/* $NetBSD: if_tun.h,v 1.22 2022/03/13 21:32:43 riastradh Exp $ */
/*
* Copyright (c) 1988, Julian Onions <
[email protected]>
* 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 its
* 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>
#ifdef _KERNEL
#include <sys/types.h>
#include <sys/condvar.h>
#include <sys/mutex.h>
#include <sys/queue.h>
#include <sys/select.h>
#include <net/if.h>
struct tun_softc {
struct ifnet tun_if; /* the interface */
u_short tun_flags; /* misc flags */
#define TUN_OPEN 0x0001
#define TUN_INITED 0x0002
#define TUN_RCOLL 0x0004
#define TUN_IASET 0x0008
#define TUN_DSTADDR 0x0010
#define TUN_UNUSED0 0x0040 /* was TUN_RWAIT */
#define TUN_ASYNC 0x0080
#define TUN_NBIO 0x0100
#define TUN_PREPADDR 0x0200
#define TUN_IFHEAD 0x0400
#define TUN_READY (TUN_OPEN | TUN_INITED | TUN_IASET)
pid_t tun_pgid; /* PID or process group ID */
struct selinfo tun_rsel; /* read select */
struct selinfo tun_wsel; /* write select (not used) */
int tun_unit; /* the tunnel unit number */
kmutex_t tun_lock; /* lock for this tunnel */
kcondvar_t tun_cv; /* condition variable for tunnel */
LIST_ENTRY(tun_softc) tun_list; /* list of all tuns */
void *tun_osih; /* soft interrupt handle */
void *tun_isih; /* soft interrupt handle */
};
#endif /* _KERNEL */
/* Maximum packet size */
#define TUNMTU 1500
/* ioctl's for get/set debug */
#define TUNSDEBUG _IOW('t', 90, int)
#define TUNGDEBUG _IOR('t', 89, int)
#define TUNSIFMODE _IOW('t', 88, int)
#define TUNSLMODE _IOW('t', 87, int)
#define TUNSIFHEAD _IOW('t', 66, int)
#define TUNGIFHEAD _IOR('t', 65, int)
#endif /* !_NET_IF_TUN_H_ */
