mac80211.h revision 1bc0826c8f5f3fa26644a8e878aae0be304a670f
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/* Note! Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be 26 * called in hardware interrupt context. The low-level driver must not call any 27 * other functions in hardware interrupt context. If there is a need for such 28 * call, the low-level driver should first ACK the interrupt and perform the 29 * IEEE 802.11 code call after this, e.g., from a scheduled tasklet (in 30 * software interrupt context). 31 */ 32 33/* 34 * Frame format used when passing frame between low-level hardware drivers 35 * and IEEE 802.11 driver the same as used in the wireless media, i.e., 36 * buffers start with IEEE 802.11 header and include the same octets that 37 * are sent over air. 38 * 39 * If hardware uses IEEE 802.3 headers (and perform 802.3 <-> 802.11 40 * conversion in firmware), upper layer 802.11 code needs to be changed to 41 * support this. 42 * 43 * If the receive frame format is not the same as the real frame sent 44 * on the wireless media (e.g., due to padding etc.), upper layer 802.11 code 45 * could be updated to provide support for such format assuming this would 46 * optimize the performance, e.g., by removing need to re-allocation and 47 * copying of the data. 48 */ 49 50#define IEEE80211_CHAN_W_SCAN 0x00000001 51#define IEEE80211_CHAN_W_ACTIVE_SCAN 0x00000002 52#define IEEE80211_CHAN_W_IBSS 0x00000004 53 54/* Channel information structure. Low-level driver is expected to fill in chan, 55 * freq, and val fields. Other fields will be filled in by 80211.o based on 56 * hostapd information and low-level driver does not need to use them. The 57 * limits for each channel will be provided in 'struct ieee80211_conf' when 58 * configuring the low-level driver with hw->config callback. If a device has 59 * a default regulatory domain, IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED 60 * can be set to let the driver configure all fields */ 61struct ieee80211_channel { 62 short chan; /* channel number (IEEE 802.11) */ 63 short freq; /* frequency in MHz */ 64 int val; /* hw specific value for the channel */ 65 int flag; /* flag for hostapd use (IEEE80211_CHAN_*) */ 66 unsigned char power_level; 67 unsigned char antenna_max; 68}; 69 70#define IEEE80211_RATE_ERP 0x00000001 71#define IEEE80211_RATE_BASIC 0x00000002 72#define IEEE80211_RATE_PREAMBLE2 0x00000004 73#define IEEE80211_RATE_SUPPORTED 0x00000010 74#define IEEE80211_RATE_OFDM 0x00000020 75#define IEEE80211_RATE_CCK 0x00000040 76#define IEEE80211_RATE_MANDATORY 0x00000100 77 78#define IEEE80211_RATE_CCK_2 (IEEE80211_RATE_CCK | IEEE80211_RATE_PREAMBLE2) 79#define IEEE80211_RATE_MODULATION(f) \ 80 (f & (IEEE80211_RATE_CCK | IEEE80211_RATE_OFDM)) 81 82/* Low-level driver should set PREAMBLE2, OFDM and CCK flags. 83 * BASIC, SUPPORTED, ERP, and MANDATORY flags are set in 80211.o based on the 84 * configuration. */ 85struct ieee80211_rate { 86 int rate; /* rate in 100 kbps */ 87 int val; /* hw specific value for the rate */ 88 int flags; /* IEEE80211_RATE_ flags */ 89 int val2; /* hw specific value for the rate when using short preamble 90 * (only when IEEE80211_RATE_PREAMBLE2 flag is set, i.e., for 91 * 2, 5.5, and 11 Mbps) */ 92 signed char min_rssi_ack; 93 unsigned char min_rssi_ack_delta; 94 95 /* following fields are set by 80211.o and need not be filled by the 96 * low-level driver */ 97 int rate_inv; /* inverse of the rate (LCM(all rates) / rate) for 98 * optimizing channel utilization estimates */ 99}; 100 101/** 102 * enum ieee80211_phymode - PHY modes 103 * 104 * @MODE_IEEE80211A: 5GHz as defined by 802.11a/802.11h 105 * @MODE_IEEE80211B: 2.4 GHz as defined by 802.11b 106 * @MODE_IEEE80211G: 2.4 GHz as defined by 802.11g (with OFDM), 107 * backwards compatible with 11b mode 108 * @NUM_IEEE80211_MODES: internal 109 */ 110enum ieee80211_phymode { 111 MODE_IEEE80211A, 112 MODE_IEEE80211B, 113 MODE_IEEE80211G, 114 115 /* keep last */ 116 NUM_IEEE80211_MODES 117}; 118 119/** 120 * struct ieee80211_hw_mode - PHY mode definition 121 * 122 * This structure describes the capabilities supported by the device 123 * in a single PHY mode. 124 * 125 * @mode: the PHY mode for this definition 126 * @num_channels: number of supported channels 127 * @channels: pointer to array of supported channels 128 * @num_rates: number of supported bitrates 129 * @rates: pointer to array of supported bitrates 130 * @list: internal 131 */ 132struct ieee80211_hw_mode { 133 struct list_head list; 134 struct ieee80211_channel *channels; 135 struct ieee80211_rate *rates; 136 enum ieee80211_phymode mode; 137 int num_channels; 138 int num_rates; 139}; 140 141/** 142 * struct ieee80211_tx_queue_params - transmit queue configuration 143 * 144 * The information provided in this structure is required for QoS 145 * transmit queue configuration. 146 * 147 * @aifs: arbitration interface space [0..255, -1: use default] 148 * @cw_min: minimum contention window [will be a value of the form 149 * 2^n-1 in the range 1..1023; 0: use default] 150 * @cw_max: maximum contention window [like @cw_min] 151 * @burst_time: maximum burst time in units of 0.1ms, 0 meaning disabled 152 */ 153struct ieee80211_tx_queue_params { 154 int aifs; 155 int cw_min; 156 int cw_max; 157 int burst_time; 158}; 159 160/** 161 * struct ieee80211_tx_queue_stats_data - transmit queue statistics 162 * 163 * @len: number of packets in queue 164 * @limit: queue length limit 165 * @count: number of frames sent 166 */ 167struct ieee80211_tx_queue_stats_data { 168 unsigned int len; 169 unsigned int limit; 170 unsigned int count; 171}; 172 173/** 174 * enum ieee80211_tx_queue - transmit queue number 175 * 176 * These constants are used with some callbacks that take a 177 * queue number to set parameters for a queue. 178 * 179 * @IEEE80211_TX_QUEUE_DATA0: data queue 0 180 * @IEEE80211_TX_QUEUE_DATA1: data queue 1 181 * @IEEE80211_TX_QUEUE_DATA2: data queue 2 182 * @IEEE80211_TX_QUEUE_DATA3: data queue 3 183 * @IEEE80211_TX_QUEUE_DATA4: data queue 4 184 * @IEEE80211_TX_QUEUE_SVP: ?? 