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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 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15
16 #include <linux/delay.h>
17 #include <linux/if_ether.h>
18 #include <linux/skbuff.h>
19 #include <linux/if_arp.h>
20 #include <linux/etherdevice.h>
21 #include <linux/moduleparam.h>
22 #include <linux/rtnetlink.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 #include "fils_aead.h"
34
35 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
36 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
37 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
38 #define IEEE80211_AUTH_MAX_TRIES 3
39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
41 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
42 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
43 #define IEEE80211_ASSOC_MAX_TRIES 3
44
45 static int max_nullfunc_tries = 2;
46 module_param(max_nullfunc_tries, int, 0644);
47 MODULE_PARM_DESC(max_nullfunc_tries,
48 "Maximum nullfunc tx tries before disconnecting (reason 4).");
49
50 static int max_probe_tries = 5;
51 module_param(max_probe_tries, int, 0644);
52 MODULE_PARM_DESC(max_probe_tries,
53 "Maximum probe tries before disconnecting (reason 4).");
54
55 /*
56 * Beacon loss timeout is calculated as N frames times the
57 * advertised beacon interval. This may need to be somewhat
58 * higher than what hardware might detect to account for
59 * delays in the host processing frames. But since we also
60 * probe on beacon miss before declaring the connection lost
61 * default to what we want.
62 */
63 static int beacon_loss_count = 7;
64 module_param(beacon_loss_count, int, 0644);
65 MODULE_PARM_DESC(beacon_loss_count,
66 "Number of beacon intervals before we decide beacon was lost.");
67
68 /*
69 * Time the connection can be idle before we probe
70 * it to see if we can still talk to the AP.
71 */
72 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
73 /*
74 * Time we wait for a probe response after sending
75 * a probe request because of beacon loss or for
76 * checking the connection still works.
77 */
78 static int probe_wait_ms = 500;
79 module_param(probe_wait_ms, int, 0644);
80 MODULE_PARM_DESC(probe_wait_ms,
81 "Maximum time(ms) to wait for probe response"
82 " before disconnecting (reason 4).");
83
84 /*
85 * How many Beacon frames need to have been used in average signal strength
86 * before starting to indicate signal change events.
87 */
88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
89
90 /*
91 * We can have multiple work items (and connection probing)
92 * scheduling this timer, but we need to take care to only
93 * reschedule it when it should fire _earlier_ than it was
94 * asked for before, or if it's not pending right now. This
95 * function ensures that. Note that it then is required to
96 * run this function for all timeouts after the first one
97 * has happened -- the work that runs from this timer will
98 * do that.
99 */
100 static void run_again(struct ieee80211_sub_if_data *sdata,
101 unsigned long timeout)
102 {
103 sdata_assert_lock(sdata);
104
105 if (!timer_pending(&sdata->u.mgd.timer) ||
106 time_before(timeout, sdata->u.mgd.timer.expires))
107 mod_timer(&sdata->u.mgd.timer, timeout);
108 }
109
110 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
111 {
112 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
113 return;
114
115 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
116 return;
117
118 mod_timer(&sdata->u.mgd.bcn_mon_timer,
119 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
120 }
121
122 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
123 {
124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
125
126 if (unlikely(!ifmgd->associated))
127 return;
128
129 if (ifmgd->probe_send_count)
130 ifmgd->probe_send_count = 0;
131
132 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
133 return;
134
135 mod_timer(&ifmgd->conn_mon_timer,
136 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
137 }
138
139 static int ecw2cw(int ecw)
140 {
141 return (1 << ecw) - 1;
142 }
143
144 static u32
145 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
146 struct ieee80211_supported_band *sband,
147 struct ieee80211_channel *channel,
148 const struct ieee80211_ht_cap *ht_cap,
149 const struct ieee80211_ht_operation *ht_oper,
150 const struct ieee80211_vht_operation *vht_oper,
151 struct cfg80211_chan_def *chandef, bool tracking)
152 {
153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
154 struct cfg80211_chan_def vht_chandef;
155 struct ieee80211_sta_ht_cap sta_ht_cap;
156 u32 ht_cfreq, ret;
157
158 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
159 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
160
161 chandef->chan = channel;
162 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
163 chandef->center_freq1 = channel->center_freq;
164 chandef->center_freq2 = 0;
165
166 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
167 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
168 goto out;
169 }
170
171 chandef->width = NL80211_CHAN_WIDTH_20;
172
173 if (!(ht_cap->cap_info &
174 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
175 ret = IEEE80211_STA_DISABLE_40MHZ;
176 vht_chandef = *chandef;
177 goto out;
178 }
179
180 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
181 channel->band);
182 /* check that channel matches the right operating channel */
183 if (!tracking && channel->center_freq != ht_cfreq) {
184 /*
185 * It's possible that some APs are confused here;
186 * Netgear WNDR3700 sometimes reports 4 higher than
187 * the actual channel in association responses, but
188 * since we look at probe response/beacon data here
189 * it should be OK.
190 */
191 sdata_info(sdata,
192 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
193 channel->center_freq, ht_cfreq,
194 ht_oper->primary_chan, channel->band);
195 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
196 goto out;
197 }
198
199 /* check 40 MHz support, if we have it */
200 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
201 ieee80211_chandef_ht_oper(ht_oper, chandef);
202 } else {
203 /* 40 MHz (and 80 MHz) must be supported for VHT */
204 ret = IEEE80211_STA_DISABLE_VHT;
205 /* also mark 40 MHz disabled */
206 ret |= IEEE80211_STA_DISABLE_40MHZ;
207 goto out;
208 }
209
210 if (!vht_oper || !sband->vht_cap.vht_supported) {
211 ret = IEEE80211_STA_DISABLE_VHT;
212 goto out;
213 }
214
215 vht_chandef = *chandef;
216 if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) {
217 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
218 sdata_info(sdata,
219 "AP VHT information is invalid, disable VHT\n");
220 ret = IEEE80211_STA_DISABLE_VHT;
221 goto out;
222 }
223
224 if (!cfg80211_chandef_valid(&vht_chandef)) {
225 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
226 sdata_info(sdata,
227 "AP VHT information is invalid, disable VHT\n");
228 ret = IEEE80211_STA_DISABLE_VHT;
229 goto out;
230 }
231
232 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
233 ret = 0;
234 goto out;
235 }
236
237 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
238 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
239 sdata_info(sdata,
240 "AP VHT information doesn't match HT, disable VHT\n");
241 ret = IEEE80211_STA_DISABLE_VHT;
242 goto out;
243 }
244
245 *chandef = vht_chandef;
246
247 ret = 0;
248
249 out:
250 /*
251 * When tracking the current AP, don't do any further checks if the
252 * new chandef is identical to the one we're currently using for the
253 * connection. This keeps us from playing ping-pong with regulatory,
254 * without it the following can happen (for example):
255 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
256 * - AP advertises regdom US
257 * - CRDA loads regdom US with 80 MHz prohibited (old database)
258 * - the code below detects an unsupported channel, downgrades, and
259 * we disconnect from the AP in the caller
260 * - disconnect causes CRDA to reload world regdomain and the game
261 * starts anew.
262 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
263 *
264 * It seems possible that there are still scenarios with CSA or real
265 * bandwidth changes where a this could happen, but those cases are
266 * less common and wouldn't completely prevent using the AP.
267 */
268 if (tracking &&
269 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
270 return ret;
271
272 /* don't print the message below for VHT mismatch if VHT is disabled */
273 if (ret & IEEE80211_STA_DISABLE_VHT)
274 vht_chandef = *chandef;
275
276 /*
277 * Ignore the DISABLED flag when we're already connected and only
278 * tracking the APs beacon for bandwidth changes - otherwise we
279 * might get disconnected here if we connect to an AP, update our
280 * regulatory information based on the AP's country IE and the
281 * information we have is wrong/outdated and disables the channel
282 * that we're actually using for the connection to the AP.
283 */
284 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
285 tracking ? 0 :
286 IEEE80211_CHAN_DISABLED)) {
287 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
288 ret = IEEE80211_STA_DISABLE_HT |
289 IEEE80211_STA_DISABLE_VHT;
290 break;
291 }
292
293 ret |= ieee80211_chandef_downgrade(chandef);
294 }
295
296 if (chandef->width != vht_chandef.width && !tracking)
297 sdata_info(sdata,
298 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
299
300 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
301 return ret;
302 }
303
304 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
305 struct sta_info *sta,
306 const struct ieee80211_ht_cap *ht_cap,
307 const struct ieee80211_ht_operation *ht_oper,
308 const struct ieee80211_vht_operation *vht_oper,
309 const u8 *bssid, u32 *changed)
310 {
311 struct ieee80211_local *local = sdata->local;
312 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
313 struct ieee80211_supported_band *sband;
314 struct ieee80211_channel *chan;
315 struct cfg80211_chan_def chandef;
316 u16 ht_opmode;
317 u32 flags;
318 enum ieee80211_sta_rx_bandwidth new_sta_bw;
319 int ret;
320
321 /* if HT was/is disabled, don't track any bandwidth changes */
322 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
323 return 0;
324
325 /* don't check VHT if we associated as non-VHT station */
326 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
327 vht_oper = NULL;
328
329 if (WARN_ON_ONCE(!sta))
330 return -EINVAL;
331
332 /*
333 * if bss configuration changed store the new one -
334 * this may be applicable even if channel is identical
335 */
336 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
337 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
338 *changed |= BSS_CHANGED_HT;
339 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
340 }
341
342 chan = sdata->vif.bss_conf.chandef.chan;
343 sband = local->hw.wiphy->bands[chan->band];
344
345 /* calculate new channel (type) based on HT/VHT operation IEs */
346 flags = ieee80211_determine_chantype(sdata, sband, chan,
347 ht_cap, ht_oper, vht_oper,
348 &chandef, true);
349
350 /*
351 * Downgrade the new channel if we associated with restricted
352 * capabilities. For example, if we associated as a 20 MHz STA
353 * to a 40 MHz AP (due to regulatory, capabilities or config
354 * reasons) then switching to a 40 MHz channel now won't do us
355 * any good -- we couldn't use it with the AP.
356 */
357 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
358 chandef.width == NL80211_CHAN_WIDTH_80P80)
359 flags |= ieee80211_chandef_downgrade(&chandef);
360 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
361 chandef.width == NL80211_CHAN_WIDTH_160)
362 flags |= ieee80211_chandef_downgrade(&chandef);
363 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
364 chandef.width > NL80211_CHAN_WIDTH_20)
365 flags |= ieee80211_chandef_downgrade(&chandef);
366
367 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
368 return 0;
369
370 sdata_info(sdata,
371 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
372 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
373 chandef.center_freq1, chandef.center_freq2);
374
375 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
376 IEEE80211_STA_DISABLE_VHT |
377 IEEE80211_STA_DISABLE_40MHZ |
378 IEEE80211_STA_DISABLE_80P80MHZ |
379 IEEE80211_STA_DISABLE_160MHZ)) ||
380 !cfg80211_chandef_valid(&chandef)) {
381 sdata_info(sdata,
382 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
383 ifmgd->bssid);
384 return -EINVAL;
385 }
386
387 switch (chandef.width) {
388 case NL80211_CHAN_WIDTH_20_NOHT:
389 case NL80211_CHAN_WIDTH_20:
390 new_sta_bw = IEEE80211_STA_RX_BW_20;
391 break;
392 case NL80211_CHAN_WIDTH_40:
393 new_sta_bw = IEEE80211_STA_RX_BW_40;
394 break;
395 case NL80211_CHAN_WIDTH_80:
396 new_sta_bw = IEEE80211_STA_RX_BW_80;
397 break;
398 case NL80211_CHAN_WIDTH_80P80:
399 case NL80211_CHAN_WIDTH_160:
400 new_sta_bw = IEEE80211_STA_RX_BW_160;
401 break;
402 default:
403 return -EINVAL;
404 }
405
406 if (new_sta_bw > sta->cur_max_bandwidth)
407 new_sta_bw = sta->cur_max_bandwidth;
408
409 if (new_sta_bw < sta->sta.bandwidth) {
410 sta->sta.bandwidth = new_sta_bw;
411 rate_control_rate_update(local, sband, sta,
412 IEEE80211_RC_BW_CHANGED);
413 }
414
415 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
416 if (ret) {
417 sdata_info(sdata,
418 "AP %pM changed bandwidth to incompatible one - disconnect\n",
419 ifmgd->bssid);
420 return ret;
421 }
422
423 if (new_sta_bw > sta->sta.bandwidth) {
424 sta->sta.bandwidth = new_sta_bw;
425 rate_control_rate_update(local, sband, sta,
426 IEEE80211_RC_BW_CHANGED);
427 }
428
429 return 0;
430 }
431
432 /* frame sending functions */
433
434 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
435 struct sk_buff *skb, u8 ap_ht_param,
436 struct ieee80211_supported_band *sband,
437 struct ieee80211_channel *channel,
438 enum ieee80211_smps_mode smps)
439 {
440 u8 *pos;
441 u32 flags = channel->flags;
442 u16 cap;
443 struct ieee80211_sta_ht_cap ht_cap;
444
445 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
446
447 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
448 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
449
450 /* determine capability flags */
451 cap = ht_cap.cap;
452
453 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
454 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
455 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
456 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
457 cap &= ~IEEE80211_HT_CAP_SGI_40;
458 }
459 break;
460 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
461 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
462 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
463 cap &= ~IEEE80211_HT_CAP_SGI_40;
464 }
465 break;
466 }
467
468 /*
469 * If 40 MHz was disabled associate as though we weren't
470 * capable of 40 MHz -- some broken APs will never fall
471 * back to trying to transmit in 20 MHz.
472 */
473 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
474 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
475 cap &= ~IEEE80211_HT_CAP_SGI_40;
476 }
477
478 /* set SM PS mode properly */
479 cap &= ~IEEE80211_HT_CAP_SM_PS;
480 switch (smps) {
481 case IEEE80211_SMPS_AUTOMATIC:
482 case IEEE80211_SMPS_NUM_MODES:
483 WARN_ON(1);
484 case IEEE80211_SMPS_OFF:
485 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
486 IEEE80211_HT_CAP_SM_PS_SHIFT;
487 break;
488 case IEEE80211_SMPS_STATIC:
489 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
490 IEEE80211_HT_CAP_SM_PS_SHIFT;
491 break;
492 case IEEE80211_SMPS_DYNAMIC:
493 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
494 IEEE80211_HT_CAP_SM_PS_SHIFT;
495 break;
496 }
497
498 /* reserve and fill IE */
499 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
500 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
501 }
502
503 /* This function determines vht capability flags for the association
504 * and builds the IE.
505 * Note - the function may set the owner of the MU-MIMO capability
506 */
507 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
508 struct sk_buff *skb,
509 struct ieee80211_supported_band *sband,
510 struct ieee80211_vht_cap *ap_vht_cap)
511 {
512 struct ieee80211_local *local = sdata->local;
513 u8 *pos;
514 u32 cap;
515 struct ieee80211_sta_vht_cap vht_cap;
516 u32 mask, ap_bf_sts, our_bf_sts;
517
518 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
519
520 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
521 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
522
523 /* determine capability flags */
524 cap = vht_cap.cap;
525
526 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
527 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
528
529 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
530 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
531 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
532 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
533 }
534
535 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
536 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
537 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
538 }
539
540 /*
541 * Some APs apparently get confused if our capabilities are better
542 * than theirs, so restrict what we advertise in the assoc request.
543 */
544 if (!(ap_vht_cap->vht_cap_info &
545 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
546 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
547 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
548 else if (!(ap_vht_cap->vht_cap_info &
549 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
550 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
551
552 /*
553 * If some other vif is using the MU-MIMO capablity we cannot associate
554 * using MU-MIMO - this will lead to contradictions in the group-id
555 * mechanism.
556 * Ownership is defined since association request, in order to avoid
557 * simultaneous associations with MU-MIMO.
558 */
559 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
560 bool disable_mu_mimo = false;
561 struct ieee80211_sub_if_data *other;
562
563 list_for_each_entry_rcu(other, &local->interfaces, list) {
564 if (other->vif.mu_mimo_owner) {
565 disable_mu_mimo = true;
566 break;
567 }
568 }
569 if (disable_mu_mimo)
570 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
571 else
572 sdata->vif.mu_mimo_owner = true;
573 }
574
575 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
576
577 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
578 our_bf_sts = cap & mask;
579
580 if (ap_bf_sts < our_bf_sts) {
581 cap &= ~mask;
582 cap |= ap_bf_sts;
583 }
584
585 /* reserve and fill IE */
586 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
587 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
588 }
589
590 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
591 {
592 struct ieee80211_local *local = sdata->local;
593 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
594 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
595 struct sk_buff *skb;
596 struct ieee80211_mgmt *mgmt;
597 u8 *pos, qos_info;
598 size_t offset = 0, noffset;
599 int i, count, rates_len, supp_rates_len, shift;
600 u16 capab;
601 struct ieee80211_supported_band *sband;
602 struct ieee80211_chanctx_conf *chanctx_conf;
603 struct ieee80211_channel *chan;
604 u32 rate_flags, rates = 0;
605
606 sdata_assert_lock(sdata);
607
608 rcu_read_lock();
609 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
610 if (WARN_ON(!chanctx_conf)) {
611 rcu_read_unlock();
612 return;
613 }
614 chan = chanctx_conf->def.chan;
615 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
616 rcu_read_unlock();
617 sband = local->hw.wiphy->bands[chan->band];
618 shift = ieee80211_vif_get_shift(&sdata->vif);
619
620 if (assoc_data->supp_rates_len) {
621 /*
622 * Get all rates supported by the device and the AP as
623 * some APs don't like getting a superset of their rates
624 * in the association request (e.g. D-Link DAP 1353 in
625 * b-only mode)...
626 */
627 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
628 assoc_data->supp_rates,
629 assoc_data->supp_rates_len,
630 &rates);
631 } else {
632 /*
633 * In case AP not provide any supported rates information
634 * before association, we send information element(s) with
635 * all rates that we support.
