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1/*
2 * Universal TUN/TAP device driver.
3 * Copyright (C) 1999-2000 Maxim Krasnyansky <max_mk@yahoo.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 */
15
16#ifndef __IF_TUN_H
17#define __IF_TUN_H
18
19#include <linux/types.h>
20#include <linux/if_ether.h>
21
22/* Read queue size */
23#define TUN_READQ_SIZE 500
24
25/* TUN device flags */
26#define TUN_TUN_DEV 0x0001
27#define TUN_TAP_DEV 0x0002
28#define TUN_TYPE_MASK 0x000f
29
30#define TUN_FASYNC 0x0010
31#define TUN_NOCHECKSUM 0x0020
32#define TUN_NO_PI 0x0040
33#define TUN_ONE_QUEUE 0x0080
34#define TUN_PERSIST 0x0100
35#define TUN_VNET_HDR 0x0200
36
37/* Ioctl defines */
38#define TUNSETNOCSUM _IOW('T', 200, int)
39#define TUNSETDEBUG _IOW('T', 201, int)
40#define TUNSETIFF _IOW('T', 202, int)
41#define TUNSETPERSIST _IOW('T', 203, int)
42#define TUNSETOWNER _IOW('T', 204, int)
43#define TUNSETLINK _IOW('T', 205, int)
44#define TUNSETGROUP _IOW('T', 206, int)
45#define TUNGETFEATURES _IOR('T', 207, unsigned int)
46#define TUNSETOFFLOAD _IOW('T', 208, unsigned int)
47#define TUNSETTXFILTER _IOW('T', 209, unsigned int)
48#define TUNGETIFF _IOR('T', 210, unsigned int)
49#define TUNGETSNDBUF _IOR('T', 211, int)
50#define TUNSETSNDBUF _IOW('T', 212, int)
51
52/* TUNSETIFF ifr flags */
53#define IFF_TUN 0x0001
54#define IFF_TAP 0x0002
55#define IFF_NO_PI 0x1000
56#define IFF_ONE_QUEUE 0x2000
57#define IFF_VNET_HDR 0x4000
58#define IFF_TUN_EXCL 0x8000
59
60/* Features for GSO (TUNSETOFFLOAD). */
61#define TUN_F_CSUM 0x01 /* You can hand me unchecksummed packets. */
62#define TUN_F_TSO4 0x02 /* I can handle TSO for IPv4 packets */
63#define TUN_F_TSO6 0x04 /* I can handle TSO for IPv6 packets */
64#define TUN_F_TSO_ECN 0x08 /* I can handle TSO with ECN bits. */
65#define TUN_F_UFO 0x10 /* I can handle UFO packets */
66
67/* Protocol info prepended to the packets (when IFF_NO_PI is not set) */
68#define TUN_PKT_STRIP 0x0001
69struct tun_pi {
70 __u16 flags;
71 __be16 proto;
72};
73
74/*
75 * Filter spec (used for SETXXFILTER ioctls)
76 * This stuff is applicable only to the TAP (Ethernet) devices.
77 * If the count is zero the filter is disabled and the driver accepts
78 * all packets (promisc mode).
79 * If the filter is enabled in order to accept broadcast packets
80 * broadcast addr must be explicitly included in the addr list.
81 */
82#define TUN_FLT_ALLMULTI 0x0001 /* Accept all multicast packets */
83struct tun_filter {
84 __u16 flags; /* TUN_FLT_ flags see above */
85 __u16 count; /* Number of addresses */
86 __u8 addr[0][ETH_ALEN];
87};
88
89#endif /* __IF_TUN_H */