/* * 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 lintstatic const char rcsid[] =    "@(#) $Header: print-icmp.c,v 1.38 96/09/26 23:36:44 leres Exp $ (LBL)";#endif#ifndef WIN32
#include <sys/param.h>
#include <sys/time.h>
#include <sys/socket.h>
#else
#include <winsock.h>
#endif
#if __STDC__struct mbuf;struct rtentry;#endif#include <net/if.h>#ifndef WIN32
#include <netinet/in.h>#endif
#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 <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;};voidicmp_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);}