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 1.8 2006/11/03 00:54:55 hsu 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 /*
  85  * Local port number conventions:
  86  *
  87  * Ports < IPPORT_RESERVED are reserved for privileged processes (e.g. root),
  88  * unless a kernel is compiled with IPNOPRIVPORTS defined.
  89  *
  90  * When a user does a bind(2) or connect(2) with a port number of zero,
  91  * a non-conflicting local port address is chosen.
  92  *
  93  * The default range is IPPORT_ANONMIN to IPPORT_ANONMAX, although
  94  * that is settable by sysctl(3); net.inet.ip.anonportmin and
  95  * net.inet.ip.anonportmax respectively.
  96  *
  97  * A user may set the IPPROTO_IP option IP_PORTRANGE to change this
  98  * default assignment range.
  99  *
 100  * The value IP_PORTRANGE_DEFAULT causes the default behavior.
 101  *
 102  * The value IP_PORTRANGE_HIGH is the same as IP_PORTRANGE_DEFAULT,
 103  * and exists only for FreeBSD compatibility purposes.
 104  *
 105  * The value IP_PORTRANGE_LOW changes the range to the "low" are
 106  * that is (by convention) restricted to privileged processes.
 107  * This convention is based on "vouchsafe" principles only.
 108  * It is only secure if you trust the remote host to restrict these ports.
 109  * The range is IPPORT_RESERVEDMIN to IPPORT_RESERVEDMAX.
 110  */
 111
 112 #define IPV6PORT_RESERVED       1024
 113 #define IPV6PORT_ANONMIN        49152
 114 #define IPV6PORT_ANONMAX        65535
 115 #define IPV6PORT_RESERVEDMIN    600
 116 #define IPV6PORT_RESERVEDMAX    (IPV6PORT_RESERVED-1)
 117
 118 /*
 119  * IPv6 address
 120  */
 121 struct in6_addr {
 122         union {
 123                 uint8_t   __u6_addr8[16];
 124                 uint16_t  __u6_addr16[8];
 125                 uint32_t  __u6_addr32[4];
 126         } __u6_addr;                    /* 128-bit IP6 address */
 127 };
 128
 129 #define s6_addr         __u6_addr.__u6_addr8
 130 #define _s6_addr16      __u6_addr.__u6_addr16           /* internal use */
 131 #define _s6_addr32      __u6_addr.__u6_addr32           /* internal use */
 132 #ifdef _KERNEL                                          /* XXX nonstandard */
 133 #define s6_addr8        __u6_addr.__u6_addr8
 134 #define s6_addr16       __u6_addr.__u6_addr16
 135 #define s6_addr32       __u6_addr.__u6_addr32
 136 #endif
 137
 138 #define INET6_ADDRSTRLEN        46
 139
 140 /*
 141  * Socket address for IPv6
 142  */
 143 #ifndef _XOPEN_SOURCE
 144 #define SIN6_LEN
 145 #endif
 146 struct sockaddr_in6 {
 147         uint8_t         sin6_len;       /* length of this struct(sa_family_t)*/
 148         uint8_t         sin6_family;    /* AF_INET6 (sa_family_t) */
 149         uint16_t        sin6_port;      /* Transport layer port # (in_port_t)*/
 150         uint32_t        sin6_flowinfo;  /* IP6 flow information */
 151         struct in6_addr sin6_addr;      /* IP6 address */
 152         uint32_t        sin6_scope_id;  /* scope zone index */
 153 };
 154
 155 /*
 156  * Local definition for masks
 157  */
 158 #ifdef _KERNEL  /* XXX nonstandard */
 159 #define IN6MASK0        {{{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }}}
 160 #define IN6MASK32       {{{ 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, \
