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 #define IEEE80211_MESH_CONFIG_LEN       19
 119
 120 #define IEEE80211_QOS_CTL_LEN           2
 121 #define IEEE80211_QOS_CTL_TID_MASK      0x000F
 122 #define IEEE80211_QOS_CTL_TAG1D_MASK    0x0007
 123
 124 struct ieee80211_hdr {
 125         __le16 frame_control;
 126         __le16 duration_id;
 127         u8 addr1[6];
 128         u8 addr2[6];
 129         u8 addr3[6];
 130         __le16 seq_ctrl;
 131         u8 addr4[6];
 132 } __attribute__ ((packed));
 133
 134 /**
 135  * ieee80211_has_tods - check if IEEE80211_FCTL_TODS is set
 136  * @fc: frame control bytes in little-endian byteorder
 137  */
 138 static inline int ieee80211_has_tods(__le16 fc)
 139 {
 140         return (fc & cpu_to_le16(IEEE80211_FCTL_TODS)) != 0;
 141 }
 142
 143 /**
 144  * ieee80211_has_fromds - check if IEEE80211_FCTL_FROMDS is set
 145  * @fc: frame control bytes in little-endian byteorder
 146  */
 147 static inline int ieee80211_has_fromds(__le16 fc)
 148 {
 149         return (fc & cpu_to_le16(IEEE80211_FCTL_FROMDS)) != 0;
 150 }
 151
 152 /**
 153  * ieee80211_has_a4 - check if IEEE80211_FCTL_TODS and IEEE80211_FCTL_FROMDS are set
 154  * @fc: frame control bytes in little-endian byteorder
 155  */
 156 static inline int ieee80211_has_a4(__le16 fc)
 157 {
 158         __le16 tmp = cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS);
 159         return (fc & tmp) == tmp;
 160 }
 161
 162 /**
 163  * ieee80211_has_morefrags - check if IEEE80211_FCTL_MOREFRAGS is set
 164  * @fc: frame control bytes in little-endian byteorder
 165  */
 166 static inline int ieee80211_has_morefrags(__le16 fc)
 167 {
 168         return (fc & cpu_to_le16(IEEE80211_FCTL_MOREFRAGS)) != 0;
 169 }
 170
 171 /**
 172  * ieee80211_has_retry - check if IEEE80211_FCTL_RETRY is set
 173  * @fc: frame control bytes in little-endian byteorder
 174  */
 175 static inline int ieee80211_has_retry(__le16 fc)
 176 {
 177         return (fc & cpu_to_le16(IEEE80211_FCTL_RETRY)) != 0;
 178 }
 179
 180 /**
 181  * ieee80211_has_pm - check if IEEE80211_FCTL_PM is set
 182  * @fc: frame control bytes in little-endian byteorder
 183  */
 184 static inline int ieee80211_has_pm(__le16 fc)
 185 {
 186         return (fc & cpu_to_le16(IEEE80211_FCTL_PM)) != 0;
 187 }
 188
 189 /**
 190  * ieee80211_has_moredata - check if IEEE80211_FCTL_MOREDATA is set
 191  * @fc: frame control bytes in little-endian byteorder
 192  */
 193 static inline int ieee80211_has_moredata(__le16 fc)
 194 {
 195         return (fc & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) != 0;
 196 }
 197
 198 /**
 199  * ieee80211_has_protected - check if IEEE80211_FCTL_PROTECTED is set
 200  * @fc: frame control bytes in little-endian byteorder
 201  */
 202 static inline int ieee80211_has_protected(__le16 fc)
 203 {
 204         return (fc & cpu_to_le16(IEEE80211_FCTL_PROTECTED)) != 0;
 205 }
 206
 207 /**
 208  * ieee80211_has_order - check if IEEE80211_FCTL_ORDER is set
 209  * @fc: frame control bytes in little-endian byteorder
 210  */
 211 static inline int ieee80211_has_order(__le16 fc)
 212 {
 213         return (fc & cpu_to_le16(IEEE80211_FCTL_ORDER)) != 0;
 214 }
 215
 216 /**
 217  * ieee80211_is_mgmt - check if type is IEEE80211_FTYPE_MGMT
 218  * @fc: frame control bytes in little-endian byteorder
 219  */
 220 static inline int ieee80211_is_mgmt(__le16 fc)
 221 {
 222         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
 223                cpu_to_le16(IEEE80211_FTYPE_MGMT);
 224 }
 225
 226 /**
 227  * ieee80211_is_ctl - check if type is IEEE80211_FTYPE_CTL
 228  * @fc: frame control bytes in little-endian byteorder
 229  */
 230 static inline int ieee80211_is_ctl(__le16 fc)
 231 {
 232         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
 233                cpu_to_le16(IEEE80211_FTYPE_CTL);
 234 }
 235
 236 /**
 237  * ieee80211_is_data - check if type is IEEE80211_FTYPE_DATA
 238  * @fc: frame control bytes in little-endian byteorder
 239  */
 240 static inline int ieee80211_is_data(__le16 fc)
 241 {
 242         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
 243                cpu_to_le16(IEEE80211_FTYPE_DATA);
 244 }
 245
 246 /**
 247  * ieee80211_is_data_qos - check if type is IEEE80211_FTYPE_DATA and IEEE80211_STYPE_QOS_DATA is set
 248  * @fc: frame control bytes in little-endian byteorder
 249  */
 250 static inline int ieee80211_is_data_qos(__le16 fc)
 251 {
 252         /*
 253          * mask with QOS_DATA rather than IEEE80211_FCTL_STYPE as we just need
 254          * to check the one bit
 255          */
 256         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_STYPE_QOS_DATA)) ==
 257                cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_DATA);
 258 }
 259
 260 /**
 261  * ieee80211_is_data_present - check if type is IEEE80211_FTYPE_DATA and has data
 262  * @fc: frame control bytes in little-endian byteorder
 263  */
 264 static inline int ieee80211_is_data_present(__le16 fc)
 265 {
 266         /*
 267          * mask with 0x40 and test that that bit is clear to only return true
 268          * for the data-containing substypes.
