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: releng/6.4/sys/netinet6/in6.h 183529 2008-10-02 00:32:59Z cperciva $
   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 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 #endif
  205 
  206 extern const struct in6_addr in6addr_any;
  207 extern const struct in6_addr in6addr_loopback;
  208 #if __BSD_VISIBLE
  209 extern const struct in6_addr in6addr_nodelocal_allnodes;
  210 extern const struct in6_addr in6addr_linklocal_allnodes;
  211 extern const struct in6_addr in6addr_linklocal_allrouters;
  212 #endif
  213 
  214 /*
  215  * Equality
  216  * NOTE: Some of kernel programming environment (for example, openbsd/sparc)
  217  * does not supply memcmp().  For userland memcmp() is preferred as it is
  218  * in ANSI standard.
  219  */
  220 #ifdef _KERNEL
  221 #define IN6_ARE_ADDR_EQUAL(a, b)                        \
  222     (bcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
  223 #else
  224 #if __BSD_VISIBLE
  225 #define IN6_ARE_ADDR_EQUAL(a, b)                        \
  226     (memcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
  227 #endif
  228 #endif
  229 
  230 /*
  231  * Unspecified
  232  */
  233 #define IN6_IS_ADDR_UNSPECIFIED(a)      \
  234         ((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
  235          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
  236          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == 0) && \
  237          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) == 0))
  238 
  239 /*
  240  * Loopback
  241  */
  242 #define IN6_IS_ADDR_LOOPBACK(a)         \
  243         ((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
  244          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
  245          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == 0) && \
  246          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) == ntohl(1)))
  247 
  248 /*
  249  * IPv4 compatible
  250  */
  251 #define IN6_IS_ADDR_V4COMPAT(a)         \
  252         ((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
  253          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
  254          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == 0) && \
  255          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) != 0) &&        \
  256          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) != ntohl(1)))
  257 
  258 /*
  259  * Mapped
  260  */
  261 #define IN6_IS_ADDR_V4MAPPED(a)               \
  262         ((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
  263          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
  264          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == ntohl(0x0000ffff)))
  265 
  266 /*
  267  * KAME Scope Values
  268  */
  269 
  270 #ifdef _KERNEL  /* XXX nonstandard */
  271 #define IPV6_ADDR_SCOPE_NODELOCAL       0x01
  272 #define IPV6_ADDR_SCOPE_INTFACELOCAL    0x01
  273 #define IPV6_ADDR_SCOPE_LINKLOCAL       0x02
  274 #define IPV6_ADDR_SCOPE_SITELOCAL       0x05
  275 #define IPV6_ADDR_SCOPE_ORGLOCAL        0x08    /* just used in this file */
  276 #define IPV6_ADDR_SCOPE_GLOBAL          0x0e
  277 #else
  278 #define __IPV6_ADDR_SCOPE_NODELOCAL     0x01
  279 #define __IPV6_ADDR_SCOPE_INTFACELOCAL  0x01
  280 #define __IPV6_ADDR_SCOPE_LINKLOCAL     0x02
  281 #define __IPV6_ADDR_SCOPE_SITELOCAL     0x05
  282 #define __IPV6_ADDR_SCOPE_ORGLOCAL      0x08    /* just used in this file */
  283 #define __IPV6_ADDR_SCOPE_GLOBAL        0x0e
  284 #endif
  285 
  286 /*
  287  * Unicast Scope
  288  * Note that we must check topmost 10 bits only, not 16 bits (see RFC2373).
