FreeBSD/Linux Kernel Cross Reference
sys/netinet6/in6.h

     /*      $NetBSD: in6.h,v 1.44.2.1 2004/06/14 18:00:54 tron Exp $        */
     /*      $KAME: in6.h,v 1.83 2001/03/29 02:55:07 jinmei Exp $    */
     
     /*
      * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the project nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    /*
     * Copyright (c) 1982, 1986, 1990, 1993
     *      The Regents of the University of California.  All rights reserved.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)in.h        8.3 (Berkeley) 1/3/94
     */
    
    #ifndef __KAME_NETINET_IN_H_INCLUDED_
    #error "do not include netinet6/in6.h directly, include netinet/in.h.  see RFC2553"
    #endif
    
    #ifndef _NETINET6_IN6_H_
    #define _NETINET6_IN6_H_
    
    /*
     * Identification of the network protocol stack
     * for *BSD-current/release: http://www.kame.net/dev/cvsweb.cgi/kame/COVERAGE
     * has the table of implementation/integration differences.
     */
    #define __KAME__
    #define __KAME_VERSION          "NetBSD-current"
    
    /*
     * Local port number conventions:
     *
     * Ports < IPPORT_RESERVED are reserved for privileged processes (e.g. root),
     * unless a kernel is compiled with IPNOPRIVPORTS defined.
     *
     * When a user does a bind(2) or connect(2) with a port number of zero,
     * a non-conflicting local port address is chosen.
     *
     * The default range is IPPORT_ANONMIN to IPPORT_ANONMAX, although
     * that is settable by sysctl(3); net.inet.ip.anonportmin and
     * net.inet.ip.anonportmax respectively.
     *
     * A user may set the IPPROTO_IP option IP_PORTRANGE to change this
     * default assignment range.
     *
     * The value IP_PORTRANGE_DEFAULT causes the default behavior.
     *
     * The value IP_PORTRANGE_HIGH is the same as IP_PORTRANGE_DEFAULT,
     * and exists only for FreeBSD compatibility purposes.
     *
    * The value IP_PORTRANGE_LOW changes the range to the "low" are
    * that is (by convention) restricted to privileged processes.
    * This convention is based on "vouchsafe" principles only.
    * It is only secure if you trust the remote host to restrict these ports.
    * The range is IPPORT_RESERVEDMIN to IPPORT_RESERVEDMAX.
    */
   
   #if defined(_NETBSD_SOURCE)
   #define IPV6PORT_RESERVED       1024
   #define IPV6PORT_ANONMIN        49152
   #define IPV6PORT_ANONMAX        65535
   #define IPV6PORT_RESERVEDMIN    600
   #define IPV6PORT_RESERVEDMAX    (IPV6PORT_RESERVED-1)
   #endif
   
   /*
    * IPv6 address
    */
   struct in6_addr {
           union {
                   __uint8_t   __u6_addr8[16];
                   __uint16_t  __u6_addr16[8];
                   uint32_t  __u6_addr32[4];
           } __u6_addr;                    /* 128-bit IP6 address */
   };
   
   #define s6_addr   __u6_addr.__u6_addr8
   #ifdef _KERNEL  /* XXX nonstandard */
   #define s6_addr8  __u6_addr.__u6_addr8
   #define s6_addr16 __u6_addr.__u6_addr16
   #define s6_addr32 __u6_addr.__u6_addr32
   #endif
   
   #define INET6_ADDRSTRLEN        46
   
   /*
    * Socket address for IPv6
    */
   #if defined(_NETBSD_SOURCE)
   #define SIN6_LEN
   #endif
   struct sockaddr_in6 {
           uint8_t         sin6_len;       /* length of this struct(socklen_t)*/
           sa_family_t     sin6_family;    /* AF_INET6 (sa_family_t) */
           in_port_t       sin6_port;      /* Transport layer port */
           uint32_t        sin6_flowinfo;  /* IP6 flow information */
           struct in6_addr sin6_addr;      /* IP6 address */
           uint32_t        sin6_scope_id;  /* scope zone index */
   };
   
