sys/netinet6/in6.h

   1 /*      $FreeBSD: src/sys/netinet6/in6.h,v 1.7.2.7 2002/08/01 19:38:50 ume Exp $        */
   2 /*      $KAME: in6.h,v 1.89 2001/05/27 13:28:35 itojun 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, 1990, 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. Neither the name of the University nor the names of its contributors
  46  *    may be used to endorse or promote products derived from this software
  47  *    without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  50  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  51  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  52  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  53  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  54  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  55  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  56  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  57  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  58  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  59  * SUCH DAMAGE.
  60  *
  61  *      @(#)in.h        8.3 (Berkeley) 1/3/94
  62  */
  63
  64 #ifndef __KAME_NETINET_IN_H_INCLUDED_
  65 #error "do not include netinet6/in6.h directly, include netinet/in.h.  see RFC2553"
  66 #endif
  67
  68 #ifndef _NETINET6_IN6_H_
  69 #define _NETINET6_IN6_H_
  70
  71 #include <sys/cdefs.h>
  72
  73 /*
  74  * Identification of the network protocol stack
  75  * for *BSD-current/release: http://www.kame.net/dev/cvsweb.cgi/kame/COVERAGE
  76  * has the table of implementation/integration differences.
  77  */
  78 #define __KAME__
  79 #define __KAME_VERSION          "20010528/FreeBSD"
  80
  81 #ifndef _SA_FAMILY_T_DECLARED
  82 typedef __uint8_t       sa_family_t;
  83 #define _SA_FAMILY_T_DECLARED
  84 #endif
  85
  86 #ifndef _SIZE_T_DECLARED
  87 typedef __size_t        size_t;
  88 #define _SIZE_T_DECLARED
  89 #endif
  90
  91 #ifndef _SOCKLEN_T_DECLARED
  92 #define _SOCKLEN_T_DECLARED
  93 typedef __socklen_t     socklen_t;
  94 #endif
  95
  96 #ifndef _UINT8_T_DECLARED
  97 typedef __uint8_t       uint8_t;
  98 #define _UINT8_T_DECLARED
  99 #endif
 100 #ifndef _UINT16_T_DECLARED
 101 typedef __uint16_t      uint16_t;
 102 #define _UINT16_T_DECLARED
 103 #endif
 104 #ifndef _UINT32_T_DECLARED
 105 typedef __uint32_t      uint32_t;
 106 #define _UINT32_T_DECLARED
 107 #endif
 108
 109 /*
 110  * Local port number conventions:
 111  *
 112  * Ports < IPPORT_RESERVED are reserved for privileged processes (e.g. root),
 113  * unless a kernel is compiled with IPNOPRIVPORTS defined.
 114  *
 115  * When a user does a bind(2) or connect(2) with a port number of zero,
 116  * a non-conflicting local port address is chosen.
 117  *
 118  * The default range is IPPORT_ANONMIN to IPPORT_ANONMAX, although
 119  * that is settable by sysctl(3); net.inet.ip.anonportmin and
 120  * net.inet.ip.anonportmax respectively.
 121  *
 122  * A user may set the IPPROTO_IP option IP_PORTRANGE to change this
 123  * default assignment range.
 124  *
 125  * The value IP_PORTRANGE_DEFAULT causes the default behavior.
 126  *
 127  * The value IP_PORTRANGE_HIGH is the same as IP_PORTRANGE_DEFAULT,
 128  * and exists only for FreeBSD compatibility purposes.
 129  *
 130  * The value IP_PORTRANGE_LOW changes the range to the "low" are
 131  * that is (by convention) restricted to privileged processes.
 132  * This convention is based on "vouchsafe" principles only.
 133  * It is only secure if you trust the remote host to restrict these ports.
 134  * The range is IPPORT_RESERVEDMIN to IPPORT_RESERVEDMAX.
