err.no 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
 102 struct ieee80211_hdr {
 103         __le16 frame_control;
 104         __le16 duration_id;
 105         u8 addr1[6];
 106         u8 addr2[6];
 107         u8 addr3[6];
 108         __le16 seq_ctrl;
 109         u8 addr4[6];
 110 } __attribute__ ((packed));
 111
 112
 113 struct ieee80211s_hdr {
 114         u8 flags;
 115         u8 ttl;
 116         u8 seqnum[3];
 117         u8 eaddr1[6];
 118         u8 eaddr2[6];
 119         u8 eaddr3[6];
 120 } __attribute__ ((packed));
 121
 122
 123 struct ieee80211_mgmt {
 124         __le16 frame_control;
 125         __le16 duration;
 126         u8 da[6];
 127         u8 sa[6];
 128         u8 bssid[6];
 129         __le16 seq_ctrl;
 130         union {
 131                 struct {
 132                         __le16 auth_alg;
 133                         __le16 auth_transaction;
 134                         __le16 status_code;
 135                         /* possibly followed by Challenge text */
 136                         u8 variable[0];
 137                 } __attribute__ ((packed)) auth;
 138                 struct {
 139                         __le16 reason_code;
 140                 } __attribute__ ((packed)) deauth;
 141                 struct {
 142                         __le16 capab_info;
 143                         __le16 listen_interval;
 144                         /* followed by SSID and Supported rates */
 145                         u8 variable[0];
 146                 } __attribute__ ((packed)) assoc_req;
 147                 struct {
 148                         __le16 capab_info;
 149                         __le16 status_code;
 150                         __le16 aid;
 151                         /* followed by Supported rates */
 152                         u8 variable[0];
 153                 } __attribute__ ((packed)) assoc_resp, reassoc_resp;
 154                 struct {
 155                         __le16 capab_info;
 156                         __le16 listen_interval;
 157                         u8 current_ap[6];
 158                         /* followed by SSID and Supported rates */
 159                         u8 variable[0];
 160                 } __attribute__ ((packed)) reassoc_req;
 161                 struct {
 162                         __le16 reason_code;
 163                 } __attribute__ ((packed)) disassoc;
 164                 struct {
 165                         __le64 timestamp;
 166                         __le16 beacon_int;
 167                         __le16 capab_info;
 168                         /* followed by some of SSID, Supported rates,
 169                          * FH Params, DS Params, CF Params, IBSS Params, TIM */
 170                         u8 variable[0];
 171                 } __attribute__ ((packed)) beacon;
 172                 struct {
 173                         /* only variable items: SSID, Supported rates */
 174                         u8 variable[0];
 175                 } __attribute__ ((packed)) probe_req;
 176                 struct {
 177                         __le64 timestamp;
 178                         __le16 beacon_int;
 179                         __le16 capab_info;
 180                         /* followed by some of SSID, Supported rates,
 181                          * FH Params, DS Params, CF Params, IBSS Params */
