bsd/netinet6/in6.h

   1 /*
   2  * Copyright (c) 2008-2012 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 /*      $FreeBSD: src/sys/netinet6/in6.h,v 1.7.2.4 2001/07/04 09:45:23 ume Exp $        */
  30 /*      $KAME: in6.h,v 1.89 2001/05/27 13:28:35 itojun Exp $    */
  31
  32 /*
  33  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
  34  * All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  * 1. Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  * 2. Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in the
  43  *    documentation and/or other materials provided with the distribution.
  44  * 3. Neither the name of the project nor the names of its contributors
  45  *    may be used to endorse or promote products derived from this software
  46  *    without specific prior written permission.
  47  *
  48  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  58  * SUCH DAMAGE.
  59  */
  60
  61 /*
  62  * Copyright (c) 1982, 1986, 1990, 1993
  63  *      The Regents of the University of California.  All rights reserved.
  64  *
  65  * Redistribution and use in source and binary forms, with or without
  66  * modification, are permitted provided that the following conditions
  67  * are met:
  68  * 1. Redistributions of source code must retain the above copyright
  69  *    notice, this list of conditions and the following disclaimer.
  70  * 2. Redistributions in binary form must reproduce the above copyright
  71  *    notice, this list of conditions and the following disclaimer in the
  72  *    documentation and/or other materials provided with the distribution.
  73  * 3. All advertising materials mentioning features or use of this software
  74  *    must display the following acknowledgement:
  75  *      This product includes software developed by the University of
  76  *      California, Berkeley and its contributors.
  77  * 4. Neither the name of the University nor the names of its contributors
  78  *    may be used to endorse or promote products derived from this software
  79  *    without specific prior written permission.
  80  *
  81  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  82  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  83  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  84  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  85  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  86  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  87  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  88  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  89  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  90  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  91  * SUCH DAMAGE.
  92  *
  93  *      @(#)in.h        8.3 (Berkeley) 1/3/94
  94  */
  95
  96 #ifndef __KAME_NETINET_IN_H_INCLUDED_
  97 #error "do not include netinet6/in6.h directly, include netinet/in.h.  see RFC2553"
  98 #endif
  99
 100 #ifndef _NETINET6_IN6_H_
 101 #define _NETINET6_IN6_H_
 102 #include <sys/appleapiopts.h>
 103 #include <sys/_types.h>
 104
 105
 106 #ifndef _SA_FAMILY_T
 107 #define _SA_FAMILY_T
 108 typedef __uint8_t               sa_family_t;
 109 #endif
 110
 111 /*
 112  * Identification of the network protocol stack
 113  * for *BSD-current/release: http://www.kame.net/dev/cvsweb.cgi/kame/COVERAGE
 114  * has the table of implementation/integration differences.
 115  */
 116 #define __KAME__
 117 #define __KAME_VERSION          "2009/apple-darwin"
 118
 119 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 120 /*
 121  * Local port number conventions:
 122  *
 123  * Ports < IPPORT_RESERVED are reserved for privileged processes (e.g. root),
 124  * unless a kernel is compiled with IPNOPRIVPORTS defined.
 125  *
 126  * When a user does a bind(2) or connect(2) with a port number of zero,
 127  * a non-conflicting local port address is chosen.
 128  *
 129  * The default range is IPPORT_ANONMIN to IPPORT_ANONMAX, although
 130  * that is settable by sysctl(3); net.inet.ip.anonportmin and
 131  * net.inet.ip.anonportmax respectively.
 132  *
 133  * A user may set the IPPROTO_IP option IP_PORTRANGE to change this
 134  * default assignment range.
 135  *
 136  * The value IP_PORTRANGE_DEFAULT causes the default behavior.
 137  *
 138  * The value IP_PORTRANGE_HIGH is the same as IP_PORTRANGE_DEFAULT,
 139  * and exists only for FreeBSD compatibility purposes.
 140  *
 141  * The value IP_PORTRANGE_LOW changes the range to the "low" are
 142  * that is (by convention) restricted to privileged processes.
 143  * This convention is based on "vouchsafe" principles only.
 144  * It is only secure if you trust the remote host to restrict these ports.
 145  * The range is IPPORT_RESERVEDMIN to IPPORT_RESERVEDMAX.
