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  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the project nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  *      $KAME: in6.h,v 1.89 2001/05/27 13:28:35 itojun Exp $
   32  */
   33 
   34 /*-
   35  * Copyright (c) 1982, 1986, 1990, 1993
   36  *      The Regents of the University of California.  All rights reserved.
   37  *
   38  * Redistribution and use in source and binary forms, with or without
   39  * modification, are permitted provided that the following conditions
   40  * are met:
   41  * 1. Redistributions of source code must retain the above copyright
   42  *    notice, this list of conditions and the following disclaimer.
   43  * 2. Redistributions in binary form must reproduce the above copyright
   44  *    notice, this list of conditions and the following disclaimer in the
   45  *    documentation and/or other materials provided with the distribution.
   46  * 3. Neither the name of the University nor the names of its contributors
   47  *    may be used to endorse or promote products derived from this software
   48  *    without specific prior written permission.
   49  *
   50  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   51  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   53  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   54  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   55  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   56  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   57  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   58  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   59  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   60  * SUCH DAMAGE.
   61  *
   62  *      @(#)in.h        8.3 (Berkeley) 1/3/94
   63  * $FreeBSD: releng/12.0/sys/netinet6/in6.h 337783 2018-08-14 17:27:41Z jtl $
   64  */
   65 
   66 #ifndef __KAME_NETINET_IN_H_INCLUDED_
   67 #error "do not include netinet6/in6.h directly, include netinet/in.h.  see RFC2553"
   68 #endif
   69 
   70 #ifndef _NETINET6_IN6_H_
   71 #define _NETINET6_IN6_H_
   72 
   73 /*
   74  * Identification of the network protocol stack
   75  * for *BSD-current/release: http://www.kame.net/dev/cvsweb.cgi/kame/COVERAGE
   76  * has the table of implementation/integration differences.
   77  */
   78 #define __KAME__
   79 #define __KAME_VERSION          "FreeBSD"
   80 
   81 /*
   82  * IPv6 port allocation rules should mirror the IPv4 rules and are controlled
   83  * by the net.inet.ip.portrange sysctl tree. The following defines exist
   84  * for compatibility with userland applications that need them.
   85  */
   86 #if __BSD_VISIBLE
   87 #define IPV6PORT_RESERVED       1024
   88 #define IPV6PORT_ANONMIN        49152
   89 #define IPV6PORT_ANONMAX        65535
   90 #define IPV6PORT_RESERVEDMIN    600
   91 #define IPV6PORT_RESERVEDMAX    (IPV6PORT_RESERVED-1)
   92 #endif
   93 
   94 /*
   95  * IPv6 address
   96  */
   97 struct in6_addr {
   98         union {
   99                 uint8_t         __u6_addr8[16];
  100                 uint16_t        __u6_addr16[8];
  101                 uint32_t        __u6_addr32[4];
  102         } __u6_addr;                    /* 128-bit IP6 address */
  103 };
  104 
  105 #define s6_addr   __u6_addr.__u6_addr8
  106 #ifdef _KERNEL  /* XXX nonstandard */
  107 #define s6_addr8  __u6_addr.__u6_addr8
  108 #define s6_addr16 __u6_addr.__u6_addr16
  109 #define s6_addr32 __u6_addr.__u6_addr32
  110 #endif
  111 
  112 #define INET6_ADDRSTRLEN        46
  113 
  114 /*
  115  * XXX missing POSIX.1-2001 macro IPPROTO_IPV6.
