sys/netinet6/in6.h

   1 /*      $NetBSD: in6.h,v 1.85 2015/08/07 08:11:33 ozaki-r 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 #include <sys/featuretest.h>
  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 #include <sys/socket.h>
  74
  75 /*
  76  * Identification of the network protocol stack
  77  * for *BSD-current/release: http://www.kame.net/dev/cvsweb.cgi/kame/COVERAGE
  78  * has the table of implementation/integration differences.
  79  */
  80 #define __KAME__
  81 #define __KAME_VERSION          "NetBSD-current"
  82
  83 /*
  84  * Local port number conventions:
  85  *
  86  * Ports < IPPORT_RESERVED are reserved for privileged processes (e.g. root),
  87  * unless a kernel is compiled with IPNOPRIVPORTS defined.
  88  *
  89  * When a user does a bind(2) or connect(2) with a port number of zero,
  90  * a non-conflicting local port address is chosen.
  91  *
  92  * The default range is IPPORT_ANONMIN to IPPORT_ANONMAX, although
  93  * that is settable by sysctl(3); net.inet.ip.anonportmin and
  94  * net.inet.ip.anonportmax respectively.
  95  *
  96  * A user may set the IPPROTO_IP option IP_PORTRANGE to change this
  97  * default assignment range.
  98  *
  99  * The value IP_PORTRANGE_DEFAULT causes the default behavior.
 100  *
 101  * The value IP_PORTRANGE_HIGH is the same as IP_PORTRANGE_DEFAULT,
 102  * and exists only for FreeBSD compatibility purposes.
 103  *
 104  * The value IP_PORTRANGE_LOW changes the range to the "low" are
 105  * that is (by convention) restricted to privileged processes.
 106  * This convention is based on "vouchsafe" principles only.
 107  * It is only secure if you trust the remote host to restrict these ports.
 108  * The range is IPPORT_RESERVEDMIN to IPPORT_RESERVEDMAX.
 109  */
 110
 111 #if defined(_NETBSD_SOURCE)
 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 #endif
 118
 119 /*
 120  * IPv6 address
 121  */
 122 struct in6_addr {
 123         union {
 124                 __uint8_t   __u6_addr8[16];
 125                 __uint16_t  __u6_addr16[8];
 126                 uint32_t  __u6_addr32[4];
 127         } __u6_addr;                    /* 128-bit IP6 address */
 128 };
 129
 130 #define s6_addr   __u6_addr.__u6_addr8
 131 #ifdef _KERNEL  /* XXX nonstandard */
 132 #define s6_addr8  __u6_addr.__u6_addr8
 133 #define s6_addr16 __u6_addr.__u6_addr16
 134 #define s6_addr32 __u6_addr.__u6_addr32
 135 #endif
 136
 137 #define INET6_ADDRSTRLEN        46
 138
 139 /*
 140  * Socket address for IPv6
 141  */
 142 #if defined(_NETBSD_SOURCE)
 143 #define SIN6_LEN
 144 #endif
 145 struct sockaddr_in6 {
 146         uint8_t         sin6_len;       /* length of this struct(socklen_t)*/
 147         sa_family_t     sin6_family;    /* AF_INET6 (sa_family_t) */
 148         in_port_t       sin6_port;      /* Transport layer port */
 149         uint32_t        sin6_flowinfo;  /* IP6 flow information */
 150         struct in6_addr sin6_addr;      /* IP6 address */
 151         uint32_t        sin6_scope_id;  /* scope zone index */
 152 };
 153
 154 /*
 155  * Local definition for masks
 156  */
 157 #ifdef _KERNEL  /* XXX nonstandard */
 158 #define IN6MASK0        {{{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }}}
 159 #define IN6MASK32       {{{ 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, \
 160                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
 161 #define IN6MASK64       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
 162                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
 163 #define IN6MASK96       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
 164                             0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00 }}}
 165 #define IN6MASK128      {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
 166                             0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}}
 167 #endif
 168
 169 #ifdef _KERNEL
 170 extern const struct sockaddr_in6 sa6_any;
 171
 172 extern const struct in6_addr in6mask0;
 173 extern const struct in6_addr in6mask32;
 174 extern const struct in6_addr in6mask64;
 175 extern const struct in6_addr in6mask96;
 176 extern const struct in6_addr in6mask128;
 177 #endif /* _KERNEL */
 178
 179 /*
 180  * Macros started with IPV6_ADDR is KAME local
 181  */
 182 #ifdef _KERNEL  /* XXX nonstandard */