 146  */
 147
 148 #define IPV6PORT_RESERVED       1024
 149 #define IPV6PORT_ANONMIN        49152
 150 #define IPV6PORT_ANONMAX        65535
 151 #define IPV6PORT_RESERVEDMIN    600
 152 #define IPV6PORT_RESERVEDMAX    (IPV6PORT_RESERVED-1)
 153 #endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
 154
 155 /*
 156  * IPv6 address
 157  */
 158 struct in6_addr {
 159         union {
 160                 __uint8_t   __u6_addr8[16];
 161                 __uint16_t  __u6_addr16[8];
 162                 __uint32_t  __u6_addr32[4];
 163         } __u6_addr;                    /* 128-bit IP6 address */
 164 };
 165
 166 #define s6_addr   __u6_addr.__u6_addr8
 167 #ifdef KERNEL   /*XXX nonstandard*/
 168 #define s6_addr8  __u6_addr.__u6_addr8
 169 #define s6_addr16 __u6_addr.__u6_addr16
 170 #define s6_addr32 __u6_addr.__u6_addr32
 171 #endif
 172
 173 #define INET6_ADDRSTRLEN        46
 174
 175 /*
 176  * Socket address for IPv6
 177  */
 178 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 179 #define SIN6_LEN
 180 #endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
 181 struct sockaddr_in6 {
 182         __uint8_t       sin6_len;       /* length of this struct(sa_family_t)*/
 183         sa_family_t     sin6_family;    /* AF_INET6 (sa_family_t) */
 184         in_port_t       sin6_port;      /* Transport layer port # (in_port_t)*/
 185         __uint32_t      sin6_flowinfo;  /* IP6 flow information */
 186         struct in6_addr sin6_addr;      /* IP6 address */
 187         __uint32_t      sin6_scope_id;  /* scope zone index */
 188 };
 189
 190 #ifdef KERNEL   /*XXX nonstandard*/
 191 /*
 192  * Local definition for masks
 193  */
 194 #define IN6MASK0        {{{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }}}
 195 #define IN6MASK7        {{{ 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 196                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
 197 #define IN6MASK16       {{{ 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 198                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
 199 #define IN6MASK32       {{{ 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, \
 200                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
 201 #define IN6MASK64       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
 202                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
 203 #define IN6MASK96       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
 204                             0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00 }}}
 205 #define IN6MASK128      {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
 206                             0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}}
 207 #endif
 208
 209 #ifdef KERNEL_PRIVATE
 210 extern const struct sockaddr_in6 sa6_any;
 211
 212 extern const struct in6_addr in6mask0;
 213 extern const struct in6_addr in6mask7;
 214 extern const struct in6_addr in6mask16;
 215 extern const struct in6_addr in6mask32;
 216 extern const struct in6_addr in6mask64;
 217 extern const struct in6_addr in6mask96;
 218 extern const struct in6_addr in6mask128;
 219
 220 #define SIN6(s)         ((struct sockaddr_in6 *)(void *)s)
 221 #define satosin6(sa)    SIN6(sa)
 222 #define sin6tosa(sin6)  ((struct sockaddr *)(void *)(sin6))
 223 #endif /* KERNEL_PRIVATE */
 224
 225 #ifdef KERNEL   /*XXX nonstandard*/
 226 /*
 227  * Macros started with IPV6_ADDR is KAME local
 228  */
 229 #if BYTE_ORDER == BIG_ENDIAN
 230 #define IPV6_ADDR_INT32_ONE     1
 231 #define IPV6_ADDR_INT32_TWO     2
 232 #define IPV6_ADDR_INT32_MNL     0xff010000
 233 #define IPV6_ADDR_INT32_MLL     0xff020000
 234 #define IPV6_ADDR_INT32_SMP     0x0000ffff
 235 #define IPV6_ADDR_INT16_ULL     0xfe80
 236 #define IPV6_ADDR_INT16_USL     0xfec0
 237 #define IPV6_ADDR_INT16_MLL     0xff02
 238 #elif BYTE_ORDER == LITTLE_ENDIAN
 239 #define IPV6_ADDR_INT32_ONE     0x01000000
 240 #define IPV6_ADDR_INT32_TWO     0x02000000
 241 #define IPV6_ADDR_INT32_MNL     0x000001ff
 242 #define IPV6_ADDR_INT32_MLL     0x000002ff
 243 #define IPV6_ADDR_INT32_SMP     0xffff0000
 244 #define IPV6_ADDR_INT16_ULL     0x80fe
 245 #define IPV6_ADDR_INT16_USL     0xc0fe
 246 #define IPV6_ADDR_INT16_MLL     0x02ff
 247 #endif
 248 #endif
 249
 250 /*
 251  * Definition of some useful macros to handle IP6 addresses
 252  */
 253 #define IN6ADDR_ANY_INIT \
 254         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 255             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
 256 #define IN6ADDR_LOOPBACK_INIT \
 257         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 258             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 259 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 260 #define IN6ADDR_NODELOCAL_ALLNODES_INIT \
 261         {{{ 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 262             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 263 #define IN6ADDR_INTFACELOCAL_ALLNODES_INIT \
 264         {{{ 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 265             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 266 #define IN6ADDR_LINKLOCAL_ALLNODES_INIT \
 267         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 268             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 269 #define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \
 270         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 271             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}}
 272 #define IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT \
 273         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 274             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x16 }}}
 275 #define IN6ADDR_V4MAPPED_INIT \
 276         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 277             0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00 }}}
 278 #endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
 279
 280 extern const struct in6_addr in6addr_any;
 281 extern const struct in6_addr in6addr_loopback;
 282 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 283 extern const struct in6_addr in6addr_nodelocal_allnodes;
 284 extern const struct in6_addr in6addr_linklocal_allnodes;
 285 extern const struct in6_addr in6addr_linklocal_allrouters;
 286 extern const struct in6_addr in6addr_linklocal_allv2routers;
 287 #endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
 288
 289 /*
 290  * Equality
 291  * NOTE: Some of kernel programming environment (for example, openbsd/sparc)
 292  * does not supply memcmp().  For userland memcmp() is preferred as it is
 293  * in ANSI standard.
