The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/netinet6/in6.h

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    1 /*      $FreeBSD: src/sys/netinet6/in6.h,v 1.7.2.7 2002/08/01 19:38:50 ume Exp $        */
    2 /*      $DragonFly: src/sys/netinet6/in6.h,v 1.12 2008/09/14 08:58:33 hasso Exp $       */
    3 /*      $KAME: in6.h,v 1.89 2001/05/27 13:28:35 itojun Exp $    */
    4 
    5 /*
    6  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
    7  * All rights reserved.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  * 3. Neither the name of the project nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  */
   33 
   34 /*
   35  * Copyright (c) 1982, 1986, 1990, 1993
   36  *      The Regents of the University of California.  All rights reserved.
   37  *
   38  * Redistribution and use in source and binary forms, with or without
   39  * modification, are permitted provided that the following conditions
   40  * are met:
   41  * 1. Redistributions of source code must retain the above copyright
   42  *    notice, this list of conditions and the following disclaimer.
   43  * 2. Redistributions in binary form must reproduce the above copyright
   44  *    notice, this list of conditions and the following disclaimer in the
   45  *    documentation and/or other materials provided with the distribution.
   46  * 3. All advertising materials mentioning features or use of this software
   47  *    must display the following acknowledgement:
   48  *      This product includes software developed by the University of
   49  *      California, Berkeley and its contributors.
   50  * 4. Neither the name of the University nor the names of its contributors
   51  *    may be used to endorse or promote products derived from this software
   52  *    without specific prior written permission.
   53  *
   54  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   55  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   56  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   57  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   58  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   59  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   60  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   61  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   62  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   63  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   64  * SUCH DAMAGE.
   65  *
   66  *      @(#)in.h        8.3 (Berkeley) 1/3/94
   67  */
   68 
   69 #ifndef __KAME_NETINET_IN_H_INCLUDED_
   70 #error "do not include netinet6/in6.h directly, include netinet/in.h.  see RFC2553"
   71 #endif
   72 
   73 #ifndef _NETINET6_IN6_H_
   74 #define _NETINET6_IN6_H_
   75 
   76 /*
   77  * Identification of the network protocol stack
   78  * for *BSD-current/release: http://www.kame.net/dev/cvsweb.cgi/kame/COVERAGE
   79  * has the table of implementation/integration differences.
   80  */
   81 #define __KAME__
   82 #define __KAME_VERSION          "20010528/FreeBSD"
   83 
   84 #ifndef _SOCKLEN_T_DECLARED
   85 #define _SOCKLEN_T_DECLARED
   86 typedef __socklen_t     socklen_t;
   87 #endif
   88 
   89 /*
   90  * Local port number conventions:
   91  *
   92  * Ports < IPPORT_RESERVED are reserved for privileged processes (e.g. root),
   93  * unless a kernel is compiled with IPNOPRIVPORTS defined.
   94  *
   95  * When a user does a bind(2) or connect(2) with a port number of zero,
   96  * a non-conflicting local port address is chosen.
   97  *
   98  * The default range is IPPORT_ANONMIN to IPPORT_ANONMAX, although
   99  * that is settable by sysctl(3); net.inet.ip.anonportmin and
  100  * net.inet.ip.anonportmax respectively.
  101  *
  102  * A user may set the IPPROTO_IP option IP_PORTRANGE to change this
  103  * default assignment range.
  104  *
  105  * The value IP_PORTRANGE_DEFAULT causes the default behavior.
  106  *
  107  * The value IP_PORTRANGE_HIGH is the same as IP_PORTRANGE_DEFAULT,
  108  * and exists only for FreeBSD compatibility purposes.
  109  *
  110  * The value IP_PORTRANGE_LOW changes the range to the "low" are
  111  * that is (by convention) restricted to privileged processes.
  112  * This convention is based on "vouchsafe" principles only.
  113  * It is only secure if you trust the remote host to restrict these ports.
  114  * The range is IPPORT_RESERVEDMIN to IPPORT_RESERVEDMAX.