  289  */
  290 #define IN6_IS_ADDR_LINKLOCAL(a)        \
  291         (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0x80))
  292 #define IN6_IS_ADDR_SITELOCAL(a)        \
  293         (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0xc0))
  294 
  295 /*
  296  * Multicast
  297  */
  298 #define IN6_IS_ADDR_MULTICAST(a)        ((a)->s6_addr[0] == 0xff)
  299 
  300 #ifdef _KERNEL  /* XXX nonstandard */
  301 #define IPV6_ADDR_MC_SCOPE(a)           ((a)->s6_addr[1] & 0x0f)
  302 #else
  303 #define __IPV6_ADDR_MC_SCOPE(a)         ((a)->s6_addr[1] & 0x0f)
  304 #endif
  305 
  306 /*
  307  * Multicast Scope
  308  */
  309 #ifdef _KERNEL  /* refers nonstandard items */
  310 #define IN6_IS_ADDR_MC_NODELOCAL(a)     \
  311         (IN6_IS_ADDR_MULTICAST(a) &&    \
  312          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_NODELOCAL))
  313 #define IN6_IS_ADDR_MC_INTFACELOCAL(a)  \
  314         (IN6_IS_ADDR_MULTICAST(a) &&    \
  315          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_INTFACELOCAL))
  316 #define IN6_IS_ADDR_MC_LINKLOCAL(a)     \
  317         (IN6_IS_ADDR_MULTICAST(a) &&    \
  318          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_LINKLOCAL))
  319 #define IN6_IS_ADDR_MC_SITELOCAL(a)     \
  320         (IN6_IS_ADDR_MULTICAST(a) &&    \
  321          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_SITELOCAL))
  322 #define IN6_IS_ADDR_MC_ORGLOCAL(a)      \
  323         (IN6_IS_ADDR_MULTICAST(a) &&    \
  324          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_ORGLOCAL))
  325 #define IN6_IS_ADDR_MC_GLOBAL(a)        \
  326         (IN6_IS_ADDR_MULTICAST(a) &&    \
  327          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_GLOBAL))
  328 #else
  329 #define IN6_IS_ADDR_MC_NODELOCAL(a)     \
  330         (IN6_IS_ADDR_MULTICAST(a) &&    \
  331          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_NODELOCAL))
  332 #define IN6_IS_ADDR_MC_LINKLOCAL(a)     \
  333         (IN6_IS_ADDR_MULTICAST(a) &&    \
  334          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_LINKLOCAL))
  335 #define IN6_IS_ADDR_MC_SITELOCAL(a)     \
  336         (IN6_IS_ADDR_MULTICAST(a) &&    \
  337          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_SITELOCAL))
  338 #define IN6_IS_ADDR_MC_ORGLOCAL(a)      \
  339         (IN6_IS_ADDR_MULTICAST(a) &&    \
  340          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_ORGLOCAL))
  341 #define IN6_IS_ADDR_MC_GLOBAL(a)        \
  342         (IN6_IS_ADDR_MULTICAST(a) &&    \
  343          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_GLOBAL))
  344 #endif
  345 
  346 #ifdef _KERNEL  /* nonstandard */
  347 /*
  348  * KAME Scope
  349  */
  350 #define IN6_IS_SCOPE_LINKLOCAL(a)       \
  351         ((IN6_IS_ADDR_LINKLOCAL(a)) ||  \
  352          (IN6_IS_ADDR_MC_LINKLOCAL(a)))
  353 
  354 #define IFA6_IS_DEPRECATED(a) \
  355         ((a)->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME && \
  356          (u_int32_t)((time_second - (a)->ia6_updatetime)) > \
  357          (a)->ia6_lifetime.ia6t_pltime)
  358 #define IFA6_IS_INVALID(a) \
  359         ((a)->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME && \
  360          (u_int32_t)((time_second - (a)->ia6_updatetime)) > \
  361          (a)->ia6_lifetime.ia6t_vltime)
  362 #endif /* _KERNEL */
  363 
  364 /*
  365  * IP6 route structure
  366  */
  367 #if __BSD_VISIBLE
  368 struct route_in6 {
  369         struct  rtentry *ro_rt;
  370         struct  sockaddr_in6 ro_dst;
  371 };
  372 #endif
  373 
  374 /*
  375  * Options for use with [gs]etsockopt at the IPV6 level.
  376  * First word of comment is data type; bool is stored in int.
