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ARM: dma-api: fix max_pfn off-by-one error in __dma_supported()
[linux/fpc-iii.git] / net / mac80211 / mlme.c
blob5fa13176036f4f3d9d9edeff6a903580597e11f0
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * BSS client mode implementation
4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
5 * Copyright 2004, Instant802 Networks, Inc.
6 * Copyright 2005, Devicescape Software, Inc.
7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * Copyright 2013-2014 Intel Mobile Communications GmbH
10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
11 * Copyright (C) 2018 - 2019 Intel Corporation
12 */
13
14 #include <linux/delay.h>
15 #include <linux/fips.h>
16 #include <linux/if_ether.h>
17 #include <linux/skbuff.h>
18 #include <linux/if_arp.h>
19 #include <linux/etherdevice.h>
20 #include <linux/moduleparam.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
27
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
30 #include "rate.h"
31 #include "led.h"
32 #include "fils_aead.h"
33
34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
37 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2)
38 #define IEEE80211_AUTH_MAX_TRIES 3
39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
41 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
42 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
43 #define IEEE80211_ASSOC_MAX_TRIES 3
44
45 static int max_nullfunc_tries = 2;
46 module_param(max_nullfunc_tries, int, 0644);
47 MODULE_PARM_DESC(max_nullfunc_tries,
48 "Maximum nullfunc tx tries before disconnecting (reason 4).");
49
50 static int max_probe_tries = 5;
51 module_param(max_probe_tries, int, 0644);
52 MODULE_PARM_DESC(max_probe_tries,
53 "Maximum probe tries before disconnecting (reason 4).");
54
55 /*
56 * Beacon loss timeout is calculated as N frames times the
57 * advertised beacon interval. This may need to be somewhat
58 * higher than what hardware might detect to account for
59 * delays in the host processing frames. But since we also
60 * probe on beacon miss before declaring the connection lost
61 * default to what we want.
62 */
63 static int beacon_loss_count = 7;
64 module_param(beacon_loss_count, int, 0644);
65 MODULE_PARM_DESC(beacon_loss_count,
66 "Number of beacon intervals before we decide beacon was lost.");
67
68 /*
69 * Time the connection can be idle before we probe
70 * it to see if we can still talk to the AP.
71 */
72 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
73 /*
74 * Time we wait for a probe response after sending
75 * a probe request because of beacon loss or for
76 * checking the connection still works.
77 */
78 static int probe_wait_ms = 500;
79 module_param(probe_wait_ms, int, 0644);
80 MODULE_PARM_DESC(probe_wait_ms,
81 "Maximum time(ms) to wait for probe response"
82 " before disconnecting (reason 4).");
83
84 /*
85 * How many Beacon frames need to have been used in average signal strength
86 * before starting to indicate signal change events.
87 */
88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
89
90 /*
91 * We can have multiple work items (and connection probing)
92 * scheduling this timer, but we need to take care to only
93 * reschedule it when it should fire _earlier_ than it was
94 * asked for before, or if it's not pending right now. This
95 * function ensures that. Note that it then is required to
96 * run this function for all timeouts after the first one
97 * has happened -- the work that runs from this timer will
98 * do that.
99 */
100 static void run_again(struct ieee80211_sub_if_data *sdata,
101 unsigned long timeout)
102 {
103 sdata_assert_lock(sdata);
104
105 if (!timer_pending(&sdata->u.mgd.timer) ||
106 time_before(timeout, sdata->u.mgd.timer.expires))
107 mod_timer(&sdata->u.mgd.timer, timeout);
108 }
109
110 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
111 {
112 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
113 return;
114
115 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
116 return;
117
118 mod_timer(&sdata->u.mgd.bcn_mon_timer,
119 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
120 }
121
122 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
123 {
124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
125
126 if (unlikely(!ifmgd->associated))
127 return;
128
129 if (ifmgd->probe_send_count)
130 ifmgd->probe_send_count = 0;
131
132 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
133 return;
134
135 mod_timer(&ifmgd->conn_mon_timer,
136 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
137 }
138
139 static int ecw2cw(int ecw)
140 {
141 return (1 << ecw) - 1;
142 }
143
144 static u32
145 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
146 struct ieee80211_supported_band *sband,
147 struct ieee80211_channel *channel,
148 const struct ieee80211_ht_operation *ht_oper,
149 const struct ieee80211_vht_operation *vht_oper,
150 const struct ieee80211_he_operation *he_oper,
151 struct cfg80211_chan_def *chandef, bool tracking)
152 {
153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
154 struct cfg80211_chan_def vht_chandef;
155 struct ieee80211_sta_ht_cap sta_ht_cap;
156 u32 ht_cfreq, ret;
157
158 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
159 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
160
161 memset(chandef, 0, sizeof(struct cfg80211_chan_def));
162 chandef->chan = channel;
163 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
164 chandef->center_freq1 = channel->center_freq;
165
166 if (!ht_oper || !sta_ht_cap.ht_supported) {
167 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
168 goto out;
169 }
170
171 chandef->width = NL80211_CHAN_WIDTH_20;
172
173 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
174 channel->band);
175 /* check that channel matches the right operating channel */
176 if (!tracking && channel->center_freq != ht_cfreq) {
177 /*
178 * It's possible that some APs are confused here;
179 * Netgear WNDR3700 sometimes reports 4 higher than
180 * the actual channel in association responses, but
181 * since we look at probe response/beacon data here
182 * it should be OK.
183 */
184 sdata_info(sdata,
185 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
186 channel->center_freq, ht_cfreq,
187 ht_oper->primary_chan, channel->band);
188 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
189 goto out;
190 }
191
192 /* check 40 MHz support, if we have it */
193 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
194 ieee80211_chandef_ht_oper(ht_oper, chandef);
195 } else {
196 /* 40 MHz (and 80 MHz) must be supported for VHT */
197 ret = IEEE80211_STA_DISABLE_VHT;
198 /* also mark 40 MHz disabled */
199 ret |= IEEE80211_STA_DISABLE_40MHZ;
200 goto out;
201 }
202
203 if (!vht_oper || !sband->vht_cap.vht_supported) {
204 ret = IEEE80211_STA_DISABLE_VHT;
205 goto out;
206 }
207
208 vht_chandef = *chandef;
209 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper &&
210 (le32_to_cpu(he_oper->he_oper_params) &
211 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) {
212 struct ieee80211_vht_operation he_oper_vht_cap;
213
214 /*
215 * Set only first 3 bytes (other 2 aren't used in
216 * ieee80211_chandef_vht_oper() anyway)
217 */
218 memcpy(&he_oper_vht_cap, he_oper->optional, 3);
219 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0);
220
221 if (!ieee80211_chandef_vht_oper(&sdata->local->hw,
222 &he_oper_vht_cap, ht_oper,
223 &vht_chandef)) {
224 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
225 sdata_info(sdata,
226 "HE AP VHT information is invalid, disable HE\n");
227 ret = IEEE80211_STA_DISABLE_HE;
228 goto out;
229 }
230 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_oper,
231 ht_oper, &vht_chandef)) {
232 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
233 sdata_info(sdata,
234 "AP VHT information is invalid, disable VHT\n");
235 ret = IEEE80211_STA_DISABLE_VHT;
236 goto out;
237 }
238
239 if (!cfg80211_chandef_valid(&vht_chandef)) {
240 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
241 sdata_info(sdata,
242 "AP VHT information is invalid, disable VHT\n");
243 ret = IEEE80211_STA_DISABLE_VHT;
244 goto out;
245 }
246
247 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
248 ret = 0;
249 goto out;
250 }
251
252 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
253 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
254 sdata_info(sdata,
255 "AP VHT information doesn't match HT, disable VHT\n");
256 ret = IEEE80211_STA_DISABLE_VHT;
257 goto out;
258 }
259
260 *chandef = vht_chandef;
261
262 ret = 0;
263
264 out:
265 /*
266 * When tracking the current AP, don't do any further checks if the
267 * new chandef is identical to the one we're currently using for the
268 * connection. This keeps us from playing ping-pong with regulatory,
269 * without it the following can happen (for example):
270 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
271 * - AP advertises regdom US
272 * - CRDA loads regdom US with 80 MHz prohibited (old database)
273 * - the code below detects an unsupported channel, downgrades, and
274 * we disconnect from the AP in the caller
275 * - disconnect causes CRDA to reload world regdomain and the game
276 * starts anew.
277 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
278 *
279 * It seems possible that there are still scenarios with CSA or real
280 * bandwidth changes where a this could happen, but those cases are
281 * less common and wouldn't completely prevent using the AP.
282 */
283 if (tracking &&
284 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
285 return ret;
286
287 /* don't print the message below for VHT mismatch if VHT is disabled */
288 if (ret & IEEE80211_STA_DISABLE_VHT)
289 vht_chandef = *chandef;
290
291 /*
292 * Ignore the DISABLED flag when we're already connected and only
293 * tracking the APs beacon for bandwidth changes - otherwise we
294 * might get disconnected here if we connect to an AP, update our
295 * regulatory information based on the AP's country IE and the
296 * information we have is wrong/outdated and disables the channel
297 * that we're actually using for the connection to the AP.
298 */
299 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
300 tracking ? 0 :
301 IEEE80211_CHAN_DISABLED)) {
302 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
303 ret = IEEE80211_STA_DISABLE_HT |
304 IEEE80211_STA_DISABLE_VHT;
305 break;
306 }
307
308 ret |= ieee80211_chandef_downgrade(chandef);
309 }
310
311 if (chandef->width != vht_chandef.width && !tracking)
312 sdata_info(sdata,
313 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
314
315 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
316 return ret;
317 }
318
319 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
320 struct sta_info *sta,
321 const struct ieee80211_ht_cap *ht_cap,
322 const struct ieee80211_ht_operation *ht_oper,
323 const struct ieee80211_vht_operation *vht_oper,
324 const struct ieee80211_he_operation *he_oper,
325 const u8 *bssid, u32 *changed)
326 {
327 struct ieee80211_local *local = sdata->local;
328 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
329 struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan;
330 struct ieee80211_supported_band *sband =
331 local->hw.wiphy->bands[chan->band];
332 struct cfg80211_chan_def chandef;
333 u16 ht_opmode;
334 u32 flags;
335 enum ieee80211_sta_rx_bandwidth new_sta_bw;
336 int ret;
337
338 /* if HT was/is disabled, don't track any bandwidth changes */
339 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
340 return 0;
341
342 /* don't check VHT if we associated as non-VHT station */
343 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
344 vht_oper = NULL;
345
346 /* don't check HE if we associated as non-HE station */
347 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE ||
348 !ieee80211_get_he_sta_cap(sband))
349 he_oper = NULL;
350
351 if (WARN_ON_ONCE(!sta))
352 return -EINVAL;
353
354 /*
355 * if bss configuration changed store the new one -
356 * this may be applicable even if channel is identical
357 */
358 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
359 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
360 *changed |= BSS_CHANGED_HT;
361 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
362 }
363
364 /* calculate new channel (type) based on HT/VHT/HE operation IEs */
365 flags = ieee80211_determine_chantype(sdata, sband, chan,
366 ht_oper, vht_oper, he_oper,
367 &chandef, true);
368
369 /*
370 * Downgrade the new channel if we associated with restricted
371 * capabilities. For example, if we associated as a 20 MHz STA
372 * to a 40 MHz AP (due to regulatory, capabilities or config
373 * reasons) then switching to a 40 MHz channel now won't do us
374 * any good -- we couldn't use it with the AP.
375 */
376 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
377 chandef.width == NL80211_CHAN_WIDTH_80P80)
378 flags |= ieee80211_chandef_downgrade(&chandef);
379 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
380 chandef.width == NL80211_CHAN_WIDTH_160)
381 flags |= ieee80211_chandef_downgrade(&chandef);
382 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
383 chandef.width > NL80211_CHAN_WIDTH_20)
384 flags |= ieee80211_chandef_downgrade(&chandef);
385
386 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
387 return 0;
388
389 sdata_info(sdata,
390 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
391 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
392 chandef.center_freq1, chandef.center_freq2);
393
394 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
395 IEEE80211_STA_DISABLE_VHT |
396 IEEE80211_STA_DISABLE_40MHZ |
397 IEEE80211_STA_DISABLE_80P80MHZ |
398 IEEE80211_STA_DISABLE_160MHZ)) ||
399 !cfg80211_chandef_valid(&chandef)) {
400 sdata_info(sdata,
401 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
402 ifmgd->bssid);
403 return -EINVAL;
404 }
405
406 switch (chandef.width) {
407 case NL80211_CHAN_WIDTH_20_NOHT:
408 case NL80211_CHAN_WIDTH_20:
409 new_sta_bw = IEEE80211_STA_RX_BW_20;
410 break;
411 case NL80211_CHAN_WIDTH_40:
412 new_sta_bw = IEEE80211_STA_RX_BW_40;
413 break;
414 case NL80211_CHAN_WIDTH_80:
415 new_sta_bw = IEEE80211_STA_RX_BW_80;
416 break;
417 case NL80211_CHAN_WIDTH_80P80:
418 case NL80211_CHAN_WIDTH_160:
419 new_sta_bw = IEEE80211_STA_RX_BW_160;
420 break;
421 default:
422 return -EINVAL;
423 }
424
425 if (new_sta_bw > sta->cur_max_bandwidth)
426 new_sta_bw = sta->cur_max_bandwidth;
427
428 if (new_sta_bw < sta->sta.bandwidth) {
429 sta->sta.bandwidth = new_sta_bw;
430 rate_control_rate_update(local, sband, sta,
431 IEEE80211_RC_BW_CHANGED);
432 }
433
434 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
435 if (ret) {
436 sdata_info(sdata,
437 "AP %pM changed bandwidth to incompatible one - disconnect\n",
438 ifmgd->bssid);
439 return ret;
440 }
441
442 if (new_sta_bw > sta->sta.bandwidth) {
443 sta->sta.bandwidth = new_sta_bw;
444 rate_control_rate_update(local, sband, sta,
445 IEEE80211_RC_BW_CHANGED);
446 }
447
448 return 0;
449 }
450
451 /* frame sending functions */
452
453 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
454 struct sk_buff *skb, u8 ap_ht_param,
455 struct ieee80211_supported_band *sband,
456 struct ieee80211_channel *channel,
457 enum ieee80211_smps_mode smps)
458 {
459 u8 *pos;
460 u32 flags = channel->flags;
461 u16 cap;
462 struct ieee80211_sta_ht_cap ht_cap;
463
464 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
465
466 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
467 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
468
469 /* determine capability flags */
470 cap = ht_cap.cap;
471
472 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
473 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
474 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
475 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
476 cap &= ~IEEE80211_HT_CAP_SGI_40;
477 }
478 break;
479 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
480 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
481 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
482 cap &= ~IEEE80211_HT_CAP_SGI_40;
483 }
484 break;
485 }
486
487 /*
488 * If 40 MHz was disabled associate as though we weren't
489 * capable of 40 MHz -- some broken APs will never fall
490 * back to trying to transmit in 20 MHz.
491 */
492 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
493 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
494 cap &= ~IEEE80211_HT_CAP_SGI_40;
495 }
496
497 /* set SM PS mode properly */
498 cap &= ~IEEE80211_HT_CAP_SM_PS;
499 switch (smps) {
500 case IEEE80211_SMPS_AUTOMATIC:
501 case IEEE80211_SMPS_NUM_MODES:
502 WARN_ON(1);
503 /* fall through */
504 case IEEE80211_SMPS_OFF:
505 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
506 IEEE80211_HT_CAP_SM_PS_SHIFT;
507 break;
508 case IEEE80211_SMPS_STATIC:
509 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
510 IEEE80211_HT_CAP_SM_PS_SHIFT;
511 break;
512 case IEEE80211_SMPS_DYNAMIC:
513 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
514 IEEE80211_HT_CAP_SM_PS_SHIFT;
515 break;
516 }
517
518 /* reserve and fill IE */
519 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
520 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
521 }
522
523 /* This function determines vht capability flags for the association
524 * and builds the IE.
525 * Note - the function may set the owner of the MU-MIMO capability
526 */
527 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
528 struct sk_buff *skb,
529 struct ieee80211_supported_band *sband,
530 struct ieee80211_vht_cap *ap_vht_cap)
531 {
532 struct ieee80211_local *local = sdata->local;
533 u8 *pos;
534 u32 cap;
535 struct ieee80211_sta_vht_cap vht_cap;
536 u32 mask, ap_bf_sts, our_bf_sts;
537
538 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
539
540 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
541 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
542
543 /* determine capability flags */
544 cap = vht_cap.cap;
545
546 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
547 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
548
549 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
550 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
551 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
552 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
553 }
554
555 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
556 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
557 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
558 }
559
560 /*
561 * Some APs apparently get confused if our capabilities are better
562 * than theirs, so restrict what we advertise in the assoc request.
563 */
564 if (!(ap_vht_cap->vht_cap_info &
565 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
566 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
567 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
568 else if (!(ap_vht_cap->vht_cap_info &
569 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
570 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
571
572 /*
573 * If some other vif is using the MU-MIMO capablity we cannot associate
574 * using MU-MIMO - this will lead to contradictions in the group-id
575 * mechanism.
576 * Ownership is defined since association request, in order to avoid
577 * simultaneous associations with MU-MIMO.
578 */
579 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
580 bool disable_mu_mimo = false;
581 struct ieee80211_sub_if_data *other;
582
583 list_for_each_entry_rcu(other, &local->interfaces, list) {
584 if (other->vif.mu_mimo_owner) {
585 disable_mu_mimo = true;
586 break;
587 }
588 }
589 if (disable_mu_mimo)
590 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
591 else
592 sdata->vif.mu_mimo_owner = true;
593 }
594
595 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
596
597 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
598 our_bf_sts = cap & mask;
599
600 if (ap_bf_sts < our_bf_sts) {
601 cap &= ~mask;
602 cap |= ap_bf_sts;
603 }
604
605 /* reserve and fill IE */
606 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
607 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
608 }
609
610 /* This function determines HE capability flags for the association
611 * and builds the IE.
612 */
613 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
614 struct sk_buff *skb,
615 struct ieee80211_supported_band *sband)
616 {
617 u8 *pos;
618 const struct ieee80211_sta_he_cap *he_cap = NULL;
619 u8 he_cap_size;
620
621 he_cap = ieee80211_get_he_sta_cap(sband);
622 if (!he_cap)
623 return;
624
625 /*
626 * TODO: the 1 added is because this temporarily is under the EXTENSION
627 * IE. Get rid of it when it moves.
628 */
629 he_cap_size =
630 2 + 1 + sizeof(he_cap->he_cap_elem) +
631 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) +
632 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
633 he_cap->he_cap_elem.phy_cap_info);
634 pos = skb_put(skb, he_cap_size);
635 ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size);
636 }
637
638 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
639 {
640 struct ieee80211_local *local = sdata->local;
641 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
642 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
643 struct sk_buff *skb;
644 struct ieee80211_mgmt *mgmt;
645 u8 *pos, qos_info, *ie_start;
646 size_t offset = 0, noffset;
647 int i, count, rates_len, supp_rates_len, shift;
648 u16 capab;
649 struct ieee80211_supported_band *sband;
650 struct ieee80211_chanctx_conf *chanctx_conf;
651 struct ieee80211_channel *chan;
652 u32 rates = 0;
653
654 sdata_assert_lock(sdata);
655
656 rcu_read_lock();
657 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
658 if (WARN_ON(!chanctx_conf)) {
659 rcu_read_unlock();
660 return;
661 }
662 chan = chanctx_conf->def.chan;
663 rcu_read_unlock();
664 sband = local->hw.wiphy->bands[chan->band];
665 shift = ieee80211_vif_get_shift(&sdata->vif);
666
667 if (assoc_data->supp_rates_len) {
668 /*
669 * Get all rates supported by the device and the AP as
670 * some APs don't like getting a superset of their rates
671 * in the association request (e.g. D-Link DAP 1353 in
672 * b-only mode)...
673 */
674 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
675 assoc_data->supp_rates,
676 assoc_data->supp_rates_len,
677 &rates);
678 } else {
679 /*
680 * In case AP not provide any supported rates information
681 * before association, we send information element(s) with
682 * all rates that we support.
