sys/netinet/icmp6.h

   1 /*      $NetBSD: icmp6.h,v 1.38 2008/04/15 03:57:04 thorpej 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
 102 /* RFC2292 decls */
 103 #define ICMP6_MEMBERSHIP_QUERY          130     /* group membership query */
 104 #define ICMP6_MEMBERSHIP_REPORT         131     /* group membership report */
 105 #define ICMP6_MEMBERSHIP_REDUCTION      132     /* group membership termination */
 106
 107 #ifndef _KERNEL
 108 /* the followings are for backward compatibility to old KAME apps. */
 109 #define MLD6_LISTENER_QUERY     MLD_LISTENER_QUERY
 110 #define MLD6_LISTENER_REPORT    MLD_LISTENER_REPORT
 111 #define MLD6_LISTENER_DONE      MLD_LISTENER_DONE
 112 #endif
 113
 114 #define ND_ROUTER_SOLICIT               133     /* router solicitation */
 115 #define ND_ROUTER_ADVERT                134     /* router advertisement */
 116 #define ND_NEIGHBOR_SOLICIT             135     /* neighbor solicitation */
 117 #define ND_NEIGHBOR_ADVERT              136     /* neighbor advertisement */
 118 #define ND_REDIRECT                     137     /* redirect */
 119
 120 #define ICMP6_ROUTER_RENUMBERING        138     /* router renumbering */
 121
 122 #define ICMP6_WRUREQUEST                139     /* who are you request */
 123 #define ICMP6_WRUREPLY                  140     /* who are you reply */
 124 #define ICMP6_FQDN_QUERY                139     /* FQDN query */
 125 #define ICMP6_FQDN_REPLY                140     /* FQDN reply */
 126 #define ICMP6_NI_QUERY                  139     /* node information request */
 127 #define ICMP6_NI_REPLY                  140     /* node information reply */
 128
 129 /* The definitions below are experimental. TBA */
 130 #define MLD_MTRACE_RESP                 200     /* mtrace response(to sender) */
 131 #define MLD_MTRACE                      201     /* mtrace messages */
 132
 133 #ifndef _KERNEL
 134 /* the followings are for backward compatibility to old KAME apps. */
 135 #define MLD6_MTRACE_RESP        MLD_MTRACE_RESP
 136 #define MLD6_MTRACE             MLD_MTRACE
 137 #endif
 138
 139 #define ICMP6_MAXTYPE                   201
 140
 141 #define ICMP6_DST_UNREACH_NOROUTE       0       /* no route to destination */
 142 #define ICMP6_DST_UNREACH_ADMIN         1       /* administratively prohibited */
 143 #define ICMP6_DST_UNREACH_NOTNEIGHBOR   2       /* not a neighbor(obsolete) */
 144 #define ICMP6_DST_UNREACH_BEYONDSCOPE   2       /* beyond scope of source address */
 145 #define ICMP6_DST_UNREACH_ADDR          3       /* address unreachable */
 146 #define ICMP6_DST_UNREACH_NOPORT        4       /* port unreachable */
 147
 148 #define ICMP6_TIME_EXCEED_TRANSIT       0       /* ttl==0 in transit */
 149 #define ICMP6_TIME_EXCEED_REASSEMBLY    1       /* ttl==0 in reass */
 150
 151 #define ICMP6_PARAMPROB_HEADER          0       /* erroneous header field */
 152 #define ICMP6_PARAMPROB_NEXTHEADER      1       /* unrecognized next header */
 153 #define ICMP6_PARAMPROB_OPTION          2       /* unrecognized option */
 154
 155 #define ICMP6_INFOMSG_MASK              0x80    /* all informational messages */
 156