  377  */
  378 /* no hdrincl */
  379 #if 0 /* the followings are relic in IPv4 and hence are disabled */
  380 #define IPV6_OPTIONS            1  /* buf/ip6_opts; set/get IP6 options */
  381 #define IPV6_RECVOPTS           5  /* bool; receive all IP6 opts w/dgram */
  382 #define IPV6_RECVRETOPTS        6  /* bool; receive IP6 opts for response */
  383 #define IPV6_RECVDSTADDR        7  /* bool; receive IP6 dst addr w/dgram */
  384 #define IPV6_RETOPTS            8  /* ip6_opts; set/get IP6 options */
  385 #endif
  386 #define IPV6_SOCKOPT_RESERVED1  3  /* reserved for future use */
  387 #define IPV6_UNICAST_HOPS       4  /* int; IP6 hops */
  388 #define IPV6_MULTICAST_IF       9  /* u_int; set/get IP6 multicast i/f  */
  389 #define IPV6_MULTICAST_HOPS     10 /* int; set/get IP6 multicast hops */
  390 #define IPV6_MULTICAST_LOOP     11 /* u_int; set/get IP6 multicast loopback */
  391 #define IPV6_JOIN_GROUP         12 /* ip6_mreq; join a group membership */
  392 #define IPV6_LEAVE_GROUP        13 /* ip6_mreq; leave a group membership */
  393 #define IPV6_PORTRANGE          14 /* int; range to choose for unspec port */
  394 #define ICMP6_FILTER            18 /* icmp6_filter; icmp6 filter */
  395 /* RFC2292 options */
  396 #ifdef _KERNEL
  397 #define IPV6_2292PKTINFO        19 /* bool; send/recv if, src/dst addr */
  398 #define IPV6_2292HOPLIMIT       20 /* bool; hop limit */
  399 #define IPV6_2292NEXTHOP        21 /* bool; next hop addr */
  400 #define IPV6_2292HOPOPTS        22 /* bool; hop-by-hop option */
  401 #define IPV6_2292DSTOPTS        23 /* bool; destinaion option */
  402 #define IPV6_2292RTHDR          24 /* bool; routing header */
  403 #define IPV6_2292PKTOPTIONS     25 /* buf/cmsghdr; set/get IPv6 options */
  404 #endif
  405 
  406 #define IPV6_CHECKSUM           26 /* int; checksum offset for raw socket */
  407 #define IPV6_V6ONLY             27 /* bool; make AF_INET6 sockets v6 only */
  408 #ifndef _KERNEL
  409 #define IPV6_BINDV6ONLY         IPV6_V6ONLY
  410 #endif
  411 
  412 #if 1 /* IPSEC */
  413 #define IPV6_IPSEC_POLICY       28 /* struct; get/set security policy */
  414 #endif
  415 #define IPV6_FAITH              29 /* bool; accept FAITH'ed connections */
  416 
  417 #if 1 /* IPV6FIREWALL */
  418 #define IPV6_FW_ADD             30 /* add a firewall rule to chain */
  419 #define IPV6_FW_DEL             31 /* delete a firewall rule from chain */
  420 #define IPV6_FW_FLUSH           32 /* flush firewall rule chain */
  421 #define IPV6_FW_ZERO            33 /* clear single/all firewall counter(s) */
  422 #define IPV6_FW_GET             34 /* get entire firewall rule chain */
  423 #endif
  424 
  425 /* new socket options introduced in RFC3542 */
  426 #define IPV6_RTHDRDSTOPTS       35 /* ip6_dest; send dst option before rthdr */
  427 
  428 #define IPV6_RECVPKTINFO        36 /* bool; recv if, dst addr */
  429 #define IPV6_RECVHOPLIMIT       37 /* bool; recv hop limit */
  430 #define IPV6_RECVRTHDR          38 /* bool; recv routing header */
  431 #define IPV6_RECVHOPOPTS        39 /* bool; recv hop-by-hop option */
  432 #define IPV6_RECVDSTOPTS        40 /* bool; recv dst option after rthdr */
  433 #ifdef _KERNEL
  434 #define IPV6_RECVRTHDRDSTOPTS   41 /* bool; recv dst option before rthdr */
  435 #endif
  436 
  437 #define IPV6_USE_MIN_MTU        42 /* bool; send packets at the minimum MTU */
  438 #define IPV6_RECVPATHMTU        43 /* bool; notify an according MTU */
  439 
