/*
   * This file define a set of standard wireless extensions
   *
   * Version :	22	16.3.07
   *
   * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
   * Copyright (c) 1997-2007 Jean Tourrilhes, All Rights Reserved.
   */
  
  #ifndef _UAPI_LINUX_WIRELESS_H
  #define _UAPI_LINUX_WIRELESS_H
  
  /************************** DOCUMENTATION **************************/
  /*
   * Initial APIs (1996 -> onward) :
   * -----------------------------
   * Basically, the wireless extensions are for now a set of standard ioctl
   * call + /proc/net/wireless
   *
   * The entry /proc/net/wireless give statistics and information on the
   * driver.
   * This is better than having each driver having its entry because
   * its centralised and we may remove the driver module safely.
   *
   * Ioctl are used to configure the driver and issue commands.  This is
   * better than command line options of insmod because we may want to
   * change dynamically (while the driver is running) some parameters.
   *
   * The ioctl mechanimsm are copied from standard devices ioctl.
   * We have the list of command plus a structure descibing the
   * data exchanged...
   * Note that to add these ioctl, I was obliged to modify :
   *	# net/core/dev.c (two place + add include)
   *	# net/ipv4/af_inet.c (one place + add include)
   *
   * /proc/net/wireless is a copy of /proc/net/dev.
   * We have a structure for data passed from the driver to /proc/net/wireless
   * Too add this, I've modified :
   *	# net/core/dev.c (two other places)
   *	# include/linux/netdevice.h (one place)
   *	# include/linux/proc_fs.h (one place)
   *
   * New driver API (2002 -> onward) :
   * -------------------------------
   * This file is only concerned with the user space API and common definitions.
   * The new driver API is defined and documented in :
   *	# include/net/iw_handler.h
   *
   * Note as well that /proc/net/wireless implementation has now moved in :
   *	# net/core/wireless.c
   *
   * Wireless Events (2002 -> onward) :
   * --------------------------------
   * Events are defined at the end of this file, and implemented in :
   *	# net/core/wireless.c
   *
   * Other comments :
   * --------------
   * Do not add here things that are redundant with other mechanisms
   * (drivers init, ifconfig, /proc/net/dev, ...) and with are not
   * wireless specific.
   *
   * These wireless extensions are not magic : each driver has to provide
   * support for them...
   *
   * IMPORTANT NOTE : As everything in the kernel, this is very much a
   * work in progress. Contact me if you have ideas of improvements...
   */
  
  /***************************** INCLUDES *****************************/
  
  #include <linux/types.h>		/* for __u* and __s* typedefs */
  #include <linux/socket.h>		/* for "struct sockaddr" et al	*/
  #include <linux/if.h>			/* for IFNAMSIZ and co... */
  
  /***************************** VERSION *****************************/
  /*
   * This constant is used to know the availability of the wireless
   * extensions and to know which version of wireless extensions it is
   * (there is some stuff that will be added in the future...)
   * I just plan to increment with each new version.
   */
  #define WIRELESS_EXT	22
  
  /*
   * Changes :
   *
   * V2 to V3
   * --------
   *	Alan Cox start some incompatibles changes. I've integrated a bit more.
   *	- Encryption renamed to Encode to avoid US regulation problems
   *	- Frequency changed from float to struct to avoid problems on old 386
   *
   * V3 to V4
   * --------
   *	- Add sensitivity
   *
   * V4 to V5
   * --------
   *	- Missing encoding definitions in range
   *	- Access points stuff
   *
   * V5 to V6
   * --------
   *	- 802.11 support (ESSID ioctls)
   *
   * V6 to V7
   * --------
   *	- define IW_ESSID_MAX_SIZE and IW_MAX_AP
   *
   * V7 to V8
   * --------
   *	- Changed my e-mail address
   *	- More 802.11 support (nickname, rate, rts, frag)
   *	- List index in frequencies
   *
   * V8 to V9
   * --------
   *	- Support for 'mode of operation' (ad-hoc, managed...)
   *	- Support for unicast and multicast power saving
   *	- Change encoding to support larger tokens (>64 bits)
   *	- Updated iw_params (disable, flags) and use it for NWID
   *	- Extracted iw_point from iwreq for clarity
   *
   * V9 to V10
   * ---------
   *	- Add PM capability to range structure
   *	- Add PM modifier : MAX/MIN/RELATIVE
   *	- Add encoding option : IW_ENCODE_NOKEY
   *	- Add TxPower ioctls (work like TxRate)
   *
   * V10 to V11
   * ----------
   *	- Add WE version in range (help backward/forward compatibility)
   *	- Add retry ioctls (work like PM)
   *
   * V11 to V12
   * ----------
   *	- Add SIOCSIWSTATS to get /proc/net/wireless programatically
   *	- Add DEV PRIVATE IOCTL to avoid collisions in SIOCDEVPRIVATE space
   *	- Add new statistics (frag, retry, beacon)
   *	- Add average quality (for user space calibration)
   *
   * V12 to V13
   * ----------
   *	- Document creation of new driver API.
   *	- Extract union iwreq_data from struct iwreq (for new driver API).
   *	- Rename SIOCSIWNAME as SIOCSIWCOMMIT
   *
   * V13 to V14
   * ----------
   *	- Wireless Events support : define struct iw_event
   *	- Define additional specific event numbers
   *	- Add "addr" and "param" fields in union iwreq_data
   *	- AP scanning stuff (SIOCSIWSCAN and friends)
   *
   * V14 to V15
   * ----------
   *	- Add IW_PRIV_TYPE_ADDR for struct sockaddr private arg
   *	- Make struct iw_freq signed (both m & e), add explicit padding
   *	- Add IWEVCUSTOM for driver specific event/scanning token
   *	- Add IW_MAX_GET_SPY for driver returning a lot of addresses
   *	- Add IW_TXPOW_RANGE for range of Tx Powers
   *	- Add IWEVREGISTERED & IWEVEXPIRED events for Access Points
   *	- Add IW_MODE_MONITOR for passive monitor
   *
   * V15 to V16
   * ----------
   *	- Increase the number of bitrates in iw_range to 32 (for 802.11g)
   *	- Increase the number of frequencies in iw_range to 32 (for 802.11b+a)
   *	- Reshuffle struct iw_range for increases, add filler
   *	- Increase IW_MAX_AP to 64 for driver returning a lot of addresses
   *	- Remove IW_MAX_GET_SPY because conflict with enhanced spy support
   *	- Add SIOCSIWTHRSPY/SIOCGIWTHRSPY and "struct iw_thrspy"
   *	- Add IW_ENCODE_TEMP and iw_range->encoding_login_index
   *
   * V16 to V17
   * ----------
   *	- Add flags to frequency -> auto/fixed
   *	- Document (struct iw_quality *)->updated, add new flags (INVALID)
   *	- Wireless Event capability in struct iw_range
   *	- Add support for relative TxPower (yick !)
   *
   * V17 to V18 (From Jouni Malinen <j@w1.fi>)
   * ----------
   *	- Add support for WPA/WPA2
   *	- Add extended encoding configuration (SIOCSIWENCODEEXT and
   *	  SIOCGIWENCODEEXT)
   *	- Add SIOCSIWGENIE/SIOCGIWGENIE
   *	- Add SIOCSIWMLME
   *	- Add SIOCSIWPMKSA
   *	- Add struct iw_range bit field for supported encoding capabilities
   *	- Add optional scan request parameters for SIOCSIWSCAN
   *	- Add SIOCSIWAUTH/SIOCGIWAUTH for setting authentication and WPA
   *	  related parameters (extensible up to 4096 parameter values)
   *	- Add wireless events: IWEVGENIE, IWEVMICHAELMICFAILURE,
   *	  IWEVASSOCREQIE, IWEVASSOCRESPIE, IWEVPMKIDCAND
   *
   * V18 to V19
   * ----------
   *	- Remove (struct iw_point *)->pointer from events and streams
   *	- Remove header includes to help user space
   *	- Increase IW_ENCODING_TOKEN_MAX from 32 to 64
   *	- Add IW_QUAL_ALL_UPDATED and IW_QUAL_ALL_INVALID macros
   *	- Add explicit flag to tell stats are in dBm : IW_QUAL_DBM
   *	- Add IW_IOCTL_IDX() and IW_EVENT_IDX() macros
   *
   * V19 to V20
   * ----------
   *	- RtNetlink requests support (SET/GET)
   *
   * V20 to V21
   * ----------
   *	- Remove (struct net_device *)->get_wireless_stats()
   *	- Change length in ESSID and NICK to strlen() instead of strlen()+1
   *	- Add IW_RETRY_SHORT/IW_RETRY_LONG retry modifiers
   *	- Power/Retry relative values no longer * 100000
   *	- Add explicit flag to tell stats are in 802.11k RCPI : IW_QUAL_RCPI
   *
   * V21 to V22
   * ----------
   *	- Prevent leaking of kernel space in stream on 64 bits.
   */
  
