Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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 _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
25
26/* TUN device flags */
27#define TUN_TUN_DEV 0x0001
28#define TUN_TAP_DEV 0x0002
29#define TUN_TYPE_MASK 0x000f
30
31#define TUN_FASYNC 0x0010
32#define TUN_NOCHECKSUM 0x0020
33#define TUN_NO_PI 0x0040
34/* This flag has no real effect */
35#define TUN_ONE_QUEUE 0x0080
36#define TUN_PERSIST 0x0100
37#define TUN_VNET_HDR 0x0200
38#define TUN_TAP_MQ 0x0400
39
40/* Ioctl defines */
41#define TUNSETNOCSUM _IOW('T', 200, int)
42#define TUNSETDEBUG _IOW('T', 201, int)
43#define TUNSETIFF _IOW('T', 202, int)
44#define TUNSETPERSIST _IOW('T', 203, int)
45#define TUNSETOWNER _IOW('T', 204, int)
46#define TUNSETLINK _IOW('T', 205, int)
47#define TUNSETGROUP _IOW('T', 206, int)
48#define TUNGETFEATURES _IOR('T', 207, unsigned int)
49#define TUNSETOFFLOAD _IOW('T', 208, unsigned int)
50#define TUNSETTXFILTER _IOW('T', 209, unsigned int)
51#define TUNGETIFF _IOR('T', 210, unsigned int)
52#define TUNGETSNDBUF _IOR('T', 211, int)
53#define TUNSETSNDBUF _IOW('T', 212, int)
54#define TUNATTACHFILTER _IOW('T', 213, struct sock_fprog)
55#define TUNDETACHFILTER _IOW('T', 214, struct sock_fprog)
56#define TUNGETVNETHDRSZ _IOR('T', 215, int)
57#define TUNSETVNETHDRSZ _IOW('T', 216, int)
58#define TUNSETQUEUE _IOW('T', 217, int)
59
60/* TUNSETIFF ifr flags */
61#define IFF_TUN 0x0001
62#define IFF_TAP 0x0002
63#define IFF_NO_PI 0x1000
64/* This flag has no real effect */
65#define IFF_ONE_QUEUE 0x2000
66#define IFF_VNET_HDR 0x4000
67#define IFF_TUN_EXCL 0x8000
68#define IFF_MULTI_QUEUE 0x0100
69#define IFF_ATTACH_QUEUE 0x0200
70#define IFF_DETACH_QUEUE 0x0400
71
72/* Features for GSO (TUNSETOFFLOAD). */
73#define TUN_F_CSUM 0x01 /* You can hand me unchecksummed packets. */
74#define TUN_F_TSO4 0x02 /* I can handle TSO for IPv4 packets */
75#define TUN_F_TSO6 0x04 /* I can handle TSO for IPv6 packets */
76#define TUN_F_TSO_ECN 0x08 /* I can handle TSO with ECN bits. */
77#define TUN_F_UFO 0x10 /* I can handle UFO packets */
78
79/* Protocol info prepended to the packets (when IFF_NO_PI is not set) */
80#define TUN_PKT_STRIP 0x0001
81struct tun_pi {
82 __u16 flags;
83 __be16 proto;
84};
85
86/*
87 * Filter spec (used for SETXXFILTER ioctls)
88 * This stuff is applicable only to the TAP (Ethernet) devices.
89 * If the count is zero the filter is disabled and the driver accepts
90 * all packets (promisc mode).
91 * If the filter is enabled in order to accept broadcast packets
92 * broadcast addr must be explicitly included in the addr list.
93 */
94#define TUN_FLT_ALLMULTI 0x0001 /* Accept all multicast packets */
95struct tun_filter {
96 __u16 flags; /* TUN_FLT_ flags see above */
97 __u16 count; /* Number of addresses */
98 __u8 addr[0][ETH_ALEN];
99};
100
101#endif /* _UAPI__IF_TUN_H */