mac80211.h revision 6a7664d451e7014b1a6828e50ccb3308d0b84816
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/* 802.11g is backwards-compatible with 802.11b, so a wlan card can 102 * actually be both in 11b and 11g modes at the same time. */ 103enum ieee80211_phymode { 104 MODE_IEEE80211A, /* IEEE 802.11a */ 105 MODE_IEEE80211B, /* IEEE 802.11b only */ 106 MODE_IEEE80211G, /* IEEE 802.11g (and 802.11b compatibility) */ 107 108 /* keep last */ 109 NUM_IEEE80211_MODES 110}; 111 112struct ieee80211_hw_mode { 113 int mode; /* MODE_IEEE80211... */ 114 int num_channels; /* Number of channels (below) */ 115 struct ieee80211_channel *channels; /* Array of supported channels */ 116 int num_rates; /* Number of rates (below) */ 117 struct ieee80211_rate *rates; /* Array of supported rates */ 118 119 struct list_head list; /* Internal, don't touch */ 120}; 121 122struct ieee80211_tx_queue_params { 123 int aifs; /* 0 .. 255; -1 = use default */ 124 int cw_min; /* 2^n-1: 1, 3, 7, .. , 1023; 0 = use default */ 125 int cw_max; /* 2^n-1: 1, 3, 7, .. , 1023; 0 = use default */ 126 int burst_time; /* maximum burst time in 0.1 ms (i.e., 10 = 1 ms); 127 * 0 = disabled */ 128}; 129 130struct ieee80211_tx_queue_stats_data { 131 unsigned int len; /* num packets in queue */ 132 unsigned int limit; /* queue len (soft) limit */ 133 unsigned int count; /* total num frames sent */ 134}; 135 136enum { 137 IEEE80211_TX_QUEUE_DATA0, 138 IEEE80211_TX_QUEUE_DATA1, 139 IEEE80211_TX_QUEUE_DATA2, 140 IEEE80211_TX_QUEUE_DATA3, 141 IEEE80211_TX_QUEUE_DATA4, 142 IEEE80211_TX_QUEUE_SVP, 143 144 NUM_TX_DATA_QUEUES, 145 146/* due to stupidity in the sub-ioctl userspace interface, the items in 147 * this struct need to have fixed values. As soon as it is removed, we can 148 * fix these entries. */ 149 IEEE80211_TX_QUEUE_AFTER_BEACON = 6, 150 IEEE80211_TX_QUEUE_BEACON = 7 151}; 152 153struct ieee80211_tx_queue_stats { 154 struct ieee80211_tx_queue_stats_data data[NUM_TX_DATA_QUEUES]; 155}; 156 157struct ieee80211_low_level_stats { 158 unsigned int dot11ACKFailureCount; 159 unsigned int dot11RTSFailureCount; 160 unsigned int dot11FCSErrorCount; 161 unsigned int dot11RTSSuccessCount; 162}; 163 164/* Transmit control fields. This data structure is passed to low-level driver 165 * with each TX frame. The low-level driver is responsible for configuring 166 * the hardware to use given values (depending on what is supported). */ 167 168struct ieee80211_tx_control { 169 int tx_rate; /* Transmit rate, given as the hw specific value for the 170 * rate (from struct ieee80211_rate) */ 171 int rts_cts_rate; /* Transmit rate for RTS/CTS frame, given as the hw 172 * specific value for the rate (from 173 * struct ieee80211_rate) */ 174 175#define IEEE80211_TXCTL_REQ_TX_STATUS (1<<0)/* request TX status callback for 176 * this frame */ 177#define IEEE80211_TXCTL_DO_NOT_ENCRYPT (1<<1) /* send this frame without 178 * encryption; e.g., for EAPOL 179 * frames */ 180#define IEEE80211_TXCTL_USE_RTS_CTS (1<<2) /* use RTS-CTS before sending 181 * frame */ 182#define IEEE80211_TXCTL_USE_CTS_PROTECT (1<<3) /* use CTS protection for the 183 * frame (e.g., for combined 184 * 802.11g / 802.11b networks) */ 185#define IEEE80211_TXCTL_NO_ACK (1<<4) /* tell the low level not to 186 * wait for an ack */ 187#define IEEE80211_TXCTL_RATE_CTRL_PROBE (1<<5) 188#define IEEE80211_TXCTL_CLEAR_DST_MASK (1<<6) 189#define IEEE80211_TXCTL_REQUEUE (1<<7) 190#define IEEE80211_TXCTL_FIRST_FRAGMENT (1<<8) /* this is a first fragment of 191 * the frame */ 192#define IEEE80211_TXCTL_TKIP_NEW_PHASE1_KEY (1<<9) 193#define IEEE80211_TXCTL_LONG_RETRY_LIMIT (1<<10) /* this frame should be send 194 * using the through 195 * set_retry_limit configured 196 * long retry value */ 197 u32 flags; /* tx control flags defined 198 * above */ 199 u8 key_idx; /* keyidx from hw->set_key(), undefined if 200 * IEEE80211_TXCTL_DO_NOT_ENCRYPT is set */ 201 u8 retry_limit; /* 1 = only first attempt, 2 = one retry, .. 202 * This could be used when set_retry_limit 203 * is not implemented by the driver */ 204 u8 power_level; /* per-packet transmit power level, in dBm */ 205 u8 antenna_sel_tx; /* 0 = default/diversity, 1 = Ant0, 2 = Ant1 */ 206 u8 icv_len; /* length of the ICV/MIC field in octets */ 207 u8 iv_len; /* length of the IV field in octets */ 208 u8 tkip_key[16]; /* generated phase2/phase1 key for hw TKIP */ 209 u8 queue; /* hardware queue to use for this frame; 210 * 0 = highest, hw->queues-1 = lowest */ 211 u8 sw_retry_attempt; /* number of times hw has tried to 212 * transmit frame (not incl. hw retries) */ 213 214 struct ieee80211_rate *rate; /* internal 80211.o rate */ 215 struct ieee80211_rate *rts_rate; /* internal 80211.o rate 216 * for RTS/CTS */ 217 int alt_retry_rate; /* retry rate for the last retries, given as the 218 * hw specific value for the rate (from 219 * struct ieee80211_rate). To be used to limit 220 * packet dropping when probing higher rates, if hw 221 * supports multiple retry rates. -1 = not used */ 222 int type; /* internal */ 223 int ifindex; /* internal */ 224}; 225 226 227/** 228 * enum mac80211_rx_flags - receive flags 229 * 230 * These flags are used with the @flag member of &struct ieee80211_rx_status. 