/* * Universal TUN/TAP device driver. * Copyright (C) 1999-2000 Maxim Krasnyansky <max_mk@yahoo.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * $Id: if_tun.h,v 1.2 2001/06/01 18:39:47 davem Exp $ */ #ifndef __IF_TUN_H #define __IF_TUN_H /* Uncomment to enable debugging */ /* #define TUN_DEBUG 1 */ #ifdef __KERNEL__ #ifdef TUN_DEBUG #define DBG if(tun->debug)printk #define DBG1 if(debug==2)printk #else #define DBG( a... ) #define DBG1( a... ) #endif struct tun_struct { struct list_head list; unsigned long flags; int attached; uid_t owner; wait_queue_head_t read_wait; struct sk_buff_head readq; struct net_device *dev; struct net_device_stats stats; struct fasync_struct *fasync; unsigned long if_flags; u8 dev_addr[ETH_ALEN]; u32 chr_filter[2]; u32 net_filter[2]; #ifdef TUN_DEBUG int debug; #endif }; #endif /* __KERNEL__ */ /* Read queue size */ #define TUN_READQ_SIZE 500 /* TUN device flags */ #define TUN_TUN_DEV 0x0001 #define TUN_TAP_DEV 0x0002 #define TUN_TYPE_MASK 0x000f #define TUN_FASYNC 0x0010 #define TUN_NOCHECKSUM 0x0020 #define TUN_NO_PI 0x0040 #define TUN_ONE_QUEUE 0x0080 #define TUN_PERSIST 0x0100 /* Ioctl defines */ #define TUNSETNOCSUM _IOW('T', 200, int) #define TUNSETDEBUG _IOW('T', 201, int) #define TUNSETIFF _IOW('T', 202, int) #define TUNSETPERSIST _IOW('T', 203, int) #define TUNSETOWNER _IOW('T', 204, int) /* TUNSETIFF ifr flags */ #define IFF_TUN 0x0001 #define IFF_TAP 0x0002 #define IFF_NO_PI 0x1000 #define IFF_ONE_QUEUE 0x2000 struct tun_pi { unsigned short flags; unsigned short proto; }; #define TUN_PKT_STRIP 0x0001 #endif /* __IF_TUN_H */