 157 #define ICMP6_NI_SUBJ_IPV6      0       /* Query Subject is an IPv6 address */
 158 #define ICMP6_NI_SUBJ_FQDN      1       /* Query Subject is a Domain name */
 159 #define ICMP6_NI_SUBJ_IPV4      2       /* Query Subject is an IPv4 address */
 160
 161 #define ICMP6_NI_SUCCESS        0       /* node information successful reply */
 162 #define ICMP6_NI_REFUSED        1       /* node information request is refused */
 163 #define ICMP6_NI_UNKNOWN        2       /* unknown Qtype */
 164
 165 #define ICMP6_ROUTER_RENUMBERING_COMMAND  0     /* rr command */
 166 #define ICMP6_ROUTER_RENUMBERING_RESULT   1     /* rr result */
 167 #define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET   255     /* rr seq num reset */
 168
 169 /* Used in kernel only */
 170 #define ND_REDIRECT_ONLINK      0       /* redirect to an on-link node */
 171 #define ND_REDIRECT_ROUTER      1       /* redirect to a better router */
 172
 173 /*
 174  * Multicast Listener Discovery
 175  */
 176 struct mld_hdr {
 177         struct icmp6_hdr        mld_icmp6_hdr;
 178         struct in6_addr         mld_addr; /* multicast address */
 179 } __packed;
 180
 181 /* definitions to provide backward compatibility to old KAME applications */
 182 #ifndef _KERNEL
 183 #define mld6_hdr        mld_hdr
 184 #define mld6_type       mld_type
 185 #define mld6_code       mld_code
 186 #define mld6_cksum      mld_cksum
 187 #define mld6_maxdelay   mld_maxdelay
 188 #define mld6_reserved   mld_reserved
 189 #define mld6_addr       mld_addr
 190 #endif
 191
 192 /* shortcut macro definitions */
 193 #define mld_type        mld_icmp6_hdr.icmp6_type
 194 #define mld_code        mld_icmp6_hdr.icmp6_code
 195 #define mld_cksum       mld_icmp6_hdr.icmp6_cksum
 196 #define mld_maxdelay    mld_icmp6_hdr.icmp6_data16[0]
 197 #define mld_reserved    mld_icmp6_hdr.icmp6_data16[1]
 198
 199 #define MLD_MINLEN                      24
 200
 201 /*
 202  * Neighbor Discovery
 203  */
 204
 205 struct nd_router_solicit {      /* router solicitation */
 206         struct icmp6_hdr        nd_rs_hdr;
 207         /* could be followed by options */
 208 } __packed;
 209
 210 #define nd_rs_type      nd_rs_hdr.icmp6_type
 211 #define nd_rs_code      nd_rs_hdr.icmp6_code
 212 #define nd_rs_cksum     nd_rs_hdr.icmp6_cksum
 213 #define nd_rs_reserved  nd_rs_hdr.icmp6_data32[0]
 214
 215 struct nd_router_advert {       /* router advertisement */
 216         struct icmp6_hdr        nd_ra_hdr;
 217         u_int32_t               nd_ra_reachable;        /* reachable time */
 218         u_int32_t               nd_ra_retransmit;       /* retransmit timer */
 219         /* could be followed by options */
 220 } __packed;
 221
 222 #define nd_ra_type              nd_ra_hdr.icmp6_type
 223 #define nd_ra_code              nd_ra_hdr.icmp6_code
 224 #define nd_ra_cksum             nd_ra_hdr.icmp6_cksum
 225 #define nd_ra_curhoplimit       nd_ra_hdr.icmp6_data8[0]
 226 #define nd_ra_flags_reserved    nd_ra_hdr.icmp6_data8[1]
 227 #define ND_RA_FLAG_MANAGED      0x80
 228 #define ND_RA_FLAG_OTHER        0x40
 229 #define ND_RA_FLAG_HOME_AGENT   0x20
 230
 231 /*
 232  * Router preference values based on RFC4199.
