wireless.h

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/*
 * This file define a set of standard wireless extensions
 *
 * Version :    22  16.3.07
 *
 * Authors :    Jean Tourrilhes - HPL - <[email protected]>
 * 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 <[email protected]>)
 * ----------
 *  - 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 */