git.oblomov.eu Git - linux-2.6/blob - 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 IEEE80211_H
  16 #define IEEE80211_H
  17
  18 #include <linux/types.h>
  19 #include <asm/byteorder.h>
  20
  21 #define FCS_LEN 4
  22
  23 #define IEEE80211_FCTL_VERS             0x0003
  24 #define IEEE80211_FCTL_FTYPE            0x000c
  25 #define IEEE80211_FCTL_STYPE            0x00f0
  26 #define IEEE80211_FCTL_TODS             0x0100
  27 #define IEEE80211_FCTL_FROMDS           0x0200
  28 #define IEEE80211_FCTL_MOREFRAGS        0x0400
  29 #define IEEE80211_FCTL_RETRY            0x0800
  30 #define IEEE80211_FCTL_PM               0x1000
  31 #define IEEE80211_FCTL_MOREDATA         0x2000
  32 #define IEEE80211_FCTL_PROTECTED        0x4000
  33 #define IEEE80211_FCTL_ORDER            0x8000
  34
  35 #define IEEE80211_SCTL_FRAG             0x000F
  36 #define IEEE80211_SCTL_SEQ              0xFFF0
  37
  38 #define IEEE80211_FTYPE_MGMT            0x0000
  39 #define IEEE80211_FTYPE_CTL             0x0004
  40 #define IEEE80211_FTYPE_DATA            0x0008
  41
  42 /* management */
  43 #define IEEE80211_STYPE_ASSOC_REQ       0x0000
  44 #define IEEE80211_STYPE_ASSOC_RESP      0x0010
  45 #define IEEE80211_STYPE_REASSOC_REQ     0x0020
  46 #define IEEE80211_STYPE_REASSOC_RESP    0x0030
  47 #define IEEE80211_STYPE_PROBE_REQ       0x0040
  48 #define IEEE80211_STYPE_PROBE_RESP      0x0050
  49 #define IEEE80211_STYPE_BEACON          0x0080
  50 #define IEEE80211_STYPE_ATIM            0x0090
  51 #define IEEE80211_STYPE_DISASSOC        0x00A0
  52 #define IEEE80211_STYPE_AUTH            0x00B0
  53 #define IEEE80211_STYPE_DEAUTH          0x00C0
  54 #define IEEE80211_STYPE_ACTION          0x00D0
  55
  56 /* control */
  57 #define IEEE80211_STYPE_BACK_REQ        0x0080
  58 #define IEEE80211_STYPE_BACK            0x0090
  59 #define IEEE80211_STYPE_PSPOLL          0x00A0
  60 #define IEEE80211_STYPE_RTS             0x00B0
  61 #define IEEE80211_STYPE_CTS             0x00C0
  62 #define IEEE80211_STYPE_ACK             0x00D0
  63 #define IEEE80211_STYPE_CFEND           0x00E0
  64 #define IEEE80211_STYPE_CFENDACK        0x00F0
  65
  66 /* data */
  67 #define IEEE80211_STYPE_DATA                    0x0000
  68 #define IEEE80211_STYPE_DATA_CFACK              0x0010
  69 #define IEEE80211_STYPE_DATA_CFPOLL             0x0020
  70 #define IEEE80211_STYPE_DATA_CFACKPOLL          0x0030
  71 #define IEEE80211_STYPE_NULLFUNC                0x0040
  72 #define IEEE80211_STYPE_CFACK                   0x0050
  73 #define IEEE80211_STYPE_CFPOLL                  0x0060
  74 #define IEEE80211_STYPE_CFACKPOLL               0x0070
  75 #define IEEE80211_STYPE_QOS_DATA                0x0080
  76 #define IEEE80211_STYPE_QOS_DATA_CFACK          0x0090
  77 #define IEEE80211_STYPE_QOS_DATA_CFPOLL         0x00A0
  78 #define IEEE80211_STYPE_QOS_DATA_CFACKPOLL      0x00B0
  79 #define IEEE80211_STYPE_QOS_NULLFUNC            0x00C0
  80 #define IEEE80211_STYPE_QOS_CFACK               0x00D0
  81 #define IEEE80211_STYPE_QOS_CFPOLL              0x00E0
  82 #define IEEE80211_STYPE_QOS_CFACKPOLL           0x00F0
  83
  84
  85 /* miscellaneous IEEE 802.11 constants */
  86 #define IEEE80211_MAX_FRAG_THRESHOLD    2352
  87 #define IEEE80211_MAX_RTS_THRESHOLD     2353
  88 #define IEEE80211_MAX_AID               2007
  89 #define IEEE80211_MAX_TIM_LEN           251
  90 /* Maximum size for the MA-UNITDATA primitive, 802.11 standard section
  91    6.2.1.1.2.
