Pileus Git - ~andy/linux/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_quiet_ie
 474  *
 475  * This structure refers to "Quiet information element"
 476  */
 477 struct ieee80211_quiet_ie {
 478         u8 count;
 479         u8 period;
 480         __le16 duration;
 481         __le16 offset;
 482 } __attribute__ ((packed));
 483
 484 /**
 485  * struct ieee80211_msrment_ie
 486  *
 487  * This structure refers to "Measurement Request/Report information element"
 488  */
 489 struct ieee80211_msrment_ie {
 490         u8 token;
 491         u8 mode;
 492         u8 type;
 493         u8 request[0];
 494 } __attribute__ ((packed));
 495
 496 /**
 497  * struct ieee80211_channel_sw_ie
 498  *
 499  * This structure refers to "Channel Switch Announcement information element"
 500  */
 501 struct ieee80211_channel_sw_ie {
 502         u8 mode;
 503         u8 new_ch_num;
 504         u8 count;
 505 } __attribute__ ((packed));
 506
 507 struct ieee80211_mgmt {
 508         __le16 frame_control;
 509         __le16 duration;
 510         u8 da[6];
 511         u8 sa[6];
 512         u8 bssid[6];
 513         __le16 seq_ctrl;
 514         union {
 515                 struct {
 516                         __le16 auth_alg;
 517                         __le16 auth_transaction;
 518                         __le16 status_code;
 519                         /* possibly followed by Challenge text */
 520                         u8 variable[0];
 521                 } __attribute__ ((packed)) auth;
 522                 struct {
 523                         __le16 reason_code;
 524                 } __attribute__ ((packed)) deauth;
 525                 struct {
 526                         __le16 capab_info;
 527                         __le16 listen_interval;
 528                         /* followed by SSID and Supported rates */
 529                         u8 variable[0];
 530                 } __attribute__ ((packed)) assoc_req;
 531                 struct {
 532                         __le16 capab_info;
 533                         __le16 status_code;
 534                         __le16 aid;
 535                         /* followed by Supported rates */
 536                         u8 variable[0];
 537                 } __attribute__ ((packed)) assoc_resp, reassoc_resp;
 538                 struct {
 539                         __le16 capab_info;
 540                         __le16 listen_interval;
 541                         u8 current_ap[6];
 542                         /* followed by SSID and Supported rates */
 543                         u8 variable[0];
 544                 } __attribute__ ((packed)) reassoc_req;
 545                 struct {
 546                         __le16 reason_code;
 547                 } __attribute__ ((packed)) disassoc;
 548                 struct {
 549                         __le64 timestamp;
 550                         __le16 beacon_int;
 551                         __le16 capab_info;
 552                         /* followed by some of SSID, Supported rates,
 553                          * FH Params, DS Params, CF Params, IBSS Params, TIM */
 554                         u8 variable[0];
 555                 } __attribute__ ((packed)) beacon;
 556                 struct {
 557                         /* only variable items: SSID, Supported rates */
 558                         u8 variable[0];
 559                 } __attribute__ ((packed)) probe_req;
 560                 struct {
 561                         __le64 timestamp;
 562                         __le16 beacon_int;
 563                         __le16 capab_info;
 564                         /* followed by some of SSID, Supported rates,