636 */
637 rates_len = 0;
638 for (i = 0; i < sband->n_bitrates; i++) {
639 if ((rate_flags & sband->bitrates[i].flags)
640 != rate_flags)
641 continue;
642 rates |= BIT(i);
643 rates_len++;
644 }
645 }
646
647 skb = alloc_skb(local->hw.extra_tx_headroom +
648 sizeof(*mgmt) + /* bit too much but doesn't matter */
649 2 + assoc_data->ssid_len + /* SSID */
650 4 + rates_len + /* (extended) rates */
651 4 + /* power capability */
652 2 + 2 * sband->n_channels + /* supported channels */
653 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
654 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
655 assoc_data->ie_len + /* extra IEs */
656 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
657 9, /* WMM */
658 GFP_KERNEL);
659 if (!skb)
660 return;
661
662 skb_reserve(skb, local->hw.extra_tx_headroom);
663
664 capab = WLAN_CAPABILITY_ESS;
665
666 if (sband->band == NL80211_BAND_2GHZ) {
667 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
668 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
669 }
670
671 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
672 capab |= WLAN_CAPABILITY_PRIVACY;
673
674 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
675 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
676 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
677
678 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
679 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
680
681 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
682 memset(mgmt, 0, 24);
683 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
684 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
685 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
686
687 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
688 skb_put(skb, 10);
689 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
690 IEEE80211_STYPE_REASSOC_REQ);
691 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
692 mgmt->u.reassoc_req.listen_interval =
693 cpu_to_le16(local->hw.conf.listen_interval);
694 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
695 ETH_ALEN);
696 } else {
697 skb_put(skb, 4);
698 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
699 IEEE80211_STYPE_ASSOC_REQ);
700 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
701 mgmt->u.assoc_req.listen_interval =
702 cpu_to_le16(local->hw.conf.listen_interval);
703 }
704
705 /* SSID */
706 pos = skb_put(skb, 2 + assoc_data->ssid_len);
707 *pos++ = WLAN_EID_SSID;
708 *pos++ = assoc_data->ssid_len;
709 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
710
711 /* add all rates which were marked to be used above */
712 supp_rates_len = rates_len;
713 if (supp_rates_len > 8)
714 supp_rates_len = 8;
715
716 pos = skb_put(skb, supp_rates_len + 2);
717 *pos++ = WLAN_EID_SUPP_RATES;
718 *pos++ = supp_rates_len;
719
720 count = 0;
721 for (i = 0; i < sband->n_bitrates; i++) {
722 if (BIT(i) & rates) {
723 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
724 5 * (1 << shift));
725 *pos++ = (u8) rate;
726 if (++count == 8)
727 break;
728 }
729 }
730
731 if (rates_len > count) {
732 pos = skb_put(skb, rates_len - count + 2);
733 *pos++ = WLAN_EID_EXT_SUPP_RATES;
734 *pos++ = rates_len - count;
735
736 for (i++; i < sband->n_bitrates; i++) {
737 if (BIT(i) & rates) {
738 int rate;
739 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
740 5 * (1 << shift));
741 *pos++ = (u8) rate;
742 }
743 }
744 }
745
746 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
747 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
748 pos = skb_put(skb, 4);
749 *pos++ = WLAN_EID_PWR_CAPABILITY;
750 *pos++ = 2;
751 *pos++ = 0; /* min tx power */
752 /* max tx power */
753 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
754 }
755
756 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
757 /* TODO: get this in reg domain format */
758 pos = skb_put(skb, 2 * sband->n_channels + 2);
759 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
760 *pos++ = 2 * sband->n_channels;
761 for (i = 0; i < sband->n_channels; i++) {
762 *pos++ = ieee80211_frequency_to_channel(
763 sband->channels[i].center_freq);
764 *pos++ = 1; /* one channel in the subband*/
765 }
766 }
767
768 /* if present, add any custom IEs that go before HT */
769 if (assoc_data->ie_len) {
770 static const u8 before_ht[] = {
771 WLAN_EID_SSID,
772 WLAN_EID_SUPP_RATES,
773 WLAN_EID_EXT_SUPP_RATES,
774 WLAN_EID_PWR_CAPABILITY,
775 WLAN_EID_SUPPORTED_CHANNELS,
776 WLAN_EID_RSN,
777 WLAN_EID_QOS_CAPA,
778 WLAN_EID_RRM_ENABLED_CAPABILITIES,
779 WLAN_EID_MOBILITY_DOMAIN,
780 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
781 WLAN_EID_RIC_DATA, /* reassoc only */
782 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
783 };
784 static const u8 after_ric[] = {
785 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
786 WLAN_EID_HT_CAPABILITY,
787 WLAN_EID_BSS_COEX_2040,
788 WLAN_EID_EXT_CAPABILITY,
789 WLAN_EID_QOS_TRAFFIC_CAPA,
790 WLAN_EID_TIM_BCAST_REQ,
791 WLAN_EID_INTERWORKING,
792 /* 60GHz doesn't happen right now */
793 WLAN_EID_VHT_CAPABILITY,
794 WLAN_EID_OPMODE_NOTIF,
795 };
796
797 noffset = ieee80211_ie_split_ric(assoc_data->ie,
798 assoc_data->ie_len,
799 before_ht,
800 ARRAY_SIZE(before_ht),
801 after_ric,
802 ARRAY_SIZE(after_ric),
803 offset);
804 pos = skb_put(skb, noffset - offset);
805 memcpy(pos, assoc_data->ie + offset, noffset - offset);
806 offset = noffset;
807 }
808
809 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
810 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
811 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
812
813 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
814 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
815 sband, chan, sdata->smps_mode);
816
817 /* if present, add any custom IEs that go before VHT */
818 if (assoc_data->ie_len) {
819 static const u8 before_vht[] = {
820 WLAN_EID_SSID,
821 WLAN_EID_SUPP_RATES,
822 WLAN_EID_EXT_SUPP_RATES,
823 WLAN_EID_PWR_CAPABILITY,
824 WLAN_EID_SUPPORTED_CHANNELS,
825 WLAN_EID_RSN,
826 WLAN_EID_QOS_CAPA,
827 WLAN_EID_RRM_ENABLED_CAPABILITIES,
828 WLAN_EID_MOBILITY_DOMAIN,
829 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
830 WLAN_EID_HT_CAPABILITY,
831 WLAN_EID_BSS_COEX_2040,
832 WLAN_EID_EXT_CAPABILITY,
833 WLAN_EID_QOS_TRAFFIC_CAPA,
834 WLAN_EID_TIM_BCAST_REQ,
835 WLAN_EID_INTERWORKING,
836 };
837
838 /* RIC already taken above, so no need to handle here anymore */
839 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
840 before_vht, ARRAY_SIZE(before_vht),
841 offset);
842 pos = skb_put(skb, noffset - offset);
843 memcpy(pos, assoc_data->ie + offset, noffset - offset);
844 offset = noffset;
845 }
846
847 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
848 ieee80211_add_vht_ie(sdata, skb, sband,
849 &assoc_data->ap_vht_cap);
850
851 /* if present, add any custom non-vendor IEs that go after HT */
852 if (assoc_data->ie_len) {
853 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
854 assoc_data->ie_len,
855 offset);
856 pos = skb_put(skb, noffset - offset);
857 memcpy(pos, assoc_data->ie + offset, noffset - offset);
858 offset = noffset;
859 }
860
861 if (assoc_data->wmm) {
862 if (assoc_data->uapsd) {
863 qos_info = ifmgd->uapsd_queues;
864 qos_info |= (ifmgd->uapsd_max_sp_len <<
865 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
866 } else {
867 qos_info = 0;
868 }
869
870 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
871 }
872
873 /* add any remaining custom (i.e. vendor specific here) IEs */
874 if (assoc_data->ie_len) {
875 noffset = assoc_data->ie_len;
876 pos = skb_put(skb, noffset - offset);
877 memcpy(pos, assoc_data->ie + offset, noffset - offset);
878 }
879
880 if (assoc_data->fils_kek_len &&
881 fils_encrypt_assoc_req(skb, assoc_data) < 0) {
882 dev_kfree_skb(skb);
883 return;
884 }
885
886 drv_mgd_prepare_tx(local, sdata);
887
888 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
889 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
890 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
891 IEEE80211_TX_INTFL_MLME_CONN_TX;
892 ieee80211_tx_skb(sdata, skb);
893 }
894
895 void ieee80211_send_pspoll(struct ieee80211_local *local,
896 struct ieee80211_sub_if_data *sdata)
897 {
898 struct ieee80211_pspoll *pspoll;
899 struct sk_buff *skb;
900
901 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
902 if (!skb)
903 return;
904
905 pspoll = (struct ieee80211_pspoll *) skb->data;
906 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
907
908 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
909 ieee80211_tx_skb(sdata, skb);
910 }
911
912 void ieee80211_send_nullfunc(struct ieee80211_local *local,
913 struct ieee80211_sub_if_data *sdata,
914 bool powersave)
915 {
916 struct sk_buff *skb;
917 struct ieee80211_hdr_3addr *nullfunc;
918 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
919
920 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
921 if (!skb)
922 return;
923
924 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
925 if (powersave)
926 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
927
928 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
929 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
930
931 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
932 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
933
934 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
935 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
936
937 ieee80211_tx_skb(sdata, skb);
938 }
939
940 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
941 struct ieee80211_sub_if_data *sdata)
942 {
943 struct sk_buff *skb;
944 struct ieee80211_hdr *nullfunc;
945 __le16 fc;
946
947 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
948 return;
949
950 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
951 if (!skb)
952 return;
953
954 skb_reserve(skb, local->hw.extra_tx_headroom);
955
956 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
957 memset(nullfunc, 0, 30);
958 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
959 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
960 nullfunc->frame_control = fc;
961 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
962 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
963 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
964 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
965
966 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
967 ieee80211_tx_skb(sdata, skb);
968 }
969
970 /* spectrum management related things */
971 static void ieee80211_chswitch_work(struct work_struct *work)
972 {
973 struct ieee80211_sub_if_data *sdata =
974 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
975 struct ieee80211_local *local = sdata->local;
976 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
977 int ret;
978
979 if (!ieee80211_sdata_running(sdata))
980 return;
981
982 sdata_lock(sdata);
983 mutex_lock(&local->mtx);
984 mutex_lock(&local->chanctx_mtx);
985
986 if (!ifmgd->associated)
987 goto out;
988
989 if (!sdata->vif.csa_active)
990 goto out;
991
992 /*
993 * using reservation isn't immediate as it may be deferred until later
994 * with multi-vif. once reservation is complete it will re-schedule the
995 * work with no reserved_chanctx so verify chandef to check if it
996 * completed successfully
997 */
998
999 if (sdata->reserved_chanctx) {
1000 /*
1001 * with multi-vif csa driver may call ieee80211_csa_finish()
1002 * many times while waiting for other interfaces to use their
1003 * reservations
1004 */
1005 if (sdata->reserved_ready)
1006 goto out;
1007
1008 ret = ieee80211_vif_use_reserved_context(sdata);
1009 if (ret) {
1010 sdata_info(sdata,
1011 "failed to use reserved channel context, disconnecting (err=%d)\n",
1012 ret);
1013 ieee80211_queue_work(&sdata->local->hw,
1014 &ifmgd->csa_connection_drop_work);
1015 goto out;
1016 }
1017
1018 goto out;
1019 }
1020
1021 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1022 &sdata->csa_chandef)) {
1023 sdata_info(sdata,
1024 "failed to finalize channel switch, disconnecting\n");
1025 ieee80211_queue_work(&sdata->local->hw,
1026 &ifmgd->csa_connection_drop_work);
1027 goto out;
1028 }
1029
1030 /* XXX: shouldn't really modify cfg80211-owned data! */
1031 ifmgd->associated->channel = sdata->csa_chandef.chan;
1032
1033 ifmgd->csa_waiting_bcn = true;
1034
1035 ieee80211_sta_reset_beacon_monitor(sdata);
1036 ieee80211_sta_reset_conn_monitor(sdata);
1037
1038 out:
1039 mutex_unlock(&local->chanctx_mtx);
1040 mutex_unlock(&local->mtx);
1041 sdata_unlock(sdata);
1042 }
1043
1044 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1045 {
1046 struct ieee80211_local *local = sdata->local;
1047 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1048 int ret;
1049
1050 sdata_assert_lock(sdata);
1051
1052 WARN_ON(!sdata->vif.csa_active);
1053
1054 if (sdata->csa_block_tx) {
1055 ieee80211_wake_vif_queues(local, sdata,
1056 IEEE80211_QUEUE_STOP_REASON_CSA);
1057 sdata->csa_block_tx = false;
1058 }
1059
1060 sdata->vif.csa_active = false;
1061 ifmgd->csa_waiting_bcn = false;
1062
1063 ret = drv_post_channel_switch(sdata);
1064 if (ret) {
1065 sdata_info(sdata,
1066 "driver post channel switch failed, disconnecting\n");
1067 ieee80211_queue_work(&local->hw,
1068 &ifmgd->csa_connection_drop_work);
1069 return;
1070 }
1071
1072 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1073 }
1074
1075 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1076 {
1077 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1078 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1079
1080 trace_api_chswitch_done(sdata, success);
1081 if (!success) {
1082 sdata_info(sdata,
1083 "driver channel switch failed, disconnecting\n");
1084 ieee80211_queue_work(&sdata->local->hw,
1085 &ifmgd->csa_connection_drop_work);
1086 } else {
1087 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1088 }
1089 }
1090 EXPORT_SYMBOL(ieee80211_chswitch_done);
1091
1092 static void ieee80211_chswitch_timer(unsigned long data)
1093 {
1094 struct ieee80211_sub_if_data *sdata =
1095 (struct ieee80211_sub_if_data *) data;
1096
1097 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1098 }
1099
1100 static void
1101 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1102 u64 timestamp, u32 device_timestamp,
1103 struct ieee802_11_elems *elems,
1104 bool beacon)
1105 {
1106 struct ieee80211_local *local = sdata->local;
1107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1108 struct cfg80211_bss *cbss = ifmgd->associated;
1109 struct ieee80211_chanctx_conf *conf;
1110 struct ieee80211_chanctx *chanctx;
1111 enum nl80211_band current_band;
1112 struct ieee80211_csa_ie csa_ie;
1113 struct ieee80211_channel_switch ch_switch;
1114 int res;
1115
1116 sdata_assert_lock(sdata);
1117
1118 if (!cbss)
1119 return;
1120
1121 if (local->scanning)
1122 return;
1123
1124 /* disregard subsequent announcements if we are already processing */
1125 if (sdata->vif.csa_active)
1126 return;
1127
1128 current_band = cbss->channel->band;
1129 memset(&csa_ie, 0, sizeof(csa_ie));
1130 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1131 ifmgd->flags,
1132 ifmgd->associated->bssid, &csa_ie);
1133 if (res < 0)
1134 ieee80211_queue_work(&local->hw,
1135 &ifmgd->csa_connection_drop_work);
1136 if (res)
1137 return;
1138
1139 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1140 IEEE80211_CHAN_DISABLED)) {
1141 sdata_info(sdata,
1142 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1143 ifmgd->associated->bssid,
1144 csa_ie.chandef.chan->center_freq,
1145 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1146 csa_ie.chandef.center_freq2);
1147 ieee80211_queue_work(&local->hw,
1148 &ifmgd->csa_connection_drop_work);
1149 return;
1150 }
1151
1152 if (cfg80211_chandef_identical(&csa_ie.chandef,
1153 &sdata->vif.bss_conf.chandef)) {
1154 if (ifmgd->csa_ignored_same_chan)
1155 return;
1156 sdata_info(sdata,
1157 "AP %pM tries to chanswitch to same channel, ignore\n",
1158 ifmgd->associated->bssid);
1159 ifmgd->csa_ignored_same_chan = true;
1160 return;
1161 }
1162
1163 /*
1164 * Drop all TDLS peers - either we disconnect or move to a different
1165 * channel from this point on. There's no telling what our peer will do.
1166 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1167 * have an incompatible wider chandef.
1168 */
1169 ieee80211_teardown_tdls_peers(sdata);
1170
1171 mutex_lock(&local->mtx);
1172 mutex_lock(&local->chanctx_mtx);
1173 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1174 lockdep_is_held(&local->chanctx_mtx));
1175 if (!conf) {
1176 sdata_info(sdata,
1177 "no channel context assigned to vif?, disconnecting\n");
1178 goto drop_connection;
1179 }
1180
1181 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1182
1183 if (local->use_chanctx &&
1184 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1185 sdata_info(sdata,
1186 "driver doesn't support chan-switch with channel contexts\n");
1187 goto drop_connection;
1188 }
1189
1190 ch_switch.timestamp = timestamp;
1191 ch_switch.device_timestamp = device_timestamp;
1192 ch_switch.block_tx = csa_ie.mode;
1193 ch_switch.chandef = csa_ie.chandef;
1194 ch_switch.count = csa_ie.count;
1195
1196 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1197 sdata_info(sdata,
1198 "preparing for channel switch failed, disconnecting\n");
1199 goto drop_connection;
1200 }
1201
1202 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1203 chanctx->mode, false);
1204 if (res) {
1205 sdata_info(sdata,
1206 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1207 res);
1208 goto drop_connection;
1209 }
1210 mutex_unlock(&local->chanctx_mtx);
1211
1212 sdata->vif.csa_active = true;
1213 sdata->csa_chandef = csa_ie.chandef;
1214 sdata->csa_block_tx = csa_ie.mode;
1215 ifmgd->csa_ignored_same_chan = false;
1216
1217 if (sdata->csa_block_tx)
1218 ieee80211_stop_vif_queues(local, sdata,
1219 IEEE80211_QUEUE_STOP_REASON_CSA);
1220 mutex_unlock(&local->mtx);
1221
1222 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1223 csa_ie.count);
1224
1225 if (local->ops->channel_switch) {
1226 /* use driver's channel switch callback */
1227 drv_channel_switch(local, sdata, &ch_switch);
1228 return;
1229 }
1230
1231 /* channel switch handled in software */
1232 if (csa_ie.count <= 1)
1233 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1234 else
1235 mod_timer(&ifmgd->chswitch_timer,
1236 TU_TO_EXP_TIME((csa_ie.count - 1) *
1237 cbss->beacon_interval));
1238 return;
1239 drop_connection:
1240 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1241 mutex_unlock(&local->chanctx_mtx);
1242 mutex_unlock(&local->mtx);
1243 }
1244
1245 static bool
1246 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1247 struct ieee80211_channel *channel,
1248 const u8 *country_ie, u8 country_ie_len,
1249 const u8 *pwr_constr_elem,
1250 int *chan_pwr, int *pwr_reduction)
1251 {
1252 struct ieee80211_country_ie_triplet *triplet;
1253 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1254 int i, chan_increment;
1255 bool have_chan_pwr = false;
1256
1257 /* Invalid IE */
1258 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1259 return false;
1260
1261 triplet = (void *)(country_ie + 3);
1262 country_ie_len -= 3;
1263
1264 switch (channel->band) {
1265 default:
1266 WARN_ON_ONCE(1);
1267 /* fall through */
1268 case NL80211_BAND_2GHZ:
1269 case NL80211_BAND_60GHZ:
1270 chan_increment = 1;
1271 break;
1272 case NL80211_BAND_5GHZ:
1273 chan_increment = 4;
1274 break;
1275 }
1276
1277 /* find channel */
1278 while (country_ie_len >= 3) {
1279 u8 first_channel = triplet->chans.first_channel;
1280
1281 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1282 goto next;
1283
1284 for (i = 0; i < triplet->chans.num_channels; i++) {
1285 if (first_channel + i * chan_increment == chan) {
1286 have_chan_pwr = true;
1287 *chan_pwr = triplet->chans.max_power;
1288 break;
1289 }
1290 }
1291 if (have_chan_pwr)
1292 break;
1293
1294 next:
1295 triplet++;
1296 country_ie_len -= 3;
1297 }
1298
1299 if (have_chan_pwr && pwr_constr_elem)
1300 *pwr_reduction = *pwr_constr_elem;
1301 else
1302 *pwr_reduction = 0;
1303
1304 return have_chan_pwr;
1305 }
1306
1307 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1308 struct ieee80211_channel *channel,
1309 const u8 *cisco_dtpc_ie,
1310 int *pwr_level)
1311 {
1312 /* From practical testing, the first data byte of the DTPC element
1313 * seems to contain the requested dBm level, and the CLI on Cisco
1314 * APs clearly state the range is -127 to 127 dBm, which indicates
1315 * a signed byte, although it seemingly never actually goes negative.
