Merge tag 'iwlwifi-for-kalle-2020-03-08' of git://git.kernel.org/pub/scm/linux/kernel...
[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 | IEEE80211_STA_DISABLE_VHT;
168                 goto out;
169         }
170
171         chandef->width = NL80211_CHAN_WIDTH_20;
172
173         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
174                                                   channel->band);
175         /* check that channel matches the right operating channel */
176         if (!tracking && channel->center_freq != ht_cfreq) {
177                 /*
178                  * It's possible that some APs are confused here;
179                  * Netgear WNDR3700 sometimes reports 4 higher than
180                  * the actual channel in association responses, but
181                  * since we look at probe response/beacon data here
182                  * it should be OK.
183                  */
184                 sdata_info(sdata,
185                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
186                            channel->center_freq, ht_cfreq,
187                            ht_oper->primary_chan, channel->band);
188                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
189                 goto out;
190         }
191
192         /* check 40 MHz support, if we have it */
193         if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
194                 ieee80211_chandef_ht_oper(ht_oper, chandef);
195         } else {
196                 /* 40 MHz (and 80 MHz) must be supported for VHT */
197                 ret = IEEE80211_STA_DISABLE_VHT;
198                 /* also mark 40 MHz disabled */
199                 ret |= IEEE80211_STA_DISABLE_40MHZ;
200                 goto out;
201         }
202
203         if (!vht_oper || !sband->vht_cap.vht_supported) {
204                 ret = IEEE80211_STA_DISABLE_VHT;
205                 goto out;
206         }
207
208         vht_chandef = *chandef;
209         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper &&
210             (le32_to_cpu(he_oper->he_oper_params) &
211              IEEE80211_HE_OPERATION_VHT_OPER_INFO)) {
212                 struct ieee80211_vht_operation he_oper_vht_cap;
213
214                 /*
215                  * Set only first 3 bytes (other 2 aren't used in
216                  * ieee80211_chandef_vht_oper() anyway)
217                  */
218                 memcpy(&he_oper_vht_cap, he_oper->optional, 3);
219                 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0);
220
221                 if (!ieee80211_chandef_vht_oper(&sdata->local->hw,
222                                                 &he_oper_vht_cap, ht_oper,
223                                                 &vht_chandef)) {
224                         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
225                                 sdata_info(sdata,
226                                            "HE AP VHT information is invalid, disable HE\n");
227                         ret = IEEE80211_STA_DISABLE_HE;
228                         goto out;
229                 }
230         } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_oper,
231                                                ht_oper, &vht_chandef)) {
232                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
233                         sdata_info(sdata,
234                                    "AP VHT information is invalid, disable VHT\n");
235                 ret = IEEE80211_STA_DISABLE_VHT;
236                 goto out;
237         }
238
239         if (!cfg80211_chandef_valid(&vht_chandef)) {
240                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
241                         sdata_info(sdata,
242                                    "AP VHT information is invalid, disable VHT\n");
243                 ret = IEEE80211_STA_DISABLE_VHT;
244                 goto out;
245         }
246
247         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
248                 ret = 0;
249                 goto out;
250         }
251
252         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
253                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
254                         sdata_info(sdata,
255                                    "AP VHT information doesn't match HT, disable VHT\n");
256                 ret = IEEE80211_STA_DISABLE_VHT;
257                 goto out;
258         }
259
260         *chandef = vht_chandef;
261
262         ret = 0;
263
264 out:
265         /*
266          * When tracking the current AP, don't do any further checks if the
267          * new chandef is identical to the one we're currently using for the
268          * connection. This keeps us from playing ping-pong with regulatory,
269          * without it the following can happen (for example):
270          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
271          *  - AP advertises regdom US
272          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
273          *  - the code below detects an unsupported channel, downgrades, and
274          *    we disconnect from the AP in the caller
275          *  - disconnect causes CRDA to reload world regdomain and the game
276          *    starts anew.
277          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
278          *
279          * It seems possible that there are still scenarios with CSA or real
280          * bandwidth changes where a this could happen, but those cases are
281          * less common and wouldn't completely prevent using the AP.
282          */
283         if (tracking &&
284             cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
285                 return ret;
286
287         /* don't print the message below for VHT mismatch if VHT is disabled */
288         if (ret & IEEE80211_STA_DISABLE_VHT)
289                 vht_chandef = *chandef;
290
291         /*
292          * Ignore the DISABLED flag when we're already connected and only
293          * tracking the APs beacon for bandwidth changes - otherwise we
294          * might get disconnected here if we connect to an AP, update our
295          * regulatory information based on the AP's country IE and the
296          * information we have is wrong/outdated and disables the channel
297          * that we're actually using for the connection to the AP.
298          */
299         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
300                                         tracking ? 0 :
301                                                    IEEE80211_CHAN_DISABLED)) {
302                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
303                         ret = IEEE80211_STA_DISABLE_HT |
304                               IEEE80211_STA_DISABLE_VHT;
305                         break;
306                 }
307
308                 ret |= ieee80211_chandef_downgrade(chandef);
309         }
310
311         if (chandef->width != vht_chandef.width && !tracking)
312                 sdata_info(sdata,
313                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
314
315         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
316         return ret;
317 }
318
319 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
320                                struct sta_info *sta,
321                                const struct ieee80211_ht_cap *ht_cap,
322                                const struct ieee80211_ht_operation *ht_oper,
323                                const struct ieee80211_vht_operation *vht_oper,
324                                const struct ieee80211_he_operation *he_oper,
325                                const u8 *bssid, u32 *changed)
326 {
327         struct ieee80211_local *local = sdata->local;
328         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
329         struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan;
330         struct ieee80211_supported_band *sband =
331                 local->hw.wiphy->bands[chan->band];
332         struct cfg80211_chan_def chandef;
333         u16 ht_opmode;
334         u32 flags;
335         enum ieee80211_sta_rx_bandwidth new_sta_bw;
336         int ret;
337
338         /* if HT was/is disabled, don't track any bandwidth changes */
339         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
340                 return 0;
341
342         /* don't check VHT if we associated as non-VHT station */
343         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
344                 vht_oper = NULL;
345
346         /* don't check HE if we associated as non-HE station */
347         if (ifmgd->flags & IEEE80211_STA_DISABLE_HE ||
348             !ieee80211_get_he_sta_cap(sband))
349                 he_oper = NULL;
350
351         if (WARN_ON_ONCE(!sta))
352                 return -EINVAL;
353
354         /*
355          * if bss configuration changed store the new one -
356          * this may be applicable even if channel is identical
357          */
358         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
359         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
360                 *changed |= BSS_CHANGED_HT;
361                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
362         }
363
364         /* calculate new channel (type) based on HT/VHT/HE operation IEs */
365         flags = ieee80211_determine_chantype(sdata, sband, chan,
366                                              ht_oper, vht_oper, he_oper,
367                                              &chandef, true);
368
369         /*
370          * Downgrade the new channel if we associated with restricted
371          * capabilities. For example, if we associated as a 20 MHz STA
372          * to a 40 MHz AP (due to regulatory, capabilities or config
373          * reasons) then switching to a 40 MHz channel now won't do us
374          * any good -- we couldn't use it with the AP.
375          */
376         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
377             chandef.width == NL80211_CHAN_WIDTH_80P80)
378                 flags |= ieee80211_chandef_downgrade(&chandef);
379         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
380             chandef.width == NL80211_CHAN_WIDTH_160)
381                 flags |= ieee80211_chandef_downgrade(&chandef);
382         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
383             chandef.width > NL80211_CHAN_WIDTH_20)
384                 flags |= ieee80211_chandef_downgrade(&chandef);
385
386         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
387                 return 0;
388
389         sdata_info(sdata,
390                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
391                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
392                    chandef.center_freq1, chandef.center_freq2);
393
394         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
395                                       IEEE80211_STA_DISABLE_VHT |
396                                       IEEE80211_STA_DISABLE_40MHZ |
397                                       IEEE80211_STA_DISABLE_80P80MHZ |
398                                       IEEE80211_STA_DISABLE_160MHZ)) ||
399             !cfg80211_chandef_valid(&chandef)) {
400                 sdata_info(sdata,
401                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
402                            ifmgd->bssid);
403                 return -EINVAL;
404         }
405
406         switch (chandef.width) {
407         case NL80211_CHAN_WIDTH_20_NOHT:
408         case NL80211_CHAN_WIDTH_20:
409                 new_sta_bw = IEEE80211_STA_RX_BW_20;
410                 break;
411         case NL80211_CHAN_WIDTH_40:
412                 new_sta_bw = IEEE80211_STA_RX_BW_40;
413                 break;
414         case NL80211_CHAN_WIDTH_80:
415                 new_sta_bw = IEEE80211_STA_RX_BW_80;
416                 break;
417         case NL80211_CHAN_WIDTH_80P80:
418         case NL80211_CHAN_WIDTH_160:
419                 new_sta_bw = IEEE80211_STA_RX_BW_160;
420                 break;
421         default:
422                 return -EINVAL;
423         }
424
425         if (new_sta_bw > sta->cur_max_bandwidth)
426                 new_sta_bw = sta->cur_max_bandwidth;
427
428         if (new_sta_bw < sta->sta.bandwidth) {
429                 sta->sta.bandwidth = new_sta_bw;
430                 rate_control_rate_update(local, sband, sta,
431                                          IEEE80211_RC_BW_CHANGED);
432         }
433
434         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
435         if (ret) {
436                 sdata_info(sdata,
437                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
438                            ifmgd->bssid);
439                 return ret;
440         }
441
442         if (new_sta_bw > sta->sta.bandwidth) {
443                 sta->sta.bandwidth = new_sta_bw;
444                 rate_control_rate_update(local, sband, sta,
445                                          IEEE80211_RC_BW_CHANGED);
446         }
447
448         return 0;
449 }
450
451 /* frame sending functions */
452
453 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
454                                 struct sk_buff *skb, u8 ap_ht_param,
455                                 struct ieee80211_supported_band *sband,
456                                 struct ieee80211_channel *channel,
457                                 enum ieee80211_smps_mode smps)
458 {
459         u8 *pos;
460         u32 flags = channel->flags;
461         u16 cap;
462         struct ieee80211_sta_ht_cap ht_cap;
463
464         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
465
466         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
467         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
468
469         /* determine capability flags */
470         cap = ht_cap.cap;
471
472         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
473         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
474                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
475                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
476                         cap &= ~IEEE80211_HT_CAP_SGI_40;
477                 }
478                 break;
479         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
480                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
481                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
482                         cap &= ~IEEE80211_HT_CAP_SGI_40;
483                 }
484                 break;
485         }
486
487         /*
488          * If 40 MHz was disabled associate as though we weren't
489          * capable of 40 MHz -- some broken APs will never fall
490          * back to trying to transmit in 20 MHz.
491          */
492         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
493                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
494                 cap &= ~IEEE80211_HT_CAP_SGI_40;
495         }
496
497         /* set SM PS mode properly */
498         cap &= ~IEEE80211_HT_CAP_SM_PS;
499         switch (smps) {
500         case IEEE80211_SMPS_AUTOMATIC:
501         case IEEE80211_SMPS_NUM_MODES:
502                 WARN_ON(1);
503                 /* fall through */
504         case IEEE80211_SMPS_OFF:
505                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
506                         IEEE80211_HT_CAP_SM_PS_SHIFT;
507                 break;
508         case IEEE80211_SMPS_STATIC:
509                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
510                         IEEE80211_HT_CAP_SM_PS_SHIFT;
511                 break;
512         case IEEE80211_SMPS_DYNAMIC:
513                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
514                         IEEE80211_HT_CAP_SM_PS_SHIFT;
515                 break;
516         }
517
518         /* reserve and fill IE */
519         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
520         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
521 }
522
523 /* This function determines vht capability flags for the association
524  * and builds the IE.
525  * Note - the function may set the owner of the MU-MIMO capability
526  */
527 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
528                                  struct sk_buff *skb,
529                                  struct ieee80211_supported_band *sband,
530                                  struct ieee80211_vht_cap *ap_vht_cap)
531 {
532         struct ieee80211_local *local = sdata->local;
533         u8 *pos;
534         u32 cap;
535         struct ieee80211_sta_vht_cap vht_cap;
536         u32 mask, ap_bf_sts, our_bf_sts;
537
538         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
539
540         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
541         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
542
543         /* determine capability flags */
544         cap = vht_cap.cap;
545
546         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
547                 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
548
549                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
550                 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
551                     bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
552                         cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
553         }
554
555         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
556                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
557                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
558         }
559
560         /*
561          * Some APs apparently get confused if our capabilities are better
562          * than theirs, so restrict what we advertise in the assoc request.
563          */
564         if (!(ap_vht_cap->vht_cap_info &
565                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
566                 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
567                          IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
568         else if (!(ap_vht_cap->vht_cap_info &
569                         cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
570                 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
571
572         /*
573          * If some other vif is using the MU-MIMO capablity we cannot associate
574          * using MU-MIMO - this will lead to contradictions in the group-id
575          * mechanism.
576          * Ownership is defined since association request, in order to avoid
577          * simultaneous associations with MU-MIMO.
578          */
579         if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
580                 bool disable_mu_mimo = false;
581                 struct ieee80211_sub_if_data *other;
582
583                 list_for_each_entry_rcu(other, &local->interfaces, list) {
584                         if (other->vif.mu_mimo_owner) {
585                                 disable_mu_mimo = true;
586                                 break;
587                         }
588                 }
589                 if (disable_mu_mimo)
590                         cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
591                 else
592                         sdata->vif.mu_mimo_owner = true;
593         }
594
595         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
596
597         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
598         our_bf_sts = cap & mask;
599
600         if (ap_bf_sts < our_bf_sts) {
601                 cap &= ~mask;
602                 cap |= ap_bf_sts;
603         }
604
605         /* reserve and fill IE */
606         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
607         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
608 }
609
610 /* This function determines HE capability flags for the association
611  * and builds the IE.
612  */
613 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
614                                 struct sk_buff *skb,
615                                 struct ieee80211_supported_band *sband)
616 {
617         u8 *pos;
618         const struct ieee80211_sta_he_cap *he_cap = NULL;
619         u8 he_cap_size;
620
621         he_cap = ieee80211_get_he_sta_cap(sband);
622         if (!he_cap)
623                 return;
624
625         /*
626          * TODO: the 1 added is because this temporarily is under the EXTENSION
627          * IE. Get rid of it when it moves.
628          */
629         he_cap_size =
630                 2 + 1 + sizeof(he_cap->he_cap_elem) +
631                 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) +
632                 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
633                                       he_cap->he_cap_elem.phy_cap_info);
634         pos = skb_put(skb, he_cap_size);
635         ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size);
636 }
637
638 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
639 {
640         struct ieee80211_local *local = sdata->local;
641         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
642         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
643         struct sk_buff *skb;
644         struct ieee80211_mgmt *mgmt;
645         u8 *pos, qos_info, *ie_start;
646         size_t offset = 0, noffset;
647         int i, count, rates_len, supp_rates_len, shift;
648         u16 capab;
649         struct ieee80211_supported_band *sband;
650         struct ieee80211_chanctx_conf *chanctx_conf;
651         struct ieee80211_channel *chan;
652         u32 rates = 0;
653
654         sdata_assert_lock(sdata);
655
656         rcu_read_lock();
657         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
658         if (WARN_ON(!chanctx_conf)) {
659                 rcu_read_unlock();
660                 return;
661         }
662         chan = chanctx_conf->def.chan;
663         rcu_read_unlock();
664         sband = local->hw.wiphy->bands[chan->band];
665         shift = ieee80211_vif_get_shift(&sdata->vif);
666
667         if (assoc_data->supp_rates_len) {
668                 /*
669                  * Get all rates supported by the device and the AP as
670                  * some APs don't like getting a superset of their rates
671                  * in the association request (e.g. D-Link DAP 1353 in
672                  * b-only mode)...
673                  */
674                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
675                                                      assoc_data->supp_rates,
676                                                      assoc_data->supp_rates_len,
677                                                      &rates);
678         } else {
679                 /*
680                  * In case AP not provide any supported rates information
681                  * before association, we send information element(s) with
682                  * all rates that we support.
683                  */
684                 rates_len = 0;
685                 for (i = 0; i < sband->n_bitrates; i++) {
686                         rates |= BIT(i);
687                         rates_len++;
688                 }
689         }
690
691         skb = alloc_skb(local->hw.extra_tx_headroom +
692                         sizeof(*mgmt) + /* bit too much but doesn't matter */
693                         2 + assoc_data->ssid_len + /* SSID */
694                         4 + rates_len + /* (extended) rates */
695                         4 + /* power capability */
696                         2 + 2 * sband->n_channels + /* supported channels */
697                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
698                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
699                         2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */
700                                 sizeof(struct ieee80211_he_mcs_nss_supp) +
701                                 IEEE80211_HE_PPE_THRES_MAX_LEN +
702                         assoc_data->ie_len + /* extra IEs */
703                         (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
704                         9, /* WMM */
705                         GFP_KERNEL);
706         if (!skb)
707                 return;
708
709         skb_reserve(skb, local->hw.extra_tx_headroom);
710
711         capab = WLAN_CAPABILITY_ESS;
712
713         if (sband->band == NL80211_BAND_2GHZ) {
714                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
715                 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
716         }
717
718         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
719                 capab |= WLAN_CAPABILITY_PRIVACY;
720
721         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
722             ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
723                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
724
725         if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
726                 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
727
728         mgmt = skb_put_zero(skb, 24);
729         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
730         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
731         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
732
733         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
734                 skb_put(skb, 10);
735                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
736                                                   IEEE80211_STYPE_REASSOC_REQ);
737                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
738                 mgmt->u.reassoc_req.listen_interval =
739                                 cpu_to_le16(local->hw.conf.listen_interval);
740                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
741                        ETH_ALEN);
742         } else {
743                 skb_put(skb, 4);
744                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
745                                                   IEEE80211_STYPE_ASSOC_REQ);
746                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
747                 mgmt->u.assoc_req.listen_interval =
748                                 cpu_to_le16(local->hw.conf.listen_interval);
749         }
750
751         /* SSID */
752         pos = skb_put(skb, 2 + assoc_data->ssid_len);
753         ie_start = pos;
754         *pos++ = WLAN_EID_SSID;
755         *pos++ = assoc_data->ssid_len;
756         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
757
758         /* add all rates which were marked to be used above */
759         supp_rates_len = rates_len;
760         if (supp_rates_len > 8)
761                 supp_rates_len = 8;
762
763         pos = skb_put(skb, supp_rates_len + 2);
764         *pos++ = WLAN_EID_SUPP_RATES;
765         *pos++ = supp_rates_len;
766
767         count = 0;
768         for (i = 0; i < sband->n_bitrates; i++) {
769                 if (BIT(i) & rates) {
770                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
771                                                 5 * (1 << shift));
772                         *pos++ = (u8) rate;
773                         if (++count == 8)
774                                 break;
775                 }
776         }
777
778         if (rates_len > count) {
779                 pos = skb_put(skb, rates_len - count + 2);
780                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
781                 *pos++ = rates_len - count;
782
783                 for (i++; i < sband->n_bitrates; i++) {
784                         if (BIT(i) & rates) {
785                                 int rate;
786                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
787                                                     5 * (1 << shift));
788                                 *pos++ = (u8) rate;
789                         }
790                 }
791         }
792
793         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
794             capab & WLAN_CAPABILITY_RADIO_MEASURE) {
795                 pos = skb_put(skb, 4);
796                 *pos++ = WLAN_EID_PWR_CAPABILITY;
797                 *pos++ = 2;
798                 *pos++ = 0; /* min tx power */
799                  /* max tx power */
800                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
801         }
802
803         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
804                 /* TODO: get this in reg domain format */
805                 pos = skb_put(skb, 2 * sband->n_channels + 2);
806                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
807                 *pos++ = 2 * sband->n_channels;
808                 for (i = 0; i < sband->n_channels; i++) {
809                         *pos++ = ieee80211_frequency_to_channel(
810                                         sband->channels[i].center_freq);
811                         *pos++ = 1; /* one channel in the subband*/
812                 }
813         }
814
815         /* Set MBSSID support for HE AP if needed */
816         if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) &&
817             !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len) {
818                 struct element *elem;
819
820                 /* we know it's writable, cast away the const */
821                 elem = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
822                                                   assoc_data->ie,
823                                                   assoc_data->ie_len);
824
825                 /* We can probably assume both always true */
826                 if (elem && elem->datalen >= 3)
827                         elem->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
828         }
829
830         /* if present, add any custom IEs that go before HT */
831         if (assoc_data->ie_len) {
832                 static const u8 before_ht[] = {
833                         WLAN_EID_SSID,
834                         WLAN_EID_SUPP_RATES,
835                         WLAN_EID_EXT_SUPP_RATES,
836                         WLAN_EID_PWR_CAPABILITY,
837                         WLAN_EID_SUPPORTED_CHANNELS,
838                         WLAN_EID_RSN,
839                         WLAN_EID_QOS_CAPA,
840                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
841                         WLAN_EID_MOBILITY_DOMAIN,
842                         WLAN_EID_FAST_BSS_TRANSITION,   /* reassoc only */
843                         WLAN_EID_RIC_DATA,              /* reassoc only */
844                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
845                 };
846                 static const u8 after_ric[] = {
847                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
848                         WLAN_EID_HT_CAPABILITY,
849                         WLAN_EID_BSS_COEX_2040,
850                         /* luckily this is almost always there */
851                         WLAN_EID_EXT_CAPABILITY,
852                         WLAN_EID_QOS_TRAFFIC_CAPA,
853                         WLAN_EID_TIM_BCAST_REQ,
854                         WLAN_EID_INTERWORKING,
855                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
856                         WLAN_EID_VHT_CAPABILITY,
857                         WLAN_EID_OPMODE_NOTIF,
858                 };
859
860                 noffset = ieee80211_ie_split_ric(assoc_data->ie,
861                                                  assoc_data->ie_len,
862                                                  before_ht,
863                                                  ARRAY_SIZE(before_ht),
864                                                  after_ric,
865                                                  ARRAY_SIZE(after_ric),
866                                                  offset);
867                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
868                 offset = noffset;
869         }
870
871         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
872                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
873                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
874
875         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
876                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
877                                     sband, chan, sdata->smps_mode);
878
879         /* if present, add any custom IEs that go before VHT */
880         if (assoc_data->ie_len) {
881                 static const u8 before_vht[] = {
882                         /*
883                          * no need to list the ones split off before HT
884                          * or generated here
885                          */
886                         WLAN_EID_BSS_COEX_2040,
887                         WLAN_EID_EXT_CAPABILITY,
888                         WLAN_EID_QOS_TRAFFIC_CAPA,
889                         WLAN_EID_TIM_BCAST_REQ,
890                         WLAN_EID_INTERWORKING,
891                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
892                 };
893
894                 /* RIC already taken above, so no need to handle here anymore */
895                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
896                                              before_vht, ARRAY_SIZE(before_vht),
897                                              offset);
898                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
899                 offset = noffset;
900         }
901
902         /* if present, add any custom IEs that go before HE */
903         if (assoc_data->ie_len) {
904                 static const u8 before_he[] = {
905                         /*
906                          * no need to list the ones split off before VHT
907                          * or generated here
908                          */
909                         WLAN_EID_OPMODE_NOTIF,
910                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
911                         /* 11ai elements */
912                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
913                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
914                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
915                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
916                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
917                         /* TODO: add 11ah/11aj/11ak elements */
918                 };
919
920                 /* RIC already taken above, so no need to handle here anymore */
921                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
922                                              before_he, ARRAY_SIZE(before_he),
923                                              offset);
924                 pos = skb_put(skb, noffset - offset);
925                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
926                 offset = noffset;
927         }
928
929         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
930                 ieee80211_add_vht_ie(sdata, skb, sband,
931                                      &assoc_data->ap_vht_cap);
932
933         /*
934          * If AP doesn't support HT, mark HE as disabled.
