testing/wireless/wireless-12.h

   1 /*
   2  * This file define a set of standard wireless extensions
   3  *
   4  * Version :    12      5.10.01
   5  *
   6  * Authors :    Jean Tourrilhes - HPL - <jt@hpl.hp.com>
   7  */
   8
   9 #ifndef _LINUX_WIRELESS_H
  10 #define _LINUX_WIRELESS_H
  11
  12 /************************** DOCUMENTATION **************************/
  13 /*
  14  * Basically, the wireless extensions are for now a set of standard ioctl
  15  * call + /proc/net/wireless
  16  *
  17  * The entry /proc/net/wireless give statistics and information on the
  18  * driver.
  19  * This is better than having each driver having its entry because
  20  * its centralised and we may remove the driver module safely.
  21  *
  22  * Ioctl are used to configure the driver and issue commands.  This is
  23  * better than command line options of insmod because we may want to
  24  * change dynamically (while the driver is running) some parameters.
  25  *
  26  * The ioctl mechanimsm are copied from standard devices ioctl.
  27  * We have the list of command plus a structure descibing the
  28  * data exchanged...
  29  * Note that to add these ioctl, I was obliged to modify :
  30  *      net/core/dev.c (two place + add include)
  31  *      net/ipv4/af_inet.c (one place + add include)
  32  *
  33  * /proc/net/wireless is a copy of /proc/net/dev.
  34  * We have a structure for data passed from the driver to /proc/net/wireless
  35  * Too add this, I've modified :
  36  *      net/core/dev.c (two other places)
  37  *      include/linux/netdevice.h (one place)
  38  *      include/linux/proc_fs.h (one place)
  39  *
  40  * Do not add here things that are redundant with other mechanisms
  41  * (drivers init, ifconfig, /proc/net/dev, ...) and with are not
  42  * wireless specific.
  43  *
  44  * These wireless extensions are not magic : each driver has to provide
  45  * support for them...
  46  *
  47  * IMPORTANT NOTE : As everything in the kernel, this is very much a
  48  * work in progress. Contact me if you have ideas of improvements...
  49  */
  50
  51 /***************************** INCLUDES *****************************/
  52
  53 #include <linux/types.h>                /* for "caddr_t" et al          */
  54 #include <linux/socket.h>               /* for "struct sockaddr" et al  */
  55 #include <linux/if.h>                   /* for IFNAMSIZ and co... */
  56
  57 /**************************** CONSTANTS ****************************/
  58
  59 /* --------------------------- VERSION --------------------------- */
  60 /*
  61  * This constant is used to know the availability of the wireless
  62  * extensions and to know which version of wireless extensions it is
  63  * (there is some stuff that will be added in the future...)
  64  * I just plan to increment with each new version.
  65  */
  66 #define WIRELESS_EXT    12
  67
  68 /*
  69  * Changes :
  70  *
  71  * V2 to V3
  72  * --------
  73  *      Alan Cox start some incompatibles changes. I've integrated a bit more.
  74  *      - Encryption renamed to Encode to avoid US regulation problems
  75  *      - Frequency changed from float to struct to avoid problems on old 386
  76  *
  77  * V3 to V4
  78  * --------
  79  *      - Add sensitivity
  80  *
  81  * V4 to V5
  82  * --------
  83  *      - Missing encoding definitions in range
  84  *      - Access points stuff
  85  *
  86  * V5 to V6
  87  * --------
  88  *      - 802.11 support (ESSID ioctls)
  89  *
  90  * V6 to V7
  91  * --------
  92  *      - define IW_ESSID_MAX_SIZE and IW_MAX_AP
  93  *
  94  * V7 to V8
  95  * --------
  96  *      - Changed my e-mail address
  97  *      - More 802.11 support (nickname, rate, rts, frag)
  98  *      - List index in frequencies
  99  *
 100  * V8 to V9
 101  * --------
 102  *      - Support for 'mode of operation' (ad-hoc, managed...)