 182                         u8 variable[0];
 183                 } __attribute__ ((packed)) probe_resp;
 184                 struct {
 185                         u8 category;
 186                         union {
 187                                 struct {
 188                                         u8 action_code;
 189                                         u8 dialog_token;
 190                                         u8 status_code;
 191                                         u8 variable[0];
 192                                 } __attribute__ ((packed)) wme_action;
 193                                 struct{
 194                                         u8 action_code;
 195                                         u8 element_id;
 196                                         u8 length;
 197                                         u8 switch_mode;
 198                                         u8 new_chan;
 199                                         u8 switch_count;
 200                                 } __attribute__((packed)) chan_switch;
 201                                 struct{
 202                                         u8 action_code;
 203                                         u8 dialog_token;
 204                                         __le16 capab;
 205                                         __le16 timeout;
 206                                         __le16 start_seq_num;
 207                                 } __attribute__((packed)) addba_req;
 208                                 struct{
 209                                         u8 action_code;
 210                                         u8 dialog_token;
 211                                         __le16 status;
 212                                         __le16 capab;
 213                                         __le16 timeout;
 214                                 } __attribute__((packed)) addba_resp;
 215                                 struct{
 216                                         u8 action_code;
 217                                         __le16 params;
 218                                         __le16 reason_code;
 219                                 } __attribute__((packed)) delba;
 220                                 struct{
 221                                         u8 action_code;
 222                                         /* capab_info for open and confirm,
 223                                          * reason for close
 224                                          */
 225                                         __le16 aux;
 226                                         /* Followed in plink_confirm by status
 227                                          * code, AID and supported rates,
 228                                          * and directly by supported rates in
 229                                          * plink_open and plink_close
 230                                          */
 231                                         u8 variable[0];
 232                                 } __attribute__((packed)) plink_action;
 233                                 struct{
 234                                         u8 action_code;
 235                                         u8 variable[0];
 236                                 } __attribute__((packed)) mesh_action;
 237                         } u;