 183 #if BYTE_ORDER == BIG_ENDIAN
 184 #define IPV6_ADDR_INT32_ONE     1
 185 #define IPV6_ADDR_INT32_TWO     2
 186 #define IPV6_ADDR_INT32_MNL     0xff010000
 187 #define IPV6_ADDR_INT32_MLL     0xff020000
 188 #define IPV6_ADDR_INT32_SMP     0x0000ffff
 189 #define IPV6_ADDR_INT16_ULL     0xfe80
 190 #define IPV6_ADDR_INT16_USL     0xfec0
 191 #define IPV6_ADDR_INT16_MLL     0xff02
 192 #elif BYTE_ORDER == LITTLE_ENDIAN
 193 #define IPV6_ADDR_INT32_ONE     0x01000000
 194 #define IPV6_ADDR_INT32_TWO     0x02000000
 195 #define IPV6_ADDR_INT32_MNL     0x000001ff
 196 #define IPV6_ADDR_INT32_MLL     0x000002ff
 197 #define IPV6_ADDR_INT32_SMP     0xffff0000
 198 #define IPV6_ADDR_INT16_ULL     0x80fe
 199 #define IPV6_ADDR_INT16_USL     0xc0fe
 200 #define IPV6_ADDR_INT16_MLL     0x02ff
 201 #endif
 202 #endif
 203
 204 /*
 205  * Definition of some useful macros to handle IP6 addresses
 206  */
 207 #define IN6ADDR_ANY_INIT \
 208         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 209             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
 210 #define IN6ADDR_LOOPBACK_INIT \
 211         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 212             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 213 #define IN6ADDR_NODELOCAL_ALLNODES_INIT \
 214         {{{ 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 215             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 216 #define IN6ADDR_LINKLOCAL_ALLNODES_INIT \
 217         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 218             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
 219 #define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \
 220         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 221             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}}
 222
 223 extern const struct in6_addr in6addr_any;
 224 extern const struct in6_addr in6addr_loopback;
 225 extern const struct in6_addr in6addr_nodelocal_allnodes;
 226 extern const struct in6_addr in6addr_linklocal_allnodes;
 227 extern const struct in6_addr in6addr_linklocal_allrouters;
 228
 229 #define IN6_ARE_ADDR_EQUAL(a, b)                        \
 230     (memcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
 231
 232 /*
 233  * Unspecified
 234  */
 235 #define IN6_IS_ADDR_UNSPECIFIED(a)      \
 236         ((a)->__u6_addr.__u6_addr32[0] == 0 &&  \
 237          (a)->__u6_addr.__u6_addr32[1] == 0 &&  \
 238          (a)->__u6_addr.__u6_addr32[2] == 0 &&  \
 239          (a)->__u6_addr.__u6_addr32[3] == 0)
 240
 241 /*
 242  * Loopback
 243  */
 244 #define IN6_IS_ADDR_LOOPBACK(a)         \
 245         ((a)->__u6_addr.__u6_addr32[0] == 0 &&  \
 246          (a)->__u6_addr.__u6_addr32[1] == 0 &&  \
 247          (a)->__u6_addr.__u6_addr32[2] == 0 &&  \
 248          (a)->__u6_addr.__u6_addr32[3] == ntohl(1))
 249
 250 /*
 251  * IPv4 compatible
 252  */
 253 #define IN6_IS_ADDR_V4COMPAT(a)         \
 254         ((a)->__u6_addr.__u6_addr32[0] == 0 &&  \
 255          (a)->__u6_addr.__u6_addr32[1] == 0 &&  \
 256          (a)->__u6_addr.__u6_addr32[2] == 0 &&  \
 257          (a)->__u6_addr.__u6_addr32[3] != 0 &&  \
 258          (a)->__u6_addr.__u6_addr32[3] != ntohl(1))
 259
 260 /*
 261  * Mapped
 262  */
 263 #define IN6_IS_ADDR_V4MAPPED(a)               \
 264         ((a)->__u6_addr.__u6_addr32[0] == 0 &&  \
 265          (a)->__u6_addr.__u6_addr32[1] == 0 &&  \
 266          (a)->__u6_addr.__u6_addr32[2] == ntohl(0x0000ffff))
 267
 268 /*
 269  * KAME Scope Values
 270  */
 271
 272 #ifdef _KERNEL  /* XXX nonstandard */
 273 #define IPV6_ADDR_SCOPE_NODELOCAL       0x01
 274 #define IPV6_ADDR_SCOPE_INTFACELOCAL    0x01
 275 #define IPV6_ADDR_SCOPE_LINKLOCAL       0x02
 276 #define IPV6_ADDR_SCOPE_SITELOCAL       0x05
 277 #define IPV6_ADDR_SCOPE_ORGLOCAL        0x08    /* just used in this file */
 278 #define IPV6_ADDR_SCOPE_GLOBAL          0x0e
 279 #else
 280 #define __IPV6_ADDR_SCOPE_NODELOCAL     0x01
 281 #define __IPV6_ADDR_SCOPE_LINKLOCAL     0x02
 282 #define __IPV6_ADDR_SCOPE_SITELOCAL     0x05
 283 #define __IPV6_ADDR_SCOPE_ORGLOCAL      0x08    /* just used in this file */
 284 #define __IPV6_ADDR_SCOPE_GLOBAL        0x0e
 285 #endif
 286
 287 /*
 288  * Unicast Scope
 289  * Note that we must check topmost 10 bits only, not 16 bits (see RFC2373).
