mac80211.h revision 7ac1bd6aecc92cfe6ec11891819dd4c26f2f7879
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#define HW_KEY_IDX_INVALID -1 168 169struct ieee80211_tx_control { 170 int tx_rate; /* Transmit rate, given as the hw specific value for the 171 * rate (from struct ieee80211_rate) */ 172 int rts_cts_rate; /* Transmit rate for RTS/CTS frame, given as the hw 173 * specific value for the rate (from 174 * struct ieee80211_rate) */ 175 176#define IEEE80211_TXCTL_REQ_TX_STATUS (1<<0)/* request TX status callback for 177 * this frame */ 178#define IEEE80211_TXCTL_DO_NOT_ENCRYPT (1<<1) /* send this frame without 179 * encryption; e.g., for EAPOL 180 * frames */ 181#define IEEE80211_TXCTL_USE_RTS_CTS (1<<2) /* use RTS-CTS before sending 182 * frame */ 183#define IEEE80211_TXCTL_USE_CTS_PROTECT (1<<3) /* use CTS protection for the 184 * frame (e.g., for combined 185 * 802.11g / 802.11b networks) */ 186#define IEEE80211_TXCTL_NO_ACK (1<<4) /* tell the low level not to 187 * wait for an ack */ 188#define IEEE80211_TXCTL_RATE_CTRL_PROBE (1<<5) 189#define IEEE80211_TXCTL_CLEAR_DST_MASK (1<<6) 190#define IEEE80211_TXCTL_REQUEUE (1<<7) 191#define IEEE80211_TXCTL_FIRST_FRAGMENT (1<<8) /* this is a first fragment of 192 * the frame */ 193#define IEEE80211_TXCTL_TKIP_NEW_PHASE1_KEY (1<<9) 194#define IEEE80211_TXCTL_LONG_RETRY_LIMIT (1<<10) /* this frame should be send 195 * using the through 196 * set_retry_limit configured 197 * long retry value */ 198 u32 flags; /* tx control flags defined 199 * above */ 200 u8 retry_limit; /* 1 = only first attempt, 2 = one retry, .. 201 * This could be used when set_retry_limit 202 * is not implemented by the driver */ 203 u8 power_level; /* per-packet transmit power level, in dBm */ 204 u8 antenna_sel_tx; /* 0 = default/diversity, 1 = Ant0, 2 = Ant1 */ 205 s8 key_idx; /* HW_KEY_IDX_INVALID = do not encrypt, 206 * other values: keyidx from hw->set_key() */ 207 u8 icv_len; /* length of the ICV/MIC field in octets */ 208 u8 iv_len; /* length of the IV field in octets */ 209 u8 tkip_key[16]; /* generated phase2/phase1 key for hw TKIP */ 210 u8 queue; /* hardware queue to use for this frame; 211 * 0 = highest, hw->queues-1 = lowest */ 212 u8 sw_retry_attempt; /* number of times hw has tried to 213 * transmit frame (not incl. hw retries) */ 214 215 struct ieee80211_rate *rate; /* internal 80211.o rate */ 216 struct ieee80211_rate *rts_rate; /* internal 80211.o rate 217 * for RTS/CTS */ 218 int alt_retry_rate; /* retry rate for the last retries, given as the 219 * hw specific value for the rate (from 220 * struct ieee80211_rate). To be used to limit 221 * packet dropping when probing higher rates, if hw 222 * supports multiple retry rates. -1 = not used */ 223 int type; /* internal */ 224 int ifindex; /* internal */ 225}; 226 227 228/** 229 * enum mac80211_rx_flags - receive flags 230 * 231 * These flags are used with the @flag member of &struct ieee80211_rx_status. 232 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 233 * Use together with %RX_FLAG_MMIC_STRIPPED. 234 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 235 * @RX_FLAG_RADIOTAP: This frame starts with a radiotap header. 236 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 237 * verification has been done by the hardware. 238 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 239 * If this flag is set, the stack cannot do any replay detection 240 * hence the driver or hardware will have to do that. 241 */ 242enum mac80211_rx_flags { 243 RX_FLAG_MMIC_ERROR = 1<<0, 244 RX_FLAG_DECRYPTED = 1<<1, 245 RX_FLAG_RADIOTAP = 1<<2, 246 RX_FLAG_MMIC_STRIPPED = 1<<3, 247 RX_FLAG_IV_STRIPPED = 1<<4, 248}; 249 250/** 251 * struct ieee80211_rx_status - receive status 252 * 253 * The low-level driver should provide this information (the subset 254 * supported by hardware) to the 802.11 code with each received 255 * frame. 256 * @mactime: MAC timestamp as defined by 802.11 257 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 258 * @channel: channel the radio was tuned to 259 * @phymode: active PHY mode 260 * @ssi: signal strength when receiving this frame 261 * @signal: used as 'qual' in statistics reporting 262 * @noise: PHY noise when receiving this frame 263 * @antenna: antenna used 264 * @rate: data rate 265 * @flag: %RX_FLAG_* 266 */ 267struct ieee80211_rx_status { 268 u64 mactime; 269 int freq; 270 int channel; 271 int phymode; 272 int ssi; 273 int signal; 274 int noise; 275 int antenna; 276 int rate; 277 int flag; 278}; 279 280/* Transmit status. The low-level driver should provide this information 281 * (the subset supported by hardware) to the 802.11 code for each transmit 282 * frame. */ 283struct ieee80211_tx_status { 284 /* copied ieee80211_tx_control structure */ 285 struct ieee80211_tx_control control; 286 287#define IEEE80211_TX_STATUS_TX_FILTERED (1<<0) 288#define IEEE80211_TX_STATUS_ACK (1<<1) /* whether the TX frame was ACKed */ 289 u32 flags; /* tx staus flags defined above */ 290 291 int ack_signal; /* measured signal strength of the ACK frame */ 292 int excessive_retries; 293 int retry_count; 294 295 int queue_length; /* information about TX queue */ 296 int queue_number; 297}; 298 299 300/** 301 * struct ieee80211_conf - configuration of the device 302 * 303 * This struct indicates how the driver shall configure the hardware. 