  /**************************** CONSTANTS ****************************/
  
  /* -------------------------- IOCTL LIST -------------------------- */
  
  /* Wireless Identification */
  #define SIOCSIWCOMMIT	0x8B00		/* Commit pending changes to driver */
  #define SIOCGIWNAME	0x8B01		/* get name == wireless protocol */
  /* SIOCGIWNAME is used to verify the presence of Wireless Extensions.
   * Common values : "IEEE 802.11-DS", "IEEE 802.11-FH", "IEEE 802.11b"...
   * Don't put the name of your driver there, it's useless. */
  
  /* Basic operations */
  #define SIOCSIWNWID	0x8B02		/* set network id (pre-802.11) */
  #define SIOCGIWNWID	0x8B03		/* get network id (the cell) */
  #define SIOCSIWFREQ	0x8B04		/* set channel/frequency (Hz) */
  #define SIOCGIWFREQ	0x8B05		/* get channel/frequency (Hz) */
  #define SIOCSIWMODE	0x8B06		/* set operation mode */
  #define SIOCGIWMODE	0x8B07		/* get operation mode */
  #define SIOCSIWSENS	0x8B08		/* set sensitivity (dBm) */
  #define SIOCGIWSENS	0x8B09		/* get sensitivity (dBm) */
  
  /* Informative stuff */
  #define SIOCSIWRANGE	0x8B0A		/* Unused */
  #define SIOCGIWRANGE	0x8B0B		/* Get range of parameters */
  #define SIOCSIWPRIV	0x8B0C		/* Unused */
  #define SIOCGIWPRIV	0x8B0D		/* get private ioctl interface info */
  #define SIOCSIWSTATS	0x8B0E		/* Unused */
  #define SIOCGIWSTATS	0x8B0F		/* Get /proc/net/wireless stats */
  /* SIOCGIWSTATS is strictly used between user space and the kernel, and
   * is never passed to the driver (i.e. the driver will never see it). */
  
  /* Spy support (statistics per MAC address - used for Mobile IP support) */
  #define SIOCSIWSPY	0x8B10		/* set spy addresses */
  #define SIOCGIWSPY	0x8B11		/* get spy info (quality of link) */
  #define SIOCSIWTHRSPY	0x8B12		/* set spy threshold (spy event) */
  #define SIOCGIWTHRSPY	0x8B13		/* get spy threshold */
  
  /* Access Point manipulation */
  #define SIOCSIWAP	0x8B14		/* set access point MAC addresses */
  #define SIOCGIWAP	0x8B15		/* get access point MAC addresses */
  #define SIOCGIWAPLIST	0x8B17		/* Deprecated in favor of scanning */
  #define SIOCSIWSCAN	0x8B18		/* trigger scanning (list cells) */
  #define SIOCGIWSCAN	0x8B19		/* get scanning results */
  
  /* 802.11 specific support */
  #define SIOCSIWESSID	0x8B1A		/* set ESSID (network name) */
  #define SIOCGIWESSID	0x8B1B		/* get ESSID */
  #define SIOCSIWNICKN	0x8B1C		/* set node name/nickname */
  #define SIOCGIWNICKN	0x8B1D		/* get node name/nickname */
  /* As the ESSID and NICKN are strings up to 32 bytes long, it doesn't fit
   * within the 'iwreq' structure, so we need to use the 'data' member to
   * point to a string in user space, like it is done for RANGE... */
  
  /* Other parameters useful in 802.11 and some other devices */
  #define SIOCSIWRATE	0x8B20		/* set default bit rate (bps) */
  #define SIOCGIWRATE	0x8B21		/* get default bit rate (bps) */
  #define SIOCSIWRTS	0x8B22		/* set RTS/CTS threshold (bytes) */
  #define SIOCGIWRTS	0x8B23		/* get RTS/CTS threshold (bytes) */
  #define SIOCSIWFRAG	0x8B24		/* set fragmentation thr (bytes) */
  #define SIOCGIWFRAG	0x8B25		/* get fragmentation thr (bytes) */
  #define SIOCSIWTXPOW	0x8B26		/* set transmit power (dBm) */
  #define SIOCGIWTXPOW	0x8B27		/* get transmit power (dBm) */
  #define SIOCSIWRETRY	0x8B28		/* set retry limits and lifetime */
  #define SIOCGIWRETRY	0x8B29		/* get retry limits and lifetime */
  
  /* Encoding stuff (scrambling, hardware security, WEP...) */
  #define SIOCSIWENCODE	0x8B2A		/* set encoding token & mode */
  #define SIOCGIWENCODE	0x8B2B		/* get encoding token & mode */
  /* Power saving stuff (power management, unicast and multicast) */
  #define SIOCSIWPOWER	0x8B2C		/* set Power Management settings */
  #define SIOCGIWPOWER	0x8B2D		/* get Power Management settings */
  
