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 #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 #define IEEE80211_QOS_CTL_TID_MASK      0x000F
 121 #define IEEE80211_QOS_CTL_TAG1D_MASK    0x0007
 122
 123 /* U-APSD queue for WMM IEs sent by AP */
 124 #define IEEE80211_WMM_IE_AP_QOSINFO_UAPSD       (1<<7)
 125 #define IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK  0x0f
 126
 127 /* U-APSD queues for WMM IEs sent by STA */
 128 #define IEEE80211_WMM_IE_STA_QOSINFO_AC_VO      (1<<0)
 129 #define IEEE80211_WMM_IE_STA_QOSINFO_AC_VI      (1<<1)
 130 #define IEEE80211_WMM_IE_STA_QOSINFO_AC_BK      (1<<2)
 131 #define IEEE80211_WMM_IE_STA_QOSINFO_AC_BE      (1<<3)
 132 #define IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK    0x0f
 133
 134 /* U-APSD max SP length for WMM IEs sent by STA */
 135 #define IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL     0x00
 136 #define IEEE80211_WMM_IE_STA_QOSINFO_SP_2       0x01
 137 #define IEEE80211_WMM_IE_STA_QOSINFO_SP_4       0x02
 138 #define IEEE80211_WMM_IE_STA_QOSINFO_SP_6       0x03
 139 #define IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK    0x03
 140 #define IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT   5
 141
 142 #define IEEE80211_HT_CTL_LEN            4
 143
 144 struct ieee80211_hdr {
 145         __le16 frame_control;
 146         __le16 duration_id;
 147         u8 addr1[6];
 148         u8 addr2[6];
 149         u8 addr3[6];
 150         __le16 seq_ctrl;
 151         u8 addr4[6];
 152 } __attribute__ ((packed));
 153
 154 struct ieee80211_hdr_3addr {
 155         __le16 frame_control;
 156         __le16 duration_id;
 157         u8 addr1[6];
 158         u8 addr2[6];
 159         u8 addr3[6];
 160         __le16 seq_ctrl;
 161 } __attribute__ ((packed));
 162
 163 struct ieee80211_qos_hdr {
 164         __le16 frame_control;
 165         __le16 duration_id;
 166         u8 addr1[6];
 167         u8 addr2[6];
 168         u8 addr3[6];
 169         __le16 seq_ctrl;
 170         __le16 qos_ctrl;
 171 } __attribute__ ((packed));
 172
 173 /**
 174  * ieee80211_has_tods - check if IEEE80211_FCTL_TODS is set
 175  * @fc: frame control bytes in little-endian byteorder
 176  */
 177 static inline int ieee80211_has_tods(__le16 fc)
 178 {
 179         return (fc & cpu_to_le16(IEEE80211_FCTL_TODS)) != 0;
 180 }
 181
 182 /**
 183  * ieee80211_has_fromds - check if IEEE80211_FCTL_FROMDS is set
 184  * @fc: frame control bytes in little-endian byteorder
 185  */
 186 static inline int ieee80211_has_fromds(__le16 fc)
 187 {
 188         return (fc & cpu_to_le16(IEEE80211_FCTL_FROMDS)) != 0;
 189 }
 190
 191 /**
 192  * ieee80211_has_a4 - check if IEEE80211_FCTL_TODS and IEEE80211_FCTL_FROMDS are set
 193  * @fc: frame control bytes in little-endian byteorder
 194  */
 195 static inline int ieee80211_has_a4(__le16 fc)
 196 {
 197         __le16 tmp = cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS);
 198         return (fc & tmp) == tmp;
 199 }
 200
 201 /**
 202  * ieee80211_has_morefrags - check if IEEE80211_FCTL_MOREFRAGS is set
 203  * @fc: frame control bytes in little-endian byteorder
 204  */
 205 static inline int ieee80211_has_morefrags(__le16 fc)
 206 {
 207         return (fc & cpu_to_le16(IEEE80211_FCTL_MOREFRAGS)) != 0;
 208 }
 209
 210 /**
 211  * ieee80211_has_retry - check if IEEE80211_FCTL_RETRY is set
 212  * @fc: frame control bytes in little-endian byteorder
 213  */
 214 static inline int ieee80211_has_retry(__le16 fc)
 215 {
 216         return (fc & cpu_to_le16(IEEE80211_FCTL_RETRY)) != 0;
 217 }
 218
 219 /**
 220  * ieee80211_has_pm - check if IEEE80211_FCTL_PM is set
 221  * @fc: frame control bytes in little-endian byteorder
 222  */
 223 static inline int ieee80211_has_pm(__le16 fc)
 224 {
 225         return (fc & cpu_to_le16(IEEE80211_FCTL_PM)) != 0;
 226 }
 227
 228 /**
 229  * ieee80211_has_moredata - check if IEEE80211_FCTL_MOREDATA is set
 230  * @fc: frame control bytes in little-endian byteorder
 231  */
 232 static inline int ieee80211_has_moredata(__le16 fc)
 233 {
 234         return (fc & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) != 0;
 235 }
 236
 237 /**
 238  * ieee80211_has_protected - check if IEEE80211_FCTL_PROTECTED is set
 239  * @fc: frame control bytes in little-endian byteorder
 240  */
 241 static inline int ieee80211_has_protected(__le16 fc)
 242 {
 243         return (fc & cpu_to_le16(IEEE80211_FCTL_PROTECTED)) != 0;
 244 }
 245
 246 /**
 247  * ieee80211_has_order - check if IEEE80211_FCTL_ORDER is set
 248  * @fc: frame control bytes in little-endian byteorder
 249  */
 250 static inline int ieee80211_has_order(__le16 fc)
 251 {
 252         return (fc & cpu_to_le16(IEEE80211_FCTL_ORDER)) != 0;
 253 }
 254
 255 /**
 256  * ieee80211_is_mgmt - check if type is IEEE80211_FTYPE_MGMT
 257  * @fc: frame control bytes in little-endian byteorder
 258  */
 259 static inline int ieee80211_is_mgmt(__le16 fc)
 260 {
 261         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
 262                cpu_to_le16(IEEE80211_FTYPE_MGMT);
 263 }
 264
 265 /**
 266  * ieee80211_is_ctl - check if type is IEEE80211_FTYPE_CTL
 267  * @fc: frame control bytes in little-endian byteorder
 268  */
 269 static inline int ieee80211_is_ctl(__le16 fc)
 270 {
 271         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
 272                cpu_to_le16(IEEE80211_FTYPE_CTL);
 273 }
 274
 275 /**
 276  * ieee80211_is_data - check if type is IEEE80211_FTYPE_DATA
 277  * @fc: frame control bytes in little-endian byteorder
 278  */
 279 static inline int ieee80211_is_data(__le16 fc)
 280 {
 281         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
 282                cpu_to_le16(IEEE80211_FTYPE_DATA);
 283 }
 284
 285 /**
 286  * ieee80211_is_data_qos - check if type is IEEE80211_FTYPE_DATA and IEEE80211_STYPE_QOS_DATA is set
 287  * @fc: frame control bytes in little-endian byteorder
 288  */
 289 static inline int ieee80211_is_data_qos(__le16 fc)
 290 {
 291         /*
 292          * mask with QOS_DATA rather than IEEE80211_FCTL_STYPE as we just need
 293          * to check the one bit
 294          */
 295         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_STYPE_QOS_DATA)) ==
 296                cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_DATA);
 297 }
 298
 299 /**
 300  * ieee80211_is_data_present - check if type is IEEE80211_FTYPE_DATA and has data
 301  * @fc: frame control bytes in little-endian byteorder
 302  */
 303 static inline int ieee80211_is_data_present(__le16 fc)
 304 {
 305         /*
 306          * mask with 0x40 and test that that bit is clear to only return true
 307          * for the data-containing substypes.