  92
  93    802.11e clarifies the figure in section 7.1.2. The frame body is
  94    up to 2304 octets long (maximum MSDU size) plus any crypt overhead. */
  95 #define IEEE80211_MAX_DATA_LEN          2304
  96 /* 30 byte 4 addr hdr, 2 byte QoS, 2304 byte MSDU, 12 byte crypt, 4 byte FCS */
  97 #define IEEE80211_MAX_FRAME_LEN         2352
  98
  99 #define IEEE80211_MAX_SSID_LEN          32
 100 #define IEEE80211_MAX_MESH_ID_LEN       32
 101 #define IEEE80211_QOS_CTL_LEN           2
 102
 103 struct ieee80211_hdr {
 104         __le16 frame_control;
 105         __le16 duration_id;
 106         u8 addr1[6];
 107         u8 addr2[6];
 108         u8 addr3[6];
 109         __le16 seq_ctrl;
 110         u8 addr4[6];
 111 } __attribute__ ((packed));
 112
 113 /**
 114  * ieee80211_has_tods - check if IEEE80211_FCTL_TODS is set
 115  * @fc: frame control bytes in little-endian byteorder
 116  */
 117 static inline int ieee80211_has_tods(__le16 fc)
 118 {
 119         return (fc & cpu_to_le16(IEEE80211_FCTL_TODS)) != 0;
 120 }
 121
 122 /**
 123  * ieee80211_has_fromds - check if IEEE80211_FCTL_FROMDS is set
 124  * @fc: frame control bytes in little-endian byteorder
 125  */
 126 static inline int ieee80211_has_fromds(__le16 fc)
 127 {
 128         return (fc & cpu_to_le16(IEEE80211_FCTL_FROMDS)) != 0;
 129 }
 130
 131 /**
 132  * ieee80211_has_a4 - check if IEEE80211_FCTL_TODS and IEEE80211_FCTL_FROMDS are set
 133  * @fc: frame control bytes in little-endian byteorder
 134  */
 135 static inline int ieee80211_has_a4(__le16 fc)
 136 {
 137         __le16 tmp = cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS);
 138         return (fc & tmp) == tmp;
 139 }
 140
 141 /**
 142  * ieee80211_has_morefrags - check if IEEE80211_FCTL_MOREFRAGS is set
 143  * @fc: frame control bytes in little-endian byteorder
 144  */
 145 static inline int ieee80211_has_morefrags(__le16 fc)
 146 {
 147         return (fc & cpu_to_le16(IEEE80211_FCTL_MOREFRAGS)) != 0;
 148 }
 149
 150 /**
 151  * ieee80211_has_retry - check if IEEE80211_FCTL_RETRY is set
 152  * @fc: frame control bytes in little-endian byteorder
 153  */
 154 static inline int ieee80211_has_retry(__le16 fc)
 155 {
 156         return (fc & cpu_to_le16(IEEE80211_FCTL_RETRY)) != 0;
 157 }
 158
 159 /**
 160  * ieee80211_has_pm - check if IEEE80211_FCTL_PM is set
 161  * @fc: frame control bytes in little-endian byteorder
 162  */
 163 static inline int ieee80211_has_pm(__le16 fc)
 164 {
 165         return (fc & cpu_to_le16(IEEE80211_FCTL_PM)) != 0;
 166 }
 167
 168 /**
 169  * ieee80211_has_moredata - check if IEEE80211_FCTL_MOREDATA is set
 170  * @fc: frame control bytes in little-endian byteorder
 171  */
 172 static inline int ieee80211_has_moredata(__le16 fc)
 173 {
 174         return (fc & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) != 0;
 175 }
 176
 177 /**
 178  * ieee80211_has_protected - check if IEEE80211_FCTL_PROTECTED is set
 179  * @fc: frame control bytes in little-endian byteorder
 180  */
 181 static inline int ieee80211_has_protected(__le16 fc)
 182 {
 183         return (fc & cpu_to_le16(IEEE80211_FCTL_PROTECTED)) != 0;
 184 }
 185
 186 /**
 187  * ieee80211_has_order - check if IEEE80211_FCTL_ORDER is set
 188  * @fc: frame control bytes in little-endian byteorder
 189  */
 190 static inline int ieee80211_has_order(__le16 fc)
 191 {
 192         return (fc & cpu_to_le16(IEEE80211_FCTL_ORDER)) != 0;
 193 }
 194
 195 /**
 196  * ieee80211_is_mgmt - check if type is IEEE80211_FTYPE_MGMT
 197  * @fc: frame control bytes in little-endian byteorder
 198  */
 199 static inline int ieee80211_is_mgmt(__le16 fc)
 200 {
 201         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
 202                cpu_to_le16(IEEE80211_FTYPE_MGMT);
 203 }
 204
 205 /**
 206  * ieee80211_is_ctl - check if type is IEEE80211_FTYPE_CTL
 207  * @fc: frame control bytes in little-endian byteorder
 208  */
 209 static inline int ieee80211_is_ctl(__le16 fc)
 210 {
 211         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
 212                cpu_to_le16(IEEE80211_FTYPE_CTL);
 213 }
 214
 215 /**
 216  * ieee80211_is_data - check if type is IEEE80211_FTYPE_DATA
 217  * @fc: frame control bytes in little-endian byteorder
 218  */
 219 static inline int ieee80211_is_data(__le16 fc)
 220 {
 221         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
 222                cpu_to_le16(IEEE80211_FTYPE_DATA);
 223 }
 224
 225 /**
 226  * ieee80211_is_data_qos - check if type is IEEE80211_FTYPE_DATA and IEEE80211_STYPE_QOS_DATA is set
 227  * @fc: frame control bytes in little-endian byteorder
 228  */
 229 static inline int ieee80211_is_data_qos(__le16 fc)
 230 {
 231         /*
 232          * mask with QOS_DATA rather than IEEE80211_FCTL_STYPE as we just need
 233          * to check the one bit
 234          */
 235         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_STYPE_QOS_DATA)) ==
 236                cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_DATA);
 237 }
 238
 239 /**
 240  * ieee80211_is_data_present - check if type is IEEE80211_FTYPE_DATA and has data
 241  * @fc: frame control bytes in little-endian byteorder
 242  */
 243 static inline int ieee80211_is_data_present(__le16 fc)
 244 {
 245         /*
 246          * mask with 0x40 and test that that bit is clear to only return true
 247          * for the data-containing substypes.
