bsd/netinet/icmp6.h

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