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 98struct 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 */ 112struct 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