sys/netinet6/in6.h

   1 /*      $NetBSD: in6.h,v 1.67 2009/08/19 18:52:48 seanb Exp $   */
   2 /*      $KAME: in6.h,v 1.83 2001/03/29 02:55:07 jinmei Exp $    */
   3
   4 /*
   5  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the project nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 /*
  34  * Copyright (c) 1982, 1986, 1990, 1993
  35  *      The Regents of the University of California.  All rights reserved.
  36  *
  37  * Redistribution and use in source and binary forms, with or without
  38  * modification, are permitted provided that the following conditions
  39  * are met:
  40  * 1. Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  * 2. Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in the
  44  *    documentation and/or other materials provided with the distribution.
  45  * 3. Neither the name of the University nor the names of its contributors
  46  *    may be used to endorse or promote products derived from this software
  47  *    without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  50  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  51  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  52  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  53  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  54  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  55  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  56  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  57  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  58  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  59  * SUCH DAMAGE.
  60  *
  61  *      @(#)in.h        8.3 (Berkeley) 1/3/94
  62  */
  63
  64 #ifndef _NETINET6_IN6_H_
  65 #define _NETINET6_IN6_H_
  66
  67 #ifndef __KAME_NETINET_IN_H_INCLUDED_
  68 #error "do not include netinet6/in6.h directly, include netinet/in.h.  see RFC2553"
  69 #endif
  70
  71 #include <sys/socket.h>
  72
  73 /*
  74  * Identification of the network protocol stack
  75  * for *BSD-current/release: http://www.kame.net/dev/cvsweb.cgi/kame/COVERAGE
  76  * has the table of implementation/integration differences.
  77  */
  78 #define __KAME__
  79 #define __KAME_VERSION          "NetBSD-current"
  80
  81 /*
  82  * Local port number conventions:
  83  *
  84  * Ports < IPPORT_RESERVED are reserved for privileged processes (e.g. root),
  85  * unless a kernel is compiled with IPNOPRIVPORTS defined.
  86  *
  87  * When a user does a bind(2) or connect(2) with a port number of zero,
  88  * a non-conflicting local port address is chosen.
  89  *
  90  * The default range is IPPORT_ANONMIN to IPPORT_ANONMAX, although
  91  * that is settable by sysctl(3); net.inet.ip.anonportmin and
  92  * net.inet.ip.anonportmax respectively.
  93  *
  94  * A user may set the IPPROTO_IP option IP_PORTRANGE to change this
  95  * default assignment range.
  96  *
  97  * The value IP_PORTRANGE_DEFAULT causes the default behavior.
  98  *
  99  * The value IP_PORTRANGE_HIGH is the same as IP_PORTRANGE_DEFAULT,
 100  * and exists only for FreeBSD compatibility purposes.
 101  *
 102  * The value IP_PORTRANGE_LOW changes the range to the "low" are
 103  * that is (by convention) restricted to privileged processes.
 104  * This convention is based on "vouchsafe" principles only.
 105  * It is only secure if you trust the remote host to restrict these ports.
 106  * The range is IPPORT_RESERVEDMIN to IPPORT_RESERVEDMAX.
 107  */
 108
 109 #if defined(_NETBSD_SOURCE)
 110 #define IPV6PORT_RESERVED       1024
 111 #define IPV6PORT_ANONMIN        49152
 112 #define IPV6PORT_ANONMAX        65535
 113 #define IPV6PORT_RESERVEDMIN    600
 114 #define IPV6PORT_RESERVEDMAX    (IPV6PORT_RESERVED-1)
 115 #endif
 116
 117 /*
 118  * IPv6 address
 119  */
 120 struct in6_addr {
 121         union {
 122                 __uint8_t   __u6_addr8[16];
 123                 __uint16_t  __u6_addr16[8];
 124                 uint32_t  __u6_addr32[4];
 125         } __u6_addr;                    /* 128-bit IP6 address */
 126 };
 127
 128 #define s6_addr   __u6_addr.__u6_addr8
 129 #ifdef _KERNEL  /* XXX nonstandard */
 130 #define s6_addr8  __u6_addr.__u6_addr8
 131 #define s6_addr16 __u6_addr.__u6_addr16
 132 #define s6_addr32 __u6_addr.__u6_addr32
 133 #endif
 134
 135 #define INET6_ADDRSTRLEN        46
 136
 137 /*
 138  * Socket address for IPv6
 139  */
 140 #if defined(_NETBSD_SOURCE)
 141 #define SIN6_LEN
 142 #endif
 143 struct sockaddr_in6 {
 144         uint8_t         sin6_len;       /* length of this struct(socklen_t)*/
 145         sa_family_t     sin6_family;    /* AF_INET6 (sa_family_t) */
 146         in_port_t       sin6_port;      /* Transport layer port */
