/*      $OpenBSD: in6.h,v 1.125 2025/09/16 09:19:16 florian 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/cvsweb2.cgi/kame/COVERAGE
 * has the table of implementation/integration differences.
 */
#define __KAME__

/*
 * IPv6 address
 */
struct in6_addr {
        union {
                u_int8_t   __u6_addr8[16];
                u_int16_t  __u6_addr16[8];
                u_int32_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

#ifndef INET6_ADDRSTRLEN
#define INET6_ADDRSTRLEN        46
#endif

/*
 * Socket address for IPv6
 */
#if __BSD_VISIBLE
#define SIN6_LEN        /* Indicates sockaddr_in6 has a sin6_len field */
#endif /* __BSD_VISIBLE */
struct sockaddr_in6 {
        u_int8_t        sin6_len;       /* length of this struct(sa_family_t)*/
        sa_family_t     sin6_family;    /* AF_INET6 (sa_family_t) */
        in_port_t       sin6_port;      /* Transport layer port # (in_port_t)*/
        u_int32_t       sin6_flowinfo;  /* IP6 flow information */
        struct in6_addr sin6_addr;      /* IP6 address */
        u_int32_t       sin6_scope_id;  /* intface scope id */
};


/*
 * 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 }}}

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 */

/* Both kernel and libc define these for use */
extern const struct in6_addr in6addr_any;
extern const struct in6_addr in6addr_loopback;
extern const struct in6_addr in6addr_intfacelocal_allnodes;
extern const struct in6_addr in6addr_linklocal_allnodes;
extern const struct in6_addr in6addr_linklocal_allrouters;

#if __BSD_VISIBLE
/*
 * 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_INTFACELOCAL_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 }}}

#define IN6_ARE_ADDR_EQUAL(a, b)                        \
    (memcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)

#endif /* __BSD_VISIBLE */

/*
 * Macros started with IPV6_ADDR is KAME local
 */
#define __IPV6_ADDR_INT32_ONE   htonl(1)
#define __IPV6_ADDR_INT32_TWO   htonl(2)
#define __IPV6_ADDR_INT32_MNL   htonl(0xff010000)
#define __IPV6_ADDR_INT32_MLL   htonl(0xff020000)
#define __IPV6_ADDR_INT32_SMP   htonl(0x0000ffff)
#define __IPV6_ADDR_INT16_ULL   htons(0xfe80)
#define __IPV6_ADDR_INT16_USL   htons(0xfec0)
#define __IPV6_ADDR_INT16_MLL   htons(0xff02)

/*
 * Unspecified
 */
#define IN6_IS_ADDR_UNSPECIFIED(a)      \
        ((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
         (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
         (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == 0) && \
         (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) == 0))

/*
 * Loopback
 */
#define IN6_IS_ADDR_LOOPBACK(a)         \
        ((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
         (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
         (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == 0) && \
         (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) == __IPV6_ADDR_INT32_ONE))

/*
 * IPv4 compatible
 */
#define IN6_IS_ADDR_V4COMPAT(a)         \
        ((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
         (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
         (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == 0) && \
         (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) != 0) &&        \
         (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) != __IPV6_ADDR_INT32_ONE))

/*
 * Mapped
 */
#define IN6_IS_ADDR_V4MAPPED(a)               \
        ((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \
         (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \
         (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == __IPV6_ADDR_INT32_SMP))

/*
 * 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 __IPV6_ADDR_MC_SCOPE(a)         ((a)->s6_addr[1] & 0x0f)
#define IN6_IS_ADDR_MULTICAST(a)        ((a)->s6_addr[0] == 0xff)

#define __IPV6_ADDR_SCOPE_NODELOCAL     0x01
#define __IPV6_ADDR_SCOPE_INTFACELOCAL  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

#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_INTFACELOCAL(a)  \
        (IN6_IS_ADDR_MULTICAST(a) &&    \
         (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_INTFACELOCAL))
#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))

#ifdef _KERNEL
#define IN6_IS_SCOPE_LINKLOCAL(a)       \
        ((IN6_IS_ADDR_LINKLOCAL(a)) ||  \
         (IN6_IS_ADDR_MC_LINKLOCAL(a)))
#define IN6_IS_SCOPE_EMBED(a)   \
        ((IN6_IS_ADDR_LINKLOCAL(a)) ||  \
         (IN6_IS_ADDR_MC_LINKLOCAL(a)) || \
         (IN6_IS_ADDR_MC_INTFACELOCAL(a)))