304 * 305 * @radio_enabled: when zero, driver is required to switch off the radio. 306 */ 307struct ieee80211_conf { 308 int channel; /* IEEE 802.11 channel number */ 309 int freq; /* MHz */ 310 int channel_val; /* hw specific value for the channel */ 311 312 int phymode; /* MODE_IEEE80211A, .. */ 313 struct ieee80211_channel *chan; 314 struct ieee80211_hw_mode *mode; 315 unsigned int regulatory_domain; 316 int radio_enabled; 317 318 int beacon_int; 319 320#define IEEE80211_CONF_SHORT_SLOT_TIME (1<<0) /* use IEEE 802.11g Short Slot 321 * Time */ 322#define IEEE80211_CONF_SSID_HIDDEN (1<<1) /* do not broadcast the ssid */ 323#define IEEE80211_CONF_RADIOTAP (1<<2) /* use radiotap if supported 324 check this bit at RX time */ 325 u32 flags; /* configuration flags defined above */ 326 327 u8 power_level; /* transmit power limit for current 328 * regulatory domain; in dBm */ 329 u8 antenna_max; /* maximum antenna gain */ 330 331 /* 0 = default/diversity, 1 = Ant0, 2 = Ant1 */ 332 u8 antenna_sel_tx; 333 u8 antenna_sel_rx; 334}; 335 336/** 337 * enum ieee80211_if_types - types of 802.11 network interfaces 338 * 339 * @IEEE80211_IF_TYPE_AP: interface in AP mode. 340 * @IEEE80211_IF_TYPE_MGMT: special interface for communication with hostap 341 * daemon. Drivers should never see this type. 342 * @IEEE80211_IF_TYPE_STA: interface in STA (client) mode. 343 * @IEEE80211_IF_TYPE_IBSS: interface in IBSS (ad-hoc) mode. 344 * @IEEE80211_IF_TYPE_MNTR: interface in monitor (rfmon) mode. 345 * @IEEE80211_IF_TYPE_WDS: interface in WDS mode. 346 * @IEEE80211_IF_TYPE_VLAN: not used. 347 */ 348enum ieee80211_if_types { 349 IEEE80211_IF_TYPE_AP = 0x00000000, 350 IEEE80211_IF_TYPE_MGMT = 0x00000001, 351 IEEE80211_IF_TYPE_STA = 0x00000002, 352 IEEE80211_IF_TYPE_IBSS = 0x00000003, 353 IEEE80211_IF_TYPE_MNTR = 0x00000004, 354 IEEE80211_IF_TYPE_WDS = 0x5A580211, 355 IEEE80211_IF_TYPE_VLAN = 0x00080211, 356}; 357 358/** 359 * struct ieee80211_if_init_conf - initial configuration of an interface 360 * 361 * @if_id: internal interface ID. This number has no particular meaning to 362 * drivers and the only allowed usage is to pass it to 363 * ieee80211_beacon_get() and ieee80211_get_buffered_bc() functions. 364 * This field is not valid for monitor interfaces 365 * (interfaces of %IEEE80211_IF_TYPE_MNTR type). 366 * @type: one of &enum ieee80211_if_types constants. Determines the type of 367 * added/removed interface. 368 * @mac_addr: pointer to MAC address of the interface. This pointer is valid 369 * until the interface is removed (i.e. it cannot be used after 370 * remove_interface() callback was called for this interface). 371 * This pointer will be %NULL for monitor interfaces, be careful. 372 * 373 * This structure is used in add_interface() and remove_interface() 374 * callbacks of &struct ieee80211_hw. 375 * 376 * When you allow multiple interfaces to be added to your PHY, take care 377 * that the hardware can actually handle multiple MAC addresses. However, 378 * also take care that when there's no interface left with mac_addr != %NULL 379 * you remove the MAC address from the device to avoid acknowledging packets 380 * in pure monitor mode. 381 */ 382struct ieee80211_if_init_conf { 383 int if_id; 384 int type; 385 void *mac_addr; 386}; 387 388/** 389 * struct ieee80211_if_conf - configuration of an interface 390 * 391 * @type: type of the interface. This is always the same as was specified in 392 * &struct ieee80211_if_init_conf. The type of an interface never changes 393 * during the life of the interface; this field is present only for 394 * convenience. 395 * @bssid: BSSID of the network we are associated to/creating. 396 * @ssid: used (together with @ssid_len) by drivers for hardware that 397 * generate beacons independently. The pointer is valid only during the 398 * config_interface() call, so copy the value somewhere if you need 399 * it. 400 * @ssid_len: length of the @ssid field. 401 * @generic_elem: used (together with @generic_elem_len) by drivers for 402 * hardware that generate beacons independently. The pointer is valid 403 * only during the config_interface() call, so copy the value somewhere 404 * if you need it. 405 * @generic_elem_len: length of the generic element. 