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f0706e82 JB |
1 | /* |
2 | * Low-level hardware driver -- IEEE 802.11 driver (80211.o) interface | |
3 | * Copyright 2002-2005, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
11 | #ifndef MAC80211_H | |
12 | #define MAC80211_H | |
13 | ||
14 | #include <linux/kernel.h> | |
15 | #include <linux/if_ether.h> | |
16 | #include <linux/skbuff.h> | |
17 | #include <linux/wireless.h> | |
18 | #include <linux/device.h> | |
19 | #include <linux/ieee80211.h> | |
20 | #include <net/wireless.h> | |
21 | #include <net/cfg80211.h> | |
22 | ||
23 | /* Note! Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be | |
24 | * called in hardware interrupt context. The low-level driver must not call any | |
25 | * other functions in hardware interrupt context. If there is a need for such | |
26 | * call, the low-level driver should first ACK the interrupt and perform the | |
27 | * IEEE 802.11 code call after this, e.g., from a scheduled tasklet (in | |
28 | * software interrupt context). | |
29 | */ | |
30 | ||
31 | /* | |
32 | * Frame format used when passing frame between low-level hardware drivers | |
33 | * and IEEE 802.11 driver the same as used in the wireless media, i.e., | |
34 | * buffers start with IEEE 802.11 header and include the same octets that | |
35 | * are sent over air. | |
36 | * | |
37 | * If hardware uses IEEE 802.3 headers (and perform 802.3 <-> 802.11 | |
38 | * conversion in firmware), upper layer 802.11 code needs to be changed to | |
39 | * support this. | |
40 | * | |
41 | * If the receive frame format is not the same as the real frame sent | |
42 | * on the wireless media (e.g., due to padding etc.), upper layer 802.11 code | |
43 | * could be updated to provide support for such format assuming this would | |
44 | * optimize the performance, e.g., by removing need to re-allocation and | |
45 | * copying of the data. | |
46 | */ | |
47 | ||
48 | #define IEEE80211_CHAN_W_SCAN 0x00000001 | |
49 | #define IEEE80211_CHAN_W_ACTIVE_SCAN 0x00000002 | |
50 | #define IEEE80211_CHAN_W_IBSS 0x00000004 | |
51 | ||
52 | /* Channel information structure. Low-level driver is expected to fill in chan, | |
53 | * freq, and val fields. Other fields will be filled in by 80211.o based on | |
54 | * hostapd information and low-level driver does not need to use them. The | |
55 | * limits for each channel will be provided in 'struct ieee80211_conf' when | |
56 | * configuring the low-level driver with hw->config callback. If a device has | |
57 | * a default regulatory domain, IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED | |
58 | * can be set to let the driver configure all fields */ | |
59 | struct ieee80211_channel { | |
60 | short chan; /* channel number (IEEE 802.11) */ | |
61 | short freq; /* frequency in MHz */ | |
62 | int val; /* hw specific value for the channel */ | |
63 | int flag; /* flag for hostapd use (IEEE80211_CHAN_*) */ | |
64 | unsigned char power_level; | |
65 | unsigned char antenna_max; | |
66 | }; | |
67 | ||
68 | #define IEEE80211_RATE_ERP 0x00000001 | |
69 | #define IEEE80211_RATE_BASIC 0x00000002 | |
70 | #define IEEE80211_RATE_PREAMBLE2 0x00000004 | |
71 | #define IEEE80211_RATE_SUPPORTED 0x00000010 | |
72 | #define IEEE80211_RATE_OFDM 0x00000020 | |
73 | #define IEEE80211_RATE_CCK 0x00000040 | |
74 | #define IEEE80211_RATE_TURBO 0x00000080 | |
75 | #define IEEE80211_RATE_MANDATORY 0x00000100 | |
76 | ||
77 | #define IEEE80211_RATE_CCK_2 (IEEE80211_RATE_CCK | IEEE80211_RATE_PREAMBLE2) | |
78 | #define IEEE80211_RATE_MODULATION(f) \ | |
79 | (f & (IEEE80211_RATE_CCK | IEEE80211_RATE_OFDM)) | |
80 | ||
81 | /* Low-level driver should set PREAMBLE2, OFDM, CCK, and TURBO flags. | |
82 | * BASIC, SUPPORTED, ERP, and MANDATORY flags are set in 80211.o based on the | |
83 | * configuration. */ | |
84 | struct ieee80211_rate { | |
85 | int rate; /* rate in 100 kbps */ | |
86 | int val; /* hw specific value for the rate */ | |
87 | int flags; /* IEEE80211_RATE_ flags */ | |
88 | int val2; /* hw specific value for the rate when using short preamble | |
89 | * (only when IEEE80211_RATE_PREAMBLE2 flag is set, i.e., for | |
90 | * 2, 5.5, and 11 Mbps) */ | |
91 | signed char min_rssi_ack; | |
92 | unsigned char min_rssi_ack_delta; | |
93 | ||
94 | /* following fields are set by 80211.o and need not be filled by the | |
95 | * low-level driver */ | |
96 | int rate_inv; /* inverse of the rate (LCM(all rates) / rate) for | |
97 | * optimizing channel utilization estimates */ | |
98 | }; | |
99 | ||
100 | /* 802.11g is backwards-compatible with 802.11b, so a wlan card can | |
101 | * actually be both in 11b and 11g modes at the same time. */ | |
102 | enum { | |
103 | MODE_IEEE80211A, /* IEEE 802.11a */ | |
104 | MODE_IEEE80211B, /* IEEE 802.11b only */ | |
105 | MODE_ATHEROS_TURBO, /* Atheros Turbo mode (2x.11a at 5 GHz) */ | |
106 | MODE_IEEE80211G, /* IEEE 802.11g (and 802.11b compatibility) */ | |
107 | MODE_ATHEROS_TURBOG, /* Atheros Turbo mode (2x.11g at 2.4 GHz) */ | |
108 | ||
109 | /* keep last */ | |
110 | NUM_IEEE80211_MODES | |
111 | }; | |
112 | ||
113 | struct ieee80211_hw_mode { | |
114 | int mode; /* MODE_IEEE80211... */ | |
115 | int num_channels; /* Number of channels (below) */ | |
116 | struct ieee80211_channel *channels; /* Array of supported channels */ | |
117 | int num_rates; /* Number of rates (below) */ | |
118 | struct ieee80211_rate *rates; /* Array of supported rates */ | |
119 | ||
120 | struct list_head list; /* Internal, don't touch */ | |
121 | }; | |
122 | ||
123 | struct ieee80211_tx_queue_params { | |
124 | int aifs; /* 0 .. 255; -1 = use default */ | |
125 | int cw_min; /* 2^n-1: 1, 3, 7, .. , 1023; 0 = use default */ | |
126 | int cw_max; /* 2^n-1: 1, 3, 7, .. , 1023; 0 = use default */ | |
127 | int burst_time; /* maximum burst time in 0.1 ms (i.e., 10 = 1 ms); | |
128 | * 0 = disabled */ | |
129 | }; | |
130 | ||
131 | struct ieee80211_tx_queue_stats_data { | |
132 | unsigned int len; /* num packets in queue */ | |
133 | unsigned int limit; /* queue len (soft) limit */ | |
134 | unsigned int count; /* total num frames sent */ | |