 248          */
 249         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | 0x40)) ==
 250                cpu_to_le16(IEEE80211_FTYPE_DATA);
 251 }
 252
 253 /**
 254  * ieee80211_is_assoc_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ASSOC_REQ
 255  * @fc: frame control bytes in little-endian byteorder
 256  */
 257 static inline int ieee80211_is_assoc_req(__le16 fc)
 258 {
 259         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 260                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ASSOC_REQ);
 261 }
 262
 263 /**
 264  * ieee80211_is_assoc_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ASSOC_RESP
 265  * @fc: frame control bytes in little-endian byteorder
 266  */
 267 static inline int ieee80211_is_assoc_resp(__le16 fc)
 268 {
 269         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 270                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ASSOC_RESP);
 271 }
 272
 273 /**
 274  * ieee80211_is_reassoc_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_REASSOC_REQ
 275  * @fc: frame control bytes in little-endian byteorder
 276  */
 277 static inline int ieee80211_is_reassoc_req(__le16 fc)
 278 {
 279         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 280                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_REASSOC_REQ);
 281 }
 282
 283 /**
 284  * ieee80211_is_reassoc_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_REASSOC_RESP
 285  * @fc: frame control bytes in little-endian byteorder
 286  */
 287 static inline int ieee80211_is_reassoc_resp(__le16 fc)
 288 {
 289         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 290                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_REASSOC_RESP);
 291 }
 292
 293 /**
 294  * ieee80211_is_probe_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_PROBE_REQ
 295  * @fc: frame control bytes in little-endian byteorder
 296  */
 297 static inline int ieee80211_is_probe_req(__le16 fc)
 298 {
 299         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 300                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_REQ);
 301 }
 302
 303 /**
 304  * ieee80211_is_probe_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_PROBE_RESP
 305  * @fc: frame control bytes in little-endian byteorder
 306  */
 307 static inline int ieee80211_is_probe_resp(__le16 fc)
 308 {
 309         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 310                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_RESP);
 311 }
 312
 313 /**
 314  * ieee80211_is_beacon - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_BEACON
 315  * @fc: frame control bytes in little-endian byteorder
 316  */
 317 static inline int ieee80211_is_beacon(__le16 fc)
 318 {
 319         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 320                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON);
 321 }
 322
 323 /**
 324  * ieee80211_is_atim - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ATIM
 325  * @fc: frame control bytes in little-endian byteorder
 326  */
 327 static inline int ieee80211_is_atim(__le16 fc)
 328 {
 329         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 330                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ATIM);
 331 }
 332
 333 /**
 334  * ieee80211_is_disassoc - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_DISASSOC
 335  * @fc: frame control bytes in little-endian byteorder
 336  */
 337 static inline int ieee80211_is_disassoc(__le16 fc)
 338 {
 339         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 340                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DISASSOC);
 341 }
 342
 343 /**
 344  * ieee80211_is_auth - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_AUTH
 345  * @fc: frame control bytes in little-endian byteorder
 346  */
 347 static inline int ieee80211_is_auth(__le16 fc)
 348 {
 349         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 350                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH);
 351 }
 352
 353 /**
 354  * ieee80211_is_deauth - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_DEAUTH
 355  * @fc: frame control bytes in little-endian byteorder
 356  */
 357 static inline int ieee80211_is_deauth(__le16 fc)
 358 {
 359         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 360                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DEAUTH);
 361 }
 362
 363 /**
 364  * ieee80211_is_action - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ACTION
 365  * @fc: frame control bytes in little-endian byteorder
 366  */
 367 static inline int ieee80211_is_action(__le16 fc)
 368 {
 369         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 370                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION);
 371 }
 372
 373 /**
 374  * ieee80211_is_back_req - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_BACK_REQ
