1 /* 2 * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994 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 #define NETDISSECT_REWORKED 23 #ifdef HAVE_CONFIG_H 24 #include "config.h" 25 #endif 26 27 #ifdef INET6 28 29 #include <tcpdump-stdinc.h> 30 31 #include <stdio.h> 32 #include <string.h> 33 34 #include "interface.h" 35 #include "addrtoname.h" 36 #include "extract.h" 37 38 #include "ip6.h" 39 #include "ipproto.h" 40 41 #include "udp.h" 42 #include "ah.h" 43 44 /* NetBSD: icmp6.h,v 1.13 2000/08/03 16:30:37 itojun Exp */ 45 /* $KAME: icmp6.h,v 1.22 2000/08/03 15:25:16 jinmei Exp $ */ 46 47 /* 48 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 49 * All rights reserved. 50 * 51 * Redistribution and use in source and binary forms, with or without 52 * modification, are permitted provided that the following conditions 53 * are met: 54 * 1. Redistributions of source code must retain the above copyright 55 * notice, this list of conditions and the following disclaimer. 56 * 2. Redistributions in binary form must reproduce the above copyright 57 * notice, this list of conditions and the following disclaimer in the 58 * documentation and/or other materials provided with the distribution. 59 * 3. Neither the name of the project nor the names of its contributors 60 * may be used to endorse or promote products derived from this software 61 * without specific prior written permission. 62 * 63 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 64 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 65 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 66 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 67 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 68 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 69 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 70 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 71 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 72 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 73 * SUCH DAMAGE. 74 */ 75 76 struct icmp6_hdr { 77 uint8_t icmp6_type; /* type field */ 78 uint8_t icmp6_code; /* code field */ 79 uint16_t icmp6_cksum; /* checksum field */ 80 union { 81 uint32_t icmp6_un_data32[1]; /* type-specific field */ 82 uint16_t icmp6_un_data16[2]; /* type-specific field */ 83 uint8_t icmp6_un_data8[4]; /* type-specific field */ 84 } icmp6_dataun; 85 }; 86 87 #define icmp6_data32 icmp6_dataun.icmp6_un_data32 88 #define icmp6_data16 icmp6_dataun.icmp6_un_data16 89 #define icmp6_data8 icmp6_dataun.icmp6_un_data8 90 #define icmp6_pptr icmp6_data32[0] /* parameter prob */ 91 #define icmp6_mtu icmp6_data32[0] /* packet too big */ 92 #define icmp6_id icmp6_data16[0] /* echo request/reply */ 93 #define icmp6_seq icmp6_data16[1] /* echo request/reply */ 94 #define icmp6_maxdelay icmp6_data16[0] /* mcast group membership */ 95 96 #define ICMP6_DST_UNREACH 1 /* dest unreachable, codes: */ 97 #define ICMP6_PACKET_TOO_BIG 2 /* packet too big */ 98 #define ICMP6_TIME_EXCEEDED 3 /* time exceeded, code: */ 99 #define ICMP6_PARAM_PROB 4 /* ip6 header bad */ 100 101 #define ICMP6_ECHO_REQUEST 128 /* echo service */ 102 #define ICMP6_ECHO_REPLY 129 /* echo reply */ 103 #define ICMP6_MEMBERSHIP_QUERY 130 /* group membership query */ 104 #define MLD6_LISTENER_QUERY 130 /* multicast listener query */ 105 #define ICMP6_MEMBERSHIP_REPORT 131 /* group membership report */ 106 #define MLD6_LISTENER_REPORT 131 /* multicast listener report */ 107 #define ICMP6_MEMBERSHIP_REDUCTION 132 /* group membership termination */ 108 #define MLD6_LISTENER_DONE 132 /* multicast listener done */ 109 110 #define ND_ROUTER_SOLICIT 133 /* router solicitation */ 111 #define ND_ROUTER_ADVERT 134 /* router advertisement */ 112 #define ND_NEIGHBOR_SOLICIT 135 /* neighbor solicitation */ 113 #define ND_NEIGHBOR_ADVERT 136 /* neighbor advertisement */ 114 #define ND_REDIRECT 137 /* redirect */ 115 116 #define ICMP6_ROUTER_RENUMBERING 138 /* router renumbering */ 117 118 #define ICMP6_WRUREQUEST 139 /* who are you request */ 119 #define ICMP6_WRUREPLY 140 /* who are you reply */ 120 #define ICMP6_FQDN_QUERY 139 /* FQDN query */ 121 #define ICMP6_FQDN_REPLY 140 /* FQDN reply */ 122 #define ICMP6_NI_QUERY 139 /* node information request */ 123 #define ICMP6_NI_REPLY 140 /* node information reply */ 124 #define IND_SOLICIT 141 /* inverse neighbor solicitation */ 125 #define IND_ADVERT 142 /* inverse neighbor advertisement */ 126 127 #define ICMP6_V2_MEMBERSHIP_REPORT 143 /* v2 membership report */ 128 #define MLDV2_LISTENER_REPORT 143 /* v2 multicast listener report */ 129 #define ICMP6_HADISCOV_REQUEST 144 130 #define ICMP6_HADISCOV_REPLY 145 131 #define ICMP6_MOBILEPREFIX_SOLICIT 146 132 #define ICMP6_MOBILEPREFIX_ADVERT 147 133 134 #define MLD6_MTRACE_RESP 200 /* mtrace response(to sender) */ 135 #define MLD6_MTRACE 201 /* mtrace messages */ 136 137 #define ICMP6_MAXTYPE 201 138 139 #define ICMP6_DST_UNREACH_NOROUTE 0 /* no route to destination */ 140 #define ICMP6_DST_UNREACH_ADMIN 1 /* administratively prohibited */ 141 #define ICMP6_DST_UNREACH_NOTNEIGHBOR 2 /* not a neighbor(obsolete) */ 142 #define ICMP6_DST_UNREACH_BEYONDSCOPE 2 /* beyond scope of source address */ 143 #define ICMP6_DST_UNREACH_ADDR 3 /* address unreachable */ 144 #define ICMP6_DST_UNREACH_NOPORT 4 /* port unreachable */ 145 146 #define ICMP6_TIME_EXCEED_TRANSIT 0 /* ttl==0 in transit */ 147 #define ICMP6_TIME_EXCEED_REASSEMBLY 1 /* ttl==0 in reass */ 148 149 #define ICMP6_PARAMPROB_HEADER 0 /* erroneous header field */ 150 #define ICMP6_PARAMPROB_NEXTHEADER 1 /* unrecognized next header */ 151 #define ICMP6_PARAMPROB_OPTION 2 /* unrecognized option */ 152 153 #define ICMP6_INFOMSG_MASK 0x80 /* all informational messages */ 154 155 #define ICMP6_NI_SUBJ_IPV6 0 /* Query Subject is an IPv6 address */ 156 #define ICMP6_NI_SUBJ_FQDN 1 /* Query Subject is a Domain name */ 157 #define ICMP6_NI_SUBJ_IPV4 2 /* Query Subject is an IPv4 address */ 158 159 #define ICMP6_NI_SUCCESS 0 /* node information successful reply */ 160 #define ICMP6_NI_REFUSED 1 /* node information request is refused */ 161 #define ICMP6_NI_UNKNOWN 2 /* unknown Qtype */ 162 163 #define ICMP6_ROUTER_RENUMBERING_COMMAND 0 /* rr command */ 164 #define ICMP6_ROUTER_RENUMBERING_RESULT 1 /* rr result */ 165 #define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET 255 /* rr seq num reset */ 166 167 /* Used in kernel only */ 168 #define ND_REDIRECT_ONLINK 0 /* redirect to an on-link node */ 169 #define ND_REDIRECT_ROUTER 1 /* redirect to a better router */ 170 171 /* 172 * Multicast Listener Discovery 173 */ 174 struct mld6_hdr { 175 struct icmp6_hdr mld6_hdr; 176 struct in6_addr mld6_addr; /* multicast address */ 177 }; 178 179 #define mld6_type mld6_hdr.icmp6_type 180 #define mld6_code mld6_hdr.icmp6_code 181 #define mld6_cksum mld6_hdr.icmp6_cksum 182 #define mld6_maxdelay mld6_hdr.icmp6_data16[0] 183 #define mld6_reserved mld6_hdr.icmp6_data16[1] 184 185 #define MLD_MINLEN 24 186 #define MLDV2_MINLEN 28 187 188 /* 189 * Neighbor Discovery 190 */ 191 192 struct nd_router_solicit { /* router solicitation */ 193 struct icmp6_hdr nd_rs_hdr; 194 /* could be followed by options */ 195 }; 196 197 #define nd_rs_type nd_rs_hdr.icmp6_type 198 #define nd_rs_code nd_rs_hdr.icmp6_code 199 #define nd_rs_cksum nd_rs_hdr.icmp6_cksum 200 #define nd_rs_reserved nd_rs_hdr.icmp6_data32[0] 201 202 struct nd_router_advert { /* router advertisement */ 203 struct icmp6_hdr nd_ra_hdr; 204 uint32_t nd_ra_reachable; /* reachable time */ 205 uint32_t nd_ra_retransmit; /* retransmit timer */ 206 /* could be followed by options */ 207 }; 208 209 #define nd_ra_type nd_ra_hdr.icmp6_type 210 #define nd_ra_code nd_ra_hdr.icmp6_code 211 #define nd_ra_cksum nd_ra_hdr.icmp6_cksum 212 #define nd_ra_curhoplimit nd_ra_hdr.icmp6_data8[0] 213 #define nd_ra_flags_reserved nd_ra_hdr.icmp6_data8[1] 214 #define ND_RA_FLAG_MANAGED 0x80 215 #define ND_RA_FLAG_OTHER 0x40 216 #define ND_RA_FLAG_HOME_AGENT 0x20 217 218 /* 219 * Router preference values based on draft-draves-ipngwg-router-selection-01. 