231 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 232 * Use together with %RX_FLAG_MMIC_STRIPPED. 233 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 234 * @RX_FLAG_RADIOTAP: This frame starts with a radiotap header. 235 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 236 * verification has been done by the hardware. 237 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 238 * If this flag is set, the stack cannot do any replay detection 239 * hence the driver or hardware will have to do that. 240 */ 241enum mac80211_rx_flags { 242 RX_FLAG_MMIC_ERROR = 1<<0, 243 RX_FLAG_DECRYPTED = 1<<1, 244 RX_FLAG_RADIOTAP = 1<<2, 245 RX_FLAG_MMIC_STRIPPED = 1<<3, 246 RX_FLAG_IV_STRIPPED = 1<<4, 247}; 248 249/** 250 * struct ieee80211_rx_status - receive status 251 * 252 * The low-level driver should provide this information (the subset 253 * supported by hardware) to the 802.11 code with each received 254 * frame. 255 * @mactime: MAC timestamp as defined by 802.11 256 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 257 * @channel: channel the radio was tuned to 258 * @phymode: active PHY mode 259 * @ssi: signal strength when receiving this frame 260 * @signal: used as 'qual' in statistics reporting 261 * @noise: PHY noise when receiving this frame 262 * @antenna: antenna used 263 * @rate: data rate 264 * @flag: %RX_FLAG_* 265 */ 266struct ieee80211_rx_status { 267 u64 mactime; 268 int freq; 269 int channel; 270 int phymode; 271 int ssi; 272 int signal; 273 int noise; 274 int antenna; 275 int rate; 276 int flag; 277}; 278 279/* Transmit status. The low-level driver should provide this information 280 * (the subset supported by hardware) to the 802.11 code for each transmit 281 * frame. */ 282struct ieee80211_tx_status { 283 /* copied ieee80211_tx_control structure */ 284 struct ieee80211_tx_control control; 285 286#define IEEE80211_TX_STATUS_TX_FILTERED (1<<0) 287#define IEEE80211_TX_STATUS_ACK (1<<1) /* whether the TX frame was ACKed */ 288 u32 flags; /* tx staus flags defined above */ 289 290 int ack_signal; /* measured signal strength of the ACK frame */ 291 int excessive_retries; 292 int retry_count; 293 294 int queue_length; /* information about TX queue */ 295 int queue_number; 296}; 297 298 299/** 300 * struct ieee80211_conf - configuration of the device 301 * 302 * This struct indicates how the driver shall configure the hardware. 303 * 304 * @radio_enabled: when zero, driver is required to switch off the radio. 305 */ 306struct ieee80211_conf { 307 int channel; /* IEEE 802.11 channel number */ 308 int freq; /* MHz */ 309 int channel_val; /* hw specific value for the channel */ 310 311 int phymode; /* MODE_IEEE80211A, .. */ 312 struct ieee80211_channel *chan; 313 struct ieee80211_hw_mode *mode; 314 unsigned int regulatory_domain; 315 int radio_enabled; 316 317 int beacon_int; 318 319#define IEEE80211_CONF_SHORT_SLOT_TIME (1<<0) /* use IEEE 802.11g Short Slot 320 * Time */ 321#define IEEE80211_CONF_SSID_HIDDEN (1<<1) /* do not broadcast the ssid */ 322#define IEEE80211_CONF_RADIOTAP (1<<2) /* use radiotap if supported 323 check this bit at RX time */ 324 u32 flags; /* configuration flags defined above */ 325 326 u8 power_level; /* transmit power limit for current 327 * regulatory domain; in dBm */ 328 u8 antenna_max; /* maximum antenna gain */ 329 330 /* 0 = default/diversity, 1 = Ant0, 2 = Ant1 */ 331 u8 antenna_sel_tx; 332 u8 antenna_sel_rx; 333}; 334 335/** 336 * enum ieee80211_if_types - types of 802.11 network interfaces 337 * 338 * @IEEE80211_IF_TYPE_AP: interface in AP mode. 339 * @IEEE80211_IF_TYPE_MGMT: special interface for communication with hostap 340 * daemon. Drivers should never see this type. 341 * @IEEE80211_IF_TYPE_STA: interface in STA (client) mode. 342 * @IEEE80211_IF_TYPE_IBSS: interface in IBSS (ad-hoc) mode. 343 * @IEEE80211_IF_TYPE_MNTR: interface in monitor (rfmon) mode. 344 * @IEEE80211_IF_TYPE_WDS: interface in WDS mode. 345 * @IEEE80211_IF_TYPE_VLAN: not used. 346 */ 347enum ieee80211_if_types { 348 IEEE80211_IF_TYPE_AP = 0x00000000, 349 IEEE80211_IF_TYPE_MGMT = 0x00000001, 350 IEEE80211_IF_TYPE_STA = 0x00000002, 351 IEEE80211_IF_TYPE_IBSS = 0x00000003, 352 IEEE80211_IF_TYPE_MNTR = 0x00000004, 353 IEEE80211_IF_TYPE_WDS = 0x5A580211, 354 IEEE80211_IF_TYPE_VLAN = 0x00080211, 355}; 356 357/** 358 * struct ieee80211_if_init_conf - initial configuration of an interface 359 * 360 * @if_id: internal interface ID. This number has no particular meaning to 361 * drivers and the only allowed usage is to pass it to 362 * ieee80211_beacon_get() and ieee80211_get_buffered_bc() functions. 363 * This field is not valid for monitor interfaces 364 * (interfaces of %IEEE80211_IF_TYPE_MNTR type). 365 * @type: one of &enum ieee80211_if_types constants. Determines the type of 366 * added/removed interface. 367 * @mac_addr: pointer to MAC address of the interface. This pointer is valid 368 * until the interface is removed (i.e. it cannot be used after 369 * remove_interface() callback was called for this interface). 