 294  */
 295 #ifdef KERNEL
 296 #define IN6_ARE_ADDR_EQUAL(a, b)                        \
 297     (bcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
 298 #else
 299 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 300 #define IN6_ARE_ADDR_EQUAL(a, b)                        \
 301     (memcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
 302 #endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
 303 #endif
 304
 305 #ifdef KERNEL                   /* non standard */
 306 /* see if two addresses are equal in a scope-conscious manner. */
 307 #define SA6_ARE_ADDR_EQUAL(a, b) \
 308         (((a)->sin6_scope_id == 0 || (b)->sin6_scope_id == 0 || \
 309           ((a)->sin6_scope_id == (b)->sin6_scope_id)) && \
 310          (bcmp(&(a)->sin6_addr, &(b)->sin6_addr, sizeof(struct in6_addr)) == 0))
 311 #endif
 312
 313 /*
 314  * Unspecified
 315  */
 316 #define IN6_IS_ADDR_UNSPECIFIED(a)      \
 317         ((*(const __uint32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
 318          (*(const __uint32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
 319          (*(const __uint32_t *)(const void *)(&(a)->s6_addr[8]) == 0) && \
 320          (*(const __uint32_t *)(const void *)(&(a)->s6_addr[12]) == 0))
 321
 322 /*
 323  * Loopback
 324  */
 325 #define IN6_IS_ADDR_LOOPBACK(a)         \
 326         ((*(const __uint32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
 327          (*(const __uint32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
 328          (*(const __uint32_t *)(const void *)(&(a)->s6_addr[8]) == 0) && \
 329          (*(const __uint32_t *)(const void *)(&(a)->s6_addr[12]) == ntohl(1)))
 330
 331 /*
 332  * IPv4 compatible
 333  */
 334 #define IN6_IS_ADDR_V4COMPAT(a)         \
 335         ((*(const __uint32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
 336          (*(const __uint32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
 337          (*(const __uint32_t *)(const void *)(&(a)->s6_addr[8]) == 0) && \
 338          (*(const __uint32_t *)(const void *)(&(a)->s6_addr[12]) != 0) && \
 339          (*(const __uint32_t *)(const void *)(&(a)->s6_addr[12]) != ntohl(1)))
 340
 341 /*
 342  * Mapped
 343  */
 344 #define IN6_IS_ADDR_V4MAPPED(a)               \
 345         ((*(const __uint32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
 346          (*(const __uint32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
 347          (*(const __uint32_t *)(const void *)(&(a)->s6_addr[8]) == ntohl(0x0000ffff)))
 348
 349 /*
 350  * 6to4
 351  */
 352 #define IN6_IS_ADDR_6TO4(x)     (ntohs((x)->s6_addr16[0]) == 0x2002)
 353
 354 /*
 355  * KAME Scope Values
 356  */
 357
 358 #ifdef KERNEL   /*XXX nonstandard*/
 359 #define IPV6_ADDR_SCOPE_NODELOCAL       0x01
 360 #define IPV6_ADDR_SCOPE_INTFACELOCAL    0x01
 361 #define IPV6_ADDR_SCOPE_LINKLOCAL       0x02
 362 #define IPV6_ADDR_SCOPE_SITELOCAL       0x05
 363 #define IPV6_ADDR_SCOPE_ORGLOCAL        0x08    /* just used in this file */
 364 #define IPV6_ADDR_SCOPE_GLOBAL          0x0e
 365 #else
 366 #define __IPV6_ADDR_SCOPE_NODELOCAL     0x01
 367 #define __IPV6_ADDR_SCOPE_INTFACELOCAL  0x01
 368 #define __IPV6_ADDR_SCOPE_LINKLOCAL     0x02
 369 #define __IPV6_ADDR_SCOPE_SITELOCAL     0x05
 370 #define __IPV6_ADDR_SCOPE_ORGLOCAL      0x08    /* just used in this file */
 371 #define __IPV6_ADDR_SCOPE_GLOBAL        0x0e
 372 #endif
 373
 374 /*
 375  * Unicast Scope
 376  * Note that we must check topmost 10 bits only, not 16 bits (see RFC2373).
 377  */
 378 #define IN6_IS_ADDR_LINKLOCAL(a)        \
 379         (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0x80))
 380 #define IN6_IS_ADDR_SITELOCAL(a)        \
 381         (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0xc0))
 382
 383 /*
 384  * Multicast
 385  */
 386 #define IN6_IS_ADDR_MULTICAST(a)        ((a)->s6_addr[0] == 0xff)
 387
 388 /*
 389  * Unique Local IPv6 Unicast Addresses (per RFC 4193)
 390  */
 391 #define IN6_IS_ADDR_UNIQUE_LOCAL(a)     (((a)->s6_addr[0] == 0xfc) || ((a)->s6_addr[0] == 0xfd))
 392
 393 #ifdef KERNEL   /*XXX nonstandard*/
 394 #define IPV6_ADDR_MC_SCOPE(a)           ((a)->s6_addr[1] & 0x0f)
 395 #else
 396 #define __IPV6_ADDR_MC_SCOPE(a)         ((a)->s6_addr[1] & 0x0f)
 397 #endif
 398
 399 /*
 400  * Multicast Scope
 401  */
 402 #ifdef KERNEL   /*refers nonstandard items */
 403 #define IN6_IS_ADDR_MC_NODELOCAL(a)     \
 404         (IN6_IS_ADDR_MULTICAST(a) &&    \
 405          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_NODELOCAL))
 406 #define IN6_IS_ADDR_MC_INTFACELOCAL(a)  \
 407         (IN6_IS_ADDR_MULTICAST(a) &&    \
 408         (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_INTFACELOCAL))
 409 #define IN6_IS_ADDR_MC_LINKLOCAL(a)     \
 410         (IN6_IS_ADDR_MULTICAST(a) &&    \
 411          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_LINKLOCAL))
 412 #define IN6_IS_ADDR_MC_SITELOCAL(a)     \
 413         (IN6_IS_ADDR_MULTICAST(a) &&    \
 414          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_SITELOCAL))
 415 #define IN6_IS_ADDR_MC_ORGLOCAL(a)      \
 416         (IN6_IS_ADDR_MULTICAST(a) &&    \
