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: releng/5.2/sys/netinet6/in6.h 122128 2003-11-05 17:19:31Z ume $       */
    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 #if __BSD_VISIBLE
  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 #endif
  117 
  118 /*
  119  * IPv6 address
  120  */
  121 struct in6_addr {
  122         union {
  123                 uint8_t         __u6_addr8[16];
  124                 uint16_t        __u6_addr16[8];
  125                 uint32_t        __u6_addr32[4];
  126         } __u6_addr;                    /* 128-bit IP6 address */
  127 };
  128 
  129 #define s6_addr   __u6_addr.__u6_addr8
  130 #ifdef _KERNEL  /* XXX nonstandard */
  131 #define s6_addr8  __u6_addr.__u6_addr8
  132 #define s6_addr16 __u6_addr.__u6_addr16
  133 #define s6_addr32 __u6_addr.__u6_addr32
  134 #endif
  135 
  136 #define INET6_ADDRSTRLEN        46
  137 
  138 /*
  139  * XXX missing POSIX.1-2001 macro IPPROTO_IPV6.
  140  */
  141 
  142 /*
  143  * Socket address for IPv6
  144  */
  145 #if __BSD_VISIBLE
  146 #define SIN6_LEN
  147 #endif
  148 
  149 struct sockaddr_in6 {
  150         uint8_t         sin6_len;       /* length of this struct */
  151         sa_family_t     sin6_family;    /* AF_INET6 */
  152         in_port_t       sin6_port;      /* Transport layer port # */
  153         uint32_t        sin6_flowinfo;  /* IP6 flow information */
  154         struct in6_addr sin6_addr;      /* IP6 address */
  155         uint32_t        sin6_scope_id;  /* scope zone index */
  156 };
  157 
  158 /*
  159  * Local definition for masks
  160  */
  161 #ifdef _KERNEL  /* XXX nonstandard */
  162 #define IN6MASK0        {{{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }}}
  163 #define IN6MASK32       {{{ 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, \
  164                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
  165 #define IN6MASK64       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
  166                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
  167 #define IN6MASK96       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
  168                             0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00 }}}
  169 #define IN6MASK128      {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
  170                             0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}}
  171 #endif
  172 
  173 #ifdef _KERNEL
  174 extern const struct sockaddr_in6 sa6_any;
  175 
  176 extern const struct in6_addr in6mask0;
  177 extern const struct in6_addr in6mask32;
  178 extern const struct in6_addr in6mask64;
  179 extern const struct in6_addr in6mask96;
  180 extern const struct in6_addr in6mask128;
  181 #endif /* _KERNEL */
  182 
  183 /*
  184  * Macros started with IPV6_ADDR is KAME local
  185  */
  186 #ifdef _KERNEL  /* XXX nonstandard */
  187 #if _BYTE_ORDER == _BIG_ENDIAN
  188 #define IPV6_ADDR_INT32_ONE     1
  189 #define IPV6_ADDR_INT32_TWO     2
  190 #define IPV6_ADDR_INT32_MNL     0xff010000
  191 #define IPV6_ADDR_INT32_MLL     0xff020000
  192 #define IPV6_ADDR_INT32_SMP     0x0000ffff
  193 #define IPV6_ADDR_INT16_ULL     0xfe80
  194 #define IPV6_ADDR_INT16_USL     0xfec0
  195 #define IPV6_ADDR_INT16_MLL     0xff02
  196 #elif _BYTE_ORDER == _LITTLE_ENDIAN
  197 #define IPV6_ADDR_INT32_ONE     0x01000000
  198 #define IPV6_ADDR_INT32_TWO     0x02000000
  199 #define IPV6_ADDR_INT32_MNL     0x000001ff
  200 #define IPV6_ADDR_INT32_MLL     0x000002ff
  201 #define IPV6_ADDR_INT32_SMP     0xffff0000
  202 #define IPV6_ADDR_INT16_ULL     0x80fe
  203 #define IPV6_ADDR_INT16_USL     0xc0fe
  204 #define IPV6_ADDR_INT16_MLL     0x02ff
  205 #endif
  206 #endif
  207 
  208 /*
  209  * Definition of some useful macros to handle IP6 addresses
  210  */
  211 #if __BSD_VISIBLE
  212 #define IN6ADDR_ANY_INIT \
  213         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  214             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
  215 #define IN6ADDR_LOOPBACK_INIT \
  216         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  217             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
  218 #define IN6ADDR_NODELOCAL_ALLNODES_INIT \
  219         {{{ 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  220             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
  221 #define IN6ADDR_INTFACELOCAL_ALLNODES_INIT \
  222         {{{ 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  223             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
  224 #define IN6ADDR_LINKLOCAL_ALLNODES_INIT \
  225         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  226             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
  227 #define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \
  228         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  229             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}}
  230 #endif
  231 
  232 extern const struct in6_addr in6addr_any;
  233 extern const struct in6_addr in6addr_loopback;
  234 #if __BSD_VISIBLE
  235 extern const struct in6_addr in6addr_nodelocal_allnodes;
  236 extern const struct in6_addr in6addr_linklocal_allnodes;
  237 extern const struct in6_addr in6addr_linklocal_allrouters;
  238 #endif
  239 
  240 /*
  241  * Equality
  242  * NOTE: Some of kernel programming environment (for example, openbsd/sparc)
  243  * does not supply memcmp().  For userland memcmp() is preferred as it is
  244  * in ANSI standard.