#define IFA6_IS_DEPRECATED(a) \
        ((a)->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME && \
         (u_int32_t)((getuptime() - (a)->ia6_updatetime)) > \
         (a)->ia6_lifetime.ia6t_pltime)
#define IFA6_IS_INVALID(a) \
        ((a)->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME && \
         (u_int32_t)((getuptime() - (a)->ia6_updatetime)) > \
         (a)->ia6_lifetime.ia6t_vltime)

#endif /* _KERNEL */

/*
 * Options for use with [gs]etsockopt at the IPV6 level.
 * First word of comment is data type; bool is stored in int.
 */
#define IPV6_UNICAST_HOPS       4  /* int; IP6 hops */
#define IPV6_MULTICAST_IF       9  /* u_int; set/get IP6 multicast i/f */
#define IPV6_MULTICAST_HOPS     10 /* u_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 __BSD_VISIBLE
#define ICMP6_FILTER            18 /* icmp6_filter; icmp6 filter */
#endif

#define IPV6_CHECKSUM           26 /* int; checksum offset for raw socket */
#define IPV6_V6ONLY             27 /* bool; make AF_INET6 sockets v6 only */

/* new socket options introduced in RFC3542 */
#define IPV6_RTHDRDSTOPTS       35 /* ip6_dest; send dst option before rthdr */

#define IPV6_RECVPKTINFO        36 /* bool; recv if, dst addr */
#define IPV6_RECVHOPLIMIT       37 /* bool; recv hop limit */
#define IPV6_RECVRTHDR          38 /* bool; recv routing header */
#define IPV6_RECVHOPOPTS        39 /* bool; recv hop-by-hop option */
#define IPV6_RECVDSTOPTS        40 /* bool; recv dst option after rthdr */

#define IPV6_USE_MIN_MTU        42 /* bool; send packets at the minimum MTU */
#define IPV6_RECVPATHMTU        43 /* bool; notify an according MTU */

#define IPV6_PATHMTU            44 /* mtuinfo; get the current path MTU (sopt),
                                      4 bytes int; MTU notification (cmsg) */

/* More new socket options introduced in RFC3542 */
#define IPV6_PKTINFO            46 /* in6_pktinfo; send if, src addr */
#define IPV6_HOPLIMIT           47 /* int; send hop limit */
#define IPV6_NEXTHOP            48 /* sockaddr; next hop addr */
#define IPV6_HOPOPTS            49 /* ip6_hbh; send hop-by-hop option */
#define IPV6_DSTOPTS            50 /* ip6_dest; send dst option before rthdr */
#define IPV6_RTHDR              51 /* ip6_rthdr; send routing header */

#define IPV6_AUTH_LEVEL         53   /* int; authentication used */
#define IPV6_ESP_TRANS_LEVEL    54   /* int; transport encryption */
#define IPV6_ESP_NETWORK_LEVEL  55   /* int; full-packet encryption */
#if __BSD_VISIBLE
#define IPSEC6_OUTSA            56   /* set the outbound SA for a socket */
#endif
#define IPV6_RECVTCLASS         57   /* bool; recv traffic class values */

#define IPV6_AUTOFLOWLABEL      59   /* bool; attach flowlabel automagically */
#define IPV6_IPCOMP_LEVEL       60   /* int; compression */

#define IPV6_TCLASS             61   /* int; send traffic class value */
#define IPV6_DONTFRAG           62   /* bool; disable IPv6 fragmentation */
#define IPV6_PIPEX              63   /* bool; using PIPEX */

#define IPV6_RECVDSTPORT        64   /* bool; receive IP dst port w/dgram */
#define IPV6_MINHOPCOUNT        65   /* int; minimum recv hop limit */

#define IPV6_RTABLE             0x1021  /* int; routing table, see SO_RTABLE */

/* to define items, should talk with KAME guys first, for *BSD compatibility */
#define IPV6_RTHDR_LOOSE        0       /* this hop need not be a neighbor */
#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(RFC3542 sec 6)
 */
struct in6_pktinfo {
        struct in6_addr ipi6_addr;      /* src/dst IPv6 address */
        unsigned int    ipi6_ifindex;   /* send/recv interface index */
};