220 * These are non-standard definitions. 221 */ 222 #define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */ 223 224 #define ND_RA_FLAG_RTPREF_HIGH 0x08 /* 00001000 */ 225 #define ND_RA_FLAG_RTPREF_MEDIUM 0x00 /* 00000000 */ 226 #define ND_RA_FLAG_RTPREF_LOW 0x18 /* 00011000 */ 227 #define ND_RA_FLAG_RTPREF_RSV 0x10 /* 00010000 */ 228 229 #define nd_ra_router_lifetime nd_ra_hdr.icmp6_data16[1] 230 231 struct nd_neighbor_solicit { /* neighbor solicitation */ 232 struct icmp6_hdr nd_ns_hdr; 233 struct in6_addr nd_ns_target; /*target address */ 234 /* could be followed by options */ 235 }; 236 237 #define nd_ns_type nd_ns_hdr.icmp6_type 238 #define nd_ns_code nd_ns_hdr.icmp6_code 239 #define nd_ns_cksum nd_ns_hdr.icmp6_cksum 240 #define nd_ns_reserved nd_ns_hdr.icmp6_data32[0] 241 242 struct nd_neighbor_advert { /* neighbor advertisement */ 243 struct icmp6_hdr nd_na_hdr; 244 struct in6_addr nd_na_target; /* target address */ 245 /* could be followed by options */ 246 }; 247 248 #define nd_na_type nd_na_hdr.icmp6_type 249 #define nd_na_code nd_na_hdr.icmp6_code 250 #define nd_na_cksum nd_na_hdr.icmp6_cksum 251 #define nd_na_flags_reserved nd_na_hdr.icmp6_data32[0] 252 253 #define ND_NA_FLAG_ROUTER 0x80000000 254 #define ND_NA_FLAG_SOLICITED 0x40000000 255 #define ND_NA_FLAG_OVERRIDE 0x20000000 256 257 struct nd_redirect { /* redirect */ 258 struct icmp6_hdr nd_rd_hdr; 259 struct in6_addr nd_rd_target; /* target address */ 260 struct in6_addr nd_rd_dst; /* destination address */ 261 /* could be followed by options */ 262 }; 263 264 #define nd_rd_type nd_rd_hdr.icmp6_type 265 #define nd_rd_code nd_rd_hdr.icmp6_code 266 #define nd_rd_cksum nd_rd_hdr.icmp6_cksum 267 #define nd_rd_reserved nd_rd_hdr.icmp6_data32[0] 268 269 struct nd_opt_hdr { /* Neighbor discovery option header */ 270 uint8_t nd_opt_type; 271 uint8_t nd_opt_len; 272 /* followed by option specific data*/ 273 }; 274 275 #define ND_OPT_SOURCE_LINKADDR 1 276 #define ND_OPT_TARGET_LINKADDR 2 277 #define ND_OPT_PREFIX_INFORMATION 3 278 #define ND_OPT_REDIRECTED_HEADER 4 279 #define ND_OPT_MTU 5 280 #define ND_OPT_ADVINTERVAL 7 281 #define ND_OPT_HOMEAGENT_INFO 8 282 #define ND_OPT_ROUTE_INFO 24 /* RFC4191 */ 283 #define ND_OPT_RDNSS 25 284 #define ND_OPT_DNSSL 31 285 286 struct nd_opt_prefix_info { /* prefix information */ 287 uint8_t nd_opt_pi_type; 288 uint8_t nd_opt_pi_len; 289 uint8_t nd_opt_pi_prefix_len; 290 uint8_t nd_opt_pi_flags_reserved; 291 uint8_t nd_opt_pi_valid_time[4]; 292 uint8_t nd_opt_pi_preferred_time[4]; 293 uint8_t nd_opt_pi_reserved2[4]; 294 struct in6_addr nd_opt_pi_prefix; 295 }; 296 297 #define ND_OPT_PI_FLAG_ONLINK 0x80 298 #define ND_OPT_PI_FLAG_AUTO 0x40 299 #define ND_OPT_PI_FLAG_ROUTER 0x20 /*2292bis*/ 300 301 struct nd_opt_rd_hdr { /* redirected header */ 302 uint8_t nd_opt_rh_type; 303 uint8_t nd_opt_rh_len; 304 uint16_t nd_opt_rh_reserved1; 305 uint32_t nd_opt_rh_reserved2; 306 /* followed by IP header and data */ 307 }; 308 309 struct nd_opt_mtu { /* MTU option */ 310 uint8_t nd_opt_mtu_type; 311 uint8_t nd_opt_mtu_len; 312 uint16_t nd_opt_mtu_reserved; 313 uint32_t nd_opt_mtu_mtu; 314 }; 315 316 struct nd_opt_rdnss { /* RDNSS RFC 6106 5.1 */ 317 uint8_t nd_opt_rdnss_type; 318 uint8_t nd_opt_rdnss_len; 319 uint16_t nd_opt_rdnss_reserved; 320 uint32_t nd_opt_rdnss_lifetime; 321 struct in6_addr nd_opt_rdnss_addr[1]; /* variable-length */ 322 }; 323 324 struct nd_opt_dnssl { /* DNSSL RFC 6106 5.2 */ 325 uint8_t nd_opt_dnssl_type; 326 uint8_t nd_opt_dnssl_len; 327 uint16_t nd_opt_dnssl_reserved; 328 uint32_t nd_opt_dnssl_lifetime; 329 /* followed by list of DNS search domains, variable-length */ 330 }; 331 332 struct nd_opt_advinterval { /* Advertisement interval option */ 333 uint8_t nd_opt_adv_type; 334 uint8_t nd_opt_adv_len; 335 uint16_t nd_opt_adv_reserved; 336 uint32_t nd_opt_adv_interval; 337 }; 338 339 struct nd_opt_homeagent_info { /* Home Agent info */ 340 uint8_t nd_opt_hai_type; 341 uint8_t nd_opt_hai_len; 342 uint16_t nd_opt_hai_reserved; 343 int16_t nd_opt_hai_preference; 344 uint16_t nd_opt_hai_lifetime; 345 }; 346 347 struct nd_opt_route_info { /* route info */ 348 uint8_t nd_opt_rti_type; 349 uint8_t nd_opt_rti_len; 350 uint8_t nd_opt_rti_prefixlen; 351 uint8_t nd_opt_rti_flags; 352 uint32_t nd_opt_rti_lifetime; 353 /* prefix follows */ 354 }; 355 356 /* 357 * icmp6 namelookup 358 */ 359 360 struct icmp6_namelookup { 361 struct icmp6_hdr icmp6_nl_hdr; 362 uint8_t icmp6_nl_nonce[8]; 363 int32_t icmp6_nl_ttl; 364 #if 0 365 uint8_t icmp6_nl_len; 366 uint8_t icmp6_nl_name[3]; 367 #endif 368 /* could be followed by options */ 369 }; 370 371 /* 372 * icmp6 node information 373 */ 374 struct icmp6_nodeinfo { 375 struct icmp6_hdr icmp6_ni_hdr; 376 uint8_t icmp6_ni_nonce[8]; 377 /* could be followed by reply data */ 378 }; 379 380 #define ni_type icmp6_ni_hdr.icmp6_type 381 #define ni_code icmp6_ni_hdr.icmp6_code 382 #define ni_cksum icmp6_ni_hdr.icmp6_cksum 383 #define ni_qtype icmp6_ni_hdr.icmp6_data16[0] 384 #define ni_flags icmp6_ni_hdr.icmp6_data16[1] 385 386 #define NI_QTYPE_NOOP 0 /* NOOP */ 387 #define NI_QTYPE_SUPTYPES 1 /* Supported Qtypes */ 388 #define NI_QTYPE_FQDN 2 /* FQDN (draft 04) */ 389 #define NI_QTYPE_DNSNAME 2 /* DNS Name */ 390 #define NI_QTYPE_NODEADDR 3 /* Node Addresses */ 391 #define NI_QTYPE_IPV4ADDR 4 /* IPv4 Addresses */ 392 393 /* network endian */ 394 #define NI_SUPTYPE_FLAG_COMPRESS ((uint16_t)htons(0x1)) 395 #define NI_FQDN_FLAG_VALIDTTL ((uint16_t)htons(0x1)) 396 397 /* network endian */ 398 #define NI_NODEADDR_FLAG_TRUNCATE ((uint16_t)htons(0x1)) 399 #define NI_NODEADDR_FLAG_ALL ((uint16_t)htons(0x2)) 400 #define NI_NODEADDR_FLAG_COMPAT ((uint16_t)htons(0x4)) 401 #define NI_NODEADDR_FLAG_LINKLOCAL ((uint16_t)htons(0x8)) 402 #define NI_NODEADDR_FLAG_SITELOCAL ((uint16_t)htons(0x10)) 403 #define NI_NODEADDR_FLAG_GLOBAL ((uint16_t)htons(0x20)) 404 #define NI_NODEADDR_FLAG_ANYCAST ((uint16_t)htons(0x40)) /* just experimental. not in spec */ 405 406 struct ni_reply_fqdn { 407 uint32_t ni_fqdn_ttl; /* TTL */ 408 uint8_t ni_fqdn_namelen; /* length in octets of the FQDN */ 409 uint8_t ni_fqdn_name[3]; /* XXX: alignment */ 410 }; 411 412 /* 413 * Router Renumbering. as router-renum-08.txt 414 */ 415 struct icmp6_router_renum { /* router renumbering header */ 416 struct icmp6_hdr rr_hdr; 417 uint8_t rr_segnum; 418 uint8_t rr_flags; 419 uint16_t rr_maxdelay; 420 uint32_t rr_reserved; 421 }; 422 #define ICMP6_RR_FLAGS_TEST 0x80 423 #define ICMP6_RR_FLAGS_REQRESULT 0x40 424 #define ICMP6_RR_FLAGS_FORCEAPPLY 0x20 425 #define ICMP6_RR_FLAGS_SPECSITE 0x10 426 #define ICMP6_RR_FLAGS_PREVDONE 0x08 427 428 #define rr_type rr_hdr.icmp6_type 429 #define rr_code rr_hdr.icmp6_code 430 #define rr_cksum rr_hdr.icmp6_cksum 431 #define rr_seqnum rr_hdr.icmp6_data32[0] 432 