   /*
    * Local definition for masks
    */
   #ifdef _KERNEL  /* XXX nonstandard */
   #define IN6MASK0        {{{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }}}
   #define IN6MASK32       {{{ 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, \
                               0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
   #define IN6MASK64       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
                               0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
   #define IN6MASK96       {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
                               0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00 }}}
   #define IN6MASK128      {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
                               0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}}
   #endif
   
   #ifdef _KERNEL
   extern const struct sockaddr_in6 sa6_any;
   
   extern const struct in6_addr in6mask0;
   extern const struct in6_addr in6mask32;
   extern const struct in6_addr in6mask64;
   extern const struct in6_addr in6mask96;
   extern const struct in6_addr in6mask128;
   #endif /* _KERNEL */
   
   /*
    * Macros started with IPV6_ADDR is KAME local
    */
   #ifdef _KERNEL  /* XXX nonstandard */
   #if BYTE_ORDER == BIG_ENDIAN
   #define IPV6_ADDR_INT32_ONE     1
   #define IPV6_ADDR_INT32_TWO     2
   #define IPV6_ADDR_INT32_MNL     0xff010000
   #define IPV6_ADDR_INT32_MLL     0xff020000
   #define IPV6_ADDR_INT32_SMP     0x0000ffff
   #define IPV6_ADDR_INT16_ULL     0xfe80
   #define IPV6_ADDR_INT16_USL     0xfec0
   #define IPV6_ADDR_INT16_MLL     0xff02
   #elif BYTE_ORDER == LITTLE_ENDIAN
   #define IPV6_ADDR_INT32_ONE     0x01000000
   #define IPV6_ADDR_INT32_TWO     0x02000000
   #define IPV6_ADDR_INT32_MNL     0x000001ff
   #define IPV6_ADDR_INT32_MLL     0x000002ff
   #define IPV6_ADDR_INT32_SMP     0xffff0000
   #define IPV6_ADDR_INT16_ULL     0x80fe
   #define IPV6_ADDR_INT16_USL     0xc0fe
   #define IPV6_ADDR_INT16_MLL     0x02ff
   #endif
   #endif
   
   /*
    * Definition of some useful macros to handle IP6 addresses
    */
   #define IN6ADDR_ANY_INIT \
           {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
               0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
   #define IN6ADDR_LOOPBACK_INIT \
           {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
               0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
   #define IN6ADDR_NODELOCAL_ALLNODES_INIT \
           {{{ 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
               0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
   #define IN6ADDR_LINKLOCAL_ALLNODES_INIT \
           {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
               0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
   #define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \
           {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
               0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}}
   
   extern const struct in6_addr in6addr_any;
   extern const struct in6_addr in6addr_loopback;
   extern const struct in6_addr in6addr_nodelocal_allnodes;
   extern const struct in6_addr in6addr_linklocal_allnodes;
   extern const struct in6_addr in6addr_linklocal_allrouters;
   
   /*
    * Equality
    * NOTE: Some of kernel programming environment (for example, openbsd/sparc)
    * does not supply memcmp().  For userland memcmp() is preferred as it is
    * in ANSI standard.
    */
   #ifdef _KERNEL
   #define IN6_ARE_ADDR_EQUAL(a, b)                        \
       (bcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
   #else
   #define IN6_ARE_ADDR_EQUAL(a, b)                        \
       (memcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
   #endif
   
   /*
    * Unspecified
    */
   #define IN6_IS_ADDR_UNSPECIFIED(a)      \
           ((*(const uint32_t *)(const void *)(&(a)->s6_addr[0]) == 0) &&  \
            (*(const uint32_t *)(const void *)(&(a)->s6_addr[4]) == 0) &&  \
            (*(const uint32_t *)(const void *)(&(a)->s6_addr[8]) == 0) &&  \
            (*(const uint32_t *)(const void *)(&(a)->s6_addr[12]) == 0))
   
   /*
    * Loopback
    */
   #define IN6_IS_ADDR_LOOPBACK(a)         \
           ((*(const uint32_t *)(const void *)(&(a)->s6_addr[0]) == 0) &&  \
            (*(const uint32_t *)(const void *)(&(a)->s6_addr[4]) == 0) &&  \
            (*(const uint32_t *)(const void *)(&(a)->s6_addr[8]) == 0) &&  \
            (*(const uint32_t *)(const void *)(&(a)->s6_addr[12]) == ntohl(1)))
   
