Merge branch 'mlx5-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mellanox...
[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                              const struct ieee80211_ht_operation *ht_oper,
149                              const struct ieee80211_vht_operation *vht_oper,
150                              const struct ieee80211_he_operation *he_oper,
151                              struct cfg80211_chan_def *chandef, bool tracking)
152 {
153         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
154         struct cfg80211_chan_def vht_chandef;
155         struct ieee80211_sta_ht_cap sta_ht_cap;
156         u32 ht_cfreq, ret;
157
158         memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
159         ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
160
161         memset(chandef, 0, sizeof(struct cfg80211_chan_def));
162         chandef->chan = channel;
163         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
164         chandef->center_freq1 = channel->center_freq;
165
166         if (!ht_oper || !sta_ht_cap.ht_supported) {
167                 ret = IEEE80211_STA_DISABLE_HT |
168                       IEEE80211_STA_DISABLE_VHT |
169                       IEEE80211_STA_DISABLE_HE;
170                 goto out;
171         }
172
173         chandef->width = NL80211_CHAN_WIDTH_20;
174
175         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
176                                                   channel->band);
177         /* check that channel matches the right operating channel */
178         if (!tracking && channel->center_freq != ht_cfreq) {
179                 /*
180                  * It's possible that some APs are confused here;
181                  * Netgear WNDR3700 sometimes reports 4 higher than
182                  * the actual channel in association responses, but
183                  * since we look at probe response/beacon data here
184                  * it should be OK.
185                  */
186                 sdata_info(sdata,
187                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
188                            channel->center_freq, ht_cfreq,
189                            ht_oper->primary_chan, channel->band);
190                 ret = IEEE80211_STA_DISABLE_HT |
191                       IEEE80211_STA_DISABLE_VHT |
192                       IEEE80211_STA_DISABLE_HE;
193                 goto out;
194         }
195
196         /* check 40 MHz support, if we have it */
197         if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
198                 ieee80211_chandef_ht_oper(ht_oper, chandef);
199         } else {
200                 /* 40 MHz (and 80 MHz) must be supported for VHT */
201                 ret = IEEE80211_STA_DISABLE_VHT;
202                 /* also mark 40 MHz disabled */
203                 ret |= IEEE80211_STA_DISABLE_40MHZ;
204                 goto out;
205         }
206
207         if (!vht_oper || !sband->vht_cap.vht_supported) {
208                 ret = IEEE80211_STA_DISABLE_VHT;
209                 goto out;
210         }
211
212         vht_chandef = *chandef;
213         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper &&
214             (le32_to_cpu(he_oper->he_oper_params) &
215              IEEE80211_HE_OPERATION_VHT_OPER_INFO)) {
216                 struct ieee80211_vht_operation he_oper_vht_cap;
217
218                 /*
219                  * Set only first 3 bytes (other 2 aren't used in
220                  * ieee80211_chandef_vht_oper() anyway)
221                  */
222                 memcpy(&he_oper_vht_cap, he_oper->optional, 3);
223                 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0);
224
225                 if (!ieee80211_chandef_vht_oper(&sdata->local->hw,
226                                                 &he_oper_vht_cap, ht_oper,
227                                                 &vht_chandef)) {
228                         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
229                                 sdata_info(sdata,
230                                            "HE AP VHT information is invalid, disable HE\n");
231                         ret = IEEE80211_STA_DISABLE_HE;
232                         goto out;
233                 }
234         } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_oper,
235                                                ht_oper, &vht_chandef)) {
236                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
237                         sdata_info(sdata,
238                                    "AP VHT information is invalid, disable VHT\n");
239                 ret = IEEE80211_STA_DISABLE_VHT;
240                 goto out;
241         }
242
243         if (!cfg80211_chandef_valid(&vht_chandef)) {
244                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
245                         sdata_info(sdata,
246                                    "AP VHT information is invalid, disable VHT\n");
247                 ret = IEEE80211_STA_DISABLE_VHT;
248                 goto out;
249         }
250
251         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
252                 ret = 0;
253                 goto out;
254         }
255
256         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
257                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
258                         sdata_info(sdata,
259                                    "AP VHT information doesn't match HT, disable VHT\n");
260                 ret = IEEE80211_STA_DISABLE_VHT;
261                 goto out;
262         }
263
264         *chandef = vht_chandef;
265
266         ret = 0;
267
268 out:
269         /*
270          * When tracking the current AP, don't do any further checks if the
271          * new chandef is identical to the one we're currently using for the
272          * connection. This keeps us from playing ping-pong with regulatory,
273          * without it the following can happen (for example):
274          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
275          *  - AP advertises regdom US
276          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
277          *  - the code below detects an unsupported channel, downgrades, and
278          *    we disconnect from the AP in the caller
279          *  - disconnect causes CRDA to reload world regdomain and the game
280          *    starts anew.
281          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
282          *
283          * It seems possible that there are still scenarios with CSA or real
284          * bandwidth changes where a this could happen, but those cases are
285          * less common and wouldn't completely prevent using the AP.
286          */
287         if (tracking &&
288             cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
289                 return ret;
290
291         /* don't print the message below for VHT mismatch if VHT is disabled */
292         if (ret & IEEE80211_STA_DISABLE_VHT)
293                 vht_chandef = *chandef;
294
295         /*
296          * Ignore the DISABLED flag when we're already connected and only
297          * tracking the APs beacon for bandwidth changes - otherwise we
298          * might get disconnected here if we connect to an AP, update our
299          * regulatory information based on the AP's country IE and the
300          * information we have is wrong/outdated and disables the channel
301          * that we're actually using for the connection to the AP.
302          */
303         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
304                                         tracking ? 0 :
305                                                    IEEE80211_CHAN_DISABLED)) {
306                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
307                         ret = IEEE80211_STA_DISABLE_HT |
308                               IEEE80211_STA_DISABLE_VHT |
309                               IEEE80211_STA_DISABLE_HE;
310                         break;
311                 }
312
313                 ret |= ieee80211_chandef_downgrade(chandef);
314         }
315
316         if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef,
317                                                  IEEE80211_CHAN_NO_HE))
318                 ret |= IEEE80211_STA_DISABLE_HE;
319
320         if (chandef->width != vht_chandef.width && !tracking)
321                 sdata_info(sdata,
322                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
323
324         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
325         return ret;
326 }
327
328 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
329                                struct sta_info *sta,
330                                const struct ieee80211_ht_cap *ht_cap,
331                                const struct ieee80211_ht_operation *ht_oper,
332                                const struct ieee80211_vht_operation *vht_oper,
333                                const struct ieee80211_he_operation *he_oper,
334                                const u8 *bssid, u32 *changed)
335 {
336         struct ieee80211_local *local = sdata->local;
337         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
338         struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan;
339         struct ieee80211_supported_band *sband =
340                 local->hw.wiphy->bands[chan->band];
341         struct cfg80211_chan_def chandef;
342         u16 ht_opmode;
343         u32 flags;
344         enum ieee80211_sta_rx_bandwidth new_sta_bw;
345         int ret;
346
347         /* if HT was/is disabled, don't track any bandwidth changes */
348         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
349                 return 0;
350
351         /* don't check VHT if we associated as non-VHT station */
352         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
353                 vht_oper = NULL;
354
355         /* don't check HE if we associated as non-HE station */
356         if (ifmgd->flags & IEEE80211_STA_DISABLE_HE ||
357             !ieee80211_get_he_sta_cap(sband))
358                 he_oper = NULL;
359
360         if (WARN_ON_ONCE(!sta))
361                 return -EINVAL;
362
363         /*
364          * if bss configuration changed store the new one -
365          * this may be applicable even if channel is identical
366          */
367         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
368         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
369                 *changed |= BSS_CHANGED_HT;
370                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
371         }
372
373         /* calculate new channel (type) based on HT/VHT/HE operation IEs */
374         flags = ieee80211_determine_chantype(sdata, sband, chan,
375                                              ht_oper, vht_oper, he_oper,
376                                              &chandef, true);
377
378         /*
379          * Downgrade the new channel if we associated with restricted
380          * capabilities. For example, if we associated as a 20 MHz STA
381          * to a 40 MHz AP (due to regulatory, capabilities or config
382          * reasons) then switching to a 40 MHz channel now won't do us
383          * any good -- we couldn't use it with the AP.
384          */
385         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
386             chandef.width == NL80211_CHAN_WIDTH_80P80)
387                 flags |= ieee80211_chandef_downgrade(&chandef);
388         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
389             chandef.width == NL80211_CHAN_WIDTH_160)
390                 flags |= ieee80211_chandef_downgrade(&chandef);
391         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
392             chandef.width > NL80211_CHAN_WIDTH_20)
393                 flags |= ieee80211_chandef_downgrade(&chandef);
394
395         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
396                 return 0;
397
398         sdata_info(sdata,
399                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
400                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
401                    chandef.center_freq1, chandef.center_freq2);
402
403         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
404                                       IEEE80211_STA_DISABLE_VHT |
405                                       IEEE80211_STA_DISABLE_HE |
406                                       IEEE80211_STA_DISABLE_40MHZ |
407                                       IEEE80211_STA_DISABLE_80P80MHZ |
408                                       IEEE80211_STA_DISABLE_160MHZ)) ||
409             !cfg80211_chandef_valid(&chandef)) {
410                 sdata_info(sdata,
411                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
412                            ifmgd->bssid);
413                 return -EINVAL;
414         }
415
416         switch (chandef.width) {
417         case NL80211_CHAN_WIDTH_20_NOHT:
418         case NL80211_CHAN_WIDTH_20:
419                 new_sta_bw = IEEE80211_STA_RX_BW_20;
420                 break;
421         case NL80211_CHAN_WIDTH_40:
422                 new_sta_bw = IEEE80211_STA_RX_BW_40;
423                 break;
424         case NL80211_CHAN_WIDTH_80:
425                 new_sta_bw = IEEE80211_STA_RX_BW_80;
426                 break;
427         case NL80211_CHAN_WIDTH_80P80:
428         case NL80211_CHAN_WIDTH_160:
429                 new_sta_bw = IEEE80211_STA_RX_BW_160;
430                 break;
431         default:
432                 return -EINVAL;
433         }
434
435         if (new_sta_bw > sta->cur_max_bandwidth)
436                 new_sta_bw = sta->cur_max_bandwidth;
437
438         if (new_sta_bw < sta->sta.bandwidth) {
439                 sta->sta.bandwidth = new_sta_bw;
440                 rate_control_rate_update(local, sband, sta,
441                                          IEEE80211_RC_BW_CHANGED);
442         }
443
444         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
445         if (ret) {
446                 sdata_info(sdata,
447                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
448                            ifmgd->bssid);
449                 return ret;
450         }
451
452         if (new_sta_bw > sta->sta.bandwidth) {
453                 sta->sta.bandwidth = new_sta_bw;
454                 rate_control_rate_update(local, sband, sta,
455                                          IEEE80211_RC_BW_CHANGED);
456         }
457
458         return 0;
459 }
460
461 /* frame sending functions */
462
463 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
464                                 struct sk_buff *skb, u8 ap_ht_param,
465                                 struct ieee80211_supported_band *sband,
466                                 struct ieee80211_channel *channel,
467                                 enum ieee80211_smps_mode smps)
468 {
469         u8 *pos;
470         u32 flags = channel->flags;
471         u16 cap;
472         struct ieee80211_sta_ht_cap ht_cap;
473
474         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
475
476         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
477         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
478
479         /* determine capability flags */
480         cap = ht_cap.cap;
481
482         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
483         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
484                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
485                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
486                         cap &= ~IEEE80211_HT_CAP_SGI_40;
487                 }
488                 break;
489         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
490                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
491                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
492                         cap &= ~IEEE80211_HT_CAP_SGI_40;
493                 }
494                 break;
495         }
496
497         /*
498          * If 40 MHz was disabled associate as though we weren't
499          * capable of 40 MHz -- some broken APs will never fall
500          * back to trying to transmit in 20 MHz.
501          */
502         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
503                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
504                 cap &= ~IEEE80211_HT_CAP_SGI_40;
505         }
506
507         /* set SM PS mode properly */
508         cap &= ~IEEE80211_HT_CAP_SM_PS;
509         switch (smps) {
510         case IEEE80211_SMPS_AUTOMATIC:
511         case IEEE80211_SMPS_NUM_MODES:
512                 WARN_ON(1);
513                 /* fall through */
514         case IEEE80211_SMPS_OFF:
515                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
516                         IEEE80211_HT_CAP_SM_PS_SHIFT;
517                 break;
518         case IEEE80211_SMPS_STATIC:
519                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
520                         IEEE80211_HT_CAP_SM_PS_SHIFT;
521                 break;
522         case IEEE80211_SMPS_DYNAMIC:
523                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
524                         IEEE80211_HT_CAP_SM_PS_SHIFT;
525                 break;
526         }
527
528         /* reserve and fill IE */
529         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
530         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
531 }
532
533 /* This function determines vht capability flags for the association
534  * and builds the IE.
535  * Note - the function may set the owner of the MU-MIMO capability
536  */
537 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
538                                  struct sk_buff *skb,
539                                  struct ieee80211_supported_band *sband,
540                                  struct ieee80211_vht_cap *ap_vht_cap)
541 {
542         struct ieee80211_local *local = sdata->local;
543         u8 *pos;
544         u32 cap;
545         struct ieee80211_sta_vht_cap vht_cap;
546         u32 mask, ap_bf_sts, our_bf_sts;
547
548         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
549
550         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
551         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
552
553         /* determine capability flags */
554         cap = vht_cap.cap;
555
556         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
557                 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
558
559                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
560                 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
561                     bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
562                         cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
563         }
564
565         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
566                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
567                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
568         }
569
570         /*
571          * Some APs apparently get confused if our capabilities are better
572          * than theirs, so restrict what we advertise in the assoc request.
573          */
574         if (!(ap_vht_cap->vht_cap_info &
575                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
576                 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
577                          IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
578         else if (!(ap_vht_cap->vht_cap_info &
579                         cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
580                 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
581
582         /*
583          * If some other vif is using the MU-MIMO capablity we cannot associate
584          * using MU-MIMO - this will lead to contradictions in the group-id
585          * mechanism.
586          * Ownership is defined since association request, in order to avoid
587          * simultaneous associations with MU-MIMO.
588          */
589         if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
590                 bool disable_mu_mimo = false;
591                 struct ieee80211_sub_if_data *other;
592
593                 list_for_each_entry_rcu(other, &local->interfaces, list) {
594                         if (other->vif.mu_mimo_owner) {
595                                 disable_mu_mimo = true;
596                                 break;
597                         }
598                 }
599                 if (disable_mu_mimo)
600                         cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
601                 else
602                         sdata->vif.mu_mimo_owner = true;
603         }
604
605         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
606
607         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
608         our_bf_sts = cap & mask;
609
610         if (ap_bf_sts < our_bf_sts) {
611                 cap &= ~mask;
612                 cap |= ap_bf_sts;
613         }
614
615         /* reserve and fill IE */
616         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
617         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
618 }
619
620 /* This function determines HE capability flags for the association
621  * and builds the IE.
622  */
623 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
624                                 struct sk_buff *skb,
625                                 struct ieee80211_supported_band *sband)
626 {
627         u8 *pos;
628         const struct ieee80211_sta_he_cap *he_cap = NULL;
629         struct ieee80211_chanctx_conf *chanctx_conf;
630         u8 he_cap_size;
631         bool reg_cap = false;
632
633         rcu_read_lock();
634         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
635         if (!WARN_ON_ONCE(!chanctx_conf))
636                 reg_cap = cfg80211_chandef_usable(sdata->wdev.wiphy,
637                                                   &chanctx_conf->def,
638                                                   IEEE80211_CHAN_NO_HE);
639
640         rcu_read_unlock();
641
642         he_cap = ieee80211_get_he_sta_cap(sband);
643         if (!he_cap || !reg_cap)
644                 return;
645
646         /*
647          * TODO: the 1 added is because this temporarily is under the EXTENSION
648          * IE. Get rid of it when it moves.
649          */
650         he_cap_size =
651                 2 + 1 + sizeof(he_cap->he_cap_elem) +
652                 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) +
653                 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
654                                       he_cap->he_cap_elem.phy_cap_info);
655         pos = skb_put(skb, he_cap_size);
656         ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size);
657 }
658
659 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
660 {
661         struct ieee80211_local *local = sdata->local;
662         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
663         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
664         struct sk_buff *skb;
665         struct ieee80211_mgmt *mgmt;
666         u8 *pos, qos_info, *ie_start;
667         size_t offset = 0, noffset;
668         int i, count, rates_len, supp_rates_len, shift;
669         u16 capab;
670         struct ieee80211_supported_band *sband;
671         struct ieee80211_chanctx_conf *chanctx_conf;
672         struct ieee80211_channel *chan;
673         u32 rates = 0;
674         struct element *ext_capa = NULL;
675
676         /* we know it's writable, cast away the const */
677         if (assoc_data->ie_len)
678                 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
679                                                       assoc_data->ie,
680                                                       assoc_data->ie_len);
681
682         sdata_assert_lock(sdata);
683
684         rcu_read_lock();
685         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
686         if (WARN_ON(!chanctx_conf)) {
687                 rcu_read_unlock();
688                 return;
689         }
690         chan = chanctx_conf->def.chan;
691         rcu_read_unlock();
692         sband = local->hw.wiphy->bands[chan->band];
693         shift = ieee80211_vif_get_shift(&sdata->vif);
694
695         if (assoc_data->supp_rates_len) {
696                 /*
697                  * Get all rates supported by the device and the AP as
698                  * some APs don't like getting a superset of their rates
699                  * in the association request (e.g. D-Link DAP 1353 in
700                  * b-only mode)...
701                  */
702                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
703                                                      assoc_data->supp_rates,
704                                                      assoc_data->supp_rates_len,
705                                                      &rates);
706         } else {
707                 /*
708                  * In case AP not provide any supported rates information
709                  * before association, we send information element(s) with
710                  * all rates that we support.
711                  */
712                 rates_len = 0;
713                 for (i = 0; i < sband->n_bitrates; i++) {
714                         rates |= BIT(i);
715                         rates_len++;
716                 }
717         }
718
719         skb = alloc_skb(local->hw.extra_tx_headroom +
720                         sizeof(*mgmt) + /* bit too much but doesn't matter */
721                         2 + assoc_data->ssid_len + /* SSID */
722                         4 + rates_len + /* (extended) rates */
723                         4 + /* power capability */
724                         2 + 2 * sband->n_channels + /* supported channels */
725                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
726                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
727                         2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */
728                                 sizeof(struct ieee80211_he_mcs_nss_supp) +
729                                 IEEE80211_HE_PPE_THRES_MAX_LEN +
730                         assoc_data->ie_len + /* extra IEs */
731                         (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
732                         9, /* WMM */
733                         GFP_KERNEL);
734         if (!skb)
735                 return;
736
737         skb_reserve(skb, local->hw.extra_tx_headroom);
738
739         capab = WLAN_CAPABILITY_ESS;
740
741         if (sband->band == NL80211_BAND_2GHZ) {
742                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
743                 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
744         }
745
746         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
747                 capab |= WLAN_CAPABILITY_PRIVACY;
748
749         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
750             ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
751                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
752
753         if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
754                 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
755
756         mgmt = skb_put_zero(skb, 24);
757         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
758         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
759         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
760
761         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
762                 skb_put(skb, 10);
763                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
764                                                   IEEE80211_STYPE_REASSOC_REQ);
765                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
766                 mgmt->u.reassoc_req.listen_interval =
767                                 cpu_to_le16(local->hw.conf.listen_interval);
768                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
769                        ETH_ALEN);
770         } else {
771                 skb_put(skb, 4);
772                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
773                                                   IEEE80211_STYPE_ASSOC_REQ);
774                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
775                 mgmt->u.assoc_req.listen_interval =
776                                 cpu_to_le16(local->hw.conf.listen_interval);
777         }
778
779         /* SSID */
780         pos = skb_put(skb, 2 + assoc_data->ssid_len);
781         ie_start = pos;
782         *pos++ = WLAN_EID_SSID;
783         *pos++ = assoc_data->ssid_len;
784         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
785
786         /* add all rates which were marked to be used above */
787         supp_rates_len = rates_len;
788         if (supp_rates_len > 8)
789                 supp_rates_len = 8;
790
791         pos = skb_put(skb, supp_rates_len + 2);
792         *pos++ = WLAN_EID_SUPP_RATES;
793         *pos++ = supp_rates_len;
794
795         count = 0;
796         for (i = 0; i < sband->n_bitrates; i++) {
797                 if (BIT(i) & rates) {
798                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
799                                                 5 * (1 << shift));
800                         *pos++ = (u8) rate;
801                         if (++count == 8)
802                                 break;
803                 }
804         }
805
806         if (rates_len > count) {
807                 pos = skb_put(skb, rates_len - count + 2);
808                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
809                 *pos++ = rates_len - count;
810
811                 for (i++; i < sband->n_bitrates; i++) {
812                         if (BIT(i) & rates) {
813                                 int rate;
814                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
815                                                     5 * (1 << shift));
816                                 *pos++ = (u8) rate;
817                         }
818                 }
819         }
820
821         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
822             capab & WLAN_CAPABILITY_RADIO_MEASURE) {
823                 pos = skb_put(skb, 4);
824                 *pos++ = WLAN_EID_PWR_CAPABILITY;
825                 *pos++ = 2;
826                 *pos++ = 0; /* min tx power */
827                  /* max tx power */
828                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
829         }
830
831         /*
832          * Per spec, we shouldn't include the list of channels if we advertise
833          * support for extended channel switching, but we've always done that;
834          * (for now?) apply this restriction only on the (new) 6 GHz band.
