Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
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 1.2 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#include <linux/types.h>
25
26#ifdef __KERNEL__
27
28#ifdef TUN_DEBUG
29#define DBG if(tun->debug)printk
30#define DBG1 if(debug==2)printk
31#else
32#define DBG( a... )
33#define DBG1( a... )
34#endif
35
36struct tun_struct {
37 struct list_head list;
38 unsigned long flags;
39 int attached;
40 uid_t owner;
41 gid_t group;
42
43 wait_queue_head_t read_wait;
44 struct sk_buff_head readq;
45
46 struct net_device *dev;
47
48 struct fasync_struct *fasync;
49
50 unsigned long if_flags;
51 u8 dev_addr[ETH_ALEN];
52 u32 chr_filter[2];
53 u32 net_filter[2];
54
55#ifdef TUN_DEBUG
56 int debug;
57#endif
58};
59
60#endif /* __KERNEL__ */
61
62/* Read queue size */
63#define TUN_READQ_SIZE 500
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#define TUN_ONE_QUEUE 0x0080
74#define TUN_PERSIST 0x0100
75
76/* Ioctl defines */
77#define TUNSETNOCSUM _IOW('T', 200, int)
78#define TUNSETDEBUG _IOW('T', 201, int)
79#define TUNSETIFF _IOW('T', 202, int)
80#define TUNSETPERSIST _IOW('T', 203, int)
81#define TUNSETOWNER _IOW('T', 204, int)
82#define TUNSETLINK _IOW('T', 205, int)
83#define TUNSETGROUP _IOW('T', 206, int)
84
85/* TUNSETIFF ifr flags */
86#define IFF_TUN 0x0001
87#define IFF_TAP 0x0002
88#define IFF_NO_PI 0x1000
89#define IFF_ONE_QUEUE 0x2000
90
91struct tun_pi {
92 unsigned short flags;
93 __be16 proto;
94};
95#define TUN_PKT_STRIP 0x0001
96
97#endif /* __IF_TUN_H */