Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[linux-2.6-microblaze.git] / net / mac80211 / mlme.c
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                              u32 vht_cap_info,
149                              const struct ieee80211_ht_operation *ht_oper,
150                              const struct ieee80211_vht_operation *vht_oper,
151                              const struct ieee80211_he_operation *he_oper,
152                              struct cfg80211_chan_def *chandef, bool tracking)
153 {
154         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
155         struct cfg80211_chan_def vht_chandef;
156         struct ieee80211_sta_ht_cap sta_ht_cap;
157         u32 ht_cfreq, ret;
158
159         memset(chandef, 0, sizeof(struct cfg80211_chan_def));
160         chandef->chan = channel;
161         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
162         chandef->center_freq1 = channel->center_freq;
163         chandef->freq1_offset = channel->freq_offset;
164
165         if (channel->band == NL80211_BAND_6GHZ) {
166                 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, chandef))
167                         ret = IEEE80211_STA_DISABLE_HT |
168                               IEEE80211_STA_DISABLE_VHT |
169                               IEEE80211_STA_DISABLE_HE;
170                 vht_chandef = *chandef;
171                 goto out;
172         }
173
174         memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
175         ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
176
177         if (!ht_oper || !sta_ht_cap.ht_supported) {
178                 ret = IEEE80211_STA_DISABLE_HT |
179                       IEEE80211_STA_DISABLE_VHT |
180                       IEEE80211_STA_DISABLE_HE;
181                 goto out;
182         }
183
184         chandef->width = NL80211_CHAN_WIDTH_20;
185
186         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
187                                                   channel->band);
188         /* check that channel matches the right operating channel */
189         if (!tracking && channel->center_freq != ht_cfreq) {
190                 /*
191                  * It's possible that some APs are confused here;
192                  * Netgear WNDR3700 sometimes reports 4 higher than
193                  * the actual channel in association responses, but
194                  * since we look at probe response/beacon data here
195                  * it should be OK.
196                  */
197                 sdata_info(sdata,
198                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
199                            channel->center_freq, ht_cfreq,
200                            ht_oper->primary_chan, channel->band);
201                 ret = IEEE80211_STA_DISABLE_HT |
202                       IEEE80211_STA_DISABLE_VHT |
203                       IEEE80211_STA_DISABLE_HE;
204                 goto out;
205         }
206
207         /* check 40 MHz support, if we have it */
208         if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
209                 ieee80211_chandef_ht_oper(ht_oper, chandef);
210         } else {
211                 /* 40 MHz (and 80 MHz) must be supported for VHT */
212                 ret = IEEE80211_STA_DISABLE_VHT;
213                 /* also mark 40 MHz disabled */
214                 ret |= IEEE80211_STA_DISABLE_40MHZ;
215                 goto out;
216         }
217
218         if (!vht_oper || !sband->vht_cap.vht_supported) {
219                 ret = IEEE80211_STA_DISABLE_VHT;
220                 goto out;
221         }
222
223         vht_chandef = *chandef;
224         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper &&
225             (le32_to_cpu(he_oper->he_oper_params) &
226              IEEE80211_HE_OPERATION_VHT_OPER_INFO)) {
227                 struct ieee80211_vht_operation he_oper_vht_cap;
228
229                 /*
230                  * Set only first 3 bytes (other 2 aren't used in
231                  * ieee80211_chandef_vht_oper() anyway)
232                  */
233                 memcpy(&he_oper_vht_cap, he_oper->optional, 3);
234                 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0);
235
236                 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info,
237                                                 &he_oper_vht_cap, ht_oper,
238                                                 &vht_chandef)) {
239                         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
240                                 sdata_info(sdata,
241                                            "HE AP VHT information is invalid, disable HE\n");
242                         ret = IEEE80211_STA_DISABLE_HE;
243                         goto out;
244                 }
245         } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw,
246                                                vht_cap_info,
247                                                vht_oper, ht_oper,
248                                                &vht_chandef)) {
249                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
250                         sdata_info(sdata,
251                                    "AP VHT information is invalid, disable VHT\n");
252                 ret = IEEE80211_STA_DISABLE_VHT;
253                 goto out;
254         }
255
256         if (!cfg80211_chandef_valid(&vht_chandef)) {
257                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
258                         sdata_info(sdata,
259                                    "AP VHT information is invalid, disable VHT\n");
260                 ret = IEEE80211_STA_DISABLE_VHT;
261                 goto out;
262         }
263
264         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
265                 ret = 0;
266                 goto out;
267         }
268
269         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
270                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
271                         sdata_info(sdata,
272                                    "AP VHT information doesn't match HT, disable VHT\n");
273                 ret = IEEE80211_STA_DISABLE_VHT;
274                 goto out;
275         }
276
277         *chandef = vht_chandef;
278
279         ret = 0;
280
281 out:
282         /*
283          * When tracking the current AP, don't do any further checks if the
284          * new chandef is identical to the one we're currently using for the
285          * connection. This keeps us from playing ping-pong with regulatory,
286          * without it the following can happen (for example):
287          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
288          *  - AP advertises regdom US
289          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
290          *  - the code below detects an unsupported channel, downgrades, and
291          *    we disconnect from the AP in the caller
292          *  - disconnect causes CRDA to reload world regdomain and the game
293          *    starts anew.
294          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
295          *
296          * It seems possible that there are still scenarios with CSA or real
297          * bandwidth changes where a this could happen, but those cases are
298          * less common and wouldn't completely prevent using the AP.
299          */
300         if (tracking &&
301             cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
302                 return ret;
303
304         /* don't print the message below for VHT mismatch if VHT is disabled */
305         if (ret & IEEE80211_STA_DISABLE_VHT)
306                 vht_chandef = *chandef;
307
308         /*
309          * Ignore the DISABLED flag when we're already connected and only
310          * tracking the APs beacon for bandwidth changes - otherwise we
311          * might get disconnected here if we connect to an AP, update our
312          * regulatory information based on the AP's country IE and the
313          * information we have is wrong/outdated and disables the channel
314          * that we're actually using for the connection to the AP.
315          */
316         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
317                                         tracking ? 0 :
318                                                    IEEE80211_CHAN_DISABLED)) {
319                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
320                         ret = IEEE80211_STA_DISABLE_HT |
321                               IEEE80211_STA_DISABLE_VHT |
322                               IEEE80211_STA_DISABLE_HE;
323                         break;
324                 }
325
326                 ret |= ieee80211_chandef_downgrade(chandef);
327         }
328
329         if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef,
330                                                  IEEE80211_CHAN_NO_HE))
331                 ret |= IEEE80211_STA_DISABLE_HE;
332
333         if (chandef->width != vht_chandef.width && !tracking)
334                 sdata_info(sdata,
335                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
336
337         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
338         return ret;
339 }
340
341 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
342                                struct sta_info *sta,
343                                const struct ieee80211_ht_cap *ht_cap,
344                                const struct ieee80211_vht_cap *vht_cap,
345                                const struct ieee80211_ht_operation *ht_oper,
346                                const struct ieee80211_vht_operation *vht_oper,
347                                const struct ieee80211_he_operation *he_oper,
348                                const u8 *bssid, u32 *changed)
349 {
350         struct ieee80211_local *local = sdata->local;
351         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
352         struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan;
353         struct ieee80211_supported_band *sband =
354                 local->hw.wiphy->bands[chan->band];
355         struct cfg80211_chan_def chandef;
356         u16 ht_opmode;
357         u32 flags;
358         enum ieee80211_sta_rx_bandwidth new_sta_bw;
359         u32 vht_cap_info = 0;
360         int ret;
361
362         /* if HT was/is disabled, don't track any bandwidth changes */
363         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
364                 return 0;
365
366         /* don't check VHT if we associated as non-VHT station */
367         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
368                 vht_oper = NULL;
369
370         /* don't check HE if we associated as non-HE station */
371         if (ifmgd->flags & IEEE80211_STA_DISABLE_HE ||
372             !ieee80211_get_he_sta_cap(sband))
373                 he_oper = NULL;
374
375         if (WARN_ON_ONCE(!sta))
376                 return -EINVAL;
377
378         /*
379          * if bss configuration changed store the new one -
380          * this may be applicable even if channel is identical
381          */
382         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
383         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
384                 *changed |= BSS_CHANGED_HT;
385                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
386         }
387
388         if (vht_cap)
389                 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info);
390
391         /* calculate new channel (type) based on HT/VHT/HE operation IEs */
392         flags = ieee80211_determine_chantype(sdata, sband, chan, vht_cap_info,
393                                              ht_oper, vht_oper, he_oper,
394                                              &chandef, true);
395
396         /*
397          * Downgrade the new channel if we associated with restricted
398          * capabilities. For example, if we associated as a 20 MHz STA
399          * to a 40 MHz AP (due to regulatory, capabilities or config
400          * reasons) then switching to a 40 MHz channel now won't do us
401          * any good -- we couldn't use it with the AP.
402          */
403         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
404             chandef.width == NL80211_CHAN_WIDTH_80P80)
405                 flags |= ieee80211_chandef_downgrade(&chandef);
406         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
407             chandef.width == NL80211_CHAN_WIDTH_160)
408                 flags |= ieee80211_chandef_downgrade(&chandef);
409         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
410             chandef.width > NL80211_CHAN_WIDTH_20)
411                 flags |= ieee80211_chandef_downgrade(&chandef);
412
413         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
414                 return 0;
415
416         sdata_info(sdata,
417                    "AP %pM changed bandwidth, new config is %d.%03d MHz, "
418                    "width %d (%d.%03d/%d MHz)\n",
419                    ifmgd->bssid, chandef.chan->center_freq,
420                    chandef.chan->freq_offset, chandef.width,
421                    chandef.center_freq1, chandef.freq1_offset,
422                    chandef.center_freq2);
423
424         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
425                                       IEEE80211_STA_DISABLE_VHT |
426                                       IEEE80211_STA_DISABLE_HE |
427                                       IEEE80211_STA_DISABLE_40MHZ |
428                                       IEEE80211_STA_DISABLE_80P80MHZ |
429                                       IEEE80211_STA_DISABLE_160MHZ)) ||
430             !cfg80211_chandef_valid(&chandef)) {
431                 sdata_info(sdata,
432                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
433                            ifmgd->bssid);
434                 return -EINVAL;
435         }
436
437         switch (chandef.width) {
438         case NL80211_CHAN_WIDTH_20_NOHT:
439         case NL80211_CHAN_WIDTH_20:
440                 new_sta_bw = IEEE80211_STA_RX_BW_20;
441                 break;
442         case NL80211_CHAN_WIDTH_40:
443                 new_sta_bw = IEEE80211_STA_RX_BW_40;
444                 break;
445         case NL80211_CHAN_WIDTH_80:
446                 new_sta_bw = IEEE80211_STA_RX_BW_80;
447                 break;
448         case NL80211_CHAN_WIDTH_80P80:
449         case NL80211_CHAN_WIDTH_160:
450                 new_sta_bw = IEEE80211_STA_RX_BW_160;
451                 break;
452         default:
453                 return -EINVAL;
454         }
455
456         if (new_sta_bw > sta->cur_max_bandwidth)
457                 new_sta_bw = sta->cur_max_bandwidth;
458
459         if (new_sta_bw < sta->sta.bandwidth) {
460                 sta->sta.bandwidth = new_sta_bw;
461                 rate_control_rate_update(local, sband, sta,
462                                          IEEE80211_RC_BW_CHANGED);
463         }
464
465         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
466         if (ret) {
467                 sdata_info(sdata,
468                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
469                            ifmgd->bssid);
470                 return ret;
471         }
472
473         if (new_sta_bw > sta->sta.bandwidth) {
474                 sta->sta.bandwidth = new_sta_bw;
475                 rate_control_rate_update(local, sband, sta,
476                                          IEEE80211_RC_BW_CHANGED);
477         }
478
479         return 0;
480 }
481
482 /* frame sending functions */
483
484 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
485                                 struct sk_buff *skb, u8 ap_ht_param,
486                                 struct ieee80211_supported_band *sband,
487                                 struct ieee80211_channel *channel,
488                                 enum ieee80211_smps_mode smps)
489 {
490         u8 *pos;
491         u32 flags = channel->flags;
492         u16 cap;
493         struct ieee80211_sta_ht_cap ht_cap;
494
495         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
496
497         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
498         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
499
500         /* determine capability flags */
501         cap = ht_cap.cap;
502
503         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
504         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
505                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
506                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
507                         cap &= ~IEEE80211_HT_CAP_SGI_40;
508                 }
509                 break;
510         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
511                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
512                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
513                         cap &= ~IEEE80211_HT_CAP_SGI_40;
514                 }
515                 break;
516         }
517
518         /*
519          * If 40 MHz was disabled associate as though we weren't
520          * capable of 40 MHz -- some broken APs will never fall
521          * back to trying to transmit in 20 MHz.
522          */
523         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
524                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
525                 cap &= ~IEEE80211_HT_CAP_SGI_40;
526         }
527
528         /* set SM PS mode properly */
529         cap &= ~IEEE80211_HT_CAP_SM_PS;
530         switch (smps) {
531         case IEEE80211_SMPS_AUTOMATIC:
532         case IEEE80211_SMPS_NUM_MODES:
533                 WARN_ON(1);
534                 /* fall through */
535         case IEEE80211_SMPS_OFF:
536                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
537                         IEEE80211_HT_CAP_SM_PS_SHIFT;
538                 break;
539         case IEEE80211_SMPS_STATIC:
540                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
541                         IEEE80211_HT_CAP_SM_PS_SHIFT;
542                 break;
543         case IEEE80211_SMPS_DYNAMIC:
544                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
545                         IEEE80211_HT_CAP_SM_PS_SHIFT;
546                 break;
547         }
548
549         /* reserve and fill IE */
550         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
551         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
552 }
553
554 /* This function determines vht capability flags for the association
555  * and builds the IE.
556  * Note - the function may set the owner of the MU-MIMO capability
557  */
558 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
559                                  struct sk_buff *skb,
560                                  struct ieee80211_supported_band *sband,
561                                  struct ieee80211_vht_cap *ap_vht_cap)
562 {
563         struct ieee80211_local *local = sdata->local;
564         u8 *pos;
565         u32 cap;
566         struct ieee80211_sta_vht_cap vht_cap;
567         u32 mask, ap_bf_sts, our_bf_sts;
568
569         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
570
571         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
572         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
573
574         /* determine capability flags */
575         cap = vht_cap.cap;
576
577         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
578                 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
579
580                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
581                 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
582                     bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
583                         cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
584         }
585
586         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
587                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
588                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
589         }
590
591         /*
592          * Some APs apparently get confused if our capabilities are better
593          * than theirs, so restrict what we advertise in the assoc request.
594          */
595         if (!(ap_vht_cap->vht_cap_info &
596                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
597                 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
598                          IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
599         else if (!(ap_vht_cap->vht_cap_info &
600                         cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
601                 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
602
603         /*
604          * If some other vif is using the MU-MIMO capablity we cannot associate
605          * using MU-MIMO - this will lead to contradictions in the group-id
606          * mechanism.
607          * Ownership is defined since association request, in order to avoid
608          * simultaneous associations with MU-MIMO.
609          */
610         if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
611                 bool disable_mu_mimo = false;
612                 struct ieee80211_sub_if_data *other;
613
614                 list_for_each_entry_rcu(other, &local->interfaces, list) {
615                         if (other->vif.mu_mimo_owner) {
616                                 disable_mu_mimo = true;
617                                 break;
618                         }
619                 }
620                 if (disable_mu_mimo)
621                         cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
622                 else
623                         sdata->vif.mu_mimo_owner = true;
624         }
625
626         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
627
628         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
629         our_bf_sts = cap & mask;
630
631         if (ap_bf_sts < our_bf_sts) {
632                 cap &= ~mask;
633                 cap |= ap_bf_sts;
634         }
635
636         /* reserve and fill IE */
637         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
638         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
639 }
640
641 /* This function determines HE capability flags for the association
642  * and builds the IE.
643  */
644 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
645                                 struct sk_buff *skb,
646                                 struct ieee80211_supported_band *sband)
647 {
648         u8 *pos;
649         const struct ieee80211_sta_he_cap *he_cap = NULL;
650         struct ieee80211_chanctx_conf *chanctx_conf;
651         u8 he_cap_size;
652         bool reg_cap = false;
653
654         rcu_read_lock();
655         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
656         if (!WARN_ON_ONCE(!chanctx_conf))
657                 reg_cap = cfg80211_chandef_usable(sdata->wdev.wiphy,
658                                                   &chanctx_conf->def,
659                                                   IEEE80211_CHAN_NO_HE);
660
661         rcu_read_unlock();
662
663         he_cap = ieee80211_get_he_sta_cap(sband);
664         if (!he_cap || !reg_cap)
665                 return;
666
667         /*
668          * TODO: the 1 added is because this temporarily is under the EXTENSION
669          * IE. Get rid of it when it moves.
670          */
671         he_cap_size =
672                 2 + 1 + sizeof(he_cap->he_cap_elem) +
673                 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) +
674                 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
675                                       he_cap->he_cap_elem.phy_cap_info);
676         pos = skb_put(skb, he_cap_size);
677         ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size);
678
679         ieee80211_ie_build_he_6ghz_cap(sdata, skb);
680 }
681
682 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
683 {
684         struct ieee80211_local *local = sdata->local;
685         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
686         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
687         struct sk_buff *skb;
688         struct ieee80211_mgmt *mgmt;
689         u8 *pos, qos_info, *ie_start;
690         size_t offset = 0, noffset;
691         int i, count, rates_len, supp_rates_len, shift;
692         u16 capab;
693         struct ieee80211_supported_band *sband;
694         struct ieee80211_chanctx_conf *chanctx_conf;
695         struct ieee80211_channel *chan;
696         u32 rates = 0;
697         struct element *ext_capa = NULL;
698
699         /* we know it's writable, cast away the const */
700         if (assoc_data->ie_len)
701                 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
702                                                       assoc_data->ie,
703                                                       assoc_data->ie_len);
704
705         sdata_assert_lock(sdata);
706
707         rcu_read_lock();
708         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
709         if (WARN_ON(!chanctx_conf)) {
710                 rcu_read_unlock();
711                 return;
712         }
713         chan = chanctx_conf->def.chan;
714         rcu_read_unlock();
715         sband = local->hw.wiphy->bands[chan->band];
716         shift = ieee80211_vif_get_shift(&sdata->vif);
717
718         if (assoc_data->supp_rates_len) {
719                 /*
720                  * Get all rates supported by the device and the AP as
721                  * some APs don't like getting a superset of their rates
722                  * in the association request (e.g. D-Link DAP 1353 in
723                  * b-only mode)...
724                  */
725                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
726                                                      assoc_data->supp_rates,
727                                                      assoc_data->supp_rates_len,
728                                                      &rates);
729         } else {
730                 /*
731                  * In case AP not provide any supported rates information
732                  * before association, we send information element(s) with
733                  * all rates that we support.
734                  */
735                 rates_len = 0;
736                 for (i = 0; i < sband->n_bitrates; i++) {
737                         rates |= BIT(i);
738                         rates_len++;
739                 }
740         }
741
742         skb = alloc_skb(local->hw.extra_tx_headroom +
743                         sizeof(*mgmt) + /* bit too much but doesn't matter */
744                         2 + assoc_data->ssid_len + /* SSID */
745                         4 + rates_len + /* (extended) rates */
746                         4 + /* power capability */
747                         2 + 2 * sband->n_channels + /* supported channels */
748                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
749                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
750                         2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */
751                                 sizeof(struct ieee80211_he_mcs_nss_supp) +
752                                 IEEE80211_HE_PPE_THRES_MAX_LEN +
753                         2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) +
754                         assoc_data->ie_len + /* extra IEs */
755                         (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
756                         9, /* WMM */
757                         GFP_KERNEL);
758         if (!skb)
759                 return;
760
761         skb_reserve(skb, local->hw.extra_tx_headroom);
762
763         capab = WLAN_CAPABILITY_ESS;
764
765         if (sband->band == NL80211_BAND_2GHZ) {
766                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
767                 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
768         }
769
770         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
771                 capab |= WLAN_CAPABILITY_PRIVACY;
772
773         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
774             ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
775                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
776
777         if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
778                 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
779
780         mgmt = skb_put_zero(skb, 24);
781         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
782         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
783         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
784
785         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
786                 skb_put(skb, 10);
787                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
788                                                   IEEE80211_STYPE_REASSOC_REQ);
789                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
790                 mgmt->u.reassoc_req.listen_interval =
791                                 cpu_to_le16(local->hw.conf.listen_interval);
792                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
793                        ETH_ALEN);
794         } else {
795                 skb_put(skb, 4);
796                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
797                                                   IEEE80211_STYPE_ASSOC_REQ);
798                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
799                 mgmt->u.assoc_req.listen_interval =
800                                 cpu_to_le16(local->hw.conf.listen_interval);
801         }
802
803         /* SSID */
804         pos = skb_put(skb, 2 + assoc_data->ssid_len);
805         ie_start = pos;
806         *pos++ = WLAN_EID_SSID;
807         *pos++ = assoc_data->ssid_len;
808         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
809
810         /* add all rates which were marked to be used above */
811         supp_rates_len = rates_len;
812         if (supp_rates_len > 8)
813                 supp_rates_len = 8;
814
815         pos = skb_put(skb, supp_rates_len + 2);
816         *pos++ = WLAN_EID_SUPP_RATES;
817         *pos++ = supp_rates_len;
818
819         count = 0;
820         for (i = 0; i < sband->n_bitrates; i++) {
821                 if (BIT(i) & rates) {
822                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
823                                                 5 * (1 << shift));
824                         *pos++ = (u8) rate;
825                         if (++count == 8)
826                                 break;
827                 }
828         }
829
830         if (rates_len > count) {
831                 pos = skb_put(skb, rates_len - count + 2);
832                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
833                 *pos++ = rates_len - count;
834
835                 for (i++; i < sband->n_bitrates; i++) {
836                         if (BIT(i) & rates) {
837                                 int rate;
838                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
839                                                     5 * (1 << shift));
840                                 *pos++ = (u8) rate;
841                         }
842                 }
843         }
844
845         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
846             capab & WLAN_CAPABILITY_RADIO_MEASURE) {
847                 pos = skb_put(skb, 4);
848                 *pos++ = WLAN_EID_PWR_CAPABILITY;
849                 *pos++ = 2;
850                 *pos++ = 0; /* min tx power */
851                  /* max tx power */
852                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
853         }
854
855         /*
856          * Per spec, we shouldn't include the list of channels if we advertise
857          * support for extended channel switching, but we've always done that;
858          * (for now?) apply this restriction only on the (new) 6 GHz band.