370 * This pointer will be %NULL for monitor interfaces, be careful. 371 * 372 * This structure is used in add_interface() and remove_interface() 373 * callbacks of &struct ieee80211_hw. 374 * 375 * When you allow multiple interfaces to be added to your PHY, take care 376 * that the hardware can actually handle multiple MAC addresses. However, 377 * also take care that when there's no interface left with mac_addr != %NULL 378 * you remove the MAC address from the device to avoid acknowledging packets 379 * in pure monitor mode. 380 */ 381struct ieee80211_if_init_conf { 382 int if_id; 383 int type; 384 void *mac_addr; 385}; 386 387/** 388 * struct ieee80211_if_conf - configuration of an interface 389 * 390 * @type: type of the interface. This is always the same as was specified in 391 * &struct ieee80211_if_init_conf. The type of an interface never changes 392 * during the life of the interface; this field is present only for 393 * convenience. 394 * @bssid: BSSID of the network we are associated to/creating. 395 * @ssid: used (together with @ssid_len) by drivers for hardware that 396 * generate beacons independently. The pointer is valid only during the 397 * config_interface() call, so copy the value somewhere if you need 398 * it. 399 * @ssid_len: length of the @ssid field. 400 * @generic_elem: used (together with @generic_elem_len) by drivers for 401 * hardware that generate beacons independently. The pointer is valid 402 * only during the config_interface() call, so copy the value somewhere 403 * if you need it. 404 * @generic_elem_len: length of the generic element. 405 * @beacon: beacon template. Valid only if @host_gen_beacon_template in 406 * &struct ieee80211_hw is set. The driver is responsible of freeing 407 * the sk_buff. 408 * @beacon_control: tx_control for the beacon template, this field is only 409 * valid when the @beacon field was set. 410 * 411 * This structure is passed to the config_interface() callback of 412 * &struct ieee80211_hw. 413 */ 414struct ieee80211_if_conf { 415 int type; 416 u8 *bssid; 417 u8 *ssid; 418 size_t ssid_len; 419 u8 *generic_elem; 420 size_t generic_elem_len; 421 struct sk_buff *beacon; 422 struct ieee80211_tx_control *beacon_control; 423}; 424 425/** 426 * enum ieee80211_key_alg - key algorithm 427 * @ALG_NONE: Unset key algorithm, will never be passed to the driver 428 * @ALG_WEP: WEP40 or WEP104 429 * @ALG_TKIP: TKIP 430 * @ALG_CCMP: CCMP (AES) 431 */ 432typedef enum ieee80211_key_alg { 433 ALG_NONE, 434 ALG_WEP, 435 ALG_TKIP, 436 ALG_CCMP, 437} ieee80211_key_alg; 438 439 440/** 441 * enum ieee80211_key_flags - key flags 442 * 443 * These flags are used for communication about keys between the driver 444 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 445 * 446 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 447 * that the STA this key will be used with could be using QoS. 448 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 449 * driver to indicate that it requires IV generation for this 450 * particular key. 451 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 452 * the driver for a TKIP key if it requires Michael MIC 453 * generation in software. 454 */ 455enum ieee80211_key_flags { 456 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 457 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 458 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 459}; 460 461/** 462 * struct ieee80211_key_conf - key information 463 * 464 * This key information is given by mac80211 to the driver by 465 * the set_key() callback in &struct ieee80211_ops. 466 * 467 * @hw_key_idx: To be set by the driver, this is the key index the driver 468 * wants to be given when a frame is transmitted and needs to be 469 * encrypted in hardware. 470 * @alg: The key algorithm. 471 * @flags: key flags, see &enum ieee80211_key_flags. 472 * @keyidx: the key index (0-3) 473 * @keylen: key material length 474 * @key: key material 475 */ 476struct ieee80211_key_conf { 477 ieee80211_key_alg alg; 478 u8 hw_key_idx; 479 u8 flags; 480 s8 keyidx; 481 u8 keylen; 482 u8 key[0]; 483}; 484 485#define IEEE80211_SEQ_COUNTER_RX 0 486#define IEEE80211_SEQ_COUNTER_TX 1 487 488/** 489 * enum set_key_cmd - key command 490 * 491 * Used with the set_key() callback in &struct ieee80211_ops, this 492 * indicates whether a key is being removed or added. 493 * 494 * @SET_KEY: a key is set 495 * @DISABLE_KEY: a key must be disabled 496 */ 497typedef enum set_key_cmd { 498 SET_KEY, DISABLE_KEY, 499} set_key_cmd; 500 501/** 502 * struct ieee80211_hw - hardware information and state 503 * TODO: move documentation into kernel-doc format 504 */ 505struct ieee80211_hw { 506 /* points to the cfg80211 wiphy for this piece. Note 507 * that you must fill in the perm_addr and dev fields 508 * of this structure, use the macros provided below. */ 509 struct wiphy *wiphy; 510 511 /* assigned by mac80211, don't write */ 512 struct ieee80211_conf conf; 513 514 /* Single thread workqueue available for driver use 515 * Allocated by mac80211 on registration */ 516 struct workqueue_struct *workqueue; 517 518 /* Pointer to the private area that was 519 * allocated with this struct for you. */ 520 void *priv; 521 522 /* The rest is information about your hardware */ 523 524 /* TODO: frame_type 802.11/802.3, sw_encryption requirements */ 525 526/* hole at 0 */ 527 528 /* 529 * The device only needs to be supplied with a beacon template. 