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1 | /* | |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
5 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * utilities for mac80211 | |
12 | */ | |
13 | ||
14 | #include <net/mac80211.h> | |
15 | #include <linux/netdevice.h> | |
16 | #include <linux/export.h> | |
17 | #include <linux/types.h> | |
18 | #include <linux/slab.h> | |
19 | #include <linux/skbuff.h> | |
20 | #include <linux/etherdevice.h> | |
21 | #include <linux/if_arp.h> | |
22 | #include <linux/bitmap.h> | |
23 | #include <linux/crc32.h> | |
24 | #include <net/net_namespace.h> | |
25 | #include <net/cfg80211.h> | |
26 | #include <net/rtnetlink.h> | |
27 | ||
28 | #include "ieee80211_i.h" | |
29 | #include "driver-ops.h" | |
30 | #include "rate.h" | |
31 | #include "mesh.h" | |
32 | #include "wme.h" | |
33 | #include "led.h" | |
34 | #include "wep.h" | |
35 | ||
36 | /* privid for wiphys to determine whether they belong to us or not */ | |
37 | void *mac80211_wiphy_privid = &mac80211_wiphy_privid; | |
38 | ||
39 | struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy) | |
40 | { | |
41 | struct ieee80211_local *local; | |
42 | BUG_ON(!wiphy); | |
43 | ||
44 | local = wiphy_priv(wiphy); | |
45 | return &local->hw; | |
46 | } | |
47 | EXPORT_SYMBOL(wiphy_to_ieee80211_hw); | |
48 | ||
49 | u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len, | |
50 | enum nl80211_iftype type) | |
51 | { | |
52 | __le16 fc = hdr->frame_control; | |
53 | ||
54 | /* drop ACK/CTS frames and incorrect hdr len (ctrl) */ | |
55 | if (len < 16) | |
56 | return NULL; | |
57 | ||
58 | if (ieee80211_is_data(fc)) { | |
59 | if (len < 24) /* drop incorrect hdr len (data) */ | |
60 | return NULL; | |
61 | ||
62 | if (ieee80211_has_a4(fc)) | |
63 | return NULL; | |
64 | if (ieee80211_has_tods(fc)) | |
65 | return hdr->addr1; | |
66 | if (ieee80211_has_fromds(fc)) | |
67 | return hdr->addr2; | |
68 | ||
69 | return hdr->addr3; | |
70 | } | |
71 | ||
72 | if (ieee80211_is_mgmt(fc)) { | |
73 | if (len < 24) /* drop incorrect hdr len (mgmt) */ | |
74 | return NULL; | |
75 | return hdr->addr3; | |
76 | } | |
77 | ||
78 | if (ieee80211_is_ctl(fc)) { | |
79 | if(ieee80211_is_pspoll(fc)) | |
80 | return hdr->addr1; | |
81 | ||
82 | if (ieee80211_is_back_req(fc)) { | |
83 | switch (type) { | |
84 | case NL80211_IFTYPE_STATION: | |
85 | return hdr->addr2; | |
86 | case NL80211_IFTYPE_AP: | |
87 | case NL80211_IFTYPE_AP_VLAN: | |
88 | return hdr->addr1; | |
89 | default: | |
90 | break; /* fall through to the return */ | |
91 | } | |
92 | } | |
93 | } | |
94 | ||
95 | return NULL; | |
96 | } | |
97 | ||
98 | void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) | |
99 | { | |
100 | struct sk_buff *skb; | |
101 | struct ieee80211_hdr *hdr; | |
102 | ||
103 | skb_queue_walk(&tx->skbs, skb) { | |
104 | hdr = (struct ieee80211_hdr *) skb->data; | |
105 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
106 | } | |
107 | } | |
108 | ||
109 | int ieee80211_frame_duration(enum ieee80211_band band, size_t len, | |
110 | int rate, int erp, int short_preamble) | |
111 | { | |
112 | int dur; | |
113 | ||
114 | /* calculate duration (in microseconds, rounded up to next higher | |
115 | * integer if it includes a fractional microsecond) to send frame of | |
116 | * len bytes (does not include FCS) at the given rate. Duration will | |
117 | * also include SIFS. | |
118 | * | |
119 | * rate is in 100 kbps, so divident is multiplied by 10 in the | |
120 | * DIV_ROUND_UP() operations. | |
121 | */ | |
122 | ||
123 | if (band == IEEE80211_BAND_5GHZ || erp) { | |
124 | /* | |
125 | * OFDM: | |
126 | * | |
127 | * N_DBPS = DATARATE x 4 | |
128 | * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) | |
129 | * (16 = SIGNAL time, 6 = tail bits) | |
130 | * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext | |
131 | * | |
132 | * T_SYM = 4 usec | |
133 | * 802.11a - 17.5.2: aSIFSTime = 16 usec | |
134 | * 802.11g - 19.8.4: aSIFSTime = 10 usec + | |
135 | * signal ext = 6 usec | |
136 | */ | |
137 | dur = 16; /* SIFS + signal ext */ | |
138 | dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */ | |
139 | dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */ | |
140 | dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, | |
141 | 4 * rate); /* T_SYM x N_SYM */ | |
142 | } else { | |
143 | /* | |
144 | * 802.11b or 802.11g with 802.11b compatibility: | |
145 | * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + | |
146 | * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. | |
147 | * | |
148 | * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 | |
149 | * aSIFSTime = 10 usec | |
150 | * aPreambleLength = 144 usec or 72 usec with short preamble | |
151 | * aPLCPHeaderLength = 48 usec or 24 usec with short preamble | |
152 | */ | |
153 | dur = 10; /* aSIFSTime = 10 usec */ | |
154 | dur += short_preamble ? (72 + 24) : (144 + 48); | |
155 | ||
156 | dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); | |
157 | } | |
158 | ||
159 | return dur; | |
160 | } | |
161 | ||
162 | /* Exported duration function for driver use */ | |
163 | __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, | |
164 | struct ieee80211_vif *vif, | |
165 | enum ieee80211_band band, | |
166 | size_t frame_len, | |
167 | struct ieee80211_rate *rate) | |
168 | { | |
169 | struct ieee80211_sub_if_data *sdata; | |
170 | u16 dur; | |
171 | int erp; | |
172 | bool short_preamble = false; | |
173 | ||
174 | erp = 0; | |
175 | if (vif) { | |
176 | sdata = vif_to_sdata(vif); | |
177 | short_preamble = sdata->vif.bss_conf.use_short_preamble; | |
178 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) | |
179 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
180 | } | |
181 | ||
182 | dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp, | |
183 | short_preamble); | |
184 | ||
185 | return cpu_to_le16(dur); | |
186 | } | |
187 | EXPORT_SYMBOL(ieee80211_generic_frame_duration); | |
188 | ||
189 | __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, | |
190 | struct ieee80211_vif *vif, size_t frame_len, | |
191 | const struct ieee80211_tx_info *frame_txctl) | |
192 | { | |
193 | struct ieee80211_local *local = hw_to_local(hw); | |
194 | struct ieee80211_rate *rate; | |
195 | struct ieee80211_sub_if_data *sdata; | |
196 | bool short_preamble; | |
197 | int erp; | |
198 | u16 dur; | |
199 | struct ieee80211_supported_band *sband; | |
200 | ||
201 | sband = local->hw.wiphy->bands[frame_txctl->band]; | |
202 | ||
203 | short_preamble = false; | |
204 | ||
205 | rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; | |
206 | ||
207 | erp = 0; | |
208 | if (vif) { | |
209 | sdata = vif_to_sdata(vif); | |
210 | short_preamble = sdata->vif.bss_conf.use_short_preamble; | |
211 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) | |
212 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
213 | } | |
214 | ||
215 | /* CTS duration */ | |
216 | dur = ieee80211_frame_duration(sband->band, 10, rate->bitrate, | |
217 | erp, short_preamble); | |
218 | /* Data frame duration */ | |
219 | dur += ieee80211_frame_duration(sband->band, frame_len, rate->bitrate, | |
220 | erp, short_preamble); | |
221 | /* ACK duration */ | |
222 | dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate, | |
223 | erp, short_preamble); | |
224 | ||
225 | return cpu_to_le16(dur); | |
226 | } | |
227 | EXPORT_SYMBOL(ieee80211_rts_duration); | |
228 | ||
229 | __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, | |
230 | struct ieee80211_vif *vif, | |
231 | size_t frame_len, | |
232 | const struct ieee80211_tx_info *frame_txctl) | |
233 | { | |
234 | struct ieee80211_local *local = hw_to_local(hw); | |
235 | struct ieee80211_rate *rate; | |
236 | struct ieee80211_sub_if_data *sdata; | |
237 | bool short_preamble; | |
238 | int erp; | |
239 | u16 dur; | |
240 | struct ieee80211_supported_band *sband; | |
241 | ||
242 | sband = local->hw.wiphy->bands[frame_txctl->band]; | |
243 | ||
244 | short_preamble = false; | |
245 | ||
246 | rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; | |
247 | erp = 0; | |
248 | if (vif) { | |
249 | sdata = vif_to_sdata(vif); | |
250 | short_preamble = sdata->vif.bss_conf.use_short_preamble; | |
251 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) | |
252 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
253 | } | |
254 | ||
255 | /* Data frame duration */ | |
256 | dur = ieee80211_frame_duration(sband->band, frame_len, rate->bitrate, | |
257 | erp, short_preamble); | |
258 | if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { | |
259 | /* ACK duration */ | |
260 | dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate, | |
261 | erp, short_preamble); | |
262 | } | |
263 | ||
264 | return cpu_to_le16(dur); | |
265 | } | |
266 | EXPORT_SYMBOL(ieee80211_ctstoself_duration); | |
267 | ||
268 | void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue) | |
269 | { | |
270 | struct ieee80211_sub_if_data *sdata; | |
271 | int n_acs = IEEE80211_NUM_ACS; | |
272 | ||
273 | if (local->hw.queues < IEEE80211_NUM_ACS) | |
274 | n_acs = 1; | |
275 | ||
276 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
277 | int ac; | |
278 | ||
279 | if (!sdata->dev) | |
280 | continue; | |
281 | ||
282 | if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) | |
283 | continue; | |
284 | ||
285 | if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE && | |
286 | local->queue_stop_reasons[sdata->vif.cab_queue] != 0) | |
