Merge commit 'c1e140bf79d817d4a7aa9932eb98b0359c87af33' from mac80211-next
[cascardo/linux.git] / net / mac80211 / mlme.c
1 /*
2  * BSS client mode implementation
3  * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4  * Copyright 2004, Instant802 Networks, Inc.
5  * Copyright 2005, Devicescape Software, Inc.
6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8  * Copyright 2013-2014  Intel Mobile Communications GmbH
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License version 2 as
12  * published by the Free Software Foundation.
13  */
14
15 #include <linux/delay.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/pm_qos.h>
23 #include <linux/crc32.h>
24 #include <linux/slab.h>
25 #include <linux/export.h>
26 #include <net/mac80211.h>
27 #include <asm/unaligned.h>
28
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
31 #include "rate.h"
32 #include "led.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_MAX_TRIES        3
38 #define IEEE80211_AUTH_WAIT_ASSOC       (HZ * 5)
39 #define IEEE80211_ASSOC_TIMEOUT         (HZ / 5)
40 #define IEEE80211_ASSOC_TIMEOUT_LONG    (HZ / 2)
41 #define IEEE80211_ASSOC_TIMEOUT_SHORT   (HZ / 10)
42 #define IEEE80211_ASSOC_MAX_TRIES       3
43
44 static int max_nullfunc_tries = 2;
45 module_param(max_nullfunc_tries, int, 0644);
46 MODULE_PARM_DESC(max_nullfunc_tries,
47                  "Maximum nullfunc tx tries before disconnecting (reason 4).");
48
49 static int max_probe_tries = 5;
50 module_param(max_probe_tries, int, 0644);
51 MODULE_PARM_DESC(max_probe_tries,
52                  "Maximum probe tries before disconnecting (reason 4).");
53
54 /*
55  * Beacon loss timeout is calculated as N frames times the
56  * advertised beacon interval.  This may need to be somewhat
57  * higher than what hardware might detect to account for
58  * delays in the host processing frames. But since we also
59  * probe on beacon miss before declaring the connection lost
60  * default to what we want.
61  */
62 static int beacon_loss_count = 7;
63 module_param(beacon_loss_count, int, 0644);
64 MODULE_PARM_DESC(beacon_loss_count,
65                  "Number of beacon intervals before we decide beacon was lost.");
66
67 /*
68  * Time the connection can be idle before we probe
69  * it to see if we can still talk to the AP.
70  */
71 #define IEEE80211_CONNECTION_IDLE_TIME  (30 * HZ)
72 /*
73  * Time we wait for a probe response after sending
74  * a probe request because of beacon loss or for
75  * checking the connection still works.
76  */
77 static int probe_wait_ms = 500;
78 module_param(probe_wait_ms, int, 0644);
79 MODULE_PARM_DESC(probe_wait_ms,
80                  "Maximum time(ms) to wait for probe response"
81                  " before disconnecting (reason 4).");
82
83 /*
84  * Weight given to the latest Beacon frame when calculating average signal
85  * strength for Beacon frames received in the current BSS. This must be
86  * between 1 and 15.
87  */
88 #define IEEE80211_SIGNAL_AVE_WEIGHT     3
89
90 /*
91  * How many Beacon frames need to have been used in average signal strength
92  * before starting to indicate signal change events.
93  */
94 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
95
96 /*
97  * We can have multiple work items (and connection probing)
98  * scheduling this timer, but we need to take care to only
99  * reschedule it when it should fire _earlier_ than it was
100  * asked for before, or if it's not pending right now. This
101  * function ensures that. Note that it then is required to
102  * run this function for all timeouts after the first one
103  * has happened -- the work that runs from this timer will
104  * do that.
105  */
106 static void run_again(struct ieee80211_sub_if_data *sdata,
107                       unsigned long timeout)
108 {
109         sdata_assert_lock(sdata);
110
111         if (!timer_pending(&sdata->u.mgd.timer) ||
112             time_before(timeout, sdata->u.mgd.timer.expires))
113                 mod_timer(&sdata->u.mgd.timer, timeout);
114 }
115
116 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
117 {
118         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
119                 return;
120
121         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
122                 return;
123
124         mod_timer(&sdata->u.mgd.bcn_mon_timer,
125                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
126 }
127
128 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
129 {
130         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
131
132         if (unlikely(!sdata->u.mgd.associated))
133                 return;
134
135         ifmgd->probe_send_count = 0;
136
137         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
138                 return;
139
140         mod_timer(&sdata->u.mgd.conn_mon_timer,
141                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
142 }
143
144 static int ecw2cw(int ecw)
145 {
146         return (1 << ecw) - 1;
147 }
148
149 static u32
150 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
151                              struct ieee80211_supported_band *sband,
152                              struct ieee80211_channel *channel,
153                              const struct ieee80211_ht_cap *ht_cap,
154                              const struct ieee80211_ht_operation *ht_oper,
155                              const struct ieee80211_vht_operation *vht_oper,
156                              struct cfg80211_chan_def *chandef, bool tracking)
157 {
158         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
159         struct cfg80211_chan_def vht_chandef;
160         struct ieee80211_sta_ht_cap sta_ht_cap;
161         u32 ht_cfreq, ret;
162
163         memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
164         ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
165
166         chandef->chan = channel;
167         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
168         chandef->center_freq1 = channel->center_freq;
169         chandef->center_freq2 = 0;
170
171         if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
172                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
173                 goto out;
174         }
175
176         chandef->width = NL80211_CHAN_WIDTH_20;
177
178         if (!(ht_cap->cap_info &
179               cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
180                 ret = IEEE80211_STA_DISABLE_40MHZ;
181                 vht_chandef = *chandef;
182                 goto out;
183         }
184
185         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
186                                                   channel->band);
187         /* check that channel matches the right operating channel */
188         if (!tracking && channel->center_freq != ht_cfreq) {
189                 /*
190                  * It's possible that some APs are confused here;
191                  * Netgear WNDR3700 sometimes reports 4 higher than
192                  * the actual channel in association responses, but
193                  * since we look at probe response/beacon data here
194                  * it should be OK.
195                  */
196                 sdata_info(sdata,
197                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
198                            channel->center_freq, ht_cfreq,
199                            ht_oper->primary_chan, channel->band);
200                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
201                 goto out;
202         }
203
204         /* check 40 MHz support, if we have it */
205         if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
206                 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
207                 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
208                         chandef->width = NL80211_CHAN_WIDTH_40;
209                         chandef->center_freq1 += 10;
210                         break;
211                 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
212                         chandef->width = NL80211_CHAN_WIDTH_40;
213                         chandef->center_freq1 -= 10;
214                         break;
215                 }
216         } else {
217                 /* 40 MHz (and 80 MHz) must be supported for VHT */
218                 ret = IEEE80211_STA_DISABLE_VHT;
219                 /* also mark 40 MHz disabled */
220                 ret |= IEEE80211_STA_DISABLE_40MHZ;
221                 goto out;
222         }
223
224         if (!vht_oper || !sband->vht_cap.vht_supported) {
225                 ret = IEEE80211_STA_DISABLE_VHT;
226                 goto out;
227         }
228
229         vht_chandef.chan = channel;
230         vht_chandef.center_freq1 =
231                 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
232                                                channel->band);
233         vht_chandef.center_freq2 = 0;
234
235         switch (vht_oper->chan_width) {
236         case IEEE80211_VHT_CHANWIDTH_USE_HT:
237                 vht_chandef.width = chandef->width;
238                 vht_chandef.center_freq1 = chandef->center_freq1;
239                 break;
240         case IEEE80211_VHT_CHANWIDTH_80MHZ:
241                 vht_chandef.width = NL80211_CHAN_WIDTH_80;
242                 break;
243         case IEEE80211_VHT_CHANWIDTH_160MHZ:
244                 vht_chandef.width = NL80211_CHAN_WIDTH_160;
245                 break;
246         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
247                 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
248                 vht_chandef.center_freq2 =
249                         ieee80211_channel_to_frequency(
250                                 vht_oper->center_freq_seg2_idx,
251                                 channel->band);
252                 break;
253         default:
254                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
255                         sdata_info(sdata,
256                                    "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
257                                    vht_oper->chan_width);
258                 ret = IEEE80211_STA_DISABLE_VHT;
259                 goto out;
260         }
261
262         if (!cfg80211_chandef_valid(&vht_chandef)) {
263                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
264                         sdata_info(sdata,
265                                    "AP VHT information is invalid, disable VHT\n");
266                 ret = IEEE80211_STA_DISABLE_VHT;
267                 goto out;
268         }
269
270         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
271                 ret = 0;
272                 goto out;
273         }
274
275         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
276                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
277                         sdata_info(sdata,
278                                    "AP VHT information doesn't match HT, disable VHT\n");
279                 ret = IEEE80211_STA_DISABLE_VHT;
280                 goto out;
281         }
282
283         *chandef = vht_chandef;
284
285         ret = 0;
286
287 out:
288         /*
289          * When tracking the current AP, don't do any further checks if the
290          * new chandef is identical to the one we're currently using for the
291          * connection. This keeps us from playing ping-pong with regulatory,
292          * without it the following can happen (for example):
293          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
294          *  - AP advertises regdom US
295          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
296          *  - the code below detects an unsupported channel, downgrades, and
297          *    we disconnect from the AP in the caller
298          *  - disconnect causes CRDA to reload world regdomain and the game
299          *    starts anew.
300          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
301          *
302          * It seems possible that there are still scenarios with CSA or real
303          * bandwidth changes where a this could happen, but those cases are
304          * less common and wouldn't completely prevent using the AP.
305          */
306         if (tracking &&
307             cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
308                 return ret;
309
310         /* don't print the message below for VHT mismatch if VHT is disabled */
311         if (ret & IEEE80211_STA_DISABLE_VHT)
312                 vht_chandef = *chandef;
313
314         /*
315          * Ignore the DISABLED flag when we're already connected and only
316          * tracking the APs beacon for bandwidth changes - otherwise we
317          * might get disconnected here if we connect to an AP, update our
318          * regulatory information based on the AP's country IE and the
319          * information we have is wrong/outdated and disables the channel
320          * that we're actually using for the connection to the AP.
321          */
322         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
323                                         tracking ? 0 :
324                                                    IEEE80211_CHAN_DISABLED)) {
325                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
326                         ret = IEEE80211_STA_DISABLE_HT |
327                               IEEE80211_STA_DISABLE_VHT;
328                         break;
329                 }
330
331                 ret |= ieee80211_chandef_downgrade(chandef);
332         }
333
334         if (chandef->width != vht_chandef.width && !tracking)
335                 sdata_info(sdata,
336                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
337
338         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
339         return ret;
340 }
341
342 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
343                                struct sta_info *sta,
344                                const struct ieee80211_ht_cap *ht_cap,
345                                const struct ieee80211_ht_operation *ht_oper,
346                                const struct ieee80211_vht_operation *vht_oper,
347                                const u8 *bssid, u32 *changed)
348 {
349         struct ieee80211_local *local = sdata->local;
350         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
351         struct ieee80211_supported_band *sband;
352         struct ieee80211_channel *chan;
353         struct cfg80211_chan_def chandef;
354         u16 ht_opmode;
355         u32 flags;
356         enum ieee80211_sta_rx_bandwidth new_sta_bw;
357         int ret;
358
359         /* if HT was/is disabled, don't track any bandwidth changes */
360         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
361                 return 0;
362
363         /* don't check VHT if we associated as non-VHT station */
364         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
365                 vht_oper = NULL;
366
367         if (WARN_ON_ONCE(!sta))
368                 return -EINVAL;
369
370         /*
371          * if bss configuration changed store the new one -
372          * this may be applicable even if channel is identical
373          */
374         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
375         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
376                 *changed |= BSS_CHANGED_HT;
377                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
378         }
379
380         chan = sdata->vif.bss_conf.chandef.chan;
381         sband = local->hw.wiphy->bands[chan->band];
382
383         /* calculate new channel (type) based on HT/VHT operation IEs */
384         flags = ieee80211_determine_chantype(sdata, sband, chan,
385                                              ht_cap, ht_oper, vht_oper,
386                                              &chandef, true);
387
388         /*
389          * Downgrade the new channel if we associated with restricted
390          * capabilities. For example, if we associated as a 20 MHz STA
391          * to a 40 MHz AP (due to regulatory, capabilities or config
392          * reasons) then switching to a 40 MHz channel now won't do us
393          * any good -- we couldn't use it with the AP.
394          */
395         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
396             chandef.width == NL80211_CHAN_WIDTH_80P80)
397                 flags |= ieee80211_chandef_downgrade(&chandef);
398         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
399             chandef.width == NL80211_CHAN_WIDTH_160)
400                 flags |= ieee80211_chandef_downgrade(&chandef);
401         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
402             chandef.width > NL80211_CHAN_WIDTH_20)
403                 flags |= ieee80211_chandef_downgrade(&chandef);
404
405         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
406                 return 0;
407
408         sdata_info(sdata,
409                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
410                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
411                    chandef.center_freq1, chandef.center_freq2);
412
413         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
414                                       IEEE80211_STA_DISABLE_VHT |
415                                       IEEE80211_STA_DISABLE_40MHZ |
416                                       IEEE80211_STA_DISABLE_80P80MHZ |
417                                       IEEE80211_STA_DISABLE_160MHZ)) ||
418             !cfg80211_chandef_valid(&chandef)) {
419                 sdata_info(sdata,
420                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
421                            ifmgd->bssid);
422                 return -EINVAL;
423         }
424
425         switch (chandef.width) {
426         case NL80211_CHAN_WIDTH_20_NOHT:
427         case NL80211_CHAN_WIDTH_20:
428                 new_sta_bw = IEEE80211_STA_RX_BW_20;
429                 break;
430         case NL80211_CHAN_WIDTH_40:
431                 new_sta_bw = IEEE80211_STA_RX_BW_40;
432                 break;
433         case NL80211_CHAN_WIDTH_80:
434                 new_sta_bw = IEEE80211_STA_RX_BW_80;
435                 break;
436         case NL80211_CHAN_WIDTH_80P80:
437         case NL80211_CHAN_WIDTH_160:
438                 new_sta_bw = IEEE80211_STA_RX_BW_160;
439                 break;
440         default:
441                 return -EINVAL;
442         }
443
444         if (new_sta_bw > sta->cur_max_bandwidth)
445                 new_sta_bw = sta->cur_max_bandwidth;
446
447         if (new_sta_bw < sta->sta.bandwidth) {
448                 sta->sta.bandwidth = new_sta_bw;
449                 rate_control_rate_update(local, sband, sta,
450                                          IEEE80211_RC_BW_CHANGED);
451         }
452
453         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
454         if (ret) {
455                 sdata_info(sdata,
456                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
457                            ifmgd->bssid);
458                 return ret;
459         }
460
461         if (new_sta_bw > sta->sta.bandwidth) {
462                 sta->sta.bandwidth = new_sta_bw;
463                 rate_control_rate_update(local, sband, sta,
464                                          IEEE80211_RC_BW_CHANGED);
465         }
466
467         return 0;
468 }
469
470 /* frame sending functions */
471
472 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
473                                 struct sk_buff *skb, u8 ap_ht_param,
474                                 struct ieee80211_supported_band *sband,
475                                 struct ieee80211_channel *channel,
476                                 enum ieee80211_smps_mode smps)
477 {
478         u8 *pos;
479         u32 flags = channel->flags;
480         u16 cap;
481         struct ieee80211_sta_ht_cap ht_cap;
482
483         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
484
485         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
486         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
487
488         /* determine capability flags */
489         cap = ht_cap.cap;
490
491         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
492         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
493                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
494                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
495                         cap &= ~IEEE80211_HT_CAP_SGI_40;
496                 }
497                 break;
498         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
499                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
500                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
501                         cap &= ~IEEE80211_HT_CAP_SGI_40;
502                 }
503                 break;
504         }
505
506         /*
507          * If 40 MHz was disabled associate as though we weren't
508          * capable of 40 MHz -- some broken APs will never fall
509          * back to trying to transmit in 20 MHz.
510          */
511         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
512                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
513                 cap &= ~IEEE80211_HT_CAP_SGI_40;
514         }
515
516         /* set SM PS mode properly */
517         cap &= ~IEEE80211_HT_CAP_SM_PS;
518         switch (smps) {
519         case IEEE80211_SMPS_AUTOMATIC:
520         case IEEE80211_SMPS_NUM_MODES:
521                 WARN_ON(1);
522         case IEEE80211_SMPS_OFF:
523                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
524                         IEEE80211_HT_CAP_SM_PS_SHIFT;
525                 break;
526         case IEEE80211_SMPS_STATIC:
527                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
528                         IEEE80211_HT_CAP_SM_PS_SHIFT;
529                 break;
530         case IEEE80211_SMPS_DYNAMIC:
531                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
532                         IEEE80211_HT_CAP_SM_PS_SHIFT;
533                 break;
534         }
535
536         /* reserve and fill IE */
537         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
538         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
539 }
540
541 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
542                                  struct sk_buff *skb,
543                                  struct ieee80211_supported_band *sband,
544                                  struct ieee80211_vht_cap *ap_vht_cap)
545 {
546         u8 *pos;
547         u32 cap;
548         struct ieee80211_sta_vht_cap vht_cap;
549         u32 mask, ap_bf_sts, our_bf_sts;
550
551         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
552
553         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
554         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
555
556         /* determine capability flags */
557         cap = vht_cap.cap;
558
559         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
560                 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
561
562                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
563                 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
564                     bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
565                         cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
566         }
567
568         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
569                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
570                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
571         }
572
573         /*
574          * Some APs apparently get confused if our capabilities are better
575          * than theirs, so restrict what we advertise in the assoc request.
576          */
577         if (!(ap_vht_cap->vht_cap_info &
578                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
579                 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
580
581         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
582
583         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
584         our_bf_sts = cap & mask;
585
586         if (ap_bf_sts < our_bf_sts) {
587                 cap &= ~mask;
588                 cap |= ap_bf_sts;
589         }
590
591         /* reserve and fill IE */
592         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
593         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
594 }
595
596 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
597 {
598         struct ieee80211_local *local = sdata->local;
599         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
600         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
601         struct sk_buff *skb;
602         struct ieee80211_mgmt *mgmt;
603         u8 *pos, qos_info;
604         size_t offset = 0, noffset;
605         int i, count, rates_len, supp_rates_len, shift;
606         u16 capab;
607         struct ieee80211_supported_band *sband;
608         struct ieee80211_chanctx_conf *chanctx_conf;
609         struct ieee80211_channel *chan;
610         u32 rate_flags, rates = 0;
611
612         sdata_assert_lock(sdata);
613
614         rcu_read_lock();
615         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
616         if (WARN_ON(!chanctx_conf)) {
617                 rcu_read_unlock();
618                 return;
619         }
620         chan = chanctx_conf->def.chan;
621         rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
622         rcu_read_unlock();
623         sband = local->hw.wiphy->bands[chan->band];
624         shift = ieee80211_vif_get_shift(&sdata->vif);
625
626         if (assoc_data->supp_rates_len) {
627                 /*
628                  * Get all rates supported by the device and the AP as
629                  * some APs don't like getting a superset of their rates
630                  * in the association request (e.g. D-Link DAP 1353 in
631                  * b-only mode)...
