bsd/netinet6/in6.h

   1 /*
   2  * Copyright (c) 2008-2011 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 #endif /* KERNEL_PRIVATE */
 220
 221 #ifdef KERNEL   /*XXX nonstandard*/
 222 /*
 223  * Macros started with IPV6_ADDR is KAME local
 224  */
 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_ULL     0xfe80
 232 #define IPV6_ADDR_INT16_USL     0xfec0
 233 #define IPV6_ADDR_INT16_MLL     0xff02
 234 #elif BYTE_ORDER == LITTLE_ENDIAN
 235 #define IPV6_ADDR_INT32_ONE     0x01000000
 236 #define IPV6_ADDR_INT32_TWO     0x02000000
 237 #define IPV6_ADDR_INT32_MNL     0x000001ff
 238 #define IPV6_ADDR_INT32_MLL     0x000002ff
 239 #define IPV6_ADDR_INT32_SMP     0xffff0000
 240 #define IPV6_ADDR_INT16_ULL     0x80fe
 241 #define IPV6_ADDR_INT16_USL     0xc0fe
 242 #define IPV6_ADDR_INT16_MLL     0x02ff
 243 #endif
 244 #endif
 245
 246 /*
 247  * Definition of some useful macros to handle IP6 addresses
 248  */
 249 #define IN6ADDR_ANY_INIT \
 250         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 251             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
 252 #define IN6ADDR_LOOPBACK_INIT \
 253         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 254             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 255 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 256 #define IN6ADDR_NODELOCAL_ALLNODES_INIT \
 257         {{{ 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 258             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 259 #define IN6ADDR_INTFACELOCAL_ALLNODES_INIT \
 260         {{{ 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 261             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 262 #define IN6ADDR_LINKLOCAL_ALLNODES_INIT \
 263         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 264             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 265 #define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \
 266         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 267             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}}
 268 #define IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT \
 269         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 270             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x16 }}}
 271 #define IN6ADDR_V4MAPPED_INIT \
 272         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 273             0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00 }}}
 274 #endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
 275
 276 extern const struct in6_addr in6addr_any;
 277 extern const struct in6_addr in6addr_loopback;
 278 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 279 extern const struct in6_addr in6addr_nodelocal_allnodes;
 280 extern const struct in6_addr in6addr_linklocal_allnodes;
 281 extern const struct in6_addr in6addr_linklocal_allrouters;
 282 extern const struct in6_addr in6addr_linklocal_allv2routers;
 283 #endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
 284
 285 /*
 286  * Equality
 287  * NOTE: Some of kernel programming environment (for example, openbsd/sparc)
 288  * does not supply memcmp().  For userland memcmp() is preferred as it is
 289  * in ANSI standard.
 290  */
 291 #ifdef KERNEL
 292 #define IN6_ARE_ADDR_EQUAL(a, b)                        \
 293     (bcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
 294 #else
 295 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 296 #define IN6_ARE_ADDR_EQUAL(a, b)                        \
 297     (memcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
 298 #endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
 299 #endif
 300
 301 #ifdef KERNEL                   /* non standard */
 302 /* see if two addresses are equal in a scope-conscious manner. */
 303 #define SA6_ARE_ADDR_EQUAL(a, b) \
 304         (((a)->sin6_scope_id == 0 || (b)->sin6_scope_id == 0 || \