683 */
684 rates_len = 0;
685 for (i = 0; i < sband->n_bitrates; i++) {
686 rates |= BIT(i);
687 rates_len++;
688 }
689 }
690
691 skb = alloc_skb(local->hw.extra_tx_headroom +
692 sizeof(*mgmt) + /* bit too much but doesn't matter */
693 2 + assoc_data->ssid_len + /* SSID */
694 4 + rates_len + /* (extended) rates */
695 4 + /* power capability */
696 2 + 2 * sband->n_channels + /* supported channels */
697 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
698 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
699 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */
700 sizeof(struct ieee80211_he_mcs_nss_supp) +
701 IEEE80211_HE_PPE_THRES_MAX_LEN +
702 assoc_data->ie_len + /* extra IEs */
703 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
704 9, /* WMM */
705 GFP_KERNEL);
706 if (!skb)
707 return;
708
709 skb_reserve(skb, local->hw.extra_tx_headroom);
710
711 capab = WLAN_CAPABILITY_ESS;
712
713 if (sband->band == NL80211_BAND_2GHZ) {
714 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
715 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
716 }
717
718 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
719 capab |= WLAN_CAPABILITY_PRIVACY;
720
721 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
722 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
723 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
724
725 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
726 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
727
728 mgmt = skb_put_zero(skb, 24);
729 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
730 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
731 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
732
733 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
734 skb_put(skb, 10);
735 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
736 IEEE80211_STYPE_REASSOC_REQ);
737 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
738 mgmt->u.reassoc_req.listen_interval =
739 cpu_to_le16(local->hw.conf.listen_interval);
740 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
741 ETH_ALEN);
742 } else {
743 skb_put(skb, 4);
744 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
745 IEEE80211_STYPE_ASSOC_REQ);
746 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
747 mgmt->u.assoc_req.listen_interval =
748 cpu_to_le16(local->hw.conf.listen_interval);
749 }
750
751 /* SSID */
752 pos = skb_put(skb, 2 + assoc_data->ssid_len);
753 ie_start = pos;
754 *pos++ = WLAN_EID_SSID;
755 *pos++ = assoc_data->ssid_len;
756 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
757
758 /* add all rates which were marked to be used above */
759 supp_rates_len = rates_len;
760 if (supp_rates_len > 8)
761 supp_rates_len = 8;
762
763 pos = skb_put(skb, supp_rates_len + 2);
764 *pos++ = WLAN_EID_SUPP_RATES;
765 *pos++ = supp_rates_len;
766
767 count = 0;
768 for (i = 0; i < sband->n_bitrates; i++) {
769 if (BIT(i) & rates) {
770 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
771 5 * (1 << shift));
772 *pos++ = (u8) rate;
773 if (++count == 8)
774 break;
775 }
776 }
777
778 if (rates_len > count) {
779 pos = skb_put(skb, rates_len - count + 2);
780 *pos++ = WLAN_EID_EXT_SUPP_RATES;
781 *pos++ = rates_len - count;
782
783 for (i++; i < sband->n_bitrates; i++) {
784 if (BIT(i) & rates) {
785 int rate;
786 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
787 5 * (1 << shift));
788 *pos++ = (u8) rate;
789 }
790 }
791 }
792
793 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
794 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
795 pos = skb_put(skb, 4);
796 *pos++ = WLAN_EID_PWR_CAPABILITY;
797 *pos++ = 2;
798 *pos++ = 0; /* min tx power */
799 /* max tx power */
800 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
801 }
802
803 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
804 /* TODO: get this in reg domain format */
805 pos = skb_put(skb, 2 * sband->n_channels + 2);
806 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
807 *pos++ = 2 * sband->n_channels;
808 for (i = 0; i < sband->n_channels; i++) {
809 *pos++ = ieee80211_frequency_to_channel(
810 sband->channels[i].center_freq);
811 *pos++ = 1; /* one channel in the subband*/
812 }
813 }
814
815 /* Set MBSSID support for HE AP if needed */
816 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) &&
817 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len) {
818 struct element *elem;
819
820 /* we know it's writable, cast away the const */
821 elem = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
822 assoc_data->ie,
823 assoc_data->ie_len);
824
825 /* We can probably assume both always true */
826 if (elem && elem->datalen >= 3)
827 elem->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
828 }
829
830 /* if present, add any custom IEs that go before HT */
831 if (assoc_data->ie_len) {
832 static const u8 before_ht[] = {
833 WLAN_EID_SSID,
834 WLAN_EID_SUPP_RATES,
835 WLAN_EID_EXT_SUPP_RATES,
836 WLAN_EID_PWR_CAPABILITY,
837 WLAN_EID_SUPPORTED_CHANNELS,
838 WLAN_EID_RSN,
839 WLAN_EID_QOS_CAPA,
840 WLAN_EID_RRM_ENABLED_CAPABILITIES,
841 WLAN_EID_MOBILITY_DOMAIN,
842 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
843 WLAN_EID_RIC_DATA, /* reassoc only */
844 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
845 };
846 static const u8 after_ric[] = {
847 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
848 WLAN_EID_HT_CAPABILITY,
849 WLAN_EID_BSS_COEX_2040,
850 /* luckily this is almost always there */
851 WLAN_EID_EXT_CAPABILITY,
852 WLAN_EID_QOS_TRAFFIC_CAPA,
853 WLAN_EID_TIM_BCAST_REQ,
854 WLAN_EID_INTERWORKING,
855 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
856 WLAN_EID_VHT_CAPABILITY,
857 WLAN_EID_OPMODE_NOTIF,
858 };
859
860 noffset = ieee80211_ie_split_ric(assoc_data->ie,
861 assoc_data->ie_len,
862 before_ht,
863 ARRAY_SIZE(before_ht),
864 after_ric,
865 ARRAY_SIZE(after_ric),
866 offset);
867 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
868 offset = noffset;
869 }
870
871 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
872 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
873 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
874
875 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
876 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
877 sband, chan, sdata->smps_mode);
878
879 /* if present, add any custom IEs that go before VHT */
880 if (assoc_data->ie_len) {
881 static const u8 before_vht[] = {
882 /*
883 * no need to list the ones split off before HT
884 * or generated here
885 */
886 WLAN_EID_BSS_COEX_2040,
887 WLAN_EID_EXT_CAPABILITY,
888 WLAN_EID_QOS_TRAFFIC_CAPA,
889 WLAN_EID_TIM_BCAST_REQ,
890 WLAN_EID_INTERWORKING,
891 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
892 };
893
894 /* RIC already taken above, so no need to handle here anymore */
895 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
896 before_vht, ARRAY_SIZE(before_vht),
897 offset);
898 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
899 offset = noffset;
900 }
901
902 /* if present, add any custom IEs that go before HE */
903 if (assoc_data->ie_len) {
904 static const u8 before_he[] = {
905 /*
906 * no need to list the ones split off before VHT
907 * or generated here
908 */
909 WLAN_EID_OPMODE_NOTIF,
910 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
911 /* 11ai elements */
912 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
913 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
914 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
915 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
916 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
917 /* TODO: add 11ah/11aj/11ak elements */
918 };
919
920 /* RIC already taken above, so no need to handle here anymore */
921 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
922 before_he, ARRAY_SIZE(before_he),
923 offset);
924 pos = skb_put(skb, noffset - offset);
925 memcpy(pos, assoc_data->ie + offset, noffset - offset);
926 offset = noffset;
927 }
928
929 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
930 ieee80211_add_vht_ie(sdata, skb, sband,
931 &assoc_data->ap_vht_cap);
932
933 /*
934 * If AP doesn't support HT, mark HE as disabled.
935 * If on the 5GHz band, make sure it supports VHT.
936 */
937 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT ||
938 (sband->band == NL80211_BAND_5GHZ &&
939 ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
940 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
941
942 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
943 ieee80211_add_he_ie(sdata, skb, sband);
944
945 /* if present, add any custom non-vendor IEs that go after HE */
946 if (assoc_data->ie_len) {
947 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
948 assoc_data->ie_len,
949 offset);
950 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
951 offset = noffset;
952 }
953
954 if (assoc_data->wmm) {
955 if (assoc_data->uapsd) {
956 qos_info = ifmgd->uapsd_queues;
957 qos_info |= (ifmgd->uapsd_max_sp_len <<
958 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
959 } else {
960 qos_info = 0;
961 }
962
963 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
964 }
965
966 /* add any remaining custom (i.e. vendor specific here) IEs */
967 if (assoc_data->ie_len) {
968 noffset = assoc_data->ie_len;
969 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
970 }
971
972 if (assoc_data->fils_kek_len &&
973 fils_encrypt_assoc_req(skb, assoc_data) < 0) {
974 dev_kfree_skb(skb);
975 return;
976 }
977
978 pos = skb_tail_pointer(skb);
979 kfree(ifmgd->assoc_req_ies);
980 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC);
981 ifmgd->assoc_req_ies_len = pos - ie_start;
982
983 drv_mgd_prepare_tx(local, sdata, 0);
984
985 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
986 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
987 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
988 IEEE80211_TX_INTFL_MLME_CONN_TX;
989 ieee80211_tx_skb(sdata, skb);
990 }
991
992 void ieee80211_send_pspoll(struct ieee80211_local *local,
993 struct ieee80211_sub_if_data *sdata)
994 {
995 struct ieee80211_pspoll *pspoll;
996 struct sk_buff *skb;
997
998 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
999 if (!skb)
1000 return;
1001
1002 pspoll = (struct ieee80211_pspoll *) skb->data;
1003 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1004
1005 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1006 ieee80211_tx_skb(sdata, skb);
1007 }
1008
1009 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1010 struct ieee80211_sub_if_data *sdata,
1011 bool powersave)
1012 {
1013 struct sk_buff *skb;
1014 struct ieee80211_hdr_3addr *nullfunc;
1015 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1016
1017 /* Don't send NDPs when STA is connected HE */
1018 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1019 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
1020 return;
1021
1022 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
1023 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
1024 if (!skb)
1025 return;
1026
1027 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
1028 if (powersave)
1029 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1030
1031 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1032 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1033
1034 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1035 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
1036
1037 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1038 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1039
1040 ieee80211_tx_skb(sdata, skb);
1041 }
1042
1043 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
1044 struct ieee80211_sub_if_data *sdata)
1045 {
1046 struct sk_buff *skb;
1047 struct ieee80211_hdr *nullfunc;
1048 __le16 fc;
1049
1050 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1051 return;
1052
1053 /* Don't send NDPs when connected HE */
1054 if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE))
1055 return;
1056
1057 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1058 if (!skb)
1059 return;
1060
1061 skb_reserve(skb, local->hw.extra_tx_headroom);
1062
1063 nullfunc = skb_put_zero(skb, 30);
1064 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
1065 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1066 nullfunc->frame_control = fc;
1067 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
1068 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1069 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
1070 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
1071
1072 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1073 ieee80211_tx_skb(sdata, skb);
1074 }
1075
1076 /* spectrum management related things */
1077 static void ieee80211_chswitch_work(struct work_struct *work)
1078 {
1079 struct ieee80211_sub_if_data *sdata =
1080 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
1081 struct ieee80211_local *local = sdata->local;
1082 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1083 int ret;
1084
1085 if (!ieee80211_sdata_running(sdata))
1086 return;
1087
1088 sdata_lock(sdata);
1089 mutex_lock(&local->mtx);
1090 mutex_lock(&local->chanctx_mtx);
1091
1092 if (!ifmgd->associated)
1093 goto out;
1094
1095 if (!sdata->vif.csa_active)
1096 goto out;
1097
1098 /*
1099 * using reservation isn't immediate as it may be deferred until later
1100 * with multi-vif. once reservation is complete it will re-schedule the
1101 * work with no reserved_chanctx so verify chandef to check if it
1102 * completed successfully
1103 */
1104
1105 if (sdata->reserved_chanctx) {
1106 struct ieee80211_supported_band *sband = NULL;
1107 struct sta_info *mgd_sta = NULL;
1108 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;
1109
1110 /*
1111 * with multi-vif csa driver may call ieee80211_csa_finish()
1112 * many times while waiting for other interfaces to use their
1113 * reservations
1114 */
1115 if (sdata->reserved_ready)
1116 goto out;
1117
1118 if (sdata->vif.bss_conf.chandef.width !=
1119 sdata->csa_chandef.width) {
1120 /*
1121 * For managed interface, we need to also update the AP
1122 * station bandwidth and align the rate scale algorithm
1123 * on the bandwidth change. Here we only consider the
1124 * bandwidth of the new channel definition (as channel
1125 * switch flow does not have the full HT/VHT/HE
1126 * information), assuming that if additional changes are
1127 * required they would be done as part of the processing
1128 * of the next beacon from the AP.
1129 */
1130 switch (sdata->csa_chandef.width) {
1131 case NL80211_CHAN_WIDTH_20_NOHT:
1132 case NL80211_CHAN_WIDTH_20:
1133 default:
1134 bw = IEEE80211_STA_RX_BW_20;
1135 break;
1136 case NL80211_CHAN_WIDTH_40:
1137 bw = IEEE80211_STA_RX_BW_40;
1138 break;
1139 case NL80211_CHAN_WIDTH_80:
1140 bw = IEEE80211_STA_RX_BW_80;
1141 break;
1142 case NL80211_CHAN_WIDTH_80P80:
1143 case NL80211_CHAN_WIDTH_160:
1144 bw = IEEE80211_STA_RX_BW_160;
1145 break;
1146 }
1147
1148 mgd_sta = sta_info_get(sdata, ifmgd->bssid);
1149 sband =
1150 local->hw.wiphy->bands[sdata->csa_chandef.chan->band];
1151 }
1152
1153 if (sdata->vif.bss_conf.chandef.width >
1154 sdata->csa_chandef.width) {
1155 mgd_sta->sta.bandwidth = bw;
1156 rate_control_rate_update(local, sband, mgd_sta,
1157 IEEE80211_RC_BW_CHANGED);
1158 }
1159
1160 ret = ieee80211_vif_use_reserved_context(sdata);
1161 if (ret) {
1162 sdata_info(sdata,
1163 "failed to use reserved channel context, disconnecting (err=%d)\n",
1164 ret);
1165 ieee80211_queue_work(&sdata->local->hw,
1166 &ifmgd->csa_connection_drop_work);
1167 goto out;
1168 }
1169
1170 if (sdata->vif.bss_conf.chandef.width <
1171 sdata->csa_chandef.width) {
1172 mgd_sta->sta.bandwidth = bw;
1173 rate_control_rate_update(local, sband, mgd_sta,
1174 IEEE80211_RC_BW_CHANGED);
1175 }
1176
1177 goto out;
1178 }
1179
1180 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1181 &sdata->csa_chandef)) {
1182 sdata_info(sdata,
1183 "failed to finalize channel switch, disconnecting\n");
1184 ieee80211_queue_work(&sdata->local->hw,
1185 &ifmgd->csa_connection_drop_work);
1186 goto out;
1187 }
1188
1189 ifmgd->csa_waiting_bcn = true;
1190
1191 ieee80211_sta_reset_beacon_monitor(sdata);
1192 ieee80211_sta_reset_conn_monitor(sdata);
1193
1194 out:
1195 mutex_unlock(&local->chanctx_mtx);
1196 mutex_unlock(&local->mtx);
1197 sdata_unlock(sdata);
1198 }
1199
1200 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1201 {
1202 struct ieee80211_local *local = sdata->local;
1203 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1204 int ret;
1205
1206 sdata_assert_lock(sdata);
1207
1208 WARN_ON(!sdata->vif.csa_active);
1209
1210 if (sdata->csa_block_tx) {
1211 ieee80211_wake_vif_queues(local, sdata,
1212 IEEE80211_QUEUE_STOP_REASON_CSA);
1213 sdata->csa_block_tx = false;
1214 }
1215
1216 sdata->vif.csa_active = false;
1217 ifmgd->csa_waiting_bcn = false;
1218
1219 ret = drv_post_channel_switch(sdata);
1220 if (ret) {
1221 sdata_info(sdata,
1222 "driver post channel switch failed, disconnecting\n");
1223 ieee80211_queue_work(&local->hw,
1224 &ifmgd->csa_connection_drop_work);
1225 return;
1226 }
1227
1228 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1229 }
1230
1231 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1232 {
1233 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1234 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1235
1236 trace_api_chswitch_done(sdata, success);
1237 if (!success) {
1238 sdata_info(sdata,
1239 "driver channel switch failed, disconnecting\n");
1240 ieee80211_queue_work(&sdata->local->hw,
1241 &ifmgd->csa_connection_drop_work);
1242 } else {
1243 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1244 }
1245 }
1246 EXPORT_SYMBOL(ieee80211_chswitch_done);
1247
1248 static void ieee80211_chswitch_timer(struct timer_list *t)
1249 {
1250 struct ieee80211_sub_if_data *sdata =
1251 from_timer(sdata, t, u.mgd.chswitch_timer);
1252
1253 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1254 }
1255
1256 static void
1257 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata)
1258 {
1259 struct ieee80211_local *local = sdata->local;
1260
1261 if (!local->ops->abort_channel_switch)
1262 return;
1263
1264 mutex_lock(&local->mtx);
1265
1266 mutex_lock(&local->chanctx_mtx);
1267 ieee80211_vif_unreserve_chanctx(sdata);
1268 mutex_unlock(&local->chanctx_mtx);
1269
1270 if (sdata->csa_block_tx)
1271 ieee80211_wake_vif_queues(local, sdata,
1272 IEEE80211_QUEUE_STOP_REASON_CSA);
1273
1274 sdata->csa_block_tx = false;
1275 sdata->vif.csa_active = false;
1276
1277 mutex_unlock(&local->mtx);
1278
1279 drv_abort_channel_switch(sdata);
1280 }
1281
1282 static void
1283 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1284 u64 timestamp, u32 device_timestamp,
1285 struct ieee802_11_elems *elems,
1286 bool beacon)
1287 {
1288 struct ieee80211_local *local = sdata->local;
1289 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1290 struct cfg80211_bss *cbss = ifmgd->associated;
1291 struct ieee80211_chanctx_conf *conf;
1292 struct ieee80211_chanctx *chanctx;
1293 enum nl80211_band current_band;
1294 struct ieee80211_csa_ie csa_ie;
1295 struct ieee80211_channel_switch ch_switch;
1296 int res;
1297
1298 sdata_assert_lock(sdata);
1299
1300 if (!cbss)
1301 return;
1302
1303 if (local->scanning)
1304 return;
1305
1306 current_band = cbss->channel->band;
1307 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1308 ifmgd->flags,
1309 ifmgd->associated->bssid, &csa_ie);
1310
1311 if (!res) {
1312 ch_switch.timestamp = timestamp;
1313 ch_switch.device_timestamp = device_timestamp;
1314 ch_switch.block_tx = beacon ? csa_ie.mode : 0;
1315 ch_switch.chandef = csa_ie.chandef;
1316 ch_switch.count = csa_ie.count;
1317 ch_switch.delay = csa_ie.max_switch_time;
1318 }
1319
1320 if (res < 0) {
1321 ieee80211_queue_work(&local->hw,
1322 &ifmgd->csa_connection_drop_work);
1323 return;
1324 }
1325
1326 if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) {
1327 if (res)
1328 ieee80211_sta_abort_chanswitch(sdata);
1329 else
1330 drv_channel_switch_rx_beacon(sdata, &ch_switch);
1331 return;
1332 } else if (sdata->vif.csa_active || res) {
1333 /* disregard subsequent announcements if already processing */
1334 return;
1335 }
1336
1337 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1338 IEEE80211_CHAN_DISABLED)) {
1339 sdata_info(sdata,
1340 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1341 ifmgd->associated->bssid,
1342 csa_ie.chandef.chan->center_freq,
1343 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1344 csa_ie.chandef.center_freq2);
1345 ieee80211_queue_work(&local->hw,
1346 &ifmgd->csa_connection_drop_work);
1347 return;
1348 }
1349
1350 if (cfg80211_chandef_identical(&csa_ie.chandef,
1351 &sdata->vif.bss_conf.chandef) &&
1352 (!csa_ie.mode || !beacon)) {
1353 if (ifmgd->csa_ignored_same_chan)
1354 return;
1355 sdata_info(sdata,
1356 "AP %pM tries to chanswitch to same channel, ignore\n",
1357 ifmgd->associated->bssid);
1358 ifmgd->csa_ignored_same_chan = true;
1359 return;
1360 }
1361
1362 /*
1363 * Drop all TDLS peers - either we disconnect or move to a different
1364 * channel from this point on. There's no telling what our peer will do.
1365 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1366 * have an incompatible wider chandef.
1367 */
1368 ieee80211_teardown_tdls_peers(sdata);
1369
1370 mutex_lock(&local->mtx);
1371 mutex_lock(&local->chanctx_mtx);
1372 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1373 lockdep_is_held(&local->chanctx_mtx));
1374 if (!conf) {
1375 sdata_info(sdata,
1376 "no channel context assigned to vif?, disconnecting\n");
1377 goto drop_connection;
1378 }
1379
1380 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1381
1382 if (local->use_chanctx &&
1383 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1384 sdata_info(sdata,
1385 "driver doesn't support chan-switch with channel contexts\n");
1386 goto drop_connection;
1387 }
1388
1389 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1390 sdata_info(sdata,
1391 "preparing for channel switch failed, disconnecting\n");
1392 goto drop_connection;
1393 }
1394
1395 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1396 chanctx->mode, false);
1397 if (res) {
1398 sdata_info(sdata,
1399 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1400 res);
1401 goto drop_connection;
1402 }
1403 mutex_unlock(&local->chanctx_mtx);
1404
1405 sdata->vif.csa_active = true;
1406 sdata->csa_chandef = csa_ie.chandef;
1407 sdata->csa_block_tx = ch_switch.block_tx;
1408 ifmgd->csa_ignored_same_chan = false;
1409
1410 if (sdata->csa_block_tx)
1411 ieee80211_stop_vif_queues(local, sdata,
1412 IEEE80211_QUEUE_STOP_REASON_CSA);
1413 mutex_unlock(&local->mtx);
1414
1415 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1416 csa_ie.count);
1417
1418 if (local->ops->channel_switch) {
1419 /* use driver's channel switch callback */
1420 drv_channel_switch(local, sdata, &ch_switch);
1421 return;
1422 }
1423
1424 /* channel switch handled in software */
1425 if (csa_ie.count <= 1)
1426 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1427 else
1428 mod_timer(&ifmgd->chswitch_timer,
1429 TU_TO_EXP_TIME((csa_ie.count - 1) *
1430 cbss->beacon_interval));
1431 return;
1432 drop_connection:
1433 /*
1434 * This is just so that the disconnect flow will know that
1435 * we were trying to switch channel and failed. In case the
1436 * mode is 1 (we are not allowed to Tx), we will know not to
1437 * send a deauthentication frame. Those two fields will be
1438 * reset when the disconnection worker runs.
