bsd/netinet6/in6.h

   1 /*      $FreeBSD: src/sys/netinet6/in6.h,v 1.7.2.4 2001/07/04 09:45:23 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. 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  *      @(#)in.h        8.3 (Berkeley) 1/3/94
  66  */
  67
  68 #ifndef __KAME_NETINET_IN_H_INCLUDED_
  69 #error "do not include netinet6/in6.h directly, include netinet/in.h.  see RFC2553"
  70 #endif
  71
  72 #ifndef _NETINET6_IN6_H_
  73 #define _NETINET6_IN6_H_
  74 #include <sys/appleapiopts.h>
  75
  76 /*
  77  * Identification of the network protocol stack
  78  * for *BSD-current/release: http://www.kame.net/dev/cvsweb.cgi/kame/COVERAGE
  79  * has the table of implementation/integration differences.
  80  */
  81 #define __KAME__
  82 #define __KAME_VERSION          "20010528/apple-darwin"
  83
  84 /*
  85  * Local port number conventions:
  86  *
  87  * Ports < IPPORT_RESERVED are reserved for privileged processes (e.g. root),
  88  * unless a kernel is compiled with IPNOPRIVPORTS defined.
  89  *
  90  * When a user does a bind(2) or connect(2) with a port number of zero,
  91  * a non-conflicting local port address is chosen.
  92  *
  93  * The default range is IPPORT_ANONMIN to IPPORT_ANONMAX, although
  94  * that is settable by sysctl(3); net.inet.ip.anonportmin and
  95  * net.inet.ip.anonportmax respectively.
  96  *
  97  * A user may set the IPPROTO_IP option IP_PORTRANGE to change this
  98  * default assignment range.
  99  *
 100  * The value IP_PORTRANGE_DEFAULT causes the default behavior.
 101  *
 102  * The value IP_PORTRANGE_HIGH is the same as IP_PORTRANGE_DEFAULT,
 103  * and exists only for FreeBSD compatibility purposes.
 104  *
 105  * The value IP_PORTRANGE_LOW changes the range to the "low" are
 106  * that is (by convention) restricted to privileged processes.
 107  * This convention is based on "vouchsafe" principles only.
 108  * It is only secure if you trust the remote host to restrict these ports.
 109  * The range is IPPORT_RESERVEDMIN to IPPORT_RESERVEDMAX.
 110  */
 111
 112 #define IPV6PORT_RESERVED       1024
 113 #define IPV6PORT_ANONMIN        49152
 114 #define IPV6PORT_ANONMAX        65535
 115 #define IPV6PORT_RESERVEDMIN    600
 116 #define IPV6PORT_RESERVEDMAX    (IPV6PORT_RESERVED-1)
 117
 118 /*
 119  * IPv6 address
 120  */
 121 struct in6_addr {
 122         union {
 123                 u_int8_t   __u6_addr8[16];
 124                 u_int16_t  __u6_addr16[8];
 125                 u_int32_t  __u6_addr32[4];
 126         } __u6_addr;                    /* 128-bit IP6 address */
 127 };
 128
 129 #define s6_addr   __u6_addr.__u6_addr8
 130 #ifdef KERNEL   /*XXX nonstandard*/
 131 #define s6_addr8  __u6_addr.__u6_addr8
 132 #define s6_addr16 __u6_addr.__u6_addr16
 133 #define s6_addr32 __u6_addr.__u6_addr32
 134 #endif
 135
 136 #define INET6_ADDRSTRLEN        46
 137
 138 /*
 139  * Socket address for IPv6
 140  */
 141 #if !defined(_XOPEN_SOURCE)
 142 #define SIN6_LEN
 143 #endif
 144 struct sockaddr_in6 {
 145         u_int8_t        sin6_len;       /* length of this struct(sa_family_t)*/
 146         u_int8_t        sin6_family;    /* AF_INET6 (sa_family_t) */
 147         u_int16_t       sin6_port;      /* Transport layer port # (in_port_t)*/
 148         u_int32_t       sin6_flowinfo;  /* IP6 flow information */
 149         struct in6_addr sin6_addr;      /* IP6 address */
 150         u_int32_t       sin6_scope_id;  /* scope zone index */
 151 };
 152
 153 /*
 154  * Local definition for masks
 155  */
 156 #ifdef KERNEL   /*XXX nonstandard*/