859          */
860         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT &&
861             (sband->band != NL80211_BAND_6GHZ ||
862              !ext_capa || ext_capa->datalen < 1 ||
863              !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) {
864                 /* TODO: get this in reg domain format */
865                 pos = skb_put(skb, 2 * sband->n_channels + 2);
866                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
867                 *pos++ = 2 * sband->n_channels;
868                 for (i = 0; i < sband->n_channels; i++) {
869                         *pos++ = ieee80211_frequency_to_channel(
870                                         sband->channels[i].center_freq);
871                         *pos++ = 1; /* one channel in the subband*/
872                 }
873         }
874
875         /* Set MBSSID support for HE AP if needed */
876         if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) &&
877             !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len &&
878             ext_capa && ext_capa->datalen >= 3)
879                 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
880
881         /* if present, add any custom IEs that go before HT */
882         if (assoc_data->ie_len) {
883                 static const u8 before_ht[] = {
884                         WLAN_EID_SSID,
885                         WLAN_EID_SUPP_RATES,
886                         WLAN_EID_EXT_SUPP_RATES,
887                         WLAN_EID_PWR_CAPABILITY,
888                         WLAN_EID_SUPPORTED_CHANNELS,
889                         WLAN_EID_RSN,
890                         WLAN_EID_QOS_CAPA,
891                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
892                         WLAN_EID_MOBILITY_DOMAIN,
893                         WLAN_EID_FAST_BSS_TRANSITION,   /* reassoc only */
894                         WLAN_EID_RIC_DATA,              /* reassoc only */
895                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
896                 };
897                 static const u8 after_ric[] = {
898                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
899                         WLAN_EID_HT_CAPABILITY,
900                         WLAN_EID_BSS_COEX_2040,
901                         /* luckily this is almost always there */
902                         WLAN_EID_EXT_CAPABILITY,
903                         WLAN_EID_QOS_TRAFFIC_CAPA,
904                         WLAN_EID_TIM_BCAST_REQ,
905                         WLAN_EID_INTERWORKING,
906                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
907                         WLAN_EID_VHT_CAPABILITY,
908                         WLAN_EID_OPMODE_NOTIF,
909                 };
910
911                 noffset = ieee80211_ie_split_ric(assoc_data->ie,
912                                                  assoc_data->ie_len,
913                                                  before_ht,
914                                                  ARRAY_SIZE(before_ht),
915                                                  after_ric,
916                                                  ARRAY_SIZE(after_ric),
917                                                  offset);
918                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
919                 offset = noffset;
920         }
921
922         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
923                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
924                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
925
926         if (sband->band != NL80211_BAND_6GHZ &&
927             !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
928                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
929                                     sband, chan, sdata->smps_mode);
930
931         /* if present, add any custom IEs that go before VHT */
932         if (assoc_data->ie_len) {
933                 static const u8 before_vht[] = {
934                         /*
935                          * no need to list the ones split off before HT
936                          * or generated here
937                          */
938                         WLAN_EID_BSS_COEX_2040,
939                         WLAN_EID_EXT_CAPABILITY,
940                         WLAN_EID_QOS_TRAFFIC_CAPA,
941                         WLAN_EID_TIM_BCAST_REQ,
942                         WLAN_EID_INTERWORKING,
943                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
944                 };
945
946                 /* RIC already taken above, so no need to handle here anymore */
947                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
948                                              before_vht, ARRAY_SIZE(before_vht),
949                                              offset);
950                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
951                 offset = noffset;
952         }
953
954         /* if present, add any custom IEs that go before HE */
955         if (assoc_data->ie_len) {
956                 static const u8 before_he[] = {
957                         /*
958                          * no need to list the ones split off before VHT
959                          * or generated here
960                          */
961                         WLAN_EID_OPMODE_NOTIF,
962                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
963                         /* 11ai elements */
964                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
965                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
966                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
967                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
968                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
969                         /* TODO: add 11ah/11aj/11ak elements */
970                 };
971
972                 /* RIC already taken above, so no need to handle here anymore */
973                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
974                                              before_he, ARRAY_SIZE(before_he),
975                                              offset);
976                 pos = skb_put(skb, noffset - offset);
977                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
978                 offset = noffset;
979         }
980
981         if (sband->band != NL80211_BAND_6GHZ &&
982             !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
983                 ieee80211_add_vht_ie(sdata, skb, sband,
984                                      &assoc_data->ap_vht_cap);
985
986         /*
987          * If AP doesn't support HT, mark HE as disabled.
988          * If on the 5GHz band, make sure it supports VHT.
989          */
990         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT ||
991             (sband->band == NL80211_BAND_5GHZ &&
992              ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
993                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
994
995         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
996                 ieee80211_add_he_ie(sdata, skb, sband);
997
998         /* if present, add any custom non-vendor IEs that go after HE */
999         if (assoc_data->ie_len) {
1000                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
1001                                                     assoc_data->ie_len,
1002                                                     offset);
1003                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
1004                 offset = noffset;
1005         }
1006
1007         if (assoc_data->wmm) {
1008                 if (assoc_data->uapsd) {
1009                         qos_info = ifmgd->uapsd_queues;
1010                         qos_info |= (ifmgd->uapsd_max_sp_len <<
1011                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
1012                 } else {
1013                         qos_info = 0;
1014                 }
1015
1016                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
1017         }
1018
1019         /* add any remaining custom (i.e. vendor specific here) IEs */
1020         if (assoc_data->ie_len) {
1021                 noffset = assoc_data->ie_len;
1022                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
1023         }
1024
1025         if (assoc_data->fils_kek_len &&
1026             fils_encrypt_assoc_req(skb, assoc_data) < 0) {
1027                 dev_kfree_skb(skb);
1028                 return;
1029         }
1030
1031         pos = skb_tail_pointer(skb);
1032         kfree(ifmgd->assoc_req_ies);
1033         ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC);
1034         ifmgd->assoc_req_ies_len = pos - ie_start;
1035
1036         drv_mgd_prepare_tx(local, sdata, 0);
1037
1038         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1039         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1040                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
1041                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
1042         ieee80211_tx_skb(sdata, skb);
1043 }
1044
1045 void ieee80211_send_pspoll(struct ieee80211_local *local,
1046                            struct ieee80211_sub_if_data *sdata)
1047 {
1048         struct ieee80211_pspoll *pspoll;
1049         struct sk_buff *skb;
1050
1051         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
1052         if (!skb)
1053                 return;
1054
1055         pspoll = (struct ieee80211_pspoll *) skb->data;
1056         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1057
1058         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1059         ieee80211_tx_skb(sdata, skb);
1060 }
1061
1062 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1063                              struct ieee80211_sub_if_data *sdata,
1064                              bool powersave)
1065 {
1066         struct sk_buff *skb;
1067         struct ieee80211_hdr_3addr *nullfunc;
1068         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1069
1070         /* Don't send NDPs when STA is connected HE */
1071         if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1072             !(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
1073                 return;
1074
1075         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
1076                 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
1077         if (!skb)
1078                 return;
1079
1080         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
1081         if (powersave)
1082                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1083
1084         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1085                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1086
1087         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1088                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
1089
1090         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1091                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1092
1093         ieee80211_tx_skb(sdata, skb);
1094 }
1095
1096 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
1097                                           struct ieee80211_sub_if_data *sdata)
1098 {
1099         struct sk_buff *skb;
1100         struct ieee80211_hdr *nullfunc;
1101         __le16 fc;
1102
1103         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1104                 return;
1105
1106         /* Don't send NDPs when connected HE */
1107         if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE))
1108                 return;
1109
1110         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1111         if (!skb)
1112                 return;
1113
1114         skb_reserve(skb, local->hw.extra_tx_headroom);
1115
1116         nullfunc = skb_put_zero(skb, 30);
1117         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
1118                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1119         nullfunc->frame_control = fc;
1120         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
1121         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1122         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
1123         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
1124
1125         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1126         ieee80211_tx_skb(sdata, skb);
1127 }
1128
1129 /* spectrum management related things */
1130 static void ieee80211_chswitch_work(struct work_struct *work)
1131 {
1132         struct ieee80211_sub_if_data *sdata =
1133                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
1134         struct ieee80211_local *local = sdata->local;
1135         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1136         int ret;
1137
1138         if (!ieee80211_sdata_running(sdata))
1139                 return;
1140
1141         sdata_lock(sdata);
1142         mutex_lock(&local->mtx);
1143         mutex_lock(&local->chanctx_mtx);
1144
1145         if (!ifmgd->associated)
1146                 goto out;
1147
1148         if (!sdata->vif.csa_active)
1149                 goto out;
1150
1151         /*
1152          * using reservation isn't immediate as it may be deferred until later
1153          * with multi-vif. once reservation is complete it will re-schedule the
1154          * work with no reserved_chanctx so verify chandef to check if it
1155          * completed successfully
1156          */
1157
1158         if (sdata->reserved_chanctx) {
1159                 struct ieee80211_supported_band *sband = NULL;
1160                 struct sta_info *mgd_sta = NULL;
1161                 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;
1162
1163                 /*
1164                  * with multi-vif csa driver may call ieee80211_csa_finish()
1165                  * many times while waiting for other interfaces to use their
1166                  * reservations
1167                  */
1168                 if (sdata->reserved_ready)
1169                         goto out;
1170
1171                 if (sdata->vif.bss_conf.chandef.width !=
1172                     sdata->csa_chandef.width) {
1173                         /*
1174                          * For managed interface, we need to also update the AP
1175                          * station bandwidth and align the rate scale algorithm
1176                          * on the bandwidth change. Here we only consider the
1177                          * bandwidth of the new channel definition (as channel
1178                          * switch flow does not have the full HT/VHT/HE
1179                          * information), assuming that if additional changes are
1180                          * required they would be done as part of the processing
1181                          * of the next beacon from the AP.
1182                          */
1183                         switch (sdata->csa_chandef.width) {
1184                         case NL80211_CHAN_WIDTH_20_NOHT:
1185                         case NL80211_CHAN_WIDTH_20:
1186                         default:
1187                                 bw = IEEE80211_STA_RX_BW_20;
1188                                 break;
1189                         case NL80211_CHAN_WIDTH_40:
1190                                 bw = IEEE80211_STA_RX_BW_40;
1191                                 break;
1192                         case NL80211_CHAN_WIDTH_80:
1193                                 bw = IEEE80211_STA_RX_BW_80;
1194                                 break;
1195                         case NL80211_CHAN_WIDTH_80P80:
1196                         case NL80211_CHAN_WIDTH_160:
1197                                 bw = IEEE80211_STA_RX_BW_160;
1198                                 break;
1199                         }
1200
1201                         mgd_sta = sta_info_get(sdata, ifmgd->bssid);
1202                         sband =
1203                                 local->hw.wiphy->bands[sdata->csa_chandef.chan->band];
1204                 }
1205
1206                 if (sdata->vif.bss_conf.chandef.width >
1207                     sdata->csa_chandef.width) {
1208                         mgd_sta->sta.bandwidth = bw;
1209                         rate_control_rate_update(local, sband, mgd_sta,
1210                                                  IEEE80211_RC_BW_CHANGED);
1211                 }
1212
1213                 ret = ieee80211_vif_use_reserved_context(sdata);
1214                 if (ret) {
1215                         sdata_info(sdata,
1216                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
1217                                    ret);
1218                         ieee80211_queue_work(&sdata->local->hw,
1219                                              &ifmgd->csa_connection_drop_work);
1220                         goto out;
1221                 }
1222
1223                 if (sdata->vif.bss_conf.chandef.width <
1224                     sdata->csa_chandef.width) {
1225                         mgd_sta->sta.bandwidth = bw;
1226                         rate_control_rate_update(local, sband, mgd_sta,
1227                                                  IEEE80211_RC_BW_CHANGED);
1228                 }
1229
1230                 goto out;
1231         }
1232
1233         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1234                                         &sdata->csa_chandef)) {
1235                 sdata_info(sdata,
1236                            "failed to finalize channel switch, disconnecting\n");
1237                 ieee80211_queue_work(&sdata->local->hw,
1238                                      &ifmgd->csa_connection_drop_work);
1239                 goto out;
1240         }
1241
1242         ifmgd->csa_waiting_bcn = true;
1243
1244         ieee80211_sta_reset_beacon_monitor(sdata);
1245         ieee80211_sta_reset_conn_monitor(sdata);
1246
1247 out:
1248         mutex_unlock(&local->chanctx_mtx);
1249         mutex_unlock(&local->mtx);
1250         sdata_unlock(sdata);
1251 }
1252
1253 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1254 {
1255         struct ieee80211_local *local = sdata->local;
1256         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1257         int ret;
1258
1259         sdata_assert_lock(sdata);
1260
1261         WARN_ON(!sdata->vif.csa_active);
1262
1263         if (sdata->csa_block_tx) {
1264                 ieee80211_wake_vif_queues(local, sdata,
1265                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1266                 sdata->csa_block_tx = false;
1267         }
1268
1269         sdata->vif.csa_active = false;
1270         ifmgd->csa_waiting_bcn = false;
1271
1272         ret = drv_post_channel_switch(sdata);
1273         if (ret) {
1274                 sdata_info(sdata,
1275                            "driver post channel switch failed, disconnecting\n");
1276                 ieee80211_queue_work(&local->hw,
1277                                      &ifmgd->csa_connection_drop_work);
1278                 return;
1279         }
1280
1281         cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1282 }
1283
1284 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1285 {
1286         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1287         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1288
1289         trace_api_chswitch_done(sdata, success);
1290         if (!success) {
1291                 sdata_info(sdata,
1292                            "driver channel switch failed, disconnecting\n");
1293                 ieee80211_queue_work(&sdata->local->hw,
1294                                      &ifmgd->csa_connection_drop_work);
1295         } else {
1296                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1297         }
1298 }
1299 EXPORT_SYMBOL(ieee80211_chswitch_done);
1300
1301 static void ieee80211_chswitch_timer(struct timer_list *t)
1302 {
1303         struct ieee80211_sub_if_data *sdata =
1304                 from_timer(sdata, t, u.mgd.chswitch_timer);
1305
1306         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1307 }
1308
1309 static void
1310 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata)
1311 {
1312         struct ieee80211_local *local = sdata->local;
1313
1314         if (!local->ops->abort_channel_switch)
1315                 return;
1316
1317         mutex_lock(&local->mtx);
1318
1319         mutex_lock(&local->chanctx_mtx);
1320         ieee80211_vif_unreserve_chanctx(sdata);
1321         mutex_unlock(&local->chanctx_mtx);
1322
1323         if (sdata->csa_block_tx)
1324                 ieee80211_wake_vif_queues(local, sdata,
1325                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1326
1327         sdata->csa_block_tx = false;
1328         sdata->vif.csa_active = false;
1329
1330         mutex_unlock(&local->mtx);
1331
1332         drv_abort_channel_switch(sdata);
1333 }
1334
1335 static void
1336 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1337                                  u64 timestamp, u32 device_timestamp,
1338                                  struct ieee802_11_elems *elems,
1339                                  bool beacon)
1340 {
1341         struct ieee80211_local *local = sdata->local;
1342         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1343         struct cfg80211_bss *cbss = ifmgd->associated;
1344         struct ieee80211_chanctx_conf *conf;
1345         struct ieee80211_chanctx *chanctx;
1346         enum nl80211_band current_band;
1347         struct ieee80211_csa_ie csa_ie;
1348         struct ieee80211_channel_switch ch_switch;
1349         struct ieee80211_bss *bss;
1350         int res;
1351
1352         sdata_assert_lock(sdata);
1353
1354         if (!cbss)
1355                 return;
1356
1357         if (local->scanning)
1358                 return;
1359
1360         current_band = cbss->channel->band;
1361         bss = (void *)cbss->priv;
1362         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1363                                            bss->vht_cap_info,
1364                                            ifmgd->flags,
1365                                            ifmgd->associated->bssid, &csa_ie);
1366
1367         if (!res) {
1368                 ch_switch.timestamp = timestamp;
1369                 ch_switch.device_timestamp = device_timestamp;
1370                 ch_switch.block_tx = csa_ie.mode;
1371                 ch_switch.chandef = csa_ie.chandef;
1372                 ch_switch.count = csa_ie.count;
1373                 ch_switch.delay = csa_ie.max_switch_time;
1374         }
1375
1376         if (res < 0) {
1377                 ieee80211_queue_work(&local->hw,
1378                                      &ifmgd->csa_connection_drop_work);
1379                 return;
1380         }
1381
1382         if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) {
1383                 if (res)
1384                         ieee80211_sta_abort_chanswitch(sdata);
1385                 else
1386                         drv_channel_switch_rx_beacon(sdata, &ch_switch);
1387                 return;
1388         } else if (sdata->vif.csa_active || res) {
1389                 /* disregard subsequent announcements if already processing */
1390                 return;
1391         }
1392
1393         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1394                                      IEEE80211_CHAN_DISABLED)) {
1395                 sdata_info(sdata,
1396                            "AP %pM switches to unsupported channel "
1397                            "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), "
1398                            "disconnecting\n",
1399                            ifmgd->associated->bssid,
1400                            csa_ie.chandef.chan->center_freq,
1401                            csa_ie.chandef.chan->freq_offset,
1402                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1403                            csa_ie.chandef.freq1_offset,
1404                            csa_ie.chandef.center_freq2);
1405                 ieee80211_queue_work(&local->hw,
1406                                      &ifmgd->csa_connection_drop_work);
1407                 return;
1408         }
1409
1410         if (cfg80211_chandef_identical(&csa_ie.chandef,
1411                                        &sdata->vif.bss_conf.chandef) &&
1412             (!csa_ie.mode || !beacon)) {
1413                 if (ifmgd->csa_ignored_same_chan)
1414                         return;
1415                 sdata_info(sdata,
1416                            "AP %pM tries to chanswitch to same channel, ignore\n",
1417                            ifmgd->associated->bssid);
1418                 ifmgd->csa_ignored_same_chan = true;
1419                 return;
1420         }
1421
1422         /*
1423          * Drop all TDLS peers - either we disconnect or move to a different
1424          * channel from this point on. There's no telling what our peer will do.
1425          * The TDLS WIDER_BW scenario is also problematic, as peers might now
1426          * have an incompatible wider chandef.
1427          */
1428         ieee80211_teardown_tdls_peers(sdata);
1429
1430         mutex_lock(&local->mtx);
1431         mutex_lock(&local->chanctx_mtx);
1432         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1433                                          lockdep_is_held(&local->chanctx_mtx));
1434         if (!conf) {
1435                 sdata_info(sdata,
1436                            "no channel context assigned to vif?, disconnecting\n");
1437                 goto drop_connection;
1438         }
1439
1440         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1441
1442         if (local->use_chanctx &&
1443             !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1444                 sdata_info(sdata,
1445                            "driver doesn't support chan-switch with channel contexts\n");
1446                 goto drop_connection;
1447         }
1448
1449         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1450                 sdata_info(sdata,
1451                            "preparing for channel switch failed, disconnecting\n");
1452                 goto drop_connection;
1453         }
1454
1455         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1456                                             chanctx->mode, false);
1457         if (res) {
1458                 sdata_info(sdata,
1459                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1460                            res);
1461                 goto drop_connection;
1462         }
1463         mutex_unlock(&local->chanctx_mtx);
1464
1465         sdata->vif.csa_active = true;
1466         sdata->csa_chandef = csa_ie.chandef;
1467         sdata->csa_block_tx = csa_ie.mode;
1468         ifmgd->csa_ignored_same_chan = false;
1469
1470         if (sdata->csa_block_tx)
1471                 ieee80211_stop_vif_queues(local, sdata,
1472                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1473         mutex_unlock(&local->mtx);
1474
1475         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1476                                           csa_ie.count);
1477
1478         if (local->ops->channel_switch) {
1479                 /* use driver's channel switch callback */
1480                 drv_channel_switch(local, sdata, &ch_switch);
1481                 return;
1482         }
1483
1484         /* channel switch handled in software */
1485         if (csa_ie.count <= 1)
1486                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1487         else
1488                 mod_timer(&ifmgd->chswitch_timer,
1489                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1490                                          cbss->beacon_interval));
1491         return;
1492  drop_connection:
1493         /*
1494          * This is just so that the disconnect flow will know that
1495          * we were trying to switch channel and failed. In case the
1496          * mode is 1 (we are not allowed to Tx), we will know not to
1497          * send a deauthentication frame. Those two fields will be
1498          * reset when the disconnection worker runs.
1499          */
1500         sdata->vif.csa_active = true;
1501         sdata->csa_block_tx = csa_ie.mode;
1502
1503         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1504         mutex_unlock(&local->chanctx_mtx);
1505         mutex_unlock(&local->mtx);
1506 }
1507
1508 static bool
1509 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1510                                  struct ieee80211_channel *channel,
1511                                  const u8 *country_ie, u8 country_ie_len,
1512                                  const u8 *pwr_constr_elem,
1513                                  int *chan_pwr, int *pwr_reduction)
1514 {
1515         struct ieee80211_country_ie_triplet *triplet;
1516         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1517         int i, chan_increment;
1518         bool have_chan_pwr = false;
1519
1520         /* Invalid IE */
1521         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1522                 return false;
1523
1524         triplet = (void *)(country_ie + 3);
1525         country_ie_len -= 3;
1526
1527         switch (channel->band) {
1528         default:
1529                 WARN_ON_ONCE(1);
1530                 /* fall through */
1531         case NL80211_BAND_2GHZ:
1532         case NL80211_BAND_60GHZ:
1533                 chan_increment = 1;
1534                 break;
1535         case NL80211_BAND_5GHZ:
1536         case NL80211_BAND_6GHZ:
1537                 chan_increment = 4;
1538                 break;
1539         }
1540
1541         /* find channel */
1542         while (country_ie_len >= 3) {
1543                 u8 first_channel = triplet->chans.first_channel;
1544
1545                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1546                         goto next;
1547
1548                 for (i = 0; i < triplet->chans.num_channels; i++) {
1549                         if (first_channel + i * chan_increment == chan) {
1550                                 have_chan_pwr = true;
1551                                 *chan_pwr = triplet->chans.max_power;
1552                                 break;
1553                         }
1554                 }
1555                 if (have_chan_pwr)
1556                         break;
1557
1558  next:
1559                 triplet++;
1560                 country_ie_len -= 3;
1561         }
1562
1563         if (have_chan_pwr && pwr_constr_elem)
1564                 *pwr_reduction = *pwr_constr_elem;
1565         else
1566                 *pwr_reduction = 0;
1567
1568         return have_chan_pwr;
1569 }
1570
1571 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1572                                       struct ieee80211_channel *channel,
1573                                       const u8 *cisco_dtpc_ie,
1574                                       int *pwr_level)
1575 {
1576         /* From practical testing, the first data byte of the DTPC element
1577          * seems to contain the requested dBm level, and the CLI on Cisco
1578          * APs clearly state the range is -127 to 127 dBm, which indicates
1579          * a signed byte, although it seemingly never actually goes negative.