1316 * The other byte seems to always be zero.
1317 */
1318 *pwr_level = (__s8)cisco_dtpc_ie[4];
1319 }
1320
1321 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1322 struct ieee80211_channel *channel,
1323 struct ieee80211_mgmt *mgmt,
1324 const u8 *country_ie, u8 country_ie_len,
1325 const u8 *pwr_constr_ie,
1326 const u8 *cisco_dtpc_ie)
1327 {
1328 bool has_80211h_pwr = false, has_cisco_pwr = false;
1329 int chan_pwr = 0, pwr_reduction_80211h = 0;
1330 int pwr_level_cisco, pwr_level_80211h;
1331 int new_ap_level;
1332 __le16 capab = mgmt->u.probe_resp.capab_info;
1333
1334 if (country_ie &&
1335 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1336 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1337 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1338 sdata, channel, country_ie, country_ie_len,
1339 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1340 pwr_level_80211h =
1341 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1342 }
1343
1344 if (cisco_dtpc_ie) {
1345 ieee80211_find_cisco_dtpc(
1346 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1347 has_cisco_pwr = true;
1348 }
1349
1350 if (!has_80211h_pwr && !has_cisco_pwr)
1351 return 0;
1352
1353 /* If we have both 802.11h and Cisco DTPC, apply both limits
1354 * by picking the smallest of the two power levels advertised.
1355 */
1356 if (has_80211h_pwr &&
1357 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1358 new_ap_level = pwr_level_80211h;
1359
1360 if (sdata->ap_power_level == new_ap_level)
1361 return 0;
1362
1363 sdata_dbg(sdata,
1364 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1365 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1366 sdata->u.mgd.bssid);
1367 } else { /* has_cisco_pwr is always true here. */
1368 new_ap_level = pwr_level_cisco;
1369
1370 if (sdata->ap_power_level == new_ap_level)
1371 return 0;
1372
1373 sdata_dbg(sdata,
1374 "Limiting TX power to %d dBm as advertised by %pM\n",
1375 pwr_level_cisco, sdata->u.mgd.bssid);
1376 }
1377
1378 sdata->ap_power_level = new_ap_level;
1379 if (__ieee80211_recalc_txpower(sdata))
1380 return BSS_CHANGED_TXPOWER;
1381 return 0;
1382 }
1383
1384 /* powersave */
1385 static void ieee80211_enable_ps(struct ieee80211_local *local,
1386 struct ieee80211_sub_if_data *sdata)
1387 {
1388 struct ieee80211_conf *conf = &local->hw.conf;
1389
1390 /*
1391 * If we are scanning right now then the parameters will
1392 * take effect when scan finishes.
1393 */
1394 if (local->scanning)
1395 return;
1396
1397 if (conf->dynamic_ps_timeout > 0 &&
1398 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1399 mod_timer(&local->dynamic_ps_timer, jiffies +
1400 msecs_to_jiffies(conf->dynamic_ps_timeout));
1401 } else {
1402 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1403 ieee80211_send_nullfunc(local, sdata, true);
1404
1405 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1406 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1407 return;
1408
1409 conf->flags |= IEEE80211_CONF_PS;
1410 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1411 }
1412 }
1413
1414 static void ieee80211_change_ps(struct ieee80211_local *local)
1415 {
1416 struct ieee80211_conf *conf = &local->hw.conf;
1417
1418 if (local->ps_sdata) {
1419 ieee80211_enable_ps(local, local->ps_sdata);
1420 } else if (conf->flags & IEEE80211_CONF_PS) {
1421 conf->flags &= ~IEEE80211_CONF_PS;
1422 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1423 del_timer_sync(&local->dynamic_ps_timer);
1424 cancel_work_sync(&local->dynamic_ps_enable_work);
1425 }
1426 }
1427
1428 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1429 {
1430 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1431 struct sta_info *sta = NULL;
1432 bool authorized = false;
1433
1434 if (!mgd->powersave)
1435 return false;
1436
1437 if (mgd->broken_ap)
1438 return false;
1439
1440 if (!mgd->associated)
1441 return false;
1442
1443 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1444 return false;
1445
1446 if (!mgd->have_beacon)
1447 return false;
1448
1449 rcu_read_lock();
1450 sta = sta_info_get(sdata, mgd->bssid);
1451 if (sta)
1452 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1453 rcu_read_unlock();
1454
1455 return authorized;
1456 }
1457
1458 /* need to hold RTNL or interface lock */
1459 void ieee80211_recalc_ps(struct ieee80211_local *local)
1460 {
1461 struct ieee80211_sub_if_data *sdata, *found = NULL;
1462 int count = 0;
1463 int timeout;
1464
1465 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1466 local->ps_sdata = NULL;
1467 return;
1468 }
1469
1470 list_for_each_entry(sdata, &local->interfaces, list) {
1471 if (!ieee80211_sdata_running(sdata))
1472 continue;
1473 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1474 /* If an AP vif is found, then disable PS
1475 * by setting the count to zero thereby setting
1476 * ps_sdata to NULL.
1477 */
1478 count = 0;
1479 break;
1480 }
1481 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1482 continue;
1483 found = sdata;
1484 count++;
1485 }
1486
1487 if (count == 1 && ieee80211_powersave_allowed(found)) {
1488 u8 dtimper = found->u.mgd.dtim_period;
1489
1490 timeout = local->dynamic_ps_forced_timeout;
1491 if (timeout < 0)
1492 timeout = 100;
1493 local->hw.conf.dynamic_ps_timeout = timeout;
1494
1495 /* If the TIM IE is invalid, pretend the value is 1 */
1496 if (!dtimper)
1497 dtimper = 1;
1498
1499 local->hw.conf.ps_dtim_period = dtimper;
1500 local->ps_sdata = found;
1501 } else {
1502 local->ps_sdata = NULL;
1503 }
1504
1505 ieee80211_change_ps(local);
1506 }
1507
1508 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1509 {
1510 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1511
1512 if (sdata->vif.bss_conf.ps != ps_allowed) {
1513 sdata->vif.bss_conf.ps = ps_allowed;
1514 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1515 }
1516 }
1517
1518 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1519 {
1520 struct ieee80211_local *local =
1521 container_of(work, struct ieee80211_local,
1522 dynamic_ps_disable_work);
1523
1524 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1525 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1526 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1527 }
1528
1529 ieee80211_wake_queues_by_reason(&local->hw,
1530 IEEE80211_MAX_QUEUE_MAP,
1531 IEEE80211_QUEUE_STOP_REASON_PS,
1532 false);
1533 }
1534
1535 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1536 {
1537 struct ieee80211_local *local =
1538 container_of(work, struct ieee80211_local,
1539 dynamic_ps_enable_work);
1540 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1541 struct ieee80211_if_managed *ifmgd;
1542 unsigned long flags;
1543 int q;
1544
1545 /* can only happen when PS was just disabled anyway */
1546 if (!sdata)
1547 return;
1548
1549 ifmgd = &sdata->u.mgd;
1550
1551 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1552 return;
1553
1554 if (local->hw.conf.dynamic_ps_timeout > 0) {
1555 /* don't enter PS if TX frames are pending */
1556 if (drv_tx_frames_pending(local)) {
1557 mod_timer(&local->dynamic_ps_timer, jiffies +
1558 msecs_to_jiffies(
1559 local->hw.conf.dynamic_ps_timeout));
1560 return;
1561 }
1562
1563 /*
1564 * transmission can be stopped by others which leads to
1565 * dynamic_ps_timer expiry. Postpone the ps timer if it
1566 * is not the actual idle state.
1567 */
1568 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1569 for (q = 0; q < local->hw.queues; q++) {
1570 if (local->queue_stop_reasons[q]) {
1571 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1572 flags);
1573 mod_timer(&local->dynamic_ps_timer, jiffies +
1574 msecs_to_jiffies(
1575 local->hw.conf.dynamic_ps_timeout));
1576 return;
1577 }
1578 }
1579 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1580 }
1581
1582 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1583 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1584 if (drv_tx_frames_pending(local)) {
1585 mod_timer(&local->dynamic_ps_timer, jiffies +
1586 msecs_to_jiffies(
1587 local->hw.conf.dynamic_ps_timeout));
1588 } else {
1589 ieee80211_send_nullfunc(local, sdata, true);
1590 /* Flush to get the tx status of nullfunc frame */
1591 ieee80211_flush_queues(local, sdata, false);
1592 }
1593 }
1594
1595 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1596 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1597 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1598 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1599 local->hw.conf.flags |= IEEE80211_CONF_PS;
1600 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1601 }
1602 }
1603
1604 void ieee80211_dynamic_ps_timer(unsigned long data)
1605 {
1606 struct ieee80211_local *local = (void *) data;
1607
1608 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1609 }
1610
1611 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1612 {
1613 struct delayed_work *delayed_work = to_delayed_work(work);
1614 struct ieee80211_sub_if_data *sdata =
1615 container_of(delayed_work, struct ieee80211_sub_if_data,
1616 dfs_cac_timer_work);
1617 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1618
1619 mutex_lock(&sdata->local->mtx);
1620 if (sdata->wdev.cac_started) {
1621 ieee80211_vif_release_channel(sdata);
1622 cfg80211_cac_event(sdata->dev, &chandef,
1623 NL80211_RADAR_CAC_FINISHED,
1624 GFP_KERNEL);
1625 }
1626 mutex_unlock(&sdata->local->mtx);
1627 }
1628
1629 static bool
1630 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1631 {
1632 struct ieee80211_local *local = sdata->local;
1633 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1634 bool ret = false;
1635 int ac;
1636
1637 if (local->hw.queues < IEEE80211_NUM_ACS)
1638 return false;
1639
1640 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1641 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1642 int non_acm_ac;
1643 unsigned long now = jiffies;
1644
1645 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1646 tx_tspec->admitted_time &&
1647 time_after(now, tx_tspec->time_slice_start + HZ)) {
1648 tx_tspec->consumed_tx_time = 0;
1649 tx_tspec->time_slice_start = now;
1650
1651 if (tx_tspec->downgraded)
1652 tx_tspec->action =
1653 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1654 }
1655
1656 switch (tx_tspec->action) {
1657 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1658 /* take the original parameters */
1659 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1660 sdata_err(sdata,
1661 "failed to set TX queue parameters for queue %d\n",
1662 ac);
1663 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1664 tx_tspec->downgraded = false;
1665 ret = true;
1666 break;
1667 case TX_TSPEC_ACTION_DOWNGRADE:
1668 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1669 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1670 ret = true;
1671 break;
1672 }
1673 /* downgrade next lower non-ACM AC */
1674 for (non_acm_ac = ac + 1;
1675 non_acm_ac < IEEE80211_NUM_ACS;
1676 non_acm_ac++)
1677 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1678 break;
1679 /* Usually the loop will result in using BK even if it
1680 * requires admission control, but such a configuration
1681 * makes no sense and we have to transmit somehow - the
1682 * AC selection does the same thing.
1683 * If we started out trying to downgrade from BK, then
1684 * the extra condition here might be needed.
1685 */
1686 if (non_acm_ac >= IEEE80211_NUM_ACS)
1687 non_acm_ac = IEEE80211_AC_BK;
1688 if (drv_conf_tx(local, sdata, ac,
1689 &sdata->tx_conf[non_acm_ac]))
1690 sdata_err(sdata,
1691 "failed to set TX queue parameters for queue %d\n",
1692 ac);
1693 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1694 ret = true;
1695 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1696 tx_tspec->time_slice_start + HZ - now + 1);
1697 break;
1698 case TX_TSPEC_ACTION_NONE:
1699 /* nothing now */
1700 break;
1701 }
1702 }
1703
1704 return ret;
1705 }
1706
1707 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1708 {
1709 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1710 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1711 }
1712
1713 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1714 {
1715 struct ieee80211_sub_if_data *sdata;
1716
1717 sdata = container_of(work, struct ieee80211_sub_if_data,
1718 u.mgd.tx_tspec_wk.work);
1719 ieee80211_sta_handle_tspec_ac_params(sdata);
1720 }
1721
1722 /* MLME */
1723 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1724 struct ieee80211_sub_if_data *sdata,
1725 const u8 *wmm_param, size_t wmm_param_len)
1726 {
1727 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1728 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1729 size_t left;
1730 int count, ac;
1731 const u8 *pos;
1732 u8 uapsd_queues = 0;
1733
1734 if (!local->ops->conf_tx)
1735 return false;
1736
1737 if (local->hw.queues < IEEE80211_NUM_ACS)
1738 return false;
1739
1740 if (!wmm_param)
1741 return false;
1742
1743 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1744 return false;
1745
1746 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1747 uapsd_queues = ifmgd->uapsd_queues;
1748
1749 count = wmm_param[6] & 0x0f;
1750 if (count == ifmgd->wmm_last_param_set)
1751 return false;
1752 ifmgd->wmm_last_param_set = count;
1753
1754 pos = wmm_param + 8;
1755 left = wmm_param_len - 8;
1756
1757 memset(&params, 0, sizeof(params));
1758
1759 sdata->wmm_acm = 0;
1760 for (; left >= 4; left -= 4, pos += 4) {
1761 int aci = (pos[0] >> 5) & 0x03;
1762 int acm = (pos[0] >> 4) & 0x01;
1763 bool uapsd = false;
1764
1765 switch (aci) {
1766 case 1: /* AC_BK */
1767 ac = IEEE80211_AC_BK;
1768 if (acm)
1769 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1770 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1771 uapsd = true;
1772 break;
1773 case 2: /* AC_VI */
1774 ac = IEEE80211_AC_VI;
1775 if (acm)
1776 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1777 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1778 uapsd = true;
1779 break;
1780 case 3: /* AC_VO */
1781 ac = IEEE80211_AC_VO;
1782 if (acm)
1783 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1784 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1785 uapsd = true;
1786 break;
1787 case 0: /* AC_BE */
1788 default:
1789 ac = IEEE80211_AC_BE;
1790 if (acm)
1791 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1792 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1793 uapsd = true;
1794 break;
1795 }
1796
1797 params[ac].aifs = pos[0] & 0x0f;
1798
1799 if (params[ac].aifs < 2) {
1800 sdata_info(sdata,
1801 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1802 params[ac].aifs, aci);
1803 params[ac].aifs = 2;
1804 }
1805 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1806 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1807 params[ac].txop = get_unaligned_le16(pos + 2);
1808 params[ac].acm = acm;
1809 params[ac].uapsd = uapsd;
1810
1811 if (params[ac].cw_min > params[ac].cw_max) {
1812 sdata_info(sdata,
1813 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1814 params[ac].cw_min, params[ac].cw_max, aci);
1815 return false;
1816 }
1817 }
1818
1819 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1820 mlme_dbg(sdata,
1821 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1822 ac, params[ac].acm,
1823 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1824 params[ac].txop, params[ac].uapsd,
1825 ifmgd->tx_tspec[ac].downgraded);
1826 sdata->tx_conf[ac] = params[ac];
1827 if (!ifmgd->tx_tspec[ac].downgraded &&
1828 drv_conf_tx(local, sdata, ac, &params[ac]))
1829 sdata_err(sdata,
1830 "failed to set TX queue parameters for AC %d\n",
1831 ac);
1832 }
1833
1834 /* enable WMM or activate new settings */
1835 sdata->vif.bss_conf.qos = true;
1836 return true;
1837 }
1838
1839 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1840 {
1841 lockdep_assert_held(&sdata->local->mtx);
1842
1843 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1844 ieee80211_run_deferred_scan(sdata->local);
1845 }
1846
1847 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1848 {
1849 mutex_lock(&sdata->local->mtx);
1850 __ieee80211_stop_poll(sdata);
1851 mutex_unlock(&sdata->local->mtx);
1852 }
1853
1854 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1855 u16 capab, bool erp_valid, u8 erp)
1856 {
1857 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1858 struct ieee80211_supported_band *sband;
1859 u32 changed = 0;
1860 bool use_protection;
1861 bool use_short_preamble;
1862 bool use_short_slot;
1863
1864 sband = ieee80211_get_sband(sdata);
1865 if (!sband)
1866 return changed;
1867
1868 if (erp_valid) {
1869 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1870 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1871 } else {
1872 use_protection = false;
1873 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1874 }
1875
1876 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1877 if (sband->band == NL80211_BAND_5GHZ)
1878 use_short_slot = true;
1879
1880 if (use_protection != bss_conf->use_cts_prot) {
1881 bss_conf->use_cts_prot = use_protection;
1882 changed |= BSS_CHANGED_ERP_CTS_PROT;
1883 }
1884
1885 if (use_short_preamble != bss_conf->use_short_preamble) {
1886 bss_conf->use_short_preamble = use_short_preamble;
1887 changed |= BSS_CHANGED_ERP_PREAMBLE;
1888 }
1889
1890 if (use_short_slot != bss_conf->use_short_slot) {
1891 bss_conf->use_short_slot = use_short_slot;
1892 changed |= BSS_CHANGED_ERP_SLOT;
1893 }
1894
1895 return changed;
1896 }
1897
1898 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1899 struct cfg80211_bss *cbss,
1900 u32 bss_info_changed)
1901 {
1902 struct ieee80211_bss *bss = (void *)cbss->priv;
1903 struct ieee80211_local *local = sdata->local;
1904 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1905
1906 bss_info_changed |= BSS_CHANGED_ASSOC;
1907 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1908 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1909
1910 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1911 beacon_loss_count * bss_conf->beacon_int));
1912
1913 sdata->u.mgd.associated = cbss;
1914 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1915
1916 ieee80211_check_rate_mask(sdata);
1917
1918 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1919
1920 if (sdata->vif.p2p ||
1921 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
1922 const struct cfg80211_bss_ies *ies;
1923
1924 rcu_read_lock();
1925 ies = rcu_dereference(cbss->ies);
1926 if (ies) {
1927 int ret;
1928
1929 ret = cfg80211_get_p2p_attr(
1930 ies->data, ies->len,
1931 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1932 (u8 *) &bss_conf->p2p_noa_attr,
1933 sizeof(bss_conf->p2p_noa_attr));
1934 if (ret >= 2) {
1935 sdata->u.mgd.p2p_noa_index =
1936 bss_conf->p2p_noa_attr.index;
1937 bss_info_changed |= BSS_CHANGED_P2P_PS;
1938 }
1939 }
1940 rcu_read_unlock();
1941 }
1942
1943 /* just to be sure */
1944 ieee80211_stop_poll(sdata);
1945
1946 ieee80211_led_assoc(local, 1);
1947
1948 if (sdata->u.mgd.have_beacon) {
1949 /*
1950 * If the AP is buggy we may get here with no DTIM period
1951 * known, so assume it's 1 which is the only safe assumption
1952 * in that case, although if the TIM IE is broken powersave
1953 * probably just won't work at all.