  245  */
  246 #ifdef _KERNEL
  247 #define IN6_ARE_ADDR_EQUAL(a, b)                        \
  248     (bcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
  249 #else
  250 #if __BSD_VISIBLE
  251 #define IN6_ARE_ADDR_EQUAL(a, b)                        \
  252     (memcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
  253 #endif
  254 #endif
  255 
  256 #ifdef _KERNEL                  /* non standard */
  257 /* see if two addresses are equal in a scope-conscious manner. */
  258 #define SA6_ARE_ADDR_EQUAL(a, b) \
  259         (((a)->sin6_scope_id == 0 || (b)->sin6_scope_id == 0 || \
  260           ((a)->sin6_scope_id == (b)->sin6_scope_id)) && \
  261          (bcmp(&(a)->sin6_addr, &(b)->sin6_addr, sizeof(struct in6_addr)) == 0))
  262 #endif
  263 
  264 /*
  265  * Unspecified
  266  */
  267 #define IN6_IS_ADDR_UNSPECIFIED(a)      \
  268         ((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
  269          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
  270          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == 0) && \
  271          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) == 0))
  272 
  273 /*
  274  * Loopback
  275  */
  276 #define IN6_IS_ADDR_LOOPBACK(a)         \
  277         ((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
  278          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
  279          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == 0) && \
  280          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) == ntohl(1)))
  281 
  282 /*
  283  * IPv4 compatible
  284  */
  285 #define IN6_IS_ADDR_V4COMPAT(a)         \
  286         ((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
  287          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
  288          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == 0) && \
  289          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) != 0) &&        \
  290          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) != ntohl(1)))
  291 
  292 /*
  293  * Mapped
  294  */
  295 #define IN6_IS_ADDR_V4MAPPED(a)               \
  296         ((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
  297          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
  298          (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == ntohl(0x0000ffff)))
  299 
  300 /*
  301  * KAME Scope Values
  302  */
  303 
  304 #ifdef _KERNEL  /* XXX nonstandard */
  305 #define IPV6_ADDR_SCOPE_NODELOCAL       0x01
  306 #define IPV6_ADDR_SCOPE_INTFACELOCAL    0x01
  307 #define IPV6_ADDR_SCOPE_LINKLOCAL       0x02
  308 #define IPV6_ADDR_SCOPE_SITELOCAL       0x05
  309 #define IPV6_ADDR_SCOPE_ORGLOCAL        0x08    /* just used in this file */
  310 #define IPV6_ADDR_SCOPE_GLOBAL          0x0e
  311 #else
  312 #define __IPV6_ADDR_SCOPE_NODELOCAL     0x01
  313 #define __IPV6_ADDR_SCOPE_INTFACELOCAL  0x01
  314 #define __IPV6_ADDR_SCOPE_LINKLOCAL     0x02
  315 #define __IPV6_ADDR_SCOPE_SITELOCAL     0x05
  316 #define __IPV6_ADDR_SCOPE_ORGLOCAL      0x08    /* just used in this file */
  317 #define __IPV6_ADDR_SCOPE_GLOBAL        0x0e
  318 #endif
  319 
  320 /*
  321  * Unicast Scope
  322  * Note that we must check topmost 10 bits only, not 16 bits (see RFC2373).