 269          */
 270         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | 0x40)) ==
 271                cpu_to_le16(IEEE80211_FTYPE_DATA);
 272 }
 273
 274 /**
 275  * ieee80211_is_assoc_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ASSOC_REQ
 276  * @fc: frame control bytes in little-endian byteorder
 277  */
 278 static inline int ieee80211_is_assoc_req(__le16 fc)
 279 {
 280         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 281                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ASSOC_REQ);
 282 }
 283
 284 /**
 285  * ieee80211_is_assoc_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ASSOC_RESP
 286  * @fc: frame control bytes in little-endian byteorder
 287  */
 288 static inline int ieee80211_is_assoc_resp(__le16 fc)
 289 {
 290         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 291                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ASSOC_RESP);
 292 }
 293
 294 /**
 295  * ieee80211_is_reassoc_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_REASSOC_REQ
 296  * @fc: frame control bytes in little-endian byteorder
 297  */
 298 static inline int ieee80211_is_reassoc_req(__le16 fc)
 299 {
 300         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 301                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_REASSOC_REQ);
 302 }
 303
 304 /**
 305  * ieee80211_is_reassoc_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_REASSOC_RESP
 306  * @fc: frame control bytes in little-endian byteorder
 307  */
 308 static inline int ieee80211_is_reassoc_resp(__le16 fc)
 309 {
 310         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 311                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_REASSOC_RESP);
 312 }
 313
 314 /**
 315  * ieee80211_is_probe_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_PROBE_REQ
 316  * @fc: frame control bytes in little-endian byteorder
 317  */
 318 static inline int ieee80211_is_probe_req(__le16 fc)
 319 {
 320         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 321                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_REQ);
 322 }
 323
 324 /**
 325  * ieee80211_is_probe_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_PROBE_RESP
 326  * @fc: frame control bytes in little-endian byteorder
 327  */
 328 static inline int ieee80211_is_probe_resp(__le16 fc)
 329 {
 330         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 331                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_RESP);
 332 }
 333
 334 /**
 335  * ieee80211_is_beacon - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_BEACON
 336  * @fc: frame control bytes in little-endian byteorder
 337  */
 338 static inline int ieee80211_is_beacon(__le16 fc)
 339 {
 340         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 341                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON);
 342 }
 343
 344 /**
 345  * ieee80211_is_atim - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ATIM
 346  * @fc: frame control bytes in little-endian byteorder
 347  */
 348 static inline int ieee80211_is_atim(__le16 fc)
 349 {
 350         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 351                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ATIM);
 352 }
 353
 354 /**
 355  * ieee80211_is_disassoc - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_DISASSOC
 356  * @fc: frame control bytes in little-endian byteorder
 357  */
 358 static inline int ieee80211_is_disassoc(__le16 fc)
 359 {
 360         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 361                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DISASSOC);
 362 }
 363
 364 /**
 365  * ieee80211_is_auth - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_AUTH
 366  * @fc: frame control bytes in little-endian byteorder
 367  */
 368 static inline int ieee80211_is_auth(__le16 fc)
 369 {
 370         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 371                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH);
 372 }
 373
 374 /**
 375  * ieee80211_is_deauth - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_DEAUTH
 376  * @fc: frame control bytes in little-endian byteorder
 377  */
 378 static inline int ieee80211_is_deauth(__le16 fc)
 379 {
 380         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 381                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DEAUTH);
 382 }
 383
 384 /**
 385  * ieee80211_is_action - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ACTION
 386  * @fc: frame control bytes in little-endian byteorder
 387  */
 388 static inline int ieee80211_is_action(__le16 fc)
 389 {
 390         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 391                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION);
 392 }
 393
 394 /**
 395  * ieee80211_is_back_req - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_BACK_REQ
 396  * @fc: frame control bytes in little-endian byteorder
 397  */
 398 static inline int ieee80211_is_back_req(__le16 fc)
 399 {
 400         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 401                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK_REQ);
 402 }
 403
 404 /**
 405  * ieee80211_is_back - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_BACK
 406  * @fc: frame control bytes in little-endian byteorder
 407  */
 408 static inline int ieee80211_is_back(__le16 fc)
 409 {
 410         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 411                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK);
 412 }
 413
 414 /**
 415  * ieee80211_is_pspoll - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_PSPOLL
 416  * @fc: frame control bytes in little-endian byteorder
 417  */
 418 static inline int ieee80211_is_pspoll(__le16 fc)
 419 {
 420         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 421                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
 422 }
 423
 424 /**
 425  * ieee80211_is_rts - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_RTS
 426  * @fc: frame control bytes in little-endian byteorder
 427  */
 428 static inline int ieee80211_is_rts(__le16 fc)
 429 {
 430         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 431                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
 432 }
 433
 434 /**
 435  * ieee80211_is_cts - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CTS
 436  * @fc: frame control bytes in little-endian byteorder
 437  */
 438 static inline int ieee80211_is_cts(__le16 fc)
 439 {
 440         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 441                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
 442 }
 443
 444 /**
 445  * ieee80211_is_ack - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_ACK