 305           ((a)->sin6_scope_id == (b)->sin6_scope_id)) && \
 306          (bcmp(&(a)->sin6_addr, &(b)->sin6_addr, sizeof(struct in6_addr)) == 0))
 307 #endif
 308
 309 /*
 310  * Unspecified
 311  */
 312 #define IN6_IS_ADDR_UNSPECIFIED(a)      \
 313         ((*(const __uint32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
 314          (*(const __uint32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
 315          (*(const __uint32_t *)(const void *)(&(a)->s6_addr[8]) == 0) && \
 316          (*(const __uint32_t *)(const void *)(&(a)->s6_addr[12]) == 0))
 317
 318 /*
 319  * Loopback
 320  */
 321 #define IN6_IS_ADDR_LOOPBACK(a)         \
 322         ((*(const __uint32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
 323          (*(const __uint32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
 324          (*(const __uint32_t *)(const void *)(&(a)->s6_addr[8]) == 0) && \
 325          (*(const __uint32_t *)(const void *)(&(a)->s6_addr[12]) == ntohl(1)))
 326
 327 /*
 328  * IPv4 compatible
 329  */
 330 #define IN6_IS_ADDR_V4COMPAT(a)         \
 331         ((*(const __uint32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
 332          (*(const __uint32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
 333          (*(const __uint32_t *)(const void *)(&(a)->s6_addr[8]) == 0) && \
 334          (*(const __uint32_t *)(const void *)(&(a)->s6_addr[12]) != 0) && \
 335          (*(const __uint32_t *)(const void *)(&(a)->s6_addr[12]) != ntohl(1)))
 336
 337 /*
 338  * Mapped
 339  */
 340 #define IN6_IS_ADDR_V4MAPPED(a)               \
 341         ((*(const __uint32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
 342          (*(const __uint32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
 343          (*(const __uint32_t *)(const void *)(&(a)->s6_addr[8]) == ntohl(0x0000ffff)))
 344
 345 /*
 346  * 6to4
 347  */
 348 #define IN6_IS_ADDR_6TO4(x)     (ntohs((x)->s6_addr16[0]) == 0x2002)
 349
 350 /*
 351  * KAME Scope Values
 352  */
 353
 354 #ifdef KERNEL   /*XXX nonstandard*/
 355 #define IPV6_ADDR_SCOPE_NODELOCAL       0x01
 356 #define IPV6_ADDR_SCOPE_INTFACELOCAL    0x01
 357 #define IPV6_ADDR_SCOPE_LINKLOCAL       0x02
 358 #define IPV6_ADDR_SCOPE_SITELOCAL       0x05
 359 #define IPV6_ADDR_SCOPE_ORGLOCAL        0x08    /* just used in this file */
 360 #define IPV6_ADDR_SCOPE_GLOBAL          0x0e
 361 #else
 362 #define __IPV6_ADDR_SCOPE_NODELOCAL     0x01
 363 #define __IPV6_ADDR_SCOPE_INTFACELOCAL  0x01
 364 #define __IPV6_ADDR_SCOPE_LINKLOCAL     0x02
 365 #define __IPV6_ADDR_SCOPE_SITELOCAL     0x05
 366 #define __IPV6_ADDR_SCOPE_ORGLOCAL      0x08    /* just used in this file */
 367 #define __IPV6_ADDR_SCOPE_GLOBAL        0x0e
 368 #endif
 369
 370 /*
 371  * Unicast Scope
 372  * Note that we must check topmost 10 bits only, not 16 bits (see RFC2373).
 373  */
 374 #define IN6_IS_ADDR_LINKLOCAL(a)        \
 375         (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0x80))
 376 #define IN6_IS_ADDR_SITELOCAL(a)        \
 377         (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0xc0))
 378
 379 /*
 380  * Multicast
 381  */
 382 #define IN6_IS_ADDR_MULTICAST(a)        ((a)->s6_addr[0] == 0xff)
 383
 384 /*
 385  * Unique Local IPv6 Unicast Addresses (per RFC 4193)
 386  */
 387 #define IN6_IS_ADDR_UNIQUE_LOCAL(a)     (((a)->s6_addr[0] == 0xfc) || ((a)->s6_addr[0] == 0xfd))
 388
 389 #ifdef KERNEL   /*XXX nonstandard*/
 390 #define IPV6_ADDR_MC_SCOPE(a)           ((a)->s6_addr[1] & 0x0f)
 391 #else
 392 #define __IPV6_ADDR_MC_SCOPE(a)         ((a)->s6_addr[1] & 0x0f)
 393 #endif
 394
 395 /*
 396  * Multicast Scope
 397  */
 398 #ifdef KERNEL   /*refers nonstandard items */
 399 #define IN6_IS_ADDR_MC_NODELOCAL(a)     \
 400         (IN6_IS_ADDR_MULTICAST(a) &&    \
 401          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_NODELOCAL))
 402 #define IN6_IS_ADDR_MC_INTFACELOCAL(a)  \
 403         (IN6_IS_ADDR_MULTICAST(a) &&    \