   /*
    * IPv4 compatible
    */
   #define IN6_IS_ADDR_V4COMPAT(a)         \
           ((*(const uint32_t *)(const void *)(&(a)->s6_addr[0]) == 0) &&  \
            (*(const uint32_t *)(const void *)(&(a)->s6_addr[4]) == 0) &&  \
            (*(const uint32_t *)(const void *)(&(a)->s6_addr[8]) == 0) &&  \
            (*(const uint32_t *)(const void *)(&(a)->s6_addr[12]) != 0) && \
            (*(const uint32_t *)(const void *)(&(a)->s6_addr[12]) != ntohl(1)))
   
   /*
    * Mapped
    */
   #define IN6_IS_ADDR_V4MAPPED(a)               \
           ((*(const uint32_t *)(const void *)(&(a)->s6_addr[0]) == 0) &&  \
            (*(const uint32_t *)(const void *)(&(a)->s6_addr[4]) == 0) &&  \
            (*(const uint32_t *)(const void *)(&(a)->s6_addr[8]) == ntohl(0x0000ffff)))
   
   /*
    * KAME Scope Values
    */
   
   #ifdef _KERNEL  /* XXX nonstandard */
   #define IPV6_ADDR_SCOPE_NODELOCAL       0x01
   #define IPV6_ADDR_SCOPE_LINKLOCAL       0x02
   #define IPV6_ADDR_SCOPE_SITELOCAL       0x05
   #define IPV6_ADDR_SCOPE_ORGLOCAL        0x08    /* just used in this file */
   #define IPV6_ADDR_SCOPE_GLOBAL          0x0e
   #else
   #define __IPV6_ADDR_SCOPE_NODELOCAL     0x01
   #define __IPV6_ADDR_SCOPE_LINKLOCAL     0x02
   #define __IPV6_ADDR_SCOPE_SITELOCAL     0x05
   #define __IPV6_ADDR_SCOPE_ORGLOCAL      0x08    /* just used in this file */
   #define __IPV6_ADDR_SCOPE_GLOBAL        0x0e
   #endif
   
   /*
    * Unicast Scope
    * Note that we must check topmost 10 bits only, not 16 bits (see RFC2373).
    */
   #define IN6_IS_ADDR_LINKLOCAL(a)        \
           (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0x80))
   #define IN6_IS_ADDR_SITELOCAL(a)        \
           (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0xc0))
   
   /*
    * Multicast
    */
   #define IN6_IS_ADDR_MULTICAST(a)        ((a)->s6_addr[0] == 0xff)
   
   #ifdef _KERNEL  /* XXX nonstandard */
   #define IPV6_ADDR_MC_SCOPE(a)           ((a)->s6_addr[1] & 0x0f)
   #else
   #define __IPV6_ADDR_MC_SCOPE(a)         ((a)->s6_addr[1] & 0x0f)
   #endif
   
   /*
    * Multicast Scope
    */
   #ifdef _KERNEL  /* refers nonstandard items */
   #define IN6_IS_ADDR_MC_NODELOCAL(a)     \
           (IN6_IS_ADDR_MULTICAST(a) &&    \
            (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_NODELOCAL))
   #define IN6_IS_ADDR_MC_LINKLOCAL(a)     \
           (IN6_IS_ADDR_MULTICAST(a) &&    \
            (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_LINKLOCAL))
   #define IN6_IS_ADDR_MC_SITELOCAL(a)     \
           (IN6_IS_ADDR_MULTICAST(a) &&    \
            (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_SITELOCAL))
   #define IN6_IS_ADDR_MC_ORGLOCAL(a)      \
           (IN6_IS_ADDR_MULTICAST(a) &&    \
            (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_ORGLOCAL))
   #define IN6_IS_ADDR_MC_GLOBAL(a)        \
           (IN6_IS_ADDR_MULTICAST(a) &&    \
            (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_GLOBAL))
   #else
   #define IN6_IS_ADDR_MC_NODELOCAL(a)     \
           (IN6_IS_ADDR_MULTICAST(a) &&    \
            (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_NODELOCAL))
   #define IN6_IS_ADDR_MC_LINKLOCAL(a)     \
           (IN6_IS_ADDR_MULTICAST(a) &&    \
            (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_LINKLOCAL))
   #define IN6_IS_ADDR_MC_SITELOCAL(a)     \
           (IN6_IS_ADDR_MULTICAST(a) &&    \
            (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_SITELOCAL))
   #define IN6_IS_ADDR_MC_ORGLOCAL(a)      \
           (IN6_IS_ADDR_MULTICAST(a) &&    \
            (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_ORGLOCAL))
   #define IN6_IS_ADDR_MC_GLOBAL(a)        \
           (IN6_IS_ADDR_MULTICAST(a) &&    \
            (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_GLOBAL))
   #endif
   
