355 lines
9.4 KiB
C
355 lines
9.4 KiB
C
/*
|
|
* 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 1.36 96/07/23 14:17:24 leres Exp $ (LBL)";
|
|
#endif
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/time.h>
|
|
#include <sys/socket.h>
|
|
|
|
#if __STDC__
|
|
struct mbuf;
|
|
struct rtentry;
|
|
#endif
|
|
#include <net/if.h>
|
|
|
|
#include <netinet/in.h>
|
|
#include <net/ethernet.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 <string.h>
|
|
|
|
#include "interface.h"
|
|
#include "addrtoname.h"
|
|
#include "extract.h" /* must come after interface.h */
|
|
|
|
/* rfc1700 */
|
|
#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
|
|
|
|
/* rfc1716 */
|
|
#ifndef ICMP_UNREACH_FILTER_PROHIB
|
|
#define ICMP_UNREACH_FILTER_PROHIB 13 /* admin prohibited filter */
|
|
#endif
|
|
#ifndef ICMP_UNREACH_HOST_PRECEDENCE
|
|
#define ICMP_UNREACH_HOST_PRECEDENCE 14 /* host precedence violation */
|
|
#endif
|
|
#ifndef ICMP_UNREACH_PRECEDENCE_CUTOFF
|
|
#define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* precedence cutoff */
|
|
#endif
|
|
|
|
/* rfc1256 */
|
|
#ifndef ICMP_ROUTERADVERT
|
|
#define ICMP_ROUTERADVERT 9 /* router advertisement */
|
|
#endif
|
|
#ifndef ICMP_ROUTERSOLICIT
|
|
#define ICMP_ROUTERSOLICIT 10 /* router solicitation */
|
|
#endif
|
|
|
|
/* Most of the icmp types */
|
|
static struct tok icmp2str[] = {
|
|
{ ICMP_ECHOREPLY, "echo reply" },
|
|
{ ICMP_SOURCEQUENCH, "source quench" },
|
|
{ ICMP_ECHO, "echo request" },
|
|
{ ICMP_ROUTERSOLICIT, "router solicitation" },
|
|
{ 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_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" },
|
|
{ ICMP_UNREACH_FILTER_PROHIB,
|
|
"host %s unreachable - admin prohibited filter" },
|
|
{ ICMP_UNREACH_HOST_PRECEDENCE,
|
|
"host %s unreachable - host precedence violation" },
|
|
{ ICMP_UNREACH_PRECEDENCE_CUTOFF,
|
|
"host %s unreachable - precedence cutoff" },
|
|
{ 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 }
|
|
};
|
|
|
|
/* rfc1191 */
|
|
struct mtu_discovery {
|
|
short unused;
|
|
short nexthopmtu;
|
|
};
|
|
|
|
/* rfc1256 */
|
|
struct ih_rdiscovery {
|
|
u_char ird_addrnum;
|
|
u_char ird_addrsiz;
|
|
u_short ird_lifetime;
|
|
};
|
|
|
|
struct id_rdiscovery {
|
|
u_int32_t ird_addr;
|
|
u_int32_t ird_pref;
|
|
};
|
|
|
|
void
|
|
icmp_print(register const u_char *bp, register const u_char *bp2)
|
|
{
|
|
register char *cp;
|
|
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 u_int hlen, dport, mtu;
|
|
char buf[256];
|
|
|
|
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);
|
|
switch (dp->icmp_type) {
|
|
|
|
case ICMP_UNREACH:
|
|
TCHECK(dp->icmp_ip.ip_dst);
|
|
switch (dp->icmp_code) {
|
|
|
|
case ICMP_UNREACH_PROTOCOL:
|
|
TCHECK(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);
|
|
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;
|
|
|
|
case ICMP_UNREACH_NEEDFRAG:
|
|
{
|
|
register const struct mtu_discovery *mp;
|
|
|
|
mp = (struct mtu_discovery *)&dp->icmp_void;
|
|
mtu = EXTRACT_16BITS(&mp->nexthopmtu);
|
|
if (mtu)
|
|
(void)sprintf(buf,
|
|
"%s unreachable - need to frag (mtu %d)",
|
|
ipaddr_string(&dp->icmp_ip.ip_dst), mtu);
|
|
else
|
|
(void)sprintf(buf,
|
|
"%s unreachable - need to frag",
|
|
ipaddr_string(&dp->icmp_ip.ip_dst));
|
|
}
|
|
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);
|
|
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_ROUTERADVERT:
|
|
{
|
|
register const struct ih_rdiscovery *ihp;
|
|
register const struct id_rdiscovery *idp;
|
|
u_int lifetime, num, size;
|
|
|
|
(void)strcpy(buf, "router advertisement");
|
|
cp = buf + strlen(buf);
|
|
|
|
ihp = (struct ih_rdiscovery *)&dp->icmp_void;
|
|
TCHECK(*ihp);
|
|
(void)strcpy(cp, "lifetime ");
|
|
cp = buf + strlen(buf);
|
|
lifetime = EXTRACT_16BITS(&ihp->ird_lifetime);
|
|
if (lifetime < 60)
|
|
(void)sprintf(cp, "%u", lifetime);
|
|
else if (lifetime < 60 * 60)
|
|
(void)sprintf(cp, "%u:%02u",
|
|
lifetime / 60, lifetime % 60);
|
|
else
|
|
(void)sprintf(cp, "%u:%02u:%02u",
|
|
lifetime / 3600,
|
|
(lifetime % 3600) / 60,
|
|
lifetime % 60);
|
|
cp = buf + strlen(buf);
|
|
|
|
num = ihp->ird_addrnum;
|
|
(void)sprintf(cp, " %d:", num);
|
|
cp = buf + strlen(buf);
|
|
|
|
size = ihp->ird_addrsiz;
|
|
if (size != 2) {
|
|
(void)sprintf(cp, " [size %d]", size);
|
|
break;
|
|
}
|
|
idp = (struct id_rdiscovery *)&dp->icmp_data;
|
|
while (num-- > 0) {
|
|
TCHECK(*idp);
|
|
(void)sprintf(cp, " {%s %u}",
|
|
ipaddr_string(&idp->ird_addr),
|
|
EXTRACT_32BITS(&idp->ird_pref));
|
|
cp = buf + strlen(buf);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case ICMP_TIMXCEED:
|
|
TCHECK(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);
|
|
(void)sprintf(buf, "parameter problem - octet %d",
|
|
dp->icmp_pptr);
|
|
}
|
|
break;
|
|
|
|
case ICMP_MASKREPLY:
|
|
TCHECK(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);
|
|
}
|