mac80211.h revision 21c0cbe760ca6b5d4c6927c3ec1352a843a8c11c
1/* 2 * mac80211 <-> driver interface 3 * 4 * Copyright 2002-2005, Devicescape Software, Inc. 5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 6 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13#ifndef MAC80211_H 14#define MAC80211_H 15 16#include <linux/kernel.h> 17#include <linux/if_ether.h> 18#include <linux/skbuff.h> 19#include <linux/wireless.h> 20#include <linux/device.h> 21#include <linux/ieee80211.h> 22#include <net/wireless.h> 23#include <net/cfg80211.h> 24 25/** 26 * DOC: Introduction 27 * 28 * mac80211 is the Linux stack for 802.11 hardware that implements 29 * only partial functionality in hard- or firmware. This document 30 * defines the interface between mac80211 and low-level hardware 31 * drivers. 32 */ 33 34/** 35 * DOC: Calling mac80211 from interrupts 36 * 37 * Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be 38 * called in hardware interrupt context. The low-level driver must not call any 39 * other functions in hardware interrupt context. If there is a need for such 40 * call, the low-level driver should first ACK the interrupt and perform the 41 * IEEE 802.11 code call after this, e.g. from a scheduled workqueue or even 42 * tasklet function. 43 * 44 * NOTE: If the driver opts to use the _irqsafe() functions, it may not also 45 * use the non-irqsafe functions! 46 */ 47 48/** 49 * DOC: Warning 50 * 51 * If you're reading this document and not the header file itself, it will 52 * be incomplete because not all documentation has been converted yet. 53 */ 54 55/** 56 * DOC: Frame format 57 * 58 * As a general rule, when frames are passed between mac80211 and the driver, 59 * they start with the IEEE 802.11 header and include the same octets that are 60 * sent over the air except for the FCS which should be calculated by the 61 * hardware. 62 * 63 * There are, however, various exceptions to this rule for advanced features: 64 * 65 * The first exception is for hardware encryption and decryption offload 66 * where the IV/ICV may or may not be generated in hardware. 67 * 68 * Secondly, when the hardware handles fragmentation, the frame handed to 69 * the driver from mac80211 is the MSDU, not the MPDU. 70 * 71 * Finally, for received frames, the driver is able to indicate that it has 72 * filled a radiotap header and put that in front of the frame; if it does 73 * not do so then mac80211 may add this under certain circumstances. 74 */ 75 76/** 77 * struct ieee80211_ht_bss_info - describing BSS's HT characteristics 78 * 79 * This structure describes most essential parameters needed 80 * to describe 802.11n HT characteristics in a BSS 81 * 82 * @primary_channel: channel number of primery channel 83 * @bss_cap: 802.11n's general BSS capabilities (e.g. channel width) 84 * @bss_op_mode: 802.11n's BSS operation modes (e.g. HT protection) 85 */ 86struct ieee80211_ht_bss_info { 87 u8 primary_channel; 88 u8 bss_cap; /* use IEEE80211_HT_IE_CHA_ */ 89 u8 bss_op_mode; /* use IEEE80211_HT_IE_ */ 90}; 91 92/** 93 * struct ieee80211_tx_queue_params - transmit queue configuration 94 * 95 * The information provided in this structure is required for QoS 96 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29. 97 * 98 * @aifs: arbitration interface space [0..255, -1: use default] 99 * @cw_min: minimum contention window [will be a value of the form 100 * 2^n-1 in the range 1..1023; 0: use default] 101 * @cw_max: maximum contention window [like @cw_min] 102 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled 103 */ 104struct ieee80211_tx_queue_params { 105 s16 aifs; 106 u16 cw_min; 107 u16 cw_max; 108 u16 txop; 109}; 110 111/** 112 * struct ieee80211_tx_queue_stats_data - transmit queue statistics 113 * 114 * @len: number of packets in queue 115 * @limit: queue length limit 116 * @count: number of frames sent 117 */ 118struct ieee80211_tx_queue_stats_data { 119 unsigned int len; 120 unsigned int limit; 121 unsigned int count; 122}; 123 124/** 125 * enum ieee80211_tx_queue - transmit queue number 126 * 127 * These constants are used with some callbacks that take a 128 * queue number to set parameters for a queue. 129 * 130 * @IEEE80211_TX_QUEUE_DATA0: data queue 0 131 * @IEEE80211_TX_QUEUE_DATA1: data queue 1 132 * @IEEE80211_TX_QUEUE_DATA2: data queue 2 133 * @IEEE80211_TX_QUEUE_DATA3: data queue 3 134 * @IEEE80211_TX_QUEUE_DATA4: data queue 4 135 * @IEEE80211_TX_QUEUE_SVP: ?? 136 * @NUM_TX_DATA_QUEUES: number of data queues 137 * @IEEE80211_TX_QUEUE_AFTER_BEACON: transmit queue for frames to be 138 * sent after a beacon 139 * @IEEE80211_TX_QUEUE_BEACON: transmit queue for beacon frames 140 * @NUM_TX_DATA_QUEUES_AMPDU: adding more queues for A-MPDU 141 */ 142enum ieee80211_tx_queue { 143 IEEE80211_TX_QUEUE_DATA0, 144 IEEE80211_TX_QUEUE_DATA1, 145 IEEE80211_TX_QUEUE_DATA2, 146 IEEE80211_TX_QUEUE_DATA3, 147 IEEE80211_TX_QUEUE_DATA4, 148 IEEE80211_TX_QUEUE_SVP, 149 150 NUM_TX_DATA_QUEUES, 151 152/* due to stupidity in the sub-ioctl userspace interface, the items in 153 * this struct need to have fixed values. As soon as it is removed, we can 154 * fix these entries. */ 155 IEEE80211_TX_QUEUE_AFTER_BEACON = 6, 156 IEEE80211_TX_QUEUE_BEACON = 7, 157 NUM_TX_DATA_QUEUES_AMPDU = 16 158}; 159 160struct ieee80211_tx_queue_stats { 161 struct ieee80211_tx_queue_stats_data data[NUM_TX_DATA_QUEUES_AMPDU]; 162}; 163 164struct ieee80211_low_level_stats { 165 unsigned int dot11ACKFailureCount; 166 unsigned int dot11RTSFailureCount; 167 unsigned int dot11FCSErrorCount; 168 unsigned int dot11RTSSuccessCount; 169}; 170 171/** 172 * enum ieee80211_bss_change - BSS change notification flags 173 * 174 * These flags are used with the bss_info_changed() callback 175 * to indicate which BSS parameter changed. 176 * 177 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), 178 * also implies a change in the AID. 179 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed 180 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed 181 * @BSS_CHANGED_HT: 802.11n parameters changed 182 */ 183enum ieee80211_bss_change { 184 BSS_CHANGED_ASSOC = 1<<0, 185 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 186 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 187 BSS_CHANGED_HT = 1<<4, 188}; 189 190/** 191 * struct ieee80211_bss_conf - holds the BSS's changing parameters 192 * 193 * This structure keeps information about a BSS (and an association 194 * to that BSS) that can change during the lifetime of the BSS. 195 * 196 * @assoc: association status 197 * @aid: association ID number, valid only when @assoc is true 198 * @use_cts_prot: use CTS protection 199 * @use_short_preamble: use 802.11b short preamble 200 * @timestamp: beacon timestamp 201 * @beacon_int: beacon interval 202 * @assoc_capability: capabbilities taken from assoc resp 203 * @assoc_ht: association in HT mode 204 * @ht_conf: ht capabilities 205 * @ht_bss_conf: ht extended capabilities 206 */ 207struct ieee80211_bss_conf { 208 /* association related data */ 209 bool assoc; 210 u16 aid; 211 /* erp related data */ 212 bool use_cts_prot; 213 bool use_short_preamble; 214 u16 beacon_int; 215 u16 assoc_capability; 216 u64 timestamp; 217 /* ht related data */ 218 bool assoc_ht; 219 struct ieee80211_ht_info *ht_conf; 220 struct ieee80211_ht_bss_info *ht_bss_conf; 221}; 222 223/** 224 * enum mac80211_tx_control_flags - flags to describe Tx configuration for 225 * the Tx frame 226 * 227 * These flags are used with the @flags member of &ieee80211_tx_control 228 * 229 * @IEEE80211_TXCTL_REQ_TX_STATUS: request TX status callback for this frame. 