135 | }; | |
136 | ||
137 | enum { | |
138 | IEEE80211_TX_QUEUE_DATA0, | |
139 | IEEE80211_TX_QUEUE_DATA1, | |
140 | IEEE80211_TX_QUEUE_DATA2, | |
141 | IEEE80211_TX_QUEUE_DATA3, | |
142 | IEEE80211_TX_QUEUE_DATA4, | |
143 | IEEE80211_TX_QUEUE_SVP, | |
144 | ||
145 | NUM_TX_DATA_QUEUES, | |
146 | ||
147 | /* due to stupidity in the sub-ioctl userspace interface, the items in | |
148 | * this struct need to have fixed values. As soon as it is removed, we can | |
149 | * fix these entries. */ | |
150 | IEEE80211_TX_QUEUE_AFTER_BEACON = 6, | |
151 | IEEE80211_TX_QUEUE_BEACON = 7 | |
152 | }; | |
153 | ||
154 | struct ieee80211_tx_queue_stats { | |
155 | struct ieee80211_tx_queue_stats_data data[NUM_TX_DATA_QUEUES]; | |
156 | }; | |
157 | ||
158 | struct ieee80211_low_level_stats { | |
159 | unsigned int dot11ACKFailureCount; | |
160 | unsigned int dot11RTSFailureCount; | |
161 | unsigned int dot11FCSErrorCount; | |
162 | unsigned int dot11RTSSuccessCount; | |
163 | }; | |
164 | ||
165 | /* Transmit control fields. This data structure is passed to low-level driver | |
166 | * with each TX frame. The low-level driver is responsible for configuring | |
167 | * the hardware to use given values (depending on what is supported). */ | |
168 | #define HW_KEY_IDX_INVALID -1 | |
169 | ||
170 | struct ieee80211_tx_control { | |
171 | int tx_rate; /* Transmit rate, given as the hw specific value for the | |
172 | * rate (from struct ieee80211_rate) */ | |
173 | int rts_cts_rate; /* Transmit rate for RTS/CTS frame, given as the hw | |
174 | * specific value for the rate (from | |
175 | * struct ieee80211_rate) */ | |
176 | ||
177 | #define IEEE80211_TXCTL_REQ_TX_STATUS (1<<0)/* request TX status callback for | |
178 | * this frame */ | |
179 | #define IEEE80211_TXCTL_DO_NOT_ENCRYPT (1<<1) /* send this frame without | |
180 | * encryption; e.g., for EAPOL | |
181 | * frames */ | |
182 | #define IEEE80211_TXCTL_USE_RTS_CTS (1<<2) /* use RTS-CTS before sending | |
183 | * frame */ | |
184 | #define IEEE80211_TXCTL_USE_CTS_PROTECT (1<<3) /* use CTS protection for the | |
185 | * frame (e.g., for combined | |
186 | * 802.11g / 802.11b networks) */ | |
187 | #define IEEE80211_TXCTL_NO_ACK (1<<4) /* tell the low level not to | |
188 | * wait for an ack */ | |
189 | #define IEEE80211_TXCTL_RATE_CTRL_PROBE (1<<5) | |
190 | #define IEEE80211_TXCTL_CLEAR_DST_MASK (1<<6) | |
191 | #define IEEE80211_TXCTL_REQUEUE (1<<7) | |
192 | #define IEEE80211_TXCTL_FIRST_FRAGMENT (1<<8) /* this is a first fragment of | |
193 | * the frame */ | |
194 | #define IEEE80211_TXCTL_TKIP_NEW_PHASE1_KEY (1<<9) | |
195 | u32 flags; /* tx control flags defined | |
196 | * above */ | |
197 | u8 retry_limit; /* 1 = only first attempt, 2 = one retry, .. */ | |
198 | u8 power_level; /* per-packet transmit power level, in dBm */ | |
199 | u8 antenna_sel_tx; /* 0 = default/diversity, 1 = Ant0, 2 = Ant1 */ | |
200 | s8 key_idx; /* -1 = do not encrypt, >= 0 keyidx from | |
201 | * hw->set_key() */ | |
202 | u8 icv_len; /* length of the ICV/MIC field in octets */ | |
203 | u8 iv_len; /* length of the IV field in octets */ | |
204 | u8 tkip_key[16]; /* generated phase2/phase1 key for hw TKIP */ | |
205 | u8 queue; /* hardware queue to use for this frame; | |
206 | * 0 = highest, hw->queues-1 = lowest */ | |
207 | u8 sw_retry_attempt; /* number of times hw has tried to | |
208 | * transmit frame (not incl. hw retries) */ | |
209 | ||
210 | struct ieee80211_rate *rate; /* internal 80211.o rate */ | |
211 | struct ieee80211_rate *rts_rate; /* internal 80211.o rate | |
212 | * for RTS/CTS */ | |
213 | int alt_retry_rate; /* retry rate for the last retries, given as the | |
214 | * hw specific value for the rate (from | |
215 | * struct ieee80211_rate). To be used to limit | |
216 | * packet dropping when probing higher rates, if hw | |
217 | * supports multiple retry rates. -1 = not used */ | |
218 | int type; /* internal */ | |
219 | int ifindex; /* internal */ | |
220 | }; | |
221 | ||
222 | /* Receive status. The low-level driver should provide this information | |
223 | * (the subset supported by hardware) to the 802.11 code with each received | |
224 | * frame. */ | |
225 | struct ieee80211_rx_status { | |
226 | u64 mactime; | |
227 | int freq; /* receive frequency in Mhz */ | |
228 | int channel; | |
229 | int phymode; | |
230 | int ssi; | |
231 | int signal; /* used as qual in statistics reporting */ | |
232 | int noise; | |
233 | int antenna; | |
234 | int rate; | |
235 | #define RX_FLAG_MMIC_ERROR (1<<0) | |
236 | #define RX_FLAG_DECRYPTED (1<<1) | |
237 | #define RX_FLAG_RADIOTAP (1<<2) | |
238 | int flag; | |
239 | }; | |
240 | ||
241 | /* Transmit status. The low-level driver should provide this information | |
242 | * (the subset supported by hardware) to the 802.11 code for each transmit | |
243 | * frame. */ | |
244 | struct ieee80211_tx_status { | |
245 | /* copied ieee80211_tx_control structure */ | |
246 | struct ieee80211_tx_control control; | |
247 | ||
248 | #define IEEE80211_TX_STATUS_TX_FILTERED (1<<0) | |
249 | #define IEEE80211_TX_STATUS_ACK (1<<1) /* whether the TX frame was ACKed */ | |
250 | u32 flags; /* tx staus flags defined above */ | |
251 | ||
252 | int ack_signal; /* measured signal strength of the ACK frame */ | |
253 | int excessive_retries; | |
254 | int retry_count; | |
255 | ||
256 | int queue_length; /* information about TX queue */ | |
257 | int queue_number; | |
258 | }; | |
259 | ||
260 | ||
261 | /** | |
262 | * struct ieee80211_conf - configuration of the device | |
263 | * | |
264 | * This struct indicates how the driver shall configure the hardware. | |
265 | * | |
266 | * @radio_enabled: when zero, driver is required to switch off the radio. | |
267 | */ | |
268 | struct ieee80211_conf { | |
269 | int channel; /* IEEE 802.11 channel number */ | |
270 | int freq; /* MHz */ | |
271 | int channel_val; /* hw specific value for the channel */ | |
272 | ||
273 | int phymode; /* MODE_IEEE80211A, .. */ | |
274 | struct ieee80211_channel *chan; | |
275 | struct ieee80211_hw_mode *mode; | |
276 | unsigned int regulatory_domain; | |
277 | int radio_enabled; | |