/*
 * Control structure for IPV6_RECVPATHMTU socket option.
 * XXX Not allowed here by POSIX, but required by RFC 3542, so go
 * XXX with the code on the pavement.
 */
struct ip6_mtuinfo {
        struct sockaddr_in6 ip6m_addr;  /* or sockaddr_storage? */
        u_int32_t ip6m_mtu;
};

/*
 * 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 */

#ifdef __BSD_VISIBLE

#ifndef _SOCKLEN_T_DEFINED_
#define _SOCKLEN_T_DEFINED_
typedef __socklen_t     socklen_t;      /* length type for network syscalls */
#endif

#endif /* __BSD_VISIBLE */

#ifdef _KERNEL
extern const u_char inet6ctlerrmap[];
extern const struct in6_addr zeroin6_addr;

struct mbuf;
struct sockaddr;
struct sockaddr_in6;
struct ifaddr;
struct in6_ifaddr;
struct ifnet;
struct rtentry;
struct netstack;

void    ipv6_input(struct ifnet *, struct mbuf *, struct netstack *);
struct mbuf *
        ipv6_check(struct ifnet *, struct mbuf *);

int     in6_cksum(struct mbuf *, uint8_t, uint32_t, uint32_t);
void    in6_proto_cksum_out(struct mbuf *, struct ifnet *);
int     in6_addrscope(const struct in6_addr *);
struct  in6_ifaddr *in6_ifawithscope(struct ifnet *, const struct in6_addr *,
            u_int, struct rtentry *);
int     in6_mask2len(struct in6_addr *, u_char *);
int     in6_nam2sin6(const struct mbuf *, struct sockaddr_in6 **);
int     in6_sa2sin6(struct sockaddr *, struct sockaddr_in6 **);

struct ip6_pktopts;
struct ip6_moptions;

int     in6_embedscope(struct in6_addr *, const struct sockaddr_in6 *,
            const struct ip6_pktopts *, const struct ip6_moptions *);
void    in6_recoverscope(struct sockaddr_in6 *, const struct in6_addr *);
void    in6_clearscope(struct in6_addr *);

/*
 * Convert between address family specific and general structs.
 * Inline functions check the source type and are stricter than
 * casts or defines.
 */

static inline struct sockaddr_in6 *
satosin6(struct sockaddr *sa)
{
        return ((struct sockaddr_in6 *)(sa));
}

static inline const struct sockaddr_in6 *
satosin6_const(const struct sockaddr *sa)
{
        return ((const struct sockaddr_in6 *)(sa));
}

static inline struct sockaddr *
sin6tosa(struct sockaddr_in6 *sin6)
{
        return ((struct sockaddr *)(sin6));
}

static inline const struct sockaddr *
sin6tosa_const(const struct sockaddr_in6 *sin6)
{
        return ((const struct sockaddr *)(sin6));
}

static inline struct in6_ifaddr *
ifatoia6(struct ifaddr *ifa)
{
        return ((struct in6_ifaddr *)(ifa));
}