1439 */
1440 sdata->vif.csa_active = true;
1441 sdata->csa_block_tx = ch_switch.block_tx;
1442
1443 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1444 mutex_unlock(&local->chanctx_mtx);
1445 mutex_unlock(&local->mtx);
1446 }
1447
1448 static bool
1449 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1450 struct ieee80211_channel *channel,
1451 const u8 *country_ie, u8 country_ie_len,
1452 const u8 *pwr_constr_elem,
1453 int *chan_pwr, int *pwr_reduction)
1454 {
1455 struct ieee80211_country_ie_triplet *triplet;
1456 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1457 int i, chan_increment;
1458 bool have_chan_pwr = false;
1459
1460 /* Invalid IE */
1461 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1462 return false;
1463
1464 triplet = (void *)(country_ie + 3);
1465 country_ie_len -= 3;
1466
1467 switch (channel->band) {
1468 default:
1469 WARN_ON_ONCE(1);
1470 /* fall through */
1471 case NL80211_BAND_2GHZ:
1472 case NL80211_BAND_60GHZ:
1473 chan_increment = 1;
1474 break;
1475 case NL80211_BAND_5GHZ:
1476 chan_increment = 4;
1477 break;
1478 }
1479
1480 /* find channel */
1481 while (country_ie_len >= 3) {
1482 u8 first_channel = triplet->chans.first_channel;
1483
1484 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1485 goto next;
1486
1487 for (i = 0; i < triplet->chans.num_channels; i++) {
1488 if (first_channel + i * chan_increment == chan) {
1489 have_chan_pwr = true;
1490 *chan_pwr = triplet->chans.max_power;
1491 break;
1492 }
1493 }
1494 if (have_chan_pwr)
1495 break;
1496
1497 next:
1498 triplet++;
1499 country_ie_len -= 3;
1500 }
1501
1502 if (have_chan_pwr && pwr_constr_elem)
1503 *pwr_reduction = *pwr_constr_elem;
1504 else
1505 *pwr_reduction = 0;
1506
1507 return have_chan_pwr;
1508 }
1509
1510 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1511 struct ieee80211_channel *channel,
1512 const u8 *cisco_dtpc_ie,
1513 int *pwr_level)
1514 {
1515 /* From practical testing, the first data byte of the DTPC element
1516 * seems to contain the requested dBm level, and the CLI on Cisco
1517 * APs clearly state the range is -127 to 127 dBm, which indicates
1518 * a signed byte, although it seemingly never actually goes negative.
1519 * The other byte seems to always be zero.
1520 */
1521 *pwr_level = (__s8)cisco_dtpc_ie[4];
1522 }
1523
1524 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1525 struct ieee80211_channel *channel,
1526 struct ieee80211_mgmt *mgmt,
1527 const u8 *country_ie, u8 country_ie_len,
1528 const u8 *pwr_constr_ie,
1529 const u8 *cisco_dtpc_ie)
1530 {
1531 bool has_80211h_pwr = false, has_cisco_pwr = false;
1532 int chan_pwr = 0, pwr_reduction_80211h = 0;
1533 int pwr_level_cisco, pwr_level_80211h;
1534 int new_ap_level;
1535 __le16 capab = mgmt->u.probe_resp.capab_info;
1536
1537 if (country_ie &&
1538 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1539 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1540 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1541 sdata, channel, country_ie, country_ie_len,
1542 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1543 pwr_level_80211h =
1544 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1545 }
1546
1547 if (cisco_dtpc_ie) {
1548 ieee80211_find_cisco_dtpc(
1549 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1550 has_cisco_pwr = true;
1551 }
1552
1553 if (!has_80211h_pwr && !has_cisco_pwr)
1554 return 0;
1555
1556 /* If we have both 802.11h and Cisco DTPC, apply both limits
1557 * by picking the smallest of the two power levels advertised.
1558 */
1559 if (has_80211h_pwr &&
1560 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1561 new_ap_level = pwr_level_80211h;
1562
1563 if (sdata->ap_power_level == new_ap_level)
1564 return 0;
1565
1566 sdata_dbg(sdata,
1567 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1568 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1569 sdata->u.mgd.bssid);
1570 } else { /* has_cisco_pwr is always true here. */
1571 new_ap_level = pwr_level_cisco;
1572
1573 if (sdata->ap_power_level == new_ap_level)
1574 return 0;
1575
1576 sdata_dbg(sdata,
1577 "Limiting TX power to %d dBm as advertised by %pM\n",
1578 pwr_level_cisco, sdata->u.mgd.bssid);
1579 }
1580
1581 sdata->ap_power_level = new_ap_level;
1582 if (__ieee80211_recalc_txpower(sdata))
1583 return BSS_CHANGED_TXPOWER;
1584 return 0;
1585 }
1586
1587 /* powersave */
1588 static void ieee80211_enable_ps(struct ieee80211_local *local,
1589 struct ieee80211_sub_if_data *sdata)
1590 {
1591 struct ieee80211_conf *conf = &local->hw.conf;
1592
1593 /*
1594 * If we are scanning right now then the parameters will
1595 * take effect when scan finishes.
1596 */
1597 if (local->scanning)
1598 return;
1599
1600 if (conf->dynamic_ps_timeout > 0 &&
1601 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1602 mod_timer(&local->dynamic_ps_timer, jiffies +
1603 msecs_to_jiffies(conf->dynamic_ps_timeout));
1604 } else {
1605 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1606 ieee80211_send_nullfunc(local, sdata, true);
1607
1608 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1609 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1610 return;
1611
1612 conf->flags |= IEEE80211_CONF_PS;
1613 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1614 }
1615 }
1616
1617 static void ieee80211_change_ps(struct ieee80211_local *local)
1618 {
1619 struct ieee80211_conf *conf = &local->hw.conf;
1620
1621 if (local->ps_sdata) {
1622 ieee80211_enable_ps(local, local->ps_sdata);
1623 } else if (conf->flags & IEEE80211_CONF_PS) {
1624 conf->flags &= ~IEEE80211_CONF_PS;
1625 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1626 del_timer_sync(&local->dynamic_ps_timer);
1627 cancel_work_sync(&local->dynamic_ps_enable_work);
1628 }
1629 }
1630
1631 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1632 {
1633 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1634 struct sta_info *sta = NULL;
1635 bool authorized = false;
1636
1637 if (!mgd->powersave)
1638 return false;
1639
1640 if (mgd->broken_ap)
1641 return false;
1642
1643 if (!mgd->associated)
1644 return false;
1645
1646 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1647 return false;
1648
1649 if (!mgd->have_beacon)
1650 return false;
1651
1652 rcu_read_lock();
1653 sta = sta_info_get(sdata, mgd->bssid);
1654 if (sta)
1655 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1656 rcu_read_unlock();
1657
1658 return authorized;
1659 }
1660
1661 /* need to hold RTNL or interface lock */
1662 void ieee80211_recalc_ps(struct ieee80211_local *local)
1663 {
1664 struct ieee80211_sub_if_data *sdata, *found = NULL;
1665 int count = 0;
1666 int timeout;
1667
1668 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1669 local->ps_sdata = NULL;
1670 return;
1671 }
1672
1673 list_for_each_entry(sdata, &local->interfaces, list) {
1674 if (!ieee80211_sdata_running(sdata))
1675 continue;
1676 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1677 /* If an AP vif is found, then disable PS
1678 * by setting the count to zero thereby setting
1679 * ps_sdata to NULL.
1680 */
1681 count = 0;
1682 break;
1683 }
1684 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1685 continue;
1686 found = sdata;
1687 count++;
1688 }
1689
1690 if (count == 1 && ieee80211_powersave_allowed(found)) {
1691 u8 dtimper = found->u.mgd.dtim_period;
1692
1693 timeout = local->dynamic_ps_forced_timeout;
1694 if (timeout < 0)
1695 timeout = 100;
1696 local->hw.conf.dynamic_ps_timeout = timeout;
1697
1698 /* If the TIM IE is invalid, pretend the value is 1 */
1699 if (!dtimper)
1700 dtimper = 1;
1701
1702 local->hw.conf.ps_dtim_period = dtimper;
1703 local->ps_sdata = found;
1704 } else {
1705 local->ps_sdata = NULL;
1706 }
1707
1708 ieee80211_change_ps(local);
1709 }
1710
1711 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1712 {
1713 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1714
1715 if (sdata->vif.bss_conf.ps != ps_allowed) {
1716 sdata->vif.bss_conf.ps = ps_allowed;
1717 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1718 }
1719 }
1720
1721 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1722 {
1723 struct ieee80211_local *local =
1724 container_of(work, struct ieee80211_local,
1725 dynamic_ps_disable_work);
1726
1727 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1728 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1729 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1730 }
1731
1732 ieee80211_wake_queues_by_reason(&local->hw,
1733 IEEE80211_MAX_QUEUE_MAP,
1734 IEEE80211_QUEUE_STOP_REASON_PS,
1735 false);
1736 }
1737
1738 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1739 {
1740 struct ieee80211_local *local =
1741 container_of(work, struct ieee80211_local,
1742 dynamic_ps_enable_work);
1743 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1744 struct ieee80211_if_managed *ifmgd;
1745 unsigned long flags;
1746 int q;
1747
1748 /* can only happen when PS was just disabled anyway */
1749 if (!sdata)
1750 return;
1751
1752 ifmgd = &sdata->u.mgd;
1753
1754 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1755 return;
1756
1757 if (local->hw.conf.dynamic_ps_timeout > 0) {
1758 /* don't enter PS if TX frames are pending */
1759 if (drv_tx_frames_pending(local)) {
1760 mod_timer(&local->dynamic_ps_timer, jiffies +
1761 msecs_to_jiffies(
1762 local->hw.conf.dynamic_ps_timeout));
1763 return;
1764 }
1765
1766 /*
1767 * transmission can be stopped by others which leads to
1768 * dynamic_ps_timer expiry. Postpone the ps timer if it
1769 * is not the actual idle state.
1770 */
1771 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1772 for (q = 0; q < local->hw.queues; q++) {
1773 if (local->queue_stop_reasons[q]) {
1774 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1775 flags);
1776 mod_timer(&local->dynamic_ps_timer, jiffies +
1777 msecs_to_jiffies(
1778 local->hw.conf.dynamic_ps_timeout));
1779 return;
1780 }
1781 }
1782 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1783 }
1784
1785 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1786 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1787 if (drv_tx_frames_pending(local)) {
1788 mod_timer(&local->dynamic_ps_timer, jiffies +
1789 msecs_to_jiffies(
1790 local->hw.conf.dynamic_ps_timeout));
1791 } else {
1792 ieee80211_send_nullfunc(local, sdata, true);
1793 /* Flush to get the tx status of nullfunc frame */
1794 ieee80211_flush_queues(local, sdata, false);
1795 }
1796 }
1797
1798 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1799 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1800 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1801 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1802 local->hw.conf.flags |= IEEE80211_CONF_PS;
1803 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1804 }
1805 }
1806
1807 void ieee80211_dynamic_ps_timer(struct timer_list *t)
1808 {
1809 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1810
1811 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1812 }
1813
1814 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1815 {
1816 struct delayed_work *delayed_work = to_delayed_work(work);
1817 struct ieee80211_sub_if_data *sdata =
1818 container_of(delayed_work, struct ieee80211_sub_if_data,
1819 dfs_cac_timer_work);
1820 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1821
1822 mutex_lock(&sdata->local->mtx);
1823 if (sdata->wdev.cac_started) {
1824 ieee80211_vif_release_channel(sdata);
1825 cfg80211_cac_event(sdata->dev, &chandef,
1826 NL80211_RADAR_CAC_FINISHED,
1827 GFP_KERNEL);
1828 }
1829 mutex_unlock(&sdata->local->mtx);
1830 }
1831
1832 static bool
1833 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1834 {
1835 struct ieee80211_local *local = sdata->local;
1836 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1837 bool ret = false;
1838 int ac;
1839
1840 if (local->hw.queues < IEEE80211_NUM_ACS)
1841 return false;
1842
1843 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1844 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1845 int non_acm_ac;
1846 unsigned long now = jiffies;
1847
1848 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1849 tx_tspec->admitted_time &&
1850 time_after(now, tx_tspec->time_slice_start + HZ)) {
1851 tx_tspec->consumed_tx_time = 0;
1852 tx_tspec->time_slice_start = now;
1853
1854 if (tx_tspec->downgraded)
1855 tx_tspec->action =
1856 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1857 }
1858
1859 switch (tx_tspec->action) {
1860 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1861 /* take the original parameters */
1862 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1863 sdata_err(sdata,
1864 "failed to set TX queue parameters for queue %d\n",
1865 ac);
1866 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1867 tx_tspec->downgraded = false;
1868 ret = true;
1869 break;
1870 case TX_TSPEC_ACTION_DOWNGRADE:
1871 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1872 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1873 ret = true;
1874 break;
1875 }
1876 /* downgrade next lower non-ACM AC */
1877 for (non_acm_ac = ac + 1;
1878 non_acm_ac < IEEE80211_NUM_ACS;
1879 non_acm_ac++)
1880 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1881 break;
1882 /* Usually the loop will result in using BK even if it
1883 * requires admission control, but such a configuration
1884 * makes no sense and we have to transmit somehow - the
1885 * AC selection does the same thing.
1886 * If we started out trying to downgrade from BK, then
1887 * the extra condition here might be needed.
1888 */
1889 if (non_acm_ac >= IEEE80211_NUM_ACS)
1890 non_acm_ac = IEEE80211_AC_BK;
1891 if (drv_conf_tx(local, sdata, ac,
1892 &sdata->tx_conf[non_acm_ac]))
1893 sdata_err(sdata,
1894 "failed to set TX queue parameters for queue %d\n",
1895 ac);
1896 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1897 ret = true;
1898 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1899 tx_tspec->time_slice_start + HZ - now + 1);
1900 break;
1901 case TX_TSPEC_ACTION_NONE:
1902 /* nothing now */
1903 break;
1904 }
1905 }
1906
1907 return ret;
1908 }
1909
1910 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1911 {
1912 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1913 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1914 }
1915
1916 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1917 {
1918 struct ieee80211_sub_if_data *sdata;
1919
1920 sdata = container_of(work, struct ieee80211_sub_if_data,
1921 u.mgd.tx_tspec_wk.work);
1922 ieee80211_sta_handle_tspec_ac_params(sdata);
1923 }
1924
1925 /* MLME */
1926 static bool
1927 ieee80211_sta_wmm_params(struct ieee80211_local *local,
1928 struct ieee80211_sub_if_data *sdata,
1929 const u8 *wmm_param, size_t wmm_param_len,
1930 const struct ieee80211_mu_edca_param_set *mu_edca)
1931 {
1932 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1933 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1934 size_t left;
1935 int count, mu_edca_count, ac;
1936 const u8 *pos;
1937 u8 uapsd_queues = 0;
1938
1939 if (!local->ops->conf_tx)
1940 return false;
1941
1942 if (local->hw.queues < IEEE80211_NUM_ACS)
1943 return false;
1944
1945 if (!wmm_param)
1946 return false;
1947
1948 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1949 return false;
1950
1951 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1952 uapsd_queues = ifmgd->uapsd_queues;
1953
1954 count = wmm_param[6] & 0x0f;
1955 /* -1 is the initial value of ifmgd->mu_edca_last_param_set.
1956 * if mu_edca was preset before and now it disappeared tell
1957 * the driver about it.
1958 */
1959 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1;
1960 if (count == ifmgd->wmm_last_param_set &&
1961 mu_edca_count == ifmgd->mu_edca_last_param_set)
1962 return false;
1963 ifmgd->wmm_last_param_set = count;
1964 ifmgd->mu_edca_last_param_set = mu_edca_count;
1965
1966 pos = wmm_param + 8;
1967 left = wmm_param_len - 8;
1968
1969 memset(&params, 0, sizeof(params));
1970
1971 sdata->wmm_acm = 0;
1972 for (; left >= 4; left -= 4, pos += 4) {
1973 int aci = (pos[0] >> 5) & 0x03;
1974 int acm = (pos[0] >> 4) & 0x01;
1975 bool uapsd = false;
1976
1977 switch (aci) {
1978 case 1: /* AC_BK */
1979 ac = IEEE80211_AC_BK;
1980 if (acm)
1981 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1982 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1983 uapsd = true;
1984 params[ac].mu_edca = !!mu_edca;
1985 if (mu_edca)
1986 params[ac].mu_edca_param_rec = mu_edca->ac_bk;
1987 break;
1988 case 2: /* AC_VI */
1989 ac = IEEE80211_AC_VI;
1990 if (acm)
1991 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1992 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1993 uapsd = true;
1994 params[ac].mu_edca = !!mu_edca;
1995 if (mu_edca)
1996 params[ac].mu_edca_param_rec = mu_edca->ac_vi;
1997 break;
1998 case 3: /* AC_VO */
1999 ac = IEEE80211_AC_VO;
2000 if (acm)
2001 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
2002 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
2003 uapsd = true;
2004 params[ac].mu_edca = !!mu_edca;
2005 if (mu_edca)
2006 params[ac].mu_edca_param_rec = mu_edca->ac_vo;
2007 break;
2008 case 0: /* AC_BE */
2009 default:
2010 ac = IEEE80211_AC_BE;
2011 if (acm)
2012 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
2013 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
2014 uapsd = true;
2015 params[ac].mu_edca = !!mu_edca;
2016 if (mu_edca)
2017 params[ac].mu_edca_param_rec = mu_edca->ac_be;
2018 break;
2019 }
2020
2021 params[ac].aifs = pos[0] & 0x0f;
2022
2023 if (params[ac].aifs < 2) {
2024 sdata_info(sdata,
2025 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
2026 params[ac].aifs, aci);
2027 params[ac].aifs = 2;
2028 }
2029 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
2030 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
2031 params[ac].txop = get_unaligned_le16(pos + 2);
2032 params[ac].acm = acm;
2033 params[ac].uapsd = uapsd;
2034
2035 if (params[ac].cw_min == 0 ||
2036 params[ac].cw_min > params[ac].cw_max) {
2037 sdata_info(sdata,
2038 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
2039 params[ac].cw_min, params[ac].cw_max, aci);
2040 return false;
2041 }
2042 ieee80211_regulatory_limit_wmm_params(sdata, &params[ac], ac);
2043 }
2044
2045 /* WMM specification requires all 4 ACIs. */
2046 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2047 if (params[ac].cw_min == 0) {
2048 sdata_info(sdata,
2049 "AP has invalid WMM params (missing AC %d), using defaults\n",
2050 ac);
2051 return false;
2052 }
2053 }
2054
2055 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2056 mlme_dbg(sdata,
2057 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
2058 ac, params[ac].acm,
2059 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
2060 params[ac].txop, params[ac].uapsd,
2061 ifmgd->tx_tspec[ac].downgraded);
2062 sdata->tx_conf[ac] = params[ac];
2063 if (!ifmgd->tx_tspec[ac].downgraded &&
2064 drv_conf_tx(local, sdata, ac, &params[ac]))
2065 sdata_err(sdata,
2066 "failed to set TX queue parameters for AC %d\n",
2067 ac);
2068 }
2069
2070 /* enable WMM or activate new settings */
2071 sdata->vif.bss_conf.qos = true;
2072 return true;
2073 }
2074
2075 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2076 {
2077 lockdep_assert_held(&sdata->local->mtx);
2078
2079 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2080 ieee80211_run_deferred_scan(sdata->local);
2081 }
2082
2083 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2084 {
2085 mutex_lock(&sdata->local->mtx);
2086 __ieee80211_stop_poll(sdata);
2087 mutex_unlock(&sdata->local->mtx);
2088 }
2089
2090 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
2091 u16 capab, bool erp_valid, u8 erp)
2092 {
2093 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2094 struct ieee80211_supported_band *sband;
2095 u32 changed = 0;
2096 bool use_protection;
2097 bool use_short_preamble;
2098 bool use_short_slot;
2099
2100 sband = ieee80211_get_sband(sdata);
2101 if (!sband)
2102 return changed;
2103
2104 if (erp_valid) {
2105 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
2106 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
2107 } else {
2108 use_protection = false;
2109 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
2110 }
2111
2112 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
2113 if (sband->band == NL80211_BAND_5GHZ)
2114 use_short_slot = true;
2115
2116 if (use_protection != bss_conf->use_cts_prot) {
2117 bss_conf->use_cts_prot = use_protection;
2118 changed |= BSS_CHANGED_ERP_CTS_PROT;
2119 }
2120
2121 if (use_short_preamble != bss_conf->use_short_preamble) {
2122 bss_conf->use_short_preamble = use_short_preamble;
2123 changed |= BSS_CHANGED_ERP_PREAMBLE;
2124 }
2125
2126 if (use_short_slot != bss_conf->use_short_slot) {
2127 bss_conf->use_short_slot = use_short_slot;
2128 changed |= BSS_CHANGED_ERP_SLOT;
2129 }
2130
2131 return changed;
2132 }
2133
2134 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2135 struct cfg80211_bss *cbss,
2136 u32 bss_info_changed)
2137 {
2138 struct ieee80211_bss *bss = (void *)cbss->priv;
2139 struct ieee80211_local *local = sdata->local;
2140 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2141
2142 bss_info_changed |= BSS_CHANGED_ASSOC;
2143 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
2144 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
2145
2146 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
2147 beacon_loss_count * bss_conf->beacon_int));
2148
2149 sdata->u.mgd.associated = cbss;
2150 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2151
2152 ieee80211_check_rate_mask(sdata);
2153
2154 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
2155
2156 if (sdata->vif.p2p ||
2157 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2158 const struct cfg80211_bss_ies *ies;
2159
2160 rcu_read_lock();
2161 ies = rcu_dereference(cbss->ies);
2162 if (ies) {
2163 int ret;
2164
2165 ret = cfg80211_get_p2p_attr(
2166 ies->data, ies->len,
2167 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2168 (u8 *) &bss_conf->p2p_noa_attr,
2169 sizeof(bss_conf->p2p_noa_attr));
2170 if (ret >= 2) {
2171 sdata->u.mgd.p2p_noa_index =
2172 bss_conf->p2p_noa_attr.index;
2173 bss_info_changed |= BSS_CHANGED_P2P_PS;
2174 }
2175 }
2176 rcu_read_unlock();
2177 }
2178
2179 /* just to be sure */
2180 ieee80211_stop_poll(sdata);
2181
2182 ieee80211_led_assoc(local, 1);
2183
2184 if (sdata->u.mgd.have_beacon) {
2185 /*
2186 * If the AP is buggy we may get here with no DTIM period
2187 * known, so assume it's 1 which is the only safe assumption
2188 * in that case, although if the TIM IE is broken powersave
2189 * probably just won't work at all.
