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   1 /*      $NetBSD: icmp6.h,v 1.13 2000/08/03 16:30:37 itojun Exp $        */
   2 /*      $KAME: icmp6.h,v 1.22 2000/08/03 15:25:16 jinmei Exp $  */
   3
   4 /*
   5  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the project nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 /*
  34  * Copyright (c) 1982, 1986, 1993
  35  *      The Regents of the University of California.  All rights reserved.
  36  *
  37  * Redistribution and use in source and binary forms, with or without
  38  * modification, are permitted provided that the following conditions
  39  * are met:
  40  * 1. Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  * 2. Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in the
  44  *    documentation and/or other materials provided with the distribution.
  45  * 3. All advertising materials mentioning features or use of this software
  46  *    must display the following acknowledgement:
  47  *      This product includes software developed by the University of
  48  *      California, Berkeley and its contributors.
  49  * 4. Neither the name of the University nor the names of its contributors
  50  *    may be used to endorse or promote products derived from this software
  51  *    without specific prior written permission.
  52  *
  53  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  54  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  55  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  56  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  57  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  58  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  59  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  60  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  61  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  62  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  63  * SUCH DAMAGE.
  64  *
  65  *      @(#)ip_icmp.h   8.1 (Berkeley) 6/10/93
  66  */
  67
  68 #ifndef _NETINET_ICMP6_H_
  69 #define _NETINET_ICMP6_H_
  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 };
  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 ICMP6_MEMBERSHIP_QUERY          130     /* group membership query */
  99 #define MLD6_LISTENER_QUERY             130     /* multicast listener query */
 100 #define ICMP6_MEMBERSHIP_REPORT         131     /* group membership report */
 101 #define MLD6_LISTENER_REPORT            131     /* multicast listener report */
 102 #define ICMP6_MEMBERSHIP_REDUCTION      132     /* group membership termination */
 103 #define MLD6_LISTENER_DONE              132     /* multicast listener done */
 104
 105 #define ND_ROUTER_SOLICIT               133     /* router solicitation */
 106 #define ND_ROUTER_ADVERT                134     /* router advertisment */
 107 #define ND_NEIGHBOR_SOLICIT             135     /* neighbor solicitation */
 108 #define ND_NEIGHBOR_ADVERT              136     /* neighbor advertisment */
 109 #define ND_REDIRECT                     137     /* redirect */
 110
 111 #define ICMP6_ROUTER_RENUMBERING        138     /* router renumbering */
 112
 113 #define ICMP6_WRUREQUEST                139     /* who are you request */
 114 #define ICMP6_WRUREPLY                  140     /* who are you reply */
 115 #define ICMP6_FQDN_QUERY                139     /* FQDN query */
 116 #define ICMP6_FQDN_REPLY                140     /* FQDN reply */
 117 #define ICMP6_NI_QUERY                  139     /* node information request */
 118 #define ICMP6_NI_REPLY                  140     /* node information reply */
 119
 120 /* The definitions below are experimental. TBA */
 121 #define MLD6_MTRACE_RESP                141     /* mtrace response(to sender) */
 122 #define MLD6_MTRACE                     142     /* mtrace messages */
 123
 124 #define ICMP6_MAXTYPE                   142
 125
 126 #define ICMP6_DST_UNREACH_NOROUTE       0       /* no route to destination */
 127 #define ICMP6_DST_UNREACH_ADMIN         1       /* administratively prohibited */
