WvStreams
if_tun.h
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  */
16 
17 #ifndef __IF_TUN_H
18 #define __IF_TUN_H
19 
20 /* Uncomment to enable debugging */
21 /* #define TUN_DEBUG 1 */
22 
23 #ifdef __KERNEL__
24 
25 #ifdef TUN_DEBUG
26 #define DBG if(tun->debug)printk
27 #define DBG1 if(debug==2)printk
28 #else
29 #define DBG( a... )
30 #define DBG1( a... )
31 #endif
32 
33 struct tun_struct {
34  char *name;
35  unsigned long flags;
36  int attached;
37  uid_t owner;
38 
39  wait_queue_head_t read_wait;
40  struct sk_buff_head readq;
41 
42  struct net_device dev;
43  struct net_device_stats stats;
44 
45  struct fasync_struct *fasync;
46 
47 #ifdef TUN_DEBUG
48  int debug;
49 #endif
50 };
51 
52 #ifndef MIN
53 #define MIN(a,b) ( (a)<(b) ? (a):(b) )
54 #endif
55 
56 #endif /* __KERNEL__ */
57 
58 /* Read queue size */
59 #define TUN_READQ_SIZE 10
60 
61 /* TUN device flags */
62 #define TUN_TUN_DEV 0x0001
63 #define TUN_TAP_DEV 0x0002
64 #define TUN_TYPE_MASK 0x000f
65 
66 #define TUN_FASYNC 0x0010
67 #define TUN_NOCHECKSUM 0x0020
68 #define TUN_NO_PI 0x0040
69 #define TUN_ONE_QUEUE 0x0080
70 #define TUN_PERSIST 0x0100
71 
72 /* Ioctl defines */
73 #define TUNSETNOCSUM _IOW('T', 200, int)
74 #define TUNSETDEBUG _IOW('T', 201, int)
75 #define TUNSETIFF _IOW('T', 202, int)
76 #define TUNSETPERSIST _IOW('T', 203, int)
77 #define TUNSETOWNER _IOW('T', 204, int)
78 
79 /* TUNSETIFF ifr flags */
80 #define IFF_TUN 0x0001
81 #define IFF_TAP 0x0002
82 #define IFF_NO_PI 0x1000
83 #define IFF_ONE_QUEUE 0x2000
84 
85 struct tun_pi {
86  unsigned short flags;
87  unsigned short proto;
88 };
89 #define TUN_PKT_STRIP 0x0001
90 
91 #endif /* __IF_TUN_H */
tun_pi
Definition: if_tun.h:85