The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: 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 /*-
    2  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. Neither the name of the project nor the names of its contributors
   14  *    may be used to endorse or promote products derived from this software
   15  *    without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  *      $KAME: in6.h,v 1.89 2001/05/27 13:28:35 itojun Exp $
   30  */
   31 
   32 /*-
   33  * Copyright (c) 1982, 1986, 1990, 1993
   34  *      The Regents of the University of California.  All rights reserved.
   35  *
   36  * Redistribution and use in source and binary forms, with or without
   37  * modification, are permitted provided that the following conditions
   38  * are met:
   39  * 1. Redistributions of source code must retain the above copyright
   40  *    notice, this list of conditions and the following disclaimer.
   41  * 2. Redistributions in binary form must reproduce the above copyright
   42  *    notice, this list of conditions and the following disclaimer in the
   43  *    documentation and/or other materials provided with the distribution.
   44  * 4. Neither the name of the University nor the names of its contributors
   45  *    may be used to endorse or promote products derived from this software
   46  *    without specific prior written permission.
   47  *
   48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   58  * SUCH DAMAGE.
   59  *
   60  *      @(#)in.h        8.3 (Berkeley) 1/3/94
   61  * $FreeBSD: stable/8/sys/netinet6/in6.h 218992 2011-02-24 10:23:22Z brucec $
   62  */
   63 
   64 #ifndef __KAME_NETINET_IN_H_INCLUDED_
   65 #error "do not include netinet6/in6.h directly, include netinet/in.h.  see RFC2553"
   66 #endif
   67 
   68 #ifndef _NETINET6_IN6_H_
   69 #define _NETINET6_IN6_H_
   70 
   71 /*
   72  * Identification of the network protocol stack
   73  * for *BSD-current/release: http://www.kame.net/dev/cvsweb.cgi/kame/COVERAGE
   74  * has the table of implementation/integration differences.
   75  */
   76 #define __KAME__
   77 #define __KAME_VERSION          "FreeBSD"
   78 
   79 /*
   80  * IPv6 port allocation rules should mirror the IPv4 rules and are controlled
   81  * by the net.inet.ip.portrange sysctl tree. The following defines exist
   82  * for compatibility with userland applications that need them.
   83  */
   84 #if __BSD_VISIBLE
   85 #define IPV6PORT_RESERVED       1024
   86 #define IPV6PORT_ANONMIN        49152
   87 #define IPV6PORT_ANONMAX        65535
   88 #define IPV6PORT_RESERVEDMIN    600
   89 #define IPV6PORT_RESERVEDMAX    (IPV6PORT_RESERVED-1)
   90 #endif
   91 
   92 /*
   93  * IPv6 address
   94  */
   95 struct in6_addr {
   96         union {
   97                 uint8_t         __u6_addr8[16];
   98                 uint16_t        __u6_addr16[8];
   99                 uint32_t        __u6_addr32[4];
  100         } __u6_addr;                    /* 128-bit IP6 address */
  101 };
  102 
  103 #define s6_addr   __u6_addr.__u6_addr8
  104 #ifdef _KERNEL  /* XXX nonstandard */
  105 #define s6_addr8  __u6_addr.__u6_addr8
  106 #define s6_addr16 __u6_addr.__u6_addr16
  107 #define s6_addr32 __u6_addr.__u6_addr32
  108 #endif
  109 
  110 #define INET6_ADDRSTRLEN        46
  111 
  112 /*
  113  * XXX missing POSIX.1-2001 macro IPPROTO_IPV6.
