FreeBSD/Linux Kernel Cross Reference
sys/netinet/ip_encap.h

     /*      $FreeBSD$       */
     /*      $KAME: ip_encap.h,v 1.7 2000/03/25 07:23:37 sumikawa Exp $      */
     
     /*-
      * SPDX-License-Identifier: BSD-3-Clause
      *
      * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
      * Copyright (c) 2018 Andrey V. Elsukov <ae@FreeBSD.org>
      * 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.
     */
    
    #ifndef _NETINET_IP_ENCAP_H_
    #define _NETINET_IP_ENCAP_H_
    
    #ifdef _KERNEL
    
    int     encap4_input(struct mbuf **, int *, int);
    int     encap6_input(struct mbuf **, int *, int);
    
    typedef int (*encap_lookup_t)(const struct mbuf *, int, int, void **);
    typedef int (*encap_check_t)(const struct mbuf *, int, int, void *);
    typedef int (*encap_input_t)(struct mbuf *, int, int, void *);
    typedef void (*encap_srcaddr_t)(void *, const struct sockaddr *, int);
    
    struct encap_config {
            int             proto;          /* protocol */
            int             min_length;     /* minimum packet length */
            int             max_hdrsize;    /* maximum header size */
            int             exact_match;    /* a packet is exactly matched */
    #define ENCAP_DRV_LOOKUP        0x7fffffff
    
            encap_lookup_t  lookup;
            encap_check_t   check;
            encap_input_t   input;
    
            void            *pad[3];
    };
    
    struct encaptab;
    struct srcaddrtab;
    
    const struct encaptab *ip_encap_attach(const struct encap_config *,
        void *arg, int mflags);
    const struct encaptab *ip6_encap_attach(const struct encap_config *,
        void *arg, int mflags);
    
    const struct srcaddrtab *ip_encap_register_srcaddr(encap_srcaddr_t,
        void *arg, int mflags);
    const struct srcaddrtab *ip6_encap_register_srcaddr(encap_srcaddr_t,
        void *arg, int mflags);
    
    int ip_encap_unregister_srcaddr(const struct srcaddrtab *);
    int ip6_encap_unregister_srcaddr(const struct srcaddrtab *);
    int ip_encap_detach(const struct encaptab *);
    int ip6_encap_detach(const struct encaptab *);
    #endif
    
    #endif /*_NETINET_IP_ENCAP_H_*/

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