 446  * @fc: frame control bytes in little-endian byteorder
 447  */
 448 static inline int ieee80211_is_ack(__le16 fc)
 449 {
 450         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 451                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK);
 452 }
 453
 454 /**
 455  * ieee80211_is_cfend - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CFEND
 456  * @fc: frame control bytes in little-endian byteorder
 457  */
 458 static inline int ieee80211_is_cfend(__le16 fc)
 459 {
 460         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 461                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CFEND);
 462 }
 463
 464 /**
 465  * ieee80211_is_cfendack - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CFENDACK
 466  * @fc: frame control bytes in little-endian byteorder
 467  */
 468 static inline int ieee80211_is_cfendack(__le16 fc)
 469 {
 470         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 471                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CFENDACK);
 472 }
 473
 474 /**
 475  * ieee80211_is_nullfunc - check if FTYPE=IEEE80211_FTYPE_DATA and STYPE=IEEE80211_STYPE_NULLFUNC
 476  * @fc: frame control bytes in little-endian byteorder
 477  */
 478 static inline int ieee80211_is_nullfunc(__le16 fc)
 479 {
 480         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 481                cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC);
 482 }
 483
 484 struct ieee80211s_hdr {
 485         u8 flags;
 486         u8 ttl;
 487         __le32 seqnum;
 488         u8 eaddr1[6];
 489         u8 eaddr2[6];
 490         u8 eaddr3[6];
 491 } __attribute__ ((packed));
 492
 493 /* Mesh flags */
 494 #define MESH_FLAGS_AE_A4        0x1
 495 #define MESH_FLAGS_AE_A5_A6     0x2
 496 #define MESH_FLAGS_AE           0x3
 497 #define MESH_FLAGS_PS_DEEP      0x4
 498
 499 /**
 500  * struct ieee80211_quiet_ie
 501  *
 502  * This structure refers to "Quiet information element"
 503  */
 504 struct ieee80211_quiet_ie {
 505         u8 count;
 506         u8 period;
 507         __le16 duration;
 508         __le16 offset;
 509 } __attribute__ ((packed));
 510
 511 /**
 512  * struct ieee80211_msrment_ie
 513  *
 514  * This structure refers to "Measurement Request/Report information element"
 515  */
 516 struct ieee80211_msrment_ie {
 517         u8 token;
 518         u8 mode;
 519         u8 type;
 520         u8 request[0];
 521 } __attribute__ ((packed));
 522
 523 /**
 524  * struct ieee80211_channel_sw_ie
 525  *
 526  * This structure refers to "Channel Switch Announcement information element"
 527  */
 528 struct ieee80211_channel_sw_ie {
 529         u8 mode;
 530         u8 new_ch_num;
 531         u8 count;
 532 } __attribute__ ((packed));
 533
 534 /**
 535  * struct ieee80211_tim
 536  *
 537  * This structure refers to "Traffic Indication Map information element"
 538  */
 539 struct ieee80211_tim_ie {
 540         u8 dtim_count;
 541         u8 dtim_period;
 542         u8 bitmap_ctrl;
 543         /* variable size: 1 - 251 bytes */
 544         u8 virtual_map[1];
 545 } __attribute__ ((packed));
 546
 547 #define WLAN_SA_QUERY_TR_ID_LEN 2
 548
 549 struct ieee80211_mgmt {
 550         __le16 frame_control;
 551         __le16 duration;
 552         u8 da[6];
 553         u8 sa[6];
 554         u8 bssid[6];
 555         __le16 seq_ctrl;
 556         union {
 557                 struct {
 558                         __le16 auth_alg;
 559                         __le16 auth_transaction;
 560                         __le16 status_code;
 561                         /* possibly followed by Challenge text */
 562                         u8 variable[0];
 563                 } __attribute__ ((packed)) auth;
 564                 struct {
 565                         __le16 reason_code;
 566                 } __attribute__ ((packed)) deauth;
 567                 struct {
 568                         __le16 capab_info;
 569                         __le16 listen_interval;
 570                         /* followed by SSID and Supported rates */
 571                         u8 variable[0];
 572                 } __attribute__ ((packed)) assoc_req;
 573                 struct {
 574                         __le16 capab_info;
 575                         __le16 status_code;
 576                         __le16 aid;
 577                         /* followed by Supported rates */
 578                         u8 variable[0];
 579                 } __attribute__ ((packed)) assoc_resp, reassoc_resp;
 580                 struct {
 581                         __le16 capab_info;
 582                         __le16 listen_interval;
 583                         u8 current_ap[6];
 584                         /* followed by SSID and Supported rates */
 585                         u8 variable[0];
 586                 } __attribute__ ((packed)) reassoc_req;
 587                 struct {
 588                         __le16 reason_code;
 589                 } __attribute__ ((packed)) disassoc;
 590                 struct {
 591                         __le64 timestamp;
 592                         __le16 beacon_int;
 593                         __le16 capab_info;
 594                         /* followed by some of SSID, Supported rates,
 595                          * FH Params, DS Params, CF Params, IBSS Params, TIM */
 596                         u8 variable[0];
 597                 } __attribute__ ((packed)) beacon;
 598                 struct {
 599                         /* only variable items: SSID, Supported rates */
 600                         u8 variable[0];
 601                 } __attribute__ ((packed)) probe_req;
 602                 struct {
 603                         __le64 timestamp;
 604                         __le16 beacon_int;
 605                         __le16 capab_info;
 606                         /* followed by some of SSID, Supported rates,
 607                          * FH Params, DS Params, CF Params, IBSS Params */
 608                         u8 variable[0];
 609                 } __attribute__ ((packed)) probe_resp;
 610                 struct {
 611                         u8 category;
 612                         union {
 613                                 struct {
 614                                         u8 action_code;
 615                                         u8 dialog_token;
 616                                         u8 status_code;
 617                                         u8 variable[0];
 618                                 } __attribute__ ((packed)) wme_action;
 619                                 struct{
 620                                         u8 action_code;
 621                                         u8 element_id;
