bsd/netinet/if_tun.h

   1 /*
   2  * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /* Copyright (c) 1997 Apple Computer, Inc. All Rights Reserved */
  31 /*
  32  * Copyright (c) 1988, Julian Onions <jpo@cs.nott.ac.uk>
  33  * Nottingham University 1987.
  34  *
  35  * This source may be freely distributed, however I would be interested
  36  * in any changes that are made.
  37  *
  38  * This driver takes packets off the IP i/f and hands them up to a
  39  * user process to have it's wicked way with. This driver has it's
  40  * roots in a similar driver written by Phil Cockcroft (formerly) at
  41  * UCL. This driver is based much more on read/write/select mode of
  42  * operation though.
  43  *
  44  */
  45
  46 #ifndef _NET_IF_TUN_H_
  47 #define _NET_IF_TUN_H_
  48 #include <sys/appleapiopts.h>
  49
  50 #ifdef KERNEL_PRIVATE
  51 struct tun_softc {
  52         u_short tun_flags;              /* misc flags */
  53 #define TUN_OPEN        0x0001
  54 #define TUN_INITED      0x0002
  55 #define TUN_RCOLL       0x0004
  56 #define TUN_IASET       0x0008
  57 #define TUN_DSTADDR     0x0010
  58 #define TUN_RWAIT       0x0040
  59 #define TUN_ASYNC       0x0080
  60 #define TUN_NBIO        0x0100
  61
  62 #define TUN_READY       (TUN_OPEN | TUN_INITED | TUN_IASET)
  63
  64         struct  ifnet tun_if;           /* the interface */
  65         int     tun_pgrp;               /* the process group - if any */
  66         struct  selinfo tun_rsel;       /* read select */
  67         struct  selinfo tun_wsel;       /* write select (not used) */
  68 #if NBPFILTER > 0
  69         caddr_t         tun_bpf;
  70 #endif
  71 };
  72
  73 #endif KERNEL_PRIVATE
  74
  75 /* ioctl's for get/set debug */
  76 #define TUNSDEBUG       _IOW('t', 90, int)
  77 #define TUNGDEBUG       _IOR('t', 89, int)
  78
  79 /* Maximum packet size */
  80 #define TUNMTU          1500
  81
  82 #endif /* !_NET_IF_TUN_H_ */