  323  */
  324 #define IN6_IS_ADDR_LINKLOCAL(a)        \
  325         (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0x80))
  326 #define IN6_IS_ADDR_SITELOCAL(a)        \
  327         (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0xc0))
  328 
  329 /*
  330  * Multicast
  331  */
  332 #define IN6_IS_ADDR_MULTICAST(a)        ((a)->s6_addr[0] == 0xff)
  333 
  334 #ifdef _KERNEL  /* XXX nonstandard */
  335 #define IPV6_ADDR_MC_SCOPE(a)           ((a)->s6_addr[1] & 0x0f)
  336 #else
  337 #define __IPV6_ADDR_MC_SCOPE(a)         ((a)->s6_addr[1] & 0x0f)
  338 #endif
  339 
  340 /*
  341  * Multicast Scope
  342  */
  343 #ifdef _KERNEL  /* refers nonstandard items */
  344 #define IN6_IS_ADDR_MC_NODELOCAL(a)     \
  345         (IN6_IS_ADDR_MULTICAST(a) &&    \
  346          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_NODELOCAL))
  347 #define IN6_IS_ADDR_MC_INTFACELOCAL(a)  \
  348         (IN6_IS_ADDR_MULTICAST(a) &&    \
  349          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_INTFACELOCAL))
  350 #define IN6_IS_ADDR_MC_LINKLOCAL(a)     \
  351         (IN6_IS_ADDR_MULTICAST(a) &&    \
  352          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_LINKLOCAL))
  353 #define IN6_IS_ADDR_MC_SITELOCAL(a)     \
  354         (IN6_IS_ADDR_MULTICAST(a) &&    \
  355          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_SITELOCAL))
  356 #define IN6_IS_ADDR_MC_ORGLOCAL(a)      \
  357         (IN6_IS_ADDR_MULTICAST(a) &&    \
  358          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_ORGLOCAL))
  359 #define IN6_IS_ADDR_MC_GLOBAL(a)        \
  360         (IN6_IS_ADDR_MULTICAST(a) &&    \
  361          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_GLOBAL))
  362 #else
  363 #define IN6_IS_ADDR_MC_NODELOCAL(a)     \
  364         (IN6_IS_ADDR_MULTICAST(a) &&    \
  365          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_NODELOCAL))
  366 #define IN6_IS_ADDR_MC_LINKLOCAL(a)     \
  367         (IN6_IS_ADDR_MULTICAST(a) &&    \
  368          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_LINKLOCAL))
  369 #define IN6_IS_ADDR_MC_SITELOCAL(a)     \
  370         (IN6_IS_ADDR_MULTICAST(a) &&    \
  371          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_SITELOCAL))
  372 #define IN6_IS_ADDR_MC_ORGLOCAL(a)      \
  373         (IN6_IS_ADDR_MULTICAST(a) &&    \
  374          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_ORGLOCAL))
  375 #define IN6_IS_ADDR_MC_GLOBAL(a)        \
  376         (IN6_IS_ADDR_MULTICAST(a) &&    \
  377          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_GLOBAL))
  378 #endif
  379 
  380 #ifdef _KERNEL  /* nonstandard */
  381 /*
  382  * KAME Scope
  383  */
  384 #define IN6_IS_SCOPE_LINKLOCAL(a)       \
  385         ((IN6_IS_ADDR_LINKLOCAL(a)) ||  \
  386          (IN6_IS_ADDR_MC_LINKLOCAL(a)))
  387 
  388 #define IFA6_IS_DEPRECATED(a) \
  389         ((a)->ia6_lifetime.ia6t_preferred != 0 && \
  390          (a)->ia6_lifetime.ia6t_preferred < time_second)
  391 #define IFA6_IS_INVALID(a) \
  392         ((a)->ia6_lifetime.ia6t_expire != 0 && \
  393          (a)->ia6_lifetime.ia6t_expire < time_second)
  394 #endif /* _KERNEL */
  395 
  396 /*
  397  * IP6 route structure
  398  */
  399 #if __BSD_VISIBLE
  400 struct route_in6 {
  401         struct  rtentry *ro_rt;
  402         struct  sockaddr_in6 ro_dst;
  403 };
  404 #endif
  405 
  406 /*
  407  * Options for use with [gs]etsockopt at the IPV6 level.
