include/linux/ieee80211.h

   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 /*
  19  * DS bit usage
  20  *
  21  * TA = transmitter address
  22  * RA = receiver address
  23  * DA = destination address
  24  * SA = source address
  25  *
  26  * ToDS    FromDS  A1(RA)  A2(TA)  A3      A4      Use
  27  * -----------------------------------------------------------------
  28  *  0       0       DA      SA      BSSID   -       IBSS/DLS
  29  *  0       1       DA      BSSID   SA      -       AP -> STA
  30  *  1       0       BSSID   SA      DA      -       AP <- STA
  31  *  1       1       RA      TA      DA      SA      unspecified (WDS)
  32  */
  33
  34 #define FCS_LEN 4
  35
  36 #define IEEE80211_FCTL_VERS             0x0003
  37 #define IEEE80211_FCTL_FTYPE            0x000c
  38 #define IEEE80211_FCTL_STYPE            0x00f0
  39 #define IEEE80211_FCTL_TODS             0x0100
  40 #define IEEE80211_FCTL_FROMDS           0x0200
  41 #define IEEE80211_FCTL_MOREFRAGS        0x0400
  42 #define IEEE80211_FCTL_RETRY            0x0800
  43 #define IEEE80211_FCTL_PM               0x1000
  44 #define IEEE80211_FCTL_MOREDATA         0x2000
  45 #define IEEE80211_FCTL_PROTECTED        0x4000
  46 #define IEEE80211_FCTL_ORDER            0x8000
  47
  48 #define IEEE80211_SCTL_FRAG             0x000F
  49 #define IEEE80211_SCTL_SEQ              0xFFF0
  50
  51 #define IEEE80211_FTYPE_MGMT            0x0000
  52 #define IEEE80211_FTYPE_CTL             0x0004
  53 #define IEEE80211_FTYPE_DATA            0x0008
  54
  55 /* management */
  56 #define IEEE80211_STYPE_ASSOC_REQ       0x0000
  57 #define IEEE80211_STYPE_ASSOC_RESP      0x0010
  58 #define IEEE80211_STYPE_REASSOC_REQ     0x0020
  59 #define IEEE80211_STYPE_REASSOC_RESP    0x0030
  60 #define IEEE80211_STYPE_PROBE_REQ       0x0040
  61 #define IEEE80211_STYPE_PROBE_RESP      0x0050
  62 #define IEEE80211_STYPE_BEACON          0x0080
  63 #define IEEE80211_STYPE_ATIM            0x0090
  64 #define IEEE80211_STYPE_DISASSOC        0x00A0
  65 #define IEEE80211_STYPE_AUTH            0x00B0
  66 #define IEEE80211_STYPE_DEAUTH          0x00C0
  67 #define IEEE80211_STYPE_ACTION          0x00D0
  68
  69 /* control */
  70 #define IEEE80211_STYPE_BACK_REQ        0x0080
  71 #define IEEE80211_STYPE_BACK            0x0090
  72 #define IEEE80211_STYPE_PSPOLL          0x00A0
  73 #define IEEE80211_STYPE_RTS             0x00B0
  74 #define IEEE80211_STYPE_CTS             0x00C0
  75 #define IEEE80211_STYPE_ACK             0x00D0
  76 #define IEEE80211_STYPE_CFEND           0x00E0
  77 #define IEEE80211_STYPE_CFENDACK        0x00F0
  78
  79 /* data */
  80 #define IEEE80211_STYPE_DATA                    0x0000
  81 #define IEEE80211_STYPE_DATA_CFACK              0x0010
  82 #define IEEE80211_STYPE_DATA_CFPOLL             0x0020
  83 #define IEEE80211_STYPE_DATA_CFACKPOLL          0x0030
  84 #define IEEE80211_STYPE_NULLFUNC                0x0040
  85 #define IEEE80211_STYPE_CFACK                   0x0050
  86 #define IEEE80211_STYPE_CFPOLL                  0x0060
  87 #define IEEE80211_STYPE_CFACKPOLL               0x0070
  88 #define IEEE80211_STYPE_QOS_DATA                0x0080
  89 #define IEEE80211_STYPE_QOS_DATA_CFACK          0x0090
  90 #define IEEE80211_STYPE_QOS_DATA_CFPOLL         0x00A0
  91 #define IEEE80211_STYPE_QOS_DATA_CFACKPOLL      0x00B0
  92 #define IEEE80211_STYPE_QOS_NULLFUNC            0x00C0
  93 #define IEEE80211_STYPE_QOS_CFACK               0x00D0
  94 #define IEEE80211_STYPE_QOS_CFPOLL              0x00E0
  95 #define IEEE80211_STYPE_QOS_CFACKPOLL           0x00F0
  96
  97
  98 /* miscellaneous IEEE 802.11 constants */
  99 #define IEEE80211_MAX_FRAG_THRESHOLD    2352
 100 #define IEEE80211_MAX_RTS_THRESHOLD     2353
 101 #define IEEE80211_MAX_AID               2007
 102 #define IEEE80211_MAX_TIM_LEN           251
 103 /* Maximum size for the MA-UNITDATA primitive, 802.11 standard section
 104    6.2.1.1.2.
 105
 106    802.11e clarifies the figure in section 7.1.2. The frame body is
 107    up to 2304 octets long (maximum MSDU size) plus any crypt overhead. */
 108 #define IEEE80211_MAX_DATA_LEN          2304
 109 /* 30 byte 4 addr hdr, 2 byte QoS, 2304 byte MSDU, 12 byte crypt, 4 byte FCS */
 110 #define IEEE80211_MAX_FRAME_LEN         2352
 111
 112 #define IEEE80211_MAX_SSID_LEN          32
 113
 114 #define IEEE80211_MAX_MESH_ID_LEN       32
 115
 116 #define IEEE80211_QOS_CTL_LEN           2
 117 #define IEEE80211_QOS_CTL_TID_MASK      0x000F
 118 #define IEEE80211_QOS_CTL_TAG1D_MASK    0x0007
 119
 120 /* U-APSD queue for WMM IEs sent by AP */
 121 #define IEEE80211_WMM_IE_AP_QOSINFO_UAPSD       (1<<7)
 122
 123 /* U-APSD queues for WMM IEs sent by STA */
 124 #define IEEE80211_WMM_IE_STA_QOSINFO_AC_VO      (1<<0)
 125 #define IEEE80211_WMM_IE_STA_QOSINFO_AC_VI      (1<<1)
 126 #define IEEE80211_WMM_IE_STA_QOSINFO_AC_BK      (1<<2)
 127 #define IEEE80211_WMM_IE_STA_QOSINFO_AC_BE      (1<<3)
 128 #define IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK    0x0f
 129
 130 /* U-APSD max SP length for WMM IEs sent by STA */
 131 #define IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL     0x00
 132 #define IEEE80211_WMM_IE_STA_QOSINFO_SP_2       0x01
 133 #define IEEE80211_WMM_IE_STA_QOSINFO_SP_4       0x02
 134 #define IEEE80211_WMM_IE_STA_QOSINFO_SP_6       0x03
 135 #define IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK    0x03
 136 #define IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT   5
 137
 138 #define IEEE80211_HT_CTL_LEN            4
 139
 140 struct ieee80211_hdr {
 141         __le16 frame_control;
 142         __le16 duration_id;
 143         u8 addr1[6];
 144         u8 addr2[6];
 145         u8 addr3[6];
 146         __le16 seq_ctrl;
 147         u8 addr4[6];
 148 } __attribute__ ((packed));
 149
 150 struct ieee80211_hdr_3addr {
 151         __le16 frame_control;
 152         __le16 duration_id;
 153         u8 addr1[6];
 154         u8 addr2[6];
 155         u8 addr3[6];
 156         __le16 seq_ctrl;
 157 } __attribute__ ((packed));
 158
 159 struct ieee80211_qos_hdr {
 160         __le16 frame_control;
 161         __le16 duration_id;
 162         u8 addr1[6];
 163         u8 addr2[6];
 164         u8 addr3[6];
 165         __le16 seq_ctrl;
 166         __le16 qos_ctrl;
 167 } __attribute__ ((packed));
 168
 169 /**
 170  * ieee80211_has_tods - check if IEEE80211_FCTL_TODS is set
 171  * @fc: frame control bytes in little-endian byteorder
 172  */
 173 static inline int ieee80211_has_tods(__le16 fc)
 174 {
 175         return (fc & cpu_to_le16(IEEE80211_FCTL_TODS)) != 0;
 176 }
 177
 178 /**
 179  * ieee80211_has_fromds - check if IEEE80211_FCTL_FROMDS is set
 180  * @fc: frame control bytes in little-endian byteorder
 181  */
 182 static inline int ieee80211_has_fromds(__le16 fc)
 183 {
 184         return (fc & cpu_to_le16(IEEE80211_FCTL_FROMDS)) != 0;
 185 }
 186
 187 /**
 188  * ieee80211_has_a4 - check if IEEE80211_FCTL_TODS and IEEE80211_FCTL_FROMDS are set
 189  * @fc: frame control bytes in little-endian byteorder
 190  */
 191 static inline int ieee80211_has_a4(__le16 fc)
 192 {
 193         __le16 tmp = cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS);
 194         return (fc & tmp) == tmp;
 195 }
 196
 197 /**
 198  * ieee80211_has_morefrags - check if IEEE80211_FCTL_MOREFRAGS is set
 199  * @fc: frame control bytes in little-endian byteorder
 200  */
 201 static inline int ieee80211_has_morefrags(__le16 fc)
 202 {
 203         return (fc & cpu_to_le16(IEEE80211_FCTL_MOREFRAGS)) != 0;
 204 }
 205
 206 /**
 207  * ieee80211_has_retry - check if IEEE80211_FCTL_RETRY is set
 208  * @fc: frame control bytes in little-endian byteorder
 209  */
 210 static inline int ieee80211_has_retry(__le16 fc)
 211 {
 212         return (fc & cpu_to_le16(IEEE80211_FCTL_RETRY)) != 0;
 213 }
 214
 215 /**
 216  * ieee80211_has_pm - check if IEEE80211_FCTL_PM is set
 217  * @fc: frame control bytes in little-endian byteorder
 218  */
 219 static inline int ieee80211_has_pm(__le16 fc)
 220 {
 221         return (fc & cpu_to_le16(IEEE80211_FCTL_PM)) != 0;
 222 }
 223
 224 /**
 225  * ieee80211_has_moredata - check if IEEE80211_FCTL_MOREDATA is set
 226  * @fc: frame control bytes in little-endian byteorder
 227  */
 228 static inline int ieee80211_has_moredata(__le16 fc)
 229 {
 230         return (fc & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) != 0;
 231 }
 232
 233 /**
 234  * ieee80211_has_protected - check if IEEE80211_FCTL_PROTECTED is set
 235  * @fc: frame control bytes in little-endian byteorder
 236  */
 237 static inline int ieee80211_has_protected(__le16 fc)
 238 {
 239         return (fc & cpu_to_le16(IEEE80211_FCTL_PROTECTED)) != 0;
 240 }
 241
