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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/tcpdump/print-icmp.c	Lines:	0	128	0.0 %
Date:	2017-11-07	Branches:	0	122	0.0 %


/*	$OpenBSD: print-icmp.c,v 1.25 2015/01/16 06:40:21 deraadt 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.
 */

#include <sys/time.h>
#include <sys/socket.h>

struct mbuf;
struct rtentry;
#include <net/if.h>

#include <netinet/in.h>
#include <netinet/if_ether.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 <stdio.h>
#include <string.h>
#include <limits.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

#define ICMP_INFOTYPE(type) \
    ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \
    (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \
    (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \
    (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \
    (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY)

/* 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(const u_char *bp, u_int length, const u_char *bp2)
{
	const struct icmp *dp;
	const struct ip *ip;
	const char *str, *fmt;
	const struct ip *oip;
	const struct udphdr *ouh;
	u_int hlen, dport, mtu;
	char buf[HOST_NAME_MAX+1+256];
	char buf2[HOST_NAME_MAX+1+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);
	if (qflag)
		(void) snprintf(buf, sizeof buf, "%u %u", dp->icmp_type,
		    dp->icmp_code);
	else switch (dp->icmp_type) {

	case ICMP_ECHOREPLY:
	case ICMP_ECHO:
		if (vflag) {
			TCHECK(dp->icmp_seq);
			(void)snprintf(buf, sizeof buf,
				       "echo %s (id:%04x seq:%u)",
				       (dp->icmp_type == ICMP_ECHO)?
				       "request": "reply",
				       ntohs(dp->icmp_id),
				       ntohs(dp->icmp_seq));
		} else
			str = tok2str(icmp2str, "type-#%u", dp->icmp_type);
		break;

	case ICMP_UNREACH:
		TCHECK(dp->icmp_ip.ip_dst);
		switch (dp->icmp_code) {

		case ICMP_UNREACH_PROTOCOL:
			TCHECK(dp->icmp_ip.ip_p);
			(void)snprintf(buf, sizeof buf,
				       "%s protocol %u 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);
			TCHECK(ouh->uh_dport);
			dport = ntohs(ouh->uh_dport);
			switch (oip->ip_p) {

			case IPPROTO_TCP:
				(void)snprintf(buf, sizeof buf,
					"%s tcp port %s unreachable",
					ipaddr_string(&oip->ip_dst),
					tcpport_string(dport));
				break;

			case IPPROTO_UDP:
				(void)snprintf(buf, sizeof buf,
					"%s udp port %s unreachable",
					ipaddr_string(&oip->ip_dst),
					udpport_string(dport));
				break;

			default:
				(void)snprintf(buf, sizeof buf,
					"%s protocol %u port %u unreachable",
					ipaddr_string(&oip->ip_dst),
					oip->ip_p, dport);
				break;
			}
			break;

		case ICMP_UNREACH_NEEDFRAG:
			{
			const struct mtu_discovery *mp;

			mp = (struct mtu_discovery *)&dp->icmp_void;
                        mtu = EXTRACT_16BITS(&mp->nexthopmtu);
                        if (mtu)
			    (void)snprintf(buf, sizeof buf,
				"%s unreachable - need to frag (mtu %u)",
				ipaddr_string(&dp->icmp_ip.ip_dst), mtu);
                        else
			    (void)snprintf(buf, sizeof buf,
				"%s unreachable - need to frag",
				ipaddr_string(&dp->icmp_ip.ip_dst));
			}
			break;

		default:
			fmt = tok2str(unreach2str, "#%u %%s unreachable",
			    dp->icmp_code);
			(void)snprintf(buf, sizeof buf, fmt,
			    ipaddr_string(&dp->icmp_ip.ip_dst));
			break;
		}
		break;

	case ICMP_REDIRECT:
		TCHECK(dp->icmp_ip.ip_dst);
		fmt = tok2str(type2str, "redirect-#%u %%s to net %%s",
		    dp->icmp_code);
		(void)snprintf(buf, sizeof buf, fmt,
		    ipaddr_string(&dp->icmp_ip.ip_dst),
		    ipaddr_string(&dp->icmp_gwaddr));
		break;

	case ICMP_ROUTERADVERT:
		{
		const struct ih_rdiscovery *ihp;
		const struct id_rdiscovery *idp;
		u_int lifetime, num, size;