2190 */
2191 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
2192 bss_conf->beacon_rate = bss->beacon_rate;
2193 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2194 } else {
2195 bss_conf->beacon_rate = NULL;
2196 bss_conf->dtim_period = 0;
2197 }
2198
2199 bss_conf->assoc = 1;
2200
2201 /* Tell the driver to monitor connection quality (if supported) */
2202 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2203 bss_conf->cqm_rssi_thold)
2204 bss_info_changed |= BSS_CHANGED_CQM;
2205
2206 /* Enable ARP filtering */
2207 if (bss_conf->arp_addr_cnt)
2208 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
2209
2210 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2211
2212 mutex_lock(&local->iflist_mtx);
2213 ieee80211_recalc_ps(local);
2214 mutex_unlock(&local->iflist_mtx);
2215
2216 ieee80211_recalc_smps(sdata);
2217 ieee80211_recalc_ps_vif(sdata);
2218
2219 netif_carrier_on(sdata->dev);
2220 }
2221
2222 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2223 u16 stype, u16 reason, bool tx,
2224 u8 *frame_buf)
2225 {
2226 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2227 struct ieee80211_local *local = sdata->local;
2228 u32 changed = 0;
2229
2230 sdata_assert_lock(sdata);
2231
2232 if (WARN_ON_ONCE(tx && !frame_buf))
2233 return;
2234
2235 if (WARN_ON(!ifmgd->associated))
2236 return;
2237
2238 ieee80211_stop_poll(sdata);
2239
2240 ifmgd->associated = NULL;
2241 netif_carrier_off(sdata->dev);
2242
2243 /*
2244 * if we want to get out of ps before disassoc (why?) we have
2245 * to do it before sending disassoc, as otherwise the null-packet
2246 * won't be valid.
2247 */
2248 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2249 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2250 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2251 }
2252 local->ps_sdata = NULL;
2253
2254 /* disable per-vif ps */
2255 ieee80211_recalc_ps_vif(sdata);
2256
2257 /* make sure ongoing transmission finishes */
2258 synchronize_net();
2259
2260 /*
2261 * drop any frame before deauth/disassoc, this can be data or
2262 * management frame. Since we are disconnecting, we should not
2263 * insist sending these frames which can take time and delay
2264 * the disconnection and possible the roaming.
2265 */
2266 if (tx)
2267 ieee80211_flush_queues(local, sdata, true);
2268
2269 /* deauthenticate/disassociate now */
2270 if (tx || frame_buf) {
2271 /*
2272 * In multi channel scenarios guarantee that the virtual
2273 * interface is granted immediate airtime to transmit the
2274 * deauthentication frame by calling mgd_prepare_tx, if the
2275 * driver requested so.
2276 */
2277 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
2278 !ifmgd->have_beacon)
2279 drv_mgd_prepare_tx(sdata->local, sdata, 0);
2280
2281 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid,
2282 ifmgd->bssid, stype, reason,
2283 tx, frame_buf);
2284 }
2285
2286 /* flush out frame - make sure the deauth was actually sent */
2287 if (tx)
2288 ieee80211_flush_queues(local, sdata, false);
2289
2290 /* clear bssid only after building the needed mgmt frames */
2291 eth_zero_addr(ifmgd->bssid);
2292
2293 /* remove AP and TDLS peers */
2294 sta_info_flush(sdata);
2295
2296 /* finally reset all BSS / config parameters */
2297 changed |= ieee80211_reset_erp_info(sdata);
2298
2299 ieee80211_led_assoc(local, 0);
2300 changed |= BSS_CHANGED_ASSOC;
2301 sdata->vif.bss_conf.assoc = false;
2302
2303 ifmgd->p2p_noa_index = -1;
2304 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2305 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2306
2307 /* on the next assoc, re-program HT/VHT parameters */
2308 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2309 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2310 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2311 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2312
2313 /* reset MU-MIMO ownership and group data */
2314 memset(sdata->vif.bss_conf.mu_group.membership, 0,
2315 sizeof(sdata->vif.bss_conf.mu_group.membership));
2316 memset(sdata->vif.bss_conf.mu_group.position, 0,
2317 sizeof(sdata->vif.bss_conf.mu_group.position));
2318 changed |= BSS_CHANGED_MU_GROUPS;
2319 sdata->vif.mu_mimo_owner = false;
2320
2321 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2322
2323 del_timer_sync(&local->dynamic_ps_timer);
2324 cancel_work_sync(&local->dynamic_ps_enable_work);
2325
2326 /* Disable ARP filtering */
2327 if (sdata->vif.bss_conf.arp_addr_cnt)
2328 changed |= BSS_CHANGED_ARP_FILTER;
2329
2330 sdata->vif.bss_conf.qos = false;
2331 changed |= BSS_CHANGED_QOS;
2332
2333 /* The BSSID (not really interesting) and HT changed */
2334 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2335 ieee80211_bss_info_change_notify(sdata, changed);
2336
2337 /* disassociated - set to defaults now */
2338 ieee80211_set_wmm_default(sdata, false, false);
2339
2340 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2341 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2342 del_timer_sync(&sdata->u.mgd.timer);
2343 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2344
2345 sdata->vif.bss_conf.dtim_period = 0;
2346 sdata->vif.bss_conf.beacon_rate = NULL;
2347
2348 ifmgd->have_beacon = false;
2349
2350 ifmgd->flags = 0;
2351 mutex_lock(&local->mtx);
2352 ieee80211_vif_release_channel(sdata);
2353
2354 sdata->vif.csa_active = false;
2355 ifmgd->csa_waiting_bcn = false;
2356 ifmgd->csa_ignored_same_chan = false;
2357 if (sdata->csa_block_tx) {
2358 ieee80211_wake_vif_queues(local, sdata,
2359 IEEE80211_QUEUE_STOP_REASON_CSA);
2360 sdata->csa_block_tx = false;
2361 }
2362 mutex_unlock(&local->mtx);
2363
2364 /* existing TX TSPEC sessions no longer exist */
2365 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2366 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2367
2368 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2369 }
2370
2371 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2372 struct ieee80211_hdr *hdr)
2373 {
2374 /*
2375 * We can postpone the mgd.timer whenever receiving unicast frames
2376 * from AP because we know that the connection is working both ways
2377 * at that time. But multicast frames (and hence also beacons) must
2378 * be ignored here, because we need to trigger the timer during
2379 * data idle periods for sending the periodic probe request to the
2380 * AP we're connected to.
2381 */
2382 if (is_multicast_ether_addr(hdr->addr1))
2383 return;
2384
2385 ieee80211_sta_reset_conn_monitor(sdata);
2386 }
2387
2388 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2389 {
2390 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2391 struct ieee80211_local *local = sdata->local;
2392
2393 mutex_lock(&local->mtx);
2394 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2395 goto out;
2396
2397 __ieee80211_stop_poll(sdata);
2398
2399 mutex_lock(&local->iflist_mtx);
2400 ieee80211_recalc_ps(local);
2401 mutex_unlock(&local->iflist_mtx);
2402
2403 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2404 goto out;
2405
2406 /*
2407 * We've received a probe response, but are not sure whether
2408 * we have or will be receiving any beacons or data, so let's
2409 * schedule the timers again, just in case.
2410 */
2411 ieee80211_sta_reset_beacon_monitor(sdata);
2412
2413 mod_timer(&ifmgd->conn_mon_timer,
2414 round_jiffies_up(jiffies +
2415 IEEE80211_CONNECTION_IDLE_TIME));
2416 out:
2417 mutex_unlock(&local->mtx);
2418 }
2419
2420 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2421 struct ieee80211_hdr *hdr,
2422 u16 tx_time)
2423 {
2424 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2425 u16 tid = ieee80211_get_tid(hdr);
2426 int ac = ieee80211_ac_from_tid(tid);
2427 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2428 unsigned long now = jiffies;
2429
2430 if (likely(!tx_tspec->admitted_time))
2431 return;
2432
2433 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2434 tx_tspec->consumed_tx_time = 0;
2435 tx_tspec->time_slice_start = now;
2436
2437 if (tx_tspec->downgraded) {
2438 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2439 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2440 }
2441 }
2442
2443 if (tx_tspec->downgraded)
2444 return;
2445
2446 tx_tspec->consumed_tx_time += tx_time;
2447
2448 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2449 tx_tspec->downgraded = true;
2450 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2451 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2452 }
2453 }
2454
2455 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2456 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2457 {
2458 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2459
2460 if (!ieee80211_is_data(hdr->frame_control))
2461 return;
2462
2463 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2464 sdata->u.mgd.probe_send_count > 0) {
2465 if (ack)
2466 ieee80211_sta_reset_conn_monitor(sdata);
2467 else
2468 sdata->u.mgd.nullfunc_failed = true;
2469 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2470 return;
2471 }
2472
2473 if (ack)
2474 ieee80211_sta_reset_conn_monitor(sdata);
2475 }
2476
2477 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
2478 const u8 *src, const u8 *dst,
2479 const u8 *ssid, size_t ssid_len,
2480 struct ieee80211_channel *channel)
2481 {
2482 struct sk_buff *skb;
2483
2484 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
2485 ssid, ssid_len, NULL, 0,
2486 IEEE80211_PROBE_FLAG_DIRECTED);
2487 if (skb)
2488 ieee80211_tx_skb(sdata, skb);
2489 }
2490
2491 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2492 {
2493 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2494 const u8 *ssid;
2495 u8 *dst = ifmgd->associated->bssid;
2496 u8 unicast_limit = max(1, max_probe_tries - 3);
2497 struct sta_info *sta;
2498
2499 /*
2500 * Try sending broadcast probe requests for the last three
2501 * probe requests after the first ones failed since some
2502 * buggy APs only support broadcast probe requests.
2503 */
2504 if (ifmgd->probe_send_count >= unicast_limit)
2505 dst = NULL;
2506
2507 /*
2508 * When the hardware reports an accurate Tx ACK status, it's
2509 * better to send a nullfunc frame instead of a probe request,
2510 * as it will kick us off the AP quickly if we aren't associated
2511 * anymore. The timeout will be reset if the frame is ACKed by
2512 * the AP.
2513 */
2514 ifmgd->probe_send_count++;
2515
2516 if (dst) {
2517 mutex_lock(&sdata->local->sta_mtx);
2518 sta = sta_info_get(sdata, dst);
2519 if (!WARN_ON(!sta))
2520 ieee80211_check_fast_rx(sta);
2521 mutex_unlock(&sdata->local->sta_mtx);
2522 }
2523
2524 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2525 ifmgd->nullfunc_failed = false;
2526 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
2527 ifmgd->probe_send_count--;
2528 else
2529 ieee80211_send_nullfunc(sdata->local, sdata, false);
2530 } else {
2531 int ssid_len;
2532
2533 rcu_read_lock();
2534 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2535 if (WARN_ON_ONCE(ssid == NULL))
2536 ssid_len = 0;
2537 else
2538 ssid_len = ssid[1];
2539
2540 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
2541 ssid + 2, ssid_len,
2542 ifmgd->associated->channel);
2543 rcu_read_unlock();
2544 }
2545
2546 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2547 run_again(sdata, ifmgd->probe_timeout);
2548 }
2549
2550 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2551 bool beacon)
2552 {
2553 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2554 bool already = false;
2555
2556 if (!ieee80211_sdata_running(sdata))
2557 return;
2558
2559 sdata_lock(sdata);
2560
2561 if (!ifmgd->associated)
2562 goto out;
2563
2564 mutex_lock(&sdata->local->mtx);
2565
2566 if (sdata->local->tmp_channel || sdata->local->scanning) {
2567 mutex_unlock(&sdata->local->mtx);
2568 goto out;
2569 }
2570
2571 if (beacon) {
2572 mlme_dbg_ratelimited(sdata,
2573 "detected beacon loss from AP (missed %d beacons) - probing\n",
2574 beacon_loss_count);
2575
2576 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2577 }
2578
2579 /*
2580 * The driver/our work has already reported this event or the
2581 * connection monitoring has kicked in and we have already sent
2582 * a probe request. Or maybe the AP died and the driver keeps
2583 * reporting until we disassociate...
2584 *
2585 * In either case we have to ignore the current call to this
2586 * function (except for setting the correct probe reason bit)
2587 * because otherwise we would reset the timer every time and
2588 * never check whether we received a probe response!
2589 */
2590 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2591 already = true;
2592
2593 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2594
2595 mutex_unlock(&sdata->local->mtx);
2596
2597 if (already)
2598 goto out;
2599
2600 mutex_lock(&sdata->local->iflist_mtx);
2601 ieee80211_recalc_ps(sdata->local);
2602 mutex_unlock(&sdata->local->iflist_mtx);
2603
2604 ifmgd->probe_send_count = 0;
2605 ieee80211_mgd_probe_ap_send(sdata);
2606 out:
2607 sdata_unlock(sdata);
2608 }
2609
2610 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2611 struct ieee80211_vif *vif)
2612 {
2613 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2614 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2615 struct cfg80211_bss *cbss;
2616 struct sk_buff *skb;
2617 const u8 *ssid;
2618 int ssid_len;
2619
2620 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2621 return NULL;
2622
2623 sdata_assert_lock(sdata);
2624
2625 if (ifmgd->associated)
2626 cbss = ifmgd->associated;
2627 else if (ifmgd->auth_data)
2628 cbss = ifmgd->auth_data->bss;
2629 else if (ifmgd->assoc_data)
2630 cbss = ifmgd->assoc_data->bss;
2631 else
2632 return NULL;
2633
2634 rcu_read_lock();
2635 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2636 if (WARN_ONCE(!ssid || ssid[1] > IEEE80211_MAX_SSID_LEN,
2637 "invalid SSID element (len=%d)", ssid ? ssid[1] : -1))
2638 ssid_len = 0;
2639 else
2640 ssid_len = ssid[1];
2641
2642 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2643 (u32) -1, cbss->channel,
2644 ssid + 2, ssid_len,
2645 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
2646 rcu_read_unlock();
2647
2648 return skb;
2649 }
2650 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2651
2652 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2653 const u8 *buf, size_t len, bool tx,
2654 u16 reason)
2655 {
2656 struct ieee80211_event event = {
2657 .type = MLME_EVENT,
2658 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2659 .u.mlme.reason = reason,
2660 };
2661
2662 if (tx)
2663 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2664 else
2665 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2666
2667 drv_event_callback(sdata->local, sdata, &event);
2668 }
2669
2670 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2671 {
2672 struct ieee80211_local *local = sdata->local;
2673 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2674 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2675 bool tx;
2676
2677 sdata_lock(sdata);
2678 if (!ifmgd->associated) {
2679 sdata_unlock(sdata);
2680 return;
2681 }
2682
2683 tx = !sdata->csa_block_tx;
2684
2685 /* AP is probably out of range (or not reachable for another reason) so
2686 * remove the bss struct for that AP.
2687 */
2688 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2689
2690 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2691 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2692 tx, frame_buf);
2693 mutex_lock(&local->mtx);
2694 sdata->vif.csa_active = false;
2695 ifmgd->csa_waiting_bcn = false;
2696 if (sdata->csa_block_tx) {
2697 ieee80211_wake_vif_queues(local, sdata,
2698 IEEE80211_QUEUE_STOP_REASON_CSA);
2699 sdata->csa_block_tx = false;
2700 }
2701 mutex_unlock(&local->mtx);
2702
2703 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
2704 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2705
2706 sdata_unlock(sdata);
2707 }
2708
2709 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2710 {
2711 struct ieee80211_sub_if_data *sdata =
2712 container_of(work, struct ieee80211_sub_if_data,
2713 u.mgd.beacon_connection_loss_work);
2714 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2715
2716 if (ifmgd->associated)
2717 ifmgd->beacon_loss_count++;
2718
2719 if (ifmgd->connection_loss) {
2720 sdata_info(sdata, "Connection to AP %pM lost\n",
2721 ifmgd->bssid);
2722 __ieee80211_disconnect(sdata);
2723 } else {
2724 ieee80211_mgd_probe_ap(sdata, true);
2725 }
2726 }
2727
2728 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2729 {
2730 struct ieee80211_sub_if_data *sdata =
2731 container_of(work, struct ieee80211_sub_if_data,
2732 u.mgd.csa_connection_drop_work);
2733
2734 __ieee80211_disconnect(sdata);
2735 }
2736
2737 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2738 {
2739 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2740 struct ieee80211_hw *hw = &sdata->local->hw;
2741
2742 trace_api_beacon_loss(sdata);
2743
2744 sdata->u.mgd.connection_loss = false;
2745 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2746 }
2747 EXPORT_SYMBOL(ieee80211_beacon_loss);
2748
2749 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2750 {
2751 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2752 struct ieee80211_hw *hw = &sdata->local->hw;
2753
2754 trace_api_connection_loss(sdata);
2755
2756 sdata->u.mgd.connection_loss = true;
2757 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2758 }
2759 EXPORT_SYMBOL(ieee80211_connection_loss);
2760
2761
2762 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2763 bool assoc)
2764 {
2765 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2766
2767 sdata_assert_lock(sdata);
2768
2769 if (!assoc) {
2770 /*
2771 * we are not authenticated yet, the only timer that could be
2772 * running is the timeout for the authentication response which
2773 * which is not relevant anymore.
2774 */
2775 del_timer_sync(&sdata->u.mgd.timer);
2776 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2777
2778 eth_zero_addr(sdata->u.mgd.bssid);
2779 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2780 sdata->u.mgd.flags = 0;
2781 mutex_lock(&sdata->local->mtx);
2782 ieee80211_vif_release_channel(sdata);
2783 mutex_unlock(&sdata->local->mtx);
2784 }
2785
2786 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2787 kfree(auth_data);
2788 sdata->u.mgd.auth_data = NULL;
2789 }
2790
2791 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2792 bool assoc, bool abandon)
2793 {
2794 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2795
2796 sdata_assert_lock(sdata);
2797
2798 if (!assoc) {
2799 /*
2800 * we are not associated yet, the only timer that could be
2801 * running is the timeout for the association response which
2802 * which is not relevant anymore.