935          * If on the 5GHz band, make sure it supports VHT.
936          */
937         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT ||
938             (sband->band == NL80211_BAND_5GHZ &&
939              ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
940                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
941
942         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
943                 ieee80211_add_he_ie(sdata, skb, sband);
944
945         /* if present, add any custom non-vendor IEs that go after HE */
946         if (assoc_data->ie_len) {
947                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
948                                                     assoc_data->ie_len,
949                                                     offset);
950                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
951                 offset = noffset;
952         }
953
954         if (assoc_data->wmm) {
955                 if (assoc_data->uapsd) {
956                         qos_info = ifmgd->uapsd_queues;
957                         qos_info |= (ifmgd->uapsd_max_sp_len <<
958                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
959                 } else {
960                         qos_info = 0;
961                 }
962
963                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
964         }
965
966         /* add any remaining custom (i.e. vendor specific here) IEs */
967         if (assoc_data->ie_len) {
968                 noffset = assoc_data->ie_len;
969                 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
970         }
971
972         if (assoc_data->fils_kek_len &&
973             fils_encrypt_assoc_req(skb, assoc_data) < 0) {
974                 dev_kfree_skb(skb);
975                 return;
976         }
977
978         pos = skb_tail_pointer(skb);
979         kfree(ifmgd->assoc_req_ies);
980         ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC);
981         ifmgd->assoc_req_ies_len = pos - ie_start;
982
983         drv_mgd_prepare_tx(local, sdata, 0);
984
985         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
986         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
987                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
988                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
989         ieee80211_tx_skb(sdata, skb);
990 }
991
992 void ieee80211_send_pspoll(struct ieee80211_local *local,
993                            struct ieee80211_sub_if_data *sdata)
994 {
995         struct ieee80211_pspoll *pspoll;
996         struct sk_buff *skb;
997
998         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
999         if (!skb)
1000                 return;
1001
1002         pspoll = (struct ieee80211_pspoll *) skb->data;
1003         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1004
1005         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1006         ieee80211_tx_skb(sdata, skb);
1007 }
1008
1009 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1010                              struct ieee80211_sub_if_data *sdata,
1011                              bool powersave)
1012 {
1013         struct sk_buff *skb;
1014         struct ieee80211_hdr_3addr *nullfunc;
1015         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1016
1017         /* Don't send NDPs when STA is connected HE */
1018         if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1019             !(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
1020                 return;
1021
1022         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
1023                 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
1024         if (!skb)
1025                 return;
1026
1027         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
1028         if (powersave)
1029                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1030
1031         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1032                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1033
1034         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1035                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
1036
1037         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1038                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1039
1040         ieee80211_tx_skb(sdata, skb);
1041 }
1042
1043 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
1044                                           struct ieee80211_sub_if_data *sdata)
1045 {
1046         struct sk_buff *skb;
1047         struct ieee80211_hdr *nullfunc;
1048         __le16 fc;
1049
1050         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1051                 return;
1052
1053         /* Don't send NDPs when connected HE */
1054         if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE))
1055                 return;
1056
1057         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1058         if (!skb)
1059                 return;
1060
1061         skb_reserve(skb, local->hw.extra_tx_headroom);
1062
1063         nullfunc = skb_put_zero(skb, 30);
1064         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
1065                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1066         nullfunc->frame_control = fc;
1067         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
1068         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1069         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
1070         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
1071
1072         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1073         ieee80211_tx_skb(sdata, skb);
1074 }
1075
1076 /* spectrum management related things */
1077 static void ieee80211_chswitch_work(struct work_struct *work)
1078 {
1079         struct ieee80211_sub_if_data *sdata =
1080                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
1081         struct ieee80211_local *local = sdata->local;
1082         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1083         int ret;
1084
1085         if (!ieee80211_sdata_running(sdata))
1086                 return;
1087
1088         sdata_lock(sdata);
1089         mutex_lock(&local->mtx);
1090         mutex_lock(&local->chanctx_mtx);
1091
1092         if (!ifmgd->associated)
1093                 goto out;
1094
1095         if (!sdata->vif.csa_active)
1096                 goto out;
1097
1098         /*
1099          * using reservation isn't immediate as it may be deferred until later
1100          * with multi-vif. once reservation is complete it will re-schedule the
1101          * work with no reserved_chanctx so verify chandef to check if it
1102          * completed successfully
1103          */
1104
1105         if (sdata->reserved_chanctx) {
1106                 struct ieee80211_supported_band *sband = NULL;
1107                 struct sta_info *mgd_sta = NULL;
1108                 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;
1109
1110                 /*
1111                  * with multi-vif csa driver may call ieee80211_csa_finish()
1112                  * many times while waiting for other interfaces to use their
1113                  * reservations
1114                  */
1115                 if (sdata->reserved_ready)
1116                         goto out;
1117
1118                 if (sdata->vif.bss_conf.chandef.width !=
1119                     sdata->csa_chandef.width) {
1120                         /*
1121                          * For managed interface, we need to also update the AP
1122                          * station bandwidth and align the rate scale algorithm
1123                          * on the bandwidth change. Here we only consider the
1124                          * bandwidth of the new channel definition (as channel
1125                          * switch flow does not have the full HT/VHT/HE
1126                          * information), assuming that if additional changes are
1127                          * required they would be done as part of the processing
1128                          * of the next beacon from the AP.
1129                          */
1130                         switch (sdata->csa_chandef.width) {
1131                         case NL80211_CHAN_WIDTH_20_NOHT:
1132                         case NL80211_CHAN_WIDTH_20:
1133                         default:
1134                                 bw = IEEE80211_STA_RX_BW_20;
1135                                 break;
1136                         case NL80211_CHAN_WIDTH_40:
1137                                 bw = IEEE80211_STA_RX_BW_40;
1138                                 break;
1139                         case NL80211_CHAN_WIDTH_80:
1140                                 bw = IEEE80211_STA_RX_BW_80;
1141                                 break;
1142                         case NL80211_CHAN_WIDTH_80P80:
1143                         case NL80211_CHAN_WIDTH_160:
1144                                 bw = IEEE80211_STA_RX_BW_160;
1145                                 break;
1146                         }
1147
1148                         mgd_sta = sta_info_get(sdata, ifmgd->bssid);
1149                         sband =
1150                                 local->hw.wiphy->bands[sdata->csa_chandef.chan->band];
1151                 }
1152
1153                 if (sdata->vif.bss_conf.chandef.width >
1154                     sdata->csa_chandef.width) {
1155                         mgd_sta->sta.bandwidth = bw;
1156                         rate_control_rate_update(local, sband, mgd_sta,
1157                                                  IEEE80211_RC_BW_CHANGED);
1158                 }
1159
1160                 ret = ieee80211_vif_use_reserved_context(sdata);
1161                 if (ret) {
1162                         sdata_info(sdata,
1163                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
1164                                    ret);
1165                         ieee80211_queue_work(&sdata->local->hw,
1166                                              &ifmgd->csa_connection_drop_work);
1167                         goto out;
1168                 }
1169
1170                 if (sdata->vif.bss_conf.chandef.width <
1171                     sdata->csa_chandef.width) {
1172                         mgd_sta->sta.bandwidth = bw;
1173                         rate_control_rate_update(local, sband, mgd_sta,
1174                                                  IEEE80211_RC_BW_CHANGED);
1175                 }
1176
1177                 goto out;
1178         }
1179
1180         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1181                                         &sdata->csa_chandef)) {
1182                 sdata_info(sdata,
1183                            "failed to finalize channel switch, disconnecting\n");
1184                 ieee80211_queue_work(&sdata->local->hw,
1185                                      &ifmgd->csa_connection_drop_work);
1186                 goto out;
1187         }
1188
1189         ifmgd->csa_waiting_bcn = true;
1190
1191         ieee80211_sta_reset_beacon_monitor(sdata);
1192         ieee80211_sta_reset_conn_monitor(sdata);
1193
1194 out:
1195         mutex_unlock(&local->chanctx_mtx);
1196         mutex_unlock(&local->mtx);
1197         sdata_unlock(sdata);
1198 }
1199
1200 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1201 {
1202         struct ieee80211_local *local = sdata->local;
1203         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1204         int ret;
1205
1206         sdata_assert_lock(sdata);
1207
1208         WARN_ON(!sdata->vif.csa_active);
1209
1210         if (sdata->csa_block_tx) {
1211                 ieee80211_wake_vif_queues(local, sdata,
1212                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1213                 sdata->csa_block_tx = false;
1214         }
1215
1216         sdata->vif.csa_active = false;
1217         ifmgd->csa_waiting_bcn = false;
1218
1219         ret = drv_post_channel_switch(sdata);
1220         if (ret) {
1221                 sdata_info(sdata,
1222                            "driver post channel switch failed, disconnecting\n");
1223                 ieee80211_queue_work(&local->hw,
1224                                      &ifmgd->csa_connection_drop_work);
1225                 return;
1226         }
1227
1228         cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1229 }
1230
1231 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1232 {
1233         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1234         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1235
1236         trace_api_chswitch_done(sdata, success);
1237         if (!success) {
1238                 sdata_info(sdata,
1239                            "driver channel switch failed, disconnecting\n");
1240                 ieee80211_queue_work(&sdata->local->hw,
1241                                      &ifmgd->csa_connection_drop_work);
1242         } else {
1243                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1244         }
1245 }
1246 EXPORT_SYMBOL(ieee80211_chswitch_done);
1247
1248 static void ieee80211_chswitch_timer(struct timer_list *t)
1249 {
1250         struct ieee80211_sub_if_data *sdata =
1251                 from_timer(sdata, t, u.mgd.chswitch_timer);
1252
1253         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1254 }
1255
1256 static void
1257 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata)
1258 {
1259         struct ieee80211_local *local = sdata->local;
1260
1261         if (!local->ops->abort_channel_switch)
1262                 return;
1263
1264         mutex_lock(&local->mtx);
1265
1266         mutex_lock(&local->chanctx_mtx);
1267         ieee80211_vif_unreserve_chanctx(sdata);
1268         mutex_unlock(&local->chanctx_mtx);
1269
1270         if (sdata->csa_block_tx)
1271                 ieee80211_wake_vif_queues(local, sdata,
1272                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1273
1274         sdata->csa_block_tx = false;
1275         sdata->vif.csa_active = false;
1276
1277         mutex_unlock(&local->mtx);
1278
1279         drv_abort_channel_switch(sdata);
1280 }
1281
1282 static void
1283 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1284                                  u64 timestamp, u32 device_timestamp,
1285                                  struct ieee802_11_elems *elems,
1286                                  bool beacon)
1287 {
1288         struct ieee80211_local *local = sdata->local;
1289         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1290         struct cfg80211_bss *cbss = ifmgd->associated;
1291         struct ieee80211_chanctx_conf *conf;
1292         struct ieee80211_chanctx *chanctx;
1293         enum nl80211_band current_band;
1294         struct ieee80211_csa_ie csa_ie;
1295         struct ieee80211_channel_switch ch_switch;
1296         int res;
1297
1298         sdata_assert_lock(sdata);
1299
1300         if (!cbss)
1301                 return;
1302
1303         if (local->scanning)
1304                 return;
1305
1306         current_band = cbss->channel->band;
1307         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1308                                            ifmgd->flags,
1309                                            ifmgd->associated->bssid, &csa_ie);
1310
1311         if (!res) {
1312                 ch_switch.timestamp = timestamp;
1313                 ch_switch.device_timestamp = device_timestamp;
1314                 ch_switch.block_tx = csa_ie.mode;
1315                 ch_switch.chandef = csa_ie.chandef;
1316                 ch_switch.count = csa_ie.count;
1317                 ch_switch.delay = csa_ie.max_switch_time;
1318         }
1319
1320         if (res < 0) {
1321                 ieee80211_queue_work(&local->hw,
1322                                      &ifmgd->csa_connection_drop_work);
1323                 return;
1324         }
1325
1326         if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) {
1327                 if (res)
1328                         ieee80211_sta_abort_chanswitch(sdata);
1329                 else
1330                         drv_channel_switch_rx_beacon(sdata, &ch_switch);
1331                 return;
1332         } else if (sdata->vif.csa_active || res) {
1333                 /* disregard subsequent announcements if already processing */
1334                 return;
1335         }
1336
1337         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1338                                      IEEE80211_CHAN_DISABLED)) {
1339                 sdata_info(sdata,
1340                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1341                            ifmgd->associated->bssid,
1342                            csa_ie.chandef.chan->center_freq,
1343                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1344                            csa_ie.chandef.center_freq2);
1345                 ieee80211_queue_work(&local->hw,
1346                                      &ifmgd->csa_connection_drop_work);
1347                 return;
1348         }
1349
1350         if (cfg80211_chandef_identical(&csa_ie.chandef,
1351                                        &sdata->vif.bss_conf.chandef) &&
1352             (!csa_ie.mode || !beacon)) {
1353                 if (ifmgd->csa_ignored_same_chan)
1354                         return;
1355                 sdata_info(sdata,
1356                            "AP %pM tries to chanswitch to same channel, ignore\n",
1357                            ifmgd->associated->bssid);
1358                 ifmgd->csa_ignored_same_chan = true;
1359                 return;
1360         }
1361
1362         /*
1363          * Drop all TDLS peers - either we disconnect or move to a different
1364          * channel from this point on. There's no telling what our peer will do.
1365          * The TDLS WIDER_BW scenario is also problematic, as peers might now
1366          * have an incompatible wider chandef.
1367          */
1368         ieee80211_teardown_tdls_peers(sdata);
1369
1370         mutex_lock(&local->mtx);
1371         mutex_lock(&local->chanctx_mtx);
1372         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1373                                          lockdep_is_held(&local->chanctx_mtx));
1374         if (!conf) {
1375                 sdata_info(sdata,
1376                            "no channel context assigned to vif?, disconnecting\n");
1377                 goto drop_connection;
1378         }
1379
1380         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1381
1382         if (local->use_chanctx &&
1383             !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1384                 sdata_info(sdata,
1385                            "driver doesn't support chan-switch with channel contexts\n");
1386                 goto drop_connection;
1387         }
1388
1389         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1390                 sdata_info(sdata,
1391                            "preparing for channel switch failed, disconnecting\n");
1392                 goto drop_connection;
1393         }
1394
1395         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1396                                             chanctx->mode, false);
1397         if (res) {
1398                 sdata_info(sdata,
1399                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1400                            res);
1401                 goto drop_connection;
1402         }
1403         mutex_unlock(&local->chanctx_mtx);
1404
1405         sdata->vif.csa_active = true;
1406         sdata->csa_chandef = csa_ie.chandef;
1407         sdata->csa_block_tx = csa_ie.mode;
1408         ifmgd->csa_ignored_same_chan = false;
1409
1410         if (sdata->csa_block_tx)
1411                 ieee80211_stop_vif_queues(local, sdata,
1412                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1413         mutex_unlock(&local->mtx);
1414
1415         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1416                                           csa_ie.count);
1417
1418         if (local->ops->channel_switch) {
1419                 /* use driver's channel switch callback */
1420                 drv_channel_switch(local, sdata, &ch_switch);
1421                 return;
1422         }
1423
1424         /* channel switch handled in software */
1425         if (csa_ie.count <= 1)
1426                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1427         else
1428                 mod_timer(&ifmgd->chswitch_timer,
1429                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1430                                          cbss->beacon_interval));
1431         return;
1432  drop_connection:
1433         /*
1434          * This is just so that the disconnect flow will know that
1435          * we were trying to switch channel and failed. In case the
1436          * mode is 1 (we are not allowed to Tx), we will know not to
1437          * send a deauthentication frame. Those two fields will be
1438          * reset when the disconnection worker runs.
1439          */
1440         sdata->vif.csa_active = true;
1441         sdata->csa_block_tx = csa_ie.mode;
1442
1443         ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1444         mutex_unlock(&local->chanctx_mtx);
1445         mutex_unlock(&local->mtx);
1446 }
1447
1448 static bool
1449 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1450                                  struct ieee80211_channel *channel,
1451                                  const u8 *country_ie, u8 country_ie_len,
1452                                  const u8 *pwr_constr_elem,
1453                                  int *chan_pwr, int *pwr_reduction)
1454 {
1455         struct ieee80211_country_ie_triplet *triplet;
1456         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1457         int i, chan_increment;
1458         bool have_chan_pwr = false;
1459
1460         /* Invalid IE */
1461         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1462                 return false;
1463
1464         triplet = (void *)(country_ie + 3);
1465         country_ie_len -= 3;
1466
1467         switch (channel->band) {
1468         default:
1469                 WARN_ON_ONCE(1);
1470                 /* fall through */
1471         case NL80211_BAND_2GHZ:
1472         case NL80211_BAND_60GHZ:
1473                 chan_increment = 1;
1474                 break;
1475         case NL80211_BAND_5GHZ:
1476                 chan_increment = 4;
1477                 break;
1478         }
1479
1480         /* find channel */
1481         while (country_ie_len >= 3) {
1482                 u8 first_channel = triplet->chans.first_channel;
1483
1484                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1485                         goto next;
1486
1487                 for (i = 0; i < triplet->chans.num_channels; i++) {
1488                         if (first_channel + i * chan_increment == chan) {
1489                                 have_chan_pwr = true;
1490                                 *chan_pwr = triplet->chans.max_power;
1491                                 break;
1492                         }
1493                 }
1494                 if (have_chan_pwr)
1495                         break;
1496
1497  next:
1498                 triplet++;
1499                 country_ie_len -= 3;
1500         }
1501
1502         if (have_chan_pwr && pwr_constr_elem)
1503                 *pwr_reduction = *pwr_constr_elem;
1504         else
1505                 *pwr_reduction = 0;
1506
1507         return have_chan_pwr;
1508 }
1509
1510 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1511                                       struct ieee80211_channel *channel,
1512                                       const u8 *cisco_dtpc_ie,
1513                                       int *pwr_level)
1514 {
1515         /* From practical testing, the first data byte of the DTPC element
1516          * seems to contain the requested dBm level, and the CLI on Cisco
1517          * APs clearly state the range is -127 to 127 dBm, which indicates
1518          * a signed byte, although it seemingly never actually goes negative.
1519          * The other byte seems to always be zero.
1520          */
1521         *pwr_level = (__s8)cisco_dtpc_ie[4];
1522 }
1523
1524 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1525                                        struct ieee80211_channel *channel,
1526                                        struct ieee80211_mgmt *mgmt,
1527                                        const u8 *country_ie, u8 country_ie_len,
1528                                        const u8 *pwr_constr_ie,
1529                                        const u8 *cisco_dtpc_ie)
1530 {
1531         bool has_80211h_pwr = false, has_cisco_pwr = false;
1532         int chan_pwr = 0, pwr_reduction_80211h = 0;
1533         int pwr_level_cisco, pwr_level_80211h;
1534         int new_ap_level;
1535         __le16 capab = mgmt->u.probe_resp.capab_info;
1536
1537         if (country_ie &&
1538             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1539              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1540                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1541                         sdata, channel, country_ie, country_ie_len,
1542                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1543                 pwr_level_80211h =
1544                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1545         }
1546
1547         if (cisco_dtpc_ie) {
1548                 ieee80211_find_cisco_dtpc(
1549                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1550                 has_cisco_pwr = true;
1551         }
1552
1553         if (!has_80211h_pwr && !has_cisco_pwr)
1554                 return 0;
1555
1556         /* If we have both 802.11h and Cisco DTPC, apply both limits
1557          * by picking the smallest of the two power levels advertised.