  114  */
  115 
  116 /*
  117  * Socket address for IPv6
  118  */
  119 #if __BSD_VISIBLE
  120 #define SIN6_LEN
  121 #endif
  122 
  123 struct sockaddr_in6 {
  124         uint8_t         sin6_len;       /* length of this struct */
  125         sa_family_t     sin6_family;    /* AF_INET6 */
  126         in_port_t       sin6_port;      /* Transport layer port # */
  127         uint32_t        sin6_flowinfo;  /* IP6 flow information */
  128         struct in6_addr sin6_addr;      /* IP6 address */
  129         uint32_t        sin6_scope_id;  /* scope zone index */
  130 };
  131 
  132 /*
  133  * Local definition for masks
  134  */
  135 #ifdef _KERNEL  /* XXX nonstandard */
  136 #define IN6MASK0        {{{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }}}
  137 #define IN6MASK32       {{{ 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, \
  138                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
  139 #define IN6MASK64       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
  140                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
  141 #define IN6MASK96       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
  142                             0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00 }}}
  143 #define IN6MASK128      {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
  144                             0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}}
  145 #endif
  146 
  147 #ifdef _KERNEL
  148 extern const struct sockaddr_in6 sa6_any;
  149 
  150 extern const struct in6_addr in6mask0;
  151 extern const struct in6_addr in6mask32;
  152 extern const struct in6_addr in6mask64;
  153 extern const struct in6_addr in6mask96;
  154 extern const struct in6_addr in6mask128;
  155 #endif /* _KERNEL */
  156 
  157 /*
  158  * Macros started with IPV6_ADDR is KAME local
  159  */
  160 #ifdef _KERNEL  /* XXX nonstandard */
  161 #if _BYTE_ORDER == _BIG_ENDIAN
  162 #define IPV6_ADDR_INT32_ONE     1
  163 #define IPV6_ADDR_INT32_TWO     2
  164 #define IPV6_ADDR_INT32_MNL     0xff010000
  165 #define IPV6_ADDR_INT32_MLL     0xff020000
  166 #define IPV6_ADDR_INT32_SMP     0x0000ffff
  167 #define IPV6_ADDR_INT16_ULL     0xfe80
  168 #define IPV6_ADDR_INT16_USL     0xfec0
  169 #define IPV6_ADDR_INT16_MLL     0xff02
  170 #elif _BYTE_ORDER == _LITTLE_ENDIAN
  171 #define IPV6_ADDR_INT32_ONE     0x01000000
  172 #define IPV6_ADDR_INT32_TWO     0x02000000
  173 #define IPV6_ADDR_INT32_MNL     0x000001ff
  174 #define IPV6_ADDR_INT32_MLL     0x000002ff
  175 #define IPV6_ADDR_INT32_SMP     0xffff0000
  176 #define IPV6_ADDR_INT16_ULL     0x80fe
  177 #define IPV6_ADDR_INT16_USL     0xc0fe
  178 #define IPV6_ADDR_INT16_MLL     0x02ff
  179 #endif
  180 #endif
  181 
  182 /*
  183  * Definition of some useful macros to handle IP6 addresses
  184  */
  185 #if __BSD_VISIBLE
  186 #define IN6ADDR_ANY_INIT \
  187         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  188             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
  189 #define IN6ADDR_LOOPBACK_INIT \
  190         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  191             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
  192 #define IN6ADDR_NODELOCAL_ALLNODES_INIT \
  193         {{{ 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  194             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
  195 #define IN6ADDR_INTFACELOCAL_ALLNODES_INIT \
  196         {{{ 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  197             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
  198 #define IN6ADDR_LINKLOCAL_ALLNODES_INIT \
  199         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  200             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
  201 #define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \
  202         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  203             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}}
  204 #define IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT \
  205         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  206             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x16 }}}
  207 #endif
  208 
  209 extern const struct in6_addr in6addr_any;
  210 extern const struct in6_addr in6addr_loopback;
  211 #if __BSD_VISIBLE
  212 extern const struct in6_addr in6addr_nodelocal_allnodes;
  213 extern const struct in6_addr in6addr_linklocal_allnodes;
  214 extern const struct in6_addr in6addr_linklocal_allrouters;
  215 extern const struct in6_addr in6addr_linklocal_allv2routers;
  216 #endif
  217 
  218 /*
  219  * Equality
  220  * NOTE: Some of kernel programming environment (for example, openbsd/sparc)
  221  * does not supply memcmp().  For userland memcmp() is preferred as it is
  222  * in ANSI standard.
