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 #define IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK  0x0f
 123
 124 /* U-APSD queues for WMM IEs sent by STA */
 125 #define IEEE80211_WMM_IE_STA_QOSINFO_AC_VO      (1<<0)
 126 #define IEEE80211_WMM_IE_STA_QOSINFO_AC_VI      (1<<1)
 127 #define IEEE80211_WMM_IE_STA_QOSINFO_AC_BK      (1<<2)
 128 #define IEEE80211_WMM_IE_STA_QOSINFO_AC_BE      (1<<3)
 129 #define IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK    0x0f
 130
 131 /* U-APSD max SP length for WMM IEs sent by STA */
 132 #define IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL     0x00
 133 #define IEEE80211_WMM_IE_STA_QOSINFO_SP_2       0x01
 134 #define IEEE80211_WMM_IE_STA_QOSINFO_SP_4       0x02
 135 #define IEEE80211_WMM_IE_STA_QOSINFO_SP_6       0x03
 136 #define IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK    0x03
 137 #define IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT   5
 138
 139 #define IEEE80211_HT_CTL_LEN            4
 140
 141 struct ieee80211_hdr {
 142         __le16 frame_control;
 143         __le16 duration_id;
 144         u8 addr1[6];
 145         u8 addr2[6];
 146         u8 addr3[6];
 147         __le16 seq_ctrl;
 148         u8 addr4[6];
 149 } __attribute__ ((packed));
 150
 151 struct ieee80211_hdr_3addr {
 152         __le16 frame_control;
 153         __le16 duration_id;
 154         u8 addr1[6];
 155         u8 addr2[6];
 156         u8 addr3[6];
 157         __le16 seq_ctrl;
 158 } __attribute__ ((packed));
 159
 160 struct ieee80211_qos_hdr {
 161         __le16 frame_control;
 162         __le16 duration_id;
 163         u8 addr1[6];
 164         u8 addr2[6];
 165         u8 addr3[6];
 166         __le16 seq_ctrl;
 167         __le16 qos_ctrl;
 168 } __attribute__ ((packed));
 169
 170 /**
 171  * ieee80211_has_tods - check if IEEE80211_FCTL_TODS is set
 172  * @fc: frame control bytes in little-endian byteorder
 173  */
 174 static inline int ieee80211_has_tods(__le16 fc)
 175 {
 176         return (fc & cpu_to_le16(IEEE80211_FCTL_TODS)) != 0;
 177 }
 178
 179 /**
 180  * ieee80211_has_fromds - check if IEEE80211_FCTL_FROMDS is set
 181  * @fc: frame control bytes in little-endian byteorder
 182  */
 183 static inline int ieee80211_has_fromds(__le16 fc)
 184 {
 185         return (fc & cpu_to_le16(IEEE80211_FCTL_FROMDS)) != 0;
 186 }
 187
 188 /**
 189  * ieee80211_has_a4 - check if IEEE80211_FCTL_TODS and IEEE80211_FCTL_FROMDS are set
 190  * @fc: frame control bytes in little-endian byteorder
 191  */
 192 static inline int ieee80211_has_a4(__le16 fc)
 193 {
 194         __le16 tmp = cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS);
 195         return (fc & tmp) == tmp;
 196 }
 197
 198 /**
 199  * ieee80211_has_morefrags - check if IEEE80211_FCTL_MOREFRAGS is set
 200  * @fc: frame control bytes in little-endian byteorder
 201  */
 202 static inline int ieee80211_has_morefrags(__le16 fc)
 203 {
 204         return (fc & cpu_to_le16(IEEE80211_FCTL_MOREFRAGS)) != 0;
 205 }
 206
 207 /**
 208  * ieee80211_has_retry - check if IEEE80211_FCTL_RETRY is set
 209  * @fc: frame control bytes in little-endian byteorder
 210  */
 211 static inline int ieee80211_has_retry(__le16 fc)
 212 {
 213         return (fc & cpu_to_le16(IEEE80211_FCTL_RETRY)) != 0;
 214 }
 215
 216 /**
 217  * ieee80211_has_pm - check if IEEE80211_FCTL_PM is set
 218  * @fc: frame control bytes in little-endian byteorder
 219  */
 220 static inline int ieee80211_has_pm(__le16 fc)
 221 {
 222         return (fc & cpu_to_le16(IEEE80211_FCTL_PM)) != 0;
 223 }
 224
 225 /**
 226  * ieee80211_has_moredata - check if IEEE80211_FCTL_MOREDATA is set
 227  * @fc: frame control bytes in little-endian byteorder
 228  */
 229 static inline int ieee80211_has_moredata(__le16 fc)
 230 {
 231         return (fc & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) != 0;
 232 }
 233
 234 /**
 235  * ieee80211_has_protected - check if IEEE80211_FCTL_PROTECTED is set
 236  * @fc: frame control bytes in little-endian byteorder
 237  */
 238 static inline int ieee80211_has_protected(__le16 fc)
 239 {
 240         return (fc & cpu_to_le16(IEEE80211_FCTL_PROTECTED)) != 0;
 241 }
 242
 243 /**
 244  * ieee80211_has_order - check if IEEE80211_FCTL_ORDER is set
 245  * @fc: frame control bytes in little-endian byteorder
 246  */
 247 static inline int ieee80211_has_order(__le16 fc)
 248 {
 249         return (fc & cpu_to_le16(IEEE80211_FCTL_ORDER)) != 0;
 250 }
 251
 252 /**
 253  * ieee80211_is_mgmt - check if type is IEEE80211_FTYPE_MGMT
 254  * @fc: frame control bytes in little-endian byteorder
 255  */
 256 static inline int ieee80211_is_mgmt(__le16 fc)
 257 {
 258         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
 259                cpu_to_le16(IEEE80211_FTYPE_MGMT);
 260 }
 261
 262 /**
 263  * ieee80211_is_ctl - check if type is IEEE80211_FTYPE_CTL
 264  * @fc: frame control bytes in little-endian byteorder
 265  */
 266 static inline int ieee80211_is_ctl(__le16 fc)
 267 {
 268         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
 269                cpu_to_le16(IEEE80211_FTYPE_CTL);
 270 }
 271
 272 /**
 273  * ieee80211_is_data - check if type is IEEE80211_FTYPE_DATA
 274  * @fc: frame control bytes in little-endian byteorder
 275  */
 276 static inline int ieee80211_is_data(__le16 fc)
 277 {
 278         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
 279                cpu_to_le16(IEEE80211_FTYPE_DATA);
 280 }
 281
 282 /**
 283  * ieee80211_is_data_qos - check if type is IEEE80211_FTYPE_DATA and IEEE80211_STYPE_QOS_DATA is set
 284  * @fc: frame control bytes in little-endian byteorder
 285  */
 286 static inline int ieee80211_is_data_qos(__le16 fc)
 287 {
 288         /*
 289          * mask with QOS_DATA rather than IEEE80211_FCTL_STYPE as we just need
 290          * to check the one bit
 291          */
 292         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_STYPE_QOS_DATA)) ==
 293                cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_DATA);
 294 }
 295
 296 /**
 297  * ieee80211_is_data_present - check if type is IEEE80211_FTYPE_DATA and has data
 298  * @fc: frame control bytes in little-endian byteorder
 299  */
 300 static inline int ieee80211_is_data_present(__le16 fc)
 301 {
 302         /*
 303          * mask with 0x40 and test that that bit is clear to only return true
 304          * for the data-containing substypes.
