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