  223  */
  224 #ifdef _KERNEL
  225 #define IN6_ARE_ADDR_EQUAL(a, b)                        \
  226     (bcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
  227 #else
  228 #if __BSD_VISIBLE
  229 #define IN6_ARE_ADDR_EQUAL(a, b)                        \
  230     (memcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
  231 #endif
  232 #endif
  233 
  234 /*
  235  * Unspecified
  236  */
  237 #define IN6_IS_ADDR_UNSPECIFIED(a)      \
  238         ((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
  239          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
  240          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == 0) && \
  241          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) == 0))
  242 
  243 /*
  244  * Loopback
  245  */
  246 #define IN6_IS_ADDR_LOOPBACK(a)         \
  247         ((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
  248          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
  249          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == 0) && \
  250          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) == ntohl(1)))
  251 
  252 /*
  253  * IPv4 compatible
  254  */
  255 #define IN6_IS_ADDR_V4COMPAT(a)         \
  256         ((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
  257          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
  258          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == 0) && \
  259          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) != 0) &&        \
  260          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) != ntohl(1)))
  261 
  262 /*
  263  * Mapped
  264  */
  265 #define IN6_IS_ADDR_V4MAPPED(a)               \
  266         ((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
  267          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
  268          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == ntohl(0x0000ffff)))
  269 
  270 /*
  271  * KAME Scope Values
  272  */
  273 
  274 #ifdef _KERNEL  /* XXX nonstandard */
  275 #define IPV6_ADDR_SCOPE_NODELOCAL       0x01
  276 #define IPV6_ADDR_SCOPE_INTFACELOCAL    0x01
  277 #define IPV6_ADDR_SCOPE_LINKLOCAL       0x02
  278 #define IPV6_ADDR_SCOPE_SITELOCAL       0x05
  279 #define IPV6_ADDR_SCOPE_ORGLOCAL        0x08    /* just used in this file */
  280 #define IPV6_ADDR_SCOPE_GLOBAL          0x0e
  281 #else
  282 #define __IPV6_ADDR_SCOPE_NODELOCAL     0x01
  283 #define __IPV6_ADDR_SCOPE_INTFACELOCAL  0x01
  284 #define __IPV6_ADDR_SCOPE_LINKLOCAL     0x02
  285 #define __IPV6_ADDR_SCOPE_SITELOCAL     0x05
  286 #define __IPV6_ADDR_SCOPE_ORGLOCAL      0x08    /* just used in this file */
  287 #define __IPV6_ADDR_SCOPE_GLOBAL        0x0e
  288 #endif
  289 
  290 /*
  291  * Unicast Scope
  292  * Note that we must check topmost 10 bits only, not 16 bits (see RFC2373).
  293  */
  294 #define IN6_IS_ADDR_LINKLOCAL(a)        \
  295         (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0x80))
  296 #define IN6_IS_ADDR_SITELOCAL(a)        \
  297         (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0xc0))
  298 
  299 /*
  300  * Multicast
  301  */
  302 #define IN6_IS_ADDR_MULTICAST(a)        ((a)->s6_addr[0] == 0xff)
  303 
  304 #ifdef _KERNEL  /* XXX nonstandard */
  305 #define IPV6_ADDR_MC_SCOPE(a)           ((a)->s6_addr[1] & 0x0f)
  306 #else
  307 #define __IPV6_ADDR_MC_SCOPE(a)         ((a)->s6_addr[1] & 0x0f)
  308 #endif
  309 
  310 /*
  311  * Multicast Scope
  312  */
  313 #ifdef _KERNEL  /* refers nonstandard items */
  314 #define IN6_IS_ADDR_MC_NODELOCAL(a)     \
  315         (IN6_IS_ADDR_MULTICAST(a) &&    \
  316          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_NODELOCAL))
  317 #define IN6_IS_ADDR_MC_INTFACELOCAL(a)  \
  318         (IN6_IS_ADDR_MULTICAST(a) &&    \
  319          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_INTFACELOCAL))
  320 #define IN6_IS_ADDR_MC_LINKLOCAL(a)     \