1954 */
1955 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1956 bss_conf->beacon_rate = bss->beacon_rate;
1957 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1958 } else {
1959 bss_conf->beacon_rate = NULL;
1960 bss_conf->dtim_period = 0;
1961 }
1962
1963 bss_conf->assoc = 1;
1964
1965 /* Tell the driver to monitor connection quality (if supported) */
1966 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1967 bss_conf->cqm_rssi_thold)
1968 bss_info_changed |= BSS_CHANGED_CQM;
1969
1970 /* Enable ARP filtering */
1971 if (bss_conf->arp_addr_cnt)
1972 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1973
1974 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1975
1976 mutex_lock(&local->iflist_mtx);
1977 ieee80211_recalc_ps(local);
1978 mutex_unlock(&local->iflist_mtx);
1979
1980 ieee80211_recalc_smps(sdata);
1981 ieee80211_recalc_ps_vif(sdata);
1982
1983 netif_carrier_on(sdata->dev);
1984 }
1985
1986 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1987 u16 stype, u16 reason, bool tx,
1988 u8 *frame_buf)
1989 {
1990 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1991 struct ieee80211_local *local = sdata->local;
1992 u32 changed = 0;
1993
1994 sdata_assert_lock(sdata);
1995
1996 if (WARN_ON_ONCE(tx && !frame_buf))
1997 return;
1998
1999 if (WARN_ON(!ifmgd->associated))
2000 return;
2001
2002 ieee80211_stop_poll(sdata);
2003
2004 ifmgd->associated = NULL;
2005 netif_carrier_off(sdata->dev);
2006
2007 /*
2008 * if we want to get out of ps before disassoc (why?) we have
2009 * to do it before sending disassoc, as otherwise the null-packet
2010 * won't be valid.
2011 */
2012 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2013 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2014 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2015 }
2016 local->ps_sdata = NULL;
2017
2018 /* disable per-vif ps */
2019 ieee80211_recalc_ps_vif(sdata);
2020
2021 /* make sure ongoing transmission finishes */
2022 synchronize_net();
2023
2024 /*
2025 * drop any frame before deauth/disassoc, this can be data or
2026 * management frame. Since we are disconnecting, we should not
2027 * insist sending these frames which can take time and delay
2028 * the disconnection and possible the roaming.
2029 */
2030 if (tx)
2031 ieee80211_flush_queues(local, sdata, true);
2032
2033 /* deauthenticate/disassociate now */
2034 if (tx || frame_buf)
2035 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2036 reason, tx, frame_buf);
2037
2038 /* flush out frame - make sure the deauth was actually sent */
2039 if (tx)
2040 ieee80211_flush_queues(local, sdata, false);
2041
2042 /* clear bssid only after building the needed mgmt frames */
2043 eth_zero_addr(ifmgd->bssid);
2044
2045 /* remove AP and TDLS peers */
2046 sta_info_flush(sdata);
2047
2048 /* finally reset all BSS / config parameters */
2049 changed |= ieee80211_reset_erp_info(sdata);
2050
2051 ieee80211_led_assoc(local, 0);
2052 changed |= BSS_CHANGED_ASSOC;
2053 sdata->vif.bss_conf.assoc = false;
2054
2055 ifmgd->p2p_noa_index = -1;
2056 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2057 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2058
2059 /* on the next assoc, re-program HT/VHT parameters */
2060 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2061 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2062 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2063 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2064
2065 /* reset MU-MIMO ownership and group data */
2066 memset(sdata->vif.bss_conf.mu_group.membership, 0,
2067 sizeof(sdata->vif.bss_conf.mu_group.membership));
2068 memset(sdata->vif.bss_conf.mu_group.position, 0,
2069 sizeof(sdata->vif.bss_conf.mu_group.position));
2070 changed |= BSS_CHANGED_MU_GROUPS;
2071 sdata->vif.mu_mimo_owner = false;
2072
2073 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2074
2075 del_timer_sync(&local->dynamic_ps_timer);
2076 cancel_work_sync(&local->dynamic_ps_enable_work);
2077
2078 /* Disable ARP filtering */
2079 if (sdata->vif.bss_conf.arp_addr_cnt)
2080 changed |= BSS_CHANGED_ARP_FILTER;
2081
2082 sdata->vif.bss_conf.qos = false;
2083 changed |= BSS_CHANGED_QOS;
2084
2085 /* The BSSID (not really interesting) and HT changed */
2086 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2087 ieee80211_bss_info_change_notify(sdata, changed);
2088
2089 /* disassociated - set to defaults now */
2090 ieee80211_set_wmm_default(sdata, false, false);
2091
2092 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2093 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2094 del_timer_sync(&sdata->u.mgd.timer);
2095 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2096
2097 sdata->vif.bss_conf.dtim_period = 0;
2098 sdata->vif.bss_conf.beacon_rate = NULL;
2099
2100 ifmgd->have_beacon = false;
2101
2102 ifmgd->flags = 0;
2103 mutex_lock(&local->mtx);
2104 ieee80211_vif_release_channel(sdata);
2105
2106 sdata->vif.csa_active = false;
2107 ifmgd->csa_waiting_bcn = false;
2108 ifmgd->csa_ignored_same_chan = false;
2109 if (sdata->csa_block_tx) {
2110 ieee80211_wake_vif_queues(local, sdata,
2111 IEEE80211_QUEUE_STOP_REASON_CSA);
2112 sdata->csa_block_tx = false;
2113 }
2114 mutex_unlock(&local->mtx);
2115
2116 /* existing TX TSPEC sessions no longer exist */
2117 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2118 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2119
2120 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2121 }
2122
2123 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2124 struct ieee80211_hdr *hdr)
2125 {
2126 /*
2127 * We can postpone the mgd.timer whenever receiving unicast frames
2128 * from AP because we know that the connection is working both ways
2129 * at that time. But multicast frames (and hence also beacons) must
2130 * be ignored here, because we need to trigger the timer during
2131 * data idle periods for sending the periodic probe request to the
2132 * AP we're connected to.
2133 */
2134 if (is_multicast_ether_addr(hdr->addr1))
2135 return;
2136
2137 ieee80211_sta_reset_conn_monitor(sdata);
2138 }
2139
2140 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2141 {
2142 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2143 struct ieee80211_local *local = sdata->local;
2144
2145 mutex_lock(&local->mtx);
2146 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2147 goto out;
2148
2149 __ieee80211_stop_poll(sdata);
2150
2151 mutex_lock(&local->iflist_mtx);
2152 ieee80211_recalc_ps(local);
2153 mutex_unlock(&local->iflist_mtx);
2154
2155 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2156 goto out;
2157
2158 /*
2159 * We've received a probe response, but are not sure whether
2160 * we have or will be receiving any beacons or data, so let's
2161 * schedule the timers again, just in case.
2162 */
2163 ieee80211_sta_reset_beacon_monitor(sdata);
2164
2165 mod_timer(&ifmgd->conn_mon_timer,
2166 round_jiffies_up(jiffies +
2167 IEEE80211_CONNECTION_IDLE_TIME));
2168 out:
2169 mutex_unlock(&local->mtx);
2170 }
2171
2172 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2173 struct ieee80211_hdr *hdr,
2174 u16 tx_time)
2175 {
2176 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2177 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2178 int ac = ieee80211_ac_from_tid(tid);
2179 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2180 unsigned long now = jiffies;
2181
2182 if (likely(!tx_tspec->admitted_time))
2183 return;
2184
2185 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2186 tx_tspec->consumed_tx_time = 0;
2187 tx_tspec->time_slice_start = now;
2188
2189 if (tx_tspec->downgraded) {
2190 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2191 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2192 }
2193 }
2194
2195 if (tx_tspec->downgraded)
2196 return;
2197
2198 tx_tspec->consumed_tx_time += tx_time;
2199
2200 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2201 tx_tspec->downgraded = true;
2202 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2203 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2204 }
2205 }
2206
2207 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2208 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2209 {
2210 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2211
2212 if (!ieee80211_is_data(hdr->frame_control))
2213 return;
2214
2215 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2216 sdata->u.mgd.probe_send_count > 0) {
2217 if (ack)
2218 ieee80211_sta_reset_conn_monitor(sdata);
2219 else
2220 sdata->u.mgd.nullfunc_failed = true;
2221 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2222 return;
2223 }
2224
2225 if (ack)
2226 ieee80211_sta_reset_conn_monitor(sdata);
2227 }
2228
2229 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2230 {
2231 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2232 const u8 *ssid;
2233 u8 *dst = ifmgd->associated->bssid;
2234 u8 unicast_limit = max(1, max_probe_tries - 3);
2235 struct sta_info *sta;
2236
2237 /*
2238 * Try sending broadcast probe requests for the last three
2239 * probe requests after the first ones failed since some
2240 * buggy APs only support broadcast probe requests.
2241 */
2242 if (ifmgd->probe_send_count >= unicast_limit)
2243 dst = NULL;
2244
2245 /*
2246 * When the hardware reports an accurate Tx ACK status, it's
2247 * better to send a nullfunc frame instead of a probe request,
2248 * as it will kick us off the AP quickly if we aren't associated
2249 * anymore. The timeout will be reset if the frame is ACKed by
2250 * the AP.
2251 */
2252 ifmgd->probe_send_count++;
2253
2254 if (dst) {
2255 mutex_lock(&sdata->local->sta_mtx);
2256 sta = sta_info_get(sdata, dst);
2257 if (!WARN_ON(!sta))
2258 ieee80211_check_fast_rx(sta);
2259 mutex_unlock(&sdata->local->sta_mtx);
2260 }
2261
2262 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2263 ifmgd->nullfunc_failed = false;
2264 ieee80211_send_nullfunc(sdata->local, sdata, false);
2265 } else {
2266 int ssid_len;
2267
2268 rcu_read_lock();
2269 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2270 if (WARN_ON_ONCE(ssid == NULL))
2271 ssid_len = 0;
2272 else
2273 ssid_len = ssid[1];
2274
2275 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2276 ssid + 2, ssid_len, NULL,
2277 0, (u32) -1, true, 0,
2278 ifmgd->associated->channel, false);
2279 rcu_read_unlock();
2280 }
2281
2282 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2283 run_again(sdata, ifmgd->probe_timeout);
2284 }
2285
2286 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2287 bool beacon)
2288 {
2289 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2290 bool already = false;
2291
2292 if (!ieee80211_sdata_running(sdata))
2293 return;
2294
2295 sdata_lock(sdata);
2296
2297 if (!ifmgd->associated)
2298 goto out;
2299
2300 mutex_lock(&sdata->local->mtx);
2301
2302 if (sdata->local->tmp_channel || sdata->local->scanning) {
2303 mutex_unlock(&sdata->local->mtx);
2304 goto out;
2305 }
2306
2307 if (beacon) {
2308 mlme_dbg_ratelimited(sdata,
2309 "detected beacon loss from AP (missed %d beacons) - probing\n",
2310 beacon_loss_count);
2311
2312 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2313 }
2314
2315 /*
2316 * The driver/our work has already reported this event or the
2317 * connection monitoring has kicked in and we have already sent
2318 * a probe request. Or maybe the AP died and the driver keeps
2319 * reporting until we disassociate...
2320 *
2321 * In either case we have to ignore the current call to this
2322 * function (except for setting the correct probe reason bit)
2323 * because otherwise we would reset the timer every time and
2324 * never check whether we received a probe response!
2325 */
2326 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2327 already = true;
2328
2329 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2330
2331 mutex_unlock(&sdata->local->mtx);
2332
2333 if (already)
2334 goto out;
2335
2336 mutex_lock(&sdata->local->iflist_mtx);
2337 ieee80211_recalc_ps(sdata->local);
2338 mutex_unlock(&sdata->local->iflist_mtx);
2339
2340 ifmgd->probe_send_count = 0;
2341 ieee80211_mgd_probe_ap_send(sdata);
2342 out:
2343 sdata_unlock(sdata);
2344 }
2345
2346 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2347 struct ieee80211_vif *vif)
2348 {
2349 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2350 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2351 struct cfg80211_bss *cbss;
2352 struct sk_buff *skb;
2353 const u8 *ssid;
2354 int ssid_len;
2355
2356 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2357 return NULL;
2358
2359 sdata_assert_lock(sdata);
2360
2361 if (ifmgd->associated)
2362 cbss = ifmgd->associated;
2363 else if (ifmgd->auth_data)
2364 cbss = ifmgd->auth_data->bss;
2365 else if (ifmgd->assoc_data)
2366 cbss = ifmgd->assoc_data->bss;
2367 else
2368 return NULL;
2369
2370 rcu_read_lock();
2371 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2372 if (WARN_ON_ONCE(ssid == NULL))
2373 ssid_len = 0;
2374 else
2375 ssid_len = ssid[1];
2376
2377 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2378 (u32) -1, cbss->channel,
2379 ssid + 2, ssid_len,
2380 NULL, 0, true);
2381 rcu_read_unlock();
2382
2383 return skb;
2384 }
2385 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2386
2387 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2388 const u8 *buf, size_t len, bool tx,
2389 u16 reason)
2390 {
2391 struct ieee80211_event event = {
2392 .type = MLME_EVENT,
2393 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2394 .u.mlme.reason = reason,
2395 };
2396
2397 if (tx)
2398 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2399 else
2400 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2401
2402 drv_event_callback(sdata->local, sdata, &event);
2403 }
2404
2405 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2406 {
2407 struct ieee80211_local *local = sdata->local;
2408 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2409 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2410
2411 sdata_lock(sdata);
2412 if (!ifmgd->associated) {
2413 sdata_unlock(sdata);
2414 return;
2415 }
2416
2417 /* AP is probably out of range (or not reachable for another reason) so
2418 * remove the bss struct for that AP.
2419 */
2420 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2421
2422 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2423 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2424 true, frame_buf);
2425 mutex_lock(&local->mtx);
2426 sdata->vif.csa_active = false;
2427 ifmgd->csa_waiting_bcn = false;
2428 if (sdata->csa_block_tx) {
2429 ieee80211_wake_vif_queues(local, sdata,
2430 IEEE80211_QUEUE_STOP_REASON_CSA);
2431 sdata->csa_block_tx = false;
2432 }
2433 mutex_unlock(&local->mtx);
2434
2435 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2436 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2437
2438 sdata_unlock(sdata);
2439 }
2440
2441 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2442 {
2443 struct ieee80211_sub_if_data *sdata =
2444 container_of(work, struct ieee80211_sub_if_data,
2445 u.mgd.beacon_connection_loss_work);
2446 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2447
2448 if (ifmgd->associated)
2449 ifmgd->beacon_loss_count++;
2450
2451 if (ifmgd->connection_loss) {
2452 sdata_info(sdata, "Connection to AP %pM lost\n",
2453 ifmgd->bssid);
2454 __ieee80211_disconnect(sdata);
2455 } else {
2456 ieee80211_mgd_probe_ap(sdata, true);
2457 }
2458 }
2459
2460 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2461 {
2462 struct ieee80211_sub_if_data *sdata =
2463 container_of(work, struct ieee80211_sub_if_data,
2464 u.mgd.csa_connection_drop_work);
2465
2466 __ieee80211_disconnect(sdata);
2467 }
2468
2469 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2470 {
2471 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2472 struct ieee80211_hw *hw = &sdata->local->hw;
2473
2474 trace_api_beacon_loss(sdata);
2475
2476 sdata->u.mgd.connection_loss = false;
2477 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2478 }
2479 EXPORT_SYMBOL(ieee80211_beacon_loss);
2480
2481 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2482 {
2483 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2484 struct ieee80211_hw *hw = &sdata->local->hw;
2485
2486 trace_api_connection_loss(sdata);
2487
2488 sdata->u.mgd.connection_loss = true;
2489 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2490 }
2491 EXPORT_SYMBOL(ieee80211_connection_loss);
2492
2493
2494 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2495 bool assoc)
2496 {
2497 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2498
2499 sdata_assert_lock(sdata);
2500
2501 if (!assoc) {
2502 /*
2503 * we are not authenticated yet, the only timer that could be
2504 * running is the timeout for the authentication response which
2505 * which is not relevant anymore.
2506 */
2507 del_timer_sync(&sdata->u.mgd.timer);
2508 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2509
2510 eth_zero_addr(sdata->u.mgd.bssid);
2511 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2512 sdata->u.mgd.flags = 0;
2513 mutex_lock(&sdata->local->mtx);
2514 ieee80211_vif_release_channel(sdata);
2515 mutex_unlock(&sdata->local->mtx);
2516 }
2517
2518 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2519 kfree(auth_data);
2520 sdata->u.mgd.auth_data = NULL;
2521 }
2522
2523 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2524 bool assoc, bool abandon)
2525 {
2526 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2527
2528 sdata_assert_lock(sdata);
2529
2530 if (!assoc) {
2531 /*
2532 * we are not associated yet, the only timer that could be
2533 * running is the timeout for the association response which
2534 * which is not relevant anymore.