 147         uint32_t        sin6_flowinfo;  /* IP6 flow information */
 148         struct in6_addr sin6_addr;      /* IP6 address */
 149         uint32_t        sin6_scope_id;  /* scope zone index */
 150 };
 151
 152 /*
 153  * Local definition for masks
 154  */
 155 #ifdef _KERNEL  /* XXX nonstandard */
 156 #define IN6MASK0        {{{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }}}
 157 #define IN6MASK32       {{{ 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, \
 158                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
 159 #define IN6MASK64       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
 160                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
 161 #define IN6MASK96       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
 162                             0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00 }}}
 163 #define IN6MASK128      {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
 164                             0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}}
 165 #endif
 166
 167 #ifdef _KERNEL
 168 extern const struct sockaddr_in6 sa6_any;
 169
 170 extern const struct in6_addr in6mask0;
 171 extern const struct in6_addr in6mask32;
 172 extern const struct in6_addr in6mask64;
 173 extern const struct in6_addr in6mask96;
 174 extern const struct in6_addr in6mask128;
 175 #endif /* _KERNEL */
 176
 177 /*
 178  * Macros started with IPV6_ADDR is KAME local
 179  */
 180 #ifdef _KERNEL  /* XXX nonstandard */
 181 #if BYTE_ORDER == BIG_ENDIAN
 182 #define IPV6_ADDR_INT32_ONE     1
 183 #define IPV6_ADDR_INT32_TWO     2
 184 #define IPV6_ADDR_INT32_MNL     0xff010000
 185 #define IPV6_ADDR_INT32_MLL     0xff020000
 186 #define IPV6_ADDR_INT32_SMP     0x0000ffff
 187 #define IPV6_ADDR_INT16_ULL     0xfe80
 188 #define IPV6_ADDR_INT16_USL     0xfec0
 189 #define IPV6_ADDR_INT16_MLL     0xff02
 190 #elif BYTE_ORDER == LITTLE_ENDIAN
 191 #define IPV6_ADDR_INT32_ONE     0x01000000
 192 #define IPV6_ADDR_INT32_TWO     0x02000000
 193 #define IPV6_ADDR_INT32_MNL     0x000001ff
 194 #define IPV6_ADDR_INT32_MLL     0x000002ff
 195 #define IPV6_ADDR_INT32_SMP     0xffff0000
 196 #define IPV6_ADDR_INT16_ULL     0x80fe
 197 #define IPV6_ADDR_INT16_USL     0xc0fe
 198 #define IPV6_ADDR_INT16_MLL     0x02ff
 199 #endif
 200 #endif
 201
 202 /*
 203  * Definition of some useful macros to handle IP6 addresses
 204  */
 205 #define IN6ADDR_ANY_INIT \
 206         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 207             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
 208 #define IN6ADDR_LOOPBACK_INIT \
 209         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 210             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 211 #define IN6ADDR_NODELOCAL_ALLNODES_INIT \
 212         {{{ 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 213             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 214 #define IN6ADDR_LINKLOCAL_ALLNODES_INIT \
 215         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 216             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 217 #define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \
 218         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 219             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}}
 220
 221 extern const struct in6_addr in6addr_any;
 222 extern const struct in6_addr in6addr_loopback;
 223 extern const struct in6_addr in6addr_nodelocal_allnodes;
 224 extern const struct in6_addr in6addr_linklocal_allnodes;
 225 extern const struct in6_addr in6addr_linklocal_allrouters;
 226
 227 #define IN6_ARE_ADDR_EQUAL(a, b)                        \
 228     (memcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
 229
 230 /*
 231  * Unspecified
 232  */
 233 #define IN6_IS_ADDR_UNSPECIFIED(a)      \
 234         ((a)->__u6_addr.__u6_addr32[0] == 0 &&  \
 235          (a)->__u6_addr.__u6_addr32[1] == 0 &&  \
 236          (a)->__u6_addr.__u6_addr32[2] == 0 &&  \
 237          (a)->__u6_addr.__u6_addr32[3] == 0)
 238
 239 /*
 240  * Loopback
 241  */
 242 #define IN6_IS_ADDR_LOOPBACK(a)         \
 243         ((a)->__u6_addr.__u6_addr32[0] == 0 &&  \
 244          (a)->__u6_addr.__u6_addr32[1] == 0 &&  \
 245          (a)->__u6_addr.__u6_addr32[2] == 0 &&  \
 246          (a)->__u6_addr.__u6_addr32[3] == ntohl(1))
 247
 248 /*
 249  * IPv4 compatible
 250  */
 251 #define IN6_IS_ADDR_V4COMPAT(a)         \
 252         ((a)->__u6_addr.__u6_addr32[0] == 0 &&  \
 253          (a)->__u6_addr.__u6_addr32[1] == 0 &&  \
 254          (a)->__u6_addr.__u6_addr32[2] == 0 &&  \
 255          (a)->__u6_addr.__u6_addr32[3] != 0 &&  \