 622                                         u8 length;
 623                                         struct ieee80211_channel_sw_ie sw_elem;
 624                                 } __attribute__((packed)) chan_switch;
 625                                 struct{
 626                                         u8 action_code;
 627                                         u8 dialog_token;
 628                                         u8 element_id;
 629                                         u8 length;
 630                                         struct ieee80211_msrment_ie msr_elem;
 631                                 } __attribute__((packed)) measurement;
 632                                 struct{
 633                                         u8 action_code;
 634                                         u8 dialog_token;
 635                                         __le16 capab;
 636                                         __le16 timeout;
 637                                         __le16 start_seq_num;
 638                                 } __attribute__((packed)) addba_req;
 639                                 struct{
 640                                         u8 action_code;
 641                                         u8 dialog_token;
 642                                         __le16 status;
 643                                         __le16 capab;
 644                                         __le16 timeout;
 645                                 } __attribute__((packed)) addba_resp;
 646                                 struct{
 647                                         u8 action_code;
 648                                         __le16 params;
 649                                         __le16 reason_code;
 650                                 } __attribute__((packed)) delba;
 651                                 struct{
 652                                         u8 action_code;
 653                                         /* capab_info for open and confirm,
 654                                          * reason for close
 655                                          */
 656                                         __le16 aux;
 657                                         /* Followed in plink_confirm by status
 658                                          * code, AID and supported rates,
 659                                          * and directly by supported rates in
 660                                          * plink_open and plink_close
 661                                          */
 662                                         u8 variable[0];
 663                                 } __attribute__((packed)) plink_action;
 664                                 struct{
 665                                         u8 action_code;
 666                                         u8 variable[0];
 667                                 } __attribute__((packed)) mesh_action;
 668                                 struct {
 669                                         u8 action;
 670                                         u8 trans_id[WLAN_SA_QUERY_TR_ID_LEN];
 671                                 } __attribute__ ((packed)) sa_query;
 672                         } u;
 673                 } __attribute__ ((packed)) action;
 674         } u;
 675 } __attribute__ ((packed));
 676
 677 /* mgmt header + 1 byte category code */
 678 #define IEEE80211_MIN_ACTION_SIZE offsetof(struct ieee80211_mgmt, u.action.u)
 679
 680
 681 /* Management MIC information element (IEEE 802.11w) */
 682 struct ieee80211_mmie {
 683         u8 element_id;
 684         u8 length;
 685         __le16 key_id;
 686         u8 sequence_number[6];
 687         u8 mic[8];
 688 } __attribute__ ((packed));
 689
 690 /* Control frames */
 691 struct ieee80211_rts {
 692         __le16 frame_control;
 693         __le16 duration;
 694         u8 ra[6];
 695         u8 ta[6];
 696 } __attribute__ ((packed));
 697
 698 struct ieee80211_cts {
 699         __le16 frame_control;
 700         __le16 duration;
 701         u8 ra[6];
 702 } __attribute__ ((packed));
 703
 704 struct ieee80211_pspoll {
 705         __le16 frame_control;
 706         __le16 aid;
 707         u8 bssid[6];
 708         u8 ta[6];
 709 } __attribute__ ((packed));
 710
 711 /**
 712  * struct ieee80211_bar - HT Block Ack Request
 713  *
 714  * This structure refers to "HT BlockAckReq" as
 715  * described in 802.11n draft section 7.2.1.7.1
 716  */
 717 struct ieee80211_bar {
 718         __le16 frame_control;
 719         __le16 duration;
 720         __u8 ra[6];
 721         __u8 ta[6];
 722         __le16 control;
 723         __le16 start_seq_num;
 724 } __attribute__((packed));
 725
 726 /* 802.11 BAR control masks */
 727 #define IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL     0x0000
 728 #define IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA  0x0004
 729
 730
 731 #define IEEE80211_HT_MCS_MASK_LEN               10
 732
 733 /**
 734  * struct ieee80211_mcs_info - MCS information
 735  * @rx_mask: RX mask
 736  * @rx_highest: highest supported RX rate
 737  * @tx_params: TX parameters
 738  */
 739 struct ieee80211_mcs_info {
 740         u8 rx_mask[IEEE80211_HT_MCS_MASK_LEN];
 741         __le16 rx_highest;
 742         u8 tx_params;
 743         u8 reserved[3];
 744 } __attribute__((packed));
 745
 746 /* 802.11n HT capability MSC set */
 747 #define IEEE80211_HT_MCS_RX_HIGHEST_MASK        0x3ff
 748 #define IEEE80211_HT_MCS_TX_DEFINED             0x01
 749 #define IEEE80211_HT_MCS_TX_RX_DIFF             0x02
 750 /* value 0 == 1 stream etc */
 751 #define IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK    0x0C
 752 #define IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT   2
 753 #define         IEEE80211_HT_MCS_TX_MAX_STREAMS 4
 754 #define IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION  0x10
 755
 756 /*
 757  * 802.11n D5.0 20.3.5 / 20.6 says:
 758  * - indices 0 to 7 and 32 are single spatial stream
 759  * - 8 to 31 are multiple spatial streams using equal modulation
 760  *   [8..15 for two streams, 16..23 for three and 24..31 for four]
 761  * - remainder are multiple spatial streams using unequal modulation
 762  */
 763 #define IEEE80211_HT_MCS_UNEQUAL_MODULATION_START 33
 764 #define IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE \
 765         (IEEE80211_HT_MCS_UNEQUAL_MODULATION_START / 8)
 766
 767 /**
 768  * struct ieee80211_ht_cap - HT capabilities
 769  *
 770  * This structure is the "HT capabilities element" as
 771  * described in 802.11n D5.0 7.3.2.57
 772  */
 773 struct ieee80211_ht_cap {
 774         __le16 cap_info;
 775         u8 ampdu_params_info;
 776
 777         /* 16 bytes MCS information */
 778         struct ieee80211_mcs_info mcs;
 779
 780         __le16 extended_ht_cap_info;
 781         __le32 tx_BF_cap_info;
