bsd/netinet/icmp6.h

   1 /*
   2  * Copyright (c) 2000-2015 Apple 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 } __attribute__((__packed__));
 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 MLD_LISTENER_QUERY              130     /* multicast listener query */
 129 #define MLD_LISTENER_REPORT             131     /* multicast listener report */
 130 #define MLD_LISTENER_DONE               132     /* multicast listener done */
 131 #define MLD_LISTENER_REDUCTION MLD_LISTENER_DONE /* RFC3542 definition */
 132
 133 /* RFC2292 decls */
 134 #define ICMP6_MEMBERSHIP_QUERY          130     /* group membership query */
 135 #define ICMP6_MEMBERSHIP_REPORT         131     /* group membership report */
 136 #define ICMP6_MEMBERSHIP_REDUCTION      132     /* group membership termination */
 137
 138 #ifndef KERNEL
 139 /* the followings are for backward compatibility to old KAME apps. */
 140 #define MLD6_LISTENER_QUERY     MLD_LISTENER_QUERY
 141 #define MLD6_LISTENER_REPORT    MLD_LISTENER_REPORT
 142 #define MLD6_LISTENER_DONE      MLD_LISTENER_DONE
 143 #endif
 144
 145 #define ND_ROUTER_SOLICIT               133     /* router solicitation */
 146 #define ND_ROUTER_ADVERT                134     /* router advertisement */
 147 #define ND_NEIGHBOR_SOLICIT             135     /* neighbor solicitation */
 148 #define ND_NEIGHBOR_ADVERT              136     /* neighbor advertisement */
 149 #define ND_REDIRECT                     137     /* redirect */
 150
 151 #define ICMP6_ROUTER_RENUMBERING        138     /* router renumbering */
 152
 153 #define ICMP6_WRUREQUEST                139     /* who are you request */
 154 #define ICMP6_WRUREPLY                  140     /* who are you reply */
 155 #define ICMP6_FQDN_QUERY                139     /* FQDN query */
 156 #define ICMP6_FQDN_REPLY                140     /* FQDN reply */
 157 #define ICMP6_NI_QUERY                  139     /* node information request */
 158 #define ICMP6_NI_REPLY                  140     /* node information reply */
 159 #define MLDV2_LISTENER_REPORT   143     /* RFC3810 listener report */
 160
 161 /* The definitions below are experimental. TBA */
 162 #define MLD_MTRACE_RESP                 200     /* mtrace resp (to sender) */
 163 #define MLD_MTRACE                      201     /* mtrace messages */
 164
 165 #ifndef KERNEL
 166 #define MLD6_MTRACE_RESP        MLD_MTRACE_RESP
 167 #define MLD6_MTRACE             MLD_MTRACE
 168 #endif
 169
 170 #define ICMP6_MAXTYPE                   201
 171
 172 #define ICMP6_DST_UNREACH_NOROUTE       0       /* no route to destination */
 173 #define ICMP6_DST_UNREACH_ADMIN         1       /* administratively prohibited */
 174 #define ICMP6_DST_UNREACH_NOTNEIGHBOR   2       /* not a neighbor(obsolete) */
 175 #define ICMP6_DST_UNREACH_BEYONDSCOPE   2       /* beyond scope of source address */
 176 #define ICMP6_DST_UNREACH_ADDR          3       /* address unreachable */
 177 #define ICMP6_DST_UNREACH_NOPORT        4       /* port unreachable */
 178
 179 #define ICMP6_TIME_EXCEED_TRANSIT       0       /* ttl==0 in transit */
 180 #define ICMP6_TIME_EXCEED_REASSEMBLY    1       /* ttl==0 in reass */
 181
 182 #define ICMP6_PARAMPROB_HEADER          0       /* erroneous header field */
 183 #define ICMP6_PARAMPROB_NEXTHEADER      1       /* unrecognized next header */
 184 #define ICMP6_PARAMPROB_OPTION          2       /* unrecognized option */
 185
 186 #define ICMP6_INFOMSG_MASK              0x80    /* all informational messages */
 187
 188 #define ICMP6_NI_SUBJ_IPV6      0       /* Query Subject is an IPv6 address */
 189 #define ICMP6_NI_SUBJ_FQDN      1       /* Query Subject is a Domain name */
 190 #define ICMP6_NI_SUBJ_IPV4      2       /* Query Subject is an IPv4 address */
 191
 192 #define ICMP6_NI_SUCCESS        0       /* node information successful reply */
 193 #define ICMP6_NI_REFUSED        1       /* node information request is refused */