 565                          * FH Params, DS Params, CF Params, IBSS Params */
 566                         u8 variable[0];
 567                 } __attribute__ ((packed)) probe_resp;
 568                 struct {
 569                         u8 category;
 570                         union {
 571                                 struct {
 572                                         u8 action_code;
 573                                         u8 dialog_token;
 574                                         u8 status_code;
 575                                         u8 variable[0];
 576                                 } __attribute__ ((packed)) wme_action;
 577                                 struct{
 578                                         u8 action_code;
 579                                         u8 element_id;
 580                                         u8 length;
 581                                         struct ieee80211_channel_sw_ie sw_elem;
 582                                 } __attribute__((packed)) chan_switch;
 583                                 struct{
 584                                         u8 action_code;
 585                                         u8 dialog_token;
 586                                         u8 element_id;
 587                                         u8 length;
 588                                         struct ieee80211_msrment_ie msr_elem;
 589                                 } __attribute__((packed)) measurement;
 590                                 struct{
 591                                         u8 action_code;
 592                                         u8 dialog_token;
 593                                         __le16 capab;
 594                                         __le16 timeout;
 595                                         __le16 start_seq_num;
 596                                 } __attribute__((packed)) addba_req;
 597                                 struct{
 598                                         u8 action_code;
 599                                         u8 dialog_token;
 600                                         __le16 status;
 601                                         __le16 capab;
 602                                         __le16 timeout;
 603                                 } __attribute__((packed)) addba_resp;
 604                                 struct{
 605                                         u8 action_code;
 606                                         __le16 params;
 607                                         __le16 reason_code;
 608                                 } __attribute__((packed)) delba;
 609                                 struct{
 610                                         u8 action_code;
 611                                         /* capab_info for open and confirm,
 612                                          * reason for close
 613                                          */
 614                                         __le16 aux;
 615                                         /* Followed in plink_confirm by status
 616                                          * code, AID and supported rates,
 617                                          * and directly by supported rates in
 618                                          * plink_open and plink_close
 619                                          */
 620                                         u8 variable[0];
 621                                 } __attribute__((packed)) plink_action;
 622                                 struct{
 623                                         u8 action_code;