  408  * First word of comment is data type; bool is stored in int.
  409  */
  410 /* no hdrincl */
  411 #if 0 /* the followings are relic in IPv4 and hence are disabled */
  412 #define IPV6_OPTIONS            1  /* buf/ip6_opts; set/get IP6 options */
  413 #define IPV6_RECVOPTS           5  /* bool; receive all IP6 opts w/dgram */
  414 #define IPV6_RECVRETOPTS        6  /* bool; receive IP6 opts for response */
  415 #define IPV6_RECVDSTADDR        7  /* bool; receive IP6 dst addr w/dgram */
  416 #define IPV6_RETOPTS            8  /* ip6_opts; set/get IP6 options */
  417 #endif
  418 #define IPV6_SOCKOPT_RESERVED1  3  /* reserved for future use */
  419 #define IPV6_UNICAST_HOPS       4  /* int; IP6 hops */
  420 #define IPV6_MULTICAST_IF       9  /* u_int; set/get IP6 multicast i/f  */
  421 #define IPV6_MULTICAST_HOPS     10 /* int; set/get IP6 multicast hops */
  422 #define IPV6_MULTICAST_LOOP     11 /* u_int; set/get IP6 multicast loopback */
  423 #define IPV6_JOIN_GROUP         12 /* ip6_mreq; join a group membership */
  424 #define IPV6_LEAVE_GROUP        13 /* ip6_mreq; leave a group membership */
  425 #define IPV6_PORTRANGE          14 /* int; range to choose for unspec port */
  426 #define ICMP6_FILTER            18 /* icmp6_filter; icmp6 filter */
  427 /* RFC2292 options */
  428 #ifdef _KERNEL
  429 #define IPV6_2292PKTINFO        19 /* bool; send/recv if, src/dst addr */
  430 #define IPV6_2292HOPLIMIT       20 /* bool; hop limit */
  431 #define IPV6_2292NEXTHOP        21 /* bool; next hop addr */
  432 #define IPV6_2292HOPOPTS        22 /* bool; hop-by-hop option */
  433 #define IPV6_2292DSTOPTS        23 /* bool; destinaion option */
  434 #define IPV6_2292RTHDR          24 /* bool; routing header */
  435 #define IPV6_2292PKTOPTIONS     25 /* buf/cmsghdr; set/get IPv6 options */
  436 #endif
  437 
  438 #define IPV6_CHECKSUM           26 /* int; checksum offset for raw socket */
  439 #define IPV6_V6ONLY             27 /* bool; make AF_INET6 sockets v6 only */
  440 #ifndef _KERNEL
  441 #define IPV6_BINDV6ONLY         IPV6_V6ONLY
  442 #endif
  443 
  444 #if 1 /* IPSEC */
  445 #define IPV6_IPSEC_POLICY       28 /* struct; get/set security policy */
  446 #endif
  447 #define IPV6_FAITH              29 /* bool; accept FAITH'ed connections */
  448 
  449 #if 1 /* IPV6FIREWALL */
  450 #define IPV6_FW_ADD             30 /* add a firewall rule to chain */
  451 #define IPV6_FW_DEL             31 /* delete a firewall rule from chain */
  452 #define IPV6_FW_FLUSH           32 /* flush firewall rule chain */
  453 #define IPV6_FW_ZERO            33 /* clear single/all firewall counter(s) */
  454 #define IPV6_FW_GET             34 /* get entire firewall rule chain */
  455 #endif
  456 
  457 /* new socket options introduced in RFC2292bis */
  458 #define IPV6_RTHDRDSTOPTS       35 /* ip6_dest; send dst option before rthdr */
  459 
  460 #define IPV6_RECVPKTINFO        36 /* bool; recv if, dst addr */
  461 #define IPV6_RECVHOPLIMIT       37 /* bool; recv hop limit */
  462 #define IPV6_RECVRTHDR          38 /* bool; recv routing header */
  463 #define IPV6_RECVHOPOPTS        39 /* bool; recv hop-by-hop option */
  464 #define IPV6_RECVDSTOPTS        40 /* bool; recv dst option after rthdr */
  465 #ifdef _KERNEL
  466 #define IPV6_RECVRTHDRDSTOPTS   41 /* bool; recv dst option before rthdr */
  467 #endif
  468 
  469 #define IPV6_USE_MIN_MTU        42 /* bool; send packets at the minimum MTU */