287 | continue; | |
288 | ||
289 | for (ac = 0; ac < n_acs; ac++) { | |
290 | int ac_queue = sdata->vif.hw_queue[ac]; | |
291 | ||
292 | if (ac_queue == queue || | |
293 | (sdata->vif.cab_queue == queue && | |
294 | local->queue_stop_reasons[ac_queue] == 0 && | |
295 | skb_queue_empty(&local->pending[ac_queue]))) | |
296 | netif_wake_subqueue(sdata->dev, ac); | |
297 | } | |
298 | } | |
299 | } | |
300 | ||
301 | static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, | |
302 | enum queue_stop_reason reason) | |
303 | { | |
304 | struct ieee80211_local *local = hw_to_local(hw); | |
305 | ||
306 | trace_wake_queue(local, queue, reason); | |
307 | ||
308 | if (WARN_ON(queue >= hw->queues)) | |
309 | return; | |
310 | ||
311 | if (!test_bit(reason, &local->queue_stop_reasons[queue])) | |
312 | return; | |
313 | ||
314 | __clear_bit(reason, &local->queue_stop_reasons[queue]); | |
315 | ||
316 | if (local->queue_stop_reasons[queue] != 0) | |
317 | /* someone still has this queue stopped */ | |
318 | return; | |
319 | ||
320 | if (skb_queue_empty(&local->pending[queue])) { | |
321 | rcu_read_lock(); | |
322 | ieee80211_propagate_queue_wake(local, queue); | |
323 | rcu_read_unlock(); | |
324 | } else | |
325 | tasklet_schedule(&local->tx_pending_tasklet); | |
326 | } | |
327 | ||
328 | void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, | |
329 | enum queue_stop_reason reason) | |
330 | { | |
331 | struct ieee80211_local *local = hw_to_local(hw); | |
332 | unsigned long flags; | |
333 | ||
334 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
335 | __ieee80211_wake_queue(hw, queue, reason); | |
336 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
337 | } | |
338 | ||
339 | void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) | |
340 | { | |
341 | ieee80211_wake_queue_by_reason(hw, queue, | |
342 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
343 | } | |
344 | EXPORT_SYMBOL(ieee80211_wake_queue); | |
345 | ||
346 | static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, | |
347 | enum queue_stop_reason reason) | |
348 | { | |
349 | struct ieee80211_local *local = hw_to_local(hw); | |
350 | struct ieee80211_sub_if_data *sdata; | |
351 | int n_acs = IEEE80211_NUM_ACS; | |
352 | ||
353 | trace_stop_queue(local, queue, reason); | |
354 | ||
355 | if (WARN_ON(queue >= hw->queues)) | |
356 | return; | |
357 | ||
358 | if (test_bit(reason, &local->queue_stop_reasons[queue])) | |
359 | return; | |
360 | ||
361 | __set_bit(reason, &local->queue_stop_reasons[queue]); | |
362 | ||
363 | if (local->hw.queues < IEEE80211_NUM_ACS) | |
364 | n_acs = 1; | |
365 | ||
366 | rcu_read_lock(); | |
367 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
368 | int ac; | |
369 | ||
370 | if (!sdata->dev) | |
371 | continue; | |
372 | ||
373 | for (ac = 0; ac < n_acs; ac++) { | |
374 | if (sdata->vif.hw_queue[ac] == queue || | |
375 | sdata->vif.cab_queue == queue) | |
376 | netif_stop_subqueue(sdata->dev, ac); | |
377 | } | |
378 | } | |
379 | rcu_read_unlock(); | |
380 | } | |
381 | ||
382 | void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, | |
383 | enum queue_stop_reason reason) | |
384 | { | |
385 | struct ieee80211_local *local = hw_to_local(hw); | |
386 | unsigned long flags; | |
387 | ||
388 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
389 | __ieee80211_stop_queue(hw, queue, reason); | |
390 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
391 | } | |
392 | ||
393 | void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) | |
394 | { | |
395 | ieee80211_stop_queue_by_reason(hw, queue, | |
396 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
397 | } | |
398 | EXPORT_SYMBOL(ieee80211_stop_queue); | |
399 | ||
400 | void ieee80211_add_pending_skb(struct ieee80211_local *local, | |
401 | struct sk_buff *skb) | |
402 | { | |
403 | struct ieee80211_hw *hw = &local->hw; | |
404 | unsigned long flags; | |
405 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
406 | int queue = info->hw_queue; | |
407 | ||
408 | if (WARN_ON(!info->control.vif)) { | |
409 | ieee80211_free_txskb(&local->hw, skb); | |
410 | return; | |
411 | } | |
412 | ||
413 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
414 | __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD); | |
415 | __skb_queue_tail(&local->pending[queue], skb); | |
416 | __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD); | |
417 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
418 | } | |
419 | ||
420 | void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local, | |
421 | struct sk_buff_head *skbs, | |
422 | void (*fn)(void *data), void *data) | |
423 | { | |
424 | struct ieee80211_hw *hw = &local->hw; | |
425 | struct sk_buff *skb; | |
426 | unsigned long flags; | |
427 | int queue, i; | |
428 | ||
429 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
430 | while ((skb = skb_dequeue(skbs))) { | |
431 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
432 | ||
433 | if (WARN_ON(!info->control.vif)) { | |
434 | ieee80211_free_txskb(&local->hw, skb); | |
435 | continue; | |
436 | } | |
437 | ||
438 | queue = info->hw_queue; | |
439 | ||
440 | __ieee80211_stop_queue(hw, queue, | |
441 | IEEE80211_QUEUE_STOP_REASON_SKB_ADD); | |
442 | ||
443 | __skb_queue_tail(&local->pending[queue], skb); | |
444 | } | |
445 | ||
446 | if (fn) | |
447 | fn(data); | |
448 | ||
449 | for (i = 0; i < hw->queues; i++) | |
450 | __ieee80211_wake_queue(hw, i, | |
451 | IEEE80211_QUEUE_STOP_REASON_SKB_ADD); | |
452 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
453 | } | |
454 | ||
455 | void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, | |
456 | unsigned long queues, | |
457 | enum queue_stop_reason reason) | |
458 | { | |
459 | struct ieee80211_local *local = hw_to_local(hw); | |
460 | unsigned long flags; | |
461 | int i; | |
462 | ||
463 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
464 | ||
465 | for_each_set_bit(i, &queues, hw->queues) | |
466 | __ieee80211_stop_queue(hw, i, reason); | |
467 | ||
468 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
469 | } | |
470 | ||
471 | void ieee80211_stop_queues(struct ieee80211_hw *hw) | |
472 | { | |
473 | ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, | |
474 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
475 | } | |
476 | EXPORT_SYMBOL(ieee80211_stop_queues); | |
477 | ||
478 | int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) | |
479 | { | |
480 | struct ieee80211_local *local = hw_to_local(hw); | |
481 | unsigned long flags; | |
482 | int ret; | |
483 | ||
484 | if (WARN_ON(queue >= hw->queues)) | |
485 | return true; | |
486 | ||
487 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
488 | ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER, | |
489 | &local->queue_stop_reasons[queue]); | |
490 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
491 | return ret; | |
492 | } | |
493 | EXPORT_SYMBOL(ieee80211_queue_stopped); | |
494 | ||
495 | void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, | |
496 | unsigned long queues, | |
497 | enum queue_stop_reason reason) | |
498 | { | |
499 | struct ieee80211_local *local = hw_to_local(hw); | |
500 | unsigned long flags; | |
501 | int i; | |
502 | ||
503 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
504 | ||
505 | for_each_set_bit(i, &queues, hw->queues) | |
506 | __ieee80211_wake_queue(hw, i, reason); | |
507 | ||
508 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
509 | } | |
510 | ||
511 | void ieee80211_wake_queues(struct ieee80211_hw *hw) | |
512 | { | |
513 | ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, | |
514 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
515 | } | |
516 | EXPORT_SYMBOL(ieee80211_wake_queues); | |
517 | ||
518 | void ieee80211_flush_queues(struct ieee80211_local *local, | |
519 | struct ieee80211_sub_if_data *sdata) | |
520 | { | |
521 | u32 queues; | |
522 | ||
523 | if (!local->ops->flush) | |
524 | return; | |
525 | ||
526 | if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) { | |
527 | int ac; | |
528 | ||
529 | queues = 0; | |
530 | ||
531 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) | |
532 | queues |= BIT(sdata->vif.hw_queue[ac]); | |
533 | if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE) | |
534 | queues |= BIT(sdata->vif.cab_queue); | |
535 | } else { | |
536 | /* all queues */ | |
537 | queues = BIT(local->hw.queues) - 1; | |
538 | } | |
539 | ||
540 | ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP, | |
541 | IEEE80211_QUEUE_STOP_REASON_FLUSH); | |
542 | ||
543 | drv_flush(local, queues, false); | |
544 | ||
545 | ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP, | |
546 | IEEE80211_QUEUE_STOP_REASON_FLUSH); | |
547 | } | |
548 | ||
549 | void ieee80211_iterate_active_interfaces( | |
550 | struct ieee80211_hw *hw, u32 iter_flags, | |
551 | void (*iterator)(void *data, u8 *mac, | |
552 | struct ieee80211_vif *vif), | |
553 | void *data) | |
554 | { | |
555 | struct ieee80211_local *local = hw_to_local(hw); | |
556 | struct ieee80211_sub_if_data *sdata; | |
557 | ||
558 | mutex_lock(&local->iflist_mtx); | |
559 | ||
560 | list_for_each_entry(sdata, &local->interfaces, list) { | |
561 | switch (sdata->vif.type) { | |
562 | case NL80211_IFTYPE_MONITOR: | |
563 | case NL80211_IFTYPE_AP_VLAN: | |
564 | continue; | |
565 | default: | |
566 | break; | |
567 | } | |
568 | if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) && | |