 103  *      - Support for unicast and multicast power saving
 104  *      - Change encoding to support larger tokens (>64 bits)
 105  *      - Updated iw_params (disable, flags) and use it for NWID
 106  *      - Extracted iw_point from iwreq for clarity
 107  *
 108  * V9 to V10
 109  * ---------
 110  *      - Add PM capability to range structure
 111  *      - Add PM modifier : MAX/MIN/RELATIVE
 112  *      - Add encoding option : IW_ENCODE_NOKEY
 113  *      - Add TxPower ioctls (work like TxRate)
 114  *
 115  * V10 to V11
 116  * ----------
 117  *      - Add WE version in range (help backward/forward compatibility)
 118  *      - Add retry ioctls (work like PM)
 119  *
 120  * V11 to V12
 121  * ----------
 122  *      - Add SIOCSIWSTATS to get /proc/net/wireless programatically
 123  *      - Add DEV PRIVATE IOCTL to avoid collisions in SIOCDEVPRIVATE space
 124  *      - Add new statistics (frag, retry, beacon)
 125  *      - Add average quality (for user space calibration)
 126  */
 127
 128 /* -------------------------- IOCTL LIST -------------------------- */
 129
 130 /* Basic operations */
 131 #define SIOCSIWNAME     0x8B00          /* Unused */
 132 #define SIOCGIWNAME     0x8B01          /* get name == wireless protocol */
 133 #define SIOCSIWNWID     0x8B02          /* set network id (the cell) */
 134 #define SIOCGIWNWID     0x8B03          /* get network id */
 135 #define SIOCSIWFREQ     0x8B04          /* set channel/frequency (Hz) */
 136 #define SIOCGIWFREQ     0x8B05          /* get channel/frequency (Hz) */
 137 #define SIOCSIWMODE     0x8B06          /* set operation mode */
 138 #define SIOCGIWMODE     0x8B07          /* get operation mode */
 139 #define SIOCSIWSENS     0x8B08          /* set sensitivity (dBm) */
 140 #define SIOCGIWSENS     0x8B09          /* get sensitivity (dBm) */
 141
 142 /* Informative stuff */
 143 #define SIOCSIWRANGE    0x8B0A          /* Unused */
 144 #define SIOCGIWRANGE    0x8B0B          /* Get range of parameters */
 145 #define SIOCSIWPRIV     0x8B0C          /* Unused */
 146 #define SIOCGIWPRIV     0x8B0D          /* get private ioctl interface info */
 147 #define SIOCSIWSTATS    0x8B0E          /* Unused */
 148 #define SIOCGIWSTATS    0x8B0F          /* Get /proc/net/wireless stats */
 149
 150 /* Mobile IP support */
 151 #define SIOCSIWSPY      0x8B10          /* set spy addresses */
 152 #define SIOCGIWSPY      0x8B11          /* get spy info (quality of link) */
 153
 154 /* Access Point manipulation */
 155 #define SIOCSIWAP       0x8B14          /* set access point MAC addresses */
 156 #define SIOCGIWAP       0x8B15          /* get access point MAC addresses */
 157 #define SIOCGIWAPLIST   0x8B17          /* get list of access point in range */
 158
 159 /* 802.11 specific support */
 160 #define SIOCSIWESSID    0x8B1A          /* set ESSID (network name) */
 161 #define SIOCGIWESSID    0x8B1B          /* get ESSID */
 162 #define SIOCSIWNICKN    0x8B1C          /* set node name/nickname */
 163 #define SIOCGIWNICKN    0x8B1D          /* get node name/nickname */
 164 /* As the ESSID and NICKN are strings up to 32 bytes long, it doesn't fit
 165  * within the 'iwreq' structure, so we need to use the 'data' member to
 166  * point to a string in user space, like it is done for RANGE...
 167  * The "flags" member indicate if the ESSID is active or not (promiscuous).