  470 #define IPV6_RECVPATHMTU        43 /* bool; notify an according MTU */
  471 
  472 #define IPV6_PATHMTU            44 /* mtuinfo; get the current path MTU (sopt),
  473                                       4 bytes int; MTU notification (cmsg) */
  474 #if 0 /*obsoleted during 2292bis -> 3542*/
  475 #define IPV6_REACHCONF          45 /* no data; ND reachability confirm
  476                                       (cmsg only/not in of RFC3542) */
  477 #endif
  478 
  479 /* more new socket options introduced in RFC2292bis */
  480 #define IPV6_PKTINFO            46 /* in6_pktinfo; send if, src addr */
  481 #define IPV6_HOPLIMIT           47 /* int; send hop limit */
  482 #define IPV6_NEXTHOP            48 /* sockaddr; next hop addr */
  483 #define IPV6_HOPOPTS            49 /* ip6_hbh; send hop-by-hop option */
  484 #define IPV6_DSTOPTS            50 /* ip6_dest; send dst option befor rthdr */
  485 #define IPV6_RTHDR              51 /* ip6_rthdr; send routing header */
  486 #if 0
  487 #define IPV6_PKTOPTIONS         52 /* buf/cmsghdr; set/get IPv6 options */
  488                                    /* obsoleted by 2292bis */
  489 #endif
  490 
  491 #define IPV6_RECVTCLASS         57 /* bool; recv traffic class values */
  492 
  493 #define IPV6_AUTOFLOWLABEL      59 /* bool; attach flowlabel automagically */
  494 
  495 #define IPV6_TCLASS             61 /* int; send traffic class value */
  496 #define IPV6_DONTFRAG           62 /* bool; disable IPv6 fragmentation */
  497 
  498 #define IPV6_PREFER_TEMPADDR    63 /* int; prefer temporary addresses as
  499                                     * the source address.
  500                                     */
  501 
  502 /* to define items, should talk with KAME guys first, for *BSD compatibility */
  503 
  504 #define IPV6_RTHDR_LOOSE     0 /* this hop need not be a neighbor. XXX old spec */
  505 #define IPV6_RTHDR_STRICT    1 /* this hop must be a neighbor. XXX old spec */
  506 #define IPV6_RTHDR_TYPE_0    0 /* IPv6 routing header type 0 */
  507 
  508 /*
  509  * Defaults and limits for options
  510  */
  511 #define IPV6_DEFAULT_MULTICAST_HOPS 1   /* normally limit m'casts to 1 hop */
  512 #define IPV6_DEFAULT_MULTICAST_LOOP 1   /* normally hear sends if a member */
  513 
  514 /*
  515  * Argument structure for IPV6_JOIN_GROUP and IPV6_LEAVE_GROUP.
  516  */
  517 struct ipv6_mreq {
  518         struct in6_addr ipv6mr_multiaddr;
  519         unsigned int    ipv6mr_interface;
  520 };
  521 
  522 /*
  523  * IPV6_PKTINFO: Packet information(RFC2292 sec 5)
  524  */
  525 struct in6_pktinfo {
  526         struct in6_addr ipi6_addr;      /* src/dst IPv6 address */
  527         unsigned int    ipi6_ifindex;   /* send/recv interface index */
  528 };
  529 
  530 /*
  531  * Control structure for IPV6_RECVPATHMTU socket option.
  532  */
  533 struct ip6_mtuinfo {
  534         struct sockaddr_in6 ip6m_addr;  /* or sockaddr_storage? */
  535         uint32_t ip6m_mtu;
  536 };
  537 
  538 /*
  539  * Argument for IPV6_PORTRANGE:
  540  * - which range to search when port is unspecified at bind() or connect()
  541  */
  542 #define IPV6_PORTRANGE_DEFAULT  0       /* default range */
  543 #define IPV6_PORTRANGE_HIGH     1       /* "high" - request firewall bypass */
  544 #define IPV6_PORTRANGE_LOW      2       /* "low" - vouchsafe security */
  545 
  546 #if __BSD_VISIBLE
  547 /*
  548  * Definitions for inet6 sysctl operations.