185 * @NUM_TX_DATA_QUEUES: number of data queues 186 * @IEEE80211_TX_QUEUE_AFTER_BEACON: transmit queue for frames to be 187 * sent after a beacon 188 * @IEEE80211_TX_QUEUE_BEACON: transmit queue for beacon frames 189 */ 190enum ieee80211_tx_queue { 191 IEEE80211_TX_QUEUE_DATA0, 192 IEEE80211_TX_QUEUE_DATA1, 193 IEEE80211_TX_QUEUE_DATA2, 194 IEEE80211_TX_QUEUE_DATA3, 195 IEEE80211_TX_QUEUE_DATA4, 196 IEEE80211_TX_QUEUE_SVP, 197 198 NUM_TX_DATA_QUEUES, 199 200/* due to stupidity in the sub-ioctl userspace interface, the items in 201 * this struct need to have fixed values. As soon as it is removed, we can 202 * fix these entries. */ 203 IEEE80211_TX_QUEUE_AFTER_BEACON = 6, 204 IEEE80211_TX_QUEUE_BEACON = 7 205}; 206 207struct ieee80211_tx_queue_stats { 208 struct ieee80211_tx_queue_stats_data data[NUM_TX_DATA_QUEUES]; 209}; 210 211struct ieee80211_low_level_stats { 212 unsigned int dot11ACKFailureCount; 213 unsigned int dot11RTSFailureCount; 214 unsigned int dot11FCSErrorCount; 215 unsigned int dot11RTSSuccessCount; 216}; 217 218/* Transmit control fields. This data structure is passed to low-level driver 219 * with each TX frame. The low-level driver is responsible for configuring 220 * the hardware to use given values (depending on what is supported). */ 221 222struct ieee80211_tx_control { 223 int tx_rate; /* Transmit rate, given as the hw specific value for the 224 * rate (from struct ieee80211_rate) */ 225 int rts_cts_rate; /* Transmit rate for RTS/CTS frame, given as the hw 226 * specific value for the rate (from 227 * struct ieee80211_rate) */ 228 229#define IEEE80211_TXCTL_REQ_TX_STATUS (1<<0)/* request TX status callback for 230 * this frame */ 231#define IEEE80211_TXCTL_DO_NOT_ENCRYPT (1<<1) /* send this frame without 232 * encryption; e.g., for EAPOL 233 * frames */ 234#define IEEE80211_TXCTL_USE_RTS_CTS (1<<2) /* use RTS-CTS before sending 235 * frame */ 236#define IEEE80211_TXCTL_USE_CTS_PROTECT (1<<3) /* use CTS protection for the 237 * frame (e.g., for combined 238 * 802.11g / 802.11b networks) */ 239#define IEEE80211_TXCTL_NO_ACK (1<<4) /* tell the low level not to 240 * wait for an ack */ 241#define IEEE80211_TXCTL_RATE_CTRL_PROBE (1<<5) 242#define IEEE80211_TXCTL_CLEAR_DST_MASK (1<<6) 243#define IEEE80211_TXCTL_REQUEUE (1<<7) 244#define IEEE80211_TXCTL_FIRST_FRAGMENT (1<<8) /* this is a first fragment of 245 * the frame */ 246#define IEEE80211_TXCTL_LONG_RETRY_LIMIT (1<<10) /* this frame should be send 247 * using the through 248 * set_retry_limit configured 249 * long retry value */ 250 u32 flags; /* tx control flags defined 251 * above */ 252 u8 key_idx; /* keyidx from hw->set_key(), undefined if 253 * IEEE80211_TXCTL_DO_NOT_ENCRYPT is set */ 254 u8 retry_limit; /* 1 = only first attempt, 2 = one retry, .. 255 * This could be used when set_retry_limit 256 * is not implemented by the driver */ 257 u8 power_level; /* per-packet transmit power level, in dBm */ 258 u8 antenna_sel_tx; /* 0 = default/diversity, 1 = Ant0, 2 = Ant1 */ 259 u8 icv_len; /* length of the ICV/MIC field in octets */ 260 u8 iv_len; /* length of the IV field in octets */ 261 u8 queue; /* hardware queue to use for this frame; 262 * 0 = highest, hw->queues-1 = lowest */ 263 struct ieee80211_rate *rate; /* internal 80211.o rate */ 264 struct ieee80211_rate *rts_rate; /* internal 80211.o rate 265 * for RTS/CTS */ 266 int alt_retry_rate; /* retry rate for the last retries, given as the 267 * hw specific value for the rate (from 268 * struct ieee80211_rate). To be used to limit 269 * packet dropping when probing higher rates, if hw 270 * supports multiple retry rates. -1 = not used */ 271 int type; /* internal */ 272 int ifindex; /* internal */ 273}; 274 275 276/** 277 * enum mac80211_rx_flags - receive flags 278 * 279 * These flags are used with the @flag member of &struct ieee80211_rx_status. 280 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 281 * Use together with %RX_FLAG_MMIC_STRIPPED. 282 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 283 * @RX_FLAG_RADIOTAP: This frame starts with a radiotap header. 284 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 285 * verification has been done by the hardware. 286 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 287 * If this flag is set, the stack cannot do any replay detection 288 * hence the driver or hardware will have to do that. 289 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 290 * the frame. 291 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 292 * the frame. 293 */ 294enum mac80211_rx_flags { 295 RX_FLAG_MMIC_ERROR = 1<<0, 296 RX_FLAG_DECRYPTED = 1<<1, 297 RX_FLAG_RADIOTAP = 1<<2, 298 RX_FLAG_MMIC_STRIPPED = 1<<3, 299 RX_FLAG_IV_STRIPPED = 1<<4, 300 RX_FLAG_FAILED_FCS_CRC = 1<<5, 301 RX_FLAG_FAILED_PLCP_CRC = 1<<6, 302}; 303 304/** 305 * struct ieee80211_rx_status - receive status 306 * 307 * The low-level driver should provide this information (the subset 308 * supported by hardware) to the 802.11 code with each received 309 * frame. 310 * @mactime: MAC timestamp as defined by 802.11 311 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 312 * @channel: channel the radio was tuned to 313 * @phymode: active PHY mode 314 * @ssi: signal strength when receiving this frame 315 * @signal: used as 'qual' in statistics reporting 316 * @noise: PHY noise when receiving this frame 317 * @antenna: antenna used 318 * @rate: data rate 319 * @flag: %RX_FLAG_* 320 */ 321struct ieee80211_rx_status { 322 u64 mactime; 323 int freq; 324 int channel; 325 enum ieee80211_phymode phymode; 326 int ssi; 327 int signal; 328 int noise; 329 int antenna; 330 int rate; 331 int flag; 332}; 333 334/** 335 * enum ieee80211_tx_status_flags - transmit status flags 336 * 337 * Status flags to indicate various transmit conditions. 