835          */
836         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT &&
837             (sband->band != NL80211_BAND_6GHZ ||
838              !ext_capa || ext_capa->datalen < 1 ||
839              !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) {
840                 /* TODO: get this in reg domain format */
841                 pos = skb_put(skb, 2 * sband->n_channels + 2);
842                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
843                 *pos++ = 2 * sband->n_channels;
844                 for (i = 0; i < sband->n_channels; i++) {
845                         *pos++ = ieee80211_frequency_to_channel(
846                                         sband->channels[i].center_freq);
847                         *pos++ = 1; /* one channel in the subband*/
848                 }
849         }
850
851         /* Set MBSSID support for HE AP if needed */
852         if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) &&
853             !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len &&
854             ext_capa && ext_capa->datalen >= 3)
855                 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
856
857         /* if present, add any custom IEs that go before HT */
858         if (assoc_data->ie_len) {
859                 static const u8 before_ht[] = {
860                         WLAN_EID_SSID,
861                         WLAN_EID_SUPP_RATES,
862                         WLAN_EID_EXT_SUPP_RATES,
863                         WLAN_EID_PWR_CAPABILITY,
864                         WLAN_EID_SUPPORTED_CHANNELS,
865                         WLAN_EID_RSN,
866                         WLAN_EID_QOS_CAPA,
867                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
868                         WLAN_EID_MOBILITY_DOMAIN,
869                         WLAN_EID_FAST_BSS_TRANSITION,   /* reassoc only */
870                         WLAN_EID_RIC_DATA,              /* reassoc only */
871                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
872                 };
873                 static const u8 after_ric[] = {
874                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
875                         WLAN_EID_HT_CAPABILITY,
876                         WLAN_EID_BSS_COEX_2040,
877                         /* luckily this is almost always there */
878                         WLAN_EID_EXT_CAPABILITY,
879                         WLAN_EID_QOS_TRAFFIC_CAPA,
880                         WLAN_EID_TIM_BCAST_REQ,
881                         WLAN_EID_INTERWORKING,
882                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
883                         WLAN_EID_VHT_CAPABILITY,
884                         WLAN_EID_OPMODE_NOTIF,
885                 };
886
887                 noffset = ieee80211_ie_split_ric(assoc_data->ie,
888                                                  assoc_data->ie_len,
889                                                  before_ht,
890                                                  ARRAY_SIZE(before_ht),
891                                                  after_ric,
892                                                  ARRAY_SIZE(after_ric),
893                                                  offset);
894                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
895                 offset = noffset;
896         }
897
898         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
899                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
900                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
901
902         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
903                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
904                                     sband, chan, sdata->smps_mode);
905
906         /* if present, add any custom IEs that go before VHT */
907         if (assoc_data->ie_len) {
908                 static const u8 before_vht[] = {
909                         /*
910                          * no need to list the ones split off before HT
911                          * or generated here
912                          */
913                         WLAN_EID_BSS_COEX_2040,
914                         WLAN_EID_EXT_CAPABILITY,
915                         WLAN_EID_QOS_TRAFFIC_CAPA,
916                         WLAN_EID_TIM_BCAST_REQ,
917                         WLAN_EID_INTERWORKING,
918                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
919                 };
920
921                 /* RIC already taken above, so no need to handle here anymore */
922                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
923                                              before_vht, ARRAY_SIZE(before_vht),
924                                              offset);
925                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
926                 offset = noffset;
927         }
928
929         /* if present, add any custom IEs that go before HE */
930         if (assoc_data->ie_len) {
931                 static const u8 before_he[] = {
932                         /*
933                          * no need to list the ones split off before VHT
934                          * or generated here
935                          */
936                         WLAN_EID_OPMODE_NOTIF,
937                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
938                         /* 11ai elements */
939                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
940                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
941                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
942                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
943                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
944                         /* TODO: add 11ah/11aj/11ak elements */
945                 };
946
947                 /* RIC already taken above, so no need to handle here anymore */
948                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
949                                              before_he, ARRAY_SIZE(before_he),
950                                              offset);
951                 pos = skb_put(skb, noffset - offset);
952                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
953                 offset = noffset;
954         }
955
956         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
957                 ieee80211_add_vht_ie(sdata, skb, sband,
958                                      &assoc_data->ap_vht_cap);
959
960         /*
961          * If AP doesn't support HT, mark HE as disabled.
962          * If on the 5GHz band, make sure it supports VHT.
963          */
964         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT ||
965             (sband->band == NL80211_BAND_5GHZ &&
966              ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
967                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
968
969         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
970                 ieee80211_add_he_ie(sdata, skb, sband);
971
972         /* if present, add any custom non-vendor IEs that go after HE */
973         if (assoc_data->ie_len) {
974                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
975                                                     assoc_data->ie_len,
976                                                     offset);
977                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
978                 offset = noffset;
979         }
980
981         if (assoc_data->wmm) {
982                 if (assoc_data->uapsd) {
983                         qos_info = ifmgd->uapsd_queues;
984                         qos_info |= (ifmgd->uapsd_max_sp_len <<
985                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
986                 } else {
987                         qos_info = 0;
988                 }
989
990                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
991         }
992
993         /* add any remaining custom (i.e. vendor specific here) IEs */
994         if (assoc_data->ie_len) {
995                 noffset = assoc_data->ie_len;
996                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
997         }
998
999         if (assoc_data->fils_kek_len &&
1000             fils_encrypt_assoc_req(skb, assoc_data) < 0) {
1001                 dev_kfree_skb(skb);
1002                 return;
1003         }
1004
1005         pos = skb_tail_pointer(skb);
1006         kfree(ifmgd->assoc_req_ies);
1007         ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC);
1008         ifmgd->assoc_req_ies_len = pos - ie_start;
1009
1010         drv_mgd_prepare_tx(local, sdata, 0);
1011
1012         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1013         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1014                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
1015                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
1016         ieee80211_tx_skb(sdata, skb);
1017 }
1018
1019 void ieee80211_send_pspoll(struct ieee80211_local *local,
1020                            struct ieee80211_sub_if_data *sdata)
1021 {
1022         struct ieee80211_pspoll *pspoll;
1023         struct sk_buff *skb;
1024
1025         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
1026         if (!skb)
1027                 return;
1028
1029         pspoll = (struct ieee80211_pspoll *) skb->data;
1030         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1031
1032         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1033         ieee80211_tx_skb(sdata, skb);
1034 }
1035
1036 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1037                              struct ieee80211_sub_if_data *sdata,
1038                              bool powersave)
1039 {
1040         struct sk_buff *skb;
1041         struct ieee80211_hdr_3addr *nullfunc;
1042         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1043
1044         /* Don't send NDPs when STA is connected HE */
1045         if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1046             !(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
1047                 return;
1048
1049         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
1050                 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
1051         if (!skb)
1052                 return;
1053
1054         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
1055         if (powersave)
1056                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1057
1058         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1059                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1060
1061         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1062                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
1063
1064         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1065                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1066
1067         ieee80211_tx_skb(sdata, skb);
1068 }
1069
1070 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
1071                                           struct ieee80211_sub_if_data *sdata)
1072 {
1073         struct sk_buff *skb;
1074         struct ieee80211_hdr *nullfunc;
1075         __le16 fc;
1076
1077         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1078                 return;
1079
1080         /* Don't send NDPs when connected HE */
1081         if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE))
1082                 return;
1083
1084         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1085         if (!skb)
1086                 return;
1087
1088         skb_reserve(skb, local->hw.extra_tx_headroom);
1089
1090         nullfunc = skb_put_zero(skb, 30);
1091         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
1092                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1093         nullfunc->frame_control = fc;
1094         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
1095         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1096         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
1097         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
1098
1099         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1100         ieee80211_tx_skb(sdata, skb);
1101 }
1102
1103 /* spectrum management related things */
1104 static void ieee80211_chswitch_work(struct work_struct *work)
1105 {
1106         struct ieee80211_sub_if_data *sdata =
1107                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
1108         struct ieee80211_local *local = sdata->local;
1109         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1110         int ret;
1111
1112         if (!ieee80211_sdata_running(sdata))
1113                 return;
1114
1115         sdata_lock(sdata);
1116         mutex_lock(&local->mtx);
1117         mutex_lock(&local->chanctx_mtx);
1118
1119         if (!ifmgd->associated)
1120                 goto out;
1121
1122         if (!sdata->vif.csa_active)
1123                 goto out;
1124
1125         /*
1126          * using reservation isn't immediate as it may be deferred until later
1127          * with multi-vif. once reservation is complete it will re-schedule the
1128          * work with no reserved_chanctx so verify chandef to check if it
1129          * completed successfully
1130          */
1131
1132         if (sdata->reserved_chanctx) {
1133                 struct ieee80211_supported_band *sband = NULL;
1134                 struct sta_info *mgd_sta = NULL;
1135                 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;
1136
1137                 /*
1138                  * with multi-vif csa driver may call ieee80211_csa_finish()
1139                  * many times while waiting for other interfaces to use their
1140                  * reservations
1141                  */
1142                 if (sdata->reserved_ready)
1143                         goto out;
1144
1145                 if (sdata->vif.bss_conf.chandef.width !=
1146                     sdata->csa_chandef.width) {
1147                         /*
1148                          * For managed interface, we need to also update the AP
1149                          * station bandwidth and align the rate scale algorithm
1150                          * on the bandwidth change. Here we only consider the
1151                          * bandwidth of the new channel definition (as channel
1152                          * switch flow does not have the full HT/VHT/HE
1153                          * information), assuming that if additional changes are
1154                          * required they would be done as part of the processing
1155                          * of the next beacon from the AP.
1156                          */
1157                         switch (sdata->csa_chandef.width) {
1158                         case NL80211_CHAN_WIDTH_20_NOHT:
1159                         case NL80211_CHAN_WIDTH_20:
1160                         default:
1161                                 bw = IEEE80211_STA_RX_BW_20;
1162                                 break;
1163                         case NL80211_CHAN_WIDTH_40:
1164                                 bw = IEEE80211_STA_RX_BW_40;
1165                                 break;
1166                         case NL80211_CHAN_WIDTH_80:
1167                                 bw = IEEE80211_STA_RX_BW_80;
1168                                 break;
1169                         case NL80211_CHAN_WIDTH_80P80:
1170                         case NL80211_CHAN_WIDTH_160:
1171                                 bw = IEEE80211_STA_RX_BW_160;
1172                                 break;
1173                         }
1174
1175                         mgd_sta = sta_info_get(sdata, ifmgd->bssid);
1176                         sband =
1177                                 local->hw.wiphy->bands[sdata->csa_chandef.chan->band];
1178                 }
1179
1180                 if (sdata->vif.bss_conf.chandef.width >
1181                     sdata->csa_chandef.width) {
1182                         mgd_sta->sta.bandwidth = bw;
1183                         rate_control_rate_update(local, sband, mgd_sta,
1184                                                  IEEE80211_RC_BW_CHANGED);
1185                 }
1186
1187                 ret = ieee80211_vif_use_reserved_context(sdata);
1188                 if (ret) {
1189                         sdata_info(sdata,
1190                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
1191                                    ret);
1192                         ieee80211_queue_work(&sdata->local->hw,
1193                                              &ifmgd->csa_connection_drop_work);
1194                         goto out;
1195                 }
1196
1197                 if (sdata->vif.bss_conf.chandef.width <
1198                     sdata->csa_chandef.width) {
1199                         mgd_sta->sta.bandwidth = bw;
1200                         rate_control_rate_update(local, sband, mgd_sta,
1201                                                  IEEE80211_RC_BW_CHANGED);
1202                 }
1203
1204                 goto out;
1205         }
1206
1207         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1208                                         &sdata->csa_chandef)) {
1209                 sdata_info(sdata,
1210                            "failed to finalize channel switch, disconnecting\n");
1211                 ieee80211_queue_work(&sdata->local->hw,
1212                                      &ifmgd->csa_connection_drop_work);
1213                 goto out;
1214         }
1215
1216         ifmgd->csa_waiting_bcn = true;
1217
1218         ieee80211_sta_reset_beacon_monitor(sdata);
1219         ieee80211_sta_reset_conn_monitor(sdata);
1220
1221 out:
1222         mutex_unlock(&local->chanctx_mtx);
1223         mutex_unlock(&local->mtx);
1224         sdata_unlock(sdata);
1225 }
1226
1227 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1228 {
1229         struct ieee80211_local *local = sdata->local;
1230         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1231         int ret;
1232
1233         sdata_assert_lock(sdata);
1234
1235         WARN_ON(!sdata->vif.csa_active);
1236
1237         if (sdata->csa_block_tx) {
1238                 ieee80211_wake_vif_queues(local, sdata,
1239                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1240                 sdata->csa_block_tx = false;
1241         }
1242
1243         sdata->vif.csa_active = false;
1244         ifmgd->csa_waiting_bcn = false;
1245
1246         ret = drv_post_channel_switch(sdata);
1247         if (ret) {
1248                 sdata_info(sdata,
1249                            "driver post channel switch failed, disconnecting\n");
1250                 ieee80211_queue_work(&local->hw,
1251                                      &ifmgd->csa_connection_drop_work);
1252                 return;
1253         }
1254
1255         cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1256 }
1257
1258 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1259 {
1260         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1261         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1262
1263         trace_api_chswitch_done(sdata, success);
1264         if (!success) {
1265                 sdata_info(sdata,
1266                            "driver channel switch failed, disconnecting\n");
1267                 ieee80211_queue_work(&sdata->local->hw,
1268                                      &ifmgd->csa_connection_drop_work);
1269         } else {
1270                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1271         }
1272 }
1273 EXPORT_SYMBOL(ieee80211_chswitch_done);
1274
1275 static void ieee80211_chswitch_timer(struct timer_list *t)
1276 {
1277         struct ieee80211_sub_if_data *sdata =
1278                 from_timer(sdata, t, u.mgd.chswitch_timer);
1279
1280         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1281 }
1282
1283 static void
1284 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata)
1285 {
1286         struct ieee80211_local *local = sdata->local;
1287
1288         if (!local->ops->abort_channel_switch)
1289                 return;
1290
1291         mutex_lock(&local->mtx);
1292
1293         mutex_lock(&local->chanctx_mtx);
1294         ieee80211_vif_unreserve_chanctx(sdata);
1295         mutex_unlock(&local->chanctx_mtx);
1296
1297         if (sdata->csa_block_tx)
1298                 ieee80211_wake_vif_queues(local, sdata,
1299                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1300
1301         sdata->csa_block_tx = false;
1302         sdata->vif.csa_active = false;
1303
1304         mutex_unlock(&local->mtx);
1305
1306         drv_abort_channel_switch(sdata);
1307 }
1308
1309 static void
1310 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1311                                  u64 timestamp, u32 device_timestamp,
1312                                  struct ieee802_11_elems *elems,
1313                                  bool beacon)
1314 {
1315         struct ieee80211_local *local = sdata->local;
1316         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1317         struct cfg80211_bss *cbss = ifmgd->associated;
1318         struct ieee80211_chanctx_conf *conf;
1319         struct ieee80211_chanctx *chanctx;
1320         enum nl80211_band current_band;
1321         struct ieee80211_csa_ie csa_ie;
1322         struct ieee80211_channel_switch ch_switch;
1323         int res;
1324
1325         sdata_assert_lock(sdata);
1326
1327         if (!cbss)
1328                 return;
1329
1330         if (local->scanning)
1331                 return;
1332
1333         current_band = cbss->channel->band;
1334         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1335                                            ifmgd->flags,
1336                                            ifmgd->associated->bssid, &csa_ie);
1337
1338         if (!res) {
1339                 ch_switch.timestamp = timestamp;
1340                 ch_switch.device_timestamp = device_timestamp;
1341                 ch_switch.block_tx = csa_ie.mode;
1342                 ch_switch.chandef = csa_ie.chandef;
1343                 ch_switch.count = csa_ie.count;
1344                 ch_switch.delay = csa_ie.max_switch_time;
1345         }
1346
1347         if (res < 0) {
1348                 ieee80211_queue_work(&local->hw,
1349                                      &ifmgd->csa_connection_drop_work);
1350                 return;
1351         }
1352
1353         if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) {
1354                 if (res)
1355                         ieee80211_sta_abort_chanswitch(sdata);
1356                 else
1357                         drv_channel_switch_rx_beacon(sdata, &ch_switch);
1358                 return;
1359         } else if (sdata->vif.csa_active || res) {
1360                 /* disregard subsequent announcements if already processing */
1361                 return;
1362         }
1363
1364         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1365                                      IEEE80211_CHAN_DISABLED)) {
1366                 sdata_info(sdata,
1367                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1368                            ifmgd->associated->bssid,
1369                            csa_ie.chandef.chan->center_freq,
1370                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1371                            csa_ie.chandef.center_freq2);
1372                 ieee80211_queue_work(&local->hw,
1373                                      &ifmgd->csa_connection_drop_work);
1374                 return;
1375         }
1376
1377         if (cfg80211_chandef_identical(&csa_ie.chandef,
1378                                        &sdata->vif.bss_conf.chandef) &&
1379             (!csa_ie.mode || !beacon)) {
1380                 if (ifmgd->csa_ignored_same_chan)
1381                         return;
1382                 sdata_info(sdata,
1383                            "AP %pM tries to chanswitch to same channel, ignore\n",
1384                            ifmgd->associated->bssid);
1385                 ifmgd->csa_ignored_same_chan = true;
1386                 return;
1387         }
1388
1389         /*
1390          * Drop all TDLS peers - either we disconnect or move to a different
1391          * channel from this point on. There's no telling what our peer will do.
1392          * The TDLS WIDER_BW scenario is also problematic, as peers might now
1393          * have an incompatible wider chandef.
1394          */
1395         ieee80211_teardown_tdls_peers(sdata);
1396
1397         mutex_lock(&local->mtx);
1398         mutex_lock(&local->chanctx_mtx);
1399         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1400                                          lockdep_is_held(&local->chanctx_mtx));
1401         if (!conf) {
1402                 sdata_info(sdata,
1403                            "no channel context assigned to vif?, disconnecting\n");
1404                 goto drop_connection;
1405         }
1406
1407         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1408
1409         if (local->use_chanctx &&
1410             !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1411                 sdata_info(sdata,
1412                            "driver doesn't support chan-switch with channel contexts\n");
1413                 goto drop_connection;
1414         }
1415
1416         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1417                 sdata_info(sdata,
1418                            "preparing for channel switch failed, disconnecting\n");
1419                 goto drop_connection;
1420         }
1421
1422         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1423                                             chanctx->mode, false);
1424         if (res) {
1425                 sdata_info(sdata,
1426                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1427                            res);
1428                 goto drop_connection;
1429         }
1430         mutex_unlock(&local->chanctx_mtx);
1431
1432         sdata->vif.csa_active = true;
1433         sdata->csa_chandef = csa_ie.chandef;
1434         sdata->csa_block_tx = csa_ie.mode;
1435         ifmgd->csa_ignored_same_chan = false;
1436
1437         if (sdata->csa_block_tx)
1438                 ieee80211_stop_vif_queues(local, sdata,
1439                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1440         mutex_unlock(&local->mtx);
1441
1442         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1443                                           csa_ie.count);
1444
1445         if (local->ops->channel_switch) {
1446                 /* use driver's channel switch callback */
1447                 drv_channel_switch(local, sdata, &ch_switch);
1448                 return;
1449         }
1450
1451         /* channel switch handled in software */
1452         if (csa_ie.count <= 1)
1453                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1454         else
1455                 mod_timer(&ifmgd->chswitch_timer,
1456                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1457                                          cbss->beacon_interval));
1458         return;
1459  drop_connection:
1460         /*
1461          * This is just so that the disconnect flow will know that
1462          * we were trying to switch channel and failed. In case the
1463          * mode is 1 (we are not allowed to Tx), we will know not to
1464          * send a deauthentication frame. Those two fields will be
1465          * reset when the disconnection worker runs.
1466          */
1467         sdata->vif.csa_active = true;
1468         sdata->csa_block_tx = csa_ie.mode;
1469
1470         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1471         mutex_unlock(&local->chanctx_mtx);
1472         mutex_unlock(&local->mtx);
1473 }
1474
1475 static bool
1476 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1477                                  struct ieee80211_channel *channel,
1478                                  const u8 *country_ie, u8 country_ie_len,
1479                                  const u8 *pwr_constr_elem,
1480                                  int *chan_pwr, int *pwr_reduction)
1481 {
1482         struct ieee80211_country_ie_triplet *triplet;
1483         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1484         int i, chan_increment;
1485         bool have_chan_pwr = false;
1486
1487         /* Invalid IE */
1488         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1489                 return false;
1490
1491         triplet = (void *)(country_ie + 3);
1492         country_ie_len -= 3;
1493
1494         switch (channel->band) {
1495         default:
1496                 WARN_ON_ONCE(1);
1497                 /* fall through */
1498         case NL80211_BAND_2GHZ:
1499         case NL80211_BAND_60GHZ:
1500                 chan_increment = 1;
1501                 break;
1502         case NL80211_BAND_5GHZ:
1503                 chan_increment = 4;
1504                 break;
1505         }
1506
1507         /* find channel */
1508         while (country_ie_len >= 3) {
1509                 u8 first_channel = triplet->chans.first_channel;
1510
1511                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1512                         goto next;
1513
1514                 for (i = 0; i < triplet->chans.num_channels; i++) {
1515                         if (first_channel + i * chan_increment == chan) {
1516                                 have_chan_pwr = true;
1517                                 *chan_pwr = triplet->chans.max_power;
1518                                 break;
1519                         }
1520                 }
1521                 if (have_chan_pwr)
1522                         break;
1523
1524  next:
1525                 triplet++;
1526                 country_ie_len -= 3;
1527         }
1528
1529         if (have_chan_pwr && pwr_constr_elem)
1530                 *pwr_reduction = *pwr_constr_elem;
1531         else
1532                 *pwr_reduction = 0;
1533
1534         return have_chan_pwr;
1535 }
1536
1537 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1538                                       struct ieee80211_channel *channel,
1539                                       const u8 *cisco_dtpc_ie,
1540                                       int *pwr_level)
1541 {
1542         /* From practical testing, the first data byte of the DTPC element
1543          * seems to contain the requested dBm level, and the CLI on Cisco
1544          * APs clearly state the range is -127 to 127 dBm, which indicates
1545          * a signed byte, although it seemingly never actually goes negative.
