bsd/netinet/icmp6.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*      $KAME: icmp6.h,v 1.46 2001/04/27 15:09:48 itojun Exp $  */
  29
  30 /*
  31  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
  32  * All rights reserved.
  33  *
  34  * Redistribution and use in source and binary forms, with or without
  35  * modification, are permitted provided that the following conditions
  36  * are met:
  37  * 1. Redistributions of source code must retain the above copyright
  38  *    notice, this list of conditions and the following disclaimer.
  39  * 2. Redistributions in binary form must reproduce the above copyright
  40  *    notice, this list of conditions and the following disclaimer in the
  41  *    documentation and/or other materials provided with the distribution.
  42  * 3. Neither the name of the project nor the names of its contributors
  43  *    may be used to endorse or promote products derived from this software
  44  *    without specific prior written permission.
  45  *
  46  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  47  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  48  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  49  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  50  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  51  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  52  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  53  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  54  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  55  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  56  * SUCH DAMAGE.
  57  */
  58
  59 /*
  60  * Copyright (c) 1982, 1986, 1993
  61  *      The Regents of the University of California.  All rights reserved.
  62  *
  63  * Redistribution and use in source and binary forms, with or without
  64  * modification, are permitted provided that the following conditions
  65  * are met:
  66  * 1. Redistributions of source code must retain the above copyright
  67  *    notice, this list of conditions and the following disclaimer.
  68  * 2. Redistributions in binary form must reproduce the above copyright
  69  *    notice, this list of conditions and the following disclaimer in the
  70  *    documentation and/or other materials provided with the distribution.
  71  * 3. All advertising materials mentioning features or use of this software
  72  *    must display the following acknowledgement:
  73  *      This product includes software developed by the University of
  74  *      California, Berkeley and its contributors.
  75  * 4. Neither the name of the University nor the names of its contributors
  76  *    may be used to endorse or promote products derived from this software
  77  *    without specific prior written permission.
  78  *
  79  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  80  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  81  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  82  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  83  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  84  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  85  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  86  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  87  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  88  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  89  * SUCH DAMAGE.
  90  *
  91  *      @(#)ip_icmp.h   8.1 (Berkeley) 6/10/93
  92  */
  93
  94 #ifndef _NETINET_ICMP6_H_
  95 #define _NETINET_ICMP6_H_
  96 #include <sys/appleapiopts.h>
  97
  98 #define ICMPV6_PLD_MAXLEN       1232    /* IPV6_MMTU - sizeof(struct ip6_hdr)
  99                                            - sizeof(struct icmp6_hdr) */
 100
 101 struct icmp6_hdr {
 102         u_int8_t        icmp6_type;     /* type field */
 103         u_int8_t        icmp6_code;     /* code field */
 104         u_int16_t       icmp6_cksum;    /* checksum field */
 105         union {
 106                 u_int32_t       icmp6_un_data32[1]; /* type-specific field */
 107                 u_int16_t       icmp6_un_data16[2]; /* type-specific field */
 108                 u_int8_t        icmp6_un_data8[4];  /* type-specific field */
 109         } icmp6_dataun;
 110 };
 111
 112 #define icmp6_data32    icmp6_dataun.icmp6_un_data32
 113 #define icmp6_data16    icmp6_dataun.icmp6_un_data16
 114 #define icmp6_data8     icmp6_dataun.icmp6_un_data8
 115 #define icmp6_pptr      icmp6_data32[0]         /* parameter prob */
 116 #define icmp6_mtu       icmp6_data32[0]         /* packet too big */
 117 #define icmp6_id        icmp6_data16[0]         /* echo request/reply */
 118 #define icmp6_seq       icmp6_data16[1]         /* echo request/reply */
 119 #define icmp6_maxdelay  icmp6_data16[0]         /* mcast group membership */
 120
 121 #define ICMP6_DST_UNREACH               1       /* dest unreachable, codes: */
 122 #define ICMP6_PACKET_TOO_BIG            2       /* packet too big */
 123 #define ICMP6_TIME_EXCEEDED             3       /* time exceeded, code: */
 124 #define ICMP6_PARAM_PROB                4       /* ip6 header bad */
 125
 126 #define ICMP6_ECHO_REQUEST              128     /* echo service */
 127 #define ICMP6_ECHO_REPLY                129     /* echo reply */
 128 #define ICMP6_MEMBERSHIP_QUERY          130     /* group membership query */
 129 #define MLD6_LISTENER_QUERY             130     /* multicast listener query */
