linux/include/linux/ieee80211.h
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   1/*
   2 * IEEE 802.11 defines
   3 *
   4 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   5 * <jkmaline@cc.hut.fi>
   6 * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
   7 * Copyright (c) 2005, Devicescape Software, Inc.
   8 * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
   9 *
  10 * This program is free software; you can redistribute it and/or modify
  11 * it under the terms of the GNU General Public License version 2 as
  12 * published by the Free Software Foundation.
  13 */
  14
  15#ifndef LINUX_IEEE80211_H
  16#define LINUX_IEEE80211_H
  17
  18#include <linux/types.h>
  19#include <asm/byteorder.h>
  20
  21/*
  22 * DS bit usage
  23 *
  24 * TA = transmitter address
  25 * RA = receiver address
  26 * DA = destination address
  27 * SA = source address
  28 *
  29 * ToDS    FromDS  A1(RA)  A2(TA)  A3      A4      Use
  30 * -----------------------------------------------------------------
  31 *  0       0       DA      SA      BSSID   -       IBSS/DLS
  32 *  0       1       DA      BSSID   SA      -       AP -> STA
  33 *  1       0       BSSID   SA      DA      -       AP <- STA
  34 *  1       1       RA      TA      DA      SA      unspecified (WDS)
  35 */
  36
  37#define FCS_LEN 4
  38
  39#define IEEE80211_FCTL_VERS             0x0003
  40#define IEEE80211_FCTL_FTYPE            0x000c
  41#define IEEE80211_FCTL_STYPE            0x00f0
  42#define IEEE80211_FCTL_TODS             0x0100
  43#define IEEE80211_FCTL_FROMDS           0x0200
  44#define IEEE80211_FCTL_MOREFRAGS        0x0400
  45#define IEEE80211_FCTL_RETRY            0x0800
  46#define IEEE80211_FCTL_PM               0x1000
  47#define IEEE80211_FCTL_MOREDATA         0x2000
  48#define IEEE80211_FCTL_PROTECTED        0x4000
  49#define IEEE80211_FCTL_ORDER            0x8000
  50
  51#define IEEE80211_SCTL_FRAG             0x000F
  52#define IEEE80211_SCTL_SEQ              0xFFF0
  53
  54#define IEEE80211_FTYPE_MGMT            0x0000
  55#define IEEE80211_FTYPE_CTL             0x0004
  56#define IEEE80211_FTYPE_DATA            0x0008
  57
  58/* management */
  59#define IEEE80211_STYPE_ASSOC_REQ       0x0000
  60#define IEEE80211_STYPE_ASSOC_RESP      0x0010
  61#define IEEE80211_STYPE_REASSOC_REQ     0x0020
  62#define IEEE80211_STYPE_REASSOC_RESP    0x0030
  63#define IEEE80211_STYPE_PROBE_REQ       0x0040
  64#define IEEE80211_STYPE_PROBE_RESP      0x0050
  65#define IEEE80211_STYPE_BEACON          0x0080
  66#define IEEE80211_STYPE_ATIM            0x0090
  67#define IEEE80211_STYPE_DISASSOC        0x00A0
  68#define IEEE80211_STYPE_AUTH            0x00B0
  69#define IEEE80211_STYPE_DEAUTH          0x00C0
  70#define IEEE80211_STYPE_ACTION          0x00D0
  71
  72/* control */
  73#define IEEE80211_STYPE_BACK_REQ        0x0080
  74#define IEEE80211_STYPE_BACK            0x0090
  75#define IEEE80211_STYPE_PSPOLL          0x00A0
  76#define IEEE80211_STYPE_RTS             0x00B0
  77#define IEEE80211_STYPE_CTS             0x00C0
  78#define IEEE80211_STYPE_ACK             0x00D0
  79#define IEEE80211_STYPE_CFEND           0x00E0
  80#define IEEE80211_STYPE_CFENDACK        0x00F0
  81
  82/* data */
  83#define IEEE80211_STYPE_DATA                    0x0000
  84#define IEEE80211_STYPE_DATA_CFACK              0x0010
  85#define IEEE80211_STYPE_DATA_CFPOLL             0x0020
  86#define IEEE80211_STYPE_DATA_CFACKPOLL          0x0030
  87#define IEEE80211_STYPE_NULLFUNC                0x0040
  88#define IEEE80211_STYPE_CFACK                   0x0050
  89#define IEEE80211_STYPE_CFPOLL                  0x0060
  90#define IEEE80211_STYPE_CFACKPOLL               0x0070
  91#define IEEE80211_STYPE_QOS_DATA                0x0080
  92#define IEEE80211_STYPE_QOS_DATA_CFACK          0x0090
  93#define IEEE80211_STYPE_QOS_DATA_CFPOLL         0x00A0
  94#define IEEE80211_STYPE_QOS_DATA_CFACKPOLL      0x00B0
  95#define IEEE80211_STYPE_QOS_NULLFUNC            0x00C0
  96#define IEEE80211_STYPE_QOS_CFACK               0x00D0
  97#define IEEE80211_STYPE_QOS_CFPOLL              0x00E0
  98#define IEEE80211_STYPE_QOS_CFACKPOLL           0x00F0
  99
 100
 101/* miscellaneous IEEE 802.11 constants */
 102#define IEEE80211_MAX_FRAG_THRESHOLD    2352
 103#define IEEE80211_MAX_RTS_THRESHOLD     2353
 104#define IEEE80211_MAX_AID               2007
 105#define IEEE80211_MAX_TIM_LEN           251
 106/* Maximum size for the MA-UNITDATA primitive, 802.11 standard section
 107   6.2.1.1.2.
 108
 109   802.11e clarifies the figure in section 7.1.2. The frame body is
 110   up to 2304 octets long (maximum MSDU size) plus any crypt overhead. */
 111#define IEEE80211_MAX_DATA_LEN          2304
 112/* 30 byte 4 addr hdr, 2 byte QoS, 2304 byte MSDU, 12 byte crypt, 4 byte FCS */
 113#define IEEE80211_MAX_FRAME_LEN         2352
 114
 115#define IEEE80211_MAX_SSID_LEN          32
 116
 117#define IEEE80211_MAX_MESH_ID_LEN       32
 118
 119#define IEEE80211_QOS_CTL_LEN           2
 120/* 1d tag mask */
 121#define IEEE80211_QOS_CTL_TAG1D_MASK            0x0007
 122/* TID mask */
 123#define IEEE80211_QOS_CTL_TID_MASK              0x000f
 124/* EOSP */
 125#define IEEE80211_QOS_CTL_EOSP                  0x0010
 126/* ACK policy */
 127#define IEEE80211_QOS_CTL_ACK_POLICY_NORMAL     0x0000
 128#define IEEE80211_QOS_CTL_ACK_POLICY_NOACK      0x0020
 129#define IEEE80211_QOS_CTL_ACK_POLICY_NO_EXPL    0x0040
 130#define IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK   0x0060
 131/* A-MSDU 802.11n */
 132#define IEEE80211_QOS_CTL_A_MSDU_PRESENT        0x0080
 133
 134/* U-APSD queue for WMM IEs sent by AP */
 135#define IEEE80211_WMM_IE_AP_QOSINFO_UAPSD       (1<<7)
 136#define IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK  0x0f
 137
 138/* U-APSD queues for WMM IEs sent by STA */
 139#define IEEE80211_WMM_IE_STA_QOSINFO_AC_VO      (1<<0)
 140#define IEEE80211_WMM_IE_STA_QOSINFO_AC_VI      (1<<1)
 141#define IEEE80211_WMM_IE_STA_QOSINFO_AC_BK      (1<<2)
 142#define IEEE80211_WMM_IE_STA_QOSINFO_AC_BE      (1<<3)
 143#define IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK    0x0f
 144
 145/* U-APSD max SP length for WMM IEs sent by STA */
 146#define IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL     0x00
 147#define IEEE80211_WMM_IE_STA_QOSINFO_SP_2       0x01
 148#define IEEE80211_WMM_IE_STA_QOSINFO_SP_4       0x02
 149#define IEEE80211_WMM_IE_STA_QOSINFO_SP_6       0x03
 150#define IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK    0x03
 151#define IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT   5
 152
 153#define IEEE80211_HT_CTL_LEN            4
 154
 155struct ieee80211_hdr {
 156        __le16 frame_control;
 157        __le16 duration_id;
 158        u8 addr1[6];
 159        u8 addr2[6];
 160        u8 addr3[6];
 161        __le16 seq_ctrl;
 162        u8 addr4[6];
 163} __attribute__ ((packed));
 164
 165struct ieee80211_hdr_3addr {
 166        __le16 frame_control;
 167        __le16 duration_id;
 168        u8 addr1[6];
 169        u8 addr2[6];
 170        u8 addr3[6];
 171        __le16 seq_ctrl;
 172} __attribute__ ((packed));
 173
 174struct ieee80211_qos_hdr {
 175        __le16 frame_control;
 176        __le16 duration_id;
 177        u8 addr1[6];
 178        u8 addr2[6];
 179        u8 addr3[6];
 180        __le16 seq_ctrl;
 181        __le16 qos_ctrl;
 182} __attribute__ ((packed));
 183
 184/**
 185 * ieee80211_has_tods - check if IEEE80211_FCTL_TODS is set
 186 * @fc: frame control bytes in little-endian byteorder
 187 */
 188static inline int ieee80211_has_tods(__le16 fc)
 189{
 190        return (fc & cpu_to_le16(IEEE80211_FCTL_TODS)) != 0;
 191}
 192
 193/**
 194 * ieee80211_has_fromds - check if IEEE80211_FCTL_FROMDS is set
 195 * @fc: frame control bytes in little-endian byteorder
 196 */
 197static inline int ieee80211_has_fromds(__le16 fc)
 198{
 199        return (fc & cpu_to_le16(IEEE80211_FCTL_FROMDS)) != 0;
 200}
 201
 202/**
 203 * ieee80211_has_a4 - check if IEEE80211_FCTL_TODS and IEEE80211_FCTL_FROMDS are set
 204 * @fc: frame control bytes in little-endian byteorder
 205 */
 206static inline int ieee80211_has_a4(__le16 fc)
 207{
 208        __le16 tmp = cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS);
 209        return (fc & tmp) == tmp;
 210}
 211
 212/**
 213 * ieee80211_has_morefrags - check if IEEE80211_FCTL_MOREFRAGS is set
 214 * @fc: frame control bytes in little-endian byteorder
 215 */
 216static inline int ieee80211_has_morefrags(__le16 fc)
 217{
 218        return (fc & cpu_to_le16(IEEE80211_FCTL_MOREFRAGS)) != 0;
 219}
 220
 221/**
 222 * ieee80211_has_retry - check if IEEE80211_FCTL_RETRY is set
 223 * @fc: frame control bytes in little-endian byteorder
 224 */
 225static inline int ieee80211_has_retry(__le16 fc)
 226{
 227        return (fc & cpu_to_le16(IEEE80211_FCTL_RETRY)) != 0;
 228}
 229
 230/**
 231 * ieee80211_has_pm - check if IEEE80211_FCTL_PM is set
 232 * @fc: frame control bytes in little-endian byteorder
 233 */
 234static inline int ieee80211_has_pm(__le16 fc)
 235{
 236        return (fc & cpu_to_le16(IEEE80211_FCTL_PM)) != 0;
 237}
 238
 239/**
 240 * ieee80211_has_moredata - check if IEEE80211_FCTL_MOREDATA is set
 241 * @fc: frame control bytes in little-endian byteorder
 242 */
 243static inline int ieee80211_has_moredata(__le16 fc)
 244{
 245        return (fc & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) != 0;
 246}
 247
 248/**
 249 * ieee80211_has_protected - check if IEEE80211_FCTL_PROTECTED is set
 250 * @fc: frame control bytes in little-endian byteorder
 251 */
 252static inline int ieee80211_has_protected(__le16 fc)
 253{
 254        return (fc & cpu_to_le16(IEEE80211_FCTL_PROTECTED)) != 0;
 255}
 256
 257/**
 258 * ieee80211_has_order - check if IEEE80211_FCTL_ORDER is set
 259 * @fc: frame control bytes in little-endian byteorder
 260 */
 261static inline int ieee80211_has_order(__le16 fc)
 262{
 263        return (fc & cpu_to_le16(IEEE80211_FCTL_ORDER)) != 0;
 264}
 265
 266/**
 267 * ieee80211_is_mgmt - check if type is IEEE80211_FTYPE_MGMT
 268 * @fc: frame control bytes in little-endian byteorder
 269 */
 270static inline int ieee80211_is_mgmt(__le16 fc)
 271{
 272        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
 273               cpu_to_le16(IEEE80211_FTYPE_MGMT);
 274}
 275
 276/**
 277 * ieee80211_is_ctl - check if type is IEEE80211_FTYPE_CTL
 278 * @fc: frame control bytes in little-endian byteorder
 279 */
 280static inline int ieee80211_is_ctl(__le16 fc)
