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4efd681a SE |
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 | * | |
df1b18fc | 15 | * $Id: if_tun.h,v 1.2 2001/06/01 18:39:47 davem Exp $ |
4efd681a SE |
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 { | |
df1b18fc | 35 | char *name; |
4efd681a | 36 | unsigned long flags; |
df1b18fc SE |
37 | int attached; |
38 | uid_t owner; | |
4efd681a | 39 | |
4efd681a | 40 | wait_queue_head_t read_wait; |
df1b18fc | 41 | struct sk_buff_head readq; |
4efd681a SE |
42 | |
43 | struct net_device dev; | |
df1b18fc SE |
44 | struct net_device_stats stats; |
45 | ||
46 | struct fasync_struct *fasync; | |
4efd681a SE |
47 | |
48 | #ifdef TUN_DEBUG | |
49 | int debug; | |
50 | #endif | |
51 | }; | |
52 | ||
53 | #ifndef MIN | |
54 | #define MIN(a,b) ( (a)<(b) ? (a):(b) ) | |
55 | #endif | |
56 | ||
57 | #endif /* __KERNEL__ */ | |
58 | ||
df1b18fc SE |
59 | /* Read queue size */ |
60 | #define TUN_READQ_SIZE 10 | |
4efd681a SE |
61 | |
62 | /* TUN device flags */ | |
63 | #define TUN_TUN_DEV 0x0001 | |
64 | #define TUN_TAP_DEV 0x0002 | |
65 | #define TUN_TYPE_MASK 0x000f | |
66 | ||
67 | #define TUN_FASYNC 0x0010 | |
68 | #define TUN_NOCHECKSUM 0x0020 | |
69 | #define TUN_NO_PI 0x0040 | |
df1b18fc SE |
70 | #define TUN_ONE_QUEUE 0x0080 |
71 | #define TUN_PERSIST 0x0100 | |
4efd681a SE |
72 | |
73 | /* Ioctl defines */ | |
df1b18fc SE |
74 | #define TUNSETNOCSUM _IOW('T', 200, int) |
75 | #define TUNSETDEBUG _IOW('T', 201, int) | |
76 | #define TUNSETIFF _IOW('T', 202, int) | |
77 | #define TUNSETPERSIST _IOW('T', 203, int) | |
78 | #define TUNSETOWNER _IOW('T', 204, int) | |
4efd681a SE |
79 | |
80 | /* TUNSETIFF ifr flags */ | |
81 | #define IFF_TUN 0x0001 | |
82 | #define IFF_TAP 0x0002 | |
83 | #define IFF_NO_PI 0x1000 | |
df1b18fc | 84 | #define IFF_ONE_QUEUE 0x2000 |
4efd681a SE |
85 | |
86 | struct tun_pi { | |
df1b18fc SE |
87 | unsigned short flags; |
88 | unsigned short proto; | |
4efd681a SE |
89 | }; |
90 | #define TUN_PKT_STRIP 0x0001 | |
91 | ||
92 | #endif /* __IF_TUN_H */ |