 157 #define IN6MASK0        {{{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }}}
 158 #define IN6MASK32       {{{ 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, \
 159                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
 160 #define IN6MASK64       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
 161                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
 162 #define IN6MASK96       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
 163                             0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00 }}}
 164 #define IN6MASK128      {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
 165                             0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}}
 166 #endif
 167
 168 #ifdef KERNEL
 169 extern const struct sockaddr_in6 sa6_any;
 170
 171 extern const struct in6_addr in6mask0;
 172 extern const struct in6_addr in6mask32;
 173 extern const struct in6_addr in6mask64;
 174 extern const struct in6_addr in6mask96;
 175 extern const struct in6_addr in6mask128;
 176 #endif /* KERNEL */
 177
 178 /*
 179  * Macros started with IPV6_ADDR is KAME local
 180  */
 181 #ifdef KERNEL   /*XXX nonstandard*/
 182 #if BYTE_ORDER == BIG_ENDIAN
 183 #define IPV6_ADDR_INT32_ONE     1
 184 #define IPV6_ADDR_INT32_TWO     2
 185 #define IPV6_ADDR_INT32_MNL     0xff010000
 186 #define IPV6_ADDR_INT32_MLL     0xff020000
 187 #define IPV6_ADDR_INT32_SMP     0x0000ffff
 188 #define IPV6_ADDR_INT16_ULL     0xfe80
 189 #define IPV6_ADDR_INT16_USL     0xfec0
 190 #define IPV6_ADDR_INT16_MLL     0xff02
 191 #elif BYTE_ORDER == LITTLE_ENDIAN
 192 #define IPV6_ADDR_INT32_ONE     0x01000000
 193 #define IPV6_ADDR_INT32_TWO     0x02000000
 194 #define IPV6_ADDR_INT32_MNL     0x000001ff
 195 #define IPV6_ADDR_INT32_MLL     0x000002ff
 196 #define IPV6_ADDR_INT32_SMP     0xffff0000
 197 #define IPV6_ADDR_INT16_ULL     0x80fe
 198 #define IPV6_ADDR_INT16_USL     0xc0fe
 199 #define IPV6_ADDR_INT16_MLL     0x02ff
 200 #endif
 201 #endif
 202
 203 /*
 204  * Definition of some useful macros to handle IP6 addresses
 205  */
 206 #define IN6ADDR_ANY_INIT \
 207         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 208             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
 209 #define IN6ADDR_LOOPBACK_INIT \
 210         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 211             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 212 #define IN6ADDR_NODELOCAL_ALLNODES_INIT \
 213         {{{ 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 214             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 215 #define IN6ADDR_LINKLOCAL_ALLNODES_INIT \
 216         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 217             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 218 #define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \
 219         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 220             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}}
 221
 222 extern const struct in6_addr in6addr_any;
 223 extern const struct in6_addr in6addr_loopback;
 224 extern const struct in6_addr in6addr_nodelocal_allnodes;
 225 extern const struct in6_addr in6addr_linklocal_allnodes;
 226 extern const struct in6_addr in6addr_linklocal_allrouters;
 227
 228 /*
 229  * Equality
 230  * NOTE: Some of kernel programming environment (for example, openbsd/sparc)
 231  * does not supply memcmp().  For userland memcmp() is preferred as it is
 232  * in ANSI standard.