  /* WPA : Generic IEEE 802.11 informatiom element (e.g., for WPA/RSN/WMM).
   * This ioctl uses struct iw_point and data buffer that includes IE id and len
   * fields. More than one IE may be included in the request. Setting the generic
   * IE to empty buffer (len=0) removes the generic IE from the driver. Drivers
   * are allowed to generate their own WPA/RSN IEs, but in these cases, drivers
   * are required to report the used IE as a wireless event, e.g., when
   * associating with an AP. */
  #define SIOCSIWGENIE	0x8B30		/* set generic IE */
  #define SIOCGIWGENIE	0x8B31		/* get generic IE */
  
  /* WPA : IEEE 802.11 MLME requests */
  #define SIOCSIWMLME	0x8B16		/* request MLME operation; uses
  					 * struct iw_mlme */
  /* WPA : Authentication mode parameters */
  #define SIOCSIWAUTH	0x8B32		/* set authentication mode params */
  #define SIOCGIWAUTH	0x8B33		/* get authentication mode params */
  
  /* WPA : Extended version of encoding configuration */
  #define SIOCSIWENCODEEXT 0x8B34		/* set encoding token & mode */
  #define SIOCGIWENCODEEXT 0x8B35		/* get encoding token & mode */
  
  /* WPA2 : PMKSA cache management */
  #define SIOCSIWPMKSA	0x8B36		/* PMKSA cache operation */
  
  /* -------------------- DEV PRIVATE IOCTL LIST -------------------- */
  
  /* These 32 ioctl are wireless device private, for 16 commands.
   * Each driver is free to use them for whatever purpose it chooses,
   * however the driver *must* export the description of those ioctls
   * with SIOCGIWPRIV and *must* use arguments as defined below.
   * If you don't follow those rules, DaveM is going to hate you (reason :
   * it make mixed 32/64bit operation impossible).
   */
  #define SIOCIWFIRSTPRIV	0x8BE0
  #define SIOCIWLASTPRIV	0x8BFF
  /* Previously, we were using SIOCDEVPRIVATE, but we now have our
   * separate range because of collisions with other tools such as
   * 'mii-tool'.
   * We now have 32 commands, so a bit more space ;-).
   * Also, all 'even' commands are only usable by root and don't return the
   * content of ifr/iwr to user (but you are not obliged to use the set/get
   * convention, just use every other two command). More details in iwpriv.c.
   * And I repeat : you are not forced to use them with iwpriv, but you
   * must be compliant with it.
   */
  
  /* ------------------------- IOCTL STUFF ------------------------- */
  
  /* The first and the last (range) */
  #define SIOCIWFIRST	0x8B00
  #define SIOCIWLAST	SIOCIWLASTPRIV		/* 0x8BFF */
  #define IW_IOCTL_IDX(cmd)	((cmd) - SIOCIWFIRST)
  #define IW_HANDLER(id, func)			\
  	[IW_IOCTL_IDX(id)] = func
  
  /* Odd : get (world access), even : set (root access) */
  #define IW_IS_SET(cmd)	(!((cmd) & 0x1))
  #define IW_IS_GET(cmd)	((cmd) & 0x1)
  
  /* ----------------------- WIRELESS EVENTS ----------------------- */
  /* Those are *NOT* ioctls, do not issue request on them !!! */
  /* Most events use the same identifier as ioctl requests */
  
  #define IWEVTXDROP	0x8C00		/* Packet dropped to excessive retry */
  #define IWEVQUAL	0x8C01		/* Quality part of statistics (scan) */
  #define IWEVCUSTOM	0x8C02		/* Driver specific ascii string */
  #define IWEVREGISTERED	0x8C03		/* Discovered a new node (AP mode) */
  #define IWEVEXPIRED	0x8C04		/* Expired a node (AP mode) */
  #define IWEVGENIE	0x8C05		/* Generic IE (WPA, RSN, WMM, ..)
  					 * (scan results); This includes id and
  					 * length fields. One IWEVGENIE may
  					 * contain more than one IE. Scan
  					 * results may contain one or more
  					 * IWEVGENIE events. */
  #define IWEVMICHAELMICFAILURE 0x8C06	/* Michael MIC failure
  					 * (struct iw_michaelmicfailure)
  					 */
  #define IWEVASSOCREQIE	0x8C07		/* IEs used in (Re)Association Request.
  					 * The data includes id and length
  					 * fields and may contain more than one
  					 * IE. This event is required in
  					 * Managed mode if the driver
  					 * generates its own WPA/RSN IE. This
  					 * should be sent just before
  					 * IWEVREGISTERED event for the
  					 * association. */
  #define IWEVASSOCRESPIE	0x8C08		/* IEs used in (Re)Association
  					 * Response. The data includes id and
  					 * length fields and may contain more
  					 * than one IE. This may be sent
  					 * between IWEVASSOCREQIE and
  					 * IWEVREGISTERED events for the
  					 * association. */
  #define IWEVPMKIDCAND	0x8C09		/* PMKID candidate for RSN
  					 * pre-authentication
  					 * (struct iw_pmkid_cand) */
  
  #define IWEVFIRST	0x8C00
  #define IW_EVENT_IDX(cmd)	((cmd) - IWEVFIRST)
  
  /* ------------------------- PRIVATE INFO ------------------------- */
  /*
   * The following is used with SIOCGIWPRIV. It allow a driver to define
   * the interface (name, type of data) for its private ioctl.
   * Privates ioctl are SIOCIWFIRSTPRIV -> SIOCIWLASTPRIV
   */
  
  #define IW_PRIV_TYPE_MASK	0x7000	/* Type of arguments */
  #define IW_PRIV_TYPE_NONE	0x0000
  #define IW_PRIV_TYPE_BYTE	0x1000	/* Char as number */
  #define IW_PRIV_TYPE_CHAR	0x2000	/* Char as character */
  #define IW_PRIV_TYPE_INT	0x4000	/* 32 bits int */
  #define IW_PRIV_TYPE_FLOAT	0x5000	/* struct iw_freq */
  #define IW_PRIV_TYPE_ADDR	0x6000	/* struct sockaddr */
  
  #define IW_PRIV_SIZE_FIXED	0x0800	/* Variable or fixed number of args */
  
  #define IW_PRIV_SIZE_MASK	0x07FF	/* Max number of those args */
  
  /*
   * Note : if the number of args is fixed and the size < 16 octets,
   * instead of passing a pointer we will put args in the iwreq struct...
   */
  
  /* ----------------------- OTHER CONSTANTS ----------------------- */
  
  /* Maximum frequencies in the range struct */
  #define IW_MAX_FREQUENCIES	32
  /* Note : if you have something like 80 frequencies,
   * don't increase this constant and don't fill the frequency list.
   * The user will be able to set by channel anyway... */
  
