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Linux 5.7.7
[linux/fpc-iii.git] / net / mac80211 / mlme.c
blob16d75da0996a1636d496d85636a76ec2b29d567b
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 - 2020 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 |
168 IEEE80211_STA_DISABLE_VHT |
169 IEEE80211_STA_DISABLE_HE;
170 goto out;
171 }
172
173 chandef->width = NL80211_CHAN_WIDTH_20;
174
175 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
176 channel->band);
177 /* check that channel matches the right operating channel */
178 if (!tracking && channel->center_freq != ht_cfreq) {
179 /*
180 * It's possible that some APs are confused here;
181 * Netgear WNDR3700 sometimes reports 4 higher than
182 * the actual channel in association responses, but
183 * since we look at probe response/beacon data here
184 * it should be OK.
185 */
186 sdata_info(sdata,
187 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
188 channel->center_freq, ht_cfreq,
189 ht_oper->primary_chan, channel->band);
190 ret = IEEE80211_STA_DISABLE_HT |
191 IEEE80211_STA_DISABLE_VHT |
192 IEEE80211_STA_DISABLE_HE;
193 goto out;
194 }
195
196 /* check 40 MHz support, if we have it */
197 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
198 ieee80211_chandef_ht_oper(ht_oper, chandef);
199 } else {
200 /* 40 MHz (and 80 MHz) must be supported for VHT */
201 ret = IEEE80211_STA_DISABLE_VHT;
202 /* also mark 40 MHz disabled */
203 ret |= IEEE80211_STA_DISABLE_40MHZ;
204 goto out;
205 }
206
207 if (!vht_oper || !sband->vht_cap.vht_supported) {
208 ret = IEEE80211_STA_DISABLE_VHT;
209 goto out;
210 }
211
212 vht_chandef = *chandef;
213 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper &&
214 (le32_to_cpu(he_oper->he_oper_params) &
215 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) {
216 struct ieee80211_vht_operation he_oper_vht_cap;
217
218 /*
219 * Set only first 3 bytes (other 2 aren't used in
220 * ieee80211_chandef_vht_oper() anyway)
221 */
222 memcpy(&he_oper_vht_cap, he_oper->optional, 3);
223 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0);
224
225 if (!ieee80211_chandef_vht_oper(&sdata->local->hw,
226 &he_oper_vht_cap, ht_oper,
227 &vht_chandef)) {
228 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
229 sdata_info(sdata,
230 "HE AP VHT information is invalid, disable HE\n");
231 ret = IEEE80211_STA_DISABLE_HE;
232 goto out;
233 }
234 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_oper,
235 ht_oper, &vht_chandef)) {
236 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
237 sdata_info(sdata,
238 "AP VHT information is invalid, disable VHT\n");
239 ret = IEEE80211_STA_DISABLE_VHT;
240 goto out;
241 }
242
243 if (!cfg80211_chandef_valid(&vht_chandef)) {
244 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
245 sdata_info(sdata,
246 "AP VHT information is invalid, disable VHT\n");
247 ret = IEEE80211_STA_DISABLE_VHT;
248 goto out;
249 }
250
251 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
252 ret = 0;
253 goto out;
254 }
255
256 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
257 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
258 sdata_info(sdata,
259 "AP VHT information doesn't match HT, disable VHT\n");
260 ret = IEEE80211_STA_DISABLE_VHT;
261 goto out;
262 }
263
264 *chandef = vht_chandef;
265
266 ret = 0;
267
268 out:
269 /*
270 * When tracking the current AP, don't do any further checks if the
271 * new chandef is identical to the one we're currently using for the
272 * connection. This keeps us from playing ping-pong with regulatory,
273 * without it the following can happen (for example):
274 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
275 * - AP advertises regdom US
276 * - CRDA loads regdom US with 80 MHz prohibited (old database)
277 * - the code below detects an unsupported channel, downgrades, and
278 * we disconnect from the AP in the caller
279 * - disconnect causes CRDA to reload world regdomain and the game
280 * starts anew.
281 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
282 *
283 * It seems possible that there are still scenarios with CSA or real
284 * bandwidth changes where a this could happen, but those cases are
285 * less common and wouldn't completely prevent using the AP.
286 */
287 if (tracking &&
288 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
289 return ret;
290
291 /* don't print the message below for VHT mismatch if VHT is disabled */
292 if (ret & IEEE80211_STA_DISABLE_VHT)
293 vht_chandef = *chandef;
294
295 /*
296 * Ignore the DISABLED flag when we're already connected and only
297 * tracking the APs beacon for bandwidth changes - otherwise we
298 * might get disconnected here if we connect to an AP, update our
299 * regulatory information based on the AP's country IE and the
300 * information we have is wrong/outdated and disables the channel
301 * that we're actually using for the connection to the AP.
302 */
303 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
304 tracking ? 0 :
305 IEEE80211_CHAN_DISABLED)) {
306 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
307 ret = IEEE80211_STA_DISABLE_HT |
308 IEEE80211_STA_DISABLE_VHT |
309 IEEE80211_STA_DISABLE_HE;
310 break;
311 }
312
313 ret |= ieee80211_chandef_downgrade(chandef);
314 }
315
316 if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef,
317 IEEE80211_CHAN_NO_HE))
318 ret |= IEEE80211_STA_DISABLE_HE;
319
320 if (chandef->width != vht_chandef.width && !tracking)
321 sdata_info(sdata,
322 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
323
324 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
325 return ret;
326 }
327
328 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
329 struct sta_info *sta,
330 const struct ieee80211_ht_cap *ht_cap,
331 const struct ieee80211_ht_operation *ht_oper,
332 const struct ieee80211_vht_operation *vht_oper,
333 const struct ieee80211_he_operation *he_oper,
334 const u8 *bssid, u32 *changed)
335 {
336 struct ieee80211_local *local = sdata->local;
337 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
338 struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan;
339 struct ieee80211_supported_band *sband =
340 local->hw.wiphy->bands[chan->band];
341 struct cfg80211_chan_def chandef;
342 u16 ht_opmode;
343 u32 flags;
344 enum ieee80211_sta_rx_bandwidth new_sta_bw;
345 int ret;
346
347 /* if HT was/is disabled, don't track any bandwidth changes */
348 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
349 return 0;
350
351 /* don't check VHT if we associated as non-VHT station */
352 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
353 vht_oper = NULL;
354
355 /* don't check HE if we associated as non-HE station */
356 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE ||
357 !ieee80211_get_he_sta_cap(sband))
358 he_oper = NULL;
359
360 if (WARN_ON_ONCE(!sta))
361 return -EINVAL;
362
363 /*
364 * if bss configuration changed store the new one -
365 * this may be applicable even if channel is identical
366 */
367 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
368 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
369 *changed |= BSS_CHANGED_HT;
370 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
371 }
372
373 /* calculate new channel (type) based on HT/VHT/HE operation IEs */
374 flags = ieee80211_determine_chantype(sdata, sband, chan,
375 ht_oper, vht_oper, he_oper,
376 &chandef, true);
377
378 /*
379 * Downgrade the new channel if we associated with restricted
380 * capabilities. For example, if we associated as a 20 MHz STA
381 * to a 40 MHz AP (due to regulatory, capabilities or config
382 * reasons) then switching to a 40 MHz channel now won't do us
383 * any good -- we couldn't use it with the AP.
384 */
385 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
386 chandef.width == NL80211_CHAN_WIDTH_80P80)
387 flags |= ieee80211_chandef_downgrade(&chandef);
388 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
389 chandef.width == NL80211_CHAN_WIDTH_160)
390 flags |= ieee80211_chandef_downgrade(&chandef);
391 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
392 chandef.width > NL80211_CHAN_WIDTH_20)
393 flags |= ieee80211_chandef_downgrade(&chandef);
394
395 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
396 return 0;
397
398 sdata_info(sdata,
399 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
400 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
401 chandef.center_freq1, chandef.center_freq2);
402
403 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
404 IEEE80211_STA_DISABLE_VHT |
405 IEEE80211_STA_DISABLE_HE |
406 IEEE80211_STA_DISABLE_40MHZ |
407 IEEE80211_STA_DISABLE_80P80MHZ |
408 IEEE80211_STA_DISABLE_160MHZ)) ||
409 !cfg80211_chandef_valid(&chandef)) {
410 sdata_info(sdata,
411 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
412 ifmgd->bssid);
413 return -EINVAL;
414 }
415
416 switch (chandef.width) {
417 case NL80211_CHAN_WIDTH_20_NOHT:
418 case NL80211_CHAN_WIDTH_20:
419 new_sta_bw = IEEE80211_STA_RX_BW_20;
420 break;
421 case NL80211_CHAN_WIDTH_40:
422 new_sta_bw = IEEE80211_STA_RX_BW_40;
423 break;
424 case NL80211_CHAN_WIDTH_80:
425 new_sta_bw = IEEE80211_STA_RX_BW_80;
426 break;
427 case NL80211_CHAN_WIDTH_80P80:
428 case NL80211_CHAN_WIDTH_160:
429 new_sta_bw = IEEE80211_STA_RX_BW_160;
430 break;
431 default:
432 return -EINVAL;
433 }
434
435 if (new_sta_bw > sta->cur_max_bandwidth)
436 new_sta_bw = sta->cur_max_bandwidth;
437
438 if (new_sta_bw < sta->sta.bandwidth) {
439 sta->sta.bandwidth = new_sta_bw;
440 rate_control_rate_update(local, sband, sta,
441 IEEE80211_RC_BW_CHANGED);
442 }
443
444 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
445 if (ret) {
446 sdata_info(sdata,
447 "AP %pM changed bandwidth to incompatible one - disconnect\n",
448 ifmgd->bssid);
449 return ret;
450 }
451
452 if (new_sta_bw > sta->sta.bandwidth) {
453 sta->sta.bandwidth = new_sta_bw;
454 rate_control_rate_update(local, sband, sta,
455 IEEE80211_RC_BW_CHANGED);
456 }
457
458 return 0;
459 }
460
461 /* frame sending functions */
462
463 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
464 struct sk_buff *skb, u8 ap_ht_param,
465 struct ieee80211_supported_band *sband,
466 struct ieee80211_channel *channel,
467 enum ieee80211_smps_mode smps)
468 {
469 u8 *pos;
470 u32 flags = channel->flags;
471 u16 cap;
472 struct ieee80211_sta_ht_cap ht_cap;
473
474 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
475
476 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
477 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
478
479 /* determine capability flags */
480 cap = ht_cap.cap;
481
482 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
483 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
484 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
485 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
486 cap &= ~IEEE80211_HT_CAP_SGI_40;
487 }
488 break;
489 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
490 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
491 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
492 cap &= ~IEEE80211_HT_CAP_SGI_40;
493 }
494 break;
495 }
496
497 /*
498 * If 40 MHz was disabled associate as though we weren't
499 * capable of 40 MHz -- some broken APs will never fall
500 * back to trying to transmit in 20 MHz.
501 */
502 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
503 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
504 cap &= ~IEEE80211_HT_CAP_SGI_40;
505 }
506
507 /* set SM PS mode properly */
508 cap &= ~IEEE80211_HT_CAP_SM_PS;
509 switch (smps) {
510 case IEEE80211_SMPS_AUTOMATIC:
511 case IEEE80211_SMPS_NUM_MODES:
512 WARN_ON(1);
513 /* fall through */
514 case IEEE80211_SMPS_OFF:
515 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
516 IEEE80211_HT_CAP_SM_PS_SHIFT;
517 break;
518 case IEEE80211_SMPS_STATIC:
519 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
520 IEEE80211_HT_CAP_SM_PS_SHIFT;
521 break;
522 case IEEE80211_SMPS_DYNAMIC:
523 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
524 IEEE80211_HT_CAP_SM_PS_SHIFT;
525 break;
526 }
527
528 /* reserve and fill IE */
529 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
530 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
531 }
532
533 /* This function determines vht capability flags for the association
534 * and builds the IE.
535 * Note - the function may set the owner of the MU-MIMO capability
536 */
537 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
538 struct sk_buff *skb,
539 struct ieee80211_supported_band *sband,
540 struct ieee80211_vht_cap *ap_vht_cap)
541 {
542 struct ieee80211_local *local = sdata->local;
543 u8 *pos;
544 u32 cap;
545 struct ieee80211_sta_vht_cap vht_cap;
546 u32 mask, ap_bf_sts, our_bf_sts;
547
548 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
549
550 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
551 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
552
553 /* determine capability flags */
554 cap = vht_cap.cap;
555
556 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
557 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
558
559 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
560 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
561 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
562 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
563 }
564
565 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
566 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
567 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
568 }
569
570 /*
571 * Some APs apparently get confused if our capabilities are better
572 * than theirs, so restrict what we advertise in the assoc request.
573 */
574 if (!(ap_vht_cap->vht_cap_info &
575 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
576 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
577 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
578 else if (!(ap_vht_cap->vht_cap_info &
579 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
580 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
581
582 /*
583 * If some other vif is using the MU-MIMO capablity we cannot associate
584 * using MU-MIMO - this will lead to contradictions in the group-id
585 * mechanism.
586 * Ownership is defined since association request, in order to avoid
587 * simultaneous associations with MU-MIMO.
588 */
589 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
590 bool disable_mu_mimo = false;
591 struct ieee80211_sub_if_data *other;
592
593 list_for_each_entry_rcu(other, &local->interfaces, list) {
594 if (other->vif.mu_mimo_owner) {
595 disable_mu_mimo = true;
596 break;
597 }
598 }
599 if (disable_mu_mimo)
600 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
601 else
602 sdata->vif.mu_mimo_owner = true;
603 }
604
605 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
606
607 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
608 our_bf_sts = cap & mask;
609
610 if (ap_bf_sts < our_bf_sts) {
611 cap &= ~mask;
612 cap |= ap_bf_sts;
613 }
614
615 /* reserve and fill IE */
616 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
617 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
618 }
619
620 /* This function determines HE capability flags for the association
621 * and builds the IE.
622 */
623 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
624 struct sk_buff *skb,
625 struct ieee80211_supported_band *sband)
626 {
627 u8 *pos;
628 const struct ieee80211_sta_he_cap *he_cap = NULL;
629 struct ieee80211_chanctx_conf *chanctx_conf;
630 u8 he_cap_size;
631 bool reg_cap = false;
632
633 rcu_read_lock();
634 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
635 if (!WARN_ON_ONCE(!chanctx_conf))
636 reg_cap = cfg80211_chandef_usable(sdata->wdev.wiphy,
637 &chanctx_conf->def,
638 IEEE80211_CHAN_NO_HE);
639
640 rcu_read_unlock();
641
642 he_cap = ieee80211_get_he_sta_cap(sband);
643 if (!he_cap || !reg_cap)
644 return;
645
646 /*
647 * TODO: the 1 added is because this temporarily is under the EXTENSION
648 * IE. Get rid of it when it moves.
649 */
650 he_cap_size =
651 2 + 1 + sizeof(he_cap->he_cap_elem) +
652 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) +
653 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
654 he_cap->he_cap_elem.phy_cap_info);
655 pos = skb_put(skb, he_cap_size);
656 ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size);
657 }
658
659 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
660 {
661 struct ieee80211_local *local = sdata->local;
662 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
663 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
664 struct sk_buff *skb;
665 struct ieee80211_mgmt *mgmt;
666 u8 *pos, qos_info, *ie_start;
667 size_t offset = 0, noffset;
668 int i, count, rates_len, supp_rates_len, shift;
669 u16 capab;
670 struct ieee80211_supported_band *sband;
671 struct ieee80211_chanctx_conf *chanctx_conf;
672 struct ieee80211_channel *chan;
673 u32 rates = 0;
674 struct element *ext_capa = NULL;
675
676 /* we know it's writable, cast away the const */
677 if (assoc_data->ie_len)
678 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
679 assoc_data->ie,
680 assoc_data->ie_len);
681
682 sdata_assert_lock(sdata);
683
684 rcu_read_lock();
685 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
686 if (WARN_ON(!chanctx_conf)) {
687 rcu_read_unlock();
688 return;
689 }
690 chan = chanctx_conf->def.chan;
691 rcu_read_unlock();
692 sband = local->hw.wiphy->bands[chan->band];
693 shift = ieee80211_vif_get_shift(&sdata->vif);
694
695 if (assoc_data->supp_rates_len) {
696 /*
697 * Get all rates supported by the device and the AP as
698 * some APs don't like getting a superset of their rates
699 * in the association request (e.g. D-Link DAP 1353 in
700 * b-only mode)...
701 */
702 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
703 assoc_data->supp_rates,
704 assoc_data->supp_rates_len,
705 &rates);
706 } else {
707 /*
708 * In case AP not provide any supported rates information
709 * before association, we send information element(s) with
710 * all rates that we support.
711 */
712 rates_len = 0;
713 for (i = 0; i < sband->n_bitrates; i++) {
714 rates |= BIT(i);
715 rates_len++;
716 }
717 }
718
719 skb = alloc_skb(local->hw.extra_tx_headroom +
720 sizeof(*mgmt) + /* bit too much but doesn't matter */
721 2 + assoc_data->ssid_len + /* SSID */
722 4 + rates_len + /* (extended) rates */
723 4 + /* power capability */
724 2 + 2 * sband->n_channels + /* supported channels */
725 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
726 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
727 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */
728 sizeof(struct ieee80211_he_mcs_nss_supp) +
729 IEEE80211_HE_PPE_THRES_MAX_LEN +
730 assoc_data->ie_len + /* extra IEs */
731 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
732 9, /* WMM */
733 GFP_KERNEL);
734 if (!skb)
735 return;
736
737 skb_reserve(skb, local->hw.extra_tx_headroom);
738
739 capab = WLAN_CAPABILITY_ESS;
740
741 if (sband->band == NL80211_BAND_2GHZ) {
742 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
743 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
744 }
745
746 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
747 capab |= WLAN_CAPABILITY_PRIVACY;
748
749 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
750 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
751 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
752
753 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
754 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
755
756 mgmt = skb_put_zero(skb, 24);
757 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
758 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
759 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
760
761 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
762 skb_put(skb, 10);
763 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
764 IEEE80211_STYPE_REASSOC_REQ);
765 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
766 mgmt->u.reassoc_req.listen_interval =
767 cpu_to_le16(local->hw.conf.listen_interval);
768 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
769 ETH_ALEN);
770 } else {
771 skb_put(skb, 4);
772 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
773 IEEE80211_STYPE_ASSOC_REQ);
774 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
775 mgmt->u.assoc_req.listen_interval =
776 cpu_to_le16(local->hw.conf.listen_interval);
777 }
778
779 /* SSID */
780 pos = skb_put(skb, 2 + assoc_data->ssid_len);
781 ie_start = pos;
782 *pos++ = WLAN_EID_SSID;
783 *pos++ = assoc_data->ssid_len;
784 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
785
786 /* add all rates which were marked to be used above */
787 supp_rates_len = rates_len;
788 if (supp_rates_len > 8)
789 supp_rates_len = 8;
790
791 pos = skb_put(skb, supp_rates_len + 2);
792 *pos++ = WLAN_EID_SUPP_RATES;
793 *pos++ = supp_rates_len;
794
795 count = 0;
796 for (i = 0; i < sband->n_bitrates; i++) {
797 if (BIT(i) & rates) {
798 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
799 5 * (1 << shift));
800 *pos++ = (u8) rate;
801 if (++count == 8)
802 break;
803 }
804 }
805
806 if (rates_len > count) {
807 pos = skb_put(skb, rates_len - count + 2);
808 *pos++ = WLAN_EID_EXT_SUPP_RATES;
809 *pos++ = rates_len - count;
810
811 for (i++; i < sband->n_bitrates; i++) {
812 if (BIT(i) & rates) {
813 int rate;
814 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
815 5 * (1 << shift));
816 *pos++ = (u8) rate;
817 }
818 }
819 }
820
821 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
822 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
823 pos = skb_put(skb, 4);
824 *pos++ = WLAN_EID_PWR_CAPABILITY;
825 *pos++ = 2;
826 *pos++ = 0; /* min tx power */
827 /* max tx power */
828 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
829 }
830
831 /*
832 * Per spec, we shouldn't include the list of channels if we advertise
833 * support for extended channel switching, but we've always done that;
834 * (for now?) apply this restriction only on the (new) 6 GHz band.