 281{
 282        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
 283               cpu_to_le16(IEEE80211_FTYPE_CTL);
 284}
 285
 286/**
 287 * ieee80211_is_data - check if type is IEEE80211_FTYPE_DATA
 288 * @fc: frame control bytes in little-endian byteorder
 289 */
 290static inline int ieee80211_is_data(__le16 fc)
 291{
 292        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
 293               cpu_to_le16(IEEE80211_FTYPE_DATA);
 294}
 295
 296/**
 297 * ieee80211_is_data_qos - check if type is IEEE80211_FTYPE_DATA and IEEE80211_STYPE_QOS_DATA is set
 298 * @fc: frame control bytes in little-endian byteorder
 299 */
 300static inline int ieee80211_is_data_qos(__le16 fc)
 301{
 302        /*
 303         * mask with QOS_DATA rather than IEEE80211_FCTL_STYPE as we just need
 304         * to check the one bit
 305         */
 306        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_STYPE_QOS_DATA)) ==
 307               cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_DATA);
 308}
 309
 310/**
 311 * ieee80211_is_data_present - check if type is IEEE80211_FTYPE_DATA and has data
 312 * @fc: frame control bytes in little-endian byteorder
 313 */
 314static inline int ieee80211_is_data_present(__le16 fc)
 315{
 316        /*
 317         * mask with 0x40 and test that that bit is clear to only return true
 318         * for the data-containing substypes.
 319         */
 320        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | 0x40)) ==
 321               cpu_to_le16(IEEE80211_FTYPE_DATA);
 322}
 323
 324/**
 325 * ieee80211_is_assoc_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ASSOC_REQ
 326 * @fc: frame control bytes in little-endian byteorder
 327 */
 328static inline int ieee80211_is_assoc_req(__le16 fc)
 329{
 330        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 331               cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ASSOC_REQ);
 332}
 333
 334/**
 335 * ieee80211_is_assoc_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ASSOC_RESP
 336 * @fc: frame control bytes in little-endian byteorder
 337 */
 338static inline int ieee80211_is_assoc_resp(__le16 fc)
 339{
 340        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 341               cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ASSOC_RESP);
 342}
 343
 344/**
 345 * ieee80211_is_reassoc_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_REASSOC_REQ
 346 * @fc: frame control bytes in little-endian byteorder
 347 */
 348static inline int ieee80211_is_reassoc_req(__le16 fc)
 349{
 350        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 351               cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_REASSOC_REQ);
 352}
 353
 354/**
 355 * ieee80211_is_reassoc_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_REASSOC_RESP
 356 * @fc: frame control bytes in little-endian byteorder
 357 */
 358static inline int ieee80211_is_reassoc_resp(__le16 fc)
 359{
 360        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 361               cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_REASSOC_RESP);
 362}
 363
 364/**
 365 * ieee80211_is_probe_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_PROBE_REQ
 366 * @fc: frame control bytes in little-endian byteorder
 367 */
 368static inline int ieee80211_is_probe_req(__le16 fc)
 369{
 370        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 371               cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_REQ);
 372}
 373
 374/**
 375 * ieee80211_is_probe_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_PROBE_RESP
 376 * @fc: frame control bytes in little-endian byteorder
 377 */
 378static inline int ieee80211_is_probe_resp(__le16 fc)
 379{
 380        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 381               cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_RESP);
 382}
 383
 384/**
 385 * ieee80211_is_beacon - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_BEACON
 386 * @fc: frame control bytes in little-endian byteorder
 387 */
 388static inline int ieee80211_is_beacon(__le16 fc)
 389{
 390        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 391               cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON);
 392}
 393
 394/**
 395 * ieee80211_is_atim - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ATIM
 396 * @fc: frame control bytes in little-endian byteorder
 397 */
 398static inline int ieee80211_is_atim(__le16 fc)
 399{
 400        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 401               cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ATIM);
 402}
 403
 404/**
 405 * ieee80211_is_disassoc - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_DISASSOC
 406 * @fc: frame control bytes in little-endian byteorder
 407 */
 408static inline int ieee80211_is_disassoc(__le16 fc)
 409{
 410        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 411               cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DISASSOC);
 412}
 413
 414/**
 415 * ieee80211_is_auth - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_AUTH
 416 * @fc: frame control bytes in little-endian byteorder
 417 */
 418static inline int ieee80211_is_auth(__le16 fc)
 419{
 420        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 421               cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH);
 422}
 423
 424/**
 425 * ieee80211_is_deauth - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_DEAUTH
 426 * @fc: frame control bytes in little-endian byteorder
 427 */
 428static inline int ieee80211_is_deauth(__le16 fc)
 429{
 430        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 431               cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DEAUTH);
 432}
 433
 434/**
 435 * ieee80211_is_action - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ACTION
 436 * @fc: frame control bytes in little-endian byteorder
 437 */
 438static inline int ieee80211_is_action(__le16 fc)
 439{
 440        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 441               cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION);
 442}
 443
 444/**
 445 * ieee80211_is_back_req - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_BACK_REQ
 446 * @fc: frame control bytes in little-endian byteorder
 447 */
 448static inline int ieee80211_is_back_req(__le16 fc)
 449{
 450        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 451               cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK_REQ);
 452}
 453
 454/**
 455 * ieee80211_is_back - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_BACK
 456 * @fc: frame control bytes in little-endian byteorder
 457 */
 458static inline int ieee80211_is_back(__le16 fc)
 459{
 460        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 461               cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK);
 462}
 463
 464/**
 465 * ieee80211_is_pspoll - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_PSPOLL
 466 * @fc: frame control bytes in little-endian byteorder
 467 */
 468static inline int ieee80211_is_pspoll(__le16 fc)
 469{
 470        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 471               cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
 472}
 473
 474/**
 475 * ieee80211_is_rts - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_RTS
 476 * @fc: frame control bytes in little-endian byteorder
 477 */
 478static inline int ieee80211_is_rts(__le16 fc)
 479{
 480        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 481               cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
 482}
 483
 484/**
 485 * ieee80211_is_cts - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CTS
 486 * @fc: frame control bytes in little-endian byteorder
 487 */
 488static inline int ieee80211_is_cts(__le16 fc)
 489{
 490        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 491               cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
 492}
 493
 494/**
 495 * ieee80211_is_ack - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_ACK
 496 * @fc: frame control bytes in little-endian byteorder
 497 */
 498static inline int ieee80211_is_ack(__le16 fc)
 499{
 500        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 501               cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK);
 502}
 503
 504/**
 505 * ieee80211_is_cfend - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CFEND
 506 * @fc: frame control bytes in little-endian byteorder
 507 */
 508static inline int ieee80211_is_cfend(__le16 fc)
 509{
 510        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 511               cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CFEND);
 512}
 513
 514/**
 515 * ieee80211_is_cfendack - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CFENDACK
 516 * @fc: frame control bytes in little-endian byteorder
 517 */
 518static inline int ieee80211_is_cfendack(__le16 fc)
 519{
 520        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 521               cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CFENDACK);
 522}
 523
 524/**
 525 * ieee80211_is_nullfunc - check if frame is a regular (non-QoS) nullfunc frame
 526 * @fc: frame control bytes in little-endian byteorder
 527 */
 528static inline int ieee80211_is_nullfunc(__le16 fc)
 529{
 530        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 531               cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC);
 532}
 533
 534/**
 535 * ieee80211_is_qos_nullfunc - check if frame is a QoS nullfunc frame
 536 * @fc: frame control bytes in little-endian byteorder
 537 */
 538static inline int ieee80211_is_qos_nullfunc(__le16 fc)
 539{
 540        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 541               cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_NULLFUNC);
 542}
 543
 544struct ieee80211s_hdr {
 545        u8 flags;
 546        u8 ttl;
 547        __le32 seqnum;
 548        u8 eaddr1[6];
 549        u8 eaddr2[6];
 550} __attribute__ ((packed));
 551
 552/* Mesh flags */
 553#define MESH_FLAGS_AE_A4        0x1
 554#define MESH_FLAGS_AE_A5_A6     0x2
 555#define MESH_FLAGS_AE           0x3
 556#define MESH_FLAGS_PS_DEEP      0x4
 557
 558/**
 559 * struct ieee80211_quiet_ie
 560 *
 561 * This structure refers to "Quiet information element"
 562 */
 563struct ieee80211_quiet_ie {
 564        u8 count;
 565        u8 period;
 566        __le16 duration;
 567        __le16 offset;
 568} __attribute__ ((packed));
 569
