include/linux/wireless.h

   1 /*
   2  * This file define a set of standard wireless extensions
   3  *
   4  * Version :    21      14.3.06
   5  *
   6  * Authors :    Jean Tourrilhes - HPL - <jt@hpl.hp.com>
   7  * Copyright (c) 1997-2006 Jean Tourrilhes, All Rights Reserved.
   8  */
   9
  10 #ifndef _LINUX_WIRELESS_H
  11 #define _LINUX_WIRELESS_H
  12
  13 /************************** DOCUMENTATION **************************/
  14 /*
  15  * Initial APIs (1996 -> onward) :
  16  * -----------------------------
  17  * Basically, the wireless extensions are for now a set of standard ioctl
  18  * call + /proc/net/wireless
  19  *
  20  * The entry /proc/net/wireless give statistics and information on the
  21  * driver.
  22  * This is better than having each driver having its entry because
  23  * its centralised and we may remove the driver module safely.
  24  *
  25  * Ioctl are used to configure the driver and issue commands.  This is
  26  * better than command line options of insmod because we may want to
  27  * change dynamically (while the driver is running) some parameters.
  28  *
  29  * The ioctl mechanimsm are copied from standard devices ioctl.
  30  * We have the list of command plus a structure descibing the
  31  * data exchanged...
  32  * Note that to add these ioctl, I was obliged to modify :
  33  *      # net/core/dev.c (two place + add include)
  34  *      # net/ipv4/af_inet.c (one place + add include)
  35  *
  36  * /proc/net/wireless is a copy of /proc/net/dev.
  37  * We have a structure for data passed from the driver to /proc/net/wireless
  38  * Too add this, I've modified :
  39  *      # net/core/dev.c (two other places)
  40  *      # include/linux/netdevice.h (one place)
  41  *      # include/linux/proc_fs.h (one place)
  42  *
  43  * New driver API (2002 -> onward) :
  44  * -------------------------------
  45  * This file is only concerned with the user space API and common definitions.
  46  * The new driver API is defined and documented in :
  47  *      # include/net/iw_handler.h
  48  *
  49  * Note as well that /proc/net/wireless implementation has now moved in :
  50  *      # net/core/wireless.c
  51  *
  52  * Wireless Events (2002 -> onward) :
  53  * --------------------------------
  54  * Events are defined at the end of this file, and implemented in :
  55  *      # net/core/wireless.c
  56  *
  57  * Other comments :
  58  * --------------
  59  * Do not add here things that are redundant with other mechanisms
  60  * (drivers init, ifconfig, /proc/net/dev, ...) and with are not
  61  * wireless specific.
  62  *
  63  * These wireless extensions are not magic : each driver has to provide
  64  * support for them...
  65  *
  66  * IMPORTANT NOTE : As everything in the kernel, this is very much a
  67  * work in progress. Contact me if you have ideas of improvements...
  68  */
  69
  70 /***************************** INCLUDES *****************************/
  71
  72 /* This header is used in user-space, therefore need to be sanitised
  73  * for that purpose. Those includes are usually not compatible with glibc.
  74  * To know which includes to use in user-space, check iwlib.h. */
  75 #ifdef __KERNEL__
  76 #include <linux/types.h>                /* for "caddr_t" et al          */
  77 #include <linux/socket.h>               /* for "struct sockaddr" et al  */
  78 #include <linux/if.h>                   /* for IFNAMSIZ and co... */
  79 #endif  /* __KERNEL__ */
  80
  81 /***************************** VERSION *****************************/
  82 /*
  83  * This constant is used to know the availability of the wireless
  84  * extensions and to know which version of wireless extensions it is
  85  * (there is some stuff that will be added in the future...)
  86  * I just plan to increment with each new version.
  87  */
  88 #define WIRELESS_EXT    21
  89
  90 /*
  91  * Changes :
  92  *
  93  * V2 to V3
  94  * --------
  95  *      Alan Cox start some incompatibles changes. I've integrated a bit more.
  96  *      - Encryption renamed to Encode to avoid US regulation problems
  97  *      - Frequency changed from float to struct to avoid problems on old 386
  98  *
  99  * V3 to V4
 100  * --------
 101  *      - Add sensitivity
 102  *
 103  * V4 to V5
 104  * --------
 105  *      - Missing encoding definitions in range
 106  *      - Access points stuff
 107  *
 108  * V5 to V6
 109  * --------
 110  *      - 802.11 support (ESSID ioctls)
 111  *
 112  * V6 to V7
 113  * --------
 114  *      - define IW_ESSID_MAX_SIZE and IW_MAX_AP
 115  *
 116  * V7 to V8
 117  * --------
 118  *      - Changed my e-mail address
 119  *      - More 802.11 support (nickname, rate, rts, frag)
 120  *      - List index in frequencies
 121  *
 122  * V8 to V9
 123  * --------
 124  *      - Support for 'mode of operation' (ad-hoc, managed...)
 125  *      - Support for unicast and multicast power saving
 126  *      - Change encoding to support larger tokens (>64 bits)
 127  *      - Updated iw_params (disable, flags) and use it for NWID
 128  *      - Extracted iw_point from iwreq for clarity
 129  *
 130  * V9 to V10
 131  * ---------
 132  *      - Add PM capability to range structure
 133  *      - Add PM modifier : MAX/MIN/RELATIVE
 134  *      - Add encoding option : IW_ENCODE_NOKEY
 135  *      - Add TxPower ioctls (work like TxRate)
 136  *
 137  * V10 to V11
 138  * ----------
 139  *      - Add WE version in range (help backward/forward compatibility)
 140  *      - Add retry ioctls (work like PM)
 141  *
 142  * V11 to V12
 143  * ----------
 144  *      - Add SIOCSIWSTATS to get /proc/net/wireless programatically
 145  *      - Add DEV PRIVATE IOCTL to avoid collisions in SIOCDEVPRIVATE space
 146  *      - Add new statistics (frag, retry, beacon)
 147  *      - Add average quality (for user space calibration)
 148  *
 149  * V12 to V13
 150  * ----------
 151  *      - Document creation of new driver API.
 152  *      - Extract union iwreq_data from struct iwreq (for new driver API).
 153  *      - Rename SIOCSIWNAME as SIOCSIWCOMMIT
 154  *
 155  * V13 to V14
 156  * ----------
 157  *      - Wireless Events support : define struct iw_event
 158  *      - Define additional specific event numbers
 159  *      - Add "addr" and "param" fields in union iwreq_data
 160  *      - AP scanning stuff (SIOCSIWSCAN and friends)
 161  *
 162  * V14 to V15
 163  * ----------
 164  *      - Add IW_PRIV_TYPE_ADDR for struct sockaddr private arg
 165  *      - Make struct iw_freq signed (both m & e), add explicit padding
 166  *      - Add IWEVCUSTOM for driver specific event/scanning token
 167  *      - Add IW_MAX_GET_SPY for driver returning a lot of addresses
 168  *      - Add IW_TXPOW_RANGE for range of Tx Powers
 169  *      - Add IWEVREGISTERED & IWEVEXPIRED events for Access Points
 170  *      - Add IW_MODE_MONITOR for passive monitor
 171  *
 172  * V15 to V16
 173  * ----------
 174  *      - Increase the number of bitrates in iw_range to 32 (for 802.11g)
 175  *      - Increase the number of frequencies in iw_range to 32 (for 802.11b+a)
 176  *      - Reshuffle struct iw_range for increases, add filler
 177  *      - Increase IW_MAX_AP to 64 for driver returning a lot of addresses
 178  *      - Remove IW_MAX_GET_SPY because conflict with enhanced spy support
 179  *      - Add SIOCSIWTHRSPY/SIOCGIWTHRSPY and "struct iw_thrspy"
 180  *      - Add IW_ENCODE_TEMP and iw_range->encoding_login_index
 181  *
 182  * V16 to V17
 183  * ----------
 184  *      - Add flags to frequency -> auto/fixed
 185  *      - Document (struct iw_quality *)->updated, add new flags (INVALID)
 186  *      - Wireless Event capability in struct iw_range
 187  *      - Add support for relative TxPower (yick !)
