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 /* \summary: IPv6 Internet Control Message Protocol (ICMPv6) printer */ 23 24 #ifdef HAVE_CONFIG_H 25 #include "config.h" 26 #endif 27 28 #include <netdissect-stdinc.h> 29 30 #include <stdio.h> 31 #include <string.h> 32 33 #include "netdissect.h" 34 #include "addrtoname.h" 35 #include "addrtostr.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 nd_uint8_t nd_opt_pi_type; 288 nd_uint8_t nd_opt_pi_len; 289 nd_uint8_t nd_opt_pi_prefix_len; 290 nd_uint8_t nd_opt_pi_flags_reserved; 291 nd_uint32_t nd_opt_pi_valid_time; 292 nd_uint32_t nd_opt_pi_preferred_time; 293 nd_uint32_t nd_opt_pi_reserved2; 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(netdissect_options *ndo, const struct ip6_hdr *ip6, 626 const struct icmp6_hdr *icp, u_int len) 627 { 628 return nextproto6_cksum(ndo, ip6, (const uint8_t *)(const void *)icp, len, len, 629 IPPROTO_ICMPV6); 630 } 631 632 static 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 static 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_dio_printopt(netdissect_options *ndo, 655 const struct rpl_dio_genoption *opt, 656 u_int length) 657 { 658 if(length < RPL_DIO_GENOPTION_LEN) return; 659 length -= RPL_DIO_GENOPTION_LEN; 660 661 ND_TCHECK(opt->rpl_dio_len); 662 663 while((opt->rpl_dio_type == RPL_OPT_PAD0 && 664 (const u_char *)opt < ndo->ndo_snapend) || 665 ND_TTEST2(*opt,(opt->rpl_dio_len+2))) { 666 667 unsigned int optlen = opt->rpl_dio_len+2; 668 if(opt->rpl_dio_type == RPL_OPT_PAD0) { 669 optlen = 1; 670 ND_PRINT((ndo, " opt:pad0")); 671 } else { 672 ND_PRINT((ndo, " opt:%s len:%u ", 673 tok2str(rpl_subopt_values, "subopt:%u", opt->rpl_dio_type), 674 optlen)); 675 if(ndo->ndo_vflag > 2) { 676 unsigned int paylen = opt->rpl_dio_len; 677 if(paylen > length) paylen = length; 678 hex_print(ndo, 679 " ", 680 ((const uint8_t *)opt) + RPL_DIO_GENOPTION_LEN, /* content of DIO option */ 681 paylen); 682 } 683 } 684 opt = (const struct rpl_dio_genoption *)(((const char *)opt) + optlen); 685 length -= optlen; 686 } 687 return; 688 trunc: 689 ND_PRINT((ndo," [|truncated]")); 690 return; 691 } 692 693 static void 694 rpl_dio_print(netdissect_options *ndo, 695 const u_char *bp, u_int length) 696 { 697 const struct nd_rpl_dio *dio = (const struct nd_rpl_dio *)bp; 698 const char *dagid_str; 699 700 ND_TCHECK(*dio); 701 dagid_str = ip6addr_string (ndo, dio->rpl_dagid); 702 703 ND_PRINT((ndo, " [dagid:%s,seq:%u,instance:%u,rank:%u,%smop:%s,prf:%u]", 704 dagid_str, 705 dio->rpl_dtsn, 706 dio->rpl_instanceid, 707 EXTRACT_16BITS(&dio->rpl_dagrank), 708 RPL_DIO_GROUNDED(dio->rpl_mopprf) ? "grounded,":"", 709 tok2str(rpl_mop_values, "mop%u", RPL_DIO_MOP(dio->rpl_mopprf)), 710 RPL_DIO_PRF(dio->rpl_mopprf))); 711 712 if(ndo->ndo_vflag > 1) { 713 const struct rpl_dio_genoption *opt = (const struct rpl_dio_genoption *)&dio[1]; 714 rpl_dio_printopt(ndo, opt, length); 715 } 716 return; 717 trunc: 718 ND_PRINT((ndo," [|truncated]")); 719 return; 720 } 721 722 static void 723 rpl_dao_print(netdissect_options *ndo, 724 const u_char *bp, u_int length) 725 { 726 const struct nd_rpl_dao *dao = (const struct nd_rpl_dao *)bp; 727 const char *dagid_str = "<elided>"; 728 729 ND_TCHECK(*dao); 730 if (length < ND_RPL_DAO_MIN_LEN) 731 goto tooshort; 732 733 bp += ND_RPL_DAO_MIN_LEN; 734 length -= ND_RPL_DAO_MIN_LEN; 735 if(RPL_DAO_D(dao->rpl_flags)) { 736 ND_TCHECK2(dao->rpl_dagid, DAGID_LEN); 737 if (length < DAGID_LEN) 738 goto tooshort; 739 dagid_str = ip6addr_string (ndo, dao->rpl_dagid); 740 bp += DAGID_LEN; 741 length -= DAGID_LEN; 742 } 743 744 ND_PRINT((ndo, " [dagid:%s,seq:%u,instance:%u%s%s,%02x]", 745 dagid_str, 746 dao->rpl_daoseq, 747 dao->rpl_instanceid, 748 RPL_DAO_K(dao->rpl_flags) ? ",acK":"", 749 RPL_DAO_D(dao->rpl_flags) ? ",Dagid":"", 750 dao->rpl_flags)); 751 752 if(ndo->ndo_vflag > 1) { 753 const struct rpl_dio_genoption *opt = (const struct rpl_dio_genoption *)bp; 754 rpl_dio_printopt(ndo, opt, length); 755 } 756 return; 757 758 trunc: 759 ND_PRINT((ndo," [|truncated]")); 760 return; 761 762 tooshort: 763 ND_PRINT((ndo," [|length too short]")); 764 return; 765 } 766 767 static void 768 rpl_daoack_print(netdissect_options *ndo, 769 const u_char *bp, u_int length) 770 { 771 const struct nd_rpl_daoack *daoack = (const struct nd_rpl_daoack *)bp; 772 const char *dagid_str = "<elided>"; 773 774 ND_TCHECK2(*daoack, ND_RPL_DAOACK_MIN_LEN); 775 if (length < ND_RPL_DAOACK_MIN_LEN) 776 goto tooshort; 777 778 bp += ND_RPL_DAOACK_MIN_LEN; 779 length -= ND_RPL_DAOACK_MIN_LEN; 780 if(RPL_DAOACK_D(daoack->rpl_flags)) { 781 ND_TCHECK2(daoack->rpl_dagid, DAGID_LEN); 782 if (length < DAGID_LEN) 783 goto tooshort; 784 dagid_str = ip6addr_string (ndo, daoack->rpl_dagid); 785 bp += DAGID_LEN; 786 length -= DAGID_LEN; 787 } 788 789 