 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 } __packed;
 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 } __packed;
 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 } __packed;
 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 } __packed;
 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 #define ND_OPT_RDNSS                    25
 300
 301 struct nd_opt_prefix_info {     /* prefix information */
 302         u_int8_t        nd_opt_pi_type;
 303         u_int8_t        nd_opt_pi_len;
 304         u_int8_t        nd_opt_pi_prefix_len;
 305         u_int8_t        nd_opt_pi_flags_reserved;
 306         u_int32_t       nd_opt_pi_valid_time;
 307         u_int32_t       nd_opt_pi_preferred_time;
 308         u_int32_t       nd_opt_pi_reserved2;
 309         struct in6_addr nd_opt_pi_prefix;
 310 } __packed;
 311
 312 #define ND_OPT_PI_FLAG_ONLINK           0x80
 313 #define ND_OPT_PI_FLAG_AUTO             0x40
 314
 315 struct nd_opt_rd_hdr {          /* redirected header */
 316         u_int8_t        nd_opt_rh_type;
 317         u_int8_t        nd_opt_rh_len;
 318         u_int16_t       nd_opt_rh_reserved1;
 319         u_int32_t       nd_opt_rh_reserved2;
 320         /* followed by IP header and data */
 321 } __packed;
 322
 323 struct nd_opt_mtu {             /* MTU option */
 324         u_int8_t        nd_opt_mtu_type;
 325         u_int8_t        nd_opt_mtu_len;
 326         u_int16_t       nd_opt_mtu_reserved;
 327         u_int32_t       nd_opt_mtu_mtu;
 328 } __packed;
 329
 330 struct nd_opt_rdnss {           /* RDNSS option RFC 5006 */
 331         u_int8_t        nd_opt_rdnss_type;
 332         u_int8_t        nd_opt_rdnss_len;
 333         u_int16_t       nd_opt_rdnss_reserved;
 334         u_int32_t       nd_opt_rdnss_lifetime;
 335         /* followed by list of IP prefixes */
 336 } __packed;
 337
 338 /*
 339  * icmp6 namelookup
 340  */
 341
 342 struct icmp6_namelookup {
 343         struct icmp6_hdr        icmp6_nl_hdr;
 344         u_int8_t        icmp6_nl_nonce[8];
 345         int32_t         icmp6_nl_ttl;
 346 #if 0
 347         u_int8_t        icmp6_nl_len;
 348         u_int8_t        icmp6_nl_name[3];
 349 #endif
 350         /* could be followed by options */
 351 } __packed;
 352
 353 /*
 354  * icmp6 node information
 355  */
 356 struct icmp6_nodeinfo {
 357         struct icmp6_hdr icmp6_ni_hdr;
 358         u_int8_t icmp6_ni_nonce[8];
 359         /* could be followed by reply data */
 360 } __packed;
 361
 362 #define ni_type         icmp6_ni_hdr.icmp6_type
 363 #define ni_code         icmp6_ni_hdr.icmp6_code
 364 #define ni_cksum        icmp6_ni_hdr.icmp6_cksum
 365 #define ni_qtype        icmp6_ni_hdr.icmp6_data16[0]
 366 #define ni_flags        icmp6_ni_hdr.icmp6_data16[1]
 367
 368 #define NI_QTYPE_NOOP           0 /* NOOP  */
 369 #define NI_QTYPE_SUPTYPES       1 /* Supported Qtypes */
 370 #define NI_QTYPE_FQDN           2 /* FQDN (draft 04) */
 371 #define NI_QTYPE_DNSNAME        2 /* DNS Name */
 372 #define NI_QTYPE_NODEADDR       3 /* Node Addresses */
 373 #define NI_QTYPE_IPV4ADDR       4 /* IPv4 Addresses */
 374
 375 #if BYTE_ORDER == BIG_ENDIAN
 376 #define NI_SUPTYPE_FLAG_COMPRESS        0x1
 377 #define NI_FQDN_FLAG_VALIDTTL           0x1
 378 #elif BYTE_ORDER == LITTLE_ENDIAN
 379 #define NI_SUPTYPE_FLAG_COMPRESS        0x0100
 380 #define NI_FQDN_FLAG_VALIDTTL           0x0100
 381 #endif
 382
 383 #ifdef NAME_LOOKUPS_04
 384 #if BYTE_ORDER == BIG_ENDIAN
 385 #define NI_NODEADDR_FLAG_LINKLOCAL      0x1
 386 #define NI_NODEADDR_FLAG_SITELOCAL      0x2
 387 #define NI_NODEADDR_FLAG_GLOBAL         0x4
 388 #define NI_NODEADDR_FLAG_ALL            0x8
 389 #define NI_NODEADDR_FLAG_TRUNCATE       0x10
 390 #define NI_NODEADDR_FLAG_ANYCAST        0x20 /* just experimental. not in spec */
 391 #elif BYTE_ORDER == LITTLE_ENDIAN
 392 #define NI_NODEADDR_FLAG_LINKLOCAL      0x0100
 393 #define NI_NODEADDR_FLAG_SITELOCAL      0x0200
 394 #define NI_NODEADDR_FLAG_GLOBAL         0x0400
 395 #define NI_NODEADDR_FLAG_ALL            0x0800
 396 #define NI_NODEADDR_FLAG_TRUNCATE       0x1000
 397 #define NI_NODEADDR_FLAG_ANYCAST        0x2000 /* just experimental. not in spec */
 398 #endif