 128 #define ICMP6_DST_UNREACH_NOTNEIGHBOR   2       /* not a neighbor(obsolete) */
 129 #define ICMP6_DST_UNREACH_BEYONDSCOPE   2       /* beyond scope of source address */
 130 #define ICMP6_DST_UNREACH_ADDR          3       /* address unreachable */
 131 #define ICMP6_DST_UNREACH_NOPORT        4       /* port unreachable */
 132
 133 #define ICMP6_TIME_EXCEED_TRANSIT       0       /* ttl==0 in transit */
 134 #define ICMP6_TIME_EXCEED_REASSEMBLY    1       /* ttl==0 in reass */
 135
 136 #define ICMP6_PARAMPROB_HEADER          0       /* erroneous header field */
 137 #define ICMP6_PARAMPROB_NEXTHEADER      1       /* unrecognized next header */
 138 #define ICMP6_PARAMPROB_OPTION          2       /* unrecognized option */
 139
 140 #define ICMP6_INFOMSG_MASK              0x80    /* all informational messages */
 141
 142 #define ICMP6_NI_SUBJ_IPV6      0       /* Query Subject is an IPv6 address */
 143 #define ICMP6_NI_SUBJ_FQDN      1       /* Query Subject is a Domain name */
 144 #define ICMP6_NI_SUBJ_IPV4      2       /* Query Subject is an IPv4 address */
 145
 146 #define ICMP6_NI_SUCCESS        0       /* node information successful reply */
 147 #define ICMP6_NI_REFUSED        1       /* node information request is refused */
 148 #define ICMP6_NI_UNKNOWN        2       /* unknown Qtype */
 149
 150 #define ICMP6_ROUTER_RENUMBERING_COMMAND  0     /* rr command */
 151 #define ICMP6_ROUTER_RENUMBERING_RESULT   1     /* rr result */
 152 #define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET   255     /* rr seq num reset */
 153
 154 /* Used in kernel only */
 155 #define ND_REDIRECT_ONLINK      0       /* redirect to an on-link node */
 156 #define ND_REDIRECT_ROUTER      1       /* redirect to a better router */
 157
 158 /*
 159  * Multicast Listener Discovery
 160  */
 161 struct mld6_hdr {
 162         struct icmp6_hdr        mld6_hdr;
 163         struct in6_addr         mld6_addr; /* multicast address */
 164 };
 165
 166 #define mld6_type       mld6_hdr.icmp6_type
 167 #define mld6_code       mld6_hdr.icmp6_code
 168 #define mld6_cksum      mld6_hdr.icmp6_cksum
 169 #define mld6_maxdelay   mld6_hdr.icmp6_data16[0]
 170 #define mld6_reserved   mld6_hdr.icmp6_data16[1]
 171
 172 /*
 173  * Neighbor Discovery
 174  */
 175
 176 struct nd_router_solicit {      /* router solicitation */
 177         struct icmp6_hdr        nd_rs_hdr;
 178         /* could be followed by options */
 179 };
 180
 181 #define nd_rs_type      nd_rs_hdr.icmp6_type
 182 #define nd_rs_code      nd_rs_hdr.icmp6_code
 183 #define nd_rs_cksum     nd_rs_hdr.icmp6_cksum
 184 #define nd_rs_reserved  nd_rs_hdr.icmp6_data32[0]
 185
 186 struct nd_router_advert {       /* router advertisement */
 187         struct icmp6_hdr        nd_ra_hdr;
 188         u_int32_t               nd_ra_reachable;        /* reachable time */
 189         u_int32_t               nd_ra_retransmit;       /* retransmit timer */
 190         /* could be followed by options */
 191 };
 192
 193 #define nd_ra_type              nd_ra_hdr.icmp6_type
 194 #define nd_ra_code              nd_ra_hdr.icmp6_code
 195 #define nd_ra_cksum             nd_ra_hdr.icmp6_cksum
 196 #define nd_ra_curhoplimit       nd_ra_hdr.icmp6_data8[0]
 197 #define nd_ra_flags_reserved    nd_ra_hdr.icmp6_data8[1]
 198 #define ND_RA_FLAG_MANAGED      0x80
 199 #define ND_RA_FLAG_OTHER        0x40
 200 #define nd_ra_router_lifetime   nd_ra_hdr.icmp6_data16[1]
 201
 202 struct nd_neighbor_solicit {    /* neighbor solicitation */
 203         struct icmp6_hdr        nd_ns_hdr;
 204         struct in6_addr         nd_ns_target;   /*target address */
 205         /* could be followed by options */
 206 };
 207
 208 #define nd_ns_type              nd_ns_hdr.icmp6_type
 209 #define nd_ns_code              nd_ns_hdr.icmp6_code
 210 #define nd_ns_cksum             nd_ns_hdr.icmp6_cksum
 211 #define nd_ns_reserved          nd_ns_hdr.icmp6_data32[0]
 212
 213 struct nd_neighbor_advert {     /* neighbor advertisement */