 782         u8 antenna_selection_info;
 783 } __attribute__ ((packed));
 784
 785 /* 802.11n HT capabilities masks (for cap_info) */
 786 #define IEEE80211_HT_CAP_LDPC_CODING            0x0001
 787 #define IEEE80211_HT_CAP_SUP_WIDTH_20_40        0x0002
 788 #define IEEE80211_HT_CAP_SM_PS                  0x000C
 789 #define IEEE80211_HT_CAP_GRN_FLD                0x0010
 790 #define IEEE80211_HT_CAP_SGI_20                 0x0020
 791 #define IEEE80211_HT_CAP_SGI_40                 0x0040
 792 #define IEEE80211_HT_CAP_TX_STBC                0x0080
 793 #define IEEE80211_HT_CAP_RX_STBC                0x0300
 794 #define IEEE80211_HT_CAP_DELAY_BA               0x0400
 795 #define IEEE80211_HT_CAP_MAX_AMSDU              0x0800
 796 #define IEEE80211_HT_CAP_DSSSCCK40              0x1000
 797 #define IEEE80211_HT_CAP_PSMP_SUPPORT           0x2000
 798 #define IEEE80211_HT_CAP_40MHZ_INTOLERANT       0x4000
 799 #define IEEE80211_HT_CAP_LSIG_TXOP_PROT         0x8000
 800
 801 /* 802.11n HT capability AMPDU settings (for ampdu_params_info) */
 802 #define IEEE80211_HT_AMPDU_PARM_FACTOR          0x03
 803 #define IEEE80211_HT_AMPDU_PARM_DENSITY         0x1C
 804
 805 /**
 806  * struct ieee80211_ht_info - HT information
 807  *
 808  * This structure is the "HT information element" as
 809  * described in 802.11n D5.0 7.3.2.58
 810  */
 811 struct ieee80211_ht_info {
 812         u8 control_chan;
 813         u8 ht_param;
 814         __le16 operation_mode;
 815         __le16 stbc_param;
 816         u8 basic_set[16];
 817 } __attribute__ ((packed));
 818
 819 /* for ht_param */
 820 #define IEEE80211_HT_PARAM_CHA_SEC_OFFSET               0x03
 821 #define         IEEE80211_HT_PARAM_CHA_SEC_NONE         0x00
 822 #define         IEEE80211_HT_PARAM_CHA_SEC_ABOVE        0x01
 823 #define         IEEE80211_HT_PARAM_CHA_SEC_BELOW        0x03
 824 #define IEEE80211_HT_PARAM_CHAN_WIDTH_ANY               0x04
 825 #define IEEE80211_HT_PARAM_RIFS_MODE                    0x08
 826 #define IEEE80211_HT_PARAM_SPSMP_SUPPORT                0x10
 827 #define IEEE80211_HT_PARAM_SERV_INTERVAL_GRAN           0xE0
 828
 829 /* for operation_mode */
 830 #define IEEE80211_HT_OP_MODE_PROTECTION                 0x0003
 831 #define         IEEE80211_HT_OP_MODE_PROTECTION_NONE            0
 832 #define         IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER       1
 833 #define         IEEE80211_HT_OP_MODE_PROTECTION_20MHZ           2
 834 #define         IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED     3
 835 #define IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT           0x0004
 836 #define IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT           0x0010
 837
 838 /* for stbc_param */
 839 #define IEEE80211_HT_STBC_PARAM_DUAL_BEACON             0x0040
 840 #define IEEE80211_HT_STBC_PARAM_DUAL_CTS_PROT           0x0080
 841 #define IEEE80211_HT_STBC_PARAM_STBC_BEACON             0x0100
 842 #define IEEE80211_HT_STBC_PARAM_LSIG_TXOP_FULLPROT      0x0200
 843 #define IEEE80211_HT_STBC_PARAM_PCO_ACTIVE              0x0400
 844 #define IEEE80211_HT_STBC_PARAM_PCO_PHASE               0x0800
 845
 846
 847 /* block-ack parameters */
 848 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
 849 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
 850 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
 851 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
 852 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
 853
 854 /*
 855  * A-PMDU buffer sizes
 856  * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2)
 857  */
 858 #define IEEE80211_MIN_AMPDU_BUF 0x8
 859 #define IEEE80211_MAX_AMPDU_BUF 0x40
 860
 861
 862 /* Spatial Multiplexing Power Save Modes */
 863 #define WLAN_HT_CAP_SM_PS_STATIC        0
 864 #define WLAN_HT_CAP_SM_PS_DYNAMIC       1
 865 #define WLAN_HT_CAP_SM_PS_INVALID       2
 866 #define WLAN_HT_CAP_SM_PS_DISABLED      3
 867
 868 /* Authentication algorithms */
 869 #define WLAN_AUTH_OPEN 0
 870 #define WLAN_AUTH_SHARED_KEY 1
 871 #define WLAN_AUTH_FT 2
 872 #define WLAN_AUTH_LEAP 128
 873
 874 #define WLAN_AUTH_CHALLENGE_LEN 128
 875
 876 #define WLAN_CAPABILITY_ESS             (1<<0)
 877 #define WLAN_CAPABILITY_IBSS            (1<<1)
 878 #define WLAN_CAPABILITY_CF_POLLABLE     (1<<2)
 879 #define WLAN_CAPABILITY_CF_POLL_REQUEST (1<<3)
 880 #define WLAN_CAPABILITY_PRIVACY         (1<<4)
 881 #define WLAN_CAPABILITY_SHORT_PREAMBLE  (1<<5)
 882 #define WLAN_CAPABILITY_PBCC            (1<<6)
 883 #define WLAN_CAPABILITY_CHANNEL_AGILITY (1<<7)
 884
 885 /* 802.11h */
 886 #define WLAN_CAPABILITY_SPECTRUM_MGMT   (1<<8)
 887 #define WLAN_CAPABILITY_QOS             (1<<9)
 888 #define WLAN_CAPABILITY_SHORT_SLOT_TIME (1<<10)
 889 #define WLAN_CAPABILITY_DSSS_OFDM       (1<<13)
 890 /* measurement */
 891 #define IEEE80211_SPCT_MSR_RPRT_MODE_LATE       (1<<0)
 892 #define IEEE80211_SPCT_MSR_RPRT_MODE_INCAPABLE  (1<<1)
 893 #define IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED    (1<<2)
 894
 895 #define IEEE80211_SPCT_MSR_RPRT_TYPE_BASIC      0
 896 #define IEEE80211_SPCT_MSR_RPRT_TYPE_CCA        1
 897 #define IEEE80211_SPCT_MSR_RPRT_TYPE_RPI        2
 898
 899
 900 /* 802.11g ERP information element */
 901 #define WLAN_ERP_NON_ERP_PRESENT (1<<0)
 902 #define WLAN_ERP_USE_PROTECTION (1<<1)
 903 #define WLAN_ERP_BARKER_PREAMBLE (1<<2)
 904
 905 /* WLAN_ERP_BARKER_PREAMBLE values */
 906 enum {
 907         WLAN_ERP_PREAMBLE_SHORT = 0,
 908         WLAN_ERP_PREAMBLE_LONG = 1,
 909 };
 910
 911 /* Status codes */
 912 enum ieee80211_statuscode {
 913         WLAN_STATUS_SUCCESS = 0,
 914         WLAN_STATUS_UNSPECIFIED_FAILURE = 1,
 915         WLAN_STATUS_CAPS_UNSUPPORTED = 10,
 916         WLAN_STATUS_REASSOC_NO_ASSOC = 11,
 917         WLAN_STATUS_ASSOC_DENIED_UNSPEC = 12,
 918         WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG = 13,
 919         WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION = 14,
 920         WLAN_STATUS_CHALLENGE_FAIL = 15,
 921         WLAN_STATUS_AUTH_TIMEOUT = 16,
 922         WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA = 17,
 923         WLAN_STATUS_ASSOC_DENIED_RATES = 18,
 924         /* 802.11b */
 925         WLAN_STATUS_ASSOC_DENIED_NOSHORTPREAMBLE = 19,
 926         WLAN_STATUS_ASSOC_DENIED_NOPBCC = 20,
 927         WLAN_STATUS_ASSOC_DENIED_NOAGILITY = 21,
 928         /* 802.11h */
 929         WLAN_STATUS_ASSOC_DENIED_NOSPECTRUM = 22,
 930         WLAN_STATUS_ASSOC_REJECTED_BAD_POWER = 23,
 931         WLAN_STATUS_ASSOC_REJECTED_BAD_SUPP_CHAN = 24,
 932         /* 802.11g */
 933         WLAN_STATUS_ASSOC_DENIED_NOSHORTTIME = 25,
 934         WLAN_STATUS_ASSOC_DENIED_NODSSSOFDM = 26,
 935         /* 802.11w */
 936         WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY = 30,