2535 */
2536 del_timer_sync(&sdata->u.mgd.timer);
2537 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2538
2539 eth_zero_addr(sdata->u.mgd.bssid);
2540 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2541 sdata->u.mgd.flags = 0;
2542 sdata->vif.mu_mimo_owner = false;
2543
2544 mutex_lock(&sdata->local->mtx);
2545 ieee80211_vif_release_channel(sdata);
2546 mutex_unlock(&sdata->local->mtx);
2547
2548 if (abandon)
2549 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2550 }
2551
2552 kfree(assoc_data);
2553 sdata->u.mgd.assoc_data = NULL;
2554 }
2555
2556 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2557 struct ieee80211_mgmt *mgmt, size_t len)
2558 {
2559 struct ieee80211_local *local = sdata->local;
2560 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2561 u8 *pos;
2562 struct ieee802_11_elems elems;
2563 u32 tx_flags = 0;
2564
2565 pos = mgmt->u.auth.variable;
2566 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2567 if (!elems.challenge)
2568 return;
2569 auth_data->expected_transaction = 4;
2570 drv_mgd_prepare_tx(sdata->local, sdata);
2571 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2572 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2573 IEEE80211_TX_INTFL_MLME_CONN_TX;
2574 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2575 elems.challenge - 2, elems.challenge_len + 2,
2576 auth_data->bss->bssid, auth_data->bss->bssid,
2577 auth_data->key, auth_data->key_len,
2578 auth_data->key_idx, tx_flags);
2579 }
2580
2581 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2582 struct ieee80211_mgmt *mgmt, size_t len)
2583 {
2584 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2585 u8 bssid[ETH_ALEN];
2586 u16 auth_alg, auth_transaction, status_code;
2587 struct sta_info *sta;
2588 struct ieee80211_event event = {
2589 .type = MLME_EVENT,
2590 .u.mlme.data = AUTH_EVENT,
2591 };
2592
2593 sdata_assert_lock(sdata);
2594
2595 if (len < 24 + 6)
2596 return;
2597
2598 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2599 return;
2600
2601 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2602
2603 if (!ether_addr_equal(bssid, mgmt->bssid))
2604 return;
2605
2606 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2607 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2608 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2609
2610 if (auth_alg != ifmgd->auth_data->algorithm ||
2611 auth_transaction != ifmgd->auth_data->expected_transaction) {
2612 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2613 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2614 auth_transaction,
2615 ifmgd->auth_data->expected_transaction);
2616 return;
2617 }
2618
2619 if (status_code != WLAN_STATUS_SUCCESS) {
2620 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2621 mgmt->sa, status_code);
2622 ieee80211_destroy_auth_data(sdata, false);
2623 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2624 event.u.mlme.status = MLME_DENIED;
2625 event.u.mlme.reason = status_code;
2626 drv_event_callback(sdata->local, sdata, &event);
2627 return;
2628 }
2629
2630 switch (ifmgd->auth_data->algorithm) {
2631 case WLAN_AUTH_OPEN:
2632 case WLAN_AUTH_LEAP:
2633 case WLAN_AUTH_FT:
2634 case WLAN_AUTH_SAE:
2635 case WLAN_AUTH_FILS_SK:
2636 case WLAN_AUTH_FILS_SK_PFS:
2637 case WLAN_AUTH_FILS_PK:
2638 break;
2639 case WLAN_AUTH_SHARED_KEY:
2640 if (ifmgd->auth_data->expected_transaction != 4) {
2641 ieee80211_auth_challenge(sdata, mgmt, len);
2642 /* need another frame */
2643 return;
2644 }
2645 break;
2646 default:
2647 WARN_ONCE(1, "invalid auth alg %d",
2648 ifmgd->auth_data->algorithm);
2649 return;
2650 }
2651
2652 event.u.mlme.status = MLME_SUCCESS;
2653 drv_event_callback(sdata->local, sdata, &event);
2654 sdata_info(sdata, "authenticated\n");
2655 ifmgd->auth_data->done = true;
2656 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2657 ifmgd->auth_data->timeout_started = true;
2658 run_again(sdata, ifmgd->auth_data->timeout);
2659
2660 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2661 ifmgd->auth_data->expected_transaction != 2) {
2662 /*
2663 * Report auth frame to user space for processing since another
2664 * round of Authentication frames is still needed.
2665 */
2666 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2667 return;
2668 }
2669
2670 /* move station state to auth */
2671 mutex_lock(&sdata->local->sta_mtx);
2672 sta = sta_info_get(sdata, bssid);
2673 if (!sta) {
2674 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2675 goto out_err;
2676 }
2677 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2678 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2679 goto out_err;
2680 }
2681 mutex_unlock(&sdata->local->sta_mtx);
2682
2683 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2684 return;
2685 out_err:
2686 mutex_unlock(&sdata->local->sta_mtx);
2687 /* ignore frame -- wait for timeout */
2688 }
2689
2690 #define case_WLAN(type) \
2691 case WLAN_REASON_##type: return #type
2692
2693 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2694 {
2695 switch (reason_code) {
2696 case_WLAN(UNSPECIFIED);
2697 case_WLAN(PREV_AUTH_NOT_VALID);
2698 case_WLAN(DEAUTH_LEAVING);
2699 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2700 case_WLAN(DISASSOC_AP_BUSY);
2701 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2702 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2703 case_WLAN(DISASSOC_STA_HAS_LEFT);
2704 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2705 case_WLAN(DISASSOC_BAD_POWER);
2706 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2707 case_WLAN(INVALID_IE);
2708 case_WLAN(MIC_FAILURE);
2709 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2710 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2711 case_WLAN(IE_DIFFERENT);
2712 case_WLAN(INVALID_GROUP_CIPHER);
2713 case_WLAN(INVALID_PAIRWISE_CIPHER);
2714 case_WLAN(INVALID_AKMP);
2715 case_WLAN(UNSUPP_RSN_VERSION);
2716 case_WLAN(INVALID_RSN_IE_CAP);
2717 case_WLAN(IEEE8021X_FAILED);
2718 case_WLAN(CIPHER_SUITE_REJECTED);
2719 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2720 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2721 case_WLAN(DISASSOC_LOW_ACK);
2722 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2723 case_WLAN(QSTA_LEAVE_QBSS);
2724 case_WLAN(QSTA_NOT_USE);
2725 case_WLAN(QSTA_REQUIRE_SETUP);
2726 case_WLAN(QSTA_TIMEOUT);
2727 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2728 case_WLAN(MESH_PEER_CANCELED);
2729 case_WLAN(MESH_MAX_PEERS);
2730 case_WLAN(MESH_CONFIG);
2731 case_WLAN(MESH_CLOSE);
2732 case_WLAN(MESH_MAX_RETRIES);
2733 case_WLAN(MESH_CONFIRM_TIMEOUT);
2734 case_WLAN(MESH_INVALID_GTK);
2735 case_WLAN(MESH_INCONSISTENT_PARAM);
2736 case_WLAN(MESH_INVALID_SECURITY);
2737 case_WLAN(MESH_PATH_ERROR);
2738 case_WLAN(MESH_PATH_NOFORWARD);
2739 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2740 case_WLAN(MAC_EXISTS_IN_MBSS);
2741 case_WLAN(MESH_CHAN_REGULATORY);
2742 case_WLAN(MESH_CHAN);
2743 default: return "<unknown>";
2744 }
2745 }
2746
2747 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2748 struct ieee80211_mgmt *mgmt, size_t len)
2749 {
2750 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2751 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2752
2753 sdata_assert_lock(sdata);
2754
2755 if (len < 24 + 2)
2756 return;
2757
2758 if (ifmgd->associated &&
2759 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2760 const u8 *bssid = ifmgd->associated->bssid;
2761
2762 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2763 bssid, reason_code,
2764 ieee80211_get_reason_code_string(reason_code));
2765
2766 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2767
2768 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2769 reason_code);
2770 return;
2771 }
2772
2773 if (ifmgd->assoc_data &&
2774 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2775 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2776
2777 sdata_info(sdata,
2778 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2779 bssid, reason_code,
2780 ieee80211_get_reason_code_string(reason_code));
2781
2782 ieee80211_destroy_assoc_data(sdata, false, true);
2783
2784 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2785 return;
2786 }
2787 }
2788
2789
2790 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2791 struct ieee80211_mgmt *mgmt, size_t len)
2792 {
2793 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2794 u16 reason_code;
2795
2796 sdata_assert_lock(sdata);
2797
2798 if (len < 24 + 2)
2799 return;
2800
2801 if (!ifmgd->associated ||
2802 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2803 return;
2804
2805 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2806
2807 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
2808 mgmt->sa, reason_code,
2809 ieee80211_get_reason_code_string(reason_code));
2810
2811 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2812
2813 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2814 }
2815
2816 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2817 u8 *supp_rates, unsigned int supp_rates_len,
2818 u32 *rates, u32 *basic_rates,
2819 bool *have_higher_than_11mbit,
2820 int *min_rate, int *min_rate_index,
2821 int shift, u32 rate_flags)
2822 {
2823 int i, j;
2824
2825 for (i = 0; i < supp_rates_len; i++) {
2826 int rate = supp_rates[i] & 0x7f;
2827 bool is_basic = !!(supp_rates[i] & 0x80);
2828
2829 if ((rate * 5 * (1 << shift)) > 110)
2830 *have_higher_than_11mbit = true;
2831
2832 /*
2833 * Skip HT and VHT BSS membership selectors since they're not
2834 * rates.
2835 *
2836 * Note: Even though the membership selector and the basic
2837 * rate flag share the same bit, they are not exactly
2838 * the same.
2839 */
2840 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
2841 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
2842 continue;
2843
2844 for (j = 0; j < sband->n_bitrates; j++) {
2845 struct ieee80211_rate *br;
2846 int brate;
2847
2848 br = &sband->bitrates[j];
2849 if ((rate_flags & br->flags) != rate_flags)
2850 continue;
2851
2852 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2853 if (brate == rate) {
2854 *rates |= BIT(j);
2855 if (is_basic)
2856 *basic_rates |= BIT(j);
2857 if ((rate * 5) < *min_rate) {
2858 *min_rate = rate * 5;
2859 *min_rate_index = j;
2860 }
2861 break;
2862 }
2863 }
2864 }
2865 }
2866
2867 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2868 struct cfg80211_bss *cbss,
2869 struct ieee80211_mgmt *mgmt, size_t len)
2870 {
2871 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2872 struct ieee80211_local *local = sdata->local;
2873 struct ieee80211_supported_band *sband;
2874 struct sta_info *sta;
2875 u8 *pos;
2876 u16 capab_info, aid;
2877 struct ieee802_11_elems elems;
2878 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2879 const struct cfg80211_bss_ies *bss_ies = NULL;
2880 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2881 u32 changed = 0;
2882 int err;
2883 bool ret;
2884
2885 /* AssocResp and ReassocResp have identical structure */
2886
2887 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2888 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2889
2890 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2891 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2892 aid);
2893 aid &= ~(BIT(15) | BIT(14));
2894
2895 ifmgd->broken_ap = false;
2896
2897 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2898 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2899 aid);
2900 aid = 0;
2901 ifmgd->broken_ap = true;
2902 }
2903
2904 pos = mgmt->u.assoc_resp.variable;
2905 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2906
2907 if (!elems.supp_rates) {
2908 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2909 return false;
2910 }
2911
2912 ifmgd->aid = aid;
2913 ifmgd->tdls_chan_switch_prohibited =
2914 elems.ext_capab && elems.ext_capab_len >= 5 &&
2915 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2916
2917 /*
2918 * Some APs are erroneously not including some information in their
2919 * (re)association response frames. Try to recover by using the data
2920 * from the beacon or probe response. This seems to afflict mobile
2921 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2922 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2923 */
2924 if ((assoc_data->wmm && !elems.wmm_param) ||
2925 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2926 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2927 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2928 (!elems.vht_cap_elem || !elems.vht_operation))) {
2929 const struct cfg80211_bss_ies *ies;
2930 struct ieee802_11_elems bss_elems;
2931
2932 rcu_read_lock();
2933 ies = rcu_dereference(cbss->ies);
2934 if (ies)
2935 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2936 GFP_ATOMIC);
2937 rcu_read_unlock();
2938 if (!bss_ies)
2939 return false;
2940
2941 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2942 false, &bss_elems);
2943 if (assoc_data->wmm &&
2944 !elems.wmm_param && bss_elems.wmm_param) {
2945 elems.wmm_param = bss_elems.wmm_param;
2946 sdata_info(sdata,
2947 "AP bug: WMM param missing from AssocResp\n");
2948 }
2949
2950 /*
2951 * Also check if we requested HT/VHT, otherwise the AP doesn't
2952 * have to include the IEs in the (re)association response.
2953 */
2954 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2955 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2956 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2957 sdata_info(sdata,
2958 "AP bug: HT capability missing from AssocResp\n");
2959 }
2960 if (!elems.ht_operation && bss_elems.ht_operation &&
2961 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2962 elems.ht_operation = bss_elems.ht_operation;
2963 sdata_info(sdata,
2964 "AP bug: HT operation missing from AssocResp\n");
2965 }
2966 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2967 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2968 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2969 sdata_info(sdata,
2970 "AP bug: VHT capa missing from AssocResp\n");
2971 }
2972 if (!elems.vht_operation && bss_elems.vht_operation &&
2973 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2974 elems.vht_operation = bss_elems.vht_operation;
2975 sdata_info(sdata,
2976 "AP bug: VHT operation missing from AssocResp\n");
2977 }
2978 }
2979
2980 /*
2981 * We previously checked these in the beacon/probe response, so
2982 * they should be present here. This is just a safety net.
2983 */
2984 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2985 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2986 sdata_info(sdata,
2987 "HT AP is missing WMM params or HT capability/operation\n");
2988 ret = false;
2989 goto out;
2990 }
2991
2992 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2993 (!elems.vht_cap_elem || !elems.vht_operation)) {
2994 sdata_info(sdata,
2995 "VHT AP is missing VHT capability/operation\n");
2996 ret = false;
2997 goto out;
2998 }
2999
3000 mutex_lock(&sdata->local->sta_mtx);
3001 /*
3002 * station info was already allocated and inserted before
3003 * the association and should be available to us
3004 */
3005 sta = sta_info_get(sdata, cbss->bssid);
3006 if (WARN_ON(!sta)) {
3007 mutex_unlock(&sdata->local->sta_mtx);
3008 ret = false;
3009 goto out;
3010 }
3011
3012 sband = ieee80211_get_sband(sdata);
3013 if (!sband) {
3014 mutex_unlock(&sdata->local->sta_mtx);
3015 ret = false;
3016 goto out;
3017 }
3018
3019 /* Set up internal HT/VHT capabilities */
3020 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3021 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3022 elems.ht_cap_elem, sta);
3023
3024 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3025 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3026 elems.vht_cap_elem, sta);
3027
3028 /*
3029 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3030 * in their association response, so ignore that data for our own
3031 * configuration. If it changed since the last beacon, we'll get the
3032 * next beacon and update then.
3033 */
3034
3035 /*
3036 * If an operating mode notification IE is present, override the
3037 * NSS calculation (that would be done in rate_control_rate_init())
3038 * and use the # of streams from that element.
3039 */
3040 if (elems.opmode_notif &&
3041 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3042 u8 nss;
3043
3044 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3045 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3046 nss += 1;
3047 sta->sta.rx_nss = nss;
3048 }
3049
3050 rate_control_rate_init(sta);
3051
3052 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3053 set_sta_flag(sta, WLAN_STA_MFP);
3054 sta->sta.mfp = true;
3055 } else {
3056 sta->sta.mfp = false;
3057 }
3058
3059 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3060
3061 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3062 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3063 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3064 if (err) {
3065 sdata_info(sdata,
3066 "failed to move station %pM to desired state\n",
3067 sta->sta.addr);
3068 WARN_ON(__sta_info_destroy(sta));
3069 mutex_unlock(&sdata->local->sta_mtx);
3070 ret = false;
3071 goto out;
3072 }
3073
3074 mutex_unlock(&sdata->local->sta_mtx);
3075
3076 /*
3077 * Always handle WMM once after association regardless
3078 * of the first value the AP uses. Setting -1 here has
3079 * that effect because the AP values is an unsigned
3080 * 4-bit value.
3081 */
3082 ifmgd->wmm_last_param_set = -1;
3083
3084 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3085 ieee80211_set_wmm_default(sdata, false, false);
3086 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3087 elems.wmm_param_len)) {
3088 /* still enable QoS since we might have HT/VHT */
3089 ieee80211_set_wmm_default(sdata, false, true);
3090 /* set the disable-WMM flag in this case to disable
3091 * tracking WMM parameter changes in the beacon if
3092 * the parameters weren't actually valid. Doing so
3093 * avoids changing parameters very strangely when
3094 * the AP is going back and forth between valid and
3095 * invalid parameters.
3096 */
3097 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3098 }
3099 changed |= BSS_CHANGED_QOS;
3100
3101 if (elems.max_idle_period_ie) {
3102 bss_conf->max_idle_period =
3103 le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
3104 bss_conf->protected_keep_alive =
3105 !!(elems.max_idle_period_ie->idle_options &
3106 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3107 changed |= BSS_CHANGED_KEEP_ALIVE;
3108 } else {
3109 bss_conf->max_idle_period = 0;
3110 bss_conf->protected_keep_alive = false;
3111 }
3112
3113 /* set AID and assoc capability,
3114 * ieee80211_set_associated() will tell the driver */
3115 bss_conf->aid = aid;
3116 bss_conf->assoc_capability = capab_info;
3117 ieee80211_set_associated(sdata, cbss, changed);
3118
3119 /*
3120 * If we're using 4-addr mode, let the AP know that we're
3121 * doing so, so that it can create the STA VLAN on its side
3122 */
3123 if (ifmgd->use_4addr)
3124 ieee80211_send_4addr_nullfunc(local, sdata);
3125
3126 /*
3127 * Start timer to probe the connection to the AP now.
3128 * Also start the timer that will detect beacon loss.
3129 */
3130 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3131 ieee80211_sta_reset_beacon_monitor(sdata);
3132
3133 ret = true;
3134 out:
3135 kfree(bss_ies);
3136 return ret;
3137 }
3138
3139 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3140 struct ieee80211_mgmt *mgmt,
3141 size_t len)
3142 {
3143 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3144 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3145 u16 capab_info, status_code, aid;
3146 struct ieee802_11_elems elems;
3147 int ac, uapsd_queues = -1;
3148 u8 *pos;
3149 bool reassoc;
3150 struct cfg80211_bss *bss;
3151 struct ieee80211_event event = {
3152 .type = MLME_EVENT,
3153 .u.mlme.data = ASSOC_EVENT,
3154 };
3155
3156 sdata_assert_lock(sdata);
3157
3158 if (!assoc_data)
3159 return;
3160 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3161 return;
3162
3163 /*
3164 * AssocResp and ReassocResp have identical structure, so process both
3165 * of them in this function.