 242 /**
 243  * ieee80211_has_order - check if IEEE80211_FCTL_ORDER is set
 244  * @fc: frame control bytes in little-endian byteorder
 245  */
 246 static inline int ieee80211_has_order(__le16 fc)
 247 {
 248         return (fc & cpu_to_le16(IEEE80211_FCTL_ORDER)) != 0;
 249 }
 250
 251 /**
 252  * ieee80211_is_mgmt - check if type is IEEE80211_FTYPE_MGMT
 253  * @fc: frame control bytes in little-endian byteorder
 254  */
 255 static inline int ieee80211_is_mgmt(__le16 fc)
 256 {
 257         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
 258                cpu_to_le16(IEEE80211_FTYPE_MGMT);
 259 }
 260
 261 /**
 262  * ieee80211_is_ctl - check if type is IEEE80211_FTYPE_CTL
 263  * @fc: frame control bytes in little-endian byteorder
 264  */
 265 static inline int ieee80211_is_ctl(__le16 fc)
 266 {
 267         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
 268                cpu_to_le16(IEEE80211_FTYPE_CTL);
 269 }
 270
 271 /**
 272  * ieee80211_is_data - check if type is IEEE80211_FTYPE_DATA
 273  * @fc: frame control bytes in little-endian byteorder
 274  */
 275 static inline int ieee80211_is_data(__le16 fc)
 276 {
 277         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
 278                cpu_to_le16(IEEE80211_FTYPE_DATA);
 279 }
 280
 281 /**
 282  * ieee80211_is_data_qos - check if type is IEEE80211_FTYPE_DATA and IEEE80211_STYPE_QOS_DATA is set
 283  * @fc: frame control bytes in little-endian byteorder
 284  */
 285 static inline int ieee80211_is_data_qos(__le16 fc)
 286 {
 287         /*
 288          * mask with QOS_DATA rather than IEEE80211_FCTL_STYPE as we just need
 289          * to check the one bit
 290          */
 291         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_STYPE_QOS_DATA)) ==
 292                cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_DATA);
 293 }
 294
 295 /**
 296  * ieee80211_is_data_present - check if type is IEEE80211_FTYPE_DATA and has data
 297  * @fc: frame control bytes in little-endian byteorder
 298  */
 299 static inline int ieee80211_is_data_present(__le16 fc)
 300 {
 301         /*
 302          * mask with 0x40 and test that that bit is clear to only return true
 303          * for the data-containing substypes.
 304          */
 305         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | 0x40)) ==
 306                cpu_to_le16(IEEE80211_FTYPE_DATA);
 307 }
 308
 309 /**
 310  * ieee80211_is_assoc_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ASSOC_REQ
 311  * @fc: frame control bytes in little-endian byteorder
 312  */
 313 static inline int ieee80211_is_assoc_req(__le16 fc)
 314 {
 315         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 316                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ASSOC_REQ);
 317 }
 318
 319 /**
 320  * ieee80211_is_assoc_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ASSOC_RESP
 321  * @fc: frame control bytes in little-endian byteorder
 322  */
 323 static inline int ieee80211_is_assoc_resp(__le16 fc)
 324 {
 325         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 326                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ASSOC_RESP);
 327 }
 328
 329 /**
 330  * ieee80211_is_reassoc_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_REASSOC_REQ
 331  * @fc: frame control bytes in little-endian byteorder
 332  */
 333 static inline int ieee80211_is_reassoc_req(__le16 fc)
 334 {
 335         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 336                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_REASSOC_REQ);
 337 }
 338
 339 /**
 340  * ieee80211_is_reassoc_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_REASSOC_RESP
 341  * @fc: frame control bytes in little-endian byteorder
 342  */
 343 static inline int ieee80211_is_reassoc_resp(__le16 fc)
 344 {
 345         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 346                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_REASSOC_RESP);
 347 }
 348
 349 /**
 350  * ieee80211_is_probe_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_PROBE_REQ
 351  * @fc: frame control bytes in little-endian byteorder
 352  */
 353 static inline int ieee80211_is_probe_req(__le16 fc)
 354 {
 355         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 356                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_REQ);
 357 }
 358
 359 /**
 360  * ieee80211_is_probe_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_PROBE_RESP
 361  * @fc: frame control bytes in little-endian byteorder
 362  */
 363 static inline int ieee80211_is_probe_resp(__le16 fc)
 364 {
 365         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 366                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_RESP);
 367 }
 368
 369 /**
 370  * ieee80211_is_beacon - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_BEACON
 371  * @fc: frame control bytes in little-endian byteorder
 372  */
 373 static inline int ieee80211_is_beacon(__le16 fc)
 374 {
 375         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 376                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON);
 377 }
 378
 379 /**
 380  * ieee80211_is_atim - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ATIM
 381  * @fc: frame control bytes in little-endian byteorder
 382  */
 383 static inline int ieee80211_is_atim(__le16 fc)
 384 {
 385         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 386                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ATIM);
 387 }
 388
 389 /**
 390  * ieee80211_is_disassoc - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_DISASSOC
 391  * @fc: frame control bytes in little-endian byteorder
 392  */
 393 static inline int ieee80211_is_disassoc(__le16 fc)
 394 {
 395         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 396                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DISASSOC);
 397 }
 398
 399 /**
 400  * ieee80211_is_auth - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_AUTH
 401  * @fc: frame control bytes in little-endian byteorder
 402  */
 403 static inline int ieee80211_is_auth(__le16 fc)
 404 {
 405         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 406                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH);
 407 }
 408
 409 /**
 410  * ieee80211_is_deauth - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_DEAUTH
 411  * @fc: frame control bytes in little-endian byteorder
 412  */
 413 static inline int ieee80211_is_deauth(__le16 fc)
 414 {
 415         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 416                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DEAUTH);
 417 }
 418
 419 /**
 420  * ieee80211_is_action - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ACTION
 421  * @fc: frame control bytes in little-endian byteorder
 422  */
 423 static inline int ieee80211_is_action(__le16 fc)
 424 {
 425         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 426                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION);
 427 }
 428
 429 /**
 430  * ieee80211_is_back_req - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_BACK_REQ
 431  * @fc: frame control bytes in little-endian byteorder
 432  */
 433 static inline int ieee80211_is_back_req(__le16 fc)
 434 {
 435         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 436                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK_REQ);
 437 }
 438
 439 /**
 440  * ieee80211_is_back - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_BACK
 441  * @fc: frame control bytes in little-endian byteorder
 442  */
 443 static inline int ieee80211_is_back(__le16 fc)
 444 {
 445         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 446                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK);
 447 }
 448
 449 /**
 450  * ieee80211_is_pspoll - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_PSPOLL
 451  * @fc: frame control bytes in little-endian byteorder
 452  */
 453 static inline int ieee80211_is_pspoll(__le16 fc)
 454 {
 455         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 456                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
 457 }
 458
 459 /**
 460  * ieee80211_is_rts - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_RTS
 461  * @fc: frame control bytes in little-endian byteorder
 462  */
 463 static inline int ieee80211_is_rts(__le16 fc)
 464 {
 465         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 466                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
 467 }
 468
 469 /**
 470  * ieee80211_is_cts - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CTS