   #ifdef _KERNEL  /* nonstandard */
   /*
    * KAME Scope
    */
   #define IN6_IS_SCOPE_LINKLOCAL(a)       \
           ((IN6_IS_ADDR_LINKLOCAL(a)) ||  \
            (IN6_IS_ADDR_MC_LINKLOCAL(a)))
   
   #define IFA6_IS_DEPRECATED(a) \
           ((a)->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME && \
            (u_int32_t)((time.tv_sec - (a)->ia6_updatetime)) > \
            (a)->ia6_lifetime.ia6t_pltime)
   #define IFA6_IS_INVALID(a) \
           ((a)->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME && \
            (u_int32_t)((time.tv_sec - (a)->ia6_updatetime)) > \
            (a)->ia6_lifetime.ia6t_vltime)
   #endif
   
   /*
    * IP6 route structure
    */
   #if defined(_NETBSD_SOURCE)
   struct route_in6 {
           struct  rtentry *ro_rt;
           struct  sockaddr_in6 ro_dst;
   };
   #endif
   
   /*
    * Options for use with [gs]etsockopt at the IPV6 level.
    * First word of comment is data type; bool is stored in int.
    */
   #define IPV6_OPTIONS            1  /* buf/ip6_opts; set/get IP6 options */
   /* no hdrincl */
   #define IPV6_SOCKOPT_RESERVED1  3  /* reserved for future use */
   #define IPV6_UNICAST_HOPS       4  /* int; IP6 hops */
   #define IPV6_RECVOPTS           5  /* bool; receive all IP6 opts w/dgram */
   #define IPV6_RECVRETOPTS        6  /* bool; receive IP6 opts for response */
   #define IPV6_RECVDSTADDR        7  /* bool; receive IP6 dst addr w/dgram */
   #define IPV6_RETOPTS            8  /* ip6_opts; set/get IP6 options */
   #define IPV6_MULTICAST_IF       9  /* u_int; set/get IP6 multicast i/f  */
   #define IPV6_MULTICAST_HOPS     10 /* int; set/get IP6 multicast hops */
   #define IPV6_MULTICAST_LOOP     11 /* u_int; set/get IP6 multicast loopback */
   #define IPV6_JOIN_GROUP         12 /* ip6_mreq; join a group membership */
   #define IPV6_LEAVE_GROUP        13 /* ip6_mreq; leave a group membership */
   #define IPV6_PORTRANGE          14 /* int; range to choose for unspec port */
   #if defined(_NETBSD_SOURCE)
   #define ICMP6_FILTER            18 /* icmp6_filter; icmp6 filter */
   #endif
   #define IPV6_PKTINFO            19 /* bool; send/rcv if, src/dst addr */
   #define IPV6_HOPLIMIT           20 /* bool; hop limit */
   #define IPV6_NEXTHOP            21 /* bool; next hop addr */
   #define IPV6_HOPOPTS            22 /* bool; hop-by-hop option */
   #define IPV6_DSTOPTS            23 /* bool; destination option */
   #define IPV6_RTHDR              24 /* bool; routing header */
   #define IPV6_PKTOPTIONS         25 /* buf/cmsghdr; set/get IPv6 options */
   #define IPV6_CHECKSUM           26 /* int; checksum offset for raw socket */
   #define IPV6_V6ONLY             27 /* bool; make AF_INET6 sockets v6 only */
   