  115  */
  116 
  117 #define IPV6PORT_RESERVED       1024
  118 #define IPV6PORT_ANONMIN        49152
  119 #define IPV6PORT_ANONMAX        65535
  120 #define IPV6PORT_RESERVEDMIN    600
  121 #define IPV6PORT_RESERVEDMAX    (IPV6PORT_RESERVED-1)
  122 
  123 /*
  124  * IPv6 address
  125  */
  126 #ifndef _STRUCT_IN6_ADDR_DECLARED
  127 struct in6_addr {
  128         union {
  129                 uint8_t   __u6_addr8[16];
  130                 uint16_t  __u6_addr16[8];
  131                 uint32_t  __u6_addr32[4];
  132         } __u6_addr;                    /* 128-bit IP6 address */
  133 };
  134 #define _STRUCT_IN6_ADDR_DECLARED
  135 #endif
  136 
  137 #define s6_addr         __u6_addr.__u6_addr8
  138 #define _s6_addr16      __u6_addr.__u6_addr16           /* internal use */
  139 #define _s6_addr32      __u6_addr.__u6_addr32           /* internal use */
  140 #if __BSD_VISIBLE                                       /* XXX nonstandard */
  141 #define s6_addr8        __u6_addr.__u6_addr8
  142 #define s6_addr16       __u6_addr.__u6_addr16
  143 #define s6_addr32       __u6_addr.__u6_addr32
  144 #endif
  145 
  146 #define INET6_ADDRSTRLEN        46
  147 
  148 /*
  149  * Socket address for IPv6
  150  */
  151 #ifndef _XOPEN_SOURCE
  152 #define SIN6_LEN
  153 #endif
  154 struct sockaddr_in6 {
  155         uint8_t         sin6_len;       /* length of this struct(sa_family_t)*/
  156         uint8_t         sin6_family;    /* AF_INET6 (sa_family_t) */
  157         uint16_t        sin6_port;      /* Transport layer port # (in_port_t)*/
  158         uint32_t        sin6_flowinfo;  /* IP6 flow information */
  159         struct in6_addr sin6_addr;      /* IP6 address */
  160         uint32_t        sin6_scope_id;  /* scope zone index */
  161 };
  162 
  163 /*
  164  * Local definition for masks
  165  */
  166 #ifdef _KERNEL  /* XXX nonstandard */
  167 #define IN6MASK0        {{{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }}}
  168 #define IN6MASK32       {{{ 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, \
  169                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
  170 #define IN6MASK64       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
  171                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
  172 #define IN6MASK96       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
  173                             0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00 }}}
  174 #define IN6MASK128      {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
  175                             0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}}
  176 #endif
  177 
  178 #ifdef _KERNEL
  179 extern const struct sockaddr_in6 sa6_any;
  180 
  181 extern const struct in6_addr in6mask0;
  182 extern const struct in6_addr in6mask32;
  183 extern const struct in6_addr in6mask64;
  184 extern const struct in6_addr in6mask96;
  185 extern const struct in6_addr in6mask128;
  186 #endif /* _KERNEL */
  187 
  188 /*
  189  * Macros started with IPV6_ADDR is KAME local
  190  */
  191 #if BYTE_ORDER == BIG_ENDIAN
  192 #define _IPV6_ADDR_INT16_UL_MASK        0xffc0
  193 #define _IPV6_ADDR_INT16_ULL            0xfe80
  194 #define _IPV6_ADDR_INT16_USL            0xfec0
  195 #else
  196 #define _IPV6_ADDR_INT16_UL_MASK        0xc0ff
  197 #define _IPV6_ADDR_INT16_ULL            0x80fe
  198 #define _IPV6_ADDR_INT16_USL            0xc0fe
  199 #endif
  200 
  201 #ifdef _KERNEL  /* XXX nonstandard */
  202 #if BYTE_ORDER == BIG_ENDIAN
  203 #define IPV6_ADDR_INT32_ONE     1
  204 #define IPV6_ADDR_INT32_TWO     2
  205 #define IPV6_ADDR_INT32_MNL     0xff010000
  206 #define IPV6_ADDR_INT32_MLL     0xff020000
  207 #define IPV6_ADDR_INT32_SMP     0x0000ffff
  208 #define IPV6_ADDR_INT16_MLL     0xff02
  209 #elif BYTE_ORDER == LITTLE_ENDIAN
  210 #define IPV6_ADDR_INT32_ONE     0x01000000
  211 #define IPV6_ADDR_INT32_TWO     0x02000000
  212 #define IPV6_ADDR_INT32_MNL     0x000001ff
  213 #define IPV6_ADDR_INT32_MLL     0x000002ff
  214 #define IPV6_ADDR_INT32_SMP     0xffff0000
  215 #define IPV6_ADDR_INT16_MLL     0x02ff
  216 #endif
  217 #define IPV6_ADDR_INT16_ULL     _IPV6_ADDR_INT16_ULL
  218 #define IPV6_ADDR_INT16_USL     _IPV6_ADDR_INT16_USL
  219 #endif
  220 
  221 /*
  222  * Definition of some useful macros to handle IP6 addresses
  223  */
  224 #define IN6ADDR_ANY_INIT                                                \