 168  */
 169
 170 /* Other parameters useful in 802.11 and some other devices */
 171 #define SIOCSIWRATE     0x8B20          /* set default bit rate (bps) */
 172 #define SIOCGIWRATE     0x8B21          /* get default bit rate (bps) */
 173 #define SIOCSIWRTS      0x8B22          /* set RTS/CTS threshold (bytes) */
 174 #define SIOCGIWRTS      0x8B23          /* get RTS/CTS threshold (bytes) */
 175 #define SIOCSIWFRAG     0x8B24          /* set fragmentation thr (bytes) */
 176 #define SIOCGIWFRAG     0x8B25          /* get fragmentation thr (bytes) */
 177 #define SIOCSIWTXPOW    0x8B26          /* set transmit power (dBm) */
 178 #define SIOCGIWTXPOW    0x8B27          /* get transmit power (dBm) */
 179 #define SIOCSIWRETRY    0x8B28          /* set retry limits and lifetime */
 180 #define SIOCGIWRETRY    0x8B29          /* get retry limits and lifetime */
 181
 182 /* Encoding stuff (scrambling, hardware security, WEP...) */
 183 #define SIOCSIWENCODE   0x8B2A          /* set encoding token & mode */
 184 #define SIOCGIWENCODE   0x8B2B          /* get encoding token & mode */
 185 /* Power saving stuff (power management, unicast and multicast) */
 186 #define SIOCSIWPOWER    0x8B2C          /* set Power Management settings */
 187 #define SIOCGIWPOWER    0x8B2D          /* get Power Management settings */
 188
 189 /* -------------------- DEV PRIVATE IOCTL LIST -------------------- */
 190
 191 /* These 16 ioctl are wireless device private.
 192  * Each driver is free to use them for whatever purpose it chooses,
 193  * however the driver *must* export the description of those ioctls
 194  * with SIOCGIWPRIV and *must* use arguments as defined below.
 195  * If you don't follow those rules, DaveM is going to hate you (reason :
 196  * it make mixed 32/64bit operation impossible).
 197  */
 198 #define SIOCIWFIRSTPRIV 0x8BE0
 199 #define SIOCIWLASTPRIV  0x8BFF
 200 /* Previously, we were using SIOCDEVPRIVATE, but we now have our
 201  * separate range because of collisions with other tools such as
 202  * 'mii-tool'.
 203  * We now have 32 commands, so a bit more space ;-).
 204  * Also, all 'odd' commands are only usable by root and don't return the
 205  * content of ifr/iwr to user (but you are not obliged to use the set/get
 206  * convention, just use every other two command).
 207  * And I repeat : you are not obliged to use them with iwspy, but you
 208  * must be compliant with it.
 209  */
 210
 211 /* ------------------------- IOCTL STUFF ------------------------- */
 212
 213 /* The first and the last (range) */
 214 #define SIOCIWFIRST     0x8B00
 215 #define SIOCIWLAST      SIOCIWLASTPRIV          /* 0x8BFF */
 216
 217 /* Even : get (world access), odd : set (root access) */
 218 #define IW_IS_SET(cmd)  (!((cmd) & 0x1))
 219 #define IW_IS_GET(cmd)  ((cmd) & 0x1)
 220
 221 /* ------------------------- PRIVATE INFO ------------------------- */
 222 /*
 223  * The following is used with SIOCGIWPRIV. It allow a driver to define
 224  * the interface (name, type of data) for its private ioctl.
 225  * Privates ioctl are SIOCIWFIRSTPRIV -> SIOCIWLASTPRIV
 226  */
 227
 228 #define IW_PRIV_TYPE_MASK       0x7000  /* Type of arguments */
 229 #define IW_PRIV_TYPE_NONE       0x0000
 230 #define IW_PRIV_TYPE_BYTE       0x1000  /* Char as number */
 231 #define IW_PRIV_TYPE_CHAR       0x2000  /* Char as character */
 232 #define IW_PRIV_TYPE_INT        0x4000  /* 32 bits int */
 233 #define IW_PRIV_TYPE_FLOAT      0x5000
 234
 235 #define IW_PRIV_SIZE_FIXED      0x0800  /* Variable or fixed nuber of args */
 236
 237 #define IW_PRIV_SIZE_MASK       0x07FF  /* Max number of those args */
 238
 239 /*
 240  * Note : if the number of args is fixed and the size < 16 octets,
 241  * instead of passing a pointer we will put args in the iwreq struct...