3166 */
3167
3168 if (len < 24 + 6)
3169 return;
3170
3171 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3172 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3173 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3174 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3175
3176 sdata_info(sdata,
3177 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3178 reassoc ? "Rea" : "A", mgmt->sa,
3179 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3180
3181 if (assoc_data->fils_kek_len &&
3182 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3183 return;
3184
3185 pos = mgmt->u.assoc_resp.variable;
3186 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3187
3188 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3189 elems.timeout_int &&
3190 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3191 u32 tu, ms;
3192 tu = le32_to_cpu(elems.timeout_int->value);
3193 ms = tu * 1024 / 1000;
3194 sdata_info(sdata,
3195 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3196 mgmt->sa, tu, ms);
3197 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3198 assoc_data->timeout_started = true;
3199 if (ms > IEEE80211_ASSOC_TIMEOUT)
3200 run_again(sdata, assoc_data->timeout);
3201 return;
3202 }
3203
3204 bss = assoc_data->bss;
3205
3206 if (status_code != WLAN_STATUS_SUCCESS) {
3207 sdata_info(sdata, "%pM denied association (code=%d)\n",
3208 mgmt->sa, status_code);
3209 ieee80211_destroy_assoc_data(sdata, false, false);
3210 event.u.mlme.status = MLME_DENIED;
3211 event.u.mlme.reason = status_code;
3212 drv_event_callback(sdata->local, sdata, &event);
3213 } else {
3214 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3215 /* oops -- internal error -- send timeout for now */
3216 ieee80211_destroy_assoc_data(sdata, false, false);
3217 cfg80211_assoc_timeout(sdata->dev, bss);
3218 return;
3219 }
3220 event.u.mlme.status = MLME_SUCCESS;
3221 drv_event_callback(sdata->local, sdata, &event);
3222 sdata_info(sdata, "associated\n");
3223
3224 /*
3225 * destroy assoc_data afterwards, as otherwise an idle
3226 * recalc after assoc_data is NULL but before associated
3227 * is set can cause the interface to go idle
3228 */
3229 ieee80211_destroy_assoc_data(sdata, true, false);
3230
3231 /* get uapsd queues configuration */
3232 uapsd_queues = 0;
3233 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3234 if (sdata->tx_conf[ac].uapsd)
3235 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3236 }
3237
3238 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3239 }
3240
3241 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3242 struct ieee80211_mgmt *mgmt, size_t len,
3243 struct ieee80211_rx_status *rx_status,
3244 struct ieee802_11_elems *elems)
3245 {
3246 struct ieee80211_local *local = sdata->local;
3247 struct ieee80211_bss *bss;
3248 struct ieee80211_channel *channel;
3249
3250 sdata_assert_lock(sdata);
3251
3252 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3253 if (!channel)
3254 return;
3255
3256 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3257 channel);
3258 if (bss) {
3259 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3260 ieee80211_rx_bss_put(local, bss);
3261 }
3262 }
3263
3264
3265 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3266 struct sk_buff *skb)
3267 {
3268 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3269 struct ieee80211_if_managed *ifmgd;
3270 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3271 size_t baselen, len = skb->len;
3272 struct ieee802_11_elems elems;
3273
3274 ifmgd = &sdata->u.mgd;
3275
3276 sdata_assert_lock(sdata);
3277
3278 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3279 return; /* ignore ProbeResp to foreign address */
3280
3281 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3282 if (baselen > len)
3283 return;
3284
3285 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3286 false, &elems);
3287
3288 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3289
3290 if (ifmgd->associated &&
3291 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3292 ieee80211_reset_ap_probe(sdata);
3293 }
3294
3295 /*
3296 * This is the canonical list of information elements we care about,
3297 * the filter code also gives us all changes to the Microsoft OUI
3298 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3299 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3300 * changes to requested client power.
3301 *
3302 * We implement beacon filtering in software since that means we can
3303 * avoid processing the frame here and in cfg80211, and userspace
3304 * will not be able to tell whether the hardware supports it or not.
3305 *
3306 * XXX: This list needs to be dynamic -- userspace needs to be able to
3307 * add items it requires. It also needs to be able to tell us to
3308 * look out for other vendor IEs.
3309 */
3310 static const u64 care_about_ies =
3311 (1ULL << WLAN_EID_COUNTRY) |
3312 (1ULL << WLAN_EID_ERP_INFO) |
3313 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3314 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3315 (1ULL << WLAN_EID_HT_CAPABILITY) |
3316 (1ULL << WLAN_EID_HT_OPERATION) |
3317 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3318
3319 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3320 struct ieee80211_mgmt *mgmt, size_t len,
3321 struct ieee80211_rx_status *rx_status)
3322 {
3323 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3324 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3325 size_t baselen;
3326 struct ieee802_11_elems elems;
3327 struct ieee80211_local *local = sdata->local;
3328 struct ieee80211_chanctx_conf *chanctx_conf;
3329 struct ieee80211_channel *chan;
3330 struct sta_info *sta;
3331 u32 changed = 0;
3332 bool erp_valid;
3333 u8 erp_value = 0;
3334 u32 ncrc;
3335 u8 *bssid;
3336 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3337
3338 sdata_assert_lock(sdata);
3339
3340 /* Process beacon from the current BSS */
3341 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3342 if (baselen > len)
3343 return;
3344
3345 rcu_read_lock();
3346 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3347 if (!chanctx_conf) {
3348 rcu_read_unlock();
3349 return;
3350 }
3351
3352 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3353 rcu_read_unlock();
3354 return;
3355 }
3356 chan = chanctx_conf->def.chan;
3357 rcu_read_unlock();
3358
3359 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3360 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3361 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3362 len - baselen, false, &elems);
3363
3364 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3365 if (elems.tim && !elems.parse_error) {
3366 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3367 ifmgd->dtim_period = tim_ie->dtim_period;
3368 }
3369 ifmgd->have_beacon = true;
3370 ifmgd->assoc_data->need_beacon = false;
3371 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3372 sdata->vif.bss_conf.sync_tsf =
3373 le64_to_cpu(mgmt->u.beacon.timestamp);
3374 sdata->vif.bss_conf.sync_device_ts =
3375 rx_status->device_timestamp;
3376 if (elems.tim)
3377 sdata->vif.bss_conf.sync_dtim_count =
3378 elems.tim->dtim_count;
3379 else
3380 sdata->vif.bss_conf.sync_dtim_count = 0;
3381 }
3382 /* continue assoc process */
3383 ifmgd->assoc_data->timeout = jiffies;
3384 ifmgd->assoc_data->timeout_started = true;
3385 run_again(sdata, ifmgd->assoc_data->timeout);
3386 return;
3387 }
3388
3389 if (!ifmgd->associated ||
3390 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3391 return;
3392 bssid = ifmgd->associated->bssid;
3393
3394 /* Track average RSSI from the Beacon frames of the current AP */
3395 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3396 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3397 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3398 ifmgd->last_cqm_event_signal = 0;
3399 ifmgd->count_beacon_signal = 1;
3400 ifmgd->last_ave_beacon_signal = 0;
3401 } else {
3402 ifmgd->count_beacon_signal++;
3403 }
3404
3405 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3406
3407 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3408 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3409 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3410 int last_sig = ifmgd->last_ave_beacon_signal;
3411 struct ieee80211_event event = {
3412 .type = RSSI_EVENT,
3413 };
3414
3415 /*
3416 * if signal crosses either of the boundaries, invoke callback
3417 * with appropriate parameters
3418 */
3419 if (sig > ifmgd->rssi_max_thold &&
3420 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3421 ifmgd->last_ave_beacon_signal = sig;
3422 event.u.rssi.data = RSSI_EVENT_HIGH;
3423 drv_event_callback(local, sdata, &event);
3424 } else if (sig < ifmgd->rssi_min_thold &&
3425 (last_sig >= ifmgd->rssi_max_thold ||
3426 last_sig == 0)) {
3427 ifmgd->last_ave_beacon_signal = sig;
3428 event.u.rssi.data = RSSI_EVENT_LOW;
3429 drv_event_callback(local, sdata, &event);
3430 }
3431 }
3432
3433 if (bss_conf->cqm_rssi_thold &&
3434 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3435 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3436 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3437 int last_event = ifmgd->last_cqm_event_signal;
3438 int thold = bss_conf->cqm_rssi_thold;
3439 int hyst = bss_conf->cqm_rssi_hyst;
3440
3441 if (sig < thold &&
3442 (last_event == 0 || sig < last_event - hyst)) {
3443 ifmgd->last_cqm_event_signal = sig;
3444 ieee80211_cqm_rssi_notify(
3445 &sdata->vif,
3446 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3447 sig, GFP_KERNEL);
3448 } else if (sig > thold &&
3449 (last_event == 0 || sig > last_event + hyst)) {
3450 ifmgd->last_cqm_event_signal = sig;
3451 ieee80211_cqm_rssi_notify(
3452 &sdata->vif,
3453 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3454 sig, GFP_KERNEL);
3455 }
3456 }
3457
3458 if (bss_conf->cqm_rssi_low &&
3459 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3460 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3461 int last_event = ifmgd->last_cqm_event_signal;
3462 int low = bss_conf->cqm_rssi_low;
3463 int high = bss_conf->cqm_rssi_high;
3464
3465 if (sig < low &&
3466 (last_event == 0 || last_event >= low)) {
3467 ifmgd->last_cqm_event_signal = sig;
3468 ieee80211_cqm_rssi_notify(
3469 &sdata->vif,
3470 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3471 sig, GFP_KERNEL);
3472 } else if (sig > high &&
3473 (last_event == 0 || last_event <= high)) {
3474 ifmgd->last_cqm_event_signal = sig;
3475 ieee80211_cqm_rssi_notify(
3476 &sdata->vif,
3477 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3478 sig, GFP_KERNEL);
3479 }
3480 }
3481
3482 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3483 mlme_dbg_ratelimited(sdata,
3484 "cancelling AP probe due to a received beacon\n");
3485 ieee80211_reset_ap_probe(sdata);
3486 }
3487
3488 /*
3489 * Push the beacon loss detection into the future since
3490 * we are processing a beacon from the AP just now.
3491 */
3492 ieee80211_sta_reset_beacon_monitor(sdata);
3493
3494 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3495 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3496 len - baselen, false, &elems,
3497 care_about_ies, ncrc);
3498
3499 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3500 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3501 if (local->hw.conf.dynamic_ps_timeout > 0) {
3502 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3503 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3504 ieee80211_hw_config(local,
3505 IEEE80211_CONF_CHANGE_PS);
3506 }
3507 ieee80211_send_nullfunc(local, sdata, false);
3508 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3509 local->pspolling = true;
3510
3511 /*
3512 * Here is assumed that the driver will be
3513 * able to send ps-poll frame and receive a
3514 * response even though power save mode is
3515 * enabled, but some drivers might require
3516 * to disable power save here. This needs
3517 * to be investigated.
3518 */
3519 ieee80211_send_pspoll(local, sdata);
3520 }
3521 }
3522
3523 if (sdata->vif.p2p ||
3524 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3525 struct ieee80211_p2p_noa_attr noa = {};
3526 int ret;
3527
3528 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3529 len - baselen,
3530 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3531 (u8 *) &noa, sizeof(noa));
3532 if (ret >= 2) {
3533 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3534 /* valid noa_attr and index changed */
3535 sdata->u.mgd.p2p_noa_index = noa.index;
3536 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3537 changed |= BSS_CHANGED_P2P_PS;
3538 /*
3539 * make sure we update all information, the CRC
3540 * mechanism doesn't look at P2P attributes.
3541 */
3542 ifmgd->beacon_crc_valid = false;
3543 }
3544 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3545 /* noa_attr not found and we had valid noa_attr before */
3546 sdata->u.mgd.p2p_noa_index = -1;
3547 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3548 changed |= BSS_CHANGED_P2P_PS;
3549 ifmgd->beacon_crc_valid = false;
3550 }
3551 }
3552
3553 if (ifmgd->csa_waiting_bcn)
3554 ieee80211_chswitch_post_beacon(sdata);
3555
3556 /*
3557 * Update beacon timing and dtim count on every beacon appearance. This
3558 * will allow the driver to use the most updated values. Do it before
3559 * comparing this one with last received beacon.
3560 * IMPORTANT: These parameters would possibly be out of sync by the time
3561 * the driver will use them. The synchronized view is currently
3562 * guaranteed only in certain callbacks.
3563 */
3564 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3565 sdata->vif.bss_conf.sync_tsf =
3566 le64_to_cpu(mgmt->u.beacon.timestamp);
3567 sdata->vif.bss_conf.sync_device_ts =
3568 rx_status->device_timestamp;
3569 if (elems.tim)
3570 sdata->vif.bss_conf.sync_dtim_count =
3571 elems.tim->dtim_count;
3572 else
3573 sdata->vif.bss_conf.sync_dtim_count = 0;
3574 }
3575
3576 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3577 return;
3578 ifmgd->beacon_crc = ncrc;
3579 ifmgd->beacon_crc_valid = true;
3580
3581 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3582
3583 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3584 rx_status->device_timestamp,
3585 &elems, true);
3586
3587 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3588 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3589 elems.wmm_param_len))
3590 changed |= BSS_CHANGED_QOS;
3591
3592 /*
3593 * If we haven't had a beacon before, tell the driver about the
3594 * DTIM period (and beacon timing if desired) now.
3595 */
3596 if (!ifmgd->have_beacon) {
3597 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3598 if (elems.tim)
3599 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3600 else
3601 bss_conf->dtim_period = 1;
3602
3603 changed |= BSS_CHANGED_BEACON_INFO;
3604 ifmgd->have_beacon = true;
3605
3606 mutex_lock(&local->iflist_mtx);
3607 ieee80211_recalc_ps(local);
3608 mutex_unlock(&local->iflist_mtx);
3609
3610 ieee80211_recalc_ps_vif(sdata);
3611 }
3612
3613 if (elems.erp_info) {
3614 erp_valid = true;
3615 erp_value = elems.erp_info[0];
3616 } else {
3617 erp_valid = false;
3618 }
3619 changed |= ieee80211_handle_bss_capability(sdata,
3620 le16_to_cpu(mgmt->u.beacon.capab_info),
3621 erp_valid, erp_value);
3622
3623 mutex_lock(&local->sta_mtx);
3624 sta = sta_info_get(sdata, bssid);
3625
3626 if (ieee80211_config_bw(sdata, sta,
3627 elems.ht_cap_elem, elems.ht_operation,
3628 elems.vht_operation, bssid, &changed)) {
3629 mutex_unlock(&local->sta_mtx);
3630 sdata_info(sdata,
3631 "failed to follow AP %pM bandwidth change, disconnect\n",
3632 bssid);
3633 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3634 WLAN_REASON_DEAUTH_LEAVING,
3635 true, deauth_buf);
3636 ieee80211_report_disconnect(sdata, deauth_buf,
3637 sizeof(deauth_buf), true,
3638 WLAN_REASON_DEAUTH_LEAVING);
3639 return;
3640 }
3641
3642 if (sta && elems.opmode_notif)
3643 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3644 rx_status->band);
3645 mutex_unlock(&local->sta_mtx);
3646
3647 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3648 elems.country_elem,
3649 elems.country_elem_len,
3650 elems.pwr_constr_elem,
3651 elems.cisco_dtpc_elem);
3652
3653 ieee80211_bss_info_change_notify(sdata, changed);
3654 }
3655
3656 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3657 struct sk_buff *skb)
3658 {
3659 struct ieee80211_rx_status *rx_status;
3660 struct ieee80211_mgmt *mgmt;
3661 u16 fc;
3662 struct ieee802_11_elems elems;
3663 int ies_len;
3664
3665 rx_status = (struct ieee80211_rx_status *) skb->cb;
3666 mgmt = (struct ieee80211_mgmt *) skb->data;
3667 fc = le16_to_cpu(mgmt->frame_control);
3668
3669 sdata_lock(sdata);
3670
3671 switch (fc & IEEE80211_FCTL_STYPE) {
3672 case IEEE80211_STYPE_BEACON:
3673 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3674 break;
3675 case IEEE80211_STYPE_PROBE_RESP:
3676 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3677 break;
3678 case IEEE80211_STYPE_AUTH:
3679 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3680 break;
3681 case IEEE80211_STYPE_DEAUTH:
3682 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3683 break;
3684 case IEEE80211_STYPE_DISASSOC:
3685 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3686 break;
3687 case IEEE80211_STYPE_ASSOC_RESP:
3688 case IEEE80211_STYPE_REASSOC_RESP:
3689 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3690 break;
3691 case IEEE80211_STYPE_ACTION:
3692 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3693 ies_len = skb->len -
3694 offsetof(struct ieee80211_mgmt,
3695 u.action.u.chan_switch.variable);
3696
3697 if (ies_len < 0)
3698 break;
3699
3700 ieee802_11_parse_elems(
3701 mgmt->u.action.u.chan_switch.variable,
3702 ies_len, true, &elems);
3703
3704 if (elems.parse_error)
3705 break;
3706
3707 ieee80211_sta_process_chanswitch(sdata,
3708 rx_status->mactime,
3709 rx_status->device_timestamp,
3710 &elems, false);
3711 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3712 ies_len = skb->len -
3713 offsetof(struct ieee80211_mgmt,
3714 u.action.u.ext_chan_switch.variable);
3715
3716 if (ies_len < 0)
3717 break;
3718
3719 ieee802_11_parse_elems(
3720 mgmt->u.action.u.ext_chan_switch.variable,
3721 ies_len, true, &elems);
3722
3723 if (elems.parse_error)
3724 break;
3725
3726 /* for the handling code pretend this was also an IE */
3727 elems.ext_chansw_ie =
3728 &mgmt->u.action.u.ext_chan_switch.data;
3729
3730 ieee80211_sta_process_chanswitch(sdata,
3731 rx_status->mactime,
3732 rx_status->device_timestamp,
3733 &elems, false);
3734 }
3735 break;
3736 }
3737 sdata_unlock(sdata);
3738 }
3739
3740 static void ieee80211_sta_timer(unsigned long data)
3741 {
3742 struct ieee80211_sub_if_data *sdata =
3743 (struct ieee80211_sub_if_data *) data;
3744
3745 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3746 }
3747
3748 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3749 u8 *bssid, u8 reason, bool tx)
3750 {
3751 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3752
3753 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3754 tx, frame_buf);
3755
3756 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3757 reason);
3758 }
3759
3760 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3761 {
3762 struct ieee80211_local *local = sdata->local;
3763 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3764 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3765 u32 tx_flags = 0;
3766 u16 trans = 1;
3767 u16 status = 0;
3768
3769 sdata_assert_lock(sdata);
3770
3771 if (WARN_ON_ONCE(!auth_data))
3772 return -EINVAL;
3773
3774 auth_data->tries++;
3775
3776 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3777 sdata_info(sdata, "authentication with %pM timed out\n",
3778 auth_data->bss->bssid);
3779
3780 /*
3781 * Most likely AP is not in the range so remove the
3782 * bss struct for that AP.
3783 */
3784 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3785
3786 return -ETIMEDOUT;
3787 }
3788
3789 drv_mgd_prepare_tx(local, sdata);
3790
3791 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3792 auth_data->bss->bssid, auth_data->tries,
3793 IEEE80211_AUTH_MAX_TRIES);
3794
3795 auth_data->expected_transaction = 2;
3796
3797 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3798 trans = auth_data->sae_trans;
3799 status = auth_data->sae_status;
3800 auth_data->expected_transaction = trans;
3801 }
3802
3803 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3804 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3805 IEEE80211_TX_INTFL_MLME_CONN_TX;
3806
3807 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3808 auth_data->data, auth_data->data_len,
3809 auth_data->bss->bssid,
3810 auth_data->bss->bssid, NULL, 0, 0,
3811 tx_flags);
3812
3813 if (tx_flags == 0) {
3814 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3815 auth_data->timeout_started = true;
3816 run_again(sdata, auth_data->timeout);
3817 } else {
3818 auth_data->timeout =
3819 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3820 auth_data->timeout_started = true;
3821 run_again(sdata, auth_data->timeout);
3822 }
3823
3824 return 0;
3825 }
3826
3827 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3828 {
3829 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3830 struct ieee80211_local *local = sdata->local;
3831
3832 sdata_assert_lock(sdata);
3833
3834 assoc_data->tries++;
3835 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3836 sdata_info(sdata, "association with %pM timed out\n",
3837 assoc_data->bss->bssid);
3838
3839 /*
3840 * Most likely AP is not in the range so remove the
3841 * bss struct for that AP.