2803 */
2804 del_timer_sync(&sdata->u.mgd.timer);
2805 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2806
2807 eth_zero_addr(sdata->u.mgd.bssid);
2808 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2809 sdata->u.mgd.flags = 0;
2810 sdata->vif.mu_mimo_owner = false;
2811
2812 mutex_lock(&sdata->local->mtx);
2813 ieee80211_vif_release_channel(sdata);
2814 mutex_unlock(&sdata->local->mtx);
2815
2816 if (abandon)
2817 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2818 }
2819
2820 kfree(assoc_data);
2821 sdata->u.mgd.assoc_data = NULL;
2822 }
2823
2824 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2825 struct ieee80211_mgmt *mgmt, size_t len)
2826 {
2827 struct ieee80211_local *local = sdata->local;
2828 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2829 u8 *pos;
2830 struct ieee802_11_elems elems;
2831 u32 tx_flags = 0;
2832
2833 pos = mgmt->u.auth.variable;
2834 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
2835 mgmt->bssid, auth_data->bss->bssid);
2836 if (!elems.challenge)
2837 return;
2838 auth_data->expected_transaction = 4;
2839 drv_mgd_prepare_tx(sdata->local, sdata, 0);
2840 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2841 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2842 IEEE80211_TX_INTFL_MLME_CONN_TX;
2843 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2844 elems.challenge - 2, elems.challenge_len + 2,
2845 auth_data->bss->bssid, auth_data->bss->bssid,
2846 auth_data->key, auth_data->key_len,
2847 auth_data->key_idx, tx_flags);
2848 }
2849
2850 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata,
2851 const u8 *bssid)
2852 {
2853 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2854 struct sta_info *sta;
2855 bool result = true;
2856
2857 sdata_info(sdata, "authenticated\n");
2858 ifmgd->auth_data->done = true;
2859 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2860 ifmgd->auth_data->timeout_started = true;
2861 run_again(sdata, ifmgd->auth_data->timeout);
2862
2863 /* move station state to auth */
2864 mutex_lock(&sdata->local->sta_mtx);
2865 sta = sta_info_get(sdata, bssid);
2866 if (!sta) {
2867 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2868 result = false;
2869 goto out;
2870 }
2871 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2872 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2873 result = false;
2874 goto out;
2875 }
2876
2877 out:
2878 mutex_unlock(&sdata->local->sta_mtx);
2879 return result;
2880 }
2881
2882 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2883 struct ieee80211_mgmt *mgmt, size_t len)
2884 {
2885 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2886 u8 bssid[ETH_ALEN];
2887 u16 auth_alg, auth_transaction, status_code;
2888 struct ieee80211_event event = {
2889 .type = MLME_EVENT,
2890 .u.mlme.data = AUTH_EVENT,
2891 };
2892
2893 sdata_assert_lock(sdata);
2894
2895 if (len < 24 + 6)
2896 return;
2897
2898 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2899 return;
2900
2901 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2902
2903 if (!ether_addr_equal(bssid, mgmt->bssid))
2904 return;
2905
2906 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2907 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2908 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2909
2910 if (auth_alg != ifmgd->auth_data->algorithm ||
2911 (auth_alg != WLAN_AUTH_SAE &&
2912 auth_transaction != ifmgd->auth_data->expected_transaction) ||
2913 (auth_alg == WLAN_AUTH_SAE &&
2914 (auth_transaction < ifmgd->auth_data->expected_transaction ||
2915 auth_transaction > 2))) {
2916 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2917 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2918 auth_transaction,
2919 ifmgd->auth_data->expected_transaction);
2920 return;
2921 }
2922
2923 if (status_code != WLAN_STATUS_SUCCESS) {
2924 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2925 mgmt->sa, status_code);
2926 ieee80211_destroy_auth_data(sdata, false);
2927 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2928 event.u.mlme.status = MLME_DENIED;
2929 event.u.mlme.reason = status_code;
2930 drv_event_callback(sdata->local, sdata, &event);
2931 return;
2932 }
2933
2934 switch (ifmgd->auth_data->algorithm) {
2935 case WLAN_AUTH_OPEN:
2936 case WLAN_AUTH_LEAP:
2937 case WLAN_AUTH_FT:
2938 case WLAN_AUTH_SAE:
2939 case WLAN_AUTH_FILS_SK:
2940 case WLAN_AUTH_FILS_SK_PFS:
2941 case WLAN_AUTH_FILS_PK:
2942 break;
2943 case WLAN_AUTH_SHARED_KEY:
2944 if (ifmgd->auth_data->expected_transaction != 4) {
2945 ieee80211_auth_challenge(sdata, mgmt, len);
2946 /* need another frame */
2947 return;
2948 }
2949 break;
2950 default:
2951 WARN_ONCE(1, "invalid auth alg %d",
2952 ifmgd->auth_data->algorithm);
2953 return;
2954 }
2955
2956 event.u.mlme.status = MLME_SUCCESS;
2957 drv_event_callback(sdata->local, sdata, &event);
2958 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
2959 (auth_transaction == 2 &&
2960 ifmgd->auth_data->expected_transaction == 2)) {
2961 if (!ieee80211_mark_sta_auth(sdata, bssid))
2962 goto out_err;
2963 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2964 auth_transaction == 2) {
2965 sdata_info(sdata, "SAE peer confirmed\n");
2966 ifmgd->auth_data->peer_confirmed = true;
2967 }
2968
2969 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2970 return;
2971 out_err:
2972 mutex_unlock(&sdata->local->sta_mtx);
2973 /* ignore frame -- wait for timeout */
2974 }
2975
2976 #define case_WLAN(type) \
2977 case WLAN_REASON_##type: return #type
2978
2979 const char *ieee80211_get_reason_code_string(u16 reason_code)
2980 {
2981 switch (reason_code) {
2982 case_WLAN(UNSPECIFIED);
2983 case_WLAN(PREV_AUTH_NOT_VALID);
2984 case_WLAN(DEAUTH_LEAVING);
2985 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2986 case_WLAN(DISASSOC_AP_BUSY);
2987 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2988 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2989 case_WLAN(DISASSOC_STA_HAS_LEFT);
2990 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2991 case_WLAN(DISASSOC_BAD_POWER);
2992 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2993 case_WLAN(INVALID_IE);
2994 case_WLAN(MIC_FAILURE);
2995 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2996 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2997 case_WLAN(IE_DIFFERENT);
2998 case_WLAN(INVALID_GROUP_CIPHER);
2999 case_WLAN(INVALID_PAIRWISE_CIPHER);
3000 case_WLAN(INVALID_AKMP);
3001 case_WLAN(UNSUPP_RSN_VERSION);
3002 case_WLAN(INVALID_RSN_IE_CAP);
3003 case_WLAN(IEEE8021X_FAILED);
3004 case_WLAN(CIPHER_SUITE_REJECTED);
3005 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
3006 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
3007 case_WLAN(DISASSOC_LOW_ACK);
3008 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
3009 case_WLAN(QSTA_LEAVE_QBSS);
3010 case_WLAN(QSTA_NOT_USE);
3011 case_WLAN(QSTA_REQUIRE_SETUP);
3012 case_WLAN(QSTA_TIMEOUT);
3013 case_WLAN(QSTA_CIPHER_NOT_SUPP);
3014 case_WLAN(MESH_PEER_CANCELED);
3015 case_WLAN(MESH_MAX_PEERS);
3016 case_WLAN(MESH_CONFIG);
3017 case_WLAN(MESH_CLOSE);
3018 case_WLAN(MESH_MAX_RETRIES);
3019 case_WLAN(MESH_CONFIRM_TIMEOUT);
3020 case_WLAN(MESH_INVALID_GTK);
3021 case_WLAN(MESH_INCONSISTENT_PARAM);
3022 case_WLAN(MESH_INVALID_SECURITY);
3023 case_WLAN(MESH_PATH_ERROR);
3024 case_WLAN(MESH_PATH_NOFORWARD);
3025 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
3026 case_WLAN(MAC_EXISTS_IN_MBSS);
3027 case_WLAN(MESH_CHAN_REGULATORY);
3028 case_WLAN(MESH_CHAN);
3029 default: return "<unknown>";
3030 }
3031 }
3032
3033 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
3034 struct ieee80211_mgmt *mgmt, size_t len)
3035 {
3036 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3037 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
3038
3039 sdata_assert_lock(sdata);
3040
3041 if (len < 24 + 2)
3042 return;
3043
3044 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3045 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3046 return;
3047 }
3048
3049 if (ifmgd->associated &&
3050 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
3051 const u8 *bssid = ifmgd->associated->bssid;
3052
3053 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
3054 bssid, reason_code,
3055 ieee80211_get_reason_code_string(reason_code));
3056
3057 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3058
3059 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
3060 reason_code);
3061 return;
3062 }
3063
3064 if (ifmgd->assoc_data &&
3065 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3066 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
3067
3068 sdata_info(sdata,
3069 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
3070 bssid, reason_code,
3071 ieee80211_get_reason_code_string(reason_code));
3072
3073 ieee80211_destroy_assoc_data(sdata, false, true);
3074
3075 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3076 return;
3077 }
3078 }
3079
3080
3081 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
3082 struct ieee80211_mgmt *mgmt, size_t len)
3083 {
3084 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3085 u16 reason_code;
3086
3087 sdata_assert_lock(sdata);
3088
3089 if (len < 24 + 2)
3090 return;
3091
3092 if (!ifmgd->associated ||
3093 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3094 return;
3095
3096 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
3097
3098 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3099 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3100 return;
3101 }
3102
3103 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
3104 mgmt->sa, reason_code,
3105 ieee80211_get_reason_code_string(reason_code));
3106
3107 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3108
3109 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
3110 }
3111
3112 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
3113 u8 *supp_rates, unsigned int supp_rates_len,
3114 u32 *rates, u32 *basic_rates,
3115 bool *have_higher_than_11mbit,
3116 int *min_rate, int *min_rate_index,
3117 int shift)
3118 {
3119 int i, j;
3120
3121 for (i = 0; i < supp_rates_len; i++) {
3122 int rate = supp_rates[i] & 0x7f;
3123 bool is_basic = !!(supp_rates[i] & 0x80);
3124
3125 if ((rate * 5 * (1 << shift)) > 110)
3126 *have_higher_than_11mbit = true;
3127
3128 /*
3129 * Skip HT and VHT BSS membership selectors since they're not
3130 * rates.
3131 *
3132 * Note: Even though the membership selector and the basic
3133 * rate flag share the same bit, they are not exactly
3134 * the same.
3135 */
3136 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3137 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
3138 continue;
3139
3140 for (j = 0; j < sband->n_bitrates; j++) {
3141 struct ieee80211_rate *br;
3142 int brate;
3143
3144 br = &sband->bitrates[j];
3145
3146 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3147 if (brate == rate) {
3148 *rates |= BIT(j);
3149 if (is_basic)
3150 *basic_rates |= BIT(j);
3151 if ((rate * 5) < *min_rate) {
3152 *min_rate = rate * 5;
3153 *min_rate_index = j;
3154 }
3155 break;
3156 }
3157 }
3158 }
3159 }
3160
3161 static bool ieee80211_twt_req_supported(const struct sta_info *sta,
3162 const struct ieee802_11_elems *elems)
3163 {
3164 if (elems->ext_capab_len < 10)
3165 return false;
3166
3167 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
3168 return false;
3169
3170 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] &
3171 IEEE80211_HE_MAC_CAP0_TWT_RES;
3172 }
3173
3174 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata,
3175 struct sta_info *sta,
3176 struct ieee802_11_elems *elems)
3177 {
3178 bool twt = ieee80211_twt_req_supported(sta, elems);
3179
3180 if (sdata->vif.bss_conf.twt_requester != twt) {
3181 sdata->vif.bss_conf.twt_requester = twt;
3182 return BSS_CHANGED_TWT;
3183 }
3184 return 0;
3185 }
3186
3187 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
3188 struct cfg80211_bss *cbss,
3189 struct ieee80211_mgmt *mgmt, size_t len,
3190 struct ieee802_11_elems *elems)
3191 {
3192 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3193 struct ieee80211_local *local = sdata->local;
3194 struct ieee80211_supported_band *sband;
3195 struct sta_info *sta;
3196 u16 capab_info, aid;
3197 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3198 const struct cfg80211_bss_ies *bss_ies = NULL;
3199 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3200 u32 changed = 0;
3201 int err;
3202 bool ret;
3203
3204 /* AssocResp and ReassocResp have identical structure */
3205
3206 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3207 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3208
3209 /*
3210 * The 5 MSB of the AID field are reserved
3211 * (802.11-2016 9.4.1.8 AID field)
3212 */
3213 aid &= 0x7ff;
3214
3215 ifmgd->broken_ap = false;
3216
3217 if (aid == 0 || aid > IEEE80211_MAX_AID) {
3218 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
3219 aid);
3220 aid = 0;
3221 ifmgd->broken_ap = true;
3222 }
3223
3224 if (!elems->supp_rates) {
3225 sdata_info(sdata, "no SuppRates element in AssocResp\n");
3226 return false;
3227 }
3228
3229 ifmgd->aid = aid;
3230 ifmgd->tdls_chan_switch_prohibited =
3231 elems->ext_capab && elems->ext_capab_len >= 5 &&
3232 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3233
3234 /*
3235 * Some APs are erroneously not including some information in their
3236 * (re)association response frames. Try to recover by using the data
3237 * from the beacon or probe response. This seems to afflict mobile
3238 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
3239 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
3240 */
3241 if ((assoc_data->wmm && !elems->wmm_param) ||
3242 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3243 (!elems->ht_cap_elem || !elems->ht_operation)) ||
3244 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3245 (!elems->vht_cap_elem || !elems->vht_operation))) {
3246 const struct cfg80211_bss_ies *ies;
3247 struct ieee802_11_elems bss_elems;
3248
3249 rcu_read_lock();
3250 ies = rcu_dereference(cbss->ies);
3251 if (ies)
3252 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3253 GFP_ATOMIC);
3254 rcu_read_unlock();
3255 if (!bss_ies)
3256 return false;
3257
3258 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
3259 false, &bss_elems,
3260 mgmt->bssid,
3261 assoc_data->bss->bssid);
3262 if (assoc_data->wmm &&
3263 !elems->wmm_param && bss_elems.wmm_param) {
3264 elems->wmm_param = bss_elems.wmm_param;
3265 sdata_info(sdata,
3266 "AP bug: WMM param missing from AssocResp\n");
3267 }
3268
3269 /*
3270 * Also check if we requested HT/VHT, otherwise the AP doesn't
3271 * have to include the IEs in the (re)association response.
3272 */
3273 if (!elems->ht_cap_elem && bss_elems.ht_cap_elem &&
3274 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3275 elems->ht_cap_elem = bss_elems.ht_cap_elem;
3276 sdata_info(sdata,
3277 "AP bug: HT capability missing from AssocResp\n");
3278 }
3279 if (!elems->ht_operation && bss_elems.ht_operation &&
3280 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3281 elems->ht_operation = bss_elems.ht_operation;
3282 sdata_info(sdata,
3283 "AP bug: HT operation missing from AssocResp\n");
3284 }
3285 if (!elems->vht_cap_elem && bss_elems.vht_cap_elem &&
3286 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3287 elems->vht_cap_elem = bss_elems.vht_cap_elem;
3288 sdata_info(sdata,
3289 "AP bug: VHT capa missing from AssocResp\n");
3290 }
3291 if (!elems->vht_operation && bss_elems.vht_operation &&
3292 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3293 elems->vht_operation = bss_elems.vht_operation;
3294 sdata_info(sdata,
3295 "AP bug: VHT operation missing from AssocResp\n");
3296 }
3297 }
3298
3299 /*
3300 * We previously checked these in the beacon/probe response, so
3301 * they should be present here. This is just a safety net.
3302 */
3303 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3304 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) {
3305 sdata_info(sdata,
3306 "HT AP is missing WMM params or HT capability/operation\n");
3307 ret = false;
3308 goto out;
3309 }
3310
3311 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3312 (!elems->vht_cap_elem || !elems->vht_operation)) {
3313 sdata_info(sdata,
3314 "VHT AP is missing VHT capability/operation\n");
3315 ret = false;
3316 goto out;
3317 }
3318
3319 mutex_lock(&sdata->local->sta_mtx);
3320 /*
3321 * station info was already allocated and inserted before
3322 * the association and should be available to us
3323 */
3324 sta = sta_info_get(sdata, cbss->bssid);
3325 if (WARN_ON(!sta)) {
3326 mutex_unlock(&sdata->local->sta_mtx);
3327 ret = false;
3328 goto out;
3329 }
3330
3331 sband = ieee80211_get_sband(sdata);
3332 if (!sband) {
3333 mutex_unlock(&sdata->local->sta_mtx);
3334 ret = false;
3335 goto out;
3336 }
3337
3338 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3339 (!elems->he_cap || !elems->he_operation)) {
3340 mutex_unlock(&sdata->local->sta_mtx);
3341 sdata_info(sdata,
3342 "HE AP is missing HE capability/operation\n");
3343 ret = false;
3344 goto out;
3345 }
3346
3347 /* Set up internal HT/VHT capabilities */
3348 if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3349 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3350 elems->ht_cap_elem, sta);
3351
3352 if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3353 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3354 elems->vht_cap_elem, sta);
3355
3356 if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3357 elems->he_cap) {
3358 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
3359 elems->he_cap,
3360 elems->he_cap_len,
3361 sta);
3362
3363 bss_conf->he_support = sta->sta.he_cap.has_he;
3364 changed |= ieee80211_recalc_twt_req(sdata, sta, elems);
3365 } else {
3366 bss_conf->he_support = false;
3367 bss_conf->twt_requester = false;
3368 }
3369
3370 if (bss_conf->he_support) {
3371 bss_conf->bss_color =
3372 le32_get_bits(elems->he_operation->he_oper_params,
3373 IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
3374
3375 bss_conf->htc_trig_based_pkt_ext =
3376 le32_get_bits(elems->he_operation->he_oper_params,
3377 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
3378 bss_conf->frame_time_rts_th =
3379 le32_get_bits(elems->he_operation->he_oper_params,
3380 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3381
3382 bss_conf->multi_sta_back_32bit =
3383 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3384 IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP;
3385
3386 bss_conf->ack_enabled =
3387 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3388 IEEE80211_HE_MAC_CAP2_ACK_EN;
3389
3390 bss_conf->uora_exists = !!elems->uora_element;
3391 if (elems->uora_element)
3392 bss_conf->uora_ocw_range = elems->uora_element[0];
3393
3394 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation);
3395 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr);
3396 /* TODO: OPEN: what happens if BSS color disable is set? */
3397 }
3398
3399 if (cbss->transmitted_bss) {
3400 bss_conf->nontransmitted = true;
3401 ether_addr_copy(bss_conf->transmitter_bssid,
3402 cbss->transmitted_bss->bssid);
3403 bss_conf->bssid_indicator = cbss->max_bssid_indicator;
3404 bss_conf->bssid_index = cbss->bssid_index;
3405 }
3406
3407 /*
3408 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3409 * in their association response, so ignore that data for our own
3410 * configuration. If it changed since the last beacon, we'll get the
3411 * next beacon and update then.
3412 */
3413
3414 /*
3415 * If an operating mode notification IE is present, override the
3416 * NSS calculation (that would be done in rate_control_rate_init())
3417 * and use the # of streams from that element.
3418 */
3419 if (elems->opmode_notif &&
3420 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3421 u8 nss;
3422
3423 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3424 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3425 nss += 1;
3426 sta->sta.rx_nss = nss;
3427 }
3428
3429 rate_control_rate_init(sta);
3430
3431 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3432 set_sta_flag(sta, WLAN_STA_MFP);
3433 sta->sta.mfp = true;
3434 } else {
3435 sta->sta.mfp = false;
3436 }
3437
3438 sta->sta.wme = elems->wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3439
3440 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3441 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3442 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3443 if (err) {
3444 sdata_info(sdata,
3445 "failed to move station %pM to desired state\n",
3446 sta->sta.addr);
3447 WARN_ON(__sta_info_destroy(sta));
3448 mutex_unlock(&sdata->local->sta_mtx);
3449 ret = false;
3450 goto out;
3451 }
3452
3453 mutex_unlock(&sdata->local->sta_mtx);
3454
3455 /*
3456 * Always handle WMM once after association regardless
3457 * of the first value the AP uses. Setting -1 here has
3458 * that effect because the AP values is an unsigned
3459 * 4-bit value.
3460 */
3461 ifmgd->wmm_last_param_set = -1;
3462 ifmgd->mu_edca_last_param_set = -1;
3463
3464 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3465 ieee80211_set_wmm_default(sdata, false, false);
3466 } else if (!ieee80211_sta_wmm_params(local, sdata, elems->wmm_param,
3467 elems->wmm_param_len,
3468 elems->mu_edca_param_set)) {
3469 /* still enable QoS since we might have HT/VHT */
3470 ieee80211_set_wmm_default(sdata, false, true);
3471 /* set the disable-WMM flag in this case to disable
3472 * tracking WMM parameter changes in the beacon if
3473 * the parameters weren't actually valid. Doing so
3474 * avoids changing parameters very strangely when
3475 * the AP is going back and forth between valid and
3476 * invalid parameters.
3477 */
3478 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3479 }
3480 changed |= BSS_CHANGED_QOS;
3481
3482 if (elems->max_idle_period_ie) {
3483 bss_conf->max_idle_period =
3484 le16_to_cpu(elems->max_idle_period_ie->max_idle_period);
3485 bss_conf->protected_keep_alive =
3486 !!(elems->max_idle_period_ie->idle_options &
3487 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3488 changed |= BSS_CHANGED_KEEP_ALIVE;
3489 } else {
3490 bss_conf->max_idle_period = 0;
3491 bss_conf->protected_keep_alive = false;
3492 }
3493
3494 /* set AID and assoc capability,
3495 * ieee80211_set_associated() will tell the driver */
3496 bss_conf->aid = aid;
3497 bss_conf->assoc_capability = capab_info;
3498 ieee80211_set_associated(sdata, cbss, changed);
3499
3500 /*
3501 * If we're using 4-addr mode, let the AP know that we're
3502 * doing so, so that it can create the STA VLAN on its side
3503 */
3504 if (ifmgd->use_4addr)
3505 ieee80211_send_4addr_nullfunc(local, sdata);
3506
3507 /*
3508 * Start timer to probe the connection to the AP now.
3509 * Also start the timer that will detect beacon loss.
3510 */
3511 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3512 ieee80211_sta_reset_beacon_monitor(sdata);
3513
3514 ret = true;
3515 out:
3516 kfree(bss_ies);
3517 return ret;
3518 }
3519
3520 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3521 struct ieee80211_mgmt *mgmt,
3522 size_t len)
3523 {
3524 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3525 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3526 u16 capab_info, status_code, aid;
3527 struct ieee802_11_elems elems;
3528 int ac, uapsd_queues = -1;
3529 u8 *pos;
3530 bool reassoc;
3531 struct cfg80211_bss *bss;
3532 struct ieee80211_event event = {
3533 .type = MLME_EVENT,
3534 .u.mlme.data = ASSOC_EVENT,
3535 };
3536
3537 sdata_assert_lock(sdata);
3538
3539 if (!assoc_data)
3540 return;
3541 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3542 return;
3543
3544 /*
3545 * AssocResp and ReassocResp have identical structure, so process both
3546 * of them in this function.