1558          */
1559         if (has_80211h_pwr &&
1560             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1561                 new_ap_level = pwr_level_80211h;
1562
1563                 if (sdata->ap_power_level == new_ap_level)
1564                         return 0;
1565
1566                 sdata_dbg(sdata,
1567                           "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1568                           pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1569                           sdata->u.mgd.bssid);
1570         } else {  /* has_cisco_pwr is always true here. */
1571                 new_ap_level = pwr_level_cisco;
1572
1573                 if (sdata->ap_power_level == new_ap_level)
1574                         return 0;
1575
1576                 sdata_dbg(sdata,
1577                           "Limiting TX power to %d dBm as advertised by %pM\n",
1578                           pwr_level_cisco, sdata->u.mgd.bssid);
1579         }
1580
1581         sdata->ap_power_level = new_ap_level;
1582         if (__ieee80211_recalc_txpower(sdata))
1583                 return BSS_CHANGED_TXPOWER;
1584         return 0;
1585 }
1586
1587 /* powersave */
1588 static void ieee80211_enable_ps(struct ieee80211_local *local,
1589                                 struct ieee80211_sub_if_data *sdata)
1590 {
1591         struct ieee80211_conf *conf = &local->hw.conf;
1592
1593         /*
1594          * If we are scanning right now then the parameters will
1595          * take effect when scan finishes.
1596          */
1597         if (local->scanning)
1598                 return;
1599
1600         if (conf->dynamic_ps_timeout > 0 &&
1601             !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1602                 mod_timer(&local->dynamic_ps_timer, jiffies +
1603                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1604         } else {
1605                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1606                         ieee80211_send_nullfunc(local, sdata, true);
1607
1608                 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1609                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1610                         return;
1611
1612                 conf->flags |= IEEE80211_CONF_PS;
1613                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1614         }
1615 }
1616
1617 static void ieee80211_change_ps(struct ieee80211_local *local)
1618 {
1619         struct ieee80211_conf *conf = &local->hw.conf;
1620
1621         if (local->ps_sdata) {
1622                 ieee80211_enable_ps(local, local->ps_sdata);
1623         } else if (conf->flags & IEEE80211_CONF_PS) {
1624                 conf->flags &= ~IEEE80211_CONF_PS;
1625                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1626                 del_timer_sync(&local->dynamic_ps_timer);
1627                 cancel_work_sync(&local->dynamic_ps_enable_work);
1628         }
1629 }
1630
1631 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1632 {
1633         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1634         struct sta_info *sta = NULL;
1635         bool authorized = false;
1636
1637         if (!mgd->powersave)
1638                 return false;
1639
1640         if (mgd->broken_ap)
1641                 return false;
1642
1643         if (!mgd->associated)
1644                 return false;
1645
1646         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1647                 return false;
1648
1649         if (!mgd->have_beacon)
1650                 return false;
1651
1652         rcu_read_lock();
1653         sta = sta_info_get(sdata, mgd->bssid);
1654         if (sta)
1655                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1656         rcu_read_unlock();
1657
1658         return authorized;
1659 }
1660
1661 /* need to hold RTNL or interface lock */
1662 void ieee80211_recalc_ps(struct ieee80211_local *local)
1663 {
1664         struct ieee80211_sub_if_data *sdata, *found = NULL;
1665         int count = 0;
1666         int timeout;
1667
1668         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1669                 local->ps_sdata = NULL;
1670                 return;
1671         }
1672
1673         list_for_each_entry(sdata, &local->interfaces, list) {
1674                 if (!ieee80211_sdata_running(sdata))
1675                         continue;
1676                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1677                         /* If an AP vif is found, then disable PS
1678                          * by setting the count to zero thereby setting
1679                          * ps_sdata to NULL.
1680                          */
1681                         count = 0;
1682                         break;
1683                 }
1684                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1685                         continue;
1686                 found = sdata;
1687                 count++;
1688         }
1689
1690         if (count == 1 && ieee80211_powersave_allowed(found)) {
1691                 u8 dtimper = found->u.mgd.dtim_period;
1692
1693                 timeout = local->dynamic_ps_forced_timeout;
1694                 if (timeout < 0)
1695                         timeout = 100;
1696                 local->hw.conf.dynamic_ps_timeout = timeout;
1697
1698                 /* If the TIM IE is invalid, pretend the value is 1 */
1699                 if (!dtimper)
1700                         dtimper = 1;
1701
1702                 local->hw.conf.ps_dtim_period = dtimper;
1703                 local->ps_sdata = found;
1704         } else {
1705                 local->ps_sdata = NULL;
1706         }
1707
1708         ieee80211_change_ps(local);
1709 }
1710
1711 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1712 {
1713         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1714
1715         if (sdata->vif.bss_conf.ps != ps_allowed) {
1716                 sdata->vif.bss_conf.ps = ps_allowed;
1717                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1718         }
1719 }
1720
1721 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1722 {
1723         struct ieee80211_local *local =
1724                 container_of(work, struct ieee80211_local,
1725                              dynamic_ps_disable_work);
1726
1727         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1728                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1729                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1730         }
1731
1732         ieee80211_wake_queues_by_reason(&local->hw,
1733                                         IEEE80211_MAX_QUEUE_MAP,
1734                                         IEEE80211_QUEUE_STOP_REASON_PS,
1735                                         false);
1736 }
1737
1738 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1739 {
1740         struct ieee80211_local *local =
1741                 container_of(work, struct ieee80211_local,
1742                              dynamic_ps_enable_work);
1743         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1744         struct ieee80211_if_managed *ifmgd;
1745         unsigned long flags;
1746         int q;
1747
1748         /* can only happen when PS was just disabled anyway */
1749         if (!sdata)
1750                 return;
1751
1752         ifmgd = &sdata->u.mgd;
1753
1754         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1755                 return;
1756
1757         if (local->hw.conf.dynamic_ps_timeout > 0) {
1758                 /* don't enter PS if TX frames are pending */
1759                 if (drv_tx_frames_pending(local)) {
1760                         mod_timer(&local->dynamic_ps_timer, jiffies +
1761                                   msecs_to_jiffies(
1762                                   local->hw.conf.dynamic_ps_timeout));
1763                         return;
1764                 }
1765
1766                 /*
1767                  * transmission can be stopped by others which leads to
1768                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1769                  * is not the actual idle state.
1770                  */
1771                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1772                 for (q = 0; q < local->hw.queues; q++) {
1773                         if (local->queue_stop_reasons[q]) {
1774                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1775                                                        flags);
1776                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1777                                           msecs_to_jiffies(
1778                                           local->hw.conf.dynamic_ps_timeout));
1779                                 return;
1780                         }
1781                 }
1782                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1783         }
1784
1785         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1786             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1787                 if (drv_tx_frames_pending(local)) {
1788                         mod_timer(&local->dynamic_ps_timer, jiffies +
1789                                   msecs_to_jiffies(
1790                                   local->hw.conf.dynamic_ps_timeout));
1791                 } else {
1792                         ieee80211_send_nullfunc(local, sdata, true);
1793                         /* Flush to get the tx status of nullfunc frame */
1794                         ieee80211_flush_queues(local, sdata, false);
1795                 }
1796         }
1797
1798         if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1799               ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1800             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1801                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1802                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1803                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1804         }
1805 }
1806
1807 void ieee80211_dynamic_ps_timer(struct timer_list *t)
1808 {
1809         struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1810
1811         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1812 }
1813
1814 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1815 {
1816         struct delayed_work *delayed_work = to_delayed_work(work);
1817         struct ieee80211_sub_if_data *sdata =
1818                 container_of(delayed_work, struct ieee80211_sub_if_data,
1819                              dfs_cac_timer_work);
1820         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1821
1822         mutex_lock(&sdata->local->mtx);
1823         if (sdata->wdev.cac_started) {
1824                 ieee80211_vif_release_channel(sdata);
1825                 cfg80211_cac_event(sdata->dev, &chandef,
1826                                    NL80211_RADAR_CAC_FINISHED,
1827                                    GFP_KERNEL);
1828         }
1829         mutex_unlock(&sdata->local->mtx);
1830 }
1831
1832 static bool
1833 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1834 {
1835         struct ieee80211_local *local = sdata->local;
1836         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1837         bool ret = false;
1838         int ac;
1839
1840         if (local->hw.queues < IEEE80211_NUM_ACS)
1841                 return false;
1842
1843         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1844                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1845                 int non_acm_ac;
1846                 unsigned long now = jiffies;
1847
1848                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1849                     tx_tspec->admitted_time &&
1850                     time_after(now, tx_tspec->time_slice_start + HZ)) {
1851                         tx_tspec->consumed_tx_time = 0;
1852                         tx_tspec->time_slice_start = now;
1853
1854                         if (tx_tspec->downgraded)
1855                                 tx_tspec->action =
1856                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
1857                 }
1858
1859                 switch (tx_tspec->action) {
1860                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1861                         /* take the original parameters */
1862                         if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1863                                 sdata_err(sdata,
1864                                           "failed to set TX queue parameters for queue %d\n",
1865                                           ac);
1866                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1867                         tx_tspec->downgraded = false;
1868                         ret = true;
1869                         break;
1870                 case TX_TSPEC_ACTION_DOWNGRADE:
1871                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1872                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1873                                 ret = true;
1874                                 break;
1875                         }
1876                         /* downgrade next lower non-ACM AC */
1877                         for (non_acm_ac = ac + 1;
1878                              non_acm_ac < IEEE80211_NUM_ACS;
1879                              non_acm_ac++)
1880                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1881                                         break;
1882                         /* Usually the loop will result in using BK even if it
1883                          * requires admission control, but such a configuration
1884                          * makes no sense and we have to transmit somehow - the
1885                          * AC selection does the same thing.
1886                          * If we started out trying to downgrade from BK, then
1887                          * the extra condition here might be needed.
1888                          */
1889                         if (non_acm_ac >= IEEE80211_NUM_ACS)
1890                                 non_acm_ac = IEEE80211_AC_BK;
1891                         if (drv_conf_tx(local, sdata, ac,
1892                                         &sdata->tx_conf[non_acm_ac]))
1893                                 sdata_err(sdata,
1894                                           "failed to set TX queue parameters for queue %d\n",
1895                                           ac);
1896                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1897                         ret = true;
1898                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
1899                                 tx_tspec->time_slice_start + HZ - now + 1);
1900                         break;
1901                 case TX_TSPEC_ACTION_NONE:
1902                         /* nothing now */
1903                         break;
1904                 }
1905         }
1906
1907         return ret;
1908 }
1909
1910 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1911 {
1912         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1913                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1914 }
1915
1916 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1917 {
1918         struct ieee80211_sub_if_data *sdata;
1919
1920         sdata = container_of(work, struct ieee80211_sub_if_data,
1921                              u.mgd.tx_tspec_wk.work);
1922         ieee80211_sta_handle_tspec_ac_params(sdata);
1923 }
1924
1925 /* MLME */
1926 static bool
1927 ieee80211_sta_wmm_params(struct ieee80211_local *local,
1928                          struct ieee80211_sub_if_data *sdata,
1929                          const u8 *wmm_param, size_t wmm_param_len,
1930                          const struct ieee80211_mu_edca_param_set *mu_edca)
1931 {
1932         struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1933         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1934         size_t left;
1935         int count, mu_edca_count, ac;
1936         const u8 *pos;
1937         u8 uapsd_queues = 0;
1938
1939         if (!local->ops->conf_tx)
1940                 return false;
1941
1942         if (local->hw.queues < IEEE80211_NUM_ACS)
1943                 return false;
1944
1945         if (!wmm_param)
1946                 return false;
1947
1948         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1949                 return false;
1950
1951         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1952                 uapsd_queues = ifmgd->uapsd_queues;
1953
1954         count = wmm_param[6] & 0x0f;
1955         /* -1 is the initial value of ifmgd->mu_edca_last_param_set.
1956          * if mu_edca was preset before and now it disappeared tell
1957          * the driver about it.
1958          */
1959         mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1;
1960         if (count == ifmgd->wmm_last_param_set &&
1961             mu_edca_count == ifmgd->mu_edca_last_param_set)
1962                 return false;
1963         ifmgd->wmm_last_param_set = count;
1964         ifmgd->mu_edca_last_param_set = mu_edca_count;
1965
1966         pos = wmm_param + 8;
1967         left = wmm_param_len - 8;
1968
1969         memset(&params, 0, sizeof(params));
1970
1971         sdata->wmm_acm = 0;
1972         for (; left >= 4; left -= 4, pos += 4) {
1973                 int aci = (pos[0] >> 5) & 0x03;
1974                 int acm = (pos[0] >> 4) & 0x01;
1975                 bool uapsd = false;
1976
1977                 switch (aci) {
1978                 case 1: /* AC_BK */
1979                         ac = IEEE80211_AC_BK;
1980                         if (acm)
1981                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1982                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1983                                 uapsd = true;
1984                         params[ac].mu_edca = !!mu_edca;
1985                         if (mu_edca)
1986                                 params[ac].mu_edca_param_rec = mu_edca->ac_bk;
1987                         break;
1988                 case 2: /* AC_VI */
1989                         ac = IEEE80211_AC_VI;
1990                         if (acm)
1991                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1992                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1993                                 uapsd = true;
1994                         params[ac].mu_edca = !!mu_edca;
1995                         if (mu_edca)
1996                                 params[ac].mu_edca_param_rec = mu_edca->ac_vi;
1997                         break;
1998                 case 3: /* AC_VO */
1999                         ac = IEEE80211_AC_VO;
2000                         if (acm)
2001                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
2002                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
2003                                 uapsd = true;
2004                         params[ac].mu_edca = !!mu_edca;
2005                         if (mu_edca)
2006                                 params[ac].mu_edca_param_rec = mu_edca->ac_vo;
2007                         break;
2008                 case 0: /* AC_BE */
2009                 default:
2010                         ac = IEEE80211_AC_BE;
2011                         if (acm)
2012                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
2013                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
2014                                 uapsd = true;
2015                         params[ac].mu_edca = !!mu_edca;
2016                         if (mu_edca)
2017                                 params[ac].mu_edca_param_rec = mu_edca->ac_be;
2018                         break;
2019                 }
2020
2021                 params[ac].aifs = pos[0] & 0x0f;
2022
2023                 if (params[ac].aifs < 2) {
2024                         sdata_info(sdata,
2025                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
2026                                    params[ac].aifs, aci);
2027                         params[ac].aifs = 2;
2028                 }
2029                 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
2030                 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
2031                 params[ac].txop = get_unaligned_le16(pos + 2);
2032                 params[ac].acm = acm;
2033                 params[ac].uapsd = uapsd;
2034
2035                 if (params[ac].cw_min == 0 ||
2036                     params[ac].cw_min > params[ac].cw_max) {
2037                         sdata_info(sdata,
2038                                    "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
2039                                    params[ac].cw_min, params[ac].cw_max, aci);
2040                         return false;
2041                 }
2042                 ieee80211_regulatory_limit_wmm_params(sdata, &params[ac], ac);
2043         }
2044
2045         /* WMM specification requires all 4 ACIs. */
2046         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2047                 if (params[ac].cw_min == 0) {
2048                         sdata_info(sdata,
2049                                    "AP has invalid WMM params (missing AC %d), using defaults\n",
2050                                    ac);
2051                         return false;
2052                 }
2053         }
2054
2055         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2056                 mlme_dbg(sdata,
2057                          "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
2058                          ac, params[ac].acm,
2059                          params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
2060                          params[ac].txop, params[ac].uapsd,
2061                          ifmgd->tx_tspec[ac].downgraded);
2062                 sdata->tx_conf[ac] = params[ac];
2063                 if (!ifmgd->tx_tspec[ac].downgraded &&
2064                     drv_conf_tx(local, sdata, ac, &params[ac]))
2065                         sdata_err(sdata,
2066                                   "failed to set TX queue parameters for AC %d\n",
2067                                   ac);
2068         }
2069
2070         /* enable WMM or activate new settings */
2071         sdata->vif.bss_conf.qos = true;
2072         return true;
2073 }
2074
2075 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2076 {
2077         lockdep_assert_held(&sdata->local->mtx);
2078
2079         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2080         ieee80211_run_deferred_scan(sdata->local);
2081 }
2082
2083 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2084 {
2085         mutex_lock(&sdata->local->mtx);
2086         __ieee80211_stop_poll(sdata);
2087         mutex_unlock(&sdata->local->mtx);
2088 }
2089
2090 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
2091                                            u16 capab, bool erp_valid, u8 erp)
2092 {
2093         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2094         struct ieee80211_supported_band *sband;
2095         u32 changed = 0;
2096         bool use_protection;
2097         bool use_short_preamble;
2098         bool use_short_slot;
2099
2100         sband = ieee80211_get_sband(sdata);
2101         if (!sband)
2102                 return changed;
2103
2104         if (erp_valid) {
2105                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
2106                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
2107         } else {
2108                 use_protection = false;
2109                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
2110         }
2111
2112         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
2113         if (sband->band == NL80211_BAND_5GHZ)
2114                 use_short_slot = true;
2115
2116         if (use_protection != bss_conf->use_cts_prot) {
2117                 bss_conf->use_cts_prot = use_protection;
2118                 changed |= BSS_CHANGED_ERP_CTS_PROT;
2119         }
2120
2121         if (use_short_preamble != bss_conf->use_short_preamble) {
2122                 bss_conf->use_short_preamble = use_short_preamble;
2123                 changed |= BSS_CHANGED_ERP_PREAMBLE;
2124         }
2125
2126         if (use_short_slot != bss_conf->use_short_slot) {
2127                 bss_conf->use_short_slot = use_short_slot;
2128                 changed |= BSS_CHANGED_ERP_SLOT;
2129         }
2130
2131         return changed;
2132 }
2133
2134 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2135                                      struct cfg80211_bss *cbss,
2136                                      u32 bss_info_changed)
2137 {
2138         struct ieee80211_bss *bss = (void *)cbss->priv;
2139         struct ieee80211_local *local = sdata->local;
2140         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2141
2142         bss_info_changed |= BSS_CHANGED_ASSOC;
2143         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
2144                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
2145
2146         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
2147                 beacon_loss_count * bss_conf->beacon_int));
2148
2149         sdata->u.mgd.associated = cbss;
2150         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2151
2152         ieee80211_check_rate_mask(sdata);
2153
2154         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
2155
2156         if (sdata->vif.p2p ||
2157             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2158                 const struct cfg80211_bss_ies *ies;
2159
2160                 rcu_read_lock();
2161                 ies = rcu_dereference(cbss->ies);
2162                 if (ies) {
2163                         int ret;
2164
2165                         ret = cfg80211_get_p2p_attr(
2166                                         ies->data, ies->len,
2167                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2168                                         (u8 *) &bss_conf->p2p_noa_attr,
2169                                         sizeof(bss_conf->p2p_noa_attr));
2170                         if (ret >= 2) {
2171                                 sdata->u.mgd.p2p_noa_index =
2172                                         bss_conf->p2p_noa_attr.index;
2173                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
2174                         }
2175                 }
2176                 rcu_read_unlock();
2177         }
2178
2179         /* just to be sure */
2180         ieee80211_stop_poll(sdata);
2181
2182         ieee80211_led_assoc(local, 1);
2183
2184         if (sdata->u.mgd.have_beacon) {
2185                 /*
2186                  * If the AP is buggy we may get here with no DTIM period
2187                  * known, so assume it's 1 which is the only safe assumption
2188                  * in that case, although if the TIM IE is broken powersave
2189                  * probably just won't work at all.
2190                  */
2191                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
2192                 bss_conf->beacon_rate = bss->beacon_rate;
2193                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2194         } else {
2195                 bss_conf->beacon_rate = NULL;
2196                 bss_conf->dtim_period = 0;
2197         }
2198
2199         bss_conf->assoc = 1;
2200
2201         /* Tell the driver to monitor connection quality (if supported) */
2202         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2203             bss_conf->cqm_rssi_thold)
2204                 bss_info_changed |= BSS_CHANGED_CQM;
2205
2206         /* Enable ARP filtering */
2207         if (bss_conf->arp_addr_cnt)
2208                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
2209
2210         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2211
2212         mutex_lock(&local->iflist_mtx);
2213         ieee80211_recalc_ps(local);
2214         mutex_unlock(&local->iflist_mtx);
2215
2216         ieee80211_recalc_smps(sdata);
2217         ieee80211_recalc_ps_vif(sdata);
2218
2219         netif_carrier_on(sdata->dev);
2220 }
2221
2222 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2223                                    u16 stype, u16 reason, bool tx,
2224                                    u8 *frame_buf)
2225 {
2226         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2227         struct ieee80211_local *local = sdata->local;
2228         u32 changed = 0;
2229
2230         sdata_assert_lock(sdata);
2231
2232         if (WARN_ON_ONCE(tx && !frame_buf))
2233                 return;
2234
2235         if (WARN_ON(!ifmgd->associated))
2236                 return;
2237
2238         ieee80211_stop_poll(sdata);
2239
2240         ifmgd->associated = NULL;
2241         netif_carrier_off(sdata->dev);
2242
2243         /*
2244          * if we want to get out of ps before disassoc (why?) we have
2245          * to do it before sending disassoc, as otherwise the null-packet
2246          * won't be valid.
2247          */
2248         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2249                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2250                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2251         }
2252         local->ps_sdata = NULL;
2253
2254         /* disable per-vif ps */
2255         ieee80211_recalc_ps_vif(sdata);
2256
2257         /* make sure ongoing transmission finishes */
2258         synchronize_net();
2259
2260         /*
2261          * drop any frame before deauth/disassoc, this can be data or
2262          * management frame. Since we are disconnecting, we should not
2263          * insist sending these frames which can take time and delay
2264          * the disconnection and possible the roaming.