 238                 } __attribute__ ((packed)) action;
 239         } u;
 240 } __attribute__ ((packed));
 241
 242
 243 /* Control frames */
 244 struct ieee80211_rts {
 245         __le16 frame_control;
 246         __le16 duration;
 247         u8 ra[6];
 248         u8 ta[6];
 249 } __attribute__ ((packed));
 250
 251 struct ieee80211_cts {
 252         __le16 frame_control;
 253         __le16 duration;
 254         u8 ra[6];
 255 } __attribute__ ((packed));
 256
 257 /**
 258  * struct ieee80211_bar - HT Block Ack Request
 259  *
 260  * This structure refers to "HT BlockAckReq" as
 261  * described in 802.11n draft section 7.2.1.7.1
 262  */
 263 struct ieee80211_bar {
 264         __le16 frame_control;
 265         __le16 duration;
 266         __u8 ra[6];
 267         __u8 ta[6];
 268         __le16 control;
 269         __le16 start_seq_num;
 270 } __attribute__((packed));
 271
 272 /**
 273  * struct ieee80211_ht_cap - HT capabilities
 274  *
 275  * This structure refers to "HT capabilities element" as
 276  * described in 802.11n draft section 7.3.2.52
 277  */
 278 struct ieee80211_ht_cap {
 279         __le16 cap_info;
 280         u8 ampdu_params_info;
 281         u8 supp_mcs_set[16];
 282         __le16 extended_ht_cap_info;
 283         __le32 tx_BF_cap_info;
 284         u8 antenna_selection_info;
 285 } __attribute__ ((packed));
 286
 287 /**
 288  * struct ieee80211_ht_cap - HT additional information
 289  *
 290  * This structure refers to "HT information element" as
 291  * described in 802.11n draft section 7.3.2.53
 292  */
 293 struct ieee80211_ht_addt_info {
 294         u8 control_chan;
 295         u8 ht_param;
 296         __le16 operation_mode;
 297         __le16 stbc_param;
 298         u8 basic_set[16];
 299 } __attribute__ ((packed));
 300
 301 /* 802.11n HT capabilities masks */
 302 #define IEEE80211_HT_CAP_SUP_WIDTH              0x0002
 303 #define IEEE80211_HT_CAP_MIMO_PS                0x000C
 304 #define IEEE80211_HT_CAP_GRN_FLD                0x0010
 305 #define IEEE80211_HT_CAP_SGI_20                 0x0020
 306 #define IEEE80211_HT_CAP_SGI_40                 0x0040
 307 #define IEEE80211_HT_CAP_DELAY_BA               0x0400
 308 #define IEEE80211_HT_CAP_MAX_AMSDU              0x0800
 309 #define IEEE80211_HT_CAP_AMPDU_FACTOR           0x03
 310 #define IEEE80211_HT_CAP_AMPDU_DENSITY          0x1C
 311 /* 802.11n HT IE masks */
 312 #define IEEE80211_HT_IE_CHA_SEC_OFFSET          0x03
 313 #define IEEE80211_HT_IE_CHA_WIDTH               0x04
 314 #define IEEE80211_HT_IE_HT_PROTECTION           0x0003
 315 #define IEEE80211_HT_IE_NON_GF_STA_PRSNT        0x0004
 316 #define IEEE80211_HT_IE_NON_HT_STA_PRSNT        0x0010
 317
 318 /* MIMO Power Save Modes */
 319 #define WLAN_HT_CAP_MIMO_PS_STATIC         0
 320 #define WLAN_HT_CAP_MIMO_PS_DYNAMIC        1
 321 #define WLAN_HT_CAP_MIMO_PS_INVALID        2
 322 #define WLAN_HT_CAP_MIMO_PS_DISABLED       3
 323
 324 /* Authentication algorithms */
 325 #define WLAN_AUTH_OPEN 0
 326 #define WLAN_AUTH_SHARED_KEY 1
 327 #define WLAN_AUTH_FAST_BSS_TRANSITION 2
 328 #define WLAN_AUTH_LEAP 128
 329
 330 #define WLAN_AUTH_CHALLENGE_LEN 128
 331
 332 #define WLAN_CAPABILITY_ESS             (1<<0)
 333 #define WLAN_CAPABILITY_IBSS            (1<<1)
 334 #define WLAN_CAPABILITY_CF_POLLABLE     (1<<2)
 335 #define WLAN_CAPABILITY_CF_POLL_REQUEST (1<<3)