3547 */
3548
3549 if (len < 24 + 6)
3550 return;
3551
3552 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
3553 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3554 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3555 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3556
3557 sdata_info(sdata,
3558 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3559 reassoc ? "Rea" : "A", mgmt->sa,
3560 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3561
3562 if (assoc_data->fils_kek_len &&
3563 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3564 return;
3565
3566 pos = mgmt->u.assoc_resp.variable;
3567 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
3568 mgmt->bssid, assoc_data->bss->bssid);
3569
3570 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3571 elems.timeout_int &&
3572 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3573 u32 tu, ms;
3574 tu = le32_to_cpu(elems.timeout_int->value);
3575 ms = tu * 1024 / 1000;
3576 sdata_info(sdata,
3577 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3578 mgmt->sa, tu, ms);
3579 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3580 assoc_data->timeout_started = true;
3581 if (ms > IEEE80211_ASSOC_TIMEOUT)
3582 run_again(sdata, assoc_data->timeout);
3583 return;
3584 }
3585
3586 bss = assoc_data->bss;
3587
3588 if (status_code != WLAN_STATUS_SUCCESS) {
3589 sdata_info(sdata, "%pM denied association (code=%d)\n",
3590 mgmt->sa, status_code);
3591 ieee80211_destroy_assoc_data(sdata, false, false);
3592 event.u.mlme.status = MLME_DENIED;
3593 event.u.mlme.reason = status_code;
3594 drv_event_callback(sdata->local, sdata, &event);
3595 } else {
3596 if (!ieee80211_assoc_success(sdata, bss, mgmt, len, &elems)) {
3597 /* oops -- internal error -- send timeout for now */
3598 ieee80211_destroy_assoc_data(sdata, false, false);
3599 cfg80211_assoc_timeout(sdata->dev, bss);
3600 return;
3601 }
3602 event.u.mlme.status = MLME_SUCCESS;
3603 drv_event_callback(sdata->local, sdata, &event);
3604 sdata_info(sdata, "associated\n");
3605
3606 /*
3607 * destroy assoc_data afterwards, as otherwise an idle
3608 * recalc after assoc_data is NULL but before associated
3609 * is set can cause the interface to go idle
3610 */
3611 ieee80211_destroy_assoc_data(sdata, true, false);
3612
3613 /* get uapsd queues configuration */
3614 uapsd_queues = 0;
3615 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3616 if (sdata->tx_conf[ac].uapsd)
3617 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3618 }
3619
3620 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues,
3621 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len);
3622 }
3623
3624 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3625 struct ieee80211_mgmt *mgmt, size_t len,
3626 struct ieee80211_rx_status *rx_status)
3627 {
3628 struct ieee80211_local *local = sdata->local;
3629 struct ieee80211_bss *bss;
3630 struct ieee80211_channel *channel;
3631
3632 sdata_assert_lock(sdata);
3633
3634 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3635 if (!channel)
3636 return;
3637
3638 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
3639 if (bss) {
3640 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3641 ieee80211_rx_bss_put(local, bss);
3642 }
3643 }
3644
3645
3646 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3647 struct sk_buff *skb)
3648 {
3649 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3650 struct ieee80211_if_managed *ifmgd;
3651 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3652 size_t baselen, len = skb->len;
3653
3654 ifmgd = &sdata->u.mgd;
3655
3656 sdata_assert_lock(sdata);
3657
3658 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3659 return; /* ignore ProbeResp to foreign address */
3660
3661 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3662 if (baselen > len)
3663 return;
3664
3665 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3666
3667 if (ifmgd->associated &&
3668 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3669 ieee80211_reset_ap_probe(sdata);
3670 }
3671
3672 /*
3673 * This is the canonical list of information elements we care about,
3674 * the filter code also gives us all changes to the Microsoft OUI
3675 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3676 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3677 * changes to requested client power.
3678 *
3679 * We implement beacon filtering in software since that means we can
3680 * avoid processing the frame here and in cfg80211, and userspace
3681 * will not be able to tell whether the hardware supports it or not.
3682 *
3683 * XXX: This list needs to be dynamic -- userspace needs to be able to
3684 * add items it requires. It also needs to be able to tell us to
3685 * look out for other vendor IEs.
3686 */
3687 static const u64 care_about_ies =
3688 (1ULL << WLAN_EID_COUNTRY) |
3689 (1ULL << WLAN_EID_ERP_INFO) |
3690 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3691 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3692 (1ULL << WLAN_EID_HT_CAPABILITY) |
3693 (1ULL << WLAN_EID_HT_OPERATION) |
3694 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3695
3696 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata,
3697 struct ieee80211_if_managed *ifmgd,
3698 struct ieee80211_bss_conf *bss_conf,
3699 struct ieee80211_local *local,
3700 struct ieee80211_rx_status *rx_status)
3701 {
3702 /* Track average RSSI from the Beacon frames of the current AP */
3703
3704 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3705 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3706 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3707 ifmgd->last_cqm_event_signal = 0;
3708 ifmgd->count_beacon_signal = 1;
3709 ifmgd->last_ave_beacon_signal = 0;
3710 } else {
3711 ifmgd->count_beacon_signal++;
3712 }
3713
3714 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3715
3716 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3717 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3718 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3719 int last_sig = ifmgd->last_ave_beacon_signal;
3720 struct ieee80211_event event = {
3721 .type = RSSI_EVENT,
3722 };
3723
3724 /*
3725 * if signal crosses either of the boundaries, invoke callback
3726 * with appropriate parameters
3727 */
3728 if (sig > ifmgd->rssi_max_thold &&
3729 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3730 ifmgd->last_ave_beacon_signal = sig;
3731 event.u.rssi.data = RSSI_EVENT_HIGH;
3732 drv_event_callback(local, sdata, &event);
3733 } else if (sig < ifmgd->rssi_min_thold &&
3734 (last_sig >= ifmgd->rssi_max_thold ||
3735 last_sig == 0)) {
3736 ifmgd->last_ave_beacon_signal = sig;
3737 event.u.rssi.data = RSSI_EVENT_LOW;
3738 drv_event_callback(local, sdata, &event);
3739 }
3740 }
3741
3742 if (bss_conf->cqm_rssi_thold &&
3743 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3744 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3745 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3746 int last_event = ifmgd->last_cqm_event_signal;
3747 int thold = bss_conf->cqm_rssi_thold;
3748 int hyst = bss_conf->cqm_rssi_hyst;
3749
3750 if (sig < thold &&
3751 (last_event == 0 || sig < last_event - hyst)) {
3752 ifmgd->last_cqm_event_signal = sig;
3753 ieee80211_cqm_rssi_notify(
3754 &sdata->vif,
3755 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3756 sig, GFP_KERNEL);
3757 } else if (sig > thold &&
3758 (last_event == 0 || sig > last_event + hyst)) {
3759 ifmgd->last_cqm_event_signal = sig;
3760 ieee80211_cqm_rssi_notify(
3761 &sdata->vif,
3762 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3763 sig, GFP_KERNEL);
3764 }
3765 }
3766
3767 if (bss_conf->cqm_rssi_low &&
3768 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3769 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3770 int last_event = ifmgd->last_cqm_event_signal;
3771 int low = bss_conf->cqm_rssi_low;
3772 int high = bss_conf->cqm_rssi_high;
3773
3774 if (sig < low &&
3775 (last_event == 0 || last_event >= low)) {
3776 ifmgd->last_cqm_event_signal = sig;
3777 ieee80211_cqm_rssi_notify(
3778 &sdata->vif,
3779 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3780 sig, GFP_KERNEL);
3781 } else if (sig > high &&
3782 (last_event == 0 || last_event <= high)) {
3783 ifmgd->last_cqm_event_signal = sig;
3784 ieee80211_cqm_rssi_notify(
3785 &sdata->vif,
3786 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3787 sig, GFP_KERNEL);
3788 }
3789 }
3790 }
3791
3792 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
3793 struct cfg80211_bss *bss)
3794 {
3795 if (ether_addr_equal(tx_bssid, bss->bssid))
3796 return true;
3797 if (!bss->transmitted_bss)
3798 return false;
3799 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid);
3800 }
3801
3802 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3803 struct ieee80211_mgmt *mgmt, size_t len,
3804 struct ieee80211_rx_status *rx_status)
3805 {
3806 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3807 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3808 size_t baselen;
3809 struct ieee802_11_elems elems;
3810 struct ieee80211_local *local = sdata->local;
3811 struct ieee80211_chanctx_conf *chanctx_conf;
3812 struct ieee80211_channel *chan;
3813 struct sta_info *sta;
3814 u32 changed = 0;
3815 bool erp_valid;
3816 u8 erp_value = 0;
3817 u32 ncrc;
3818 u8 *bssid;
3819 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3820
3821 sdata_assert_lock(sdata);
3822
3823 /* Process beacon from the current BSS */
3824 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3825 if (baselen > len)
3826 return;
3827
3828 rcu_read_lock();
3829 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3830 if (!chanctx_conf) {
3831 rcu_read_unlock();
3832 return;
3833 }
3834
3835 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3836 rcu_read_unlock();
3837 return;
3838 }
3839 chan = chanctx_conf->def.chan;
3840 rcu_read_unlock();
3841
3842 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3843 ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->assoc_data->bss)) {
3844 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3845 len - baselen, false, &elems,
3846 mgmt->bssid,
3847 ifmgd->assoc_data->bss->bssid);
3848
3849 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3850
3851 if (elems.dtim_period)
3852 ifmgd->dtim_period = elems.dtim_period;
3853 ifmgd->have_beacon = true;
3854 ifmgd->assoc_data->need_beacon = false;
3855 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3856 sdata->vif.bss_conf.sync_tsf =
3857 le64_to_cpu(mgmt->u.beacon.timestamp);
3858 sdata->vif.bss_conf.sync_device_ts =
3859 rx_status->device_timestamp;
3860 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
3861 }
3862
3863 if (elems.mbssid_config_ie)
3864 bss_conf->profile_periodicity =
3865 elems.mbssid_config_ie->profile_periodicity;
3866
3867 if (elems.ext_capab_len >= 11 &&
3868 (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
3869 bss_conf->ema_ap = true;
3870
3871 /* continue assoc process */
3872 ifmgd->assoc_data->timeout = jiffies;
3873 ifmgd->assoc_data->timeout_started = true;
3874 run_again(sdata, ifmgd->assoc_data->timeout);
3875 return;
3876 }
3877
3878 if (!ifmgd->associated ||
3879 !ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->associated))
3880 return;
3881 bssid = ifmgd->associated->bssid;
3882
3883 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
3884 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf,
3885 local, rx_status);
3886
3887 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3888 mlme_dbg_ratelimited(sdata,
3889 "cancelling AP probe due to a received beacon\n");
3890 ieee80211_reset_ap_probe(sdata);
3891 }
3892
3893 /*
3894 * Push the beacon loss detection into the future since
3895 * we are processing a beacon from the AP just now.
3896 */
3897 ieee80211_sta_reset_beacon_monitor(sdata);
3898
3899 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3900 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3901 len - baselen, false, &elems,
3902 care_about_ies, ncrc,
3903 mgmt->bssid, bssid);
3904
3905 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3906 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3907 if (local->hw.conf.dynamic_ps_timeout > 0) {
3908 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3909 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3910 ieee80211_hw_config(local,
3911 IEEE80211_CONF_CHANGE_PS);
3912 }
3913 ieee80211_send_nullfunc(local, sdata, false);
3914 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3915 local->pspolling = true;
3916
3917 /*
3918 * Here is assumed that the driver will be
3919 * able to send ps-poll frame and receive a
3920 * response even though power save mode is
3921 * enabled, but some drivers might require
3922 * to disable power save here. This needs
3923 * to be investigated.
3924 */
3925 ieee80211_send_pspoll(local, sdata);
3926 }
3927 }
3928
3929 if (sdata->vif.p2p ||
3930 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3931 struct ieee80211_p2p_noa_attr noa = {};
3932 int ret;
3933
3934 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3935 len - baselen,
3936 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3937 (u8 *) &noa, sizeof(noa));
3938 if (ret >= 2) {
3939 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3940 /* valid noa_attr and index changed */
3941 sdata->u.mgd.p2p_noa_index = noa.index;
3942 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3943 changed |= BSS_CHANGED_P2P_PS;
3944 /*
3945 * make sure we update all information, the CRC
3946 * mechanism doesn't look at P2P attributes.
3947 */
3948 ifmgd->beacon_crc_valid = false;
3949 }
3950 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3951 /* noa_attr not found and we had valid noa_attr before */
3952 sdata->u.mgd.p2p_noa_index = -1;
3953 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3954 changed |= BSS_CHANGED_P2P_PS;
3955 ifmgd->beacon_crc_valid = false;
3956 }
3957 }
3958
3959 if (ifmgd->csa_waiting_bcn)
3960 ieee80211_chswitch_post_beacon(sdata);
3961
3962 /*
3963 * Update beacon timing and dtim count on every beacon appearance. This
3964 * will allow the driver to use the most updated values. Do it before
3965 * comparing this one with last received beacon.
3966 * IMPORTANT: These parameters would possibly be out of sync by the time
3967 * the driver will use them. The synchronized view is currently
3968 * guaranteed only in certain callbacks.
3969 */
3970 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3971 sdata->vif.bss_conf.sync_tsf =
3972 le64_to_cpu(mgmt->u.beacon.timestamp);
3973 sdata->vif.bss_conf.sync_device_ts =
3974 rx_status->device_timestamp;
3975 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
3976 }
3977
3978 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3979 return;
3980 ifmgd->beacon_crc = ncrc;
3981 ifmgd->beacon_crc_valid = true;
3982
3983 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3984
3985 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3986 rx_status->device_timestamp,
3987 &elems, true);
3988
3989 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3990 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3991 elems.wmm_param_len,
3992 elems.mu_edca_param_set))
3993 changed |= BSS_CHANGED_QOS;
3994
3995 /*
3996 * If we haven't had a beacon before, tell the driver about the
3997 * DTIM period (and beacon timing if desired) now.
3998 */
3999 if (!ifmgd->have_beacon) {
4000 /* a few bogus AP send dtim_period = 0 or no TIM IE */
4001 bss_conf->dtim_period = elems.dtim_period ?: 1;
4002
4003 changed |= BSS_CHANGED_BEACON_INFO;
4004 ifmgd->have_beacon = true;
4005
4006 mutex_lock(&local->iflist_mtx);
4007 ieee80211_recalc_ps(local);
4008 mutex_unlock(&local->iflist_mtx);
4009
4010 ieee80211_recalc_ps_vif(sdata);
4011 }
4012
4013 if (elems.erp_info) {
4014 erp_valid = true;
4015 erp_value = elems.erp_info[0];
4016 } else {
4017 erp_valid = false;
4018 }
4019 changed |= ieee80211_handle_bss_capability(sdata,
4020 le16_to_cpu(mgmt->u.beacon.capab_info),
4021 erp_valid, erp_value);
4022
4023 mutex_lock(&local->sta_mtx);
4024 sta = sta_info_get(sdata, bssid);
4025
4026 changed |= ieee80211_recalc_twt_req(sdata, sta, &elems);
4027
4028 if (ieee80211_config_bw(sdata, sta,
4029 elems.ht_cap_elem, elems.ht_operation,
4030 elems.vht_operation, elems.he_operation,
4031 bssid, &changed)) {
4032 mutex_unlock(&local->sta_mtx);
4033 sdata_info(sdata,
4034 "failed to follow AP %pM bandwidth change, disconnect\n",
4035 bssid);
4036 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4037 WLAN_REASON_DEAUTH_LEAVING,
4038 true, deauth_buf);
4039 ieee80211_report_disconnect(sdata, deauth_buf,
4040 sizeof(deauth_buf), true,
4041 WLAN_REASON_DEAUTH_LEAVING);
4042 return;
4043 }
4044
4045 if (sta && elems.opmode_notif)
4046 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
4047 rx_status->band);
4048 mutex_unlock(&local->sta_mtx);
4049
4050 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
4051 elems.country_elem,
4052 elems.country_elem_len,
4053 elems.pwr_constr_elem,
4054 elems.cisco_dtpc_elem);
4055
4056 ieee80211_bss_info_change_notify(sdata, changed);
4057 }
4058
4059 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
4060 struct sk_buff *skb)
4061 {
4062 struct ieee80211_rx_status *rx_status;
4063 struct ieee80211_mgmt *mgmt;
4064 u16 fc;
4065 struct ieee802_11_elems elems;
4066 int ies_len;
4067
4068 rx_status = (struct ieee80211_rx_status *) skb->cb;
4069 mgmt = (struct ieee80211_mgmt *) skb->data;
4070 fc = le16_to_cpu(mgmt->frame_control);
4071
4072 sdata_lock(sdata);
4073
4074 switch (fc & IEEE80211_FCTL_STYPE) {
4075 case IEEE80211_STYPE_BEACON:
4076 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
4077 break;
4078 case IEEE80211_STYPE_PROBE_RESP:
4079 ieee80211_rx_mgmt_probe_resp(sdata, skb);
4080 break;
4081 case IEEE80211_STYPE_AUTH:
4082 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
4083 break;
4084 case IEEE80211_STYPE_DEAUTH:
4085 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
4086 break;
4087 case IEEE80211_STYPE_DISASSOC:
4088 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
4089 break;
4090 case IEEE80211_STYPE_ASSOC_RESP:
4091 case IEEE80211_STYPE_REASSOC_RESP:
4092 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
4093 break;
4094 case IEEE80211_STYPE_ACTION:
4095 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
4096 ies_len = skb->len -
4097 offsetof(struct ieee80211_mgmt,
4098 u.action.u.chan_switch.variable);
4099
4100 if (ies_len < 0)
4101 break;
4102
4103 /* CSA IE cannot be overridden, no need for BSSID */
4104 ieee802_11_parse_elems(
4105 mgmt->u.action.u.chan_switch.variable,
4106 ies_len, true, &elems, mgmt->bssid, NULL);
4107
4108 if (elems.parse_error)
4109 break;
4110
4111 ieee80211_sta_process_chanswitch(sdata,
4112 rx_status->mactime,
4113 rx_status->device_timestamp,
4114 &elems, false);
4115 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
4116 ies_len = skb->len -
4117 offsetof(struct ieee80211_mgmt,
4118 u.action.u.ext_chan_switch.variable);
4119
4120 if (ies_len < 0)
4121 break;
4122
4123 /*
4124 * extended CSA IE can't be overridden, no need for
4125 * BSSID
4126 */
4127 ieee802_11_parse_elems(
4128 mgmt->u.action.u.ext_chan_switch.variable,
4129 ies_len, true, &elems, mgmt->bssid, NULL);
4130
4131 if (elems.parse_error)
4132 break;
4133
4134 /* for the handling code pretend this was also an IE */
4135 elems.ext_chansw_ie =
4136 &mgmt->u.action.u.ext_chan_switch.data;
4137
4138 ieee80211_sta_process_chanswitch(sdata,
4139 rx_status->mactime,
4140 rx_status->device_timestamp,
4141 &elems, false);
4142 }
4143 break;
4144 }
4145 sdata_unlock(sdata);
4146 }
4147
4148 static void ieee80211_sta_timer(struct timer_list *t)
4149 {
4150 struct ieee80211_sub_if_data *sdata =
4151 from_timer(sdata, t, u.mgd.timer);
4152
4153 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4154 }
4155
4156 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
4157 u8 *bssid, u8 reason, bool tx)
4158 {
4159 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4160
4161 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
4162 tx, frame_buf);
4163
4164 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4165 reason);
4166 }
4167
4168 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
4169 {
4170 struct ieee80211_local *local = sdata->local;
4171 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4172 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
4173 u32 tx_flags = 0;
4174 u16 trans = 1;
4175 u16 status = 0;
4176 u16 prepare_tx_duration = 0;
4177
4178 sdata_assert_lock(sdata);
4179
4180 if (WARN_ON_ONCE(!auth_data))
4181 return -EINVAL;
4182
4183 auth_data->tries++;
4184
4185 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
4186 sdata_info(sdata, "authentication with %pM timed out\n",
4187 auth_data->bss->bssid);
4188
4189 /*
4190 * Most likely AP is not in the range so remove the
4191 * bss struct for that AP.
4192 */
4193 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
4194
4195 return -ETIMEDOUT;
4196 }
4197
4198 if (auth_data->algorithm == WLAN_AUTH_SAE)
4199 prepare_tx_duration =
4200 jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
4201
4202 drv_mgd_prepare_tx(local, sdata, prepare_tx_duration);
4203
4204 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
4205 auth_data->bss->bssid, auth_data->tries,
4206 IEEE80211_AUTH_MAX_TRIES);
4207
4208 auth_data->expected_transaction = 2;
4209
4210 if (auth_data->algorithm == WLAN_AUTH_SAE) {
4211 trans = auth_data->sae_trans;
4212 status = auth_data->sae_status;
4213 auth_data->expected_transaction = trans;
4214 }
4215
4216 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4217 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
4218 IEEE80211_TX_INTFL_MLME_CONN_TX;
4219
4220 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
4221 auth_data->data, auth_data->data_len,
4222 auth_data->bss->bssid,
4223 auth_data->bss->bssid, NULL, 0, 0,
4224 tx_flags);
4225
4226 if (tx_flags == 0) {
4227 if (auth_data->algorithm == WLAN_AUTH_SAE)
4228 auth_data->timeout = jiffies +
4229 IEEE80211_AUTH_TIMEOUT_SAE;
4230 else
4231 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
4232 } else {
4233 auth_data->timeout =
4234 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
4235 }
4236
4237 auth_data->timeout_started = true;
4238 run_again(sdata, auth_data->timeout);
4239
4240 return 0;
4241 }
4242
4243 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
4244 {
4245 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
4246 struct ieee80211_local *local = sdata->local;
4247
4248 sdata_assert_lock(sdata);
4249
4250 assoc_data->tries++;
4251 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
4252 sdata_info(sdata, "association with %pM timed out\n",
4253 assoc_data->bss->bssid);
4254
4255 /*
4256 * Most likely AP is not in the range so remove the
4257 * bss struct for that AP.
