1/* @(#) $Header: /tcpdump/master/tcpdump/icmp6.h,v 1.18 2007-08-29 02:31:44 mcr Exp $ (LBL) */ 2/* NetBSD: icmp6.h,v 1.13 2000/08/03 16:30:37 itojun Exp */ 3/* $KAME: icmp6.h,v 1.22 2000/08/03 15:25:16 jinmei Exp $ */ 4 5/* 6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34/* 35 * Copyright (c) 1982, 1986, 1993 36 * The Regents of the University of California. All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. All advertising materials mentioning features or use of this software 47 * must display the following acknowledgement: 48 * This product includes software developed by the University of 49 * California, Berkeley and its contributors. 50 * 4. Neither the name of the University nor the names of its contributors 51 * may be used to endorse or promote products derived from this software 52 * without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 64 * SUCH DAMAGE. 65 * 66 * @(#)ip_icmp.h 8.1 (Berkeley) 6/10/93 67 */ 68 69#ifndef _NETINET_ICMP6_H_ 70#define _NETINET_ICMP6_H_ 71 72struct icmp6_hdr { 73 u_int8_t icmp6_type; /* type field */ 74 u_int8_t icmp6_code; /* code field */ 75 u_int16_t icmp6_cksum; /* checksum field */ 76 union { 77 u_int32_t icmp6_un_data32[1]; /* type-specific field */ 78 u_int16_t icmp6_un_data16[2]; /* type-specific field */ 79 u_int8_t icmp6_un_data8[4]; /* type-specific field */ 80 } icmp6_dataun; 81}; 82 83#define icmp6_data32 icmp6_dataun.icmp6_un_data32 84#define icmp6_data16 icmp6_dataun.icmp6_un_data16 85#define icmp6_data8 icmp6_dataun.icmp6_un_data8 86#define icmp6_pptr icmp6_data32[0] /* parameter prob */ 87#define icmp6_mtu icmp6_data32[0] /* packet too big */ 88#define icmp6_id icmp6_data16[0] /* echo request/reply */ 89#define icmp6_seq icmp6_data16[1] /* echo request/reply */ 90#define icmp6_maxdelay icmp6_data16[0] /* mcast group membership */ 91 92#define ICMP6_DST_UNREACH 1 /* dest unreachable, codes: */ 93#define ICMP6_PACKET_TOO_BIG 2 /* packet too big */ 94#define ICMP6_TIME_EXCEEDED 3 /* time exceeded, code: */ 95#define ICMP6_PARAM_PROB 4 /* ip6 header bad */ 96 97#define ICMP6_ECHO_REQUEST 128 /* echo service */ 98#define ICMP6_ECHO_REPLY 129 /* echo reply */ 99#define ICMP6_MEMBERSHIP_QUERY 130 /* group membership query */ 100#define MLD6_LISTENER_QUERY 130 /* multicast listener query */ 101#define ICMP6_MEMBERSHIP_REPORT 131 /* group membership report */ 102#define MLD6_LISTENER_REPORT 131 /* multicast listener report */ 103#define ICMP6_MEMBERSHIP_REDUCTION 132 /* group membership termination */ 104#define MLD6_LISTENER_DONE 132 /* multicast listener done */ 105 106#define ND_ROUTER_SOLICIT 133 /* router solicitation */ 107#define ND_ROUTER_ADVERT 134 /* router advertisement */ 108#define ND_NEIGHBOR_SOLICIT 135 /* neighbor solicitation */ 109#define ND_NEIGHBOR_ADVERT 136 /* neighbor advertisement */ 110#define ND_REDIRECT 137 /* redirect */ 111 112#define ICMP6_ROUTER_RENUMBERING 138 /* router renumbering */ 113 114#define ICMP6_WRUREQUEST 139 /* who are you request */ 115#define ICMP6_WRUREPLY 140 /* who are