  116  */
  117 
  118 /*
  119  * Socket address for IPv6
  120  */
  121 #if __BSD_VISIBLE
  122 #define SIN6_LEN
  123 #endif
  124 
  125 struct sockaddr_in6 {
  126         uint8_t         sin6_len;       /* length of this struct */
  127         sa_family_t     sin6_family;    /* AF_INET6 */
  128         in_port_t       sin6_port;      /* Transport layer port # */
  129         uint32_t        sin6_flowinfo;  /* IP6 flow information */
  130         struct in6_addr sin6_addr;      /* IP6 address */
  131         uint32_t        sin6_scope_id;  /* scope zone index */
  132 };
  133 
  134 /*
  135  * Local definition for masks
  136  */
  137 #ifdef _KERNEL  /* XXX nonstandard */
  138 #define IN6MASK0        {{{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }}}
  139 #define IN6MASK32       {{{ 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, \
  140                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
  141 #define IN6MASK64       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
  142                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
  143 #define IN6MASK96       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
  144                             0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00 }}}
  145 #define IN6MASK128      {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
  146                             0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}}
  147 #endif
  148 
  149 #ifdef _KERNEL
  150 extern const struct sockaddr_in6 sa6_any;
  151 
  152 extern const struct in6_addr in6mask0;
  153 extern const struct in6_addr in6mask32;
  154 extern const struct in6_addr in6mask64;
  155 extern const struct in6_addr in6mask96;
  156 extern const struct in6_addr in6mask128;
  157 #endif /* _KERNEL */
  158 
  159 /*
  160  * Macros started with IPV6_ADDR is KAME local
  161  */
  162 #ifdef _KERNEL  /* XXX nonstandard */
  163 #if _BYTE_ORDER == _BIG_ENDIAN
  164 #define IPV6_ADDR_INT32_ONE     1
  165 #define IPV6_ADDR_INT32_TWO     2
  166 #define IPV6_ADDR_INT32_MNL     0xff010000
  167 #define IPV6_ADDR_INT32_MLL     0xff020000
  168 #define IPV6_ADDR_INT32_SMP     0x0000ffff
  169 #define IPV6_ADDR_INT16_ULL     0xfe80
  170 #define IPV6_ADDR_INT16_USL     0xfec0
  171 #define IPV6_ADDR_INT16_MLL     0xff02
  172 #elif _BYTE_ORDER == _LITTLE_ENDIAN
  173 #define IPV6_ADDR_INT32_ONE     0x01000000
  174 #define IPV6_ADDR_INT32_TWO     0x02000000
  175 #define IPV6_ADDR_INT32_MNL     0x000001ff
  176 #define IPV6_ADDR_INT32_MLL     0x000002ff
  177 #define IPV6_ADDR_INT32_SMP     0xffff0000
  178 #define IPV6_ADDR_INT16_ULL     0x80fe
  179 #define IPV6_ADDR_INT16_USL     0xc0fe
  180 #define IPV6_ADDR_INT16_MLL     0x02ff
  181 #endif
  182 #endif
  183 
  184 /*
  185  * Definition of some useful macros to handle IP6 addresses
  186  */
  187 #if __BSD_VISIBLE
  188 #define IN6ADDR_ANY_INIT \
  189         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  190             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
  191 #define IN6ADDR_LOOPBACK_INIT \
  192         {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  193             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
  194 #define IN6ADDR_NODELOCAL_ALLNODES_INIT \
  195         {{{ 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  196             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
  197 #define IN6ADDR_INTFACELOCAL_ALLNODES_INIT \
  198         {{{ 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  199             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
  200 #define IN6ADDR_LINKLOCAL_ALLNODES_INIT \
  201         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  202             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
  203 #define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \
  204         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  205             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}}
  206 #define IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT \
  207         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  208             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x16 }}}
  209 #endif
  210 
  211 extern const struct in6_addr in6addr_any;
  212 extern const struct in6_addr in6addr_loopback;
  213 #if __BSD_VISIBLE
  214 extern const struct in6_addr in6addr_nodelocal_allnodes;
  215 extern const struct in6_addr in6addr_linklocal_allnodes;