 417          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_ORGLOCAL))
 418 #define IN6_IS_ADDR_MC_GLOBAL(a)        \
 419         (IN6_IS_ADDR_MULTICAST(a) &&    \
 420          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_GLOBAL))
 421 #else
 422 #define IN6_IS_ADDR_MC_NODELOCAL(a)     \
 423         (IN6_IS_ADDR_MULTICAST(a) &&    \
 424          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_NODELOCAL))
 425 #define IN6_IS_ADDR_MC_LINKLOCAL(a)     \
 426         (IN6_IS_ADDR_MULTICAST(a) &&    \
 427          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_LINKLOCAL))
 428 #define IN6_IS_ADDR_MC_SITELOCAL(a)     \
 429         (IN6_IS_ADDR_MULTICAST(a) &&    \
 430          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_SITELOCAL))
 431 #define IN6_IS_ADDR_MC_ORGLOCAL(a)      \
 432         (IN6_IS_ADDR_MULTICAST(a) &&    \
 433          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_ORGLOCAL))
 434 #define IN6_IS_ADDR_MC_GLOBAL(a)        \
 435         (IN6_IS_ADDR_MULTICAST(a) &&    \
 436          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_GLOBAL))
 437 #endif
 438
 439 #ifdef KERNEL   /*nonstandard*/
 440 /*
 441  * KAME Scope
 442  */
 443 #define IN6_IS_SCOPE_LINKLOCAL(a)       \
 444         ((IN6_IS_ADDR_LINKLOCAL(a)) ||  \
 445          (IN6_IS_ADDR_MC_LINKLOCAL(a)))
 446
 447 #define IN6_IS_SCOPE_EMBED(a)                   \
 448         ((IN6_IS_ADDR_LINKLOCAL(a)) ||          \
 449         (IN6_IS_ADDR_MC_LINKLOCAL(a)) ||        \
 450         (IN6_IS_ADDR_MC_INTFACELOCAL(a)))
 451
 452 #define IFA6_IS_DEPRECATED(a) \
 453         ((a)->ia6_lifetime.ia6t_preferred != 0 && \
 454          (a)->ia6_lifetime.ia6t_preferred < timenow.tv_sec)
 455 #define IFA6_IS_INVALID(a) \
 456         ((a)->ia6_lifetime.ia6t_expire != 0 && \
 457          (a)->ia6_lifetime.ia6t_expire < timenow.tv_sec)
 458 #endif /* KERNEL */
 459
 460 /*
 461  * IP6 route structure
 462  */
 463 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 464 #ifdef PRIVATE
 465 struct route_in6 {
 466         /*
 467          * N.B: struct route_in6 must begin with ro_rt and ro_flags
 468          * because the code does some casts of a 'struct route_in6 *'
 469          * to a 'struct route *'.
 470          */
 471         struct rtentry  *ro_rt;
 472         __uint32_t      ro_flags;       /* route flags */
 473         struct sockaddr_in6 ro_dst;
 474 };
 475 #endif /* PRIVATE */
 476 #endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
 477
 478 /*
 479  * Options for use with [gs]etsockopt at the IPV6 level.
 480  * First word of comment is data type; bool is stored in int.
 481  */
 482 /* no hdrincl */
 483 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 484 /*
 485  * RFC 3542 define the following socket options in a manner incompatible
 486  * with RFC 2292:
 487  *   IPV6_PKTINFO
 488  *   IPV6_HOPLIMIT
 489  *   IPV6_NEXTHOP
 490  *   IPV6_HOPOPTS
 491  *   IPV6_DSTOPTS
 492  *   IPV6_RTHDR
 493  *
 494  * To use the new IPv6 Sockets options introduced by RFC 3542
 495  * the constant __APPLE_USE_RFC_3542 must be defined before
 496  * including <netinet/in.h>
 497  *
 498  * To use the old IPv6 Sockets options from RFC 2292
 499  * the constant __APPLE_USE_RFC_2292 must be defined before
 500  * including <netinet/in.h>
 501  *
 502  * Note that eventually RFC 3542 is going to be the
 503  * default and RFC 2292 will be obsolete.
 504  */
 505 #ifdef XNU_KERNEL_PRIVATE
 506 #define __APPLE_USE_RFC_3542 1
 507 #endif /* XNU_KERNEL_PRIVATE */
 508
 509 #if defined(__APPLE_USE_RFC_3542) && defined(__APPLE_USE_RFC_2292)
 510 #error "__APPLE_USE_RFC_3542 and __APPLE_USE_RFC_2292 cannot be both defined"
 511 #endif
 512
 513 #if 0 /* the followings are relic in IPv4 and hence are disabled */
 514 #define IPV6_OPTIONS            1  /* buf/ip6_opts; set/get IP6 options */
 515 #define IPV6_RECVOPTS           5  /* bool; receive all IP6 opts w/dgram */
 516 #define IPV6_RECVRETOPTS        6  /* bool; receive IP6 opts for response */
 517 #define IPV6_RECVDSTADDR        7  /* bool; receive IP6 dst addr w/dgram */
 518 #define IPV6_RETOPTS            8  /* ip6_opts; set/get IP6 options */
 519 #endif /* 0 */
 520 #define IPV6_SOCKOPT_RESERVED1  3  /* reserved for future use */
 521 #endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
 522 #define IPV6_UNICAST_HOPS       4  /* int; IP6 hops */
 523 #define IPV6_MULTICAST_IF       9  /* __uint8_t; set/get IP6 multicast i/f  */
 524 #define IPV6_MULTICAST_HOPS     10 /* __uint8_t; set/get IP6 multicast hops */
 525 #define IPV6_MULTICAST_LOOP     11 /* __uint8_t; set/get IP6 mcast loopback */
 526 #define IPV6_JOIN_GROUP         12 /* ip6_mreq; join a group membership */
 527 #define IPV6_LEAVE_GROUP        13 /* ip6_mreq; leave a group membership */
 528
 529 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 530 #define IPV6_PORTRANGE          14 /* int; range to choose for unspec port */
 531 #define ICMP6_FILTER            18 /* icmp6_filter; icmp6 filter */
 532 #define IPV6_2292PKTINFO        19 /* bool; send/recv if, src/dst addr */