 399 #else  /* draft-ietf-ipngwg-icmp-name-lookups-05 (and later?) */
 400 #if BYTE_ORDER == BIG_ENDIAN
 401 #define NI_NODEADDR_FLAG_TRUNCATE       0x1
 402 #define NI_NODEADDR_FLAG_ALL            0x2
 403 #define NI_NODEADDR_FLAG_COMPAT         0x4
 404 #define NI_NODEADDR_FLAG_LINKLOCAL      0x8
 405 #define NI_NODEADDR_FLAG_SITELOCAL      0x10
 406 #define NI_NODEADDR_FLAG_GLOBAL         0x20
 407 #define NI_NODEADDR_FLAG_ANYCAST        0x40 /* just experimental. not in spec */
 408 #elif BYTE_ORDER == LITTLE_ENDIAN
 409 #define NI_NODEADDR_FLAG_TRUNCATE       0x0100
 410 #define NI_NODEADDR_FLAG_ALL            0x0200
 411 #define NI_NODEADDR_FLAG_COMPAT         0x0400
 412 #define NI_NODEADDR_FLAG_LINKLOCAL      0x0800
 413 #define NI_NODEADDR_FLAG_SITELOCAL      0x1000
 414 #define NI_NODEADDR_FLAG_GLOBAL         0x2000
 415 #define NI_NODEADDR_FLAG_ANYCAST        0x4000 /* just experimental. not in spec */
 416 #endif
 417 #endif
 418
 419 struct ni_reply_fqdn {
 420         u_int32_t ni_fqdn_ttl;  /* TTL */
 421         u_int8_t ni_fqdn_namelen; /* length in octets of the FQDN */
 422         u_int8_t ni_fqdn_name[3]; /* XXX: alignment */
 423 } __packed;
 424
 425 /*
 426  * Router Renumbering. as router-renum-08.txt
 427  */
 428 struct icmp6_router_renum {     /* router renumbering header */
 429         struct icmp6_hdr        rr_hdr;
 430         u_int8_t        rr_segnum;
 431         u_int8_t        rr_flags;
 432         u_int16_t       rr_maxdelay;
 433         u_int32_t       rr_reserved;
 434 } __packed;
 435
 436 #define ICMP6_RR_FLAGS_TEST             0x80
 437 #define ICMP6_RR_FLAGS_REQRESULT        0x40
 438 #define ICMP6_RR_FLAGS_FORCEAPPLY       0x20
 439 #define ICMP6_RR_FLAGS_SPECSITE         0x10
 440 #define ICMP6_RR_FLAGS_PREVDONE         0x08
 441
 442 #define rr_type         rr_hdr.icmp6_type
 443 #define rr_code         rr_hdr.icmp6_code
 444 #define rr_cksum        rr_hdr.icmp6_cksum
 445 #define rr_seqnum       rr_hdr.icmp6_data32[0]
 446
 447 struct rr_pco_match {           /* match prefix part */
 448         u_int8_t        rpm_code;
 449         u_int8_t        rpm_len;
 450         u_int8_t        rpm_ordinal;
 451         u_int8_t        rpm_matchlen;
 452         u_int8_t        rpm_minlen;
 453         u_int8_t        rpm_maxlen;
 454         u_int16_t       rpm_reserved;
 455         struct  in6_addr        rpm_prefix;
 456 } __packed;
 457
 458 #define RPM_PCO_ADD             1
 459 #define RPM_PCO_CHANGE          2
 460 #define RPM_PCO_SETGLOBAL       3
 461 #define RPM_PCO_MAX             4
 462
 463 struct rr_pco_use {             /* use prefix part */
 464         u_int8_t        rpu_uselen;
 465         u_int8_t        rpu_keeplen;
 466         u_int8_t        rpu_ramask;
 467         u_int8_t        rpu_raflags;
 468         u_int32_t       rpu_vltime;
 469         u_int32_t       rpu_pltime;
 470         u_int32_t       rpu_flags;
 471         struct  in6_addr rpu_prefix;
 472 } __packed;
 473 #define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK  0x80
 474 #define ICMP6_RR_PCOUSE_RAFLAGS_AUTO    0x40
 475
 476 #if BYTE_ORDER == BIG_ENDIAN
 477 #define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME     0x80000000
 478 #define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME     0x40000000
 479 #elif BYTE_ORDER == LITTLE_ENDIAN
 480 #define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME     0x80
 481 #define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME     0x40
 482 #endif
 483
 484 struct rr_result {              /* router renumbering result message */
 485         u_int16_t       rrr_flags;
 486         u_int8_t        rrr_ordinal;
 487         u_int8_t        rrr_matchedlen;
 488         u_int32_t       rrr_ifid;
 489         struct  in6_addr rrr_prefix;
 490 } __packed;
 491 #if BYTE_ORDER == BIG_ENDIAN
 492 #define ICMP6_RR_RESULT_FLAGS_OOB               0x0002
 493 #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN         0x0001
 494 #elif BYTE_ORDER == LITTLE_ENDIAN
 495 #define ICMP6_RR_RESULT_FLAGS_OOB               0x0200
 496 #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN         0x0100
 497 #endif
 498
 499 /*
 500  * icmp6 filter structures.