  225         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             \
  226             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
  227 #define IN6ADDR_LOOPBACK_INIT                                           \
  228         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             \
  229             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
  230 #define IN6ADDR_NODELOCAL_ALLNODES_INIT                                 \
  231         {{{ 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             \
  232             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
  233 #define IN6ADDR_LINKLOCAL_ALLNODES_INIT                                 \
  234         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             \
  235             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
  236 #define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT                               \
  237         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             \
  238             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}}
  239 
  240 #ifdef _KERNEL
  241 extern const struct in6_addr kin6addr_any;
  242 extern const struct in6_addr kin6addr_loopback;
  243 extern const struct in6_addr kin6addr_nodelocal_allnodes;
  244 extern const struct in6_addr kin6addr_linklocal_allnodes;
  245 extern const struct in6_addr kin6addr_linklocal_allrouters;
  246 #else
  247 extern const struct in6_addr in6addr_any;
  248 extern const struct in6_addr in6addr_loopback;
  249 extern const struct in6_addr in6addr_nodelocal_allnodes;
  250 extern const struct in6_addr in6addr_linklocal_allnodes;
  251 #endif
  252 
  253 #define IN6_ARE_ADDR_EQUAL(a, b)                                        \
  254     (memcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
  255 
  256 #ifdef _KERNEL                  /* non standard */
  257 /* see if two addresses are equal in a scope-conscious manner. */
  258 #define SA6_ARE_ADDR_EQUAL(a, b) \
  259         (((a)->sin6_scope_id == 0 || (b)->sin6_scope_id == 0 ||         \
  260           (a)->sin6_scope_id == (b)->sin6_scope_id) &&                  \
  261          (bcmp(&(a)->sin6_addr, &(b)->sin6_addr, sizeof(struct in6_addr)) == 0))
  262 #endif
  263 
  264 /*
  265  * Unspecified
  266  */
  267 #define IN6_IS_ADDR_UNSPECIFIED(a)                                      \
  268         ((a)->_s6_addr32[0] == 0 && (a)->_s6_addr32[1] == 0 &&          \
  269          (a)->_s6_addr32[2] == 0 && (a)->_s6_addr32[3] == 0)
  270 
  271 /*
  272  * Loopback
  273  */
  274 #define IN6_IS_ADDR_LOOPBACK(a)                                         \
  275         ((a)->_s6_addr32[0] == 0 && (a)->_s6_addr32[1] == 0 &&  \
  276          (a)->_s6_addr32[2] == 0 && (a)->_s6_addr32[3] == ntohl(1))
  277 
  278 /*
  279  * Mapped
  280  */
  281 #define IN6_IS_ADDR_V4MAPPED(a)                                         \
  282         ((a)->_s6_addr32[0] == 0 && (a)->_s6_addr32[1] == 0 &&          \
  283          (a)->_s6_addr32[2] == ntohl(0x0000ffff))
  284 
  285 /*
  286  * IPv4 compatible.  Deprecated by RFC4291.
  287  */
  288 #define IN6_IS_ADDR_V4COMPAT(a)                                         \
  289         ((a)->_s6_addr32[0] == 0 &&                                     \
  290          (a)->_s6_addr32[1] == 0 &&                                     \
  291          (a)->_s6_addr32[2] == 0 &&                                     \
  292          (a)->_s6_addr32[3] != 0 && (a)->_s6_addr32[3] != ntohl(1))
  293 
  294 /*
  295  * KAME Scope Values
  296  */
  297 
  298 #define __IPV6_ADDR_SCOPE_NODELOCAL     0x01
  299 #define __IPV6_ADDR_SCOPE_LINKLOCAL     0x02
  300 #define __IPV6_ADDR_SCOPE_SITELOCAL     0x05
  301 #define __IPV6_ADDR_SCOPE_ORGLOCAL      0x08    /* just used in this file */
  302 #define __IPV6_ADDR_SCOPE_GLOBAL        0x0e
  303 
  304 #ifdef _KERNEL                                  /* XXX nonstandard */
  305 #define IPV6_ADDR_SCOPE_NODELOCAL       0x01
  306 #define IPV6_ADDR_SCOPE_INTFACELOCAL    0x01
  307 #define IPV6_ADDR_SCOPE_LINKLOCAL       0x02
  308 #define IPV6_ADDR_SCOPE_SITELOCAL       0x05
  309 #define IPV6_ADDR_SCOPE_ORGLOCAL        0x08    /* just used in this file */
  310 #define IPV6_ADDR_SCOPE_GLOBAL          0x0e
  311 #endif
  312 
  313 /*
  314  * Unicast Scope
  315  * Note that we must check topmost 10 bits only, not 16 bits (see RFC2373).