  216 extern const struct in6_addr in6addr_linklocal_allrouters;
  217 extern const struct in6_addr in6addr_linklocal_allv2routers;
  218 #endif
  219 
  220 /*
  221  * Equality
  222  * NOTE: Some of kernel programming environment (for example, openbsd/sparc)
  223  * does not supply memcmp().  For userland memcmp() is preferred as it is
  224  * in ANSI standard.
  225  */
  226 #ifdef _KERNEL
  227 #define IN6_ARE_ADDR_EQUAL(a, b)                        \
  228     (bcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
  229 #else
  230 #if __BSD_VISIBLE
  231 #define IN6_ARE_ADDR_EQUAL(a, b)                        \
  232     (memcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
  233 #endif
  234 #endif
  235 
  236 /*
  237  * Unspecified
  238  */
  239 #define IN6_IS_ADDR_UNSPECIFIED(a)      \
  240         ((a)->__u6_addr.__u6_addr32[0] == 0 &&  \
  241          (a)->__u6_addr.__u6_addr32[1] == 0 &&  \
  242          (a)->__u6_addr.__u6_addr32[2] == 0 &&  \
  243          (a)->__u6_addr.__u6_addr32[3] == 0)
  244 
  245 /*
  246  * Loopback
  247  */
  248 #define IN6_IS_ADDR_LOOPBACK(a)         \
  249         ((a)->__u6_addr.__u6_addr32[0] == 0 &&  \
  250          (a)->__u6_addr.__u6_addr32[1] == 0 &&  \
  251          (a)->__u6_addr.__u6_addr32[2] == 0 &&  \
  252          (a)->__u6_addr.__u6_addr32[3] == ntohl(1))
  253 
  254 /*
  255  * IPv4 compatible
  256  */
  257 #define IN6_IS_ADDR_V4COMPAT(a)         \
  258         ((a)->__u6_addr.__u6_addr32[0] == 0 &&  \
  259          (a)->__u6_addr.__u6_addr32[1] == 0 &&  \
  260          (a)->__u6_addr.__u6_addr32[2] == 0 &&  \
  261          (a)->__u6_addr.__u6_addr32[3] != 0 &&  \
  262          (a)->__u6_addr.__u6_addr32[3] != ntohl(1))
  263 
  264 /*
  265  * Mapped
  266  */
  267 #define IN6_IS_ADDR_V4MAPPED(a)               \
  268         ((a)->__u6_addr.__u6_addr32[0] == 0 &&  \
  269          (a)->__u6_addr.__u6_addr32[1] == 0 &&  \
  270          (a)->__u6_addr.__u6_addr32[2] == ntohl(0x0000ffff))
  271 
  272 /*
  273  * KAME Scope Values
  274  */
  275 
  276 #ifdef _KERNEL  /* XXX nonstandard */
  277 #define IPV6_ADDR_SCOPE_NODELOCAL       0x01
  278 #define IPV6_ADDR_SCOPE_INTFACELOCAL    0x01
  279 #define IPV6_ADDR_SCOPE_LINKLOCAL       0x02
  280 #define IPV6_ADDR_SCOPE_SITELOCAL       0x05
  281 #define IPV6_ADDR_SCOPE_ORGLOCAL        0x08    /* just used in this file */
  282 #define IPV6_ADDR_SCOPE_GLOBAL          0x0e
  283 #else
  284 #define __IPV6_ADDR_SCOPE_NODELOCAL     0x01
  285 #define __IPV6_ADDR_SCOPE_INTFACELOCAL  0x01
  286 #define __IPV6_ADDR_SCOPE_LINKLOCAL     0x02
  287 #define __IPV6_ADDR_SCOPE_SITELOCAL     0x05
  288 #define __IPV6_ADDR_SCOPE_ORGLOCAL      0x08    /* just used in this file */
  289 #define __IPV6_ADDR_SCOPE_GLOBAL        0x0e
  290 #endif
  291 
  292 /*
  293  * Unicast Scope
  294  * Note that we must check topmost 10 bits only, not 16 bits (see RFC2373).
  295  */
  296 #define IN6_IS_ADDR_LINKLOCAL(a)        \
  297         (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0x80))
  298 #define IN6_IS_ADDR_SITELOCAL(a)        \
  299         (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0xc0))
  300 
  301 /*
  302  * Multicast
  303  */
  304 #define IN6_IS_ADDR_MULTICAST(a)        ((a)->s6_addr[0] == 0xff)
  305 
  306 #ifdef _KERNEL  /* XXX nonstandard */
  307 #define IPV6_ADDR_MC_SCOPE(a)           ((a)->s6_addr[1] & 0x0f)
  308 #else
  309 #define __IPV6_ADDR_MC_SCOPE(a)         ((a)->s6_addr[1] & 0x0f)
  310 #endif
  311 
  312 /*
  313  * Multicast Scope
  314  */
  315 #ifdef _KERNEL  /* refers nonstandard items */
  316 #define IN6_IS_ADDR_MC_NODELOCAL(a)     \
  317         (IN6_IS_ADDR_MULTICAST(a) &&    \
  318          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_NODELOCAL))
  319 #define IN6_IS_ADDR_MC_INTFACELOCAL(a)  \
  320         (IN6_IS_ADDR_MULTICAST(a) &&    \
  321          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_INTFACELOCAL))
  322 #define IN6_IS_ADDR_MC_LINKLOCAL(a)     \
  323         (IN6_IS_ADDR_MULTICAST(a) &&    \
  324          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_LINKLOCAL))
  325 #define IN6_IS_ADDR_MC_SITELOCAL(a)     \
  326         (IN6_IS_ADDR_MULTICAST(a) &&    \
  327          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_SITELOCAL))
  328 #define IN6_IS_ADDR_MC_ORGLOCAL(a)      \
  329         (IN6_IS_ADDR_MULTICAST(a) &&    \
  330          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_ORGLOCAL))