  549  *
  550  * Third level is protocol number.
  551  * Fourth level is desired variable within that protocol.
  552  */
  553 #define IPV6PROTO_MAXID (IPPROTO_PIM + 1)       /* don't list to IPV6PROTO_MAX */
  554 
  555 /*
  556  * Names for IP sysctl objects
  557  */
  558 #define IPV6CTL_FORWARDING      1       /* act as router */
  559 #define IPV6CTL_SENDREDIRECTS   2       /* may send redirects when forwarding*/
  560 #define IPV6CTL_DEFHLIM         3       /* default Hop-Limit */
  561 #ifdef notyet
  562 #define IPV6CTL_DEFMTU          4       /* default MTU */
  563 #endif
  564 #define IPV6CTL_FORWSRCRT       5       /* forward source-routed dgrams */
  565 #define IPV6CTL_STATS           6       /* stats */
  566 #define IPV6CTL_MRTSTATS        7       /* multicast forwarding stats */
  567 #define IPV6CTL_MRTPROTO        8       /* multicast routing protocol */
  568 #define IPV6CTL_MAXFRAGPACKETS  9       /* max packets reassembly queue */
  569 #define IPV6CTL_SOURCECHECK     10      /* verify source route and intf */
  570 #define IPV6CTL_SOURCECHECK_LOGINT 11   /* minimume logging interval */
  571 #define IPV6CTL_ACCEPT_RTADV    12
  572 #define IPV6CTL_KEEPFAITH       13
  573 #define IPV6CTL_LOG_INTERVAL    14
  574 #define IPV6CTL_HDRNESTLIMIT    15
  575 #define IPV6CTL_DAD_COUNT       16
  576 #define IPV6CTL_AUTO_FLOWLABEL  17
  577 #define IPV6CTL_DEFMCASTHLIM    18
  578 #define IPV6CTL_GIF_HLIM        19      /* default HLIM for gif encap packet */
  579 #define IPV6CTL_KAME_VERSION    20
  580 #define IPV6CTL_USE_DEPRECATED  21      /* use deprecated addr (RFC2462 5.5.4) */
  581 #define IPV6CTL_RR_PRUNE        22      /* walk timer for router renumbering */
  582 #if 0   /* obsolete */
  583 #define IPV6CTL_MAPPED_ADDR     23
  584 #endif
  585 #define IPV6CTL_V6ONLY          24
  586 #define IPV6CTL_RTEXPIRE        25      /* cloned route expiration time */
  587 #define IPV6CTL_RTMINEXPIRE     26      /* min value for expiration time */
  588 #define IPV6CTL_RTMAXCACHE      27      /* trigger level for dynamic expire */
  589 
  590 #define IPV6CTL_USETEMPADDR     32      /* use temporary addresses (RFC3041) */
  591 #define IPV6CTL_TEMPPLTIME      33      /* preferred lifetime for tmpaddrs */
  592 #define IPV6CTL_TEMPVLTIME      34      /* valid lifetime for tmpaddrs */
  593 #define IPV6CTL_AUTO_LINKLOCAL  35      /* automatic link-local addr assign */
  594 #define IPV6CTL_RIP6STATS       36      /* raw_ip6 stats */
  595 #define IPV6CTL_PREFER_TEMPADDR 37      /* prefer temporary addr as src */
  596 #define IPV6CTL_ADDRCTLPOLICY   38      /* get/set address selection policy */
  597 
  598 #define IPV6CTL_MAXFRAGS        41      /* max fragments */
  599 
  600 /* New entries should be added here from current IPV6CTL_MAXID value. */
  601 /* to define items, should talk with KAME guys first, for *BSD compatibility */
  602 #define IPV6CTL_MAXID           42
  603 #endif /* __BSD_VISIBLE */
  604 
  605 /*
  606  * Redefinition of mbuf flags
  607  */
  608 #define M_AUTHIPHDR     M_PROTO2
  609 #define M_DECRYPTED     M_PROTO3
  610 #define M_LOOP          M_PROTO4
  611 #define M_AUTHIPDGM     M_PROTO5
  612 
  613 #ifdef _KERNEL
  614 struct cmsghdr;
  615 
  616 int     in6_cksum __P((struct mbuf *, u_int8_t, u_int32_t, u_int32_t));
  617 int     in6_localaddr __P((struct in6_addr *));
  618 int     in6_addrscope __P((struct in6_addr *));
  619 struct  in6_ifaddr *in6_ifawithifp __P((struct ifnet *, struct in6_addr *));
