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