1580          * The other byte seems to always be zero.
1581          */
1582         *pwr_level = (__s8)cisco_dtpc_ie[4];
1583 }
1584
1585 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1586                                        struct ieee80211_channel *channel,
1587                                        struct ieee80211_mgmt *mgmt,
1588                                        const u8 *country_ie, u8 country_ie_len,
1589                                        const u8 *pwr_constr_ie,
1590                                        const u8 *cisco_dtpc_ie)
1591 {
1592         bool has_80211h_pwr = false, has_cisco_pwr = false;
1593         int chan_pwr = 0, pwr_reduction_80211h = 0;
1594         int pwr_level_cisco, pwr_level_80211h;
1595         int new_ap_level;
1596         __le16 capab = mgmt->u.probe_resp.capab_info;
1597
1598         if (country_ie &&
1599             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1600              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1601                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1602                         sdata, channel, country_ie, country_ie_len,
1603                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1604                 pwr_level_80211h =
1605                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1606         }
1607
1608         if (cisco_dtpc_ie) {
1609                 ieee80211_find_cisco_dtpc(
1610                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1611                 has_cisco_pwr = true;
1612         }
1613
1614         if (!has_80211h_pwr && !has_cisco_pwr)
1615                 return 0;
1616
1617         /* If we have both 802.11h and Cisco DTPC, apply both limits
1618          * by picking the smallest of the two power levels advertised.
1619          */
1620         if (has_80211h_pwr &&
1621             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1622                 new_ap_level = pwr_level_80211h;
1623
1624                 if (sdata->ap_power_level == new_ap_level)
1625                         return 0;
1626
1627                 sdata_dbg(sdata,
1628                           "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1629                           pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1630                           sdata->u.mgd.bssid);
1631         } else {  /* has_cisco_pwr is always true here. */
1632                 new_ap_level = pwr_level_cisco;
1633
1634                 if (sdata->ap_power_level == new_ap_level)
1635                         return 0;
1636
1637                 sdata_dbg(sdata,
1638                           "Limiting TX power to %d dBm as advertised by %pM\n",
1639                           pwr_level_cisco, sdata->u.mgd.bssid);
1640         }
1641
1642         sdata->ap_power_level = new_ap_level;
1643         if (__ieee80211_recalc_txpower(sdata))
1644                 return BSS_CHANGED_TXPOWER;
1645         return 0;
1646 }
1647
1648 /* powersave */
1649 static void ieee80211_enable_ps(struct ieee80211_local *local,
1650                                 struct ieee80211_sub_if_data *sdata)
1651 {
1652         struct ieee80211_conf *conf = &local->hw.conf;
1653
1654         /*
1655          * If we are scanning right now then the parameters will
1656          * take effect when scan finishes.
1657          */
1658         if (local->scanning)
1659                 return;
1660
1661         if (conf->dynamic_ps_timeout > 0 &&
1662             !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1663                 mod_timer(&local->dynamic_ps_timer, jiffies +
1664                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1665         } else {
1666                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1667                         ieee80211_send_nullfunc(local, sdata, true);
1668
1669                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1670                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1671                         return;
1672
1673                 conf->flags |= IEEE80211_CONF_PS;
1674                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1675         }
1676 }
1677
1678 static void ieee80211_change_ps(struct ieee80211_local *local)
1679 {
1680         struct ieee80211_conf *conf = &local->hw.conf;
1681
1682         if (local->ps_sdata) {
1683                 ieee80211_enable_ps(local, local->ps_sdata);
1684         } else if (conf->flags & IEEE80211_CONF_PS) {
1685                 conf->flags &= ~IEEE80211_CONF_PS;
1686                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1687                 del_timer_sync(&local->dynamic_ps_timer);
1688                 cancel_work_sync(&local->dynamic_ps_enable_work);
1689         }
1690 }
1691
1692 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1693 {
1694         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1695         struct sta_info *sta = NULL;
1696         bool authorized = false;
1697
1698         if (!mgd->powersave)
1699                 return false;
1700
1701         if (mgd->broken_ap)
1702                 return false;
1703
1704         if (!mgd->associated)
1705                 return false;
1706
1707         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1708                 return false;
1709
1710         if (!mgd->have_beacon)
1711                 return false;
1712
1713         rcu_read_lock();
1714         sta = sta_info_get(sdata, mgd->bssid);
1715         if (sta)
1716                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1717         rcu_read_unlock();
1718
1719         return authorized;
1720 }
1721
1722 /* need to hold RTNL or interface lock */
1723 void ieee80211_recalc_ps(struct ieee80211_local *local)
1724 {
1725         struct ieee80211_sub_if_data *sdata, *found = NULL;
1726         int count = 0;
1727         int timeout;
1728
1729         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1730                 local->ps_sdata = NULL;
1731                 return;
1732         }
1733
1734         list_for_each_entry(sdata, &local->interfaces, list) {
1735                 if (!ieee80211_sdata_running(sdata))
1736                         continue;
1737                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1738                         /* If an AP vif is found, then disable PS
1739                          * by setting the count to zero thereby setting
1740                          * ps_sdata to NULL.
1741                          */
1742                         count = 0;
1743                         break;
1744                 }
1745                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1746                         continue;
1747                 found = sdata;
1748                 count++;
1749         }
1750
1751         if (count == 1 && ieee80211_powersave_allowed(found)) {
1752                 u8 dtimper = found->u.mgd.dtim_period;
1753
1754                 timeout = local->dynamic_ps_forced_timeout;
1755                 if (timeout < 0)
1756                         timeout = 100;
1757                 local->hw.conf.dynamic_ps_timeout = timeout;
1758
1759                 /* If the TIM IE is invalid, pretend the value is 1 */
1760                 if (!dtimper)
1761                         dtimper = 1;
1762
1763                 local->hw.conf.ps_dtim_period = dtimper;
1764                 local->ps_sdata = found;
1765         } else {
1766                 local->ps_sdata = NULL;
1767         }
1768
1769         ieee80211_change_ps(local);
1770 }
1771
1772 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1773 {
1774         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1775
1776         if (sdata->vif.bss_conf.ps != ps_allowed) {
1777                 sdata->vif.bss_conf.ps = ps_allowed;
1778                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1779         }
1780 }
1781
1782 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1783 {
1784         struct ieee80211_local *local =
1785                 container_of(work, struct ieee80211_local,
1786                              dynamic_ps_disable_work);
1787
1788         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1789                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1790                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1791         }
1792
1793         ieee80211_wake_queues_by_reason(&local->hw,
1794                                         IEEE80211_MAX_QUEUE_MAP,
1795                                         IEEE80211_QUEUE_STOP_REASON_PS,
1796                                         false);
1797 }
1798
1799 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1800 {
1801         struct ieee80211_local *local =
1802                 container_of(work, struct ieee80211_local,
1803                              dynamic_ps_enable_work);
1804         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1805         struct ieee80211_if_managed *ifmgd;
1806         unsigned long flags;
1807         int q;
1808
1809         /* can only happen when PS was just disabled anyway */
1810         if (!sdata)
1811                 return;
1812
1813         ifmgd = &sdata->u.mgd;
1814
1815         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1816                 return;
1817
1818         if (local->hw.conf.dynamic_ps_timeout > 0) {
1819                 /* don't enter PS if TX frames are pending */
1820                 if (drv_tx_frames_pending(local)) {
1821                         mod_timer(&local->dynamic_ps_timer, jiffies +
1822                                   msecs_to_jiffies(
1823                                   local->hw.conf.dynamic_ps_timeout));
1824                         return;
1825                 }
1826
1827                 /*
1828                  * transmission can be stopped by others which leads to
1829                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1830                  * is not the actual idle state.
1831                  */
1832                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1833                 for (q = 0; q < local->hw.queues; q++) {
1834                         if (local->queue_stop_reasons[q]) {
1835                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1836                                                        flags);
1837                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1838                                           msecs_to_jiffies(
1839                                           local->hw.conf.dynamic_ps_timeout));
1840                                 return;
1841                         }
1842                 }
1843                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1844         }
1845
1846         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1847             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1848                 if (drv_tx_frames_pending(local)) {
1849                         mod_timer(&local->dynamic_ps_timer, jiffies +
1850                                   msecs_to_jiffies(
1851                                   local->hw.conf.dynamic_ps_timeout));
1852                 } else {
1853                         ieee80211_send_nullfunc(local, sdata, true);
1854                         /* Flush to get the tx status of nullfunc frame */
1855                         ieee80211_flush_queues(local, sdata, false);
1856                 }
1857         }
1858
1859         if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1860               ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1861             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1862                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1863                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1864                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1865         }
1866 }
1867
1868 void ieee80211_dynamic_ps_timer(struct timer_list *t)
1869 {
1870         struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1871
1872         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1873 }
1874
1875 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1876 {
1877         struct delayed_work *delayed_work = to_delayed_work(work);
1878         struct ieee80211_sub_if_data *sdata =
1879                 container_of(delayed_work, struct ieee80211_sub_if_data,
1880                              dfs_cac_timer_work);
1881         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1882
1883         mutex_lock(&sdata->local->mtx);
1884         if (sdata->wdev.cac_started) {
1885                 ieee80211_vif_release_channel(sdata);
1886                 cfg80211_cac_event(sdata->dev, &chandef,
1887                                    NL80211_RADAR_CAC_FINISHED,
1888                                    GFP_KERNEL);
1889         }
1890         mutex_unlock(&sdata->local->mtx);
1891 }
1892
1893 static bool
1894 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1895 {
1896         struct ieee80211_local *local = sdata->local;
1897         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1898         bool ret = false;
1899         int ac;
1900
1901         if (local->hw.queues < IEEE80211_NUM_ACS)
1902                 return false;
1903
1904         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1905                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1906                 int non_acm_ac;
1907                 unsigned long now = jiffies;
1908
1909                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1910                     tx_tspec->admitted_time &&
1911                     time_after(now, tx_tspec->time_slice_start + HZ)) {
1912                         tx_tspec->consumed_tx_time = 0;
1913                         tx_tspec->time_slice_start = now;
1914
1915                         if (tx_tspec->downgraded)
1916                                 tx_tspec->action =
1917                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
1918                 }
1919
1920                 switch (tx_tspec->action) {
1921                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1922                         /* take the original parameters */
1923                         if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1924                                 sdata_err(sdata,
1925                                           "failed to set TX queue parameters for queue %d\n",
1926                                           ac);
1927                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1928                         tx_tspec->downgraded = false;
1929                         ret = true;
1930                         break;
1931                 case TX_TSPEC_ACTION_DOWNGRADE:
1932                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1933                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1934                                 ret = true;
1935                                 break;
1936                         }
1937                         /* downgrade next lower non-ACM AC */
1938                         for (non_acm_ac = ac + 1;
1939                              non_acm_ac < IEEE80211_NUM_ACS;
1940                              non_acm_ac++)
1941                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1942                                         break;
1943                         /* Usually the loop will result in using BK even if it
1944                          * requires admission control, but such a configuration
1945                          * makes no sense and we have to transmit somehow - the
1946                          * AC selection does the same thing.
1947                          * If we started out trying to downgrade from BK, then
1948                          * the extra condition here might be needed.
1949                          */
1950                         if (non_acm_ac >= IEEE80211_NUM_ACS)
1951                                 non_acm_ac = IEEE80211_AC_BK;
1952                         if (drv_conf_tx(local, sdata, ac,
1953                                         &sdata->tx_conf[non_acm_ac]))
1954                                 sdata_err(sdata,
1955                                           "failed to set TX queue parameters for queue %d\n",
1956                                           ac);
1957                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1958                         ret = true;
1959                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
1960                                 tx_tspec->time_slice_start + HZ - now + 1);
1961                         break;
1962                 case TX_TSPEC_ACTION_NONE:
1963                         /* nothing now */
1964                         break;
1965                 }
1966         }
1967
1968         return ret;
1969 }
1970
1971 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1972 {
1973         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1974                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1975 }
1976
1977 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1978 {
1979         struct ieee80211_sub_if_data *sdata;
1980
1981         sdata = container_of(work, struct ieee80211_sub_if_data,
1982                              u.mgd.tx_tspec_wk.work);
1983         ieee80211_sta_handle_tspec_ac_params(sdata);
1984 }
1985
1986 /* MLME */
1987 static bool
1988 ieee80211_sta_wmm_params(struct ieee80211_local *local,
1989                          struct ieee80211_sub_if_data *sdata,
1990                          const u8 *wmm_param, size_t wmm_param_len,
1991                          const struct ieee80211_mu_edca_param_set *mu_edca)
1992 {
1993         struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1994         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1995         size_t left;
1996         int count, mu_edca_count, ac;
1997         const u8 *pos;
1998         u8 uapsd_queues = 0;
1999
2000         if (!local->ops->conf_tx)
2001                 return false;
2002
2003         if (local->hw.queues < IEEE80211_NUM_ACS)
2004                 return false;
2005
2006         if (!wmm_param)
2007                 return false;
2008
2009         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
2010                 return false;
2011
2012         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
2013                 uapsd_queues = ifmgd->uapsd_queues;
2014
2015         count = wmm_param[6] & 0x0f;
2016         /* -1 is the initial value of ifmgd->mu_edca_last_param_set.
2017          * if mu_edca was preset before and now it disappeared tell
2018          * the driver about it.
2019          */
2020         mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1;
2021         if (count == ifmgd->wmm_last_param_set &&
2022             mu_edca_count == ifmgd->mu_edca_last_param_set)
2023                 return false;
2024         ifmgd->wmm_last_param_set = count;
2025         ifmgd->mu_edca_last_param_set = mu_edca_count;
2026
2027         pos = wmm_param + 8;
2028         left = wmm_param_len - 8;
2029
2030         memset(&params, 0, sizeof(params));
2031
2032         sdata->wmm_acm = 0;
2033         for (; left >= 4; left -= 4, pos += 4) {
2034                 int aci = (pos[0] >> 5) & 0x03;
2035                 int acm = (pos[0] >> 4) & 0x01;
2036                 bool uapsd = false;
2037
2038                 switch (aci) {
2039                 case 1: /* AC_BK */
2040                         ac = IEEE80211_AC_BK;
2041                         if (acm)
2042                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
2043                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
2044                                 uapsd = true;
2045                         params[ac].mu_edca = !!mu_edca;
2046                         if (mu_edca)
2047                                 params[ac].mu_edca_param_rec = mu_edca->ac_bk;
2048                         break;
2049                 case 2: /* AC_VI */
2050                         ac = IEEE80211_AC_VI;
2051                         if (acm)
2052                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
2053                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
2054                                 uapsd = true;
2055                         params[ac].mu_edca = !!mu_edca;
2056                         if (mu_edca)
2057                                 params[ac].mu_edca_param_rec = mu_edca->ac_vi;
2058                         break;
2059                 case 3: /* AC_VO */
2060                         ac = IEEE80211_AC_VO;
2061                         if (acm)
2062                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
2063                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
2064                                 uapsd = true;
2065                         params[ac].mu_edca = !!mu_edca;
2066                         if (mu_edca)
2067                                 params[ac].mu_edca_param_rec = mu_edca->ac_vo;
2068                         break;
2069                 case 0: /* AC_BE */
2070                 default:
2071                         ac = IEEE80211_AC_BE;
2072                         if (acm)
2073                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
2074                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
2075                                 uapsd = true;
2076                         params[ac].mu_edca = !!mu_edca;
2077                         if (mu_edca)
2078                                 params[ac].mu_edca_param_rec = mu_edca->ac_be;
2079                         break;
2080                 }
2081
2082                 params[ac].aifs = pos[0] & 0x0f;
2083
2084                 if (params[ac].aifs < 2) {
2085                         sdata_info(sdata,
2086                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
2087                                    params[ac].aifs, aci);
2088                         params[ac].aifs = 2;
2089                 }
2090                 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
2091                 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
2092                 params[ac].txop = get_unaligned_le16(pos + 2);
2093                 params[ac].acm = acm;
2094                 params[ac].uapsd = uapsd;
2095
2096                 if (params[ac].cw_min == 0 ||
2097                     params[ac].cw_min > params[ac].cw_max) {
2098                         sdata_info(sdata,
2099                                    "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
2100                                    params[ac].cw_min, params[ac].cw_max, aci);
2101                         return false;
2102                 }
2103                 ieee80211_regulatory_limit_wmm_params(sdata, &params[ac], ac);
2104         }
2105
2106         /* WMM specification requires all 4 ACIs. */
2107         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2108                 if (params[ac].cw_min == 0) {
2109                         sdata_info(sdata,
2110                                    "AP has invalid WMM params (missing AC %d), using defaults\n",
2111                                    ac);
2112                         return false;
2113                 }
2114         }
2115
2116         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2117                 mlme_dbg(sdata,
2118                          "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
2119                          ac, params[ac].acm,
2120                          params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
2121                          params[ac].txop, params[ac].uapsd,
2122                          ifmgd->tx_tspec[ac].downgraded);
2123                 sdata->tx_conf[ac] = params[ac];
2124                 if (!ifmgd->tx_tspec[ac].downgraded &&
2125                     drv_conf_tx(local, sdata, ac, &params[ac]))
2126                         sdata_err(sdata,
2127                                   "failed to set TX queue parameters for AC %d\n",
2128                                   ac);
2129         }
2130
2131         /* enable WMM or activate new settings */
2132         sdata->vif.bss_conf.qos = true;
2133         return true;
2134 }
2135
2136 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2137 {
2138         lockdep_assert_held(&sdata->local->mtx);
2139
2140         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2141         ieee80211_run_deferred_scan(sdata->local);
2142 }
2143
2144 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2145 {
2146         mutex_lock(&sdata->local->mtx);
2147         __ieee80211_stop_poll(sdata);
2148         mutex_unlock(&sdata->local->mtx);
2149 }
2150
2151 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
2152                                            u16 capab, bool erp_valid, u8 erp)
2153 {
2154         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2155         struct ieee80211_supported_band *sband;
2156         u32 changed = 0;
2157         bool use_protection;
2158         bool use_short_preamble;
2159         bool use_short_slot;
2160
2161         sband = ieee80211_get_sband(sdata);
2162         if (!sband)
2163                 return changed;
2164
2165         if (erp_valid) {
2166                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
2167                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
2168         } else {
2169                 use_protection = false;
2170                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
2171         }
2172
2173         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
2174         if (sband->band == NL80211_BAND_5GHZ ||
2175             sband->band == NL80211_BAND_6GHZ)
2176                 use_short_slot = true;
2177
2178         if (use_protection != bss_conf->use_cts_prot) {
2179                 bss_conf->use_cts_prot = use_protection;
2180                 changed |= BSS_CHANGED_ERP_CTS_PROT;
2181         }
2182
2183         if (use_short_preamble != bss_conf->use_short_preamble) {
2184                 bss_conf->use_short_preamble = use_short_preamble;
2185                 changed |= BSS_CHANGED_ERP_PREAMBLE;
2186         }
2187
2188         if (use_short_slot != bss_conf->use_short_slot) {
2189                 bss_conf->use_short_slot = use_short_slot;
2190                 changed |= BSS_CHANGED_ERP_SLOT;
2191         }
2192
2193         return changed;
2194 }
2195
2196 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2197                                      struct cfg80211_bss *cbss,
2198                                      u32 bss_info_changed)
2199 {
2200         struct ieee80211_bss *bss = (void *)cbss->priv;
2201         struct ieee80211_local *local = sdata->local;
2202         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2203
2204         bss_info_changed |= BSS_CHANGED_ASSOC;
2205         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
2206                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
2207
2208         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
2209                 beacon_loss_count * bss_conf->beacon_int));
2210
2211         sdata->u.mgd.associated = cbss;
2212         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2213
2214         ieee80211_check_rate_mask(sdata);
2215
2216         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
2217
2218         if (sdata->vif.p2p ||
2219             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2220                 const struct cfg80211_bss_ies *ies;
2221
2222                 rcu_read_lock();
2223                 ies = rcu_dereference(cbss->ies);
2224                 if (ies) {
2225                         int ret;
2226
2227                         ret = cfg80211_get_p2p_attr(
2228                                         ies->data, ies->len,
2229                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2230                                         (u8 *) &bss_conf->p2p_noa_attr,
2231                                         sizeof(bss_conf->p2p_noa_attr));
2232                         if (ret >= 2) {
2233                                 sdata->u.mgd.p2p_noa_index =
2234                                         bss_conf->p2p_noa_attr.index;
2235                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
2236                         }
2237                 }
2238                 rcu_read_unlock();
2239         }
2240
2241         /* just to be sure */
2242         ieee80211_stop_poll(sdata);
2243
2244         ieee80211_led_assoc(local, 1);
2245
2246         if (sdata->u.mgd.have_beacon) {
2247                 /*
2248                  * If the AP is buggy we may get here with no DTIM period
2249                  * known, so assume it's 1 which is the only safe assumption
2250                  * in that case, although if the TIM IE is broken powersave
2251                  * probably just won't work at all.
2252                  */
2253                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
2254                 bss_conf->beacon_rate = bss->beacon_rate;
2255                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2256         } else {
2257                 bss_conf->beacon_rate = NULL;
2258                 bss_conf->dtim_period = 0;
2259         }
2260
2261         bss_conf->assoc = 1;
2262
2263         /* Tell the driver to monitor connection quality (if supported) */
2264         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2265             bss_conf->cqm_rssi_thold)
2266                 bss_info_changed |= BSS_CHANGED_CQM;
2267
2268         /* Enable ARP filtering */
2269         if (bss_conf->arp_addr_cnt)
2270                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
2271
2272         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2273
2274         mutex_lock(&local->iflist_mtx);
2275         ieee80211_recalc_ps(local);
2276         mutex_unlock(&local->iflist_mtx);
2277
2278         ieee80211_recalc_smps(sdata);
2279         ieee80211_recalc_ps_vif(sdata);
2280
2281         netif_carrier_on(sdata->dev);
2282 }
2283
2284 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2285                                    u16 stype, u16 reason, bool tx,
2286                                    u8 *frame_buf)
2287 {
2288         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2289         struct ieee80211_local *local = sdata->local;
2290         u32 changed = 0;
2291
2292         sdata_assert_lock(sdata);
2293
2294         if (WARN_ON_ONCE(tx && !frame_buf))
2295                 return;
2296
2297         if (WARN_ON(!ifmgd->associated))
2298                 return;
2299
2300         ieee80211_stop_poll(sdata);
2301
2302         ifmgd->associated = NULL;
2303         netif_carrier_off(sdata->dev);
2304
2305         /*
2306          * if we want to get out of ps before disassoc (why?) we have
2307          * to do it before sending disassoc, as otherwise the null-packet
2308          * won't be valid.