  620 extern void in6_if_up __P((struct ifnet *));
  621 struct sockaddr;
  622 extern  u_char  ip6_protox[];
  623 
  624 void    in6_sin6_2_sin __P((struct sockaddr_in *sin,
  625                             struct sockaddr_in6 *sin6));
  626 void    in6_sin_2_v4mapsin6 __P((struct sockaddr_in *sin,
  627                                  struct sockaddr_in6 *sin6));
  628 void    in6_sin6_2_sin_in_sock __P((struct sockaddr *nam));
  629 void    in6_sin_2_v4mapsin6_in_sock __P((struct sockaddr **nam));
  630 extern void addrsel_policy_init __P((void));
  631 
  632 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
  633 #define sin6tosa(sin6)  ((struct sockaddr *)(sin6))
  634 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
  635 
  636 extern int      (*faithprefix_p)(struct in6_addr *);
  637 #endif /* _KERNEL */
  638 
  639 #ifndef _SIZE_T_DECLARED
  640 typedef __size_t        size_t;
  641 #define _SIZE_T_DECLARED
  642 #endif
  643 
  644 #ifndef _SOCKLEN_T_DECLARED
  645 typedef __socklen_t     socklen_t;
  646 #define _SOCKLEN_T_DECLARED
  647 #endif
  648 
  649 #if __BSD_VISIBLE
  650 
  651 __BEGIN_DECLS
  652 struct cmsghdr;
  653 
  654 extern int inet6_option_space __P((int));
  655 extern int inet6_option_init __P((void *, struct cmsghdr **, int));
  656 extern int inet6_option_append __P((struct cmsghdr *, const uint8_t *,
  657         int, int));
  658 extern uint8_t *inet6_option_alloc __P((struct cmsghdr *, int, int, int));
  659 extern int inet6_option_next __P((const struct cmsghdr *, uint8_t **));
  660 extern int inet6_option_find __P((const struct cmsghdr *, uint8_t **, int));
  661 
  662 extern size_t inet6_rthdr_space __P((int, int));
  663 extern struct cmsghdr *inet6_rthdr_init __P((void *, int));
  664 extern int inet6_rthdr_add __P((struct cmsghdr *, const struct in6_addr *,
  665         unsigned int));
  666 extern int inet6_rthdr_lasthop __P((struct cmsghdr *, unsigned int));
  667 #if 0 /* not implemented yet */
  668 extern int inet6_rthdr_reverse __P((const struct cmsghdr *, struct cmsghdr *));
  669 #endif
  670 extern int inet6_rthdr_segments __P((const struct cmsghdr *));
  671 extern struct in6_addr *inet6_rthdr_getaddr __P((struct cmsghdr *, int));
  672 extern int inet6_rthdr_getflags __P((const struct cmsghdr *, int));
  673 
  674 extern int inet6_opt_init __P((void *, socklen_t));
  675 extern int inet6_opt_append __P((void *, socklen_t, int, uint8_t, socklen_t,
  676         uint8_t, void **));
  677 extern int inet6_opt_finish __P((void *, socklen_t, int));
  678 extern int inet6_opt_set_val __P((void *, int, void *, socklen_t));
  679 
  680 extern int inet6_opt_next __P((void *, socklen_t, int, uint8_t *, socklen_t *,
  681         void **));
  682 extern int inet6_opt_find __P((void *, socklen_t, int, uint8_t, socklen_t *,
  683         void **));
  684 extern int inet6_opt_get_val __P((void *, int, void *, socklen_t));
  685 extern socklen_t inet6_rth_space __P((int, int));
  686 extern void *inet6_rth_init __P((void *, socklen_t, int, int));
  687 extern int inet6_rth_add __P((void *, const struct in6_addr *));
  688 extern int inet6_rth_reverse __P((const void *, void *));
  689 extern int inet6_rth_segments __P((const void *));
  690 extern struct in6_addr *inet6_rth_getaddr __P((const void *, int));
  691 __END_DECLS
  692 
  693 #endif /* __BSD_VISIBLE */
  694 
  695 #endif /* !_NETINET6_IN6_H_ */

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