sys/netinet6/in6.h

   1 /*      $FreeBSD: src/sys/netinet6/in6.h,v 1.7.2.7 2002/08/01 19:38:50 ume Exp $        */
   2 /*      $DragonFly: src/sys/netinet6/in6.h,v 1.12 2008/09/14 08:58:33 hasso Exp $       */
   3 /*      $KAME: in6.h,v 1.89 2001/05/27 13:28:35 itojun Exp $    */
   4
   5 /*
   6  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the name of the project nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 /*
  35  * Copyright (c) 1982, 1986, 1990, 1993
  36  *      The Regents of the University of California.  All rights reserved.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  * 1. Redistributions of source code must retain the above copyright
  42  *    notice, this list of conditions and the following disclaimer.
  43  * 2. Redistributions in binary form must reproduce the above copyright
  44  *    notice, this list of conditions and the following disclaimer in the
  45  *    documentation and/or other materials provided with the distribution.
  46  * 3. All advertising materials mentioning features or use of this software
  47  *    must display the following acknowledgement:
  48  *      This product includes software developed by the University of
  49  *      California, Berkeley and its contributors.
  50  * 4. Neither the name of the University nor the names of its contributors
  51  *    may be used to endorse or promote products derived from this software
  52  *    without specific prior written permission.
  53  *
  54  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  55  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  56  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  57  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  58  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  59  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  60  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  61  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  62  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  63  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  64  * SUCH DAMAGE.
  65  *
  66  *      @(#)in.h        8.3 (Berkeley) 1/3/94
  67  */
  68
  69 #ifndef __KAME_NETINET_IN_H_INCLUDED_
  70 #error "do not include netinet6/in6.h directly, include netinet/in.h.  see RFC2553"
  71 #endif
  72
  73 #ifndef _NETINET6_IN6_H_
  74 #define _NETINET6_IN6_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/FreeBSD"
  83
  84 #ifndef _SOCKLEN_T_DECLARED
  85 #define _SOCKLEN_T_DECLARED
  86 typedef __socklen_t     socklen_t;
  87 #endif
  88
  89 /*
  90  * Local port number conventions:
  91  *
  92  * Ports < IPPORT_RESERVED are reserved for privileged processes (e.g. root),
  93  * unless a kernel is compiled with IPNOPRIVPORTS defined.
  94  *
  95  * When a user does a bind(2) or connect(2) with a port number of zero,
  96  * a non-conflicting local port address is chosen.
  97  *
  98  * The default range is IPPORT_ANONMIN to IPPORT_ANONMAX, although
  99  * that is settable by sysctl(3); net.inet.ip.anonportmin and
 100  * net.inet.ip.anonportmax respectively.
 101  *
 102  * A user may set the IPPROTO_IP option IP_PORTRANGE to change this
 103  * default assignment range.
 104  *
 105  * The value IP_PORTRANGE_DEFAULT causes the default behavior.
 106  *
 107  * The value IP_PORTRANGE_HIGH is the same as IP_PORTRANGE_DEFAULT,
 108  * and exists only for FreeBSD compatibility purposes.
 109  *
 110  * The value IP_PORTRANGE_LOW changes the range to the "low" are
 111  * that is (by convention) restricted to privileged processes.
 112  * This convention is based on "vouchsafe" principles only.
 113  * It is only secure if you trust the remote host to restrict these ports.
 114  * The range is IPPORT_RESERVEDMIN to IPPORT_RESERVEDMAX.