 135  */
 136
 137 #if __BSD_VISIBLE
 138 #define IPV6PORT_RESERVED       1024
 139 #define IPV6PORT_ANONMIN        49152
 140 #define IPV6PORT_ANONMAX        65535
 141 #define IPV6PORT_RESERVEDMIN    600
 142 #define IPV6PORT_RESERVEDMAX    (IPV6PORT_RESERVED-1)
 143 #endif
 144
 145 /*
 146  * IPv6 address
 147  */
 148 #ifndef _STRUCT_IN6_ADDR_DECLARED
 149 struct in6_addr {
 150         union {
 151                 uint8_t   __u6_addr8[16];
 152                 uint16_t  __u6_addr16[8];
 153                 uint32_t  __u6_addr32[4];
 154         } __u6_addr;                    /* 128-bit IP6 address */
 155 };
 156 #define _STRUCT_IN6_ADDR_DECLARED
 157 #endif
 158
 159 #define s6_addr         __u6_addr.__u6_addr8
 160 #define _s6_addr16      __u6_addr.__u6_addr16           /* internal use */
 161 #define _s6_addr32      __u6_addr.__u6_addr32           /* internal use */
 162 #if __BSD_VISIBLE                                       /* XXX nonstandard */
 163 #define s6_addr8        __u6_addr.__u6_addr8
 164 #define s6_addr16       __u6_addr.__u6_addr16
 165 #define s6_addr32       __u6_addr.__u6_addr32
 166 #endif
 167
 168 #define INET6_ADDRSTRLEN        46
 169
 170 /*
 171  * Socket address for IPv6
 172  */
 173 #if __BSD_VISIBLE
 174 #define SIN6_LEN
 175 #endif
 176
 177 struct sockaddr_in6 {
 178         uint8_t         sin6_len;       /* length of this struct(sa_family_t)*/
 179         sa_family_t     sin6_family;    /* AF_INET6 */
 180         uint16_t        sin6_port;      /* Transport layer port # (in_port_t)*/
 181         uint32_t        sin6_flowinfo;  /* IP6 flow information */
 182         struct in6_addr sin6_addr;      /* IP6 address */
 183         uint32_t        sin6_scope_id;  /* scope zone index */
 184 };
 185
 186 /*
 187  * Local definition for masks
 188  */
 189 #ifdef _KERNEL  /* XXX nonstandard */
 190 #define IN6MASK0        {{{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }}}
 191 #define IN6MASK32       {{{ 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, \
 192                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
 193 #define IN6MASK64       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
 194                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
 195 #define IN6MASK96       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
 196                             0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00 }}}
 197 #define IN6MASK128      {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
 198                             0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}}
 199 #endif
 200
 201 #ifdef _KERNEL
 202 extern const struct sockaddr_in6 sa6_any;
 203
 204 extern const struct in6_addr in6mask0;
 205 extern const struct in6_addr in6mask32;
 206 extern const struct in6_addr in6mask64;
 207 extern const struct in6_addr in6mask96;
 208 extern const struct in6_addr in6mask128;
 209 #endif /* _KERNEL */
 210
 211 /*
 212  * Macros started with IPV6_ADDR is KAME local
 213  */
 214 #if BYTE_ORDER == BIG_ENDIAN
 215 #define _IPV6_ADDR_INT16_UL_MASK        0xffc0
 216 #define _IPV6_ADDR_INT16_ULL            0xfe80
 217 #define _IPV6_ADDR_INT16_USL            0xfec0
 218 #else
 219 #define _IPV6_ADDR_INT16_UL_MASK        0xc0ff
 220 #define _IPV6_ADDR_INT16_ULL            0x80fe
 221 #define _IPV6_ADDR_INT16_USL            0xc0fe
 222 #endif
 223
 224 #ifdef _KERNEL  /* XXX nonstandard */
 225 #if BYTE_ORDER == BIG_ENDIAN
 226 #define IPV6_ADDR_INT32_ONE     1
 227 #define IPV6_ADDR_INT32_TWO     2
 228 #define IPV6_ADDR_INT32_MNL     0xff010000
 229 #define IPV6_ADDR_INT32_MLL     0xff020000
 230 #define IPV6_ADDR_INT32_SMP     0x0000ffff
 231 #define IPV6_ADDR_INT16_MLL     0xff02
 232 #elif BYTE_ORDER == LITTLE_ENDIAN
 233 #define IPV6_ADDR_INT32_ONE     0x01000000
 234 #define IPV6_ADDR_INT32_TWO     0x02000000
 235 #define IPV6_ADDR_INT32_MNL     0x000001ff
 236 #define IPV6_ADDR_INT32_MLL     0x000002ff
 237 #define IPV6_ADDR_INT32_SMP     0xffff0000