 188  *
 189  * V17 to V18 (From Jouni Malinen <jkmaline@cc.hut.fi>)
 190  * ----------
 191  *      - Add support for WPA/WPA2
 192  *      - Add extended encoding configuration (SIOCSIWENCODEEXT and
 193  *        SIOCGIWENCODEEXT)
 194  *      - Add SIOCSIWGENIE/SIOCGIWGENIE
 195  *      - Add SIOCSIWMLME
 196  *      - Add SIOCSIWPMKSA
 197  *      - Add struct iw_range bit field for supported encoding capabilities
 198  *      - Add optional scan request parameters for SIOCSIWSCAN
 199  *      - Add SIOCSIWAUTH/SIOCGIWAUTH for setting authentication and WPA
 200  *        related parameters (extensible up to 4096 parameter values)
 201  *      - Add wireless events: IWEVGENIE, IWEVMICHAELMICFAILURE,
 202  *        IWEVASSOCREQIE, IWEVASSOCRESPIE, IWEVPMKIDCAND
 203  *
 204  * V18 to V19
 205  * ----------
 206  *      - Remove (struct iw_point *)->pointer from events and streams
 207  *      - Remove header includes to help user space
 208  *      - Increase IW_ENCODING_TOKEN_MAX from 32 to 64
 209  *      - Add IW_QUAL_ALL_UPDATED and IW_QUAL_ALL_INVALID macros
 210  *      - Add explicit flag to tell stats are in dBm : IW_QUAL_DBM
 211  *      - Add IW_IOCTL_IDX() and IW_EVENT_IDX() macros
 212  *
 213  * V19 to V20
 214  * ----------
 215  *      - RtNetlink requests support (SET/GET)
 216  *
 217  * V20 to V21
 218  * ----------
 219  *      - Remove (struct net_device *)->get_wireless_stats()
 220  *      - Change length in ESSID and NICK to strlen() instead of strlen()+1
 221  *      - Add IW_RETRY_SHORT/IW_RETRY_LONG retry modifiers
 222  *      - Power/Retry relative values no longer * 100000
 223  *      - Add explicit flag to tell stats are in 802.11k RCPI : IW_QUAL_RCPI
 224  */
 225
 226 /**************************** CONSTANTS ****************************/
 227
 228 /* -------------------------- IOCTL LIST -------------------------- */
 229
 230 /* Wireless Identification */
 231 #define SIOCSIWCOMMIT   0x8B00          /* Commit pending changes to driver */
 232 #define SIOCGIWNAME     0x8B01          /* get name == wireless protocol */
 233 /* SIOCGIWNAME is used to verify the presence of Wireless Extensions.
 234  * Common values : "IEEE 802.11-DS", "IEEE 802.11-FH", "IEEE 802.11b"...
 235  * Don't put the name of your driver there, it's useless. */
 236
 237 /* Basic operations */
 238 #define SIOCSIWNWID     0x8B02          /* set network id (pre-802.11) */
 239 #define SIOCGIWNWID     0x8B03          /* get network id (the cell) */
 240 #define SIOCSIWFREQ     0x8B04          /* set channel/frequency (Hz) */
 241 #define SIOCGIWFREQ     0x8B05          /* get channel/frequency (Hz) */
 242 #define SIOCSIWMODE     0x8B06          /* set operation mode */
 243 #define SIOCGIWMODE     0x8B07          /* get operation mode */
 244 #define SIOCSIWSENS     0x8B08          /* set sensitivity (dBm) */
 245 #define SIOCGIWSENS     0x8B09          /* get sensitivity (dBm) */
 246
 247 /* Informative stuff */
 248 #define SIOCSIWRANGE    0x8B0A          /* Unused */
 249 #define SIOCGIWRANGE    0x8B0B          /* Get range of parameters */
 250 #define SIOCSIWPRIV     0x8B0C          /* Unused */
 251 #define SIOCGIWPRIV     0x8B0D          /* get private ioctl interface info */
 252 #define SIOCSIWSTATS    0x8B0E          /* Unused */
 253 #define SIOCGIWSTATS    0x8B0F          /* Get /proc/net/wireless stats */
 254 /* SIOCGIWSTATS is strictly used between user space and the kernel, and
 255  * is never passed to the driver (i.e. the driver will never see it). */
 256
 257 /* Spy support (statistics per MAC address - used for Mobile IP support) */
 258 #define SIOCSIWSPY      0x8B10          /* set spy addresses */
 259 #define SIOCGIWSPY      0x8B11          /* get spy info (quality of link) */
 260 #define SIOCSIWTHRSPY   0x8B12          /* set spy threshold (spy event) */
 261 #define SIOCGIWTHRSPY   0x8B13          /* get spy threshold */
 262
 263 /* Access Point manipulation */
 264 #define SIOCSIWAP       0x8B14          /* set access point MAC addresses */
 265 #define SIOCGIWAP       0x8B15          /* get access point MAC addresses */
 266 #define SIOCGIWAPLIST   0x8B17          /* Deprecated in favor of scanning */
 267 #define SIOCSIWSCAN     0x8B18          /* trigger scanning (list cells) */
 268 #define SIOCGIWSCAN     0x8B19          /* get scanning results */
 269
 270 /* 802.11 specific support */
 271 #define SIOCSIWESSID    0x8B1A          /* set ESSID (network name) */
 272 #define SIOCGIWESSID    0x8B1B          /* get ESSID */
 273 #define SIOCSIWNICKN    0x8B1C          /* set node name/nickname */
 274 #define SIOCGIWNICKN    0x8B1D          /* get node name/nickname */
 275 /* As the ESSID and NICKN are strings up to 32 bytes long, it doesn't fit
 276  * within the 'iwreq' structure, so we need to use the 'data' member to
 277  * point to a string in user space, like it is done for RANGE... */
 278
 279 /* Other parameters useful in 802.11 and some other devices */
 280 #define SIOCSIWRATE     0x8B20          /* set default bit rate (bps) */
 281 #define SIOCGIWRATE     0x8B21          /* get default bit rate (bps) */
 282 #define SIOCSIWRTS      0x8B22          /* set RTS/CTS threshold (bytes) */
 283 #define SIOCGIWRTS      0x8B23          /* get RTS/CTS threshold (bytes) */
 284 #define SIOCSIWFRAG     0x8B24          /* set fragmentation thr (bytes) */
 285 #define SIOCGIWFRAG     0x8B25          /* get fragmentation thr (bytes) */
 286 #define SIOCSIWTXPOW    0x8B26          /* set transmit power (dBm) */
 287 #define SIOCGIWTXPOW    0x8B27          /* get transmit power (dBm) */
 288 #define SIOCSIWRETRY    0x8B28          /* set retry limits and lifetime */
 289 #define SIOCGIWRETRY    0x8B29          /* get retry limits and lifetime */
 290
 291 /* Encoding stuff (scrambling, hardware security, WEP...) */
 292 #define SIOCSIWENCODE   0x8B2A          /* set encoding token & mode */
 293 #define SIOCGIWENCODE   0x8B2B          /* get encoding token & mode */
 294 /* Power saving stuff (power management, unicast and multicast) */
 295 #define SIOCSIWPOWER    0x8B2C          /* set Power Management settings */
 296 #define SIOCGIWPOWER    0x8B2D          /* get Power Management settings */
 297
 298 /* WPA : Generic IEEE 802.11 informatiom element (e.g., for WPA/RSN/WMM).