 115  */
 116
 117 #define IPV6PORT_RESERVED       1024
 118 #define IPV6PORT_ANONMIN        49152
 119 #define IPV6PORT_ANONMAX        65535
 120 #define IPV6PORT_RESERVEDMIN    600
 121 #define IPV6PORT_RESERVEDMAX    (IPV6PORT_RESERVED-1)
 122
 123 /*
 124  * IPv6 address
 125  */
 126 struct in6_addr {
 127         union {
 128                 uint8_t   __u6_addr8[16];
 129                 uint16_t  __u6_addr16[8];
 130                 uint32_t  __u6_addr32[4];
 131         } __u6_addr;                    /* 128-bit IP6 address */
 132 };
 133
 134 #define s6_addr         __u6_addr.__u6_addr8
 135 #define _s6_addr16      __u6_addr.__u6_addr16           /* internal use */
 136 #define _s6_addr32      __u6_addr.__u6_addr32           /* internal use */
 137 #ifdef _KERNEL                                          /* XXX nonstandard */
 138 #define s6_addr8        __u6_addr.__u6_addr8
 139 #define s6_addr16       __u6_addr.__u6_addr16
 140 #define s6_addr32       __u6_addr.__u6_addr32
 141 #endif
 142
 143 #define INET6_ADDRSTRLEN        46
 144
 145 /*
 146  * Socket address for IPv6
 147  */
 148 #ifndef _XOPEN_SOURCE
 149 #define SIN6_LEN
 150 #endif
 151 struct sockaddr_in6 {
 152         uint8_t         sin6_len;       /* length of this struct(sa_family_t)*/
 153         uint8_t         sin6_family;    /* AF_INET6 (sa_family_t) */
 154         uint16_t        sin6_port;      /* Transport layer port # (in_port_t)*/
 155         uint32_t        sin6_flowinfo;  /* IP6 flow information */
 156         struct in6_addr sin6_addr;      /* IP6 address */
 157         uint32_t        sin6_scope_id;  /* scope zone index */
 158 };
 159
 160 /*
 161  * Local definition for masks
 162  */
 163 #ifdef _KERNEL  /* XXX nonstandard */
 164 #define IN6MASK0        {{{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }}}
 165 #define IN6MASK32       {{{ 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, \
 166                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
 167 #define IN6MASK64       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
 168                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
 169 #define IN6MASK96       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
 170                             0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00 }}}
 171 #define IN6MASK128      {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
 172                             0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}}
 173 #endif
 174
 175 #ifdef _KERNEL
 176 extern const struct sockaddr_in6 sa6_any;
 177
 178 extern const struct in6_addr in6mask0;
 179 extern const struct in6_addr in6mask32;
 180 extern const struct in6_addr in6mask64;
 181 extern const struct in6_addr in6mask96;
 182 extern const struct in6_addr in6mask128;
 183 #endif /* _KERNEL */
 184
 185 /*
 186  * Macros started with IPV6_ADDR is KAME local
 187  */
 188 #if BYTE_ORDER == BIG_ENDIAN
 189 #define _IPV6_ADDR_INT16_UL_MASK        0xffc0
 190 #define _IPV6_ADDR_INT16_ULL            0xfe80
 191 #define _IPV6_ADDR_INT16_USL            0xfec0
 192 #else
 193 #define _IPV6_ADDR_INT16_UL_MASK        0xc0ff
 194 #define _IPV6_ADDR_INT16_ULL            0x80fe
 195 #define _IPV6_ADDR_INT16_USL            0xc0fe
 196 #endif
 197
 198 #ifdef _KERNEL  /* XXX nonstandard */
 199 #if BYTE_ORDER == BIG_ENDIAN
 200 #define IPV6_ADDR_INT32_ONE     1
 201 #define IPV6_ADDR_INT32_TWO     2
 202 #define IPV6_ADDR_INT32_MNL     0xff010000
 203 #define IPV6_ADDR_INT32_MLL     0xff020000
 204 #define IPV6_ADDR_INT32_SMP     0x0000ffff
 205 #define IPV6_ADDR_INT16_MLL     0xff02
 206 #elif BYTE_ORDER == LITTLE_ENDIAN
 207 #define IPV6_ADDR_INT32_ONE     0x01000000
 208 #define IPV6_ADDR_INT32_TWO     0x02000000
 209 #define IPV6_ADDR_INT32_MNL     0x000001ff
 210 #define IPV6_ADDR_INT32_MLL     0x000002ff
 211 #define IPV6_ADDR_INT32_SMP     0xffff0000
 212 #define IPV6_ADDR_INT16_MLL     0x02ff
 213 #endif
 214 #define IPV6_ADDR_INT16_ULL     _IPV6_ADDR_INT16_ULL
 215 #define IPV6_ADDR_INT16_USL     _IPV6_ADDR_INT16_USL
 216 #endif
 217
 218 /*
 219  * Definition of some useful macros to handle IP6 addresses
 220  */
 221 #define IN6ADDR_ANY_INIT                                                \