 336 #define WLAN_CAPABILITY_PRIVACY         (1<<4)
 337 #define WLAN_CAPABILITY_SHORT_PREAMBLE  (1<<5)
 338 #define WLAN_CAPABILITY_PBCC            (1<<6)
 339 #define WLAN_CAPABILITY_CHANNEL_AGILITY (1<<7)
 340 /* 802.11h */
 341 #define WLAN_CAPABILITY_SPECTRUM_MGMT   (1<<8)
 342 #define WLAN_CAPABILITY_QOS             (1<<9)
 343 #define WLAN_CAPABILITY_SHORT_SLOT_TIME (1<<10)
 344 #define WLAN_CAPABILITY_DSSS_OFDM       (1<<13)
 345
 346 /* 802.11g ERP information element */
 347 #define WLAN_ERP_NON_ERP_PRESENT (1<<0)
 348 #define WLAN_ERP_USE_PROTECTION (1<<1)
 349 #define WLAN_ERP_BARKER_PREAMBLE (1<<2)
 350
 351 /* WLAN_ERP_BARKER_PREAMBLE values */
 352 enum {
 353         WLAN_ERP_PREAMBLE_SHORT = 0,
 354         WLAN_ERP_PREAMBLE_LONG = 1,
 355 };
 356
 357 /* Status codes */
 358 enum ieee80211_statuscode {
 359         WLAN_STATUS_SUCCESS = 0,
 360         WLAN_STATUS_UNSPECIFIED_FAILURE = 1,
 361         WLAN_STATUS_CAPS_UNSUPPORTED = 10,
 362         WLAN_STATUS_REASSOC_NO_ASSOC = 11,
 363         WLAN_STATUS_ASSOC_DENIED_UNSPEC = 12,
 364         WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG = 13,
 365         WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION = 14,
 366         WLAN_STATUS_CHALLENGE_FAIL = 15,
 367         WLAN_STATUS_AUTH_TIMEOUT = 16,
 368         WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA = 17,
 369         WLAN_STATUS_ASSOC_DENIED_RATES = 18,
 370         /* 802.11b */
 371         WLAN_STATUS_ASSOC_DENIED_NOSHORTPREAMBLE = 19,
 372         WLAN_STATUS_ASSOC_DENIED_NOPBCC = 20,
 373         WLAN_STATUS_ASSOC_DENIED_NOAGILITY = 21,
 374         /* 802.11h */
 375         WLAN_STATUS_ASSOC_DENIED_NOSPECTRUM = 22,
 376         WLAN_STATUS_ASSOC_REJECTED_BAD_POWER = 23,
 377         WLAN_STATUS_ASSOC_REJECTED_BAD_SUPP_CHAN = 24,
 378         /* 802.11g */
 379         WLAN_STATUS_ASSOC_DENIED_NOSHORTTIME = 25,
 380         WLAN_STATUS_ASSOC_DENIED_NODSSSOFDM = 26,
 381         /* 802.11i */
 382         WLAN_STATUS_INVALID_IE = 40,
 383         WLAN_STATUS_INVALID_GROUP_CIPHER = 41,
 384         WLAN_STATUS_INVALID_PAIRWISE_CIPHER = 42,
 385         WLAN_STATUS_INVALID_AKMP = 43,
 386         WLAN_STATUS_UNSUPP_RSN_VERSION = 44,
 387         WLAN_STATUS_INVALID_RSN_IE_CAP = 45,
 388         WLAN_STATUS_CIPHER_SUITE_REJECTED = 46,
 389         /* 802.11e */
 390         WLAN_STATUS_UNSPECIFIED_QOS = 32,
 391         WLAN_STATUS_ASSOC_DENIED_NOBANDWIDTH = 33,
 392         WLAN_STATUS_ASSOC_DENIED_LOWACK = 34,
 393         WLAN_STATUS_ASSOC_DENIED_UNSUPP_QOS = 35,
 394         WLAN_STATUS_REQUEST_DECLINED = 37,
 395         WLAN_STATUS_INVALID_QOS_PARAM = 38,
 396         WLAN_STATUS_CHANGE_TSPEC = 39,
 397         WLAN_STATUS_WAIT_TS_DELAY = 47,
 398         WLAN_STATUS_NO_DIRECT_LINK = 48,
 399         WLAN_STATUS_STA_NOT_PRESENT = 49,
 400         WLAN_STATUS_STA_NOT_QSTA = 50,
 401 };
 402
 403
 404 /* Reason codes */
 405 enum ieee80211_reasoncode {
 406         WLAN_REASON_UNSPECIFIED = 1,
 407         WLAN_REASON_PREV_AUTH_NOT_VALID = 2,
 408         WLAN_REASON_DEAUTH_LEAVING = 3,
 409         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY = 4,
 410         WLAN_REASON_DISASSOC_AP_BUSY = 5,
 411         WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA = 6,
 412         WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA = 7,