  /* Maximum bit rates in the range struct */
  #define IW_MAX_BITRATES		32
  
  /* Maximum tx powers in the range struct */
  #define IW_MAX_TXPOWER		8
  /* Note : if you more than 8 TXPowers, just set the max and min or
   * a few of them in the struct iw_range. */
  
  /* Maximum of address that you may set with SPY */
  #define IW_MAX_SPY		8
  
  /* Maximum of address that you may get in the
     list of access points in range */
  #define IW_MAX_AP		64
  
  /* Maximum size of the ESSID and NICKN strings */
  #define IW_ESSID_MAX_SIZE	32
  
  /* Modes of operation */
  #define IW_MODE_AUTO	0	/* Let the driver decides */
  #define IW_MODE_ADHOC	1	/* Single cell network */
  #define IW_MODE_INFRA	2	/* Multi cell network, roaming, ... */
  #define IW_MODE_MASTER	3	/* Synchronisation master or Access Point */
  #define IW_MODE_REPEAT	4	/* Wireless Repeater (forwarder) */
  #define IW_MODE_SECOND	5	/* Secondary master/repeater (backup) */
  #define IW_MODE_MONITOR	6	/* Passive monitor (listen only) */
  #define IW_MODE_MESH	7	/* Mesh (IEEE 802.11s) network */
  
  /* Statistics flags (bitmask in updated) */
  #define IW_QUAL_QUAL_UPDATED	0x01	/* Value was updated since last read */
  #define IW_QUAL_LEVEL_UPDATED	0x02
  #define IW_QUAL_NOISE_UPDATED	0x04
  #define IW_QUAL_ALL_UPDATED	0x07
  #define IW_QUAL_DBM		0x08	/* Level + Noise are dBm */
  #define IW_QUAL_QUAL_INVALID	0x10	/* Driver doesn't provide value */
  #define IW_QUAL_LEVEL_INVALID	0x20
  #define IW_QUAL_NOISE_INVALID	0x40
  #define IW_QUAL_RCPI		0x80	/* Level + Noise are 802.11k RCPI */
  #define IW_QUAL_ALL_INVALID	0x70
  
  /* Frequency flags */
  #define IW_FREQ_AUTO		0x00	/* Let the driver decides */
  #define IW_FREQ_FIXED		0x01	/* Force a specific value */
  
  /* Maximum number of size of encoding token available
   * they are listed in the range structure */
  #define IW_MAX_ENCODING_SIZES	8
  
  /* Maximum size of the encoding token in bytes */
  #define IW_ENCODING_TOKEN_MAX	64	/* 512 bits (for now) */
  
  /* Flags for encoding (along with the token) */
  #define IW_ENCODE_INDEX		0x00FF	/* Token index (if needed) */
  #define IW_ENCODE_FLAGS		0xFF00	/* Flags defined below */
  #define IW_ENCODE_MODE		0xF000	/* Modes defined below */
  #define IW_ENCODE_DISABLED	0x8000	/* Encoding disabled */
  #define IW_ENCODE_ENABLED	0x0000	/* Encoding enabled */
  #define IW_ENCODE_RESTRICTED	0x4000	/* Refuse non-encoded packets */
  #define IW_ENCODE_OPEN		0x2000	/* Accept non-encoded packets */
  #define IW_ENCODE_NOKEY		0x0800  /* Key is write only, so not present */
  #define IW_ENCODE_TEMP		0x0400  /* Temporary key */
  
  /* Power management flags available (along with the value, if any) */
  #define IW_POWER_ON		0x0000	/* No details... */
  #define IW_POWER_TYPE		0xF000	/* Type of parameter */
  #define IW_POWER_PERIOD		0x1000	/* Value is a period/duration of  */
  #define IW_POWER_TIMEOUT	0x2000	/* Value is a timeout (to go asleep) */
  #define IW_POWER_MODE		0x0F00	/* Power Management mode */
  #define IW_POWER_UNICAST_R	0x0100	/* Receive only unicast messages */
  #define IW_POWER_MULTICAST_R	0x0200	/* Receive only multicast messages */
  #define IW_POWER_ALL_R		0x0300	/* Receive all messages though PM */
  #define IW_POWER_FORCE_S	0x0400	/* Force PM procedure for sending unicast */
  #define IW_POWER_REPEATER	0x0800	/* Repeat broadcast messages in PM period */
  #define IW_POWER_MODIFIER	0x000F	/* Modify a parameter */
  #define IW_POWER_MIN		0x0001	/* Value is a minimum  */
  #define IW_POWER_MAX		0x0002	/* Value is a maximum */
  #define IW_POWER_RELATIVE	0x0004	/* Value is not in seconds/ms/us */
  
  /* Transmit Power flags available */
  #define IW_TXPOW_TYPE		0x00FF	/* Type of value */
  #define IW_TXPOW_DBM		0x0000	/* Value is in dBm */
  #define IW_TXPOW_MWATT		0x0001	/* Value is in mW */
  #define IW_TXPOW_RELATIVE	0x0002	/* Value is in arbitrary units */
  #define IW_TXPOW_RANGE		0x1000	/* Range of value between min/max */
  
  /* Retry limits and lifetime flags available */
  #define IW_RETRY_ON		0x0000	/* No details... */
  #define IW_RETRY_TYPE		0xF000	/* Type of parameter */
  #define IW_RETRY_LIMIT		0x1000	/* Maximum number of retries*/
  #define IW_RETRY_LIFETIME	0x2000	/* Maximum duration of retries in us */
  #define IW_RETRY_MODIFIER	0x00FF	/* Modify a parameter */
  #define IW_RETRY_MIN		0x0001	/* Value is a minimum  */
  #define IW_RETRY_MAX		0x0002	/* Value is a maximum */
  #define IW_RETRY_RELATIVE	0x0004	/* Value is not in seconds/ms/us */
  #define IW_RETRY_SHORT		0x0010	/* Value is for short packets  */
  #define IW_RETRY_LONG		0x0020	/* Value is for long packets */
  
  /* Scanning request flags */
  #define IW_SCAN_DEFAULT		0x0000	/* Default scan of the driver */
  #define IW_SCAN_ALL_ESSID	0x0001	/* Scan all ESSIDs */
  #define IW_SCAN_THIS_ESSID	0x0002	/* Scan only this ESSID */
  #define IW_SCAN_ALL_FREQ	0x0004	/* Scan all Frequencies */
  #define IW_SCAN_THIS_FREQ	0x0008	/* Scan only this Frequency */
  #define IW_SCAN_ALL_MODE	0x0010	/* Scan all Modes */
  #define IW_SCAN_THIS_MODE	0x0020	/* Scan only this Mode */
  #define IW_SCAN_ALL_RATE	0x0040	/* Scan all Bit-Rates */
  #define IW_SCAN_THIS_RATE	0x0080	/* Scan only this Bit-Rate */
  /* struct iw_scan_req scan_type */
  #define IW_SCAN_TYPE_ACTIVE 0
  #define IW_SCAN_TYPE_PASSIVE 1
  /* Maximum size of returned data */
  #define IW_SCAN_MAX_DATA	4096	/* In bytes */
  
