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/*!\file netinet6/ip6proto.h
 *
 */

/*      $FreeBSD: src/sys/netinet6/ip6protosw.h,v 1.9 2002/04/19 04:46:23 suz Exp $     */
/*      $KAME: ip6protosw.h,v 1.25 2001/09/26 06:13:03 keiichi 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.
 *
 */

/*      BSDI protosw.h,v 2.3 1996/10/11 16:02:40 pjd Exp        */

/*-
 * 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.
 *
 *      @(#)protosw.h   8.1 (Berkeley) 6/2/93
 */

#ifndef _NETINET6_IP6PROTOSW_H_
#define _NETINET6_IP6PROTOSW_H_

/*
 * For pfil_head structure.
 */
#include <net/pfil.h>

/*
 * Protocol switch table for IPv6.
 * All other definitions should refer to sys/protosw.h
 */

struct mbuf;
struct sockaddr;
struct socket;
struct domain;
struct thread;
struct ip6_hdr;
struct icmp6_hdr;
struct in6_addr;
struct pr_usrreqs;

/*
 * argument type for the last arg of pr_ctlinput().
 * should be consulted only with AF_INET6 family.
 *
 * IPv6 ICMP IPv6 [exthdrs] finalhdr paylaod
 * ^    ^    ^              ^
 * |    |    ip6c_ip6       ip6c_off
 * |    ip6c_icmp6
 * ip6c_m
 *
 * ip6c_finaldst usually points to ip6c_ip6->ip6_dst.  if the original
 * (internal) packet carries a routing header, it may point the final
 * dstination address in the routing header.
 *
 * ip6c_src: ip6c_ip6->ip6_src + scope info + flowlabel in ip6c_ip6
 *      (beware of flowlabel, if you try to compare it against others)
 * ip6c_dst: ip6c_finaldst + scope info
 */
struct ip6ctlparam {
        struct mbuf *ip6c_m;            /* start of mbuf chain */
        struct icmp6_hdr *ip6c_icmp6;   /* icmp6 header of target packet */
        struct ip6_hdr *ip6c_ip6;       /* ip6 header of target packet */
        int ip6c_off;                   /* offset of the target proto header */
        struct sockaddr_in6 *ip6c_src;  /* srcaddr w/ additional info */
        struct sockaddr_in6 *ip6c_dst;  /* (final) dstaddr w/ additional info */
        struct in6_addr *ip6c_finaldst; /* final destination address */
        void *ip6c_cmdarg;              /* control command dependent data */
        u_int8_t ip6c_nxt;              /* final next header field */
};

struct ip6protosw {
        short   pr_type;                /* socket type used for */
        struct  domain *pr_domain;      /* domain protocol a member of */
        short   pr_protocol;            /* protocol number */
        short   pr_flags;               /* see below */

/* protocol-protocol hooks */
        int     (*pr_input)             /* input to protocol (from below) */
                        __P((struct mbuf **, int *, int));
        int     (*pr_output)            /* output to protocol (from above) */
                        __P((struct mbuf *, ...));
        void    (*pr_ctlinput)          /* control input (from below) */
                        __P((int, struct sockaddr *, void *));
        int     (*pr_ctloutput)         /* control output (from above) */
                        __P((struct socket *, struct sockopt *));

/* user-protocol hook */
        int     (*pr_usrreq)            /* user request: see list below */
                        __P((struct socket *, int, struct mbuf *,
                             struct mbuf *, struct mbuf *, struct thread *));

/* utility hooks */
        void    (*pr_init)              /* initialization hook */
                        __P((void));

        void    (*pr_fasttimo)          /* fast timeout (200ms) */
                        __P((void));
        void    (*pr_slowtimo)          /* slow timeout (500ms) */
                        __P((void));
        void    (*pr_drain)             /* flush any excess space possible */
                        __P((void));
        struct  pr_usrreqs *pr_usrreqs; /* supersedes pr_usrreq() */
        struct  pfil_head       pr_pfh;
};

#ifdef _KERNEL
extern struct ip6protosw inet6sw[];
#endif


#endif /* !_NETINET6_IP6PROTOSW_H_ */