 308          */
 309         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | 0x40)) ==
 310                cpu_to_le16(IEEE80211_FTYPE_DATA);
 311 }
 312
 313 /**
 314  * ieee80211_is_assoc_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ASSOC_REQ
 315  * @fc: frame control bytes in little-endian byteorder
 316  */
 317 static inline int ieee80211_is_assoc_req(__le16 fc)
 318 {
 319         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 320                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ASSOC_REQ);
 321 }
 322
 323 /**
 324  * ieee80211_is_assoc_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ASSOC_RESP
 325  * @fc: frame control bytes in little-endian byteorder
 326  */
 327 static inline int ieee80211_is_assoc_resp(__le16 fc)
 328 {
 329         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 330                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ASSOC_RESP);
 331 }
 332
 333 /**
 334  * ieee80211_is_reassoc_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_REASSOC_REQ
 335  * @fc: frame control bytes in little-endian byteorder
 336  */
 337 static inline int ieee80211_is_reassoc_req(__le16 fc)
 338 {
 339         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 340                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_REASSOC_REQ);
 341 }
 342
 343 /**
 344  * ieee80211_is_reassoc_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_REASSOC_RESP
 345  * @fc: frame control bytes in little-endian byteorder
 346  */
 347 static inline int ieee80211_is_reassoc_resp(__le16 fc)
 348 {
 349         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 350                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_REASSOC_RESP);
 351 }
 352
 353 /**
 354  * ieee80211_is_probe_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_PROBE_REQ
 355  * @fc: frame control bytes in little-endian byteorder
 356  */
 357 static inline int ieee80211_is_probe_req(__le16 fc)
 358 {
 359         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 360                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_REQ);
 361 }
 362
 363 /**
 364  * ieee80211_is_probe_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_PROBE_RESP
 365  * @fc: frame control bytes in little-endian byteorder
 366  */
 367 static inline int ieee80211_is_probe_resp(__le16 fc)
 368 {
 369         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 370                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_RESP);
 371 }
 372
 373 /**
 374  * ieee80211_is_beacon - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_BEACON
 375  * @fc: frame control bytes in little-endian byteorder
 376  */
 377 static inline int ieee80211_is_beacon(__le16 fc)
 378 {
 379         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 380                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON);
 381 }
 382
 383 /**
 384  * ieee80211_is_atim - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ATIM
 385  * @fc: frame control bytes in little-endian byteorder
 386  */
 387 static inline int ieee80211_is_atim(__le16 fc)
 388 {
 389         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 390                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ATIM);
 391 }
 392
 393 /**
 394  * ieee80211_is_disassoc - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_DISASSOC
 395  * @fc: frame control bytes in little-endian byteorder
 396  */
 397 static inline int ieee80211_is_disassoc(__le16 fc)
 398 {
 399         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 400                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DISASSOC);
 401 }
 402
 403 /**
 404  * ieee80211_is_auth - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_AUTH
 405  * @fc: frame control bytes in little-endian byteorder
 406  */
 407 static inline int ieee80211_is_auth(__le16 fc)
 408 {
 409         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 410                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH);
 411 }
 412
 413 /**
 414  * ieee80211_is_deauth - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_DEAUTH
 415  * @fc: frame control bytes in little-endian byteorder
 416  */
 417 static inline int ieee80211_is_deauth(__le16 fc)
 418 {
 419         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 420                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DEAUTH);
 421 }
 422
 423 /**
 424  * ieee80211_is_action - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ACTION
 425  * @fc: frame control bytes in little-endian byteorder
 426  */
 427 static inline int ieee80211_is_action(__le16 fc)
 428 {
 429         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 430                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION);
 431 }
 432
 433 /**
 434  * ieee80211_is_back_req - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_BACK_REQ
 435  * @fc: frame control bytes in little-endian byteorder
 436  */
 437 static inline int ieee80211_is_back_req(__le16 fc)
 438 {
 439         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 440                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK_REQ);
 441 }
 442
 443 /**
 444  * ieee80211_is_back - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_BACK
 445  * @fc: frame control bytes in little-endian byteorder
 446  */
 447 static inline int ieee80211_is_back(__le16 fc)
 448 {
 449         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 450                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK);
 451 }
 452
 453 /**
 454  * ieee80211_is_pspoll - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_PSPOLL
 455  * @fc: frame control bytes in little-endian byteorder
 456  */
 457 static inline int ieee80211_is_pspoll(__le16 fc)
 458 {
 459         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 460                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
 461 }
 462
 463 /**
 464  * ieee80211_is_rts - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_RTS
 465  * @fc: frame control bytes in little-endian byteorder
 466  */
 467 static inline int ieee80211_is_rts(__le16 fc)
 468 {
 469         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 470                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
 471 }
 472
 473 /**
 474  * ieee80211_is_cts - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CTS
 475  * @fc: frame control bytes in little-endian byteorder
 476  */
 477 static inline int ieee80211_is_cts(__le16 fc)
 478 {
 479         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 480                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
 481 }
 482
 483 /**
 484  * ieee80211_is_ack - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_ACK
 485  * @fc: frame control bytes in little-endian byteorder
 486  */
 487 static inline int ieee80211_is_ack(__le16 fc)
 488 {
 489         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 490                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK);
 491 }
 492
 493 /**
 494  * ieee80211_is_cfend - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CFEND
 495  * @fc: frame control bytes in little-endian byteorder
 496  */
 497 static inline int ieee80211_is_cfend(__le16 fc)
 498 {
 499         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 500                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CFEND);
 501 }
 502
 503 /**
 504  * ieee80211_is_cfendack - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CFENDACK
 505  * @fc: frame control bytes in little-endian byteorder
 506  */
 507 static inline int ieee80211_is_cfendack(__le16 fc)
 508 {
 509         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 510                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CFENDACK);
 511 }
 512
 513 /**
 514  * ieee80211_is_nullfunc - check if frame is a regular (non-QoS) nullfunc frame
 515  * @fc: frame control bytes in little-endian byteorder
 516  */
 517 static inline int ieee80211_is_nullfunc(__le16 fc)
 518 {
 519         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 520                cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC);
 521 }
 522
 523 /**
 524  * ieee80211_is_qos_nullfunc - check if frame is a QoS nullfunc frame
 525  * @fc: frame control bytes in little-endian byteorder
 526  */
 527 static inline int ieee80211_is_qos_nullfunc(__le16 fc)
 528 {
 529         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 530                cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_NULLFUNC);
 531 }
 532
 533 struct ieee80211s_hdr {
 534         u8 flags;
 535         u8 ttl;
 536         __le32 seqnum;
 537         u8 eaddr1[6];
 538         u8 eaddr2[6];
 539 } __attribute__ ((packed));
 540
 541 /* Mesh flags */
 542 #define MESH_FLAGS_AE_A4        0x1
 543 #define MESH_FLAGS_AE_A5_A6     0x2
 544 #define MESH_FLAGS_AE           0x3
 545 #define MESH_FLAGS_PS_DEEP      0x4
 546
 547 /**
 548  * struct ieee80211_quiet_ie
 549  *
 550  * This structure refers to "Quiet information element"
 551  */
 552 struct ieee80211_quiet_ie {
 553         u8 count;
 554         u8 period;
 555         __le16 duration;
 556         __le16 offset;
 557 } __attribute__ ((packed));
 558
 559 /**
 560  * struct ieee80211_msrment_ie
 561  *
 562  * This structure refers to "Measurement Request/Report information element"
 563  */
 564 struct ieee80211_msrment_ie {
 565         u8 token;
 566         u8 mode;
 567         u8 type;
 568         u8 request[0];
 569 } __attribute__ ((packed));
 570
 571 /**
 572  * struct ieee80211_channel_sw_ie
 573  *
 574  * This structure refers to "Channel Switch Announcement information element"
 575  */
 576 struct ieee80211_channel_sw_ie {
 577         u8 mode;
 578         u8 new_ch_num;
 579         u8 count;
 580 } __attribute__ ((packed));
 581
 582 /**
 583  * struct ieee80211_tim
 584  *
 585  * This structure refers to "Traffic Indication Map information element"
 586  */
 587 struct ieee80211_tim_ie {
 588         u8 dtim_count;
