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/* $OpenBSD: print-icmp.c,v 1.4 1996/07/13 11:01:23 mickey Exp $ */
/*
* Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994, 1995, 1996
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
static char rcsid[] =
"@(#) Header: print-icmp.c,v 1.27 96/06/24 22:14:23 leres Exp (LBL)";
#endif
#include <sys/param.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#if __STDC__
struct mbuf;
struct rtentry;
#endif
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
#include <netinet/ip_var.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>
#include <netinet/tcp.h>
#include <netinet/tcpip.h>
#include <stdio.h>
#include "interface.h"
#include "addrtoname.h"
/* Compatibility */
#ifndef ICMP_UNREACH_NET_UNKNOWN
#define ICMP_UNREACH_NET_UNKNOWN 6 /* destination net unknown */
#endif
#ifndef ICMP_UNREACH_HOST_UNKNOWN
#define ICMP_UNREACH_HOST_UNKNOWN 7 /* destination host unknown */
#endif
#ifndef ICMP_UNREACH_ISOLATED
#define ICMP_UNREACH_ISOLATED 8 /* source host isolated */
#endif
#ifndef ICMP_UNREACH_NET_PROHIB
#define ICMP_UNREACH_NET_PROHIB 9 /* admin prohibited net */
#endif
#ifndef ICMP_UNREACH_HOST_PROHIB
#define ICMP_UNREACH_HOST_PROHIB 10 /* admin prohibited host */
#endif
#ifndef ICMP_UNREACH_TOSNET
#define ICMP_UNREACH_TOSNET 11 /* tos prohibited net */
#endif
#ifndef ICMP_UNREACH_TOSHOST
#define ICMP_UNREACH_TOSHOST 12 /* tos prohibited host */
#endif
/* Most of the icmp types */
static struct tok icmp2str[] = {
{ ICMP_ECHOREPLY, "echo reply" },
{ ICMP_SOURCEQUENCH, "source quench" },
{ ICMP_ECHO, "echo request" },
{ ICMP_TSTAMP, "time stamp request" },
{ ICMP_TSTAMPREPLY, "time stamp reply" },
{ ICMP_IREQ, "information request" },
{ ICMP_IREQREPLY, "information reply" },
{ ICMP_MASKREQ, "address mask request" },
{ 0, NULL }
};
/* Formats for most of the ICMP_UNREACH codes */
static struct tok unreach2str[] = {
{ ICMP_UNREACH_NET, "net %s unreachable" },
{ ICMP_UNREACH_HOST, "host %s unreachable" },
{ ICMP_UNREACH_NEEDFRAG, "%s unreachable - need to frag" },
{ ICMP_UNREACH_SRCFAIL,
"%s unreachable - source route failed" },
{ ICMP_UNREACH_NET_UNKNOWN, "net %s unreachable - unknown" },
{ ICMP_UNREACH_HOST_UNKNOWN, "host %s unreachable - unknown" },
{ ICMP_UNREACH_ISOLATED,
"%s unreachable - source host isolated" },
{ ICMP_UNREACH_NET_PROHIB,
"net %s unreachable - admin prohibited" },
{ ICMP_UNREACH_HOST_PROHIB,
"host %s unreachable - admin prohibited" },
{ ICMP_UNREACH_TOSNET,
"net %s unreachable - tos prohibited" },
{ ICMP_UNREACH_TOSHOST,
"host %s unreachable - tos prohibited" },
{ 0, NULL }
};
/* Formats for the ICMP_REDIRECT codes */
static struct tok type2str[] = {
{ ICMP_REDIRECT_NET, "redirect %s to net %s" },
{ ICMP_REDIRECT_HOST, "redirect %s to host %s" },
{ ICMP_REDIRECT_TOSNET, "redirect-tos %s to net %s" },