1546          * The other byte seems to always be zero.
1547          */
1548         *pwr_level = (__s8)cisco_dtpc_ie[4];
1549 }
1550
1551 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1552                                        struct ieee80211_channel *channel,
1553                                        struct ieee80211_mgmt *mgmt,
1554                                        const u8 *country_ie, u8 country_ie_len,
1555                                        const u8 *pwr_constr_ie,
1556                                        const u8 *cisco_dtpc_ie)
1557 {
1558         bool has_80211h_pwr = false, has_cisco_pwr = false;
1559         int chan_pwr = 0, pwr_reduction_80211h = 0;
1560         int pwr_level_cisco, pwr_level_80211h;
1561         int new_ap_level;
1562         __le16 capab = mgmt->u.probe_resp.capab_info;
1563
1564         if (country_ie &&
1565             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1566              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1567                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1568                         sdata, channel, country_ie, country_ie_len,
1569                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1570                 pwr_level_80211h =
1571                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1572         }
1573
1574         if (cisco_dtpc_ie) {
1575                 ieee80211_find_cisco_dtpc(
1576                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1577                 has_cisco_pwr = true;
1578         }
1579
1580         if (!has_80211h_pwr && !has_cisco_pwr)
1581                 return 0;
1582
1583         /* If we have both 802.11h and Cisco DTPC, apply both limits
1584          * by picking the smallest of the two power levels advertised.
1585          */
1586         if (has_80211h_pwr &&
1587             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1588                 new_ap_level = pwr_level_80211h;
1589
1590                 if (sdata->ap_power_level == new_ap_level)
1591                         return 0;
1592
1593                 sdata_dbg(sdata,
1594                           "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1595                           pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1596                           sdata->u.mgd.bssid);
1597         } else {  /* has_cisco_pwr is always true here. */
1598                 new_ap_level = pwr_level_cisco;
1599
1600                 if (sdata->ap_power_level == new_ap_level)
1601                         return 0;
1602
1603                 sdata_dbg(sdata,
1604                           "Limiting TX power to %d dBm as advertised by %pM\n",
1605                           pwr_level_cisco, sdata->u.mgd.bssid);
1606         }
1607
1608         sdata->ap_power_level = new_ap_level;
1609         if (__ieee80211_recalc_txpower(sdata))
1610                 return BSS_CHANGED_TXPOWER;
1611         return 0;
1612 }
1613
1614 /* powersave */
1615 static void ieee80211_enable_ps(struct ieee80211_local *local,
1616                                 struct ieee80211_sub_if_data *sdata)
1617 {
1618         struct ieee80211_conf *conf = &local->hw.conf;
1619
1620         /*
1621          * If we are scanning right now then the parameters will
1622          * take effect when scan finishes.
1623          */
1624         if (local->scanning)
1625                 return;
1626
1627         if (conf->dynamic_ps_timeout > 0 &&
1628             !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1629                 mod_timer(&local->dynamic_ps_timer, jiffies +
1630                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1631         } else {
1632                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1633                         ieee80211_send_nullfunc(local, sdata, true);
1634
1635                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1636                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1637                         return;
1638
1639                 conf->flags |= IEEE80211_CONF_PS;
1640                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1641         }
1642 }
1643
1644 static void ieee80211_change_ps(struct ieee80211_local *local)
1645 {
1646         struct ieee80211_conf *conf = &local->hw.conf;
1647
1648         if (local->ps_sdata) {
1649                 ieee80211_enable_ps(local, local->ps_sdata);
1650         } else if (conf->flags & IEEE80211_CONF_PS) {
1651                 conf->flags &= ~IEEE80211_CONF_PS;
1652                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1653                 del_timer_sync(&local->dynamic_ps_timer);
1654                 cancel_work_sync(&local->dynamic_ps_enable_work);
1655         }
1656 }
1657
1658 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1659 {
1660         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1661         struct sta_info *sta = NULL;
1662         bool authorized = false;
1663
1664         if (!mgd->powersave)
1665                 return false;
1666
1667         if (mgd->broken_ap)
1668                 return false;
1669
1670         if (!mgd->associated)
1671                 return false;
1672
1673         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1674                 return false;
1675
1676         if (!mgd->have_beacon)
1677                 return false;
1678
1679         rcu_read_lock();
1680         sta = sta_info_get(sdata, mgd->bssid);
1681         if (sta)
1682                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1683         rcu_read_unlock();
1684
1685         return authorized;
1686 }
1687
1688 /* need to hold RTNL or interface lock */
1689 void ieee80211_recalc_ps(struct ieee80211_local *local)
1690 {
1691         struct ieee80211_sub_if_data *sdata, *found = NULL;
1692         int count = 0;
1693         int timeout;
1694
1695         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1696                 local->ps_sdata = NULL;
1697                 return;
1698         }
1699
1700         list_for_each_entry(sdata, &local->interfaces, list) {
1701                 if (!ieee80211_sdata_running(sdata))
1702                         continue;
1703                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1704                         /* If an AP vif is found, then disable PS
1705                          * by setting the count to zero thereby setting
1706                          * ps_sdata to NULL.
1707                          */
1708                         count = 0;
1709                         break;
1710                 }
1711                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1712                         continue;
1713                 found = sdata;
1714                 count++;
1715         }
1716
1717         if (count == 1 && ieee80211_powersave_allowed(found)) {
1718                 u8 dtimper = found->u.mgd.dtim_period;
1719
1720                 timeout = local->dynamic_ps_forced_timeout;
1721                 if (timeout < 0)
1722                         timeout = 100;
1723                 local->hw.conf.dynamic_ps_timeout = timeout;
1724
1725                 /* If the TIM IE is invalid, pretend the value is 1 */
1726                 if (!dtimper)
1727                         dtimper = 1;
1728
1729                 local->hw.conf.ps_dtim_period = dtimper;
1730                 local->ps_sdata = found;
1731         } else {
1732                 local->ps_sdata = NULL;
1733         }
1734
1735         ieee80211_change_ps(local);
1736 }
1737
1738 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1739 {
1740         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1741
1742         if (sdata->vif.bss_conf.ps != ps_allowed) {
1743                 sdata->vif.bss_conf.ps = ps_allowed;
1744                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1745         }
1746 }
1747
1748 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1749 {
1750         struct ieee80211_local *local =
1751                 container_of(work, struct ieee80211_local,
1752                              dynamic_ps_disable_work);
1753
1754         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1755                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1756                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1757         }
1758
1759         ieee80211_wake_queues_by_reason(&local->hw,
1760                                         IEEE80211_MAX_QUEUE_MAP,
1761                                         IEEE80211_QUEUE_STOP_REASON_PS,
1762                                         false);
1763 }
1764
1765 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1766 {
1767         struct ieee80211_local *local =
1768                 container_of(work, struct ieee80211_local,
1769                              dynamic_ps_enable_work);
1770         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1771         struct ieee80211_if_managed *ifmgd;
1772         unsigned long flags;
1773         int q;
1774
1775         /* can only happen when PS was just disabled anyway */
1776         if (!sdata)
1777                 return;
1778
1779         ifmgd = &sdata->u.mgd;
1780
1781         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1782                 return;
1783
1784         if (local->hw.conf.dynamic_ps_timeout > 0) {
1785                 /* don't enter PS if TX frames are pending */
1786                 if (drv_tx_frames_pending(local)) {
1787                         mod_timer(&local->dynamic_ps_timer, jiffies +
1788                                   msecs_to_jiffies(
1789                                   local->hw.conf.dynamic_ps_timeout));
1790                         return;
1791                 }
1792
1793                 /*
1794                  * transmission can be stopped by others which leads to
1795                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1796                  * is not the actual idle state.
1797                  */
1798                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1799                 for (q = 0; q < local->hw.queues; q++) {
1800                         if (local->queue_stop_reasons[q]) {
1801                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1802                                                        flags);
1803                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1804                                           msecs_to_jiffies(
1805                                           local->hw.conf.dynamic_ps_timeout));
1806                                 return;
1807                         }
1808                 }
1809                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1810         }
1811
1812         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1813             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1814                 if (drv_tx_frames_pending(local)) {
1815                         mod_timer(&local->dynamic_ps_timer, jiffies +
1816                                   msecs_to_jiffies(
1817                                   local->hw.conf.dynamic_ps_timeout));
1818                 } else {
1819                         ieee80211_send_nullfunc(local, sdata, true);
1820                         /* Flush to get the tx status of nullfunc frame */
1821                         ieee80211_flush_queues(local, sdata, false);
1822                 }
1823         }
1824
1825         if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1826               ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1827             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1828                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1829                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1830                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1831         }
1832 }
1833
1834 void ieee80211_dynamic_ps_timer(struct timer_list *t)
1835 {
1836         struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1837
1838         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1839 }
1840
1841 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1842 {
1843         struct delayed_work *delayed_work = to_delayed_work(work);
1844         struct ieee80211_sub_if_data *sdata =
1845                 container_of(delayed_work, struct ieee80211_sub_if_data,
1846                              dfs_cac_timer_work);
1847         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1848
1849         mutex_lock(&sdata->local->mtx);
1850         if (sdata->wdev.cac_started) {
1851                 ieee80211_vif_release_channel(sdata);
1852                 cfg80211_cac_event(sdata->dev, &chandef,
1853                                    NL80211_RADAR_CAC_FINISHED,
1854                                    GFP_KERNEL);
1855         }
1856         mutex_unlock(&sdata->local->mtx);
1857 }
1858
1859 static bool
1860 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1861 {
1862         struct ieee80211_local *local = sdata->local;
1863         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1864         bool ret = false;
1865         int ac;
1866
1867         if (local->hw.queues < IEEE80211_NUM_ACS)
1868                 return false;
1869
1870         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1871                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1872                 int non_acm_ac;
1873                 unsigned long now = jiffies;
1874
1875                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1876                     tx_tspec->admitted_time &&
1877                     time_after(now, tx_tspec->time_slice_start + HZ)) {
1878                         tx_tspec->consumed_tx_time = 0;
1879                         tx_tspec->time_slice_start = now;
1880
1881                         if (tx_tspec->downgraded)
1882                                 tx_tspec->action =
1883                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
1884                 }
1885
1886                 switch (tx_tspec->action) {
1887                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1888                         /* take the original parameters */
1889                         if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1890                                 sdata_err(sdata,
1891                                           "failed to set TX queue parameters for queue %d\n",
1892                                           ac);
1893                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1894                         tx_tspec->downgraded = false;
1895                         ret = true;
1896                         break;
1897                 case TX_TSPEC_ACTION_DOWNGRADE:
1898                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1899                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1900                                 ret = true;
1901                                 break;
1902                         }
1903                         /* downgrade next lower non-ACM AC */
1904                         for (non_acm_ac = ac + 1;
1905                              non_acm_ac < IEEE80211_NUM_ACS;
1906                              non_acm_ac++)
1907                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1908                                         break;
1909                         /* Usually the loop will result in using BK even if it
1910                          * requires admission control, but such a configuration
1911                          * makes no sense and we have to transmit somehow - the
1912                          * AC selection does the same thing.
1913                          * If we started out trying to downgrade from BK, then
1914                          * the extra condition here might be needed.
1915                          */
1916                         if (non_acm_ac >= IEEE80211_NUM_ACS)
1917                                 non_acm_ac = IEEE80211_AC_BK;
1918                         if (drv_conf_tx(local, sdata, ac,
1919                                         &sdata->tx_conf[non_acm_ac]))
1920                                 sdata_err(sdata,
1921                                           "failed to set TX queue parameters for queue %d\n",
1922                                           ac);
1923                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1924                         ret = true;
1925                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
1926                                 tx_tspec->time_slice_start + HZ - now + 1);
1927                         break;
1928                 case TX_TSPEC_ACTION_NONE:
1929                         /* nothing now */
1930                         break;
1931                 }
1932         }
1933
1934         return ret;
1935 }
1936
1937 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1938 {
1939         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1940                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1941 }
1942
1943 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1944 {
1945         struct ieee80211_sub_if_data *sdata;
1946
1947         sdata = container_of(work, struct ieee80211_sub_if_data,
1948                              u.mgd.tx_tspec_wk.work);
1949         ieee80211_sta_handle_tspec_ac_params(sdata);
1950 }
1951
1952 /* MLME */
1953 static bool
1954 ieee80211_sta_wmm_params(struct ieee80211_local *local,
1955                          struct ieee80211_sub_if_data *sdata,
1956                          const u8 *wmm_param, size_t wmm_param_len,
1957                          const struct ieee80211_mu_edca_param_set *mu_edca)
1958 {
1959         struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1960         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1961         size_t left;
1962         int count, mu_edca_count, ac;
1963         const u8 *pos;
1964         u8 uapsd_queues = 0;
1965
1966         if (!local->ops->conf_tx)
1967                 return false;
1968
1969         if (local->hw.queues < IEEE80211_NUM_ACS)
1970                 return false;
1971
1972         if (!wmm_param)
1973                 return false;
1974
1975         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1976                 return false;
1977
1978         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1979                 uapsd_queues = ifmgd->uapsd_queues;
1980
1981         count = wmm_param[6] & 0x0f;
1982         /* -1 is the initial value of ifmgd->mu_edca_last_param_set.
1983          * if mu_edca was preset before and now it disappeared tell
1984          * the driver about it.
1985          */
1986         mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1;
1987         if (count == ifmgd->wmm_last_param_set &&
1988             mu_edca_count == ifmgd->mu_edca_last_param_set)
1989                 return false;
1990         ifmgd->wmm_last_param_set = count;
1991         ifmgd->mu_edca_last_param_set = mu_edca_count;
1992
1993         pos = wmm_param + 8;
1994         left = wmm_param_len - 8;
1995
1996         memset(&params, 0, sizeof(params));
1997
1998         sdata->wmm_acm = 0;
1999         for (; left >= 4; left -= 4, pos += 4) {
2000                 int aci = (pos[0] >> 5) & 0x03;
2001                 int acm = (pos[0] >> 4) & 0x01;
2002                 bool uapsd = false;
2003
2004                 switch (aci) {
2005                 case 1: /* AC_BK */
2006                         ac = IEEE80211_AC_BK;
2007                         if (acm)
2008                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
2009                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
2010                                 uapsd = true;
2011                         params[ac].mu_edca = !!mu_edca;
2012                         if (mu_edca)
2013                                 params[ac].mu_edca_param_rec = mu_edca->ac_bk;
2014                         break;
2015                 case 2: /* AC_VI */
2016                         ac = IEEE80211_AC_VI;
2017                         if (acm)
2018                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
2019                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
2020                                 uapsd = true;
2021                         params[ac].mu_edca = !!mu_edca;
2022                         if (mu_edca)
2023                                 params[ac].mu_edca_param_rec = mu_edca->ac_vi;
2024                         break;
2025                 case 3: /* AC_VO */
2026                         ac = IEEE80211_AC_VO;
2027                         if (acm)
2028                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
2029                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
2030                                 uapsd = true;
2031                         params[ac].mu_edca = !!mu_edca;
2032                         if (mu_edca)
2033                                 params[ac].mu_edca_param_rec = mu_edca->ac_vo;
2034                         break;
2035                 case 0: /* AC_BE */
2036                 default:
2037                         ac = IEEE80211_AC_BE;
2038                         if (acm)
2039                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
2040                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
2041                                 uapsd = true;
2042                         params[ac].mu_edca = !!mu_edca;
2043                         if (mu_edca)
2044                                 params[ac].mu_edca_param_rec = mu_edca->ac_be;
2045                         break;
2046                 }
2047
2048                 params[ac].aifs = pos[0] & 0x0f;
2049
2050                 if (params[ac].aifs < 2) {
2051                         sdata_info(sdata,
2052                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
2053                                    params[ac].aifs, aci);
2054                         params[ac].aifs = 2;
2055                 }
2056                 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
2057                 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
2058                 params[ac].txop = get_unaligned_le16(pos + 2);
2059                 params[ac].acm = acm;
2060                 params[ac].uapsd = uapsd;
2061
2062                 if (params[ac].cw_min == 0 ||
2063                     params[ac].cw_min > params[ac].cw_max) {
2064                         sdata_info(sdata,
2065                                    "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
2066                                    params[ac].cw_min, params[ac].cw_max, aci);
2067                         return false;
2068                 }
2069                 ieee80211_regulatory_limit_wmm_params(sdata, &params[ac], ac);
2070         }
2071
2072         /* WMM specification requires all 4 ACIs. */
2073         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2074                 if (params[ac].cw_min == 0) {
2075                         sdata_info(sdata,
2076                                    "AP has invalid WMM params (missing AC %d), using defaults\n",
2077                                    ac);
2078                         return false;
2079                 }
2080         }
2081
2082         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2083                 mlme_dbg(sdata,
2084                          "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
2085                          ac, params[ac].acm,
2086                          params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
2087                          params[ac].txop, params[ac].uapsd,
2088                          ifmgd->tx_tspec[ac].downgraded);
2089                 sdata->tx_conf[ac] = params[ac];
2090                 if (!ifmgd->tx_tspec[ac].downgraded &&
2091                     drv_conf_tx(local, sdata, ac, &params[ac]))
2092                         sdata_err(sdata,
2093                                   "failed to set TX queue parameters for AC %d\n",
2094                                   ac);
2095         }
2096
2097         /* enable WMM or activate new settings */
2098         sdata->vif.bss_conf.qos = true;
2099         return true;
2100 }
2101
2102 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2103 {
2104         lockdep_assert_held(&sdata->local->mtx);
2105
2106         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2107         ieee80211_run_deferred_scan(sdata->local);
2108 }
2109
2110 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2111 {
2112         mutex_lock(&sdata->local->mtx);
2113         __ieee80211_stop_poll(sdata);
2114         mutex_unlock(&sdata->local->mtx);
2115 }
2116
2117 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
2118                                            u16 capab, bool erp_valid, u8 erp)
2119 {
2120         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2121         struct ieee80211_supported_band *sband;
2122         u32 changed = 0;
2123         bool use_protection;
2124         bool use_short_preamble;
2125         bool use_short_slot;
2126
2127         sband = ieee80211_get_sband(sdata);
2128         if (!sband)
2129                 return changed;
2130
2131         if (erp_valid) {
2132                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
2133                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
2134         } else {
2135                 use_protection = false;
2136                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
2137         }
2138
2139         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
2140         if (sband->band == NL80211_BAND_5GHZ)
2141                 use_short_slot = true;
2142
2143         if (use_protection != bss_conf->use_cts_prot) {
2144                 bss_conf->use_cts_prot = use_protection;
2145                 changed |= BSS_CHANGED_ERP_CTS_PROT;
2146         }
2147
2148         if (use_short_preamble != bss_conf->use_short_preamble) {
2149                 bss_conf->use_short_preamble = use_short_preamble;
2150                 changed |= BSS_CHANGED_ERP_PREAMBLE;
2151         }
2152
2153         if (use_short_slot != bss_conf->use_short_slot) {
2154                 bss_conf->use_short_slot = use_short_slot;
2155                 changed |= BSS_CHANGED_ERP_SLOT;
2156         }
2157
2158         return changed;
2159 }
2160
2161 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2162                                      struct cfg80211_bss *cbss,
2163                                      u32 bss_info_changed)
2164 {
2165         struct ieee80211_bss *bss = (void *)cbss->priv;
2166         struct ieee80211_local *local = sdata->local;
2167         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2168
2169         bss_info_changed |= BSS_CHANGED_ASSOC;
2170         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
2171                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
2172
2173         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
2174                 beacon_loss_count * bss_conf->beacon_int));
2175
2176         sdata->u.mgd.associated = cbss;
2177         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2178
2179         ieee80211_check_rate_mask(sdata);
2180
2181         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
2182
2183         if (sdata->vif.p2p ||
2184             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2185                 const struct cfg80211_bss_ies *ies;
2186
2187                 rcu_read_lock();
2188                 ies = rcu_dereference(cbss->ies);
2189                 if (ies) {
2190                         int ret;
2191
2192                         ret = cfg80211_get_p2p_attr(
2193                                         ies->data, ies->len,
2194                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2195                                         (u8 *) &bss_conf->p2p_noa_attr,
2196                                         sizeof(bss_conf->p2p_noa_attr));
2197                         if (ret >= 2) {
2198                                 sdata->u.mgd.p2p_noa_index =
2199                                         bss_conf->p2p_noa_attr.index;
2200                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
2201                         }
2202                 }
2203                 rcu_read_unlock();
2204         }
2205
2206         /* just to be sure */
2207         ieee80211_stop_poll(sdata);
2208
2209         ieee80211_led_assoc(local, 1);
2210
2211         if (sdata->u.mgd.have_beacon) {
2212                 /*
2213                  * If the AP is buggy we may get here with no DTIM period
2214                  * known, so assume it's 1 which is the only safe assumption
2215                  * in that case, although if the TIM IE is broken powersave
2216                  * probably just won't work at all.
2217                  */
2218                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
2219                 bss_conf->beacon_rate = bss->beacon_rate;
2220                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2221         } else {
2222                 bss_conf->beacon_rate = NULL;
2223                 bss_conf->dtim_period = 0;
2224         }
2225
2226         bss_conf->assoc = 1;
2227
2228         /* Tell the driver to monitor connection quality (if supported) */
2229         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2230             bss_conf->cqm_rssi_thold)
2231                 bss_info_changed |= BSS_CHANGED_CQM;
2232
2233         /* Enable ARP filtering */
2234         if (bss_conf->arp_addr_cnt)
2235                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
2236
2237         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2238
2239         mutex_lock(&local->iflist_mtx);
2240         ieee80211_recalc_ps(local);
2241         mutex_unlock(&local->iflist_mtx);
2242
2243         ieee80211_recalc_smps(sdata);
2244         ieee80211_recalc_ps_vif(sdata);
2245
2246         netif_carrier_on(sdata->dev);
2247 }
2248
2249 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2250                                    u16 stype, u16 reason, bool tx,
2251                                    u8 *frame_buf)
2252 {
2253         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2254         struct ieee80211_local *local = sdata->local;
2255         u32 changed = 0;
2256
2257         sdata_assert_lock(sdata);
2258
2259         if (WARN_ON_ONCE(tx && !frame_buf))
2260                 return;
2261
2262         if (WARN_ON(!ifmgd->associated))
2263                 return;
2264
2265         ieee80211_stop_poll(sdata);
2266
2267         ifmgd->associated = NULL;
2268         netif_carrier_off(sdata->dev);
2269
2270         /*
2271          * if we want to get out of ps before disassoc (why?) we have
2272          * to do it before sending disassoc, as otherwise the null-packet
2273          * won't be valid.