 404         (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_INTFACELOCAL))
 405 #define IN6_IS_ADDR_MC_LINKLOCAL(a)     \
 406         (IN6_IS_ADDR_MULTICAST(a) &&    \
 407          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_LINKLOCAL))
 408 #define IN6_IS_ADDR_MC_SITELOCAL(a)     \
 409         (IN6_IS_ADDR_MULTICAST(a) &&    \
 410          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_SITELOCAL))
 411 #define IN6_IS_ADDR_MC_ORGLOCAL(a)      \
 412         (IN6_IS_ADDR_MULTICAST(a) &&    \
 413          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_ORGLOCAL))
 414 #define IN6_IS_ADDR_MC_GLOBAL(a)        \
 415         (IN6_IS_ADDR_MULTICAST(a) &&    \
 416          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_GLOBAL))
 417 #else
 418 #define IN6_IS_ADDR_MC_NODELOCAL(a)     \
 419         (IN6_IS_ADDR_MULTICAST(a) &&    \
 420          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_NODELOCAL))
 421 #define IN6_IS_ADDR_MC_LINKLOCAL(a)     \
 422         (IN6_IS_ADDR_MULTICAST(a) &&    \
 423          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_LINKLOCAL))
 424 #define IN6_IS_ADDR_MC_SITELOCAL(a)     \
 425         (IN6_IS_ADDR_MULTICAST(a) &&    \
 426          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_SITELOCAL))
 427 #define IN6_IS_ADDR_MC_ORGLOCAL(a)      \
 428         (IN6_IS_ADDR_MULTICAST(a) &&    \
 429          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_ORGLOCAL))
 430 #define IN6_IS_ADDR_MC_GLOBAL(a)        \
 431         (IN6_IS_ADDR_MULTICAST(a) &&    \
 432          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_GLOBAL))
 433 #endif
 434
 435 #ifdef KERNEL   /*nonstandard*/
 436 /*
 437  * KAME Scope
 438  */
 439 #define IN6_IS_SCOPE_LINKLOCAL(a)       \
 440         ((IN6_IS_ADDR_LINKLOCAL(a)) ||  \
 441          (IN6_IS_ADDR_MC_LINKLOCAL(a)))
 442
 443 #define IN6_IS_SCOPE_EMBED(a)                   \
 444         ((IN6_IS_ADDR_LINKLOCAL(a)) ||          \
 445         (IN6_IS_ADDR_MC_LINKLOCAL(a)) ||        \
 446         (IN6_IS_ADDR_MC_INTFACELOCAL(a)))
 447
 448 #define IFA6_IS_DEPRECATED(a) \
 449         ((a)->ia6_lifetime.ia6t_preferred != 0 && \
 450          (a)->ia6_lifetime.ia6t_preferred < timenow.tv_sec)
 451 #define IFA6_IS_INVALID(a) \
 452         ((a)->ia6_lifetime.ia6t_expire != 0 && \
 453          (a)->ia6_lifetime.ia6t_expire < timenow.tv_sec)
 454 #endif /* KERNEL */
 455
 456 /*
 457  * IP6 route structure
 458  */
 459 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 460 #ifdef PRIVATE
 461 struct route_in6 {
 462         /*
 463          * N.B: struct route_in6 must begin with ro_rt and ro_flags
 464          * because the code does some casts of a 'struct route_in6 *'
 465          * to a 'struct route *'.
 466          */
 467         struct rtentry  *ro_rt;
 468         __uint32_t      ro_flags;       /* route flags */
 469         struct sockaddr_in6 ro_dst;
 470 };
 471 #endif /* PRIVATE */
 472 #endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
 473
 474 /*
 475  * Options for use with [gs]etsockopt at the IPV6 level.
 476  * First word of comment is data type; bool is stored in int.
 477  */
 478 /* no hdrincl */
 479 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 480 /*
 481  * RFC 3542 define the following socket options in a manner incompatible
 482  * with RFC 2292:
 483  *   IPV6_PKTINFO
 484  *   IPV6_HOPLIMIT
 485  *   IPV6_NEXTHOP
 486  *   IPV6_HOPOPTS
 487  *   IPV6_DSTOPTS
 488  *   IPV6_RTHDR
 489  *
 490  * To use the new IPv6 Sockets options introduced by RFC 3542
 491  * the constant __APPLE_USE_RFC_3542 must be defined before
 492  * including <netinet/in.h>
 493  *
 494  * To use the old IPv6 Sockets options from RFC 2292
 495  * the constant __APPLE_USE_RFC_2292 must be defined before
 496  * including <netinet/in.h>
 497  *
 498  * Note that eventually RFC 3542 is going to be the
 499  * default and RFC 2292 will be obsolete.