230 * @IEEE80211_TXCTL_DO_NOT_ENCRYPT: send this frame without encryption; 231 * e.g., for EAPOL frame 232 * @IEEE80211_TXCTL_USE_RTS_CTS: use RTS-CTS before sending frame 233 * @IEEE80211_TXCTL_USE_CTS_PROTECT: use CTS protection for the frame (e.g., 234 * for combined 802.11g / 802.11b networks) 235 * @IEEE80211_TXCTL_NO_ACK: tell the low level not to wait for an ack 236 * @IEEE80211_TXCTL_RATE_CTRL_PROBE 237 * @EEE80211_TXCTL_CLEAR_PS_FILT: clear powersave filter 238 * for destination station 239 * @IEEE80211_TXCTL_REQUEUE: 240 * @IEEE80211_TXCTL_FIRST_FRAGMENT: this is a first fragment of the frame 241 * @IEEE80211_TXCTL_LONG_RETRY_LIMIT: this frame should be send using the 242 * through set_retry_limit configured long 243 * retry value 244 * @IEEE80211_TXCTL_EAPOL_FRAME: internal to mac80211 245 * @IEEE80211_TXCTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 246 * @IEEE80211_TXCTL_AMPDU: this frame should be sent as part of an A-MPDU 247 * @IEEE80211_TXCTL_OFDM_HT: this frame can be sent in HT OFDM rates. number 248 * of streams when this flag is on can be extracted 249 * from antenna_sel_tx, so if 1 antenna is marked 250 * use SISO, 2 antennas marked use MIMO, n antennas 251 * marked use MIMO_n. 252 * @IEEE80211_TXCTL_GREEN_FIELD: use green field protection for this frame 253 * @IEEE80211_TXCTL_40_MHZ_WIDTH: send this frame using 40 Mhz channel width 254 * @IEEE80211_TXCTL_DUP_DATA: duplicate data frame on both 20 Mhz channels 255 * @IEEE80211_TXCTL_SHORT_GI: send this frame using short guard interval 256 */ 257enum mac80211_tx_control_flags { 258 IEEE80211_TXCTL_REQ_TX_STATUS = (1<<0), 259 IEEE80211_TXCTL_DO_NOT_ENCRYPT = (1<<1), 260 IEEE80211_TXCTL_USE_RTS_CTS = (1<<2), 261 IEEE80211_TXCTL_USE_CTS_PROTECT = (1<<3), 262 IEEE80211_TXCTL_NO_ACK = (1<<4), 263 IEEE80211_TXCTL_RATE_CTRL_PROBE = (1<<5), 264 IEEE80211_TXCTL_CLEAR_PS_FILT = (1<<6), 265 IEEE80211_TXCTL_REQUEUE = (1<<7), 266 IEEE80211_TXCTL_FIRST_FRAGMENT = (1<<8), 267 IEEE80211_TXCTL_SHORT_PREAMBLE = (1<<9), 268 IEEE80211_TXCTL_LONG_RETRY_LIMIT = (1<<10), 269 IEEE80211_TXCTL_EAPOL_FRAME = (1<<11), 270 IEEE80211_TXCTL_SEND_AFTER_DTIM = (1<<12), 271 IEEE80211_TXCTL_AMPDU = (1<<13), 272 IEEE80211_TXCTL_OFDM_HT = (1<<14), 273 IEEE80211_TXCTL_GREEN_FIELD = (1<<15), 274 IEEE80211_TXCTL_40_MHZ_WIDTH = (1<<16), 275 IEEE80211_TXCTL_DUP_DATA = (1<<17), 276 IEEE80211_TXCTL_SHORT_GI = (1<<18), 277}; 278 279/* Transmit control fields. This data structure is passed to low-level driver 280 * with each TX frame. The low-level driver is responsible for configuring 281 * the hardware to use given values (depending on what is supported). */ 282 283struct ieee80211_tx_control { 284 struct ieee80211_vif *vif; 285 struct ieee80211_rate *tx_rate; 286 287 /* Transmit rate for RTS/CTS frame */ 288 struct ieee80211_rate *rts_cts_rate; 289 290 /* retry rate for the last retries */ 291 struct ieee80211_rate *alt_retry_rate; 292 293 u32 flags; /* tx control flags defined above */ 294 u8 key_idx; /* keyidx from hw->set_key(), undefined if 295 * IEEE80211_TXCTL_DO_NOT_ENCRYPT is set */ 296 u8 retry_limit; /* 1 = only first attempt, 2 = one retry, .. 297 * This could be used when set_retry_limit 298 * is not implemented by the driver */ 299 u8 antenna_sel_tx; /* 0 = default/diversity, otherwise bit 300 * position represents antenna number used */ 301 u8 icv_len; /* length of the ICV/MIC field in octets */ 302 u8 iv_len; /* length of the IV field in octets */ 303 u8 queue; /* hardware queue to use for this frame; 304 * 0 = highest, hw->queues-1 = lowest */ 305 int type; /* internal */ 306}; 307 308 309/** 310 * enum mac80211_rx_flags - receive flags 311 * 312 * These flags are used with the @flag member of &struct ieee80211_rx_status. 313 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 314 * Use together with %RX_FLAG_MMIC_STRIPPED. 315 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 316 * @RX_FLAG_RADIOTAP: This frame starts with a radiotap header. 317 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 318 * verification has been done by the hardware. 319 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 320 * If this flag is set, the stack cannot do any replay detection 321 * hence the driver or hardware will have to do that. 322 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 323 * the frame. 324 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 325 * the frame. 326 * @RX_FLAG_TSFT: The timestamp passed in the RX status (@mactime field) 327 * is valid. This is useful in monitor mode and necessary for beacon frames 328 * to enable IBSS merging. 329 */ 330enum mac80211_rx_flags { 331 RX_FLAG_MMIC_ERROR = 1<<0, 332 RX_FLAG_DECRYPTED = 1<<1, 333 RX_FLAG_RADIOTAP = 1<<2, 334 RX_FLAG_MMIC_STRIPPED = 1<<3, 335 RX_FLAG_IV_STRIPPED = 1<<4, 336 RX_FLAG_FAILED_FCS_CRC = 1<<5, 337 RX_FLAG_FAILED_PLCP_CRC = 1<<6, 338 RX_FLAG_TSFT = 1<<7, 339}; 340 341/** 342 * struct ieee80211_rx_status - receive status 343 * 344 * The low-level driver should provide this information (the subset 345 * supported by hardware) to the 802.11 code with each received 346 * frame. 347 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 348 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 349 * @band: the active band when this frame was received 350 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 351 * @ssi: signal strength when receiving this frame 352 * @signal: used as 'qual' in statistics reporting 353 * @noise: PHY noise when receiving this frame 354 * @antenna: antenna used 355 * @rate_idx: index of data rate into band's supported rates 356 * @flag: %RX_FLAG_* 357 */ 358struct ieee80211_rx_status { 359 u64 mactime; 360 enum ieee80211_band band; 361 int freq; 362 int ssi; 363 int signal; 364 int noise; 365 int antenna; 366 int rate_idx; 367 int flag; 368}; 369 370/** 371 * enum ieee80211_tx_status_flags - transmit status flags 372 * 373 * Status flags to indicate various transmit conditions. 374 * 375 * @IEEE80211_TX_STATUS_TX_FILTERED: The frame was not transmitted 376 * because the destination STA was in powersave mode. 377 * @IEEE80211_TX_STATUS_ACK: Frame was acknowledged 378 * @IEEE80211_TX_STATUS_AMPDU: The frame was aggregated, so status 379 * is for the whole aggregation. 380 */ 381enum ieee80211_tx_status_flags { 382 IEEE80211_TX_STATUS_TX_FILTERED = 1<<0, 383 IEEE80211_TX_STATUS_ACK = 1<<1, 384 IEEE80211_TX_STATUS_AMPDU = 1<<2, 385}; 386 387/** 388 * struct ieee80211_tx_status - transmit status 389 * 390 * As much information as possible should be provided for each transmitted 391 * frame with ieee80211_tx_status(). 392 * 393 * @control: a copy of the &struct ieee80211_tx_control passed to the driver 394 * in the tx() callback. 395 * @flags: transmit status flags, defined above 396 * @retry_count: number of retries 397 * @excessive_retries: set to 1 if the frame was retried many times 398 * but not acknowledged 399 * @ampdu_ack_len: number of aggregated frames. 400 * relevant only if IEEE80211_TX_STATUS_AMPDU was set. 401 * @ampdu_ack_map: block ack bit map for the aggregation. 402 * relevant only if IEEE80211_TX_STATUS_AMPDU was set. 403 * @ack_signal: signal strength of the ACK frame 404 * @queue_length: ?? REMOVE 405 * @queue_number: ?? REMOVE 406 */ 407struct ieee80211_tx_status { 408 struct ieee80211_tx_control control; 409 u8 flags; 410 u8 retry_count; 411 bool excessive_retries; 412 u8 ampdu_ack_len; 413 u64 ampdu_ack_map; 414 int ack_signal; 415 int queue_length; 416 int queue_number; 417}; 418 419/** 420 * enum ieee80211_conf_flags - configuration flags 421 * 422 * Flags to define PHY configuration options 423 * 424 * @IEEE80211_CONF_SHORT_SLOT_TIME: use 802.11g short slot time 425 * @IEEE80211_CONF_RADIOTAP: add radiotap header at receive time (if supported) 426 * @IEEE80211_CONF_SUPPORT_HT_MODE: use 802.11n HT capabilities (if supported) 427 */ 428enum ieee80211_conf_flags { 429 IEEE80211_CONF_SHORT_SLOT_TIME = (1<<0), 430 IEEE80211_CONF_RADIOTAP = (1<<1), 431 IEEE80211_CONF_SUPPORT_HT_MODE = (1<<2), 432}; 433 434/** 435 * struct ieee80211_conf - configuration of the device 436 * 437 * This struct indicates how the driver shall configure the hardware. 438 * 439 * @radio_enabled: when zero, driver is required to switch off the radio. 