 161                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
 162 #define IN6MASK64       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
 163                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
 164 #define IN6MASK96       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
 165                             0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00 }}}
 166 #define IN6MASK128      {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
 167                             0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}}
 168 #endif
 169
 170 #ifdef _KERNEL
 171 extern const struct sockaddr_in6 sa6_any;
 172
 173 extern const struct in6_addr in6mask0;
 174 extern const struct in6_addr in6mask32;
 175 extern const struct in6_addr in6mask64;
 176 extern const struct in6_addr in6mask96;
 177 extern const struct in6_addr in6mask128;
 178 #endif /* _KERNEL */
 179
 180 /*
 181  * Macros started with IPV6_ADDR is KAME local
 182  */
 183 #if BYTE_ORDER == BIG_ENDIAN
 184 #define _IPV6_ADDR_INT16_UL_MASK        0xffc0
 185 #define _IPV6_ADDR_INT16_ULL            0xfe80
 186 #define _IPV6_ADDR_INT16_USL            0xfec0
 187 #else
 188 #define _IPV6_ADDR_INT16_UL_MASK        0xc0ff
 189 #define _IPV6_ADDR_INT16_ULL            0x80fe
 190 #define _IPV6_ADDR_INT16_USL            0xc0fe
 191 #endif
 192
 193 #ifdef _KERNEL  /* XXX nonstandard */
 194 #if BYTE_ORDER == BIG_ENDIAN
 195 #define IPV6_ADDR_INT32_ONE     1
 196 #define IPV6_ADDR_INT32_TWO     2
 197 #define IPV6_ADDR_INT32_MNL     0xff010000
 198 #define IPV6_ADDR_INT32_MLL     0xff020000
 199 #define IPV6_ADDR_INT32_SMP     0x0000ffff
 200 #define IPV6_ADDR_INT16_MLL     0xff02
 201 #elif BYTE_ORDER == LITTLE_ENDIAN
 202 #define IPV6_ADDR_INT32_ONE     0x01000000
 203 #define IPV6_ADDR_INT32_TWO     0x02000000
 204 #define IPV6_ADDR_INT32_MNL     0x000001ff
 205 #define IPV6_ADDR_INT32_MLL     0x000002ff
 206 #define IPV6_ADDR_INT32_SMP     0xffff0000
 207 #define IPV6_ADDR_INT16_MLL     0x02ff
 208 #endif
 209 #define IPV6_ADDR_INT16_ULL     _IPV6_ADDR_INT16_ULL
 210 #define IPV6_ADDR_INT16_USL     _IPV6_ADDR_INT16_USL
 211 #endif
 212
 213 /*
 214  * Definition of some useful macros to handle IP6 addresses
 215  */
 216 #define IN6ADDR_ANY_INIT                                                \
 217         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             \
 218             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
 219 #define IN6ADDR_LOOPBACK_INIT                                           \
 220         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             \
 221             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 222 #define IN6ADDR_NODELOCAL_ALLNODES_INIT                                 \
 223         {{{ 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             \
 224             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 225 #define IN6ADDR_LINKLOCAL_ALLNODES_INIT                                 \
 226         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             \
 227             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 228 #define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT                               \
 229         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             \