 500  */
 501 #ifdef XNU_KERNEL_PRIVATE
 502 #define __APPLE_USE_RFC_3542 1
 503 #endif /* XNU_KERNEL_PRIVATE */
 504
 505 #if defined(__APPLE_USE_RFC_3542) && defined(__APPLE_USE_RFC_2292)
 506 #error "__APPLE_USE_RFC_3542 and __APPLE_USE_RFC_2292 cannot be both defined"
 507 #endif
 508
 509 #if 0 /* the followings are relic in IPv4 and hence are disabled */
 510 #define IPV6_OPTIONS            1  /* buf/ip6_opts; set/get IP6 options */
 511 #define IPV6_RECVOPTS           5  /* bool; receive all IP6 opts w/dgram */
 512 #define IPV6_RECVRETOPTS        6  /* bool; receive IP6 opts for response */
 513 #define IPV6_RECVDSTADDR        7  /* bool; receive IP6 dst addr w/dgram */
 514 #define IPV6_RETOPTS            8  /* ip6_opts; set/get IP6 options */
 515 #endif /* 0 */
 516 #define IPV6_SOCKOPT_RESERVED1  3  /* reserved for future use */
 517 #endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
 518 #define IPV6_UNICAST_HOPS       4  /* int; IP6 hops */
 519 #define IPV6_MULTICAST_IF       9  /* __uint8_t; set/get IP6 multicast i/f  */
 520 #define IPV6_MULTICAST_HOPS     10 /* __uint8_t; set/get IP6 multicast hops */
 521 #define IPV6_MULTICAST_LOOP     11 /* __uint8_t; set/get IP6 mcast loopback */
 522 #define IPV6_JOIN_GROUP         12 /* ip6_mreq; join a group membership */
 523 #define IPV6_LEAVE_GROUP        13 /* ip6_mreq; leave a group membership */
 524
 525 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 526 #define IPV6_PORTRANGE          14 /* int; range to choose for unspec port */
 527 #define ICMP6_FILTER            18 /* icmp6_filter; icmp6 filter */
 528 #define IPV6_2292PKTINFO        19 /* bool; send/recv if, src/dst addr */
 529 #define IPV6_2292HOPLIMIT       20 /* bool; hop limit */
 530 #define IPV6_2292NEXTHOP        21 /* bool; next hop addr */
 531 #define IPV6_2292HOPOPTS        22 /* bool; hop-by-hop option */
 532 #define IPV6_2292DSTOPTS        23 /* bool; destinaion option */
 533 #define IPV6_2292RTHDR          24 /* ip6_rthdr: routing header */
 534 #define IPV6_2292PKTOPTIONS     25 /* buf/cmsghdr; set/get IPv6 options */
 535                                    /* obsoleted by RFC3542 */
 536
 537 #ifdef __APPLE_USE_RFC_2292
 538 #define IPV6_PKTINFO        IPV6_2292PKTINFO
 539 #define IPV6_HOPLIMIT       IPV6_2292HOPLIMIT
 540 #define IPV6_NEXTHOP        IPV6_2292NEXTHOP
 541 #define IPV6_HOPOPTS        IPV6_2292HOPOPTS
 542 #define IPV6_DSTOPTS        IPV6_2292DSTOPTS
 543 #define IPV6_RTHDR          IPV6_2292RTHDR
 544 #define IPV6_PKTOPTIONS     IPV6_2292PKTOPTIONS
 545 #endif /* __APPLE_USE_RFC_2292 */
 546
 547 #define IPV6_CHECKSUM           26 /* int; checksum offset for raw socket */
 548 #endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
 549 #define IPV6_V6ONLY             27 /* bool; only bind INET6 at wildcard bind */
 550 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 551 #ifndef KERNEL
 552 #define IPV6_BINDV6ONLY         IPV6_V6ONLY
 553 #endif /* KERNEL */
 554
 555
 556 #if 1 /*IPSEC*/
 557 #define IPV6_IPSEC_POLICY       28 /* struct; get/set security policy */
 558 #endif /* 1 */
 559 #define IPV6_FAITH              29 /* bool; accept FAITH'ed connections */
 560
 561 #if 1 /*IPV6FIREWALL*/
 562 #define IPV6_FW_ADD             30 /* add a firewall rule to chain */
 563 #define IPV6_FW_DEL             31 /* delete a firewall rule from chain */
 564 #define IPV6_FW_FLUSH           32 /* flush firewall rule chain */
 565 #define IPV6_FW_ZERO            33 /* clear single/all firewall counter(s) */
 566 #define IPV6_FW_GET             34 /* get entire firewall rule chain */
 567 #endif /* 1 */
 568
 569 /* APPLE: NOTE the value of those 2 options is kept unchanged from
 570  *        previous version of darwin/OS X for binary compatibility reasons
 571  *        and differ from FreeBSD (values 57 and 61). See below.