406 * @beacon: beacon template. Valid only if @host_gen_beacon_template in 407 * &struct ieee80211_hw is set. The driver is responsible of freeing 408 * the sk_buff. 409 * @beacon_control: tx_control for the beacon template, this field is only 410 * valid when the @beacon field was set. 411 * 412 * This structure is passed to the config_interface() callback of 413 * &struct ieee80211_hw. 414 */ 415struct ieee80211_if_conf { 416 int type; 417 u8 *bssid; 418 u8 *ssid; 419 size_t ssid_len; 420 u8 *generic_elem; 421 size_t generic_elem_len; 422 struct sk_buff *beacon; 423 struct ieee80211_tx_control *beacon_control; 424}; 425 426/** 427 * enum ieee80211_key_alg - key algorithm 428 * @ALG_NONE: Unset key algorithm, will never be passed to the driver 429 * @ALG_WEP: WEP40 or WEP104 430 * @ALG_TKIP: TKIP 431 * @ALG_CCMP: CCMP (AES) 432 */ 433typedef enum ieee80211_key_alg { 434 ALG_NONE, 435 ALG_WEP, 436 ALG_TKIP, 437 ALG_CCMP, 438} ieee80211_key_alg; 439 440 441/** 442 * enum ieee80211_key_flags - key flags 443 * 444 * These flags are used for communication about keys between the driver 445 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 446 * 447 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 448 * that the STA this key will be used with could be using QoS. 449 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 450 * driver to indicate that it requires IV generation for this 451 * particular key. 452 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 453 * the driver for a TKIP key if it requires Michael MIC 454 * generation in software. 455 */ 456enum ieee80211_key_flags { 457 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 458 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 459 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 460}; 461 462/** 463 * struct ieee80211_key_conf - key information 464 * 465 * This key information is given by mac80211 to the driver by 466 * the set_key() callback in &struct ieee80211_ops. 467 * 468 * @hw_key_idx: To be set by the driver, this is the key index the driver 469 * wants to be given when a frame is transmitted and needs to be 470 * encrypted in hardware. It defaults to %HW_KEY_IDX_INVALID which 471 * the driver may not use. 472 * @alg: The key algorithm. 473 * @flags: key flags, see &enum ieee80211_key_flags. 474 * @keyidx: the key index (0-3) 475 * @keylen: key material length 476 * @key: key material 477 */ 478struct ieee80211_key_conf { 479 int hw_key_idx; 480 ieee80211_key_alg alg; 481 u8 flags; 482 s8 keyidx; 483 u8 keylen; 484 u8 key[0]; 485}; 486 487#define IEEE80211_SEQ_COUNTER_RX 0 488#define IEEE80211_SEQ_COUNTER_TX 1 489 490/** 491 * enum set_key_cmd - key command 492 * 493 * Used with the set_key() callback in &struct ieee80211_ops, this 494 * indicates whether a key is being removed or added. 495 * 496 * @SET_KEY: a key is set 497 * @DISABLE_KEY: a key must be disabled 498 */ 499typedef enum set_key_cmd { 500 SET_KEY, DISABLE_KEY, 501} set_key_cmd; 502 503/** 504 * struct ieee80211_hw - hardware information and state 505 * TODO: move documentation into kernel-doc format 506 */ 507struct ieee80211_hw { 508 /* points to the cfg80211 wiphy for this piece. Note 509 * that you must fill in the perm_addr and dev fields 510 * of this structure, use the macros provided below. */ 511 struct wiphy *wiphy; 512 513 /* assigned by mac80211, don't write */ 514 struct ieee80211_conf conf; 515 516 /* Single thread workqueue available for driver use 517 * Allocated by mac80211 on registration */ 518 struct workqueue_struct *workqueue; 519 520 /* Pointer to the private area that was 521 * allocated with this struct for you. */ 522 void *priv; 523 524 /* The rest is information about your hardware */ 525 526 /* TODO: frame_type 802.11/802.3, sw_encryption requirements */ 527 528/* hole at 0 */ 529 530 /* 531 * The device only needs to be supplied with a beacon template. 532 * If you need the host to generate each beacon then don't use 533 * this flag and use ieee80211_beacon_get(). 534 */ 535#define IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE (1<<1) 536 537/* hole at 2 */ 538 539 /* Whether RX frames passed to ieee80211_rx() include FCS in the end */ 540#define IEEE80211_HW_RX_INCLUDES_FCS (1<<3) 541 542 /* Some wireless LAN chipsets buffer broadcast/multicast frames for 543 * power saving stations in the hardware/firmware and others rely on 544 * the host system for such buffering. This option is used to 545 * configure the IEEE 802.11 upper layer to buffer broadcast/multicast 546 * frames when there are power saving stations so that low-level driver 547 * can fetch them with ieee80211_get_buffered_bc(). */ 548#define IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING (1<<4) 549 550/* hole at 5 */ 551 552/* hole at 6 */ 553 554/* hole at 7 */ 555 556/* hole at 8 */ 557 558 /* Device is capable of performing full monitor mode even during 559 * normal operation. */ 560#define IEEE80211_HW_MONITOR_DURING_OPER (1<<9) 561 562 /* Device does not need