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 ND_TCHECK(dp->icmp6_data16[1]); 1135 if (dp->icmp6_data16[1] & 0xc0) 1136 ND_PRINT((ndo," ")); 1137 if (dp->icmp6_data16[1] & 0x80) 1138 ND_PRINT((ndo,"M")); 1139 if (dp->icmp6_data16[1] & 0x40) 1140 ND_PRINT((ndo,"O")); 1141 #define MPADVLEN 8 1142 icmp6_opt_print(ndo, (const u_char *)dp + MPADVLEN, 1143 length - MPADVLEN); 1144 } 1145 break; 1146 case ND_RPL_MESSAGE: 1147 /* plus 4, because struct icmp6_hdr contains 4 bytes of icmp payload */ 1148 rpl_print(ndo, dp, &dp->icmp6_data8[0], length-sizeof(struct icmp6_hdr)+4); 1149 break; 1150 default: 1151 ND_PRINT((ndo,", length %u", length)); 1152 if (ndo->ndo_vflag <= 1) 1153 print_unknown_data(ndo, bp,"\n\t", length); 1154 return; 1155 } 1156 if (!ndo->ndo_vflag) 1157 ND_PRINT((ndo,", length %u", length)); 1158 return; 1159 trunc: 1160 ND_PRINT((ndo, "[|icmp6]")); 1161 } 1162 1163 static const struct udphdr * 1164 get_upperlayer(netdissect_options *ndo, const u_char *bp, u_int *prot) 1165 { 1166 const u_char *ep; 1167 const struct ip6_hdr *ip6 = (const struct ip6_hdr *)bp; 1168 const struct udphdr *uh; 1169 const struct ip6_hbh *hbh; 1170 const struct ip6_frag *fragh; 1171 const struct ah *ah; 1172 u_int nh; 1173 int hlen; 1174 1175 /* 'ep' points to the end of available data. */ 1176 ep = ndo->ndo_snapend; 1177 1178 if (!ND_TTEST(ip6->ip6_nxt)) 1179 return NULL; 1180 1181 nh = ip6->ip6_nxt; 1182 hlen = sizeof(struct ip6_hdr); 1183 1184 while (bp < ep) { 1185 bp += hlen; 1186 1187 switch(nh) { 1188 case IPPROTO_UDP: 1189 case IPPROTO_TCP: 1190 uh = (const struct udphdr *)bp; 1191 if (ND_TTEST(uh->uh_dport)) { 1192 *prot = nh; 1193 return(uh); 1194 } 1195 else 1196 return(NULL); 1197 /* NOTREACHED */ 1198 1199 case IPPROTO_HOPOPTS: 1200 case IPPROTO_DSTOPTS: 1201 case IPPROTO_ROUTING: 1202 hbh = (const struct ip6_hbh *)bp; 1203 if (!ND_TTEST(hbh->ip6h_len)) 1204 return(NULL); 1205 nh = hbh->ip6h_nxt; 1206 hlen = (hbh->ip6h_len + 1) << 3; 1207 break; 1208 1209 case IPPROTO_FRAGMENT: /* this should be odd, but try anyway */ 1210 fragh = (const struct ip6_frag *)bp; 1211 if (!ND_TTEST(fragh->ip6f_offlg)) 1212 return(NULL); 1213 /* fragments with non-zero offset are meaningless */ 1214 if ((EXTRACT_16BITS(&fragh->ip6f_offlg) & IP6F_OFF_MASK) != 0) 1215 return(NULL); 1216 nh = fragh->ip6f_nxt; 1217 hlen = sizeof(struct ip6_frag); 1218 break; 1219 1220 case IPPROTO_AH: 1221 ah = (const struct ah *)bp; 1222 if (!ND_TTEST(ah->ah_len)) 1223 return(NULL); 1224 nh = ah->ah_nxt; 1225 hlen = (ah->ah_len + 2) << 2; 1226 break; 1227 1228 default: /* unknown or undecodable header */ 1229 *prot = nh; /* meaningless, but set here anyway */ 1230 return(NULL); 1231 } 1232 } 1233 1234 return(NULL); /* should be notreached, though */ 1235 } 1236 1237 static void 1238 icmp6_opt_print(netdissect_options *ndo, const u_char *bp, int resid) 1239 { 1240 const struct nd_opt_hdr *op; 1241 const struct nd_opt_prefix_info *opp; 1242 const struct nd_opt_mtu *opm; 1243 const struct nd_opt_rdnss *oprd; 1244 const struct nd_opt_dnssl *opds; 1245 const struct nd_opt_advinterval *opa; 1246 const struct nd_opt_homeagent_info *oph; 1247 const struct nd_opt_route_info *opri; 1248 const u_char *cp, *ep, *domp; 1249 struct in6_addr in6; 1250 const struct in6_addr *in6p; 1251 size_t l; 1252 u_int i; 1253 1254 #define ECHECK(var) if ((const u_char *)&(var) > ep - sizeof(var)) return 1255 1256 cp = bp; 1257 /* 'ep' points to the end of available data. */ 1258 ep = ndo->ndo_snapend; 1259 1260 while (cp < ep) { 1261 op = (const struct nd_opt_hdr *)cp; 1262 1263 ECHECK(op->nd_opt_len); 1264 if (resid <= 0) 1265 return; 1266 if (op->nd_opt_len == 0) 1267 goto trunc; 1268 if (cp + (op->nd_opt_len << 3) > ep) 1269 goto trunc; 1270 1271 ND_PRINT((ndo,"\n\t %s option (%u), length %u (%u): ", 1272 tok2str(icmp6_opt_values, "unknown", op->nd_opt_type), 1273 op->nd_opt_type, 1274 op->nd_opt_len << 3, 1275 op->nd_opt_len)); 1276 1277 switch (op->nd_opt_type) { 1278 case ND_OPT_SOURCE_LINKADDR: 1279 l = (op->nd_opt_len << 3) - 2; 1280 print_lladdr(ndo, cp + 2, l); 1281 break; 1282 case ND_OPT_TARGET_LINKADDR: 1283 l = (op->nd_opt_len << 3) - 2; 1284 print_lladdr(ndo, cp + 2, l); 1285 break; 1286 case ND_OPT_PREFIX_INFORMATION: 1287 opp = (const struct nd_opt_prefix_info *)op; 1288 ND_TCHECK(opp->nd_opt_pi_prefix); 1289 ND_PRINT((ndo,"%s/%u%s, Flags [%s], valid time %s", 1290 ip6addr_string(ndo, &opp->nd_opt_pi_prefix), 1291 opp->nd_opt_pi_prefix_len, 1292 (op->nd_opt_len != 4) ? "badlen" : "", 1293 bittok2str(icmp6_opt_pi_flag_values, "none", opp->nd_opt_pi_flags_reserved), 1294 get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_valid_time)))); 1295 ND_PRINT((ndo,", pref. time %s", get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_preferred_time)))); 1296 break; 1297 case ND_OPT_REDIRECTED_HEADER: 1298 print_unknown_data(ndo, bp,"\n\t ",op->nd_opt_len<<3); 1299 /* xxx */ 1300 break; 1301 case ND_OPT_MTU: 1302 opm = (const struct nd_opt_mtu *)op; 1303 ND_TCHECK(opm->nd_opt_mtu_mtu); 1304 ND_PRINT((ndo," %u%s", 1305 EXTRACT_32BITS(&opm->nd_opt_mtu_mtu), 1306 (op->nd_opt_len != 1) ? "bad option length" : "" )); 1307 break; 1308 case ND_OPT_RDNSS: 1309 oprd = (const struct nd_opt_rdnss *)op; 1310 l = (op->nd_opt_len - 1) / 2; 1311 ND_PRINT((ndo," lifetime %us,", 1312 EXTRACT_32BITS(&oprd->nd_opt_rdnss_lifetime))); 1313 for (i = 0; i < l; i++) { 1314 ND_TCHECK(oprd->nd_opt_rdnss_addr[i]); 1315 ND_PRINT((ndo," addr: %s", 1316 ip6addr_string(ndo, &oprd->nd_opt_rdnss_addr[i]))); 1317 } 1318 break; 1319 case ND_OPT_DNSSL: 1320 opds = (const struct nd_opt_dnssl *)op; 1321 ND_PRINT((ndo," lifetime %us, domain(s):", 1322 EXTRACT_32BITS(&opds->nd_opt_dnssl_lifetime))); 1323 domp = cp + 8; /* domain names, variable-sized, RFC1035-encoded */ 1324 while (domp < cp + (op->nd_opt_len << 3) && *domp != '\0') 1325 { 1326 ND_PRINT((ndo, " ")); 1327 