 471  * @fc: frame control bytes in little-endian byteorder
 472  */
 473 static inline int ieee80211_is_cts(__le16 fc)
 474 {
 475         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 476                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
 477 }
 478
 479 /**
 480  * ieee80211_is_ack - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_ACK
 481  * @fc: frame control bytes in little-endian byteorder
 482  */
 483 static inline int ieee80211_is_ack(__le16 fc)
 484 {
 485         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 486                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK);
 487 }
 488
 489 /**
 490  * ieee80211_is_cfend - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CFEND
 491  * @fc: frame control bytes in little-endian byteorder
 492  */
 493 static inline int ieee80211_is_cfend(__le16 fc)
 494 {
 495         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 496                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CFEND);
 497 }
 498
 499 /**
 500  * ieee80211_is_cfendack - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CFENDACK
 501  * @fc: frame control bytes in little-endian byteorder
 502  */
 503 static inline int ieee80211_is_cfendack(__le16 fc)
 504 {
 505         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 506                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CFENDACK);
 507 }
 508
 509 /**
 510  * ieee80211_is_nullfunc - check if frame is a regular (non-QoS) nullfunc frame
 511  * @fc: frame control bytes in little-endian byteorder
 512  */
 513 static inline int ieee80211_is_nullfunc(__le16 fc)
 514 {
 515         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 516                cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC);
 517 }
 518
 519 /**
 520  * ieee80211_is_qos_nullfunc - check if frame is a QoS nullfunc frame
 521  * @fc: frame control bytes in little-endian byteorder
 522  */
 523 static inline int ieee80211_is_qos_nullfunc(__le16 fc)
 524 {
 525         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 526                cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_NULLFUNC);
 527 }
 528
 529 struct ieee80211s_hdr {
 530         u8 flags;
 531         u8 ttl;
 532         __le32 seqnum;
 533         u8 eaddr1[6];
 534         u8 eaddr2[6];
 535         u8 eaddr3[6];
 536 } __attribute__ ((packed));
 537
 538 /* Mesh flags */
 539 #define MESH_FLAGS_AE_A4        0x1
 540 #define MESH_FLAGS_AE_A5_A6     0x2
 541 #define MESH_FLAGS_AE           0x3
 542 #define MESH_FLAGS_PS_DEEP      0x4
 543
 544 /**
 545  * struct ieee80211_quiet_ie
 546  *
 547  * This structure refers to "Quiet information element"
 548  */
 549 struct ieee80211_quiet_ie {
 550         u8 count;
 551         u8 period;
 552         __le16 duration;
 553         __le16 offset;
 554 } __attribute__ ((packed));
 555
 556 /**
 557  * struct ieee80211_msrment_ie
 558  *
 559  * This structure refers to "Measurement Request/Report information element"
 560  */
 561 struct ieee80211_msrment_ie {
 562         u8 token;
 563         u8 mode;
 564         u8 type;
 565         u8 request[0];
 566 } __attribute__ ((packed));
 567
 568 /**
 569  * struct ieee80211_channel_sw_ie
 570  *
 571  * This structure refers to "Channel Switch Announcement information element"
 572  */
 573 struct ieee80211_channel_sw_ie {
 574         u8 mode;
 575         u8 new_ch_num;
 576         u8 count;
 577 } __attribute__ ((packed));
 578
 579 /**
 580  * struct ieee80211_tim
 581  *
 582  * This structure refers to "Traffic Indication Map information element"
 583  */
 584 struct ieee80211_tim_ie {
 585         u8 dtim_count;
 586         u8 dtim_period;
 587         u8 bitmap_ctrl;
 588         /* variable size: 1 - 251 bytes */
 589         u8 virtual_map[1];
 590 } __attribute__ ((packed));
 591
 592 /**
 593  * struct ieee80211_meshconf_ie
 594  *
 595  * This structure refers to "Mesh Configuration information element"
 596  */
 597 struct ieee80211_meshconf_ie {
 598         u8 meshconf_psel;
 599         u8 meshconf_pmetric;
 600         u8 meshconf_congest;
 601         u8 meshconf_synch;
 602         u8 meshconf_auth;
 603         u8 meshconf_form;
 604         u8 meshconf_cap;
 605 } __attribute__ ((packed));
 606
 607 /**
 608  * struct ieee80211_rann_ie
 609  *
 610  * This structure refers to "Root Announcement information element"
 611  */
 612 struct ieee80211_rann_ie {
 613         u8 rann_flags;
 614         u8 rann_hopcount;
 615         u8 rann_ttl;
 616         u8 rann_addr[6];
 617         u32 rann_seq;
 618         u32 rann_metric;
 619 } __attribute__ ((packed));
 620
 621 #define WLAN_SA_QUERY_TR_ID_LEN 2
 622
 623 struct ieee80211_mgmt {
 624         __le16 frame_control;
 625         __le16 duration;
 626         u8 da[6];
 627         u8 sa[6];
 628         u8 bssid[6];
 629         __le16 seq_ctrl;
 630         union {
 631                 struct {
 632                         __le16 auth_alg;
 633                         __le16 auth_transaction;
 634                         __le16 status_code;
 635                         /* possibly followed by Challenge text */
 636                         u8 variable[0];
 637                 } __attribute__ ((packed)) auth;
 638                 struct {
 639                         __le16 reason_code;
 640                 } __attribute__ ((packed)) deauth;
 641                 struct {
 642                         __le16 capab_info;
 643                         __le16 listen_interval;
 644                         /* followed by SSID and Supported rates */
 645                         u8 variable[0];
 646                 } __attribute__ ((packed)) assoc_req;
 647                 struct {
 648                         __le16 capab_info;
 649                         __le16 status_code;
 650                         __le16 aid;
 651                         /* followed by Supported rates */
 652                         u8 variable[0];
 653                 } __attribute__ ((packed)) assoc_resp, reassoc_resp;
 654                 struct {
 655                         __le16 capab_info;
 656                         __le16 listen_interval;
 657                         u8 current_ap[6];
 658                         /* followed by SSID and Supported rates */
 659                         u8 variable[0];
 660                 } __attribute__ ((packed)) reassoc_req;
 661                 struct {
 662                         __le16 reason_code;
 663                 } __attribute__ ((packed)) disassoc;
 664                 struct {
 665                         __le64 timestamp;
 666                         __le16 beacon_int;
 667                         __le16 capab_info;
 668                         /* followed by some of SSID, Supported rates,
 669                          * FH Params, DS Params, CF Params, IBSS Params, TIM */
 670                         u8 variable[0];
 671                 } __attribute__ ((packed)) beacon;
 672                 struct {
 673                         /* only variable items: SSID, Supported rates */
 674                         u8 variable[0];
 675                 } __attribute__ ((packed)) probe_req;
 676                 struct {
 677                         __le64 timestamp;
 678                         __le16 beacon_int;
 679                         __le16 capab_info;
 680                         /* followed by some of SSID, Supported rates,
 681                          * FH Params, DS Params, CF Params, IBSS Params */
 682                         u8 variable[0];
 683                 } __attribute__ ((packed)) probe_resp;
 684                 struct {
 685                         u8 category;
 686                         union {
 687                                 struct {
 688                                         u8 action_code;
 689                                         u8 dialog_token;
 690                                         u8 status_code;
 691                                         u8 variable[0];
 692                                 } __attribute__ ((packed)) wme_action;
 693                                 struct{
 694                                         u8 action_code;
 695                                         u8 element_id;
 696                                         u8 length;
 697                                         struct ieee80211_channel_sw_ie sw_elem;
 698                                 } __attribute__((packed)) chan_switch;
 699                                 struct{
 700                                         u8 action_code;
 701                                         u8 dialog_token;
 702                                         u8 element_id;
 703                                         u8 length;