632                  */
633                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
634                                                      assoc_data->supp_rates,
635                                                      assoc_data->supp_rates_len,
636                                                      &rates);
637         } else {
638                 /*
639                  * In case AP not provide any supported rates information
640                  * before association, we send information element(s) with
641                  * all rates that we support.
642                  */
643                 rates_len = 0;
644                 for (i = 0; i < sband->n_bitrates; i++) {
645                         if ((rate_flags & sband->bitrates[i].flags)
646                             != rate_flags)
647                                 continue;
648                         rates |= BIT(i);
649                         rates_len++;
650                 }
651         }
652
653         skb = alloc_skb(local->hw.extra_tx_headroom +
654                         sizeof(*mgmt) + /* bit too much but doesn't matter */
655                         2 + assoc_data->ssid_len + /* SSID */
656                         4 + rates_len + /* (extended) rates */
657                         4 + /* power capability */
658                         2 + 2 * sband->n_channels + /* supported channels */
659                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
660                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
661                         assoc_data->ie_len + /* extra IEs */
662                         9, /* WMM */
663                         GFP_KERNEL);
664         if (!skb)
665                 return;
666
667         skb_reserve(skb, local->hw.extra_tx_headroom);
668
669         capab = WLAN_CAPABILITY_ESS;
670
671         if (sband->band == IEEE80211_BAND_2GHZ) {
672                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
673                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
674                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
675                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
676         }
677
678         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
679                 capab |= WLAN_CAPABILITY_PRIVACY;
680
681         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
682             (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
683                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
684
685         if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
686                 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
687
688         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
689         memset(mgmt, 0, 24);
690         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
691         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
692         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
693
694         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
695                 skb_put(skb, 10);
696                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
697                                                   IEEE80211_STYPE_REASSOC_REQ);
698                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
699                 mgmt->u.reassoc_req.listen_interval =
700                                 cpu_to_le16(local->hw.conf.listen_interval);
701                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
702                        ETH_ALEN);
703         } else {
704                 skb_put(skb, 4);
705                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
706                                                   IEEE80211_STYPE_ASSOC_REQ);
707                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
708                 mgmt->u.assoc_req.listen_interval =
709                                 cpu_to_le16(local->hw.conf.listen_interval);
710         }
711
712         /* SSID */
713         pos = skb_put(skb, 2 + assoc_data->ssid_len);
714         *pos++ = WLAN_EID_SSID;
715         *pos++ = assoc_data->ssid_len;
716         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
717
718         /* add all rates which were marked to be used above */
719         supp_rates_len = rates_len;
720         if (supp_rates_len > 8)
721                 supp_rates_len = 8;
722
723         pos = skb_put(skb, supp_rates_len + 2);
724         *pos++ = WLAN_EID_SUPP_RATES;
725         *pos++ = supp_rates_len;
726
727         count = 0;
728         for (i = 0; i < sband->n_bitrates; i++) {
729                 if (BIT(i) & rates) {
730                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
731                                                 5 * (1 << shift));
732                         *pos++ = (u8) rate;
733                         if (++count == 8)
734                                 break;
735                 }
736         }
737
738         if (rates_len > count) {
739                 pos = skb_put(skb, rates_len - count + 2);
740                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
741                 *pos++ = rates_len - count;
742
743                 for (i++; i < sband->n_bitrates; i++) {
744                         if (BIT(i) & rates) {
745                                 int rate;
746                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
747                                                     5 * (1 << shift));
748                                 *pos++ = (u8) rate;
749                         }
750                 }
751         }
752
753         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
754             capab & WLAN_CAPABILITY_RADIO_MEASURE) {
755                 pos = skb_put(skb, 4);
756                 *pos++ = WLAN_EID_PWR_CAPABILITY;
757                 *pos++ = 2;
758                 *pos++ = 0; /* min tx power */
759                  /* max tx power */
760                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
761         }
762
763         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
764                 /* TODO: get this in reg domain format */
765                 pos = skb_put(skb, 2 * sband->n_channels + 2);
766                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
767                 *pos++ = 2 * sband->n_channels;
768                 for (i = 0; i < sband->n_channels; i++) {
769                         *pos++ = ieee80211_frequency_to_channel(
770                                         sband->channels[i].center_freq);
771                         *pos++ = 1; /* one channel in the subband*/
772                 }
773         }
774
775         /* if present, add any custom IEs that go before HT */
776         if (assoc_data->ie_len) {
777                 static const u8 before_ht[] = {
778                         WLAN_EID_SSID,
779                         WLAN_EID_SUPP_RATES,
780                         WLAN_EID_EXT_SUPP_RATES,
781                         WLAN_EID_PWR_CAPABILITY,
782                         WLAN_EID_SUPPORTED_CHANNELS,
783                         WLAN_EID_RSN,
784                         WLAN_EID_QOS_CAPA,
785                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
786                         WLAN_EID_MOBILITY_DOMAIN,
787                         WLAN_EID_FAST_BSS_TRANSITION,   /* reassoc only */
788                         WLAN_EID_RIC_DATA,              /* reassoc only */
789                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
790                 };
791                 static const u8 after_ric[] = {
792                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
793                         WLAN_EID_HT_CAPABILITY,
794                         WLAN_EID_BSS_COEX_2040,
795                         WLAN_EID_EXT_CAPABILITY,
796                         WLAN_EID_QOS_TRAFFIC_CAPA,
797                         WLAN_EID_TIM_BCAST_REQ,
798                         WLAN_EID_INTERWORKING,
799                         /* 60GHz doesn't happen right now */
800                         WLAN_EID_VHT_CAPABILITY,
801                         WLAN_EID_OPMODE_NOTIF,
802                 };
803
804                 noffset = ieee80211_ie_split_ric(assoc_data->ie,
805                                                  assoc_data->ie_len,
806                                                  before_ht,
807                                                  ARRAY_SIZE(before_ht),
808                                                  after_ric,
809                                                  ARRAY_SIZE(after_ric),
810                                                  offset);
811                 pos = skb_put(skb, noffset - offset);
812                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
813                 offset = noffset;
814         }
815
816         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
817                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
818                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
819
820         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
821                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
822                                     sband, chan, sdata->smps_mode);
823
824         /* if present, add any custom IEs that go before VHT */
825         if (assoc_data->ie_len) {
826                 static const u8 before_vht[] = {
827                         WLAN_EID_SSID,
828                         WLAN_EID_SUPP_RATES,
829                         WLAN_EID_EXT_SUPP_RATES,
830                         WLAN_EID_PWR_CAPABILITY,
831                         WLAN_EID_SUPPORTED_CHANNELS,
832                         WLAN_EID_RSN,
833                         WLAN_EID_QOS_CAPA,
834                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
835                         WLAN_EID_MOBILITY_DOMAIN,
836                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
837                         WLAN_EID_HT_CAPABILITY,
838                         WLAN_EID_BSS_COEX_2040,
839                         WLAN_EID_EXT_CAPABILITY,
840                         WLAN_EID_QOS_TRAFFIC_CAPA,
841                         WLAN_EID_TIM_BCAST_REQ,
842                         WLAN_EID_INTERWORKING,
843                 };
844
845                 /* RIC already taken above, so no need to handle here anymore */
846                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
847                                              before_vht, ARRAY_SIZE(before_vht),
848                                              offset);
849                 pos = skb_put(skb, noffset - offset);
850                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
851                 offset = noffset;
852         }
853
854         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
855                 ieee80211_add_vht_ie(sdata, skb, sband,
856                                      &assoc_data->ap_vht_cap);
857
858         /* if present, add any custom non-vendor IEs that go after HT */
859         if (assoc_data->ie_len) {
860                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
861                                                     assoc_data->ie_len,
862                                                     offset);
863                 pos = skb_put(skb, noffset - offset);
864                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
865                 offset = noffset;
866         }
867
868         if (assoc_data->wmm) {
869                 if (assoc_data->uapsd) {
870                         qos_info = ifmgd->uapsd_queues;
871                         qos_info |= (ifmgd->uapsd_max_sp_len <<
872                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
873                 } else {
874                         qos_info = 0;
875                 }
876
877                 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
878         }
879
880         /* add any remaining custom (i.e. vendor specific here) IEs */
881         if (assoc_data->ie_len) {
882                 noffset = assoc_data->ie_len;
883                 pos = skb_put(skb, noffset - offset);
884                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
885         }
886
887         drv_mgd_prepare_tx(local, sdata);
888
889         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
890         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
891                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
892                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
893         ieee80211_tx_skb(sdata, skb);
894 }
895
896 void ieee80211_send_pspoll(struct ieee80211_local *local,
897                            struct ieee80211_sub_if_data *sdata)
898 {
899         struct ieee80211_pspoll *pspoll;
900         struct sk_buff *skb;
901
902         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
903         if (!skb)
904                 return;
905
906         pspoll = (struct ieee80211_pspoll *) skb->data;
907         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
908
909         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
910         ieee80211_tx_skb(sdata, skb);
911 }
912
913 void ieee80211_send_nullfunc(struct ieee80211_local *local,
914                              struct ieee80211_sub_if_data *sdata,
915                              int powersave)
916 {
917         struct sk_buff *skb;
918         struct ieee80211_hdr_3addr *nullfunc;
919         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
920
921         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
922         if (!skb)
923                 return;
924
925         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
926         if (powersave)
927                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
928
929         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
930                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
931
932         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
933                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
934
935         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
936                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
937
938         ieee80211_tx_skb(sdata, skb);
939 }
940
941 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
942                                           struct ieee80211_sub_if_data *sdata)
943 {
944         struct sk_buff *skb;
945         struct ieee80211_hdr *nullfunc;
946         __le16 fc;
947
948         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
949                 return;
950
951         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
952         if (!skb)
953                 return;
954
955         skb_reserve(skb, local->hw.extra_tx_headroom);
956
957         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
958         memset(nullfunc, 0, 30);
959         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
960                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
961         nullfunc->frame_control = fc;
962         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
963         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
964         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
965         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
966
967         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
968         ieee80211_tx_skb(sdata, skb);
969 }
970
971 /* spectrum management related things */
972 static void ieee80211_chswitch_work(struct work_struct *work)
973 {
974         struct ieee80211_sub_if_data *sdata =
975                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
976         struct ieee80211_local *local = sdata->local;
977         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
978         int ret;
979
980         if (!ieee80211_sdata_running(sdata))
981                 return;
982
983         sdata_lock(sdata);
984         mutex_lock(&local->mtx);
985         mutex_lock(&local->chanctx_mtx);
986
987         if (!ifmgd->associated)
988                 goto out;
989
990         if (!sdata->vif.csa_active)
991                 goto out;
992
993         /*
994          * using reservation isn't immediate as it may be deferred until later
995          * with multi-vif. once reservation is complete it will re-schedule the
996          * work with no reserved_chanctx so verify chandef to check if it
997          * completed successfully
998          */
999
1000         if (sdata->reserved_chanctx) {
1001                 /*
1002                  * with multi-vif csa driver may call ieee80211_csa_finish()
1003                  * many times while waiting for other interfaces to use their
1004                  * reservations
1005                  */
1006                 if (sdata->reserved_ready)
1007                         goto out;
1008
1009                 ret = ieee80211_vif_use_reserved_context(sdata);
1010                 if (ret) {
1011                         sdata_info(sdata,
1012                                    "failed to use reserved channel context, disconnecting (err=%d)\n",
1013                                    ret);
1014                         ieee80211_queue_work(&sdata->local->hw,
1015                                              &ifmgd->csa_connection_drop_work);
1016                         goto out;
1017                 }
1018
1019                 goto out;
1020         }
1021
1022         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1023                                         &sdata->csa_chandef)) {
1024                 sdata_info(sdata,
1025                            "failed to finalize channel switch, disconnecting\n");
1026                 ieee80211_queue_work(&sdata->local->hw,
1027                                      &ifmgd->csa_connection_drop_work);
1028                 goto out;
1029         }
1030
1031         /* XXX: shouldn't really modify cfg80211-owned data! */
1032         ifmgd->associated->channel = sdata->csa_chandef.chan;
1033
1034         ifmgd->csa_waiting_bcn = true;
1035
1036         ieee80211_sta_reset_beacon_monitor(sdata);
1037         ieee80211_sta_reset_conn_monitor(sdata);
1038
1039 out:
1040         mutex_unlock(&local->chanctx_mtx);
1041         mutex_unlock(&local->mtx);
1042         sdata_unlock(sdata);
1043 }
1044
1045 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1046 {
1047         struct ieee80211_local *local = sdata->local;
1048         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1049         int ret;
1050
1051         sdata_assert_lock(sdata);
1052
1053         WARN_ON(!sdata->vif.csa_active);
1054
1055         if (sdata->csa_block_tx) {
1056                 ieee80211_wake_vif_queues(local, sdata,
1057                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1058                 sdata->csa_block_tx = false;
1059         }
1060
1061         sdata->vif.csa_active = false;
1062         ifmgd->csa_waiting_bcn = false;
1063
1064         ret = drv_post_channel_switch(sdata);
1065         if (ret) {
1066                 sdata_info(sdata,
1067                            "driver post channel switch failed, disconnecting\n");
1068                 ieee80211_queue_work(&local->hw,
1069                                      &ifmgd->csa_connection_drop_work);
1070                 return;
1071         }
1072
1073         cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1074 }
1075
1076 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1077 {
1078         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1079         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1080
1081         trace_api_chswitch_done(sdata, success);
1082         if (!success) {
1083                 sdata_info(sdata,
1084                            "driver channel switch failed, disconnecting\n");
1085                 ieee80211_queue_work(&sdata->local->hw,
1086                                      &ifmgd->csa_connection_drop_work);
1087         } else {
1088                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1089         }
1090 }
1091 EXPORT_SYMBOL(ieee80211_chswitch_done);
1092
1093 static void ieee80211_chswitch_timer(unsigned long data)
1094 {
1095         struct ieee80211_sub_if_data *sdata =
1096                 (struct ieee80211_sub_if_data *) data;
1097
1098         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1099 }
1100
1101 static void
1102 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1103                                  u64 timestamp, u32 device_timestamp,
1104                                  struct ieee802_11_elems *elems,
1105                                  bool beacon)
1106 {
1107         struct ieee80211_local *local = sdata->local;
1108         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1109         struct cfg80211_bss *cbss = ifmgd->associated;
1110         struct ieee80211_chanctx_conf *conf;
1111         struct ieee80211_chanctx *chanctx;
1112         enum ieee80211_band current_band;
1113         struct ieee80211_csa_ie csa_ie;
1114         struct ieee80211_channel_switch ch_switch;
1115         int res;
1116
1117         sdata_assert_lock(sdata);
1118
1119         if (!cbss)
1120                 return;
1121
1122         if (local->scanning)
1123                 return;
1124
1125         /* disregard subsequent announcements if we are already processing */
1126         if (sdata->vif.csa_active)
1127                 return;
1128
1129         current_band = cbss->channel->band;
1130         memset(&csa_ie, 0, sizeof(csa_ie));
1131         res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1132                                            ifmgd->flags,
1133                                            ifmgd->associated->bssid, &csa_ie);
1134         if (res < 0)
1135                 ieee80211_queue_work(&local->hw,
1136                                      &ifmgd->csa_connection_drop_work);
1137         if (res)
1138                 return;
1139
1140         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1141                                      IEEE80211_CHAN_DISABLED)) {
1142                 sdata_info(sdata,
1143                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1144                            ifmgd->associated->bssid,
1145                            csa_ie.chandef.chan->center_freq,
1146                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1147                            csa_ie.chandef.center_freq2);
1148                 ieee80211_queue_work(&local->hw,
1149                                      &ifmgd->csa_connection_drop_work);
1150                 return;
1151         }
1152
1153         mutex_lock(&local->mtx);
1154         mutex_lock(&local->chanctx_mtx);
1155         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1156                                          lockdep_is_held(&local->chanctx_mtx));
1157         if (!conf) {
1158                 sdata_info(sdata,
1159                            "no channel context assigned to vif?, disconnecting\n");
1160                 ieee80211_queue_work(&local->hw,
1161                                      &ifmgd->csa_connection_drop_work);
1162                 mutex_unlock(&local->chanctx_mtx);
1163                 mutex_unlock(&local->mtx);
1164                 return;
1165         }
1166
1167         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1168
1169         if (local->use_chanctx &&
1170             !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1171                 sdata_info(sdata,
1172                            "driver doesn't support chan-switch with channel contexts\n");
1173                 ieee80211_queue_work(&local->hw,
1174                                      &ifmgd->csa_connection_drop_work);
1175                 mutex_unlock(&local->chanctx_mtx);
1176                 mutex_unlock(&local->mtx);
1177                 return;
1178         }
1179
1180         ch_switch.timestamp = timestamp;
1181         ch_switch.device_timestamp = device_timestamp;
1182         ch_switch.block_tx = csa_ie.mode;
1183         ch_switch.chandef = csa_ie.chandef;
1184         ch_switch.count = csa_ie.count;
1185
1186         if (drv_pre_channel_switch(sdata, &ch_switch)) {
1187                 sdata_info(sdata,
1188                            "preparing for channel switch failed, disconnecting\n");
1189                 ieee80211_queue_work(&local->hw,
1190                                      &ifmgd->csa_connection_drop_work);
1191                 mutex_unlock(&local->chanctx_mtx);
1192                 mutex_unlock(&local->mtx);
1193                 return;
1194         }
1195
1196         res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1197                                             chanctx->mode, false);
1198         if (res) {
1199                 sdata_info(sdata,
1200                            "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1201                            res);
1202                 ieee80211_queue_work(&local->hw,
1203                                      &ifmgd->csa_connection_drop_work);
1204                 mutex_unlock(&local->chanctx_mtx);
1205                 mutex_unlock(&local->mtx);
1206                 return;
1207         }
1208         mutex_unlock(&local->chanctx_mtx);
1209
1210         sdata->vif.csa_active = true;
1211         sdata->csa_chandef = csa_ie.chandef;
1212         sdata->csa_block_tx = csa_ie.mode;
1213
1214         if (sdata->csa_block_tx)
1215                 ieee80211_stop_vif_queues(local, sdata,
1216                                           IEEE80211_QUEUE_STOP_REASON_CSA);
1217         mutex_unlock(&local->mtx);
1218
1219         cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1220                                           csa_ie.count);
1221
1222         if (local->ops->channel_switch) {
1223                 /* use driver's channel switch callback */
1224                 drv_channel_switch(local, sdata, &ch_switch);
1225                 return;
1226         }
1227
1228         /* channel switch handled in software */
1229         if (csa_ie.count <= 1)
1230                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1231         else
1232                 mod_timer(&ifmgd->chswitch_timer,
1233                           TU_TO_EXP_TIME((csa_ie.count - 1) *
1234                                          cbss->beacon_interval));
1235 }
1236
1237 static bool
1238 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1239                                  struct ieee80211_channel *channel,
1240                                  const u8 *country_ie, u8 country_ie_len,
1241                                  const u8 *pwr_constr_elem,
1242                                  int *chan_pwr, int *pwr_reduction)
1243 {
1244         struct ieee80211_country_ie_triplet *triplet;
1245         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1246         int i, chan_increment;
1247         bool have_chan_pwr = false;
1248
1249         /* Invalid IE */
1250         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1251                 return false;
1252
1253         triplet = (void *)(country_ie + 3);
1254         country_ie_len -= 3;
1255
1256         switch (channel->band) {
1257         default:
1258                 WARN_ON_ONCE(1);
1259                 /* fall through */
1260         case IEEE80211_BAND_2GHZ:
1261         case IEEE80211_BAND_60GHZ:
1262                 chan_increment = 1;
1263                 break;
1264         case IEEE80211_BAND_5GHZ:
1265                 chan_increment = 4;
1266                 break;
1267         }
1268
1269         /* find channel */
1270         while (country_ie_len >= 3) {
1271                 u8 first_channel = triplet->chans.first_channel;
1272
1273                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1274                         goto next;
1275
1276                 for (i = 0; i < triplet->chans.num_channels; i++) {
1277                         if (first_channel + i * chan_increment == chan) {
1278                                 have_chan_pwr = true;
1279                                 *chan_pwr = triplet->chans.max_power;
1280                                 break;
1281                         }
1282                 }
1283                 if (have_chan_pwr)
1284                         break;
1285
1286  next:
1287                 triplet++;
1288                 country_ie_len -= 3;
1289         }
1290
1291         if (have_chan_pwr && pwr_constr_elem)
1292                 *pwr_reduction = *pwr_constr_elem;
1293         else
1294                 *pwr_reduction = 0;
1295
1296         return have_chan_pwr;
1297 }
1298
1299 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1300                                       struct ieee80211_channel *channel,
1301                                       const u8 *cisco_dtpc_ie,
1302                                       int *pwr_level)
1303 {
1304         /* From practical testing, the first data byte of the DTPC element
1305          * seems to contain the requested dBm level, and the CLI on Cisco
1306          * APs clearly state the range is -127 to 127 dBm, which indicates
1307          * a signed byte, although it seemingly never actually goes negative.
