1e2be04c7SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2607ca46eSDavid Howells /* 3607ca46eSDavid Howells * Universal TUN/TAP device driver. 4607ca46eSDavid Howells * Copyright (C) 1999-2000 Maxim Krasnyansky <max_mk@yahoo.com> 5607ca46eSDavid Howells * 6607ca46eSDavid Howells * This program is free software; you can redistribute it and/or modify 7607ca46eSDavid Howells * it under the terms of the GNU General Public License as published by 8607ca46eSDavid Howells * the Free Software Foundation; either version 2 of the License, or 9607ca46eSDavid Howells * (at your option) any later version. 10607ca46eSDavid Howells * 11607ca46eSDavid Howells * This program is distributed in the hope that it will be useful, 12607ca46eSDavid Howells * but WITHOUT ANY WARRANTY; without even the implied warranty of 13607ca46eSDavid Howells * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14607ca46eSDavid Howells * GNU General Public License for more details. 15607ca46eSDavid Howells */ 16607ca46eSDavid Howells 17607ca46eSDavid Howells #ifndef _UAPI__IF_TUN_H 18607ca46eSDavid Howells #define _UAPI__IF_TUN_H 19607ca46eSDavid Howells 20607ca46eSDavid Howells #include <linux/types.h> 21607ca46eSDavid Howells #include <linux/if_ether.h> 22607ca46eSDavid Howells #include <linux/filter.h> 23607ca46eSDavid Howells 24607ca46eSDavid Howells /* Read queue size */ 25607ca46eSDavid Howells #define TUN_READQ_SIZE 500 26031f5e03SMichael S. Tsirkin /* TUN device type flags: deprecated. Use IFF_TUN/IFF_TAP instead. */ 27031f5e03SMichael S. Tsirkin #define TUN_TUN_DEV IFF_TUN 28031f5e03SMichael S. Tsirkin #define TUN_TAP_DEV IFF_TAP 29607ca46eSDavid Howells #define TUN_TYPE_MASK 0x000f 30607ca46eSDavid Howells 31607ca46eSDavid Howells /* Ioctl defines */ 32607ca46eSDavid Howells #define TUNSETNOCSUM _IOW('T', 200, int) 33607ca46eSDavid Howells #define TUNSETDEBUG _IOW('T', 201, int) 34607ca46eSDavid Howells #define TUNSETIFF _IOW('T', 202, int) 35607ca46eSDavid Howells #define TUNSETPERSIST _IOW('T', 203, int) 36607ca46eSDavid Howells #define TUNSETOWNER _IOW('T', 204, int) 37607ca46eSDavid Howells #define TUNSETLINK _IOW('T', 205, int) 38607ca46eSDavid Howells #define TUNSETGROUP _IOW('T', 206, int) 39607ca46eSDavid Howells #define TUNGETFEATURES _IOR('T', 207, unsigned int) 40607ca46eSDavid Howells #define TUNSETOFFLOAD _IOW('T', 208, unsigned int) 41607ca46eSDavid Howells #define TUNSETTXFILTER _IOW('T', 209, unsigned int) 42607ca46eSDavid Howells #define TUNGETIFF _IOR('T', 210, unsigned int) 43607ca46eSDavid Howells #define TUNGETSNDBUF _IOR('T', 211, int) 44607ca46eSDavid Howells #define TUNSETSNDBUF _IOW('T', 212, int) 45607ca46eSDavid Howells #define TUNATTACHFILTER _IOW('T', 213, struct sock_fprog) 46607ca46eSDavid Howells #define TUNDETACHFILTER _IOW('T', 214, struct sock_fprog) 47607ca46eSDavid Howells #define TUNGETVNETHDRSZ _IOR('T', 215, int) 48607ca46eSDavid Howells #define TUNSETVNETHDRSZ _IOW('T', 216, int) 49cde8b15fSJason Wang #define TUNSETQUEUE _IOW('T', 217, int) 50fb7589a1SPavel Emelyanov #define TUNSETIFINDEX _IOW('T', 218, unsigned int) 5176975e9cSPavel Emelyanov #define TUNGETFILTER _IOR('T', 219, struct sock_fprog) 525eea84f4SMichael S. Tsirkin #define TUNSETVNETLE _IOW('T', 220, int) 535eea84f4SMichael S. Tsirkin #define TUNGETVNETLE _IOR('T', 221, int) 548b8e658bSGreg Kurz /* The TUNSETVNETBE and TUNGETVNETBE ioctls are for cross-endian support on 558b8e658bSGreg Kurz * little-endian hosts. Not all kernel configurations support them, but all 568b8e658bSGreg Kurz * configurations that support SET also support GET. 578b8e658bSGreg