569 | !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) | |
570 | continue; | |
571 | if (ieee80211_sdata_running(sdata)) | |
572 | iterator(data, sdata->vif.addr, | |
573 | &sdata->vif); | |
574 | } | |
575 | ||
576 | sdata = rcu_dereference_protected(local->monitor_sdata, | |
577 | lockdep_is_held(&local->iflist_mtx)); | |
578 | if (sdata && | |
579 | (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || | |
580 | sdata->flags & IEEE80211_SDATA_IN_DRIVER)) | |
581 | iterator(data, sdata->vif.addr, &sdata->vif); | |
582 | ||
583 | mutex_unlock(&local->iflist_mtx); | |
584 | } | |
585 | EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces); | |
586 | ||
587 | void ieee80211_iterate_active_interfaces_atomic( | |
588 | struct ieee80211_hw *hw, u32 iter_flags, | |
589 | void (*iterator)(void *data, u8 *mac, | |
590 | struct ieee80211_vif *vif), | |
591 | void *data) | |
592 | { | |
593 | struct ieee80211_local *local = hw_to_local(hw); | |
594 | struct ieee80211_sub_if_data *sdata; | |
595 | ||
596 | rcu_read_lock(); | |
597 | ||
598 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
599 | switch (sdata->vif.type) { | |
600 | case NL80211_IFTYPE_MONITOR: | |
601 | case NL80211_IFTYPE_AP_VLAN: | |
602 | continue; | |
603 | default: | |
604 | break; | |
605 | } | |
606 | if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) && | |
607 | !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) | |
608 | continue; | |
609 | if (ieee80211_sdata_running(sdata)) | |
610 | iterator(data, sdata->vif.addr, | |
611 | &sdata->vif); | |
612 | } | |
613 | ||
614 | sdata = rcu_dereference(local->monitor_sdata); | |
615 | if (sdata && | |
616 | (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || | |
617 | sdata->flags & IEEE80211_SDATA_IN_DRIVER)) | |
618 | iterator(data, sdata->vif.addr, &sdata->vif); | |
619 | ||
620 | rcu_read_unlock(); | |
621 | } | |
622 | EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); | |
623 | ||
624 | /* | |
625 | * Nothing should have been stuffed into the workqueue during | |
626 | * the suspend->resume cycle. If this WARN is seen then there | |
627 | * is a bug with either the driver suspend or something in | |
628 | * mac80211 stuffing into the workqueue which we haven't yet | |
629 | * cleared during mac80211's suspend cycle. | |
630 | */ | |
631 | static bool ieee80211_can_queue_work(struct ieee80211_local *local) | |
632 | { | |
633 | if (WARN(local->suspended && !local->resuming, | |
634 | "queueing ieee80211 work while going to suspend\n")) | |
635 | return false; | |
636 | ||
637 | return true; | |
638 | } | |
639 | ||
640 | void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) | |
641 | { | |
642 | struct ieee80211_local *local = hw_to_local(hw); | |
643 | ||
644 | if (!ieee80211_can_queue_work(local)) | |
645 | return; | |
646 | ||
647 | queue_work(local->workqueue, work); | |
648 | } | |
649 | EXPORT_SYMBOL(ieee80211_queue_work); | |
650 | ||
651 | void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, | |
652 | struct delayed_work *dwork, | |
653 | unsigned long delay) | |
654 | { | |
655 | struct ieee80211_local *local = hw_to_local(hw); | |
656 | ||
657 | if (!ieee80211_can_queue_work(local)) | |
658 | return; | |
659 | ||
660 | queue_delayed_work(local->workqueue, dwork, delay); | |
661 | } | |
662 | EXPORT_SYMBOL(ieee80211_queue_delayed_work); | |
663 | ||
664 | u32 ieee802_11_parse_elems_crc(u8 *start, size_t len, bool action, | |
665 | struct ieee802_11_elems *elems, | |
666 | u64 filter, u32 crc) | |
667 | { | |
668 | size_t left = len; | |
669 | u8 *pos = start; | |
670 | bool calc_crc = filter != 0; | |
671 | DECLARE_BITMAP(seen_elems, 256); | |
672 | const u8 *ie; | |
673 | ||
674 | bitmap_zero(seen_elems, 256); | |
675 | memset(elems, 0, sizeof(*elems)); | |
676 | elems->ie_start = start; | |
677 | elems->total_len = len; | |
678 | ||
679 | while (left >= 2) { | |
680 | u8 id, elen; | |
681 | bool elem_parse_failed; | |
682 | ||
683 | id = *pos++; | |
684 | elen = *pos++; | |
685 | left -= 2; | |
686 | ||
687 | if (elen > left) { | |
688 | elems->parse_error = true; | |
689 | break; | |
690 | } | |
691 | ||
692 | switch (id) { | |
693 | case WLAN_EID_SSID: | |
694 | case WLAN_EID_SUPP_RATES: | |
695 | case WLAN_EID_FH_PARAMS: | |
696 | case WLAN_EID_DS_PARAMS: | |
697 | case WLAN_EID_CF_PARAMS: | |
698 | case WLAN_EID_TIM: | |
699 | case WLAN_EID_IBSS_PARAMS: | |
700 | case WLAN_EID_CHALLENGE: | |
701 | case WLAN_EID_RSN: | |
702 | case WLAN_EID_ERP_INFO: | |
703 | case WLAN_EID_EXT_SUPP_RATES: | |
704 | case WLAN_EID_HT_CAPABILITY: | |
705 | case WLAN_EID_HT_OPERATION: | |
706 | case WLAN_EID_VHT_CAPABILITY: | |
707 | case WLAN_EID_VHT_OPERATION: | |
708 | case WLAN_EID_MESH_ID: | |
709 | case WLAN_EID_MESH_CONFIG: | |
710 | case WLAN_EID_PEER_MGMT: | |
711 | case WLAN_EID_PREQ: | |
712 | case WLAN_EID_PREP: | |
713 | case WLAN_EID_PERR: | |
714 | case WLAN_EID_RANN: | |
715 | case WLAN_EID_CHANNEL_SWITCH: | |
716 | case WLAN_EID_EXT_CHANSWITCH_ANN: | |
717 | case WLAN_EID_COUNTRY: | |
718 | case WLAN_EID_PWR_CONSTRAINT: | |
719 | case WLAN_EID_TIMEOUT_INTERVAL: | |
720 | case WLAN_EID_SECONDARY_CHANNEL_OFFSET: | |
721 | case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: | |
722 | /* | |
723 | * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible | |
724 | * that if the content gets bigger it might be needed more than once | |
725 | */ | |
726 | if (test_bit(id, seen_elems)) { | |
727 | elems->parse_error = true; | |
728 | left -= elen; | |
729 | pos += elen; | |
730 | continue; | |
731 | } | |
732 | break; | |
733 | } | |
734 | ||
735 | if (calc_crc && id < 64 && (filter & (1ULL << id))) | |
736 | crc = crc32_be(crc, pos - 2, elen + 2); | |
737 | ||
738 | elem_parse_failed = false; | |
739 | ||
740 | switch (id) { | |
741 | case WLAN_EID_SSID: | |
742 | elems->ssid = pos; | |
743 | elems->ssid_len = elen; | |
744 | break; | |
745 | case WLAN_EID_SUPP_RATES: | |
746 | elems->supp_rates = pos; | |
747 | elems->supp_rates_len = elen; | |
748 | break; | |
749 | case WLAN_EID_DS_PARAMS: | |
750 | if (elen >= 1) | |
751 | elems->ds_params = pos; | |
752 | else | |
753 | elem_parse_failed = true; | |
754 | break; | |
755 | case WLAN_EID_TIM: | |
756 | if (elen >= sizeof(struct ieee80211_tim_ie)) { | |
757 | elems->tim = (void *)pos; | |
758 | elems->tim_len = elen; | |
759 | } else | |
760 | elem_parse_failed = true; | |
761 | break; | |
762 | case WLAN_EID_CHALLENGE: | |
763 | elems->challenge = pos; | |
764 | elems->challenge_len = elen; | |
765 | break; | |
766 | case WLAN_EID_VENDOR_SPECIFIC: | |
767 | if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && | |
768 | pos[2] == 0xf2) { | |
769 | /* Microsoft OUI (00:50:F2) */ | |
770 | ||
771 | if (calc_crc) | |
772 | crc = crc32_be(crc, pos - 2, elen + 2); | |
773 | ||
774 | if (elen >= 5 && pos[3] == 2) { | |
775 | /* OUI Type 2 - WMM IE */ | |
776 | if (pos[4] == 0) { | |
777 | elems->wmm_info = pos; | |
778 | elems->wmm_info_len = elen; | |
779 | } else if (pos[4] == 1) { | |
780 | elems->wmm_param = pos; | |
781 | elems->wmm_param_len = elen; | |
782 | } | |
783 | } | |
784 | } | |
785 | break; | |
786 | case WLAN_EID_RSN: | |
787 | elems->rsn = pos; | |
788 | elems->rsn_len = elen; | |
789 | break; | |
790 | case WLAN_EID_ERP_INFO: | |
791 | if (elen >= 1) | |
792 | elems->erp_info = pos; | |
793 | else | |
794 | elem_parse_failed = true; | |
795 | break; | |
796 | case WLAN_EID_EXT_SUPP_RATES: | |
797 | elems->ext_supp_rates = pos; | |
798 | elems->ext_supp_rates_len = elen; | |
799 | break; | |
800 | case WLAN_EID_HT_CAPABILITY: | |
801 | if (elen >= sizeof(struct ieee80211_ht_cap)) | |
802 | elems->ht_cap_elem = (void *)pos; | |
803 | else | |
804 | elem_parse_failed = true; | |
805 | break; | |
806 | case WLAN_EID_HT_OPERATION: | |
807 | if (elen >= sizeof(struct ieee80211_ht_operation)) | |
808 | elems->ht_operation = (void *)pos; | |
809 | else | |
810 | elem_parse_failed = true; | |
811 | break; | |
812 | case WLAN_EID_VHT_CAPABILITY: | |
813 | if (elen >= sizeof(struct ieee80211_vht_cap)) | |
814 | elems->vht_cap_elem = (void *)pos; | |
815 | else | |
816 | elem_parse_failed = true; | |
817 | break; | |
818 | case WLAN_EID_VHT_OPERATION: | |
819 | if (elen >= sizeof(struct ieee80211_vht_operation)) | |
820 | elems->vht_operation = (void *)pos; | |
821 | else | |
822 | elem_parse_failed = true; | |
823 | break; | |
824 | case WLAN_EID_OPMODE_NOTIF: | |
825 | if (elen > 0) | |
826 | elems->opmode_notif = pos; | |
827 | else | |
828 | elem_parse_failed = true; | |
829 | break; | |
830 | case WLAN_EID_MESH_ID: | |
831 | elems->mesh_id = pos; | |
832 | elems->mesh_id_len = elen; | |
833 | break; | |
834 | case WLAN_EID_MESH_CONFIG: | |
835 | if (elen >= sizeof(struct ieee80211_meshconf_ie)) | |
836 | elems->mesh_config = (void *)pos; | |
837 | else | |
838 | elem_parse_failed = true; | |
839 | break; | |
840 | case WLAN_EID_PEER_MGMT: | |
841 | elems->peering = pos; | |
842 | elems->peering_len = elen; | |
843 | break; | |
844 | case WLAN_EID_MESH_AWAKE_WINDOW: | |
845 | if (elen >= 2) | |
846 | elems->awake_window = (void *)pos; | |
847 | break; | |
848 | case WLAN_EID_PREQ: | |
849 | elems->preq = pos; | |
850 | elems->preq_len = elen; | |
851 | break; | |
852 | case WLAN_EID_PREP: | |
853 | elems->prep = pos; | |
854 | elems->prep_len = elen; | |
855 | break; | |
856 | case WLAN_EID_PERR: | |
857 | elems->perr = pos; | |
858 | elems->perr_len = elen; | |
859 | break; | |
860 | case WLAN_EID_RANN: | |