  /* Scan capability flags - in (struct iw_range *)->scan_capa */
  #define IW_SCAN_CAPA_NONE		0x00
  #define IW_SCAN_CAPA_ESSID		0x01
  #define IW_SCAN_CAPA_BSSID		0x02
  #define IW_SCAN_CAPA_CHANNEL	0x04
  #define IW_SCAN_CAPA_MODE		0x08
  #define IW_SCAN_CAPA_RATE		0x10
  #define IW_SCAN_CAPA_TYPE		0x20
  #define IW_SCAN_CAPA_TIME		0x40
  
  /* Max number of char in custom event - use multiple of them if needed */
  #define IW_CUSTOM_MAX		256	/* In bytes */
  
  /* Generic information element */
  #define IW_GENERIC_IE_MAX	1024
  
  /* MLME requests (SIOCSIWMLME / struct iw_mlme) */
  #define IW_MLME_DEAUTH		0
  #define IW_MLME_DISASSOC	1
  #define IW_MLME_AUTH		2
  #define IW_MLME_ASSOC		3
  
  /* SIOCSIWAUTH/SIOCGIWAUTH struct iw_param flags */
  #define IW_AUTH_INDEX		0x0FFF
  #define IW_AUTH_FLAGS		0xF000
  /* SIOCSIWAUTH/SIOCGIWAUTH parameters (0 .. 4095)
   * (IW_AUTH_INDEX mask in struct iw_param flags; this is the index of the
   * parameter that is being set/get to; value will be read/written to
   * struct iw_param value field) */
  #define IW_AUTH_WPA_VERSION		0
  #define IW_AUTH_CIPHER_PAIRWISE		1
  #define IW_AUTH_CIPHER_GROUP		2
  #define IW_AUTH_KEY_MGMT		3
  #define IW_AUTH_TKIP_COUNTERMEASURES	4
  #define IW_AUTH_DROP_UNENCRYPTED	5
  #define IW_AUTH_80211_AUTH_ALG		6
  #define IW_AUTH_WPA_ENABLED		7
  #define IW_AUTH_RX_UNENCRYPTED_EAPOL	8
  #define IW_AUTH_ROAMING_CONTROL		9
  #define IW_AUTH_PRIVACY_INVOKED		10
  #define IW_AUTH_CIPHER_GROUP_MGMT	11
  #define IW_AUTH_MFP			12
  
  /* IW_AUTH_WPA_VERSION values (bit field) */
  #define IW_AUTH_WPA_VERSION_DISABLED	0x00000001
  #define IW_AUTH_WPA_VERSION_WPA		0x00000002
  #define IW_AUTH_WPA_VERSION_WPA2	0x00000004
  
  /* IW_AUTH_PAIRWISE_CIPHER, IW_AUTH_GROUP_CIPHER, and IW_AUTH_CIPHER_GROUP_MGMT
   * values (bit field) */
  #define IW_AUTH_CIPHER_NONE	0x00000001
  #define IW_AUTH_CIPHER_WEP40	0x00000002
  #define IW_AUTH_CIPHER_TKIP	0x00000004
  #define IW_AUTH_CIPHER_CCMP	0x00000008
  #define IW_AUTH_CIPHER_WEP104	0x00000010
  #define IW_AUTH_CIPHER_AES_CMAC	0x00000020
  
  /* IW_AUTH_KEY_MGMT values (bit field) */
  #define IW_AUTH_KEY_MGMT_802_1X	1
  #define IW_AUTH_KEY_MGMT_PSK	2
  
  /* IW_AUTH_80211_AUTH_ALG values (bit field) */
  #define IW_AUTH_ALG_OPEN_SYSTEM	0x00000001
  #define IW_AUTH_ALG_SHARED_KEY	0x00000002
  #define IW_AUTH_ALG_LEAP	0x00000004
  
  /* IW_AUTH_ROAMING_CONTROL values */
  #define IW_AUTH_ROAMING_ENABLE	0	/* driver/firmware based roaming */
  #define IW_AUTH_ROAMING_DISABLE	1	/* user space program used for roaming
  					 * control */
  
  /* IW_AUTH_MFP (management frame protection) values */
  #define IW_AUTH_MFP_DISABLED	0	/* MFP disabled */
  #define IW_AUTH_MFP_OPTIONAL	1	/* MFP optional */
  #define IW_AUTH_MFP_REQUIRED	2	/* MFP required */
  
  /* SIOCSIWENCODEEXT definitions */
  #define IW_ENCODE_SEQ_MAX_SIZE	8
  /* struct iw_encode_ext ->alg */
  #define IW_ENCODE_ALG_NONE	0
  #define IW_ENCODE_ALG_WEP	1
  #define IW_ENCODE_ALG_TKIP	2
  #define IW_ENCODE_ALG_CCMP	3
  #define IW_ENCODE_ALG_PMK	4
  #define IW_ENCODE_ALG_AES_CMAC	5
  /* struct iw_encode_ext ->ext_flags */
  #define IW_ENCODE_EXT_TX_SEQ_VALID	0x00000001
  #define IW_ENCODE_EXT_RX_SEQ_VALID	0x00000002
  #define IW_ENCODE_EXT_GROUP_KEY		0x00000004
  #define IW_ENCODE_EXT_SET_TX_KEY	0x00000008
  
  /* IWEVMICHAELMICFAILURE : struct iw_michaelmicfailure ->flags */
  #define IW_MICFAILURE_KEY_ID	0x00000003 /* Key ID 0..3 */
  #define IW_MICFAILURE_GROUP	0x00000004
  #define IW_MICFAILURE_PAIRWISE	0x00000008
  #define IW_MICFAILURE_STAKEY	0x00000010
  #define IW_MICFAILURE_COUNT	0x00000060 /* 1 or 2 (0 = count not supported)
  					    */
  
  /* Bit field values for enc_capa in struct iw_range */
  #define IW_ENC_CAPA_WPA		0x00000001
  #define IW_ENC_CAPA_WPA2	0x00000002
  #define IW_ENC_CAPA_CIPHER_TKIP	0x00000004
  #define IW_ENC_CAPA_CIPHER_CCMP	0x00000008
  #define IW_ENC_CAPA_4WAY_HANDSHAKE	0x00000010
  