 222         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             \
 223             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
 224 #define IN6ADDR_LOOPBACK_INIT                                           \
 225         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             \
 226             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 227 #define IN6ADDR_NODELOCAL_ALLNODES_INIT                                 \
 228         {{{ 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             \
 229             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 230 #define IN6ADDR_LINKLOCAL_ALLNODES_INIT                                 \
 231         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             \
 232             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 233 #define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT                               \
 234         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             \
 235             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}}
 236
 237 #ifdef _KERNEL
 238 extern const struct in6_addr kin6addr_any;
 239 extern const struct in6_addr kin6addr_loopback;
 240 extern const struct in6_addr kin6addr_nodelocal_allnodes;
 241 extern const struct in6_addr kin6addr_linklocal_allnodes;
 242 extern const struct in6_addr kin6addr_linklocal_allrouters;
 243 #else
 244 extern const struct in6_addr in6addr_any;
 245 extern const struct in6_addr in6addr_loopback;
 246 extern const struct in6_addr in6addr_nodelocal_allnodes;
 247 extern const struct in6_addr in6addr_linklocal_allnodes;
 248 #endif
 249
 250 #define IN6_ARE_ADDR_EQUAL(a, b)                                        \
 251     (memcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
 252
 253 #ifdef _KERNEL                  /* non standard */
 254 /* see if two addresses are equal in a scope-conscious manner. */
 255 #define SA6_ARE_ADDR_EQUAL(a, b) \
 256         (((a)->sin6_scope_id == 0 || (b)->sin6_scope_id == 0 ||         \
 257           (a)->sin6_scope_id == (b)->sin6_scope_id) &&                  \
 258          (bcmp(&(a)->sin6_addr, &(b)->sin6_addr, sizeof(struct in6_addr)) == 0))
 259 #endif
 260
 261 /*
 262  * Unspecified
 263  */
 264 #define IN6_IS_ADDR_UNSPECIFIED(a)                                      \
 265         ((a)->_s6_addr32[0] == 0 && (a)->_s6_addr32[1] == 0 &&          \
 266          (a)->_s6_addr32[2] == 0 && (a)->_s6_addr32[3] == 0)
 267
 268 /*
 269  * Loopback
 270  */
 271 #define IN6_IS_ADDR_LOOPBACK(a)                                         \
 272         ((a)->_s6_addr32[0] == 0 && (a)->_s6_addr32[1] == 0 &&  \
 273          (a)->_s6_addr32[2] == 0 && (a)->_s6_addr32[3] == ntohl(1))
 274
 275 /*
 276  * Mapped
 277  */
 278 #define IN6_IS_ADDR_V4MAPPED(a)                                         \
 279         ((a)->_s6_addr32[0] == 0 && (a)->_s6_addr32[1] == 0 &&          \
 280          (a)->_s6_addr32[2] == ntohl(0x0000ffff))
 281
 282 /*
 283  * IPv4 compatible.  Deprecated by RFC4291.
 284  */
 285 #define IN6_IS_ADDR_V4COMPAT(a)                                         \
 286         ((a)->_s6_addr32[0] == 0 &&                                     \
 287          (a)->_s6_addr32[1] == 0 &&                                     \
 288          (a)->_s6_addr32[2] == 0 &&                                     \
 289          (a)->_s6_addr32[3] != 0 && (a)->_s6_addr32[3] != ntohl(1))
 290
 291 /*
 292  * KAME Scope Values
 293  */
 294
 295 #define __IPV6_ADDR_SCOPE_NODELOCAL     0x01
 296 #define __IPV6_ADDR_SCOPE_LINKLOCAL     0x02
 297 #define __IPV6_ADDR_SCOPE_SITELOCAL     0x05
 298 #define __IPV6_ADDR_SCOPE_ORGLOCAL      0x08    /* just used in this file */
 299 #define __IPV6_ADDR_SCOPE_GLOBAL        0x0e
 300
 301 #ifdef _KERNEL                                  /* XXX nonstandard */
 302 #define IPV6_ADDR_SCOPE_NODELOCAL       0x01
 303 #define IPV6_ADDR_SCOPE_LINKLOCAL       0x02
 304 #define IPV6_ADDR_SCOPE_SITELOCAL       0x05
 305 #define IPV6_ADDR_SCOPE_ORGLOCAL        0x08    /* just used in this file */
 306 #define IPV6_ADDR_SCOPE_GLOBAL          0x0e
 307 #endif
 308
 309 /*
 310  * Unicast Scope
 311  * Note that we must check topmost 10 bits only, not 16 bits (see RFC2373).
