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/*      $FreeBSD: src/sys/netinet6/ip6_var.h,v 1.8 2001/09/12 08:37:55 julian Exp $     */

/*      $KAME: ip6_var.h,v 1.62 2001/05/03 14:51:48 itojun 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, 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. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *      This product includes software developed by the University of

 *      California, Berkeley and its contributors.

 * 4. 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.

 *

 *      @(#)ip_var.h    8.1 (Berkeley) 6/10/93

 */

#ifndef _NETINET6_IP6_VAR_H_

#define _NETINET6_IP6_VAR_H_

/*

 * IP6 reassembly queue structure.  Each fragment

 * being reassembled is attached to one of these structures.

 */

struct  ip6q {

        u_int32_t       ip6q_head;

        u_int16_t       ip6q_len;

        u_int8_t        ip6q_nxt;       /* ip6f_nxt in first fragment */

        u_int8_t        ip6q_hlim;

        struct ip6asfrag *ip6q_down;

        struct ip6asfrag *ip6q_up;

        u_int32_t       ip6q_ident;

        u_int8_t        ip6q_arrive;

        u_int8_t        ip6q_ttl;

        struct in6_addr ip6q_src, ip6q_dst;

        struct ip6q     *ip6q_next;

        struct ip6q     *ip6q_prev;

        int             ip6q_unfrglen;  /* len of unfragmentable part */

#ifdef notyet

        u_char          *ip6q_nxtp;

#endif

};

struct  ip6asfrag {

        u_int32_t       ip6af_head;

        u_int16_t       ip6af_len;

        u_int8_t        ip6af_nxt;

        u_int8_t        ip6af_hlim;

        /* must not override the above members during reassembling */

        struct ip6asfrag *ip6af_down;

        struct ip6asfrag *ip6af_up;

        struct mbuf     *ip6af_m;

        int             ip6af_offset;   /* offset in ip6af_m to next header */

        int             ip6af_frglen;   /* fragmentable part length */

        int             ip6af_off;      /* fragment offset */

        u_int16_t       ip6af_mff;      /* more fragment bit in frag off */

};

#define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m))

struct  ip6_moptions {

        struct  ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */

        u_char  im6o_multicast_hlim;    /* hoplimit for outgoing multicasts */

        u_char  im6o_multicast_loop;    /* 1 >= hear sends if a member */

        LIST_HEAD(, in6_multi_mship) im6o_memberships;

};

/*

 * Control options for outgoing packets

 */

/* Routing header related info */

struct  ip6po_rhinfo {

        struct  ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */

        struct  route_in6 ip6po_rhi_route; /* Route to the 1st hop */

};

#define ip6po_rthdr     ip6po_rhinfo.ip6po_rhi_rthdr

#define ip6po_route     ip6po_rhinfo.ip6po_rhi_route

struct  ip6_pktopts {

        struct  mbuf *ip6po_m;  /* Pointer to mbuf storing the data */

        int     ip6po_hlim;     /* Hoplimit for outgoing packets */

        /* Outgoing IF/address information */

        struct  in6_pktinfo *ip6po_pktinfo;

        struct  sockaddr *ip6po_nexthop; /* Next-hop address */

        struct  ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */

        /* Destination options header (before a routing header) */

        struct  ip6_dest *ip6po_dest1;

        /* Routing header related info. */

        struct  ip6po_rhinfo ip6po_rhinfo;

        /* Destination options header (after a routing header) */

        struct  ip6_dest *ip6po_dest2;

};

