1/*	$FreeBSD$	*/
2/*	$KAME: ip_encap.h,v 1.7 2000/03/25 07:23:37 sumikawa Exp $	*/
3
4/*-
5 * SPDX-License-Identifier: BSD-3-Clause
6 *
7 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
8 * Copyright (c) 2018 Andrey V. Elsukov <ae@FreeBSD.org>
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the project nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#ifndef _NETINET_IP_ENCAP_H_
37#define _NETINET_IP_ENCAP_H_
38
39#ifdef _KERNEL
40
41int	encap4_input(struct mbuf **, int *, int);
42int	encap6_input(struct mbuf **, int *, int);
43
44typedef int (*encap_lookup_t)(const struct mbuf *, int, int, void **);
45typedef int (*encap_check_t)(const struct mbuf *, int, int, void *);
46typedef int (*encap_input_t)(struct mbuf *, int, int, void *);
47typedef void (*encap_srcaddr_t)(void *, const struct sockaddr *, int);
48
49struct encap_config {
50	int		proto;		/* protocol */
51	int		min_length;	/* minimum packet length */
52	int		max_hdrsize;	/* maximum header size */
53	int		exact_match;	/* a packet is exactly matched */
54#define	ENCAP_DRV_LOOKUP	0x7fffffff
55
56	encap_lookup_t	lookup;
57	encap_check_t	check;
58	encap_input_t	input;
59
60	void		*pad[3];
61};
62
63struct encaptab;
64struct srcaddrtab;
65
66const struct encaptab *ip_encap_attach(const struct encap_config *,
67    void *arg, int mflags);
68const struct encaptab *ip6_encap_attach(const struct encap_config *,
69    void *arg, int mflags);
70
71const struct srcaddrtab *ip_encap_register_srcaddr(encap_srcaddr_t,
72    void *arg, int mflags);
73const struct srcaddrtab *ip6_encap_register_srcaddr(encap_srcaddr_t,
74    void *arg, int mflags);
75
76int ip_encap_unregister_srcaddr(const struct srcaddrtab *);
77int ip6_encap_unregister_srcaddr(const struct srcaddrtab *);
78int ip_encap_detach(const struct encaptab *);
79int ip6_encap_detach(const struct encaptab *);
80#endif
81
82#endif /*_NETINET_IP_ENCAP_H_*/
83