mdw@git.distorted.org.uk Git - secnet/blob - linux/if_tun.h

   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 2001/11/21 14:54:03 steve 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
  34 struct 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
  86 struct tun_pi {
  87         unsigned short flags;
  88         unsigned short proto;
  89 };
  90 #define TUN_PKT_STRIP   0x0001
  91
  92 #endif /* __IF_TUN_H */