 238 #define IPV6_ADDR_INT16_MLL     0x02ff
 239 #endif
 240 #define IPV6_ADDR_INT16_ULL     _IPV6_ADDR_INT16_ULL
 241 #define IPV6_ADDR_INT16_USL     _IPV6_ADDR_INT16_USL
 242 #endif
 243
 244 /*
 245  * Definition of some useful macros to handle IP6 addresses
 246  */
 247 #define IN6ADDR_ANY_INIT                                                \
 248         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             \
 249             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
 250 #define IN6ADDR_LOOPBACK_INIT                                           \
 251         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             \
 252             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 253 #if __BSD_VISIBLE
 254 #define IN6ADDR_NODELOCAL_ALLNODES_INIT                                 \
 255         {{{ 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             \
 256             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 257 #define IN6ADDR_INTFACELOCAL_ALLNODES_INIT                              \
 258         {{{ 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             \
 259             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 260 #define IN6ADDR_LINKLOCAL_ALLNODES_INIT                                 \
 261         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             \
 262             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 263 #define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT                               \
 264         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             \
 265             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}}
 266 #define IN6ADDR_LINKLOCAL_ALLMDNS_INIT                                  \
 267         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             \
 268             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfb }}}
 269 #endif
 270
 271 #ifdef _KERNEL
 272 extern const struct in6_addr kin6addr_any;
 273 extern const struct in6_addr kin6addr_loopback;
 274 extern const struct in6_addr kin6addr_nodelocal_allnodes;
 275 extern const struct in6_addr kin6addr_linklocal_allnodes;
 276 extern const struct in6_addr kin6addr_linklocal_allrouters;
 277 #else
 278 extern const struct in6_addr in6addr_any;
 279 extern const struct in6_addr in6addr_loopback;
 280 #if __BSD_VISIBLE
 281 extern const struct in6_addr in6addr_nodelocal_allnodes;
 282 extern const struct in6_addr in6addr_linklocal_allnodes;
 283 #endif
 284 #endif
 285
 286 #if __BSD_VISIBLE || defined(_KERNEL)
 287 #define IN6_ARE_ADDR_EQUAL(a, b)                                        \
 288     (memcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
 289 #endif
 290
 291 #ifdef _KERNEL                  /* non standard */
 292 /* see if two addresses are equal in a scope-conscious manner. */
 293 #define SA6_ARE_ADDR_EQUAL(a, b) \
 294         (((a)->sin6_scope_id == 0 || (b)->sin6_scope_id == 0 ||         \
 295           (a)->sin6_scope_id == (b)->sin6_scope_id) &&                  \
 296          (bcmp(&(a)->sin6_addr, &(b)->sin6_addr, sizeof(struct in6_addr)) == 0))
 297 #endif
 298
 299 /*
 300  * Unspecified
 301  */
 302 #define IN6_IS_ADDR_UNSPECIFIED(a)                                      \
 303         ((a)->_s6_addr32[0] == 0 && (a)->_s6_addr32[1] == 0 &&          \
 304          (a)->_s6_addr32[2] == 0 && (a)->_s6_addr32[3] == 0)
 305
 306 /*
 307  * Loopback
 308  */
 309 #define IN6_IS_ADDR_LOOPBACK(a)                                         \
 310         ((a)->_s6_addr32[0] == 0 && (a)->_s6_addr32[1] == 0 &&  \
 311          (a)->_s6_addr32[2] == 0 && (a)->_s6_addr32[3] == ntohl(1))
 312
 313 /*
 314  * Mapped
 315  */
 316 #define IN6_IS_ADDR_V4MAPPED(a)                                         \
 317         ((a)->_s6_addr32[0] == 0 && (a)->_s6_addr32[1] == 0 &&          \
 318          (a)->_s6_addr32[2] == ntohl(0x0000ffff))
 319
 320 /*
 321  * IPv4 compatible.  Deprecated by RFC4291.