 624                                         u8 variable[0];
 625                                 } __attribute__((packed)) mesh_action;
 626                         } u;
 627                 } __attribute__ ((packed)) action;
 628         } u;
 629 } __attribute__ ((packed));
 630
 631
 632 /* Control frames */
 633 struct ieee80211_rts {
 634         __le16 frame_control;
 635         __le16 duration;
 636         u8 ra[6];
 637         u8 ta[6];
 638 } __attribute__ ((packed));
 639
 640 struct ieee80211_cts {
 641         __le16 frame_control;
 642         __le16 duration;
 643         u8 ra[6];
 644 } __attribute__ ((packed));
 645
 646 /**
 647  * struct ieee80211_bar - HT Block Ack Request
 648  *
 649  * This structure refers to "HT BlockAckReq" as
 650  * described in 802.11n draft section 7.2.1.7.1
 651  */
 652 struct ieee80211_bar {
 653         __le16 frame_control;
 654         __le16 duration;
 655         __u8 ra[6];
 656         __u8 ta[6];
 657         __le16 control;
 658         __le16 start_seq_num;
 659 } __attribute__((packed));
 660
 661 /**
 662  * struct ieee80211_ht_cap - HT capabilities
 663  *
 664  * This structure refers to "HT capabilities element" as
 665  * described in 802.11n draft section 7.3.2.52
 666  */
 667 struct ieee80211_ht_cap {
 668         __le16 cap_info;
 669         u8 ampdu_params_info;
 670         u8 supp_mcs_set[16];
 671         __le16 extended_ht_cap_info;
 672         __le32 tx_BF_cap_info;
 673         u8 antenna_selection_info;
 674 } __attribute__ ((packed));
 675
 676 /**
 677  * struct ieee80211_ht_cap - HT additional information
 678  *
 679  * This structure refers to "HT information element" as
 680  * described in 802.11n draft section 7.3.2.53
 681  */
 682 struct ieee80211_ht_addt_info {
 683         u8 control_chan;
 684         u8 ht_param;
 685         __le16 operation_mode;
 686         __le16 stbc_param;
 687         u8 basic_set[16];
 688 } __attribute__ ((packed));
 689
 690 /* 802.11n HT capabilities masks */
 691 #define IEEE80211_HT_CAP_SUP_WIDTH              0x0002
 692 #define IEEE80211_HT_CAP_MIMO_PS                0x000C
 693 #define IEEE80211_HT_CAP_GRN_FLD                0x0010
 694 #define IEEE80211_HT_CAP_SGI_20                 0x0020
 695 #define IEEE80211_HT_CAP_SGI_40                 0x0040
 696 #define IEEE80211_HT_CAP_DELAY_BA               0x0400
 697 #define IEEE80211_HT_CAP_MAX_AMSDU              0x0800
 698 /* 802.11n HT capability AMPDU settings */
 699 #define IEEE80211_HT_CAP_AMPDU_FACTOR           0x03
 700 #define IEEE80211_HT_CAP_AMPDU_DENSITY          0x1C
 701 /* 802.11n HT capability MSC set */
 702 #define IEEE80211_SUPP_MCS_SET_UEQM             4
 703 #define IEEE80211_HT_CAP_MAX_STREAMS            4
 704 #define IEEE80211_SUPP_MCS_SET_LEN              10
 705 /* maximum streams the spec allows */
 706 #define IEEE80211_HT_CAP_MCS_TX_DEFINED         0x01
 707 #define IEEE80211_HT_CAP_MCS_TX_RX_DIFF         0x02
 708 #define IEEE80211_HT_CAP_MCS_TX_STREAMS         0x0C
 709 #define IEEE80211_HT_CAP_MCS_TX_UEQM            0x10
 710 /* 802.11n HT IE masks */
 711 #define IEEE80211_HT_IE_CHA_SEC_OFFSET          0x03
 712 #define IEEE80211_HT_IE_CHA_SEC_NONE            0x00
 713 #define IEEE80211_HT_IE_CHA_SEC_ABOVE           0x01
 714 #define IEEE80211_HT_IE_CHA_SEC_BELOW           0x03
 715 #define IEEE80211_HT_IE_CHA_WIDTH               0x04
 716 #define IEEE80211_HT_IE_HT_PROTECTION           0x0003
 717 #define IEEE80211_HT_IE_NON_GF_STA_PRSNT        0x0004
 718 #define IEEE80211_HT_IE_NON_HT_STA_PRSNT        0x0010
 719
 720 /* MIMO Power Save Modes */
 721 #define WLAN_HT_CAP_MIMO_PS_STATIC      0