 256          (a)->__u6_addr.__u6_addr32[3] != ntohl(1))
 257
 258 /*
 259  * Mapped
 260  */
 261 #define IN6_IS_ADDR_V4MAPPED(a)               \
 262         ((a)->__u6_addr.__u6_addr32[0] == 0 &&  \
 263          (a)->__u6_addr.__u6_addr32[1] == 0 &&  \
 264          (a)->__u6_addr.__u6_addr32[2] == ntohl(0x0000ffff))
 265
 266 /*
 267  * KAME Scope Values
 268  */
 269
 270 #ifdef _KERNEL  /* XXX nonstandard */
 271 #define IPV6_ADDR_SCOPE_NODELOCAL       0x01
 272 #define IPV6_ADDR_SCOPE_INTFACELOCAL    0x01
 273 #define IPV6_ADDR_SCOPE_LINKLOCAL       0x02
 274 #define IPV6_ADDR_SCOPE_SITELOCAL       0x05
 275 #define IPV6_ADDR_SCOPE_ORGLOCAL        0x08    /* just used in this file */
 276 #define IPV6_ADDR_SCOPE_GLOBAL          0x0e
 277 #else
 278 #define __IPV6_ADDR_SCOPE_NODELOCAL     0x01
 279 #define __IPV6_ADDR_SCOPE_LINKLOCAL     0x02
 280 #define __IPV6_ADDR_SCOPE_SITELOCAL     0x05
 281 #define __IPV6_ADDR_SCOPE_ORGLOCAL      0x08    /* just used in this file */
 282 #define __IPV6_ADDR_SCOPE_GLOBAL        0x0e
 283 #endif
 284
 285 /*
 286  * Unicast Scope
 287  * Note that we must check topmost 10 bits only, not 16 bits (see RFC2373).
 288  */
 289 #define IN6_IS_ADDR_LINKLOCAL(a)        \
 290         (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0x80))
 291 #define IN6_IS_ADDR_SITELOCAL(a)        \
 292         (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0xc0))
 293
 294 /*
 295  * Multicast
 296  */
 297 #define IN6_IS_ADDR_MULTICAST(a)        ((a)->s6_addr[0] == 0xff)
 298
 299 #ifdef _KERNEL  /* XXX nonstandard */
 300 #define IPV6_ADDR_MC_SCOPE(a)           ((a)->s6_addr[1] & 0x0f)
 301 #else
 302 #define __IPV6_ADDR_MC_SCOPE(a)         ((a)->s6_addr[1] & 0x0f)
 303 #endif
 304
 305 /*
 306  * Multicast Scope
 307  */
 308 #ifdef _KERNEL  /* refers nonstandard items */
 309 #define IN6_IS_ADDR_MC_NODELOCAL(a)     \
 310         (IN6_IS_ADDR_MULTICAST(a) &&    \
 311          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_NODELOCAL))
 312 #define IN6_IS_ADDR_MC_INTFACELOCAL(a)  \
 313         (IN6_IS_ADDR_MULTICAST(a) &&    \
 314          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_INTFACELOCAL))
 315 #define IN6_IS_ADDR_MC_LINKLOCAL(a)     \
 316         (IN6_IS_ADDR_MULTICAST(a) &&    \
 317          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_LINKLOCAL))
 318 #define IN6_IS_ADDR_MC_SITELOCAL(a)     \
 319         (IN6_IS_ADDR_MULTICAST(a) &&    \
 320          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_SITELOCAL))
 321 #define IN6_IS_ADDR_MC_ORGLOCAL(a)      \
 322         (IN6_IS_ADDR_MULTICAST(a) &&    \
 323          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_ORGLOCAL))
 324 #define IN6_IS_ADDR_MC_GLOBAL(a)        \
 325         (IN6_IS_ADDR_MULTICAST(a) &&    \
 326          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_GLOBAL))
 327 #else
 328 #define IN6_IS_ADDR_MC_NODELOCAL(a)     \
 329         (IN6_IS_ADDR_MULTICAST(a) &&    \
 330          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_NODELOCAL))
 331 #define IN6_IS_ADDR_MC_LINKLOCAL(a)     \
 332         (IN6_IS_ADDR_MULTICAST(a) &&    \
 333          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_LINKLOCAL))
 334 #define IN6_IS_ADDR_MC_SITELOCAL(a)     \
 335         (IN6_IS_ADDR_MULTICAST(a) &&    \
 336          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_SITELOCAL))
 337 #define IN6_IS_ADDR_MC_ORGLOCAL(a)      \
 338         (IN6_IS_ADDR_MULTICAST(a) &&    \
 339          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_ORGLOCAL))
 340 #define IN6_IS_ADDR_MC_GLOBAL(a)        \
 341         (IN6_IS_ADDR_MULTICAST(a) &&    \
 342          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_GLOBAL))
 343 #endif
 344
 345 #ifdef _KERNEL  /* nonstandard */
 346 /*
 347  * KAME Scope
 348  */
 349 #define IN6_IS_SCOPE_LINKLOCAL(a)       \
 350         ((IN6_IS_ADDR_LINKLOCAL(a)) ||  \
 351          (IN6_IS_ADDR_MC_LINKLOCAL(a)))
 352
 353 #define IN6_IS_SCOPE_EMBEDDABLE(__a)    \
 354     (IN6_IS_SCOPE_LINKLOCAL(__a) || IN6_IS_ADDR_MC_INTFACELOCAL(__a))
 355
 356 #define IFA6_IS_DEPRECATED(a) \
 357         ((a)->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME && \
 358          (u_int32_t)((time_second - (a)->ia6_updatetime)) > \
 359          (a)->ia6_lifetime.ia6t_pltime)
 360 #define IFA6_IS_INVALID(a) \
 361         ((a)->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME && \
 362          (u_int32_t)((time_second - (a)->ia6_updatetime)) > \
 363          (a)->ia6_lifetime.ia6t_vltime)
 364 #endif
 365
 366 /*
 367  * Options for use with [gs]etsockopt at the IPV6 level.