2274          */
2275         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2276                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2277                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2278         }
2279         local->ps_sdata = NULL;
2280
2281         /* disable per-vif ps */
2282         ieee80211_recalc_ps_vif(sdata);
2283
2284         /* make sure ongoing transmission finishes */
2285         synchronize_net();
2286
2287         /*
2288          * drop any frame before deauth/disassoc, this can be data or
2289          * management frame. Since we are disconnecting, we should not
2290          * insist sending these frames which can take time and delay
2291          * the disconnection and possible the roaming.
2292          */
2293         if (tx)
2294                 ieee80211_flush_queues(local, sdata, true);
2295
2296         /* deauthenticate/disassociate now */
2297         if (tx || frame_buf) {
2298                 /*
2299                  * In multi channel scenarios guarantee that the virtual
2300                  * interface is granted immediate airtime to transmit the
2301                  * deauthentication frame by calling mgd_prepare_tx, if the
2302                  * driver requested so.
2303                  */
2304                 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
2305                     !ifmgd->have_beacon)
2306                         drv_mgd_prepare_tx(sdata->local, sdata, 0);
2307
2308                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid,
2309                                                ifmgd->bssid, stype, reason,
2310                                                tx, frame_buf);
2311         }
2312
2313         /* flush out frame - make sure the deauth was actually sent */
2314         if (tx)
2315                 ieee80211_flush_queues(local, sdata, false);
2316
2317         /* clear bssid only after building the needed mgmt frames */
2318         eth_zero_addr(ifmgd->bssid);
2319
2320         /* remove AP and TDLS peers */
2321         sta_info_flush(sdata);
2322
2323         /* finally reset all BSS / config parameters */
2324         changed |= ieee80211_reset_erp_info(sdata);
2325
2326         ieee80211_led_assoc(local, 0);
2327         changed |= BSS_CHANGED_ASSOC;
2328         sdata->vif.bss_conf.assoc = false;
2329
2330         ifmgd->p2p_noa_index = -1;
2331         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2332                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2333
2334         /* on the next assoc, re-program HT/VHT parameters */
2335         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2336         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2337         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2338         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2339
2340         /* reset MU-MIMO ownership and group data */
2341         memset(sdata->vif.bss_conf.mu_group.membership, 0,
2342                sizeof(sdata->vif.bss_conf.mu_group.membership));
2343         memset(sdata->vif.bss_conf.mu_group.position, 0,
2344                sizeof(sdata->vif.bss_conf.mu_group.position));
2345         changed |= BSS_CHANGED_MU_GROUPS;
2346         sdata->vif.mu_mimo_owner = false;
2347
2348         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2349
2350         del_timer_sync(&local->dynamic_ps_timer);
2351         cancel_work_sync(&local->dynamic_ps_enable_work);
2352
2353         /* Disable ARP filtering */
2354         if (sdata->vif.bss_conf.arp_addr_cnt)
2355                 changed |= BSS_CHANGED_ARP_FILTER;
2356
2357         sdata->vif.bss_conf.qos = false;
2358         changed |= BSS_CHANGED_QOS;
2359
2360         /* The BSSID (not really interesting) and HT changed */
2361         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2362         ieee80211_bss_info_change_notify(sdata, changed);
2363
2364         /* disassociated - set to defaults now */
2365         ieee80211_set_wmm_default(sdata, false, false);
2366
2367         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2368         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2369         del_timer_sync(&sdata->u.mgd.timer);
2370         del_timer_sync(&sdata->u.mgd.chswitch_timer);
2371
2372         sdata->vif.bss_conf.dtim_period = 0;
2373         sdata->vif.bss_conf.beacon_rate = NULL;
2374
2375         ifmgd->have_beacon = false;
2376
2377         ifmgd->flags = 0;
2378         mutex_lock(&local->mtx);
2379         ieee80211_vif_release_channel(sdata);
2380
2381         sdata->vif.csa_active = false;
2382         ifmgd->csa_waiting_bcn = false;
2383         ifmgd->csa_ignored_same_chan = false;
2384         if (sdata->csa_block_tx) {
2385                 ieee80211_wake_vif_queues(local, sdata,
2386                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2387                 sdata->csa_block_tx = false;
2388         }
2389         mutex_unlock(&local->mtx);
2390
2391         /* existing TX TSPEC sessions no longer exist */
2392         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2393         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2394
2395         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2396 }
2397
2398 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2399                              struct ieee80211_hdr *hdr)
2400 {
2401         /*
2402          * We can postpone the mgd.timer whenever receiving unicast frames
2403          * from AP because we know that the connection is working both ways
2404          * at that time. But multicast frames (and hence also beacons) must
2405          * be ignored here, because we need to trigger the timer during
2406          * data idle periods for sending the periodic probe request to the
2407          * AP we're connected to.
2408          */
2409         if (is_multicast_ether_addr(hdr->addr1))
2410                 return;
2411
2412         ieee80211_sta_reset_conn_monitor(sdata);
2413 }
2414
2415 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2416 {
2417         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2418         struct ieee80211_local *local = sdata->local;
2419
2420         mutex_lock(&local->mtx);
2421         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2422                 goto out;
2423
2424         __ieee80211_stop_poll(sdata);
2425
2426         mutex_lock(&local->iflist_mtx);
2427         ieee80211_recalc_ps(local);
2428         mutex_unlock(&local->iflist_mtx);
2429
2430         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2431                 goto out;
2432
2433         /*
2434          * We've received a probe response, but are not sure whether
2435          * we have or will be receiving any beacons or data, so let's
2436          * schedule the timers again, just in case.
2437          */
2438         ieee80211_sta_reset_beacon_monitor(sdata);
2439
2440         mod_timer(&ifmgd->conn_mon_timer,
2441                   round_jiffies_up(jiffies +
2442                                    IEEE80211_CONNECTION_IDLE_TIME));
2443 out:
2444         mutex_unlock(&local->mtx);
2445 }
2446
2447 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2448                                            struct ieee80211_hdr *hdr,
2449                                            u16 tx_time)
2450 {
2451         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2452         u16 tid = ieee80211_get_tid(hdr);
2453         int ac = ieee80211_ac_from_tid(tid);
2454         struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2455         unsigned long now = jiffies;
2456
2457         if (likely(!tx_tspec->admitted_time))
2458                 return;
2459
2460         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2461                 tx_tspec->consumed_tx_time = 0;
2462                 tx_tspec->time_slice_start = now;
2463
2464                 if (tx_tspec->downgraded) {
2465                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2466                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2467                 }
2468         }
2469
2470         if (tx_tspec->downgraded)
2471                 return;
2472
2473         tx_tspec->consumed_tx_time += tx_time;
2474
2475         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2476                 tx_tspec->downgraded = true;
2477                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2478                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2479         }
2480 }
2481
2482 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2483                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2484 {
2485         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2486
2487         if (!ieee80211_is_data(hdr->frame_control))
2488             return;
2489
2490         if (ieee80211_is_any_nullfunc(hdr->frame_control) &&
2491             sdata->u.mgd.probe_send_count > 0) {
2492                 if (ack)
2493                         ieee80211_sta_reset_conn_monitor(sdata);
2494                 else
2495                         sdata->u.mgd.nullfunc_failed = true;
2496                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2497                 return;
2498         }
2499
2500         if (ack)
2501                 ieee80211_sta_reset_conn_monitor(sdata);
2502 }
2503
2504 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
2505                                           const u8 *src, const u8 *dst,
2506                                           const u8 *ssid, size_t ssid_len,
2507                                           struct ieee80211_channel *channel)
2508 {
2509         struct sk_buff *skb;
2510
2511         skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
2512                                         ssid, ssid_len, NULL, 0,
2513                                         IEEE80211_PROBE_FLAG_DIRECTED);
2514         if (skb)
2515                 ieee80211_tx_skb(sdata, skb);
2516 }
2517
2518 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2519 {
2520         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2521         const u8 *ssid;
2522         u8 *dst = ifmgd->associated->bssid;
2523         u8 unicast_limit = max(1, max_probe_tries - 3);
2524         struct sta_info *sta;
2525
2526         /*
2527          * Try sending broadcast probe requests for the last three
2528          * probe requests after the first ones failed since some
2529          * buggy APs only support broadcast probe requests.
2530          */
2531         if (ifmgd->probe_send_count >= unicast_limit)
2532                 dst = NULL;
2533
2534         /*
2535          * When the hardware reports an accurate Tx ACK status, it's
2536          * better to send a nullfunc frame instead of a probe request,
2537          * as it will kick us off the AP quickly if we aren't associated
2538          * anymore. The timeout will be reset if the frame is ACKed by
2539          * the AP.
2540          */
2541         ifmgd->probe_send_count++;
2542
2543         if (dst) {
2544                 mutex_lock(&sdata->local->sta_mtx);
2545                 sta = sta_info_get(sdata, dst);
2546                 if (!WARN_ON(!sta))
2547                         ieee80211_check_fast_rx(sta);
2548                 mutex_unlock(&sdata->local->sta_mtx);
2549         }
2550
2551         if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2552                 ifmgd->nullfunc_failed = false;
2553                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
2554                         ifmgd->probe_send_count--;
2555                 else
2556                         ieee80211_send_nullfunc(sdata->local, sdata, false);
2557         } else {
2558                 int ssid_len;
2559
2560                 rcu_read_lock();
2561                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2562                 if (WARN_ON_ONCE(ssid == NULL))
2563                         ssid_len = 0;
2564                 else
2565                         ssid_len = ssid[1];
2566
2567                 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
2568                                               ssid + 2, ssid_len,
2569                                               ifmgd->associated->channel);
2570                 rcu_read_unlock();
2571         }
2572
2573         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2574         run_again(sdata, ifmgd->probe_timeout);
2575 }
2576
2577 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2578                                    bool beacon)
2579 {
2580         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2581         bool already = false;
2582
2583         if (!ieee80211_sdata_running(sdata))
2584                 return;
2585
2586         sdata_lock(sdata);
2587
2588         if (!ifmgd->associated)
2589                 goto out;
2590
2591         mutex_lock(&sdata->local->mtx);
2592
2593         if (sdata->local->tmp_channel || sdata->local->scanning) {
2594                 mutex_unlock(&sdata->local->mtx);
2595                 goto out;
2596         }
2597
2598         if (beacon) {
2599                 mlme_dbg_ratelimited(sdata,
2600                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2601                                      beacon_loss_count);
2602
2603                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2604         }
2605
2606         /*
2607          * The driver/our work has already reported this event or the
2608          * connection monitoring has kicked in and we have already sent
2609          * a probe request. Or maybe the AP died and the driver keeps
2610          * reporting until we disassociate...
2611          *
2612          * In either case we have to ignore the current call to this
2613          * function (except for setting the correct probe reason bit)
2614          * because otherwise we would reset the timer every time and
2615          * never check whether we received a probe response!
2616          */
2617         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2618                 already = true;
2619
2620         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2621
2622         mutex_unlock(&sdata->local->mtx);
2623
2624         if (already)
2625                 goto out;
2626
2627         mutex_lock(&sdata->local->iflist_mtx);
2628         ieee80211_recalc_ps(sdata->local);
2629         mutex_unlock(&sdata->local->iflist_mtx);
2630
2631         ifmgd->probe_send_count = 0;
2632         ieee80211_mgd_probe_ap_send(sdata);
2633  out:
2634         sdata_unlock(sdata);
2635 }
2636
2637 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2638                                           struct ieee80211_vif *vif)
2639 {
2640         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2641         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2642         struct cfg80211_bss *cbss;
2643         struct sk_buff *skb;
2644         const u8 *ssid;
2645         int ssid_len;
2646
2647         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2648                 return NULL;
2649
2650         sdata_assert_lock(sdata);
2651
2652         if (ifmgd->associated)
2653                 cbss = ifmgd->associated;
2654         else if (ifmgd->auth_data)
2655                 cbss = ifmgd->auth_data->bss;
2656         else if (ifmgd->assoc_data)
2657                 cbss = ifmgd->assoc_data->bss;
2658         else
2659                 return NULL;
2660
2661         rcu_read_lock();
2662         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2663         if (WARN_ONCE(!ssid || ssid[1] > IEEE80211_MAX_SSID_LEN,
2664                       "invalid SSID element (len=%d)", ssid ? ssid[1] : -1))
2665                 ssid_len = 0;
2666         else
2667                 ssid_len = ssid[1];
2668
2669         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2670                                         (u32) -1, cbss->channel,
2671                                         ssid + 2, ssid_len,
2672                                         NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
2673         rcu_read_unlock();
2674
2675         return skb;
2676 }
2677 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2678
2679 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2680                                         const u8 *buf, size_t len, bool tx,
2681                                         u16 reason)
2682 {
2683         struct ieee80211_event event = {
2684                 .type = MLME_EVENT,
2685                 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2686                 .u.mlme.reason = reason,
2687         };
2688
2689         if (tx)
2690                 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2691         else
2692                 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2693
2694         drv_event_callback(sdata->local, sdata, &event);
2695 }
2696
2697 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2698 {
2699         struct ieee80211_local *local = sdata->local;
2700         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2701         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2702         bool tx;
2703
2704         sdata_lock(sdata);
2705         if (!ifmgd->associated) {
2706                 sdata_unlock(sdata);
2707                 return;
2708         }
2709
2710         tx = !sdata->csa_block_tx;
2711
2712         /* AP is probably out of range (or not reachable for another reason) so
2713          * remove the bss struct for that AP.
2714          */
2715         cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2716
2717         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2718                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2719                                tx, frame_buf);
2720         mutex_lock(&local->mtx);
2721         sdata->vif.csa_active = false;
2722         ifmgd->csa_waiting_bcn = false;
2723         if (sdata->csa_block_tx) {
2724                 ieee80211_wake_vif_queues(local, sdata,
2725                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2726                 sdata->csa_block_tx = false;
2727         }
2728         mutex_unlock(&local->mtx);
2729
2730         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
2731                                     WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2732
2733         sdata_unlock(sdata);
2734 }
2735
2736 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2737 {
2738         struct ieee80211_sub_if_data *sdata =
2739                 container_of(work, struct ieee80211_sub_if_data,
2740                              u.mgd.beacon_connection_loss_work);
2741         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2742
2743         if (ifmgd->associated)
2744                 ifmgd->beacon_loss_count++;
2745
2746         if (ifmgd->connection_loss) {
2747                 sdata_info(sdata, "Connection to AP %pM lost\n",
2748                            ifmgd->bssid);
2749                 __ieee80211_disconnect(sdata);
2750         } else {
2751                 ieee80211_mgd_probe_ap(sdata, true);
2752         }
2753 }
2754
2755 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2756 {
2757         struct ieee80211_sub_if_data *sdata =
2758                 container_of(work, struct ieee80211_sub_if_data,
2759                              u.mgd.csa_connection_drop_work);
2760
2761         __ieee80211_disconnect(sdata);
2762 }
2763
2764 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2765 {
2766         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2767         struct ieee80211_hw *hw = &sdata->local->hw;
2768
2769         trace_api_beacon_loss(sdata);
2770
2771         sdata->u.mgd.connection_loss = false;
2772         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2773 }
2774 EXPORT_SYMBOL(ieee80211_beacon_loss);
2775
2776 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2777 {
2778         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2779         struct ieee80211_hw *hw = &sdata->local->hw;
2780
2781         trace_api_connection_loss(sdata);
2782
2783         sdata->u.mgd.connection_loss = true;
2784         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2785 }
2786 EXPORT_SYMBOL(ieee80211_connection_loss);
2787
2788
2789 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2790                                         bool assoc)
2791 {
2792         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2793
2794         sdata_assert_lock(sdata);
2795
2796         if (!assoc) {
2797                 /*
2798                  * we are not authenticated yet, the only timer that could be
2799                  * running is the timeout for the authentication response which
2800                  * which is not relevant anymore.
2801                  */
2802                 del_timer_sync(&sdata->u.mgd.timer);
2803                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2804
2805                 eth_zero_addr(sdata->u.mgd.bssid);
2806                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2807                 sdata->u.mgd.flags = 0;
2808                 mutex_lock(&sdata->local->mtx);
2809                 ieee80211_vif_release_channel(sdata);
2810                 mutex_unlock(&sdata->local->mtx);
2811         }
2812
2813         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2814         kfree(auth_data);
2815         sdata->u.mgd.auth_data = NULL;
2816 }
2817
2818 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2819                                          bool assoc, bool abandon)
2820 {
2821         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2822
2823         sdata_assert_lock(sdata);
2824
2825         if (!assoc) {
2826                 /*
2827                  * we are not associated yet, the only timer that could be
2828                  * running is the timeout for the association response which
2829                  * which is not relevant anymore.
