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 /*      $FreeBSD$       */
    2 /*      $KAME: in6.h,v 1.89 2001/05/27 13:28:35 itojun Exp $    */
    3 
    4 /*
    5  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. Neither the name of the project nor the names of its contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  */
   32 
   33 /*
   34  * Copyright (c) 1982, 1986, 1990, 1993
   35  *      The Regents of the University of California.  All rights reserved.
   36  *
   37  * Redistribution and use in source and binary forms, with or without
   38  * modification, are permitted provided that the following conditions
   39  * are met:
   40  * 1. Redistributions of source code must retain the above copyright
   41  *    notice, this list of conditions and the following disclaimer.
   42  * 2. Redistributions in binary form must reproduce the above copyright
   43  *    notice, this list of conditions and the following disclaimer in the
   44  *    documentation and/or other materials provided with the distribution.
   45  * 3. All advertising materials mentioning features or use of this software
   46  *    must display the following acknowledgement:
   47  *      This product includes software developed by the University of
   48  *      California, Berkeley and its contributors.
   49  * 4. Neither the name of the University nor the names of its contributors
   50  *    may be used to endorse or promote products derived from this software
   51  *    without specific prior written permission.
   52  *
   53  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   54  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   55  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   56  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   57  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   58  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   59  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   60  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   61  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   62  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   63  * SUCH DAMAGE.
   64  *
   65  *      @(#)in.h        8.3 (Berkeley) 1/3/94
   66  */
   67 
   68 #ifndef __KAME_NETINET_IN_H_INCLUDED_
   69 #error "do not include netinet6/in6.h directly, include netinet/in.h.  see RFC2553"
   70 #endif
   71 
   72 #ifndef _NETINET6_IN6_H_
   73 #define _NETINET6_IN6_H_
   74 
   75 /*
   76  * Identification of the network protocol stack
   77  * for *BSD-current/release: http://www.kame.net/dev/cvsweb.cgi/kame/COVERAGE
   78  * has the table of implementation/integration differences.
   79  */
   80 #define __KAME__
   81 #define __KAME_VERSION          "20010528/FreeBSD"
   82 
   83 /*
   84  * Local port number conventions:
   85  *
   86  * Ports < IPPORT_RESERVED are reserved for privileged processes (e.g. root),
   87  * unless a kernel is compiled with IPNOPRIVPORTS defined.
   88  *
   89  * When a user does a bind(2) or connect(2) with a port number of zero,
   90  * a non-conflicting local port address is chosen.
   91  *
   92  * The default range is IPPORT_ANONMIN to IPPORT_ANONMAX, although
   93  * that is settable by sysctl(3); net.inet.ip.anonportmin and
   94  * net.inet.ip.anonportmax respectively.
   95  *
   96  * A user may set the IPPROTO_IP option IP_PORTRANGE to change this
   97  * default assignment range.
   98  *
   99  * The value IP_PORTRANGE_DEFAULT causes the default behavior.
  100  *
  101  * The value IP_PORTRANGE_HIGH is the same as IP_PORTRANGE_DEFAULT,
  102  * and exists only for FreeBSD compatibility purposes.
  103  *
  104  * The value IP_PORTRANGE_LOW changes the range to the "low" are
  105  * that is (by convention) restricted to privileged processes.
  106  * This convention is based on "vouchsafe" principles only.
  107  * It is only secure if you trust the remote host to restrict these ports.
  108  * The range is IPPORT_RESERVEDMIN to IPPORT_RESERVEDMAX.
