| 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 1.5 2000/10/24 05:13:08 maxk 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 */ |