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Merge branch 'bind_unbind' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
[GitHub/LineageOS/android_kernel_motorola_exynos9610.git] / net / mac80211 / mlme.c
1 /*
2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 * 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 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 rcu_read_unlock();
616 sband = local->hw.wiphy->bands[chan->band];
617 shift = ieee80211_vif_get_shift(&sdata->vif);
618
619 if (assoc_data->supp_rates_len) {
620 /*
621 * Get all rates supported by the device and the AP as
622 * some APs don't like getting a superset of their rates
623 * in the association request (e.g. D-Link DAP 1353 in
624 * b-only mode)...
625 */
626 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
627 assoc_data->supp_rates,
628 assoc_data->supp_rates_len,
629 &rates);
630 } else {
631 /*
632 * In case AP not provide any supported rates information
633 * before association, we send information element(s) with
634 * all rates that we support.
635 */
636 rates_len = 0;
637 for (i = 0; i < sband->n_bitrates; i++) {
638 rates |= BIT(i);
639 rates_len++;
640 }
641 }
642
643 skb = alloc_skb(local->hw.extra_tx_headroom +
644 sizeof(*mgmt) + /* bit too much but doesn't matter */
645 2 + assoc_data->ssid_len + /* SSID */
646 4 + rates_len + /* (extended) rates */
647 4 + /* power capability */
648 2 + 2 * sband->n_channels + /* supported channels */
649 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
650 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
651 assoc_data->ie_len + /* extra IEs */
652 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
653 9, /* WMM */
654 GFP_KERNEL);
655 if (!skb)
656 return;
657
658 skb_reserve(skb, local->hw.extra_tx_headroom);
659
660 capab = WLAN_CAPABILITY_ESS;
661
662 if (sband->band == NL80211_BAND_2GHZ) {
663 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
664 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
665 }
666
667 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
668 capab |= WLAN_CAPABILITY_PRIVACY;
669
670 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
671 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
672 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
673
674 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
675 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
676
677 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
678 memset(mgmt, 0, 24);
679 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
680 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
681 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
682
683 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
684 skb_put(skb, 10);
685 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
686 IEEE80211_STYPE_REASSOC_REQ);
687 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
688 mgmt->u.reassoc_req.listen_interval =
689 cpu_to_le16(local->hw.conf.listen_interval);
690 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
691 ETH_ALEN);
692 } else {
693 skb_put(skb, 4);
694 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
695 IEEE80211_STYPE_ASSOC_REQ);
696 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
697 mgmt->u.assoc_req.listen_interval =
698 cpu_to_le16(local->hw.conf.listen_interval);
699 }
700
701 /* SSID */
702 pos = skb_put(skb, 2 + assoc_data->ssid_len);
703 *pos++ = WLAN_EID_SSID;
704 *pos++ = assoc_data->ssid_len;
705 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
706
707 /* add all rates which were marked to be used above */
708 supp_rates_len = rates_len;
709 if (supp_rates_len > 8)
710 supp_rates_len = 8;
711
712 pos = skb_put(skb, supp_rates_len + 2);
713 *pos++ = WLAN_EID_SUPP_RATES;
714 *pos++ = supp_rates_len;
715
716 count = 0;
