Prevent implicit -Wsystem-headers passing from CFLAGS to CXXFLAGS.
[dragonfly.git] / contrib / tcpdump / print-igmp.c
blob4087ee0980205cc6ea17e845c8cbe84bb9617e9a
1 /*
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
16 * written permission.
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.
22 #ifndef lint
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)";
25 #endif
27 #ifdef HAVE_CONFIG_H
28 #include "config.h"
29 #endif
31 #include <tcpdump-stdinc.h>
33 #include <stdio.h>
34 #include <string.h>
36 #include "interface.h"
37 #include "addrtoname.h"
38 #include "extract.h" /* must come after interface.h */
40 #ifndef IN_CLASSD
41 #define IN_CLASSD(i) (((int32_t)(i) & 0xf0000000) == 0xe0000000)
42 #endif
44 /* (following from ipmulti/mrouted/prune.h) */
47 * The packet format for a traceroute request.
49 struct tr_query {
50 u_int32_t tr_src; /* traceroute source */
51 u_int32_t tr_dst; /* traceroute destination */
52 u_int32_t tr_raddr; /* traceroute response address */
53 u_int32_t tr_rttlqid; /* response ttl and qid */
56 #define TR_GETTTL(x) (int)(((x) >> 24) & 0xff)
57 #define TR_GETQID(x) ((x) & 0x00ffffff)
60 * Traceroute response format. A traceroute response has a tr_query at the
61 * beginning, followed by one tr_resp for each hop taken.
63 struct tr_resp {
64 u_int32_t tr_qarr; /* query arrival time */
65 u_int32_t tr_inaddr; /* incoming interface address */
66 u_int32_t tr_outaddr; /* outgoing interface address */
67 u_int32_t tr_rmtaddr; /* parent address in source tree */
68 u_int32_t tr_vifin; /* input packet count on interface */
69 u_int32_t tr_vifout; /* output packet count on interface */
70 u_int32_t tr_pktcnt; /* total incoming packets for src-grp */
71 u_int8_t tr_rproto; /* routing proto deployed on router */
72 u_int8_t tr_fttl; /* ttl required to forward on outvif */
73 u_int8_t tr_smask; /* subnet mask for src addr */
74 u_int8_t tr_rflags; /* forwarding error codes */
77 /* defs within mtrace */
78 #define TR_QUERY 1
79 #define TR_RESP 2
81 /* fields for tr_rflags (forwarding error codes) */
82 #define TR_NO_ERR 0
83 #define TR_WRONG_IF 1
84 #define TR_PRUNED 2
85 #define TR_OPRUNED 3
86 #define TR_SCOPED 4
87 #define TR_NO_RTE 5
88 #define TR_NO_FWD 7
89 #define TR_NO_SPACE 0x81
90 #define TR_OLD_ROUTER 0x82
92 /* fields for tr_rproto (routing protocol) */
93 #define TR_PROTO_DVMRP 1
94 #define TR_PROTO_MOSPF 2
95 #define TR_PROTO_PIM 3
96 #define TR_PROTO_CBT 4
98 /* igmpv3 report types */
99 static struct tok igmpv3report2str[] = {
100 { 1, "is_in" },
101 { 2, "is_ex" },
102 { 3, "to_in" },
103 { 4, "to_ex" },
104 { 5, "allow" },
105 { 6, "block" },
106 { 0, NULL }
109 static void
110 print_mtrace(register const u_char *bp, register u_int len)
112 register const struct tr_query *tr = (const struct tr_query *)(bp + 8);
114 TCHECK(*tr);
115 if (len < 8 + sizeof (struct tr_query)) {
116 (void)printf(" [invalid len %d]", len);
117 return;
119 printf("mtrace %u: %s to %s reply-to %s",
120 TR_GETQID(EXTRACT_32BITS(&tr->tr_rttlqid)),
121 ipaddr_string(&tr->tr_src), ipaddr_string(&tr->tr_dst),
122 ipaddr_string(&tr->tr_raddr));
123 if (IN_CLASSD(EXTRACT_32BITS(&tr->tr_raddr)))
124 printf(" with-ttl %d", TR_GETTTL(EXTRACT_32BITS(&tr->tr_rttlqid)));
125 return;
126 trunc:
127 (void)printf("[|igmp]");
128 return;
131 static void
132 print_mresp(register const u_char *bp, register u_int len)
134 register const struct tr_query *tr = (const struct tr_query *)(bp + 8);
136 TCHECK(*tr);
137 if (len < 8 + sizeof (struct tr_query)) {
138 (void)printf(" [invalid len %d]", len);
139 return;
141 printf("mresp %lu: %s to %s reply-to %s",
142 (u_long)TR_GETQID(EXTRACT_32BITS(&tr->tr_rttlqid)),
143 ipaddr_string(&tr->tr_src), ipaddr_string(&tr->tr_dst),
144 ipaddr_string(&tr->tr_raddr));
145 if (IN_CLASSD(EXTRACT_32BITS(&tr->tr_raddr)))
146 printf(" with-ttl %d", TR_GETTTL(EXTRACT_32BITS(&tr->tr_rttlqid)));
147 return;
148 trunc:
149 (void)printf("[|igmp]");
150 return;
153 static void
154 print_igmpv3_report(register const u_char *bp, register u_int len)
156 u_int group, nsrcs, ngroups;
157 register u_int i, j;
159 /* Minimum len is 16, and should be a multiple of 4 */
160 if (len < 16 || len & 0x03) {
