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-rw-r--r--contrib/tcpdump/print-icmp.c354
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diff --git a/contrib/tcpdump/print-icmp.c b/contrib/tcpdump/print-icmp.c
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+/*
+ * 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 <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;
+};
+
+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);
+}
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