 570/**
 571 * struct ieee80211_msrment_ie
 572 *
 573 * This structure refers to "Measurement Request/Report information element"
 574 */
 575struct ieee80211_msrment_ie {
 576        u8 token;
 577        u8 mode;
 578        u8 type;
 579        u8 request[0];
 580} __attribute__ ((packed));
 581
 582/**
 583 * struct ieee80211_channel_sw_ie
 584 *
 585 * This structure refers to "Channel Switch Announcement information element"
 586 */
 587struct ieee80211_channel_sw_ie {
 588        u8 mode;
 589        u8 new_ch_num;
 590        u8 count;
 591} __attribute__ ((packed));
 592
 593/**
 594 * struct ieee80211_tim
 595 *
 596 * This structure refers to "Traffic Indication Map information element"
 597 */
 598struct ieee80211_tim_ie {
 599        u8 dtim_count;
 600        u8 dtim_period;
 601        u8 bitmap_ctrl;
 602        /* variable size: 1 - 251 bytes */
 603        u8 virtual_map[1];
 604} __attribute__ ((packed));
 605
 606/**
 607 * struct ieee80211_meshconf_ie
 608 *
 609 * This structure refers to "Mesh Configuration information element"
 610 */
 611struct ieee80211_meshconf_ie {
 612        u8 meshconf_psel;
 613        u8 meshconf_pmetric;
 614        u8 meshconf_congest;
 615        u8 meshconf_synch;
 616        u8 meshconf_auth;
 617        u8 meshconf_form;
 618        u8 meshconf_cap;
 619} __attribute__ ((packed));
 620
 621/**
 622 * struct ieee80211_rann_ie
 623 *
 624 * This structure refers to "Root Announcement information element"
 625 */
 626struct ieee80211_rann_ie {
 627        u8 rann_flags;
 628        u8 rann_hopcount;
 629        u8 rann_ttl;
 630        u8 rann_addr[6];
 631        u32 rann_seq;
 632        u32 rann_metric;
 633} __attribute__ ((packed));
 634
 635#define WLAN_SA_QUERY_TR_ID_LEN 2
 636
 637struct ieee80211_mgmt {
 638        __le16 frame_control;
 639        __le16 duration;
 640        u8 da[6];
 641        u8 sa[6];
 642        u8 bssid[6];
 643        __le16 seq_ctrl;
 644        union {
 645                struct {
 646                        __le16 auth_alg;
 647                        __le16 auth_transaction;
 648                        __le16 status_code;
 649                        /* possibly followed by Challenge text */
 650                        u8 variable[0];
 651                } __attribute__ ((packed)) auth;
 652                struct {
 653                        __le16 reason_code;
 654                } __attribute__ ((packed)) deauth;
 655                struct {
 656                        __le16 capab_info;
 657                        __le16 listen_interval;
 658                        /* followed by SSID and Supported rates */
 659                        u8 variable[0];
 660                } __attribute__ ((packed)) assoc_req;
 661                struct {
 662                        __le16 capab_info;
 663                        __le16 status_code;
 664                        __le16 aid;
 665                        /* followed by Supported rates */
 666                        u8 variable[0];
 667                } __attribute__ ((packed)) assoc_resp, reassoc_resp;
 668                struct {
 669                        __le16 capab_info;
 670                        __le16 listen_interval;
 671                        u8 current_ap[6];
 672                        /* followed by SSID and Supported rates */
 673                        u8 variable[0];
 674                } __attribute__ ((packed)) reassoc_req;
 675                struct {
 676                        __le16 reason_code;
 677                } __attribute__ ((packed)) disassoc;
 678                struct {
 679                        __le64 timestamp;
 680                        __le16 beacon_int;
 681                        __le16 capab_info;
 682                        /* followed by some of SSID, Supported rates,
 683                         * FH Params, DS Params, CF Params, IBSS Params, TIM */
 684                        u8 variable[0];
 685                } __attribute__ ((packed)) beacon;
 686                struct {
 687                        /* only variable items: SSID, Supported rates */
 688                        u8 variable[0];
 689                } __attribute__ ((packed)) probe_req;
 690                struct {
 691                        __le64 timestamp;
 692                        __le16 beacon_int;
 693                        __le16 capab_info;
 694                        /* followed by some of SSID, Supported rates,
 695                         * FH Params, DS Params, CF Params, IBSS Params */
 696                        u8 variable[0];
 697                } __attribute__ ((packed)) probe_resp;
 698                struct {
 699                        u8 category;
 700                        union {
 701                                struct {
 702                                        u8 action_code;
 703                                        u8 dialog_token;
 704                                        u8 status_code;
 705                                        u8 variable[0];
 706                                } __attribute__ ((packed)) wme_action;
 707                                struct{
 708                                        u8 action_code;
 709                                        u8 element_id;
 710                                        u8 length;
 711                                        struct ieee80211_channel_sw_ie sw_elem;
 712                                } __attribute__((packed)) chan_switch;
 713                                struct{
 714                                        u8 action_code;
 715                                        u8 dialog_token;
 716                                        u8 element_id;
 717                                        u8 length;
 718                                        struct ieee80211_msrment_ie msr_elem;
 719                                } __attribute__((packed)) measurement;
 720                                struct{
 721                                        u8 action_code;
 722                                        u8 dialog_token;
 723                                        __le16 capab;
 724                                        __le16 timeout;
 725                                        __le16 start_seq_num;
 726                                } __attribute__((packed)) addba_req;
 727                                struct{
 728                                        u8 action_code;
 729                                        u8 dialog_token;
 730                                        __le16 status;
 731                                        __le16 capab;
 732                                        __le16 timeout;
 733                                } __attribute__((packed)) addba_resp;
 734                                struct{
 735                                        u8 action_code;
 736                                        __le16 params;
 737                                        __le16 reason_code;
 738                                } __attribute__((packed)) delba;
 739                                struct{
 740                                        u8 action_code;
 741                                        /* capab_info for open and confirm,
 742                                         * reason for close
 743                                         */
 744                                        __le16 aux;
 745                                        /* Followed in plink_confirm by status
 746                                         * code, AID and supported rates,
 747                                         * and directly by supported rates in
 748                                         * plink_open and plink_close
 749                                         */
 750                                        u8 variable[0];
 751                                } __attribute__((packed)) plink_action;
 752                                struct{
 753                                        u8 action_code;
 754                                        u8 variable[0];
 755                                } __attribute__((packed)) mesh_action;
 756                                struct {
 757                                        u8 action;
 758                                        u8 trans_id[WLAN_SA_QUERY_TR_ID_LEN];
 759                                } __attribute__ ((packed)) sa_query;
 760                                struct {
 761                                        u8 action;
 762                                        u8 smps_control;
 763                                } __attribute__ ((packed)) ht_smps;
 764                        } u;
 765                } __attribute__ ((packed)) action;
 766        } u;
 767} __attribute__ ((packed));
 768
 769/* mgmt header + 1 byte category code */
 770#define IEEE80211_MIN_ACTION_SIZE offsetof(struct ieee80211_mgmt, u.action.u)
 771
 772
 773/* Management MIC information element (IEEE 802.11w) */
 774struct ieee80211_mmie {
 775        u8 element_id;
 776        u8 length;
 777        __le16 key_id;
 778        u8 sequence_number[6];
 779        u8 mic[8];
 780} __attribute__ ((packed));
 781
 782/* Control frames */
 783struct ieee80211_rts {
 784        __le16 frame_control;
 785        __le16 duration;
 786        u8 ra[6];
 787        u8 ta[6];
 788} __attribute__ ((packed));
 789
 790struct ieee80211_cts {
 791        __le16 frame_control;
 792        __le16 duration;
 793        u8 ra[6];
 794} __attribute__ ((packed));
 795
 796struct ieee80211_pspoll {
 797        __le16 frame_control;
 798        __le16 aid;
 799        u8 bssid[6];
 800        u8 ta[6];
 801} __attribute__ ((packed));
 802
 803/**
 804 * struct ieee80211_bar - HT Block Ack Request
 805 *
 806 * This structure refers to "HT BlockAckReq" as
 807 * described in 802.11n draft section 7.2.1.7.1
 808 */
 809struct ieee80211_bar {
 810        __le16 frame_control;
 811        __le16 duration;
 812        __u8 ra[6];
 813        __u8 ta[6];
 814        __le16 control;
 815        __le16 start_seq_num;
 816} __attribute__((packed));
 817
 818/* 802.11 BAR control masks */
 819#define IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL     0x0000
 820#define IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA  0x0004
 821
 822
 823#define IEEE80211_HT_MCS_MASK_LEN               10
 824
 825/**
 826 * struct ieee80211_mcs_info - MCS information
 827 * @rx_mask: RX mask
 828 * @rx_highest: highest supported RX rate. If set represents
 829 *      the highest supported RX data rate in units of 1 Mbps.
