tun.h revision 31921
1169695Skan/*- 2169695Skan * Copyright (c) 1997 Brian Somers <brian@Awfulhak.org> 3169695Skan * All rights reserved. 4169695Skan * 5169695Skan * Redistribution and use in source and binary forms, with or without 6169695Skan * modification, are permitted provided that the following conditions 7169695Skan * are met: 8169695Skan * 1. Redistributions of source code must retain the above copyright 9169695Skan * notice, this list of conditions and the following disclaimer. 10169695Skan * 2. Redistributions in binary form must reproduce the above copyright 11169695Skan * notice, this list of conditions and the following disclaimer in the 12169695Skan * documentation and/or other materials provided with the distribution. 13169695Skan * 14169695Skan * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15169695Skan * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16169695Skan * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17169695Skan * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18169695Skan * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19169695Skan * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20169695Skan * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21169695Skan * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22169695Skan * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23169695Skan * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24169695Skan * SUCH DAMAGE. 25169695Skan * 26169695Skan * $Id$ 27169695Skan */ 28169695Skan 29169695Skanstruct tun_data { 30169695Skan#ifdef __OpenBSD__ 31169695Skan struct tunnel_header head; 32169695Skan#endif 33169695Skan u_char data[MAX_MRU]; 34169695Skan}; 35169695Skan 36169695Skan#ifdef __OpenBSD__ 37169695Skan#define tun_fill_header(f,proto) do { (f).head.tun_af = (proto); } while (0) 38169695Skan#define tun_check_header(f,proto) ((f).head.tun_af == (proto)) 39169695Skan#else 40169695Skan#define tun_fill_header(f,proto) do { } while (0) 41169695Skan#define tun_check_header(f,proto) (1) 42169695Skan#endif 43169695Skan 44169695Skanextern void tun_configure(int, int); 45169695Skan