bsd/net/if_tun.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*      $NetBSD: if_tun.h,v 1.5 1994/06/29 06:36:27 cgd Exp $   */
  23
  24 /*
  25  * Copyright (c) 1988, Julian Onions <jpo@cs.nott.ac.uk>
  26  * Nottingham University 1987.
  27  *
  28  * This source may be freely distributed, however I would be interested
  29  * in any changes that are made.
  30  *
  31  * This driver takes packets off the IP i/f and hands them up to a
  32  * user process to have its wicked way with. This driver has it's
  33  * roots in a similar driver written by Phil Cockcroft (formerly) at
  34  * UCL. This driver is based much more on read/write/select mode of
  35  * operation though.
  36  *
  37  */
  38
  39 #ifndef _NET_IF_TUN_H_
  40 #define _NET_IF_TUN_H_
  41 #include <sys/appleapiopts.h>
  42 #ifdef __APPLE_API_PRIVATE
  43
  44 /* Refer to if_tunvar.h for the softc stuff */
  45
  46 /* Maximum transmit packet size (default) */
  47 #define TUNMTU          1500
  48
  49 /* Maximum receive packet size (hard limit) */
  50 #define TUNMRU          16384
  51
  52 struct tuninfo {
  53         int     baudrate;               /* linespeed */
  54         short   mtu;                    /* maximum transmission unit */
  55         u_char  type;                   /* ethernet, tokenring, etc. */
  56         u_char  dummy;                  /* place holder */
  57 };
  58
  59 /* ioctl's for get/set debug */
  60 #define TUNSDEBUG       _IOW('t', 90, int)
  61 #define TUNGDEBUG       _IOR('t', 89, int)
  62 #define TUNSIFINFO      _IOW('t', 91, struct tuninfo)
  63 #define TUNGIFINFO      _IOR('t', 92, struct tuninfo)
  64
  65 #endif /* __APPLE_API_PRIVATE */
  66 #endif /* !_NET_IF_TUN_H_ */