 830 *      If this field is 0 this value should not be used to
 831 *      consider the highest RX data rate supported.
 832 * @tx_params: TX parameters
 833 */
 834struct ieee80211_mcs_info {
 835        u8 rx_mask[IEEE80211_HT_MCS_MASK_LEN];
 836        __le16 rx_highest;
 837        u8 tx_params;
 838        u8 reserved[3];
 839} __attribute__((packed));
 840
 841/* 802.11n HT capability MSC set */
 842#define IEEE80211_HT_MCS_RX_HIGHEST_MASK        0x3ff
 843#define IEEE80211_HT_MCS_TX_DEFINED             0x01
 844#define IEEE80211_HT_MCS_TX_RX_DIFF             0x02
 845/* value 0 == 1 stream etc */
 846#define IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK    0x0C
 847#define IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT   2
 848#define         IEEE80211_HT_MCS_TX_MAX_STREAMS 4
 849#define IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION  0x10
 850
 851/*
 852 * 802.11n D5.0 20.3.5 / 20.6 says:
 853 * - indices 0 to 7 and 32 are single spatial stream
 854 * - 8 to 31 are multiple spatial streams using equal modulation
 855 *   [8..15 for two streams, 16..23 for three and 24..31 for four]
 856 * - remainder are multiple spatial streams using unequal modulation
 857 */
 858#define IEEE80211_HT_MCS_UNEQUAL_MODULATION_START 33
 859#define IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE \
 860        (IEEE80211_HT_MCS_UNEQUAL_MODULATION_START / 8)
 861
 862/**
 863 * struct ieee80211_ht_cap - HT capabilities
 864 *
 865 * This structure is the "HT capabilities element" as
 866 * described in 802.11n D5.0 7.3.2.57
 867 */
 868struct ieee80211_ht_cap {
 869        __le16 cap_info;
 870        u8 ampdu_params_info;
 871
 872        /* 16 bytes MCS information */
 873        struct ieee80211_mcs_info mcs;
 874
 875        __le16 extended_ht_cap_info;
 876        __le32 tx_BF_cap_info;
 877        u8 antenna_selection_info;
 878} __attribute__ ((packed));
 879
 880/* 802.11n HT capabilities masks (for cap_info) */
 881#define IEEE80211_HT_CAP_LDPC_CODING            0x0001
 882#define IEEE80211_HT_CAP_SUP_WIDTH_20_40        0x0002
 883#define IEEE80211_HT_CAP_SM_PS                  0x000C
 884#define         IEEE80211_HT_CAP_SM_PS_SHIFT    2
 885#define IEEE80211_HT_CAP_GRN_FLD                0x0010
 886#define IEEE80211_HT_CAP_SGI_20                 0x0020
 887#define IEEE80211_HT_CAP_SGI_40                 0x0040
 888#define IEEE80211_HT_CAP_TX_STBC                0x0080
 889#define IEEE80211_HT_CAP_RX_STBC                0x0300
 890#define         IEEE80211_HT_CAP_RX_STBC_SHIFT  8
 891#define IEEE80211_HT_CAP_DELAY_BA               0x0400
 892#define IEEE80211_HT_CAP_MAX_AMSDU              0x0800
 893#define IEEE80211_HT_CAP_DSSSCCK40              0x1000
 894#define IEEE80211_HT_CAP_RESERVED               0x2000
 895#define IEEE80211_HT_CAP_40MHZ_INTOLERANT       0x4000
 896#define IEEE80211_HT_CAP_LSIG_TXOP_PROT         0x8000
 897
 898/* 802.11n HT extended capabilities masks (for extended_ht_cap_info) */
 899#define IEEE80211_HT_EXT_CAP_PCO                0x0001
 900#define IEEE80211_HT_EXT_CAP_PCO_TIME           0x0006
 901#define         IEEE80211_HT_EXT_CAP_PCO_TIME_SHIFT     1
 902#define IEEE80211_HT_EXT_CAP_MCS_FB             0x0300
 903#define         IEEE80211_HT_EXT_CAP_MCS_FB_SHIFT       8
 904#define IEEE80211_HT_EXT_CAP_HTC_SUP            0x0400
 905#define IEEE80211_HT_EXT_CAP_RD_RESPONDER       0x0800
 906
 907/* 802.11n HT capability AMPDU settings (for ampdu_params_info) */
 908#define IEEE80211_HT_AMPDU_PARM_FACTOR          0x03
 909#define IEEE80211_HT_AMPDU_PARM_DENSITY         0x1C
 910#define         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT   2
 911
 912/*
 913 * Maximum length of AMPDU that the STA can receive.
