if_tun.h revision 6053 
1/*
2 * Copyright (c) 1988, Julian Onions <jpo@cs.nott.ac.uk>
3 * Nottingham University 1987.
4 *
5 * This source may be freely distributed, however I would be interested
6 * in any changes that are made.
7 *
8 * This driver takes packets off the IP i/f and hands them up to a
9 * user process to have it's wicked way with. This driver has it's
10 * roots in a similar driver written by Phil Cockcroft (formerly) at
11 * UCL. This driver is based much more on read/write/select mode of
12 * operation though.
13 *
14 * from: $Header: if_tnreg.h,v 1.1.2.1 1992/07/16 22:39:16 friedl Exp
15 * $Id: if_tun.h,v 1.3 1993/12/13 14:27:01 deraadt Exp $
16 */
17
18#ifndef _NET_IF_TUN_H_
19#define _NET_IF_TUN_H_
20
21struct tun_softc {
22	u_short	tun_flags;		/* misc flags */
23#define	TUN_OPEN	0x0001
24#define	TUN_INITED	0x0002
25#define	TUN_RCOLL	0x0004
26#define	TUN_IASET	0x0008
27#define	TUN_DSTADDR	0x0010
28#ifdef notdef
29#define	TUN_READY	0x0020
30#else
31#define TUN_READY       (TUN_IASET|TUN_OPEN|TUN_DSTADDR)
32#endif
33#define	TUN_RWAIT	0x0040
34#define	TUN_ASYNC	0x0080
35#define	TUN_NBIO	0x0100
36	struct	ifnet tun_if;		/* the interface */
37	int	tun_pgrp;		/* the process group - if any */
38#if BSD < 199103
39	struct  proc    *tun_rsel;
40	struct  proc	*tun_wsel;
41#else
42	u_char		tun_pad;	/* explicit alignment */
43	struct selinfo  tun_sel;	/* bsd select info */
44#endif
45#if NBPFILTER > 0
46	caddr_t		tun_bpf;
47#endif
48};
49
50/* Maximum packet size */
51#define	TUNMTU		1500
52
53/* ioctl's for get/set debug */
54#ifdef __NetBSD__
55#define	TUNSDEBUG	_IOW('t', 90, int)
56#define	TUNGDEBUG	_IOR('t', 89, int)
57#define	TUNSIFINFO	_IOW('t', 91, struct tuninfo)
58#define	TUNGIFINFO	_IOR('t', 92, struct tuninfo)
59#else	/* Assume BSDI */
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#endif
65
66struct tuninfo {
67	int	tif_baudrate;		/* linespeed */
68	short	tif_mtu;		/* maximum transmission unit */
69	u_char	tif_type;		/* ethernet, tokenring, etc. */
70	u_char	tif_dummy;		/* place holder */
71};
72#endif /* !_NET_IF_TUN_H_ */
73