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/*
* 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 1.1 2000/08/23 05:59:28 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 {
char name[8];
unsigned long flags;
struct fasync_struct *fasync;
wait_queue_head_t read_wait;
struct net_device dev;
struct sk_buff_head txq;
struct net_device_stats stats;
#ifdef TUN_DEBUG
int debug;
#endif
};
#ifndef MIN
#define MIN(a,b) ( (a)<(b) ? (a):(b) )
#endif
#endif /* __KERNEL__ */
/* Number of devices */
#define TUN_MAX_DEV 255
/* TX queue size */
#define TUN_TXQ_SIZE 10
/* Max frame size */
#define TUN_MAX_FRAME 4096
/* 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_IFF_SET 0x1000
/* Ioctl defines */
#define TUNSETNOCSUM (('T'<< 8) | 200)
#define TUNSETDEBUG (('T'<< 8) | 201)
#define TUNSETIFF (('T'<< 8) | 202)
/* TUNSETIFF ifr flags */
#define IFF_TUN 0x0001
#define IFF_TAP 0x0002
#define IFF_NO_PI 0x1000
struct tun_pi {
unsigned short flags;
unsigned short proto;
};
#define TUN_PKT_STRIP 0x0001
#endif /* __IF_TUN_H */
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