 589         u8 dtim_period;
 590         u8 bitmap_ctrl;
 591         /* variable size: 1 - 251 bytes */
 592         u8 virtual_map[1];
 593 } __attribute__ ((packed));
 594
 595 /**
 596  * struct ieee80211_meshconf_ie
 597  *
 598  * This structure refers to "Mesh Configuration information element"
 599  */
 600 struct ieee80211_meshconf_ie {
 601         u8 meshconf_psel;
 602         u8 meshconf_pmetric;
 603         u8 meshconf_congest;
 604         u8 meshconf_synch;
 605         u8 meshconf_auth;
 606         u8 meshconf_form;
 607         u8 meshconf_cap;
 608 } __attribute__ ((packed));
 609
 610 /**
 611  * struct ieee80211_rann_ie
 612  *
 613  * This structure refers to "Root Announcement information element"
 614  */
 615 struct ieee80211_rann_ie {
 616         u8 rann_flags;
 617         u8 rann_hopcount;
 618         u8 rann_ttl;
 619         u8 rann_addr[6];
 620         u32 rann_seq;
 621         u32 rann_metric;
 622 } __attribute__ ((packed));
 623
 624 #define WLAN_SA_QUERY_TR_ID_LEN 2
 625
 626 struct ieee80211_mgmt {
 627         __le16 frame_control;
 628         __le16 duration;
 629         u8 da[6];
 630         u8 sa[6];
 631         u8 bssid[6];
 632         __le16 seq_ctrl;
 633         union {
 634                 struct {
 635                         __le16 auth_alg;
 636                         __le16 auth_transaction;
 637                         __le16 status_code;
 638                         /* possibly followed by Challenge text */
 639                         u8 variable[0];
 640                 } __attribute__ ((packed)) auth;
 641                 struct {
 642                         __le16 reason_code;
 643                 } __attribute__ ((packed)) deauth;
 644                 struct {
 645                         __le16 capab_info;
 646                         __le16 listen_interval;
 647                         /* followed by SSID and Supported rates */
 648                         u8 variable[0];
 649                 } __attribute__ ((packed)) assoc_req;
 650                 struct {
 651                         __le16 capab_info;
 652                         __le16 status_code;
 653                         __le16 aid;
 654                         /* followed by Supported rates */
 655                         u8 variable[0];
 656                 } __attribute__ ((packed)) assoc_resp, reassoc_resp;
 657                 struct {
 658                         __le16 capab_info;
 659                         __le16 listen_interval;
 660                         u8 current_ap[6];
 661                         /* followed by SSID and Supported rates */
 662                         u8 variable[0];
 663                 } __attribute__ ((packed)) reassoc_req;
 664                 struct {
 665                         __le16 reason_code;
 666                 } __attribute__ ((packed)) disassoc;
 667                 struct {
 668                         __le64 timestamp;
 669                         __le16 beacon_int;
 670                         __le16 capab_info;
 671                         /* followed by some of SSID, Supported rates,
 672                          * FH Params, DS Params, CF Params, IBSS Params, TIM */
 673                         u8 variable[0];
 674                 } __attribute__ ((packed)) beacon;
 675                 struct {
 676                         /* only variable items: SSID, Supported rates */
 677                         u8 variable[0];
 678                 } __attribute__ ((packed)) probe_req;
 679                 struct {
 680                         __le64 timestamp;
 681                         __le16 beacon_int;
 682                         __le16 capab_info;
 683                         /* followed by some of SSID, Supported rates,
 684                          * FH Params, DS Params, CF Params, IBSS Params */
 685                         u8 variable[0];
 686                 } __attribute__ ((packed)) probe_resp;
 687                 struct {
 688                         u8 category;
 689                         union {
 690                                 struct {
 691                                         u8 action_code;
 692                                         u8 dialog_token;
 693                                         u8 status_code;
 694                                         u8 variable[0];
 695                                 } __attribute__ ((packed)) wme_action;
 696                                 struct{
 697                                         u8 action_code;
 698                                         u8 element_id;
 699                                         u8 length;
 700                                         struct ieee80211_channel_sw_ie sw_elem;
 701                                 } __attribute__((packed)) chan_switch;
 702                                 struct{
 703                                         u8 action_code;
 704                                         u8 dialog_token;
 705                                         u8 element_id;
 706                                         u8 length;
 707                                         struct ieee80211_msrment_ie msr_elem;
 708                                 } __attribute__((packed)) measurement;
 709                                 struct{
 710                                         u8 action_code;
 711                                         u8 dialog_token;
 712                                         __le16 capab;
 713                                         __le16 timeout;
 714                                         __le16 start_seq_num;
 715                                 } __attribute__((packed)) addba_req;
 716                                 struct{
 717                                         u8 action_code;
 718                                         u8 dialog_token;
 719                                         __le16 status;
 720                                         __le16 capab;
 721                                         __le16 timeout;
 722                                 } __attribute__((packed)) addba_resp;
 723                                 struct{
 724                                         u8 action_code;
 725                                         __le16 params;
 726                                         __le16 reason_code;
 727                                 } __attribute__((packed)) delba;
 728                                 struct{
 729                                         u8 action_code;
 730                                         /* capab_info for open and confirm,
 731                                          * reason for close
 732                                          */
 733                                         __le16 aux;
 734                                         /* Followed in plink_confirm by status
 735                                          * code, AID and supported rates,
 736                                          * and directly by supported rates in
 737                                          * plink_open and plink_close
 738                                          */
 739                                         u8 variable[0];
 740                                 } __attribute__((packed)) plink_action;
 741                                 struct{
 742                                         u8 action_code;
 743                                         u8 variable[0];
 744                                 } __attribute__((packed)) mesh_action;
 745                                 struct {
 746                                         u8 action;
 747                                         u8 trans_id[WLAN_SA_QUERY_TR_ID_LEN];
 748                                 } __attribute__ ((packed)) sa_query;
 749                                 struct {
 750                                         u8 action;
 751                                         u8 smps_control;
 752                                 } __attribute__ ((packed)) ht_smps;
 753                         } u;
 754                 } __attribute__ ((packed)) action;
 755         } u;
 756 } __attribute__ ((packed));
 757
 758 /* mgmt header + 1 byte category code */
 759 #define IEEE80211_MIN_ACTION_SIZE offsetof(struct ieee80211_mgmt, u.action.u)
 760
 761
 762 /* Management MIC information element (IEEE 802.11w) */
 763 struct ieee80211_mmie {
 764         u8 element_id;
 765         u8 length;
 766         __le16 key_id;
 767         u8 sequence_number[6];
 768         u8 mic[8];
 769 } __attribute__ ((packed));
 770
 771 /* Control frames */
 772 struct ieee80211_rts {
 773         __le16 frame_control;
 774         __le16 duration;
 775         u8 ra[6];
 776         u8 ta[6];
 777 } __attribute__ ((packed));
 778
 779 struct ieee80211_cts {
 780         __le16 frame_control;
 781         __le16 duration;
 782         u8 ra[6];
 783 } __attribute__ ((packed));
 784
 785 struct ieee80211_pspoll {
 786         __le16 frame_control;
 787         __le16 aid;
 788         u8 bssid[6];
 789         u8 ta[6];
 790 } __attribute__ ((packed));
 791
 792 /**
 793  * struct ieee80211_bar - HT Block Ack Request
 794  *
 795  * This structure refers to "HT BlockAckReq" as
 796  * described in 802.11n draft section 7.2.1.7.1
 797  */
 798 struct ieee80211_bar {
 799         __le16 frame_control;
 800         __le16 duration;
 801         __u8 ra[6];
 802         __u8 ta[6];
 803         __le16 control;
 804         __le16 start_seq_num;
 805 } __attribute__((packed));
 806
 807 /* 802.11 BAR control masks */
 808 #define IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL     0x0000
 809 #define IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA  0x0004
 810
 811
 812 #define IEEE80211_HT_MCS_MASK_LEN               10
 813
 814 /**
 815  * struct ieee80211_mcs_info - MCS information
 816  * @rx_mask: RX mask
 817  * @rx_highest: highest supported RX rate. If set represents
 818  *      the highest supported RX data rate in units of 1 Mbps.
 819  *      If this field is 0 this value should not be used to
 820  *      consider the highest RX data rate supported.