ND_PRINT((ndo, " [dagid:%s,seq:%u,instance:%u,status:%u]", 790 dagid_str, 791 daoack->rpl_daoseq, 792 daoack->rpl_instanceid, 793 daoack->rpl_status)); 794 795 /* no officially defined options for DAOACK, but print any we find */ 796 if(ndo->ndo_vflag > 1) { 797 const struct rpl_dio_genoption *opt = (const struct rpl_dio_genoption *)bp; 798 rpl_dio_printopt(ndo, opt, length); 799 } 800 return; 801 802 trunc: 803 ND_PRINT((ndo," [|dao-truncated]")); 804 return; 805 806 tooshort: 807 ND_PRINT((ndo," [|dao-length too short]")); 808 return; 809 } 810 811 static void 812 rpl_print(netdissect_options *ndo, 813 const struct icmp6_hdr *hdr, 814 const u_char *bp, u_int length) 815 { 816 int secured = hdr->icmp6_code & 0x80; 817 int basecode= hdr->icmp6_code & 0x7f; 818 819 if(secured) { 820 ND_PRINT((ndo, ", (SEC) [worktodo]")); 821 /* XXX 822 * the next header pointer needs to move forward to 823 * skip the secure part. 824 */ 825 return; 826 } else { 827 ND_PRINT((ndo, ", (CLR)")); 828 } 829 830 switch(basecode) { 831 case ND_RPL_DAG_IS: 832 ND_PRINT((ndo, "DODAG Information Solicitation")); 833 if(ndo->ndo_vflag) { 834 } 835 break; 836 case ND_RPL_DAG_IO: 837 ND_PRINT((ndo, "DODAG Information Object")); 838 if(ndo->ndo_vflag) { 839 rpl_dio_print(ndo, bp, length); 840 } 841 break; 842 case ND_RPL_DAO: 843 ND_PRINT((ndo, "Destination Advertisement Object")); 844 if(ndo->ndo_vflag) { 845 rpl_dao_print(ndo, bp, length); 846 } 847 break; 848 case ND_RPL_DAO_ACK: 849 ND_PRINT((ndo, "Destination Advertisement Object Ack")); 850 if(ndo->ndo_vflag) { 851 rpl_daoack_print(ndo, bp, length); 852 } 853 break; 854 default: 855 ND_PRINT((ndo, "RPL message, unknown code %u",hdr->icmp6_code)); 856 break; 857 } 858 return; 859 860 #if 0 861 trunc: 862 ND_PRINT((ndo," [|truncated]")); 863 return; 864 #endif 865 866 } 867 868 869 void 870 icmp6_print(netdissect_options *ndo, 871 const u_char *bp, u_int length, const u_char *bp2, int fragmented) 872 { 873 const struct icmp6_hdr *dp; 874 const struct ip6_hdr *ip; 875 const struct ip6_hdr *oip; 876 const struct udphdr *ouh; 877 int dport; 878 const u_char *ep; 879 u_int prot; 880 881 dp = (const struct icmp6_hdr *)bp; 882 ip = (const struct ip6_hdr *)bp2; 883 oip = (const struct ip6_hdr *)(dp + 1); 884 /* 'ep' points to the end of available data. */ 885 ep = ndo->ndo_snapend; 886 887 ND_TCHECK(dp->icmp6_cksum); 888 889 if (ndo->ndo_vflag && !fragmented) { 890 uint16_t sum, udp_sum; 891 892 if (ND_TTEST2(bp[0], length)) { 893 udp_sum = EXTRACT_16BITS(&dp->icmp6_cksum); 894 sum = icmp6_cksum(ndo, ip, dp, length); 895 if (sum != 0) 896 ND_PRINT((ndo,"[bad icmp6 cksum 0x%04x -> 0x%04x!] ", 897 udp_sum, 898 in_cksum_shouldbe(udp_sum, sum))); 899 else 900 ND_PRINT((ndo,"[icmp6 sum ok] ")); 901 } 902 } 903 904 ND_PRINT((ndo,"ICMP6, %s", tok2str(icmp6_type_values,"unknown icmp6 type (%u)",dp->icmp6_type))); 905 906 /* display cosmetics: print the packet length for printer that use the vflag now */ 907 if (ndo->ndo_vflag && (dp->icmp6_type == ND_ROUTER_SOLICIT || 908 dp->icmp6_type == ND_ROUTER_ADVERT || 909 dp->icmp6_type == ND_NEIGHBOR_ADVERT || 910 dp->icmp6_type == ND_NEIGHBOR_SOLICIT || 911 dp->icmp6_type == ND_REDIRECT || 912 dp->icmp6_type == ICMP6_HADISCOV_REPLY || 913 dp->icmp6_type == ICMP6_MOBILEPREFIX_ADVERT )) 914 ND_PRINT((ndo,", length %u", length)); 915 916 switch (dp->icmp6_type) { 917 case ICMP6_DST_UNREACH: 918 ND_TCHECK(oip->ip6_dst); 919 ND_PRINT((ndo,", %s", tok2str(icmp6_dst_unreach_code_values,"unknown unreach code (%u)",dp->icmp6_code))); 920 switch (dp->icmp6_code) { 921 922 case ICMP6_DST_UNREACH_NOROUTE: /* fall through */ 923 case ICMP6_DST_UNREACH_ADMIN: 924 case ICMP6_DST_UNREACH_ADDR: 925 ND_PRINT((ndo," %s",ip6addr_string(ndo, &oip->ip6_dst))); 926 break; 927 case ICMP6_DST_UNREACH_BEYONDSCOPE: 928 ND_PRINT((ndo," %s, source address %s", 929 ip6addr_string(ndo, &oip->ip6_dst), 930 ip6addr_string(ndo, &oip->ip6_src))); 931 break; 932 case ICMP6_DST_UNREACH_NOPORT: 933 if ((ouh = get_upperlayer(ndo, (const u_char *)oip, &prot)) 934 == NULL) 935 goto trunc; 936 937 dport = EXTRACT_16BITS(&ouh->uh_dport); 938 switch (prot) { 939 case IPPROTO_TCP: 940 ND_PRINT((ndo,", %s tcp port %s", 941 ip6addr_string(ndo, &oip->ip6_dst), 942 tcpport_string(ndo, dport))); 943 break; 944 case IPPROTO_UDP: 945 ND_PRINT((ndo,", %s udp port %s", 946 ip6addr_string(ndo, &oip->ip6_dst), 947 udpport_string(ndo, dport))); 948 break; 949 default: 950 ND_PRINT((ndo,", %s protocol %d port %d unreachable", 951 ip6addr_string(ndo, &oip->ip6_dst), 952 oip->ip6_nxt, dport)); 953 break; 954 } 955 break; 956 default: 957 if (ndo->ndo_vflag <= 1) { 958 print_unknown_data(ndo, bp,"\n\t",length); 959 return; 960 } 961 break; 962 } 963 break; 964 case ICMP6_PACKET_TOO_BIG: 965 ND_TCHECK(dp->icmp6_mtu); 