summaryrefslogtreecommitdiffstats
path: root/sys/net/if_gif.h
blob: ed143e87c70666519198d9d8d36eab0c537e0df0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
/*	$FreeBSD$	*/
/*	$KAME: if_gif.h,v 1.17 2000/09/11 11:36:41 sumikawa 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 _NET_IF_GIF_H_
#define _NET_IF_GIF_H_

#ifdef _KERNEL
#include "opt_inet.h"
#include "opt_inet6.h"

#include <netinet/in.h>

struct ip;
struct ip6_hdr;
struct encaptab;

extern	void (*ng_gif_input_p)(struct ifnet *ifp, struct mbuf **mp,
		int af);
extern	void (*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m,
		int af);
extern	int  (*ng_gif_output_p)(struct ifnet *ifp, struct mbuf **mp);
extern	void (*ng_gif_attach_p)(struct ifnet *ifp);
extern	void (*ng_gif_detach_p)(struct ifnet *ifp);

struct gif_softc {
	struct ifnet		*gif_ifp;
	struct rmlock		gif_lock;
	const struct encaptab	*gif_ecookie;
	int			gif_family;
	int			gif_flags;
	u_int			gif_fibnum;
	u_int			gif_options;
	void			*gif_netgraph;	/* netgraph node info */
	union {
		void		*hdr;
		struct ip	*iphdr;
#ifdef INET6
		struct ip6_hdr	*ip6hdr;
#endif
	} gif_uhdr;
	LIST_ENTRY(gif_softc)	gif_list; /* all gif's are linked */
};
#define	GIF2IFP(sc)	((sc)->gif_ifp)
#define	GIF_LOCK_INIT(sc)	rm_init(&(sc)->gif_lock, "gif softc")
#define	GIF_LOCK_DESTROY(sc)	rm_destroy(&(sc)->gif_lock)
#define	GIF_RLOCK_TRACKER	struct rm_priotracker gif_tracker
#define	GIF_RLOCK(sc)		rm_rlock(&(sc)->gif_lock, &gif_tracker)
#define	GIF_RUNLOCK(sc)		rm_runlock(&(sc)->gif_lock, &gif_tracker)
#define	GIF_RLOCK_ASSERT(sc)	rm_assert(&(sc)->gif_lock, RA_RLOCKED)
#define	GIF_WLOCK(sc)		rm_wlock(&(sc)->gif_lock)
#define	GIF_WUNLOCK(sc)		rm_wunlock(&(sc)->gif_lock)
#define	GIF_WLOCK_ASSERT(sc)	rm_assert(&(sc)->gif_lock, RA_WLOCKED)

#define	gif_iphdr	gif_uhdr.iphdr
#define	gif_hdr		gif_uhdr.hdr
#ifdef INET6
#define	gif_ip6hdr	gif_uhdr.ip6hdr
#endif

#define GIF_MTU		(1280)	/* Default MTU */
#define	GIF_MTU_MIN	(1280)	/* Minimum MTU */
#define	GIF_MTU_MAX	(8192)	/* Maximum MTU */

struct etherip_header {
#if BYTE_ORDER == LITTLE_ENDIAN
	u_int	eip_resvl:4,	/* reserved */
		eip_ver:4;	/* version */
#endif
#if BYTE_ORDER == BIG_ENDIAN
	u_int	eip_ver:4,	/* version */
		eip_resvl:4;	/* reserved */
#endif
	u_int8_t eip_resvh;	/* reserved */
} __packed;

#define ETHERIP_VERSION			0x3
/* mbuf adjust factor to force 32-bit alignment of IP header */
#define	ETHERIP_ALIGN		2

/* Prototypes */
void gif_input(struct mbuf *, struct ifnet *, int, uint8_t);
int gif_output(struct ifnet *, struct mbuf *, const struct sockaddr *,
	       struct route *);
int gif_encapcheck(const struct mbuf *, int, int, void *);
#ifdef INET
int in_gif_output(struct ifnet *, struct mbuf *, int, uint8_t);
int in_gif_encapcheck(const struct mbuf *, int, int, void *);
int in_gif_attach(struct gif_softc *);
#endif
#ifdef INET6
int in6_gif_output(struct ifnet *, struct mbuf *, int, uint8_t);
int in6_gif_encapcheck(const struct mbuf *, int, int, void *);
int in6_gif_attach(struct gif_softc *);
#endif
#endif /* _KERNEL */

#define GIFGOPTS	_IOWR('i', 150, struct ifreq)
#define GIFSOPTS	_IOW('i', 151, struct ifreq)

#define	GIF_ACCEPT_REVETHIP	0x0001
#define	GIF_IGNORE_SOURCE	0x0002
#define	GIF_SEND_REVETHIP	0x0010
#define	GIF_OPTMASK		(GIF_ACCEPT_REVETHIP|GIF_SEND_REVETHIP| \
    GIF_IGNORE_SOURCE)

#endif /* _NET_IF_GIF_H_ */
OpenPOWER on IntegriCloud