530 * If you need the host to generate each beacon then don't use 531 * this flag and use ieee80211_beacon_get(). 532 */ 533#define IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE (1<<1) 534 535/* hole at 2 */ 536 537 /* Whether RX frames passed to ieee80211_rx() include FCS in the end */ 538#define IEEE80211_HW_RX_INCLUDES_FCS (1<<3) 539 540 /* Some wireless LAN chipsets buffer broadcast/multicast frames for 541 * power saving stations in the hardware/firmware and others rely on 542 * the host system for such buffering. This option is used to 543 * configure the IEEE 802.11 upper layer to buffer broadcast/multicast 544 * frames when there are power saving stations so that low-level driver 545 * can fetch them with ieee80211_get_buffered_bc(). */ 546#define IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING (1<<4) 547 548/* hole at 5 */ 549 550/* hole at 6 */ 551 552/* hole at 7 */ 553 554/* hole at 8 */ 555 556 /* Device is capable of performing full monitor mode even during 557 * normal operation. */ 558#define IEEE80211_HW_MONITOR_DURING_OPER (1<<9) 559 560 /* Device does not need BSSID filter set to broadcast in order to 561 * receive all probe responses while scanning */ 562#define IEEE80211_HW_NO_PROBE_FILTERING (1<<10) 563 564 /* Channels are already configured to the default regulatory domain 565 * specified in the device's EEPROM */ 566#define IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED (1<<11) 567 568 /* Do TKIP phase1 key mixing in stack to support cards only do 569 * phase2 key mixing when doing hwcrypto */ 570#define IEEE80211_HW_TKIP_REQ_PHASE1_KEY (1<<13) 571 /* Do TKIP phase1 and phase2 key mixing in stack and send the generated 572 * per-packet RC4 key with each TX frame when doing hwcrypto */ 573#define IEEE80211_HW_TKIP_REQ_PHASE2_KEY (1<<14) 574 575 u32 flags; /* hardware flags defined above */ 576 577 /* Set to the size of a needed device specific skb headroom for TX skbs. */ 578 unsigned int extra_tx_headroom; 579 580 /* This is the time in us to change channels 581 */ 582 int channel_change_time; 583 /* Maximum values for various statistics. 584 * Leave at 0 to indicate no support. Use negative numbers for dBm. */ 585 s8 max_rssi; 586 s8 max_signal; 587 s8 max_noise; 588 589 /* Number of available hardware TX queues for data packets. 590 * WMM requires at least four queues. */ 591 int queues; 592}; 593 594static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 595{ 596 set_wiphy_dev(hw->wiphy, dev); 597} 598 599static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 600{ 601 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 602} 603 604/* Configuration block used by the low-level driver to tell the 802.11 code 605 * about supported hardware features and to pass function pointers to callback 606 * functions. */ 607struct ieee80211_ops { 608 /* Handler that 802.11 module calls for each transmitted frame. 609 * skb contains the buffer starting from the IEEE 802.11 header. 610 * The low-level driver should send the frame out based on 611 * configuration in the TX control data. 612 * Must be atomic. */ 613 int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb, 614 struct ieee80211_tx_control *control); 615 616 /* Handler that is called when any netdevice attached to the hardware 617 * device is set UP for the first time. This can be used, e.g., to 618 * enable interrupts and beacon sending. */ 619 int (*open)(struct ieee80211_hw *hw); 620 621 /* Handler that is called when the last netdevice attached to the 622 * hardware device is set DOWN. This can be used, e.g., to disable 623 * interrupts and beacon sending. */ 624 int (*stop)(struct ieee80211_hw *hw); 625 626 /* Handler for asking a driver if a new interface can be added (or, 627 * more exactly, set UP). If the handler returns zero, the interface 628 * is added. Driver should perform any initialization it needs prior 629 * to returning zero. By returning non-zero addition of the interface 630 * is inhibited. Unless monitor_during_oper is set, it is guaranteed 631 * that monitor interfaces and normal interfaces are mutually 632 * exclusive. If assigned, the open() handler is called after 633 * add_interface() if this is the first device added. The 634 * add_interface() callback has to be assigned because it is the only 635 * way to obtain the requested MAC address for any interface. 