125401Sjb/*	$KAME: ip_encap.h,v 1.7 2000/03/25 07:23:37 sumikawa Exp $	*/
250476Speter
31573Srgrimes/*-
4262722Smarcel * SPDX-License-Identifier: BSD-3-Clause
51573Srgrimes *
61573Srgrimes * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
71573Srgrimes * Copyright (c) 2018 Andrey V. Elsukov <ae@FreeBSD.org>
814272Spst * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the project nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#ifndef _NETINET_IP_ENCAP_H_
36#define _NETINET_IP_ENCAP_H_
37
38#ifdef _KERNEL
39
40int	encap4_input(struct mbuf **, int *, int);
41int	encap6_input(struct mbuf **, int *, int);
42
43typedef int (*encap_lookup_t)(const struct mbuf *, int, int, void **);
44typedef int (*encap_check_t)(const struct mbuf *, int, int, void *);
45typedef int (*encap_input_t)(struct mbuf *, int, int, void *);
46typedef void (*encap_srcaddr_t)(void *, const struct sockaddr *, int);
47
48struct encap_config {
49	int		proto;		/* protocol */
50	int		min_length;	/* minimum packet length */
51	int		max_hdrsize;	/* maximum header size */
52	int		exact_match;	/* a packet is exactly matched */
53#define	ENCAP_DRV_LOOKUP	0x7fffffff
54
55	encap_lookup_t	lookup;
56	encap_check_t	check;
57	encap_input_t	input;
58
59	void		*pad[3];
60};
61
62struct encaptab;
63struct srcaddrtab;
64
65const struct encaptab *ip_encap_attach(const struct encap_config *,
66    void *arg, int mflags);
67const struct encaptab *ip6_encap_attach(const struct encap_config *,
68    void *arg, int mflags);
69
70const struct srcaddrtab *ip_encap_register_srcaddr(encap_srcaddr_t,
71    void *arg, int mflags);
72const struct srcaddrtab *ip6_encap_register_srcaddr(encap_srcaddr_t,
73    void *arg, int mflags);
74
75int ip_encap_unregister_srcaddr(const struct srcaddrtab *);
76int ip6_encap_unregister_srcaddr(const struct srcaddrtab *);
77int ip_encap_detach(const struct encaptab *);
78int ip6_encap_detach(const struct encaptab *);
79#endif
80
81#endif /*_NETINET_IP_ENCAP_H_*/
82