if_gif.h revision 127898 
1/*	$FreeBSD: head/sys/net/if_gif.h 127898 2004-04-05 16:55:15Z ru $	*/
2/*	$KAME: if_gif.h,v 1.17 2000/09/11 11:36:41 sumikawa 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/*
34 * if_gif.h
35 */
36
37#ifndef _NET_IF_GIF_H_
38#define _NET_IF_GIF_H_
39
40
41#ifdef _KERNEL
42#include "opt_inet.h"
43#include "opt_inet6.h"
44
45#include <netinet/in.h>
46/* xxx sigh, why route have struct route instead of pointer? */
47
48struct encaptab;
49
50extern	void (*ng_gif_input_p)(struct ifnet *ifp, struct mbuf **mp,
51		int af);
52extern	void (*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m,
53		int af);
54extern	int  (*ng_gif_output_p)(struct ifnet *ifp, struct mbuf **mp);
55extern	void (*ng_gif_attach_p)(struct ifnet *ifp);
56extern	void (*ng_gif_detach_p)(struct ifnet *ifp);
57
58struct gif_softc {
59	struct ifnet	gif_if;	   /* common area - must be at the top */
60	struct sockaddr	*gif_psrc; /* Physical src addr */
61	struct sockaddr	*gif_pdst; /* Physical dst addr */
62	union {
63		struct route  gifscr_ro;    /* xxx */
64#ifdef INET6
65		struct route_in6 gifscr_ro6; /* xxx */
66#endif
67	} gifsc_gifscr;
68	int		gif_flags;
69	const struct encaptab *encap_cookie4;
70	const struct encaptab *encap_cookie6;
71	void		*gif_netgraph;	/* ng_gif(4) netgraph node info */
72	LIST_ENTRY(gif_softc) gif_list; /* all gif's are linked */
73};
74
75#define gif_ro gifsc_gifscr.gifscr_ro
76#ifdef INET6
77#define gif_ro6 gifsc_gifscr.gifscr_ro6
78#endif
79
80#define GIF_MTU		(1280)	/* Default MTU */
81#define	GIF_MTU_MIN	(1280)	/* Minimum MTU */
82#define	GIF_MTU_MAX	(8192)	/* Maximum MTU */
83
84#define	MTAG_GIF	1080679712
85#define	MTAG_GIF_CALLED	0
86
87/* Prototypes */
88void gifattach0(struct gif_softc *);
89void gif_input(struct mbuf *, int, struct ifnet *);
90int gif_output(struct ifnet *, struct mbuf *, struct sockaddr *,
91	       struct rtentry *);
92int gif_ioctl(struct ifnet *, u_long, caddr_t);
93int gif_set_tunnel(struct ifnet *, struct sockaddr *, struct sockaddr *);
94void gif_delete_tunnel(struct ifnet *);
95int gif_encapcheck(const struct mbuf *, int, int, void *);
96
97#endif /* _KERNEL */
98
99#endif /* _NET_IF_GIF_H_ */
100