 242  */
 243
 244 /* ----------------------- OTHER CONSTANTS ----------------------- */
 245
 246 /* Maximum frequencies in the range struct */
 247 #define IW_MAX_FREQUENCIES      16
 248 /* Note : if you have something like 80 frequencies,
 249  * don't increase this constant and don't fill the frequency list.
 250  * The user will be able to set by channel anyway... */
 251
 252 /* Maximum bit rates in the range struct */
 253 #define IW_MAX_BITRATES         8
 254
 255 /* Maximum tx powers in the range struct */
 256 #define IW_MAX_TXPOWER          8
 257
 258 /* Maximum of address that you may set with SPY */
 259 #define IW_MAX_SPY              8
 260
 261 /* Maximum of address that you may get in the
 262    list of access points in range */
 263 #define IW_MAX_AP               8
 264
 265 /* Maximum size of the ESSID and NICKN strings */
 266 #define IW_ESSID_MAX_SIZE       32
 267
 268 /* Modes of operation */
 269 #define IW_MODE_AUTO    0       /* Let the driver decides */
 270 #define IW_MODE_ADHOC   1       /* Single cell network */
 271 #define IW_MODE_INFRA   2       /* Multi cell network, roaming, ... */
 272 #define IW_MODE_MASTER  3       /* Synchronisation master or Access Point */
 273 #define IW_MODE_REPEAT  4       /* Wireless Repeater (forwarder) */
 274 #define IW_MODE_SECOND  5       /* Secondary master/repeater (backup) */
 275
 276 /* Maximum number of size of encoding token available
 277  * they are listed in the range structure */
 278 #define IW_MAX_ENCODING_SIZES   8
 279
 280 /* Maximum size of the encoding token in bytes */
 281 #define IW_ENCODING_TOKEN_MAX   32      /* 256 bits (for now) */
 282
 283 /* Flags for encoding (along with the token) */
 284 #define IW_ENCODE_INDEX         0x00FF  /* Token index (if needed) */
 285 #define IW_ENCODE_FLAGS         0xFF00  /* Flags defined below */
 286 #define IW_ENCODE_MODE          0xF000  /* Modes defined below */
 287 #define IW_ENCODE_DISABLED      0x8000  /* Encoding disabled */
 288 #define IW_ENCODE_ENABLED       0x0000  /* Encoding enabled */
 289 #define IW_ENCODE_RESTRICTED    0x4000  /* Refuse non-encoded packets */
 290 #define IW_ENCODE_OPEN          0x2000  /* Accept non-encoded packets */
 291 #define IW_ENCODE_NOKEY         0x0800  /* Key is write only, so not present */
 292
 293 /* Power management flags available (along with the value, if any) */
 294 #define IW_POWER_ON             0x0000  /* No details... */
 295 #define IW_POWER_TYPE           0xF000  /* Type of parameter */
 296 #define IW_POWER_PERIOD         0x1000  /* Value is a period/duration of  */
 297 #define IW_POWER_TIMEOUT        0x2000  /* Value is a timeout (to go asleep) */
 298 #define IW_POWER_MODE           0x0F00  /* Power Management mode */
 299 #define IW_POWER_UNICAST_R      0x0100  /* Receive only unicast messages */
 300 #define IW_POWER_MULTICAST_R    0x0200  /* Receive only multicast messages */
 301 #define IW_POWER_ALL_R          0x0300  /* Receive all messages though PM */
 302 #define IW_POWER_FORCE_S        0x0400  /* Force PM procedure for sending unicast */
 303 #define IW_POWER_REPEATER       0x0800  /* Repeat broadcast messages in PM period */
 304 #define IW_POWER_MODIFIER       0x000F  /* Modify a parameter */
 305 #define IW_POWER_MIN            0x0001  /* Value is a minimum  */