 130 #define ICMP6_MEMBERSHIP_REPORT         131     /* group membership report */
 131 #define MLD6_LISTENER_REPORT            131     /* multicast listener report */
 132 #define ICMP6_MEMBERSHIP_REDUCTION      132     /* group membership termination */
 133 #define MLD6_LISTENER_DONE              132     /* multicast listener done */
 134
 135 #define ND_ROUTER_SOLICIT               133     /* router solicitation */
 136 #define ND_ROUTER_ADVERT                134     /* router advertisment */
 137 #define ND_NEIGHBOR_SOLICIT             135     /* neighbor solicitation */
 138 #define ND_NEIGHBOR_ADVERT              136     /* neighbor advertisment */
 139 #define ND_REDIRECT                     137     /* redirect */
 140
 141 #define ICMP6_ROUTER_RENUMBERING        138     /* router renumbering */
 142
 143 #define ICMP6_WRUREQUEST                139     /* who are you request */
 144 #define ICMP6_WRUREPLY                  140     /* who are you reply */
 145 #define ICMP6_FQDN_QUERY                139     /* FQDN query */
 146 #define ICMP6_FQDN_REPLY                140     /* FQDN reply */
 147 #define ICMP6_NI_QUERY                  139     /* node information request */
 148 #define ICMP6_NI_REPLY                  140     /* node information reply */
 149
 150 /* The definitions below are experimental. TBA */
 151 #define MLD6_MTRACE_RESP                200     /* mtrace response(to sender) */
 152 #define MLD6_MTRACE                     201     /* mtrace messages */
 153
 154 #define ICMP6_HADISCOV_REQUEST          202     /* XXX To be defined */
 155 #define ICMP6_HADISCOV_REPLY            203     /* XXX To be defined */
 156
 157 #define ICMP6_MAXTYPE                   203
 158
 159 #define ICMP6_DST_UNREACH_NOROUTE       0       /* no route to destination */
 160 #define ICMP6_DST_UNREACH_ADMIN         1       /* administratively prohibited */
 161 #define ICMP6_DST_UNREACH_NOTNEIGHBOR   2       /* not a neighbor(obsolete) */
 162 #define ICMP6_DST_UNREACH_BEYONDSCOPE   2       /* beyond scope of source address */
 163 #define ICMP6_DST_UNREACH_ADDR          3       /* address unreachable */
 164 #define ICMP6_DST_UNREACH_NOPORT        4       /* port unreachable */
 165
 166 #define ICMP6_TIME_EXCEED_TRANSIT       0       /* ttl==0 in transit */
 167 #define ICMP6_TIME_EXCEED_REASSEMBLY    1       /* ttl==0 in reass */
 168
 169 #define ICMP6_PARAMPROB_HEADER          0       /* erroneous header field */
 170 #define ICMP6_PARAMPROB_NEXTHEADER      1       /* unrecognized next header */
 171 #define ICMP6_PARAMPROB_OPTION          2       /* unrecognized option */
 172
 173 #define ICMP6_INFOMSG_MASK              0x80    /* all informational messages */
 174
 175 #define ICMP6_NI_SUBJ_IPV6      0       /* Query Subject is an IPv6 address */
 176 #define ICMP6_NI_SUBJ_FQDN      1       /* Query Subject is a Domain name */
 177 #define ICMP6_NI_SUBJ_IPV4      2       /* Query Subject is an IPv4 address */
 178
 179 #define ICMP6_NI_SUCCESS        0       /* node information successful reply */
 180 #define ICMP6_NI_REFUSED        1       /* node information request is refused */
 181 #define ICMP6_NI_UNKNOWN        2       /* unknown Qtype */
 182
 183 #define ICMP6_ROUTER_RENUMBERING_COMMAND  0     /* rr command */
 184 #define ICMP6_ROUTER_RENUMBERING_RESULT   1     /* rr result */
 185 #define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET   255     /* rr seq num reset */
 186
 187 /* Used in kernel only */
 188 #define ND_REDIRECT_ONLINK      0       /* redirect to an on-link node */
 189 #define ND_REDIRECT_ROUTER      1       /* redirect to a better router */
 190
 191 /*
 192  * Multicast Listener Discovery
 193  */
 194 struct mld6_hdr {
 195         struct icmp6_hdr        mld6_hdr;
 196         struct in6_addr         mld6_addr; /* multicast address */
 197 };
 198
 199 #define mld6_type       mld6_hdr.icmp6_type
 200 #define mld6_code       mld6_hdr.icmp6_code
 201 #define mld6_cksum      mld6_hdr.icmp6_cksum
 202 #define mld6_maxdelay   mld6_hdr.icmp6_data16[0]
 203 #define mld6_reserved   mld6_hdr.icmp6_data16[1]
 204
 205 /*
 206  * Neighbor Discovery
 207  */
 208
 209 struct nd_router_solicit {      /* router solicitation */
 210         struct icmp6_hdr        nd_rs_hdr;
 211         /* could be followed by options */
 212 };
 213
 214 #define nd_rs_type      nd_rs_hdr.icmp6_type
 215 #define nd_rs_code      nd_rs_hdr.icmp6_code
 216 #define nd_rs_cksum     nd_rs_hdr.icmp6_cksum
 217 #define nd_rs_reserved  nd_rs_hdr.icmp6_data32[0]
 218
 219 struct nd_router_advert {       /* router advertisement */
 220         struct icmp6_hdr        nd_ra_hdr;
 221         u_int32_t               nd_ra_reachable;        /* reachable time */
 222         u_int32_t               nd_ra_retransmit;       /* retransmit timer */
 223         /* could be followed by options */
 224 };
 225
 226 #define nd_ra_type              nd_ra_hdr.icmp6_type
 227 #define nd_ra_code              nd_ra_hdr.icmp6_code
 228 #define nd_ra_cksum             nd_ra_hdr.icmp6_cksum
 229 #define nd_ra_curhoplimit       nd_ra_hdr.icmp6_data8[0]
 230 #define nd_ra_flags_reserved    nd_ra_hdr.icmp6_data8[1]
 231 #define ND_RA_FLAG_MANAGED      0x80
 232 #define ND_RA_FLAG_OTHER        0x40
 233 #define ND_RA_FLAG_HA           0x20
 234
 235 /*
 236  * Router preference values based on draft-draves-ipngwg-router-selection-01.
