bsd/netinet/if_tun.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_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. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /* Copyright (c) 1997 Apple Computer, Inc. All Rights Reserved */
  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 it's 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
  43 #ifdef KERNEL_PRIVATE
  44 struct tun_softc {
  45         u_short tun_flags;              /* misc flags */
  46 #define TUN_OPEN        0x0001
  47 #define TUN_INITED      0x0002
  48 #define TUN_RCOLL       0x0004
  49 #define TUN_IASET       0x0008
  50 #define TUN_DSTADDR     0x0010
  51 #define TUN_RWAIT       0x0040
  52 #define TUN_ASYNC       0x0080
  53 #define TUN_NBIO        0x0100
  54
  55 #define TUN_READY       (TUN_OPEN | TUN_INITED | TUN_IASET)
  56
  57         struct  ifnet tun_if;           /* the interface */
  58         int     tun_pgrp;               /* the process group - if any */
  59         struct  selinfo tun_rsel;       /* read select */
  60         struct  selinfo tun_wsel;       /* write select (not used) */
  61 #if NBPFILTER > 0
  62         caddr_t         tun_bpf;
  63 #endif
  64 };
  65
  66 #endif KERNEL_PRIVATE
  67
  68 /* ioctl's for get/set debug */
  69 #define TUNSDEBUG       _IOW('t', 90, int)
  70 #define TUNGDEBUG       _IOR('t', 89, int)
  71
  72 /* Maximum packet size */
  73 #define TUNMTU          1500
  74
  75 #endif /* !_NET_IF_TUN_H_ */