835 */
836 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT &&
837 (sband->band != NL80211_BAND_6GHZ ||
838 !ext_capa || ext_capa->datalen < 1 ||
839 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) {
840 /* TODO: get this in reg domain format */
841 pos = skb_put(skb, 2 * sband->n_channels + 2);
842 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
843 *pos++ = 2 * sband->n_channels;
844 for (i = 0; i < sband->n_channels; i++) {
845 *pos++ = ieee80211_frequency_to_channel(
846 sband->channels[i].center_freq);
847 *pos++ = 1; /* one channel in the subband*/
848 }
849 }
850
851 /* Set MBSSID support for HE AP if needed */
852 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) &&
853 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len &&
854 ext_capa && ext_capa->datalen >= 3)
855 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
856
857 /* if present, add any custom IEs that go before HT */
858 if (assoc_data->ie_len) {
859 static const u8 before_ht[] = {
860 WLAN_EID_SSID,
861 WLAN_EID_SUPP_RATES,
862 WLAN_EID_EXT_SUPP_RATES,
863 WLAN_EID_PWR_CAPABILITY,
864 WLAN_EID_SUPPORTED_CHANNELS,
865 WLAN_EID_RSN,
866 WLAN_EID_QOS_CAPA,
867 WLAN_EID_RRM_ENABLED_CAPABILITIES,
868 WLAN_EID_MOBILITY_DOMAIN,
869 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
870 WLAN_EID_RIC_DATA, /* reassoc only */
871 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
872 };
873 static const u8 after_ric[] = {
874 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
875 WLAN_EID_HT_CAPABILITY,
876 WLAN_EID_BSS_COEX_2040,
877 /* luckily this is almost always there */
878 WLAN_EID_EXT_CAPABILITY,
879 WLAN_EID_QOS_TRAFFIC_CAPA,
880 WLAN_EID_TIM_BCAST_REQ,
881 WLAN_EID_INTERWORKING,
882 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
883 WLAN_EID_VHT_CAPABILITY,
884 WLAN_EID_OPMODE_NOTIF,
885 };
886
887 noffset = ieee80211_ie_split_ric(assoc_data->ie,
888 assoc_data->ie_len,
889 before_ht,
890 ARRAY_SIZE(before_ht),
891 after_ric,
892 ARRAY_SIZE(after_ric),
893 offset);
894 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
895 offset = noffset;
896 }
897
898 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
899 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
900 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
901
902 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
903 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
904 sband, chan, sdata->smps_mode);
905
906 /* if present, add any custom IEs that go before VHT */
907 if (assoc_data->ie_len) {
908 static const u8 before_vht[] = {
909 /*
910 * no need to list the ones split off before HT
911 * or generated here
912 */
913 WLAN_EID_BSS_COEX_2040,
914 WLAN_EID_EXT_CAPABILITY,
915 WLAN_EID_QOS_TRAFFIC_CAPA,
916 WLAN_EID_TIM_BCAST_REQ,
917 WLAN_EID_INTERWORKING,
918 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
919 };
920
921 /* RIC already taken above, so no need to handle here anymore */
922 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
923 before_vht, ARRAY_SIZE(before_vht),
924 offset);
925 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
926 offset = noffset;
927 }
928
929 /* if present, add any custom IEs that go before HE */
930 if (assoc_data->ie_len) {
931 static const u8 before_he[] = {
932 /*
933 * no need to list the ones split off before VHT
934 * or generated here
935 */
936 WLAN_EID_OPMODE_NOTIF,
937 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
938 /* 11ai elements */
939 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
940 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
941 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
942 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
943 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
944 /* TODO: add 11ah/11aj/11ak elements */
945 };
946
947 /* RIC already taken above, so no need to handle here anymore */
948 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
949 before_he, ARRAY_SIZE(before_he),
950 offset);
951 pos = skb_put(skb, noffset - offset);
952 memcpy(pos, assoc_data->ie + offset, noffset - offset);
953 offset = noffset;
954 }
955
956 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
957 ieee80211_add_vht_ie(sdata, skb, sband,
958 &assoc_data->ap_vht_cap);
959
960 /*
961 * If AP doesn't support HT, mark HE as disabled.
962 * If on the 5GHz band, make sure it supports VHT.
963 */
964 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT ||
965 (sband->band == NL80211_BAND_5GHZ &&
966 ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
967 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
968
969 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
970 ieee80211_add_he_ie(sdata, skb, sband);
971
972 /* if present, add any custom non-vendor IEs that go after HE */
973 if (assoc_data->ie_len) {
974 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
975 assoc_data->ie_len,
976 offset);
977 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
978 offset = noffset;
979 }
980
981 if (assoc_data->wmm) {
982 if (assoc_data->uapsd) {
983 qos_info = ifmgd->uapsd_queues;
984 qos_info |= (ifmgd->uapsd_max_sp_len <<
985 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
986 } else {
987 qos_info = 0;
988 }
989
990 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
991 }
992
993 /* add any remaining custom (i.e. vendor specific here) IEs */
994 if (assoc_data->ie_len) {
995 noffset = assoc_data->ie_len;
996 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
997 }
998
999 if (assoc_data->fils_kek_len &&
1000 fils_encrypt_assoc_req(skb, assoc_data) < 0) {
1001 dev_kfree_skb(skb);
1002 return;
1003 }
1004
1005 pos = skb_tail_pointer(skb);
1006 kfree(ifmgd->assoc_req_ies);
1007 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC);
1008 ifmgd->assoc_req_ies_len = pos - ie_start;
1009
1010 drv_mgd_prepare_tx(local, sdata, 0);
1011
1012 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1013 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1014 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
1015 IEEE80211_TX_INTFL_MLME_CONN_TX;
1016 ieee80211_tx_skb(sdata, skb);
1017 }
1018
1019 void ieee80211_send_pspoll(struct ieee80211_local *local,
1020 struct ieee80211_sub_if_data *sdata)
1021 {
1022 struct ieee80211_pspoll *pspoll;
1023 struct sk_buff *skb;
1024
1025 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
1026 if (!skb)
1027 return;
1028
1029 pspoll = (struct ieee80211_pspoll *) skb->data;
1030 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1031
1032 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1033 ieee80211_tx_skb(sdata, skb);
1034 }
1035
1036 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1037 struct ieee80211_sub_if_data *sdata,
1038 bool powersave)
1039 {
1040 struct sk_buff *skb;
1041 struct ieee80211_hdr_3addr *nullfunc;
1042 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1043
1044 /* Don't send NDPs when STA is connected HE */
1045 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1046 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
1047 return;
1048
1049 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
1050 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
1051 if (!skb)
1052 return;
1053
1054 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
1055 if (powersave)
1056 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1057
1058 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1059 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1060
1061 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1062 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
1063
1064 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1065 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1066
1067 ieee80211_tx_skb(sdata, skb);
1068 }
1069
1070 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
1071 struct ieee80211_sub_if_data *sdata)
1072 {
1073 struct sk_buff *skb;
1074 struct ieee80211_hdr *nullfunc;
1075 __le16 fc;
1076
1077 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1078 return;
1079
1080 /* Don't send NDPs when connected HE */
1081 if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE))
1082 return;
1083
1084 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1085 if (!skb)
1086 return;
1087
1088 skb_reserve(skb, local->hw.extra_tx_headroom);
1089
1090 nullfunc = skb_put_zero(skb, 30);
1091 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
1092 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1093 nullfunc->frame_control = fc;
1094 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
1095 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1096 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
1097 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
1098
1099 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1100 ieee80211_tx_skb(sdata, skb);
1101 }
1102
1103 /* spectrum management related things */
1104 static void ieee80211_chswitch_work(struct work_struct *work)
1105 {
1106 struct ieee80211_sub_if_data *sdata =
1107 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
1108 struct ieee80211_local *local = sdata->local;
1109 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1110 int ret;
1111
1112 if (!ieee80211_sdata_running(sdata))
1113 return;
1114
1115 sdata_lock(sdata);
1116 mutex_lock(&local->mtx);
1117 mutex_lock(&local->chanctx_mtx);
1118
1119 if (!ifmgd->associated)
1120 goto out;
1121
1122 if (!sdata->vif.csa_active)
1123 goto out;
1124
1125 /*
1126 * using reservation isn't immediate as it may be deferred until later
1127 * with multi-vif. once reservation is complete it will re-schedule the
1128 * work with no reserved_chanctx so verify chandef to check if it
1129 * completed successfully
1130 */
1131
1132 if (sdata->reserved_chanctx) {
1133 struct ieee80211_supported_band *sband = NULL;
1134 struct sta_info *mgd_sta = NULL;
1135 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;
1136
1137 /*
1138 * with multi-vif csa driver may call ieee80211_csa_finish()
1139 * many times while waiting for other interfaces to use their
1140 * reservations
1141 */
1142 if (sdata->reserved_ready)
1143 goto out;
1144
1145 if (sdata->vif.bss_conf.chandef.width !=
1146 sdata->csa_chandef.width) {
1147 /*
1148 * For managed interface, we need to also update the AP
1149 * station bandwidth and align the rate scale algorithm
1150 * on the bandwidth change. Here we only consider the
1151 * bandwidth of the new channel definition (as channel
1152 * switch flow does not have the full HT/VHT/HE
1153 * information), assuming that if additional changes are
1154 * required they would be done as part of the processing
1155 * of the next beacon from the AP.
1156 */
1157 switch (sdata->csa_chandef.width) {
1158 case NL80211_CHAN_WIDTH_20_NOHT:
1159 case NL80211_CHAN_WIDTH_20:
1160 default:
1161 bw = IEEE80211_STA_RX_BW_20;
1162 break;
1163 case NL80211_CHAN_WIDTH_40:
1164 bw = IEEE80211_STA_RX_BW_40;
1165 break;
1166 case NL80211_CHAN_WIDTH_80:
1167 bw = IEEE80211_STA_RX_BW_80;
1168 break;
1169 case NL80211_CHAN_WIDTH_80P80:
1170 case NL80211_CHAN_WIDTH_160:
1171 bw = IEEE80211_STA_RX_BW_160;
1172 break;
1173 }
1174
1175 mgd_sta = sta_info_get(sdata, ifmgd->bssid);
1176 sband =
1177 local->hw.wiphy->bands[sdata->csa_chandef.chan->band];
1178 }
1179
1180 if (sdata->vif.bss_conf.chandef.width >
1181 sdata->csa_chandef.width) {
1182 mgd_sta->sta.bandwidth = bw;
1183 rate_control_rate_update(local, sband, mgd_sta,
1184 IEEE80211_RC_BW_CHANGED);
1185 }
1186
1187 ret = ieee80211_vif_use_reserved_context(sdata);
1188 if (ret) {
1189 sdata_info(sdata,
1190 "failed to use reserved channel context, disconnecting (err=%d)\n",
1191 ret);
1192 ieee80211_queue_work(&sdata->local->hw,
1193 &ifmgd->csa_connection_drop_work);
1194 goto out;
1195 }
1196
1197 if (sdata->vif.bss_conf.chandef.width <
1198 sdata->csa_chandef.width) {
1199 mgd_sta->sta.bandwidth = bw;
1200 rate_control_rate_update(local, sband, mgd_sta,
1201 IEEE80211_RC_BW_CHANGED);
1202 }
1203
1204 goto out;
1205 }
1206
1207 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1208 &sdata->csa_chandef)) {
1209 sdata_info(sdata,
1210 "failed to finalize channel switch, disconnecting\n");
1211 ieee80211_queue_work(&sdata->local->hw,
1212 &ifmgd->csa_connection_drop_work);
1213 goto out;
1214 }
1215
1216 ifmgd->csa_waiting_bcn = true;
1217
1218 ieee80211_sta_reset_beacon_monitor(sdata);
1219 ieee80211_sta_reset_conn_monitor(sdata);
1220
1221 out:
1222 mutex_unlock(&local->chanctx_mtx);
1223 mutex_unlock(&local->mtx);
1224 sdata_unlock(sdata);
1225 }
1226
1227 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1228 {
1229 struct ieee80211_local *local = sdata->local;
1230 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1231 int ret;
1232
1233 sdata_assert_lock(sdata);
1234
1235 WARN_ON(!sdata->vif.csa_active);
1236
1237 if (sdata->csa_block_tx) {
1238 ieee80211_wake_vif_queues(local, sdata,
1239 IEEE80211_QUEUE_STOP_REASON_CSA);
1240 sdata->csa_block_tx = false;
1241 }
1242
1243 sdata->vif.csa_active = false;
1244 ifmgd->csa_waiting_bcn = false;
1245
1246 ret = drv_post_channel_switch(sdata);
1247 if (ret) {
1248 sdata_info(sdata,
1249 "driver post channel switch failed, disconnecting\n");
1250 ieee80211_queue_work(&local->hw,
1251 &ifmgd->csa_connection_drop_work);
1252 return;
1253 }
1254
1255 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1256 }
1257
1258 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1259 {
1260 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1261 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1262
1263 trace_api_chswitch_done(sdata, success);
1264 if (!success) {
1265 sdata_info(sdata,
1266 "driver channel switch failed, disconnecting\n");
1267 ieee80211_queue_work(&sdata->local->hw,
1268 &ifmgd->csa_connection_drop_work);
1269 } else {
1270 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1271 }
1272 }
1273 EXPORT_SYMBOL(ieee80211_chswitch_done);
1274
1275 static void ieee80211_chswitch_timer(struct timer_list *t)
1276 {
1277 struct ieee80211_sub_if_data *sdata =
1278 from_timer(sdata, t, u.mgd.chswitch_timer);
1279
1280 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1281 }
1282
1283 static void
1284 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata)
1285 {
1286 struct ieee80211_local *local = sdata->local;
1287
1288 if (!local->ops->abort_channel_switch)
1289 return;
1290
1291 mutex_lock(&local->mtx);
1292
1293 mutex_lock(&local->chanctx_mtx);
1294 ieee80211_vif_unreserve_chanctx(sdata);
1295 mutex_unlock(&local->chanctx_mtx);
1296
1297 if (sdata->csa_block_tx)
1298 ieee80211_wake_vif_queues(local, sdata,
1299 IEEE80211_QUEUE_STOP_REASON_CSA);
1300
1301 sdata->csa_block_tx = false;
1302 sdata->vif.csa_active = false;
1303
1304 mutex_unlock(&local->mtx);
1305
1306 drv_abort_channel_switch(sdata);
1307 }
1308
1309 static void
1310 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1311 u64 timestamp, u32 device_timestamp,
1312 struct ieee802_11_elems *elems,
1313 bool beacon)
1314 {
1315 struct ieee80211_local *local = sdata->local;
1316 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1317 struct cfg80211_bss *cbss = ifmgd->associated;
1318 struct ieee80211_chanctx_conf *conf;
1319 struct ieee80211_chanctx *chanctx;
1320 enum nl80211_band current_band;
1321 struct ieee80211_csa_ie csa_ie;
1322 struct ieee80211_channel_switch ch_switch;
1323 int res;
1324
1325 sdata_assert_lock(sdata);
1326
1327 if (!cbss)
1328 return;
1329
1330 if (local->scanning)
1331 return;
1332
1333 current_band = cbss->channel->band;
1334 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1335 ifmgd->flags,
1336 ifmgd->associated->bssid, &csa_ie);
1337
1338 if (!res) {
1339 ch_switch.timestamp = timestamp;
1340 ch_switch.device_timestamp = device_timestamp;
1341 ch_switch.block_tx = csa_ie.mode;
1342 ch_switch.chandef = csa_ie.chandef;
1343 ch_switch.count = csa_ie.count;
1344 ch_switch.delay = csa_ie.max_switch_time;
1345 }
1346
1347 if (res < 0) {
1348 ieee80211_queue_work(&local->hw,
1349 &ifmgd->csa_connection_drop_work);
1350 return;
1351 }
1352
1353 if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) {
1354 if (res)
1355 ieee80211_sta_abort_chanswitch(sdata);
1356 else
1357 drv_channel_switch_rx_beacon(sdata, &ch_switch);
1358 return;
1359 } else if (sdata->vif.csa_active || res) {
1360 /* disregard subsequent announcements if already processing */
1361 return;
1362 }
1363
1364 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1365 IEEE80211_CHAN_DISABLED)) {
1366 sdata_info(sdata,
1367 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1368 ifmgd->associated->bssid,
1369 csa_ie.chandef.chan->center_freq,
1370 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1371 csa_ie.chandef.center_freq2);
1372 ieee80211_queue_work(&local->hw,
1373 &ifmgd->csa_connection_drop_work);
1374 return;
1375 }
1376
1377 if (cfg80211_chandef_identical(&csa_ie.chandef,
1378 &sdata->vif.bss_conf.chandef) &&
1379 (!csa_ie.mode || !beacon)) {
1380 if (ifmgd->csa_ignored_same_chan)
1381 return;
1382 sdata_info(sdata,
1383 "AP %pM tries to chanswitch to same channel, ignore\n",
1384 ifmgd->associated->bssid);
1385 ifmgd->csa_ignored_same_chan = true;
1386 return;
1387 }
1388
1389 /*
1390 * Drop all TDLS peers - either we disconnect or move to a different
1391 * channel from this point on. There's no telling what our peer will do.
1392 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1393 * have an incompatible wider chandef.
1394 */
1395 ieee80211_teardown_tdls_peers(sdata);
1396
1397 mutex_lock(&local->mtx);
1398 mutex_lock(&local->chanctx_mtx);
1399 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1400 lockdep_is_held(&local->chanctx_mtx));
1401 if (!conf) {
1402 sdata_info(sdata,
1403 "no channel context assigned to vif?, disconnecting\n");
1404 goto drop_connection;
1405 }
1406
1407 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1408
1409 if (local->use_chanctx &&
1410 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1411 sdata_info(sdata,
1412 "driver doesn't support chan-switch with channel contexts\n");
1413 goto drop_connection;
1414 }
1415
1416 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1417 sdata_info(sdata,
1418 "preparing for channel switch failed, disconnecting\n");
1419 goto drop_connection;
1420 }
1421
1422 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1423 chanctx->mode, false);
1424 if (res) {
1425 sdata_info(sdata,
1426 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1427 res);
1428 goto drop_connection;
1429 }
1430 mutex_unlock(&local->chanctx_mtx);
1431
1432 sdata->vif.csa_active = true;
1433 sdata->csa_chandef = csa_ie.chandef;
1434 sdata->csa_block_tx = csa_ie.mode;
1435 ifmgd->csa_ignored_same_chan = false;
1436
1437 if (sdata->csa_block_tx)
1438 ieee80211_stop_vif_queues(local, sdata,
1439 IEEE80211_QUEUE_STOP_REASON_CSA);
1440 mutex_unlock(&local->mtx);
1441
1442 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1443 csa_ie.count);
1444
1445 if (local->ops->channel_switch) {
1446 /* use driver's channel switch callback */
1447 drv_channel_switch(local, sdata, &ch_switch);
1448 return;
1449 }
1450
1451 /* channel switch handled in software */
1452 if (csa_ie.count <= 1)
1453 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1454 else
1455 mod_timer(&ifmgd->chswitch_timer,
1456 TU_TO_EXP_TIME((csa_ie.count - 1) *
1457 cbss->beacon_interval));
1458 return;
1459 drop_connection:
1460 /*
1461 * This is just so that the disconnect flow will know that
1462 * we were trying to switch channel and failed. In case the
1463 * mode is 1 (we are not allowed to Tx), we will know not to
1464 * send a deauthentication frame. Those two fields will be
1465 * reset when the disconnection worker runs.
1466 */
1467 sdata->vif.csa_active = true;
1468 sdata->csa_block_tx = csa_ie.mode;
1469
1470 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1471 mutex_unlock(&local->chanctx_mtx);
1472 mutex_unlock(&local->mtx);
1473 }
1474
1475 static bool
1476 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1477 struct ieee80211_channel *channel,
1478 const u8 *country_ie, u8 country_ie_len,
1479 const u8 *pwr_constr_elem,
1480 int *chan_pwr, int *pwr_reduction)
1481 {
1482 struct ieee80211_country_ie_triplet *triplet;
1483 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1484 int i, chan_increment;
1485 bool have_chan_pwr = false;
1486
1487 /* Invalid IE */
1488 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1489 return false;
1490
1491 triplet = (void *)(country_ie + 3);
1492 country_ie_len -= 3;
1493
1494 switch (channel->band) {
1495 default:
1496 WARN_ON_ONCE(1);
1497 /* fall through */
1498 case NL80211_BAND_2GHZ:
1499 case NL80211_BAND_60GHZ:
1500 chan_increment = 1;
1501 break;
1502 case NL80211_BAND_5GHZ:
1503 chan_increment = 4;
1504 break;
1505 }
1506
1507 /* find channel */
1508 while (country_ie_len >= 3) {
1509 u8 first_channel = triplet->chans.first_channel;
1510
1511 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1512 goto next;
1513
1514 for (i = 0; i < triplet->chans.num_channels; i++) {
1515 if (first_channel + i * chan_increment == chan) {
1516 have_chan_pwr = true;
1517 *chan_pwr = triplet->chans.max_power;
1518 break;
1519 }
1520 }
1521 if (have_chan_pwr)
1522 break;
1523
1524 next:
1525 triplet++;
1526 country_ie_len -= 3;
1527 }
1528
1529 if (have_chan_pwr && pwr_constr_elem)
1530 *pwr_reduction = *pwr_constr_elem;
1531 else
1532 *pwr_reduction = 0;
1533
1534 return have_chan_pwr;
1535 }
1536
1537 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1538 struct ieee80211_channel *channel,
1539 const u8 *cisco_dtpc_ie,
1540 int *pwr_level)
1541 {
1542 /* From practical testing, the first data byte of the DTPC element
1543 * seems to contain the requested dBm level, and the CLI on Cisco
1544 * APs clearly state the range is -127 to 127 dBm, which indicates
1545 * a signed byte, although it seemingly never actually goes negative.
1546 * The other byte seems to always be zero.