440 * TODO make a flag 441 * @beacon_int: beacon interval (TODO make interface config) 442 * @flags: configuration flags defined above 443 * @power_level: requested transmit power (in dBm) 444 * @max_antenna_gain: maximum antenna gain (in dBi) 445 * @antenna_sel_tx: transmit antenna selection, 0: default/diversity, 446 * 1/2: antenna 0/1 447 * @antenna_sel_rx: receive antenna selection, like @antenna_sel_tx 448 * @ht_conf: describes current self configuration of 802.11n HT capabilies 449 * @ht_bss_conf: describes current BSS configuration of 802.11n HT parameters 450 * @channel: the channel to tune to 451 */ 452struct ieee80211_conf { 453 int radio_enabled; 454 455 int beacon_int; 456 u32 flags; 457 int power_level; 458 int max_antenna_gain; 459 u8 antenna_sel_tx; 460 u8 antenna_sel_rx; 461 462 struct ieee80211_channel *channel; 463 464 struct ieee80211_ht_info ht_conf; 465 struct ieee80211_ht_bss_info ht_bss_conf; 466}; 467 468/** 469 * enum ieee80211_if_types - types of 802.11 network interfaces 470 * 471 * @IEEE80211_IF_TYPE_INVALID: invalid interface type, not used 472 * by mac80211 itself 473 * @IEEE80211_IF_TYPE_AP: interface in AP mode. 474 * @IEEE80211_IF_TYPE_MGMT: special interface for communication with hostap 475 * daemon. Drivers should never see this type. 476 * @IEEE80211_IF_TYPE_STA: interface in STA (client) mode. 477 * @IEEE80211_IF_TYPE_IBSS: interface in IBSS (ad-hoc) mode. 478 * @IEEE80211_IF_TYPE_MNTR: interface in monitor (rfmon) mode. 479 * @IEEE80211_IF_TYPE_WDS: interface in WDS mode. 480 * @IEEE80211_IF_TYPE_VLAN: VLAN interface bound to an AP, drivers 481 * will never see this type. 482 * @IEEE80211_IF_TYPE_MESH_POINT: 802.11s mesh point 483 */ 484enum ieee80211_if_types { 485 IEEE80211_IF_TYPE_INVALID, 486 IEEE80211_IF_TYPE_AP, 487 IEEE80211_IF_TYPE_STA, 488 IEEE80211_IF_TYPE_IBSS, 489 IEEE80211_IF_TYPE_MESH_POINT, 490 IEEE80211_IF_TYPE_MNTR, 491 IEEE80211_IF_TYPE_WDS, 492 IEEE80211_IF_TYPE_VLAN, 493}; 494 495/** 496 * struct ieee80211_vif - per-interface data 497 * 498 * Data in this structure is continually present for driver 499 * use during the life of a virtual interface. 500 * 501 * @type: type of this virtual interface 502 * @drv_priv: data area for driver use, will always be aligned to 503 * sizeof(void *). 504 */ 505struct ieee80211_vif { 506 enum ieee80211_if_types type; 507 /* must be last */ 508 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 509}; 510 511static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 512{ 513#ifdef CONFIG_MAC80211_MESH 514 return vif->type == IEEE80211_IF_TYPE_MESH_POINT; 515#endif 516 return false; 517} 518 519/** 520 * struct ieee80211_if_init_conf - initial configuration of an interface 521 * 522 * @vif: pointer to a driver-use per-interface structure. The pointer 523 * itself is also used for various functions including 524 * ieee80211_beacon_get() and ieee80211_get_buffered_bc(). 525 * @type: one of &enum ieee80211_if_types constants. Determines the type of 526 * added/removed interface. 527 * @mac_addr: pointer to MAC address of the interface. This pointer is valid 528 * until the interface is removed (i.e. it cannot be used after 529 * remove_interface() callback was called for this interface). 530 * 531 * This structure is used in add_interface() and remove_interface() 532 * callbacks of &struct ieee80211_hw. 533 * 534 * When you allow multiple interfaces to be added to your PHY, take care 535 * that the hardware can actually handle multiple MAC addresses. However, 536 * also take care that when there's no interface left with mac_addr != %NULL 537 * you remove the MAC address from the device to avoid acknowledging packets 538 * in pure monitor mode. 539 */ 540struct ieee80211_if_init_conf { 541 enum ieee80211_if_types type; 542 struct ieee80211_vif *vif; 543 void *mac_addr; 544}; 545 546/** 547 * struct ieee80211_if_conf - configuration of an interface 548 * 549 * @type: type of the interface. This is always the same as was specified in 550 * &struct ieee80211_if_init_conf. The type of an interface never changes 551 * during the life of the interface; this field is present only for 552 * convenience. 553 * @bssid: BSSID of the network we are associated to/creating. 554 * @ssid: used (together with @ssid_len) by drivers for hardware that 555 * generate beacons independently. The pointer is valid only during the 556 * config_interface() call, so copy the value somewhere if you need 557 * it. 558 * @ssid_len: length of the @ssid field. 559 * @beacon: beacon template. Valid only if @host_gen_beacon_template in 560 * &struct ieee80211_hw is set. The driver is responsible of freeing 561 * the sk_buff. 562 * @beacon_control: tx_control for the beacon template, this field is only 563 * valid when the @beacon field was set. 564 * 565 * This structure is passed to the config_interface() callback of 566 * &struct ieee80211_hw. 567 */ 568struct ieee80211_if_conf { 569 int type; 570 u8 *bssid; 571 u8 *ssid; 572 size_t ssid_len; 573 struct sk_buff *beacon; 574 struct ieee80211_tx_control *beacon_control; 575}; 576 577/** 578 * enum ieee80211_key_alg - key algorithm 579 * @ALG_WEP: WEP40 or WEP104 580 * @ALG_TKIP: TKIP 581 * @ALG_CCMP: CCMP (AES) 582 */ 583enum ieee80211_key_alg { 584 ALG_WEP, 585 ALG_TKIP, 586 ALG_CCMP, 587}; 588 589 590/** 591 * enum ieee80211_key_flags - key flags 592 * 593 * These flags are used for communication about keys between the driver 594 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 595 * 596 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 597 * that the STA this key will be used with could be using QoS. 598 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 599 * driver to indicate that it requires IV generation for this 600 * particular key. 601 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 602 * the driver for a TKIP key if it requires Michael MIC 603 * generation in software. 604 */ 605enum ieee80211_key_flags { 606 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 607 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 608 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 609}; 610 611/** 612 * struct ieee80211_key_conf - key information 613 * 614 * This key information is given by mac80211 to the driver by 615 * the set_key() callback in &struct ieee80211_ops. 616 * 617 * @hw_key_idx: To be set by the driver, this is the key index the driver 618 * wants to be given when a frame is transmitted and needs to be 619 * encrypted in hardware. 620 * @alg: The key algorithm. 621 * @flags: key flags, see &enum ieee80211_key_flags. 622 * @keyidx: the key index (0-3) 623 * @keylen: key material length 624 * @key: key material 625 */ 626struct ieee80211_key_conf { 627 enum ieee80211_key_alg alg; 628 u8 hw_key_idx; 629 u8 flags; 630 s8 keyidx; 631 u8 keylen; 632 u8 key[0]; 633}; 634 635/** 636 * enum set_key_cmd - key command 637 * 638 * Used with the set_key() callback in &struct ieee80211_ops, this 639 * indicates whether a key is being removed or added. 640 * 641 * @SET_KEY: a key is set 642 * @DISABLE_KEY: a key must be disabled 643 */ 644enum set_key_cmd { 645 SET_KEY, DISABLE_KEY, 646}; 647 648/** 649 * enum sta_notify_cmd - sta notify command 650 * 651 * Used with the sta_notify() callback in &struct ieee80211_ops, this 652 * indicates addition and removal of a station to station table 653 * 654 * @STA_NOTIFY_ADD: a station was added to the station table 655 * @STA_NOTIFY_REMOVE: a station being removed from the station table 656 */ 657enum sta_notify_cmd { 658 STA_NOTIFY_ADD, STA_NOTIFY_REMOVE 659}; 660 661/** 662 * enum ieee80211_tkip_key_type - get tkip key 663 * 664 * Used by drivers which need to get a tkip key for skb. Some drivers need a 665 * phase 1 key, others need a phase 2 key. A single function allows the driver 666 * to get the key, this enum indicates what type of key is required. 667 * 668 * @IEEE80211_TKIP_P1_KEY: the driver needs a phase 1 key 669 * @IEEE80211_TKIP_P2_KEY: the driver needs a phase 2 key 670 */ 671enum ieee80211_tkip_key_type { 672 IEEE80211_TKIP_P1_KEY, 673 IEEE80211_TKIP_P2_KEY, 674}; 675 676/** 677 * enum ieee80211_hw_flags - hardware flags 678 * 679 * These flags are used to indicate hardware capabilities to 680 * the stack. Generally, flags here should have their meaning 681 * done in a way that the simplest hardware doesn't need setting 682 * any particular flags. There are some exceptions to this rule, 683 * however, so you are advised to review these flags carefully. 684 * 685 * @IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE: 686 * The device only needs to be supplied with a beacon template. 687 * If you need the host to generate each beacon then don't use 688 * this flag and call ieee80211_beacon_get() when you need the 689 * next beacon frame. Note that if you set this flag, you must 690 * implement the set_tim() callback for powersave mode to work 691 * properly. 