 322  */
 323 #define IN6_IS_ADDR_V4COMPAT(a)                                         \
 324         ((a)->_s6_addr32[0] == 0 &&                                     \
 325          (a)->_s6_addr32[1] == 0 &&                                     \
 326          (a)->_s6_addr32[2] == 0 &&                                     \
 327          (a)->_s6_addr32[3] != 0 && (a)->_s6_addr32[3] != ntohl(1))
 328
 329 /*
 330  * KAME Scope Values
 331  */
 332
 333 #ifdef _KERNEL                                  /* XXX nonstandard */
 334 #define IPV6_ADDR_SCOPE_NODELOCAL       0x01
 335 #define IPV6_ADDR_SCOPE_INTFACELOCAL    0x01
 336 #define IPV6_ADDR_SCOPE_LINKLOCAL       0x02
 337 #define IPV6_ADDR_SCOPE_SITELOCAL       0x05
 338 #define IPV6_ADDR_SCOPE_ORGLOCAL        0x08    /* just used in this file */
 339 #define IPV6_ADDR_SCOPE_GLOBAL          0x0e
 340 #else
 341 #define __IPV6_ADDR_SCOPE_NODELOCAL     0x01
 342 #define __IPV6_ADDR_SCOPE_INTFACELOCAL  0x01
 343 #define __IPV6_ADDR_SCOPE_LINKLOCAL     0x02
 344 #define __IPV6_ADDR_SCOPE_SITELOCAL     0x05
 345 #define __IPV6_ADDR_SCOPE_ORGLOCAL      0x08    /* just used in this file */
 346 #define __IPV6_ADDR_SCOPE_GLOBAL        0x0e
 347 #endif
 348
 349 /*
 350  * Unicast Scope
 351  * Note that we must check topmost 10 bits only, not 16 bits (see RFC2373).
 352  */
 353 #define IN6_IS_ADDR_LINKLOCAL(a)                                        \
 354     (((a)->_s6_addr16[0] & _IPV6_ADDR_INT16_UL_MASK) == _IPV6_ADDR_INT16_ULL)
 355 #define IN6_IS_ADDR_SITELOCAL(a)                                        \
 356     (((a)->_s6_addr16[0] & _IPV6_ADDR_INT16_UL_MASK) == _IPV6_ADDR_INT16_USL)
 357
 358 /*
 359  * Multicast
 360  */
 361 #define IN6_IS_ADDR_MULTICAST(a)        ((a)->s6_addr[0] == 0xff)
 362 #define __IPV6_ADDR_MC_SCOPE(a)         ((a)->s6_addr[1] & 0x0f)
 363 #ifdef _KERNEL                                  /* XXX nonstandard */
 364 #define IPV6_ADDR_MC_SCOPE(a)           __IPV6_ADDR_MC_SCOPE(a)
 365 #endif
 366
 367 /*
 368  * Multicast Scope
 369  */
 370 #ifdef _KERNEL
 371 #define IN6_IS_ADDR_MC_NODELOCAL(a)                                     \
 372         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
 373          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_NODELOCAL))
 374
 375 #define IN6_IS_ADDR_MC_INTFACELOCAL(a)                                  \
 376         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
 377          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_INTFACELOCAL))
 378
 379 #define IN6_IS_ADDR_MC_LINKLOCAL(a)                                     \
 380         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
 381          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_LINKLOCAL))
 382
 383 #define IN6_IS_ADDR_MC_SITELOCAL(a)                                     \
 384         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
 385          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_SITELOCAL))
 386
 387 #define IN6_IS_ADDR_MC_ORGLOCAL(a)                                      \
 388         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
 389          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_ORGLOCAL))
 390
 391 #define IN6_IS_ADDR_MC_GLOBAL(a)                                        \
 392         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
 393          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_GLOBAL))
 394 #else
 395 #define IN6_IS_ADDR_MC_NODELOCAL(a)                                     \
 396         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
 397          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_NODELOCAL))
 398
 399 #define IN6_IS_ADDR_MC_LINKLOCAL(a)                                     \
 400         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
 401          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_LINKLOCAL))
 402
 403 #define IN6_IS_ADDR_MC_SITELOCAL(a)                                     \
 404         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
 405          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_SITELOCAL))
 406
 407 #define IN6_IS_ADDR_MC_ORGLOCAL(a)                                      \
 408         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
 409          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_ORGLOCAL))
 410
 411 #define IN6_IS_ADDR_MC_GLOBAL(a)                                        \
 412         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
 413          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_GLOBAL))
 414 #endif
 415
 416 #ifdef _KERNEL  /* nonstandard */
 417 /*
 418  * KAME Scope
 419  */
 420 #define IN6_IS_SCOPE_LINKLOCAL(a)                                       \
 421         (IN6_IS_ADDR_LINKLOCAL(a) || IN6_IS_ADDR_MC_LINKLOCAL(a))
 422 #define IN6_IS_SCOPE_EMBED(a)                                           \
 423         ((IN6_IS_ADDR_LINKLOCAL(a)) ||                                  \
 424          (IN6_IS_ADDR_MC_LINKLOCAL(a)) ||                               \
 425          (IN6_IS_ADDR_MC_INTFACELOCAL(a)))
 426
 427
 428 #define IFA6_IS_DEPRECATED(a)                                           \
 429         ((a)->ia6_lifetime.ia6t_preferred != 0 &&                       \
 430          (a)->ia6_lifetime.ia6t_preferred < time_uptime)
 431
 432 #define IFA6_IS_INVALID(a)                                              \
 433         ((a)->ia6_lifetime.ia6t_expire != 0 &&                          \
 434          (a)->ia6_lifetime.ia6t_expire < time_uptime)
 435 #endif
 436
 437 /*
 438  * IP6 route structure
 439  */
 440 #if __BSD_VISIBLE
 441 struct route_in6 {
 442         struct rtentry          *ro_rt;
 443         struct sockaddr_in6     ro_dst;
 444 };
 445 #endif
 446
 447 /*
 448  * Options for use with [gs]etsockopt at the IPV6 level.