717 for (i = 0; i < sband->n_bitrates; i++) {
718 if (BIT(i) & rates) {
719 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
720 5 * (1 << shift));
721 *pos++ = (u8) rate;
722 if (++count == 8)
723 break;
724 }
725 }
726
727 if (rates_len > count) {
728 pos = skb_put(skb, rates_len - count + 2);
729 *pos++ = WLAN_EID_EXT_SUPP_RATES;
730 *pos++ = rates_len - count;
731
732 for (i++; i < sband->n_bitrates; i++) {
733 if (BIT(i) & rates) {
734 int rate;
735 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
736 5 * (1 << shift));
737 *pos++ = (u8) rate;
738 }
739 }
740 }
741
742 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
743 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
744 pos = skb_put(skb, 4);
745 *pos++ = WLAN_EID_PWR_CAPABILITY;
746 *pos++ = 2;
747 *pos++ = 0; /* min tx power */
748 /* max tx power */
749 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
750 }
751
752 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
753 /* TODO: get this in reg domain format */
754 pos = skb_put(skb, 2 * sband->n_channels + 2);
755 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
756 *pos++ = 2 * sband->n_channels;
757 for (i = 0; i < sband->n_channels; i++) {
758 *pos++ = ieee80211_frequency_to_channel(
759 sband->channels[i].center_freq);
760 *pos++ = 1; /* one channel in the subband*/
761 }
762 }
763
764 /* if present, add any custom IEs that go before HT */
765 if (assoc_data->ie_len) {
766 static const u8 before_ht[] = {
767 WLAN_EID_SSID,
768 WLAN_EID_SUPP_RATES,
769 WLAN_EID_EXT_SUPP_RATES,
770 WLAN_EID_PWR_CAPABILITY,
771 WLAN_EID_SUPPORTED_CHANNELS,
772 WLAN_EID_RSN,
773 WLAN_EID_QOS_CAPA,
774 WLAN_EID_RRM_ENABLED_CAPABILITIES,
775 WLAN_EID_MOBILITY_DOMAIN,
776 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
777 WLAN_EID_RIC_DATA, /* reassoc only */
778 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
779 };
780 static const u8 after_ric[] = {
781 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
782 WLAN_EID_HT_CAPABILITY,
783 WLAN_EID_BSS_COEX_2040,
784 WLAN_EID_EXT_CAPABILITY,
785 WLAN_EID_QOS_TRAFFIC_CAPA,
786 WLAN_EID_TIM_BCAST_REQ,
787 WLAN_EID_INTERWORKING,
788 /* 60GHz doesn't happen right now */
789 WLAN_EID_VHT_CAPABILITY,
790 WLAN_EID_OPMODE_NOTIF,
791 };
792
793 noffset = ieee80211_ie_split_ric(assoc_data->ie,
794 assoc_data->ie_len,
795 before_ht,
796 ARRAY_SIZE(before_ht),
797 after_ric,
798 ARRAY_SIZE(after_ric),
799 offset);
800 pos = skb_put(skb, noffset - offset);
801 memcpy(pos, assoc_data->ie + offset, noffset - offset);
802 offset = noffset;
803 }
804
805 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
806 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
807 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
808
809 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
810 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
811 sband, chan, sdata->smps_mode);
812
813 /* if present, add any custom IEs that go before VHT */
814 if (assoc_data->ie_len) {
815 static const u8 before_vht[] = {
816 WLAN_EID_SSID,
817 WLAN_EID_SUPP_RATES,
818 WLAN_EID_EXT_SUPP_RATES,
819 WLAN_EID_PWR_CAPABILITY,
820 WLAN_EID_SUPPORTED_CHANNELS,
821 WLAN_EID_RSN,
822 WLAN_EID_QOS_CAPA,
823 WLAN_EID_RRM_ENABLED_CAPABILITIES,
824 WLAN_EID_MOBILITY_DOMAIN,
825 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
826 WLAN_EID_HT_CAPABILITY,
827 WLAN_EID_BSS_COEX_2040,
828 WLAN_EID_EXT_CAPABILITY,
829 WLAN_EID_QOS_TRAFFIC_CAPA,
830 WLAN_EID_TIM_BCAST_REQ,
831 WLAN_EID_INTERWORKING,
832 };
833
834 /* RIC already taken above, so no need to handle here anymore */
835 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
836 before_vht, ARRAY_SIZE(before_vht),
837 offset);
838 pos = skb_put(skb, noffset - offset);
839 memcpy(pos, assoc_data->ie + offset, noffset - offset);
840 offset = noffset;
