The Tcpdump Group git mirrors - tcpdump/blob - icmp6.h

   1 /* @(#) $Header: /tcpdump/master/tcpdump/icmp6.h,v 1.10 2001-06-01 22:59:45 itojun Exp $ (LBL) */
   2 /*      $NetBSD: icmp6.h,v 1.13 2000/08/03 16:30:37 itojun Exp $        */
   3 /*      $KAME: icmp6.h,v 1.22 2000/08/03 15:25:16 jinmei Exp $  */
   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. All advertising materials mentioning features or use of this software
  47  *    must display the following acknowledgement:
  48  *      This product includes software developed by the University of
  49  *      California, Berkeley and its contributors.
  50  * 4. Neither the name of the University nor the names of its contributors
  51  *    may be used to endorse or promote products derived from this software
  52  *    without specific prior written permission.
  53  *
  54  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  55  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  56  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  57  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  58  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  59  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  60  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  61  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  62  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  63  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  64  * SUCH DAMAGE.
  65  *
  66  *      @(#)ip_icmp.h   8.1 (Berkeley) 6/10/93
  67  */
  68
  69 #ifndef _NETINET_ICMP6_H_
  70 #define _NETINET_ICMP6_H_
  71
  72 struct icmp6_hdr {
  73         u_int8_t        icmp6_type;     /* type field */
  74         u_int8_t        icmp6_code;     /* code field */
  75         u_int16_t       icmp6_cksum;    /* checksum field */
  76         union {
  77                 u_int32_t       icmp6_un_data32[1]; /* type-specific field */
  78                 u_int16_t       icmp6_un_data16[2]; /* type-specific field */
  79                 u_int8_t        icmp6_un_data8[4];  /* type-specific field */
  80         } icmp6_dataun;
  81 };
  82
  83 #define icmp6_data32    icmp6_dataun.icmp6_un_data32
  84 #define icmp6_data16    icmp6_dataun.icmp6_un_data16
  85 #define icmp6_data8     icmp6_dataun.icmp6_un_data8
  86 #define icmp6_pptr      icmp6_data32[0]         /* parameter prob */
  87 #define icmp6_mtu       icmp6_data32[0]         /* packet too big */
  88 #define icmp6_id        icmp6_data16[0]         /* echo request/reply */
  89 #define icmp6_seq       icmp6_data16[1]         /* echo request/reply */
  90 #define icmp6_maxdelay  icmp6_data16[0]         /* mcast group membership */
  91
  92 #define ICMP6_DST_UNREACH               1       /* dest unreachable, codes: */
  93 #define ICMP6_PACKET_TOO_BIG            2       /* packet too big */
  94 #define ICMP6_TIME_EXCEEDED             3       /* time exceeded, code: */
  95 #define ICMP6_PARAM_PROB                4       /* ip6 header bad */
  96
  97 #define ICMP6_ECHO_REQUEST              128     /* echo service */
  98 #define ICMP6_ECHO_REPLY                129     /* echo reply */
  99 #define ICMP6_MEMBERSHIP_QUERY          130     /* group membership query */
 100 #define MLD6_LISTENER_QUERY             130     /* multicast listener query */
 101 #define ICMP6_MEMBERSHIP_REPORT         131     /* group membership report */
 102 #define MLD6_LISTENER_REPORT            131     /* multicast listener report */
 103 #define ICMP6_MEMBERSHIP_REDUCTION      132     /* group membership termination */