 375  * @fc: frame control bytes in little-endian byteorder
 376  */
 377 static inline int ieee80211_is_back_req(__le16 fc)
 378 {
 379         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 380                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK_REQ);
 381 }
 382
 383 /**
 384  * ieee80211_is_back - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_BACK
 385  * @fc: frame control bytes in little-endian byteorder
 386  */
 387 static inline int ieee80211_is_back(__le16 fc)
 388 {
 389         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 390                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK);
 391 }
 392
 393 /**
 394  * ieee80211_is_pspoll - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_PSPOLL
 395  * @fc: frame control bytes in little-endian byteorder
 396  */
 397 static inline int ieee80211_is_pspoll(__le16 fc)
 398 {
 399         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 400                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
 401 }
 402
 403 /**
 404  * ieee80211_is_rts - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_RTS
 405  * @fc: frame control bytes in little-endian byteorder
 406  */
 407 static inline int ieee80211_is_rts(__le16 fc)
 408 {
 409         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 410                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
 411 }
 412
 413 /**
 414  * ieee80211_is_cts - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CTS
 415  * @fc: frame control bytes in little-endian byteorder
 416  */
 417 static inline int ieee80211_is_cts(__le16 fc)
 418 {
 419         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 420                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
 421 }
 422
 423 /**
 424  * ieee80211_is_ack - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_ACK
 425  * @fc: frame control bytes in little-endian byteorder
 426  */
 427 static inline int ieee80211_is_ack(__le16 fc)
 428 {
 429         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 430                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK);
 431 }
 432
 433 /**
 434  * ieee80211_is_cfend - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CFEND
 435  * @fc: frame control bytes in little-endian byteorder
 436  */
 437 static inline int ieee80211_is_cfend(__le16 fc)
 438 {
 439         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 440                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CFEND);
 441 }
 442
 443 /**
 444  * ieee80211_is_cfendack - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CFENDACK
 445  * @fc: frame control bytes in little-endian byteorder
 446  */
 447 static inline int ieee80211_is_cfendack(__le16 fc)
 448 {
 449         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 450                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CFENDACK);
 451 }
 452
 453 /**
 454  * ieee80211_is_nullfunc - check if FTYPE=IEEE80211_FTYPE_DATA and STYPE=IEEE80211_STYPE_NULLFUNC
 455  * @fc: frame control bytes in little-endian byteorder
 456  */
 457 static inline int ieee80211_is_nullfunc(__le16 fc)
 458 {
 459         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 460                cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC);
 461 }
 462
 463 struct ieee80211s_hdr {
 464         u8 flags;
 465         u8 ttl;
 466         __le32 seqnum;
 467         u8 eaddr1[6];
 468         u8 eaddr2[6];
 469         u8 eaddr3[6];
 470 } __attribute__ ((packed));
 471
 472
 473 struct ieee80211_mgmt {
 474         __le16 frame_control;
 475         __le16 duration;
 476         u8 da[6];
 477         u8 sa[6];
 478         u8 bssid[6];
 479         __le16 seq_ctrl;
 480         union {
 481                 struct {
 482                         __le16 auth_alg;
 483                         __le16 auth_transaction;
 484                         __le16 status_code;
 485                         /* possibly followed by Challenge text */
 486                         u8 variable[0];
 487                 } __attribute__ ((packed)) auth;
 488                 struct {
 489                         __le16 reason_code;
 490                 } __attribute__ ((packed)) deauth;
 491                 struct {
 492                         __le16 capab_info;
 493                         __le16 listen_interval;
 494                         /* followed by SSID and Supported rates */
 495                         u8 variable[0];
 496                 } __attribute__ ((packed)) assoc_req;
 497                 struct {
 498                         __le16 capab_info;
 499                         __le16 status_code;
 500                         __le16 aid;
 501                         /* followed by Supported rates */
 502                         u8 variable[0];
 503                 } __attribute__ ((packed)) assoc_resp, reassoc_resp;