841 }
842
843 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
844 ieee80211_add_vht_ie(sdata, skb, sband,
845 &assoc_data->ap_vht_cap);
846
847 /* if present, add any custom non-vendor IEs that go after HT */
848 if (assoc_data->ie_len) {
849 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
850 assoc_data->ie_len,
851 offset);
852 pos = skb_put(skb, noffset - offset);
853 memcpy(pos, assoc_data->ie + offset, noffset - offset);
854 offset = noffset;
855 }
856
857 if (assoc_data->wmm) {
858 if (assoc_data->uapsd) {
859 qos_info = ifmgd->uapsd_queues;
860 qos_info |= (ifmgd->uapsd_max_sp_len <<
861 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
862 } else {
863 qos_info = 0;
864 }
865
866 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
867 }
868
869 /* add any remaining custom (i.e. vendor specific here) IEs */
870 if (assoc_data->ie_len) {
871 noffset = assoc_data->ie_len;
872 pos = skb_put(skb, noffset - offset);
873 memcpy(pos, assoc_data->ie + offset, noffset - offset);
874 }
875
876 if (assoc_data->fils_kek_len &&
877 fils_encrypt_assoc_req(skb, assoc_data) < 0) {
878 dev_kfree_skb(skb);
879 return;
880 }
881
882 drv_mgd_prepare_tx(local, sdata);
883
884 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
885 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
886 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
887 IEEE80211_TX_INTFL_MLME_CONN_TX;
888 ieee80211_tx_skb(sdata, skb);
889 }
890
891 void ieee80211_send_pspoll(struct ieee80211_local *local,
892 struct ieee80211_sub_if_data *sdata)
893 {
894 struct ieee80211_pspoll *pspoll;
895 struct sk_buff *skb;
896
897 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
898 if (!skb)
899 return;
900
901 pspoll = (struct ieee80211_pspoll *) skb->data;
902 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
903
904 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
905 ieee80211_tx_skb(sdata, skb);
906 }
907
908 void ieee80211_send_nullfunc(struct ieee80211_local *local,
909 struct ieee80211_sub_if_data *sdata,
910 bool powersave)
911 {
912 struct sk_buff *skb;
913 struct ieee80211_hdr_3addr *nullfunc;
914 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
915
916 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
917 if (!skb)
918 return;
919
920 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
921 if (powersave)
922 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
923
924 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
925 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
926
927 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
928 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
929
930 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
931 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
932
933 ieee80211_tx_skb(sdata, skb);
934 }
935
936 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
937 struct ieee80211_sub_if_data *sdata)
938 {
939 struct sk_buff *skb;
940 struct ieee80211_hdr *nullfunc;
941 __le16 fc;
942
943 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
944 return;
945
946 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
947 if (!skb)
948 return;
949
950 skb_reserve(skb, local->hw.extra_tx_headroom);
951
952 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
953 memset(nullfunc, 0, 30);
954 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
955 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
956 nullfunc->frame_control = fc;
957 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
958 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
959 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
960 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
961
962 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
963 ieee80211_tx_skb(sdata, skb);
964 }
965