 722 #define WLAN_HT_CAP_MIMO_PS_DYNAMIC     1
 723 #define WLAN_HT_CAP_MIMO_PS_INVALID     2
 724 #define WLAN_HT_CAP_MIMO_PS_DISABLED    3
 725
 726 /* Authentication algorithms */
 727 #define WLAN_AUTH_OPEN 0
 728 #define WLAN_AUTH_SHARED_KEY 1
 729 #define WLAN_AUTH_FAST_BSS_TRANSITION 2
 730 #define WLAN_AUTH_LEAP 128
 731
 732 #define WLAN_AUTH_CHALLENGE_LEN 128
 733
 734 #define WLAN_CAPABILITY_ESS             (1<<0)
 735 #define WLAN_CAPABILITY_IBSS            (1<<1)
 736 #define WLAN_CAPABILITY_CF_POLLABLE     (1<<2)
 737 #define WLAN_CAPABILITY_CF_POLL_REQUEST (1<<3)
 738 #define WLAN_CAPABILITY_PRIVACY         (1<<4)
 739 #define WLAN_CAPABILITY_SHORT_PREAMBLE  (1<<5)
 740 #define WLAN_CAPABILITY_PBCC            (1<<6)
 741 #define WLAN_CAPABILITY_CHANNEL_AGILITY (1<<7)
 742 /* 802.11h */
 743 #define WLAN_CAPABILITY_SPECTRUM_MGMT   (1<<8)
 744 #define WLAN_CAPABILITY_QOS             (1<<9)
 745 #define WLAN_CAPABILITY_SHORT_SLOT_TIME (1<<10)
 746 #define WLAN_CAPABILITY_DSSS_OFDM       (1<<13)
 747
 748 /* 802.11g ERP information element */
 749 #define WLAN_ERP_NON_ERP_PRESENT (1<<0)
 750 #define WLAN_ERP_USE_PROTECTION (1<<1)
 751 #define WLAN_ERP_BARKER_PREAMBLE (1<<2)
 752
 753 /* WLAN_ERP_BARKER_PREAMBLE values */
 754 enum {
 755         WLAN_ERP_PREAMBLE_SHORT = 0,
 756         WLAN_ERP_PREAMBLE_LONG = 1,
 757 };
 758
 759 /* Status codes */
 760 enum ieee80211_statuscode {
 761         WLAN_STATUS_SUCCESS = 0,
 762         WLAN_STATUS_UNSPECIFIED_FAILURE = 1,
 763         WLAN_STATUS_CAPS_UNSUPPORTED = 10,
 764         WLAN_STATUS_REASSOC_NO_ASSOC = 11,
 765         WLAN_STATUS_ASSOC_DENIED_UNSPEC = 12,
 766         WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG = 13,
 767         WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION = 14,
 768         WLAN_STATUS_CHALLENGE_FAIL = 15,
 769         WLAN_STATUS_AUTH_TIMEOUT = 16,
 770         WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA = 17,
 771         WLAN_STATUS_ASSOC_DENIED_RATES = 18,
 772         /* 802.11b */
 773         WLAN_STATUS_ASSOC_DENIED_NOSHORTPREAMBLE = 19,
 774         WLAN_STATUS_ASSOC_DENIED_NOPBCC = 20,
 775         WLAN_STATUS_ASSOC_DENIED_NOAGILITY = 21,
 776         /* 802.11h */
 777         WLAN_STATUS_ASSOC_DENIED_NOSPECTRUM = 22,
 778         WLAN_STATUS_ASSOC_REJECTED_BAD_POWER = 23,
 779         WLAN_STATUS_ASSOC_REJECTED_BAD_SUPP_CHAN = 24,
 780         /* 802.11g */
 781         WLAN_STATUS_ASSOC_DENIED_NOSHORTTIME = 25,
 782         WLAN_STATUS_ASSOC_DENIED_NODSSSOFDM = 26,
 783         /* 802.11i */
 784         WLAN_STATUS_INVALID_IE = 40,
 785         WLAN_STATUS_INVALID_GROUP_CIPHER = 41,
 786         WLAN_STATUS_INVALID_PAIRWISE_CIPHER = 42,
 787         WLAN_STATUS_INVALID_AKMP = 43,
 788         WLAN_STATUS_UNSUPP_RSN_VERSION = 44,
 789         WLAN_STATUS_INVALID_RSN_IE_CAP = 45,
 790         WLAN_STATUS_CIPHER_SUITE_REJECTED = 46,
 791         /* 802.11e */
 792         WLAN_STATUS_UNSPECIFIED_QOS = 32,
 793         WLAN_STATUS_ASSOC_DENIED_NOBANDWIDTH = 33,
 794         WLAN_STATUS_ASSOC_DENIED_LOWACK = 34,
 795         WLAN_STATUS_ASSOC_DENIED_UNSUPP_QOS = 35,
 796         WLAN_STATUS_REQUEST_DECLINED = 37,
 797         WLAN_STATUS_INVALID_QOS_PARAM = 38,
 798         WLAN_STATUS_CHANGE_TSPEC = 39,
 799         WLAN_STATUS_WAIT_TS_DELAY = 47,
 800         WLAN_STATUS_NO_DIRECT_LINK = 48,
 801         WLAN_STATUS_STA_NOT_PRESENT = 49,
 802         WLAN_STATUS_STA_NOT_QSTA = 50,
 803 };
 804
 805
 806 /* Reason codes */
 807 enum ieee80211_reasoncode {
 808         WLAN_REASON_UNSPECIFIED = 1,
 809         WLAN_REASON_PREV_AUTH_NOT_VALID = 2,
