)\n");
break;
default:
printf("(unknown code)\n");
break;
} /* code */
break;
case 4:
printf("(source quench)\n");
printf("Code: %d ", icmph->code);
break;
case 5:
printf("(redirect)\n");
printf("Code: %d ", icmph->code);
switch(icmph->code)
{
case 0:
printf("(network)\n");
break;
case 1:
printf("(host)\n");
break;
case 2:
printf("(TOS and network)\n");
break;
case 3:
printf("(TOS and host)\n");
break;
}
break;
case 8:
printf("(echo request)\n");
printf("Code %d\n", icmph->code);
echo = (echoext *) (bp + sizeof(ICMPhdr));
printf("Identifier %d\n", echo->id);
printf("Sequence number %d\n", echo->seqno);
break;
case 9:
printf("(router advertisement)\n");
printf("Code: %d ", icmph->code);
break;
case 10:
printf("(router solicitation)\n");
printf("Code: %d ", icmph->code);
break;
case 11:
printf("(time exceeded)\n");
printf("Code: %d ", icmph->code);
break;
case 12:
printf("(parameter error)\n");
printf("Code: %d ", icmph->code);
break;
case 13:
printf("(timestamp request)\n");
printf("Code: %d ", icmph->code);
break;
case 14:
printf("(timestamp reply)\n");
printf("Code: %d ", icmph->code);
break;
case 17:
printf("(address mask request)\n");
printf("Code: %d ", icmph->code);
break;
case 18:
printf("(address mask reply)\n");
printf("Code: %d ", icmph->code);
break;
default:
printf("(unknown type)\n");
printf("Code: %d ", icmph->code);
break;
}
printf("Checksum: %d\n", ntohs(icmph->csum));
return;
}
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