338 * 339 * @IEEE80211_TX_STATUS_TX_FILTERED: The frame was not transmitted 340 * because the destination STA was in powersave mode. 341 * 342 * @IEEE80211_TX_STATUS_ACK: Frame was acknowledged 343 */ 344enum ieee80211_tx_status_flags { 345 IEEE80211_TX_STATUS_TX_FILTERED = 1<<0, 346 IEEE80211_TX_STATUS_ACK = 1<<1, 347}; 348 349/** 350 * struct ieee80211_tx_status - transmit status 351 * 352 * As much information as possible should be provided for each transmitted 353 * frame with ieee80211_tx_status(). 354 * 355 * @control: a copy of the &struct ieee80211_tx_control passed to the driver 356 * in the tx() callback. 357 * 358 * @flags: transmit status flags, defined above 359 * 360 * @ack_signal: signal strength of the ACK frame 361 * 362 * @excessive_retries: set to 1 if the frame was retried many times 363 * but not acknowledged 364 * 365 * @retry_count: number of retries 366 * 367 * @queue_length: ?? REMOVE 368 * @queue_number: ?? REMOVE 369 */ 370struct ieee80211_tx_status { 371 struct ieee80211_tx_control control; 372 u8 flags; 373 bool excessive_retries; 374 u8 retry_count; 375 int ack_signal; 376 int queue_length; 377 int queue_number; 378}; 379 380/** 381 * enum ieee80211_conf_flags - configuration flags 382 * 383 * Flags to define PHY configuration options 384 * 385 * @IEEE80211_CONF_SHORT_SLOT_TIME: use 802.11g short slot time 386 * @IEEE80211_CONF_RADIOTAP: add radiotap header at receive time (if supported) 387 * 388 */ 389enum ieee80211_conf_flags { 390 IEEE80211_CONF_SHORT_SLOT_TIME = 1<<0, 391 IEEE80211_CONF_RADIOTAP = 1<<1, 392}; 393 394/** 395 * struct ieee80211_conf - configuration of the device 396 * 397 * This struct indicates how the driver shall configure the hardware. 398 * 399 * @radio_enabled: when zero, driver is required to switch off the radio. 400 * TODO make a flag 401 * @channel: IEEE 802.11 channel number 402 * @freq: frequency in MHz 403 * @channel_val: hardware specific channel value for the channel 404 * @phymode: PHY mode to activate (REMOVE) 405 * @chan: channel to switch to, pointer to the channel information 406 * @mode: pointer to mode definition 407 * @regulatory_domain: ?? 408 * @beacon_int: beacon interval (TODO make interface config) 409 * @flags: configuration flags defined above 410 * @power_level: transmit power limit for current regulatory domain in dBm 411 * @antenna_max: maximum antenna gain 412 * @antenna_sel_tx: transmit antenna selection, 0: default/diversity, 413 * 1/2: antenna 0/1 414 * @antenna_sel_rx: receive antenna selection, like @antenna_sel_tx 415 */ 416struct ieee80211_conf { 417 int channel; /* IEEE 802.11 channel number */ 418 int freq; /* MHz */ 419 int channel_val; /* hw specific value for the channel */ 420 421 enum ieee80211_phymode phymode; 422 struct ieee80211_channel *chan; 423 struct ieee80211_hw_mode *mode; 424 unsigned int regulatory_domain; 425 int radio_enabled; 426 427 int beacon_int; 428 u32 flags; 429 u8 power_level; 430 u8 antenna_max; 431 u8 antenna_sel_tx; 432 u8 antenna_sel_rx; 433}; 434 435/** 436 * enum ieee80211_if_types - types of 802.11 network interfaces 437 * 438 * @IEEE80211_IF_TYPE_AP: interface in AP mode. 439 * @IEEE80211_IF_TYPE_MGMT: special interface for communication with hostap 440 * daemon. Drivers should never see this type. 441 * @IEEE80211_IF_TYPE_STA: interface in STA (client) mode. 442 * @IEEE80211_IF_TYPE_IBSS: interface in IBSS (ad-hoc) mode. 443 * @IEEE80211_IF_TYPE_MNTR: interface in monitor (rfmon) mode. 444 * @IEEE80211_IF_TYPE_WDS: interface in WDS mode. 445 * @IEEE80211_IF_TYPE_VLAN: VLAN interface bound to an AP, drivers 446 * will never see this type. 447 */ 448enum ieee80211_if_types { 449 IEEE80211_IF_TYPE_AP, 450 IEEE80211_IF_TYPE_MGMT, 451 IEEE80211_IF_TYPE_STA, 452 IEEE80211_IF_TYPE_IBSS, 453 IEEE80211_IF_TYPE_MNTR, 454 IEEE80211_IF_TYPE_WDS, 455 IEEE80211_IF_TYPE_VLAN, 456}; 457 458/** 459 * struct ieee80211_if_init_conf - initial configuration of an interface 460 * 461 * @if_id: internal interface ID. This number has no particular meaning to 462 * drivers and the only allowed usage is to pass it to 463 * ieee80211_beacon_get() and ieee80211_get_buffered_bc() functions. 464 * This field is not valid for monitor interfaces 465 * (interfaces of %IEEE80211_IF_TYPE_MNTR type). 466 * @type: one of &enum ieee80211_if_types constants. Determines the type of 467 * added/removed interface. 468 * @mac_addr: pointer to MAC address of the interface. This pointer is valid 469 * until the interface is removed (i.e. it cannot be used after 470 * remove_interface() callback was called for this interface). 471 * 472 * This structure is used in add_interface() and remove_interface() 473 * callbacks of &struct ieee80211_hw. 474 * 475 * When you allow multiple interfaces to be added to your PHY, take care 476 * that the hardware can actually handle multiple MAC addresses. However, 477 * also take care that when there's no interface left with mac_addr != %NULL 478 * you remove the MAC address from the device to avoid acknowledging packets 479 * in pure monitor mode. 480 */ 481struct ieee80211_if_init_conf { 482 int if_id; 483 int type; 484 void *mac_addr; 485}; 486 487/** 488 * struct ieee80211_if_conf - configuration of an interface 489 * 490 * @type: type of the interface. This is always the same as was specified in 491 * &struct ieee80211_if_init_conf. The type of an interface never changes 492 * during the life of the interface; this field is present only for 493 * convenience. 494 * @bssid: BSSID of the network we are associated to/creating. 495 * @ssid: used (together with @ssid_len) by drivers for hardware that 496 * generate beacons independently. The pointer is valid only during the 497 * config_interface() call, so copy the value somewhere if you need 498 * it. 499 * @ssid_len: length of the @ssid field. 500 * @generic_elem: used (together with @generic_elem_len) by drivers for 501 * hardware that generate beacons independently. The pointer is valid 502 * only during the config_interface() call, so copy the value somewhere 503 * if you need it. 504 * @generic_elem_len: length of the generic element. 