1 /* 2 * IEEE 802.11 defines 3 * 4 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen 5 * <[email protected]> 6 * Copyright (c) 2002-2003, Jouni Malinen <[email protected]> 7 * Copyright (c) 2005, Devicescape Software, Inc. 8 * Copyright (c) 2006, Michael Wu <[email protected]> 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 #define IEEE80211_QOS_CTL_TID_MASK 0x000F 103 #define IEEE80211_QOS_CTL_TAG1D_MASK 0x0007 104 105 struct ieee80211_hdr { 106 __le16 frame_control; 107 __le16 duration_id; 108 u8 addr1[6]; 109 u8 addr2[6]; 110 u8 addr3[6]; 111 __le16 seq_ctrl; 112 u8 addr4[6]; 113 } __attribute__ ((packed)); 114 115 /** 116 * ieee80211_has_tods - check if IEEE80211_FCTL_TODS is set 117 * @fc: frame control bytes in little-endian byteorder 118 */ 119 static inline int ieee80211_has_tods(__le16 fc) 120 { 121 return (fc & cpu_to_le16(IEEE80211_FCTL_TODS)) != 0; 122 } 123 124 /** 125 * ieee80211_has_fromds - check if IEEE80211_FCTL_FROMDS is set 126 * @fc: frame control bytes in little-endian byteorder 127 */ 128 static inline int ieee80211_has_fromds(__le16 fc) 129 { 130 return (fc & cpu_to_le16(IEEE80211_FCTL_FROMDS)) != 0; 131 } 132 133 /** 134 * ieee80211_has_a4 - check if IEEE80211_FCTL_TODS and IEEE80211_FCTL_FROMDS are set 135 * @fc: frame control bytes in little-endian byteorder 136 */ 137 static inline int ieee80211_has_a4(__le16 fc) 138 { 139 __le16 tmp = cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS); 140 return (fc & tmp) == tmp; 141 } 142 143 /** 144 * ieee80211_has_morefrags - check if IEEE80211_FCTL_MOREFRAGS is set 145 * @fc: frame control bytes in little-endian byteorder 146 */ 147 static inline int ieee80211_has_morefrags(__le16 fc) 148 { 149 return (fc & cpu_to_le16(IEEE80211_FCTL_MOREFRAGS)) != 0; 150 } 151 152 /** 153 * ieee80211_has_retry - check if IEEE80211_FCTL_RETRY is set 154 * @fc: frame control bytes in little-endian byteorder 155 */ 156 static inline int ieee80211_has_retry(__le16 fc) 157 { 158 return (fc & cpu_to_le16(IEEE80211_FCTL_RETRY)) != 0; 159 } 160 161 /** 162 * ieee80211_has_pm - check if IEEE80211_FCTL_PM is set 163 * @fc: frame control bytes in little-endian byteorder 164 */ 165 static inline int ieee80211_has_pm(__le16 fc) 166 { 167 return (fc & cpu_to_le16(IEEE80211_FCTL_PM)) != 0; 168 } 169 170 /** 171 * ieee80211_has_moredata - check if IEEE80211_FCTL_MOREDATA is set 172 * @fc: frame control bytes in little-endian byteorder 173 */ 174 static inline int ieee80211_has_moredata(__le16 fc) 175 { 176 return (fc & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) != 0; 177 } 178 179 /** 180 * ieee80211_has_protected - check if IEEE80211_FCTL_PROTECTED is set 181 * @fc: frame control bytes in little-endian byteorder 182 */ 183 static inline int ieee80211_has_protected(__le16 fc) 184 { 185 return (fc & cpu_to_le16(IEEE80211_FCTL_PROTECTED)) != 0; 186 } 187 188 /** 189 * ieee80211_has_order - check if IEEE80211_FCTL_ORDER is set 190 * @fc: frame control bytes in little-endian byteorder 191 */ 192 static inline int ieee80211_has_order(__le16 fc) 193 { 194 return (fc & cpu_to_le16(IEEE80211_FCTL_ORDER)) != 0; 195 } 196 197 /** 198 * ieee80211_is_mgmt - check if type is IEEE80211_FTYPE_MGMT 199 * @fc: frame control bytes in little-endian byteorder 200 */ 201 static inline int ieee80211_is_mgmt(__le16 fc) 202 { 203 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) == 204 cpu_to_le16(IEEE80211_FTYPE_MGMT); 205 } 206 207 /** 208 * ieee80211_is_ctl - check if type is IEEE80211_FTYPE_CTL 209 * @fc: frame control bytes in little-endian byteorder 210 */ 211 static inline int ieee80211_is_ctl(__le16 fc) 212 { 213 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) == 214 cpu_to_le16(IEEE80211_FTYPE_CTL); 215 } 216 217 /** 218 * ieee80211_is_data - check