 810         WLAN_REASON_DEAUTH_LEAVING = 3,
 811         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY = 4,
 812         WLAN_REASON_DISASSOC_AP_BUSY = 5,
 813         WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA = 6,
 814         WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA = 7,
 815         WLAN_REASON_DISASSOC_STA_HAS_LEFT = 8,
 816         WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH = 9,
 817         /* 802.11h */
 818         WLAN_REASON_DISASSOC_BAD_POWER = 10,
 819         WLAN_REASON_DISASSOC_BAD_SUPP_CHAN = 11,
 820         /* 802.11i */
 821         WLAN_REASON_INVALID_IE = 13,
 822         WLAN_REASON_MIC_FAILURE = 14,
 823         WLAN_REASON_4WAY_HANDSHAKE_TIMEOUT = 15,
 824         WLAN_REASON_GROUP_KEY_HANDSHAKE_TIMEOUT = 16,
 825         WLAN_REASON_IE_DIFFERENT = 17,
 826         WLAN_REASON_INVALID_GROUP_CIPHER = 18,
 827         WLAN_REASON_INVALID_PAIRWISE_CIPHER = 19,
 828         WLAN_REASON_INVALID_AKMP = 20,
 829         WLAN_REASON_UNSUPP_RSN_VERSION = 21,
 830         WLAN_REASON_INVALID_RSN_IE_CAP = 22,
 831         WLAN_REASON_IEEE8021X_FAILED = 23,
 832         WLAN_REASON_CIPHER_SUITE_REJECTED = 24,
 833         /* 802.11e */
 834         WLAN_REASON_DISASSOC_UNSPECIFIED_QOS = 32,
 835         WLAN_REASON_DISASSOC_QAP_NO_BANDWIDTH = 33,
 836         WLAN_REASON_DISASSOC_LOW_ACK = 34,
 837         WLAN_REASON_DISASSOC_QAP_EXCEED_TXOP = 35,
 838         WLAN_REASON_QSTA_LEAVE_QBSS = 36,
 839         WLAN_REASON_QSTA_NOT_USE = 37,
 840         WLAN_REASON_QSTA_REQUIRE_SETUP = 38,
 841         WLAN_REASON_QSTA_TIMEOUT = 39,
 842         WLAN_REASON_QSTA_CIPHER_NOT_SUPP = 45,
 843 };
 844
 845
 846 /* Information Element IDs */
 847 enum ieee80211_eid {
 848         WLAN_EID_SSID = 0,
 849         WLAN_EID_SUPP_RATES = 1,
 850         WLAN_EID_FH_PARAMS = 2,
 851         WLAN_EID_DS_PARAMS = 3,
 852         WLAN_EID_CF_PARAMS = 4,
 853         WLAN_EID_TIM = 5,
 854         WLAN_EID_IBSS_PARAMS = 6,
 855         WLAN_EID_CHALLENGE = 16,
 856         /* 802.11d */
 857         WLAN_EID_COUNTRY = 7,
 858         WLAN_EID_HP_PARAMS = 8,
 859         WLAN_EID_HP_TABLE = 9,
 860         WLAN_EID_REQUEST = 10,
 861         /* 802.11e */
 862         WLAN_EID_QBSS_LOAD = 11,
 863         WLAN_EID_EDCA_PARAM_SET = 12,
 864         WLAN_EID_TSPEC = 13,
 865         WLAN_EID_TCLAS = 14,
 866         WLAN_EID_SCHEDULE = 15,
 867         WLAN_EID_TS_DELAY = 43,
 868         WLAN_EID_TCLAS_PROCESSING = 44,
 869         WLAN_EID_QOS_CAPA = 46,
 870         /* 802.11s
 871          *
 872          * All mesh EID numbers are pending IEEE 802.11 ANA approval.
 873          * The numbers have been incremented from those suggested in
 874          * 802.11s/D2.0 so that MESH_CONFIG does not conflict with
 875          * EXT_SUPP_RATES.
 876          */
 877         WLAN_EID_MESH_CONFIG = 51,
 878         WLAN_EID_MESH_ID = 52,
 879         WLAN_EID_PEER_LINK = 55,
 880         WLAN_EID_PREQ = 68,
 881         WLAN_EID_PREP = 69,
 882         WLAN_EID_PERR = 70,
 883         /* 802.11h */
 884         WLAN_EID_PWR_CONSTRAINT = 32,
 885         WLAN_EID_PWR_CAPABILITY = 33,
 886         WLAN_EID_TPC_REQUEST = 34,
 887         WLAN_EID_TPC_REPORT = 35,
 888         WLAN_EID_SUPPORTED_CHANNELS = 36,
 889         WLAN_EID_CHANNEL_SWITCH = 37,
 890         WLAN_EID_MEASURE_REQUEST = 38,
 891         WLAN_EID_MEASURE_REPORT = 39,
 892         WLAN_EID_QUIET = 40,
 893         WLAN_EID_IBSS_DFS = 41,
 894         /* 802.11g */
 895         WLAN_EID_ERP_INFO = 42,
 896         WLAN_EID_EXT_SUPP_RATES = 50,
 897         /* 802.11n */
 898         WLAN_EID_HT_CAPABILITY = 45,