 368  * First word of comment is data type; bool is stored in int.
 369  */
 370 /* no hdrincl */
 371 #if 0
 372 /* These are deprecated non-standard options which are no longer supported. */
 373 #define IPV6_OPTIONS            1  /* buf/ip6_opts; set/get IP6 options */
 374 #define IPV6_RECVOPTS           5  /* bool; receive all IP6 opts w/dgram */
 375 #define IPV6_RECVRETOPTS        6  /* bool; receive IP6 opts for response */
 376 #define IPV6_RECVDSTADDR        7  /* bool; receive IP6 dst addr w/dgram */
 377 #define IPV6_RETOPTS            8  /* ip6_opts; set/get IP6 options */
 378 #endif
 379 #define IPV6_SOCKOPT_RESERVED1  3  /* reserved for future use */
 380 #define IPV6_UNICAST_HOPS       4  /* int; IP6 hops */
 381 #define IPV6_MULTICAST_IF       9  /* u_int; set/get IP6 multicast i/f  */
 382 #define IPV6_MULTICAST_HOPS     10 /* int; set/get IP6 multicast hops */
 383 #define IPV6_MULTICAST_LOOP     11 /* u_int; set/get IP6 multicast loopback */
 384 #define IPV6_JOIN_GROUP         12 /* ip6_mreq; join a group membership */
 385 #define IPV6_LEAVE_GROUP        13 /* ip6_mreq; leave a group membership */
 386 #define IPV6_PORTRANGE          14 /* int; range to choose for unspec port */
 387 #if defined(_NETBSD_SOURCE)
 388 #define ICMP6_FILTER            18 /* icmp6_filter; icmp6 filter */
 389 #endif
 390 /* RFC2292 options */
 391 #ifdef _KERNEL
 392 #define IPV6_2292PKTINFO        19 /* bool; send/recv if, src/dst addr */
 393 #define IPV6_2292HOPLIMIT       20 /* bool; hop limit */
 394 #define IPV6_2292NEXTHOP        21 /* bool; next hop addr */
 395 #define IPV6_2292HOPOPTS        22 /* bool; hop-by-hop option */
 396 #define IPV6_2292DSTOPTS        23 /* bool; destination option */
 397 #define IPV6_2292RTHDR          24 /* bool; routing header */
 398 #define IPV6_2292PKTOPTIONS     25 /* buf/cmsghdr; set/get IPv6 options */
 399 #endif
 400 #define IPV6_CHECKSUM           26 /* int; checksum offset for raw socket */
 401 #define IPV6_V6ONLY             27 /* bool; make AF_INET6 sockets v6 only */
 402
 403 #if 1 /* IPSEC */
 404 #define IPV6_IPSEC_POLICY       28 /* struct; get/set security policy */
 405 #endif
 406 #define IPV6_FAITH              29 /* bool; accept FAITH'ed connections */
 407
 408 /* new socket options introduced in RFC3542 */
 409 #define IPV6_RTHDRDSTOPTS       35 /* ip6_dest; send dst option before rthdr */
 410
 411 #define IPV6_RECVPKTINFO        36 /* bool; recv if, dst addr */
 412 #define IPV6_RECVHOPLIMIT       37 /* bool; recv hop limit */
 413 #define IPV6_RECVRTHDR          38 /* bool; recv routing header */
 414 #define IPV6_RECVHOPOPTS        39 /* bool; recv hop-by-hop option */
 415 #define IPV6_RECVDSTOPTS        40 /* bool; recv dst option after rthdr */
 416 #ifdef _KERNEL
 417 #define IPV6_RECVRTHDRDSTOPTS   41 /* bool; recv dst option before rthdr */
 418 #endif
 419 #define IPV6_USE_MIN_MTU        42 /* bool; send packets at the minimum MTU */