 233  */
 234 #ifdef KERNEL
 235 #define IN6_ARE_ADDR_EQUAL(a, b)                        \
 236     (bcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
 237 #else
 238 #define IN6_ARE_ADDR_EQUAL(a, b)                        \
 239     (memcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
 240 #endif
 241
 242 #ifdef KERNEL                   /* non standard */
 243 /* see if two addresses are equal in a scope-conscious manner. */
 244 #define SA6_ARE_ADDR_EQUAL(a, b) \
 245         (((a)->sin6_scope_id == 0 || (b)->sin6_scope_id == 0 || \
 246           ((a)->sin6_scope_id == (b)->sin6_scope_id)) && \
 247          (bcmp(&(a)->sin6_addr, &(b)->sin6_addr, sizeof(struct in6_addr)) == 0))
 248 #endif
 249
 250 /*
 251  * Unspecified
 252  */
 253 #define IN6_IS_ADDR_UNSPECIFIED(a)      \
 254         ((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
 255          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
 256          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == 0) && \
 257          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) == 0))
 258
 259 /*
 260  * Loopback
 261  */
 262 #define IN6_IS_ADDR_LOOPBACK(a)         \
 263         ((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
 264          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
 265          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == 0) && \
 266          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) == ntohl(1)))
 267
 268 /*
 269  * IPv4 compatible
 270  */
 271 #define IN6_IS_ADDR_V4COMPAT(a)         \
 272         ((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
 273          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
 274          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == 0) && \
 275          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) != 0) &&        \
 276          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) != ntohl(1)))
 277
 278 /*
 279  * Mapped
 280  */
 281 #define IN6_IS_ADDR_V4MAPPED(a)               \
 282         ((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
 283          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
 284          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == ntohl(0x0000ffff)))
 285
 286 /*
 287  * KAME Scope Values
 288  */
 289
 290 #ifdef KERNEL   /*XXX nonstandard*/
 291 #define IPV6_ADDR_SCOPE_NODELOCAL       0x01
 292 #define IPV6_ADDR_SCOPE_LINKLOCAL       0x02
 293 #define IPV6_ADDR_SCOPE_SITELOCAL       0x05
 294 #define IPV6_ADDR_SCOPE_ORGLOCAL        0x08    /* just used in this file */
 295 #define IPV6_ADDR_SCOPE_GLOBAL          0x0e
 296 #else
 297 #define __IPV6_ADDR_SCOPE_NODELOCAL     0x01
 298 #define __IPV6_ADDR_SCOPE_LINKLOCAL     0x02
 299 #define __IPV6_ADDR_SCOPE_SITELOCAL     0x05
 300 #define __IPV6_ADDR_SCOPE_ORGLOCAL      0x08    /* just used in this file */
 301 #define __IPV6_ADDR_SCOPE_GLOBAL        0x0e
 302 #endif
 303
 304 /*
 305  * Unicast Scope
 306  * Note that we must check topmost 10 bits only, not 16 bits (see RFC2373).
 307  */
 308 #define IN6_IS_ADDR_LINKLOCAL(a)        \
 309         (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0x80))
 310 #define IN6_IS_ADDR_SITELOCAL(a)        \
 311         (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0xc0))
 312
 313 /*
 314  * Multicast
 315  */
 316 #define IN6_IS_ADDR_MULTICAST(a)        ((a)->s6_addr[0] == 0xff)
 317
 318 #ifdef KERNEL   /*XXX nonstandard*/
 319 #define IPV6_ADDR_MC_SCOPE(a)           ((a)->s6_addr[1] & 0x0f)
 320 #else