2265          */
2266         if (tx)
2267                 ieee80211_flush_queues(local, sdata, true);
2268
2269         /* deauthenticate/disassociate now */
2270         if (tx || frame_buf) {
2271                 /*
2272                  * In multi channel scenarios guarantee that the virtual
2273                  * interface is granted immediate airtime to transmit the
2274                  * deauthentication frame by calling mgd_prepare_tx, if the
2275                  * driver requested so.
2276                  */
2277                 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
2278                     !ifmgd->have_beacon)
2279                         drv_mgd_prepare_tx(sdata->local, sdata, 0);
2280
2281                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid,
2282                                                ifmgd->bssid, stype, reason,
2283                                                tx, frame_buf);
2284         }
2285
2286         /* flush out frame - make sure the deauth was actually sent */
2287         if (tx)
2288                 ieee80211_flush_queues(local, sdata, false);
2289
2290         /* clear bssid only after building the needed mgmt frames */
2291         eth_zero_addr(ifmgd->bssid);
2292
2293         /* remove AP and TDLS peers */
2294         sta_info_flush(sdata);
2295
2296         /* finally reset all BSS / config parameters */
2297         changed |= ieee80211_reset_erp_info(sdata);
2298
2299         ieee80211_led_assoc(local, 0);
2300         changed |= BSS_CHANGED_ASSOC;
2301         sdata->vif.bss_conf.assoc = false;
2302
2303         ifmgd->p2p_noa_index = -1;
2304         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2305                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2306
2307         /* on the next assoc, re-program HT/VHT parameters */
2308         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2309         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2310         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2311         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2312
2313         /* reset MU-MIMO ownership and group data */
2314         memset(sdata->vif.bss_conf.mu_group.membership, 0,
2315                sizeof(sdata->vif.bss_conf.mu_group.membership));
2316         memset(sdata->vif.bss_conf.mu_group.position, 0,
2317                sizeof(sdata->vif.bss_conf.mu_group.position));
2318         changed |= BSS_CHANGED_MU_GROUPS;
2319         sdata->vif.mu_mimo_owner = false;
2320
2321         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2322
2323         del_timer_sync(&local->dynamic_ps_timer);
2324         cancel_work_sync(&local->dynamic_ps_enable_work);
2325
2326         /* Disable ARP filtering */
2327         if (sdata->vif.bss_conf.arp_addr_cnt)
2328                 changed |= BSS_CHANGED_ARP_FILTER;
2329
2330         sdata->vif.bss_conf.qos = false;
2331         changed |= BSS_CHANGED_QOS;
2332
2333         /* The BSSID (not really interesting) and HT changed */
2334         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2335         ieee80211_bss_info_change_notify(sdata, changed);
2336
2337         /* disassociated - set to defaults now */
2338         ieee80211_set_wmm_default(sdata, false, false);
2339
2340         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2341         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2342         del_timer_sync(&sdata->u.mgd.timer);
2343         del_timer_sync(&sdata->u.mgd.chswitch_timer);
2344
2345         sdata->vif.bss_conf.dtim_period = 0;
2346         sdata->vif.bss_conf.beacon_rate = NULL;
2347
2348         ifmgd->have_beacon = false;
2349
2350         ifmgd->flags = 0;
2351         mutex_lock(&local->mtx);
2352         ieee80211_vif_release_channel(sdata);
2353
2354         sdata->vif.csa_active = false;
2355         ifmgd->csa_waiting_bcn = false;
2356         ifmgd->csa_ignored_same_chan = false;
2357         if (sdata->csa_block_tx) {
2358                 ieee80211_wake_vif_queues(local, sdata,
2359                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2360                 sdata->csa_block_tx = false;
2361         }
2362         mutex_unlock(&local->mtx);
2363
2364         /* existing TX TSPEC sessions no longer exist */
2365         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2366         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2367
2368         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2369 }
2370
2371 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2372                              struct ieee80211_hdr *hdr)
2373 {
2374         /*
2375          * We can postpone the mgd.timer whenever receiving unicast frames
2376          * from AP because we know that the connection is working both ways
2377          * at that time. But multicast frames (and hence also beacons) must
2378          * be ignored here, because we need to trigger the timer during
2379          * data idle periods for sending the periodic probe request to the
2380          * AP we're connected to.
2381          */
2382         if (is_multicast_ether_addr(hdr->addr1))
2383                 return;
2384
2385         ieee80211_sta_reset_conn_monitor(sdata);
2386 }
2387
2388 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2389 {
2390         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2391         struct ieee80211_local *local = sdata->local;
2392
2393         mutex_lock(&local->mtx);
2394         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2395                 goto out;
2396
2397         __ieee80211_stop_poll(sdata);
2398
2399         mutex_lock(&local->iflist_mtx);
2400         ieee80211_recalc_ps(local);
2401         mutex_unlock(&local->iflist_mtx);
2402
2403         if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2404                 goto out;
2405
2406         /*
2407          * We've received a probe response, but are not sure whether
2408          * we have or will be receiving any beacons or data, so let's
2409          * schedule the timers again, just in case.
2410          */
2411         ieee80211_sta_reset_beacon_monitor(sdata);
2412
2413         mod_timer(&ifmgd->conn_mon_timer,
2414                   round_jiffies_up(jiffies +
2415                                    IEEE80211_CONNECTION_IDLE_TIME));
2416 out:
2417         mutex_unlock(&local->mtx);
2418 }
2419
2420 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2421                                            struct ieee80211_hdr *hdr,
2422                                            u16 tx_time)
2423 {
2424         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2425         u16 tid = ieee80211_get_tid(hdr);
2426         int ac = ieee80211_ac_from_tid(tid);
2427         struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2428         unsigned long now = jiffies;
2429
2430         if (likely(!tx_tspec->admitted_time))
2431                 return;
2432
2433         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2434                 tx_tspec->consumed_tx_time = 0;
2435                 tx_tspec->time_slice_start = now;
2436
2437                 if (tx_tspec->downgraded) {
2438                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2439                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2440                 }
2441         }
2442
2443         if (tx_tspec->downgraded)
2444                 return;
2445
2446         tx_tspec->consumed_tx_time += tx_time;
2447
2448         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2449                 tx_tspec->downgraded = true;
2450                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2451                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2452         }
2453 }
2454
2455 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2456                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2457 {
2458         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2459
2460         if (!ieee80211_is_data(hdr->frame_control))
2461             return;
2462
2463         if (ieee80211_is_nullfunc(hdr->frame_control) &&
2464             sdata->u.mgd.probe_send_count > 0) {
2465                 if (ack)
2466                         ieee80211_sta_reset_conn_monitor(sdata);
2467                 else
2468                         sdata->u.mgd.nullfunc_failed = true;
2469                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2470                 return;
2471         }
2472
2473         if (ack)
2474                 ieee80211_sta_reset_conn_monitor(sdata);
2475 }
2476
2477 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
2478                                           const u8 *src, const u8 *dst,
2479                                           const u8 *ssid, size_t ssid_len,
2480                                           struct ieee80211_channel *channel)
2481 {
2482         struct sk_buff *skb;
2483
2484         skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
2485                                         ssid, ssid_len, NULL, 0,
2486                                         IEEE80211_PROBE_FLAG_DIRECTED);
2487         if (skb)
2488                 ieee80211_tx_skb(sdata, skb);
2489 }
2490
2491 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2492 {
2493         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2494         const u8 *ssid;
2495         u8 *dst = ifmgd->associated->bssid;
2496         u8 unicast_limit = max(1, max_probe_tries - 3);
2497         struct sta_info *sta;
2498
2499         /*
2500          * Try sending broadcast probe requests for the last three
2501          * probe requests after the first ones failed since some
2502          * buggy APs only support broadcast probe requests.
2503          */
2504         if (ifmgd->probe_send_count >= unicast_limit)
2505                 dst = NULL;
2506
2507         /*
2508          * When the hardware reports an accurate Tx ACK status, it's
2509          * better to send a nullfunc frame instead of a probe request,
2510          * as it will kick us off the AP quickly if we aren't associated
2511          * anymore. The timeout will be reset if the frame is ACKed by
2512          * the AP.
2513          */
2514         ifmgd->probe_send_count++;
2515
2516         if (dst) {
2517                 mutex_lock(&sdata->local->sta_mtx);
2518                 sta = sta_info_get(sdata, dst);
2519                 if (!WARN_ON(!sta))
2520                         ieee80211_check_fast_rx(sta);
2521                 mutex_unlock(&sdata->local->sta_mtx);
2522         }
2523
2524         if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2525                 ifmgd->nullfunc_failed = false;
2526                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
2527                         ifmgd->probe_send_count--;
2528                 else
2529                         ieee80211_send_nullfunc(sdata->local, sdata, false);
2530         } else {
2531                 int ssid_len;
2532
2533                 rcu_read_lock();
2534                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2535                 if (WARN_ON_ONCE(ssid == NULL))
2536                         ssid_len = 0;
2537                 else
2538                         ssid_len = ssid[1];
2539
2540                 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
2541                                               ssid + 2, ssid_len,
2542                                               ifmgd->associated->channel);
2543                 rcu_read_unlock();
2544         }
2545
2546         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2547         run_again(sdata, ifmgd->probe_timeout);
2548 }
2549
2550 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2551                                    bool beacon)
2552 {
2553         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2554         bool already = false;
2555
2556         if (!ieee80211_sdata_running(sdata))
2557                 return;
2558
2559         sdata_lock(sdata);
2560
2561         if (!ifmgd->associated)
2562                 goto out;
2563
2564         mutex_lock(&sdata->local->mtx);
2565
2566         if (sdata->local->tmp_channel || sdata->local->scanning) {
2567                 mutex_unlock(&sdata->local->mtx);
2568                 goto out;
2569         }
2570
2571         if (beacon) {
2572                 mlme_dbg_ratelimited(sdata,
2573                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2574                                      beacon_loss_count);
2575
2576                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2577         }
2578
2579         /*
2580          * The driver/our work has already reported this event or the
2581          * connection monitoring has kicked in and we have already sent
2582          * a probe request. Or maybe the AP died and the driver keeps
2583          * reporting until we disassociate...
2584          *
2585          * In either case we have to ignore the current call to this
2586          * function (except for setting the correct probe reason bit)
2587          * because otherwise we would reset the timer every time and
2588          * never check whether we received a probe response!
2589          */
2590         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2591                 already = true;
2592
2593         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2594
2595         mutex_unlock(&sdata->local->mtx);
2596
2597         if (already)
2598                 goto out;
2599
2600         mutex_lock(&sdata->local->iflist_mtx);
2601         ieee80211_recalc_ps(sdata->local);
2602         mutex_unlock(&sdata->local->iflist_mtx);
2603
2604         ifmgd->probe_send_count = 0;
2605         ieee80211_mgd_probe_ap_send(sdata);
2606  out:
2607         sdata_unlock(sdata);
2608 }
2609
2610 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2611                                           struct ieee80211_vif *vif)
2612 {
2613         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2614         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2615         struct cfg80211_bss *cbss;
2616         struct sk_buff *skb;
2617         const u8 *ssid;
2618         int ssid_len;
2619
2620         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2621                 return NULL;
2622
2623         sdata_assert_lock(sdata);
2624
2625         if (ifmgd->associated)
2626                 cbss = ifmgd->associated;
2627         else if (ifmgd->auth_data)
2628                 cbss = ifmgd->auth_data->bss;
2629         else if (ifmgd->assoc_data)
2630                 cbss = ifmgd->assoc_data->bss;
2631         else
2632                 return NULL;
2633
2634         rcu_read_lock();
2635         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2636         if (WARN_ONCE(!ssid || ssid[1] > IEEE80211_MAX_SSID_LEN,
2637                       "invalid SSID element (len=%d)", ssid ? ssid[1] : -1))
2638                 ssid_len = 0;
2639         else
2640                 ssid_len = ssid[1];
2641
2642         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2643                                         (u32) -1, cbss->channel,
2644                                         ssid + 2, ssid_len,
2645                                         NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
2646         rcu_read_unlock();
2647
2648         return skb;
2649 }
2650 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2651
2652 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2653                                         const u8 *buf, size_t len, bool tx,
2654                                         u16 reason)
2655 {
2656         struct ieee80211_event event = {
2657                 .type = MLME_EVENT,
2658                 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2659                 .u.mlme.reason = reason,
2660         };
2661
2662         if (tx)
2663                 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2664         else
2665                 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2666
2667         drv_event_callback(sdata->local, sdata, &event);
2668 }
2669
2670 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2671 {
2672         struct ieee80211_local *local = sdata->local;
2673         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2674         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2675         bool tx;
2676
2677         sdata_lock(sdata);
2678         if (!ifmgd->associated) {
2679                 sdata_unlock(sdata);
2680                 return;
2681         }
2682
2683         tx = !sdata->csa_block_tx;
2684
2685         /* AP is probably out of range (or not reachable for another reason) so
2686          * remove the bss struct for that AP.
2687          */
2688         cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2689
2690         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2691                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2692                                tx, frame_buf);
2693         mutex_lock(&local->mtx);
2694         sdata->vif.csa_active = false;
2695         ifmgd->csa_waiting_bcn = false;
2696         if (sdata->csa_block_tx) {
2697                 ieee80211_wake_vif_queues(local, sdata,
2698                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2699                 sdata->csa_block_tx = false;
2700         }
2701         mutex_unlock(&local->mtx);
2702
2703         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
2704                                     WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2705
2706         sdata_unlock(sdata);
2707 }
2708
2709 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2710 {
2711         struct ieee80211_sub_if_data *sdata =
2712                 container_of(work, struct ieee80211_sub_if_data,
2713                              u.mgd.beacon_connection_loss_work);
2714         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2715
2716         if (ifmgd->associated)
2717                 ifmgd->beacon_loss_count++;
2718
2719         if (ifmgd->connection_loss) {
2720                 sdata_info(sdata, "Connection to AP %pM lost\n",
2721                            ifmgd->bssid);
2722                 __ieee80211_disconnect(sdata);
2723         } else {
2724                 ieee80211_mgd_probe_ap(sdata, true);
2725         }
2726 }
2727
2728 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2729 {
2730         struct ieee80211_sub_if_data *sdata =
2731                 container_of(work, struct ieee80211_sub_if_data,
2732                              u.mgd.csa_connection_drop_work);
2733
2734         __ieee80211_disconnect(sdata);
2735 }
2736
2737 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2738 {
2739         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2740         struct ieee80211_hw *hw = &sdata->local->hw;
2741
2742         trace_api_beacon_loss(sdata);
2743
2744         sdata->u.mgd.connection_loss = false;
2745         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2746 }
2747 EXPORT_SYMBOL(ieee80211_beacon_loss);
2748
2749 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2750 {
2751         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2752         struct ieee80211_hw *hw = &sdata->local->hw;
2753
2754         trace_api_connection_loss(sdata);
2755
2756         sdata->u.mgd.connection_loss = true;
2757         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2758 }
2759 EXPORT_SYMBOL(ieee80211_connection_loss);
2760
2761
2762 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2763                                         bool assoc)
2764 {
2765         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2766
2767         sdata_assert_lock(sdata);
2768
2769         if (!assoc) {
2770                 /*
2771                  * we are not authenticated yet, the only timer that could be
2772                  * running is the timeout for the authentication response which
2773                  * which is not relevant anymore.
2774                  */
2775                 del_timer_sync(&sdata->u.mgd.timer);
2776                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2777
2778                 eth_zero_addr(sdata->u.mgd.bssid);
2779                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2780                 sdata->u.mgd.flags = 0;
2781                 mutex_lock(&sdata->local->mtx);
2782                 ieee80211_vif_release_channel(sdata);
2783                 mutex_unlock(&sdata->local->mtx);
2784         }
2785
2786         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2787         kfree(auth_data);
2788         sdata->u.mgd.auth_data = NULL;
2789 }
2790
2791 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2792                                          bool assoc, bool abandon)
2793 {
2794         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2795
2796         sdata_assert_lock(sdata);
2797
2798         if (!assoc) {
2799                 /*
2800                  * we are not associated yet, the only timer that could be
2801                  * running is the timeout for the association response which
2802                  * which is not relevant anymore.
2803                  */
2804                 del_timer_sync(&sdata->u.mgd.timer);
2805                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2806
2807                 eth_zero_addr(sdata->u.mgd.bssid);
2808                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2809                 sdata->u.mgd.flags = 0;
2810                 sdata->vif.mu_mimo_owner = false;
2811
2812                 mutex_lock(&sdata->local->mtx);
2813                 ieee80211_vif_release_channel(sdata);
2814                 mutex_unlock(&sdata->local->mtx);
2815
2816                 if (abandon)
2817                         cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2818         }
2819
2820         kfree(assoc_data);
2821         sdata->u.mgd.assoc_data = NULL;
2822 }
2823
2824 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2825                                      struct ieee80211_mgmt *mgmt, size_t len)
2826 {
2827         struct ieee80211_local *local = sdata->local;
2828         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2829         u8 *pos;
2830         struct ieee802_11_elems elems;
2831         u32 tx_flags = 0;
2832
2833         pos = mgmt->u.auth.variable;
2834         ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
2835                                mgmt->bssid, auth_data->bss->bssid);
2836         if (!elems.challenge)
2837                 return;
2838         auth_data->expected_transaction = 4;
2839         drv_mgd_prepare_tx(sdata->local, sdata, 0);
2840         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2841                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2842                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2843         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2844                             elems.challenge - 2, elems.challenge_len + 2,
2845                             auth_data->bss->bssid, auth_data->bss->bssid,
2846                             auth_data->key, auth_data->key_len,
2847                             auth_data->key_idx, tx_flags);
2848 }
2849
2850 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata,
2851                                     const u8 *bssid)
2852 {
2853         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2854         struct sta_info *sta;
2855         bool result = true;
2856
2857         sdata_info(sdata, "authenticated\n");
2858         ifmgd->auth_data->done = true;
2859         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2860         ifmgd->auth_data->timeout_started = true;
2861         run_again(sdata, ifmgd->auth_data->timeout);
2862
2863         /* move station state to auth */
2864         mutex_lock(&sdata->local->sta_mtx);
2865         sta = sta_info_get(sdata, bssid);
2866         if (!sta) {
2867                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2868                 result = false;
2869                 goto out;
2870         }
2871         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2872                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2873                 result = false;
2874                 goto out;
2875         }
2876
2877 out:
2878         mutex_unlock(&sdata->local->sta_mtx);
2879         return result;
2880 }
2881
2882 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2883                                    struct ieee80211_mgmt *mgmt, size_t len)
2884 {
2885         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2886         u8 bssid[ETH_ALEN];
2887         u16 auth_alg, auth_transaction, status_code;
2888         struct ieee80211_event event = {
2889                 .type = MLME_EVENT,
2890                 .u.mlme.data = AUTH_EVENT,
2891         };
2892
2893         sdata_assert_lock(sdata);
2894
2895         if (len < 24 + 6)
2896                 return;
2897
2898         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2899                 return;
2900
2901         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2902
2903         if (!ether_addr_equal(bssid, mgmt->bssid))
2904                 return;
2905
2906         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2907         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2908         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2909
2910         if (auth_alg != ifmgd->auth_data->algorithm ||
2911             (auth_alg != WLAN_AUTH_SAE &&
2912              auth_transaction != ifmgd->auth_data->expected_transaction) ||
2913             (auth_alg == WLAN_AUTH_SAE &&
2914              (auth_transaction < ifmgd->auth_data->expected_transaction ||
2915               auth_transaction > 2))) {
2916                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2917                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2918                            auth_transaction,
2919                            ifmgd->auth_data->expected_transaction);
2920                 return;
2921         }
2922
2923         if (status_code != WLAN_STATUS_SUCCESS) {
2924                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2925                            mgmt->sa, status_code);
2926                 ieee80211_destroy_auth_data(sdata, false);
2927                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2928                 event.u.mlme.status = MLME_DENIED;
2929                 event.u.mlme.reason = status_code;
2930                 drv_event_callback(sdata->local, sdata, &event);
2931                 return;
2932         }
2933
2934         switch (ifmgd->auth_data->algorithm) {
2935         case WLAN_AUTH_OPEN:
2936         case WLAN_AUTH_LEAP:
2937         case WLAN_AUTH_FT:
2938         case WLAN_AUTH_SAE:
2939         case WLAN_AUTH_FILS_SK:
2940         case WLAN_AUTH_FILS_SK_PFS:
2941         case WLAN_AUTH_FILS_PK:
2942                 break;
2943         case WLAN_AUTH_SHARED_KEY:
2944                 if (ifmgd->auth_data->expected_transaction != 4) {
2945                         ieee80211_auth_challenge(sdata, mgmt, len);
2946                         /* need another frame */
2947                         return;
2948                 }
2949                 break;
2950         default:
2951                 WARN_ONCE(1, "invalid auth alg %d",
2952                           ifmgd->auth_data->algorithm);
2953                 return;
2954         }
2955
2956         event.u.mlme.status = MLME_SUCCESS;
2957         drv_event_callback(sdata->local, sdata, &event);
2958         if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
2959             (auth_transaction == 2 &&
2960              ifmgd->auth_data->expected_transaction == 2)) {
2961                 if (!ieee80211_mark_sta_auth(sdata, bssid))
2962                         return; /* ignore frame -- wait for timeout */
2963         } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2964                    auth_transaction == 2) {
2965                 sdata_info(sdata, "SAE peer confirmed\n");
2966                 ifmgd->auth_data->peer_confirmed = true;
2967         }
2968
2969         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2970 }
2971
2972 #define case_WLAN(type) \
2973         case WLAN_REASON_##type: return #type
2974
2975 const char *ieee80211_get_reason_code_string(u16 reason_code)
2976 {
2977         switch (reason_code) {
2978         case_WLAN(UNSPECIFIED);
2979         case_WLAN(PREV_AUTH_NOT_VALID);
2980         case_WLAN(DEAUTH_LEAVING);
2981         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2982         case_WLAN(DISASSOC_AP_BUSY);
2983         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2984         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2985         case_WLAN(DISASSOC_STA_HAS_LEFT);
2986         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2987         case_WLAN(DISASSOC_BAD_POWER);
2988         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2989         case_WLAN(INVALID_IE);
2990         case_WLAN(MIC_FAILURE);
2991         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2992         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2993         case_WLAN(IE_DIFFERENT);
2994         case_WLAN(INVALID_GROUP_CIPHER);
2995         case_WLAN(INVALID_PAIRWISE_CIPHER);
2996         case_WLAN(INVALID_AKMP);
2997         case_WLAN(UNSUPP_RSN_VERSION);
2998         case_WLAN(INVALID_RSN_IE_CAP);
2999         case_WLAN(IEEE8021X_FAILED);
3000         case_WLAN(CIPHER_SUITE_REJECTED);
3001         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
3002         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
3003         case_WLAN(DISASSOC_LOW_ACK);
3004         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
3005         case_WLAN(QSTA_LEAVE_QBSS);
3006         case_WLAN(QSTA_NOT_USE);
3007         case_WLAN(QSTA_REQUIRE_SETUP);
3008         case_WLAN(QSTA_TIMEOUT);
3009         case_WLAN(QSTA_CIPHER_NOT_SUPP);
3010         case_WLAN(MESH_PEER_CANCELED);
3011         case_WLAN(MESH_MAX_PEERS);
3012         case_WLAN(MESH_CONFIG);
3013         case_WLAN(MESH_CLOSE);
3014         case_WLAN(MESH_MAX_RETRIES);
3015         case_WLAN(MESH_CONFIRM_TIMEOUT);
3016         case_WLAN(MESH_INVALID_GTK);
3017         case_WLAN(MESH_INCONSISTENT_PARAM);
3018         case_WLAN(MESH_INVALID_SECURITY);
3019         case_WLAN(MESH_PATH_ERROR);
3020         case_WLAN(MESH_PATH_NOFORWARD);
3021         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
3022         case_WLAN(MAC_EXISTS_IN_MBSS);
3023         case_WLAN(MESH_CHAN_REGULATORY);
3024         case_WLAN(MESH_CHAN);
3025         default: return "<unknown>";
3026         }
3027 }
3028
3029 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
3030                                      struct ieee80211_mgmt *mgmt, size_t len)
3031 {
3032         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3033         u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
3034
3035         sdata_assert_lock(sdata);
3036
3037         if (len < 24 + 2)
3038                 return;
3039
3040         if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3041                 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3042                 return;
3043         }
3044
3045         if (ifmgd->associated &&
3046             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
3047                 const u8 *bssid = ifmgd->associated->bssid;
3048
3049                 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
3050                            bssid, reason_code,
3051                            ieee80211_get_reason_code_string(reason_code));
3052
3053                 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3054
3055                 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
3056                                             reason_code);
3057                 return;
3058         }
3059
3060         if (ifmgd->assoc_data &&
3061             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3062                 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
3063
3064                 sdata_info(sdata,
3065                            "deauthenticated from %pM while associating (Reason: %u=%s)\n",
3066                            bssid, reason_code,
3067                            ieee80211_get_reason_code_string(reason_code));
3068
3069                 ieee80211_destroy_assoc_data(sdata, false, true);
3070
3071                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3072                 return;
3073         }
3074 }
3075
3076
3077 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
3078                                        struct ieee80211_mgmt *mgmt, size_t len)
3079 {
3080         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3081         u16 reason_code;
3082
3083         sdata_assert_lock(sdata);
3084
3085         if (len < 24 + 2)
3086                 return;
3087
3088         if (!ifmgd->associated ||
3089             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3090                 return;
3091
3092         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
3093
3094         if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3095                 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3096                 return;
3097         }
3098
3099         sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
3100                    mgmt->sa, reason_code,
3101                    ieee80211_get_reason_code_string(reason_code));
3102
3103         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3104
3105         ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
3106 }
3107
3108 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
3109                                 u8 *supp_rates, unsigned int supp_rates_len,
3110                                 u32 *rates, u32 *basic_rates,
3111                                 bool *have_higher_than_11mbit,
3112                                 int *min_rate, int *min_rate_index,
3113                                 int shift)
3114 {
3115         int i, j;
3116
3117         for (i = 0; i < supp_rates_len; i++) {
3118                 int rate = supp_rates[i] & 0x7f;
3119                 bool is_basic = !!(supp_rates[i] & 0x80);
3120
3121                 if ((rate * 5 * (1 << shift)) > 110)
3122                         *have_higher_than_11mbit = true;
3123
3124                 /*
3125                  * Skip HT and VHT BSS membership selectors since they're not
3126                  * rates.