  316  */
  317 #define IN6_IS_ADDR_LINKLOCAL(a)                                        \
  318     (((a)->_s6_addr16[0] & _IPV6_ADDR_INT16_UL_MASK) == _IPV6_ADDR_INT16_ULL)
  319 #define IN6_IS_ADDR_SITELOCAL(a)                                        \
  320     (((a)->_s6_addr16[0] & _IPV6_ADDR_INT16_UL_MASK) == _IPV6_ADDR_INT16_USL)
  321 
  322 /*
  323  * Multicast
  324  */
  325 #define IN6_IS_ADDR_MULTICAST(a)        ((a)->s6_addr[0] == 0xff)
  326 #define __IPV6_ADDR_MC_SCOPE(a)         ((a)->s6_addr[1] & 0x0f)
  327 #ifdef _KERNEL                                  /* XXX nonstandard */
  328 #define IPV6_ADDR_MC_SCOPE(a)           __IPV6_ADDR_MC_SCOPE(a)
  329 #endif
  330 
  331 /*
  332  * Multicast Scope
  333  */
  334 #define IN6_IS_ADDR_MC_NODELOCAL(a)                                     \
  335         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
  336          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_NODELOCAL))
  337 
  338 #define IN6_IS_ADDR_MC_INTFACELOCAL(a)                                  \
  339         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
  340          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_INTFACELOCAL))
  341 
  342 #define IN6_IS_ADDR_MC_LINKLOCAL(a)                                     \
  343         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
  344          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_LINKLOCAL))
  345 
  346 #define IN6_IS_ADDR_MC_SITELOCAL(a)                                     \
  347         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
  348          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_SITELOCAL))
  349 
  350 #define IN6_IS_ADDR_MC_ORGLOCAL(a)                                      \
  351         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
  352          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_ORGLOCAL))
  353 
  354 #define IN6_IS_ADDR_MC_GLOBAL(a)                                        \
  355         (IN6_IS_ADDR_MULTICAST(a) &&                                    \
  356          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_GLOBAL))
  357 
  358 #ifdef _KERNEL  /* nonstandard */
  359 /*
  360  * KAME Scope
  361  */
  362 #define IN6_IS_SCOPE_LINKLOCAL(a)                                       \
  363         (IN6_IS_ADDR_LINKLOCAL(a) || IN6_IS_ADDR_MC_LINKLOCAL(a))
  364 #define IN6_IS_SCOPE_EMBED(a)                                           \
  365         ((IN6_IS_ADDR_LINKLOCAL(a)) ||                                  \
  366          (IN6_IS_ADDR_MC_LINKLOCAL(a)) ||                               \
  367          (IN6_IS_ADDR_MC_INTFACELOCAL(a)))
  368 
  369 
  370 #define IFA6_IS_DEPRECATED(a)                                           \
  371         ((a)->ia6_lifetime.ia6t_preferred != 0 &&                       \
  372          (a)->ia6_lifetime.ia6t_preferred < time_uptime)
  373 
  374 #define IFA6_IS_INVALID(a)                                              \
  375         ((a)->ia6_lifetime.ia6t_expire != 0 &&                          \
  376          (a)->ia6_lifetime.ia6t_expire < time_uptime)
  377 #endif
  378 
  379 /*
  380  * IP6 route structure
  381  */
  382 #ifndef _XOPEN_SOURCE
  383 struct route_in6 {
  384         struct rtentry          *ro_rt;
  385         struct sockaddr_in6     ro_dst;
  386 };
  387 #endif
  388 
  389 /*
  390  * Options for use with [gs]etsockopt at the IPV6 level.
  391  * First word of comment is data type; bool is stored in int.