you reply */ 116#define ICMP6_FQDN_QUERY 139 /* FQDN query */ 117#define ICMP6_FQDN_REPLY 140 /* FQDN reply */ 118#define ICMP6_NI_QUERY 139 /* node information request */ 119#define ICMP6_NI_REPLY 140 /* node information reply */ 120#define IND_SOLICIT 141 /* inverse neighbor solicitation */ 121#define IND_ADVERT 142 /* inverse neighbor advertisement */ 122 123#define ICMP6_V2_MEMBERSHIP_REPORT 143 /* v2 membership report */ 124#define MLDV2_LISTENER_REPORT 143 /* v2 multicast listener report */ 125#define ICMP6_HADISCOV_REQUEST 144 126#define ICMP6_HADISCOV_REPLY 145 127#define ICMP6_MOBILEPREFIX_SOLICIT 146 128#define ICMP6_MOBILEPREFIX_ADVERT 147 129 130#define MLD6_MTRACE_RESP 200 /* mtrace response(to sender) */ 131#define MLD6_MTRACE 201 /* mtrace messages */ 132 133#define ICMP6_MAXTYPE 201 134 135#define ICMP6_DST_UNREACH_NOROUTE 0 /* no route to destination */ 136#define ICMP6_DST_UNREACH_ADMIN 1 /* administratively prohibited */ 137#define ICMP6_DST_UNREACH_NOTNEIGHBOR 2 /* not a neighbor(obsolete) */ 138#define ICMP6_DST_UNREACH_BEYONDSCOPE 2 /* beyond scope of source address */ 139#define ICMP6_DST_UNREACH_ADDR 3 /* address unreachable */ 140#define ICMP6_DST_UNREACH_NOPORT 4 /* port unreachable */ 141 142#define ICMP6_TIME_EXCEED_TRANSIT 0 /* ttl==0 in transit */ 143#define ICMP6_TIME_EXCEED_REASSEMBLY 1 /* ttl==0 in reass */ 144 145#define ICMP6_PARAMPROB_HEADER 0 /* erroneous header field */ 146#define ICMP6_PARAMPROB_NEXTHEADER 1 /* unrecognized next header */ 147#define ICMP6_PARAMPROB_OPTION 2 /* unrecognized option */ 148 149#define ICMP6_INFOMSG_MASK 0x80 /* all informational messages */ 150 151#define ICMP6_NI_SUBJ_IPV6 0 /* Query Subject is an IPv6 address */ 152#define ICMP6_NI_SUBJ_FQDN 1 /* Query Subject is a Domain name */ 153#define ICMP6_NI_SUBJ_IPV4 2 /* Query Subject is an IPv4 address */ 154 155#define ICMP6_NI_SUCCESS 0 /* node information successful reply */ 156#define ICMP6_NI_REFUSED 1 /* node information request is refused */ 157#define ICMP6_NI_UNKNOWN 2 /* unknown Qtype */ 158 159#define ICMP6_ROUTER_RENUMBERING_COMMAND 0 /* rr command */ 160#define ICMP6_ROUTER_RENUMBERING_RESULT 1 /* rr result */ 161#define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET 255 /* rr seq num reset */ 162 163/* Used in kernel only */ 164#define ND_REDIRECT_ONLINK 0 /* redirect to an on-link node */ 165#define ND_REDIRECT_ROUTER 1 /* redirect to a better router */ 166 167/* 168 * Multicast Listener Discovery 169 */ 170struct mld6_hdr { 171 struct icmp6_hdr mld6_hdr; 172 struct in6_addr mld6_addr; /* multicast address */ 173}; 174 175#define mld6_type mld6_hdr.icmp6_type 176#define mld6_code mld6_hdr.icmp6_code 177#define mld6_cksum mld6_hdr.icmp6_cksum 178#define mld6_maxdelay mld6_hdr.icmp6_data16[0] 179#define mld6_reserved mld6_hdr.icmp6_data16[1] 180 181#define MLD_MINLEN 24 182#define MLDV2_MINLEN 28 183 184/* 185 * Neighbor Discovery 186 */ 187 188struct nd_router_solicit { /* router solicitation */ 189 struct icmp6_hdr nd_rs_hdr; 190 /* could be