692 * This flag is only relevant for access-point mode. 693 * 694 * @IEEE80211_HW_RX_INCLUDES_FCS: 695 * Indicates that received frames passed to the stack include 696 * the FCS at the end. 697 * 698 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 699 * Some wireless LAN chipsets buffer broadcast/multicast frames 700 * for power saving stations in the hardware/firmware and others 701 * rely on the host system for such buffering. This option is used 702 * to configure the IEEE 802.11 upper layer to buffer broadcast and 703 * multicast frames when there are power saving stations so that 704 * the driver can fetch them with ieee80211_get_buffered_bc(). Note 705 * that not setting this flag works properly only when the 706 * %IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE is also not set because 707 * otherwise the stack will not know when the DTIM beacon was sent. 708 * 709 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 710 * Hardware is not capable of short slot operation on the 2.4 GHz band. 711 * 712 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 713 * Hardware is not capable of receiving frames with short preamble on 714 * the 2.4 GHz band. 715 */ 716enum ieee80211_hw_flags { 717 IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE = 1<<0, 718 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 719 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 720 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 721 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 722}; 723 724/** 725 * struct ieee80211_hw - hardware information and state 726 * 727 * This structure contains the configuration and hardware 728 * information for an 802.11 PHY. 729 * 730 * @wiphy: This points to the &struct wiphy allocated for this 731 * 802.11 PHY. You must fill in the @perm_addr and @dev 732 * members of this structure using SET_IEEE80211_DEV() 733 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 734 * bands (with channels, bitrates) are registered here. 735 * 736 * @conf: &struct ieee80211_conf, device configuration, don't use. 737 * 738 * @workqueue: single threaded workqueue available for driver use, 739 * allocated by mac80211 on registration and flushed on 740 * unregistration. 741 * 742 * @priv: pointer to private area that was allocated for driver use 743 * along with this structure. 744 * 745 * @flags: hardware flags, see &enum ieee80211_hw_flags. 746 * 747 * @extra_tx_headroom: headroom to reserve in each transmit skb 748 * for use by the driver (e.g. for transmit headers.) 749 * 750 * @channel_change_time: time (in microseconds) it takes to change channels. 751 * 752 * @max_rssi: Maximum value for ssi in RX information, use 753 * negative numbers for dBm and 0 to indicate no support. 754 * 755 * @max_signal: like @max_rssi, but for the signal value. 756 * 757 * @max_noise: like @max_rssi, but for the noise value. 758 * 759 * @queues: number of available hardware transmit queues for 760 * data packets. WMM/QoS requires at least four. 761 * 762 * @rate_control_algorithm: rate control algorithm for this hardware. 763 * If unset (NULL), the default algorithm will be used. Must be 764 * set before calling ieee80211_register_hw(). 765 * 766 * @vif_data_size: size (in bytes) of the drv_priv data area 767 * within &struct ieee80211_vif. 768 */ 769struct ieee80211_hw { 770 struct ieee80211_conf conf; 771 struct wiphy *wiphy; 772 struct workqueue_struct *workqueue; 773 const char *rate_control_algorithm; 774 void *priv; 775 u32 flags; 776 unsigned int extra_tx_headroom; 777 int channel_change_time; 778 int vif_data_size; 779 u8 queues; 780 s8 max_rssi; 781 s8 max_signal; 782 s8 max_noise; 783}; 784 785/** 786 * SET_IEEE80211_DEV - set device for 802.11 hardware 787 * 788 * @hw: the &struct ieee80211_hw to set the device for 789 * @dev: the &struct device of this 802.11 device 790 */ 791static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 792{ 793 set_wiphy_dev(hw->wiphy, dev); 794} 795 796/** 797 * SET_IEEE80211_PERM_ADDR - set the permanenet MAC address for 802.11 hardware 798 * 799 * @hw: the &struct ieee80211_hw to set the MAC address for 800 * @addr: the address to set 801 */ 802static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 803{ 804 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 805} 806 807/** 808 * DOC: Hardware crypto acceleration 809 * 810 * mac80211 is capable of taking advantage of many hardware 811 * acceleration designs for encryption and decryption operations. 812 * 813 * The set_key() callback in the &struct ieee80211_ops for a given 814 * device is called to enable hardware acceleration of encryption and 815 * decryption. The callback takes an @address parameter that will be 816 * the broadcast address for default keys, the other station's hardware 817 * address for individual keys or the zero address for keys that will 818 * be used only for transmission. 819 * Multiple transmission keys with the same key index may be used when 820 * VLANs are configured for an access point. 821 * 822 * The @local_address parameter will always be set to our own address, 823 * this is only relevant if you support multiple local addresses. 824 * 825 * When transmitting, the TX control data will use the @hw_key_idx 826 * selected by the driver by modifying the &struct ieee80211_key_conf 827 * pointed to by the @key parameter to the set_key() function. 828 * 829 * The set_key() call for the %SET_KEY command should return 0 if 830 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 831 * added; if you return 0 then hw_key_idx must be assigned to the 832 * hardware key index, you are free to use the full u8 range. 833 * 834 * When the cmd is %DISABLE_KEY then it must succeed. 835 * 836 * Note that it is permissible to not decrypt a frame even if a key 837 * for it has been uploaded to hardware, the stack will not make any 838 * decision based on whether a key has been uploaded or not but rather 839 * based on the receive flags. 840 * 841 * The &struct ieee80211_key_conf structure pointed to by the @key 842 * parameter is guaranteed to be valid until another call to set_key() 843 * removes it, but it can only be used as a cookie to differentiate 844 * keys. 845 * 846 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 847 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 848 * handler. 849 * The update_tkip_key() call updates the driver with the new phase 1 key. 850 * This happens everytime the iv16 wraps around (every 65536 packets). The 851 * set_key() call will happen only once for each key (unless the AP did 852 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 853 * provided by udpate_tkip_key only. The trigger that makes mac80211 call this 854 * handler is software decryption with wrap around of iv16. 855 */ 856 857/** 858 * DOC: Frame filtering 859 * 860 * mac80211 requires to see many management frames for proper 861 * operation, and users may want to see many more frames when 862 * in monitor mode. However, for best CPU usage and power consumption, 863 * having as few frames as possible percolate through the stack is 864 * desirable. Hence, the hardware should filter as much as possible. 865 * 866 * To achieve this, mac80211 uses filter flags (see below) to tell 867 * the driver's configure_filter() function which frames should be 868 * passed to mac80211 and which should be filtered out. 869 * 870 * The configure_filter() callback is invoked with the parameters 871 * @mc_count and @mc_list for the combined multicast address list 872 * of all virtual interfaces, @changed_flags telling which flags 873 * were changed and @total_flags with the new flag states. 874 * 875 * If your device has no multicast address filters your driver will 876 * need to check both the %FIF_ALLMULTI flag and the @mc_count 877 * parameter to see whether multicast frames should be accepted 878 * or dropped. 879 * 880 * All unsupported flags in @total_flags must be cleared. 881 * Hardware does not support a flag if it is incapable of _passing_ 882 * the frame to the stack. Otherwise the driver must ignore 883 * the flag, but not clear it. 884 * You must _only_ clear the flag (announce no support for the 885 * flag to mac80211) if you are not able to pass the packet type 886 * to the stack (so the hardware always filters it). 