161 (void)printf(" [invalid len %d]", len);
162 return;
164 TCHECK2(bp[6], 2);
165 ngroups = EXTRACT_16BITS(&bp[6]);
166 (void)printf(", %d group record(s)", ngroups);
167 if (vflag > 0) {
168 /* Print the group records */
169 group = 8;
170 for (i=0; i<ngroups; i++) {
171 if (len < group+8) {
172 (void)printf(" [invalid number of groups]");
173 return;
175 TCHECK2(bp[group+4], 4);
176 (void)printf(" [gaddr %s", ipaddr_string(&bp[group+4]));
177 (void)printf(" %s", tok2str(igmpv3report2str, " [v3-report-#%d]",
178 bp[group]));
179 nsrcs = EXTRACT_16BITS(&bp[group+2]);
180 /* Check the number of sources and print them */
181 if (len < group+8+(nsrcs<<2)) {
182 (void)printf(" [invalid number of sources %d]", nsrcs);
183 return;
185 if (vflag == 1)
186 (void)printf(", %d source(s)", nsrcs);
187 else {
188 /* Print the sources */
189 (void)printf(" {");
190 for (j=0; j<nsrcs; j++) {
191 TCHECK2(bp[group+8+(j<<2)], 4);
192 (void)printf(" %s", ipaddr_string(&bp[group+8+(j<<2)]));
194 (void)printf(" }");
196 /* Next group record */
197 group += 8 + (nsrcs << 2);
198 (void)printf("]");
201 return;
202 trunc:
203 (void)printf("[|igmp]");
204 return;
207 static void
208 print_igmpv3_query(register const u_char *bp, register u_int len)
210 u_int mrc;
211 int mrt;
212 u_int nsrcs;
213 register u_int i;
215 (void)printf(" v3");
216 /* Minimum len is 12, and should be a multiple of 4 */
217 if (len < 12 || len & 0x03) {
218 (void)printf(" [invalid len %d]", len);
219 return;
221 TCHECK(bp[1]);
222 mrc = bp[1];
223 if (mrc < 128) {
224 mrt = mrc;
225 } else {
226 mrt = ((mrc & 0x0f) | 0x10) << (((mrc & 0x70) >> 4) + 3);
228 if (mrc != 100) {
229 (void)printf(" [max resp time ");
230 if (mrt < 600) {
231 (void)printf("%.1fs", mrt * 0.1);
232 } else {
233 relts_print(mrt / 10);
235 (void)printf("]");
237 TCHECK2(bp[4], 4);
238 if (EXTRACT_32BITS(&bp[4]) == 0)
239 return;
240 (void)printf(" [gaddr %s", ipaddr_string(&bp[4]));
241 TCHECK2(bp[10], 2);
242 nsrcs = EXTRACT_16BITS(&bp[10]);
243 if (nsrcs > 0) {
244 if (len < 12 + (nsrcs << 2))
245 (void)printf(" [invalid number of sources]");
246 else if (vflag > 1) {
247 (void)printf(" {");
248 for (i=0; i<nsrcs; i++) {
249 TCHECK2(bp[12+(i<<2)], 4);
250 (void)printf(" %s", ipaddr_string(&bp[12+(i<<2)]));
252 (void)printf(" }");
253 } else
254 (void)printf(", %d source(s)", nsrcs);
256 (void)printf("]");
257 return;
258 trunc:
259 (void)printf("[|igmp]");
260 return;
263 void
264 igmp_print(register const u_char *bp, register u_int len)
266 struct cksum_vec vec[1];
268 if (qflag) {
269 (void)printf("igmp");
270 return;
273 TCHECK(bp[0]);
274 switch (bp[0]) {
275 case 0x11:
276 (void)printf("igmp query");
277 if (len >= 12)
278 print_igmpv3_query(bp, len);
279 else {
280 TCHECK(bp[1]);
281 if (bp[1]) {
282 (void)printf(" v2");
283 if (bp[1] != 100)
284 (void)printf(" [max resp time %d]", bp[1]);
285 } else
286 (void)printf(" v1");
287 TCHECK2(bp[4], 4);
288 if (EXTRACT_32BITS(&bp[4]))
289 (void)printf(" [gaddr %s]", ipaddr_string(&bp[4]));
290 if (len != 8)
291 (void)printf(" [len %d]", len);
293 break;
294 case 0x12:
295 TCHECK2(bp[4], 4);
296 (void)printf("igmp v1 report %s", ipaddr_string(&bp[4]));
297 if (len != 8)
298 (void)printf(" [len %d]", len);
299 break;
300 case 0x16:
301 TCHECK2(bp[4], 4);
302 (void)printf("igmp v2 report %s", ipaddr_string(&bp[4]));
303 break;
304 case 0x22:
305 (void)printf("igmp v3 report");
306 print_igmpv3_report(bp, len);
307 break;
308 case 0x17:
309 TCHECK2(bp[4], 4);
310 (void)printf("igmp leave %s", ipaddr_string(&bp[4]));
311 break;
312 case 0x13:
313 (void)printf("igmp dvmrp");
314 if (len < 8)
315 (void)printf(" [len %d]", len);
316 else
317 dvmrp_print(bp, len);
318 break;
319 case 0x14:
320 (void)printf("igmp pimv1");
321 pimv1_print(bp, len);
322 break;
323 case 0x1e:
324 print_mresp(bp, len);
325 break;
326 case 0x1f:
327 print_mtrace(bp, len);
328 break;
329 default:
330 (void)printf("igmp-%d", bp[0]);
331 break;
334 if (vflag && TTEST2(bp[0], len)) {
335 /* Check the IGMP checksum */
336 vec[0].ptr = bp;
337 vec[0].len = len;
338 if (in_cksum(vec, 1))
339 printf(" bad igmp cksum %x!", EXTRACT_16BITS(&bp[2]));
341 return;
342 trunc:
343 fputs("[|igmp]", stdout);