 413         WLAN_REASON_DISASSOC_STA_HAS_LEFT = 8,
 414         WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH = 9,
 415         /* 802.11h */
 416         WLAN_REASON_DISASSOC_BAD_POWER = 10,
 417         WLAN_REASON_DISASSOC_BAD_SUPP_CHAN = 11,
 418         /* 802.11i */
 419         WLAN_REASON_INVALID_IE = 13,
 420         WLAN_REASON_MIC_FAILURE = 14,
 421         WLAN_REASON_4WAY_HANDSHAKE_TIMEOUT = 15,
 422         WLAN_REASON_GROUP_KEY_HANDSHAKE_TIMEOUT = 16,
 423         WLAN_REASON_IE_DIFFERENT = 17,
 424         WLAN_REASON_INVALID_GROUP_CIPHER = 18,
 425         WLAN_REASON_INVALID_PAIRWISE_CIPHER = 19,
 426         WLAN_REASON_INVALID_AKMP = 20,
 427         WLAN_REASON_UNSUPP_RSN_VERSION = 21,
 428         WLAN_REASON_INVALID_RSN_IE_CAP = 22,
 429         WLAN_REASON_IEEE8021X_FAILED = 23,
 430         WLAN_REASON_CIPHER_SUITE_REJECTED = 24,
 431         /* 802.11e */
 432         WLAN_REASON_DISASSOC_UNSPECIFIED_QOS = 32,
 433         WLAN_REASON_DISASSOC_QAP_NO_BANDWIDTH = 33,
 434         WLAN_REASON_DISASSOC_LOW_ACK = 34,
 435         WLAN_REASON_DISASSOC_QAP_EXCEED_TXOP = 35,
 436         WLAN_REASON_QSTA_LEAVE_QBSS = 36,
 437         WLAN_REASON_QSTA_NOT_USE = 37,
 438         WLAN_REASON_QSTA_REQUIRE_SETUP = 38,
 439         WLAN_REASON_QSTA_TIMEOUT = 39,
 440         WLAN_REASON_QSTA_CIPHER_NOT_SUPP = 45,
 441 };
 442
 443
 444 /* Information Element IDs */
 445 enum ieee80211_eid {
 446         WLAN_EID_SSID = 0,
 447         WLAN_EID_SUPP_RATES = 1,
 448         WLAN_EID_FH_PARAMS = 2,
 449         WLAN_EID_DS_PARAMS = 3,
 450         WLAN_EID_CF_PARAMS = 4,
 451         WLAN_EID_TIM = 5,
 452         WLAN_EID_IBSS_PARAMS = 6,
 453         WLAN_EID_CHALLENGE = 16,
 454         /* 802.11d */
 455         WLAN_EID_COUNTRY = 7,
 456         WLAN_EID_HP_PARAMS = 8,
 457         WLAN_EID_HP_TABLE = 9,
 458         WLAN_EID_REQUEST = 10,
 459         /* 802.11e */
 460         WLAN_EID_QBSS_LOAD = 11,
 461         WLAN_EID_EDCA_PARAM_SET = 12,
 462         WLAN_EID_TSPEC = 13,
 463         WLAN_EID_TCLAS = 14,
 464         WLAN_EID_SCHEDULE = 15,
 465         WLAN_EID_TS_DELAY = 43,
 466         WLAN_EID_TCLAS_PROCESSING = 44,
 467         WLAN_EID_QOS_CAPA = 46,
 468         /* 802.11s */
 469         WLAN_EID_MESH_CONFIG = 36,      /* Pending IEEE 802.11 ANA approval */
 470         WLAN_EID_MESH_ID = 37,          /* Pending IEEE 802.11 ANA approval */
 471         WLAN_EID_PEER_LINK = 40,        /* Pending IEEE 802.11 ANA approval */
 472         WLAN_EID_PREQ = 53,             /* Pending IEEE 802.11 ANA approval */
 473         WLAN_EID_PREP = 54,             /* Pending IEEE 802.11 ANA approval */
 474         WLAN_EID_PERR = 55,             /* Pending IEEE 802.11 ANA approval */
 475         /* 802.11h */
 476         WLAN_EID_PWR_CONSTRAINT = 32,
 477         WLAN_EID_PWR_CAPABILITY = 33,
 478         WLAN_EID_TPC_REQUEST = 34,
 479         WLAN_EID_TPC_REPORT = 35,
 480         WLAN_EID_SUPPORTED_CHANNELS = 36,
 481         WLAN_EID_CHANNEL_SWITCH = 37,
 482         WLAN_EID_MEASURE_REQUEST = 38,
 483         WLAN_EID_MEASURE_REPORT = 39,
 484         WLAN_EID_QUIET = 40,
 485         WLAN_EID_IBSS_DFS = 41,
 486         /* 802.11g */
 487         WLAN_EID_ERP_INFO = 42,
 488         WLAN_EID_EXT_SUPP_RATES = 50,
 489         /* 802.11n */
 490         WLAN_EID_HT_CAPABILITY = 45,
