sys/netinet/icmp6.h

   1 /*      $NetBSD: icmp6.h,v 1.47 2013/07/01 12:43:15 christos Exp $      */
   2 /*      $KAME: icmp6.h,v 1.84 2003/04/23 10:26:51 itojun Exp $  */
   3
   4
   5 /*
   6  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the name of the project nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 /*
  35  * Copyright (c) 1982, 1986, 1993
  36  *      The Regents of the University of California.  All rights reserved.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  * 1. Redistributions of source code must retain the above copyright
  42  *    notice, this list of conditions and the following disclaimer.
  43  * 2. Redistributions in binary form must reproduce the above copyright
  44  *    notice, this list of conditions and the following disclaimer in the
  45  *    documentation and/or other materials provided with the distribution.
  46  * 3. Neither the name of the University nor the names of its contributors
  47  *    may be used to endorse or promote products derived from this software
  48  *    without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  51  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  53  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  54  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  55  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  56  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  57  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  58  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  59  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  60  * SUCH DAMAGE.
  61  *
  62  *      @(#)ip_icmp.h   8.1 (Berkeley) 6/10/93
  63  */
  64
  65 #ifndef _NETINET_ICMP6_H_
  66 #define _NETINET_ICMP6_H_
  67
  68 #define ICMPV6_PLD_MAXLEN       1232    /* IPV6_MMTU - sizeof(struct ip6_hdr)
  69                                            - sizeof(struct icmp6_hdr) */
  70
  71 struct icmp6_hdr {
  72         u_int8_t        icmp6_type;     /* type field */
  73         u_int8_t        icmp6_code;     /* code field */
  74         u_int16_t       icmp6_cksum;    /* checksum field */
  75         union {
  76                 u_int32_t       icmp6_un_data32[1]; /* type-specific field */
  77                 u_int16_t       icmp6_un_data16[2]; /* type-specific field */
  78                 u_int8_t        icmp6_un_data8[4];  /* type-specific field */
  79         } icmp6_dataun;
  80 } __packed;
  81
  82 #define icmp6_data32    icmp6_dataun.icmp6_un_data32
  83 #define icmp6_data16    icmp6_dataun.icmp6_un_data16
  84 #define icmp6_data8     icmp6_dataun.icmp6_un_data8
  85 #define icmp6_pptr      icmp6_data32[0]         /* parameter prob */
  86 #define icmp6_mtu       icmp6_data32[0]         /* packet too big */
  87 #define icmp6_id        icmp6_data16[0]         /* echo request/reply */
  88 #define icmp6_seq       icmp6_data16[1]         /* echo request/reply */
  89 #define icmp6_maxdelay  icmp6_data16[0]         /* mcast group membership */
  90
  91 #define ICMP6_DST_UNREACH               1       /* dest unreachable, codes: */
  92 #define ICMP6_PACKET_TOO_BIG            2       /* packet too big */
  93 #define ICMP6_TIME_EXCEEDED             3       /* time exceeded, code: */
  94 #define ICMP6_PARAM_PROB                4       /* ip6 header bad */
  95
  96 #define ICMP6_ECHO_REQUEST              128     /* echo service */
  97 #define ICMP6_ECHO_REPLY                129     /* echo reply */
  98 #define MLD_LISTENER_QUERY              130     /* multicast listener query */
  99 #define MLD_LISTENER_REPORT             131     /* multicast listener report */
 100 #define MLD_LISTENER_DONE               132     /* multicast listener done */
 101 #define MLD_LISTENER_REDUCTION MLD_LISTENER_DONE /* RFC3542 definition */
 102
 103 /* RFC2292 decls */
 104 #define ICMP6_MEMBERSHIP_QUERY          130     /* group membership query */
 105 #define ICMP6_MEMBERSHIP_REPORT         131     /* group membership report */