  331 #define IN6_IS_ADDR_MC_GLOBAL(a)        \
  332         (IN6_IS_ADDR_MULTICAST(a) &&    \
  333          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_GLOBAL))
  334 #else
  335 #define IN6_IS_ADDR_MC_NODELOCAL(a)     \
  336         (IN6_IS_ADDR_MULTICAST(a) &&    \
  337          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_NODELOCAL))
  338 #define IN6_IS_ADDR_MC_LINKLOCAL(a)     \
  339         (IN6_IS_ADDR_MULTICAST(a) &&    \
  340          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_LINKLOCAL))
  341 #define IN6_IS_ADDR_MC_SITELOCAL(a)     \
  342         (IN6_IS_ADDR_MULTICAST(a) &&    \
  343          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_SITELOCAL))
  344 #define IN6_IS_ADDR_MC_ORGLOCAL(a)      \
  345         (IN6_IS_ADDR_MULTICAST(a) &&    \
  346          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_ORGLOCAL))
  347 #define IN6_IS_ADDR_MC_GLOBAL(a)        \
  348         (IN6_IS_ADDR_MULTICAST(a) &&    \
  349          (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_GLOBAL))
  350 #endif
  351 
  352 #ifdef _KERNEL  /* nonstandard */
  353 /*
  354  * KAME Scope
  355  */
  356 #define IN6_IS_SCOPE_LINKLOCAL(a)       \
  357         ((IN6_IS_ADDR_LINKLOCAL(a)) ||  \
  358          (IN6_IS_ADDR_MC_LINKLOCAL(a)))
  359 #define IN6_IS_SCOPE_EMBED(a)                   \
  360         ((IN6_IS_ADDR_LINKLOCAL(a)) ||          \
  361          (IN6_IS_ADDR_MC_LINKLOCAL(a)) ||       \
  362          (IN6_IS_ADDR_MC_INTFACELOCAL(a)))
  363 
  364 #define IFA6_IS_DEPRECATED(a) \
  365         ((a)->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME && \
  366          (u_int32_t)((time_uptime - (a)->ia6_updatetime)) > \
  367          (a)->ia6_lifetime.ia6t_pltime)
  368 #define IFA6_IS_INVALID(a) \
  369         ((a)->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME && \
  370          (u_int32_t)((time_uptime - (a)->ia6_updatetime)) > \
  371          (a)->ia6_lifetime.ia6t_vltime)
  372 #endif /* _KERNEL */
  373 
  374 /*
  375  * IP6 route structure
  376  */
  377 #if __BSD_VISIBLE
  378 struct route_in6 {
  379         struct  rtentry *ro_rt;
  380         struct  llentry *ro_lle;
  381         /*
  382          * ro_prepend and ro_plen are only used for bpf to pass in a
  383          * preformed header.  They are not cacheable.
  384          */
  385         char            *ro_prepend;
  386         uint16_t        ro_plen;
  387         uint16_t        ro_flags;
  388         uint16_t        ro_mtu; /* saved ro_rt mtu */
  389         uint16_t        spare;
  390         struct  sockaddr_in6 ro_dst;
  391 };
  392 #endif
  393 
  394 #ifdef _KERNEL
  395 #define MTAG_ABI_IPV6           1444287380      /* IPv6 ABI */
  396 #define IPV6_TAG_DIRECT         0               /* direct-dispatch IPv6 */
  397 #endif /* _KERNEL */
  398 
  399 /*
  400  * Options for use with [gs]etsockopt at the IPV6 level.
  401  * First word of comment is data type; bool is stored in int.
  402  */
  403 /* no hdrincl */
  404 #if 0 /* the followings are relic in IPv4 and hence are disabled */
  405 #define IPV6_OPTIONS            1  /* buf/ip6_opts; set/get IP6 options */
  406 #define IPV6_RECVOPTS           5  /* bool; receive all IP6 opts w/dgram */
  407 #define IPV6_RECVRETOPTS        6  /* bool; receive IP6 opts for response */
  408 #define IPV6_RECVDSTADDR        7  /* bool; receive IP6 dst addr w/dgram */
  409 #define IPV6_RETOPTS            8  /* ip6_opts; set/get IP6 options */
  410 #endif
  411 #define IPV6_SOCKOPT_RESERVED1  3  /* reserved for future use */
  412 #define IPV6_UNICAST_HOPS       4  /* int; IP6 hops */
  413 #define IPV6_MULTICAST_IF       9  /* u_int; set/get IP6 multicast i/f  */
  414 #define IPV6_MULTICAST_HOPS     10 /* int; set/get IP6 multicast hops */
  415 #define IPV6_MULTICAST_LOOP     11 /* u_int; set/get IP6 multicast loopback */
  416 #define IPV6_JOIN_GROUP         12 /* ipv6_mreq; join a group membership */
  417 #define IPV6_LEAVE_GROUP        13 /* ipv6_mreq; leave a group membership */
  418 #define IPV6_PORTRANGE          14 /* int; range to choose for unspec port */
  419 #define ICMP6_FILTER            18 /* icmp6_filter; icmp6 filter */
  420 /* RFC2292 options */
  421 #ifdef _KERNEL
  422 #define IPV6_2292PKTINFO        19 /* bool; send/recv if, src/dst addr */
  423 #define IPV6_2292HOPLIMIT       20 /* bool; hop limit */
  424 #define IPV6_2292NEXTHOP        21 /* bool; next hop addr */