 305          */
 306         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | 0x40)) ==
 307                cpu_to_le16(IEEE80211_FTYPE_DATA);
 308 }
 309
 310 /**
 311  * ieee80211_is_assoc_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ASSOC_REQ
 312  * @fc: frame control bytes in little-endian byteorder
 313  */
 314 static inline int ieee80211_is_assoc_req(__le16 fc)
 315 {
 316         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 317                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ASSOC_REQ);
 318 }
 319
 320 /**
 321  * ieee80211_is_assoc_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ASSOC_RESP
 322  * @fc: frame control bytes in little-endian byteorder
 323  */
 324 static inline int ieee80211_is_assoc_resp(__le16 fc)
 325 {
 326         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 327                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ASSOC_RESP);
 328 }
 329
 330 /**
 331  * ieee80211_is_reassoc_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_REASSOC_REQ
 332  * @fc: frame control bytes in little-endian byteorder
 333  */
 334 static inline int ieee80211_is_reassoc_req(__le16 fc)
 335 {
 336         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 337                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_REASSOC_REQ);
 338 }
 339
 340 /**
 341  * ieee80211_is_reassoc_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_REASSOC_RESP
 342  * @fc: frame control bytes in little-endian byteorder
 343  */
 344 static inline int ieee80211_is_reassoc_resp(__le16 fc)
 345 {
 346         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 347                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_REASSOC_RESP);
 348 }
 349
 350 /**
 351  * ieee80211_is_probe_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_PROBE_REQ
 352  * @fc: frame control bytes in little-endian byteorder
 353  */
 354 static inline int ieee80211_is_probe_req(__le16 fc)
 355 {
 356         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 357                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_REQ);
 358 }
 359
 360 /**
 361  * ieee80211_is_probe_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_PROBE_RESP
 362  * @fc: frame control bytes in little-endian byteorder
 363  */
 364 static inline int ieee80211_is_probe_resp(__le16 fc)
 365 {
 366         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 367                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_RESP);
 368 }
 369
 370 /**
 371  * ieee80211_is_beacon - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_BEACON
 372  * @fc: frame control bytes in little-endian byteorder
 373  */
 374 static inline int ieee80211_is_beacon(__le16 fc)
 375 {
 376         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 377                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON);
 378 }
 379
 380 /**
 381  * ieee80211_is_atim - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ATIM
 382  * @fc: frame control bytes in little-endian byteorder
 383  */
 384 static inline int ieee80211_is_atim(__le16 fc)
 385 {
 386         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 387                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ATIM);
 388 }
 389
 390 /**
 391  * ieee80211_is_disassoc - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_DISASSOC
 392  * @fc: frame control bytes in little-endian byteorder
 393  */
 394 static inline int ieee80211_is_disassoc(__le16 fc)
 395 {
 396         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 397                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DISASSOC);
 398 }
 399
 400 /**
 401  * ieee80211_is_auth - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_AUTH
 402  * @fc: frame control bytes in little-endian byteorder
 403  */
 404 static inline int ieee80211_is_auth(__le16 fc)
 405 {
 406         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 407                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH);
 408 }
 409
 410 /**
 411  * ieee80211_is_deauth - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_DEAUTH
 412  * @fc: frame control bytes in little-endian byteorder
 413  */
 414 static inline int ieee80211_is_deauth(__le16 fc)
 415 {
 416         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 417                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DEAUTH);
 418 }
 419
 420 /**
 421  * ieee80211_is_action - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ACTION
 422  * @fc: frame control bytes in little-endian byteorder
 423  */
 424 static inline int ieee80211_is_action(__le16 fc)
 425 {
 426         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 427                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION);
 428 }
 429
 430 /**
 431  * ieee80211_is_back_req - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_BACK_REQ
 432  * @fc: frame control bytes in little-endian byteorder
 433  */
 434 static inline int ieee80211_is_back_req(__le16 fc)
 435 {
 436         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 437                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK_REQ);
 438 }
 439
 440 /**
 441  * ieee80211_is_back - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_BACK
 442  * @fc: frame control bytes in little-endian byteorder
 443  */
 444 static inline int ieee80211_is_back(__le16 fc)
 445 {
 446         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 447                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK);
 448 }
 449
 450 /**
 451  * ieee80211_is_pspoll - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_PSPOLL
 452  * @fc: frame control bytes in little-endian byteorder
 453  */
 454 static inline int ieee80211_is_pspoll(__le16 fc)
 455 {
 456         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 457                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
 458 }
 459
 460 /**
 461  * ieee80211_is_rts - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_RTS
 462  * @fc: frame control bytes in little-endian byteorder
 463  */
 464 static inline int ieee80211_is_rts(__le16 fc)
 465 {
 466         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 467                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
 468 }
 469
 470 /**
 471  * ieee80211_is_cts - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CTS
 472  * @fc: frame control bytes in little-endian byteorder
 473  */
 474 static inline int ieee80211_is_cts(__le16 fc)
 475 {
 476         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 477                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
 478 }
 479
 480 /**
 481  * ieee80211_is_ack - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_ACK
 482  * @fc: frame control bytes in little-endian byteorder
 483  */
 484 static inline int ieee80211_is_ack(__le16 fc)
 485 {
 486         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 487                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK);
 488 }
 489
 490 /**
 491  * ieee80211_is_cfend - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CFEND
 492  * @fc: frame control bytes in little-endian byteorder
 493  */
 494 static inline int ieee80211_is_cfend(__le16 fc)
 495 {
 496         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 497                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CFEND);
 498 }
 499
 500 /**
 501  * ieee80211_is_cfendack - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CFENDACK
 502  * @fc: frame control bytes in little-endian byteorder
 503  */
 504 static inline int ieee80211_is_cfendack(__le16 fc)
 505 {
 506         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 507                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CFENDACK);
 508 }
 509
 510 /**
 511  * ieee80211_is_nullfunc - check if frame is a regular (non-QoS) nullfunc frame
 512  * @fc: frame control bytes in little-endian byteorder
 513  */
 514 static inline int ieee80211_is_nullfunc(__le16 fc)
 515 {
 516         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 517                cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC);
 518 }
 519
 520 /**
 521  * ieee80211_is_qos_nullfunc - check if frame is a QoS nullfunc frame
 522  * @fc: frame control bytes in little-endian byteorder
 523  */
 524 static inline int ieee80211_is_qos_nullfunc(__le16 fc)
 525 {
 526         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 527                cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_NULLFUNC);
 528 }
 529
 530 static inline unsigned int ieee80211_hdrlen(__le16 fc)
 531 {
 532         unsigned int hdrlen = 24;
 533
 534         if (ieee80211_has_a4(fc))
 535                 hdrlen = 30;
 536
 537         if (ieee80211_is_data_qos(fc)) {
 538                 hdrlen += IEEE80211_QOS_CTL_LEN;
 539                 if (ieee80211_has_order(fc))
 540                         hdrlen += IEEE80211_HT_CTL_LEN;
 541         }
 542
 543         return hdrlen;
 544 }
 545
 546 struct ieee80211s_hdr {
 547         u8 flags;
 548         u8 ttl;
 549         __le32 seqnum;
 550         u8 eaddr1[6];
 551         u8 eaddr2[6];
 552 } __attribute__ ((packed));
 553
 554 /* Mesh flags */
 555 #define MESH_FLAGS_AE_A4        0x1
 556 #define MESH_FLAGS_AE_A5_A6     0x2
 557 #define MESH_FLAGS_AE           0x3
 558 #define MESH_FLAGS_PS_DEEP      0x4
 559
 560 /**
 561  * struct ieee80211_quiet_ie
 562  *
 563  * This structure refers to "Quiet information element"
 564  */
 565 struct ieee80211_quiet_ie {
 566         u8 count;
 567         u8 period;
 568         __le16 duration;
 569         __le16 offset;
 570 } __attribute__ ((packed));
 571
 572 /**
 573  * struct ieee80211_msrment_ie
 574  *
 575  * This structure refers to "Measurement Request/Report information element"
 576  */
 577 struct ieee80211_msrment_ie {
 578         u8 token;
 579         u8 mode;
 580         u8 type;
 581         u8 request[0];
 582 } __attribute__ ((packed));
 583
 584 /**
 585  * struct ieee80211_channel_sw_ie
 586  *
 587  * This structure refers to "Channel Switch Announcement information element"
 588  */
 589 struct ieee80211_channel_sw_ie {
 590         u8 mode;
 591         u8 new_ch_num;
 592         u8 count;
 593 } __attribute__ ((packed));
 594
 595 /**
 596  * struct ieee80211_tim
 597  *
 598  * This structure refers to "Traffic Indication Map information element"
 599  */
 600 struct ieee80211_tim_ie {
 601         u8 dtim_count;
 602         u8 dtim_period;
