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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 | ||
0cced294 YW |
17 | #ifndef __IF_TUN_H |
18 | #define __IF_TUN_H | |
01234e1f YW |
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) | |
a3824444 | 63 | #define TUNGETDEVNETNS _IO('T', 227) |
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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 | |
a95ff98e FS |
70 | /* Used in TUNSETIFF to bring up tun/tap without carrier */ |
71 | #define IFF_NO_CARRIER 0x0040 | |
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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 */ | |
a95ff98e FS |
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 */ | |
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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 */ | |
a95ff98e | 115 | __u8 addr[][ETH_ALEN]; |
01234e1f YW |
116 | }; |
117 | ||
0cced294 | 118 | #endif /* __IF_TUN_H */ |