  109  */
  110 
  111 #define IPV6PORT_RESERVED       1024
  112 #define IPV6PORT_ANONMIN        49152
  113 #define IPV6PORT_ANONMAX        65535
  114 #define IPV6PORT_RESERVEDMIN    600
  115 #define IPV6PORT_RESERVEDMAX    (IPV6PORT_RESERVED-1)
  116 
  117 /*
  118  * IPv6 address
  119  */
  120 struct in6_addr {
  121         union {
  122                 u_int8_t   __u6_addr8[16];
  123                 u_int16_t  __u6_addr16[8];
  124                 u_int32_t  __u6_addr32[4];
  125         } __u6_addr;                    /* 128-bit IP6 address */
  126 };
  127 
  128 #define s6_addr   __u6_addr.__u6_addr8
  129 #ifdef _KERNEL  /* XXX nonstandard */
  130 #define s6_addr8  __u6_addr.__u6_addr8
  131 #define s6_addr16 __u6_addr.__u6_addr16
  132 #define s6_addr32 __u6_addr.__u6_addr32
  133 #endif
  134 
  135 #define INET6_ADDRSTRLEN        46
  136 
  137 /*
  138  * Socket address for IPv6
  139  */
  140 #ifndef _XOPEN_SOURCE
  141 #define SIN6_LEN
  142 #endif
  143 struct sockaddr_in6 {
  144         u_int8_t        sin6_len;       /* length of this struct(sa_family_t)*/
  145         u_int8_t        sin6_family;    /* AF_INET6 (sa_family_t) */
  146         u_int16_t       sin6_port;      /* Transport layer port # (in_port_t)*/
  147         u_int32_t       sin6_flowinfo;  /* IP6 flow information */
  148         struct in6_addr sin6_addr;      /* IP6 address */
  149         u_int32_t       sin6_scope_id;  /* scope zone index */
  150 };
  151 
  152 /*
  153  * Local definition for masks
  154  */
  155 #ifdef _KERNEL  /* XXX nonstandard */
  156 #define IN6MASK0        {{{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }}}
  157 #define IN6MASK32       {{{ 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, \
  158                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
  159 #define IN6MASK64       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
  160                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
  161 #define IN6MASK96       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
  162                             0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00 }}}
  163 #define IN6MASK128      {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
  164                             0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}}
  165 #endif
  166 
  167 #ifdef _KERNEL
  168 extern const struct sockaddr_in6 sa6_any;
  169 
  170 extern const struct in6_addr in6mask0;
  171 extern const struct in6_addr in6mask32;
  172 extern const struct in6_addr in6mask64;
  173 extern const struct in6_addr in6mask96;
  174 extern const struct in6_addr in6mask128;
  175 #endif /* _KERNEL */
  176 
  177 /*
  178  * Macros started with IPV6_ADDR is KAME local
  179  */
  180 #ifdef _KERNEL  /* XXX nonstandard */
  181 #if BYTE_ORDER == BIG_ENDIAN
  182 #define IPV6_ADDR_INT32_ONE     1
  183 #define IPV6_ADDR_INT32_TWO     2
  184 #define IPV6_ADDR_INT32_MNL     0xff010000
  185 #define IPV6_ADDR_INT32_MLL     0xff020000
  186 #define IPV6_ADDR_INT32_SMP     0x0000ffff
  187 #define IPV6_ADDR_INT16_ULL     0xfe80
  188 #define IPV6_ADDR_INT16_USL     0xfec0
  189 #define IPV6_ADDR_INT16_MLL     0xff02
  190 #elif BYTE_ORDER == LITTLE_ENDIAN
  191 #define IPV6_ADDR_INT32_ONE     0x01000000
  192 #define IPV6_ADDR_INT32_TWO     0x02000000
  193 #define IPV6_ADDR_INT32_MNL     0x000001ff
  194 #define IPV6_ADDR_INT32_MLL     0x000002ff
  195 #define IPV6_ADDR_INT32_SMP     0xffff0000
  196 #define IPV6_ADDR_INT16_ULL     0x80fe
  197 #define IPV6_ADDR_INT16_USL     0xc0fe
  198 #define IPV6_ADDR_INT16_MLL     0x02ff
  199 #endif
  200 #endif
  201 
  202 /*
  203  * Definition of some useful macros to handle IP6 addresses
  204  */
  205 #define IN6ADDR_ANY_INIT \
  206         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  207             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
  208 #define IN6ADDR_LOOPBACK_INIT \
  209         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  210             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
  211 #define IN6ADDR_NODELOCAL_ALLNODES_INIT \
  212         {{{ 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  213             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
  214 #define IN6ADDR_LINKLOCAL_ALLNODES_INIT \
  215         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  216             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
  217 #define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \
  218         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  219             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}}
  220 
  221 extern const struct in6_addr in6addr_any;
  222 extern const struct in6_addr in6addr_loopback;
  223 extern const struct in6_addr in6addr_nodelocal_allnodes;
  224 extern const struct in6_addr in6addr_linklocal_allnodes;
  225 extern const struct in6_addr in6addr_linklocal_allrouters;
  226 
  227 /*
  228  * Equality
  229  * NOTE: Some of kernel programming environment (for example, openbsd/sparc)
  230  * does not supply memcmp().  For userland memcmp() is preferred as it is
  231  * in ANSI standard.