 821  * @tx_params: TX parameters
 822  */
 823 struct ieee80211_mcs_info {
 824         u8 rx_mask[IEEE80211_HT_MCS_MASK_LEN];
 825         __le16 rx_highest;
 826         u8 tx_params;
 827         u8 reserved[3];
 828 } __attribute__((packed));
 829
 830 /* 802.11n HT capability MSC set */
 831 #define IEEE80211_HT_MCS_RX_HIGHEST_MASK        0x3ff
 832 #define IEEE80211_HT_MCS_TX_DEFINED             0x01
 833 #define IEEE80211_HT_MCS_TX_RX_DIFF             0x02
 834 /* value 0 == 1 stream etc */
 835 #define IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK    0x0C
 836 #define IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT   2
 837 #define         IEEE80211_HT_MCS_TX_MAX_STREAMS 4
 838 #define IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION  0x10
 839
 840 /*
 841  * 802.11n D5.0 20.3.5 / 20.6 says:
 842  * - indices 0 to 7 and 32 are single spatial stream
 843  * - 8 to 31 are multiple spatial streams using equal modulation
 844  *   [8..15 for two streams, 16..23 for three and 24..31 for four]
 845  * - remainder are multiple spatial streams using unequal modulation
 846  */
 847 #define IEEE80211_HT_MCS_UNEQUAL_MODULATION_START 33
 848 #define IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE \
 849         (IEEE80211_HT_MCS_UNEQUAL_MODULATION_START / 8)
 850
 851 /**
 852  * struct ieee80211_ht_cap - HT capabilities
 853  *
 854  * This structure is the "HT capabilities element" as
 855  * described in 802.11n D5.0 7.3.2.57
 856  */
 857 struct ieee80211_ht_cap {
 858         __le16 cap_info;
 859         u8 ampdu_params_info;
 860
 861         /* 16 bytes MCS information */
 862         struct ieee80211_mcs_info mcs;
 863
 864         __le16 extended_ht_cap_info;
 865         __le32 tx_BF_cap_info;
 866         u8 antenna_selection_info;
 867 } __attribute__ ((packed));
 868
 869 /* 802.11n HT capabilities masks (for cap_info) */
 870 #define IEEE80211_HT_CAP_LDPC_CODING            0x0001
 871 #define IEEE80211_HT_CAP_SUP_WIDTH_20_40        0x0002
 872 #define IEEE80211_HT_CAP_SM_PS                  0x000C
 873 #define         IEEE80211_HT_CAP_SM_PS_SHIFT    2
 874 #define IEEE80211_HT_CAP_GRN_FLD                0x0010
 875 #define IEEE80211_HT_CAP_SGI_20                 0x0020
 876 #define IEEE80211_HT_CAP_SGI_40                 0x0040
 877 #define IEEE80211_HT_CAP_TX_STBC                0x0080
 878 #define IEEE80211_HT_CAP_RX_STBC                0x0300
 879 #define         IEEE80211_HT_CAP_RX_STBC_SHIFT  8
 880 #define IEEE80211_HT_CAP_DELAY_BA               0x0400
 881 #define IEEE80211_HT_CAP_MAX_AMSDU              0x0800
 882 #define IEEE80211_HT_CAP_DSSSCCK40              0x1000
 883 #define IEEE80211_HT_CAP_RESERVED               0x2000
 884 #define IEEE80211_HT_CAP_40MHZ_INTOLERANT       0x4000
 885 #define IEEE80211_HT_CAP_LSIG_TXOP_PROT         0x8000
 886
 887 /* 802.11n HT capability AMPDU settings (for ampdu_params_info) */
 888 #define IEEE80211_HT_AMPDU_PARM_FACTOR          0x03
 889 #define IEEE80211_HT_AMPDU_PARM_DENSITY         0x1C
 890 #define         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT   2
 891
 892 /*
 893  * Maximum length of AMPDU that the STA can receive.
 894  * Length = 2 ^ (13 + max_ampdu_length_exp) - 1 (octets)
 895  */
 896 enum ieee80211_max_ampdu_length_exp {
 897         IEEE80211_HT_MAX_AMPDU_8K = 0,
 898         IEEE80211_HT_MAX_AMPDU_16K = 1,
 899         IEEE80211_HT_MAX_AMPDU_32K = 2,
 900         IEEE80211_HT_MAX_AMPDU_64K = 3
 901 };
 902
 903 #define IEEE80211_HT_MAX_AMPDU_FACTOR 13
 904
 905 /* Minimum MPDU start spacing */
 906 enum ieee80211_min_mpdu_spacing {
 907         IEEE80211_HT_MPDU_DENSITY_NONE = 0,     /* No restriction */
 908         IEEE80211_HT_MPDU_DENSITY_0_25 = 1,     /* 1/4 usec */
 909         IEEE80211_HT_MPDU_DENSITY_0_5 = 2,      /* 1/2 usec */
 910         IEEE80211_HT_MPDU_DENSITY_1 = 3,        /* 1 usec */
 911         IEEE80211_HT_MPDU_DENSITY_2 = 4,        /* 2 usec */
 912         IEEE80211_HT_MPDU_DENSITY_4 = 5,        /* 4 usec */
 913         IEEE80211_HT_MPDU_DENSITY_8 = 6,        /* 8 usec */
 914         IEEE80211_HT_MPDU_DENSITY_16 = 7        /* 16 usec */
 915 };
 916
 917 /**
 918  * struct ieee80211_ht_info - HT information
 919  *
 920  * This structure is the "HT information element" as
 921  * described in 802.11n D5.0 7.3.2.58
 922  */
 923 struct ieee80211_ht_info {
 924         u8 control_chan;
 925         u8 ht_param;
 926         __le16 operation_mode;
 927         __le16 stbc_param;
 928         u8 basic_set[16];
 929 } __attribute__ ((packed));
 930
 931 /* for ht_param */
 932 #define IEEE80211_HT_PARAM_CHA_SEC_OFFSET               0x03
 933 #define         IEEE80211_HT_PARAM_CHA_SEC_NONE         0x00
 934 #define         IEEE80211_HT_PARAM_CHA_SEC_ABOVE        0x01
 935 #define         IEEE80211_HT_PARAM_CHA_SEC_BELOW        0x03
 936 #define IEEE80211_HT_PARAM_CHAN_WIDTH_ANY               0x04
 937 #define IEEE80211_HT_PARAM_RIFS_MODE                    0x08
 938 #define IEEE80211_HT_PARAM_SPSMP_SUPPORT                0x10
 939 #define IEEE80211_HT_PARAM_SERV_INTERVAL_GRAN           0xE0
 940
 941 /* for operation_mode */
 942 #define IEEE80211_HT_OP_MODE_PROTECTION                 0x0003
 943 #define         IEEE80211_HT_OP_MODE_PROTECTION_NONE            0
 944 #define         IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER       1
 945 #define         IEEE80211_HT_OP_MODE_PROTECTION_20MHZ           2
 946 #define         IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED     3
 947 #define IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT           0x0004
 948 #define IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT           0x0010
 949
 950 /* for stbc_param */
 951 #define IEEE80211_HT_STBC_PARAM_DUAL_BEACON             0x0040
 952 #define IEEE80211_HT_STBC_PARAM_DUAL_CTS_PROT           0x0080
 953 #define IEEE80211_HT_STBC_PARAM_STBC_BEACON             0x0100
 954 #define IEEE80211_HT_STBC_PARAM_LSIG_TXOP_FULLPROT      0x0200
 955 #define IEEE80211_HT_STBC_PARAM_PCO_ACTIVE              0x0400
 956 #define IEEE80211_HT_STBC_PARAM_PCO_PHASE               0x0800
 957
 958
 959 /* block-ack parameters */
 960 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
 961 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
 962 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFC0
