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[] _U_ =
24 "@(#) $Header: /tcpdump/master/tcpdump/print-igmp.c,v 1.15 2004/03/24 00:59:16 guy Exp $ (LBL)";
33 #include <tcpdump-stdinc.h>
38 #include "interface.h"
39 #include "addrtoname.h"
40 #include "extract.h" /* must come after interface.h */
43 #define IN_CLASSD(i) (((int32_t)(i) & 0xf0000000) == 0xe0000000)
46 /* (following from ipmulti/mrouted/prune.h) */
49 * The packet format for a traceroute request.
52 u_int32_t tr_src; /* traceroute source */
53 u_int32_t tr_dst; /* traceroute destination */
54 u_int32_t tr_raddr; /* traceroute response address */
55 u_int32_t tr_rttlqid; /* response ttl and qid */
58 #define TR_GETTTL(x) (int)(((x) >> 24) & 0xff)
59 #define TR_GETQID(x) ((x) & 0x00ffffff)
62 * Traceroute response format. A traceroute response has a tr_query at the
63 * beginning, followed by one tr_resp for each hop taken.
66 u_int32_t tr_qarr; /* query arrival time */
67 u_int32_t tr_inaddr; /* incoming interface address */
68 u_int32_t tr_outaddr; /* outgoing interface address */
69 u_int32_t tr_rmtaddr; /* parent address in source tree */
70 u_int32_t tr_vifin; /* input packet count on interface */
71 u_int32_t tr_vifout; /* output packet count on interface */
72 u_int32_t tr_pktcnt; /* total incoming packets for src-grp */
73 u_int8_t tr_rproto; /* routing proto deployed on router */
74 u_int8_t tr_fttl; /* ttl required to forward on outvif */
75 u_int8_t tr_smask; /* subnet mask for src addr */
76 u_int8_t tr_rflags; /* forwarding error codes */
79 /* defs within mtrace */
83 /* fields for tr_rflags (forwarding error codes) */
91 #define TR_NO_SPACE 0x81
92 #define TR_OLD_ROUTER 0x82
94 /* fields for tr_rproto (routing protocol) */
95 #define TR_PROTO_DVMRP 1
96 #define TR_PROTO_MOSPF 2
97 #define TR_PROTO_PIM 3
98 #define TR_PROTO_CBT 4
100 /* igmpv3 report types */
101 static struct tok igmpv3report2str[] = {
112 print_mtrace(register const u_char *bp, register u_int len)
114 register const struct tr_query *tr = (const struct tr_query *)(bp + 8);
117 if (len < 8 + sizeof (struct tr_query)) {
118 (void)printf(" [invalid len %d]", len);
121 printf("mtrace %u: %s to %s reply-to %s",
122 TR_GETQID(EXTRACT_32BITS(&tr->tr_rttlqid)),
123 ipaddr_string(&tr->tr_src), ipaddr_string(&tr->tr_dst),
124 ipaddr_string(&tr->tr_raddr));
125 if (IN_CLASSD(EXTRACT_32BITS(&tr->tr_raddr)))
126 printf(" with-ttl %d", TR_GETTTL(EXTRACT_32BITS(&tr->tr_rttlqid)));
129 (void)printf("[|igmp]");
134 print_mresp(register const u_char *bp, register u_int len)
136 register const struct tr_query *tr = (const struct tr_query *)(bp + 8);
139 if (len < 8 + sizeof (struct tr_query)) {
140 (void)printf(" [invalid len %d]", len);
143 printf("mresp %lu: %s to %s reply-to %s",
144 (u_long)TR_GETQID(EXTRACT_32BITS(&tr->tr_rttlqid)),
145 ipaddr_string(&tr->tr_src), ipaddr_string(&tr->tr_dst),
146 ipaddr_string(&tr->tr_raddr));
147 if (IN_CLASSD(EXTRACT_32BITS(&tr->tr_raddr)))