887 * So for example, you should clear @FIF_CONTROL, if your hardware 888 * always filters control frames. If your hardware always passes 889 * control frames to the kernel and is incapable of filtering them, 890 * you do _not_ clear the @FIF_CONTROL flag. 891 * This rule applies to all other FIF flags as well. 892 */ 893 894/** 895 * enum ieee80211_filter_flags - hardware filter flags 896 * 897 * These flags determine what the filter in hardware should be 898 * programmed to let through and what should not be passed to the 899 * stack. It is always safe to pass more frames than requested, 900 * but this has negative impact on power consumption. 901 * 902 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 903 * think of the BSS as your network segment and then this corresponds 904 * to the regular ethernet device promiscuous mode. 905 * 906 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 907 * by the user or if the hardware is not capable of filtering by 908 * multicast address. 909 * 910 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 911 * %RX_FLAG_FAILED_FCS_CRC for them) 912 * 913 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 914 * the %RX_FLAG_FAILED_PLCP_CRC for them 915 * 916 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 917 * to the hardware that it should not filter beacons or probe responses 918 * by BSSID. Filtering them can greatly reduce the amount of processing 919 * mac80211 needs to do and the amount of CPU wakeups, so you should 920 * honour this flag if possible. 921 * 922 * @FIF_CONTROL: pass control frames, if PROMISC_IN_BSS is not set then 923 * only those addressed to this station 924 * 925 * @FIF_OTHER_BSS: pass frames destined to other BSSes 926 */ 927enum ieee80211_filter_flags { 928 FIF_PROMISC_IN_BSS = 1<<0, 929 FIF_ALLMULTI = 1<<1, 930 FIF_FCSFAIL = 1<<2, 931 FIF_PLCPFAIL = 1<<3, 932 FIF_BCN_PRBRESP_PROMISC = 1<<4, 933 FIF_CONTROL = 1<<5, 934 FIF_OTHER_BSS = 1<<6, 935}; 936 937/** 938 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 939 * 940 * These flags are used with the ampdu_action() callback in 941 * &struct ieee80211_ops to indicate which action is needed. 942 * @IEEE80211_AMPDU_RX_START: start Rx aggregation 943 * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation 944 * @IEEE80211_AMPDU_TX_START: start Tx aggregation 945 * @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation 946 */ 947enum ieee80211_ampdu_mlme_action { 948 IEEE80211_AMPDU_RX_START, 949 IEEE80211_AMPDU_RX_STOP, 950 IEEE80211_AMPDU_TX_START, 951 IEEE80211_AMPDU_TX_STOP, 952}; 953 954/** 955 * struct ieee80211_ops - callbacks from mac80211 to the driver 956 * 957 * This structure contains various callbacks that the driver may 958 * handle or, in some cases, must handle, for example to configure 959 * the hardware to a new channel or to transmit a frame. 960 * 961 * @tx: Handler that 802.11 module calls for each transmitted frame. 962 * skb contains the buffer starting from the IEEE 802.11 header. 963 * The low-level driver should send the frame out based on 964 * configuration in the TX control data. Must be implemented and 965 * atomic. 966 * 967 * @start: Called before the first netdevice attached to the hardware 968 * is enabled. This should turn on the hardware and must turn on 969 * frame reception (for possibly enabled monitor interfaces.) 970 * Returns negative error codes, these may be seen in userspace, 971 * or zero. 972 * When the device is started it should not have a MAC address 973 * to avoid acknowledging frames before a non-monitor device 974 * is added. 975 * Must be implemented. 976 * 977 * @stop: Called after last netdevice attached to the hardware 978 * is disabled. This should turn off the hardware (at least 979 * it must turn off frame reception.) 980 * May be called right after add_interface if that rejects 981 * an interface. 982 * Must be implemented. 983 * 984 * @add_interface: Called when a netdevice attached to the hardware is 985 * enabled. Because it is not called for monitor mode devices, @open 986 * and @stop must be implemented. 987 * The driver should perform any initialization it needs before 988 * the device can be enabled. The initial configuration for the 989 * interface is given in the conf parameter. 990 * The callback may refuse to add an interface by returning a 991 * negative error code (which will be seen in userspace.) 992 * Must be implemented. 993 * 994 * @remove_interface: Notifies a driver that an interface is going down. 995 * The @stop callback is called after this if it is the last interface 996 * and no monitor interfaces are present. 997 * When all interfaces are removed, the MAC address in the hardware 998 * must be cleared so the device no longer acknowledges packets, 999 * the mac_addr member of the conf structure is, however, set to the 1000 * MAC address of the device going away. 1001 * Hence, this callback must be implemented. 1002 * 1003 * @config: Handler for configuration requests. IEEE 802.11 code calls this 1004 * function to change hardware configuration, e.g., channel. 1005 * 1006 * @config_interface: Handler for configuration requests related to interfaces 1007 * (e.g. BSSID changes.) 1008 * 1009 * @bss_info_changed: Handler for configuration requests related to BSS 1010 * parameters that may vary during BSS's lifespan, and may affect low 1011 * level driver (e.g. assoc/disassoc status, erp parameters). 1012 * This function should not be used if no BSS has been set, unless 1013 * for association indication. The @changed parameter indicates which 1014 * of the bss parameters has changed when a call is made. This callback 1015 * has to be atomic. 1016 * 1017 * @configure_filter: Configure the device's RX filter. 1018 * See the section "Frame filtering" for more information. 1019 * This callback must be implemented and atomic. 1020 * 1021 * @set_tim: Set TIM bit. If the hardware/firmware takes care of beacon 1022 * generation (that is, %IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE is set) 1023 * mac80211 calls this function when a TIM bit must be set or cleared 1024 * for a given AID. Must be atomic. 1025 * 1026 * @set_key: See the section "Hardware crypto acceleration" 1027 * This callback can sleep, and is only called between add_interface 1028 * and remove_interface calls, i.e. while the interface with the 1029 * given local_address is enabled. 1030 * 1031 * @update_tkip_key: See the section "Hardware crypto acceleration" 1032 * This callback will be called in the context of Rx. Called for drivers 1033 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 1034 * 1035 * @hw_scan: Ask the hardware to service the scan request, no need to start 1036 * the scan state machine in stack. The scan must honour the channel 1037 * configuration done by the regulatory agent in the wiphy's registered 1038 * bands. 1039 * 1040 * @get_stats: return low-level statistics 1041 * 1042 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 1043 * callback should be provided to read the TKIP transmit IVs (both IV32 1044 * and IV16) for the given key from hardware. 1045 * 1046 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 1047 * 1048 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this if 1049 * the device does fragmentation by itself; if this method is assigned then 1050 * the stack will not do fragmentation. 1051 * 1052 * @set_retry_limit: Configuration of retry limits (if device needs it) 1053 * 1054 * @sta_notify: Notifies low level driver about addition or removal 1055 * of assocaited station or AP. 1056 * 1057 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 1058 * bursting) for a hardware TX queue. The @queue parameter uses the 1059 * %IEEE80211_TX_QUEUE_* constants. Must be atomic. 1060 * 1061 * @get_tx_stats: Get statistics of the current TX queue status. This is used 1062 * to get number of currently queued packets (queue length), maximum queue 1063 * size (limit), and total number of packets sent using each TX queue 1064 * (count). This information is used for WMM to find out which TX 1065 * queues have room for more packets and by hostapd to provide 1066 * statistics about the current queueing state to external programs. 1067 * 1068 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 1069 * this is only used for IBSS mode debugging and, as such, is not a 1070 * required function. Must be atomic. 1071 * 1072 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 1073 * with other STAs in the IBSS. This is only used in IBSS mode. This 1074 * function is optional if the firmware/hardware takes full care of 1075 * TSF synchronization. 