2830                  */
2831                 del_timer_sync(&sdata->u.mgd.timer);
2832                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2833
2834                 eth_zero_addr(sdata->u.mgd.bssid);
2835                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2836                 sdata->u.mgd.flags = 0;
2837                 sdata->vif.mu_mimo_owner = false;
2838
2839                 mutex_lock(&sdata->local->mtx);
2840                 ieee80211_vif_release_channel(sdata);
2841                 mutex_unlock(&sdata->local->mtx);
2842
2843                 if (abandon)
2844                         cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2845         }
2846
2847         kfree(assoc_data);
2848         sdata->u.mgd.assoc_data = NULL;
2849 }
2850
2851 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2852                                      struct ieee80211_mgmt *mgmt, size_t len)
2853 {
2854         struct ieee80211_local *local = sdata->local;
2855         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2856         u8 *pos;
2857         struct ieee802_11_elems elems;
2858         u32 tx_flags = 0;
2859
2860         pos = mgmt->u.auth.variable;
2861         ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
2862                                mgmt->bssid, auth_data->bss->bssid);
2863         if (!elems.challenge)
2864                 return;
2865         auth_data->expected_transaction = 4;
2866         drv_mgd_prepare_tx(sdata->local, sdata, 0);
2867         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2868                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2869                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2870         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2871                             elems.challenge - 2, elems.challenge_len + 2,
2872                             auth_data->bss->bssid, auth_data->bss->bssid,
2873                             auth_data->key, auth_data->key_len,
2874                             auth_data->key_idx, tx_flags);
2875 }
2876
2877 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata,
2878                                     const u8 *bssid)
2879 {
2880         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2881         struct sta_info *sta;
2882         bool result = true;
2883
2884         sdata_info(sdata, "authenticated\n");
2885         ifmgd->auth_data->done = true;
2886         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2887         ifmgd->auth_data->timeout_started = true;
2888         run_again(sdata, ifmgd->auth_data->timeout);
2889
2890         /* move station state to auth */
2891         mutex_lock(&sdata->local->sta_mtx);
2892         sta = sta_info_get(sdata, bssid);
2893         if (!sta) {
2894                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2895                 result = false;
2896                 goto out;
2897         }
2898         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2899                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2900                 result = false;
2901                 goto out;
2902         }
2903
2904 out:
2905         mutex_unlock(&sdata->local->sta_mtx);
2906         return result;
2907 }
2908
2909 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2910                                    struct ieee80211_mgmt *mgmt, size_t len)
2911 {
2912         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2913         u8 bssid[ETH_ALEN];
2914         u16 auth_alg, auth_transaction, status_code;
2915         struct ieee80211_event event = {
2916                 .type = MLME_EVENT,
2917                 .u.mlme.data = AUTH_EVENT,
2918         };
2919
2920         sdata_assert_lock(sdata);
2921
2922         if (len < 24 + 6)
2923                 return;
2924
2925         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2926                 return;
2927
2928         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2929
2930         if (!ether_addr_equal(bssid, mgmt->bssid))
2931                 return;
2932
2933         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2934         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2935         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2936
2937         if (auth_alg != ifmgd->auth_data->algorithm ||
2938             (auth_alg != WLAN_AUTH_SAE &&
2939              auth_transaction != ifmgd->auth_data->expected_transaction) ||
2940             (auth_alg == WLAN_AUTH_SAE &&
2941              (auth_transaction < ifmgd->auth_data->expected_transaction ||
2942               auth_transaction > 2))) {
2943                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2944                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2945                            auth_transaction,
2946                            ifmgd->auth_data->expected_transaction);
2947                 return;
2948         }
2949
2950         if (status_code != WLAN_STATUS_SUCCESS) {
2951                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2952                            mgmt->sa, status_code);
2953                 ieee80211_destroy_auth_data(sdata, false);
2954                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2955                 event.u.mlme.status = MLME_DENIED;
2956                 event.u.mlme.reason = status_code;
2957                 drv_event_callback(sdata->local, sdata, &event);
2958                 return;
2959         }
2960
2961         switch (ifmgd->auth_data->algorithm) {
2962         case WLAN_AUTH_OPEN:
2963         case WLAN_AUTH_LEAP:
2964         case WLAN_AUTH_FT:
2965         case WLAN_AUTH_SAE:
2966         case WLAN_AUTH_FILS_SK:
2967         case WLAN_AUTH_FILS_SK_PFS:
2968         case WLAN_AUTH_FILS_PK:
2969                 break;
2970         case WLAN_AUTH_SHARED_KEY:
2971                 if (ifmgd->auth_data->expected_transaction != 4) {
2972                         ieee80211_auth_challenge(sdata, mgmt, len);
2973                         /* need another frame */
2974                         return;
2975                 }
2976                 break;
2977         default:
2978                 WARN_ONCE(1, "invalid auth alg %d",
2979                           ifmgd->auth_data->algorithm);
2980                 return;
2981         }
2982
2983         event.u.mlme.status = MLME_SUCCESS;
2984         drv_event_callback(sdata->local, sdata, &event);
2985         if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
2986             (auth_transaction == 2 &&
2987              ifmgd->auth_data->expected_transaction == 2)) {
2988                 if (!ieee80211_mark_sta_auth(sdata, bssid))
2989                         return; /* ignore frame -- wait for timeout */
2990         } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2991                    auth_transaction == 2) {
2992                 sdata_info(sdata, "SAE peer confirmed\n");
2993                 ifmgd->auth_data->peer_confirmed = true;
2994         }
2995
2996         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2997 }
2998
2999 #define case_WLAN(type) \
3000         case WLAN_REASON_##type: return #type
3001
3002 const char *ieee80211_get_reason_code_string(u16 reason_code)
3003 {
3004         switch (reason_code) {
3005         case_WLAN(UNSPECIFIED);
3006         case_WLAN(PREV_AUTH_NOT_VALID);
3007         case_WLAN(DEAUTH_LEAVING);
3008         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
3009         case_WLAN(DISASSOC_AP_BUSY);
3010         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
3011         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
3012         case_WLAN(DISASSOC_STA_HAS_LEFT);
3013         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
3014         case_WLAN(DISASSOC_BAD_POWER);
3015         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
3016         case_WLAN(INVALID_IE);
3017         case_WLAN(MIC_FAILURE);
3018         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
3019         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
3020         case_WLAN(IE_DIFFERENT);
3021         case_WLAN(INVALID_GROUP_CIPHER);
3022         case_WLAN(INVALID_PAIRWISE_CIPHER);
3023         case_WLAN(INVALID_AKMP);
3024         case_WLAN(UNSUPP_RSN_VERSION);
3025         case_WLAN(INVALID_RSN_IE_CAP);
3026         case_WLAN(IEEE8021X_FAILED);
3027         case_WLAN(CIPHER_SUITE_REJECTED);
3028         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
3029         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
3030         case_WLAN(DISASSOC_LOW_ACK);
3031         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
3032         case_WLAN(QSTA_LEAVE_QBSS);
3033         case_WLAN(QSTA_NOT_USE);
3034         case_WLAN(QSTA_REQUIRE_SETUP);
3035         case_WLAN(QSTA_TIMEOUT);
3036         case_WLAN(QSTA_CIPHER_NOT_SUPP);
3037         case_WLAN(MESH_PEER_CANCELED);
3038         case_WLAN(MESH_MAX_PEERS);
3039         case_WLAN(MESH_CONFIG);
3040         case_WLAN(MESH_CLOSE);
3041         case_WLAN(MESH_MAX_RETRIES);
3042         case_WLAN(MESH_CONFIRM_TIMEOUT);
3043         case_WLAN(MESH_INVALID_GTK);
3044         case_WLAN(MESH_INCONSISTENT_PARAM);
3045         case_WLAN(MESH_INVALID_SECURITY);
3046         case_WLAN(MESH_PATH_ERROR);
3047         case_WLAN(MESH_PATH_NOFORWARD);
3048         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
3049         case_WLAN(MAC_EXISTS_IN_MBSS);
3050         case_WLAN(MESH_CHAN_REGULATORY);
3051         case_WLAN(MESH_CHAN);
3052         default: return "<unknown>";
3053         }
3054 }
3055
3056 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
3057                                      struct ieee80211_mgmt *mgmt, size_t len)
3058 {
3059         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3060         u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
3061
3062         sdata_assert_lock(sdata);
3063
3064         if (len < 24 + 2)
3065                 return;
3066
3067         if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3068                 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3069                 return;
3070         }
3071
3072         if (ifmgd->associated &&
3073             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
3074                 const u8 *bssid = ifmgd->associated->bssid;
3075
3076                 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
3077                            bssid, reason_code,
3078                            ieee80211_get_reason_code_string(reason_code));
3079
3080                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3081
3082                 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
3083                                             reason_code);
3084                 return;
3085         }
3086
3087         if (ifmgd->assoc_data &&
3088             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3089                 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
3090
3091                 sdata_info(sdata,
3092                            "deauthenticated from %pM while associating (Reason: %u=%s)\n",
3093                            bssid, reason_code,
3094                            ieee80211_get_reason_code_string(reason_code));
3095
3096                 ieee80211_destroy_assoc_data(sdata, false, true);
3097
3098                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3099                 return;
3100         }
3101 }
3102
3103
3104 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
3105                                        struct ieee80211_mgmt *mgmt, size_t len)
3106 {
3107         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3108         u16 reason_code;
3109
3110         sdata_assert_lock(sdata);
3111
3112         if (len < 24 + 2)
3113                 return;
3114
3115         if (!ifmgd->associated ||
3116             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3117                 return;
3118
3119         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
3120
3121         if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3122                 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3123                 return;
3124         }
3125
3126         sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
3127                    mgmt->sa, reason_code,
3128                    ieee80211_get_reason_code_string(reason_code));
3129
3130         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3131
3132         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
3133 }
3134
3135 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
3136                                 u8 *supp_rates, unsigned int supp_rates_len,
3137                                 u32 *rates, u32 *basic_rates,
3138                                 bool *have_higher_than_11mbit,
3139                                 int *min_rate, int *min_rate_index,
3140                                 int shift)
3141 {
3142         int i, j;
3143
3144         for (i = 0; i < supp_rates_len; i++) {
3145                 int rate = supp_rates[i] & 0x7f;
3146                 bool is_basic = !!(supp_rates[i] & 0x80);
3147
3148                 if ((rate * 5 * (1 << shift)) > 110)
3149                         *have_higher_than_11mbit = true;
3150
3151                 /*
3152                  * Skip HT and VHT BSS membership selectors since they're not
3153                  * rates.
3154                  *
3155                  * Note: Even though the membership selector and the basic
3156                  *       rate flag share the same bit, they are not exactly
3157                  *       the same.
3158                  */
3159                 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3160                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
3161                         continue;
3162
3163                 for (j = 0; j < sband->n_bitrates; j++) {
3164                         struct ieee80211_rate *br;
3165                         int brate;
3166
3167                         br = &sband->bitrates[j];
3168
3169                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3170                         if (brate == rate) {
3171                                 *rates |= BIT(j);
3172                                 if (is_basic)
3173                                         *basic_rates |= BIT(j);
3174                                 if ((rate * 5) < *min_rate) {
3175                                         *min_rate = rate * 5;
3176                                         *min_rate_index = j;
3177                                 }
3178                                 break;
3179                         }
3180                 }
3181         }
3182 }
3183
3184 static bool ieee80211_twt_req_supported(const struct sta_info *sta,
3185                                         const struct ieee802_11_elems *elems)
3186 {
3187         if (elems->ext_capab_len < 10)
3188                 return false;
3189
3190         if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
3191                 return false;
3192
3193         return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] &
3194                 IEEE80211_HE_MAC_CAP0_TWT_RES;
3195 }
3196
3197 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata,
3198                                     struct sta_info *sta,
3199                                     struct ieee802_11_elems *elems)
3200 {
3201         bool twt = ieee80211_twt_req_supported(sta, elems);
3202
3203         if (sdata->vif.bss_conf.twt_requester != twt) {
3204                 sdata->vif.bss_conf.twt_requester = twt;
3205                 return BSS_CHANGED_TWT;
3206         }
3207         return 0;
3208 }
3209
3210 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
3211                                     struct cfg80211_bss *cbss,
3212                                     struct ieee80211_mgmt *mgmt, size_t len,
3213                                     struct ieee802_11_elems *elems)
3214 {
3215         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3216         struct ieee80211_local *local = sdata->local;
3217         struct ieee80211_supported_band *sband;
3218         struct sta_info *sta;
3219         u16 capab_info, aid;
3220         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3221         const struct cfg80211_bss_ies *bss_ies = NULL;
3222         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3223         u32 changed = 0;
3224         int err;
3225         bool ret;
3226
3227         /* AssocResp and ReassocResp have identical structure */
3228
3229         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3230         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3231
3232         /*
3233          * The 5 MSB of the AID field are reserved
3234          * (802.11-2016 9.4.1.8 AID field)
3235          */
3236         aid &= 0x7ff;
3237
3238         ifmgd->broken_ap = false;
3239
3240         if (aid == 0 || aid > IEEE80211_MAX_AID) {
3241                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
3242                            aid);
3243                 aid = 0;
3244                 ifmgd->broken_ap = true;
3245         }
3246
3247         if (!elems->supp_rates) {
3248                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
3249                 return false;
3250         }
3251
3252         ifmgd->aid = aid;
3253         ifmgd->tdls_chan_switch_prohibited =
3254                 elems->ext_capab && elems->ext_capab_len >= 5 &&
3255                 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3256
3257         /*
3258          * Some APs are erroneously not including some information in their
3259          * (re)association response frames. Try to recover by using the data
3260          * from the beacon or probe response. This seems to afflict mobile
3261          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
3262          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
3263          */
3264         if ((assoc_data->wmm && !elems->wmm_param) ||
3265             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3266              (!elems->ht_cap_elem || !elems->ht_operation)) ||
3267             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3268              (!elems->vht_cap_elem || !elems->vht_operation))) {
3269                 const struct cfg80211_bss_ies *ies;
3270                 struct ieee802_11_elems bss_elems;
3271
3272                 rcu_read_lock();
3273                 ies = rcu_dereference(cbss->ies);
3274                 if (ies)
3275                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3276                                           GFP_ATOMIC);
3277                 rcu_read_unlock();
3278                 if (!bss_ies)
3279                         return false;
3280
3281                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
3282                                        false, &bss_elems,
3283                                        mgmt->bssid,
3284                                        assoc_data->bss->bssid);
3285                 if (assoc_data->wmm &&
3286                     !elems->wmm_param && bss_elems.wmm_param) {
3287                         elems->wmm_param = bss_elems.wmm_param;
3288                         sdata_info(sdata,
3289                                    "AP bug: WMM param missing from AssocResp\n");
3290                 }
3291
3292                 /*
3293                  * Also check if we requested HT/VHT, otherwise the AP doesn't
3294                  * have to include the IEs in the (re)association response.
3295                  */
3296                 if (!elems->ht_cap_elem && bss_elems.ht_cap_elem &&
3297                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3298                         elems->ht_cap_elem = bss_elems.ht_cap_elem;
3299                         sdata_info(sdata,
3300                                    "AP bug: HT capability missing from AssocResp\n");
3301                 }
3302                 if (!elems->ht_operation && bss_elems.ht_operation &&
3303                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3304                         elems->ht_operation = bss_elems.ht_operation;
3305                         sdata_info(sdata,
3306                                    "AP bug: HT operation missing from AssocResp\n");
3307                 }
3308                 if (!elems->vht_cap_elem && bss_elems.vht_cap_elem &&
3309                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3310                         elems->vht_cap_elem = bss_elems.vht_cap_elem;
3311                         sdata_info(sdata,
3312                                    "AP bug: VHT capa missing from AssocResp\n");
3313                 }
3314                 if (!elems->vht_operation && bss_elems.vht_operation &&
3315                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3316                         elems->vht_operation = bss_elems.vht_operation;
3317                         sdata_info(sdata,
3318                                    "AP bug: VHT operation missing from AssocResp\n");
3319                 }
3320         }
3321
3322         /*
3323          * We previously checked these in the beacon/probe response, so
3324          * they should be present here. This is just a safety net.
3325          */
3326         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3327             (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) {
3328                 sdata_info(sdata,
3329                            "HT AP is missing WMM params or HT capability/operation\n");
3330                 ret = false;
3331                 goto out;
3332         }
3333
3334         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3335             (!elems->vht_cap_elem || !elems->vht_operation)) {
3336                 sdata_info(sdata,
3337                            "VHT AP is missing VHT capability/operation\n");
3338                 ret = false;
3339                 goto out;
3340         }
3341
3342         mutex_lock(&sdata->local->sta_mtx);
3343         /*
3344          * station info was already allocated and inserted before
3345          * the association and should be available to us
3346          */
3347         sta = sta_info_get(sdata, cbss->bssid);
3348         if (WARN_ON(!sta)) {
3349                 mutex_unlock(&sdata->local->sta_mtx);
3350                 ret = false;
3351                 goto out;
3352         }
3353
3354         sband = ieee80211_get_sband(sdata);
3355         if (!sband) {
3356                 mutex_unlock(&sdata->local->sta_mtx);
3357                 ret = false;
3358                 goto out;
3359         }
3360
3361         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3362             (!elems->he_cap || !elems->he_operation)) {
3363                 mutex_unlock(&sdata->local->sta_mtx);
3364                 sdata_info(sdata,
3365                            "HE AP is missing HE capability/operation\n");
3366                 ret = false;
3367                 goto out;
3368         }
3369
3370         /* Set up internal HT/VHT capabilities */
3371         if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3372                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3373                                                   elems->ht_cap_elem, sta);
3374
3375         if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3376                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3377                                                     elems->vht_cap_elem, sta);
3378
3379         if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3380             elems->he_cap) {
3381                 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
3382                                                   elems->he_cap,
3383                                                   elems->he_cap_len,
3384                                                   sta);
3385
3386                 bss_conf->he_support = sta->sta.he_cap.has_he;
3387                 changed |= ieee80211_recalc_twt_req(sdata, sta, elems);
3388         } else {
3389                 bss_conf->he_support = false;
3390                 bss_conf->twt_requester = false;
3391         }
3392
3393         if (bss_conf->he_support) {
3394                 bss_conf->he_bss_color.color =
3395                         le32_get_bits(elems->he_operation->he_oper_params,
3396                                       IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
3397                 bss_conf->he_bss_color.partial =
3398                         le32_get_bits(elems->he_operation->he_oper_params,
3399                                       IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR);
3400                 bss_conf->he_bss_color.disabled =
3401                         le32_get_bits(elems->he_operation->he_oper_params,
3402                                       IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3403                 changed |= BSS_CHANGED_HE_BSS_COLOR;
3404
3405                 bss_conf->htc_trig_based_pkt_ext =
3406                         le32_get_bits(elems->he_operation->he_oper_params,
3407                               IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
3408                 bss_conf->frame_time_rts_th =
3409                         le32_get_bits(elems->he_operation->he_oper_params,
3410                               IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3411
3412                 bss_conf->multi_sta_back_32bit =
3413                         sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3414                         IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP;
3415
3416                 bss_conf->ack_enabled =
3417                         sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3418                         IEEE80211_HE_MAC_CAP2_ACK_EN;
3419
3420                 bss_conf->uora_exists = !!elems->uora_element;
3421                 if (elems->uora_element)
3422                         bss_conf->uora_ocw_range = elems->uora_element[0];
3423
3424                 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation);
3425                 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr);
3426                 /* TODO: OPEN: what happens if BSS color disable is set? */
3427         }
3428
3429         if (cbss->transmitted_bss) {
3430                 bss_conf->nontransmitted = true;
3431                 ether_addr_copy(bss_conf->transmitter_bssid,
3432                                 cbss->transmitted_bss->bssid);
3433                 bss_conf->bssid_indicator = cbss->max_bssid_indicator;
3434                 bss_conf->bssid_index = cbss->bssid_index;
3435         }
3436
3437         /*
3438          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3439          * in their association response, so ignore that data for our own
3440          * configuration. If it changed since the last beacon, we'll get the
3441          * next beacon and update then.
3442          */
3443
3444         /*
3445          * If an operating mode notification IE is present, override the
3446          * NSS calculation (that would be done in rate_control_rate_init())
3447          * and use the # of streams from that element.
3448          */
3449         if (elems->opmode_notif &&
3450             !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3451                 u8 nss;
3452
3453                 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3454                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3455                 nss += 1;
3456                 sta->sta.rx_nss = nss;
3457         }
3458
3459         rate_control_rate_init(sta);
3460
3461         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3462                 set_sta_flag(sta, WLAN_STA_MFP);
3463                 sta->sta.mfp = true;
3464         } else {
3465                 sta->sta.mfp = false;
3466         }
3467
3468         sta->sta.wme = elems->wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3469
3470         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3471         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3472                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3473         if (err) {
3474                 sdata_info(sdata,
3475                            "failed to move station %pM to desired state\n",
3476                            sta->sta.addr);
3477                 WARN_ON(__sta_info_destroy(sta));
3478                 mutex_unlock(&sdata->local->sta_mtx);
3479                 ret = false;
3480                 goto out;
3481         }
3482
3483         mutex_unlock(&sdata->local->sta_mtx);
3484
3485         /*
3486          * Always handle WMM once after association regardless
3487          * of the first value the AP uses. Setting -1 here has
3488          * that effect because the AP values is an unsigned
3489          * 4-bit value.
3490          */
3491         ifmgd->wmm_last_param_set = -1;
3492         ifmgd->mu_edca_last_param_set = -1;
3493
3494         if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3495                 ieee80211_set_wmm_default(sdata, false, false);
3496         } else if (!ieee80211_sta_wmm_params(local, sdata, elems->wmm_param,
3497                                              elems->wmm_param_len,
3498                                              elems->mu_edca_param_set)) {
3499                 /* still enable QoS since we might have HT/VHT */
3500                 ieee80211_set_wmm_default(sdata, false, true);
3501                 /* set the disable-WMM flag in this case to disable
3502                  * tracking WMM parameter changes in the beacon if
3503                  * the parameters weren't actually valid. Doing so
3504                  * avoids changing parameters very strangely when
3505                  * the AP is going back and forth between valid and
3506                  * invalid parameters.
3507                  */
3508                 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3509         }
3510         changed |= BSS_CHANGED_QOS;
3511
3512         if (elems->max_idle_period_ie) {
3513                 bss_conf->max_idle_period =
3514                         le16_to_cpu(elems->max_idle_period_ie->max_idle_period);
3515                 bss_conf->protected_keep_alive =
3516                         !!(elems->max_idle_period_ie->idle_options &
3517                            WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3518                 changed |= BSS_CHANGED_KEEP_ALIVE;
3519         } else {
3520                 bss_conf->max_idle_period = 0;
3521                 bss_conf->protected_keep_alive = false;
3522         }
3523
3524         /* set AID and assoc capability,
3525          * ieee80211_set_associated() will tell the driver */
3526         bss_conf->aid = aid;
3527         bss_conf->assoc_capability = capab_info;
3528         ieee80211_set_associated(sdata, cbss, changed);
3529
3530         /*
3531          * If we're using 4-addr mode, let the AP know that we're
3532          * doing so, so that it can create the STA VLAN on its side
3533          */
3534         if (ifmgd->use_4addr)
3535                 ieee80211_send_4addr_nullfunc(local, sdata);
3536
3537         /*
3538          * Start timer to probe the connection to the AP now.
3539          * Also start the timer that will detect beacon loss.
3540          */
3541         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3542         ieee80211_sta_reset_beacon_monitor(sdata);
3543
3544         ret = true;
3545  out:
3546         kfree(bss_ies);
3547         return ret;
3548 }
3549
3550 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3551                                          struct ieee80211_mgmt *mgmt,
3552                                          size_t len)
3553 {
3554         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3555         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3556         u16 capab_info, status_code, aid;
3557         struct ieee802_11_elems elems;
3558         int ac, uapsd_queues = -1;
3559         u8 *pos;
3560         bool reassoc;
3561         struct cfg80211_bss *bss;
3562         struct ieee80211_event event = {
3563                 .type = MLME_EVENT,
3564                 .u.mlme.data = ASSOC_EVENT,
3565         };
3566
3567         sdata_assert_lock(sdata);
3568
3569         if (!assoc_data)
3570                 return;
3571         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3572                 return;
3573
3574         /*
3575          * AssocResp and ReassocResp have identical structure, so process both
3576          * of them in this function.
3577          */
3578
3579         if (len < 24 + 6)
3580                 return;
3581
3582         reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
3583         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3584         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3585         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3586
3587         sdata_info(sdata,
3588                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3589                    reassoc ? "Rea" : "A", mgmt->sa,
3590                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3591
3592         if (assoc_data->fils_kek_len &&
3593             fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3594                 return;
3595
3596         pos = mgmt->u.assoc_resp.variable;
3597         ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
3598                                mgmt->bssid, assoc_data->bss->bssid);
3599
3600         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3601             elems.timeout_int &&
3602             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3603                 u32 tu, ms;
3604                 tu = le32_to_cpu(elems.timeout_int->value);
3605                 ms = tu * 1024 / 1000;
3606                 sdata_info(sdata,
3607                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3608                            mgmt->sa, tu, ms);
3609                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3610                 assoc_data->timeout_started = true;
3611                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3612                         run_again(sdata, assoc_data->timeout);
3613                 return;
3614         }
3615
3616         bss = assoc_data->bss;
3617
3618         if (status_code != WLAN_STATUS_SUCCESS) {
3619                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3620                            mgmt->sa, status_code);
3621                 ieee80211_destroy_assoc_data(sdata, false, false);
3622                 event.u.mlme.status = MLME_DENIED;
3623                 event.u.mlme.reason = status_code;
3624                 drv_event_callback(sdata->local, sdata, &event);
3625         } else {
3626                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len, &elems)) {
3627                         /* oops -- internal error -- send timeout for now */
3628                         ieee80211_destroy_assoc_data(sdata, false, false);
3629                         cfg80211_assoc_timeout(sdata->dev, bss);
3630                         return;
3631                 }
3632                 event.u.mlme.status = MLME_SUCCESS;
3633                 drv_event_callback(sdata->local, sdata, &event);
3634                 sdata_info(sdata, "associated\n");
3635
3636                 /*
3637                  * destroy assoc_data afterwards, as otherwise an idle
3638                  * recalc after assoc_data is NULL but before associated
3639                  * is set can cause the interface to go idle
3640                  */
3641                 ieee80211_destroy_assoc_data(sdata, true, false);
3642
3643                 /* get uapsd queues configuration */
3644                 uapsd_queues = 0;
3645                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3646                         if (sdata->tx_conf[ac].uapsd)
3647                                 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3648         }
3649
3650         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues,
3651                                ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len);
3652 }
3653
3654 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3655                                   struct ieee80211_mgmt *mgmt, size_t len,
3656                                   struct ieee80211_rx_status *rx_status)
3657 {
3658         struct ieee80211_local *local = sdata->local;
3659         struct ieee80211_bss *bss;
3660         struct ieee80211_channel *channel;
3661
3662         sdata_assert_lock(sdata);
3663
3664         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3665         if (!channel)
3666                 return;
3667
3668         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
3669         if (bss) {
3670                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3671                 ieee80211_rx_bss_put(local, bss);
3672         }
3673 }
3674
3675
3676 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3677                                          struct sk_buff *skb)
3678 {
3679         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3680         struct ieee80211_if_managed *ifmgd;
3681         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3682         struct ieee80211_channel *channel;
3683         size_t baselen, len = skb->len;
3684
3685         ifmgd = &sdata->u.mgd;
3686
3687         sdata_assert_lock(sdata);
3688
3689         /*
3690          * According to Draft P802.11ax D6.0 clause 26.17.2.3.2:
3691          * "If a 6 GHz AP receives a Probe Request frame  and responds with
3692          * a Probe Response frame [..], the Address 1 field of the Probe
3693          * Response frame shall be set to the broadcast address [..]"