 449  * First word of comment is data type; bool is stored in int.
 450  */
 451 /* no hdrincl */
 452 #if 0 /* the followings are relic in IPv4 and hence are disabled */
 453 #define IPV6_OPTIONS            1  /* buf/ip6_opts; set/get IP6 options */
 454 #define IPV6_RECVOPTS           5  /* bool; receive all IP6 opts w/dgram */
 455 #define IPV6_RECVRETOPTS        6  /* bool; receive IP6 opts for response */
 456 #define IPV6_RECVDSTADDR        7  /* bool; receive IP6 dst addr w/dgram */
 457 #define IPV6_RETOPTS            8  /* ip6_opts; set/get IP6 options */
 458 #endif
 459 #if __BSD_VISIBLE
 460 #define IPV6_SOCKOPT_RESERVED1  3  /* reserved for future use */
 461 #endif
 462 #define IPV6_UNICAST_HOPS       4  /* int; IP6 hops */
 463 #define IPV6_MULTICAST_IF       9  /* u_int; set/get IP6 multicast i/f  */
 464 #define IPV6_MULTICAST_HOPS     10 /* int; set/get IP6 multicast hops */
 465 #define IPV6_MULTICAST_LOOP     11 /* u_int; set/get IP6 multicast loopback */
 466 #define IPV6_JOIN_GROUP         12 /* ip6_mreq; join a group membership */
 467 #define IPV6_LEAVE_GROUP        13 /* ip6_mreq; leave a group membership */
 468 #if __BSD_VISIBLE
 469 #define IPV6_PORTRANGE          14 /* int; range to choose for unspec port */
 470 #define ICMP6_FILTER            18 /* icmp6_filter; icmp6 filter */
 471 #endif
 472 /* RFC2292 options */
 473 #ifdef _KERNEL
 474 #define IPV6_2292PKTINFO        19 /* bool; send/recv if, src/dst addr */
 475 #define IPV6_2292HOPLIMIT       20 /* bool; hop limit */
 476 #define IPV6_2292NEXTHOP        21 /* bool; next hop addr */
 477 #define IPV6_2292HOPOPTS        22 /* bool; hop-by-hop option */
 478 #define IPV6_2292DSTOPTS        23 /* bool; destinaion option */
 479 #define IPV6_2292RTHDR          24 /* bool; routing header */
 480 #define IPV6_2292PKTOPTIONS     25 /* buf/cmsghdr; set/get IPv6 options */
 481 #endif
 482
 483 #if __BSD_VISIBLE
 484 #define IPV6_CHECKSUM           26 /* int; checksum offset for raw socket */
 485 #endif
 486 #define IPV6_V6ONLY             27 /* bool; only bind INET6 at wildcard bind */
 487 #ifndef _KERNEL
 488 #define IPV6_BINDV6ONLY         IPV6_V6ONLY
 489 #endif
 490
 491 #if __BSD_VISIBLE
 492 #if 1 /* IPV6FIREWALL */
 493 #define IPV6_FW_ADD             30 /* add a firewall rule to chain */
 494 #define IPV6_FW_DEL             31 /* delete a firewall rule from chain */
 495 #define IPV6_FW_FLUSH           32 /* flush firewall rule chain */
 496 #define IPV6_FW_ZERO            33 /* clear single/all firewall counter(s) */
 497 #define IPV6_FW_GET             34 /* get entire firewall rule chain */
 498 #endif
 499
 500 /*
 501  * new socket options introduced in RFC3542
 502  */
 503 #define IPV6_RTHDRDSTOPTS       35 /* ip6_dest; send dst option before rthdr */
 504 #define IPV6_RECVPKTINFO        36 /* bool; recv if, dst addr */
 505 #define IPV6_RECVHOPLIMIT       37 /* bool; recv hop limit */
 506 #define IPV6_RECVRTHDR          38 /* bool; recv routing header */
