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