3842 */
3843 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3844
3845 return -ETIMEDOUT;
3846 }
3847
3848 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3849 assoc_data->bss->bssid, assoc_data->tries,
3850 IEEE80211_ASSOC_MAX_TRIES);
3851 ieee80211_send_assoc(sdata);
3852
3853 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3854 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3855 assoc_data->timeout_started = true;
3856 run_again(sdata, assoc_data->timeout);
3857 } else {
3858 assoc_data->timeout =
3859 round_jiffies_up(jiffies +
3860 IEEE80211_ASSOC_TIMEOUT_LONG);
3861 assoc_data->timeout_started = true;
3862 run_again(sdata, assoc_data->timeout);
3863 }
3864
3865 return 0;
3866 }
3867
3868 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3869 __le16 fc, bool acked)
3870 {
3871 struct ieee80211_local *local = sdata->local;
3872
3873 sdata->u.mgd.status_fc = fc;
3874 sdata->u.mgd.status_acked = acked;
3875 sdata->u.mgd.status_received = true;
3876
3877 ieee80211_queue_work(&local->hw, &sdata->work);
3878 }
3879
3880 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3881 {
3882 struct ieee80211_local *local = sdata->local;
3883 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3884
3885 sdata_lock(sdata);
3886
3887 if (ifmgd->status_received) {
3888 __le16 fc = ifmgd->status_fc;
3889 bool status_acked = ifmgd->status_acked;
3890
3891 ifmgd->status_received = false;
3892 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3893 if (status_acked) {
3894 ifmgd->auth_data->timeout =
3895 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3896 run_again(sdata, ifmgd->auth_data->timeout);
3897 } else {
3898 ifmgd->auth_data->timeout = jiffies - 1;
3899 }
3900 ifmgd->auth_data->timeout_started = true;
3901 } else if (ifmgd->assoc_data &&
3902 (ieee80211_is_assoc_req(fc) ||
3903 ieee80211_is_reassoc_req(fc))) {
3904 if (status_acked) {
3905 ifmgd->assoc_data->timeout =
3906 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3907 run_again(sdata, ifmgd->assoc_data->timeout);
3908 } else {
3909 ifmgd->assoc_data->timeout = jiffies - 1;
3910 }
3911 ifmgd->assoc_data->timeout_started = true;
3912 }
3913 }
3914
3915 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3916 time_after(jiffies, ifmgd->auth_data->timeout)) {
3917 if (ifmgd->auth_data->done) {
3918 /*
3919 * ok ... we waited for assoc but userspace didn't,
3920 * so let's just kill the auth data
3921 */
3922 ieee80211_destroy_auth_data(sdata, false);
3923 } else if (ieee80211_auth(sdata)) {
3924 u8 bssid[ETH_ALEN];
3925 struct ieee80211_event event = {
3926 .type = MLME_EVENT,
3927 .u.mlme.data = AUTH_EVENT,
3928 .u.mlme.status = MLME_TIMEOUT,
3929 };
3930
3931 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3932
3933 ieee80211_destroy_auth_data(sdata, false);
3934
3935 cfg80211_auth_timeout(sdata->dev, bssid);
3936 drv_event_callback(sdata->local, sdata, &event);
3937 }
3938 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3939 run_again(sdata, ifmgd->auth_data->timeout);
3940
3941 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3942 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3943 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3944 ieee80211_do_assoc(sdata)) {
3945 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3946 struct ieee80211_event event = {
3947 .type = MLME_EVENT,
3948 .u.mlme.data = ASSOC_EVENT,
3949 .u.mlme.status = MLME_TIMEOUT,
3950 };
3951
3952 ieee80211_destroy_assoc_data(sdata, false, false);
3953 cfg80211_assoc_timeout(sdata->dev, bss);
3954 drv_event_callback(sdata->local, sdata, &event);
3955 }
3956 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3957 run_again(sdata, ifmgd->assoc_data->timeout);
3958
3959 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3960 ifmgd->associated) {
3961 u8 bssid[ETH_ALEN];
3962 int max_tries;
3963
3964 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3965
3966 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3967 max_tries = max_nullfunc_tries;
3968 else
3969 max_tries = max_probe_tries;
3970
3971 /* ACK received for nullfunc probing frame */
3972 if (!ifmgd->probe_send_count)
3973 ieee80211_reset_ap_probe(sdata);
3974 else if (ifmgd->nullfunc_failed) {
3975 if (ifmgd->probe_send_count < max_tries) {
3976 mlme_dbg(sdata,
3977 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3978 bssid, ifmgd->probe_send_count,
3979 max_tries);
3980 ieee80211_mgd_probe_ap_send(sdata);
3981 } else {
3982 mlme_dbg(sdata,
3983 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3984 bssid);
3985 ieee80211_sta_connection_lost(sdata, bssid,
3986 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3987 false);
3988 }
3989 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3990 run_again(sdata, ifmgd->probe_timeout);
3991 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3992 mlme_dbg(sdata,
3993 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3994 bssid, probe_wait_ms);
3995 ieee80211_sta_connection_lost(sdata, bssid,
3996 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3997 } else if (ifmgd->probe_send_count < max_tries) {
3998 mlme_dbg(sdata,
3999 "No probe response from AP %pM after %dms, try %d/%i\n",
4000 bssid, probe_wait_ms,
4001 ifmgd->probe_send_count, max_tries);
4002 ieee80211_mgd_probe_ap_send(sdata);
4003 } else {
4004 /*
4005 * We actually lost the connection ... or did we?
4006 * Let's make sure!
4007 */
4008 mlme_dbg(sdata,
4009 "No probe response from AP %pM after %dms, disconnecting.\n",
4010 bssid, probe_wait_ms);
4011
4012 ieee80211_sta_connection_lost(sdata, bssid,
4013 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4014 }
4015 }
4016
4017 sdata_unlock(sdata);
4018 }
4019
4020 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
4021 {
4022 struct ieee80211_sub_if_data *sdata =
4023 (struct ieee80211_sub_if_data *) data;
4024 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4025
4026 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4027 return;
4028
4029 sdata->u.mgd.connection_loss = false;
4030 ieee80211_queue_work(&sdata->local->hw,
4031 &sdata->u.mgd.beacon_connection_loss_work);
4032 }
4033
4034 static void ieee80211_sta_conn_mon_timer(unsigned long data)
4035 {
4036 struct ieee80211_sub_if_data *sdata =
4037 (struct ieee80211_sub_if_data *) data;
4038 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4039 struct ieee80211_local *local = sdata->local;
4040
4041 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4042 return;
4043
4044 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4045 }
4046
4047 static void ieee80211_sta_monitor_work(struct work_struct *work)
4048 {
4049 struct ieee80211_sub_if_data *sdata =
4050 container_of(work, struct ieee80211_sub_if_data,
4051 u.mgd.monitor_work);
4052
4053 ieee80211_mgd_probe_ap(sdata, false);
4054 }
4055
4056 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4057 {
4058 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4059 __ieee80211_stop_poll(sdata);
4060
4061 /* let's probe the connection once */
4062 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4063 ieee80211_queue_work(&sdata->local->hw,
4064 &sdata->u.mgd.monitor_work);
4065 }
4066 }
4067
4068 #ifdef CONFIG_PM
4069 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4070 {
4071 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4072 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4073
4074 sdata_lock(sdata);
4075
4076 if (ifmgd->auth_data || ifmgd->assoc_data) {
4077 const u8 *bssid = ifmgd->auth_data ?
4078 ifmgd->auth_data->bss->bssid :
4079 ifmgd->assoc_data->bss->bssid;
4080
4081 /*
4082 * If we are trying to authenticate / associate while suspending,
4083 * cfg80211 won't know and won't actually abort those attempts,
4084 * thus we need to do that ourselves.
4085 */
4086 ieee80211_send_deauth_disassoc(sdata, bssid,
4087 IEEE80211_STYPE_DEAUTH,
4088 WLAN_REASON_DEAUTH_LEAVING,
4089 false, frame_buf);
4090 if (ifmgd->assoc_data)
4091 ieee80211_destroy_assoc_data(sdata, false, true);
4092 if (ifmgd->auth_data)
4093 ieee80211_destroy_auth_data(sdata, false);
4094 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4095 IEEE80211_DEAUTH_FRAME_LEN);
4096 }
4097
4098 /* This is a bit of a hack - we should find a better and more generic
4099 * solution to this. Normally when suspending, cfg80211 will in fact
4100 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4101 * auth (not so important) or assoc (this is the problem) process.
4102 *
4103 * As a consequence, it can happen that we are in the process of both
4104 * associating and suspending, and receive an association response
4105 * after cfg80211 has checked if it needs to disconnect, but before
4106 * we actually set the flag to drop incoming frames. This will then
4107 * cause the workqueue flush to process the association response in
4108 * the suspend, resulting in a successful association just before it
4109 * tries to remove the interface from the driver, which now though
4110 * has a channel context assigned ... this results in issues.
4111 *
4112 * To work around this (for now) simply deauth here again if we're
4113 * now connected.
4114 */
4115 if (ifmgd->associated && !sdata->local->wowlan) {
4116 u8 bssid[ETH_ALEN];
4117 struct cfg80211_deauth_request req = {
4118 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4119 .bssid = bssid,
4120 };
4121
4122 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4123 ieee80211_mgd_deauth(sdata, &req);
4124 }
4125
4126 sdata_unlock(sdata);
4127 }
4128
4129 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4130 {
4131 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4132
4133 sdata_lock(sdata);
4134 if (!ifmgd->associated) {
4135 sdata_unlock(sdata);
4136 return;
4137 }
4138
4139 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4140 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4141 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4142 ieee80211_sta_connection_lost(sdata,
4143 ifmgd->associated->bssid,
4144 WLAN_REASON_UNSPECIFIED,
4145 true);
4146 sdata_unlock(sdata);
4147 return;
4148 }
4149 sdata_unlock(sdata);
4150 }
4151 #endif
4152
4153 /* interface setup */
4154 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4155 {
4156 struct ieee80211_if_managed *ifmgd;
4157
4158 ifmgd = &sdata->u.mgd;
4159 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4160 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4161 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4162 ieee80211_beacon_connection_loss_work);
4163 INIT_WORK(&ifmgd->csa_connection_drop_work,
4164 ieee80211_csa_connection_drop_work);
4165 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4166 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4167 ieee80211_tdls_peer_del_work);
4168 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4169 (unsigned long) sdata);
4170 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4171 (unsigned long) sdata);
4172 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4173 (unsigned long) sdata);
4174 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4175 (unsigned long) sdata);
4176 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4177 ieee80211_sta_handle_tspec_ac_params_wk);
4178
4179 ifmgd->flags = 0;
4180 ifmgd->powersave = sdata->wdev.ps;
4181 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4182 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4183 ifmgd->p2p_noa_index = -1;
4184
4185 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4186 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4187 else
4188 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4189
4190 /* Setup TDLS data */
4191 spin_lock_init(&ifmgd->teardown_lock);
4192 ifmgd->teardown_skb = NULL;
4193 ifmgd->orig_teardown_skb = NULL;
4194 }
4195
4196 /* scan finished notification */
4197 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4198 {
4199 struct ieee80211_sub_if_data *sdata;
4200
4201 /* Restart STA timers */
4202 rcu_read_lock();
4203 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4204 if (ieee80211_sdata_running(sdata))
4205 ieee80211_restart_sta_timer(sdata);
4206 }
4207 rcu_read_unlock();
4208 }
4209
4210 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4211 struct cfg80211_bss *cbss)
4212 {
4213 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4214 const u8 *ht_cap_ie, *vht_cap_ie;
4215 const struct ieee80211_ht_cap *ht_cap;
4216 const struct ieee80211_vht_cap *vht_cap;
4217 u8 chains = 1;
4218
4219 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4220 return chains;
4221
4222 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4223 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4224 ht_cap = (void *)(ht_cap_ie + 2);
4225 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4226 /*
4227 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4228 * "Tx Unequal Modulation Supported" fields.
4229 */
4230 }
4231
4232 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4233 return chains;
4234
4235 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4236 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4237 u8 nss;
4238 u16 tx_mcs_map;
4239
4240 vht_cap = (void *)(vht_cap_ie + 2);
4241 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4242 for (nss = 8; nss > 0; nss--) {
4243 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4244 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4245 break;
4246 }
4247 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4248 chains = max(chains, nss);
4249 }
4250
4251 return chains;
4252 }
4253
4254 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4255 struct cfg80211_bss *cbss)
4256 {
4257 struct ieee80211_local *local = sdata->local;
4258 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4259 const struct ieee80211_ht_cap *ht_cap = NULL;
4260 const struct ieee80211_ht_operation *ht_oper = NULL;
4261 const struct ieee80211_vht_operation *vht_oper = NULL;
4262 struct ieee80211_supported_band *sband;
4263 struct cfg80211_chan_def chandef;
4264 int ret;
4265 u32 i;
4266 bool have_80mhz;
4267
4268 sband = local->hw.wiphy->bands[cbss->channel->band];
4269
4270 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4271 IEEE80211_STA_DISABLE_80P80MHZ |
4272 IEEE80211_STA_DISABLE_160MHZ);
4273
4274 rcu_read_lock();
4275
4276 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4277 sband->ht_cap.ht_supported) {
4278 const u8 *ht_oper_ie, *ht_cap_ie;
4279
4280 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4281 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4282 ht_oper = (void *)(ht_oper_ie + 2);
4283
4284 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4285 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4286 ht_cap = (void *)(ht_cap_ie + 2);
4287
4288 if (!ht_cap) {
4289 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4290 ht_oper = NULL;
4291 }
4292 }
4293
4294 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4295 sband->vht_cap.vht_supported) {
4296 const u8 *vht_oper_ie, *vht_cap;
4297
4298 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4299 WLAN_EID_VHT_OPERATION);
4300 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4301 vht_oper = (void *)(vht_oper_ie + 2);
4302 if (vht_oper && !ht_oper) {
4303 vht_oper = NULL;
4304 sdata_info(sdata,
4305 "AP advertised VHT without HT, disabling both\n");
4306 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4307 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4308 }
4309
4310 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4311 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4312 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4313 vht_oper = NULL;
4314 }
4315 }
4316
4317 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4318 have_80mhz = false;
4319 for (i = 0; i < sband->n_channels; i++) {
4320 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4321 IEEE80211_CHAN_NO_80MHZ))
4322 continue;
4323
4324 have_80mhz = true;
4325 break;
4326 }
4327
4328 if (!have_80mhz)
4329 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4330
4331 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4332 cbss->channel,
4333 ht_cap, ht_oper, vht_oper,
4334 &chandef, false);
4335
4336 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4337 local->rx_chains);
4338
4339 rcu_read_unlock();
4340
4341 /* will change later if needed */
4342 sdata->smps_mode = IEEE80211_SMPS_OFF;
4343
4344 mutex_lock(&local->mtx);
4345 /*
4346 * If this fails (possibly due to channel context sharing
4347 * on incompatible channels, e.g. 80+80 and 160 sharing the
4348 * same control channel) try to use a smaller bandwidth.
4349 */
4350 ret = ieee80211_vif_use_channel(sdata, &chandef,
4351 IEEE80211_CHANCTX_SHARED);
4352
4353 /* don't downgrade for 5 and 10 MHz channels, though. */
4354 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4355 chandef.width == NL80211_CHAN_WIDTH_10)
4356 goto out;
4357
4358 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4359 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4360 ret = ieee80211_vif_use_channel(sdata, &chandef,
4361 IEEE80211_CHANCTX_SHARED);
4362 }
4363 out:
4364 mutex_unlock(&local->mtx);
4365 return ret;
4366 }
4367
4368 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4369 struct cfg80211_bss *cbss, bool assoc,
4370 bool override)
4371 {
4372 struct ieee80211_local *local = sdata->local;
4373 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4374 struct ieee80211_bss *bss = (void *)cbss->priv;
4375 struct sta_info *new_sta = NULL;
4376 struct ieee80211_supported_band *sband;
4377 bool have_sta = false;
4378 int err;
4379
4380 sband = local->hw.wiphy->bands[cbss->channel->band];
4381
4382 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4383 return -EINVAL;
4384
4385 /* If a reconfig is happening, bail out */
4386 if (local->in_reconfig)
4387 return -EBUSY;
4388
4389 if (assoc) {
4390 rcu_read_lock();
4391 have_sta = sta_info_get(sdata, cbss->bssid);
4392 rcu_read_unlock();
4393 }
4394
4395 if (!have_sta) {
4396 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4397 if (!new_sta)
4398 return -ENOMEM;
4399 }
4400
4401 if (new_sta || override) {
4402 err = ieee80211_prep_channel(sdata, cbss);
4403 if (err) {
4404 if (new_sta)
4405 sta_info_free(local, new_sta);
4406 return -EINVAL;
4407 }
4408 }
4409
4410 if (new_sta) {
4411 u32 rates = 0, basic_rates = 0;
4412 bool have_higher_than_11mbit;
4413 int min_rate = INT_MAX, min_rate_index = -1;
4414 struct ieee80211_chanctx_conf *chanctx_conf;
4415 const struct cfg80211_bss_ies *ies;
4416 int shift = ieee80211_vif_get_shift(&sdata->vif);
4417 u32 rate_flags;
4418
4419 rcu_read_lock();
4420 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4421 if (WARN_ON(!chanctx_conf)) {
4422 rcu_read_unlock();
4423 sta_info_free(local, new_sta);
4424 return -EINVAL;
4425 }
4426 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4427 rcu_read_unlock();
4428
4429 ieee80211_get_rates(sband, bss->supp_rates,
4430 bss->supp_rates_len,
4431 &rates, &basic_rates,
4432 &have_higher_than_11mbit,
4433 &min_rate, &min_rate_index,
4434 shift, rate_flags);
4435
4436 /*
4437 * This used to be a workaround for basic rates missing
4438 * in the association response frame. Now that we no
4439 * longer use the basic rates from there, it probably
4440 * doesn't happen any more, but keep the workaround so
4441 * in case some *other* APs are buggy in different ways
4442 * we can connect -- with a warning.