if ((domp = ns_nprint (ndo, domp, bp)) == NULL) 1328 goto trunc; 1329 } 1330 break; 1331 case ND_OPT_ADVINTERVAL: 1332 opa = (const struct nd_opt_advinterval *)op; 1333 ND_TCHECK(opa->nd_opt_adv_interval); 1334 ND_PRINT((ndo," %ums", EXTRACT_32BITS(&opa->nd_opt_adv_interval))); 1335 break; 1336 case ND_OPT_HOMEAGENT_INFO: 1337 oph = (const struct nd_opt_homeagent_info *)op; 1338 ND_TCHECK(oph->nd_opt_hai_lifetime); 1339 ND_PRINT((ndo," preference %u, lifetime %u", 1340 EXTRACT_16BITS(&oph->nd_opt_hai_preference), 1341 EXTRACT_16BITS(&oph->nd_opt_hai_lifetime))); 1342 break; 1343 case ND_OPT_ROUTE_INFO: 1344 opri = (const struct nd_opt_route_info *)op; 1345 ND_TCHECK(opri->nd_opt_rti_lifetime); 1346 memset(&in6, 0, sizeof(in6)); 1347 in6p = (const struct in6_addr *)(opri + 1); 1348 switch (op->nd_opt_len) { 1349 case 1: 1350 break; 1351 case 2: 1352 ND_TCHECK2(*in6p, 8); 1353 memcpy(&in6, opri + 1, 8); 1354 break; 1355 case 3: 1356 ND_TCHECK(*in6p); 1357 memcpy(&in6, opri + 1, sizeof(in6)); 1358 break; 1359 default: 1360 goto trunc; 1361 } 1362 ND_PRINT((ndo," %s/%u", ip6addr_string(ndo, &in6), 1363 opri->nd_opt_rti_prefixlen)); 1364 ND_PRINT((ndo,", pref=%s", get_rtpref(opri->nd_opt_rti_flags))); 1365 ND_PRINT((ndo,", lifetime=%s", 1366 get_lifetime(EXTRACT_32BITS(&opri->nd_opt_rti_lifetime)))); 1367 break; 1368 default: 1369 if (ndo->ndo_vflag <= 1) { 1370 print_unknown_data(ndo,cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */ 1371 return; 1372 } 1373 break; 1374 } 1375 /* do we want to see an additional hexdump ? */ 1376 if (ndo->ndo_vflag> 1) 1377 print_unknown_data(ndo, cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */ 1378 1379 cp += op->nd_opt_len << 3; 1380 resid -= op->nd_opt_len << 3; 1381 } 1382 return; 1383 1384 trunc: 1385 ND_PRINT((ndo, "[ndp opt]")); 1386 return; 1387 #undef ECHECK 1388 } 1389 1390 static void 1391 mld6_print(netdissect_options *ndo, const u_char *bp) 1392 { 1393 const struct mld6_hdr *mp = (const struct mld6_hdr *)bp; 1394 const u_char *ep; 1395 1396 /* 'ep' points to the end of available data. */ 1397 ep = ndo->ndo_snapend; 1398 1399 if ((const u_char *)mp + sizeof(*mp) > ep) 1400 return; 1401 1402 ND_PRINT((ndo,"max resp delay: %d ", EXTRACT_16BITS(&mp->mld6_maxdelay))); 1403 ND_PRINT((ndo,"addr: %s", ip6addr_string(ndo, &mp->mld6_addr))); 1404 } 1405 1406 static void 1407 mldv2_report_print(netdissect_options *ndo, const u_char *bp, u_int len) 1408 { 1409 const struct icmp6_hdr *icp = (const struct icmp6_hdr *) bp; 1410 u_int group, nsrcs, ngroups; 1411 u_int i, j; 1412 1413 /* Minimum len is 8 */ 1414 if (len < 8) { 1415 ND_PRINT((ndo," [invalid len %d]", len)); 1416 return; 1417 } 1418 1419 ND_TCHECK(icp->icmp6_data16[1]); 1420 ngroups = EXTRACT_16BITS(&icp->icmp6_data16[1]); 1421 ND_PRINT((ndo,", %d group record(s)", ngroups)); 1422 if (ndo->ndo_vflag > 0) { 1423 /* Print the group records */ 1424 group = 8; 1425 for (i = 0; i < ngroups; i++) { 