2309          */
2310         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2311                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2312                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2313         }
2314         local->ps_sdata = NULL;
2315
2316         /* disable per-vif ps */
2317         ieee80211_recalc_ps_vif(sdata);
2318
2319         /* make sure ongoing transmission finishes */
2320         synchronize_net();
2321
2322         /*
2323          * drop any frame before deauth/disassoc, this can be data or
2324          * management frame. Since we are disconnecting, we should not
2325          * insist sending these frames which can take time and delay
2326          * the disconnection and possible the roaming.
2327          */
2328         if (tx)
2329                 ieee80211_flush_queues(local, sdata, true);
2330
2331         /* deauthenticate/disassociate now */
2332         if (tx || frame_buf) {
2333                 /*
2334                  * In multi channel scenarios guarantee that the virtual
2335                  * interface is granted immediate airtime to transmit the
2336                  * deauthentication frame by calling mgd_prepare_tx, if the
2337                  * driver requested so.
2338                  */
2339                 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
2340                     !ifmgd->have_beacon)
2341                         drv_mgd_prepare_tx(sdata->local, sdata, 0);
2342
2343                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid,
2344                                                ifmgd->bssid, stype, reason,
2345                                                tx, frame_buf);
2346         }
2347
2348         /* flush out frame - make sure the deauth was actually sent */
2349         if (tx)
2350                 ieee80211_flush_queues(local, sdata, false);
2351
2352         /* clear bssid only after building the needed mgmt frames */
2353         eth_zero_addr(ifmgd->bssid);
2354
2355         /* remove AP and TDLS peers */
2356         sta_info_flush(sdata);
2357
2358         /* finally reset all BSS / config parameters */
2359         changed |= ieee80211_reset_erp_info(sdata);
2360
2361         ieee80211_led_assoc(local, 0);
2362         changed |= BSS_CHANGED_ASSOC;
2363         sdata->vif.bss_conf.assoc = false;
2364
2365         ifmgd->p2p_noa_index = -1;
2366         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2367                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2368
2369         /* on the next assoc, re-program HT/VHT parameters */
2370         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2371         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2372         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2373         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2374
2375         /* reset MU-MIMO ownership and group data */
2376         memset(sdata->vif.bss_conf.mu_group.membership, 0,
2377                sizeof(sdata->vif.bss_conf.mu_group.membership));
2378         memset(sdata->vif.bss_conf.mu_group.position, 0,
2379                sizeof(sdata->vif.bss_conf.mu_group.position));
2380         changed |= BSS_CHANGED_MU_GROUPS;
2381         sdata->vif.mu_mimo_owner = false;
2382
2383         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2384
2385         del_timer_sync(&local->dynamic_ps_timer);
2386         cancel_work_sync(&local->dynamic_ps_enable_work);
2387
2388         /* Disable ARP filtering */
2389         if (sdata->vif.bss_conf.arp_addr_cnt)
2390                 changed |= BSS_CHANGED_ARP_FILTER;
2391
2392         sdata->vif.bss_conf.qos = false;
2393         changed |= BSS_CHANGED_QOS;
2394
2395         /* The BSSID (not really interesting) and HT changed */
2396         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2397         ieee80211_bss_info_change_notify(sdata, changed);
2398
2399         /* disassociated - set to defaults now */
2400         ieee80211_set_wmm_default(sdata, false, false);
2401
2402         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2403         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2404         del_timer_sync(&sdata->u.mgd.timer);
2405         del_timer_sync(&sdata->u.mgd.chswitch_timer);
2406
2407         sdata->vif.bss_conf.dtim_period = 0;
2408         sdata->vif.bss_conf.beacon_rate = NULL;
2409
2410         ifmgd->have_beacon = false;
2411
2412         ifmgd->flags = 0;
2413         mutex_lock(&local->mtx);
2414         ieee80211_vif_release_channel(sdata);
2415
2416         sdata->vif.csa_active = false;
2417         ifmgd->csa_waiting_bcn = false;
2418         ifmgd->csa_ignored_same_chan = false;
2419         if (sdata->csa_block_tx) {
2420                 ieee80211_wake_vif_queues(local, sdata,
2421                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2422                 sdata->csa_block_tx = false;
2423         }
2424         mutex_unlock(&local->mtx);
2425
2426         /* existing TX TSPEC sessions no longer exist */
2427         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2428         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2429
2430         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2431 }
2432
2433 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2434                              struct ieee80211_hdr *hdr)
2435 {
2436         /*
2437          * We can postpone the mgd.timer whenever receiving unicast frames
2438          * from AP because we know that the connection is working both ways
2439          * at that time. But multicast frames (and hence also beacons) must
2440          * be ignored here, because we need to trigger the timer during
2441          * data idle periods for sending the periodic probe request to the
2442          * AP we're connected to.
2443          */
2444         if (is_multicast_ether_addr(hdr->addr1))
2445                 return;
2446
2447         ieee80211_sta_reset_conn_monitor(sdata);
2448 }
2449
2450 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2451 {
2452         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2453         struct ieee80211_local *local = sdata->local;
2454
2455         mutex_lock(&local->mtx);
2456         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2457                 goto out;
2458
2459         __ieee80211_stop_poll(sdata);
2460
2461         mutex_lock(&local->iflist_mtx);
2462         ieee80211_recalc_ps(local);
2463         mutex_unlock(&local->iflist_mtx);
2464
2465         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2466                 goto out;
2467
2468         /*
2469          * We've received a probe response, but are not sure whether
2470          * we have or will be receiving any beacons or data, so let's
2471          * schedule the timers again, just in case.
2472          */
2473         ieee80211_sta_reset_beacon_monitor(sdata);
2474
2475         mod_timer(&ifmgd->conn_mon_timer,
2476                   round_jiffies_up(jiffies +
2477                                    IEEE80211_CONNECTION_IDLE_TIME));
2478 out:
2479         mutex_unlock(&local->mtx);
2480 }
2481
2482 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2483                                            struct ieee80211_hdr *hdr,
2484                                            u16 tx_time)
2485 {
2486         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2487         u16 tid = ieee80211_get_tid(hdr);
2488         int ac = ieee80211_ac_from_tid(tid);
2489         struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2490         unsigned long now = jiffies;
2491
2492         if (likely(!tx_tspec->admitted_time))
2493                 return;
2494
2495         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2496                 tx_tspec->consumed_tx_time = 0;
2497                 tx_tspec->time_slice_start = now;
2498
2499                 if (tx_tspec->downgraded) {
2500                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2501                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2502                 }
2503         }
2504
2505         if (tx_tspec->downgraded)
2506                 return;
2507
2508         tx_tspec->consumed_tx_time += tx_time;
2509
2510         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2511                 tx_tspec->downgraded = true;
2512                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2513                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2514         }
2515 }
2516
2517 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2518                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2519 {
2520         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2521
2522         if (!ieee80211_is_data(hdr->frame_control))
2523             return;
2524
2525         if (ieee80211_is_any_nullfunc(hdr->frame_control) &&
2526             sdata->u.mgd.probe_send_count > 0) {
2527                 if (ack)
2528                         ieee80211_sta_reset_conn_monitor(sdata);
2529                 else
2530                         sdata->u.mgd.nullfunc_failed = true;
2531                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2532                 return;
2533         }
2534
2535         if (ack)
2536                 ieee80211_sta_reset_conn_monitor(sdata);
2537 }
2538
2539 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
2540                                           const u8 *src, const u8 *dst,
2541                                           const u8 *ssid, size_t ssid_len,
2542                                           struct ieee80211_channel *channel)
2543 {
2544         struct sk_buff *skb;
2545
2546         skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
2547                                         ssid, ssid_len, NULL, 0,
2548                                         IEEE80211_PROBE_FLAG_DIRECTED);
2549         if (skb)
2550                 ieee80211_tx_skb(sdata, skb);
2551 }
2552
2553 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2554 {
2555         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2556         const u8 *ssid;
2557         u8 *dst = ifmgd->associated->bssid;
2558         u8 unicast_limit = max(1, max_probe_tries - 3);
2559         struct sta_info *sta;
2560
2561         /*
2562          * Try sending broadcast probe requests for the last three
2563          * probe requests after the first ones failed since some
2564          * buggy APs only support broadcast probe requests.
2565          */
2566         if (ifmgd->probe_send_count >= unicast_limit)
2567                 dst = NULL;
2568
2569         /*
2570          * When the hardware reports an accurate Tx ACK status, it's
2571          * better to send a nullfunc frame instead of a probe request,
2572          * as it will kick us off the AP quickly if we aren't associated
2573          * anymore. The timeout will be reset if the frame is ACKed by
2574          * the AP.
2575          */
2576         ifmgd->probe_send_count++;
2577
2578         if (dst) {
2579                 mutex_lock(&sdata->local->sta_mtx);
2580                 sta = sta_info_get(sdata, dst);
2581                 if (!WARN_ON(!sta))
2582                         ieee80211_check_fast_rx(sta);
2583                 mutex_unlock(&sdata->local->sta_mtx);
2584         }
2585
2586         if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2587                 ifmgd->nullfunc_failed = false;
2588                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
2589                         ifmgd->probe_send_count--;
2590                 else
2591                         ieee80211_send_nullfunc(sdata->local, sdata, false);
2592         } else {
2593                 int ssid_len;
2594
2595                 rcu_read_lock();
2596                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2597                 if (WARN_ON_ONCE(ssid == NULL))
2598                         ssid_len = 0;
2599                 else
2600                         ssid_len = ssid[1];
2601
2602                 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
2603                                               ssid + 2, ssid_len,
2604                                               ifmgd->associated->channel);
2605                 rcu_read_unlock();
2606         }
2607
2608         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2609         run_again(sdata, ifmgd->probe_timeout);
2610 }
2611
2612 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2613                                    bool beacon)
2614 {
2615         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2616         bool already = false;
2617
2618         if (!ieee80211_sdata_running(sdata))
2619                 return;
2620
2621         sdata_lock(sdata);
2622
2623         if (!ifmgd->associated)
2624                 goto out;
2625
2626         mutex_lock(&sdata->local->mtx);
2627
2628         if (sdata->local->tmp_channel || sdata->local->scanning) {
2629                 mutex_unlock(&sdata->local->mtx);
2630                 goto out;
2631         }
2632
2633         if (beacon) {
2634                 mlme_dbg_ratelimited(sdata,
2635                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2636                                      beacon_loss_count);
2637
2638                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2639         }
2640
2641         /*
2642          * The driver/our work has already reported this event or the
2643          * connection monitoring has kicked in and we have already sent
2644          * a probe request. Or maybe the AP died and the driver keeps
2645          * reporting until we disassociate...
2646          *
2647          * In either case we have to ignore the current call to this
2648          * function (except for setting the correct probe reason bit)
2649          * because otherwise we would reset the timer every time and
2650          * never check whether we received a probe response!
2651          */
2652         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2653                 already = true;
2654
2655         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2656
2657         mutex_unlock(&sdata->local->mtx);
2658
2659         if (already)
2660                 goto out;
2661
2662         mutex_lock(&sdata->local->iflist_mtx);
2663         ieee80211_recalc_ps(sdata->local);
2664         mutex_unlock(&sdata->local->iflist_mtx);
2665
2666         ifmgd->probe_send_count = 0;
2667         ieee80211_mgd_probe_ap_send(sdata);
2668  out:
2669         sdata_unlock(sdata);
2670 }
2671
2672 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2673                                           struct ieee80211_vif *vif)
2674 {
2675         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2676         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2677         struct cfg80211_bss *cbss;
2678         struct sk_buff *skb;
2679         const u8 *ssid;
2680         int ssid_len;
2681
2682         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2683                 return NULL;
2684
2685         sdata_assert_lock(sdata);
2686
2687         if (ifmgd->associated)
2688                 cbss = ifmgd->associated;
2689         else if (ifmgd->auth_data)
2690                 cbss = ifmgd->auth_data->bss;
2691         else if (ifmgd->assoc_data)
2692                 cbss = ifmgd->assoc_data->bss;
2693         else
2694                 return NULL;
2695
2696         rcu_read_lock();
2697         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2698         if (WARN_ONCE(!ssid || ssid[1] > IEEE80211_MAX_SSID_LEN,
2699                       "invalid SSID element (len=%d)", ssid ? ssid[1] : -1))
2700                 ssid_len = 0;
2701         else
2702                 ssid_len = ssid[1];
2703
2704         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2705                                         (u32) -1, cbss->channel,
2706                                         ssid + 2, ssid_len,
2707                                         NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
2708         rcu_read_unlock();
2709
2710         return skb;
2711 }
2712 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2713
2714 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2715                                         const u8 *buf, size_t len, bool tx,
2716                                         u16 reason)
2717 {
2718         struct ieee80211_event event = {
2719                 .type = MLME_EVENT,
2720                 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2721                 .u.mlme.reason = reason,
2722         };
2723
2724         if (tx)
2725                 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2726         else
2727                 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2728
2729         drv_event_callback(sdata->local, sdata, &event);
2730 }
2731
2732 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2733 {
2734         struct ieee80211_local *local = sdata->local;
2735         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2736         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2737         bool tx;
2738
2739         sdata_lock(sdata);
2740         if (!ifmgd->associated) {
2741                 sdata_unlock(sdata);
2742                 return;
2743         }
2744
2745         tx = !sdata->csa_block_tx;
2746
2747         /* AP is probably out of range (or not reachable for another reason) so
2748          * remove the bss struct for that AP.
2749          */
2750         cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2751
2752         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2753                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2754                                tx, frame_buf);
2755         mutex_lock(&local->mtx);
2756         sdata->vif.csa_active = false;
2757         ifmgd->csa_waiting_bcn = false;
2758         if (sdata->csa_block_tx) {
2759                 ieee80211_wake_vif_queues(local, sdata,
2760                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2761                 sdata->csa_block_tx = false;
2762         }
2763         mutex_unlock(&local->mtx);
2764
2765         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
2766                                     WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2767
2768         sdata_unlock(sdata);
2769 }
2770
2771 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2772 {
2773         struct ieee80211_sub_if_data *sdata =
2774                 container_of(work, struct ieee80211_sub_if_data,
2775                              u.mgd.beacon_connection_loss_work);
2776         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2777
2778         if (ifmgd->associated)
2779                 ifmgd->beacon_loss_count++;
2780
2781         if (ifmgd->connection_loss) {
2782                 sdata_info(sdata, "Connection to AP %pM lost\n",
2783                            ifmgd->bssid);
2784                 __ieee80211_disconnect(sdata);
2785         } else {
2786                 ieee80211_mgd_probe_ap(sdata, true);
2787         }
2788 }
2789
2790 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2791 {
2792         struct ieee80211_sub_if_data *sdata =
2793                 container_of(work, struct ieee80211_sub_if_data,
2794                              u.mgd.csa_connection_drop_work);
2795
2796         __ieee80211_disconnect(sdata);
2797 }
2798
2799 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2800 {
2801         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2802         struct ieee80211_hw *hw = &sdata->local->hw;
2803
2804         trace_api_beacon_loss(sdata);
2805
2806         sdata->u.mgd.connection_loss = false;
2807         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2808 }
2809 EXPORT_SYMBOL(ieee80211_beacon_loss);
2810
2811 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2812 {
2813         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2814         struct ieee80211_hw *hw = &sdata->local->hw;
2815
2816         trace_api_connection_loss(sdata);
2817
2818         sdata->u.mgd.connection_loss = true;
2819         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2820 }
2821 EXPORT_SYMBOL(ieee80211_connection_loss);
2822
2823
2824 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2825                                         bool assoc)
2826 {
2827         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2828
2829         sdata_assert_lock(sdata);
2830
2831         if (!assoc) {
2832                 /*
2833                  * we are not authenticated yet, the only timer that could be
2834                  * running is the timeout for the authentication response which
2835                  * which is not relevant anymore.
2836                  */
2837                 del_timer_sync(&sdata->u.mgd.timer);
2838                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2839
2840                 eth_zero_addr(sdata->u.mgd.bssid);
2841                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2842                 sdata->u.mgd.flags = 0;
2843                 mutex_lock(&sdata->local->mtx);
2844                 ieee80211_vif_release_channel(sdata);
2845                 mutex_unlock(&sdata->local->mtx);
2846         }
2847
2848         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2849         kfree(auth_data);
2850         sdata->u.mgd.auth_data = NULL;
2851 }
2852
2853 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2854                                          bool assoc, bool abandon)
2855 {
2856         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2857
2858         sdata_assert_lock(sdata);
2859
2860         if (!assoc) {
2861                 /*
2862                  * we are not associated yet, the only timer that could be
2863                  * running is the timeout for the association response which
2864                  * which is not relevant anymore.