 104 #define MLD6_LISTENER_DONE              132     /* multicast listener done */
 105
 106 #define ND_ROUTER_SOLICIT               133     /* router solicitation */
 107 #define ND_ROUTER_ADVERT                134     /* router advertisment */
 108 #define ND_NEIGHBOR_SOLICIT             135     /* neighbor solicitation */
 109 #define ND_NEIGHBOR_ADVERT              136     /* neighbor advertisment */
 110 #define ND_REDIRECT                     137     /* redirect */
 111
 112 #define ICMP6_ROUTER_RENUMBERING        138     /* router renumbering */
 113
 114 #define ICMP6_WRUREQUEST                139     /* who are you request */
 115 #define ICMP6_WRUREPLY                  140     /* who are you reply */
 116 #define ICMP6_FQDN_QUERY                139     /* FQDN query */
 117 #define ICMP6_FQDN_REPLY                140     /* FQDN reply */
 118 #define ICMP6_NI_QUERY                  139     /* node information request */
 119 #define ICMP6_NI_REPLY                  140     /* node information reply */
 120
 121 /* The definitions below are experimental. TBA */
 122 #define MLD6_MTRACE_RESP                141     /* mtrace response(to sender) */
 123 #define MLD6_MTRACE                     142     /* mtrace messages */
 124
 125 #define ICMP6_MAXTYPE                   142
 126
 127 #define ICMP6_DST_UNREACH_NOROUTE       0       /* no route to destination */
 128 #define ICMP6_DST_UNREACH_ADMIN         1       /* administratively prohibited */
 129 #define ICMP6_DST_UNREACH_NOTNEIGHBOR   2       /* not a neighbor(obsolete) */
 130 #define ICMP6_DST_UNREACH_BEYONDSCOPE   2       /* beyond scope of source address */
 131 #define ICMP6_DST_UNREACH_ADDR          3       /* address unreachable */
 132 #define ICMP6_DST_UNREACH_NOPORT        4       /* port unreachable */
 133
 134 #define ICMP6_TIME_EXCEED_TRANSIT       0       /* ttl==0 in transit */
 135 #define ICMP6_TIME_EXCEED_REASSEMBLY    1       /* ttl==0 in reass */
 136
 137 #define ICMP6_PARAMPROB_HEADER          0       /* erroneous header field */
 138 #define ICMP6_PARAMPROB_NEXTHEADER      1       /* unrecognized next header */
 139 #define ICMP6_PARAMPROB_OPTION          2       /* unrecognized option */
 140
 141 #define ICMP6_INFOMSG_MASK              0x80    /* all informational messages */
 142
 143 #define ICMP6_NI_SUBJ_IPV6      0       /* Query Subject is an IPv6 address */
 144 #define ICMP6_NI_SUBJ_FQDN      1       /* Query Subject is a Domain name */
 145 #define ICMP6_NI_SUBJ_IPV4      2       /* Query Subject is an IPv4 address */
 146
 147 #define ICMP6_NI_SUCCESS        0       /* node information successful reply */
 148 #define ICMP6_NI_REFUSED        1       /* node information request is refused */
 149 #define ICMP6_NI_UNKNOWN        2       /* unknown Qtype */
 150
 151 #define ICMP6_ROUTER_RENUMBERING_COMMAND  0     /* rr command */
 152 #define ICMP6_ROUTER_RENUMBERING_RESULT   1     /* rr result */
 153 #define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET   255     /* rr seq num reset */
 154
 155 /* Used in kernel only */
 156 #define ND_REDIRECT_ONLINK      0       /* redirect to an on-link node */
 157 #define ND_REDIRECT_ROUTER      1       /* redirect to a better router */
 158
 159 /*
 160  * Multicast Listener Discovery
 161  */
 162 struct mld6_hdr {
 163         struct icmp6_hdr        mld6_hdr;
 164         struct in6_addr         mld6_addr; /* multicast address */
 165 };
 166
 167 #define mld6_type       mld6_hdr.icmp6_type
 168 #define mld6_code       mld6_hdr.icmp6_code
 169 #define mld6_cksum      mld6_hdr.icmp6_cksum
 170 #define mld6_maxdelay   mld6_hdr.icmp6_data16[0]