 306 #define IW_POWER_MAX            0x0002  /* Value is a maximum */
 307 #define IW_POWER_RELATIVE       0x0004  /* Value is not in seconds/ms/us */
 308
 309 /* Transmit Power flags available */
 310 #define IW_TXPOW_DBM            0x0000  /* Value is in dBm */
 311 #define IW_TXPOW_MWATT          0x0001  /* Value is in mW */
 312
 313 /* Retry limits and lifetime flags available */
 314 #define IW_RETRY_ON             0x0000  /* No details... */
 315 #define IW_RETRY_TYPE           0xF000  /* Type of parameter */
 316 #define IW_RETRY_LIMIT          0x1000  /* Maximum number of retries*/
 317 #define IW_RETRY_LIFETIME       0x2000  /* Maximum duration of retries in us */
 318 #define IW_RETRY_MODIFIER       0x000F  /* Modify a parameter */
 319 #define IW_RETRY_MIN            0x0001  /* Value is a minimum  */
 320 #define IW_RETRY_MAX            0x0002  /* Value is a maximum */
 321 #define IW_RETRY_RELATIVE       0x0004  /* Value is not in seconds/ms/us */
 322
 323 /****************************** TYPES ******************************/
 324
 325 /* --------------------------- SUBTYPES --------------------------- */
 326 /*
 327  *      Generic format for most parameters that fit in an int
 328  */
 329 struct  iw_param
 330 {
 331   __s32         value;          /* The value of the parameter itself */
 332   __u8          fixed;          /* Hardware should not use auto select */
 333   __u8          disabled;       /* Disable the feature */
 334   __u16         flags;          /* Various specifc flags (if any) */
 335 };
 336
 337 /*
 338  *      For all data larger than 16 octets, we need to use a
 339  *      pointer to memory allocated in user space.
 340  */
 341 struct  iw_point
 342 {
 343   caddr_t       pointer;        /* Pointer to the data  (in user space) */
 344   __u16         length;         /* number of fields or size in bytes */
 345   __u16         flags;          /* Optional params */
 346 };
 347
 348 /*
 349  *      A frequency
 350  *      For numbers lower than 10^9, we encode the number in 'm' and
 351  *      set 'e' to 0
 352  *      For number greater than 10^9, we divide it by the lowest power
 353  *      of 10 to get 'm' lower than 10^9, with 'm'= f / (10^'e')...
 354  *      The power of 10 is in 'e', the result of the division is in 'm'.
 355  */
 356 struct  iw_freq
 357 {
 358         __u32           m;              /* Mantissa */
 359         __u16           e;              /* Exponent */
 360         __u8            i;              /* List index (when in range struct) */
 361 };
 362
 363 /*
 364  *      Quality of the link
 365  */
 366 struct  iw_quality
 367 {
 368         __u8            qual;           /* link quality (%retries, SNR,
 369                                            %missed beacons or better...) */
 370         __u8            level;          /* signal level (dBm) */
 371         __u8            noise;          /* noise level (dBm) */
 372         __u8            updated;        /* Flags to know if updated */
 373 };
 374
 375 /*
 376  *      Packet discarded in the wireless adapter due to
 377  *      "wireless" specific problems...
 378  *      Note : the list of counter and statistics in net_device_stats
 379  *      is already pretty exhaustive, and you should use that first.
 380  *      This is only additional stats...