  321         (IN6_IS_ADDR_MULTICAST(a) &&    \
  322          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_LINKLOCAL))
  323 #define IN6_IS_ADDR_MC_SITELOCAL(a)     \
  324         (IN6_IS_ADDR_MULTICAST(a) &&    \
  325          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_SITELOCAL))
  326 #define IN6_IS_ADDR_MC_ORGLOCAL(a)      \
  327         (IN6_IS_ADDR_MULTICAST(a) &&    \
  328          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_ORGLOCAL))
  329 #define IN6_IS_ADDR_MC_GLOBAL(a)        \
  330         (IN6_IS_ADDR_MULTICAST(a) &&    \
  331          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_GLOBAL))
  332 #else
  333 #define IN6_IS_ADDR_MC_NODELOCAL(a)     \
  334         (IN6_IS_ADDR_MULTICAST(a) &&    \
  335          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_NODELOCAL))
  336 #define IN6_IS_ADDR_MC_LINKLOCAL(a)     \
  337         (IN6_IS_ADDR_MULTICAST(a) &&    \
  338          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_LINKLOCAL))
  339 #define IN6_IS_ADDR_MC_SITELOCAL(a)     \
  340         (IN6_IS_ADDR_MULTICAST(a) &&    \
  341          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_SITELOCAL))
  342 #define IN6_IS_ADDR_MC_ORGLOCAL(a)      \
  343         (IN6_IS_ADDR_MULTICAST(a) &&    \
  344          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_ORGLOCAL))
  345 #define IN6_IS_ADDR_MC_GLOBAL(a)        \
  346         (IN6_IS_ADDR_MULTICAST(a) &&    \
  347          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_GLOBAL))
  348 #endif
  349 
  350 #ifdef _KERNEL  /* nonstandard */
  351 /*
  352  * KAME Scope
  353  */
  354 #define IN6_IS_SCOPE_LINKLOCAL(a)       \
  355         ((IN6_IS_ADDR_LINKLOCAL(a)) ||  \
  356          (IN6_IS_ADDR_MC_LINKLOCAL(a)))
  357 #define IN6_IS_SCOPE_EMBED(a)                   \
  358         ((IN6_IS_ADDR_LINKLOCAL(a)) ||          \
  359          (IN6_IS_ADDR_MC_LINKLOCAL(a)) ||       \
  360          (IN6_IS_ADDR_MC_INTFACELOCAL(a)))
  361 
  362 #define IFA6_IS_DEPRECATED(a) \
  363         ((a)->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME && \
  364          (u_int32_t)((time_second - (a)->ia6_updatetime)) > \
  365          (a)->ia6_lifetime.ia6t_pltime)
  366 #define IFA6_IS_INVALID(a) \
  367         ((a)->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME && \
  368          (u_int32_t)((time_second - (a)->ia6_updatetime)) > \
  369          (a)->ia6_lifetime.ia6t_vltime)
  370 #endif /* _KERNEL */
  371 
  372 /*
  373  * IP6 route structure
  374  */
  375 #if __BSD_VISIBLE
  376 struct route_in6 {
  377         struct  rtentry *ro_rt;
  378         struct  llentry *ro_lle;
  379         struct  sockaddr_in6 ro_dst;
  380 };
  381 #endif
  382 
  383 /*
  384  * Options for use with [gs]etsockopt at the IPV6 level.
  385  * First word of comment is data type; bool is stored in int.
  386  */
  387 /* no hdrincl */
  388 #if 0 /* the followings are relic in IPv4 and hence are disabled */
  389 #define IPV6_OPTIONS            1  /* buf/ip6_opts; set/get IP6 options */
  390 #define IPV6_RECVOPTS           5  /* bool; receive all IP6 opts w/dgram */
  391 #define IPV6_RECVRETOPTS        6  /* bool; receive IP6 opts for response */
  392 #define IPV6_RECVDSTADDR        7  /* bool; receive IP6 dst addr w/dgram */
  393 #define IPV6_RETOPTS            8  /* ip6_opts; set/get IP6 options */
  394 #endif
  395 #define IPV6_SOCKOPT_RESERVED1  3  /* reserved for future use */
  396 #define IPV6_UNICAST_HOPS       4  /* int; IP6 hops */
  397 #define IPV6_MULTICAST_IF       9  /* u_int; set/get IP6 multicast i/f  */
  398 #define IPV6_MULTICAST_HOPS     10 /* int; set/get IP6 multicast hops */
  399 #define IPV6_MULTICAST_LOOP     11 /* u_int; set/get IP6 multicast loopback */
  400 #define IPV6_JOIN_GROUP         12 /* ip6_mreq; join a group membership */
  401 #define IPV6_LEAVE_GROUP        13 /* ip6_mreq; leave a group membership */