  232  */
  233 #ifdef _KERNEL
  234 #define IN6_ARE_ADDR_EQUAL(a, b)                        \
  235     (bcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
  236 #else
  237 #define IN6_ARE_ADDR_EQUAL(a, b)                        \
  238     (memcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
  239 #endif
  240 
  241 #ifdef _KERNEL                  /* non standard */
  242 /* see if two addresses are equal in a scope-conscious manner. */
  243 #define SA6_ARE_ADDR_EQUAL(a, b) \
  244         (((a)->sin6_scope_id == 0 || (b)->sin6_scope_id == 0 || \
  245           ((a)->sin6_scope_id == (b)->sin6_scope_id)) && \
  246          (bcmp(&(a)->sin6_addr, &(b)->sin6_addr, sizeof(struct in6_addr)) == 0))
  247 #endif
  248 
  249 /*
  250  * Unspecified
  251  */
  252 #define IN6_IS_ADDR_UNSPECIFIED(a)      \
  253         ((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
  254          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
  255          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == 0) && \
  256          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) == 0))
  257 
  258 /*
  259  * Loopback
  260  */
  261 #define IN6_IS_ADDR_LOOPBACK(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]) == 0) && \
  265          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) == ntohl(1)))
  266 
  267 /*
  268  * IPv4 compatible
  269  */
  270 #define IN6_IS_ADDR_V4COMPAT(a)         \
  271         ((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
  272          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
  273          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == 0) && \
  274          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) != 0) &&        \
  275          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) != ntohl(1)))
  276 
  277 /*
  278  * Mapped
  279  */
  280 #define IN6_IS_ADDR_V4MAPPED(a)               \
  281         ((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
  282          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
  283          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == ntohl(0x0000ffff)))
  284 
  285 /*
  286  * KAME Scope Values
  287  */
  288 
  289 #ifdef _KERNEL  /* XXX nonstandard */
  290 #define IPV6_ADDR_SCOPE_NODELOCAL       0x01
  291 #define IPV6_ADDR_SCOPE_LINKLOCAL       0x02
  292 #define IPV6_ADDR_SCOPE_SITELOCAL       0x05
  293 #define IPV6_ADDR_SCOPE_ORGLOCAL        0x08    /* just used in this file */
  294 #define IPV6_ADDR_SCOPE_GLOBAL          0x0e
  295 #else
  296 #define __IPV6_ADDR_SCOPE_NODELOCAL     0x01
  297 #define __IPV6_ADDR_SCOPE_LINKLOCAL     0x02
  298 #define __IPV6_ADDR_SCOPE_SITELOCAL     0x05
  299 #define __IPV6_ADDR_SCOPE_ORGLOCAL      0x08    /* just used in this file */
  300 #define __IPV6_ADDR_SCOPE_GLOBAL        0x0e
  301 #endif
  302 
  303 /*
  304  * Unicast Scope
  305  * Note that we must check topmost 10 bits only, not 16 bits (see RFC2373).