BSSID filter set to broadcast in order to 563 * receive all probe responses while scanning */ 564#define IEEE80211_HW_NO_PROBE_FILTERING (1<<10) 565 566 /* Channels are already configured to the default regulatory domain 567 * specified in the device's EEPROM */ 568#define IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED (1<<11) 569 570 /* Do TKIP phase1 key mixing in stack to support cards only do 571 * phase2 key mixing when doing hwcrypto */ 572#define IEEE80211_HW_TKIP_REQ_PHASE1_KEY (1<<13) 573 /* Do TKIP phase1 and phase2 key mixing in stack and send the generated 574 * per-packet RC4 key with each TX frame when doing hwcrypto */ 575#define IEEE80211_HW_TKIP_REQ_PHASE2_KEY (1<<14) 576 577 u32 flags; /* hardware flags defined above */ 578 579 /* Set to the size of a needed device specific skb headroom for TX skbs. */ 580 unsigned int extra_tx_headroom; 581 582 /* This is the time in us to change channels 583 */ 584 int channel_change_time; 585 /* Maximum values for various statistics. 586 * Leave at 0 to indicate no support. Use negative numbers for dBm. */ 587 s8 max_rssi; 588 s8 max_signal; 589 s8 max_noise; 590 591 /* Number of available hardware TX queues for data packets. 592 * WMM requires at least four queues. */ 593 int queues; 594}; 595 596static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 597{ 598 set_wiphy_dev(hw->wiphy, dev); 599} 600 601static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 602{ 603 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 604} 605 606/* Configuration block used by the low-level driver to tell the 802.11 code 607 * about supported hardware features and to pass function pointers to callback 608 * functions. */ 609struct ieee80211_ops { 610 /* Handler that 802.11 module calls for each transmitted frame. 611 * skb contains the buffer starting from the IEEE 802.11 header. 612 * The low-level driver should send the frame out based on 613 * configuration in the TX control data. 614 * Must be atomic. */ 615 int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb, 616 struct ieee80211_tx_control *control); 617 618 /* Handler that is called when any netdevice attached to the hardware 619 * device is set UP for the first time. This can be used, e.g., to 620 * enable interrupts and beacon sending. */ 621 int (*open)(struct ieee80211_hw *hw); 622 623 /* Handler that is called when the last netdevice attached to the 624 * hardware device is set DOWN. This can be used, e.g., to disable 625 * interrupts and beacon sending. */ 626 int (*stop)(struct ieee80211_hw *hw); 627 628 /* Handler for asking a driver if a new interface can be added (or, 629 * more exactly, set UP). If the handler returns zero, the interface 630 * is added. Driver should perform any initialization it needs prior 631 * to returning zero. By returning non-zero addition of the interface 632 * is inhibited. Unless monitor_during_oper is set, it is guaranteed 633 * that monitor interfaces and normal interfaces are mutually 634 * exclusive. If assigned, the open() handler is called after 635 * add_interface() if this is the first device added. The 636 * add_interface() callback has to be assigned because it is the only 637 * way to obtain the requested MAC address for any interface. 638 */ 639 int (*add_interface)(struct ieee80211_hw *hw, 640 struct ieee80211_if_init_conf *conf); 641 642 /* Notify a driver that an interface is going down. The stop() handler 643 * is called prior to this if this is a last interface. */ 644 void (*remove_interface)(struct ieee80211_hw *hw, 645 struct ieee80211_if_init_conf *conf); 646 647 /* Handler for configuration requests. IEEE 802.11 code calls this 648 * function to change hardware configuration, e.g., channel. */ 649 int (*config)(struct ieee80211_hw *hw, struct ieee80211_conf *conf); 650 651 /* Handler for configuration requests related to interfaces (e.g. 652 * BSSID). */ 653 int (*config_interface)(struct ieee80211_hw *hw, 654 int if_id, struct ieee80211_if_conf *conf); 655 656 /* ieee80211 drivers do not have access to the &struct net_device 657 * that is (are) connected with their device. Hence (and because 658 * we need to combine the multicast lists and flags for multiple 659 * virtual interfaces), they cannot assign set_multicast_list. 660 * The parameters here replace dev->flags and dev->mc_count, 661 * dev->mc_list is replaced by calling ieee80211_get_mc_list_item. 662 * Must be atomic. */ 663 void (*set_multicast_list)(struct ieee80211_hw *hw, 664 unsigned short flags, int mc_count); 665 666 /* Set TIM bit handler. If the hardware/firmware takes care of beacon 667 * generation, IEEE 802.11 code uses this function to tell the 668 * low-level to set (or clear if set==0) TIM bit for the given aid. If 669 * host system is used to generate beacons, this handler is not used 670 * and low-level driver should set it to NULL. 671 * Must be atomic. */ 672 int (*set_tim)(struct ieee80211_hw *hw, int aid, int set); 673 674 /* 675 * Set encryption key. 676 * 677 * This is called to enable hardware acceleration of encryption and 678 * decryption. The address will be the broadcast address for default 679 * keys, the other station's hardware address for individual keys or 680 * the zero address for keys that will be used only for transmission. 