1/* $NetBSD: if_tun.h,v 1.19 2015/09/06 06:01:01 dholland 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 its wicked way with. This driver has its
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#include <sys/ioccom.h>
23
24#ifdef _KERNEL
25struct tun_softc {
26 struct ifnet tun_if; /* the interface */
27
28 u_short tun_flags; /* misc flags */
29#define TUN_OPEN 0x0001
30#define TUN_INITED 0x0002
31#define TUN_RCOLL 0x0004
32#define TUN_IASET 0x0008
33#define TUN_DSTADDR 0x0010
34#define TUN_RWAIT 0x0040
35#define TUN_ASYNC 0x0080
36#define TUN_NBIO 0x0100
37#define TUN_PREPADDR 0x0200
38#define TUN_IFHEAD 0x0400
39
40#define TUN_READY (TUN_OPEN | TUN_INITED | TUN_IASET)
41
42 pid_t tun_pgid; /* PID or process group ID */
43 struct selinfo tun_rsel; /* read select */
44 struct selinfo tun_wsel; /* write select (not used) */
45 int tun_unit; /* the tunnel unit number */
46 kmutex_t tun_lock; /* lock for this tunnel */
47 LIST_ENTRY(tun_softc) tun_list; /* list of all tuns */
48 void *tun_osih; /* soft interrupt handle */
49 void *tun_isih; /* soft interrupt handle */
50};
51#endif /* _KERNEL */
52
53/* Maximum packet size */
54#define TUNMTU 1500
55
56/* ioctl's for get/set debug */
57#define TUNSDEBUG _IOW('t', 90, int)
58#define TUNGDEBUG _IOR('t', 89, int)
59#define TUNSIFMODE _IOW('t', 88, int)
60#define TUNSLMODE _IOW('t', 87, int)
61#define TUNSIFHEAD _IOW('t', 66, int)
62#define TUNGIFHEAD _IOR('t', 65, int)
63
64#endif /* !_NET_IF_TUN_H_ */
65