1308          * The other byte seems to always be zero.
1309          */
1310         *pwr_level = (__s8)cisco_dtpc_ie[4];
1311 }
1312
1313 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1314                                        struct ieee80211_channel *channel,
1315                                        struct ieee80211_mgmt *mgmt,
1316                                        const u8 *country_ie, u8 country_ie_len,
1317                                        const u8 *pwr_constr_ie,
1318                                        const u8 *cisco_dtpc_ie)
1319 {
1320         bool has_80211h_pwr = false, has_cisco_pwr = false;
1321         int chan_pwr = 0, pwr_reduction_80211h = 0;
1322         int pwr_level_cisco, pwr_level_80211h;
1323         int new_ap_level;
1324         __le16 capab = mgmt->u.probe_resp.capab_info;
1325
1326         if (country_ie &&
1327             (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1328              capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1329                 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1330                         sdata, channel, country_ie, country_ie_len,
1331                         pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1332                 pwr_level_80211h =
1333                         max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1334         }
1335
1336         if (cisco_dtpc_ie) {
1337                 ieee80211_find_cisco_dtpc(
1338                         sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1339                 has_cisco_pwr = true;
1340         }
1341
1342         if (!has_80211h_pwr && !has_cisco_pwr)
1343                 return 0;
1344
1345         /* If we have both 802.11h and Cisco DTPC, apply both limits
1346          * by picking the smallest of the two power levels advertised.
1347          */
1348         if (has_80211h_pwr &&
1349             (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1350                 sdata_info(sdata,
1351                            "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1352                            pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1353                            sdata->u.mgd.bssid);
1354                 new_ap_level = pwr_level_80211h;
1355         } else {  /* has_cisco_pwr is always true here. */
1356                 sdata_info(sdata,
1357                            "Limiting TX power to %d dBm as advertised by %pM\n",
1358                            pwr_level_cisco, sdata->u.mgd.bssid);
1359                 new_ap_level = pwr_level_cisco;
1360         }
1361
1362         if (sdata->ap_power_level == new_ap_level)
1363                 return 0;
1364
1365         sdata->ap_power_level = new_ap_level;
1366         if (__ieee80211_recalc_txpower(sdata))
1367                 return BSS_CHANGED_TXPOWER;
1368         return 0;
1369 }
1370
1371 /* powersave */
1372 static void ieee80211_enable_ps(struct ieee80211_local *local,
1373                                 struct ieee80211_sub_if_data *sdata)
1374 {
1375         struct ieee80211_conf *conf = &local->hw.conf;
1376
1377         /*
1378          * If we are scanning right now then the parameters will
1379          * take effect when scan finishes.
1380          */
1381         if (local->scanning)
1382                 return;
1383
1384         if (conf->dynamic_ps_timeout > 0 &&
1385             !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1386                 mod_timer(&local->dynamic_ps_timer, jiffies +
1387                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1388         } else {
1389                 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1390                         ieee80211_send_nullfunc(local, sdata, 1);
1391
1392                 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1393                     (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1394                         return;
1395
1396                 conf->flags |= IEEE80211_CONF_PS;
1397                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1398         }
1399 }
1400
1401 static void ieee80211_change_ps(struct ieee80211_local *local)
1402 {
1403         struct ieee80211_conf *conf = &local->hw.conf;
1404
1405         if (local->ps_sdata) {
1406                 ieee80211_enable_ps(local, local->ps_sdata);
1407         } else if (conf->flags & IEEE80211_CONF_PS) {
1408                 conf->flags &= ~IEEE80211_CONF_PS;
1409                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1410                 del_timer_sync(&local->dynamic_ps_timer);
1411                 cancel_work_sync(&local->dynamic_ps_enable_work);
1412         }
1413 }
1414
1415 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1416 {
1417         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1418         struct sta_info *sta = NULL;
1419         bool authorized = false;
1420
1421         if (!mgd->powersave)
1422                 return false;
1423
1424         if (mgd->broken_ap)
1425                 return false;
1426
1427         if (!mgd->associated)
1428                 return false;
1429
1430         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1431                 return false;
1432
1433         if (!mgd->have_beacon)
1434                 return false;
1435
1436         rcu_read_lock();
1437         sta = sta_info_get(sdata, mgd->bssid);
1438         if (sta)
1439                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1440         rcu_read_unlock();
1441
1442         return authorized;
1443 }
1444
1445 /* need to hold RTNL or interface lock */
1446 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1447 {
1448         struct ieee80211_sub_if_data *sdata, *found = NULL;
1449         int count = 0;
1450         int timeout;
1451
1452         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1453                 local->ps_sdata = NULL;
1454                 return;
1455         }
1456
1457         list_for_each_entry(sdata, &local->interfaces, list) {
1458                 if (!ieee80211_sdata_running(sdata))
1459                         continue;
1460                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1461                         /* If an AP vif is found, then disable PS
1462                          * by setting the count to zero thereby setting
1463                          * ps_sdata to NULL.
1464                          */
1465                         count = 0;
1466                         break;
1467                 }
1468                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1469                         continue;
1470                 found = sdata;
1471                 count++;
1472         }
1473
1474         if (count == 1 && ieee80211_powersave_allowed(found)) {
1475                 s32 beaconint_us;
1476
1477                 if (latency < 0)
1478                         latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1479
1480                 beaconint_us = ieee80211_tu_to_usec(
1481                                         found->vif.bss_conf.beacon_int);
1482
1483                 timeout = local->dynamic_ps_forced_timeout;
1484                 if (timeout < 0) {
1485                         /*
1486                          * Go to full PSM if the user configures a very low
1487                          * latency requirement.
1488                          * The 2000 second value is there for compatibility
1489                          * until the PM_QOS_NETWORK_LATENCY is configured
1490                          * with real values.
1491                          */
1492                         if (latency > (1900 * USEC_PER_MSEC) &&
1493                             latency != (2000 * USEC_PER_SEC))
1494                                 timeout = 0;
1495                         else
1496                                 timeout = 100;
1497                 }
1498                 local->hw.conf.dynamic_ps_timeout = timeout;
1499
1500                 if (beaconint_us > latency) {
1501                         local->ps_sdata = NULL;
1502                 } else {
1503                         int maxslp = 1;
1504                         u8 dtimper = found->u.mgd.dtim_period;
1505
1506                         /* If the TIM IE is invalid, pretend the value is 1 */
1507                         if (!dtimper)
1508                                 dtimper = 1;
1509                         else if (dtimper > 1)
1510                                 maxslp = min_t(int, dtimper,
1511                                                     latency / beaconint_us);
1512
1513                         local->hw.conf.max_sleep_period = maxslp;
1514                         local->hw.conf.ps_dtim_period = dtimper;
1515                         local->ps_sdata = found;
1516                 }
1517         } else {
1518                 local->ps_sdata = NULL;
1519         }
1520
1521         ieee80211_change_ps(local);
1522 }
1523
1524 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1525 {
1526         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1527
1528         if (sdata->vif.bss_conf.ps != ps_allowed) {
1529                 sdata->vif.bss_conf.ps = ps_allowed;
1530                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1531         }
1532 }
1533
1534 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1535 {
1536         struct ieee80211_local *local =
1537                 container_of(work, struct ieee80211_local,
1538                              dynamic_ps_disable_work);
1539
1540         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1541                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1542                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1543         }
1544
1545         ieee80211_wake_queues_by_reason(&local->hw,
1546                                         IEEE80211_MAX_QUEUE_MAP,
1547                                         IEEE80211_QUEUE_STOP_REASON_PS,
1548                                         false);
1549 }
1550
1551 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1552 {
1553         struct ieee80211_local *local =
1554                 container_of(work, struct ieee80211_local,
1555                              dynamic_ps_enable_work);
1556         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1557         struct ieee80211_if_managed *ifmgd;
1558         unsigned long flags;
1559         int q;
1560
1561         /* can only happen when PS was just disabled anyway */
1562         if (!sdata)
1563                 return;
1564
1565         ifmgd = &sdata->u.mgd;
1566
1567         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1568                 return;
1569
1570         if (local->hw.conf.dynamic_ps_timeout > 0) {
1571                 /* don't enter PS if TX frames are pending */
1572                 if (drv_tx_frames_pending(local)) {
1573                         mod_timer(&local->dynamic_ps_timer, jiffies +
1574                                   msecs_to_jiffies(
1575                                   local->hw.conf.dynamic_ps_timeout));
1576                         return;
1577                 }
1578
1579                 /*
1580                  * transmission can be stopped by others which leads to
1581                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1582                  * is not the actual idle state.
1583                  */
1584                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1585                 for (q = 0; q < local->hw.queues; q++) {
1586                         if (local->queue_stop_reasons[q]) {
1587                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1588                                                        flags);
1589                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1590                                           msecs_to_jiffies(
1591                                           local->hw.conf.dynamic_ps_timeout));
1592                                 return;
1593                         }
1594                 }
1595                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1596         }
1597
1598         if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1599             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1600                 if (drv_tx_frames_pending(local)) {
1601                         mod_timer(&local->dynamic_ps_timer, jiffies +
1602                                   msecs_to_jiffies(
1603                                   local->hw.conf.dynamic_ps_timeout));
1604                 } else {
1605                         ieee80211_send_nullfunc(local, sdata, 1);
1606                         /* Flush to get the tx status of nullfunc frame */
1607                         ieee80211_flush_queues(local, sdata, false);
1608                 }
1609         }
1610
1611         if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1612               (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1613             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1614                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1615                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1616                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1617         }
1618 }
1619
1620 void ieee80211_dynamic_ps_timer(unsigned long data)
1621 {
1622         struct ieee80211_local *local = (void *) data;
1623
1624         if (local->quiescing || local->suspended)
1625                 return;
1626
1627         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1628 }
1629
1630 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1631 {
1632         struct delayed_work *delayed_work =
1633                 container_of(work, struct delayed_work, work);
1634         struct ieee80211_sub_if_data *sdata =
1635                 container_of(delayed_work, struct ieee80211_sub_if_data,
1636                              dfs_cac_timer_work);
1637         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1638
1639         mutex_lock(&sdata->local->mtx);
1640         if (sdata->wdev.cac_started) {
1641                 ieee80211_vif_release_channel(sdata);
1642                 cfg80211_cac_event(sdata->dev, &chandef,
1643                                    NL80211_RADAR_CAC_FINISHED,
1644                                    GFP_KERNEL);
1645         }
1646         mutex_unlock(&sdata->local->mtx);
1647 }
1648
1649 static bool
1650 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1651 {
1652         struct ieee80211_local *local = sdata->local;
1653         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1654         bool ret;
1655         int ac;
1656
1657         if (local->hw.queues < IEEE80211_NUM_ACS)
1658                 return false;
1659
1660         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1661                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1662                 int non_acm_ac;
1663                 unsigned long now = jiffies;
1664
1665                 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1666                     tx_tspec->admitted_time &&
1667                     time_after(now, tx_tspec->time_slice_start + HZ)) {
1668                         tx_tspec->consumed_tx_time = 0;
1669                         tx_tspec->time_slice_start = now;
1670
1671                         if (tx_tspec->downgraded)
1672                                 tx_tspec->action =
1673                                         TX_TSPEC_ACTION_STOP_DOWNGRADE;
1674                 }
1675
1676                 switch (tx_tspec->action) {
1677                 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1678                         /* take the original parameters */
1679                         if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1680                                 sdata_err(sdata,
1681                                           "failed to set TX queue parameters for queue %d\n",
1682                                           ac);
1683                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1684                         tx_tspec->downgraded = false;
1685                         ret = true;
1686                         break;
1687                 case TX_TSPEC_ACTION_DOWNGRADE:
1688                         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1689                                 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1690                                 ret = true;
1691                                 break;
1692                         }
1693                         /* downgrade next lower non-ACM AC */
1694                         for (non_acm_ac = ac + 1;
1695                              non_acm_ac < IEEE80211_NUM_ACS;
1696                              non_acm_ac++)
1697                                 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1698                                         break;
1699                         /* The loop will result in using BK even if it requires
1700                          * admission control, such configuration makes no sense
1701                          * and we have to transmit somehow - the AC selection
1702                          * does the same thing.
1703                          */
1704                         if (drv_conf_tx(local, sdata, ac,
1705                                         &sdata->tx_conf[non_acm_ac]))
1706                                 sdata_err(sdata,
1707                                           "failed to set TX queue parameters for queue %d\n",
1708                                           ac);
1709                         tx_tspec->action = TX_TSPEC_ACTION_NONE;
1710                         ret = true;
1711                         schedule_delayed_work(&ifmgd->tx_tspec_wk,
1712                                 tx_tspec->time_slice_start + HZ - now + 1);
1713                         break;
1714                 case TX_TSPEC_ACTION_NONE:
1715                         /* nothing now */
1716                         break;
1717                 }
1718         }
1719
1720         return ret;
1721 }
1722
1723 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1724 {
1725         if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1726                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1727 }
1728
1729 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1730 {
1731         struct ieee80211_sub_if_data *sdata;
1732
1733         sdata = container_of(work, struct ieee80211_sub_if_data,
1734                              u.mgd.tx_tspec_wk.work);
1735         ieee80211_sta_handle_tspec_ac_params(sdata);
1736 }
1737
1738 /* MLME */
1739 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1740                                      struct ieee80211_sub_if_data *sdata,
1741                                      const u8 *wmm_param, size_t wmm_param_len)
1742 {
1743         struct ieee80211_tx_queue_params params;
1744         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1745         size_t left;
1746         int count;
1747         const u8 *pos;
1748         u8 uapsd_queues = 0;
1749
1750         if (!local->ops->conf_tx)
1751                 return false;
1752
1753         if (local->hw.queues < IEEE80211_NUM_ACS)
1754                 return false;
1755
1756         if (!wmm_param)
1757                 return false;
1758
1759         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1760                 return false;
1761
1762         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1763                 uapsd_queues = ifmgd->uapsd_queues;
1764
1765         count = wmm_param[6] & 0x0f;
1766         if (count == ifmgd->wmm_last_param_set)
1767                 return false;
1768         ifmgd->wmm_last_param_set = count;
1769
1770         pos = wmm_param + 8;
1771         left = wmm_param_len - 8;
1772
1773         memset(&params, 0, sizeof(params));
1774
1775         sdata->wmm_acm = 0;
1776         for (; left >= 4; left -= 4, pos += 4) {
1777                 int aci = (pos[0] >> 5) & 0x03;
1778                 int acm = (pos[0] >> 4) & 0x01;
1779                 bool uapsd = false;
1780                 int queue;
1781
1782                 switch (aci) {
1783                 case 1: /* AC_BK */
1784                         queue = 3;
1785                         if (acm)
1786                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1787                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1788                                 uapsd = true;
1789                         break;
1790                 case 2: /* AC_VI */
1791                         queue = 1;
1792                         if (acm)
1793                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1794                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1795                                 uapsd = true;
1796                         break;
1797                 case 3: /* AC_VO */
1798                         queue = 0;
1799                         if (acm)
1800                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1801                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1802                                 uapsd = true;
1803                         break;
1804                 case 0: /* AC_BE */
1805                 default:
1806                         queue = 2;
1807                         if (acm)
1808                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1809                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1810                                 uapsd = true;
1811                         break;
1812                 }
1813
1814                 params.aifs = pos[0] & 0x0f;
1815                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1816                 params.cw_min = ecw2cw(pos[1] & 0x0f);
1817                 params.txop = get_unaligned_le16(pos + 2);
1818                 params.acm = acm;
1819                 params.uapsd = uapsd;
1820
1821                 mlme_dbg(sdata,
1822                          "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1823                          queue, aci, acm,
1824                          params.aifs, params.cw_min, params.cw_max,
1825                          params.txop, params.uapsd,
1826                          ifmgd->tx_tspec[queue].downgraded);
1827                 sdata->tx_conf[queue] = params;
1828                 if (!ifmgd->tx_tspec[queue].downgraded &&
1829                     drv_conf_tx(local, sdata, queue, &params))
1830                         sdata_err(sdata,
1831                                   "failed to set TX queue parameters for queue %d\n",
1832                                   queue);
1833         }
1834
1835         /* enable WMM or activate new settings */
1836         sdata->vif.bss_conf.qos = true;
1837         return true;
1838 }
1839
1840 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1841 {
1842         lockdep_assert_held(&sdata->local->mtx);
1843
1844         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1845         ieee80211_run_deferred_scan(sdata->local);
1846 }
1847
1848 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1849 {
1850         mutex_lock(&sdata->local->mtx);
1851         __ieee80211_stop_poll(sdata);
1852         mutex_unlock(&sdata->local->mtx);
1853 }
1854
1855 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1856                                            u16 capab, bool erp_valid, u8 erp)
1857 {
1858         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1859         u32 changed = 0;
1860         bool use_protection;
1861         bool use_short_preamble;
1862         bool use_short_slot;
1863
1864         if (erp_valid) {
1865                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1866                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1867         } else {
1868                 use_protection = false;
1869                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1870         }
1871
1872         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1873         if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1874                 use_short_slot = true;
1875
1876         if (use_protection != bss_conf->use_cts_prot) {
1877                 bss_conf->use_cts_prot = use_protection;
1878                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1879         }
1880
1881         if (use_short_preamble != bss_conf->use_short_preamble) {
1882                 bss_conf->use_short_preamble = use_short_preamble;
1883                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1884         }
1885
1886         if (use_short_slot != bss_conf->use_short_slot) {
1887                 bss_conf->use_short_slot = use_short_slot;
1888                 changed |= BSS_CHANGED_ERP_SLOT;
1889         }
1890
1891         return changed;
1892 }
1893
1894 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1895                                      struct cfg80211_bss *cbss,
1896                                      u32 bss_info_changed)
1897 {
1898         struct ieee80211_bss *bss = (void *)cbss->priv;
1899         struct ieee80211_local *local = sdata->local;
1900         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1901
1902         bss_info_changed |= BSS_CHANGED_ASSOC;
1903         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1904                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1905
1906         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1907                 beacon_loss_count * bss_conf->beacon_int));
1908
1909         sdata->u.mgd.associated = cbss;
1910         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1911
1912         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1913
1914         if (sdata->vif.p2p) {
1915                 const struct cfg80211_bss_ies *ies;
1916
1917                 rcu_read_lock();
1918                 ies = rcu_dereference(cbss->ies);
1919                 if (ies) {
1920                         int ret;
1921
1922                         ret = cfg80211_get_p2p_attr(
1923                                         ies->data, ies->len,
1924                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1925                                         (u8 *) &bss_conf->p2p_noa_attr,
1926                                         sizeof(bss_conf->p2p_noa_attr));
1927                         if (ret >= 2) {
1928                                 sdata->u.mgd.p2p_noa_index =
1929                                         bss_conf->p2p_noa_attr.index;
1930                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
1931                         }
1932                 }
1933                 rcu_read_unlock();
1934         }
1935
1936         /* just to be sure */
1937         ieee80211_stop_poll(sdata);
1938
1939         ieee80211_led_assoc(local, 1);
1940
1941         if (sdata->u.mgd.have_beacon) {
1942                 /*
1943                  * If the AP is buggy we may get here with no DTIM period
1944                  * known, so assume it's 1 which is the only safe assumption
1945                  * in that case, although if the TIM IE is broken powersave
1946                  * probably just won't work at all.