 106 #define ICMP6_MEMBERSHIP_REDUCTION      132     /* group membership termination */
 107
 108 #ifndef _KERNEL
 109 /* the followings are for backward compatibility to old KAME apps. */
 110 #define MLD6_LISTENER_QUERY     MLD_LISTENER_QUERY
 111 #define MLD6_LISTENER_REPORT    MLD_LISTENER_REPORT
 112 #define MLD6_LISTENER_DONE      MLD_LISTENER_DONE
 113 #endif
 114
 115 #define ND_ROUTER_SOLICIT               133     /* router solicitation */
 116 #define ND_ROUTER_ADVERT                134     /* router advertisement */
 117 #define ND_NEIGHBOR_SOLICIT             135     /* neighbor solicitation */
 118 #define ND_NEIGHBOR_ADVERT              136     /* neighbor advertisement */
 119 #define ND_REDIRECT                     137     /* redirect */
 120
 121 #define ICMP6_ROUTER_RENUMBERING        138     /* router renumbering */
 122
 123 #define ICMP6_WRUREQUEST                139     /* who are you request */
 124 #define ICMP6_WRUREPLY                  140     /* who are you reply */
 125 #define ICMP6_FQDN_QUERY                139     /* FQDN query */
 126 #define ICMP6_FQDN_REPLY                140     /* FQDN reply */
 127 #define ICMP6_NI_QUERY                  139     /* node information request */
 128 #define ICMP6_NI_REPLY                  140     /* node information reply */
 129 #define MLDV2_LISTENER_REPORT           143     /* RFC3810 listener report */
 130
 131 /* The definitions below are experimental. TBA */
 132 #define MLD_MTRACE_RESP                 200     /* mtrace response(to sender) */
 133 #define MLD_MTRACE                      201     /* mtrace messages */
 134
 135 #ifndef _KERNEL
 136 /* the followings are for backward compatibility to old KAME apps. */
 137 #define MLD6_MTRACE_RESP        MLD_MTRACE_RESP
 138 #define MLD6_MTRACE             MLD_MTRACE
 139 #endif
 140
 141 #define ICMP6_MAXTYPE                   201
 142
 143 #define ICMP6_DST_UNREACH_NOROUTE       0       /* no route to destination */
 144 #define ICMP6_DST_UNREACH_ADMIN         1       /* administratively prohibited */
 145 #define ICMP6_DST_UNREACH_NOTNEIGHBOR   2       /* not a neighbor(obsolete) */
 146 #define ICMP6_DST_UNREACH_BEYONDSCOPE   2       /* beyond scope of source address */
 147 #define ICMP6_DST_UNREACH_ADDR          3       /* address unreachable */
 148 #define ICMP6_DST_UNREACH_NOPORT        4       /* port unreachable */
 149 #define ICMP6_DST_UNREACH_POLICY        5       /* source address failed ingress/egress policy */
 150 #define ICMP6_DST_UNREACH_REJROUTE      6       /* reject route to destination */
 151 #define ICMP6_DST_UNREACH_SOURCERT      7       /* error in source routing header */
 152
 153 #define ICMP6_TIME_EXCEED_TRANSIT       0       /* ttl==0 in transit */
 154 #define ICMP6_TIME_EXCEED_REASSEMBLY    1       /* ttl==0 in reass */
 155
 156 #define ICMP6_PARAMPROB_HEADER          0       /* erroneous header field */
 157 #define ICMP6_PARAMPROB_NEXTHEADER      1       /* unrecognized next header */
 158 #define ICMP6_PARAMPROB_OPTION          2       /* unrecognized option */
 159
 160 #define ICMP6_INFOMSG_MASK              0x80    /* all informational messages */
 161
 162 #define ICMP6_NI_SUBJ_IPV6      0       /* Query Subject is an IPv6 address */
 163 #define ICMP6_NI_SUBJ_FQDN      1       /* Query Subject is a Domain name */
 164 #define ICMP6_NI_SUBJ_IPV4      2       /* Query Subject is an IPv4 address */
 165
 166 #define ICMP6_NI_SUCCESS        0       /* node information successful reply */
 167 #define ICMP6_NI_REFUSED        1       /* node information request is refused */
 168 #define ICMP6_NI_UNKNOWN        2       /* unknown Qtype */
 169
 170 #define ICMP6_ROUTER_RENUMBERING_COMMAND  0     /* rr command */
 171 #define ICMP6_ROUTER_RENUMBERING_RESULT   1     /* rr result */
 172 #define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET   255     /* rr seq num reset */
 173
 174 /* Used in kernel only */
