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 2000/08/23 05:59:28 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
34 struct tun_struct {
35 char name[8];
36 unsigned long flags;
37
38 struct fasync_struct *fasync;
39 wait_queue_head_t read_wait;
40
41 struct net_device dev;
42 struct sk_buff_head txq;
43 struct net_device_stats stats;
44
45 #ifdef TUN_DEBUG
46 int debug;
47 #endif
48 };
49
50 #ifndef MIN
51 #define MIN(a,b) ( (a)<(b) ? (a):(b) )
52 #endif
53
54 #endif /* __KERNEL__ */
55
56 /* Number of devices */
57 #define TUN_MAX_DEV 255
58
59 /* TX queue size */
60 #define TUN_TXQ_SIZE 10
61
62 /* Max frame size */
63 #define TUN_MAX_FRAME 4096
64
65 /* TUN device flags */
66 #define TUN_TUN_DEV 0x0001
67 #define TUN_TAP_DEV 0x0002
68 #define TUN_TYPE_MASK 0x000f
69
70 #define TUN_FASYNC 0x0010
71 #define TUN_NOCHECKSUM 0x0020
72 #define TUN_NO_PI 0x0040
73
74 #define TUN_IFF_SET 0x1000
75
76 /* Ioctl defines */
77 #define TUNSETNOCSUM (('T'<< 8) | 200)
78 #define TUNSETDEBUG (('T'<< 8) | 201)
79 #define TUNSETIFF (('T'<< 8) | 202)
80
81 /* TUNSETIFF ifr flags */
82 #define IFF_TUN 0x0001
83 #define IFF_TAP 0x0002
84 #define IFF_NO_PI 0x1000
85
86 struct tun_pi {
87 unsigned short flags;
88 unsigned short proto;
89 };
90 #define TUN_PKT_STRIP 0x0001
91
92 #endif /* __IF_TUN_H */
93
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