1547 */
1548 *pwr_level = (__s8)cisco_dtpc_ie[4];
1549 }
1550
1551 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1552 struct ieee80211_channel *channel,
1553 struct ieee80211_mgmt *mgmt,
1554 const u8 *country_ie, u8 country_ie_len,
1555 const u8 *pwr_constr_ie,
1556 const u8 *cisco_dtpc_ie)
1557 {
1558 bool has_80211h_pwr = false, has_cisco_pwr = false;
1559 int chan_pwr = 0, pwr_reduction_80211h = 0;
1560 int pwr_level_cisco, pwr_level_80211h;
1561 int new_ap_level;
1562 __le16 capab = mgmt->u.probe_resp.capab_info;
1563
1564 if (country_ie &&
1565 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1566 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1567 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1568 sdata, channel, country_ie, country_ie_len,
1569 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1570 pwr_level_80211h =
1571 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1572 }
1573
1574 if (cisco_dtpc_ie) {
1575 ieee80211_find_cisco_dtpc(
1576 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1577 has_cisco_pwr = true;
1578 }
1579
1580 if (!has_80211h_pwr && !has_cisco_pwr)
1581 return 0;
1582
1583 /* If we have both 802.11h and Cisco DTPC, apply both limits
1584 * by picking the smallest of the two power levels advertised.
1585 */
1586 if (has_80211h_pwr &&
1587 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1588 new_ap_level = pwr_level_80211h;
1589
1590 if (sdata->ap_power_level == new_ap_level)
1591 return 0;
1592
1593 sdata_dbg(sdata,
1594 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1595 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1596 sdata->u.mgd.bssid);
1597 } else { /* has_cisco_pwr is always true here. */
1598 new_ap_level = pwr_level_cisco;
1599
1600 if (sdata->ap_power_level == new_ap_level)
1601 return 0;
1602
1603 sdata_dbg(sdata,
1604 "Limiting TX power to %d dBm as advertised by %pM\n",
1605 pwr_level_cisco, sdata->u.mgd.bssid);
1606 }
1607
1608 sdata->ap_power_level = new_ap_level;
1609 if (__ieee80211_recalc_txpower(sdata))
1610 return BSS_CHANGED_TXPOWER;
1611 return 0;
1612 }
1613
1614 /* powersave */
1615 static void ieee80211_enable_ps(struct ieee80211_local *local,
1616 struct ieee80211_sub_if_data *sdata)
1617 {
1618 struct ieee80211_conf *conf = &local->hw.conf;
1619
1620 /*
1621 * If we are scanning right now then the parameters will
1622 * take effect when scan finishes.
1623 */
1624 if (local->scanning)
1625 return;
1626
1627 if (conf->dynamic_ps_timeout > 0 &&
1628 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1629 mod_timer(&local->dynamic_ps_timer, jiffies +
1630 msecs_to_jiffies(conf->dynamic_ps_timeout));
1631 } else {
1632 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1633 ieee80211_send_nullfunc(local, sdata, true);
1634
1635 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1636 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1637 return;
1638
1639 conf->flags |= IEEE80211_CONF_PS;
1640 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1641 }
1642 }
1643
1644 static void ieee80211_change_ps(struct ieee80211_local *local)
1645 {
1646 struct ieee80211_conf *conf = &local->hw.conf;
1647
1648 if (local->ps_sdata) {
1649 ieee80211_enable_ps(local, local->ps_sdata);
1650 } else if (conf->flags & IEEE80211_CONF_PS) {
1651 conf->flags &= ~IEEE80211_CONF_PS;
1652 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1653 del_timer_sync(&local->dynamic_ps_timer);
1654 cancel_work_sync(&local->dynamic_ps_enable_work);
1655 }
1656 }
1657
1658 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1659 {
1660 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1661 struct sta_info *sta = NULL;
1662 bool authorized = false;
1663
1664 if (!mgd->powersave)
1665 return false;
1666
1667 if (mgd->broken_ap)
1668 return false;
1669
1670 if (!mgd->associated)
1671 return false;
1672
1673 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1674 return false;
1675
1676 if (!mgd->have_beacon)
1677 return false;
1678
1679 rcu_read_lock();
1680 sta = sta_info_get(sdata, mgd->bssid);
1681 if (sta)
1682 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1683 rcu_read_unlock();
1684
1685 return authorized;
1686 }
1687
1688 /* need to hold RTNL or interface lock */
1689 void ieee80211_recalc_ps(struct ieee80211_local *local)
1690 {
1691 struct ieee80211_sub_if_data *sdata, *found = NULL;
1692 int count = 0;
1693 int timeout;
1694
1695 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1696 local->ps_sdata = NULL;
1697 return;
1698 }
1699
1700 list_for_each_entry(sdata, &local->interfaces, list) {
1701 if (!ieee80211_sdata_running(sdata))
1702 continue;
1703 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1704 /* If an AP vif is found, then disable PS
1705 * by setting the count to zero thereby setting
1706 * ps_sdata to NULL.
1707 */
1708 count = 0;
1709 break;
1710 }
1711 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1712 continue;
1713 found = sdata;
1714 count++;
1715 }
1716
1717 if (count == 1 && ieee80211_powersave_allowed(found)) {
1718 u8 dtimper = found->u.mgd.dtim_period;
1719
1720 timeout = local->dynamic_ps_forced_timeout;
1721 if (timeout < 0)
1722 timeout = 100;
1723 local->hw.conf.dynamic_ps_timeout = timeout;
1724
1725 /* If the TIM IE is invalid, pretend the value is 1 */
1726 if (!dtimper)
1727 dtimper = 1;
1728
1729 local->hw.conf.ps_dtim_period = dtimper;
1730 local->ps_sdata = found;
1731 } else {
1732 local->ps_sdata = NULL;
1733 }
1734
1735 ieee80211_change_ps(local);
1736 }
1737
1738 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1739 {
1740 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1741
1742 if (sdata->vif.bss_conf.ps != ps_allowed) {
1743 sdata->vif.bss_conf.ps = ps_allowed;
1744 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1745 }
1746 }
1747
1748 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1749 {
1750 struct ieee80211_local *local =
1751 container_of(work, struct ieee80211_local,
1752 dynamic_ps_disable_work);
1753
1754 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1755 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1756 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1757 }
1758
1759 ieee80211_wake_queues_by_reason(&local->hw,
1760 IEEE80211_MAX_QUEUE_MAP,
1761 IEEE80211_QUEUE_STOP_REASON_PS,
1762 false);
1763 }
1764
1765 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1766 {
1767 struct ieee80211_local *local =
1768 container_of(work, struct ieee80211_local,
1769 dynamic_ps_enable_work);
1770 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1771 struct ieee80211_if_managed *ifmgd;
1772 unsigned long flags;
1773 int q;
1774
1775 /* can only happen when PS was just disabled anyway */
1776 if (!sdata)
1777 return;
1778
1779 ifmgd = &sdata->u.mgd;
1780
1781 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1782 return;
1783
1784 if (local->hw.conf.dynamic_ps_timeout > 0) {
1785 /* don't enter PS if TX frames are pending */
1786 if (drv_tx_frames_pending(local)) {
1787 mod_timer(&local->dynamic_ps_timer, jiffies +
1788 msecs_to_jiffies(
1789 local->hw.conf.dynamic_ps_timeout));
1790 return;
1791 }
1792
1793 /*
1794 * transmission can be stopped by others which leads to
1795 * dynamic_ps_timer expiry. Postpone the ps timer if it
1796 * is not the actual idle state.
1797 */
1798 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1799 for (q = 0; q < local->hw.queues; q++) {
1800 if (local->queue_stop_reasons[q]) {
1801 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1802 flags);
1803 mod_timer(&local->dynamic_ps_timer, jiffies +
1804 msecs_to_jiffies(
1805 local->hw.conf.dynamic_ps_timeout));
1806 return;
1807 }
1808 }
1809 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1810 }
1811
1812 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1813 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1814 if (drv_tx_frames_pending(local)) {
1815 mod_timer(&local->dynamic_ps_timer, jiffies +
1816 msecs_to_jiffies(
1817 local->hw.conf.dynamic_ps_timeout));
1818 } else {
1819 ieee80211_send_nullfunc(local, sdata, true);
1820 /* Flush to get the tx status of nullfunc frame */
1821 ieee80211_flush_queues(local, sdata, false);
1822 }
1823 }
1824
1825 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1826 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1827 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1828 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1829 local->hw.conf.flags |= IEEE80211_CONF_PS;
1830 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1831 }
1832 }
1833
1834 void ieee80211_dynamic_ps_timer(struct timer_list *t)
1835 {
1836 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1837
1838 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1839 }
1840
1841 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1842 {
1843 struct delayed_work *delayed_work = to_delayed_work(work);
1844 struct ieee80211_sub_if_data *sdata =
1845 container_of(delayed_work, struct ieee80211_sub_if_data,
1846 dfs_cac_timer_work);
1847 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1848
1849 mutex_lock(&sdata->local->mtx);
1850 if (sdata->wdev.cac_started) {
1851 ieee80211_vif_release_channel(sdata);
1852 cfg80211_cac_event(sdata->dev, &chandef,
1853 NL80211_RADAR_CAC_FINISHED,
1854 GFP_KERNEL);
1855 }
1856 mutex_unlock(&sdata->local->mtx);
1857 }
1858
1859 static bool
1860 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1861 {
1862 struct ieee80211_local *local = sdata->local;
1863 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1864 bool ret = false;
1865 int ac;
1866
1867 if (local->hw.queues < IEEE80211_NUM_ACS)
1868 return false;
1869
1870 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1871 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1872 int non_acm_ac;
1873 unsigned long now = jiffies;
1874
1875 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1876 tx_tspec->admitted_time &&
1877 time_after(now, tx_tspec->time_slice_start + HZ)) {
1878 tx_tspec->consumed_tx_time = 0;
1879 tx_tspec->time_slice_start = now;
1880
1881 if (tx_tspec->downgraded)
1882 tx_tspec->action =
1883 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1884 }
1885
1886 switch (tx_tspec->action) {
1887 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1888 /* take the original parameters */
1889 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1890 sdata_err(sdata,
1891 "failed to set TX queue parameters for queue %d\n",
1892 ac);
1893 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1894 tx_tspec->downgraded = false;
1895 ret = true;
1896 break;
1897 case TX_TSPEC_ACTION_DOWNGRADE:
1898 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1899 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1900 ret = true;
1901 break;
1902 }
1903 /* downgrade next lower non-ACM AC */
1904 for (non_acm_ac = ac + 1;
1905 non_acm_ac < IEEE80211_NUM_ACS;
1906 non_acm_ac++)
1907 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1908 break;
1909 /* Usually the loop will result in using BK even if it
1910 * requires admission control, but such a configuration
1911 * makes no sense and we have to transmit somehow - the
1912 * AC selection does the same thing.
1913 * If we started out trying to downgrade from BK, then
1914 * the extra condition here might be needed.
1915 */
1916 if (non_acm_ac >= IEEE80211_NUM_ACS)
1917 non_acm_ac = IEEE80211_AC_BK;
1918 if (drv_conf_tx(local, sdata, ac,
1919 &sdata->tx_conf[non_acm_ac]))
1920 sdata_err(sdata,
1921 "failed to set TX queue parameters for queue %d\n",
1922 ac);
1923 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1924 ret = true;
1925 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1926 tx_tspec->time_slice_start + HZ - now + 1);
1927 break;
1928 case TX_TSPEC_ACTION_NONE:
1929 /* nothing now */
1930 break;
1931 }
1932 }
1933
1934 return ret;
1935 }
1936
1937 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1938 {
1939 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1940 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1941 }
1942
1943 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1944 {
1945 struct ieee80211_sub_if_data *sdata;
1946
1947 sdata = container_of(work, struct ieee80211_sub_if_data,
1948 u.mgd.tx_tspec_wk.work);
1949 ieee80211_sta_handle_tspec_ac_params(sdata);
1950 }
1951
1952 /* MLME */
1953 static bool
1954 ieee80211_sta_wmm_params(struct ieee80211_local *local,
1955 struct ieee80211_sub_if_data *sdata,
1956 const u8 *wmm_param, size_t wmm_param_len,
1957 const struct ieee80211_mu_edca_param_set *mu_edca)
1958 {
1959 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1960 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1961 size_t left;
1962 int count, mu_edca_count, ac;
1963 const u8 *pos;
1964 u8 uapsd_queues = 0;
1965
1966 if (!local->ops->conf_tx)
1967 return false;
1968
1969 if (local->hw.queues < IEEE80211_NUM_ACS)
1970 return false;
1971
1972 if (!wmm_param)
1973 return false;
1974
1975 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1976 return false;
1977
1978 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1979 uapsd_queues = ifmgd->uapsd_queues;
1980
1981 count = wmm_param[6] & 0x0f;
1982 /* -1 is the initial value of ifmgd->mu_edca_last_param_set.
1983 * if mu_edca was preset before and now it disappeared tell
1984 * the driver about it.
1985 */
1986 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1;
1987 if (count == ifmgd->wmm_last_param_set &&
1988 mu_edca_count == ifmgd->mu_edca_last_param_set)
1989 return false;
1990 ifmgd->wmm_last_param_set = count;
1991 ifmgd->mu_edca_last_param_set = mu_edca_count;
1992
1993 pos = wmm_param + 8;
1994 left = wmm_param_len - 8;
1995
1996 memset(&params, 0, sizeof(params));
1997
1998 sdata->wmm_acm = 0;
1999 for (; left >= 4; left -= 4, pos += 4) {
2000 int aci = (pos[0] >> 5) & 0x03;
2001 int acm = (pos[0] >> 4) & 0x01;
2002 bool uapsd = false;
2003
2004 switch (aci) {
2005 case 1: /* AC_BK */
2006 ac = IEEE80211_AC_BK;
2007 if (acm)
2008 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
2009 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
2010 uapsd = true;
2011 params[ac].mu_edca = !!mu_edca;
2012 if (mu_edca)
2013 params[ac].mu_edca_param_rec = mu_edca->ac_bk;
2014 break;
2015 case 2: /* AC_VI */
2016 ac = IEEE80211_AC_VI;
2017 if (acm)
2018 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
2019 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
2020 uapsd = true;
2021 params[ac].mu_edca = !!mu_edca;
2022 if (mu_edca)
2023 params[ac].mu_edca_param_rec = mu_edca->ac_vi;
2024 break;
2025 case 3: /* AC_VO */
2026 ac = IEEE80211_AC_VO;
2027 if (acm)
2028 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
2029 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
2030 uapsd = true;
2031 params[ac].mu_edca = !!mu_edca;
2032 if (mu_edca)
2033 params[ac].mu_edca_param_rec = mu_edca->ac_vo;
2034 break;
2035 case 0: /* AC_BE */
2036 default:
2037 ac = IEEE80211_AC_BE;
2038 if (acm)
2039 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
2040 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
2041 uapsd = true;
2042 params[ac].mu_edca = !!mu_edca;
2043 if (mu_edca)
2044 params[ac].mu_edca_param_rec = mu_edca->ac_be;
2045 break;
2046 }
2047
2048 params[ac].aifs = pos[0] & 0x0f;
2049
2050 if (params[ac].aifs < 2) {
2051 sdata_info(sdata,
2052 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
2053 params[ac].aifs, aci);
2054 params[ac].aifs = 2;
2055 }
2056 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
2057 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
2058 params[ac].txop = get_unaligned_le16(pos + 2);
2059 params[ac].acm = acm;
2060 params[ac].uapsd = uapsd;
2061
2062 if (params[ac].cw_min == 0 ||
2063 params[ac].cw_min > params[ac].cw_max) {
2064 sdata_info(sdata,
2065 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
2066 params[ac].cw_min, params[ac].cw_max, aci);
2067 return false;
2068 }
2069 ieee80211_regulatory_limit_wmm_params(sdata, &params[ac], ac);
2070 }
2071
2072 /* WMM specification requires all 4 ACIs. */
2073 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2074 if (params[ac].cw_min == 0) {
2075 sdata_info(sdata,
2076 "AP has invalid WMM params (missing AC %d), using defaults\n",
2077 ac);
2078 return false;
2079 }
2080 }
2081
2082 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2083 mlme_dbg(sdata,
2084 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
2085 ac, params[ac].acm,
2086 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
2087 params[ac].txop, params[ac].uapsd,
2088 ifmgd->tx_tspec[ac].downgraded);
2089 sdata->tx_conf[ac] = params[ac];
2090 if (!ifmgd->tx_tspec[ac].downgraded &&
2091 drv_conf_tx(local, sdata, ac, &params[ac]))
2092 sdata_err(sdata,
2093 "failed to set TX queue parameters for AC %d\n",
2094 ac);
2095 }
2096
2097 /* enable WMM or activate new settings */
2098 sdata->vif.bss_conf.qos = true;
2099 return true;
2100 }
2101
2102 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2103 {
2104 lockdep_assert_held(&sdata->local->mtx);
2105
2106 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2107 ieee80211_run_deferred_scan(sdata->local);
2108 }
2109
2110 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2111 {
2112 mutex_lock(&sdata->local->mtx);
2113 __ieee80211_stop_poll(sdata);
2114 mutex_unlock(&sdata->local->mtx);
2115 }
2116
2117 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
2118 u16 capab, bool erp_valid, u8 erp)
2119 {
2120 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2121 struct ieee80211_supported_band *sband;
2122 u32 changed = 0;
2123 bool use_protection;
2124 bool use_short_preamble;
2125 bool use_short_slot;
2126
2127 sband = ieee80211_get_sband(sdata);
2128 if (!sband)
2129 return changed;
2130
2131 if (erp_valid) {
2132 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
2133 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
2134 } else {
2135 use_protection = false;
2136 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
2137 }
2138
2139 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
2140 if (sband->band == NL80211_BAND_5GHZ)
2141 use_short_slot = true;
2142
2143 if (use_protection != bss_conf->use_cts_prot) {
2144 bss_conf->use_cts_prot = use_protection;
2145 changed |= BSS_CHANGED_ERP_CTS_PROT;
2146 }
2147
2148 if (use_short_preamble != bss_conf->use_short_preamble) {
2149 bss_conf->use_short_preamble = use_short_preamble;
2150 changed |= BSS_CHANGED_ERP_PREAMBLE;
2151 }
2152
2153 if (use_short_slot != bss_conf->use_short_slot) {
2154 bss_conf->use_short_slot = use_short_slot;
2155 changed |= BSS_CHANGED_ERP_SLOT;
2156 }
2157
2158 return changed;
2159 }
2160
2161 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2162 struct cfg80211_bss *cbss,
2163 u32 bss_info_changed)
2164 {
2165 struct ieee80211_bss *bss = (void *)cbss->priv;
2166 struct ieee80211_local *local = sdata->local;
2167 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2168
2169 bss_info_changed |= BSS_CHANGED_ASSOC;
2170 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
2171 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
2172
2173 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
2174 beacon_loss_count * bss_conf->beacon_int));
2175
2176 sdata->u.mgd.associated = cbss;
2177 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2178
2179 ieee80211_check_rate_mask(sdata);
2180
2181 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
2182
2183 if (sdata->vif.p2p ||
2184 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2185 const struct cfg80211_bss_ies *ies;
2186
2187 rcu_read_lock();
2188 ies = rcu_dereference(cbss->ies);
2189 if (ies) {
2190 int ret;
2191
2192 ret = cfg80211_get_p2p_attr(
2193 ies->data, ies->len,
2194 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2195 (u8 *) &bss_conf->p2p_noa_attr,
2196 sizeof(bss_conf->p2p_noa_attr));
2197 if (ret >= 2) {
2198 sdata->u.mgd.p2p_noa_index =
2199 bss_conf->p2p_noa_attr.index;
2200 bss_info_changed |= BSS_CHANGED_P2P_PS;
2201 }
2202 }
2203 rcu_read_unlock();
2204 }
2205
2206 /* just to be sure */
2207 ieee80211_stop_poll(sdata);
2208
2209 ieee80211_led_assoc(local, 1);
2210
2211 if (sdata->u.mgd.have_beacon) {
2212 /*
2213 * If the AP is buggy we may get here with no DTIM period
2214 * known, so assume it's 1 which is the only safe assumption
2215 * in that case, although if the TIM IE is broken powersave
2216 * probably just won't work at all.
2217 */
2218 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
2219 bss_conf->beacon_rate = bss->beacon_rate;
2220 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2221 } else {
2222 bss_conf->beacon_rate = NULL;
2223 bss_conf->dtim_period = 0;
2224 }
2225
2226 bss_conf->assoc = 1;
2227
2228 /* Tell the driver to monitor connection quality (if supported) */
2229 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2230 bss_conf->cqm_rssi_thold)
2231 bss_info_changed |= BSS_CHANGED_CQM;
2232
2233 /* Enable ARP filtering */
2234 if (bss_conf->arp_addr_cnt)
2235 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
2236
2237 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2238
2239 mutex_lock(&local->iflist_mtx);
2240 ieee80211_recalc_ps(local);
2241 mutex_unlock(&local->iflist_mtx);
2242
2243 ieee80211_recalc_smps(sdata);
2244 ieee80211_recalc_ps_vif(sdata);
2245
2246 netif_carrier_on(sdata->dev);
2247 }
2248
2249 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2250 u16 stype, u16 reason, bool tx,
2251 u8 *frame_buf)
2252 {
2253 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2254 struct ieee80211_local *local = sdata->local;
2255 u32 changed = 0;
2256
2257 sdata_assert_lock(sdata);
2258
2259 if (WARN_ON_ONCE(tx && !frame_buf))
2260 return;
2261
2262 if (WARN_ON(!ifmgd->associated))
2263 return;
2264
2265 ieee80211_stop_poll(sdata);
2266
2267 ifmgd->associated = NULL;
2268 netif_carrier_off(sdata->dev);
2269
2270 /*
2271 * if we want to get out of ps before disassoc (why?) we have
2272 * to do it before sending disassoc, as otherwise the null-packet
2273 * won't be valid.
