2 * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994, 1995, 1996
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
23 static const char rcsid[] =
24 "@(#) $Header: /tcpdump/master/tcpdump/print-igmp.c,v 1.5 2001/09/17 21:58:02 fenner Exp $ (LBL)";
31 #include <sys/param.h>
32 #include <sys/socket.h>
34 #include <netinet/in.h>
35 #include <netinet/in_systm.h>
36 #include <netinet/ip.h>
41 #include "interface.h"
42 #include "addrtoname.h"
43 #include "extract.h" /* must come after interface.h */
46 #define IN_CLASSD(i) (((int32_t)(i) & 0xf0000000) == 0xe0000000)
49 /* (following from ipmulti/mrouted/prune.h) */
52 * The packet format for a traceroute request.
55 u_int tr_src; /* traceroute source */
56 u_int tr_dst; /* traceroute destination */
57 u_int tr_raddr; /* traceroute response address */
58 u_int tr_rttlqid; /* response ttl and qid */
61 #define TR_GETTTL(x) (int)(((x) >> 24) & 0xff)
62 #define TR_GETQID(x) ((x) & 0x00ffffff)
65 * Traceroute response format. A traceroute response has a tr_query at the
66 * beginning, followed by one tr_resp for each hop taken.
69 u_int tr_qarr; /* query arrival time */
70 u_int tr_inaddr; /* incoming interface address */
71 u_int tr_outaddr; /* outgoing interface address */
72 u_int tr_rmtaddr; /* parent address in source tree */
73 u_int tr_vifin; /* input packet count on interface */
74 u_int tr_vifout; /* output packet count on interface */
75 u_int tr_pktcnt; /* total incoming packets for src-grp */
76 u_char tr_rproto; /* routing proto deployed on router */
77 u_char tr_fttl; /* ttl required to forward on outvif */
78 u_char tr_smask; /* subnet mask for src addr */
79 u_char tr_rflags; /* forwarding error codes */
82 /* defs within mtrace */
86 /* fields for tr_rflags (forwarding error codes) */
94 #define TR_NO_SPACE 0x81
95 #define TR_OLD_ROUTER 0x82
97 /* fields for tr_rproto (routing protocol) */
98 #define TR_PROTO_DVMRP 1
99 #define TR_PROTO_MOSPF 2
100 #define TR_PROTO_PIM 3
101 #define TR_PROTO_CBT 4
103 /* igmpv3 report types */
104 static struct tok igmpv3report2str[] = {
115 print_mtrace(register const u_char *bp, register u_int len)
117 register const struct tr_query *tr = (const struct tr_query *)(bp + 8);
119 printf("mtrace %lu: %s to %s reply-to %s",
120 (u_long)TR_GETQID(ntohl(tr->tr_rttlqid)),
121 ipaddr_string(&tr->tr_src), ipaddr_string(&tr->tr_dst),
122 ipaddr_string(&tr->tr_raddr));
123 if (IN_CLASSD(ntohl(tr->tr_raddr)))
124 printf(" with-ttl %d", TR_GETTTL(ntohl(tr->tr_rttlqid)));
128 print_mresp(register const u_char *bp, register u_int len)
130 register const struct tr_query *tr = (const struct tr_query *)(bp + 8);
132 printf("mresp %lu: %s to %s reply-to %s",
133 (u_long)TR_GETQID(ntohl(tr->tr_rttlqid)),
134 ipaddr_string(&tr->tr_src), ipaddr_string(&tr->tr_dst),
135 ipaddr_string(&tr->tr_raddr));
136 if (IN_CLASSD(ntohl(tr->tr_raddr)))
137 printf(" with-ttl %d", TR_GETTTL(ntohl(tr->tr_rttlqid)));
141 print_igmpv3_report(register const u_char *bp, register u_int len)
143 u_int group, nsrcs, ngroups;
146 /* Minimum len is 16, and should be a multiple of 4 */
147 if (len < 16 || len & 0x03) {
148 (void)printf(" [invalid len %d]", len);
152 ngroups = EXTRACT_16BITS(&bp[6]);
153 (void)printf(", %d group record(s)", ngroups);
155 /* Print the group records */
157 for (i=0; i<ngroups; i++) {
159 (void)printf(" [invalid number of groups]");
162 TCHECK2(bp[group+4], 4);
163 (void)printf(" [gaddr %s", ipaddr_string(&bp[group+4]));
164 (void)printf(" %s", tok2str(igmpv3report2str, " [v3-report-#%d]",
166 nsrcs = EXTRACT_16BITS(&bp[group+2]);
167 /* Check the number of sources and print them */
168 if (len < group+8+(nsrcs<<2)) {
169 (void)printf(" [invalid number of sources %d]", nsrcs);
173 (void)printf(", %d source(s)", nsrcs);
175 /* Print the sources */
177 for (j=0; j<nsrcs; j++) {
178 TCHECK2(bp[group+8+(j<<2)], 4);
179 (void)printf(" %s", ipaddr_string(&bp[group+8+(j<<2)]));
183 /* Next group record */
184 group += 8 + (nsrcs << 2);
190 (void)printf("[|igmp]");
195 print_igmpv3_query(register const u_char *bp, register u_int len)
203 /* Minimum len is 12, and should be a multiple of 4 */
204 if (len < 12 || len & 0x03) {
205 (void)printf(" [invalid len %d]", len);
212 mrt = ((mrc & 0x0f) | 0x10) << (((mrc & 0x70) >> 4) + 3);
215 (void)printf(" [max resp time ");
220 if (EXTRACT_32BITS(&bp[4]) == 0)
222 (void)printf(" [gaddr %s", ipaddr_string(&bp[4]));
224 nsrcs = EXTRACT_16BITS(&bp[10]);
226 if (len < 12 + (nsrcs << 2))
227 (void)printf(" [invalid number of sources]");
228 else if (vflag > 1) {
230 for (i=0; i<nsrcs; i++) {
231 TCHECK2(bp[12+(i<<2)], 4);
232 (void)printf(" %s", ipaddr_string(&bp[12+(i<<2)]));
236 (void)printf(", %d source(s)", nsrcs);
241 (void)printf("[|igmp]");
246 igmp_print(register const u_char *bp, register u_int len)
249 (void)printf("igmp");
256 (void)printf("igmp query");
258 print_igmpv3_query(bp, len);
263 (void)printf(" [max resp time %d]", bp[1]);
266 if (EXTRACT_32BITS(&bp[4]))
267 (void)printf(" [gaddr %s]", ipaddr_string(&bp[4]));
269 (void)printf(" [len %d]", len);
273 (void)printf("igmp v1 report %s", ipaddr_string(&bp[4]));
275 (void)printf(" [len %d]", len);
278 (void)printf("igmp v2 report %s", ipaddr_string(&bp[4]));
281 (void)printf("igmp v3 report");
282 print_igmpv3_report(bp, len);
285 (void)printf("igmp leave %s", ipaddr_string(&bp[4]));
288 (void)printf("igmp dvmrp");
290 (void)printf(" [len %d]", len);
292 dvmrp_print(bp, len);
295 (void)printf("igmp pimv1");
296 pimv1_print(bp, len);
299 print_mresp(bp, len);
302 print_mtrace(bp, len);
305 (void)printf("igmp-%d", bp[0]);
309 if (vflag && TTEST2(bp[0], len)) {
310 /* Check the IGMP checksum */
311 if (in_cksum((const u_short*)bp, len, 0))
312 printf(" bad igmp cksum %x!", EXTRACT_16BITS(&bp[2]));
316 fputs("[|igmp]", stdout);