1426 /* type(1) + auxlen(1) + numsrc(2) + grp(16) */ 1427 if (len < group + 20) { 1428 ND_PRINT((ndo," [invalid number of groups]")); 1429 return; 1430 } 1431 ND_TCHECK2(bp[group + 4], sizeof(struct in6_addr)); 1432 ND_PRINT((ndo," [gaddr %s", ip6addr_string(ndo, &bp[group + 4]))); 1433 ND_PRINT((ndo," %s", tok2str(mldv2report2str, " [v2-report-#%d]", 1434 bp[group]))); 1435 nsrcs = (bp[group + 2] << 8) + bp[group + 3]; 1436 /* Check the number of sources and print them */ 1437 if (len < group + 20 + (nsrcs * sizeof(struct in6_addr))) { 1438 ND_PRINT((ndo," [invalid number of sources %d]", nsrcs)); 1439 return; 1440 } 1441 if (ndo->ndo_vflag == 1) 1442 ND_PRINT((ndo,", %d source(s)", nsrcs)); 1443 else { 1444 /* Print the sources */ 1445 ND_PRINT((ndo," {")); 1446 for (j = 0; j < nsrcs; j++) { 1447 ND_TCHECK2(bp[group + 20 + j * sizeof(struct in6_addr)], 1448 sizeof(struct in6_addr)); 1449 ND_PRINT((ndo," %s", ip6addr_string(ndo, &bp[group + 20 + j * sizeof(struct in6_addr)]))); 1450 } 1451 ND_PRINT((ndo," }")); 1452 } 1453 /* Next group record */ 1454 group += 20 + nsrcs * sizeof(struct in6_addr); 1455 ND_PRINT((ndo,"]")); 1456 } 1457 } 1458 return; 1459 trunc: 1460 ND_PRINT((ndo,"[|icmp6]")); 1461 return; 1462 } 1463 1464 static void 1465 mldv2_query_print(netdissect_options *ndo, const u_char *bp, u_int len) 1466 { 1467 const struct icmp6_hdr *icp = (const struct icmp6_hdr *) bp; 1468 u_int mrc; 1469 int mrt, qqi; 1470 u_int nsrcs; 1471 register u_int i; 1472 1473 /* Minimum len is 28 */ 1474 if (len < 28) { 1475 ND_PRINT((ndo," [invalid len %d]", len)); 1476 return; 1477 } 1478 ND_TCHECK(icp->icmp6_data16[0]); 1479 mrc = EXTRACT_16BITS(&icp->icmp6_data16[0]); 1480 if (mrc < 32768) { 1481 mrt = mrc; 1482 } else { 1483 mrt = ((mrc & 0x0fff) | 0x1000) << (((mrc & 0x7000) >> 12) + 3); 1484 } 1485 if (ndo->ndo_vflag) { 1486 ND_PRINT((ndo," [max resp delay=%d]", mrt)); 1487 } 1488 ND_TCHECK2(bp[8], sizeof(struct in6_addr)); 1489 ND_PRINT((ndo," [gaddr %s", ip6addr_string(ndo, &bp[8]))); 1490 1491 if (ndo->ndo_vflag) { 1492 ND_TCHECK(bp[25]); 1493 if (bp[24] & 0x08) { 1494 ND_PRINT((ndo," sflag")); 1495 } 1496 if (bp[24] & 0x07) { 1497 ND_PRINT((ndo," robustness=%d", bp[24] & 0x07)); 1498 } 1499 if (bp[25] < 128) { 1500 qqi = bp[25]; 1501 } else { 1502 qqi = ((bp[25] & 0x0f) | 0x10) << (((bp[25] & 0x70) >> 4) + 3); 1503 } 1504 ND_PRINT((ndo," qqi=%d", qqi)); 1505 } 1506 1507 ND_TCHECK2(bp[26], 2); 1508 nsrcs = EXTRACT_16BITS(&bp[26]); 1509 if (nsrcs > 0) { 1510 if (len < 28 + nsrcs * sizeof(struct in6_addr)) 1511 ND_PRINT((ndo," [invalid number of sources]")); 1512 else if (ndo->ndo_vflag > 1) { 1513 ND_PRINT((ndo," {")); 1514 for (i = 0; i < nsrcs; i++) { 1515 ND_TCHECK2(bp[28 + i * sizeof(struct in6_addr)], 1516 sizeof(struct in6_addr)); 1517 ND_PRINT((ndo," %s", ip6addr_string(ndo, &bp[28 + i * sizeof(struct in6_addr)]))); 1518 } 1519 ND_PRINT((ndo," }")); 1520 } else 1521 ND_PRINT((ndo,", %d