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David Howells607ca462012-10-13 10:46:48 +01001/*
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 _UAPI__IF_TUN_H
17#define _UAPI__IF_TUN_H
18
19#include <linux/types.h>
20#include <linux/if_ether.h>
21#include <linux/filter.h>
22
23/* Read queue size */
24#define TUN_READQ_SIZE 500
Michael S. Tsirkin031f5e02014-11-19 14:44:40 +020025/* TUN device type flags: deprecated. Use IFF_TUN/IFF_TAP instead. */
26#define TUN_TUN_DEV IFF_TUN
27#define TUN_TAP_DEV IFF_TAP
David Howells607ca462012-10-13 10:46:48 +010028#define TUN_TYPE_MASK 0x000f
29
David Howells607ca462012-10-13 10:46:48 +010030/* Ioctl defines */
31#define TUNSETNOCSUM _IOW('T', 200, int)
32#define TUNSETDEBUG _IOW('T', 201, int)
33#define TUNSETIFF _IOW('T', 202, int)
34#define TUNSETPERSIST _IOW('T', 203, int)
35#define TUNSETOWNER _IOW('T', 204, int)
36#define TUNSETLINK _IOW('T', 205, int)
37#define TUNSETGROUP _IOW('T', 206, int)
38#define TUNGETFEATURES _IOR('T', 207, unsigned int)
39#define TUNSETOFFLOAD _IOW('T', 208, unsigned int)
40#define TUNSETTXFILTER _IOW('T', 209, unsigned int)
41#define TUNGETIFF _IOR('T', 210, unsigned int)
42#define TUNGETSNDBUF _IOR('T', 211, int)
43#define TUNSETSNDBUF _IOW('T', 212, int)
44#define TUNATTACHFILTER _IOW('T', 213, struct sock_fprog)
45#define TUNDETACHFILTER _IOW('T', 214, struct sock_fprog)
46#define TUNGETVNETHDRSZ _IOR('T', 215, int)
47#define TUNSETVNETHDRSZ _IOW('T', 216, int)
Jason Wangcde8b152012-10-31 19:46:01 +000048#define TUNSETQUEUE _IOW('T', 217, int)
Pavel Emelyanovfb7589a2013-08-21 14:31:38 +040049#define TUNSETIFINDEX _IOW('T', 218, unsigned int)
Pavel Emelyanov76975e92013-08-21 14:32:39 +040050#define TUNGETFILTER _IOR('T', 219, struct sock_fprog)
Michael S. Tsirkin5eea84f2014-12-16 15:05:01 +020051#define TUNSETVNETLE _IOW('T', 220, int)
52#define TUNGETVNETLE _IOR('T', 221, int)
Greg Kurz8b8e6582015-04-24 14:50:36 +020053/* The TUNSETVNETBE and TUNGETVNETBE ioctls are for cross-endian support on
54 * little-endian hosts. Not all kernel configurations support them, but all
55 * configurations that support SET also support GET.
56 */
57#define TUNSETVNETBE _IOW('T', 222, int)
58#define TUNGETVNETBE _IOR('T', 223, int)
David Howells607ca462012-10-13 10:46:48 +010059
60/* TUNSETIFF ifr flags */
61#define IFF_TUN 0x0001
62#define IFF_TAP 0x0002
63#define IFF_NO_PI 0x1000
Michael S. Tsirkin5d097102012-12-03 10:07:14 +000064/* This flag has no real effect */
David Howells607ca462012-10-13 10:46:48 +010065#define IFF_ONE_QUEUE 0x2000
66#define IFF_VNET_HDR 0x4000
67#define IFF_TUN_EXCL 0x8000
Jason Wangbbb00992012-10-31 19:45:59 +000068#define IFF_MULTI_QUEUE 0x0100
Jason Wangcde8b152012-10-31 19:46:01 +000069#define IFF_ATTACH_QUEUE 0x0200
70#define IFF_DETACH_QUEUE 0x0400
Pavel Emelyanov274038f2013-06-11 14:41:24 +040071/* read-only flag */
72#define IFF_PERSIST 0x0800
Pavel Emelyanov849c9b62013-08-21 14:32:21 +040073#define IFF_NOFILTER 0x1000
David Howells607ca462012-10-13 10:46:48 +010074
Richard Cochraneda29772013-07-19 19:40:10 +020075/* Socket options */
76#define TUN_TX_TIMESTAMP 1
77
David Howells607ca462012-10-13 10:46:48 +010078/* Features for GSO (TUNSETOFFLOAD). */
79#define TUN_F_CSUM 0x01 /* You can hand me unchecksummed packets. */
80#define TUN_F_TSO4 0x02 /* I can handle TSO for IPv4 packets */
81#define TUN_F_TSO6 0x04 /* I can handle TSO for IPv6 packets */
82#define TUN_F_TSO_ECN 0x08 /* I can handle TSO with ECN bits. */
83#define TUN_F_UFO 0x10 /* I can handle UFO packets */
84
85/* Protocol info prepended to the packets (when IFF_NO_PI is not set) */
86#define TUN_PKT_STRIP 0x0001
87struct tun_pi {
88 __u16 flags;
89 __be16 proto;
90};
91
92/*
93 * Filter spec (used for SETXXFILTER ioctls)
94 * This stuff is applicable only to the TAP (Ethernet) devices.
95 * If the count is zero the filter is disabled and the driver accepts
96 * all packets (promisc mode).
97 * If the filter is enabled in order to accept broadcast packets
98 * broadcast addr must be explicitly included in the addr list.
99 */
100#define TUN_FLT_ALLMULTI 0x0001 /* Accept all multicast packets */
101struct tun_filter {
102 __u16 flags; /* TUN_FLT_ flags see above */
103 __u16 count; /* Number of addresses */
104 __u8 addr[0][ETH_ALEN];
105};
106
107#endif /* _UAPI__IF_TUN_H */