 290  */
 291 #define IN6_IS_ADDR_LINKLOCAL(a)        \
 292         (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0x80))
 293 #define IN6_IS_ADDR_SITELOCAL(a)        \
 294         (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0xc0))
 295
 296 /*
 297  * Multicast
 298  */
 299 #define IN6_IS_ADDR_MULTICAST(a)        ((a)->s6_addr[0] == 0xff)
 300
 301 #ifdef _KERNEL  /* XXX nonstandard */
 302 #define IPV6_ADDR_MC_SCOPE(a)           ((a)->s6_addr[1] & 0x0f)
 303 #else
 304 #define __IPV6_ADDR_MC_SCOPE(a)         ((a)->s6_addr[1] & 0x0f)
 305 #endif
 306
 307 /*
 308  * Multicast Scope
 309  */
 310 #ifdef _KERNEL  /* refers nonstandard items */
 311 #define IN6_IS_ADDR_MC_NODELOCAL(a)     \
 312         (IN6_IS_ADDR_MULTICAST(a) &&    \
 313          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_NODELOCAL))
 314 #define IN6_IS_ADDR_MC_INTFACELOCAL(a)  \
 315         (IN6_IS_ADDR_MULTICAST(a) &&    \
 316          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_INTFACELOCAL))
 317 #define IN6_IS_ADDR_MC_LINKLOCAL(a)     \
 318         (IN6_IS_ADDR_MULTICAST(a) &&    \
 319          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_LINKLOCAL))
 320 #define IN6_IS_ADDR_MC_SITELOCAL(a)     \
 321         (IN6_IS_ADDR_MULTICAST(a) &&    \
 322          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_SITELOCAL))
 323 #define IN6_IS_ADDR_MC_ORGLOCAL(a)      \
 324         (IN6_IS_ADDR_MULTICAST(a) &&    \
 325          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_ORGLOCAL))
 326 #define IN6_IS_ADDR_MC_GLOBAL(a)        \
 327         (IN6_IS_ADDR_MULTICAST(a) &&    \
 328          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_GLOBAL))
 329 #else
 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 #define IN6_IS_ADDR_MC_LINKLOCAL(a)     \
 334         (IN6_IS_ADDR_MULTICAST(a) &&    \
 335          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_LINKLOCAL))
 336 #define IN6_IS_ADDR_MC_SITELOCAL(a)     \
 337         (IN6_IS_ADDR_MULTICAST(a) &&    \
 338          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_SITELOCAL))
 339 #define IN6_IS_ADDR_MC_ORGLOCAL(a)      \
 340         (IN6_IS_ADDR_MULTICAST(a) &&    \
 341          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_ORGLOCAL))
 342 #define IN6_IS_ADDR_MC_GLOBAL(a)        \
 343         (IN6_IS_ADDR_MULTICAST(a) &&    \
 344          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_GLOBAL))
 345 #endif
 346
 347 #ifdef _KERNEL  /* nonstandard */
 348 /*
 349  * KAME Scope
 350  */
 351 #define IN6_IS_SCOPE_LINKLOCAL(a)       \
 352         ((IN6_IS_ADDR_LINKLOCAL(a)) ||  \
 353          (IN6_IS_ADDR_MC_LINKLOCAL(a)))
 354
 355 #define IN6_IS_SCOPE_EMBEDDABLE(__a)    \
 356     (IN6_IS_SCOPE_LINKLOCAL(__a) || IN6_IS_ADDR_MC_INTFACELOCAL(__a))
 357
 358 #define IFA6_IS_DEPRECATED(a) \
 359         ((a)->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME && \
 360          (u_int32_t)((time_uptime - (a)->ia6_updatetime)) > \
 361          (a)->ia6_lifetime.ia6t_pltime)
 362 #define IFA6_IS_INVALID(a) \
 363         ((a)->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME && \
 364          (u_int32_t)((time_uptime - (a)->ia6_updatetime)) > \
 365          (a)->ia6_lifetime.ia6t_vltime)
 366 #endif
 367
 368 /*
 369  * Options for use with [gs]etsockopt at the IPV6 level.
 370  * First word of comment is data type; bool is stored in int.