505 * @beacon: beacon template. Valid only if @host_gen_beacon_template in 506 * &struct ieee80211_hw is set. The driver is responsible of freeing 507 * the sk_buff. 508 * @beacon_control: tx_control for the beacon template, this field is only 509 * valid when the @beacon field was set. 510 * 511 * This structure is passed to the config_interface() callback of 512 * &struct ieee80211_hw. 513 */ 514struct ieee80211_if_conf { 515 int type; 516 u8 *bssid; 517 u8 *ssid; 518 size_t ssid_len; 519 u8 *generic_elem; 520 size_t generic_elem_len; 521 struct sk_buff *beacon; 522 struct ieee80211_tx_control *beacon_control; 523}; 524 525/** 526 * enum ieee80211_key_alg - key algorithm 527 * @ALG_NONE: Unset key algorithm, will never be passed to the driver 528 * @ALG_WEP: WEP40 or WEP104 529 * @ALG_TKIP: TKIP 530 * @ALG_CCMP: CCMP (AES) 531 */ 532typedef enum ieee80211_key_alg { 533 ALG_NONE, 534 ALG_WEP, 535 ALG_TKIP, 536 ALG_CCMP, 537} ieee80211_key_alg; 538 539 540/** 541 * enum ieee80211_key_flags - key flags 542 * 543 * These flags are used for communication about keys between the driver 544 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 545 * 546 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 547 * that the STA this key will be used with could be using QoS. 548 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 549 * driver to indicate that it requires IV generation for this 550 * particular key. 551 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 552 * the driver for a TKIP key if it requires Michael MIC 553 * generation in software. 554 */ 555enum ieee80211_key_flags { 556 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 557 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 558 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 559}; 560 561/** 562 * struct ieee80211_key_conf - key information 563 * 564 * This key information is given by mac80211 to the driver by 565 * the set_key() callback in &struct ieee80211_ops. 566 * 567 * @hw_key_idx: To be set by the driver, this is the key index the driver 568 * wants to be given when a frame is transmitted and needs to be 569 * encrypted in hardware. 570 * @alg: The key algorithm. 571 * @flags: key flags, see &enum ieee80211_key_flags. 572 * @keyidx: the key index (0-3) 573 * @keylen: key material length 574 * @key: key material 575 */ 576struct ieee80211_key_conf { 577 ieee80211_key_alg alg; 578 u8 hw_key_idx; 579 u8 flags; 580 s8 keyidx; 581 u8 keylen; 582 u8 key[0]; 583}; 584 585#define IEEE80211_SEQ_COUNTER_RX 0 586#define IEEE80211_SEQ_COUNTER_TX 1 587 588/** 589 * enum set_key_cmd - key command 590 * 591 * Used with the set_key() callback in &struct ieee80211_ops, this 592 * indicates whether a key is being removed or added. 593 * 594 * @SET_KEY: a key is set 595 * @DISABLE_KEY: a key must be disabled 596 */ 597typedef enum set_key_cmd { 598 SET_KEY, DISABLE_KEY, 599} set_key_cmd; 600 601 602/** 603 * enum ieee80211_hw_flags - hardware flags 604 * 605 * These flags are used to indicate hardware capabilities to 606 * the stack. Generally, flags here should have their meaning 607 * done in a way that the simplest hardware doesn't need setting 608 * any particular flags. There are some exceptions to this rule, 609 * however, so you are advised to review these flags carefully. 610 * 611 * @IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE: 612 * The device only needs to be supplied with a beacon template. 613 * If you need the host to generate each beacon then don't use 614 * this flag and call ieee80211_beacon_get() when you need the 615 * next beacon frame. Note that if you set this flag, you must 616 * implement the set_tim() callback for powersave mode to work 617 * properly. 618 * This flag is only relevant for access-point mode. 619 * 620 * @IEEE80211_HW_RX_INCLUDES_FCS: 621 * Indicates that received frames passed to the stack include 622 * the FCS at the end. 623 * 624 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 625 * Some wireless LAN chipsets buffer broadcast/multicast frames 626 * for power saving stations in the hardware/firmware and others 627 * rely on the host system for such buffering. This option is used 628 * to configure the IEEE 802.11 upper layer to buffer broadcast and 629 * multicast frames when there are power saving stations so that 630 * the driver can fetch them with ieee80211_get_buffered_bc(). Note 631 * that not setting this flag works properly only when the 632 * %IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE is also not set because 633 * otherwise the stack will not know when the DTIM beacon was sent. 634 * 635 * @IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED: 636 * Channels are already configured to the default regulatory domain 637 * specified in the device's EEPROM 638 */ 639enum ieee80211_hw_flags { 640 IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE = 1<<0, 641 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 642 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 643 IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED = 1<<3, 644}; 645 646/** 647 * struct ieee80211_hw - hardware information and state 648 * TODO: move documentation into kernel-doc format 649 */ 650struct ieee80211_hw { 651 /* points to the cfg80211 wiphy for this piece. Note 652 * that you must fill in the perm_addr and dev fields 653 * of this structure, use the macros provided below. */ 654 struct wiphy *wiphy; 655 656 /* assigned by mac80211, don't write */ 657 struct ieee80211_conf conf; 658 659 /* Single thread workqueue available for driver use 660 * Allocated by mac80211 on registration */ 661 struct workqueue_struct *workqueue; 662 663 /* Pointer to the private area that was 664 * allocated with this struct for you. */ 665 void *priv; 666 667 /* The rest is information about your hardware */ 668 669 u32 flags; /* hardware flags defined above */ 670 671 /* Set to the size of a needed device specific skb headroom for TX skbs. */ 672 unsigned int extra_tx_headroom; 673 674 /* This is the time in us to change channels 675 */ 676 int channel_change_time; 677 /* Maximum values for various statistics. 