 299  * This ioctl uses struct iw_point and data buffer that includes IE id and len
 300  * fields. More than one IE may be included in the request. Setting the generic
 301  * IE to empty buffer (len=0) removes the generic IE from the driver. Drivers
 302  * are allowed to generate their own WPA/RSN IEs, but in these cases, drivers
 303  * are required to report the used IE as a wireless event, e.g., when
 304  * associating with an AP. */
 305 #define SIOCSIWGENIE    0x8B30          /* set generic IE */
 306 #define SIOCGIWGENIE    0x8B31          /* get generic IE */
 307
 308 /* WPA : IEEE 802.11 MLME requests */
 309 #define SIOCSIWMLME     0x8B16          /* request MLME operation; uses
 310                                          * struct iw_mlme */
 311 /* WPA : Authentication mode parameters */
 312 #define SIOCSIWAUTH     0x8B32          /* set authentication mode params */
 313 #define SIOCGIWAUTH     0x8B33          /* get authentication mode params */
 314
 315 /* WPA : Extended version of encoding configuration */
 316 #define SIOCSIWENCODEEXT 0x8B34         /* set encoding token & mode */
 317 #define SIOCGIWENCODEEXT 0x8B35         /* get encoding token & mode */
 318
 319 /* WPA2 : PMKSA cache management */
 320 #define SIOCSIWPMKSA    0x8B36          /* PMKSA cache operation */
 321
 322 /* -------------------- DEV PRIVATE IOCTL LIST -------------------- */
 323
 324 /* These 32 ioctl are wireless device private, for 16 commands.
 325  * Each driver is free to use them for whatever purpose it chooses,
 326  * however the driver *must* export the description of those ioctls
 327  * with SIOCGIWPRIV and *must* use arguments as defined below.
 328  * If you don't follow those rules, DaveM is going to hate you (reason :
 329  * it make mixed 32/64bit operation impossible).
 330  */
 331 #define SIOCIWFIRSTPRIV 0x8BE0
 332 #define SIOCIWLASTPRIV  0x8BFF
 333 /* Previously, we were using SIOCDEVPRIVATE, but we now have our
 334  * separate range because of collisions with other tools such as
 335  * 'mii-tool'.
 336  * We now have 32 commands, so a bit more space ;-).
 337  * Also, all 'even' commands are only usable by root and don't return the
 338  * content of ifr/iwr to user (but you are not obliged to use the set/get
 339  * convention, just use every other two command). More details in iwpriv.c.
 340  * And I repeat : you are not forced to use them with iwpriv, but you
 341  * must be compliant with it.
 342  */
 343
 344 /* ------------------------- IOCTL STUFF ------------------------- */
 345
 346 /* The first and the last (range) */
 347 #define SIOCIWFIRST     0x8B00
 348 #define SIOCIWLAST      SIOCIWLASTPRIV          /* 0x8BFF */
 349 #define IW_IOCTL_IDX(cmd)       ((cmd) - SIOCIWFIRST)
 350
 351 /* Odd : get (world access), even : set (root access) */
 352 #define IW_IS_SET(cmd)  (!((cmd) & 0x1))
 353 #define IW_IS_GET(cmd)  ((cmd) & 0x1)
 354
 355 /* ----------------------- WIRELESS EVENTS ----------------------- */
 356 /* Those are *NOT* ioctls, do not issue request on them !!! */
 357 /* Most events use the same identifier as ioctl requests */
 358
 359 #define IWEVTXDROP      0x8C00          /* Packet dropped to excessive retry */
 360 #define IWEVQUAL        0x8C01          /* Quality part of statistics (scan) */
 361 #define IWEVCUSTOM      0x8C02          /* Driver specific ascii string */
 362 #define IWEVREGISTERED  0x8C03          /* Discovered a new node (AP mode) */
 363 #define IWEVEXPIRED     0x8C04          /* Expired a node (AP mode) */
 364 #define IWEVGENIE       0x8C05          /* Generic IE (WPA, RSN, WMM, ..)
 365                                          * (scan results); This includes id and
 366                                          * length fields. One IWEVGENIE may
 367                                          * contain more than one IE. Scan
 368                                          * results may contain one or more
 369                                          * IWEVGENIE events. */
 370 #define IWEVMICHAELMICFAILURE 0x8C06    /* Michael MIC failure
 371                                          * (struct iw_michaelmicfailure)
 372                                          */
 373 #define IWEVASSOCREQIE  0x8C07          /* IEs used in (Re)Association Request.
 374                                          * The data includes id and length
 375                                          * fields and may contain more than one
 376                                          * IE. This event is required in
 377                                          * Managed mode if the driver
 378                                          * generates its own WPA/RSN IE. This
 379                                          * should be sent just before
 380                                          * IWEVREGISTERED event for the
 381                                          * association. */
 382 #define IWEVASSOCRESPIE 0x8C08          /* IEs used in (Re)Association
 383                                          * Response. The data includes id and
 384                                          * length fields and may contain more
 385                                          * than one IE. This may be sent
 386                                          * between IWEVASSOCREQIE and
 387                                          * IWEVREGISTERED events for the
 388                                          * association. */
 389 #define IWEVPMKIDCAND   0x8C09          /* PMKID candidate for RSN
 390                                          * pre-authentication
 391                                          * (struct iw_pmkid_cand) */
 392
 393 #define IWEVFIRST       0x8C00
 394 #define IW_EVENT_IDX(cmd)       ((cmd) - IWEVFIRST)
 395
 396 /* ------------------------- PRIVATE INFO ------------------------- */
 397 /*
 398  * The following is used with SIOCGIWPRIV. It allow a driver to define
 399  * the interface (name, type of data) for its private ioctl.