 381  */
 382 struct  iw_discarded
 383 {
 384         __u32           nwid;           /* Rx : Wrong nwid/essid */
 385         __u32           code;           /* Rx : Unable to code/decode (WEP) */
 386         __u32           fragment;       /* Rx : Can't perform MAC reassembly */
 387         __u32           retries;        /* Tx : Max MAC retries num reached */
 388         __u32           misc;           /* Others cases */
 389 };
 390
 391 /*
 392  *      Packet/Time period missed in the wireless adapter due to
 393  *      "wireless" specific problems...
 394  */
 395 struct  iw_missed
 396 {
 397         __u32           beacon;         /* Missed beacons/superframe */
 398 };
 399
 400 /* ------------------------ WIRELESS STATS ------------------------ */
 401 /*
 402  * Wireless statistics (used for /proc/net/wireless)
 403  */
 404 struct  iw_statistics
 405 {
 406         __u16           status;         /* Status
 407                                          * - device dependent for now */
 408
 409         struct iw_quality       qual;           /* Quality of the link
 410                                                  * (instant/mean/max) */
 411         struct iw_discarded     discard;        /* Packet discarded counts */
 412         struct iw_missed        miss;           /* Packet missed counts */
 413 };
 414
 415 /* ------------------------ IOCTL REQUEST ------------------------ */
 416 /*
 417  * The structure to exchange data for ioctl.
 418  * This structure is the same as 'struct ifreq', but (re)defined for
 419  * convenience...
 420  *
 421  * Note that it should fit on the same memory footprint !
 422  * You should check this when increasing the above structures (16 octets)
 423  * 16 octets = 128 bits. Warning, pointers might be 64 bits wide...
 424  */
 425 struct  iwreq
 426 {
 427         union
 428         {
 429                 char    ifrn_name[IFNAMSIZ];    /* if name, e.g. "eth0" */
 430         } ifr_ifrn;
 431
 432         /* Data part */
 433         union
 434         {
 435                 /* Config - generic */
 436                 char            name[IFNAMSIZ];
 437                 /* Name : used to verify the presence of  wireless extensions.
 438                  * Name of the protocol/provider... */
 439
 440                 struct iw_point essid;  /* Extended network name */
 441                 struct iw_param nwid;   /* network id (or domain - the cell) */
 442                 struct iw_freq  freq;   /* frequency or channel :
 443                                          * 0-1000 = channel
 444                                          * > 1000 = frequency in Hz */
 445
 446                 struct iw_param sens;           /* signal level threshold */
 447                 struct iw_param bitrate;        /* default bit rate */
 448                 struct iw_param txpower;        /* default transmit power */
 449                 struct iw_param rts;            /* RTS threshold threshold */
 450                 struct iw_param frag;           /* Fragmentation threshold */
 451                 __u32           mode;           /* Operation mode */
 452                 struct iw_param retry;          /* Retry limits & lifetime */
 453
 454                 struct iw_point encoding;       /* Encoding stuff : tokens */
 455                 struct iw_param power;          /* PM duration/timeout */
 456
 457                 struct sockaddr ap_addr;        /* Access point address */
 458
 459                 struct iw_point data;           /* Other large parameters */
 460         }       u;
 461 };
 462
 463 /* -------------------------- IOCTL DATA -------------------------- */
 464 /*
 465  *      For those ioctl which want to exchange mode data that what could
 466  *      fit in the above structure...
 467  */
 468
 469 /*
 470  *      Range of parameters
 471  */
 472
 473 struct  iw_range
 474 {
 475         /* Informative stuff (to choose between different interface) */
 476         __u32           throughput;     /* To give an idea... */
 477         /* In theory this value should be the maximum benchmarked
 478          * TCP/IP throughput, because with most of these devices the
 479          * bit rate is meaningless (overhead an co) to estimate how
 480          * fast the connection will go and pick the fastest one.
 481          * I suggest people to play with Netperf or any benchmark...