  402 #define IPV6_PORTRANGE          14 /* int; range to choose for unspec port */
  403 #define ICMP6_FILTER            18 /* icmp6_filter; icmp6 filter */
  404 /* RFC2292 options */
  405 #ifdef _KERNEL
  406 #define IPV6_2292PKTINFO        19 /* bool; send/recv if, src/dst addr */
  407 #define IPV6_2292HOPLIMIT       20 /* bool; hop limit */
  408 #define IPV6_2292NEXTHOP        21 /* bool; next hop addr */
  409 #define IPV6_2292HOPOPTS        22 /* bool; hop-by-hop option */
  410 #define IPV6_2292DSTOPTS        23 /* bool; destinaion option */
  411 #define IPV6_2292RTHDR          24 /* bool; routing header */
  412 #define IPV6_2292PKTOPTIONS     25 /* buf/cmsghdr; set/get IPv6 options */
  413 #endif
  414 
  415 #define IPV6_CHECKSUM           26 /* int; checksum offset for raw socket */
  416 #define IPV6_V6ONLY             27 /* bool; make AF_INET6 sockets v6 only */
  417 #ifndef _KERNEL
  418 #define IPV6_BINDV6ONLY         IPV6_V6ONLY
  419 #endif
  420 
  421 #if 1 /* IPSEC */
  422 #define IPV6_IPSEC_POLICY       28 /* struct; get/set security policy */
  423 #endif /* IPSEC */
  424 
  425 #define IPV6_FAITH              29 /* bool; accept FAITH'ed connections */
  426 
  427 #if 1 /* IPV6FIREWALL */
  428 #define IPV6_FW_ADD             30 /* add a firewall rule to chain */
  429 #define IPV6_FW_DEL             31 /* delete a firewall rule from chain */
  430 #define IPV6_FW_FLUSH           32 /* flush firewall rule chain */
  431 #define IPV6_FW_ZERO            33 /* clear single/all firewall counter(s) */
  432 #define IPV6_FW_GET             34 /* get entire firewall rule chain */
  433 #endif
  434 
  435 /* new socket options introduced in RFC3542 */
  436 #define IPV6_RTHDRDSTOPTS       35 /* ip6_dest; send dst option before rthdr */
  437 
  438 #define IPV6_RECVPKTINFO        36 /* bool; recv if, dst addr */
  439 #define IPV6_RECVHOPLIMIT       37 /* bool; recv hop limit */
  440 #define IPV6_RECVRTHDR          38 /* bool; recv routing header */
  441 #define IPV6_RECVHOPOPTS        39 /* bool; recv hop-by-hop option */
  442 #define IPV6_RECVDSTOPTS        40 /* bool; recv dst option after rthdr */
  443 #ifdef _KERNEL
  444 #define IPV6_RECVRTHDRDSTOPTS   41 /* bool; recv dst option before rthdr */
  445 #endif
  446 
  447 #define IPV6_USE_MIN_MTU        42 /* bool; send packets at the minimum MTU */
  448 #define IPV6_RECVPATHMTU        43 /* bool; notify an according MTU */
  449 
  450 #define IPV6_PATHMTU            44 /* mtuinfo; get the current path MTU (sopt),
  451                                       4 bytes int; MTU notification (cmsg) */
  452 #if 0 /*obsoleted during 2292bis -> 3542*/
  453 #define IPV6_REACHCONF          45 /* no data; ND reachability confirm
  454                                       (cmsg only/not in of RFC3542) */
  455 #endif
  456 
  457 /* more new socket options introduced in RFC3542 */
  458 #define IPV6_PKTINFO            46 /* in6_pktinfo; send if, src addr */
  459 #define IPV6_HOPLIMIT           47 /* int; send hop limit */
  460 #define IPV6_NEXTHOP            48 /* sockaddr; next hop addr */
  461 #define IPV6_HOPOPTS            49 /* ip6_hbh; send hop-by-hop option */
  462 #define IPV6_DSTOPTS            50 /* ip6_dest; send dst option befor rthdr */
  463 #define IPV6_RTHDR              51 /* ip6_rthdr; send routing header */
  464 #if 0
  465 #define IPV6_PKTOPTIONS         52 /* buf/cmsghdr; set/get IPv6 options */
  466                                    /* obsoleted by RFC3542 */
  467 #endif
  468 
  469 #define IPV6_RECVTCLASS         57 /* bool; recv traffic class values */
  470 
  471 #define IPV6_AUTOFLOWLABEL      59 /* bool; attach flowlabel automagically */
  472 
  473 #define IPV6_TCLASS             61 /* int; send traffic class value */
  474 #define IPV6_DONTFRAG           62 /* bool; disable IPv6 fragmentation */
  475 
  476 #define IPV6_PREFER_TEMPADDR    63 /* int; prefer temporary addresses as
  477                                     * the source address.