 312  */
 313 #define IN6_IS_ADDR_LINKLOCAL(a)                                        \
 314     (((a)->_s6_addr16[0] & _IPV6_ADDR_INT16_UL_MASK) == _IPV6_ADDR_INT16_ULL)
 315 #define IN6_IS_ADDR_SITELOCAL(a)                                        \
 316     (((a)->_s6_addr16[0] & _IPV6_ADDR_INT16_UL_MASK) == _IPV6_ADDR_INT16_USL)
 317
 318 /*
 319  * Multicast
 320  */
 321 #define IN6_IS_ADDR_MULTICAST(a)        ((a)->s6_addr[0] == 0xff)
 322 #define __IPV6_ADDR_MC_SCOPE(a)         ((a)->s6_addr[1] & 0x0f)
 323 #ifdef _KERNEL                                  /* XXX nonstandard */
 324 #define IPV6_ADDR_MC_SCOPE(a)           __IPV6_ADDR_MC_SCOPE(a)
 325 #endif
 326
 327 /*
 328  * Multicast Scope
 329  */
 330 #define IN6_IS_ADDR_MC_NODELOCAL(a)                                     \
 331         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
 332          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_NODELOCAL))
 333
 334 #define IN6_IS_ADDR_MC_LINKLOCAL(a)                                     \
 335         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
 336          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_LINKLOCAL))
 337
 338 #define IN6_IS_ADDR_MC_SITELOCAL(a)                                     \
 339         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
 340          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_SITELOCAL))
 341
 342 #define IN6_IS_ADDR_MC_ORGLOCAL(a)                                      \
 343         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
 344          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_ORGLOCAL))
 345
 346 #define IN6_IS_ADDR_MC_GLOBAL(a)                                        \
 347         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
 348          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_GLOBAL))
 349
 350 #ifdef _KERNEL  /* nonstandard */
 351 /*
 352  * KAME Scope
 353  */
 354 #define IN6_IS_SCOPE_LINKLOCAL(a)                                       \
 355         (IN6_IS_ADDR_LINKLOCAL(a) || IN6_IS_ADDR_MC_LINKLOCAL(a))
 356
 357 #define IFA6_IS_DEPRECATED(a)                                           \
 358         ((a)->ia6_lifetime.ia6t_preferred != 0 &&                       \
 359          (a)->ia6_lifetime.ia6t_preferred < time_second)
 360
 361 #define IFA6_IS_INVALID(a)                                              \
 362         ((a)->ia6_lifetime.ia6t_expire != 0 &&                          \
 363          (a)->ia6_lifetime.ia6t_expire < time_second)
 364 #endif
 365
 366 /*
 367  * IP6 route structure
 368  */
 369 #ifndef _XOPEN_SOURCE
 370 struct route_in6 {
 371         struct rtentry          *ro_rt;
 372         struct sockaddr_in6     ro_dst;
 373 };
 374 #endif
 375
 376 /*
 377  * Options for use with [gs]etsockopt at the IPV6 level.
 378  * First word of comment is data type; bool is stored in int.