  440 #define IPV6_PATHMTU            44 /* mtuinfo; get the current path MTU (sopt),
  441                                       4 bytes int; MTU notification (cmsg) */
  442 #if 0 /*obsoleted during 2292bis -> 3542*/
  443 #define IPV6_REACHCONF          45 /* no data; ND reachability confirm
  444                                       (cmsg only/not in of RFC3542) */
  445 #endif
  446 
  447 /* more new socket options introduced in RFC3542 */
  448 #define IPV6_PKTINFO            46 /* in6_pktinfo; send if, src addr */
  449 #define IPV6_HOPLIMIT           47 /* int; send hop limit */
  450 #define IPV6_NEXTHOP            48 /* sockaddr; next hop addr */
  451 #define IPV6_HOPOPTS            49 /* ip6_hbh; send hop-by-hop option */
  452 #define IPV6_DSTOPTS            50 /* ip6_dest; send dst option befor rthdr */
  453 #define IPV6_RTHDR              51 /* ip6_rthdr; send routing header */
  454 #if 0
  455 #define IPV6_PKTOPTIONS         52 /* buf/cmsghdr; set/get IPv6 options */
  456                                    /* obsoleted by RFC3542 */
  457 #endif
  458 
  459 #define IPV6_RECVTCLASS         57 /* bool; recv traffic class values */
  460 
  461 #define IPV6_AUTOFLOWLABEL      59 /* bool; attach flowlabel automagically */
  462 
  463 #define IPV6_TCLASS             61 /* int; send traffic class value */
  464 #define IPV6_DONTFRAG           62 /* bool; disable IPv6 fragmentation */
  465 
  466 #define IPV6_PREFER_TEMPADDR    63 /* int; prefer temporary addresses as
  467                                     * the source address.
  468                                     */
  469 
  470 /* to define items, should talk with KAME guys first, for *BSD compatibility */
  471 
  472 #define IPV6_RTHDR_LOOSE     0 /* this hop need not be a neighbor. XXX old spec */
  473 #define IPV6_RTHDR_STRICT    1 /* this hop must be a neighbor. XXX old spec */
  474 #define IPV6_RTHDR_TYPE_0    0 /* IPv6 routing header type 0 */
  475 
  476 /*
  477  * Defaults and limits for options
  478  */
  479 #define IPV6_DEFAULT_MULTICAST_HOPS 1   /* normally limit m'casts to 1 hop */
  480 #define IPV6_DEFAULT_MULTICAST_LOOP 1   /* normally hear sends if a member */
  481 
  482 /*
  483  * Argument structure for IPV6_JOIN_GROUP and IPV6_LEAVE_GROUP.
  484  */
  485 struct ipv6_mreq {
  486         struct in6_addr ipv6mr_multiaddr;
  487         unsigned int    ipv6mr_interface;
  488 };
  489 
  490 /*
  491  * IPV6_PKTINFO: Packet information(RFC2292 sec 5)
  492  */
  493 struct in6_pktinfo {
  494         struct in6_addr ipi6_addr;      /* src/dst IPv6 address */
  495         unsigned int    ipi6_ifindex;   /* send/recv interface index */
  496 };
  497 
  498 /*
  499  * Control structure for IPV6_RECVPATHMTU socket option.
  500  */
  501 struct ip6_mtuinfo {
  502         struct sockaddr_in6 ip6m_addr;  /* or sockaddr_storage? */
  503         uint32_t ip6m_mtu;
  504 };
  505 
  506 /*
  507  * Argument for IPV6_PORTRANGE:
  508  * - which range to search when port is unspecified at bind() or connect()
  509  */
  510 #define IPV6_PORTRANGE_DEFAULT  0       /* default range */
  511 #define IPV6_PORTRANGE_HIGH     1       /* "high" - request firewall bypass */
  512 #define IPV6_PORTRANGE_LOW      2       /* "low" - vouchsafe security */
  513 
  514 #if __BSD_VISIBLE
  515 /*
  516  * Definitions for inet6 sysctl operations.
  517  *
  518  * Third level is protocol number.
  519  * Fourth level is desired variable within that protocol.