 400  * Privates ioctl are SIOCIWFIRSTPRIV -> SIOCIWLASTPRIV
 401  */
 402
 403 #define IW_PRIV_TYPE_MASK       0x7000  /* Type of arguments */
 404 #define IW_PRIV_TYPE_NONE       0x0000
 405 #define IW_PRIV_TYPE_BYTE       0x1000  /* Char as number */
 406 #define IW_PRIV_TYPE_CHAR       0x2000  /* Char as character */
 407 #define IW_PRIV_TYPE_INT        0x4000  /* 32 bits int */
 408 #define IW_PRIV_TYPE_FLOAT      0x5000  /* struct iw_freq */
 409 #define IW_PRIV_TYPE_ADDR       0x6000  /* struct sockaddr */
 410
 411 #define IW_PRIV_SIZE_FIXED      0x0800  /* Variable or fixed number of args */
 412
 413 #define IW_PRIV_SIZE_MASK       0x07FF  /* Max number of those args */
 414
 415 /*
 416  * Note : if the number of args is fixed and the size < 16 octets,
 417  * instead of passing a pointer we will put args in the iwreq struct...
 418  */
 419
 420 /* ----------------------- OTHER CONSTANTS ----------------------- */
 421
 422 /* Maximum frequencies in the range struct */
 423 #define IW_MAX_FREQUENCIES      32
 424 /* Note : if you have something like 80 frequencies,
 425  * don't increase this constant and don't fill the frequency list.
 426  * The user will be able to set by channel anyway... */
 427
 428 /* Maximum bit rates in the range struct */
 429 #define IW_MAX_BITRATES         32
 430
 431 /* Maximum tx powers in the range struct */
 432 #define IW_MAX_TXPOWER          8
 433 /* Note : if you more than 8 TXPowers, just set the max and min or
 434  * a few of them in the struct iw_range. */
 435
 436 /* Maximum of address that you may set with SPY */
 437 #define IW_MAX_SPY              8
 438
 439 /* Maximum of address that you may get in the
 440    list of access points in range */
 441 #define IW_MAX_AP               64
 442
 443 /* Maximum size of the ESSID and NICKN strings */
 444 #define IW_ESSID_MAX_SIZE       32
 445
 446 /* Modes of operation */
 447 #define IW_MODE_AUTO    0       /* Let the driver decides */
 448 #define IW_MODE_ADHOC   1       /* Single cell network */
 449 #define IW_MODE_INFRA   2       /* Multi cell network, roaming, ... */
 450 #define IW_MODE_MASTER  3       /* Synchronisation master or Access Point */
 451 #define IW_MODE_REPEAT  4       /* Wireless Repeater (forwarder) */
 452 #define IW_MODE_SECOND  5       /* Secondary master/repeater (backup) */
 453 #define IW_MODE_MONITOR 6       /* Passive monitor (listen only) */
 454
 455 /* Statistics flags (bitmask in updated) */
 456 #define IW_QUAL_QUAL_UPDATED    0x01    /* Value was updated since last read */
 457 #define IW_QUAL_LEVEL_UPDATED   0x02
 458 #define IW_QUAL_NOISE_UPDATED   0x04
 459 #define IW_QUAL_ALL_UPDATED     0x07
 460 #define IW_QUAL_DBM             0x08    /* Level + Noise are dBm */
 461 #define IW_QUAL_QUAL_INVALID    0x10    /* Driver doesn't provide value */
 462 #define IW_QUAL_LEVEL_INVALID   0x20
 463 #define IW_QUAL_NOISE_INVALID   0x40
 464 #define IW_QUAL_RCPI            0x80    /* Level + Noise are 802.11k RCPI */
 465 #define IW_QUAL_ALL_INVALID     0x70
 466
 467 /* Frequency flags */
 468 #define IW_FREQ_AUTO            0x00    /* Let the driver decides */
 469 #define IW_FREQ_FIXED           0x01    /* Force a specific value */
 470
 471 /* Maximum number of size of encoding token available
 472  * they are listed in the range structure */
 473 #define IW_MAX_ENCODING_SIZES   8
 474
 475 /* Maximum size of the encoding token in bytes */
 476 #define IW_ENCODING_TOKEN_MAX   64      /* 512 bits (for now) */
 477
 478 /* Flags for encoding (along with the token) */
 479 #define IW_ENCODE_INDEX         0x00FF  /* Token index (if needed) */
 480 #define IW_ENCODE_FLAGS         0xFF00  /* Flags defined below */
 481 #define IW_ENCODE_MODE          0xF000  /* Modes defined below */
 482 #define IW_ENCODE_DISABLED      0x8000  /* Encoding disabled */
 483 #define IW_ENCODE_ENABLED       0x0000  /* Encoding enabled */
 484 #define IW_ENCODE_RESTRICTED    0x4000  /* Refuse non-encoded packets */
 485 #define IW_ENCODE_OPEN          0x2000  /* Accept non-encoded packets */
 486 #define IW_ENCODE_NOKEY         0x0800  /* Key is write only, so not present */
 487 #define IW_ENCODE_TEMP          0x0400  /* Temporary key */
 488
 489 /* Power management flags available (along with the value, if any) */
 490 #define IW_POWER_ON             0x0000  /* No details... */
 491 #define IW_POWER_TYPE           0xF000  /* Type of parameter */
 492 #define IW_POWER_PERIOD         0x1000  /* Value is a period/duration of  */
 493 #define IW_POWER_TIMEOUT        0x2000  /* Value is a timeout (to go asleep) */
 494 #define IW_POWER_MODE           0x0F00  /* Power Management mode */
 495 #define IW_POWER_UNICAST_R      0x0100  /* Receive only unicast messages */
 496 #define IW_POWER_MULTICAST_R    0x0200  /* Receive only multicast messages */
 497 #define IW_POWER_ALL_R          0x0300  /* Receive all messages though PM */
 498 #define IW_POWER_FORCE_S        0x0400  /* Force PM procedure for sending unicast */
 499 #define IW_POWER_REPEATER       0x0800  /* Repeat broadcast messages in PM period */
 500 #define IW_POWER_MODIFIER       0x000F  /* Modify a parameter */
 501 #define IW_POWER_MIN            0x0001  /* Value is a minimum  */
 502 #define IW_POWER_MAX            0x0002  /* Value is a maximum */
 503 #define IW_POWER_RELATIVE       0x0004  /* Value is not in seconds/ms/us */
 504
 505 /* Transmit Power flags available */
 506 #define IW_TXPOW_TYPE           0x00FF  /* Type of value */
 507 #define IW_TXPOW_DBM            0x0000  /* Value is in dBm */
 508 #define IW_TXPOW_MWATT          0x0001  /* Value is in mW */
 509 #define IW_TXPOW_RELATIVE       0x0002  /* Value is in arbitrary units */
 510 #define IW_TXPOW_RANGE          0x1000  /* Range of value between min/max */
 511
 512 /* Retry limits and lifetime flags available */
 513 #define IW_RETRY_ON             0x0000  /* No details... */
 514 #define IW_RETRY_TYPE           0xF000  /* Type of parameter */
 515 #define IW_RETRY_LIMIT          0x1000  /* Maximum number of retries*/
 516 #define IW_RETRY_LIFETIME       0x2000  /* Maximum duration of retries in us */