 175 #define ND_REDIRECT_ONLINK      0       /* redirect to an on-link node */
 176 #define ND_REDIRECT_ROUTER      1       /* redirect to a better router */
 177
 178 /*
 179  * Multicast Listener Discovery
 180  */
 181 struct mld_hdr {
 182         struct icmp6_hdr        mld_icmp6_hdr;
 183         struct in6_addr         mld_addr; /* multicast address */
 184 } __packed;
 185
 186 /* definitions to provide backward compatibility to old KAME applications */
 187 #ifndef _KERNEL
 188 #define mld6_hdr        mld_hdr
 189 #define mld6_type       mld_type
 190 #define mld6_code       mld_code
 191 #define mld6_cksum      mld_cksum
 192 #define mld6_maxdelay   mld_maxdelay
 193 #define mld6_reserved   mld_reserved
 194 #define mld6_addr       mld_addr
 195 #endif
 196
 197 /* shortcut macro definitions */
 198 #define mld_type        mld_icmp6_hdr.icmp6_type
 199 #define mld_code        mld_icmp6_hdr.icmp6_code
 200 #define mld_cksum       mld_icmp6_hdr.icmp6_cksum
 201 #define mld_maxdelay    mld_icmp6_hdr.icmp6_data16[0]
 202 #define mld_reserved    mld_icmp6_hdr.icmp6_data16[1]
 203
 204 #define MLD_MINLEN                      24
 205
 206 /*
 207  * Neighbor Discovery
 208  */
 209
 210 struct nd_router_solicit {      /* router solicitation */
 211         struct icmp6_hdr        nd_rs_hdr;
 212         /* could be followed by options */
 213 } __packed;
 214
 215 #define nd_rs_type      nd_rs_hdr.icmp6_type
 216 #define nd_rs_code      nd_rs_hdr.icmp6_code
 217 #define nd_rs_cksum     nd_rs_hdr.icmp6_cksum
 218 #define nd_rs_reserved  nd_rs_hdr.icmp6_data32[0]
 219
 220 struct nd_router_advert {       /* router advertisement */
 221         struct icmp6_hdr        nd_ra_hdr;
 222         u_int32_t               nd_ra_reachable;        /* reachable time */
 223         u_int32_t               nd_ra_retransmit;       /* retransmit timer */
 224         /* could be followed by options */
 225 } __packed;
 226
 227 #define nd_ra_type              nd_ra_hdr.icmp6_type
 228 #define nd_ra_code              nd_ra_hdr.icmp6_code
 229 #define nd_ra_cksum             nd_ra_hdr.icmp6_cksum
 230 #define nd_ra_curhoplimit       nd_ra_hdr.icmp6_data8[0]
 231 #define nd_ra_flags_reserved    nd_ra_hdr.icmp6_data8[1]
 232 #define ND_RA_FLAG_MANAGED      0x80
 233 #define ND_RA_FLAG_OTHER        0x40
 234 #define ND_RA_FLAG_HOME_AGENT   0x20
 235
 236 /*
 237  * Router preference values based on RFC4191.
 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 } __packed;
 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 } __packed;
 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 } __packed;
 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 } __packed;
 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 #define ND_OPT_ADVINTERVAL              7
 305 #define ND_OPT_HOMEAGENT_INFO           8
 306 #define ND_OPT_SOURCE_ADDRLIST          9
 307 #define ND_OPT_TARGET_ADDRLIST          10
 308 #define ND_OPT_MAP                      23      /* RFC 5380 */
 309 #define ND_OPT_ROUTE_INFO               24      /* RFC 4191 */
 310 #define ND_OPT_RDNSS                    25      /* RFC 6016 */
 311 #define ND_OPT_DNSSL                    31      /* RFC 6016 */
 312
 313 struct nd_opt_route_info {      /* route info */
 314         u_int8_t        nd_opt_rti_type;
 315         u_int8_t        nd_opt_rti_len;
 316         u_int8_t        nd_opt_rti_prefixlen;
 317         u_int8_t        nd_opt_rti_flags;
 318         u_int32_t       nd_opt_rti_lifetime;
 319         /* prefix follows */
 320 };
 321
 322 struct nd_opt_prefix_info {     /* prefix information */
 323         u_int8_t        nd_opt_pi_type;
 324         u_int8_t        nd_opt_pi_len;
 325         u_int8_t        nd_opt_pi_prefix_len;
 326         u_int8_t        nd_opt_pi_flags_reserved;
 327         u_int32_t       nd_opt_pi_valid_time;
 328         u_int32_t       nd_opt_pi_preferred_time;
 329         u_int32_t       nd_opt_pi_reserved2;
 330         struct in6_addr nd_opt_pi_prefix;