  478                                     */
  479 
  480 #define IPV6_BINDANY            64 /* bool: allow bind to any address */
  481 
  482 /*
  483  * The following option is private; do not use it from user applications.
  484  * It is deliberately defined to the same value as IP_MSFILTER.
  485  */
  486 #define IPV6_MSFILTER           74 /* struct __msfilterreq;
  487                                     * set/get multicast source filter list.
  488                                     */
  489 
  490 /* to define items, should talk with KAME guys first, for *BSD compatibility */
  491 
  492 #define IPV6_RTHDR_LOOSE     0 /* this hop need not be a neighbor. XXX old spec */
  493 #define IPV6_RTHDR_STRICT    1 /* this hop must be a neighbor. XXX old spec */
  494 #define IPV6_RTHDR_TYPE_0    0 /* IPv6 routing header type 0 */
  495 
  496 /*
  497  * Defaults and limits for options
  498  */
  499 #define IPV6_DEFAULT_MULTICAST_HOPS 1   /* normally limit m'casts to 1 hop */
  500 #define IPV6_DEFAULT_MULTICAST_LOOP 1   /* normally hear sends if a member */
  501 
  502 /*
  503  * The im6o_membership vector for each socket is now dynamically allocated at
  504  * run-time, bounded by USHRT_MAX, and is reallocated when needed, sized
  505  * according to a power-of-two increment.
  506  */
  507 #define IPV6_MIN_MEMBERSHIPS    31
  508 #define IPV6_MAX_MEMBERSHIPS    4095
  509 
  510 /*
  511  * Default resource limits for IPv6 multicast source filtering.
  512  * These may be modified by sysctl.
  513  */
  514 #define IPV6_MAX_GROUP_SRC_FILTER       512     /* sources per group */
  515 #define IPV6_MAX_SOCK_SRC_FILTER        128     /* sources per socket/group */
  516 
  517 /*
  518  * Argument structure for IPV6_JOIN_GROUP and IPV6_LEAVE_GROUP.
  519  */
  520 struct ipv6_mreq {
  521         struct in6_addr ipv6mr_multiaddr;
  522         unsigned int    ipv6mr_interface;
  523 };
  524 
  525 /*
  526  * IPV6_PKTINFO: Packet information(RFC2292 sec 5)
  527  */
  528 struct in6_pktinfo {
  529         struct in6_addr ipi6_addr;      /* src/dst IPv6 address */
  530         unsigned int    ipi6_ifindex;   /* send/recv interface index */
  531 };
  532 
  533 /*
  534  * Control structure for IPV6_RECVPATHMTU socket option.
  535  */
  536 struct ip6_mtuinfo {
  537         struct sockaddr_in6 ip6m_addr;  /* or sockaddr_storage? */
  538         uint32_t ip6m_mtu;
  539 };
  540 
  541 /*
  542  * Argument for IPV6_PORTRANGE:
  543  * - which range to search when port is unspecified at bind() or connect()
  544  */
  545 #define IPV6_PORTRANGE_DEFAULT  0       /* default range */
  546 #define IPV6_PORTRANGE_HIGH     1       /* "high" - request firewall bypass */
  547 #define IPV6_PORTRANGE_LOW      2       /* "low" - vouchsafe security */
  548 
  549 #if __BSD_VISIBLE
  550 /*
  551  * Definitions for inet6 sysctl operations.
  552  *
  553  * Third level is protocol number.
  554  * Fourth level is desired variable within that protocol.