 517 #define IW_RETRY_MODIFIER       0x00FF  /* Modify a parameter */
 518 #define IW_RETRY_MIN            0x0001  /* Value is a minimum  */
 519 #define IW_RETRY_MAX            0x0002  /* Value is a maximum */
 520 #define IW_RETRY_RELATIVE       0x0004  /* Value is not in seconds/ms/us */
 521 #define IW_RETRY_SHORT          0x0010  /* Value is for short packets  */
 522 #define IW_RETRY_LONG           0x0020  /* Value is for long packets */
 523
 524 /* Scanning request flags */
 525 #define IW_SCAN_DEFAULT         0x0000  /* Default scan of the driver */
 526 #define IW_SCAN_ALL_ESSID       0x0001  /* Scan all ESSIDs */
 527 #define IW_SCAN_THIS_ESSID      0x0002  /* Scan only this ESSID */
 528 #define IW_SCAN_ALL_FREQ        0x0004  /* Scan all Frequencies */
 529 #define IW_SCAN_THIS_FREQ       0x0008  /* Scan only this Frequency */
 530 #define IW_SCAN_ALL_MODE        0x0010  /* Scan all Modes */
 531 #define IW_SCAN_THIS_MODE       0x0020  /* Scan only this Mode */
 532 #define IW_SCAN_ALL_RATE        0x0040  /* Scan all Bit-Rates */
 533 #define IW_SCAN_THIS_RATE       0x0080  /* Scan only this Bit-Rate */
 534 /* struct iw_scan_req scan_type */
 535 #define IW_SCAN_TYPE_ACTIVE 0
 536 #define IW_SCAN_TYPE_PASSIVE 1
 537 /* Maximum size of returned data */
 538 #define IW_SCAN_MAX_DATA        4096    /* In bytes */
 539
 540 /* Max number of char in custom event - use multiple of them if needed */
 541 #define IW_CUSTOM_MAX           256     /* In bytes */
 542
 543 /* Generic information element */
 544 #define IW_GENERIC_IE_MAX       1024
 545
 546 /* MLME requests (SIOCSIWMLME / struct iw_mlme) */
 547 #define IW_MLME_DEAUTH          0
 548 #define IW_MLME_DISASSOC        1
 549 #define IW_MLME_AUTH            2
 550 #define IW_MLME_ASSOC           3
 551
 552 /* SIOCSIWAUTH/SIOCGIWAUTH struct iw_param flags */
 553 #define IW_AUTH_INDEX           0x0FFF
 554 #define IW_AUTH_FLAGS           0xF000
 555 /* SIOCSIWAUTH/SIOCGIWAUTH parameters (0 .. 4095)
 556  * (IW_AUTH_INDEX mask in struct iw_param flags; this is the index of the
 557  * parameter that is being set/get to; value will be read/written to
 558  * struct iw_param value field) */
 559 #define IW_AUTH_WPA_VERSION             0
 560 #define IW_AUTH_CIPHER_PAIRWISE         1
 561 #define IW_AUTH_CIPHER_GROUP            2
 562 #define IW_AUTH_KEY_MGMT                3
 563 #define IW_AUTH_TKIP_COUNTERMEASURES    4
 564 #define IW_AUTH_DROP_UNENCRYPTED        5
 565 #define IW_AUTH_80211_AUTH_ALG          6
 566 #define IW_AUTH_WPA_ENABLED             7
 567 #define IW_AUTH_RX_UNENCRYPTED_EAPOL    8
 568 #define IW_AUTH_ROAMING_CONTROL         9
 569 #define IW_AUTH_PRIVACY_INVOKED         10
 570
 571 /* IW_AUTH_WPA_VERSION values (bit field) */
 572 #define IW_AUTH_WPA_VERSION_DISABLED    0x00000001
 573 #define IW_AUTH_WPA_VERSION_WPA         0x00000002
 574 #define IW_AUTH_WPA_VERSION_WPA2        0x00000004
 575
 576 /* IW_AUTH_PAIRWISE_CIPHER and IW_AUTH_GROUP_CIPHER values (bit field) */
 577 #define IW_AUTH_CIPHER_NONE     0x00000001
 578 #define IW_AUTH_CIPHER_WEP40    0x00000002
 579 #define IW_AUTH_CIPHER_TKIP     0x00000004
 580 #define IW_AUTH_CIPHER_CCMP     0x00000008
 581 #define IW_AUTH_CIPHER_WEP104   0x00000010
 582
 583 /* IW_AUTH_KEY_MGMT values (bit field) */
 584 #define IW_AUTH_KEY_MGMT_802_1X 1
 585 #define IW_AUTH_KEY_MGMT_PSK    2
 586
 587 /* IW_AUTH_80211_AUTH_ALG values (bit field) */
 588 #define IW_AUTH_ALG_OPEN_SYSTEM 0x00000001
 589 #define IW_AUTH_ALG_SHARED_KEY  0x00000002
 590 #define IW_AUTH_ALG_LEAP        0x00000004
 591
 592 /* IW_AUTH_ROAMING_CONTROL values */
 593 #define IW_AUTH_ROAMING_ENABLE  0       /* driver/firmware based roaming */
 594 #define IW_AUTH_ROAMING_DISABLE 1       /* user space program used for roaming
 595                                          * control */
 596
 597 /* SIOCSIWENCODEEXT definitions */
 598 #define IW_ENCODE_SEQ_MAX_SIZE  8
 599 /* struct iw_encode_ext ->alg */
 600 #define IW_ENCODE_ALG_NONE      0
 601 #define IW_ENCODE_ALG_WEP       1
 602 #define IW_ENCODE_ALG_TKIP      2
 603 #define IW_ENCODE_ALG_CCMP      3
 604 /* struct iw_encode_ext ->ext_flags */
 605 #define IW_ENCODE_EXT_TX_SEQ_VALID      0x00000001
 606 #define IW_ENCODE_EXT_RX_SEQ_VALID      0x00000002
 607 #define IW_ENCODE_EXT_GROUP_KEY         0x00000004
 608 #define IW_ENCODE_EXT_SET_TX_KEY        0x00000008
 609
 610 /* IWEVMICHAELMICFAILURE : struct iw_michaelmicfailure ->flags */
 611 #define IW_MICFAILURE_KEY_ID    0x00000003 /* Key ID 0..3 */
 612 #define IW_MICFAILURE_GROUP     0x00000004
 613 #define IW_MICFAILURE_PAIRWISE  0x00000008
 614 #define IW_MICFAILURE_STAKEY    0x00000010
 615 #define IW_MICFAILURE_COUNT     0x00000060 /* 1 or 2 (0 = count not supported)
 616                                             */
 617
 618 /* Bit field values for enc_capa in struct iw_range */
 619 #define IW_ENC_CAPA_WPA         0x00000001
 620 #define IW_ENC_CAPA_WPA2        0x00000002
 621 #define IW_ENC_CAPA_CIPHER_TKIP 0x00000004
 622 #define IW_ENC_CAPA_CIPHER_CCMP 0x00000008
 623
 624 /* Event capability macros - in (struct iw_range *)->event_capa
 625  * Because we have more than 32 possible events, we use an array of
 626  * 32 bit bitmasks. Note : 32 bits = 0x20 = 2^5. */
 627 #define IW_EVENT_CAPA_BASE(cmd)         ((cmd >= SIOCIWFIRSTPRIV) ? \
 628                                          (cmd - SIOCIWFIRSTPRIV + 0x60) : \
 629                                          (cmd - SIOCSIWCOMMIT))
 630 #define IW_EVENT_CAPA_INDEX(cmd)        (IW_EVENT_CAPA_BASE(cmd) >> 5)
 631 #define IW_EVENT_CAPA_MASK(cmd)         (1 << (IW_EVENT_CAPA_BASE(cmd) & 0x1F))
 632 /* Event capability constants - event autogenerated by the kernel
 633  * This list is valid for most 802.11 devices, customise as needed... */
 634 #define IW_EVENT_CAPA_K_0       (IW_EVENT_CAPA_MASK(0x8B04) | \
 635                                  IW_EVENT_CAPA_MASK(0x8B06) | \
 636                                  IW_EVENT_CAPA_MASK(0x8B1A))
 637 #define IW_EVENT_CAPA_K_1       (IW_EVENT_CAPA_MASK(0x8B2A))
 638 /* "Easy" macro to set events in iw_range (less efficient) */