966 ND_PRINT((ndo,", mtu %u", EXTRACT_32BITS(&dp->icmp6_mtu))); 967 break; 968 case ICMP6_TIME_EXCEEDED: 969 ND_TCHECK(oip->ip6_dst); 970 switch (dp->icmp6_code) { 971 case ICMP6_TIME_EXCEED_TRANSIT: 972 ND_PRINT((ndo," for %s", 973 ip6addr_string(ndo, &oip->ip6_dst))); 974 break; 975 case ICMP6_TIME_EXCEED_REASSEMBLY: 976 ND_PRINT((ndo," (reassembly)")); 977 break; 978 default: 979 ND_PRINT((ndo,", unknown code (%u)", dp->icmp6_code)); 980 break; 981 } 982 break; 983 case ICMP6_PARAM_PROB: 984 ND_TCHECK(oip->ip6_dst); 985 switch (dp->icmp6_code) { 986 case ICMP6_PARAMPROB_HEADER: 987 ND_PRINT((ndo,", erroneous - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr))); 988 break; 989 case ICMP6_PARAMPROB_NEXTHEADER: 990 ND_PRINT((ndo,", next header - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr))); 991 break; 992 case ICMP6_PARAMPROB_OPTION: 993 ND_PRINT((ndo,", option - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr))); 994 break; 995 default: 996 ND_PRINT((ndo,", code-#%d", 997 dp->icmp6_code)); 998 break; 999 } 1000 break; 1001 case ICMP6_ECHO_REQUEST: 1002 case ICMP6_ECHO_REPLY: 1003 ND_TCHECK(dp->icmp6_seq); 1004 ND_PRINT((ndo,", seq %u", EXTRACT_16BITS(&dp->icmp6_seq))); 1005 break; 1006 case ICMP6_MEMBERSHIP_QUERY: 1007 if (length == MLD_MINLEN) { 1008 mld6_print(ndo, (const u_char *)dp); 1009 } else if (length >= MLDV2_MINLEN) { 1010 ND_PRINT((ndo," v2")); 1011 mldv2_query_print(ndo, (const u_char *)dp, length); 1012 } else { 1013 ND_PRINT((ndo," unknown-version (len %u) ", length)); 1014 } 1015 break; 1016 case ICMP6_MEMBERSHIP_REPORT: 1017 mld6_print(ndo, (const u_char *)dp); 1018 break; 1019 case ICMP6_MEMBERSHIP_REDUCTION: 1020 mld6_print(ndo, (const u_char *)dp); 1021 break; 1022 case ND_ROUTER_SOLICIT: 1023 #define RTSOLLEN 8 1024 if (ndo->ndo_vflag) { 1025 icmp6_opt_print(ndo, (const u_char *)dp + RTSOLLEN, 1026 length - RTSOLLEN); 1027 } 1028 break; 1029 case ND_ROUTER_ADVERT: 1030 #define RTADVLEN 16 1031 if (ndo->ndo_vflag) { 1032 const struct nd_router_advert *p; 1033 1034 p = (const struct nd_router_advert *)dp; 1035 ND_TCHECK(p->nd_ra_retransmit); 1036 ND_PRINT((ndo,"\n\thop limit %u, Flags [%s]" \ 1037 ", pref %s, router lifetime %us, reachable time %us, retrans time %us", 1038 (u_int)p->nd_ra_curhoplimit, 1039 bittok2str(icmp6_opt_ra_flag_values,"none",(p->nd_ra_flags_reserved)), 1040 get_rtpref(p->nd_ra_flags_reserved), 1041 EXTRACT_16BITS(&p->nd_ra_router_lifetime), 1042 EXTRACT_32BITS(&p->nd_ra_reachable), 1043 EXTRACT_32BITS(&p->nd_ra_retransmit))); 1044 1045 icmp6_opt_print(ndo, (const u_char *)dp + RTADVLEN, 1046 length - RTADVLEN); 1047 } 1048 break; 1049 case ND_NEIGHBOR_SOLICIT: 1050 { 1051 const struct nd_neighbor_solicit *p; 1052 p = (const struct nd_neighbor_solicit *)dp; 1053 ND_TCHECK(p->nd_ns_target); 1054 ND_PRINT((ndo,", who has %s", ip6addr_string(ndo, &p->nd_ns_target))); 1055 if (ndo->ndo_vflag) { 1056 #define NDSOLLEN 24 1057 icmp6_opt_print(ndo, (const u_char *)dp + NDSOLLEN, 1058 length - NDSOLLEN); 1059 } 1060 } 1061 break; 1062 case ND_NEIGHBOR_ADVERT: 1063 { 1064 const struct nd_neighbor_advert *p; 1065 1066 p = (const struct nd_neighbor_advert *)dp; 1067 ND_TCHECK(p->nd_na_target); 1068 ND_PRINT((ndo,", tgt is %s", 1069 ip6addr_string(ndo, &p->nd_na_target))); 1070 if (ndo->ndo_vflag) { 1071 ND_PRINT((ndo,", Flags [%s]", 1072 bittok2str(icmp6_nd_na_flag_values, 1073 "none", 1074 EXTRACT_32BITS(&p->nd_na_flags_reserved)))); 1075 #define NDADVLEN 24 1076 icmp6_opt_print(ndo, (const u_char *)dp + NDADVLEN, 1077 length - NDADVLEN); 1078 #undef NDADVLEN 1079 } 1080 } 1081 break; 1082 case ND_REDIRECT: 1083 #define RDR(i) ((const struct nd_redirect *)(i)) 1084 ND_TCHECK(RDR(dp)->nd_rd_dst); 1085 ND_PRINT((ndo,", %s", ip6addr_string(ndo, &RDR(dp)->nd_rd_dst))); 1086 ND_TCHECK(RDR(dp)->nd_rd_target); 1087 ND_PRINT((ndo," to %s", 1088 ip6addr_string(ndo, &RDR(dp)->nd_rd_target))); 1089 #define REDIRECTLEN 40 1090 if (ndo->ndo_vflag) { 1091 icmp6_opt_print(ndo, (const u_char *)dp + REDIRECTLEN, 1092 length - REDIRECTLEN); 1093 } 1094 break; 1095 #undef REDIRECTLEN 1096 #undef RDR 1097 case ICMP6_ROUTER_RENUMBERING: 1098 icmp6_rrenum_print(ndo, bp, ep); 1099 break; 1100 case ICMP6_NI_QUERY: 1101 case ICMP6_NI_REPLY: 1102 icmp6_nodeinfo_print(ndo, length, bp, ep); 1103 break; 1104 case IND_SOLICIT: 1105 case IND_ADVERT: 1106 break; 1107 case ICMP6_V2_MEMBERSHIP_REPORT: 1108 mldv2_report_print(ndo, (const u_char *) dp, length); 1109 break; 1110 case ICMP6_MOBILEPREFIX_SOLICIT: /* fall through */ 1111 case ICMP6_HADISCOV_REQUEST: 1112 ND_TCHECK(dp->icmp6_data16[0]); 1113 ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0]))); 1114 break; 1115 case ICMP6_HADISCOV_REPLY: 1116 if (ndo->ndo_vflag) { 1117 const struct in6_addr *in6; 1118 const u_char *cp; 1119 1120 ND_TCHECK(dp->icmp6_data16[0]); 1121 ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0]))); 1122 cp = (const u_char *)dp + length; 1123 in6 = (const struct in6_addr *)(dp + 1); 1124 for (; (const u_char *)in6 < cp; in6++) { 1125 ND_TCHECK(*in6); 1126 ND_PRINT((ndo,", %s", ip6addr_string(ndo, in6))); 1127 } 1128 } 1129 break; 1130 case ICMP6_MOBILEPREFIX_ADVERT: 1131 if (ndo->ndo_vflag) { 1132 ND_TCHECK(dp->icmp6_data16[0]); 1133 ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0]))); 1134 if (dp->icmp6_data16[1] & 0xc0) 1135 ND_PRINT((ndo," ")); 1136 if (dp->icmp6_data16[1] & 0x80) 1137 ND_PRINT((ndo,"M")); 1138 if (dp->icmp6_data16[1] & 0x40) 1139 ND_PRINT((ndo,"O")); 1140 #define MPADVLEN 8 1141 icmp6_opt_print(ndo, (const u_char *)dp + MPADVLEN, 1142 length - MPADVLEN); 1143 } 1144 break; 1145 case ND_RPL_MESSAGE: 1146 /* plus 4, because struct icmp6_hdr contains 4 bytes of icmp payload */ 1147 rpl_print(ndo, dp, &dp->icmp6_data8[0], length-sizeof(struct icmp6_hdr)+4); 1148 break; 1149 default: 1150 ND_PRINT((ndo,", length %u", length)); 1151 if (ndo->ndo_vflag <= 1) 1152 print_unknown_data(ndo, bp,"\n\t", length); 1153 return; 1154 } 1155 if (!ndo->ndo_vflag) 1156 ND_PRINT((ndo,", length %u", length)); 1157 return; 1158 trunc: 1159 ND_PRINT((ndo, "[|icmp6]")); 1160 } 1161 1162 static const struct udphdr * 1163 get_upperlayer(netdissect_options *ndo, const u_char *bp, u_int *prot) 1164 { 1165 const u_char *ep; 1166 const struct ip6_hdr *ip6 = (const struct ip6_hdr *)bp; 1167 const struct udphdr *uh; 1168 const struct ip6_hbh *hbh; 1169 const struct ip6_frag *fragh; 1170 const struct ah *ah; 1171 u_int nh; 1172 int hlen; 1173 1174 /* 'ep' points to the end of available data. */ 1175 ep = ndo->ndo_snapend; 1176 1177 if (!ND_TTEST(ip6->ip6_nxt)) 1178 return NULL; 1179 1180 nh = ip6->ip6_nxt; 1181 hlen = sizeof(struct ip6_hdr); 1182 1183 while (bp < ep) { 1184 bp += hlen; 1185 1186 switch(nh) { 1187 case IPPROTO_UDP: 1188 case IPPROTO_TCP: 1189 uh = (const struct udphdr *)bp; 1190 if (ND_TTEST(uh->uh_dport)) { 1191 *prot = nh; 1192 return(uh); 1193 } 1194 else 1195 return(NULL); 1196 /* NOTREACHED */ 1197 1198 case IPPROTO_HOPOPTS: 1199 case IPPROTO_DSTOPTS: 1200 case IPPROTO_ROUTING: 1201 hbh = (const struct ip6_hbh *)bp; 1202 if (!ND_TTEST(hbh->ip6h_len)) 1203 return(NULL); 1204 nh = hbh->ip6h_nxt; 1205 hlen = (hbh->ip6h_len + 1) << 3; 1206 break; 1207 1208 case IPPROTO_FRAGMENT: /* this should be odd, but try anyway */ 1209 fragh = (const struct ip6_frag *)bp; 1210 if (!ND_TTEST(fragh->ip6f_offlg)) 1211 return(NULL); 1212 /* fragments with non-zero offset are meaningless */ 1213 if ((EXTRACT_16BITS(&fragh->ip6f_offlg) & IP6F_OFF_MASK) != 0) 1214 return(NULL); 1215 nh = fragh->ip6f_nxt; 1216 hlen = sizeof(struct ip6_frag); 1217 break; 1218 1219 case IPPROTO_AH: 1220 ah = (const struct ah *)bp; 1221 if (!ND_TTEST(ah->ah_len)) 1222 return(NULL); 1223 nh = ah->ah_nxt; 1224 hlen = (ah->ah_len + 2) << 2; 1225 break; 1226 1227 default: /* unknown or undecodable header */ 1228 *prot = nh; /* meaningless, but set here anyway */ 1229 return(NULL); 1230 } 1231 } 1232 1233 return(NULL); /* should be notreached, though */ 1234 } 1235 1236 static void 1237 icmp6_opt_print(netdissect_options *ndo, const u_char *bp, int resid) 1238 { 1239 const struct nd_opt_hdr *op; 1240 const struct nd_opt_prefix_info *opp; 1241 const struct nd_opt_mtu *opm; 1242 const struct nd_opt_rdnss *oprd; 1243 const struct nd_opt_dnssl *opds; 1244 const struct nd_opt_advinterval *opa; 1245 const struct nd_opt_homeagent_info *oph; 1246 const struct nd_opt_route_info *opri; 1247 const u_char *cp, *ep, *domp; 1248 struct in6_addr in6; 1249 const struct in6_addr *in6p; 1250 size_t l; 1251 u_int i; 1252 1253 #define ECHECK(var) if ((const u_char *)&(var) > ep - sizeof(var)) return 1254 1255 cp = bp; 1256 /* 'ep' points to the end of available data. */ 1257 ep = ndo->ndo_snapend; 1258 1259 while (cp < ep) { 1260 op = (const struct nd_opt_hdr *)cp; 1261 1262 ECHECK(op->nd_opt_len); 1263 if (resid <= 0) 1264 return; 1265 if (op->nd_opt_len == 0) 1266 goto trunc; 1267 if (cp + (op->nd_opt_len << 3) > ep) 1268 goto trunc; 1269 1270 ND_PRINT((ndo,"\n\t %s option (%u), length %u (%u): ", 1271 tok2str(icmp6_opt_values, "unknown", op->nd_opt_type), 1272 op->nd_opt_type, 1273 op->nd_opt_len << 3, 1274 op->nd_opt_len)); 1275 1276 switch (op->nd_opt_type) { 1277 case ND_OPT_SOURCE_LINKADDR: 1278 l = (op->nd_opt_len << 3) - 2; 1279 print_lladdr(ndo, cp + 2, l); 1280 break; 1281 case ND_OPT_TARGET_LINKADDR: 1282 l = (op->nd_opt_len << 3) - 2; 1283 print_lladdr(ndo, cp + 2, l); 1284 break; 1285 case ND_OPT_PREFIX_INFORMATION: 1286 opp = (const struct nd_opt_prefix_info *)op; 1287 ND_TCHECK(opp->nd_opt_pi_prefix); 1288 ND_PRINT((ndo,"%s/%u%s, Flags [%s], valid time %s", 1289 ip6addr_string(ndo, &opp->nd_opt_pi_prefix), 1290 opp->nd_opt_pi_prefix_len, 1291 (op->nd_opt_len != 4) ? "badlen" : "", 1292 bittok2str(icmp6_opt_pi_flag_values, "none", opp->nd_opt_pi_flags_reserved), 1293 get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_valid_time)))); 1294 ND_PRINT((ndo,", pref. time %s", get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_preferred_time)))); 1295 break; 1296 case ND_OPT_REDIRECTED_HEADER: 1297 print_unknown_data(ndo, bp,"\n\t ",op->nd_opt_len<<3); 1298 /* xxx */ 1299 break; 1300 case ND_OPT_MTU: 1301 opm = (const struct nd_opt_mtu *)op; 1302 ND_TCHECK(opm->nd_opt_mtu_mtu); 1303 ND_PRINT((ndo," %u%s", 1304 EXTRACT_32BITS(&opm->nd_opt_mtu_mtu), 1305 (op->nd_opt_len != 1) ? "bad option length" : "" )); 1306 break; 1307 case ND_OPT_RDNSS: 1308 oprd = (const struct nd_opt_rdnss *)op; 1309 l = (op->nd_opt_len - 1) / 2; 1310 ND_PRINT((ndo," lifetime %us,", 1311 EXTRACT_32BITS(&oprd->nd_opt_rdnss_lifetime))); 1312 for (i = 0; i < l; i++) { 1313 ND_TCHECK(oprd->nd_opt_rdnss_addr[i]); 1314 ND_PRINT((ndo," addr: %s", 1315 ip6addr_string(ndo, &oprd->nd_opt_rdnss_addr[i]))); 1316 } 1317 break; 1318 case ND_OPT_DNSSL: 1319 opds = (const struct nd_opt_dnssl *)op; 1320 ND_PRINT((ndo," lifetime %us, domain(s):", 1321 EXTRACT_32BITS(&opds->nd_opt_dnssl_lifetime))); 1322 domp = cp + 8; /* domain names, variable-sized, RFC1035-encoded */ 1323 while (domp < cp + (op->nd_opt_len << 3) && *domp != '\0') 1324 { 1325 ND_PRINT((ndo, " ")); 1326 if ((domp = ns_nprint (ndo, domp, bp)) == NULL) 1327 goto trunc; 1328 } 1329 break; 1330 case ND_OPT_ADVINTERVAL: 1331 opa = (const struct nd_opt_advinterval *)op; 1332 ND_TCHECK(opa->nd_opt_adv_interval); 1333 ND_PRINT((ndo," %ums", EXTRACT_32BITS(&opa->nd_opt_adv_interval))); 1334 break; 1335 case ND_OPT_HOMEAGENT_INFO: 1336 oph = (const struct nd_opt_homeagent_info *)op; 1337 ND_TCHECK(oph->nd_opt_hai_lifetime); 1338 ND_PRINT((ndo," preference %u, lifetime %u", 1339 EXTRACT_16BITS(&oph->nd_opt_hai_preference), 1340 EXTRACT_16BITS(&oph->nd_opt_hai_lifetime))); 1341 break; 1342 case ND_OPT_ROUTE_INFO: 1343 opri = (const struct nd_opt_route_info *)op; 1344 ND_TCHECK(opri->nd_opt_rti_lifetime); 1345 memset(&in6, 0, sizeof(in6)); 1346 in6p = (const struct in6_addr *)(opri + 1); 1347 switch (op->nd_opt_len) { 1348 case 1: 1349 break; 1350 case 2: 1351 ND_TCHECK2(*in6p, 8); 1352 memcpy(&in6, opri + 1, 8); 1353 break; 1354 case 3: 1355 ND_TCHECK(*in6p); 1356 memcpy(&in6, opri + 1, sizeof(in6)); 1357 break; 1358 default: 1359 goto trunc; 1360 } 1361 ND_PRINT((ndo," %s/%u", ip6addr_string(ndo, &in6), 1362 opri->nd_opt_rti_prefixlen)); 1363 ND_PRINT((ndo,", pref=%s", get_rtpref(opri->nd_opt_rti_flags))); 1364 ND_PRINT((ndo,", lifetime=%s", 1365 get_lifetime(EXTRACT_32BITS(&opri->nd_opt_rti_lifetime)))); 1366 break; 1367 default: 1368 if (ndo->ndo_vflag <= 1) { 1369 print_unknown_data(ndo,cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */ 1370 return; 1371 } 1372 break; 1373 } 1374 /* do we want to see an additional hexdump ? */ 1375 if (ndo->ndo_vflag> 1) 1376 print_unknown_data(ndo, cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */ 1377 1378 cp += op->nd_opt_len << 3; 1379 resid -= op->nd_opt_len << 3; 1380 } 1381 return; 1382 1383 trunc: 1384 ND_PRINT((ndo, "[ndp opt]")); 1385 return; 1386 #undef ECHECK 1387 } 1388 1389 static void 1390 mld6_print(netdissect_options *ndo, const u_char *bp) 1391 { 1392 const struct mld6_hdr *mp = (const struct mld6_hdr *)bp; 1393 const u_char *ep; 1394 1395 /* 'ep' points to the end of available data. */ 1396 ep = ndo->ndo_snapend; 1397 1398 if ((const u_char *)mp + sizeof(*mp) > ep) 1399 return; 1400 1401 ND_PRINT((ndo,"max resp delay: %d ", EXTRACT_16BITS(&mp->mld6_maxdelay))); 1402 ND_PRINT((ndo,"addr: %s", ip6addr_string(ndo, &mp->mld6_addr))); 1403 } 1404 1405 static void 1406 mldv2_report_print(netdissect_options *ndo, const u_char *bp, u_int len) 1407 { 1408 const struct icmp6_hdr *icp = (const struct icmp6_hdr *) bp; 1409 u_int group, nsrcs, ngroups; 1410 u_int i, j; 1411 1412 /* Minimum len is 8 */ 1413 if (len < 8) { 1414 ND_PRINT((ndo," [invalid len %d]", len)); 1415 return; 1416 } 1417 1418 ND_TCHECK(icp->icmp6_data16[1]); 1419 ngroups = EXTRACT_16BITS(&icp->icmp6_data16[1]); 1420 ND_PRINT((ndo,", %d group record(s)", ngroups)); 1421 if (ndo->ndo_vflag > 0) { 1422 /* Print the group records */ 1423 group = 8; 1424 for (i = 0; i < ngroups; i++) { 1425 /* type(1) + auxlen(1) + numsrc(2) + grp(16) */ 1426 if (len < group + 20) { 1427 ND_PRINT((ndo," [invalid number of groups]")); 1428 return; 1429 } 1430 ND_TCHECK2(bp[group + 4], sizeof(struct in6_addr)); 1431 ND_PRINT((ndo," [gaddr %s", ip6addr_string(ndo, &bp[group + 4]))); 1432 