 321 #define __IPV6_ADDR_MC_SCOPE(a)         ((a)->s6_addr[1] & 0x0f)
 322 #endif
 323
 324 /*
 325  * Multicast Scope
 326  */
 327 #ifdef KERNEL   /*refers nonstandard items */
 328 #define IN6_IS_ADDR_MC_NODELOCAL(a)     \
 329         (IN6_IS_ADDR_MULTICAST(a) &&    \
 330          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_NODELOCAL))
 331 #define IN6_IS_ADDR_MC_LINKLOCAL(a)     \
 332         (IN6_IS_ADDR_MULTICAST(a) &&    \
 333          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_LINKLOCAL))
 334 #define IN6_IS_ADDR_MC_SITELOCAL(a)     \
 335         (IN6_IS_ADDR_MULTICAST(a) &&    \
 336          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_SITELOCAL))
 337 #define IN6_IS_ADDR_MC_ORGLOCAL(a)      \
 338         (IN6_IS_ADDR_MULTICAST(a) &&    \
 339          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_ORGLOCAL))
 340 #define IN6_IS_ADDR_MC_GLOBAL(a)        \
 341         (IN6_IS_ADDR_MULTICAST(a) &&    \
 342          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_GLOBAL))
 343 #else
 344 #define IN6_IS_ADDR_MC_NODELOCAL(a)     \
 345         (IN6_IS_ADDR_MULTICAST(a) &&    \
 346          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_NODELOCAL))
 347 #define IN6_IS_ADDR_MC_LINKLOCAL(a)     \
 348         (IN6_IS_ADDR_MULTICAST(a) &&    \
 349          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_LINKLOCAL))
 350 #define IN6_IS_ADDR_MC_SITELOCAL(a)     \
 351         (IN6_IS_ADDR_MULTICAST(a) &&    \
 352          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_SITELOCAL))
 353 #define IN6_IS_ADDR_MC_ORGLOCAL(a)      \
 354         (IN6_IS_ADDR_MULTICAST(a) &&    \
 355          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_ORGLOCAL))
 356 #define IN6_IS_ADDR_MC_GLOBAL(a)        \
 357         (IN6_IS_ADDR_MULTICAST(a) &&    \
 358          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_GLOBAL))
 359 #endif
 360
 361 #ifdef KERNEL   /*nonstandard*/
 362 /*
 363  * KAME Scope
 364  */
 365 #define IN6_IS_SCOPE_LINKLOCAL(a)       \
 366         ((IN6_IS_ADDR_LINKLOCAL(a)) ||  \
 367          (IN6_IS_ADDR_MC_LINKLOCAL(a)))
 368
 369 #define IFA6_IS_DEPRECATED(a) \
 370         ((a)->ia6_lifetime.ia6t_preferred != 0 && \
 371          (a)->ia6_lifetime.ia6t_preferred < time_second)
 372 #define IFA6_IS_INVALID(a) \
 373         ((a)->ia6_lifetime.ia6t_expire != 0 && \
 374          (a)->ia6_lifetime.ia6t_expire < time_second)
 375 #endif /* _KERNEL */
 376
 377 /*
 378  * IP6 route structure
 379  */
 380 #ifdef __APPLE_API_PRIVATE
 381 #if !defined(_XOPEN_SOURCE)
 382 struct route_in6 {
 383         struct  rtentry *ro_rt;
 384         struct  sockaddr_in6 ro_dst;
 385 };
 386 #endif
 387 #endif /* __APPLE_API_PRIVATE */
 388
 389 /*
 390  * Options for use with [gs]etsockopt at the IPV6 level.
 391  * First word of comment is data type; bool is stored in int.
 392  */
 393 /* no hdrincl */
 394 #if 0 /* the followings are relic in IPv4 and hence are disabled */
 395 #define IPV6_OPTIONS            1  /* buf/ip6_opts; set/get IP6 options */
 396 #define IPV6_RECVOPTS           5  /* bool; receive all IP6 opts w/dgram */
 397 #define IPV6_RECVRETOPTS        6  /* bool; receive IP6 opts for response */
 398 #define IPV6_RECVDSTADDR        7  /* bool; receive IP6 dst addr w/dgram */
 399 #define IPV6_RETOPTS            8  /* ip6_opts; set/get IP6 options */
 400 #endif
 401 #define IPV6_SOCKOPT_RESERVED1  3  /* reserved for future use */
 402 #define IPV6_UNICAST_HOPS       4  /* int; IP6 hops */