3127                  *
3128                  * Note: Even though the membership selector and the basic
3129                  *       rate flag share the same bit, they are not exactly
3130                  *       the same.
3131                  */
3132                 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3133                     supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
3134                         continue;
3135
3136                 for (j = 0; j < sband->n_bitrates; j++) {
3137                         struct ieee80211_rate *br;
3138                         int brate;
3139
3140                         br = &sband->bitrates[j];
3141
3142                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3143                         if (brate == rate) {
3144                                 *rates |= BIT(j);
3145                                 if (is_basic)
3146                                         *basic_rates |= BIT(j);
3147                                 if ((rate * 5) < *min_rate) {
3148                                         *min_rate = rate * 5;
3149                                         *min_rate_index = j;
3150                                 }
3151                                 break;
3152                         }
3153                 }
3154         }
3155 }
3156
3157 static bool ieee80211_twt_req_supported(const struct sta_info *sta,
3158                                         const struct ieee802_11_elems *elems)
3159 {
3160         if (elems->ext_capab_len < 10)
3161                 return false;
3162
3163         if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
3164                 return false;
3165
3166         return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] &
3167                 IEEE80211_HE_MAC_CAP0_TWT_RES;
3168 }
3169
3170 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata,
3171                                     struct sta_info *sta,
3172                                     struct ieee802_11_elems *elems)
3173 {
3174         bool twt = ieee80211_twt_req_supported(sta, elems);
3175
3176         if (sdata->vif.bss_conf.twt_requester != twt) {
3177                 sdata->vif.bss_conf.twt_requester = twt;
3178                 return BSS_CHANGED_TWT;
3179         }
3180         return 0;
3181 }
3182
3183 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
3184                                     struct cfg80211_bss *cbss,
3185                                     struct ieee80211_mgmt *mgmt, size_t len,
3186                                     struct ieee802_11_elems *elems)
3187 {
3188         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3189         struct ieee80211_local *local = sdata->local;
3190         struct ieee80211_supported_band *sband;
3191         struct sta_info *sta;
3192         u16 capab_info, aid;
3193         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3194         const struct cfg80211_bss_ies *bss_ies = NULL;
3195         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3196         u32 changed = 0;
3197         int err;
3198         bool ret;
3199
3200         /* AssocResp and ReassocResp have identical structure */
3201
3202         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3203         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3204
3205         /*
3206          * The 5 MSB of the AID field are reserved
3207          * (802.11-2016 9.4.1.8 AID field)
3208          */
3209         aid &= 0x7ff;
3210
3211         ifmgd->broken_ap = false;
3212
3213         if (aid == 0 || aid > IEEE80211_MAX_AID) {
3214                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
3215                            aid);
3216                 aid = 0;
3217                 ifmgd->broken_ap = true;
3218         }
3219
3220         if (!elems->supp_rates) {
3221                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
3222                 return false;
3223         }
3224
3225         ifmgd->aid = aid;
3226         ifmgd->tdls_chan_switch_prohibited =
3227                 elems->ext_capab && elems->ext_capab_len >= 5 &&
3228                 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3229
3230         /*
3231          * Some APs are erroneously not including some information in their
3232          * (re)association response frames. Try to recover by using the data
3233          * from the beacon or probe response. This seems to afflict mobile
3234          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
3235          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
3236          */
3237         if ((assoc_data->wmm && !elems->wmm_param) ||
3238             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3239              (!elems->ht_cap_elem || !elems->ht_operation)) ||
3240             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3241              (!elems->vht_cap_elem || !elems->vht_operation))) {
3242                 const struct cfg80211_bss_ies *ies;
3243                 struct ieee802_11_elems bss_elems;
3244
3245                 rcu_read_lock();
3246                 ies = rcu_dereference(cbss->ies);
3247                 if (ies)
3248                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3249                                           GFP_ATOMIC);
3250                 rcu_read_unlock();
3251                 if (!bss_ies)
3252                         return false;
3253
3254                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
3255                                        false, &bss_elems,
3256                                        mgmt->bssid,
3257                                        assoc_data->bss->bssid);
3258                 if (assoc_data->wmm &&
3259                     !elems->wmm_param && bss_elems.wmm_param) {
3260                         elems->wmm_param = bss_elems.wmm_param;
3261                         sdata_info(sdata,
3262                                    "AP bug: WMM param missing from AssocResp\n");
3263                 }
3264
3265                 /*
3266                  * Also check if we requested HT/VHT, otherwise the AP doesn't
3267                  * have to include the IEs in the (re)association response.
3268                  */
3269                 if (!elems->ht_cap_elem && bss_elems.ht_cap_elem &&
3270                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3271                         elems->ht_cap_elem = bss_elems.ht_cap_elem;
3272                         sdata_info(sdata,
3273                                    "AP bug: HT capability missing from AssocResp\n");
3274                 }
3275                 if (!elems->ht_operation && bss_elems.ht_operation &&
3276                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3277                         elems->ht_operation = bss_elems.ht_operation;
3278                         sdata_info(sdata,
3279                                    "AP bug: HT operation missing from AssocResp\n");
3280                 }
3281                 if (!elems->vht_cap_elem && bss_elems.vht_cap_elem &&
3282                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3283                         elems->vht_cap_elem = bss_elems.vht_cap_elem;
3284                         sdata_info(sdata,
3285                                    "AP bug: VHT capa missing from AssocResp\n");
3286                 }
3287                 if (!elems->vht_operation && bss_elems.vht_operation &&
3288                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3289                         elems->vht_operation = bss_elems.vht_operation;
3290                         sdata_info(sdata,
3291                                    "AP bug: VHT operation missing from AssocResp\n");
3292                 }
3293         }
3294
3295         /*
3296          * We previously checked these in the beacon/probe response, so
3297          * they should be present here. This is just a safety net.
3298          */
3299         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3300             (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) {
3301                 sdata_info(sdata,
3302                            "HT AP is missing WMM params or HT capability/operation\n");
3303                 ret = false;
3304                 goto out;
3305         }
3306
3307         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3308             (!elems->vht_cap_elem || !elems->vht_operation)) {
3309                 sdata_info(sdata,
3310                            "VHT AP is missing VHT capability/operation\n");
3311                 ret = false;
3312                 goto out;
3313         }
3314
3315         mutex_lock(&sdata->local->sta_mtx);
3316         /*
3317          * station info was already allocated and inserted before
3318          * the association and should be available to us
3319          */
3320         sta = sta_info_get(sdata, cbss->bssid);
3321         if (WARN_ON(!sta)) {
3322                 mutex_unlock(&sdata->local->sta_mtx);
3323                 ret = false;
3324                 goto out;
3325         }
3326
3327         sband = ieee80211_get_sband(sdata);
3328         if (!sband) {
3329                 mutex_unlock(&sdata->local->sta_mtx);
3330                 ret = false;
3331                 goto out;
3332         }
3333
3334         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3335             (!elems->he_cap || !elems->he_operation)) {
3336                 mutex_unlock(&sdata->local->sta_mtx);
3337                 sdata_info(sdata,
3338                            "HE AP is missing HE capability/operation\n");
3339                 ret = false;
3340                 goto out;
3341         }
3342
3343         /* Set up internal HT/VHT capabilities */
3344         if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3345                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3346                                                   elems->ht_cap_elem, sta);
3347
3348         if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3349                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3350                                                     elems->vht_cap_elem, sta);
3351
3352         if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3353             elems->he_cap) {
3354                 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
3355                                                   elems->he_cap,
3356                                                   elems->he_cap_len,
3357                                                   sta);
3358
3359                 bss_conf->he_support = sta->sta.he_cap.has_he;
3360                 changed |= ieee80211_recalc_twt_req(sdata, sta, elems);
3361         } else {
3362                 bss_conf->he_support = false;
3363                 bss_conf->twt_requester = false;
3364         }
3365
3366         if (bss_conf->he_support) {
3367                 bss_conf->bss_color =
3368                         le32_get_bits(elems->he_operation->he_oper_params,
3369                                       IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
3370
3371                 bss_conf->htc_trig_based_pkt_ext =
3372                         le32_get_bits(elems->he_operation->he_oper_params,
3373                               IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
3374                 bss_conf->frame_time_rts_th =
3375                         le32_get_bits(elems->he_operation->he_oper_params,
3376                               IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3377
3378                 bss_conf->multi_sta_back_32bit =
3379                         sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3380                         IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP;
3381
3382                 bss_conf->ack_enabled =
3383                         sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3384                         IEEE80211_HE_MAC_CAP2_ACK_EN;
3385
3386                 bss_conf->uora_exists = !!elems->uora_element;
3387                 if (elems->uora_element)
3388                         bss_conf->uora_ocw_range = elems->uora_element[0];
3389
3390                 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation);
3391                 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr);
3392                 /* TODO: OPEN: what happens if BSS color disable is set? */
3393         }
3394
3395         if (cbss->transmitted_bss) {
3396                 bss_conf->nontransmitted = true;
3397                 ether_addr_copy(bss_conf->transmitter_bssid,
3398                                 cbss->transmitted_bss->bssid);
3399                 bss_conf->bssid_indicator = cbss->max_bssid_indicator;
3400                 bss_conf->bssid_index = cbss->bssid_index;
3401         }
3402
3403         /*
3404          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3405          * in their association response, so ignore that data for our own
3406          * configuration. If it changed since the last beacon, we'll get the
3407          * next beacon and update then.
3408          */
3409
3410         /*
3411          * If an operating mode notification IE is present, override the
3412          * NSS calculation (that would be done in rate_control_rate_init())
3413          * and use the # of streams from that element.
3414          */
3415         if (elems->opmode_notif &&
3416             !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3417                 u8 nss;
3418
3419                 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3420                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3421                 nss += 1;
3422                 sta->sta.rx_nss = nss;
3423         }
3424
3425         rate_control_rate_init(sta);
3426
3427         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3428                 set_sta_flag(sta, WLAN_STA_MFP);
3429                 sta->sta.mfp = true;
3430         } else {
3431                 sta->sta.mfp = false;
3432         }
3433
3434         sta->sta.wme = elems->wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3435
3436         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3437         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3438                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3439         if (err) {
3440                 sdata_info(sdata,
3441                            "failed to move station %pM to desired state\n",
3442                            sta->sta.addr);
3443                 WARN_ON(__sta_info_destroy(sta));
3444                 mutex_unlock(&sdata->local->sta_mtx);
3445                 ret = false;
3446                 goto out;
3447         }
3448
3449         mutex_unlock(&sdata->local->sta_mtx);
3450
3451         /*
3452          * Always handle WMM once after association regardless
3453          * of the first value the AP uses. Setting -1 here has
3454          * that effect because the AP values is an unsigned
3455          * 4-bit value.
3456          */
3457         ifmgd->wmm_last_param_set = -1;
3458         ifmgd->mu_edca_last_param_set = -1;
3459
3460         if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3461                 ieee80211_set_wmm_default(sdata, false, false);
3462         } else if (!ieee80211_sta_wmm_params(local, sdata, elems->wmm_param,
3463                                              elems->wmm_param_len,
3464                                              elems->mu_edca_param_set)) {
3465                 /* still enable QoS since we might have HT/VHT */
3466                 ieee80211_set_wmm_default(sdata, false, true);
3467                 /* set the disable-WMM flag in this case to disable
3468                  * tracking WMM parameter changes in the beacon if
3469                  * the parameters weren't actually valid. Doing so
3470                  * avoids changing parameters very strangely when
3471                  * the AP is going back and forth between valid and
3472                  * invalid parameters.
3473                  */
3474                 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3475         }
3476         changed |= BSS_CHANGED_QOS;
3477
3478         if (elems->max_idle_period_ie) {
3479                 bss_conf->max_idle_period =
3480                         le16_to_cpu(elems->max_idle_period_ie->max_idle_period);
3481                 bss_conf->protected_keep_alive =
3482                         !!(elems->max_idle_period_ie->idle_options &
3483                            WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3484                 changed |= BSS_CHANGED_KEEP_ALIVE;
3485         } else {
3486                 bss_conf->max_idle_period = 0;
3487                 bss_conf->protected_keep_alive = false;
3488         }
3489
3490         /* set AID and assoc capability,
3491          * ieee80211_set_associated() will tell the driver */
3492         bss_conf->aid = aid;
3493         bss_conf->assoc_capability = capab_info;
3494         ieee80211_set_associated(sdata, cbss, changed);
3495
3496         /*
3497          * If we're using 4-addr mode, let the AP know that we're
3498          * doing so, so that it can create the STA VLAN on its side
3499          */
3500         if (ifmgd->use_4addr)
3501                 ieee80211_send_4addr_nullfunc(local, sdata);
3502
3503         /*
3504          * Start timer to probe the connection to the AP now.
3505          * Also start the timer that will detect beacon loss.
3506          */
3507         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3508         ieee80211_sta_reset_beacon_monitor(sdata);
3509
3510         ret = true;
3511  out:
3512         kfree(bss_ies);
3513         return ret;
3514 }
3515
3516 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3517                                          struct ieee80211_mgmt *mgmt,
3518                                          size_t len)
3519 {
3520         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3521         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3522         u16 capab_info, status_code, aid;
3523         struct ieee802_11_elems elems;
3524         int ac, uapsd_queues = -1;
3525         u8 *pos;
3526         bool reassoc;
3527         struct cfg80211_bss *bss;
3528         struct ieee80211_event event = {
3529                 .type = MLME_EVENT,
3530                 .u.mlme.data = ASSOC_EVENT,
3531         };
3532
3533         sdata_assert_lock(sdata);
3534
3535         if (!assoc_data)
3536                 return;
3537         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3538                 return;
3539
3540         /*
3541          * AssocResp and ReassocResp have identical structure, so process both
3542          * of them in this function.
3543          */
3544
3545         if (len < 24 + 6)
3546                 return;
3547
3548         reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
3549         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3550         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3551         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3552
3553         sdata_info(sdata,
3554                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3555                    reassoc ? "Rea" : "A", mgmt->sa,
3556                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3557
3558         if (assoc_data->fils_kek_len &&
3559             fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3560                 return;
3561
3562         pos = mgmt->u.assoc_resp.variable;
3563         ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
3564                                mgmt->bssid, assoc_data->bss->bssid);
3565
3566         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3567             elems.timeout_int &&
3568             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3569                 u32 tu, ms;
3570                 tu = le32_to_cpu(elems.timeout_int->value);
3571                 ms = tu * 1024 / 1000;
3572                 sdata_info(sdata,
3573                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3574                            mgmt->sa, tu, ms);
3575                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3576                 assoc_data->timeout_started = true;
3577                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3578                         run_again(sdata, assoc_data->timeout);
3579                 return;
3580         }
3581
3582         bss = assoc_data->bss;
3583
3584         if (status_code != WLAN_STATUS_SUCCESS) {
3585                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3586                            mgmt->sa, status_code);
3587                 ieee80211_destroy_assoc_data(sdata, false, false);
3588                 event.u.mlme.status = MLME_DENIED;
3589                 event.u.mlme.reason = status_code;
3590                 drv_event_callback(sdata->local, sdata, &event);
3591         } else {
3592                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len, &elems)) {
3593                         /* oops -- internal error -- send timeout for now */
3594                         ieee80211_destroy_assoc_data(sdata, false, false);
3595                         cfg80211_assoc_timeout(sdata->dev, bss);
3596                         return;
3597                 }
3598                 event.u.mlme.status = MLME_SUCCESS;
3599                 drv_event_callback(sdata->local, sdata, &event);
3600                 sdata_info(sdata, "associated\n");
3601
3602                 /*
3603                  * destroy assoc_data afterwards, as otherwise an idle
3604                  * recalc after assoc_data is NULL but before associated
3605                  * is set can cause the interface to go idle
3606                  */
3607                 ieee80211_destroy_assoc_data(sdata, true, false);
3608
3609                 /* get uapsd queues configuration */
3610                 uapsd_queues = 0;
3611                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3612                         if (sdata->tx_conf[ac].uapsd)
3613                                 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3614         }
3615
3616         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues,
3617                                ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len);
3618 }
3619
3620 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3621                                   struct ieee80211_mgmt *mgmt, size_t len,
3622                                   struct ieee80211_rx_status *rx_status)
3623 {
3624         struct ieee80211_local *local = sdata->local;
3625         struct ieee80211_bss *bss;
3626         struct ieee80211_channel *channel;
3627
3628         sdata_assert_lock(sdata);
3629
3630         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3631         if (!channel)
3632                 return;
3633
3634         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
3635         if (bss) {
3636                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3637                 ieee80211_rx_bss_put(local, bss);
3638         }
3639 }
3640
3641
3642 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3643                                          struct sk_buff *skb)
3644 {
3645         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3646         struct ieee80211_if_managed *ifmgd;
3647         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3648         size_t baselen, len = skb->len;
3649
3650         ifmgd = &sdata->u.mgd;
3651
3652         sdata_assert_lock(sdata);
3653
3654         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3655                 return; /* ignore ProbeResp to foreign address */
3656
3657         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3658         if (baselen > len)
3659                 return;
3660
3661         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3662
3663         if (ifmgd->associated &&
3664             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3665                 ieee80211_reset_ap_probe(sdata);
3666 }
3667
3668 /*
3669  * This is the canonical list of information elements we care about,
3670  * the filter code also gives us all changes to the Microsoft OUI
3671  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3672  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3673  * changes to requested client power.