966 /* spectrum management related things */
967 static void ieee80211_chswitch_work(struct work_struct *work)
968 {
969 struct ieee80211_sub_if_data *sdata =
970 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
971 struct ieee80211_local *local = sdata->local;
972 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
973 int ret;
974
975 if (!ieee80211_sdata_running(sdata))
976 return;
977
978 sdata_lock(sdata);
979 mutex_lock(&local->mtx);
980 mutex_lock(&local->chanctx_mtx);
981
982 if (!ifmgd->associated)
983 goto out;
984
985 if (!sdata->vif.csa_active)
986 goto out;
987
988 /*
989 * using reservation isn't immediate as it may be deferred until later
990 * with multi-vif. once reservation is complete it will re-schedule the
991 * work with no reserved_chanctx so verify chandef to check if it
992 * completed successfully
993 */
994
995 if (sdata->reserved_chanctx) {
996 /*
997 * with multi-vif csa driver may call ieee80211_csa_finish()
998 * many times while waiting for other interfaces to use their
999 * reservations
1000 */
1001 if (sdata->reserved_ready)
1002 goto out;
1003
1004 ret = ieee80211_vif_use_reserved_context(sdata);
1005 if (ret) {
1006 sdata_info(sdata,
1007 "failed to use reserved channel context, disconnecting (err=%d)\n",
1008 ret);
1009 ieee80211_queue_work(&sdata->local->hw,
1010 &ifmgd->csa_connection_drop_work);
1011 goto out;
1012 }
1013
1014 goto out;
1015 }
1016
1017 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1018 &sdata->csa_chandef)) {
1019 sdata_info(sdata,
1020 "failed to finalize channel switch, disconnecting\n");
1021 ieee80211_queue_work(&sdata->local->hw,
1022 &ifmgd->csa_connection_drop_work);
1023 goto out;
1024 }
1025
1026 /* XXX: shouldn't really modify cfg80211-owned data! */
1027 ifmgd->associated->channel = sdata->csa_chandef.chan;
1028
1029 ifmgd->csa_waiting_bcn = true;
1030
1031 ieee80211_sta_reset_beacon_monitor(sdata);
1032 ieee80211_sta_reset_conn_monitor(sdata);
1033
1034 out:
1035 mutex_unlock(&local->chanctx_mtx);
1036 mutex_unlock(&local->mtx);
1037 sdata_unlock(sdata);
1038 }
1039
1040 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1041 {
1042 struct ieee80211_local *local = sdata->local;
1043 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1044 int ret;
1045
1046 sdata_assert_lock(sdata);
1047
1048 WARN_ON(!sdata->vif.csa_active);
1049
1050 if (sdata->csa_block_tx) {
1051 ieee80211_wake_vif_queues(local, sdata,
1052 IEEE80211_QUEUE_STOP_REASON_CSA);
1053 sdata->csa_block_tx = false;
1054 }
1055
1056 sdata->vif.csa_active = false;
1057 ifmgd->csa_waiting_bcn = false;
1058
1059 ret = drv_post_channel_switch(sdata);
1060 if (ret) {
1061 sdata_info(sdata,
1062 "driver post channel switch failed, disconnecting\n");
1063 ieee80211_queue_work(&local->hw,
1064 &ifmgd->csa_connection_drop_work);
1065 return;
1066 }
1067
1068 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1069 }
1070
1071 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1072 {
1073 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1074 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1075
1076 trace_api_chswitch_done(sdata, success);
1077 if (!success) {
1078 sdata_info(sdata,
1079 "driver channel switch failed, disconnecting\n");
1080 ieee80211_queue_work(&sdata->local->hw,
1081 &ifmgd->csa_connection_drop_work);
1082 } else {
1083 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1084 }
1085 }
1086 EXPORT_SYMBOL(ieee80211_chswitch_done);
1087
1088 static void ieee80211_chswitch_timer(unsigned long data)
1089 {
1090 struct ieee80211_sub_if_data *sdata =
1091 (struct ieee80211_sub_if_data *) data;
1092
1093 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1094 }
1095
1096 static void
1097 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1098 u64 timestamp, u32 device_timestamp,
1099 struct ieee802_11_elems *elems,