  555  */
  556 #define IPV6PROTO_MAXID (IPPROTO_PIM + 1)       /* don't list to IPV6PROTO_MAX */
  557 
  558 /*
  559  * Names for IP sysctl objects
  560  */
  561 #define IPV6CTL_FORWARDING      1       /* act as router */
  562 #define IPV6CTL_SENDREDIRECTS   2       /* may send redirects when forwarding*/
  563 #define IPV6CTL_DEFHLIM         3       /* default Hop-Limit */
  564 #ifdef notyet
  565 #define IPV6CTL_DEFMTU          4       /* default MTU */
  566 #endif
  567 #define IPV6CTL_FORWSRCRT       5       /* forward source-routed dgrams */
  568 #define IPV6CTL_STATS           6       /* stats */
  569 #define IPV6CTL_MRTSTATS        7       /* multicast forwarding stats */
  570 #define IPV6CTL_MRTPROTO        8       /* multicast routing protocol */
  571 #define IPV6CTL_MAXFRAGPACKETS  9       /* max packets reassembly queue */
  572 #define IPV6CTL_SOURCECHECK     10      /* verify source route and intf */
  573 #define IPV6CTL_SOURCECHECK_LOGINT 11   /* minimume logging interval */
  574 #define IPV6CTL_ACCEPT_RTADV    12
  575 #define IPV6CTL_KEEPFAITH       13
  576 #define IPV6CTL_LOG_INTERVAL    14
  577 #define IPV6CTL_HDRNESTLIMIT    15
  578 #define IPV6CTL_DAD_COUNT       16
  579 #define IPV6CTL_AUTO_FLOWLABEL  17
  580 #define IPV6CTL_DEFMCASTHLIM    18
  581 #define IPV6CTL_GIF_HLIM        19      /* default HLIM for gif encap packet */
  582 #define IPV6CTL_KAME_VERSION    20
  583 #define IPV6CTL_USE_DEPRECATED  21      /* use deprecated addr (RFC2462 5.5.4) */
  584 #define IPV6CTL_RR_PRUNE        22      /* walk timer for router renumbering */
  585 #if 0   /* obsolete */
  586 #define IPV6CTL_MAPPED_ADDR     23
  587 #endif
  588 #define IPV6CTL_V6ONLY          24
  589 #define IPV6CTL_RTEXPIRE        25      /* cloned route expiration time */
  590 #define IPV6CTL_RTMINEXPIRE     26      /* min value for expiration time */
  591 #define IPV6CTL_RTMAXCACHE      27      /* trigger level for dynamic expire */
  592 
  593 #define IPV6CTL_USETEMPADDR     32      /* use temporary addresses (RFC3041) */
  594 #define IPV6CTL_TEMPPLTIME      33      /* preferred lifetime for tmpaddrs */
  595 #define IPV6CTL_TEMPVLTIME      34      /* valid lifetime for tmpaddrs */
  596 #define IPV6CTL_AUTO_LINKLOCAL  35      /* automatic link-local addr assign */
  597 #define IPV6CTL_RIP6STATS       36      /* raw_ip6 stats */
  598 #define IPV6CTL_PREFER_TEMPADDR 37      /* prefer temporary addr as src */
  599 #define IPV6CTL_ADDRCTLPOLICY   38      /* get/set address selection policy */
  600 #define IPV6CTL_USE_DEFAULTZONE 39      /* use default scope zone */
  601 
  602 #define IPV6CTL_MAXFRAGS        41      /* max fragments */
  603 #if 0
  604 #define IPV6CTL_IFQ             42      /* ip6intrq node */
  605 #define IPV6CTL_ISATAPRTR       43      /* isatap router */
  606 #endif
  607 #define IPV6CTL_MCAST_PMTU      44      /* enable pMTU discovery for multicast? */
  608 
  609 /* New entries should be added here from current IPV6CTL_MAXID value. */
  610 /* to define items, should talk with KAME guys first, for *BSD compatibility */
  611 #define IPV6CTL_STEALTH         45
  612 
  613 #define ICMPV6CTL_ND6_ONLINKNSRFC4861   47
  614 #define IPV6CTL_MAXID           48
  615 #endif /* __BSD_VISIBLE */
  616 
  617 /*
  618  * Redefinition of mbuf flags
  619  */
  620 #define M_AUTHIPHDR     M_PROTO2
  621 #define M_DECRYPTED     M_PROTO3
  622 #define M_LOOP          M_PROTO4
  623 #define M_AUTHIPDGM     M_PROTO5
  624 #define M_RTALERT_MLD   M_PROTO6
  625 
  626 #ifdef _KERNEL
  627 struct cmsghdr;
  628 
  629 int     in6_cksum __P((struct mbuf *, u_int8_t, u_int32_t, u_int32_t));