 704                                         struct ieee80211_msrment_ie msr_elem;
 705                                 } __attribute__((packed)) measurement;
 706                                 struct{
 707                                         u8 action_code;
 708                                         u8 dialog_token;
 709                                         __le16 capab;
 710                                         __le16 timeout;
 711                                         __le16 start_seq_num;
 712                                 } __attribute__((packed)) addba_req;
 713                                 struct{
 714                                         u8 action_code;
 715                                         u8 dialog_token;
 716                                         __le16 status;
 717                                         __le16 capab;
 718                                         __le16 timeout;
 719                                 } __attribute__((packed)) addba_resp;
 720                                 struct{
 721                                         u8 action_code;
 722                                         __le16 params;
 723                                         __le16 reason_code;
 724                                 } __attribute__((packed)) delba;
 725                                 struct{
 726                                         u8 action_code;
 727                                         /* capab_info for open and confirm,
 728                                          * reason for close
 729                                          */
 730                                         __le16 aux;
 731                                         /* Followed in plink_confirm by status
 732                                          * code, AID and supported rates,
 733                                          * and directly by supported rates in
 734                                          * plink_open and plink_close
 735                                          */
 736                                         u8 variable[0];
 737                                 } __attribute__((packed)) plink_action;
 738                                 struct{
 739                                         u8 action_code;
 740                                         u8 variable[0];
 741                                 } __attribute__((packed)) mesh_action;
 742                                 struct {
 743                                         u8 action;
 744                                         u8 trans_id[WLAN_SA_QUERY_TR_ID_LEN];
 745                                 } __attribute__ ((packed)) sa_query;
 746                                 struct {
 747                                         u8 action;
 748                                         u8 smps_control;
 749                                 } __attribute__ ((packed)) ht_smps;
 750                         } u;
 751                 } __attribute__ ((packed)) action;
 752         } u;
 753 } __attribute__ ((packed));
 754
 755 /* mgmt header + 1 byte category code */
 756 #define IEEE80211_MIN_ACTION_SIZE offsetof(struct ieee80211_mgmt, u.action.u)
 757
 758
 759 /* Management MIC information element (IEEE 802.11w) */
 760 struct ieee80211_mmie {
 761         u8 element_id;
 762         u8 length;
 763         __le16 key_id;
 764         u8 sequence_number[6];
 765         u8 mic[8];
 766 } __attribute__ ((packed));
 767
 768 /* Control frames */
 769 struct ieee80211_rts {
 770         __le16 frame_control;
 771         __le16 duration;
 772         u8 ra[6];
 773         u8 ta[6];
 774 } __attribute__ ((packed));
 775
 776 struct ieee80211_cts {
 777         __le16 frame_control;
 778         __le16 duration;
 779         u8 ra[6];
 780 } __attribute__ ((packed));
 781
 782 struct ieee80211_pspoll {
 783         __le16 frame_control;
 784         __le16 aid;
 785         u8 bssid[6];
 786         u8 ta[6];
 787 } __attribute__ ((packed));
 788
 789 /**
 790  * struct ieee80211_bar - HT Block Ack Request
 791  *
 792  * This structure refers to "HT BlockAckReq" as
 793  * described in 802.11n draft section 7.2.1.7.1
 794  */
 795 struct ieee80211_bar {
 796         __le16 frame_control;
 797         __le16 duration;
 798         __u8 ra[6];
 799         __u8 ta[6];
 800         __le16 control;
 801         __le16 start_seq_num;
 802 } __attribute__((packed)) __aligned(4);
 803
 804 /* 802.11 BA(R) control masks */
 805 #define IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL     0x0000
 806 #define IEEE80211_BAR_CTRL_MULTI_TID             0x0002
 807 #define IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA  0x0004
 808
 809 /**
 810  * struct ieee80211_ba - HT Block Ack
 811  *
 812  * This structure refers to "HT BlockAck" as
 813  * described in 802.11n draft section 7.2.1.8.1
 814  */
 815 struct ieee80211_ba {
 816         __le16 frame_control;
 817         __le16 duration;
 818         u8 ra[6];
 819         u8 ta[6];
 820         __le16 control;
 821
 822         __le16 start_seq_num;
 823         u8 bitmap[8];
 824 } __attribute__((packed));
 825
 826 #define IEEE80211_HT_MCS_MASK_LEN               10
 827
 828 /**
 829  * struct ieee80211_mcs_info - MCS information
 830  * @rx_mask: RX mask
 831  * @rx_highest: highest supported RX rate. If set represents
 832  *      the highest supported RX data rate in units of 1 Mbps.
 833  *      If this field is 0 this value should not be used to
 834  *      consider the highest RX data rate supported.
 835  * @tx_params: TX parameters
 836  */
 837 struct ieee80211_mcs_info {
 838         u8 rx_mask[IEEE80211_HT_MCS_MASK_LEN];
 839         __le16 rx_highest;
 840         u8 tx_params;
 841         u8 reserved[3];
 842 } __attribute__((packed));
 843
 844 /* 802.11n HT capability MSC set */
 845 #define IEEE80211_HT_MCS_RX_HIGHEST_MASK        0x3ff
 846 #define IEEE80211_HT_MCS_TX_DEFINED             0x01
 847 #define IEEE80211_HT_MCS_TX_RX_DIFF             0x02
 848 /* value 0 == 1 stream etc */
 849 #define IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK    0x0C
 850 #define IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT   2
 851 #define         IEEE80211_HT_MCS_TX_MAX_STREAMS 4
 852 #define IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION  0x10
 853
 854 /*
 855  * 802.11n D5.0 20.3.5 / 20.6 says:
 856  * - indices 0 to 7 and 32 are single spatial stream
 857  * - 8 to 31 are multiple spatial streams using equal modulation
 858  *   [8..15 for two streams, 16..23 for three and 24..31 for four]
 859  * - remainder are multiple spatial streams using unequal modulation
 860  */
 861 #define IEEE80211_HT_MCS_UNEQUAL_MODULATION_START 33
 862 #define IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE \
 863         (IEEE80211_HT_MCS_UNEQUAL_MODULATION_START / 8)
 864
 865 /**
 866  * struct ieee80211_ht_cap - HT capabilities
 867  *
 868  * This structure is the "HT capabilities element" as
 869  * described in 802.11n D5.0 7.3.2.57
 870  */
 871 struct ieee80211_ht_cap {
 872         __le16 cap_info;
 873         u8 ampdu_params_info;
 874
 875         /* 16 bytes MCS information */
 876         struct ieee80211_mcs_info mcs;
 877
 878         __le16 extended_ht_cap_info;
 879         __le32 tx_BF_cap_info;
 880         u8 antenna_selection_info;
 881 } __attribute__ ((packed));
 882
 883 /* 802.11n HT capabilities masks (for cap_info) */
 884 #define IEEE80211_HT_CAP_LDPC_CODING            0x0001
 885 #define IEEE80211_HT_CAP_SUP_WIDTH_20_40        0x0002
 886 #define IEEE80211_HT_CAP_SM_PS                  0x000C
 887 #define         IEEE80211_HT_CAP_SM_PS_SHIFT    2
 888 #define IEEE80211_HT_CAP_GRN_FLD                0x0010
 889 #define IEEE80211_HT_CAP_SGI_20                 0x0020
 890 #define IEEE80211_HT_CAP_SGI_40                 0x0040
 891 #define IEEE80211_HT_CAP_TX_STBC                0x0080
 892 #define IEEE80211_HT_CAP_RX_STBC                0x0300
 893 #define         IEEE80211_HT_CAP_RX_STBC_SHIFT  8
 894 #define IEEE80211_HT_CAP_DELAY_BA               0x0400
 895 #define IEEE80211_HT_CAP_MAX_AMSDU              0x0800
 896 #define IEEE80211_HT_CAP_DSSSCCK40              0x1000
 897 #define IEEE80211_HT_CAP_RESERVED               0x2000
 898 #define IEEE80211_HT_CAP_40MHZ_INTOLERANT       0x4000
 899 #define IEEE80211_HT_CAP_LSIG_TXOP_PROT         0x8000
 900
 901 /* 802.11n HT capability AMPDU settings (for ampdu_params_info) */
 902 #define IEEE80211_HT_AMPDU_PARM_FACTOR          0x03
 903 #define IEEE80211_HT_AMPDU_PARM_DENSITY         0x1C
 904 #define         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT   2
 905
 906 /*
 907  * Maximum length of AMPDU that the STA can receive.