 603         u8 bitmap_ctrl;
 604         /* variable size: 1 - 251 bytes */
 605         u8 virtual_map[1];
 606 } __attribute__ ((packed));
 607
 608 /**
 609  * struct ieee80211_meshconf_ie
 610  *
 611  * This structure refers to "Mesh Configuration information element"
 612  */
 613 struct ieee80211_meshconf_ie {
 614         u8 meshconf_psel;
 615         u8 meshconf_pmetric;
 616         u8 meshconf_congest;
 617         u8 meshconf_synch;
 618         u8 meshconf_auth;
 619         u8 meshconf_form;
 620         u8 meshconf_cap;
 621 } __attribute__ ((packed));
 622
 623 /**
 624  * struct ieee80211_rann_ie
 625  *
 626  * This structure refers to "Root Announcement information element"
 627  */
 628 struct ieee80211_rann_ie {
 629         u8 rann_flags;
 630         u8 rann_hopcount;
 631         u8 rann_ttl;
 632         u8 rann_addr[6];
 633         u32 rann_seq;
 634         u32 rann_metric;
 635 } __attribute__ ((packed));
 636
 637 #define WLAN_SA_QUERY_TR_ID_LEN 2
 638
 639 struct ieee80211_mgmt {
 640         __le16 frame_control;
 641         __le16 duration;
 642         u8 da[6];
 643         u8 sa[6];
 644         u8 bssid[6];
 645         __le16 seq_ctrl;
 646         union {
 647                 struct {
 648                         __le16 auth_alg;
 649                         __le16 auth_transaction;
 650                         __le16 status_code;
 651                         /* possibly followed by Challenge text */
 652                         u8 variable[0];
 653                 } __attribute__ ((packed)) auth;
 654                 struct {
 655                         __le16 reason_code;
 656                 } __attribute__ ((packed)) deauth;
 657                 struct {
 658                         __le16 capab_info;
 659                         __le16 listen_interval;
 660                         /* followed by SSID and Supported rates */
 661                         u8 variable[0];
 662                 } __attribute__ ((packed)) assoc_req;
 663                 struct {
 664                         __le16 capab_info;
 665                         __le16 status_code;
 666                         __le16 aid;
 667                         /* followed by Supported rates */
 668                         u8 variable[0];
 669                 } __attribute__ ((packed)) assoc_resp, reassoc_resp;
 670                 struct {
 671                         __le16 capab_info;
 672                         __le16 listen_interval;
 673                         u8 current_ap[6];
 674                         /* followed by SSID and Supported rates */
 675                         u8 variable[0];
 676                 } __attribute__ ((packed)) reassoc_req;
 677                 struct {
 678                         __le16 reason_code;
 679                 } __attribute__ ((packed)) disassoc;
 680                 struct {
 681                         __le64 timestamp;
 682                         __le16 beacon_int;
 683                         __le16 capab_info;
 684                         /* followed by some of SSID, Supported rates,
 685                          * FH Params, DS Params, CF Params, IBSS Params, TIM */
 686                         u8 variable[0];
 687                 } __attribute__ ((packed)) beacon;
 688                 struct {
 689                         /* only variable items: SSID, Supported rates */
 690                         u8 variable[0];
 691                 } __attribute__ ((packed)) probe_req;
 692                 struct {
 693                         __le64 timestamp;
 694                         __le16 beacon_int;
 695                         __le16 capab_info;
 696                         /* followed by some of SSID, Supported rates,
 697                          * FH Params, DS Params, CF Params, IBSS Params */
 698                         u8 variable[0];
 699                 } __attribute__ ((packed)) probe_resp;
 700                 struct {
 701                         u8 category;
 702                         union {
 703                                 struct {
 704                                         u8 action_code;
 705                                         u8 dialog_token;
 706                                         u8 status_code;
 707                                         u8 variable[0];
 708                                 } __attribute__ ((packed)) wme_action;
 709                                 struct{
 710                                         u8 action_code;
 711                                         u8 element_id;
 712                                         u8 length;
 713                                         struct ieee80211_channel_sw_ie sw_elem;
 714                                 } __attribute__((packed)) chan_switch;
 715                                 struct{
 716                                         u8 action_code;
 717                                         u8 dialog_token;
 718                                         u8 element_id;
 719                                         u8 length;
 720                                         struct ieee80211_msrment_ie msr_elem;
 721                                 } __attribute__((packed)) measurement;
 722                                 struct{
 723                                         u8 action_code;
 724                                         u8 dialog_token;
 725                                         __le16 capab;
 726                                         __le16 timeout;
 727                                         __le16 start_seq_num;
 728                                 } __attribute__((packed)) addba_req;
 729                                 struct{
 730                                         u8 action_code;
 731                                         u8 dialog_token;
 732                                         __le16 status;
 733                                         __le16 capab;
 734                                         __le16 timeout;
 735                                 } __attribute__((packed)) addba_resp;
 736                                 struct{
 737                                         u8 action_code;
 738                                         __le16 params;
 739                                         __le16 reason_code;
 740                                 } __attribute__((packed)) delba;
 741                                 struct{
 742                                         u8 action_code;
 743                                         /* capab_info for open and confirm,
 744                                          * reason for close
 745                                          */
 746                                         __le16 aux;
 747                                         /* Followed in plink_confirm by status
 748                                          * code, AID and supported rates,
 749                                          * and directly by supported rates in
 750                                          * plink_open and plink_close
 751                                          */
 752                                         u8 variable[0];
 753                                 } __attribute__((packed)) plink_action;
 754                                 struct{
 755                                         u8 action_code;
 756                                         u8 variable[0];
 757                                 } __attribute__((packed)) mesh_action;
 758                                 struct {
 759                                         u8 action;
 760                                         u8 trans_id[WLAN_SA_QUERY_TR_ID_LEN];
 761                                 } __attribute__ ((packed)) sa_query;
 762                                 struct {
 763                                         u8 action;
 764                                         u8 smps_control;
 765                                 } __attribute__ ((packed)) ht_smps;
 766                         } u;
 767                 } __attribute__ ((packed)) action;
 768         } u;
 769 } __attribute__ ((packed));
 770
 771 /* mgmt header + 1 byte category code */
 772 #define IEEE80211_MIN_ACTION_SIZE offsetof(struct ieee80211_mgmt, u.action.u)
 773
 774
 775 /* Management MIC information element (IEEE 802.11w) */
 776 struct ieee80211_mmie {
 777         u8 element_id;
 778         u8 length;
 779         __le16 key_id;
 780         u8 sequence_number[6];
 781         u8 mic[8];
 782 } __attribute__ ((packed));
 783
 784 /* Control frames */
 785 struct ieee80211_rts {
 786         __le16 frame_control;
 787         __le16 duration;
 788         u8 ra[6];
 789         u8 ta[6];
 790 } __attribute__ ((packed));
 791
 792 struct ieee80211_cts {
 793         __le16 frame_control;
 794         __le16 duration;
 795         u8 ra[6];
 796 } __attribute__ ((packed));
 797
 798 struct ieee80211_pspoll {
 799         __le16 frame_control;
 800         __le16 aid;
 801         u8 bssid[6];
 802         u8 ta[6];
 803 } __attribute__ ((packed));
 804
 805 /**
 806  * struct ieee80211_bar - HT Block Ack Request
 807  *
 808  * This structure refers to "HT BlockAckReq" as
 809  * described in 802.11n draft section 7.2.1.7.1
 810  */
 811 struct ieee80211_bar {
 812         __le16 frame_control;
 813         __le16 duration;
 814         __u8 ra[6];
 815         __u8 ta[6];
 816         __le16 control;
 817         __le16 start_seq_num;
 818 } __attribute__((packed)) __aligned(4);
 819
 820 /* 802.11 BA(R) control masks */
 821 #define IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL     0x0000
 822 #define IEEE80211_BAR_CTRL_MULTI_TID             0x0002
 823 #define IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA  0x0004
 824
 825 /**
 826  * struct ieee80211_ba - HT Block Ack
 827  *
 828  * This structure refers to "HT BlockAck" as
 829  * described in 802.11n draft section 7.2.1.8.1
 830  */
 831 struct ieee80211_ba {
 832         __le16 frame_control;
 833         __le16 duration;
 834         u8 ra[6];
 835         u8 ta[6];
 836         __le16 control;
 837
 838         __le16 start_seq_num;
 839         u8 bitmap[8];
 840 } __attribute__((packed));
 841
 842 #define IEEE80211_HT_MCS_MASK_LEN               10
 843
 844 /**
 845  * struct ieee80211_mcs_info - MCS information
 846  * @rx_mask: RX mask
 847  * @rx_highest: highest supported RX rate. If set represents
 848  *      the highest supported RX data rate in units of 1 Mbps.
 849  *      If this field is 0 this value should not be used to
 850  *      consider the highest RX data rate supported.