2274 */
2275 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2276 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2277 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2278 }
2279 local->ps_sdata = NULL;
2280
2281 /* disable per-vif ps */
2282 ieee80211_recalc_ps_vif(sdata);
2283
2284 /* make sure ongoing transmission finishes */
2285 synchronize_net();
2286
2287 /*
2288 * drop any frame before deauth/disassoc, this can be data or
2289 * management frame. Since we are disconnecting, we should not
2290 * insist sending these frames which can take time and delay
2291 * the disconnection and possible the roaming.
2292 */
2293 if (tx)
2294 ieee80211_flush_queues(local, sdata, true);
2295
2296 /* deauthenticate/disassociate now */
2297 if (tx || frame_buf) {
2298 /*
2299 * In multi channel scenarios guarantee that the virtual
2300 * interface is granted immediate airtime to transmit the
2301 * deauthentication frame by calling mgd_prepare_tx, if the
2302 * driver requested so.
2303 */
2304 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
2305 !ifmgd->have_beacon)
2306 drv_mgd_prepare_tx(sdata->local, sdata, 0);
2307
2308 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid,
2309 ifmgd->bssid, stype, reason,
2310 tx, frame_buf);
2311 }
2312
2313 /* flush out frame - make sure the deauth was actually sent */
2314 if (tx)
2315 ieee80211_flush_queues(local, sdata, false);
2316
2317 /* clear bssid only after building the needed mgmt frames */
2318 eth_zero_addr(ifmgd->bssid);
2319
2320 /* remove AP and TDLS peers */
2321 sta_info_flush(sdata);
2322
2323 /* finally reset all BSS / config parameters */
2324 changed |= ieee80211_reset_erp_info(sdata);
2325
2326 ieee80211_led_assoc(local, 0);
2327 changed |= BSS_CHANGED_ASSOC;
2328 sdata->vif.bss_conf.assoc = false;
2329
2330 ifmgd->p2p_noa_index = -1;
2331 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2332 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2333
2334 /* on the next assoc, re-program HT/VHT parameters */
2335 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2336 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2337 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2338 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2339
2340 /* reset MU-MIMO ownership and group data */
2341 memset(sdata->vif.bss_conf.mu_group.membership, 0,
2342 sizeof(sdata->vif.bss_conf.mu_group.membership));
2343 memset(sdata->vif.bss_conf.mu_group.position, 0,
2344 sizeof(sdata->vif.bss_conf.mu_group.position));
2345 changed |= BSS_CHANGED_MU_GROUPS;
2346 sdata->vif.mu_mimo_owner = false;
2347
2348 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2349
2350 del_timer_sync(&local->dynamic_ps_timer);
2351 cancel_work_sync(&local->dynamic_ps_enable_work);
2352
2353 /* Disable ARP filtering */
2354 if (sdata->vif.bss_conf.arp_addr_cnt)
2355 changed |= BSS_CHANGED_ARP_FILTER;
2356
2357 sdata->vif.bss_conf.qos = false;
2358 changed |= BSS_CHANGED_QOS;
2359
2360 /* The BSSID (not really interesting) and HT changed */
2361 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2362 ieee80211_bss_info_change_notify(sdata, changed);
2363
2364 /* disassociated - set to defaults now */
2365 ieee80211_set_wmm_default(sdata, false, false);
2366
2367 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2368 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2369 del_timer_sync(&sdata->u.mgd.timer);
2370 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2371
2372 sdata->vif.bss_conf.dtim_period = 0;
2373 sdata->vif.bss_conf.beacon_rate = NULL;
2374
2375 ifmgd->have_beacon = false;
2376
2377 ifmgd->flags = 0;
2378 mutex_lock(&local->mtx);
2379 ieee80211_vif_release_channel(sdata);
2380
2381 sdata->vif.csa_active = false;
2382 ifmgd->csa_waiting_bcn = false;
2383 ifmgd->csa_ignored_same_chan = false;
2384 if (sdata->csa_block_tx) {
2385 ieee80211_wake_vif_queues(local, sdata,
2386 IEEE80211_QUEUE_STOP_REASON_CSA);
2387 sdata->csa_block_tx = false;
2388 }
2389 mutex_unlock(&local->mtx);
2390
2391 /* existing TX TSPEC sessions no longer exist */
2392 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2393 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2394
2395 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2396 }
2397
2398 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2399 struct ieee80211_hdr *hdr)
2400 {
2401 /*
2402 * We can postpone the mgd.timer whenever receiving unicast frames
2403 * from AP because we know that the connection is working both ways
2404 * at that time. But multicast frames (and hence also beacons) must
2405 * be ignored here, because we need to trigger the timer during
2406 * data idle periods for sending the periodic probe request to the
2407 * AP we're connected to.
2408 */
2409 if (is_multicast_ether_addr(hdr->addr1))
2410 return;
2411
2412 ieee80211_sta_reset_conn_monitor(sdata);
2413 }
2414
2415 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2416 {
2417 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2418 struct ieee80211_local *local = sdata->local;
2419
2420 mutex_lock(&local->mtx);
2421 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2422 goto out;
2423
2424 __ieee80211_stop_poll(sdata);
2425
2426 mutex_lock(&local->iflist_mtx);
2427 ieee80211_recalc_ps(local);
2428 mutex_unlock(&local->iflist_mtx);
2429
2430 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2431 goto out;
2432
2433 /*
2434 * We've received a probe response, but are not sure whether
2435 * we have or will be receiving any beacons or data, so let's
2436 * schedule the timers again, just in case.
2437 */
2438 ieee80211_sta_reset_beacon_monitor(sdata);
2439
2440 mod_timer(&ifmgd->conn_mon_timer,
2441 round_jiffies_up(jiffies +
2442 IEEE80211_CONNECTION_IDLE_TIME));
2443 out:
2444 mutex_unlock(&local->mtx);
2445 }
2446
2447 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2448 struct ieee80211_hdr *hdr,
2449 u16 tx_time)
2450 {
2451 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2452 u16 tid = ieee80211_get_tid(hdr);
2453 int ac = ieee80211_ac_from_tid(tid);
2454 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2455 unsigned long now = jiffies;
2456
2457 if (likely(!tx_tspec->admitted_time))
2458 return;
2459
2460 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2461 tx_tspec->consumed_tx_time = 0;
2462 tx_tspec->time_slice_start = now;
2463
2464 if (tx_tspec->downgraded) {
2465 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2466 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2467 }
2468 }
2469
2470 if (tx_tspec->downgraded)
2471 return;
2472
2473 tx_tspec->consumed_tx_time += tx_time;
2474
2475 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2476 tx_tspec->downgraded = true;
2477 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2478 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2479 }
2480 }
2481
2482 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2483 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2484 {
2485 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2486
2487 if (!ieee80211_is_data(hdr->frame_control))
2488 return;
2489
2490 if (ieee80211_is_any_nullfunc(hdr->frame_control) &&
2491 sdata->u.mgd.probe_send_count > 0) {
2492 if (ack)
2493 ieee80211_sta_reset_conn_monitor(sdata);
2494 else
2495 sdata->u.mgd.nullfunc_failed = true;
2496 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2497 return;
2498 }
2499
2500 if (ack)
2501 ieee80211_sta_reset_conn_monitor(sdata);
2502 }
2503
2504 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
2505 const u8 *src, const u8 *dst,
2506 const u8 *ssid, size_t ssid_len,
2507 struct ieee80211_channel *channel)
2508 {
2509 struct sk_buff *skb;
2510
2511 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
2512 ssid, ssid_len, NULL, 0,
2513 IEEE80211_PROBE_FLAG_DIRECTED);
2514 if (skb)
2515 ieee80211_tx_skb(sdata, skb);
2516 }
2517
2518 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2519 {
2520 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2521 const u8 *ssid;
2522 u8 *dst = ifmgd->associated->bssid;
2523 u8 unicast_limit = max(1, max_probe_tries - 3);
2524 struct sta_info *sta;
2525
2526 /*
2527 * Try sending broadcast probe requests for the last three
2528 * probe requests after the first ones failed since some
2529 * buggy APs only support broadcast probe requests.
2530 */
2531 if (ifmgd->probe_send_count >= unicast_limit)
2532 dst = NULL;
2533
2534 /*
2535 * When the hardware reports an accurate Tx ACK status, it's
2536 * better to send a nullfunc frame instead of a probe request,
2537 * as it will kick us off the AP quickly if we aren't associated
2538 * anymore. The timeout will be reset if the frame is ACKed by
2539 * the AP.
2540 */
2541 ifmgd->probe_send_count++;
2542
2543 if (dst) {
2544 mutex_lock(&sdata->local->sta_mtx);
2545 sta = sta_info_get(sdata, dst);
2546 if (!WARN_ON(!sta))
2547 ieee80211_check_fast_rx(sta);
2548 mutex_unlock(&sdata->local->sta_mtx);
2549 }
2550
2551 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2552 ifmgd->nullfunc_failed = false;
2553 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
2554 ifmgd->probe_send_count--;
2555 else
2556 ieee80211_send_nullfunc(sdata->local, sdata, false);
2557 } else {
2558 int ssid_len;
2559
2560 rcu_read_lock();
2561 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2562 if (WARN_ON_ONCE(ssid == NULL))
2563 ssid_len = 0;
2564 else
2565 ssid_len = ssid[1];
2566
2567 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
2568 ssid + 2, ssid_len,
2569 ifmgd->associated->channel);
2570 rcu_read_unlock();
2571 }
2572
2573 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2574 run_again(sdata, ifmgd->probe_timeout);
2575 }
2576
2577 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2578 bool beacon)
2579 {
2580 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2581 bool already = false;
2582
2583 if (!ieee80211_sdata_running(sdata))
2584 return;
2585
2586 sdata_lock(sdata);
2587
2588 if (!ifmgd->associated)
2589 goto out;
2590
2591 mutex_lock(&sdata->local->mtx);
2592
2593 if (sdata->local->tmp_channel || sdata->local->scanning) {
2594 mutex_unlock(&sdata->local->mtx);
2595 goto out;
2596 }
2597
2598 if (beacon) {
2599 mlme_dbg_ratelimited(sdata,
2600 "detected beacon loss from AP (missed %d beacons) - probing\n",
2601 beacon_loss_count);
2602
2603 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2604 }
2605
2606 /*
2607 * The driver/our work has already reported this event or the
2608 * connection monitoring has kicked in and we have already sent
2609 * a probe request. Or maybe the AP died and the driver keeps
2610 * reporting until we disassociate...
2611 *
2612 * In either case we have to ignore the current call to this
2613 * function (except for setting the correct probe reason bit)
2614 * because otherwise we would reset the timer every time and
2615 * never check whether we received a probe response!
2616 */
2617 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2618 already = true;
2619
2620 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2621
2622 mutex_unlock(&sdata->local->mtx);
2623
2624 if (already)
2625 goto out;
2626
2627 mutex_lock(&sdata->local->iflist_mtx);
2628 ieee80211_recalc_ps(sdata->local);
2629 mutex_unlock(&sdata->local->iflist_mtx);
2630
2631 ifmgd->probe_send_count = 0;
2632 ieee80211_mgd_probe_ap_send(sdata);
2633 out:
2634 sdata_unlock(sdata);
2635 }
2636
2637 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2638 struct ieee80211_vif *vif)
2639 {
2640 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2641 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2642 struct cfg80211_bss *cbss;
2643 struct sk_buff *skb;
2644 const u8 *ssid;
2645 int ssid_len;
2646
2647 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2648 return NULL;
2649
2650 sdata_assert_lock(sdata);
2651
2652 if (ifmgd->associated)
2653 cbss = ifmgd->associated;
2654 else if (ifmgd->auth_data)
2655 cbss = ifmgd->auth_data->bss;
2656 else if (ifmgd->assoc_data)
2657 cbss = ifmgd->assoc_data->bss;
2658 else
2659 return NULL;
2660
2661 rcu_read_lock();
2662 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2663 if (WARN_ONCE(!ssid || ssid[1] > IEEE80211_MAX_SSID_LEN,
2664 "invalid SSID element (len=%d)", ssid ? ssid[1] : -1))
2665 ssid_len = 0;
2666 else
2667 ssid_len = ssid[1];
2668
2669 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2670 (u32) -1, cbss->channel,
2671 ssid + 2, ssid_len,
2672 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
2673 rcu_read_unlock();
2674
2675 return skb;
2676 }
2677 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2678
2679 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2680 const u8 *buf, size_t len, bool tx,
2681 u16 reason)
2682 {
2683 struct ieee80211_event event = {
2684 .type = MLME_EVENT,
2685 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2686 .u.mlme.reason = reason,
2687 };
2688
2689 if (tx)
2690 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2691 else
2692 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2693
2694 drv_event_callback(sdata->local, sdata, &event);
2695 }
2696
2697 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2698 {
2699 struct ieee80211_local *local = sdata->local;
2700 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2701 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2702 bool tx;
2703
2704 sdata_lock(sdata);
2705 if (!ifmgd->associated) {
2706 sdata_unlock(sdata);
2707 return;
2708 }
2709
2710 tx = !sdata->csa_block_tx;
2711
2712 /* AP is probably out of range (or not reachable for another reason) so
2713 * remove the bss struct for that AP.
2714 */
2715 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2716
2717 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2718 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2719 tx, frame_buf);
2720 mutex_lock(&local->mtx);
2721 sdata->vif.csa_active = false;
2722 ifmgd->csa_waiting_bcn = false;
2723 if (sdata->csa_block_tx) {
2724 ieee80211_wake_vif_queues(local, sdata,
2725 IEEE80211_QUEUE_STOP_REASON_CSA);
2726 sdata->csa_block_tx = false;
2727 }
2728 mutex_unlock(&local->mtx);
2729
2730 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
2731 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2732
2733 sdata_unlock(sdata);
2734 }
2735
2736 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2737 {
2738 struct ieee80211_sub_if_data *sdata =
2739 container_of(work, struct ieee80211_sub_if_data,
2740 u.mgd.beacon_connection_loss_work);
2741 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2742
2743 if (ifmgd->associated)
2744 ifmgd->beacon_loss_count++;
2745
2746 if (ifmgd->connection_loss) {
2747 sdata_info(sdata, "Connection to AP %pM lost\n",
2748 ifmgd->bssid);
2749 __ieee80211_disconnect(sdata);
2750 } else {
2751 ieee80211_mgd_probe_ap(sdata, true);
2752 }
2753 }
2754
2755 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2756 {
2757 struct ieee80211_sub_if_data *sdata =
2758 container_of(work, struct ieee80211_sub_if_data,
2759 u.mgd.csa_connection_drop_work);
2760
2761 __ieee80211_disconnect(sdata);
2762 }
2763
2764 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2765 {
2766 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2767 struct ieee80211_hw *hw = &sdata->local->hw;
2768
2769 trace_api_beacon_loss(sdata);
2770
2771 sdata->u.mgd.connection_loss = false;
2772 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2773 }
2774 EXPORT_SYMBOL(ieee80211_beacon_loss);
2775
2776 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2777 {
2778 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2779 struct ieee80211_hw *hw = &sdata->local->hw;
2780
2781 trace_api_connection_loss(sdata);
2782
2783 sdata->u.mgd.connection_loss = true;
2784 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2785 }
2786 EXPORT_SYMBOL(ieee80211_connection_loss);
2787
2788
2789 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2790 bool assoc)
2791 {
2792 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2793
2794 sdata_assert_lock(sdata);
2795
2796 if (!assoc) {
2797 /*
2798 * we are not authenticated yet, the only timer that could be
2799 * running is the timeout for the authentication response which
2800 * which is not relevant anymore.
2801 */
2802 del_timer_sync(&sdata->u.mgd.timer);
2803 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2804
2805 eth_zero_addr(sdata->u.mgd.bssid);
2806 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2807 sdata->u.mgd.flags = 0;
2808 mutex_lock(&sdata->local->mtx);
2809 ieee80211_vif_release_channel(sdata);
2810 mutex_unlock(&sdata->local->mtx);
2811 }
2812
2813 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2814 kfree(auth_data);
2815 sdata->u.mgd.auth_data = NULL;
2816 }
2817
2818 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2819 bool assoc, bool abandon)
2820 {
2821 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2822
2823 sdata_assert_lock(sdata);
2824
2825 if (!assoc) {
2826 /*
2827 * we are not associated yet, the only timer that could be
2828 * running is the timeout for the association response which
2829 * which is not relevant anymore.