 194 #define ICMP6_NI_UNKNOWN        2       /* unknown Qtype */
 195
 196 #define ICMP6_ROUTER_RENUMBERING_COMMAND  0     /* rr command */
 197 #define ICMP6_ROUTER_RENUMBERING_RESULT   1     /* rr result */
 198 #define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET   255     /* rr seq num reset */
 199
 200 /* Used in kernel only */
 201 #define ND_REDIRECT_ONLINK      0       /* redirect to an on-link node */
 202 #define ND_REDIRECT_ROUTER      1       /* redirect to a better router */
 203
 204 /*
 205  * Multicast Listener Discovery
 206  */
 207 struct mld_hdr {
 208         struct icmp6_hdr        mld_icmp6_hdr;
 209         struct in6_addr         mld_addr; /* multicast address */
 210 } __attribute__((__packed__));
 211
 212 /* definitions to provide backward compatibility to old KAME applications */
 213 #ifndef KERNEL
 214 #define mld6_hdr        mld_hdr
 215 #define mld6_type       mld_type
 216 #define mld6_code       mld_code
 217 #define mld6_cksum      mld_cksum
 218 #define mld6_maxdelay   mld_maxdelay
 219 #define mld6_reserved   mld_reserved
 220 #define mld6_addr       mld_addr
 221 #endif
 222
 223 /* shortcut macro definitions */
 224 #define mld_type        mld_icmp6_hdr.icmp6_type
 225 #define mld_code        mld_icmp6_hdr.icmp6_code
 226 #define mld_cksum       mld_icmp6_hdr.icmp6_cksum
 227 #define mld_maxdelay    mld_icmp6_hdr.icmp6_data16[0]
 228 #define mld_reserved    mld_icmp6_hdr.icmp6_data16[1]
 229 #define mld_v2_reserved mld_icmp6_hdr.icmp6_data16[0]
 230 #define mld_v2_numrecs  mld_icmp6_hdr.icmp6_data16[1]
 231
 232 /*
 233  * Neighbor Discovery
 234  */
 235
 236 struct nd_router_solicit {      /* router solicitation */
 237         struct icmp6_hdr        nd_rs_hdr;
 238         /* could be followed by options */
 239 }__attribute__((__packed__));
 240
 241 #define nd_rs_type      nd_rs_hdr.icmp6_type
 242 #define nd_rs_code      nd_rs_hdr.icmp6_code
 243 #define nd_rs_cksum     nd_rs_hdr.icmp6_cksum
 244 #define nd_rs_reserved  nd_rs_hdr.icmp6_data32[0]
 245
 246 struct nd_router_advert {       /* router advertisement */
 247         struct icmp6_hdr        nd_ra_hdr;
 248         u_int32_t               nd_ra_reachable;        /* reachable time */
 249         u_int32_t               nd_ra_retransmit;       /* retransmit timer */
 250         /* could be followed by options */
 251 } __attribute__((__packed__));
 252
 253 #define nd_ra_type              nd_ra_hdr.icmp6_type
 254 #define nd_ra_code              nd_ra_hdr.icmp6_code
 255 #define nd_ra_cksum             nd_ra_hdr.icmp6_cksum
 256 #define nd_ra_curhoplimit       nd_ra_hdr.icmp6_data8[0]
 257 #define nd_ra_flags_reserved    nd_ra_hdr.icmp6_data8[1]
 258 #define ND_RA_FLAG_MANAGED      0x80
 259 #define ND_RA_FLAG_OTHER        0x40
 260 #define ND_RA_FLAG_HA           0x20
 261
 262 /*
 263  * Router preference values based on draft-draves-ipngwg-router-selection-01.
 264  * These are non-standard definitions.
 265  */
 266 #define ND_RA_FLAG_RTPREF_MASK  0x18 /* 00011000 */
 267
 268 #define ND_RA_FLAG_RTPREF_HIGH  0x08 /* 00001000 */
 269 #define ND_RA_FLAG_RTPREF_MEDIUM        0x00 /* 00000000 */
 270 #define ND_RA_FLAG_RTPREF_LOW   0x18 /* 00011000 */
 271 #define ND_RA_FLAG_RTPREF_RSV   0x10 /* 00010000 */
 272
 273 #define nd_ra_router_lifetime   nd_ra_hdr.icmp6_data16[1]
 274
 275 struct nd_neighbor_solicit {    /* neighbor solicitation */
 276         struct icmp6_hdr        nd_ns_hdr;
 277         struct in6_addr         nd_ns_target;   /*target address */
 278         /* could be followed by options */
 279 }__attribute__((__packed__));
 280
 281 #define nd_ns_type              nd_ns_hdr.icmp6_type
 282 #define nd_ns_code              nd_ns_hdr.icmp6_code
 283 #define nd_ns_cksum             nd_ns_hdr.icmp6_cksum
 284 #define nd_ns_reserved          nd_ns_hdr.icmp6_data32[0]
 285