 371  */
 372 /* no hdrincl */
 373 #if 0
 374 /* These are deprecated non-standard options which are no longer supported. */
 375 #define IPV6_OPTIONS            1  /* buf/ip6_opts; set/get IP6 options */
 376 #define IPV6_RECVOPTS           5  /* bool; receive all IP6 opts w/dgram */
 377 #define IPV6_RECVRETOPTS        6  /* bool; receive IP6 opts for response */
 378 #define IPV6_RECVDSTADDR        7  /* bool; receive IP6 dst addr w/dgram */
 379 #define IPV6_RETOPTS            8  /* ip6_opts; set/get IP6 options */
 380 #endif
 381 #define IPV6_SOCKOPT_RESERVED1  3  /* reserved for future use */
 382 #define IPV6_UNICAST_HOPS       4  /* int; IP6 hops */
 383 #define IPV6_MULTICAST_IF       9  /* u_int; set/get IP6 multicast i/f  */
 384 #define IPV6_MULTICAST_HOPS     10 /* int; set/get IP6 multicast hops */
 385 #define IPV6_MULTICAST_LOOP     11 /* u_int; set/get IP6 multicast loopback */
 386 /* The join and leave membership option numbers need to match with the v4 ones */
 387 #define IPV6_JOIN_GROUP         12 /* ip6_mreq; join a group membership */
 388 #define IPV6_LEAVE_GROUP        13 /* ip6_mreq; leave a group membership */
 389 #define IPV6_PORTRANGE          14 /* int; range to choose for unspec port */
 390 #if defined(_NETBSD_SOURCE)
 391 #define IPV6_PORTALGO           17 /* int; port selection algo (rfc6056) */
 392 #define ICMP6_FILTER            18 /* icmp6_filter; icmp6 filter */
 393 #endif
 394 /* RFC2292 options */
 395 #ifdef _KERNEL
 396 #define IPV6_2292PKTINFO        19 /* bool; send/recv if, src/dst addr */
 397 #define IPV6_2292HOPLIMIT       20 /* bool; hop limit */
 398 #define IPV6_2292NEXTHOP        21 /* bool; next hop addr */
 399 #define IPV6_2292HOPOPTS        22 /* bool; hop-by-hop option */
 400 #define IPV6_2292DSTOPTS        23 /* bool; destination option */
 401 #define IPV6_2292RTHDR          24 /* bool; routing header */
 402 #define IPV6_2292PKTOPTIONS     25 /* buf/cmsghdr; set/get IPv6 options */
 403 #endif
 404 #define IPV6_CHECKSUM           26 /* int; checksum offset for raw socket */
 405 #define IPV6_V6ONLY             27 /* bool; make AF_INET6 sockets v6 only */
 406
 407 #define IPV6_IPSEC_POLICY       28 /* struct; get/set security policy */
 408 #define IPV6_FAITH              29 /* bool; accept FAITH'ed connections */
 409
 410 /* new socket options introduced in RFC3542 */
 411 #define IPV6_RTHDRDSTOPTS       35 /* ip6_dest; send dst option before rthdr */
 412
 413 #define IPV6_RECVPKTINFO        36 /* bool; recv if, dst addr */
 414 #define IPV6_RECVHOPLIMIT       37 /* bool; recv hop limit */
 415 #define IPV6_RECVRTHDR          38 /* bool; recv routing header */
 416 #define IPV6_RECVHOPOPTS        39 /* bool; recv hop-by-hop option */
 417 #define IPV6_RECVDSTOPTS        40 /* bool; recv dst option after rthdr */
 418 #ifdef _KERNEL
 419 #define IPV6_RECVRTHDRDSTOPTS   41 /* bool; recv dst option before rthdr */
 420 #endif
 421 #define IPV6_USE_MIN_MTU        42 /* bool; send packets at the minimum MTU */
 422 #define IPV6_RECVPATHMTU        43 /* bool; notify an according MTU */
 423 #define IPV6_PATHMTU            44 /* mtuinfo; get the current path MTU (sopt),
 424                                       4 bytes int; MTU notification (cmsg) */
 425
 426 /* more new socket options introduced in RFC3542 */
 427 #define IPV6_PKTINFO            46 /* in6_pktinfo; send if, src addr */
 428 #define IPV6_HOPLIMIT           47 /* int; send hop limit */
 429 #define IPV6_NEXTHOP            48 /* sockaddr; next hop addr */
 430 #define IPV6_HOPOPTS            49 /* ip6_hbh; send hop-by-hop option */
 431 #define IPV6_DSTOPTS            50 /* ip6_dest; send dst option befor rthdr */
 432 #define IPV6_RTHDR              51 /* ip6_rthdr; send routing header */
 433
 434 #define IPV6_RECVTCLASS         57 /* bool; recv traffic class values */
 435 #ifdef _KERNEL
 436 #define IPV6_OTCLASS            58 /* u_int8_t; send traffic class value */
 437 #endif
 438
 439 #define IPV6_TCLASS             61 /* int; send traffic class value */
 440 #define IPV6_DONTFRAG           62 /* bool; disable IPv6 fragmentation */
 441 #define IPV6_PREFER_TEMPADDR    63 /* int; prefer temporary address as
 442                                     * the sorce address */
 443 /* to define items, should talk with KAME guys first, for *BSD compatibility */
 444
 445 #define IPV6_RTHDR_LOOSE     0 /* this hop need not be a neighbor. XXX old spec */
 446 #define IPV6_RTHDR_STRICT    1 /* this hop must be a neighbor. XXX old spec */
 447 #define IPV6_RTHDR_TYPE_0    0 /* IPv6 routing header type 0 */
 448
 449 /*
 450  * Defaults and limits for options
 451  */
 452 #define IPV6_DEFAULT_MULTICAST_HOPS 1   /* normally limit m'casts to 1 hop  */
 453 #define IPV6_DEFAULT_MULTICAST_LOOP 1   /* normally hear sends if a member  */
 454
 455 /*
 456  * Argument structure for IPV6_JOIN_GROUP and IPV6_LEAVE_GROUP.