 507 #define IPV6_RECVHOPOPTS        39 /* bool; recv hop-by-hop option */
 508 #define IPV6_RECVDSTOPTS        40 /* bool; recv dst option after rthdr */
 509 #endif
 510 #ifdef _KERNEL
 511 #define IPV6_RECVRTHDRDSTOPTS   41 /* bool; recv dst option before rthdr */
 512 #endif
 513 #if __BSD_VISIBLE
 514 #define IPV6_USE_MIN_MTU        42 /* bool; send packets at the minimum MTU */
 515 #define IPV6_RECVPATHMTU        43 /* bool; notify an according MTU */
 516
 517 /* mtuinfo; get the current path MTU (sopt),
 518  * 4 bytes int; MTU notification (cmsg)
 519  */
 520 #define IPV6_PATHMTU            44
 521 #if 0 /*obsoleted during 2292bis -> 3542*/
 522 #define IPV6_REACHCONF          45 /* no data; ND reachability confirm
 523                                       (cmsg only/not in of RFC3542) */
 524 #endif
 525 #define IPV6_PKTINFO            46 /* in6_pktinfo; send if, src addr */
 526 #define IPV6_HOPLIMIT           47 /* int; send hop limit */
 527 #define IPV6_NEXTHOP            48 /* sockaddr; next hop addr */
 528 #define IPV6_HOPOPTS            49 /* ip6_hbh; send hop-by-hop option */
 529 #define IPV6_DSTOPTS            50 /* ip6_dest; send dst option befor rthdr */
 530 #define IPV6_RTHDR              51 /* ip6_rthdr; send routing header */
 531 #define IPV6_PKTOPTIONS         52 /* buf/cmsghdr; set/get IPv6 options, this is obsoleted by RFC3542 */
 532
 533 #define IPV6_RECVTCLASS         57 /* bool; recv traffic class values */
 534
 535 #define IPV6_AUTOFLOWLABEL      59 /* bool; attach flowlabel automagically */
 536
 537 #define IPV6_TCLASS             61 /* int; send traffic class value */
 538 #define IPV6_DONTFRAG           62 /* bool; disable IPv6 fragmentation */
 539
 540 #define IPV6_PREFER_TEMPADDR    63 /* int; prefer temporary addresses as
 541                                     * the source address.
 542                                     */
 543 /*
 544  * The following option is private; do not use it from user applications.
 545  * It is deliberately defined to the same value as IP_MSFILTER.
 546  */
 547 #define IPV6_MSFILTER           74 /* struct __msfilterreq;
 548                                     * set/get multicast source filter list.
 549                                     */
 550 /* to define items, should talk with KAME guys first, for *BSD compatibility */
 551
 552 #define IPV6_RTHDR_LOOSE     0 /* this hop need not be a neighbor. XXX old spec */
 553 #define IPV6_RTHDR_STRICT    1 /* this hop must be a neighbor. XXX old spec */
 554 #define IPV6_RTHDR_TYPE_0    0 /* IPv6 routing header type 0 */
 555
 556 /*
 557  * Defaults and limits for options
 558  */
 559 #define IPV6_DEFAULT_MULTICAST_HOPS 1   /* normally limit m'casts to 1 hop */
 560 #define IPV6_DEFAULT_MULTICAST_LOOP 1   /* normally hear sends if a member */
 561 #endif /* __BSD_VISIBLE */
 562
 563 /*
 564  * Argument structure for IPV6_JOIN_GROUP and IPV6_LEAVE_GROUP.