 851  * @tx_params: TX parameters
 852  */
 853 struct ieee80211_mcs_info {
 854         u8 rx_mask[IEEE80211_HT_MCS_MASK_LEN];
 855         __le16 rx_highest;
 856         u8 tx_params;
 857         u8 reserved[3];
 858 } __attribute__((packed));
 859
 860 /* 802.11n HT capability MSC set */
 861 #define IEEE80211_HT_MCS_RX_HIGHEST_MASK        0x3ff
 862 #define IEEE80211_HT_MCS_TX_DEFINED             0x01
 863 #define IEEE80211_HT_MCS_TX_RX_DIFF             0x02
 864 /* value 0 == 1 stream etc */
 865 #define IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK    0x0C
 866 #define IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT   2
 867 #define         IEEE80211_HT_MCS_TX_MAX_STREAMS 4
 868 #define IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION  0x10
 869
 870 /*
 871  * 802.11n D5.0 20.3.5 / 20.6 says:
 872  * - indices 0 to 7 and 32 are single spatial stream
 873  * - 8 to 31 are multiple spatial streams using equal modulation
 874  *   [8..15 for two streams, 16..23 for three and 24..31 for four]
 875  * - remainder are multiple spatial streams using unequal modulation
 876  */
 877 #define IEEE80211_HT_MCS_UNEQUAL_MODULATION_START 33
 878 #define IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE \
 879         (IEEE80211_HT_MCS_UNEQUAL_MODULATION_START / 8)
 880
 881 /**
 882  * struct ieee80211_ht_cap - HT capabilities
 883  *
 884  * This structure is the "HT capabilities element" as
 885  * described in 802.11n D5.0 7.3.2.57
 886  */
 887 struct ieee80211_ht_cap {
 888         __le16 cap_info;
 889         u8 ampdu_params_info;
 890
 891         /* 16 bytes MCS information */
 892         struct ieee80211_mcs_info mcs;
 893
 894         __le16 extended_ht_cap_info;
 895         __le32 tx_BF_cap_info;
 896         u8 antenna_selection_info;
 897 } __attribute__ ((packed));
 898
 899 /* 802.11n HT capabilities masks (for cap_info) */
 900 #define IEEE80211_HT_CAP_LDPC_CODING            0x0001
 901 #define IEEE80211_HT_CAP_SUP_WIDTH_20_40        0x0002
 902 #define IEEE80211_HT_CAP_SM_PS                  0x000C
 903 #define         IEEE80211_HT_CAP_SM_PS_SHIFT    2
 904 #define IEEE80211_HT_CAP_GRN_FLD                0x0010
 905 #define IEEE80211_HT_CAP_SGI_20                 0x0020
 906 #define IEEE80211_HT_CAP_SGI_40                 0x0040
 907 #define IEEE80211_HT_CAP_TX_STBC                0x0080
 908 #define IEEE80211_HT_CAP_RX_STBC                0x0300
 909 #define         IEEE80211_HT_CAP_RX_STBC_SHIFT  8
 910 #define IEEE80211_HT_CAP_DELAY_BA               0x0400
 911 #define IEEE80211_HT_CAP_MAX_AMSDU              0x0800
 912 #define IEEE80211_HT_CAP_DSSSCCK40              0x1000
 913 #define IEEE80211_HT_CAP_RESERVED               0x2000
 914 #define IEEE80211_HT_CAP_40MHZ_INTOLERANT       0x4000
 915 #define IEEE80211_HT_CAP_LSIG_TXOP_PROT         0x8000
 916
 917 /* 802.11n HT extended capabilities masks (for extended_ht_cap_info) */
 918 #define IEEE80211_HT_EXT_CAP_PCO                0x0001
 919 #define IEEE80211_HT_EXT_CAP_PCO_TIME           0x0006
 920 #define         IEEE80211_HT_EXT_CAP_PCO_TIME_SHIFT     1
 921 #define IEEE80211_HT_EXT_CAP_MCS_FB             0x0300
 922 #define         IEEE80211_HT_EXT_CAP_MCS_FB_SHIFT       8
 923 #define IEEE80211_HT_EXT_CAP_HTC_SUP            0x0400
 924 #define IEEE80211_HT_EXT_CAP_RD_RESPONDER       0x0800
 925
 926 /* 802.11n HT capability AMPDU settings (for ampdu_params_info) */
 927 #define IEEE80211_HT_AMPDU_PARM_FACTOR          0x03
 928 #define IEEE80211_HT_AMPDU_PARM_DENSITY         0x1C
 929 #define         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT   2
 930
 931 /*
 932  * Maximum length of AMPDU that the STA can receive.
 933  * Length = 2 ^ (13 + max_ampdu_length_exp) - 1 (octets)
 934  */
 935 enum ieee80211_max_ampdu_length_exp {
 936         IEEE80211_HT_MAX_AMPDU_8K = 0,
 937         IEEE80211_HT_MAX_AMPDU_16K = 1,
 938         IEEE80211_HT_MAX_AMPDU_32K = 2,
 939         IEEE80211_HT_MAX_AMPDU_64K = 3
 940 };
 941
 942 #define IEEE80211_HT_MAX_AMPDU_FACTOR 13
 943
 944 /* Minimum MPDU start spacing */
 945 enum ieee80211_min_mpdu_spacing {
 946         IEEE80211_HT_MPDU_DENSITY_NONE = 0,     /* No restriction */
 947         IEEE80211_HT_MPDU_DENSITY_0_25 = 1,     /* 1/4 usec */
 948         IEEE80211_HT_MPDU_DENSITY_0_5 = 2,      /* 1/2 usec */
 949         IEEE80211_HT_MPDU_DENSITY_1 = 3,        /* 1 usec */
 950         IEEE80211_HT_MPDU_DENSITY_2 = 4,        /* 2 usec */
 951         IEEE80211_HT_MPDU_DENSITY_4 = 5,        /* 4 usec */
 952         IEEE80211_HT_MPDU_DENSITY_8 = 6,        /* 8 usec */
 953         IEEE80211_HT_MPDU_DENSITY_16 = 7        /* 16 usec */
 954 };
 955
 956 /**
 957  * struct ieee80211_ht_info - HT information
 958  *
 959  * This structure is the "HT information element" as
 960  * described in 802.11n D5.0 7.3.2.58
 961  */
 962 struct ieee80211_ht_info {
 963         u8 control_chan;
 964         u8 ht_param;
 965         __le16 operation_mode;
 966         __le16 stbc_param;
 967         u8 basic_set[16];
 968 } __attribute__ ((packed));
 969
 970 /* for ht_param */
 971 #define IEEE80211_HT_PARAM_CHA_SEC_OFFSET               0x03
 972 #define         IEEE80211_HT_PARAM_CHA_SEC_NONE         0x00
 973 #define         IEEE80211_HT_PARAM_CHA_SEC_ABOVE        0x01
 974 #define         IEEE80211_HT_PARAM_CHA_SEC_BELOW        0x03
 975 #define IEEE80211_HT_PARAM_CHAN_WIDTH_ANY               0x04
 976 #define IEEE80211_HT_PARAM_RIFS_MODE                    0x08
 977 #define IEEE80211_HT_PARAM_SPSMP_SUPPORT                0x10
 978 #define IEEE80211_HT_PARAM_SERV_INTERVAL_GRAN           0xE0
 979
 980 /* for operation_mode */
 981 #define IEEE80211_HT_OP_MODE_PROTECTION                 0x0003
 982 #define         IEEE80211_HT_OP_MODE_PROTECTION_NONE            0
 983 #define         IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER       1
 984 #define         IEEE80211_HT_OP_MODE_PROTECTION_20MHZ           2
 985 #define         IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED     3
 986 #define IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT           0x0004
 987 #define IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT           0x0010
 988
 989 /* for stbc_param */
 990 #define IEEE80211_HT_STBC_PARAM_DUAL_BEACON             0x0040
 991 #define IEEE80211_HT_STBC_PARAM_DUAL_CTS_PROT           0x0080
 992 #define IEEE80211_HT_STBC_PARAM_STBC_BEACON             0x0100
 993 #define IEEE80211_HT_STBC_PARAM_LSIG_TXOP_FULLPROT      0x0200
 994 #define IEEE80211_HT_STBC_PARAM_PCO_ACTIVE              0x0400