4258 */
4259 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
4260
4261 return -ETIMEDOUT;
4262 }
4263
4264 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
4265 assoc_data->bss->bssid, assoc_data->tries,
4266 IEEE80211_ASSOC_MAX_TRIES);
4267 ieee80211_send_assoc(sdata);
4268
4269 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4270 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
4271 assoc_data->timeout_started = true;
4272 run_again(sdata, assoc_data->timeout);
4273 } else {
4274 assoc_data->timeout =
4275 round_jiffies_up(jiffies +
4276 IEEE80211_ASSOC_TIMEOUT_LONG);
4277 assoc_data->timeout_started = true;
4278 run_again(sdata, assoc_data->timeout);
4279 }
4280
4281 return 0;
4282 }
4283
4284 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
4285 __le16 fc, bool acked)
4286 {
4287 struct ieee80211_local *local = sdata->local;
4288
4289 sdata->u.mgd.status_fc = fc;
4290 sdata->u.mgd.status_acked = acked;
4291 sdata->u.mgd.status_received = true;
4292
4293 ieee80211_queue_work(&local->hw, &sdata->work);
4294 }
4295
4296 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
4297 {
4298 struct ieee80211_local *local = sdata->local;
4299 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4300
4301 sdata_lock(sdata);
4302
4303 if (ifmgd->status_received) {
4304 __le16 fc = ifmgd->status_fc;
4305 bool status_acked = ifmgd->status_acked;
4306
4307 ifmgd->status_received = false;
4308 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
4309 if (status_acked) {
4310 if (ifmgd->auth_data->algorithm ==
4311 WLAN_AUTH_SAE)
4312 ifmgd->auth_data->timeout =
4313 jiffies +
4314 IEEE80211_AUTH_TIMEOUT_SAE;
4315 else
4316 ifmgd->auth_data->timeout =
4317 jiffies +
4318 IEEE80211_AUTH_TIMEOUT_SHORT;
4319 run_again(sdata, ifmgd->auth_data->timeout);
4320 } else {
4321 ifmgd->auth_data->timeout = jiffies - 1;
4322 }
4323 ifmgd->auth_data->timeout_started = true;
4324 } else if (ifmgd->assoc_data &&
4325 (ieee80211_is_assoc_req(fc) ||
4326 ieee80211_is_reassoc_req(fc))) {
4327 if (status_acked) {
4328 ifmgd->assoc_data->timeout =
4329 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
4330 run_again(sdata, ifmgd->assoc_data->timeout);
4331 } else {
4332 ifmgd->assoc_data->timeout = jiffies - 1;
4333 }
4334 ifmgd->assoc_data->timeout_started = true;
4335 }
4336 }
4337
4338 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
4339 time_after(jiffies, ifmgd->auth_data->timeout)) {
4340 if (ifmgd->auth_data->done) {
4341 /*
4342 * ok ... we waited for assoc but userspace didn't,
4343 * so let's just kill the auth data
4344 */
4345 ieee80211_destroy_auth_data(sdata, false);
4346 } else if (ieee80211_auth(sdata)) {
4347 u8 bssid[ETH_ALEN];
4348 struct ieee80211_event event = {
4349 .type = MLME_EVENT,
4350 .u.mlme.data = AUTH_EVENT,
4351 .u.mlme.status = MLME_TIMEOUT,
4352 };
4353
4354 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
4355
4356 ieee80211_destroy_auth_data(sdata, false);
4357
4358 cfg80211_auth_timeout(sdata->dev, bssid);
4359 drv_event_callback(sdata->local, sdata, &event);
4360 }
4361 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
4362 run_again(sdata, ifmgd->auth_data->timeout);
4363
4364 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
4365 time_after(jiffies, ifmgd->assoc_data->timeout)) {
4366 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
4367 ieee80211_do_assoc(sdata)) {
4368 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4369 struct ieee80211_event event = {
4370 .type = MLME_EVENT,
4371 .u.mlme.data = ASSOC_EVENT,
4372 .u.mlme.status = MLME_TIMEOUT,
4373 };
4374
4375 ieee80211_destroy_assoc_data(sdata, false, false);
4376 cfg80211_assoc_timeout(sdata->dev, bss);
4377 drv_event_callback(sdata->local, sdata, &event);
4378 }
4379 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
4380 run_again(sdata, ifmgd->assoc_data->timeout);
4381
4382 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
4383 ifmgd->associated) {
4384 u8 bssid[ETH_ALEN];
4385 int max_tries;
4386
4387 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4388
4389 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4390 max_tries = max_nullfunc_tries;
4391 else
4392 max_tries = max_probe_tries;
4393
4394 /* ACK received for nullfunc probing frame */
4395 if (!ifmgd->probe_send_count)
4396 ieee80211_reset_ap_probe(sdata);
4397 else if (ifmgd->nullfunc_failed) {
4398 if (ifmgd->probe_send_count < max_tries) {
4399 mlme_dbg(sdata,
4400 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
4401 bssid, ifmgd->probe_send_count,
4402 max_tries);
4403 ieee80211_mgd_probe_ap_send(sdata);
4404 } else {
4405 mlme_dbg(sdata,
4406 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
4407 bssid);
4408 ieee80211_sta_connection_lost(sdata, bssid,
4409 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4410 false);
4411 }
4412 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
4413 run_again(sdata, ifmgd->probe_timeout);
4414 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4415 mlme_dbg(sdata,
4416 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
4417 bssid, probe_wait_ms);
4418 ieee80211_sta_connection_lost(sdata, bssid,
4419 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4420 } else if (ifmgd->probe_send_count < max_tries) {
4421 mlme_dbg(sdata,
4422 "No probe response from AP %pM after %dms, try %d/%i\n",
4423 bssid, probe_wait_ms,
4424 ifmgd->probe_send_count, max_tries);
4425 ieee80211_mgd_probe_ap_send(sdata);
4426 } else {
4427 /*
4428 * We actually lost the connection ... or did we?
4429 * Let's make sure!
4430 */
4431 mlme_dbg(sdata,
4432 "No probe response from AP %pM after %dms, disconnecting.\n",
4433 bssid, probe_wait_ms);
4434
4435 ieee80211_sta_connection_lost(sdata, bssid,
4436 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4437 }
4438 }
4439
4440 sdata_unlock(sdata);
4441 }
4442
4443 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
4444 {
4445 struct ieee80211_sub_if_data *sdata =
4446 from_timer(sdata, t, u.mgd.bcn_mon_timer);
4447 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4448
4449 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4450 return;
4451
4452 sdata->u.mgd.connection_loss = false;
4453 ieee80211_queue_work(&sdata->local->hw,
4454 &sdata->u.mgd.beacon_connection_loss_work);
4455 }
4456
4457 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
4458 {
4459 struct ieee80211_sub_if_data *sdata =
4460 from_timer(sdata, t, u.mgd.conn_mon_timer);
4461 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4462 struct ieee80211_local *local = sdata->local;
4463
4464 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4465 return;
4466
4467 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4468 }
4469
4470 static void ieee80211_sta_monitor_work(struct work_struct *work)
4471 {
4472 struct ieee80211_sub_if_data *sdata =
4473 container_of(work, struct ieee80211_sub_if_data,
4474 u.mgd.monitor_work);
4475
4476 ieee80211_mgd_probe_ap(sdata, false);
4477 }
4478
4479 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4480 {
4481 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4482 __ieee80211_stop_poll(sdata);
4483
4484 /* let's probe the connection once */
4485 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4486 ieee80211_queue_work(&sdata->local->hw,
4487 &sdata->u.mgd.monitor_work);
4488 }
4489 }
4490
4491 #ifdef CONFIG_PM
4492 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4493 {
4494 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4495 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4496
4497 sdata_lock(sdata);
4498
4499 if (ifmgd->auth_data || ifmgd->assoc_data) {
4500 const u8 *bssid = ifmgd->auth_data ?
4501 ifmgd->auth_data->bss->bssid :
4502 ifmgd->assoc_data->bss->bssid;
4503
4504 /*
4505 * If we are trying to authenticate / associate while suspending,
4506 * cfg80211 won't know and won't actually abort those attempts,
4507 * thus we need to do that ourselves.
4508 */
4509 ieee80211_send_deauth_disassoc(sdata, bssid, bssid,
4510 IEEE80211_STYPE_DEAUTH,
4511 WLAN_REASON_DEAUTH_LEAVING,
4512 false, frame_buf);
4513 if (ifmgd->assoc_data)
4514 ieee80211_destroy_assoc_data(sdata, false, true);
4515 if (ifmgd->auth_data)
4516 ieee80211_destroy_auth_data(sdata, false);
4517 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4518 IEEE80211_DEAUTH_FRAME_LEN);
4519 }
4520
4521 /* This is a bit of a hack - we should find a better and more generic
4522 * solution to this. Normally when suspending, cfg80211 will in fact
4523 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4524 * auth (not so important) or assoc (this is the problem) process.
4525 *
4526 * As a consequence, it can happen that we are in the process of both
4527 * associating and suspending, and receive an association response
4528 * after cfg80211 has checked if it needs to disconnect, but before
4529 * we actually set the flag to drop incoming frames. This will then
4530 * cause the workqueue flush to process the association response in
4531 * the suspend, resulting in a successful association just before it
4532 * tries to remove the interface from the driver, which now though
4533 * has a channel context assigned ... this results in issues.
4534 *
4535 * To work around this (for now) simply deauth here again if we're
4536 * now connected.
4537 */
4538 if (ifmgd->associated && !sdata->local->wowlan) {
4539 u8 bssid[ETH_ALEN];
4540 struct cfg80211_deauth_request req = {
4541 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4542 .bssid = bssid,
4543 };
4544
4545 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4546 ieee80211_mgd_deauth(sdata, &req);
4547 }
4548
4549 sdata_unlock(sdata);
4550 }
4551
4552 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4553 {
4554 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4555
4556 sdata_lock(sdata);
4557 if (!ifmgd->associated) {
4558 sdata_unlock(sdata);
4559 return;
4560 }
4561
4562 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4563 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4564 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4565 ieee80211_sta_connection_lost(sdata,
4566 ifmgd->associated->bssid,
4567 WLAN_REASON_UNSPECIFIED,
4568 true);
4569 sdata_unlock(sdata);
4570 return;
4571 }
4572 sdata_unlock(sdata);
4573 }
4574 #endif
4575
4576 /* interface setup */
4577 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4578 {
4579 struct ieee80211_if_managed *ifmgd;
4580
4581 ifmgd = &sdata->u.mgd;
4582 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4583 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4584 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4585 ieee80211_beacon_connection_loss_work);
4586 INIT_WORK(&ifmgd->csa_connection_drop_work,
4587 ieee80211_csa_connection_drop_work);
4588 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4589 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4590 ieee80211_tdls_peer_del_work);
4591 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
4592 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
4593 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
4594 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
4595 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4596 ieee80211_sta_handle_tspec_ac_params_wk);
4597
4598 ifmgd->flags = 0;
4599 ifmgd->powersave = sdata->wdev.ps;
4600 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4601 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4602 ifmgd->p2p_noa_index = -1;
4603
4604 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4605 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4606 else
4607 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4608
4609 /* Setup TDLS data */
4610 spin_lock_init(&ifmgd->teardown_lock);
4611 ifmgd->teardown_skb = NULL;
4612 ifmgd->orig_teardown_skb = NULL;
4613 }
4614
4615 /* scan finished notification */
4616 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4617 {
4618 struct ieee80211_sub_if_data *sdata;
4619
4620 /* Restart STA timers */
4621 rcu_read_lock();
4622 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4623 if (ieee80211_sdata_running(sdata))
4624 ieee80211_restart_sta_timer(sdata);
4625 }
4626 rcu_read_unlock();
4627 }
4628
4629 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4630 struct cfg80211_bss *cbss)
4631 {
4632 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4633 const u8 *ht_cap_ie, *vht_cap_ie;
4634 const struct ieee80211_ht_cap *ht_cap;
4635 const struct ieee80211_vht_cap *vht_cap;
4636 u8 chains = 1;
4637
4638 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4639 return chains;
4640
4641 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4642 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4643 ht_cap = (void *)(ht_cap_ie + 2);
4644 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4645 /*
4646 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4647 * "Tx Unequal Modulation Supported" fields.
4648 */
4649 }
4650
4651 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4652 return chains;
4653
4654 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4655 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4656 u8 nss;
4657 u16 tx_mcs_map;
4658
4659 vht_cap = (void *)(vht_cap_ie + 2);
4660 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4661 for (nss = 8; nss > 0; nss--) {
4662 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4663 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4664 break;
4665 }
4666 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4667 chains = max(chains, nss);
4668 }
4669
4670 return chains;
4671 }
4672
4673 static bool
4674 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband,
4675 const struct ieee80211_he_operation *he_op)
4676 {
4677 const struct ieee80211_sta_he_cap *sta_he_cap =
4678 ieee80211_get_he_sta_cap(sband);
4679 u16 ap_min_req_set;
4680 int i;
4681
4682 if (!sta_he_cap || !he_op)
4683 return false;
4684
4685 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4686
4687 /* Need to go over for 80MHz, 160MHz and for 80+80 */
4688 for (i = 0; i < 3; i++) {
4689 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
4690 &sta_he_cap->he_mcs_nss_supp;
4691 u16 sta_mcs_map_rx =
4692 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
4693 u16 sta_mcs_map_tx =
4694 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
4695 u8 nss;
4696 bool verified = true;
4697
4698 /*
4699 * For each band there is a maximum of 8 spatial streams
4700 * possible. Each of the sta_mcs_map_* is a 16-bit struct built
4701 * of 2 bits per NSS (1-8), with the values defined in enum
4702 * ieee80211_he_mcs_support. Need to make sure STA TX and RX
4703 * capabilities aren't less than the AP's minimum requirements
4704 * for this HE BSS per SS.
4705 * It is enough to find one such band that meets the reqs.
4706 */
4707 for (nss = 8; nss > 0; nss--) {
4708 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
4709 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
4710 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4711
4712 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4713 continue;
4714
4715 /*
4716 * Make sure the HE AP doesn't require MCSs that aren't
4717 * supported by the client
4718 */
4719 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4720 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4721 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
4722 verified = false;
4723 break;
4724 }
4725 }
4726
4727 if (verified)
4728 return true;
4729 }
4730
4731 /* If here, STA doesn't meet AP's HE min requirements */
4732 return false;
4733 }
4734
4735 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4736 struct cfg80211_bss *cbss)
4737 {
4738 struct ieee80211_local *local = sdata->local;
4739 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4740 const struct ieee80211_ht_cap *ht_cap = NULL;
4741 const struct ieee80211_ht_operation *ht_oper = NULL;
4742 const struct ieee80211_vht_operation *vht_oper = NULL;
4743 const struct ieee80211_he_operation *he_oper = NULL;
4744 struct ieee80211_supported_band *sband;
4745 struct cfg80211_chan_def chandef;
4746 int ret;
4747 u32 i;
4748 bool have_80mhz;
4749
4750 sband = local->hw.wiphy->bands[cbss->channel->band];
4751
4752 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4753 IEEE80211_STA_DISABLE_80P80MHZ |
4754 IEEE80211_STA_DISABLE_160MHZ);
4755
4756 rcu_read_lock();
4757
4758 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4759 sband->ht_cap.ht_supported) {
4760 const u8 *ht_oper_ie, *ht_cap_ie;
4761
4762 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4763 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4764 ht_oper = (void *)(ht_oper_ie + 2);
4765
4766 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4767 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4768 ht_cap = (void *)(ht_cap_ie + 2);
4769
4770 if (!ht_cap) {
4771 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4772 ht_oper = NULL;
4773 }
4774 }
4775
4776 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4777 sband->vht_cap.vht_supported) {
4778 const u8 *vht_oper_ie, *vht_cap;
4779
4780 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4781 WLAN_EID_VHT_OPERATION);
4782 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4783 vht_oper = (void *)(vht_oper_ie + 2);
4784 if (vht_oper && !ht_oper) {
4785 vht_oper = NULL;
4786 sdata_info(sdata,
4787 "AP advertised VHT without HT, disabling both\n");
4788 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4789 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4790 }
4791
4792 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4793 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4794 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4795 vht_oper = NULL;
4796 }
4797 }
4798
4799 if (!ieee80211_get_he_sta_cap(sband))
4800 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4801
4802 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) {
4803 const struct cfg80211_bss_ies *ies;
4804 const u8 *he_oper_ie;
4805
4806 ies = rcu_dereference(cbss->ies);
4807 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION,
4808 ies->data, ies->len);
4809 if (he_oper_ie &&
4810 he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3]))
4811 he_oper = (void *)(he_oper_ie + 3);
4812 else
4813 he_oper = NULL;
4814
4815 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper))
4816 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4817 }
4818
4819 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4820 have_80mhz = false;
4821 for (i = 0; i < sband->n_channels; i++) {
4822 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4823 IEEE80211_CHAN_NO_80MHZ))
4824 continue;
4825
4826 have_80mhz = true;
4827 break;
4828 }
4829
4830 if (!have_80mhz)
4831 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4832
4833 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4834 cbss->channel,
4835 ht_oper, vht_oper, he_oper,
4836 &chandef, false);
4837
4838 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4839 local->rx_chains);
4840
4841 rcu_read_unlock();
4842
4843 /* will change later if needed */
4844 sdata->smps_mode = IEEE80211_SMPS_OFF;
4845
4846 mutex_lock(&local->mtx);
4847 /*
4848 * If this fails (possibly due to channel context sharing
4849 * on incompatible channels, e.g. 80+80 and 160 sharing the
4850 * same control channel) try to use a smaller bandwidth.
4851 */
4852 ret = ieee80211_vif_use_channel(sdata, &chandef,
4853 IEEE80211_CHANCTX_SHARED);
4854
4855 /* don't downgrade for 5 and 10 MHz channels, though. */
4856 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4857 chandef.width == NL80211_CHAN_WIDTH_10)
4858 goto out;
4859
4860 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4861 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4862 ret = ieee80211_vif_use_channel(sdata, &chandef,
4863 IEEE80211_CHANCTX_SHARED);
4864 }
4865 out:
4866 mutex_unlock(&local->mtx);
4867 return ret;
4868 }
4869
4870 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies,
4871 u8 *dtim_count, u8 *dtim_period)
4872 {
4873 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len);
4874 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data,
4875 ies->len);
4876 const struct ieee80211_tim_ie *tim = NULL;
4877 const struct ieee80211_bssid_index *idx;
4878 bool valid = tim_ie && tim_ie[1] >= 2;
4879
4880 if (valid)
4881 tim = (void *)(tim_ie + 2);
4882
4883 if (dtim_count)
4884 *dtim_count = valid ? tim->dtim_count : 0;
4885
4886 if (dtim_period)
4887 *dtim_period = valid ? tim->dtim_period : 0;
4888
4889 /* Check if value is overridden by non-transmitted profile */
4890 if (!idx_ie || idx_ie[1] < 3)
4891 return valid;
4892
4893 idx = (void *)(idx_ie + 2);
4894
4895 if (dtim_count)
4896 *dtim_count = idx->dtim_count;
4897
4898 if (dtim_period)
4899 *dtim_period = idx->dtim_period;
4900
4901 return true;
4902 }
4903
4904 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4905 struct cfg80211_bss *cbss, bool assoc,
4906 bool override)
4907 {
4908 struct ieee80211_local *local = sdata->local;
4909 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4910 struct ieee80211_bss *bss = (void *)cbss->priv;
4911 struct sta_info *new_sta = NULL;
4912 struct ieee80211_supported_band *sband;
4913 bool have_sta = false;
4914 int err;
4915
4916 sband = local->hw.wiphy->bands[cbss->channel->band];
4917
4918 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4919 return -EINVAL;
4920
4921 /* If a reconfig is happening, bail out */
4922 if (local->in_reconfig)
4923 return -EBUSY;
4924
4925 if (assoc) {
4926 rcu_read_lock();
4927 have_sta = sta_info_get(sdata, cbss->bssid);
4928 rcu_read_unlock();
4929 }
4930
4931 if (!have_sta) {
4932 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4933 if (!new_sta)
4934 return -ENOMEM;
4935 }
4936
4937 /*
4938 * Set up the information for the new channel before setting the
4939 * new channel. We can't - completely race-free - change the basic
4940 * rates bitmap and the channel (sband) that it refers to, but if
4941 * we set it up before we at least avoid calling into the driver's
4942 * bss_info_changed() method with invalid information (since we do
4943 * call that from changing the channel - only for IDLE and perhaps
4944 * some others, but ...).
4945 *
4946 * So to avoid that, just set up all the new information before the
4947 * channel, but tell the driver to apply it only afterwards, since
4948 * it might need the new channel for that.
4949 */
4950 if (new_sta) {
4951 u32 rates = 0, basic_rates = 0;
4952 bool have_higher_than_11mbit;
4953 int min_rate = INT_MAX, min_rate_index = -1;
4954 const struct cfg80211_bss_ies *ies;
4955 int shift = ieee80211_vif_get_shift(&sdata->vif);
4956
4957 ieee80211_get_rates(sband, bss->supp_rates,
4958 bss->supp_rates_len,
4959 &rates, &basic_rates,
4960 &have_higher_than_11mbit,
4961 &min_rate, &min_rate_index,
4962 shift);
4963
4964 /*
4965 * This used to be a workaround for basic rates missing
4966 * in the association response frame. Now that we no
4967 * longer use the basic rates from there, it probably
4968 * doesn't happen any more, but keep the workaround so
4969 * in case some *other* APs are buggy in different ways
4970 * we can connect -- with a warning.