  /* Event capability macros - in (struct iw_range *)->event_capa
   * Because we have more than 32 possible events, we use an array of
   * 32 bit bitmasks. Note : 32 bits = 0x20 = 2^5. */
  #define IW_EVENT_CAPA_BASE(cmd)		((cmd >= SIOCIWFIRSTPRIV) ? \
  					 (cmd - SIOCIWFIRSTPRIV + 0x60) : \
  					 (cmd - SIOCIWFIRST))
  #define IW_EVENT_CAPA_INDEX(cmd)	(IW_EVENT_CAPA_BASE(cmd) >> 5)
  #define IW_EVENT_CAPA_MASK(cmd)		(1 << (IW_EVENT_CAPA_BASE(cmd) & 0x1F))
  /* Event capability constants - event autogenerated by the kernel
   * This list is valid for most 802.11 devices, customise as needed... */
  #define IW_EVENT_CAPA_K_0	(IW_EVENT_CAPA_MASK(0x8B04) | \
  				 IW_EVENT_CAPA_MASK(0x8B06) | \
  				 IW_EVENT_CAPA_MASK(0x8B1A))
  #define IW_EVENT_CAPA_K_1	(IW_EVENT_CAPA_MASK(0x8B2A))
  /* "Easy" macro to set events in iw_range (less efficient) */
  #define IW_EVENT_CAPA_SET(event_capa, cmd) (event_capa[IW_EVENT_CAPA_INDEX(cmd)] |= IW_EVENT_CAPA_MASK(cmd))
  #define IW_EVENT_CAPA_SET_KERNEL(event_capa) {event_capa[0] |= IW_EVENT_CAPA_K_0; event_capa[1] |= IW_EVENT_CAPA_K_1; }
  
  
  /****************************** TYPES ******************************/
  
  /* --------------------------- SUBTYPES --------------------------- */
  /*
   *	Generic format for most parameters that fit in an int
   */
  struct	iw_param
  {
    __s32		value;		/* The value of the parameter itself */
    __u8		fixed;		/* Hardware should not use auto select */
    __u8		disabled;	/* Disable the feature */
    __u16		flags;		/* Various specifc flags (if any) */
  };
  
  /*
   *	For all data larger than 16 octets, we need to use a
   *	pointer to memory allocated in user space.
   */
  struct	iw_point
  {
    void __user	*pointer;	/* Pointer to the data  (in user space) */
    __u16		length;		/* number of fields or size in bytes */
    __u16		flags;		/* Optional params */
  };
  
  
  /*
   *	A frequency
   *	For numbers lower than 10^9, we encode the number in 'm' and
   *	set 'e' to 0
   *	For number greater than 10^9, we divide it by the lowest power
   *	of 10 to get 'm' lower than 10^9, with 'm'= f / (10^'e')...
   *	The power of 10 is in 'e', the result of the division is in 'm'.
   */
  struct	iw_freq
  {
  	__s32		m;		/* Mantissa */
  	__s16		e;		/* Exponent */
  	__u8		i;		/* List index (when in range struct) */
  	__u8		flags;		/* Flags (fixed/auto) */
  };
  
  /*
   *	Quality of the link
   */
  struct	iw_quality
  {
  	__u8		qual;		/* link quality (%retries, SNR,
  					   %missed beacons or better...) */
  	__u8		level;		/* signal level (dBm) */
  	__u8		noise;		/* noise level (dBm) */
  	__u8		updated;	/* Flags to know if updated */
  };
  
  /*
   *	Packet discarded in the wireless adapter due to
   *	"wireless" specific problems...
   *	Note : the list of counter and statistics in net_device_stats
   *	is already pretty exhaustive, and you should use that first.
   *	This is only additional stats...
   */
  struct	iw_discarded
  {
  	__u32		nwid;		/* Rx : Wrong nwid/essid */
  	__u32		code;		/* Rx : Unable to code/decode (WEP) */
  	__u32		fragment;	/* Rx : Can't perform MAC reassembly */
  	__u32		retries;	/* Tx : Max MAC retries num reached */
  	__u32		misc;		/* Others cases */
  };
  
  /*
   *	Packet/Time period missed in the wireless adapter due to
   *	"wireless" specific problems...
   */
  struct	iw_missed
  {
  	__u32		beacon;		/* Missed beacons/superframe */
  };
  
  /*
   *	Quality range (for spy threshold)
   */
  struct	iw_thrspy
  {
  	struct sockaddr		addr;		/* Source address (hw/mac) */
  	struct iw_quality	qual;		/* Quality of the link */
  	struct iw_quality	low;		/* Low threshold */
  	struct iw_quality	high;		/* High threshold */
  };
  
  /*
   *	Optional data for scan request
   *
   *	Note: these optional parameters are controlling parameters for the
   *	scanning behavior, these do not apply to getting scan results
   *	(SIOCGIWSCAN). Drivers are expected to keep a local BSS table and
   *	provide a merged results with all BSSes even if the previous scan
   *	request limited scanning to a subset, e.g., by specifying an SSID.
   *	Especially, scan results are required to include an entry for the
   *	current BSS if the driver is in Managed mode and associated with an AP.
   */
  struct	iw_scan_req
  {
  	__u8		scan_type; /* IW_SCAN_TYPE_{ACTIVE,PASSIVE} */
  	__u8		essid_len;
  	__u8		num_channels; /* num entries in channel_list;
  				       * 0 = scan all allowed channels */
  	__u8		flags; /* reserved as padding; use zero, this may
  				* be used in the future for adding flags
  				* to request different scan behavior */
  	struct sockaddr	bssid; /* ff:ff:ff:ff:ff:ff for broadcast BSSID or
  				* individual address of a specific BSS */
  
  	/*
  	 * Use this ESSID if IW_SCAN_THIS_ESSID flag is used instead of using
  	 * the current ESSID. This allows scan requests for specific ESSID
  	 * without having to change the current ESSID and potentially breaking
  	 * the current association.
  	 */
  	__u8		essid[IW_ESSID_MAX_SIZE];
  
  	/*
  	 * Optional parameters for changing the default scanning behavior.
  	 * These are based on the MLME-SCAN.request from IEEE Std 802.11.
  	 * TU is 1.024 ms. If these are set to 0, driver is expected to use
  	 * reasonable default values. min_channel_time defines the time that
  	 * will be used to wait for the first reply on each channel. If no
  	 * replies are received, next channel will be scanned after this. If
  	 * replies are received, total time waited on the channel is defined by
  	 * max_channel_time.
  	 */
  	__u32		min_channel_time; /* in TU */
  	__u32		max_channel_time; /* in TU */
  
  	struct iw_freq	channel_list[IW_MAX_FREQUENCIES];
  };
  