		(void)strlcpy(buf, "router advertisement", sizeof(buf));

		ihp = (struct ih_rdiscovery *)&dp->icmp_void;
		TCHECK(*ihp);
		(void)strlcat(buf, " lifetime ", sizeof(buf));
		lifetime = EXTRACT_16BITS(&ihp->ird_lifetime);
		if (lifetime < 60)
			(void)snprintf(buf2, sizeof(buf2), "%u", lifetime);
		else if (lifetime < 60 * 60)
			(void)snprintf(buf2, sizeof(buf2), "%u:%02u",
			    lifetime / 60, lifetime % 60);
		else
			(void)snprintf(buf2, sizeof(buf2), "%u:%02u:%02u",
			    lifetime / 3600, (lifetime % 3600) / 60,
			    lifetime % 60);
		strlcat(buf, buf2, sizeof(buf));

		num = ihp->ird_addrnum;
		(void)snprintf(buf2, sizeof(buf2), " %u:", num);
		strlcat(buf, buf2, sizeof(buf));

		size = ihp->ird_addrsiz;
		if (size != 2) {
			(void)snprintf(buf2, sizeof(buf2), " [size %u]", size);
			strlcat(buf, buf2, sizeof(buf));
			break;
		}
		idp = (struct id_rdiscovery *)&dp->icmp_data;
		while (num-- > 0) {
			TCHECK(*idp);
			(void)snprintf(buf2, sizeof(buf2), " {%s %u}",
			    ipaddr_string(&idp->ird_addr),
			    EXTRACT_32BITS(&idp->ird_pref));
			strlcat(buf, buf2, sizeof(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)snprintf(buf, sizeof buf,
				"time exceeded-#%u", dp->icmp_code);
			break;
		}
		break;

	case ICMP_PARAMPROB:
		switch (dp->icmp_code) {
		case ICMP_PARAMPROB_OPTABSENT:
			str = "requested option absent";
			break;
		case ICMP_PARAMPROB_LENGTH:
			snprintf(buf, sizeof buf, "bad length %u", dp->icmp_pptr);
			break;
		default:
			TCHECK(dp->icmp_pptr);
			(void)snprintf(buf, sizeof buf,
				"parameter problem - octet %u",
				dp->icmp_pptr);
			break;
		}
		break;

	case ICMP_MASKREPLY:
		TCHECK(dp->icmp_mask);
		(void)snprintf(buf, sizeof buf, "address mask is 0x%08x",
		    (u_int32_t)ntohl(dp->icmp_mask));
		break;