 420 #define IPV6_RECVPATHMTU        43 /* bool; notify an according MTU */
 421 #define IPV6_PATHMTU            44 /* mtuinfo; get the current path MTU (sopt),
 422                                       4 bytes int; MTU notification (cmsg) */
 423
 424 /* more new socket options introduced in RFC3542 */
 425 #define IPV6_PKTINFO            46 /* in6_pktinfo; send if, src addr */
 426 #define IPV6_HOPLIMIT           47 /* int; send hop limit */
 427 #define IPV6_NEXTHOP            48 /* sockaddr; next hop addr */
 428 #define IPV6_HOPOPTS            49 /* ip6_hbh; send hop-by-hop option */
 429 #define IPV6_DSTOPTS            50 /* ip6_dest; send dst option befor rthdr */
 430 #define IPV6_RTHDR              51 /* ip6_rthdr; send routing header */
 431
 432 #define IPV6_RECVTCLASS         57 /* bool; recv traffic class values */
 433 #ifdef _KERNEL
 434 #define IPV6_OTCLASS            58 /* u_int8_t; send traffic class value */
 435 #endif
 436
 437 #define IPV6_TCLASS             61 /* int; send traffic class value */
 438 #define IPV6_DONTFRAG           62 /* bool; disable IPv6 fragmentation */
 439 /* to define items, should talk with KAME guys first, for *BSD compatibility */
 440
 441 #define IPV6_RTHDR_LOOSE     0 /* this hop need not be a neighbor. XXX old spec */
 442 #define IPV6_RTHDR_STRICT    1 /* this hop must be a neighbor. XXX old spec */
 443 #define IPV6_RTHDR_TYPE_0    0 /* IPv6 routing header type 0 */
 444
 445 /*
 446  * Defaults and limits for options
 447  */
 448 #define IPV6_DEFAULT_MULTICAST_HOPS 1   /* normally limit m'casts to 1 hop  */
 449 #define IPV6_DEFAULT_MULTICAST_LOOP 1   /* normally hear sends if a member  */
 450
 451 /*
 452  * Argument structure for IPV6_JOIN_GROUP and IPV6_LEAVE_GROUP.
 453  */
 454 struct ipv6_mreq {
 455         struct in6_addr ipv6mr_multiaddr;
 456         unsigned int    ipv6mr_interface;
 457 };
 458
 459 /*
 460  * IPV6_PKTINFO: Packet information(RFC2292 sec 5)
 461  */
 462 struct in6_pktinfo {
 463         struct in6_addr ipi6_addr;      /* src/dst IPv6 address */
 464         unsigned int    ipi6_ifindex;   /* send/recv interface index */
 465 };
 466
 467 /*
 468  * Control structure for IPV6_RECVPATHMTU socket option.
 469  */
 470 struct ip6_mtuinfo {
 471         struct sockaddr_in6 ip6m_addr;  /* or sockaddr_storage? */
 472         uint32_t ip6m_mtu;
 473 };
 474
 475 /*
 476  * Argument for IPV6_PORTRANGE:
 477  * - which range to search when port is unspecified at bind() or connect()
 478  */
 479 #define IPV6_PORTRANGE_DEFAULT  0       /* default range */
 480 #define IPV6_PORTRANGE_HIGH     1       /* "high" - request firewall bypass */
 481 #define IPV6_PORTRANGE_LOW      2       /* "low" - vouchsafe security */
 482
 483 #if defined(_NETBSD_SOURCE)
 484 /*
 485  * Definitions for inet6 sysctl operations.
 486  *
 487  * Third level is protocol number.
 488  * Fourth level is desired variable within that protocol.
