| David Howells | 607ca46 | 2012-10-13 10:46:48 +0100 | [diff] [blame] | 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 | #define TUN_ONE_QUEUE 0x0080 |
| 35 | #define TUN_PERSIST 0x0100 |
| 36 | #define TUN_VNET_HDR 0x0200 |
| 37 | |
| 38 | /* Ioctl defines */ |
| 39 | #define TUNSETNOCSUM _IOW('T', 200, int) |
| 40 | #define TUNSETDEBUG _IOW('T', 201, int) |
| 41 | #define TUNSETIFF _IOW('T', 202, int) |
| 42 | #define TUNSETPERSIST _IOW('T', 203, int) |
| 43 | #define TUNSETOWNER _IOW('T', 204, int) |
| 44 | #define TUNSETLINK _IOW('T', 205, int) |
| 45 | #define TUNSETGROUP _IOW('T', 206, int) |
| 46 | #define TUNGETFEATURES _IOR('T', 207, unsigned int) |
| 47 | #define TUNSETOFFLOAD _IOW('T', 208, unsigned int) |
| 48 | #define TUNSETTXFILTER _IOW('T', 209, unsigned int) |
| 49 | #define TUNGETIFF _IOR('T', 210, unsigned int) |
| 50 | #define TUNGETSNDBUF _IOR('T', 211, int) |
| 51 | #define TUNSETSNDBUF _IOW('T', 212, int) |
| 52 | #define TUNATTACHFILTER _IOW('T', 213, struct sock_fprog) |
| 53 | #define TUNDETACHFILTER _IOW('T', 214, struct sock_fprog) |
| 54 | #define TUNGETVNETHDRSZ _IOR('T', 215, int) |
| 55 | #define TUNSETVNETHDRSZ _IOW('T', 216, int) |
| 56 | |
| 57 | /* TUNSETIFF ifr flags */ |
| 58 | #define IFF_TUN 0x0001 |
| 59 | #define IFF_TAP 0x0002 |
| 60 | #define IFF_NO_PI 0x1000 |
| 61 | #define IFF_ONE_QUEUE 0x2000 |
| 62 | #define IFF_VNET_HDR 0x4000 |
| 63 | #define IFF_TUN_EXCL 0x8000 |
| 64 | |
| 65 | /* Features for GSO (TUNSETOFFLOAD). */ |
| 66 | #define TUN_F_CSUM 0x01 /* You can hand me unchecksummed packets. */ |
| 67 | #define TUN_F_TSO4 0x02 /* I can handle TSO for IPv4 packets */ |
| 68 | #define TUN_F_TSO6 0x04 /* I can handle TSO for IPv6 packets */ |
| 69 | #define TUN_F_TSO_ECN 0x08 /* I can handle TSO with ECN bits. */ |
| 70 | #define TUN_F_UFO 0x10 /* I can handle UFO packets */ |
| 71 | |
| 72 | /* Protocol info prepended to the packets (when IFF_NO_PI is not set) */ |
| 73 | #define TUN_PKT_STRIP 0x0001 |
| 74 | struct tun_pi { |
| 75 | __u16 flags; |
| 76 | __be16 proto; |
| 77 | }; |
| 78 | |
| 79 | /* |
| 80 | * Filter spec (used for SETXXFILTER ioctls) |
| 81 | * This stuff is applicable only to the TAP (Ethernet) devices. |
| 82 | * If the count is zero the filter is disabled and the driver accepts |
| 83 | * all packets (promisc mode). |
| 84 | * If the filter is enabled in order to accept broadcast packets |
| 85 | * broadcast addr must be explicitly included in the addr list. |
| 86 | */ |
| 87 | #define TUN_FLT_ALLMULTI 0x0001 /* Accept all multicast packets */ |
| 88 | struct tun_filter { |
| 89 | __u16 flags; /* TUN_FLT_ flags see above */ |
| 90 | __u16 count; /* Number of addresses */ |
| 91 | __u8 addr[0][ETH_ALEN]; |
| 92 | }; |
| 93 | |
| 94 | #endif /* _UAPI__IF_TUN_H */ |