278 | ||
279 | int beacon_int; | |
280 | ||
281 | #define IEEE80211_CONF_SHORT_SLOT_TIME (1<<0) /* use IEEE 802.11g Short Slot | |
282 | * Time */ | |
283 | #define IEEE80211_CONF_SSID_HIDDEN (1<<1) /* do not broadcast the ssid */ | |
284 | #define IEEE80211_CONF_RADIOTAP (1<<2) /* use radiotap if supported | |
285 | check this bit at RX time */ | |
286 | u32 flags; /* configuration flags defined above */ | |
287 | ||
288 | u8 power_level; /* transmit power limit for current | |
289 | * regulatory domain; in dBm */ | |
290 | u8 antenna_max; /* maximum antenna gain */ | |
291 | short tx_power_reduction; /* in 0.1 dBm */ | |
292 | ||
293 | /* 0 = default/diversity, 1 = Ant0, 2 = Ant1 */ | |
294 | u8 antenna_sel_tx; | |
295 | u8 antenna_sel_rx; | |
296 | ||
297 | int antenna_def; | |
298 | int antenna_mode; | |
299 | ||
300 | /* Following five fields are used for IEEE 802.11H */ | |
301 | unsigned int radar_detect; | |
302 | unsigned int spect_mgmt; | |
303 | /* All following fields are currently unused. */ | |
304 | unsigned int quiet_duration; /* duration of quiet period */ | |
305 | unsigned int quiet_offset; /* how far into the beacon is the quiet | |
306 | * period */ | |
307 | unsigned int quiet_period; | |
308 | u8 radar_firpwr_threshold; | |
309 | u8 radar_rssi_threshold; | |
310 | u8 pulse_height_threshold; | |
311 | u8 pulse_rssi_threshold; | |
312 | u8 pulse_inband_threshold; | |
313 | }; | |
314 | ||
315 | /** | |
316 | * enum ieee80211_if_types - types of 802.11 network interfaces | |
317 | * | |
318 | * @IEEE80211_IF_TYPE_AP: interface in AP mode. | |
319 | * @IEEE80211_IF_TYPE_MGMT: special interface for communication with hostap | |
320 | * daemon. Drivers should never see this type. | |
321 | * @IEEE80211_IF_TYPE_STA: interface in STA (client) mode. | |
322 | * @IEEE80211_IF_TYPE_IBSS: interface in IBSS (ad-hoc) mode. | |
323 | * @IEEE80211_IF_TYPE_MNTR: interface in monitor (rfmon) mode. | |
324 | * @IEEE80211_IF_TYPE_WDS: interface in WDS mode. | |
325 | * @IEEE80211_IF_TYPE_VLAN: not used. | |
326 | */ | |
327 | enum ieee80211_if_types { | |
328 | IEEE80211_IF_TYPE_AP = 0x00000000, | |
329 | IEEE80211_IF_TYPE_MGMT = 0x00000001, | |
330 | IEEE80211_IF_TYPE_STA = 0x00000002, | |
331 | IEEE80211_IF_TYPE_IBSS = 0x00000003, | |
332 | IEEE80211_IF_TYPE_MNTR = 0x00000004, | |
333 | IEEE80211_IF_TYPE_WDS = 0x5A580211, | |
334 | IEEE80211_IF_TYPE_VLAN = 0x00080211, | |
335 | }; | |
336 | ||
337 | /** | |
338 | * struct ieee80211_if_init_conf - initial configuration of an interface | |
339 | * | |
340 | * @if_id: internal interface ID. This number has no particular meaning to | |
341 | * drivers and the only allowed usage is to pass it to | |
342 | * ieee80211_beacon_get() and ieee80211_get_buffered_bc() functions. | |
343 | * This field is not valid for monitor interfaces | |
344 | * (interfaces of %IEEE80211_IF_TYPE_MNTR type). | |
345 | * @type: one of &enum ieee80211_if_types constants. Determines the type of | |
346 | * added/removed interface. | |
347 | * @mac_addr: pointer to MAC address of the interface. This pointer is valid | |
348 | * until the interface is removed (i.e. it cannot be used after | |
349 | * remove_interface() callback was called for this interface). | |
350 | * | |
351 | * This structure is used in add_interface() and remove_interface() | |
352 | * callbacks of &struct ieee80211_hw. | |
353 | */ | |
354 | struct ieee80211_if_init_conf { | |
355 | int if_id; | |
356 | int type; | |
357 | void *mac_addr; | |
358 | }; | |
359 | ||
360 | /** | |
361 | * struct ieee80211_if_conf - configuration of an interface | |
362 | * | |
363 | * @type: type of the interface. This is always the same as was specified in | |
364 | * &struct ieee80211_if_init_conf. The type of an interface never changes | |
365 | * during the life of the interface; this field is present only for | |
366 | * convenience. | |
367 | * @bssid: BSSID of the network we are associated to/creating. | |
368 | * @ssid: used (together with @ssid_len) by drivers for hardware that | |
369 | * generate beacons independently. The pointer is valid only during the | |
370 | * config_interface() call, so copy the value somewhere if you need | |
371 | * it. | |
372 | * @ssid_len: length of the @ssid field. | |
373 | * @generic_elem: used (together with @generic_elem_len) by drivers for | |
374 | * hardware that generate beacons independently. The pointer is valid | |
375 | * only during the config_interface() call, so copy the value somewhere | |
376 | * if you need it. | |
377 | * @generic_elem_len: length of the generic element. | |
378 | * @beacon: beacon template. Valid only if @host_gen_beacon_template in | |
379 | * &struct ieee80211_hw is set. The driver is responsible of freeing | |
380 | * the sk_buff. | |
381 | * @beacon_control: tx_control for the beacon template, this field is only | |
382 | * valid when the @beacon field was set. | |
383 | * | |
384 | * This structure is passed to the config_interface() callback of | |
385 | * &struct ieee80211_hw. | |
386 | */ | |
387 | struct ieee80211_if_conf { | |
388 | int type; | |
389 | u8 *bssid; | |
390 | u8 *ssid; | |
391 | size_t ssid_len; | |
392 | u8 *generic_elem; | |
393 | size_t generic_elem_len; | |
394 | struct sk_buff *beacon; | |
395 | struct ieee80211_tx_control *beacon_control; | |
396 | }; | |
397 | ||
398 | typedef enum { ALG_NONE, ALG_WEP, ALG_TKIP, ALG_CCMP, ALG_NULL } | |
399 | ieee80211_key_alg; | |
400 | ||
401 | ||
402 | struct ieee80211_key_conf { | |
403 | ||
404 | int hw_key_idx; /* filled + used by low-level driver */ | |
405 | ieee80211_key_alg alg; | |
406 | int keylen; | |
407 | ||
408 | #define IEEE80211_KEY_FORCE_SW_ENCRYPT (1<<0) /* to be cleared by low-level | |
409 | driver */ | |
410 | #define IEEE80211_KEY_DEFAULT_TX_KEY (1<<1) /* This key is the new default TX | |
411 | key (used only for broadcast | |
412 | keys). */ | |
413 | #define IEEE80211_KEY_DEFAULT_WEP_ONLY (1<<2) /* static WEP is the only | |
414 | configured security policy; | |
415 | this allows some low-level | |
416 | drivers to determine when | |
417 | hwaccel can be used */ | |