	default:
		str = tok2str(icmp2str, "type-#%u", dp->icmp_type);
		break;
	}
	(void)printf("icmp: %s", str);
	if (vflag) {
		if (TTEST2(dp->icmp_type, length)) {
			u_int16_t sum, icmp_sum;
			sum = in_cksum((const u_short *)dp, length, 0);
			if (sum != 0) {
				icmp_sum = EXTRACT_16BITS(&dp->icmp_cksum);
				(void)printf(" [bad icmp cksum %x! -> %x]", icmp_sum,
				    in_cksum_shouldbe(icmp_sum, sum));
			}
			else
				(void)printf(" [icmp cksum ok]");
		}
	}
	if (vflag > 1 && !ICMP_INFOTYPE(dp->icmp_type) &&
	    TTEST(dp->icmp_ip)) {
		(void)printf(" for ");
		oip = &dp->icmp_ip;
		ip_print((u_char *)oip, ntohs(oip->ip_len));
	}
	return;
trunc:
	fputs("[|icmp]", stdout);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: print-icmp.c,v 1.25 2015/01/16 06:40:21 deraadt Exp $ */
2
3			/*
4			* Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994, 1995, 1996
5			* The Regents of the University of California. All rights reserved.
6			*
7			* Redistribution and use in source and binary forms, with or without
8			* modification, are permitted provided that: (1) source code distributions
9			* retain the above copyright notice and this paragraph in its entirety, (2)
10			* distributions including binary code include the above copyright notice and
11			* this paragraph in its entirety in the documentation or other materials
12			* provided with the distribution, and (3) all advertising materials mentioning
13			* features or use of this software display the following acknowledgement:
14			* ``This product includes software developed by the University of California,
15			* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
16			* the University nor the names of its contributors may be used to endorse
17			* or promote products derived from this software without specific prior
18			* written permission.
19			* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
20			* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
21			* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
22			*/
23
24			#include <sys/time.h>
25			#include <sys/socket.h>
26
27			struct mbuf;
28			struct rtentry;
29			#include <net/if.h>
30
31			#include <netinet/in.h>
32			#include <netinet/if_ether.h>
33			#include <netinet/ip.h>
34			#include <netinet/ip_icmp.h>
35			#include <netinet/ip_var.h>
36			#include <netinet/udp.h>
37			#include <netinet/udp_var.h>
38			#include <netinet/tcp.h>
39
40			#include <stdio.h>
41			#include <string.h>
42			#include <limits.h>
43
44			#include "interface.h"
45			#include "addrtoname.h"
46			#include "extract.h" /* must come after interface.h */
47
48			/* rfc1700 */
49			#ifndef ICMP_UNREACH_NET_UNKNOWN
50			#define ICMP_UNREACH_NET_UNKNOWN 6 /* destination net unknown */
51			#endif
52			#ifndef ICMP_UNREACH_HOST_UNKNOWN
53			#define ICMP_UNREACH_HOST_UNKNOWN 7 /* destination host unknown */
54			#endif
55			#ifndef ICMP_UNREACH_ISOLATED
56			#define ICMP_UNREACH_ISOLATED 8 /* source host isolated */
57			#endif
58			#ifndef ICMP_UNREACH_NET_PROHIB
59			#define ICMP_UNREACH_NET_PROHIB 9 /* admin prohibited net */
60			#endif
61			#ifndef ICMP_UNREACH_HOST_PROHIB
62			#define ICMP_UNREACH_HOST_PROHIB 10 /* admin prohibited host */
63			#endif
64			#ifndef ICMP_UNREACH_TOSNET
65			#define ICMP_UNREACH_TOSNET 11 /* tos prohibited net */