 331 } __packed;
 332
 333 #define ND_OPT_PI_FLAG_ONLINK           0x80
 334 #define ND_OPT_PI_FLAG_AUTO             0x40
 335
 336 struct nd_opt_rd_hdr {          /* redirected header */
 337         u_int8_t        nd_opt_rh_type;
 338         u_int8_t        nd_opt_rh_len;
 339         u_int16_t       nd_opt_rh_reserved1;
 340         u_int32_t       nd_opt_rh_reserved2;
 341         /* followed by IP header and data */
 342 } __packed;
 343
 344 struct nd_opt_mtu {             /* MTU option */
 345         u_int8_t        nd_opt_mtu_type;
 346         u_int8_t        nd_opt_mtu_len;
 347         u_int16_t       nd_opt_mtu_reserved;
 348         u_int32_t       nd_opt_mtu_mtu;
 349 } __packed;
 350
 351 struct nd_opt_rdnss {           /* RDNSS option RFC 6106 */
 352         u_int8_t        nd_opt_rdnss_type;
 353         u_int8_t        nd_opt_rdnss_len;
 354         u_int16_t       nd_opt_rdnss_reserved;
 355         u_int32_t       nd_opt_rdnss_lifetime;
 356         /* followed by list of IP prefixes */
 357 } __packed;
 358
 359 struct nd_opt_dnssl {           /* DNSSL option RFC 6106 */
 360         u_int8_t        nd_opt_dnssl_type;
 361         u_int8_t        nd_opt_dnssl_len;
 362         u_int16_t       nd_opt_dnssl_reserved;
 363         u_int32_t       nd_opt_dnssl_lifetime;
 364         /* followed by list of IP prefixes */
 365 } __packed;
 366
 367 /*
 368  * icmp6 namelookup
 369  */
 370
 371 struct icmp6_namelookup {
 372         struct icmp6_hdr        icmp6_nl_hdr;
 373         u_int8_t        icmp6_nl_nonce[8];
 374         int32_t         icmp6_nl_ttl;
 375 #if 0
 376         u_int8_t        icmp6_nl_len;
 377         u_int8_t        icmp6_nl_name[3];
 378 #endif
 379         /* could be followed by options */
 380 } __packed;
 381
 382 /*
 383  * icmp6 node information
 384  */
 385 struct icmp6_nodeinfo {
 386         struct icmp6_hdr icmp6_ni_hdr;
 387         u_int8_t icmp6_ni_nonce[8];
 388         /* could be followed by reply data */
 389 } __packed;
 390
 391 #define ni_type         icmp6_ni_hdr.icmp6_type
 392 #define ni_code         icmp6_ni_hdr.icmp6_code
 393 #define ni_cksum        icmp6_ni_hdr.icmp6_cksum
 394 #define ni_qtype        icmp6_ni_hdr.icmp6_data16[0]
 395 #define ni_flags        icmp6_ni_hdr.icmp6_data16[1]
 396
 397 #define NI_QTYPE_NOOP           0 /* NOOP  */
 398 #define NI_QTYPE_SUPTYPES       1 /* Supported Qtypes */
 399 #define NI_QTYPE_FQDN           2 /* FQDN (draft 04) */
 400 #define NI_QTYPE_DNSNAME        2 /* DNS Name */
 401 #define NI_QTYPE_NODEADDR       3 /* Node Addresses */
 402 #define NI_QTYPE_IPV4ADDR       4 /* IPv4 Addresses */
 403
 404 #if BYTE_ORDER == BIG_ENDIAN
 405 #define NI_SUPTYPE_FLAG_COMPRESS        0x1
 406 #define NI_FQDN_FLAG_VALIDTTL           0x1
 407 #elif BYTE_ORDER == LITTLE_ENDIAN
 408 #define NI_SUPTYPE_FLAG_COMPRESS        0x0100
 409 #define NI_FQDN_FLAG_VALIDTTL           0x0100
 410 #endif
 411
 412 #ifdef NAME_LOOKUPS_04
 413 #if BYTE_ORDER == BIG_ENDIAN
 414 #define NI_NODEADDR_FLAG_LINKLOCAL      0x1
 415 #define NI_NODEADDR_FLAG_SITELOCAL      0x2
 416 #define NI_NODEADDR_FLAG_GLOBAL         0x4
 417 #define NI_NODEADDR_FLAG_ALL            0x8
 418 #define NI_NODEADDR_FLAG_TRUNCATE       0x10
 419 #define NI_NODEADDR_FLAG_ANYCAST        0x20 /* just experimental. not in spec */
 420 #elif BYTE_ORDER == LITTLE_ENDIAN
 421 #define NI_NODEADDR_FLAG_LINKLOCAL      0x0100
 422 #define NI_NODEADDR_FLAG_SITELOCAL      0x0200
 423 #define NI_NODEADDR_FLAG_GLOBAL         0x0400
 424 #define NI_NODEADDR_FLAG_ALL            0x0800
 425 #define NI_NODEADDR_FLAG_TRUNCATE       0x1000
 426 #define NI_NODEADDR_FLAG_ANYCAST        0x2000 /* just experimental. not in spec */
 427 #endif
 428 #else  /* draft-ietf-ipngwg-icmp-name-lookups-05 (and later?) */
 429 #if BYTE_ORDER == BIG_ENDIAN
 430 #define NI_NODEADDR_FLAG_TRUNCATE       0x1
 431 #define NI_NODEADDR_FLAG_ALL            0x2
 432 #define NI_NODEADDR_FLAG_COMPAT         0x4