 639 #define IW_EVENT_CAPA_SET(event_capa, cmd) (event_capa[IW_EVENT_CAPA_INDEX(cmd)] |= IW_EVENT_CAPA_MASK(cmd))
 640 #define IW_EVENT_CAPA_SET_KERNEL(event_capa) {event_capa[0] |= IW_EVENT_CAPA_K_0; event_capa[1] |= IW_EVENT_CAPA_K_1; }
 641
 642
 643 /****************************** TYPES ******************************/
 644
 645 /* --------------------------- SUBTYPES --------------------------- */
 646 /*
 647  *      Generic format for most parameters that fit in an int
 648  */
 649 struct  iw_param
 650 {
 651   __s32         value;          /* The value of the parameter itself */
 652   __u8          fixed;          /* Hardware should not use auto select */
 653   __u8          disabled;       /* Disable the feature */
 654   __u16         flags;          /* Various specifc flags (if any) */
 655 };
 656
 657 /*
 658  *      For all data larger than 16 octets, we need to use a
 659  *      pointer to memory allocated in user space.
 660  */
 661 struct  iw_point
 662 {
 663   void __user   *pointer;       /* Pointer to the data  (in user space) */
 664   __u16         length;         /* number of fields or size in bytes */
 665   __u16         flags;          /* Optional params */
 666 };
 667
 668 /*
 669  *      A frequency
 670  *      For numbers lower than 10^9, we encode the number in 'm' and
 671  *      set 'e' to 0
 672  *      For number greater than 10^9, we divide it by the lowest power
 673  *      of 10 to get 'm' lower than 10^9, with 'm'= f / (10^'e')...
 674  *      The power of 10 is in 'e', the result of the division is in 'm'.
 675  */
 676 struct  iw_freq
 677 {
 678         __s32           m;              /* Mantissa */
 679         __s16           e;              /* Exponent */
 680         __u8            i;              /* List index (when in range struct) */
 681         __u8            flags;          /* Flags (fixed/auto) */
 682 };
 683
 684 /*
 685  *      Quality of the link
 686  */
 687 struct  iw_quality
 688 {
 689         __u8            qual;           /* link quality (%retries, SNR,
 690                                            %missed beacons or better...) */
 691         __u8            level;          /* signal level (dBm) */
 692         __u8            noise;          /* noise level (dBm) */
 693         __u8            updated;        /* Flags to know if updated */
 694 };
 695
 696 /*
 697  *      Packet discarded in the wireless adapter due to
 698  *      "wireless" specific problems...
 699  *      Note : the list of counter and statistics in net_device_stats
 700  *      is already pretty exhaustive, and you should use that first.
 701  *      This is only additional stats...
 702  */
 703 struct  iw_discarded
 704 {
 705         __u32           nwid;           /* Rx : Wrong nwid/essid */
 706         __u32           code;           /* Rx : Unable to code/decode (WEP) */
 707         __u32           fragment;       /* Rx : Can't perform MAC reassembly */
 708         __u32           retries;        /* Tx : Max MAC retries num reached */
 709         __u32           misc;           /* Others cases */
 710 };
 711
 712 /*
 713  *      Packet/Time period missed in the wireless adapter due to
 714  *      "wireless" specific problems...
 715  */
 716 struct  iw_missed
 717 {
 718         __u32           beacon;         /* Missed beacons/superframe */
 719 };
 720
 721 /*
 722  *      Quality range (for spy threshold)
 723  */
 724 struct  iw_thrspy
 725 {
 726         struct sockaddr         addr;           /* Source address (hw/mac) */
 727         struct iw_quality       qual;           /* Quality of the link */
 728         struct iw_quality       low;            /* Low threshold */
 729         struct iw_quality       high;           /* High threshold */
 730 };
 731
 732 /*
 733  *      Optional data for scan request
 734  *
 735  *      Note: these optional parameters are controlling parameters for the
 736  *      scanning behavior, these do not apply to getting scan results
 737  *      (SIOCGIWSCAN). Drivers are expected to keep a local BSS table and
 738  *      provide a merged results with all BSSes even if the previous scan
 739  *      request limited scanning to a subset, e.g., by specifying an SSID.
 740  *      Especially, scan results are required to include an entry for the
 741  *      current BSS if the driver is in Managed mode and associated with an AP.
 742  */
 743 struct  iw_scan_req
 744 {
 745         __u8            scan_type; /* IW_SCAN_TYPE_{ACTIVE,PASSIVE} */
 746         __u8            essid_len;
 747         __u8            num_channels; /* num entries in channel_list;
 748                                        * 0 = scan all allowed channels */
 749         __u8            flags; /* reserved as padding; use zero, this may
 750                                 * be used in the future for adding flags
 751                                 * to request different scan behavior */
 752         struct sockaddr bssid; /* ff:ff:ff:ff:ff:ff for broadcast BSSID or
 753                                 * individual address of a specific BSS */
 754
 755         /*
 756          * Use this ESSID if IW_SCAN_THIS_ESSID flag is used instead of using
 757          * the current ESSID. This allows scan requests for specific ESSID
 758          * without having to change the current ESSID and potentially breaking
 759          * the current association.
 760          */
 761         __u8            essid[IW_ESSID_MAX_SIZE];
 762
 763         /*
 764          * Optional parameters for changing the default scanning behavior.
 765          * These are based on the MLME-SCAN.request from IEEE Std 802.11.
 766          * TU is 1.024 ms. If these are set to 0, driver is expected to use
 767          * reasonable default values. min_channel_time defines the time that
 768          * will be used to wait for the first reply on each channel. If no
 769          * replies are received, next channel will be scanned after this. If
 770          * replies are received, total time waited on the channel is defined by
 771          * max_channel_time.