 937         WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION = 31,
 938         /* 802.11i */
 939         WLAN_STATUS_INVALID_IE = 40,
 940         WLAN_STATUS_INVALID_GROUP_CIPHER = 41,
 941         WLAN_STATUS_INVALID_PAIRWISE_CIPHER = 42,
 942         WLAN_STATUS_INVALID_AKMP = 43,
 943         WLAN_STATUS_UNSUPP_RSN_VERSION = 44,
 944         WLAN_STATUS_INVALID_RSN_IE_CAP = 45,
 945         WLAN_STATUS_CIPHER_SUITE_REJECTED = 46,
 946         /* 802.11e */
 947         WLAN_STATUS_UNSPECIFIED_QOS = 32,
 948         WLAN_STATUS_ASSOC_DENIED_NOBANDWIDTH = 33,
 949         WLAN_STATUS_ASSOC_DENIED_LOWACK = 34,
 950         WLAN_STATUS_ASSOC_DENIED_UNSUPP_QOS = 35,
 951         WLAN_STATUS_REQUEST_DECLINED = 37,
 952         WLAN_STATUS_INVALID_QOS_PARAM = 38,
 953         WLAN_STATUS_CHANGE_TSPEC = 39,
 954         WLAN_STATUS_WAIT_TS_DELAY = 47,
 955         WLAN_STATUS_NO_DIRECT_LINK = 48,
 956         WLAN_STATUS_STA_NOT_PRESENT = 49,
 957         WLAN_STATUS_STA_NOT_QSTA = 50,
 958 };
 959
 960
 961 /* Reason codes */
 962 enum ieee80211_reasoncode {
 963         WLAN_REASON_UNSPECIFIED = 1,
 964         WLAN_REASON_PREV_AUTH_NOT_VALID = 2,
 965         WLAN_REASON_DEAUTH_LEAVING = 3,
 966         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY = 4,
 967         WLAN_REASON_DISASSOC_AP_BUSY = 5,
 968         WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA = 6,
 969         WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA = 7,
 970         WLAN_REASON_DISASSOC_STA_HAS_LEFT = 8,
 971         WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH = 9,
 972         /* 802.11h */
 973         WLAN_REASON_DISASSOC_BAD_POWER = 10,
 974         WLAN_REASON_DISASSOC_BAD_SUPP_CHAN = 11,
 975         /* 802.11i */
 976         WLAN_REASON_INVALID_IE = 13,
 977         WLAN_REASON_MIC_FAILURE = 14,
 978         WLAN_REASON_4WAY_HANDSHAKE_TIMEOUT = 15,
 979         WLAN_REASON_GROUP_KEY_HANDSHAKE_TIMEOUT = 16,
 980         WLAN_REASON_IE_DIFFERENT = 17,
 981         WLAN_REASON_INVALID_GROUP_CIPHER = 18,
 982         WLAN_REASON_INVALID_PAIRWISE_CIPHER = 19,
 983         WLAN_REASON_INVALID_AKMP = 20,
 984         WLAN_REASON_UNSUPP_RSN_VERSION = 21,
 985         WLAN_REASON_INVALID_RSN_IE_CAP = 22,
 986         WLAN_REASON_IEEE8021X_FAILED = 23,
 987         WLAN_REASON_CIPHER_SUITE_REJECTED = 24,
 988         /* 802.11e */
 989         WLAN_REASON_DISASSOC_UNSPECIFIED_QOS = 32,
 990         WLAN_REASON_DISASSOC_QAP_NO_BANDWIDTH = 33,
 991         WLAN_REASON_DISASSOC_LOW_ACK = 34,
 992         WLAN_REASON_DISASSOC_QAP_EXCEED_TXOP = 35,
 993         WLAN_REASON_QSTA_LEAVE_QBSS = 36,
 994         WLAN_REASON_QSTA_NOT_USE = 37,
 995         WLAN_REASON_QSTA_REQUIRE_SETUP = 38,
 996         WLAN_REASON_QSTA_TIMEOUT = 39,
 997         WLAN_REASON_QSTA_CIPHER_NOT_SUPP = 45,
 998 };
 999
1000
1001 /* Information Element IDs */
1002 enum ieee80211_eid {
1003         WLAN_EID_SSID = 0,
1004         WLAN_EID_SUPP_RATES = 1,
1005         WLAN_EID_FH_PARAMS = 2,
1006         WLAN_EID_DS_PARAMS = 3,
1007         WLAN_EID_CF_PARAMS = 4,
1008         WLAN_EID_TIM = 5,
1009         WLAN_EID_IBSS_PARAMS = 6,
1010         WLAN_EID_CHALLENGE = 16,
1011         /* 802.11d */
1012         WLAN_EID_COUNTRY = 7,
1013         WLAN_EID_HP_PARAMS = 8,
1014         WLAN_EID_HP_TABLE = 9,
1015         WLAN_EID_REQUEST = 10,
1016         /* 802.11e */
1017         WLAN_EID_QBSS_LOAD = 11,
1018         WLAN_EID_EDCA_PARAM_SET = 12,
1019         WLAN_EID_TSPEC = 13,
1020         WLAN_EID_TCLAS = 14,
1021         WLAN_EID_SCHEDULE = 15,
1022         WLAN_EID_TS_DELAY = 43,
1023         WLAN_EID_TCLAS_PROCESSING = 44,
1024         WLAN_EID_QOS_CAPA = 46,
1025         /* 802.11s
1026          *
1027          * All mesh EID numbers are pending IEEE 802.11 ANA approval.
1028          * The numbers have been incremented from those suggested in
1029          * 802.11s/D2.0 so that MESH_CONFIG does not conflict with
1030          * EXT_SUPP_RATES.
1031          */
1032         WLAN_EID_MESH_CONFIG = 51,
1033         WLAN_EID_MESH_ID = 52,
1034         WLAN_EID_PEER_LINK = 55,
1035         WLAN_EID_PREQ = 68,
1036         WLAN_EID_PREP = 69,
1037         WLAN_EID_PERR = 70,
1038         /* 802.11h */
1039         WLAN_EID_PWR_CONSTRAINT = 32,
1040         WLAN_EID_PWR_CAPABILITY = 33,
1041         WLAN_EID_TPC_REQUEST = 34,
1042         WLAN_EID_TPC_REPORT = 35,
1043         WLAN_EID_SUPPORTED_CHANNELS = 36,
1044         WLAN_EID_CHANNEL_SWITCH = 37,
1045         WLAN_EID_MEASURE_REQUEST = 38,
1046         WLAN_EID_MEASURE_REPORT = 39,
1047         WLAN_EID_QUIET = 40,
1048         WLAN_EID_IBSS_DFS = 41,
1049         /* 802.11g */
1050         WLAN_EID_ERP_INFO = 42,
1051         WLAN_EID_EXT_SUPP_RATES = 50,
1052         /* 802.11n */
1053         WLAN_EID_HT_CAPABILITY = 45,
1054         WLAN_EID_HT_INFORMATION = 61,
1055         /* 802.11i */
1056         WLAN_EID_RSN = 48,
1057         WLAN_EID_TIMEOUT_INTERVAL = 56,
1058         WLAN_EID_MMIE = 76 /* 802.11w */,
1059         WLAN_EID_WPA = 221,
1060         WLAN_EID_GENERIC = 221,
1061         WLAN_EID_VENDOR_SPECIFIC = 221,
1062         WLAN_EID_QOS_PARAMETER = 222
1063 };
1064
1065 /* Action category code */
1066 enum ieee80211_category {
1067         WLAN_CATEGORY_SPECTRUM_MGMT = 0,
1068         WLAN_CATEGORY_QOS = 1,
1069         WLAN_CATEGORY_DLS = 2,
1070         WLAN_CATEGORY_BACK = 3,
1071         WLAN_CATEGORY_PUBLIC = 4,
1072         WLAN_CATEGORY_HT = 7,
1073         WLAN_CATEGORY_SA_QUERY = 8,
1074         WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION = 9,
1075         WLAN_CATEGORY_WMM = 17,
1076         WLAN_CATEGORY_VENDOR_SPECIFIC_PROTECTED = 126,
1077         WLAN_CATEGORY_VENDOR_SPECIFIC = 127,
1078 };
1079
1080 /* SPECTRUM_MGMT action code */
1081 enum ieee80211_spectrum_mgmt_actioncode {
1082         WLAN_ACTION_SPCT_MSR_REQ = 0,
1083         WLAN_ACTION_SPCT_MSR_RPRT = 1,
1084         WLAN_ACTION_SPCT_TPC_REQ = 2,
1085         WLAN_ACTION_SPCT_TPC_RPRT = 3,
1086         WLAN_ACTION_SPCT_CHL_SWITCH = 4,
1087 };
1088
1089 /* Security key length */
1090 enum ieee80211_key_len {
1091         WLAN_KEY_LEN_WEP40 = 5,
1092         WLAN_KEY_LEN_WEP104 = 13,
1093         WLAN_KEY_LEN_CCMP = 16,
1094         WLAN_KEY_LEN_TKIP = 32,
1095         WLAN_KEY_LEN_AES_CMAC = 16,
1096 };
1097
1098 /*
1099  * IEEE 802.11-2007 7.3.2.9 Country information element
1100  *
1101  * Minimum length is 8 octets, ie len must be evenly
1102  * divisible by 2
1103  */
1104
1105 /* Although the spec says 8 I'm seeing 6 in practice */
1106 #define IEEE80211_COUNTRY_IE_MIN_LEN    6
1107
1108 /*
1109  * For regulatory extension stuff see IEEE 802.11-2007
1110  * Annex I (page 1141) and Annex J (page 1147). Also
1111  * review 7.3.2.9.