678 * Leave at 0 to indicate no support. Use negative numbers for dBm. */ 679 s8 max_rssi; 680 s8 max_signal; 681 s8 max_noise; 682 683 /* Number of available hardware TX queues for data packets. 684 * WMM requires at least four queues. */ 685 int queues; 686}; 687 688static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 689{ 690 set_wiphy_dev(hw->wiphy, dev); 691} 692 693static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 694{ 695 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 696} 697 698/* 699 * flags for change_filter_flags() 700 * 701 * Note that e.g. if PROMISC_IN_BSS is unset then 702 * you should still do MAC address filtering if 703 * possible even if OTHER_BSS is set to indicate 704 * no BSSID filtering should be done. 705 */ 706/* 707 * promiscuous mode within your BSS, 708 * think of the BSS as your network segment and then this corresponds 709 * to the regular ethernet device promiscuous mode 710 */ 711#define FIF_PROMISC_IN_BSS 0x01 712/* show all multicast frames */ 713#define FIF_ALLMULTI 0x02 714/* show frames with failed FCS, but set RX_FLAG_FAILED_FCS_CRC for them */ 715#define FIF_FCSFAIL 0x04 716/* show frames with failed PLCP CRC, but set RX_FLAG_FAILED_PLCP_CRC for them */ 717#define FIF_PLCPFAIL 0x08 718/* 719 * This flag is set during scanning to indicate to the hardware 720 * that it should not filter beacons or probe responses by BSSID. 721 */ 722#define FIF_BCN_PRBRESP_PROMISC 0x10 723/* 724 * show control frames, if PROMISC_IN_BSS is not set then 725 * only those addressed to this station 726 */ 727#define FIF_CONTROL 0x20 728/* show frames from other BSSes */ 729#define FIF_OTHER_BSS 0x40 730 731/* Configuration block used by the low-level driver to tell the 802.11 code 732 * about supported hardware features and to pass function pointers to callback 733 * functions. */ 734struct ieee80211_ops { 735 /* Handler that 802.11 module calls for each transmitted frame. 736 * skb contains the buffer starting from the IEEE 802.11 header. 737 * The low-level driver should send the frame out based on 738 * configuration in the TX control data. 739 * Must be atomic. */ 740 int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb, 741 struct ieee80211_tx_control *control); 742 743 /* 744 * Called before the first netdevice attached to the hardware 745 * is enabled. This should turn on the hardware and must turn on 746 * frame reception (for possibly enabled monitor interfaces.) 747 * Returns negative error codes, these may be seen in userspace, 748 * or zero. 749 * When the device is started it should not have a MAC address 750 * to avoid acknowledging frames before a non-monitor device 751 * is added. 752 * 753 * Must be implemented. 754 */ 755 int (*start)(struct ieee80211_hw *hw); 756 757 /* 758 * Called after last netdevice attached to the hardware 759 * is disabled. This should turn off the hardware (at least 760 * it must turn off frame reception.) 761 * May be called right after add_interface if that rejects 762 * an interface. 763 * 764 * Must be implemented. 765 */ 766 void (*stop)(struct ieee80211_hw *hw); 767 768 /* 769 * Called when a netdevice attached to the hardware is enabled. 770 * Because it is not called for monitor mode devices, open() 771 * and stop() must be implemented. 772 * The driver should perform any initialization it needs before 773 * the device can be enabled. The initial configuration for the 774 * interface is given in the conf parameter. 775 * 776 * Must be implemented. 777 */ 778 int (*add_interface)(struct ieee80211_hw *hw, 779 struct ieee80211_if_init_conf *conf); 780 781 /* 782 * Notifies a driver that an interface is going down. The stop() handler 783 * is called after this if it is the last interface and no monitor 784 * interfaces are present. 785 * When all interfaces are removed, the MAC address in the hardware 786 * must be cleared so the device no longer acknowledges packets, 787 * the mac_addr member of the conf structure is, however, set to the 788 * MAC address of the device going away. 789 * 790 * Hence, this callback must be implemented. 791 */ 792 void (*remove_interface)(struct ieee80211_hw *hw, 793 struct ieee80211_if_init_conf *conf); 794 795 /* Handler for configuration requests. IEEE 802.11 code calls this 796 * function to change hardware configuration, e.g., channel. */ 797 int (*config)(struct ieee80211_hw *hw, struct ieee80211_conf *conf); 798 799 /* Handler for configuration requests related to interfaces (e.g. 800 * BSSID). */ 801 int (*config_interface)(struct ieee80211_hw *hw, 802 int if_id, struct ieee80211_if_conf *conf); 803 804 /* 805 * Configure the device's RX filter. 806 * 807 * The multicast address filter must be changed if the hardware flags 808 * indicate that one is present. 809 * 810 * All unsupported flags in 'total_flags' must be cleared, 811 * clear all bits except those you honoured. 812 * 813 * The callback must be implemented and must be atomic. 814 */ 815 void (*configure_filter)(struct ieee80211_hw *hw, 816 unsigned int changed_flags, 817 unsigned int *total_flags, 818 int mc_count, struct dev_addr_list *mc_list); 819 820 /* Set TIM bit handler. If the hardware/firmware takes care of beacon 821 * generation, IEEE 802.11 code uses this function to tell the 822 * low-level to set (or clear if set==0) TIM bit for the given aid. If 823 * host system is used to generate beacons, this handler is not used 824 * and low-level driver should set it to NULL. 825 * Must be atomic. */ 826 int (*set_tim)(struct ieee80211_hw *hw, int aid, int set); 827 828 /* 829 * Set encryption key. 830 * 831 * This is called to enable hardware acceleration of encryption and 832 * decryption. The address will be the broadcast address for default 833 * keys, the other station's hardware address for individual keys or 834 * the zero address for keys that will be used only for transmission. 835 * 836 * The local_address parameter will always be set to our own address, 837 * this is only relevant if you support multiple local addresses. 