 963 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
 964 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
 965
 966 /*
 967  * A-PMDU buffer sizes
 968  * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2)
 969  */
 970 #define IEEE80211_MIN_AMPDU_BUF 0x8
 971 #define IEEE80211_MAX_AMPDU_BUF 0x40
 972
 973
 974 /* Spatial Multiplexing Power Save Modes (for capability) */
 975 #define WLAN_HT_CAP_SM_PS_STATIC        0
 976 #define WLAN_HT_CAP_SM_PS_DYNAMIC       1
 977 #define WLAN_HT_CAP_SM_PS_INVALID       2
 978 #define WLAN_HT_CAP_SM_PS_DISABLED      3
 979
 980 /* for SM power control field lower two bits */
 981 #define WLAN_HT_SMPS_CONTROL_DISABLED   0
 982 #define WLAN_HT_SMPS_CONTROL_STATIC     1
 983 #define WLAN_HT_SMPS_CONTROL_DYNAMIC    3
 984
 985 /* Authentication algorithms */
 986 #define WLAN_AUTH_OPEN 0
 987 #define WLAN_AUTH_SHARED_KEY 1
 988 #define WLAN_AUTH_FT 2
 989 #define WLAN_AUTH_SAE 3
 990 #define WLAN_AUTH_LEAP 128
 991
 992 #define WLAN_AUTH_CHALLENGE_LEN 128
 993
 994 #define WLAN_CAPABILITY_ESS             (1<<0)
 995 #define WLAN_CAPABILITY_IBSS            (1<<1)
 996 #define WLAN_CAPABILITY_CF_POLLABLE     (1<<2)
 997 #define WLAN_CAPABILITY_CF_POLL_REQUEST (1<<3)
 998 #define WLAN_CAPABILITY_PRIVACY         (1<<4)
 999 #define WLAN_CAPABILITY_SHORT_PREAMBLE  (1<<5)
1000 #define WLAN_CAPABILITY_PBCC            (1<<6)
1001 #define WLAN_CAPABILITY_CHANNEL_AGILITY (1<<7)
1002
1003 /* 802.11h */
1004 #define WLAN_CAPABILITY_SPECTRUM_MGMT   (1<<8)
1005 #define WLAN_CAPABILITY_QOS             (1<<9)
1006 #define WLAN_CAPABILITY_SHORT_SLOT_TIME (1<<10)
1007 #define WLAN_CAPABILITY_DSSS_OFDM       (1<<13)
1008 /* measurement */
1009 #define IEEE80211_SPCT_MSR_RPRT_MODE_LATE       (1<<0)
1010 #define IEEE80211_SPCT_MSR_RPRT_MODE_INCAPABLE  (1<<1)
1011 #define IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED    (1<<2)
1012
1013 #define IEEE80211_SPCT_MSR_RPRT_TYPE_BASIC      0
1014 #define IEEE80211_SPCT_MSR_RPRT_TYPE_CCA        1
1015 #define IEEE80211_SPCT_MSR_RPRT_TYPE_RPI        2
1016
1017
1018 /* 802.11g ERP information element */
1019 #define WLAN_ERP_NON_ERP_PRESENT (1<<0)
1020 #define WLAN_ERP_USE_PROTECTION (1<<1)
1021 #define WLAN_ERP_BARKER_PREAMBLE (1<<2)
1022
1023 /* WLAN_ERP_BARKER_PREAMBLE values */
1024 enum {
1025         WLAN_ERP_PREAMBLE_SHORT = 0,
1026         WLAN_ERP_PREAMBLE_LONG = 1,
1027 };
1028
1029 /* Status codes */
1030 enum ieee80211_statuscode {
1031         WLAN_STATUS_SUCCESS = 0,
1032         WLAN_STATUS_UNSPECIFIED_FAILURE = 1,
1033         WLAN_STATUS_CAPS_UNSUPPORTED = 10,
1034         WLAN_STATUS_REASSOC_NO_ASSOC = 11,
1035         WLAN_STATUS_ASSOC_DENIED_UNSPEC = 12,
1036         WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG = 13,
1037         WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION = 14,
1038         WLAN_STATUS_CHALLENGE_FAIL = 15,
1039         WLAN_STATUS_AUTH_TIMEOUT = 16,
1040         WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA = 17,
1041         WLAN_STATUS_ASSOC_DENIED_RATES = 18,
1042         /* 802.11b */
1043         WLAN_STATUS_ASSOC_DENIED_NOSHORTPREAMBLE = 19,
1044         WLAN_STATUS_ASSOC_DENIED_NOPBCC = 20,
1045         WLAN_STATUS_ASSOC_DENIED_NOAGILITY = 21,
1046         /* 802.11h */
1047         WLAN_STATUS_ASSOC_DENIED_NOSPECTRUM = 22,
1048         WLAN_STATUS_ASSOC_REJECTED_BAD_POWER = 23,
1049         WLAN_STATUS_ASSOC_REJECTED_BAD_SUPP_CHAN = 24,
1050         /* 802.11g */
1051         WLAN_STATUS_ASSOC_DENIED_NOSHORTTIME = 25,
1052         WLAN_STATUS_ASSOC_DENIED_NODSSSOFDM = 26,
1053         /* 802.11w */
1054         WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY = 30,
1055         WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION = 31,
1056         /* 802.11i */
1057         WLAN_STATUS_INVALID_IE = 40,
1058         WLAN_STATUS_INVALID_GROUP_CIPHER = 41,
1059         WLAN_STATUS_INVALID_PAIRWISE_CIPHER = 42,
1060         WLAN_STATUS_INVALID_AKMP = 43,
1061         WLAN_STATUS_UNSUPP_RSN_VERSION = 44,
1062         WLAN_STATUS_INVALID_RSN_IE_CAP = 45,
1063         WLAN_STATUS_CIPHER_SUITE_REJECTED = 46,
1064         /* 802.11e */
1065         WLAN_STATUS_UNSPECIFIED_QOS = 32,
1066         WLAN_STATUS_ASSOC_DENIED_NOBANDWIDTH = 33,
1067         WLAN_STATUS_ASSOC_DENIED_LOWACK = 34,
1068         WLAN_STATUS_ASSOC_DENIED_UNSUPP_QOS = 35,
1069         WLAN_STATUS_REQUEST_DECLINED = 37,
1070         WLAN_STATUS_INVALID_QOS_PARAM = 38,
1071         WLAN_STATUS_CHANGE_TSPEC = 39,
1072         WLAN_STATUS_WAIT_TS_DELAY = 47,
1073         WLAN_STATUS_NO_DIRECT_LINK = 48,
1074         WLAN_STATUS_STA_NOT_PRESENT = 49,
1075         WLAN_STATUS_STA_NOT_QSTA = 50,
1076         /* 802.11s */
1077         WLAN_STATUS_ANTI_CLOG_REQUIRED = 76,
1078         WLAN_STATUS_FCG_NOT_SUPP = 78,
1079         WLAN_STATUS_STA_NO_TBTT = 78,
1080 };
1081
1082
1083 /* Reason codes */
1084 enum ieee80211_reasoncode {
1085         WLAN_REASON_UNSPECIFIED = 1,
1086         WLAN_REASON_PREV_AUTH_NOT_VALID = 2,
1087         WLAN_REASON_DEAUTH_LEAVING = 3,
1088         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY = 4,
1089         WLAN_REASON_DISASSOC_AP_BUSY = 5,
1090         WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA = 6,
1091         WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA = 7,
1092         WLAN_REASON_DISASSOC_STA_HAS_LEFT = 8,
1093         WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH = 9,
1094         /* 802.11h */
1095         WLAN_REASON_DISASSOC_BAD_POWER = 10,
1096         WLAN_REASON_DISASSOC_BAD_SUPP_CHAN = 11,
1097         /* 802.11i */
1098         WLAN_REASON_INVALID_IE = 13,
1099         WLAN_REASON_MIC_FAILURE = 14,
1100         WLAN_REASON_4WAY_HANDSHAKE_TIMEOUT = 15,
1101         WLAN_REASON_GROUP_KEY_HANDSHAKE_TIMEOUT = 16,
1102         WLAN_REASON_IE_DIFFERENT = 17,
1103         WLAN_REASON_INVALID_GROUP_CIPHER = 18,
1104         WLAN_REASON_INVALID_PAIRWISE_CIPHER = 19,
1105         WLAN_REASON_INVALID_AKMP = 20,
1106         WLAN_REASON_UNSUPP_RSN_VERSION = 21,
1107         WLAN_REASON_INVALID_RSN_IE_CAP = 22,
1108         WLAN_REASON_IEEE8021X_FAILED = 23,
1109         WLAN_REASON_CIPHER_SUITE_REJECTED = 24,
1110         /* 802.11e */
1111         WLAN_REASON_DISASSOC_UNSPECIFIED_QOS = 32,
1112         WLAN_REASON_DISASSOC_QAP_NO_BANDWIDTH = 33,
1113         WLAN_REASON_DISASSOC_LOW_ACK = 34,
