bsd/netinet/if_tun.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_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 License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /* Copyright (c) 1997 Apple Computer, Inc. All Rights Reserved */
  29 /*
  30  * Copyright (c) 1988, Julian Onions <jpo@cs.nott.ac.uk>
  31  * Nottingham University 1987.
  32  *
  33  * This source may be freely distributed, however I would be interested
  34  * in any changes that are made.
  35  *
  36  * This driver takes packets off the IP i/f and hands them up to a
  37  * user process to have it's wicked way with. This driver has it's
  38  * roots in a similar driver written by Phil Cockcroft (formerly) at
  39  * UCL. This driver is based much more on read/write/select mode of
  40  * operation though.
  41  *
  42  */
  43
  44 #ifndef _NET_IF_TUN_H_
  45 #define _NET_IF_TUN_H_
  46 #include <sys/appleapiopts.h>
  47
  48 #ifdef KERNEL_PRIVATE
  49 struct tun_softc {
  50         u_short tun_flags;              /* misc flags */
  51 #define TUN_OPEN        0x0001
  52 #define TUN_INITED      0x0002
  53 #define TUN_RCOLL       0x0004
  54 #define TUN_IASET       0x0008
  55 #define TUN_DSTADDR     0x0010
  56 #define TUN_RWAIT       0x0040
  57 #define TUN_ASYNC       0x0080
  58 #define TUN_NBIO        0x0100
  59
  60 #define TUN_READY       (TUN_OPEN | TUN_INITED | TUN_IASET)
  61
  62         struct  ifnet tun_if;           /* the interface */
  63         int     tun_pgrp;               /* the process group - if any */
  64         struct  selinfo tun_rsel;       /* read select */
  65         struct  selinfo tun_wsel;       /* write select (not used) */
  66 #if NBPFILTER > 0
  67         caddr_t         tun_bpf;
  68 #endif
  69 };
  70
  71 #endif /* KERNEL_PRIVATE */
  72
  73 /* ioctl's for get/set debug */
  74 #define TUNSDEBUG       _IOW('t', 90, int)
  75 #define TUNGDEBUG       _IOR('t', 89, int)
  76
  77 /* Maximum packet size */
  78 #define TUNMTU          1500
  79
  80 #endif /* !_NET_IF_TUN_H_ */