 533 #define IPV6_2292HOPLIMIT       20 /* bool; hop limit */
 534 #define IPV6_2292NEXTHOP        21 /* bool; next hop addr */
 535 #define IPV6_2292HOPOPTS        22 /* bool; hop-by-hop option */
 536 #define IPV6_2292DSTOPTS        23 /* bool; destinaion option */
 537 #define IPV6_2292RTHDR          24 /* ip6_rthdr: routing header */
 538 #define IPV6_2292PKTOPTIONS     25 /* buf/cmsghdr; set/get IPv6 options */
 539                                    /* obsoleted by RFC3542 */
 540
 541 #ifdef __APPLE_USE_RFC_2292
 542 #define IPV6_PKTINFO        IPV6_2292PKTINFO
 543 #define IPV6_HOPLIMIT       IPV6_2292HOPLIMIT
 544 #define IPV6_NEXTHOP        IPV6_2292NEXTHOP
 545 #define IPV6_HOPOPTS        IPV6_2292HOPOPTS
 546 #define IPV6_DSTOPTS        IPV6_2292DSTOPTS
 547 #define IPV6_RTHDR          IPV6_2292RTHDR
 548 #define IPV6_PKTOPTIONS     IPV6_2292PKTOPTIONS
 549 #endif /* __APPLE_USE_RFC_2292 */
 550
 551 #define IPV6_CHECKSUM           26 /* int; checksum offset for raw socket */
 552 #endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
 553 #define IPV6_V6ONLY             27 /* bool; only bind INET6 at wildcard bind */
 554 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 555 #ifndef KERNEL
 556 #define IPV6_BINDV6ONLY         IPV6_V6ONLY
 557 #endif /* KERNEL */
 558
 559
 560 #if 1 /*IPSEC*/
 561 #define IPV6_IPSEC_POLICY       28 /* struct; get/set security policy */
 562 #endif /* 1 */
 563 #define IPV6_FAITH              29 /* deprecated */
 564
 565 #if 1 /*IPV6FIREWALL*/
 566 #define IPV6_FW_ADD             30 /* add a firewall rule to chain */
 567 #define IPV6_FW_DEL             31 /* delete a firewall rule from chain */
 568 #define IPV6_FW_FLUSH           32 /* flush firewall rule chain */
 569 #define IPV6_FW_ZERO            33 /* clear single/all firewall counter(s) */
 570 #define IPV6_FW_GET             34 /* get entire firewall rule chain */
 571 #endif /* 1 */
 572
 573 /* APPLE: NOTE the value of those 2 options is kept unchanged from
 574  *        previous version of darwin/OS X for binary compatibility reasons
 575  *        and differ from FreeBSD (values 57 and 61). See below.
 576  */
 577 #define IPV6_RECVTCLASS         35 /* bool; recv traffic class values */
 578 #define IPV6_TCLASS             36 /* int; send traffic class value */
 579
 580 #ifdef __APPLE_USE_RFC_3542
 581 /* new socket options introduced in RFC3542 */
 582 #define IPV6_RTHDRDSTOPTS       57 /* ip6_dest; send dst option before rthdr
 583                                     * APPLE: Value purposely different than FreeBSD (35) to avoid
 584                                     * collision with definition of IPV6_RECVTCLASS in previous
 585                                     * darwin implementations */
 586
 587 #define IPV6_RECVPKTINFO        61 /* bool; recv if, dst addr
 588                                     * APPLE: Value purposely different than FreeBSD (36) to avoid
 589                                     * collision with definition of IPV6_TCLASS in previous
 590                                     * darwin implementations */
 591
 592 #define IPV6_RECVHOPLIMIT       37 /* bool; recv hop limit */
 593 #define IPV6_RECVRTHDR          38 /* bool; recv routing header */
 594 #define IPV6_RECVHOPOPTS        39 /* bool; recv hop-by-hop option */
 595 #define IPV6_RECVDSTOPTS        40 /* bool; recv dst option after rthdr */
 596 #ifdef KERNEL
 597 #define IPV6_RECVRTHDRDSTOPTS   41 /* bool; recv dst option before rthdr */
 598 #endif
 599
 600 #define IPV6_USE_MIN_MTU        42 /* bool; send packets at the minimum MTU */
 601 #define IPV6_RECVPATHMTU        43 /* bool; notify an according MTU */
 602
 603 #define IPV6_PATHMTU            44 /* mtuinfo; get the current path MTU (sopt),
 604                                       4 bytes int; MTU notification (cmsg) */
 605 #if 0 /*obsoleted during 2292bis -> 3542*/
 606 #define IPV6_REACHCONF          45 /* no data; ND reachability confirm
 607                                       (cmsg only/not in of RFC3542) */
 608 #endif
 609 /* more new socket options introduced in RFC3542 */
 610 #define IPV6_3542PKTINFO        46 /* in6_pktinfo; send if, src addr */
 611 #define IPV6_3542HOPLIMIT       47 /* int; send hop limit */
 612 #define IPV6_3542NEXTHOP        48 /* sockaddr; next hop addr */
 613 #define IPV6_3542HOPOPTS        49 /* ip6_hbh; send hop-by-hop option */
 614 #define IPV6_3542DSTOPTS        50 /* ip6_dest; send dst option befor rthdr */
 615 #define IPV6_3542RTHDR          51 /* ip6_rthdr; send routing header */
 616
 617 #define IPV6_PKTINFO        IPV6_3542PKTINFO
 618 #define IPV6_HOPLIMIT       IPV6_3542HOPLIMIT
 619 #define IPV6_NEXTHOP        IPV6_3542NEXTHOP
 620 #define IPV6_HOPOPTS        IPV6_3542HOPOPTS
 621 #define IPV6_DSTOPTS        IPV6_3542DSTOPTS
 622 #define IPV6_RTHDR          IPV6_3542RTHDR
 623
 624 #define IPV6_AUTOFLOWLABEL      59 /* bool; attach flowlabel automagically */
 625
 626 #define IPV6_DONTFRAG           62 /* bool; disable IPv6 fragmentation */
 627
 628 #define IPV6_PREFER_TEMPADDR    63 /* int; prefer temporary addresses as
 629                                     * the source address.
