FreeBSD/Linux Kernel Cross Reference
sys/net/if_tun.h

     /*      $OpenBSD: if_tun.h,v 1.15 2007/02/06 10:49:40 claudio Exp $     */
     
     /*
      * Copyright (c) 1988, Julian Onions <Julian.Onions@nexor.co.uk>
      * Nottingham University 1987.
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     */
    
    #ifndef _NET_IF_TUN_H_
    #define _NET_IF_TUN_H_
    
    #include <sys/ioccom.h>
    
    #define TUN_OPEN        0x0001
    #define TUN_INITED      0x0002
    #define TUN_RCOLL       0x0004  /* unused */
    #define TUN_IASET       0x0008
    #define TUN_DSTADDR     0x0010
    #define TUN_RWAIT       0x0040
    #define TUN_ASYNC       0x0080
    #define TUN_NBIO        0x0100
    #define TUN_BRDADDR     0x0200
    #define TUN_STAYUP      0x0400
    #define TUN_LAYER2      0x0800
    
    #define TUN_READY       (TUN_OPEN | TUN_INITED)
    
    /* Maximum packet size */
    #define TUNMTU          3000
    
    /* Maximum receive packet size (hard limit) */
    #define TUNMRU          16384
    
    /* iface info */
    struct tuninfo {
            u_int   mtu;
            u_short type;
            u_short flags;
            u_int   baudrate;
    };
    #define TUNSIFINFO      _IOW('t', 91, struct tuninfo)
    #define TUNGIFINFO      _IOR('t', 92, struct tuninfo)
    
    /* ioctl for changing the broadcast/point-to-point status */
    #define TUNSIFMODE      _IOW('t', 93, int)
    
    /* ioctl's for get/set debug */
    #define TUNSDEBUG       _IOW('t', 94, int)
    #define TUNGDEBUG       _IOR('t', 95, int)
    
    #endif /* _NET_IF_TUN_H_ */

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