1/*
2 *  Universal TUN/TAP device driver.
3 *  Copyright (C) 1999-2000 Maxim Krasnyansky <max_mk@yahoo.com>
4 *
5 *  This program is free software; you can redistribute it and/or modify
6 *  it under the terms of the GNU General Public License as published by
7 *  the Free Software Foundation; either version 2 of the License, or
8 *  (at your option) any later version.
9 *
10 *  This program is distributed in the hope that it will be useful,
11 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
12 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 *  GNU General Public License for more details.
14 *
15 *  $Id: if_tun.h,v 1.1.1.1 2008/10/15 03:29:27 james26_jang Exp $
16 */
17
18#ifndef __IF_TUN_H
19#define __IF_TUN_H
20
21/* Uncomment to enable debugging */
22/* #define TUN_DEBUG 1 */
23
24#ifdef __KERNEL__
25
26#ifdef TUN_DEBUG
27#define DBG  if(tun->debug)printk
28#define DBG1 if(debug==2)printk
29#else
30#define DBG( a... )
31#define DBG1( a... )
32#endif
33
34struct tun_struct {
35	char 			*name;
36	unsigned long 		flags;
37	int			attached;
38	uid_t			owner;
39
40	wait_queue_head_t	read_wait;
41	struct sk_buff_head	readq;
42
43	struct net_device	dev;
44	struct net_device_stats	stats;
45
46	struct fasync_struct    *fasync;
47
48#ifdef TUN_DEBUG
49	int debug;
50#endif
51};
52
53#ifndef MIN
54#define MIN(a,b) ( (a)<(b) ? (a):(b) )
55#endif
56
57#endif /* __KERNEL__ */
58
59/* Read queue size */
60#define TUN_READQ_SIZE	10
61
62/* TUN device flags */
63#define TUN_TUN_DEV 	0x0001
64#define TUN_TAP_DEV	0x0002
65#define TUN_TYPE_MASK   0x000f
66
67#define TUN_FASYNC	0x0010
68#define TUN_NOCHECKSUM	0x0020
69#define TUN_NO_PI	0x0040
70#define TUN_ONE_QUEUE	0x0080
71#define TUN_PERSIST 	0x0100
72
73/* Ioctl defines */
74#define TUNSETNOCSUM  _IOW('T', 200, int)
75#define TUNSETDEBUG   _IOW('T', 201, int)
76#define TUNSETIFF     _IOW('T', 202, int)
77#define TUNSETPERSIST _IOW('T', 203, int)
78#define TUNSETOWNER   _IOW('T', 204, int)
79
80/* TUNSETIFF ifr flags */
81#define IFF_TUN		0x0001
82#define IFF_TAP		0x0002
83#define IFF_NO_PI	0x1000
84#define IFF_ONE_QUEUE	0x2000
85
86struct tun_pi {
87	unsigned short flags;
88	unsigned short proto;
89};
90#define TUN_PKT_STRIP	0x0001
91
92#endif /* __IF_TUN_H */
93