 171 #define mld6_reserved   mld6_hdr.icmp6_data16[1]
 172
 173 /*
 174  * Neighbor Discovery
 175  */
 176
 177 struct nd_router_solicit {      /* router solicitation */
 178         struct icmp6_hdr        nd_rs_hdr;
 179         /* could be followed by options */
 180 };
 181
 182 #define nd_rs_type      nd_rs_hdr.icmp6_type
 183 #define nd_rs_code      nd_rs_hdr.icmp6_code
 184 #define nd_rs_cksum     nd_rs_hdr.icmp6_cksum
 185 #define nd_rs_reserved  nd_rs_hdr.icmp6_data32[0]
 186
 187 struct nd_router_advert {       /* router advertisement */
 188         struct icmp6_hdr        nd_ra_hdr;
 189         u_int32_t               nd_ra_reachable;        /* reachable time */
 190         u_int32_t               nd_ra_retransmit;       /* retransmit timer */
 191         /* could be followed by options */
 192 };
 193
 194 #define nd_ra_type              nd_ra_hdr.icmp6_type
 195 #define nd_ra_code              nd_ra_hdr.icmp6_code
 196 #define nd_ra_cksum             nd_ra_hdr.icmp6_cksum
 197 #define nd_ra_curhoplimit       nd_ra_hdr.icmp6_data8[0]
 198 #define nd_ra_flags_reserved    nd_ra_hdr.icmp6_data8[1]
 199 #define ND_RA_FLAG_MANAGED      0x80
 200 #define ND_RA_FLAG_OTHER        0x40
 201 #define ND_RA_FLAG_HOME_AGENT   0x20
 202 #define nd_ra_router_lifetime   nd_ra_hdr.icmp6_data16[1]
 203
 204 struct nd_neighbor_solicit {    /* neighbor solicitation */
 205         struct icmp6_hdr        nd_ns_hdr;
 206         struct in6_addr         nd_ns_target;   /*target address */
 207         /* could be followed by options */
 208 };
 209
 210 #define nd_ns_type              nd_ns_hdr.icmp6_type
 211 #define nd_ns_code              nd_ns_hdr.icmp6_code
 212 #define nd_ns_cksum             nd_ns_hdr.icmp6_cksum
 213 #define nd_ns_reserved          nd_ns_hdr.icmp6_data32[0]
 214
 215 struct nd_neighbor_advert {     /* neighbor advertisement */
 216         struct icmp6_hdr        nd_na_hdr;
 217         struct in6_addr         nd_na_target;   /* target address */
 218         /* could be followed by options */
 219 };
 220
 221 #define nd_na_type              nd_na_hdr.icmp6_type
 222 #define nd_na_code              nd_na_hdr.icmp6_code
 223 #define nd_na_cksum             nd_na_hdr.icmp6_cksum
 224 #define nd_na_flags_reserved    nd_na_hdr.icmp6_data32[0]
 225 /* netowkr endian */
 226 #define ND_NA_FLAG_ROUTER               ((u_int32_t)htonl(0x80000000))
 227 #define ND_NA_FLAG_SOLICITED            ((u_int32_t)htonl(0x40000000))
 228 #define ND_NA_FLAG_OVERRIDE             ((u_int32_t)htonl(0x20000000))
 229
 230 struct nd_redirect {            /* redirect */
 231         struct icmp6_hdr        nd_rd_hdr;
 232         struct in6_addr         nd_rd_target;   /* target address */
 233         struct in6_addr         nd_rd_dst;      /* destination address */
 234         /* could be followed by options */
 235 };
 236
 237 #define nd_rd_type              nd_rd_hdr.icmp6_type
 238 #define nd_rd_code              nd_rd_hdr.icmp6_code
 239 #define nd_rd_cksum             nd_rd_hdr.icmp6_cksum
 240 #define nd_rd_reserved          nd_rd_hdr.icmp6_data32[0]
 241
 242 struct nd_opt_hdr {             /* Neighbor discovery option header */
 243         u_int8_t        nd_opt_type;
 244         u_int8_t        nd_opt_len;
 245         /* followed by option specific data*/
 246 };
 247
 248 #define ND_OPT_SOURCE_LINKADDR          1
 249 #define ND_OPT_TARGET_LINKADDR          2
 250 #define ND_OPT_PREFIX_INFORMATION       3
 251 #define ND_OPT_REDIRECTED_HEADER        4
 252 #define ND_OPT_MTU                      5
 253 #define ND_OPT_ADVINTERVAL              7