source(s)", nsrcs)); 1522 } 1523 ND_PRINT((ndo,"]")); 1524 return; 1525 trunc: 1526 ND_PRINT((ndo,"[|icmp6]")); 1527 return; 1528 } 1529 1530 static void 1531 dnsname_print(netdissect_options *ndo, const u_char *cp, const u_char *ep) 1532 { 1533 int i; 1534 1535 /* DNS name decoding - no decompression */ 1536 ND_PRINT((ndo,", \"")); 1537 while (cp < ep) { 1538 i = *cp++; 1539 if (i) { 1540 if (i > ep - cp) { 1541 ND_PRINT((ndo,"???")); 1542 break; 1543 } 1544 while (i-- && cp < ep) { 1545 safeputchar(ndo, *cp); 1546 cp++; 1547 } 1548 if (cp + 1 < ep && *cp) 1549 ND_PRINT((ndo,".")); 1550 } else { 1551 if (cp == ep) { 1552 /* FQDN */ 1553 ND_PRINT((ndo,".")); 1554 } else if (cp + 1 == ep && *cp == '\0') { 1555 /* truncated */ 1556 } else { 1557 /* invalid */ 1558 ND_PRINT((ndo,"???")); 1559 } 1560 break; 1561 } 1562 } 1563 ND_PRINT((ndo,"\"")); 1564 } 1565 1566 static void 1567 icmp6_nodeinfo_print(netdissect_options *ndo, u_int icmp6len, const u_char *bp, const u_char *ep) 1568 { 1569 const struct icmp6_nodeinfo *ni6; 1570 const struct icmp6_hdr *dp; 1571 const u_char *cp; 1572 size_t siz, i; 1573 int needcomma; 1574 1575 if (ep < bp) 1576 return; 1577 dp = (const struct icmp6_hdr *)bp; 1578 ni6 = (const struct icmp6_nodeinfo *)bp; 1579 siz = ep - bp; 1580 1581 switch (ni6->ni_type) { 1582 case ICMP6_NI_QUERY: 1583 if (siz == sizeof(*dp) + 4) { 1584 /* KAME who-are-you */ 1585 ND_PRINT((ndo," who-are-you request")); 1586 break; 1587 } 1588 ND_PRINT((ndo," node information query")); 1589 1590 ND_TCHECK2(*dp, sizeof(*ni6)); 1591 ni6 = (const struct icmp6_nodeinfo *)dp; 1592 ND_PRINT((ndo," (")); /*)*/ 1593 switch (EXTRACT_16BITS(&ni6->ni_qtype)) { 1594 case NI_QTYPE_NOOP: 1595 ND_PRINT((ndo,"noop")); 1596 break; 1597 case NI_QTYPE_SUPTYPES: 1598 ND_PRINT((ndo,"supported qtypes")); 1599 i = EXTRACT_16BITS(&ni6->ni_flags); 1600 if (i) 1601 ND_PRINT((ndo," [%s]", (i & 0x01) ? "C" : "")); 1602 break; 1603 case NI_QTYPE_FQDN: 1604 ND_PRINT((ndo,"DNS name")); 1605 break; 1606 case NI_QTYPE_NODEADDR: 1607 ND_PRINT((ndo,"node addresses")); 1608 i = ni6->ni_flags; 1609 if (!i) 1610 break; 1611 /* NI_NODEADDR_FLAG_TRUNCATE undefined for query */ 1612 ND_PRINT((ndo," [%s%s%s%s%s%s]", 1613 (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "", 1614 (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "", 1615 (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "", 1616 (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "", 1617 (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "", 1618 (i & NI_NODEADDR_FLAG_ALL) ? "A" : "")); 1619 break; 1620 default: 1621 ND_PRINT((ndo,"unknown")); 1622 break; 1623 } 1624 1625 if (ni6->ni_qtype == NI_QTYPE_NOOP || 1626 ni6->ni_qtype == NI_QTYPE_SUPTYPES) { 1627 if (siz != sizeof(*ni6)) 1628 if (ndo->ndo_vflag) 1629 ND_PRINT((ndo,", invalid len")); 1630 /*(*/ 1631 ND_PRINT((ndo,")")); 1632 break; 1633 } 1634 1635 1636 /* XXX backward compat, icmp-name-lookup-03 */ 