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
  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