 457  */
 458 struct ipv6_mreq {
 459         struct in6_addr ipv6mr_multiaddr;
 460         unsigned int    ipv6mr_interface;
 461 };
 462
 463 /*
 464  * IPV6_PKTINFO: Packet information(RFC2292 sec 5)
 465  */
 466 struct in6_pktinfo {
 467         struct in6_addr ipi6_addr;      /* src/dst IPv6 address */
 468         unsigned int    ipi6_ifindex;   /* send/recv interface index */
 469 };
 470
 471 /*
 472  * Control structure for IPV6_RECVPATHMTU socket option.
 473  */
 474 struct ip6_mtuinfo {
 475         struct sockaddr_in6 ip6m_addr;  /* or sockaddr_storage? */
 476         uint32_t ip6m_mtu;
 477 };
 478
 479 /*
 480  * Argument for IPV6_PORTRANGE:
 481  * - which range to search when port is unspecified at bind() or connect()
 482  */
 483 #define IPV6_PORTRANGE_DEFAULT  0       /* default range */
 484 #define IPV6_PORTRANGE_HIGH     1       /* "high" - request firewall bypass */
 485 #define IPV6_PORTRANGE_LOW      2       /* "low" - vouchsafe security */
 486
 487 #if defined(_NETBSD_SOURCE)
 488 /*
 489  * Definitions for inet6 sysctl operations.
 490  *
 491  * Third level is protocol number.
 492  * Fourth level is desired variable within that protocol.
 493  */
 494 #define IPV6PROTO_MAXID (IPPROTO_PIM + 1)       /* don't list to IPV6PROTO_MAX */
 495
 496 #define CTL_IPV6PROTO_NAMES { \
 497         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 498         { 0, 0 }, \
 499         { "tcp6", CTLTYPE_NODE }, \
 500         { 0, 0 }, \
 501         { 0, 0 }, \
 502         { 0, 0 }, \
 503         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 504         { 0, 0 }, \
 505         { 0, 0 }, \
 506         { "udp6", CTLTYPE_NODE }, \
 507         { 0, 0 }, \
 508         { 0, 0 }, \
 509         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 510         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 511         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 512         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 513         { 0, 0 }, \
 514         { "ip6", CTLTYPE_NODE }, \
 515         { 0, 0 }, \
 516         { 0, 0 }, \
 517         { 0, 0 }, \
 518         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 519         { 0, 0 }, \
 520         { "ipsec6", CTLTYPE_NODE }, \
 521         { 0, 0 }, \
 522         { 0, 0 }, \
 523         { 0, 0 }, \
 524         { 0, 0 }, \
 525         { 0, 0 }, \
 526         { 0, 0 }, \
 527         { "icmp6", CTLTYPE_NODE }, \
 528         { 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 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 534         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 535         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 536         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
 537         { 0, 0 }, \
 538         { 0, 0 }, \
 539         { 0, 0 }, \
 540         { "pim6", CTLTYPE_NODE }, \
 541 }
 542
 543 /*
 544  * Names for IP sysctl objects
 545  */
 546 #define IPV6CTL_FORWARDING      1       /* act as router */
 547 #define IPV6CTL_SENDREDIRECTS   2       /* may send redirects when forwarding*/
 548 #define IPV6CTL_DEFHLIM         3       /* default Hop-Limit */
 549 #ifdef notyet
 550 #define IPV6CTL_DEFMTU          4       /* default MTU */
 551 #endif
 552 #define IPV6CTL_FORWSRCRT       5       /* forward source-routed dgrams */
 553 #define IPV6CTL_STATS           6       /* stats */
 554 #define IPV6CTL_MRTSTATS        7       /* multicast forwarding stats */
 555 #define IPV6CTL_MRTPROTO        8       /* multicast routing protocol */
 556 #define IPV6CTL_MAXFRAGPACKETS  9       /* max packets reassembly queue */
 557 #define IPV6CTL_SOURCECHECK     10      /* verify source route and intf */
 558 #define IPV6CTL_SOURCECHECK_LOGINT 11   /* minimume logging interval */
 559 #define IPV6CTL_ACCEPT_RTADV    12