838 * 839 * When transmitting, the TX control data will use the hw_key_idx 840 * selected by the low-level driver. 841 * 842 * Return 0 if the key is now in use, -EOPNOTSUPP or -ENOSPC if it 843 * couldn't be added; if you return 0 then hw_key_idx must be assigned 844 * to the hardware key index, you are free to use the full u8 range. 845 * 846 * When the cmd is DISABLE_KEY then it must succeed. 847 * 848 * Note that it is permissible to not decrypt a frame even if a key 849 * for it has been uploaded to hardware, the stack will not make any 850 * decision based on whether a key has been uploaded or not but rather 851 * based on the receive flags. 852 * 853 * This callback can sleep, and is only called between add_interface 854 * and remove_interface calls, i.e. while the interface with the 855 * given local_address is enabled. 856 * 857 * The ieee80211_key_conf structure pointed to by the key parameter 858 * is guaranteed to be valid until another call to set_key removes 859 * it, but it can only be used as a cookie to differentiate keys. 860 */ 861 int (*set_key)(struct ieee80211_hw *hw, set_key_cmd cmd, 862 const u8 *local_address, const u8 *address, 863 struct ieee80211_key_conf *key); 864 865 /* Enable/disable IEEE 802.1X. This item requests wlan card to pass 866 * unencrypted EAPOL-Key frames even when encryption is configured. 867 * If the wlan card does not require such a configuration, this 868 * function pointer can be set to NULL. */ 869 int (*set_ieee8021x)(struct ieee80211_hw *hw, int use_ieee8021x); 870 871 /* Set port authorization state (IEEE 802.1X PAE) to be authorized 872 * (authorized=1) or unauthorized (authorized=0). This function can be 873 * used if the wlan hardware or low-level driver implements PAE. 874 * 80211.o module will anyway filter frames based on authorization 875 * state, so this function pointer can be NULL if low-level driver does 876 * not require event notification about port state changes. 877 * Currently unused. */ 878 int (*set_port_auth)(struct ieee80211_hw *hw, u8 *addr, 879 int authorized); 880 881 /* Ask the hardware to service the scan request, no need to start 882 * the scan state machine in stack. */ 883 int (*hw_scan)(struct ieee80211_hw *hw, u8 *ssid, size_t len); 884 885 /* return low-level statistics */ 886 int (*get_stats)(struct ieee80211_hw *hw, 887 struct ieee80211_low_level_stats *stats); 888 889 /* For devices that generate their own beacons and probe response 890 * or association responses this updates the state of privacy_invoked 891 * returns 0 for success or an error number */ 892 int (*set_privacy_invoked)(struct ieee80211_hw *hw, 893 int privacy_invoked); 894 895 /* For devices that have internal sequence counters, allow 802.11 896 * code to access the current value of a counter */ 897 int (*get_sequence_counter)(struct ieee80211_hw *hw, 898 u8* addr, u8 keyidx, u8 txrx, 899 u32* iv32, u16* iv16); 900 901 /* Configuration of RTS threshold (if device needs it) */ 902 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 903 904 /* Configuration of fragmentation threshold. 905 * Assign this if the device does fragmentation by itself, 906 * if this method is assigned then the stack will not do 907 * fragmentation. */ 908 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 909 910 /* Configuration of retry limits (if device needs it) */ 911 int (*set_retry_limit)(struct ieee80211_hw *hw, 912 u32 short_retry, u32 long_retr); 913 914 /* Number of STAs in STA table notification (NULL = disabled). 915 * Must be atomic. */ 916 void (*sta_table_notification)(struct ieee80211_hw *hw, 917 int num_sta); 918 919 /* Handle ERP IE change notifications. Must be atomic. */ 920 void (*erp_ie_changed)(struct ieee80211_hw *hw, u8 changes, 921 int cts_protection, int preamble); 922 923 /* Flags for the erp_ie_changed changes parameter */ 924#define IEEE80211_ERP_CHANGE_PROTECTION (1<<0) /* protection flag changed */ 925#define IEEE80211_ERP_CHANGE_PREAMBLE (1<<1) /* barker preamble mode changed */ 926 927 /* Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 928 * bursting) for a hardware TX queue. 929 * queue = IEEE80211_TX_QUEUE_*. 930 * Must be atomic. */ 931 int (*conf_tx)(struct ieee80211_hw *hw, int queue, 932 const struct ieee80211_tx_queue_params *params); 933 934 /* Get statistics of the current TX queue status. This is used to get 935 * number of currently queued packets (queue length), maximum queue 936 * size (limit), and total number of packets sent using each TX queue 937 * (count). 938 * Currently unused. */ 939 int (*get_tx_stats)(struct ieee80211_hw *hw, 940 struct ieee80211_tx_queue_stats *stats); 941 942 /* Get the current TSF timer value from firmware/hardware. Currently, 943 * this is only used for IBSS mode debugging and, as such, is not a 944 * required function. 945 * Must be atomic. */ 946 u64 (*get_tsf)(struct ieee80211_hw *hw); 947 948 /* Reset the TSF timer and allow firmware/hardware to synchronize with 949 * other STAs in the IBSS. This is only used in IBSS mode. This 950 * function is optional if the firmware/hardware takes full care of 951 * TSF synchronization. */ 952 void (*reset_tsf)(struct ieee80211_hw *hw); 953 954 /* Setup beacon data for IBSS beacons. Unlike access point (Master), 955 * IBSS uses a fixed beacon frame which is configured using this 956 * function. This handler is required only for IBSS mode. */ 957 int (*beacon_update)(struct ieee80211_hw *hw, 958 struct sk_buff *skb, 959 struct ieee80211_tx_control *control); 960 961 /* Determine whether the last IBSS beacon was sent by us. This is 962 * needed only for IBSS mode and the result of this function is used to 963 * determine whether to reply to Probe Requests. */ 964 int (*tx_last_beacon)(struct ieee80211_hw *hw); 965}; 966 967/* Allocate a new hardware device. This must be called once for each 968 * hardware device. The returned pointer must be used to refer to this 969 * device when calling other functions. 