2830 */
2831 del_timer_sync(&sdata->u.mgd.timer);
2832 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2833
2834 eth_zero_addr(sdata->u.mgd.bssid);
2835 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2836 sdata->u.mgd.flags = 0;
2837 sdata->vif.mu_mimo_owner = false;
2838
2839 mutex_lock(&sdata->local->mtx);
2840 ieee80211_vif_release_channel(sdata);
2841 mutex_unlock(&sdata->local->mtx);
2842
2843 if (abandon)
2844 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2845 }
2846
2847 kfree(assoc_data);
2848 sdata->u.mgd.assoc_data = NULL;
2849 }
2850
2851 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2852 struct ieee80211_mgmt *mgmt, size_t len)
2853 {
2854 struct ieee80211_local *local = sdata->local;
2855 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2856 u8 *pos;
2857 struct ieee802_11_elems elems;
2858 u32 tx_flags = 0;
2859
2860 pos = mgmt->u.auth.variable;
2861 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
2862 mgmt->bssid, auth_data->bss->bssid);
2863 if (!elems.challenge)
2864 return;
2865 auth_data->expected_transaction = 4;
2866 drv_mgd_prepare_tx(sdata->local, sdata, 0);
2867 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2868 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2869 IEEE80211_TX_INTFL_MLME_CONN_TX;
2870 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2871 elems.challenge - 2, elems.challenge_len + 2,
2872 auth_data->bss->bssid, auth_data->bss->bssid,
2873 auth_data->key, auth_data->key_len,
2874 auth_data->key_idx, tx_flags);
2875 }
2876
2877 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata,
2878 const u8 *bssid)
2879 {
2880 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2881 struct sta_info *sta;
2882 bool result = true;
2883
2884 sdata_info(sdata, "authenticated\n");
2885 ifmgd->auth_data->done = true;
2886 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2887 ifmgd->auth_data->timeout_started = true;
2888 run_again(sdata, ifmgd->auth_data->timeout);
2889
2890 /* move station state to auth */
2891 mutex_lock(&sdata->local->sta_mtx);
2892 sta = sta_info_get(sdata, bssid);
2893 if (!sta) {
2894 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2895 result = false;
2896 goto out;
2897 }
2898 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2899 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2900 result = false;
2901 goto out;
2902 }
2903
2904 out:
2905 mutex_unlock(&sdata->local->sta_mtx);
2906 return result;
2907 }
2908
2909 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2910 struct ieee80211_mgmt *mgmt, size_t len)
2911 {
2912 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2913 u8 bssid[ETH_ALEN];
2914 u16 auth_alg, auth_transaction, status_code;
2915 struct ieee80211_event event = {
2916 .type = MLME_EVENT,
2917 .u.mlme.data = AUTH_EVENT,
2918 };
2919
2920 sdata_assert_lock(sdata);
2921
2922 if (len < 24 + 6)
2923 return;
2924
2925 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2926 return;
2927
2928 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2929
2930 if (!ether_addr_equal(bssid, mgmt->bssid))
2931 return;
2932
2933 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2934 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2935 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2936
2937 if (auth_alg != ifmgd->auth_data->algorithm ||
2938 (auth_alg != WLAN_AUTH_SAE &&
2939 auth_transaction != ifmgd->auth_data->expected_transaction) ||
2940 (auth_alg == WLAN_AUTH_SAE &&
2941 (auth_transaction < ifmgd->auth_data->expected_transaction ||
2942 auth_transaction > 2))) {
2943 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2944 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2945 auth_transaction,
2946 ifmgd->auth_data->expected_transaction);
2947 return;
2948 }
2949
2950 if (status_code != WLAN_STATUS_SUCCESS) {
2951 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2952 mgmt->sa, status_code);
2953 ieee80211_destroy_auth_data(sdata, false);
2954 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2955 event.u.mlme.status = MLME_DENIED;
2956 event.u.mlme.reason = status_code;
2957 drv_event_callback(sdata->local, sdata, &event);
2958 return;
2959 }
2960
2961 switch (ifmgd->auth_data->algorithm) {
2962 case WLAN_AUTH_OPEN:
2963 case WLAN_AUTH_LEAP:
2964 case WLAN_AUTH_FT:
2965 case WLAN_AUTH_SAE:
2966 case WLAN_AUTH_FILS_SK:
2967 case WLAN_AUTH_FILS_SK_PFS:
2968 case WLAN_AUTH_FILS_PK:
2969 break;
2970 case WLAN_AUTH_SHARED_KEY:
2971 if (ifmgd->auth_data->expected_transaction != 4) {
2972 ieee80211_auth_challenge(sdata, mgmt, len);
2973 /* need another frame */
2974 return;
2975 }
2976 break;
2977 default:
2978 WARN_ONCE(1, "invalid auth alg %d",
2979 ifmgd->auth_data->algorithm);
2980 return;
2981 }
2982
2983 event.u.mlme.status = MLME_SUCCESS;
2984 drv_event_callback(sdata->local, sdata, &event);
2985 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
2986 (auth_transaction == 2 &&
2987 ifmgd->auth_data->expected_transaction == 2)) {
2988 if (!ieee80211_mark_sta_auth(sdata, bssid))
2989 return; /* ignore frame -- wait for timeout */
2990 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2991 auth_transaction == 2) {
2992 sdata_info(sdata, "SAE peer confirmed\n");
2993 ifmgd->auth_data->peer_confirmed = true;
2994 }
2995
2996 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2997 }
2998
2999 #define case_WLAN(type) \
3000 case WLAN_REASON_##type: return #type
3001
3002 const char *ieee80211_get_reason_code_string(u16 reason_code)
3003 {
3004 switch (reason_code) {
3005 case_WLAN(UNSPECIFIED);
3006 case_WLAN(PREV_AUTH_NOT_VALID);
3007 case_WLAN(DEAUTH_LEAVING);
3008 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
3009 case_WLAN(DISASSOC_AP_BUSY);
3010 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
3011 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
3012 case_WLAN(DISASSOC_STA_HAS_LEFT);
3013 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
3014 case_WLAN(DISASSOC_BAD_POWER);
3015 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
3016 case_WLAN(INVALID_IE);
3017 case_WLAN(MIC_FAILURE);
3018 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
3019 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
3020 case_WLAN(IE_DIFFERENT);
3021 case_WLAN(INVALID_GROUP_CIPHER);
3022 case_WLAN(INVALID_PAIRWISE_CIPHER);
3023 case_WLAN(INVALID_AKMP);
3024 case_WLAN(UNSUPP_RSN_VERSION);
3025 case_WLAN(INVALID_RSN_IE_CAP);
3026 case_WLAN(IEEE8021X_FAILED);
3027 case_WLAN(CIPHER_SUITE_REJECTED);
3028 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
3029 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
3030 case_WLAN(DISASSOC_LOW_ACK);
3031 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
3032 case_WLAN(QSTA_LEAVE_QBSS);
3033 case_WLAN(QSTA_NOT_USE);
3034 case_WLAN(QSTA_REQUIRE_SETUP);
3035 case_WLAN(QSTA_TIMEOUT);
3036 case_WLAN(QSTA_CIPHER_NOT_SUPP);
3037 case_WLAN(MESH_PEER_CANCELED);
3038 case_WLAN(MESH_MAX_PEERS);
3039 case_WLAN(MESH_CONFIG);
3040 case_WLAN(MESH_CLOSE);
3041 case_WLAN(MESH_MAX_RETRIES);
3042 case_WLAN(MESH_CONFIRM_TIMEOUT);
3043 case_WLAN(MESH_INVALID_GTK);
3044 case_WLAN(MESH_INCONSISTENT_PARAM);
3045 case_WLAN(MESH_INVALID_SECURITY);
3046 case_WLAN(MESH_PATH_ERROR);
3047 case_WLAN(MESH_PATH_NOFORWARD);
3048 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
3049 case_WLAN(MAC_EXISTS_IN_MBSS);
3050 case_WLAN(MESH_CHAN_REGULATORY);
3051 case_WLAN(MESH_CHAN);
3052 default: return "<unknown>";
3053 }
3054 }
3055
3056 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
3057 struct ieee80211_mgmt *mgmt, size_t len)
3058 {
3059 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3060 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
3061
3062 sdata_assert_lock(sdata);
3063
3064 if (len < 24 + 2)
3065 return;
3066
3067 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3068 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3069 return;
3070 }
3071
3072 if (ifmgd->associated &&
3073 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
3074 const u8 *bssid = ifmgd->associated->bssid;
3075
3076 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
3077 bssid, reason_code,
3078 ieee80211_get_reason_code_string(reason_code));
3079
3080 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3081
3082 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
3083 reason_code);
3084 return;
3085 }
3086
3087 if (ifmgd->assoc_data &&
3088 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3089 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
3090
3091 sdata_info(sdata,
3092 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
3093 bssid, reason_code,
3094 ieee80211_get_reason_code_string(reason_code));
3095
3096 ieee80211_destroy_assoc_data(sdata, false, true);
3097
3098 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3099 return;
3100 }
3101 }
3102
3103
3104 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
3105 struct ieee80211_mgmt *mgmt, size_t len)
3106 {
3107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3108 u16 reason_code;
3109
3110 sdata_assert_lock(sdata);
3111
3112 if (len < 24 + 2)
3113 return;
3114
3115 if (!ifmgd->associated ||
3116 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3117 return;
3118
3119 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
3120
3121 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3122 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3123 return;
3124 }
3125
3126 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
3127 mgmt->sa, reason_code,
3128 ieee80211_get_reason_code_string(reason_code));
3129
3130 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3131
3132 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
3133 }
3134
3135 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
3136 u8 *supp_rates, unsigned int supp_rates_len,
3137 u32 *rates, u32 *basic_rates,
3138 bool *have_higher_than_11mbit,
3139 int *min_rate, int *min_rate_index,
3140 int shift)
3141 {
3142 int i, j;
3143
3144 for (i = 0; i < supp_rates_len; i++) {
3145 int rate = supp_rates[i] & 0x7f;
3146 bool is_basic = !!(supp_rates[i] & 0x80);
3147
3148 if ((rate * 5 * (1 << shift)) > 110)
3149 *have_higher_than_11mbit = true;
3150
3151 /*
3152 * Skip HT and VHT BSS membership selectors since they're not
3153 * rates.
3154 *
3155 * Note: Even though the membership selector and the basic
3156 * rate flag share the same bit, they are not exactly
3157 * the same.
3158 */
3159 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3160 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
3161 continue;
3162
3163 for (j = 0; j < sband->n_bitrates; j++) {
3164 struct ieee80211_rate *br;
3165 int brate;
3166
3167 br = &sband->bitrates[j];
3168
3169 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3170 if (brate == rate) {
3171 *rates |= BIT(j);
3172 if (is_basic)
3173 *basic_rates |= BIT(j);
3174 if ((rate * 5) < *min_rate) {
3175 *min_rate = rate * 5;
3176 *min_rate_index = j;
3177 }
3178 break;
3179 }
3180 }
3181 }
3182 }
3183
3184 static bool ieee80211_twt_req_supported(const struct sta_info *sta,
3185 const struct ieee802_11_elems *elems)
3186 {
3187 if (elems->ext_capab_len < 10)
3188 return false;
3189
3190 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
3191 return false;
3192
3193 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] &
3194 IEEE80211_HE_MAC_CAP0_TWT_RES;
3195 }
3196
3197 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata,
3198 struct sta_info *sta,
3199 struct ieee802_11_elems *elems)
3200 {
3201 bool twt = ieee80211_twt_req_supported(sta, elems);
3202
3203 if (sdata->vif.bss_conf.twt_requester != twt) {
3204 sdata->vif.bss_conf.twt_requester = twt;
3205 return BSS_CHANGED_TWT;
3206 }
3207 return 0;
3208 }
3209
3210 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
3211 struct cfg80211_bss *cbss,
3212 struct ieee80211_mgmt *mgmt, size_t len,
3213 struct ieee802_11_elems *elems)
3214 {
3215 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3216 struct ieee80211_local *local = sdata->local;
3217 struct ieee80211_supported_band *sband;
3218 struct sta_info *sta;
3219 u16 capab_info, aid;
3220 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3221 const struct cfg80211_bss_ies *bss_ies = NULL;
3222 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3223 u32 changed = 0;
3224 int err;
3225 bool ret;
3226
3227 /* AssocResp and ReassocResp have identical structure */
3228
3229 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3230 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3231
3232 /*
3233 * The 5 MSB of the AID field are reserved
3234 * (802.11-2016 9.4.1.8 AID field)
3235 */
3236 aid &= 0x7ff;
3237
3238 ifmgd->broken_ap = false;
3239
3240 if (aid == 0 || aid > IEEE80211_MAX_AID) {
3241 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
3242 aid);
3243 aid = 0;
3244 ifmgd->broken_ap = true;
3245 }
3246
3247 if (!elems->supp_rates) {
3248 sdata_info(sdata, "no SuppRates element in AssocResp\n");
3249 return false;
3250 }
3251
3252 ifmgd->aid = aid;
3253 ifmgd->tdls_chan_switch_prohibited =
3254 elems->ext_capab && elems->ext_capab_len >= 5 &&
3255 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3256
3257 /*
3258 * Some APs are erroneously not including some information in their
3259 * (re)association response frames. Try to recover by using the data
3260 * from the beacon or probe response. This seems to afflict mobile
3261 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
3262 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
3263 */
3264 if ((assoc_data->wmm && !elems->wmm_param) ||
3265 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3266 (!elems->ht_cap_elem || !elems->ht_operation)) ||
3267 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3268 (!elems->vht_cap_elem || !elems->vht_operation))) {
3269 const struct cfg80211_bss_ies *ies;
3270 struct ieee802_11_elems bss_elems;
3271
3272 rcu_read_lock();
3273 ies = rcu_dereference(cbss->ies);
3274 if (ies)
3275 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3276 GFP_ATOMIC);
3277 rcu_read_unlock();
3278 if (!bss_ies)
3279 return false;
3280
3281 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
3282 false, &bss_elems,
3283 mgmt->bssid,
3284 assoc_data->bss->bssid);
3285 if (assoc_data->wmm &&
3286 !elems->wmm_param && bss_elems.wmm_param) {
3287 elems->wmm_param = bss_elems.wmm_param;
3288 sdata_info(sdata,
3289 "AP bug: WMM param missing from AssocResp\n");
3290 }
3291
3292 /*
3293 * Also check if we requested HT/VHT, otherwise the AP doesn't
3294 * have to include the IEs in the (re)association response.
3295 */
3296 if (!elems->ht_cap_elem && bss_elems.ht_cap_elem &&
3297 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3298 elems->ht_cap_elem = bss_elems.ht_cap_elem;
3299 sdata_info(sdata,
3300 "AP bug: HT capability missing from AssocResp\n");
3301 }
3302 if (!elems->ht_operation && bss_elems.ht_operation &&
3303 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3304 elems->ht_operation = bss_elems.ht_operation;
3305 sdata_info(sdata,
3306 "AP bug: HT operation missing from AssocResp\n");
3307 }
3308 if (!elems->vht_cap_elem && bss_elems.vht_cap_elem &&
3309 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3310 elems->vht_cap_elem = bss_elems.vht_cap_elem;
3311 sdata_info(sdata,
3312 "AP bug: VHT capa missing from AssocResp\n");
3313 }
3314 if (!elems->vht_operation && bss_elems.vht_operation &&
3315 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3316 elems->vht_operation = bss_elems.vht_operation;
3317 sdata_info(sdata,
3318 "AP bug: VHT operation missing from AssocResp\n");
3319 }
3320 }
3321
3322 /*
3323 * We previously checked these in the beacon/probe response, so
3324 * they should be present here. This is just a safety net.
3325 */
3326 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3327 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) {
3328 sdata_info(sdata,
3329 "HT AP is missing WMM params or HT capability/operation\n");
3330 ret = false;
3331 goto out;
3332 }
3333
3334 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3335 (!elems->vht_cap_elem || !elems->vht_operation)) {
3336 sdata_info(sdata,
3337 "VHT AP is missing VHT capability/operation\n");
3338 ret = false;
3339 goto out;
3340 }
3341
3342 mutex_lock(&sdata->local->sta_mtx);
3343 /*
3344 * station info was already allocated and inserted before
3345 * the association and should be available to us
3346 */
3347 sta = sta_info_get(sdata, cbss->bssid);
3348 if (WARN_ON(!sta)) {
3349 mutex_unlock(&sdata->local->sta_mtx);
3350 ret = false;
3351 goto out;
3352 }
3353
3354 sband = ieee80211_get_sband(sdata);
3355 if (!sband) {
3356 mutex_unlock(&sdata->local->sta_mtx);
3357 ret = false;
3358 goto out;
3359 }
3360
3361 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3362 (!elems->he_cap || !elems->he_operation)) {
3363 mutex_unlock(&sdata->local->sta_mtx);
3364 sdata_info(sdata,
3365 "HE AP is missing HE capability/operation\n");
3366 ret = false;
3367 goto out;
3368 }
3369
3370 /* Set up internal HT/VHT capabilities */
3371 if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3372 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3373 elems->ht_cap_elem, sta);
3374
3375 if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3376 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3377 elems->vht_cap_elem, sta);
3378
3379 if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3380 elems->he_cap) {
3381 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
3382 elems->he_cap,
3383 elems->he_cap_len,
3384 sta);
3385
3386 bss_conf->he_support = sta->sta.he_cap.has_he;
3387 changed |= ieee80211_recalc_twt_req(sdata, sta, elems);
3388 } else {
3389 bss_conf->he_support = false;
3390 bss_conf->twt_requester = false;
3391 }
3392
3393 if (bss_conf->he_support) {
3394 bss_conf->he_bss_color.color =
3395 le32_get_bits(elems->he_operation->he_oper_params,
3396 IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
3397 bss_conf->he_bss_color.partial =
3398 le32_get_bits(elems->he_operation->he_oper_params,
3399 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR);
3400 bss_conf->he_bss_color.disabled =
3401 le32_get_bits(elems->he_operation->he_oper_params,
3402 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3403 changed |= BSS_CHANGED_HE_BSS_COLOR;
3404
3405 bss_conf->htc_trig_based_pkt_ext =
3406 le32_get_bits(elems->he_operation->he_oper_params,
3407 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
3408 bss_conf->frame_time_rts_th =
3409 le32_get_bits(elems->he_operation->he_oper_params,
3410 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3411
3412 bss_conf->multi_sta_back_32bit =
3413 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3414 IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP;
3415
3416 bss_conf->ack_enabled =
3417 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3418 IEEE80211_HE_MAC_CAP2_ACK_EN;
3419
3420 bss_conf->uora_exists = !!elems->uora_element;
3421 if (elems->uora_element)
3422 bss_conf->uora_ocw_range = elems->uora_element[0];
3423
3424 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation);
3425 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr);
3426 /* TODO: OPEN: what happens if BSS color disable is set? */
3427 }
3428
3429 if (cbss->transmitted_bss) {
3430 bss_conf->nontransmitted = true;
3431 ether_addr_copy(bss_conf->transmitter_bssid,
3432 cbss->transmitted_bss->bssid);
3433 bss_conf->bssid_indicator = cbss->max_bssid_indicator;
3434 bss_conf->bssid_index = cbss->bssid_index;
3435 }
3436
3437 /*
3438 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3439 * in their association response, so ignore that data for our own
3440 * configuration. If it changed since the last beacon, we'll get the
3441 * next beacon and update then.
3442 */
3443
3444 /*
3445 * If an operating mode notification IE is present, override the
3446 * NSS calculation (that would be done in rate_control_rate_init())
3447 * and use the # of streams from that element.
3448 */
3449 if (elems->opmode_notif &&
3450 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3451 u8 nss;
3452
3453 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3454 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3455 nss += 1;
3456 sta->sta.rx_nss = nss;
3457 }
3458
3459 rate_control_rate_init(sta);
3460
3461 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3462 set_sta_flag(sta, WLAN_STA_MFP);
3463 sta->sta.mfp = true;
3464 } else {
3465 sta->sta.mfp = false;
3466 }
3467
3468 sta->sta.wme = elems->wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3469
3470 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3471 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3472 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3473 if (err) {
3474 sdata_info(sdata,
3475 "failed to move station %pM to desired state\n",
3476 sta->sta.addr);
3477 WARN_ON(__sta_info_destroy(sta));
3478 mutex_unlock(&sdata->local->sta_mtx);
3479 ret = false;
3480 goto out;
3481 }
3482
3483 mutex_unlock(&sdata->local->sta_mtx);
3484
3485 /*
3486 * Always handle WMM once after association regardless
3487 * of the first value the AP uses. Setting -1 here has
3488 * that effect because the AP values is an unsigned
3489 * 4-bit value.
3490 */
3491 ifmgd->wmm_last_param_set = -1;
3492 ifmgd->mu_edca_last_param_set = -1;
3493
3494 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3495 ieee80211_set_wmm_default(sdata, false, false);
3496 } else if (!ieee80211_sta_wmm_params(local, sdata, elems->wmm_param,
3497 elems->wmm_param_len,
3498 elems->mu_edca_param_set)) {
3499 /* still enable QoS since we might have HT/VHT */
3500 ieee80211_set_wmm_default(sdata, false, true);
3501 /* set the disable-WMM flag in this case to disable
3502 * tracking WMM parameter changes in the beacon if
3503 * the parameters weren't actually valid. Doing so
3504 * avoids changing parameters very strangely when
3505 * the AP is going back and forth between valid and
3506 * invalid parameters.
3507 */
3508 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3509 }
3510 changed |= BSS_CHANGED_QOS;
3511
3512 if (elems->max_idle_period_ie) {
3513 bss_conf->max_idle_period =
3514 le16_to_cpu(elems->max_idle_period_ie->max_idle_period);
3515 bss_conf->protected_keep_alive =
3516 !!(elems->max_idle_period_ie->idle_options &
3517 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3518 changed |= BSS_CHANGED_KEEP_ALIVE;
3519 } else {
3520 bss_conf->max_idle_period = 0;
3521 bss_conf->protected_keep_alive = false;
3522 }
3523
3524 /* set AID and assoc capability,
3525 * ieee80211_set_associated() will tell the driver */
3526 bss_conf->aid = aid;
3527 bss_conf->assoc_capability = capab_info;
3528 ieee80211_set_associated(sdata, cbss, changed);
3529
3530 /*
3531 * If we're using 4-addr mode, let the AP know that we're
3532 * doing so, so that it can create the STA VLAN on its side
3533 */
3534 if (ifmgd->use_4addr)
3535 ieee80211_send_4addr_nullfunc(local, sdata);
3536
3537 /*
3538 * Start timer to probe the connection to the AP now.
3539 * Also start the timer that will detect beacon loss.
3540 */
3541 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3542 ieee80211_sta_reset_beacon_monitor(sdata);
3543
3544 ret = true;
3545 out:
3546 kfree(bss_ies);
3547 return ret;
3548 }
3549
3550 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3551 struct ieee80211_mgmt *mgmt,
3552 size_t len)
3553 {
3554 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3555 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3556 u16 capab_info, status_code, aid;
3557 struct ieee802_11_elems elems;
3558 int ac, uapsd_queues = -1;
3559 u8 *pos;
3560 bool reassoc;
3561 struct cfg80211_bss *bss;
3562 struct ieee80211_event event = {
3563 .type = MLME_EVENT,
3564 .u.mlme.data = ASSOC_EVENT,
3565 };
3566
3567 sdata_assert_lock(sdata);
3568
3569 if (!assoc_data)
3570 return;
3571 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3572 return;
3573
3574 /*
3575 * AssocResp and ReassocResp have identical structure, so process both
3576 * of them in this function.
3577 */
3578
3579 if (len < 24 + 6)
3580 return;
3581
3582 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
3583 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3584 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3585 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3586
3587 sdata_info(sdata,
3588 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3589 reassoc ? "Rea" : "A", mgmt->sa,
3590 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3591
3592 if (assoc_data->fils_kek_len &&
3593 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3594 return;
3595
3596 pos = mgmt->u.assoc_resp.variable;
3597 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
3598 mgmt->bssid, assoc_data->bss->bssid);
3599
3600 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3601 elems.timeout_int &&
3602 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3603 u32 tu, ms;
3604 tu = le32_to_cpu(elems.timeout_int->value);
3605 ms = tu * 1024 / 1000;
3606 sdata_info(sdata,
3607 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3608 mgmt->sa, tu, ms);
3609 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3610 assoc_data->timeout_started = true;
3611 if (ms > IEEE80211_ASSOC_TIMEOUT)
3612 run_again(sdata, assoc_data->timeout);
3613 return;
3614 }
3615
3616 bss = assoc_data->bss;
3617
3618 if (status_code != WLAN_STATUS_SUCCESS) {
3619 sdata_info(sdata, "%pM denied association (code=%d)\n",
3620 mgmt->sa, status_code);
3621 ieee80211_destroy_assoc_data(sdata, false, false);
3622 event.u.mlme.status = MLME_DENIED;
3623 event.u.mlme.reason = status_code;
3624 drv_event_callback(sdata->local, sdata, &event);
3625 } else {
3626 if (!ieee80211_assoc_success(sdata, bss, mgmt, len, &elems)) {
3627 /* oops -- internal error -- send timeout for now */
3628 ieee80211_destroy_assoc_data(sdata, false, false);
3629 cfg80211_assoc_timeout(sdata->dev, bss);
3630 return;
3631 }
3632 event.u.mlme.status = MLME_SUCCESS;
3633 drv_event_callback(sdata->local, sdata, &event);
3634 sdata_info(sdata, "associated\n");
3635
3636 /*
3637 * destroy assoc_data afterwards, as otherwise an idle
3638 * recalc after assoc_data is NULL but before associated
3639 * is set can cause the interface to go idle
3640 */
3641 ieee80211_destroy_assoc_data(sdata, true, false);
3642
3643 /* get uapsd queues configuration */
3644 uapsd_queues = 0;
3645 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3646 if (sdata->tx_conf[ac].uapsd)
3647 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3648 }
3649
3650 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues,
3651 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len);
3652 }
3653
3654 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3655 struct ieee80211_mgmt *mgmt, size_t len,
3656 struct ieee80211_rx_status *rx_status)
3657 {
3658 struct ieee80211_local *local = sdata->local;
3659 struct ieee80211_bss *bss;
3660 struct ieee80211_channel *channel;
3661
3662 sdata_assert_lock(sdata);
3663
3664 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3665 if (!channel)
3666 return;
3667
3668 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
3669 if (bss) {
3670 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3671 ieee80211_rx_bss_put(local, bss);
3672 }
3673 }
3674
3675
3676 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3677 struct sk_buff *skb)
3678 {
3679 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3680 struct ieee80211_if_managed *ifmgd;
3681 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3682 struct ieee80211_channel *channel;
3683 size_t baselen, len = skb->len;
3684
3685 ifmgd = &sdata->u.mgd;
3686
3687 sdata_assert_lock(sdata);
3688
3689 /*
3690 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2:
3691 * "If a 6 GHz AP receives a Probe Request frame and responds with
3692 * a Probe Response frame [..], the Address 1 field of the Probe
3693 * Response frame shall be set to the broadcast address [..]"