 403 #define IPV6_MULTICAST_IF       9  /* u_char; set/get IP6 multicast i/f  */
 404 #define IPV6_MULTICAST_HOPS     10 /* u_char; set/get IP6 multicast hops */
 405 #define IPV6_MULTICAST_LOOP     11 /* u_char; set/get IP6 multicast loopback */
 406 #define IPV6_JOIN_GROUP         12 /* ip6_mreq; join a group membership */
 407 #define IPV6_LEAVE_GROUP        13 /* ip6_mreq; leave a group membership */
 408 #define IPV6_PORTRANGE          14 /* int; range to choose for unspec port */
 409 #define ICMP6_FILTER            18 /* icmp6_filter; icmp6 filter */
 410 /* RFC2292 options */
 411 #define IPV6_PKTINFO            19 /* bool; send/recv if, src/dst addr */
 412 #define IPV6_HOPLIMIT           20 /* bool; hop limit */
 413 #define IPV6_NEXTHOP            21 /* bool; next hop addr */
 414 #define IPV6_HOPOPTS            22 /* bool; hop-by-hop option */
 415 #define IPV6_DSTOPTS            23 /* bool; destination option */
 416 #define IPV6_RTHDR              24 /* bool; routing header */
 417 #define IPV6_PKTOPTIONS         25 /* buf/cmsghdr; set/get IPv6 options */
 418
 419 #define IPV6_CHECKSUM           26 /* int; checksum offset for raw socket */
 420 #define IPV6_V6ONLY             27 /* bool; only bind INET6 at wildcard bind */
 421 #ifndef KERNEL
 422 #define IPV6_BINDV6ONLY         IPV6_V6ONLY
 423 #endif
 424
 425
 426 #if 1 /*IPSEC*/
 427 #define IPV6_IPSEC_POLICY       28 /* struct; get/set security policy */
 428 #endif
 429 #define IPV6_FAITH              29 /* bool; accept FAITH'ed connections */
 430
 431 #if 1 /*IPV6FIREWALL*/
 432 #define IPV6_FW_ADD             30 /* add a firewall rule to chain */
 433 #define IPV6_FW_DEL             31 /* delete a firewall rule from chain */
 434 #define IPV6_FW_FLUSH           32 /* flush firewall rule chain */
 435 #define IPV6_FW_ZERO            33 /* clear single/all firewall counter(s) */
 436 #define IPV6_FW_GET             34 /* get entire firewall rule chain */
 437 #endif
 438
 439 /* to define items, should talk with KAME guys first, for *BSD compatibility */
 440
 441 #define IPV6_RTHDR_LOOSE     0 /* this hop need not be a neighbor. XXX old spec */
 442 #define IPV6_RTHDR_STRICT    1 /* this hop must be a neighbor. XXX old spec */
 443 #define IPV6_RTHDR_TYPE_0    0 /* IPv6 routing header type 0 */
 444
 445 /*
 446  * Defaults and limits for options
 447  */
 448 #define IPV6_DEFAULT_MULTICAST_HOPS 1   /* normally limit m'casts to 1 hop  */
 449 #define IPV6_DEFAULT_MULTICAST_LOOP 1   /* normally hear sends if a member  */
 450
 451 /*
 452  * Argument structure for IPV6_JOIN_GROUP and IPV6_LEAVE_GROUP.
 453  */
 454 struct ipv6_mreq {
 455         struct in6_addr ipv6mr_multiaddr;
 456         unsigned int    ipv6mr_interface;
 457 };
 458
 459 /*
 460  * IPV6_PKTINFO: Packet information(RFC2292 sec 5)
 461  */
 462 struct in6_pktinfo {
 463         struct in6_addr ipi6_addr;      /* src/dst IPv6 address */
 464         unsigned int    ipi6_ifindex;   /* send/recv interface index */
 465 };
 466
 467 /*
 468  * Argument for IPV6_PORTRANGE:
 469  * - which range to search when port is unspecified at bind() or connect()
 470  */
 471 #define IPV6_PORTRANGE_DEFAULT  0       /* default range */
 472 #define IPV6_PORTRANGE_HIGH     1       /* "high" - request firewall bypass */
 473 #define IPV6_PORTRANGE_LOW      2       /* "low" - vouchsafe security */
 474
 475 #if !defined(_XOPEN_SOURCE)
 476 /*
 477  * Definitions for inet6 sysctl operations.
 478  *
 479  * Third level is protocol number.
 480  * Fourth level is desired variable within that protocol.