802.11 code allocates a private data 970 * area for the low-level driver. The size of this area is given as 971 * priv_data_len. 972 */ 973struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 974 const struct ieee80211_ops *ops); 975 976/* Register hardware device to the IEEE 802.11 code and kernel. Low-level 977 * drivers must call this function before using any other IEEE 802.11 978 * function except ieee80211_register_hwmode. */ 979int ieee80211_register_hw(struct ieee80211_hw *hw); 980 981/* driver can use this and ieee80211_get_rx_led_name to get the 982 * name of the registered LEDs after ieee80211_register_hw 983 * was called. 984 * This is useful to set the default trigger on the LED class 985 * device that your driver should export for each LED the device 986 * has, that way the default behaviour will be as expected but 987 * the user can still change it/turn off the LED etc. 988 */ 989#ifdef CONFIG_MAC80211_LEDS 990extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 991extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 992#endif 993static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 994{ 995#ifdef CONFIG_MAC80211_LEDS 996 return __ieee80211_get_tx_led_name(hw); 997#else 998 return NULL; 999#endif 1000} 1001 1002static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 1003{ 1004#ifdef CONFIG_MAC80211_LEDS 1005 return __ieee80211_get_rx_led_name(hw); 1006#else 1007 return NULL; 1008#endif 1009} 1010 1011/* Register a new hardware PHYMODE capability to the stack. */ 1012int ieee80211_register_hwmode(struct ieee80211_hw *hw, 1013 struct ieee80211_hw_mode *mode); 1014 1015/* Unregister a hardware device. This function instructs 802.11 code to free 1016 * allocated resources and unregister netdevices from the kernel. */ 1017void ieee80211_unregister_hw(struct ieee80211_hw *hw); 1018 1019/* Free everything that was allocated including private data of a driver. */ 1020void ieee80211_free_hw(struct ieee80211_hw *hw); 1021 1022/* Receive frame callback function. The low-level driver uses this function to 1023 * send received frames to the IEEE 802.11 code. Receive buffer (skb) must 1024 * start with IEEE 802.11 header. */ 1025void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, 1026 struct ieee80211_rx_status *status); 1027void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, 1028 struct sk_buff *skb, 1029 struct ieee80211_rx_status *status); 1030 1031/* Transmit status callback function. The low-level driver must call this 1032 * function to report transmit status for all the TX frames that had 1033 * req_tx_status set in the transmit control fields. In addition, this should 1034 * be called at least for all unicast frames to provide information for TX rate 1035 * control algorithm. In order to maintain all statistics, this function is 1036 * recommended to be called after each frame, including multicast/broadcast, is 1037 * sent. */ 1038void ieee80211_tx_status(struct ieee80211_hw *hw, 1039 struct sk_buff *skb, 1040 struct ieee80211_tx_status *status); 1041void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 1042 struct sk_buff *skb, 1043 struct ieee80211_tx_status *status); 1044 1045/** 1046 * ieee80211_beacon_get - beacon generation function 1047 * @hw: pointer obtained from ieee80211_alloc_hw(). 1048 * @if_id: interface ID from &struct ieee80211_if_init_conf. 1049 * @control: will be filled with information needed to send this beacon. 1050 * 1051 * If the beacon frames are generated by the host system (i.e., not in 1052 * hardware/firmware), the low-level driver uses this function to receive 1053 * the next beacon frame from the 802.11 code. The low-level is responsible 1054 * for calling this function before beacon data is needed (e.g., based on 1055 * hardware interrupt). Returned skb is used only once and low-level driver 1056 * is responsible of freeing it. 1057 */ 1058struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 1059 int if_id, 1060 struct ieee80211_tx_control *control); 1061 1062/** 1063 * ieee80211_rts_get - RTS frame generation function 1064 * @hw: pointer obtained from ieee80211_alloc_hw(). 1065 * @if_id: interface ID from &struct ieee80211_if_init_conf. 1066 * @frame: pointer to the frame that is going to be protected by the RTS. 1067 * @frame_len: the frame length (in octets). 1068 * @frame_txctl: &struct ieee80211_tx_control of the frame. 1069 * @rts: The buffer where to store the RTS frame. 1070 * 1071 * If the RTS frames are generated by the host system (i.e., not in 1072 * hardware/firmware), the low-level driver uses this function to receive 1073 * the next RTS frame from the 802.11 code. The low-level is responsible 1074 * for calling this function before and RTS frame is needed. 1075 */ 1076void ieee80211_rts_get(struct ieee80211_hw *hw, int if_id, 1077 const void *frame, size_t frame_len, 1078 const struct ieee80211_tx_control *frame_txctl, 1079 struct ieee80211_rts *rts); 1080 1081/** 1082 * ieee80211_rts_duration - Get the duration field for an RTS frame 1083 * @hw: pointer obtained from ieee80211_alloc_hw(). 1084 * @if_id: interface ID from &struct ieee80211_if_init_conf. 1085 * @frame_len: the length of the frame that is going to be protected by the RTS. 1086 * @frame_txctl: &struct ieee80211_tx_control of the frame. 1087 * 1088 * If the RTS is generated in firmware, but the host system must provide 1089 * the duration field, the low-level driver uses this function to receive 1090 * the duration field value in little-endian byteorder. 1091 */ 1092__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, int if_id, 1093 size_t frame_len, 1094 const struct ieee80211_tx_control *frame_txctl); 1095 1096/** 1097 * ieee80211_ctstoself_get - CTS-to-self frame generation function 1098 * @hw: pointer obtained from ieee80211_alloc_hw(). 1099 * @if_id: interface ID from &struct ieee80211_if_init_conf. 1100 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 1101 * @frame_len: the frame length (in octets). 1102 * @frame_txctl: &struct ieee80211_tx_control of the frame. 