1076 * 1077 * @beacon_update: Setup beacon data for IBSS beacons. Unlike access point, 1078 * IBSS uses a fixed beacon frame which is configured using this 1079 * function. 1080 * If the driver returns success (0) from this callback, it owns 1081 * the skb. That means the driver is responsible to kfree_skb() it. 1082 * The control structure is not dynamically allocated. That means the 1083 * driver does not own the pointer and if it needs it somewhere 1084 * outside of the context of this function, it must copy it 1085 * somewhere else. 1086 * This handler is required only for IBSS mode. 1087 * 1088 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 1089 * This is needed only for IBSS mode and the result of this function is 1090 * used to determine whether to reply to Probe Requests. 1091 * 1092 * @conf_ht: Configures low level driver with 802.11n HT data. Must be atomic. 1093 * 1094 * @ampdu_action: Perform a certain A-MPDU action 1095 * The RA/TID combination determines the destination and TID we want 1096 * the ampdu action to be performed for. The action is defined through 1097 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 1098 * is the first frame we expect to perform the action on. notice 1099 * that TX/RX_STOP can pass NULL for this parameter. 1100 */ 1101struct ieee80211_ops { 1102 int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb, 1103 struct ieee80211_tx_control *control); 1104 int (*start)(struct ieee80211_hw *hw); 1105 void (*stop)(struct ieee80211_hw *hw); 1106 int (*add_interface)(struct ieee80211_hw *hw, 1107 struct ieee80211_if_init_conf *conf); 1108 void (*remove_interface)(struct ieee80211_hw *hw, 1109 struct ieee80211_if_init_conf *conf); 1110 int (*config)(struct ieee80211_hw *hw, struct ieee80211_conf *conf); 1111 int (*config_interface)(struct ieee80211_hw *hw, 1112 struct ieee80211_vif *vif, 1113 struct ieee80211_if_conf *conf); 1114 void (*bss_info_changed)(struct ieee80211_hw *hw, 1115 struct ieee80211_vif *vif, 1116 struct ieee80211_bss_conf *info, 1117 u32 changed); 1118 void (*configure_filter)(struct ieee80211_hw *hw, 1119 unsigned int changed_flags, 1120 unsigned int *total_flags, 1121 int mc_count, struct dev_addr_list *mc_list); 1122 int (*set_tim)(struct ieee80211_hw *hw, int aid, int set); 1123 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 1124 const u8 *local_address, const u8 *address, 1125 struct ieee80211_key_conf *key); 1126 void (*update_tkip_key)(struct ieee80211_hw *hw, 1127 struct ieee80211_key_conf *conf, const u8 *address, 1128 u32 iv32, u16 *phase1key); 1129 int (*hw_scan)(struct ieee80211_hw *hw, u8 *ssid, size_t len); 1130 int (*get_stats)(struct ieee80211_hw *hw, 1131 struct ieee80211_low_level_stats *stats); 1132 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 1133 u32 *iv32, u16 *iv16); 1134 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 1135 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 1136 int (*set_retry_limit)(struct ieee80211_hw *hw, 1137 u32 short_retry, u32 long_retr); 1138 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1139 enum sta_notify_cmd, const u8 *addr); 1140 int (*conf_tx)(struct ieee80211_hw *hw, int queue, 1141 const struct ieee80211_tx_queue_params *params); 1142 int (*get_tx_stats)(struct ieee80211_hw *hw, 1143 struct ieee80211_tx_queue_stats *stats); 1144 u64 (*get_tsf)(struct ieee80211_hw *hw); 1145 void (*reset_tsf)(struct ieee80211_hw *hw); 1146 int (*beacon_update)(struct ieee80211_hw *hw, 1147 struct sk_buff *skb, 1148 struct ieee80211_tx_control *control); 1149 int (*tx_last_beacon)(struct ieee80211_hw *hw); 1150 int (*ampdu_action)(struct ieee80211_hw *hw, 1151 enum ieee80211_ampdu_mlme_action action, 1152 const u8 *addr, u16 tid, u16 *ssn); 1153}; 1154 1155/** 1156 * ieee80211_alloc_hw - Allocate a new hardware device 1157 * 1158 * This must be called once for each hardware device. The returned pointer 1159 * must be used to refer to this device when calling other functions. 1160 * mac80211 allocates a private data area for the driver pointed to by 1161 * @priv in &struct ieee80211_hw, the size of this area is given as 1162 * @priv_data_len. 1163 * 1164 * @priv_data_len: length of private data 1165 * @ops: callbacks for this device 1166 */ 1167struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 1168 const struct ieee80211_ops *ops); 1169 1170/** 1171 * ieee80211_register_hw - Register hardware device 1172 * 1173 * You must call this function before any other functions in 1174 * mac80211. Note that before a hardware can be registered, you 1175 * need to fill the contained wiphy's information. 1176 * 1177 * @hw: the device to register as returned by ieee80211_alloc_hw() 1178 */ 1179int ieee80211_register_hw(struct ieee80211_hw *hw); 1180 1181#ifdef CONFIG_MAC80211_LEDS 1182extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 1183extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 1184extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 1185extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 1186#endif 1187/** 1188 * ieee80211_get_tx_led_name - get name of TX LED 1189 * 1190 * mac80211 creates a transmit LED trigger for each wireless hardware 1191 * that can be used to drive LEDs if your driver registers a LED device. 1192 * This function returns the name (or %NULL if not configured for LEDs) 1193 * of the trigger so you can automatically link the LED device. 1194 * 1195 * @hw: the hardware to get the LED trigger name for 1196 */ 1197static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 1198{ 1199#ifdef CONFIG_MAC80211_LEDS 1200 return __ieee80211_get_tx_led_name(hw); 1201#else 1202 return NULL; 1203#endif 1204} 1205 1206/** 1207 * ieee80211_get_rx_led_name - get name of RX LED 1208 * 1209 * mac80211 creates a receive LED trigger for each wireless hardware 1210 * that can be used to drive LEDs if your driver registers a LED device. 1211 * This function returns the name (or %NULL if not configured for LEDs) 1212 * of the trigger so you can automatically link the LED device. 1213 * 1214 * @hw: the hardware to get the LED trigger name for 1215 */ 1216static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 1217{ 1218#ifdef CONFIG_MAC80211_LEDS 1219 return __ieee80211_get_rx_led_name(hw); 1220#else 1221 return NULL; 1222#endif 1223} 1224 1225/** 1226 * ieee80211_get_assoc_led_name - get name of association LED 1227 * 1228 * mac80211 creates a association LED trigger for each wireless hardware 1229 * that can be used to drive LEDs if your driver registers a LED device. 1230 * This function returns the name (or %NULL if not configured for LEDs) 1231 * of the trigger so you can automatically link the LED device. 1232 * 1233 * @hw: the hardware to get the LED trigger name for 1234 */ 1235static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 1236{ 1237#ifdef CONFIG_MAC80211_LEDS 1238 return __ieee80211_get_assoc_led_name(hw); 1239#else 1240 return NULL; 1241#endif 1242} 1243 1244/** 1245 * ieee80211_get_radio_led_name - get name of radio LED 1246 * 1247 * mac80211 creates a radio change LED trigger for each wireless hardware 1248 * that can be used to drive LEDs if your driver registers a LED device. 1249 * This function returns the name (or %NULL if not configured for LEDs) 1250 * of the trigger so you can automatically link the LED device. 1251 * 1252 * @hw: the hardware to get the LED trigger name for 1253 */ 1254static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 1255{ 1256#ifdef CONFIG_MAC80211_LEDS 1257 return __ieee80211_get_radio_led_name(hw); 1258#else 1259 return NULL; 1260#endif 1261} 1262 1263/** 1264 * ieee80211_unregister_hw - Unregister a hardware device 1265 * 1266 * This function instructs mac80211 to free allocated resources 1267 * and unregister netdevices from the networking subsystem. 1268 * 1269 * @hw: the hardware to unregister 1270 */ 1271void ieee80211_unregister_hw(struct ieee80211_hw *hw); 1272 1273/** 1274 * ieee80211_free_hw - free hardware descriptor 1275 * 1276 * This function frees everything that was allocated, including the 1277 * private data for the driver. You must call ieee80211_unregister_hw() 1278 * before calling this function 1279 * 1280 * @hw: the hardware to free 1281 */ 1282void ieee80211_free_hw(struct ieee80211_hw *hw); 1283 1284/* trick to avoid symbol clashes with the ieee80211 subsystem */ 1285void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, 1286 struct ieee80211_rx_status *status); 1287 1288/** 1289 * ieee80211_rx - receive frame 1290 * 1291 * Use this function to hand received frames to mac80211. The receive 1292 * buffer in @skb must start with an IEEE 802.11 header or a radiotap 1293 * header if %RX_FLAG_RADIOTAP is set in the @status flags. 