 433 #define NI_NODEADDR_FLAG_LINKLOCAL      0x8
 434 #define NI_NODEADDR_FLAG_SITELOCAL      0x10
 435 #define NI_NODEADDR_FLAG_GLOBAL         0x20
 436 #define NI_NODEADDR_FLAG_ANYCAST        0x40 /* just experimental. not in spec */
 437 #elif BYTE_ORDER == LITTLE_ENDIAN
 438 #define NI_NODEADDR_FLAG_TRUNCATE       0x0100
 439 #define NI_NODEADDR_FLAG_ALL            0x0200
 440 #define NI_NODEADDR_FLAG_COMPAT         0x0400
 441 #define NI_NODEADDR_FLAG_LINKLOCAL      0x0800
 442 #define NI_NODEADDR_FLAG_SITELOCAL      0x1000
 443 #define NI_NODEADDR_FLAG_GLOBAL         0x2000
 444 #define NI_NODEADDR_FLAG_ANYCAST        0x4000 /* just experimental. not in spec */
 445 #endif
 446 #endif
 447
 448 struct ni_reply_fqdn {
 449         u_int32_t ni_fqdn_ttl;  /* TTL */
 450         u_int8_t ni_fqdn_namelen; /* length in octets of the FQDN */
 451         u_int8_t ni_fqdn_name[3]; /* XXX: alignment */
 452 } __packed;
 453
 454 /*
 455  * Router Renumbering. as router-renum-08.txt
 456  */
 457 struct icmp6_router_renum {     /* router renumbering header */
 458         struct icmp6_hdr        rr_hdr;
 459         u_int8_t        rr_segnum;
 460         u_int8_t        rr_flags;
 461         u_int16_t       rr_maxdelay;
 462         u_int32_t       rr_reserved;
 463 } __packed;
 464
 465 #define ICMP6_RR_FLAGS_TEST             0x80
 466 #define ICMP6_RR_FLAGS_REQRESULT        0x40
 467 #define ICMP6_RR_FLAGS_FORCEAPPLY       0x20
 468 #define ICMP6_RR_FLAGS_SPECSITE         0x10
 469 #define ICMP6_RR_FLAGS_PREVDONE         0x08
 470
 471 #define rr_type         rr_hdr.icmp6_type
 472 #define rr_code         rr_hdr.icmp6_code
 473 #define rr_cksum        rr_hdr.icmp6_cksum
 474 #define rr_seqnum       rr_hdr.icmp6_data32[0]
 475
 476 struct rr_pco_match {           /* match prefix part */
 477         u_int8_t        rpm_code;
 478         u_int8_t        rpm_len;
 479         u_int8_t        rpm_ordinal;
 480         u_int8_t        rpm_matchlen;
 481         u_int8_t        rpm_minlen;
 482         u_int8_t        rpm_maxlen;
 483         u_int16_t       rpm_reserved;
 484         struct  in6_addr        rpm_prefix;
 485 } __packed;
 486
 487 #define RPM_PCO_ADD             1
 488 #define RPM_PCO_CHANGE          2
 489 #define RPM_PCO_SETGLOBAL       3
 490 #define RPM_PCO_MAX             4
 491
 492 struct rr_pco_use {             /* use prefix part */
 493         u_int8_t        rpu_uselen;
 494         u_int8_t        rpu_keeplen;
 495         u_int8_t        rpu_ramask;
 496         u_int8_t        rpu_raflags;
 497         u_int32_t       rpu_vltime;
 498         u_int32_t       rpu_pltime;
 499         u_int32_t       rpu_flags;
 500         struct  in6_addr rpu_prefix;
 501 } __packed;
 502 #define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK  0x80
 503 #define ICMP6_RR_PCOUSE_RAFLAGS_AUTO    0x40
 504
 505 #if BYTE_ORDER == BIG_ENDIAN
 506 #define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME     0x80000000
 507 #define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME     0x40000000
 508 #elif BYTE_ORDER == LITTLE_ENDIAN
 509 #define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME     0x80
 510 #define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME     0x40
 511 #endif
 512
 513 struct rr_result {              /* router renumbering result message */
 514         u_int16_t       rrr_flags;
 515         u_int8_t        rrr_ordinal;
 516         u_int8_t        rrr_matchedlen;
 517         u_int32_t       rrr_ifid;
 518         struct  in6_addr rrr_prefix;
 519 } __packed;
 520 #if BYTE_ORDER == BIG_ENDIAN
 521 #define ICMP6_RR_RESULT_FLAGS_OOB               0x0002
 522 #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN         0x0001
 523 #elif BYTE_ORDER == LITTLE_ENDIAN
 524 #define ICMP6_RR_RESULT_FLAGS_OOB               0x0200
 525 #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN         0x0100
 526 #endif
 527
 528 /*
 529  * icmp6 filter structures.