681 * 682 * The local_address parameter will always be set to our own address, 683 * this is only relevant if you support multiple local addresses. 684 * 685 * When transmitting, the TX control data will use the hw_key_idx 686 * selected by the low-level driver. 687 * 688 * Return 0 if the key is now in use, -EOPNOTSUPP or -ENOSPC if it 689 * couldn't be added; if you return 0 then hw_key_idx must be 690 * assigned to something other than HW_KEY_IDX_INVALID. When the cmd 691 * is DISABLE_KEY then it must succeed. 692 * 693 * Note that it is permissible to not decrypt a frame even if a key 694 * for it has been uploaded to hardware, the stack will not make any 695 * decision based on whether a key has been uploaded or not but rather 696 * based on the receive flags. 697 * 698 * This callback can sleep, and is only called between add_interface 699 * and remove_interface calls, i.e. while the interface with the 700 * given local_address is enabled. 701 * 702 * The ieee80211_key_conf structure pointed to by the key parameter 703 * is guaranteed to be valid until another call to set_key removes 704 * it, but it can only be used as a cookie to differentiate keys. 705 */ 706 int (*set_key)(struct ieee80211_hw *hw, set_key_cmd cmd, 707 const u8 *local_address, const u8 *address, 708 struct ieee80211_key_conf *key); 709 710 /* Enable/disable IEEE 802.1X. This item requests wlan card to pass 711 * unencrypted EAPOL-Key frames even when encryption is configured. 712 * If the wlan card does not require such a configuration, this 713 * function pointer can be set to NULL. */ 714 int (*set_ieee8021x)(struct ieee80211_hw *hw, int use_ieee8021x); 715 716 /* Set port authorization state (IEEE 802.1X PAE) to be authorized 717 * (authorized=1) or unauthorized (authorized=0). This function can be 718 * used if the wlan hardware or low-level driver implements PAE. 719 * 80211.o module will anyway filter frames based on authorization 720 * state, so this function pointer can be NULL if low-level driver does 721 * not require event notification about port state changes. 722 * Currently unused. */ 723 int (*set_port_auth)(struct ieee80211_hw *hw, u8 *addr, 724 int authorized); 725 726 /* Ask the hardware to service the scan request, no need to start 727 * the scan state machine in stack. */ 728 int (*hw_scan)(struct ieee80211_hw *hw, u8 *ssid, size_t len); 729 730 /* return low-level statistics */ 731 int (*get_stats)(struct ieee80211_hw *hw, 732 struct ieee80211_low_level_stats *stats); 733 734 /* For devices that generate their own beacons and probe response 735 * or association responses this updates the state of privacy_invoked 736 * returns 0 for success or an error number */ 737 int (*set_privacy_invoked)(struct ieee80211_hw *hw, 738 int privacy_invoked); 739 740 /* For devices that have internal sequence counters, allow 802.11 741 * code to access the current value of a counter */ 742 int (*get_sequence_counter)(struct ieee80211_hw *hw, 743 u8* addr, u8 keyidx, u8 txrx, 744 u32* iv32, u16* iv16); 745 746 /* Configuration of RTS threshold (if device needs it) */ 747 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 748 749 /* Configuration of fragmentation threshold. 750 * Assign this if the device does fragmentation by itself, 751 * if this method is assigned then the stack will not do 752 * fragmentation. */ 753 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 754 755 /* Configuration of retry limits (if device needs it) */ 756 int (*set_retry_limit)(struct ieee80211_hw *hw, 757 u32 short_retry, u32 long_retr); 758 759 /* Number of STAs in STA table notification (NULL = disabled). 760 * Must be atomic. */ 761 void (*sta_table_notification)(struct ieee80211_hw *hw, 762 int num_sta); 763 764 /* Handle ERP IE change notifications. Must be atomic. */ 765 void (*erp_ie_changed)(struct ieee80211_hw *hw, u8 changes, 766 int cts_protection, int preamble); 767 768 /* Flags for the erp_ie_changed changes parameter */ 769#define IEEE80211_ERP_CHANGE_PROTECTION (1<<0) /* protection flag changed */ 770#define IEEE80211_ERP_CHANGE_PREAMBLE (1<<1) /* barker preamble mode changed */ 771 772 /* Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 773 * bursting) for a hardware TX queue. 774 * queue = IEEE80211_TX_QUEUE_*. 