636 */ 637 int (*add_interface)(struct ieee80211_hw *hw, 638 struct ieee80211_if_init_conf *conf); 639 640 /* Notify a driver that an interface is going down. The stop() handler 641 * is called prior to this if this is a last interface. */ 642 void (*remove_interface)(struct ieee80211_hw *hw, 643 struct ieee80211_if_init_conf *conf); 644 645 /* Handler for configuration requests. IEEE 802.11 code calls this 646 * function to change hardware configuration, e.g., channel. */ 647 int (*config)(struct ieee80211_hw *hw, struct ieee80211_conf *conf); 648 649 /* Handler for configuration requests related to interfaces (e.g. 650 * BSSID). */ 651 int (*config_interface)(struct ieee80211_hw *hw, 652 int if_id, struct ieee80211_if_conf *conf); 653 654 /* ieee80211 drivers do not have access to the &struct net_device 655 * that is (are) connected with their device. Hence (and because 656 * we need to combine the multicast lists and flags for multiple 657 * virtual interfaces), they cannot assign set_multicast_list. 658 * The parameters here replace dev->flags and dev->mc_count, 659 * dev->mc_list is replaced by calling ieee80211_get_mc_list_item. 660 * Must be atomic. */ 661 void (*set_multicast_list)(struct ieee80211_hw *hw, 662 unsigned short flags, int mc_count); 663 664 /* Set TIM bit handler. If the hardware/firmware takes care of beacon 665 * generation, IEEE 802.11 code uses this function to tell the 666 * low-level to set (or clear if set==0) TIM bit for the given aid. If 667 * host system is used to generate beacons, this handler is not used 668 * and low-level driver should set it to NULL. 669 * Must be atomic. */ 670 int (*set_tim)(struct ieee80211_hw *hw, int aid, int set); 671 672 /* 673 * Set encryption key. 674 * 675 * This is called to enable hardware acceleration of encryption and 676 * decryption. The address will be the broadcast address for default 677 * keys, the other station's hardware address for individual keys or 678 * the zero address for keys that will be used only for transmission. 679 * 680 * The local_address parameter will always be set to our own address, 681 * this is only relevant if you support multiple local addresses. 682 * 683 * When transmitting, the TX control data will use the hw_key_idx 684 * selected by the low-level driver. 685 * 686 * Return 0 if the key is now in use, -EOPNOTSUPP or -ENOSPC if it 687 * couldn't be added; if you return 0 then hw_key_idx must be assigned 688 * to the hardware key index, you are free to use the full u8 range. 689 * 690 * When the cmd is DISABLE_KEY then it must succeed. 691 * 692 * Note that it is permissible to not decrypt a frame even if a key 693 * for it has been uploaded to hardware, the stack will not make any 694 * decision based on whether a key has been uploaded or not but rather 695 * based on the receive flags. 696 * 697 * This callback can sleep, and is only called between add_interface 698 * and remove_interface calls, i.e. while the interface with the 699 * given local_address is enabled. 700 * 701 * The ieee80211_key_conf structure pointed to by the key parameter 702 * is guaranteed to be valid until another call to set_key removes 703 * it, but it can only be used as a cookie to differentiate keys. 704 */ 705 int (*set_key)(struct ieee80211_hw *hw, set_key_cmd cmd, 706 const u8 *local_address, const u8 *address, 707 struct ieee80211_key_conf *key); 708 709 /* Enable/disable IEEE 802.1X. This item requests wlan card to pass 710 * unencrypted EAPOL-Key frames even when encryption is configured. 711 * If the wlan card does not require such a configuration, this 712 * function pointer can be set to NULL. */ 713 int (*set_ieee8021x)(struct ieee80211_hw *hw, int use_ieee8021x); 714 715 /* Set port authorization state (IEEE 802.1X PAE) to be authorized 716 * (authorized=1) or unauthorized (authorized=0). This function can be 717 * used if the wlan hardware or low-level driver implements PAE. 718 * 80211.o module will anyway filter frames based on authorization 719 * state, so this function pointer can be NULL if low-level driver does 720 * not require event notification about port state changes. 721 * Currently unused. */ 722 int (*set_port_auth)(struct ieee80211_hw *hw, u8 *addr, 723 int authorized); 724 725 /* Ask the hardware to service the scan request, no need to start 726 * the scan state machine in stack. */ 727 int (*hw_scan)(struct ieee80211_hw *hw, u8 *ssid, size_t len); 728 729 /* return low-level statistics */ 730 int (*get_stats)(struct ieee80211_hw *hw, 731 struct ieee80211_low_level_stats *stats); 732 733 /* For devices that generate their own beacons and probe response 734 * or association responses this updates the state of privacy_invoked 735 * returns 0 for success or an error number */ 736 int (*set_privacy_invoked)(struct ieee80211_hw *hw, 737 int privacy_invoked); 738 739 /* For devices that have internal sequence counters, allow 802.11 740 * code to access the current value of a counter */ 741 int (*get_sequence_counter)(struct ieee80211_hw *hw, 742 u8* addr, u8 keyidx, u8 txrx, 743 u32* iv32, u16* iv16); 744 745 /* Configuration of RTS threshold (if device needs it) */ 746 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 747 748 /* Configuration of fragmentation threshold. 749 * Assign this if the device does fragmentation by itself, 750 * if this method is assigned then the stack will not do 751 * fragmentation. */ 752 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 753 754 /* Configuration of retry limits (if device needs it) */ 755 int (*set_retry_limit)(struct ieee80211_hw *hw, 756 u32 short_retry, u32 long_retr); 757 758 /* Number of STAs in STA table notification (NULL = disabled). 