#endif /* _KERNEL */

#if __BSD_VISIBLE
/*
 * Definitions for inet6 sysctl operations.
 *
 * Third level is protocol number.
 * Fourth level is desired variable within that protocol.
 */
#define IPV6PROTO_MAXID (IPPROTO_DIVERT + 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 }, \
        { 0, 0 }, \
        { 0, 0 }, \
        { 0, 0 }, \
        { 0, 0 }, \
        { 0, 0 }, \
        { 0, 0 }, \
        { 0, 0 }, \
/*110*/ { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
        { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
/*120*/ { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
        { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
/*130*/ { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
        { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
/*140*/ { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
        { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
/*150*/ { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
        { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
/*160*/ { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
        { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
/*170*/ { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
        { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
/*180*/ { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
        { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
/*190*/ { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
        { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
/*200*/ { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
        { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
/*210*/ { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
        { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
/*220*/ { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
        { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
/*230*/ { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
        { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
/*240*/ { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
        { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
/*250*/ { 0, 0 }, \
        { 0, 0 }, \
        { 0, 0 }, \
        { 0, 0 }, \
        { 0, 0 }, \
        { 0, 0 }, \
        { 0, 0 }, \
        { 0, 0 }, \
        { "divert", 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 */
#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   /* minimum logging interval */
#define IPV6CTL_ACCEPT_RTADV    12
#define IPV6CTL_LOG_INTERVAL    14
#define IPV6CTL_HDRNESTLIMIT    15
#define IPV6CTL_DAD_COUNT       16
#define IPV6CTL_AUTO_FLOWLABEL  17
#define IPV6CTL_DEFMCASTHLIM    18
/* 24 to 40: reserved */
#define IPV6CTL_MAXFRAGS        41      /* max fragments */
#define IPV6CTL_MFORWARDING     42
#define IPV6CTL_MULTIPATH       43
#define IPV6CTL_MCAST_PMTU      44      /* path MTU discovery for multicast */
#define IPV6CTL_NEIGHBORGCTHRESH 45
#define IPV6CTL_MAXDYNROUTES    48
#define IPV6CTL_DAD_PENDING     49
#define IPV6CTL_MTUDISCTIMEOUT  50
#define IPV6CTL_IFQUEUE         51
#define IPV6CTL_MRTMIF          52
#define IPV6CTL_MRTMFC          53
#define IPV6CTL_MAXID           54

/* 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_NAMES { \
        { 0, 0 }, \
        { "forwarding", CTLTYPE_INT }, \
        { "redirect", CTLTYPE_INT }, \
        { "hlim", CTLTYPE_INT }, \
        { 0, 0 }, \
        { "forwsrcrt", CTLTYPE_INT }, \
        { 0, 0 }, \
        { 0, 0 }, \
        { "mrtproto", CTLTYPE_INT }, \
        { "maxfragpackets", CTLTYPE_INT }, \
        { "sourcecheck", CTLTYPE_INT }, \
        { "sourcecheck_logint", CTLTYPE_INT }, \
        { 0, 0 }, \
        { 0, 0 }, \
        { 0, 0 }, \
        { "hdrnestlimit", CTLTYPE_INT }, \
        { "dad_count", CTLTYPE_INT }, \
        { 0, 0 }, \
        { "defmcasthlim", CTLTYPE_INT }, \
        { 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 }, \
        { "maxfrags", CTLTYPE_INT }, \
        { "mforwarding", CTLTYPE_INT }, \
        { "multipath", CTLTYPE_INT }, \
        { "multicast_mtudisc", CTLTYPE_INT }, \
        { "neighborgcthresh", CTLTYPE_INT }, \
        { 0, 0 }, \
        { 0, 0 }, \
        { "maxdynroutes", CTLTYPE_INT }, \
        { "dad_pending", CTLTYPE_INT }, \
        { "mtudisctimeout", CTLTYPE_INT }, \
        { "ifq", CTLTYPE_NODE }, \
        { "mrtmif", CTLTYPE_STRUCT }, \
        { "mrtmfc", CTLTYPE_STRUCT }, \
}

__BEGIN_DECLS
struct cmsghdr;

extern int inet6_opt_init(void *, socklen_t);
extern int inet6_opt_append(void *, socklen_t, int, u_int8_t,
                socklen_t, u_int8_t, void **);
extern int inet6_opt_finish(void *, socklen_t, int);
extern int inet6_opt_set_val(void *, int, void *, socklen_t);

extern int inet6_opt_next(void *, socklen_t, int, u_int8_t *,
                socklen_t *, void **);
extern int inet6_opt_find(void *, socklen_t, int, u_int8_t,
                socklen_t *, void **);
extern int inet6_opt_get_val(void *, int, void *, socklen_t);

extern socklen_t inet6_rth_space(int, int);
extern void *inet6_rth_init(void *, socklen_t, int, int);
extern int inet6_rth_add(void *, const struct in6_addr *);
extern int inet6_rth_reverse(const void *, void *);
extern int inet6_rth_segments(const void *);
extern struct in6_addr *inet6_rth_getaddr(const void *, int);
__END_DECLS
#endif /* __BSD_VISIBLE */

#endif /* !_NETINET6_IN6_H_ */