 254 #define ND_OPT_HOMEAGENT_INFO           8
 255 #define ND_OPT_ROUTE_INFO               9       /* draft-ietf-ipngwg-router-preference, not officially assigned yet */
 256
 257
 258 struct nd_opt_prefix_info {     /* prefix information */
 259         u_int8_t        nd_opt_pi_type;
 260         u_int8_t        nd_opt_pi_len;
 261         u_int8_t        nd_opt_pi_prefix_len;
 262         u_int8_t        nd_opt_pi_flags_reserved;
 263         u_int32_t       nd_opt_pi_valid_time;
 264         u_int32_t       nd_opt_pi_preferred_time;
 265         u_int32_t       nd_opt_pi_reserved2;
 266         struct in6_addr nd_opt_pi_prefix;
 267 };
 268
 269 #define ND_OPT_PI_FLAG_ONLINK           0x80
 270 #define ND_OPT_PI_FLAG_AUTO             0x40
 271 #define ND_OPT_PI_FLAG_ROUTER           0x20    /*2292bis*/
 272
 273 struct nd_opt_rd_hdr {         /* redirected header */
 274         u_int8_t        nd_opt_rh_type;
 275         u_int8_t        nd_opt_rh_len;
 276         u_int16_t       nd_opt_rh_reserved1;
 277         u_int32_t       nd_opt_rh_reserved2;
 278         /* followed by IP header and data */
 279 };
 280
 281 struct nd_opt_mtu {             /* MTU option */
 282         u_int8_t        nd_opt_mtu_type;
 283         u_int8_t        nd_opt_mtu_len;
 284         u_int16_t       nd_opt_mtu_reserved;
 285         u_int32_t       nd_opt_mtu_mtu;
 286 };
 287
 288 struct nd_opt_advinterval {     /* Advertisement interval option */
 289         u_int8_t        nd_opt_adv_type;
 290         u_int8_t        nd_opt_adv_len;
 291         u_int16_t       nd_opt_adv_reserved;
 292         u_int32_t       nd_opt_adv_interval;
 293 };
 294
 295 struct nd_opt_homeagent_info {  /* Home Agent info */
 296         u_int8_t        nd_opt_hai_type;
 297         u_int8_t        nd_opt_hai_len;
 298         u_int16_t       nd_opt_hai_reserved;
 299         int16_t         nd_opt_hai_preference;
 300         u_int16_t       nd_opt_hai_lifetime;
 301 };
 302
 303 struct nd_opt_route_info {      /* route info */
 304         u_int8_t        nd_opt_rti_type;
 305         u_int8_t        nd_opt_rti_len;
 306         u_int8_t        nd_opt_rti_prefixlen;
 307         u_int8_t        nd_opt_rti_flags;
 308         u_int32_t       nd_opt_rti_lifetime;
 309         /* prefix follows */
 310 };
 311
 312 /*
 313  * icmp6 namelookup
 314  */
 315
 316 struct icmp6_namelookup {
 317         struct icmp6_hdr        icmp6_nl_hdr;
 318         u_int8_t        icmp6_nl_nonce[8];
 319         int32_t         icmp6_nl_ttl;
 320 #if 0
 321         u_int8_t        icmp6_nl_len;
 322         u_int8_t        icmp6_nl_name[3];
 323 #endif
 324         /* could be followed by options */
 325 };
 326
 327 /*
 328  * icmp6 node information
 329  */
 330 struct icmp6_nodeinfo {
 331         struct icmp6_hdr icmp6_ni_hdr;
 332         u_int8_t icmp6_ni_nonce[8];
 333         /* could be followed by reply data */
 334 };
 335
 336 #define ni_type         icmp6_ni_hdr.icmp6_type
 337 #define ni_code         icmp6_ni_hdr.icmp6_code
 338 #define ni_cksum        icmp6_ni_hdr.icmp6_cksum
 339 #define ni_qtype        icmp6_ni_hdr.icmp6_data16[0]
 340 #define ni_flags        icmp6_ni_hdr.icmp6_data16[1]
 341
 342 #define NI_QTYPE_NOOP           0 /* NOOP  */
 343 #define NI_QTYPE_SUPTYPES       1 /* Supported Qtypes */
 344 #define NI_QTYPE_FQDN           2 /* FQDN (draft 04) */
 345 #define NI_QTYPE_DNSNAME        2 /* DNS Name */
 346 #define NI_QTYPE_NODEADDR       3 /* Node Addresses */
 347 #define NI_QTYPE_IPV4ADDR       4 /* IPv4 Addresses */
 348
 349 /* network endian */