66			#endif
67			#ifndef ICMP_UNREACH_TOSHOST
68			#define ICMP_UNREACH_TOSHOST 12 /* tos prohibited host */
69			#endif
70
71			/* rfc1716 */
72			#ifndef ICMP_UNREACH_FILTER_PROHIB
73			#define ICMP_UNREACH_FILTER_PROHIB 13 /* admin prohibited filter */
74			#endif
75			#ifndef ICMP_UNREACH_HOST_PRECEDENCE
76			#define ICMP_UNREACH_HOST_PRECEDENCE 14 /* host precedence violation */
77			#endif
78			#ifndef ICMP_UNREACH_PRECEDENCE_CUTOFF
79			#define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* precedence cutoff */
80			#endif
81
82			/* rfc1256 */
83			#ifndef ICMP_ROUTERADVERT
84			#define ICMP_ROUTERADVERT 9 /* router advertisement */
85			#endif
86			#ifndef ICMP_ROUTERSOLICIT
87			#define ICMP_ROUTERSOLICIT 10 /* router solicitation */
88			#endif
89
90			#define ICMP_INFOTYPE(type) \
91			((type) == ICMP_ECHOREPLY \|\| (type) == ICMP_ECHO \|\| \
92			(type) == ICMP_ROUTERADVERT \|\| (type) == ICMP_ROUTERSOLICIT \|\| \
93			(type) == ICMP_TSTAMP \|\| (type) == ICMP_TSTAMPREPLY \|\| \
94			(type) == ICMP_IREQ \|\| (type) == ICMP_IREQREPLY \|\| \
95			(type) == ICMP_MASKREQ \|\| (type) == ICMP_MASKREPLY)
96
97			/* Most of the icmp types */
98			static struct tok icmp2str[] = {
99			{ ICMP_ECHOREPLY, "echo reply" },
100			{ ICMP_SOURCEQUENCH, "source quench" },
101			{ ICMP_ECHO, "echo request" },
102			{ ICMP_ROUTERSOLICIT, "router solicitation" },
103			{ ICMP_TSTAMP, "time stamp request" },
104			{ ICMP_TSTAMPREPLY, "time stamp reply" },
105			{ ICMP_IREQ, "information request" },
106			{ ICMP_IREQREPLY, "information reply" },
107			{ ICMP_MASKREQ, "address mask request" },
108			{ 0, NULL }
109			};
110
111			/* Formats for most of the ICMP_UNREACH codes */
112			static struct tok unreach2str[] = {
113			{ ICMP_UNREACH_NET, "net %s unreachable" },
114			{ ICMP_UNREACH_HOST, "host %s unreachable" },
115			{ ICMP_UNREACH_SRCFAIL,
116			"%s unreachable - source route failed" },
117			{ ICMP_UNREACH_NET_UNKNOWN, "net %s unreachable - unknown" },
118			{ ICMP_UNREACH_HOST_UNKNOWN, "host %s unreachable - unknown" },
119			{ ICMP_UNREACH_ISOLATED,
120			"%s unreachable - source host isolated" },
121			{ ICMP_UNREACH_NET_PROHIB,
122			"net %s unreachable - admin prohibited" },
123			{ ICMP_UNREACH_HOST_PROHIB,
124			"host %s unreachable - admin prohibited" },
125			{ ICMP_UNREACH_TOSNET,
126			"net %s unreachable - tos prohibited" },
127			{ ICMP_UNREACH_TOSHOST,
128			"host %s unreachable - tos prohibited" },
129			{ ICMP_UNREACH_FILTER_PROHIB,
130			"host %s unreachable - admin prohibited filter" },
131			{ ICMP_UNREACH_HOST_PRECEDENCE,
132			"host %s unreachable - host precedence violation" },
133			{ ICMP_UNREACH_PRECEDENCE_CUTOFF,
134			"host %s unreachable - precedence cutoff" },
135			{ 0, NULL }
136			};
137
138			/* Formats for the ICMP_REDIRECT codes */
139			static struct tok type2str[] = {
140			{ ICMP_REDIRECT_NET, "redirect %s to net %s" },
141			{ ICMP_REDIRECT_HOST, "redirect %s to host %s" },
142			{ ICMP_REDIRECT_TOSNET, "redirect-tos %s to net %s" },
143			{ ICMP_REDIRECT_TOSHOST, "redirect-tos %s to net %s" },
144			{ 0, NULL }
145			};
146
147			/* rfc1191 */
148			struct mtu_discovery {
149			short unused;
150			short nexthopmtu;
151			};
152
153			/* rfc1256 */
154			struct ih_rdiscovery {