   #if 1 /* IPSEC */
   #define IPV6_IPSEC_POLICY       28 /* struct; get/set security policy */
   #endif
   #define IPV6_FAITH              29 /* bool; accept FAITH'ed connections */
   #define IPV6_USE_MIN_MTU        42 /* bool; send packets at the minimum MTU */
   /* to define items, should talk with KAME guys first, for *BSD compatibility */
   
   #define IPV6_RTHDR_LOOSE     0 /* this hop need not be a neighbor. XXX old spec */
   #define IPV6_RTHDR_STRICT    1 /* this hop must be a neighbor. XXX old spec */
   #define IPV6_RTHDR_TYPE_0    0 /* IPv6 routing header type 0 */
   
   /*
    * Defaults and limits for options
    */
   #define IPV6_DEFAULT_MULTICAST_HOPS 1   /* normally limit m'casts to 1 hop  */
   #define IPV6_DEFAULT_MULTICAST_LOOP 1   /* normally hear sends if a member  */
   
   /*
    * Argument structure for IPV6_JOIN_GROUP and IPV6_LEAVE_GROUP.
    */
   struct ipv6_mreq {
           struct in6_addr ipv6mr_multiaddr;
           unsigned int    ipv6mr_interface;
   };
   
   /*
    * IPV6_PKTINFO: Packet information(RFC2292 sec 5)
    */
   struct in6_pktinfo {
           struct in6_addr ipi6_addr;      /* src/dst IPv6 address */
           unsigned int    ipi6_ifindex;   /* send/recv interface index */
   };
   
   /*
    * Argument for IPV6_PORTRANGE:
    * - which range to search when port is unspecified at bind() or connect()
    */
   #define IPV6_PORTRANGE_DEFAULT  0       /* default range */
   #define IPV6_PORTRANGE_HIGH     1       /* "high" - request firewall bypass */
   #define IPV6_PORTRANGE_LOW      2       /* "low" - vouchsafe security */
   
   #if defined(_NETBSD_SOURCE)
   /*
    * Definitions for inet6 sysctl operations.
    *
    * Third level is protocol number.
    * Fourth level is desired variable within that protocol.
    */
   #define IPV6PROTO_MAXID (IPPROTO_PIM + 1)       /* don't list to IPV6PROTO_MAX */
   
   #define CTL_IPV6PROTO_NAMES { \
           { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
           { 0, 0 }, \
           { "tcp6", CTLTYPE_NODE }, \
           { 0, 0 }, \
           { 0, 0 }, \
           { 0, 0 }, \
           { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
           { 0, 0 }, \
           { 0, 0 }, \
           { "udp6", CTLTYPE_NODE }, \
           { 0, 0 }, \
           { 0, 0 }, \
           { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
           { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
           { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
           { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
           { 0, 0 }, \
           { "ip6", CTLTYPE_NODE }, \
           { 0, 0 }, \
           { 0, 0 }, \
           { 0, 0 }, \
           { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
           { 0, 0 }, \
           { "ipsec6", CTLTYPE_NODE }, \
           { 0, 0 }, \
           { 0, 0 }, \
           { 0, 0 }, \
           { 0, 0 }, \
           { 0, 0 }, \
           { 0, 0 }, \
           { "icmp6", CTLTYPE_NODE }, \
           { 0, 0 }, \
           { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
           { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
           { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
           { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
           { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
           { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
           { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
           { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
           { 0, 0 }, \
           { 0, 0 }, \
           { 0, 0 }, \
           { "pim6", CTLTYPE_NODE }, \
   }
   