1112  *
1113  * When dot11RegulatoryClassesRequired is true and the
1114  * first_channel/reg_extension_id is >= 201 then the IE
1115  * compromises of the 'ext' struct represented below:
1116  *
1117  *  - Regulatory extension ID - when generating IE this just needs
1118  *    to be monotonically increasing for each triplet passed in
1119  *    the IE
1120  *  - Regulatory class - index into set of rules
1121  *  - Coverage class - index into air propagation time (Table 7-27),
1122  *    in microseconds, you can compute the air propagation time from
1123  *    the index by multiplying by 3, so index 10 yields a propagation
1124  *    of 10 us. Valid values are 0-31, values 32-255 are not defined
1125  *    yet. A value of 0 inicates air propagation of <= 1 us.
1126  *
1127  *  See also Table I.2 for Emission limit sets and table
1128  *  I.3 for Behavior limit sets. Table J.1 indicates how to map
1129  *  a reg_class to an emission limit set and behavior limit set.
1130  */
1131 #define IEEE80211_COUNTRY_EXTENSION_ID 201
1132
1133 /*
1134  *  Channels numbers in the IE must be monotonically increasing
1135  *  if dot11RegulatoryClassesRequired is not true.
1136  *
1137  *  If dot11RegulatoryClassesRequired is true consecutive
1138  *  subband triplets following a regulatory triplet shall
1139  *  have monotonically increasing first_channel number fields.
1140  *
1141  *  Channel numbers shall not overlap.
1142  *
1143  *  Note that max_power is signed.
1144  */
1145 struct ieee80211_country_ie_triplet {
1146         union {
1147                 struct {
1148                         u8 first_channel;
1149                         u8 num_channels;
1150                         s8 max_power;
1151                 } __attribute__ ((packed)) chans;
1152                 struct {
1153                         u8 reg_extension_id;
1154                         u8 reg_class;
1155                         u8 coverage_class;
1156                 } __attribute__ ((packed)) ext;
1157         };
1158 } __attribute__ ((packed));
1159
1160 enum ieee80211_timeout_interval_type {
1161         WLAN_TIMEOUT_REASSOC_DEADLINE = 1 /* 802.11r */,
1162         WLAN_TIMEOUT_KEY_LIFETIME = 2 /* 802.11r */,
1163         WLAN_TIMEOUT_ASSOC_COMEBACK = 3 /* 802.11w */,
1164 };
1165
1166 /* BACK action code */
1167 enum ieee80211_back_actioncode {
1168         WLAN_ACTION_ADDBA_REQ = 0,
1169         WLAN_ACTION_ADDBA_RESP = 1,
1170         WLAN_ACTION_DELBA = 2,
1171 };
1172
1173 /* BACK (block-ack) parties */
1174 enum ieee80211_back_parties {
1175         WLAN_BACK_RECIPIENT = 0,
1176         WLAN_BACK_INITIATOR = 1,
1177         WLAN_BACK_TIMER = 2,
1178 };
1179
1180 /* SA Query action */
1181 enum ieee80211_sa_query_action {
1182         WLAN_ACTION_SA_QUERY_REQUEST = 0,
1183         WLAN_ACTION_SA_QUERY_RESPONSE = 1,
1184 };
1185
1186
1187 /* A-MSDU 802.11n */
1188 #define IEEE80211_QOS_CONTROL_A_MSDU_PRESENT 0x0080
1189
1190 /* cipher suite selectors */
1191 #define WLAN_CIPHER_SUITE_USE_GROUP     0x000FAC00
1192 #define WLAN_CIPHER_SUITE_WEP40         0x000FAC01
1193 #define WLAN_CIPHER_SUITE_TKIP          0x000FAC02
1194 /* reserved:                            0x000FAC03 */
1195 #define WLAN_CIPHER_SUITE_CCMP          0x000FAC04
1196 #define WLAN_CIPHER_SUITE_WEP104        0x000FAC05
1197 #define WLAN_CIPHER_SUITE_AES_CMAC      0x000FAC06
1198
1199 #define WLAN_MAX_KEY_LEN                32
1200
1201 /**
1202  * ieee80211_get_qos_ctl - get pointer to qos control bytes
1203  * @hdr: the frame
1204  *
1205  * The qos ctrl bytes come after the frame_control, duration, seq_num
1206  * and 3 or 4 addresses of length ETH_ALEN.
1207  * 3 addr: 2 + 2 + 2 + 3*6 = 24
1208  * 4 addr: 2 + 2 + 2 + 4*6 = 30
1209  */
1210 static inline u8 *ieee80211_get_qos_ctl(struct ieee80211_hdr *hdr)
1211 {
1212         if (ieee80211_has_a4(hdr->frame_control))
1213                 return (u8 *)hdr + 30;
1214         else
1215                 return (u8 *)hdr + 24;
1216 }
1217
1218 /**
1219  * ieee80211_get_SA - get pointer to SA
1220  * @hdr: the frame
1221  *
1222  * Given an 802.11 frame, this function returns the offset
1223  * to the source address (SA). It does not verify that the
1224  * header is long enough to contain the address, and the
1225  * header must be long enough to contain the frame control
1226  * field.
1227  */
1228 static inline u8 *ieee80211_get_SA(struct ieee80211_hdr *hdr)
1229 {
1230         if (ieee80211_has_a4(hdr->frame_control))
1231                 return hdr->addr4;
1232         if (ieee80211_has_fromds(hdr->frame_control))
1233                 return hdr->addr3;
1234         return hdr->addr2;
1235 }
1236
1237 /**
1238  * ieee80211_get_DA - get pointer to DA
1239  * @hdr: the frame
1240  *
1241  * Given an 802.11 frame, this function returns the offset
1242  * to the destination address (DA). It does not verify that
1243  * the header is long enough to contain the address, and the
1244  * header must be long enough to contain the frame control
1245  * field.
1246  */
1247 static inline u8 *ieee80211_get_DA(struct ieee80211_hdr *hdr)
1248 {
1249         if (ieee80211_has_tods(hdr->frame_control))
1250                 return hdr->addr3;
1251         else
1252                 return hdr->addr1;
1253 }
1254
1255 /**
1256  * ieee80211_is_robust_mgmt_frame - check if frame is a robust management frame
1257  * @hdr: the frame (buffer must include at least the first octet of payload)
1258  */
1259 static inline bool ieee80211_is_robust_mgmt_frame(struct ieee80211_hdr *hdr)
1260 {
1261         if (ieee80211_is_disassoc(hdr->frame_control) ||
1262             ieee80211_is_deauth(hdr->frame_control))
1263                 return true;
1264
1265         if (ieee80211_is_action(hdr->frame_control)) {
1266                 u8 *category;
1267
1268                 /*
1269                  * Action frames, excluding Public Action frames, are Robust
1270                  * Management Frames. However, if we are looking at a Protected
1271                  * frame, skip the check since the data may be encrypted and
1272                  * the frame has already been found to be a Robust Management
1273                  * Frame (by the other end).