 286 struct nd_neighbor_advert {     /* neighbor advertisement */
 287         struct icmp6_hdr        nd_na_hdr;
 288         struct in6_addr         nd_na_target;   /* target address */
 289         /* could be followed by options */
 290 }__attribute__((__packed__));
 291
 292 #define nd_na_type              nd_na_hdr.icmp6_type
 293 #define nd_na_code              nd_na_hdr.icmp6_code
 294 #define nd_na_cksum             nd_na_hdr.icmp6_cksum
 295 #define nd_na_flags_reserved    nd_na_hdr.icmp6_data32[0]
 296 #if BYTE_ORDER == BIG_ENDIAN
 297 #define ND_NA_FLAG_ROUTER               0x80000000
 298 #define ND_NA_FLAG_SOLICITED            0x40000000
 299 #define ND_NA_FLAG_OVERRIDE             0x20000000
 300 #else
 301 #if BYTE_ORDER == LITTLE_ENDIAN
 302 #define ND_NA_FLAG_ROUTER               0x80
 303 #define ND_NA_FLAG_SOLICITED            0x40
 304 #define ND_NA_FLAG_OVERRIDE             0x20
 305 #endif
 306 #endif
 307
 308 struct nd_redirect {            /* redirect */
 309         struct icmp6_hdr        nd_rd_hdr;
 310         struct in6_addr         nd_rd_target;   /* target address */
 311         struct in6_addr         nd_rd_dst;      /* destination address */
 312         /* could be followed by options */
 313 }__attribute__((__packed__));
 314
 315 #define nd_rd_type              nd_rd_hdr.icmp6_type
 316 #define nd_rd_code              nd_rd_hdr.icmp6_code
 317 #define nd_rd_cksum             nd_rd_hdr.icmp6_cksum
 318 #define nd_rd_reserved          nd_rd_hdr.icmp6_data32[0]
 319
 320 struct nd_opt_hdr {             /* Neighbor discovery option header */
 321         u_int8_t        nd_opt_type;
 322         u_int8_t        nd_opt_len;
 323         /* followed by option specific data*/
 324 }__attribute__((__packed__));
 325
 326 #define ND_OPT_SOURCE_LINKADDR          1
 327 #define ND_OPT_TARGET_LINKADDR          2
 328 #define ND_OPT_PREFIX_INFORMATION       3
 329 #define ND_OPT_REDIRECTED_HEADER        4
 330 #define ND_OPT_MTU                      5
 331 #define ND_OPT_NONCE                    14      /* RFC 3971 */
 332 #define ND_OPT_RDNSS                    25      /* RFC 6106 */
 333 #define ND_OPT_DNSSL                    31      /* RFC 6106 */
 334
 335 #define ND_OPT_ROUTE_INFO               200     /* draft-ietf-ipngwg-router-preference, not officially assigned yet */
 336
 337 struct nd_opt_prefix_info {     /* prefix information */
 338         u_int8_t        nd_opt_pi_type;
 339         u_int8_t        nd_opt_pi_len;
 340         u_int8_t        nd_opt_pi_prefix_len;
 341         u_int8_t        nd_opt_pi_flags_reserved;
 342         u_int32_t       nd_opt_pi_valid_time;
 343         u_int32_t       nd_opt_pi_preferred_time;
 344         u_int32_t       nd_opt_pi_reserved2;
 345         struct in6_addr nd_opt_pi_prefix;
 346 }__attribute__((__packed__));
 347
 348 #define ND_OPT_PI_FLAG_ONLINK           0x80
 349 #define ND_OPT_PI_FLAG_AUTO             0x40
 350
 351 #define ND_OPT_NONCE_LEN        ((1 * 8) - 2)
 352 #if ((ND_OPT_NONCE_LEN + 2) % 8) != 0
 353 #error "(ND_OPT_NONCE_LEN + 2) must be a multiple of 8."
 354 #endif
 355
 356 struct nd_opt_nonce {           /* nonce option */
 357         u_int8_t        nd_opt_nonce_type;
 358         u_int8_t        nd_opt_nonce_len;
 359         u_int8_t        nd_opt_nonce[ND_OPT_NONCE_LEN];
 360 } __attribute__((__packed__));
 361
 362 struct nd_opt_rd_hdr {          /* redirected header */
 363         u_int8_t        nd_opt_rh_type;
 364         u_int8_t        nd_opt_rh_len;
 365         u_int16_t       nd_opt_rh_reserved1;
 366         u_int32_t       nd_opt_rh_reserved2;
 367         /* followed by IP header and data */
 368 } __attribute__((__packed__));
 369
 370 struct nd_opt_mtu {             /* MTU option */
 371         u_int8_t        nd_opt_mtu_type;
 372         u_int8_t        nd_opt_mtu_len;
 373         u_int16_t       nd_opt_mtu_reserved;
 374         u_int32_t       nd_opt_mtu_mtu;
