/*      $FreeBSD: src/sys/netinet/in_gif.h,v 1.3.2.4 2002/11/08 16:57:13 ume Exp $      */
/*      $DragonFly: src/sys/netinet/in_gif.h,v 1.5 2006/05/20 02:42:12 dillon Exp $     */
/*      $KAME: in_gif.h,v 1.5 2000/04/14 08:36:02 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.
 */

#ifndef _NETINET_IN_GIF_H_
#define _NETINET_IN_GIF_H_

#define GIF_TTL         30

extern int ip_gif_ttl;

struct gif_softc;
struct mbuf;
struct ifnet;

int in_gif_input (struct mbuf **, int *, int);
int in_gif_output (struct ifnet *, int, struct mbuf *);
int gif_encapcheck4 (const struct mbuf *, int, int, void *);
int in_gif_attach (struct gif_softc *);
int in_gif_detach (struct gif_softc *);

#endif /*_NETINET_IN_GIF_H_*/