861 | if (elen >= sizeof(struct ieee80211_rann_ie)) | |
862 | elems->rann = (void *)pos; | |
863 | else | |
864 | elem_parse_failed = true; | |
865 | break; | |
866 | case WLAN_EID_CHANNEL_SWITCH: | |
867 | if (elen != sizeof(struct ieee80211_channel_sw_ie)) { | |
868 | elem_parse_failed = true; | |
869 | break; | |
870 | } | |
871 | elems->ch_switch_ie = (void *)pos; | |
872 | break; | |
873 | case WLAN_EID_EXT_CHANSWITCH_ANN: | |
874 | if (elen != sizeof(struct ieee80211_ext_chansw_ie)) { | |
875 | elem_parse_failed = true; | |
876 | break; | |
877 | } | |
878 | elems->ext_chansw_ie = (void *)pos; | |
879 | break; | |
880 | case WLAN_EID_SECONDARY_CHANNEL_OFFSET: | |
881 | if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) { | |
882 | elem_parse_failed = true; | |
883 | break; | |
884 | } | |
885 | elems->sec_chan_offs = (void *)pos; | |
886 | break; | |
887 | case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: | |
888 | if (!action || | |
889 | elen != sizeof(*elems->wide_bw_chansw_ie)) { | |
890 | elem_parse_failed = true; | |
891 | break; | |
892 | } | |
893 | elems->wide_bw_chansw_ie = (void *)pos; | |
894 | break; | |
895 | case WLAN_EID_CHANNEL_SWITCH_WRAPPER: | |
896 | if (action) { | |
897 | elem_parse_failed = true; | |
898 | break; | |
899 | } | |
900 | /* | |
901 | * This is a bit tricky, but as we only care about | |
902 | * the wide bandwidth channel switch element, so | |
903 | * just parse it out manually. | |
904 | */ | |
905 | ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH, | |
906 | pos, elen); | |
907 | if (ie) { | |
908 | if (ie[1] == sizeof(*elems->wide_bw_chansw_ie)) | |
909 | elems->wide_bw_chansw_ie = | |
910 | (void *)(ie + 2); | |
911 | else | |
912 | elem_parse_failed = true; | |
913 | } | |
914 | break; | |
915 | case WLAN_EID_COUNTRY: | |
916 | elems->country_elem = pos; | |
917 | elems->country_elem_len = elen; | |
918 | break; | |
919 | case WLAN_EID_PWR_CONSTRAINT: | |
920 | if (elen != 1) { | |
921 | elem_parse_failed = true; | |
922 | break; | |
923 | } | |
924 | elems->pwr_constr_elem = pos; | |
925 | break; | |
926 | case WLAN_EID_TIMEOUT_INTERVAL: | |
927 | if (elen >= sizeof(struct ieee80211_timeout_interval_ie)) | |
928 | elems->timeout_int = (void *)pos; | |
929 | else | |
930 | elem_parse_failed = true; | |
931 | break; | |
932 | default: | |
933 | break; | |
934 | } | |
935 | ||
936 | if (elem_parse_failed) | |
937 | elems->parse_error = true; | |
938 | else | |
939 | __set_bit(id, seen_elems); | |
940 | ||
941 | left -= elen; | |
942 | pos += elen; | |
943 | } | |
944 | ||
945 | if (left != 0) | |
946 | elems->parse_error = true; | |
947 | ||
948 | return crc; | |
949 | } | |
950 | ||
951 | void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata, | |
952 | bool bss_notify) | |
953 | { | |
954 | struct ieee80211_local *local = sdata->local; | |
955 | struct ieee80211_tx_queue_params qparam; | |
956 | struct ieee80211_chanctx_conf *chanctx_conf; | |
957 | int ac; | |
958 | bool use_11b, enable_qos; | |
959 | int aCWmin, aCWmax; | |
960 | ||
961 | if (!local->ops->conf_tx) | |
962 | return; | |
963 | ||
964 | if (local->hw.queues < IEEE80211_NUM_ACS) | |
965 | return; | |
966 | ||
967 | memset(&qparam, 0, sizeof(qparam)); | |
968 | ||
969 | rcu_read_lock(); | |
970 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
971 | use_11b = (chanctx_conf && | |
972 | chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) && | |
973 | !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE); | |
974 | rcu_read_unlock(); | |
975 | ||
976 | /* | |
977 | * By default disable QoS in STA mode for old access points, which do | |
978 | * not support 802.11e. New APs will provide proper queue parameters, | |
979 | * that we will configure later. | |
980 | */ | |
981 | enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION); | |
982 | ||
983 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
984 | /* Set defaults according to 802.11-2007 Table 7-37 */ | |
985 | aCWmax = 1023; | |
986 | if (use_11b) | |
987 | aCWmin = 31; | |
988 | else | |
989 | aCWmin = 15; | |
990 | ||
991 | if (enable_qos) { | |
992 | switch (ac) { | |
993 | case IEEE80211_AC_BK: | |
994 | qparam.cw_max = aCWmax; | |
995 | qparam.cw_min = aCWmin; | |
996 | qparam.txop = 0; | |
997 | qparam.aifs = 7; | |
998 | break; | |
999 | /* never happens but let's not leave undefined */ | |
1000 | default: | |
1001 | case IEEE80211_AC_BE: | |
1002 | qparam.cw_max = aCWmax; | |
1003 | qparam.cw_min = aCWmin; | |
1004 | qparam.txop = 0; | |
1005 | qparam.aifs = 3; | |
1006 | break; | |
1007 | case IEEE80211_AC_VI: | |
1008 | qparam.cw_max = aCWmin; | |
1009 | qparam.cw_min = (aCWmin + 1) / 2 - 1; | |
1010 | if (use_11b) | |
1011 | qparam.txop = 6016/32; | |
1012 | else | |
1013 | qparam.txop = 3008/32; | |
1014 | qparam.aifs = 2; | |
1015 | break; | |
1016 | case IEEE80211_AC_VO: | |
1017 | qparam.cw_max = (aCWmin + 1) / 2 - 1; | |
1018 | qparam.cw_min = (aCWmin + 1) / 4 - 1; | |
1019 | if (use_11b) | |
1020 | qparam.txop = 3264/32; | |
1021 | else | |
1022 | qparam.txop = 1504/32; | |
1023 | qparam.aifs = 2; | |
1024 | break; | |
1025 | } | |
1026 | } else { | |
1027 | /* Confiure old 802.11b/g medium access rules. */ | |
1028 | qparam.cw_max = aCWmax; | |
1029 | qparam.cw_min = aCWmin; | |
1030 | qparam.txop = 0; | |
1031 | qparam.aifs = 2; | |
1032 | } | |
1033 | ||
1034 | qparam.uapsd = false; | |
1035 | ||
1036 | sdata->tx_conf[ac] = qparam; | |
1037 | drv_conf_tx(local, sdata, ac, &qparam); | |
1038 | } | |
1039 | ||
1040 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR && | |
1041 | sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) { | |
1042 | sdata->vif.bss_conf.qos = enable_qos; | |
1043 | if (bss_notify) | |
1044 | ieee80211_bss_info_change_notify(sdata, | |
1045 | BSS_CHANGED_QOS); | |
1046 | } | |
1047 | } | |
1048 | ||
1049 | void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata, | |
1050 | const size_t supp_rates_len, | |
1051 | const u8 *supp_rates) | |
1052 | { | |
1053 | struct ieee80211_chanctx_conf *chanctx_conf; | |
1054 | int i, have_higher_than_11mbit = 0; | |
1055 | ||
1056 | /* cf. IEEE 802.11 9.2.12 */ | |
1057 | for (i = 0; i < supp_rates_len; i++) | |
1058 | if ((supp_rates[i] & 0x7f) * 5 > 110) | |
1059 | have_higher_than_11mbit = 1; | |
1060 | ||
1061 | rcu_read_lock(); | |
1062 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
1063 | ||
1064 | if (chanctx_conf && | |
1065 | chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ && | |
1066 | have_higher_than_11mbit) | |
1067 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
1068 | else | |
1069 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
1070 | rcu_read_unlock(); | |
1071 | ||
1072 | ieee80211_set_wmm_default(sdata, true); | |
1073 | } | |
1074 | ||
1075 | u32 ieee80211_mandatory_rates(struct ieee80211_local *local, | |
1076 | enum ieee80211_band band) | |
1077 | { | |
1078 | struct ieee80211_supported_band *sband; | |
1079 | struct ieee80211_rate *bitrates; | |
1080 | u32 mandatory_rates; | |
1081 | enum ieee80211_rate_flags mandatory_flag; | |
1082 | int i; | |
1083 | ||
1084 | sband = local->hw.wiphy->bands[band]; | |
1085 | if (WARN_ON(!sband)) | |
1086 | return 1; | |
1087 | ||
1088 | if (band == IEEE80211_BAND_2GHZ) | |
1089 | mandatory_flag = IEEE80211_RATE_MANDATORY_B; | |
1090 | else | |
1091 | mandatory_flag = IEEE80211_RATE_MANDATORY_A; | |
1092 | ||
1093 | bitrates = sband->bitrates; | |
1094 | mandatory_rates = 0; | |
1095 | for (i = 0; i < sband->n_bitrates; i++) | |
1096 | if (bitrates[i].flags & mandatory_flag) | |
1097 | mandatory_rates |= BIT(i); | |
1098 | return mandatory_rates; | |
1099 | } | |
1100 | ||
1101 | void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, | |
1102 | u16 transaction, u16 auth_alg, u16 status, | |
1103 | const u8 *extra, size_t extra_len, const u8 *da, | |
1104 | const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx, | |
1105 | u32 tx_flags) | |
1106 | { | |
1107 | struct ieee80211_local *local = sdata->local; | |
1108 | struct sk_buff *skb; | |
1109 | struct ieee80211_mgmt *mgmt; | |
1110 | int err; | |
1111 | ||
1112 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
1113 | sizeof(*mgmt) + 6 + extra_len); | |
1114 | if (!skb) | |
1115 | return; | |
1116 | ||
1117 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1118 | ||
1119 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); | |
1120 | memset(mgmt, 0, 24 + 6); | |
1121 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
1122 | IEEE80211_STYPE_AUTH); | |
1123 | memcpy(mgmt->da, da, ETH_ALEN); | |
1124 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); | |
1125 | memcpy(mgmt->bssid, bssid, ETH_ALEN); | |
1126 | mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); | |
1127 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); | |
1128 | mgmt->u.auth.status_code = cpu_to_le16(status); | |
1129 | if (extra) | |
1130 | memcpy(skb_put(skb, extra_len), extra, extra_len); | |
1131 | ||
1132 | if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { | |
1133 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
1134 | err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); | |
1135 | WARN_ON(err); | |
1136 | } | |
1137 | ||
1138 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | | |
1139 | tx_flags; | |
1140 | ieee80211_tx_skb(sdata, skb); | |
1141 | } | |
1142 | ||
1143 | void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, | |
