| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 34 | struct tun_struct { |
| 35 | struct list_head list; |
| 36 | unsigned long flags; |
| 37 | int attached; |
| 38 | uid_t owner; |
| 39 | |
| 40 | wait_queue_head_t read_wait; |
| 41 | struct sk_buff_head readq; |
| 42 | |
| 43 | struct net_device *dev; |
| 44 | struct net_device_stats stats; |
| 45 | |
| 46 | struct fasync_struct *fasync; |
| 47 | |
| 48 | unsigned long if_flags; |
| 49 | u8 dev_addr[ETH_ALEN]; |
| 50 | u32 chr_filter[2]; |
| 51 | u32 net_filter[2]; |
| 52 | |
| 53 | #ifdef TUN_DEBUG |
| 54 | int debug; |
| 55 | #endif |
| 56 | }; |
| 57 | |
| 58 | #endif /* __KERNEL__ */ |
| 59 | |
| 60 | /* Read queue size */ |
| 61 | #define TUN_READQ_SIZE 500 |
| 62 | |
| 63 | /* TUN device flags */ |
| 64 | #define TUN_TUN_DEV 0x0001 |
| 65 | #define TUN_TAP_DEV 0x0002 |
| 66 | #define TUN_TYPE_MASK 0x000f |
| 67 | |
| 68 | #define TUN_FASYNC 0x0010 |
| 69 | #define TUN_NOCHECKSUM 0x0020 |
| 70 | #define TUN_NO_PI 0x0040 |
| 71 | #define TUN_ONE_QUEUE 0x0080 |
| 72 | #define TUN_PERSIST 0x0100 |
| 73 | |
| 74 | /* Ioctl defines */ |
| 75 | #define TUNSETNOCSUM _IOW('T', 200, int) |
| 76 | #define TUNSETDEBUG _IOW('T', 201, int) |
| 77 | #define TUNSETIFF _IOW('T', 202, int) |
| 78 | #define TUNSETPERSIST _IOW('T', 203, int) |
| 79 | #define TUNSETOWNER _IOW('T', 204, int) |
| 80 | |
| 81 | /* TUNSETIFF ifr flags */ |
| 82 | #define IFF_TUN 0x0001 |
| 83 | #define IFF_TAP 0x0002 |
| 84 | #define IFF_NO_PI 0x1000 |
| 85 | #define IFF_ONE_QUEUE 0x2000 |
| 86 | |
| 87 | struct tun_pi { |
| 88 | unsigned short flags; |
| 89 | unsigned short proto; |
| 90 | }; |
| 91 | #define TUN_PKT_STRIP 0x0001 |
| 92 | |
| 93 | #endif /* __IF_TUN_H */ |