1100 bool beacon)
1101 {
1102 struct ieee80211_local *local = sdata->local;
1103 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1104 struct cfg80211_bss *cbss = ifmgd->associated;
1105 struct ieee80211_chanctx_conf *conf;
1106 struct ieee80211_chanctx *chanctx;
1107 enum nl80211_band current_band;
1108 struct ieee80211_csa_ie csa_ie;
1109 struct ieee80211_channel_switch ch_switch;
1110 int res;
1111
1112 sdata_assert_lock(sdata);
1113
1114 if (!cbss)
1115 return;
1116
1117 if (local->scanning)
1118 return;
1119
1120 /* disregard subsequent announcements if we are already processing */
1121 if (sdata->vif.csa_active)
1122 return;
1123
1124 current_band = cbss->channel->band;
1125 memset(&csa_ie, 0, sizeof(csa_ie));
1126 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1127 ifmgd->flags,
1128 ifmgd->associated->bssid, &csa_ie);
1129 if (res < 0)
1130 ieee80211_queue_work(&local->hw,
1131 &ifmgd->csa_connection_drop_work);
1132 if (res)
1133 return;
1134
1135 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1136 IEEE80211_CHAN_DISABLED)) {
1137 sdata_info(sdata,
1138 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1139 ifmgd->associated->bssid,
1140 csa_ie.chandef.chan->center_freq,
1141 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1142 csa_ie.chandef.center_freq2);
1143 ieee80211_queue_work(&local->hw,
1144 &ifmgd->csa_connection_drop_work);
1145 return;
1146 }
1147
1148 if (cfg80211_chandef_identical(&csa_ie.chandef,
1149 &sdata->vif.bss_conf.chandef)) {
1150 if (ifmgd->csa_ignored_same_chan)
1151 return;
1152 sdata_info(sdata,
1153 "AP %pM tries to chanswitch to same channel, ignore\n",
1154 ifmgd->associated->bssid);
1155 ifmgd->csa_ignored_same_chan = true;
1156 return;
1157 }
1158
1159 /*
1160 * Drop all TDLS peers - either we disconnect or move to a different
1161 * channel from this point on. There's no telling what our peer will do.
1162 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1163 * have an incompatible wider chandef.
1164 */
1165 ieee80211_teardown_tdls_peers(sdata);
1166
1167 mutex_lock(&local->mtx);
1168 mutex_lock(&local->chanctx_mtx);
1169 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1170 lockdep_is_held(&local->chanctx_mtx));
1171 if (!conf) {
1172 sdata_info(sdata,
1173 "no channel context assigned to vif?, disconnecting\n");
1174 goto drop_connection;
1175 }
1176
1177 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1178
1179 if (local->use_chanctx &&
1180 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1181 sdata_info(sdata,
1182 "driver doesn't support chan-switch with channel contexts\n");
1183 goto drop_connection;
1184 }
1185
1186 ch_switch.timestamp = timestamp;
1187 ch_switch.device_timestamp = device_timestamp;
1188 ch_switch.block_tx = csa_ie.mode;
1189 ch_switch.chandef = csa_ie.chandef;
1190 ch_switch.count = csa_ie.count;
1191
1192 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1193 sdata_info(sdata,
1194 "preparing for channel switch failed, disconnecting\n");
1195 goto drop_connection;
1196 }
1197
1198 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1199 chanctx->mode, false);
1200 if (res) {
1201 sdata_info(sdata,
1202 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1203 res);
1204 goto drop_connection;
1205 }
1206 mutex_unlock(&local->chanctx_mtx);
1207
1208 sdata->vif.csa_active = true;
1209 sdata->csa_chandef = csa_ie.chandef;
1210 sdata->csa_block_tx = csa_ie.mode;
1211 ifmgd->csa_ignored_same_chan = false;
1212
1213 if (sdata->csa_block_tx)
1214 ieee80211_stop_vif_queues(local, sdata,
1215 IEEE80211_QUEUE_STOP_REASON_CSA);
1216 mutex_unlock(&local->mtx);
1217
1218 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1219 csa_ie.count);
1220
1221 if (local->ops->channel_switch) {
1222 /* use driver's channel switch callback */