 214         struct icmp6_hdr        nd_na_hdr;
 215         struct in6_addr         nd_na_target;   /* target address */
 216         /* could be followed by options */
 217 };
 218
 219 #define nd_na_type              nd_na_hdr.icmp6_type
 220 #define nd_na_code              nd_na_hdr.icmp6_code
 221 #define nd_na_cksum             nd_na_hdr.icmp6_cksum
 222 #define nd_na_flags_reserved    nd_na_hdr.icmp6_data32[0]
 223 /* netowkr endian */
 224 #define ND_NA_FLAG_ROUTER               ((u_int32_t)htonl(0x80000000))
 225 #define ND_NA_FLAG_SOLICITED            ((u_int32_t)htonl(0x40000000))
 226 #define ND_NA_FLAG_OVERRIDE             ((u_int32_t)htonl(0x20000000))
 227
 228 struct nd_redirect {            /* redirect */
 229         struct icmp6_hdr        nd_rd_hdr;
 230         struct in6_addr         nd_rd_target;   /* target address */
 231         struct in6_addr         nd_rd_dst;      /* destination address */
 232         /* could be followed by options */
 233 };
 234
 235 #define nd_rd_type              nd_rd_hdr.icmp6_type
 236 #define nd_rd_code              nd_rd_hdr.icmp6_code
 237 #define nd_rd_cksum             nd_rd_hdr.icmp6_cksum
 238 #define nd_rd_reserved          nd_rd_hdr.icmp6_data32[0]
 239
 240 struct nd_opt_hdr {             /* Neighbor discovery option header */
 241         u_int8_t        nd_opt_type;
 242         u_int8_t        nd_opt_len;
 243         /* followed by option specific data*/
 244 };
 245
 246 #define ND_OPT_SOURCE_LINKADDR          1
 247 #define ND_OPT_TARGET_LINKADDR          2
 248 #define ND_OPT_PREFIX_INFORMATION       3
 249 #define ND_OPT_REDIRECTED_HEADER        4
 250 #define ND_OPT_MTU                      5
 251 #define ND_OPT_ADVINT                   7
 252
 253 struct nd_opt_prefix_info {     /* prefix information */
 254         u_int8_t        nd_opt_pi_type;
 255         u_int8_t        nd_opt_pi_len;
 256         u_int8_t        nd_opt_pi_prefix_len;
 257         u_int8_t        nd_opt_pi_flags_reserved;
 258         u_int32_t       nd_opt_pi_valid_time;
 259         u_int32_t       nd_opt_pi_preferred_time;
 260         u_int32_t       nd_opt_pi_reserved2;
 261         struct in6_addr nd_opt_pi_prefix;
 262 };
 263
 264 #define ND_OPT_PI_FLAG_ONLINK           0x80
 265 #define ND_OPT_PI_FLAG_AUTO             0x40
 266 #define ND_OPT_PI_FLAG_ROUTER           0x20    /*2292bis*/
 267
 268 struct nd_opt_rd_hdr {         /* redirected header */
 269         u_int8_t        nd_opt_rh_type;
 270         u_int8_t        nd_opt_rh_len;
 271         u_int16_t       nd_opt_rh_reserved1;
 272         u_int32_t       nd_opt_rh_reserved2;
 273         /* followed by IP header and data */
 274 };
 275
 276 struct nd_opt_mtu {             /* MTU option */
 277         u_int8_t        nd_opt_mtu_type;
 278         u_int8_t        nd_opt_mtu_len;
 279         u_int16_t       nd_opt_mtu_reserved;
 280         u_int32_t       nd_opt_mtu_mtu;
 281 };
 282
 283 struct nd_opt_advint {          /* Advertisement interval option */
 284         u_int8_t        nd_opt_advint_type;
 285         u_int8_t        nd_opt_advint_len;
 286         u_int16_t       nd_opt_advint_reserved;
 287         u_int32_t       nd_opt_advint_advint;
 288 };
 289
 290 /*
 291  * icmp6 namelookup
 292  */
 293
 294 struct icmp6_namelookup {
 295         struct icmp6_hdr        icmp6_nl_hdr;
 296         u_int8_t        icmp6_nl_nonce[8];
 297         int32_t         icmp6_nl_ttl;
 298 #if 0
 299         u_int8_t        icmp6_nl_len;
 300         u_int8_t        icmp6_nl_name[3];
 301 #endif
 302         /* could be followed by options */
 303 };
 304
 305 /*
 306  * icmp6 node information
 307  */
 308 struct icmp6_nodeinfo {
 309         struct icmp6_hdr icmp6_ni_hdr;
 310         u_int8_t icmp6_ni_nonce[8];
 311         /* could be followed by reply data */
 312 };
 313
 314 #define ni_type         icmp6_ni_hdr.icmp6_type
 315 #define ni_code         icmp6_ni_hdr.icmp6_code
 316 #define ni_cksum        icmp6_ni_hdr.icmp6_cksum
 317 #define ni_qtype        icmp6_ni_hdr.icmp6_data16[0]