if type is IEEE80211_FTYPE_DATA 219 * @fc: frame control bytes in little-endian byteorder 220 */ 221 static inline int ieee80211_is_data(__le16 fc) 222 { 223 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) == 224 cpu_to_le16(IEEE80211_FTYPE_DATA); 225 } 226 227 /** 228 * ieee80211_is_data_qos - check if type is IEEE80211_FTYPE_DATA and IEEE80211_STYPE_QOS_DATA is set 229 * @fc: frame control bytes in little-endian byteorder 230 */ 231 static inline int ieee80211_is_data_qos(__le16 fc) 232 { 233 /* 234 * mask with QOS_DATA rather than IEEE80211_FCTL_STYPE as we just need 235 * to check the one bit 236 */ 237 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_STYPE_QOS_DATA)) == 238 cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_DATA); 239 } 240 241 /** 242 * ieee80211_is_data_present - check if type is IEEE80211_FTYPE_DATA and has data 243 * @fc: frame control bytes in little-endian byteorder 244 */ 245 static inline int ieee80211_is_data_present(__le16 fc) 246 { 247 /* 248 * mask with 0x40 and test that that bit is clear to only return true 249 * for the data-containing substypes. 250 */ 251 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | 0x40)) == 252 cpu_to_le16(IEEE80211_FTYPE_DATA); 253 } 254 255 /** 256 * ieee80211_is_assoc_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ASSOC_REQ 257 * @fc: frame control bytes in little-endian byteorder 258 */ 259 static inline int ieee80211_is_assoc_req(__le16 fc) 260 { 261 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 262 cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ASSOC_REQ); 263 } 264 265 /** 266 * ieee80211_is_assoc_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ASSOC_RESP 267 * @fc: frame control bytes in little-endian byteorder 268 */ 269 static inline int ieee80211_is_assoc_resp(__le16 fc) 270 { 271 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 272 cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ASSOC_RESP); 273 } 274 275 /** 276 * ieee80211_is_reassoc_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_REASSOC_REQ 277 * @fc: frame control bytes in little-endian byteorder 278 */ 279 static inline int ieee80211_is_reassoc_req(__le16 fc) 280 { 281 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 282 cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_REASSOC_REQ); 283 } 284 285 /** 286 * ieee80211_is_reassoc_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_REASSOC_RESP 287 * @fc: frame control bytes in little-endian byteorder 288 */ 289 static inline int ieee80211_is_reassoc_resp(__le16 fc) 290 { 291 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 292 cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_REASSOC_RESP); 293 } 294 295 /** 296 * ieee80211_is_probe_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_PROBE_REQ 297 * @fc: frame control bytes in little-endian byteorder 298 */ 299 static inline int ieee80211_is_probe_req(__le16 fc) 300 { 301 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 302 cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_REQ); 303 } 304 305 /** 306 * ieee80211_is_probe_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_PROBE_RESP 307 * @fc: frame control bytes in little-endian byteorder 308 */ 309 static inline int ieee80211_is_probe_resp(__le16 fc) 310 { 311 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 312 cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_RESP); 313 } 314 315 /** 316 * ieee80211_is_beacon - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_BEACON 317 * @fc: frame control bytes in little-endian byteorder 318 */ 319 static inline int ieee80211_is_beacon(__le16 fc) 320 { 321 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 322 cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON); 323 } 324 