3674  *
3675  * We implement beacon filtering in software since that means we can
3676  * avoid processing the frame here and in cfg80211, and userspace
3677  * will not be able to tell whether the hardware supports it or not.
3678  *
3679  * XXX: This list needs to be dynamic -- userspace needs to be able to
3680  *      add items it requires. It also needs to be able to tell us to
3681  *      look out for other vendor IEs.
3682  */
3683 static const u64 care_about_ies =
3684         (1ULL << WLAN_EID_COUNTRY) |
3685         (1ULL << WLAN_EID_ERP_INFO) |
3686         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3687         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3688         (1ULL << WLAN_EID_HT_CAPABILITY) |
3689         (1ULL << WLAN_EID_HT_OPERATION) |
3690         (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3691
3692 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata,
3693                                         struct ieee80211_if_managed *ifmgd,
3694                                         struct ieee80211_bss_conf *bss_conf,
3695                                         struct ieee80211_local *local,
3696                                         struct ieee80211_rx_status *rx_status)
3697 {
3698         /* Track average RSSI from the Beacon frames of the current AP */
3699
3700         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3701                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3702                 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3703                 ifmgd->last_cqm_event_signal = 0;
3704                 ifmgd->count_beacon_signal = 1;
3705                 ifmgd->last_ave_beacon_signal = 0;
3706         } else {
3707                 ifmgd->count_beacon_signal++;
3708         }
3709
3710         ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3711
3712         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3713             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3714                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3715                 int last_sig = ifmgd->last_ave_beacon_signal;
3716                 struct ieee80211_event event = {
3717                         .type = RSSI_EVENT,
3718                 };
3719
3720                 /*
3721                  * if signal crosses either of the boundaries, invoke callback
3722                  * with appropriate parameters
3723                  */
3724                 if (sig > ifmgd->rssi_max_thold &&
3725                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3726                         ifmgd->last_ave_beacon_signal = sig;
3727                         event.u.rssi.data = RSSI_EVENT_HIGH;
3728                         drv_event_callback(local, sdata, &event);
3729                 } else if (sig < ifmgd->rssi_min_thold &&
3730                            (last_sig >= ifmgd->rssi_max_thold ||
3731                            last_sig == 0)) {
3732                         ifmgd->last_ave_beacon_signal = sig;
3733                         event.u.rssi.data = RSSI_EVENT_LOW;
3734                         drv_event_callback(local, sdata, &event);
3735                 }
3736         }
3737
3738         if (bss_conf->cqm_rssi_thold &&
3739             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3740             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3741                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3742                 int last_event = ifmgd->last_cqm_event_signal;
3743                 int thold = bss_conf->cqm_rssi_thold;
3744                 int hyst = bss_conf->cqm_rssi_hyst;
3745
3746                 if (sig < thold &&
3747                     (last_event == 0 || sig < last_event - hyst)) {
3748                         ifmgd->last_cqm_event_signal = sig;
3749                         ieee80211_cqm_rssi_notify(
3750                                 &sdata->vif,
3751                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3752                                 sig, GFP_KERNEL);
3753                 } else if (sig > thold &&
3754                            (last_event == 0 || sig > last_event + hyst)) {
3755                         ifmgd->last_cqm_event_signal = sig;
3756                         ieee80211_cqm_rssi_notify(
3757                                 &sdata->vif,
3758                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3759                                 sig, GFP_KERNEL);
3760                 }
3761         }
3762
3763         if (bss_conf->cqm_rssi_low &&
3764             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3765                 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3766                 int last_event = ifmgd->last_cqm_event_signal;
3767                 int low = bss_conf->cqm_rssi_low;
3768                 int high = bss_conf->cqm_rssi_high;
3769
3770                 if (sig < low &&
3771                     (last_event == 0 || last_event >= low)) {
3772                         ifmgd->last_cqm_event_signal = sig;
3773                         ieee80211_cqm_rssi_notify(
3774                                 &sdata->vif,
3775                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3776                                 sig, GFP_KERNEL);
3777                 } else if (sig > high &&
3778                            (last_event == 0 || last_event <= high)) {
3779                         ifmgd->last_cqm_event_signal = sig;
3780                         ieee80211_cqm_rssi_notify(
3781                                 &sdata->vif,
3782                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3783                                 sig, GFP_KERNEL);
3784                 }
3785         }
3786 }
3787
3788 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
3789                                     struct cfg80211_bss *bss)
3790 {
3791         if (ether_addr_equal(tx_bssid, bss->bssid))
3792                 return true;
3793         if (!bss->transmitted_bss)
3794                 return false;
3795         return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid);
3796 }
3797
3798 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3799                                      struct ieee80211_mgmt *mgmt, size_t len,
3800                                      struct ieee80211_rx_status *rx_status)
3801 {
3802         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3803         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3804         size_t baselen;
3805         struct ieee802_11_elems elems;
3806         struct ieee80211_local *local = sdata->local;
3807         struct ieee80211_chanctx_conf *chanctx_conf;
3808         struct ieee80211_channel *chan;
3809         struct sta_info *sta;
3810         u32 changed = 0;
3811         bool erp_valid;
3812         u8 erp_value = 0;
3813         u32 ncrc;
3814         u8 *bssid;
3815         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3816
3817         sdata_assert_lock(sdata);
3818
3819         /* Process beacon from the current BSS */
3820         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3821         if (baselen > len)
3822                 return;
3823
3824         rcu_read_lock();
3825         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3826         if (!chanctx_conf) {
3827                 rcu_read_unlock();
3828                 return;
3829         }
3830
3831         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3832                 rcu_read_unlock();
3833                 return;
3834         }
3835         chan = chanctx_conf->def.chan;
3836         rcu_read_unlock();
3837
3838         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3839             ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->assoc_data->bss)) {
3840                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3841                                        len - baselen, false, &elems,
3842                                        mgmt->bssid,
3843                                        ifmgd->assoc_data->bss->bssid);
3844
3845                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3846
3847                 if (elems.dtim_period)
3848                         ifmgd->dtim_period = elems.dtim_period;
3849                 ifmgd->have_beacon = true;
3850                 ifmgd->assoc_data->need_beacon = false;
3851                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3852                         sdata->vif.bss_conf.sync_tsf =
3853                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3854                         sdata->vif.bss_conf.sync_device_ts =
3855                                 rx_status->device_timestamp;
3856                         sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
3857                 }
3858
3859                 if (elems.mbssid_config_ie)
3860                         bss_conf->profile_periodicity =
3861                                 elems.mbssid_config_ie->profile_periodicity;
3862
3863                 if (elems.ext_capab_len >= 11 &&
3864                     (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
3865                         bss_conf->ema_ap = true;
3866
3867                 /* continue assoc process */
3868                 ifmgd->assoc_data->timeout = jiffies;
3869                 ifmgd->assoc_data->timeout_started = true;
3870                 run_again(sdata, ifmgd->assoc_data->timeout);
3871                 return;
3872         }
3873
3874         if (!ifmgd->associated ||
3875             !ieee80211_rx_our_beacon(mgmt->bssid,  ifmgd->associated))
3876                 return;
3877         bssid = ifmgd->associated->bssid;
3878
3879         if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
3880                 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf,
3881                                             local, rx_status);
3882
3883         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3884                 mlme_dbg_ratelimited(sdata,
3885                                      "cancelling AP probe due to a received beacon\n");
3886                 ieee80211_reset_ap_probe(sdata);
3887         }
3888
3889         /*
3890          * Push the beacon loss detection into the future since
3891          * we are processing a beacon from the AP just now.
3892          */
3893         ieee80211_sta_reset_beacon_monitor(sdata);
3894
3895         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3896         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3897                                           len - baselen, false, &elems,
3898                                           care_about_ies, ncrc,
3899                                           mgmt->bssid, bssid);
3900
3901         if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3902             ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3903                 if (local->hw.conf.dynamic_ps_timeout > 0) {
3904                         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3905                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3906                                 ieee80211_hw_config(local,
3907                                                     IEEE80211_CONF_CHANGE_PS);
3908                         }
3909                         ieee80211_send_nullfunc(local, sdata, false);
3910                 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3911                         local->pspolling = true;
3912
3913                         /*
3914                          * Here is assumed that the driver will be
3915                          * able to send ps-poll frame and receive a
3916                          * response even though power save mode is
3917                          * enabled, but some drivers might require
3918                          * to disable power save here. This needs
3919                          * to be investigated.
3920                          */
3921                         ieee80211_send_pspoll(local, sdata);
3922                 }
3923         }
3924
3925         if (sdata->vif.p2p ||
3926             sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3927                 struct ieee80211_p2p_noa_attr noa = {};
3928                 int ret;
3929
3930                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3931                                             len - baselen,
3932                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3933                                             (u8 *) &noa, sizeof(noa));
3934                 if (ret >= 2) {
3935                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3936                                 /* valid noa_attr and index changed */
3937                                 sdata->u.mgd.p2p_noa_index = noa.index;
3938                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3939                                 changed |= BSS_CHANGED_P2P_PS;
3940                                 /*
3941                                  * make sure we update all information, the CRC
3942                                  * mechanism doesn't look at P2P attributes.
3943                                  */
3944                                 ifmgd->beacon_crc_valid = false;
3945                         }
3946                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3947                         /* noa_attr not found and we had valid noa_attr before */
3948                         sdata->u.mgd.p2p_noa_index = -1;
3949                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3950                         changed |= BSS_CHANGED_P2P_PS;
3951                         ifmgd->beacon_crc_valid = false;
3952                 }
3953         }
3954
3955         if (ifmgd->csa_waiting_bcn)
3956                 ieee80211_chswitch_post_beacon(sdata);
3957
3958         /*
3959          * Update beacon timing and dtim count on every beacon appearance. This
3960          * will allow the driver to use the most updated values. Do it before
3961          * comparing this one with last received beacon.
3962          * IMPORTANT: These parameters would possibly be out of sync by the time
3963          * the driver will use them. The synchronized view is currently
3964          * guaranteed only in certain callbacks.
3965          */
3966         if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3967                 sdata->vif.bss_conf.sync_tsf =
3968                         le64_to_cpu(mgmt->u.beacon.timestamp);
3969                 sdata->vif.bss_conf.sync_device_ts =
3970                         rx_status->device_timestamp;
3971                 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
3972         }
3973
3974         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3975                 return;
3976         ifmgd->beacon_crc = ncrc;
3977         ifmgd->beacon_crc_valid = true;
3978
3979         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3980
3981         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3982                                          rx_status->device_timestamp,
3983                                          &elems, true);
3984
3985         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3986             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3987                                      elems.wmm_param_len,
3988                                      elems.mu_edca_param_set))
3989                 changed |= BSS_CHANGED_QOS;
3990
3991         /*
3992          * If we haven't had a beacon before, tell the driver about the
3993          * DTIM period (and beacon timing if desired) now.
3994          */
3995         if (!ifmgd->have_beacon) {
3996                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3997                 bss_conf->dtim_period = elems.dtim_period ?: 1;
3998
3999                 changed |= BSS_CHANGED_BEACON_INFO;
4000                 ifmgd->have_beacon = true;
4001
4002                 mutex_lock(&local->iflist_mtx);
4003                 ieee80211_recalc_ps(local);
4004                 mutex_unlock(&local->iflist_mtx);
4005
4006                 ieee80211_recalc_ps_vif(sdata);
4007         }
4008
4009         if (elems.erp_info) {
4010                 erp_valid = true;
4011                 erp_value = elems.erp_info[0];
4012         } else {
4013                 erp_valid = false;
4014         }
4015         changed |= ieee80211_handle_bss_capability(sdata,
4016                         le16_to_cpu(mgmt->u.beacon.capab_info),
4017                         erp_valid, erp_value);
4018
4019         mutex_lock(&local->sta_mtx);
4020         sta = sta_info_get(sdata, bssid);
4021
4022         changed |= ieee80211_recalc_twt_req(sdata, sta, &elems);
4023
4024         if (ieee80211_config_bw(sdata, sta,
4025                                 elems.ht_cap_elem, elems.ht_operation,
4026                                 elems.vht_operation, elems.he_operation,
4027                                 bssid, &changed)) {
4028                 mutex_unlock(&local->sta_mtx);
4029                 sdata_info(sdata,
4030                            "failed to follow AP %pM bandwidth change, disconnect\n",
4031                            bssid);
4032                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4033                                        WLAN_REASON_DEAUTH_LEAVING,
4034                                        true, deauth_buf);
4035                 ieee80211_report_disconnect(sdata, deauth_buf,
4036                                             sizeof(deauth_buf), true,
4037                                             WLAN_REASON_DEAUTH_LEAVING);
4038                 return;
4039         }
4040
4041         if (sta && elems.opmode_notif)
4042                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
4043                                             rx_status->band);
4044         mutex_unlock(&local->sta_mtx);
4045
4046         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
4047                                                elems.country_elem,
4048                                                elems.country_elem_len,
4049                                                elems.pwr_constr_elem,
4050                                                elems.cisco_dtpc_elem);
4051
4052         ieee80211_bss_info_change_notify(sdata, changed);
4053 }
4054
4055 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
4056                                   struct sk_buff *skb)
4057 {
4058         struct ieee80211_rx_status *rx_status;
4059         struct ieee80211_mgmt *mgmt;
4060         u16 fc;
4061         struct ieee802_11_elems elems;
4062         int ies_len;
4063
4064         rx_status = (struct ieee80211_rx_status *) skb->cb;
4065         mgmt = (struct ieee80211_mgmt *) skb->data;
4066         fc = le16_to_cpu(mgmt->frame_control);
4067
4068         sdata_lock(sdata);
4069
4070         switch (fc & IEEE80211_FCTL_STYPE) {
4071         case IEEE80211_STYPE_BEACON:
4072                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
4073                 break;
4074         case IEEE80211_STYPE_PROBE_RESP:
4075                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
4076                 break;
4077         case IEEE80211_STYPE_AUTH:
4078                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
4079                 break;
4080         case IEEE80211_STYPE_DEAUTH:
4081                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
4082                 break;
4083         case IEEE80211_STYPE_DISASSOC:
4084                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
4085                 break;
4086         case IEEE80211_STYPE_ASSOC_RESP:
4087         case IEEE80211_STYPE_REASSOC_RESP:
4088                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
4089                 break;
4090         case IEEE80211_STYPE_ACTION:
4091                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
4092                         ies_len = skb->len -
4093                                   offsetof(struct ieee80211_mgmt,
4094                                            u.action.u.chan_switch.variable);
4095
4096                         if (ies_len < 0)
4097                                 break;
4098
4099                         /* CSA IE cannot be overridden, no need for BSSID */
4100                         ieee802_11_parse_elems(
4101                                 mgmt->u.action.u.chan_switch.variable,
4102                                 ies_len, true, &elems, mgmt->bssid, NULL);
4103
4104                         if (elems.parse_error)
4105                                 break;
4106
4107                         ieee80211_sta_process_chanswitch(sdata,
4108                                                  rx_status->mactime,
4109                                                  rx_status->device_timestamp,
4110                                                  &elems, false);
4111                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
4112                         ies_len = skb->len -
4113                                   offsetof(struct ieee80211_mgmt,
4114                                            u.action.u.ext_chan_switch.variable);
4115
4116                         if (ies_len < 0)
4117                                 break;
4118
4119                         /*
4120                          * extended CSA IE can't be overridden, no need for
4121                          * BSSID
4122                          */
4123                         ieee802_11_parse_elems(
4124                                 mgmt->u.action.u.ext_chan_switch.variable,
4125                                 ies_len, true, &elems, mgmt->bssid, NULL);
4126
4127                         if (elems.parse_error)
4128                                 break;
4129
4130                         /* for the handling code pretend this was also an IE */
4131                         elems.ext_chansw_ie =
4132                                 &mgmt->u.action.u.ext_chan_switch.data;
4133
4134                         ieee80211_sta_process_chanswitch(sdata,
4135                                                  rx_status->mactime,
4136                                                  rx_status->device_timestamp,
4137                                                  &elems, false);
4138                 }
4139                 break;
4140         }
4141         sdata_unlock(sdata);
4142 }
4143
4144 static void ieee80211_sta_timer(struct timer_list *t)
4145 {
4146         struct ieee80211_sub_if_data *sdata =
4147                 from_timer(sdata, t, u.mgd.timer);
4148
4149         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4150 }
4151
4152 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
4153                                           u8 *bssid, u8 reason, bool tx)
4154 {
4155         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4156
4157         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
4158                                tx, frame_buf);
4159
4160         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4161                                     reason);
4162 }
4163
4164 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
4165 {
4166         struct ieee80211_local *local = sdata->local;
4167         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4168         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
4169         u32 tx_flags = 0;
4170         u16 trans = 1;
4171         u16 status = 0;
4172         u16 prepare_tx_duration = 0;
4173
4174         sdata_assert_lock(sdata);
4175
4176         if (WARN_ON_ONCE(!auth_data))
4177                 return -EINVAL;
4178
4179         auth_data->tries++;
4180
4181         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
4182                 sdata_info(sdata, "authentication with %pM timed out\n",
4183                            auth_data->bss->bssid);
4184
4185                 /*
4186                  * Most likely AP is not in the range so remove the
4187                  * bss struct for that AP.
4188                  */
4189                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
4190
4191                 return -ETIMEDOUT;
4192         }
4193
4194         if (auth_data->algorithm == WLAN_AUTH_SAE)
4195                 prepare_tx_duration =
4196                         jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
4197
4198         drv_mgd_prepare_tx(local, sdata, prepare_tx_duration);
4199
4200         sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
4201                    auth_data->bss->bssid, auth_data->tries,
4202                    IEEE80211_AUTH_MAX_TRIES);
4203
4204         auth_data->expected_transaction = 2;
4205
4206         if (auth_data->algorithm == WLAN_AUTH_SAE) {
4207                 trans = auth_data->sae_trans;
4208                 status = auth_data->sae_status;
4209                 auth_data->expected_transaction = trans;
4210         }
4211
4212         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4213                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
4214                            IEEE80211_TX_INTFL_MLME_CONN_TX;
4215
4216         ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
4217                             auth_data->data, auth_data->data_len,
4218                             auth_data->bss->bssid,
4219                             auth_data->bss->bssid, NULL, 0, 0,
4220                             tx_flags);
4221
4222         if (tx_flags == 0) {
4223                 if (auth_data->algorithm == WLAN_AUTH_SAE)
4224                         auth_data->timeout = jiffies +
4225                                 IEEE80211_AUTH_TIMEOUT_SAE;
4226                 else
4227                         auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
4228         } else {
4229                 auth_data->timeout =
4230                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
4231         }
4232
4233         auth_data->timeout_started = true;
4234         run_again(sdata, auth_data->timeout);
4235
4236         return 0;
4237 }
4238
4239 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
4240 {
4241         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
4242         struct ieee80211_local *local = sdata->local;
4243
4244         sdata_assert_lock(sdata);
4245
4246         assoc_data->tries++;
4247         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
4248                 sdata_info(sdata, "association with %pM timed out\n",
4249                            assoc_data->bss->bssid);
4250
4251                 /*
4252                  * Most likely AP is not in the range so remove the
4253                  * bss struct for that AP.
