1/* $NetBSD: if_tun.h,v 1.22 2022/03/13 21:32:43 riastradh 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
25
26#include <sys/types.h>
27
28#include <sys/condvar.h>
29#include <sys/mutex.h>
30#include <sys/queue.h>
31#include <sys/select.h>
32
33#include <net/if.h>
34
35struct tun_softc {
36 struct ifnet tun_if; /* the interface */
37
38 u_short tun_flags; /* misc flags */
39#define TUN_OPEN 0x0001
40#define TUN_INITED 0x0002
41#define TUN_RCOLL 0x0004
42#define TUN_IASET 0x0008
43#define TUN_DSTADDR 0x0010
44#define TUN_UNUSED0 0x0040 /* was TUN_RWAIT */
45#define TUN_ASYNC 0x0080
46#define TUN_NBIO 0x0100
47#define TUN_PREPADDR 0x0200
48#define TUN_IFHEAD 0x0400
49
50#define TUN_READY (TUN_OPEN | TUN_INITED | TUN_IASET)
51
52 pid_t tun_pgid; /* PID or process group ID */
53 struct selinfo tun_rsel; /* read select */
54 struct selinfo tun_wsel; /* write select (not used) */
55 int tun_unit; /* the tunnel unit number */
56 kmutex_t tun_lock; /* lock for this tunnel */
57 kcondvar_t tun_cv; /* condition variable for tunnel */
58 LIST_ENTRY(tun_softc) tun_list; /* list of all tuns */
59 void *tun_osih; /* soft interrupt handle */
60 void *tun_isih; /* soft interrupt handle */
61};
62#endif /* _KERNEL */
63
64/* Maximum packet size */
65#define TUNMTU 1500
66
67/* ioctl's for get/set debug */
68#define TUNSDEBUG _IOW('t', 90, int)
69#define TUNGDEBUG _IOR('t', 89, int)
70#define TUNSIFMODE _IOW('t', 88, int)
71#define TUNSLMODE _IOW('t', 87, int)
72#define TUNSIFHEAD _IOW('t', 66, int)
73#define TUNGIFHEAD _IOR('t', 65, int)
74
75#endif /* !_NET_IF_TUN_H_ */