 572  */
 573 #define IPV6_RECVTCLASS         35 /* bool; recv traffic class values */
 574 #define IPV6_TCLASS             36 /* int; send traffic class value */
 575
 576 #ifdef __APPLE_USE_RFC_3542
 577 /* new socket options introduced in RFC3542 */
 578 #define IPV6_RTHDRDSTOPTS       57 /* ip6_dest; send dst option before rthdr
 579                                     * APPLE: Value purposely different than FreeBSD (35) to avoid
 580                                     * collision with definition of IPV6_RECVTCLASS in previous
 581                                     * darwin implementations */
 582
 583 #define IPV6_RECVPKTINFO        61 /* bool; recv if, dst addr
 584                                     * APPLE: Value purposely different than FreeBSD (36) to avoid
 585                                     * collision with definition of IPV6_TCLASS in previous
 586                                     * darwin implementations */
 587
 588 #define IPV6_RECVHOPLIMIT       37 /* bool; recv hop limit */
 589 #define IPV6_RECVRTHDR          38 /* bool; recv routing header */
 590 #define IPV6_RECVHOPOPTS        39 /* bool; recv hop-by-hop option */
 591 #define IPV6_RECVDSTOPTS        40 /* bool; recv dst option after rthdr */
 592 #ifdef KERNEL
 593 #define IPV6_RECVRTHDRDSTOPTS   41 /* bool; recv dst option before rthdr */
 594 #endif
 595
 596 #define IPV6_USE_MIN_MTU        42 /* bool; send packets at the minimum MTU */
 597 #define IPV6_RECVPATHMTU        43 /* bool; notify an according MTU */
 598
 599 #define IPV6_PATHMTU            44 /* mtuinfo; get the current path MTU (sopt),
 600                                       4 bytes int; MTU notification (cmsg) */
 601 #if 0 /*obsoleted during 2292bis -> 3542*/
 602 #define IPV6_REACHCONF          45 /* no data; ND reachability confirm
 603                                       (cmsg only/not in of RFC3542) */
 604 #endif
 605 /* more new socket options introduced in RFC3542 */
 606 #define IPV6_3542PKTINFO        46 /* in6_pktinfo; send if, src addr */
 607 #define IPV6_3542HOPLIMIT       47 /* int; send hop limit */
 608 #define IPV6_3542NEXTHOP        48 /* sockaddr; next hop addr */
 609 #define IPV6_3542HOPOPTS        49 /* ip6_hbh; send hop-by-hop option */
 610 #define IPV6_3542DSTOPTS        50 /* ip6_dest; send dst option befor rthdr */
 611 #define IPV6_3542RTHDR          51 /* ip6_rthdr; send routing header */
 612
 613 #define IPV6_PKTINFO        IPV6_3542PKTINFO
 614 #define IPV6_HOPLIMIT       IPV6_3542HOPLIMIT
 615 #define IPV6_NEXTHOP        IPV6_3542NEXTHOP
 616 #define IPV6_HOPOPTS        IPV6_3542HOPOPTS
 617 #define IPV6_DSTOPTS        IPV6_3542DSTOPTS
 618 #define IPV6_RTHDR          IPV6_3542RTHDR
 619
 620 #define IPV6_AUTOFLOWLABEL      59 /* bool; attach flowlabel automagically */
 621
 622 #define IPV6_DONTFRAG           62 /* bool; disable IPv6 fragmentation */
 623
 624 #define IPV6_PREFER_TEMPADDR    63 /* int; prefer temporary addresses as
 625                                     * the source address.
 626                                     */
 627
 628 /*
 629  * The following option is private; do not use it from user applications.
 630  * It is deliberately defined to the same value as IP_MSFILTER.
 631  */
 632 #define IPV6_MSFILTER           74 /* struct __msfilterreq;
 633                                     * set/get multicast source filter list.
 634                                     */
 635 #endif /* __APPLE_USE_RFC_3542 */
 636
 637 #define IPV6_BOUND_IF           125 /* int; set/get bound interface */
 638
 639 #ifdef PRIVATE
 640 #define IPV6_NO_IFT_CELLULAR    6969 /* for internal use only */
 641 #define IPV6_OUT_IF             9696 /* for internal use only */
 642 #endif /* PRIVATE */
 643
 644 /* to define items, should talk with KAME guys first, for *BSD compatibility */
 645
 646 #define IPV6_RTHDR_LOOSE     0 /* this hop need not be a neighbor. XXX old spec */
 647 #define IPV6_RTHDR_STRICT    1 /* this hop must be a neighbor. XXX old spec */
 648 #define IPV6_RTHDR_TYPE_0    0 /* IPv6 routing header type 0 */
 649
 650 /*
 651  * Defaults and limits for options
 652  */
 653 #define IPV6_DEFAULT_MULTICAST_HOPS 1   /* normally limit m'casts to 1 hop  */
 654 #define IPV6_DEFAULT_MULTICAST_LOOP 1   /* normally hear sends if a member  */
 655
 656 /*
 657  * The im6o_membership vector for each socket is now dynamically allocated at
 658  * run-time, bounded by USHRT_MAX, and is reallocated when needed, sized
 659  * according to a power-of-two increment.
 660  */
 661 #define IPV6_MIN_MEMBERSHIPS    31
 662 #define IPV6_MAX_MEMBERSHIPS    4095
 663
 664 /*
 665  * Default resource limits for IPv6 multicast source filtering.
