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