2865                  */
2866                 del_timer_sync(&sdata->u.mgd.timer);
2867                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2868
2869                 eth_zero_addr(sdata->u.mgd.bssid);
2870                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2871                 sdata->u.mgd.flags = 0;
2872                 sdata->vif.mu_mimo_owner = false;
2873
2874                 mutex_lock(&sdata->local->mtx);
2875                 ieee80211_vif_release_channel(sdata);
2876                 mutex_unlock(&sdata->local->mtx);
2877
2878                 if (abandon)
2879                         cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2880         }
2881
2882         kfree(assoc_data);
2883         sdata->u.mgd.assoc_data = NULL;
2884 }
2885
2886 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2887                                      struct ieee80211_mgmt *mgmt, size_t len)
2888 {
2889         struct ieee80211_local *local = sdata->local;
2890         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2891         u8 *pos;
2892         struct ieee802_11_elems elems;
2893         u32 tx_flags = 0;
2894
2895         pos = mgmt->u.auth.variable;
2896         ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
2897                                mgmt->bssid, auth_data->bss->bssid);
2898         if (!elems.challenge)
2899                 return;
2900         auth_data->expected_transaction = 4;
2901         drv_mgd_prepare_tx(sdata->local, sdata, 0);
2902         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2903                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2904                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2905         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2906                             elems.challenge - 2, elems.challenge_len + 2,
2907                             auth_data->bss->bssid, auth_data->bss->bssid,
2908                             auth_data->key, auth_data->key_len,
2909                             auth_data->key_idx, tx_flags);
2910 }
2911
2912 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata,
2913                                     const u8 *bssid)
2914 {
2915         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2916         struct sta_info *sta;
2917         bool result = true;
2918
2919         sdata_info(sdata, "authenticated\n");
2920         ifmgd->auth_data->done = true;
2921         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2922         ifmgd->auth_data->timeout_started = true;
2923         run_again(sdata, ifmgd->auth_data->timeout);
2924
2925         /* move station state to auth */
2926         mutex_lock(&sdata->local->sta_mtx);
2927         sta = sta_info_get(sdata, bssid);
2928         if (!sta) {
2929                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2930                 result = false;
2931                 goto out;
2932         }
2933         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2934                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2935                 result = false;
2936                 goto out;
2937         }
2938
2939 out:
2940         mutex_unlock(&sdata->local->sta_mtx);
2941         return result;
2942 }
2943
2944 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2945                                    struct ieee80211_mgmt *mgmt, size_t len)
2946 {
2947         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2948         u8 bssid[ETH_ALEN];
2949         u16 auth_alg, auth_transaction, status_code;
2950         struct ieee80211_event event = {
2951                 .type = MLME_EVENT,
2952                 .u.mlme.data = AUTH_EVENT,
2953         };
2954
2955         sdata_assert_lock(sdata);
2956
2957         if (len < 24 + 6)
2958                 return;
2959
2960         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2961                 return;
2962
2963         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2964
2965         if (!ether_addr_equal(bssid, mgmt->bssid))
2966                 return;
2967
2968         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2969         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2970         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2971
2972         if (auth_alg != ifmgd->auth_data->algorithm ||
2973             (auth_alg != WLAN_AUTH_SAE &&
2974              auth_transaction != ifmgd->auth_data->expected_transaction) ||
2975             (auth_alg == WLAN_AUTH_SAE &&
2976              (auth_transaction < ifmgd->auth_data->expected_transaction ||
2977               auth_transaction > 2))) {
2978                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2979                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2980                            auth_transaction,
2981                            ifmgd->auth_data->expected_transaction);
2982                 return;
2983         }
2984
2985         if (status_code != WLAN_STATUS_SUCCESS) {
2986                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2987
2988                 if (auth_alg == WLAN_AUTH_SAE &&
2989                     status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED)
2990                         return;
2991
2992                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2993                            mgmt->sa, status_code);
2994                 ieee80211_destroy_auth_data(sdata, false);
2995                 event.u.mlme.status = MLME_DENIED;
2996                 event.u.mlme.reason = status_code;
2997                 drv_event_callback(sdata->local, sdata, &event);
2998                 return;
2999         }
3000
3001         switch (ifmgd->auth_data->algorithm) {
3002         case WLAN_AUTH_OPEN:
3003         case WLAN_AUTH_LEAP:
3004         case WLAN_AUTH_FT:
3005         case WLAN_AUTH_SAE:
3006         case WLAN_AUTH_FILS_SK:
3007         case WLAN_AUTH_FILS_SK_PFS:
3008         case WLAN_AUTH_FILS_PK:
3009                 break;
3010         case WLAN_AUTH_SHARED_KEY:
3011                 if (ifmgd->auth_data->expected_transaction != 4) {
3012                         ieee80211_auth_challenge(sdata, mgmt, len);
3013                         /* need another frame */
3014                         return;
3015                 }
3016                 break;
3017         default:
3018                 WARN_ONCE(1, "invalid auth alg %d",
3019                           ifmgd->auth_data->algorithm);
3020                 return;
3021         }
3022
3023         event.u.mlme.status = MLME_SUCCESS;
3024         drv_event_callback(sdata->local, sdata, &event);
3025         if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
3026             (auth_transaction == 2 &&
3027              ifmgd->auth_data->expected_transaction == 2)) {
3028                 if (!ieee80211_mark_sta_auth(sdata, bssid))
3029                         return; /* ignore frame -- wait for timeout */
3030         } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
3031                    auth_transaction == 2) {
3032                 sdata_info(sdata, "SAE peer confirmed\n");
3033                 ifmgd->auth_data->peer_confirmed = true;
3034         }
3035
3036         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3037 }
3038
3039 #define case_WLAN(type) \
3040         case WLAN_REASON_##type: return #type
3041
3042 const char *ieee80211_get_reason_code_string(u16 reason_code)
3043 {
3044         switch (reason_code) {
3045         case_WLAN(UNSPECIFIED);
3046         case_WLAN(PREV_AUTH_NOT_VALID);
3047         case_WLAN(DEAUTH_LEAVING);
3048         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
3049         case_WLAN(DISASSOC_AP_BUSY);
3050         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
3051         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
3052         case_WLAN(DISASSOC_STA_HAS_LEFT);
3053         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
3054         case_WLAN(DISASSOC_BAD_POWER);
3055         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
3056         case_WLAN(INVALID_IE);
3057         case_WLAN(MIC_FAILURE);
3058         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
3059         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
3060         case_WLAN(IE_DIFFERENT);
3061         case_WLAN(INVALID_GROUP_CIPHER);
3062         case_WLAN(INVALID_PAIRWISE_CIPHER);
3063         case_WLAN(INVALID_AKMP);
3064         case_WLAN(UNSUPP_RSN_VERSION);
3065         case_WLAN(INVALID_RSN_IE_CAP);
3066         case_WLAN(IEEE8021X_FAILED);
3067         case_WLAN(CIPHER_SUITE_REJECTED);
3068         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
3069         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
3070         case_WLAN(DISASSOC_LOW_ACK);
3071         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
3072         case_WLAN(QSTA_LEAVE_QBSS);
3073         case_WLAN(QSTA_NOT_USE);
3074         case_WLAN(QSTA_REQUIRE_SETUP);
3075         case_WLAN(QSTA_TIMEOUT);
3076         case_WLAN(QSTA_CIPHER_NOT_SUPP);
3077         case_WLAN(MESH_PEER_CANCELED);
3078         case_WLAN(MESH_MAX_PEERS);
3079         case_WLAN(MESH_CONFIG);
3080         case_WLAN(MESH_CLOSE);
3081         case_WLAN(MESH_MAX_RETRIES);
3082         case_WLAN(MESH_CONFIRM_TIMEOUT);
3083         case_WLAN(MESH_INVALID_GTK);
3084         case_WLAN(MESH_INCONSISTENT_PARAM);
3085         case_WLAN(MESH_INVALID_SECURITY);
3086         case_WLAN(MESH_PATH_ERROR);
3087         case_WLAN(MESH_PATH_NOFORWARD);
3088         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
3089         case_WLAN(MAC_EXISTS_IN_MBSS);
3090         case_WLAN(MESH_CHAN_REGULATORY);
3091         case_WLAN(MESH_CHAN);
3092         default: return "<unknown>";
3093         }
3094 }
3095
3096 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
3097                                      struct ieee80211_mgmt *mgmt, size_t len)
3098 {
3099         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3100         u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
3101
3102         sdata_assert_lock(sdata);
3103
3104         if (len < 24 + 2)
3105                 return;
3106
3107         if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3108                 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3109                 return;
3110         }
3111
3112         if (ifmgd->associated &&
3113             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
3114                 const u8 *bssid = ifmgd->associated->bssid;
3115
3116                 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
3117                            bssid, reason_code,
3118                            ieee80211_get_reason_code_string(reason_code));
3119
3120                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3121
3122                 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
3123                                             reason_code);
3124                 return;
3125         }
3126
3127         if (ifmgd->assoc_data &&
3128             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3129                 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
3130
3131                 sdata_info(sdata,
3132                            "deauthenticated from %pM while associating (Reason: %u=%s)\n",
3133                            bssid, reason_code,
3134                            ieee80211_get_reason_code_string(reason_code));
3135
3136                 ieee80211_destroy_assoc_data(sdata, false, true);
3137
3138                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3139                 return;
3140         }
3141 }
3142
3143
3144 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
3145                                        struct ieee80211_mgmt *mgmt, size_t len)
3146 {
3147         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3148         u16 reason_code;
3149
3150         sdata_assert_lock(sdata);
3151
3152         if (len < 24 + 2)
3153                 return;
3154
3155         if (!ifmgd->associated ||
3156             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3157                 return;
3158
3159         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
3160
3161         if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3162                 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3163                 return;
3164         }
3165
3166         sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
3167                    mgmt->sa, reason_code,
3168                    ieee80211_get_reason_code_string(reason_code));
3169
3170         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3171
3172         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
3173 }
3174
3175 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
3176                                 u8 *supp_rates, unsigned int supp_rates_len,
3177                                 u32 *rates, u32 *basic_rates,
3178                                 bool *have_higher_than_11mbit,
3179                                 int *min_rate, int *min_rate_index,
3180                                 int shift)
3181 {
3182         int i, j;
3183
3184         for (i = 0; i < supp_rates_len; i++) {
3185                 int rate = supp_rates[i] & 0x7f;
3186                 bool is_basic = !!(supp_rates[i] & 0x80);
3187
3188                 if ((rate * 5 * (1 << shift)) > 110)
3189                         *have_higher_than_11mbit = true;
3190
3191                 /*
3192                  * Skip HT, VHT and HE BSS membership selectors since they're
3193                  * not rates.
3194                  *
3195                  * Note: Even though the membership selector and the basic
3196                  *       rate flag share the same bit, they are not exactly
3197                  *       the same.
3198                  */
3199                 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3200                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) ||
3201                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY))
3202                         continue;
3203
3204                 for (j = 0; j < sband->n_bitrates; j++) {
3205                         struct ieee80211_rate *br;
3206                         int brate;
3207
3208                         br = &sband->bitrates[j];
3209
3210                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3211                         if (brate == rate) {
3212                                 *rates |= BIT(j);
3213                                 if (is_basic)
3214                                         *basic_rates |= BIT(j);
3215                                 if ((rate * 5) < *min_rate) {
3216                                         *min_rate = rate * 5;
3217                                         *min_rate_index = j;
3218                                 }
3219                                 break;
3220                         }
3221                 }
3222         }
3223 }
3224
3225 static bool ieee80211_twt_req_supported(const struct sta_info *sta,
3226                                         const struct ieee802_11_elems *elems)
3227 {
3228         if (elems->ext_capab_len < 10)
3229                 return false;
3230
3231         if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
3232                 return false;
3233
3234         return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] &
3235                 IEEE80211_HE_MAC_CAP0_TWT_RES;
3236 }
3237
3238 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata,
3239                                     struct sta_info *sta,
3240                                     struct ieee802_11_elems *elems)
3241 {
3242         bool twt = ieee80211_twt_req_supported(sta, elems);
3243
3244         if (sdata->vif.bss_conf.twt_requester != twt) {
3245                 sdata->vif.bss_conf.twt_requester = twt;
3246                 return BSS_CHANGED_TWT;
3247         }
3248         return 0;
3249 }
3250
3251 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
3252                                     struct cfg80211_bss *cbss,
3253                                     struct ieee80211_mgmt *mgmt, size_t len,
3254                                     struct ieee802_11_elems *elems)
3255 {
3256         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3257         struct ieee80211_local *local = sdata->local;
3258         struct ieee80211_supported_band *sband;
3259         struct sta_info *sta;
3260         u16 capab_info, aid;
3261         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3262         const struct cfg80211_bss_ies *bss_ies = NULL;
3263         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3264         bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
3265         u32 changed = 0;
3266         int err;
3267         bool ret;
3268
3269         /* AssocResp and ReassocResp have identical structure */
3270
3271         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3272         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3273
3274         /*
3275          * The 5 MSB of the AID field are reserved
3276          * (802.11-2016 9.4.1.8 AID field)
3277          */
3278         aid &= 0x7ff;
3279
3280         ifmgd->broken_ap = false;
3281
3282         if (aid == 0 || aid > IEEE80211_MAX_AID) {
3283                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
3284                            aid);
3285                 aid = 0;
3286                 ifmgd->broken_ap = true;
3287         }
3288
3289         if (!elems->supp_rates) {
3290                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
3291                 return false;
3292         }
3293
3294         sdata->vif.bss_conf.aid = aid;
3295         ifmgd->tdls_chan_switch_prohibited =
3296                 elems->ext_capab && elems->ext_capab_len >= 5 &&
3297                 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3298
3299         /*
3300          * Some APs are erroneously not including some information in their
3301          * (re)association response frames. Try to recover by using the data
3302          * from the beacon or probe response. This seems to afflict mobile
3303          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
3304          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
3305          */
3306         if (!is_6ghz &&
3307             ((assoc_data->wmm && !elems->wmm_param) ||
3308              (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3309               (!elems->ht_cap_elem || !elems->ht_operation)) ||
3310              (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3311               (!elems->vht_cap_elem || !elems->vht_operation)))) {
3312                 const struct cfg80211_bss_ies *ies;
3313                 struct ieee802_11_elems bss_elems;
3314
3315                 rcu_read_lock();
3316                 ies = rcu_dereference(cbss->ies);
3317                 if (ies)
3318                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3319                                           GFP_ATOMIC);
3320                 rcu_read_unlock();
3321                 if (!bss_ies)
3322                         return false;
3323
3324                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
3325                                        false, &bss_elems,
3326                                        mgmt->bssid,
3327                                        assoc_data->bss->bssid);
3328                 if (assoc_data->wmm &&
3329                     !elems->wmm_param && bss_elems.wmm_param) {
3330                         elems->wmm_param = bss_elems.wmm_param;
3331                         sdata_info(sdata,
3332                                    "AP bug: WMM param missing from AssocResp\n");
3333                 }
3334
3335                 /*
3336                  * Also check if we requested HT/VHT, otherwise the AP doesn't
3337                  * have to include the IEs in the (re)association response.
3338                  */
3339                 if (!elems->ht_cap_elem && bss_elems.ht_cap_elem &&
3340                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3341                         elems->ht_cap_elem = bss_elems.ht_cap_elem;
3342                         sdata_info(sdata,
3343                                    "AP bug: HT capability missing from AssocResp\n");
3344                 }
3345                 if (!elems->ht_operation && bss_elems.ht_operation &&
3346                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3347                         elems->ht_operation = bss_elems.ht_operation;
3348                         sdata_info(sdata,
3349                                    "AP bug: HT operation missing from AssocResp\n");
3350                 }
3351                 if (!elems->vht_cap_elem && bss_elems.vht_cap_elem &&
3352                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3353                         elems->vht_cap_elem = bss_elems.vht_cap_elem;
3354                         sdata_info(sdata,
3355                                    "AP bug: VHT capa missing from AssocResp\n");
3356                 }
3357                 if (!elems->vht_operation && bss_elems.vht_operation &&
3358                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3359                         elems->vht_operation = bss_elems.vht_operation;
3360                         sdata_info(sdata,
3361                                    "AP bug: VHT operation missing from AssocResp\n");
3362                 }
3363         }
3364
3365         /*
3366          * We previously checked these in the beacon/probe response, so
3367          * they should be present here. This is just a safety net.
3368          */
3369         if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3370             (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) {
3371                 sdata_info(sdata,
3372                            "HT AP is missing WMM params or HT capability/operation\n");
3373                 ret = false;
3374                 goto out;
3375         }
3376
3377         if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3378             (!elems->vht_cap_elem || !elems->vht_operation)) {
3379                 sdata_info(sdata,
3380                            "VHT AP is missing VHT capability/operation\n");
3381                 ret = false;
3382                 goto out;
3383         }
3384
3385         if (is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3386             !elems->he_6ghz_capa) {
3387                 sdata_info(sdata,
3388                            "HE 6 GHz AP is missing HE 6 GHz band capability\n");
3389                 ret = false;
3390                 goto out;
3391         }
3392
3393         mutex_lock(&sdata->local->sta_mtx);
3394         /*
3395          * station info was already allocated and inserted before
3396          * the association and should be available to us
3397          */
3398         sta = sta_info_get(sdata, cbss->bssid);
3399         if (WARN_ON(!sta)) {
3400                 mutex_unlock(&sdata->local->sta_mtx);
3401                 ret = false;
3402                 goto out;
3403         }
3404
3405         sband = ieee80211_get_sband(sdata);
3406         if (!sband) {
3407                 mutex_unlock(&sdata->local->sta_mtx);
3408                 ret = false;
3409                 goto out;
3410         }
3411
3412         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3413             (!elems->he_cap || !elems->he_operation)) {
3414                 mutex_unlock(&sdata->local->sta_mtx);
3415                 sdata_info(sdata,
3416                            "HE AP is missing HE capability/operation\n");
3417                 ret = false;
3418                 goto out;
3419         }
3420
3421         /* Set up internal HT/VHT capabilities */
3422         if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3423                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3424                                                   elems->ht_cap_elem, sta);
3425
3426         if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3427                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3428                                                     elems->vht_cap_elem, sta);
3429
3430         if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3431             elems->he_cap) {
3432                 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
3433                                                   elems->he_cap,
3434                                                   elems->he_cap_len,
3435                                                   elems->he_6ghz_capa,
3436                                                   sta);
3437
3438                 bss_conf->he_support = sta->sta.he_cap.has_he;
3439                 if (elems->rsnx && elems->rsnx_len &&
3440                     (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) &&
3441                     wiphy_ext_feature_isset(local->hw.wiphy,
3442                                             NL80211_EXT_FEATURE_PROTECTED_TWT))
3443                         bss_conf->twt_protected = true;
3444                 else
3445                         bss_conf->twt_protected = false;
3446
3447                 changed |= ieee80211_recalc_twt_req(sdata, sta, elems);
3448         } else {
3449                 bss_conf->he_support = false;
3450                 bss_conf->twt_requester = false;
3451                 bss_conf->twt_protected = false;
3452         }
3453
3454         if (bss_conf->he_support) {
3455                 bss_conf->he_bss_color.color =
3456                         le32_get_bits(elems->he_operation->he_oper_params,
3457                                       IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
3458                 bss_conf->he_bss_color.partial =
3459                         le32_get_bits(elems->he_operation->he_oper_params,
3460                                       IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR);
3461                 bss_conf->he_bss_color.disabled =
3462                         le32_get_bits(elems->he_operation->he_oper_params,
3463                                       IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3464                 changed |= BSS_CHANGED_HE_BSS_COLOR;
3465
3466                 bss_conf->htc_trig_based_pkt_ext =
3467                         le32_get_bits(elems->he_operation->he_oper_params,
3468                               IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
3469                 bss_conf->frame_time_rts_th =
3470                         le32_get_bits(elems->he_operation->he_oper_params,
3471                               IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3472
3473                 bss_conf->multi_sta_back_32bit =
3474                         sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3475                         IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP;
3476
3477                 bss_conf->ack_enabled =
3478                         sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3479                         IEEE80211_HE_MAC_CAP2_ACK_EN;
3480
3481                 bss_conf->uora_exists = !!elems->uora_element;
3482                 if (elems->uora_element)
3483                         bss_conf->uora_ocw_range = elems->uora_element[0];
3484
3485                 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation);
3486                 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr);
3487                 /* TODO: OPEN: what happens if BSS color disable is set? */
3488         }
3489
3490         if (cbss->transmitted_bss) {
3491                 bss_conf->nontransmitted = true;
3492                 ether_addr_copy(bss_conf->transmitter_bssid,
3493                                 cbss->transmitted_bss->bssid);
3494                 bss_conf->bssid_indicator = cbss->max_bssid_indicator;
3495                 bss_conf->bssid_index = cbss->bssid_index;
3496         }
3497
3498         /*
3499          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3500          * in their association response, so ignore that data for our own
3501          * configuration. If it changed since the last beacon, we'll get the
3502          * next beacon and update then.
3503          */
3504
3505         /*
3506          * If an operating mode notification IE is present, override the
3507          * NSS calculation (that would be done in rate_control_rate_init())
3508          * and use the # of streams from that element.
3509          */
3510         if (elems->opmode_notif &&
3511             !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3512                 u8 nss;
3513
3514                 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3515                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3516                 nss += 1;
3517                 sta->sta.rx_nss = nss;
3518         }
3519
3520         rate_control_rate_init(sta);
3521
3522         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3523                 set_sta_flag(sta, WLAN_STA_MFP);
3524                 sta->sta.mfp = true;
3525         } else {
3526                 sta->sta.mfp = false;
3527         }
3528
3529         sta->sta.wme = elems->wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3530
3531         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3532         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3533                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3534         if (err) {
3535                 sdata_info(sdata,
3536                            "failed to move station %pM to desired state\n",
3537                            sta->sta.addr);
3538                 WARN_ON(__sta_info_destroy(sta));
3539                 mutex_unlock(&sdata->local->sta_mtx);
3540                 ret = false;
3541                 goto out;
3542         }
3543
3544         mutex_unlock(&sdata->local->sta_mtx);
3545
3546         /*
3547          * Always handle WMM once after association regardless
3548          * of the first value the AP uses. Setting -1 here has
3549          * that effect because the AP values is an unsigned
3550          * 4-bit value.
3551          */
3552         ifmgd->wmm_last_param_set = -1;
3553         ifmgd->mu_edca_last_param_set = -1;
3554
3555         if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3556                 ieee80211_set_wmm_default(sdata, false, false);
3557         } else if (!ieee80211_sta_wmm_params(local, sdata, elems->wmm_param,
3558                                              elems->wmm_param_len,
3559                                              elems->mu_edca_param_set)) {
3560                 /* still enable QoS since we might have HT/VHT */
3561                 ieee80211_set_wmm_default(sdata, false, true);
3562                 /* set the disable-WMM flag in this case to disable
3563                  * tracking WMM parameter changes in the beacon if
3564                  * the parameters weren't actually valid. Doing so
3565                  * avoids changing parameters very strangely when
3566                  * the AP is going back and forth between valid and
3567                  * invalid parameters.
3568                  */
3569                 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3570         }
3571         changed |= BSS_CHANGED_QOS;
3572
3573         if (elems->max_idle_period_ie) {
3574                 bss_conf->max_idle_period =
3575                         le16_to_cpu(elems->max_idle_period_ie->max_idle_period);
3576                 bss_conf->protected_keep_alive =
3577                         !!(elems->max_idle_period_ie->idle_options &
3578                            WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3579                 changed |= BSS_CHANGED_KEEP_ALIVE;
3580         } else {
3581                 bss_conf->max_idle_period = 0;
3582                 bss_conf->protected_keep_alive = false;
3583         }
3584
3585         /* set assoc capability (AID was already set earlier),
3586          * ieee80211_set_associated() will tell the driver */
3587         bss_conf->assoc_capability = capab_info;
3588         ieee80211_set_associated(sdata, cbss, changed);
3589
3590         /*
3591          * If we're using 4-addr mode, let the AP know that we're
3592          * doing so, so that it can create the STA VLAN on its side
3593          */
3594         if (ifmgd->use_4addr)
3595                 ieee80211_send_4addr_nullfunc(local, sdata);
3596
3597         /*
3598          * Start timer to probe the connection to the AP now.
3599          * Also start the timer that will detect beacon loss.
3600          */
3601         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3602         ieee80211_sta_reset_beacon_monitor(sdata);
3603
3604         ret = true;
3605  out:
3606         kfree(bss_ies);
3607         return ret;
3608 }
3609
3610 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3611                                          struct ieee80211_mgmt *mgmt,
3612                                          size_t len)
3613 {
3614         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3615         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3616         u16 capab_info, status_code, aid;
3617         struct ieee802_11_elems elems;
3618         int ac, uapsd_queues = -1;
3619         u8 *pos;
3620         bool reassoc;
3621         struct cfg80211_bss *bss;
3622         struct ieee80211_event event = {
3623                 .type = MLME_EVENT,
3624                 .u.mlme.data = ASSOC_EVENT,
3625         };
3626
3627         sdata_assert_lock(sdata);
3628
3629         if (!assoc_data)
3630                 return;
3631         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3632                 return;
3633
3634         /*
3635          * AssocResp and ReassocResp have identical structure, so process both
3636          * of them in this function.
3637          */
3638
3639         if (len < 24 + 6)
3640                 return;
3641
3642         reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
3643         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3644         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3645         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3646
3647         sdata_info(sdata,
3648                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3649                    reassoc ? "Rea" : "A", mgmt->sa,
3650                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3651
3652         if (assoc_data->fils_kek_len &&
3653             fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3654                 return;
3655
3656         pos = mgmt->u.assoc_resp.variable;
3657         ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
3658                                mgmt->bssid, assoc_data->bss->bssid);
3659
3660         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3661             elems.timeout_int &&
3662             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3663                 u32 tu, ms;
3664                 tu = le32_to_cpu(elems.timeout_int->value);
3665                 ms = tu * 1024 / 1000;
3666                 sdata_info(sdata,
3667                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3668                            mgmt->sa, tu, ms);
3669                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3670                 assoc_data->timeout_started = true;
3671                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3672                         run_again(sdata, assoc_data->timeout);
3673                 return;
3674         }
3675
3676         bss = assoc_data->bss;
3677
3678         if (status_code != WLAN_STATUS_SUCCESS) {
3679                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3680                            mgmt->sa, status_code);
3681                 ieee80211_destroy_assoc_data(sdata, false, false);
3682                 event.u.mlme.status = MLME_DENIED;
3683                 event.u.mlme.reason = status_code;
3684                 drv_event_callback(sdata->local, sdata, &event);
3685         } else {
3686                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len, &elems)) {
3687                         /* oops -- internal error -- send timeout for now */
3688                         ieee80211_destroy_assoc_data(sdata, false, false);
3689                         cfg80211_assoc_timeout(sdata->dev, bss);
3690                         return;
3691                 }
3692                 event.u.mlme.status = MLME_SUCCESS;
3693                 drv_event_callback(sdata->local, sdata, &event);
3694                 sdata_info(sdata, "associated\n");
3695
3696                 /*
3697                  * destroy assoc_data afterwards, as otherwise an idle
3698                  * recalc after assoc_data is NULL but before associated
3699                  * is set can cause the interface to go idle
3700                  */
3701                 ieee80211_destroy_assoc_data(sdata, true, false);
3702
3703                 /* get uapsd queues configuration */
3704                 uapsd_queues = 0;
3705                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3706                         if (sdata->tx_conf[ac].uapsd)
3707                                 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3708         }
3709
3710         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues,
3711                                ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len);
3712 }
3713
3714 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3715                                   struct ieee80211_mgmt *mgmt, size_t len,
3716                                   struct ieee80211_rx_status *rx_status)
3717 {
3718         struct ieee80211_local *local = sdata->local;
3719         struct ieee80211_bss *bss;
3720         struct ieee80211_channel *channel;
3721
3722         sdata_assert_lock(sdata);
3723
3724         channel = ieee80211_get_channel_khz(local->hw.wiphy,
3725                                         ieee80211_rx_status_to_khz(rx_status));
3726         if (!channel)
3727                 return;
3728
3729         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
3730         if (bss) {
3731                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3732                 ieee80211_rx_bss_put(local, bss);
3733         }
3734 }
3735
3736
3737 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3738                                          struct sk_buff *skb)
3739 {
3740         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3741         struct ieee80211_if_managed *ifmgd;
3742         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3743         struct ieee80211_channel *channel;
3744         size_t baselen, len = skb->len;
3745
3746         ifmgd = &sdata->u.mgd;
3747
3748         sdata_assert_lock(sdata);
3749
3750         /*
3751          * According to Draft P802.11ax D6.0 clause 26.17.2.3.2:
3752          * "If a 6 GHz AP receives a Probe Request frame  and responds with
3753          * a Probe Response frame [..], the Address 1 field of the Probe
3754          * Response frame shall be set to the broadcast address [..]"