Kurz */ 588b8e658bSGreg Kurz #define TUNSETVNETBE _IOW('T', 222, int) 598b8e658bSGreg Kurz #define TUNGETVNETBE _IOR('T', 223, int) 6096f84061SJason Wang #define TUNSETSTEERINGEBPF _IOR('T', 224, int) 61aff3d70aSJason Wang #define TUNSETFILTEREBPF _IOR('T', 225, int) 6226d31925SNicolas Dichtel #define TUNSETCARRIER _IOW('T', 226, int) 630c3e0e3bSKirill Tkhai #define TUNGETDEVNETNS _IO('T', 227) 64607ca46eSDavid Howells 65607ca46eSDavid Howells /* TUNSETIFF ifr flags */ 66607ca46eSDavid Howells #define IFF_TUN 0x0001 67607ca46eSDavid Howells #define IFF_TAP 0x0002 6894317099SPetar Penkov #define IFF_NAPI 0x0010 6990e33d45SPetar Penkov #define IFF_NAPI_FRAGS 0x0020 70195624d9SPatrick Rohr /* Used in TUNSETIFF to bring up tun/tap without carrier */ 71195624d9SPatrick Rohr #define IFF_NO_CARRIER 0x0040 72607ca46eSDavid Howells #define IFF_NO_PI 0x1000 735d097109SMichael S. Tsirkin /* This flag has no real effect */ 74607ca46eSDavid Howells #define IFF_ONE_QUEUE 0x2000 75607ca46eSDavid Howells #define IFF_VNET_HDR 0x4000 76607ca46eSDavid Howells #define IFF_TUN_EXCL 0x8000 77bbb00994SJason Wang #define IFF_MULTI_QUEUE 0x0100 78cde8b15fSJason Wang #define IFF_ATTACH_QUEUE 0x0200 79cde8b15fSJason Wang #define IFF_DETACH_QUEUE 0x0400 80274038f8SPavel Emelyanov /* read-only flag */ 81274038f8SPavel Emelyanov #define IFF_PERSIST 0x0800 82849c9b6fSPavel Emelyanov #define IFF_NOFILTER 0x1000 83607ca46eSDavid Howells 84eda29772SRichard Cochran /* Socket options */ 85eda29772SRichard Cochran #define TUN_TX_TIMESTAMP 1 86eda29772SRichard Cochran 87607ca46eSDavid Howells /* Features for GSO (TUNSETOFFLOAD). */ 88607ca46eSDavid Howells #define TUN_F_CSUM 0x01 /* You can hand me unchecksummed packets. */ 89607ca46eSDavid Howells #define TUN_F_TSO4 0x02 /* I can handle TSO for IPv4 packets */ 90607ca46eSDavid Howells #define TUN_F_TSO6 0x04 /* I can handle TSO for IPv6 packets */ 91607ca46eSDavid Howells #define TUN_F_TSO_ECN 0x08 /* I can handle TSO with ECN bits. */ 92607ca46eSDavid Howells #define TUN_F_UFO 0x10 /* I can handle UFO packets */ 93*b22bbdd1SAndrew Melnychenko #define TUN_F_USO4 0x20 /* I can handle USO for IPv4 packets */ 94*b22bbdd1SAndrew Melnychenko #define TUN_F_USO6 0x40 /* I can handle USO for IPv6 packets */ 95607ca46eSDavid Howells 96607ca46eSDavid Howells /* Protocol info prepended to the packets (when IFF_NO_PI is not set) */ 97607ca46eSDavid Howells #define TUN_PKT_STRIP 0x0001 98607ca46eSDavid Howells struct tun_pi { 99607ca46eSDavid Howells __u16 flags; 100607ca46eSDavid Howells __be16 proto; 101607ca46eSDavid Howells }; 102607ca46eSDavid Howells 103607ca46eSDavid Howells /* 104607ca46eSDavid Howells * Filter spec (used for SETXXFILTER ioctls) 105607ca46eSDavid Howells * This stuff is applicable only to the TAP (Ethernet) devices. 106607ca46eSDavid Howells * If the count is zero the filter is disabled and the driver accepts 107607ca46eSDavid Howells * all packets (promisc mode). 108607ca46eSDavid Howells * If the filter is enabled in order to accept broadcast packets 109607ca46eSDavid Howells * broadcast addr must be explicitly included in the addr list. 110607ca46eSDavid Howells */ 111607ca46eSDavid Howells #define TUN_FLT_ALLMULTI 0x0001 /* Accept all multicast packets */ 112607ca46eSDavid Howells struct tun_filter { 113607ca46eSDavid Howells __u16 flags; /* TUN_FLT_ flags see above */ 114607ca46eSDavid Howells __u16 count; /* Number of addresses */ 11594dfc73eSGustavo A. R. Silva __u8 addr[][ETH_ALEN]; 116607ca46eSDavid Howells }; 117607ca46eSDavid Howells 118607ca46eSDavid Howells #endif /* _UAPI__IF_TUN_H */ 119