 914 * Length = 2 ^ (13 + max_ampdu_length_exp) - 1 (octets)
 915 */
 916enum ieee80211_max_ampdu_length_exp {
 917        IEEE80211_HT_MAX_AMPDU_8K = 0,
 918        IEEE80211_HT_MAX_AMPDU_16K = 1,
 919        IEEE80211_HT_MAX_AMPDU_32K = 2,
 920        IEEE80211_HT_MAX_AMPDU_64K = 3
 921};
 922
 923#define IEEE80211_HT_MAX_AMPDU_FACTOR 13
 924
 925/* Minimum MPDU start spacing */
 926enum ieee80211_min_mpdu_spacing {
 927        IEEE80211_HT_MPDU_DENSITY_NONE = 0,     /* No restriction */
 928        IEEE80211_HT_MPDU_DENSITY_0_25 = 1,     /* 1/4 usec */
 929        IEEE80211_HT_MPDU_DENSITY_0_5 = 2,      /* 1/2 usec */
 930        IEEE80211_HT_MPDU_DENSITY_1 = 3,        /* 1 usec */
 931        IEEE80211_HT_MPDU_DENSITY_2 = 4,        /* 2 usec */
 932        IEEE80211_HT_MPDU_DENSITY_4 = 5,        /* 4 usec */
 933        IEEE80211_HT_MPDU_DENSITY_8 = 6,        /* 8 usec */
 934        IEEE80211_HT_MPDU_DENSITY_16 = 7        /* 16 usec */
 935};
 936
 937/**
 938 * struct ieee80211_ht_info - HT information
 939 *
 940 * This structure is the "HT information element" as
 941 * described in 802.11n D5.0 7.3.2.58
 942 */
 943struct ieee80211_ht_info {
 944        u8 control_chan;
 945        u8 ht_param;
 946        __le16 operation_mode;
 947        __le16 stbc_param;
 948        u8 basic_set[16];
 949} __attribute__ ((packed));
 950
 951/* for ht_param */
 952#define IEEE80211_HT_PARAM_CHA_SEC_OFFSET               0x03
 953#define         IEEE80211_HT_PARAM_CHA_SEC_NONE         0x00
 954#define         IEEE80211_HT_PARAM_CHA_SEC_ABOVE        0x01
 955#define         IEEE80211_HT_PARAM_CHA_SEC_BELOW        0x03
 956#define IEEE80211_HT_PARAM_CHAN_WIDTH_ANY               0x04
 957#define IEEE80211_HT_PARAM_RIFS_MODE                    0x08
 958#define IEEE80211_HT_PARAM_SPSMP_SUPPORT                0x10
 959#define IEEE80211_HT_PARAM_SERV_INTERVAL_GRAN           0xE0
 960
 961/* for operation_mode */
 962#define IEEE80211_HT_OP_MODE_PROTECTION                 0x0003
 963#define         IEEE80211_HT_OP_MODE_PROTECTION_NONE            0
 964#define         IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER       1
 965#define         IEEE80211_HT_OP_MODE_PROTECTION_20MHZ           2
 966#define         IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED     3
 967#define IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT           0x0004
 968#define IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT           0x0010
 969
 970/* for stbc_param */
 971#define IEEE80211_HT_STBC_PARAM_DUAL_BEACON             0x0040
 972#define IEEE80211_HT_STBC_PARAM_DUAL_CTS_PROT           0x0080
 973#define IEEE80211_HT_STBC_PARAM_STBC_BEACON             0x0100
 974#define IEEE80211_HT_STBC_PARAM_LSIG_TXOP_FULLPROT      0x0200
 975#define IEEE80211_HT_STBC_PARAM_PCO_ACTIVE              0x0400
 976#define IEEE80211_HT_STBC_PARAM_PCO_PHASE               0x0800
 977
 978
 979/* block-ack parameters */
 980#define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
 981#define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
 982#define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFC0
 983#define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
 984#define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
 985
 986/*
 987 * A-PMDU buffer sizes
 988 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2)
 989 */
 990#define IEEE80211_MIN_AMPDU_BUF 0x8
 991#define IEEE80211_MAX_AMPDU_BUF 0x40
 992
 993
 994/* Spatial Multiplexing Power Save Modes (for capability) */
 995#define WLAN_HT_CAP_SM_PS_STATIC        0
 996#define WLAN_HT_CAP_SM_PS_DYNAMIC       1
 997#define WLAN_HT_CAP_SM_PS_INVALID       2
 998#define WLAN_HT_CAP_SM_PS_DISABLED      3
 999
1000/* for SM power control field lower two bits */
1001#define WLAN_HT_SMPS_CONTROL_DISABLED   0
1002#define WLAN_HT_SMPS_CONTROL_STATIC     1
1003#define WLAN_HT_SMPS_CONTROL_DYNAMIC    3
1004
1005/* Authentication algorithms */
1006#define WLAN_AUTH_OPEN 0
1007#define WLAN_AUTH_SHARED_KEY 1
1008#define WLAN_AUTH_FT 2
1009#define WLAN_AUTH_SAE 3
1010#define WLAN_AUTH_LEAP 128
1011
1012#define WLAN_AUTH_CHALLENGE_LEN 128
1013
1014#define WLAN_CAPABILITY_ESS             (1<<0)
1015#define WLAN_CAPABILITY_IBSS            (1<<1)
1016
1017/*
1018 * A mesh STA sets the ESS and IBSS capability bits to zero.
1019 * however, this holds true for p2p probe responses (in the p2p_find
1020 * phase) as well.
1021 */
1022#define WLAN_CAPABILITY_IS_STA_BSS(cap) \
1023        (!((cap) & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)))
1024
1025#define WLAN_CAPABILITY_CF_POLLABLE     (1<<2)
1026#define WLAN_CAPABILITY_CF_POLL_REQUEST (1<<3)
1027#define WLAN_CAPABILITY_PRIVACY         (1<<4)
1028#define WLAN_CAPABILITY_SHORT_PREAMBLE  (1<<5)
1029#define WLAN_CAPABILITY_PBCC            (1<<6)
1030#define WLAN_CAPABILITY_CHANNEL_AGILITY (1<<7)
1031
1032/* 802.11h */
1033#define WLAN_CAPABILITY_SPECTRUM_MGMT   (1<<8)
1034#define WLAN_CAPABILITY_QOS             (1<<9)
1035#define WLAN_CAPABILITY_SHORT_SLOT_TIME (1<<10)
1036#define WLAN_CAPABILITY_DSSS_OFDM       (1<<13)
1037/* measurement */
1038#define IEEE80211_SPCT_MSR_RPRT_MODE_LATE       (1<<0)
1039#define IEEE80211_SPCT_MSR_RPRT_MODE_INCAPABLE  (1<<1)
1040#define IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED    (1<<2)
1041
1042#define IEEE80211_SPCT_MSR_RPRT_TYPE_BASIC      0
1043#define IEEE80211_SPCT_MSR_RPRT_TYPE_CCA        1
1044#define IEEE80211_SPCT_MSR_RPRT_TYPE_RPI        2
1045
1046
1047/* 802.11g ERP information element */
1048#define WLAN_ERP_NON_ERP_PRESENT (1<<0)
1049#define WLAN_ERP_USE_PROTECTION (1<<1)
1050#define WLAN_ERP_BARKER_PREAMBLE (1<<2)
1051
1052/* WLAN_ERP_BARKER_PREAMBLE values */
1053enum {
1054        WLAN_ERP_PREAMBLE_SHORT = 0,
1055        WLAN_ERP_PREAMBLE_LONG = 1,
1056};
1057
1058/* Status codes */
1059enum ieee80211_statuscode {
1060        WLAN_STATUS_SUCCESS = 0,
1061        WLAN_STATUS_UNSPECIFIED_FAILURE = 1,
1062        WLAN_STATUS_CAPS_UNSUPPORTED = 10,
1063        WLAN_STATUS_REASSOC_NO_ASSOC = 11,
1064        WLAN_STATUS_ASSOC_DENIED_UNSPEC = 12,
1065        WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG = 13,
1066        WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION = 14,
1067        WLAN_STATUS_CHALLENGE_FAIL = 15,
1068        WLAN_STATUS_AUTH_TIMEOUT = 16,
1069        WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA = 17,
1070        WLAN_STATUS_ASSOC_DENIED_RATES = 18,
1071        /* 802.11b */
1072        WLAN_STATUS_ASSOC_DENIED_NOSHORTPREAMBLE = 19,
1073        WLAN_STATUS_ASSOC_DENIED_NOPBCC = 20,
1074        WLAN_STATUS_ASSOC_DENIED_NOAGILITY = 21,
1075        /* 802.11h */
1076        WLAN_STATUS_ASSOC_DENIED_NOSPECTRUM = 22,
1077        WLAN_STATUS_ASSOC_REJECTED_BAD_POWER = 23,
1078        WLAN_STATUS_ASSOC_REJECTED_BAD_SUPP_CHAN = 24,
1079        /* 802.11g */
1080        WLAN_STATUS_ASSOC_DENIED_NOSHORTTIME = 25,
1081        WLAN_STATUS_ASSOC_DENIED_NODSSSOFDM = 26,
1082        /* 802.11w */
1083        WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY = 30,
1084        WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION = 31,
1085        /* 802.11i */
1086        WLAN_STATUS_INVALID_IE = 40,
1087        WLAN_STATUS_INVALID_GROUP_CIPHER = 41,
1088        WLAN_STATUS_INVALID_PAIRWISE_CIPHER = 42,
1089        WLAN_STATUS_INVALID_AKMP = 43,
1090        WLAN_STATUS_UNSUPP_RSN_VERSION = 44,
1091        WLAN_STATUS_INVALID_RSN_IE_CAP = 45,
1092        WLAN_STATUS_CIPHER_SUITE_REJECTED = 46,