 379  */
 380 /* no hdrincl */
 381 #if 0 /* the followings are relic in IPv4 and hence are disabled */
 382 #define IPV6_OPTIONS            1  /* buf/ip6_opts; set/get IP6 options */
 383 #define IPV6_RECVOPTS           5  /* bool; receive all IP6 opts w/dgram */
 384 #define IPV6_RECVRETOPTS        6  /* bool; receive IP6 opts for response */
 385 #define IPV6_RECVDSTADDR        7  /* bool; receive IP6 dst addr w/dgram */
 386 #define IPV6_RETOPTS            8  /* ip6_opts; set/get IP6 options */
 387 #endif
 388 #define IPV6_SOCKOPT_RESERVED1  3  /* reserved for future use */
 389 #define IPV6_UNICAST_HOPS       4  /* int; IP6 hops */
 390 #define IPV6_MULTICAST_IF       9  /* u_int; set/get IP6 multicast i/f  */
 391 #define IPV6_MULTICAST_HOPS     10 /* int; set/get IP6 multicast hops */
 392 #define IPV6_MULTICAST_LOOP     11 /* u_int; set/get IP6 multicast loopback */
 393 #define IPV6_JOIN_GROUP         12 /* ip6_mreq; join a group membership */
 394 #define IPV6_LEAVE_GROUP        13 /* ip6_mreq; leave a group membership */
 395 #define IPV6_PORTRANGE          14 /* int; range to choose for unspec port */
 396 #define ICMP6_FILTER            18 /* icmp6_filter; icmp6 filter */
 397 /* RFC2292 options */
 398 #ifdef _KERNEL
 399 #define IPV6_2292PKTINFO        19 /* bool; send/recv if, src/dst addr */
 400 #define IPV6_2292HOPLIMIT       20 /* bool; hop limit */
 401 #define IPV6_2292NEXTHOP        21 /* bool; next hop addr */
 402 #define IPV6_2292HOPOPTS        22 /* bool; hop-by-hop option */
 403 #define IPV6_2292DSTOPTS        23 /* bool; destinaion option */
 404 #define IPV6_2292RTHDR          24 /* bool; routing header */
 405 #define IPV6_2292PKTOPTIONS     25 /* buf/cmsghdr; set/get IPv6 options */
 406 #endif
 407
 408 #define IPV6_CHECKSUM           26 /* int; checksum offset for raw socket */
 409 #define IPV6_V6ONLY             27 /* bool; only bind INET6 at wildcard bind */
 410 #ifndef _KERNEL
 411 #define IPV6_BINDV6ONLY         IPV6_V6ONLY
 412 #endif
 413
 414 #if 1 /* IPSEC */
 415 #define IPV6_IPSEC_POLICY       28 /* struct; get/set security policy */
 416 #endif
 417 #define IPV6_FAITH              29 /* bool; accept FAITH'ed connections */
 418
 419 #if 1 /* IPV6FIREWALL */
 420 #define IPV6_FW_ADD             30 /* add a firewall rule to chain */
 421 #define IPV6_FW_DEL             31 /* delete a firewall rule from chain */
 422 #define IPV6_FW_FLUSH           32 /* flush firewall rule chain */
 423 #define IPV6_FW_ZERO            33 /* clear single/all firewall counter(s) */
 424 #define IPV6_FW_GET             34 /* get entire firewall rule chain */
 425 #endif
 426
 427 /*
 428  * new socket options introduced in RFC3542
 429  */
 430 #define IPV6_RTHDRDSTOPTS       35 /* ip6_dest; send dst option before rthdr */
 431 #define IPV6_RECVPKTINFO        36 /* bool; recv if, dst addr */
 432 #define IPV6_RECVHOPLIMIT       37 /* bool; recv hop limit */
 433 #define IPV6_RECVRTHDR          38 /* bool; recv routing header */
 434 #define IPV6_RECVHOPOPTS        39 /* bool; recv hop-by-hop option */
 435 #define IPV6_RECVDSTOPTS        40 /* bool; recv dst option after rthdr */
 436 #ifdef _KERNEL
 437 #define IPV6_RECVRTHDRDSTOPTS   41 /* bool; recv dst option before rthdr */
 438 #endif
 439 #define IPV6_USE_MIN_MTU        42 /* bool; send packets at the minimum MTU */
 440 #define IPV6_RECVPATHMTU        43 /* bool; notify an according MTU */
 441
 442 /* mtuinfo; get the current path MTU (sopt),
 443  * 4 bytes int; MTU notification (cmsg)
 444  */
 445 #define IPV6_PATHMTU            44
 446 #if 0 /*obsoleted during 2292bis -> 3542*/
 447 #define IPV6_REACHCONF          45 /* no data; ND reachability confirm
 448                                       (cmsg only/not in of RFC3542) */
 449 #endif
 450 #define IPV6_PKTINFO            46 /* in6_pktinfo; send if, src addr */
 451 #define IPV6_HOPLIMIT           47 /* int; send hop limit */
 452 #define IPV6_NEXTHOP            48 /* sockaddr; next hop addr */
 453 #define IPV6_HOPOPTS            49 /* ip6_hbh; send hop-by-hop option */
 454 #define IPV6_DSTOPTS            50 /* ip6_dest; send dst option befor rthdr */
 455 #define IPV6_RTHDR              51 /* ip6_rthdr; send routing header */
 456 #define IPV6_PKTOPTIONS         52 /* buf/cmsghdr; set/get IPv6 options, this is obsoleted by RFC3542 */
 457
 458 #define IPV6_RECVTCLASS         57 /* bool; recv traffic class values */
 459
 460 #define IPV6_AUTOFLOWLABEL      59 /* bool; attach flowlabel automagically */
 461
 462 #define IPV6_TCLASS             61 /* int; send traffic class value */
 463 #define IPV6_DONTFRAG           62 /* bool; disable IPv6 fragmentation */
 464
 465 #define IPV6_PREFER_TEMPADDR    63 /* int; prefer temporary addresses as
 466                                     * the source address.