3694 * So, on 6GHz band we should also accept broadcast responses.
3695 */
3696 channel = ieee80211_get_channel(sdata->local->hw.wiphy,
3697 rx_status->freq);
3698 if (!channel)
3699 return;
3700
3701 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
3702 (channel->band != NL80211_BAND_6GHZ ||
3703 !is_broadcast_ether_addr(mgmt->da)))
3704 return; /* ignore ProbeResp to foreign address */
3705
3706 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3707 if (baselen > len)
3708 return;
3709
3710 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3711
3712 if (ifmgd->associated &&
3713 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3714 ieee80211_reset_ap_probe(sdata);
3715 }
3716
3717 /*
3718 * This is the canonical list of information elements we care about,
3719 * the filter code also gives us all changes to the Microsoft OUI
3720 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3721 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3722 * changes to requested client power.
3723 *
3724 * We implement beacon filtering in software since that means we can
3725 * avoid processing the frame here and in cfg80211, and userspace
3726 * will not be able to tell whether the hardware supports it or not.
3727 *
3728 * XXX: This list needs to be dynamic -- userspace needs to be able to
3729 * add items it requires. It also needs to be able to tell us to
3730 * look out for other vendor IEs.
3731 */
3732 static const u64 care_about_ies =
3733 (1ULL << WLAN_EID_COUNTRY) |
3734 (1ULL << WLAN_EID_ERP_INFO) |
3735 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3736 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3737 (1ULL << WLAN_EID_HT_CAPABILITY) |
3738 (1ULL << WLAN_EID_HT_OPERATION) |
3739 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3740
3741 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata,
3742 struct ieee80211_if_managed *ifmgd,
3743 struct ieee80211_bss_conf *bss_conf,
3744 struct ieee80211_local *local,
3745 struct ieee80211_rx_status *rx_status)
3746 {
3747 /* Track average RSSI from the Beacon frames of the current AP */
3748
3749 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3750 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3751 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3752 ifmgd->last_cqm_event_signal = 0;
3753 ifmgd->count_beacon_signal = 1;
3754 ifmgd->last_ave_beacon_signal = 0;
3755 } else {
3756 ifmgd->count_beacon_signal++;
3757 }
3758
3759 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3760
3761 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3762 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3763 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3764 int last_sig = ifmgd->last_ave_beacon_signal;
3765 struct ieee80211_event event = {
3766 .type = RSSI_EVENT,
3767 };
3768
3769 /*
3770 * if signal crosses either of the boundaries, invoke callback
3771 * with appropriate parameters
3772 */
3773 if (sig > ifmgd->rssi_max_thold &&
3774 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3775 ifmgd->last_ave_beacon_signal = sig;
3776 event.u.rssi.data = RSSI_EVENT_HIGH;
3777 drv_event_callback(local, sdata, &event);
3778 } else if (sig < ifmgd->rssi_min_thold &&
3779 (last_sig >= ifmgd->rssi_max_thold ||
3780 last_sig == 0)) {
3781 ifmgd->last_ave_beacon_signal = sig;
3782 event.u.rssi.data = RSSI_EVENT_LOW;
3783 drv_event_callback(local, sdata, &event);
3784 }
3785 }
3786
3787 if (bss_conf->cqm_rssi_thold &&
3788 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3789 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3790 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3791 int last_event = ifmgd->last_cqm_event_signal;
3792 int thold = bss_conf->cqm_rssi_thold;
3793 int hyst = bss_conf->cqm_rssi_hyst;
3794
3795 if (sig < thold &&
3796 (last_event == 0 || sig < last_event - hyst)) {
3797 ifmgd->last_cqm_event_signal = sig;
3798 ieee80211_cqm_rssi_notify(
3799 &sdata->vif,
3800 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3801 sig, GFP_KERNEL);
3802 } else if (sig > thold &&
3803 (last_event == 0 || sig > last_event + hyst)) {
3804 ifmgd->last_cqm_event_signal = sig;
3805 ieee80211_cqm_rssi_notify(
3806 &sdata->vif,
3807 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3808 sig, GFP_KERNEL);
3809 }
3810 }
3811
3812 if (bss_conf->cqm_rssi_low &&
3813 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3814 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3815 int last_event = ifmgd->last_cqm_event_signal;
3816 int low = bss_conf->cqm_rssi_low;
3817 int high = bss_conf->cqm_rssi_high;
3818
3819 if (sig < low &&
3820 (last_event == 0 || last_event >= low)) {
3821 ifmgd->last_cqm_event_signal = sig;
3822 ieee80211_cqm_rssi_notify(
3823 &sdata->vif,
3824 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3825 sig, GFP_KERNEL);
3826 } else if (sig > high &&
3827 (last_event == 0 || last_event <= high)) {
3828 ifmgd->last_cqm_event_signal = sig;
3829 ieee80211_cqm_rssi_notify(
3830 &sdata->vif,
3831 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3832 sig, GFP_KERNEL);
3833 }
3834 }
3835 }
3836
3837 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
3838 struct cfg80211_bss *bss)
3839 {
3840 if (ether_addr_equal(tx_bssid, bss->bssid))
3841 return true;
3842 if (!bss->transmitted_bss)
3843 return false;
3844 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid);
3845 }
3846
3847 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3848 struct ieee80211_mgmt *mgmt, size_t len,
3849 struct ieee80211_rx_status *rx_status)
3850 {
3851 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3852 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3853 size_t baselen;
3854 struct ieee802_11_elems elems;
3855 struct ieee80211_local *local = sdata->local;
3856 struct ieee80211_chanctx_conf *chanctx_conf;
3857 struct ieee80211_channel *chan;
3858 struct sta_info *sta;
3859 u32 changed = 0;
3860 bool erp_valid;
3861 u8 erp_value = 0;
3862 u32 ncrc;
3863 u8 *bssid;
3864 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3865
3866 sdata_assert_lock(sdata);
3867
3868 /* Process beacon from the current BSS */
3869 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3870 if (baselen > len)
3871 return;
3872
3873 rcu_read_lock();
3874 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3875 if (!chanctx_conf) {
3876 rcu_read_unlock();
3877 return;
3878 }
3879
3880 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3881 rcu_read_unlock();
3882 return;
3883 }
3884 chan = chanctx_conf->def.chan;
3885 rcu_read_unlock();
3886
3887 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3888 ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->assoc_data->bss)) {
3889 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3890 len - baselen, false, &elems,
3891 mgmt->bssid,
3892 ifmgd->assoc_data->bss->bssid);
3893
3894 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3895
3896 if (elems.dtim_period)
3897 ifmgd->dtim_period = elems.dtim_period;
3898 ifmgd->have_beacon = true;
3899 ifmgd->assoc_data->need_beacon = false;
3900 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3901 sdata->vif.bss_conf.sync_tsf =
3902 le64_to_cpu(mgmt->u.beacon.timestamp);
3903 sdata->vif.bss_conf.sync_device_ts =
3904 rx_status->device_timestamp;
3905 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
3906 }
3907
3908 if (elems.mbssid_config_ie)
3909 bss_conf->profile_periodicity =
3910 elems.mbssid_config_ie->profile_periodicity;
3911
3912 if (elems.ext_capab_len >= 11 &&
3913 (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
3914 bss_conf->ema_ap = true;
3915
3916 /* continue assoc process */
3917 ifmgd->assoc_data->timeout = jiffies;
3918 ifmgd->assoc_data->timeout_started = true;
3919 run_again(sdata, ifmgd->assoc_data->timeout);
3920 return;
3921 }
3922
3923 if (!ifmgd->associated ||
3924 !ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->associated))
3925 return;
3926 bssid = ifmgd->associated->bssid;
3927
3928 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
3929 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf,
3930 local, rx_status);
3931
3932 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3933 mlme_dbg_ratelimited(sdata,
3934 "cancelling AP probe due to a received beacon\n");
3935 ieee80211_reset_ap_probe(sdata);
3936 }
3937
3938 /*
3939 * Push the beacon loss detection into the future since
3940 * we are processing a beacon from the AP just now.
3941 */
3942 ieee80211_sta_reset_beacon_monitor(sdata);
3943
3944 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3945 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3946 len - baselen, false, &elems,
3947 care_about_ies, ncrc,
3948 mgmt->bssid, bssid);
3949
3950 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3951 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3952 if (local->hw.conf.dynamic_ps_timeout > 0) {
3953 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3954 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3955 ieee80211_hw_config(local,
3956 IEEE80211_CONF_CHANGE_PS);
3957 }
3958 ieee80211_send_nullfunc(local, sdata, false);
3959 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3960 local->pspolling = true;
3961
3962 /*
3963 * Here is assumed that the driver will be
3964 * able to send ps-poll frame and receive a
3965 * response even though power save mode is
3966 * enabled, but some drivers might require
3967 * to disable power save here. This needs
3968 * to be investigated.
3969 */
3970 ieee80211_send_pspoll(local, sdata);
3971 }
3972 }
3973
3974 if (sdata->vif.p2p ||
3975 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3976 struct ieee80211_p2p_noa_attr noa = {};
3977 int ret;
3978
3979 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3980 len - baselen,
3981 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3982 (u8 *) &noa, sizeof(noa));
3983 if (ret >= 2) {
3984 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3985 /* valid noa_attr and index changed */
3986 sdata->u.mgd.p2p_noa_index = noa.index;
3987 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3988 changed |= BSS_CHANGED_P2P_PS;
3989 /*
3990 * make sure we update all information, the CRC
3991 * mechanism doesn't look at P2P attributes.
3992 */
3993 ifmgd->beacon_crc_valid = false;
3994 }
3995 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3996 /* noa_attr not found and we had valid noa_attr before */
3997 sdata->u.mgd.p2p_noa_index = -1;
3998 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3999 changed |= BSS_CHANGED_P2P_PS;
4000 ifmgd->beacon_crc_valid = false;
4001 }
4002 }
4003
4004 if (ifmgd->csa_waiting_bcn)
4005 ieee80211_chswitch_post_beacon(sdata);
4006
4007 /*
4008 * Update beacon timing and dtim count on every beacon appearance. This
4009 * will allow the driver to use the most updated values. Do it before
4010 * comparing this one with last received beacon.
4011 * IMPORTANT: These parameters would possibly be out of sync by the time
4012 * the driver will use them. The synchronized view is currently
4013 * guaranteed only in certain callbacks.
4014 */
4015 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4016 sdata->vif.bss_conf.sync_tsf =
4017 le64_to_cpu(mgmt->u.beacon.timestamp);
4018 sdata->vif.bss_conf.sync_device_ts =
4019 rx_status->device_timestamp;
4020 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
4021 }
4022
4023 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
4024 return;
4025 ifmgd->beacon_crc = ncrc;
4026 ifmgd->beacon_crc_valid = true;
4027
4028 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
4029
4030 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
4031 rx_status->device_timestamp,
4032 &elems, true);
4033
4034 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
4035 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
4036 elems.wmm_param_len,
4037 elems.mu_edca_param_set))
4038 changed |= BSS_CHANGED_QOS;
4039
4040 /*
4041 * If we haven't had a beacon before, tell the driver about the
4042 * DTIM period (and beacon timing if desired) now.
4043 */
4044 if (!ifmgd->have_beacon) {
4045 /* a few bogus AP send dtim_period = 0 or no TIM IE */
4046 bss_conf->dtim_period = elems.dtim_period ?: 1;
4047
4048 changed |= BSS_CHANGED_BEACON_INFO;
4049 ifmgd->have_beacon = true;
4050
4051 mutex_lock(&local->iflist_mtx);
4052 ieee80211_recalc_ps(local);
4053 mutex_unlock(&local->iflist_mtx);
4054
4055 ieee80211_recalc_ps_vif(sdata);
4056 }
4057
4058 if (elems.erp_info) {
4059 erp_valid = true;
4060 erp_value = elems.erp_info[0];
4061 } else {
4062 erp_valid = false;
4063 }
4064 changed |= ieee80211_handle_bss_capability(sdata,
4065 le16_to_cpu(mgmt->u.beacon.capab_info),
4066 erp_valid, erp_value);
4067
4068 mutex_lock(&local->sta_mtx);
4069 sta = sta_info_get(sdata, bssid);
4070
4071 changed |= ieee80211_recalc_twt_req(sdata, sta, &elems);
4072
4073 if (ieee80211_config_bw(sdata, sta,
4074 elems.ht_cap_elem, elems.ht_operation,
4075 elems.vht_operation, elems.he_operation,
4076 bssid, &changed)) {
4077 mutex_unlock(&local->sta_mtx);
4078 sdata_info(sdata,
4079 "failed to follow AP %pM bandwidth change, disconnect\n",
4080 bssid);
4081 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4082 WLAN_REASON_DEAUTH_LEAVING,
4083 true, deauth_buf);
4084 ieee80211_report_disconnect(sdata, deauth_buf,
4085 sizeof(deauth_buf), true,
4086 WLAN_REASON_DEAUTH_LEAVING);
4087 return;
4088 }
4089
4090 if (sta && elems.opmode_notif)
4091 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
4092 rx_status->band);
4093 mutex_unlock(&local->sta_mtx);
4094
4095 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
4096 elems.country_elem,
4097 elems.country_elem_len,
4098 elems.pwr_constr_elem,
4099 elems.cisco_dtpc_elem);
4100
4101 ieee80211_bss_info_change_notify(sdata, changed);
4102 }
4103
4104 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
4105 struct sk_buff *skb)
4106 {
4107 struct ieee80211_rx_status *rx_status;
4108 struct ieee80211_mgmt *mgmt;
4109 u16 fc;
4110 struct ieee802_11_elems elems;
4111 int ies_len;
4112
4113 rx_status = (struct ieee80211_rx_status *) skb->cb;
4114 mgmt = (struct ieee80211_mgmt *) skb->data;
4115 fc = le16_to_cpu(mgmt->frame_control);
4116
4117 sdata_lock(sdata);
4118
4119 switch (fc & IEEE80211_FCTL_STYPE) {
4120 case IEEE80211_STYPE_BEACON:
4121 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
4122 break;
4123 case IEEE80211_STYPE_PROBE_RESP:
4124 ieee80211_rx_mgmt_probe_resp(sdata, skb);
4125 break;
4126 case IEEE80211_STYPE_AUTH:
4127 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
4128 break;
4129 case IEEE80211_STYPE_DEAUTH:
4130 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
4131 break;
4132 case IEEE80211_STYPE_DISASSOC:
4133 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
4134 break;
4135 case IEEE80211_STYPE_ASSOC_RESP:
4136 case IEEE80211_STYPE_REASSOC_RESP:
4137 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
4138 break;
4139 case IEEE80211_STYPE_ACTION:
4140 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
4141 ies_len = skb->len -
4142 offsetof(struct ieee80211_mgmt,
4143 u.action.u.chan_switch.variable);
4144
4145 if (ies_len < 0)
4146 break;
4147
4148 /* CSA IE cannot be overridden, no need for BSSID */
4149 ieee802_11_parse_elems(
4150 mgmt->u.action.u.chan_switch.variable,
4151 ies_len, true, &elems, mgmt->bssid, NULL);
4152
4153 if (elems.parse_error)
4154 break;
4155
4156 ieee80211_sta_process_chanswitch(sdata,
4157 rx_status->mactime,
4158 rx_status->device_timestamp,
4159 &elems, false);
4160 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
4161 ies_len = skb->len -
4162 offsetof(struct ieee80211_mgmt,
4163 u.action.u.ext_chan_switch.variable);
4164
4165 if (ies_len < 0)
4166 break;
4167
4168 /*
4169 * extended CSA IE can't be overridden, no need for
4170 * BSSID
4171 */
4172 ieee802_11_parse_elems(
4173 mgmt->u.action.u.ext_chan_switch.variable,
4174 ies_len, true, &elems, mgmt->bssid, NULL);
4175
4176 if (elems.parse_error)
4177 break;
4178
4179 /* for the handling code pretend this was also an IE */
4180 elems.ext_chansw_ie =
4181 &mgmt->u.action.u.ext_chan_switch.data;
4182
4183 ieee80211_sta_process_chanswitch(sdata,
4184 rx_status->mactime,
4185 rx_status->device_timestamp,
4186 &elems, false);
4187 }
4188 break;
4189 }
4190 sdata_unlock(sdata);
4191 }
4192
4193 static void ieee80211_sta_timer(struct timer_list *t)
4194 {
4195 struct ieee80211_sub_if_data *sdata =
4196 from_timer(sdata, t, u.mgd.timer);
4197
4198 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4199 }
4200
4201 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
4202 u8 *bssid, u8 reason, bool tx)
4203 {
4204 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4205
4206 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
4207 tx, frame_buf);
4208
4209 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4210 reason);
4211 }
4212
4213 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
4214 {
4215 struct ieee80211_local *local = sdata->local;
4216 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4217 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
4218 u32 tx_flags = 0;
4219 u16 trans = 1;
4220 u16 status = 0;
4221 u16 prepare_tx_duration = 0;
4222
4223 sdata_assert_lock(sdata);
4224
4225 if (WARN_ON_ONCE(!auth_data))
4226 return -EINVAL;
4227
4228 auth_data->tries++;
4229
4230 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
4231 sdata_info(sdata, "authentication with %pM timed out\n",
4232 auth_data->bss->bssid);
4233
4234 /*
4235 * Most likely AP is not in the range so remove the
4236 * bss struct for that AP.
4237 */
4238 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
4239
4240 return -ETIMEDOUT;
4241 }
4242
4243 if (auth_data->algorithm == WLAN_AUTH_SAE)
4244 prepare_tx_duration =
4245 jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
4246
4247 drv_mgd_prepare_tx(local, sdata, prepare_tx_duration);
4248
4249 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
4250 auth_data->bss->bssid, auth_data->tries,
4251 IEEE80211_AUTH_MAX_TRIES);
4252
4253 auth_data->expected_transaction = 2;
4254
4255 if (auth_data->algorithm == WLAN_AUTH_SAE) {
4256 trans = auth_data->sae_trans;
4257 status = auth_data->sae_status;
4258 auth_data->expected_transaction = trans;
4259 }
4260
4261 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4262 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
4263 IEEE80211_TX_INTFL_MLME_CONN_TX;
4264
4265 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
4266 auth_data->data, auth_data->data_len,
4267 auth_data->bss->bssid,
4268 auth_data->bss->bssid, NULL, 0, 0,
4269 tx_flags);
4270
4271 if (tx_flags == 0) {
4272 if (auth_data->algorithm == WLAN_AUTH_SAE)
4273 auth_data->timeout = jiffies +
4274 IEEE80211_AUTH_TIMEOUT_SAE;
4275 else
4276 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
4277 } else {
4278 auth_data->timeout =
4279 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
4280 }
4281
4282 auth_data->timeout_started = true;
4283 run_again(sdata, auth_data->timeout);
4284
4285 return 0;
4286 }
4287
4288 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
4289 {
4290 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
4291 struct ieee80211_local *local = sdata->local;
4292
4293 sdata_assert_lock(sdata);
4294
4295 assoc_data->tries++;
4296 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
4297 sdata_info(sdata, "association with %pM timed out\n",
4298 assoc_data->bss->bssid);
4299
4300 /*
4301 * Most likely AP is not in the range so remove the
4302 * bss struct for that AP.