  306  */
  307 #define IN6_IS_ADDR_LINKLOCAL(a)        \
  308         (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0x80))
  309 #define IN6_IS_ADDR_SITELOCAL(a)        \
  310         (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0xc0))
  311 
  312 /*
  313  * Multicast
  314  */
  315 #define IN6_IS_ADDR_MULTICAST(a)        ((a)->s6_addr[0] == 0xff)
  316 
  317 #ifdef _KERNEL  /* XXX nonstandard */
  318 #define IPV6_ADDR_MC_SCOPE(a)           ((a)->s6_addr[1] & 0x0f)
  319 #else
  320 #define __IPV6_ADDR_MC_SCOPE(a)         ((a)->s6_addr[1] & 0x0f)
  321 #endif
  322 
  323 /*
  324  * Multicast Scope
  325  */
  326 #ifdef _KERNEL  /* refers nonstandard items */
  327 #define IN6_IS_ADDR_MC_NODELOCAL(a)     \
  328         (IN6_IS_ADDR_MULTICAST(a) &&    \
  329          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_NODELOCAL))
  330 #define IN6_IS_ADDR_MC_LINKLOCAL(a)     \
  331         (IN6_IS_ADDR_MULTICAST(a) &&    \
  332          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_LINKLOCAL))
  333 #define IN6_IS_ADDR_MC_SITELOCAL(a)     \
  334         (IN6_IS_ADDR_MULTICAST(a) &&    \
  335          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_SITELOCAL))
  336 #define IN6_IS_ADDR_MC_ORGLOCAL(a)      \
  337         (IN6_IS_ADDR_MULTICAST(a) &&    \
  338          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_ORGLOCAL))
  339 #define IN6_IS_ADDR_MC_GLOBAL(a)        \
  340         (IN6_IS_ADDR_MULTICAST(a) &&    \
  341          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_GLOBAL))
  342 #else
  343 #define IN6_IS_ADDR_MC_NODELOCAL(a)     \
  344         (IN6_IS_ADDR_MULTICAST(a) &&    \
  345          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_NODELOCAL))
  346 #define IN6_IS_ADDR_MC_LINKLOCAL(a)     \
  347         (IN6_IS_ADDR_MULTICAST(a) &&    \
  348          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_LINKLOCAL))
  349 #define IN6_IS_ADDR_MC_SITELOCAL(a)     \
  350         (IN6_IS_ADDR_MULTICAST(a) &&    \
  351          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_SITELOCAL))
  352 #define IN6_IS_ADDR_MC_ORGLOCAL(a)      \
  353         (IN6_IS_ADDR_MULTICAST(a) &&    \
  354          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_ORGLOCAL))
  355 #define IN6_IS_ADDR_MC_GLOBAL(a)        \
  356         (IN6_IS_ADDR_MULTICAST(a) &&    \
  357          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_GLOBAL))
  358 #endif
  359 
  360 #ifdef _KERNEL  /* nonstandard */
  361 /*
  362  * KAME Scope
  363  */
  364 #define IN6_IS_SCOPE_LINKLOCAL(a)       \
  365         ((IN6_IS_ADDR_LINKLOCAL(a)) ||  \
  366          (IN6_IS_ADDR_MC_LINKLOCAL(a)))
  367 
  368 #define IFA6_IS_DEPRECATED(a) \
  369         ((a)->ia6_lifetime.ia6t_preferred != 0 && \
  370          (a)->ia6_lifetime.ia6t_preferred < time_second)
  371 #define IFA6_IS_INVALID(a) \
  372         ((a)->ia6_lifetime.ia6t_expire != 0 && \
  373          (a)->ia6_lifetime.ia6t_expire < time_second)
  374 #endif /* _KERNEL */
  375 
  376 /*
  377  * IP6 route structure
  378  */
  379 #ifndef _XOPEN_SOURCE
  380 struct route_in6 {
  381         struct  rtentry *ro_rt;
  382         struct  sockaddr_in6 ro_dst;
  383 };
  384 #endif
  385 
  386 /*
  387  * Options for use with [gs]etsockopt at the IPV6 level.
  388  * First word of comment is data type; bool is stored in int.