1637 if (siz == sizeof(*ni6)) { 1638 ND_PRINT((ndo,", 03 draft")); 1639 /*(*/ 1640 ND_PRINT((ndo,")")); 1641 break; 1642 } 1643 1644 switch (ni6->ni_code) { 1645 case ICMP6_NI_SUBJ_IPV6: 1646 if (!ND_TTEST2(*dp, 1647 sizeof(*ni6) + sizeof(struct in6_addr))) 1648 break; 1649 if (siz != sizeof(*ni6) + sizeof(struct in6_addr)) { 1650 if (ndo->ndo_vflag) 1651 ND_PRINT((ndo,", invalid subject len")); 1652 break; 1653 } 1654 ND_PRINT((ndo,", subject=%s", 1655 ip6addr_string(ndo, ni6 + 1))); 1656 break; 1657 case ICMP6_NI_SUBJ_FQDN: 1658 ND_PRINT((ndo,", subject=DNS name")); 1659 cp = (const u_char *)(ni6 + 1); 1660 if (cp[0] == ep - cp - 1) { 1661 /* icmp-name-lookup-03, pascal string */ 1662 if (ndo->ndo_vflag) 1663 ND_PRINT((ndo,", 03 draft")); 1664 cp++; 1665 ND_PRINT((ndo,", \"")); 1666 while (cp < ep) { 1667 safeputchar(ndo, *cp); 1668 cp++; 1669 } 1670 ND_PRINT((ndo,"\"")); 1671 } else 1672 dnsname_print(ndo, cp, ep); 1673 break; 1674 case ICMP6_NI_SUBJ_IPV4: 1675 if (!ND_TTEST2(*dp, sizeof(*ni6) + sizeof(struct in_addr))) 1676 break; 1677 if (siz != sizeof(*ni6) + sizeof(struct in_addr)) { 1678 if (ndo->ndo_vflag) 1679 ND_PRINT((ndo,", invalid subject len")); 1680 break; 1681 } 1682 ND_PRINT((ndo,", subject=%s", 1683 ipaddr_string(ndo, ni6 + 1))); 1684 break; 1685 default: 1686 ND_PRINT((ndo,", unknown subject")); 1687 break; 1688 } 1689 1690 /*(*/ 1691 ND_PRINT((ndo,")")); 1692 break; 1693 1694 case ICMP6_NI_REPLY: 1695 if (icmp6len > siz) { 1696 ND_PRINT((ndo,"[|icmp6: node information reply]")); 1697 break; 1698 } 1699 1700 needcomma = 0; 1701 1702 ND_TCHECK2(*dp, sizeof(*ni6)); 1703 ni6 = (const struct icmp6_nodeinfo *)dp; 1704 ND_PRINT((ndo," node information reply")); 1705 ND_PRINT((ndo," (")); /*)*/ 1706 switch (ni6->ni_code) { 1707 case ICMP6_NI_SUCCESS: 1708 if (ndo->ndo_vflag) { 1709 ND_PRINT((ndo,"success")); 1710 needcomma++; 1711 } 1712 break; 1713 case ICMP6_NI_REFUSED: 1714 ND_PRINT((ndo,"refused")); 1715 needcomma++; 1716 if (siz != sizeof(*ni6)) 1717 if (ndo->ndo_vflag) 1718 ND_PRINT((ndo,", invalid length")); 1719 break; 1720 case ICMP6_NI_UNKNOWN: 1721 ND_PRINT((ndo,"unknown")); 1722 needcomma++; 1723 if (siz != sizeof(*ni6)) 1724 if (ndo->ndo_vflag) 1725 ND_PRINT((ndo,", invalid length")); 1726 break; 1727 } 1728 1729 if (ni6->ni_code != ICMP6_NI_SUCCESS) { 1730 /*(*/ 1731 ND_PRINT((ndo,")")); 1732 break; 1733 } 1734 1735 switch (EXTRACT_16BITS(&ni6->ni_qtype)) { 1736 case NI_QTYPE_NOOP: 1737 if (needcomma) 1738 ND_PRINT((ndo,", ")); 1739 ND_PRINT((ndo,"noop")); 1740 if (siz != sizeof(*ni6)) 1741 if (ndo->ndo_vflag) 1742 ND_PRINT((ndo,", invalid length")); 1743 break; 1744 case NI_QTYPE_SUPTYPES: 1745 if (needcomma) 1746 ND_PRINT((ndo,", ")); 1747 ND_PRINT((ndo,"supported qtypes")); 1748 i = EXTRACT_16BITS(&ni6->ni_flags); 1749 if (i) 1750 ND_PRINT((ndo," [%s]", (i & 0x01) ? "C" : "")); 1751 break; 1752 case NI_QTYPE_FQDN: 1753 if (needcomma) 1754 ND_PRINT((ndo,", ")); 1755 