1093        /* 802.11e */
1094        WLAN_STATUS_UNSPECIFIED_QOS = 32,
1095        WLAN_STATUS_ASSOC_DENIED_NOBANDWIDTH = 33,
1096        WLAN_STATUS_ASSOC_DENIED_LOWACK = 34,
1097        WLAN_STATUS_ASSOC_DENIED_UNSUPP_QOS = 35,
1098        WLAN_STATUS_REQUEST_DECLINED = 37,
1099        WLAN_STATUS_INVALID_QOS_PARAM = 38,
1100        WLAN_STATUS_CHANGE_TSPEC = 39,
1101        WLAN_STATUS_WAIT_TS_DELAY = 47,
1102        WLAN_STATUS_NO_DIRECT_LINK = 48,
1103        WLAN_STATUS_STA_NOT_PRESENT = 49,
1104        WLAN_STATUS_STA_NOT_QSTA = 50,
1105        /* 802.11s */
1106        WLAN_STATUS_ANTI_CLOG_REQUIRED = 76,
1107        WLAN_STATUS_FCG_NOT_SUPP = 78,
1108        WLAN_STATUS_STA_NO_TBTT = 78,
1109};
1110
1111
1112/* Reason codes */
1113enum ieee80211_reasoncode {
1114        WLAN_REASON_UNSPECIFIED = 1,
1115        WLAN_REASON_PREV_AUTH_NOT_VALID = 2,
1116        WLAN_REASON_DEAUTH_LEAVING = 3,
1117        WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY = 4,
1118        WLAN_REASON_DISASSOC_AP_BUSY = 5,
1119        WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA = 6,
1120        WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA = 7,
1121        WLAN_REASON_DISASSOC_STA_HAS_LEFT = 8,
1122        WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH = 9,
1123        /* 802.11h */
1124        WLAN_REASON_DISASSOC_BAD_POWER = 10,
1125        WLAN_REASON_DISASSOC_BAD_SUPP_CHAN = 11,
1126        /* 802.11i */
1127        WLAN_REASON_INVALID_IE = 13,
1128        WLAN_REASON_MIC_FAILURE = 14,
1129        WLAN_REASON_4WAY_HANDSHAKE_TIMEOUT = 15,
1130        WLAN_REASON_GROUP_KEY_HANDSHAKE_TIMEOUT = 16,
1131        WLAN_REASON_IE_DIFFERENT = 17,
1132        WLAN_REASON_INVALID_GROUP_CIPHER = 18,
1133        WLAN_REASON_INVALID_PAIRWISE_CIPHER = 19,
1134        WLAN_REASON_INVALID_AKMP = 20,
1135        WLAN_REASON_UNSUPP_RSN_VERSION = 21,
1136        WLAN_REASON_INVALID_RSN_IE_CAP = 22,
1137        WLAN_REASON_IEEE8021X_FAILED = 23,
1138        WLAN_REASON_CIPHER_SUITE_REJECTED = 24,
1139        /* 802.11e */
1140        WLAN_REASON_DISASSOC_UNSPECIFIED_QOS = 32,
1141        WLAN_REASON_DISASSOC_QAP_NO_BANDWIDTH = 33,
1142        WLAN_REASON_DISASSOC_LOW_ACK = 34,
1143        WLAN_REASON_DISASSOC_QAP_EXCEED_TXOP = 35,
1144        WLAN_REASON_QSTA_LEAVE_QBSS = 36,
1145        WLAN_REASON_QSTA_NOT_USE = 37,
1146        WLAN_REASON_QSTA_REQUIRE_SETUP = 38,
1147        WLAN_REASON_QSTA_TIMEOUT = 39,
1148        WLAN_REASON_QSTA_CIPHER_NOT_SUPP = 45,
1149        /* 802.11s */
1150        WLAN_REASON_MESH_PEER_CANCELED = 52,
1151        WLAN_REASON_MESH_MAX_PEERS = 53,
1152        WLAN_REASON_MESH_CONFIG = 54,
1153        WLAN_REASON_MESH_CLOSE = 55,
1154        WLAN_REASON_MESH_MAX_RETRIES = 56,
1155        WLAN_REASON_MESH_CONFIRM_TIMEOUT = 57,
1156        WLAN_REASON_MESH_INVALID_GTK = 58,
1157        WLAN_REASON_MESH_INCONSISTENT_PARAM = 59,
1158        WLAN_REASON_MESH_INVALID_SECURITY = 60,
1159        WLAN_REASON_MESH_PATH_ERROR = 61,
1160        WLAN_REASON_MESH_PATH_NOFORWARD = 62,
1161        WLAN_REASON_MESH_PATH_DEST_UNREACHABLE = 63,
1162        WLAN_REASON_MAC_EXISTS_IN_MBSS = 64,
1163        WLAN_REASON_MESH_CHAN_REGULATORY = 65,
1164        WLAN_REASON_MESH_CHAN = 66,
1165};
1166
1167
1168/* Information Element IDs */
1169enum ieee80211_eid {
1170        WLAN_EID_SSID = 0,
1171        WLAN_EID_SUPP_RATES = 1,
1172        WLAN_EID_FH_PARAMS = 2,
1173        WLAN_EID_DS_PARAMS = 3,
1174        WLAN_EID_CF_PARAMS = 4,
1175        WLAN_EID_TIM = 5,
1176        WLAN_EID_IBSS_PARAMS = 6,
1177        WLAN_EID_CHALLENGE = 16,
1178
1179        WLAN_EID_COUNTRY = 7,
1180        WLAN_EID_HP_PARAMS = 8,
1181        WLAN_EID_HP_TABLE = 9,
1182        WLAN_EID_REQUEST = 10,
1183
1184        WLAN_EID_QBSS_LOAD = 11,
1185        WLAN_EID_EDCA_PARAM_SET = 12,
1186        WLAN_EID_TSPEC = 13,
1187        WLAN_EID_TCLAS = 14,
1188        WLAN_EID_SCHEDULE = 15,
1189        WLAN_EID_TS_DELAY = 43,
1190        WLAN_EID_TCLAS_PROCESSING = 44,
1191        WLAN_EID_QOS_CAPA = 46,
1192        /* 802.11s */
1193        WLAN_EID_MESH_CONFIG = 113,
1194        WLAN_EID_MESH_ID = 114,
1195        WLAN_EID_LINK_METRIC_REPORT = 115,
1196        WLAN_EID_CONGESTION_NOTIFICATION = 116,
1197        /* Note that the Peer Link IE has been replaced with the similar
1198         * Peer Management IE.  We will keep the former definition until mesh
1199         * code is changed to comply with latest 802.11s drafts.
1200         */
1201        WLAN_EID_PEER_LINK = 55,  /* no longer in 802.11s drafts */
1202        WLAN_EID_PEER_MGMT = 117,
1203        WLAN_EID_CHAN_SWITCH_PARAM = 118,
1204        WLAN_EID_MESH_AWAKE_WINDOW = 119,
1205        WLAN_EID_BEACON_TIMING = 120,
1206        WLAN_EID_MCCAOP_SETUP_REQ = 121,
1207        WLAN_EID_MCCAOP_SETUP_RESP = 122,
1208        WLAN_EID_MCCAOP_ADVERT = 123,
1209        WLAN_EID_MCCAOP_TEARDOWN = 124,
1210        WLAN_EID_GANN = 125,
1211        WLAN_EID_RANN = 126,
1212        WLAN_EID_PREQ = 130,
1213        WLAN_EID_PREP = 131,
1214        WLAN_EID_PERR = 132,
1215        WLAN_EID_PXU = 137,
1216        WLAN_EID_PXUC = 138,
1217        WLAN_EID_AUTH_MESH_PEER_EXCH = 139,
1218        WLAN_EID_MIC = 140,
1219
1220        WLAN_EID_PWR_CONSTRAINT = 32,
1221        WLAN_EID_PWR_CAPABILITY = 33,
1222        WLAN_EID_TPC_REQUEST = 34,
1223        WLAN_EID_TPC_REPORT = 35,
1224        WLAN_EID_SUPPORTED_CHANNELS = 36,
1225        WLAN_EID_CHANNEL_SWITCH = 37,
1226        WLAN_EID_MEASURE_REQUEST = 38,
1227        WLAN_EID_MEASURE_REPORT = 39,
1228        WLAN_EID_QUIET = 40,
1229        WLAN_EID_IBSS_DFS = 41,
1230
1231        WLAN_EID_ERP_INFO = 42,
1232        WLAN_EID_EXT_SUPP_RATES = 50,
1233
1234        WLAN_EID_HT_CAPABILITY = 45,
1235        WLAN_EID_HT_INFORMATION = 61,
1236
1237        WLAN_EID_RSN = 48,
1238        WLAN_EID_MMIE = 76,
1239        WLAN_EID_WPA = 221,
1240        WLAN_EID_GENERIC = 221,
1241        WLAN_EID_VENDOR_SPECIFIC = 221,
1242        WLAN_EID_QOS_PARAMETER = 222,
1243
1244        WLAN_EID_AP_CHAN_REPORT = 51,
1245        WLAN_EID_NEIGHBOR_REPORT = 52,
1246        WLAN_EID_RCPI = 53,
1247        WLAN_EID_BSS_AVG_ACCESS_DELAY = 63,
1248        WLAN_EID_ANTENNA_INFO = 64,
1249        WLAN_EID_RSNI = 65,
1250        WLAN_EID_MEASUREMENT_PILOT_TX_INFO = 66,
1251        WLAN_EID_BSS_AVAILABLE_CAPACITY = 67,
1252        WLAN_EID_BSS_AC_ACCESS_DELAY = 68,
1253        WLAN_EID_RRM_ENABLED_CAPABILITIES = 70,
1254        WLAN_EID_MULTIPLE_BSSID = 71,
1255        WLAN_EID_BSS_COEX_2040 = 72,
1256        WLAN_EID_OVERLAP_BSS_SCAN_PARAM = 74,
1257        WLAN_EID_EXT_CAPABILITY = 127,
1258
1259        WLAN_EID_MOBILITY_DOMAIN = 54,
1260        WLAN_EID_FAST_BSS_TRANSITION = 55,
1261        WLAN_EID_TIMEOUT_INTERVAL = 56,
1262        WLAN_EID_RIC_DATA = 57,
1263        WLAN_EID_RIC_DESCRIPTOR = 75,
1264
1265        WLAN_EID_DSE_REGISTERED_LOCATION = 58,
1266        WLAN_EID_SUPPORTED_REGULATORY_CLASSES = 59,
1267        WLAN_EID_EXT_CHANSWITCH_ANN = 60,
1268};
1269
1270/* Action category code */
1271enum ieee80211_category {
1272        WLAN_CATEGORY_SPECTRUM_MGMT = 0,
1273        WLAN_CATEGORY_QOS = 1,
1274        WLAN_CATEGORY_DLS = 2,
1275        WLAN_CATEGORY_BACK = 3,
1276        WLAN_CATEGORY_PUBLIC = 4,
1277        WLAN_CATEGORY_HT = 7,
1278        WLAN_CATEGORY_SA_QUERY = 8,
1279        WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION = 9,
1280        WLAN_CATEGORY_MESH_ACTION = 13,
1281        WLAN_CATEGORY_MULTIHOP_ACTION = 14,