325 /** 326 * ieee80211_is_atim - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ATIM 327 * @fc: frame control bytes in little-endian byteorder 328 */ 329 static inline int ieee80211_is_atim(__le16 fc) 330 { 331 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 332 cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ATIM); 333 } 334 335 /** 336 * ieee80211_is_disassoc - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_DISASSOC 337 * @fc: frame control bytes in little-endian byteorder 338 */ 339 static inline int ieee80211_is_disassoc(__le16 fc) 340 { 341 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 342 cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DISASSOC); 343 } 344 345 /** 346 * ieee80211_is_auth - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_AUTH 347 * @fc: frame control bytes in little-endian byteorder 348 */ 349 static inline int ieee80211_is_auth(__le16 fc) 350 { 351 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 352 cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH); 353 } 354 355 /** 356 * ieee80211_is_deauth - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_DEAUTH 357 * @fc: frame control bytes in little-endian byteorder 358 */ 359 static inline int ieee80211_is_deauth(__le16 fc) 360 { 361 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 362 cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DEAUTH); 363 } 364 365 /** 366 * ieee80211_is_action - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ACTION 367 * @fc: frame control bytes in little-endian byteorder 368 */ 369 static inline int ieee80211_is_action(__le16 fc) 370 { 371 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 372 cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION); 373 } 374 375 /** 376 * ieee80211_is_back_req - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_BACK_REQ 377 * @fc: frame control bytes in little-endian byteorder 378 */ 379 static inline int ieee80211_is_back_req(__le16 fc) 380 { 381 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 382 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK_REQ); 383 } 384 385 /** 386 * ieee80211_is_back - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_BACK 387 * @fc: frame control bytes in little-endian byteorder 388 */ 389 static inline int ieee80211_is_back(__le16 fc) 390 { 391 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 392 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK); 393 } 394 395 /** 396 * ieee80211_is_pspoll - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_PSPOLL 397 * @fc: frame control bytes in little-endian byteorder 398 */ 399 static inline int ieee80211_is_pspoll(__le16 fc) 400 { 401 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 402 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL); 403 } 404 405 /** 406 * ieee80211_is_rts - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_RTS 407 * @fc: frame control bytes in little-endian byteorder 408 */ 409 static inline int ieee80211_is_rts(__le16 fc) 410 { 411 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 412 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); 413 } 414 415 /** 416 * ieee80211_is_cts - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CTS 417 * @fc: frame control bytes in little-endian byteorder 418 */ 419 static inline int ieee80211_is_cts(__le16 fc) 420 { 421 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 422 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); 423 } 424 425 /** 426 * ieee80211_is_ack - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_ACK 427 * @fc: frame control bytes in little-endian byteorder 428 */ 429 static inline int ieee80211_is_ack(__le16 fc) 430 { 431 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 432 