  /* ------------------------- WPA SUPPORT ------------------------- */
  
  /*
   *	Extended data structure for get/set encoding (this is used with
   *	SIOCSIWENCODEEXT/SIOCGIWENCODEEXT. struct iw_point and IW_ENCODE_*
   *	flags are used in the same way as with SIOCSIWENCODE/SIOCGIWENCODE and
   *	only the data contents changes (key data -> this structure, including
   *	key data).
   *
   *	If the new key is the first group key, it will be set as the default
   *	TX key. Otherwise, default TX key index is only changed if
   *	IW_ENCODE_EXT_SET_TX_KEY flag is set.
   *
   *	Key will be changed with SIOCSIWENCODEEXT in all cases except for
   *	special "change TX key index" operation which is indicated by setting
   *	key_len = 0 and ext_flags |= IW_ENCODE_EXT_SET_TX_KEY.
   *
   *	tx_seq/rx_seq are only used when respective
   *	IW_ENCODE_EXT_{TX,RX}_SEQ_VALID flag is set in ext_flags. Normal
   *	TKIP/CCMP operation is to set RX seq with SIOCSIWENCODEEXT and start
   *	TX seq from zero whenever key is changed. SIOCGIWENCODEEXT is normally
   *	used only by an Authenticator (AP or an IBSS station) to get the
   *	current TX sequence number. Using TX_SEQ_VALID for SIOCSIWENCODEEXT and
   *	RX_SEQ_VALID for SIOCGIWENCODEEXT are optional, but can be useful for
   *	debugging/testing.
   */
  struct	iw_encode_ext
  {
  	__u32		ext_flags; /* IW_ENCODE_EXT_* */
  	__u8		tx_seq[IW_ENCODE_SEQ_MAX_SIZE]; /* LSB first */
  	__u8		rx_seq[IW_ENCODE_SEQ_MAX_SIZE]; /* LSB first */
  	struct sockaddr	addr; /* ff:ff:ff:ff:ff:ff for broadcast/multicast
  			       * (group) keys or unicast address for
  			       * individual keys */
  	__u16		alg; /* IW_ENCODE_ALG_* */
  	__u16		key_len;
  	__u8		key[0];
  };
  
  /* SIOCSIWMLME data */
  struct	iw_mlme
  {
  	__u16		cmd; /* IW_MLME_* */
  	__u16		reason_code;
  	struct sockaddr	addr;
  };
  
  /* SIOCSIWPMKSA data */
  #define IW_PMKSA_ADD		1
  #define IW_PMKSA_REMOVE		2
  #define IW_PMKSA_FLUSH		3
  
  #define IW_PMKID_LEN	16
  
  struct	iw_pmksa
  {
  	__u32		cmd; /* IW_PMKSA_* */
  	struct sockaddr	bssid;
  	__u8		pmkid[IW_PMKID_LEN];
  };
  
  /* IWEVMICHAELMICFAILURE data */
  struct	iw_michaelmicfailure
  {
  	__u32		flags;
  	struct sockaddr	src_addr;
  	__u8		tsc[IW_ENCODE_SEQ_MAX_SIZE]; /* LSB first */
  };
  
  /* IWEVPMKIDCAND data */
  #define IW_PMKID_CAND_PREAUTH	0x00000001 /* RNS pre-authentication enabled */
  struct	iw_pmkid_cand
  {
  	__u32		flags; /* IW_PMKID_CAND_* */
  	__u32		index; /* the smaller the index, the higher the
  				* priority */
  	struct sockaddr	bssid;
  };
  
  /* ------------------------ WIRELESS STATS ------------------------ */
  /*
   * Wireless statistics (used for /proc/net/wireless)
   */
  struct	iw_statistics
  {
  	__u16		status;		/* Status
  					 * - device dependent for now */
  
  	struct iw_quality	qual;		/* Quality of the link
  						 * (instant/mean/max) */
  	struct iw_discarded	discard;	/* Packet discarded counts */
  	struct iw_missed	miss;		/* Packet missed counts */
  };
  
  /* ------------------------ IOCTL REQUEST ------------------------ */
  /*
   * This structure defines the payload of an ioctl, and is used 
   * below.
   *
   * Note that this structure should fit on the memory footprint
   * of iwreq (which is the same as ifreq), which mean a max size of
   * 16 octets = 128 bits. Warning, pointers might be 64 bits wide...
   * You should check this when increasing the structures defined
   * above in this file...
   */
  union	iwreq_data
  {
  	/* Config - generic */
  	char		name[IFNAMSIZ];
  	/* Name : used to verify the presence of  wireless extensions.
  	 * Name of the protocol/provider... */
  
  	struct iw_point	essid;		/* Extended network name */
  	struct iw_param	nwid;		/* network id (or domain - the cell) */
  	struct iw_freq	freq;		/* frequency or channel :
  					 * 0-1000 = channel
  					 * > 1000 = frequency in Hz */
  
  	struct iw_param	sens;		/* signal level threshold */
  	struct iw_param	bitrate;	/* default bit rate */
  	struct iw_param	txpower;	/* default transmit power */
  	struct iw_param	rts;		/* RTS threshold threshold */
  	struct iw_param	frag;		/* Fragmentation threshold */
  	__u32		mode;		/* Operation mode */
  	struct iw_param	retry;		/* Retry limits & lifetime */
  
  	struct iw_point	encoding;	/* Encoding stuff : tokens */
  	struct iw_param	power;		/* PM duration/timeout */
  	struct iw_quality qual;		/* Quality part of statistics */
  
  	struct sockaddr	ap_addr;	/* Access point address */
  	struct sockaddr	addr;		/* Destination address (hw/mac) */
  
  	struct iw_param	param;		/* Other small parameters */
  	struct iw_point	data;		/* Other large parameters */
  };
  
  /*
   * The structure to exchange data for ioctl.
   * This structure is the same as 'struct ifreq', but (re)defined for
   * convenience...
   * Do I need to remind you about structure size (32 octets) ?
   */
  struct	iwreq 
  {
  	union
  	{
  		char	ifrn_name[IFNAMSIZ];	/* if name, e.g. "eth0" */
  	} ifr_ifrn;
  
  	/* Data part (defined just above) */
  	union	iwreq_data	u;
  };
  
  /* -------------------------- IOCTL DATA -------------------------- */
  /*
   *	For those ioctl which want to exchange mode data that what could
   *	fit in the above structure...
   */
  
  /*
   *	Range of parameters
   */
  
  struct	iw_range
  {
  	/* Informative stuff (to choose between different interface) */
  	__u32		throughput;	/* To give an idea... */
  	/* In theory this value should be the maximum benchmarked
  	 * TCP/IP throughput, because with most of these devices the
  	 * bit rate is meaningless (overhead an co) to estimate how
  	 * fast the connection will go and pick the fastest one.
  	 * I suggest people to play with Netperf or any benchmark...
  	 */
  
  	/* NWID (or domain id) */
  	__u32		min_nwid;	/* Minimal NWID we are able to set */
  	__u32		max_nwid;	/* Maximal NWID we are able to set */
  
  	/* Old Frequency (backward compat - moved lower ) */
  	__u16		old_num_channels;
  	__u8		old_num_frequency;
  
  	/* Scan capabilities */
  	__u8		scan_capa; 	/* IW_SCAN_CAPA_* bit field */
  
  	/* Wireless event capability bitmasks */
  	__u32		event_capa[6];
  
  	/* signal level threshold range */
  	__s32		sensitivity;
  