  425 #define IPV6_2292HOPOPTS        22 /* bool; hop-by-hop option */
  426 #define IPV6_2292DSTOPTS        23 /* bool; destinaion option */
  427 #define IPV6_2292RTHDR          24 /* bool; routing header */
  428 #define IPV6_2292PKTOPTIONS     25 /* buf/cmsghdr; set/get IPv6 options */
  429 #endif
  430 
  431 #define IPV6_CHECKSUM           26 /* int; checksum offset for raw socket */
  432 #define IPV6_V6ONLY             27 /* bool; make AF_INET6 sockets v6 only */
  433 #ifndef _KERNEL
  434 #define IPV6_BINDV6ONLY         IPV6_V6ONLY
  435 #endif
  436 
  437 #define IPV6_IPSEC_POLICY       28 /* struct; get/set security policy */
  438                                    /* 29; unused; was IPV6_FAITH */
  439 #if 1 /* IPV6FIREWALL */
  440 #define IPV6_FW_ADD             30 /* add a firewall rule to chain */
  441 #define IPV6_FW_DEL             31 /* delete a firewall rule from chain */
  442 #define IPV6_FW_FLUSH           32 /* flush firewall rule chain */
  443 #define IPV6_FW_ZERO            33 /* clear single/all firewall counter(s) */
  444 #define IPV6_FW_GET             34 /* get entire firewall rule chain */
  445 #endif
  446 
  447 /* new socket options introduced in RFC3542 */
  448 #define IPV6_RTHDRDSTOPTS       35 /* ip6_dest; send dst option before rthdr */
  449 
  450 #define IPV6_RECVPKTINFO        36 /* bool; recv if, dst addr */
  451 #define IPV6_RECVHOPLIMIT       37 /* bool; recv hop limit */
  452 #define IPV6_RECVRTHDR          38 /* bool; recv routing header */
  453 #define IPV6_RECVHOPOPTS        39 /* bool; recv hop-by-hop option */
  454 #define IPV6_RECVDSTOPTS        40 /* bool; recv dst option after rthdr */
  455 #ifdef _KERNEL
  456 #define IPV6_RECVRTHDRDSTOPTS   41 /* bool; recv dst option before rthdr */
  457 #endif
  458 
  459 #define IPV6_USE_MIN_MTU        42 /* bool; send packets at the minimum MTU */
  460 #define IPV6_RECVPATHMTU        43 /* bool; notify an according MTU */
  461 
  462 #define IPV6_PATHMTU            44 /* mtuinfo; get the current path MTU (sopt),
  463                                       4 bytes int; MTU notification (cmsg) */
  464 #if 0 /*obsoleted during 2292bis -> 3542*/
  465 #define IPV6_REACHCONF          45 /* no data; ND reachability confirm
  466                                       (cmsg only/not in of RFC3542) */
  467 #endif
  468 
  469 /* more new socket options introduced in RFC3542 */
  470 #define IPV6_PKTINFO            46 /* in6_pktinfo; send if, src addr */
  471 #define IPV6_HOPLIMIT           47 /* int; send hop limit */
  472 #define IPV6_NEXTHOP            48 /* sockaddr; next hop addr */
  473 #define IPV6_HOPOPTS            49 /* ip6_hbh; send hop-by-hop option */
  474 #define IPV6_DSTOPTS            50 /* ip6_dest; send dst option befor rthdr */
  475 #define IPV6_RTHDR              51 /* ip6_rthdr; send routing header */
  476 #if 0
  477 #define IPV6_PKTOPTIONS         52 /* buf/cmsghdr; set/get IPv6 options */
  478                                    /* obsoleted by RFC3542 */
  479 #endif
  480 
  481 #define IPV6_RECVTCLASS         57 /* bool; recv traffic class values */
  482 
  483 #define IPV6_AUTOFLOWLABEL      59 /* bool; attach flowlabel automagically */
  484 
  485 #define IPV6_TCLASS             61 /* int; send traffic class value */
  486 #define IPV6_DONTFRAG           62 /* bool; disable IPv6 fragmentation */
  487 
  488 #define IPV6_PREFER_TEMPADDR    63 /* int; prefer temporary addresses as
  489                                     * the source address.
  490                                     */
  491 
  492 #define IPV6_BINDANY            64 /* bool: allow bind to any address */
  493 
  494 #define IPV6_BINDMULTI          65 /* bool; allow multibind to same addr/port */
  495 #define IPV6_RSS_LISTEN_BUCKET  66 /* int; set RSS listen bucket */
  496 #define IPV6_FLOWID             67 /* int; flowid of given socket */
  497 #define IPV6_FLOWTYPE           68 /* int; flowtype of given socket */
  498 #define IPV6_RSSBUCKETID        69 /* int; RSS bucket ID of given socket */
  499 #define IPV6_RECVFLOWID         70 /* bool; receive IP6 flowid/flowtype w/ datagram */
  500 #define IPV6_RECVRSSBUCKETID    71 /* bool; receive IP6 RSS bucket id w/ datagram */
  501 
  502 #define IPV6_ORIGDSTADDR        72 /* bool: allow getting dstaddr /port info */
  503 #define IPV6_RECVORIGDSTADDR    IPV6_ORIGDSTADDR
  504 
  505 /*
  506  * The following option is private; do not use it from user applications.