  392  */
  393 /* no hdrincl */
  394 #if 0 /* the followings are relic in IPv4 and hence are disabled */
  395 #define IPV6_OPTIONS            1  /* buf/ip6_opts; set/get IP6 options */
  396 #define IPV6_RECVOPTS           5  /* bool; receive all IP6 opts w/dgram */
  397 #define IPV6_RECVRETOPTS        6  /* bool; receive IP6 opts for response */
  398 #define IPV6_RECVDSTADDR        7  /* bool; receive IP6 dst addr w/dgram */
  399 #define IPV6_RETOPTS            8  /* ip6_opts; set/get IP6 options */
  400 #endif
  401 #define IPV6_SOCKOPT_RESERVED1  3  /* reserved for future use */
  402 #define IPV6_UNICAST_HOPS       4  /* int; IP6 hops */
  403 #define IPV6_MULTICAST_IF       9  /* u_int; set/get IP6 multicast i/f  */
  404 #define IPV6_MULTICAST_HOPS     10 /* int; set/get IP6 multicast hops */
  405 #define IPV6_MULTICAST_LOOP     11 /* u_int; set/get IP6 multicast loopback */
  406 #define IPV6_JOIN_GROUP         12 /* ip6_mreq; join a group membership */
  407 #define IPV6_LEAVE_GROUP        13 /* ip6_mreq; leave a group membership */
  408 #define IPV6_PORTRANGE          14 /* int; range to choose for unspec port */
  409 #define ICMP6_FILTER            18 /* icmp6_filter; icmp6 filter */
  410 /* RFC2292 options */
  411 #ifdef _KERNEL
  412 #define IPV6_2292PKTINFO        19 /* bool; send/recv if, src/dst addr */
  413 #define IPV6_2292HOPLIMIT       20 /* bool; hop limit */
  414 #define IPV6_2292NEXTHOP        21 /* bool; next hop addr */
  415 #define IPV6_2292HOPOPTS        22 /* bool; hop-by-hop option */
  416 #define IPV6_2292DSTOPTS        23 /* bool; destinaion option */
  417 #define IPV6_2292RTHDR          24 /* bool; routing header */
  418 #define IPV6_2292PKTOPTIONS     25 /* buf/cmsghdr; set/get IPv6 options */
  419 #endif
  420 
  421 #define IPV6_CHECKSUM           26 /* int; checksum offset for raw socket */
  422 #define IPV6_V6ONLY             27 /* bool; only bind INET6 at wildcard bind */
  423 #ifndef _KERNEL
  424 #define IPV6_BINDV6ONLY         IPV6_V6ONLY
  425 #endif
  426 
  427 #if 1 /* IPSEC */
  428 #define IPV6_IPSEC_POLICY       28 /* struct; get/set security policy */
  429 #endif
  430 #define IPV6_FAITH              29 /* bool; accept FAITH'ed connections */
  431 
  432 #if 1 /* IPV6FIREWALL */
  433 #define IPV6_FW_ADD             30 /* add a firewall rule to chain */
  434 #define IPV6_FW_DEL             31 /* delete a firewall rule from chain */
  435 #define IPV6_FW_FLUSH           32 /* flush firewall rule chain */
  436 #define IPV6_FW_ZERO            33 /* clear single/all firewall counter(s) */
  437 #define IPV6_FW_GET             34 /* get entire firewall rule chain */
  438 #endif
  439 
  440 /* 
  441  * new socket options introduced in RFC3542 
  442  */
  443 #define IPV6_RTHDRDSTOPTS       35 /* ip6_dest; send dst option before rthdr */
  444 #define IPV6_RECVPKTINFO        36 /* bool; recv if, dst addr */
  445 #define IPV6_RECVHOPLIMIT       37 /* bool; recv hop limit */
  446 #define IPV6_RECVRTHDR          38 /* bool; recv routing header */
  447 #define IPV6_RECVHOPOPTS        39 /* bool; recv hop-by-hop option */
  448 #define IPV6_RECVDSTOPTS        40 /* bool; recv dst option after rthdr */
  449 #ifdef _KERNEL
  450 #define IPV6_RECVRTHDRDSTOPTS   41 /* bool; recv dst option before rthdr */
  451 #endif
  452 #define IPV6_USE_MIN_MTU        42 /* bool; send packets at the minimum MTU */
  453 #define IPV6_RECVPATHMTU        43 /* bool; notify an according MTU */
  454 
  455 /* mtuinfo; get the current path MTU (sopt),
  456  * 4 bytes int; MTU notification (cmsg) 
  457  */