 237  * These are non-standard definitions.
 238  */
 239 #define ND_RA_FLAG_RTPREF_MASK  0x18 /* 00011000 */
 240
 241 #define ND_RA_FLAG_RTPREF_HIGH  0x08 /* 00001000 */
 242 #define ND_RA_FLAG_RTPREF_MEDIUM        0x00 /* 00000000 */
 243 #define ND_RA_FLAG_RTPREF_LOW   0x18 /* 00011000 */
 244 #define ND_RA_FLAG_RTPREF_RSV   0x10 /* 00010000 */
 245
 246 #define nd_ra_router_lifetime   nd_ra_hdr.icmp6_data16[1]
 247
 248 struct nd_neighbor_solicit {    /* neighbor solicitation */
 249         struct icmp6_hdr        nd_ns_hdr;
 250         struct in6_addr         nd_ns_target;   /*target address */
 251         /* could be followed by options */
 252 };
 253
 254 #define nd_ns_type              nd_ns_hdr.icmp6_type
 255 #define nd_ns_code              nd_ns_hdr.icmp6_code
 256 #define nd_ns_cksum             nd_ns_hdr.icmp6_cksum
 257 #define nd_ns_reserved          nd_ns_hdr.icmp6_data32[0]
 258
 259 struct nd_neighbor_advert {     /* neighbor advertisement */
 260         struct icmp6_hdr        nd_na_hdr;
 261         struct in6_addr         nd_na_target;   /* target address */
 262         /* could be followed by options */
 263 };
 264
 265 #define nd_na_type              nd_na_hdr.icmp6_type
 266 #define nd_na_code              nd_na_hdr.icmp6_code
 267 #define nd_na_cksum             nd_na_hdr.icmp6_cksum
 268 #define nd_na_flags_reserved    nd_na_hdr.icmp6_data32[0]
 269 #if BYTE_ORDER == BIG_ENDIAN
 270 #define ND_NA_FLAG_ROUTER               0x80000000
 271 #define ND_NA_FLAG_SOLICITED            0x40000000
 272 #define ND_NA_FLAG_OVERRIDE             0x20000000
 273 #else
 274 #if BYTE_ORDER == LITTLE_ENDIAN
 275 #define ND_NA_FLAG_ROUTER               0x80
 276 #define ND_NA_FLAG_SOLICITED            0x40
 277 #define ND_NA_FLAG_OVERRIDE             0x20
 278 #endif
 279 #endif
 280
 281 struct nd_redirect {            /* redirect */
 282         struct icmp6_hdr        nd_rd_hdr;
 283         struct in6_addr         nd_rd_target;   /* target address */
 284         struct in6_addr         nd_rd_dst;      /* destination address */
 285         /* could be followed by options */
 286 };
 287
 288 #define nd_rd_type              nd_rd_hdr.icmp6_type
 289 #define nd_rd_code              nd_rd_hdr.icmp6_code
 290 #define nd_rd_cksum             nd_rd_hdr.icmp6_cksum
 291 #define nd_rd_reserved          nd_rd_hdr.icmp6_data32[0]
 292
 293 struct nd_opt_hdr {             /* Neighbor discovery option header */
 294         u_int8_t        nd_opt_type;
 295         u_int8_t        nd_opt_len;
 296         /* followed by option specific data*/
 297 };
 298
 299 #define ND_OPT_SOURCE_LINKADDR          1
 300 #define ND_OPT_TARGET_LINKADDR          2
 301 #define ND_OPT_PREFIX_INFORMATION       3
 302 #define ND_OPT_REDIRECTED_HEADER        4
 303 #define ND_OPT_MTU                      5
 304
 305 #define ND_OPT_ROUTE_INFO               200     /* draft-ietf-ipngwg-router-preference, not officially assigned yet */
 306
 307 struct nd_opt_prefix_info {     /* prefix information */
 308         u_int8_t        nd_opt_pi_type;
 309         u_int8_t        nd_opt_pi_len;
 310         u_int8_t        nd_opt_pi_prefix_len;
 311         u_int8_t        nd_opt_pi_flags_reserved;
 312         u_int32_t       nd_opt_pi_valid_time;
 313         u_int32_t       nd_opt_pi_preferred_time;
 314         u_int32_t       nd_opt_pi_reserved2;
 315         struct in6_addr nd_opt_pi_prefix;
 316 };
 317
 318 #define ND_OPT_PI_FLAG_ONLINK           0x80
 319 #define ND_OPT_PI_FLAG_AUTO             0x40
 320
 321 struct nd_opt_rd_hdr {          /* redirected header */
 322         u_int8_t        nd_opt_rh_type;