418 | u32 flags; /* key configuration flags defined above */ | |
419 | ||
420 | s8 keyidx; /* WEP key index */ | |
421 | u8 key[0]; | |
422 | }; | |
423 | ||
424 | #define IEEE80211_SEQ_COUNTER_RX 0 | |
425 | #define IEEE80211_SEQ_COUNTER_TX 1 | |
426 | ||
427 | typedef enum { | |
428 | SET_KEY, DISABLE_KEY, REMOVE_ALL_KEYS, | |
429 | } set_key_cmd; | |
430 | ||
431 | /* This is driver-visible part of the per-hw state the stack keeps. */ | |
432 | struct ieee80211_hw { | |
433 | /* points to the cfg80211 wiphy for this piece. Note | |
434 | * that you must fill in the perm_addr and dev fields | |
435 | * of this structure, use the macros provided below. */ | |
436 | struct wiphy *wiphy; | |
437 | ||
438 | /* assigned by mac80211, don't write */ | |
439 | struct ieee80211_conf conf; | |
440 | ||
441 | /* Single thread workqueue available for driver use | |
442 | * Allocated by mac80211 on registration */ | |
443 | struct workqueue_struct *workqueue; | |
444 | ||
445 | /* Pointer to the private area that was | |
446 | * allocated with this struct for you. */ | |
447 | void *priv; | |
448 | ||
449 | /* The rest is information about your hardware */ | |
450 | ||
451 | /* TODO: frame_type 802.11/802.3, sw_encryption requirements */ | |
452 | ||
453 | /* Some wireless LAN chipsets generate beacons in the hardware/firmware | |
454 | * and others rely on host generated beacons. This option is used to | |
455 | * configure the upper layer IEEE 802.11 module to generate beacons. | |
456 | * The low-level driver can use ieee80211_beacon_get() to fetch the | |
457 | * next beacon frame. */ | |
458 | #define IEEE80211_HW_HOST_GEN_BEACON (1<<0) | |
459 | ||
460 | /* The device needs to be supplied with a beacon template only. */ | |
461 | #define IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE (1<<1) | |
462 | ||
463 | /* Some devices handle decryption internally and do not | |
464 | * indicate whether the frame was encrypted (unencrypted frames | |
465 | * will be dropped by the hardware, unless specifically allowed | |
466 | * through) */ | |
467 | #define IEEE80211_HW_DEVICE_HIDES_WEP (1<<2) | |
468 | ||
469 | /* Whether RX frames passed to ieee80211_rx() include FCS in the end */ | |
470 | #define IEEE80211_HW_RX_INCLUDES_FCS (1<<3) | |
471 | ||
472 | /* Some wireless LAN chipsets buffer broadcast/multicast frames for | |
473 | * power saving stations in the hardware/firmware and others rely on | |
474 | * the host system for such buffering. This option is used to | |
475 | * configure the IEEE 802.11 upper layer to buffer broadcast/multicast | |
476 | * frames when there are power saving stations so that low-level driver | |
477 | * can fetch them with ieee80211_get_buffered_bc(). */ | |
478 | #define IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING (1<<4) | |
479 | ||
480 | #define IEEE80211_HW_WEP_INCLUDE_IV (1<<5) | |
481 | ||
482 | /* will data nullfunc frames get proper TX status callback */ | |
483 | #define IEEE80211_HW_DATA_NULLFUNC_ACK (1<<6) | |
484 | ||
485 | /* Force software encryption for TKIP packets if WMM is enabled. */ | |
486 | #define IEEE80211_HW_NO_TKIP_WMM_HWACCEL (1<<7) | |
487 | ||
488 | /* Some devices handle Michael MIC internally and do not include MIC in | |
489 | * the received packets passed up. device_strips_mic must be set | |
490 | * for such devices. The 'encryption' frame control bit is expected to | |
491 | * be still set in the IEEE 802.11 header with this option unlike with | |
492 | * the device_hides_wep configuration option. | |
493 | */ | |
494 | #define IEEE80211_HW_DEVICE_STRIPS_MIC (1<<8) | |
495 | ||
496 | /* Device is capable of performing full monitor mode even during | |
497 | * normal operation. */ | |
498 | #define IEEE80211_HW_MONITOR_DURING_OPER (1<<9) | |
499 | ||
500 | /* Device does not need BSSID filter set to broadcast in order to | |
501 | * receive all probe responses while scanning */ | |
502 | #define IEEE80211_HW_NO_PROBE_FILTERING (1<<10) | |
503 | ||
504 | /* Channels are already configured to the default regulatory domain | |
505 | * specified in the device's EEPROM */ | |
506 | #define IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED (1<<11) | |
507 | ||
508 | /* calculate Michael MIC for an MSDU when doing hwcrypto */ | |
509 | #define IEEE80211_HW_TKIP_INCLUDE_MMIC (1<<12) | |
510 | /* Do TKIP phase1 key mixing in stack to support cards only do | |
511 | * phase2 key mixing when doing hwcrypto */ | |
512 | #define IEEE80211_HW_TKIP_REQ_PHASE1_KEY (1<<13) | |
513 | /* Do TKIP phase1 and phase2 key mixing in stack and send the generated | |
514 | * per-packet RC4 key with each TX frame when doing hwcrypto */ | |
515 | #define IEEE80211_HW_TKIP_REQ_PHASE2_KEY (1<<14) | |
516 | ||
517 | u32 flags; /* hardware flags defined above */ | |
518 | ||
519 | /* Set to the size of a needed device specific skb headroom for TX skbs. */ | |
520 | unsigned int extra_tx_headroom; | |
521 | ||
522 | /* This is the time in us to change channels | |
523 | */ | |
524 | int channel_change_time; | |
525 | /* Maximum values for various statistics. | |
526 | * Leave at 0 to indicate no support. Use negative numbers for dBm. */ | |
527 | s8 max_rssi; | |
528 | s8 max_signal; | |
529 | s8 max_noise; | |
530 | ||
531 | /* Number of available hardware TX queues for data packets. | |
532 | * WMM requires at least four queues. */ | |
533 | int queues; | |
534 | }; | |
535 | ||
536 | static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) | |
537 | { | |
538 | set_wiphy_dev(hw->wiphy, dev); | |
539 | } | |
540 | ||
541 | static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) | |
542 | { | |
543 | memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); | |
544 | } | |
545 | ||
546 | /* Configuration block used by the low-level driver to tell the 802.11 code | |
547 | * about supported hardware features and to pass function pointers to callback | |
548 | * functions. */ | |
549 | struct ieee80211_ops { | |
550 | /* Handler that 802.11 module calls for each transmitted frame. | |
551 | * skb contains the buffer starting from the IEEE 802.11 header. | |