3755          * So, on 6GHz band we should also accept broadcast responses.
3756          */
3757         channel = ieee80211_get_channel(sdata->local->hw.wiphy,
3758                                         rx_status->freq);
3759         if (!channel)
3760                 return;
3761
3762         if (!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
3763             (channel->band != NL80211_BAND_6GHZ ||
3764              !is_broadcast_ether_addr(mgmt->da)))
3765                 return; /* ignore ProbeResp to foreign address */
3766
3767         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3768         if (baselen > len)
3769                 return;
3770
3771         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3772
3773         if (ifmgd->associated &&
3774             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3775                 ieee80211_reset_ap_probe(sdata);
3776 }
3777
3778 /*
3779  * This is the canonical list of information elements we care about,
3780  * the filter code also gives us all changes to the Microsoft OUI
3781  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3782  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3783  * changes to requested client power.
3784  *
3785  * We implement beacon filtering in software since that means we can
3786  * avoid processing the frame here and in cfg80211, and userspace
3787  * will not be able to tell whether the hardware supports it or not.
3788  *
3789  * XXX: This list needs to be dynamic -- userspace needs to be able to
3790  *      add items it requires. It also needs to be able to tell us to
3791  *      look out for other vendor IEs.
3792  */
3793 static const u64 care_about_ies =
3794         (1ULL << WLAN_EID_COUNTRY) |
3795         (1ULL << WLAN_EID_ERP_INFO) |
3796         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3797         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3798         (1ULL << WLAN_EID_HT_CAPABILITY) |
3799         (1ULL << WLAN_EID_HT_OPERATION) |
3800         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3801
3802 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata,
3803                                         struct ieee80211_if_managed *ifmgd,
3804                                         struct ieee80211_bss_conf *bss_conf,
3805                                         struct ieee80211_local *local,
3806                                         struct ieee80211_rx_status *rx_status)
3807 {
3808         /* Track average RSSI from the Beacon frames of the current AP */
3809
3810         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3811                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3812                 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3813                 ifmgd->last_cqm_event_signal = 0;
3814                 ifmgd->count_beacon_signal = 1;
3815                 ifmgd->last_ave_beacon_signal = 0;
3816         } else {
3817                 ifmgd->count_beacon_signal++;
3818         }
3819
3820         ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3821
3822         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3823             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3824                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3825                 int last_sig = ifmgd->last_ave_beacon_signal;
3826                 struct ieee80211_event event = {
3827                         .type = RSSI_EVENT,
3828                 };
3829
3830                 /*
3831                  * if signal crosses either of the boundaries, invoke callback
3832                  * with appropriate parameters
3833                  */
3834                 if (sig > ifmgd->rssi_max_thold &&
3835                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3836                         ifmgd->last_ave_beacon_signal = sig;
3837                         event.u.rssi.data = RSSI_EVENT_HIGH;
3838                         drv_event_callback(local, sdata, &event);
3839                 } else if (sig < ifmgd->rssi_min_thold &&
3840                            (last_sig >= ifmgd->rssi_max_thold ||
3841                            last_sig == 0)) {
3842                         ifmgd->last_ave_beacon_signal = sig;
3843                         event.u.rssi.data = RSSI_EVENT_LOW;
3844                         drv_event_callback(local, sdata, &event);
3845                 }
3846         }
3847
3848         if (bss_conf->cqm_rssi_thold &&
3849             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3850             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3851                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3852                 int last_event = ifmgd->last_cqm_event_signal;
3853                 int thold = bss_conf->cqm_rssi_thold;
3854                 int hyst = bss_conf->cqm_rssi_hyst;
3855
3856                 if (sig < thold &&
3857                     (last_event == 0 || sig < last_event - hyst)) {
3858                         ifmgd->last_cqm_event_signal = sig;
3859                         ieee80211_cqm_rssi_notify(
3860                                 &sdata->vif,
3861                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3862                                 sig, GFP_KERNEL);
3863                 } else if (sig > thold &&
3864                            (last_event == 0 || sig > last_event + hyst)) {
3865                         ifmgd->last_cqm_event_signal = sig;
3866                         ieee80211_cqm_rssi_notify(
3867                                 &sdata->vif,
3868                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3869                                 sig, GFP_KERNEL);
3870                 }
3871         }
3872
3873         if (bss_conf->cqm_rssi_low &&
3874             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3875                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3876                 int last_event = ifmgd->last_cqm_event_signal;
3877                 int low = bss_conf->cqm_rssi_low;
3878                 int high = bss_conf->cqm_rssi_high;
3879
3880                 if (sig < low &&
3881                     (last_event == 0 || last_event >= low)) {
3882                         ifmgd->last_cqm_event_signal = sig;
3883                         ieee80211_cqm_rssi_notify(
3884                                 &sdata->vif,
3885                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3886                                 sig, GFP_KERNEL);
3887                 } else if (sig > high &&
3888                            (last_event == 0 || last_event <= high)) {
3889                         ifmgd->last_cqm_event_signal = sig;
3890                         ieee80211_cqm_rssi_notify(
3891                                 &sdata->vif,
3892                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3893                                 sig, GFP_KERNEL);
3894                 }
3895         }
3896 }
3897
3898 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
3899                                     struct cfg80211_bss *bss)
3900 {
3901         if (ether_addr_equal(tx_bssid, bss->bssid))
3902                 return true;
3903         if (!bss->transmitted_bss)
3904                 return false;
3905         return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid);
3906 }
3907
3908 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3909                                      struct ieee80211_mgmt *mgmt, size_t len,
3910                                      struct ieee80211_rx_status *rx_status)
3911 {
3912         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3913         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3914         size_t baselen;
3915         struct ieee802_11_elems elems;
3916         struct ieee80211_local *local = sdata->local;
3917         struct ieee80211_chanctx_conf *chanctx_conf;
3918         struct ieee80211_channel *chan;
3919         struct sta_info *sta;
3920         u32 changed = 0;
3921         bool erp_valid;
3922         u8 erp_value = 0;
3923         u32 ncrc;
3924         u8 *bssid;
3925         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3926
3927         sdata_assert_lock(sdata);
3928
3929         /* Process beacon from the current BSS */
3930         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3931         if (baselen > len)
3932                 return;
3933
3934         rcu_read_lock();
3935         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3936         if (!chanctx_conf) {
3937                 rcu_read_unlock();
3938                 return;
3939         }
3940
3941         if (ieee80211_rx_status_to_khz(rx_status) !=
3942             ieee80211_channel_to_khz(chanctx_conf->def.chan)) {
3943                 rcu_read_unlock();
3944                 return;
3945         }
3946         chan = chanctx_conf->def.chan;
3947         rcu_read_unlock();
3948
3949         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3950             ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->assoc_data->bss)) {
3951                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3952                                        len - baselen, false, &elems,
3953                                        mgmt->bssid,
3954                                        ifmgd->assoc_data->bss->bssid);
3955
3956                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3957
3958                 if (elems.dtim_period)
3959                         ifmgd->dtim_period = elems.dtim_period;
3960                 ifmgd->have_beacon = true;
3961                 ifmgd->assoc_data->need_beacon = false;
3962                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3963                         sdata->vif.bss_conf.sync_tsf =
3964                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3965                         sdata->vif.bss_conf.sync_device_ts =
3966                                 rx_status->device_timestamp;
3967                         sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
3968                 }
3969
3970                 if (elems.mbssid_config_ie)
3971                         bss_conf->profile_periodicity =
3972                                 elems.mbssid_config_ie->profile_periodicity;
3973
3974                 if (elems.ext_capab_len >= 11 &&
3975                     (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
3976                         bss_conf->ema_ap = true;
3977
3978                 /* continue assoc process */
3979                 ifmgd->assoc_data->timeout = jiffies;
3980                 ifmgd->assoc_data->timeout_started = true;
3981                 run_again(sdata, ifmgd->assoc_data->timeout);
3982                 return;
3983         }
3984
3985         if (!ifmgd->associated ||
3986             !ieee80211_rx_our_beacon(mgmt->bssid,  ifmgd->associated))
3987                 return;
3988         bssid = ifmgd->associated->bssid;
3989
3990         if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
3991                 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf,
3992                                             local, rx_status);
3993
3994         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3995                 mlme_dbg_ratelimited(sdata,
3996                                      "cancelling AP probe due to a received beacon\n");
3997                 ieee80211_reset_ap_probe(sdata);
3998         }
3999
4000         /*
4001          * Push the beacon loss detection into the future since
4002          * we are processing a beacon from the AP just now.
4003          */
4004         ieee80211_sta_reset_beacon_monitor(sdata);
4005
4006         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
4007         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
4008                                           len - baselen, false, &elems,
4009                                           care_about_ies, ncrc,
4010                                           mgmt->bssid, bssid);
4011
4012         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
4013             ieee80211_check_tim(elems.tim, elems.tim_len, bss_conf->aid)) {
4014                 if (local->hw.conf.dynamic_ps_timeout > 0) {
4015                         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
4016                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
4017                                 ieee80211_hw_config(local,
4018                                                     IEEE80211_CONF_CHANGE_PS);
4019                         }
4020                         ieee80211_send_nullfunc(local, sdata, false);
4021                 } else if (!local->pspolling && sdata->u.mgd.powersave) {
4022                         local->pspolling = true;
4023
4024                         /*
4025                          * Here is assumed that the driver will be
4026                          * able to send ps-poll frame and receive a
4027                          * response even though power save mode is
4028                          * enabled, but some drivers might require
4029                          * to disable power save here. This needs
4030                          * to be investigated.
4031                          */
4032                         ieee80211_send_pspoll(local, sdata);
4033                 }
4034         }
4035
4036         if (sdata->vif.p2p ||
4037             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
4038                 struct ieee80211_p2p_noa_attr noa = {};
4039                 int ret;
4040
4041                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
4042                                             len - baselen,
4043                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
4044                                             (u8 *) &noa, sizeof(noa));
4045                 if (ret >= 2) {
4046                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
4047                                 /* valid noa_attr and index changed */
4048                                 sdata->u.mgd.p2p_noa_index = noa.index;
4049                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
4050                                 changed |= BSS_CHANGED_P2P_PS;
4051                                 /*
4052                                  * make sure we update all information, the CRC
4053                                  * mechanism doesn't look at P2P attributes.
4054                                  */
4055                                 ifmgd->beacon_crc_valid = false;
4056                         }
4057                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
4058                         /* noa_attr not found and we had valid noa_attr before */
4059                         sdata->u.mgd.p2p_noa_index = -1;
4060                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
4061                         changed |= BSS_CHANGED_P2P_PS;
4062                         ifmgd->beacon_crc_valid = false;
4063                 }
4064         }
4065
4066         if (ifmgd->csa_waiting_bcn)
4067                 ieee80211_chswitch_post_beacon(sdata);
4068
4069         /*
4070          * Update beacon timing and dtim count on every beacon appearance. This
4071          * will allow the driver to use the most updated values. Do it before
4072          * comparing this one with last received beacon.
4073          * IMPORTANT: These parameters would possibly be out of sync by the time
4074          * the driver will use them. The synchronized view is currently
4075          * guaranteed only in certain callbacks.
4076          */
4077         if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4078                 sdata->vif.bss_conf.sync_tsf =
4079                         le64_to_cpu(mgmt->u.beacon.timestamp);
4080                 sdata->vif.bss_conf.sync_device_ts =
4081                         rx_status->device_timestamp;
4082                 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
4083         }
4084
4085         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
4086                 return;
4087         ifmgd->beacon_crc = ncrc;
4088         ifmgd->beacon_crc_valid = true;
4089
4090         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
4091
4092         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
4093                                          rx_status->device_timestamp,
4094                                          &elems, true);
4095
4096         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
4097             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
4098                                      elems.wmm_param_len,
4099                                      elems.mu_edca_param_set))
4100                 changed |= BSS_CHANGED_QOS;
4101
4102         /*
4103          * If we haven't had a beacon before, tell the driver about the
4104          * DTIM period (and beacon timing if desired) now.
4105          */
4106         if (!ifmgd->have_beacon) {
4107                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
4108                 bss_conf->dtim_period = elems.dtim_period ?: 1;
4109
4110                 changed |= BSS_CHANGED_BEACON_INFO;
4111                 ifmgd->have_beacon = true;
4112
4113                 mutex_lock(&local->iflist_mtx);
4114                 ieee80211_recalc_ps(local);
4115                 mutex_unlock(&local->iflist_mtx);
4116
4117                 ieee80211_recalc_ps_vif(sdata);
4118         }
4119
4120         if (elems.erp_info) {
4121                 erp_valid = true;
4122                 erp_value = elems.erp_info[0];
4123         } else {
4124                 erp_valid = false;
4125         }
4126         changed |= ieee80211_handle_bss_capability(sdata,
4127                         le16_to_cpu(mgmt->u.beacon.capab_info),
4128                         erp_valid, erp_value);
4129
4130         mutex_lock(&local->sta_mtx);
4131         sta = sta_info_get(sdata, bssid);
4132
4133         changed |= ieee80211_recalc_twt_req(sdata, sta, &elems);
4134
4135         if (ieee80211_config_bw(sdata, sta, elems.ht_cap_elem,
4136                                 elems.vht_cap_elem, elems.ht_operation,
4137                                 elems.vht_operation, elems.he_operation,
4138                                 bssid, &changed)) {
4139                 mutex_unlock(&local->sta_mtx);
4140                 sdata_info(sdata,
4141                            "failed to follow AP %pM bandwidth change, disconnect\n",
4142                            bssid);
4143                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4144                                        WLAN_REASON_DEAUTH_LEAVING,
4145                                        true, deauth_buf);
4146                 ieee80211_report_disconnect(sdata, deauth_buf,
4147                                             sizeof(deauth_buf), true,
4148                                             WLAN_REASON_DEAUTH_LEAVING);
4149                 return;
4150         }
4151
4152         if (sta && elems.opmode_notif)
4153                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
4154                                             rx_status->band);
4155         mutex_unlock(&local->sta_mtx);
4156
4157         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
4158                                                elems.country_elem,
4159                                                elems.country_elem_len,
4160                                                elems.pwr_constr_elem,
4161                                                elems.cisco_dtpc_elem);
4162
4163         ieee80211_bss_info_change_notify(sdata, changed);
4164 }
4165
4166 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
4167                                   struct sk_buff *skb)
4168 {
4169         struct ieee80211_rx_status *rx_status;
4170         struct ieee80211_mgmt *mgmt;
4171         u16 fc;
4172         struct ieee802_11_elems elems;
4173         int ies_len;
4174
4175         rx_status = (struct ieee80211_rx_status *) skb->cb;
4176         mgmt = (struct ieee80211_mgmt *) skb->data;
4177         fc = le16_to_cpu(mgmt->frame_control);
4178
4179         sdata_lock(sdata);
4180
4181         switch (fc & IEEE80211_FCTL_STYPE) {
4182         case IEEE80211_STYPE_BEACON:
4183                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
4184                 break;
4185         case IEEE80211_STYPE_PROBE_RESP:
4186                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
4187                 break;
4188         case IEEE80211_STYPE_AUTH:
4189                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
4190                 break;
4191         case IEEE80211_STYPE_DEAUTH:
4192                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
4193                 break;
4194         case IEEE80211_STYPE_DISASSOC:
4195                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
4196                 break;
4197         case IEEE80211_STYPE_ASSOC_RESP:
4198         case IEEE80211_STYPE_REASSOC_RESP:
4199                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
4200                 break;
4201         case IEEE80211_STYPE_ACTION:
4202                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
4203                         ies_len = skb->len -
4204                                   offsetof(struct ieee80211_mgmt,
4205                                            u.action.u.chan_switch.variable);
4206
4207                         if (ies_len < 0)
4208                                 break;
4209
4210                         /* CSA IE cannot be overridden, no need for BSSID */
4211                         ieee802_11_parse_elems(
4212                                 mgmt->u.action.u.chan_switch.variable,
4213                                 ies_len, true, &elems, mgmt->bssid, NULL);
4214
4215                         if (elems.parse_error)
4216                                 break;
4217
4218                         ieee80211_sta_process_chanswitch(sdata,
4219                                                  rx_status->mactime,
4220                                                  rx_status->device_timestamp,
4221                                                  &elems, false);
4222                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
4223                         ies_len = skb->len -
4224                                   offsetof(struct ieee80211_mgmt,
4225                                            u.action.u.ext_chan_switch.variable);
4226
4227                         if (ies_len < 0)
4228                                 break;
4229
4230                         /*
4231                          * extended CSA IE can't be overridden, no need for
4232                          * BSSID
4233                          */
4234                         ieee802_11_parse_elems(
4235                                 mgmt->u.action.u.ext_chan_switch.variable,
4236                                 ies_len, true, &elems, mgmt->bssid, NULL);
4237
4238                         if (elems.parse_error)
4239                                 break;
4240
4241                         /* for the handling code pretend this was also an IE */
4242                         elems.ext_chansw_ie =
4243                                 &mgmt->u.action.u.ext_chan_switch.data;
4244
4245                         ieee80211_sta_process_chanswitch(sdata,
4246                                                  rx_status->mactime,
4247                                                  rx_status->device_timestamp,
4248                                                  &elems, false);
4249                 }
4250                 break;
4251         }
4252         sdata_unlock(sdata);
4253 }
4254
4255 static void ieee80211_sta_timer(struct timer_list *t)
4256 {
4257         struct ieee80211_sub_if_data *sdata =
4258                 from_timer(sdata, t, u.mgd.timer);
4259
4260         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4261 }
4262
4263 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
4264                                           u8 *bssid, u8 reason, bool tx)
4265 {
4266         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4267
4268         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
4269                                tx, frame_buf);
4270
4271         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4272                                     reason);
4273 }
4274
4275 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
4276 {
4277         struct ieee80211_local *local = sdata->local;
4278         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4279         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
4280         u32 tx_flags = 0;
4281         u16 trans = 1;
4282         u16 status = 0;
4283         u16 prepare_tx_duration = 0;
4284
4285         sdata_assert_lock(sdata);
4286
4287         if (WARN_ON_ONCE(!auth_data))
4288                 return -EINVAL;
4289
4290         auth_data->tries++;
4291
4292         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
4293                 sdata_info(sdata, "authentication with %pM timed out\n",
4294                            auth_data->bss->bssid);
4295
4296                 /*
4297                  * Most likely AP is not in the range so remove the
4298                  * bss struct for that AP.
4299                  */
4300                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
4301
4302                 return -ETIMEDOUT;
4303         }
4304
4305         if (auth_data->algorithm == WLAN_AUTH_SAE)
4306                 prepare_tx_duration =
4307                         jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
4308
4309         drv_mgd_prepare_tx(local, sdata, prepare_tx_duration);
4310
4311         sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
4312                    auth_data->bss->bssid, auth_data->tries,
4313                    IEEE80211_AUTH_MAX_TRIES);
4314
4315         auth_data->expected_transaction = 2;
4316
4317         if (auth_data->algorithm == WLAN_AUTH_SAE) {
4318                 trans = auth_data->sae_trans;
4319                 status = auth_data->sae_status;
4320                 auth_data->expected_transaction = trans;
4321         }
4322
4323         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4324                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
4325                            IEEE80211_TX_INTFL_MLME_CONN_TX;
4326
4327         ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
4328                             auth_data->data, auth_data->data_len,
4329                             auth_data->bss->bssid,
4330                             auth_data->bss->bssid, NULL, 0, 0,
4331                             tx_flags);
4332
4333         if (tx_flags == 0) {
4334                 if (auth_data->algorithm == WLAN_AUTH_SAE)
4335                         auth_data->timeout = jiffies +
4336                                 IEEE80211_AUTH_TIMEOUT_SAE;
4337                 else
4338                         auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
4339         } else {
4340                 auth_data->timeout =
4341                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
4342         }
4343
4344         auth_data->timeout_started = true;
4345         run_again(sdata, auth_data->timeout);
4346
4347         return 0;
4348 }
4349
4350 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
4351 {
4352         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
4353         struct ieee80211_local *local = sdata->local;
4354
4355         sdata_assert_lock(sdata);
4356
4357         assoc_data->tries++;
4358         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
4359                 sdata_info(sdata, "association with %pM timed out\n",
4360                            assoc_data->bss->bssid);
4361
4362                 /*
4363                  * Most likely AP is not in the range so remove the
4364                  * bss struct for that AP.