433 struct rr_pco_match { /* match prefix part */ 434 uint8_t rpm_code; 435 uint8_t rpm_len; 436 uint8_t rpm_ordinal; 437 uint8_t rpm_matchlen; 438 uint8_t rpm_minlen; 439 uint8_t rpm_maxlen; 440 uint16_t rpm_reserved; 441 struct in6_addr rpm_prefix; 442 }; 443 444 #define RPM_PCO_ADD 1 445 #define RPM_PCO_CHANGE 2 446 #define RPM_PCO_SETGLOBAL 3 447 #define RPM_PCO_MAX 4 448 449 struct rr_pco_use { /* use prefix part */ 450 uint8_t rpu_uselen; 451 uint8_t rpu_keeplen; 452 uint8_t rpu_ramask; 453 uint8_t rpu_raflags; 454 uint32_t rpu_vltime; 455 uint32_t rpu_pltime; 456 uint32_t rpu_flags; 457 struct in6_addr rpu_prefix; 458 }; 459 #define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK 0x80 460 #define ICMP6_RR_PCOUSE_RAFLAGS_AUTO 0x40 461 462 /* network endian */ 463 #define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME ((uint32_t)htonl(0x80000000)) 464 #define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME ((uint32_t)htonl(0x40000000)) 465 466 struct rr_result { /* router renumbering result message */ 467 uint16_t rrr_flags; 468 uint8_t rrr_ordinal; 469 uint8_t rrr_matchedlen; 470 uint32_t rrr_ifid; 471 struct in6_addr rrr_prefix; 472 }; 473 /* network endian */ 474 #define ICMP6_RR_RESULT_FLAGS_OOB ((uint16_t)htons(0x0002)) 475 #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN ((uint16_t)htons(0x0001)) 476 477 static const char *get_rtpref(u_int); 478 static const char *get_lifetime(uint32_t); 479 static void print_lladdr(netdissect_options *ndo, const u_char *, size_t); 480 static void icmp6_opt_print(netdissect_options *ndo, const u_char *, int); 481 static void mld6_print(netdissect_options *ndo, const u_char *); 482 static void mldv2_report_print(netdissect_options *ndo, const u_char *, u_int); 483 static void mldv2_query_print(netdissect_options *ndo, const u_char *, u_int); 484 static const struct udphdr *get_upperlayer(netdissect_options *ndo, const u_char *, u_int *); 485 static void dnsname_print(netdissect_options *ndo, const u_char *, const u_char *); 486 static void icmp6_nodeinfo_print(netdissect_options *ndo, u_int, const u_char *, const u_char *); 487 static void icmp6_rrenum_print(netdissect_options *ndo, const u_char *, const u_char *); 488 489 #ifndef abs 490 #define abs(a) ((0 < (a)) ? (a) : -(a)) 491 #endif 492 493 #include "rpl.h" 494 495 static const struct tok icmp6_type_values[] = { 496 { ICMP6_DST_UNREACH, "destination unreachable"}, 497 { ICMP6_PACKET_TOO_BIG, "packet too big"}, 498 { ICMP6_TIME_EXCEEDED, "time exceeded in-transit"}, 499 { ICMP6_PARAM_PROB, "parameter problem"}, 500 { ICMP6_ECHO_REQUEST, "echo request"}, 501 { ICMP6_ECHO_REPLY, "echo reply"}, 502 { MLD6_LISTENER_QUERY, "multicast listener query"}, 503 { MLD6_LISTENER_REPORT, "multicast listener report"}, 504 { MLD6_LISTENER_DONE, "multicast listener done"}, 505 { ND_ROUTER_SOLICIT, "router solicitation"}, 506 { ND_ROUTER_ADVERT, "router advertisement"}, 507 { ND_NEIGHBOR_SOLICIT, "neighbor solicitation"}, 508 { ND_NEIGHBOR_ADVERT, "neighbor advertisement"}, 509 { ND_REDIRECT, "redirect"}, 510 { ICMP6_ROUTER_RENUMBERING, "router renumbering"}, 511 { IND_SOLICIT, "inverse neighbor solicitation"}, 512 { IND_ADVERT, "inverse neighbor advertisement"}, 513 { MLDV2_LISTENER_REPORT, "multicast listener report v2"}, 514 { ICMP6_HADISCOV_REQUEST, "ha discovery request"}, 515 { ICMP6_HADISCOV_REPLY, "ha discovery reply"}, 516 { ICMP6_MOBILEPREFIX_SOLICIT, "mobile router solicitation"}, 517 { ICMP6_MOBILEPREFIX_ADVERT, "mobile router advertisement"}, 518 { ICMP6_WRUREQUEST, "who-are-you request"}, 519 { ICMP6_WRUREPLY, "who-are-you reply"}, 520 { ICMP6_NI_QUERY, "node information query"}, 521 { ICMP6_NI_REPLY, "node information reply"}, 522 { MLD6_MTRACE, "mtrace message"}, 523 { MLD6_MTRACE_RESP, "mtrace response"}, 524 { ND_RPL_MESSAGE, "RPL"}, 525 { 0, NULL } 526 }; 527 528 static const struct tok icmp6_dst_unreach_code_values[] = { 529 { ICMP6_DST_UNREACH_NOROUTE, "unreachable route" }, 530 { ICMP6_DST_UNREACH_ADMIN, " unreachable prohibited"}, 531 { ICMP6_DST_UNREACH_BEYONDSCOPE, "beyond scope"}, 532 { ICMP6_DST_UNREACH_ADDR, "unreachable address"}, 533 { ICMP6_DST_UNREACH_NOPORT, "unreachable port"}, 534 { 0, NULL } 535 }; 536 537 static const struct tok icmp6_opt_pi_flag_values[] = { 538 { ND_OPT_PI_FLAG_ONLINK, "onlink" }, 539 { ND_OPT_PI_FLAG_AUTO, "auto" }, 540 { ND_OPT_PI_FLAG_ROUTER, "router" }, 541 { 0, NULL } 542 }; 543 544 static const struct tok icmp6_opt_ra_flag_values[] = { 545 { ND_RA_FLAG_MANAGED, "managed" }, 546 { ND_RA_FLAG_OTHER, "other stateful"}, 547 { ND_RA_FLAG_HOME_AGENT, "home agent"}, 548 { 0, NULL } 549 }; 550 551 static const struct tok icmp6_nd_na_flag_values[] = { 552 { ND_NA_FLAG_ROUTER, "router" }, 553 { ND_NA_FLAG_SOLICITED, "solicited" }, 554 { ND_NA_FLAG_OVERRIDE, "override" }, 555 { 0, NULL } 556 }; 557 558 559 static const struct tok icmp6_opt_values[] = { 560 { ND_OPT_SOURCE_LINKADDR, "source link-address"}, 561 { ND_OPT_TARGET_LINKADDR, "destination link-address"}, 562 { ND_OPT_PREFIX_INFORMATION, "prefix info"}, 563 { ND_OPT_REDIRECTED_HEADER, "redirected header"}, 564 { ND_OPT_MTU, "mtu"}, 565 { ND_OPT_RDNSS, "rdnss"}, 566 { ND_OPT_DNSSL, "dnssl"}, 567 { ND_OPT_ADVINTERVAL, "advertisement interval"}, 568 { ND_OPT_HOMEAGENT_INFO, "homeagent information"}, 569 { ND_OPT_ROUTE_INFO, "route info"}, 570 { 0, NULL } 571 }; 572 573 /* mldv2 report types */ 574 static const struct tok mldv2report2str[] = { 575 { 1, "is_in" }, 576 { 2, "is_ex" }, 577 { 3, "to_in" }, 578 { 4, "to_ex" }, 579 { 5, "allow" }, 580 { 6, "block" }, 581 { 0, NULL } 582 }; 583 584 static const char * 585 get_rtpref(u_int v) 586 { 587 static const char *rtpref_str[] = { 588 "medium", /* 00 */ 589 "high", /* 01 */ 590 "rsv", /* 10 */ 591 "low" /* 11 */ 592 }; 593 594 return rtpref_str[((v & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff]; 595 } 596 597 static const char * 598 get_lifetime(uint32_t v) 599 { 600 static char buf[20]; 601 602 if (v == (uint32_t)~0UL) 603 return "infinity"; 604 else { 605 snprintf(buf, sizeof(buf), "%us", v); 606 return buf; 607 } 608 } 609 610 static void 611 print_lladdr(netdissect_options *ndo, const uint8_t *p, size_t l) 612 { 613 const uint8_t *ep, *q; 614 615 q = p; 616 ep = p + l; 617 while (l > 0 && q < ep) { 618 if (q > p) 619 ND_PRINT((ndo,":")); 620 ND_PRINT((ndo,"%02x", *q++)); 621 l--; 622 } 623 } 624 625 static int icmp6_cksum(const struct ip6_hdr *ip6, const struct icmp6_hdr *icp, 626 u_int len) 627 { 628 return nextproto6_cksum(ip6, (const uint8_t *)(void *)icp, len, len, 629 IPPROTO_ICMPV6); 630 } 631 632 const struct tok rpl_mop_values[] = { 633 { RPL_DIO_NONSTORING, "nonstoring"}, 634 { RPL_DIO_STORING, "storing"}, 635 { RPL_DIO_NONSTORING_MULTICAST, "nonstoring-multicast"}, 636 { RPL_DIO_STORING_MULTICAST, "storing-multicast"}, 637 { 0, NULL}, 638 }; 639 640 const struct tok rpl_subopt_values[] = { 641 { RPL_OPT_PAD0, "pad0"}, 642 { RPL_OPT_PADN, "padN"}, 643 { RPL_DIO_METRICS, "metrics"}, 644 { RPL_DIO_ROUTINGINFO, "routinginfo"}, 645 { RPL_DIO_CONFIG, "config"}, 646 { RPL_DAO_RPLTARGET, "rpltarget"}, 647 { RPL_DAO_TRANSITINFO, "transitinfo"}, 648 { RPL_DIO_DESTPREFIX, "destprefix"}, 649 { RPL_DAO_RPLTARGET_DESC, "rpltargetdesc"}, 650 { 0, NULL}, 651 }; 652 653 static void 654 rpl_format_dagid(char dagid_str[65], const u_char *dagid) 655 { 656 char *d = dagid_str; 657 int i; 658 659 for(i=0;i<16;i++) { 660 