 995 #define IEEE80211_HT_STBC_PARAM_PCO_PHASE               0x0800
 996
 997
 998 /* block-ack parameters */
 999 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
1000 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
1001 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFC0
1002 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
1003 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
1004
1005 /*
1006  * A-PMDU buffer sizes
1007  * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2)
1008  */
1009 #define IEEE80211_MIN_AMPDU_BUF 0x8
1010 #define IEEE80211_MAX_AMPDU_BUF 0x40
1011
1012
1013 /* Spatial Multiplexing Power Save Modes (for capability) */
1014 #define WLAN_HT_CAP_SM_PS_STATIC        0
1015 #define WLAN_HT_CAP_SM_PS_DYNAMIC       1
1016 #define WLAN_HT_CAP_SM_PS_INVALID       2
1017 #define WLAN_HT_CAP_SM_PS_DISABLED      3
1018
1019 /* for SM power control field lower two bits */
1020 #define WLAN_HT_SMPS_CONTROL_DISABLED   0
1021 #define WLAN_HT_SMPS_CONTROL_STATIC     1
1022 #define WLAN_HT_SMPS_CONTROL_DYNAMIC    3
1023
1024 /* Authentication algorithms */
1025 #define WLAN_AUTH_OPEN 0
1026 #define WLAN_AUTH_SHARED_KEY 1
1027 #define WLAN_AUTH_FT 2
1028 #define WLAN_AUTH_SAE 3
1029 #define WLAN_AUTH_LEAP 128
1030
1031 #define WLAN_AUTH_CHALLENGE_LEN 128
1032
1033 #define WLAN_CAPABILITY_ESS             (1<<0)
1034 #define WLAN_CAPABILITY_IBSS            (1<<1)
1035
1036 /* A mesh STA sets the ESS and IBSS capability bits to zero */
1037 #define WLAN_CAPABILITY_IS_MBSS(cap)    \
1038         (!((cap) & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)))
1039
1040 #define WLAN_CAPABILITY_CF_POLLABLE     (1<<2)
1041 #define WLAN_CAPABILITY_CF_POLL_REQUEST (1<<3)
1042 #define WLAN_CAPABILITY_PRIVACY         (1<<4)
1043 #define WLAN_CAPABILITY_SHORT_PREAMBLE  (1<<5)
1044 #define WLAN_CAPABILITY_PBCC            (1<<6)
1045 #define WLAN_CAPABILITY_CHANNEL_AGILITY (1<<7)
1046
1047 /* 802.11h */
1048 #define WLAN_CAPABILITY_SPECTRUM_MGMT   (1<<8)
1049 #define WLAN_CAPABILITY_QOS             (1<<9)
1050 #define WLAN_CAPABILITY_SHORT_SLOT_TIME (1<<10)
1051 #define WLAN_CAPABILITY_DSSS_OFDM       (1<<13)
1052 /* measurement */
1053 #define IEEE80211_SPCT_MSR_RPRT_MODE_LATE       (1<<0)
1054 #define IEEE80211_SPCT_MSR_RPRT_MODE_INCAPABLE  (1<<1)
1055 #define IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED    (1<<2)
1056
1057 #define IEEE80211_SPCT_MSR_RPRT_TYPE_BASIC      0
1058 #define IEEE80211_SPCT_MSR_RPRT_TYPE_CCA        1
1059 #define IEEE80211_SPCT_MSR_RPRT_TYPE_RPI        2
1060
1061
1062 /* 802.11g ERP information element */
1063 #define WLAN_ERP_NON_ERP_PRESENT (1<<0)
1064 #define WLAN_ERP_USE_PROTECTION (1<<1)
1065 #define WLAN_ERP_BARKER_PREAMBLE (1<<2)
1066
1067 /* WLAN_ERP_BARKER_PREAMBLE values */
1068 enum {
1069         WLAN_ERP_PREAMBLE_SHORT = 0,
1070         WLAN_ERP_PREAMBLE_LONG = 1,
1071 };
1072
1073 /* Status codes */
1074 enum ieee80211_statuscode {
1075         WLAN_STATUS_SUCCESS = 0,
1076         WLAN_STATUS_UNSPECIFIED_FAILURE = 1,
1077         WLAN_STATUS_CAPS_UNSUPPORTED = 10,
1078         WLAN_STATUS_REASSOC_NO_ASSOC = 11,
1079         WLAN_STATUS_ASSOC_DENIED_UNSPEC = 12,
1080         WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG = 13,
1081         WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION = 14,
1082         WLAN_STATUS_CHALLENGE_FAIL = 15,
1083         WLAN_STATUS_AUTH_TIMEOUT = 16,
1084         WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA = 17,
1085         WLAN_STATUS_ASSOC_DENIED_RATES = 18,
1086         /* 802.11b */
1087         WLAN_STATUS_ASSOC_DENIED_NOSHORTPREAMBLE = 19,
1088         WLAN_STATUS_ASSOC_DENIED_NOPBCC = 20,
1089         WLAN_STATUS_ASSOC_DENIED_NOAGILITY = 21,
1090         /* 802.11h */
1091         WLAN_STATUS_ASSOC_DENIED_NOSPECTRUM = 22,
1092         WLAN_STATUS_ASSOC_REJECTED_BAD_POWER = 23,
1093         WLAN_STATUS_ASSOC_REJECTED_BAD_SUPP_CHAN = 24,
1094         /* 802.11g */
1095         WLAN_STATUS_ASSOC_DENIED_NOSHORTTIME = 25,
1096         WLAN_STATUS_ASSOC_DENIED_NODSSSOFDM = 26,
1097         /* 802.11w */
1098         WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY = 30,
1099         WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION = 31,
1100         /* 802.11i */
1101         WLAN_STATUS_INVALID_IE = 40,
1102         WLAN_STATUS_INVALID_GROUP_CIPHER = 41,
1103         WLAN_STATUS_INVALID_PAIRWISE_CIPHER = 42,
1104         WLAN_STATUS_INVALID_AKMP = 43,
1105         WLAN_STATUS_UNSUPP_RSN_VERSION = 44,
1106         WLAN_STATUS_INVALID_RSN_IE_CAP = 45,
1107         WLAN_STATUS_CIPHER_SUITE_REJECTED = 46,
1108         /* 802.11e */
1109         WLAN_STATUS_UNSPECIFIED_QOS = 32,
1110         WLAN_STATUS_ASSOC_DENIED_NOBANDWIDTH = 33,
1111         WLAN_STATUS_ASSOC_DENIED_LOWACK = 34,
1112         WLAN_STATUS_ASSOC_DENIED_UNSUPP_QOS = 35,
1113         WLAN_STATUS_REQUEST_DECLINED = 37,
1114         WLAN_STATUS_INVALID_QOS_PARAM = 38,
1115         WLAN_STATUS_CHANGE_TSPEC = 39,
1116         WLAN_STATUS_WAIT_TS_DELAY = 47,
1117         WLAN_STATUS_NO_DIRECT_LINK = 48,
1118         WLAN_STATUS_STA_NOT_PRESENT = 49,
1119         WLAN_STATUS_STA_NOT_QSTA = 50,
1120         /* 802.11s */
1121         WLAN_STATUS_ANTI_CLOG_REQUIRED = 76,
1122         WLAN_STATUS_FCG_NOT_SUPP = 78,
1123         WLAN_STATUS_STA_NO_TBTT = 78,
1124 };
1125
1126
1127 /* Reason codes */
1128 enum ieee80211_reasoncode {
1129         WLAN_REASON_UNSPECIFIED = 1,
1130         WLAN_REASON_PREV_AUTH_NOT_VALID = 2,
1131         WLAN_REASON_DEAUTH_LEAVING = 3,
1132         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY = 4,
1133         WLAN_REASON_DISASSOC_AP_BUSY = 5,
1134         WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA = 6,
1135         WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA = 7,
1136         WLAN_REASON_DISASSOC_STA_HAS_LEFT = 8,
1137         WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH = 9,
1138         /* 802.11h */
1139         WLAN_REASON_DISASSOC_BAD_POWER = 10,
1140         WLAN_REASON_DISASSOC_BAD_SUPP_CHAN = 11,
1141         /* 802.11i */
1142         WLAN_REASON_INVALID_IE = 13,
1143         WLAN_REASON_MIC_FAILURE = 14,
1144         WLAN_REASON_4WAY_HANDSHAKE_TIMEOUT = 15,
1145         WLAN_REASON_GROUP_KEY_HANDSHAKE_TIMEOUT = 16,
1146         WLAN_REASON_IE_DIFFERENT = 17,
1147         WLAN_REASON_INVALID_GROUP_CIPHER = 18,
1148         WLAN_REASON_INVALID_PAIRWISE_CIPHER = 19,
1149         WLAN_REASON_INVALID_AKMP = 20,
1150         WLAN_REASON_UNSUPP_RSN_VERSION = 21,