 318 #define ni_flags        icmp6_ni_hdr.icmp6_data16[1]
 319
 320 #define NI_QTYPE_NOOP           0 /* NOOP  */
 321 #define NI_QTYPE_SUPTYPES       1 /* Supported Qtypes */
 322 #define NI_QTYPE_FQDN           2 /* FQDN (draft 04) */
 323 #define NI_QTYPE_DNSNAME        2 /* DNS Name */
 324 #define NI_QTYPE_NODEADDR       3 /* Node Addresses */
 325 #define NI_QTYPE_IPV4ADDR       4 /* IPv4 Addresses */
 326
 327 /* network endian */
 328 #define NI_SUPTYPE_FLAG_COMPRESS        ((u_int16_t)htons(0x1))
 329 #define NI_FQDN_FLAG_VALIDTTL           ((u_int16_t)htons(0x1))
 330
 331 /* network endian */
 332 #define NI_NODEADDR_FLAG_TRUNCATE       ((u_int16_t)htons(0x1))
 333 #define NI_NODEADDR_FLAG_ALL            ((u_int16_t)htons(0x2))
 334 #define NI_NODEADDR_FLAG_COMPAT         ((u_int16_t)htons(0x4))
 335 #define NI_NODEADDR_FLAG_LINKLOCAL      ((u_int16_t)htons(0x8))
 336 #define NI_NODEADDR_FLAG_SITELOCAL      ((u_int16_t)htons(0x10))
 337 #define NI_NODEADDR_FLAG_GLOBAL         ((u_int16_t)htons(0x20))
 338 #define NI_NODEADDR_FLAG_ANYCAST        ((u_int16_t)htons(0x40)) /* just experimental. not in spec */
 339
 340 struct ni_reply_fqdn {
 341         u_int32_t ni_fqdn_ttl;  /* TTL */
 342         u_int8_t ni_fqdn_namelen; /* length in octets of the FQDN */
 343         u_int8_t ni_fqdn_name[3]; /* XXX: alignment */
 344 };
 345
 346 /*
 347  * Router Renumbering. as router-renum-08.txt
 348  */
 349 struct icmp6_router_renum {     /* router renumbering header */
 350         struct icmp6_hdr        rr_hdr;
 351         u_int8_t        rr_segnum;
 352         u_int8_t        rr_flags;
 353         u_int16_t       rr_maxdelay;
 354         u_int32_t       rr_reserved;
 355 };
 356 #define ICMP6_RR_FLAGS_TEST             0x80
 357 #define ICMP6_RR_FLAGS_REQRESULT        0x40
 358 #define ICMP6_RR_FLAGS_ALLIF            0x20
 359 #define ICMP6_RR_FLAGS_SPECSITE         0x10
 360 #define ICMP6_RR_FLAGS_PREVDONE         0x08
 361
 362 #define rr_type         rr_hdr.icmp6_type
 363 #define rr_code         rr_hdr.icmp6_code
 364 #define rr_cksum        rr_hdr.icmp6_cksum
 365 #define rr_seqnum       rr_hdr.icmp6_data32[0]
 366
 367 struct rr_pco_match {           /* match prefix part */
 368         u_int8_t        rpm_code;
 369         u_int8_t        rpm_len;
 370         u_int8_t        rpm_ordinal;
 371         u_int8_t        rpm_matchlen;
 372         u_int8_t        rpm_minlen;
 373         u_int8_t        rpm_maxlen;
 374         u_int16_t       rpm_reserved;
 375         struct  in6_addr        rpm_prefix;
 376 };
 377
 378 #define RPM_PCO_ADD             1
 379 #define RPM_PCO_CHANGE          2
 380 #define RPM_PCO_SETGLOBAL       3
 381 #define RPM_PCO_MAX             4
 382
 383 struct rr_pco_use {             /* use prefix part */
 384         u_int8_t        rpu_uselen;
 385         u_int8_t        rpu_keeplen;
 386         u_int8_t        rpu_ramask;
 387         u_int8_t        rpu_raflags;
 388         u_int32_t       rpu_vltime;
 389         u_int32_t       rpu_pltime;
 390         u_int32_t       rpu_flags;
 391         struct  in6_addr rpu_prefix;
 392 };
 393 #define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK  0x80
 394 #define ICMP6_RR_PCOUSE_RAFLAGS_AUTO    0x40
 395
 396 /* network endian */
 397 #define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME     ((u_int32_t)htonl(0x80000000))
 398 #define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME     ((u_int32_t)htonl(0x40000000))
 399
 400 struct rr_result {              /* router renumbering result message */
 401         u_int16_t       rrr_flags;
 402         u_int8_t        rrr_ordinal;
 403         u_int8_t        rrr_matchedlen;
 404         u_int32_t       rrr_ifid;
 405         struct  in6_addr rrr_prefix;
 406 };
 407 /* network endian */
 408 #define ICMP6_RR_RESULT_FLAGS_OOB               ((u_int16_t)htons(0x0002))
 409 #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN         ((u_int16_t)htons(0x0001))
 410
 411 #endif /* not _NETINET_ICMP6_H_ */