ND_PRINT((ndo," %s", tok2str(mldv2report2str, " [v2-report-#%d]", 1433 bp[group]))); 1434 nsrcs = (bp[group + 2] << 8) + bp[group + 3]; 1435 /* Check the number of sources and print them */ 1436 if (len < group + 20 + (nsrcs * sizeof(struct in6_addr))) { 1437 ND_PRINT((ndo," [invalid number of sources %d]", nsrcs)); 1438 return; 1439 } 1440 if (ndo->ndo_vflag == 1) 1441 ND_PRINT((ndo,", %d source(s)", nsrcs)); 1442 else { 1443 /* Print the sources */ 1444 ND_PRINT((ndo," {")); 1445 for (j = 0; j < nsrcs; j++) { 1446 ND_TCHECK2(bp[group + 20 + j * sizeof(struct in6_addr)], 1447 sizeof(struct in6_addr)); 1448 ND_PRINT((ndo," %s", ip6addr_string(ndo, &bp[group + 20 + j * sizeof(struct in6_addr)]))); 1449 } 1450 ND_PRINT((ndo," }")); 1451 } 1452 /* Next group record */ 1453 group += 20 + nsrcs * sizeof(struct in6_addr); 1454 ND_PRINT((ndo,"]")); 1455 } 1456 } 1457 return; 1458 trunc: 1459 ND_PRINT((ndo,"[|icmp6]")); 1460 return; 1461 } 1462 1463 static void 1464 mldv2_query_print(netdissect_options *ndo, const u_char *bp, u_int len) 1465 { 1466 const struct icmp6_hdr *icp = (const struct icmp6_hdr *) bp; 1467 u_int mrc; 1468 int mrt, qqi; 1469 u_int nsrcs; 1470 register u_int i; 1471 1472 /* Minimum len is 28 */ 1473 if (len < 28) { 1474 ND_PRINT((ndo," [invalid len %d]", len)); 1475 return; 1476 } 1477 ND_TCHECK(icp->icmp6_data16[0]); 1478 mrc = EXTRACT_16BITS(&icp->icmp6_data16[0]); 1479 if (mrc < 32768) { 1480 mrt = mrc; 1481 } else { 1482 mrt = ((mrc & 0x0fff) | 0x1000) << (((mrc & 0x7000) >> 12) + 3); 1483 } 1484 if (ndo->ndo_vflag) { 1485 ND_PRINT((ndo," [max resp delay=%d]", mrt)); 1486 } 1487 ND_TCHECK2(bp[8], sizeof(struct in6_addr)); 1488 ND_PRINT((ndo," [gaddr %s", ip6addr_string(ndo, &bp[8]))); 1489 1490 if (ndo->ndo_vflag) { 1491 ND_TCHECK(bp[25]); 1492 if (bp[24] & 0x08) { 1493 ND_PRINT((ndo," sflag")); 1494 } 1495 if (bp[24] & 0x07) { 1496 ND_PRINT((ndo," robustness=%d", bp[24] & 0x07)); 1497 } 1498 if (bp[25] < 128) { 1499 qqi = bp[25]; 1500 } else { 1501 qqi = ((bp[25] & 0x0f) | 0x10) << (((bp[25] & 0x70) >> 4) + 3); 1502 } 1503 ND_PRINT((ndo," qqi=%d", qqi)); 1504 } 1505 1506 ND_TCHECK2(bp[26], 2); 1507 nsrcs = EXTRACT_16BITS(&bp[26]); 1508 if (nsrcs > 0) { 1509 if (len < 28 + nsrcs * sizeof(struct in6_addr)) 1510 ND_PRINT((ndo," [invalid number of sources]")); 1511 else if (ndo->ndo_vflag > 1) { 1512 ND_PRINT((ndo," {")); 1513 for (i = 0; i < nsrcs; i++) { 1514 ND_TCHECK2(bp[28 + i * sizeof(struct in6_addr)], 1515 sizeof(struct in6_addr)); 1516 ND_PRINT((ndo," %s", ip6addr_string(ndo, &bp[28 + i * sizeof(struct in6_addr)]))); 1517 } 1518 ND_PRINT((ndo," }")); 1519 } else 1520 ND_PRINT((ndo,", %d source(s)", nsrcs)); 1521 } 1522 ND_PRINT((ndo,"]")); 1523 return; 1524 trunc: 1525 ND_PRINT((ndo,"[|icmp6]")); 1526 return; 1527 } 1528 1529 static void 1530 dnsname_print(netdissect_options *ndo, const u_char *cp, const u_char *ep) 1531 { 1532 int i; 1533 1534 /* DNS name decoding - no decompression */ 1535 ND_PRINT((ndo,", \"")); 1536 while (cp < ep) { 1537 i = *cp++; 1538 if (i) { 1539 if (i > ep - cp) { 1540 ND_PRINT((ndo,"???")); 1541 break; 1542 } 1543 while (i-- && cp < ep) { 1544 safeputchar(ndo, *cp); 1545 cp++; 1546 } 1547 if (cp + 1 < ep && *cp) 1548 ND_PRINT((ndo,".")); 1549 } else { 1550 if (cp == ep) { 1551 /* FQDN */ 1552 ND_PRINT((ndo,".")); 1553 } else if (cp + 1 == ep && *cp == '\0') { 1554 /* truncated */ 1555 } else { 1556 /* invalid */ 1557 ND_PRINT((ndo,"???")); 1558 } 1559 break; 1560 } 1561 } 1562 ND_PRINT((ndo,"\"")); 1563 } 1564 1565 static void 1566 icmp6_nodeinfo_print(netdissect_options *ndo, u_int icmp6len, const u_char *bp, const u_char *ep) 1567 { 1568 const struct icmp6_nodeinfo *ni6; 1569 const struct icmp6_hdr *dp; 1570 const u_char *cp; 1571 size_t siz, i; 1572 int needcomma; 1573 1574 if (ep < bp) 1575 return; 1576 dp = (const struct icmp6_hdr *)bp; 1577 ni6 = (const struct icmp6_nodeinfo *)bp; 1578 siz = ep - bp; 1579 1580 switch (ni6->ni_type) { 1581 case ICMP6_NI_QUERY: 1582 if (siz == sizeof(*dp) + 4) { 1583 /* KAME who-are-you */ 1584 ND_PRINT((ndo," who-are-you request")); 1585 break; 1586 } 1587 ND_PRINT((ndo," node information query")); 1588 1589 ND_TCHECK2(*dp, sizeof(*ni6)); 1590 ni6 = (const struct icmp6_nodeinfo *)dp; 1591 ND_PRINT((ndo," (")); /*)*/ 1592 switch (EXTRACT_16BITS(&ni6->ni_qtype)) { 1593 case NI_QTYPE_NOOP: 1594 ND_PRINT((ndo,"noop")); 1595 break; 1596 case NI_QTYPE_SUPTYPES: 1597 ND_PRINT((ndo,"supported qtypes")); 1598 i = EXTRACT_16BITS(&ni6->ni_flags); 1599 if (i) 1600 ND_PRINT((ndo," [%s]", (i & 0x01) ? "C" : "")); 1601 break; 1602 case NI_QTYPE_FQDN: 1603 ND_PRINT((ndo,"DNS name")); 1604 break; 1605 case NI_QTYPE_NODEADDR: 1606 ND_PRINT((ndo,"node addresses")); 1607 i = ni6->ni_flags; 1608 if (!i) 1609 break; 1610 /* NI_NODEADDR_FLAG_TRUNCATE