 565  */
 566 struct ipv6_mreq {
 567         struct in6_addr ipv6mr_multiaddr;
 568         unsigned int    ipv6mr_interface;
 569 };
 570
 571 #if __BSD_VISIBLE
 572 /*
 573  * IPV6_PKTINFO: Packet information(RFC2292 sec 5)
 574  */
 575 struct in6_pktinfo {
 576         struct in6_addr ipi6_addr;      /* src/dst IPv6 address */
 577         unsigned int    ipi6_ifindex;   /* send/recv interface index */
 578 };
 579
 580 /*
 581  * New Control structure for IPV6_RECVPATHMTU socket option introduced in RFC3542.
 582  */
 583 struct ip6_mtuinfo {
 584         struct sockaddr_in6 ip6m_addr;  /* or sockaddr_storage? */
 585         uint32_t ip6m_mtu;
 586 };
 587
 588 /*
 589  * Argument for IPV6_PORTRANGE:
 590  * - which range to search when port is unspecified at bind() or connect()
 591  */
 592 #define IPV6_PORTRANGE_DEFAULT  0       /* default range */
 593 #define IPV6_PORTRANGE_HIGH     1       /* "high" - request firewall bypass */
 594 #define IPV6_PORTRANGE_LOW      2       /* "low" - vouchsafe security */
 595
 596 /*
 597  * Definitions for inet6 sysctl operations.
 598  *
 599  * Third level is protocol number.
 600  * Fourth level is desired variable within that protocol.
 601  */
 602 #define IPV6PROTO_MAXID (IPPROTO_PIM + 1)       /* don't list to IPV6PROTO_MAX */
 603
 604 /*
 605  * Names for IP sysctl objects
 606  */
 607 #define IPV6CTL_FORWARDING      1       /* act as router */
 608 #define IPV6CTL_SENDREDIRECTS   2       /* may send redirects when forwarding*/
 609 #define IPV6CTL_DEFHLIM         3       /* default Hop-Limit */
 610 #ifdef notyet
 611 #define IPV6CTL_DEFMTU          4       /* default MTU */
 612 #endif
 613 #define IPV6CTL_FORWSRCRT       5       /* forward source-routed dgrams */
 614 #define IPV6CTL_STATS           6       /* stats */
 615 #define IPV6CTL_MRTSTATS        7       /* multicast forwarding stats */
 616 #define IPV6CTL_MRTPROTO        8       /* multicast routing protocol */
 617 #define IPV6CTL_MAXFRAGPACKETS  9       /* max packets reassembly queue */
 618 #define IPV6CTL_SOURCECHECK     10      /* verify source route and intf */
 619 #define IPV6CTL_SOURCECHECK_LOGINT 11   /* minimume logging interval */
 620 #define IPV6CTL_ACCEPT_RTADV    12
 621 #define IPV6CTL_LOG_INTERVAL    14
 622 #define IPV6CTL_HDRNESTLIMIT    15
 623 #define IPV6CTL_DAD_COUNT       16
 624 #define IPV6CTL_AUTO_FLOWLABEL  17
 625 #define IPV6CTL_DEFMCASTHLIM    18
 626 #define IPV6CTL_GIF_HLIM        19      /* default HLIM for gif encap packet */
 627 #define IPV6CTL_KAME_VERSION    20
 628 #define IPV6CTL_USE_DEPRECATED  21      /* use deprecated addr (RFC2462 5.5.4) */
 629 #define IPV6CTL_RR_PRUNE        22      /* walk timer for router renumbering */
 630 #if 0   /* obsolete */
 631 #define IPV6CTL_MAPPED_ADDR     23
 632 #define IPV6CTL_V6ONLY          24
 633 #endif
 634 #define IPV6CTL_RTEXPIRE        25      /* cloned route expiration time */
 635 #define IPV6CTL_RTMINEXPIRE     26      /* min value for expiration time */
 636 #define IPV6CTL_RTMAXCACHE      27      /* trigger level for dynamic expire */
 637
 638 #define IPV6CTL_USETEMPADDR     32      /* use temporary addresses (RFC3041) */
 639 #define IPV6CTL_TEMPPLTIME      33      /* preferred lifetime for tmpaddrs */
 640 #define IPV6CTL_TEMPVLTIME      34      /* valid lifetime for tmpaddrs */
 641 #define IPV6CTL_AUTO_LINKLOCAL  35      /* automatic link-local addr assign */
 642 #define IPV6CTL_RIP6STATS       36      /* raw_ip6 stats */