552 | * The low-level driver should send the frame out based on | |
553 | * configuration in the TX control data. | |
554 | * Must be atomic. */ | |
555 | int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb, | |
556 | struct ieee80211_tx_control *control); | |
557 | ||
558 | /* Handler for performing hardware reset. */ | |
559 | int (*reset)(struct ieee80211_hw *hw); | |
560 | ||
561 | /* Handler that is called when any netdevice attached to the hardware | |
562 | * device is set UP for the first time. This can be used, e.g., to | |
563 | * enable interrupts and beacon sending. */ | |
564 | int (*open)(struct ieee80211_hw *hw); | |
565 | ||
566 | /* Handler that is called when the last netdevice attached to the | |
567 | * hardware device is set DOWN. This can be used, e.g., to disable | |
568 | * interrupts and beacon sending. */ | |
569 | int (*stop)(struct ieee80211_hw *hw); | |
570 | ||
571 | /* Handler for asking a driver if a new interface can be added (or, | |
572 | * more exactly, set UP). If the handler returns zero, the interface | |
573 | * is added. Driver should perform any initialization it needs prior | |
574 | * to returning zero. By returning non-zero addition of the interface | |
575 | * is inhibited. Unless monitor_during_oper is set, it is guaranteed | |
576 | * that monitor interfaces and normal interfaces are mutually | |
577 | * exclusive. The open() handler is called after add_interface() | |
578 | * if this is the first device added. At least one of the open() | |
579 | * open() and add_interface() callbacks has to be assigned. If | |
580 | * add_interface() is NULL, one STA interface is permitted only. */ | |
581 | int (*add_interface)(struct ieee80211_hw *hw, | |
582 | struct ieee80211_if_init_conf *conf); | |
583 | ||
584 | /* Notify a driver that an interface is going down. The stop() handler | |
585 | * is called prior to this if this is a last interface. */ | |
586 | void (*remove_interface)(struct ieee80211_hw *hw, | |
587 | struct ieee80211_if_init_conf *conf); | |
588 | ||
589 | /* Handler for configuration requests. IEEE 802.11 code calls this | |
590 | * function to change hardware configuration, e.g., channel. */ | |
591 | int (*config)(struct ieee80211_hw *hw, struct ieee80211_conf *conf); | |
592 | ||
593 | /* Handler for configuration requests related to interfaces (e.g. | |
594 | * BSSID). */ | |
595 | int (*config_interface)(struct ieee80211_hw *hw, | |
596 | int if_id, struct ieee80211_if_conf *conf); | |
597 | ||
598 | /* ieee80211 drivers do not have access to the &struct net_device | |
599 | * that is (are) connected with their device. Hence (and because | |
600 | * we need to combine the multicast lists and flags for multiple | |
601 | * virtual interfaces), they cannot assign set_multicast_list. | |
602 | * The parameters here replace dev->flags and dev->mc_count, | |
603 | * dev->mc_list is replaced by calling ieee80211_get_mc_list_item. | |
604 | * Must be atomic. */ | |
605 | void (*set_multicast_list)(struct ieee80211_hw *hw, | |
606 | unsigned short flags, int mc_count); | |
607 | ||
608 | /* Set TIM bit handler. If the hardware/firmware takes care of beacon | |
609 | * generation, IEEE 802.11 code uses this function to tell the | |
610 | * low-level to set (or clear if set==0) TIM bit for the given aid. If | |
611 | * host system is used to generate beacons, this handler is not used | |
612 | * and low-level driver should set it to NULL. | |
613 | * Must be atomic. */ | |
614 | int (*set_tim)(struct ieee80211_hw *hw, int aid, int set); | |
615 | ||
616 | /* Set encryption key. IEEE 802.11 module calls this function to set | |
617 | * encryption keys. addr is ff:ff:ff:ff:ff:ff for default keys and | |
618 | * station hwaddr for individual keys. aid of the station is given | |
619 | * to help low-level driver in selecting which key->hw_key_idx to use | |
620 | * for this key. TX control data will use the hw_key_idx selected by | |
621 | * the low-level driver. | |
622 | * Must be atomic. */ | |
623 | int (*set_key)(struct ieee80211_hw *hw, set_key_cmd cmd, | |
624 | u8 *addr, struct ieee80211_key_conf *key, int aid); | |
625 | ||
626 | /* Set TX key index for default/broadcast keys. This is needed in cases | |
627 | * where wlan card is doing full WEP/TKIP encapsulation (wep_include_iv | |
628 | * is not set), in other cases, this function pointer can be set to | |
629 | * NULL since the IEEE 802. 11 module takes care of selecting the key | |
630 | * index for each TX frame. */ | |
631 | int (*set_key_idx)(struct ieee80211_hw *hw, int idx); | |
632 | ||
633 | /* Enable/disable IEEE 802.1X. This item requests wlan card to pass | |
634 | * unencrypted EAPOL-Key frames even when encryption is configured. | |
635 | * If the wlan card does not require such a configuration, this | |
636 | * function pointer can be set to NULL. */ | |
637 | int (*set_ieee8021x)(struct ieee80211_hw *hw, int use_ieee8021x); | |
638 | ||
639 | /* Set port authorization state (IEEE 802.1X PAE) to be authorized | |
640 | * (authorized=1) or unauthorized (authorized=0). This function can be | |
641 | * used if the wlan hardware or low-level driver implements PAE. | |
642 | * 80211.o module will anyway filter frames based on authorization | |
643 | * state, so this function pointer can be NULL if low-level driver does | |
644 | * not require event notification about port state changes. | |
645 | * Currently unused. */ | |
646 | int (*set_port_auth)(struct ieee80211_hw *hw, u8 *addr, | |
647 | int authorized); | |
648 | ||
649 | /* Ask the hardware to service the scan request, no need to start | |
650 | * the scan state machine in stack. */ | |
651 | int (*hw_scan)(struct ieee80211_hw *hw, u8 *ssid, size_t len); | |
652 | ||
653 | /* return low-level statistics */ | |
654 | int (*get_stats)(struct ieee80211_hw *hw, | |
655 | struct ieee80211_low_level_stats *stats); | |
656 | ||
657 | /* For devices that generate their own beacons and probe response | |
658 | * or association responses this updates the state of privacy_invoked | |
659 | * returns 0 for success or an error number */ | |
660 | int (*set_privacy_invoked)(struct ieee80211_hw *hw, | |