 530  */
 531
 532 struct icmp6_filter {
 533         u_int32_t icmp6_filt[8];
 534 };
 535
 536 #define ICMP6_FILTER_SETPASSALL(filterp) \
 537         (void)memset(filterp, 0xff, sizeof(struct icmp6_filter))
 538 #define ICMP6_FILTER_SETBLOCKALL(filterp) \
 539         (void)memset(filterp, 0x00, sizeof(struct icmp6_filter))
 540 #define ICMP6_FILTER_SETPASS(type, filterp) \
 541         (((filterp)->icmp6_filt[(type) >> 5]) |= (1 << ((type) & 31)))
 542 #define ICMP6_FILTER_SETBLOCK(type, filterp) \
 543         (((filterp)->icmp6_filt[(type) >> 5]) &= ~(1 << ((type) & 31)))
 544 #define ICMP6_FILTER_WILLPASS(type, filterp) \
 545         ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) != 0)
 546 #define ICMP6_FILTER_WILLBLOCK(type, filterp) \
 547         ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) == 0)
 548
 549 /*
 550  * Variables related to this implementation
 551  * of the internet control message protocol version 6.
 552  */
 553
 554 /*
 555  * IPv6 ICMP statistics.
 556  * Each counter is an unsigned 64-bit value.
 557  */
 558 #define ICMP6_STAT_ERROR        0       /* # of calls to icmp6_error */
 559 #define ICMP6_STAT_CANTERROR    1       /* no error (old was icmp) */
 560 #define ICMP6_STAT_TOOFREQ      2       /* no error (rate limitation) */
 561 #define ICMP6_STAT_OUTHIST      3       /* # of output messages */
 562                 /* space for 256 counters */
 563 #define ICMP6_STAT_BADCODE      259     /* icmp6_code out of range */
 564 #define ICMP6_STAT_TOOSHORT     260     /* packet < sizeof(struct icmp6_hdr) */
 565 #define ICMP6_STAT_CHECKSUM     261     /* bad checksum */
 566 #define ICMP6_STAT_BADLEN       262     /* calculated bound mismatch */
 567         /*
 568          * number of responses; this member is inherited from the netinet code,
 569          * but for netinet6 code, it is already available in outhist[].
 570          */
 571 #define ICMP6_STAT_REFLECT      263
 572 #define ICMP6_STAT_INHIST       264     /* # of input messages */
 573                 /* space for 256 counters */
 574 #define ICMP6_STAT_ND_TOOMANYOPT 520    /* too many ND options */
 575 #define ICMP6_STAT_OUTERRHIST   521
 576                 /* space for 13 counters */
 577 #define ICMP6_STAT_PMTUCHG      534     /* path MTU changes */
 578 #define ICMP6_STAT_ND_BADOPT    535     /* bad ND options */
 579 #define ICMP6_STAT_BADNS        536     /* bad neighbor solicititation */
 580 #define ICMP6_STAT_BADNA        537     /* bad neighbor advertisement */
 581 #define ICMP6_STAT_BADRS        538     /* bad router solicitiation */
 582 #define ICMP6_STAT_BADRA        539     /* bad router advertisement */
 583 #define ICMP6_STAT_BADREDIRECT  540     /* bad redirect message */
 584 #define ICMP6_STAT_DROPPED_RAROUTE 541  /* discarded routes from router advertisement */
 585
 586 #define ICMP6_NSTATS            542
 587
 588 #define ICMP6_ERRSTAT_DST_UNREACH_NOROUTE       0
 589 #define ICMP6_ERRSTAT_DST_UNREACH_ADMIN         1
 590 #define ICMP6_ERRSTAT_DST_UNREACH_BEYONDSCOPE   2
 591 #define ICMP6_ERRSTAT_DST_UNREACH_ADDR          3
 592 #define ICMP6_ERRSTAT_DST_UNREACH_NOPORT        4
 593 #define ICMP6_ERRSTAT_PACKET_TOO_BIG            5
 594 #define ICMP6_ERRSTAT_TIME_EXCEED_TRANSIT       6
 595 #define ICMP6_ERRSTAT_TIME_EXCEED_REASSEMBLY    7
 596 #define ICMP6_ERRSTAT_PARAMPROB_HEADER          8
 597 #define ICMP6_ERRSTAT_PARAMPROB_NEXTHEADER      9
 598 #define ICMP6_ERRSTAT_PARAMPROB_OPTION          10
 599 #define ICMP6_ERRSTAT_REDIRECT                  11
 600 #define ICMP6_ERRSTAT_UNKNOWN                   12
 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 #if 0   /*obsoleted*/