undefined for query */ 1611 ND_PRINT((ndo," [%s%s%s%s%s%s]", 1612 (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "", 1613 (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "", 1614 (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "", 1615 (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "", 1616 (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "", 1617 (i & NI_NODEADDR_FLAG_ALL) ? "A" : "")); 1618 break; 1619 default: 1620 ND_PRINT((ndo,"unknown")); 1621 break; 1622 } 1623 1624 if (ni6->ni_qtype == NI_QTYPE_NOOP || 1625 ni6->ni_qtype == NI_QTYPE_SUPTYPES) { 1626 if (siz != sizeof(*ni6)) 1627 if (ndo->ndo_vflag) 1628 ND_PRINT((ndo,", invalid len")); 1629 /*(*/ 1630 ND_PRINT((ndo,")")); 1631 break; 1632 } 1633 1634 1635 /* XXX backward compat, icmp-name-lookup-03 */ 1636 if (siz == sizeof(*ni6)) { 1637 ND_PRINT((ndo,", 03 draft")); 1638 /*(*/ 1639 ND_PRINT((ndo,")")); 1640 break; 1641 } 1642 1643 switch (ni6->ni_code) { 1644 case ICMP6_NI_SUBJ_IPV6: 1645 if (!ND_TTEST2(*dp, 1646 sizeof(*ni6) + sizeof(struct in6_addr))) 1647 break; 1648 if (siz != sizeof(*ni6) + sizeof(struct in6_addr)) { 1649 if (ndo->ndo_vflag) 1650 ND_PRINT((ndo,", invalid subject len")); 1651 break; 1652 } 1653 ND_PRINT((ndo,", subject=%s", 1654 ip6addr_string(ndo, ni6 + 1))); 1655 break; 1656 case ICMP6_NI_SUBJ_FQDN: 1657 ND_PRINT((ndo,", subject=DNS name")); 1658 cp = (const u_char *)(ni6 + 1); 1659 if (cp[0] == ep - cp - 1) { 1660 /* icmp-name-lookup-03, pascal string */ 1661 if (ndo->ndo_vflag) 1662 ND_PRINT((ndo,", 03 draft")); 1663 cp++; 1664 ND_PRINT((ndo,", \"")); 1665 while (cp < ep) { 1666 safeputchar(ndo, *cp); 1667 cp++; 1668 } 1669 ND_PRINT((ndo,"\"")); 1670 } else 1671 dnsname_print(ndo, cp, ep); 1672 break; 1673 case ICMP6_NI_SUBJ_IPV4: 1674 if (!ND_TTEST2(*dp, sizeof(*ni6) + sizeof(struct in_addr))) 1675 break; 1676 if (siz != sizeof(*ni6) + sizeof(struct in_addr)) { 1677 if (ndo->ndo_vflag) 1678 ND_PRINT((ndo,", invalid subject len")); 1679 break; 1680 } 1681 ND_PRINT((ndo,", subject=%s", 1682 ipaddr_string(ndo, ni6 + 1))); 1683 break; 1684 default: 1685 ND_PRINT((ndo,", unknown subject")); 1686 break; 1687 } 1688 1689 /*(*/ 1690 ND_PRINT((ndo,")")); 1691 break; 1692 1693 case ICMP6_NI_REPLY: 1694 if (icmp6len > siz) { 1695 ND_PRINT((ndo,"[|icmp6: node information reply]")); 1696 break; 1697 } 1698 1699 needcomma = 0; 1700 1701 ni6 = (const struct icmp6_nodeinfo *)dp; 1702 ND_PRINT((ndo," node information reply")); 1703 ND_PRINT((ndo," (")); /*)*/ 1704 switch (ni6->ni_code) { 1705 case ICMP6_NI_SUCCESS: 1706 if (ndo->ndo_vflag) { 1707 ND_PRINT((ndo,"success")); 1708 needcomma++; 1709 } 1710 break; 1711 case ICMP6_NI_REFUSED: 1712 ND_PRINT((ndo,"refused")); 1713 needcomma++; 1714 if (siz != sizeof(*ni6)) 1715 if (ndo->ndo_vflag) 1716 ND_PRINT((ndo,", invalid length")); 1717 break; 1718 case ICMP6_NI_UNKNOWN: 1719 ND_PRINT((ndo,"unknown")); 1720 needcomma++; 1721 if (siz != sizeof(*ni6)) 1722 if (ndo->ndo_vflag) 1723 ND_PRINT((ndo,", invalid length")); 1724 break; 1725 } 1726 1727 if (ni6->ni_code != ICMP6_NI_SUCCESS) { 1728 /*(*/ 1729 ND_PRINT((ndo,")")); 1730 break; 1731 } 1732 1733 switch (EXTRACT_16BITS(&ni6->ni_qtype)) { 1734 case NI_QTYPE_NOOP: 1735 if (needcomma) 1736 ND_PRINT((ndo,", ")); 1737 ND_PRINT((ndo,"noop")); 1738 if (siz != sizeof(*ni6)) 1739 if (ndo->ndo_vflag) 1740 ND_PRINT((ndo,", invalid length")); 1741 break; 1742 case NI_QTYPE_SUPTYPES: 1743 if (needcomma) 1744 ND_PRINT((ndo,", ")); 1745 ND_PRINT((ndo,"supported qtypes")); 1746 i = EXTRACT_16BITS(&ni6->ni_flags); 1747 if (i) 1748 ND_PRINT((ndo," [%s]", (i & 0x01) ? "C" : "")); 1749 break; 1750 case NI_QTYPE_FQDN: 1751 if (needcomma) 1752 ND_PRINT((ndo,", ")); 1753 ND_PRINT((ndo,"DNS name")); 1754 cp = (const u_char *)(ni6 + 1) + 4; 1755 if (cp[0] == ep - cp - 1) { 1756 /* icmp-name-lookup-03, pascal string */ 1757 if (ndo->ndo_vflag) 1758 ND_PRINT((ndo,", 03 draft")); 1759 cp++; 1760 ND_PRINT((ndo,", \"")); 1761 while (cp < ep) { 1762 safeputchar(ndo, *cp); 1763 cp++; 1764 } 1765 ND_PRINT((ndo,"\"")); 1766 } else 1767 dnsname_print(ndo, cp, ep); 1768 if ((EXTRACT_16BITS(&ni6->ni_flags) & 0x01) != 0) 1769 ND_PRINT((ndo," [TTL=%u]", EXTRACT_32BITS(ni6 + 1))); 1770 break; 1771 case NI_QTYPE_NODEADDR: 1772 if (needcomma) 1773 ND_PRINT((ndo,", ")); 1774 ND_PRINT((ndo,"node addresses")); 1775 i = sizeof(*ni6); 1776 while (i < siz) { 1777 if (i + sizeof(struct in6_addr) + sizeof(int32_t) > siz) 1778 break; 1779 ND_PRINT((ndo," %s", ip6addr_string(ndo, bp + i))); 1780 i += sizeof(struct in6_addr); 1781 ND_PRINT((ndo,"(%d)", (int32_t)EXTRACT_32BITS(bp + i))); 1782 i += sizeof(int32_t); 1783 } 1784 i = ni6->ni_flags; 1785 if (!i) 1786 break; 1787 ND_PRINT((ndo," [%s%s%s%s%s%s%s]", 1788 (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "", 