759 * Must be atomic. */ 760 void (*sta_table_notification)(struct ieee80211_hw *hw, 761 int num_sta); 762 763 /* Handle ERP IE change notifications. Must be atomic. */ 764 void (*erp_ie_changed)(struct ieee80211_hw *hw, u8 changes, 765 int cts_protection, int preamble); 766 767 /* Flags for the erp_ie_changed changes parameter */ 768#define IEEE80211_ERP_CHANGE_PROTECTION (1<<0) /* protection flag changed */ 769#define IEEE80211_ERP_CHANGE_PREAMBLE (1<<1) /* barker preamble mode changed */ 770 771 /* Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 772 * bursting) for a hardware TX queue. 773 * queue = IEEE80211_TX_QUEUE_*. 774 * Must be atomic. */ 775 int (*conf_tx)(struct ieee80211_hw *hw, int queue, 776 const struct ieee80211_tx_queue_params *params); 777 778 /* Get statistics of the current TX queue status. This is used to get 779 * number of currently queued packets (queue length), maximum queue 780 * size (limit), and total number of packets sent using each TX queue 781 * (count). 782 * Currently unused. */ 783 int (*get_tx_stats)(struct ieee80211_hw *hw, 784 struct ieee80211_tx_queue_stats *stats); 785 786 /* Get the current TSF timer value from firmware/hardware. Currently, 787 * this is only used for IBSS mode debugging and, as such, is not a 788 * required function. 789 * Must be atomic. */ 790 u64 (*get_tsf)(struct ieee80211_hw *hw); 791 792 /* Reset the TSF timer and allow firmware/hardware to synchronize with 793 * other STAs in the IBSS. This is only used in IBSS mode. This 794 * function is optional if the firmware/hardware takes full care of 795 * TSF synchronization. */ 796 void (*reset_tsf)(struct ieee80211_hw *hw); 797 798 /* Setup beacon data for IBSS beacons. Unlike access point (Master), 799 * IBSS uses a fixed beacon frame which is configured using this 800 * function. This handler is required only for IBSS mode. */ 801 int (*beacon_update)(struct ieee80211_hw *hw, 802 struct sk_buff *skb, 803 struct ieee80211_tx_control *control); 804 805 /* Determine whether the last IBSS beacon was sent by us. This is 806 * needed only for IBSS mode and the result of this function is used to 807 * determine whether to reply to Probe Requests. */ 808 int (*tx_last_beacon)(struct ieee80211_hw *hw); 809}; 810 811/* Allocate a new hardware device. This must be called once for each 812 * hardware device. The returned pointer must be used to refer to this 813 * device when calling other functions. 802.11 code allocates a private data 814 * area for the low-level driver. The size of this area is given as 815 * priv_data_len. 816 */ 817struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 818 const struct ieee80211_ops *ops); 819 820/* Register hardware device to the IEEE 802.11 code and kernel. Low-level 821 * drivers must call this function before using any other IEEE 802.11 822 * function except ieee80211_register_hwmode. */ 823int ieee80211_register_hw(struct ieee80211_hw *hw); 824 825/* driver can use this and ieee80211_get_rx_led_name to get the 826 * name of the registered LEDs after ieee80211_register_hw 827 * was called. 828 * This is useful to set the default trigger on the LED class 829 * device that your driver should export for each LED the device 830 * has, that way the default behaviour will be as expected but 831 * the user can still change it/turn off the LED etc. 832 */ 833#ifdef CONFIG_MAC80211_LEDS 834extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 835extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 836#endif 837static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 838{ 839#ifdef CONFIG_MAC80211_LEDS 840 return __ieee80211_get_tx_led_name(hw); 841#else 842 return NULL; 843#endif 844} 845 846static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 847{ 848#ifdef CONFIG_MAC80211_LEDS 849 return __ieee80211_get_rx_led_name(hw); 850#else 851 return NULL; 852#endif 853} 854 855/* Register a new hardware PHYMODE capability to the stack. */ 856int ieee80211_register_hwmode(struct ieee80211_hw *hw, 857 struct ieee80211_hw_mode *mode); 858 859/* Unregister a hardware device. This function instructs 802.11 code to free 860 * allocated resources and unregister netdevices from the kernel. */ 861void ieee80211_unregister_hw(struct ieee80211_hw *hw); 862 863/* Free everything that was allocated including private data of a driver. */ 864void ieee80211_free_hw(struct ieee80211_hw *hw); 865 866/* Receive frame callback function. The low-level driver uses this function to 867 * send received frames to the IEEE 802.11 code. Receive buffer (skb) must 868 * start with IEEE 802.11 header. */ 869void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, 870 struct ieee80211_rx_status *status); 871void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, 872 struct sk_buff *skb, 873 struct ieee80211_rx_status *status); 874 875/* Transmit status callback function. The low-level driver must call this 876 * function to report transmit status for all the TX frames that had 877 * req_tx_status set in the transmit control fields. In addition, this should 878 * be called at least for all unicast frames to provide information for TX rate 879 * control algorithm. In order to maintain all statistics, this function is 880 * recommended to be called after each frame, including multicast/broadcast, is 881 * sent. */ 882void ieee80211_tx_status(struct ieee80211_hw *hw, 883 struct sk_buff *skb, 884 struct ieee80211_tx_status *status); 885void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 886 struct sk_buff *skb, 887 struct ieee80211_tx_status *status); 888 889/** 890 * ieee80211_beacon_get - beacon generation function 891 * @hw: pointer obtained from ieee80211_alloc_hw(). 