 491         WLAN_EID_HT_EXTRA_INFO = 61,
 492         /* 802.11i */
 493         WLAN_EID_RSN = 48,
 494         WLAN_EID_WPA = 221,
 495         WLAN_EID_GENERIC = 221,
 496         WLAN_EID_VENDOR_SPECIFIC = 221,
 497         WLAN_EID_QOS_PARAMETER = 222
 498 };
 499
 500 /* Action category code */
 501 enum ieee80211_category {
 502         WLAN_CATEGORY_SPECTRUM_MGMT = 0,
 503         WLAN_CATEGORY_QOS = 1,
 504         WLAN_CATEGORY_DLS = 2,
 505         WLAN_CATEGORY_BACK = 3,
 506         WLAN_CATEGORY_WMM = 17,
 507 };
 508
 509 /* BACK action code */
 510 enum ieee80211_back_actioncode {
 511         WLAN_ACTION_ADDBA_REQ = 0,
 512         WLAN_ACTION_ADDBA_RESP = 1,
 513         WLAN_ACTION_DELBA = 2,
 514 };
 515
 516 /* BACK (block-ack) parties */
 517 enum ieee80211_back_parties {
 518         WLAN_BACK_RECIPIENT = 0,
 519         WLAN_BACK_INITIATOR = 1,
 520         WLAN_BACK_TIMER = 2,
 521 };
 522
 523 /* A-MSDU 802.11n */
 524 #define IEEE80211_QOS_CONTROL_A_MSDU_PRESENT 0x0080
 525
 526 /* cipher suite selectors */
 527 #define WLAN_CIPHER_SUITE_USE_GROUP     0x000FAC00
 528 #define WLAN_CIPHER_SUITE_WEP40         0x000FAC01
 529 #define WLAN_CIPHER_SUITE_TKIP          0x000FAC02
 530 /* reserved:                            0x000FAC03 */
 531 #define WLAN_CIPHER_SUITE_CCMP          0x000FAC04
 532 #define WLAN_CIPHER_SUITE_WEP104        0x000FAC05
 533
 534 #define WLAN_MAX_KEY_LEN                32
 535
 536 /**
 537  * ieee80211_get_SA - get pointer to SA
 538  *
 539  * Given an 802.11 frame, this function returns the offset
 540  * to the source address (SA). It does not verify that the
 541  * header is long enough to contain the address, and the
 542  * header must be long enough to contain the frame control
 543  * field.
 544  *
 545  * @hdr: the frame
 546  */
 547 static inline u8 *ieee80211_get_SA(struct ieee80211_hdr *hdr)
 548 {
 549         u8 *raw = (u8 *) hdr;
 550         u8 tofrom = (*(raw+1)) & 3; /* get the TODS and FROMDS bits */
 551
 552         switch (tofrom) {
 553                 case 2:
 554                         return hdr->addr3;
 555                 case 3:
 556                         return hdr->addr4;
 557         }
 558         return hdr->addr2;
 559 }
 560
 561 /**
 562  * ieee80211_get_DA - get pointer to DA
 563  *
 564  * Given an 802.11 frame, this function returns the offset
 565  * to the destination address (DA). It does not verify that
 566  * the header is long enough to contain the address, and the
 567  * header must be long enough to contain the frame control
 568  * field.
 569  *
 570  * @hdr: the frame
 571  */
 572 static inline u8 *ieee80211_get_DA(struct ieee80211_hdr *hdr)
 573 {
 574         u8 *raw = (u8 *) hdr;
 575         u8 to_ds = (*(raw+1)) & 1; /* get the TODS bit */
 576
 577         if (to_ds)
 578                 return hdr->addr3;
 579         return hdr->addr1;
 580 }
 581
 582 /**
 583  * ieee80211_get_morefrag - determine whether the MOREFRAGS bit is set
 584  *
 585  * This function determines whether the "more fragments" bit is set
 586  * in the frame.
 587  *
 588  * @hdr: the frame
 589  */
 590 static inline int ieee80211_get_morefrag(struct ieee80211_hdr *hdr)
 591 {
 592         return (le16_to_cpu(hdr->frame_control) &
 593                 IEEE80211_FCTL_MOREFRAGS) != 0;
 594 }
 595
 596 #endif /* IEEE80211_H */