1103 * @cts: The buffer where to store the CTS-to-self frame. 1104 * 1105 * If the CTS-to-self frames are generated by the host system (i.e., not in 1106 * hardware/firmware), the low-level driver uses this function to receive 1107 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 1108 * for calling this function before and CTS-to-self frame is needed. 1109 */ 1110void ieee80211_ctstoself_get(struct ieee80211_hw *hw, int if_id, 1111 const void *frame, size_t frame_len, 1112 const struct ieee80211_tx_control *frame_txctl, 1113 struct ieee80211_cts *cts); 1114 1115/** 1116 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 1117 * @hw: pointer obtained from ieee80211_alloc_hw(). 1118 * @if_id: interface ID from &struct ieee80211_if_init_conf. 1119 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 1120 * @frame_txctl: &struct ieee80211_tx_control of the frame. 1121 * 1122 * If the CTS-to-self is generated in firmware, but the host system must provide 1123 * the duration field, the low-level driver uses this function to receive 1124 * the duration field value in little-endian byteorder. 1125 */ 1126__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, int if_id, 1127 size_t frame_len, 1128 const struct ieee80211_tx_control *frame_txctl); 1129 1130/** 1131 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 1132 * @hw: pointer obtained from ieee80211_alloc_hw(). 1133 * @if_id: interface ID from &struct ieee80211_if_init_conf. 1134 * @frame_len: the length of the frame. 1135 * @rate: the rate (in 100kbps) at which the frame is going to be transmitted. 1136 * 1137 * Calculate the duration field of some generic frame, given its 1138 * length and transmission rate (in 100kbps). 1139 */ 1140__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, int if_id, 1141 size_t frame_len, 1142 int rate); 1143 1144/** 1145 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 1146 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1147 * @if_id: interface ID from &struct ieee80211_if_init_conf. 1148 * @control: will be filled with information needed to send returned frame. 1149 * 1150 * Function for accessing buffered broadcast and multicast frames. If 1151 * hardware/firmware does not implement buffering of broadcast/multicast 1152 * frames when power saving is used, 802.11 code buffers them in the host 1153 * memory. The low-level driver uses this function to fetch next buffered 1154 * frame. In most cases, this is used when generating beacon frame. This 1155 * function returns a pointer to the next buffered skb or NULL if no more 1156 * buffered frames are available. 1157 * 1158 * Note: buffered frames are returned only after DTIM beacon frame was 1159 * generated with ieee80211_beacon_get() and the low-level driver must thus 1160 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 1161 * NULL if the previous generated beacon was not DTIM, so the low-level driver 1162 * does not need to check for DTIM beacons separately and should be able to 1163 * use common code for all beacons. 1164 */ 1165struct sk_buff * 1166ieee80211_get_buffered_bc(struct ieee80211_hw *hw, int if_id, 1167 struct ieee80211_tx_control *control); 1168 1169/* Given an sk_buff with a raw 802.11 header at the data pointer this function 1170 * returns the 802.11 header length in bytes (not including encryption 1171 * headers). If the data in the sk_buff is too short to contain a valid 802.11 1172 * header the function returns 0. 1173 */ 1174int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb); 1175 1176/* Like ieee80211_get_hdrlen_from_skb() but takes a FC in CPU order. */ 1177int ieee80211_get_hdrlen(u16 fc); 1178 1179/** 1180 * ieee80211_wake_queue - wake specific queue 1181 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1182 * @queue: queue number (counted from zero). 1183 * 1184 * Drivers should use this function instead of netif_wake_queue. 1185 */ 1186void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 1187 1188/** 1189 * ieee80211_stop_queue - stop specific queue 1190 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1191 * @queue: queue number (counted from zero). 1192 * 1193 * Drivers should use this function instead of netif_stop_queue. 1194 */ 1195void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 1196 1197/** 1198 * ieee80211_start_queues - start all queues 1199 * @hw: pointer to as obtained from ieee80211_alloc_hw(). 1200 * 1201 * Drivers should use this function instead of netif_start_queue. 1202 */ 1203void ieee80211_start_queues(struct ieee80211_hw *hw); 1204 1205/** 1206 * ieee80211_stop_queues - stop all queues 1207 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1208 * 1209 * Drivers should use this function instead of netif_stop_queue. 1210 */ 1211void ieee80211_stop_queues(struct ieee80211_hw *hw); 1212 1213/** 1214 * ieee80211_wake_queues - wake all queues 1215 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1216 * 1217 * Drivers should use this function instead of netif_wake_queue. 1218 */ 1219void ieee80211_wake_queues(struct ieee80211_hw *hw); 1220 1221/* called by driver to notify scan status completed */ 1222void ieee80211_scan_completed(struct ieee80211_hw *hw); 1223 1224/* return a pointer to the source address (SA) */ 1225static inline u8 *ieee80211_get_SA(struct ieee80211_hdr *hdr) 1226{ 1227 u8 *raw = (u8 *) hdr; 1228 u8 tofrom = (*(raw+1)) & 3; /* get the TODS and FROMDS bits */ 1229 1230 switch (tofrom) { 1231 case 2: 1232 return hdr->addr3; 1233 case 3: 1234 return hdr->addr4; 1235 } 1236 return hdr->addr2; 1237} 1238 1239/* return a pointer to the destination address (DA) */ 1240static inline u8 *ieee80211_get_DA(struct ieee80211_hdr *hdr) 1241{ 1242 u8 *raw = (u8 *) hdr; 1243 u8 to_ds = (*(raw+1)) & 1; /* get the TODS bit */ 1244 1245 if (to_ds) 1246 return hdr->addr3; 1247 return hdr->addr1; 1248} 1249 1250static inline int ieee80211_get_morefrag(struct ieee80211_hdr *hdr) 1251{ 1252 return (le16_to_cpu(hdr->frame_control) & 1253 IEEE80211_FCTL_MOREFRAGS) != 0; 1254} 1255 1256#endif /* MAC80211_H */ 1257