Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
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#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 gid_t group;
40
41 wait_queue_head_t read_wait;
42 struct sk_buff_head readq;
43
44 struct net_device *dev;
45 struct net_device_stats stats;
46
47 struct fasync_struct *fasync;
48
49 unsigned long if_flags;
50 u8 dev_addr[ETH_ALEN];
51 u32 chr_filter[2];
52 u32 net_filter[2];
53
54#ifdef TUN_DEBUG
55 int debug;
56#endif
57};
58
59#endif /* __KERNEL__ */
60
61/* Read queue size */
62#define TUN_READQ_SIZE 500
63
64/* TUN device flags */
65#define TUN_TUN_DEV 0x0001
66#define TUN_TAP_DEV 0x0002
67#define TUN_TYPE_MASK 0x000f
68
69#define TUN_FASYNC 0x0010
70#define TUN_NOCHECKSUM 0x0020
71#define TUN_NO_PI 0x0040
72#define TUN_ONE_QUEUE 0x0080
73#define TUN_PERSIST 0x0100
74
75/* Ioctl defines */
76#define TUNSETNOCSUM _IOW('T', 200, int)
77#define TUNSETDEBUG _IOW('T', 201, int)
78#define TUNSETIFF _IOW('T', 202, int)
79#define TUNSETPERSIST _IOW('T', 203, int)
80#define TUNSETOWNER _IOW('T', 204, int)
81#define TUNSETLINK _IOW('T', 205, int)
82#define TUNSETGROUP _IOW('T', 206, int)
83
84/* TUNSETIFF ifr flags */
85#define IFF_TUN 0x0001
86#define IFF_TAP 0x0002
87#define IFF_NO_PI 0x1000
88#define IFF_ONE_QUEUE 0x2000
89
90struct tun_pi {
91 unsigned short flags;
92 unsigned short proto;
93};
94#define TUN_PKT_STRIP 0x0001
95
96#endif /* __IF_TUN_H */