1/*	$NetBSD: in6_gif.h,v 1.18 2019/10/30 03:45:59 knakahara Exp $	*/
2/*	$KAME: in6_gif.h,v 1.7 2001/07/26 06:53:16 jinmei Exp $	*/
3
4/*
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#ifndef _NETINET6_IN6_GIF_H_
34#define _NETINET6_IN6_GIF_H_
35
36#define GIF_HLIM	30
37extern int	ip6_gif_hlim;		/* Hop limit for gif encap packet */
38extern int	ip6_gif_pmtu;		/* Default Path MTU setting for gif tunnels */
39
40#define GIF_PMTU_SYSDEFAULT	-1	/* Use system default value (ip6_gif_pmtu) */
41#define GIF_PMTU_MINMTU		0	/* Fragmented by IPV6_MINMTU */
42#define GIF_PMTU_OUTERMTU	1	/* Fragmented by Path MTU of outer path */
43
44struct gif_variant;
45struct sockaddr;
46int in6_gif_input(struct mbuf **, int *, int, void *);
47#ifdef GIF_ENCAPCHECK
48int gif_encapcheck6(struct mbuf *, int, int, struct gif_variant *);
49#endif
50int in6_gif_attach(struct gif_variant *);
51int in6_gif_detach(struct gif_variant *);
52void *in6_gif_ctlinput(int, const struct sockaddr *, void *, void *);
53
54#endif /* !_NETINET6_IN6_GIF_H_ */
55