661 | int privacy_invoked); | |
662 | ||
663 | /* For devices that have internal sequence counters, allow 802.11 | |
664 | * code to access the current value of a counter */ | |
665 | int (*get_sequence_counter)(struct ieee80211_hw *hw, | |
666 | u8* addr, u8 keyidx, u8 txrx, | |
667 | u32* iv32, u16* iv16); | |
668 | ||
669 | /* Configuration of RTS threshold (if device needs it) */ | |
670 | int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); | |
671 | ||
672 | /* Configuration of fragmentation threshold. | |
673 | * Assign this if the device does fragmentation by itself, | |
674 | * if this method is assigned then the stack will not do | |
675 | * fragmentation. */ | |
676 | int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); | |
677 | ||
678 | /* Configuration of retry limits (if device needs it) */ | |
679 | int (*set_retry_limit)(struct ieee80211_hw *hw, | |
680 | u32 short_retry, u32 long_retr); | |
681 | ||
682 | /* Number of STAs in STA table notification (NULL = disabled). | |
683 | * Must be atomic. */ | |
684 | void (*sta_table_notification)(struct ieee80211_hw *hw, | |
685 | int num_sta); | |
686 | ||
687 | /* Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), | |
688 | * bursting) for a hardware TX queue. | |
689 | * queue = IEEE80211_TX_QUEUE_*. | |
690 | * Must be atomic. */ | |
691 | int (*conf_tx)(struct ieee80211_hw *hw, int queue, | |
692 | const struct ieee80211_tx_queue_params *params); | |
693 | ||
694 | /* Get statistics of the current TX queue status. This is used to get | |
695 | * number of currently queued packets (queue length), maximum queue | |
696 | * size (limit), and total number of packets sent using each TX queue | |
697 | * (count). | |
698 | * Currently unused. */ | |
699 | int (*get_tx_stats)(struct ieee80211_hw *hw, | |
700 | struct ieee80211_tx_queue_stats *stats); | |
701 | ||
702 | /* Get the current TSF timer value from firmware/hardware. Currently, | |
703 | * this is only used for IBSS mode debugging and, as such, is not a | |
704 | * required function. | |
705 | * Must be atomic. */ | |
706 | u64 (*get_tsf)(struct ieee80211_hw *hw); | |
707 | ||
708 | /* Reset the TSF timer and allow firmware/hardware to synchronize with | |
709 | * other STAs in the IBSS. This is only used in IBSS mode. This | |
710 | * function is optional if the firmware/hardware takes full care of | |
711 | * TSF synchronization. */ | |
712 | void (*reset_tsf)(struct ieee80211_hw *hw); | |
713 | ||
714 | /* Setup beacon data for IBSS beacons. Unlike access point (Master), | |
715 | * IBSS uses a fixed beacon frame which is configured using this | |
716 | * function. This handler is required only for IBSS mode. */ | |
717 | int (*beacon_update)(struct ieee80211_hw *hw, | |
718 | struct sk_buff *skb, | |
719 | struct ieee80211_tx_control *control); | |
720 | ||
721 | /* Determine whether the last IBSS beacon was sent by us. This is | |
722 | * needed only for IBSS mode and the result of this function is used to | |
723 | * determine whether to reply to Probe Requests. */ | |
724 | int (*tx_last_beacon)(struct ieee80211_hw *hw); | |
725 | }; | |
726 | ||
727 | /* Allocate a new hardware device. This must be called once for each | |
728 | * hardware device. The returned pointer must be used to refer to this | |
729 | * device when calling other functions. 802.11 code allocates a private data | |
730 | * area for the low-level driver. The size of this area is given as | |
731 | * priv_data_len. | |
732 | */ | |
733 | struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, | |
734 | const struct ieee80211_ops *ops); | |
735 | ||
736 | /* Register hardware device to the IEEE 802.11 code and kernel. Low-level | |
737 | * drivers must call this function before using any other IEEE 802.11 | |
738 | * function except ieee80211_register_hwmode. */ | |
739 | int ieee80211_register_hw(struct ieee80211_hw *hw); | |
740 | ||
741 | /* driver can use this and ieee80211_get_rx_led_name to get the | |
742 | * name of the registered LEDs after ieee80211_register_hw | |
743 | * was called. | |
744 | * This is useful to set the default trigger on the LED class | |
745 | * device that your driver should export for each LED the device | |
746 | * has, that way the default behaviour will be as expected but | |
747 | * the user can still change it/turn off the LED etc. | |
748 | */ | |
749 | #ifdef CONFIG_MAC80211_LEDS | |
750 | extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); | |
751 | extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); | |
752 | #endif | |
753 | static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) | |
754 | { | |
755 | #ifdef CONFIG_MAC80211_LEDS | |
756 | return __ieee80211_get_tx_led_name(hw); | |
757 | #else | |
758 | return NULL; | |
759 | #endif | |
760 | } | |
761 | ||
762 | static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) | |
763 | { | |
764 | #ifdef CONFIG_MAC80211_LEDS | |
765 | return __ieee80211_get_rx_led_name(hw); | |
766 | #else | |
767 | return NULL; | |
768 | #endif | |
769 | } | |
770 | ||
771 | /* Register a new hardware PHYMODE capability to the stack. */ | |
772 | int ieee80211_register_hwmode(struct ieee80211_hw *hw, | |
773 | struct ieee80211_hw_mode *mode); | |
774 | ||
775 | /* Unregister a hardware device. This function instructs 802.11 code to free | |
776 | * allocated resources and unregister netdevices from the kernel. */ | |
777 | void ieee80211_unregister_hw(struct ieee80211_hw *hw); | |
778 | ||
779 | /* Free everything that was allocated including private data of a driver. */ | |
780 | void ieee80211_free_hw(struct ieee80211_hw *hw); | |
781 | ||
782 | /* Receive frame callback function. The low-level driver uses this function to | |
783 | * send received frames to the IEEE 802.11 code. Receive buffer (skb) must | |
784 | * start with IEEE 802.11 header. */ | |
785 | void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, | |
786 | struct ieee80211_rx_status *status); | |
787 | void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, | |
788 | struct sk_buff *skb, | |
789 | struct ieee80211_rx_status *status); | |