ND_PRINT((ndo,"DNS name")); 1756 cp = (const u_char *)(ni6 + 1) + 4; 1757 ND_TCHECK(cp[0]); 1758 if (cp[0] == ep - cp - 1) { 1759 /* icmp-name-lookup-03, pascal string */ 1760 if (ndo->ndo_vflag) 1761 ND_PRINT((ndo,", 03 draft")); 1762 cp++; 1763 ND_PRINT((ndo,", \"")); 1764 while (cp < ep) { 1765 safeputchar(ndo, *cp); 1766 cp++; 1767 } 1768 ND_PRINT((ndo,"\"")); 1769 } else 1770 dnsname_print(ndo, cp, ep); 1771 if ((EXTRACT_16BITS(&ni6->ni_flags) & 0x01) != 0) 1772 ND_PRINT((ndo," [TTL=%u]", EXTRACT_32BITS(ni6 + 1))); 1773 break; 1774 case NI_QTYPE_NODEADDR: 1775 if (needcomma) 1776 ND_PRINT((ndo,", ")); 1777 ND_PRINT((ndo,"node addresses")); 1778 i = sizeof(*ni6); 1779 while (i < siz) { 1780 if (i + sizeof(struct in6_addr) + sizeof(int32_t) > siz) 1781 break; 1782 ND_PRINT((ndo," %s", ip6addr_string(ndo, bp + i))); 1783 i += sizeof(struct in6_addr); 1784 ND_PRINT((ndo,"(%d)", (int32_t)EXTRACT_32BITS(bp + i))); 1785 i += sizeof(int32_t); 1786 } 1787 i = ni6->ni_flags; 1788 if (!i) 1789 break; 1790 ND_PRINT((ndo," [%s%s%s%s%s%s%s]", 1791 (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "", 1792 (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "", 1793 (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "", 1794 (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "", 1795 (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "", 1796 (i & NI_NODEADDR_FLAG_ALL) ? "A" : "", 1797 (i & NI_NODEADDR_FLAG_TRUNCATE) ? "T" : "")); 1798 break; 1799 default: 1800 if (needcomma) 1801 ND_PRINT((ndo,", ")); 1802 ND_PRINT((ndo,"unknown")); 1803 break; 1804 } 1805 1806 /*(*/ 1807 ND_PRINT((ndo,")")); 1808 break; 1809 } 1810 return; 1811 1812 trunc: 1813 ND_PRINT((ndo, "[|icmp6]")); 1814 } 1815 1816 static void 1817 icmp6_rrenum_print(netdissect_options *ndo, const u_char *bp, const u_char *ep) 1818 { 1819 const struct icmp6_router_renum *rr6; 1820 const char *cp; 1821 const struct rr_pco_match *match; 1822 const struct rr_pco_use *use; 1823 char hbuf[NI_MAXHOST]; 1824 int n; 1825 1826 if (ep < bp) 1827 return; 1828 rr6 = (const struct icmp6_router_renum *)bp; 1829 cp = (const char *)(rr6 + 1); 1830 1831 ND_TCHECK(rr6->rr_reserved); 1832 switch (rr6->rr_code) { 1833 case ICMP6_ROUTER_RENUMBERING_COMMAND: 1834 ND_PRINT((ndo,"router renum: command")); 1835 break; 1836 case ICMP6_ROUTER_RENUMBERING_RESULT: 1837 ND_PRINT((ndo,"router renum: result")); 1838 break; 1839 case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET: 1840 ND_PRINT((ndo,"router renum: sequence number reset")); 1841 break; 1842 default: 1843 ND_PRINT((ndo,"router renum: code-#%d", rr6->rr_code)); 1844 break; 1845 } 1846 1847 ND_PRINT((ndo,", seq=%u", EXTRACT_32BITS(&rr6->rr_seqnum))); 1848 1849 if (ndo->ndo_vflag) { 1850 #define F(x, y) ((rr6->rr_flags) & (x) ? (y) : "") 1851 ND_PRINT((ndo,"[")); /*]*/ 1852 if (rr6->rr_flags) { 1853 ND_PRINT((ndo,"%s%s%s%s%s,", F(ICMP6_RR_FLAGS_TEST, "T"), 1854 F(ICMP6_RR_FLAGS_REQRESULT, "R"), 