followed by options */ 191}; 192 193#define nd_rs_type nd_rs_hdr.icmp6_type 194#define nd_rs_code nd_rs_hdr.icmp6_code 195#define nd_rs_cksum nd_rs_hdr.icmp6_cksum 196#define nd_rs_reserved nd_rs_hdr.icmp6_data32[0] 197 198struct nd_router_advert { /* router advertisement */ 199 struct icmp6_hdr nd_ra_hdr; 200 u_int32_t nd_ra_reachable; /* reachable time */ 201 u_int32_t nd_ra_retransmit; /* retransmit timer */ 202 /* could be followed by options */ 203}; 204 205#define nd_ra_type nd_ra_hdr.icmp6_type 206#define nd_ra_code nd_ra_hdr.icmp6_code 207#define nd_ra_cksum nd_ra_hdr.icmp6_cksum 208#define nd_ra_curhoplimit nd_ra_hdr.icmp6_data8[0] 209#define nd_ra_flags_reserved nd_ra_hdr.icmp6_data8[1] 210#define ND_RA_FLAG_MANAGED 0x80 211#define ND_RA_FLAG_OTHER 0x40 212#define ND_RA_FLAG_HOME_AGENT 0x20 213 214/* 215 * Router preference values based on draft-draves-ipngwg-router-selection-01. 216 * These are non-standard definitions. 217 */ 218#define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */ 219 220#define ND_RA_FLAG_RTPREF_HIGH 0x08 /* 00001000 */ 221#define ND_RA_FLAG_RTPREF_MEDIUM 0x00 /* 00000000 */ 222#define ND_RA_FLAG_RTPREF_LOW 0x18 /* 00011000 */ 223#define ND_RA_FLAG_RTPREF_RSV 0x10 /* 00010000 */ 224 225#define nd_ra_router_lifetime nd_ra_hdr.icmp6_data16[1] 226 227struct nd_neighbor_solicit { /* neighbor solicitation */ 228 struct icmp6_hdr nd_ns_hdr; 229 struct in6_addr nd_ns_target; /*target address */ 230 /* could be followed by options */ 231}; 232 233#define nd_ns_type nd_ns_hdr.icmp6_type 234#define nd_ns_code nd_ns_hdr.icmp6_code 235#define nd_ns_cksum nd_ns_hdr.icmp6_cksum 236#define nd_ns_reserved nd_ns_hdr.icmp6_data32[0] 237 238struct nd_neighbor_advert { /* neighbor advertisement */ 239 struct icmp6_hdr nd_na_hdr; 240 struct in6_addr nd_na_target; /* target address */ 241 /* could be followed by options */ 242}; 243 244#define nd_na_type nd_na_hdr.icmp6_type 245#define nd_na_code nd_na_hdr.icmp6_code 246#define nd_na_cksum nd_na_hdr.icmp6_cksum 247#define nd_na_flags_reserved nd_na_hdr.icmp6_data32[0] 248 249#define ND_NA_FLAG_ROUTER 0x80000000 250#define ND_NA_FLAG_SOLICITED 0x40000000 251#define ND_NA_FLAG_OVERRIDE 0x20000000 252 253struct nd_redirect { /* redirect */ 254 struct icmp6_hdr nd_rd_hdr; 255 struct in6_addr nd_rd_target; /* target address */ 256 struct in6_addr nd_rd_dst; /* destination address */ 257 /* could be followed by options */ 258}; 259 260#define nd_rd_type nd_rd_hdr.icmp6_type 261#define nd_rd_code nd_rd_hdr.icmp6_code 262#define nd_rd_cksum nd_rd_hdr.icmp6_cksum 263#define nd_rd_reserved nd_rd_hdr.icmp6_data32[0] 264 265struct nd_opt_hdr { /* Neighbor discovery option header */ 266 u_int8_t nd_opt_type; 267 u_int8_t nd_opt_len; 268 /* followed by option specific data*/ 269}; 270 271#define ND_OPT_SOURCE_LINKADDR 1 272#define ND_OPT_TARGET_LINKADDR 2 273#define ND_OPT_PREFIX_INFORMATION 3 274#define ND_OPT_REDIRECTED_HEADER 4 275#define ND_OPT_MTU 5 276#define ND_OPT_ADVINTERVAL 7 277#define ND_OPT_HOMEAGENT_INFO 8 278#define