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 #ifndef __IF_TUN_H
  16 #define __IF_TUN_H
  17
  18 #include <uapi/linux/if_tun.h>
  19
  20 #if defined(CONFIG_TUN) || defined(CONFIG_TUN_MODULE)
  21 struct socket *tun_get_socket(struct file *);
  22 #else
  23 #include <linux/err.h>
  24 #include <linux/errno.h>
  25 struct file;
  26 struct socket;
  27 static inline struct socket *tun_get_socket(struct file *f)
  28 {
  29         return ERR_PTR(-EINVAL);
  30 }
  31 #endif /* CONFIG_TUN */
  32 #endif /* __IF_TUN_H */