 501  */
 502
 503 struct icmp6_filter {
 504         u_int32_t icmp6_filt[8];
 505 };
 506
 507 #define ICMP6_FILTER_SETPASSALL(filterp) \
 508         (void)memset(filterp, 0xff, sizeof(struct icmp6_filter))
 509 #define ICMP6_FILTER_SETBLOCKALL(filterp) \
 510         (void)memset(filterp, 0x00, sizeof(struct icmp6_filter))
 511 #define ICMP6_FILTER_SETPASS(type, filterp) \
 512         (((filterp)->icmp6_filt[(type) >> 5]) |= (1 << ((type) & 31)))
 513 #define ICMP6_FILTER_SETBLOCK(type, filterp) \
 514         (((filterp)->icmp6_filt[(type) >> 5]) &= ~(1 << ((type) & 31)))
 515 #define ICMP6_FILTER_WILLPASS(type, filterp) \
 516         ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) != 0)
 517 #define ICMP6_FILTER_WILLBLOCK(type, filterp) \
 518         ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) == 0)
 519
 520 /*
 521  * Variables related to this implementation
 522  * of the internet control message protocol version 6.
 523  */
 524
 525 /*
 526  * IPv6 ICMP statistics.
 527  * Each counter is an unsigned 64-bit value.
 528  */
 529 #define ICMP6_STAT_ERROR        0       /* # of calls to icmp6_error */
 530 #define ICMP6_STAT_CANTERROR    1       /* no error (old was icmp) */
 531 #define ICMP6_STAT_TOOFREQ      2       /* no error (rate limitation) */
 532 #define ICMP6_STAT_OUTHIST      3       /* # of output messages */
 533                 /* space for 256 counters */
 534 #define ICMP6_STAT_BADCODE      259     /* icmp6_code out of range */
 535 #define ICMP6_STAT_TOOSHORT     260     /* packet < sizeof(struct icmp6_hdr) */
 536 #define ICMP6_STAT_CHECKSUM     261     /* bad checksum */
 537 #define ICMP6_STAT_BADLEN       262     /* calculated bound mismatch */
 538         /*
 539          * number of responses; this member is inherited from the netinet code,
 540          * but for netinet6 code, it is already available in outhist[].