if(isprint(dagid[i])) { 661 *d++ = dagid[i]; 662 } else { 663 snprintf(d,5,"0x%02x", dagid[i]); /* 4 + null char */ 664 d += 4; 665 } 666 } 667 *d++ = '\0'; 668 } 669 670 static void 671 rpl_dio_printopt(netdissect_options *ndo, 672 const struct rpl_dio_genoption *opt, 673 u_int length) 674 { 675 if(length < RPL_DIO_GENOPTION_LEN) return; 676 length -= RPL_DIO_GENOPTION_LEN; 677 678 ND_TCHECK(opt->rpl_dio_len); 679 680 while((opt->rpl_dio_type == RPL_OPT_PAD0 && 681 (u_char *)opt < ndo->ndo_snapend) || 682 ND_TTEST2(*opt,(opt->rpl_dio_len+2))) { 683 684 unsigned int optlen = opt->rpl_dio_len+2; 685 if(opt->rpl_dio_type == RPL_OPT_PAD0) { 686 optlen = 1; 687 ND_PRINT((ndo, " opt:pad0")); 688 } else { 689 ND_PRINT((ndo, " opt:%s len:%u ", 690 tok2str(rpl_subopt_values, "%subopt:%u", opt->rpl_dio_type), 691 optlen)); 692 if(ndo->ndo_vflag > 2) { 693 unsigned int paylen = opt->rpl_dio_len; 694 if(paylen > length) paylen = length; 695 hex_print(ndo, 696 " ", 697 ((uint8_t *)opt) + RPL_DIO_GENOPTION_LEN, /* content of DIO option */ 698 paylen); 699 } 700 } 701 opt = (struct rpl_dio_genoption *)(((char *)opt) + optlen); 702 length -= optlen; 703 } 704 return; 705 trunc: 706 ND_PRINT((ndo," [|truncated]")); 707 return; 708 } 709 710 static void 711 rpl_dio_print(netdissect_options *ndo, 712 const u_char *bp, u_int length) 713 { 714 const struct nd_rpl_dio *dio = (struct nd_rpl_dio *)bp; 715 char dagid_str[65]; 716 717 ND_TCHECK(*dio); 718 rpl_format_dagid(dagid_str, dio->rpl_dagid); 719 720 ND_PRINT((ndo, " [dagid:%s,seq:%u,instance:%u,rank:%u,%smop:%s,prf:%u]", 721 dagid_str, 722 dio->rpl_dtsn, 723 dio->rpl_instanceid, 724 EXTRACT_16BITS(&dio->rpl_dagrank), 725 RPL_DIO_GROUNDED(dio->rpl_mopprf) ? "grounded,":"", 726 tok2str(rpl_mop_values, "mop%u", RPL_DIO_MOP(dio->rpl_mopprf)), 727 RPL_DIO_PRF(dio->rpl_mopprf))); 728 729 if(ndo->ndo_vflag > 1) { 730 struct rpl_dio_genoption *opt = (struct rpl_dio_genoption *)&dio[1]; 731 rpl_dio_printopt(ndo, opt, length); 732 } 733 return; 734 trunc: 735 ND_PRINT((ndo," [|truncated]")); 736 return; 737 } 738 739 static void 740 rpl_dao_print(netdissect_options *ndo, 741 const u_char *bp, u_int length) 742 { 743 const struct nd_rpl_dao *dao = (struct nd_rpl_dao *)bp; 744 char dagid_str[65]; 745 746 ND_TCHECK(*dao); 747 if (length < ND_RPL_DAO_MIN_LEN) 748 goto tooshort; 749 750 strcpy(dagid_str,"<elided>"); 751 bp += ND_RPL_DAO_MIN_LEN; 752 length -= ND_RPL_DAO_MIN_LEN; 753 if(RPL_DAO_D(dao->rpl_flags)) { 754 ND_TCHECK2(dao->rpl_dagid, DAGID_LEN); 755 if (length < DAGID_LEN) 756 goto tooshort; 757 rpl_format_dagid(dagid_str, dao->rpl_dagid); 758 bp += DAGID_LEN; 759 length -= DAGID_LEN; 760 } 761 762 ND_PRINT((ndo, " [dagid:%s,seq:%u,instance:%u%s%s,%02x]", 763 dagid_str, 764 dao->rpl_daoseq, 765 dao->rpl_instanceid, 766 RPL_DAO_K(dao->rpl_flags) ? ",acK":"", 767 RPL_DAO_D(dao->rpl_flags) ? ",Dagid":"", 768 dao->rpl_flags)); 769 770 if(ndo->ndo_vflag > 1) { 771 const struct rpl_dio_genoption *opt = (struct rpl_dio_genoption *)bp; 772 rpl_dio_printopt(ndo, opt, length); 773 } 774 return; 775 776 trunc: 777 ND_PRINT((ndo," [|truncated]")); 778 return; 779 780 tooshort: 781 ND_PRINT((ndo," [|length too short]")); 782 return; 783 } 784 785 static void 786 rpl_daoack_print(netdissect_options *ndo, 787 const u_char *bp, u_int length) 788 { 789 const struct nd_rpl_daoack *daoack = (struct nd_rpl_daoack *)bp; 790 char dagid_str[65]; 791 792 ND_TCHECK2(*daoack, ND_RPL_DAOACK_MIN_LEN); 793 if (length < ND_RPL_DAOACK_MIN_LEN) 794 goto tooshort; 795 796 strcpy(dagid_str,"<elided>"); 797 bp += ND_RPL_DAOACK_MIN_LEN; 798 length -= ND_RPL_DAOACK_MIN_LEN; 799 if(RPL_DAOACK_D(daoack->rpl_flags)) { 800 ND_TCHECK2(daoack->rpl_dagid, 16); 801 if (length < DAGID_LEN) 802 goto tooshort; 803 rpl_format_dagid(dagid_str, daoack->rpl_dagid); 804 bp += DAGID_LEN; 805 length -= DAGID_LEN; 806 } 807 808 ND_PRINT((ndo, " [dagid:%s,seq:%u,instance:%u,status:%u]", 809 dagid_str, 810 daoack->rpl_daoseq, 811 daoack->rpl_instanceid, 812 daoack->rpl_status)); 813 814 /* no officially defined options for DAOACK, but print any we find */ 815 if(ndo->ndo_vflag > 1) { 816 const struct rpl_dio_genoption *opt = (struct rpl_dio_genoption *)bp; 817 rpl_dio_printopt(ndo, opt, length); 818 } 819 return; 820 821 trunc: 822 ND_PRINT((ndo," [|dao-truncated]")); 823 return; 824 825 tooshort: 826 ND_PRINT((ndo," [|dao-length too short]")); 827 return; 828 } 829 830 static void 831 rpl_print(netdissect_options *ndo, 832 const struct icmp6_hdr *hdr, 833 const u_char *bp, u_int length) 834 { 835 int secured = hdr->icmp6_code & 0x80; 836 int basecode= hdr->icmp6_code & 0x7f; 837 838 if(secured) { 839 ND_PRINT((ndo, ", (SEC) [worktodo]")); 840 /* XXX 841 * the next header pointer needs to move forward to 842 * skip the secure part. 843 */ 844 return; 845 } else { 846 ND_PRINT((ndo, ", (CLR)")); 847 } 848 849 switch(basecode) { 850 case ND_RPL_DAG_IS: 851 ND_PRINT((ndo, "DODAG Information Solicitation")); 852 if(ndo->ndo_vflag) { 853 } 854 break; 855 case ND_RPL_DAG_IO: 856 ND_PRINT((ndo, "DODAG Information Object")); 857 if(ndo->ndo_vflag) { 858 rpl_dio_print(ndo, bp, length); 859 } 860 break; 861 case ND_RPL_DAO: 862 ND_PRINT((ndo, "Destination Advertisement Object")); 863 if(ndo->ndo_vflag) { 864 rpl_dao_print(ndo, bp, length); 865 } 866 break; 867 case ND_RPL_DAO_ACK: 868 ND_PRINT((ndo, "Destination Advertisement Object Ack")); 869 if(ndo->ndo_vflag) { 870 rpl_daoack_print(ndo, bp, length); 871 } 872 break; 873 default: 874 ND_PRINT((ndo, "RPL message, unknown code %u",hdr->icmp6_code)); 875 break; 876 } 877 return; 878 879 #if 0 880 trunc: 881 ND_PRINT((ndo," [|truncated]")); 882 return; 883 #endif 884 885 } 886 887 888 void 889 icmp6_print(netdissect_options *ndo, 890 const u_char *bp, u_int length, const u_char *bp2, int fragmented) 891 { 892 const struct icmp6_hdr *dp; 893 const struct ip6_hdr *ip; 894 const struct ip6_hdr *oip; 895 const struct udphdr *ouh; 896 int dport; 897 const u_char *ep; 898 u_int prot; 899 900 dp = (struct icmp6_hdr *)bp; 901 ip = (struct ip6_hdr *)bp2; 902 oip = (struct ip6_hdr *)(dp + 1); 903 /* 'ep' points to the end of available data. */ 904 ep = ndo->ndo_snapend; 905 906 ND_TCHECK(dp->icmp6_cksum); 907 908 if (ndo->ndo_vflag && !fragmented) { 909 uint16_t sum, udp_sum; 910 911 if (ND_TTEST2(bp[0], length)) { 912 udp_sum = EXTRACT_16BITS(&dp->icmp6_cksum); 913 sum = icmp6_cksum(ip, dp, length); 914 if (sum != 0) 915 ND_PRINT((ndo,"[bad icmp6 cksum 0x%04x -> 0x%04x!] ", 916 udp_sum, 917 in_cksum_shouldbe(udp_sum, sum))); 918 else 919 ND_PRINT((ndo,"[icmp6 sum ok] ")); 920 } 921 } 922 923 ND_PRINT((ndo,"ICMP6, %s", tok2str(icmp6_type_values,"unknown icmp6 type (%u)",dp->icmp6_type))); 924 925 /* display cosmetics: print the packet length for printer that use the vflag now */ 926 if (ndo->ndo_vflag && (dp->icmp6_type == ND_ROUTER_SOLICIT || 927 dp->icmp6_type == ND_ROUTER_ADVERT || 928 dp->icmp6_type == ND_NEIGHBOR_ADVERT || 929 dp->icmp6_type == ND_NEIGHBOR_SOLICIT || 930 dp->icmp6_type == ND_REDIRECT || 931 dp->icmp6_type == ICMP6_HADISCOV_REPLY || 932 dp->icmp6_type == ICMP6_MOBILEPREFIX_ADVERT )) 933 ND_PRINT((ndo,", length %u", length)); 934 935 switch (dp->icmp6_type) { 936 case ICMP6_DST_UNREACH: 937 ND_TCHECK(oip->ip6_dst); 938 ND_PRINT((ndo,", %s", tok2str(icmp6_dst_unreach_code_values,"unknown unreach code (%u)",dp->icmp6_code))); 939 switch (dp->icmp6_code) { 940 941 case ICMP6_DST_UNREACH_NOROUTE: /* fall through */ 942 case ICMP6_DST_UNREACH_ADMIN: 943 case ICMP6_DST_UNREACH_ADDR: 944 ND_PRINT((ndo," %s",ip6addr_string(ndo, &oip->ip6_dst))); 945 break; 946 case ICMP6_DST_UNREACH_BEYONDSCOPE: 947 ND_PRINT((ndo," %s, source address %s", 948 ip6addr_string(ndo, &oip->ip6_dst), 949 ip6addr_string(ndo, &oip->ip6_src))); 950 break; 951 case ICMP6_DST_UNREACH_NOPORT: 952 if ((ouh = get_upperlayer(ndo, (u_char *)oip, &prot)) 953 == NULL) 954 goto trunc; 955 956 dport = EXTRACT_16BITS(&ouh->uh_dport); 957 switch (prot) { 958 case IPPROTO_TCP: 959 ND_PRINT((ndo,", %s tcp port %s", 960 ip6addr_string(ndo, &oip->ip6_dst), 961 tcpport_string(dport))); 962 break; 963 case IPPROTO_UDP: 964 ND_PRINT((ndo,", %s udp port %s", 965 ip6addr_string(ndo, &oip->ip6_dst), 966 udpport_string(dport))); 967 break; 968 default: 969 ND_PRINT((ndo,", %s protocol %d port %d unreachable", 970 ip6addr_string(ndo, &oip->ip6_dst), 971 oip->ip6_nxt, dport)); 972 break; 973 } 974 break; 975 default: 976 if (ndo->ndo_vflag <= 1) { 977 print_unknown_data(ndo, bp,"\n\t",length); 978 return; 979 } 980 break; 981 } 982 break; 983 case ICMP6_PACKET_TOO_BIG: 984 ND_TCHECK(dp->icmp6_mtu); 985 ND_PRINT((ndo,", mtu %u", EXTRACT_32BITS(&dp->icmp6_mtu))); 986 break; 987 case ICMP6_TIME_EXCEEDED: 988 ND_TCHECK(oip->ip6_dst); 989 switch (dp->icmp6_code) { 990 case ICMP6_TIME_EXCEED_TRANSIT: 991 ND_PRINT((ndo," for %s", 992 ip6addr_string(ndo, &oip->ip6_dst))); 993 break; 994 case ICMP6_TIME_EXCEED_REASSEMBLY: 995 ND_PRINT((ndo," (reassembly)")); 996 break; 997 default: 998 ND_PRINT((ndo,", unknown code (%u)", dp->icmp6_code)); 999 break; 1000 } 1001 break; 1002 case ICMP6_PARAM_PROB: 1003 ND_TCHECK(oip->ip6_dst); 1004 switch (dp->icmp6_code) { 1005 case ICMP6_PARAMPROB_HEADER: 1006 ND_PRINT((ndo,", erroneous - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr))); 1007 break; 1008 case ICMP6_PARAMPROB_NEXTHEADER: 1009 ND_PRINT((ndo,", next header - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr))); 1010 break; 1011 case ICMP6_PARAMPROB_OPTION: 1012 ND_PRINT((ndo,", option - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr))); 1013 break; 1014 default: 1015 ND_PRINT((ndo,", code-#%d", 1016 dp->icmp6_code)); 1017 break; 1018 } 1019 break; 1020 case ICMP6_ECHO_REQUEST: 1021 case ICMP6_ECHO_REPLY: 1022 ND_TCHECK(dp->icmp6_seq); 1023 ND_PRINT((ndo,", seq %u", EXTRACT_16BITS(&dp->icmp6_seq))); 1024 break; 1025 case ICMP6_MEMBERSHIP_QUERY: 1026 if (length == MLD_MINLEN) { 1027 mld6_print(ndo, (const u_char *)dp); 1028 } else if (length >= MLDV2_MINLEN) { 1029 ND_PRINT((ndo," v2")); 1030 mldv2_query_print(ndo, (const u_char *)dp, length); 1031 } else { 1032 ND_PRINT((ndo," unknown-version (len %u) ", length)); 1033 } 1034 break; 1035 case ICMP6_MEMBERSHIP_REPORT: 1036 mld6_print(ndo, (const u_char *)dp); 1037 break; 1038 case ICMP6_MEMBERSHIP_REDUCTION: 1039 mld6_print(ndo, (const u_char *)dp); 1040 break; 1041 case ND_ROUTER_SOLICIT: 1042 #define RTSOLLEN 8 1043 if (ndo->ndo_vflag) { 1044 icmp6_opt_print(ndo, (const u_char *)dp + RTSOLLEN, 1045 length - RTSOLLEN); 1046 } 1047 break; 1048 case ND_ROUTER_ADVERT: 1049 #define RTADVLEN 16 1050 if (ndo->ndo_vflag) { 1051 struct nd_router_advert *p; 1052 1053 p = (struct nd_router_advert *)dp; 1054 ND_TCHECK(p->nd_ra_retransmit); 1055 ND_PRINT((ndo,"\n\thop limit %u, Flags [%s]" \ 1056 ", pref %s, router lifetime %us, reachable time %us, retrans time %us", 1057 (u_int)p->nd_ra_curhoplimit, 1058 bittok2str(icmp6_opt_ra_flag_values,"none",(p->nd_ra_flags_reserved)), 1059 get_rtpref(p->nd_ra_flags_reserved), 1060 EXTRACT_16BITS(&p->nd_ra_router_lifetime), 1061 EXTRACT_32BITS(&p->nd_ra_reachable), 1062 EXTRACT_32BITS(&p->nd_ra_retransmit))); 1063 1064 icmp6_opt_print(ndo, (const u_char *)dp + RTADVLEN, 1065 length - RTADVLEN); 1066 } 1067 break; 1068 case ND_NEIGHBOR_SOLICIT: 1069 { 1070 struct nd_neighbor_solicit *p; 1071 p = (struct nd_neighbor_solicit *)dp; 1072 ND_TCHECK(p->nd_ns_target); 1073 ND_PRINT((ndo,", who has %s", ip6addr_string(ndo, &p->nd_ns_target))); 1074 if (ndo->ndo_vflag) { 1075 #define NDSOLLEN 24 1076 icmp6_opt_print(ndo, (const u_char *)dp + NDSOLLEN, 1077 length - NDSOLLEN); 1078 } 1079 } 1080 break; 1081 case ND_NEIGHBOR_ADVERT: 1082 { 1083 struct nd_neighbor_advert *p; 1084 1085 p = (struct nd_neighbor_advert *)dp; 1086 ND_TCHECK(p->nd_na_target); 1087 ND_PRINT((ndo,", tgt is %s", 1088 ip6addr_string(ndo, &p->nd_na_target))); 1089 if (ndo->ndo_vflag) { 1090 ND_PRINT((ndo,", Flags [%s]", 1091 bittok2str(icmp6_nd_na_flag_values, 1092 "none", 1093 EXTRACT_32BITS(&p->nd_na_flags_reserved)))); 1094 #define NDADVLEN 24 1095 icmp6_opt_print(ndo, (const u_char *)dp + NDADVLEN, 1096 length - NDADVLEN); 1097 #undef NDADVLEN 1098 } 1099 } 1100 break; 1101 case ND_REDIRECT: 1102 #define RDR(i) ((struct nd_redirect *)(i)) 1103 ND_TCHECK(RDR(dp)->nd_rd_dst); 1104 ND_PRINT((ndo,", %s", getname6(ndo, (const u_char *)&RDR(dp)->nd_rd_dst))); 1105 ND_TCHECK(RDR(dp)->nd_rd_target); 1106 ND_PRINT((ndo," to %s", 1107 getname6(ndo, (const u_char*)&RDR(dp)->nd_rd_target))); 1108 #define REDIRECTLEN 40 1109 if (ndo->ndo_vflag) { 1110 icmp6_opt_print(ndo, (const u_char *)dp + REDIRECTLEN, 1111 length - REDIRECTLEN); 1112 } 1113 break; 1114 #undef REDIRECTLEN 1115 #undef RDR 1116 case ICMP6_ROUTER_RENUMBERING: 1117 icmp6_rrenum_print(ndo, bp, ep); 1118 break; 1119 case ICMP6_NI_QUERY: 1120 case ICMP6_NI_REPLY: 1121 icmp6_nodeinfo_print(ndo, length, bp, ep); 1122 break; 1123 case IND_SOLICIT: 1124 case IND_ADVERT: 1125 break; 1126 case ICMP6_V2_MEMBERSHIP_REPORT: 1127 mldv2_report_print(ndo, (const u_char *) dp, length); 1128 break; 1129 case ICMP6_MOBILEPREFIX_SOLICIT: /* fall through */ 1130 case ICMP6_HADISCOV_REQUEST: 1131 ND_TCHECK(dp->icmp6_data16[0]); 1132 ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0]))); 1133 break; 1134 case ICMP6_HADISCOV_REPLY: 1135 if (ndo->ndo_vflag) { 1136 struct in6_addr *in6; 1137 u_char *cp; 1138 1139 ND_TCHECK(dp->icmp6_data16[0]); 1140 ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0]))); 1141 cp = (u_char *)dp + length; 1142 in6 = (struct in6_addr *)(dp + 1); 1143 for (; (u_char *)in6 < cp; in6++) { 1144 ND_TCHECK(*in6); 1145 ND_PRINT((ndo,", %s", ip6addr_string(ndo, in6))); 1146 } 1147 } 1148 break; 1149 case ICMP6_MOBILEPREFIX_ADVERT: 1150 if (ndo->ndo_vflag) { 1151 ND_TCHECK(dp->icmp6_data16[0]); 1152 ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0]))); 1153 if (dp->icmp6_data16[1] & 0xc0) 1154 ND_PRINT((ndo," ")); 1155 if (dp->icmp6_data16[1] & 0x80) 1156 ND_PRINT((ndo,"M")); 1157 if (dp->icmp6_data16[1] & 0x40) 1158 ND_PRINT((ndo,"O")); 1159 #define MPADVLEN 8 1160 icmp6_opt_print(ndo, (const u_char *)dp + MPADVLEN, 1161 length - MPADVLEN); 1162 } 1163 break; 1164 case ND_RPL_MESSAGE: 1165 /* plus 4, because struct icmp6_hdr contains 4 bytes of icmp payload */ 1166 rpl_print(ndo, dp, &dp->icmp6_data8[0], length-sizeof(struct icmp6_hdr)+4); 1167 break; 1168 default: 1169 ND_PRINT((ndo,", length %u", length)); 1170 if (ndo->ndo_vflag <= 1) 1171 print_unknown_data(ndo, bp,"\n\t", length); 1172 return; 1173 } 1174 if (!ndo->ndo_vflag) 1175 ND_PRINT((ndo,", length %u", length)); 1176 return; 1177 trunc: 1178 ND_PRINT((ndo, "[|icmp6]")); 1179 } 1180 1181 static const struct udphdr * 1182 get_upperlayer(netdissect_options *ndo, const u_char *bp, u_int *prot) 1183 { 1184 const u_char *ep; 1185 const struct ip6_hdr *ip6 = (struct