 666  * These may be modified by sysctl.
 667  */
 668 #define IPV6_MAX_GROUP_SRC_FILTER       512     /* sources per group */
 669 #define IPV6_MAX_SOCK_SRC_FILTER        128     /* sources per socket/group */
 670
 671 /*
 672  * Argument structure for IPV6_JOIN_GROUP and IPV6_LEAVE_GROUP.
 673  */
 674 struct ipv6_mreq {
 675         struct in6_addr ipv6mr_multiaddr;
 676         unsigned int    ipv6mr_interface;
 677 };
 678
 679 /*
 680  * IPV6_2292PKTINFO: Packet information(RFC2292 sec 5)
 681  */
 682 struct in6_pktinfo {
 683         struct in6_addr ipi6_addr;      /* src/dst IPv6 address */
 684         unsigned int    ipi6_ifindex;   /* send/recv interface index */
 685 };
 686
 687 /*
 688  * Control structure for IPV6_RECVPATHMTU socket option.
 689  */
 690 struct ip6_mtuinfo {
 691         struct sockaddr_in6 ip6m_addr;  /* or sockaddr_storage? */
 692         uint32_t ip6m_mtu;
 693 };
 694
 695 /*
 696  * Argument for IPV6_PORTRANGE:
 697  * - which range to search when port is unspecified at bind() or connect()
 698  */
 699 #define IPV6_PORTRANGE_DEFAULT  0       /* default range */
 700 #define IPV6_PORTRANGE_HIGH     1       /* "high" - request firewall bypass */
 701 #define IPV6_PORTRANGE_LOW      2       /* "low" - vouchsafe security */
 702
 703 /*
 704  * Definitions for inet6 sysctl operations.
 705  *
 706  * Third level is protocol number.
 707  * Fourth level is desired variable within that protocol.
 708  */
 709 #define IPV6PROTO_MAXID (IPPROTO_PIM + 1)       /* don't list to IPV6PROTO_MAX */
 710
 711 /*
 712  * Names for IP sysctl objects
 713  */
 714 #define IPV6CTL_FORWARDING      1       /* act as router */
 715 #define IPV6CTL_SENDREDIRECTS   2       /* may send redirects when forwarding*/
 716 #define IPV6CTL_DEFHLIM         3       /* default Hop-Limit */
 717 #ifdef notyet
 718 #define IPV6CTL_DEFMTU          4       /* default MTU */
 719 #endif
 720 #define IPV6CTL_FORWSRCRT       5       /* forward source-routed dgrams */
 721 #define IPV6CTL_STATS           6       /* stats */
 722 #define IPV6CTL_MRTSTATS        7       /* multicast forwarding stats */
 723 #define IPV6CTL_MRTPROTO        8       /* multicast routing protocol */
 724 #define IPV6CTL_MAXFRAGPACKETS  9       /* max packets reassembly queue */
 725 #define IPV6CTL_SOURCECHECK     10      /* verify source route and intf */
 726 #define IPV6CTL_SOURCECHECK_LOGINT 11   /* minimume logging interval */
 727 #define IPV6CTL_ACCEPT_RTADV    12
 728 #define IPV6CTL_KEEPFAITH       13
 729 #define IPV6CTL_LOG_INTERVAL    14
 730 #define IPV6CTL_HDRNESTLIMIT    15
 731 #define IPV6CTL_DAD_COUNT       16
 732 #define IPV6CTL_AUTO_FLOWLABEL  17
 733 #define IPV6CTL_DEFMCASTHLIM    18
 734 #define IPV6CTL_GIF_HLIM        19      /* default HLIM for gif encap packet */
 735 #define IPV6CTL_KAME_VERSION    20
 736 #define IPV6CTL_USE_DEPRECATED  21      /* use deprecated addr (RFC2462 5.5.4) */
 737 #define IPV6CTL_RR_PRUNE        22      /* walk timer for router renumbering */
 738 #if 0   /*obsolete*/
 739 #define IPV6CTL_MAPPED_ADDR     23
 740 #endif
 741 #define IPV6CTL_V6ONLY          24
 742 #define IPV6CTL_RTEXPIRE        25      /* cloned route expiration time */
 743 #define IPV6CTL_RTMINEXPIRE     26      /* min value for expiration time */
 744 #define IPV6CTL_RTMAXCACHE      27      /* trigger level for dynamic expire */
 745
 746 #define IPV6CTL_USETEMPADDR     32      /* use temporary addresses [RFC 4941] */
 747 #define IPV6CTL_TEMPPLTIME      33      /* preferred lifetime for tmpaddrs */
 748 #define IPV6CTL_TEMPVLTIME      34      /* valid lifetime for tmpaddrs */
 749 #define IPV6CTL_AUTO_LINKLOCAL  35      /* automatic link-local addr assign */
 750 #define IPV6CTL_RIP6STATS       36      /* raw_ip6 stats */
 751 #define IPV6CTL_PREFER_TEMPADDR 37      /* prefer temporary addr as src */
 752 #define IPV6CTL_ADDRCTLPOLICY   38      /* get/set address selection policy */