775 * Must be atomic. */ 776 int (*conf_tx)(struct ieee80211_hw *hw, int queue, 777 const struct ieee80211_tx_queue_params *params); 778 779 /* Get statistics of the current TX queue status. This is used to get 780 * number of currently queued packets (queue length), maximum queue 781 * size (limit), and total number of packets sent using each TX queue 782 * (count). 783 * Currently unused. */ 784 int (*get_tx_stats)(struct ieee80211_hw *hw, 785 struct ieee80211_tx_queue_stats *stats); 786 787 /* Get the current TSF timer value from firmware/hardware. Currently, 788 * this is only used for IBSS mode debugging and, as such, is not a 789 * required function. 790 * Must be atomic. */ 791 u64 (*get_tsf)(struct ieee80211_hw *hw); 792 793 /* Reset the TSF timer and allow firmware/hardware to synchronize with 794 * other STAs in the IBSS. This is only used in IBSS mode. This 795 * function is optional if the firmware/hardware takes full care of 796 * TSF synchronization. */ 797 void (*reset_tsf)(struct ieee80211_hw *hw); 798 799 /* Setup beacon data for IBSS beacons. Unlike access point (Master), 800 * IBSS uses a fixed beacon frame which is configured using this 801 * function. This handler is required only for IBSS mode. */ 802 int (*beacon_update)(struct ieee80211_hw *hw, 803 struct sk_buff *skb, 804 struct ieee80211_tx_control *control); 805 806 /* Determine whether the last IBSS beacon was sent by us. This is 807 * needed only for IBSS mode and the result of this function is used to 808 * determine whether to reply to Probe Requests. */ 809 int (*tx_last_beacon)(struct ieee80211_hw *hw); 810}; 811 812/* Allocate a new hardware device. This must be called once for each 813 * hardware device. The returned pointer must be used to refer to this 814 * device when calling other functions. 802.11 code allocates a private data 815 * area for the low-level driver. The size of this area is given as 816 * priv_data_len. 817 */ 818struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 819 const struct ieee80211_ops *ops); 820 821/* Register hardware device to the IEEE 802.11 code and kernel. Low-level 822 * drivers must call this function before using any other IEEE 802.11 823 * function except ieee80211_register_hwmode. */ 824int ieee80211_register_hw(struct ieee80211_hw *hw); 825 826/* driver can use this and ieee80211_get_rx_led_name to get the 827 * name of the registered LEDs after ieee80211_register_hw 828 * was called. 829 * This is useful to set the default trigger on the LED class 830 * device that your driver should export for each LED the device 831 * has, that way the default behaviour will be as expected but 832 * the user can still change it/turn off the LED etc. 833 */ 834#ifdef CONFIG_MAC80211_LEDS 835extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 836extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 837#endif 838static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 839{ 840#ifdef CONFIG_MAC80211_LEDS 841 return __ieee80211_get_tx_led_name(hw); 842#else 843 return NULL; 844#endif 845} 846 847static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 848{ 849#ifdef CONFIG_MAC80211_LEDS 850 return __ieee80211_get_rx_led_name(hw); 851#else 852 return NULL; 853#endif 854} 855 856/* Register a new hardware PHYMODE capability to the stack. */ 857int ieee80211_register_hwmode(struct ieee80211_hw *hw, 858 struct ieee80211_hw_mode *mode); 859 860/* Unregister a hardware device. This function instructs 802.11 code to free 861 * allocated resources and unregister netdevices from the kernel. */ 862void ieee80211_unregister_hw(struct ieee80211_hw *hw); 863 864/* Free everything that was allocated including private data of a driver. */ 865void ieee80211_free_hw(struct ieee80211_hw *hw); 866 867/* Receive frame callback function. The low-level driver uses this function to 868 * send received frames to the IEEE 802.11 code. Receive buffer (skb) must 869 * start with IEEE 802.11 header. */ 870void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, 871 struct ieee80211_rx_status *status); 872void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, 873 struct sk_buff *skb, 874 struct ieee80211_rx_status *status); 875 876/* Transmit status callback function. The low-level driver must call this 877 * function to report transmit status for all the TX frames that had 878 * req_tx_status set in the transmit control fields. In addition, this should 879 * be called at least for all unicast frames to provide information for TX rate 880 * control algorithm. In order to maintain all statistics, this function is 881 * recommended to be called after each frame, including multicast/broadcast, is 882 * sent. */ 883void ieee80211_tx_status(struct ieee80211_hw *hw, 884 struct sk_buff *skb, 885 struct ieee80211_tx_status *status); 886void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 887 struct sk_buff *skb, 888 struct ieee80211_tx_status *status); 889 890/** 891 * ieee80211_beacon_get - beacon generation function 892 * @hw: pointer obtained from ieee80211_alloc_hw(). 