 908  * Length = 2 ^ (13 + max_ampdu_length_exp) - 1 (octets)
 909  */
 910 enum ieee80211_max_ampdu_length_exp {
 911         IEEE80211_HT_MAX_AMPDU_8K = 0,
 912         IEEE80211_HT_MAX_AMPDU_16K = 1,
 913         IEEE80211_HT_MAX_AMPDU_32K = 2,
 914         IEEE80211_HT_MAX_AMPDU_64K = 3
 915 };
 916
 917 #define IEEE80211_HT_MAX_AMPDU_FACTOR 13
 918
 919 /* Minimum MPDU start spacing */
 920 enum ieee80211_min_mpdu_spacing {
 921         IEEE80211_HT_MPDU_DENSITY_NONE = 0,     /* No restriction */
 922         IEEE80211_HT_MPDU_DENSITY_0_25 = 1,     /* 1/4 usec */
 923         IEEE80211_HT_MPDU_DENSITY_0_5 = 2,      /* 1/2 usec */
 924         IEEE80211_HT_MPDU_DENSITY_1 = 3,        /* 1 usec */
 925         IEEE80211_HT_MPDU_DENSITY_2 = 4,        /* 2 usec */
 926         IEEE80211_HT_MPDU_DENSITY_4 = 5,        /* 4 usec */
 927         IEEE80211_HT_MPDU_DENSITY_8 = 6,        /* 8 usec */
 928         IEEE80211_HT_MPDU_DENSITY_16 = 7        /* 16 usec */
 929 };
 930
 931 /**
 932  * struct ieee80211_ht_info - HT information
 933  *
 934  * This structure is the "HT information element" as
 935  * described in 802.11n D5.0 7.3.2.58
 936  */
 937 struct ieee80211_ht_info {
 938         u8 control_chan;
 939         u8 ht_param;
 940         __le16 operation_mode;
 941         __le16 stbc_param;
 942         u8 basic_set[16];
 943 } __attribute__ ((packed));
 944
 945 /* for ht_param */
 946 #define IEEE80211_HT_PARAM_CHA_SEC_OFFSET               0x03
 947 #define         IEEE80211_HT_PARAM_CHA_SEC_NONE         0x00
 948 #define         IEEE80211_HT_PARAM_CHA_SEC_ABOVE        0x01
 949 #define         IEEE80211_HT_PARAM_CHA_SEC_BELOW        0x03
 950 #define IEEE80211_HT_PARAM_CHAN_WIDTH_ANY               0x04
 951 #define IEEE80211_HT_PARAM_RIFS_MODE                    0x08
 952 #define IEEE80211_HT_PARAM_SPSMP_SUPPORT                0x10
 953 #define IEEE80211_HT_PARAM_SERV_INTERVAL_GRAN           0xE0
 954
 955 /* for operation_mode */
 956 #define IEEE80211_HT_OP_MODE_PROTECTION                 0x0003
 957 #define         IEEE80211_HT_OP_MODE_PROTECTION_NONE            0
 958 #define         IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER       1
 959 #define         IEEE80211_HT_OP_MODE_PROTECTION_20MHZ           2
 960 #define         IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED     3
 961 #define IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT           0x0004
 962 #define IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT           0x0010
 963
 964 /* for stbc_param */
 965 #define IEEE80211_HT_STBC_PARAM_DUAL_BEACON             0x0040
 966 #define IEEE80211_HT_STBC_PARAM_DUAL_CTS_PROT           0x0080
 967 #define IEEE80211_HT_STBC_PARAM_STBC_BEACON             0x0100
 968 #define IEEE80211_HT_STBC_PARAM_LSIG_TXOP_FULLPROT      0x0200
 969 #define IEEE80211_HT_STBC_PARAM_PCO_ACTIVE              0x0400
 970 #define IEEE80211_HT_STBC_PARAM_PCO_PHASE               0x0800
 971
 972
 973 /* block-ack parameters */
 974 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
 975 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
 976 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
 977 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
 978 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
 979
 980 /*
 981  * A-PMDU buffer sizes
 982  * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2)
 983  */
 984 #define IEEE80211_MIN_AMPDU_BUF 0x8
 985 #define IEEE80211_MAX_AMPDU_BUF 0x40
 986
 987
 988 /* Spatial Multiplexing Power Save Modes (for capability) */
 989 #define WLAN_HT_CAP_SM_PS_STATIC        0
 990 #define WLAN_HT_CAP_SM_PS_DYNAMIC       1
 991 #define WLAN_HT_CAP_SM_PS_INVALID       2
 992 #define WLAN_HT_CAP_SM_PS_DISABLED      3
 993
 994 /* for SM power control field lower two bits */
 995 #define WLAN_HT_SMPS_CONTROL_DISABLED   0
 996 #define WLAN_HT_SMPS_CONTROL_STATIC     1
 997 #define WLAN_HT_SMPS_CONTROL_DYNAMIC    3
 998
 999 /* Authentication algorithms */
1000 #define WLAN_AUTH_OPEN 0
1001 #define WLAN_AUTH_SHARED_KEY 1
1002 #define WLAN_AUTH_FT 2
1003 #define WLAN_AUTH_SAE 3
1004 #define WLAN_AUTH_LEAP 128
1005
1006 #define WLAN_AUTH_CHALLENGE_LEN 128
1007
1008 #define WLAN_CAPABILITY_ESS             (1<<0)
1009 #define WLAN_CAPABILITY_IBSS            (1<<1)
1010 #define WLAN_CAPABILITY_CF_POLLABLE     (1<<2)
1011 #define WLAN_CAPABILITY_CF_POLL_REQUEST (1<<3)
1012 #define WLAN_CAPABILITY_PRIVACY         (1<<4)
1013 #define WLAN_CAPABILITY_SHORT_PREAMBLE  (1<<5)
1014 #define WLAN_CAPABILITY_PBCC            (1<<6)
1015 #define WLAN_CAPABILITY_CHANNEL_AGILITY (1<<7)
1016
1017 /* 802.11h */
1018 #define WLAN_CAPABILITY_SPECTRUM_MGMT   (1<<8)
1019 #define WLAN_CAPABILITY_QOS             (1<<9)
1020 #define WLAN_CAPABILITY_SHORT_SLOT_TIME (1<<10)
1021 #define WLAN_CAPABILITY_DSSS_OFDM       (1<<13)
1022 /* measurement */
1023 #define IEEE80211_SPCT_MSR_RPRT_MODE_LATE       (1<<0)
1024 #define IEEE80211_SPCT_MSR_RPRT_MODE_INCAPABLE  (1<<1)
1025 #define IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED    (1<<2)
1026
1027 #define IEEE80211_SPCT_MSR_RPRT_TYPE_BASIC      0
1028 #define IEEE80211_SPCT_MSR_RPRT_TYPE_CCA        1
1029 #define IEEE80211_SPCT_MSR_RPRT_TYPE_RPI        2
1030
1031
1032 /* 802.11g ERP information element */
1033 #define WLAN_ERP_NON_ERP_PRESENT (1<<0)
1034 #define WLAN_ERP_USE_PROTECTION (1<<1)
1035 #define WLAN_ERP_BARKER_PREAMBLE (1<<2)
1036
1037 /* WLAN_ERP_BARKER_PREAMBLE values */
1038 enum {
1039         WLAN_ERP_PREAMBLE_SHORT = 0,
1040         WLAN_ERP_PREAMBLE_LONG = 1,
1041 };
1042
1043 /* Status codes */
1044 enum ieee80211_statuscode {
1045         WLAN_STATUS_SUCCESS = 0,
1046         WLAN_STATUS_UNSPECIFIED_FAILURE = 1,
1047         WLAN_STATUS_CAPS_UNSUPPORTED = 10,
1048         WLAN_STATUS_REASSOC_NO_ASSOC = 11,
1049         WLAN_STATUS_ASSOC_DENIED_UNSPEC = 12,
1050         WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG = 13,
1051         WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION = 14,
1052         WLAN_STATUS_CHALLENGE_FAIL = 15,
1053         WLAN_STATUS_AUTH_TIMEOUT = 16,
1054         WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA = 17,
1055         WLAN_STATUS_ASSOC_DENIED_RATES = 18,
1056         /* 802.11b */
1057         WLAN_STATUS_ASSOC_DENIED_NOSHORTPREAMBLE = 19,
1058         WLAN_STATUS_ASSOC_DENIED_NOPBCC = 20,
1059         WLAN_STATUS_ASSOC_DENIED_NOAGILITY = 21,
1060         /* 802.11h */
1061         WLAN_STATUS_ASSOC_DENIED_NOSPECTRUM = 22,
1062         WLAN_STATUS_ASSOC_REJECTED_BAD_POWER = 23,
1063         WLAN_STATUS_ASSOC_REJECTED_BAD_SUPP_CHAN = 24,
1064         /* 802.11g */
1065         WLAN_STATUS_ASSOC_DENIED_NOSHORTTIME = 25,
1066         WLAN_STATUS_ASSOC_DENIED_NODSSSOFDM = 26,
1067         /* 802.11w */
1068         WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY = 30,