1114         WLAN_REASON_DISASSOC_QAP_EXCEED_TXOP = 35,
1115         WLAN_REASON_QSTA_LEAVE_QBSS = 36,
1116         WLAN_REASON_QSTA_NOT_USE = 37,
1117         WLAN_REASON_QSTA_REQUIRE_SETUP = 38,
1118         WLAN_REASON_QSTA_TIMEOUT = 39,
1119         WLAN_REASON_QSTA_CIPHER_NOT_SUPP = 45,
1120         /* 802.11s */
1121         WLAN_REASON_MESH_PEER_CANCELED = 52,
1122         WLAN_REASON_MESH_MAX_PEERS = 53,
1123         WLAN_REASON_MESH_CONFIG = 54,
1124         WLAN_REASON_MESH_CLOSE = 55,
1125         WLAN_REASON_MESH_MAX_RETRIES = 56,
1126         WLAN_REASON_MESH_CONFIRM_TIMEOUT = 57,
1127         WLAN_REASON_MESH_INVALID_GTK = 58,
1128         WLAN_REASON_MESH_INCONSISTENT_PARAM = 59,
1129         WLAN_REASON_MESH_INVALID_SECURITY = 60,
1130         WLAN_REASON_MESH_PATH_ERROR = 61,
1131         WLAN_REASON_MESH_PATH_NOFORWARD = 62,
1132         WLAN_REASON_MESH_PATH_DEST_UNREACHABLE = 63,
1133         WLAN_REASON_MAC_EXISTS_IN_MBSS = 64,
1134         WLAN_REASON_MESH_CHAN_REGULATORY = 65,
1135         WLAN_REASON_MESH_CHAN = 66,
1136 };
1137
1138
1139 /* Information Element IDs */
1140 enum ieee80211_eid {
1141         WLAN_EID_SSID = 0,
1142         WLAN_EID_SUPP_RATES = 1,
1143         WLAN_EID_FH_PARAMS = 2,
1144         WLAN_EID_DS_PARAMS = 3,
1145         WLAN_EID_CF_PARAMS = 4,
1146         WLAN_EID_TIM = 5,
1147         WLAN_EID_IBSS_PARAMS = 6,
1148         WLAN_EID_CHALLENGE = 16,
1149
1150         WLAN_EID_COUNTRY = 7,
1151         WLAN_EID_HP_PARAMS = 8,
1152         WLAN_EID_HP_TABLE = 9,
1153         WLAN_EID_REQUEST = 10,
1154
1155         WLAN_EID_QBSS_LOAD = 11,
1156         WLAN_EID_EDCA_PARAM_SET = 12,
1157         WLAN_EID_TSPEC = 13,
1158         WLAN_EID_TCLAS = 14,
1159         WLAN_EID_SCHEDULE = 15,
1160         WLAN_EID_TS_DELAY = 43,
1161         WLAN_EID_TCLAS_PROCESSING = 44,
1162         WLAN_EID_QOS_CAPA = 46,
1163         /* 802.11s */
1164         WLAN_EID_MESH_CONFIG = 113,
1165         WLAN_EID_MESH_ID = 114,
1166         WLAN_EID_LINK_METRIC_REPORT = 115,
1167         WLAN_EID_CONGESTION_NOTIFICATION = 116,
1168         /* Note that the Peer Link IE has been replaced with the similar
1169          * Peer Management IE.  We will keep the former definition until mesh
1170          * code is changed to comply with latest 802.11s drafts.
1171          */
1172         WLAN_EID_PEER_LINK = 55,  /* no longer in 802.11s drafts */
1173         WLAN_EID_PEER_MGMT = 117,
1174         WLAN_EID_CHAN_SWITCH_PARAM = 118,
1175         WLAN_EID_MESH_AWAKE_WINDOW = 119,
1176         WLAN_EID_BEACON_TIMING = 120,
1177         WLAN_EID_MCCAOP_SETUP_REQ = 121,
1178         WLAN_EID_MCCAOP_SETUP_RESP = 122,
1179         WLAN_EID_MCCAOP_ADVERT = 123,
1180         WLAN_EID_MCCAOP_TEARDOWN = 124,
1181         WLAN_EID_GANN = 125,
1182         WLAN_EID_RANN = 126,
1183         WLAN_EID_PREQ = 130,
1184         WLAN_EID_PREP = 131,
1185         WLAN_EID_PERR = 132,
1186         WLAN_EID_PXU = 137,
1187         WLAN_EID_PXUC = 138,
1188         WLAN_EID_AUTH_MESH_PEER_EXCH = 139,
1189         WLAN_EID_MIC = 140,
1190
1191         WLAN_EID_PWR_CONSTRAINT = 32,
1192         WLAN_EID_PWR_CAPABILITY = 33,
1193         WLAN_EID_TPC_REQUEST = 34,
1194         WLAN_EID_TPC_REPORT = 35,
1195         WLAN_EID_SUPPORTED_CHANNELS = 36,
1196         WLAN_EID_CHANNEL_SWITCH = 37,
1197         WLAN_EID_MEASURE_REQUEST = 38,
1198         WLAN_EID_MEASURE_REPORT = 39,
1199         WLAN_EID_QUIET = 40,
1200         WLAN_EID_IBSS_DFS = 41,
1201
1202         WLAN_EID_ERP_INFO = 42,
1203         WLAN_EID_EXT_SUPP_RATES = 50,
1204
1205         WLAN_EID_HT_CAPABILITY = 45,
1206         WLAN_EID_HT_INFORMATION = 61,
1207
1208         WLAN_EID_RSN = 48,
1209         WLAN_EID_MMIE = 76,
1210         WLAN_EID_WPA = 221,
1211         WLAN_EID_GENERIC = 221,
1212         WLAN_EID_VENDOR_SPECIFIC = 221,
1213         WLAN_EID_QOS_PARAMETER = 222,
1214
1215         WLAN_EID_AP_CHAN_REPORT = 51,
1216         WLAN_EID_NEIGHBOR_REPORT = 52,
1217         WLAN_EID_RCPI = 53,
1218         WLAN_EID_BSS_AVG_ACCESS_DELAY = 63,
1219         WLAN_EID_ANTENNA_INFO = 64,
1220         WLAN_EID_RSNI = 65,
1221         WLAN_EID_MEASUREMENT_PILOT_TX_INFO = 66,
1222         WLAN_EID_BSS_AVAILABLE_CAPACITY = 67,
1223         WLAN_EID_BSS_AC_ACCESS_DELAY = 68,
1224         WLAN_EID_RRM_ENABLED_CAPABILITIES = 70,
1225         WLAN_EID_MULTIPLE_BSSID = 71,
1226         WLAN_EID_BSS_COEX_2040 = 72,
1227         WLAN_EID_OVERLAP_BSS_SCAN_PARAM = 74,
1228         WLAN_EID_EXT_CAPABILITY = 127,
1229
1230         WLAN_EID_MOBILITY_DOMAIN = 54,
1231         WLAN_EID_FAST_BSS_TRANSITION = 55,
1232         WLAN_EID_TIMEOUT_INTERVAL = 56,
1233         WLAN_EID_RIC_DATA = 57,
1234         WLAN_EID_RIC_DESCRIPTOR = 75,
1235
1236         WLAN_EID_DSE_REGISTERED_LOCATION = 58,
1237         WLAN_EID_SUPPORTED_REGULATORY_CLASSES = 59,
1238         WLAN_EID_EXT_CHANSWITCH_ANN = 60,
1239 };
1240
1241 /* Action category code */
1242 enum ieee80211_category {
1243         WLAN_CATEGORY_SPECTRUM_MGMT = 0,
1244         WLAN_CATEGORY_QOS = 1,
1245         WLAN_CATEGORY_DLS = 2,
1246         WLAN_CATEGORY_BACK = 3,
1247         WLAN_CATEGORY_PUBLIC = 4,
1248         WLAN_CATEGORY_HT = 7,
1249         WLAN_CATEGORY_SA_QUERY = 8,
1250         WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION = 9,
1251         WLAN_CATEGORY_MESH_ACTION = 13,
1252         WLAN_CATEGORY_MULTIHOP_ACTION = 14,
1253         WLAN_CATEGORY_SELF_PROTECTED = 15,
1254         WLAN_CATEGORY_WMM = 17,
1255         /* TODO: remove MESH_PLINK and MESH_PATH_SEL after */
1256         /*       mesh is updated to current 802.11s draft  */
1257         WLAN_CATEGORY_MESH_PLINK = 30,
1258         WLAN_CATEGORY_MESH_PATH_SEL = 32,
1259         WLAN_CATEGORY_VENDOR_SPECIFIC_PROTECTED = 126,
1260         WLAN_CATEGORY_VENDOR_SPECIFIC = 127,
1261 };
1262
1263 /* SPECTRUM_MGMT action code */
1264 enum ieee80211_spectrum_mgmt_actioncode {
1265         WLAN_ACTION_SPCT_MSR_REQ = 0,
1266         WLAN_ACTION_SPCT_MSR_RPRT = 1,
1267         WLAN_ACTION_SPCT_TPC_REQ = 2,
1268         WLAN_ACTION_SPCT_TPC_RPRT = 3,
1269         WLAN_ACTION_SPCT_CHL_SWITCH = 4,
1270 };
1271
1272 /* HT action codes */
1273 enum ieee80211_ht_actioncode {
1274         WLAN_HT_ACTION_NOTIFY_CHANWIDTH = 0,
1275         WLAN_HT_ACTION_SMPS = 1,
1276         WLAN_HT_ACTION_PSMP = 2,