 375 }__attribute__((__packed__));
 376
 377 struct nd_opt_route_info {      /* route info */
 378         u_int8_t        nd_opt_rti_type;
 379         u_int8_t        nd_opt_rti_len;
 380         u_int8_t        nd_opt_rti_prefixlen;
 381         u_int8_t        nd_opt_rti_flags;
 382         u_int32_t       nd_opt_rti_lifetime;
 383         /* prefix follows */
 384 }__attribute__((__packed__));
 385
 386 struct nd_opt_rdnss {   /* recursive domain name system servers */
 387     u_int8_t            nd_opt_rdnss_type;
 388     u_int8_t            nd_opt_rdnss_len;
 389     u_int16_t           nd_opt_rdnss_reserved;
 390     u_int32_t           nd_opt_rdnss_lifetime;
 391     struct in6_addr     nd_opt_rdnss_addr[1];
 392 } __attribute__((__packed__));
 393
 394 struct nd_opt_dnssl {   /* domain name search list */
 395     u_int8_t            nd_opt_dnssl_type;
 396     u_int8_t            nd_opt_dnssl_len;
 397     u_int16_t           nd_opt_dnssl_reserved;
 398     u_int32_t           nd_opt_dnssl_lifetime;
 399     u_int8_t            nd_opt_dnssl_domains[8];
 400 } __attribute__((__packed__));
 401
 402 /*
 403  * icmp6 namelookup
 404  */
 405
 406 struct icmp6_namelookup {
 407         struct icmp6_hdr        icmp6_nl_hdr;
 408         u_int8_t        icmp6_nl_nonce[8];
 409         int32_t         icmp6_nl_ttl;
 410 #if 0
 411         u_int8_t        icmp6_nl_len;
 412         u_int8_t        icmp6_nl_name[3];
 413 #endif
 414         /* could be followed by options */
 415 }__attribute__((__packed__));
 416
 417 /*
 418  * icmp6 node information
 419  */
 420 struct icmp6_nodeinfo {
 421         struct icmp6_hdr icmp6_ni_hdr;
 422         u_int8_t icmp6_ni_nonce[8];
 423         /* could be followed by reply data */
 424 }__attribute__((__packed__));
 425
 426 #define ni_type         icmp6_ni_hdr.icmp6_type
 427 #define ni_code         icmp6_ni_hdr.icmp6_code
 428 #define ni_cksum        icmp6_ni_hdr.icmp6_cksum
 429 #define ni_qtype        icmp6_ni_hdr.icmp6_data16[0]
 430 #define ni_flags        icmp6_ni_hdr.icmp6_data16[1]
 431
 432 #define NI_QTYPE_NOOP           0 /* NOOP  */
 433 #define NI_QTYPE_SUPTYPES       1 /* Supported Qtypes */
 434 #define NI_QTYPE_FQDN           2 /* FQDN (draft 04) */
 435 #define NI_QTYPE_DNSNAME        2 /* DNS Name */
 436 #define NI_QTYPE_NODEADDR       3 /* Node Addresses */
 437 #define NI_QTYPE_IPV4ADDR       4 /* IPv4 Addresses */
 438
 439 #if BYTE_ORDER == BIG_ENDIAN
 440 #define NI_SUPTYPE_FLAG_COMPRESS        0x1
 441 #define NI_FQDN_FLAG_VALIDTTL           0x1
 442 #elif BYTE_ORDER == LITTLE_ENDIAN
 443 #define NI_SUPTYPE_FLAG_COMPRESS        0x0100
 444 #define NI_FQDN_FLAG_VALIDTTL           0x0100
 445 #endif
 446
 447 #ifdef NAME_LOOKUPS_04
 448 #if BYTE_ORDER == BIG_ENDIAN
 449 #define NI_NODEADDR_FLAG_LINKLOCAL      0x1
 450 #define NI_NODEADDR_FLAG_SITELOCAL      0x2
 451 #define NI_NODEADDR_FLAG_GLOBAL         0x4
 452 #define NI_NODEADDR_FLAG_ALL            0x8
 453 #define NI_NODEADDR_FLAG_TRUNCATE       0x10
 454 #define NI_NODEADDR_FLAG_ANYCAST        0x20 /* just experimental. not in spec */
 455 #elif BYTE_ORDER == LITTLE_ENDIAN
 456 #define NI_NODEADDR_FLAG_LINKLOCAL      0x0100
 457 #define NI_NODEADDR_FLAG_SITELOCAL      0x0200
 458 #define NI_NODEADDR_FLAG_GLOBAL         0x0400
 459 #define NI_NODEADDR_FLAG_ALL            0x0800
 460 #define NI_NODEADDR_FLAG_TRUNCATE       0x1000
 461 #define NI_NODEADDR_FLAG_ANYCAST        0x2000 /* just experimental. not in spec */
 462 #endif
 463 #else  /* draft-ietf-ipngwg-icmp-name-lookups-05 (and later?) */
 464 #if BYTE_ORDER == BIG_ENDIAN
 465 #define NI_NODEADDR_FLAG_TRUNCATE       0x1
 466 #define NI_NODEADDR_FLAG_ALL            0x2
 467 #define NI_NODEADDR_FLAG_COMPAT         0x4
 468 #define NI_NODEADDR_FLAG_LINKLOCAL      0x8
 469 #define NI_NODEADDR_FLAG_SITELOCAL      0x10
 470 #define NI_NODEADDR_FLAG_GLOBAL         0x20