3694          * So, on 6GHz band we should also accept broadcast responses.
3695          */
3696         channel = ieee80211_get_channel(sdata->local->hw.wiphy,
3697                                         rx_status->freq);
3698         if (!channel)
3699                 return;
3700
3701         if (!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
3702             (channel->band != NL80211_BAND_6GHZ ||
3703              !is_broadcast_ether_addr(mgmt->da)))
3704                 return; /* ignore ProbeResp to foreign address */
3705
3706         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3707         if (baselen > len)
3708                 return;
3709
3710         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3711
3712         if (ifmgd->associated &&
3713             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3714                 ieee80211_reset_ap_probe(sdata);
3715 }
3716
3717 /*
3718  * This is the canonical list of information elements we care about,
3719  * the filter code also gives us all changes to the Microsoft OUI
3720  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3721  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3722  * changes to requested client power.
3723  *
3724  * We implement beacon filtering in software since that means we can
3725  * avoid processing the frame here and in cfg80211, and userspace
3726  * will not be able to tell whether the hardware supports it or not.
3727  *
3728  * XXX: This list needs to be dynamic -- userspace needs to be able to
3729  *      add items it requires. It also needs to be able to tell us to
3730  *      look out for other vendor IEs.
3731  */
3732 static const u64 care_about_ies =
3733         (1ULL << WLAN_EID_COUNTRY) |
3734         (1ULL << WLAN_EID_ERP_INFO) |
3735         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3736         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3737         (1ULL << WLAN_EID_HT_CAPABILITY) |
3738         (1ULL << WLAN_EID_HT_OPERATION) |
3739         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3740
3741 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata,
3742                                         struct ieee80211_if_managed *ifmgd,
3743                                         struct ieee80211_bss_conf *bss_conf,
3744                                         struct ieee80211_local *local,
3745                                         struct ieee80211_rx_status *rx_status)
3746 {
3747         /* Track average RSSI from the Beacon frames of the current AP */
3748
3749         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3750                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3751                 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3752                 ifmgd->last_cqm_event_signal = 0;
3753                 ifmgd->count_beacon_signal = 1;
3754                 ifmgd->last_ave_beacon_signal = 0;
3755         } else {
3756                 ifmgd->count_beacon_signal++;
3757         }
3758
3759         ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3760
3761         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3762             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3763                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3764                 int last_sig = ifmgd->last_ave_beacon_signal;
3765                 struct ieee80211_event event = {
3766                         .type = RSSI_EVENT,
3767                 };
3768
3769                 /*
3770                  * if signal crosses either of the boundaries, invoke callback
3771                  * with appropriate parameters
3772                  */
3773                 if (sig > ifmgd->rssi_max_thold &&
3774                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3775                         ifmgd->last_ave_beacon_signal = sig;
3776                         event.u.rssi.data = RSSI_EVENT_HIGH;
3777                         drv_event_callback(local, sdata, &event);
3778                 } else if (sig < ifmgd->rssi_min_thold &&
3779                            (last_sig >= ifmgd->rssi_max_thold ||
3780                            last_sig == 0)) {
3781                         ifmgd->last_ave_beacon_signal = sig;
3782                         event.u.rssi.data = RSSI_EVENT_LOW;
3783                         drv_event_callback(local, sdata, &event);
3784                 }
3785         }
3786
3787         if (bss_conf->cqm_rssi_thold &&
3788             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3789             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3790                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3791                 int last_event = ifmgd->last_cqm_event_signal;
3792                 int thold = bss_conf->cqm_rssi_thold;
3793                 int hyst = bss_conf->cqm_rssi_hyst;
3794
3795                 if (sig < thold &&
3796                     (last_event == 0 || sig < last_event - hyst)) {
3797                         ifmgd->last_cqm_event_signal = sig;
3798                         ieee80211_cqm_rssi_notify(
3799                                 &sdata->vif,
3800                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3801                                 sig, GFP_KERNEL);
3802                 } else if (sig > thold &&
3803                            (last_event == 0 || sig > last_event + hyst)) {
3804                         ifmgd->last_cqm_event_signal = sig;
3805                         ieee80211_cqm_rssi_notify(
3806                                 &sdata->vif,
3807                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3808                                 sig, GFP_KERNEL);
3809                 }
3810         }
3811
3812         if (bss_conf->cqm_rssi_low &&
3813             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3814                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3815                 int last_event = ifmgd->last_cqm_event_signal;
3816                 int low = bss_conf->cqm_rssi_low;
3817                 int high = bss_conf->cqm_rssi_high;
3818
3819                 if (sig < low &&
3820                     (last_event == 0 || last_event >= low)) {
3821                         ifmgd->last_cqm_event_signal = sig;
3822                         ieee80211_cqm_rssi_notify(
3823                                 &sdata->vif,
3824                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3825                                 sig, GFP_KERNEL);
3826                 } else if (sig > high &&
3827                            (last_event == 0 || last_event <= high)) {
3828                         ifmgd->last_cqm_event_signal = sig;
3829                         ieee80211_cqm_rssi_notify(
3830                                 &sdata->vif,
3831                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3832                                 sig, GFP_KERNEL);
3833                 }
3834         }
3835 }
3836
3837 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
3838                                     struct cfg80211_bss *bss)
3839 {
3840         if (ether_addr_equal(tx_bssid, bss->bssid))
3841                 return true;
3842         if (!bss->transmitted_bss)
3843                 return false;
3844         return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid);
3845 }
3846
3847 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3848                                      struct ieee80211_mgmt *mgmt, size_t len,
3849                                      struct ieee80211_rx_status *rx_status)
3850 {
3851         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3852         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3853         size_t baselen;
3854         struct ieee802_11_elems elems;
3855         struct ieee80211_local *local = sdata->local;
3856         struct ieee80211_chanctx_conf *chanctx_conf;
3857         struct ieee80211_channel *chan;
3858         struct sta_info *sta;
3859         u32 changed = 0;
3860         bool erp_valid;
3861         u8 erp_value = 0;
3862         u32 ncrc;
3863         u8 *bssid;
3864         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3865
3866         sdata_assert_lock(sdata);
3867
3868         /* Process beacon from the current BSS */
3869         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3870         if (baselen > len)
3871                 return;
3872
3873         rcu_read_lock();
3874         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3875         if (!chanctx_conf) {
3876                 rcu_read_unlock();
3877                 return;
3878         }
3879
3880         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3881                 rcu_read_unlock();
3882                 return;
3883         }
3884         chan = chanctx_conf->def.chan;
3885         rcu_read_unlock();
3886
3887         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3888             ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->assoc_data->bss)) {
3889                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3890                                        len - baselen, false, &elems,
3891                                        mgmt->bssid,
3892                                        ifmgd->assoc_data->bss->bssid);
3893
3894                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3895
3896                 if (elems.dtim_period)
3897                         ifmgd->dtim_period = elems.dtim_period;
3898                 ifmgd->have_beacon = true;
3899                 ifmgd->assoc_data->need_beacon = false;
3900                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3901                         sdata->vif.bss_conf.sync_tsf =
3902                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3903                         sdata->vif.bss_conf.sync_device_ts =
3904                                 rx_status->device_timestamp;
3905                         sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
3906                 }
3907
3908                 if (elems.mbssid_config_ie)
3909                         bss_conf->profile_periodicity =
3910                                 elems.mbssid_config_ie->profile_periodicity;
3911
3912                 if (elems.ext_capab_len >= 11 &&
3913                     (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
3914                         bss_conf->ema_ap = true;
3915
3916                 /* continue assoc process */
3917                 ifmgd->assoc_data->timeout = jiffies;
3918                 ifmgd->assoc_data->timeout_started = true;
3919                 run_again(sdata, ifmgd->assoc_data->timeout);
3920                 return;
3921         }
3922
3923         if (!ifmgd->associated ||
3924             !ieee80211_rx_our_beacon(mgmt->bssid,  ifmgd->associated))
3925                 return;
3926         bssid = ifmgd->associated->bssid;
3927
3928         if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
3929                 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf,
3930                                             local, rx_status);
3931
3932         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3933                 mlme_dbg_ratelimited(sdata,
3934                                      "cancelling AP probe due to a received beacon\n");
3935                 ieee80211_reset_ap_probe(sdata);
3936         }
3937
3938         /*
3939          * Push the beacon loss detection into the future since
3940          * we are processing a beacon from the AP just now.
3941          */
3942         ieee80211_sta_reset_beacon_monitor(sdata);
3943
3944         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3945         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3946                                           len - baselen, false, &elems,
3947                                           care_about_ies, ncrc,
3948                                           mgmt->bssid, bssid);
3949
3950         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3951             ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3952                 if (local->hw.conf.dynamic_ps_timeout > 0) {
3953                         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3954                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3955                                 ieee80211_hw_config(local,
3956                                                     IEEE80211_CONF_CHANGE_PS);
3957                         }
3958                         ieee80211_send_nullfunc(local, sdata, false);
3959                 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3960                         local->pspolling = true;
3961
3962                         /*
3963                          * Here is assumed that the driver will be
3964                          * able to send ps-poll frame and receive a
3965                          * response even though power save mode is
3966                          * enabled, but some drivers might require
3967                          * to disable power save here. This needs
3968                          * to be investigated.
3969                          */
3970                         ieee80211_send_pspoll(local, sdata);
3971                 }
3972         }
3973
3974         if (sdata->vif.p2p ||
3975             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3976                 struct ieee80211_p2p_noa_attr noa = {};
3977                 int ret;
3978
3979                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3980                                             len - baselen,
3981                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3982                                             (u8 *) &noa, sizeof(noa));
3983                 if (ret >= 2) {
3984                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3985                                 /* valid noa_attr and index changed */
3986                                 sdata->u.mgd.p2p_noa_index = noa.index;
3987                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3988                                 changed |= BSS_CHANGED_P2P_PS;
3989                                 /*
3990                                  * make sure we update all information, the CRC
3991                                  * mechanism doesn't look at P2P attributes.
3992                                  */
3993                                 ifmgd->beacon_crc_valid = false;
3994                         }
3995                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3996                         /* noa_attr not found and we had valid noa_attr before */
3997                         sdata->u.mgd.p2p_noa_index = -1;
3998                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3999                         changed |= BSS_CHANGED_P2P_PS;
4000                         ifmgd->beacon_crc_valid = false;
4001                 }
4002         }
4003
4004         if (ifmgd->csa_waiting_bcn)
4005                 ieee80211_chswitch_post_beacon(sdata);
4006
4007         /*
4008          * Update beacon timing and dtim count on every beacon appearance. This
4009          * will allow the driver to use the most updated values. Do it before
4010          * comparing this one with last received beacon.
4011          * IMPORTANT: These parameters would possibly be out of sync by the time
4012          * the driver will use them. The synchronized view is currently
4013          * guaranteed only in certain callbacks.
4014          */
4015         if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4016                 sdata->vif.bss_conf.sync_tsf =
4017                         le64_to_cpu(mgmt->u.beacon.timestamp);
4018                 sdata->vif.bss_conf.sync_device_ts =
4019                         rx_status->device_timestamp;
4020                 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
4021         }
4022
4023         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
4024                 return;
4025         ifmgd->beacon_crc = ncrc;
4026         ifmgd->beacon_crc_valid = true;
4027
4028         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
4029
4030         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
4031                                          rx_status->device_timestamp,
4032                                          &elems, true);
4033
4034         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
4035             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
4036                                      elems.wmm_param_len,
4037                                      elems.mu_edca_param_set))
4038                 changed |= BSS_CHANGED_QOS;
4039
4040         /*
4041          * If we haven't had a beacon before, tell the driver about the
4042          * DTIM period (and beacon timing if desired) now.
4043          */
4044         if (!ifmgd->have_beacon) {
4045                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
4046                 bss_conf->dtim_period = elems.dtim_period ?: 1;
4047
4048                 changed |= BSS_CHANGED_BEACON_INFO;
4049                 ifmgd->have_beacon = true;
4050
4051                 mutex_lock(&local->iflist_mtx);
4052                 ieee80211_recalc_ps(local);
4053                 mutex_unlock(&local->iflist_mtx);
4054
4055                 ieee80211_recalc_ps_vif(sdata);
4056         }
4057
4058         if (elems.erp_info) {
4059                 erp_valid = true;
4060                 erp_value = elems.erp_info[0];
4061         } else {
4062                 erp_valid = false;
4063         }
4064         changed |= ieee80211_handle_bss_capability(sdata,
4065                         le16_to_cpu(mgmt->u.beacon.capab_info),
4066                         erp_valid, erp_value);
4067
4068         mutex_lock(&local->sta_mtx);
4069         sta = sta_info_get(sdata, bssid);
4070
4071         changed |= ieee80211_recalc_twt_req(sdata, sta, &elems);
4072
4073         if (ieee80211_config_bw(sdata, sta,
4074                                 elems.ht_cap_elem, elems.ht_operation,
4075                                 elems.vht_operation, elems.he_operation,
4076                                 bssid, &changed)) {
4077                 mutex_unlock(&local->sta_mtx);
4078                 sdata_info(sdata,
4079                            "failed to follow AP %pM bandwidth change, disconnect\n",
4080                            bssid);
4081                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4082                                        WLAN_REASON_DEAUTH_LEAVING,
4083                                        true, deauth_buf);
4084                 ieee80211_report_disconnect(sdata, deauth_buf,
4085                                             sizeof(deauth_buf), true,
4086                                             WLAN_REASON_DEAUTH_LEAVING);
4087                 return;
4088         }
4089
4090         if (sta && elems.opmode_notif)
4091                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
4092                                             rx_status->band);
4093         mutex_unlock(&local->sta_mtx);
4094
4095         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
4096                                                elems.country_elem,
4097                                                elems.country_elem_len,
4098                                                elems.pwr_constr_elem,
4099                                                elems.cisco_dtpc_elem);
4100
4101         ieee80211_bss_info_change_notify(sdata, changed);
4102 }
4103
4104 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
4105                                   struct sk_buff *skb)
4106 {
4107         struct ieee80211_rx_status *rx_status;
4108         struct ieee80211_mgmt *mgmt;
4109         u16 fc;
4110         struct ieee802_11_elems elems;
4111         int ies_len;
4112
4113         rx_status = (struct ieee80211_rx_status *) skb->cb;
4114         mgmt = (struct ieee80211_mgmt *) skb->data;
4115         fc = le16_to_cpu(mgmt->frame_control);
4116
4117         sdata_lock(sdata);
4118
4119         switch (fc & IEEE80211_FCTL_STYPE) {
4120         case IEEE80211_STYPE_BEACON:
4121                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
4122                 break;
4123         case IEEE80211_STYPE_PROBE_RESP:
4124                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
4125                 break;
4126         case IEEE80211_STYPE_AUTH:
4127                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
4128                 break;
4129         case IEEE80211_STYPE_DEAUTH:
4130                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
4131                 break;
4132         case IEEE80211_STYPE_DISASSOC:
4133                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
4134                 break;
4135         case IEEE80211_STYPE_ASSOC_RESP:
4136         case IEEE80211_STYPE_REASSOC_RESP:
4137                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
4138                 break;
4139         case IEEE80211_STYPE_ACTION:
4140                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
4141                         ies_len = skb->len -
4142                                   offsetof(struct ieee80211_mgmt,
4143                                            u.action.u.chan_switch.variable);
4144
4145                         if (ies_len < 0)
4146                                 break;
4147
4148                         /* CSA IE cannot be overridden, no need for BSSID */
4149                         ieee802_11_parse_elems(
4150                                 mgmt->u.action.u.chan_switch.variable,
4151                                 ies_len, true, &elems, mgmt->bssid, NULL);
4152
4153                         if (elems.parse_error)
4154                                 break;
4155
4156                         ieee80211_sta_process_chanswitch(sdata,
4157                                                  rx_status->mactime,
4158                                                  rx_status->device_timestamp,
4159                                                  &elems, false);
4160                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
4161                         ies_len = skb->len -
4162                                   offsetof(struct ieee80211_mgmt,
4163                                            u.action.u.ext_chan_switch.variable);
4164
4165                         if (ies_len < 0)
4166                                 break;
4167
4168                         /*
4169                          * extended CSA IE can't be overridden, no need for
4170                          * BSSID
4171                          */
4172                         ieee802_11_parse_elems(
4173                                 mgmt->u.action.u.ext_chan_switch.variable,
4174                                 ies_len, true, &elems, mgmt->bssid, NULL);
4175
4176                         if (elems.parse_error)
4177                                 break;
4178
4179                         /* for the handling code pretend this was also an IE */
4180                         elems.ext_chansw_ie =
4181                                 &mgmt->u.action.u.ext_chan_switch.data;
4182
4183                         ieee80211_sta_process_chanswitch(sdata,
4184                                                  rx_status->mactime,
4185                                                  rx_status->device_timestamp,
4186                                                  &elems, false);
4187                 }
4188                 break;
4189         }
4190         sdata_unlock(sdata);
4191 }
4192
4193 static void ieee80211_sta_timer(struct timer_list *t)
4194 {
4195         struct ieee80211_sub_if_data *sdata =
4196                 from_timer(sdata, t, u.mgd.timer);
4197
4198         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4199 }
4200
4201 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
4202                                           u8 *bssid, u8 reason, bool tx)
4203 {
4204         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4205
4206         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
4207                                tx, frame_buf);
4208
4209         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4210                                     reason);
4211 }
4212
4213 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
4214 {
4215         struct ieee80211_local *local = sdata->local;
4216         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4217         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
4218         u32 tx_flags = 0;
4219         u16 trans = 1;
4220         u16 status = 0;
4221         u16 prepare_tx_duration = 0;
4222
4223         sdata_assert_lock(sdata);
4224
4225         if (WARN_ON_ONCE(!auth_data))
4226                 return -EINVAL;
4227
4228         auth_data->tries++;
4229
4230         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
4231                 sdata_info(sdata, "authentication with %pM timed out\n",
4232                            auth_data->bss->bssid);
4233
4234                 /*
4235                  * Most likely AP is not in the range so remove the
4236                  * bss struct for that AP.
4237                  */
4238                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
4239
4240                 return -ETIMEDOUT;
4241         }
4242
4243         if (auth_data->algorithm == WLAN_AUTH_SAE)
4244                 prepare_tx_duration =
4245                         jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
4246
4247         drv_mgd_prepare_tx(local, sdata, prepare_tx_duration);
4248
4249         sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
4250                    auth_data->bss->bssid, auth_data->tries,
4251                    IEEE80211_AUTH_MAX_TRIES);
4252
4253         auth_data->expected_transaction = 2;
4254
4255         if (auth_data->algorithm == WLAN_AUTH_SAE) {
4256                 trans = auth_data->sae_trans;
4257                 status = auth_data->sae_status;
4258                 auth_data->expected_transaction = trans;
4259         }
4260
4261         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4262                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
4263                            IEEE80211_TX_INTFL_MLME_CONN_TX;
4264
4265         ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
4266                             auth_data->data, auth_data->data_len,
4267                             auth_data->bss->bssid,
4268                             auth_data->bss->bssid, NULL, 0, 0,
4269                             tx_flags);
4270
4271         if (tx_flags == 0) {
4272                 if (auth_data->algorithm == WLAN_AUTH_SAE)
4273                         auth_data->timeout = jiffies +
4274                                 IEEE80211_AUTH_TIMEOUT_SAE;
4275                 else
4276                         auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
4277         } else {
4278                 auth_data->timeout =
4279                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
4280         }
4281
4282         auth_data->timeout_started = true;
4283         run_again(sdata, auth_data->timeout);
4284
4285         return 0;
4286 }
4287
4288 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
4289 {
4290         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
4291         struct ieee80211_local *local = sdata->local;
4292
4293         sdata_assert_lock(sdata);
4294
4295         assoc_data->tries++;
4296         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
4297                 sdata_info(sdata, "association with %pM timed out\n",
4298                            assoc_data->bss->bssid);
4299
4300                 /*
4301                  * Most likely AP is not in the range so remove the
4302                  * bss struct for that AP.