1144 | const u8 *bssid, u16 stype, u16 reason, | |
1145 | bool send_frame, u8 *frame_buf) | |
1146 | { | |
1147 | struct ieee80211_local *local = sdata->local; | |
1148 | struct sk_buff *skb; | |
1149 | struct ieee80211_mgmt *mgmt = (void *)frame_buf; | |
1150 | ||
1151 | /* build frame */ | |
1152 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); | |
1153 | mgmt->duration = 0; /* initialize only */ | |
1154 | mgmt->seq_ctrl = 0; /* initialize only */ | |
1155 | memcpy(mgmt->da, bssid, ETH_ALEN); | |
1156 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); | |
1157 | memcpy(mgmt->bssid, bssid, ETH_ALEN); | |
1158 | /* u.deauth.reason_code == u.disassoc.reason_code */ | |
1159 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); | |
1160 | ||
1161 | if (send_frame) { | |
1162 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
1163 | IEEE80211_DEAUTH_FRAME_LEN); | |
1164 | if (!skb) | |
1165 | return; | |
1166 | ||
1167 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1168 | ||
1169 | /* copy in frame */ | |
1170 | memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN), | |
1171 | mgmt, IEEE80211_DEAUTH_FRAME_LEN); | |
1172 | ||
1173 | if (sdata->vif.type != NL80211_IFTYPE_STATION || | |
1174 | !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED)) | |
1175 | IEEE80211_SKB_CB(skb)->flags |= | |
1176 | IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
1177 | ||
1178 | ieee80211_tx_skb(sdata, skb); | |
1179 | } | |
1180 | } | |
1181 | ||
1182 | int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, | |
1183 | size_t buffer_len, const u8 *ie, size_t ie_len, | |
1184 | enum ieee80211_band band, u32 rate_mask, | |
1185 | u8 channel) | |
1186 | { | |
1187 | struct ieee80211_supported_band *sband; | |
1188 | u8 *pos = buffer, *end = buffer + buffer_len; | |
1189 | size_t offset = 0, noffset; | |
1190 | int supp_rates_len, i; | |
1191 | u8 rates[32]; | |
1192 | int num_rates; | |
1193 | int ext_rates_len; | |
1194 | ||
1195 | sband = local->hw.wiphy->bands[band]; | |
1196 | if (WARN_ON_ONCE(!sband)) | |
1197 | return 0; | |
1198 | ||
1199 | num_rates = 0; | |
1200 | for (i = 0; i < sband->n_bitrates; i++) { | |
1201 | if ((BIT(i) & rate_mask) == 0) | |
1202 | continue; /* skip rate */ | |
1203 | rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5); | |
1204 | } | |
1205 | ||
1206 | supp_rates_len = min_t(int, num_rates, 8); | |
1207 | ||
1208 | if (end - pos < 2 + supp_rates_len) | |
1209 | goto out_err; | |
1210 | *pos++ = WLAN_EID_SUPP_RATES; | |
1211 | *pos++ = supp_rates_len; | |
1212 | memcpy(pos, rates, supp_rates_len); | |
1213 | pos += supp_rates_len; | |
1214 | ||
1215 | /* insert "request information" if in custom IEs */ | |
1216 | if (ie && ie_len) { | |
1217 | static const u8 before_extrates[] = { | |
1218 | WLAN_EID_SSID, | |
1219 | WLAN_EID_SUPP_RATES, | |
1220 | WLAN_EID_REQUEST, | |
1221 | }; | |
1222 | noffset = ieee80211_ie_split(ie, ie_len, | |
1223 | before_extrates, | |
1224 | ARRAY_SIZE(before_extrates), | |
1225 | offset); | |
1226 | if (end - pos < noffset - offset) | |
1227 | goto out_err; | |
1228 | memcpy(pos, ie + offset, noffset - offset); | |
1229 | pos += noffset - offset; | |
1230 | offset = noffset; | |
1231 | } | |
1232 | ||
1233 | ext_rates_len = num_rates - supp_rates_len; | |
1234 | if (ext_rates_len > 0) { | |
1235 | if (end - pos < 2 + ext_rates_len) | |
1236 | goto out_err; | |
1237 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
1238 | *pos++ = ext_rates_len; | |
1239 | memcpy(pos, rates + supp_rates_len, ext_rates_len); | |
1240 | pos += ext_rates_len; | |
1241 | } | |
1242 | ||
1243 | if (channel && sband->band == IEEE80211_BAND_2GHZ) { | |
1244 | if (end - pos < 3) | |
1245 | goto out_err; | |
1246 | *pos++ = WLAN_EID_DS_PARAMS; | |
1247 | *pos++ = 1; | |
1248 | *pos++ = channel; | |
1249 | } | |
1250 | ||
1251 | /* insert custom IEs that go before HT */ | |
1252 | if (ie && ie_len) { | |
1253 | static const u8 before_ht[] = { | |
1254 | WLAN_EID_SSID, | |
1255 | WLAN_EID_SUPP_RATES, | |
1256 | WLAN_EID_REQUEST, | |
1257 | WLAN_EID_EXT_SUPP_RATES, | |
1258 | WLAN_EID_DS_PARAMS, | |
1259 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
1260 | }; | |
1261 | noffset = ieee80211_ie_split(ie, ie_len, | |
1262 | before_ht, ARRAY_SIZE(before_ht), | |
1263 | offset); | |
1264 | if (end - pos < noffset - offset) | |
1265 | goto out_err; | |
1266 | memcpy(pos, ie + offset, noffset - offset); | |
1267 | pos += noffset - offset; | |
1268 | offset = noffset; | |
1269 | } | |
1270 | ||
1271 | if (sband->ht_cap.ht_supported) { | |
1272 | if (end - pos < 2 + sizeof(struct ieee80211_ht_cap)) | |
1273 | goto out_err; | |
1274 | pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, | |
1275 | sband->ht_cap.cap); | |
1276 | } | |
1277 | ||
1278 | /* | |
1279 | * If adding more here, adjust code in main.c | |
1280 | * that calculates local->scan_ies_len. | |
1281 | */ | |
1282 | ||
1283 | /* add any remaining custom IEs */ | |
1284 | if (ie && ie_len) { | |
1285 | noffset = ie_len; | |
1286 | if (end - pos < noffset - offset) | |
1287 | goto out_err; | |
1288 | memcpy(pos, ie + offset, noffset - offset); | |
1289 | pos += noffset - offset; | |
1290 | } | |
1291 | ||
1292 | if (sband->vht_cap.vht_supported) { | |
1293 | if (end - pos < 2 + sizeof(struct ieee80211_vht_cap)) | |
1294 | goto out_err; | |
1295 | pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, | |
1296 | sband->vht_cap.cap); | |
1297 | } | |
1298 | ||
1299 | return pos - buffer; | |
1300 | out_err: | |
1301 | WARN_ONCE(1, "not enough space for preq IEs\n"); | |
1302 | return pos - buffer; | |
1303 | } | |
1304 | ||
1305 | struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, | |
1306 | u8 *dst, u32 ratemask, | |
1307 | struct ieee80211_channel *chan, | |
1308 | const u8 *ssid, size_t ssid_len, | |
1309 | const u8 *ie, size_t ie_len, | |
1310 | bool directed) | |
1311 | { | |
1312 | struct ieee80211_local *local = sdata->local; | |
1313 | struct sk_buff *skb; | |
1314 | struct ieee80211_mgmt *mgmt; | |
1315 | u8 chan_no; | |
1316 | int ies_len; | |
1317 | ||
1318 | /* | |
1319 | * Do not send DS Channel parameter for directed probe requests | |
1320 | * in order to maximize the chance that we get a response. Some | |
1321 | * badly-behaved APs don't respond when this parameter is included. | |
1322 | */ | |
1323 | if (directed) | |
1324 | chan_no = 0; | |
1325 | else | |
1326 | chan_no = ieee80211_frequency_to_channel(chan->center_freq); | |
1327 | ||
1328 | skb = ieee80211_probereq_get(&local->hw, &sdata->vif, | |
1329 | ssid, ssid_len, 100 + ie_len); | |
1330 | if (!skb) | |
1331 | return NULL; | |
1332 | ||
1333 | ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb), | |
1334 | skb_tailroom(skb), | |
1335 | ie, ie_len, chan->band, | |
1336 | ratemask, chan_no); | |
1337 | skb_put(skb, ies_len); | |
1338 | ||
1339 | if (dst) { | |
1340 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1341 | memcpy(mgmt->da, dst, ETH_ALEN); | |
1342 | memcpy(mgmt->bssid, dst, ETH_ALEN); | |
1343 | } | |
1344 | ||
1345 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
1346 | ||
1347 | return skb; | |
1348 | } | |
1349 | ||
1350 | void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, | |
1351 | const u8 *ssid, size_t ssid_len, | |
1352 | const u8 *ie, size_t ie_len, | |
1353 | u32 ratemask, bool directed, u32 tx_flags, | |
1354 | struct ieee80211_channel *channel, bool scan) | |
1355 | { | |
1356 | struct sk_buff *skb; | |
1357 | ||
1358 | skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel, | |
1359 | ssid, ssid_len, | |
1360 | ie, ie_len, directed); | |
1361 | if (skb) { | |
1362 | IEEE80211_SKB_CB(skb)->flags |= tx_flags; | |
1363 | if (scan) | |
1364 | ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band); | |
1365 | else | |
1366 | ieee80211_tx_skb(sdata, skb); | |
1367 | } | |
1368 | } | |
1369 | ||
1370 | u32 ieee80211_sta_get_rates(struct ieee80211_local *local, | |
1371 | struct ieee802_11_elems *elems, | |
1372 | enum ieee80211_band band, u32 *basic_rates) | |
1373 | { | |
1374 | struct ieee80211_supported_band *sband; | |
1375 | struct ieee80211_rate *bitrates; | |
1376 | size_t num_rates; | |
1377 | u32 supp_rates; | |
1378 | int i, j; | |
1379 | sband = local->hw.wiphy->bands[band]; | |
1380 | ||
1381 | if (WARN_ON(!sband)) | |
1382 | return 1; | |
1383 | ||
1384 | bitrates = sband->bitrates; | |
1385 | num_rates = sband->n_bitrates; | |
1386 | supp_rates = 0; | |
1387 | for (i = 0; i < elems->supp_rates_len + | |
1388 | elems->ext_supp_rates_len; i++) { | |
1389 | u8 rate = 0; | |
1390 | int own_rate; | |
1391 | bool is_basic; | |
1392 | if (i < elems->supp_rates_len) | |
1393 | rate = elems->supp_rates[i]; | |
1394 | else if (elems->ext_supp_rates) | |
1395 | rate = elems->ext_supp_rates | |
1396 | [i - elems->supp_rates_len]; | |
1397 | own_rate = 5 * (rate & 0x7f); | |
1398 | is_basic = !!(rate & 0x80); | |
1399 | ||
1400 | if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) | |
1401 | continue; | |
1402 | ||
1403 | for (j = 0; j < num_rates; j++) { | |
1404 | if (bitrates[j].bitrate == own_rate) { | |
1405 | supp_rates |= BIT(j); | |
1406 | if (basic_rates && is_basic) | |
1407 | *basic_rates |= BIT(j); | |
1408 | } | |
1409 | } | |
1410 | } | |
1411 | return supp_rates; | |
1412 | } | |
1413 | ||
1414 | void ieee80211_stop_device(struct ieee80211_local *local) | |
1415 | { | |
1416 | ieee80211_led_radio(local, false); | |