ip6_hdr *)bp; 1186 const struct udphdr *uh; 1187 const struct ip6_hbh *hbh; 1188 const struct ip6_frag *fragh; 1189 const struct ah *ah; 1190 u_int nh; 1191 int hlen; 1192 1193 /* 'ep' points to the end of available data. */ 1194 ep = ndo->ndo_snapend; 1195 1196 if (!ND_TTEST(ip6->ip6_nxt)) 1197 return NULL; 1198 1199 nh = ip6->ip6_nxt; 1200 hlen = sizeof(struct ip6_hdr); 1201 1202 while (bp < ep) { 1203 bp += hlen; 1204 1205 switch(nh) { 1206 case IPPROTO_UDP: 1207 case IPPROTO_TCP: 1208 uh = (struct udphdr *)bp; 1209 if (ND_TTEST(uh->uh_dport)) { 1210 *prot = nh; 1211 return(uh); 1212 } 1213 else 1214 return(NULL); 1215 /* NOTREACHED */ 1216 1217 case IPPROTO_HOPOPTS: 1218 case IPPROTO_DSTOPTS: 1219 case IPPROTO_ROUTING: 1220 hbh = (struct ip6_hbh *)bp; 1221 if (!ND_TTEST(hbh->ip6h_len)) 1222 return(NULL); 1223 nh = hbh->ip6h_nxt; 1224 hlen = (hbh->ip6h_len + 1) << 3; 1225 break; 1226 1227 case IPPROTO_FRAGMENT: /* this should be odd, but try anyway */ 1228 fragh = (struct ip6_frag *)bp; 1229 if (!ND_TTEST(fragh->ip6f_offlg)) 1230 return(NULL); 1231 /* fragments with non-zero offset are meaningless */ 1232 if ((EXTRACT_16BITS(&fragh->ip6f_offlg) & IP6F_OFF_MASK) != 0) 1233 return(NULL); 1234 nh = fragh->ip6f_nxt; 1235 hlen = sizeof(struct ip6_frag); 1236 break; 1237 1238 case IPPROTO_AH: 1239 ah = (struct ah *)bp; 1240 if (!ND_TTEST(ah->ah_len)) 1241 return(NULL); 1242 nh = ah->ah_nxt; 1243 hlen = (ah->ah_len + 2) << 2; 1244 break; 1245 1246 default: /* unknown or undecodable header */ 1247 *prot = nh; /* meaningless, but set here anyway */ 1248 return(NULL); 1249 } 1250 } 1251 1252 return(NULL); /* should be notreached, though */ 1253 } 1254 1255 static void 1256 icmp6_opt_print(netdissect_options *ndo, const u_char *bp, int resid) 1257 { 1258 const struct nd_opt_hdr *op; 1259 const struct nd_opt_prefix_info *opp; 1260 const struct nd_opt_mtu *opm; 1261 const struct nd_opt_rdnss *oprd; 1262 const struct nd_opt_dnssl *opds; 1263 const struct nd_opt_advinterval *opa; 1264 const struct nd_opt_homeagent_info *oph; 1265 const struct nd_opt_route_info *opri; 1266 const u_char *cp, *ep, *domp; 1267 struct in6_addr in6, *in6p; 1268 size_t l; 1269 u_int i; 1270 1271 #define ECHECK(var) if ((u_char *)&(var) > ep - sizeof(var)) return 1272 1273 cp = bp; 1274 /* 'ep' points to the end of available data. */ 1275 ep = ndo->ndo_snapend; 1276 1277 while (cp < ep) { 1278 op = (struct nd_opt_hdr *)cp; 1279 1280 ECHECK(op->nd_opt_len); 1281 if (resid <= 0) 1282 return; 1283 if (op->nd_opt_len == 0) 1284 goto trunc; 1285 if (cp + (op->nd_opt_len << 3) > ep) 1286 goto trunc; 1287 1288 ND_PRINT((ndo,"\n\t %s option (%u), length %u (%u): ", 1289 tok2str(icmp6_opt_values, "unknown", op->nd_opt_type), 1290 op->nd_opt_type, 1291 op->nd_opt_len << 3, 1292 op->nd_opt_len)); 1293 1294 switch (op->nd_opt_type) { 1295 case ND_OPT_SOURCE_LINKADDR: 1296 l = (op->nd_opt_len << 3) - 2; 1297 print_lladdr(ndo, cp + 2, l); 1298 break; 1299 case ND_OPT_TARGET_LINKADDR: 1300 l = (op->nd_opt_len << 3) - 2; 1301 print_lladdr(ndo, cp + 2, l); 1302 break; 1303 case ND_OPT_PREFIX_INFORMATION: 1304 opp = (struct nd_opt_prefix_info *)op; 1305 ND_TCHECK(opp->nd_opt_pi_prefix); 1306 ND_PRINT((ndo,"%s/%u%s, Flags [%s], valid time %s", 1307 ip6addr_string(ndo, &opp->nd_opt_pi_prefix), 1308 opp->nd_opt_pi_prefix_len, 1309 (op->nd_opt_len != 4) ? "badlen" : "", 1310 bittok2str(icmp6_opt_pi_flag_values, "none", opp->nd_opt_pi_flags_reserved), 1311 get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_valid_time)))); 1312 ND_PRINT((ndo,", pref. time %s", get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_preferred_time)))); 1313 break; 1314 case ND_OPT_REDIRECTED_HEADER: 1315 print_unknown_data(ndo, bp,"\n\t ",op->nd_opt_len<<3); 1316 /* xxx */ 1317 break; 1318 case ND_OPT_MTU: 1319 opm = (struct nd_opt_mtu *)op; 1320 ND_TCHECK(opm->nd_opt_mtu_mtu); 1321 ND_PRINT((ndo," %u%s", 1322 EXTRACT_32BITS(&opm->nd_opt_mtu_mtu), 1323 (op->nd_opt_len != 1) ? "bad option length" : "" )); 1324 break; 1325 case ND_OPT_RDNSS: 1326 oprd = (struct nd_opt_rdnss *)op; 1327 l = (op->nd_opt_len - 1) / 2; 1328 ND_PRINT((ndo," lifetime %us,", 1329 EXTRACT_32BITS(&oprd->nd_opt_rdnss_lifetime))); 1330 for (i = 0; i < l; i++) { 1331 ND_TCHECK(oprd->nd_opt_rdnss_addr[i]); 1332 ND_PRINT((ndo," addr: %s", 1333 ip6addr_string(ndo, &oprd->nd_opt_rdnss_addr[i]))); 1334 } 1335 break; 1336 case ND_OPT_DNSSL: 1337 opds = (struct nd_opt_dnssl *)op; 1338 ND_PRINT((ndo," lifetime %us, domain(s):", 1339 EXTRACT_32BITS(&opds->nd_opt_dnssl_lifetime))); 1340 domp = cp + 8; /* domain names, variable-sized, RFC1035-encoded */ 1341 while (domp < cp + (op->nd_opt_len << 3) && *domp != '\0') 1342 { 1343 ND_PRINT((ndo, " ")); 1344 if ((domp = ns_nprint (ndo, domp, bp)) == NULL) 1345 goto trunc; 1346 } 1347 break; 1348 case ND_OPT_ADVINTERVAL: 1349 opa = (struct nd_opt_advinterval *)op; 1350 ND_TCHECK(opa->nd_opt_adv_interval); 1351 ND_PRINT((ndo," %ums", EXTRACT_32BITS(&opa->nd_opt_adv_interval))); 1352 break; 1353 case ND_OPT_HOMEAGENT_INFO: 1354 oph = (struct nd_opt_homeagent_info *)op; 1355 ND_TCHECK(oph->nd_opt_hai_lifetime); 1356 ND_PRINT((ndo," preference %u, lifetime %u", 1357 EXTRACT_16BITS(&oph->nd_opt_hai_preference), 1358 EXTRACT_16BITS(&oph->nd_opt_hai_lifetime))); 1359 break; 1360 case ND_OPT_ROUTE_INFO: 1361 opri = (struct nd_opt_route_info *)op; 1362 ND_TCHECK(opri->nd_opt_rti_lifetime); 1363 memset(&in6, 0, sizeof(in6)); 1364 in6p = (struct in6_addr *)(opri + 1); 1365 switch (op->nd_opt_len) { 1366 case 1: 1367 break; 1368 case 2: 1369 ND_TCHECK2(*in6p, 8); 1370 memcpy(&in6, opri + 1, 8); 1371 break; 1372 case 3: 1373 ND_TCHECK(*in6p); 1374 memcpy(&in6, opri + 1, sizeof(in6)); 1375 break; 1376 default: 1377 goto trunc; 1378 } 1379 ND_PRINT((ndo," %s/%u", ip6addr_string(ndo, &in6), 1380 opri->nd_opt_rti_prefixlen)); 1381 ND_PRINT((ndo,", pref=%s", get_rtpref(opri->nd_opt_rti_flags))); 1382 ND_PRINT((ndo,", lifetime=%s", 1383 get_lifetime(EXTRACT_32BITS(&opri->nd_opt_rti_lifetime)))); 1384 break; 1385 default: 1386 if (ndo->ndo_vflag <= 1) { 1387 print_unknown_data(ndo,cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */ 1388 return; 1389 } 1390 break; 1391 } 1392 /* do we want to see an additional hexdump ? */ 1393 if (ndo->ndo_vflag> 1) 1394 print_unknown_data(ndo, cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */ 1395 1396 cp += op->nd_opt_len << 3; 1397 resid -= op->nd_opt_len << 3; 1398 } 1399 return; 1400 1401 trunc: 1402 ND_PRINT((ndo, "[ndp opt]")); 1403 return; 1404 #undef ECHECK 1405 } 1406 1407 static void 1408 mld6_print(netdissect_options *ndo, const u_char *bp) 1409 { 1410 const struct mld6_hdr *mp = (struct mld6_hdr *)bp; 1411 const u_char *ep; 1412 1413 /* 'ep' points to the end of available data. */ 1414 ep = ndo->ndo_snapend; 1415 1416 if ((u_char *)mp + sizeof(*mp) > ep) 1417 return; 1418 1419 ND_PRINT((ndo,"max resp delay: %d ", EXTRACT_16BITS(&mp->mld6_maxdelay))); 1420 ND_PRINT((ndo,"addr: %s", ip6addr_string(ndo, &mp->mld6_addr))); 1421 } 1422 1423 static void 1424 mldv2_report_print(netdissect_options *ndo, const u_char *bp, u_int len) 1425 { 1426 struct icmp6_hdr *icp = (struct icmp6_hdr *) bp; 1427 u_int group, nsrcs, ngroups; 1428 u_int i, j; 1429 1430 /* Minimum len is 8 */ 1431 if (len < 8) { 1432 ND_PRINT((ndo," [invalid len %d]", len)); 1433 return; 1434 } 1435 1436 ND_TCHECK(icp->icmp6_data16[1]); 1437 ngroups = EXTRACT_16BITS(&icp->icmp6_data16[1]); 