1223 drv_channel_switch(local, sdata, &ch_switch);
1224 return;
1225 }
1226
1227 /* channel switch handled in software */
1228 if (csa_ie.count <= 1)
1229 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1230 else
1231 mod_timer(&ifmgd->chswitch_timer,
1232 TU_TO_EXP_TIME((csa_ie.count - 1) *
1233 cbss->beacon_interval));
1234 return;
1235 drop_connection:
1236 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1237 mutex_unlock(&local->chanctx_mtx);
1238 mutex_unlock(&local->mtx);
1239 }
1240
1241 static bool
1242 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1243 struct ieee80211_channel *channel,
1244 const u8 *country_ie, u8 country_ie_len,
1245 const u8 *pwr_constr_elem,
1246 int *chan_pwr, int *pwr_reduction)
1247 {
1248 struct ieee80211_country_ie_triplet *triplet;
1249 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1250 int i, chan_increment;
1251 bool have_chan_pwr = false;
1252
1253 /* Invalid IE */
1254 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1255 return false;
1256
1257 triplet = (void *)(country_ie + 3);
1258 country_ie_len -= 3;
1259
1260 switch (channel->band) {
1261 default:
1262 WARN_ON_ONCE(1);
1263 /* fall through */
1264 case NL80211_BAND_2GHZ:
1265 case NL80211_BAND_60GHZ:
1266 chan_increment = 1;
1267 break;
1268 case NL80211_BAND_5GHZ:
1269 chan_increment = 4;
1270 break;
1271 }
1272
1273 /* find channel */
1274 while (country_ie_len >= 3) {
1275 u8 first_channel = triplet->chans.first_channel;
1276
1277 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1278 goto next;
1279
1280 for (i = 0; i < triplet->chans.num_channels; i++) {
1281 if (first_channel + i * chan_increment == chan) {
1282 have_chan_pwr = true;
1283 *chan_pwr = triplet->chans.max_power;
1284 break;
1285 }
1286 }
1287 if (have_chan_pwr)
1288 break;
1289
1290 next:
1291 triplet++;
1292 country_ie_len -= 3;
1293 }
1294
1295 if (have_chan_pwr && pwr_constr_elem)
1296 *pwr_reduction = *pwr_constr_elem;
1297 else
1298 *pwr_reduction = 0;
1299
1300 return have_chan_pwr;
1301 }
1302
1303 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1304 struct ieee80211_channel *channel,
1305 const u8 *cisco_dtpc_ie,
1306 int *pwr_level)
1307 {
1308 /* From practical testing, the first data byte of the DTPC element
1309 * seems to contain the requested dBm level, and the CLI on Cisco
1310 * APs clearly state the range is -127 to 127 dBm, which indicates
1311 * a signed byte, although it seemingly never actually goes negative.
1312 * The other byte seems to always be zero.
1313 */
1314 *pwr_level = (__s8)cisco_dtpc_ie[4];
1315 }
1316
1317 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1318 struct ieee80211_channel *channel,
1319 struct ieee80211_mgmt *mgmt,
1320 const u8 *country_ie, u8 country_ie_len,
1321 const u8 *pwr_constr_ie,
1322 const u8 *cisco_dtpc_ie)
1323 {
1324 bool has_80211h_pwr = false, has_cisco_pwr = false;
1325 int chan_pwr = 0, pwr_reduction_80211h = 0;
1326 int pwr_level_cisco, pwr_level_80211h;
1327 int new_ap_level;
1328 __le16 capab = mgmt->u.probe_resp.capab_info;
1329
1330 if (country_ie &&
1331 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1332 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1333 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1334 sdata, channel, country_ie, country_ie_len,
1335 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1336 pwr_level_80211h =
1337 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1338 }
1339
1340 if (cisco_dtpc_ie) {
1341 ieee80211_find_cisco_dtpc(
1342 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1343 has_cisco_pwr = true;
1344 }
1345
1346 if (!has_80211h_pwr && !has_cisco_pwr)
1347 return 0;
1348
1349 /* If we have both 802.11h and Cisco DTPC, apply both limits
1350 * by picking the smallest of the two power levels advertised.