 489  */
 490 #define IPV6PROTO_MAXID (IPPROTO_PIM + 1)       /* don't list to IPV6PROTO_MAX */
 491
 492 #define CTL_IPV6PROTO_NAMES { \
 493         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 494         { 0, 0 }, \
 495         { "tcp6", CTLTYPE_NODE }, \
 496         { 0, 0 }, \
 497         { 0, 0 }, \
 498         { 0, 0 }, \
 499         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 500         { 0, 0 }, \
 501         { 0, 0 }, \
 502         { "udp6", CTLTYPE_NODE }, \
 503         { 0, 0 }, \
 504         { 0, 0 }, \
 505         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 506         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 507         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 508         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 509         { 0, 0 }, \
 510         { "ip6", CTLTYPE_NODE }, \
 511         { 0, 0 }, \
 512         { 0, 0 }, \
 513         { 0, 0 }, \
 514         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 515         { 0, 0 }, \
 516         { "ipsec6", CTLTYPE_NODE }, \
 517         { 0, 0 }, \
 518         { 0, 0 }, \
 519         { 0, 0 }, \
 520         { 0, 0 }, \
 521         { 0, 0 }, \
 522         { 0, 0 }, \
 523         { "icmp6", CTLTYPE_NODE }, \
 524         { 0, 0 }, \
 525         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 526         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 527         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 528         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 529         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 530         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 531         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 532         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 533         { 0, 0 }, \
 534         { 0, 0 }, \
 535         { 0, 0 }, \
 536         { "pim6", CTLTYPE_NODE }, \
 537 }
 538
 539 /*
 540  * Names for IP sysctl objects
 541  */
 542 #define IPV6CTL_FORWARDING      1       /* act as router */
 543 #define IPV6CTL_SENDREDIRECTS   2       /* may send redirects when forwarding*/
 544 #define IPV6CTL_DEFHLIM         3       /* default Hop-Limit */
 545 #ifdef notyet
 546 #define IPV6CTL_DEFMTU          4       /* default MTU */
 547 #endif
 548 #define IPV6CTL_FORWSRCRT       5       /* forward source-routed dgrams */
 549 #define IPV6CTL_STATS           6       /* stats */
 550 #define IPV6CTL_MRTSTATS        7       /* multicast forwarding stats */
 551 #define IPV6CTL_MRTPROTO        8       /* multicast routing protocol */
 552 #define IPV6CTL_MAXFRAGPACKETS  9       /* max packets reassembly queue */
 553 #define IPV6CTL_SOURCECHECK     10      /* verify source route and intf */
 554 #define IPV6CTL_SOURCECHECK_LOGINT 11   /* minimume logging interval */
 555 #define IPV6CTL_ACCEPT_RTADV    12
 556 #define IPV6CTL_KEEPFAITH       13
 557 #define IPV6CTL_LOG_INTERVAL    14
 558 #define IPV6CTL_HDRNESTLIMIT    15
 559 #define IPV6CTL_DAD_COUNT       16
 560 #define IPV6CTL_AUTO_FLOWLABEL  17
 561 #define IPV6CTL_DEFMCASTHLIM    18
 562 #define IPV6CTL_GIF_HLIM        19      /* default HLIM for gif encap packet */
 563 #define IPV6CTL_KAME_VERSION    20
 564 #define IPV6CTL_USE_DEPRECATED  21      /* use deprecated addr (RFC2462 5.5.4) */
 565 #define IPV6CTL_RR_PRUNE        22      /* walk timer for router renumbering */
 566 /* 23: reserved */
 567 #define IPV6CTL_V6ONLY          24
 568 /* 25 to 27: reserved */
 569 #define IPV6CTL_ANONPORTMIN     28      /* minimum ephemeral port */
 570 #define IPV6CTL_ANONPORTMAX     29      /* maximum ephemeral port */
 571 #define IPV6CTL_LOWPORTMIN      30      /* minimum reserved port */
 572 #define IPV6CTL_LOWPORTMAX      31      /* maximum reserved port */
 573 /* 32 to 38: reserved */
 574 #define IPV6CTL_USE_DEFAULTZONE 39      /* use default scope zone */
 575 /* 40: reserved */
 576 #define IPV6CTL_MAXFRAGS        41      /* max fragments */
 577 #define IPV6CTL_IFQ             42      /* ip6intrq node */
 578 /* New entries should be added here from current IPV6CTL_MAXID value. */
 579 /* to define items, should talk with KAME guys first, for *BSD compatibility */