1947                  */
1948                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1949                 bss_conf->beacon_rate = bss->beacon_rate;
1950                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1951         } else {
1952                 bss_conf->beacon_rate = NULL;
1953                 bss_conf->dtim_period = 0;
1954         }
1955
1956         bss_conf->assoc = 1;
1957
1958         /* Tell the driver to monitor connection quality (if supported) */
1959         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1960             bss_conf->cqm_rssi_thold)
1961                 bss_info_changed |= BSS_CHANGED_CQM;
1962
1963         /* Enable ARP filtering */
1964         if (bss_conf->arp_addr_cnt)
1965                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1966
1967         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1968
1969         mutex_lock(&local->iflist_mtx);
1970         ieee80211_recalc_ps(local, -1);
1971         mutex_unlock(&local->iflist_mtx);
1972
1973         ieee80211_recalc_smps(sdata);
1974         ieee80211_recalc_ps_vif(sdata);
1975
1976         netif_carrier_on(sdata->dev);
1977 }
1978
1979 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1980                                    u16 stype, u16 reason, bool tx,
1981                                    u8 *frame_buf)
1982 {
1983         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1984         struct ieee80211_local *local = sdata->local;
1985         u32 changed = 0;
1986
1987         sdata_assert_lock(sdata);
1988
1989         if (WARN_ON_ONCE(tx && !frame_buf))
1990                 return;
1991
1992         if (WARN_ON(!ifmgd->associated))
1993                 return;
1994
1995         ieee80211_stop_poll(sdata);
1996
1997         ifmgd->associated = NULL;
1998         netif_carrier_off(sdata->dev);
1999
2000         /*
2001          * if we want to get out of ps before disassoc (why?) we have
2002          * to do it before sending disassoc, as otherwise the null-packet
2003          * won't be valid.
2004          */
2005         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2006                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2007                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2008         }
2009         local->ps_sdata = NULL;
2010
2011         /* disable per-vif ps */
2012         ieee80211_recalc_ps_vif(sdata);
2013
2014         /*
2015          * drop any frame before deauth/disassoc, this can be data or
2016          * management frame. Since we are disconnecting, we should not
2017          * insist sending these frames which can take time and delay
2018          * the disconnection and possible the roaming.
2019          */
2020         if (tx)
2021                 ieee80211_flush_queues(local, sdata, true);
2022
2023         /* deauthenticate/disassociate now */
2024         if (tx || frame_buf)
2025                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2026                                                reason, tx, frame_buf);
2027
2028         /* flush out frame - make sure the deauth was actually sent */
2029         if (tx)
2030                 ieee80211_flush_queues(local, sdata, false);
2031
2032         /* clear bssid only after building the needed mgmt frames */
2033         memset(ifmgd->bssid, 0, ETH_ALEN);
2034
2035         /* remove AP and TDLS peers */
2036         sta_info_flush(sdata);
2037
2038         /* finally reset all BSS / config parameters */
2039         changed |= ieee80211_reset_erp_info(sdata);
2040
2041         ieee80211_led_assoc(local, 0);
2042         changed |= BSS_CHANGED_ASSOC;
2043         sdata->vif.bss_conf.assoc = false;
2044
2045         ifmgd->p2p_noa_index = -1;
2046         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2047                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2048
2049         /* on the next assoc, re-program HT/VHT parameters */
2050         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2051         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2052         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2053         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2054
2055         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2056
2057         del_timer_sync(&local->dynamic_ps_timer);
2058         cancel_work_sync(&local->dynamic_ps_enable_work);
2059
2060         /* Disable ARP filtering */
2061         if (sdata->vif.bss_conf.arp_addr_cnt)
2062                 changed |= BSS_CHANGED_ARP_FILTER;
2063
2064         sdata->vif.bss_conf.qos = false;
2065         changed |= BSS_CHANGED_QOS;
2066
2067         /* The BSSID (not really interesting) and HT changed */
2068         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2069         ieee80211_bss_info_change_notify(sdata, changed);
2070
2071         /* disassociated - set to defaults now */
2072         ieee80211_set_wmm_default(sdata, false);
2073
2074         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2075         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2076         del_timer_sync(&sdata->u.mgd.timer);
2077         del_timer_sync(&sdata->u.mgd.chswitch_timer);
2078
2079         sdata->vif.bss_conf.dtim_period = 0;
2080         sdata->vif.bss_conf.beacon_rate = NULL;
2081
2082         ifmgd->have_beacon = false;
2083
2084         ifmgd->flags = 0;
2085         mutex_lock(&local->mtx);
2086         ieee80211_vif_release_channel(sdata);
2087
2088         sdata->vif.csa_active = false;
2089         ifmgd->csa_waiting_bcn = false;
2090         if (sdata->csa_block_tx) {
2091                 ieee80211_wake_vif_queues(local, sdata,
2092                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2093                 sdata->csa_block_tx = false;
2094         }
2095         mutex_unlock(&local->mtx);
2096
2097         /* existing TX TSPEC sessions no longer exist */
2098         memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2099         cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2100
2101         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2102 }
2103
2104 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2105                              struct ieee80211_hdr *hdr)
2106 {
2107         /*
2108          * We can postpone the mgd.timer whenever receiving unicast frames
2109          * from AP because we know that the connection is working both ways
2110          * at that time. But multicast frames (and hence also beacons) must
2111          * be ignored here, because we need to trigger the timer during
2112          * data idle periods for sending the periodic probe request to the
2113          * AP we're connected to.
2114          */
2115         if (is_multicast_ether_addr(hdr->addr1))
2116                 return;
2117
2118         ieee80211_sta_reset_conn_monitor(sdata);
2119 }
2120
2121 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2122 {
2123         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2124         struct ieee80211_local *local = sdata->local;
2125
2126         mutex_lock(&local->mtx);
2127         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2128                 goto out;
2129
2130         __ieee80211_stop_poll(sdata);
2131
2132         mutex_lock(&local->iflist_mtx);
2133         ieee80211_recalc_ps(local, -1);
2134         mutex_unlock(&local->iflist_mtx);
2135
2136         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
2137                 goto out;
2138
2139         /*
2140          * We've received a probe response, but are not sure whether
2141          * we have or will be receiving any beacons or data, so let's
2142          * schedule the timers again, just in case.
2143          */
2144         ieee80211_sta_reset_beacon_monitor(sdata);
2145
2146         mod_timer(&ifmgd->conn_mon_timer,
2147                   round_jiffies_up(jiffies +
2148                                    IEEE80211_CONNECTION_IDLE_TIME));
2149 out:
2150         mutex_unlock(&local->mtx);
2151 }
2152
2153 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2154                                            struct ieee80211_hdr *hdr,
2155                                            u16 tx_time)
2156 {
2157         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2158         u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2159         int ac = ieee80211_ac_from_tid(tid);
2160         struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2161         unsigned long now = jiffies;
2162
2163         if (likely(!tx_tspec->admitted_time))
2164                 return;
2165
2166         if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2167                 tx_tspec->consumed_tx_time = 0;
2168                 tx_tspec->time_slice_start = now;
2169
2170                 if (tx_tspec->downgraded) {
2171                         tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2172                         schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2173                 }
2174         }
2175
2176         if (tx_tspec->downgraded)
2177                 return;
2178
2179         tx_tspec->consumed_tx_time += tx_time;
2180
2181         if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2182                 tx_tspec->downgraded = true;
2183                 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2184                 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2185         }
2186 }
2187
2188 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2189                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2190 {
2191         ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2192
2193         if (!ieee80211_is_data(hdr->frame_control))
2194             return;
2195
2196         if (ieee80211_is_nullfunc(hdr->frame_control) &&
2197             sdata->u.mgd.probe_send_count > 0) {
2198                 if (ack)
2199                         ieee80211_sta_reset_conn_monitor(sdata);
2200                 else
2201                         sdata->u.mgd.nullfunc_failed = true;
2202                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2203                 return;
2204         }
2205
2206         if (ack)
2207                 ieee80211_sta_reset_conn_monitor(sdata);
2208 }
2209
2210 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2211 {
2212         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2213         const u8 *ssid;
2214         u8 *dst = ifmgd->associated->bssid;
2215         u8 unicast_limit = max(1, max_probe_tries - 3);
2216
2217         /*
2218          * Try sending broadcast probe requests for the last three
2219          * probe requests after the first ones failed since some
2220          * buggy APs only support broadcast probe requests.
2221          */
2222         if (ifmgd->probe_send_count >= unicast_limit)
2223                 dst = NULL;
2224
2225         /*
2226          * When the hardware reports an accurate Tx ACK status, it's
2227          * better to send a nullfunc frame instead of a probe request,
2228          * as it will kick us off the AP quickly if we aren't associated
2229          * anymore. The timeout will be reset if the frame is ACKed by
2230          * the AP.
2231          */
2232         ifmgd->probe_send_count++;
2233
2234         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2235                 ifmgd->nullfunc_failed = false;
2236                 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2237         } else {
2238                 int ssid_len;
2239
2240                 rcu_read_lock();
2241                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2242                 if (WARN_ON_ONCE(ssid == NULL))
2243                         ssid_len = 0;
2244                 else
2245                         ssid_len = ssid[1];
2246
2247                 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
2248                                          ssid + 2, ssid_len, NULL,
2249                                          0, (u32) -1, true, 0,
2250                                          ifmgd->associated->channel, false);
2251                 rcu_read_unlock();
2252         }
2253
2254         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2255         run_again(sdata, ifmgd->probe_timeout);
2256 }
2257
2258 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2259                                    bool beacon)
2260 {
2261         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2262         bool already = false;
2263
2264         if (!ieee80211_sdata_running(sdata))
2265                 return;
2266
2267         sdata_lock(sdata);
2268
2269         if (!ifmgd->associated)
2270                 goto out;
2271
2272         mutex_lock(&sdata->local->mtx);
2273
2274         if (sdata->local->tmp_channel || sdata->local->scanning) {
2275                 mutex_unlock(&sdata->local->mtx);
2276                 goto out;
2277         }
2278
2279         if (beacon) {
2280                 mlme_dbg_ratelimited(sdata,
2281                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
2282                                      beacon_loss_count);
2283
2284                 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2285         }
2286
2287         /*
2288          * The driver/our work has already reported this event or the
2289          * connection monitoring has kicked in and we have already sent
2290          * a probe request. Or maybe the AP died and the driver keeps
2291          * reporting until we disassociate...
2292          *
2293          * In either case we have to ignore the current call to this
2294          * function (except for setting the correct probe reason bit)
2295          * because otherwise we would reset the timer every time and
2296          * never check whether we received a probe response!
2297          */
2298         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2299                 already = true;
2300
2301         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2302
2303         mutex_unlock(&sdata->local->mtx);
2304
2305         if (already)
2306                 goto out;
2307
2308         mutex_lock(&sdata->local->iflist_mtx);
2309         ieee80211_recalc_ps(sdata->local, -1);
2310         mutex_unlock(&sdata->local->iflist_mtx);
2311
2312         ifmgd->probe_send_count = 0;
2313         ieee80211_mgd_probe_ap_send(sdata);
2314  out:
2315         sdata_unlock(sdata);
2316 }
2317
2318 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2319                                           struct ieee80211_vif *vif)
2320 {
2321         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2322         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2323         struct cfg80211_bss *cbss;
2324         struct sk_buff *skb;
2325         const u8 *ssid;
2326         int ssid_len;
2327
2328         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2329                 return NULL;
2330
2331         sdata_assert_lock(sdata);
2332
2333         if (ifmgd->associated)
2334                 cbss = ifmgd->associated;
2335         else if (ifmgd->auth_data)
2336                 cbss = ifmgd->auth_data->bss;
2337         else if (ifmgd->assoc_data)
2338                 cbss = ifmgd->assoc_data->bss;
2339         else
2340                 return NULL;
2341
2342         rcu_read_lock();
2343         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2344         if (WARN_ON_ONCE(ssid == NULL))
2345                 ssid_len = 0;
2346         else
2347                 ssid_len = ssid[1];
2348
2349         skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2350                                         (u32) -1, cbss->channel,
2351                                         ssid + 2, ssid_len,
2352                                         NULL, 0, true);
2353         rcu_read_unlock();
2354
2355         return skb;
2356 }
2357 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2358
2359 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2360 {
2361         struct ieee80211_local *local = sdata->local;
2362         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2363         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2364
2365         sdata_lock(sdata);
2366         if (!ifmgd->associated) {
2367                 sdata_unlock(sdata);
2368                 return;
2369         }
2370
2371         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2372                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2373                                true, frame_buf);
2374         mutex_lock(&local->mtx);
2375         sdata->vif.csa_active = false;
2376         ifmgd->csa_waiting_bcn = false;
2377         if (sdata->csa_block_tx) {
2378                 ieee80211_wake_vif_queues(local, sdata,
2379                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2380                 sdata->csa_block_tx = false;
2381         }
2382         mutex_unlock(&local->mtx);
2383
2384         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2385                               IEEE80211_DEAUTH_FRAME_LEN);
2386         sdata_unlock(sdata);
2387 }
2388
2389 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2390 {
2391         struct ieee80211_sub_if_data *sdata =
2392                 container_of(work, struct ieee80211_sub_if_data,
2393                              u.mgd.beacon_connection_loss_work);
2394         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2395         struct sta_info *sta;
2396
2397         if (ifmgd->associated) {
2398                 rcu_read_lock();
2399                 sta = sta_info_get(sdata, ifmgd->bssid);
2400                 if (sta)
2401                         sta->beacon_loss_count++;
2402                 rcu_read_unlock();
2403         }
2404
2405         if (ifmgd->connection_loss) {
2406                 sdata_info(sdata, "Connection to AP %pM lost\n",
2407                            ifmgd->bssid);
2408                 __ieee80211_disconnect(sdata);
2409         } else {
2410                 ieee80211_mgd_probe_ap(sdata, true);
2411         }
2412 }
2413
2414 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2415 {
2416         struct ieee80211_sub_if_data *sdata =
2417                 container_of(work, struct ieee80211_sub_if_data,
2418                              u.mgd.csa_connection_drop_work);
2419
2420         __ieee80211_disconnect(sdata);
2421 }
2422
2423 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2424 {
2425         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2426         struct ieee80211_hw *hw = &sdata->local->hw;
2427
2428         trace_api_beacon_loss(sdata);
2429
2430         sdata->u.mgd.connection_loss = false;
2431         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2432 }
2433 EXPORT_SYMBOL(ieee80211_beacon_loss);
2434
2435 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2436 {
2437         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2438         struct ieee80211_hw *hw = &sdata->local->hw;
2439
2440         trace_api_connection_loss(sdata);
2441
2442         sdata->u.mgd.connection_loss = true;
2443         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2444 }
2445 EXPORT_SYMBOL(ieee80211_connection_loss);
2446
2447
2448 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2449                                         bool assoc)
2450 {
2451         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2452
2453         sdata_assert_lock(sdata);
2454
2455         if (!assoc) {
2456                 /*
2457                  * we are not authenticated yet, the only timer that could be
2458                  * running is the timeout for the authentication response which
2459                  * which is not relevant anymore.