   /*
    * Names for IP sysctl objects
    */
   #define IPV6CTL_FORWARDING      1       /* act as router */
   #define IPV6CTL_SENDREDIRECTS   2       /* may send redirects when forwarding*/
   #define IPV6CTL_DEFHLIM         3       /* default Hop-Limit */
   #ifdef notyet
   #define IPV6CTL_DEFMTU          4       /* default MTU */
   #endif
   #define IPV6CTL_FORWSRCRT       5       /* forward source-routed dgrams */
   #define IPV6CTL_STATS           6       /* stats */
   #define IPV6CTL_MRTSTATS        7       /* multicast forwarding stats */
   #define IPV6CTL_MRTPROTO        8       /* multicast routing protocol */
   #define IPV6CTL_MAXFRAGPACKETS  9       /* max packets reassembly queue */
   #define IPV6CTL_SOURCECHECK     10      /* verify source route and intf */
   #define IPV6CTL_SOURCECHECK_LOGINT 11   /* minimume logging interval */
   #define IPV6CTL_ACCEPT_RTADV    12
   #define IPV6CTL_KEEPFAITH       13
   #define IPV6CTL_LOG_INTERVAL    14
   #define IPV6CTL_HDRNESTLIMIT    15
   #define IPV6CTL_DAD_COUNT       16
   #define IPV6CTL_AUTO_FLOWLABEL  17
   #define IPV6CTL_DEFMCASTHLIM    18
   #define IPV6CTL_GIF_HLIM        19      /* default HLIM for gif encap packet */
   #define IPV6CTL_KAME_VERSION    20
   #define IPV6CTL_USE_DEPRECATED  21      /* use deprecated addr (RFC2462 5.5.4) */
   #define IPV6CTL_RR_PRUNE        22      /* walk timer for router renumbering */
   /* 23: reserved */
   #define IPV6CTL_V6ONLY          24
   /* 25 to 27: reserved */
   #define IPV6CTL_ANONPORTMIN     28      /* minimum ephemeral port */
   #define IPV6CTL_ANONPORTMAX     29      /* maximum ephemeral port */
   #define IPV6CTL_LOWPORTMIN      30      /* minimum reserved port */
   #define IPV6CTL_LOWPORTMAX      31      /* maximum reserved port */
   /* 32 to 40: resrved */
   #define IPV6CTL_MAXFRAGS        41      /* max fragments */
   #define IPV6CTL_IFQ             42      /* ip6intrq node */
   /* New entries should be added here from current IPV6CTL_MAXID value. */
   /* to define items, should talk with KAME guys first, for *BSD compatibility */
   #define IPV6CTL_MAXID           43
   
   #define IPV6CTL_NAMES { \
           { 0, 0 }, \
           { "forwarding", CTLTYPE_INT }, \
           { "redirect", CTLTYPE_INT }, \
           { "hlim", CTLTYPE_INT }, \
           { "mtu", CTLTYPE_INT }, \
           { "forwsrcrt", CTLTYPE_INT }, \
           { 0, 0 }, \
           { 0, 0 }, \
           { "mrtproto", CTLTYPE_INT }, \
           { "maxfragpackets", CTLTYPE_INT }, \
           { "sourcecheck", CTLTYPE_INT }, \
           { "sourcecheck_logint", CTLTYPE_INT }, \
           { "accept_rtadv", CTLTYPE_INT }, \
           { "keepfaith", CTLTYPE_INT }, \
           { "log_interval", CTLTYPE_INT }, \
           { "hdrnestlimit", CTLTYPE_INT }, \
           { "dad_count", CTLTYPE_INT }, \
           { "auto_flowlabel", CTLTYPE_INT }, \
           { "defmcasthlim", CTLTYPE_INT }, \
           { "gifhlim", CTLTYPE_INT }, \
           { "kame_version", CTLTYPE_STRING }, \
           { "use_deprecated", CTLTYPE_INT }, \
           { "rr_prune", CTLTYPE_INT }, \
           { 0, 0 }, \
           { "v6only", CTLTYPE_INT }, \
           { 0, 0 }, \
           { 0, 0 }, \
           { 0, 0 }, \
           { "anonportmin", CTLTYPE_INT }, \
           { "anonportmax", CTLTYPE_INT }, \
           { "lowportmin", CTLTYPE_INT }, \
           { "lowportmax", CTLTYPE_INT }, \
           { 0, 0 }, \
           { 0, 0 }, \
           { 0, 0 }, \
           { 0, 0 }, \
           { 0, 0 }, \
           { 0, 0 }, \
           { 0, 0 }, \
           { 0, 0 }, \
           { 0, 0 }, \
           { "maxfrags", CTLTYPE_INT }, \
           { "ifq", CTLTYPE_NODE }, \
   }
   
   #endif /* _NETBSD_SOURCE */
   
   #ifdef _KERNEL
   struct cmsghdr;
   
