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/*      $NetBSD: if_tun.h,v 1.5 1994/06/29 06:36:27 cgd Exp $   */

/*

 * Copyright (c) 1988, Julian Onions <jpo@cs.nott.ac.uk>

 * Nottingham University 1987.

 *

 * This source may be freely distributed, however I would be interested

 * in any changes that are made.

 *

 * This driver takes packets off the IP i/f and hands them up to a

 * user process to have its wicked way with. This driver has it's

 * roots in a similar driver written by Phil Cockcroft (formerly) at

 * UCL. This driver is based much more on read/write/select mode of

 * operation though.

 *

 * $FreeBSD: src/sys/net/if_tun.h,v 1.17 2000/01/23 01:47:12 brian Exp $

 */

#ifndef _NET_IF_TUN_H_

#define _NET_IF_TUN_H_

/* Refer to if_tunvar.h for the softc stuff */

/* Maximum transmit packet size (default) */

#define TUNMTU          1500

/* Maximum receive packet size (hard limit) */

#define TUNMRU          16384

struct tuninfo {

        int     baudrate;               /* linespeed */

        short   mtu;                    /* maximum transmission unit */

        u_char  type;                   /* ethernet, tokenring, etc. */

        u_char  dummy;                  /* place holder */

};

/* ioctl's for get/set debug */

#define TUNSDEBUG       _IOW('t', 90, int)

#define TUNGDEBUG       _IOR('t', 89, int)

#define TUNSIFINFO      _IOW('t', 91, struct tuninfo)

#define TUNGIFINFO      _IOR('t', 92, struct tuninfo)

#define TUNSLMODE       _IOW('t', 93, int)

#define TUNSIFMODE      _IOW('t', 94, int)

#define TUNSIFPID       _IO('t', 95)

#define TUNSIFHEAD      _IOW('t', 96, int)

#define TUNGIFHEAD      _IOR('t', 97, int)

#endif /* !_NET_IF_TUN_H_ */