2460                  */
2461                 del_timer_sync(&sdata->u.mgd.timer);
2462                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2463
2464                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2465                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2466                 sdata->u.mgd.flags = 0;
2467                 mutex_lock(&sdata->local->mtx);
2468                 ieee80211_vif_release_channel(sdata);
2469                 mutex_unlock(&sdata->local->mtx);
2470         }
2471
2472         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2473         kfree(auth_data);
2474         sdata->u.mgd.auth_data = NULL;
2475 }
2476
2477 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2478                                      struct ieee80211_mgmt *mgmt, size_t len)
2479 {
2480         struct ieee80211_local *local = sdata->local;
2481         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2482         u8 *pos;
2483         struct ieee802_11_elems elems;
2484         u32 tx_flags = 0;
2485
2486         pos = mgmt->u.auth.variable;
2487         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2488         if (!elems.challenge)
2489                 return;
2490         auth_data->expected_transaction = 4;
2491         drv_mgd_prepare_tx(sdata->local, sdata);
2492         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2493                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2494                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2495         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2496                             elems.challenge - 2, elems.challenge_len + 2,
2497                             auth_data->bss->bssid, auth_data->bss->bssid,
2498                             auth_data->key, auth_data->key_len,
2499                             auth_data->key_idx, tx_flags);
2500 }
2501
2502 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2503                                    struct ieee80211_mgmt *mgmt, size_t len)
2504 {
2505         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2506         u8 bssid[ETH_ALEN];
2507         u16 auth_alg, auth_transaction, status_code;
2508         struct sta_info *sta;
2509
2510         sdata_assert_lock(sdata);
2511
2512         if (len < 24 + 6)
2513                 return;
2514
2515         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2516                 return;
2517
2518         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2519
2520         if (!ether_addr_equal(bssid, mgmt->bssid))
2521                 return;
2522
2523         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2524         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2525         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2526
2527         if (auth_alg != ifmgd->auth_data->algorithm ||
2528             auth_transaction != ifmgd->auth_data->expected_transaction) {
2529                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2530                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2531                            auth_transaction,
2532                            ifmgd->auth_data->expected_transaction);
2533                 return;
2534         }
2535
2536         if (status_code != WLAN_STATUS_SUCCESS) {
2537                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2538                            mgmt->sa, status_code);
2539                 ieee80211_destroy_auth_data(sdata, false);
2540                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2541                 return;
2542         }
2543
2544         switch (ifmgd->auth_data->algorithm) {
2545         case WLAN_AUTH_OPEN:
2546         case WLAN_AUTH_LEAP:
2547         case WLAN_AUTH_FT:
2548         case WLAN_AUTH_SAE:
2549                 break;
2550         case WLAN_AUTH_SHARED_KEY:
2551                 if (ifmgd->auth_data->expected_transaction != 4) {
2552                         ieee80211_auth_challenge(sdata, mgmt, len);
2553                         /* need another frame */
2554                         return;
2555                 }
2556                 break;
2557         default:
2558                 WARN_ONCE(1, "invalid auth alg %d",
2559                           ifmgd->auth_data->algorithm);
2560                 return;
2561         }
2562
2563         sdata_info(sdata, "authenticated\n");
2564         ifmgd->auth_data->done = true;
2565         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2566         ifmgd->auth_data->timeout_started = true;
2567         run_again(sdata, ifmgd->auth_data->timeout);
2568
2569         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2570             ifmgd->auth_data->expected_transaction != 2) {
2571                 /*
2572                  * Report auth frame to user space for processing since another
2573                  * round of Authentication frames is still needed.
2574                  */
2575                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2576                 return;
2577         }
2578
2579         /* move station state to auth */
2580         mutex_lock(&sdata->local->sta_mtx);
2581         sta = sta_info_get(sdata, bssid);
2582         if (!sta) {
2583                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2584                 goto out_err;
2585         }
2586         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2587                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2588                 goto out_err;
2589         }
2590         mutex_unlock(&sdata->local->sta_mtx);
2591
2592         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2593         return;
2594  out_err:
2595         mutex_unlock(&sdata->local->sta_mtx);
2596         /* ignore frame -- wait for timeout */
2597 }
2598
2599 #define case_WLAN(type) \
2600         case WLAN_REASON_##type: return #type
2601
2602 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2603 {
2604         switch (reason_code) {
2605         case_WLAN(UNSPECIFIED);
2606         case_WLAN(PREV_AUTH_NOT_VALID);
2607         case_WLAN(DEAUTH_LEAVING);
2608         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2609         case_WLAN(DISASSOC_AP_BUSY);
2610         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2611         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2612         case_WLAN(DISASSOC_STA_HAS_LEFT);
2613         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2614         case_WLAN(DISASSOC_BAD_POWER);
2615         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2616         case_WLAN(INVALID_IE);
2617         case_WLAN(MIC_FAILURE);
2618         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2619         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2620         case_WLAN(IE_DIFFERENT);
2621         case_WLAN(INVALID_GROUP_CIPHER);
2622         case_WLAN(INVALID_PAIRWISE_CIPHER);
2623         case_WLAN(INVALID_AKMP);
2624         case_WLAN(UNSUPP_RSN_VERSION);
2625         case_WLAN(INVALID_RSN_IE_CAP);
2626         case_WLAN(IEEE8021X_FAILED);
2627         case_WLAN(CIPHER_SUITE_REJECTED);
2628         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2629         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2630         case_WLAN(DISASSOC_LOW_ACK);
2631         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2632         case_WLAN(QSTA_LEAVE_QBSS);
2633         case_WLAN(QSTA_NOT_USE);
2634         case_WLAN(QSTA_REQUIRE_SETUP);
2635         case_WLAN(QSTA_TIMEOUT);
2636         case_WLAN(QSTA_CIPHER_NOT_SUPP);
2637         case_WLAN(MESH_PEER_CANCELED);
2638         case_WLAN(MESH_MAX_PEERS);
2639         case_WLAN(MESH_CONFIG);
2640         case_WLAN(MESH_CLOSE);
2641         case_WLAN(MESH_MAX_RETRIES);
2642         case_WLAN(MESH_CONFIRM_TIMEOUT);
2643         case_WLAN(MESH_INVALID_GTK);
2644         case_WLAN(MESH_INCONSISTENT_PARAM);
2645         case_WLAN(MESH_INVALID_SECURITY);
2646         case_WLAN(MESH_PATH_ERROR);
2647         case_WLAN(MESH_PATH_NOFORWARD);
2648         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2649         case_WLAN(MAC_EXISTS_IN_MBSS);
2650         case_WLAN(MESH_CHAN_REGULATORY);
2651         case_WLAN(MESH_CHAN);
2652         default: return "<unknown>";
2653         }
2654 }
2655
2656 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2657                                      struct ieee80211_mgmt *mgmt, size_t len)
2658 {
2659         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2660         const u8 *bssid = NULL;
2661         u16 reason_code;
2662
2663         sdata_assert_lock(sdata);
2664
2665         if (len < 24 + 2)
2666                 return;
2667
2668         if (!ifmgd->associated ||
2669             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2670                 return;
2671
2672         bssid = ifmgd->associated->bssid;
2673
2674         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2675
2676         sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2677                    bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
2678
2679         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2680
2681         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2682 }
2683
2684
2685 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2686                                        struct ieee80211_mgmt *mgmt, size_t len)
2687 {
2688         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2689         u16 reason_code;
2690
2691         sdata_assert_lock(sdata);
2692
2693         if (len < 24 + 2)
2694                 return;
2695
2696         if (!ifmgd->associated ||
2697             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2698                 return;
2699
2700         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2701
2702         sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2703                    mgmt->sa, reason_code);
2704
2705         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2706
2707         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2708 }
2709
2710 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2711                                 u8 *supp_rates, unsigned int supp_rates_len,
2712                                 u32 *rates, u32 *basic_rates,
2713                                 bool *have_higher_than_11mbit,
2714                                 int *min_rate, int *min_rate_index,
2715                                 int shift, u32 rate_flags)
2716 {
2717         int i, j;
2718
2719         for (i = 0; i < supp_rates_len; i++) {
2720                 int rate = supp_rates[i] & 0x7f;
2721                 bool is_basic = !!(supp_rates[i] & 0x80);
2722
2723                 if ((rate * 5 * (1 << shift)) > 110)
2724                         *have_higher_than_11mbit = true;
2725
2726                 /*
2727                  * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2728                  * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2729                  *
2730                  * Note: Even through the membership selector and the basic
2731                  *       rate flag share the same bit, they are not exactly
2732                  *       the same.
2733                  */
2734                 if (!!(supp_rates[i] & 0x80) &&
2735                     (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2736                         continue;
2737
2738                 for (j = 0; j < sband->n_bitrates; j++) {
2739                         struct ieee80211_rate *br;
2740                         int brate;
2741
2742                         br = &sband->bitrates[j];
2743                         if ((rate_flags & br->flags) != rate_flags)
2744                                 continue;
2745
2746                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2747                         if (brate == rate) {
2748                                 *rates |= BIT(j);
2749                                 if (is_basic)
2750                                         *basic_rates |= BIT(j);
2751                                 if ((rate * 5) < *min_rate) {
2752                                         *min_rate = rate * 5;
2753                                         *min_rate_index = j;
2754                                 }
2755                                 break;
2756                         }
2757                 }
2758         }
2759 }
2760
2761 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2762                                          bool assoc)
2763 {
2764         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2765
2766         sdata_assert_lock(sdata);
2767
2768         if (!assoc) {
2769                 /*
2770                  * we are not associated yet, the only timer that could be
2771                  * running is the timeout for the association response which
2772                  * which is not relevant anymore.
2773                  */
2774                 del_timer_sync(&sdata->u.mgd.timer);
2775                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2776
2777                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2778                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2779                 sdata->u.mgd.flags = 0;
2780                 mutex_lock(&sdata->local->mtx);
2781                 ieee80211_vif_release_channel(sdata);
2782                 mutex_unlock(&sdata->local->mtx);
2783         }
2784
2785         kfree(assoc_data);
2786         sdata->u.mgd.assoc_data = NULL;
2787 }
2788
2789 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2790                                     struct cfg80211_bss *cbss,
2791                                     struct ieee80211_mgmt *mgmt, size_t len)
2792 {
2793         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2794         struct ieee80211_local *local = sdata->local;
2795         struct ieee80211_supported_band *sband;
2796         struct sta_info *sta;
2797         u8 *pos;
2798         u16 capab_info, aid;
2799         struct ieee802_11_elems elems;
2800         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2801         const struct cfg80211_bss_ies *bss_ies = NULL;
2802         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2803         u32 changed = 0;
2804         int err;
2805         bool ret;
2806
2807         /* AssocResp and ReassocResp have identical structure */
2808
2809         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2810         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2811
2812         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2813                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2814                            aid);
2815         aid &= ~(BIT(15) | BIT(14));
2816
2817         ifmgd->broken_ap = false;
2818
2819         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2820                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2821                            aid);
2822                 aid = 0;
2823                 ifmgd->broken_ap = true;
2824         }
2825
2826         pos = mgmt->u.assoc_resp.variable;
2827         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2828
2829         if (!elems.supp_rates) {
2830                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2831                 return false;
2832         }
2833
2834         ifmgd->aid = aid;
2835         ifmgd->tdls_chan_switch_prohibited =
2836                 elems.ext_capab && elems.ext_capab_len >= 5 &&
2837                 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2838
2839         /*
2840          * Some APs are erroneously not including some information in their
2841          * (re)association response frames. Try to recover by using the data
2842          * from the beacon or probe response. This seems to afflict mobile
2843          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2844          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2845          */
2846         if ((assoc_data->wmm && !elems.wmm_param) ||
2847             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2848              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2849             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2850              (!elems.vht_cap_elem || !elems.vht_operation))) {
2851                 const struct cfg80211_bss_ies *ies;
2852                 struct ieee802_11_elems bss_elems;
2853
2854                 rcu_read_lock();
2855                 ies = rcu_dereference(cbss->ies);
2856                 if (ies)
2857                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2858                                           GFP_ATOMIC);
2859                 rcu_read_unlock();
2860                 if (!bss_ies)
2861                         return false;
2862
2863                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2864                                        false, &bss_elems);
2865                 if (assoc_data->wmm &&
2866                     !elems.wmm_param && bss_elems.wmm_param) {
2867                         elems.wmm_param = bss_elems.wmm_param;
2868                         sdata_info(sdata,
2869                                    "AP bug: WMM param missing from AssocResp\n");
2870                 }
2871
2872                 /*
2873                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2874                  * have to include the IEs in the (re)association response.
2875                  */
2876                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2877                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2878                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2879                         sdata_info(sdata,
2880                                    "AP bug: HT capability missing from AssocResp\n");
2881                 }
2882                 if (!elems.ht_operation && bss_elems.ht_operation &&
2883                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2884                         elems.ht_operation = bss_elems.ht_operation;
2885                         sdata_info(sdata,
2886                                    "AP bug: HT operation missing from AssocResp\n");
2887                 }
2888                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2889                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2890                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
2891                         sdata_info(sdata,
2892                                    "AP bug: VHT capa missing from AssocResp\n");
2893                 }
2894                 if (!elems.vht_operation && bss_elems.vht_operation &&
2895                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2896                         elems.vht_operation = bss_elems.vht_operation;
2897                         sdata_info(sdata,
2898                                    "AP bug: VHT operation missing from AssocResp\n");
2899                 }
2900         }
2901
2902         /*
2903          * We previously checked these in the beacon/probe response, so
2904          * they should be present here. This is just a safety net.
2905          */
2906         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2907             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2908                 sdata_info(sdata,
2909                            "HT AP is missing WMM params or HT capability/operation\n");
2910                 ret = false;
2911                 goto out;
2912         }
2913
2914         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2915             (!elems.vht_cap_elem || !elems.vht_operation)) {
2916                 sdata_info(sdata,
2917                            "VHT AP is missing VHT capability/operation\n");
2918                 ret = false;
2919                 goto out;
2920         }
2921
2922         mutex_lock(&sdata->local->sta_mtx);
2923         /*
2924          * station info was already allocated and inserted before
2925          * the association and should be available to us
2926          */
2927         sta = sta_info_get(sdata, cbss->bssid);
2928         if (WARN_ON(!sta)) {
2929                 mutex_unlock(&sdata->local->sta_mtx);
2930                 ret = false;
2931                 goto out;
2932         }
2933
2934         sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2935
2936         /* Set up internal HT/VHT capabilities */
2937         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2938                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2939                                                   elems.ht_cap_elem, sta);
2940
2941         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2942                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2943                                                     elems.vht_cap_elem, sta);
2944
2945         /*
2946          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2947          * in their association response, so ignore that data for our own
2948          * configuration. If it changed since the last beacon, we'll get the
2949          * next beacon and update then.
2950          */
2951
2952         /*
2953          * If an operating mode notification IE is present, override the
2954          * NSS calculation (that would be done in rate_control_rate_init())
2955          * and use the # of streams from that element.
2956          */
2957         if (elems.opmode_notif &&
2958             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2959                 u8 nss;
2960
2961                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2962                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2963                 nss += 1;
2964                 sta->sta.rx_nss = nss;
2965         }
2966
2967         rate_control_rate_init(sta);
2968
2969         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2970                 set_sta_flag(sta, WLAN_STA_MFP);
2971
2972         sta->sta.wme = elems.wmm_param;
2973
2974         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2975         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2976                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2977         if (err) {
2978                 sdata_info(sdata,
2979                            "failed to move station %pM to desired state\n",
2980                            sta->sta.addr);
2981                 WARN_ON(__sta_info_destroy(sta));
2982                 mutex_unlock(&sdata->local->sta_mtx);
2983                 ret = false;
2984                 goto out;
2985         }
2986
2987         mutex_unlock(&sdata->local->sta_mtx);
2988
2989         /*
2990          * Always handle WMM once after association regardless
2991          * of the first value the AP uses. Setting -1 here has
2992          * that effect because the AP values is an unsigned
2993          * 4-bit value.
2994          */
2995         ifmgd->wmm_last_param_set = -1;
2996
2997         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
2998                 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2999                                          elems.wmm_param_len);
3000         else
3001                 ieee80211_set_wmm_default(sdata, false);
3002         changed |= BSS_CHANGED_QOS;
3003
3004         /* set AID and assoc capability,
3005          * ieee80211_set_associated() will tell the driver */
3006         bss_conf->aid = aid;
3007         bss_conf->assoc_capability = capab_info;
3008         ieee80211_set_associated(sdata, cbss, changed);
3009
3010         /*
3011          * If we're using 4-addr mode, let the AP know that we're
3012          * doing so, so that it can create the STA VLAN on its side
3013          */
3014         if (ifmgd->use_4addr)
3015                 ieee80211_send_4addr_nullfunc(local, sdata);
3016
3017         /*
3018          * Start timer to probe the connection to the AP now.
3019          * Also start the timer that will detect beacon loss.
3020          */
3021         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3022         ieee80211_sta_reset_beacon_monitor(sdata);
3023
3024         ret = true;
3025  out:
3026         kfree(bss_ies);
3027         return ret;
3028 }
3029
3030 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3031                                          struct ieee80211_mgmt *mgmt,
3032                                          size_t len)
3033 {
3034         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3035         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3036         u16 capab_info, status_code, aid;
3037         struct ieee802_11_elems elems;
3038         int ac, uapsd_queues = -1;
3039         u8 *pos;
3040         bool reassoc;
3041         struct cfg80211_bss *bss;
3042
3043         sdata_assert_lock(sdata);
3044
3045         if (!assoc_data)
3046                 return;
3047         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3048                 return;
3049
3050         /*
3051          * AssocResp and ReassocResp have identical structure, so process both
3052          * of them in this function.