 560 #define IPV6CTL_KEEPFAITH       13
 561 #define IPV6CTL_LOG_INTERVAL    14
 562 #define IPV6CTL_HDRNESTLIMIT    15
 563 #define IPV6CTL_DAD_COUNT       16
 564 #define IPV6CTL_AUTO_FLOWLABEL  17
 565 #define IPV6CTL_DEFMCASTHLIM    18
 566 #define IPV6CTL_GIF_HLIM        19      /* default HLIM for gif encap packet */
 567 #define IPV6CTL_KAME_VERSION    20
 568 #define IPV6CTL_USE_DEPRECATED  21      /* use deprecated addr (RFC2462 5.5.4) */
 569 #define IPV6CTL_RR_PRUNE        22      /* walk timer for router renumbering */
 570 /* 23: reserved */
 571 #define IPV6CTL_V6ONLY          24
 572 /* 25 to 27: reserved */
 573 #define IPV6CTL_ANONPORTMIN     28      /* minimum ephemeral port */
 574 #define IPV6CTL_ANONPORTMAX     29      /* maximum ephemeral port */
 575 #define IPV6CTL_LOWPORTMIN      30      /* minimum reserved port */
 576 #define IPV6CTL_LOWPORTMAX      31      /* maximum reserved port */
 577 /* 32 to 34: reserved */
 578 #define IPV6CTL_AUTO_LINKLOCAL  35      /* automatic link-local addr assign */
 579 /* 36 to 38: reserved */
 580 #define IPV6CTL_USE_DEFAULTZONE 39      /* use default scope zone */
 581 /* 40: reserved */
 582 #define IPV6CTL_MAXFRAGS        41      /* max fragments */
 583 #define IPV6CTL_IFQ             42      /* IPv6 packet input queue */
 584 #define IPV6CTL_RTADV_MAXROUTES 43      /* maximum number of routes */
 585                                         /* via router advertisement */
 586 #define IPV6CTL_RTADV_NUMROUTES 44      /* current number of routes */
 587                                         /* via router advertisement */
 588 /* New entries should be added here from current IPV6CTL_MAXID value. */
 589 /* to define items, should talk with KAME guys first, for *BSD compatibility */
 590 #define IPV6CTL_MAXID           45
 591
 592 #define IPV6CTL_NAMES { \
 593         { 0, 0 }, \
 594         { "forwarding", CTLTYPE_INT }, \
 595         { "redirect", CTLTYPE_INT }, \
 596         { "hlim", CTLTYPE_INT }, \
 597         { "mtu", CTLTYPE_INT }, \
 598         { "forwsrcrt", CTLTYPE_INT }, \
 599         { "stats", CTLTYPE_STRUCT }, \
 600         { 0, 0 }, \
 601         { "mrtproto", CTLTYPE_INT }, \
 602         { "maxfragpackets", CTLTYPE_INT }, \
 603         { "sourcecheck", CTLTYPE_INT }, \
 604         { "sourcecheck_logint", CTLTYPE_INT }, \
 605         { "accept_rtadv", CTLTYPE_INT }, \
 606         { "keepfaith", CTLTYPE_INT }, \
 607         { "log_interval", CTLTYPE_INT }, \
 608         { "hdrnestlimit", CTLTYPE_INT }, \
 609         { "dad_count", CTLTYPE_INT }, \
 610         { "auto_flowlabel", CTLTYPE_INT }, \
 611         { "defmcasthlim", CTLTYPE_INT }, \
 612         { "gifhlim", CTLTYPE_INT }, \
 613         { "kame_version", CTLTYPE_STRING }, \
 614         { "use_deprecated", CTLTYPE_INT }, \
 615         { "rr_prune", CTLTYPE_INT }, \
 616         { 0, 0 }, \
 617         { "v6only", CTLTYPE_INT }, \
 618         { 0, 0 }, \
 619         { 0, 0 }, \
 620         { 0, 0 }, \
 621         { "anonportmin", CTLTYPE_INT }, \
 622         { "anonportmax", CTLTYPE_INT }, \
 623         { "lowportmin", CTLTYPE_INT }, \
 624         { "lowportmax", CTLTYPE_INT }, \
 625         { 0, 0 }, \
 626         { 0, 0 }, \
 627         { 0, 0 }, \
 628         { 0, 0 }, \
 629         { 0, 0 }, \
 630         { 0, 0 }, \
 631         { 0, 0 }, \
 632         { 0, 0 }, \
 633         { 0, 0 }, \
 634         { "maxfrags", CTLTYPE_INT }, \
 635         { "ifq", CTLTYPE_NODE }, \
 636         { "rtadv_maxroutes", CTLTYPE_INT }, \
 637         { "rtadv_numroutes", CTLTYPE_INT }, \
 638 }
 639
 640 #endif /* _NETBSD_SOURCE */
 641
 642 #ifdef _KERNEL
 643 struct cmsghdr;
 644
 645 /*
 646  * in6_cksum_phdr:
 647  *
 648  *      Compute significant parts of the IPv6 checksum pseudo-header
 649  *      for use in a delayed TCP/UDP checksum calculation.