  507  * It is deliberately defined to the same value as IP_MSFILTER.
  508  */
  509 #define IPV6_MSFILTER           74 /* struct __msfilterreq;
  510                                     * set/get multicast source filter list.
  511                                     */
  512 
  513 /* to define items, should talk with KAME guys first, for *BSD compatibility */
  514 
  515 #define IPV6_RTHDR_LOOSE     0 /* this hop need not be a neighbor. XXX old spec */
  516 #define IPV6_RTHDR_STRICT    1 /* this hop must be a neighbor. XXX old spec */
  517 #define IPV6_RTHDR_TYPE_0    0 /* IPv6 routing header type 0 */
  518 
  519 /*
  520  * Defaults and limits for options
  521  */
  522 #define IPV6_DEFAULT_MULTICAST_HOPS 1   /* normally limit m'casts to 1 hop */
  523 #define IPV6_DEFAULT_MULTICAST_LOOP 1   /* normally hear sends if a member */
  524 
  525 /*
  526  * The im6o_membership vector for each socket is now dynamically allocated at
  527  * run-time, bounded by USHRT_MAX, and is reallocated when needed, sized
  528  * according to a power-of-two increment.
  529  */
  530 #define IPV6_MIN_MEMBERSHIPS    31
  531 #define IPV6_MAX_MEMBERSHIPS    4095
  532 
  533 /*
  534  * Default resource limits for IPv6 multicast source filtering.
  535  * These may be modified by sysctl.
  536  */
  537 #define IPV6_MAX_GROUP_SRC_FILTER       512     /* sources per group */
  538 #define IPV6_MAX_SOCK_SRC_FILTER        128     /* sources per socket/group */
  539 
  540 /*
  541  * Argument structure for IPV6_JOIN_GROUP and IPV6_LEAVE_GROUP.
  542  */
  543 struct ipv6_mreq {
  544         struct in6_addr ipv6mr_multiaddr;
  545         unsigned int    ipv6mr_interface;
  546 };
  547 
  548 /*
  549  * IPV6_PKTINFO: Packet information(RFC2292 sec 5)
  550  */
  551 struct in6_pktinfo {
  552         struct in6_addr ipi6_addr;      /* src/dst IPv6 address */
  553         unsigned int    ipi6_ifindex;   /* send/recv interface index */
  554 };
  555 
  556 /*
  557  * Control structure for IPV6_RECVPATHMTU socket option.
  558  */
  559 struct ip6_mtuinfo {
  560         struct sockaddr_in6 ip6m_addr;  /* or sockaddr_storage? */
  561         uint32_t ip6m_mtu;
  562 };
  563 
  564 /*
  565  * Argument for IPV6_PORTRANGE:
  566  * - which range to search when port is unspecified at bind() or connect()
  567  */
  568 #define IPV6_PORTRANGE_DEFAULT  0       /* default range */
  569 #define IPV6_PORTRANGE_HIGH     1       /* "high" - request firewall bypass */
  570 #define IPV6_PORTRANGE_LOW      2       /* "low" - vouchsafe security */
  571 
  572 #if __BSD_VISIBLE
  573 /*
  574  * Definitions for inet6 sysctl operations.
  575  *
  576  * Third level is protocol number.
  577  * Fourth level is desired variable within that protocol.