 643
 644 #define IPV6CTL_ADDRCTLPOLICY   38      /* get/set address selection policy */
 645 #define IPV6CTL_MINHLIM         39      /* minimum Hop-Limit */
 646
 647 #define IPV6CTL_MAXFRAGS        41      /* max fragments */
 648
 649 /* New entries should be added here from current IPV6CTL_MAXID value. */
 650 /* to define items, should talk with KAME guys first, for *BSD compatibility */
 651
 652 #define ICMPV6CTL_ND6_ONLINKNSRFC4861   47
 653 #define IPV6CTL_MAXID           48
 654
 655 /*
 656  * Redefinition of mbuf flags
 657  */
 658 #define M_AUTHIPHDR     M_PROTO2
 659 #define M_DECRYPTED     M_PROTO3
 660 #define M_LOOP          M_PROTO4
 661 #define M_AUTHIPDGM     M_PROTO5
 662 #endif /* __BSD_VISIBLE */
 663
 664 #ifdef _KERNEL
 665
 666 struct ifnet;
 667 struct mbuf;
 668 struct sockaddr;
 669 struct sockaddr_in;
 670 struct sockaddr_in6;
 671
 672 int     in6_cksum (struct mbuf *, uint8_t, uint32_t, uint32_t);
 673 int     in6_localaddr (struct in6_addr *);
 674 int     in6_addrscope (struct in6_addr *);
 675 struct  in6_ifaddr *in6_ifawithscope (struct ifnet *, struct in6_addr *, struct ucred *);
 676 struct  in6_ifaddr *in6_ifawithifp (struct ifnet *, struct in6_addr *);
 677
 678 void    addrsel_policy_init (void);
 679
 680 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
 681 #define sin6tosa(sin6)  ((struct sockaddr *)(sin6))
 682 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
 683 #endif /* _KERNEL */
 684
 685 #if __BSD_VISIBLE
 686 __BEGIN_DECLS
 687 struct cmsghdr;
 688
 689 uint8_t *inet6_option_alloc (struct cmsghdr *, int, int, int);
 690 int inet6_option_append (struct cmsghdr *, const uint8_t *, int, int);
 691 int inet6_option_find (const struct cmsghdr *, uint8_t **, int);
 692 int inet6_option_init (void *, struct cmsghdr **, int);
 693 int inet6_option_next (const struct cmsghdr *, uint8_t **);
 694 int inet6_option_space (int);
 695
 696 int inet6_opt_append (void *, socklen_t, int, uint8_t, socklen_t, uint8_t, void **);
 697 int inet6_opt_find (void *, socklen_t, int, uint8_t, socklen_t *, void **);
 698 int inet6_opt_finish (void *, socklen_t, int);
 699 int inet6_opt_get_val (void *, int, void *, socklen_t);
 700 int inet6_opt_init (void *, socklen_t);
 701 int inet6_opt_next (void *, socklen_t, int, uint8_t *, socklen_t *, void **);
 702 int inet6_opt_set_val (void *, int, void *, socklen_t);
 703
 704 int              inet6_rth_add (void *, const struct in6_addr *);
 705 struct in6_addr *inet6_rth_getaddr (const void *, int);
 706 void            *inet6_rth_init (void *, socklen_t, int, int);
 707 int              inet6_rth_reverse (const void *, void *);
 708 int              inet6_rth_segments (const void *);
 709 socklen_t        inet6_rth_space (int, int);
 710
 711 int              inet6_rthdr_add (struct cmsghdr *, const struct in6_addr *,
 712                                   unsigned int);
 713 struct in6_addr *inet6_rthdr_getaddr (struct cmsghdr *, int);
 714 int              inet6_rthdr_getflags (const struct cmsghdr *, int);
 715 struct cmsghdr  *inet6_rthdr_init (void *, int);
 716 int              inet6_rthdr_lasthop (struct cmsghdr *, unsigned int);
 717 int              inet6_rthdr_reverse (const struct cmsghdr *, struct cmsghdr *);
 718 int              inet6_rthdr_segments (const struct cmsghdr *);
 719 size_t           inet6_rthdr_space (int, int);
 720 __END_DECLS
 721 #endif /* __BSD_VISIBLE */
 722
 723 #endif /* !_NETINET6_IN6_H_ */