LXR linux/include/uapi/linux/if

   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#define IFF_NO_PI       0x1000
  71/* This flag has no real effect */
  72#define IFF_ONE_QUEUE   0x2000
  73#define IFF_VNET_HDR    0x4000
  74#define IFF_TUN_EXCL    0x8000
  75#define IFF_MULTI_QUEUE 0x0100
  76#define IFF_ATTACH_QUEUE 0x0200
  77#define IFF_DETACH_QUEUE 0x0400
  78/* read-only flag */
  79#define IFF_PERSIST     0x0800
  80#define IFF_NOFILTER    0x1000
  81
  82/* Socket options */
  83#define TUN_TX_TIMESTAMP 1
  84
  85/* Features for GSO (TUNSETOFFLOAD). */
  86#define TUN_F_CSUM      0x01    /* You can hand me unchecksummed packets. */
  87#define TUN_F_TSO4      0x02    /* I can handle TSO for IPv4 packets */
  88#define TUN_F_TSO6      0x04    /* I can handle TSO for IPv6 packets */
  89#define TUN_F_TSO_ECN   0x08    /* I can handle TSO with ECN bits. */
  90#define TUN_F_UFO       0x10    /* I can handle UFO packets */
  91
  92/* Protocol info prepended to the packets (when IFF_NO_PI is not set) */
  93#define TUN_PKT_STRIP   0x0001
  94struct tun_pi {
  95        __u16  flags;
  96        __be16 proto;
  97};
  98
  99/*
 100 * Filter spec (used for SETXXFILTER ioctls)
 101 * This stuff is applicable only to the TAP (Ethernet) devices.
 102 * If the count is zero the filter is disabled and the driver accepts
 103 * all packets (promisc mode).
 104 * If the filter is enabled in order to accept broadcast packets
 105 * broadcast addr must be explicitly included in the addr list.
 106 */
 107#define TUN_FLT_ALLMULTI 0x0001 /* Accept all multicast packets */
 108struct tun_filter {
 109        __u16  flags; /* TUN_FLT_ flags see above */
 110        __u16  count; /* Number of addresses */
 111        __u8   addr[0][ETH_ALEN];
 112};
 113
 114#endif /* _UAPI__IF_TUN_H */
 115