  578  */
  579 #define IPV6PROTO_MAXID (IPPROTO_PIM + 1)       /* don't list to IPV6PROTO_MAX */
  580 
  581 /*
  582  * Names for IP sysctl objects
  583  */
  584 #define IPV6CTL_FORWARDING      1       /* act as router */
  585 #define IPV6CTL_SENDREDIRECTS   2       /* may send redirects when forwarding*/
  586 #define IPV6CTL_DEFHLIM         3       /* default Hop-Limit */
  587 #ifdef notyet
  588 #define IPV6CTL_DEFMTU          4       /* default MTU */
  589 #endif
  590 #define IPV6CTL_FORWSRCRT       5       /* forward source-routed dgrams */
  591 #define IPV6CTL_STATS           6       /* stats */
  592 #define IPV6CTL_MRTSTATS        7       /* multicast forwarding stats */
  593 #define IPV6CTL_MRTPROTO        8       /* multicast routing protocol */
  594 #define IPV6CTL_MAXFRAGPACKETS  9       /* max packets reassembly queue */
  595 #define IPV6CTL_SOURCECHECK     10      /* verify source route and intf */
  596 #define IPV6CTL_SOURCECHECK_LOGINT 11   /* minimume logging interval */
  597 #define IPV6CTL_ACCEPT_RTADV    12
  598                                         /* 13; unused; was: IPV6CTL_KEEPFAITH */
  599 #define IPV6CTL_LOG_INTERVAL    14
  600 #define IPV6CTL_HDRNESTLIMIT    15
  601 #define IPV6CTL_DAD_COUNT       16
  602 #define IPV6CTL_AUTO_FLOWLABEL  17
  603 #define IPV6CTL_DEFMCASTHLIM    18
  604 #define IPV6CTL_GIF_HLIM        19      /* default HLIM for gif encap packet */
  605 #define IPV6CTL_KAME_VERSION    20
  606 #define IPV6CTL_USE_DEPRECATED  21      /* use deprecated addr (RFC2462 5.5.4) */
  607 #define IPV6CTL_RR_PRUNE        22      /* walk timer for router renumbering */
  608 #if 0   /* obsolete */
  609 #define IPV6CTL_MAPPED_ADDR     23
  610 #endif
  611 #define IPV6CTL_V6ONLY          24
  612 /*      IPV6CTL_RTEXPIRE        25      deprecated */
  613 /*      IPV6CTL_RTMINEXPIRE     26      deprecated */
  614 /*      IPV6CTL_RTMAXCACHE      27      deprecated */
  615 
  616 #define IPV6CTL_USETEMPADDR     32      /* use temporary addresses (RFC3041) */
  617 #define IPV6CTL_TEMPPLTIME      33      /* preferred lifetime for tmpaddrs */
  618 #define IPV6CTL_TEMPVLTIME      34      /* valid lifetime for tmpaddrs */
  619 #define IPV6CTL_AUTO_LINKLOCAL  35      /* automatic link-local addr assign */
  620 #define IPV6CTL_RIP6STATS       36      /* raw_ip6 stats */
  621 #define IPV6CTL_PREFER_TEMPADDR 37      /* prefer temporary addr as src */
  622 #define IPV6CTL_ADDRCTLPOLICY   38      /* get/set address selection policy */
  623 #define IPV6CTL_USE_DEFAULTZONE 39      /* use default scope zone */
  624 
  625 #define IPV6CTL_MAXFRAGS        41      /* max fragments */
  626 #if 0
  627 #define IPV6CTL_IFQ             42      /* ip6intrq node */
  628 #define IPV6CTL_ISATAPRTR       43      /* isatap router */
  629 #endif
  630 #define IPV6CTL_MCAST_PMTU      44      /* enable pMTU discovery for multicast? */
  631 
  632 /* New entries should be added here from current IPV6CTL_MAXID value. */
  633 /* to define items, should talk with KAME guys first, for *BSD compatibility */
  634 #define IPV6CTL_STEALTH         45
  635 
  636 #define ICMPV6CTL_ND6_ONLINKNSRFC4861   47
  637 #define IPV6CTL_NO_RADR         48      /* No defroute from RA */
  638 #define IPV6CTL_NORBIT_RAIF     49      /* Disable R-bit in NA on RA
  639                                          * receiving IF. */
  640 #define IPV6CTL_RFC6204W3       50      /* Accept defroute even when forwarding
  641                                            enabled */
  642 #define IPV6CTL_INTRQMAXLEN     51      /* max length of IPv6 netisr queue */
  643 #define IPV6CTL_INTRDQMAXLEN    52      /* max length of direct IPv6 netisr
  644                                          * queue */
  645 #define IPV6CTL_MAXFRAGSPERPACKET       53 /* Max fragments per packet */
  646 #define IPV6CTL_MAXFRAGBUCKETSIZE       54 /* Max reassembly queues per bucket */
  647 #define IPV6CTL_MAXID           55
  648 #endif /* __BSD_VISIBLE */
  649 
  650 /*
  651  * Since both netinet/ and netinet6/ call into netipsec/ and netpfil/,
  652  * the protocol specific mbuf flags are shared between them.