4254                  */
4255                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
4256
4257                 return -ETIMEDOUT;
4258         }
4259
4260         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
4261                    assoc_data->bss->bssid, assoc_data->tries,
4262                    IEEE80211_ASSOC_MAX_TRIES);
4263         ieee80211_send_assoc(sdata);
4264
4265         if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4266                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
4267                 assoc_data->timeout_started = true;
4268                 run_again(sdata, assoc_data->timeout);
4269         } else {
4270                 assoc_data->timeout =
4271                         round_jiffies_up(jiffies +
4272                                          IEEE80211_ASSOC_TIMEOUT_LONG);
4273                 assoc_data->timeout_started = true;
4274                 run_again(sdata, assoc_data->timeout);
4275         }
4276
4277         return 0;
4278 }
4279
4280 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
4281                                   __le16 fc, bool acked)
4282 {
4283         struct ieee80211_local *local = sdata->local;
4284
4285         sdata->u.mgd.status_fc = fc;
4286         sdata->u.mgd.status_acked = acked;
4287         sdata->u.mgd.status_received = true;
4288
4289         ieee80211_queue_work(&local->hw, &sdata->work);
4290 }
4291
4292 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
4293 {
4294         struct ieee80211_local *local = sdata->local;
4295         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4296
4297         sdata_lock(sdata);
4298
4299         if (ifmgd->status_received) {
4300                 __le16 fc = ifmgd->status_fc;
4301                 bool status_acked = ifmgd->status_acked;
4302
4303                 ifmgd->status_received = false;
4304                 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
4305                         if (status_acked) {
4306                                 if (ifmgd->auth_data->algorithm ==
4307                                     WLAN_AUTH_SAE)
4308                                         ifmgd->auth_data->timeout =
4309                                                 jiffies +
4310                                                 IEEE80211_AUTH_TIMEOUT_SAE;
4311                                 else
4312                                         ifmgd->auth_data->timeout =
4313                                                 jiffies +
4314                                                 IEEE80211_AUTH_TIMEOUT_SHORT;
4315                                 run_again(sdata, ifmgd->auth_data->timeout);
4316                         } else {
4317                                 ifmgd->auth_data->timeout = jiffies - 1;
4318                         }
4319                         ifmgd->auth_data->timeout_started = true;
4320                 } else if (ifmgd->assoc_data &&
4321                            (ieee80211_is_assoc_req(fc) ||
4322                             ieee80211_is_reassoc_req(fc))) {
4323                         if (status_acked) {
4324                                 ifmgd->assoc_data->timeout =
4325                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
4326                                 run_again(sdata, ifmgd->assoc_data->timeout);
4327                         } else {
4328                                 ifmgd->assoc_data->timeout = jiffies - 1;
4329                         }
4330                         ifmgd->assoc_data->timeout_started = true;
4331                 }
4332         }
4333
4334         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
4335             time_after(jiffies, ifmgd->auth_data->timeout)) {
4336                 if (ifmgd->auth_data->done) {
4337                         /*
4338                          * ok ... we waited for assoc but userspace didn't,
4339                          * so let's just kill the auth data
4340                          */
4341                         ieee80211_destroy_auth_data(sdata, false);
4342                 } else if (ieee80211_auth(sdata)) {
4343                         u8 bssid[ETH_ALEN];
4344                         struct ieee80211_event event = {
4345                                 .type = MLME_EVENT,
4346                                 .u.mlme.data = AUTH_EVENT,
4347                                 .u.mlme.status = MLME_TIMEOUT,
4348                         };
4349
4350                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
4351
4352                         ieee80211_destroy_auth_data(sdata, false);
4353
4354                         cfg80211_auth_timeout(sdata->dev, bssid);
4355                         drv_event_callback(sdata->local, sdata, &event);
4356                 }
4357         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
4358                 run_again(sdata, ifmgd->auth_data->timeout);
4359
4360         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
4361             time_after(jiffies, ifmgd->assoc_data->timeout)) {
4362                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
4363                     ieee80211_do_assoc(sdata)) {
4364                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4365                         struct ieee80211_event event = {
4366                                 .type = MLME_EVENT,
4367                                 .u.mlme.data = ASSOC_EVENT,
4368                                 .u.mlme.status = MLME_TIMEOUT,
4369                         };
4370
4371                         ieee80211_destroy_assoc_data(sdata, false, false);
4372                         cfg80211_assoc_timeout(sdata->dev, bss);
4373                         drv_event_callback(sdata->local, sdata, &event);
4374                 }
4375         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
4376                 run_again(sdata, ifmgd->assoc_data->timeout);
4377
4378         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
4379             ifmgd->associated) {
4380                 u8 bssid[ETH_ALEN];
4381                 int max_tries;
4382
4383                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4384
4385                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4386                         max_tries = max_nullfunc_tries;
4387                 else
4388                         max_tries = max_probe_tries;
4389
4390                 /* ACK received for nullfunc probing frame */
4391                 if (!ifmgd->probe_send_count)
4392                         ieee80211_reset_ap_probe(sdata);
4393                 else if (ifmgd->nullfunc_failed) {
4394                         if (ifmgd->probe_send_count < max_tries) {
4395                                 mlme_dbg(sdata,
4396                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
4397                                          bssid, ifmgd->probe_send_count,
4398                                          max_tries);
4399                                 ieee80211_mgd_probe_ap_send(sdata);
4400                         } else {
4401                                 mlme_dbg(sdata,
4402                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
4403                                          bssid);
4404                                 ieee80211_sta_connection_lost(sdata, bssid,
4405                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4406                                         false);
4407                         }
4408                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
4409                         run_again(sdata, ifmgd->probe_timeout);
4410                 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4411                         mlme_dbg(sdata,
4412                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
4413                                  bssid, probe_wait_ms);
4414                         ieee80211_sta_connection_lost(sdata, bssid,
4415                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4416                 } else if (ifmgd->probe_send_count < max_tries) {
4417                         mlme_dbg(sdata,
4418                                  "No probe response from AP %pM after %dms, try %d/%i\n",
4419                                  bssid, probe_wait_ms,
4420                                  ifmgd->probe_send_count, max_tries);
4421                         ieee80211_mgd_probe_ap_send(sdata);
4422                 } else {
4423                         /*
4424                          * We actually lost the connection ... or did we?
4425                          * Let's make sure!
4426                          */
4427                         mlme_dbg(sdata,
4428                                  "No probe response from AP %pM after %dms, disconnecting.\n",
4429                                  bssid, probe_wait_ms);
4430
4431                         ieee80211_sta_connection_lost(sdata, bssid,
4432                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4433                 }
4434         }
4435
4436         sdata_unlock(sdata);
4437 }
4438
4439 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
4440 {
4441         struct ieee80211_sub_if_data *sdata =
4442                 from_timer(sdata, t, u.mgd.bcn_mon_timer);
4443         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4444
4445         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4446                 return;
4447
4448         sdata->u.mgd.connection_loss = false;
4449         ieee80211_queue_work(&sdata->local->hw,
4450                              &sdata->u.mgd.beacon_connection_loss_work);
4451 }
4452
4453 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
4454 {
4455         struct ieee80211_sub_if_data *sdata =
4456                 from_timer(sdata, t, u.mgd.conn_mon_timer);
4457         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4458         struct ieee80211_local *local = sdata->local;
4459
4460         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4461                 return;
4462
4463         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4464 }
4465
4466 static void ieee80211_sta_monitor_work(struct work_struct *work)
4467 {
4468         struct ieee80211_sub_if_data *sdata =
4469                 container_of(work, struct ieee80211_sub_if_data,
4470                              u.mgd.monitor_work);
4471
4472         ieee80211_mgd_probe_ap(sdata, false);
4473 }
4474
4475 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4476 {
4477         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4478                 __ieee80211_stop_poll(sdata);
4479
4480                 /* let's probe the connection once */
4481                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4482                         ieee80211_queue_work(&sdata->local->hw,
4483                                              &sdata->u.mgd.monitor_work);
4484         }
4485 }
4486
4487 #ifdef CONFIG_PM
4488 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4489 {
4490         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4491         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4492
4493         sdata_lock(sdata);
4494
4495         if (ifmgd->auth_data || ifmgd->assoc_data) {
4496                 const u8 *bssid = ifmgd->auth_data ?
4497                                 ifmgd->auth_data->bss->bssid :
4498                                 ifmgd->assoc_data->bss->bssid;
4499
4500                 /*
4501                  * If we are trying to authenticate / associate while suspending,
4502                  * cfg80211 won't know and won't actually abort those attempts,
4503                  * thus we need to do that ourselves.
4504                  */
4505                 ieee80211_send_deauth_disassoc(sdata, bssid, bssid,
4506                                                IEEE80211_STYPE_DEAUTH,
4507                                                WLAN_REASON_DEAUTH_LEAVING,
4508                                                false, frame_buf);
4509                 if (ifmgd->assoc_data)
4510                         ieee80211_destroy_assoc_data(sdata, false, true);
4511                 if (ifmgd->auth_data)
4512                         ieee80211_destroy_auth_data(sdata, false);
4513                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4514                                       IEEE80211_DEAUTH_FRAME_LEN);
4515         }
4516
4517         /* This is a bit of a hack - we should find a better and more generic
4518          * solution to this. Normally when suspending, cfg80211 will in fact
4519          * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4520          * auth (not so important) or assoc (this is the problem) process.
4521          *
4522          * As a consequence, it can happen that we are in the process of both
4523          * associating and suspending, and receive an association response
4524          * after cfg80211 has checked if it needs to disconnect, but before
4525          * we actually set the flag to drop incoming frames. This will then
4526          * cause the workqueue flush to process the association response in
4527          * the suspend, resulting in a successful association just before it
4528          * tries to remove the interface from the driver, which now though
4529          * has a channel context assigned ... this results in issues.
4530          *
4531          * To work around this (for now) simply deauth here again if we're
4532          * now connected.
4533          */
4534         if (ifmgd->associated && !sdata->local->wowlan) {
4535                 u8 bssid[ETH_ALEN];
4536                 struct cfg80211_deauth_request req = {
4537                         .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4538                         .bssid = bssid,
4539                 };
4540
4541                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4542                 ieee80211_mgd_deauth(sdata, &req);
4543         }
4544
4545         sdata_unlock(sdata);
4546 }
4547
4548 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4549 {
4550         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4551
4552         sdata_lock(sdata);
4553         if (!ifmgd->associated) {
4554                 sdata_unlock(sdata);
4555                 return;
4556         }
4557
4558         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4559                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4560                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4561                 ieee80211_sta_connection_lost(sdata,
4562                                               ifmgd->associated->bssid,
4563                                               WLAN_REASON_UNSPECIFIED,
4564                                               true);
4565                 sdata_unlock(sdata);
4566                 return;
4567         }
4568         sdata_unlock(sdata);
4569 }
4570 #endif
4571
4572 /* interface setup */
4573 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4574 {
4575         struct ieee80211_if_managed *ifmgd;
4576
4577         ifmgd = &sdata->u.mgd;
4578         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4579         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4580         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4581                   ieee80211_beacon_connection_loss_work);
4582         INIT_WORK(&ifmgd->csa_connection_drop_work,
4583                   ieee80211_csa_connection_drop_work);
4584         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4585         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4586                           ieee80211_tdls_peer_del_work);
4587         timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
4588         timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
4589         timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
4590         timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
4591         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4592                           ieee80211_sta_handle_tspec_ac_params_wk);
4593
4594         ifmgd->flags = 0;
4595         ifmgd->powersave = sdata->wdev.ps;
4596         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4597         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4598         ifmgd->p2p_noa_index = -1;
4599
4600         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4601                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4602         else
4603                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4604
4605         /* Setup TDLS data */
4606         spin_lock_init(&ifmgd->teardown_lock);
4607         ifmgd->teardown_skb = NULL;
4608         ifmgd->orig_teardown_skb = NULL;
4609 }
4610
4611 /* scan finished notification */
4612 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4613 {
4614         struct ieee80211_sub_if_data *sdata;
4615
4616         /* Restart STA timers */
4617         rcu_read_lock();
4618         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4619                 if (ieee80211_sdata_running(sdata))
4620                         ieee80211_restart_sta_timer(sdata);
4621         }
4622         rcu_read_unlock();
4623 }
4624
4625 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4626                                      struct cfg80211_bss *cbss)
4627 {
4628         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4629         const u8 *ht_cap_ie, *vht_cap_ie;
4630         const struct ieee80211_ht_cap *ht_cap;
4631         const struct ieee80211_vht_cap *vht_cap;
4632         u8 chains = 1;
4633
4634         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4635                 return chains;
4636
4637         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4638         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4639                 ht_cap = (void *)(ht_cap_ie + 2);
4640                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4641                 /*
4642                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4643                  *       "Tx Unequal Modulation Supported" fields.
4644                  */
4645         }
4646
4647         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4648                 return chains;
4649
4650         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4651         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4652                 u8 nss;
4653                 u16 tx_mcs_map;
4654
4655                 vht_cap = (void *)(vht_cap_ie + 2);
4656                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4657                 for (nss = 8; nss > 0; nss--) {
4658                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4659                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4660                                 break;
4661                 }
4662                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4663                 chains = max(chains, nss);
4664         }
4665
4666         return chains;
4667 }
4668
4669 static bool
4670 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband,
4671                                     const struct ieee80211_he_operation *he_op)
4672 {
4673         const struct ieee80211_sta_he_cap *sta_he_cap =
4674                 ieee80211_get_he_sta_cap(sband);
4675         u16 ap_min_req_set;
4676         int i;
4677
4678         if (!sta_he_cap || !he_op)
4679                 return false;
4680
4681         ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4682
4683         /* Need to go over for 80MHz, 160MHz and for 80+80 */
4684         for (i = 0; i < 3; i++) {
4685                 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
4686                         &sta_he_cap->he_mcs_nss_supp;
4687                 u16 sta_mcs_map_rx =
4688                         le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
4689                 u16 sta_mcs_map_tx =
4690                         le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
4691                 u8 nss;
4692                 bool verified = true;
4693
4694                 /*
4695                  * For each band there is a maximum of 8 spatial streams
4696                  * possible. Each of the sta_mcs_map_* is a 16-bit struct built
4697                  * of 2 bits per NSS (1-8), with the values defined in enum
4698                  * ieee80211_he_mcs_support. Need to make sure STA TX and RX
4699                  * capabilities aren't less than the AP's minimum requirements
4700                  * for this HE BSS per SS.
4701                  * It is enough to find one such band that meets the reqs.
4702                  */
4703                 for (nss = 8; nss > 0; nss--) {
4704                         u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
4705                         u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
4706                         u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4707
4708                         if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4709                                 continue;
4710
4711                         /*
4712                          * Make sure the HE AP doesn't require MCSs that aren't
4713                          * supported by the client
4714                          */
4715                         if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4716                             sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4717                             (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
4718                                 verified = false;
4719                                 break;
4720                         }
4721                 }
4722
4723                 if (verified)
4724                         return true;
4725         }
4726
4727         /* If here, STA doesn't meet AP's HE min requirements */
4728         return false;
4729 }
4730
4731 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4732                                   struct cfg80211_bss *cbss)
4733 {
4734         struct ieee80211_local *local = sdata->local;
4735         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4736         const struct ieee80211_ht_cap *ht_cap = NULL;
4737         const struct ieee80211_ht_operation *ht_oper = NULL;
4738         const struct ieee80211_vht_operation *vht_oper = NULL;
4739         const struct ieee80211_he_operation *he_oper = NULL;
4740         struct ieee80211_supported_band *sband;
4741         struct cfg80211_chan_def chandef;
4742         int ret;
4743         u32 i;
4744         bool have_80mhz;
4745
4746         sband = local->hw.wiphy->bands[cbss->channel->band];
4747
4748         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4749                           IEEE80211_STA_DISABLE_80P80MHZ |
4750                           IEEE80211_STA_DISABLE_160MHZ);
4751
4752         rcu_read_lock();
4753
4754         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4755             sband->ht_cap.ht_supported) {
4756                 const u8 *ht_oper_ie, *ht_cap_ie;
4757
4758                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4759                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4760                         ht_oper = (void *)(ht_oper_ie + 2);
4761
4762                 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4763                 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4764                         ht_cap = (void *)(ht_cap_ie + 2);
4765
4766                 if (!ht_cap) {
4767                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4768                         ht_oper = NULL;
4769                 }
4770         }
4771
4772         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4773             sband->vht_cap.vht_supported) {
4774                 const u8 *vht_oper_ie, *vht_cap;
4775
4776                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4777                                                    WLAN_EID_VHT_OPERATION);
4778                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4779                         vht_oper = (void *)(vht_oper_ie + 2);
4780                 if (vht_oper && !ht_oper) {
4781                         vht_oper = NULL;
4782                         sdata_info(sdata,
4783                                    "AP advertised VHT without HT, disabling both\n");
4784                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4785                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4786                 }
4787
4788                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4789                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4790                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4791                         vht_oper = NULL;
4792                 }
4793         }
4794
4795         if (!ieee80211_get_he_sta_cap(sband))
4796                 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4797
4798         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) {
4799                 const struct cfg80211_bss_ies *ies;
4800                 const u8 *he_oper_ie;
4801
4802                 ies = rcu_dereference(cbss->ies);
4803                 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION,
4804                                                   ies->data, ies->len);
4805                 if (he_oper_ie &&
4806                     he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3]))
4807                         he_oper = (void *)(he_oper_ie + 3);
4808                 else
4809                         he_oper = NULL;
4810
4811                 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper))
4812                         ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4813         }
4814
4815         /* Allow VHT if at least one channel on the sband supports 80 MHz */
4816         have_80mhz = false;
4817         for (i = 0; i < sband->n_channels; i++) {
4818                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4819                                                 IEEE80211_CHAN_NO_80MHZ))
4820                         continue;
4821
4822                 have_80mhz = true;
4823                 break;
4824         }
4825
4826         if (!have_80mhz)
4827                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4828
4829         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4830                                                      cbss->channel,
4831                                                      ht_oper, vht_oper, he_oper,
4832                                                      &chandef, false);
4833
4834         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4835                                       local->rx_chains);
4836
4837         rcu_read_unlock();
4838
4839         /* will change later if needed */
4840         sdata->smps_mode = IEEE80211_SMPS_OFF;
4841
4842         mutex_lock(&local->mtx);
4843         /*
4844          * If this fails (possibly due to channel context sharing
4845          * on incompatible channels, e.g. 80+80 and 160 sharing the
4846          * same control channel) try to use a smaller bandwidth.
4847          */
4848         ret = ieee80211_vif_use_channel(sdata, &chandef,
4849                                         IEEE80211_CHANCTX_SHARED);
4850
4851         /* don't downgrade for 5 and 10 MHz channels, though. */
4852         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4853             chandef.width == NL80211_CHAN_WIDTH_10)
4854                 goto out;
4855
4856         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4857                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4858                 ret = ieee80211_vif_use_channel(sdata, &chandef,
4859                                                 IEEE80211_CHANCTX_SHARED);
4860         }
4861  out:
4862         mutex_unlock(&local->mtx);
4863         return ret;
4864 }
4865
4866 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies,
4867                                u8 *dtim_count, u8 *dtim_period)
4868 {
4869         const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len);
4870         const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data,
4871                                          ies->len);
4872         const struct ieee80211_tim_ie *tim = NULL;
4873         const struct ieee80211_bssid_index *idx;
4874         bool valid = tim_ie && tim_ie[1] >= 2;
4875
4876         if (valid)
4877                 tim = (void *)(tim_ie + 2);
4878
4879         if (dtim_count)
4880                 *dtim_count = valid ? tim->dtim_count : 0;
4881
4882         if (dtim_period)
4883                 *dtim_period = valid ? tim->dtim_period : 0;
4884
4885         /* Check if value is overridden by non-transmitted profile */
4886         if (!idx_ie || idx_ie[1] < 3)
4887                 return valid;
4888
4889         idx = (void *)(idx_ie + 2);
4890
4891         if (dtim_count)
4892                 *dtim_count = idx->dtim_count;
4893
4894         if (dtim_period)
4895                 *dtim_period = idx->dtim_period;
4896
4897         return true;
4898 }
4899
4900 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4901                                      struct cfg80211_bss *cbss, bool assoc,
4902                                      bool override)
4903 {
4904         struct ieee80211_local *local = sdata->local;
4905         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4906         struct ieee80211_bss *bss = (void *)cbss->priv;
4907         struct sta_info *new_sta = NULL;
4908         struct ieee80211_supported_band *sband;
4909         bool have_sta = false;
4910         int err;
4911
4912         sband = local->hw.wiphy->bands[cbss->channel->band];
4913
4914         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4915                 return -EINVAL;
4916
4917         /* If a reconfig is happening, bail out */
4918         if (local->in_reconfig)
4919                 return -EBUSY;
4920
4921         if (assoc) {
4922                 rcu_read_lock();
4923                 have_sta = sta_info_get(sdata, cbss->bssid);
4924                 rcu_read_unlock();
4925         }
4926
4927         if (!have_sta) {
4928                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4929                 if (!new_sta)
4930                         return -ENOMEM;
4931         }
4932
4933         /*
4934          * Set up the information for the new channel before setting the
4935          * new channel. We can't - completely race-free - change the basic
4936          * rates bitmap and the channel (sband) that it refers to, but if
4937          * we set it up before we at least avoid calling into the driver's
4938          * bss_info_changed() method with invalid information (since we do
4939          * call that from changing the channel - only for IDLE and perhaps
4940          * some others, but ...).
4941          *
4942          * So to avoid that, just set up all the new information before the
4943          * channel, but tell the driver to apply it only afterwards, since
4944          * it might need the new channel for that.
4945          */
4946         if (new_sta) {
4947                 u32 rates = 0, basic_rates = 0;
4948                 bool have_higher_than_11mbit;
4949                 int min_rate = INT_MAX, min_rate_index = -1;
4950                 const struct cfg80211_bss_ies *ies;
4951                 int shift = ieee80211_vif_get_shift(&sdata->vif);
4952
4953                 ieee80211_get_rates(sband, bss->supp_rates,
4954                                     bss->supp_rates_len,
4955                                     &rates, &basic_rates,
4956                                     &have_higher_than_11mbit,
4957                                     &min_rate, &min_rate_index,
4958                                     shift);
4959
4960                 /*
4961                  * This used to be a workaround for basic rates missing
4962                  * in the association response frame. Now that we no
4963                  * longer use the basic rates from there, it probably
4964                  * doesn't happen any more, but keep the workaround so
4965                  * in case some *other* APs are buggy in different ways
4966                  * we can connect -- with a warning.
