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; tun_get_socket(struct file * f)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