 504                 struct {
 505                         __le16 capab_info;
 506                         __le16 listen_interval;
 507                         u8 current_ap[6];
 508                         /* followed by SSID and Supported rates */
 509                         u8 variable[0];
 510                 } __attribute__ ((packed)) reassoc_req;
 511                 struct {
 512                         __le16 reason_code;
 513                 } __attribute__ ((packed)) disassoc;
 514                 struct {
 515                         __le64 timestamp;
 516                         __le16 beacon_int;
 517                         __le16 capab_info;
 518                         /* followed by some of SSID, Supported rates,
 519                          * FH Params, DS Params, CF Params, IBSS Params, TIM */
 520                         u8 variable[0];
 521                 } __attribute__ ((packed)) beacon;
 522                 struct {
 523                         /* only variable items: SSID, Supported rates */
 524                         u8 variable[0];
 525                 } __attribute__ ((packed)) probe_req;
 526                 struct {
 527                         __le64 timestamp;
 528                         __le16 beacon_int;
 529                         __le16 capab_info;
 530                         /* followed by some of SSID, Supported rates,
 531                          * FH Params, DS Params, CF Params, IBSS Params */
 532                         u8 variable[0];
 533                 } __attribute__ ((packed)) probe_resp;
 534                 struct {
 535                         u8 category;
 536                         union {
 537                                 struct {
 538                                         u8 action_code;
 539                                         u8 dialog_token;
 540                                         u8 status_code;
 541                                         u8 variable[0];
 542                                 } __attribute__ ((packed)) wme_action;
 543                                 struct{
 544                                         u8 action_code;
 545                                         u8 element_id;
 546                                         u8 length;
 547                                         u8 switch_mode;
 548                                         u8 new_chan;
 549                                         u8 switch_count;
 550                                 } __attribute__((packed)) chan_switch;
 551                                 struct{
 552                                         u8 action_code;
 553                                         u8 dialog_token;
 554                                         __le16 capab;
 555                                         __le16 timeout;
 556                                         __le16 start_seq_num;
 557                                 } __attribute__((packed)) addba_req;
 558                                 struct{
 559                                         u8 action_code;
 560                                         u8 dialog_token;
 561                                         __le16 status;
 562                                         __le16 capab;
 563                                         __le16 timeout;
 564                                 } __attribute__((packed)) addba_resp;
 565                                 struct{
 566                                         u8 action_code;
 567                                         __le16 params;
 568                                         __le16 reason_code;
 569                                 } __attribute__((packed)) delba;
 570                                 struct{
 571                                         u8 action_code;
 572                                         /* capab_info for open and confirm,
 573                                          * reason for close
 574                                          */
 575                                         __le16 aux;
 576                                         /* Followed in plink_confirm by status
 577                                          * code, AID and supported rates,
 578                                          * and directly by supported rates in
 579                                          * plink_open and plink_close
 580                                          */
 581                                         u8 variable[0];
 582                                 } __attribute__((packed)) plink_action;
 583                                 struct{
 584                                         u8 action_code;
 585                                         u8 variable[0];
 586                                 } __attribute__((packed)) mesh_action;
 587                         } u;
 588                 } __attribute__ ((packed)) action;
 589         } u;
 590 } __attribute__ ((packed));