4303                  */
4304                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
4305
4306                 return -ETIMEDOUT;
4307         }
4308
4309         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
4310                    assoc_data->bss->bssid, assoc_data->tries,
4311                    IEEE80211_ASSOC_MAX_TRIES);
4312         ieee80211_send_assoc(sdata);
4313
4314         if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4315                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
4316                 assoc_data->timeout_started = true;
4317                 run_again(sdata, assoc_data->timeout);
4318         } else {
4319                 assoc_data->timeout =
4320                         round_jiffies_up(jiffies +
4321                                          IEEE80211_ASSOC_TIMEOUT_LONG);
4322                 assoc_data->timeout_started = true;
4323                 run_again(sdata, assoc_data->timeout);
4324         }
4325
4326         return 0;
4327 }
4328
4329 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
4330                                   __le16 fc, bool acked)
4331 {
4332         struct ieee80211_local *local = sdata->local;
4333
4334         sdata->u.mgd.status_fc = fc;
4335         sdata->u.mgd.status_acked = acked;
4336         sdata->u.mgd.status_received = true;
4337
4338         ieee80211_queue_work(&local->hw, &sdata->work);
4339 }
4340
4341 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
4342 {
4343         struct ieee80211_local *local = sdata->local;
4344         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4345
4346         sdata_lock(sdata);
4347
4348         if (ifmgd->status_received) {
4349                 __le16 fc = ifmgd->status_fc;
4350                 bool status_acked = ifmgd->status_acked;
4351
4352                 ifmgd->status_received = false;
4353                 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
4354                         if (status_acked) {
4355                                 if (ifmgd->auth_data->algorithm ==
4356                                     WLAN_AUTH_SAE)
4357                                         ifmgd->auth_data->timeout =
4358                                                 jiffies +
4359                                                 IEEE80211_AUTH_TIMEOUT_SAE;
4360                                 else
4361                                         ifmgd->auth_data->timeout =
4362                                                 jiffies +
4363                                                 IEEE80211_AUTH_TIMEOUT_SHORT;
4364                                 run_again(sdata, ifmgd->auth_data->timeout);
4365                         } else {
4366                                 ifmgd->auth_data->timeout = jiffies - 1;
4367                         }
4368                         ifmgd->auth_data->timeout_started = true;
4369                 } else if (ifmgd->assoc_data &&
4370                            (ieee80211_is_assoc_req(fc) ||
4371                             ieee80211_is_reassoc_req(fc))) {
4372                         if (status_acked) {
4373                                 ifmgd->assoc_data->timeout =
4374                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
4375                                 run_again(sdata, ifmgd->assoc_data->timeout);
4376                         } else {
4377                                 ifmgd->assoc_data->timeout = jiffies - 1;
4378                         }
4379                         ifmgd->assoc_data->timeout_started = true;
4380                 }
4381         }
4382
4383         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
4384             time_after(jiffies, ifmgd->auth_data->timeout)) {
4385                 if (ifmgd->auth_data->done) {
4386                         /*
4387                          * ok ... we waited for assoc but userspace didn't,
4388                          * so let's just kill the auth data
4389                          */
4390                         ieee80211_destroy_auth_data(sdata, false);
4391                 } else if (ieee80211_auth(sdata)) {
4392                         u8 bssid[ETH_ALEN];
4393                         struct ieee80211_event event = {
4394                                 .type = MLME_EVENT,
4395                                 .u.mlme.data = AUTH_EVENT,
4396                                 .u.mlme.status = MLME_TIMEOUT,
4397                         };
4398
4399                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
4400
4401                         ieee80211_destroy_auth_data(sdata, false);
4402
4403                         cfg80211_auth_timeout(sdata->dev, bssid);
4404                         drv_event_callback(sdata->local, sdata, &event);
4405                 }
4406         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
4407                 run_again(sdata, ifmgd->auth_data->timeout);
4408
4409         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
4410             time_after(jiffies, ifmgd->assoc_data->timeout)) {
4411                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
4412                     ieee80211_do_assoc(sdata)) {
4413                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4414                         struct ieee80211_event event = {
4415                                 .type = MLME_EVENT,
4416                                 .u.mlme.data = ASSOC_EVENT,
4417                                 .u.mlme.status = MLME_TIMEOUT,
4418                         };
4419
4420                         ieee80211_destroy_assoc_data(sdata, false, false);
4421                         cfg80211_assoc_timeout(sdata->dev, bss);
4422                         drv_event_callback(sdata->local, sdata, &event);
4423                 }
4424         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
4425                 run_again(sdata, ifmgd->assoc_data->timeout);
4426
4427         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
4428             ifmgd->associated) {
4429                 u8 bssid[ETH_ALEN];
4430                 int max_tries;
4431
4432                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4433
4434                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4435                         max_tries = max_nullfunc_tries;
4436                 else
4437                         max_tries = max_probe_tries;
4438
4439                 /* ACK received for nullfunc probing frame */
4440                 if (!ifmgd->probe_send_count)
4441                         ieee80211_reset_ap_probe(sdata);
4442                 else if (ifmgd->nullfunc_failed) {
4443                         if (ifmgd->probe_send_count < max_tries) {
4444                                 mlme_dbg(sdata,
4445                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
4446                                          bssid, ifmgd->probe_send_count,
4447                                          max_tries);
4448                                 ieee80211_mgd_probe_ap_send(sdata);
4449                         } else {
4450                                 mlme_dbg(sdata,
4451                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
4452                                          bssid);
4453                                 ieee80211_sta_connection_lost(sdata, bssid,
4454                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4455                                         false);
4456                         }
4457                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
4458                         run_again(sdata, ifmgd->probe_timeout);
4459                 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4460                         mlme_dbg(sdata,
4461                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
4462                                  bssid, probe_wait_ms);
4463                         ieee80211_sta_connection_lost(sdata, bssid,
4464                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4465                 } else if (ifmgd->probe_send_count < max_tries) {
4466                         mlme_dbg(sdata,
4467                                  "No probe response from AP %pM after %dms, try %d/%i\n",
4468                                  bssid, probe_wait_ms,
4469                                  ifmgd->probe_send_count, max_tries);
4470                         ieee80211_mgd_probe_ap_send(sdata);
4471                 } else {
4472                         /*
4473                          * We actually lost the connection ... or did we?
4474                          * Let's make sure!
4475                          */
4476                         mlme_dbg(sdata,
4477                                  "No probe response from AP %pM after %dms, disconnecting.\n",
4478                                  bssid, probe_wait_ms);
4479
4480                         ieee80211_sta_connection_lost(sdata, bssid,
4481                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4482                 }
4483         }
4484
4485         sdata_unlock(sdata);
4486 }
4487
4488 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
4489 {
4490         struct ieee80211_sub_if_data *sdata =
4491                 from_timer(sdata, t, u.mgd.bcn_mon_timer);
4492         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4493
4494         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4495                 return;
4496
4497         sdata->u.mgd.connection_loss = false;
4498         ieee80211_queue_work(&sdata->local->hw,
4499                              &sdata->u.mgd.beacon_connection_loss_work);
4500 }
4501
4502 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
4503 {
4504         struct ieee80211_sub_if_data *sdata =
4505                 from_timer(sdata, t, u.mgd.conn_mon_timer);
4506         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4507         struct ieee80211_local *local = sdata->local;
4508
4509         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4510                 return;
4511
4512         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4513 }
4514
4515 static void ieee80211_sta_monitor_work(struct work_struct *work)
4516 {
4517         struct ieee80211_sub_if_data *sdata =
4518                 container_of(work, struct ieee80211_sub_if_data,
4519                              u.mgd.monitor_work);
4520
4521         ieee80211_mgd_probe_ap(sdata, false);
4522 }
4523
4524 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4525 {
4526         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4527                 __ieee80211_stop_poll(sdata);
4528
4529                 /* let's probe the connection once */
4530                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4531                         ieee80211_queue_work(&sdata->local->hw,
4532                                              &sdata->u.mgd.monitor_work);
4533         }
4534 }
4535
4536 #ifdef CONFIG_PM
4537 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4538 {
4539         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4540         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4541
4542         sdata_lock(sdata);
4543
4544         if (ifmgd->auth_data || ifmgd->assoc_data) {
4545                 const u8 *bssid = ifmgd->auth_data ?
4546                                 ifmgd->auth_data->bss->bssid :
4547                                 ifmgd->assoc_data->bss->bssid;
4548
4549                 /*
4550                  * If we are trying to authenticate / associate while suspending,
4551                  * cfg80211 won't know and won't actually abort those attempts,
4552                  * thus we need to do that ourselves.
4553                  */
4554                 ieee80211_send_deauth_disassoc(sdata, bssid, bssid,
4555                                                IEEE80211_STYPE_DEAUTH,
4556                                                WLAN_REASON_DEAUTH_LEAVING,
4557                                                false, frame_buf);
4558                 if (ifmgd->assoc_data)
4559                         ieee80211_destroy_assoc_data(sdata, false, true);
4560                 if (ifmgd->auth_data)
4561                         ieee80211_destroy_auth_data(sdata, false);
4562                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4563                                       IEEE80211_DEAUTH_FRAME_LEN);
4564         }
4565
4566         /* This is a bit of a hack - we should find a better and more generic
4567          * solution to this. Normally when suspending, cfg80211 will in fact
4568          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4569          * auth (not so important) or assoc (this is the problem) process.
4570          *
4571          * As a consequence, it can happen that we are in the process of both
4572          * associating and suspending, and receive an association response
4573          * after cfg80211 has checked if it needs to disconnect, but before
4574          * we actually set the flag to drop incoming frames. This will then
4575          * cause the workqueue flush to process the association response in
4576          * the suspend, resulting in a successful association just before it
4577          * tries to remove the interface from the driver, which now though
4578          * has a channel context assigned ... this results in issues.
4579          *
4580          * To work around this (for now) simply deauth here again if we're
4581          * now connected.
4582          */
4583         if (ifmgd->associated && !sdata->local->wowlan) {
4584                 u8 bssid[ETH_ALEN];
4585                 struct cfg80211_deauth_request req = {
4586                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4587                         .bssid = bssid,
4588                 };
4589
4590                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4591                 ieee80211_mgd_deauth(sdata, &req);
4592         }
4593
4594         sdata_unlock(sdata);
4595 }
4596
4597 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4598 {
4599         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4600
4601         sdata_lock(sdata);
4602         if (!ifmgd->associated) {
4603                 sdata_unlock(sdata);
4604                 return;
4605         }
4606
4607         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4608                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4609                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4610                 ieee80211_sta_connection_lost(sdata,
4611                                               ifmgd->associated->bssid,
4612                                               WLAN_REASON_UNSPECIFIED,
4613                                               true);
4614                 sdata_unlock(sdata);
4615                 return;
4616         }
4617         sdata_unlock(sdata);
4618 }
4619 #endif
4620
4621 /* interface setup */
4622 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4623 {
4624         struct ieee80211_if_managed *ifmgd;
4625
4626         ifmgd = &sdata->u.mgd;
4627         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4628         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4629         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4630                   ieee80211_beacon_connection_loss_work);
4631         INIT_WORK(&ifmgd->csa_connection_drop_work,
4632                   ieee80211_csa_connection_drop_work);
4633         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4634         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4635                           ieee80211_tdls_peer_del_work);
4636         timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
4637         timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
4638         timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
4639         timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
4640         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4641                           ieee80211_sta_handle_tspec_ac_params_wk);
4642
4643         ifmgd->flags = 0;
4644         ifmgd->powersave = sdata->wdev.ps;
4645         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4646         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4647         ifmgd->p2p_noa_index = -1;
4648
4649         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4650                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4651         else
4652                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4653
4654         /* Setup TDLS data */
4655         spin_lock_init(&ifmgd->teardown_lock);
4656         ifmgd->teardown_skb = NULL;
4657         ifmgd->orig_teardown_skb = NULL;
4658 }
4659
4660 /* scan finished notification */
4661 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4662 {
4663         struct ieee80211_sub_if_data *sdata;
4664
4665         /* Restart STA timers */
4666         rcu_read_lock();
4667         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4668                 if (ieee80211_sdata_running(sdata))
4669                         ieee80211_restart_sta_timer(sdata);
4670         }
4671         rcu_read_unlock();
4672 }
4673
4674 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4675                                      struct cfg80211_bss *cbss)
4676 {
4677         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4678         const u8 *ht_cap_ie, *vht_cap_ie;
4679         const struct ieee80211_ht_cap *ht_cap;
4680         const struct ieee80211_vht_cap *vht_cap;
4681         u8 chains = 1;
4682
4683         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4684                 return chains;
4685
4686         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4687         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4688                 ht_cap = (void *)(ht_cap_ie + 2);
4689                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4690                 /*
4691                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4692                  *       "Tx Unequal Modulation Supported" fields.
4693                  */
4694         }
4695
4696         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4697                 return chains;
4698
4699         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4700         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4701                 u8 nss;
4702                 u16 tx_mcs_map;
4703
4704                 vht_cap = (void *)(vht_cap_ie + 2);
4705                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4706                 for (nss = 8; nss > 0; nss--) {
4707                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4708                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4709                                 break;
4710                 }
4711                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4712                 chains = max(chains, nss);
4713         }
4714
4715         return chains;
4716 }
4717
4718 static bool
4719 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband,
4720                                     const struct ieee80211_he_operation *he_op)
4721 {
4722         const struct ieee80211_sta_he_cap *sta_he_cap =
4723                 ieee80211_get_he_sta_cap(sband);
4724         u16 ap_min_req_set;
4725         int i;
4726
4727         if (!sta_he_cap || !he_op)
4728                 return false;
4729
4730         ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4731
4732         /* Need to go over for 80MHz, 160MHz and for 80+80 */
4733         for (i = 0; i < 3; i++) {
4734                 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
4735                         &sta_he_cap->he_mcs_nss_supp;
4736                 u16 sta_mcs_map_rx =
4737                         le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
4738                 u16 sta_mcs_map_tx =
4739                         le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
4740                 u8 nss;
4741                 bool verified = true;
4742
4743                 /*
4744                  * For each band there is a maximum of 8 spatial streams
4745                  * possible. Each of the sta_mcs_map_* is a 16-bit struct built
4746                  * of 2 bits per NSS (1-8), with the values defined in enum
4747                  * ieee80211_he_mcs_support. Need to make sure STA TX and RX
4748                  * capabilities aren't less than the AP's minimum requirements
4749                  * for this HE BSS per SS.
4750                  * It is enough to find one such band that meets the reqs.
4751                  */
4752                 for (nss = 8; nss > 0; nss--) {
4753                         u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
4754                         u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
4755                         u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4756
4757                         if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4758                                 continue;
4759
4760                         /*
4761                          * Make sure the HE AP doesn't require MCSs that aren't
4762                          * supported by the client
4763                          */
4764                         if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4765                             sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4766                             (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
4767                                 verified = false;
4768                                 break;
4769                         }
4770                 }
4771
4772                 if (verified)
4773                         return true;
4774         }
4775
4776         /* If here, STA doesn't meet AP's HE min requirements */
4777         return false;
4778 }
4779
4780 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4781                                   struct cfg80211_bss *cbss)
4782 {
4783         struct ieee80211_local *local = sdata->local;
4784         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4785         const struct ieee80211_ht_cap *ht_cap = NULL;
4786         const struct ieee80211_ht_operation *ht_oper = NULL;
4787         const struct ieee80211_vht_operation *vht_oper = NULL;
4788         const struct ieee80211_he_operation *he_oper = NULL;
4789         struct ieee80211_supported_band *sband;
4790         struct cfg80211_chan_def chandef;
4791         int ret;
4792         u32 i;
4793         bool have_80mhz;
4794
4795         sband = local->hw.wiphy->bands[cbss->channel->band];
4796
4797         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4798                           IEEE80211_STA_DISABLE_80P80MHZ |
4799                           IEEE80211_STA_DISABLE_160MHZ);
4800
4801         /* disable HT/VHT/HE if we don't support them */
4802         if (!sband->ht_cap.ht_supported) {
4803                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4804                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4805                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4806         }
4807
4808         if (!sband->vht_cap.vht_supported)
4809                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4810
4811         if (!ieee80211_get_he_sta_cap(sband))
4812                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4813
4814         rcu_read_lock();
4815
4816         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4817                 const u8 *ht_oper_ie, *ht_cap_ie;
4818
4819                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4820                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4821                         ht_oper = (void *)(ht_oper_ie + 2);
4822
4823                 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4824                 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4825                         ht_cap = (void *)(ht_cap_ie + 2);
4826
4827                 if (!ht_cap) {
4828                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4829                         ht_oper = NULL;
4830                 }
4831         }
4832
4833         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
4834                 const u8 *vht_oper_ie, *vht_cap;
4835
4836                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4837                                                    WLAN_EID_VHT_OPERATION);
4838                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4839                         vht_oper = (void *)(vht_oper_ie + 2);
4840                 if (vht_oper && !ht_oper) {
4841                         vht_oper = NULL;
4842                         sdata_info(sdata,
4843                                    "AP advertised VHT without HT, disabling HT/VHT/HE\n");
4844                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4845                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4846                         ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4847                 }
4848
4849                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4850                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4851                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4852                         vht_oper = NULL;
4853                 }
4854         }
4855
4856         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) {
4857                 const struct cfg80211_bss_ies *ies;
4858                 const u8 *he_oper_ie;
4859
4860                 ies = rcu_dereference(cbss->ies);
4861                 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION,
4862                                                   ies->data, ies->len);
4863                 if (he_oper_ie &&
4864                     he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3]))
4865                         he_oper = (void *)(he_oper_ie + 3);
4866                 else
4867                         he_oper = NULL;
4868
4869                 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper))
4870                         ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4871         }
4872
4873         /* Allow VHT if at least one channel on the sband supports 80 MHz */
4874         have_80mhz = false;
4875         for (i = 0; i < sband->n_channels; i++) {
4876                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4877                                                 IEEE80211_CHAN_NO_80MHZ))
4878                         continue;
4879
4880                 have_80mhz = true;
4881                 break;
4882         }
4883
4884         if (!have_80mhz)
4885                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4886
4887         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4888                                                      cbss->channel,
4889                                                      ht_oper, vht_oper, he_oper,
4890                                                      &chandef, false);
4891
4892         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4893                                       local->rx_chains);
4894
4895         rcu_read_unlock();
4896
4897         /* will change later if needed */
4898         sdata->smps_mode = IEEE80211_SMPS_OFF;
4899
4900         mutex_lock(&local->mtx);
4901         /*
4902          * If this fails (possibly due to channel context sharing
4903          * on incompatible channels, e.g. 80+80 and 160 sharing the
4904          * same control channel) try to use a smaller bandwidth.
4905          */
4906         ret = ieee80211_vif_use_channel(sdata, &chandef,
4907                                         IEEE80211_CHANCTX_SHARED);
4908
4909         /* don't downgrade for 5 and 10 MHz channels, though. */
4910         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4911             chandef.width == NL80211_CHAN_WIDTH_10)
4912                 goto out;
4913
4914         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4915                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4916                 ret = ieee80211_vif_use_channel(sdata, &chandef,
4917                                                 IEEE80211_CHANCTX_SHARED);
4918         }
4919  out:
4920         mutex_unlock(&local->mtx);
4921         return ret;
4922 }
4923
4924 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies,
4925                                u8 *dtim_count, u8 *dtim_period)
4926 {
4927         const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len);
4928         const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data,
4929                                          ies->len);
4930         const struct ieee80211_tim_ie *tim = NULL;
4931         const struct ieee80211_bssid_index *idx;
4932         bool valid = tim_ie && tim_ie[1] >= 2;
4933
4934         if (valid)
4935                 tim = (void *)(tim_ie + 2);
4936
4937         if (dtim_count)
4938                 *dtim_count = valid ? tim->dtim_count : 0;
4939
4940         if (dtim_period)
4941                 *dtim_period = valid ? tim->dtim_period : 0;
4942
4943         /* Check if value is overridden by non-transmitted profile */
4944         if (!idx_ie || idx_ie[1] < 3)
4945                 return valid;
4946
4947         idx = (void *)(idx_ie + 2);
4948
4949         if (dtim_count)
4950                 *dtim_count = idx->dtim_count;
4951
4952         if (dtim_period)
4953                 *dtim_period = idx->dtim_period;
4954
4955         return true;
4956 }
4957
4958 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4959                                      struct cfg80211_bss *cbss, bool assoc,
4960                                      bool override)
4961 {
4962         struct ieee80211_local *local = sdata->local;
4963         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4964         struct ieee80211_bss *bss = (void *)cbss->priv;
4965         struct sta_info *new_sta = NULL;
4966         struct ieee80211_supported_band *sband;
4967         bool have_sta = false;
4968         int err;
4969
4970         sband = local->hw.wiphy->bands[cbss->channel->band];
4971
4972         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4973                 return -EINVAL;
4974
4975         /* If a reconfig is happening, bail out */
4976         if (local->in_reconfig)
4977                 return -EBUSY;
4978
4979         if (assoc) {
4980                 rcu_read_lock();
4981                 have_sta = sta_info_get(sdata, cbss->bssid);
4982                 rcu_read_unlock();
4983         }
4984
4985         if (!have_sta) {
4986                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4987                 if (!new_sta)
4988                         return -ENOMEM;
4989         }
4990
4991         /*
4992          * Set up the information for the new channel before setting the
4993          * new channel. We can't - completely race-free - change the basic
4994          * rates bitmap and the channel (sband) that it refers to, but if
4995          * we set it up before we at least avoid calling into the driver's
4996          * bss_info_changed() method with invalid information (since we do
4997          * call that from changing the channel - only for IDLE and perhaps
4998          * some others, but ...).
4999          *
5000          * So to avoid that, just set up all the new information before the
5001          * channel, but tell the driver to apply it only afterwards, since
5002          * it might need the new channel for that.
5003          */
5004         if (new_sta) {
5005                 u32 rates = 0, basic_rates = 0;
5006                 bool have_higher_than_11mbit;
5007                 int min_rate = INT_MAX, min_rate_index = -1;
5008                 const struct cfg80211_bss_ies *ies;
5009                 int shift = ieee80211_vif_get_shift(&sdata->vif);
5010
5011                 ieee80211_get_rates(sband, bss->supp_rates,
5012                                     bss->supp_rates_len,
5013                                     &rates, &basic_rates,
5014                                     &have_higher_than_11mbit,
5015                                     &min_rate, &min_rate_index,
5016                                     shift);
5017
5018                 /*
5019                  * This used to be a workaround for basic rates missing
5020                  * in the association response frame. Now that we no
5021                  * longer use the basic rates from there, it probably
5022                  * doesn't happen any more, but keep the workaround so
5023                  * in case some *other* APs are buggy in different ways
5024                  * we can connect -- with a warning.