 630                                     */
 631
 632 /*
 633  * The following option is private; do not use it from user applications.
 634  * It is deliberately defined to the same value as IP_MSFILTER.
 635  */
 636 #define IPV6_MSFILTER           74 /* struct __msfilterreq;
 637                                     * set/get multicast source filter list.
 638                                     */
 639 #endif /* __APPLE_USE_RFC_3542 */
 640
 641 #define IPV6_BOUND_IF           125 /* int; set/get bound interface */
 642
 643 #ifdef PRIVATE
 644 #define IPV6_NO_IFT_CELLULAR    6969 /* for internal use only */
 645 #define IPV6_OUT_IF             9696 /* for internal use only */
 646 #endif /* PRIVATE */
 647
 648 /* to define items, should talk with KAME guys first, for *BSD compatibility */
 649
 650 #define IPV6_RTHDR_LOOSE     0 /* this hop need not be a neighbor. XXX old spec */
 651 #define IPV6_RTHDR_STRICT    1 /* this hop must be a neighbor. XXX old spec */
 652 #define IPV6_RTHDR_TYPE_0    0 /* IPv6 routing header type 0 */
 653
 654 /*
 655  * Defaults and limits for options
 656  */
 657 #define IPV6_DEFAULT_MULTICAST_HOPS 1   /* normally limit m'casts to 1 hop  */
 658 #define IPV6_DEFAULT_MULTICAST_LOOP 1   /* normally hear sends if a member  */
 659
 660 /*
 661  * The im6o_membership vector for each socket is now dynamically allocated at
 662  * run-time, bounded by USHRT_MAX, and is reallocated when needed, sized
 663  * according to a power-of-two increment.
 664  */
 665 #define IPV6_MIN_MEMBERSHIPS    31
 666 #define IPV6_MAX_MEMBERSHIPS    4095
 667
 668 /*
 669  * Default resource limits for IPv6 multicast source filtering.
 670  * These may be modified by sysctl.
 671  */
 672 #define IPV6_MAX_GROUP_SRC_FILTER       512     /* sources per group */
 673 #define IPV6_MAX_SOCK_SRC_FILTER        128     /* sources per socket/group */
 674
 675 /*
 676  * Argument structure for IPV6_JOIN_GROUP and IPV6_LEAVE_GROUP.
 677  */
 678 struct ipv6_mreq {
 679         struct in6_addr ipv6mr_multiaddr;
 680         unsigned int    ipv6mr_interface;
 681 };
 682
 683 /*
 684  * IPV6_2292PKTINFO: Packet information(RFC2292 sec 5)
 685  */
 686 struct in6_pktinfo {
 687         struct in6_addr ipi6_addr;      /* src/dst IPv6 address */
 688         unsigned int    ipi6_ifindex;   /* send/recv interface index */
 689 };
 690
 691 /*
 692  * Control structure for IPV6_RECVPATHMTU socket option.
 693  */
 694 struct ip6_mtuinfo {
 695         struct sockaddr_in6 ip6m_addr;  /* or sockaddr_storage? */
 696         uint32_t ip6m_mtu;
 697 };
 698
 699 /*
 700  * Argument for IPV6_PORTRANGE:
 701  * - which range to search when port is unspecified at bind() or connect()
 702  */
 703 #define IPV6_PORTRANGE_DEFAULT  0       /* default range */
 704 #define IPV6_PORTRANGE_HIGH     1       /* "high" - request firewall bypass */
 705 #define IPV6_PORTRANGE_LOW      2       /* "low" - vouchsafe security */
 706
 707 /*
 708  * Definitions for inet6 sysctl operations.
 709  *
 710  * Third level is protocol number.
 711  * Fourth level is desired variable within that protocol.