1151         WLAN_REASON_INVALID_RSN_IE_CAP = 22,
1152         WLAN_REASON_IEEE8021X_FAILED = 23,
1153         WLAN_REASON_CIPHER_SUITE_REJECTED = 24,
1154         /* 802.11e */
1155         WLAN_REASON_DISASSOC_UNSPECIFIED_QOS = 32,
1156         WLAN_REASON_DISASSOC_QAP_NO_BANDWIDTH = 33,
1157         WLAN_REASON_DISASSOC_LOW_ACK = 34,
1158         WLAN_REASON_DISASSOC_QAP_EXCEED_TXOP = 35,
1159         WLAN_REASON_QSTA_LEAVE_QBSS = 36,
1160         WLAN_REASON_QSTA_NOT_USE = 37,
1161         WLAN_REASON_QSTA_REQUIRE_SETUP = 38,
1162         WLAN_REASON_QSTA_TIMEOUT = 39,
1163         WLAN_REASON_QSTA_CIPHER_NOT_SUPP = 45,
1164         /* 802.11s */
1165         WLAN_REASON_MESH_PEER_CANCELED = 52,
1166         WLAN_REASON_MESH_MAX_PEERS = 53,
1167         WLAN_REASON_MESH_CONFIG = 54,
1168         WLAN_REASON_MESH_CLOSE = 55,
1169         WLAN_REASON_MESH_MAX_RETRIES = 56,
1170         WLAN_REASON_MESH_CONFIRM_TIMEOUT = 57,
1171         WLAN_REASON_MESH_INVALID_GTK = 58,
1172         WLAN_REASON_MESH_INCONSISTENT_PARAM = 59,
1173         WLAN_REASON_MESH_INVALID_SECURITY = 60,
1174         WLAN_REASON_MESH_PATH_ERROR = 61,
1175         WLAN_REASON_MESH_PATH_NOFORWARD = 62,
1176         WLAN_REASON_MESH_PATH_DEST_UNREACHABLE = 63,
1177         WLAN_REASON_MAC_EXISTS_IN_MBSS = 64,
1178         WLAN_REASON_MESH_CHAN_REGULATORY = 65,
1179         WLAN_REASON_MESH_CHAN = 66,
1180 };
1181
1182
1183 /* Information Element IDs */
1184 enum ieee80211_eid {
1185         WLAN_EID_SSID = 0,
1186         WLAN_EID_SUPP_RATES = 1,
1187         WLAN_EID_FH_PARAMS = 2,
1188         WLAN_EID_DS_PARAMS = 3,
1189         WLAN_EID_CF_PARAMS = 4,
1190         WLAN_EID_TIM = 5,
1191         WLAN_EID_IBSS_PARAMS = 6,
1192         WLAN_EID_CHALLENGE = 16,
1193
1194         WLAN_EID_COUNTRY = 7,
1195         WLAN_EID_HP_PARAMS = 8,
1196         WLAN_EID_HP_TABLE = 9,
1197         WLAN_EID_REQUEST = 10,
1198
1199         WLAN_EID_QBSS_LOAD = 11,
1200         WLAN_EID_EDCA_PARAM_SET = 12,
1201         WLAN_EID_TSPEC = 13,
1202         WLAN_EID_TCLAS = 14,
1203         WLAN_EID_SCHEDULE = 15,
1204         WLAN_EID_TS_DELAY = 43,
1205         WLAN_EID_TCLAS_PROCESSING = 44,
1206         WLAN_EID_QOS_CAPA = 46,
1207         /* 802.11s */
1208         WLAN_EID_MESH_CONFIG = 113,
1209         WLAN_EID_MESH_ID = 114,
1210         WLAN_EID_LINK_METRIC_REPORT = 115,
1211         WLAN_EID_CONGESTION_NOTIFICATION = 116,
1212         /* Note that the Peer Link IE has been replaced with the similar
1213          * Peer Management IE.  We will keep the former definition until mesh
1214          * code is changed to comply with latest 802.11s drafts.
1215          */
1216         WLAN_EID_PEER_LINK = 55,  /* no longer in 802.11s drafts */
1217         WLAN_EID_PEER_MGMT = 117,
1218         WLAN_EID_CHAN_SWITCH_PARAM = 118,
1219         WLAN_EID_MESH_AWAKE_WINDOW = 119,
1220         WLAN_EID_BEACON_TIMING = 120,
1221         WLAN_EID_MCCAOP_SETUP_REQ = 121,
1222         WLAN_EID_MCCAOP_SETUP_RESP = 122,
1223         WLAN_EID_MCCAOP_ADVERT = 123,
1224         WLAN_EID_MCCAOP_TEARDOWN = 124,
1225         WLAN_EID_GANN = 125,
1226         WLAN_EID_RANN = 126,
1227         WLAN_EID_PREQ = 130,
1228         WLAN_EID_PREP = 131,
1229         WLAN_EID_PERR = 132,
1230         WLAN_EID_PXU = 137,
1231         WLAN_EID_PXUC = 138,
1232         WLAN_EID_AUTH_MESH_PEER_EXCH = 139,
1233         WLAN_EID_MIC = 140,
1234
1235         WLAN_EID_PWR_CONSTRAINT = 32,
1236         WLAN_EID_PWR_CAPABILITY = 33,
1237         WLAN_EID_TPC_REQUEST = 34,
1238         WLAN_EID_TPC_REPORT = 35,
1239         WLAN_EID_SUPPORTED_CHANNELS = 36,
1240         WLAN_EID_CHANNEL_SWITCH = 37,
1241         WLAN_EID_MEASURE_REQUEST = 38,
1242         WLAN_EID_MEASURE_REPORT = 39,
1243         WLAN_EID_QUIET = 40,
1244         WLAN_EID_IBSS_DFS = 41,
1245
1246         WLAN_EID_ERP_INFO = 42,
1247         WLAN_EID_EXT_SUPP_RATES = 50,
1248
1249         WLAN_EID_HT_CAPABILITY = 45,
1250         WLAN_EID_HT_INFORMATION = 61,
1251
1252         WLAN_EID_RSN = 48,
1253         WLAN_EID_MMIE = 76,
1254         WLAN_EID_WPA = 221,
1255         WLAN_EID_GENERIC = 221,
1256         WLAN_EID_VENDOR_SPECIFIC = 221,
1257         WLAN_EID_QOS_PARAMETER = 222,
1258
1259         WLAN_EID_AP_CHAN_REPORT = 51,
1260         WLAN_EID_NEIGHBOR_REPORT = 52,
1261         WLAN_EID_RCPI = 53,
1262         WLAN_EID_BSS_AVG_ACCESS_DELAY = 63,
1263         WLAN_EID_ANTENNA_INFO = 64,
1264         WLAN_EID_RSNI = 65,
1265         WLAN_EID_MEASUREMENT_PILOT_TX_INFO = 66,
1266         WLAN_EID_BSS_AVAILABLE_CAPACITY = 67,
1267         WLAN_EID_BSS_AC_ACCESS_DELAY = 68,
1268         WLAN_EID_RRM_ENABLED_CAPABILITIES = 70,
1269         WLAN_EID_MULTIPLE_BSSID = 71,
1270         WLAN_EID_BSS_COEX_2040 = 72,
1271         WLAN_EID_OVERLAP_BSS_SCAN_PARAM = 74,
1272         WLAN_EID_EXT_CAPABILITY = 127,
1273
1274         WLAN_EID_MOBILITY_DOMAIN = 54,
1275         WLAN_EID_FAST_BSS_TRANSITION = 55,
1276         WLAN_EID_TIMEOUT_INTERVAL = 56,
1277         WLAN_EID_RIC_DATA = 57,
1278         WLAN_EID_RIC_DESCRIPTOR = 75,
1279
1280         WLAN_EID_DSE_REGISTERED_LOCATION = 58,
1281         WLAN_EID_SUPPORTED_REGULATORY_CLASSES = 59,
1282         WLAN_EID_EXT_CHANSWITCH_ANN = 60,
1283 };
1284
1285 /* Action category code */
1286 enum ieee80211_category {
1287         WLAN_CATEGORY_SPECTRUM_MGMT = 0,
1288         WLAN_CATEGORY_QOS = 1,
1289         WLAN_CATEGORY_DLS = 2,
1290         WLAN_CATEGORY_BACK = 3,
1291         WLAN_CATEGORY_PUBLIC = 4,
1292         WLAN_CATEGORY_HT = 7,
1293         WLAN_CATEGORY_SA_QUERY = 8,
1294         WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION = 9,
1295         WLAN_CATEGORY_MESH_ACTION = 13,
1296         WLAN_CATEGORY_MULTIHOP_ACTION = 14,
1297         WLAN_CATEGORY_SELF_PROTECTED = 15,
1298         WLAN_CATEGORY_WMM = 17,
1299         /* TODO: remove MESH_PATH_SEL after mesh is updated
1300          * to current 802.11s draft  */
1301         WLAN_CATEGORY_MESH_PATH_SEL = 32,
1302         WLAN_CATEGORY_VENDOR_SPECIFIC_PROTECTED = 126,
1303         WLAN_CATEGORY_VENDOR_SPECIFIC = 127,
1304 };
1305
1306 /* SPECTRUM_MGMT action code */
1307 enum ieee80211_spectrum_mgmt_actioncode {
1308         WLAN_ACTION_SPCT_MSR_REQ = 0,
1309         WLAN_ACTION_SPCT_MSR_RPRT = 1,
1310         WLAN_ACTION_SPCT_TPC_REQ = 2,
1311         WLAN_ACTION_SPCT_TPC_RPRT = 3,
1312         WLAN_ACTION_SPCT_CHL_SWITCH = 4,
1313 };
1314
1315 /* HT action codes */
1316 enum ieee80211_ht_actioncode {
1317         WLAN_HT_ACTION_NOTIFY_CHANWIDTH = 0,
1318         WLAN_HT_ACTION_SMPS = 1,