  630 int     in6_localaddr __P((struct in6_addr *));
  631 int     in6_addrscope __P((struct in6_addr *));
  632 struct  in6_ifaddr *in6_ifawithifp __P((struct ifnet *, struct in6_addr *));
  633 extern void in6_if_up __P((struct ifnet *));
  634 struct sockaddr;
  635 extern  u_char  ip6_protox[];
  636 
  637 void    in6_sin6_2_sin __P((struct sockaddr_in *sin,
  638                             struct sockaddr_in6 *sin6));
  639 void    in6_sin_2_v4mapsin6 __P((struct sockaddr_in *sin,
  640                                  struct sockaddr_in6 *sin6));
  641 void    in6_sin6_2_sin_in_sock __P((struct sockaddr *nam));
  642 void    in6_sin_2_v4mapsin6_in_sock __P((struct sockaddr **nam));
  643 extern void addrsel_policy_init __P((void));
  644 
  645 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
  646 #define sin6tosa(sin6)  ((struct sockaddr *)(sin6))
  647 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
  648 
  649 extern int      (*faithprefix_p)(struct in6_addr *);
  650 #endif /* _KERNEL */
  651 
  652 #ifndef _SIZE_T_DECLARED
  653 typedef __size_t        size_t;
  654 #define _SIZE_T_DECLARED
  655 #endif
  656 
  657 #ifndef _SOCKLEN_T_DECLARED
  658 typedef __socklen_t     socklen_t;
  659 #define _SOCKLEN_T_DECLARED
  660 #endif
  661 
  662 #if __BSD_VISIBLE
  663 
  664 __BEGIN_DECLS
  665 struct cmsghdr;
  666 
  667 extern int inet6_option_space __P((int));
  668 extern int inet6_option_init __P((void *, struct cmsghdr **, int));
  669 extern int inet6_option_append __P((struct cmsghdr *, const uint8_t *,
  670         int, int));
  671 extern uint8_t *inet6_option_alloc __P((struct cmsghdr *, int, int, int));
  672 extern int inet6_option_next __P((const struct cmsghdr *, uint8_t **));
  673 extern int inet6_option_find __P((const struct cmsghdr *, uint8_t **, int));
  674 
  675 extern size_t inet6_rthdr_space __P((int, int));
  676 extern struct cmsghdr *inet6_rthdr_init __P((void *, int));
  677 extern int inet6_rthdr_add __P((struct cmsghdr *, const struct in6_addr *,
  678         unsigned int));
  679 extern int inet6_rthdr_lasthop __P((struct cmsghdr *, unsigned int));
  680 #if 0 /* not implemented yet */
  681 extern int inet6_rthdr_reverse __P((const struct cmsghdr *, struct cmsghdr *));
  682 #endif
  683 extern int inet6_rthdr_segments __P((const struct cmsghdr *));
  684 extern struct in6_addr *inet6_rthdr_getaddr __P((struct cmsghdr *, int));
  685 extern int inet6_rthdr_getflags __P((const struct cmsghdr *, int));
  686 
  687 extern int inet6_opt_init __P((void *, socklen_t));
  688 extern int inet6_opt_append __P((void *, socklen_t, int, uint8_t, socklen_t,
  689         uint8_t, void **));
  690 extern int inet6_opt_finish __P((void *, socklen_t, int));
  691 extern int inet6_opt_set_val __P((void *, int, void *, socklen_t));
  692 
  693 extern int inet6_opt_next __P((void *, socklen_t, int, uint8_t *, socklen_t *,
  694         void **));
  695 extern int inet6_opt_find __P((void *, socklen_t, int, uint8_t, socklen_t *,
  696         void **));
  697 extern int inet6_opt_get_val __P((void *, int, void *, socklen_t));
  698 extern socklen_t inet6_rth_space __P((int, int));
  699 extern void *inet6_rth_init __P((void *, socklen_t, int, int));
  700 extern int inet6_rth_add __P((void *, const struct in6_addr *));
  701 extern int inet6_rth_reverse __P((const void *, void *));
  702 extern int inet6_rth_segments __P((const void *));
  703 extern struct in6_addr *inet6_rth_getaddr __P((const void *, int));
  704 __END_DECLS
  705 
  706 #endif /* __BSD_VISIBLE */
  707 
  708 #endif /* !_NETINET6_IN6_H_ */

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