1417 | ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); | |
1418 | ||
1419 | cancel_work_sync(&local->reconfig_filter); | |
1420 | ||
1421 | flush_workqueue(local->workqueue); | |
1422 | drv_stop(local); | |
1423 | } | |
1424 | ||
1425 | static void ieee80211_assign_chanctx(struct ieee80211_local *local, | |
1426 | struct ieee80211_sub_if_data *sdata) | |
1427 | { | |
1428 | struct ieee80211_chanctx_conf *conf; | |
1429 | struct ieee80211_chanctx *ctx; | |
1430 | ||
1431 | if (!local->use_chanctx) | |
1432 | return; | |
1433 | ||
1434 | mutex_lock(&local->chanctx_mtx); | |
1435 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
1436 | lockdep_is_held(&local->chanctx_mtx)); | |
1437 | if (conf) { | |
1438 | ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
1439 | drv_assign_vif_chanctx(local, sdata, ctx); | |
1440 | } | |
1441 | mutex_unlock(&local->chanctx_mtx); | |
1442 | } | |
1443 | ||
1444 | int ieee80211_reconfig(struct ieee80211_local *local) | |
1445 | { | |
1446 | struct ieee80211_hw *hw = &local->hw; | |
1447 | struct ieee80211_sub_if_data *sdata; | |
1448 | struct ieee80211_chanctx *ctx; | |
1449 | struct sta_info *sta; | |
1450 | int res, i; | |
1451 | bool reconfig_due_to_wowlan = false; | |
1452 | ||
1453 | #ifdef CONFIG_PM | |
1454 | if (local->suspended) | |
1455 | local->resuming = true; | |
1456 | ||
1457 | if (local->wowlan) { | |
1458 | local->wowlan = false; | |
1459 | res = drv_resume(local); | |
1460 | if (res < 0) { | |
1461 | local->resuming = false; | |
1462 | return res; | |
1463 | } | |
1464 | if (res == 0) | |
1465 | goto wake_up; | |
1466 | WARN_ON(res > 1); | |
1467 | /* | |
1468 | * res is 1, which means the driver requested | |
1469 | * to go through a regular reset on wakeup. | |
1470 | */ | |
1471 | reconfig_due_to_wowlan = true; | |
1472 | } | |
1473 | #endif | |
1474 | /* everything else happens only if HW was up & running */ | |
1475 | if (!local->open_count) | |
1476 | goto wake_up; | |
1477 | ||
1478 | /* | |
1479 | * Upon resume hardware can sometimes be goofy due to | |
1480 | * various platform / driver / bus issues, so restarting | |
1481 | * the device may at times not work immediately. Propagate | |
1482 | * the error. | |
1483 | */ | |
1484 | res = drv_start(local); | |
1485 | if (res) { | |
1486 | WARN(local->suspended, "Hardware became unavailable " | |
1487 | "upon resume. This could be a software issue " | |
1488 | "prior to suspend or a hardware issue.\n"); | |
1489 | return res; | |
1490 | } | |
1491 | ||
1492 | /* setup fragmentation threshold */ | |
1493 | drv_set_frag_threshold(local, hw->wiphy->frag_threshold); | |
1494 | ||
1495 | /* setup RTS threshold */ | |
1496 | drv_set_rts_threshold(local, hw->wiphy->rts_threshold); | |
1497 | ||
1498 | /* reset coverage class */ | |
1499 | drv_set_coverage_class(local, hw->wiphy->coverage_class); | |
1500 | ||
1501 | ieee80211_led_radio(local, true); | |
1502 | ieee80211_mod_tpt_led_trig(local, | |
1503 | IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); | |
1504 | ||
1505 | /* add interfaces */ | |
1506 | sdata = rtnl_dereference(local->monitor_sdata); | |
1507 | if (sdata) { | |
1508 | /* in HW restart it exists already */ | |
1509 | WARN_ON(local->resuming); | |
1510 | res = drv_add_interface(local, sdata); | |
1511 | if (WARN_ON(res)) { | |
1512 | rcu_assign_pointer(local->monitor_sdata, NULL); | |
1513 | synchronize_net(); | |
1514 | kfree(sdata); | |
1515 | } | |
1516 | } | |
1517 | ||
1518 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1519 | if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
1520 | sdata->vif.type != NL80211_IFTYPE_MONITOR && | |
1521 | ieee80211_sdata_running(sdata)) | |
1522 | res = drv_add_interface(local, sdata); | |
1523 | } | |
1524 | ||
1525 | /* add channel contexts */ | |
1526 | if (local->use_chanctx) { | |
1527 | mutex_lock(&local->chanctx_mtx); | |
1528 | list_for_each_entry(ctx, &local->chanctx_list, list) | |
1529 | WARN_ON(drv_add_chanctx(local, ctx)); | |
1530 | mutex_unlock(&local->chanctx_mtx); | |
1531 | } | |
1532 | ||
1533 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1534 | if (!ieee80211_sdata_running(sdata)) | |
1535 | continue; | |
1536 | ieee80211_assign_chanctx(local, sdata); | |
1537 | } | |
1538 | ||
1539 | sdata = rtnl_dereference(local->monitor_sdata); | |
1540 | if (sdata && ieee80211_sdata_running(sdata)) | |
1541 | ieee80211_assign_chanctx(local, sdata); | |
1542 | ||
1543 | /* add STAs back */ | |
1544 | mutex_lock(&local->sta_mtx); | |
1545 | list_for_each_entry(sta, &local->sta_list, list) { | |
1546 | enum ieee80211_sta_state state; | |
1547 | ||
1548 | if (!sta->uploaded) | |
1549 | continue; | |
1550 | ||
1551 | /* AP-mode stations will be added later */ | |
1552 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP) | |
1553 | continue; | |
1554 | ||
1555 | for (state = IEEE80211_STA_NOTEXIST; | |
1556 | state < sta->sta_state; state++) | |
1557 | WARN_ON(drv_sta_state(local, sta->sdata, sta, state, | |
1558 | state + 1)); | |
1559 | } | |
1560 | mutex_unlock(&local->sta_mtx); | |
1561 | ||
1562 | /* reconfigure tx conf */ | |
1563 | if (hw->queues >= IEEE80211_NUM_ACS) { | |
1564 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1565 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN || | |
1566 | sdata->vif.type == NL80211_IFTYPE_MONITOR || | |
1567 | !ieee80211_sdata_running(sdata)) | |
1568 | continue; | |
1569 | ||
1570 | for (i = 0; i < IEEE80211_NUM_ACS; i++) | |
1571 | drv_conf_tx(local, sdata, i, | |
1572 | &sdata->tx_conf[i]); | |
1573 | } | |
1574 | } | |
1575 | ||
1576 | /* reconfigure hardware */ | |
1577 | ieee80211_hw_config(local, ~0); | |
1578 | ||
1579 | ieee80211_configure_filter(local); | |
1580 | ||
1581 | /* Finally also reconfigure all the BSS information */ | |
1582 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1583 | u32 changed; | |
1584 | ||
1585 | if (!ieee80211_sdata_running(sdata)) | |
1586 | continue; | |
1587 | ||
1588 | /* common change flags for all interface types */ | |
1589 | changed = BSS_CHANGED_ERP_CTS_PROT | | |
1590 | BSS_CHANGED_ERP_PREAMBLE | | |
1591 | BSS_CHANGED_ERP_SLOT | | |
1592 | BSS_CHANGED_HT | | |
1593 | BSS_CHANGED_BASIC_RATES | | |
1594 | BSS_CHANGED_BEACON_INT | | |
1595 | BSS_CHANGED_BSSID | | |
1596 | BSS_CHANGED_CQM | | |
1597 | BSS_CHANGED_QOS | | |
1598 | BSS_CHANGED_IDLE | | |
1599 | BSS_CHANGED_TXPOWER; | |
1600 | ||
1601 | switch (sdata->vif.type) { | |
1602 | case NL80211_IFTYPE_STATION: | |
1603 | changed |= BSS_CHANGED_ASSOC | | |
1604 | BSS_CHANGED_ARP_FILTER | | |
1605 | BSS_CHANGED_PS; | |
1606 | ||
1607 | if (sdata->u.mgd.dtim_period) | |
1608 | changed |= BSS_CHANGED_DTIM_PERIOD; | |
1609 | ||
1610 | mutex_lock(&sdata->u.mgd.mtx); | |
1611 | ieee80211_bss_info_change_notify(sdata, changed); | |
1612 | mutex_unlock(&sdata->u.mgd.mtx); | |
1613 | break; | |
1614 | case NL80211_IFTYPE_ADHOC: | |
1615 | changed |= BSS_CHANGED_IBSS; | |
1616 | /* fall through */ | |
1617 | case NL80211_IFTYPE_AP: | |
1618 | changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS; | |
1619 | ||
1620 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
1621 | changed |= BSS_CHANGED_AP_PROBE_RESP; | |
1622 | ||
1623 | if (rcu_access_pointer(sdata->u.ap.beacon)) | |
1624 | drv_start_ap(local, sdata); | |
1625 | } | |
1626 | ||
1627 | /* fall through */ | |
1628 | case NL80211_IFTYPE_MESH_POINT: | |
1629 | if (sdata->vif.bss_conf.enable_beacon) { | |
1630 | changed |= BSS_CHANGED_BEACON | | |
1631 | BSS_CHANGED_BEACON_ENABLED; | |
1632 | ieee80211_bss_info_change_notify(sdata, changed); | |
1633 | } | |
1634 | break; | |
1635 | case NL80211_IFTYPE_WDS: | |
1636 | break; | |
1637 | case NL80211_IFTYPE_AP_VLAN: | |
1638 | case NL80211_IFTYPE_MONITOR: | |
1639 | /* ignore virtual */ | |
1640 | break; | |
1641 | case NL80211_IFTYPE_P2P_DEVICE: | |
1642 | changed = BSS_CHANGED_IDLE; | |
1643 | break; | |
1644 | case NL80211_IFTYPE_UNSPECIFIED: | |
1645 | case NUM_NL80211_IFTYPES: | |
1646 | case NL80211_IFTYPE_P2P_CLIENT: | |
1647 | case NL80211_IFTYPE_P2P_GO: | |
1648 | WARN_ON(1); | |
1649 | break; | |
1650 | } | |
1651 | } | |
1652 | ||
1653 | ieee80211_recalc_ps(local, -1); | |
1654 | ||
1655 | /* | |
1656 | * The sta might be in psm against the ap (e.g. because | |
1657 | * this was the state before a hw restart), so we | |
1658 | * explicitly send a null packet in order to make sure | |
1659 | * it'll sync against the ap (and get out of psm). | |
1660 | */ | |
1661 | if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { | |
1662 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1663 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
1664 | continue; | |
1665 | if (!sdata->u.mgd.associated) | |
1666 | continue; | |
1667 | ||
1668 | ieee80211_send_nullfunc(local, sdata, 0); | |
1669 | } | |
1670 | } | |
1671 | ||
1672 | /* APs are now beaconing, add back stations */ | |
1673 | mutex_lock(&local->sta_mtx); | |
1674 | list_for_each_entry(sta, &local->sta_list, list) { | |
1675 | enum ieee80211_sta_state state; | |
1676 | ||
1677 | if (!sta->uploaded) | |
1678 | continue; | |
1679 | ||
1680 | if (sta->sdata->vif.type != NL80211_IFTYPE_AP) | |
1681 | continue; | |
1682 | ||
1683 | for (state = IEEE80211_STA_NOTEXIST; | |
1684 | state < sta->sta_state; state++) | |
1685 | WARN_ON(drv_sta_state(local, sta->sdata, sta, state, | |
1686 | state + 1)); | |
1687 | } | |
1688 | mutex_unlock(&local->sta_mtx); | |
1689 | ||
1690 | /* add back keys */ | |