892 * @if_id: interface ID from &struct ieee80211_if_init_conf. 893 * @control: will be filled with information needed to send this beacon. 894 * 895 * If the beacon frames are generated by the host system (i.e., not in 896 * hardware/firmware), the low-level driver uses this function to receive 897 * the next beacon frame from the 802.11 code. The low-level is responsible 898 * for calling this function before beacon data is needed (e.g., based on 899 * hardware interrupt). Returned skb is used only once and low-level driver 900 * is responsible of freeing it. 901 */ 902struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 903 int if_id, 904 struct ieee80211_tx_control *control); 905 906/** 907 * ieee80211_rts_get - RTS frame generation function 908 * @hw: pointer obtained from ieee80211_alloc_hw(). 909 * @if_id: interface ID from &struct ieee80211_if_init_conf. 910 * @frame: pointer to the frame that is going to be protected by the RTS. 911 * @frame_len: the frame length (in octets). 912 * @frame_txctl: &struct ieee80211_tx_control of the frame. 913 * @rts: The buffer where to store the RTS frame. 914 * 915 * If the RTS frames are generated by the host system (i.e., not in 916 * hardware/firmware), the low-level driver uses this function to receive 917 * the next RTS frame from the 802.11 code. The low-level is responsible 918 * for calling this function before and RTS frame is needed. 919 */ 920void ieee80211_rts_get(struct ieee80211_hw *hw, int if_id, 921 const void *frame, size_t frame_len, 922 const struct ieee80211_tx_control *frame_txctl, 923 struct ieee80211_rts *rts); 924 925/** 926 * ieee80211_rts_duration - Get the duration field for an RTS frame 927 * @hw: pointer obtained from ieee80211_alloc_hw(). 928 * @if_id: interface ID from &struct ieee80211_if_init_conf. 929 * @frame_len: the length of the frame that is going to be protected by the RTS. 930 * @frame_txctl: &struct ieee80211_tx_control of the frame. 931 * 932 * If the RTS is generated in firmware, but the host system must provide 933 * the duration field, the low-level driver uses this function to receive 934 * the duration field value in little-endian byteorder. 935 */ 936__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, int if_id, 937 size_t frame_len, 938 const struct ieee80211_tx_control *frame_txctl); 939 940/** 941 * ieee80211_ctstoself_get - CTS-to-self frame generation function 942 * @hw: pointer obtained from ieee80211_alloc_hw(). 943 * @if_id: interface ID from &struct ieee80211_if_init_conf. 944 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 945 * @frame_len: the frame length (in octets). 946 * @frame_txctl: &struct ieee80211_tx_control of the frame. 947 * @cts: The buffer where to store the CTS-to-self frame. 948 * 949 * If the CTS-to-self frames are generated by the host system (i.e., not in 950 * hardware/firmware), the low-level driver uses this function to receive 951 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 952 * for calling this function before and CTS-to-self frame is needed. 953 */ 954void ieee80211_ctstoself_get(struct ieee80211_hw *hw, int if_id, 955 const void *frame, size_t frame_len, 956 const struct ieee80211_tx_control *frame_txctl, 957 struct ieee80211_cts *cts); 958 959/** 960 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 961 * @hw: pointer obtained from ieee80211_alloc_hw(). 962 * @if_id: interface ID from &struct ieee80211_if_init_conf. 963 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 964 * @frame_txctl: &struct ieee80211_tx_control of the frame. 965 * 966 * If the CTS-to-self is generated in firmware, but the host system must provide 967 * the duration field, the low-level driver uses this function to receive 968 * the duration field value in little-endian byteorder. 969 */ 970__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, int if_id, 971 size_t frame_len, 972 const struct ieee80211_tx_control *frame_txctl); 973 974/** 975 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 976 * @hw: pointer obtained from ieee80211_alloc_hw(). 977 * @if_id: interface ID from &struct ieee80211_if_init_conf. 978 * @frame_len: the length of the frame. 979 * @rate: the rate (in 100kbps) at which the frame is going to be transmitted. 980 * 981 * Calculate the duration field of some generic frame, given its 982 * length and transmission rate (in 100kbps). 983 */ 984__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, int if_id, 985 size_t frame_len, 986 int rate); 987 988/** 989 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 990 * @hw: pointer as obtained from ieee80211_alloc_hw(). 