1294 * 1295 * This function may not be called in IRQ context. Calls to this function 1296 * for a single hardware must be synchronized against each other. Calls 1297 * to this function and ieee80211_rx_irqsafe() may not be mixed for a 1298 * single hardware. 1299 * 1300 * @hw: the hardware this frame came in on 1301 * @skb: the buffer to receive, owned by mac80211 after this call 1302 * @status: status of this frame; the status pointer need not be valid 1303 * after this function returns 1304 */ 1305static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, 1306 struct ieee80211_rx_status *status) 1307{ 1308 __ieee80211_rx(hw, skb, status); 1309} 1310 1311/** 1312 * ieee80211_rx_irqsafe - receive frame 1313 * 1314 * Like ieee80211_rx() but can be called in IRQ context 1315 * (internally defers to a tasklet.) 1316 * 1317 * Calls to this function and ieee80211_rx() may not be mixed for a 1318 * single hardware. 1319 * 1320 * @hw: the hardware this frame came in on 1321 * @skb: the buffer to receive, owned by mac80211 after this call 1322 * @status: status of this frame; the status pointer need not be valid 1323 * after this function returns and is not freed by mac80211, 1324 * it is recommended that it points to a stack area 1325 */ 1326void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, 1327 struct sk_buff *skb, 1328 struct ieee80211_rx_status *status); 1329 1330/** 1331 * ieee80211_tx_status - transmit status callback 1332 * 1333 * Call this function for all transmitted frames after they have been 1334 * transmitted. It is permissible to not call this function for 1335 * multicast frames but this can affect statistics. 1336 * 1337 * This function may not be called in IRQ context. Calls to this function 1338 * for a single hardware must be synchronized against each other. Calls 1339 * to this function and ieee80211_tx_status_irqsafe() may not be mixed 1340 * for a single hardware. 1341 * 1342 * @hw: the hardware the frame was transmitted by 1343 * @skb: the frame that was transmitted, owned by mac80211 after this call 1344 * @status: status information for this frame; the status pointer need not 1345 * be valid after this function returns and is not freed by mac80211, 1346 * it is recommended that it points to a stack area 1347 */ 1348void ieee80211_tx_status(struct ieee80211_hw *hw, 1349 struct sk_buff *skb, 1350 struct ieee80211_tx_status *status); 1351 1352/** 1353 * ieee80211_tx_status_irqsafe - irq-safe transmit status callback 1354 * 1355 * Like ieee80211_tx_status() but can be called in IRQ context 1356 * (internally defers to a tasklet.) 1357 * 1358 * Calls to this function and ieee80211_tx_status() may not be mixed for a 1359 * single hardware. 1360 * 1361 * @hw: the hardware the frame was transmitted by 1362 * @skb: the frame that was transmitted, owned by mac80211 after this call 1363 * @status: status information for this frame; the status pointer need not 1364 * be valid after this function returns and is not freed by mac80211, 1365 * it is recommended that it points to a stack area 1366 */ 1367void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 1368 struct sk_buff *skb, 1369 struct ieee80211_tx_status *status); 1370 1371/** 1372 * ieee80211_beacon_get - beacon generation function 1373 * @hw: pointer obtained from ieee80211_alloc_hw(). 1374 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1375 * @control: will be filled with information needed to send this beacon. 1376 * 1377 * If the beacon frames are generated by the host system (i.e., not in 1378 * hardware/firmware), the low-level driver uses this function to receive 1379 * the next beacon frame from the 802.11 code. The low-level is responsible 1380 * for calling this function before beacon data is needed (e.g., based on 1381 * hardware interrupt). Returned skb is used only once and low-level driver 1382 * is responsible of freeing it. 1383 */ 1384struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 1385 struct ieee80211_vif *vif, 1386 struct ieee80211_tx_control *control); 1387 1388/** 1389 * ieee80211_rts_get - RTS frame generation function 1390 * @hw: pointer obtained from ieee80211_alloc_hw(). 1391 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1392 * @frame: pointer to the frame that is going to be protected by the RTS. 1393 * @frame_len: the frame length (in octets). 1394 * @frame_txctl: &struct ieee80211_tx_control of the frame. 1395 * @rts: The buffer where to store the RTS frame. 1396 * 1397 * If the RTS frames are generated by the host system (i.e., not in 1398 * hardware/firmware), the low-level driver uses this function to receive 1399 * the next RTS frame from the 802.11 code. The low-level is responsible 1400 * for calling this function before and RTS frame is needed. 1401 */ 1402void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1403 const void *frame, size_t frame_len, 1404 const struct ieee80211_tx_control *frame_txctl, 1405 struct ieee80211_rts *rts); 1406 1407/** 1408 * ieee80211_rts_duration - Get the duration field for an RTS frame 1409 * @hw: pointer obtained from ieee80211_alloc_hw(). 1410 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1411 * @frame_len: the length of the frame that is going to be protected by the RTS. 1412 * @frame_txctl: &struct ieee80211_tx_control of the frame. 1413 * 1414 * If the RTS is generated in firmware, but the host system must provide 1415 * the duration field, the low-level driver uses this function to receive 1416 * the duration field value in little-endian byteorder. 1417 */ 1418__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 1419 struct ieee80211_vif *vif, size_t frame_len, 1420 const struct ieee80211_tx_control *frame_txctl); 1421 1422/** 1423 * ieee80211_ctstoself_get - CTS-to-self frame generation function 1424 * @hw: pointer obtained from ieee80211_alloc_hw(). 1425 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1426 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 1427 * @frame_len: the frame length (in octets). 1428 * @frame_txctl: &struct ieee80211_tx_control of the frame. 1429 * @cts: The buffer where to store the CTS-to-self frame. 1430 * 1431 * If the CTS-to-self frames are generated by the host system (i.e., not in 1432 * hardware/firmware), the low-level driver uses this function to receive 1433 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 1434 * for calling this function before and CTS-to-self frame is needed. 1435 */ 1436void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 1437 struct ieee80211_vif *vif, 1438 const void *frame, size_t frame_len, 1439 const struct ieee80211_tx_control *frame_txctl, 1440 struct ieee80211_cts *cts); 1441 1442/** 1443 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 1444 * @hw: pointer obtained from ieee80211_alloc_hw(). 1445 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1446 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 1447 * @frame_txctl: &struct ieee80211_tx_control of the frame. 1448 * 1449 * If the CTS-to-self is generated in firmware, but the host system must provide 1450 * the duration field, the low-level driver uses this function to receive 1451 * the duration field value in little-endian byteorder. 1452 */ 1453__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 1454 struct ieee80211_vif *vif, 1455 size_t frame_len, 1456 const struct ieee80211_tx_control *frame_txctl); 1457 1458/** 1459 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 1460 * @hw: pointer obtained from ieee80211_alloc_hw(). 1461 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1462 * @frame_len: the length of the frame. 1463 * @rate: the rate at which the frame is going to be transmitted. 1464 * 1465 * Calculate the duration field of some generic frame, given its 1466 * length and transmission rate (in 100kbps). 