3053          */
3054
3055         if (len < 24 + 6)
3056                 return;
3057
3058         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3059         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3060         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3061         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3062
3063         sdata_info(sdata,
3064                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3065                    reassoc ? "Rea" : "A", mgmt->sa,
3066                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3067
3068         pos = mgmt->u.assoc_resp.variable;
3069         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3070
3071         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3072             elems.timeout_int &&
3073             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3074                 u32 tu, ms;
3075                 tu = le32_to_cpu(elems.timeout_int->value);
3076                 ms = tu * 1024 / 1000;
3077                 sdata_info(sdata,
3078                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3079                            mgmt->sa, tu, ms);
3080                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3081                 assoc_data->timeout_started = true;
3082                 if (ms > IEEE80211_ASSOC_TIMEOUT)
3083                         run_again(sdata, assoc_data->timeout);
3084                 return;
3085         }
3086
3087         bss = assoc_data->bss;
3088
3089         if (status_code != WLAN_STATUS_SUCCESS) {
3090                 sdata_info(sdata, "%pM denied association (code=%d)\n",
3091                            mgmt->sa, status_code);
3092                 ieee80211_destroy_assoc_data(sdata, false);
3093         } else {
3094                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3095                         /* oops -- internal error -- send timeout for now */
3096                         ieee80211_destroy_assoc_data(sdata, false);
3097                         cfg80211_assoc_timeout(sdata->dev, bss);
3098                         return;
3099                 }
3100                 sdata_info(sdata, "associated\n");
3101
3102                 /*
3103                  * destroy assoc_data afterwards, as otherwise an idle
3104                  * recalc after assoc_data is NULL but before associated
3105                  * is set can cause the interface to go idle
3106                  */
3107                 ieee80211_destroy_assoc_data(sdata, true);
3108
3109                 /* get uapsd queues configuration */
3110                 uapsd_queues = 0;
3111                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3112                         if (sdata->tx_conf[ac].uapsd)
3113                                 uapsd_queues |= BIT(ac);
3114         }
3115
3116         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3117 }
3118
3119 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3120                                   struct ieee80211_mgmt *mgmt, size_t len,
3121                                   struct ieee80211_rx_status *rx_status,
3122                                   struct ieee802_11_elems *elems)
3123 {
3124         struct ieee80211_local *local = sdata->local;
3125         struct ieee80211_bss *bss;
3126         struct ieee80211_channel *channel;
3127
3128         sdata_assert_lock(sdata);
3129
3130         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3131         if (!channel)
3132                 return;
3133
3134         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3135                                         channel);
3136         if (bss) {
3137                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3138                 ieee80211_rx_bss_put(local, bss);
3139         }
3140 }
3141
3142
3143 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3144                                          struct sk_buff *skb)
3145 {
3146         struct ieee80211_mgmt *mgmt = (void *)skb->data;
3147         struct ieee80211_if_managed *ifmgd;
3148         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3149         size_t baselen, len = skb->len;
3150         struct ieee802_11_elems elems;
3151
3152         ifmgd = &sdata->u.mgd;
3153
3154         sdata_assert_lock(sdata);
3155
3156         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3157                 return; /* ignore ProbeResp to foreign address */
3158
3159         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3160         if (baselen > len)
3161                 return;
3162
3163         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3164                                false, &elems);
3165
3166         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3167
3168         if (ifmgd->associated &&
3169             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3170                 ieee80211_reset_ap_probe(sdata);
3171
3172         if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
3173             ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
3174                 /* got probe response, continue with auth */
3175                 sdata_info(sdata, "direct probe responded\n");
3176                 ifmgd->auth_data->tries = 0;
3177                 ifmgd->auth_data->timeout = jiffies;
3178                 ifmgd->auth_data->timeout_started = true;
3179                 run_again(sdata, ifmgd->auth_data->timeout);
3180         }
3181 }
3182
3183 /*
3184  * This is the canonical list of information elements we care about,
3185  * the filter code also gives us all changes to the Microsoft OUI
3186  * (00:50:F2) vendor IE which is used for WMM which we need to track,
3187  * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3188  * changes to requested client power.
3189  *
3190  * We implement beacon filtering in software since that means we can
3191  * avoid processing the frame here and in cfg80211, and userspace
3192  * will not be able to tell whether the hardware supports it or not.
3193  *
3194  * XXX: This list needs to be dynamic -- userspace needs to be able to
3195  *      add items it requires. It also needs to be able to tell us to
3196  *      look out for other vendor IEs.
3197  */
3198 static const u64 care_about_ies =
3199         (1ULL << WLAN_EID_COUNTRY) |
3200         (1ULL << WLAN_EID_ERP_INFO) |
3201         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3202         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3203         (1ULL << WLAN_EID_HT_CAPABILITY) |
3204         (1ULL << WLAN_EID_HT_OPERATION);
3205
3206 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3207                                      struct ieee80211_mgmt *mgmt, size_t len,
3208                                      struct ieee80211_rx_status *rx_status)
3209 {
3210         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3211         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3212         size_t baselen;
3213         struct ieee802_11_elems elems;
3214         struct ieee80211_local *local = sdata->local;
3215         struct ieee80211_chanctx_conf *chanctx_conf;
3216         struct ieee80211_channel *chan;
3217         struct sta_info *sta;
3218         u32 changed = 0;
3219         bool erp_valid;
3220         u8 erp_value = 0;
3221         u32 ncrc;
3222         u8 *bssid;
3223         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3224
3225         sdata_assert_lock(sdata);
3226
3227         /* Process beacon from the current BSS */
3228         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3229         if (baselen > len)
3230                 return;
3231
3232         rcu_read_lock();
3233         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3234         if (!chanctx_conf) {
3235                 rcu_read_unlock();
3236                 return;
3237         }
3238
3239         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3240                 rcu_read_unlock();
3241                 return;
3242         }
3243         chan = chanctx_conf->def.chan;
3244         rcu_read_unlock();
3245
3246         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3247             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3248                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3249                                        len - baselen, false, &elems);
3250
3251                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3252                 if (elems.tim && !elems.parse_error) {
3253                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
3254                         ifmgd->dtim_period = tim_ie->dtim_period;
3255                 }
3256                 ifmgd->have_beacon = true;
3257                 ifmgd->assoc_data->need_beacon = false;
3258                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3259                         sdata->vif.bss_conf.sync_tsf =
3260                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3261                         sdata->vif.bss_conf.sync_device_ts =
3262                                 rx_status->device_timestamp;
3263                         if (elems.tim)
3264                                 sdata->vif.bss_conf.sync_dtim_count =
3265                                         elems.tim->dtim_count;
3266                         else
3267                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3268                 }
3269                 /* continue assoc process */
3270                 ifmgd->assoc_data->timeout = jiffies;
3271                 ifmgd->assoc_data->timeout_started = true;
3272                 run_again(sdata, ifmgd->assoc_data->timeout);
3273                 return;
3274         }
3275
3276         if (!ifmgd->associated ||
3277             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3278                 return;
3279         bssid = ifmgd->associated->bssid;
3280
3281         /* Track average RSSI from the Beacon frames of the current AP */
3282         ifmgd->last_beacon_signal = rx_status->signal;
3283         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3284                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3285                 ifmgd->ave_beacon_signal = rx_status->signal * 16;
3286                 ifmgd->last_cqm_event_signal = 0;
3287                 ifmgd->count_beacon_signal = 1;
3288                 ifmgd->last_ave_beacon_signal = 0;
3289         } else {
3290                 ifmgd->ave_beacon_signal =
3291                         (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3292                          (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3293                          ifmgd->ave_beacon_signal) / 16;
3294                 ifmgd->count_beacon_signal++;
3295         }
3296
3297         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3298             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3299                 int sig = ifmgd->ave_beacon_signal;
3300                 int last_sig = ifmgd->last_ave_beacon_signal;
3301
3302                 /*
3303                  * if signal crosses either of the boundaries, invoke callback
3304                  * with appropriate parameters
3305                  */
3306                 if (sig > ifmgd->rssi_max_thold &&
3307                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3308                         ifmgd->last_ave_beacon_signal = sig;
3309                         drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3310                 } else if (sig < ifmgd->rssi_min_thold &&
3311                            (last_sig >= ifmgd->rssi_max_thold ||
3312                            last_sig == 0)) {
3313                         ifmgd->last_ave_beacon_signal = sig;
3314                         drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3315                 }
3316         }
3317
3318         if (bss_conf->cqm_rssi_thold &&
3319             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3320             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3321                 int sig = ifmgd->ave_beacon_signal / 16;
3322                 int last_event = ifmgd->last_cqm_event_signal;
3323                 int thold = bss_conf->cqm_rssi_thold;
3324                 int hyst = bss_conf->cqm_rssi_hyst;
3325                 if (sig < thold &&
3326                     (last_event == 0 || sig < last_event - hyst)) {
3327                         ifmgd->last_cqm_event_signal = sig;
3328                         ieee80211_cqm_rssi_notify(
3329                                 &sdata->vif,
3330                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3331                                 GFP_KERNEL);
3332                 } else if (sig > thold &&
3333                            (last_event == 0 || sig > last_event + hyst)) {
3334                         ifmgd->last_cqm_event_signal = sig;
3335                         ieee80211_cqm_rssi_notify(
3336                                 &sdata->vif,
3337                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3338                                 GFP_KERNEL);
3339                 }
3340         }
3341
3342         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3343                 mlme_dbg_ratelimited(sdata,
3344                                      "cancelling AP probe due to a received beacon\n");
3345                 ieee80211_reset_ap_probe(sdata);
3346         }
3347
3348         /*
3349          * Push the beacon loss detection into the future since
3350          * we are processing a beacon from the AP just now.
3351          */
3352         ieee80211_sta_reset_beacon_monitor(sdata);
3353
3354         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3355         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3356                                           len - baselen, false, &elems,
3357                                           care_about_ies, ncrc);
3358
3359         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3360                 bool directed_tim = ieee80211_check_tim(elems.tim,
3361                                                         elems.tim_len,
3362                                                         ifmgd->aid);
3363                 if (directed_tim) {
3364                         if (local->hw.conf.dynamic_ps_timeout > 0) {
3365                                 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3366                                         local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3367                                         ieee80211_hw_config(local,
3368                                                             IEEE80211_CONF_CHANGE_PS);
3369                                 }
3370                                 ieee80211_send_nullfunc(local, sdata, 0);
3371                         } else if (!local->pspolling && sdata->u.mgd.powersave) {
3372                                 local->pspolling = true;
3373
3374                                 /*
3375                                  * Here is assumed that the driver will be
3376                                  * able to send ps-poll frame and receive a
3377                                  * response even though power save mode is
3378                                  * enabled, but some drivers might require
3379                                  * to disable power save here. This needs
3380                                  * to be investigated.
3381                                  */
3382                                 ieee80211_send_pspoll(local, sdata);
3383                         }
3384                 }
3385         }
3386
3387         if (sdata->vif.p2p) {
3388                 struct ieee80211_p2p_noa_attr noa = {};
3389                 int ret;
3390
3391                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3392                                             len - baselen,
3393                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3394                                             (u8 *) &noa, sizeof(noa));
3395                 if (ret >= 2) {
3396                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3397                                 /* valid noa_attr and index changed */
3398                                 sdata->u.mgd.p2p_noa_index = noa.index;
3399                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3400                                 changed |= BSS_CHANGED_P2P_PS;
3401                                 /*
3402                                  * make sure we update all information, the CRC
3403                                  * mechanism doesn't look at P2P attributes.
3404                                  */
3405                                 ifmgd->beacon_crc_valid = false;
3406                         }
3407                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3408                         /* noa_attr not found and we had valid noa_attr before */
3409                         sdata->u.mgd.p2p_noa_index = -1;
3410                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3411                         changed |= BSS_CHANGED_P2P_PS;
3412                         ifmgd->beacon_crc_valid = false;
3413                 }
3414         }
3415
3416         if (ifmgd->csa_waiting_bcn)
3417                 ieee80211_chswitch_post_beacon(sdata);
3418
3419         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3420                 return;
3421         ifmgd->beacon_crc = ncrc;
3422         ifmgd->beacon_crc_valid = true;
3423
3424         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3425
3426         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3427                                          rx_status->device_timestamp,
3428                                          &elems, true);
3429
3430         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3431             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3432                                      elems.wmm_param_len))
3433                 changed |= BSS_CHANGED_QOS;
3434
3435         /*
3436          * If we haven't had a beacon before, tell the driver about the
3437          * DTIM period (and beacon timing if desired) now.
3438          */
3439         if (!ifmgd->have_beacon) {
3440                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3441                 if (elems.tim)
3442                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3443                 else
3444                         bss_conf->dtim_period = 1;
3445
3446                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3447                         sdata->vif.bss_conf.sync_tsf =
3448                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3449                         sdata->vif.bss_conf.sync_device_ts =
3450                                 rx_status->device_timestamp;
3451                         if (elems.tim)
3452                                 sdata->vif.bss_conf.sync_dtim_count =
3453                                         elems.tim->dtim_count;
3454                         else
3455                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3456                 }
3457
3458                 changed |= BSS_CHANGED_BEACON_INFO;
3459                 ifmgd->have_beacon = true;
3460
3461                 mutex_lock(&local->iflist_mtx);
3462                 ieee80211_recalc_ps(local, -1);
3463                 mutex_unlock(&local->iflist_mtx);
3464
3465                 ieee80211_recalc_ps_vif(sdata);
3466         }
3467
3468         if (elems.erp_info) {
3469                 erp_valid = true;
3470                 erp_value = elems.erp_info[0];
3471         } else {
3472                 erp_valid = false;
3473         }
3474         changed |= ieee80211_handle_bss_capability(sdata,
3475                         le16_to_cpu(mgmt->u.beacon.capab_info),
3476                         erp_valid, erp_value);
3477
3478         mutex_lock(&local->sta_mtx);
3479         sta = sta_info_get(sdata, bssid);
3480
3481         if (ieee80211_config_bw(sdata, sta,
3482                                 elems.ht_cap_elem, elems.ht_operation,
3483                                 elems.vht_operation, bssid, &changed)) {
3484                 mutex_unlock(&local->sta_mtx);
3485                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3486                                        WLAN_REASON_DEAUTH_LEAVING,
3487                                        true, deauth_buf);
3488                 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3489                                       sizeof(deauth_buf));
3490                 return;
3491         }
3492
3493         if (sta && elems.opmode_notif)
3494                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3495                                             rx_status->band, true);
3496         mutex_unlock(&local->sta_mtx);
3497
3498         changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3499                                                elems.country_elem,
3500                                                elems.country_elem_len,
3501                                                elems.pwr_constr_elem,
3502                                                elems.cisco_dtpc_elem);
3503
3504         ieee80211_bss_info_change_notify(sdata, changed);
3505 }
3506
3507 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3508                                   struct sk_buff *skb)
3509 {
3510         struct ieee80211_rx_status *rx_status;
3511         struct ieee80211_mgmt *mgmt;
3512         u16 fc;
3513         struct ieee802_11_elems elems;
3514         int ies_len;
3515
3516         rx_status = (struct ieee80211_rx_status *) skb->cb;
3517         mgmt = (struct ieee80211_mgmt *) skb->data;
3518         fc = le16_to_cpu(mgmt->frame_control);
3519
3520         sdata_lock(sdata);
3521
3522         switch (fc & IEEE80211_FCTL_STYPE) {
3523         case IEEE80211_STYPE_BEACON:
3524                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3525                 break;
3526         case IEEE80211_STYPE_PROBE_RESP:
3527                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3528                 break;
3529         case IEEE80211_STYPE_AUTH:
3530                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3531                 break;
3532         case IEEE80211_STYPE_DEAUTH:
3533                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3534                 break;
3535         case IEEE80211_STYPE_DISASSOC:
3536                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3537                 break;
3538         case IEEE80211_STYPE_ASSOC_RESP:
3539         case IEEE80211_STYPE_REASSOC_RESP:
3540                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3541                 break;
3542         case IEEE80211_STYPE_ACTION:
3543                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3544                         ies_len = skb->len -
3545                                   offsetof(struct ieee80211_mgmt,
3546                                            u.action.u.chan_switch.variable);
3547
3548                         if (ies_len < 0)
3549                                 break;
3550
3551                         ieee802_11_parse_elems(
3552                                 mgmt->u.action.u.chan_switch.variable,
3553                                 ies_len, true, &elems);
3554
3555                         if (elems.parse_error)
3556                                 break;
3557
3558                         ieee80211_sta_process_chanswitch(sdata,
3559                                                  rx_status->mactime,
3560                                                  rx_status->device_timestamp,
3561                                                  &elems, false);
3562                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3563                         ies_len = skb->len -
3564                                   offsetof(struct ieee80211_mgmt,
3565                                            u.action.u.ext_chan_switch.variable);
3566
3567                         if (ies_len < 0)
3568                                 break;
3569
3570                         ieee802_11_parse_elems(
3571                                 mgmt->u.action.u.ext_chan_switch.variable,
3572                                 ies_len, true, &elems);
3573
3574                         if (elems.parse_error)
3575                                 break;
3576
3577                         /* for the handling code pretend this was also an IE */
3578                         elems.ext_chansw_ie =
3579                                 &mgmt->u.action.u.ext_chan_switch.data;
3580
3581                         ieee80211_sta_process_chanswitch(sdata,
3582                                                  rx_status->mactime,
3583                                                  rx_status->device_timestamp,
3584                                                  &elems, false);
3585                 }
3586                 break;
3587         }
3588         sdata_unlock(sdata);
3589 }
3590
3591 static void ieee80211_sta_timer(unsigned long data)
3592 {
3593         struct ieee80211_sub_if_data *sdata =
3594                 (struct ieee80211_sub_if_data *) data;
3595
3596         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3597 }
3598
3599 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3600                                           u8 *bssid, u8 reason, bool tx)
3601 {
3602         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3603
3604         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3605                                tx, frame_buf);
3606
3607         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3608                               IEEE80211_DEAUTH_FRAME_LEN);
3609 }
3610
3611 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3612 {
3613         struct ieee80211_local *local = sdata->local;
3614         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3615         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3616         u32 tx_flags = 0;
3617
3618         sdata_assert_lock(sdata);
3619
3620         if (WARN_ON_ONCE(!auth_data))
3621                 return -EINVAL;
3622
3623         auth_data->tries++;
3624
3625         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3626                 sdata_info(sdata, "authentication with %pM timed out\n",
3627                            auth_data->bss->bssid);
3628
3629                 /*
3630                  * Most likely AP is not in the range so remove the
3631                  * bss struct for that AP.
3632                  */
3633                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3634
3635                 return -ETIMEDOUT;
3636         }
3637
3638         drv_mgd_prepare_tx(local, sdata);
3639
3640         if (auth_data->bss->proberesp_ies) {
3641                 u16 trans = 1;
3642                 u16 status = 0;
3643
3644                 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3645                            auth_data->bss->bssid, auth_data->tries,
3646                            IEEE80211_AUTH_MAX_TRIES);
3647
3648                 auth_data->expected_transaction = 2;
3649
3650                 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3651                         trans = auth_data->sae_trans;
3652                         status = auth_data->sae_status;
3653                         auth_data->expected_transaction = trans;
3654                 }
3655
3656                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3657                         tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3658                                    IEEE80211_TX_INTFL_MLME_CONN_TX;
3659
3660                 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3661                                     auth_data->data, auth_data->data_len,
3662                                     auth_data->bss->bssid,
3663                                     auth_data->bss->bssid, NULL, 0, 0,
3664                                     tx_flags);
3665         } else {
3666                 const u8 *ssidie;
3667
3668                 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3669                            auth_data->bss->bssid, auth_data->tries,
3670                            IEEE80211_AUTH_MAX_TRIES);
3671
3672                 rcu_read_lock();
3673                 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3674                 if (!ssidie) {
3675                         rcu_read_unlock();
3676                         return -EINVAL;
3677                 }
3678                 /*
3679                  * Direct probe is sent to broadcast address as some APs
3680                  * will not answer to direct packet in unassociated state.