4365                  */
4366                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
4367
4368                 return -ETIMEDOUT;
4369         }
4370
4371         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
4372                    assoc_data->bss->bssid, assoc_data->tries,
4373                    IEEE80211_ASSOC_MAX_TRIES);
4374         ieee80211_send_assoc(sdata);
4375
4376         if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4377                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
4378                 assoc_data->timeout_started = true;
4379                 run_again(sdata, assoc_data->timeout);
4380         } else {
4381                 assoc_data->timeout =
4382                         round_jiffies_up(jiffies +
4383                                          IEEE80211_ASSOC_TIMEOUT_LONG);
4384                 assoc_data->timeout_started = true;
4385                 run_again(sdata, assoc_data->timeout);
4386         }
4387
4388         return 0;
4389 }
4390
4391 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
4392                                   __le16 fc, bool acked)
4393 {
4394         struct ieee80211_local *local = sdata->local;
4395
4396         sdata->u.mgd.status_fc = fc;
4397         sdata->u.mgd.status_acked = acked;
4398         sdata->u.mgd.status_received = true;
4399
4400         ieee80211_queue_work(&local->hw, &sdata->work);
4401 }
4402
4403 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
4404 {
4405         struct ieee80211_local *local = sdata->local;
4406         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4407
4408         sdata_lock(sdata);
4409
4410         if (ifmgd->status_received) {
4411                 __le16 fc = ifmgd->status_fc;
4412                 bool status_acked = ifmgd->status_acked;
4413
4414                 ifmgd->status_received = false;
4415                 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
4416                         if (status_acked) {
4417                                 if (ifmgd->auth_data->algorithm ==
4418                                     WLAN_AUTH_SAE)
4419                                         ifmgd->auth_data->timeout =
4420                                                 jiffies +
4421                                                 IEEE80211_AUTH_TIMEOUT_SAE;
4422                                 else
4423                                         ifmgd->auth_data->timeout =
4424                                                 jiffies +
4425                                                 IEEE80211_AUTH_TIMEOUT_SHORT;
4426                                 run_again(sdata, ifmgd->auth_data->timeout);
4427                         } else {
4428                                 ifmgd->auth_data->timeout = jiffies - 1;
4429                         }
4430                         ifmgd->auth_data->timeout_started = true;
4431                 } else if (ifmgd->assoc_data &&
4432                            (ieee80211_is_assoc_req(fc) ||
4433                             ieee80211_is_reassoc_req(fc))) {
4434                         if (status_acked) {
4435                                 ifmgd->assoc_data->timeout =
4436                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
4437                                 run_again(sdata, ifmgd->assoc_data->timeout);
4438                         } else {
4439                                 ifmgd->assoc_data->timeout = jiffies - 1;
4440                         }
4441                         ifmgd->assoc_data->timeout_started = true;
4442                 }
4443         }
4444
4445         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
4446             time_after(jiffies, ifmgd->auth_data->timeout)) {
4447                 if (ifmgd->auth_data->done) {
4448                         /*
4449                          * ok ... we waited for assoc but userspace didn't,
4450                          * so let's just kill the auth data
4451                          */
4452                         ieee80211_destroy_auth_data(sdata, false);
4453                 } else if (ieee80211_auth(sdata)) {
4454                         u8 bssid[ETH_ALEN];
4455                         struct ieee80211_event event = {
4456                                 .type = MLME_EVENT,
4457                                 .u.mlme.data = AUTH_EVENT,
4458                                 .u.mlme.status = MLME_TIMEOUT,
4459                         };
4460
4461                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
4462
4463                         ieee80211_destroy_auth_data(sdata, false);
4464
4465                         cfg80211_auth_timeout(sdata->dev, bssid);
4466                         drv_event_callback(sdata->local, sdata, &event);
4467                 }
4468         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
4469                 run_again(sdata, ifmgd->auth_data->timeout);
4470
4471         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
4472             time_after(jiffies, ifmgd->assoc_data->timeout)) {
4473                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
4474                     ieee80211_do_assoc(sdata)) {
4475                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4476                         struct ieee80211_event event = {
4477                                 .type = MLME_EVENT,
4478                                 .u.mlme.data = ASSOC_EVENT,
4479                                 .u.mlme.status = MLME_TIMEOUT,
4480                         };
4481
4482                         ieee80211_destroy_assoc_data(sdata, false, false);
4483                         cfg80211_assoc_timeout(sdata->dev, bss);
4484                         drv_event_callback(sdata->local, sdata, &event);
4485                 }
4486         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
4487                 run_again(sdata, ifmgd->assoc_data->timeout);
4488
4489         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
4490             ifmgd->associated) {
4491                 u8 bssid[ETH_ALEN];
4492                 int max_tries;
4493
4494                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4495
4496                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4497                         max_tries = max_nullfunc_tries;
4498                 else
4499                         max_tries = max_probe_tries;
4500
4501                 /* ACK received for nullfunc probing frame */
4502                 if (!ifmgd->probe_send_count)
4503                         ieee80211_reset_ap_probe(sdata);
4504                 else if (ifmgd->nullfunc_failed) {
4505                         if (ifmgd->probe_send_count < max_tries) {
4506                                 mlme_dbg(sdata,
4507                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
4508                                          bssid, ifmgd->probe_send_count,
4509                                          max_tries);
4510                                 ieee80211_mgd_probe_ap_send(sdata);
4511                         } else {
4512                                 mlme_dbg(sdata,
4513                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
4514                                          bssid);
4515                                 ieee80211_sta_connection_lost(sdata, bssid,
4516                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4517                                         false);
4518                         }
4519                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
4520                         run_again(sdata, ifmgd->probe_timeout);
4521                 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4522                         mlme_dbg(sdata,
4523                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
4524                                  bssid, probe_wait_ms);
4525                         ieee80211_sta_connection_lost(sdata, bssid,
4526                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4527                 } else if (ifmgd->probe_send_count < max_tries) {
4528                         mlme_dbg(sdata,
4529                                  "No probe response from AP %pM after %dms, try %d/%i\n",
4530                                  bssid, probe_wait_ms,
4531                                  ifmgd->probe_send_count, max_tries);
4532                         ieee80211_mgd_probe_ap_send(sdata);
4533                 } else {
4534                         /*
4535                          * We actually lost the connection ... or did we?
4536                          * Let's make sure!
4537                          */
4538                         mlme_dbg(sdata,
4539                                  "No probe response from AP %pM after %dms, disconnecting.\n",
4540                                  bssid, probe_wait_ms);
4541
4542                         ieee80211_sta_connection_lost(sdata, bssid,
4543                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4544                 }
4545         }
4546
4547         sdata_unlock(sdata);
4548 }
4549
4550 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
4551 {
4552         struct ieee80211_sub_if_data *sdata =
4553                 from_timer(sdata, t, u.mgd.bcn_mon_timer);
4554         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4555
4556         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4557                 return;
4558
4559         sdata->u.mgd.connection_loss = false;
4560         ieee80211_queue_work(&sdata->local->hw,
4561                              &sdata->u.mgd.beacon_connection_loss_work);
4562 }
4563
4564 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
4565 {
4566         struct ieee80211_sub_if_data *sdata =
4567                 from_timer(sdata, t, u.mgd.conn_mon_timer);
4568         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4569         struct ieee80211_local *local = sdata->local;
4570
4571         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4572                 return;
4573
4574         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4575 }
4576
4577 static void ieee80211_sta_monitor_work(struct work_struct *work)
4578 {
4579         struct ieee80211_sub_if_data *sdata =
4580                 container_of(work, struct ieee80211_sub_if_data,
4581                              u.mgd.monitor_work);
4582
4583         ieee80211_mgd_probe_ap(sdata, false);
4584 }
4585
4586 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4587 {
4588         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4589                 __ieee80211_stop_poll(sdata);
4590
4591                 /* let's probe the connection once */
4592                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4593                         ieee80211_queue_work(&sdata->local->hw,
4594                                              &sdata->u.mgd.monitor_work);
4595         }
4596 }
4597
4598 #ifdef CONFIG_PM
4599 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4600 {
4601         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4602         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4603
4604         sdata_lock(sdata);
4605
4606         if (ifmgd->auth_data || ifmgd->assoc_data) {
4607                 const u8 *bssid = ifmgd->auth_data ?
4608                                 ifmgd->auth_data->bss->bssid :
4609                                 ifmgd->assoc_data->bss->bssid;
4610
4611                 /*
4612                  * If we are trying to authenticate / associate while suspending,
4613                  * cfg80211 won't know and won't actually abort those attempts,
4614                  * thus we need to do that ourselves.
4615                  */
4616                 ieee80211_send_deauth_disassoc(sdata, bssid, bssid,
4617                                                IEEE80211_STYPE_DEAUTH,
4618                                                WLAN_REASON_DEAUTH_LEAVING,
4619                                                false, frame_buf);
4620                 if (ifmgd->assoc_data)
4621                         ieee80211_destroy_assoc_data(sdata, false, true);
4622                 if (ifmgd->auth_data)
4623                         ieee80211_destroy_auth_data(sdata, false);
4624                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4625                                       IEEE80211_DEAUTH_FRAME_LEN);
4626         }
4627
4628         /* This is a bit of a hack - we should find a better and more generic
4629          * solution to this. Normally when suspending, cfg80211 will in fact
4630          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4631          * auth (not so important) or assoc (this is the problem) process.
4632          *
4633          * As a consequence, it can happen that we are in the process of both
4634          * associating and suspending, and receive an association response
4635          * after cfg80211 has checked if it needs to disconnect, but before
4636          * we actually set the flag to drop incoming frames. This will then
4637          * cause the workqueue flush to process the association response in
4638          * the suspend, resulting in a successful association just before it
4639          * tries to remove the interface from the driver, which now though
4640          * has a channel context assigned ... this results in issues.
4641          *
4642          * To work around this (for now) simply deauth here again if we're
4643          * now connected.
4644          */
4645         if (ifmgd->associated && !sdata->local->wowlan) {
4646                 u8 bssid[ETH_ALEN];
4647                 struct cfg80211_deauth_request req = {
4648                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4649                         .bssid = bssid,
4650                 };
4651
4652                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4653                 ieee80211_mgd_deauth(sdata, &req);
4654         }
4655
4656         sdata_unlock(sdata);
4657 }
4658
4659 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4660 {
4661         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4662
4663         sdata_lock(sdata);
4664         if (!ifmgd->associated) {
4665                 sdata_unlock(sdata);
4666                 return;
4667         }
4668
4669         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4670                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4671                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4672                 ieee80211_sta_connection_lost(sdata,
4673                                               ifmgd->associated->bssid,
4674                                               WLAN_REASON_UNSPECIFIED,
4675                                               true);
4676                 sdata_unlock(sdata);
4677                 return;
4678         }
4679         sdata_unlock(sdata);
4680 }
4681 #endif
4682
4683 /* interface setup */
4684 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4685 {
4686         struct ieee80211_if_managed *ifmgd;
4687
4688         ifmgd = &sdata->u.mgd;
4689         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4690         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4691         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4692                   ieee80211_beacon_connection_loss_work);
4693         INIT_WORK(&ifmgd->csa_connection_drop_work,
4694                   ieee80211_csa_connection_drop_work);
4695         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4696         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4697                           ieee80211_tdls_peer_del_work);
4698         timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
4699         timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
4700         timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
4701         timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
4702         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4703                           ieee80211_sta_handle_tspec_ac_params_wk);
4704
4705         ifmgd->flags = 0;
4706         ifmgd->powersave = sdata->wdev.ps;
4707         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4708         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4709         ifmgd->p2p_noa_index = -1;
4710
4711         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4712                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4713         else
4714                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4715
4716         /* Setup TDLS data */
4717         spin_lock_init(&ifmgd->teardown_lock);
4718         ifmgd->teardown_skb = NULL;
4719         ifmgd->orig_teardown_skb = NULL;
4720 }
4721
4722 /* scan finished notification */
4723 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4724 {
4725         struct ieee80211_sub_if_data *sdata;
4726
4727         /* Restart STA timers */
4728         rcu_read_lock();
4729         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4730                 if (ieee80211_sdata_running(sdata))
4731                         ieee80211_restart_sta_timer(sdata);
4732         }
4733         rcu_read_unlock();
4734 }
4735
4736 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4737                                      struct cfg80211_bss *cbss)
4738 {
4739         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4740         const u8 *ht_cap_ie, *vht_cap_ie;
4741         const struct ieee80211_ht_cap *ht_cap;
4742         const struct ieee80211_vht_cap *vht_cap;
4743         u8 chains = 1;
4744
4745         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4746                 return chains;
4747
4748         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4749         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4750                 ht_cap = (void *)(ht_cap_ie + 2);
4751                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4752                 /*
4753                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4754                  *       "Tx Unequal Modulation Supported" fields.
4755                  */
4756         }
4757
4758         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4759                 return chains;
4760
4761         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4762         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4763                 u8 nss;
4764                 u16 tx_mcs_map;
4765
4766                 vht_cap = (void *)(vht_cap_ie + 2);
4767                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4768                 for (nss = 8; nss > 0; nss--) {
4769                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4770                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4771                                 break;
4772                 }
4773                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4774                 chains = max(chains, nss);
4775         }
4776
4777         return chains;
4778 }
4779
4780 static bool
4781 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband,
4782                                     const struct ieee80211_he_operation *he_op)
4783 {
4784         const struct ieee80211_sta_he_cap *sta_he_cap =
4785                 ieee80211_get_he_sta_cap(sband);
4786         u16 ap_min_req_set;
4787         int i;
4788
4789         if (!sta_he_cap || !he_op)
4790                 return false;
4791
4792         ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4793
4794         /* Need to go over for 80MHz, 160MHz and for 80+80 */
4795         for (i = 0; i < 3; i++) {
4796                 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
4797                         &sta_he_cap->he_mcs_nss_supp;
4798                 u16 sta_mcs_map_rx =
4799                         le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
4800                 u16 sta_mcs_map_tx =
4801                         le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
4802                 u8 nss;
4803                 bool verified = true;
4804
4805                 /*
4806                  * For each band there is a maximum of 8 spatial streams
4807                  * possible. Each of the sta_mcs_map_* is a 16-bit struct built
4808                  * of 2 bits per NSS (1-8), with the values defined in enum
4809                  * ieee80211_he_mcs_support. Need to make sure STA TX and RX
4810                  * capabilities aren't less than the AP's minimum requirements
4811                  * for this HE BSS per SS.
4812                  * It is enough to find one such band that meets the reqs.
4813                  */
4814                 for (nss = 8; nss > 0; nss--) {
4815                         u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
4816                         u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
4817                         u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4818
4819                         if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4820                                 continue;
4821
4822                         /*
4823                          * Make sure the HE AP doesn't require MCSs that aren't
4824                          * supported by the client
4825                          */
4826                         if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4827                             sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4828                             (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
4829                                 verified = false;
4830                                 break;
4831                         }
4832                 }
4833
4834                 if (verified)
4835                         return true;
4836         }
4837
4838         /* If here, STA doesn't meet AP's HE min requirements */
4839         return false;
4840 }
4841
4842 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4843                                   struct cfg80211_bss *cbss)
4844 {
4845         struct ieee80211_local *local = sdata->local;
4846         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4847         const struct ieee80211_ht_cap *ht_cap = NULL;
4848         const struct ieee80211_ht_operation *ht_oper = NULL;
4849         const struct ieee80211_vht_operation *vht_oper = NULL;
4850         const struct ieee80211_he_operation *he_oper = NULL;
4851         struct ieee80211_supported_band *sband;
4852         struct cfg80211_chan_def chandef;
4853         bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
4854         struct ieee80211_bss *bss = (void *)cbss->priv;
4855         int ret;
4856         u32 i;
4857         bool have_80mhz;
4858
4859         sband = local->hw.wiphy->bands[cbss->channel->band];
4860
4861         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4862                           IEEE80211_STA_DISABLE_80P80MHZ |
4863                           IEEE80211_STA_DISABLE_160MHZ);
4864
4865         /* disable HT/VHT/HE if we don't support them */
4866         if (!sband->ht_cap.ht_supported && !is_6ghz) {
4867                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4868                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4869                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4870         }
4871
4872         if (!sband->vht_cap.vht_supported && !is_6ghz) {
4873                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4874                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4875         }
4876
4877         if (!ieee80211_get_he_sta_cap(sband))
4878                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4879
4880         rcu_read_lock();
4881
4882         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) {
4883                 const u8 *ht_oper_ie, *ht_cap_ie;
4884
4885                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4886                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4887                         ht_oper = (void *)(ht_oper_ie + 2);
4888
4889                 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4890                 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4891                         ht_cap = (void *)(ht_cap_ie + 2);
4892
4893                 if (!ht_cap) {
4894                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4895                         ht_oper = NULL;
4896                 }
4897         }
4898
4899         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && !is_6ghz) {
4900                 const u8 *vht_oper_ie, *vht_cap;
4901
4902                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4903                                                    WLAN_EID_VHT_OPERATION);
4904                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4905                         vht_oper = (void *)(vht_oper_ie + 2);
4906                 if (vht_oper && !ht_oper) {
4907                         vht_oper = NULL;
4908                         sdata_info(sdata,
4909                                    "AP advertised VHT without HT, disabling HT/VHT/HE\n");
4910                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4911                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4912                         ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4913                 }
4914
4915                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4916                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4917                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4918                         vht_oper = NULL;
4919                 }
4920         }
4921
4922         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) {
4923                 const struct cfg80211_bss_ies *ies;
4924                 const u8 *he_oper_ie;
4925
4926                 ies = rcu_dereference(cbss->ies);
4927                 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION,
4928                                                   ies->data, ies->len);
4929                 if (he_oper_ie &&
4930                     he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3]))
4931                         he_oper = (void *)(he_oper_ie + 3);
4932                 else
4933                         he_oper = NULL;
4934
4935                 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper))
4936                         ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4937         }
4938
4939         /* Allow VHT if at least one channel on the sband supports 80 MHz */
4940         have_80mhz = false;
4941         for (i = 0; i < sband->n_channels; i++) {
4942                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4943                                                 IEEE80211_CHAN_NO_80MHZ))
4944                         continue;
4945
4946                 have_80mhz = true;
4947                 break;
4948         }
4949
4950         if (!have_80mhz)
4951                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4952
4953         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4954                                                      cbss->channel,
4955                                                      bss->vht_cap_info,
4956                                                      ht_oper, vht_oper, he_oper,
4957                                                      &chandef, false);
4958
4959         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4960                                       local->rx_chains);
4961
4962         rcu_read_unlock();
4963
4964         if (ifmgd->flags & IEEE80211_STA_DISABLE_HE && is_6ghz) {
4965                 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection");
4966                 return -EINVAL;
4967         }
4968
4969         /* will change later if needed */
4970         sdata->smps_mode = IEEE80211_SMPS_OFF;
4971
4972         mutex_lock(&local->mtx);
4973         /*
4974          * If this fails (possibly due to channel context sharing
4975          * on incompatible channels, e.g. 80+80 and 160 sharing the
4976          * same control channel) try to use a smaller bandwidth.
4977          */
4978         ret = ieee80211_vif_use_channel(sdata, &chandef,
4979                                         IEEE80211_CHANCTX_SHARED);
4980
4981         /* don't downgrade for 5 and 10 MHz channels, though. */
4982         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4983             chandef.width == NL80211_CHAN_WIDTH_10)
4984                 goto out;
4985
4986         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4987                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4988                 ret = ieee80211_vif_use_channel(sdata, &chandef,
4989                                                 IEEE80211_CHANCTX_SHARED);
4990         }
4991  out:
4992         mutex_unlock(&local->mtx);
4993         return ret;
4994 }
4995
4996 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies,
4997                                u8 *dtim_count, u8 *dtim_period)
4998 {
4999         const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len);
5000         const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data,
5001                                          ies->len);
5002         const struct ieee80211_tim_ie *tim = NULL;
5003         const struct ieee80211_bssid_index *idx;
5004         bool valid = tim_ie && tim_ie[1] >= 2;
5005
5006         if (valid)
5007                 tim = (void *)(tim_ie + 2);
5008
5009         if (dtim_count)
5010                 *dtim_count = valid ? tim->dtim_count : 0;
5011
5012         if (dtim_period)
5013                 *dtim_period = valid ? tim->dtim_period : 0;
5014
5015         /* Check if value is overridden by non-transmitted profile */
5016         if (!idx_ie || idx_ie[1] < 3)
5017                 return valid;
5018
5019         idx = (void *)(idx_ie + 2);
5020
5021         if (dtim_count)
5022                 *dtim_count = idx->dtim_count;
5023
5024         if (dtim_period)
5025                 *dtim_period = idx->dtim_period;
5026
5027         return true;
5028 }
5029
5030 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
5031                                      struct cfg80211_bss *cbss, bool assoc,
5032                                      bool override)
5033 {
5034         struct ieee80211_local *local = sdata->local;
5035         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5036         struct ieee80211_bss *bss = (void *)cbss->priv;
5037         struct sta_info *new_sta = NULL;
5038         struct ieee80211_supported_band *sband;
5039         bool have_sta = false;
5040         int err;
5041
5042         sband = local->hw.wiphy->bands[cbss->channel->band];
5043
5044         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
5045                 return -EINVAL;
5046
5047         /* If a reconfig is happening, bail out */
5048         if (local->in_reconfig)
5049                 return -EBUSY;
5050
5051         if (assoc) {
5052                 rcu_read_lock();
5053                 have_sta = sta_info_get(sdata, cbss->bssid);
5054                 rcu_read_unlock();
5055         }
5056
5057         if (!have_sta) {
5058                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
5059                 if (!new_sta)
5060                         return -ENOMEM;
5061         }
5062
5063         /*
5064          * Set up the information for the new channel before setting the
5065          * new channel. We can't - completely race-free - change the basic
5066          * rates bitmap and the channel (sband) that it refers to, but if
5067          * we set it up before we at least avoid calling into the driver's
5068          * bss_info_changed() method with invalid information (since we do
5069          * call that from changing the channel - only for IDLE and perhaps
5070          * some others, but ...).
5071          *
5072          * So to avoid that, just set up all the new information before the
5073          * channel, but tell the driver to apply it only afterwards, since
5074          * it might need the new channel for that.
5075          */
5076         if (new_sta) {
5077                 u32 rates = 0, basic_rates = 0;
5078                 bool have_higher_than_11mbit;
5079                 int min_rate = INT_MAX, min_rate_index = -1;
5080                 const struct cfg80211_bss_ies *ies;
5081                 int shift = ieee80211_vif_get_shift(&sdata->vif);
5082
5083                 ieee80211_get_rates(sband, bss->supp_rates,
5084                                     bss->supp_rates_len,
5085                                     &rates, &basic_rates,
5086                                     &have_higher_than_11mbit,
5087                                     &min_rate, &min_rate_index,
5088                                     shift);
5089
5090                 /*
5091                  * This used to be a workaround for basic rates missing
5092                  * in the association response frame. Now that we no
5093                  * longer use the basic rates from there, it probably
5094                  * doesn't happen any more, but keep the workaround so
5095                  * in case some *other* APs are buggy in different ways
5096                  * we can connect -- with a warning.
5097                  * Allow this workaround only in case the AP provided at least
5098                  * one rate.
