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 1.1.1.1 2008/10/15 03:29:27 james26_jang 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 34struct tun_struct { 35 char *name; 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#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 59/* Read queue size */ 60#define TUN_READQ_SIZE 10 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 70#define TUN_ONE_QUEUE 0x0080 71#define TUN_PERSIST 0x0100 72 73/* Ioctl defines */ 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) 79 80/* TUNSETIFF ifr flags */ 81#define IFF_TUN 0x0001 82#define IFF_TAP 0x0002 83#define IFF_NO_PI 0x1000 84#define IFF_ONE_QUEUE 0x2000 85 86struct tun_pi { 87 unsigned short flags; 88 unsigned short proto; 89}; 90#define TUN_PKT_STRIP 0x0001 91 92#endif /* __IF_TUN_H */ 93