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/*
 * 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 _LINUX_WIRELESS_H
#define _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 *****************************/

/* This header is used in user-space, therefore need to be sanitised
 * for that purpose. Those includes are usually not compatible with glibc.
 * To know which includes to use in user-space, check iwlib.h. */
#ifdef __KERNEL__
#include <linux/types.h>		/* for "caddr_t" et al		*/
#include <linux/socket.h>		/* for "struct sockaddr" et al	*/
#include <linux/if.h>			/* for IFNAMSIZ and co... */
#endif	/* __KERNEL__ */

/***************************** 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"...