if_tun.h revision 8876 
1/*	$NetBSD: if_tun.h,v 1.5 1994/06/29 06:36:27 cgd Exp $	*/
2
3/*
4 * Copyright (c) 1988, Julian Onions <jpo@cs.nott.ac.uk>
5 * Nottingham University 1987.
6 *
7 * This source may be freely distributed, however I would be interested
8 * in any changes that are made.
9 *
10 * This driver takes packets off the IP i/f and hands them up to a
11 * user process to have it's wicked way with. This driver has it's
12 * roots in a similar driver written by Phil Cockcroft (formerly) at
13 * UCL. This driver is based much more on read/write/select mode of
14 * operation though.
15 *
16 * : $Header: if_tnreg.h,v 1.1.2.1 1992/07/16 22:39:16 friedl Exp
17 */
18
19#ifndef _NET_IF_TUN_H_
20#define _NET_IF_TUN_H_
21
22struct tun_softc {
23	u_short	tun_flags;		/* misc flags */
24#define	TUN_OPEN	0x0001
25#define	TUN_INITED	0x0002
26#define	TUN_RCOLL	0x0004
27#define	TUN_IASET	0x0008
28#define	TUN_DSTADDR	0x0010
29#define	TUN_RWAIT	0x0040
30#define	TUN_ASYNC	0x0080
31#define	TUN_NBIO	0x0100
32
33#define	TUN_READY	(TUN_OPEN | TUN_INITED | TUN_IASET)
34
35	struct	ifnet tun_if;		/* the interface */
36	int	tun_pgrp;		/* the process group - if any */
37	struct	selinfo	tun_rsel;	/* read select */
38	struct	selinfo	tun_wsel;	/* write select (not used) */
39#if NBPFILTER > 0
40	caddr_t		tun_bpf;
41#endif
42};
43
44/* Maximum packet size */
45#define	TUNMTU		1500
46
47struct tuninfo {
48	int	baudrate;		/* linespeed */
49	short	mtu;			/* maximum transmission unit */
50	u_char	type;			/* ethernet, tokenring, etc. */
51	u_char	dummy;			/* place holder */
52};
53
54/* ioctl's for get/set debug */
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
60#endif /* !_NET_IF_TUN_H_ */
61