 650  *
 651  *      Args:
 652  *
 653  *              src             Source IPv6 address
 654  *              dst             Destination IPv6 address
 655  *              len             htonl(proto-hdr-len)
 656  *              nxt             htonl(next-proto-number)
 657  *
 658  *      NOTE: We expect the src and dst addresses to be 16-bit
 659  *      aligned!
 660  */
 661 static __inline u_int16_t __unused
 662 in6_cksum_phdr(const struct in6_addr *src, const struct in6_addr *dst,
 663     u_int32_t len, u_int32_t nxt)
 664 {
 665         u_int32_t sum = 0;
 666         const u_int16_t *w;
 667
 668         /*LINTED*/
 669         w = (const u_int16_t *) src;
 670         sum += w[0];
 671         if (!IN6_IS_SCOPE_LINKLOCAL(src))
 672                 sum += w[1];
 673         sum += w[2]; sum += w[3]; sum += w[4]; sum += w[5];
 674         sum += w[6]; sum += w[7];
 675
 676         /*LINTED*/
 677         w = (const u_int16_t *) dst;
 678         sum += w[0];
 679         if (!IN6_IS_SCOPE_LINKLOCAL(dst))
 680                 sum += w[1];
 681         sum += w[2]; sum += w[3]; sum += w[4]; sum += w[5];
 682         sum += w[6]; sum += w[7];
 683
 684         sum += (u_int16_t)(len >> 16) + (u_int16_t)(len /*& 0xffff*/);
 685
 686         sum += (u_int16_t)(nxt >> 16) + (u_int16_t)(nxt /*& 0xffff*/);
 687
 688         sum = (u_int16_t)(sum >> 16) + (u_int16_t)(sum /*& 0xffff*/);
 689
 690         if (sum > 0xffff)
 691                 sum -= 0xffff;
 692
 693         return (sum);
 694 }
 695
 696 struct mbuf;
 697 struct ifnet;
 698 int sockaddr_in6_cmp(const struct sockaddr *, const struct sockaddr *);
 699 struct sockaddr *sockaddr_in6_externalize(struct sockaddr *, socklen_t,
 700     const struct sockaddr *);
 701 int     in6_cksum(struct mbuf *, u_int8_t, u_int32_t, u_int32_t);
 702 void    in6_delayed_cksum(struct mbuf *);
 703 int     in6_localaddr(const struct in6_addr *);
 704 int     in6_addrscope(const struct in6_addr *);
 705 struct  in6_ifaddr *in6_ifawithifp(struct ifnet *, struct in6_addr *);
 706 extern void in6_if_link_up(struct ifnet *);
 707 extern void in6_if_link_down(struct ifnet *);
 708 extern void in6_if_link_state_change(struct ifnet *, int);
 709 extern void in6_if_up(struct ifnet *);
 710 extern void in6_if_down(struct ifnet *);
 711 #ifndef __FreeBSD__
 712 extern int in6_src_sysctl(void *, size_t *, void *, size_t);
 713 #endif
 714 extern void addrsel_policy_init(void);
 715 extern  u_char  ip6_protox[];
 716
 717 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
 718 #define satocsin6(sa)   ((const struct sockaddr_in6 *)(sa))
 719 #define sin6tosa(sin6)  ((struct sockaddr *)(sin6))
 720 #define sin6tocsa(sin6) ((const struct sockaddr *)(sin6))
 721 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
 722
 723 static inline void
 724 sockaddr_in6_init1(struct sockaddr_in6 *sin6, const struct in6_addr *addr,
 725     in_port_t port, uint32_t flowinfo, uint32_t scope_id)
 726 {
 727         sin6->sin6_port = port;
 728         sin6->sin6_flowinfo = flowinfo;
 729         sin6->sin6_addr = *addr;
 730         sin6->sin6_scope_id = scope_id;
 731 }
 732
 733 static inline void
 734 sockaddr_in6_init(struct sockaddr_in6 *sin6, const struct in6_addr *addr,
 735     in_port_t port, uint32_t flowinfo, uint32_t scope_id)
 736 {
 737         sin6->sin6_family = AF_INET6;
 738         sin6->sin6_len = sizeof(*sin6);
 739         sockaddr_in6_init1(sin6, addr, port, flowinfo, scope_id);
 740 }
 741
 742 static inline struct sockaddr *
 743 sockaddr_in6_alloc(const struct in6_addr *addr, in_port_t port,