 323         u_int8_t        nd_opt_rh_len;
 324         u_int16_t       nd_opt_rh_reserved1;
 325         u_int32_t       nd_opt_rh_reserved2;
 326         /* followed by IP header and data */
 327 };
 328
 329 struct nd_opt_mtu {             /* MTU option */
 330         u_int8_t        nd_opt_mtu_type;
 331         u_int8_t        nd_opt_mtu_len;
 332         u_int16_t       nd_opt_mtu_reserved;
 333         u_int32_t       nd_opt_mtu_mtu;
 334 };
 335
 336 struct nd_opt_route_info {      /* route info */
 337         u_int8_t        nd_opt_rti_type;
 338         u_int8_t        nd_opt_rti_len;
 339         u_int8_t        nd_opt_rti_prefixlen;
 340         u_int8_t        nd_opt_rti_flags;
 341         u_int32_t       nd_opt_rti_lifetime;
 342         /* followed by prefix */
 343 };
 344
 345 /*
 346  * icmp6 namelookup
 347  */
 348
 349 struct icmp6_namelookup {
 350         struct icmp6_hdr        icmp6_nl_hdr;
 351         u_int8_t        icmp6_nl_nonce[8];
 352         int32_t         icmp6_nl_ttl;
 353 #if 0
 354         u_int8_t        icmp6_nl_len;
 355         u_int8_t        icmp6_nl_name[3];
 356 #endif
 357         /* could be followed by options */
 358 };
 359
 360 /*
 361  * icmp6 node information
 362  */
 363 struct icmp6_nodeinfo {
 364         struct icmp6_hdr icmp6_ni_hdr;
 365         u_int8_t icmp6_ni_nonce[8];
 366         /* could be followed by reply data */
 367 };
 368
 369 #define ni_type         icmp6_ni_hdr.icmp6_type
 370 #define ni_code         icmp6_ni_hdr.icmp6_code
 371 #define ni_cksum        icmp6_ni_hdr.icmp6_cksum
 372 #define ni_qtype        icmp6_ni_hdr.icmp6_data16[0]
 373 #define ni_flags        icmp6_ni_hdr.icmp6_data16[1]
 374
 375 #define NI_QTYPE_NOOP           0 /* NOOP  */
 376 #define NI_QTYPE_SUPTYPES       1 /* Supported Qtypes */
 377 #define NI_QTYPE_FQDN           2 /* FQDN (draft 04) */
 378 #define NI_QTYPE_DNSNAME        2 /* DNS Name */
 379 #define NI_QTYPE_NODEADDR       3 /* Node Addresses */
 380 #define NI_QTYPE_IPV4ADDR       4 /* IPv4 Addresses */
 381
 382 #if BYTE_ORDER == BIG_ENDIAN
 383 #define NI_SUPTYPE_FLAG_COMPRESS        0x1
 384 #define NI_FQDN_FLAG_VALIDTTL           0x1
 385 #elif BYTE_ORDER == LITTLE_ENDIAN
 386 #define NI_SUPTYPE_FLAG_COMPRESS        0x0100
 387 #define NI_FQDN_FLAG_VALIDTTL           0x0100
 388 #endif
 389
 390 #ifdef NAME_LOOKUPS_04
 391 #if BYTE_ORDER == BIG_ENDIAN
 392 #define NI_NODEADDR_FLAG_LINKLOCAL      0x1
 393 #define NI_NODEADDR_FLAG_SITELOCAL      0x2
 394 #define NI_NODEADDR_FLAG_GLOBAL         0x4
 395 #define NI_NODEADDR_FLAG_ALL            0x8
 396 #define NI_NODEADDR_FLAG_TRUNCATE       0x10
 397 #define NI_NODEADDR_FLAG_ANYCAST        0x20 /* just experimental. not in spec */
 398 #elif BYTE_ORDER == LITTLE_ENDIAN
 399 #define NI_NODEADDR_FLAG_LINKLOCAL      0x0100
 400 #define NI_NODEADDR_FLAG_SITELOCAL      0x0200
 401 #define NI_NODEADDR_FLAG_GLOBAL         0x0400
 402 #define NI_NODEADDR_FLAG_ALL            0x0800
 403 #define NI_NODEADDR_FLAG_TRUNCATE       0x1000
 404 #define NI_NODEADDR_FLAG_ANYCAST        0x2000 /* just experimental. not in spec */
 405 #endif
 406 #else  /* draft-ietf-ipngwg-icmp-name-lookups-05 (and later?) */
 407 #if BYTE_ORDER == BIG_ENDIAN
 408 #define NI_NODEADDR_FLAG_TRUNCATE       0x1
 409 #define NI_NODEADDR_FLAG_ALL            0x2
 410 #define NI_NODEADDR_FLAG_COMPAT         0x4
 411 #define NI_NODEADDR_FLAG_LINKLOCAL      0x8
 412 #define NI_NODEADDR_FLAG_SITELOCAL      0x10
 413 #define NI_NODEADDR_FLAG_GLOBAL         0x20
 414 #define NI_NODEADDR_FLAG_ANYCAST        0x40 /* just experimental. not in spec */
 415 #elif BYTE_ORDER == LITTLE_ENDIAN