1691 | list_for_each_entry(sdata, &local->interfaces, list) | |
1692 | if (ieee80211_sdata_running(sdata)) | |
1693 | ieee80211_enable_keys(sdata); | |
1694 | ||
1695 | wake_up: | |
1696 | local->in_reconfig = false; | |
1697 | barrier(); | |
1698 | ||
1699 | if (local->monitors == local->open_count && local->monitors > 0) | |
1700 | ieee80211_add_virtual_monitor(local); | |
1701 | ||
1702 | /* | |
1703 | * Clear the WLAN_STA_BLOCK_BA flag so new aggregation | |
1704 | * sessions can be established after a resume. | |
1705 | * | |
1706 | * Also tear down aggregation sessions since reconfiguring | |
1707 | * them in a hardware restart scenario is not easily done | |
1708 | * right now, and the hardware will have lost information | |
1709 | * about the sessions, but we and the AP still think they | |
1710 | * are active. This is really a workaround though. | |
1711 | */ | |
1712 | if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { | |
1713 | mutex_lock(&local->sta_mtx); | |
1714 | ||
1715 | list_for_each_entry(sta, &local->sta_list, list) { | |
1716 | ieee80211_sta_tear_down_BA_sessions( | |
1717 | sta, AGG_STOP_LOCAL_REQUEST); | |
1718 | clear_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
1719 | } | |
1720 | ||
1721 | mutex_unlock(&local->sta_mtx); | |
1722 | } | |
1723 | ||
1724 | ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, | |
1725 | IEEE80211_QUEUE_STOP_REASON_SUSPEND); | |
1726 | ||
1727 | /* | |
1728 | * If this is for hw restart things are still running. | |
1729 | * We may want to change that later, however. | |
1730 | */ | |
1731 | if (!local->suspended || reconfig_due_to_wowlan) | |
1732 | drv_restart_complete(local); | |
1733 | ||
1734 | if (!local->suspended) | |
1735 | return 0; | |
1736 | ||
1737 | #ifdef CONFIG_PM | |
1738 | /* first set suspended false, then resuming */ | |
1739 | local->suspended = false; | |
1740 | mb(); | |
1741 | local->resuming = false; | |
1742 | ||
1743 | mod_timer(&local->sta_cleanup, jiffies + 1); | |
1744 | #else | |
1745 | WARN_ON(1); | |
1746 | #endif | |
1747 | return 0; | |
1748 | } | |
1749 | ||
1750 | void ieee80211_resume_disconnect(struct ieee80211_vif *vif) | |
1751 | { | |
1752 | struct ieee80211_sub_if_data *sdata; | |
1753 | struct ieee80211_local *local; | |
1754 | struct ieee80211_key *key; | |
1755 | ||
1756 | if (WARN_ON(!vif)) | |
1757 | return; | |
1758 | ||
1759 | sdata = vif_to_sdata(vif); | |
1760 | local = sdata->local; | |
1761 | ||
1762 | if (WARN_ON(!local->resuming)) | |
1763 | return; | |
1764 | ||
1765 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
1766 | return; | |
1767 | ||
1768 | sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME; | |
1769 | ||
1770 | mutex_lock(&local->key_mtx); | |
1771 | list_for_each_entry(key, &sdata->key_list, list) | |
1772 | key->flags |= KEY_FLAG_TAINTED; | |
1773 | mutex_unlock(&local->key_mtx); | |
1774 | } | |
1775 | EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); | |
1776 | ||
1777 | void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata) | |
1778 | { | |
1779 | struct ieee80211_local *local = sdata->local; | |
1780 | struct ieee80211_chanctx_conf *chanctx_conf; | |
1781 | struct ieee80211_chanctx *chanctx; | |
1782 | ||
1783 | mutex_lock(&local->chanctx_mtx); | |
1784 | ||
1785 | chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
1786 | lockdep_is_held(&local->chanctx_mtx)); | |
1787 | ||
1788 | if (WARN_ON_ONCE(!chanctx_conf)) | |
1789 | goto unlock; | |
1790 | ||
1791 | chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); | |
1792 | ieee80211_recalc_smps_chanctx(local, chanctx); | |
1793 | unlock: | |
1794 | mutex_unlock(&local->chanctx_mtx); | |
1795 | } | |
1796 | ||
1797 | static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id) | |
1798 | { | |
1799 | int i; | |
1800 | ||
1801 | for (i = 0; i < n_ids; i++) | |
1802 | if (ids[i] == id) | |
1803 | return true; | |
1804 | return false; | |
1805 | } | |
1806 | ||
1807 | /** | |
1808 | * ieee80211_ie_split - split an IE buffer according to ordering | |
1809 | * | |
1810 | * @ies: the IE buffer | |
1811 | * @ielen: the length of the IE buffer | |
1812 | * @ids: an array with element IDs that are allowed before | |
1813 | * the split | |
1814 | * @n_ids: the size of the element ID array | |
1815 | * @offset: offset where to start splitting in the buffer | |
1816 | * | |
1817 | * This function splits an IE buffer by updating the @offset | |
1818 | * variable to point to the location where the buffer should be | |
1819 | * split. | |
1820 | * | |
1821 | * It assumes that the given IE buffer is well-formed, this | |
1822 | * has to be guaranteed by the caller! | |
1823 | * | |
1824 | * It also assumes that the IEs in the buffer are ordered | |
1825 | * correctly, if not the result of using this function will not | |
1826 | * be ordered correctly either, i.e. it does no reordering. | |
1827 | * | |
1828 | * The function returns the offset where the next part of the | |
1829 | * buffer starts, which may be @ielen if the entire (remainder) | |
1830 | * of the buffer should be used. | |
1831 | */ | |
1832 | size_t ieee80211_ie_split(const u8 *ies, size_t ielen, | |
1833 | const u8 *ids, int n_ids, size_t offset) | |
1834 | { | |
1835 | size_t pos = offset; | |
1836 | ||
1837 | while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) | |
1838 | pos += 2 + ies[pos + 1]; | |
1839 | ||
1840 | return pos; | |
1841 | } | |
1842 | ||
1843 | size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) | |
1844 | { | |
1845 | size_t pos = offset; | |
1846 | ||
1847 | while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) | |
1848 | pos += 2 + ies[pos + 1]; | |
1849 | ||
1850 | return pos; | |
1851 | } | |
1852 | ||
1853 | static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, | |
1854 | int rssi_min_thold, | |
1855 | int rssi_max_thold) | |
1856 | { | |
1857 | trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); | |
1858 | ||
1859 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
1860 | return; | |
1861 | ||
1862 | /* | |
1863 | * Scale up threshold values before storing it, as the RSSI averaging | |
1864 | * algorithm uses a scaled up value as well. Change this scaling | |
1865 | * factor if the RSSI averaging algorithm changes. | |
1866 | */ | |
1867 | sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; | |
1868 | sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; | |
1869 | } | |
1870 | ||
1871 | void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, | |
1872 | int rssi_min_thold, | |
1873 | int rssi_max_thold) | |
1874 | { | |
1875 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1876 | ||
1877 | WARN_ON(rssi_min_thold == rssi_max_thold || | |
1878 | rssi_min_thold > rssi_max_thold); | |
1879 | ||
1880 | _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, | |
1881 | rssi_max_thold); | |
1882 | } | |
1883 | EXPORT_SYMBOL(ieee80211_enable_rssi_reports); | |
1884 | ||
1885 | void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) | |
1886 | { | |
1887 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1888 | ||
1889 | _ieee80211_enable_rssi_reports(sdata, 0, 0); | |
1890 | } | |
1891 | EXPORT_SYMBOL(ieee80211_disable_rssi_reports); | |
1892 | ||
1893 | u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, | |
1894 | u16 cap) | |
1895 | { | |
1896 | __le16 tmp; | |
1897 | ||
1898 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
1899 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
1900 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
1901 | ||
1902 | /* capability flags */ | |
1903 | tmp = cpu_to_le16(cap); | |
1904 | memcpy(pos, &tmp, sizeof(u16)); | |
1905 | pos += sizeof(u16); | |
1906 | ||
1907 | /* AMPDU parameters */ | |
1908 | *pos++ = ht_cap->ampdu_factor | | |
1909 | (ht_cap->ampdu_density << | |
1910 | IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); | |
1911 | ||
1912 | /* MCS set */ | |
1913 | memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); | |
1914 | pos += sizeof(ht_cap->mcs); | |
1915 | ||
1916 | /* extended capabilities */ | |
1917 | pos += sizeof(__le16); | |
1918 | ||
1919 | /* BF capabilities */ | |
1920 | pos += sizeof(__le32); | |
1921 | ||
1922 | /* antenna selection */ | |
1923 | pos += sizeof(u8); | |
1924 | ||
1925 | return pos; | |
1926 | } | |
1927 | ||
1928 | u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, | |
1929 | u32 cap) | |
1930 | { | |
1931 | __le32 tmp; | |
1932 | ||
1933 | *pos++ = WLAN_EID_VHT_CAPABILITY; | |
1934 | *pos++ = sizeof(struct ieee80211_vht_cap); | |
1935 | memset(pos, 0, sizeof(struct ieee80211_vht_cap)); | |
1936 | ||
1937 | /* capability flags */ | |
1938 | tmp = cpu_to_le32(cap); | |
1939 | memcpy(pos, &tmp, sizeof(u32)); | |
1940 | pos += sizeof(u32); | |
1941 | ||
1942 | /* VHT MCS set */ | |
1943 | memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs)); | |
1944 | pos += sizeof(vht_cap->vht_mcs); | |
1945 | ||
1946 | return pos; | |
1947 | } | |
1948 | ||
1949 | u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, | |
1950 | const struct cfg80211_chan_def *chandef, | |
1951 | u16 prot_mode) | |
1952 | { | |
1953 | struct ieee80211_ht_operation *ht_oper; | |
1954 | /* Build HT Information */ | |
1955 | *pos++ = WLAN_EID_HT_OPERATION; | |
1956 | *pos++ = sizeof(struct ieee80211_ht_operation); | |
1957 | ht_oper = (struct ieee80211_ht_operation *)pos; | |
1958 | ht_oper->primary_chan = ieee80211_frequency_to_channel( | |
1959 | chandef->chan->center_freq); | |