  458 #define IPV6_PATHMTU            44 
  459 #if 0 /*obsoleted during 2292bis -> 3542*/
  460 #define IPV6_REACHCONF          45 /* no data; ND reachability confirm
  461                                       (cmsg only/not in of RFC3542) */
  462 #endif
  463 #define IPV6_PKTINFO            46 /* in6_pktinfo; send if, src addr */
  464 #define IPV6_HOPLIMIT           47 /* int; send hop limit */
  465 #define IPV6_NEXTHOP            48 /* sockaddr; next hop addr */
  466 #define IPV6_HOPOPTS            49 /* ip6_hbh; send hop-by-hop option */
  467 #define IPV6_DSTOPTS            50 /* ip6_dest; send dst option befor rthdr */
  468 #define IPV6_RTHDR              51 /* ip6_rthdr; send routing header */
  469 #define IPV6_PKTOPTIONS         52 /* buf/cmsghdr; set/get IPv6 options, this is obsoleted by RFC3542 */
  470 
  471 #define IPV6_RECVTCLASS         57 /* bool; recv traffic class values */
  472 
  473 #define IPV6_AUTOFLOWLABEL      59 /* bool; attach flowlabel automagically */
  474 
  475 #define IPV6_TCLASS             61 /* int; send traffic class value */
  476 #define IPV6_DONTFRAG           62 /* bool; disable IPv6 fragmentation */
  477 
  478 #define IPV6_PREFER_TEMPADDR    63 /* int; prefer temporary addresses as
  479                                     * the source address.
  480                                     */
  481 /*
  482  * The following option is private; do not use it from user applications.
  483  * It is deliberately defined to the same value as IP_MSFILTER.
  484  */
  485 #define IPV6_MSFILTER           74 /* struct __msfilterreq;
  486                                     * set/get multicast source filter list.
  487                                     */ 
  488 /* to define items, should talk with KAME guys first, for *BSD compatibility */
  489 
  490 #define IPV6_RTHDR_LOOSE     0 /* this hop need not be a neighbor. XXX old spec */
  491 #define IPV6_RTHDR_STRICT    1 /* this hop must be a neighbor. XXX old spec */
  492 #define IPV6_RTHDR_TYPE_0    0 /* IPv6 routing header type 0 */
  493 
  494 /*
  495  * Defaults and limits for options
  496  */
  497 #define IPV6_DEFAULT_MULTICAST_HOPS 1   /* normally limit m'casts to 1 hop */
  498 #define IPV6_DEFAULT_MULTICAST_LOOP 1   /* normally hear sends if a member */
  499 
  500 /*
  501  * Argument structure for IPV6_JOIN_GROUP and IPV6_LEAVE_GROUP.
  502  */
  503 struct ipv6_mreq {
  504         struct in6_addr ipv6mr_multiaddr;
  505         unsigned int    ipv6mr_interface;
  506 };
  507 
  508 /*
  509  * IPV6_PKTINFO: Packet information(RFC2292 sec 5)
  510  */
  511 struct in6_pktinfo {
  512         struct in6_addr ipi6_addr;      /* src/dst IPv6 address */
  513         unsigned int    ipi6_ifindex;   /* send/recv interface index */
  514 };
  515 
  516 /*
  517  * New Control structure for IPV6_RECVPATHMTU socket option introduced in RFC3542.
  518  */
  519 struct ip6_mtuinfo {
  520         struct sockaddr_in6 ip6m_addr;  /* or sockaddr_storage? */
  521         uint32_t ip6m_mtu;
  522 };
  523 
  524 /*
  525  * Argument for IPV6_PORTRANGE:
  526  * - which range to search when port is unspecified at bind() or connect()
  527  */
  528 #define IPV6_PORTRANGE_DEFAULT  0       /* default range */
  529 #define IPV6_PORTRANGE_HIGH     1       /* "high" - request firewall bypass */
  530 #define IPV6_PORTRANGE_LOW      2       /* "low" - vouchsafe security */
  531 
  532 #ifndef _XOPEN_SOURCE
  533 /*
  534  * Definitions for inet6 sysctl operations.
  535  *
  536  * Third level is protocol number.
  537  * Fourth level is desired variable within that protocol.
