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if_tun.h revision 1.3 
      1 /*
      2  * Copyright (c) 1988, Julian Onions <jpo (at) cs.nott.ac.uk>
      3  * Nottingham University 1987.
      4  *
      5  * This source may be freely distributed, however I would be interested
      6  * in any changes that are made.
      7  *
      8  * This driver takes packets off the IP i/f and hands them up to a
      9  * user process to have it's wicked way with. This driver has it's
     10  * roots in a similar driver written by Phil Cockcroft (formerly) at
     11  * UCL. This driver is based much more on read/write/select mode of
     12  * operation though.
     13  *
     14  * from: $Header: if_tnreg.h,v 1.1.2.1 1992/07/16 22:39:16 friedl Exp
     15  * $Id: if_tun.h,v 1.3 1993/12/13 14:27:01 deraadt Exp $
     16  */
     17 
     18 #ifndef _NET_IF_TUN_H_
     19 #define _NET_IF_TUN_H_
     20 
     21 struct tun_softc {
     22 	u_short	tun_flags;		/* misc flags */
     23 #define	TUN_OPEN	0x0001
     24 #define	TUN_INITED	0x0002
     25 #define	TUN_RCOLL	0x0004
     26 #define	TUN_IASET	0x0008
     27 #define	TUN_DSTADDR	0x0010
     28 #define	TUN_READY	0x0020
     29 #define	TUN_RWAIT	0x0040
     30 #define	TUN_ASYNC	0x0080
     31 #define	TUN_NBIO	0x0100
     32 	struct	ifnet tun_if;		/* the interface */
     33 	int	tun_pgrp;		/* the process group - if any */
     34 	struct	selinfo	tun_rsel;	/* read select */
     35 	struct	selinfo	tun_wsel;	/* write select (not used) */
     36 #if NBPFILTER > 0
     37 	caddr_t		tun_bpf;
     38 #endif
     39 };
     40 
     41 /* Maximum packet size */
     42 #define	TUNMTU		1500
     43 
     44 /* ioctl's for get/set debug */
     45 #define	TUNSDEBUG	_IOW('t', 90, int)
     46 #define	TUNGDEBUG	_IOR('t', 89, int)
     47 
     48 #endif /* !_NET_IF_TUN_H_ */
     49