 541          */
 542 #define ICMP6_STAT_REFLECT      263
 543 #define ICMP6_STAT_INHIST       264     /* # of input messages */
 544                 /* space for 256 counters */
 545 #define ICMP6_STAT_ND_TOOMANYOPT 520    /* too many ND options */
 546 #define ICMP6_STAT_OUTERRHIST   521
 547                 /* space for 13 counters */
 548 #define ICMP6_STAT_PMTUCHG      534     /* path MTU changes */
 549 #define ICMP6_STAT_ND_BADOPT    535     /* bad ND options */
 550 #define ICMP6_STAT_BADNS        536     /* bad neighbor solicititation */
 551 #define ICMP6_STAT_BADNA        537     /* bad neighbor advertisement */
 552 #define ICMP6_STAT_BADRS        538     /* bad router solicitiation */
 553 #define ICMP6_STAT_BADRA        539     /* bad router advertisement */
 554 #define ICMP6_STAT_BADREDIRECT  540     /* bad redirect message */
 555
 556 #define ICMP6_NSTATS            541
 557
 558 #define ICMP6_ERRSTAT_DST_UNREACH_NOROUTE       0
 559 #define ICMP6_ERRSTAT_DST_UNREACH_ADMIN         1
 560 #define ICMP6_ERRSTAT_DST_UNREACH_BEYONDSCOPE   2
 561 #define ICMP6_ERRSTAT_DST_UNREACH_ADDR          3
 562 #define ICMP6_ERRSTAT_DST_UNREACH_NOPORT        4
 563 #define ICMP6_ERRSTAT_PACKET_TOO_BIG            5
 564 #define ICMP6_ERRSTAT_TIME_EXCEED_TRANSIT       6
 565 #define ICMP6_ERRSTAT_TIME_EXCEED_REASSEMBLY    7
 566 #define ICMP6_ERRSTAT_PARAMPROB_HEADER          8
 567 #define ICMP6_ERRSTAT_PARAMPROB_NEXTHEADER      9
 568 #define ICMP6_ERRSTAT_PARAMPROB_OPTION          10
 569 #define ICMP6_ERRSTAT_REDIRECT                  11
 570 #define ICMP6_ERRSTAT_UNKNOWN                   12
 571
 572 /*
 573  * Names for ICMP sysctl objects
 574  */
 575 #define ICMPV6CTL_STATS         1
 576 #define ICMPV6CTL_REDIRACCEPT   2       /* accept/process redirects */
 577 #define ICMPV6CTL_REDIRTIMEOUT  3       /* redirect cache time */
 578 #if 0   /*obsoleted*/
 579 #define ICMPV6CTL_ERRRATELIMIT  5       /* ICMPv6 error rate limitation */
 580 #endif
 581 #define ICMPV6CTL_ND6_PRUNE     6
 582 #define ICMPV6CTL_ND6_DELAY     8
 583 #define ICMPV6CTL_ND6_UMAXTRIES 9
 584 #define ICMPV6CTL_ND6_MMAXTRIES         10
 585 #define ICMPV6CTL_ND6_USELOOPBACK       11
 586 /*#define ICMPV6CTL_ND6_PROXYALL        12      obsoleted, do not reuse here */
 587 #define ICMPV6CTL_NODEINFO      13
 588 #define ICMPV6CTL_ERRPPSLIMIT   14      /* ICMPv6 error pps limitation */
 589 #define ICMPV6CTL_ND6_MAXNUDHINT        15
 590 #define ICMPV6CTL_MTUDISC_HIWAT 16
 591 #define ICMPV6CTL_MTUDISC_LOWAT 17
 592 #define ICMPV6CTL_ND6_DEBUG     18
 593 #define ICMPV6CTL_ND6_DRLIST    19
 594 #define ICMPV6CTL_ND6_PRLIST    20
 595 #define ICMPV6CTL_ND6_MAXQLEN   24
 596 #define ICMPV6CTL_MAXID         25
 597
 598 #define ICMPV6CTL_NAMES { \
 599         { 0, 0 }, \
 600         { 0, 0 }, \
 601         { "rediraccept", CTLTYPE_INT }, \
 602         { "redirtimeout", CTLTYPE_INT }, \
 603         { 0, 0 }, \
 604         { 0, 0 }, \
 605         { "nd6_prune", CTLTYPE_INT }, \
 606         { 0, 0 }, \
 607         { "nd6_delay", CTLTYPE_INT }, \
 608         { "nd6_umaxtries", CTLTYPE_INT }, \
 609         { "nd6_mmaxtries", CTLTYPE_INT }, \
 610         { "nd6_useloopback", CTLTYPE_INT }, \
 611         { 0, 0 }, \
 612         { "nodeinfo", CTLTYPE_INT }, \
 613         { "errppslimit", CTLTYPE_INT }, \
 614         { "nd6_maxnudhint", CTLTYPE_INT }, \
 615         { "mtudisc_hiwat", CTLTYPE_INT }, \
 616         { "mtudisc_lowat", CTLTYPE_INT }, \
 617         { "nd6_debug", CTLTYPE_INT }, \
 618         { 0, 0 }, \
 619         { 0, 0 }, \
 620         { 0, 0 }, \
 621         { 0, 0 }, \
 622         { 0, 0 }, \
 623         { "nd6_maxqueuelen", CTLTYPE_INT }, \
 624 }
 625
 626 #define RTF_PROBEMTU    RTF_PROTO1
 627
 628 #ifdef _KERNEL
 629 struct  rtentry;
 630 struct  rttimer;
 631 struct  in6_multi;
 632
 633 void    icmp6_init(void);
 634 void    icmp6_paramerror(struct mbuf *, int);