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK); 433 } 434 435 /** 436 * ieee80211_is_cfend - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CFEND 437 * @fc: frame control bytes in little-endian byteorder 438 */ 439 static inline int ieee80211_is_cfend(__le16 fc) 440 { 441 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 442 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CFEND); 443 } 444 445 /** 446 * ieee80211_is_cfendack - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CFENDACK 447 * @fc: frame control bytes in little-endian byteorder 448 */ 449 static inline int ieee80211_is_cfendack(__le16 fc) 450 { 451 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 452 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CFENDACK); 453 } 454 455 /** 456 * ieee80211_is_nullfunc - check if FTYPE=IEEE80211_FTYPE_DATA and STYPE=IEEE80211_STYPE_NULLFUNC 457 * @fc: frame control bytes in little-endian byteorder 458 */ 459 static inline int ieee80211_is_nullfunc(__le16 fc) 460 { 461 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 462 cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC); 463 } 464 465 struct ieee80211s_hdr { 466 u8 flags; 467 u8 ttl; 468 __le32 seqnum; 469 u8 eaddr1[6]; 470 u8 eaddr2[6]; 471 u8 eaddr3[6]; 472 } __attribute__ ((packed)); 473 474 /* Mesh flags */ 475 #define MESH_FLAGS_AE_A4 0x1 476 #define MESH_FLAGS_AE_A5_A6 0x2 477 #define MESH_FLAGS_PS_DEEP 0x4 478 479 /** 480 * struct ieee80211_quiet_ie 481 * 482 * This structure refers to "Quiet information element" 483 */ 484 struct ieee80211_quiet_ie { 485 u8 count; 486 u8 period; 487 __le16 duration; 488 __le16 offset; 489 } __attribute__ ((packed)); 490 491 /** 492 * struct ieee80211_msrment_ie 493 * 494 * This structure refers to "Measurement Request/Report information element" 495 */ 496 struct ieee80211_msrment_ie { 497 u8 token; 498 u8 mode; 499 u8 type; 500 u8 request[0]; 501 } __attribute__ ((packed)); 502 503 /** 504 * struct ieee80211_channel_sw_ie 505 * 506 * This structure refers to "Channel Switch Announcement information element" 507 */ 508 struct ieee80211_channel_sw_ie { 509 u8 mode; 510 u8 new_ch_num; 511 u8 count; 512 } __attribute__ ((packed)); 513 514 /** 515 * struct ieee80211_tim 516 * 517 * This structure refers to "Traffic Indication Map information element" 518 */ 519 struct ieee80211_tim_ie { 520 u8 dtim_count; 521 u8 dtim_period; 522 u8 bitmap_ctrl; 523 /* variable size: 1 - 251 bytes */ 524 u8 virtual_map[0]; 525 } __attribute__ ((packed)); 526 527 struct ieee80211_mgmt { 528 __le16 frame_control; 529 __le16 duration; 530 u8 da[6]; 531 u8 sa[6]; 532 u8 bssid[6]; 533 __le16 seq_ctrl; 534 union { 535 struct { 536 __le16 auth_alg; 537 __le16 auth_transaction; 538 __le16 status_code; 539 /* possibly followed by Challenge text */ 540 u8 variable[0]; 541 } __attribute__ ((packed)) auth; 542 struct { 543 __le16 reason_code; 544 } __attribute__ ((packed)) deauth; 545 struct { 546 __le16 capab_info; 547 __le16 listen_interval; 548 /* followed by SSID and Supported rates */ 549 u8 variable[0]; 550 } __attribute__ ((packed)) assoc_req; 551 struct { 552 __le16 capab_info; 553 __le16 status_code; 554 __le16 aid; 555 /* followed by Supported rates */ 556 u8 variable[0]; 557 } __attribute__ ((packed)) assoc_resp, reassoc_resp; 558 struct { 559 __le16 capab_info; 560 __le16 listen_interval; 561 u8 current_ap[6]; 562 /* followed by SSID and Supported rates */ 563 u8 variable[0]; 564 } __attribute__ ((packed)) reassoc_req; 565 struct { 566 __le16 reason_code; 567 } __attribute__ ((packed)) disassoc; 568 struct { 569 __le64 timestamp; 570 __le16 beacon_int; 571 __le16 capab_info; 572 /* followed by some of SSID, Supported rates, 573 * FH Params, DS Params, CF Params, IBSS Params, TIM */ 574 u8 variable[0]; 575 } __attribute__ ((packed)) beacon; 576 struct { 577 /* only variable items: SSID, Supported rates */ 578 u8 variable[0]; 579 } __attribute__ ((packed)) probe_req; 580 struct { 581 __le64 timestamp; 582 __le16 beacon_int; 583 __le16 capab_info; 584 /* followed by some of SSID, Supported rates, 585 * FH Params, DS Params, CF Params, IBSS Params */ 586 u8 variable[0]; 587 } __attribute__ ((packed)) probe_resp; 588 struct { 589 u8 category; 590 union { 591 struct { 592 u8 action_code; 593 u8 dialog_token; 594 u8 status_code; 595 u8 variable[0]; 596 } __attribute__ ((packed)) wme_action; 597 struct{ 598 u8 action_code; 599 u8 element_id; 600 u8 length; 601 struct ieee80211_channel_sw_ie sw_elem; 602 } __attribute__((packed)) chan_switch; 603 struct{ 604 u8 action_code; 605 u8 dialog_token; 606 u8 element_id; 607 u8 length; 608 struct ieee80211_msrment_ie msr_elem; 609 } __attribute__((packed)) measurement; 610 struct{ 611 u8 action_code; 612 u8 dialog_token; 613 __le16 capab; 614 __le16 timeout; 615 __le16 start_seq_num; 616 } __attribute__((packed)) addba_req; 617 struct{ 618 u8 action_code; 619 u8 dialog_token; 620 __le16 status; 621 __le16 capab; 622 __le16 timeout; 623 } __attribute__((packed)) addba_resp; 624 struct{ 625 u8 action_code; 626 __le16 params; 627 __le16 reason_code; 628 } __attribute__((packed)) delba; 629 struct{ 630 u8 action_code; 631 /* capab_info for open and confirm, 632 * reason for close 633 */ 634 __le16 aux; 635 /* Followed in plink_confirm by status 636 * code, AID and supported rates, 637 * and directly by supported rates in 638 * plink_open and plink_close 639 */ 640 u8 variable[0]; 641 } __attribute__((packed)) plink_action; 642 struct{ 643 u8 action_code; 644 u8 variable[0]; 645 } __attribute__((packed)) mesh_action; 646 } u; 647 } __attribute__ ((packed)) action; 648 } u; 649 } __attribute__ ((packed)); 650 651 /* mgmt header + 1 byte category code */ 652 #define IEEE80211_MIN_ACTION_SIZE offsetof(struct ieee80211_mgmt, u.action.u) 653 654 655 /* Control frames */ 656 struct ieee80211_rts { 657 __le16 frame_control; 658 __le16 duration; 659 u8 ra[6]; 660 u8 ta[6]; 661 } __attribute__ ((packed)); 662 663 struct ieee80211_cts { 664 __le16 frame_control; 665 __le16 duration; 666 u8 ra[6]; 667 } __attribute__ ((packed)); 668 669 /** 670 * struct ieee80211_bar - HT Block Ack Request 671 * 672 * This structure refers to "HT BlockAckReq" as 673 * described in 802.11n draft section 7.2.1.7.1 674 */ 675 struct ieee80211_bar { 676 __le16 frame_control; 677 __le16 duration; 678 __u8 ra[6]; 679 __u8 ta[6]; 680 __le16 control; 681 __le16 start_seq_num; 682 } __attribute__((packed)); 683 684 /* 802.11 BAR control masks */ 685 #define IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL 0x0000 686 #define IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA 0x0004 687 688 /** 689 * struct ieee80211_ht_cap - HT capabilities 690 * 691 * This structure refers to "HT capabilities element" as 692 * described in 802.11n draft section 7.3.2.52 693 */ 694 struct ieee80211_ht_cap { 695 __le16 cap_info; 696 u8 ampdu_params_info; 697 u8 supp_mcs_set[16]; 698 __le16 extended_ht_cap_info; 699 __le32 tx_BF_cap_info; 700 u8 antenna_selection_info; 701 } __attribute__ ((packed)); 702 703 /** 704 * struct ieee80211_ht_cap - HT additional information 705 * 706 * This structure refers to "HT information element" as 707 * described in 802.11n draft section 7.3.2.53 708 */ 709 struct ieee80211_ht_addt_info { 710 u8 control_chan; 711 u8 ht_param; 712 __le16 operation_mode; 713 __le16 stbc_param; 714 u8 basic_set[16]; 715 } __attribute__ ((packed)); 716 717 /* 802.11n HT capabilities masks */ 718 #define IEEE80211_HT_CAP_SUP_WIDTH 0x0002 719 #define IEEE80211_HT_CAP_SM_PS 0x000C 720 #define IEEE80211_HT_CAP_GRN_FLD 0x0010 721 #define IEEE80211_HT_CAP_SGI_20 0x0020 722 #define IEEE80211_HT_CAP_SGI_40 0x0040 723 #define IEEE80211_HT_CAP_DELAY_BA 0x0400 724 #define IEEE80211_HT_CAP_MAX_AMSDU 0x0800 725 #define IEEE80211_HT_CAP_DSSSCCK40 0x1000 726 /* 802.11n HT capability AMPDU settings */ 727 #define IEEE80211_HT_CAP_AMPDU_FACTOR 0x03 728 #define IEEE80211_HT_CAP_AMPDU_DENSITY 0x1C 729 /* 802.11n HT capability MSC set */ 730 #define IEEE80211_SUPP_MCS_SET_UEQM 4 731 #define IEEE80211_HT_CAP_MAX_STREAMS 4 732 #define IEEE80211_SUPP_MCS_SET_LEN 10 733 /* maximum streams the spec allows */ 734 #define IEEE80211_HT_CAP_MCS_TX_DEFINED 0x01 735 #define IEEE80211_HT_CAP_MCS_TX_RX_DIFF 0x02 736 #define IEEE80211_HT_CAP_MCS_TX_STREAMS 0x0C 737 #define IEEE80211_HT_CAP_MCS_TX_UEQM 0x10 738 /* 802.11n HT IE masks */ 739 #define IEEE80211_HT_IE_CHA_SEC_OFFSET 0x03 740 #define IEEE80211_HT_IE_CHA_SEC_NONE 0x00 741 #define IEEE80211_HT_IE_CHA_SEC_ABOVE 0x01 742 #define IEEE80211_HT_IE_CHA_SEC_BELOW 0x03 743 #define IEEE80211_HT_IE_CHA_WIDTH 0x04 744 #define IEEE80211_HT_IE_HT_PROTECTION 0x0003 745 #define IEEE80211_HT_IE_NON_GF_STA_PRSNT 0x0004 746 #define IEEE80211_HT_IE_NON_HT_STA_PRSNT 0x0010 747 748 /* block-ack parameters */ 749 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002 750 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C 751 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0 752 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000 753 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800 754 755 /* 756 * A-PMDU buffer sizes 757 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) 758 */ 759 #define IEEE80211_MIN_AMPDU_BUF 0x8 760 #define IEEE80211_MAX_AMPDU_BUF 0x40 761 762 763 /* Spatial Multiplexing Power Save Modes */ 764 #define WLAN_HT_CAP_SM_PS_STATIC 0 765 #define WLAN_HT_CAP_SM_PS_DYNAMIC 1 766 #define WLAN_HT_CAP_SM_PS_INVALID 2 767 #define WLAN_HT_CAP_SM_PS_DISABLED 3 768 769 /* Authentication algorithms */ 770 #define WLAN_AUTH_OPEN 0 771 #define WLAN_AUTH_SHARED_KEY 1 772 #define WLAN_AUTH_FAST_BSS_TRANSITION 2 773 #define WLAN_AUTH_LEAP 128 774 775 #define WLAN_AUTH_CHALLENGE_LEN 128 776 777 #define WLAN_CAPABILITY_ESS (1<<0) 778 #define WLAN_CAPABILITY_IBSS (1<<1) 779 #define WLAN_CAPABILITY_CF_POLLABLE (1<<2) 780 #define WLAN_CAPABILITY_CF_POLL_REQUEST (1<<3) 781 #define WLAN_CAPABILITY_PRIVACY (1<<4) 782 #define WLAN_CAPABILITY_SHORT_PREAMBLE (1<<5) 783 #define WLAN_CAPABILITY_PBCC (1<<6) 784 #define WLAN_CAPABILITY_CHANNEL_AGILITY (1<<7) 785 786 /* 802.11h */ 787 #define WLAN_CAPABILITY_SPECTRUM_MGMT (1<<8) 788 #define WLAN_CAPABILITY_QOS (1<<9) 789 #define WLAN_CAPABILITY_SHORT_SLOT_TIME (1<<10) 790 #define WLAN_CAPABILITY_DSSS_OFDM (1<<13) 791 /* measurement */ 792 #define IEEE80211_SPCT_MSR_RPRT_MODE_LATE (1<<0) 793 #define IEEE80211_SPCT_MSR_RPRT_MODE_INCAPABLE (1<<1) 794 #define IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED (1<<2) 795 796 #define IEEE80211_SPCT_MSR_RPRT_TYPE_BASIC 0 797 #define IEEE80211_SPCT_MSR_RPRT_TYPE_CCA 1 798 #define IEEE80211_SPCT_MSR_RPRT_TYPE_RPI 2 799 800 801 /* 802.11g ERP information element */ 802 #define WLAN_ERP_NON_ERP_PRESENT (1<<0) 803 #define WLAN_ERP_USE_PROTECTION (1<<1) 804 #define WLAN_ERP_BARKER_PREAMBLE (1<<2) 805 806 /* WLAN_ERP_BARKER_PREAMBLE values */ 807 enum { 808 WLAN_ERP_PREAMBLE_SHORT = 0, 809 WLAN_ERP_PREAMBLE_LONG = 1, 810 }; 811 812 /* Status codes */ 813 enum ieee80211_statuscode { 814 WLAN_STATUS_SUCCESS = 0, 815 WLAN_STATUS_UNSPECIFIED_FAILURE = 1, 816 WLAN_STATUS_CAPS_UNSUPPORTED = 10, 817 WLAN_STATUS_REASSOC_NO_ASSOC = 11, 818 WLAN_STATUS_ASSOC_DENIED_UNSPEC = 12, 819 WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG = 13, 820 WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION = 14, 821 WLAN_STATUS_CHALLENGE_FAIL = 15, 822 WLAN_STATUS_AUTH_TIMEOUT = 16, 823 WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA = 17, 824 WLAN_STATUS_ASSOC_DENIED_RATES = 18, 825 /* 802.11b */ 826 WLAN_STATUS_ASSOC_DENIED_NOSHORTPREAMBLE = 19, 827 WLAN_STATUS_ASSOC_DENIED_NOPBCC = 20, 828 WLAN_STATUS_ASSOC_DENIED_NOAGILITY = 21, 829 /* 802.11h */ 830 WLAN_STATUS_ASSOC_DENIED_NOSPECTRUM = 22, 831 WLAN_STATUS_ASSOC_REJECTED_BAD_POWER = 23, 832 WLAN_STATUS_ASSOC_REJECTED_BAD_SUPP_CHAN = 24, 833 /* 802.11g */ 834 WLAN_STATUS_ASSOC_DENIED_NOSHORTTIME = 25, 835 WLAN_STATUS_ASSOC_DENIED_NODSSSOFDM = 26, 836 /* 802.11i */ 837 WLAN_STATUS_INVALID_IE = 40, 838 WLAN_STATUS_INVALID_GROUP_CIPHER = 41, 839 WLAN_STATUS_INVALID_PAIRWISE_CIPHER = 42, 840 WLAN_STATUS_INVALID_AKMP = 43, 841 WLAN_STATUS_UNSUPP_RSN_VERSION = 44, 842 WLAN_STATUS_INVALID_RSN_IE_CAP = 45, 843 WLAN_STATUS_CIPHER_SUITE_REJECTED = 46, 844 /* 802.11e */ 845 WLAN_STATUS_UNSPECIFIED_QOS = 32, 846 WLAN_STATUS_ASSOC_DENIED_NOBANDWIDTH = 33, 847 WLAN_STATUS_ASSOC_DENIED_LOWACK = 34, 848 WLAN_STATUS_ASSOC_DENIED_UNSUPP_QOS = 35, 849 WLAN_STATUS_REQUEST_DECLINED = 37, 850 WLAN_STATUS_INVALID_QOS_PARAM = 38, 851 WLAN_STATUS_CHANGE_TSPEC = 39, 852 WLAN_STATUS_WAIT_TS_DELAY = 47, 853 WLAN_STATUS_NO_DIRECT_LINK = 48, 854 WLAN_STATUS_STA_NOT_PRESENT = 49, 855 WLAN_STATUS_STA_NOT_QSTA = 50, 856 }; 857 858 859 /* Reason codes */ 860 enum ieee80211_reasoncode { 861 WLAN_REASON_UNSPECIFIED = 1, 862 WLAN_REASON_PREV_AUTH_NOT_VALID = 2, 863 WLAN_REASON_DEAUTH_LEAVING = 3, 864 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY = 4, 865 WLAN_REASON_DISASSOC_AP_BUSY = 5, 866 WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA = 6, 867 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA = 7, 868 WLAN_REASON_DISASSOC_STA_HAS_LEFT = 8, 869 WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH = 9, 870 /* 802.11h */ 871 WLAN_REASON_DISASSOC_BAD_POWER = 10, 872 WLAN_REASON_DISASSOC_BAD_SUPP_CHAN = 11, 873 /* 802.11i */ 874 WLAN_REASON_INVALID_IE = 13, 875 WLAN_REASON_MIC_FAILURE = 14, 876 WLAN_REASON_4WAY_HANDSHAKE_TIMEOUT = 15, 877 WLAN_REASON_GROUP_KEY_HANDSHAKE_TIMEOUT = 16, 878 WLAN_REASON_IE_DIFFERENT = 17, 879 WLAN_REASON_INVALID_GROUP_CIPHER = 18, 880 WLAN_REASON_INVALID_PAIRWISE_CIPHER = 19, 881 WLAN_REASON_INVALID_AKMP = 20, 882 WLAN_REASON_UNSUPP_RSN_VERSION = 21, 883 WLAN_REASON_INVALID_RSN_IE_CAP = 22, 884 WLAN_REASON_IEEE8021X_FAILED = 23, 885 WLAN_REASON_CIPHER_SUITE_REJECTED = 24, 886 /* 802.11e */ 887 WLAN_REASON_DISASSOC_UNSPECIFIED_QOS = 32, 888 WLAN_REASON_DISASSOC_QAP_NO_BANDWIDTH = 33, 889 WLAN_REASON_DISASSOC_LOW_ACK = 34, 890 WLAN_REASON_DISASSOC_QAP_EXCEED_TXOP = 35, 891 WLAN_REASON_QSTA_LEAVE_QBSS = 36, 892 WLAN_REASON_QSTA_NOT_USE = 37, 893 WLAN_REASON_QSTA_REQUIRE_SETUP = 38, 894 WLAN_REASON_QSTA_TIMEOUT = 39, 895 WLAN_REASON_QSTA_CIPHER_NOT_SUPP = 45, 896 }; 897 898 899 /* Information Element IDs */ 900 enum ieee80211_eid { 901 WLAN_EID_SSID = 0, 902 WLAN_EID_SUPP_RATES = 1, 903 WLAN_EID_FH_PARAMS = 2, 904 WLAN_EID_DS_PARAMS = 3, 905 WLAN_EID_CF_PARAMS = 4, 906 WLAN_EID_TIM = 5, 907 WLAN_EID_IBSS_PARAMS = 6, 908 WLAN_EID_CHALLENGE = 16, 909 /* 802.11d */ 910 WLAN_EID_COUNTRY = 7, 911 WLAN_EID_HP_PARAMS = 8, 912 WLAN_EID_HP_TABLE = 9, 913 WLAN_EID_REQUEST = 10, 914 /* 802.11e */ 915 WLAN_EID_QBSS_LOAD = 11, 916 WLAN_EID_EDCA_PARAM_SET = 12, 917 WLAN_EID_TSPEC = 13, 918 WLAN_EID_TCLAS = 14, 919 WLAN_EID_SCHEDULE = 15, 920 WLAN_EID_TS_DELAY = 43, 921 WLAN_EID_TCLAS_PROCESSING = 44, 922 WLAN_EID_QOS_CAPA = 46, 923 /* 802.11s 924 * 925 * All mesh EID numbers are pending IEEE 802.11 ANA approval. 926 * The numbers have been incremented from those suggested in 927 * 802.11s/D2.0 so that MESH_CONFIG does not conflict with 928 * EXT_SUPP_RATES. 