 712  */
 713 #define IPV6PROTO_MAXID (IPPROTO_PIM + 1)       /* don't list to IPV6PROTO_MAX */
 714
 715 /*
 716  * Names for IP sysctl objects
 717  */
 718 #define IPV6CTL_FORWARDING      1       /* act as router */
 719 #define IPV6CTL_SENDREDIRECTS   2       /* may send redirects when forwarding*/
 720 #define IPV6CTL_DEFHLIM         3       /* default Hop-Limit */
 721 #ifdef notyet
 722 #define IPV6CTL_DEFMTU          4       /* default MTU */
 723 #endif
 724 #define IPV6CTL_FORWSRCRT       5       /* forward source-routed dgrams */
 725 #define IPV6CTL_STATS           6       /* stats */
 726 #define IPV6CTL_MRTSTATS        7       /* multicast forwarding stats */
 727 #define IPV6CTL_MRTPROTO        8       /* multicast routing protocol */
 728 #define IPV6CTL_MAXFRAGPACKETS  9       /* max packets reassembly queue */
 729 #define IPV6CTL_SOURCECHECK     10      /* verify source route and intf */
 730 #define IPV6CTL_SOURCECHECK_LOGINT 11   /* minimume logging interval */
 731 #define IPV6CTL_ACCEPT_RTADV    12
 732 #define IPV6CTL_KEEPFAITH       13      /* deprecated */
 733 #define IPV6CTL_LOG_INTERVAL    14
 734 #define IPV6CTL_HDRNESTLIMIT    15
 735 #define IPV6CTL_DAD_COUNT       16
 736 #define IPV6CTL_AUTO_FLOWLABEL  17
 737 #define IPV6CTL_DEFMCASTHLIM    18
 738 #define IPV6CTL_GIF_HLIM        19      /* default HLIM for gif encap packet */
 739 #define IPV6CTL_KAME_VERSION    20
 740 #define IPV6CTL_USE_DEPRECATED  21      /* use deprecated addr (RFC2462 5.5.4) */
 741 #define IPV6CTL_RR_PRUNE        22      /* walk timer for router renumbering */
 742 #if 0   /*obsolete*/
 743 #define IPV6CTL_MAPPED_ADDR     23
 744 #endif
 745 #define IPV6CTL_V6ONLY          24
 746 #define IPV6CTL_RTEXPIRE        25      /* cloned route expiration time */
 747 #define IPV6CTL_RTMINEXPIRE     26      /* min value for expiration time */
 748 #define IPV6CTL_RTMAXCACHE      27      /* trigger level for dynamic expire */
 749
 750 #define IPV6CTL_USETEMPADDR     32      /* use temporary addresses [RFC 4941] */
 751 #define IPV6CTL_TEMPPLTIME      33      /* preferred lifetime for tmpaddrs */
 752 #define IPV6CTL_TEMPVLTIME      34      /* valid lifetime for tmpaddrs */
 753 #define IPV6CTL_AUTO_LINKLOCAL  35      /* automatic link-local addr assign */
 754 #define IPV6CTL_RIP6STATS       36      /* raw_ip6 stats */
 755 #define IPV6CTL_PREFER_TEMPADDR 37      /* prefer temporary addr as src */
 756 #define IPV6CTL_ADDRCTLPOLICY   38      /* get/set address selection policy */
 757 #define IPV6CTL_USE_DEFAULTZONE 39      /* use default scope zone */
 758
 759 #define IPV6CTL_MAXFRAGS        41      /* max fragments */
 760 #define IPV6CTL_MCAST_PMTU      44      /* enable pMTU discovery for multicast? */
 761
 762 #define IPV6CTL_NEIGHBORGCTHRESH 46
 763 #define IPV6CTL_MAXIFPREFIXES   47
 764 #define IPV6CTL_MAXIFDEFROUTERS 48
 765 #define IPV6CTL_MAXDYNROUTES    49
 766 #define ICMPV6CTL_ND6_ONLINKNSRFC4861   50
 767
 768 /* New entries should be added here from current IPV6CTL_MAXID value. */
 769 /* to define items, should talk with KAME guys first, for *BSD compatibility */
 770 #define IPV6CTL_MAXID           51
 771
 772 #ifdef KERNEL_PRIVATE
 773 #define CTL_IPV6PROTO_NAMES { \
 774         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 775         { 0, 0 }, \
 776         { "tcp6", CTLTYPE_NODE }, \
 777         { 0, 0 }, \
 778         { 0, 0 }, \
 779         { 0, 0 }, \
 780         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 781         { 0, 0 }, \
 782         { 0, 0 }, \
 783         { "udp6", CTLTYPE_NODE }, \
 784         { 0, 0 }, \
 785         { 0, 0 }, \
 786         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 787         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 788         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 789         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 790         { 0, 0 }, \
 791         { "ip6", CTLTYPE_NODE }, \
 792         { 0, 0 }, \
 793         { 0, 0 }, \
 794         { 0, 0 }, \
 795         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 796         { 0, 0 }, \
 797         { "ipsec6", CTLTYPE_NODE }, \
 798         { 0, 0 }, \
 799         { 0, 0 }, \
 800         { 0, 0 }, \
 801         { 0, 0 }, \
 802         { 0, 0 }, \
 803         { 0, 0 }, \
 804         { "icmp6", CTLTYPE_NODE }, \
 805         { 0, 0 }, \
 806         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 807         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 808         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 809         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 810         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 811         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 812         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 813         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 814         { 0, 0 }, \
 815         { 0, 0 }, \
 816         { 0, 0 }, \
 817         { "pim6", CTLTYPE_NODE }, \
 818 }
 819 /*
 820  * Redefinition of mbuf flags
 821  */
 822 #define M_AUTHIPHDR     M_PROTO2
 823 #define M_DECRYPTED     M_PROTO3
 824 #define M_AUTHIPDGM     M_PROTO5
 825
 826 struct cmsghdr;
 827 struct mbuf;
 828 struct ifnet;
 829 struct in6_aliasreq;
 830
 831 #define in6_cksum(m, n, o, l)   inet6_cksum(m, n, o, l)
 832
 833 extern u_int16_t inet6_cksum(struct mbuf *m, unsigned int proto,
 834     unsigned int offset, unsigned int transport_len);
 835
 836 extern int in6_localaddr(struct in6_addr *);
 837 extern int in6_addrscope(struct in6_addr *);
 838 extern struct in6_ifaddr *in6_ifawithscope(struct ifnet *, struct in6_addr *);
 839 extern struct in6_ifaddr *in6_ifawithifp(struct ifnet *, struct in6_addr *);
 840 extern int in6_if_up(struct ifnet *, struct in6_aliasreq *);
 841 struct sockaddr;
 842
 843 extern void in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6);
 844 extern void in6_sin_2_v4mapsin6(struct sockaddr_in *sin,
 845     struct sockaddr_in6 *sin6);
 846 extern void in6_sin6_2_sin_in_sock(struct sockaddr *nam);
 847 extern int in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam);
 848 extern void in6_delayed_cksum(struct mbuf *, u_int16_t);
 849 extern int in6addr_local(struct in6_addr *);
 850
 851 #define DEBUG_HWCKSUM 1 /* IPv6 Hardware checksum on/off */
 852 /*
 853  * in6_cksum_phdr:
 854  *
 855  *      Compute significant parts of the IPv6 checksum pseudo-header
 856  *      for use in a delayed TCP/UDP checksum calculation.