 591
 592
 593 /* Control frames */
 594 struct ieee80211_rts {
 595         __le16 frame_control;
 596         __le16 duration;
 597         u8 ra[6];
 598         u8 ta[6];
 599 } __attribute__ ((packed));
 600
 601 struct ieee80211_cts {
 602         __le16 frame_control;
 603         __le16 duration;
 604         u8 ra[6];
 605 } __attribute__ ((packed));
 606
 607 /**
 608  * struct ieee80211_bar - HT Block Ack Request
 609  *
 610  * This structure refers to "HT BlockAckReq" as
 611  * described in 802.11n draft section 7.2.1.7.1
 612  */
 613 struct ieee80211_bar {
 614         __le16 frame_control;
 615         __le16 duration;
 616         __u8 ra[6];
 617         __u8 ta[6];
 618         __le16 control;
 619         __le16 start_seq_num;
 620 } __attribute__((packed));
 621
 622 /**
 623  * struct ieee80211_ht_cap - HT capabilities
 624  *
 625  * This structure refers to "HT capabilities element" as
 626  * described in 802.11n draft section 7.3.2.52
 627  */
 628 struct ieee80211_ht_cap {
 629         __le16 cap_info;
 630         u8 ampdu_params_info;
 631         u8 supp_mcs_set[16];
 632         __le16 extended_ht_cap_info;
 633         __le32 tx_BF_cap_info;
 634         u8 antenna_selection_info;
 635 } __attribute__ ((packed));
 636
 637 /**
 638  * struct ieee80211_ht_cap - HT additional information
 639  *
 640  * This structure refers to "HT information element" as
 641  * described in 802.11n draft section 7.3.2.53
 642  */
 643 struct ieee80211_ht_addt_info {
 644         u8 control_chan;
 645         u8 ht_param;
 646         __le16 operation_mode;
 647         __le16 stbc_param;
 648         u8 basic_set[16];
 649 } __attribute__ ((packed));
 650
 651 /* 802.11n HT capabilities masks */
 652 #define IEEE80211_HT_CAP_SUP_WIDTH              0x0002
 653 #define IEEE80211_HT_CAP_MIMO_PS                0x000C
 654 #define IEEE80211_HT_CAP_GRN_FLD                0x0010
 655 #define IEEE80211_HT_CAP_SGI_20                 0x0020
 656 #define IEEE80211_HT_CAP_SGI_40                 0x0040
 657 #define IEEE80211_HT_CAP_DELAY_BA               0x0400
 658 #define IEEE80211_HT_CAP_MAX_AMSDU              0x0800
 659 /* 802.11n HT capability AMPDU settings */
 660 #define IEEE80211_HT_CAP_AMPDU_FACTOR           0x03
 661 #define IEEE80211_HT_CAP_AMPDU_DENSITY          0x1C
 662 /* 802.11n HT capability MSC set */
 663 #define IEEE80211_SUPP_MCS_SET_UEQM             4
 664 #define IEEE80211_HT_CAP_MAX_STREAMS            4
 665 #define IEEE80211_SUPP_MCS_SET_LEN              10
 666 /* maximum streams the spec allows */
 667 #define IEEE80211_HT_CAP_MCS_TX_DEFINED         0x01
 668 #define IEEE80211_HT_CAP_MCS_TX_RX_DIFF         0x02
 669 #define IEEE80211_HT_CAP_MCS_TX_STREAMS         0x0C
 670 #define IEEE80211_HT_CAP_MCS_TX_UEQM            0x10
 671 /* 802.11n HT IE masks */
 672 #define IEEE80211_HT_IE_CHA_SEC_OFFSET          0x03
 673 #define IEEE80211_HT_IE_CHA_SEC_NONE            0x00
 674 #define IEEE80211_HT_IE_CHA_SEC_ABOVE           0x01
 675 #define IEEE80211_HT_IE_CHA_SEC_BELOW           0x03
 676 #define IEEE80211_HT_IE_CHA_WIDTH               0x04
 677 #define IEEE80211_HT_IE_HT_PROTECTION           0x0003
 678 #define IEEE80211_HT_IE_NON_GF_STA_PRSNT        0x0004
 679 #define IEEE80211_HT_IE_NON_HT_STA_PRSNT        0x0010
 680
 681 /* MIMO Power Save Modes */
 682 #define WLAN_HT_CAP_MIMO_PS_STATIC      0
 683 #define WLAN_HT_CAP_MIMO_PS_DYNAMIC     1
 684 #define WLAN_HT_CAP_MIMO_PS_INVALID     2
 685 #define WLAN_HT_CAP_MIMO_PS_DISABLED    3
 686
 687 /* Authentication algorithms */
 688 #define WLAN_AUTH_OPEN 0
 689 #define WLAN_AUTH_SHARED_KEY 1
 690 #define WLAN_AUTH_FAST_BSS_TRANSITION 2
 691 #define WLAN_AUTH_LEAP 128
 692
 693 #define WLAN_AUTH_CHALLENGE_LEN 128
 694
 695 #define WLAN_CAPABILITY_ESS             (1<<0)
 696 #define WLAN_CAPABILITY_IBSS            (1<<1)
 697 #define WLAN_CAPABILITY_CF_POLLABLE     (1<<2)
 698 #define WLAN_CAPABILITY_CF_POLL_REQUEST (1<<3)
 699 #define WLAN_CAPABILITY_PRIVACY         (1<<4)
 700 #define WLAN_CAPABILITY_SHORT_PREAMBLE  (1<<5)
 701 #define WLAN_CAPABILITY_PBCC            (1<<6)
 702 #define WLAN_CAPABILITY_CHANNEL_AGILITY (1<<7)
 703 /* 802.11h */
 704 #define WLAN_CAPABILITY_SPECTRUM_MGMT   (1<<8)
 705 #define WLAN_CAPABILITY_QOS             (1<<9)
 706 #define WLAN_CAPABILITY_SHORT_SLOT_TIME (1<<10)
 707 #define WLAN_CAPABILITY_DSSS_OFDM       (1<<13)
 708
 709 /* 802.11g ERP information element */
 710 #define WLAN_ERP_NON_ERP_PRESENT (1<<0)
 711 #define WLAN_ERP_USE_PROTECTION (1<<1)
 712 #define WLAN_ERP_BARKER_PREAMBLE (1<<2)
 713
 714 /* WLAN_ERP_BARKER_PREAMBLE values */
 715 enum {
 716         WLAN_ERP_PREAMBLE_SHORT = 0,
 717         WLAN_ERP_PREAMBLE_LONG = 1,
 718 };
 719
 720 /* Status codes */
 721 enum ieee80211_statuscode {
 722         WLAN_STATUS_SUCCESS = 0,
 723         WLAN_STATUS_UNSPECIFIED_FAILURE = 1,
 724         WLAN_STATUS_CAPS_UNSUPPORTED = 10,