ND_OPT_ROUTE_INFO 9 /* draft-ietf-ipngwg-router-preference, not officially assigned yet */ 279#define ND_OPT_RDNSS 25 280#define ND_OPT_DNSSL 31 281 282struct nd_opt_prefix_info { /* prefix information */ 283 u_int8_t nd_opt_pi_type; 284 u_int8_t nd_opt_pi_len; 285 u_int8_t nd_opt_pi_prefix_len; 286 u_int8_t nd_opt_pi_flags_reserved; 287 u_int8_t nd_opt_pi_valid_time[4]; 288 u_int8_t nd_opt_pi_preferred_time[4]; 289 u_int8_t nd_opt_pi_reserved2[4]; 290 struct in6_addr nd_opt_pi_prefix; 291}; 292 293#define ND_OPT_PI_FLAG_ONLINK 0x80 294#define ND_OPT_PI_FLAG_AUTO 0x40 295#define ND_OPT_PI_FLAG_ROUTER 0x20 /*2292bis*/ 296 297struct nd_opt_rd_hdr { /* redirected header */ 298 u_int8_t nd_opt_rh_type; 299 u_int8_t nd_opt_rh_len; 300 u_int16_t nd_opt_rh_reserved1; 301 u_int32_t nd_opt_rh_reserved2; 302 /* followed by IP header and data */ 303}; 304 305struct nd_opt_mtu { /* MTU option */ 306 u_int8_t nd_opt_mtu_type; 307 u_int8_t nd_opt_mtu_len; 308 u_int16_t nd_opt_mtu_reserved; 309 u_int32_t nd_opt_mtu_mtu; 310}; 311 312struct nd_opt_rdnss { /* RDNSS RFC 6106 5.1 */ 313 u_int8_t nd_opt_rdnss_type; 314 u_int8_t nd_opt_rdnss_len; 315 u_int16_t nd_opt_rdnss_reserved; 316 u_int32_t nd_opt_rdnss_lifetime; 317 struct in6_addr nd_opt_rdnss_addr[1]; /* variable-length */ 318}; 319 320struct nd_opt_dnssl { /* DNSSL RFC 6106 5.2 */ 321 u_int8_t nd_opt_dnssl_type; 322 u_int8_t nd_opt_dnssl_len; 323 u_int16_t nd_opt_dnssl_reserved; 324 u_int32_t nd_opt_dnssl_lifetime; 325 /* followed by list of DNS search domains, variable-length */ 326}; 327 328struct nd_opt_advinterval { /* Advertisement interval option */ 329 u_int8_t nd_opt_adv_type; 330 u_int8_t nd_opt_adv_len; 331 u_int16_t nd_opt_adv_reserved; 332 u_int32_t nd_opt_adv_interval; 333}; 334 335struct nd_opt_homeagent_info { /* Home Agent info */ 336 u_int8_t nd_opt_hai_type; 337 u_int8_t nd_opt_hai_len; 338 u_int16_t nd_opt_hai_reserved; 339 int16_t nd_opt_hai_preference; 340 u_int16_t nd_opt_hai_lifetime; 341}; 342 343struct nd_opt_route_info { /* route info */ 344 u_int8_t nd_opt_rti_type; 345 u_int8_t nd_opt_rti_len; 346 u_int8_t nd_opt_rti_prefixlen; 347 u_int8_t nd_opt_rti_flags; 348 u_int32_t nd_opt_rti_lifetime; 349 /* prefix follows */ 350}; 351 352/* 353 * icmp6 namelookup 354 */ 355 356struct icmp6_namelookup { 357 struct icmp6_hdr icmp6_nl_hdr; 358 u_int8_t icmp6_nl_nonce[8]; 359 int32_t icmp6_nl_ttl; 360#if 0 361 u_int8_t icmp6_nl_len; 362 u_int8_t icmp6_nl_name[3]; 363#endif 364 /* could be followed by options */ 365}; 366 367/* 368 * icmp6 node information 369 */ 370struct icmp6_nodeinfo { 371 struct icmp6_hdr icmp6_ni_hdr; 372 u_int8_t icmp6_ni_nonce[8]; 373 /* could be followed by reply data */ 374}; 375 376#define ni_type icmp6_ni_hdr.icmp6_type 377#define ni_code icmp6_ni_hdr.icmp6_code 378#define ni_cksum icmp6_ni_hdr.icmp6_cksum 379#define ni_qtype icmp6_ni_hdr.icmp6_data16[0] 380#define ni_flags icmp6_ni_hdr.icmp6_data16[1] 381 382#define NI_QTYPE_NOOP 0 /* NOOP */ 383#define NI_QTYPE_SUPTYPES 1 /* Supported Qtypes */ 