include/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 1.2 2001/06/01 18:39:47 davem Exp $
  16  */
  17
  18 #ifndef __IF_TUN_H
  19 #define __IF_TUN_H
  20
  21 #include <linux/types.h>
  22
  23 /* Read queue size */
  24 #define TUN_READQ_SIZE  500
  25
  26 /* TUN device flags */
  27 #define TUN_TUN_DEV     0x0001
  28 #define TUN_TAP_DEV     0x0002
  29 #define TUN_TYPE_MASK   0x000f
  30
  31 #define TUN_FASYNC      0x0010
  32 #define TUN_NOCHECKSUM  0x0020
  33 #define TUN_NO_PI       0x0040
  34 #define TUN_ONE_QUEUE   0x0080
  35 #define TUN_PERSIST     0x0100
  36
  37 /* Ioctl defines */
  38 #define TUNSETNOCSUM  _IOW('T', 200, int)
  39 #define TUNSETDEBUG   _IOW('T', 201, int)
  40 #define TUNSETIFF     _IOW('T', 202, int)
  41 #define TUNSETPERSIST _IOW('T', 203, int)
  42 #define TUNSETOWNER   _IOW('T', 204, int)
  43 #define TUNSETLINK    _IOW('T', 205, int)
  44 #define TUNSETGROUP   _IOW('T', 206, int)
  45
  46 /* TUNSETIFF ifr flags */
  47 #define IFF_TUN         0x0001
  48 #define IFF_TAP         0x0002
  49 #define IFF_NO_PI       0x1000
  50 #define IFF_ONE_QUEUE   0x2000
  51
  52 struct tun_pi {
  53         unsigned short flags;
  54         __be16 proto;
  55 };
  56 #define TUN_PKT_STRIP   0x0001
  57
  58 #endif /* __IF_TUN_H */