 416 #define NI_NODEADDR_FLAG_TRUNCATE       0x0100
 417 #define NI_NODEADDR_FLAG_ALL            0x0200
 418 #define NI_NODEADDR_FLAG_COMPAT         0x0400
 419 #define NI_NODEADDR_FLAG_LINKLOCAL      0x0800
 420 #define NI_NODEADDR_FLAG_SITELOCAL      0x1000
 421 #define NI_NODEADDR_FLAG_GLOBAL         0x2000
 422 #define NI_NODEADDR_FLAG_ANYCAST        0x4000 /* just experimental. not in spec */
 423 #endif
 424 #endif
 425
 426 struct ni_reply_fqdn {
 427         u_int32_t ni_fqdn_ttl;  /* TTL */
 428         u_int8_t ni_fqdn_namelen; /* length in octets of the FQDN */
 429         u_int8_t ni_fqdn_name[3]; /* XXX: alignment */
 430 };
 431
 432 /*
 433  * Router Renumbering. as router-renum-08.txt
 434  */
 435 struct icmp6_router_renum {     /* router renumbering header */
 436         struct icmp6_hdr        rr_hdr;
 437         u_int8_t        rr_segnum;
 438         u_int8_t        rr_flags;
 439         u_int16_t       rr_maxdelay;
 440         u_int32_t       rr_reserved;
 441 };
 442
 443 #define ICMP6_RR_FLAGS_TEST             0x80
 444 #define ICMP6_RR_FLAGS_REQRESULT        0x40
 445 #define ICMP6_RR_FLAGS_FORCEAPPLY       0x20
 446 #define ICMP6_RR_FLAGS_SPECSITE         0x10
 447 #define ICMP6_RR_FLAGS_PREVDONE         0x08
 448
 449 #define rr_type         rr_hdr.icmp6_type
 450 #define rr_code         rr_hdr.icmp6_code
 451 #define rr_cksum        rr_hdr.icmp6_cksum
 452 #define rr_seqnum       rr_hdr.icmp6_data32[0]
 453
 454 struct rr_pco_match {           /* match prefix part */
 455         u_int8_t        rpm_code;
 456         u_int8_t        rpm_len;
 457         u_int8_t        rpm_ordinal;
 458         u_int8_t        rpm_matchlen;
 459         u_int8_t        rpm_minlen;
 460         u_int8_t        rpm_maxlen;
 461         u_int16_t       rpm_reserved;
 462         struct  in6_addr        rpm_prefix;
 463 };
 464
 465 #define RPM_PCO_ADD             1
 466 #define RPM_PCO_CHANGE          2
 467 #define RPM_PCO_SETGLOBAL       3
 468 #define RPM_PCO_MAX             4
 469
 470 struct rr_pco_use {             /* use prefix part */
 471         u_int8_t        rpu_uselen;
 472         u_int8_t        rpu_keeplen;
 473         u_int8_t        rpu_ramask;
 474         u_int8_t        rpu_raflags;
 475         u_int32_t       rpu_vltime;
 476         u_int32_t       rpu_pltime;
 477         u_int32_t       rpu_flags;
 478         struct  in6_addr rpu_prefix;
 479 };
 480 #define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK  0x80
 481 #define ICMP6_RR_PCOUSE_RAFLAGS_AUTO    0x40
 482
 483 #if BYTE_ORDER == BIG_ENDIAN
 484 #define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME     0x80000000
 485 #define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME     0x40000000
 486 #elif BYTE_ORDER == LITTLE_ENDIAN
 487 #define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME     0x80
 488 #define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME     0x40
 489 #endif
 490
 491 struct rr_result {              /* router renumbering result message */
 492         u_int16_t       rrr_flags;
 493         u_int8_t        rrr_ordinal;
 494         u_int8_t        rrr_matchedlen;
 495         u_int32_t       rrr_ifid;
 496         struct  in6_addr rrr_prefix;
 497 };
 498 #if BYTE_ORDER == BIG_ENDIAN
 499 #define ICMP6_RR_RESULT_FLAGS_OOB               0x0002
 500 #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN         0x0001
 501 #elif BYTE_ORDER == LITTLE_ENDIAN
 502 #define ICMP6_RR_RESULT_FLAGS_OOB               0x0200
 503 #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN         0x0100
 504 #endif
 505
 506 /*
 507  * icmp6 filter structures.