 857  *
 858  *      Args:
 859  *
 860  *              src             Source IPv6 address
 861  *              dst             Destination IPv6 address
 862  *              len             htonl(proto-hdr-len)
 863  *              nxt             htonl(next-proto-number)
 864  *
 865  *      NOTE: We expect the src and dst addresses to be 16-bit
 866  *      aligned!
 867  */
 868 static __inline u_int16_t __unused
 869 in6_cksum_phdr(const struct in6_addr *src, const struct in6_addr *dst,
 870     u_int32_t len, u_int32_t nxt)
 871 {
 872         u_int32_t sum = 0;
 873         const u_int16_t *w;
 874
 875         /*LINTED*/
 876         w = (const u_int16_t *) src;
 877         sum += w[0];
 878         if (!IN6_IS_SCOPE_LINKLOCAL(src))
 879                 sum += w[1];
 880         sum += w[2]; sum += w[3]; sum += w[4]; sum += w[5];
 881         sum += w[6]; sum += w[7];
 882
 883         /*LINTED*/
 884         w = (const u_int16_t *) dst;
 885         sum += w[0];
 886         if (!IN6_IS_SCOPE_LINKLOCAL(dst))
 887                 sum += w[1];
 888         sum += w[2]; sum += w[3]; sum += w[4]; sum += w[5];
 889         sum += w[6]; sum += w[7];
 890
 891         sum += (u_int16_t)(len >> 16) + (u_int16_t)(len /*& 0xffff*/);
 892
 893         sum += (u_int16_t)(nxt >> 16) + (u_int16_t)(nxt /*& 0xffff*/);
 894
 895         sum = (u_int16_t)(sum >> 16) + (u_int16_t)(sum /*& 0xffff*/);
 896
 897         if (sum > 0xffff)
 898                 sum -= 0xffff;
 899
 900         return (sum);
 901 }
 902 #endif /* KERNEL_PRIVATE */
 903
 904 #ifndef KERNEL
 905 __BEGIN_DECLS
 906 struct cmsghdr;
 907
 908 extern int inet6_option_space(int);
 909 extern int inet6_option_init(void *, struct cmsghdr **, int);
 910 extern int inet6_option_append(struct cmsghdr *, const __uint8_t *,
 911         int, int);
 912 extern __uint8_t *inet6_option_alloc(struct cmsghdr *, int, int, int);
 913 extern int inet6_option_next(const struct cmsghdr *, __uint8_t **);
 914 extern int inet6_option_find(const struct cmsghdr *, __uint8_t **, int);
 915
 916 extern size_t inet6_rthdr_space(int, int);
 917 extern struct cmsghdr *inet6_rthdr_init(void *, int);
 918 extern int inet6_rthdr_add(struct cmsghdr *, const struct in6_addr *,
 919                 unsigned int);
 920 extern int inet6_rthdr_lasthop(struct cmsghdr *, unsigned int);
 921 #if 0 /* not implemented yet */
 922 extern int inet6_rthdr_reverse(const struct cmsghdr *, struct cmsghdr *);
 923 #endif
 924 extern int inet6_rthdr_segments(const struct cmsghdr *);
 925 extern struct in6_addr *inet6_rthdr_getaddr(struct cmsghdr *, int);
 926 extern int inet6_rthdr_getflags(const struct cmsghdr *, int);
 927
 928 extern int inet6_opt_init(void *, socklen_t);
 929 extern int inet6_opt_append(void *, socklen_t, int, __uint8_t,
 930                                  socklen_t, __uint8_t, void **);
 931 extern int inet6_opt_finish(void *, socklen_t, int);
 932 extern int inet6_opt_set_val(void *, int, void *, socklen_t);
 933
 934 extern int inet6_opt_next(void *, socklen_t, int, __uint8_t *,
 935                                socklen_t *, void **);
 936 extern int inet6_opt_find(void *, socklen_t, int, __uint8_t,
 937                           socklen_t *, void **);
 938 extern int inet6_opt_get_val(void *, int, void *, socklen_t);
 939 extern socklen_t inet6_rth_space(int, int);
 940 extern void *inet6_rth_init(void *, socklen_t, int, int);
 941 extern int inet6_rth_add(void *, const struct in6_addr *);
 942 extern int inet6_rth_reverse(const void *, void *);
 943 extern int inet6_rth_segments(const void *);
 944 extern struct in6_addr *inet6_rth_getaddr(const void *, int);
 945 extern void addrsel_policy_init(void);
 946 __END_DECLS
 947 #endif /* !KERNEL */
 948 #endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
 949 #endif /* !_NETINET6_IN6_H_ */