 753 #define IPV6CTL_USE_DEFAULTZONE 39      /* use default scope zone */
 754
 755 #define IPV6CTL_MAXFRAGS        41      /* max fragments */
 756 #define IPV6CTL_MCAST_PMTU      44      /* enable pMTU discovery for multicast? */
 757
 758 #define IPV6CTL_NEIGHBORGCTHRESH 46
 759 #define IPV6CTL_MAXIFPREFIXES   47
 760 #define IPV6CTL_MAXIFDEFROUTERS 48
 761 #define IPV6CTL_MAXDYNROUTES    49
 762 #define ICMPV6CTL_ND6_ONLINKNSRFC4861   50
 763
 764 /* New entries should be added here from current IPV6CTL_MAXID value. */
 765 /* to define items, should talk with KAME guys first, for *BSD compatibility */
 766 #define IPV6CTL_MAXID           51
 767
 768 #ifdef KERNEL_PRIVATE
 769 #define CTL_IPV6PROTO_NAMES { \
 770         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 771         { 0, 0 }, \
 772         { "tcp6", CTLTYPE_NODE }, \
 773         { 0, 0 }, \
 774         { 0, 0 }, \
 775         { 0, 0 }, \
 776         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 777         { 0, 0 }, \
 778         { 0, 0 }, \
 779         { "udp6", CTLTYPE_NODE }, \
 780         { 0, 0 }, \
 781         { 0, 0 }, \
 782         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 783         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 784         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 785         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 786         { 0, 0 }, \
 787         { "ip6", CTLTYPE_NODE }, \
 788         { 0, 0 }, \
 789         { 0, 0 }, \
 790         { 0, 0 }, \
 791         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 792         { 0, 0 }, \
 793         { "ipsec6", CTLTYPE_NODE }, \
 794         { 0, 0 }, \
 795         { 0, 0 }, \
 796         { 0, 0 }, \
 797         { 0, 0 }, \
 798         { 0, 0 }, \
 799         { 0, 0 }, \
 800         { "icmp6", CTLTYPE_NODE }, \
 801         { 0, 0 }, \
 802         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 803         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 804         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 805         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 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 }, \
 811         { 0, 0 }, \
 812         { 0, 0 }, \
 813         { "pim6", CTLTYPE_NODE }, \
 814 }
 815 /*
 816  * Redefinition of mbuf flags
 817  */
 818 #define M_AUTHIPHDR     M_PROTO2
 819 #define M_DECRYPTED     M_PROTO3
 820 #define M_AUTHIPDGM     M_PROTO5
 821
 822 struct cmsghdr;
 823 struct mbuf;
 824 struct ifnet;
 825 struct in6_aliasreq;
 826
 827 #define in6_cksum(m, n, o, l)   inet6_cksum(m, n, o, l)
 828
 829 extern u_int16_t inet6_cksum(struct mbuf *m, unsigned int proto,
 830     unsigned int offset, unsigned int transport_len);
 831
 832 extern int in6_localaddr(struct in6_addr *);
 833 extern int in6_addrscope(struct in6_addr *);
 834 extern struct in6_ifaddr *in6_ifawithscope(struct ifnet *, struct in6_addr *);
 835 extern struct in6_ifaddr *in6_ifawithifp(struct ifnet *, struct in6_addr *);
 836 extern int in6_if_up(struct ifnet *, struct in6_aliasreq *);
 837 struct sockaddr;
 838
 839 extern void in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6);
 840 extern void in6_sin_2_v4mapsin6(struct sockaddr_in *sin,
 841     struct sockaddr_in6 *sin6);
 842 extern void in6_sin6_2_sin_in_sock(struct sockaddr *nam);
 843 extern int in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam);
 844 extern void in6_delayed_cksum(struct mbuf *, u_int16_t);
 845
 846 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
 847 #define sin6tosa(sin6)  ((struct sockaddr *)(sin6))
 848 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
 849
 850 extern int in6addr_local(struct in6_addr *);
 851
 852 #define DEBUG_HWCKSUM 1 /* IPv6 Hardware checksum on/off */
 853 /*
 854  * in6_cksum_phdr:
 855  *
 856  *      Compute significant parts of the IPv6 checksum pseudo-header
 857  *      for use in a delayed TCP/UDP checksum calculation.