 508  */
 509
 510 struct icmp6_filter {
 511         u_int32_t icmp6_filt[8];
 512 };
 513
 514 #ifdef KERNEL
 515 #define ICMP6_FILTER_SETPASSALL(filterp) \
 516 do {                                                            \
 517         int i; u_char *p;                                       \
 518         p = (u_char *)filterp;                                  \
 519         for (i = 0; i < sizeof(struct icmp6_filter); i++)       \
 520                 p[i] = 0xff;                                    \
 521 } while (0)
 522 #define ICMP6_FILTER_SETBLOCKALL(filterp) \
 523         bzero(filterp, sizeof(struct icmp6_filter))
 524 #else /* KERNEL */
 525 #define ICMP6_FILTER_SETPASSALL(filterp) \
 526         memset(filterp, 0xff, sizeof(struct icmp6_filter))
 527 #define ICMP6_FILTER_SETBLOCKALL(filterp) \
 528         memset(filterp, 0x00, sizeof(struct icmp6_filter))
 529 #endif /* KERNEL */
 530
 531 #define ICMP6_FILTER_SETPASS(type, filterp) \
 532         (((filterp)->icmp6_filt[(type) >> 5]) |= (1 << ((type) & 31)))
 533 #define ICMP6_FILTER_SETBLOCK(type, filterp) \
 534         (((filterp)->icmp6_filt[(type) >> 5]) &= ~(1 << ((type) & 31)))
 535 #define ICMP6_FILTER_WILLPASS(type, filterp) \
 536         ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) != 0)
 537 #define ICMP6_FILTER_WILLBLOCK(type, filterp) \
 538         ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) == 0)
 539
 540 /*
 541  * Variables related to this implementation
 542  * of the internet control message protocol version 6.
 543  */
 544 struct icmp6errstat {
 545         u_quad_t icp6errs_dst_unreach_noroute;
 546         u_quad_t icp6errs_dst_unreach_admin;
 547         u_quad_t icp6errs_dst_unreach_beyondscope;
 548         u_quad_t icp6errs_dst_unreach_addr;
 549         u_quad_t icp6errs_dst_unreach_noport;
 550         u_quad_t icp6errs_packet_too_big;
 551         u_quad_t icp6errs_time_exceed_transit;
 552         u_quad_t icp6errs_time_exceed_reassembly;
 553         u_quad_t icp6errs_paramprob_header;
 554         u_quad_t icp6errs_paramprob_nextheader;
 555         u_quad_t icp6errs_paramprob_option;
 556         u_quad_t icp6errs_redirect; /* we regard redirect as an error here */
 557         u_quad_t icp6errs_unknown;
 558 };
 559
 560 struct icmp6stat {
 561 /* statistics related to icmp6 packets generated */
 562         u_quad_t icp6s_error;           /* # of calls to icmp6_error */
 563         u_quad_t icp6s_canterror;       /* no error 'cuz old was icmp */
 564         u_quad_t icp6s_toofreq;         /* no error 'cuz rate limitation */
 565         u_quad_t icp6s_outhist[256];
 566 /* statistics related to input message processed */
 567         u_quad_t icp6s_badcode;         /* icmp6_code out of range */
 568         u_quad_t icp6s_tooshort;        /* packet < sizeof(struct icmp6_hdr) */
 569         u_quad_t icp6s_checksum;        /* bad checksum */
 570         u_quad_t icp6s_badlen;          /* calculated bound mismatch */
 571         u_quad_t icp6s_reflect;         /* number of responses */
 572         u_quad_t icp6s_inhist[256];
 573         u_quad_t icp6s_nd_toomanyopt;   /* too many ND options */
 574         struct icmp6errstat icp6s_outerrhist;
 575 #define icp6s_odst_unreach_noroute \
 576         icp6s_outerrhist.icp6errs_dst_unreach_noroute
 577 #define icp6s_odst_unreach_admin icp6s_outerrhist.icp6errs_dst_unreach_admin
 578 #define icp6s_odst_unreach_beyondscope \
 579         icp6s_outerrhist.icp6errs_dst_unreach_beyondscope
 580 #define icp6s_odst_unreach_addr icp6s_outerrhist.icp6errs_dst_unreach_addr
 581 #define icp6s_odst_unreach_noport icp6s_outerrhist.icp6errs_dst_unreach_noport