  389  */
  390 /* no hdrincl */
  391 #if 0 /* the followings are relic in IPv4 and hence are disabled */
  392 #define IPV6_OPTIONS            1  /* buf/ip6_opts; set/get IP6 options */
  393 #define IPV6_RECVOPTS           5  /* bool; receive all IP6 opts w/dgram */
  394 #define IPV6_RECVRETOPTS        6  /* bool; receive IP6 opts for response */
  395 #define IPV6_RECVDSTADDR        7  /* bool; receive IP6 dst addr w/dgram */
  396 #define IPV6_RETOPTS            8  /* ip6_opts; set/get IP6 options */
  397 #endif
  398 #define IPV6_SOCKOPT_RESERVED1  3  /* reserved for future use */
  399 #define IPV6_UNICAST_HOPS       4  /* int; IP6 hops */
  400 #define IPV6_MULTICAST_IF       9  /* u_int; set/get IP6 multicast i/f  */
  401 #define IPV6_MULTICAST_HOPS     10 /* int; set/get IP6 multicast hops */
  402 #define IPV6_MULTICAST_LOOP     11 /* u_int; set/get IP6 multicast loopback */
  403 #define IPV6_JOIN_GROUP         12 /* ip6_mreq; join a group membership */
  404 #define IPV6_LEAVE_GROUP        13 /* ip6_mreq; leave a group membership */
  405 #define IPV6_PORTRANGE          14 /* int; range to choose for unspec port */
  406 #define ICMP6_FILTER            18 /* icmp6_filter; icmp6 filter */
  407 /* RFC2292 options */
  408 #define IPV6_PKTINFO            19 /* bool; send/recv if, src/dst addr */
  409 #define IPV6_HOPLIMIT           20 /* bool; hop limit */
  410 #define IPV6_NEXTHOP            21 /* bool; next hop addr */
  411 #define IPV6_HOPOPTS            22 /* bool; hop-by-hop option */
  412 #define IPV6_DSTOPTS            23 /* bool; destination option */
  413 #define IPV6_RTHDR              24 /* bool; routing header */
  414 #define IPV6_PKTOPTIONS         25 /* buf/cmsghdr; set/get IPv6 options */
  415 
  416 #define IPV6_CHECKSUM           26 /* int; checksum offset for raw socket */
  417 #define IPV6_V6ONLY             27 /* bool; only bind INET6 at wildcard bind */
  418 #ifndef _KERNEL
  419 #define IPV6_BINDV6ONLY         IPV6_V6ONLY
  420 #endif
  421 
  422 #if 1 /* IPSEC */
  423 #define IPV6_IPSEC_POLICY       28 /* struct; get/set security policy */
  424 #endif
  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 /* to define items, should talk with KAME guys first, for *BSD compatibility */
  436 
  437 #define IPV6_RTHDR_LOOSE     0 /* this hop need not be a neighbor. XXX old spec */
  438 #define IPV6_RTHDR_STRICT    1 /* this hop must be a neighbor. XXX old spec */
  439 #define IPV6_RTHDR_TYPE_0    0 /* IPv6 routing header type 0 */
  440 
  441 /*
  442  * Defaults and limits for options
  443  */
  444 #define IPV6_DEFAULT_MULTICAST_HOPS 1   /* normally limit m'casts to 1 hop */
  445 #define IPV6_DEFAULT_MULTICAST_LOOP 1   /* normally hear sends if a member */
  446 
  447 /*
  448  * Argument structure for IPV6_JOIN_GROUP and IPV6_LEAVE_GROUP.
  449  */
  450 struct ipv6_mreq {
  451         struct in6_addr ipv6mr_multiaddr;
  452         unsigned int    ipv6mr_interface;
  453 };
  454 
  455 /*
  456  * IPV6_PKTINFO: Packet information(RFC2292 sec 5)
  457  */
  458 struct in6_pktinfo {
  459         struct in6_addr ipi6_addr;      /* src/dst IPv6 address */
  460         unsigned int    ipi6_ifindex;   /* send/recv interface index */
  461 };
  462 
  463 /*
  464  * Argument for IPV6_PORTRANGE:
  465  * - which range to search when port is unspecified at bind() or connect()
  466  */
  467 #define IPV6_PORTRANGE_DEFAULT  0       /* default range */
  468 #define IPV6_PORTRANGE_HIGH     1       /* "high" - request firewall bypass */
  469 #define IPV6_PORTRANGE_LOW      2       /* "low" - vouchsafe security */
  470 
  471 #ifndef _XOPEN_SOURCE
  472 /*
  473  * Definitions for inet6 sysctl operations.
  474  *
  475  * Third level is protocol number.
  476  * Fourth level is desired variable within that protocol.