1855 F(ICMP6_RR_FLAGS_FORCEAPPLY, "A"), 1856 F(ICMP6_RR_FLAGS_SPECSITE, "S"), 1857 F(ICMP6_RR_FLAGS_PREVDONE, "P"))); 1858 } 1859 ND_PRINT((ndo,"seg=%u,", rr6->rr_segnum)); 1860 ND_PRINT((ndo,"maxdelay=%u", EXTRACT_16BITS(&rr6->rr_maxdelay))); 1861 if (rr6->rr_reserved) 1862 ND_PRINT((ndo,"rsvd=0x%x", EXTRACT_32BITS(&rr6->rr_reserved))); 1863 /*[*/ 1864 ND_PRINT((ndo,"]")); 1865 #undef F 1866 } 1867 1868 if (rr6->rr_code == ICMP6_ROUTER_RENUMBERING_COMMAND) { 1869 match = (const struct rr_pco_match *)cp; 1870 cp = (const char *)(match + 1); 1871 1872 ND_TCHECK(match->rpm_prefix); 1873 1874 if (ndo->ndo_vflag > 1) 1875 ND_PRINT((ndo,"\n\t")); 1876 else 1877 ND_PRINT((ndo," ")); 1878 ND_PRINT((ndo,"match(")); /*)*/ 1879 switch (match->rpm_code) { 1880 case RPM_PCO_ADD: ND_PRINT((ndo,"add")); break; 1881 case RPM_PCO_CHANGE: ND_PRINT((ndo,"change")); break; 1882 case RPM_PCO_SETGLOBAL: ND_PRINT((ndo,"setglobal")); break; 1883 default: ND_PRINT((ndo,"#%u", match->rpm_code)); break; 1884 } 1885 1886 if (ndo->ndo_vflag) { 1887 ND_PRINT((ndo,",ord=%u", match->rpm_ordinal)); 1888 ND_PRINT((ndo,",min=%u", match->rpm_minlen)); 1889 ND_PRINT((ndo,",max=%u", match->rpm_maxlen)); 1890 } 1891 if (addrtostr6(&match->rpm_prefix, hbuf, sizeof(hbuf))) 1892 ND_PRINT((ndo,",%s/%u", hbuf, match->rpm_matchlen)); 1893 else 1894 ND_PRINT((ndo,",?/%u", match->rpm_matchlen)); 1895 /*(*/ 1896 ND_PRINT((ndo,")")); 1897 1898 n = match->rpm_len - 3; 1899 if (n % 4) 1900 goto trunc; 1901 n /= 4; 1902 while (n-- > 0) { 1903 use = (const struct rr_pco_use *)cp; 1904 cp = (const char *)(use + 1); 1905 1906 ND_TCHECK(use->rpu_prefix); 1907 1908 if (ndo->ndo_vflag > 1) 1909 ND_PRINT((ndo,"\n\t")); 1910 else 1911 ND_PRINT((ndo," ")); 1912 ND_PRINT((ndo,"use(")); /*)*/ 1913 if (use->rpu_flags) { 1914 #define F(x, y) ((use->rpu_flags) & (x) ? (y) : "") 1915 ND_PRINT((ndo,"%s%s,", 1916 F(ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME, "V"), 1917 F(ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME, "P"))); 1918 #undef F 1919 } 1920 if (ndo->ndo_vflag) { 1921 ND_PRINT((ndo,"mask=0x%x,", use->rpu_ramask)); 1922 ND_PRINT((ndo,"raflags=0x%x,", use->rpu_raflags)); 1923 if (~use->rpu_vltime == 0) 1924 ND_PRINT((ndo,"vltime=infty,")); 1925 else 1926 ND_PRINT((ndo,"vltime=%u,", 1927 EXTRACT_32BITS(&use->rpu_vltime))); 1928 if (~use->rpu_pltime == 0) 1929 ND_PRINT((ndo,"pltime=infty,")); 1930 else 1931 ND_PRINT((ndo,"pltime=%u,", 1932 EXTRACT_32BITS(&use->rpu_pltime))); 1933 } 1934 if (addrtostr6(&use->rpu_prefix, hbuf, sizeof(hbuf))) 1935 ND_PRINT((ndo,"%s/%u/%u", hbuf, use->rpu_uselen, 1936 use->rpu_keeplen)); 1937 else 1938 ND_PRINT((ndo,"?/%u/%u", use->rpu_uselen, 1939 use->rpu_keeplen)); 1940 /*(*/ 1941 ND_PRINT((ndo,")")); 1942 } 1943 } 1944 1945 return; 1946 1947 trunc: 1948 ND_PRINT((ndo,"[|icmp6]")); 1949 } 1950 1951 /* 1952 * Local Variables: 1953 * c-style: whitesmith 1954 * c-basic-offset: 8 1955 * End: 1956 */ 1957