 230             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}}
 231
 232 #ifdef _KERNEL
 233 extern const struct in6_addr kin6addr_any;
 234 extern const struct in6_addr kin6addr_loopback;
 235 extern const struct in6_addr kin6addr_nodelocal_allnodes;
 236 extern const struct in6_addr kin6addr_linklocal_allnodes;
 237 extern const struct in6_addr kin6addr_linklocal_allrouters;
 238 #else
 239 extern const struct in6_addr in6addr_any;
 240 extern const struct in6_addr in6addr_loopback;
 241 extern const struct in6_addr in6addr_nodelocal_allnodes;
 242 extern const struct in6_addr in6addr_linklocal_allnodes;
 243 #endif
 244
 245 #define IN6_ARE_ADDR_EQUAL(a, b)                                        \
 246     (memcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
 247
 248 #ifdef _KERNEL                  /* non standard */
 249 /* see if two addresses are equal in a scope-conscious manner. */
 250 #define SA6_ARE_ADDR_EQUAL(a, b) \
 251         (((a)->sin6_scope_id == 0 || (b)->sin6_scope_id == 0 ||         \
 252           (a)->sin6_scope_id == (b)->sin6_scope_id) &&                  \
 253          (bcmp(&(a)->sin6_addr, &(b)->sin6_addr, sizeof(struct in6_addr)) == 0))
 254 #endif
 255
 256 /*
 257  * Unspecified
 258  */
 259 #define IN6_IS_ADDR_UNSPECIFIED(a)                                      \
 260         ((a)->_s6_addr32[0] == 0 && (a)->_s6_addr32[1] == 0 &&          \
 261          (a)->_s6_addr32[2] == 0 && (a)->_s6_addr32[3] == 0)
 262
 263 /*
 264  * Loopback
 265  */
 266 #define IN6_IS_ADDR_LOOPBACK(a)                                         \
 267         ((a)->_s6_addr32[0] == 0 && (a)->_s6_addr32[1] == 0 &&  \
 268          (a)->_s6_addr32[2] == 0 && (a)->_s6_addr32[3] == ntohl(1))
 269
 270 /*
 271  * Mapped
 272  */
 273 #define IN6_IS_ADDR_V4MAPPED(a)                                         \
 274         ((a)->_s6_addr32[0] == 0 && (a)->_s6_addr32[1] == 0 &&          \
 275          (a)->_s6_addr32[2] == ntohl(0x0000ffff))
 276
 277 /*
 278  * IPv4 compatible.  Deprecated by RFC4291.
 279  */
 280 #define IN6_IS_ADDR_V4COMPAT(a)                                         \
 281         ((a)->_s6_addr32[0] == 0 &&                                     \
 282          (a)->_s6_addr32[1] == 0 &&                                     \
 283          (a)->_s6_addr32[2] == 0 &&                                     \
 284          (a)->_s6_addr32[3] != 0 && (a)->_s6_addr32[3] != ntohl(1))
 285
 286 /*
 287  * KAME Scope Values
 288  */
 289
 290 #define __IPV6_ADDR_SCOPE_NODELOCAL     0x01
 291 #define __IPV6_ADDR_SCOPE_LINKLOCAL     0x02
 292 #define __IPV6_ADDR_SCOPE_SITELOCAL     0x05
 293 #define __IPV6_ADDR_SCOPE_ORGLOCAL      0x08    /* just used in this file */
 294 #define __IPV6_ADDR_SCOPE_GLOBAL        0x0e
 295
 296 #ifdef _KERNEL                                  /* XXX nonstandard */
 297 #define IPV6_ADDR_SCOPE_NODELOCAL       0x01
 298 #define IPV6_ADDR_SCOPE_LINKLOCAL       0x02
 299 #define IPV6_ADDR_SCOPE_SITELOCAL       0x05
 300 #define IPV6_ADDR_SCOPE_ORGLOCAL        0x08    /* just used in this file */
 301 #define IPV6_ADDR_SCOPE_GLOBAL          0x0e
 302 #endif
 303
 304 /*
 305  * Unicast Scope
 306  * Note that we must check topmost 10 bits only, not 16 bits (see RFC2373).