 482          */
 483
 484         /* NWID (or domain id) */
 485         __u32           min_nwid;       /* Minimal NWID we are able to set */
 486         __u32           max_nwid;       /* Maximal NWID we are able to set */
 487
 488         /* Frequency */
 489         __u16           num_channels;   /* Number of channels [0; num - 1] */
 490         __u8            num_frequency;  /* Number of entry in the list */
 491         struct iw_freq  freq[IW_MAX_FREQUENCIES];       /* list */
 492         /* Note : this frequency list doesn't need to fit channel numbers */
 493
 494         /* signal level threshold range */
 495         __s32   sensitivity;
 496
 497         /* Quality of link & SNR stuff */
 498         struct iw_quality       max_qual;       /* Quality of the link */
 499
 500         /* Rates */
 501         __u8            num_bitrates;   /* Number of entries in the list */
 502         __s32           bitrate[IW_MAX_BITRATES];       /* list, in bps */
 503
 504         /* RTS threshold */
 505         __s32           min_rts;        /* Minimal RTS threshold */
 506         __s32           max_rts;        /* Maximal RTS threshold */
 507
 508         /* Frag threshold */
 509         __s32           min_frag;       /* Minimal frag threshold */
 510         __s32           max_frag;       /* Maximal frag threshold */
 511
 512         /* Power Management duration & timeout */
 513         __s32           min_pmp;        /* Minimal PM period */
 514         __s32           max_pmp;        /* Maximal PM period */
 515         __s32           min_pmt;        /* Minimal PM timeout */
 516         __s32           max_pmt;        /* Maximal PM timeout */
 517         __u16           pmp_flags;      /* How to decode max/min PM period */
 518         __u16           pmt_flags;      /* How to decode max/min PM timeout */
 519         __u16           pm_capa;        /* What PM options are supported */
 520
 521         /* Encoder stuff */
 522         __u16   encoding_size[IW_MAX_ENCODING_SIZES];   /* Different token sizes */
 523         __u8    num_encoding_sizes;     /* Number of entry in the list */
 524         __u8    max_encoding_tokens;    /* Max number of tokens */
 525
 526         /* Transmit power */
 527         __u16           txpower_capa;   /* What options are supported */
 528         __u8            num_txpower;    /* Number of entries in the list */
 529         __s32           txpower[IW_MAX_TXPOWER];        /* list, in bps */
 530
 531         /* Wireless Extension version info */
 532         __u8            we_version_compiled;    /* Must be WIRELESS_EXT */
 533         __u8            we_version_source;      /* Last update of source */
 534
 535         /* Retry limits and lifetime */
 536         __u16           retry_capa;     /* What retry options are supported */
 537         __u16           retry_flags;    /* How to decode max/min retry limit */
 538         __u16           r_time_flags;   /* How to decode max/min retry life */
 539         __s32           min_retry;      /* Minimal number of retries */
 540         __s32           max_retry;      /* Maximal number of retries */
 541         __s32           min_r_time;     /* Minimal retry lifetime */
 542         __s32           max_r_time;     /* Maximal retry lifetime */
 543
 544         /* Average quality of link & SNR */
 545         struct iw_quality       avg_qual;       /* Quality of the link */
 546         /* This should contain the average/typical values of the quality
 547          * indicator. This should be the threshold between a "good" and
 548          * a "bad" link (example : monitor going from green to orange).
 549          * Currently, user space apps like quality monitors don't have any
 550          * way to calibrate the measurement. With this, they can split
 551          * the range between 0 and max_qual in different quality level
 552          * (using a geometric subdivision centered on the average).
 553          * I expect that people doing the user space apps will feedback
 554          * us on which value we need to put in each driver...
 555          */
 556 };
 557
 558 /*
 559  * Private ioctl interface information
 560  */
 561
 562 struct  iw_priv_args
 563 {
 564         __u32           cmd;            /* Number of the ioctl to issue */
 565         __u16           set_args;       /* Type and number of args */
 566         __u16           get_args;       /* Type and number of args */
 567         char            name[IFNAMSIZ]; /* Name of the extension */
 568 };
 569
 570 #endif  /* _LINUX_WIRELESS_H */