{ ICMP_REDIRECT_TOSHOST, "redirect-tos %s to net %s" },
{ 0, NULL }
};
void
icmp_print(register const u_char *bp, register const u_char *bp2)
{
register const struct icmp *dp;
register const struct ip *ip;
register const char *str, *fmt;
register const struct ip *oip;
register const struct udphdr *ouh;
register int hlen, dport;
char buf[256];
#define TCHECK(var, l) if ((u_char *)&(var) > snapend - l) goto trunc
dp = (struct icmp *)bp;
ip = (struct ip *)bp2;
str = buf;
(void)printf("%s > %s: ",
ipaddr_string(&ip->ip_src),
ipaddr_string(&ip->ip_dst));
TCHECK(dp->icmp_code, sizeof(dp->icmp_code));
switch (dp->icmp_type) {
case ICMP_UNREACH:
TCHECK(dp->icmp_ip.ip_dst, sizeof(dp->icmp_ip.ip_dst));
switch (dp->icmp_code) {
case ICMP_UNREACH_PROTOCOL:
TCHECK(dp->icmp_ip.ip_p, sizeof(dp->icmp_ip.ip_p));
(void)sprintf(buf, "%s protocol %d unreachable",
ipaddr_string(&dp->icmp_ip.ip_dst),
dp->icmp_ip.ip_p);
break;
case ICMP_UNREACH_PORT:
TCHECK(dp->icmp_ip.ip_p, sizeof(dp->icmp_ip.ip_p));
oip = &dp->icmp_ip;
hlen = oip->ip_hl * 4;
ouh = (struct udphdr *)(((u_char *)oip) + hlen);
dport = ntohs(ouh->uh_dport);
switch (oip->ip_p) {
case IPPROTO_TCP:
(void)sprintf(buf,
"%s tcp port %s unreachable",
ipaddr_string(&oip->ip_dst),
tcpport_string(dport));
break;
case IPPROTO_UDP:
(void)sprintf(buf,
"%s udp port %s unreachable",
ipaddr_string(&oip->ip_dst),
udpport_string(dport));
break;
default:
(void)sprintf(buf,
"%s protocol %d port %d unreachable",
ipaddr_string(&oip->ip_dst),
oip->ip_p, dport);
break;
}
break;
default:
fmt = tok2str(unreach2str, "#%d %%s unreachable",
dp->icmp_code);
(void)sprintf(buf, fmt,
ipaddr_string(&dp->icmp_ip.ip_dst));
break;
}
break;
case ICMP_REDIRECT:
TCHECK(dp->icmp_ip.ip_dst, sizeof(dp->icmp_ip.ip_dst));
fmt = tok2str(type2str, "redirect-#%d %%s to net %%s",
dp->icmp_code);
(void)sprintf(buf, fmt,
ipaddr_string(&dp->icmp_ip.ip_dst),
ipaddr_string(&dp->icmp_gwaddr));
break;
case ICMP_TIMXCEED:
TCHECK(dp->icmp_ip.ip_dst, sizeof(dp->icmp_ip.ip_dst));
switch (dp->icmp_code) {
case ICMP_TIMXCEED_INTRANS:
str = "time exceeded in-transit";
break;
case ICMP_TIMXCEED_REASS:
str = "ip reassembly time exceeded";
break;
default:
(void)sprintf(buf, "time exceeded-#%d", dp->icmp_code);
break;
}
break;
case ICMP_PARAMPROB:
if (dp->icmp_code)
(void)sprintf(buf, "parameter problem - code %d",
dp->icmp_code);
else {
TCHECK(dp->icmp_pptr, sizeof(dp->icmp_pptr));
(void)sprintf(buf, "parameter problem - octet %d",
dp->icmp_pptr);
}
break;
case ICMP_MASKREPLY:
TCHECK(dp->icmp_mask, sizeof(dp->icmp_mask));
(void)sprintf(buf, "address mask is 0x%08x",
(u_int32_t)ntohl(dp->icmp_mask));
break;
default:
str = tok2str(icmp2str, "type-#%d", dp->icmp_type);
break;
}
(void)printf("icmp: %s", str);
return;
trunc:
fputs("[|icmp]", stdout);
#undef TCHECK
}
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