4303 */
4304 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
4305
4306 return -ETIMEDOUT;
4307 }
4308
4309 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
4310 assoc_data->bss->bssid, assoc_data->tries,
4311 IEEE80211_ASSOC_MAX_TRIES);
4312 ieee80211_send_assoc(sdata);
4313
4314 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4315 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
4316 assoc_data->timeout_started = true;
4317 run_again(sdata, assoc_data->timeout);
4318 } else {
4319 assoc_data->timeout =
4320 round_jiffies_up(jiffies +
4321 IEEE80211_ASSOC_TIMEOUT_LONG);
4322 assoc_data->timeout_started = true;
4323 run_again(sdata, assoc_data->timeout);
4324 }
4325
4326 return 0;
4327 }
4328
4329 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
4330 __le16 fc, bool acked)
4331 {
4332 struct ieee80211_local *local = sdata->local;
4333
4334 sdata->u.mgd.status_fc = fc;
4335 sdata->u.mgd.status_acked = acked;
4336 sdata->u.mgd.status_received = true;
4337
4338 ieee80211_queue_work(&local->hw, &sdata->work);
4339 }
4340
4341 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
4342 {
4343 struct ieee80211_local *local = sdata->local;
4344 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4345
4346 sdata_lock(sdata);
4347
4348 if (ifmgd->status_received) {
4349 __le16 fc = ifmgd->status_fc;
4350 bool status_acked = ifmgd->status_acked;
4351
4352 ifmgd->status_received = false;
4353 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
4354 if (status_acked) {
4355 if (ifmgd->auth_data->algorithm ==
4356 WLAN_AUTH_SAE)
4357 ifmgd->auth_data->timeout =
4358 jiffies +
4359 IEEE80211_AUTH_TIMEOUT_SAE;
4360 else
4361 ifmgd->auth_data->timeout =
4362 jiffies +
4363 IEEE80211_AUTH_TIMEOUT_SHORT;
4364 run_again(sdata, ifmgd->auth_data->timeout);
4365 } else {
4366 ifmgd->auth_data->timeout = jiffies - 1;
4367 }
4368 ifmgd->auth_data->timeout_started = true;
4369 } else if (ifmgd->assoc_data &&
4370 (ieee80211_is_assoc_req(fc) ||
4371 ieee80211_is_reassoc_req(fc))) {
4372 if (status_acked) {
4373 ifmgd->assoc_data->timeout =
4374 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
4375 run_again(sdata, ifmgd->assoc_data->timeout);
4376 } else {
4377 ifmgd->assoc_data->timeout = jiffies - 1;
4378 }
4379 ifmgd->assoc_data->timeout_started = true;
4380 }
4381 }
4382
4383 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
4384 time_after(jiffies, ifmgd->auth_data->timeout)) {
4385 if (ifmgd->auth_data->done) {
4386 /*
4387 * ok ... we waited for assoc but userspace didn't,
4388 * so let's just kill the auth data
4389 */
4390 ieee80211_destroy_auth_data(sdata, false);
4391 } else if (ieee80211_auth(sdata)) {
4392 u8 bssid[ETH_ALEN];
4393 struct ieee80211_event event = {
4394 .type = MLME_EVENT,
4395 .u.mlme.data = AUTH_EVENT,
4396 .u.mlme.status = MLME_TIMEOUT,
4397 };
4398
4399 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
4400
4401 ieee80211_destroy_auth_data(sdata, false);
4402
4403 cfg80211_auth_timeout(sdata->dev, bssid);
4404 drv_event_callback(sdata->local, sdata, &event);
4405 }
4406 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
4407 run_again(sdata, ifmgd->auth_data->timeout);
4408
4409 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
4410 time_after(jiffies, ifmgd->assoc_data->timeout)) {
4411 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
4412 ieee80211_do_assoc(sdata)) {
4413 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4414 struct ieee80211_event event = {
4415 .type = MLME_EVENT,
4416 .u.mlme.data = ASSOC_EVENT,
4417 .u.mlme.status = MLME_TIMEOUT,
4418 };
4419
4420 ieee80211_destroy_assoc_data(sdata, false, false);
4421 cfg80211_assoc_timeout(sdata->dev, bss);
4422 drv_event_callback(sdata->local, sdata, &event);
4423 }
4424 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
4425 run_again(sdata, ifmgd->assoc_data->timeout);
4426
4427 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
4428 ifmgd->associated) {
4429 u8 bssid[ETH_ALEN];
4430 int max_tries;
4431
4432 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4433
4434 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4435 max_tries = max_nullfunc_tries;
4436 else
4437 max_tries = max_probe_tries;
4438
4439 /* ACK received for nullfunc probing frame */
4440 if (!ifmgd->probe_send_count)
4441 ieee80211_reset_ap_probe(sdata);
4442 else if (ifmgd->nullfunc_failed) {
4443 if (ifmgd->probe_send_count < max_tries) {
4444 mlme_dbg(sdata,
4445 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
4446 bssid, ifmgd->probe_send_count,
4447 max_tries);
4448 ieee80211_mgd_probe_ap_send(sdata);
4449 } else {
4450 mlme_dbg(sdata,
4451 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
4452 bssid);
4453 ieee80211_sta_connection_lost(sdata, bssid,
4454 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4455 false);
4456 }
4457 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
4458 run_again(sdata, ifmgd->probe_timeout);
4459 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4460 mlme_dbg(sdata,
4461 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
4462 bssid, probe_wait_ms);
4463 ieee80211_sta_connection_lost(sdata, bssid,
4464 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4465 } else if (ifmgd->probe_send_count < max_tries) {
4466 mlme_dbg(sdata,
4467 "No probe response from AP %pM after %dms, try %d/%i\n",
4468 bssid, probe_wait_ms,
4469 ifmgd->probe_send_count, max_tries);
4470 ieee80211_mgd_probe_ap_send(sdata);
4471 } else {
4472 /*
4473 * We actually lost the connection ... or did we?
4474 * Let's make sure!
4475 */
4476 mlme_dbg(sdata,
4477 "No probe response from AP %pM after %dms, disconnecting.\n",
4478 bssid, probe_wait_ms);
4479
4480 ieee80211_sta_connection_lost(sdata, bssid,
4481 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4482 }
4483 }
4484
4485 sdata_unlock(sdata);
4486 }
4487
4488 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
4489 {
4490 struct ieee80211_sub_if_data *sdata =
4491 from_timer(sdata, t, u.mgd.bcn_mon_timer);
4492 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4493
4494 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4495 return;
4496
4497 sdata->u.mgd.connection_loss = false;
4498 ieee80211_queue_work(&sdata->local->hw,
4499 &sdata->u.mgd.beacon_connection_loss_work);
4500 }
4501
4502 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
4503 {
4504 struct ieee80211_sub_if_data *sdata =
4505 from_timer(sdata, t, u.mgd.conn_mon_timer);
4506 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4507 struct ieee80211_local *local = sdata->local;
4508
4509 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4510 return;
4511
4512 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4513 }
4514
4515 static void ieee80211_sta_monitor_work(struct work_struct *work)
4516 {
4517 struct ieee80211_sub_if_data *sdata =
4518 container_of(work, struct ieee80211_sub_if_data,
4519 u.mgd.monitor_work);
4520
4521 ieee80211_mgd_probe_ap(sdata, false);
4522 }
4523
4524 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4525 {
4526 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4527 __ieee80211_stop_poll(sdata);
4528
4529 /* let's probe the connection once */
4530 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4531 ieee80211_queue_work(&sdata->local->hw,
4532 &sdata->u.mgd.monitor_work);
4533 }
4534 }
4535
4536 #ifdef CONFIG_PM
4537 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4538 {
4539 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4540 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4541
4542 sdata_lock(sdata);
4543
4544 if (ifmgd->auth_data || ifmgd->assoc_data) {
4545 const u8 *bssid = ifmgd->auth_data ?
4546 ifmgd->auth_data->bss->bssid :
4547 ifmgd->assoc_data->bss->bssid;
4548
4549 /*
4550 * If we are trying to authenticate / associate while suspending,
4551 * cfg80211 won't know and won't actually abort those attempts,
4552 * thus we need to do that ourselves.
4553 */
4554 ieee80211_send_deauth_disassoc(sdata, bssid, bssid,
4555 IEEE80211_STYPE_DEAUTH,
4556 WLAN_REASON_DEAUTH_LEAVING,
4557 false, frame_buf);
4558 if (ifmgd->assoc_data)
4559 ieee80211_destroy_assoc_data(sdata, false, true);
4560 if (ifmgd->auth_data)
4561 ieee80211_destroy_auth_data(sdata, false);
4562 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4563 IEEE80211_DEAUTH_FRAME_LEN);
4564 }
4565
4566 /* This is a bit of a hack - we should find a better and more generic
4567 * solution to this. Normally when suspending, cfg80211 will in fact
4568 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4569 * auth (not so important) or assoc (this is the problem) process.
4570 *
4571 * As a consequence, it can happen that we are in the process of both
4572 * associating and suspending, and receive an association response
4573 * after cfg80211 has checked if it needs to disconnect, but before
4574 * we actually set the flag to drop incoming frames. This will then
4575 * cause the workqueue flush to process the association response in
4576 * the suspend, resulting in a successful association just before it
4577 * tries to remove the interface from the driver, which now though
4578 * has a channel context assigned ... this results in issues.
4579 *
4580 * To work around this (for now) simply deauth here again if we're
4581 * now connected.
4582 */
4583 if (ifmgd->associated && !sdata->local->wowlan) {
4584 u8 bssid[ETH_ALEN];
4585 struct cfg80211_deauth_request req = {
4586 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4587 .bssid = bssid,
4588 };
4589
4590 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4591 ieee80211_mgd_deauth(sdata, &req);
4592 }
4593
4594 sdata_unlock(sdata);
4595 }
4596
4597 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4598 {
4599 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4600
4601 sdata_lock(sdata);
4602 if (!ifmgd->associated) {
4603 sdata_unlock(sdata);
4604 return;
4605 }
4606
4607 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4608 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4609 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4610 ieee80211_sta_connection_lost(sdata,
4611 ifmgd->associated->bssid,
4612 WLAN_REASON_UNSPECIFIED,
4613 true);
4614 sdata_unlock(sdata);
4615 return;
4616 }
4617 sdata_unlock(sdata);
4618 }
4619 #endif
4620
4621 /* interface setup */
4622 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4623 {
4624 struct ieee80211_if_managed *ifmgd;
4625
4626 ifmgd = &sdata->u.mgd;
4627 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4628 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4629 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4630 ieee80211_beacon_connection_loss_work);
4631 INIT_WORK(&ifmgd->csa_connection_drop_work,
4632 ieee80211_csa_connection_drop_work);
4633 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4634 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4635 ieee80211_tdls_peer_del_work);
4636 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
4637 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
4638 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
4639 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
4640 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4641 ieee80211_sta_handle_tspec_ac_params_wk);
4642
4643 ifmgd->flags = 0;
4644 ifmgd->powersave = sdata->wdev.ps;
4645 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4646 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4647 ifmgd->p2p_noa_index = -1;
4648
4649 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4650 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4651 else
4652 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4653
4654 /* Setup TDLS data */
4655 spin_lock_init(&ifmgd->teardown_lock);
4656 ifmgd->teardown_skb = NULL;
4657 ifmgd->orig_teardown_skb = NULL;
4658 }
4659
4660 /* scan finished notification */
4661 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4662 {
4663 struct ieee80211_sub_if_data *sdata;
4664
4665 /* Restart STA timers */
4666 rcu_read_lock();
4667 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4668 if (ieee80211_sdata_running(sdata))
4669 ieee80211_restart_sta_timer(sdata);
4670 }
4671 rcu_read_unlock();
4672 }
4673
4674 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4675 struct cfg80211_bss *cbss)
4676 {
4677 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4678 const u8 *ht_cap_ie, *vht_cap_ie;
4679 const struct ieee80211_ht_cap *ht_cap;
4680 const struct ieee80211_vht_cap *vht_cap;
4681 u8 chains = 1;
4682
4683 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4684 return chains;
4685
4686 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4687 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4688 ht_cap = (void *)(ht_cap_ie + 2);
4689 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4690 /*
4691 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4692 * "Tx Unequal Modulation Supported" fields.
4693 */
4694 }
4695
4696 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4697 return chains;
4698
4699 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4700 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4701 u8 nss;
4702 u16 tx_mcs_map;
4703
4704 vht_cap = (void *)(vht_cap_ie + 2);
4705 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4706 for (nss = 8; nss > 0; nss--) {
4707 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4708 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4709 break;
4710 }
4711 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4712 chains = max(chains, nss);
4713 }
4714
4715 return chains;
4716 }
4717
4718 static bool
4719 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband,
4720 const struct ieee80211_he_operation *he_op)
4721 {
4722 const struct ieee80211_sta_he_cap *sta_he_cap =
4723 ieee80211_get_he_sta_cap(sband);
4724 u16 ap_min_req_set;
4725 int i;
4726
4727 if (!sta_he_cap || !he_op)
4728 return false;
4729
4730 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4731
4732 /* Need to go over for 80MHz, 160MHz and for 80+80 */
4733 for (i = 0; i < 3; i++) {
4734 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
4735 &sta_he_cap->he_mcs_nss_supp;
4736 u16 sta_mcs_map_rx =
4737 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
4738 u16 sta_mcs_map_tx =
4739 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
4740 u8 nss;
4741 bool verified = true;
4742
4743 /*
4744 * For each band there is a maximum of 8 spatial streams
4745 * possible. Each of the sta_mcs_map_* is a 16-bit struct built
4746 * of 2 bits per NSS (1-8), with the values defined in enum
4747 * ieee80211_he_mcs_support. Need to make sure STA TX and RX
4748 * capabilities aren't less than the AP's minimum requirements
4749 * for this HE BSS per SS.
4750 * It is enough to find one such band that meets the reqs.
4751 */
4752 for (nss = 8; nss > 0; nss--) {
4753 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
4754 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
4755 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4756
4757 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4758 continue;
4759
4760 /*
4761 * Make sure the HE AP doesn't require MCSs that aren't
4762 * supported by the client
4763 */
4764 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4765 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4766 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
4767 verified = false;
4768 break;
4769 }
4770 }
4771
4772 if (verified)
4773 return true;
4774 }
4775
4776 /* If here, STA doesn't meet AP's HE min requirements */
4777 return false;
4778 }
4779
4780 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4781 struct cfg80211_bss *cbss)
4782 {
4783 struct ieee80211_local *local = sdata->local;
4784 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4785 const struct ieee80211_ht_cap *ht_cap = NULL;
4786 const struct ieee80211_ht_operation *ht_oper = NULL;
4787 const struct ieee80211_vht_operation *vht_oper = NULL;
4788 const struct ieee80211_he_operation *he_oper = NULL;
4789 struct ieee80211_supported_band *sband;
4790 struct cfg80211_chan_def chandef;
4791 int ret;
4792 u32 i;
4793 bool have_80mhz;
4794
4795 sband = local->hw.wiphy->bands[cbss->channel->band];
4796
4797 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4798 IEEE80211_STA_DISABLE_80P80MHZ |
4799 IEEE80211_STA_DISABLE_160MHZ);
4800
4801 /* disable HT/VHT/HE if we don't support them */
4802 if (!sband->ht_cap.ht_supported) {
4803 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4804 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4805 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4806 }
4807
4808 if (!sband->vht_cap.vht_supported)
4809 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4810
4811 if (!ieee80211_get_he_sta_cap(sband))
4812 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4813
4814 rcu_read_lock();
4815
4816 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4817 const u8 *ht_oper_ie, *ht_cap_ie;
4818
4819 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4820 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4821 ht_oper = (void *)(ht_oper_ie + 2);
4822
4823 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4824 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4825 ht_cap = (void *)(ht_cap_ie + 2);
4826
4827 if (!ht_cap) {
4828 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4829 ht_oper = NULL;
4830 }
4831 }
4832
4833 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
4834 const u8 *vht_oper_ie, *vht_cap;
4835
4836 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4837 WLAN_EID_VHT_OPERATION);
4838 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4839 vht_oper = (void *)(vht_oper_ie + 2);
4840 if (vht_oper && !ht_oper) {
4841 vht_oper = NULL;
4842 sdata_info(sdata,
4843 "AP advertised VHT without HT, disabling HT/VHT/HE\n");
4844 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4845 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4846 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4847 }
4848
4849 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4850 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4851 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4852 vht_oper = NULL;
4853 }
4854 }
4855
4856 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) {
4857 const struct cfg80211_bss_ies *ies;
4858 const u8 *he_oper_ie;
4859
4860 ies = rcu_dereference(cbss->ies);
4861 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION,
4862 ies->data, ies->len);
4863 if (he_oper_ie &&
4864 he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3]))
4865 he_oper = (void *)(he_oper_ie + 3);
4866 else
4867 he_oper = NULL;
4868
4869 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper))
4870 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4871 }
4872
4873 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4874 have_80mhz = false;
4875 for (i = 0; i < sband->n_channels; i++) {
4876 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4877 IEEE80211_CHAN_NO_80MHZ))
4878 continue;
4879
4880 have_80mhz = true;
4881 break;
4882 }
4883
4884 if (!have_80mhz)
4885 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4886
4887 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4888 cbss->channel,
4889 ht_oper, vht_oper, he_oper,
4890 &chandef, false);
4891
4892 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4893 local->rx_chains);
4894
4895 rcu_read_unlock();
4896
4897 /* will change later if needed */
4898 sdata->smps_mode = IEEE80211_SMPS_OFF;
4899
4900 mutex_lock(&local->mtx);
4901 /*
4902 * If this fails (possibly due to channel context sharing
4903 * on incompatible channels, e.g. 80+80 and 160 sharing the
4904 * same control channel) try to use a smaller bandwidth.
4905 */
4906 ret = ieee80211_vif_use_channel(sdata, &chandef,
4907 IEEE80211_CHANCTX_SHARED);
4908
4909 /* don't downgrade for 5 and 10 MHz channels, though. */
4910 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4911 chandef.width == NL80211_CHAN_WIDTH_10)
4912 goto out;
4913
4914 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4915 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4916 ret = ieee80211_vif_use_channel(sdata, &chandef,
4917 IEEE80211_CHANCTX_SHARED);
4918 }
4919 out:
4920 mutex_unlock(&local->mtx);
4921 return ret;
4922 }
4923
4924 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies,
4925 u8 *dtim_count, u8 *dtim_period)
4926 {
4927 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len);
4928 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data,
4929 ies->len);
4930 const struct ieee80211_tim_ie *tim = NULL;
4931 const struct ieee80211_bssid_index *idx;
4932 bool valid = tim_ie && tim_ie[1] >= 2;
4933
4934 if (valid)
4935 tim = (void *)(tim_ie + 2);
4936
4937 if (dtim_count)
4938 *dtim_count = valid ? tim->dtim_count : 0;
4939
4940 if (dtim_period)
4941 *dtim_period = valid ? tim->dtim_period : 0;
4942
4943 /* Check if value is overridden by non-transmitted profile */
4944 if (!idx_ie || idx_ie[1] < 3)
4945 return valid;
4946
4947 idx = (void *)(idx_ie + 2);
4948
4949 if (dtim_count)
4950 *dtim_count = idx->dtim_count;
4951
4952 if (dtim_period)
4953 *dtim_period = idx->dtim_period;
4954
4955 return true;
4956 }
4957
4958 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4959 struct cfg80211_bss *cbss, bool assoc,
4960 bool override)
4961 {
4962 struct ieee80211_local *local = sdata->local;
4963 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4964 struct ieee80211_bss *bss = (void *)cbss->priv;
4965 struct sta_info *new_sta = NULL;
4966 struct ieee80211_supported_band *sband;
4967 bool have_sta = false;
4968 int err;
4969
4970 sband = local->hw.wiphy->bands[cbss->channel->band];
4971
4972 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4973 return -EINVAL;
4974
4975 /* If a reconfig is happening, bail out */
4976 if (local->in_reconfig)
4977 return -EBUSY;
4978
4979 if (assoc) {
4980 rcu_read_lock();
4981 have_sta = sta_info_get(sdata, cbss->bssid);
4982 rcu_read_unlock();
4983 }
4984
4985 if (!have_sta) {
4986 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4987 if (!new_sta)
4988 return -ENOMEM;
4989 }
4990
4991 /*
4992 * Set up the information for the new channel before setting the
4993 * new channel. We can't - completely race-free - change the basic
4994 * rates bitmap and the channel (sband) that it refers to, but if
4995 * we set it up before we at least avoid calling into the driver's
4996 * bss_info_changed() method with invalid information (since we do
4997 * call that from changing the channel - only for IDLE and perhaps
4998 * some others, but ...).
4999 *
5000 * So to avoid that, just set up all the new information before the
5001 * channel, but tell the driver to apply it only afterwards, since
5002 * it might need the new channel for that.
5003 */
5004 if (new_sta) {
5005 u32 rates = 0, basic_rates = 0;
5006 bool have_higher_than_11mbit;
5007 int min_rate = INT_MAX, min_rate_index = -1;
5008 const struct cfg80211_bss_ies *ies;
5009 int shift = ieee80211_vif_get_shift(&sdata->vif);
5010
5011 ieee80211_get_rates(sband, bss->supp_rates,
5012 bss->supp_rates_len,
5013 &rates, &basic_rates,
5014 &have_higher_than_11mbit,
5015 &min_rate, &min_rate_index,
5016 shift);
5017
5018 /*
5019 * This used to be a workaround for basic rates missing
5020 * in the association response frame. Now that we no
5021 * longer use the basic rates from there, it probably
5022 * doesn't happen any more, but keep the workaround so
5023 * in case some *other* APs are buggy in different ways
5024 * we can connect -- with a warning.