 582 #define icp6s_opacket_too_big icp6s_outerrhist.icp6errs_packet_too_big
 583 #define icp6s_otime_exceed_transit \
 584         icp6s_outerrhist.icp6errs_time_exceed_transit
 585 #define icp6s_otime_exceed_reassembly \
 586         icp6s_outerrhist.icp6errs_time_exceed_reassembly
 587 #define icp6s_oparamprob_header icp6s_outerrhist.icp6errs_paramprob_header
 588 #define icp6s_oparamprob_nextheader \
 589         icp6s_outerrhist.icp6errs_paramprob_nextheader
 590 #define icp6s_oparamprob_option icp6s_outerrhist.icp6errs_paramprob_option
 591 #define icp6s_oredirect icp6s_outerrhist.icp6errs_redirect
 592 #define icp6s_ounknown icp6s_outerrhist.icp6errs_unknown
 593         u_quad_t icp6s_pmtuchg;         /* path MTU changes */
 594         u_quad_t icp6s_nd_badopt;       /* bad ND options */
 595         u_quad_t icp6s_badns;           /* bad neighbor solicitation */
 596         u_quad_t icp6s_badna;           /* bad neighbor advertisement */
 597         u_quad_t icp6s_badrs;           /* bad router advertisement */
 598         u_quad_t icp6s_badra;           /* bad router advertisement */
 599         u_quad_t icp6s_badredirect;     /* bad redirect message */
 600 };
 601
 602 /*
 603  * Names for ICMP sysctl objects
 604  */
 605 #define ICMPV6CTL_STATS         1
 606 #define ICMPV6CTL_REDIRACCEPT   2       /* accept/process redirects */
 607 #define ICMPV6CTL_REDIRTIMEOUT  3       /* redirect cache time */
 608 #define ICMPV6CTL_ND6_PRUNE     6
 609 #define ICMPV6CTL_ND6_DELAY     8
 610 #define ICMPV6CTL_ND6_UMAXTRIES 9
 611 #define ICMPV6CTL_ND6_MMAXTRIES         10
 612 #define ICMPV6CTL_ND6_USELOOPBACK       11
 613 /*#define ICMPV6CTL_ND6_PROXYALL        12      obsoleted, do not reuse here */
 614 #define ICMPV6CTL_NODEINFO      13
 615 #define ICMPV6CTL_ERRPPSLIMIT   14      /* ICMPv6 error pps limitation */
 616 #define ICMPV6CTL_ND6_MAXNUDHINT        15
 617 #define ICMPV6CTL_MTUDISC_HIWAT 16
 618 #define ICMPV6CTL_MTUDISC_LOWAT 17
 619 #define ICMPV6CTL_ND6_DEBUG     18
 620 #define ICMPV6CTL_ND6_DRLIST    19
 621 #define ICMPV6CTL_ND6_PRLIST    20
 622 #define ICMPV6CTL_MAXID         21
 623
 624 #ifdef KERNEL_PRIVATE
 625 #define ICMPV6CTL_NAMES { \
 626         { 0, 0 }, \
 627         { 0, 0 }, \
 628         { "rediraccept", CTLTYPE_INT }, \
 629         { "redirtimeout", CTLTYPE_INT }, \
 630         { 0, 0 }, \
 631         { 0, 0 }, \
 632         { "nd6_prune", CTLTYPE_INT }, \
 633         { 0, 0 }, \
 634         { "nd6_delay", CTLTYPE_INT }, \
 635         { "nd6_umaxtries", CTLTYPE_INT }, \
 636         { "nd6_mmaxtries", CTLTYPE_INT }, \
 637         { "nd6_useloopback", CTLTYPE_INT }, \
 638         { 0, 0 }, \
 639         { "nodeinfo", CTLTYPE_INT }, \
 640         { "errppslimit", CTLTYPE_INT }, \
 641         { "nd6_maxnudhint", CTLTYPE_INT }, \
 642         { "mtudisc_hiwat", CTLTYPE_INT }, \
 643         { "mtudisc_lowat", CTLTYPE_INT }, \
 644         { "nd6_debug", CTLTYPE_INT }, \
 645         { 0, 0 }, \
 646         { 0, 0 }, \
 647 }
 648
 649 #define RTF_PROBEMTU    RTF_PROTO1
 650
 651 # ifdef __STDC__
 652 struct  rtentry;
 653 struct  rttimer;
 654 struct  in6_multi;
 655 # endif
 656 void    icmp6_init(void);
 657 void    icmp6_paramerror(struct mbuf *, int);
 658 void    icmp6_error(struct mbuf *, int, int, int);
 659 int     icmp6_input(struct mbuf **, int *);
 660 void    icmp6_fasttimo(void);
 661 void    icmp6_reflect(struct mbuf *, size_t);
 662 void    icmp6_prepare(struct mbuf *);
 663 void    icmp6_redirect_input(struct mbuf *, int);
 664 void    icmp6_redirect_output(struct mbuf *, struct rtentry *);