929 */ 930 WLAN_EID_MESH_CONFIG = 51, 931 WLAN_EID_MESH_ID = 52, 932 WLAN_EID_PEER_LINK = 55, 933 WLAN_EID_PREQ = 68, 934 WLAN_EID_PREP = 69, 935 WLAN_EID_PERR = 70, 936 /* 802.11h */ 937 WLAN_EID_PWR_CONSTRAINT = 32, 938 WLAN_EID_PWR_CAPABILITY = 33, 939 WLAN_EID_TPC_REQUEST = 34, 940 WLAN_EID_TPC_REPORT = 35, 941 WLAN_EID_SUPPORTED_CHANNELS = 36, 942 WLAN_EID_CHANNEL_SWITCH = 37, 943 WLAN_EID_MEASURE_REQUEST = 38, 944 WLAN_EID_MEASURE_REPORT = 39, 945 WLAN_EID_QUIET = 40, 946 WLAN_EID_IBSS_DFS = 41, 947 /* 802.11g */ 948 WLAN_EID_ERP_INFO = 42, 949 WLAN_EID_EXT_SUPP_RATES = 50, 950 /* 802.11n */ 951 WLAN_EID_HT_CAPABILITY = 45, 952 WLAN_EID_HT_EXTRA_INFO = 61, 953 /* 802.11i */ 954 WLAN_EID_RSN = 48, 955 WLAN_EID_WPA = 221, 956 WLAN_EID_GENERIC = 221, 957 WLAN_EID_VENDOR_SPECIFIC = 221, 958 WLAN_EID_QOS_PARAMETER = 222 959 }; 960 961 /* Action category code */ 962 enum ieee80211_category { 963 WLAN_CATEGORY_SPECTRUM_MGMT = 0, 964 WLAN_CATEGORY_QOS = 1, 965 WLAN_CATEGORY_DLS = 2, 966 WLAN_CATEGORY_BACK = 3, 967 WLAN_CATEGORY_WMM = 17, 968 }; 969 970 /* SPECTRUM_MGMT action code */ 971 enum ieee80211_spectrum_mgmt_actioncode { 972 WLAN_ACTION_SPCT_MSR_REQ = 0, 973 WLAN_ACTION_SPCT_MSR_RPRT = 1, 974 WLAN_ACTION_SPCT_TPC_REQ = 2, 975 WLAN_ACTION_SPCT_TPC_RPRT = 3, 976 WLAN_ACTION_SPCT_CHL_SWITCH = 4, 977 }; 978 979 /* BACK action code */ 980 enum ieee80211_back_actioncode { 981 WLAN_ACTION_ADDBA_REQ = 0, 982 WLAN_ACTION_ADDBA_RESP = 1, 983 WLAN_ACTION_DELBA = 2, 984 }; 985 986 /* BACK (block-ack) parties */ 987 enum ieee80211_back_parties { 988 WLAN_BACK_RECIPIENT = 0, 989 WLAN_BACK_INITIATOR = 1, 990 WLAN_BACK_TIMER = 2, 991 }; 992 993 /* A-MSDU 802.11n */ 994 #define IEEE80211_QOS_CONTROL_A_MSDU_PRESENT 0x0080 995 996 /* cipher suite selectors */ 997 #define WLAN_CIPHER_SUITE_USE_GROUP 0x000FAC00 998 #define WLAN_CIPHER_SUITE_WEP40 0x000FAC01 999 #define WLAN_CIPHER_SUITE_TKIP 0x000FAC02 1000 /* reserved: 0x000FAC03 */ 1001 #define WLAN_CIPHER_SUITE_CCMP 0x000FAC04 1002 #define WLAN_CIPHER_SUITE_WEP104 0x000FAC05 1003 1004 #define WLAN_MAX_KEY_LEN 32 1005 1006 /** 1007 * ieee80211_get_qos_ctl - get pointer to qos control bytes 1008 * @hdr: the frame 1009 * 1010 * The qos ctrl bytes come after the frame_control, duration, seq_num 1011 * and 3 or 4 addresses of length ETH_ALEN. 1012 * 3 addr: 2 + 2 + 2 + 3*6 = 24 1013 * 4 addr: 2 + 2 + 2 + 4*6 = 30 1014 */ 1015 static inline u8 *ieee80211_get_qos_ctl(struct ieee80211_hdr *hdr) 1016 { 1017 if (ieee80211_has_a4(hdr->frame_control)) 1018 return (u8 *)hdr + 30; 1019 else 1020 return (u8 *)hdr + 24; 1021 } 1022 1023 /** 1024 * ieee80211_get_SA - get pointer to SA 1025 * @hdr: the frame 1026 * 1027 * Given an 802.11 frame, this function returns the offset 1028 * to the source address (SA). It does not verify that the 1029 * header is long enough to contain the address, and the 1030 * header must be long enough to contain the frame control 1031 * field. 1032 */ 1033 static inline u8 *ieee80211_get_SA(struct ieee80211_hdr *hdr) 1034 { 1035 if (ieee80211_has_a4(hdr->frame_control)) 1036 return hdr->addr4; 1037 if (ieee80211_has_fromds(hdr->frame_control)) 1038 return hdr->addr3; 1039 return hdr->addr2; 1040 } 1041 1042 /** 1043 * ieee80211_get_DA - get pointer to DA 1044 * @hdr: the frame 1045 * 1046 * Given an 802.11 frame, this function returns the offset 1047 * to the destination address (DA). It does not verify that 1048 * the header is long enough to contain the address, and the 1049 * header must be long enough to contain the frame control 1050 * field. 1051 */ 1052 static inline u8 *ieee80211_get_DA(struct ieee80211_hdr *hdr) 1053 { 1054 if (ieee80211_has_tods(hdr->frame_control)) 1055 return hdr->addr3; 1056 else 1057 return hdr->addr1; 1058 } 1059 1060 #endif /* IEEE80211_H */ 1061