 471 #define NI_NODEADDR_FLAG_ANYCAST        0x40 /* just experimental. not in spec */
 472 #elif BYTE_ORDER == LITTLE_ENDIAN
 473 #define NI_NODEADDR_FLAG_TRUNCATE       0x0100
 474 #define NI_NODEADDR_FLAG_ALL            0x0200
 475 #define NI_NODEADDR_FLAG_COMPAT         0x0400
 476 #define NI_NODEADDR_FLAG_LINKLOCAL      0x0800
 477 #define NI_NODEADDR_FLAG_SITELOCAL      0x1000
 478 #define NI_NODEADDR_FLAG_GLOBAL         0x2000
 479 #define NI_NODEADDR_FLAG_ANYCAST        0x4000 /* just experimental. not in spec */
 480 #endif
 481 #endif
 482
 483 struct ni_reply_fqdn {
 484         u_int32_t ni_fqdn_ttl;  /* TTL */
 485         u_int8_t ni_fqdn_namelen; /* length in octets of the FQDN */
 486         u_int8_t ni_fqdn_name[3]; /* XXX: alignment */
 487 }__attribute__((__packed__));
 488
 489 /*
 490  * Router Renumbering. as router-renum-08.txt
 491  */
 492 struct icmp6_router_renum {     /* router renumbering header */
 493         struct icmp6_hdr        rr_hdr;
 494         u_int8_t        rr_segnum;
 495         u_int8_t        rr_flags;
 496         u_int16_t       rr_maxdelay;
 497         u_int32_t       rr_reserved;
 498 } __attribute__((__packed__));
 499
 500 #define ICMP6_RR_FLAGS_TEST             0x80
 501 #define ICMP6_RR_FLAGS_REQRESULT        0x40
 502 #define ICMP6_RR_FLAGS_FORCEAPPLY       0x20
 503 #define ICMP6_RR_FLAGS_SPECSITE         0x10
 504 #define ICMP6_RR_FLAGS_PREVDONE         0x08
 505
 506 #define rr_type         rr_hdr.icmp6_type
 507 #define rr_code         rr_hdr.icmp6_code
 508 #define rr_cksum        rr_hdr.icmp6_cksum
 509 #define rr_seqnum       rr_hdr.icmp6_data32[0]
 510
 511 struct rr_pco_match {           /* match prefix part */
 512         u_int8_t        rpm_code;
 513         u_int8_t        rpm_len;
 514         u_int8_t        rpm_ordinal;
 515         u_int8_t        rpm_matchlen;
 516         u_int8_t        rpm_minlen;
 517         u_int8_t        rpm_maxlen;
 518         u_int16_t       rpm_reserved;
 519         struct  in6_addr        rpm_prefix;
 520 } __attribute__((__packed__));
 521
 522 #define RPM_PCO_ADD             1
 523 #define RPM_PCO_CHANGE          2
 524 #define RPM_PCO_SETGLOBAL       3
 525 #define RPM_PCO_MAX             4
 526
 527 struct rr_pco_use {             /* use prefix part */
 528         u_int8_t        rpu_uselen;
 529         u_int8_t        rpu_keeplen;
 530         u_int8_t        rpu_ramask;
 531         u_int8_t        rpu_raflags;
 532         u_int32_t       rpu_vltime;
 533         u_int32_t       rpu_pltime;
 534         u_int32_t       rpu_flags;
 535         struct  in6_addr rpu_prefix;
 536 } __attribute__((__packed__));
 537 #define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK  0x80
 538 #define ICMP6_RR_PCOUSE_RAFLAGS_AUTO    0x40
 539
 540 #if BYTE_ORDER == BIG_ENDIAN
 541 #define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME     0x80000000
 542 #define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME     0x40000000
 543 #elif BYTE_ORDER == LITTLE_ENDIAN
 544 #define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME     0x80
 545 #define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME     0x40
 546 #endif
 547
 548 struct rr_result {              /* router renumbering result message */
 549         u_int16_t       rrr_flags;
 550         u_int8_t        rrr_ordinal;
 551         u_int8_t        rrr_matchedlen;
 552         u_int32_t       rrr_ifid;
 553         struct  in6_addr rrr_prefix;
 554 } __attribute__((__packed__));
 555 #if BYTE_ORDER == BIG_ENDIAN
 556 #define ICMP6_RR_RESULT_FLAGS_OOB               0x0002
 557 #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN         0x0001
 558 #elif BYTE_ORDER == LITTLE_ENDIAN
 559 #define ICMP6_RR_RESULT_FLAGS_OOB               0x0200
 560 #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN         0x0100
 561 #endif
 562
 563 /*
 564  * icmp6 filter structures.
