1 /* $NetBSD: if_tun.h,v 1.10 2001/10/31 20:08:17 atatat 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 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 * from: 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 #ifdef _KERNEL 23 struct tun_softc { 24 struct ifnet tun_if; /* the interface */ 25 26 u_short tun_flags; /* misc flags */ 27 #define TUN_OPEN 0x0001 28 #define TUN_INITED 0x0002 29 #define TUN_RCOLL 0x0004 30 #define TUN_IASET 0x0008 31 #define TUN_DSTADDR 0x0010 32 #define TUN_RWAIT 0x0040 33 #define TUN_ASYNC 0x0080 34 #define TUN_NBIO 0x0100 35 #define TUN_PREPADDR 0x0200 36 37 #define TUN_READY (TUN_OPEN | TUN_INITED | TUN_IASET) 38 39 int tun_pgrp; /* the process group - if any */ 40 struct selinfo tun_rsel; /* read select */ 41 struct selinfo tun_wsel; /* write select (not used) */ 42 int tun_unit; /* the tunnel unit number */ 43 struct simplelock tun_lock; /* lock for this tunnel */ 44 LIST_ENTRY(tun_softc) tun_list; /* list of all tuns */ 45 }; 46 #endif /* _KERNEL */ 47 48 /* Maximum packet size */ 49 #define TUNMTU 1500 50 51 /* ioctl's for get/set debug */ 52 #define TUNSDEBUG _IOW('t', 90, int) 53 #define TUNGDEBUG _IOR('t', 89, int) 54 #define TUNSIFMODE _IOW('t', 88, int) 55 #define TUNSLMODE _IOW('t', 87, int) 56 57 #endif /* !_NET_IF_TUN_H_ */ 58