1277         WLAN_HT_ACTION_PCO_PHASE = 3,
1278         WLAN_HT_ACTION_CSI = 4,
1279         WLAN_HT_ACTION_NONCOMPRESSED_BF = 5,
1280         WLAN_HT_ACTION_COMPRESSED_BF = 6,
1281         WLAN_HT_ACTION_ASEL_IDX_FEEDBACK = 7,
1282 };
1283
1284 /* Security key length */
1285 enum ieee80211_key_len {
1286         WLAN_KEY_LEN_WEP40 = 5,
1287         WLAN_KEY_LEN_WEP104 = 13,
1288         WLAN_KEY_LEN_CCMP = 16,
1289         WLAN_KEY_LEN_TKIP = 32,
1290         WLAN_KEY_LEN_AES_CMAC = 16,
1291 };
1292
1293 /**
1294  * enum - mesh path selection protocol identifier
1295  *
1296  * @IEEE80211_PATH_PROTOCOL_HWMP: the default path selection protocol
1297  * @IEEE80211_PATH_PROTOCOL_VENDOR: a vendor specific protocol that will
1298  * be specified in a vendor specific information element
1299  */
1300 enum {
1301         IEEE80211_PATH_PROTOCOL_HWMP = 0,
1302         IEEE80211_PATH_PROTOCOL_VENDOR = 255,
1303 };
1304
1305 /**
1306  * enum - mesh path selection metric identifier
1307  *
1308  * @IEEE80211_PATH_METRIC_AIRTIME: the default path selection metric
1309  * @IEEE80211_PATH_METRIC_VENDOR: a vendor specific metric that will be
1310  * specified in a vendor specific information element
1311  */
1312 enum {
1313         IEEE80211_PATH_METRIC_AIRTIME = 0,
1314         IEEE80211_PATH_METRIC_VENDOR = 255,
1315 };
1316
1317
1318 /*
1319  * IEEE 802.11-2007 7.3.2.9 Country information element
1320  *
1321  * Minimum length is 8 octets, ie len must be evenly
1322  * divisible by 2
1323  */
1324
1325 /* Although the spec says 8 I'm seeing 6 in practice */
1326 #define IEEE80211_COUNTRY_IE_MIN_LEN    6
1327
1328 /*
1329  * For regulatory extension stuff see IEEE 802.11-2007
1330  * Annex I (page 1141) and Annex J (page 1147). Also
1331  * review 7.3.2.9.
1332  *
1333  * When dot11RegulatoryClassesRequired is true and the
1334  * first_channel/reg_extension_id is >= 201 then the IE
1335  * compromises of the 'ext' struct represented below:
1336  *
1337  *  - Regulatory extension ID - when generating IE this just needs
1338  *    to be monotonically increasing for each triplet passed in
1339  *    the IE
1340  *  - Regulatory class - index into set of rules
1341  *  - Coverage class - index into air propagation time (Table 7-27),
1342  *    in microseconds, you can compute the air propagation time from
1343  *    the index by multiplying by 3, so index 10 yields a propagation
1344  *    of 10 us. Valid values are 0-31, values 32-255 are not defined
1345  *    yet. A value of 0 inicates air propagation of <= 1 us.
1346  *
1347  *  See also Table I.2 for Emission limit sets and table
1348  *  I.3 for Behavior limit sets. Table J.1 indicates how to map
1349  *  a reg_class to an emission limit set and behavior limit set.
1350  */
1351 #define IEEE80211_COUNTRY_EXTENSION_ID 201
1352
1353 /*
1354  *  Channels numbers in the IE must be monotonically increasing
1355  *  if dot11RegulatoryClassesRequired is not true.
1356  *
1357  *  If dot11RegulatoryClassesRequired is true consecutive
1358  *  subband triplets following a regulatory triplet shall
1359  *  have monotonically increasing first_channel number fields.
1360  *
1361  *  Channel numbers shall not overlap.
1362  *
1363  *  Note that max_power is signed.
1364  */
1365 struct ieee80211_country_ie_triplet {
1366         union {
1367                 struct {
1368                         u8 first_channel;
1369                         u8 num_channels;
1370                         s8 max_power;
1371                 } __attribute__ ((packed)) chans;
1372                 struct {
1373                         u8 reg_extension_id;
1374                         u8 reg_class;
1375                         u8 coverage_class;
1376                 } __attribute__ ((packed)) ext;
1377         };
1378 } __attribute__ ((packed));
1379
1380 enum ieee80211_timeout_interval_type {
1381         WLAN_TIMEOUT_REASSOC_DEADLINE = 1 /* 802.11r */,
1382         WLAN_TIMEOUT_KEY_LIFETIME = 2 /* 802.11r */,
1383         WLAN_TIMEOUT_ASSOC_COMEBACK = 3 /* 802.11w */,
1384 };
1385
1386 /* BACK action code */
1387 enum ieee80211_back_actioncode {
1388         WLAN_ACTION_ADDBA_REQ = 0,
1389         WLAN_ACTION_ADDBA_RESP = 1,
1390         WLAN_ACTION_DELBA = 2,
1391 };
1392
1393 /* BACK (block-ack) parties */
1394 enum ieee80211_back_parties {
1395         WLAN_BACK_RECIPIENT = 0,
1396         WLAN_BACK_INITIATOR = 1,
1397 };
1398
1399 /* SA Query action */
1400 enum ieee80211_sa_query_action {
1401         WLAN_ACTION_SA_QUERY_REQUEST = 0,
1402         WLAN_ACTION_SA_QUERY_RESPONSE = 1,
1403 };
1404
1405
1406 /* A-MSDU 802.11n */
1407 #define IEEE80211_QOS_CONTROL_A_MSDU_PRESENT 0x0080
1408
1409 /* cipher suite selectors */
1410 #define WLAN_CIPHER_SUITE_USE_GROUP     0x000FAC00
1411 #define WLAN_CIPHER_SUITE_WEP40         0x000FAC01
1412 #define WLAN_CIPHER_SUITE_TKIP          0x000FAC02
1413 /* reserved:                            0x000FAC03 */
1414 #define WLAN_CIPHER_SUITE_CCMP          0x000FAC04
1415 #define WLAN_CIPHER_SUITE_WEP104        0x000FAC05
1416 #define WLAN_CIPHER_SUITE_AES_CMAC      0x000FAC06
1417
1418 /* AKM suite selectors */
1419 #define WLAN_AKM_SUITE_8021X            0x000FAC01
1420 #define WLAN_AKM_SUITE_PSK              0x000FAC02
1421 #define WLAN_AKM_SUITE_SAE                      0x000FAC08
1422 #define WLAN_AKM_SUITE_FT_OVER_SAE      0x000FAC09
1423
1424 #define WLAN_MAX_KEY_LEN                32
1425
1426 #define WLAN_PMKID_LEN                  16
1427
1428 /**
1429  * ieee80211_get_qos_ctl - get pointer to qos control bytes
1430  * @hdr: the frame
1431  *
1432  * The qos ctrl bytes come after the frame_control, duration, seq_num
1433  * and 3 or 4 addresses of length ETH_ALEN.
1434  * 3 addr: 2 + 2 + 2 + 3*6 = 24
1435  * 4 addr: 2 + 2 + 2 + 4*6 = 30
1436  */
1437 static inline u8 *ieee80211_get_qos_ctl(struct ieee80211_hdr *hdr)
1438 {
1439         if (ieee80211_has_a4(hdr->frame_control))
1440                 return (u8 *)hdr + 30;
1441         else
1442                 return (u8 *)hdr + 24;
1443 }
1444
1445 /**
1446  * ieee80211_get_SA - get pointer to SA
1447  * @hdr: the frame
1448  *
1449  * Given an 802.11 frame, this function returns the offset
1450  * to the source address (SA). It does not verify that the
1451  * header is long enough to contain the address, and the
1452  * header must be long enough to contain the frame control
1453  * field.