3681                  */
3682                 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
3683                                          ssidie + 2, ssidie[1],
3684                                          NULL, 0, (u32) -1, true, 0,
3685                                          auth_data->bss->channel, false);
3686                 rcu_read_unlock();
3687         }
3688
3689         if (tx_flags == 0) {
3690                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3691                 auth_data->timeout_started = true;
3692                 run_again(sdata, auth_data->timeout);
3693         } else {
3694                 auth_data->timeout =
3695                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3696                 auth_data->timeout_started = true;
3697                 run_again(sdata, auth_data->timeout);
3698         }
3699
3700         return 0;
3701 }
3702
3703 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3704 {
3705         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3706         struct ieee80211_local *local = sdata->local;
3707
3708         sdata_assert_lock(sdata);
3709
3710         assoc_data->tries++;
3711         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3712                 sdata_info(sdata, "association with %pM timed out\n",
3713                            assoc_data->bss->bssid);
3714
3715                 /*
3716                  * Most likely AP is not in the range so remove the
3717                  * bss struct for that AP.
3718                  */
3719                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3720
3721                 return -ETIMEDOUT;
3722         }
3723
3724         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3725                    assoc_data->bss->bssid, assoc_data->tries,
3726                    IEEE80211_ASSOC_MAX_TRIES);
3727         ieee80211_send_assoc(sdata);
3728
3729         if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3730                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3731                 assoc_data->timeout_started = true;
3732                 run_again(sdata, assoc_data->timeout);
3733         } else {
3734                 assoc_data->timeout =
3735                         round_jiffies_up(jiffies +
3736                                          IEEE80211_ASSOC_TIMEOUT_LONG);
3737                 assoc_data->timeout_started = true;
3738                 run_again(sdata, assoc_data->timeout);
3739         }
3740
3741         return 0;
3742 }
3743
3744 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3745                                   __le16 fc, bool acked)
3746 {
3747         struct ieee80211_local *local = sdata->local;
3748
3749         sdata->u.mgd.status_fc = fc;
3750         sdata->u.mgd.status_acked = acked;
3751         sdata->u.mgd.status_received = true;
3752
3753         ieee80211_queue_work(&local->hw, &sdata->work);
3754 }
3755
3756 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3757 {
3758         struct ieee80211_local *local = sdata->local;
3759         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3760
3761         sdata_lock(sdata);
3762
3763         if (ifmgd->status_received) {
3764                 __le16 fc = ifmgd->status_fc;
3765                 bool status_acked = ifmgd->status_acked;
3766
3767                 ifmgd->status_received = false;
3768                 if (ifmgd->auth_data &&
3769                     (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3770                         if (status_acked) {
3771                                 ifmgd->auth_data->timeout =
3772                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3773                                 run_again(sdata, ifmgd->auth_data->timeout);
3774                         } else {
3775                                 ifmgd->auth_data->timeout = jiffies - 1;
3776                         }
3777                         ifmgd->auth_data->timeout_started = true;
3778                 } else if (ifmgd->assoc_data &&
3779                            (ieee80211_is_assoc_req(fc) ||
3780                             ieee80211_is_reassoc_req(fc))) {
3781                         if (status_acked) {
3782                                 ifmgd->assoc_data->timeout =
3783                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3784                                 run_again(sdata, ifmgd->assoc_data->timeout);
3785                         } else {
3786                                 ifmgd->assoc_data->timeout = jiffies - 1;
3787                         }
3788                         ifmgd->assoc_data->timeout_started = true;
3789                 }
3790         }
3791
3792         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3793             time_after(jiffies, ifmgd->auth_data->timeout)) {
3794                 if (ifmgd->auth_data->done) {
3795                         /*
3796                          * ok ... we waited for assoc but userspace didn't,
3797                          * so let's just kill the auth data
3798                          */
3799                         ieee80211_destroy_auth_data(sdata, false);
3800                 } else if (ieee80211_probe_auth(sdata)) {
3801                         u8 bssid[ETH_ALEN];
3802
3803                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3804
3805                         ieee80211_destroy_auth_data(sdata, false);
3806
3807                         cfg80211_auth_timeout(sdata->dev, bssid);
3808                 }
3809         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3810                 run_again(sdata, ifmgd->auth_data->timeout);
3811
3812         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3813             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3814                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3815                     ieee80211_do_assoc(sdata)) {
3816                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3817
3818                         ieee80211_destroy_assoc_data(sdata, false);
3819                         cfg80211_assoc_timeout(sdata->dev, bss);
3820                 }
3821         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3822                 run_again(sdata, ifmgd->assoc_data->timeout);
3823
3824         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3825             ifmgd->associated) {
3826                 u8 bssid[ETH_ALEN];
3827                 int max_tries;
3828
3829                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3830
3831                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3832                         max_tries = max_nullfunc_tries;
3833                 else
3834                         max_tries = max_probe_tries;
3835
3836                 /* ACK received for nullfunc probing frame */
3837                 if (!ifmgd->probe_send_count)
3838                         ieee80211_reset_ap_probe(sdata);
3839                 else if (ifmgd->nullfunc_failed) {
3840                         if (ifmgd->probe_send_count < max_tries) {
3841                                 mlme_dbg(sdata,
3842                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3843                                          bssid, ifmgd->probe_send_count,
3844                                          max_tries);
3845                                 ieee80211_mgd_probe_ap_send(sdata);
3846                         } else {
3847                                 mlme_dbg(sdata,
3848                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3849                                          bssid);
3850                                 ieee80211_sta_connection_lost(sdata, bssid,
3851                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3852                                         false);
3853                         }
3854                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3855                         run_again(sdata, ifmgd->probe_timeout);
3856                 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3857                         mlme_dbg(sdata,
3858                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3859                                  bssid, probe_wait_ms);
3860                         ieee80211_sta_connection_lost(sdata, bssid,
3861                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3862                 } else if (ifmgd->probe_send_count < max_tries) {
3863                         mlme_dbg(sdata,
3864                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3865                                  bssid, probe_wait_ms,
3866                                  ifmgd->probe_send_count, max_tries);
3867                         ieee80211_mgd_probe_ap_send(sdata);
3868                 } else {
3869                         /*
3870                          * We actually lost the connection ... or did we?
3871                          * Let's make sure!
3872                          */
3873                         wiphy_debug(local->hw.wiphy,
3874                                     "%s: No probe response from AP %pM"
3875                                     " after %dms, disconnecting.\n",
3876                                     sdata->name,
3877                                     bssid, probe_wait_ms);
3878
3879                         ieee80211_sta_connection_lost(sdata, bssid,
3880                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3881                 }
3882         }
3883
3884         sdata_unlock(sdata);
3885 }
3886
3887 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3888 {
3889         struct ieee80211_sub_if_data *sdata =
3890                 (struct ieee80211_sub_if_data *) data;
3891         struct ieee80211_local *local = sdata->local;
3892         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3893
3894         if (local->quiescing)
3895                 return;
3896
3897         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3898                 return;
3899
3900         sdata->u.mgd.connection_loss = false;
3901         ieee80211_queue_work(&sdata->local->hw,
3902                              &sdata->u.mgd.beacon_connection_loss_work);
3903 }
3904
3905 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3906 {
3907         struct ieee80211_sub_if_data *sdata =
3908                 (struct ieee80211_sub_if_data *) data;
3909         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3910         struct ieee80211_local *local = sdata->local;
3911
3912         if (local->quiescing)
3913                 return;
3914
3915         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3916                 return;
3917
3918         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3919 }
3920
3921 static void ieee80211_sta_monitor_work(struct work_struct *work)
3922 {
3923         struct ieee80211_sub_if_data *sdata =
3924                 container_of(work, struct ieee80211_sub_if_data,
3925                              u.mgd.monitor_work);
3926
3927         ieee80211_mgd_probe_ap(sdata, false);
3928 }
3929
3930 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3931 {
3932         u32 flags;
3933
3934         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3935                 __ieee80211_stop_poll(sdata);
3936
3937                 /* let's probe the connection once */
3938                 flags = sdata->local->hw.flags;
3939                 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3940                         ieee80211_queue_work(&sdata->local->hw,
3941                                              &sdata->u.mgd.monitor_work);
3942                 /* and do all the other regular work too */
3943                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3944         }
3945 }
3946
3947 #ifdef CONFIG_PM
3948 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3949 {
3950         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3951         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3952
3953         sdata_lock(sdata);
3954
3955         if (ifmgd->auth_data || ifmgd->assoc_data) {
3956                 const u8 *bssid = ifmgd->auth_data ?
3957                                 ifmgd->auth_data->bss->bssid :
3958                                 ifmgd->assoc_data->bss->bssid;
3959
3960                 /*
3961                  * If we are trying to authenticate / associate while suspending,
3962                  * cfg80211 won't know and won't actually abort those attempts,
3963                  * thus we need to do that ourselves.
3964                  */
3965                 ieee80211_send_deauth_disassoc(sdata, bssid,
3966                                                IEEE80211_STYPE_DEAUTH,
3967                                                WLAN_REASON_DEAUTH_LEAVING,
3968                                                false, frame_buf);
3969                 if (ifmgd->assoc_data)
3970                         ieee80211_destroy_assoc_data(sdata, false);
3971                 if (ifmgd->auth_data)
3972                         ieee80211_destroy_auth_data(sdata, false);
3973                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3974                                       IEEE80211_DEAUTH_FRAME_LEN);
3975         }
3976
3977         sdata_unlock(sdata);
3978 }
3979
3980 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3981 {
3982         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3983
3984         sdata_lock(sdata);
3985         if (!ifmgd->associated) {
3986                 sdata_unlock(sdata);
3987                 return;
3988         }
3989
3990         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3991                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3992                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3993                 ieee80211_sta_connection_lost(sdata,
3994                                               ifmgd->associated->bssid,
3995                                               WLAN_REASON_UNSPECIFIED,
3996                                               true);
3997                 sdata_unlock(sdata);
3998                 return;
3999         }
4000         sdata_unlock(sdata);
4001 }
4002 #endif
4003
4004 /* interface setup */
4005 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4006 {
4007         struct ieee80211_if_managed *ifmgd;
4008
4009         ifmgd = &sdata->u.mgd;
4010         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4011         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4012         INIT_WORK(&ifmgd->beacon_connection_loss_work,
4013                   ieee80211_beacon_connection_loss_work);
4014         INIT_WORK(&ifmgd->csa_connection_drop_work,
4015                   ieee80211_csa_connection_drop_work);
4016         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4017         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4018                           ieee80211_tdls_peer_del_work);
4019         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4020                     (unsigned long) sdata);
4021         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4022                     (unsigned long) sdata);
4023         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4024                     (unsigned long) sdata);
4025         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4026                     (unsigned long) sdata);
4027         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4028                           ieee80211_sta_handle_tspec_ac_params_wk);
4029
4030         ifmgd->flags = 0;
4031         ifmgd->powersave = sdata->wdev.ps;
4032         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4033         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4034         ifmgd->p2p_noa_index = -1;
4035
4036         if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4037                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4038         else
4039                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4040
4041         /* Setup TDLS data */
4042         spin_lock_init(&ifmgd->teardown_lock);
4043         ifmgd->teardown_skb = NULL;
4044         ifmgd->orig_teardown_skb = NULL;
4045 }
4046
4047 /* scan finished notification */
4048 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4049 {
4050         struct ieee80211_sub_if_data *sdata;
4051
4052         /* Restart STA timers */
4053         rcu_read_lock();
4054         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4055                 if (ieee80211_sdata_running(sdata))
4056                         ieee80211_restart_sta_timer(sdata);
4057         }
4058         rcu_read_unlock();
4059 }
4060
4061 int ieee80211_max_network_latency(struct notifier_block *nb,
4062                                   unsigned long data, void *dummy)
4063 {
4064         s32 latency_usec = (s32) data;
4065         struct ieee80211_local *local =
4066                 container_of(nb, struct ieee80211_local,
4067                              network_latency_notifier);
4068
4069         mutex_lock(&local->iflist_mtx);
4070         ieee80211_recalc_ps(local, latency_usec);
4071         mutex_unlock(&local->iflist_mtx);
4072
4073         return NOTIFY_OK;
4074 }
4075
4076 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4077                                      struct cfg80211_bss *cbss)
4078 {
4079         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4080         const u8 *ht_cap_ie, *vht_cap_ie;
4081         const struct ieee80211_ht_cap *ht_cap;
4082         const struct ieee80211_vht_cap *vht_cap;
4083         u8 chains = 1;
4084
4085         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4086                 return chains;
4087
4088         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4089         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4090                 ht_cap = (void *)(ht_cap_ie + 2);
4091                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4092                 /*
4093                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4094                  *       "Tx Unequal Modulation Supported" fields.
4095                  */
4096         }
4097
4098         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4099                 return chains;
4100
4101         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4102         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4103                 u8 nss;
4104                 u16 tx_mcs_map;
4105
4106                 vht_cap = (void *)(vht_cap_ie + 2);
4107                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4108                 for (nss = 8; nss > 0; nss--) {
4109                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4110                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
4111                                 break;
4112                 }
4113                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4114                 chains = max(chains, nss);
4115         }
4116
4117         return chains;
4118 }
4119
4120 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4121                                   struct cfg80211_bss *cbss)
4122 {
4123         struct ieee80211_local *local = sdata->local;
4124         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4125         const struct ieee80211_ht_cap *ht_cap = NULL;
4126         const struct ieee80211_ht_operation *ht_oper = NULL;
4127         const struct ieee80211_vht_operation *vht_oper = NULL;
4128         struct ieee80211_supported_band *sband;
4129         struct cfg80211_chan_def chandef;
4130         int ret;
4131
4132         sband = local->hw.wiphy->bands[cbss->channel->band];
4133
4134         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4135                           IEEE80211_STA_DISABLE_80P80MHZ |
4136                           IEEE80211_STA_DISABLE_160MHZ);
4137
4138         rcu_read_lock();
4139
4140         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4141             sband->ht_cap.ht_supported) {
4142                 const u8 *ht_oper_ie, *ht_cap_ie;
4143
4144                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4145                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4146                         ht_oper = (void *)(ht_oper_ie + 2);
4147
4148                 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4149                 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4150                         ht_cap = (void *)(ht_cap_ie + 2);
4151
4152                 if (!ht_cap) {
4153                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4154                         ht_oper = NULL;
4155                 }
4156         }
4157
4158         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4159             sband->vht_cap.vht_supported) {
4160                 const u8 *vht_oper_ie, *vht_cap;
4161
4162                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4163                                                    WLAN_EID_VHT_OPERATION);
4164                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4165                         vht_oper = (void *)(vht_oper_ie + 2);
4166                 if (vht_oper && !ht_oper) {
4167                         vht_oper = NULL;
4168                         sdata_info(sdata,
4169                                    "AP advertised VHT without HT, disabling both\n");
4170                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4171                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4172                 }
4173
4174                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4175                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4176                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4177                         vht_oper = NULL;
4178                 }
4179         }
4180
4181         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4182                                                      cbss->channel,
4183                                                      ht_cap, ht_oper, vht_oper,
4184                                                      &chandef, false);
4185
4186         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4187                                       local->rx_chains);
4188
4189         rcu_read_unlock();
4190
4191         /* will change later if needed */
4192         sdata->smps_mode = IEEE80211_SMPS_OFF;
4193
4194         mutex_lock(&local->mtx);
4195         /*
4196          * If this fails (possibly due to channel context sharing
4197          * on incompatible channels, e.g. 80+80 and 160 sharing the
4198          * same control channel) try to use a smaller bandwidth.
4199          */
4200         ret = ieee80211_vif_use_channel(sdata, &chandef,
4201                                         IEEE80211_CHANCTX_SHARED);
4202
4203         /* don't downgrade for 5 and 10 MHz channels, though. */
4204         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4205             chandef.width == NL80211_CHAN_WIDTH_10)
4206                 goto out;
4207
4208         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4209                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4210                 ret = ieee80211_vif_use_channel(sdata, &chandef,
4211                                                 IEEE80211_CHANCTX_SHARED);
4212         }
4213  out:
4214         mutex_unlock(&local->mtx);
4215         return ret;
4216 }
4217
4218 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4219                                      struct cfg80211_bss *cbss, bool assoc)
4220 {
4221         struct ieee80211_local *local = sdata->local;
4222         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4223         struct ieee80211_bss *bss = (void *)cbss->priv;
4224         struct sta_info *new_sta = NULL;
4225         struct ieee80211_supported_band *sband;
4226         struct ieee80211_sta_ht_cap sta_ht_cap;
4227         bool have_sta = false, is_override = false;
4228         int err;
4229
4230         sband = local->hw.wiphy->bands[cbss->channel->band];
4231
4232         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4233                 return -EINVAL;
4234
4235         if (assoc) {
4236                 rcu_read_lock();
4237                 have_sta = sta_info_get(sdata, cbss->bssid);
4238                 rcu_read_unlock();
4239         }
4240
4241         if (!have_sta) {
4242                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4243                 if (!new_sta)
4244                         return -ENOMEM;
4245         }
4246
4247         memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4248         ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4249
4250         is_override = (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) !=
4251                       (sband->ht_cap.cap &
4252                        IEEE80211_HT_CAP_SUP_WIDTH_20_40);
4253
4254         if (new_sta || is_override) {
4255                 err = ieee80211_prep_channel(sdata, cbss);
4256                 if (err) {
4257                         if (new_sta)
4258                                 sta_info_free(local, new_sta);
4259                         return -EINVAL;
4260                 }
4261         }
4262
4263         if (new_sta) {
4264                 u32 rates = 0, basic_rates = 0;
4265                 bool have_higher_than_11mbit;
4266                 int min_rate = INT_MAX, min_rate_index = -1;
4267                 struct ieee80211_chanctx_conf *chanctx_conf;
4268                 const struct cfg80211_bss_ies *ies;
4269                 int shift = ieee80211_vif_get_shift(&sdata->vif);
4270                 u32 rate_flags;
4271
4272                 rcu_read_lock();
4273                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4274                 if (WARN_ON(!chanctx_conf)) {
4275                         rcu_read_unlock();
4276                         sta_info_free(local, new_sta);
4277                         return -EINVAL;
4278                 }
4279                 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4280                 rcu_read_unlock();
4281
4282                 ieee80211_get_rates(sband, bss->supp_rates,
4283                                     bss->supp_rates_len,
4284                                     &rates, &basic_rates,
4285                                     &have_higher_than_11mbit,
4286                                     &min_rate, &min_rate_index,
4287                                     shift, rate_flags);
4288
4289                 /*
4290                  * This used to be a workaround for basic rates missing
4291                  * in the association response frame. Now that we no
4292                  * longer use the basic rates from there, it probably
4293                  * doesn't happen any more, but keep the workaround so
4294                  * in case some *other* APs are buggy in different ways
4295                  * we can connect -- with a warning.