 467                                     */
 468 /*
 469  * The following option is private; do not use it from user applications.
 470  * It is deliberately defined to the same value as IP_MSFILTER.
 471  */
 472 #define IPV6_MSFILTER           74 /* struct __msfilterreq;
 473                                     * set/get multicast source filter list.
 474                                     */
 475 /* to define items, should talk with KAME guys first, for *BSD compatibility */
 476
 477 #define IPV6_RTHDR_LOOSE     0 /* this hop need not be a neighbor. XXX old spec */
 478 #define IPV6_RTHDR_STRICT    1 /* this hop must be a neighbor. XXX old spec */
 479 #define IPV6_RTHDR_TYPE_0    0 /* IPv6 routing header type 0 */
 480
 481 /*
 482  * Defaults and limits for options
 483  */
 484 #define IPV6_DEFAULT_MULTICAST_HOPS 1   /* normally limit m'casts to 1 hop */
 485 #define IPV6_DEFAULT_MULTICAST_LOOP 1   /* normally hear sends if a member */
 486
 487 /*
 488  * Argument structure for IPV6_JOIN_GROUP and IPV6_LEAVE_GROUP.
 489  */
 490 struct ipv6_mreq {
 491         struct in6_addr ipv6mr_multiaddr;
 492         unsigned int    ipv6mr_interface;
 493 };
 494
 495 /*
 496  * IPV6_PKTINFO: Packet information(RFC2292 sec 5)
 497  */
 498 struct in6_pktinfo {
 499         struct in6_addr ipi6_addr;      /* src/dst IPv6 address */
 500         unsigned int    ipi6_ifindex;   /* send/recv interface index */
 501 };
 502
 503 /*
 504  * New Control structure for IPV6_RECVPATHMTU socket option introduced in RFC3542.
 505  */
 506 struct ip6_mtuinfo {
 507         struct sockaddr_in6 ip6m_addr;  /* or sockaddr_storage? */
 508         uint32_t ip6m_mtu;
 509 };
 510
 511 /*
 512  * Argument for IPV6_PORTRANGE:
 513  * - which range to search when port is unspecified at bind() or connect()
 514  */
 515 #define IPV6_PORTRANGE_DEFAULT  0       /* default range */
 516 #define IPV6_PORTRANGE_HIGH     1       /* "high" - request firewall bypass */
 517 #define IPV6_PORTRANGE_LOW      2       /* "low" - vouchsafe security */
 518
 519 #ifndef _XOPEN_SOURCE
 520 /*
 521  * Definitions for inet6 sysctl operations.
 522  *
 523  * Third level is protocol number.
 524  * Fourth level is desired variable within that protocol.