  520  */
  521 #define IPV6PROTO_MAXID (IPPROTO_PIM + 1)       /* don't list to IPV6PROTO_MAX */
  522 
  523 /*
  524  * Names for IP sysctl objects
  525  */
  526 #define IPV6CTL_FORWARDING      1       /* act as router */
  527 #define IPV6CTL_SENDREDIRECTS   2       /* may send redirects when forwarding*/
  528 #define IPV6CTL_DEFHLIM         3       /* default Hop-Limit */
  529 #ifdef notyet
  530 #define IPV6CTL_DEFMTU          4       /* default MTU */
  531 #endif
  532 #define IPV6CTL_FORWSRCRT       5       /* forward source-routed dgrams */
  533 #define IPV6CTL_STATS           6       /* stats */
  534 #define IPV6CTL_MRTSTATS        7       /* multicast forwarding stats */
  535 #define IPV6CTL_MRTPROTO        8       /* multicast routing protocol */
  536 #define IPV6CTL_MAXFRAGPACKETS  9       /* max packets reassembly queue */
  537 #define IPV6CTL_SOURCECHECK     10      /* verify source route and intf */
  538 #define IPV6CTL_SOURCECHECK_LOGINT 11   /* minimume logging interval */
  539 #define IPV6CTL_ACCEPT_RTADV    12
  540 #define IPV6CTL_KEEPFAITH       13
  541 #define IPV6CTL_LOG_INTERVAL    14
  542 #define IPV6CTL_HDRNESTLIMIT    15
  543 #define IPV6CTL_DAD_COUNT       16
  544 #define IPV6CTL_AUTO_FLOWLABEL  17
  545 #define IPV6CTL_DEFMCASTHLIM    18
  546 #define IPV6CTL_GIF_HLIM        19      /* default HLIM for gif encap packet */
  547 #define IPV6CTL_KAME_VERSION    20
  548 #define IPV6CTL_USE_DEPRECATED  21      /* use deprecated addr (RFC2462 5.5.4) */
  549 #define IPV6CTL_RR_PRUNE        22      /* walk timer for router renumbering */
  550 #if 0   /* obsolete */
  551 #define IPV6CTL_MAPPED_ADDR     23
  552 #endif
  553 #define IPV6CTL_V6ONLY          24
  554 #define IPV6CTL_RTEXPIRE        25      /* cloned route expiration time */
  555 #define IPV6CTL_RTMINEXPIRE     26      /* min value for expiration time */
  556 #define IPV6CTL_RTMAXCACHE      27      /* trigger level for dynamic expire */
  557 
  558 #define IPV6CTL_USETEMPADDR     32      /* use temporary addresses (RFC3041) */
  559 #define IPV6CTL_TEMPPLTIME      33      /* preferred lifetime for tmpaddrs */
  560 #define IPV6CTL_TEMPVLTIME      34      /* valid lifetime for tmpaddrs */
  561 #define IPV6CTL_AUTO_LINKLOCAL  35      /* automatic link-local addr assign */
  562 #define IPV6CTL_RIP6STATS       36      /* raw_ip6 stats */
  563 #define IPV6CTL_PREFER_TEMPADDR 37      /* prefer temporary addr as src */
  564 #define IPV6CTL_ADDRCTLPOLICY   38      /* get/set address selection policy */
  565 #define IPV6CTL_USE_DEFAULTZONE 39      /* use default scope zone */
  566 
  567 #define IPV6CTL_MAXFRAGS        41      /* max fragments */
  568 #if 0
  569 #define IPV6CTL_IFQ             42      /* ip6intrq node */
  570 #define IPV6CTL_ISATAPRTR       43      /* isatap router */
  571 #endif
  572 #define IPV6CTL_MCAST_PMTU      44      /* enable pMTU discovery for multicast? */
  573 
  574 /* New entries should be added here from current IPV6CTL_MAXID value. */
  575 /* to define items, should talk with KAME guys first, for *BSD compatibility */
  576 #define IPV6CTL_STEALTH         45
  577 #define IPV6CTL_RTHDR0_ALLOWED  46
  578 #define ICMPV6CTL_ND6_ONLINKNSRFC4861   47
  579 #define IPV6CTL_MAXID           48
  580 #endif /* __BSD_VISIBLE */
  581 
  582 /*
  583  * Redefinition of mbuf flags
  584  */
  585 #define M_AUTHIPHDR     M_PROTO2
  586 #define M_DECRYPTED     M_PROTO3
  587 #define M_LOOP          M_PROTO4
  588 #define M_AUTHIPDGM     M_PROTO5
  589 
  590 #ifdef _KERNEL
  591 struct cmsghdr;
  592 
  593 int     in6_cksum __P((struct mbuf *, u_int8_t, u_int32_t, u_int32_t));