 609 #define ICMPV6CTL_ERRRATELIMIT  5       /* ICMPv6 error rate limitation */
 610 #endif
 611 #define ICMPV6CTL_ND6_PRUNE     6
 612 #define ICMPV6CTL_ND6_DELAY     8
 613 #define ICMPV6CTL_ND6_UMAXTRIES 9
 614 #define ICMPV6CTL_ND6_MMAXTRIES         10
 615 #define ICMPV6CTL_ND6_USELOOPBACK       11
 616 /*#define ICMPV6CTL_ND6_PROXYALL        12      obsoleted, do not reuse here */
 617 #define ICMPV6CTL_NODEINFO      13
 618 #define ICMPV6CTL_ERRPPSLIMIT   14      /* ICMPv6 error pps limitation */
 619 #define ICMPV6CTL_ND6_MAXNUDHINT        15
 620 #define ICMPV6CTL_MTUDISC_HIWAT 16
 621 #define ICMPV6CTL_MTUDISC_LOWAT 17
 622 #define ICMPV6CTL_ND6_DEBUG     18
 623 #define ICMPV6CTL_ND6_DRLIST    19
 624 #define ICMPV6CTL_ND6_PRLIST    20
 625 #define ICMPV6CTL_ND6_MAXQLEN   24
 626 #define ICMPV6CTL_MAXID         25
 627
 628 #define ICMPV6CTL_NAMES { \
 629         { 0, 0 }, \
 630         { 0, 0 }, \
 631         { "rediraccept", CTLTYPE_INT }, \
 632         { "redirtimeout", CTLTYPE_INT }, \
 633         { 0, 0 }, \
 634         { 0, 0 }, \
 635         { "nd6_prune", CTLTYPE_INT }, \
 636         { 0, 0 }, \
 637         { "nd6_delay", CTLTYPE_INT }, \
 638         { "nd6_umaxtries", CTLTYPE_INT }, \
 639         { "nd6_mmaxtries", CTLTYPE_INT }, \
 640         { "nd6_useloopback", CTLTYPE_INT }, \
 641         { 0, 0 }, \
 642         { "nodeinfo", CTLTYPE_INT }, \
 643         { "errppslimit", CTLTYPE_INT }, \
 644         { "nd6_maxnudhint", CTLTYPE_INT }, \
 645         { "mtudisc_hiwat", CTLTYPE_INT }, \
 646         { "mtudisc_lowat", CTLTYPE_INT }, \
 647         { "nd6_debug", CTLTYPE_INT }, \
 648         { 0, 0 }, \
 649         { 0, 0 }, \
 650         { 0, 0 }, \
 651         { 0, 0 }, \
 652         { 0, 0 }, \
 653         { "nd6_maxqueuelen", CTLTYPE_INT }, \
 654 }
 655
 656 #ifdef _KERNEL
 657 struct  rtentry;
 658 struct  rttimer;
 659 struct  in6_multi;
 660
 661 void    icmp6_init(void);
 662 void    icmp6_paramerror(struct mbuf *, int);
 663 void    icmp6_error(struct mbuf *, int, int, int);
 664 void    icmp6_error2(struct mbuf *, int, int, int, struct ifnet *);
 665 int     icmp6_input(struct mbuf **, int *, int);
 666 void    icmp6_fasttimo(void);
 667 void    icmp6_reflect(struct mbuf *, size_t);
 668 void    icmp6_prepare(struct mbuf *);
 669 void    icmp6_redirect_input(struct mbuf *, int);
 670 void    icmp6_redirect_output(struct mbuf *, struct rtentry *);
 671 int     icmp6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
 672
 673 void    icmp6_statinc(u_int);
 674
 675 struct  ip6ctlparam;
 676 void    icmp6_mtudisc_update(struct ip6ctlparam *, int);
 677 void    icmp6_mtudisc_callback_register(void (*)(struct in6_addr *));
 678
 679 /* XXX: is this the right place for these macros? */
 680 #define icmp6_ifstat_inc(ifp, tag) \
 681 do {                                                            \
 682         if (ifp)                                                \
 683                 ((struct in6_ifextra *)((ifp)->if_afdata[AF_INET6]))->icmp6_ifstat->tag++; \
 684 } while (/*CONSTCOND*/ 0)
 685
 686 #define icmp6_ifoutstat_inc(ifp, type, code) \
 687 do { \
 688                 icmp6_ifstat_inc(ifp, ifs6_out_msg); \
 689                 switch(type) { \
 690                  case ICMP6_DST_UNREACH: \
 691                          icmp6_ifstat_inc(ifp, ifs6_out_dstunreach); \
 692                          if (code == ICMP6_DST_UNREACH_ADMIN) \
 693                                  icmp6_ifstat_inc(ifp, ifs6_out_adminprohib); \
 694                          break; \
 695                  case ICMP6_PACKET_TOO_BIG: \
 696                          icmp6_ifstat_inc(ifp, ifs6_out_pkttoobig); \