 307  */
 308 #define IN6_IS_ADDR_LINKLOCAL(a)                                        \
 309     (((a)->_s6_addr16[0] & _IPV6_ADDR_INT16_UL_MASK) == _IPV6_ADDR_INT16_ULL)
 310 #define IN6_IS_ADDR_SITELOCAL(a)                                        \
 311     (((a)->_s6_addr16[0] & _IPV6_ADDR_INT16_UL_MASK) == _IPV6_ADDR_INT16_USL)
 312
 313 /*
 314  * Multicast
 315  */
 316 #define IN6_IS_ADDR_MULTICAST(a)        ((a)->s6_addr[0] == 0xff)
 317 #define __IPV6_ADDR_MC_SCOPE(a)         ((a)->s6_addr[1] & 0x0f)
 318 #ifdef _KERNEL                                  /* XXX nonstandard */
 319 #define IPV6_ADDR_MC_SCOPE(a)           __IPV6_ADDR_MC_SCOPE(a)
 320 #endif
 321
 322 /*
 323  * Multicast Scope
 324  */
 325 #define IN6_IS_ADDR_MC_NODELOCAL(a)                                     \
 326         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
 327          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_NODELOCAL))
 328
 329 #define IN6_IS_ADDR_MC_LINKLOCAL(a)                                     \
 330         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
 331          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_LINKLOCAL))
 332
 333 #define IN6_IS_ADDR_MC_SITELOCAL(a)                                     \
 334         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
 335          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_SITELOCAL))
 336
 337 #define IN6_IS_ADDR_MC_ORGLOCAL(a)                                      \
 338         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
 339          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_ORGLOCAL))
 340
 341 #define IN6_IS_ADDR_MC_GLOBAL(a)                                        \
 342         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
 343          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_GLOBAL))
 344
 345 #ifdef _KERNEL  /* nonstandard */
 346 /*
 347  * KAME Scope
 348  */
 349 #define IN6_IS_SCOPE_LINKLOCAL(a)                                       \
 350         (IN6_IS_ADDR_LINKLOCAL(a) || IN6_IS_ADDR_MC_LINKLOCAL(a))
 351
 352 #define IFA6_IS_DEPRECATED(a)                                           \
 353         ((a)->ia6_lifetime.ia6t_preferred != 0 &&                       \
 354          (a)->ia6_lifetime.ia6t_preferred < time_second)
 355
 356 #define IFA6_IS_INVALID(a)                                              \
 357         ((a)->ia6_lifetime.ia6t_expire != 0 &&                          \
 358          (a)->ia6_lifetime.ia6t_expire < time_second)
 359 #endif
 360
 361 /*
 362  * IP6 route structure
 363  */
 364 #ifndef _XOPEN_SOURCE
 365 struct route_in6 {
 366         struct rtentry          *ro_rt;
 367         struct sockaddr_in6     ro_dst;
 368 };
 369 #endif
 370
 371 /*
 372  * Options for use with [gs]etsockopt at the IPV6 level.
 373  * First word of comment is data type; bool is stored in int.
 374  */
 375 /* no hdrincl */
 376 #if 0 /* the followings are relic in IPv4 and hence are disabled */
 377 #define IPV6_OPTIONS            1  /* buf/ip6_opts; set/get IP6 options */
 378 #define IPV6_RECVOPTS           5  /* bool; receive all IP6 opts w/dgram */
 379 #define IPV6_RECVRETOPTS        6  /* bool; receive IP6 opts for response */
 380 #define IPV6_RECVDSTADDR        7  /* bool; receive IP6 dst addr w/dgram */
 381 #define IPV6_RETOPTS            8  /* ip6_opts; set/get IP6 options */
 382 #endif
 383 #define IPV6_SOCKOPT_RESERVED1  3  /* reserved for future use */
 384 #define IPV6_UNICAST_HOPS       4  /* int; IP6 hops */