1351 */
1352 if (has_80211h_pwr &&
1353 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1354 new_ap_level = pwr_level_80211h;
1355
1356 if (sdata->ap_power_level == new_ap_level)
1357 return 0;
1358
1359 sdata_dbg(sdata,
1360 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1361 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1362 sdata->u.mgd.bssid);
1363 } else { /* has_cisco_pwr is always true here. */
1364 new_ap_level = pwr_level_cisco;
1365
1366 if (sdata->ap_power_level == new_ap_level)
1367 return 0;
1368
1369 sdata_dbg(sdata,
1370 "Limiting TX power to %d dBm as advertised by %pM\n",
1371 pwr_level_cisco, sdata->u.mgd.bssid);
1372 }
1373
1374 sdata->ap_power_level = new_ap_level;
1375 if (__ieee80211_recalc_txpower(sdata))
1376 return BSS_CHANGED_TXPOWER;
1377 return 0;
1378 }
1379
1380 /* powersave */
1381 static void ieee80211_enable_ps(struct ieee80211_local *local,
1382 struct ieee80211_sub_if_data *sdata)
1383 {
1384 struct ieee80211_conf *conf = &local->hw.conf;
1385
1386 /*
1387 * If we are scanning right now then the parameters will
1388 * take effect when scan finishes.
1389 */
1390 if (local->scanning)
1391 return;
1392
1393 if (conf->dynamic_ps_timeout > 0 &&
1394 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1395 mod_timer(&local->dynamic_ps_timer, jiffies +
1396 msecs_to_jiffies(conf->dynamic_ps_timeout));
1397 } else {
1398 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1399 ieee80211_send_nullfunc(local, sdata, true);
1400
1401 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1402 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1403 return;
1404
1405 conf->flags |= IEEE80211_CONF_PS;
1406 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1407 }
1408 }
1409
1410 static void ieee80211_change_ps(struct ieee80211_local *local)
1411 {
1412 struct ieee80211_conf *conf = &local->hw.conf;
1413
1414 if (local->ps_sdata) {
1415 ieee80211_enable_ps(local, local->ps_sdata);
1416 } else if (conf->flags & IEEE80211_CONF_PS) {
1417 conf->flags &= ~IEEE80211_CONF_PS;
1418 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1419 del_timer_sync(&local->dynamic_ps_timer);
1420 cancel_work_sync(&local->dynamic_ps_enable_work);
1421 }
1422 }
1423
1424 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1425 {
1426 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1427 struct sta_info *sta = NULL;
1428 bool authorized = false;
1429
1430 if (!mgd->powersave)
1431 return false;
1432
1433 if (mgd->broken_ap)
1434 return false;
1435
1436 if (!mgd->associated)
1437 return false;
1438
1439 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1440 return false;
1441
1442 if (!mgd->have_beacon)
1443 return false;
1444
1445 rcu_read_lock();
1446 sta = sta_info_get(sdata, mgd->bssid);
1447 if (sta)
1448 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1449 rcu_read_unlock();
1450
1451 return authorized;
1452 }
1453
1454 /* need to hold RTNL or interface lock */
1455 void ieee80211_recalc_ps(struct ieee80211_local *local)
1456 {
1457 struct ieee80211_sub_if_data *sdata, *found = NULL;
1458 int count = 0;
1459 int timeout;
1460
1461 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1462 local->ps_sdata = NULL;
1463 return;
1464 }
1465
1466 list_for_each_entry(sdata, &local->interfaces, list) {
1467 if (!ieee80211_sdata_running(sdata))
1468 continue;
1469 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1470 /* If an AP vif is found, then disable PS
1471 * by setting the count to zero thereby setting
1472 * ps_sdata to NULL.