1069         WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION = 31,
1070         /* 802.11i */
1071         WLAN_STATUS_INVALID_IE = 40,
1072         WLAN_STATUS_INVALID_GROUP_CIPHER = 41,
1073         WLAN_STATUS_INVALID_PAIRWISE_CIPHER = 42,
1074         WLAN_STATUS_INVALID_AKMP = 43,
1075         WLAN_STATUS_UNSUPP_RSN_VERSION = 44,
1076         WLAN_STATUS_INVALID_RSN_IE_CAP = 45,
1077         WLAN_STATUS_CIPHER_SUITE_REJECTED = 46,
1078         /* 802.11e */
1079         WLAN_STATUS_UNSPECIFIED_QOS = 32,
1080         WLAN_STATUS_ASSOC_DENIED_NOBANDWIDTH = 33,
1081         WLAN_STATUS_ASSOC_DENIED_LOWACK = 34,
1082         WLAN_STATUS_ASSOC_DENIED_UNSUPP_QOS = 35,
1083         WLAN_STATUS_REQUEST_DECLINED = 37,
1084         WLAN_STATUS_INVALID_QOS_PARAM = 38,
1085         WLAN_STATUS_CHANGE_TSPEC = 39,
1086         WLAN_STATUS_WAIT_TS_DELAY = 47,
1087         WLAN_STATUS_NO_DIRECT_LINK = 48,
1088         WLAN_STATUS_STA_NOT_PRESENT = 49,
1089         WLAN_STATUS_STA_NOT_QSTA = 50,
1090         /* 802.11s */
1091         WLAN_STATUS_ANTI_CLOG_REQUIRED = 76,
1092         WLAN_STATUS_FCG_NOT_SUPP = 78,
1093         WLAN_STATUS_STA_NO_TBTT = 78,
1094 };
1095
1096
1097 /* Reason codes */
1098 enum ieee80211_reasoncode {
1099         WLAN_REASON_UNSPECIFIED = 1,
1100         WLAN_REASON_PREV_AUTH_NOT_VALID = 2,
1101         WLAN_REASON_DEAUTH_LEAVING = 3,
1102         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY = 4,
1103         WLAN_REASON_DISASSOC_AP_BUSY = 5,
1104         WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA = 6,
1105         WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA = 7,
1106         WLAN_REASON_DISASSOC_STA_HAS_LEFT = 8,
1107         WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH = 9,
1108         /* 802.11h */
1109         WLAN_REASON_DISASSOC_BAD_POWER = 10,
1110         WLAN_REASON_DISASSOC_BAD_SUPP_CHAN = 11,
1111         /* 802.11i */
1112         WLAN_REASON_INVALID_IE = 13,
1113         WLAN_REASON_MIC_FAILURE = 14,
1114         WLAN_REASON_4WAY_HANDSHAKE_TIMEOUT = 15,
1115         WLAN_REASON_GROUP_KEY_HANDSHAKE_TIMEOUT = 16,
1116         WLAN_REASON_IE_DIFFERENT = 17,
1117         WLAN_REASON_INVALID_GROUP_CIPHER = 18,
1118         WLAN_REASON_INVALID_PAIRWISE_CIPHER = 19,
1119         WLAN_REASON_INVALID_AKMP = 20,
1120         WLAN_REASON_UNSUPP_RSN_VERSION = 21,
1121         WLAN_REASON_INVALID_RSN_IE_CAP = 22,
1122         WLAN_REASON_IEEE8021X_FAILED = 23,
1123         WLAN_REASON_CIPHER_SUITE_REJECTED = 24,
1124         /* 802.11e */
1125         WLAN_REASON_DISASSOC_UNSPECIFIED_QOS = 32,
1126         WLAN_REASON_DISASSOC_QAP_NO_BANDWIDTH = 33,
1127         WLAN_REASON_DISASSOC_LOW_ACK = 34,
1128         WLAN_REASON_DISASSOC_QAP_EXCEED_TXOP = 35,
1129         WLAN_REASON_QSTA_LEAVE_QBSS = 36,
1130         WLAN_REASON_QSTA_NOT_USE = 37,
1131         WLAN_REASON_QSTA_REQUIRE_SETUP = 38,
1132         WLAN_REASON_QSTA_TIMEOUT = 39,
1133         WLAN_REASON_QSTA_CIPHER_NOT_SUPP = 45,
1134         /* 802.11s */
1135         WLAN_REASON_MESH_PEER_CANCELED = 52,
1136         WLAN_REASON_MESH_MAX_PEERS = 53,
1137         WLAN_REASON_MESH_CONFIG = 54,
1138         WLAN_REASON_MESH_CLOSE = 55,
1139         WLAN_REASON_MESH_MAX_RETRIES = 56,
1140         WLAN_REASON_MESH_CONFIRM_TIMEOUT = 57,
1141         WLAN_REASON_MESH_INVALID_GTK = 58,
1142         WLAN_REASON_MESH_INCONSISTENT_PARAM = 59,
1143         WLAN_REASON_MESH_INVALID_SECURITY = 60,
1144         WLAN_REASON_MESH_PATH_ERROR = 61,
1145         WLAN_REASON_MESH_PATH_NOFORWARD = 62,
1146         WLAN_REASON_MESH_PATH_DEST_UNREACHABLE = 63,
1147         WLAN_REASON_MAC_EXISTS_IN_MBSS = 64,
1148         WLAN_REASON_MESH_CHAN_REGULATORY = 65,
1149         WLAN_REASON_MESH_CHAN = 66,
1150 };
1151
1152
1153 /* Information Element IDs */
1154 enum ieee80211_eid {
1155         WLAN_EID_SSID = 0,
1156         WLAN_EID_SUPP_RATES = 1,
1157         WLAN_EID_FH_PARAMS = 2,
1158         WLAN_EID_DS_PARAMS = 3,
1159         WLAN_EID_CF_PARAMS = 4,
1160         WLAN_EID_TIM = 5,
1161         WLAN_EID_IBSS_PARAMS = 6,
1162         WLAN_EID_CHALLENGE = 16,
1163
1164         WLAN_EID_COUNTRY = 7,
1165         WLAN_EID_HP_PARAMS = 8,
1166         WLAN_EID_HP_TABLE = 9,
1167         WLAN_EID_REQUEST = 10,
1168
1169         WLAN_EID_QBSS_LOAD = 11,
1170         WLAN_EID_EDCA_PARAM_SET = 12,
1171         WLAN_EID_TSPEC = 13,
1172         WLAN_EID_TCLAS = 14,
1173         WLAN_EID_SCHEDULE = 15,
1174         WLAN_EID_TS_DELAY = 43,
1175         WLAN_EID_TCLAS_PROCESSING = 44,
1176         WLAN_EID_QOS_CAPA = 46,
1177         /* 802.11s */
1178         WLAN_EID_MESH_CONFIG = 113,
1179         WLAN_EID_MESH_ID = 114,
1180         WLAN_EID_LINK_METRIC_REPORT = 115,
1181         WLAN_EID_CONGESTION_NOTIFICATION = 116,
1182         /* Note that the Peer Link IE has been replaced with the similar
1183          * Peer Management IE.  We will keep the former definition until mesh
1184          * code is changed to comply with latest 802.11s drafts.
1185          */
1186         WLAN_EID_PEER_LINK = 55,  /* no longer in 802.11s drafts */
1187         WLAN_EID_PEER_MGMT = 117,
1188         WLAN_EID_CHAN_SWITCH_PARAM = 118,
1189         WLAN_EID_MESH_AWAKE_WINDOW = 119,
1190         WLAN_EID_BEACON_TIMING = 120,
1191         WLAN_EID_MCCAOP_SETUP_REQ = 121,
1192         WLAN_EID_MCCAOP_SETUP_RESP = 122,
1193         WLAN_EID_MCCAOP_ADVERT = 123,
1194         WLAN_EID_MCCAOP_TEARDOWN = 124,
1195         WLAN_EID_GANN = 125,
1196         WLAN_EID_RANN = 126,
1197         WLAN_EID_PREQ = 130,
1198         WLAN_EID_PREP = 131,
1199         WLAN_EID_PERR = 132,
1200         WLAN_EID_PXU = 137,
1201         WLAN_EID_PXUC = 138,
1202         WLAN_EID_AUTH_MESH_PEER_EXCH = 139,
1203         WLAN_EID_MIC = 140,
1204
1205         WLAN_EID_PWR_CONSTRAINT = 32,
1206         WLAN_EID_PWR_CAPABILITY = 33,
1207         WLAN_EID_TPC_REQUEST = 34,
1208         WLAN_EID_TPC_REPORT = 35,
1209         WLAN_EID_SUPPORTED_CHANNELS = 36,
1210         WLAN_EID_CHANNEL_SWITCH = 37,
1211         WLAN_EID_MEASURE_REQUEST = 38,
1212         WLAN_EID_MEASURE_REPORT = 39,
1213         WLAN_EID_QUIET = 40,
1214         WLAN_EID_IBSS_DFS = 41,
1215
1216         WLAN_EID_ERP_INFO = 42,
1217         WLAN_EID_EXT_SUPP_RATES = 50,
1218
1219         WLAN_EID_HT_CAPABILITY = 45,
1220         WLAN_EID_HT_INFORMATION = 61,
1221
1222         WLAN_EID_RSN = 48,
1223         WLAN_EID_MMIE = 76,
1224         WLAN_EID_WPA = 221,
1225         WLAN_EID_GENERIC = 221,
1226         WLAN_EID_VENDOR_SPECIFIC = 221,
1227         WLAN_EID_QOS_PARAMETER = 222,
1228
1229         WLAN_EID_AP_CHAN_REPORT = 51,
1230         WLAN_EID_NEIGHBOR_REPORT = 52,
1231         WLAN_EID_RCPI = 53,
1232         WLAN_EID_BSS_AVG_ACCESS_DELAY = 63,
1233         WLAN_EID_ANTENNA_INFO = 64,
1234         WLAN_EID_RSNI = 65,
1235         WLAN_EID_MEASUREMENT_PILOT_TX_INFO = 66,