 385 #define IPV6_MULTICAST_IF       9  /* u_int; set/get IP6 multicast i/f  */
 386 #define IPV6_MULTICAST_HOPS     10 /* int; set/get IP6 multicast hops */
 387 #define IPV6_MULTICAST_LOOP     11 /* u_int; set/get IP6 multicast loopback */
 388 #define IPV6_JOIN_GROUP         12 /* ip6_mreq; join a group membership */
 389 #define IPV6_LEAVE_GROUP        13 /* ip6_mreq; leave a group membership */
 390 #define IPV6_PORTRANGE          14 /* int; range to choose for unspec port */
 391 #define ICMP6_FILTER            18 /* icmp6_filter; icmp6 filter */
 392 /* RFC2292 options */
 393 #define IPV6_PKTINFO            19 /* bool; send/recv if, src/dst addr */
 394 #define IPV6_HOPLIMIT           20 /* bool; hop limit */
 395 #define IPV6_NEXTHOP            21 /* bool; next hop addr */
 396 #define IPV6_HOPOPTS            22 /* bool; hop-by-hop option */
 397 #define IPV6_DSTOPTS            23 /* bool; destination option */
 398 #define IPV6_RTHDR              24 /* bool; routing header */
 399 #define IPV6_PKTOPTIONS         25 /* buf/cmsghdr; set/get IPv6 options */
 400
 401 #define IPV6_CHECKSUM           26 /* int; checksum offset for raw socket */
 402 #define IPV6_V6ONLY             27 /* bool; only bind INET6 at wildcard bind */
 403 #ifndef _KERNEL
 404 #define IPV6_BINDV6ONLY         IPV6_V6ONLY
 405 #endif
 406
 407 #if 1 /* IPSEC */
 408 #define IPV6_IPSEC_POLICY       28 /* struct; get/set security policy */
 409 #endif
 410 #define IPV6_FAITH              29 /* bool; accept FAITH'ed connections */
 411
 412 #if 1 /* IPV6FIREWALL */
 413 #define IPV6_FW_ADD             30 /* add a firewall rule to chain */
 414 #define IPV6_FW_DEL             31 /* delete a firewall rule from chain */
 415 #define IPV6_FW_FLUSH           32 /* flush firewall rule chain */
 416 #define IPV6_FW_ZERO            33 /* clear single/all firewall counter(s) */
 417 #define IPV6_FW_GET             34 /* get entire firewall rule chain */
 418 #endif
 419
 420 /* to define items, should talk with KAME guys first, for *BSD compatibility */
 421
 422 #define IPV6_RTHDR_LOOSE     0 /* this hop need not be a neighbor. XXX old spec */
 423 #define IPV6_RTHDR_STRICT    1 /* this hop must be a neighbor. XXX old spec */
 424 #define IPV6_RTHDR_TYPE_0    0 /* IPv6 routing header type 0 */
 425
 426 /*
 427  * Defaults and limits for options
 428  */
 429 #define IPV6_DEFAULT_MULTICAST_HOPS 1   /* normally limit m'casts to 1 hop */
 430 #define IPV6_DEFAULT_MULTICAST_LOOP 1   /* normally hear sends if a member */
 431
 432 /*
 433  * Argument structure for IPV6_JOIN_GROUP and IPV6_LEAVE_GROUP.
 434  */
 435 struct ipv6_mreq {
 436         struct in6_addr ipv6mr_multiaddr;
 437         unsigned int    ipv6mr_interface;
 438 };
 439
 440 /*
 441  * IPV6_PKTINFO: Packet information(RFC2292 sec 5)
 442  */
 443 struct in6_pktinfo {
 444         struct in6_addr ipi6_addr;      /* src/dst IPv6 address */
 445         unsigned int    ipi6_ifindex;   /* send/recv interface index */
 446 };
 447
 448 /*
 449  * Argument for IPV6_PORTRANGE:
 450  * - which range to search when port is unspecified at bind() or connect()
 451  */
 452 #define IPV6_PORTRANGE_DEFAULT  0       /* default range */
 453 #define IPV6_PORTRANGE_HIGH     1       /* "high" - request firewall bypass */
 454 #define IPV6_PORTRANGE_LOW      2       /* "low" - vouchsafe security */
 455
 456 #ifndef _XOPEN_SOURCE
 457 /*
 458  * Definitions for inet6 sysctl operations.
 459  *
 460  * Third level is protocol number.
 461  * Fourth level is desired variable within that protocol.
