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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 1.2 2001/06/01 18:39:47 davem 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 struct list_head list;
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 unsigned long if_flags;
49 u8 dev_addr[ETH_ALEN];
50 u32 chr_filter[2];
51 u32 net_filter[2];
52
53#ifdef TUN_DEBUG
54 int debug;
55#endif
56};
57
58#endif /* __KERNEL__ */
59
60/* Read queue size */
61#define TUN_READQ_SIZE 500
62
63/* TUN device flags */
64#define TUN_TUN_DEV 0x0001
65#define TUN_TAP_DEV 0x0002
66#define TUN_TYPE_MASK 0x000f
67
68#define TUN_FASYNC 0x0010
69#define TUN_NOCHECKSUM 0x0020
70#define TUN_NO_PI 0x0040
71#define TUN_ONE_QUEUE 0x0080
72#define TUN_PERSIST 0x0100
73
74/* Ioctl defines */
75#define TUNSETNOCSUM _IOW('T', 200, int)
76#define TUNSETDEBUG _IOW('T', 201, int)
77#define TUNSETIFF _IOW('T', 202, int)
78#define TUNSETPERSIST _IOW('T', 203, int)
79#define TUNSETOWNER _IOW('T', 204, int)
80
81/* TUNSETIFF ifr flags */
82#define IFF_TUN 0x0001
83#define IFF_TAP 0x0002
84#define IFF_NO_PI 0x1000
85#define IFF_ONE_QUEUE 0x2000
86
87struct tun_pi {
88 unsigned short flags;
89 unsigned short proto;
90};
91#define TUN_PKT_STRIP 0x0001
92
93#endif /* __IF_TUN_H */