  538  */
  539 #define IPV6PROTO_MAXID (IPPROTO_PIM + 1)       /* don't list to IPV6PROTO_MAX */
  540 
  541 #define CTL_IPV6PROTO_NAMES {                                   \
  542         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
  543         { 0, 0 },                                               \
  544         { "tcp6", CTLTYPE_NODE },                               \
  545         { 0, 0 },                                               \
  546         { 0, 0 },                                               \
  547         { 0, 0 },                                               \
  548         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
  549         { 0, 0 },                                               \
  550         { 0, 0 },                                               \
  551         { "udp6", CTLTYPE_NODE },                               \
  552         { 0, 0 },                                               \
  553         { 0, 0 },                                               \
  554         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
  555         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
  556         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
  557         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
  558         { 0, 0 },                                               \
  559         { "ip6", CTLTYPE_NODE },                                \
  560         { 0, 0 },                                               \
  561         { 0, 0 },                                               \
  562         { 0, 0 },                                               \
  563         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
  564         { 0, 0 },                                               \
  565         { "ipsec6", CTLTYPE_NODE },                             \
  566         { 0, 0 },                                               \
  567         { 0, 0 },                                               \
  568         { 0, 0 },                                               \
  569         { 0, 0 },                                               \
  570         { 0, 0 },                                               \
  571         { 0, 0 },                                               \
  572         { "icmp6", CTLTYPE_NODE },                              \
  573         { 0, 0 },                                               \
  574         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
  575         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
  576         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
  577         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
  578         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
  579         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
  580         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
  581         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },       \
  582         { 0, 0 },                                               \
  583         { 0, 0 },                                               \
  584         { 0, 0 },                                               \
  585         { "pim6", CTLTYPE_NODE },                               \
  586 }
  587 
  588 /*
  589  * Names for IP sysctl objects
  590  */
  591 #define IPV6CTL_FORWARDING      1       /* act as router */
  592 #define IPV6CTL_SENDREDIRECTS   2       /* may send redirects when forwarding*/
  593 #define IPV6CTL_DEFHLIM         3       /* default Hop-Limit */
  594 #ifdef notyet
  595 #define IPV6CTL_DEFMTU          4       /* default MTU */
  596 #endif
  597 #define IPV6CTL_FORWSRCRT       5       /* forward source-routed dgrams */
  598 #define IPV6CTL_STATS           6       /* stats */
  599 #define IPV6CTL_MRTSTATS        7       /* multicast forwarding stats */
  600 #define IPV6CTL_MRTPROTO        8       /* multicast routing protocol */
  601 #define IPV6CTL_MAXFRAGPACKETS  9       /* max packets reassembly queue */
  602 #define IPV6CTL_SOURCECHECK     10      /* verify source route and intf */
  603 #define IPV6CTL_SOURCECHECK_LOGINT 11   /* minimume logging interval */
  604 #define IPV6CTL_ACCEPT_RTADV    12
  605 #define IPV6CTL_KEEPFAITH       13
  606 #define IPV6CTL_LOG_INTERVAL    14
  607 #define IPV6CTL_HDRNESTLIMIT    15
  608 #define IPV6CTL_DAD_COUNT       16
  609 #define IPV6CTL_AUTO_FLOWLABEL  17
  610 #define IPV6CTL_DEFMCASTHLIM    18
  611 #define IPV6CTL_GIF_HLIM        19      /* default HLIM for gif encap packet */
  612 #define IPV6CTL_KAME_VERSION    20
  613 #define IPV6CTL_USE_DEPRECATED  21      /* use deprecated addr (RFC2462 5.5.4) */