 462  */
 463 #define IPV6PROTO_MAXID (IPPROTO_PIM + 1)       /* don't list to IPV6PROTO_MAX */
 464
 465 #define CTL_IPV6PROTO_NAMES {                                   \
 466         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 467         { 0, 0 },                                               \
 468         { "tcp6", CTLTYPE_NODE },                               \
 469         { 0, 0 },                                               \
 470         { 0, 0 },                                               \
 471         { 0, 0 },                                               \
 472         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 473         { 0, 0 },                                               \
 474         { 0, 0 },                                               \
 475         { "udp6", CTLTYPE_NODE },                               \
 476         { 0, 0 },                                               \
 477         { 0, 0 },                                               \
 478         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 479         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 480         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 481         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 482         { 0, 0 },                                               \
 483         { "ip6", CTLTYPE_NODE },                                \
 484         { 0, 0 },                                               \
 485         { 0, 0 },                                               \
 486         { 0, 0 },                                               \
 487         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 488         { 0, 0 },                                               \
 489         { "ipsec6", CTLTYPE_NODE },                             \
 490         { 0, 0 },                                               \
 491         { 0, 0 },                                               \
 492         { 0, 0 },                                               \
 493         { 0, 0 },                                               \
 494         { 0, 0 },                                               \
 495         { 0, 0 },                                               \
 496         { "icmp6", CTLTYPE_NODE },                              \
 497         { 0, 0 },                                               \
 498         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 499         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 500         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 501         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 502         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 503         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 504         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 505         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
 506         { 0, 0 },                                               \
 507         { 0, 0 },                                               \
 508         { 0, 0 },                                               \
 509         { "pim6", CTLTYPE_NODE },                               \
 510 }
 511
 512 /*
 513  * Names for IP sysctl objects
 514  */
 515 #define IPV6CTL_FORWARDING      1       /* act as router */
 516 #define IPV6CTL_SENDREDIRECTS   2       /* may send redirects when forwarding*/
 517 #define IPV6CTL_DEFHLIM         3       /* default Hop-Limit */
 518 #ifdef notyet
 519 #define IPV6CTL_DEFMTU          4       /* default MTU */
 520 #endif
 521 #define IPV6CTL_FORWSRCRT       5       /* forward source-routed dgrams */
 522 #define IPV6CTL_STATS           6       /* stats */
 523 #define IPV6CTL_MRTSTATS        7       /* multicast forwarding stats */
 524 #define IPV6CTL_MRTPROTO        8       /* multicast routing protocol */
 525 #define IPV6CTL_MAXFRAGPACKETS  9       /* max packets reassembly queue */
 526 #define IPV6CTL_SOURCECHECK     10      /* verify source route and intf */
 527 #define IPV6CTL_SOURCECHECK_LOGINT 11   /* minimume logging interval */
 528 #define IPV6CTL_ACCEPT_RTADV    12
 529 #define IPV6CTL_KEEPFAITH       13
 530 #define IPV6CTL_LOG_INTERVAL    14
 531 #define IPV6CTL_HDRNESTLIMIT    15
 532 #define IPV6CTL_DAD_COUNT       16
 533 #define IPV6CTL_AUTO_FLOWLABEL  17
 534 #define IPV6CTL_DEFMCASTHLIM    18
 535 #define IPV6CTL_GIF_HLIM        19      /* default HLIM for gif encap packet */
 536 #define IPV6CTL_KAME_VERSION    20
