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/* This flag has no real effect */ 35#define TUN_ONE_QUEUE 0x0080 36#define TUN_PERSIST 0x0100 37#define TUN_VNET_HDR 0x0200 38#define TUN_TAP_MQ 0x0400 39 40/* Ioctl defines */ 41#define TUNSETNOCSUM _IOW('T', 200, int) 42#define TUNSETDEBUG _IOW('T', 201, int) 43#define TUNSETIFF _IOW('T', 202, int) 44#define TUNSETPERSIST _IOW('T', 203, int) 45#define TUNSETOWNER _IOW('T', 204, int) 46#define TUNSETLINK _IOW('T', 205, int) 47#define TUNSETGROUP _IOW('T', 206, int) 48#define TUNGETFEATURES _IOR('T', 207, unsigned int) 49#define TUNSETOFFLOAD _IOW('T', 208, unsigned int) 50#define TUNSETTXFILTER _IOW('T', 209, unsigned int) 51#define TUNGETIFF _IOR('T', 210, unsigned int) 52#define TUNGETSNDBUF _IOR('T', 211, int) 53#define TUNSETSNDBUF _IOW('T', 212, int) 54#define TUNATTACHFILTER _IOW('T', 213, struct sock_fprog) 55#define TUNDETACHFILTER _IOW('T', 214, struct sock_fprog) 56#define TUNGETVNETHDRSZ _IOR('T', 215, int) 57#define TUNSETVNETHDRSZ _IOW('T', 216, int) 58#define TUNSETQUEUE _IOW('T', 217, int) 59#define TUNSETIFINDEX _IOW('T', 218, unsigned int) 60#define TUNGETFILTER _IOR('T', 219, struct sock_fprog) 61 62/* TUNSETIFF ifr flags */ 63#define IFF_TUN 0x0001 64#define IFF_TAP 0x0002 65#define IFF_NO_PI 0x1000 66/* This flag has no real effect */ 67#define IFF_ONE_QUEUE 0x2000 68#define IFF_VNET_HDR 0x4000 69#define IFF_TUN_EXCL 0x8000 70#define IFF_MULTI_QUEUE 0x0100 71#define IFF_ATTACH_QUEUE 0x0200 72#define IFF_DETACH_QUEUE 0x0400 73/* read-only flag */ 74#define IFF_PERSIST 0x0800 75#define IFF_NOFILTER 0x1000 76 77/* Socket options */ 78#define TUN_TX_TIMESTAMP 1 79 80/* Features for GSO (TUNSETOFFLOAD). */ 81#define TUN_F_CSUM 0x01 /* You can hand me unchecksummed packets. */ 82#define TUN_F_TSO4 0x02 /* I can handle TSO for IPv4 packets */ 83#define TUN_F_TSO6 0x04 /* I can handle TSO for IPv6 packets */ 84#define TUN_F_TSO_ECN 0x08 /* I can handle TSO with ECN bits. */ 85#define TUN_F_UFO 0x10 /* I can handle UFO packets */ 86 87/* Protocol info prepended to the packets (when IFF_NO_PI is not set) */ 88#define TUN_PKT_STRIP 0x0001 89struct tun_pi { 90 __u16 flags; 91 __be16 proto; 92}; 93 94/* 95 * Filter spec (used for SETXXFILTER ioctls) 96 * This stuff is applicable only to the TAP (Ethernet) devices. 97 * If the count is zero the filter is disabled and the driver accepts 98 * all packets (promisc mode). 99 * If the filter is enabled in order to accept broadcast packets 100 * broadcast addr must be explicitly included in the addr list. 101 */ 102#define TUN_FLT_ALLMULTI 0x0001 /* Accept all multicast packets */ 103struct tun_filter { 104 __u16 flags; /* TUN_FLT_ flags see above */ 105 __u16 count; /* Number of addresses */ 106 __u8 addr[0][ETH_ALEN]; 107}; 108 109#endif /* _UAPI__IF_TUN_H */ 110