 525  */
 526 #define IPV6PROTO_MAXID (IPPROTO_PIM + 1)       /* don't list to IPV6PROTO_MAX */
 527
 528 #define CTL_IPV6PROTO_NAMES {                                   \
 529         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 530         { 0, 0 },                                               \
 531         { "tcp6", CTLTYPE_NODE },                               \
 532         { 0, 0 },                                               \
 533         { 0, 0 },                                               \
 534         { 0, 0 },                                               \
 535         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 536         { 0, 0 },                                               \
 537         { 0, 0 },                                               \
 538         { "udp6", CTLTYPE_NODE },                               \
 539         { 0, 0 },                                               \
 540         { 0, 0 },                                               \
 541         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 542         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 543         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 544         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 545         { 0, 0 },                                               \
 546         { "ip6", CTLTYPE_NODE },                                \
 547         { 0, 0 },                                               \
 548         { 0, 0 },                                               \
 549         { 0, 0 },                                               \
 550         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 551         { 0, 0 },                                               \
 552         { "ipsec6", CTLTYPE_NODE },                             \
 553         { 0, 0 },                                               \
 554         { 0, 0 },                                               \
 555         { 0, 0 },                                               \
 556         { 0, 0 },                                               \
 557         { 0, 0 },                                               \
 558         { 0, 0 },                                               \
 559         { "icmp6", CTLTYPE_NODE },                              \
 560         { 0, 0 },                                               \
 561         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 562         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 563         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 564         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 565         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 566         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 567         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 568         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 569         { 0, 0 },                                               \
 570         { 0, 0 },                                               \
 571         { 0, 0 },                                               \
 572         { "pim6", CTLTYPE_NODE },                               \
 573 }
 574
 575 /*
 576  * Names for IP sysctl objects
 577  */
 578 #define IPV6CTL_FORWARDING      1       /* act as router */
 579 #define IPV6CTL_SENDREDIRECTS   2       /* may send redirects when forwarding*/
 580 #define IPV6CTL_DEFHLIM         3       /* default Hop-Limit */
 581 #ifdef notyet
 582 #define IPV6CTL_DEFMTU          4       /* default MTU */
 583 #endif
 584 #define IPV6CTL_FORWSRCRT       5       /* forward source-routed dgrams */
 585 #define IPV6CTL_STATS           6       /* stats */
 586 #define IPV6CTL_MRTSTATS        7       /* multicast forwarding stats */
 587 #define IPV6CTL_MRTPROTO        8       /* multicast routing protocol */
 588 #define IPV6CTL_MAXFRAGPACKETS  9       /* max packets reassembly queue */
 589 #define IPV6CTL_SOURCECHECK     10      /* verify source route and intf */
 590 #define IPV6CTL_SOURCECHECK_LOGINT 11   /* minimume logging interval */
 591 #define IPV6CTL_ACCEPT_RTADV    12
 592 #define IPV6CTL_KEEPFAITH       13
 593 #define IPV6CTL_LOG_INTERVAL    14
 594 #define IPV6CTL_HDRNESTLIMIT    15
 595 #define IPV6CTL_DAD_COUNT       16
 596 #define IPV6CTL_AUTO_FLOWLABEL  17
 597 #define IPV6CTL_DEFMCASTHLIM    18
 598 #define IPV6CTL_GIF_HLIM        19      /* default HLIM for gif encap packet */
 599 #define IPV6CTL_KAME_VERSION    20
 600 #define IPV6CTL_USE_DEPRECATED  21      /* use deprecated addr (RFC2462 5.5.4) */