  594 int     in6_localaddr __P((struct in6_addr *));
  595 int     in6_addrscope __P((struct in6_addr *));
  596 struct  in6_ifaddr *in6_ifawithifp __P((struct ifnet *, struct in6_addr *));
  597 extern void in6_if_up __P((struct ifnet *));
  598 struct sockaddr;
  599 extern  u_char  ip6_protox[];
  600 
  601 void    in6_sin6_2_sin __P((struct sockaddr_in *sin,
  602                             struct sockaddr_in6 *sin6));
  603 void    in6_sin_2_v4mapsin6 __P((struct sockaddr_in *sin,
  604                                  struct sockaddr_in6 *sin6));
  605 void    in6_sin6_2_sin_in_sock __P((struct sockaddr *nam));
  606 void    in6_sin_2_v4mapsin6_in_sock __P((struct sockaddr **nam));
  607 extern void addrsel_policy_init __P((void));
  608 
  609 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
  610 #define sin6tosa(sin6)  ((struct sockaddr *)(sin6))
  611 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
  612 
  613 extern int      (*faithprefix_p)(struct in6_addr *);
  614 #endif /* _KERNEL */
  615 
  616 #ifndef _SIZE_T_DECLARED
  617 typedef __size_t        size_t;
  618 #define _SIZE_T_DECLARED
  619 #endif
  620 
  621 #ifndef _SOCKLEN_T_DECLARED
  622 typedef __socklen_t     socklen_t;
  623 #define _SOCKLEN_T_DECLARED
  624 #endif
  625 
  626 #if __BSD_VISIBLE
  627 
  628 __BEGIN_DECLS
  629 struct cmsghdr;
  630 
  631 extern int inet6_option_space __P((int));
  632 extern int inet6_option_init __P((void *, struct cmsghdr **, int));
  633 extern int inet6_option_append __P((struct cmsghdr *, const uint8_t *,
  634         int, int));
  635 extern uint8_t *inet6_option_alloc __P((struct cmsghdr *, int, int, int));
  636 extern int inet6_option_next __P((const struct cmsghdr *, uint8_t **));
  637 extern int inet6_option_find __P((const struct cmsghdr *, uint8_t **, int));
  638 
  639 extern size_t inet6_rthdr_space __P((int, int));
  640 extern struct cmsghdr *inet6_rthdr_init __P((void *, int));
  641 extern int inet6_rthdr_add __P((struct cmsghdr *, const struct in6_addr *,
  642         unsigned int));
  643 extern int inet6_rthdr_lasthop __P((struct cmsghdr *, unsigned int));
  644 #if 0 /* not implemented yet */
  645 extern int inet6_rthdr_reverse __P((const struct cmsghdr *, struct cmsghdr *));
  646 #endif
  647 extern int inet6_rthdr_segments __P((const struct cmsghdr *));
  648 extern struct in6_addr *inet6_rthdr_getaddr __P((struct cmsghdr *, int));
  649 extern int inet6_rthdr_getflags __P((const struct cmsghdr *, int));
  650 
  651 extern int inet6_opt_init __P((void *, socklen_t));
  652 extern int inet6_opt_append __P((void *, socklen_t, int, uint8_t, socklen_t,
  653         uint8_t, void **));
  654 extern int inet6_opt_finish __P((void *, socklen_t, int));
  655 extern int inet6_opt_set_val __P((void *, int, void *, socklen_t));
  656 
  657 extern int inet6_opt_next __P((void *, socklen_t, int, uint8_t *, socklen_t *,
  658         void **));
  659 extern int inet6_opt_find __P((void *, socklen_t, int, uint8_t, socklen_t *,
  660         void **));
  661 extern int inet6_opt_get_val __P((void *, int, void *, socklen_t));
  662 extern socklen_t inet6_rth_space __P((int, int));
  663 extern void *inet6_rth_init __P((void *, socklen_t, int, int));
  664 extern int inet6_rth_add __P((void *, const struct in6_addr *));
  665 extern int inet6_rth_reverse __P((const void *, void *));
  666 extern int inet6_rth_segments __P((const void *));
  667 extern struct in6_addr *inet6_rth_getaddr __P((const void *, int));
  668 __END_DECLS
  669 
  670 #endif /* __BSD_VISIBLE */
  671 
  672 #endif /* !_NETINET6_IN6_H_ */

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