155			u_char ird_addrnum;
156			u_char ird_addrsiz;
157			u_short ird_lifetime;
158			};
159
160			struct id_rdiscovery {
161			u_int32_t ird_addr;
162			u_int32_t ird_pref;
163			};
164
165			void
166			icmp_print(const u_char bp, u_int length, const u_char bp2)
167			{
168			const struct icmp *dp;
169			const struct ip *ip;
170			const char str, fmt;
171			const struct ip *oip;
172			const struct udphdr *ouh;
173			u_int hlen, dport, mtu;
174			char buf[HOST_NAME_MAX+1+256];
175			char buf2[HOST_NAME_MAX+1+256];
176
177			dp = (struct icmp *)bp;
178			ip = (struct ip *)bp2;
179			str = buf;
180
181			(void)printf("%s > %s: ",
182			ipaddr_string(&ip->ip_src),
183			ipaddr_string(&ip->ip_dst));
184
185			TCHECK(dp->icmp_code);
186			if (qflag)
187			(void) snprintf(buf, sizeof buf, "%u %u", dp->icmp_type,
188			dp->icmp_code);
189			else switch (dp->icmp_type) {
190
191			case ICMP_ECHOREPLY:
192			case ICMP_ECHO:
193			if (vflag) {
194			TCHECK(dp->icmp_seq);
195			(void)snprintf(buf, sizeof buf,
196			"echo %s (id:%04x seq:%u)",
197			(dp->icmp_type == ICMP_ECHO)?
198			"request": "reply",
199			ntohs(dp->icmp_id),
200			ntohs(dp->icmp_seq));
201			} else
202			str = tok2str(icmp2str, "type-#%u", dp->icmp_type);
203			break;
204
205			case ICMP_UNREACH:
206			TCHECK(dp->icmp_ip.ip_dst);
207			switch (dp->icmp_code) {
208
209			case ICMP_UNREACH_PROTOCOL:
210			TCHECK(dp->icmp_ip.ip_p);
211			(void)snprintf(buf, sizeof buf,
212			"%s protocol %u unreachable",
213			ipaddr_string(&dp->icmp_ip.ip_dst),
214			dp->icmp_ip.ip_p);
215			break;
216
217			case ICMP_UNREACH_PORT:
218			TCHECK(dp->icmp_ip.ip_p);
219			oip = &dp->icmp_ip;
220			hlen = oip->ip_hl * 4;
221			ouh = (struct udphdr )(((u_char )oip) + hlen);
222			TCHECK(ouh->uh_dport);
223			dport = ntohs(ouh->uh_dport);
224			switch (oip->ip_p) {
225
226			case IPPROTO_TCP:
227			(void)snprintf(buf, sizeof buf,
228			"%s tcp port %s unreachable",
229			ipaddr_string(&oip->ip_dst),
230			tcpport_string(dport));
231			break;
232
233			case IPPROTO_UDP:
234			(void)snprintf(buf, sizeof buf,
235			"%s udp port %s unreachable",
236			ipaddr_string(&oip->ip_dst),
237			udpport_string(dport));
238			break;
239
240			default:
241			(void)snprintf(buf, sizeof buf,
242			"%s protocol %u port %u unreachable",
243			ipaddr_string(&oip->ip_dst),
244			oip->ip_p, dport);
245			break;
246			}
247			break;
248
249			case ICMP_UNREACH_NEEDFRAG:
250			{
251			const struct mtu_discovery *mp;
252
253			mp = (struct mtu_discovery *)&dp->icmp_void;
254			mtu = EXTRACT_16BITS(&mp->nexthopmtu);
255			if (mtu)
256			(void)snprintf(buf, sizeof buf,
257			"%s unreachable - need to frag (mtu %u)",
258			ipaddr_string(&dp->icmp_ip.ip_dst), mtu);
259			else
260			(void)snprintf(buf, sizeof buf,
261			"%s unreachable - need to frag",
262			ipaddr_string(&dp->icmp_ip.ip_dst));
263			}
264			break;
265
266			default:
267			fmt = tok2str(unreach2str, "#%u %%s unreachable",
268			dp->icmp_code);
269			(void)snprintf(buf, sizeof buf, fmt,
270			ipaddr_string(&dp->icmp_ip.ip_dst));
271			break;
272			}
273			break;
274
275			case ICMP_REDIRECT:
276			TCHECK(dp->icmp_ip.ip_dst);
277			fmt = tok2str(type2str, "redirect-#%u %%s to net %%s",
278			dp->icmp_code);
279			(void)snprintf(buf, sizeof buf, fmt,