   /*
    * in6_cksum_phdr:
    *
    *      Compute significant parts of the IPv6 checksum pseudo-header
    *      for use in a delayed TCP/UDP checksum calculation.
    *
    *      Args:
    *
    *              src             Source IPv6 address
    *              dst             Destination IPv6 address
    *              len             htonl(proto-hdr-len)
    *              nxt             htonl(next-proto-number)
    *
    *      NOTE: We expect the src and dst addresses to be 16-bit
    *      aligned!
    */
   static __inline u_int16_t __attribute__((__unused__))
   in6_cksum_phdr(const struct in6_addr *src, const struct in6_addr *dst,
       u_int32_t len, u_int32_t nxt)
   {
           u_int32_t sum = 0;
           const u_int16_t *w;
   
           /*LINTED*/
           w = (const u_int16_t *) src;
           sum += w[0];
           if (!IN6_IS_SCOPE_LINKLOCAL(src))
                   sum += w[1];
           sum += w[2]; sum += w[3]; sum += w[4]; sum += w[5];
           sum += w[6]; sum += w[7];
   
           /*LINTED*/
           w = (const u_int16_t *) dst;
           sum += w[0];
           if (!IN6_IS_SCOPE_LINKLOCAL(dst))
                   sum += w[1];
           sum += w[2]; sum += w[3]; sum += w[4]; sum += w[5];
           sum += w[6]; sum += w[7];
   
           sum += (u_int16_t)(len >> 16) + (u_int16_t)(len /*& 0xffff*/);
   
           sum += (u_int16_t)(nxt >> 16) + (u_int16_t)(nxt /*& 0xffff*/);
   
           sum = (u_int16_t)(sum >> 16) + (u_int16_t)(sum /*& 0xffff*/);
   
           if (sum > 0xffff)
                   sum -= 0xffff;
   
           return (sum);
   }
   
   int     in6_cksum __P((struct mbuf *, u_int8_t, u_int32_t, u_int32_t));
   int     in6_localaddr __P((struct in6_addr *));
   int     in6_addrscope __P((struct in6_addr *));
   struct  in6_ifaddr *in6_ifawithscope __P((struct ifnet *, struct in6_addr *));
   struct  in6_ifaddr *in6_ifawithifp __P((struct ifnet *, struct in6_addr *));
   extern void in6_if_up __P((struct ifnet *));
   extern  u_char  ip6_protox[];
   
   #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
   #define sin6tosa(sin6)  ((struct sockaddr *)(sin6))
   #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
   #endif /* _KERNEL */
   
   #if defined(_NETBSD_SOURCE)
   
   #include <machine/ansi.h>
   
   #ifdef  _BSD_SIZE_T_
   typedef _BSD_SIZE_T_            size_t;
   #define _SIZE_T
   #undef  _BSD_SIZE_T_
   #endif
   
   #include <sys/cdefs.h>
   
   __BEGIN_DECLS
   struct cmsghdr;
   
   extern int inet6_option_space __P((int));
   extern int inet6_option_init __P((void *, struct cmsghdr **, int));
   extern int inet6_option_append __P((struct cmsghdr *, const uint8_t *,
           int, int));
   extern uint8_t *inet6_option_alloc __P((struct cmsghdr *, int, int, int));
   extern int inet6_option_next __P((const struct cmsghdr *, uint8_t **));
   extern int inet6_option_find __P((const struct cmsghdr *, uint8_t **, int));
   
   extern size_t inet6_rthdr_space __P((int, int));
   extern struct cmsghdr *inet6_rthdr_init __P((void *, int));
   extern int inet6_rthdr_add __P((struct cmsghdr *, const struct in6_addr *,
                   unsigned int));
   extern int inet6_rthdr_lasthop __P((struct cmsghdr *, unsigned int));
   #if 0 /* not implemented yet */
   extern int inet6_rthdr_reverse __P((const struct cmsghdr *, struct cmsghdr *));
   #endif
   extern int inet6_rthdr_segments __P((const struct cmsghdr *));
   extern struct in6_addr *inet6_rthdr_getaddr __P((struct cmsghdr *, int));
   extern int inet6_rthdr_getflags __P((const struct cmsghdr *, int));
   __END_DECLS
   #endif /* _NETBSD_SOURCE */
   
   #endif /* !_NETINET6_IN6_H_ */

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