1319         WLAN_HT_ACTION_PSMP = 2,
1320         WLAN_HT_ACTION_PCO_PHASE = 3,
1321         WLAN_HT_ACTION_CSI = 4,
1322         WLAN_HT_ACTION_NONCOMPRESSED_BF = 5,
1323         WLAN_HT_ACTION_COMPRESSED_BF = 6,
1324         WLAN_HT_ACTION_ASEL_IDX_FEEDBACK = 7,
1325 };
1326
1327 /* Security key length */
1328 enum ieee80211_key_len {
1329         WLAN_KEY_LEN_WEP40 = 5,
1330         WLAN_KEY_LEN_WEP104 = 13,
1331         WLAN_KEY_LEN_CCMP = 16,
1332         WLAN_KEY_LEN_TKIP = 32,
1333         WLAN_KEY_LEN_AES_CMAC = 16,
1334 };
1335
1336 /**
1337  * enum - mesh path selection protocol identifier
1338  *
1339  * @IEEE80211_PATH_PROTOCOL_HWMP: the default path selection protocol
1340  * @IEEE80211_PATH_PROTOCOL_VENDOR: a vendor specific protocol that will
1341  * be specified in a vendor specific information element
1342  */
1343 enum {
1344         IEEE80211_PATH_PROTOCOL_HWMP = 0,
1345         IEEE80211_PATH_PROTOCOL_VENDOR = 255,
1346 };
1347
1348 /**
1349  * enum - mesh path selection metric identifier
1350  *
1351  * @IEEE80211_PATH_METRIC_AIRTIME: the default path selection metric
1352  * @IEEE80211_PATH_METRIC_VENDOR: a vendor specific metric that will be
1353  * specified in a vendor specific information element
1354  */
1355 enum {
1356         IEEE80211_PATH_METRIC_AIRTIME = 0,
1357         IEEE80211_PATH_METRIC_VENDOR = 255,
1358 };
1359
1360
1361 /*
1362  * IEEE 802.11-2007 7.3.2.9 Country information element
1363  *
1364  * Minimum length is 8 octets, ie len must be evenly
1365  * divisible by 2
1366  */
1367
1368 /* Although the spec says 8 I'm seeing 6 in practice */
1369 #define IEEE80211_COUNTRY_IE_MIN_LEN    6
1370
1371 /* The Country String field of the element shall be 3 octets in length */
1372 #define IEEE80211_COUNTRY_STRING_LEN    3
1373
1374 /*
1375  * For regulatory extension stuff see IEEE 802.11-2007
1376  * Annex I (page 1141) and Annex J (page 1147). Also
1377  * review 7.3.2.9.
1378  *
1379  * When dot11RegulatoryClassesRequired is true and the
1380  * first_channel/reg_extension_id is >= 201 then the IE
1381  * compromises of the 'ext' struct represented below:
1382  *
1383  *  - Regulatory extension ID - when generating IE this just needs
1384  *    to be monotonically increasing for each triplet passed in
1385  *    the IE
1386  *  - Regulatory class - index into set of rules
1387  *  - Coverage class - index into air propagation time (Table 7-27),
1388  *    in microseconds, you can compute the air propagation time from
1389  *    the index by multiplying by 3, so index 10 yields a propagation
1390  *    of 10 us. Valid values are 0-31, values 32-255 are not defined
1391  *    yet. A value of 0 inicates air propagation of <= 1 us.
1392  *
1393  *  See also Table I.2 for Emission limit sets and table
1394  *  I.3 for Behavior limit sets. Table J.1 indicates how to map
1395  *  a reg_class to an emission limit set and behavior limit set.
1396  */
1397 #define IEEE80211_COUNTRY_EXTENSION_ID 201
1398
1399 /*
1400  *  Channels numbers in the IE must be monotonically increasing
1401  *  if dot11RegulatoryClassesRequired is not true.
1402  *
1403  *  If dot11RegulatoryClassesRequired is true consecutive
1404  *  subband triplets following a regulatory triplet shall
1405  *  have monotonically increasing first_channel number fields.
1406  *
1407  *  Channel numbers shall not overlap.
1408  *
1409  *  Note that max_power is signed.
1410  */
1411 struct ieee80211_country_ie_triplet {
1412         union {
1413                 struct {
1414                         u8 first_channel;
1415                         u8 num_channels;
1416                         s8 max_power;
1417                 } __attribute__ ((packed)) chans;
1418                 struct {
1419                         u8 reg_extension_id;
1420                         u8 reg_class;
1421                         u8 coverage_class;
1422                 } __attribute__ ((packed)) ext;
1423         };
1424 } __attribute__ ((packed));
1425
1426 enum ieee80211_timeout_interval_type {
1427         WLAN_TIMEOUT_REASSOC_DEADLINE = 1 /* 802.11r */,
1428         WLAN_TIMEOUT_KEY_LIFETIME = 2 /* 802.11r */,
1429         WLAN_TIMEOUT_ASSOC_COMEBACK = 3 /* 802.11w */,
1430 };
1431
1432 /* BACK action code */
1433 enum ieee80211_back_actioncode {
1434         WLAN_ACTION_ADDBA_REQ = 0,
1435         WLAN_ACTION_ADDBA_RESP = 1,
1436         WLAN_ACTION_DELBA = 2,
1437 };
1438
1439 /* BACK (block-ack) parties */
1440 enum ieee80211_back_parties {
1441         WLAN_BACK_RECIPIENT = 0,
1442         WLAN_BACK_INITIATOR = 1,
1443 };
1444
1445 /* SA Query action */
1446 enum ieee80211_sa_query_action {
1447         WLAN_ACTION_SA_QUERY_REQUEST = 0,
1448         WLAN_ACTION_SA_QUERY_RESPONSE = 1,
1449 };
1450
1451
1452 /* A-MSDU 802.11n */
1453 #define IEEE80211_QOS_CONTROL_A_MSDU_PRESENT 0x0080
1454
1455 /* cipher suite selectors */
1456 #define WLAN_CIPHER_SUITE_USE_GROUP     0x000FAC00
1457 #define WLAN_CIPHER_SUITE_WEP40         0x000FAC01
1458 #define WLAN_CIPHER_SUITE_TKIP          0x000FAC02
1459 /* reserved:                            0x000FAC03 */
1460 #define WLAN_CIPHER_SUITE_CCMP          0x000FAC04
1461 #define WLAN_CIPHER_SUITE_WEP104        0x000FAC05
1462 #define WLAN_CIPHER_SUITE_AES_CMAC      0x000FAC06
1463
1464 /* AKM suite selectors */
1465 #define WLAN_AKM_SUITE_8021X            0x000FAC01
1466 #define WLAN_AKM_SUITE_PSK              0x000FAC02
1467 #define WLAN_AKM_SUITE_SAE                      0x000FAC08
1468 #define WLAN_AKM_SUITE_FT_OVER_SAE      0x000FAC09
1469
1470 #define WLAN_MAX_KEY_LEN                32
1471
1472 #define WLAN_PMKID_LEN                  16
1473
1474 /**
1475  * ieee80211_get_qos_ctl - get pointer to qos control bytes
1476  * @hdr: the frame
1477  *
1478  * The qos ctrl bytes come after the frame_control, duration, seq_num
1479  * and 3 or 4 addresses of length ETH_ALEN.
1480  * 3 addr: 2 + 2 + 2 + 3*6 = 24
1481  * 4 addr: 2 + 2 + 2 + 4*6 = 30
1482  */
1483 static inline u8 *ieee80211_get_qos_ctl(struct ieee80211_hdr *hdr)
1484 {
1485         if (ieee80211_has_a4(hdr->frame_control))
1486                 return (u8 *)hdr + 30;
1487         else
1488                 return (u8 *)hdr + 24;
1489 }
1490
1491 /**
1492  * ieee80211_get_SA - get pointer to SA
1493  * @hdr: the frame
1494  *
1495  * Given an 802.11 frame, this function returns the offset
1496  * to the source address (SA). It does not verify that the
1497  * header is long enough to contain the address, and the
1498  * header must be long enough to contain the frame control
1499  * field.