280			ipaddr_string(&dp->icmp_ip.ip_dst),
281			ipaddr_string(&dp->icmp_gwaddr));
282			break;
283
284			case ICMP_ROUTERADVERT:
285			{
286			const struct ih_rdiscovery *ihp;
287			const struct id_rdiscovery *idp;
288			u_int lifetime, num, size;
289
290			(void)strlcpy(buf, "router advertisement", sizeof(buf));
291
292			ihp = (struct ih_rdiscovery *)&dp->icmp_void;
293			TCHECK(*ihp);
294			(void)strlcat(buf, " lifetime ", sizeof(buf));
295			lifetime = EXTRACT_16BITS(&ihp->ird_lifetime);
296			if (lifetime < 60)
297			(void)snprintf(buf2, sizeof(buf2), "%u", lifetime);
298			else if (lifetime < 60 * 60)
299			(void)snprintf(buf2, sizeof(buf2), "%u:%02u",
300			lifetime / 60, lifetime % 60);
301			else
302			(void)snprintf(buf2, sizeof(buf2), "%u:%02u:%02u",
303			lifetime / 3600, (lifetime % 3600) / 60,
304			lifetime % 60);
305			strlcat(buf, buf2, sizeof(buf));
306
307			num = ihp->ird_addrnum;
308			(void)snprintf(buf2, sizeof(buf2), " %u:", num);
309			strlcat(buf, buf2, sizeof(buf));
310
311			size = ihp->ird_addrsiz;
312			if (size != 2) {
313			(void)snprintf(buf2, sizeof(buf2), " [size %u]", size);
314			strlcat(buf, buf2, sizeof(buf));
315			break;
316			}
317			idp = (struct id_rdiscovery *)&dp->icmp_data;
318			while (num-- > 0) {
319			TCHECK(*idp);
320			(void)snprintf(buf2, sizeof(buf2), " {%s %u}",
321			ipaddr_string(&idp->ird_addr),
322			EXTRACT_32BITS(&idp->ird_pref));
323			strlcat(buf, buf2, sizeof(buf));
324			}
325			}
326			break;
327
328			case ICMP_TIMXCEED:
329			TCHECK(dp->icmp_ip.ip_dst);
330			switch (dp->icmp_code) {
331
332			case ICMP_TIMXCEED_INTRANS:
333			str = "time exceeded in-transit";
334			break;
335
336			case ICMP_TIMXCEED_REASS:
337			str = "ip reassembly time exceeded";
338			break;
339
340			default:
341			(void)snprintf(buf, sizeof buf,
342			"time exceeded-#%u", dp->icmp_code);
343			break;
344			}
345			break;
346
347			case ICMP_PARAMPROB:
348			switch (dp->icmp_code) {
349			case ICMP_PARAMPROB_OPTABSENT:
350			str = "requested option absent";
351			break;
352			case ICMP_PARAMPROB_LENGTH:
353			snprintf(buf, sizeof buf, "bad length %u", dp->icmp_pptr);
354			break;
355			default:
356			TCHECK(dp->icmp_pptr);
357			(void)snprintf(buf, sizeof buf,
358			"parameter problem - octet %u",
359			dp->icmp_pptr);
360			break;
361			}
362			break;
363
364			case ICMP_MASKREPLY:
365			TCHECK(dp->icmp_mask);
366			(void)snprintf(buf, sizeof buf, "address mask is 0x%08x",
367			(u_int32_t)ntohl(dp->icmp_mask));
368			break;
369
370			default:
371			str = tok2str(icmp2str, "type-#%u", dp->icmp_type);
372			break;
373			}
374			(void)printf("icmp: %s", str);
375			if (vflag) {
376			if (TTEST2(dp->icmp_type, length)) {
377			u_int16_t sum, icmp_sum;
378			sum = in_cksum((const u_short *)dp, length, 0);
379			if (sum != 0) {
380			icmp_sum = EXTRACT_16BITS(&dp->icmp_cksum);
381			(void)printf(" [bad icmp cksum %x! -> %x]", icmp_sum,
382			in_cksum_shouldbe(icmp_sum, sum));
383			}
384			else
385			(void)printf(" [icmp cksum ok]");
386			}
387			}
388			if (vflag > 1 && !ICMP_INFOTYPE(dp->icmp_type) &&
389			TTEST(dp->icmp_ip)) {
390			(void)printf(" for ");
391			oip = &dp->icmp_ip;
392			ip_print((u_char *)oip, ntohs(oip->ip_len));
393			}
394			return;
395			trunc:
396			fputs("[\|icmp]", stdout);
397			}