5025 */
5026 if (!basic_rates && min_rate_index >= 0) {
5027 sdata_info(sdata,
5028 "No basic rates, using min rate instead\n");
5029 basic_rates = BIT(min_rate_index);
5030 }
5031
5032 if (rates)
5033 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5034 else
5035 sdata_info(sdata,
5036 "No rates found, keeping mandatory only\n");
5037
5038 sdata->vif.bss_conf.basic_rates = basic_rates;
5039
5040 /* cf. IEEE 802.11 9.2.12 */
5041 if (cbss->channel->band == NL80211_BAND_2GHZ &&
5042 have_higher_than_11mbit)
5043 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
5044 else
5045 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
5046
5047 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
5048
5049 /* set timing information */
5050 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
5051 rcu_read_lock();
5052 ies = rcu_dereference(cbss->beacon_ies);
5053 if (ies) {
5054 sdata->vif.bss_conf.sync_tsf = ies->tsf;
5055 sdata->vif.bss_conf.sync_device_ts =
5056 bss->device_ts_beacon;
5057
5058 ieee80211_get_dtim(ies,
5059 &sdata->vif.bss_conf.sync_dtim_count,
5060 NULL);
5061 } else if (!ieee80211_hw_check(&sdata->local->hw,
5062 TIMING_BEACON_ONLY)) {
5063 ies = rcu_dereference(cbss->proberesp_ies);
5064 /* must be non-NULL since beacon IEs were NULL */
5065 sdata->vif.bss_conf.sync_tsf = ies->tsf;
5066 sdata->vif.bss_conf.sync_device_ts =
5067 bss->device_ts_presp;
5068 sdata->vif.bss_conf.sync_dtim_count = 0;
5069 } else {
5070 sdata->vif.bss_conf.sync_tsf = 0;
5071 sdata->vif.bss_conf.sync_device_ts = 0;
5072 sdata->vif.bss_conf.sync_dtim_count = 0;
5073 }
5074 rcu_read_unlock();
5075 }
5076
5077 if (new_sta || override) {
5078 err = ieee80211_prep_channel(sdata, cbss);
5079 if (err) {
5080 if (new_sta)
5081 sta_info_free(local, new_sta);
5082 return -EINVAL;
5083 }
5084 }
5085
5086 if (new_sta) {
5087 /*
5088 * tell driver about BSSID, basic rates and timing
5089 * this was set up above, before setting the channel
5090 */
5091 ieee80211_bss_info_change_notify(sdata,
5092 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
5093 BSS_CHANGED_BEACON_INT);
5094
5095 if (assoc)
5096 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
5097
5098 err = sta_info_insert(new_sta);
5099 new_sta = NULL;
5100 if (err) {
5101 sdata_info(sdata,
5102 "failed to insert STA entry for the AP (error %d)\n",
5103 err);
5104 return err;
5105 }
5106 } else
5107 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
5108
5109 /* Cancel scan to ensure that nothing interferes with connection */
5110 if (local->scanning)
5111 ieee80211_scan_cancel(local);
5112
5113 return 0;
5114 }
5115
5116 /* config hooks */
5117 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
5118 struct cfg80211_auth_request *req)
5119 {
5120 struct ieee80211_local *local = sdata->local;
5121 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5122 struct ieee80211_mgd_auth_data *auth_data;
5123 u16 auth_alg;
5124 int err;
5125 bool cont_auth;
5126
5127 /* prepare auth data structure */
5128
5129 switch (req->auth_type) {
5130 case NL80211_AUTHTYPE_OPEN_SYSTEM:
5131 auth_alg = WLAN_AUTH_OPEN;
5132 break;
5133 case NL80211_AUTHTYPE_SHARED_KEY:
5134 if (fips_enabled)
5135 return -EOPNOTSUPP;
5136 auth_alg = WLAN_AUTH_SHARED_KEY;
5137 break;
5138 case NL80211_AUTHTYPE_FT:
5139 auth_alg = WLAN_AUTH_FT;
5140 break;
5141 case NL80211_AUTHTYPE_NETWORK_EAP:
5142 auth_alg = WLAN_AUTH_LEAP;
5143 break;
5144 case NL80211_AUTHTYPE_SAE:
5145 auth_alg = WLAN_AUTH_SAE;
5146 break;
5147 case NL80211_AUTHTYPE_FILS_SK:
5148 auth_alg = WLAN_AUTH_FILS_SK;
5149 break;
5150 case NL80211_AUTHTYPE_FILS_SK_PFS:
5151 auth_alg = WLAN_AUTH_FILS_SK_PFS;
5152 break;
5153 case NL80211_AUTHTYPE_FILS_PK:
5154 auth_alg = WLAN_AUTH_FILS_PK;
5155 break;
5156 default:
5157 return -EOPNOTSUPP;
5158 }
5159
5160 if (ifmgd->assoc_data)
5161 return -EBUSY;
5162
5163 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
5164 req->ie_len, GFP_KERNEL);
5165 if (!auth_data)
5166 return -ENOMEM;
5167
5168 auth_data->bss = req->bss;
5169
5170 if (req->auth_data_len >= 4) {
5171 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
5172 __le16 *pos = (__le16 *) req->auth_data;
5173
5174 auth_data->sae_trans = le16_to_cpu(pos[0]);
5175 auth_data->sae_status = le16_to_cpu(pos[1]);
5176 }
5177 memcpy(auth_data->data, req->auth_data + 4,
5178 req->auth_data_len - 4);
5179 auth_data->data_len += req->auth_data_len - 4;
5180 }
5181
5182 /* Check if continuing authentication or trying to authenticate with the
5183 * same BSS that we were in the process of authenticating with and avoid
5184 * removal and re-addition of the STA entry in
5185 * ieee80211_prep_connection().
5186 */
5187 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss;
5188
5189 if (req->ie && req->ie_len) {
5190 memcpy(&auth_data->data[auth_data->data_len],
5191 req->ie, req->ie_len);
5192 auth_data->data_len += req->ie_len;
5193 }
5194
5195 if (req->key && req->key_len) {
5196 auth_data->key_len = req->key_len;
5197 auth_data->key_idx = req->key_idx;
5198 memcpy(auth_data->key, req->key, req->key_len);
5199 }
5200
5201 auth_data->algorithm = auth_alg;
5202
5203 /* try to authenticate/probe */
5204
5205 if (ifmgd->auth_data) {
5206 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
5207 auth_data->peer_confirmed =
5208 ifmgd->auth_data->peer_confirmed;
5209 }
5210 ieee80211_destroy_auth_data(sdata, cont_auth);
5211 }
5212
5213 /* prep auth_data so we don't go into idle on disassoc */
5214 ifmgd->auth_data = auth_data;
5215
5216 /* If this is continuation of an ongoing SAE authentication exchange
5217 * (i.e., request to send SAE Confirm) and the peer has already
5218 * confirmed, mark authentication completed since we are about to send
5219 * out SAE Confirm.
5220 */
5221 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
5222 auth_data->peer_confirmed && auth_data->sae_trans == 2)
5223 ieee80211_mark_sta_auth(sdata, req->bss->bssid);
5224
5225 if (ifmgd->associated) {
5226 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5227
5228 sdata_info(sdata,
5229 "disconnect from AP %pM for new auth to %pM\n",
5230 ifmgd->associated->bssid, req->bss->bssid);
5231 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5232 WLAN_REASON_UNSPECIFIED,
5233 false, frame_buf);
5234
5235 ieee80211_report_disconnect(sdata, frame_buf,
5236 sizeof(frame_buf), true,
5237 WLAN_REASON_UNSPECIFIED);
5238 }
5239
5240 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
5241
5242 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false);
5243 if (err)
5244 goto err_clear;
5245
5246 err = ieee80211_auth(sdata);
5247 if (err) {
5248 sta_info_destroy_addr(sdata, req->bss->bssid);
5249 goto err_clear;
5250 }
5251
5252 /* hold our own reference */
5253 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
5254 return 0;
5255
5256 err_clear:
5257 eth_zero_addr(ifmgd->bssid);
5258 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5259 ifmgd->auth_data = NULL;
5260 mutex_lock(&sdata->local->mtx);
5261 ieee80211_vif_release_channel(sdata);
5262 mutex_unlock(&sdata->local->mtx);
5263 kfree(auth_data);
5264 return err;
5265 }
5266
5267 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
5268 struct cfg80211_assoc_request *req)
5269 {
5270 struct ieee80211_local *local = sdata->local;
5271 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5272 struct ieee80211_bss *bss = (void *)req->bss->priv;
5273 struct ieee80211_mgd_assoc_data *assoc_data;
5274 const struct cfg80211_bss_ies *beacon_ies;
5275 struct ieee80211_supported_band *sband;
5276 const u8 *ssidie, *ht_ie, *vht_ie;
5277 int i, err;
5278 bool override = false;
5279
5280 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
5281 if (!assoc_data)
5282 return -ENOMEM;
5283
5284 rcu_read_lock();
5285 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
5286 if (!ssidie || ssidie[1] > sizeof(assoc_data->ssid)) {
5287 rcu_read_unlock();
5288 kfree(assoc_data);
5289 return -EINVAL;
5290 }
5291 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
5292 assoc_data->ssid_len = ssidie[1];
5293 rcu_read_unlock();
5294
5295 if (ifmgd->associated) {
5296 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5297
5298 sdata_info(sdata,
5299 "disconnect from AP %pM for new assoc to %pM\n",
5300 ifmgd->associated->bssid, req->bss->bssid);
5301 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5302 WLAN_REASON_UNSPECIFIED,
5303 false, frame_buf);
5304
5305 ieee80211_report_disconnect(sdata, frame_buf,
5306 sizeof(frame_buf), true,
5307 WLAN_REASON_UNSPECIFIED);
5308 }
5309
5310 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
5311 err = -EBUSY;
5312 goto err_free;
5313 }
5314
5315 if (ifmgd->assoc_data) {
5316 err = -EBUSY;
5317 goto err_free;
5318 }
5319
5320 if (ifmgd->auth_data) {
5321 bool match;
5322
5323 /* keep sta info, bssid if matching */
5324 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
5325 ieee80211_destroy_auth_data(sdata, match);
5326 }
5327
5328 /* prepare assoc data */
5329
5330 ifmgd->beacon_crc_valid = false;
5331
5332 assoc_data->wmm = bss->wmm_used &&
5333 (local->hw.queues >= IEEE80211_NUM_ACS);
5334
5335 /*
5336 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
5337 * We still associate in non-HT mode (11a/b/g) if any one of these
5338 * ciphers is configured as pairwise.
5339 * We can set this to true for non-11n hardware, that'll be checked
5340 * separately along with the peer capabilities.
5341 */
5342 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
5343 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
5344 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
5345 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5346 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5347 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5348 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5349 netdev_info(sdata->dev,
5350 "disabling HT/VHT/HE due to WEP/TKIP use\n");
5351 }
5352 }
5353
5354 sband = local->hw.wiphy->bands[req->bss->channel->band];
5355
5356 /* also disable HT/VHT/HE if the AP doesn't use WMM */
5357 if (!bss->wmm_used) {
5358 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5359 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5360 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5361 netdev_info(sdata->dev,
5362 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n");
5363 }
5364
5365 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
5366 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
5367 sizeof(ifmgd->ht_capa_mask));
5368
5369 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
5370 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
5371 sizeof(ifmgd->vht_capa_mask));
5372
5373 if (req->ie && req->ie_len) {
5374 memcpy(assoc_data->ie, req->ie, req->ie_len);
5375 assoc_data->ie_len = req->ie_len;
5376 }
5377
5378 if (req->fils_kek) {
5379 /* should already be checked in cfg80211 - so warn */
5380 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
5381 err = -EINVAL;
5382 goto err_free;
5383 }
5384 memcpy(assoc_data->fils_kek, req->fils_kek,
5385 req->fils_kek_len);
5386 assoc_data->fils_kek_len = req->fils_kek_len;
5387 }
5388
5389 if (req->fils_nonces)
5390 memcpy(assoc_data->fils_nonces, req->fils_nonces,
5391 2 * FILS_NONCE_LEN);
5392
5393 assoc_data->bss = req->bss;
5394
5395 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
5396 if (ifmgd->powersave)
5397 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
5398 else
5399 sdata->smps_mode = IEEE80211_SMPS_OFF;
5400 } else
5401 sdata->smps_mode = ifmgd->req_smps;
5402
5403 assoc_data->capability = req->bss->capability;
5404 assoc_data->supp_rates = bss->supp_rates;
5405 assoc_data->supp_rates_len = bss->supp_rates_len;
5406
5407 rcu_read_lock();
5408 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
5409 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
5410 assoc_data->ap_ht_param =
5411 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
5412 else
5413 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5414 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
5415 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
5416 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
5417 sizeof(struct ieee80211_vht_cap));
5418 else
5419 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5420 rcu_read_unlock();
5421
5422 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
5423 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
5424 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
5425 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
5426
5427 if (bss->wmm_used && bss->uapsd_supported &&
5428 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
5429 assoc_data->uapsd = true;
5430 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
5431 } else {
5432 assoc_data->uapsd = false;
5433 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
5434 }
5435
5436 if (req->prev_bssid)
5437 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
5438
5439 if (req->use_mfp) {
5440 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
5441 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
5442 } else {
5443 ifmgd->mfp = IEEE80211_MFP_DISABLED;
5444 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
5445 }
5446
5447 if (req->flags & ASSOC_REQ_USE_RRM)
5448 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
5449 else
5450 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
5451
5452 if (req->crypto.control_port)
5453 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
5454 else
5455 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
5456
5457 sdata->control_port_protocol = req->crypto.control_port_ethertype;
5458 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
5459 sdata->control_port_over_nl80211 =
5460 req->crypto.control_port_over_nl80211;
5461 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth;
5462 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
5463 sdata->vif.type);
5464
5465 /* kick off associate process */
5466
5467 ifmgd->assoc_data = assoc_data;
5468 ifmgd->dtim_period = 0;
5469 ifmgd->have_beacon = false;
5470
5471 /* override HT/VHT configuration only if the AP and we support it */
5472 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
5473 struct ieee80211_sta_ht_cap sta_ht_cap;
5474
5475 if (req->flags & ASSOC_REQ_DISABLE_HT)
5476 override = true;
5477
5478 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
5479 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
5480
5481 /* check for 40 MHz disable override */
5482 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
5483 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
5484 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
5485 override = true;
5486
5487 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
5488 req->flags & ASSOC_REQ_DISABLE_VHT)
5489 override = true;
5490 }
5491
5492 if (req->flags & ASSOC_REQ_DISABLE_HT) {
5493 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5494 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5495 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5496 }
5497
5498 if (req->flags & ASSOC_REQ_DISABLE_VHT)
5499 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5500
5501 err = ieee80211_prep_connection(sdata, req->bss, true, override);
5502 if (err)
5503 goto err_clear;
5504
5505 rcu_read_lock();
5506 beacon_ies = rcu_dereference(req->bss->beacon_ies);
5507
5508 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
5509 !beacon_ies) {
5510 /*
5511 * Wait up to one beacon interval ...
5512 * should this be more if we miss one?
5513 */
5514 sdata_info(sdata, "waiting for beacon from %pM\n",
5515 ifmgd->bssid);
5516 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
5517 assoc_data->timeout_started = true;
5518 assoc_data->need_beacon = true;
5519 } else if (beacon_ies) {
5520 const u8 *ie;
5521 u8 dtim_count = 0;
5522
5523 ieee80211_get_dtim(beacon_ies, &dtim_count,
5524 &ifmgd->dtim_period);
5525
5526 ifmgd->have_beacon = true;
5527 assoc_data->timeout = jiffies;
5528 assoc_data->timeout_started = true;
5529
5530 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5531 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
5532 sdata->vif.bss_conf.sync_device_ts =
5533 bss->device_ts_beacon;
5534 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
5535 }
5536
5537 ie = cfg80211_find_ext_ie(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
5538 beacon_ies->data, beacon_ies->len);
5539 if (ie && ie[1] >= 3)
5540 sdata->vif.bss_conf.profile_periodicity = ie[4];
5541
5542 ie = cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY,
5543 beacon_ies->data, beacon_ies->len);
5544 if (ie && ie[1] >= 11 &&
5545 (ie[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
5546 sdata->vif.bss_conf.ema_ap = true;
5547 } else {
5548 assoc_data->timeout = jiffies;
5549 assoc_data->timeout_started = true;
5550 }
5551 rcu_read_unlock();
5552
5553 run_again(sdata, assoc_data->timeout);
5554
5555 if (bss->corrupt_data) {
5556 char *corrupt_type = "data";
5557 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
5558 if (bss->corrupt_data &
5559 IEEE80211_BSS_CORRUPT_PROBE_RESP)
5560 corrupt_type = "beacon and probe response";
5561 else
5562 corrupt_type = "beacon";
5563 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
5564 corrupt_type = "probe response";
5565 sdata_info(sdata, "associating with AP with corrupt %s\n",
5566 corrupt_type);
5567 }
5568
5569 return 0;
5570 err_clear:
5571 eth_zero_addr(ifmgd->bssid);
5572 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5573 ifmgd->assoc_data = NULL;
5574 err_free:
5575 kfree(assoc_data);
5576 return err;
5577 }
5578
5579 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
5580 struct cfg80211_deauth_request *req)
5581 {
5582 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5583 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5584 bool tx = !req->local_state_change;
5585
5586 if (ifmgd->auth_data &&
5587 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
5588 sdata_info(sdata,
5589 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
5590 req->bssid, req->reason_code,
5591 ieee80211_get_reason_code_string(req->reason_code));
5592
5593 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5594 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
5595 IEEE80211_STYPE_DEAUTH,
5596 req->reason_code, tx,
5597 frame_buf);
5598 ieee80211_destroy_auth_data(sdata, false);
5599 ieee80211_report_disconnect(sdata, frame_buf,
5600 sizeof(frame_buf), true,
5601 req->reason_code);
5602
5603 return 0;
5604 }
5605
5606 if (ifmgd->assoc_data &&
5607 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
5608 sdata_info(sdata,
5609 "aborting association with %pM by local choice (Reason: %u=%s)\n",
5610 req->bssid, req->reason_code,
5611 ieee80211_get_reason_code_string(req->reason_code));
5612
5613 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5614 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
5615 IEEE80211_STYPE_DEAUTH,
5616 req->reason_code, tx,
5617 frame_buf);
5618 ieee80211_destroy_assoc_data(sdata, false, true);
5619 ieee80211_report_disconnect(sdata, frame_buf,
5620 sizeof(frame_buf), true,
5621 req->reason_code);
5622 return 0;
5623 }
5624
5625 if (ifmgd->associated &&
5626 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5627 sdata_info(sdata,
5628 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5629 req->bssid, req->reason_code,
5630 ieee80211_get_reason_code_string(req->reason_code));
5631
5632 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5633 req->reason_code, tx, frame_buf);
5634 ieee80211_report_disconnect(sdata, frame_buf,
5635 sizeof(frame_buf), true,
5636 req->reason_code);
5637 return 0;
5638 }
5639
5640 return -ENOTCONN;
5641 }
5642
5643 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5644 struct cfg80211_disassoc_request *req)
5645 {
5646 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5647 u8 bssid[ETH_ALEN];
5648 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5649
5650 /*
5651 * cfg80211 should catch this ... but it's racy since
5652 * we can receive a disassoc frame, process it, hand it
5653 * to cfg80211 while that's in a locked section already
5654 * trying to tell us that the user wants to disconnect.
5655 */
5656 if (ifmgd->associated != req->bss)
5657 return -ENOLINK;
5658
5659 sdata_info(sdata,
5660 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5661 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5662
5663 memcpy(bssid, req->bss->bssid, ETH_ALEN);
5664 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5665 req->reason_code, !req->local_state_change,
5666 frame_buf);
5667
5668 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5669 req->reason_code);
5670
5671 return 0;
5672 }
5673
5674 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5675 {
5676 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5677
5678 /*
5679 * Make sure some work items will not run after this,
5680 * they will not do anything but might not have been
5681 * cancelled when disconnecting.
5682 */
5683 cancel_work_sync(&ifmgd->monitor_work);
5684 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5685 cancel_work_sync(&ifmgd->request_smps_work);
5686 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5687 cancel_work_sync(&ifmgd->chswitch_work);
5688 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5689
5690 sdata_lock(sdata);
5691 if (ifmgd->assoc_data) {
5692 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5693 ieee80211_destroy_assoc_data(sdata, false, false);
5694 cfg80211_assoc_timeout(sdata->dev, bss);
5695 }
5696 if (ifmgd->auth_data)
5697 ieee80211_destroy_auth_data(sdata, false);
5698 spin_lock_bh(&ifmgd->teardown_lock);
5699 if (ifmgd->teardown_skb) {
5700 kfree_skb(ifmgd->teardown_skb);
5701 ifmgd->teardown_skb = NULL;
5702 ifmgd->orig_teardown_skb = NULL;
5703 }
5704 kfree(ifmgd->assoc_req_ies);
5705 ifmgd->assoc_req_ies = NULL;
5706 ifmgd->assoc_req_ies_len = 0;
5707 spin_unlock_bh(&ifmgd->teardown_lock);
5708 del_timer_sync(&ifmgd->timer);
5709 sdata_unlock(sdata);
5710 }
5711
5712 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5713 enum nl80211_cqm_rssi_threshold_event rssi_event,
5714 s32 rssi_level,
5715 gfp_t gfp)
5716 {
5717 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5718
5719 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5720
5721 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5722 }
5723 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5724
5725 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5726 {
5727 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5728
5729 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5730
5731 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5732 }
5733 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
Linux with added FPC-III support