4443 */
4444 if (!basic_rates && min_rate_index >= 0) {
4445 sdata_info(sdata,
4446 "No basic rates, using min rate instead\n");
4447 basic_rates = BIT(min_rate_index);
4448 }
4449
4450 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4451 sdata->vif.bss_conf.basic_rates = basic_rates;
4452
4453 /* cf. IEEE 802.11 9.2.12 */
4454 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4455 have_higher_than_11mbit)
4456 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4457 else
4458 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4459
4460 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4461
4462 /* set timing information */
4463 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4464 rcu_read_lock();
4465 ies = rcu_dereference(cbss->beacon_ies);
4466 if (ies) {
4467 const u8 *tim_ie;
4468
4469 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4470 sdata->vif.bss_conf.sync_device_ts =
4471 bss->device_ts_beacon;
4472 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4473 ies->data, ies->len);
4474 if (tim_ie && tim_ie[1] >= 2)
4475 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4476 else
4477 sdata->vif.bss_conf.sync_dtim_count = 0;
4478 } else if (!ieee80211_hw_check(&sdata->local->hw,
4479 TIMING_BEACON_ONLY)) {
4480 ies = rcu_dereference(cbss->proberesp_ies);
4481 /* must be non-NULL since beacon IEs were NULL */
4482 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4483 sdata->vif.bss_conf.sync_device_ts =
4484 bss->device_ts_presp;
4485 sdata->vif.bss_conf.sync_dtim_count = 0;
4486 } else {
4487 sdata->vif.bss_conf.sync_tsf = 0;
4488 sdata->vif.bss_conf.sync_device_ts = 0;
4489 sdata->vif.bss_conf.sync_dtim_count = 0;
4490 }
4491 rcu_read_unlock();
4492
4493 /* tell driver about BSSID, basic rates and timing */
4494 ieee80211_bss_info_change_notify(sdata,
4495 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4496 BSS_CHANGED_BEACON_INT);
4497
4498 if (assoc)
4499 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4500
4501 err = sta_info_insert(new_sta);
4502 new_sta = NULL;
4503 if (err) {
4504 sdata_info(sdata,
4505 "failed to insert STA entry for the AP (error %d)\n",
4506 err);
4507 return err;
4508 }
4509 } else
4510 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4511
4512 /* Cancel scan to ensure that nothing interferes with connection */
4513 if (local->scanning)
4514 ieee80211_scan_cancel(local);
4515
4516 return 0;
4517 }
4518
4519 /* config hooks */
4520 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4521 struct cfg80211_auth_request *req)
4522 {
4523 struct ieee80211_local *local = sdata->local;
4524 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4525 struct ieee80211_mgd_auth_data *auth_data;
4526 u16 auth_alg;
4527 int err;
4528
4529 /* prepare auth data structure */
4530
4531 switch (req->auth_type) {
4532 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4533 auth_alg = WLAN_AUTH_OPEN;
4534 break;
4535 case NL80211_AUTHTYPE_SHARED_KEY:
4536 if (IS_ERR(local->wep_tx_tfm))
4537 return -EOPNOTSUPP;
4538 auth_alg = WLAN_AUTH_SHARED_KEY;
4539 break;
4540 case NL80211_AUTHTYPE_FT:
4541 auth_alg = WLAN_AUTH_FT;
4542 break;
4543 case NL80211_AUTHTYPE_NETWORK_EAP:
4544 auth_alg = WLAN_AUTH_LEAP;
4545 break;
4546 case NL80211_AUTHTYPE_SAE:
4547 auth_alg = WLAN_AUTH_SAE;
4548 break;
4549 case NL80211_AUTHTYPE_FILS_SK:
4550 auth_alg = WLAN_AUTH_FILS_SK;
4551 break;
4552 case NL80211_AUTHTYPE_FILS_SK_PFS:
4553 auth_alg = WLAN_AUTH_FILS_SK_PFS;
4554 break;
4555 case NL80211_AUTHTYPE_FILS_PK:
4556 auth_alg = WLAN_AUTH_FILS_PK;
4557 break;
4558 default:
4559 return -EOPNOTSUPP;
4560 }
4561
4562 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
4563 req->ie_len, GFP_KERNEL);
4564 if (!auth_data)
4565 return -ENOMEM;
4566
4567 auth_data->bss = req->bss;
4568
4569 if (req->auth_data_len >= 4) {
4570 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
4571 __le16 *pos = (__le16 *) req->auth_data;
4572
4573 auth_data->sae_trans = le16_to_cpu(pos[0]);
4574 auth_data->sae_status = le16_to_cpu(pos[1]);
4575 }
4576 memcpy(auth_data->data, req->auth_data + 4,
4577 req->auth_data_len - 4);
4578 auth_data->data_len += req->auth_data_len - 4;
4579 }
4580
4581 if (req->ie && req->ie_len) {
4582 memcpy(&auth_data->data[auth_data->data_len],
4583 req->ie, req->ie_len);
4584 auth_data->data_len += req->ie_len;
4585 }
4586
4587 if (req->key && req->key_len) {
4588 auth_data->key_len = req->key_len;
4589 auth_data->key_idx = req->key_idx;
4590 memcpy(auth_data->key, req->key, req->key_len);
4591 }
4592
4593 auth_data->algorithm = auth_alg;
4594
4595 /* try to authenticate/probe */
4596
4597 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4598 ifmgd->assoc_data) {
4599 err = -EBUSY;
4600 goto err_free;
4601 }
4602
4603 if (ifmgd->auth_data)
4604 ieee80211_destroy_auth_data(sdata, false);
4605
4606 /* prep auth_data so we don't go into idle on disassoc */
4607 ifmgd->auth_data = auth_data;
4608
4609 if (ifmgd->associated) {
4610 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4611
4612 sdata_info(sdata,
4613 "disconnect from AP %pM for new auth to %pM\n",
4614 ifmgd->associated->bssid, req->bss->bssid);
4615 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4616 WLAN_REASON_UNSPECIFIED,
4617 false, frame_buf);
4618
4619 ieee80211_report_disconnect(sdata, frame_buf,
4620 sizeof(frame_buf), true,
4621 WLAN_REASON_UNSPECIFIED);
4622 }
4623
4624 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4625
4626 err = ieee80211_prep_connection(sdata, req->bss, false, false);
4627 if (err)
4628 goto err_clear;
4629
4630 err = ieee80211_auth(sdata);
4631 if (err) {
4632 sta_info_destroy_addr(sdata, req->bss->bssid);
4633 goto err_clear;
4634 }
4635
4636 /* hold our own reference */
4637 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4638 return 0;
4639
4640 err_clear:
4641 eth_zero_addr(ifmgd->bssid);
4642 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4643 ifmgd->auth_data = NULL;
4644 mutex_lock(&sdata->local->mtx);
4645 ieee80211_vif_release_channel(sdata);
4646 mutex_unlock(&sdata->local->mtx);
4647 err_free:
4648 kfree(auth_data);
4649 return err;
4650 }
4651
4652 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4653 struct cfg80211_assoc_request *req)
4654 {
4655 struct ieee80211_local *local = sdata->local;
4656 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4657 struct ieee80211_bss *bss = (void *)req->bss->priv;
4658 struct ieee80211_mgd_assoc_data *assoc_data;
4659 const struct cfg80211_bss_ies *beacon_ies;
4660 struct ieee80211_supported_band *sband;
4661 const u8 *ssidie, *ht_ie, *vht_ie;
4662 int i, err;
4663 bool override = false;
4664
4665 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4666 if (!assoc_data)
4667 return -ENOMEM;
4668
4669 rcu_read_lock();
4670 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4671 if (!ssidie) {
4672 rcu_read_unlock();
4673 kfree(assoc_data);
4674 return -EINVAL;
4675 }
4676 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4677 assoc_data->ssid_len = ssidie[1];
4678 rcu_read_unlock();
4679
4680 if (ifmgd->associated) {
4681 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4682
4683 sdata_info(sdata,
4684 "disconnect from AP %pM for new assoc to %pM\n",
4685 ifmgd->associated->bssid, req->bss->bssid);
4686 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4687 WLAN_REASON_UNSPECIFIED,
4688 false, frame_buf);
4689
4690 ieee80211_report_disconnect(sdata, frame_buf,
4691 sizeof(frame_buf), true,
4692 WLAN_REASON_UNSPECIFIED);
4693 }
4694
4695 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4696 err = -EBUSY;
4697 goto err_free;
4698 }
4699
4700 if (ifmgd->assoc_data) {
4701 err = -EBUSY;
4702 goto err_free;
4703 }
4704
4705 if (ifmgd->auth_data) {
4706 bool match;
4707
4708 /* keep sta info, bssid if matching */
4709 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4710 ieee80211_destroy_auth_data(sdata, match);
4711 }
4712
4713 /* prepare assoc data */
4714
4715 ifmgd->beacon_crc_valid = false;
4716
4717 assoc_data->wmm = bss->wmm_used &&
4718 (local->hw.queues >= IEEE80211_NUM_ACS);
4719
4720 /*
4721 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4722 * We still associate in non-HT mode (11a/b/g) if any one of these
4723 * ciphers is configured as pairwise.
4724 * We can set this to true for non-11n hardware, that'll be checked
4725 * separately along with the peer capabilities.
4726 */
4727 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4728 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4729 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4730 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4731 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4732 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4733 netdev_info(sdata->dev,
4734 "disabling HT/VHT due to WEP/TKIP use\n");
4735 }
4736 }
4737
4738 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4739 sband = local->hw.wiphy->bands[req->bss->channel->band];
4740 if (!sband->ht_cap.ht_supported ||
4741 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4742 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4743 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4744 if (!bss->wmm_used &&
4745 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4746 netdev_info(sdata->dev,
4747 "disabling HT as WMM/QoS is not supported by the AP\n");
4748 }
4749
4750 /* disable VHT if we don't support it or the AP doesn't use WMM */
4751 if (!sband->vht_cap.vht_supported ||
4752 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4753 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4754 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4755 if (!bss->wmm_used &&
4756 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4757 netdev_info(sdata->dev,
4758 "disabling VHT as WMM/QoS is not supported by the AP\n");
4759 }
4760
4761 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4762 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4763 sizeof(ifmgd->ht_capa_mask));
4764
4765 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4766 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4767 sizeof(ifmgd->vht_capa_mask));
4768
4769 if (req->ie && req->ie_len) {
4770 memcpy(assoc_data->ie, req->ie, req->ie_len);
4771 assoc_data->ie_len = req->ie_len;
4772 }
4773
4774 if (req->fils_kek) {
4775 /* should already be checked in cfg80211 - so warn */
4776 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
4777 err = -EINVAL;
4778 goto err_free;
4779 }
4780 memcpy(assoc_data->fils_kek, req->fils_kek,
4781 req->fils_kek_len);
4782 assoc_data->fils_kek_len = req->fils_kek_len;
4783 }
4784
4785 if (req->fils_nonces)
4786 memcpy(assoc_data->fils_nonces, req->fils_nonces,
4787 2 * FILS_NONCE_LEN);
4788
4789 assoc_data->bss = req->bss;
4790
4791 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4792 if (ifmgd->powersave)
4793 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4794 else
4795 sdata->smps_mode = IEEE80211_SMPS_OFF;
4796 } else
4797 sdata->smps_mode = ifmgd->req_smps;
4798
4799 assoc_data->capability = req->bss->capability;
4800 assoc_data->supp_rates = bss->supp_rates;
4801 assoc_data->supp_rates_len = bss->supp_rates_len;
4802
4803 rcu_read_lock();
4804 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4805 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4806 assoc_data->ap_ht_param =
4807 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4808 else
4809 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4810 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4811 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4812 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4813 sizeof(struct ieee80211_vht_cap));
4814 else
4815 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4816 rcu_read_unlock();
4817
4818 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4819 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4820 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4821 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4822
4823 if (bss->wmm_used && bss->uapsd_supported &&
4824 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4825 assoc_data->uapsd = true;
4826 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4827 } else {
4828 assoc_data->uapsd = false;
4829 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4830 }
4831
4832 if (req->prev_bssid)
4833 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4834
4835 if (req->use_mfp) {
4836 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4837 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4838 } else {
4839 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4840 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4841 }
4842
4843 if (req->flags & ASSOC_REQ_USE_RRM)
4844 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4845 else
4846 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4847
4848 if (req->crypto.control_port)
4849 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4850 else
4851 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4852
4853 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4854 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4855 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4856 sdata->vif.type);
4857
4858 /* kick off associate process */
4859
4860 ifmgd->assoc_data = assoc_data;
4861 ifmgd->dtim_period = 0;
4862 ifmgd->have_beacon = false;
4863
4864 /* override HT/VHT configuration only if the AP and we support it */
4865 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4866 struct ieee80211_sta_ht_cap sta_ht_cap;
4867
4868 if (req->flags & ASSOC_REQ_DISABLE_HT)
4869 override = true;
4870
4871 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4872 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4873
4874 /* check for 40 MHz disable override */
4875 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4876 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4877 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4878 override = true;
4879
4880 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4881 req->flags & ASSOC_REQ_DISABLE_VHT)
4882 override = true;
4883 }
4884
4885 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4886 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4887 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4888 }
4889
4890 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4891 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4892
4893 err = ieee80211_prep_connection(sdata, req->bss, true, override);
4894 if (err)
4895 goto err_clear;
4896
4897 rcu_read_lock();
4898 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4899
4900 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4901 !beacon_ies) {
4902 /*
4903 * Wait up to one beacon interval ...
4904 * should this be more if we miss one?
4905 */
4906 sdata_info(sdata, "waiting for beacon from %pM\n",
4907 ifmgd->bssid);
4908 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4909 assoc_data->timeout_started = true;
4910 assoc_data->need_beacon = true;
4911 } else if (beacon_ies) {
4912 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4913 beacon_ies->data,
4914 beacon_ies->len);
4915 u8 dtim_count = 0;
4916
4917 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4918 const struct ieee80211_tim_ie *tim;
4919 tim = (void *)(tim_ie + 2);
4920 ifmgd->dtim_period = tim->dtim_period;
4921 dtim_count = tim->dtim_count;
4922 }
4923 ifmgd->have_beacon = true;
4924 assoc_data->timeout = jiffies;
4925 assoc_data->timeout_started = true;
4926
4927 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4928 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4929 sdata->vif.bss_conf.sync_device_ts =
4930 bss->device_ts_beacon;
4931 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4932 }
4933 } else {
4934 assoc_data->timeout = jiffies;
4935 assoc_data->timeout_started = true;
4936 }
4937 rcu_read_unlock();
4938
4939 run_again(sdata, assoc_data->timeout);
4940
4941 if (bss->corrupt_data) {
4942 char *corrupt_type = "data";
4943 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4944 if (bss->corrupt_data &
4945 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4946 corrupt_type = "beacon and probe response";
4947 else
4948 corrupt_type = "beacon";
4949 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4950 corrupt_type = "probe response";
4951 sdata_info(sdata, "associating with AP with corrupt %s\n",
4952 corrupt_type);
4953 }
4954
4955 return 0;
4956 err_clear:
4957 eth_zero_addr(ifmgd->bssid);
4958 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4959 ifmgd->assoc_data = NULL;
4960 err_free:
4961 kfree(assoc_data);
4962 return err;
4963 }
4964
4965 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4966 struct cfg80211_deauth_request *req)
4967 {
4968 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4969 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4970 bool tx = !req->local_state_change;
4971
4972 if (ifmgd->auth_data &&
4973 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4974 sdata_info(sdata,
4975 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4976 req->bssid, req->reason_code,
4977 ieee80211_get_reason_code_string(req->reason_code));
4978
4979 drv_mgd_prepare_tx(sdata->local, sdata);
4980 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4981 IEEE80211_STYPE_DEAUTH,
4982 req->reason_code, tx,
4983 frame_buf);
4984 ieee80211_destroy_auth_data(sdata, false);
4985 ieee80211_report_disconnect(sdata, frame_buf,
4986 sizeof(frame_buf), true,
4987 req->reason_code);
4988
4989 return 0;
4990 }
4991
4992 if (ifmgd->assoc_data &&
4993 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4994 sdata_info(sdata,
4995 "aborting association with %pM by local choice (Reason: %u=%s)\n",
4996 req->bssid, req->reason_code,
4997 ieee80211_get_reason_code_string(req->reason_code));
4998
4999 drv_mgd_prepare_tx(sdata->local, sdata);
5000 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5001 IEEE80211_STYPE_DEAUTH,
5002 req->reason_code, tx,
5003 frame_buf);
5004 ieee80211_destroy_assoc_data(sdata, false, true);
5005 ieee80211_report_disconnect(sdata, frame_buf,
5006 sizeof(frame_buf), true,
5007 req->reason_code);
5008 return 0;
5009 }
5010
5011 if (ifmgd->associated &&
5012 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5013 sdata_info(sdata,
5014 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5015 req->bssid, req->reason_code,
5016 ieee80211_get_reason_code_string(req->reason_code));
5017
5018 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5019 req->reason_code, tx, frame_buf);
5020 ieee80211_report_disconnect(sdata, frame_buf,
5021 sizeof(frame_buf), true,
5022 req->reason_code);
5023 return 0;
5024 }
5025
5026 return -ENOTCONN;
5027 }
5028
5029 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5030 struct cfg80211_disassoc_request *req)
5031 {
5032 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5033 u8 bssid[ETH_ALEN];
5034 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5035
5036 /*
5037 * cfg80211 should catch this ... but it's racy since
5038 * we can receive a disassoc frame, process it, hand it
5039 * to cfg80211 while that's in a locked section already
5040 * trying to tell us that the user wants to disconnect.
5041 */
5042 if (ifmgd->associated != req->bss)
5043 return -ENOLINK;
5044
5045 sdata_info(sdata,
5046 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5047 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5048
5049 memcpy(bssid, req->bss->bssid, ETH_ALEN);
5050 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5051 req->reason_code, !req->local_state_change,
5052 frame_buf);
5053
5054 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5055 req->reason_code);
5056
5057 return 0;
5058 }
5059
5060 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5061 {
5062 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5063
5064 /*
5065 * Make sure some work items will not run after this,
5066 * they will not do anything but might not have been
5067 * cancelled when disconnecting.
5068 */
5069 cancel_work_sync(&ifmgd->monitor_work);
5070 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5071 cancel_work_sync(&ifmgd->request_smps_work);
5072 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5073 cancel_work_sync(&ifmgd->chswitch_work);
5074 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5075
5076 sdata_lock(sdata);
5077 if (ifmgd->assoc_data) {
5078 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5079 ieee80211_destroy_assoc_data(sdata, false, false);
5080 cfg80211_assoc_timeout(sdata->dev, bss);
5081 }
5082 if (ifmgd->auth_data)
5083 ieee80211_destroy_auth_data(sdata, false);
5084 spin_lock_bh(&ifmgd->teardown_lock);
5085 if (ifmgd->teardown_skb) {
5086 kfree_skb(ifmgd->teardown_skb);
5087 ifmgd->teardown_skb = NULL;
5088 ifmgd->orig_teardown_skb = NULL;
5089 }
5090 spin_unlock_bh(&ifmgd->teardown_lock);
5091 del_timer_sync(&ifmgd->timer);
5092 sdata_unlock(sdata);
5093 }
5094
5095 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5096 enum nl80211_cqm_rssi_threshold_event rssi_event,
5097 s32 rssi_level,
5098 gfp_t gfp)
5099 {
5100 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5101
5102 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5103
5104 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5105 }
5106 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5107
5108 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5109 {
5110 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5111
5112 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5113
5114 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5115 }
5116 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
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