4967                  */
4968                 if (!basic_rates && min_rate_index >= 0) {
4969                         sdata_info(sdata,
4970                                    "No basic rates, using min rate instead\n");
4971                         basic_rates = BIT(min_rate_index);
4972                 }
4973
4974                 if (rates)
4975                         new_sta->sta.supp_rates[cbss->channel->band] = rates;
4976                 else
4977                         sdata_info(sdata,
4978                                    "No rates found, keeping mandatory only\n");
4979
4980                 sdata->vif.bss_conf.basic_rates = basic_rates;
4981
4982                 /* cf. IEEE 802.11 9.2.12 */
4983                 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4984                     have_higher_than_11mbit)
4985                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4986                 else
4987                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4988
4989                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4990
4991                 /* set timing information */
4992                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4993                 rcu_read_lock();
4994                 ies = rcu_dereference(cbss->beacon_ies);
4995                 if (ies) {
4996                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4997                         sdata->vif.bss_conf.sync_device_ts =
4998                                 bss->device_ts_beacon;
4999
5000                         ieee80211_get_dtim(ies,
5001                                            &sdata->vif.bss_conf.sync_dtim_count,
5002                                            NULL);
5003                 } else if (!ieee80211_hw_check(&sdata->local->hw,
5004                                                TIMING_BEACON_ONLY)) {
5005                         ies = rcu_dereference(cbss->proberesp_ies);
5006                         /* must be non-NULL since beacon IEs were NULL */
5007                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
5008                         sdata->vif.bss_conf.sync_device_ts =
5009                                 bss->device_ts_presp;
5010                         sdata->vif.bss_conf.sync_dtim_count = 0;
5011                 } else {
5012                         sdata->vif.bss_conf.sync_tsf = 0;
5013                         sdata->vif.bss_conf.sync_device_ts = 0;
5014                         sdata->vif.bss_conf.sync_dtim_count = 0;
5015                 }
5016                 rcu_read_unlock();
5017         }
5018
5019         if (new_sta || override) {
5020                 err = ieee80211_prep_channel(sdata, cbss);
5021                 if (err) {
5022                         if (new_sta)
5023                                 sta_info_free(local, new_sta);
5024                         return -EINVAL;
5025                 }
5026         }
5027
5028         if (new_sta) {
5029                 /*
5030                  * tell driver about BSSID, basic rates and timing
5031                  * this was set up above, before setting the channel
5032                  */
5033                 ieee80211_bss_info_change_notify(sdata,
5034                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
5035                         BSS_CHANGED_BEACON_INT);
5036
5037                 if (assoc)
5038                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
5039
5040                 err = sta_info_insert(new_sta);
5041                 new_sta = NULL;
5042                 if (err) {
5043                         sdata_info(sdata,
5044                                    "failed to insert STA entry for the AP (error %d)\n",
5045                                    err);
5046                         return err;
5047                 }
5048         } else
5049                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
5050
5051         /* Cancel scan to ensure that nothing interferes with connection */
5052         if (local->scanning)
5053                 ieee80211_scan_cancel(local);
5054
5055         return 0;
5056 }
5057
5058 /* config hooks */
5059 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
5060                        struct cfg80211_auth_request *req)
5061 {
5062         struct ieee80211_local *local = sdata->local;
5063         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5064         struct ieee80211_mgd_auth_data *auth_data;
5065         u16 auth_alg;
5066         int err;
5067         bool cont_auth;
5068
5069         /* prepare auth data structure */
5070
5071         switch (req->auth_type) {
5072         case NL80211_AUTHTYPE_OPEN_SYSTEM:
5073                 auth_alg = WLAN_AUTH_OPEN;
5074                 break;
5075         case NL80211_AUTHTYPE_SHARED_KEY:
5076                 if (fips_enabled)
5077                         return -EOPNOTSUPP;
5078                 auth_alg = WLAN_AUTH_SHARED_KEY;
5079                 break;
5080         case NL80211_AUTHTYPE_FT:
5081                 auth_alg = WLAN_AUTH_FT;
5082                 break;
5083         case NL80211_AUTHTYPE_NETWORK_EAP:
5084                 auth_alg = WLAN_AUTH_LEAP;
5085                 break;
5086         case NL80211_AUTHTYPE_SAE:
5087                 auth_alg = WLAN_AUTH_SAE;
5088                 break;
5089         case NL80211_AUTHTYPE_FILS_SK:
5090                 auth_alg = WLAN_AUTH_FILS_SK;
5091                 break;
5092         case NL80211_AUTHTYPE_FILS_SK_PFS:
5093                 auth_alg = WLAN_AUTH_FILS_SK_PFS;
5094                 break;
5095         case NL80211_AUTHTYPE_FILS_PK:
5096                 auth_alg = WLAN_AUTH_FILS_PK;
5097                 break;
5098         default:
5099                 return -EOPNOTSUPP;
5100         }
5101
5102         if (ifmgd->assoc_data)
5103                 return -EBUSY;
5104
5105         auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
5106                             req->ie_len, GFP_KERNEL);
5107         if (!auth_data)
5108                 return -ENOMEM;
5109
5110         auth_data->bss = req->bss;
5111
5112         if (req->auth_data_len >= 4) {
5113                 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
5114                         __le16 *pos = (__le16 *) req->auth_data;
5115
5116                         auth_data->sae_trans = le16_to_cpu(pos[0]);
5117                         auth_data->sae_status = le16_to_cpu(pos[1]);
5118                 }
5119                 memcpy(auth_data->data, req->auth_data + 4,
5120                        req->auth_data_len - 4);
5121                 auth_data->data_len += req->auth_data_len - 4;
5122         }
5123
5124         /* Check if continuing authentication or trying to authenticate with the
5125          * same BSS that we were in the process of authenticating with and avoid
5126          * removal and re-addition of the STA entry in
5127          * ieee80211_prep_connection().
5128          */
5129         cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss;
5130
5131         if (req->ie && req->ie_len) {
5132                 memcpy(&auth_data->data[auth_data->data_len],
5133                        req->ie, req->ie_len);
5134                 auth_data->data_len += req->ie_len;
5135         }
5136
5137         if (req->key && req->key_len) {
5138                 auth_data->key_len = req->key_len;
5139                 auth_data->key_idx = req->key_idx;
5140                 memcpy(auth_data->key, req->key, req->key_len);
5141         }
5142
5143         auth_data->algorithm = auth_alg;
5144
5145         /* try to authenticate/probe */
5146
5147         if (ifmgd->auth_data) {
5148                 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
5149                         auth_data->peer_confirmed =
5150                                 ifmgd->auth_data->peer_confirmed;
5151                 }
5152                 ieee80211_destroy_auth_data(sdata, cont_auth);
5153         }
5154
5155         /* prep auth_data so we don't go into idle on disassoc */
5156         ifmgd->auth_data = auth_data;
5157
5158         /* If this is continuation of an ongoing SAE authentication exchange
5159          * (i.e., request to send SAE Confirm) and the peer has already
5160          * confirmed, mark authentication completed since we are about to send
5161          * out SAE Confirm.
5162          */
5163         if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
5164             auth_data->peer_confirmed && auth_data->sae_trans == 2)
5165                 ieee80211_mark_sta_auth(sdata, req->bss->bssid);
5166
5167         if (ifmgd->associated) {
5168                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5169
5170                 sdata_info(sdata,
5171                            "disconnect from AP %pM for new auth to %pM\n",
5172                            ifmgd->associated->bssid, req->bss->bssid);
5173                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5174                                        WLAN_REASON_UNSPECIFIED,
5175                                        false, frame_buf);
5176
5177                 ieee80211_report_disconnect(sdata, frame_buf,
5178                                             sizeof(frame_buf), true,
5179                                             WLAN_REASON_UNSPECIFIED);
5180         }
5181
5182         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
5183
5184         err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false);
5185         if (err)
5186                 goto err_clear;
5187
5188         err = ieee80211_auth(sdata);
5189         if (err) {
5190                 sta_info_destroy_addr(sdata, req->bss->bssid);
5191                 goto err_clear;
5192         }
5193
5194         /* hold our own reference */
5195         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
5196         return 0;
5197
5198  err_clear:
5199         eth_zero_addr(ifmgd->bssid);
5200         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5201         ifmgd->auth_data = NULL;
5202         mutex_lock(&sdata->local->mtx);
5203         ieee80211_vif_release_channel(sdata);
5204         mutex_unlock(&sdata->local->mtx);
5205         kfree(auth_data);
5206         return err;
5207 }
5208
5209 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
5210                         struct cfg80211_assoc_request *req)
5211 {
5212         struct ieee80211_local *local = sdata->local;
5213         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5214         struct ieee80211_bss *bss = (void *)req->bss->priv;
5215         struct ieee80211_mgd_assoc_data *assoc_data;
5216         const struct cfg80211_bss_ies *beacon_ies;
5217         struct ieee80211_supported_band *sband;
5218         const u8 *ssidie, *ht_ie, *vht_ie;
5219         int i, err;
5220         bool override = false;
5221
5222         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
5223         if (!assoc_data)
5224                 return -ENOMEM;
5225
5226         rcu_read_lock();
5227         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
5228         if (!ssidie || ssidie[1] > sizeof(assoc_data->ssid)) {
5229                 rcu_read_unlock();
5230                 kfree(assoc_data);
5231                 return -EINVAL;
5232         }
5233         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
5234         assoc_data->ssid_len = ssidie[1];
5235         rcu_read_unlock();
5236
5237         if (ifmgd->associated) {
5238                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5239
5240                 sdata_info(sdata,
5241                            "disconnect from AP %pM for new assoc to %pM\n",
5242                            ifmgd->associated->bssid, req->bss->bssid);
5243                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5244                                        WLAN_REASON_UNSPECIFIED,
5245                                        false, frame_buf);
5246
5247                 ieee80211_report_disconnect(sdata, frame_buf,
5248                                             sizeof(frame_buf), true,
5249                                             WLAN_REASON_UNSPECIFIED);
5250         }
5251
5252         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
5253                 err = -EBUSY;
5254                 goto err_free;
5255         }
5256
5257         if (ifmgd->assoc_data) {
5258                 err = -EBUSY;
5259                 goto err_free;
5260         }
5261
5262         if (ifmgd->auth_data) {
5263                 bool match;
5264
5265                 /* keep sta info, bssid if matching */
5266                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
5267                 ieee80211_destroy_auth_data(sdata, match);
5268         }
5269
5270         /* prepare assoc data */
5271
5272         ifmgd->beacon_crc_valid = false;
5273
5274         assoc_data->wmm = bss->wmm_used &&
5275                           (local->hw.queues >= IEEE80211_NUM_ACS);
5276
5277         /*
5278          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
5279          * We still associate in non-HT mode (11a/b/g) if any one of these
5280          * ciphers is configured as pairwise.
5281          * We can set this to true for non-11n hardware, that'll be checked
5282          * separately along with the peer capabilities.
5283          */
5284         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
5285                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
5286                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
5287                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5288                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5289                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5290                         ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5291                         netdev_info(sdata->dev,
5292                                     "disabling HT/VHT/HE due to WEP/TKIP use\n");
5293                 }
5294         }
5295
5296         /* Also disable HT if we don't support it or the AP doesn't use WMM */
5297         sband = local->hw.wiphy->bands[req->bss->channel->band];
5298         if (!sband->ht_cap.ht_supported ||
5299             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5300             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5301                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5302                 if (!bss->wmm_used &&
5303                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5304                         netdev_info(sdata->dev,
5305                                     "disabling HT as WMM/QoS is not supported by the AP\n");
5306         }
5307
5308         /* disable VHT if we don't support it or the AP doesn't use WMM */
5309         if (!sband->vht_cap.vht_supported ||
5310             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5311             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5312                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5313                 if (!bss->wmm_used &&
5314                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5315                         netdev_info(sdata->dev,
5316                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
5317         }
5318
5319         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
5320         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
5321                sizeof(ifmgd->ht_capa_mask));
5322
5323         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
5324         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
5325                sizeof(ifmgd->vht_capa_mask));
5326
5327         if (req->ie && req->ie_len) {
5328                 memcpy(assoc_data->ie, req->ie, req->ie_len);
5329                 assoc_data->ie_len = req->ie_len;
5330         }
5331
5332         if (req->fils_kek) {
5333                 /* should already be checked in cfg80211 - so warn */
5334                 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
5335                         err = -EINVAL;
5336                         goto err_free;
5337                 }
5338                 memcpy(assoc_data->fils_kek, req->fils_kek,
5339                        req->fils_kek_len);
5340                 assoc_data->fils_kek_len = req->fils_kek_len;
5341         }
5342
5343         if (req->fils_nonces)
5344                 memcpy(assoc_data->fils_nonces, req->fils_nonces,
5345                        2 * FILS_NONCE_LEN);
5346
5347         assoc_data->bss = req->bss;
5348
5349         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
5350                 if (ifmgd->powersave)
5351                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
5352                 else
5353                         sdata->smps_mode = IEEE80211_SMPS_OFF;
5354         } else
5355                 sdata->smps_mode = ifmgd->req_smps;
5356
5357         assoc_data->capability = req->bss->capability;
5358         assoc_data->supp_rates = bss->supp_rates;
5359         assoc_data->supp_rates_len = bss->supp_rates_len;
5360
5361         rcu_read_lock();
5362         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
5363         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
5364                 assoc_data->ap_ht_param =
5365                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
5366         else
5367                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5368         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
5369         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
5370                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
5371                        sizeof(struct ieee80211_vht_cap));
5372         else
5373                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5374         rcu_read_unlock();
5375
5376         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
5377                  ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
5378              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
5379                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
5380
5381         if (bss->wmm_used && bss->uapsd_supported &&
5382             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
5383                 assoc_data->uapsd = true;
5384                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
5385         } else {
5386                 assoc_data->uapsd = false;
5387                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
5388         }
5389
5390         if (req->prev_bssid)
5391                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
5392
5393         if (req->use_mfp) {
5394                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
5395                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
5396         } else {
5397                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
5398                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
5399         }
5400
5401         if (req->flags & ASSOC_REQ_USE_RRM)
5402                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
5403         else
5404                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
5405
5406         if (req->crypto.control_port)
5407                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
5408         else
5409                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
5410
5411         sdata->control_port_protocol = req->crypto.control_port_ethertype;
5412         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
5413         sdata->control_port_over_nl80211 =
5414                                         req->crypto.control_port_over_nl80211;
5415         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
5416                                                         sdata->vif.type);
5417
5418         /* kick off associate process */
5419
5420         ifmgd->assoc_data = assoc_data;
5421         ifmgd->dtim_period = 0;
5422         ifmgd->have_beacon = false;
5423
5424         /* override HT/VHT configuration only if the AP and we support it */
5425         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
5426                 struct ieee80211_sta_ht_cap sta_ht_cap;
5427
5428                 if (req->flags & ASSOC_REQ_DISABLE_HT)
5429                         override = true;
5430
5431                 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
5432                 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
5433
5434                 /* check for 40 MHz disable override */
5435                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
5436                     sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
5437                     !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
5438                         override = true;
5439
5440                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
5441                     req->flags & ASSOC_REQ_DISABLE_VHT)
5442                         override = true;
5443         }
5444
5445         if (req->flags & ASSOC_REQ_DISABLE_HT) {
5446                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5447                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5448         }
5449
5450         if (req->flags & ASSOC_REQ_DISABLE_VHT)
5451                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5452
5453         err = ieee80211_prep_connection(sdata, req->bss, true, override);
5454         if (err)
5455                 goto err_clear;
5456
5457         rcu_read_lock();
5458         beacon_ies = rcu_dereference(req->bss->beacon_ies);
5459
5460         if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
5461             !beacon_ies) {
5462                 /*
5463                  * Wait up to one beacon interval ...
5464                  * should this be more if we miss one?
5465                  */
5466                 sdata_info(sdata, "waiting for beacon from %pM\n",
5467                            ifmgd->bssid);
5468                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
5469                 assoc_data->timeout_started = true;
5470                 assoc_data->need_beacon = true;
5471         } else if (beacon_ies) {
5472                 const u8 *ie;
5473                 u8 dtim_count = 0;
5474
5475                 ieee80211_get_dtim(beacon_ies, &dtim_count,
5476                                    &ifmgd->dtim_period);
5477
5478                 ifmgd->have_beacon = true;
5479                 assoc_data->timeout = jiffies;
5480                 assoc_data->timeout_started = true;
5481
5482                 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5483                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
5484                         sdata->vif.bss_conf.sync_device_ts =
5485                                 bss->device_ts_beacon;
5486                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
5487                 }
5488
5489                 ie = cfg80211_find_ext_ie(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
5490                                           beacon_ies->data, beacon_ies->len);
5491                 if (ie && ie[1] >= 3)
5492                         sdata->vif.bss_conf.profile_periodicity = ie[4];
5493
5494                 ie = cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY,
5495                                       beacon_ies->data, beacon_ies->len);
5496                 if (ie && ie[1] >= 11 &&
5497                     (ie[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
5498                         sdata->vif.bss_conf.ema_ap = true;
5499         } else {
5500                 assoc_data->timeout = jiffies;
5501                 assoc_data->timeout_started = true;
5502         }
5503         rcu_read_unlock();
5504
5505         run_again(sdata, assoc_data->timeout);
5506
5507         if (bss->corrupt_data) {
5508                 char *corrupt_type = "data";
5509                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
5510                         if (bss->corrupt_data &
5511                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
5512                                 corrupt_type = "beacon and probe response";
5513                         else
5514                                 corrupt_type = "beacon";
5515                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
5516                         corrupt_type = "probe response";
5517                 sdata_info(sdata, "associating with AP with corrupt %s\n",
5518                            corrupt_type);
5519         }
5520
5521         return 0;
5522  err_clear:
5523         eth_zero_addr(ifmgd->bssid);
5524         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5525         ifmgd->assoc_data = NULL;
5526  err_free:
5527         kfree(assoc_data);
5528         return err;
5529 }
5530
5531 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
5532                          struct cfg80211_deauth_request *req)
5533 {
5534         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5535         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5536         bool tx = !req->local_state_change;
5537
5538         if (ifmgd->auth_data &&
5539             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
5540                 sdata_info(sdata,
5541                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
5542                            req->bssid, req->reason_code,
5543                            ieee80211_get_reason_code_string(req->reason_code));
5544
5545                 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5546                 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
5547                                                IEEE80211_STYPE_DEAUTH,
5548                                                req->reason_code, tx,
5549                                                frame_buf);
5550                 ieee80211_destroy_auth_data(sdata, false);
5551                 ieee80211_report_disconnect(sdata, frame_buf,
5552                                             sizeof(frame_buf), true,
5553                                             req->reason_code);
5554
5555                 return 0;
5556         }
5557
5558         if (ifmgd->assoc_data &&
5559             ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
5560                 sdata_info(sdata,
5561                            "aborting association with %pM by local choice (Reason: %u=%s)\n",
5562                            req->bssid, req->reason_code,
5563                            ieee80211_get_reason_code_string(req->reason_code));
5564
5565                 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5566                 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
5567                                                IEEE80211_STYPE_DEAUTH,
5568                                                req->reason_code, tx,
5569                                                frame_buf);
5570                 ieee80211_destroy_assoc_data(sdata, false, true);
5571                 ieee80211_report_disconnect(sdata, frame_buf,
5572                                             sizeof(frame_buf), true,
5573                                             req->reason_code);
5574                 return 0;
5575         }
5576
5577         if (ifmgd->associated &&
5578             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5579                 sdata_info(sdata,
5580                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5581                            req->bssid, req->reason_code,
5582                            ieee80211_get_reason_code_string(req->reason_code));
5583
5584                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5585                                        req->reason_code, tx, frame_buf);
5586                 ieee80211_report_disconnect(sdata, frame_buf,
5587                                             sizeof(frame_buf), true,
5588                                             req->reason_code);
5589                 return 0;
5590         }
5591
5592         return -ENOTCONN;
5593 }
5594
5595 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5596                            struct cfg80211_disassoc_request *req)
5597 {
5598         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5599         u8 bssid[ETH_ALEN];
5600         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5601
5602         /*
5603          * cfg80211 should catch this ... but it's racy since
5604          * we can receive a disassoc frame, process it, hand it
5605          * to cfg80211 while that's in a locked section already
5606          * trying to tell us that the user wants to disconnect.
5607          */
5608         if (ifmgd->associated != req->bss)
5609                 return -ENOLINK;
5610
5611         sdata_info(sdata,
5612                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
5613                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5614
5615         memcpy(bssid, req->bss->bssid, ETH_ALEN);
5616         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5617                                req->reason_code, !req->local_state_change,
5618                                frame_buf);
5619
5620         ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5621                                     req->reason_code);
5622
5623         return 0;
5624 }
5625
5626 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5627 {
5628         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5629
5630         /*
5631          * Make sure some work items will not run after this,
5632          * they will not do anything but might not have been
5633          * cancelled when disconnecting.
5634          */
5635         cancel_work_sync(&ifmgd->monitor_work);
5636         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5637         cancel_work_sync(&ifmgd->request_smps_work);
5638         cancel_work_sync(&ifmgd->csa_connection_drop_work);
5639         cancel_work_sync(&ifmgd->chswitch_work);
5640         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5641
5642         sdata_lock(sdata);
5643         if (ifmgd->assoc_data) {
5644                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5645                 ieee80211_destroy_assoc_data(sdata, false, false);
5646                 cfg80211_assoc_timeout(sdata->dev, bss);
5647         }
5648         if (ifmgd->auth_data)
5649                 ieee80211_destroy_auth_data(sdata, false);
5650         spin_lock_bh(&ifmgd->teardown_lock);
5651         if (ifmgd->teardown_skb) {
5652                 kfree_skb(ifmgd->teardown_skb);
5653                 ifmgd->teardown_skb = NULL;
5654                 ifmgd->orig_teardown_skb = NULL;
5655         }
5656         kfree(ifmgd->assoc_req_ies);
5657         ifmgd->assoc_req_ies = NULL;
5658         ifmgd->assoc_req_ies_len = 0;
5659         spin_unlock_bh(&ifmgd->teardown_lock);
5660         del_timer_sync(&ifmgd->timer);
5661         sdata_unlock(sdata);
5662 }
5663
5664 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5665                                enum nl80211_cqm_rssi_threshold_event rssi_event,
5666                                s32 rssi_level,
5667                                gfp_t gfp)
5668 {
5669         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5670
5671         trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5672
5673         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5674 }
5675 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5676
5677 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5678 {
5679         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5680
5681         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5682
5683         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5684 }
5685 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);