893 * @if_id: interface ID from &struct ieee80211_if_init_conf. 894 * @control: will be filled with information needed to send this beacon. 895 * 896 * If the beacon frames are generated by the host system (i.e., not in 897 * hardware/firmware), the low-level driver uses this function to receive 898 * the next beacon frame from the 802.11 code. The low-level is responsible 899 * for calling this function before beacon data is needed (e.g., based on 900 * hardware interrupt). Returned skb is used only once and low-level driver 901 * is responsible of freeing it. 902 */ 903struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 904 int if_id, 905 struct ieee80211_tx_control *control); 906 907/** 908 * ieee80211_rts_get - RTS frame generation function 909 * @hw: pointer obtained from ieee80211_alloc_hw(). 910 * @if_id: interface ID from &struct ieee80211_if_init_conf. 911 * @frame: pointer to the frame that is going to be protected by the RTS. 912 * @frame_len: the frame length (in octets). 913 * @frame_txctl: &struct ieee80211_tx_control of the frame. 914 * @rts: The buffer where to store the RTS frame. 915 * 916 * If the RTS frames are generated by the host system (i.e., not in 917 * hardware/firmware), the low-level driver uses this function to receive 918 * the next RTS frame from the 802.11 code. The low-level is responsible 919 * for calling this function before and RTS frame is needed. 920 */ 921void ieee80211_rts_get(struct ieee80211_hw *hw, int if_id, 922 const void *frame, size_t frame_len, 923 const struct ieee80211_tx_control *frame_txctl, 924 struct ieee80211_rts *rts); 925 926/** 927 * ieee80211_rts_duration - Get the duration field for an RTS frame 928 * @hw: pointer obtained from ieee80211_alloc_hw(). 929 * @if_id: interface ID from &struct ieee80211_if_init_conf. 930 * @frame_len: the length of the frame that is going to be protected by the RTS. 931 * @frame_txctl: &struct ieee80211_tx_control of the frame. 932 * 933 * If the RTS is generated in firmware, but the host system must provide 934 * the duration field, the low-level driver uses this function to receive 935 * the duration field value in little-endian byteorder. 936 */ 937__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, int if_id, 938 size_t frame_len, 939 const struct ieee80211_tx_control *frame_txctl); 940 941/** 942 * ieee80211_ctstoself_get - CTS-to-self frame generation function 943 * @hw: pointer obtained from ieee80211_alloc_hw(). 944 * @if_id: interface ID from &struct ieee80211_if_init_conf. 945 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 946 * @frame_len: the frame length (in octets). 947 * @frame_txctl: &struct ieee80211_tx_control of the frame. 948 * @cts: The buffer where to store the CTS-to-self frame. 949 * 950 * If the CTS-to-self frames are generated by the host system (i.e., not in 951 * hardware/firmware), the low-level driver uses this function to receive 952 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 953 * for calling this function before and CTS-to-self frame is needed. 954 */ 955void ieee80211_ctstoself_get(struct ieee80211_hw *hw, int if_id, 956 const void *frame, size_t frame_len, 957 const struct ieee80211_tx_control *frame_txctl, 958 struct ieee80211_cts *cts); 959 960/** 961 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 962 * @hw: pointer obtained from ieee80211_alloc_hw(). 963 * @if_id: interface ID from &struct ieee80211_if_init_conf. 964 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 965 * @frame_txctl: &struct ieee80211_tx_control of the frame. 966 * 967 * If the CTS-to-self is generated in firmware, but the host system must provide 968 * the duration field, the low-level driver uses this function to receive 969 * the duration field value in little-endian byteorder. 970 */ 971__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, int if_id, 972 size_t frame_len, 973 const struct ieee80211_tx_control *frame_txctl); 974 975/** 976 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 977 * @hw: pointer obtained from ieee80211_alloc_hw(). 978 * @if_id: interface ID from &struct ieee80211_if_init_conf. 979 * @frame_len: the length of the frame. 980 * @rate: the rate (in 100kbps) at which the frame is going to be transmitted. 981 * 982 * Calculate the duration field of some generic frame, given its 983 * length and transmission rate (in 100kbps). 984 */ 985__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, int if_id, 986 size_t frame_len, 987 int rate); 988 989/** 990 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 991 * @hw: pointer as obtained from ieee80211_alloc_hw(). 992 * @if_id: interface ID from &struct ieee80211_if_init_conf. 993 * @control: will be filled with information needed to send returned frame. 