  477  */
  478 #define IPV6PROTO_MAXID (IPPROTO_PIM + 1)       /* don't list to IPV6PROTO_MAX */
  479 
  480 #define CTL_IPV6PROTO_NAMES { \
  481         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
  482         { 0, 0 }, \
  483         { "tcp6", CTLTYPE_NODE }, \
  484         { 0, 0 }, \
  485         { 0, 0 }, \
  486         { 0, 0 }, \
  487         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
  488         { 0, 0 }, \
  489         { 0, 0 }, \
  490         { "udp6", CTLTYPE_NODE }, \
  491         { 0, 0 }, \
  492         { 0, 0 }, \
  493         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
  494         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
  495         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
  496         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
  497         { 0, 0 }, \
  498         { "ip6", CTLTYPE_NODE }, \
  499         { 0, 0 }, \
  500         { 0, 0 }, \
  501         { 0, 0 }, \
  502         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
  503         { 0, 0 }, \
  504         { "ipsec6", CTLTYPE_NODE }, \
  505         { 0, 0 }, \
  506         { 0, 0 }, \
  507         { 0, 0 }, \
  508         { 0, 0 }, \
  509         { 0, 0 }, \
  510         { 0, 0 }, \
  511         { "icmp6", CTLTYPE_NODE }, \
  512         { 0, 0 }, \
  513         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
  514         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
  515         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
  516         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
  517         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
  518         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
  519         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
  520         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
  521         { 0, 0 }, \
  522         { 0, 0 }, \
  523         { 0, 0 }, \
  524         { "pim6", CTLTYPE_NODE }, \
  525 }
  526 
  527 /*
  528  * Names for IP sysctl objects
  529  */
  530 #define IPV6CTL_FORWARDING      1       /* act as router */
  531 #define IPV6CTL_SENDREDIRECTS   2       /* may send redirects when forwarding*/
  532 #define IPV6CTL_DEFHLIM         3       /* default Hop-Limit */
  533 #ifdef notyet
  534 #define IPV6CTL_DEFMTU          4       /* default MTU */
  535 #endif
  536 #define IPV6CTL_FORWSRCRT       5       /* forward source-routed dgrams */
  537 #define IPV6CTL_STATS           6       /* stats */
  538 #define IPV6CTL_MRTSTATS        7       /* multicast forwarding stats */
  539 #define IPV6CTL_MRTPROTO        8       /* multicast routing protocol */
  540 #define IPV6CTL_MAXFRAGPACKETS  9       /* max packets reassembly queue */
  541 #define IPV6CTL_SOURCECHECK     10      /* verify source route and intf */
  542 #define IPV6CTL_SOURCECHECK_LOGINT 11   /* minimume logging interval */
  543 #define IPV6CTL_ACCEPT_RTADV    12
  544 #define IPV6CTL_KEEPFAITH       13
  545 #define IPV6CTL_LOG_INTERVAL    14
  546 #define IPV6CTL_HDRNESTLIMIT    15
  547 #define IPV6CTL_DAD_COUNT       16
  548 #define IPV6CTL_AUTO_FLOWLABEL  17
  549 #define IPV6CTL_DEFMCASTHLIM    18
  550 #define IPV6CTL_GIF_HLIM        19      /* default HLIM for gif encap packet */
  551 #define IPV6CTL_KAME_VERSION    20
  552 #define IPV6CTL_USE_DEPRECATED  21      /* use deprecated addr (RFC2462 5.5.4) */
  553 #define IPV6CTL_RR_PRUNE        22      /* walk timer for router renumbering */
  554 #if 0   /* obsolete */
  555 #define IPV6CTL_MAPPED_ADDR     23
  556 #endif
  557 #define IPV6CTL_V6ONLY          24
  558 #define IPV6CTL_RTEXPIRE        25      /* cloned route expiration time */
  559 #define IPV6CTL_RTMINEXPIRE     26      /* min value for expiration time */
  560 #define IPV6CTL_RTMAXCACHE      27      /* trigger level for dynamic expire */
  561 
  562 #define IPV6CTL_USETEMPADDR     32      /* use temporary addresses (RFC3041) */
  563 #define IPV6CTL_TEMPPLTIME      33      /* preferred lifetime for tmpaddrs */
  564 #define IPV6CTL_TEMPVLTIME      34      /* valid lifetime for tmpaddrs */