1282        WLAN_CATEGORY_SELF_PROTECTED = 15,
1283        WLAN_CATEGORY_WMM = 17,
1284        /* TODO: remove MESH_PATH_SEL after mesh is updated
1285         * to current 802.11s draft  */
1286        WLAN_CATEGORY_MESH_PATH_SEL = 32,
1287        WLAN_CATEGORY_VENDOR_SPECIFIC_PROTECTED = 126,
1288        WLAN_CATEGORY_VENDOR_SPECIFIC = 127,
1289};
1290
1291/* SPECTRUM_MGMT action code */
1292enum ieee80211_spectrum_mgmt_actioncode {
1293        WLAN_ACTION_SPCT_MSR_REQ = 0,
1294        WLAN_ACTION_SPCT_MSR_RPRT = 1,
1295        WLAN_ACTION_SPCT_TPC_REQ = 2,
1296        WLAN_ACTION_SPCT_TPC_RPRT = 3,
1297        WLAN_ACTION_SPCT_CHL_SWITCH = 4,
1298};
1299
1300/* HT action codes */
1301enum ieee80211_ht_actioncode {
1302        WLAN_HT_ACTION_NOTIFY_CHANWIDTH = 0,
1303        WLAN_HT_ACTION_SMPS = 1,
1304        WLAN_HT_ACTION_PSMP = 2,
1305        WLAN_HT_ACTION_PCO_PHASE = 3,
1306        WLAN_HT_ACTION_CSI = 4,
1307        WLAN_HT_ACTION_NONCOMPRESSED_BF = 5,
1308        WLAN_HT_ACTION_COMPRESSED_BF = 6,
1309        WLAN_HT_ACTION_ASEL_IDX_FEEDBACK = 7,
1310};
1311
1312/* Security key length */
1313enum ieee80211_key_len {
1314        WLAN_KEY_LEN_WEP40 = 5,
1315        WLAN_KEY_LEN_WEP104 = 13,
1316        WLAN_KEY_LEN_CCMP = 16,
1317        WLAN_KEY_LEN_TKIP = 32,
1318        WLAN_KEY_LEN_AES_CMAC = 16,
1319};
1320
1321/**
1322 * enum - mesh path selection protocol identifier
1323 *
1324 * @IEEE80211_PATH_PROTOCOL_HWMP: the default path selection protocol
1325 * @IEEE80211_PATH_PROTOCOL_VENDOR: a vendor specific protocol that will
1326 * be specified in a vendor specific information element
1327 */
1328enum {
1329        IEEE80211_PATH_PROTOCOL_HWMP = 0,
1330        IEEE80211_PATH_PROTOCOL_VENDOR = 255,
1331};
1332
1333/**
1334 * enum - mesh path selection metric identifier
1335 *
1336 * @IEEE80211_PATH_METRIC_AIRTIME: the default path selection metric
1337 * @IEEE80211_PATH_METRIC_VENDOR: a vendor specific metric that will be
1338 * specified in a vendor specific information element
1339 */
1340enum {
1341        IEEE80211_PATH_METRIC_AIRTIME = 0,
1342        IEEE80211_PATH_METRIC_VENDOR = 255,
1343};
1344
1345
1346/*
1347 * IEEE 802.11-2007 7.3.2.9 Country information element
1348 *
1349 * Minimum length is 8 octets, ie len must be evenly
1350 * divisible by 2
1351 */
1352
1353/* Although the spec says 8 I'm seeing 6 in practice */
1354#define IEEE80211_COUNTRY_IE_MIN_LEN    6
1355
1356/* The Country String field of the element shall be 3 octets in length */
1357#define IEEE80211_COUNTRY_STRING_LEN    3
1358
1359/*
1360 * For regulatory extension stuff see IEEE 802.11-2007
1361 * Annex I (page 1141) and Annex J (page 1147). Also
1362 * review 7.3.2.9.
1363 *
1364 * When dot11RegulatoryClassesRequired is true and the
1365 * first_channel/reg_extension_id is >= 201 then the IE
1366 * compromises of the 'ext' struct represented below:
1367 *
1368 *  - Regulatory extension ID - when generating IE this just needs
1369 *    to be monotonically increasing for each triplet passed in
1370 *    the IE
1371 *  - Regulatory class - index into set of rules
1372 *  - Coverage class - index into air propagation time (Table 7-27),
1373 *    in microseconds, you can compute the air propagation time from
1374 *    the index by multiplying by 3, so index 10 yields a propagation
1375 *    of 10 us. Valid values are 0-31, values 32-255 are not defined
1376 *    yet. A value of 0 inicates air propagation of <= 1 us.
1377 *
1378 *  See also Table I.2 for Emission limit sets and table
1379 *  I.3 for Behavior limit sets. Table J.1 indicates how to map
1380 *  a reg_class to an emission limit set and behavior limit set.
1381 */
1382#define IEEE80211_COUNTRY_EXTENSION_ID 201
1383
1384/*
1385 *  Channels numbers in the IE must be monotonically increasing
1386 *  if dot11RegulatoryClassesRequired is not true.
1387 *
1388 *  If dot11RegulatoryClassesRequired is true consecutive
1389 *  subband triplets following a regulatory triplet shall
1390 *  have monotonically increasing first_channel number fields.
1391 *
1392 *  Channel numbers shall not overlap.
1393 *
1394 *  Note that max_power is signed.
1395 */
1396struct ieee80211_country_ie_triplet {
1397        union {
1398                struct {
1399                        u8 first_channel;
1400                        u8 num_channels;
1401                        s8 max_power;
1402                } __attribute__ ((packed)) chans;
1403                struct {
1404                        u8 reg_extension_id;
1405                        u8 reg_class;
1406                        u8 coverage_class;
1407                } __attribute__ ((packed)) ext;
1408        };
1409} __attribute__ ((packed));
1410
1411enum ieee80211_timeout_interval_type {
1412        WLAN_TIMEOUT_REASSOC_DEADLINE = 1 /* 802.11r */,
1413        WLAN_TIMEOUT_KEY_LIFETIME = 2 /* 802.11r */,
1414        WLAN_TIMEOUT_ASSOC_COMEBACK = 3 /* 802.11w */,
1415};
1416
1417/* BACK action code */
1418enum ieee80211_back_actioncode {
1419        WLAN_ACTION_ADDBA_REQ = 0,
1420        WLAN_ACTION_ADDBA_RESP = 1,
1421        WLAN_ACTION_DELBA = 2,
1422};
1423
1424/* BACK (block-ack) parties */
1425enum ieee80211_back_parties {
1426        WLAN_BACK_RECIPIENT = 0,
1427        WLAN_BACK_INITIATOR = 1,
1428};
1429
1430/* SA Query action */
1431enum ieee80211_sa_query_action {
1432        WLAN_ACTION_SA_QUERY_REQUEST = 0,
1433        WLAN_ACTION_SA_QUERY_RESPONSE = 1,
1434};
1435
1436
1437/* cipher suite selectors */
1438#define WLAN_CIPHER_SUITE_USE_GROUP     0x000FAC00
1439#define WLAN_CIPHER_SUITE_WEP40         0x000FAC01
1440#define WLAN_CIPHER_SUITE_TKIP          0x000FAC02
1441/* reserved:                            0x000FAC03 */
1442#define WLAN_CIPHER_SUITE_CCMP          0x000FAC04
1443#define WLAN_CIPHER_SUITE_WEP104        0x000FAC05
1444#define WLAN_CIPHER_SUITE_AES_CMAC      0x000FAC06
1445
1446/* AKM suite selectors */
1447#define WLAN_AKM_SUITE_8021X            0x000FAC01
1448#define WLAN_AKM_SUITE_PSK              0x000FAC02
1449#define WLAN_AKM_SUITE_SAE                      0x000FAC08
1450#define WLAN_AKM_SUITE_FT_OVER_SAE      0x000FAC09
1451
1452#define WLAN_MAX_KEY_LEN                32
1453
1454#define WLAN_PMKID_LEN                  16
1455
1456/*
1457 * WMM/802.11e Tspec Element
1458 */
1459#define IEEE80211_WMM_IE_TSPEC_TID_MASK         0x0F
1460#define IEEE80211_WMM_IE_TSPEC_TID_SHIFT        1
1461
1462enum ieee80211_tspec_status_code {
1463        IEEE80211_TSPEC_STATUS_ADMISS_ACCEPTED = 0,
1464        IEEE80211_TSPEC_STATUS_ADDTS_INVAL_PARAMS = 0x1,
1465};
1466
1467struct ieee80211_tspec_ie {
1468        u8 element_id;
1469        u8 len;
1470        u8 oui[3];
1471        u8 oui_type;
1472        u8 oui_subtype;
1473        u8 version;
1474        __le16 tsinfo;
1475        u8 tsinfo_resvd;
1476        __le16 nominal_msdu;
1477        __le16 max_msdu;
1478        __le32 min_service_int;
1479        __le32 max_service_int;
1480        __le32 inactivity_int;
1481        __le32 suspension_int;
1482        __le32 service_start_time;
1483        __le32 min_data_rate;
1484        __le32 mean_data_rate;
1485        __le32 peak_data_rate;
1486        __le32 max_burst_size;
1487        __le32 delay_bound;
1488        __le32 min_phy_rate;
1489        __le16 sba;
1490        __le16 medium_time;
1491} __packed;
1492
1493/**
1494 * ieee80211_get_qos_ctl - get pointer to qos control bytes
1495 * @hdr: the frame
1496 *
1497 * The qos ctrl bytes come after the frame_control, duration, seq_num
1498 * and 3 or 4 addresses of length ETH_ALEN.