991 * @if_id: interface ID from &struct ieee80211_if_init_conf. 992 * @control: will be filled with information needed to send returned frame. 993 * 994 * Function for accessing buffered broadcast and multicast frames. If 995 * hardware/firmware does not implement buffering of broadcast/multicast 996 * frames when power saving is used, 802.11 code buffers them in the host 997 * memory. The low-level driver uses this function to fetch next buffered 998 * frame. In most cases, this is used when generating beacon frame. This 999 * function returns a pointer to the next buffered skb or NULL if no more 1000 * buffered frames are available. 1001 * 1002 * Note: buffered frames are returned only after DTIM beacon frame was 1003 * generated with ieee80211_beacon_get() and the low-level driver must thus 1004 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 1005 * NULL if the previous generated beacon was not DTIM, so the low-level driver 1006 * does not need to check for DTIM beacons separately and should be able to 1007 * use common code for all beacons. 1008 */ 1009struct sk_buff * 1010ieee80211_get_buffered_bc(struct ieee80211_hw *hw, int if_id, 1011 struct ieee80211_tx_control *control); 1012 1013/* Given an sk_buff with a raw 802.11 header at the data pointer this function 1014 * returns the 802.11 header length in bytes (not including encryption 1015 * headers). If the data in the sk_buff is too short to contain a valid 802.11 1016 * header the function returns 0. 1017 */ 1018int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb); 1019 1020/* Like ieee80211_get_hdrlen_from_skb() but takes a FC in CPU order. */ 1021int ieee80211_get_hdrlen(u16 fc); 1022 1023/** 1024 * ieee80211_wake_queue - wake specific queue 1025 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1026 * @queue: queue number (counted from zero). 1027 * 1028 * Drivers should use this function instead of netif_wake_queue. 1029 */ 1030void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 1031 1032/** 1033 * ieee80211_stop_queue - stop specific queue 1034 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1035 * @queue: queue number (counted from zero). 1036 * 1037 * Drivers should use this function instead of netif_stop_queue. 1038 */ 1039void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 1040 1041/** 1042 * ieee80211_start_queues - start all queues 1043 * @hw: pointer to as obtained from ieee80211_alloc_hw(). 1044 * 1045 * Drivers should use this function instead of netif_start_queue. 1046 */ 1047void ieee80211_start_queues(struct ieee80211_hw *hw); 1048 1049/** 1050 * ieee80211_stop_queues - stop all queues 1051 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1052 * 1053 * Drivers should use this function instead of netif_stop_queue. 1054 */ 1055void ieee80211_stop_queues(struct ieee80211_hw *hw); 1056 1057/** 1058 * ieee80211_wake_queues - wake all queues 1059 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1060 * 1061 * Drivers should use this function instead of netif_wake_queue. 1062 */ 1063void ieee80211_wake_queues(struct ieee80211_hw *hw); 1064 1065/** 1066 * ieee80211_get_mc_list_item - iteration over items in multicast list 1067 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1068 * @prev: value returned by previous call to ieee80211_get_mc_list_item() or 1069 * NULL to start a new iteration. 1070 * @ptr: pointer to buffer of void * type for internal usage of 1071 * ieee80211_get_mc_list_item(). 1072 * 1073 * Iterates over items in multicast list of given device. To get the first 1074 * item, pass NULL in @prev and in *@ptr. In subsequent calls, pass the 1075 * value returned by previous call in @prev. Don't alter *@ptr during 1076 * iteration. When there are no more items, NULL is returned. 1077 */ 1078struct dev_mc_list * 1079ieee80211_get_mc_list_item(struct ieee80211_hw *hw, 1080 struct dev_mc_list *prev, 1081 void **ptr); 1082 1083/* called by driver to notify scan status completed */ 1084void ieee80211_scan_completed(struct ieee80211_hw *hw); 1085 1086/* return a pointer to the source address (SA) */ 1087static inline u8 *ieee80211_get_SA(struct ieee80211_hdr *hdr) 1088{ 1089 u8 *raw = (u8 *) hdr; 1090 u8 tofrom = (*(raw+1)) & 3; /* get the TODS and FROMDS bits */ 1091 1092 switch (tofrom) { 1093 case 2: 1094 return hdr->addr3; 1095 case 3: 1096 return hdr->addr4; 1097 } 1098 return hdr->addr2; 1099} 1100 1101/* return a pointer to the destination address (DA) */ 1102static inline u8 *ieee80211_get_DA(struct ieee80211_hdr *hdr) 1103{ 1104 u8 *raw = (u8 *) hdr; 1105 u8 to_ds = (*(raw+1)) & 1; /* get the TODS bit */ 1106 1107 if (to_ds) 1108 return hdr->addr3; 1109 return hdr->addr1; 1110} 1111 1112static inline int ieee80211_get_morefrag(struct ieee80211_hdr *hdr) 1113{ 1114 return (le16_to_cpu(hdr->frame_control) & 1115 IEEE80211_FCTL_MOREFRAGS) != 0; 1116} 1117 1118#define MAC_FMT "%02x:%02x:%02x:%02x:%02x:%02x" 1119#define MAC_ARG(x) ((u8*)(x))[0], ((u8*)(x))[1], ((u8*)(x))[2], \ 1120 ((u8*)(x))[3], ((u8*)(x))[4], ((u8*)(x))[5] 1121 1122#endif /* MAC80211_H */ 1123