 601 #define IPV6CTL_RR_PRUNE        22      /* walk timer for router renumbering */
 602 #if 0   /* obsolete */
 603 #define IPV6CTL_MAPPED_ADDR     23
 604 #endif
 605 #define IPV6CTL_V6ONLY          24
 606 #define IPV6CTL_RTEXPIRE        25      /* cloned route expiration time */
 607 #define IPV6CTL_RTMINEXPIRE     26      /* min value for expiration time */
 608 #define IPV6CTL_RTMAXCACHE      27      /* trigger level for dynamic expire */
 609
 610 #define IPV6CTL_USETEMPADDR     32      /* use temporary addresses (RFC3041) */
 611 #define IPV6CTL_TEMPPLTIME      33      /* preferred lifetime for tmpaddrs */
 612 #define IPV6CTL_TEMPVLTIME      34      /* valid lifetime for tmpaddrs */
 613 #define IPV6CTL_AUTO_LINKLOCAL  35      /* automatic link-local addr assign */
 614 #define IPV6CTL_RIP6STATS       36      /* raw_ip6 stats */
 615
 616 #define IPV6CTL_ADDRCTLPOLICY   38      /* get/set address selection policy */
 617
 618 /* New entries should be added here from current IPV6CTL_MAXID value. */
 619 /* to define items, should talk with KAME guys first, for *BSD compatibility */
 620 #define IPV6CTL_MAXID           42
 621
 622 #endif /* !_XOPEN_SOURCE */
 623
 624 /*
 625  * Redefinition of mbuf flags
 626  */
 627 #define M_AUTHIPHDR     M_PROTO2
 628 #define M_DECRYPTED     M_PROTO3
 629 #define M_LOOP          M_PROTO4
 630 #define M_AUTHIPDGM     M_PROTO5
 631
 632 #ifdef _KERNEL
 633
 634 struct ifnet;
 635 struct mbuf;
 636 struct sockaddr;
 637 struct sockaddr_in;
 638 struct sockaddr_in6;
 639
 640 int     in6_cksum (struct mbuf *, uint8_t, uint32_t, uint32_t);
 641 int     in6_localaddr (struct in6_addr *);
 642 int     in6_addrscope (struct in6_addr *);
 643 struct  in6_ifaddr *in6_ifawithscope (struct ifnet *, struct in6_addr *);
 644 struct  in6_ifaddr *in6_ifawithifp (struct ifnet *, struct in6_addr *);
 645 void    in6_if_up (struct ifnet *);
 646
 647 void    in6_sin6_2_sin (struct sockaddr_in *sin, struct sockaddr_in6 *sin6);
 648 void    in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6);
 649 void    in6_sin6_2_sin_in_sock (struct sockaddr *nam);
 650 void    in6_sin_2_v4mapsin6_in_sock (struct sockaddr **nam);
 651 void    addrsel_policy_init (void);
 652
 653 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
 654 #define sin6tosa(sin6)  ((struct sockaddr *)(sin6))
 655 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
 656
 657 extern int (*faithprefix_p)(struct in6_addr *);
 658 #endif /* _KERNEL */
 659
 660 #include <sys/cdefs.h>          /* for __BEGIN_DECLS and __END_DECLS */
 661
 662 __BEGIN_DECLS
 663 struct cmsghdr;
 664
 665 uint8_t *inet6_option_alloc (struct cmsghdr *, int, int, int);
 666 int inet6_option_append (struct cmsghdr *, const uint8_t *, int, int);
 667 int inet6_option_find (const struct cmsghdr *, uint8_t **, int);
 668 int inet6_option_init (void *, struct cmsghdr **, int);
 669 int inet6_option_next (const struct cmsghdr *, uint8_t **);
 670 int inet6_option_space (int);
 671
 672 int inet6_opt_append (void *, socklen_t, int, uint8_t, socklen_t, uint8_t, void **);
 673 int inet6_opt_find (void *, socklen_t, int, uint8_t, socklen_t *, void **);
 674 int inet6_opt_finish (void *, socklen_t, int);
 675 int inet6_opt_get_val (void *, int, void *, socklen_t);
 676 int inet6_opt_init (void *, socklen_t);
 677 int inet6_opt_next (void *, socklen_t, int, uint8_t *, socklen_t *, void **);
 678 int inet6_opt_set_val (void *, int, void *, socklen_t);
 679
 680 int              inet6_rth_add (void *, const struct in6_addr *);
 681 struct in6_addr *inet6_rth_getaddr (const void *, int);
 682 void            *inet6_rth_init (void *, socklen_t, int, int);
 683 int              inet6_rth_reverse (const void *, void *);
 684 int              inet6_rth_segments (const void *);
 685 socklen_t        inet6_rth_space (int, int);
 686
 687 int              inet6_rthdr_add (struct cmsghdr *, const struct in6_addr *,
 688                                   unsigned int);
 689 struct in6_addr *inet6_rthdr_getaddr (struct cmsghdr *, int);
 690 int              inet6_rthdr_getflags (const struct cmsghdr *, int);
 691 struct cmsghdr  *inet6_rthdr_init (void *, int);
 692 int              inet6_rthdr_lasthop (struct cmsghdr *, unsigned int);
 693 #if 0                                   /* not implemented yet */
 694 int              inet6_rthdr_reverse (const struct cmsghdr *, struct cmsghdr *);
 695 #endif
 696 int              inet6_rthdr_segments (const struct cmsghdr *);
 697 size_t           inet6_rthdr_space (int, int);
 698 __END_DECLS
 699
 700 #endif /* !_NETINET6_IN6_H_ */