5099                  */
5100                 if (min_rate_index < 0) {
5101                         sdata_info(sdata,
5102                                    "No legacy rates in association response\n");
5103
5104                         sta_info_free(local, new_sta);
5105                         return -EINVAL;
5106                 } else if (!basic_rates) {
5107                         sdata_info(sdata,
5108                                    "No basic rates, using min rate instead\n");
5109                         basic_rates = BIT(min_rate_index);
5110                 }
5111
5112                 if (rates)
5113                         new_sta->sta.supp_rates[cbss->channel->band] = rates;
5114                 else
5115                         sdata_info(sdata,
5116                                    "No rates found, keeping mandatory only\n");
5117
5118                 sdata->vif.bss_conf.basic_rates = basic_rates;
5119
5120                 /* cf. IEEE 802.11 9.2.12 */
5121                 if (cbss->channel->band == NL80211_BAND_2GHZ &&
5122                     have_higher_than_11mbit)
5123                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
5124                 else
5125                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
5126
5127                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
5128
5129                 /* set timing information */
5130                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
5131                 rcu_read_lock();
5132                 ies = rcu_dereference(cbss->beacon_ies);
5133                 if (ies) {
5134                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
5135                         sdata->vif.bss_conf.sync_device_ts =
5136                                 bss->device_ts_beacon;
5137
5138                         ieee80211_get_dtim(ies,
5139                                            &sdata->vif.bss_conf.sync_dtim_count,
5140                                            NULL);
5141                 } else if (!ieee80211_hw_check(&sdata->local->hw,
5142                                                TIMING_BEACON_ONLY)) {
5143                         ies = rcu_dereference(cbss->proberesp_ies);
5144                         /* must be non-NULL since beacon IEs were NULL */
5145                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
5146                         sdata->vif.bss_conf.sync_device_ts =
5147                                 bss->device_ts_presp;
5148                         sdata->vif.bss_conf.sync_dtim_count = 0;
5149                 } else {
5150                         sdata->vif.bss_conf.sync_tsf = 0;
5151                         sdata->vif.bss_conf.sync_device_ts = 0;
5152                         sdata->vif.bss_conf.sync_dtim_count = 0;
5153                 }
5154                 rcu_read_unlock();
5155         }
5156
5157         if (new_sta || override) {
5158                 err = ieee80211_prep_channel(sdata, cbss);
5159                 if (err) {
5160                         if (new_sta)
5161                                 sta_info_free(local, new_sta);
5162                         return -EINVAL;
5163                 }
5164         }
5165
5166         if (new_sta) {
5167                 /*
5168                  * tell driver about BSSID, basic rates and timing
5169                  * this was set up above, before setting the channel
5170                  */
5171                 ieee80211_bss_info_change_notify(sdata,
5172                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
5173                         BSS_CHANGED_BEACON_INT);
5174
5175                 if (assoc)
5176                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
5177
5178                 err = sta_info_insert(new_sta);
5179                 new_sta = NULL;
5180                 if (err) {
5181                         sdata_info(sdata,
5182                                    "failed to insert STA entry for the AP (error %d)\n",
5183                                    err);
5184                         return err;
5185                 }
5186         } else
5187                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
5188
5189         /* Cancel scan to ensure that nothing interferes with connection */
5190         if (local->scanning)
5191                 ieee80211_scan_cancel(local);
5192
5193         return 0;
5194 }
5195
5196 /* config hooks */
5197 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
5198                        struct cfg80211_auth_request *req)
5199 {
5200         struct ieee80211_local *local = sdata->local;
5201         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5202         struct ieee80211_mgd_auth_data *auth_data;
5203         u16 auth_alg;
5204         int err;
5205         bool cont_auth;
5206
5207         /* prepare auth data structure */
5208
5209         switch (req->auth_type) {
5210         case NL80211_AUTHTYPE_OPEN_SYSTEM:
5211                 auth_alg = WLAN_AUTH_OPEN;
5212                 break;
5213         case NL80211_AUTHTYPE_SHARED_KEY:
5214                 if (fips_enabled)
5215                         return -EOPNOTSUPP;
5216                 auth_alg = WLAN_AUTH_SHARED_KEY;
5217                 break;
5218         case NL80211_AUTHTYPE_FT:
5219                 auth_alg = WLAN_AUTH_FT;
5220                 break;
5221         case NL80211_AUTHTYPE_NETWORK_EAP:
5222                 auth_alg = WLAN_AUTH_LEAP;
5223                 break;
5224         case NL80211_AUTHTYPE_SAE:
5225                 auth_alg = WLAN_AUTH_SAE;
5226                 break;
5227         case NL80211_AUTHTYPE_FILS_SK:
5228                 auth_alg = WLAN_AUTH_FILS_SK;
5229                 break;
5230         case NL80211_AUTHTYPE_FILS_SK_PFS:
5231                 auth_alg = WLAN_AUTH_FILS_SK_PFS;
5232                 break;
5233         case NL80211_AUTHTYPE_FILS_PK:
5234                 auth_alg = WLAN_AUTH_FILS_PK;
5235                 break;
5236         default:
5237                 return -EOPNOTSUPP;
5238         }
5239
5240         if (ifmgd->assoc_data)
5241                 return -EBUSY;
5242
5243         auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
5244                             req->ie_len, GFP_KERNEL);
5245         if (!auth_data)
5246                 return -ENOMEM;
5247
5248         auth_data->bss = req->bss;
5249
5250         if (req->auth_data_len >= 4) {
5251                 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
5252                         __le16 *pos = (__le16 *) req->auth_data;
5253
5254                         auth_data->sae_trans = le16_to_cpu(pos[0]);
5255                         auth_data->sae_status = le16_to_cpu(pos[1]);
5256                 }
5257                 memcpy(auth_data->data, req->auth_data + 4,
5258                        req->auth_data_len - 4);
5259                 auth_data->data_len += req->auth_data_len - 4;
5260         }
5261
5262         /* Check if continuing authentication or trying to authenticate with the
5263          * same BSS that we were in the process of authenticating with and avoid
5264          * removal and re-addition of the STA entry in
5265          * ieee80211_prep_connection().
5266          */
5267         cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss;
5268
5269         if (req->ie && req->ie_len) {
5270                 memcpy(&auth_data->data[auth_data->data_len],
5271                        req->ie, req->ie_len);
5272                 auth_data->data_len += req->ie_len;
5273         }
5274
5275         if (req->key && req->key_len) {
5276                 auth_data->key_len = req->key_len;
5277                 auth_data->key_idx = req->key_idx;
5278                 memcpy(auth_data->key, req->key, req->key_len);
5279         }
5280
5281         auth_data->algorithm = auth_alg;
5282
5283         /* try to authenticate/probe */
5284
5285         if (ifmgd->auth_data) {
5286                 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
5287                         auth_data->peer_confirmed =
5288                                 ifmgd->auth_data->peer_confirmed;
5289                 }
5290                 ieee80211_destroy_auth_data(sdata, cont_auth);
5291         }
5292
5293         /* prep auth_data so we don't go into idle on disassoc */
5294         ifmgd->auth_data = auth_data;
5295
5296         /* If this is continuation of an ongoing SAE authentication exchange
5297          * (i.e., request to send SAE Confirm) and the peer has already
5298          * confirmed, mark authentication completed since we are about to send
5299          * out SAE Confirm.
5300          */
5301         if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
5302             auth_data->peer_confirmed && auth_data->sae_trans == 2)
5303                 ieee80211_mark_sta_auth(sdata, req->bss->bssid);
5304
5305         if (ifmgd->associated) {
5306                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5307
5308                 sdata_info(sdata,
5309                            "disconnect from AP %pM for new auth to %pM\n",
5310                            ifmgd->associated->bssid, req->bss->bssid);
5311                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5312                                        WLAN_REASON_UNSPECIFIED,
5313                                        false, frame_buf);
5314
5315                 ieee80211_report_disconnect(sdata, frame_buf,
5316                                             sizeof(frame_buf), true,
5317                                             WLAN_REASON_UNSPECIFIED);
5318         }
5319
5320         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
5321
5322         err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false);
5323         if (err)
5324                 goto err_clear;
5325
5326         err = ieee80211_auth(sdata);
5327         if (err) {
5328                 sta_info_destroy_addr(sdata, req->bss->bssid);
5329                 goto err_clear;
5330         }
5331
5332         /* hold our own reference */
5333         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
5334         return 0;
5335
5336  err_clear:
5337         eth_zero_addr(ifmgd->bssid);
5338         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5339         ifmgd->auth_data = NULL;
5340         mutex_lock(&sdata->local->mtx);
5341         ieee80211_vif_release_channel(sdata);
5342         mutex_unlock(&sdata->local->mtx);
5343         kfree(auth_data);
5344         return err;
5345 }
5346
5347 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
5348                         struct cfg80211_assoc_request *req)
5349 {
5350         bool is_6ghz = req->bss->channel->band == NL80211_BAND_6GHZ;
5351         struct ieee80211_local *local = sdata->local;
5352         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5353         struct ieee80211_bss *bss = (void *)req->bss->priv;
5354         struct ieee80211_mgd_assoc_data *assoc_data;
5355         const struct cfg80211_bss_ies *beacon_ies;
5356         struct ieee80211_supported_band *sband;
5357         const u8 *ssidie, *ht_ie, *vht_ie;
5358         int i, err;
5359         bool override = false;
5360
5361         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
5362         if (!assoc_data)
5363                 return -ENOMEM;
5364
5365         rcu_read_lock();
5366         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
5367         if (!ssidie || ssidie[1] > sizeof(assoc_data->ssid)) {
5368                 rcu_read_unlock();
5369                 kfree(assoc_data);
5370                 return -EINVAL;
5371         }
5372         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
5373         assoc_data->ssid_len = ssidie[1];
5374         rcu_read_unlock();
5375
5376         if (ifmgd->associated) {
5377                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5378
5379                 sdata_info(sdata,
5380                            "disconnect from AP %pM for new assoc to %pM\n",
5381                            ifmgd->associated->bssid, req->bss->bssid);
5382                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5383                                        WLAN_REASON_UNSPECIFIED,
5384                                        false, frame_buf);
5385
5386                 ieee80211_report_disconnect(sdata, frame_buf,
5387                                             sizeof(frame_buf), true,
5388                                             WLAN_REASON_UNSPECIFIED);
5389         }
5390
5391         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
5392                 err = -EBUSY;
5393                 goto err_free;
5394         }
5395
5396         if (ifmgd->assoc_data) {
5397                 err = -EBUSY;
5398                 goto err_free;
5399         }
5400
5401         if (ifmgd->auth_data) {
5402                 bool match;
5403
5404                 /* keep sta info, bssid if matching */
5405                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
5406                 ieee80211_destroy_auth_data(sdata, match);
5407         }
5408
5409         /* prepare assoc data */
5410
5411         ifmgd->beacon_crc_valid = false;
5412
5413         assoc_data->wmm = bss->wmm_used &&
5414                           (local->hw.queues >= IEEE80211_NUM_ACS);
5415
5416         /*
5417          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
5418          * We still associate in non-HT mode (11a/b/g) if any one of these
5419          * ciphers is configured as pairwise.
5420          * We can set this to true for non-11n hardware, that'll be checked
5421          * separately along with the peer capabilities.
5422          */
5423         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
5424                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
5425                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
5426                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5427                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5428                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5429                         ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5430                         netdev_info(sdata->dev,
5431                                     "disabling HT/VHT/HE due to WEP/TKIP use\n");
5432                 }
5433         }
5434
5435         sband = local->hw.wiphy->bands[req->bss->channel->band];
5436
5437         /* also disable HT/VHT/HE if the AP doesn't use WMM */
5438         if (!bss->wmm_used) {
5439                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5440                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5441                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5442                 netdev_info(sdata->dev,
5443                             "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n");
5444         }
5445
5446         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
5447         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
5448                sizeof(ifmgd->ht_capa_mask));
5449
5450         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
5451         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
5452                sizeof(ifmgd->vht_capa_mask));
5453
5454         if (req->ie && req->ie_len) {
5455                 memcpy(assoc_data->ie, req->ie, req->ie_len);
5456                 assoc_data->ie_len = req->ie_len;
5457         }
5458
5459         if (req->fils_kek) {
5460                 /* should already be checked in cfg80211 - so warn */
5461                 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
5462                         err = -EINVAL;
5463                         goto err_free;
5464                 }
5465                 memcpy(assoc_data->fils_kek, req->fils_kek,
5466                        req->fils_kek_len);
5467                 assoc_data->fils_kek_len = req->fils_kek_len;
5468         }
5469
5470         if (req->fils_nonces)
5471                 memcpy(assoc_data->fils_nonces, req->fils_nonces,
5472                        2 * FILS_NONCE_LEN);
5473
5474         assoc_data->bss = req->bss;
5475
5476         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
5477                 if (ifmgd->powersave)
5478                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
5479                 else
5480                         sdata->smps_mode = IEEE80211_SMPS_OFF;
5481         } else
5482                 sdata->smps_mode = ifmgd->req_smps;
5483
5484         assoc_data->capability = req->bss->capability;
5485         assoc_data->supp_rates = bss->supp_rates;
5486         assoc_data->supp_rates_len = bss->supp_rates_len;
5487
5488         rcu_read_lock();
5489         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
5490         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
5491                 assoc_data->ap_ht_param =
5492                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
5493         else if (!is_6ghz)
5494                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5495         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
5496         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
5497                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
5498                        sizeof(struct ieee80211_vht_cap));
5499         else if (!is_6ghz)
5500                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT |
5501                                 IEEE80211_STA_DISABLE_HE;
5502         rcu_read_unlock();
5503
5504         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
5505                  ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
5506              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
5507                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
5508
5509         if (bss->wmm_used && bss->uapsd_supported &&
5510             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
5511                 assoc_data->uapsd = true;
5512                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
5513         } else {
5514                 assoc_data->uapsd = false;
5515                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
5516         }
5517
5518         if (req->prev_bssid)
5519                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
5520
5521         if (req->use_mfp) {
5522                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
5523                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
5524         } else {
5525                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
5526                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
5527         }
5528
5529         if (req->flags & ASSOC_REQ_USE_RRM)
5530                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
5531         else
5532                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
5533
5534         if (req->crypto.control_port)
5535                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
5536         else
5537                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
5538
5539         sdata->control_port_protocol = req->crypto.control_port_ethertype;
5540         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
5541         sdata->control_port_over_nl80211 =
5542                                         req->crypto.control_port_over_nl80211;
5543         sdata->control_port_no_preauth = req->crypto.control_port_no_preauth;
5544         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
5545                                                         sdata->vif.type);
5546
5547         /* kick off associate process */
5548
5549         ifmgd->assoc_data = assoc_data;
5550         ifmgd->dtim_period = 0;
5551         ifmgd->have_beacon = false;
5552
5553         /* override HT/VHT configuration only if the AP and we support it */
5554         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
5555                 struct ieee80211_sta_ht_cap sta_ht_cap;
5556
5557                 if (req->flags & ASSOC_REQ_DISABLE_HT)
5558                         override = true;
5559
5560                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
5561                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
5562
5563                 /* check for 40 MHz disable override */
5564                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
5565                     sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
5566                     !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
5567                         override = true;
5568
5569                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
5570                     req->flags & ASSOC_REQ_DISABLE_VHT)
5571                         override = true;
5572         }
5573
5574         if (req->flags & ASSOC_REQ_DISABLE_HT) {
5575                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5576                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5577                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5578         }
5579
5580         if (req->flags & ASSOC_REQ_DISABLE_VHT)
5581                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5582
5583         err = ieee80211_prep_connection(sdata, req->bss, true, override);
5584         if (err)
5585                 goto err_clear;
5586
5587         rcu_read_lock();
5588         beacon_ies = rcu_dereference(req->bss->beacon_ies);
5589
5590         if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
5591             !beacon_ies) {
5592                 /*
5593                  * Wait up to one beacon interval ...
5594                  * should this be more if we miss one?
5595                  */
5596                 sdata_info(sdata, "waiting for beacon from %pM\n",
5597                            ifmgd->bssid);
5598                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
5599                 assoc_data->timeout_started = true;
5600                 assoc_data->need_beacon = true;
5601         } else if (beacon_ies) {
5602                 const struct element *elem;
5603                 u8 dtim_count = 0;
5604
5605                 ieee80211_get_dtim(beacon_ies, &dtim_count,
5606                                    &ifmgd->dtim_period);
5607
5608                 ifmgd->have_beacon = true;
5609                 assoc_data->timeout = jiffies;
5610                 assoc_data->timeout_started = true;
5611
5612                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5613                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
5614                         sdata->vif.bss_conf.sync_device_ts =
5615                                 bss->device_ts_beacon;
5616                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
5617                 }
5618
5619                 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
5620                                               beacon_ies->data, beacon_ies->len);
5621                 if (elem && elem->datalen >= 3)
5622                         sdata->vif.bss_conf.profile_periodicity = elem->data[2];
5623
5624                 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
5625                                           beacon_ies->data, beacon_ies->len);
5626                 if (elem && elem->datalen >= 11 &&
5627                     (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
5628                         sdata->vif.bss_conf.ema_ap = true;
5629         } else {
5630                 assoc_data->timeout = jiffies;
5631                 assoc_data->timeout_started = true;
5632         }
5633         rcu_read_unlock();
5634
5635         run_again(sdata, assoc_data->timeout);
5636
5637         if (bss->corrupt_data) {
5638                 char *corrupt_type = "data";
5639                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
5640                         if (bss->corrupt_data &
5641                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
5642                                 corrupt_type = "beacon and probe response";
5643                         else
5644                                 corrupt_type = "beacon";
5645                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
5646                         corrupt_type = "probe response";
5647                 sdata_info(sdata, "associating with AP with corrupt %s\n",
5648                            corrupt_type);
5649         }
5650
5651         return 0;
5652  err_clear:
5653         eth_zero_addr(ifmgd->bssid);
5654         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5655         ifmgd->assoc_data = NULL;
5656  err_free:
5657         kfree(assoc_data);
5658         return err;
5659 }
5660
5661 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
5662                          struct cfg80211_deauth_request *req)
5663 {
5664         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5665         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5666         bool tx = !req->local_state_change;
5667
5668         if (ifmgd->auth_data &&
5669             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
5670                 sdata_info(sdata,
5671                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
5672                            req->bssid, req->reason_code,
5673                            ieee80211_get_reason_code_string(req->reason_code));
5674
5675                 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5676                 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
5677                                                IEEE80211_STYPE_DEAUTH,
5678                                                req->reason_code, tx,
5679                                                frame_buf);
5680                 ieee80211_destroy_auth_data(sdata, false);
5681                 ieee80211_report_disconnect(sdata, frame_buf,
5682                                             sizeof(frame_buf), true,
5683                                             req->reason_code);
5684
5685                 return 0;
5686         }
5687
5688         if (ifmgd->assoc_data &&
5689             ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
5690                 sdata_info(sdata,
5691                            "aborting association with %pM by local choice (Reason: %u=%s)\n",
5692                            req->bssid, req->reason_code,
5693                            ieee80211_get_reason_code_string(req->reason_code));
5694
5695                 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5696                 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
5697                                                IEEE80211_STYPE_DEAUTH,
5698                                                req->reason_code, tx,
5699                                                frame_buf);
5700                 ieee80211_destroy_assoc_data(sdata, false, true);
5701                 ieee80211_report_disconnect(sdata, frame_buf,
5702                                             sizeof(frame_buf), true,
5703                                             req->reason_code);
5704                 return 0;
5705         }
5706
5707         if (ifmgd->associated &&
5708             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5709                 sdata_info(sdata,
5710                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5711                            req->bssid, req->reason_code,
5712                            ieee80211_get_reason_code_string(req->reason_code));
5713
5714                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5715                                        req->reason_code, tx, frame_buf);
5716                 ieee80211_report_disconnect(sdata, frame_buf,
5717                                             sizeof(frame_buf), true,
5718                                             req->reason_code);
5719                 return 0;
5720         }
5721
5722         return -ENOTCONN;
5723 }
5724
5725 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5726                            struct cfg80211_disassoc_request *req)
5727 {
5728         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5729         u8 bssid[ETH_ALEN];
5730         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5731
5732         /*
5733          * cfg80211 should catch this ... but it's racy since
5734          * we can receive a disassoc frame, process it, hand it
5735          * to cfg80211 while that's in a locked section already
5736          * trying to tell us that the user wants to disconnect.
5737          */
5738         if (ifmgd->associated != req->bss)
5739                 return -ENOLINK;
5740
5741         sdata_info(sdata,
5742                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
5743                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5744
5745         memcpy(bssid, req->bss->bssid, ETH_ALEN);
5746         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5747                                req->reason_code, !req->local_state_change,
5748                                frame_buf);
5749
5750         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5751                                     req->reason_code);
5752
5753         return 0;
5754 }
5755
5756 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5757 {
5758         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5759
5760         /*
5761          * Make sure some work items will not run after this,
5762          * they will not do anything but might not have been
5763          * cancelled when disconnecting.
5764          */
5765         cancel_work_sync(&ifmgd->monitor_work);
5766         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5767         cancel_work_sync(&ifmgd->request_smps_work);
5768         cancel_work_sync(&ifmgd->csa_connection_drop_work);
5769         cancel_work_sync(&ifmgd->chswitch_work);
5770         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5771
5772         sdata_lock(sdata);
5773         if (ifmgd->assoc_data) {
5774                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5775                 ieee80211_destroy_assoc_data(sdata, false, false);
5776                 cfg80211_assoc_timeout(sdata->dev, bss);
5777         }
5778         if (ifmgd->auth_data)
5779                 ieee80211_destroy_auth_data(sdata, false);
5780         spin_lock_bh(&ifmgd->teardown_lock);
5781         if (ifmgd->teardown_skb) {
5782                 kfree_skb(ifmgd->teardown_skb);
5783                 ifmgd->teardown_skb = NULL;
5784                 ifmgd->orig_teardown_skb = NULL;
5785         }
5786         kfree(ifmgd->assoc_req_ies);
5787         ifmgd->assoc_req_ies = NULL;
5788         ifmgd->assoc_req_ies_len = 0;
5789         spin_unlock_bh(&ifmgd->teardown_lock);
5790         del_timer_sync(&ifmgd->timer);
5791         sdata_unlock(sdata);
5792 }
5793
5794 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5795                                enum nl80211_cqm_rssi_threshold_event rssi_event,
5796                                s32 rssi_level,
5797                                gfp_t gfp)
5798 {
5799         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5800
5801         trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5802
5803         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5804 }
5805 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5806
5807 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5808 {
5809         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5810
5811         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5812
5813         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5814 }
5815 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);