  	/* Quality of link & SNR stuff */
  	/* Quality range (link, level, noise)
  	 * If the quality is absolute, it will be in the range [0 ; max_qual],
  	 * if the quality is dBm, it will be in the range [max_qual ; 0].
  	 * Don't forget that we use 8 bit arithmetics... */
  	struct iw_quality	max_qual;	/* Quality of the link */
  	/* This should contain the average/typical values of the quality
  	 * indicator. This should be the threshold between a "good" and
  	 * a "bad" link (example : monitor going from green to orange).
  	 * Currently, user space apps like quality monitors don't have any
  	 * way to calibrate the measurement. With this, they can split
  	 * the range between 0 and max_qual in different quality level
  	 * (using a geometric subdivision centered on the average).
  	 * I expect that people doing the user space apps will feedback
  	 * us on which value we need to put in each driver... */
  	struct iw_quality	avg_qual;	/* Quality of the link */
  
  	/* Rates */
  	__u8		num_bitrates;	/* Number of entries in the list */
  	__s32		bitrate[IW_MAX_BITRATES];	/* list, in bps */
  
  	/* RTS threshold */
  	__s32		min_rts;	/* Minimal RTS threshold */
  	__s32		max_rts;	/* Maximal RTS threshold */
  
  	/* Frag threshold */
  	__s32		min_frag;	/* Minimal frag threshold */
  	__s32		max_frag;	/* Maximal frag threshold */
  
  	/* Power Management duration & timeout */
  	__s32		min_pmp;	/* Minimal PM period */
  	__s32		max_pmp;	/* Maximal PM period */
  	__s32		min_pmt;	/* Minimal PM timeout */
  	__s32		max_pmt;	/* Maximal PM timeout */
  	__u16		pmp_flags;	/* How to decode max/min PM period */
  	__u16		pmt_flags;	/* How to decode max/min PM timeout */
  	__u16		pm_capa;	/* What PM options are supported */
  
  	/* Encoder stuff */
  	__u16	encoding_size[IW_MAX_ENCODING_SIZES];	/* Different token sizes */
  	__u8	num_encoding_sizes;	/* Number of entry in the list */
  	__u8	max_encoding_tokens;	/* Max number of tokens */
  	/* For drivers that need a "login/passwd" form */
  	__u8	encoding_login_index;	/* token index for login token */
  
  	/* Transmit power */
  	__u16		txpower_capa;	/* What options are supported */
  	__u8		num_txpower;	/* Number of entries in the list */
  	__s32		txpower[IW_MAX_TXPOWER];	/* list, in bps */
  
  	/* Wireless Extension version info */
  	__u8		we_version_compiled;	/* Must be WIRELESS_EXT */
  	__u8		we_version_source;	/* Last update of source */
  
  	/* Retry limits and lifetime */
  	__u16		retry_capa;	/* What retry options are supported */
  	__u16		retry_flags;	/* How to decode max/min retry limit */
  	__u16		r_time_flags;	/* How to decode max/min retry life */
  	__s32		min_retry;	/* Minimal number of retries */
  	__s32		max_retry;	/* Maximal number of retries */
  	__s32		min_r_time;	/* Minimal retry lifetime */
  	__s32		max_r_time;	/* Maximal retry lifetime */
  
  	/* Frequency */
  	__u16		num_channels;	/* Number of channels [0; num - 1] */
  	__u8		num_frequency;	/* Number of entry in the list */
  	struct iw_freq	freq[IW_MAX_FREQUENCIES];	/* list */
  	/* Note : this frequency list doesn't need to fit channel numbers,
  	 * because each entry contain its channel index */
  
  	__u32		enc_capa;	/* IW_ENC_CAPA_* bit field */
  };
  
  /*
   * Private ioctl interface information
   */
   
  struct	iw_priv_args
  {
  	__u32		cmd;		/* Number of the ioctl to issue */
  	__u16		set_args;	/* Type and number of args */
  	__u16		get_args;	/* Type and number of args */
  	char		name[IFNAMSIZ];	/* Name of the extension */
  };
  
  /* ----------------------- WIRELESS EVENTS ----------------------- */
  /*
   * Wireless events are carried through the rtnetlink socket to user
   * space. They are encapsulated in the IFLA_WIRELESS field of
   * a RTM_NEWLINK message.
   */
  
  /*
   * A Wireless Event. Contains basically the same data as the ioctl...
   */
  struct iw_event
  {
  	__u16		len;			/* Real length of this stuff */
  	__u16		cmd;			/* Wireless IOCTL */
  	union iwreq_data	u;		/* IOCTL fixed payload */
  };
  
  /* Size of the Event prefix (including padding and alignement junk) */
  #define IW_EV_LCP_LEN	(sizeof(struct iw_event) - sizeof(union iwreq_data))
  /* Size of the various events */
  #define IW_EV_CHAR_LEN	(IW_EV_LCP_LEN + IFNAMSIZ)
  #define IW_EV_UINT_LEN	(IW_EV_LCP_LEN + sizeof(__u32))
  #define IW_EV_FREQ_LEN	(IW_EV_LCP_LEN + sizeof(struct iw_freq))
  #define IW_EV_PARAM_LEN	(IW_EV_LCP_LEN + sizeof(struct iw_param))
  #define IW_EV_ADDR_LEN	(IW_EV_LCP_LEN + sizeof(struct sockaddr))
  #define IW_EV_QUAL_LEN	(IW_EV_LCP_LEN + sizeof(struct iw_quality))
  
  /* iw_point events are special. First, the payload (extra data) come at
   * the end of the event, so they are bigger than IW_EV_POINT_LEN. Second,
   * we omit the pointer, so start at an offset. */
  #define IW_EV_POINT_OFF (((char *) &(((struct iw_point *) NULL)->length)) - \
  			  (char *) NULL)
  #define IW_EV_POINT_LEN	(IW_EV_LCP_LEN + sizeof(struct iw_point) - \
  			 IW_EV_POINT_OFF)
  
  
  /* Size of the Event prefix when packed in stream */
  #define IW_EV_LCP_PK_LEN	(4)
  /* Size of the various events when packed in stream */
  #define IW_EV_CHAR_PK_LEN	(IW_EV_LCP_PK_LEN + IFNAMSIZ)
  #define IW_EV_UINT_PK_LEN	(IW_EV_LCP_PK_LEN + sizeof(__u32))
  #define IW_EV_FREQ_PK_LEN	(IW_EV_LCP_PK_LEN + sizeof(struct iw_freq))
  #define IW_EV_PARAM_PK_LEN	(IW_EV_LCP_PK_LEN + sizeof(struct iw_param))
  #define IW_EV_ADDR_PK_LEN	(IW_EV_LCP_PK_LEN + sizeof(struct sockaddr))
  #define IW_EV_QUAL_PK_LEN	(IW_EV_LCP_PK_LEN + sizeof(struct iw_quality))
  #define IW_EV_POINT_PK_LEN	(IW_EV_LCP_PK_LEN + 4)
  
  #endif /* _UAPI_LINUX_WIRELESS_H */