 899         WLAN_EID_HT_EXTRA_INFO = 61,
 900         /* 802.11i */
 901         WLAN_EID_RSN = 48,
 902         WLAN_EID_WPA = 221,
 903         WLAN_EID_GENERIC = 221,
 904         WLAN_EID_VENDOR_SPECIFIC = 221,
 905         WLAN_EID_QOS_PARAMETER = 222
 906 };
 907
 908 /* Action category code */
 909 enum ieee80211_category {
 910         WLAN_CATEGORY_SPECTRUM_MGMT = 0,
 911         WLAN_CATEGORY_QOS = 1,
 912         WLAN_CATEGORY_DLS = 2,
 913         WLAN_CATEGORY_BACK = 3,
 914         WLAN_CATEGORY_WMM = 17,
 915 };
 916
 917 /* SPECTRUM_MGMT action code */
 918 enum ieee80211_spectrum_mgmt_actioncode {
 919         WLAN_ACTION_SPCT_MSR_REQ = 0,
 920         WLAN_ACTION_SPCT_MSR_RPRT = 1,
 921         WLAN_ACTION_SPCT_TPC_REQ = 2,
 922         WLAN_ACTION_SPCT_TPC_RPRT = 3,
 923         WLAN_ACTION_SPCT_CHL_SWITCH = 4,
 924 };
 925
 926 /* BACK action code */
 927 enum ieee80211_back_actioncode {
 928         WLAN_ACTION_ADDBA_REQ = 0,
 929         WLAN_ACTION_ADDBA_RESP = 1,
 930         WLAN_ACTION_DELBA = 2,
 931 };
 932
 933 /* BACK (block-ack) parties */
 934 enum ieee80211_back_parties {
 935         WLAN_BACK_RECIPIENT = 0,
 936         WLAN_BACK_INITIATOR = 1,
 937         WLAN_BACK_TIMER = 2,
 938 };
 939
 940 /* A-MSDU 802.11n */
 941 #define IEEE80211_QOS_CONTROL_A_MSDU_PRESENT 0x0080
 942
 943 /* cipher suite selectors */
 944 #define WLAN_CIPHER_SUITE_USE_GROUP     0x000FAC00
 945 #define WLAN_CIPHER_SUITE_WEP40         0x000FAC01
 946 #define WLAN_CIPHER_SUITE_TKIP          0x000FAC02
 947 /* reserved:                            0x000FAC03 */
 948 #define WLAN_CIPHER_SUITE_CCMP          0x000FAC04
 949 #define WLAN_CIPHER_SUITE_WEP104        0x000FAC05
 950
 951 #define WLAN_MAX_KEY_LEN                32
 952
 953 /**
 954  * ieee80211_get_qos_ctl - get pointer to qos control bytes
 955  * @hdr: the frame
 956  *
 957  * The qos ctrl bytes come after the frame_control, duration, seq_num
 958  * and 3 or 4 addresses of length ETH_ALEN.
 959  * 3 addr: 2 + 2 + 2 + 3*6 = 24
 960  * 4 addr: 2 + 2 + 2 + 4*6 = 30
 961  */
 962 static inline u8 *ieee80211_get_qos_ctl(struct ieee80211_hdr *hdr)
 963 {
 964         if (ieee80211_has_a4(hdr->frame_control))
 965                 return (u8 *)hdr + 30;
 966         else
 967                 return (u8 *)hdr + 24;
 968 }
 969
 970 /**
 971  * ieee80211_get_SA - get pointer to SA
 972  * @hdr: the frame
 973  *
 974  * Given an 802.11 frame, this function returns the offset
 975  * to the source address (SA). It does not verify that the
 976  * header is long enough to contain the address, and the
 977  * header must be long enough to contain the frame control
 978  * field.
 979  */
 980 static inline u8 *ieee80211_get_SA(struct ieee80211_hdr *hdr)
 981 {
 982         if (ieee80211_has_a4(hdr->frame_control))
 983                 return hdr->addr4;
 984         if (ieee80211_has_fromds(hdr->frame_control))
 985                 return hdr->addr3;
 986         return hdr->addr2;
 987 }
 988
 989 /**
 990  * ieee80211_get_DA - get pointer to DA
 991  * @hdr: the frame
 992  *
 993  * Given an 802.11 frame, this function returns the offset
 994  * to the destination address (DA). It does not verify that
 995  * the header is long enough to contain the address, and the
 996  * header must be long enough to contain the frame control
 997  * field.
 998  */
 999 static inline u8 *ieee80211_get_DA(struct ieee80211_hdr *hdr)
1000 {
1001         if (ieee80211_has_tods(hdr->frame_control))
1002                 return hdr->addr3;
1003         else
1004                 return hdr->addr1;
1005 }
1006
1007 #endif /* IEEE80211_H */