LXR linux/include/uapi/linux/if

   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/* TUN device type flags: deprecated. Use IFF_TUN/IFF_TAP instead. */
  26#define TUN_TUN_DEV     IFF_TUN
  27#define TUN_TAP_DEV     IFF_TAP
  28#define TUN_TYPE_MASK   0x000f
  29
  30/* Ioctl defines */
  31#define TUNSETNOCSUM  _IOW('T', 200, int) 
  32#define TUNSETDEBUG   _IOW('T', 201, int) 
  33#define TUNSETIFF     _IOW('T', 202, int) 
  34#define TUNSETPERSIST _IOW('T', 203, int) 
  35#define TUNSETOWNER   _IOW('T', 204, int)
  36#define TUNSETLINK    _IOW('T', 205, int)
  37#define TUNSETGROUP   _IOW('T', 206, int)
  38#define TUNGETFEATURES _IOR('T', 207, unsigned int)
  39#define TUNSETOFFLOAD  _IOW('T', 208, unsigned int)
  40#define TUNSETTXFILTER _IOW('T', 209, unsigned int)
  41#define TUNGETIFF      _IOR('T', 210, unsigned int)
  42#define TUNGETSNDBUF   _IOR('T', 211, int)
  43#define TUNSETSNDBUF   _IOW('T', 212, int)
  44#define TUNATTACHFILTER _IOW('T', 213, struct sock_fprog)
  45#define TUNDETACHFILTER _IOW('T', 214, struct sock_fprog)
  46#define TUNGETVNETHDRSZ _IOR('T', 215, int)
  47#define TUNSETVNETHDRSZ _IOW('T', 216, int)
  48#define TUNSETQUEUE  _IOW('T', 217, int)
  49#define TUNSETIFINDEX   _IOW('T', 218, unsigned int)
  50#define TUNGETFILTER _IOR('T', 219, struct sock_fprog)
  51#define TUNSETVNETLE _IOW('T', 220, int)
  52#define TUNGETVNETLE _IOR('T', 221, int)
  53/* The TUNSETVNETBE and TUNGETVNETBE ioctls are for cross-endian support on
  54 * little-endian hosts. Not all kernel configurations support them, but all
  55 * configurations that support SET also support GET.
  56 */
  57#define TUNSETVNETBE _IOW('T', 222, int)
  58#define TUNGETVNETBE _IOR('T', 223, int)
  59
  60/* TUNSETIFF ifr flags */
  61#define IFF_TUN         0x0001
  62#define IFF_TAP         0x0002
  63#define IFF_NO_PI       0x1000
  64/* This flag has no real effect */
  65#define IFF_ONE_QUEUE   0x2000
  66#define IFF_VNET_HDR    0x4000
  67#define IFF_TUN_EXCL    0x8000
  68#define IFF_MULTI_QUEUE 0x0100
  69#define IFF_ATTACH_QUEUE 0x0200
  70#define IFF_DETACH_QUEUE 0x0400
  71/* read-only flag */
  72#define IFF_PERSIST     0x0800
  73#define IFF_NOFILTER    0x1000
  74
  75/* Socket options */
  76#define TUN_TX_TIMESTAMP 1
  77
  78/* Features for GSO (TUNSETOFFLOAD). */
  79#define TUN_F_CSUM      0x01    /* You can hand me unchecksummed packets. */
  80#define TUN_F_TSO4      0x02    /* I can handle TSO for IPv4 packets */
  81#define TUN_F_TSO6      0x04    /* I can handle TSO for IPv6 packets */
  82#define TUN_F_TSO_ECN   0x08    /* I can handle TSO with ECN bits. */
  83#define TUN_F_UFO       0x10    /* I can handle UFO packets */
  84
  85/* Protocol info prepended to the packets (when IFF_NO_PI is not set) */
  86#define TUN_PKT_STRIP   0x0001
  87struct tun_pi {
  88        __u16  flags;
  89        __be16 proto;
  90};
  91
  92/*
  93 * Filter spec (used for SETXXFILTER ioctls)
  94 * This stuff is applicable only to the TAP (Ethernet) devices.
  95 * If the count is zero the filter is disabled and the driver accepts
  96 * all packets (promisc mode).
  97 * If the filter is enabled in order to accept broadcast packets
  98 * broadcast addr must be explicitly included in the addr list.
  99 */
 100#define TUN_FLT_ALLMULTI 0x0001 /* Accept all multicast packets */
 101struct tun_filter {
 102        __u16  flags; /* TUN_FLT_ flags see above */
 103        __u16  count; /* Number of addresses */
 104        __u8   addr[0][ETH_ALEN];
 105};
 106
 107#endif /* _UAPI__IF_TUN_H */
 108