1500  */
1501 static inline u8 *ieee80211_get_SA(struct ieee80211_hdr *hdr)
1502 {
1503         if (ieee80211_has_a4(hdr->frame_control))
1504                 return hdr->addr4;
1505         if (ieee80211_has_fromds(hdr->frame_control))
1506                 return hdr->addr3;
1507         return hdr->addr2;
1508 }
1509
1510 /**
1511  * ieee80211_get_DA - get pointer to DA
1512  * @hdr: the frame
1513  *
1514  * Given an 802.11 frame, this function returns the offset
1515  * to the destination address (DA). It does not verify that
1516  * the header is long enough to contain the address, and the
1517  * header must be long enough to contain the frame control
1518  * field.
1519  */
1520 static inline u8 *ieee80211_get_DA(struct ieee80211_hdr *hdr)
1521 {
1522         if (ieee80211_has_tods(hdr->frame_control))
1523                 return hdr->addr3;
1524         else
1525                 return hdr->addr1;
1526 }
1527
1528 /**
1529  * ieee80211_is_robust_mgmt_frame - check if frame is a robust management frame
1530  * @hdr: the frame (buffer must include at least the first octet of payload)
1531  */
1532 static inline bool ieee80211_is_robust_mgmt_frame(struct ieee80211_hdr *hdr)
1533 {
1534         if (ieee80211_is_disassoc(hdr->frame_control) ||
1535             ieee80211_is_deauth(hdr->frame_control))
1536                 return true;
1537
1538         if (ieee80211_is_action(hdr->frame_control)) {
1539                 u8 *category;
1540
1541                 /*
1542                  * Action frames, excluding Public Action frames, are Robust
1543                  * Management Frames. However, if we are looking at a Protected
1544                  * frame, skip the check since the data may be encrypted and
1545                  * the frame has already been found to be a Robust Management
1546                  * Frame (by the other end).
1547                  */
1548                 if (ieee80211_has_protected(hdr->frame_control))
1549                         return true;
1550                 category = ((u8 *) hdr) + 24;
1551                 return *category != WLAN_CATEGORY_PUBLIC &&
1552                         *category != WLAN_CATEGORY_HT &&
1553                         *category != WLAN_CATEGORY_VENDOR_SPECIFIC;
1554         }
1555
1556         return false;
1557 }
1558
1559 /**
1560  * ieee80211_fhss_chan_to_freq - get channel frequency
1561  * @channel: the FHSS channel
1562  *
1563  * Convert IEEE802.11 FHSS channel to frequency (MHz)
1564  * Ref IEEE 802.11-2007 section 14.6
1565  */
1566 static inline int ieee80211_fhss_chan_to_freq(int channel)
1567 {
1568         if ((channel > 1) && (channel < 96))
1569                 return channel + 2400;
1570         else
1571                 return -1;
1572 }
1573
1574 /**
1575  * ieee80211_freq_to_fhss_chan - get channel
1576  * @freq: the channels frequency
1577  *
1578  * Convert frequency (MHz) to IEEE802.11 FHSS channel
1579  * Ref IEEE 802.11-2007 section 14.6
1580  */
1581 static inline int ieee80211_freq_to_fhss_chan(int freq)
1582 {
1583         if ((freq > 2401) && (freq < 2496))
1584                 return freq - 2400;
1585         else
1586                 return -1;
1587 }
1588
1589 /**
1590  * ieee80211_dsss_chan_to_freq - get channel center frequency
1591  * @channel: the DSSS channel
1592  *
1593  * Convert IEEE802.11 DSSS channel to the center frequency (MHz).
1594  * Ref IEEE 802.11-2007 section 15.6
1595  */
1596 static inline int ieee80211_dsss_chan_to_freq(int channel)
1597 {
1598         if ((channel > 0) && (channel < 14))
1599                 return 2407 + (channel * 5);
1600         else if (channel == 14)
1601                 return 2484;
1602         else
1603                 return -1;
1604 }
1605
1606 /**
1607  * ieee80211_freq_to_dsss_chan - get channel
1608  * @freq: the frequency
1609  *
1610  * Convert frequency (MHz) to IEEE802.11 DSSS channel
1611  * Ref IEEE 802.11-2007 section 15.6
1612  *
1613  * This routine selects the channel with the closest center frequency.
1614  */
1615 static inline int ieee80211_freq_to_dsss_chan(int freq)
1616 {
1617         if ((freq >= 2410) && (freq < 2475))
1618                 return (freq - 2405) / 5;
1619         else if ((freq >= 2482) && (freq < 2487))
1620                 return 14;
1621         else
1622                 return -1;
1623 }
1624
1625 /* Convert IEEE802.11 HR DSSS channel to frequency (MHz) and back
1626  * Ref IEEE 802.11-2007 section 18.4.6.2
1627  *
1628  * The channels and frequencies are the same as those defined for DSSS
1629  */
1630 #define ieee80211_hr_chan_to_freq(chan) ieee80211_dsss_chan_to_freq(chan)
1631 #define ieee80211_freq_to_hr_chan(freq) ieee80211_freq_to_dsss_chan(freq)
1632
1633 /* Convert IEEE802.11 ERP channel to frequency (MHz) and back
1634  * Ref IEEE 802.11-2007 section 19.4.2
1635  */
1636 #define ieee80211_erp_chan_to_freq(chan) ieee80211_hr_chan_to_freq(chan)
1637 #define ieee80211_freq_to_erp_chan(freq) ieee80211_freq_to_hr_chan(freq)
1638
1639 /**
1640  * ieee80211_ofdm_chan_to_freq - get channel center frequency
1641  * @s_freq: starting frequency == (dotChannelStartingFactor/2) MHz
1642  * @channel: the OFDM channel
1643  *
1644  * Convert IEEE802.11 OFDM channel to center frequency (MHz)
1645  * Ref IEEE 802.11-2007 section 17.3.8.3.2
1646  */
1647 static inline int ieee80211_ofdm_chan_to_freq(int s_freq, int channel)
1648 {
1649         if ((channel > 0) && (channel <= 200) &&
1650             (s_freq >= 4000))
1651                 return s_freq + (channel * 5);
1652         else
1653                 return -1;
1654 }
1655
1656 /**
1657  * ieee80211_freq_to_ofdm_channel - get channel
1658  * @s_freq: starting frequency == (dotChannelStartingFactor/2) MHz
1659  * @freq: the frequency
1660  *
1661  * Convert frequency (MHz) to IEEE802.11 OFDM channel
1662  * Ref IEEE 802.11-2007 section 17.3.8.3.2
1663  *
1664  * This routine selects the channel with the closest center frequency.
1665  */
1666 static inline int ieee80211_freq_to_ofdm_chan(int s_freq, int freq)
1667 {
1668         if ((freq > (s_freq + 2)) && (freq <= (s_freq + 1202)) &&
1669             (s_freq >= 4000))
1670                 return (freq + 2 - s_freq) / 5;
1671         else
1672                 return -1;
1673 }
1674
1675 /**
1676  * ieee80211_tu_to_usec - convert time units (TU) to microseconds
1677  * @tu: the TUs
1678  */
1679 static inline unsigned long ieee80211_tu_to_usec(unsigned long tu)
1680 {
1681         return 1024 * tu;
1682 }
1683
1684 /**
1685  * ieee80211_check_tim - check if AID bit is set in TIM
1686  * @tim: the TIM IE
1687  * @tim_len: length of the TIM IE
1688  * @aid: the AID to look for
1689  */
1690 static inline bool ieee80211_check_tim(struct ieee80211_tim_ie *tim,
1691                                        u8 tim_len, u16 aid)
1692 {
1693         u8 mask;
1694         u8 indexn0, indexn1, indexn2;
1695
1696         if (unlikely(!tim || tim_len < sizeof(*tim)))
1697                 return false;
1698
1699         aid &= 0x3fff;
1700         indexn0 = aid / 8;
1701         mask  = 1 << (aid & 7);
1702
1703         indexn1 = tim->bitmap_ctrl & 0xfe;
1704         indexn2 = tim_len + indexn1 - 4;
1705
1706         if (indexn0 < indexn1 || indexn0 > indexn2)
1707                 return false;
1708
1709         indexn0 -= indexn1;
1710
1711         return !!(tim->virtual_map[indexn0] & mask);
1712 }
1713
1714 #endif /* __LINUX_IEEE80211_H */