1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
2 /*
3 * Universal TUN/TAP device driver.
4 * Copyright (C) 1999-2000 Maxim Krasnyansky <max_mk@yahoo.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 */
16
17 #ifndef _UAPI__IF_TUN_H
18 #define _UAPI__IF_TUN_H
19
20 #include <linux/types.h>
21 #include <linux/if_ether.h>
22 #include <linux/filter.h>
23
24 /* Read queue size */
25 #define TUN_READQ_SIZE 500
26 /* TUN device type flags: deprecated. Use IFF_TUN/IFF_TAP instead. */
27 #define TUN_TUN_DEV IFF_TUN
28 #define TUN_TAP_DEV IFF_TAP
29 #define TUN_TYPE_MASK 0x000f
30
31 /* Ioctl defines */
32 #define TUNSETNOCSUM _IOW('T', 200, int)
33 #define TUNSETDEBUG _IOW('T', 201, int)
34 #define TUNSETIFF _IOW('T', 202, int)
35 #define TUNSETPERSIST _IOW('T', 203, int)
36 #define TUNSETOWNER _IOW('T', 204, int)
37 #define TUNSETLINK _IOW('T', 205, int)
38 #define TUNSETGROUP _IOW('T', 206, int)
39 #define TUNGETFEATURES _IOR('T', 207, unsigned int)
40 #define TUNSETOFFLOAD _IOW('T', 208, unsigned int)
41 #define TUNSETTXFILTER _IOW('T', 209, unsigned int)
42 #define TUNGETIFF _IOR('T', 210, unsigned int)
43 #define TUNGETSNDBUF _IOR('T', 211, int)
44 #define TUNSETSNDBUF _IOW('T', 212, int)
45 #define TUNATTACHFILTER _IOW('T', 213, struct sock_fprog)
46 #define TUNDETACHFILTER _IOW('T', 214, struct sock_fprog)
47 #define TUNGETVNETHDRSZ _IOR('T', 215, int)
48 #define TUNSETVNETHDRSZ _IOW('T', 216, int)
49 #define TUNSETQUEUE _IOW('T', 217, int)
50 #define TUNSETIFINDEX _IOW('T', 218, unsigned int)
51 #define TUNGETFILTER _IOR('T', 219, struct sock_fprog)
52 #define TUNSETVNETLE _IOW('T', 220, int)
53 #define TUNGETVNETLE _IOR('T', 221, int)
54 /* The TUNSETVNETBE and TUNGETVNETBE ioctls are for cross-endian support on
55 * little-endian hosts. Not all kernel configurations support them, but all
56 * configurations that support SET also support GET.
57 */
58 #define TUNSETVNETBE _IOW('T', 222, int)
59 #define TUNGETVNETBE _IOR('T', 223, int)
60 #define TUNSETSTEERINGEBPF _IOR('T', 224, int)
61 #define TUNSETFILTEREBPF _IOR('T', 225, int)
62 #define TUNSETCARRIER _IOW('T', 226, int)
63 #define TUNGETDEVNETNS _IO('T', 227)
64
65 /* TUNSETIFF ifr flags */
66 #define IFF_TUN 0x0001
67 #define IFF_TAP 0x0002
68 #define IFF_NAPI 0x0010
69 #define IFF_NAPI_FRAGS 0x0020
70 /* Used in TUNSETIFF to bring up tun/tap without carrier */
71 #define IFF_NO_CARRIER 0x0040
72 #define IFF_NO_PI 0x1000
73 /* This flag has no real effect */
74 #define IFF_ONE_QUEUE 0x2000
75 #define IFF_VNET_HDR 0x4000
76 #define IFF_TUN_EXCL 0x8000
77 #define IFF_MULTI_QUEUE 0x0100
78 #define IFF_ATTACH_QUEUE 0x0200
79 #define IFF_DETACH_QUEUE 0x0400
80 /* read-only flag */
81 #define IFF_PERSIST 0x0800
82 #define IFF_NOFILTER 0x1000
83
84 /* Socket options */
85 #define TUN_TX_TIMESTAMP 1
86
87 /* Features for GSO (TUNSETOFFLOAD). */
88 #define TUN_F_CSUM 0x01 /* You can hand me unchecksummed packets. */
89 #define TUN_F_TSO4 0x02 /* I can handle TSO for IPv4 packets */
90 #define TUN_F_TSO6 0x04 /* I can handle TSO for IPv6 packets */
91 #define TUN_F_TSO_ECN 0x08 /* I can handle TSO with ECN bits. */
92 #define TUN_F_UFO 0x10 /* I can handle UFO packets */
93 #define TUN_F_USO4 0x20 /* I can handle USO for IPv4 packets */
94 #define TUN_F_USO6 0x40 /* I can handle USO for IPv6 packets */
95
96 /* Protocol info prepended to the packets (when IFF_NO_PI is not set) */
97 #define TUN_PKT_STRIP 0x0001
98 struct tun_pi {
99 __u16 flags;
100 __be16 proto;
101 };
102
103 /*
104 * Filter spec (used for SETXXFILTER ioctls)
105 * This stuff is applicable only to the TAP (Ethernet) devices.
106 * If the count is zero the filter is disabled and the driver accepts
107 * all packets (promisc mode).
108 * If the filter is enabled in order to accept broadcast packets
109 * broadcast addr must be explicitly included in the addr list.
110 */
111 #define TUN_FLT_ALLMULTI 0x0001 /* Accept all multicast packets */
112 struct tun_filter {
113 __u16 flags; /* TUN_FLT_ flags see above */
114 __u16 count; /* Number of addresses */
115 __u8 addr[][ETH_ALEN];
116 };
117
118 #endif /* _UAPI__IF_TUN_H */
119
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