 537 #define IPV6CTL_USE_DEPRECATED  21      /* use deprecated addr (RFC2462 5.5.4) */
 538 #define IPV6CTL_RR_PRUNE        22      /* walk timer for router renumbering */
 539 #if 0   /* obsolete */
 540 #define IPV6CTL_MAPPED_ADDR     23
 541 #endif
 542 #define IPV6CTL_V6ONLY          24
 543 #define IPV6CTL_RTEXPIRE        25      /* cloned route expiration time */
 544 #define IPV6CTL_RTMINEXPIRE     26      /* min value for expiration time */
 545 #define IPV6CTL_RTMAXCACHE      27      /* trigger level for dynamic expire */
 546
 547 #define IPV6CTL_USETEMPADDR     32      /* use temporary addresses (RFC3041) */
 548 #define IPV6CTL_TEMPPLTIME      33      /* preferred lifetime for tmpaddrs */
 549 #define IPV6CTL_TEMPVLTIME      34      /* valid lifetime for tmpaddrs */
 550 #define IPV6CTL_AUTO_LINKLOCAL  35      /* automatic link-local addr assign */
 551 #define IPV6CTL_RIP6STATS       36      /* raw_ip6 stats */
 552
 553 /* New entries should be added here from current IPV6CTL_MAXID value. */
 554 /* to define items, should talk with KAME guys first, for *BSD compatibility */
 555 #define IPV6CTL_MAXID           37
 556
 557 #endif /* !_XOPEN_SOURCE */
 558
 559 /*
 560  * Redefinition of mbuf flags
 561  */
 562 #define M_AUTHIPHDR     M_PROTO2
 563 #define M_DECRYPTED     M_PROTO3
 564 #define M_LOOP          M_PROTO4
 565 #define M_AUTHIPDGM     M_PROTO5
 566
 567 #ifdef _KERNEL
 568
 569 struct ifnet;
 570 struct mbuf;
 571 struct sockaddr;
 572 struct sockaddr_in;
 573 struct sockaddr_in6;
 574
 575 int     in6_cksum (struct mbuf *, uint8_t, uint32_t, uint32_t);
 576 int     in6_localaddr (struct in6_addr *);
 577 int     in6_addrscope (struct in6_addr *);
 578 struct  in6_ifaddr *in6_ifawithscope (struct ifnet *, struct in6_addr *);
 579 struct  in6_ifaddr *in6_ifawithifp (struct ifnet *, struct in6_addr *);
 580 void    in6_if_up (struct ifnet *);
 581
 582 void    in6_sin6_2_sin (struct sockaddr_in *sin, struct sockaddr_in6 *sin6);
 583 void    in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6);
 584 void    in6_sin6_2_sin_in_sock (struct sockaddr *nam);
 585 void    in6_sin_2_v4mapsin6_in_sock (struct sockaddr **nam);
 586
 587 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
 588 #define sin6tosa(sin6)  ((struct sockaddr *)(sin6))
 589 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
 590
 591 extern int (*faithprefix_p)(struct in6_addr *);
 592 #endif /* _KERNEL */
 593
 594 #include <sys/cdefs.h>          /* for __BEGIN_DECLS and __END_DECLS */
 595
 596 __BEGIN_DECLS
 597 struct cmsghdr;
 598
 599 uint8_t *inet6_option_alloc (struct cmsghdr *, int, int, int);
 600 int inet6_option_append (struct cmsghdr *, const uint8_t *, int, int);
 601 int inet6_option_find (const struct cmsghdr *, uint8_t **, int);
 602 int inet6_option_init (void *, struct cmsghdr **, int);
 603 int inet6_option_next (const struct cmsghdr *, uint8_t **);
 604 int inet6_option_space (int);
 605
 606 int inet6_opt_append (void *, size_t, int, uint8_t, size_t, uint8_t, void **);
 607 int inet6_opt_find (void *, size_t, int, uint8_t, size_t *, void **);
 608 int inet6_opt_finish (void *, size_t, int);
 609 int inet6_opt_get_val (void *, size_t, void *, int);
 610 int inet6_opt_init (void *, size_t);
 611 int inet6_opt_next (void *, size_t, int, uint8_t *, size_t *, void **);
 612 int inet6_opt_set_val (void *, size_t, void *, int);
 613
 614 int              inet6_rth_add (void *, const struct in6_addr *);
 615 struct in6_addr *inet6_rth_getaddr (const void *, int);
 616 void            *inet6_rth_init (void *, int, int, int);
 617 int              inet6_rth_reverse (const void *, void *);
 618 int              inet6_rth_segments (const void *);
 619 size_t           inet6_rth_space (int, int);
 620
 621 int              inet6_rthdr_add (struct cmsghdr *, const struct in6_addr *,
 622                                   unsigned int);
 623 struct in6_addr *inet6_rthdr_getaddr (struct cmsghdr *, int);
 624 int              inet6_rthdr_getflags (const struct cmsghdr *, int);
 625 struct cmsghdr  *inet6_rthdr_init (void *, int);
 626 int              inet6_rthdr_lasthop (struct cmsghdr *, unsigned int);
 627 #if 0                                   /* not implemented yet */
 628 int              inet6_rthdr_reverse (const struct cmsghdr *, struct cmsghdr *);
 629 #endif
 630 int              inet6_rthdr_segments (const struct cmsghdr *);
 631 size_t           inet6_rthdr_space (int, int);
 632 __END_DECLS
 633
 634 #endif /* !_NETINET6_IN6_H_ */