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 its 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 * $FreeBSD$
17 */
18
19#ifndef _NET_IF_TUN_H_
20#define _NET_IF_TUN_H_
21
22/* Refer to if_tunvar.h for the softc stuff */
23
24/* Maximum transmit packet size (default) */
25#define	TUNMTU		1500
26
27/* Maximum receive packet size (hard limit) */
28#define	TUNMRU		16384
29
30struct tuninfo {
31	int	baudrate;		/* linespeed */
32	short	mtu;			/* maximum transmission unit */
33	u_char	type;			/* ethernet, tokenring, etc. */
34	u_char	dummy;			/* place holder */
35};
36
37/* ioctl's for get/set debug */
38#define	TUNSDEBUG	_IOW('t', 90, int)
39#define	TUNGDEBUG	_IOR('t', 89, int)
40#define	TUNSIFINFO	_IOW('t', 91, struct tuninfo)
41#define	TUNGIFINFO	_IOR('t', 92, struct tuninfo)
42#define	TUNSLMODE	_IOW('t', 93, int)
43#define	TUNSIFMODE	_IOW('t', 94, int)
44#define	TUNSIFPID	_IO('t', 95)
45#define	TUNSIFHEAD	_IOW('t', 96, int)
46#define	TUNGIFHEAD	_IOR('t', 97, int)
47
48#endif /* !_NET_IF_TUN_H_ */
49