1499 * 3 addr: 2 + 2 + 2 + 3*6 = 24
1500 * 4 addr: 2 + 2 + 2 + 4*6 = 30
1501 */
1502static inline u8 *ieee80211_get_qos_ctl(struct ieee80211_hdr *hdr)
1503{
1504        if (ieee80211_has_a4(hdr->frame_control))
1505                return (u8 *)hdr + 30;
1506        else
1507                return (u8 *)hdr + 24;
1508}
1509
1510/**
1511 * ieee80211_get_SA - get pointer to SA
1512 * @hdr: the frame
1513 *
1514 * Given an 802.11 frame, this function returns the offset
1515 * to the source address (SA). It does not verify that the
1516 * header is long enough to contain the address, and the
1517 * header must be long enough to contain the frame control
1518 * field.
1519 */
1520static inline u8 *ieee80211_get_SA(struct ieee80211_hdr *hdr)
1521{
1522        if (ieee80211_has_a4(hdr->frame_control))
1523                return hdr->addr4;
1524        if (ieee80211_has_fromds(hdr->frame_control))
1525                return hdr->addr3;
1526        return hdr->addr2;
1527}
1528
1529/**
1530 * ieee80211_get_DA - get pointer to DA
1531 * @hdr: the frame
1532 *
1533 * Given an 802.11 frame, this function returns the offset
1534 * to the destination address (DA). It does not verify that
1535 * the header is long enough to contain the address, and the
1536 * header must be long enough to contain the frame control
1537 * field.
1538 */
1539static inline u8 *ieee80211_get_DA(struct ieee80211_hdr *hdr)
1540{
1541        if (ieee80211_has_tods(hdr->frame_control))
1542                return hdr->addr3;
1543        else
1544                return hdr->addr1;
1545}
1546
1547/**
1548 * ieee80211_is_robust_mgmt_frame - check if frame is a robust management frame
1549 * @hdr: the frame (buffer must include at least the first octet of payload)
1550 */
1551static inline bool ieee80211_is_robust_mgmt_frame(struct ieee80211_hdr *hdr)
1552{
1553        if (ieee80211_is_disassoc(hdr->frame_control) ||
1554            ieee80211_is_deauth(hdr->frame_control))
1555                return true;
1556
1557        if (ieee80211_is_action(hdr->frame_control)) {
1558                u8 *category;
1559
1560                /*
1561                 * Action frames, excluding Public Action frames, are Robust
1562                 * Management Frames. However, if we are looking at a Protected
1563                 * frame, skip the check since the data may be encrypted and
1564                 * the frame has already been found to be a Robust Management
1565                 * Frame (by the other end).
1566                 */
1567                if (ieee80211_has_protected(hdr->frame_control))
1568                        return true;
1569                category = ((u8 *) hdr) + 24;
1570                return *category != WLAN_CATEGORY_PUBLIC &&
1571                        *category != WLAN_CATEGORY_HT &&
1572                        *category != WLAN_CATEGORY_SELF_PROTECTED &&
1573                        *category != WLAN_CATEGORY_VENDOR_SPECIFIC;
1574        }
1575
1576        return false;
1577}
1578
1579/**
1580 * ieee80211_fhss_chan_to_freq - get channel frequency
1581 * @channel: the FHSS channel
1582 *
1583 * Convert IEEE802.11 FHSS channel to frequency (MHz)
1584 * Ref IEEE 802.11-2007 section 14.6
1585 */
1586static inline int ieee80211_fhss_chan_to_freq(int channel)
1587{
1588        if ((channel > 1) && (channel < 96))
1589                return channel + 2400;
1590        else
1591                return -1;
1592}
1593
1594/**
1595 * ieee80211_freq_to_fhss_chan - get channel
1596 * @freq: the channels frequency
1597 *
1598 * Convert frequency (MHz) to IEEE802.11 FHSS channel
1599 * Ref IEEE 802.11-2007 section 14.6
1600 */
1601static inline int ieee80211_freq_to_fhss_chan(int freq)
1602{
1603        if ((freq > 2401) && (freq < 2496))
1604                return freq - 2400;
1605        else
1606                return -1;
1607}
1608
1609/**
1610 * ieee80211_dsss_chan_to_freq - get channel center frequency
1611 * @channel: the DSSS channel
1612 *
1613 * Convert IEEE802.11 DSSS channel to the center frequency (MHz).
1614 * Ref IEEE 802.11-2007 section 15.6
1615 */
1616static inline int ieee80211_dsss_chan_to_freq(int channel)
1617{
1618        if ((channel > 0) && (channel < 14))
1619                return 2407 + (channel * 5);
1620        else if (channel == 14)
1621                return 2484;
1622        else
1623                return -1;
1624}
1625
1626/**
1627 * ieee80211_freq_to_dsss_chan - get channel
1628 * @freq: the frequency
1629 *
1630 * Convert frequency (MHz) to IEEE802.11 DSSS channel
1631 * Ref IEEE 802.11-2007 section 15.6
1632 *
1633 * This routine selects the channel with the closest center frequency.
1634 */
1635static inline int ieee80211_freq_to_dsss_chan(int freq)
1636{
1637        if ((freq >= 2410) && (freq < 2475))
1638                return (freq - 2405) / 5;
1639        else if ((freq >= 2482) && (freq < 2487))
1640                return 14;
1641        else
1642                return -1;
1643}
1644
1645/* Convert IEEE802.11 HR DSSS channel to frequency (MHz) and back
1646 * Ref IEEE 802.11-2007 section 18.4.6.2
1647 *
1648 * The channels and frequencies are the same as those defined for DSSS
1649 */
1650#define ieee80211_hr_chan_to_freq(chan) ieee80211_dsss_chan_to_freq(chan)
1651#define ieee80211_freq_to_hr_chan(freq) ieee80211_freq_to_dsss_chan(freq)
1652
1653/* Convert IEEE802.11 ERP channel to frequency (MHz) and back
1654 * Ref IEEE 802.11-2007 section 19.4.2
1655 */
1656#define ieee80211_erp_chan_to_freq(chan) ieee80211_hr_chan_to_freq(chan)
1657#define ieee80211_freq_to_erp_chan(freq) ieee80211_freq_to_hr_chan(freq)
1658
1659/**
1660 * ieee80211_ofdm_chan_to_freq - get channel center frequency
1661 * @s_freq: starting frequency == (dotChannelStartingFactor/2) MHz
1662 * @channel: the OFDM channel
1663 *
1664 * Convert IEEE802.11 OFDM channel to center frequency (MHz)
1665 * Ref IEEE 802.11-2007 section 17.3.8.3.2
1666 */
1667static inline int ieee80211_ofdm_chan_to_freq(int s_freq, int channel)
1668{
1669        if ((channel > 0) && (channel <= 200) &&
1670            (s_freq >= 4000))
1671                return s_freq + (channel * 5);
1672        else
1673                return -1;
1674}
1675
1676/**
1677 * ieee80211_freq_to_ofdm_channel - get channel
1678 * @s_freq: starting frequency == (dotChannelStartingFactor/2) MHz
1679 * @freq: the frequency
1680 *
1681 * Convert frequency (MHz) to IEEE802.11 OFDM channel
1682 * Ref IEEE 802.11-2007 section 17.3.8.3.2
1683 *
1684 * This routine selects the channel with the closest center frequency.
1685 */
1686static inline int ieee80211_freq_to_ofdm_chan(int s_freq, int freq)
1687{
1688        if ((freq > (s_freq + 2)) && (freq <= (s_freq + 1202)) &&
1689            (s_freq >= 4000))
1690                return (freq + 2 - s_freq) / 5;
1691        else
1692                return -1;
1693}
1694
1695/**
1696 * ieee80211_tu_to_usec - convert time units (TU) to microseconds
1697 * @tu: the TUs
1698 */
1699static inline unsigned long ieee80211_tu_to_usec(unsigned long tu)
1700{
1701        return 1024 * tu;
1702}
1703
1704/**
1705 * ieee80211_check_tim - check if AID bit is set in TIM
1706 * @tim: the TIM IE
1707 * @tim_len: length of the TIM IE
1708 * @aid: the AID to look for
1709 */
1710static inline bool ieee80211_check_tim(struct ieee80211_tim_ie *tim,
1711                                       u8 tim_len, u16 aid)
1712{
1713        u8 mask;
1714        u8 index, indexn1, indexn2;
1715
1716        if (unlikely(!tim || tim_len < sizeof(*tim)))
1717                return false;
1718
1719        aid &= 0x3fff;
1720        index = aid / 8;
1721        mask  = 1 << (aid & 7);
1722
1723        indexn1 = tim->bitmap_ctrl & 0xfe;
1724        indexn2 = tim_len + indexn1 - 4;
1725
1726        if (index < indexn1 || index > indexn2)
1727                return false;
1728
1729        index -= indexn1;
1730
1731        return !!(tim->virtual_map[index] & mask);
1732}
1733
1734#endif /* LINUX_IEEE80211_H */
1735
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