5025                  */
5026                 if (!basic_rates && min_rate_index >= 0) {
5027                         sdata_info(sdata,
5028                                    "No basic rates, using min rate instead\n");
5029                         basic_rates = BIT(min_rate_index);
5030                 }
5031
5032                 if (rates)
5033                         new_sta->sta.supp_rates[cbss->channel->band] = rates;
5034                 else
5035                         sdata_info(sdata,
5036                                    "No rates found, keeping mandatory only\n");
5037
5038                 sdata->vif.bss_conf.basic_rates = basic_rates;
5039
5040                 /* cf. IEEE 802.11 9.2.12 */
5041                 if (cbss->channel->band == NL80211_BAND_2GHZ &&
5042                     have_higher_than_11mbit)
5043                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
5044                 else
5045                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
5046
5047                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
5048
5049                 /* set timing information */
5050                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
5051                 rcu_read_lock();
5052                 ies = rcu_dereference(cbss->beacon_ies);
5053                 if (ies) {
5054                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
5055                         sdata->vif.bss_conf.sync_device_ts =
5056                                 bss->device_ts_beacon;
5057
5058                         ieee80211_get_dtim(ies,
5059                                            &sdata->vif.bss_conf.sync_dtim_count,
5060                                            NULL);
5061                 } else if (!ieee80211_hw_check(&sdata->local->hw,
5062                                                TIMING_BEACON_ONLY)) {
5063                         ies = rcu_dereference(cbss->proberesp_ies);
5064                         /* must be non-NULL since beacon IEs were NULL */
5065                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
5066                         sdata->vif.bss_conf.sync_device_ts =
5067                                 bss->device_ts_presp;
5068                         sdata->vif.bss_conf.sync_dtim_count = 0;
5069                 } else {
5070                         sdata->vif.bss_conf.sync_tsf = 0;
5071                         sdata->vif.bss_conf.sync_device_ts = 0;
5072                         sdata->vif.bss_conf.sync_dtim_count = 0;
5073                 }
5074                 rcu_read_unlock();
5075         }
5076
5077         if (new_sta || override) {
5078                 err = ieee80211_prep_channel(sdata, cbss);
5079                 if (err) {
5080                         if (new_sta)
5081                                 sta_info_free(local, new_sta);
5082                         return -EINVAL;
5083                 }
5084         }
5085
5086         if (new_sta) {
5087                 /*
5088                  * tell driver about BSSID, basic rates and timing
5089                  * this was set up above, before setting the channel
5090                  */
5091                 ieee80211_bss_info_change_notify(sdata,
5092                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
5093                         BSS_CHANGED_BEACON_INT);
5094
5095                 if (assoc)
5096                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
5097
5098                 err = sta_info_insert(new_sta);
5099                 new_sta = NULL;
5100                 if (err) {
5101                         sdata_info(sdata,
5102                                    "failed to insert STA entry for the AP (error %d)\n",
5103                                    err);
5104                         return err;
5105                 }
5106         } else
5107                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
5108
5109         /* Cancel scan to ensure that nothing interferes with connection */
5110         if (local->scanning)
5111                 ieee80211_scan_cancel(local);
5112
5113         return 0;
5114 }
5115
5116 /* config hooks */
5117 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
5118                        struct cfg80211_auth_request *req)
5119 {
5120         struct ieee80211_local *local = sdata->local;
5121         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5122         struct ieee80211_mgd_auth_data *auth_data;
5123         u16 auth_alg;
5124         int err;
5125         bool cont_auth;
5126
5127         /* prepare auth data structure */
5128
5129         switch (req->auth_type) {
5130         case NL80211_AUTHTYPE_OPEN_SYSTEM:
5131                 auth_alg = WLAN_AUTH_OPEN;
5132                 break;
5133         case NL80211_AUTHTYPE_SHARED_KEY:
5134                 if (fips_enabled)
5135                         return -EOPNOTSUPP;
5136                 auth_alg = WLAN_AUTH_SHARED_KEY;
5137                 break;
5138         case NL80211_AUTHTYPE_FT:
5139                 auth_alg = WLAN_AUTH_FT;
5140                 break;
5141         case NL80211_AUTHTYPE_NETWORK_EAP:
5142                 auth_alg = WLAN_AUTH_LEAP;
5143                 break;
5144         case NL80211_AUTHTYPE_SAE:
5145                 auth_alg = WLAN_AUTH_SAE;
5146                 break;
5147         case NL80211_AUTHTYPE_FILS_SK:
5148                 auth_alg = WLAN_AUTH_FILS_SK;
5149                 break;
5150         case NL80211_AUTHTYPE_FILS_SK_PFS:
5151                 auth_alg = WLAN_AUTH_FILS_SK_PFS;
5152                 break;
5153         case NL80211_AUTHTYPE_FILS_PK:
5154                 auth_alg = WLAN_AUTH_FILS_PK;
5155                 break;
5156         default:
5157                 return -EOPNOTSUPP;
5158         }
5159
5160         if (ifmgd->assoc_data)
5161                 return -EBUSY;
5162
5163         auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
5164                             req->ie_len, GFP_KERNEL);
5165         if (!auth_data)
5166                 return -ENOMEM;
5167
5168         auth_data->bss = req->bss;
5169
5170         if (req->auth_data_len >= 4) {
5171                 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
5172                         __le16 *pos = (__le16 *) req->auth_data;
5173
5174                         auth_data->sae_trans = le16_to_cpu(pos[0]);
5175                         auth_data->sae_status = le16_to_cpu(pos[1]);
5176                 }
5177                 memcpy(auth_data->data, req->auth_data + 4,
5178                        req->auth_data_len - 4);
5179                 auth_data->data_len += req->auth_data_len - 4;
5180         }
5181
5182         /* Check if continuing authentication or trying to authenticate with the
5183          * same BSS that we were in the process of authenticating with and avoid
5184          * removal and re-addition of the STA entry in
5185          * ieee80211_prep_connection().
5186          */
5187         cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss;
5188
5189         if (req->ie && req->ie_len) {
5190                 memcpy(&auth_data->data[auth_data->data_len],
5191                        req->ie, req->ie_len);
5192                 auth_data->data_len += req->ie_len;
5193         }
5194
5195         if (req->key && req->key_len) {
5196                 auth_data->key_len = req->key_len;
5197                 auth_data->key_idx = req->key_idx;
5198                 memcpy(auth_data->key, req->key, req->key_len);
5199         }
5200
5201         auth_data->algorithm = auth_alg;
5202
5203         /* try to authenticate/probe */
5204
5205         if (ifmgd->auth_data) {
5206                 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
5207                         auth_data->peer_confirmed =
5208                                 ifmgd->auth_data->peer_confirmed;
5209                 }
5210                 ieee80211_destroy_auth_data(sdata, cont_auth);
5211         }
5212
5213         /* prep auth_data so we don't go into idle on disassoc */
5214         ifmgd->auth_data = auth_data;
5215
5216         /* If this is continuation of an ongoing SAE authentication exchange
5217          * (i.e., request to send SAE Confirm) and the peer has already
5218          * confirmed, mark authentication completed since we are about to send
5219          * out SAE Confirm.
5220          */
5221         if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
5222             auth_data->peer_confirmed && auth_data->sae_trans == 2)
5223                 ieee80211_mark_sta_auth(sdata, req->bss->bssid);
5224
5225         if (ifmgd->associated) {
5226                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5227
5228                 sdata_info(sdata,
5229                            "disconnect from AP %pM for new auth to %pM\n",
5230                            ifmgd->associated->bssid, req->bss->bssid);
5231                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5232                                        WLAN_REASON_UNSPECIFIED,
5233                                        false, frame_buf);
5234
5235                 ieee80211_report_disconnect(sdata, frame_buf,
5236                                             sizeof(frame_buf), true,
5237                                             WLAN_REASON_UNSPECIFIED);
5238         }
5239
5240         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
5241
5242         err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false);
5243         if (err)
5244                 goto err_clear;
5245
5246         err = ieee80211_auth(sdata);
5247         if (err) {
5248                 sta_info_destroy_addr(sdata, req->bss->bssid);
5249                 goto err_clear;
5250         }
5251
5252         /* hold our own reference */
5253         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
5254         return 0;
5255
5256  err_clear:
5257         eth_zero_addr(ifmgd->bssid);
5258         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5259         ifmgd->auth_data = NULL;
5260         mutex_lock(&sdata->local->mtx);
5261         ieee80211_vif_release_channel(sdata);
5262         mutex_unlock(&sdata->local->mtx);
5263         kfree(auth_data);
5264         return err;
5265 }
5266
5267 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
5268                         struct cfg80211_assoc_request *req)
5269 {
5270         struct ieee80211_local *local = sdata->local;
5271         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5272         struct ieee80211_bss *bss = (void *)req->bss->priv;
5273         struct ieee80211_mgd_assoc_data *assoc_data;
5274         const struct cfg80211_bss_ies *beacon_ies;
5275         struct ieee80211_supported_band *sband;
5276         const u8 *ssidie, *ht_ie, *vht_ie;
5277         int i, err;
5278         bool override = false;
5279
5280         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
5281         if (!assoc_data)
5282                 return -ENOMEM;
5283
5284         rcu_read_lock();
5285         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
5286         if (!ssidie || ssidie[1] > sizeof(assoc_data->ssid)) {
5287                 rcu_read_unlock();
5288                 kfree(assoc_data);
5289                 return -EINVAL;
5290         }
5291         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
5292         assoc_data->ssid_len = ssidie[1];
5293         rcu_read_unlock();
5294
5295         if (ifmgd->associated) {
5296                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5297
5298                 sdata_info(sdata,
5299                            "disconnect from AP %pM for new assoc to %pM\n",
5300                            ifmgd->associated->bssid, req->bss->bssid);
5301                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5302                                        WLAN_REASON_UNSPECIFIED,
5303                                        false, frame_buf);
5304
5305                 ieee80211_report_disconnect(sdata, frame_buf,
5306                                             sizeof(frame_buf), true,
5307                                             WLAN_REASON_UNSPECIFIED);
5308         }
5309
5310         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
5311                 err = -EBUSY;
5312                 goto err_free;
5313         }
5314
5315         if (ifmgd->assoc_data) {
5316                 err = -EBUSY;
5317                 goto err_free;
5318         }
5319
5320         if (ifmgd->auth_data) {
5321                 bool match;
5322
5323                 /* keep sta info, bssid if matching */
5324                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
5325                 ieee80211_destroy_auth_data(sdata, match);
5326         }
5327
5328         /* prepare assoc data */
5329
5330         ifmgd->beacon_crc_valid = false;
5331
5332         assoc_data->wmm = bss->wmm_used &&
5333                           (local->hw.queues >= IEEE80211_NUM_ACS);
5334
5335         /*
5336          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
5337          * We still associate in non-HT mode (11a/b/g) if any one of these
5338          * ciphers is configured as pairwise.
5339          * We can set this to true for non-11n hardware, that'll be checked
5340          * separately along with the peer capabilities.
5341          */
5342         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
5343                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
5344                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
5345                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5346                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5347                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5348                         ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5349                         netdev_info(sdata->dev,
5350                                     "disabling HT/VHT/HE due to WEP/TKIP use\n");
5351                 }
5352         }
5353
5354         sband = local->hw.wiphy->bands[req->bss->channel->band];
5355
5356         /* also disable HT/VHT/HE if the AP doesn't use WMM */
5357         if (!bss->wmm_used) {
5358                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5359                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5360                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5361                 netdev_info(sdata->dev,
5362                             "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n");
5363         }
5364
5365         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
5366         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
5367                sizeof(ifmgd->ht_capa_mask));
5368
5369         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
5370         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
5371                sizeof(ifmgd->vht_capa_mask));
5372
5373         if (req->ie && req->ie_len) {
5374                 memcpy(assoc_data->ie, req->ie, req->ie_len);
5375                 assoc_data->ie_len = req->ie_len;
5376         }
5377
5378         if (req->fils_kek) {
5379                 /* should already be checked in cfg80211 - so warn */
5380                 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
5381                         err = -EINVAL;
5382                         goto err_free;
5383                 }
5384                 memcpy(assoc_data->fils_kek, req->fils_kek,
5385                        req->fils_kek_len);
5386                 assoc_data->fils_kek_len = req->fils_kek_len;
5387         }
5388
5389         if (req->fils_nonces)
5390                 memcpy(assoc_data->fils_nonces, req->fils_nonces,
5391                        2 * FILS_NONCE_LEN);
5392
5393         assoc_data->bss = req->bss;
5394
5395         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
5396                 if (ifmgd->powersave)
5397                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
5398                 else
5399                         sdata->smps_mode = IEEE80211_SMPS_OFF;
5400         } else
5401                 sdata->smps_mode = ifmgd->req_smps;
5402
5403         assoc_data->capability = req->bss->capability;
5404         assoc_data->supp_rates = bss->supp_rates;
5405         assoc_data->supp_rates_len = bss->supp_rates_len;
5406
5407         rcu_read_lock();
5408         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
5409         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
5410                 assoc_data->ap_ht_param =
5411                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
5412         else
5413                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5414         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
5415         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
5416                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
5417                        sizeof(struct ieee80211_vht_cap));
5418         else
5419                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5420         rcu_read_unlock();
5421
5422         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
5423                  ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
5424              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
5425                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
5426
5427         if (bss->wmm_used && bss->uapsd_supported &&
5428             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
5429                 assoc_data->uapsd = true;
5430                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
5431         } else {
5432                 assoc_data->uapsd = false;
5433                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
5434         }
5435
5436         if (req->prev_bssid)
5437                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
5438
5439         if (req->use_mfp) {
5440                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
5441                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
5442         } else {
5443                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
5444                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
5445         }
5446
5447         if (req->flags & ASSOC_REQ_USE_RRM)
5448                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
5449         else
5450                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
5451
5452         if (req->crypto.control_port)
5453                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
5454         else
5455                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
5456
5457         sdata->control_port_protocol = req->crypto.control_port_ethertype;
5458         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
5459         sdata->control_port_over_nl80211 =
5460                                         req->crypto.control_port_over_nl80211;
5461         sdata->control_port_no_preauth = req->crypto.control_port_no_preauth;
5462         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
5463                                                         sdata->vif.type);
5464
5465         /* kick off associate process */
5466
5467         ifmgd->assoc_data = assoc_data;
5468         ifmgd->dtim_period = 0;
5469         ifmgd->have_beacon = false;
5470
5471         /* override HT/VHT configuration only if the AP and we support it */
5472         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
5473                 struct ieee80211_sta_ht_cap sta_ht_cap;
5474
5475                 if (req->flags & ASSOC_REQ_DISABLE_HT)
5476                         override = true;
5477
5478                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
5479                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
5480
5481                 /* check for 40 MHz disable override */
5482                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
5483                     sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
5484                     !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
5485                         override = true;
5486
5487                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
5488                     req->flags & ASSOC_REQ_DISABLE_VHT)
5489                         override = true;
5490         }
5491
5492         if (req->flags & ASSOC_REQ_DISABLE_HT) {
5493                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5494                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5495                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5496         }
5497
5498         if (req->flags & ASSOC_REQ_DISABLE_VHT)
5499                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5500
5501         err = ieee80211_prep_connection(sdata, req->bss, true, override);
5502         if (err)
5503                 goto err_clear;
5504
5505         rcu_read_lock();
5506         beacon_ies = rcu_dereference(req->bss->beacon_ies);
5507
5508         if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
5509             !beacon_ies) {
5510                 /*
5511                  * Wait up to one beacon interval ...
5512                  * should this be more if we miss one?
5513                  */
5514                 sdata_info(sdata, "waiting for beacon from %pM\n",
5515                            ifmgd->bssid);
5516                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
5517                 assoc_data->timeout_started = true;
5518                 assoc_data->need_beacon = true;
5519         } else if (beacon_ies) {
5520                 const u8 *ie;
5521                 u8 dtim_count = 0;
5522
5523                 ieee80211_get_dtim(beacon_ies, &dtim_count,
5524                                    &ifmgd->dtim_period);
5525
5526                 ifmgd->have_beacon = true;
5527                 assoc_data->timeout = jiffies;
5528                 assoc_data->timeout_started = true;
5529
5530                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5531                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
5532                         sdata->vif.bss_conf.sync_device_ts =
5533                                 bss->device_ts_beacon;
5534                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
5535                 }
5536
5537                 ie = cfg80211_find_ext_ie(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
5538                                           beacon_ies->data, beacon_ies->len);
5539                 if (ie && ie[1] >= 3)
5540                         sdata->vif.bss_conf.profile_periodicity = ie[4];
5541
5542                 ie = cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY,
5543                                       beacon_ies->data, beacon_ies->len);
5544                 if (ie && ie[1] >= 11 &&
5545                     (ie[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
5546                         sdata->vif.bss_conf.ema_ap = true;
5547         } else {
5548                 assoc_data->timeout = jiffies;
5549                 assoc_data->timeout_started = true;
5550         }
5551         rcu_read_unlock();
5552
5553         run_again(sdata, assoc_data->timeout);
5554
5555         if (bss->corrupt_data) {
5556                 char *corrupt_type = "data";
5557                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
5558                         if (bss->corrupt_data &
5559                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
5560                                 corrupt_type = "beacon and probe response";
5561                         else
5562                                 corrupt_type = "beacon";
5563                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
5564                         corrupt_type = "probe response";
5565                 sdata_info(sdata, "associating with AP with corrupt %s\n",
5566                            corrupt_type);
5567         }
5568
5569         return 0;
5570  err_clear:
5571         eth_zero_addr(ifmgd->bssid);
5572         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5573         ifmgd->assoc_data = NULL;
5574  err_free:
5575         kfree(assoc_data);
5576         return err;
5577 }
5578
5579 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
5580                          struct cfg80211_deauth_request *req)
5581 {
5582         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5583         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5584         bool tx = !req->local_state_change;
5585
5586         if (ifmgd->auth_data &&
5587             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
5588                 sdata_info(sdata,
5589                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
5590                            req->bssid, req->reason_code,
5591                            ieee80211_get_reason_code_string(req->reason_code));
5592
5593                 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5594                 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
5595                                                IEEE80211_STYPE_DEAUTH,
5596                                                req->reason_code, tx,
5597                                                frame_buf);
5598                 ieee80211_destroy_auth_data(sdata, false);
5599                 ieee80211_report_disconnect(sdata, frame_buf,
5600                                             sizeof(frame_buf), true,
5601                                             req->reason_code);
5602
5603                 return 0;
5604         }
5605
5606         if (ifmgd->assoc_data &&
5607             ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
5608                 sdata_info(sdata,
5609                            "aborting association with %pM by local choice (Reason: %u=%s)\n",
5610                            req->bssid, req->reason_code,
5611                            ieee80211_get_reason_code_string(req->reason_code));
5612
5613                 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5614                 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
5615                                                IEEE80211_STYPE_DEAUTH,
5616                                                req->reason_code, tx,
5617                                                frame_buf);
5618                 ieee80211_destroy_assoc_data(sdata, false, true);
5619                 ieee80211_report_disconnect(sdata, frame_buf,
5620                                             sizeof(frame_buf), true,
5621                                             req->reason_code);
5622                 return 0;
5623         }
5624
5625         if (ifmgd->associated &&
5626             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5627                 sdata_info(sdata,
5628                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5629                            req->bssid, req->reason_code,
5630                            ieee80211_get_reason_code_string(req->reason_code));
5631
5632                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5633                                        req->reason_code, tx, frame_buf);
5634                 ieee80211_report_disconnect(sdata, frame_buf,
5635                                             sizeof(frame_buf), true,
5636                                             req->reason_code);
5637                 return 0;
5638         }
5639
5640         return -ENOTCONN;
5641 }
5642
5643 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5644                            struct cfg80211_disassoc_request *req)
5645 {
5646         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5647         u8 bssid[ETH_ALEN];
5648         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5649
5650         /*
5651          * cfg80211 should catch this ... but it's racy since
5652          * we can receive a disassoc frame, process it, hand it
5653          * to cfg80211 while that's in a locked section already
5654          * trying to tell us that the user wants to disconnect.
5655          */
5656         if (ifmgd->associated != req->bss)
5657                 return -ENOLINK;
5658
5659         sdata_info(sdata,
5660                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
5661                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5662
5663         memcpy(bssid, req->bss->bssid, ETH_ALEN);
5664         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5665                                req->reason_code, !req->local_state_change,
5666                                frame_buf);
5667
5668         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5669                                     req->reason_code);
5670
5671         return 0;
5672 }
5673
5674 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5675 {
5676         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5677
5678         /*
5679          * Make sure some work items will not run after this,
5680          * they will not do anything but might not have been
5681          * cancelled when disconnecting.
5682          */
5683         cancel_work_sync(&ifmgd->monitor_work);
5684         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5685         cancel_work_sync(&ifmgd->request_smps_work);
5686         cancel_work_sync(&ifmgd->csa_connection_drop_work);
5687         cancel_work_sync(&ifmgd->chswitch_work);
5688         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5689
5690         sdata_lock(sdata);
5691         if (ifmgd->assoc_data) {
5692                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5693                 ieee80211_destroy_assoc_data(sdata, false, false);
5694                 cfg80211_assoc_timeout(sdata->dev, bss);
5695         }
5696         if (ifmgd->auth_data)
5697                 ieee80211_destroy_auth_data(sdata, false);
5698         spin_lock_bh(&ifmgd->teardown_lock);
5699         if (ifmgd->teardown_skb) {
5700                 kfree_skb(ifmgd->teardown_skb);
5701                 ifmgd->teardown_skb = NULL;
5702                 ifmgd->orig_teardown_skb = NULL;
5703         }
5704         kfree(ifmgd->assoc_req_ies);
5705         ifmgd->assoc_req_ies = NULL;
5706         ifmgd->assoc_req_ies_len = 0;
5707         spin_unlock_bh(&ifmgd->teardown_lock);
5708         del_timer_sync(&ifmgd->timer);
5709         sdata_unlock(sdata);
5710 }
5711
5712 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5713                                enum nl80211_cqm_rssi_threshold_event rssi_event,
5714                                s32 rssi_level,
5715                                gfp_t gfp)
5716 {
5717         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5718
5719         trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5720
5721         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5722 }
5723 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5724
5725 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5726 {
5727         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5728
5729         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5730
5731         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5732 }
5733 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);