1438 ND_PRINT((ndo,", %d group record(s)", ngroups)); 1439 if (ndo->ndo_vflag > 0) { 1440 /* Print the group records */ 1441 group = 8; 1442 for (i = 0; i < ngroups; i++) { 1443 /* type(1) + auxlen(1) + numsrc(2) + grp(16) */ 1444 if (len < group + 20) { 1445 ND_PRINT((ndo," [invalid number of groups]")); 1446 return; 1447 } 1448 ND_TCHECK2(bp[group + 4], sizeof(struct in6_addr)); 1449 ND_PRINT((ndo," [gaddr %s", ip6addr_string(ndo, &bp[group + 4]))); 1450 ND_PRINT((ndo," %s", tok2str(mldv2report2str, " [v2-report-#%d]", 1451 bp[group]))); 1452 nsrcs = (bp[group + 2] << 8) + bp[group + 3]; 1453 /* Check the number of sources and print them */ 1454 if (len < group + 20 + (nsrcs * sizeof(struct in6_addr))) { 1455 ND_PRINT((ndo," [invalid number of sources %d]", nsrcs)); 1456 return; 1457 } 1458 if (ndo->ndo_vflag == 1) 1459 ND_PRINT((ndo,", %d source(s)", nsrcs)); 1460 else { 1461 /* Print the sources */ 1462 ND_PRINT((ndo," {")); 1463 for (j = 0; j < nsrcs; j++) { 1464 ND_TCHECK2(bp[group + 20 + j * sizeof(struct in6_addr)], 1465 sizeof(struct in6_addr)); 1466 ND_PRINT((ndo," %s", ip6addr_string(ndo, &bp[group + 20 + j * sizeof(struct in6_addr)]))); 1467 } 1468 ND_PRINT((ndo," }")); 1469 } 1470 /* Next group record */ 1471 group += 20 + nsrcs * sizeof(struct in6_addr); 1472 ND_PRINT((ndo,"]")); 1473 } 1474 } 1475 return; 1476 trunc: 1477 ND_PRINT((ndo,"[|icmp6]")); 1478 return; 1479 } 1480 1481 static void 1482 mldv2_query_print(netdissect_options *ndo, const u_char *bp, u_int len) 1483 { 1484 struct icmp6_hdr *icp = (struct icmp6_hdr *) bp; 1485 u_int mrc; 1486 int mrt, qqi; 1487 u_int nsrcs; 1488 register u_int i; 1489 1490 /* Minimum len is 28 */ 1491 if (len < 28) { 1492 ND_PRINT((ndo," [invalid len %d]", len)); 1493 return; 1494 } 1495 ND_TCHECK(icp->icmp6_data16[0]); 1496 mrc = EXTRACT_16BITS(&icp->icmp6_data16[0]); 1497 if (mrc < 32768) { 1498 mrt = mrc; 1499 } else { 1500 mrt = ((mrc & 0x0fff) | 0x1000) << (((mrc & 0x7000) >> 12) + 3); 1501 } 1502 if (ndo->ndo_vflag) { 1503 ND_PRINT((ndo," [max resp delay=%d]", mrt)); 1504 } 1505 ND_TCHECK2(bp[8], sizeof(struct in6_addr)); 1506 ND_PRINT((ndo," [gaddr %s", ip6addr_string(ndo, &bp[8]))); 1507 1508 if (ndo->ndo_vflag) { 1509 ND_TCHECK(bp[25]); 1510 if (bp[24] & 0x08) { 1511 ND_PRINT((ndo," sflag")); 1512 } 1513 if (bp[24] & 0x07) { 1514 ND_PRINT((ndo," robustness=%d", bp[24] & 0x07)); 1515 } 1516 if (bp[25] < 128) { 1517 qqi = bp[25]; 1518 } else { 1519 qqi = ((bp[25] & 0x0f) | 0x10) << (((bp[25] & 0x70) >> 4) + 3); 1520 } 1521 ND_PRINT((ndo," qqi=%d", qqi)); 1522 } 1523 1524 ND_TCHECK2(bp[26], 2); 1525 nsrcs = EXTRACT_16BITS(&bp[26]); 1526 if (nsrcs > 0) { 1527 if (len < 28 + nsrcs * sizeof(struct in6_addr)) 1528 ND_PRINT((ndo," [invalid number of sources]")); 1529 else if (ndo->ndo_vflag > 1) { 1530 ND_PRINT((ndo," {")); 1531 for (i = 0; i < nsrcs; i++) { 1532 ND_TCHECK2(bp[28 + i * sizeof(struct in6_addr)], 1533 sizeof(struct in6_addr)); 1534 ND_PRINT((ndo," %s", ip6addr_string(ndo, &bp[28 + i * sizeof(struct in6_addr)]))); 1535 } 1536 ND_PRINT((ndo," }")); 1537 } else 1538 ND_PRINT((ndo,", %d source(s)", nsrcs)); 1539 } 1540 ND_PRINT((ndo,"]")); 1541 return; 1542 trunc: 1543 ND_PRINT((ndo,"[|icmp6]")); 1544 return; 1545 } 1546 1547 static void 1548 dnsname_print(netdissect_options *ndo, const u_char *cp, const u_char *ep) 1549 { 1550 int i; 1551 1552 /* DNS name decoding - no decompression */ 1553 ND_PRINT((ndo,", \"")); 1554 while (cp < ep) { 1555 i = *cp++; 1556 if (i) { 1557 if (i > ep - cp) { 1558 ND_PRINT((ndo,"???")); 1559 break; 1560 } 1561 while (i-- && cp < ep) { 1562 safeputchar(ndo, *cp); 1563 cp++; 1564 } 1565 if (cp + 1 < ep && *cp) 1566 ND_PRINT((ndo,".")); 1567 } else { 1568 if (cp == ep) { 1569 /* FQDN */ 1570 ND_PRINT((ndo,".")); 1571 } else if (cp + 1 == ep && *cp == '\0') { 1572 /* truncated */ 1573 } else { 1574 /* invalid */ 1575 ND_PRINT((ndo,"???")); 1576 } 1577 break; 1578 } 1579 } 1580 ND_PRINT((ndo,"\"")); 1581 } 1582 1583 static void 1584 icmp6_nodeinfo_print(netdissect_options *ndo, u_int icmp6len, const u_char *bp, const u_char *ep) 1585 { 1586 const struct icmp6_nodeinfo *ni6; 1587 const struct icmp6_hdr *dp; 1588 const u_char *cp; 1589 size_t siz, i; 1590 int needcomma; 1591 1592 if (ep < bp) 1593 return; 1594 dp = (struct icmp6_hdr *)bp; 1595 ni6 = (struct icmp6_nodeinfo *)bp; 1596 siz = ep - bp; 1597 1598 switch (ni6->ni_type) { 1599 case ICMP6_NI_QUERY: 1600 if (siz == sizeof(*dp) + 4) { 1601 /* KAME who-are-you */ 1602 ND_PRINT((ndo," who-are-you request")); 1603 break; 1604 } 1605 ND_PRINT((ndo," node information query")); 1606 1607 ND_TCHECK2(*dp, sizeof(*ni6)); 1608 ni6 = (struct icmp6_nodeinfo *)dp; 1609 ND_PRINT((ndo," (")); /*)*/ 1610 switch (EXTRACT_16BITS(&ni6->ni_qtype)) { 1611 case NI_QTYPE_NOOP: 1612 ND_PRINT((ndo,"noop")); 1613 break; 1614 case NI_QTYPE_SUPTYPES: 1615 ND_PRINT((ndo,"supported qtypes")); 1616 i = EXTRACT_16BITS(&ni6->ni_flags); 1617 if (i) 1618 ND_PRINT((ndo," [%s]", (i & 0x01) ? "C" : "")); 1619 break; 1620 case NI_QTYPE_FQDN: 1621 ND_PRINT((ndo,"DNS name")); 1622 break; 1623 case NI_QTYPE_NODEADDR: 1624 ND_PRINT((ndo,"node addresses")); 1625 i = ni6->ni_flags; 1626 if (!i) 1627 break; 1628 /* NI_NODEADDR_FLAG_TRUNCATE undefined for query */ 1629 ND_PRINT((ndo," [%s%s%s%s%s%s]", 1630 (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "", 1631 (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "", 1632 (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "", 1633 (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "", 1634 (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "", 1635 (i & NI_NODEADDR_FLAG_ALL) ? "A" : "")); 1636 break; 1637 default: 1638 ND_PRINT((ndo,"unknown")); 1639 break; 1640 } 1641 1642 if (ni6->ni_qtype == NI_QTYPE_NOOP || 1643 ni6->ni_qtype == NI_QTYPE_SUPTYPES) { 1644 if (siz != sizeof(*ni6)) 1645 if (ndo->ndo_vflag) 1646 ND_PRINT((ndo,", invalid len")); 1647 /*(*/ 1648 ND_PRINT((ndo,")")); 1649 break; 1650 } 1651 1652 1653 /* XXX backward compat, icmp-name-lookup-03 */ 1654 if (siz == sizeof(*ni6)) { 1655 ND_PRINT((ndo,", 03 draft")); 1656 /*(*/ 1657 ND_PRINT((ndo,")")); 1658 break; 1659 } 1660 1661 switch (ni6->ni_code) { 1662 case ICMP6_NI_SUBJ_IPV6: 1663 if (!ND_TTEST2(*dp, 1664 sizeof(*ni6) + sizeof(struct in6_addr))) 1665 break; 1666 if (siz != sizeof(*ni6) + sizeof(struct in6_addr)) { 1667 if (ndo->ndo_vflag) 1668 ND_PRINT((ndo,", invalid subject len")); 1669 break; 1670 } 1671 ND_PRINT((ndo,", subject=%s", 1672 getname6(ndo, (const u_char *)(ni6 + 1)))); 1673 break; 1674 case ICMP6_NI_SUBJ_FQDN: 1675 ND_PRINT((ndo,", subject=DNS name")); 1676 cp = (const u_char *)(ni6 + 1); 1677 if (cp[0] == ep - cp - 1) { 1678 /* icmp-name-lookup-03, pascal string */ 1679 if (ndo->ndo_vflag) 1680 ND_PRINT((ndo,", 03 draft")); 1681 cp++; 1682 ND_PRINT((ndo,", \"")); 1683 while (cp < ep) { 1684 safeputchar(ndo, *cp); 1685 cp++; 1686 } 1687 ND_PRINT((ndo,"\"")); 1688 } else 1689 dnsname_print(ndo, cp, ep); 1690 break; 1691 case ICMP6_NI_SUBJ_IPV4: 1692 if (!ND_TTEST2(*dp, sizeof(*ni6) + sizeof(struct in_addr))) 1693 break; 1694 if (siz != sizeof(*ni6) + sizeof(struct in_addr)) { 1695 if (ndo->ndo_vflag) 1696 ND_PRINT((ndo,", invalid subject len")); 1697 break; 1698 } 1699 ND_PRINT((ndo,", subject=%s", 1700 getname(ndo, (const u_char *)(ni6 + 1)))); 1701 break; 1702 default: 1703 ND_PRINT((ndo,", unknown subject")); 1704 break; 1705 } 