1236         WLAN_EID_BSS_AVAILABLE_CAPACITY = 67,
1237         WLAN_EID_BSS_AC_ACCESS_DELAY = 68,
1238         WLAN_EID_RRM_ENABLED_CAPABILITIES = 70,
1239         WLAN_EID_MULTIPLE_BSSID = 71,
1240
1241         WLAN_EID_MOBILITY_DOMAIN = 54,
1242         WLAN_EID_FAST_BSS_TRANSITION = 55,
1243         WLAN_EID_TIMEOUT_INTERVAL = 56,
1244         WLAN_EID_RIC_DATA = 57,
1245         WLAN_EID_RIC_DESCRIPTOR = 75,
1246
1247         WLAN_EID_DSE_REGISTERED_LOCATION = 58,
1248         WLAN_EID_SUPPORTED_REGULATORY_CLASSES = 59,
1249         WLAN_EID_EXT_CHANSWITCH_ANN = 60,
1250 };
1251
1252 /* Action category code */
1253 enum ieee80211_category {
1254         WLAN_CATEGORY_SPECTRUM_MGMT = 0,
1255         WLAN_CATEGORY_QOS = 1,
1256         WLAN_CATEGORY_DLS = 2,
1257         WLAN_CATEGORY_BACK = 3,
1258         WLAN_CATEGORY_PUBLIC = 4,
1259         WLAN_CATEGORY_HT = 7,
1260         WLAN_CATEGORY_SA_QUERY = 8,
1261         WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION = 9,
1262         WLAN_CATEGORY_MESH_ACTION = 13,
1263         WLAN_CATEGORY_MULTIHOP_ACTION = 14,
1264         WLAN_CATEGORY_SELF_PROTECTED = 15,
1265         WLAN_CATEGORY_WMM = 17,
1266         /* TODO: remove MESH_PLINK and MESH_PATH_SEL after */
1267         /*       mesh is updated to current 802.11s draft  */
1268         WLAN_CATEGORY_MESH_PLINK = 30,
1269         WLAN_CATEGORY_MESH_PATH_SEL = 32,
1270         WLAN_CATEGORY_VENDOR_SPECIFIC_PROTECTED = 126,
1271         WLAN_CATEGORY_VENDOR_SPECIFIC = 127,
1272 };
1273
1274 /* SPECTRUM_MGMT action code */
1275 enum ieee80211_spectrum_mgmt_actioncode {
1276         WLAN_ACTION_SPCT_MSR_REQ = 0,
1277         WLAN_ACTION_SPCT_MSR_RPRT = 1,
1278         WLAN_ACTION_SPCT_TPC_REQ = 2,
1279         WLAN_ACTION_SPCT_TPC_RPRT = 3,
1280         WLAN_ACTION_SPCT_CHL_SWITCH = 4,
1281 };
1282
1283 /* HT action codes */
1284 enum ieee80211_ht_actioncode {
1285         WLAN_HT_ACTION_NOTIFY_CHANWIDTH = 0,
1286         WLAN_HT_ACTION_SMPS = 1,
1287         WLAN_HT_ACTION_PSMP = 2,
1288         WLAN_HT_ACTION_PCO_PHASE = 3,
1289         WLAN_HT_ACTION_CSI = 4,
1290         WLAN_HT_ACTION_NONCOMPRESSED_BF = 5,
1291         WLAN_HT_ACTION_COMPRESSED_BF = 6,
1292         WLAN_HT_ACTION_ASEL_IDX_FEEDBACK = 7,
1293 };
1294
1295 /* Security key length */
1296 enum ieee80211_key_len {
1297         WLAN_KEY_LEN_WEP40 = 5,
1298         WLAN_KEY_LEN_WEP104 = 13,
1299         WLAN_KEY_LEN_CCMP = 16,
1300         WLAN_KEY_LEN_TKIP = 32,
1301         WLAN_KEY_LEN_AES_CMAC = 16,
1302 };
1303
1304 /*
1305  * IEEE 802.11-2007 7.3.2.9 Country information element
1306  *
1307  * Minimum length is 8 octets, ie len must be evenly
1308  * divisible by 2
1309  */
1310
1311 /* Although the spec says 8 I'm seeing 6 in practice */
1312 #define IEEE80211_COUNTRY_IE_MIN_LEN    6
1313
1314 /*
1315  * For regulatory extension stuff see IEEE 802.11-2007
1316  * Annex I (page 1141) and Annex J (page 1147). Also
1317  * review 7.3.2.9.
1318  *
1319  * When dot11RegulatoryClassesRequired is true and the
1320  * first_channel/reg_extension_id is >= 201 then the IE
1321  * compromises of the 'ext' struct represented below:
1322  *
1323  *  - Regulatory extension ID - when generating IE this just needs
1324  *    to be monotonically increasing for each triplet passed in
1325  *    the IE
1326  *  - Regulatory class - index into set of rules
1327  *  - Coverage class - index into air propagation time (Table 7-27),
1328  *    in microseconds, you can compute the air propagation time from
1329  *    the index by multiplying by 3, so index 10 yields a propagation
1330  *    of 10 us. Valid values are 0-31, values 32-255 are not defined
1331  *    yet. A value of 0 inicates air propagation of <= 1 us.
1332  *
1333  *  See also Table I.2 for Emission limit sets and table
1334  *  I.3 for Behavior limit sets. Table J.1 indicates how to map
1335  *  a reg_class to an emission limit set and behavior limit set.
1336  */
1337 #define IEEE80211_COUNTRY_EXTENSION_ID 201
1338
1339 /*
1340  *  Channels numbers in the IE must be monotonically increasing
1341  *  if dot11RegulatoryClassesRequired is not true.
1342  *
1343  *  If dot11RegulatoryClassesRequired is true consecutive
1344  *  subband triplets following a regulatory triplet shall
1345  *  have monotonically increasing first_channel number fields.
1346  *
1347  *  Channel numbers shall not overlap.
1348  *
1349  *  Note that max_power is signed.
1350  */
1351 struct ieee80211_country_ie_triplet {
1352         union {
1353                 struct {
1354                         u8 first_channel;
1355                         u8 num_channels;
1356                         s8 max_power;
1357                 } __attribute__ ((packed)) chans;
1358                 struct {
1359                         u8 reg_extension_id;
1360                         u8 reg_class;
1361                         u8 coverage_class;
1362                 } __attribute__ ((packed)) ext;
1363         };
1364 } __attribute__ ((packed));
1365
1366 enum ieee80211_timeout_interval_type {
1367         WLAN_TIMEOUT_REASSOC_DEADLINE = 1 /* 802.11r */,
1368         WLAN_TIMEOUT_KEY_LIFETIME = 2 /* 802.11r */,
1369         WLAN_TIMEOUT_ASSOC_COMEBACK = 3 /* 802.11w */,
1370 };
1371
1372 /* BACK action code */
1373 enum ieee80211_back_actioncode {
1374         WLAN_ACTION_ADDBA_REQ = 0,
1375         WLAN_ACTION_ADDBA_RESP = 1,
1376         WLAN_ACTION_DELBA = 2,
1377 };
1378
1379 /* BACK (block-ack) parties */
1380 enum ieee80211_back_parties {
1381         WLAN_BACK_RECIPIENT = 0,
1382         WLAN_BACK_INITIATOR = 1,
1383 };
1384
1385 /* SA Query action */
1386 enum ieee80211_sa_query_action {
1387         WLAN_ACTION_SA_QUERY_REQUEST = 0,
1388         WLAN_ACTION_SA_QUERY_RESPONSE = 1,
1389 };
1390
1391
1392 /* A-MSDU 802.11n */
1393 #define IEEE80211_QOS_CONTROL_A_MSDU_PRESENT 0x0080
1394
1395 /* cipher suite selectors */
1396 #define WLAN_CIPHER_SUITE_USE_GROUP     0x000FAC00
1397 #define WLAN_CIPHER_SUITE_WEP40         0x000FAC01
1398 #define WLAN_CIPHER_SUITE_TKIP          0x000FAC02
1399 /* reserved:                            0x000FAC03 */
1400 #define WLAN_CIPHER_SUITE_CCMP          0x000FAC04
1401 #define WLAN_CIPHER_SUITE_WEP104        0x000FAC05
1402 #define WLAN_CIPHER_SUITE_AES_CMAC      0x000FAC06
1403
1404 /* AKM suite selectors */
1405 #define WLAN_AKM_SUITE_8021X            0x000FAC01
1406 #define WLAN_AKM_SUITE_PSK              0x000FAC02
1407 #define WLAN_AKM_SUITE_SAE                      0x000FAC08
1408 #define WLAN_AKM_SUITE_FT_OVER_SAE      0x000FAC09
1409
1410 #define WLAN_MAX_KEY_LEN                32
1411
1412 #define WLAN_PMKID_LEN                  16
1413
1414 /**
1415  * ieee80211_get_qos_ctl - get pointer to qos control bytes
1416  * @hdr: the frame
1417  *
1418  * The qos ctrl bytes come after the frame_control, duration, seq_num
1419  * and 3 or 4 addresses of length ETH_ALEN.
