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if_tun.h revision 1.6 
      1 /*	$NetBSD: if_tun.h,v 1.6 1996/06/25 22:15:18 pk Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1988, Julian Onions <jpo (at) 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 
     22 struct 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 #define	TUN_PREPADDR	0x0200
     33 
     34 #define	TUN_READY	(TUN_OPEN | TUN_INITED | TUN_IASET)
     35 
     36 	struct	ifnet tun_if;		/* the interface */
     37 	int	tun_pgrp;		/* the process group - if any */
     38 	struct	selinfo	tun_rsel;	/* read select */
     39 	struct	selinfo	tun_wsel;	/* write select (not used) */
     40 #if NBPFILTER > 0
     41 	caddr_t		tun_bpf;
     42 #endif
     43 };
     44 
     45 /* Maximum packet size */
     46 #define	TUNMTU		1500
     47 
     48 /* ioctl's for get/set debug */
     49 #define	TUNSDEBUG	_IOW('t', 90, int)
     50 #define	TUNGDEBUG	_IOR('t', 89, int)
     51 #define	TUNSIFMODE	_IOW('t', 88, int)
     52 #define	TUNSLMODE	_IOW('t', 87, int)
     53 
     54 #endif /* !_NET_IF_TUN_H_ */
     55