 772          */
 773         __u32           min_channel_time; /* in TU */
 774         __u32           max_channel_time; /* in TU */
 775
 776         struct iw_freq  channel_list[IW_MAX_FREQUENCIES];
 777 };
 778
 779 /* ------------------------- WPA SUPPORT ------------------------- */
 780
 781 /*
 782  *      Extended data structure for get/set encoding (this is used with
 783  *      SIOCSIWENCODEEXT/SIOCGIWENCODEEXT. struct iw_point and IW_ENCODE_*
 784  *      flags are used in the same way as with SIOCSIWENCODE/SIOCGIWENCODE and
 785  *      only the data contents changes (key data -> this structure, including
 786  *      key data).
 787  *
 788  *      If the new key is the first group key, it will be set as the default
 789  *      TX key. Otherwise, default TX key index is only changed if
 790  *      IW_ENCODE_EXT_SET_TX_KEY flag is set.
 791  *
 792  *      Key will be changed with SIOCSIWENCODEEXT in all cases except for
 793  *      special "change TX key index" operation which is indicated by setting
 794  *      key_len = 0 and ext_flags |= IW_ENCODE_EXT_SET_TX_KEY.
 795  *
 796  *      tx_seq/rx_seq are only used when respective
 797  *      IW_ENCODE_EXT_{TX,RX}_SEQ_VALID flag is set in ext_flags. Normal
 798  *      TKIP/CCMP operation is to set RX seq with SIOCSIWENCODEEXT and start
 799  *      TX seq from zero whenever key is changed. SIOCGIWENCODEEXT is normally
 800  *      used only by an Authenticator (AP or an IBSS station) to get the
 801  *      current TX sequence number. Using TX_SEQ_VALID for SIOCSIWENCODEEXT and
 802  *      RX_SEQ_VALID for SIOCGIWENCODEEXT are optional, but can be useful for
 803  *      debugging/testing.
 804  */
 805 struct  iw_encode_ext
 806 {
 807         __u32           ext_flags; /* IW_ENCODE_EXT_* */
 808         __u8            tx_seq[IW_ENCODE_SEQ_MAX_SIZE]; /* LSB first */
 809         __u8            rx_seq[IW_ENCODE_SEQ_MAX_SIZE]; /* LSB first */
 810         struct sockaddr addr; /* ff:ff:ff:ff:ff:ff for broadcast/multicast
 811                                * (group) keys or unicast address for
 812                                * individual keys */
 813         __u16           alg; /* IW_ENCODE_ALG_* */
 814         __u16           key_len;
 815         __u8            key[0];
 816 };
 817
 818 /* SIOCSIWMLME data */
 819 struct  iw_mlme
 820 {
 821         __u16           cmd; /* IW_MLME_* */
 822         __u16           reason_code;
 823         struct sockaddr addr;
 824 };
 825
 826 /* SIOCSIWPMKSA data */
 827 #define IW_PMKSA_ADD            1
 828 #define IW_PMKSA_REMOVE         2
 829 #define IW_PMKSA_FLUSH          3
 830
 831 #define IW_PMKID_LEN    16
 832
 833 struct  iw_pmksa
 834 {
 835         __u32           cmd; /* IW_PMKSA_* */
 836         struct sockaddr bssid;
 837         __u8            pmkid[IW_PMKID_LEN];
 838 };
 839
 840 /* IWEVMICHAELMICFAILURE data */
 841 struct  iw_michaelmicfailure
 842 {
 843         __u32           flags;
 844         struct sockaddr src_addr;
 845         __u8            tsc[IW_ENCODE_SEQ_MAX_SIZE]; /* LSB first */
 846 };
 847
 848 /* IWEVPMKIDCAND data */
 849 #define IW_PMKID_CAND_PREAUTH   0x00000001 /* RNS pre-authentication enabled */
 850 struct  iw_pmkid_cand
 851 {
 852         __u32           flags; /* IW_PMKID_CAND_* */
 853         __u32           index; /* the smaller the index, the higher the
 854                                 * priority */
 855         struct sockaddr bssid;
 856 };
 857
 858 /* ------------------------ WIRELESS STATS ------------------------ */
 859 /*
 860  * Wireless statistics (used for /proc/net/wireless)
 861  */
 862 struct  iw_statistics
 863 {
 864         __u16           status;         /* Status
 865                                          * - device dependent for now */
 866
 867         struct iw_quality       qual;           /* Quality of the link
 868                                                  * (instant/mean/max) */
 869         struct iw_discarded     discard;        /* Packet discarded counts */
 870         struct iw_missed        miss;           /* Packet missed counts */
 871 };
 872
 873 /* ------------------------ IOCTL REQUEST ------------------------ */
 874 /*
 875  * This structure defines the payload of an ioctl, and is used
 876  * below.
 877  *
 878  * Note that this structure should fit on the memory footprint
 879  * of iwreq (which is the same as ifreq), which mean a max size of
 880  * 16 octets = 128 bits. Warning, pointers might be 64 bits wide...
 881  * You should check this when increasing the structures defined
 882  * above in this file...
 883  */
 884 union   iwreq_data
 885 {
 886         /* Config - generic */
 887         char            name[IFNAMSIZ];
 888         /* Name : used to verify the presence of  wireless extensions.
 889          * Name of the protocol/provider... */
 890
 891         struct iw_point essid;          /* Extended network name */
 892         struct iw_param nwid;           /* network id (or domain - the cell) */
 893         struct iw_freq  freq;           /* frequency or channel :
 894                                          * 0-1000 = channel
 895                                          * > 1000 = frequency in Hz */
 896
 897         struct iw_param sens;           /* signal level threshold */
 898         struct iw_param bitrate;        /* default bit rate */
 899         struct iw_param txpower;        /* default transmit power */
 900         struct iw_param rts;            /* RTS threshold threshold */
 901         struct iw_param frag;           /* Fragmentation threshold */
 902         __u32           mode;           /* Operation mode */
 903         struct iw_param retry;          /* Retry limits & lifetime */
 904
 905         struct iw_point encoding;       /* Encoding stuff : tokens */
 906         struct iw_param power;          /* PM duration/timeout */
 907         struct iw_quality qual;         /* Quality part of statistics */
 908
 909         struct sockaddr ap_addr;        /* Access point address */
 910         struct sockaddr addr;           /* Destination address (hw/mac) */
 911
 912         struct iw_param param;          /* Other small parameters */
 913         struct iw_point data;           /* Other large parameters */
 914 };
 915
 916 /*
 917  * The structure to exchange data for ioctl.
 918  * This structure is the same as 'struct ifreq', but (re)defined for
 919  * convenience...
 920  * Do I need to remind you about structure size (32 octets) ?
 921  */
 922 struct  iwreq
 923 {
 924         union
 925         {
 926                 char    ifrn_name[IFNAMSIZ];    /* if name, e.g. "eth0" */
 927         } ifr_ifrn;
 928
 929         /* Data part (defined just above) */
 930         union   iwreq_data      u;
 931 };
 932
 933 /* -------------------------- IOCTL DATA -------------------------- */
 934 /*
 935  *      For those ioctl which want to exchange mode data that what could
 936  *      fit in the above structure...
 937  */
 938
 939 /*
 940  *      Range of parameters
 941  */
 942
 943 struct  iw_range
 944 {
 945         /* Informative stuff (to choose between different interface) */
 946         __u32           throughput;     /* To give an idea... */
 947         /* In theory this value should be the maximum benchmarked
 948          * TCP/IP throughput, because with most of these devices the
 949          * bit rate is meaningless (overhead an co) to estimate how
 950          * fast the connection will go and pick the fastest one.