4971 */
4972 if (!basic_rates && min_rate_index >= 0) {
4973 sdata_info(sdata,
4974 "No basic rates, using min rate instead\n");
4975 basic_rates = BIT(min_rate_index);
4976 }
4977
4978 if (rates)
4979 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4980 else
4981 sdata_info(sdata,
4982 "No rates found, keeping mandatory only\n");
4983
4984 sdata->vif.bss_conf.basic_rates = basic_rates;
4985
4986 /* cf. IEEE 802.11 9.2.12 */
4987 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4988 have_higher_than_11mbit)
4989 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4990 else
4991 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4992
4993 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4994
4995 /* set timing information */
4996 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4997 rcu_read_lock();
4998 ies = rcu_dereference(cbss->beacon_ies);
4999 if (ies) {
5000 sdata->vif.bss_conf.sync_tsf = ies->tsf;
5001 sdata->vif.bss_conf.sync_device_ts =
5002 bss->device_ts_beacon;
5003
5004 ieee80211_get_dtim(ies,
5005 &sdata->vif.bss_conf.sync_dtim_count,
5006 NULL);
5007 } else if (!ieee80211_hw_check(&sdata->local->hw,
5008 TIMING_BEACON_ONLY)) {
5009 ies = rcu_dereference(cbss->proberesp_ies);
5010 /* must be non-NULL since beacon IEs were NULL */
5011 sdata->vif.bss_conf.sync_tsf = ies->tsf;
5012 sdata->vif.bss_conf.sync_device_ts =
5013 bss->device_ts_presp;
5014 sdata->vif.bss_conf.sync_dtim_count = 0;
5015 } else {
5016 sdata->vif.bss_conf.sync_tsf = 0;
5017 sdata->vif.bss_conf.sync_device_ts = 0;
5018 sdata->vif.bss_conf.sync_dtim_count = 0;
5019 }
5020 rcu_read_unlock();
5021 }
5022
5023 if (new_sta || override) {
5024 err = ieee80211_prep_channel(sdata, cbss);
5025 if (err) {
5026 if (new_sta)
5027 sta_info_free(local, new_sta);
5028 return -EINVAL;
5029 }
5030 }
5031
5032 if (new_sta) {
5033 /*
5034 * tell driver about BSSID, basic rates and timing
5035 * this was set up above, before setting the channel
5036 */
5037 ieee80211_bss_info_change_notify(sdata,
5038 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
5039 BSS_CHANGED_BEACON_INT);
5040
5041 if (assoc)
5042 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
5043
5044 err = sta_info_insert(new_sta);
5045 new_sta = NULL;
5046 if (err) {
5047 sdata_info(sdata,
5048 "failed to insert STA entry for the AP (error %d)\n",
5049 err);
5050 return err;
5051 }
5052 } else
5053 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
5054
5055 /* Cancel scan to ensure that nothing interferes with connection */
5056 if (local->scanning)
5057 ieee80211_scan_cancel(local);
5058
5059 return 0;
5060 }
5061
5062 /* config hooks */
5063 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
5064 struct cfg80211_auth_request *req)
5065 {
5066 struct ieee80211_local *local = sdata->local;
5067 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5068 struct ieee80211_mgd_auth_data *auth_data;
5069 u16 auth_alg;
5070 int err;
5071 bool cont_auth;
5072
5073 /* prepare auth data structure */
5074
5075 switch (req->auth_type) {
5076 case NL80211_AUTHTYPE_OPEN_SYSTEM:
5077 auth_alg = WLAN_AUTH_OPEN;
5078 break;
5079 case NL80211_AUTHTYPE_SHARED_KEY:
5080 if (fips_enabled)
5081 return -EOPNOTSUPP;
5082 auth_alg = WLAN_AUTH_SHARED_KEY;
5083 break;
5084 case NL80211_AUTHTYPE_FT:
5085 auth_alg = WLAN_AUTH_FT;
5086 break;
5087 case NL80211_AUTHTYPE_NETWORK_EAP:
5088 auth_alg = WLAN_AUTH_LEAP;
5089 break;
5090 case NL80211_AUTHTYPE_SAE:
5091 auth_alg = WLAN_AUTH_SAE;
5092 break;
5093 case NL80211_AUTHTYPE_FILS_SK:
5094 auth_alg = WLAN_AUTH_FILS_SK;
5095 break;
5096 case NL80211_AUTHTYPE_FILS_SK_PFS:
5097 auth_alg = WLAN_AUTH_FILS_SK_PFS;
5098 break;
5099 case NL80211_AUTHTYPE_FILS_PK:
5100 auth_alg = WLAN_AUTH_FILS_PK;
5101 break;
5102 default:
5103 return -EOPNOTSUPP;
5104 }
5105
5106 if (ifmgd->assoc_data)
5107 return -EBUSY;
5108
5109 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
5110 req->ie_len, GFP_KERNEL);
5111 if (!auth_data)
5112 return -ENOMEM;
5113
5114 auth_data->bss = req->bss;
5115
5116 if (req->auth_data_len >= 4) {
5117 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
5118 __le16 *pos = (__le16 *) req->auth_data;
5119
5120 auth_data->sae_trans = le16_to_cpu(pos[0]);
5121 auth_data->sae_status = le16_to_cpu(pos[1]);
5122 }
5123 memcpy(auth_data->data, req->auth_data + 4,
5124 req->auth_data_len - 4);
5125 auth_data->data_len += req->auth_data_len - 4;
5126 }
5127
5128 /* Check if continuing authentication or trying to authenticate with the
5129 * same BSS that we were in the process of authenticating with and avoid
5130 * removal and re-addition of the STA entry in
5131 * ieee80211_prep_connection().
5132 */
5133 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss;
5134
5135 if (req->ie && req->ie_len) {
5136 memcpy(&auth_data->data[auth_data->data_len],
5137 req->ie, req->ie_len);
5138 auth_data->data_len += req->ie_len;
5139 }
5140
5141 if (req->key && req->key_len) {
5142 auth_data->key_len = req->key_len;
5143 auth_data->key_idx = req->key_idx;
5144 memcpy(auth_data->key, req->key, req->key_len);
5145 }
5146
5147 auth_data->algorithm = auth_alg;
5148
5149 /* try to authenticate/probe */
5150
5151 if (ifmgd->auth_data) {
5152 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
5153 auth_data->peer_confirmed =
5154 ifmgd->auth_data->peer_confirmed;
5155 }
5156 ieee80211_destroy_auth_data(sdata, cont_auth);
5157 }
5158
5159 /* prep auth_data so we don't go into idle on disassoc */
5160 ifmgd->auth_data = auth_data;
5161
5162 /* If this is continuation of an ongoing SAE authentication exchange
5163 * (i.e., request to send SAE Confirm) and the peer has already
5164 * confirmed, mark authentication completed since we are about to send
5165 * out SAE Confirm.
5166 */
5167 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
5168 auth_data->peer_confirmed && auth_data->sae_trans == 2)
5169 ieee80211_mark_sta_auth(sdata, req->bss->bssid);
5170
5171 if (ifmgd->associated) {
5172 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5173
5174 sdata_info(sdata,
5175 "disconnect from AP %pM for new auth to %pM\n",
5176 ifmgd->associated->bssid, req->bss->bssid);
5177 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5178 WLAN_REASON_UNSPECIFIED,
5179 false, frame_buf);
5180
5181 ieee80211_report_disconnect(sdata, frame_buf,
5182 sizeof(frame_buf), true,
5183 WLAN_REASON_UNSPECIFIED);
5184 }
5185
5186 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
5187
5188 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false);
5189 if (err)
5190 goto err_clear;
5191
5192 err = ieee80211_auth(sdata);
5193 if (err) {
5194 sta_info_destroy_addr(sdata, req->bss->bssid);
5195 goto err_clear;
5196 }
5197
5198 /* hold our own reference */
5199 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
5200 return 0;
5201
5202 err_clear:
5203 eth_zero_addr(ifmgd->bssid);
5204 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5205 ifmgd->auth_data = NULL;
5206 mutex_lock(&sdata->local->mtx);
5207 ieee80211_vif_release_channel(sdata);
5208 mutex_unlock(&sdata->local->mtx);
5209 kfree(auth_data);
5210 return err;
5211 }
5212
5213 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
5214 struct cfg80211_assoc_request *req)
5215 {
5216 struct ieee80211_local *local = sdata->local;
5217 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5218 struct ieee80211_bss *bss = (void *)req->bss->priv;
5219 struct ieee80211_mgd_assoc_data *assoc_data;
5220 const struct cfg80211_bss_ies *beacon_ies;
5221 struct ieee80211_supported_band *sband;
5222 const u8 *ssidie, *ht_ie, *vht_ie;
5223 int i, err;
5224 bool override = false;
5225
5226 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
5227 if (!assoc_data)
5228 return -ENOMEM;
5229
5230 rcu_read_lock();
5231 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
5232 if (!ssidie || ssidie[1] > sizeof(assoc_data->ssid)) {
5233 rcu_read_unlock();
5234 kfree(assoc_data);
5235 return -EINVAL;
5236 }
5237 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
5238 assoc_data->ssid_len = ssidie[1];
5239 rcu_read_unlock();
5240
5241 if (ifmgd->associated) {
5242 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5243
5244 sdata_info(sdata,
5245 "disconnect from AP %pM for new assoc to %pM\n",
5246 ifmgd->associated->bssid, req->bss->bssid);
5247 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5248 WLAN_REASON_UNSPECIFIED,
5249 false, frame_buf);
5250
5251 ieee80211_report_disconnect(sdata, frame_buf,
5252 sizeof(frame_buf), true,
5253 WLAN_REASON_UNSPECIFIED);
5254 }
5255
5256 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
5257 err = -EBUSY;
5258 goto err_free;
5259 }
5260
5261 if (ifmgd->assoc_data) {
5262 err = -EBUSY;
5263 goto err_free;
5264 }
5265
5266 if (ifmgd->auth_data) {
5267 bool match;
5268
5269 /* keep sta info, bssid if matching */
5270 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
5271 ieee80211_destroy_auth_data(sdata, match);
5272 }
5273
5274 /* prepare assoc data */
5275
5276 ifmgd->beacon_crc_valid = false;
5277
5278 assoc_data->wmm = bss->wmm_used &&
5279 (local->hw.queues >= IEEE80211_NUM_ACS);
5280
5281 /*
5282 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
5283 * We still associate in non-HT mode (11a/b/g) if any one of these
5284 * ciphers is configured as pairwise.
5285 * We can set this to true for non-11n hardware, that'll be checked
5286 * separately along with the peer capabilities.
5287 */
5288 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
5289 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
5290 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
5291 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5292 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5293 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5294 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5295 netdev_info(sdata->dev,
5296 "disabling HT/VHT/HE due to WEP/TKIP use\n");
5297 }
5298 }
5299
5300 /* Also disable HT if we don't support it or the AP doesn't use WMM */
5301 sband = local->hw.wiphy->bands[req->bss->channel->band];
5302 if (!sband->ht_cap.ht_supported ||
5303 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5304 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5305 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5306 if (!bss->wmm_used &&
5307 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5308 netdev_info(sdata->dev,
5309 "disabling HT as WMM/QoS is not supported by the AP\n");
5310 }
5311
5312 /* disable VHT if we don't support it or the AP doesn't use WMM */
5313 if (!sband->vht_cap.vht_supported ||
5314 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5315 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5316 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5317 if (!bss->wmm_used &&
5318 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5319 netdev_info(sdata->dev,
5320 "disabling VHT as WMM/QoS is not supported by the AP\n");
5321 }
5322
5323 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
5324 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
5325 sizeof(ifmgd->ht_capa_mask));
5326
5327 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
5328 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
5329 sizeof(ifmgd->vht_capa_mask));
5330
5331 if (req->ie && req->ie_len) {
5332 memcpy(assoc_data->ie, req->ie, req->ie_len);
5333 assoc_data->ie_len = req->ie_len;
5334 }
5335
5336 if (req->fils_kek) {
5337 /* should already be checked in cfg80211 - so warn */
5338 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
5339 err = -EINVAL;
5340 goto err_free;
5341 }
5342 memcpy(assoc_data->fils_kek, req->fils_kek,
5343 req->fils_kek_len);
5344 assoc_data->fils_kek_len = req->fils_kek_len;
5345 }
5346
5347 if (req->fils_nonces)
5348 memcpy(assoc_data->fils_nonces, req->fils_nonces,
5349 2 * FILS_NONCE_LEN);
5350
5351 assoc_data->bss = req->bss;
5352
5353 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
5354 if (ifmgd->powersave)
5355 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
5356 else
5357 sdata->smps_mode = IEEE80211_SMPS_OFF;
5358 } else
5359 sdata->smps_mode = ifmgd->req_smps;
5360
5361 assoc_data->capability = req->bss->capability;
5362 assoc_data->supp_rates = bss->supp_rates;
5363 assoc_data->supp_rates_len = bss->supp_rates_len;
5364
5365 rcu_read_lock();
5366 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
5367 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
5368 assoc_data->ap_ht_param =
5369 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
5370 else
5371 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5372 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
5373 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
5374 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
5375 sizeof(struct ieee80211_vht_cap));
5376 else
5377 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5378 rcu_read_unlock();
5379
5380 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
5381 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
5382 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
5383 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
5384
5385 if (bss->wmm_used && bss->uapsd_supported &&
5386 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
5387 assoc_data->uapsd = true;
5388 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
5389 } else {
5390 assoc_data->uapsd = false;
5391 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
5392 }
5393
5394 if (req->prev_bssid)
5395 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
5396
5397 if (req->use_mfp) {
5398 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
5399 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
5400 } else {
5401 ifmgd->mfp = IEEE80211_MFP_DISABLED;
5402 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
5403 }
5404
5405 if (req->flags & ASSOC_REQ_USE_RRM)
5406 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
5407 else
5408 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
5409
5410 if (req->crypto.control_port)
5411 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
5412 else
5413 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
5414
5415 sdata->control_port_protocol = req->crypto.control_port_ethertype;
5416 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
5417 sdata->control_port_over_nl80211 =
5418 req->crypto.control_port_over_nl80211;
5419 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
5420 sdata->vif.type);
5421
5422 /* kick off associate process */
5423
5424 ifmgd->assoc_data = assoc_data;
5425 ifmgd->dtim_period = 0;
5426 ifmgd->have_beacon = false;
5427
5428 /* override HT/VHT configuration only if the AP and we support it */
5429 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
5430 struct ieee80211_sta_ht_cap sta_ht_cap;
5431
5432 if (req->flags & ASSOC_REQ_DISABLE_HT)
5433 override = true;
5434
5435 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
5436 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
5437
5438 /* check for 40 MHz disable override */
5439 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
5440 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
5441 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
5442 override = true;
5443
5444 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
5445 req->flags & ASSOC_REQ_DISABLE_VHT)
5446 override = true;
5447 }
5448
5449 if (req->flags & ASSOC_REQ_DISABLE_HT) {
5450 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5451 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5452 }
5453
5454 if (req->flags & ASSOC_REQ_DISABLE_VHT)
5455 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5456
5457 err = ieee80211_prep_connection(sdata, req->bss, true, override);
5458 if (err)
5459 goto err_clear;
5460
5461 rcu_read_lock();
5462 beacon_ies = rcu_dereference(req->bss->beacon_ies);
5463
5464 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
5465 !beacon_ies) {
5466 /*
5467 * Wait up to one beacon interval ...
5468 * should this be more if we miss one?
5469 */
5470 sdata_info(sdata, "waiting for beacon from %pM\n",
5471 ifmgd->bssid);
5472 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
5473 assoc_data->timeout_started = true;
5474 assoc_data->need_beacon = true;
5475 } else if (beacon_ies) {
5476 const u8 *ie;
5477 u8 dtim_count = 0;
5478
5479 ieee80211_get_dtim(beacon_ies, &dtim_count,
5480 &ifmgd->dtim_period);
5481
5482 ifmgd->have_beacon = true;
5483 assoc_data->timeout = jiffies;
5484 assoc_data->timeout_started = true;
5485
5486 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5487 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
5488 sdata->vif.bss_conf.sync_device_ts =
5489 bss->device_ts_beacon;
5490 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
5491 }
5492
5493 ie = cfg80211_find_ext_ie(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
5494 beacon_ies->data, beacon_ies->len);
5495 if (ie && ie[1] >= 3)
5496 sdata->vif.bss_conf.profile_periodicity = ie[4];
5497
5498 ie = cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY,
5499 beacon_ies->data, beacon_ies->len);
5500 if (ie && ie[1] >= 11 &&
5501 (ie[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
5502 sdata->vif.bss_conf.ema_ap = true;
5503 } else {
5504 assoc_data->timeout = jiffies;
5505 assoc_data->timeout_started = true;
5506 }
5507 rcu_read_unlock();
5508
5509 run_again(sdata, assoc_data->timeout);
5510
5511 if (bss->corrupt_data) {
5512 char *corrupt_type = "data";
5513 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
5514 if (bss->corrupt_data &
5515 IEEE80211_BSS_CORRUPT_PROBE_RESP)
5516 corrupt_type = "beacon and probe response";
5517 else
5518 corrupt_type = "beacon";
5519 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
5520 corrupt_type = "probe response";
5521 sdata_info(sdata, "associating with AP with corrupt %s\n",
5522 corrupt_type);
5523 }
5524
5525 return 0;
5526 err_clear:
5527 eth_zero_addr(ifmgd->bssid);
5528 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5529 ifmgd->assoc_data = NULL;
5530 err_free:
5531 kfree(assoc_data);
5532 return err;
5533 }
5534
5535 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
5536 struct cfg80211_deauth_request *req)
5537 {
5538 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5539 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5540 bool tx = !req->local_state_change;
5541
5542 if (ifmgd->auth_data &&
5543 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
5544 sdata_info(sdata,
5545 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
5546 req->bssid, req->reason_code,
5547 ieee80211_get_reason_code_string(req->reason_code));
5548
5549 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5550 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
5551 IEEE80211_STYPE_DEAUTH,
5552 req->reason_code, tx,
5553 frame_buf);
5554 ieee80211_destroy_auth_data(sdata, false);
5555 ieee80211_report_disconnect(sdata, frame_buf,
5556 sizeof(frame_buf), true,
5557 req->reason_code);
5558
5559 return 0;
5560 }
5561
5562 if (ifmgd->assoc_data &&
5563 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
5564 sdata_info(sdata,
5565 "aborting association with %pM by local choice (Reason: %u=%s)\n",
5566 req->bssid, req->reason_code,
5567 ieee80211_get_reason_code_string(req->reason_code));
5568
5569 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5570 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
5571 IEEE80211_STYPE_DEAUTH,
5572 req->reason_code, tx,
5573 frame_buf);
5574 ieee80211_destroy_assoc_data(sdata, false, true);
5575 ieee80211_report_disconnect(sdata, frame_buf,
5576 sizeof(frame_buf), true,
5577 req->reason_code);
5578 return 0;
5579 }
5580
5581 if (ifmgd->associated &&
5582 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5583 sdata_info(sdata,
5584 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5585 req->bssid, req->reason_code,
5586 ieee80211_get_reason_code_string(req->reason_code));
5587
5588 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5589 req->reason_code, tx, frame_buf);
5590 ieee80211_report_disconnect(sdata, frame_buf,
5591 sizeof(frame_buf), true,
5592 req->reason_code);
5593 return 0;
5594 }
5595
5596 return -ENOTCONN;
5597 }
5598
5599 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5600 struct cfg80211_disassoc_request *req)
5601 {
5602 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5603 u8 bssid[ETH_ALEN];
5604 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5605
5606 /*
5607 * cfg80211 should catch this ... but it's racy since
5608 * we can receive a disassoc frame, process it, hand it
5609 * to cfg80211 while that's in a locked section already
5610 * trying to tell us that the user wants to disconnect.
5611 */
5612 if (ifmgd->associated != req->bss)
5613 return -ENOLINK;
5614
5615 sdata_info(sdata,
5616 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5617 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5618
5619 memcpy(bssid, req->bss->bssid, ETH_ALEN);
5620 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5621 req->reason_code, !req->local_state_change,
5622 frame_buf);
5623
5624 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5625 req->reason_code);
5626
5627 return 0;
5628 }
5629
5630 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5631 {
5632 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5633
5634 /*
5635 * Make sure some work items will not run after this,
5636 * they will not do anything but might not have been
5637 * cancelled when disconnecting.
5638 */
5639 cancel_work_sync(&ifmgd->monitor_work);
5640 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5641 cancel_work_sync(&ifmgd->request_smps_work);
5642 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5643 cancel_work_sync(&ifmgd->chswitch_work);
5644 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5645
5646 sdata_lock(sdata);
5647 if (ifmgd->assoc_data) {
5648 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5649 ieee80211_destroy_assoc_data(sdata, false, false);
5650 cfg80211_assoc_timeout(sdata->dev, bss);
5651 }
5652 if (ifmgd->auth_data)
5653 ieee80211_destroy_auth_data(sdata, false);
5654 spin_lock_bh(&ifmgd->teardown_lock);
5655 if (ifmgd->teardown_skb) {
5656 kfree_skb(ifmgd->teardown_skb);
5657 ifmgd->teardown_skb = NULL;
5658 ifmgd->orig_teardown_skb = NULL;
5659 }
5660 kfree(ifmgd->assoc_req_ies);
5661 ifmgd->assoc_req_ies = NULL;
5662 ifmgd->assoc_req_ies_len = 0;
5663 spin_unlock_bh(&ifmgd->teardown_lock);
5664 del_timer_sync(&ifmgd->timer);
5665 sdata_unlock(sdata);
5666 }
5667
5668 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5669 enum nl80211_cqm_rssi_threshold_event rssi_event,
5670 s32 rssi_level,
5671 gfp_t gfp)
5672 {
5673 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5674
5675 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5676
5677 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5678 }
5679 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5680
5681 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5682 {
5683 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5684
5685 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5686
5687 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5688 }
5689 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
Linux with added FPC-III support