790 | ||
791 | /* Transmit status callback function. The low-level driver must call this | |
792 | * function to report transmit status for all the TX frames that had | |
793 | * req_tx_status set in the transmit control fields. In addition, this should | |
794 | * be called at least for all unicast frames to provide information for TX rate | |
795 | * control algorithm. In order to maintain all statistics, this function is | |
796 | * recommended to be called after each frame, including multicast/broadcast, is | |
797 | * sent. */ | |
798 | void ieee80211_tx_status(struct ieee80211_hw *hw, | |
799 | struct sk_buff *skb, | |
800 | struct ieee80211_tx_status *status); | |
801 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, | |
802 | struct sk_buff *skb, | |
803 | struct ieee80211_tx_status *status); | |
804 | ||
805 | /** | |
806 | * ieee80211_beacon_get - beacon generation function | |
807 | * @hw: pointer obtained from ieee80211_alloc_hw(). | |
808 | * @if_id: interface ID from &struct ieee80211_if_init_conf. | |
809 | * @control: will be filled with information needed to send this beacon. | |
810 | * | |
811 | * If the beacon frames are generated by the host system (i.e., not in | |
812 | * hardware/firmware), the low-level driver uses this function to receive | |
813 | * the next beacon frame from the 802.11 code. The low-level is responsible | |
814 | * for calling this function before beacon data is needed (e.g., based on | |
815 | * hardware interrupt). Returned skb is used only once and low-level driver | |
816 | * is responsible of freeing it. | |
817 | */ | |
818 | struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, | |
819 | int if_id, | |
820 | struct ieee80211_tx_control *control); | |
821 | ||
822 | /** | |
823 | * ieee80211_rts_get - RTS frame generation function | |
824 | * @hw: pointer obtained from ieee80211_alloc_hw(). | |
825 | * @frame: pointer to the frame that is going to be protected by the RTS. | |
826 | * @frame_len: the frame length (in octets). | |
827 | * @frame_txctl: &struct ieee80211_tx_control of the frame. | |
828 | * @rts: The buffer where to store the RTS frame. | |
829 | * | |
830 | * If the RTS frames are generated by the host system (i.e., not in | |
831 | * hardware/firmware), the low-level driver uses this function to receive | |
832 | * the next RTS frame from the 802.11 code. The low-level is responsible | |
833 | * for calling this function before and RTS frame is needed. | |
834 | */ | |
835 | void ieee80211_rts_get(struct ieee80211_hw *hw, | |
836 | const void *frame, size_t frame_len, | |
837 | const struct ieee80211_tx_control *frame_txctl, | |
838 | struct ieee80211_rts *rts); | |
839 | ||
840 | /** | |
841 | * ieee80211_rts_duration - Get the duration field for an RTS frame | |
842 | * @hw: pointer obtained from ieee80211_alloc_hw(). | |
843 | * @frame_len: the length of the frame that is going to be protected by the RTS. | |
844 | * @frame_txctl: &struct ieee80211_tx_control of the frame. | |
845 | * | |
846 | * If the RTS is generated in firmware, but the host system must provide | |
847 | * the duration field, the low-level driver uses this function to receive | |
848 | * the duration field value in little-endian byteorder. | |
849 | */ | |
850 | __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, | |
851 | size_t frame_len, | |
852 | const struct ieee80211_tx_control *frame_txctl); | |
853 | ||
854 | /** | |
855 | * ieee80211_ctstoself_get - CTS-to-self frame generation function | |
856 | * @hw: pointer obtained from ieee80211_alloc_hw(). | |
857 | * @frame: pointer to the frame that is going to be protected by the CTS-to-self. | |
858 | * @frame_len: the frame length (in octets). | |
859 | * @frame_txctl: &struct ieee80211_tx_control of the frame. | |
860 | * @cts: The buffer where to store the CTS-to-self frame. | |
861 | * | |
862 | * If the CTS-to-self frames are generated by the host system (i.e., not in | |
863 | * hardware/firmware), the low-level driver uses this function to receive | |
864 | * the next CTS-to-self frame from the 802.11 code. The low-level is responsible | |
865 | * for calling this function before and CTS-to-self frame is needed. | |
866 | */ | |
867 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, | |
868 | const void *frame, size_t frame_len, | |
869 | const struct ieee80211_tx_control *frame_txctl, | |
870 | struct ieee80211_cts *cts); | |
871 | ||
872 | /** | |
873 | * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame | |
874 | * @hw: pointer obtained from ieee80211_alloc_hw(). | |
875 | * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. | |
876 | * @frame_txctl: &struct ieee80211_tx_control of the frame. | |
877 | * | |
878 | * If the CTS-to-self is generated in firmware, but the host system must provide | |
879 | * the duration field, the low-level driver uses this function to receive | |
880 | * the duration field value in little-endian byteorder. | |
881 | */ | |
882 | __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, | |
883 | size_t frame_len, | |
884 | const struct ieee80211_tx_control *frame_txctl); | |
885 | ||
886 | /** | |
887 | * ieee80211_generic_frame_duration - Calculate the duration field for a frame | |
888 | * @hw: pointer obtained from ieee80211_alloc_hw(). | |
889 | * @frame_len: the length of the frame. | |
890 | * @rate: the rate (in 100kbps) at which the frame is going to be transmitted. | |
891 | * | |
892 | * Calculate the duration field of some generic frame, given its | |
893 | * length and transmission rate (in 100kbps). | |
894 | */ | |
895 | __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, | |
896 | size_t frame_len, | |
897 | int rate); | |
898 | ||
899 | /** | |
900 | * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames | |
901 | * @hw: pointer as obtained from ieee80211_alloc_hw(). | |
902 | * @if_id: interface ID from &struct ieee80211_if_init_conf. | |
903 | * @control: will be filled with information needed to send returned frame. | |
904 | * | |
905 | * Function for accessing buffered broadcast and multicast frames. If | |