4296                  */
4297                 if (!basic_rates && min_rate_index >= 0) {
4298                         sdata_info(sdata,
4299                                    "No basic rates, using min rate instead\n");
4300                         basic_rates = BIT(min_rate_index);
4301                 }
4302
4303                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4304                 sdata->vif.bss_conf.basic_rates = basic_rates;
4305
4306                 /* cf. IEEE 802.11 9.2.12 */
4307                 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4308                     have_higher_than_11mbit)
4309                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4310                 else
4311                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4312
4313                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4314
4315                 /* set timing information */
4316                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4317                 rcu_read_lock();
4318                 ies = rcu_dereference(cbss->beacon_ies);
4319                 if (ies) {
4320                         const u8 *tim_ie;
4321
4322                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4323                         sdata->vif.bss_conf.sync_device_ts =
4324                                 bss->device_ts_beacon;
4325                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4326                                                   ies->data, ies->len);
4327                         if (tim_ie && tim_ie[1] >= 2)
4328                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4329                         else
4330                                 sdata->vif.bss_conf.sync_dtim_count = 0;
4331                 } else if (!(local->hw.flags &
4332                                         IEEE80211_HW_TIMING_BEACON_ONLY)) {
4333                         ies = rcu_dereference(cbss->proberesp_ies);
4334                         /* must be non-NULL since beacon IEs were NULL */
4335                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
4336                         sdata->vif.bss_conf.sync_device_ts =
4337                                 bss->device_ts_presp;
4338                         sdata->vif.bss_conf.sync_dtim_count = 0;
4339                 } else {
4340                         sdata->vif.bss_conf.sync_tsf = 0;
4341                         sdata->vif.bss_conf.sync_device_ts = 0;
4342                         sdata->vif.bss_conf.sync_dtim_count = 0;
4343                 }
4344                 rcu_read_unlock();
4345
4346                 /* tell driver about BSSID, basic rates and timing */
4347                 ieee80211_bss_info_change_notify(sdata,
4348                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4349                         BSS_CHANGED_BEACON_INT);
4350
4351                 if (assoc)
4352                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4353
4354                 err = sta_info_insert(new_sta);
4355                 new_sta = NULL;
4356                 if (err) {
4357                         sdata_info(sdata,
4358                                    "failed to insert STA entry for the AP (error %d)\n",
4359                                    err);
4360                         return err;
4361                 }
4362         } else
4363                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4364
4365         return 0;
4366 }
4367
4368 /* config hooks */
4369 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4370                        struct cfg80211_auth_request *req)
4371 {
4372         struct ieee80211_local *local = sdata->local;
4373         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4374         struct ieee80211_mgd_auth_data *auth_data;
4375         u16 auth_alg;
4376         int err;
4377
4378         /* prepare auth data structure */
4379
4380         switch (req->auth_type) {
4381         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4382                 auth_alg = WLAN_AUTH_OPEN;
4383                 break;
4384         case NL80211_AUTHTYPE_SHARED_KEY:
4385                 if (IS_ERR(local->wep_tx_tfm))
4386                         return -EOPNOTSUPP;
4387                 auth_alg = WLAN_AUTH_SHARED_KEY;
4388                 break;
4389         case NL80211_AUTHTYPE_FT:
4390                 auth_alg = WLAN_AUTH_FT;
4391                 break;
4392         case NL80211_AUTHTYPE_NETWORK_EAP:
4393                 auth_alg = WLAN_AUTH_LEAP;
4394                 break;
4395         case NL80211_AUTHTYPE_SAE:
4396                 auth_alg = WLAN_AUTH_SAE;
4397                 break;
4398         default:
4399                 return -EOPNOTSUPP;
4400         }
4401
4402         auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4403                             req->ie_len, GFP_KERNEL);
4404         if (!auth_data)
4405                 return -ENOMEM;
4406
4407         auth_data->bss = req->bss;
4408
4409         if (req->sae_data_len >= 4) {
4410                 __le16 *pos = (__le16 *) req->sae_data;
4411                 auth_data->sae_trans = le16_to_cpu(pos[0]);
4412                 auth_data->sae_status = le16_to_cpu(pos[1]);
4413                 memcpy(auth_data->data, req->sae_data + 4,
4414                        req->sae_data_len - 4);
4415                 auth_data->data_len += req->sae_data_len - 4;
4416         }
4417
4418         if (req->ie && req->ie_len) {
4419                 memcpy(&auth_data->data[auth_data->data_len],
4420                        req->ie, req->ie_len);
4421                 auth_data->data_len += req->ie_len;
4422         }
4423
4424         if (req->key && req->key_len) {
4425                 auth_data->key_len = req->key_len;
4426                 auth_data->key_idx = req->key_idx;
4427                 memcpy(auth_data->key, req->key, req->key_len);
4428         }
4429
4430         auth_data->algorithm = auth_alg;
4431
4432         /* try to authenticate/probe */
4433
4434         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4435             ifmgd->assoc_data) {
4436                 err = -EBUSY;
4437                 goto err_free;
4438         }
4439
4440         if (ifmgd->auth_data)
4441                 ieee80211_destroy_auth_data(sdata, false);
4442
4443         /* prep auth_data so we don't go into idle on disassoc */
4444         ifmgd->auth_data = auth_data;
4445
4446         if (ifmgd->associated) {
4447                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4448
4449                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4450                                        WLAN_REASON_UNSPECIFIED,
4451                                        false, frame_buf);
4452
4453                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4454                                       sizeof(frame_buf));
4455         }
4456
4457         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4458
4459         err = ieee80211_prep_connection(sdata, req->bss, false);
4460         if (err)
4461                 goto err_clear;
4462
4463         err = ieee80211_probe_auth(sdata);
4464         if (err) {
4465                 sta_info_destroy_addr(sdata, req->bss->bssid);
4466                 goto err_clear;
4467         }
4468
4469         /* hold our own reference */
4470         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4471         return 0;
4472
4473  err_clear:
4474         memset(ifmgd->bssid, 0, ETH_ALEN);
4475         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4476         ifmgd->auth_data = NULL;
4477  err_free:
4478         kfree(auth_data);
4479         return err;
4480 }
4481
4482 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4483                                         const u8 *wmm_param, int len)
4484 {
4485         const u8 *pos;
4486         size_t left;
4487
4488         if (len < 8)
4489                 return false;
4490
4491         if (wmm_param[5] != 1 /* version */)
4492                 return false;
4493
4494         pos = wmm_param + 8;
4495         left = len - 8;
4496
4497         for (; left >= 4; left -= 4, pos += 4) {
4498                 u8 aifsn = pos[0] & 0x0f;
4499                 u8 ecwmin = pos[1] & 0x0f;
4500                 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4501                 int aci = (pos[0] >> 5) & 0x03;
4502
4503                 if (aifsn < 2) {
4504                         sdata_info(sdata,
4505                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4506                                    aifsn, aci);
4507                         return false;
4508                 }
4509                 if (ecwmin > ecwmax) {
4510                         sdata_info(sdata,
4511                                    "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4512                                    ecwmin, ecwmax, aci);
4513                         return false;
4514                 }
4515         }
4516
4517         return true;
4518 }
4519
4520 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4521                         struct cfg80211_assoc_request *req)
4522 {
4523         struct ieee80211_local *local = sdata->local;
4524         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4525         struct ieee80211_bss *bss = (void *)req->bss->priv;
4526         struct ieee80211_mgd_assoc_data *assoc_data;
4527         const struct cfg80211_bss_ies *beacon_ies;
4528         struct ieee80211_supported_band *sband;
4529         const u8 *ssidie, *ht_ie, *vht_ie;
4530         int i, err;
4531
4532         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4533         if (!assoc_data)
4534                 return -ENOMEM;
4535
4536         rcu_read_lock();
4537         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4538         if (!ssidie) {
4539                 rcu_read_unlock();
4540                 kfree(assoc_data);
4541                 return -EINVAL;
4542         }
4543         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4544         assoc_data->ssid_len = ssidie[1];
4545         rcu_read_unlock();
4546
4547         if (ifmgd->associated) {
4548                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4549
4550                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4551                                        WLAN_REASON_UNSPECIFIED,
4552                                        false, frame_buf);
4553
4554                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4555                                       sizeof(frame_buf));
4556         }
4557
4558         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4559                 err = -EBUSY;
4560                 goto err_free;
4561         }
4562
4563         if (ifmgd->assoc_data) {
4564                 err = -EBUSY;
4565                 goto err_free;
4566         }
4567
4568         if (ifmgd->auth_data) {
4569                 bool match;
4570
4571                 /* keep sta info, bssid if matching */
4572                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4573                 ieee80211_destroy_auth_data(sdata, match);
4574         }
4575
4576         /* prepare assoc data */
4577
4578         ifmgd->beacon_crc_valid = false;
4579
4580         assoc_data->wmm = bss->wmm_used &&
4581                           (local->hw.queues >= IEEE80211_NUM_ACS);
4582         if (assoc_data->wmm) {
4583                 /* try to check validity of WMM params IE */
4584                 const struct cfg80211_bss_ies *ies;
4585                 const u8 *wp, *start, *end;
4586
4587                 rcu_read_lock();
4588                 ies = rcu_dereference(req->bss->ies);
4589                 start = ies->data;
4590                 end = start + ies->len;
4591
4592                 while (true) {
4593                         wp = cfg80211_find_vendor_ie(
4594                                 WLAN_OUI_MICROSOFT,
4595                                 WLAN_OUI_TYPE_MICROSOFT_WMM,
4596                                 start, end - start);
4597                         if (!wp)
4598                                 break;
4599                         start = wp + wp[1] + 2;
4600                         /* if this IE is too short, try the next */
4601                         if (wp[1] <= 4)
4602                                 continue;
4603                         /* if this IE is WMM params, we found what we wanted */
4604                         if (wp[6] == 1)
4605                                 break;
4606                 }
4607
4608                 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4609                                                         wp[1] - 2)) {
4610                         assoc_data->wmm = false;
4611                         ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4612                 }
4613                 rcu_read_unlock();
4614         }
4615
4616         /*
4617          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4618          * We still associate in non-HT mode (11a/b/g) if any one of these
4619          * ciphers is configured as pairwise.
4620          * We can set this to true for non-11n hardware, that'll be checked
4621          * separately along with the peer capabilities.
4622          */
4623         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4624                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4625                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4626                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4627                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4628                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4629                         netdev_info(sdata->dev,
4630                                     "disabling HT/VHT due to WEP/TKIP use\n");
4631                 }
4632         }
4633
4634         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4635                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4636                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4637         }
4638
4639         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4640                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4641
4642         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4643         sband = local->hw.wiphy->bands[req->bss->channel->band];
4644         if (!sband->ht_cap.ht_supported ||
4645             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4646             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4647                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4648                 if (!bss->wmm_used &&
4649                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4650                         netdev_info(sdata->dev,
4651                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4652         }
4653
4654         /* disable VHT if we don't support it or the AP doesn't use WMM */
4655         if (!sband->vht_cap.vht_supported ||
4656             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4657             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4658                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4659                 if (!bss->wmm_used &&
4660                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4661                         netdev_info(sdata->dev,
4662                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4663         }
4664
4665         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4666         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4667                sizeof(ifmgd->ht_capa_mask));
4668
4669         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4670         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4671                sizeof(ifmgd->vht_capa_mask));
4672
4673         if (req->ie && req->ie_len) {
4674                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4675                 assoc_data->ie_len = req->ie_len;
4676         }
4677
4678         assoc_data->bss = req->bss;
4679
4680         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4681                 if (ifmgd->powersave)
4682                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4683                 else
4684                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4685         } else
4686                 sdata->smps_mode = ifmgd->req_smps;
4687
4688         assoc_data->capability = req->bss->capability;
4689         assoc_data->supp_rates = bss->supp_rates;
4690         assoc_data->supp_rates_len = bss->supp_rates_len;
4691
4692         rcu_read_lock();
4693         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4694         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4695                 assoc_data->ap_ht_param =
4696                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4697         else
4698                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4699         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4700         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4701                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4702                        sizeof(struct ieee80211_vht_cap));
4703         else
4704                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4705         rcu_read_unlock();
4706
4707         if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4708                  (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
4709              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4710                 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4711
4712         if (bss->wmm_used && bss->uapsd_supported &&
4713             (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4714                 assoc_data->uapsd = true;
4715                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4716         } else {
4717                 assoc_data->uapsd = false;
4718                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4719         }
4720
4721         if (req->prev_bssid)
4722                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4723
4724         if (req->use_mfp) {
4725                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4726                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4727         } else {
4728                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4729                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4730         }
4731
4732         if (req->flags & ASSOC_REQ_USE_RRM)
4733                 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4734         else
4735                 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4736
4737         if (req->crypto.control_port)
4738                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4739         else
4740                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4741
4742         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4743         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4744         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4745                                                         sdata->vif.type);
4746
4747         /* kick off associate process */
4748
4749         ifmgd->assoc_data = assoc_data;
4750         ifmgd->dtim_period = 0;
4751         ifmgd->have_beacon = false;
4752
4753         err = ieee80211_prep_connection(sdata, req->bss, true);
4754         if (err)
4755                 goto err_clear;
4756
4757         rcu_read_lock();
4758         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4759
4760         if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4761             !beacon_ies) {
4762                 /*
4763                  * Wait up to one beacon interval ...
4764                  * should this be more if we miss one?
4765                  */
4766                 sdata_info(sdata, "waiting for beacon from %pM\n",
4767                            ifmgd->bssid);
4768                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4769                 assoc_data->timeout_started = true;
4770                 assoc_data->need_beacon = true;
4771         } else if (beacon_ies) {
4772                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4773                                                     beacon_ies->data,
4774                                                     beacon_ies->len);
4775                 u8 dtim_count = 0;
4776
4777                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4778                         const struct ieee80211_tim_ie *tim;
4779                         tim = (void *)(tim_ie + 2);
4780                         ifmgd->dtim_period = tim->dtim_period;
4781                         dtim_count = tim->dtim_count;
4782                 }
4783                 ifmgd->have_beacon = true;
4784                 assoc_data->timeout = jiffies;
4785                 assoc_data->timeout_started = true;
4786
4787                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4788                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4789                         sdata->vif.bss_conf.sync_device_ts =
4790                                 bss->device_ts_beacon;
4791                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4792                 }
4793         } else {
4794                 assoc_data->timeout = jiffies;
4795                 assoc_data->timeout_started = true;
4796         }
4797         rcu_read_unlock();
4798
4799         run_again(sdata, assoc_data->timeout);
4800
4801         if (bss->corrupt_data) {
4802                 char *corrupt_type = "data";
4803                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4804                         if (bss->corrupt_data &
4805                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4806                                 corrupt_type = "beacon and probe response";
4807                         else
4808                                 corrupt_type = "beacon";
4809                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4810                         corrupt_type = "probe response";
4811                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4812                            corrupt_type);
4813         }
4814
4815         return 0;
4816  err_clear:
4817         memset(ifmgd->bssid, 0, ETH_ALEN);
4818         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4819         ifmgd->assoc_data = NULL;
4820  err_free:
4821         kfree(assoc_data);
4822         return err;
4823 }
4824
4825 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4826                          struct cfg80211_deauth_request *req)
4827 {
4828         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4829         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4830         bool tx = !req->local_state_change;
4831
4832         if (ifmgd->auth_data &&
4833             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4834                 sdata_info(sdata,
4835                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4836                            req->bssid, req->reason_code,
4837                            ieee80211_get_reason_code_string(req->reason_code));
4838
4839                 drv_mgd_prepare_tx(sdata->local, sdata);
4840                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4841                                                IEEE80211_STYPE_DEAUTH,
4842                                                req->reason_code, tx,
4843                                                frame_buf);
4844                 ieee80211_destroy_auth_data(sdata, false);
4845                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4846                                       IEEE80211_DEAUTH_FRAME_LEN);
4847
4848                 return 0;
4849         }
4850
4851         if (ifmgd->associated &&
4852             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4853                 sdata_info(sdata,
4854                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4855                            req->bssid, req->reason_code,
4856                            ieee80211_get_reason_code_string(req->reason_code));
4857
4858                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4859                                        req->reason_code, tx, frame_buf);
4860                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4861                                       IEEE80211_DEAUTH_FRAME_LEN);
4862                 return 0;
4863         }
4864
4865         return -ENOTCONN;
4866 }
4867
4868 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4869                            struct cfg80211_disassoc_request *req)
4870 {
4871         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4872         u8 bssid[ETH_ALEN];
4873         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4874
4875         /*
4876          * cfg80211 should catch this ... but it's racy since
4877          * we can receive a disassoc frame, process it, hand it
4878          * to cfg80211 while that's in a locked section already
4879          * trying to tell us that the user wants to disconnect.
4880          */
4881         if (ifmgd->associated != req->bss)
4882                 return -ENOLINK;
4883
4884         sdata_info(sdata,
4885                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
4886                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4887
4888         memcpy(bssid, req->bss->bssid, ETH_ALEN);
4889         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4890                                req->reason_code, !req->local_state_change,
4891                                frame_buf);
4892
4893         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4894                               IEEE80211_DEAUTH_FRAME_LEN);
4895
4896         return 0;
4897 }
4898
4899 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4900 {
4901         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4902
4903         /*
4904          * Make sure some work items will not run after this,
4905          * they will not do anything but might not have been
4906          * cancelled when disconnecting.
4907          */
4908         cancel_work_sync(&ifmgd->monitor_work);
4909         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4910         cancel_work_sync(&ifmgd->request_smps_work);
4911         cancel_work_sync(&ifmgd->csa_connection_drop_work);
4912         cancel_work_sync(&ifmgd->chswitch_work);
4913         cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
4914
4915         sdata_lock(sdata);
4916         if (ifmgd->assoc_data) {
4917                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4918                 ieee80211_destroy_assoc_data(sdata, false);
4919                 cfg80211_assoc_timeout(sdata->dev, bss);
4920         }
4921         if (ifmgd->auth_data)
4922                 ieee80211_destroy_auth_data(sdata, false);
4923         spin_lock_bh(&ifmgd->teardown_lock);
4924         if (ifmgd->teardown_skb) {
4925                 kfree_skb(ifmgd->teardown_skb);
4926                 ifmgd->teardown_skb = NULL;
4927                 ifmgd->orig_teardown_skb = NULL;
4928         }
4929         spin_unlock_bh(&ifmgd->teardown_lock);
4930         del_timer_sync(&ifmgd->timer);
4931         sdata_unlock(sdata);
4932 }
4933
4934 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4935                                enum nl80211_cqm_rssi_threshold_event rssi_event,
4936                                gfp_t gfp)
4937 {
4938         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4939
4940         trace_api_cqm_rssi_notify(sdata, rssi_event);
4941
4942         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4943 }
4944 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
4945
4946 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
4947 {
4948         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4949
4950         trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
4951
4952         cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
4953 }
4954 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);