 858  *
 859  *      Args:
 860  *
 861  *              src             Source IPv6 address
 862  *              dst             Destination IPv6 address
 863  *              len             htonl(proto-hdr-len)
 864  *              nxt             htonl(next-proto-number)
 865  *
 866  *      NOTE: We expect the src and dst addresses to be 16-bit
 867  *      aligned!
 868  */
 869 static __inline u_int16_t __unused
 870 in6_cksum_phdr(const struct in6_addr *src, const struct in6_addr *dst,
 871     u_int32_t len, u_int32_t nxt)
 872 {
 873         u_int32_t sum = 0;
 874         const u_int16_t *w;
 875
 876         /*LINTED*/
 877         w = (const u_int16_t *) src;
 878         sum += w[0];
 879         if (!IN6_IS_SCOPE_LINKLOCAL(src))
 880                 sum += w[1];
 881         sum += w[2]; sum += w[3]; sum += w[4]; sum += w[5];
 882         sum += w[6]; sum += w[7];
 883
 884         /*LINTED*/
 885         w = (const u_int16_t *) dst;
 886         sum += w[0];
 887         if (!IN6_IS_SCOPE_LINKLOCAL(dst))
 888                 sum += w[1];
 889         sum += w[2]; sum += w[3]; sum += w[4]; sum += w[5];
 890         sum += w[6]; sum += w[7];
 891
 892         sum += (u_int16_t)(len >> 16) + (u_int16_t)(len /*& 0xffff*/);
 893
 894         sum += (u_int16_t)(nxt >> 16) + (u_int16_t)(nxt /*& 0xffff*/);
 895
 896         sum = (u_int16_t)(sum >> 16) + (u_int16_t)(sum /*& 0xffff*/);
 897
 898         if (sum > 0xffff)
 899                 sum -= 0xffff;
 900
 901         return (sum);
 902 }
 903 #endif /* KERNEL_PRIVATE */
 904
 905 #ifndef KERNEL
 906 __BEGIN_DECLS
 907 struct cmsghdr;
 908
 909 extern int inet6_option_space(int);
 910 extern int inet6_option_init(void *, struct cmsghdr **, int);
 911 extern int inet6_option_append(struct cmsghdr *, const __uint8_t *,
 912         int, int);
 913 extern __uint8_t *inet6_option_alloc(struct cmsghdr *, int, int, int);
 914 extern int inet6_option_next(const struct cmsghdr *, __uint8_t **);
 915 extern int inet6_option_find(const struct cmsghdr *, __uint8_t **, int);
 916
 917 extern size_t inet6_rthdr_space(int, int);
 918 extern struct cmsghdr *inet6_rthdr_init(void *, int);
 919 extern int inet6_rthdr_add(struct cmsghdr *, const struct in6_addr *,
 920                 unsigned int);
 921 extern int inet6_rthdr_lasthop(struct cmsghdr *, unsigned int);
 922 #if 0 /* not implemented yet */
 923 extern int inet6_rthdr_reverse(const struct cmsghdr *, struct cmsghdr *);
 924 #endif
 925 extern int inet6_rthdr_segments(const struct cmsghdr *);
 926 extern struct in6_addr *inet6_rthdr_getaddr(struct cmsghdr *, int);
 927 extern int inet6_rthdr_getflags(const struct cmsghdr *, int);
 928
 929 extern int inet6_opt_init(void *, socklen_t);
 930 extern int inet6_opt_append(void *, socklen_t, int, __uint8_t,
 931                                  socklen_t, __uint8_t, void **);
 932 extern int inet6_opt_finish(void *, socklen_t, int);
 933 extern int inet6_opt_set_val(void *, int, void *, socklen_t);
 934
 935 extern int inet6_opt_next(void *, socklen_t, int, __uint8_t *,
 936                                socklen_t *, void **);
 937 extern int inet6_opt_find(void *, socklen_t, int, __uint8_t,
 938                           socklen_t *, void **);
 939 extern int inet6_opt_get_val(void *, int, void *, socklen_t);
 940 extern socklen_t inet6_rth_space(int, int);
 941 extern void *inet6_rth_init(void *, socklen_t, int, int);
 942 extern int inet6_rth_add(void *, const struct in6_addr *);
 943 extern int inet6_rth_reverse(const void *, void *);
 944 extern int inet6_rth_segments(const void *);
 945 extern struct in6_addr *inet6_rth_getaddr(const void *, int);
 946 extern void addrsel_policy_init(void);
 947 __END_DECLS
 948 #endif /* !KERNEL */
 949 #endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
 950 #endif /* !_NETINET6_IN6_H_ */