  565 #define IPV6CTL_AUTO_LINKLOCAL  35      /* automatic link-local addr assign */
  566 #define IPV6CTL_RIP6STATS       36      /* raw_ip6 stats */
  567 
  568 /* New entries should be added here from current IPV6CTL_MAXID value. */
  569 /* to define items, should talk with KAME guys first, for *BSD compatibility */
  570 #define IPV6CTL_MAXID           37
  571 
  572 #endif /* !_XOPEN_SOURCE */
  573 
  574 /*
  575  * Redefinition of mbuf flags
  576  */
  577 #define M_AUTHIPHDR     M_PROTO2
  578 #define M_DECRYPTED     M_PROTO3
  579 #define M_LOOP          M_PROTO4
  580 #define M_AUTHIPDGM     M_PROTO5
  581 
  582 #ifdef _KERNEL
  583 struct cmsghdr;
  584 
  585 int     in6_cksum __P((struct mbuf *, u_int8_t, u_int32_t, u_int32_t));
  586 int     in6_localaddr __P((struct in6_addr *));
  587 int     in6_addrscope __P((struct in6_addr *));
  588 struct  in6_ifaddr *in6_ifawithscope __P((struct ifnet *, struct in6_addr *));
  589 struct  in6_ifaddr *in6_ifawithifp __P((struct ifnet *, struct in6_addr *));
  590 extern void in6_if_up __P((struct ifnet *));
  591 struct sockaddr;
  592 
  593 void    in6_sin6_2_sin __P((struct sockaddr_in *sin,
  594                             struct sockaddr_in6 *sin6));
  595 void    in6_sin_2_v4mapsin6 __P((struct sockaddr_in *sin,
  596                                  struct sockaddr_in6 *sin6));
  597 void    in6_sin6_2_sin_in_sock __P((struct sockaddr *nam));
  598 void    in6_sin_2_v4mapsin6_in_sock __P((struct sockaddr **nam));
  599 
  600 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
  601 #define sin6tosa(sin6)  ((struct sockaddr *)(sin6))
  602 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
  603 
  604 extern int      (*faithprefix_p)(struct in6_addr *);
  605 #endif /* _KERNEL */
  606 
  607 __BEGIN_DECLS
  608 struct cmsghdr;
  609 
  610 extern int inet6_option_space __P((int));
  611 extern int inet6_option_init __P((void *, struct cmsghdr **, int));
  612 extern int inet6_option_append __P((struct cmsghdr *, const u_int8_t *,
  613         int, int));
  614 extern u_int8_t *inet6_option_alloc __P((struct cmsghdr *, int, int, int));
  615 extern int inet6_option_next __P((const struct cmsghdr *, u_int8_t **));
  616 extern int inet6_option_find __P((const struct cmsghdr *, u_int8_t **, int));
  617 
  618 extern size_t inet6_rthdr_space __P((int, int));
  619 extern struct cmsghdr *inet6_rthdr_init __P((void *, int));
  620 extern int inet6_rthdr_add __P((struct cmsghdr *, const struct in6_addr *,
  621                 unsigned int));
  622 extern int inet6_rthdr_lasthop __P((struct cmsghdr *, unsigned int));
  623 #if 0 /* not implemented yet */
  624 extern int inet6_rthdr_reverse __P((const struct cmsghdr *, struct cmsghdr *));
  625 #endif
  626 extern int inet6_rthdr_segments __P((const struct cmsghdr *));
  627 extern struct in6_addr *inet6_rthdr_getaddr __P((struct cmsghdr *, int));
  628 extern int inet6_rthdr_getflags __P((const struct cmsghdr *, int));
  629 
  630 extern int inet6_opt_init __P((void *, size_t));
  631 extern int inet6_opt_append __P((void *, size_t, int, u_int8_t,
  632                                  size_t, u_int8_t, void **));
  633 extern int inet6_opt_finish __P((void *, size_t, int));
  634 extern int inet6_opt_set_val __P((void *, size_t, void *, int));
  635 
  636 extern int inet6_opt_next __P((void *, size_t, int, u_int8_t *,
  637                                size_t *, void **));
  638 extern int inet6_opt_find __P((void *, size_t, int, u_int8_t,
  639                           size_t *, void **));
  640 extern int inet6_opt_get_val __P((void *, size_t, void *, int));
  641 extern size_t inet6_rth_space __P((int, int));
  642 extern void *inet6_rth_init __P((void *, int, int, int));
  643 extern int inet6_rth_add __P((void *, const struct in6_addr *));
  644 extern int inet6_rth_reverse __P((const void *, void *));
  645 extern int inet6_rth_segments __P((const void *));
  646 extern struct in6_addr *inet6_rth_getaddr __P((const void *, int));
  647 __END_DECLS
  648 
  649 #endif /* !_NETINET6_IN6_H_ */

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