/*

 * Control options for incoming packets

 */

struct  ip6stat {

        u_quad_t ip6s_total;            /* total packets received */

        u_quad_t ip6s_tooshort;         /* packet too short */

        u_quad_t ip6s_toosmall;         /* not enough data */

        u_quad_t ip6s_fragments;        /* fragments received */

        u_quad_t ip6s_fragdropped;      /* frags dropped(dups, out of space) */

        u_quad_t ip6s_fragtimeout;      /* fragments timed out */

        u_quad_t ip6s_fragoverflow;     /* fragments that exceeded limit */

        u_quad_t ip6s_forward;          /* packets forwarded */

        u_quad_t ip6s_cantforward;      /* packets rcvd for unreachable dest */

        u_quad_t ip6s_redirectsent;     /* packets forwarded on same net */

        u_quad_t ip6s_delivered;        /* datagrams delivered to upper level*/

        u_quad_t ip6s_localout;         /* total ip packets generated here */

        u_quad_t ip6s_odropped;         /* lost packets due to nobufs, etc. */

        u_quad_t ip6s_reassembled;      /* total packets reassembled ok */

        u_quad_t ip6s_fragmented;       /* datagrams sucessfully fragmented */

        u_quad_t ip6s_ofragments;       /* output fragments created */

        u_quad_t ip6s_cantfrag;         /* don't fragment flag was set, etc. */

        u_quad_t ip6s_badoptions;       /* error in option processing */

        u_quad_t ip6s_noroute;          /* packets discarded due to no route */

        u_quad_t ip6s_badvers;          /* ip6 version != 6 */

        u_quad_t ip6s_rawout;           /* total raw ip packets generated */

        u_quad_t ip6s_badscope;         /* scope error */

        u_quad_t ip6s_notmember;        /* don't join this multicast group */

        u_quad_t ip6s_nxthist[256];     /* next header history */

        u_quad_t ip6s_m1;               /* one mbuf */

        u_quad_t ip6s_m2m[32];          /* two or more mbuf */

        u_quad_t ip6s_mext1;            /* one ext mbuf */

        u_quad_t ip6s_mext2m;           /* two or more ext mbuf */

        u_quad_t ip6s_exthdrtoolong;    /* ext hdr are not continuous */

        u_quad_t ip6s_nogif;            /* no match gif found */

        u_quad_t ip6s_toomanyhdr;       /* discarded due to too many headers */

        /*

         * statistics for improvement of the source address selection

         * algorithm:

         * XXX: hardcoded 16 = # of ip6 multicast scope types + 1

         */

        /* number of times that address selection fails */

        u_quad_t ip6s_sources_none;

        /* number of times that an address on the outgoing I/F is chosen */

        u_quad_t ip6s_sources_sameif[16];

        /* number of times that an address on a non-outgoing I/F is chosen */

        u_quad_t ip6s_sources_otherif[16];

        /*

         * number of times that an address that has the same scope

         * from the destination is chosen.

         */

        u_quad_t ip6s_sources_samescope[16];

        /*

         * number of times that an address that has a different scope

         * from the destination is chosen.

         */

        u_quad_t ip6s_sources_otherscope[16];

        /* number of times that an deprecated address is chosen */

        u_quad_t ip6s_sources_deprecated[16];

        u_quad_t ip6s_forward_cachehit;

        u_quad_t ip6s_forward_cachemiss;

};

#ifdef _KERNEL

/*

 * IPv6 onion peeling state.

 * it will be initialized when we come into ip6_input().

 * XXX do not make it a kitchen sink!

 */

struct ip6aux {

        u_int32_t ip6a_flags;

#define IP6A_SWAP       0x01            /* swapped home/care-of on packet */

#define IP6A_HASEEN     0x02            /* HA was present */

#define IP6A_BRUID      0x04            /* BR Unique Identifier was present */

#define IP6A_RTALERTSEEN 0x08           /* rtalert present */

        /* ip6.ip6_src */

        struct in6_addr ip6a_careof;    /* care-of address of the peer */

        struct in6_addr ip6a_home;      /* home address of the peer */

        u_int16_t       ip6a_bruid;     /* BR unique identifier */

        /* ip6.ip6_dst */

        struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */

        /* rtalert */

        u_int16_t ip6a_rtalert;         /* rtalert option value */

        /*

         * decapsulation history will be here.

         * with IPsec it may not be accurate.

         */

};

#endif

#ifdef _KERNEL

/* flags passed to ip6_output as last parameter */

#define IPV6_DADOUTPUT          0x01    /* DAD */

#define IPV6_FORWARDING         0x02    /* most of IPv6 header exists */

#define IPV6_MINMTU             0x04    /* use minimum MTU (IPV6_USE_MIN_MTU) */

extern struct   ip6stat ip6stat;        /* statistics */

extern u_int32_t ip6_id;                /* fragment identifier */

extern int      ip6_defhlim;            /* default hop limit */

extern int      ip6_defmcasthlim;       /* default multicast hop limit */

extern int      ip6_forwarding;         /* act as router? */

extern int      ip6_forward_srcrt;      /* forward src-routed? */

extern int      ip6_gif_hlim;           /* Hop limit for gif encap packet */

extern int      ip6_use_deprecated;     /* allow deprecated addr as source */

extern int      ip6_rr_prune;           /* router renumbering prefix

                                         * walk list every 5 sec.    */

#define ip6_mapped_addr_on      (!ip6_v6only)

