if_tun.h

嵌入式操作系统ECOS的网络开发包

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//      include/net/if_tun.h
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//      
//
//==========================================================================
//####BSDCOPYRIGHTBEGIN####
//
// -------------------------------------------
//
// Portions of this software may have been derived from OpenBSD or other sources,
// and are covered by the appropriate copyright disclaimers included herein.
//
// -------------------------------------------
//
//####BSDCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):    gthomas
// Contributors: gthomas
// Date:         2000-01-10
// Purpose:      
// Description:  
//              
//
//####DESCRIPTIONEND####
//
//==========================================================================


/*	$OpenBSD: if_tun.h,v 1.8 1998/08/02 07:17:44 brian Exp $	*/

/*
 * Copyright (c) 1988, Julian Onions <[e-mail]>
 * 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 it's 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.
 * 
 * from: @Header: if_tnreg.h,v 1.1.2.1 1992/07/16 22:39:16 friedl Exp
 */

#ifndef _NET_IF_TUN_H_
#define _NET_IF_TUN_H_

#include <sys/ioccom.h>

#define	TUN_OPEN	0x0001
#define	TUN_INITED	0x0002
#define	TUN_RCOLL	0x0004
#define	TUN_IASET	0x0008
#define	TUN_DSTADDR	0x0010
#define	TUN_RWAIT	0x0040
#define	TUN_ASYNC	0x0080
#define	TUN_NBIO	0x0100
#define TUN_BRDADDR	0x0200
#define TUN_STAYUP	0x0400

#define	TUN_READY	(TUN_OPEN | TUN_INITED | TUN_IASET)

/* Maximum packet size */
#define	TUNMTU		3000

/* Maximum receive packet size (hard limit) */
#define TUNMRU          16384

/* ioctl's for get/set debug */
#define	TUNSDEBUG	_IOW('t', 89, int)
#define	TUNGDEBUG	_IOR('t', 90, int)

/* iface info */
struct tuninfo {
	u_int	mtu;
	u_short	type;
	u_short	flags;
	u_int	baudrate;
};
#define TUNSIFINFO	_IOW('t', 91, struct tuninfo)
#define TUNGIFINFO	_IOR('t', 92, struct tuninfo)

#endif /* !_NET_IF_TUN_H_ */