 665
 666 struct  ip6ctlparam;
 667 void    icmp6_mtudisc_update(struct ip6ctlparam *, int);
 668
 669 /* XXX: is this the right place for these macros? */
 670 #define icmp6_ifstat_inc(ifp, tag) \
 671 do {                                                            \
 672         if ((ifp) && (ifp)->if_index <= if_index                        \
 673          && (ifp)->if_index < icmp6_ifstatmax                   \
 674          && icmp6_ifstat && icmp6_ifstat[(ifp)->if_index]) {    \
 675                 icmp6_ifstat[(ifp)->if_index]->tag++;           \
 676         }                                                       \
 677 } while (0)
 678
 679 #define icmp6_ifoutstat_inc(ifp, type, code) \
 680 do { \
 681                 icmp6_ifstat_inc(ifp, ifs6_out_msg); \
 682                 if (type < ICMP6_INFOMSG_MASK) \
 683                         icmp6_ifstat_inc(ifp, ifs6_out_error); \
 684                 switch(type) { \
 685                  case ICMP6_DST_UNREACH: \
 686                          icmp6_ifstat_inc(ifp, ifs6_out_dstunreach); \
 687                          if (code == ICMP6_DST_UNREACH_ADMIN) \
 688                                  icmp6_ifstat_inc(ifp, ifs6_out_adminprohib); \
 689                          break; \
 690                  case ICMP6_PACKET_TOO_BIG: \
 691                          icmp6_ifstat_inc(ifp, ifs6_out_pkttoobig); \
 692                          break; \
 693                  case ICMP6_TIME_EXCEEDED: \
 694                          icmp6_ifstat_inc(ifp, ifs6_out_timeexceed); \
 695                          break; \
 696                  case ICMP6_PARAM_PROB: \
 697                          icmp6_ifstat_inc(ifp, ifs6_out_paramprob); \
 698                          break; \
 699                  case ICMP6_ECHO_REQUEST: \
 700                          icmp6_ifstat_inc(ifp, ifs6_out_echo); \
 701                          break; \
 702                  case ICMP6_ECHO_REPLY: \
 703                          icmp6_ifstat_inc(ifp, ifs6_out_echoreply); \
 704                          break; \
 705                  case MLD6_LISTENER_QUERY: \
 706                          icmp6_ifstat_inc(ifp, ifs6_out_mldquery); \
 707                          break; \
 708                  case MLD6_LISTENER_REPORT: \
 709                          icmp6_ifstat_inc(ifp, ifs6_out_mldreport); \
 710                          break; \
 711                  case MLD6_LISTENER_DONE: \
 712                          icmp6_ifstat_inc(ifp, ifs6_out_mlddone); \
 713                          break; \
 714                  case ND_ROUTER_SOLICIT: \
 715                          icmp6_ifstat_inc(ifp, ifs6_out_routersolicit); \
 716                          break; \
 717                  case ND_ROUTER_ADVERT: \
 718                          icmp6_ifstat_inc(ifp, ifs6_out_routeradvert); \
 719                          break; \
 720                  case ND_NEIGHBOR_SOLICIT: \
 721                          icmp6_ifstat_inc(ifp, ifs6_out_neighborsolicit); \
 722                          break; \
 723                  case ND_NEIGHBOR_ADVERT: \
 724                          icmp6_ifstat_inc(ifp, ifs6_out_neighboradvert); \
 725                          break; \
 726                  case ND_REDIRECT: \
 727                          icmp6_ifstat_inc(ifp, ifs6_out_redirect); \
 728                          break; \
 729                 } \
 730 } while (0)
 731
 732 extern int      icmp6_rediraccept;      /* accept/process redirects */
 733 extern int      icmp6_redirtimeout;     /* cache time for redirect routes */
 734 #endif KERNEL_PRIVATE
 735
 736 #endif /* !_NETINET_ICMP6_H_ */