 565  */
 566
 567 struct icmp6_filter {
 568         u_int32_t icmp6_filt[8];
 569 };
 570
 571 #ifdef KERNEL
 572 #define ICMP6_FILTER_SETPASSALL(filterp) \
 573 do {                                                            \
 574         int i; u_char *ptr;                                     \
 575         ptr = (u_char *)filterp;                                        \
 576         for (i = 0; i < sizeof(struct icmp6_filter); i++)       \
 577                 ptr[i] = 0xff;                                  \
 578 } while (0)
 579 #define ICMP6_FILTER_SETBLOCKALL(filterp) \
 580         bzero(filterp, sizeof(struct icmp6_filter))
 581 #else /* KERNEL */
 582 #define ICMP6_FILTER_SETPASSALL(filterp) \
 583         memset(filterp, 0xff, sizeof(struct icmp6_filter))
 584 #define ICMP6_FILTER_SETBLOCKALL(filterp) \
 585         memset(filterp, 0x00, sizeof(struct icmp6_filter))
 586 #endif /* KERNEL */
 587
 588 #define ICMP6_FILTER_SETPASS(type, filterp) \
 589         (((filterp)->icmp6_filt[(type) >> 5]) |= (1 << ((type) & 31)))
 590 #define ICMP6_FILTER_SETBLOCK(type, filterp) \
 591         (((filterp)->icmp6_filt[(type) >> 5]) &= ~(1 << ((type) & 31)))
 592 #define ICMP6_FILTER_WILLPASS(type, filterp) \
 593         ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) != 0)
 594 #define ICMP6_FILTER_WILLBLOCK(type, filterp) \
 595         ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) == 0)
 596
 597 /*
 598  * Variables related to this implementation
 599  * of the internet control message protocol version 6.
 600  */
 601 struct icmp6errstat {
 602         u_quad_t icp6errs_dst_unreach_noroute;
 603         u_quad_t icp6errs_dst_unreach_admin;
 604         u_quad_t icp6errs_dst_unreach_beyondscope;
 605         u_quad_t icp6errs_dst_unreach_addr;
 606         u_quad_t icp6errs_dst_unreach_noport;
 607         u_quad_t icp6errs_packet_too_big;
 608         u_quad_t icp6errs_time_exceed_transit;
 609         u_quad_t icp6errs_time_exceed_reassembly;
 610         u_quad_t icp6errs_paramprob_header;
 611         u_quad_t icp6errs_paramprob_nextheader;
 612         u_quad_t icp6errs_paramprob_option;
 613         u_quad_t icp6errs_redirect; /* we regard redirect as an error here */
 614         u_quad_t icp6errs_unknown;
 615 };
 616
 617 struct icmp6stat {
 618 /* statistics related to icmp6 packets generated */
 619         u_quad_t icp6s_error;           /* # of calls to icmp6_error */
 620         u_quad_t icp6s_canterror;       /* no error 'cuz old was icmp */
 621         u_quad_t icp6s_toofreq;         /* no error 'cuz rate limitation */
 622         u_quad_t icp6s_outhist[256];
 623 /* statistics related to input message processed */
 624         u_quad_t icp6s_badcode;         /* icmp6_code out of range */
 625         u_quad_t icp6s_tooshort;        /* packet < sizeof(struct icmp6_hdr) */
 626         u_quad_t icp6s_checksum;        /* bad checksum */
 627         u_quad_t icp6s_badlen;          /* calculated bound mismatch */
 628         u_quad_t icp6s_reflect;         /* number of responses */
 629         u_quad_t icp6s_inhist[256];
 630         u_quad_t icp6s_nd_toomanyopt;   /* too many ND options */
 631         struct icmp6errstat icp6s_outerrhist;
 632 #define icp6s_odst_unreach_noroute \
 633         icp6s_outerrhist.icp6errs_dst_unreach_noroute
 634 #define icp6s_odst_unreach_admin icp6s_outerrhist.icp6errs_dst_unreach_admin
 635 #define icp6s_odst_unreach_beyondscope \
 636         icp6s_outerrhist.icp6errs_dst_unreach_beyondscope
 637 #define icp6s_odst_unreach_addr icp6s_outerrhist.icp6errs_dst_unreach_addr
 638 #define icp6s_odst_unreach_noport icp6s_outerrhist.icp6errs_dst_unreach_noport
 639 #define icp6s_opacket_too_big icp6s_outerrhist.icp6errs_packet_too_big
 640 #define icp6s_otime_exceed_transit \
 641         icp6s_outerrhist.icp6errs_time_exceed_transit
 642 #define icp6s_otime_exceed_reassembly \
 643         icp6s_outerrhist.icp6errs_time_exceed_reassembly
 644 #define icp6s_oparamprob_header icp6s_outerrhist.icp6errs_paramprob_header
 645 #define icp6s_oparamprob_nextheader \
 646         icp6s_outerrhist.icp6errs_paramprob_nextheader
 647 #define icp6s_oparamprob_option icp6s_outerrhist.icp6errs_paramprob_option
 648 #define icp6s_oredirect icp6s_outerrhist.icp6errs_redirect
