LXR linux/include/linux/if

   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)
  21struct socket *tun_get_socket(struct file *);
  22#else
  23#include <linux/err.h>
  24#include <linux/errno.h>
  25struct file;
  26struct socket;
  27static 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 */
  33