 744     uint32_t flowinfo, uint32_t scope_id, int flags)
 745 {
 746         struct sockaddr *sa;
 747
 748         if ((sa = sockaddr_alloc(AF_INET6, sizeof(struct sockaddr_in6),
 749             flags)) == NULL)
 750                 return NULL;
 751
 752         sockaddr_in6_init1(satosin6(sa), addr, port, flowinfo, scope_id);
 753
 754         return sa;
 755 }
 756 #endif /* _KERNEL */
 757
 758 #if defined(_NETBSD_SOURCE)
 759
 760 #include <machine/ansi.h>
 761
 762 #ifdef  _BSD_SIZE_T_
 763 typedef _BSD_SIZE_T_            size_t;
 764 #define _SIZE_T
 765 #undef  _BSD_SIZE_T_
 766 #endif
 767
 768 #include <sys/cdefs.h>
 769
 770 __BEGIN_DECLS
 771 struct cmsghdr;
 772
 773 void    in6_sin6_2_sin(struct sockaddr_in *, struct sockaddr_in6 *);
 774 void    in6_sin_2_v4mapsin6(const struct sockaddr_in *, struct sockaddr_in6 *);
 775 void    in6_sin6_2_sin_in_sock(struct sockaddr *);
 776 void    in6_sin_2_v4mapsin6_in_sock(struct sockaddr **);
 777
 778 #define INET6_IS_ADDR_LINKLOCAL         1
 779 #define INET6_IS_ADDR_MC_LINKLOCAL      2
 780 #define INET6_IS_ADDR_SITELOCAL         4
 781 void    inet6_getscopeid(struct sockaddr_in6 *, int);
 782 void    inet6_putscopeid(struct sockaddr_in6 *, int);
 783
 784 extern int inet6_option_space(int);
 785 extern int inet6_option_init(void *, struct cmsghdr **, int);
 786 extern int inet6_option_append(struct cmsghdr *, const uint8_t *,
 787         int, int);
 788 extern uint8_t *inet6_option_alloc(struct cmsghdr *, int, int, int);
 789 extern int inet6_option_next(const struct cmsghdr *, uint8_t **);
 790 extern int inet6_option_find(const struct cmsghdr *, uint8_t **, int);
 791
 792 extern size_t inet6_rthdr_space(int, int);
 793 extern struct cmsghdr *inet6_rthdr_init(void *, int);
 794 extern int inet6_rthdr_add(struct cmsghdr *, const struct in6_addr *,
 795                 unsigned int);
 796 extern int inet6_rthdr_lasthop(struct cmsghdr *, unsigned int);
 797 #if 0 /* not implemented yet */
 798 extern int inet6_rthdr_reverse(const struct cmsghdr *, struct cmsghdr *);
 799 #endif
 800 extern int inet6_rthdr_segments(const struct cmsghdr *);
 801 extern struct in6_addr *inet6_rthdr_getaddr(struct cmsghdr *, int);
 802 extern int inet6_rthdr_getflags(const struct cmsghdr *, int);
 803
 804 extern int inet6_opt_init(void *, socklen_t);
 805 extern int inet6_opt_append(void *, socklen_t, int, uint8_t,
 806                 socklen_t, uint8_t, void **);
 807 extern int inet6_opt_finish(void *, socklen_t, int);
 808 extern int inet6_opt_set_val(void *, int, void *, socklen_t);
 809
 810 extern int inet6_opt_next(void *, socklen_t, int, uint8_t *,
 811                 socklen_t *, void **);
 812 extern int inet6_opt_find(void *, socklen_t, int, uint8_t,
 813                 socklen_t *, void **);
 814 extern int inet6_opt_get_val(void *, int, void *, socklen_t);
 815 extern socklen_t inet6_rth_space(int, int);
 816 extern void *inet6_rth_init(void *, socklen_t, int, int);
 817 extern int inet6_rth_add(void *, const struct in6_addr *);
 818 extern int inet6_rth_reverse(const void *, void *);
 819 extern int inet6_rth_segments(const void *);
 820 extern struct in6_addr *inet6_rth_getaddr(const void *, int);
 821 __END_DECLS
 822 #endif /* _NETBSD_SOURCE */
 823
 824 #if defined(_KERNEL) || defined(_TEST)
 825 int     in6_print(char *, size_t, const struct in6_addr *);
 826 #define IN6_PRINT(b, a) (in6_print((b), sizeof(b), (a)), (b))
 827 int     sin6_print(char *, size_t, const void *);
 828 #endif
 829
 830 #endif /* !_NETINET6_IN6_H_ */