 481  */
 482 #define IPV6PROTO_MAXID (IPPROTO_PIM + 1)       /* don't list to IPV6PROTO_MAX */
 483
 484 #define CTL_IPV6PROTO_NAMES { \
 485         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 486         { 0, 0 }, \
 487         { "tcp6", CTLTYPE_NODE }, \
 488         { 0, 0 }, \
 489         { 0, 0 }, \
 490         { 0, 0 }, \
 491         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 492         { 0, 0 }, \
 493         { 0, 0 }, \
 494         { "udp6", CTLTYPE_NODE }, \
 495         { 0, 0 }, \
 496         { 0, 0 }, \
 497         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 498         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 499         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 500         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 501         { 0, 0 }, \
 502         { "ip6", CTLTYPE_NODE }, \
 503         { 0, 0 }, \
 504         { 0, 0 }, \
 505         { 0, 0 }, \
 506         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 507         { 0, 0 }, \
 508         { "ipsec6", CTLTYPE_NODE }, \
 509         { 0, 0 }, \
 510         { 0, 0 }, \
 511         { 0, 0 }, \
 512         { 0, 0 }, \
 513         { 0, 0 }, \
 514         { 0, 0 }, \
 515         { "icmp6", CTLTYPE_NODE }, \
 516         { 0, 0 }, \
 517         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 518         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 519         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 520         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 521         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 522         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 523         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 524         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 525         { 0, 0 }, \
 526         { 0, 0 }, \
 527         { 0, 0 }, \
 528         { "pim6", CTLTYPE_NODE }, \
 529 }
 530
 531 /*
 532  * Names for IP sysctl objects
 533  */
 534 #define IPV6CTL_FORWARDING      1       /* act as router */
 535 #define IPV6CTL_SENDREDIRECTS   2       /* may send redirects when forwarding*/
 536 #define IPV6CTL_DEFHLIM         3       /* default Hop-Limit */
 537 #ifdef notyet
 538 #define IPV6CTL_DEFMTU          4       /* default MTU */
 539 #endif
 540 #define IPV6CTL_FORWSRCRT       5       /* forward source-routed dgrams */
 541 #define IPV6CTL_STATS           6       /* stats */
 542 #define IPV6CTL_MRTSTATS        7       /* multicast forwarding stats */
 543 #define IPV6CTL_MRTPROTO        8       /* multicast routing protocol */
 544 #define IPV6CTL_MAXFRAGPACKETS  9       /* max packets reassembly queue */
 545 #define IPV6CTL_SOURCECHECK     10      /* verify source route and intf */
 546 #define IPV6CTL_SOURCECHECK_LOGINT 11   /* minimume logging interval */
 547 #define IPV6CTL_ACCEPT_RTADV    12
 548 #define IPV6CTL_KEEPFAITH       13
 549 #define IPV6CTL_LOG_INTERVAL    14
 550 #define IPV6CTL_HDRNESTLIMIT    15
 551 #define IPV6CTL_DAD_COUNT       16
 552 #define IPV6CTL_AUTO_FLOWLABEL  17
 553 #define IPV6CTL_DEFMCASTHLIM    18
 554 #define IPV6CTL_GIF_HLIM        19      /* default HLIM for gif encap packet */
 555 #define IPV6CTL_KAME_VERSION    20
 556 #define IPV6CTL_USE_DEPRECATED  21      /* use deprecated addr (RFC2462 5.5.4) */
 557 #define IPV6CTL_RR_PRUNE        22      /* walk timer for router renumbering */
 558 #if 0   /*obsolete*/
 559 #define IPV6CTL_MAPPED_ADDR     23
 560 #endif
 561 #define IPV6CTL_V6ONLY          24
 562 #define IPV6CTL_RTEXPIRE        25      /* cloned route expiration time */
 563 #define IPV6CTL_RTMINEXPIRE     26      /* min value for expiration time */
 564 #define IPV6CTL_RTMAXCACHE      27      /* trigger level for dynamic expire */
 565
 566 #define IPV6CTL_USETEMPADDR     32      /* use temporary addresses (RFC3041) */
 567 #define IPV6CTL_TEMPPLTIME      33      /* preferred lifetime for tmpaddrs */
 568 #define IPV6CTL_TEMPVLTIME      34      /* valid lifetime for tmpaddrs */