 635 void    icmp6_error(struct mbuf *, int, int, int);
 636 void    icmp6_error2(struct mbuf *, int, int, int, struct ifnet *);
 637 int     icmp6_input(struct mbuf **, int *, int);
 638 void    icmp6_fasttimo(void);
 639 void    icmp6_reflect(struct mbuf *, size_t);
 640 void    icmp6_prepare(struct mbuf *);
 641 void    icmp6_redirect_input(struct mbuf *, int);
 642 void    icmp6_redirect_output(struct mbuf *, struct rtentry *);
 643 int     icmp6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
 644
 645 void    icmp6_statinc(u_int);
 646
 647 struct  ip6ctlparam;
 648 void    icmp6_mtudisc_update(struct ip6ctlparam *, int);
 649 void    icmp6_mtudisc_callback_register(void (*)(struct in6_addr *));
 650
 651 /* XXX: is this the right place for these macros? */
 652 #define icmp6_ifstat_inc(ifp, tag) \
 653 do {                                                            \
 654         if (ifp)                                                \
 655                 ((struct in6_ifextra *)((ifp)->if_afdata[AF_INET6]))->icmp6_ifstat->tag++; \
 656 } while (/*CONSTCOND*/ 0)
 657
 658 #define icmp6_ifoutstat_inc(ifp, type, code) \
 659 do { \
 660                 icmp6_ifstat_inc(ifp, ifs6_out_msg); \
 661                 switch(type) { \
 662                  case ICMP6_DST_UNREACH: \
 663                          icmp6_ifstat_inc(ifp, ifs6_out_dstunreach); \
 664                          if (code == ICMP6_DST_UNREACH_ADMIN) \
 665                                  icmp6_ifstat_inc(ifp, ifs6_out_adminprohib); \
 666                          break; \
 667                  case ICMP6_PACKET_TOO_BIG: \
 668                          icmp6_ifstat_inc(ifp, ifs6_out_pkttoobig); \
 669                          break; \
 670                  case ICMP6_TIME_EXCEEDED: \
 671                          icmp6_ifstat_inc(ifp, ifs6_out_timeexceed); \
 672                          break; \
 673                  case ICMP6_PARAM_PROB: \
 674                          icmp6_ifstat_inc(ifp, ifs6_out_paramprob); \
 675                          break; \
 676                  case ICMP6_ECHO_REQUEST: \
 677                          icmp6_ifstat_inc(ifp, ifs6_out_echo); \
 678                          break; \
 679                  case ICMP6_ECHO_REPLY: \
 680                          icmp6_ifstat_inc(ifp, ifs6_out_echoreply); \
 681                          break; \
 682                  case MLD_LISTENER_QUERY: \
 683                          icmp6_ifstat_inc(ifp, ifs6_out_mldquery); \
 684                          break; \
 685                  case MLD_LISTENER_REPORT: \
 686                          icmp6_ifstat_inc(ifp, ifs6_out_mldreport); \
 687                          break; \
 688                  case MLD_LISTENER_DONE: \
 689                          icmp6_ifstat_inc(ifp, ifs6_out_mlddone); \
 690                          break; \
 691                  case ND_ROUTER_SOLICIT: \
 692                          icmp6_ifstat_inc(ifp, ifs6_out_routersolicit); \
 693                          break; \
 694                  case ND_ROUTER_ADVERT: \
 695                          icmp6_ifstat_inc(ifp, ifs6_out_routeradvert); \
 696                          break; \
 697                  case ND_NEIGHBOR_SOLICIT: \
 698                          icmp6_ifstat_inc(ifp, ifs6_out_neighborsolicit); \
 699                          break; \
 700                  case ND_NEIGHBOR_ADVERT: \
 701                          icmp6_ifstat_inc(ifp, ifs6_out_neighboradvert); \
 702                          break; \
 703                  case ND_REDIRECT: \
 704                          icmp6_ifstat_inc(ifp, ifs6_out_redirect); \
 705                          break; \
 706                 } \
 707 } while (/*CONSTCOND*/ 0)
 708
 709 extern int      icmp6_rediraccept;      /* accept/process redirects */
 710 extern int      icmp6_redirtimeout;     /* cache time for redirect routes */
 711 #endif /* _KERNEL */
 712
 713 #endif /* !_NETINET_ICMP6_H_ */