148 printf(" with-ttl %d", TR_GETTTL(EXTRACT_32BITS(&tr->tr_rttlqid)));
151 (void)printf("[|igmp]");
156 print_igmpv3_report(register const u_char *bp, register u_int len)
158 u_int group, nsrcs, ngroups;
161 /* Minimum len is 16, and should be a multiple of 4 */
162 if (len < 16 || len & 0x03) {
163 (void)printf(" [invalid len %d]", len);
167 ngroups = EXTRACT_16BITS(&bp[6]);
168 (void)printf(", %d group record(s)", ngroups);
170 /* Print the group records */
172 for (i=0; i<ngroups; i++) {
174 (void)printf(" [invalid number of groups]");
177 TCHECK2(bp[group+4], 4);
178 (void)printf(" [gaddr %s", ipaddr_string(&bp[group+4]));
179 (void)printf(" %s", tok2str(igmpv3report2str, " [v3-report-#%d]",
181 nsrcs = EXTRACT_16BITS(&bp[group+2]);
182 /* Check the number of sources and print them */
183 if (len < group+8+(nsrcs<<2)) {
184 (void)printf(" [invalid number of sources %d]", nsrcs);
188 (void)printf(", %d source(s)", nsrcs);
190 /* Print the sources */
192 for (j=0; j<nsrcs; j++) {
193 TCHECK2(bp[group+8+(j<<2)], 4);
194 (void)printf(" %s", ipaddr_string(&bp[group+8+(j<<2)]));
198 /* Next group record */
199 group += 8 + (nsrcs << 2);
205 (void)printf("[|igmp]");
210 print_igmpv3_query(register const u_char *bp, register u_int len)
218 /* Minimum len is 12, and should be a multiple of 4 */
219 if (len < 12 || len & 0x03) {
220 (void)printf(" [invalid len %d]", len);
228 mrt = ((mrc & 0x0f) | 0x10) << (((mrc & 0x70) >> 4) + 3);
231 (void)printf(" [max resp time ");
236 if (EXTRACT_32BITS(&bp[4]) == 0)
238 (void)printf(" [gaddr %s", ipaddr_string(&bp[4]));
240 nsrcs = EXTRACT_16BITS(&bp[10]);
242 if (len < 12 + (nsrcs << 2))
243 (void)printf(" [invalid number of sources]");
244 else if (vflag > 1) {
246 for (i=0; i<nsrcs; i++) {
247 TCHECK2(bp[12+(i<<2)], 4);
248 (void)printf(" %s", ipaddr_string(&bp[12+(i<<2)]));
252 (void)printf(", %d source(s)", nsrcs);
257 (void)printf("[|igmp]");
262 igmp_print(register const u_char *bp, register u_int len)
265 (void)printf("igmp");
272 (void)printf("igmp query");
274 print_igmpv3_query(bp, len);
280 (void)printf(" [max resp time %d]", bp[1]);
284 if (EXTRACT_32BITS(&bp[4]))
285 (void)printf(" [gaddr %s]", ipaddr_string(&bp[4]));
287 (void)printf(" [len %d]", len);
292 (void)printf("igmp v1 report %s", ipaddr_string(&bp[4]));
294 (void)printf(" [len %d]", len);
298 (void)printf("igmp v2 report %s", ipaddr_string(&bp[4]));
301 (void)printf("igmp v3 report");
302 print_igmpv3_report(bp, len);
306 (void)printf("igmp leave %s", ipaddr_string(&bp[4]));
309 (void)printf("igmp dvmrp");
311 (void)printf(" [len %d]", len);
313 dvmrp_print(bp, len);
316 (void)printf("igmp pimv1");
317 pimv1_print(bp, len);
320 print_mresp(bp, len);
323 print_mtrace(bp, len);
326 (void)printf("igmp-%d", bp[0]);
330 if (vflag && TTEST2(bp[0], len)) {
331 /* Check the IGMP checksum */
332 if (in_cksum((const u_short*)bp, len, 0))
333 printf(" bad igmp cksum %x!", EXTRACT_16BITS(&bp[2]));
337 fputs("[|igmp]", stdout);