1706 1707 /*(*/ 1708 ND_PRINT((ndo,")")); 1709 break; 1710 1711 case ICMP6_NI_REPLY: 1712 if (icmp6len > siz) { 1713 ND_PRINT((ndo,"[|icmp6: node information reply]")); 1714 break; 1715 } 1716 1717 needcomma = 0; 1718 1719 ni6 = (struct icmp6_nodeinfo *)dp; 1720 ND_PRINT((ndo," node information reply")); 1721 ND_PRINT((ndo," (")); /*)*/ 1722 switch (ni6->ni_code) { 1723 case ICMP6_NI_SUCCESS: 1724 if (ndo->ndo_vflag) { 1725 ND_PRINT((ndo,"success")); 1726 needcomma++; 1727 } 1728 break; 1729 case ICMP6_NI_REFUSED: 1730 ND_PRINT((ndo,"refused")); 1731 needcomma++; 1732 if (siz != sizeof(*ni6)) 1733 if (ndo->ndo_vflag) 1734 ND_PRINT((ndo,", invalid length")); 1735 break; 1736 case ICMP6_NI_UNKNOWN: 1737 ND_PRINT((ndo,"unknown")); 1738 needcomma++; 1739 if (siz != sizeof(*ni6)) 1740 if (ndo->ndo_vflag) 1741 ND_PRINT((ndo,", invalid length")); 1742 break; 1743 } 1744 1745 if (ni6->ni_code != ICMP6_NI_SUCCESS) { 1746 /*(*/ 1747 ND_PRINT((ndo,")")); 1748 break; 1749 } 1750 1751 switch (EXTRACT_16BITS(&ni6->ni_qtype)) { 1752 case NI_QTYPE_NOOP: 1753 if (needcomma) 1754 ND_PRINT((ndo,", ")); 1755 ND_PRINT((ndo,"noop")); 1756 if (siz != sizeof(*ni6)) 1757 if (ndo->ndo_vflag) 1758 ND_PRINT((ndo,", invalid length")); 1759 break; 1760 case NI_QTYPE_SUPTYPES: 1761 if (needcomma) 1762 ND_PRINT((ndo,", ")); 1763 ND_PRINT((ndo,"supported qtypes")); 1764 i = EXTRACT_16BITS(&ni6->ni_flags); 1765 if (i) 1766 ND_PRINT((ndo," [%s]", (i & 0x01) ? "C" : "")); 1767 break; 1768 case NI_QTYPE_FQDN: 1769 if (needcomma) 1770 ND_PRINT((ndo,", ")); 1771 ND_PRINT((ndo,"DNS name")); 1772 cp = (const u_char *)(ni6 + 1) + 4; 1773 if (cp[0] == ep - cp - 1) { 1774 /* icmp-name-lookup-03, pascal string */ 1775 if (ndo->ndo_vflag) 1776 ND_PRINT((ndo,", 03 draft")); 1777 cp++; 1778 ND_PRINT((ndo,", \"")); 1779 while (cp < ep) { 1780 safeputchar(ndo, *cp); 1781 cp++; 1782 } 1783 ND_PRINT((ndo,"\"")); 1784 } else 1785 dnsname_print(ndo, cp, ep); 1786 if ((EXTRACT_16BITS(&ni6->ni_flags) & 0x01) != 0) 1787 ND_PRINT((ndo," [TTL=%u]", *(uint32_t *)(ni6 + 1))); 1788 break; 1789 case NI_QTYPE_NODEADDR: 1790 if (needcomma) 1791 ND_PRINT((ndo,", ")); 1792 ND_PRINT((ndo,"node addresses")); 1793 i = sizeof(*ni6); 1794 while (i < siz) { 1795 if (i + sizeof(struct in6_addr) + sizeof(int32_t) > siz) 1796 break; 1797 ND_PRINT((ndo," %s", getname6(ndo, bp + i))); 1798 i += sizeof(struct in6_addr); 1799 ND_PRINT((ndo,"(%d)", (int32_t)EXTRACT_32BITS(bp + i))); 1800 i += sizeof(int32_t); 1801 } 1802 i = ni6->ni_flags; 1803 if (!i) 1804 break; 1805 ND_PRINT((ndo," [%s%s%s%s%s%s%s]", 1806 (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "", 1807 (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "", 1808 (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "", 1809 (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "", 1810 (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "", 1811 (i & NI_NODEADDR_FLAG_ALL) ? "A" : "", 1812 (i & NI_NODEADDR_FLAG_TRUNCATE) ? "T" : "")); 1813 break; 1814 default: 1815 if (needcomma) 1816 ND_PRINT((ndo,", ")); 1817 ND_PRINT((ndo,"unknown")); 1818 break; 1819 } 1820 1821 /*(*/ 1822 ND_PRINT((ndo,")")); 1823 break; 1824 } 1825 return; 1826 1827 trunc: 1828 ND_PRINT((ndo, "[|icmp6]")); 1829 } 1830 1831 static void 1832 icmp6_rrenum_print(netdissect_options *ndo, const u_char *bp, const u_char *ep) 1833 { 1834 const struct icmp6_router_renum *rr6; 1835 const char *cp; 1836 struct rr_pco_match *match; 1837 struct rr_pco_use *use; 1838 char hbuf[NI_MAXHOST]; 1839 int n; 1840 1841 if (ep < bp) 1842 return; 1843 rr6 = (struct icmp6_router_renum *)bp; 1844 cp = (const char *)(rr6 + 1); 1845 1846 ND_TCHECK(rr6->rr_reserved); 1847 switch (rr6->rr_code) { 1848 case ICMP6_ROUTER_RENUMBERING_COMMAND: 1849 ND_PRINT((ndo,"router renum: command")); 1850 break; 1851 case ICMP6_ROUTER_RENUMBERING_RESULT: 1852 ND_PRINT((ndo,"router renum: result")); 1853 break; 1854 case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET: 1855 ND_PRINT((ndo,"router renum: sequence number reset")); 1856 break; 1857 default: 1858 ND_PRINT((ndo,"router renum: code-#%d", rr6->rr_code)); 1859 break; 1860 } 1861 1862 ND_PRINT((ndo,", seq=%u", EXTRACT_32BITS(&rr6->rr_seqnum))); 1863 1864 if (ndo->ndo_vflag) { 1865 #define F(x, y) ((rr6->rr_flags) & (x) ? (y) : "") 1866 ND_PRINT((ndo,"[")); /*]*/ 1867 if (rr6->rr_flags) { 1868 ND_PRINT((ndo,"%s%s%s%s%s,", F(ICMP6_RR_FLAGS_TEST, "T"), 1869 F(ICMP6_RR_FLAGS_REQRESULT, "R"), 1870 F(ICMP6_RR_FLAGS_FORCEAPPLY, "A"), 1871 F(ICMP6_RR_FLAGS_SPECSITE, "S"), 1872 F(ICMP6_RR_FLAGS_PREVDONE, "P"))); 1873 } 1874 ND_PRINT((ndo,"seg=%u,", rr6->rr_segnum)); 1875 ND_PRINT((ndo,"maxdelay=%u", EXTRACT_16BITS(&rr6->rr_maxdelay))); 1876 if (rr6->rr_reserved) 1877 ND_PRINT((ndo,"rsvd=0x%x", EXTRACT_32BITS(&rr6->rr_reserved))); 1878 /*[*/ 1879 ND_PRINT((ndo,"]")); 1880 #undef F 1881 } 1882 1883 if (rr6->rr_code == ICMP6_ROUTER_RENUMBERING_COMMAND) { 1884 match = (struct rr_pco_match *)cp; 1885 cp = (const char *)(match + 1); 1886 1887 ND_TCHECK(match->rpm_prefix); 1888 1889 if (ndo->ndo_vflag > 1) 1890 ND_PRINT((ndo,"\n\t")); 1891 else 1892 ND_PRINT((ndo," ")); 1893 ND_PRINT((ndo,"match(")); /*)*/ 1894 switch (match->rpm_code) { 1895 case RPM_PCO_ADD: ND_PRINT((ndo,"add")); break; 1896 case RPM_PCO_CHANGE: ND_PRINT((ndo,"change")); break; 1897 case RPM_PCO_SETGLOBAL: ND_PRINT((ndo,"setglobal")); break; 1898 default: ND_PRINT((ndo,"#%u", match->rpm_code)); break; 1899 } 1900 1901 if (ndo->ndo_vflag) { 1902 ND_PRINT((ndo,",ord=%u", match->rpm_ordinal)); 1903 ND_PRINT((ndo,",min=%u", match->rpm_minlen)); 1904 ND_PRINT((ndo,",max=%u", match->rpm_maxlen)); 1905 } 1906 if (inet_ntop(AF_INET6, &match->rpm_prefix, hbuf, sizeof(hbuf))) 1907 ND_PRINT((ndo,",%s/%u", hbuf, match->rpm_matchlen)); 1908 else 1909 ND_PRINT((ndo,",?/%u", match->rpm_matchlen)); 1910 /*(*/ 1911 ND_PRINT((ndo,")")); 1912 1913 n = match->rpm_len - 3; 1914 if (n % 4) 1915 goto trunc; 1916 n /= 4; 1917 while (n-- > 0) { 1918 use = (struct rr_pco_use *)cp; 1919 cp = (const char *)(use + 1); 1920 1921 ND_TCHECK(use->rpu_prefix); 1922 1923 if (ndo->ndo_vflag > 1) 1924 ND_PRINT((ndo,"\n\t")); 1925 else 1926 ND_PRINT((ndo," ")); 1927 ND_PRINT((ndo,"use(")); /*)*/ 1928 if (use->rpu_flags) { 1929 #define F(x, y) ((use->rpu_flags) & (x) ? (y) : "") 1930 ND_PRINT((ndo,"%s%s,", 1931 F(ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME, "V"), 1932 F(ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME, "P"))); 1933 #undef F 1934 } 1935 if (ndo->ndo_vflag) { 1936 ND_PRINT((ndo,"mask=0x%x,", use->rpu_ramask)); 1937 ND_PRINT((ndo,"raflags=0x%x,", use->rpu_raflags)); 1938 if (~use->rpu_vltime == 0) 1939 ND_PRINT((ndo,"vltime=infty,")); 1940 else 1941 ND_PRINT((ndo,"vltime=%u,", 1942 EXTRACT_32BITS(&use->rpu_vltime))); 1943 if (~use->rpu_pltime == 0) 1944 ND_PRINT((ndo,"pltime=infty,")); 1945 else 1946 ND_PRINT((ndo,"pltime=%u,", 1947 EXTRACT_32BITS(&use->rpu_pltime))); 1948 } 1949 if (inet_ntop(AF_INET6, &use->rpu_prefix, hbuf, 1950 sizeof(hbuf))) 1951 ND_PRINT((ndo,"%s/%u/%u", hbuf, use->rpu_uselen, 1952 use->rpu_keeplen)); 1953 else 1954 ND_PRINT((ndo,"?/%u/%u", use->rpu_uselen, 1955 use->rpu_keeplen)); 1956 /*(*/ 1957 ND_PRINT((ndo,")")); 1958 } 1959 } 1960 1961 return; 1962 1963 trunc: 1964 ND_PRINT((ndo,"[|icmp6]")); 1965 } 1966 1967 #endif /* INET6 */ 1968 1969 /* 1970 * Local Variables: 1971 * c-style: whitesmith 1972 * c-basic-offset: 8 1973 * End: 1974 */ 1975