994 * 995 * Function for accessing buffered broadcast and multicast frames. If 996 * hardware/firmware does not implement buffering of broadcast/multicast 997 * frames when power saving is used, 802.11 code buffers them in the host 998 * memory. The low-level driver uses this function to fetch next buffered 999 * frame. In most cases, this is used when generating beacon frame. This 1000 * function returns a pointer to the next buffered skb or NULL if no more 1001 * buffered frames are available. 1002 * 1003 * Note: buffered frames are returned only after DTIM beacon frame was 1004 * generated with ieee80211_beacon_get() and the low-level driver must thus 1005 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 1006 * NULL if the previous generated beacon was not DTIM, so the low-level driver 1007 * does not need to check for DTIM beacons separately and should be able to 1008 * use common code for all beacons. 1009 */ 1010struct sk_buff * 1011ieee80211_get_buffered_bc(struct ieee80211_hw *hw, int if_id, 1012 struct ieee80211_tx_control *control); 1013 1014/* Given an sk_buff with a raw 802.11 header at the data pointer this function 1015 * returns the 802.11 header length in bytes (not including encryption 1016 * headers). If the data in the sk_buff is too short to contain a valid 802.11 1017 * header the function returns 0. 1018 */ 1019int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb); 1020 1021/* Like ieee80211_get_hdrlen_from_skb() but takes a FC in CPU order. */ 1022int ieee80211_get_hdrlen(u16 fc); 1023 1024/** 1025 * ieee80211_wake_queue - wake specific queue 1026 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1027 * @queue: queue number (counted from zero). 1028 * 1029 * Drivers should use this function instead of netif_wake_queue. 1030 */ 1031void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 1032 1033/** 1034 * ieee80211_stop_queue - stop specific queue 1035 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1036 * @queue: queue number (counted from zero). 1037 * 1038 * Drivers should use this function instead of netif_stop_queue. 1039 */ 1040void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 1041 1042/** 1043 * ieee80211_start_queues - start all queues 1044 * @hw: pointer to as obtained from ieee80211_alloc_hw(). 1045 * 1046 * Drivers should use this function instead of netif_start_queue. 1047 */ 1048void ieee80211_start_queues(struct ieee80211_hw *hw); 1049 1050/** 1051 * ieee80211_stop_queues - stop all queues 1052 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1053 * 1054 * Drivers should use this function instead of netif_stop_queue. 1055 */ 1056void ieee80211_stop_queues(struct ieee80211_hw *hw); 1057 1058/** 1059 * ieee80211_wake_queues - wake all queues 1060 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1061 * 1062 * Drivers should use this function instead of netif_wake_queue. 1063 */ 1064void ieee80211_wake_queues(struct ieee80211_hw *hw); 1065 1066/** 1067 * ieee80211_get_mc_list_item - iteration over items in multicast list 1068 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1069 * @prev: value returned by previous call to ieee80211_get_mc_list_item() or 1070 * NULL to start a new iteration. 1071 * @ptr: pointer to buffer of void * type for internal usage of 1072 * ieee80211_get_mc_list_item(). 1073 * 1074 * Iterates over items in multicast list of given device. To get the first 1075 * item, pass NULL in @prev and in *@ptr. In subsequent calls, pass the 1076 * value returned by previous call in @prev. Don't alter *@ptr during 1077 * iteration. When there are no more items, NULL is returned. 1078 */ 1079struct dev_mc_list * 1080ieee80211_get_mc_list_item(struct ieee80211_hw *hw, 1081 struct dev_mc_list *prev, 1082 void **ptr); 1083 1084/* called by driver to notify scan status completed */ 1085void ieee80211_scan_completed(struct ieee80211_hw *hw); 1086 1087/* return a pointer to the source address (SA) */ 1088static inline u8 *ieee80211_get_SA(struct ieee80211_hdr *hdr) 1089{ 1090 u8 *raw = (u8 *) hdr; 1091 u8 tofrom = (*(raw+1)) & 3; /* get the TODS and FROMDS bits */ 1092 1093 switch (tofrom) { 1094 case 2: 1095 return hdr->addr3; 1096 case 3: 1097 return hdr->addr4; 1098 } 1099 return hdr->addr2; 1100} 1101 1102/* return a pointer to the destination address (DA) */ 1103static inline u8 *ieee80211_get_DA(struct ieee80211_hdr *hdr) 1104{ 1105 u8 *raw = (u8 *) hdr; 1106 u8 to_ds = (*(raw+1)) & 1; /* get the TODS bit */ 1107 1108 if (to_ds) 1109 return hdr->addr3; 1110 return hdr->addr1; 1111} 1112 1113static inline int ieee80211_get_morefrag(struct ieee80211_hdr *hdr) 1114{ 1115 return (le16_to_cpu(hdr->frame_control) & 1116 IEEE80211_FCTL_MOREFRAGS) != 0; 1117} 1118 1119#define MAC_FMT "%02x:%02x:%02x:%02x:%02x:%02x" 1120#define MAC_ARG(x) ((u8*)(x))[0], ((u8*)(x))[1], ((u8*)(x))[2], \ 1121 ((u8*)(x))[3], ((u8*)(x))[4], ((u8*)(x))[5] 1122 1123#endif /* MAC80211_H */ 1124