 951          * I suggest people to play with Netperf or any benchmark...
 952          */
 953
 954         /* NWID (or domain id) */
 955         __u32           min_nwid;       /* Minimal NWID we are able to set */
 956         __u32           max_nwid;       /* Maximal NWID we are able to set */
 957
 958         /* Old Frequency (backward compat - moved lower ) */
 959         __u16           old_num_channels;
 960         __u8            old_num_frequency;
 961
 962         /* Wireless event capability bitmasks */
 963         __u32           event_capa[6];
 964
 965         /* signal level threshold range */
 966         __s32           sensitivity;
 967
 968         /* Quality of link & SNR stuff */
 969         /* Quality range (link, level, noise)
 970          * If the quality is absolute, it will be in the range [0 ; max_qual],
 971          * if the quality is dBm, it will be in the range [max_qual ; 0].
 972          * Don't forget that we use 8 bit arithmetics... */
 973         struct iw_quality       max_qual;       /* Quality of the link */
 974         /* This should contain the average/typical values of the quality
 975          * indicator. This should be the threshold between a "good" and
 976          * a "bad" link (example : monitor going from green to orange).
 977          * Currently, user space apps like quality monitors don't have any
 978          * way to calibrate the measurement. With this, they can split
 979          * the range between 0 and max_qual in different quality level
 980          * (using a geometric subdivision centered on the average).
 981          * I expect that people doing the user space apps will feedback
 982          * us on which value we need to put in each driver... */
 983         struct iw_quality       avg_qual;       /* Quality of the link */
 984
 985         /* Rates */
 986         __u8            num_bitrates;   /* Number of entries in the list */
 987         __s32           bitrate[IW_MAX_BITRATES];       /* list, in bps */
 988
 989         /* RTS threshold */
 990         __s32           min_rts;        /* Minimal RTS threshold */
 991         __s32           max_rts;        /* Maximal RTS threshold */
 992
 993         /* Frag threshold */
 994         __s32           min_frag;       /* Minimal frag threshold */
 995         __s32           max_frag;       /* Maximal frag threshold */
 996
 997         /* Power Management duration & timeout */
 998         __s32           min_pmp;        /* Minimal PM period */
 999         __s32           max_pmp;        /* Maximal PM period */
1000         __s32           min_pmt;        /* Minimal PM timeout */
1001         __s32           max_pmt;        /* Maximal PM timeout */
1002         __u16           pmp_flags;      /* How to decode max/min PM period */
1003         __u16           pmt_flags;      /* How to decode max/min PM timeout */
1004         __u16           pm_capa;        /* What PM options are supported */
1005
1006         /* Encoder stuff */
1007         __u16   encoding_size[IW_MAX_ENCODING_SIZES];   /* Different token sizes */
1008         __u8    num_encoding_sizes;     /* Number of entry in the list */
1009         __u8    max_encoding_tokens;    /* Max number of tokens */
1010         /* For drivers that need a "login/passwd" form */
1011         __u8    encoding_login_index;   /* token index for login token */
1012
1013         /* Transmit power */
1014         __u16           txpower_capa;   /* What options are supported */
1015         __u8            num_txpower;    /* Number of entries in the list */
1016         __s32           txpower[IW_MAX_TXPOWER];        /* list, in bps */
1017
1018         /* Wireless Extension version info */
1019         __u8            we_version_compiled;    /* Must be WIRELESS_EXT */
1020         __u8            we_version_source;      /* Last update of source */
1021
1022         /* Retry limits and lifetime */
1023         __u16           retry_capa;     /* What retry options are supported */
1024         __u16           retry_flags;    /* How to decode max/min retry limit */
1025         __u16           r_time_flags;   /* How to decode max/min retry life */
1026         __s32           min_retry;      /* Minimal number of retries */
1027         __s32           max_retry;      /* Maximal number of retries */
1028         __s32           min_r_time;     /* Minimal retry lifetime */
1029         __s32           max_r_time;     /* Maximal retry lifetime */
1030
1031         /* Frequency */
1032         __u16           num_channels;   /* Number of channels [0; num - 1] */
1033         __u8            num_frequency;  /* Number of entry in the list */
1034         struct iw_freq  freq[IW_MAX_FREQUENCIES];       /* list */
1035         /* Note : this frequency list doesn't need to fit channel numbers,
1036          * because each entry contain its channel index */
1037
1038         __u32           enc_capa;       /* IW_ENC_CAPA_* bit field */
1039 };
1040
1041 /*
1042  * Private ioctl interface information
1043  */
1044
1045 struct  iw_priv_args
1046 {
1047         __u32           cmd;            /* Number of the ioctl to issue */
1048         __u16           set_args;       /* Type and number of args */
1049         __u16           get_args;       /* Type and number of args */
1050         char            name[IFNAMSIZ]; /* Name of the extension */
1051 };
1052
1053 /* ----------------------- WIRELESS EVENTS ----------------------- */
1054 /*
1055  * Wireless events are carried through the rtnetlink socket to user
1056  * space. They are encapsulated in the IFLA_WIRELESS field of
1057  * a RTM_NEWLINK message.
1058  */
1059
1060 /*
1061  * A Wireless Event. Contains basically the same data as the ioctl...
1062  */
1063 struct iw_event
1064 {
1065         __u16           len;                    /* Real lenght of this stuff */
1066         __u16           cmd;                    /* Wireless IOCTL */
1067         union iwreq_data        u;              /* IOCTL fixed payload */
1068 };
1069
1070 /* Size of the Event prefix (including padding and alignement junk) */
1071 #define IW_EV_LCP_LEN   (sizeof(struct iw_event) - sizeof(union iwreq_data))
1072 /* Size of the various events */
1073 #define IW_EV_CHAR_LEN  (IW_EV_LCP_LEN + IFNAMSIZ)
1074 #define IW_EV_UINT_LEN  (IW_EV_LCP_LEN + sizeof(__u32))
1075 #define IW_EV_FREQ_LEN  (IW_EV_LCP_LEN + sizeof(struct iw_freq))
1076 #define IW_EV_PARAM_LEN (IW_EV_LCP_LEN + sizeof(struct iw_param))
1077 #define IW_EV_ADDR_LEN  (IW_EV_LCP_LEN + sizeof(struct sockaddr))
1078 #define IW_EV_QUAL_LEN  (IW_EV_LCP_LEN + sizeof(struct iw_quality))
1079
1080 /* iw_point events are special. First, the payload (extra data) come at
1081  * the end of the event, so they are bigger than IW_EV_POINT_LEN. Second,
1082  * we omit the pointer, so start at an offset. */
1083 #define IW_EV_POINT_OFF (((char *) &(((struct iw_point *) NULL)->length)) - \
1084                           (char *) NULL)
1085 #define IW_EV_POINT_LEN (IW_EV_LCP_LEN + sizeof(struct iw_point) - \
1086                          IW_EV_POINT_OFF)
1087
1088 #endif  /* _LINUX_WIRELESS_H */