 580 #define IPV6CTL_MAXID           43
 581
 582 #define IPV6CTL_NAMES { \
 583         { 0, 0 }, \
 584         { "forwarding", CTLTYPE_INT }, \
 585         { "redirect", CTLTYPE_INT }, \
 586         { "hlim", CTLTYPE_INT }, \
 587         { "mtu", CTLTYPE_INT }, \
 588         { "forwsrcrt", CTLTYPE_INT }, \
 589         { "stats", CTLTYPE_STRUCT }, \
 590         { 0, 0 }, \
 591         { "mrtproto", CTLTYPE_INT }, \
 592         { "maxfragpackets", CTLTYPE_INT }, \
 593         { "sourcecheck", CTLTYPE_INT }, \
 594         { "sourcecheck_logint", CTLTYPE_INT }, \
 595         { "accept_rtadv", CTLTYPE_INT }, \
 596         { "keepfaith", CTLTYPE_INT }, \
 597         { "log_interval", CTLTYPE_INT }, \
 598         { "hdrnestlimit", CTLTYPE_INT }, \
 599         { "dad_count", CTLTYPE_INT }, \
 600         { "auto_flowlabel", CTLTYPE_INT }, \
 601         { "defmcasthlim", CTLTYPE_INT }, \
 602         { "gifhlim", CTLTYPE_INT }, \
 603         { "kame_version", CTLTYPE_STRING }, \
 604         { "use_deprecated", CTLTYPE_INT }, \
 605         { "rr_prune", CTLTYPE_INT }, \
 606         { 0, 0 }, \
 607         { "v6only", CTLTYPE_INT }, \
 608         { 0, 0 }, \
 609         { 0, 0 }, \
 610         { 0, 0 }, \
 611         { "anonportmin", CTLTYPE_INT }, \
 612         { "anonportmax", CTLTYPE_INT }, \
 613         { "lowportmin", CTLTYPE_INT }, \
 614         { "lowportmax", CTLTYPE_INT }, \
 615         { 0, 0 }, \
 616         { 0, 0 }, \
 617         { 0, 0 }, \
 618         { 0, 0 }, \
 619         { 0, 0 }, \
 620         { 0, 0 }, \
 621         { 0, 0 }, \
 622         { 0, 0 }, \
 623         { 0, 0 }, \
 624         { "maxfrags", CTLTYPE_INT }, \
 625         { "ifq", CTLTYPE_NODE }, \
 626 }
 627
 628 #endif /* _NETBSD_SOURCE */
 629
 630 #ifdef _KERNEL
 631 struct cmsghdr;
 632
 633 /*
 634  * in6_cksum_phdr:
 635  *
 636  *      Compute significant parts of the IPv6 checksum pseudo-header
 637  *      for use in a delayed TCP/UDP checksum calculation.
 638  *
 639  *      Args:
 640  *
 641  *              src             Source IPv6 address
 642  *              dst             Destination IPv6 address
 643  *              len             htonl(proto-hdr-len)
 644  *              nxt             htonl(next-proto-number)
 645  *
 646  *      NOTE: We expect the src and dst addresses to be 16-bit
 647  *      aligned!
 648  */
 649 static __inline u_int16_t __unused
 650 in6_cksum_phdr(const struct in6_addr *src, const struct in6_addr *dst,
 651     u_int32_t len, u_int32_t nxt)
 652 {
 653         u_int32_t sum = 0;
 654         const u_int16_t *w;
 655
 656         /*LINTED*/
 657         w = (const u_int16_t *) src;
 658         sum += w[0];
 659         if (!IN6_IS_SCOPE_LINKLOCAL(src))
 660                 sum += w[1];
 661         sum += w[2]; sum += w[3]; sum += w[4]; sum += w[5];
 662         sum += w[6]; sum += w[7];
 663
 664         /*LINTED*/
 665         w = (const u_int16_t *) dst;
 666         sum += w[0];
 667         if (!IN6_IS_SCOPE_LINKLOCAL(dst))
 668                 sum += w[1];
 669         sum += w[2]; sum += w[3]; sum += w[4]; sum += w[5];
 670         sum += w[6]; sum += w[7];
 671
 672         sum += (u_int16_t)(len >> 16) + (u_int16_t)(len /*& 0xffff*/);
 673
 674         sum += (u_int16_t)(nxt >> 16) + (u_int16_t)(nxt /*& 0xffff*/);
 675
 676         sum = (u_int16_t)(sum >> 16) + (u_int16_t)(sum /*& 0xffff*/);
 677
 678         if (sum > 0xffff)
 679                 sum -= 0xffff;
 680
 681         return (sum);
 682 }
 683
 684 struct mbuf;
 685 struct ifnet;
 686 int sockaddr_in6_cmp(const struct sockaddr *, const struct sockaddr *);
 687 struct sockaddr *sockaddr_in6_externalize(struct sockaddr *, socklen_t,
 688     const struct sockaddr *);
 689 int     in6_cksum(struct mbuf *, u_int8_t, u_int32_t, u_int32_t);
 690 void    in6_delayed_cksum(struct mbuf *);
 691 int     in6_localaddr(const struct in6_addr *);
 692 int     in6_addrscope(const struct in6_addr *);
 693 struct  in6_ifaddr *in6_ifawithifp(struct ifnet *, struct in6_addr *);
 694 extern void in6_if_up(struct ifnet *);
 695 #ifndef __FreeBSD__
 696 extern int in6_src_sysctl(void *, size_t *, void *, size_t);
 697 #endif