1420  * 3 addr: 2 + 2 + 2 + 3*6 = 24
1421  * 4 addr: 2 + 2 + 2 + 4*6 = 30
1422  */
1423 static inline u8 *ieee80211_get_qos_ctl(struct ieee80211_hdr *hdr)
1424 {
1425         if (ieee80211_has_a4(hdr->frame_control))
1426                 return (u8 *)hdr + 30;
1427         else
1428                 return (u8 *)hdr + 24;
1429 }
1430
1431 /**
1432  * ieee80211_get_SA - get pointer to SA
1433  * @hdr: the frame
1434  *
1435  * Given an 802.11 frame, this function returns the offset
1436  * to the source address (SA). It does not verify that the
1437  * header is long enough to contain the address, and the
1438  * header must be long enough to contain the frame control
1439  * field.
1440  */
1441 static inline u8 *ieee80211_get_SA(struct ieee80211_hdr *hdr)
1442 {
1443         if (ieee80211_has_a4(hdr->frame_control))
1444                 return hdr->addr4;
1445         if (ieee80211_has_fromds(hdr->frame_control))
1446                 return hdr->addr3;
1447         return hdr->addr2;
1448 }
1449
1450 /**
1451  * ieee80211_get_DA - get pointer to DA
1452  * @hdr: the frame
1453  *
1454  * Given an 802.11 frame, this function returns the offset
1455  * to the destination address (DA). It does not verify that
1456  * the header is long enough to contain the address, and the
1457  * header must be long enough to contain the frame control
1458  * field.
1459  */
1460 static inline u8 *ieee80211_get_DA(struct ieee80211_hdr *hdr)
1461 {
1462         if (ieee80211_has_tods(hdr->frame_control))
1463                 return hdr->addr3;
1464         else
1465                 return hdr->addr1;
1466 }
1467
1468 /**
1469  * ieee80211_is_robust_mgmt_frame - check if frame is a robust management frame
1470  * @hdr: the frame (buffer must include at least the first octet of payload)
1471  */
1472 static inline bool ieee80211_is_robust_mgmt_frame(struct ieee80211_hdr *hdr)
1473 {
1474         if (ieee80211_is_disassoc(hdr->frame_control) ||
1475             ieee80211_is_deauth(hdr->frame_control))
1476                 return true;
1477
1478         if (ieee80211_is_action(hdr->frame_control)) {
1479                 u8 *category;
1480
1481                 /*
1482                  * Action frames, excluding Public Action frames, are Robust
1483                  * Management Frames. However, if we are looking at a Protected
1484                  * frame, skip the check since the data may be encrypted and
1485                  * the frame has already been found to be a Robust Management
1486                  * Frame (by the other end).
1487                  */
1488                 if (ieee80211_has_protected(hdr->frame_control))
1489                         return true;
1490                 category = ((u8 *) hdr) + 24;
1491                 return *category != WLAN_CATEGORY_PUBLIC &&
1492                         *category != WLAN_CATEGORY_HT &&
1493                         *category != WLAN_CATEGORY_VENDOR_SPECIFIC;
1494         }
1495
1496         return false;
1497 }
1498
1499 /**
1500  * ieee80211_fhss_chan_to_freq - get channel frequency
1501  * @channel: the FHSS channel
1502  *
1503  * Convert IEEE802.11 FHSS channel to frequency (MHz)
1504  * Ref IEEE 802.11-2007 section 14.6
1505  */
1506 static inline int ieee80211_fhss_chan_to_freq(int channel)
1507 {
1508         if ((channel > 1) && (channel < 96))
1509                 return channel + 2400;
1510         else
1511                 return -1;
1512 }
1513
1514 /**
1515  * ieee80211_freq_to_fhss_chan - get channel
1516  * @freq: the channels frequency
1517  *
1518  * Convert frequency (MHz) to IEEE802.11 FHSS channel
1519  * Ref IEEE 802.11-2007 section 14.6
1520  */
1521 static inline int ieee80211_freq_to_fhss_chan(int freq)
1522 {
1523         if ((freq > 2401) && (freq < 2496))
1524                 return freq - 2400;
1525         else
1526                 return -1;
1527 }
1528
1529 /**
1530  * ieee80211_dsss_chan_to_freq - get channel center frequency
1531  * @channel: the DSSS channel
1532  *
1533  * Convert IEEE802.11 DSSS channel to the center frequency (MHz).
1534  * Ref IEEE 802.11-2007 section 15.6
1535  */
1536 static inline int ieee80211_dsss_chan_to_freq(int channel)
1537 {
1538         if ((channel > 0) && (channel < 14))
1539                 return 2407 + (channel * 5);
1540         else if (channel == 14)
1541                 return 2484;
1542         else
1543                 return -1;
1544 }
1545
1546 /**
1547  * ieee80211_freq_to_dsss_chan - get channel
1548  * @freq: the frequency
1549  *
1550  * Convert frequency (MHz) to IEEE802.11 DSSS channel
1551  * Ref IEEE 802.11-2007 section 15.6
1552  *
1553  * This routine selects the channel with the closest center frequency.
1554  */
1555 static inline int ieee80211_freq_to_dsss_chan(int freq)
1556 {
1557         if ((freq >= 2410) && (freq < 2475))
1558                 return (freq - 2405) / 5;
1559         else if ((freq >= 2482) && (freq < 2487))
1560                 return 14;
1561         else
1562                 return -1;
1563 }
1564
1565 /* Convert IEEE802.11 HR DSSS channel to frequency (MHz) and back
1566  * Ref IEEE 802.11-2007 section 18.4.6.2
1567  *
1568  * The channels and frequencies are the same as those defined for DSSS
1569  */
1570 #define ieee80211_hr_chan_to_freq(chan) ieee80211_dsss_chan_to_freq(chan)
1571 #define ieee80211_freq_to_hr_chan(freq) ieee80211_freq_to_dsss_chan(freq)
1572
1573 /* Convert IEEE802.11 ERP channel to frequency (MHz) and back
1574  * Ref IEEE 802.11-2007 section 19.4.2
1575  */
1576 #define ieee80211_erp_chan_to_freq(chan) ieee80211_hr_chan_to_freq(chan)
1577 #define ieee80211_freq_to_erp_chan(freq) ieee80211_freq_to_hr_chan(freq)
1578
1579 /**
1580  * ieee80211_ofdm_chan_to_freq - get channel center frequency
1581  * @s_freq: starting frequency == (dotChannelStartingFactor/2) MHz
1582  * @channel: the OFDM channel
1583  *
1584  * Convert IEEE802.11 OFDM channel to center frequency (MHz)
1585  * Ref IEEE 802.11-2007 section 17.3.8.3.2
1586  */
1587 static inline int ieee80211_ofdm_chan_to_freq(int s_freq, int channel)
1588 {
1589         if ((channel > 0) && (channel <= 200) &&
1590             (s_freq >= 4000))
1591                 return s_freq + (channel * 5);
1592         else
1593                 return -1;
1594 }
1595
1596 /**
1597  * ieee80211_freq_to_ofdm_channel - get channel
1598  * @s_freq: starting frequency == (dotChannelStartingFactor/2) MHz
1599  * @freq: the frequency
1600  *
1601  * Convert frequency (MHz) to IEEE802.11 OFDM channel
1602  * Ref IEEE 802.11-2007 section 17.3.8.3.2
1603  *
1604  * This routine selects the channel with the closest center frequency.
1605  */
1606 static inline int ieee80211_freq_to_ofdm_chan(int s_freq, int freq)
1607 {
1608         if ((freq > (s_freq + 2)) && (freq <= (s_freq + 1202)) &&
1609             (s_freq >= 4000))
1610                 return (freq + 2 - s_freq) / 5;
1611         else
1612                 return -1;
1613 }
1614
1615 /**
1616  * ieee80211_tu_to_usec - convert time units (TU) to microseconds
1617  * @tu: the TUs
1618  */
1619 static inline unsigned long ieee80211_tu_to_usec(unsigned long tu)
1620 {
1621         return 1024 * tu;
1622 }
1623
1624 /**
1625  * ieee80211_check_tim - check if AID bit is set in TIM
1626  * @tim: the TIM IE
1627  * @tim_len: length of the TIM IE
1628  * @aid: the AID to look for
1629  */
1630 static inline bool ieee80211_check_tim(struct ieee80211_tim_ie *tim,
1631                                        u8 tim_len, u16 aid)
1632 {
1633         u8 mask;
1634         u8 indexn0, indexn1, indexn2;
1635
1636         if (unlikely(!tim || tim_len < sizeof(*tim)))
1637                 return false;
1638
1639         aid &= 0x3fff;
1640         indexn0 = aid / 8;
1641         mask  = 1 << (aid & 7);
1642
1643         indexn1 = tim->bitmap_ctrl & 0xfe;
1644         indexn2 = tim_len + indexn1 - 4;
1645
1646         if (indexn0 < indexn1 || indexn0 > indexn2)
1647                 return false;
1648
1649         indexn0 -= indexn1;
1650
1651         return !!(tim->virtual_map[indexn0] & mask);
1652 }
1653
1654 #endif /* __LINUX_IEEE80211_H */