 569 #define IPV6CTL_AUTO_LINKLOCAL  35      /* automatic link-local addr assign */
 570 #define IPV6CTL_RIP6STATS       36      /* raw_ip6 stats */
 571
 572 /* New entries should be added here from current IPV6CTL_MAXID value. */
 573 /* to define items, should talk with KAME guys first, for *BSD compatibility */
 574 #define IPV6CTL_MAXID           37
 575
 576 #endif /* !_XOPEN_SOURCE */
 577
 578 /*
 579  * Redefinition of mbuf flags
 580  */
 581 #define M_AUTHIPHDR     M_PROTO2
 582 #define M_DECRYPTED     M_PROTO3
 583 #define M_LOOP          M_PROTO4
 584 #define M_AUTHIPDGM     M_PROTO5
 585
 586 #ifdef KERNEL
 587 #ifdef __APPLE_API_PRIVATE
 588 struct cmsghdr;
 589 struct mbuf;
 590 struct ifnet;
 591 struct in6_aliasreq;
 592
 593 int     in6_cksum __P((struct mbuf *, u_int8_t, u_int32_t, u_int32_t));
 594 int     in6_localaddr __P((struct in6_addr *));
 595 int     in6_addrscope __P((struct in6_addr *));
 596 struct  in6_ifaddr *in6_ifawithscope __P((struct ifnet *, struct in6_addr *));
 597 struct  in6_ifaddr *in6_ifawithifp __P((struct ifnet *, struct in6_addr *));
 598 extern void in6_if_up __P((struct ifnet *, struct in6_aliasreq *));
 599 struct sockaddr;
 600
 601 void    in6_sin6_2_sin __P((struct sockaddr_in *sin,
 602                             struct sockaddr_in6 *sin6));
 603 void    in6_sin_2_v4mapsin6 __P((struct sockaddr_in *sin,
 604                                  struct sockaddr_in6 *sin6));
 605 void    in6_sin6_2_sin_in_sock __P((struct sockaddr *nam));
 606 void    in6_sin_2_v4mapsin6_in_sock __P((struct sockaddr **nam));
 607
 608 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
 609 #define sin6tosa(sin6)  ((struct sockaddr *)(sin6))
 610 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
 611 #endif /* __APPLE_API_PRIVATE */
 612 #endif /* KERNEL */
 613
 614 __BEGIN_DECLS
 615 struct cmsghdr;
 616
 617 extern int inet6_option_space __P((int));
 618 extern int inet6_option_init __P((void *, struct cmsghdr **, int));
 619 extern int inet6_option_append __P((struct cmsghdr *, const u_int8_t *,
 620         int, int));
 621 extern u_int8_t *inet6_option_alloc __P((struct cmsghdr *, int, int, int));
 622 extern int inet6_option_next __P((const struct cmsghdr *, u_int8_t **));
 623 extern int inet6_option_find __P((const struct cmsghdr *, u_int8_t **, int));
 624
 625 extern size_t inet6_rthdr_space __P((int, int));
 626 extern struct cmsghdr *inet6_rthdr_init __P((void *, int));
 627 extern int inet6_rthdr_add __P((struct cmsghdr *, const struct in6_addr *,
 628                 unsigned int));
 629 extern int inet6_rthdr_lasthop __P((struct cmsghdr *, unsigned int));
 630 #if 0 /* not implemented yet */
 631 extern int inet6_rthdr_reverse __P((const struct cmsghdr *, struct cmsghdr *));
 632 #endif
 633 extern int inet6_rthdr_segments __P((const struct cmsghdr *));
 634 extern struct in6_addr *inet6_rthdr_getaddr __P((struct cmsghdr *, int));
 635 extern int inet6_rthdr_getflags __P((const struct cmsghdr *, int));
 636
 637 extern int inet6_opt_init __P((void *, size_t));
 638 extern int inet6_opt_append __P((void *, size_t, int, u_int8_t,
 639                                  size_t, u_int8_t, void **));
 640 extern int inet6_opt_finish __P((void *, size_t, int));
 641 extern int inet6_opt_set_val __P((void *, size_t, void *, int));
 642
 643 extern int inet6_opt_next __P((void *, size_t, int, u_int8_t *,
 644                                size_t *, void **));
 645 extern int inet6_opt_find __P((void *, size_t, int, u_int8_t,
 646                           size_t *, void **));
 647 extern int inet6_opt_get_val __P((void *, size_t, void *, int));
 648 extern size_t inet6_rth_space __P((int, int));
 649 extern void *inet6_rth_init __P((void *, int, int, int));
 650 extern int inet6_rth_add __P((void *, const struct in6_addr *));
 651 extern int inet6_rth_reverse __P((const void *, void *));
 652 extern int inet6_rth_segments __P((const void *));
 653 extern struct in6_addr *inet6_rth_getaddr __P((const void *, int));
 654 __END_DECLS
 655
 656 #endif /* !_NETINET6_IN6_H_ */