906 | * hardware/firmware does not implement buffering of broadcast/multicast | |
907 | * frames when power saving is used, 802.11 code buffers them in the host | |
908 | * memory. The low-level driver uses this function to fetch next buffered | |
909 | * frame. In most cases, this is used when generating beacon frame. This | |
910 | * function returns a pointer to the next buffered skb or NULL if no more | |
911 | * buffered frames are available. | |
912 | * | |
913 | * Note: buffered frames are returned only after DTIM beacon frame was | |
914 | * generated with ieee80211_beacon_get() and the low-level driver must thus | |
915 | * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns | |
916 | * NULL if the previous generated beacon was not DTIM, so the low-level driver | |
917 | * does not need to check for DTIM beacons separately and should be able to | |
918 | * use common code for all beacons. | |
919 | */ | |
920 | struct sk_buff * | |
921 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, int if_id, | |
922 | struct ieee80211_tx_control *control); | |
923 | ||
924 | /* Low level drivers that have their own MLME and MAC indicate | |
925 | * the aid for an associating station with this call */ | |
926 | int ieee80211_set_aid_for_sta(struct ieee80211_hw *hw, | |
927 | u8 *peer_address, u16 aid); | |
928 | ||
929 | ||
930 | /* Given an sk_buff with a raw 802.11 header at the data pointer this function | |
931 | * returns the 802.11 header length in bytes (not including encryption | |
932 | * headers). If the data in the sk_buff is too short to contain a valid 802.11 | |
933 | * header the function returns 0. | |
934 | */ | |
935 | int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb); | |
936 | ||
937 | /* Like ieee80211_get_hdrlen_from_skb() but takes a FC in CPU order. */ | |
938 | int ieee80211_get_hdrlen(u16 fc); | |
939 | ||
940 | /** | |
941 | * ieee80211_wake_queue - wake specific queue | |
942 | * @hw: pointer as obtained from ieee80211_alloc_hw(). | |
943 | * @queue: queue number (counted from zero). | |
944 | * | |
945 | * Drivers should use this function instead of netif_wake_queue. | |
946 | */ | |
947 | void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); | |
948 | ||
949 | /** | |
950 | * ieee80211_stop_queue - stop specific queue | |
951 | * @hw: pointer as obtained from ieee80211_alloc_hw(). | |
952 | * @queue: queue number (counted from zero). | |
953 | * | |
954 | * Drivers should use this function instead of netif_stop_queue. | |
955 | */ | |
956 | void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); | |
957 | ||
958 | /** | |
959 | * ieee80211_start_queues - start all queues | |
960 | * @hw: pointer to as obtained from ieee80211_alloc_hw(). | |
961 | * | |
962 | * Drivers should use this function instead of netif_start_queue. | |
963 | */ | |
964 | void ieee80211_start_queues(struct ieee80211_hw *hw); | |
965 | ||
966 | /** | |
967 | * ieee80211_stop_queues - stop all queues | |
968 | * @hw: pointer as obtained from ieee80211_alloc_hw(). | |
969 | * | |
970 | * Drivers should use this function instead of netif_stop_queue. | |
971 | */ | |
972 | void ieee80211_stop_queues(struct ieee80211_hw *hw); | |
973 | ||
974 | /** | |
975 | * ieee80211_wake_queues - wake all queues | |
976 | * @hw: pointer as obtained from ieee80211_alloc_hw(). | |
977 | * | |
978 | * Drivers should use this function instead of netif_wake_queue. | |
979 | */ | |
980 | void ieee80211_wake_queues(struct ieee80211_hw *hw); | |
981 | ||
982 | /** | |
983 | * ieee80211_get_mc_list_item - iteration over items in multicast list | |
984 | * @hw: pointer as obtained from ieee80211_alloc_hw(). | |
985 | * @prev: value returned by previous call to ieee80211_get_mc_list_item() or | |
986 | * NULL to start a new iteration. | |
987 | * @ptr: pointer to buffer of void * type for internal usage of | |
988 | * ieee80211_get_mc_list_item(). | |
989 | * | |
990 | * Iterates over items in multicast list of given device. To get the first | |
991 | * item, pass NULL in @prev and in *@ptr. In subsequent calls, pass the | |
992 | * value returned by previous call in @prev. Don't alter *@ptr during | |
993 | * iteration. When there are no more items, NULL is returned. | |
994 | */ | |
995 | struct dev_mc_list * | |
996 | ieee80211_get_mc_list_item(struct ieee80211_hw *hw, | |
997 | struct dev_mc_list *prev, | |
998 | void **ptr); | |
999 | ||
1000 | /* called by driver to notify scan status completed */ | |
1001 | void ieee80211_scan_completed(struct ieee80211_hw *hw); | |
1002 | ||
1003 | /* Function to indicate Radar Detection. The low level driver must call this | |
1004 | * function to indicate the presence of radar in the current channel. | |
1005 | * Additionally the radar type also could be sent */ | |
1006 | int ieee80211_radar_status(struct ieee80211_hw *hw, int channel, | |
1007 | int radar, int radar_type); | |
1008 | ||
1009 | /* return a pointer to the source address (SA) */ | |
1010 | static inline u8 *ieee80211_get_SA(struct ieee80211_hdr *hdr) | |
1011 | { | |
1012 | u8 *raw = (u8 *) hdr; | |
1013 | u8 tofrom = (*(raw+1)) & 3; /* get the TODS and FROMDS bits */ | |
1014 | ||
1015 | switch (tofrom) { | |
1016 | case 2: | |
1017 | return hdr->addr3; | |
1018 | case 3: | |
1019 | return hdr->addr4; | |
1020 | } | |
1021 | return hdr->addr2; | |
1022 | } | |
1023 | ||
1024 | /* return a pointer to the destination address (DA) */ | |
1025 | static inline u8 *ieee80211_get_DA(struct ieee80211_hdr *hdr) | |
1026 | { | |
1027 | u8 *raw = (u8 *) hdr; | |
1028 | u8 to_ds = (*(raw+1)) & 1; /* get the TODS bit */ | |
1029 | ||
1030 | if (to_ds) | |
1031 | return hdr->addr3; | |
1032 | return hdr->addr1; | |
1033 | } | |
1034 | ||
1035 | static inline int ieee80211_get_morefrag(struct ieee80211_hdr *hdr) | |
1036 | { | |
1037 | return (le16_to_cpu(hdr->frame_control) & | |
1038 | IEEE80211_FCTL_MOREFRAGS) != 0; | |
1039 | } | |
1040 | ||
1041 | #define MAC_FMT "%02x:%02x:%02x:%02x:%02x:%02x" | |
1042 | #define MAC_ARG(x) ((u8*)(x))[0], ((u8*)(x))[1], ((u8*)(x))[2], \ | |
1043 | ((u8*)(x))[3], ((u8*)(x))[4], ((u8*)(x))[5] | |
1044 | ||
1045 | #endif /* MAC80211_H */ |