 725         WLAN_STATUS_REASSOC_NO_ASSOC = 11,
 726         WLAN_STATUS_ASSOC_DENIED_UNSPEC = 12,
 727         WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG = 13,
 728         WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION = 14,
 729         WLAN_STATUS_CHALLENGE_FAIL = 15,
 730         WLAN_STATUS_AUTH_TIMEOUT = 16,
 731         WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA = 17,
 732         WLAN_STATUS_ASSOC_DENIED_RATES = 18,
 733         /* 802.11b */
 734         WLAN_STATUS_ASSOC_DENIED_NOSHORTPREAMBLE = 19,
 735         WLAN_STATUS_ASSOC_DENIED_NOPBCC = 20,
 736         WLAN_STATUS_ASSOC_DENIED_NOAGILITY = 21,
 737         /* 802.11h */
 738         WLAN_STATUS_ASSOC_DENIED_NOSPECTRUM = 22,
 739         WLAN_STATUS_ASSOC_REJECTED_BAD_POWER = 23,
 740         WLAN_STATUS_ASSOC_REJECTED_BAD_SUPP_CHAN = 24,
 741         /* 802.11g */
 742         WLAN_STATUS_ASSOC_DENIED_NOSHORTTIME = 25,
 743         WLAN_STATUS_ASSOC_DENIED_NODSSSOFDM = 26,
 744         /* 802.11i */
 745         WLAN_STATUS_INVALID_IE = 40,
 746         WLAN_STATUS_INVALID_GROUP_CIPHER = 41,
 747         WLAN_STATUS_INVALID_PAIRWISE_CIPHER = 42,
 748         WLAN_STATUS_INVALID_AKMP = 43,
 749         WLAN_STATUS_UNSUPP_RSN_VERSION = 44,
 750         WLAN_STATUS_INVALID_RSN_IE_CAP = 45,
 751         WLAN_STATUS_CIPHER_SUITE_REJECTED = 46,
 752         /* 802.11e */
 753         WLAN_STATUS_UNSPECIFIED_QOS = 32,
 754         WLAN_STATUS_ASSOC_DENIED_NOBANDWIDTH = 33,
 755         WLAN_STATUS_ASSOC_DENIED_LOWACK = 34,
 756         WLAN_STATUS_ASSOC_DENIED_UNSUPP_QOS = 35,
 757         WLAN_STATUS_REQUEST_DECLINED = 37,
 758         WLAN_STATUS_INVALID_QOS_PARAM = 38,
 759         WLAN_STATUS_CHANGE_TSPEC = 39,
 760         WLAN_STATUS_WAIT_TS_DELAY = 47,
 761         WLAN_STATUS_NO_DIRECT_LINK = 48,
 762         WLAN_STATUS_STA_NOT_PRESENT = 49,
 763         WLAN_STATUS_STA_NOT_QSTA = 50,
 764 };
 765
 766
 767 /* Reason codes */
 768 enum ieee80211_reasoncode {
 769         WLAN_REASON_UNSPECIFIED = 1,
 770         WLAN_REASON_PREV_AUTH_NOT_VALID = 2,
 771         WLAN_REASON_DEAUTH_LEAVING = 3,
 772         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY = 4,
 773         WLAN_REASON_DISASSOC_AP_BUSY = 5,
 774         WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA = 6,
 775         WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA = 7,
 776         WLAN_REASON_DISASSOC_STA_HAS_LEFT = 8,
 777         WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH = 9,
 778         /* 802.11h */
 779         WLAN_REASON_DISASSOC_BAD_POWER = 10,
 780         WLAN_REASON_DISASSOC_BAD_SUPP_CHAN = 11,
 781         /* 802.11i */
 782         WLAN_REASON_INVALID_IE = 13,
 783         WLAN_REASON_MIC_FAILURE = 14,
 784         WLAN_REASON_4WAY_HANDSHAKE_TIMEOUT = 15,
 785         WLAN_REASON_GROUP_KEY_HANDSHAKE_TIMEOUT = 16,
 786         WLAN_REASON_IE_DIFFERENT = 17,
 787         WLAN_REASON_INVALID_GROUP_CIPHER = 18,
 788         WLAN_REASON_INVALID_PAIRWISE_CIPHER = 19,
 789         WLAN_REASON_INVALID_AKMP = 20,
 790         WLAN_REASON_UNSUPP_RSN_VERSION = 21,
 791         WLAN_REASON_INVALID_RSN_IE_CAP = 22,
 792         WLAN_REASON_IEEE8021X_FAILED = 23,
 793         WLAN_REASON_CIPHER_SUITE_REJECTED = 24,
 794         /* 802.11e */
 795         WLAN_REASON_DISASSOC_UNSPECIFIED_QOS = 32,
 796         WLAN_REASON_DISASSOC_QAP_NO_BANDWIDTH = 33,
 797         WLAN_REASON_DISASSOC_LOW_ACK = 34,
 798         WLAN_REASON_DISASSOC_QAP_EXCEED_TXOP = 35,
 799         WLAN_REASON_QSTA_LEAVE_QBSS = 36,
 800         WLAN_REASON_QSTA_NOT_USE = 37,
 801         WLAN_REASON_QSTA_REQUIRE_SETUP = 38,
 802         WLAN_REASON_QSTA_TIMEOUT = 39,
 803         WLAN_REASON_QSTA_CIPHER_NOT_SUPP = 45,
 804 };
 805
 806
 807 /* Information Element IDs */
 808 enum ieee80211_eid {
 809         WLAN_EID_SSID = 0,
 810         WLAN_EID_SUPP_RATES = 1,
 811         WLAN_EID_FH_PARAMS = 2,
 812         WLAN_EID_DS_PARAMS = 3,
 813         WLAN_EID_CF_PARAMS = 4,
 814         WLAN_EID_TIM = 5,
 815         WLAN_EID_IBSS_PARAMS = 6,
 816         WLAN_EID_CHALLENGE = 16,
 817         /* 802.11d */
 818         WLAN_EID_COUNTRY = 7,
 819         WLAN_EID_HP_PARAMS = 8,
 820         WLAN_EID_HP_TABLE = 9,
 821         WLAN_EID_REQUEST = 10,
 822         /* 802.11e */
 823         WLAN_EID_QBSS_LOAD = 11,
 824         WLAN_EID_EDCA_PARAM_SET = 12,
 825         WLAN_EID_TSPEC = 13,
 826         WLAN_EID_TCLAS = 14,
 827         WLAN_EID_SCHEDULE = 15,
 828         WLAN_EID_TS_DELAY = 43,
 829         WLAN_EID_TCLAS_PROCESSING = 44,
 830         WLAN_EID_QOS_CAPA = 46,
 831         /* 802.11s
 832          *
 833          * All mesh EID numbers are pending IEEE 802.11 ANA approval.
 834          * The numbers have been incremented from those suggested in
 835          * 802.11s/D2.0 so that MESH_CONFIG does not conflict with
 836          * EXT_SUPP_RATES.