1467 */ 1468__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 1469 struct ieee80211_vif *vif, 1470 size_t frame_len, 1471 struct ieee80211_rate *rate); 1472 1473/** 1474 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 1475 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1476 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1477 * @control: will be filled with information needed to send returned frame. 1478 * 1479 * Function for accessing buffered broadcast and multicast frames. If 1480 * hardware/firmware does not implement buffering of broadcast/multicast 1481 * frames when power saving is used, 802.11 code buffers them in the host 1482 * memory. The low-level driver uses this function to fetch next buffered 1483 * frame. In most cases, this is used when generating beacon frame. This 1484 * function returns a pointer to the next buffered skb or NULL if no more 1485 * buffered frames are available. 1486 * 1487 * Note: buffered frames are returned only after DTIM beacon frame was 1488 * generated with ieee80211_beacon_get() and the low-level driver must thus 1489 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 1490 * NULL if the previous generated beacon was not DTIM, so the low-level driver 1491 * does not need to check for DTIM beacons separately and should be able to 1492 * use common code for all beacons. 1493 */ 1494struct sk_buff * 1495ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1496 struct ieee80211_tx_control *control); 1497 1498/** 1499 * ieee80211_get_hdrlen_from_skb - get header length from data 1500 * 1501 * Given an skb with a raw 802.11 header at the data pointer this function 1502 * returns the 802.11 header length in bytes (not including encryption 1503 * headers). If the data in the sk_buff is too short to contain a valid 802.11 1504 * header the function returns 0. 1505 * 1506 * @skb: the frame 1507 */ 1508int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb); 1509 1510/** 1511 * ieee80211_get_hdrlen - get header length from frame control 1512 * 1513 * This function returns the 802.11 header length in bytes (not including 1514 * encryption headers.) 1515 * 1516 * @fc: the frame control field (in CPU endianness) 1517 */ 1518int ieee80211_get_hdrlen(u16 fc); 1519 1520/** 1521 * ieee80211_get_tkip_key - get a TKIP rc4 for skb 1522 * 1523 * This function computes a TKIP rc4 key for an skb. It computes 1524 * a phase 1 key if needed (iv16 wraps around). This function is to 1525 * be used by drivers which can do HW encryption but need to compute 1526 * to phase 1/2 key in SW. 1527 * 1528 * @keyconf: the parameter passed with the set key 1529 * @skb: the skb for which the key is needed 1530 * @rc4key: a buffer to which the key will be written 1531 */ 1532void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf, 1533 struct sk_buff *skb, 1534 enum ieee80211_tkip_key_type type, u8 *key); 1535/** 1536 * ieee80211_wake_queue - wake specific queue 1537 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1538 * @queue: queue number (counted from zero). 1539 * 1540 * Drivers should use this function instead of netif_wake_queue. 1541 */ 1542void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 1543 1544/** 1545 * ieee80211_stop_queue - stop specific queue 1546 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1547 * @queue: queue number (counted from zero). 1548 * 1549 * Drivers should use this function instead of netif_stop_queue. 1550 */ 1551void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 1552 1553/** 1554 * ieee80211_start_queues - start all queues 1555 * @hw: pointer to as obtained from ieee80211_alloc_hw(). 1556 * 1557 * Drivers should use this function instead of netif_start_queue. 1558 */ 1559void ieee80211_start_queues(struct ieee80211_hw *hw); 1560 1561/** 1562 * ieee80211_stop_queues - stop all queues 1563 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1564 * 1565 * Drivers should use this function instead of netif_stop_queue. 1566 */ 1567void ieee80211_stop_queues(struct ieee80211_hw *hw); 1568 1569/** 1570 * ieee80211_wake_queues - wake all queues 1571 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1572 * 1573 * Drivers should use this function instead of netif_wake_queue. 1574 */ 1575void ieee80211_wake_queues(struct ieee80211_hw *hw); 1576 1577/** 1578 * ieee80211_scan_completed - completed hardware scan 1579 * 1580 * When hardware scan offload is used (i.e. the hw_scan() callback is 1581 * assigned) this function needs to be called by the driver to notify 1582 * mac80211 that the scan finished. 1583 * 1584 * @hw: the hardware that finished the scan 1585 */ 1586void ieee80211_scan_completed(struct ieee80211_hw *hw); 1587 1588/** 1589 * ieee80211_iterate_active_interfaces - iterate active interfaces 1590 * 1591 * This function iterates over the interfaces associated with a given 1592 * hardware that are currently active and calls the callback for them. 1593 * 1594 * @hw: the hardware struct of which the interfaces should be iterated over 1595 * @iterator: the iterator function to call, cannot sleep 1596 * @data: first argument of the iterator function 1597 */ 1598void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 1599 void (*iterator)(void *data, u8 *mac, 1600 struct ieee80211_vif *vif), 1601 void *data); 1602 1603/** 1604 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 1605 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1606 * @ra: receiver address of the BA session recipient 1607 * @tid: the TID to BA on. 1608 * @return: success if addBA request was sent, failure otherwise 1609 * 1610 * Although mac80211/low level driver/user space application can estimate 1611 * the need to start aggregation on a certain RA/TID, the session level 1612 * will be managed by the mac80211. 1613 */ 1614int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid); 1615 1616/** 1617 * ieee80211_start_tx_ba_cb - low level driver ready to aggregate. 1618 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1619 * @ra: receiver address of the BA session recipient. 1620 * @tid: the TID to BA on. 1621 * 1622 * This function must be called by low level driver once it has 1623 * finished with preparations for the BA session. 1624 */ 1625void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid); 1626 1627/** 1628 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 1629 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1630 * @ra: receiver address of the BA session recipient. 1631 * @tid: the TID to BA on. 1632 * 1633 * This function must be called by low level driver once it has 1634 * finished with preparations for the BA session. 1635 * This version of the function is irq safe. 1636 */ 1637void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra, 1638 u16 tid); 1639 1640/** 1641 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 1642 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1643 * @ra: receiver address of the BA session recipient 1644 * @tid: the TID to stop BA. 1645 * @initiator: if indicates initiator DELBA frame will be sent. 1646 * @return: error if no sta with matching da found, success otherwise 1647 * 1648 * Although mac80211/low level driver/user space application can estimate 1649 * the need to stop aggregation on a certain RA/TID, the session level 1650 * will be managed by the mac80211. 1651 */ 1652int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw, 1653 u8 *ra, u16 tid, 1654 enum ieee80211_back_parties initiator); 1655 1656/** 1657 * ieee80211_stop_tx_ba_cb - low level driver ready to stop aggregate. 1658 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1659 * @ra: receiver address of the BA session recipient. 1660 * @tid: the desired TID to BA on. 1661 * 1662 * This function must be called by low level driver once it has 1663 * finished with preparations for the BA session tear down. 1664 */ 1665void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid); 1666 1667/** 1668 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 1669 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1670 * @ra: receiver address of the BA session recipient. 1671 * @tid: the desired TID to BA on. 1672 * 1673 * This function must be called by low level driver once it has 1674 * finished with preparations for the BA session tear down. 1675 * This version of the function is irq safe. 1676 */ 1677void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra, 1678 u16 tid); 1679 1680#endif /* MAC80211_H */ 1681