384#define NI_QTYPE_FQDN 2 /* FQDN (draft 04) */ 385#define NI_QTYPE_DNSNAME 2 /* DNS Name */ 386#define NI_QTYPE_NODEADDR 3 /* Node Addresses */ 387#define NI_QTYPE_IPV4ADDR 4 /* IPv4 Addresses */ 388 389/* network endian */ 390#define NI_SUPTYPE_FLAG_COMPRESS ((u_int16_t)htons(0x1)) 391#define NI_FQDN_FLAG_VALIDTTL ((u_int16_t)htons(0x1)) 392 393/* network endian */ 394#define NI_NODEADDR_FLAG_TRUNCATE ((u_int16_t)htons(0x1)) 395#define NI_NODEADDR_FLAG_ALL ((u_int16_t)htons(0x2)) 396#define NI_NODEADDR_FLAG_COMPAT ((u_int16_t)htons(0x4)) 397#define NI_NODEADDR_FLAG_LINKLOCAL ((u_int16_t)htons(0x8)) 398#define NI_NODEADDR_FLAG_SITELOCAL ((u_int16_t)htons(0x10)) 399#define NI_NODEADDR_FLAG_GLOBAL ((u_int16_t)htons(0x20)) 400#define NI_NODEADDR_FLAG_ANYCAST ((u_int16_t)htons(0x40)) /* just experimental. not in spec */ 401 402struct ni_reply_fqdn { 403 u_int32_t ni_fqdn_ttl; /* TTL */ 404 u_int8_t ni_fqdn_namelen; /* length in octets of the FQDN */ 405 u_int8_t ni_fqdn_name[3]; /* XXX: alignment */ 406}; 407 408/* 409 * Router Renumbering. as router-renum-08.txt 410 */ 411struct icmp6_router_renum { /* router renumbering header */ 412 struct icmp6_hdr rr_hdr; 413 u_int8_t rr_segnum; 414 u_int8_t rr_flags; 415 u_int16_t rr_maxdelay; 416 u_int32_t rr_reserved; 417}; 418#define ICMP6_RR_FLAGS_TEST 0x80 419#define ICMP6_RR_FLAGS_REQRESULT 0x40 420#define ICMP6_RR_FLAGS_FORCEAPPLY 0x20 421#define ICMP6_RR_FLAGS_SPECSITE 0x10 422#define ICMP6_RR_FLAGS_PREVDONE 0x08 423 424#define rr_type rr_hdr.icmp6_type 425#define rr_code rr_hdr.icmp6_code 426#define rr_cksum rr_hdr.icmp6_cksum 427#define rr_seqnum rr_hdr.icmp6_data32[0] 428 429struct rr_pco_match { /* match prefix part */ 430 u_int8_t rpm_code; 431 u_int8_t rpm_len; 432 u_int8_t rpm_ordinal; 433 u_int8_t rpm_matchlen; 434 u_int8_t rpm_minlen; 435 u_int8_t rpm_maxlen; 436 u_int16_t rpm_reserved; 437 struct in6_addr rpm_prefix; 438}; 439 440#define RPM_PCO_ADD 1 441#define RPM_PCO_CHANGE 2 442#define RPM_PCO_SETGLOBAL 3 443#define RPM_PCO_MAX 4 444 445struct rr_pco_use { /* use prefix part */ 446 u_int8_t rpu_uselen; 447 u_int8_t rpu_keeplen; 448 u_int8_t rpu_ramask; 449 u_int8_t rpu_raflags; 450 u_int32_t rpu_vltime; 451 u_int32_t rpu_pltime; 452 u_int32_t rpu_flags; 453 struct in6_addr rpu_prefix; 454}; 455#define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK 0x80 456#define ICMP6_RR_PCOUSE_RAFLAGS_AUTO 0x40 457 458/* network endian */ 459#define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME ((u_int32_t)htonl(0x80000000)) 460#define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME ((u_int32_t)htonl(0x40000000)) 461 462struct rr_result { /* router renumbering result message */ 463 u_int16_t rrr_flags; 464 u_int8_t rrr_ordinal; 465 u_int8_t rrr_matchedlen; 466 u_int32_t rrr_ifid; 467 struct in6_addr rrr_prefix; 468}; 469/* network endian */ 470#define ICMP6_RR_RESULT_FLAGS_OOB ((u_int16_t)htons(0x0002)) 471#define ICMP6_RR_RESULT_FLAGS_FORBIDDEN ((u_int16_t)htons(0x0001)) 472 473#endif /* not _NETINET_ICMP6_H_ */ 474