The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994, 1995, 1996 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * |
| 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. |
| 20 | */ |
| 21 | |
| 22 | #ifndef lint |
| 23 | static const char rcsid[] _U_ = |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 24 | "@(#) $Header: /tcpdump/master/tcpdump/print-igmp.c,v 1.15 2004-03-24 00:59:16 guy Exp $ (LBL)"; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 25 | #endif |
| 26 | |
| 27 | #ifdef HAVE_CONFIG_H |
| 28 | #include "config.h" |
| 29 | #endif |
| 30 | |
| 31 | #include <tcpdump-stdinc.h> |
| 32 | |
| 33 | #include <stdio.h> |
| 34 | #include <string.h> |
| 35 | |
| 36 | #include "interface.h" |
| 37 | #include "addrtoname.h" |
| 38 | #include "extract.h" /* must come after interface.h */ |
| 39 | |
| 40 | #ifndef IN_CLASSD |
| 41 | #define IN_CLASSD(i) (((int32_t)(i) & 0xf0000000) == 0xe0000000) |
| 42 | #endif |
| 43 | |
| 44 | /* (following from ipmulti/mrouted/prune.h) */ |
| 45 | |
| 46 | /* |
| 47 | * The packet format for a traceroute request. |
| 48 | */ |
| 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 */ |
| 54 | }; |
| 55 | |
| 56 | #define TR_GETTTL(x) (int)(((x) >> 24) & 0xff) |
| 57 | #define TR_GETQID(x) ((x) & 0x00ffffff) |
| 58 | |
| 59 | /* |
| 60 | * Traceroute response format. A traceroute response has a tr_query at the |
| 61 | * beginning, followed by one tr_resp for each hop taken. |
| 62 | */ |
| 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 */ |
| 75 | }; |
| 76 | |
| 77 | /* defs within mtrace */ |
| 78 | #define TR_QUERY 1 |
| 79 | #define TR_RESP 2 |
| 80 | |
| 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 |
| 91 | |
| 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 |
| 97 | |
| 98 | /* igmpv3 report types */ |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 99 | static const struct tok igmpv3report2str[] = { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 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 } |
| 107 | }; |
| 108 | |
| 109 | static void |
| 110 | print_mtrace(register const u_char *bp, register u_int len) |
| 111 | { |
| 112 | register const struct tr_query *tr = (const struct tr_query *)(bp + 8); |
| 113 | |
| 114 | TCHECK(*tr); |
| 115 | if (len < 8 + sizeof (struct tr_query)) { |
| 116 | (void)printf(" [invalid len %d]", len); |
| 117 | return; |
| 118 | } |
| 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; |
| 129 | } |
| 130 | |
| 131 | static void |
| 132 | print_mresp(register const u_char *bp, register u_int len) |
| 133 | { |
| 134 | register const struct tr_query *tr = (const struct tr_query *)(bp + 8); |
| 135 | |
| 136 | TCHECK(*tr); |
| 137 | if (len < 8 + sizeof (struct tr_query)) { |
| 138 | (void)printf(" [invalid len %d]", len); |
| 139 | return; |
| 140 | } |
| 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; |
| 151 | } |
| 152 | |
| 153 | static void |
| 154 | print_igmpv3_report(register const u_char *bp, register u_int len) |
| 155 | { |
| 156 | u_int group, nsrcs, ngroups; |
| 157 | register u_int i, j; |
| 158 | |
| 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; |
| 163 | } |
| 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; |
| 174 | } |
| 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; |
| 184 | } |
| 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)])); |
| 193 | } |
| 194 | (void)printf(" }"); |
| 195 | } |
| 196 | /* Next group record */ |
| 197 | group += 8 + (nsrcs << 2); |
| 198 | (void)printf("]"); |
| 199 | } |
| 200 | } |
| 201 | return; |
| 202 | trunc: |
| 203 | (void)printf("[|igmp]"); |
| 204 | return; |
| 205 | } |
| 206 | |
| 207 | static void |
| 208 | print_igmpv3_query(register const u_char *bp, register u_int len) |
| 209 | { |
| 210 | u_int mrc; |
| 211 | int mrt; |
| 212 | u_int nsrcs; |
| 213 | register u_int i; |
| 214 | |
| 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; |
| 220 | } |
| 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); |
| 227 | } |
| 228 | if (mrc != 100) { |
| 229 | (void)printf(" [max resp time "); |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 230 | if (mrt < 600) { |
| 231 | (void)printf("%.1fs", mrt * 0.1); |
| 232 | } else { |
| 233 | relts_print(mrt / 10); |
| 234 | } |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 235 | (void)printf("]"); |
| 236 | } |
| 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)])); |
| 251 | } |
| 252 | (void)printf(" }"); |
| 253 | } else |
| 254 | (void)printf(", %d source(s)", nsrcs); |
| 255 | } |
| 256 | (void)printf("]"); |
| 257 | return; |
| 258 | trunc: |
| 259 | (void)printf("[|igmp]"); |
| 260 | return; |
| 261 | } |
| 262 | |
| 263 | void |
| 264 | igmp_print(register const u_char *bp, register u_int len) |
| 265 | { |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 266 | struct cksum_vec vec[1]; |
| 267 | |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 268 | if (qflag) { |
| 269 | (void)printf("igmp"); |
| 270 | return; |
| 271 | } |
| 272 | |
| 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); |
| 292 | } |
| 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; |
| 332 | } |
| 333 | |
| 334 | if (vflag && TTEST2(bp[0], len)) { |
| 335 | /* Check the IGMP checksum */ |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 336 | vec[0].ptr = bp; |
| 337 | vec[0].len = len; |
| 338 | if (in_cksum(vec, 1)) |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 339 | printf(" bad igmp cksum %x!", EXTRACT_16BITS(&bp[2])); |
| 340 | } |
| 341 | return; |
| 342 | trunc: |
| 343 | fputs("[|igmp]", stdout); |
| 344 | } |