 698 extern void addrsel_policy_init(void);
 699 extern  u_char  ip6_protox[];
 700
 701 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
 702 #define satocsin6(sa)   ((const struct sockaddr_in6 *)(sa))
 703 #define sin6tosa(sin6)  ((struct sockaddr *)(sin6))
 704 #define sin6tocsa(sin6) ((const struct sockaddr *)(sin6))
 705 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
 706
 707 static inline void
 708 sockaddr_in6_init1(struct sockaddr_in6 *sin6, const struct in6_addr *addr,
 709     in_port_t port, uint32_t flowinfo, uint32_t scope_id)
 710 {
 711         sin6->sin6_port = port;
 712         sin6->sin6_flowinfo = flowinfo;
 713         sin6->sin6_addr = *addr;
 714         sin6->sin6_scope_id = scope_id;
 715 }
 716
 717 static inline void
 718 sockaddr_in6_init(struct sockaddr_in6 *sin6, const struct in6_addr *addr,
 719     in_port_t port, uint32_t flowinfo, uint32_t scope_id)
 720 {
 721         sin6->sin6_family = AF_INET6;
 722         sin6->sin6_len = sizeof(*sin6);
 723         sockaddr_in6_init1(sin6, addr, port, flowinfo, scope_id);
 724 }
 725
 726 static inline struct sockaddr *
 727 sockaddr_in6_alloc(const struct in6_addr *addr, in_port_t port,
 728     uint32_t flowinfo, uint32_t scope_id, int flags)
 729 {
 730         struct sockaddr *sa;
 731
 732         if ((sa = sockaddr_alloc(AF_INET6, sizeof(struct sockaddr_in6),
 733             flags)) == NULL)
 734                 return NULL;
 735
 736         sockaddr_in6_init1(satosin6(sa), addr, port, flowinfo, scope_id);
 737
 738         return sa;
 739 }
 740 #endif /* _KERNEL */
 741
 742 #if defined(_NETBSD_SOURCE)
 743
 744 #include <machine/ansi.h>
 745
 746 #ifdef  _BSD_SIZE_T_
 747 typedef _BSD_SIZE_T_            size_t;
 748 #define _SIZE_T
 749 #undef  _BSD_SIZE_T_
 750 #endif
 751
 752 #include <sys/cdefs.h>
 753
 754 __BEGIN_DECLS
 755 struct cmsghdr;
 756
 757 void    in6_sin6_2_sin(struct sockaddr_in *, struct sockaddr_in6 *);
 758 void    in6_sin_2_v4mapsin6(struct sockaddr_in *, struct sockaddr_in6 *);
 759 void    in6_sin6_2_sin_in_sock(struct sockaddr *);
 760 void    in6_sin_2_v4mapsin6_in_sock(struct sockaddr **);
 761
 762 extern int inet6_option_space(int);
 763 extern int inet6_option_init(void *, struct cmsghdr **, int);
 764 extern int inet6_option_append(struct cmsghdr *, const uint8_t *,
 765         int, int);
 766 extern uint8_t *inet6_option_alloc(struct cmsghdr *, int, int, int);
 767 extern int inet6_option_next(const struct cmsghdr *, uint8_t **);
 768 extern int inet6_option_find(const struct cmsghdr *, uint8_t **, int);
 769
 770 extern size_t inet6_rthdr_space(int, int);
 771 extern struct cmsghdr *inet6_rthdr_init(void *, int);
 772 extern int inet6_rthdr_add(struct cmsghdr *, const struct in6_addr *,
 773                 unsigned int);
 774 extern int inet6_rthdr_lasthop(struct cmsghdr *, unsigned int);
 775 #if 0 /* not implemented yet */
 776 extern int inet6_rthdr_reverse(const struct cmsghdr *, struct cmsghdr *);
 777 #endif
 778 extern int inet6_rthdr_segments(const struct cmsghdr *);
 779 extern struct in6_addr *inet6_rthdr_getaddr(struct cmsghdr *, int);
 780 extern int inet6_rthdr_getflags(const struct cmsghdr *, int);
 781
 782 extern int inet6_opt_init(void *, socklen_t);
 783 extern int inet6_opt_append(void *, socklen_t, int, uint8_t,
 784                 socklen_t, uint8_t, void **);
 785 extern int inet6_opt_finish(void *, socklen_t, int);
 786 extern int inet6_opt_set_val(void *, int, void *, socklen_t);
 787
 788 extern int inet6_opt_next(void *, socklen_t, int, uint8_t *,
 789                 socklen_t *, void **);
 790 extern int inet6_opt_find(void *, socklen_t, int, uint8_t,
 791                 socklen_t *, void **);
 792 extern int inet6_opt_get_val(void *, int, void *, socklen_t);
 793 extern socklen_t inet6_rth_space(int, int);
 794 extern void *inet6_rth_init(void *, socklen_t, int, int);
 795 extern int inet6_rth_add(void *, const struct in6_addr *);
 796 extern int inet6_rth_reverse(const void *, void *);
 797 extern int inet6_rth_segments(const void *);
 798 extern struct in6_addr *inet6_rth_getaddr(const void *, int);
 799 __END_DECLS
 800 #endif /* _NETBSD_SOURCE */
 801
 802 #endif /* !_NETINET6_IN6_H_ */