 649 #define icp6s_ounknown icp6s_outerrhist.icp6errs_unknown
 650         u_quad_t icp6s_pmtuchg;         /* path MTU changes */
 651         u_quad_t icp6s_nd_badopt;       /* bad ND options */
 652         u_quad_t icp6s_badns;           /* bad neighbor solicitation */
 653         u_quad_t icp6s_badna;           /* bad neighbor advertisement */
 654         u_quad_t icp6s_badrs;           /* bad router advertisement */
 655         u_quad_t icp6s_badra;           /* bad router advertisement */
 656         u_quad_t icp6s_badredirect;     /* bad redirect message */
 657         u_quad_t icp6s_rfc6980_drop;    /* NDP packet dropped based on RFC 6980 */
 658 };
 659
 660 /*
 661  * Names for ICMP sysctl objects
 662  */
 663 #define ICMPV6CTL_STATS                         1
 664 #define ICMPV6CTL_REDIRACCEPT           2       /* accept/process redirects */
 665 #define ICMPV6CTL_REDIRTIMEOUT          3       /* redirect cache time */
 666 #if 0   /*obsoleted*/
 667 #define ICMPV6CTL_ERRRATELIMIT          5       /* ICMPv6 error rate limitation */
 668 #endif
 669 #define ICMPV6CTL_ND6_PRUNE             6
 670 #define ICMPV6CTL_ND6_DELAY             8
 671 #define ICMPV6CTL_ND6_UMAXTRIES         9
 672 #define ICMPV6CTL_ND6_MMAXTRIES         10
 673 #define ICMPV6CTL_ND6_USELOOPBACK       11
 674 /*#define ICMPV6CTL_ND6_PROXYALL        12      obsoleted, do not reuse here */
 675 #define ICMPV6CTL_NODEINFO              13
 676 #define ICMPV6CTL_ERRPPSLIMIT           14      /* ICMPv6 error pps limitation */
 677 #define ICMPV6CTL_ND6_MAXNUDHINT        15
 678 #define ICMPV6CTL_MTUDISC_HIWAT         16
 679 #define ICMPV6CTL_MTUDISC_LOWAT         17
 680 #define ICMPV6CTL_ND6_DEBUG             18
 681 #define ICMPV6CTL_ND6_DRLIST            19
 682 #define ICMPV6CTL_ND6_PRLIST            20
 683 #define ICMPV6CTL_MLD_MAXSRCFILTER      21
 684 #define ICMPV6CTL_MLD_SOMAXSRC          22
 685 #define ICMPV6CTL_MLD_VERSION           23
 686 #define ICMPV6CTL_ND6_MAXQLEN           24
 687 #define ICMPV6CTL_ND6_ACCEPT_6TO4       25
 688 #define ICMPV6CTL_ND6_OPTIMISTIC_DAD    26      /* RFC 4429 */
 689 #define ICMPV6CTL_MAXID                 27
 690
 691 #ifdef BSD_KERNEL_PRIVATE
 692 #define ICMPV6CTL_NAMES { \
 693         { 0, 0 }, \
 694         { 0, 0 }, \
 695         { "rediraccept", CTLTYPE_INT }, \
 696         { "redirtimeout", CTLTYPE_INT }, \
 697         { 0, 0 }, \
 698         { 0, 0 }, \
 699         { "nd6_prune", CTLTYPE_INT }, \
 700         { 0, 0 }, \
 701         { "nd6_delay", CTLTYPE_INT }, \
 702         { "nd6_umaxtries", CTLTYPE_INT }, \
 703         { "nd6_mmaxtries", CTLTYPE_INT }, \
 704         { "nd6_useloopback", CTLTYPE_INT }, \
 705         { 0, 0 }, \
 706         { "nodeinfo", CTLTYPE_INT }, \
 707         { "errppslimit", CTLTYPE_INT }, \
 708         { "nd6_maxnudhint", CTLTYPE_INT }, \
 709         { "mtudisc_hiwat", CTLTYPE_INT }, \
 710         { "mtudisc_lowat", CTLTYPE_INT }, \
 711         { "nd6_debug", CTLTYPE_INT }, \
 712         { 0, 0 }, \
 713         { 0, 0 }, \
 714         { 0, 0 }, \
 715         { 0, 0 }, \
 716         { 0, 0 }, \
 717         { 0, 0 }, \
 718         { "nd6_accept_6to4", CTLTYPE_INT }, \
 719         { "nd6_optimistic_dad", CTLTYPE_INT }, \
 720 }
 721
 722 # ifdef __STDC__
 723 struct  rtentry;
 724 struct  rttimer;
 725 struct  in6_multi;
 726 # endif
 727 struct ip6protosw;
 728 void    icmp6_init(struct ip6protosw *, struct domain *);
 729 void    icmp6_paramerror(struct mbuf *, int);
 730
 731 void    icmp6_error_flag(struct mbuf *, int, int, int, int);
 732 #define ICMP6_ERROR_RST_MRCVIF  0x1
 733
 734 void    icmp6_error(struct mbuf *, int, int, int);
 735 void    icmp6_error2(struct mbuf *, int, int, int, struct ifnet *);
 736 int     icmp6_input(struct mbuf **, int *, int);
 737 void    icmp6_reflect(struct mbuf *, size_t);
 738 void    icmp6_prepare(struct mbuf *);
 739 void    icmp6_redirect_input(struct mbuf *, int);
 740 void    icmp6_redirect_output(struct mbuf *, struct rtentry *);
 741
 742 struct  ip6ctlparam;
 743 void    icmp6_mtudisc_update(struct ip6ctlparam *, int);
 744
 745 extern lck_rw_t icmp6_ifs_rwlock;
 746 /* XXX: is this the right place for these macros? */
 747 /* N.B.: if_inet6data is never freed once set, so we don't need to lock */