1789 (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "", 1790 (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "", 1791 (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "", 1792 (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "", 1793 (i & NI_NODEADDR_FLAG_ALL) ? "A" : "", 1794 (i & NI_NODEADDR_FLAG_TRUNCATE) ? "T" : "")); 1795 break; 1796 default: 1797 if (needcomma) 1798 ND_PRINT((ndo,", ")); 1799 ND_PRINT((ndo,"unknown")); 1800 break; 1801 } 1802 1803 /*(*/ 1804 ND_PRINT((ndo,")")); 1805 break; 1806 } 1807 return; 1808 1809 trunc: 1810 ND_PRINT((ndo, "[|icmp6]")); 1811 } 1812 1813 static void 1814 icmp6_rrenum_print(netdissect_options *ndo, const u_char *bp, const u_char *ep) 1815 { 1816 const struct icmp6_router_renum *rr6; 1817 const char *cp; 1818 const struct rr_pco_match *match; 1819 const struct rr_pco_use *use; 1820 char hbuf[NI_MAXHOST]; 1821 int n; 1822 1823 if (ep < bp) 1824 return; 1825 rr6 = (const struct icmp6_router_renum *)bp; 1826 cp = (const char *)(rr6 + 1); 1827 1828 ND_TCHECK(rr6->rr_reserved); 1829 switch (rr6->rr_code) { 1830 case ICMP6_ROUTER_RENUMBERING_COMMAND: 1831 ND_PRINT((ndo,"router renum: command")); 1832 break; 1833 case ICMP6_ROUTER_RENUMBERING_RESULT: 1834 ND_PRINT((ndo,"router renum: result")); 1835 break; 1836 case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET: 1837 ND_PRINT((ndo,"router renum: sequence number reset")); 1838 break; 1839 default: 1840 ND_PRINT((ndo,"router renum: code-#%d", rr6->rr_code)); 1841 break; 1842 } 1843 1844 ND_PRINT((ndo,", seq=%u", EXTRACT_32BITS(&rr6->rr_seqnum))); 1845 1846 if (ndo->ndo_vflag) { 1847 #define F(x, y) ((rr6->rr_flags) & (x) ? (y) : "") 1848 ND_PRINT((ndo,"[")); /*]*/ 1849 if (rr6->rr_flags) { 1850 ND_PRINT((ndo,"%s%s%s%s%s,", F(ICMP6_RR_FLAGS_TEST, "T"), 1851 F(ICMP6_RR_FLAGS_REQRESULT, "R"), 1852 F(ICMP6_RR_FLAGS_FORCEAPPLY, "A"), 1853 F(ICMP6_RR_FLAGS_SPECSITE, "S"), 1854 F(ICMP6_RR_FLAGS_PREVDONE, "P"))); 1855 } 1856 ND_PRINT((ndo,"seg=%u,", rr6->rr_segnum)); 1857 ND_PRINT((ndo,"maxdelay=%u", EXTRACT_16BITS(&rr6->rr_maxdelay))); 1858 if (rr6->rr_reserved) 1859 ND_PRINT((ndo,"rsvd=0x%x", EXTRACT_32BITS(&rr6->rr_reserved))); 1860 /*[*/ 1861 ND_PRINT((ndo,"]")); 1862 #undef F 1863 } 1864 1865 if (rr6->rr_code == ICMP6_ROUTER_RENUMBERING_COMMAND) { 1866 match = (const struct rr_pco_match *)cp; 1867 cp = (const char *)(match + 1); 1868 1869 ND_TCHECK(match->rpm_prefix); 1870 1871 if (ndo->ndo_vflag > 1) 1872 ND_PRINT((ndo,"\n\t")); 1873 else 1874 ND_PRINT((ndo," ")); 1875 ND_PRINT((ndo,"match(")); /*)*/ 1876 switch (match->rpm_code) { 1877 case RPM_PCO_ADD: ND_PRINT((ndo,"add")); break; 1878 case RPM_PCO_CHANGE: ND_PRINT((ndo,"change")); break; 1879 case RPM_PCO_SETGLOBAL: ND_PRINT((ndo,"setglobal")); break; 1880 default: ND_PRINT((ndo,"#%u", match->rpm_code)); break; 1881 } 1882 1883 if (ndo->ndo_vflag) { 1884 ND_PRINT((ndo,",ord=%u", match->rpm_ordinal)); 1885 ND_PRINT((ndo,",min=%u", match->rpm_minlen)); 1886 ND_PRINT((ndo,",max=%u", match->rpm_maxlen)); 1887 } 1888 if (addrtostr6(&match->rpm_prefix, hbuf, sizeof(hbuf))) 1889 ND_PRINT((ndo,",%s/%u", hbuf, match->rpm_matchlen)); 1890 else 1891 ND_PRINT((ndo,",?/%u", match->rpm_matchlen)); 1892 /*(*/ 1893 ND_PRINT((ndo,")")); 1894 1895 n = match->rpm_len - 3; 1896 if (n % 4) 1897 goto trunc; 1898 n /= 4; 1899 while (n-- > 0) { 1900 use = (const struct rr_pco_use *)cp; 1901 cp = (const char *)(use + 1); 1902 1903 ND_TCHECK(use->rpu_prefix); 1904 1905 if (ndo->ndo_vflag > 1) 1906 ND_PRINT((ndo,"\n\t")); 1907 else 1908 ND_PRINT((ndo," ")); 1909 ND_PRINT((ndo,"use(")); /*)*/ 1910 if (use->rpu_flags) { 1911 #define F(x, y) ((use->rpu_flags) & (x) ? (y) : "") 1912 ND_PRINT((ndo,"%s%s,", 1913 F(ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME, "V"), 1914 F(ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME, "P"))); 1915 #undef F 1916 } 1917 if (ndo->ndo_vflag) { 1918 ND_PRINT((ndo,"mask=0x%x,", use->rpu_ramask)); 1919 ND_PRINT((ndo,"raflags=0x%x,", use->rpu_raflags)); 1920 if (~use->rpu_vltime == 0) 1921 ND_PRINT((ndo,"vltime=infty,")); 1922 else 1923 ND_PRINT((ndo,"vltime=%u,", 1924 EXTRACT_32BITS(&use->rpu_vltime))); 1925 if (~use->rpu_pltime == 0) 1926 ND_PRINT((ndo,"pltime=infty,")); 1927 else 1928 ND_PRINT((ndo,"pltime=%u,", 1929 EXTRACT_32BITS(&use->rpu_pltime))); 1930 } 1931 if (addrtostr6(&use->rpu_prefix, hbuf, sizeof(hbuf))) 1932 ND_PRINT((ndo,"%s/%u/%u", hbuf, use->rpu_uselen, 1933 use->rpu_keeplen)); 1934 else 1935 ND_PRINT((ndo,"?/%u/%u", use->rpu_uselen, 1936 use->rpu_keeplen)); 1937 /*(*/ 1938 ND_PRINT((ndo,")")); 1939 } 1940 } 1941 1942 return; 1943 1944 trunc: 1945 ND_PRINT((ndo,"[|icmp6]")); 1946 } 1947 1948 /* 1949 * Local Variables: 1950 * c-style: whitesmith 1951 * c-basic-offset: 8 1952 * End: 1953 */ 1954