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 #define TUNSETLINK _IOW('T', 205, int) 81 82 /* TUNSETIFF ifr flags */ 83 #define IFF_TUN 0x0001 84 #define IFF_TAP 0x0002 85 #define IFF_NO_PI 0x1000 86 #define IFF_ONE_QUEUE 0x2000 87 88 struct tun_pi { 89 unsigned short flags; 90 unsigned short proto; 91 }; 92 #define TUN_PKT_STRIP 0x0001 93 94 #endif /* __IF_TUN_H */ 95