1960 | switch (chandef->width) { | |
1961 | case NL80211_CHAN_WIDTH_160: | |
1962 | case NL80211_CHAN_WIDTH_80P80: | |
1963 | case NL80211_CHAN_WIDTH_80: | |
1964 | case NL80211_CHAN_WIDTH_40: | |
1965 | if (chandef->center_freq1 > chandef->chan->center_freq) | |
1966 | ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; | |
1967 | else | |
1968 | ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; | |
1969 | break; | |
1970 | default: | |
1971 | ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; | |
1972 | break; | |
1973 | } | |
1974 | if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && | |
1975 | chandef->width != NL80211_CHAN_WIDTH_20_NOHT && | |
1976 | chandef->width != NL80211_CHAN_WIDTH_20) | |
1977 | ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; | |
1978 | ||
1979 | ht_oper->operation_mode = cpu_to_le16(prot_mode); | |
1980 | ht_oper->stbc_param = 0x0000; | |
1981 | ||
1982 | /* It seems that Basic MCS set and Supported MCS set | |
1983 | are identical for the first 10 bytes */ | |
1984 | memset(&ht_oper->basic_set, 0, 16); | |
1985 | memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10); | |
1986 | ||
1987 | return pos + sizeof(struct ieee80211_ht_operation); | |
1988 | } | |
1989 | ||
1990 | void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan, | |
1991 | const struct ieee80211_ht_operation *ht_oper, | |
1992 | struct cfg80211_chan_def *chandef) | |
1993 | { | |
1994 | enum nl80211_channel_type channel_type; | |
1995 | ||
1996 | if (!ht_oper) { | |
1997 | cfg80211_chandef_create(chandef, control_chan, | |
1998 | NL80211_CHAN_NO_HT); | |
1999 | return; | |
2000 | } | |
2001 | ||
2002 | switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { | |
2003 | case IEEE80211_HT_PARAM_CHA_SEC_NONE: | |
2004 | channel_type = NL80211_CHAN_HT20; | |
2005 | break; | |
2006 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
2007 | channel_type = NL80211_CHAN_HT40PLUS; | |
2008 | break; | |
2009 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
2010 | channel_type = NL80211_CHAN_HT40MINUS; | |
2011 | break; | |
2012 | default: | |
2013 | channel_type = NL80211_CHAN_NO_HT; | |
2014 | } | |
2015 | ||
2016 | cfg80211_chandef_create(chandef, control_chan, channel_type); | |
2017 | } | |
2018 | ||
2019 | int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata, | |
2020 | struct sk_buff *skb, bool need_basic, | |
2021 | enum ieee80211_band band) | |
2022 | { | |
2023 | struct ieee80211_local *local = sdata->local; | |
2024 | struct ieee80211_supported_band *sband; | |
2025 | int rate; | |
2026 | u8 i, rates, *pos; | |
2027 | u32 basic_rates = sdata->vif.bss_conf.basic_rates; | |
2028 | ||
2029 | sband = local->hw.wiphy->bands[band]; | |
2030 | rates = sband->n_bitrates; | |
2031 | if (rates > 8) | |
2032 | rates = 8; | |
2033 | ||
2034 | if (skb_tailroom(skb) < rates + 2) | |
2035 | return -ENOMEM; | |
2036 | ||
2037 | pos = skb_put(skb, rates + 2); | |
2038 | *pos++ = WLAN_EID_SUPP_RATES; | |
2039 | *pos++ = rates; | |
2040 | for (i = 0; i < rates; i++) { | |
2041 | u8 basic = 0; | |
2042 | if (need_basic && basic_rates & BIT(i)) | |
2043 | basic = 0x80; | |
2044 | rate = sband->bitrates[i].bitrate; | |
2045 | *pos++ = basic | (u8) (rate / 5); | |
2046 | } | |
2047 | ||
2048 | return 0; | |
2049 | } | |
2050 | ||
2051 | int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata, | |
2052 | struct sk_buff *skb, bool need_basic, | |
2053 | enum ieee80211_band band) | |
2054 | { | |
2055 | struct ieee80211_local *local = sdata->local; | |
2056 | struct ieee80211_supported_band *sband; | |
2057 | int rate; | |
2058 | u8 i, exrates, *pos; | |
2059 | u32 basic_rates = sdata->vif.bss_conf.basic_rates; | |
2060 | ||
2061 | sband = local->hw.wiphy->bands[band]; | |
2062 | exrates = sband->n_bitrates; | |
2063 | if (exrates > 8) | |
2064 | exrates -= 8; | |
2065 | else | |
2066 | exrates = 0; | |
2067 | ||
2068 | if (skb_tailroom(skb) < exrates + 2) | |
2069 | return -ENOMEM; | |
2070 | ||
2071 | if (exrates) { | |
2072 | pos = skb_put(skb, exrates + 2); | |
2073 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
2074 | *pos++ = exrates; | |
2075 | for (i = 8; i < sband->n_bitrates; i++) { | |
2076 | u8 basic = 0; | |
2077 | if (need_basic && basic_rates & BIT(i)) | |
2078 | basic = 0x80; | |
2079 | rate = sband->bitrates[i].bitrate; | |
2080 | *pos++ = basic | (u8) (rate / 5); | |
2081 | } | |
2082 | } | |
2083 | return 0; | |
2084 | } | |
2085 | ||
2086 | int ieee80211_ave_rssi(struct ieee80211_vif *vif) | |
2087 | { | |
2088 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
2089 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2090 | ||
2091 | if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) { | |
2092 | /* non-managed type inferfaces */ | |
2093 | return 0; | |
2094 | } | |
2095 | return ifmgd->ave_beacon_signal / 16; | |
2096 | } | |
2097 | EXPORT_SYMBOL_GPL(ieee80211_ave_rssi); | |
2098 | ||
2099 | u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs) | |
2100 | { | |
2101 | if (!mcs) | |
2102 | return 1; | |
2103 | ||
2104 | /* TODO: consider rx_highest */ | |
2105 | ||
2106 | if (mcs->rx_mask[3]) | |
2107 | return 4; | |
2108 | if (mcs->rx_mask[2]) | |
2109 | return 3; | |
2110 | if (mcs->rx_mask[1]) | |
2111 | return 2; | |
2112 | return 1; | |
2113 | } | |
2114 | ||
2115 | /** | |
2116 | * ieee80211_calculate_rx_timestamp - calculate timestamp in frame | |
2117 | * @local: mac80211 hw info struct | |
2118 | * @status: RX status | |
2119 | * @mpdu_len: total MPDU length (including FCS) | |
2120 | * @mpdu_offset: offset into MPDU to calculate timestamp at | |
2121 | * | |
2122 | * This function calculates the RX timestamp at the given MPDU offset, taking | |
2123 | * into account what the RX timestamp was. An offset of 0 will just normalize | |
2124 | * the timestamp to TSF at beginning of MPDU reception. | |
2125 | */ | |
2126 | u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local, | |
2127 | struct ieee80211_rx_status *status, | |
2128 | unsigned int mpdu_len, | |
2129 | unsigned int mpdu_offset) | |
2130 | { | |
2131 | u64 ts = status->mactime; | |
2132 | struct rate_info ri; | |
2133 | u16 rate; | |
2134 | ||
2135 | if (WARN_ON(!ieee80211_have_rx_timestamp(status))) | |
2136 | return 0; | |
2137 | ||
2138 | memset(&ri, 0, sizeof(ri)); | |
2139 | ||
2140 | /* Fill cfg80211 rate info */ | |
2141 | if (status->flag & RX_FLAG_HT) { | |
2142 | ri.mcs = status->rate_idx; | |
2143 | ri.flags |= RATE_INFO_FLAGS_MCS; | |
2144 | if (status->flag & RX_FLAG_40MHZ) | |
2145 | ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH; | |
2146 | if (status->flag & RX_FLAG_SHORT_GI) | |
2147 | ri.flags |= RATE_INFO_FLAGS_SHORT_GI; | |
2148 | } else if (status->flag & RX_FLAG_VHT) { | |
2149 | ri.flags |= RATE_INFO_FLAGS_VHT_MCS; | |
2150 | ri.mcs = status->rate_idx; | |
2151 | ri.nss = status->vht_nss; | |
2152 | if (status->flag & RX_FLAG_40MHZ) | |
2153 | ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH; | |
2154 | if (status->flag & RX_FLAG_80MHZ) | |
2155 | ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH; | |
2156 | if (status->flag & RX_FLAG_80P80MHZ) | |
2157 | ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH; | |
2158 | if (status->flag & RX_FLAG_160MHZ) | |
2159 | ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH; | |
2160 | if (status->flag & RX_FLAG_SHORT_GI) | |
2161 | ri.flags |= RATE_INFO_FLAGS_SHORT_GI; | |
2162 | } else { | |
2163 | struct ieee80211_supported_band *sband; | |
2164 | ||
2165 | sband = local->hw.wiphy->bands[status->band]; | |
2166 | ri.legacy = sband->bitrates[status->rate_idx].bitrate; | |
2167 | } | |
2168 | ||
2169 | rate = cfg80211_calculate_bitrate(&ri); | |
2170 | ||
2171 | /* rewind from end of MPDU */ | |
2172 | if (status->flag & RX_FLAG_MACTIME_END) | |
2173 | ts -= mpdu_len * 8 * 10 / rate; | |
2174 | ||
2175 | ts += mpdu_offset * 8 * 10 / rate; | |
2176 | ||
2177 | return ts; | |
2178 | } | |
2179 | ||
2180 | void ieee80211_dfs_cac_cancel(struct ieee80211_local *local) | |
2181 | { | |
2182 | struct ieee80211_sub_if_data *sdata; | |
2183 | ||
2184 | mutex_lock(&local->iflist_mtx); | |
2185 | list_for_each_entry(sdata, &local->interfaces, list) { | |
2186 | cancel_delayed_work_sync(&sdata->dfs_cac_timer_work); | |
2187 | ||
2188 | if (sdata->wdev.cac_started) { | |
2189 | ieee80211_vif_release_channel(sdata); | |
2190 | cfg80211_cac_event(sdata->dev, | |
2191 | NL80211_RADAR_CAC_ABORTED, | |
2192 | GFP_KERNEL); | |
2193 | } | |
2194 | } | |
2195 | mutex_unlock(&local->iflist_mtx); | |
2196 | } | |
2197 | ||
2198 | void ieee80211_dfs_radar_detected_work(struct work_struct *work) | |
2199 | { | |
2200 | struct ieee80211_local *local = | |
2201 | container_of(work, struct ieee80211_local, radar_detected_work); | |
2202 | struct cfg80211_chan_def chandef; | |
2203 | ||
2204 | ieee80211_dfs_cac_cancel(local); | |
2205 | ||
2206 | if (local->use_chanctx) | |
2207 | /* currently not handled */ | |
2208 | WARN_ON(1); | |
2209 | else { | |
2210 | chandef = local->hw.conf.chandef; | |
2211 | cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL); | |
2212 | } | |
2213 | } | |
2214 | ||
2215 | void ieee80211_radar_detected(struct ieee80211_hw *hw) | |
2216 | { | |
2217 | struct ieee80211_local *local = hw_to_local(hw); | |
2218 | ||
2219 | trace_api_radar_detected(local); | |
2220 | ||
2221 | ieee80211_queue_work(hw, &local->radar_detected_work); | |
2222 | } | |
2223 | EXPORT_SYMBOL(ieee80211_radar_detected); |