1 /* 2 * Universal TUN/TAP device driver. 3 * Copyright (C) 1999-2000 Maxim Krasnyansky <[email protected]> 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 #include <linux/types.h> 25 26 #ifdef __KERNEL__ 27 28 #ifdef TUN_DEBUG 29 #define DBG if(tun->debug)printk 30 #define DBG1 if(debug==2)printk 31 #else 32 #define DBG( a... ) 33 #define DBG1( a... ) 34 #endif 35 36 struct tun_struct { 37 struct list_head list; 38 unsigned long flags; 39 int attached; 40 uid_t owner; 41 gid_t group; 42 43 wait_queue_head_t read_wait; 44 struct sk_buff_head readq; 45 46 struct net_device *dev; 47 48 struct fasync_struct *fasync; 49 50 unsigned long if_flags; 51 u8 dev_addr[ETH_ALEN]; 52 u32 chr_filter[2]; 53 u32 net_filter[2]; 54 55 #ifdef TUN_DEBUG 56 int debug; 57 #endif 58 }; 59 60 #endif /* __KERNEL__ */ 61 62 /* Read queue size */ 63 #define TUN_READQ_SIZE 500 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 #define TUN_ONE_QUEUE 0x0080 74 #define TUN_PERSIST 0x0100 75 76 /* Ioctl defines */ 77 #define TUNSETNOCSUM _IOW('T', 200, int) 78 #define TUNSETDEBUG _IOW('T', 201, int) 79 #define TUNSETIFF _IOW('T', 202, int) 80 #define TUNSETPERSIST _IOW('T', 203, int) 81 #define TUNSETOWNER _IOW('T', 204, int) 82 #define TUNSETLINK _IOW('T', 205, int) 83 #define TUNSETGROUP _IOW('T', 206, int) 84 85 /* TUNSETIFF ifr flags */ 86 #define IFF_TUN 0x0001 87 #define IFF_TAP 0x0002 88 #define IFF_NO_PI 0x1000 89 #define IFF_ONE_QUEUE 0x2000 90 91 struct tun_pi { 92 unsigned short flags; 93 __be16 proto; 94 }; 95 #define TUN_PKT_STRIP 0x0001 96 97 #endif /* __IF_TUN_H */ 98