  653  */
  654 #define M_FASTFWD_OURS          M_PROTO1        /* changed dst to local */
  655 #define M_IP6_NEXTHOP           M_PROTO2        /* explicit ip nexthop */
  656 #define M_IP_NEXTHOP            M_PROTO2        /* explicit ip nexthop */
  657 #define M_SKIP_FIREWALL         M_PROTO3        /* skip firewall processing */
  658 #define M_AUTHIPHDR             M_PROTO4
  659 #define M_DECRYPTED             M_PROTO5
  660 #define M_LOOP                  M_PROTO6
  661 #define M_AUTHIPDGM             M_PROTO7
  662 #define M_RTALERT_MLD           M_PROTO8
  663 #define M_FRAGMENTED            M_PROTO9        /* contained fragment header */
  664 
  665 #ifdef _KERNEL
  666 struct cmsghdr;
  667 struct ip6_hdr;
  668 
  669 int     in6_cksum_pseudo(struct ip6_hdr *, uint32_t, uint8_t, uint16_t);
  670 int     in6_cksum(struct mbuf *, u_int8_t, u_int32_t, u_int32_t);
  671 int     in6_cksum_partial(struct mbuf *, u_int8_t, u_int32_t, u_int32_t,
  672                           u_int32_t);
  673 int     in6_localaddr(struct in6_addr *);
  674 int     in6_localip(struct in6_addr *);
  675 int     in6_ifhasaddr(struct ifnet *, struct in6_addr *);
  676 int     in6_addrscope(const struct in6_addr *);
  677 char    *ip6_sprintf(char *, const struct in6_addr *);
  678 struct  in6_ifaddr *in6_ifawithifp(struct ifnet *, struct in6_addr *);
  679 extern void in6_if_up(struct ifnet *);
  680 struct sockaddr;
  681 extern  u_char  ip6_protox[];
  682 
  683 void    in6_sin6_2_sin(struct sockaddr_in *sin,
  684                             struct sockaddr_in6 *sin6);
  685 void    in6_sin_2_v4mapsin6(struct sockaddr_in *sin,
  686                                  struct sockaddr_in6 *sin6);
  687 void    in6_sin6_2_sin_in_sock(struct sockaddr *nam);
  688 void    in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam);
  689 extern void addrsel_policy_init(void);
  690 
  691 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
  692 #define sin6tosa(sin6)  ((struct sockaddr *)(sin6))
  693 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
  694 
  695 #endif /* _KERNEL */
  696 
  697 #ifndef _SIZE_T_DECLARED
  698 typedef __size_t        size_t;
  699 #define _SIZE_T_DECLARED
  700 #endif
  701 
  702 #ifndef _SOCKLEN_T_DECLARED
  703 typedef __socklen_t     socklen_t;
  704 #define _SOCKLEN_T_DECLARED
  705 #endif
  706 
  707 #if __BSD_VISIBLE
  708 
  709 __BEGIN_DECLS
  710 struct cmsghdr;
  711 
  712 extern int inet6_option_space(int);
  713 extern int inet6_option_init(void *, struct cmsghdr **, int);
  714 extern int inet6_option_append(struct cmsghdr *, const uint8_t *,
  715         int, int);
  716 extern uint8_t *inet6_option_alloc(struct cmsghdr *, int, int, int);
  717 extern int inet6_option_next(const struct cmsghdr *, uint8_t **);
  718 extern int inet6_option_find(const struct cmsghdr *, uint8_t **, int);
  719 
  720 extern size_t inet6_rthdr_space(int, int);
  721 extern struct cmsghdr *inet6_rthdr_init(void *, int);
  722 extern int inet6_rthdr_add(struct cmsghdr *, const struct in6_addr *,
  723         unsigned int);
  724 extern int inet6_rthdr_lasthop(struct cmsghdr *, unsigned int);
  725 #if 0 /* not implemented yet */
  726 extern int inet6_rthdr_reverse(const struct cmsghdr *, struct cmsghdr *);
  727 #endif
  728 extern int inet6_rthdr_segments(const struct cmsghdr *);
  729 extern struct in6_addr *inet6_rthdr_getaddr(struct cmsghdr *, int);
  730 extern int inet6_rthdr_getflags(const struct cmsghdr *, int);
  731 
  732 extern int inet6_opt_init(void *, socklen_t);
  733 extern int inet6_opt_append(void *, socklen_t, int, uint8_t, socklen_t,
  734         uint8_t, void **);
  735 extern int inet6_opt_finish(void *, socklen_t, int);
  736 extern int inet6_opt_set_val(void *, int, void *, socklen_t);
  737 
  738 extern int inet6_opt_next(void *, socklen_t, int, uint8_t *, socklen_t *,
  739         void **);
  740 extern int inet6_opt_find(void *, socklen_t, int, uint8_t, socklen_t *,
  741         void **);
  742 extern int inet6_opt_get_val(void *, int, void *, socklen_t);
  743 extern socklen_t inet6_rth_space(int, int);
  744 extern void *inet6_rth_init(void *, socklen_t, int, int);
  745 extern int inet6_rth_add(void *, const struct in6_addr *);
  746 extern int inet6_rth_reverse(const void *, void *);
  747 extern int inet6_rth_segments(const void *);
  748 extern struct in6_addr *inet6_rth_getaddr(const void *, int);
  749 __END_DECLS
  750 
  751 #endif /* __BSD_VISIBLE */
  752 
  753 #endif /* !_NETINET6_IN6_H_ */

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