 748 #define icmp6_ifstat_inc(_ifp, _tag) do {                       \
 749         if (_ifp != NULL && IN6_IFEXTRA(_ifp) != NULL) {        \
 750                 IN6_IFEXTRA(_ifp)->icmp6_ifstat._tag++;         \
 751         }                                                       \
 752 } while (0)
 753
 754 #define icmp6_ifoutstat_inc(ifp, type, code) do {               \
 755         icmp6_ifstat_inc(ifp, ifs6_out_msg);                    \
 756         if (type < ICMP6_INFOMSG_MASK)                          \
 757                 icmp6_ifstat_inc(ifp, ifs6_out_error);          \
 758         switch (type) {                                         \
 759         case ICMP6_DST_UNREACH:                                 \
 760                 icmp6_ifstat_inc(ifp, ifs6_out_dstunreach);     \
 761                 if (code == ICMP6_DST_UNREACH_ADMIN)            \
 762                         icmp6_ifstat_inc(ifp, ifs6_out_adminprohib);\
 763                  break;                                         \
 764         case ICMP6_PACKET_TOO_BIG:                              \
 765                 icmp6_ifstat_inc(ifp, ifs6_out_pkttoobig);      \
 766                 break;                                          \
 767         case ICMP6_TIME_EXCEEDED:                               \
 768                 icmp6_ifstat_inc(ifp, ifs6_out_timeexceed);     \
 769                 break;                                          \
 770         case ICMP6_PARAM_PROB:                                  \
 771                 icmp6_ifstat_inc(ifp, ifs6_out_paramprob);      \
 772                 break;                                          \
 773         case ICMP6_ECHO_REQUEST:                                \
 774                 icmp6_ifstat_inc(ifp, ifs6_out_echo);           \
 775                 break;                                          \
 776         case ICMP6_ECHO_REPLY:                                  \
 777                 icmp6_ifstat_inc(ifp, ifs6_out_echoreply);      \
 778                 break;                                          \
 779         case MLD_LISTENER_QUERY:                                \
 780                 icmp6_ifstat_inc(ifp, ifs6_out_mldquery);       \
 781                 break;                                          \
 782         case MLD_LISTENER_REPORT:                               \
 783                 icmp6_ifstat_inc(ifp, ifs6_out_mldreport);      \
 784                 break;                                          \
 785         case MLD_LISTENER_DONE:                                 \
 786                 icmp6_ifstat_inc(ifp, ifs6_out_mlddone);        \
 787                 break;                                          \
 788         case ND_ROUTER_SOLICIT:                                 \
 789                 icmp6_ifstat_inc(ifp, ifs6_out_routersolicit);  \
 790                 break;                                          \
 791         case ND_ROUTER_ADVERT:                                  \
 792                 icmp6_ifstat_inc(ifp, ifs6_out_routeradvert);   \
 793                 break;                                          \
 794         case ND_NEIGHBOR_SOLICIT:                               \
 795                 icmp6_ifstat_inc(ifp, ifs6_out_neighborsolicit);\
 796                 break;                                          \
 797         case ND_NEIGHBOR_ADVERT:                                \
 798                 icmp6_ifstat_inc(ifp, ifs6_out_neighboradvert); \
 799                 break;                                          \
 800         case ND_REDIRECT:                                       \
 801                 icmp6_ifstat_inc(ifp, ifs6_out_redirect);       \
 802                 break;                                          \
 803         }                                                       \
 804 } while (0)
 805
 806 extern int      icmp6_rediraccept;      /* accept/process redirects */
 807 extern int      icmp6_redirtimeout;     /* cache time for redirect routes */
 808
 809 #define ICMP6_NODEINFO_FQDNOK           0x1
 810 #define ICMP6_NODEINFO_NODEADDROK       0x2
 811 #define ICMP6_NODEINFO_TMPADDROK        0x4
 812 #define ICMP6_NODEINFO_GLOBALOK         0x8
 813
 814 #endif /* BSD_KERNEL_PRIVATE */
 815
 816 #endif /* !_NETINET_ICMP6_H_ */