 697                          break; \
 698                  case ICMP6_TIME_EXCEEDED: \
 699                          icmp6_ifstat_inc(ifp, ifs6_out_timeexceed); \
 700                          break; \
 701                  case ICMP6_PARAM_PROB: \
 702                          icmp6_ifstat_inc(ifp, ifs6_out_paramprob); \
 703                          break; \
 704                  case ICMP6_ECHO_REQUEST: \
 705                          icmp6_ifstat_inc(ifp, ifs6_out_echo); \
 706                          break; \
 707                  case ICMP6_ECHO_REPLY: \
 708                          icmp6_ifstat_inc(ifp, ifs6_out_echoreply); \
 709                          break; \
 710                  case MLD_LISTENER_QUERY: \
 711                          icmp6_ifstat_inc(ifp, ifs6_out_mldquery); \
 712                          break; \
 713                  case MLD_LISTENER_REPORT: \
 714                          icmp6_ifstat_inc(ifp, ifs6_out_mldreport); \
 715                          break; \
 716                  case MLD_LISTENER_DONE: \
 717                          icmp6_ifstat_inc(ifp, ifs6_out_mlddone); \
 718                          break; \
 719                  case ND_ROUTER_SOLICIT: \
 720                          icmp6_ifstat_inc(ifp, ifs6_out_routersolicit); \
 721                          break; \
 722                  case ND_ROUTER_ADVERT: \
 723                          icmp6_ifstat_inc(ifp, ifs6_out_routeradvert); \
 724                          break; \
 725                  case ND_NEIGHBOR_SOLICIT: \
 726                          icmp6_ifstat_inc(ifp, ifs6_out_neighborsolicit); \
 727                          break; \
 728                  case ND_NEIGHBOR_ADVERT: \
 729                          icmp6_ifstat_inc(ifp, ifs6_out_neighboradvert); \
 730                          break; \
 731                  case ND_REDIRECT: \
 732                          icmp6_ifstat_inc(ifp, ifs6_out_redirect); \
 733                          break; \
 734                 } \
 735 } while (/*CONSTCOND*/ 0)
 736
 737 extern int      icmp6_rediraccept;      /* accept/process redirects */
 738 extern int      icmp6_redirtimeout;     /* cache time for redirect routes */
 739 #endif /* _KERNEL */
 740
 741 #ifdef ICMP6_STRINGS
 742 /* Info: http://www.iana.org/assignments/icmpv6-parameters */
 743
 744 static const char * const icmp6_type_err[] = {
 745         "reserved0", "unreach", "packet_too_big", "timxceed", "paramprob",
 746         NULL
 747 };
 748
 749 static const char * const icmp6_type_info[] = {
 750         "echo", "echoreply",
 751         "mcastlistenq", "mcastlistenrep", "mcastlistendone",
 752         "rtsol", "rtadv", "neighsol", "neighadv", "redirect",
 753         "routerrenum", "nodeinfoq", "nodeinfor", "invneighsol", "invneighrep",
 754         "mcastlistenrep2", "haad_req", "haad_rep",
 755         "mobile_psol", "mobile_padv", "cga_sol", "cga_adv",
 756         "experimental150", "mcast_rtadv", "mcast_rtsol", "mcast_rtterm",
 757         "fmipv6_msg", "rpl_control", NULL
 758 };
 759
 760 static const char * const icmp6_code_none[] = { "none", NULL };
 761
 762 static const char * const icmp6_code_unreach[] = {
 763         "noroute", "admin", "beyondscope", "addr", "port",
 764         "srcaddr_policy", "reject_route", "source_route_err", NULL
 765 };
 766
 767 static const char * const icmp6_code_timxceed[] = {
 768         "intrans", "reass", NULL
 769 };
 770
 771 static const char * const icmp6_code_paramprob[] = {
 772         "hdr_field", "nxthdr_type", "option", NULL
 773 };
 774
 775 /* not all informational icmps that have codes have a names array */
 776 #endif
 777
 778 #endif /* !_NETINET_ICMP6_H_ */