 350 #define NI_SUPTYPE_FLAG_COMPRESS        ((u_int16_t)htons(0x1))
 351 #define NI_FQDN_FLAG_VALIDTTL           ((u_int16_t)htons(0x1))
 352
 353 /* network endian */
 354 #define NI_NODEADDR_FLAG_TRUNCATE       ((u_int16_t)htons(0x1))
 355 #define NI_NODEADDR_FLAG_ALL            ((u_int16_t)htons(0x2))
 356 #define NI_NODEADDR_FLAG_COMPAT         ((u_int16_t)htons(0x4))
 357 #define NI_NODEADDR_FLAG_LINKLOCAL      ((u_int16_t)htons(0x8))
 358 #define NI_NODEADDR_FLAG_SITELOCAL      ((u_int16_t)htons(0x10))
 359 #define NI_NODEADDR_FLAG_GLOBAL         ((u_int16_t)htons(0x20))
 360 #define NI_NODEADDR_FLAG_ANYCAST        ((u_int16_t)htons(0x40)) /* just experimental. not in spec */
 361
 362 struct ni_reply_fqdn {
 363         u_int32_t ni_fqdn_ttl;  /* TTL */
 364         u_int8_t ni_fqdn_namelen; /* length in octets of the FQDN */
 365         u_int8_t ni_fqdn_name[3]; /* XXX: alignment */
 366 };
 367
 368 /*
 369  * Router Renumbering. as router-renum-08.txt
 370  */
 371 struct icmp6_router_renum {     /* router renumbering header */
 372         struct icmp6_hdr        rr_hdr;
 373         u_int8_t        rr_segnum;
 374         u_int8_t        rr_flags;
 375         u_int16_t       rr_maxdelay;
 376         u_int32_t       rr_reserved;
 377 };
 378 #define ICMP6_RR_FLAGS_TEST             0x80
 379 #define ICMP6_RR_FLAGS_REQRESULT        0x40
 380 #define ICMP6_RR_FLAGS_FORCEAPPLY       0x20
 381 #define ICMP6_RR_FLAGS_SPECSITE         0x10
 382 #define ICMP6_RR_FLAGS_PREVDONE         0x08
 383
 384 #define rr_type         rr_hdr.icmp6_type
 385 #define rr_code         rr_hdr.icmp6_code
 386 #define rr_cksum        rr_hdr.icmp6_cksum
 387 #define rr_seqnum       rr_hdr.icmp6_data32[0]
 388
 389 struct rr_pco_match {           /* match prefix part */
 390         u_int8_t        rpm_code;
 391         u_int8_t        rpm_len;
 392         u_int8_t        rpm_ordinal;
 393         u_int8_t        rpm_matchlen;
 394         u_int8_t        rpm_minlen;
 395         u_int8_t        rpm_maxlen;
 396         u_int16_t       rpm_reserved;
 397         struct  in6_addr        rpm_prefix;
 398 };
 399
 400 #define RPM_PCO_ADD             1
 401 #define RPM_PCO_CHANGE          2
 402 #define RPM_PCO_SETGLOBAL       3
 403 #define RPM_PCO_MAX             4
 404
 405 struct rr_pco_use {             /* use prefix part */
 406         u_int8_t        rpu_uselen;
 407         u_int8_t        rpu_keeplen;
 408         u_int8_t        rpu_ramask;
 409         u_int8_t        rpu_raflags;
 410         u_int32_t       rpu_vltime;
 411         u_int32_t       rpu_pltime;
 412         u_int32_t       rpu_flags;
 413         struct  in6_addr rpu_prefix;
 414 };
 415 #define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK  0x80
 416 #define ICMP6_RR_PCOUSE_RAFLAGS_AUTO    0x40
 417
 418 /* network endian */
 419 #define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME     ((u_int32_t)htonl(0x80000000))
 420 #define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME     ((u_int32_t)htonl(0x40000000))
 421
 422 struct rr_result {              /* router renumbering result message */
 423         u_int16_t       rrr_flags;
 424         u_int8_t        rrr_ordinal;
 425         u_int8_t        rrr_matchedlen;
 426         u_int32_t       rrr_ifid;
 427         struct  in6_addr rrr_prefix;
 428 };
 429 /* network endian */
 430 #define ICMP6_RR_RESULT_FLAGS_OOB               ((u_int16_t)htons(0x0002))
 431 #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN         ((u_int16_t)htons(0x0001))
 432
 433 #endif /* not _NETINET_ICMP6_H_ */