  614 #define IPV6CTL_RR_PRUNE        22      /* walk timer for router renumbering */
  615 #if 0   /* obsolete */
  616 #define IPV6CTL_MAPPED_ADDR     23
  617 #endif
  618 #define IPV6CTL_V6ONLY          24
  619 #define IPV6CTL_RTEXPIRE        25      /* cloned route expiration time */
  620 #define IPV6CTL_RTMINEXPIRE     26      /* min value for expiration time */
  621 #define IPV6CTL_RTMAXCACHE      27      /* trigger level for dynamic expire */
  622 
  623 #define IPV6CTL_USETEMPADDR     32      /* use temporary addresses (RFC3041) */
  624 #define IPV6CTL_TEMPPLTIME      33      /* preferred lifetime for tmpaddrs */
  625 #define IPV6CTL_TEMPVLTIME      34      /* valid lifetime for tmpaddrs */
  626 #define IPV6CTL_AUTO_LINKLOCAL  35      /* automatic link-local addr assign */
  627 #define IPV6CTL_RIP6STATS       36      /* raw_ip6 stats */
  628 
  629 #define IPV6CTL_ADDRCTLPOLICY   38      /* get/set address selection policy */
  630 
  631 /* New entries should be added here from current IPV6CTL_MAXID value. */
  632 /* to define items, should talk with KAME guys first, for *BSD compatibility */
  633 #define IPV6CTL_MAXID           42
  634 
  635 #endif /* !_XOPEN_SOURCE */
  636 
  637 /*
  638  * Redefinition of mbuf flags
  639  */
  640 #define M_AUTHIPHDR     M_PROTO2
  641 #define M_DECRYPTED     M_PROTO3
  642 #define M_LOOP          M_PROTO4
  643 #define M_AUTHIPDGM     M_PROTO5
  644 
  645 #ifdef _KERNEL
  646 
  647 struct ifnet;
  648 struct mbuf;
  649 struct sockaddr;
  650 struct sockaddr_in;
  651 struct sockaddr_in6;
  652 
  653 int     in6_cksum (struct mbuf *, uint8_t, uint32_t, uint32_t);
  654 int     in6_localaddr (struct in6_addr *);
  655 int     in6_addrscope (struct in6_addr *);
  656 struct  in6_ifaddr *in6_ifawithscope (struct ifnet *, struct in6_addr *);
  657 struct  in6_ifaddr *in6_ifawithifp (struct ifnet *, struct in6_addr *);
  658 void    in6_if_up (struct ifnet *);
  659 
  660 void    in6_sin6_2_sin (struct sockaddr_in *sin, struct sockaddr_in6 *sin6);
  661 void    in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6);
  662 void    in6_sin6_2_sin_in_sock (struct sockaddr *nam);
  663 void    in6_sin_2_v4mapsin6_in_sock (struct sockaddr **nam);
  664 void    addrsel_policy_init (void);
  665 
  666 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
  667 #define sin6tosa(sin6)  ((struct sockaddr *)(sin6))
  668 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
  669 
  670 extern int (*faithprefix_p)(struct in6_addr *);
  671 #endif /* _KERNEL */
  672 
  673 #include <sys/cdefs.h>          /* for __BEGIN_DECLS and __END_DECLS */
  674 
  675 __BEGIN_DECLS
  676 struct cmsghdr;
  677 
  678 uint8_t *inet6_option_alloc (struct cmsghdr *, int, int, int);
  679 int inet6_option_append (struct cmsghdr *, const uint8_t *, int, int);
  680 int inet6_option_find (const struct cmsghdr *, uint8_t **, int);
  681 int inet6_option_init (void *, struct cmsghdr **, int);
  682 int inet6_option_next (const struct cmsghdr *, uint8_t **);
  683 int inet6_option_space (int);
  684 
  685 int inet6_opt_append (void *, socklen_t, int, uint8_t, socklen_t, uint8_t, void **);
  686 int inet6_opt_find (void *, socklen_t, int, uint8_t, socklen_t *, void **);
  687 int inet6_opt_finish (void *, socklen_t, int);
  688 int inet6_opt_get_val (void *, int, void *, socklen_t);
  689 int inet6_opt_init (void *, socklen_t);
  690 int inet6_opt_next (void *, socklen_t, int, uint8_t *, socklen_t *, void **);
  691 int inet6_opt_set_val (void *, int, void *, socklen_t);
  692 
  693 int              inet6_rth_add (void *, const struct in6_addr *);
  694 struct in6_addr *inet6_rth_getaddr (const void *, int);
  695 void            *inet6_rth_init (void *, socklen_t, int, int);
  696 int              inet6_rth_reverse (const void *, void *);
  697 int              inet6_rth_segments (const void *);
  698 socklen_t        inet6_rth_space (int, int);
  699 
  700 int              inet6_rthdr_add (struct cmsghdr *, const struct in6_addr *,
  701                                   unsigned int);
  702 struct in6_addr *inet6_rthdr_getaddr (struct cmsghdr *, int);
  703 int              inet6_rthdr_getflags (const struct cmsghdr *, int);
  704 struct cmsghdr  *inet6_rthdr_init (void *, int);
  705 int              inet6_rthdr_lasthop (struct cmsghdr *, unsigned int);
  706 #if 0                                   /* not implemented yet */
  707 int              inet6_rthdr_reverse (const struct cmsghdr *, struct cmsghdr *);
  708 #endif
  709 int              inet6_rthdr_segments (const struct cmsghdr *);
  710 size_t           inet6_rthdr_space (int, int);
  711 __END_DECLS
  712 
  713 #endif /* !_NETINET6_IN6_H_ */

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