 837          */
 838         WLAN_EID_MESH_CONFIG = 51,
 839         WLAN_EID_MESH_ID = 52,
 840         WLAN_EID_PEER_LINK = 55,
 841         WLAN_EID_PREQ = 68,
 842         WLAN_EID_PREP = 69,
 843         WLAN_EID_PERR = 70,
 844         /* 802.11h */
 845         WLAN_EID_PWR_CONSTRAINT = 32,
 846         WLAN_EID_PWR_CAPABILITY = 33,
 847         WLAN_EID_TPC_REQUEST = 34,
 848         WLAN_EID_TPC_REPORT = 35,
 849         WLAN_EID_SUPPORTED_CHANNELS = 36,
 850         WLAN_EID_CHANNEL_SWITCH = 37,
 851         WLAN_EID_MEASURE_REQUEST = 38,
 852         WLAN_EID_MEASURE_REPORT = 39,
 853         WLAN_EID_QUIET = 40,
 854         WLAN_EID_IBSS_DFS = 41,
 855         /* 802.11g */
 856         WLAN_EID_ERP_INFO = 42,
 857         WLAN_EID_EXT_SUPP_RATES = 50,
 858         /* 802.11n */
 859         WLAN_EID_HT_CAPABILITY = 45,
 860         WLAN_EID_HT_EXTRA_INFO = 61,
 861         /* 802.11i */
 862         WLAN_EID_RSN = 48,
 863         WLAN_EID_WPA = 221,
 864         WLAN_EID_GENERIC = 221,
 865         WLAN_EID_VENDOR_SPECIFIC = 221,
 866         WLAN_EID_QOS_PARAMETER = 222
 867 };
 868
 869 /* Action category code */
 870 enum ieee80211_category {
 871         WLAN_CATEGORY_SPECTRUM_MGMT = 0,
 872         WLAN_CATEGORY_QOS = 1,
 873         WLAN_CATEGORY_DLS = 2,
 874         WLAN_CATEGORY_BACK = 3,
 875         WLAN_CATEGORY_WMM = 17,
 876 };
 877
 878 /* BACK action code */
 879 enum ieee80211_back_actioncode {
 880         WLAN_ACTION_ADDBA_REQ = 0,
 881         WLAN_ACTION_ADDBA_RESP = 1,
 882         WLAN_ACTION_DELBA = 2,
 883 };
 884
 885 /* BACK (block-ack) parties */
 886 enum ieee80211_back_parties {
 887         WLAN_BACK_RECIPIENT = 0,
 888         WLAN_BACK_INITIATOR = 1,
 889         WLAN_BACK_TIMER = 2,
 890 };
 891
 892 /* A-MSDU 802.11n */
 893 #define IEEE80211_QOS_CONTROL_A_MSDU_PRESENT 0x0080
 894
 895 /* cipher suite selectors */
 896 #define WLAN_CIPHER_SUITE_USE_GROUP     0x000FAC00
 897 #define WLAN_CIPHER_SUITE_WEP40         0x000FAC01
 898 #define WLAN_CIPHER_SUITE_TKIP          0x000FAC02
 899 /* reserved:                            0x000FAC03 */
 900 #define WLAN_CIPHER_SUITE_CCMP          0x000FAC04
 901 #define WLAN_CIPHER_SUITE_WEP104        0x000FAC05
 902
 903 #define WLAN_MAX_KEY_LEN                32
 904
 905 /**
 906  * ieee80211_get_qos_ctl - get pointer to qos control bytes
 907  * @hdr: the frame
 908  *
 909  * The qos ctrl bytes come after the frame_control, duration, seq_num
 910  * and 3 or 4 addresses of length ETH_ALEN.
 911  * 3 addr: 2 + 2 + 2 + 3*6 = 24
 912  * 4 addr: 2 + 2 + 2 + 4*6 = 30
 913  */
 914 static inline u8 *ieee80211_get_qos_ctl(struct ieee80211_hdr *hdr)
 915 {
 916         if (ieee80211_has_a4(hdr->frame_control))
 917                 return (u8 *)hdr + 30;
 918         else
 919                 return (u8 *)hdr + 24;
 920 }
 921
 922 /**
 923  * ieee80211_get_SA - get pointer to SA
 924  * @hdr: the frame
 925  *
 926  * Given an 802.11 frame, this function returns the offset
 927  * to the source address (SA). It does not verify that the
 928  * header is long enough to contain the address, and the
 929  * header must be long enough to contain the frame control
 930  * field.
 931  */
 932 static inline u8 *ieee80211_get_SA(struct ieee80211_hdr *hdr)
 933 {
 934         if (ieee80211_has_a4(hdr->frame_control))
 935                 return hdr->addr4;
 936         if (ieee80211_has_fromds(hdr->frame_control))
 937                 return hdr->addr3;
 938         return hdr->addr2;
 939 }
 940
 941 /**
 942  * ieee80211_get_DA - get pointer to DA
 943  * @hdr: the frame
 944  *
 945  * Given an 802.11 frame, this function returns the offset
 946  * to the destination address (DA). It does not verify that
 947  * the header is long enough to contain the address, and the
 948  * header must be long enough to contain the frame control
 949  * field.
 950  */
 951 static inline u8 *ieee80211_get_DA(struct ieee80211_hdr *hdr)
 952 {
 953         if (ieee80211_has_tods(hdr->frame_control))
 954                 return hdr->addr3;
 955         else
 956                 return hdr->addr1;
 957 }
 958
 959 #endif /* IEEE80211_H */