1454  */
1455 static inline u8 *ieee80211_get_SA(struct ieee80211_hdr *hdr)
1456 {
1457         if (ieee80211_has_a4(hdr->frame_control))
1458                 return hdr->addr4;
1459         if (ieee80211_has_fromds(hdr->frame_control))
1460                 return hdr->addr3;
1461         return hdr->addr2;
1462 }
1463
1464 /**
1465  * ieee80211_get_DA - get pointer to DA
1466  * @hdr: the frame
1467  *
1468  * Given an 802.11 frame, this function returns the offset
1469  * to the destination address (DA). It does not verify that
1470  * the header is long enough to contain the address, and the
1471  * header must be long enough to contain the frame control
1472  * field.
1473  */
1474 static inline u8 *ieee80211_get_DA(struct ieee80211_hdr *hdr)
1475 {
1476         if (ieee80211_has_tods(hdr->frame_control))
1477                 return hdr->addr3;
1478         else
1479                 return hdr->addr1;
1480 }
1481
1482 /**
1483  * ieee80211_is_robust_mgmt_frame - check if frame is a robust management frame
1484  * @hdr: the frame (buffer must include at least the first octet of payload)
1485  */
1486 static inline bool ieee80211_is_robust_mgmt_frame(struct ieee80211_hdr *hdr)
1487 {
1488         if (ieee80211_is_disassoc(hdr->frame_control) ||
1489             ieee80211_is_deauth(hdr->frame_control))
1490                 return true;
1491
1492         if (ieee80211_is_action(hdr->frame_control)) {
1493                 u8 *category;
1494
1495                 /*
1496                  * Action frames, excluding Public Action frames, are Robust
1497                  * Management Frames. However, if we are looking at a Protected
1498                  * frame, skip the check since the data may be encrypted and
1499                  * the frame has already been found to be a Robust Management
1500                  * Frame (by the other end).
1501                  */
1502                 if (ieee80211_has_protected(hdr->frame_control))
1503                         return true;
1504                 category = ((u8 *) hdr) + 24;
1505                 return *category != WLAN_CATEGORY_PUBLIC &&
1506                         *category != WLAN_CATEGORY_HT &&
1507                         *category != WLAN_CATEGORY_VENDOR_SPECIFIC;
1508         }
1509
1510         return false;
1511 }
1512
1513 /**
1514  * ieee80211_fhss_chan_to_freq - get channel frequency
1515  * @channel: the FHSS channel
1516  *
1517  * Convert IEEE802.11 FHSS channel to frequency (MHz)
1518  * Ref IEEE 802.11-2007 section 14.6
1519  */
1520 static inline int ieee80211_fhss_chan_to_freq(int channel)
1521 {
1522         if ((channel > 1) && (channel < 96))
1523                 return channel + 2400;
1524         else
1525                 return -1;
1526 }
1527
1528 /**
1529  * ieee80211_freq_to_fhss_chan - get channel
1530  * @freq: the channels frequency
1531  *
1532  * Convert frequency (MHz) to IEEE802.11 FHSS channel
1533  * Ref IEEE 802.11-2007 section 14.6
1534  */
1535 static inline int ieee80211_freq_to_fhss_chan(int freq)
1536 {
1537         if ((freq > 2401) && (freq < 2496))
1538                 return freq - 2400;
1539         else
1540                 return -1;
1541 }
1542
1543 /**
1544  * ieee80211_dsss_chan_to_freq - get channel center frequency
1545  * @channel: the DSSS channel
1546  *
1547  * Convert IEEE802.11 DSSS channel to the center frequency (MHz).
1548  * Ref IEEE 802.11-2007 section 15.6
1549  */
1550 static inline int ieee80211_dsss_chan_to_freq(int channel)
1551 {
1552         if ((channel > 0) && (channel < 14))
1553                 return 2407 + (channel * 5);
1554         else if (channel == 14)
1555                 return 2484;
1556         else
1557                 return -1;
1558 }
1559
1560 /**
1561  * ieee80211_freq_to_dsss_chan - get channel
1562  * @freq: the frequency
1563  *
1564  * Convert frequency (MHz) to IEEE802.11 DSSS channel
1565  * Ref IEEE 802.11-2007 section 15.6
1566  *
1567  * This routine selects the channel with the closest center frequency.
1568  */
1569 static inline int ieee80211_freq_to_dsss_chan(int freq)
1570 {
1571         if ((freq >= 2410) && (freq < 2475))
1572                 return (freq - 2405) / 5;
1573         else if ((freq >= 2482) && (freq < 2487))
1574                 return 14;
1575         else
1576                 return -1;
1577 }
1578
1579 /* Convert IEEE802.11 HR DSSS channel to frequency (MHz) and back
1580  * Ref IEEE 802.11-2007 section 18.4.6.2
1581  *
1582  * The channels and frequencies are the same as those defined for DSSS
1583  */
1584 #define ieee80211_hr_chan_to_freq(chan) ieee80211_dsss_chan_to_freq(chan)
1585 #define ieee80211_freq_to_hr_chan(freq) ieee80211_freq_to_dsss_chan(freq)
1586
1587 /* Convert IEEE802.11 ERP channel to frequency (MHz) and back
1588  * Ref IEEE 802.11-2007 section 19.4.2
1589  */
1590 #define ieee80211_erp_chan_to_freq(chan) ieee80211_hr_chan_to_freq(chan)
1591 #define ieee80211_freq_to_erp_chan(freq) ieee80211_freq_to_hr_chan(freq)
1592
1593 /**
1594  * ieee80211_ofdm_chan_to_freq - get channel center frequency
1595  * @s_freq: starting frequency == (dotChannelStartingFactor/2) MHz
1596  * @channel: the OFDM channel
1597  *
1598  * Convert IEEE802.11 OFDM channel to center frequency (MHz)
1599  * Ref IEEE 802.11-2007 section 17.3.8.3.2
1600  */
1601 static inline int ieee80211_ofdm_chan_to_freq(int s_freq, int channel)
1602 {
1603         if ((channel > 0) && (channel <= 200) &&
1604             (s_freq >= 4000))
1605                 return s_freq + (channel * 5);
1606         else
1607                 return -1;
1608 }
1609
1610 /**
1611  * ieee80211_freq_to_ofdm_channel - get channel
1612  * @s_freq: starting frequency == (dotChannelStartingFactor/2) MHz
1613  * @freq: the frequency
1614  *
1615  * Convert frequency (MHz) to IEEE802.11 OFDM channel
1616  * Ref IEEE 802.11-2007 section 17.3.8.3.2
1617  *
1618  * This routine selects the channel with the closest center frequency.
1619  */
1620 static inline int ieee80211_freq_to_ofdm_chan(int s_freq, int freq)
1621 {
1622         if ((freq > (s_freq + 2)) && (freq <= (s_freq + 1202)) &&
1623             (s_freq >= 4000))
1624                 return (freq + 2 - s_freq) / 5;
1625         else
1626                 return -1;
1627 }
1628
1629 /**
1630  * ieee80211_tu_to_usec - convert time units (TU) to microseconds
1631  * @tu: the TUs
1632  */
1633 static inline unsigned long ieee80211_tu_to_usec(unsigned long tu)
1634 {
1635         return 1024 * tu;
1636 }
1637
1638 /**
1639  * ieee80211_check_tim - check if AID bit is set in TIM
1640  * @tim: the TIM IE
1641  * @tim_len: length of the TIM IE
1642  * @aid: the AID to look for
1643  */
1644 static inline bool ieee80211_check_tim(struct ieee80211_tim_ie *tim,
1645                                        u8 tim_len, u16 aid)
1646 {
1647         u8 mask;
1648         u8 index, indexn1, indexn2;
1649
1650         if (unlikely(!tim || tim_len < sizeof(*tim)))
1651                 return false;
1652
1653         aid &= 0x3fff;
1654         index = aid / 8;
1655         mask  = 1 << (aid & 7);
1656
1657         indexn1 = tim->bitmap_ctrl & 0xfe;
1658         indexn2 = tim_len + indexn1 - 4;
1659
1660         if (index < indexn1 || index > indexn2)
1661                 return false;
1662
1663         index -= indexn1;
1664
1665         return !!(tim->virtual_map[index] & mask);
1666 }
1667
1668 #endif /* LINUX_IEEE80211_H */