1274                  */
1275                 if (ieee80211_has_protected(hdr->frame_control))
1276                         return true;
1277                 category = ((u8 *) hdr) + 24;
1278                 return *category != WLAN_CATEGORY_PUBLIC &&
1279                         *category != WLAN_CATEGORY_HT &&
1280                         *category != WLAN_CATEGORY_VENDOR_SPECIFIC;
1281         }
1282
1283         return false;
1284 }
1285
1286 /**
1287  * ieee80211_fhss_chan_to_freq - get channel frequency
1288  * @channel: the FHSS channel
1289  *
1290  * Convert IEEE802.11 FHSS channel to frequency (MHz)
1291  * Ref IEEE 802.11-2007 section 14.6
1292  */
1293 static inline int ieee80211_fhss_chan_to_freq(int channel)
1294 {
1295         if ((channel > 1) && (channel < 96))
1296                 return channel + 2400;
1297         else
1298                 return -1;
1299 }
1300
1301 /**
1302  * ieee80211_freq_to_fhss_chan - get channel
1303  * @freq: the channels frequency
1304  *
1305  * Convert frequency (MHz) to IEEE802.11 FHSS channel
1306  * Ref IEEE 802.11-2007 section 14.6
1307  */
1308 static inline int ieee80211_freq_to_fhss_chan(int freq)
1309 {
1310         if ((freq > 2401) && (freq < 2496))
1311                 return freq - 2400;
1312         else
1313                 return -1;
1314 }
1315
1316 /**
1317  * ieee80211_dsss_chan_to_freq - get channel center frequency
1318  * @channel: the DSSS channel
1319  *
1320  * Convert IEEE802.11 DSSS channel to the center frequency (MHz).
1321  * Ref IEEE 802.11-2007 section 15.6
1322  */
1323 static inline int ieee80211_dsss_chan_to_freq(int channel)
1324 {
1325         if ((channel > 0) && (channel < 14))
1326                 return 2407 + (channel * 5);
1327         else if (channel == 14)
1328                 return 2484;
1329         else
1330                 return -1;
1331 }
1332
1333 /**
1334  * ieee80211_freq_to_dsss_chan - get channel
1335  * @freq: the frequency
1336  *
1337  * Convert frequency (MHz) to IEEE802.11 DSSS channel
1338  * Ref IEEE 802.11-2007 section 15.6
1339  *
1340  * This routine selects the channel with the closest center frequency.
1341  */
1342 static inline int ieee80211_freq_to_dsss_chan(int freq)
1343 {
1344         if ((freq >= 2410) && (freq < 2475))
1345                 return (freq - 2405) / 5;
1346         else if ((freq >= 2482) && (freq < 2487))
1347                 return 14;
1348         else
1349                 return -1;
1350 }
1351
1352 /* Convert IEEE802.11 HR DSSS channel to frequency (MHz) and back
1353  * Ref IEEE 802.11-2007 section 18.4.6.2
1354  *
1355  * The channels and frequencies are the same as those defined for DSSS
1356  */
1357 #define ieee80211_hr_chan_to_freq(chan) ieee80211_dsss_chan_to_freq(chan)
1358 #define ieee80211_freq_to_hr_chan(freq) ieee80211_freq_to_dsss_chan(freq)
1359
1360 /* Convert IEEE802.11 ERP channel to frequency (MHz) and back
1361  * Ref IEEE 802.11-2007 section 19.4.2
1362  */
1363 #define ieee80211_erp_chan_to_freq(chan) ieee80211_hr_chan_to_freq(chan)
1364 #define ieee80211_freq_to_erp_chan(freq) ieee80211_freq_to_hr_chan(freq)
1365
1366 /**
1367  * ieee80211_ofdm_chan_to_freq - get channel center frequency
1368  * @s_freq: starting frequency == (dotChannelStartingFactor/2) MHz
1369  * @channel: the OFDM channel
1370  *
1371  * Convert IEEE802.11 OFDM channel to center frequency (MHz)
1372  * Ref IEEE 802.11-2007 section 17.3.8.3.2
1373  */
1374 static inline int ieee80211_ofdm_chan_to_freq(int s_freq, int channel)
1375 {
1376         if ((channel > 0) && (channel <= 200) &&
1377             (s_freq >= 4000))
1378                 return s_freq + (channel * 5);
1379         else
1380                 return -1;
1381 }
1382
1383 /**
1384  * ieee80211_freq_to_ofdm_channel - get channel
1385  * @s_freq: starting frequency == (dotChannelStartingFactor/2) MHz
1386  * @freq: the frequency
1387  *
1388  * Convert frequency (MHz) to IEEE802.11 OFDM channel
1389  * Ref IEEE 802.11-2007 section 17.3.8.3.2
1390  *
1391  * This routine selects the channel with the closest center frequency.
1392  */
1393 static inline int ieee80211_freq_to_ofdm_chan(int s_freq, int freq)
1394 {
1395         if ((freq > (s_freq + 2)) && (freq <= (s_freq + 1202)) &&
1396             (s_freq >= 4000))
1397                 return (freq + 2 - s_freq) / 5;
1398         else
1399                 return -1;
1400 }
1401
1402 /**
1403  * ieee80211_tu_to_usec - convert time units (TU) to microseconds
1404  * @tu: the TUs
1405  */
1406 static inline unsigned long ieee80211_tu_to_usec(unsigned long tu)
1407 {
1408         return 1024 * tu;
1409 }
1410
1411 /**
1412  * ieee80211_check_tim - check if AID bit is set in TIM
1413  * @tim: the TIM IE
1414  * @tim_len: length of the TIM IE
1415  * @aid: the AID to look for
1416  */
1417 static inline bool ieee80211_check_tim(struct ieee80211_tim_ie *tim,
1418                                        u8 tim_len, u16 aid)
1419 {
1420         u8 mask;
1421         u8 index, indexn1, indexn2;
1422
1423         if (unlikely(!tim || tim_len < sizeof(*tim)))
1424                 return false;
1425
1426         aid &= 0x3fff;
1427         index = aid / 8;
1428         mask  = 1 << (aid & 7);
1429
1430         indexn1 = tim->bitmap_ctrl & 0xfe;
1431         indexn2 = tim_len + indexn1 - 4;
1432
1433         if (index < indexn1 || index > indexn2)
1434                 return false;
1435
1436         index -= indexn1;
1437
1438         return !!(tim->virtual_map[index] & mask);
1439 }
1440
1441 #endif /* LINUX_IEEE80211_H */