extern int      ip6_v6only;

extern struct socket *ip6_mrouter;      /* multicast routing daemon */

extern int      ip6_sendredirects;      /* send IP redirects when forwarding? */

extern int      ip6_maxfragpackets; /* Maximum packets in reassembly queue */

extern int      ip6_sourcecheck;        /* Verify source interface */

extern int      ip6_sourcecheck_interval; /* Interval between log messages */

extern int      ip6_accept_rtadv;       /* Acts as a host not a router */

extern int      ip6_keepfaith;          /* Firewall Aided Internet Translator */

extern int      ip6_log_interval;

extern time_t   ip6_log_time;

extern int      ip6_hdrnestlimit; /* upper limit of # of extension headers */

extern int      ip6_dad_count;          /* DupAddrDetectionTransmits */

extern u_int32_t ip6_flow_seq;

extern int ip6_auto_flowlabel;

extern int ip6_auto_linklocal;

extern int   ip6_anonportmin;           /* minimum ephemeral port */

extern int   ip6_anonportmax;           /* maximum ephemeral port */

extern int   ip6_lowportmin;            /* minimum reserved port */

extern int   ip6_lowportmax;            /* maximum reserved port */

extern int      ip6_use_tempaddr; /* whether to use temporary addresses. */

extern struct   pr_usrreqs rip6_usrreqs;

struct sockopt;

struct inpcb;

int     icmp6_ctloutput __P((struct socket *, struct sockopt *sopt));

struct in6_ifaddr;

void    ip6_init __P((void));

void    ip6intr __P((void));

void    ip6_input __P((struct mbuf *));

struct in6_ifaddr *ip6_getdstifaddr __P((struct mbuf *));

void    ip6_freepcbopts __P((struct ip6_pktopts *));

void    ip6_freemoptions __P((struct ip6_moptions *));

int     ip6_unknown_opt __P((u_int8_t *, struct mbuf *, int));

char *  ip6_get_prevhdr __P((struct mbuf *, int));

int     ip6_nexthdr __P((struct mbuf *, int, int, int *));

int     ip6_lasthdr __P((struct mbuf *, int, int, int *));

struct mbuf *ip6_addaux __P((struct mbuf *));

struct mbuf *ip6_findaux __P((struct mbuf *));

void    ip6_delaux __P((struct mbuf *));

int     ip6_mforward __P((struct ip6_hdr *, struct ifnet *, struct mbuf *));

int     ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *,

                                 u_int32_t *));

void    ip6_savecontrol __P((struct inpcb *, struct mbuf **, struct ip6_hdr *,

                             struct mbuf *));

void    ip6_notify_pmtu __P((struct inpcb *, struct sockaddr_in6 *,

                             u_int32_t *));

int     ip6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t));

void    ip6_forward __P((struct mbuf *, int));

void    ip6_mloopback __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *));

int     ip6_output __P((struct mbuf *, struct ip6_pktopts *,

                        struct route_in6 *,

                        int,

                        struct ip6_moptions *, struct ifnet **));

int     ip6_ctloutput __P((struct socket *, struct sockopt *sopt));

void    init_ip6pktopts __P((struct ip6_pktopts *));

int     ip6_setpktoptions __P((struct mbuf *, struct ip6_pktopts *, int, int));

void    ip6_clearpktopts __P((struct ip6_pktopts *, int, int));

struct ip6_pktopts *ip6_copypktopts __P((struct ip6_pktopts *, int));

int     ip6_optlen __P((struct inpcb *));

int     route6_input __P((struct mbuf **, int *, int));

void    frag6_init __P((void));

int     frag6_input __P((struct mbuf **, int *, int));

void    frag6_slowtimo __P((void));

void    frag6_drain __P((void));

void    rip6_init __P((void));

int     rip6_input __P((struct mbuf **mp, int *offp, int proto));

void    rip6_ctlinput __P((int, struct sockaddr *, void *));

int     rip6_ctloutput __P((struct socket *so, struct sockopt *sopt));

int     rip6_output __P((struct mbuf *, ...));

int     rip6_usrreq __P((struct socket *,

            int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *));

int     dest6_input __P((struct mbuf **, int *, int));

int     none_input __P((struct mbuf **, int *, int));

#endif /* _KERNEL */

#endif /* !_NETINET6_IP6_VAR_H_ */