1473 */
1474 count = 0;
1475 break;
1476 }
1477 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1478 continue;
1479 found = sdata;
1480 count++;
1481 }
1482
1483 if (count == 1 && ieee80211_powersave_allowed(found)) {
1484 u8 dtimper = found->u.mgd.dtim_period;
1485
1486 timeout = local->dynamic_ps_forced_timeout;
1487 if (timeout < 0)
1488 timeout = 100;
1489 local->hw.conf.dynamic_ps_timeout = timeout;
1490
1491 /* If the TIM IE is invalid, pretend the value is 1 */
1492 if (!dtimper)
1493 dtimper = 1;
1494
1495 local->hw.conf.ps_dtim_period = dtimper;
1496 local->ps_sdata = found;
1497 } else {
1498 local->ps_sdata = NULL;
1499 }
1500
1501 ieee80211_change_ps(local);
1502 }
1503
1504 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1505 {
1506 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1507
1508 if (sdata->vif.bss_conf.ps != ps_allowed) {
1509 sdata->vif.bss_conf.ps = ps_allowed;
1510 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1511 }
1512 }
1513
1514 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1515 {
1516 struct ieee80211_local *local =
1517 container_of(work, struct ieee80211_local,
1518 dynamic_ps_disable_work);
1519
1520 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1521 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1522 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1523 }
1524
1525 ieee80211_wake_queues_by_reason(&local->hw,
1526 IEEE80211_MAX_QUEUE_MAP,
1527 IEEE80211_QUEUE_STOP_REASON_PS,
1528 false);
1529 }
1530
1531 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1532 {
1533 struct ieee80211_local *local =
1534 container_of(work, struct ieee80211_local,
1535 dynamic_ps_enable_work);
1536 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1537 struct ieee80211_if_managed *ifmgd;
1538 unsigned long flags;
1539 int q;
1540
1541 /* can only happen when PS was just disabled anyway */
1542 if (!sdata)
1543 return;
1544
1545 ifmgd = &sdata->u.mgd;
1546
1547 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1548 return;
1549
1550 if (local->hw.conf.dynamic_ps_timeout > 0) {
1551 /* don't enter PS if TX frames are pending */
1552 if (drv_tx_frames_pending(local)) {
1553 mod_timer(&local->dynamic_ps_timer, jiffies +
1554 msecs_to_jiffies(
1555 local->hw.conf.dynamic_ps_timeout));
1556 return;
1557 }
1558
1559 /*
1560 * transmission can be stopped by others which leads to
1561 * dynamic_ps_timer expiry. Postpone the ps timer if it
1562 * is not the actual idle state.
1563 */
1564 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1565 for (q = 0; q < local->hw.queues; q++) {
1566 if (local->queue_stop_reasons[q]) {
1567 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1568 flags);
1569 mod_timer(&local->dynamic_ps_timer, jiffies +
1570 msecs_to_jiffies(
1571 local->hw.conf.dynamic_ps_timeout));
1572 return;
1573 }
1574 }
1575 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1576 }
1577
1578 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1579 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1580 if (drv_tx_frames_pending(local)) {
1581 mod_timer(&local->dynamic_ps_timer, jiffies +
1582 msecs_to_jiffies(
1583 local->hw.conf.dynamic_ps_timeout));
1584 } else {
1585 ieee80211_send_nullfunc(local, sdata, true);
1586 /* Flush to get the tx status of nullfunc frame */
1587 ieee80211_flush_queues(local, sdata, false);
1588 }
1589 }
1590
1591 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1592 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1593 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1594 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1595 local->hw.conf.flags |= IEEE80211_CONF_PS;
1596 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1597 }
1598 }
1599
1600 void ieee80211_dynamic_ps_timer(unsigned long data)
1601 {
1602 struct ieee80211_local *local = (void *) data;
1603
1604 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1605 }
1606
1607 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1608 {
1609 struct delayed_work *delayed_work = to_delayed_work(work);
1610 struct ieee80211_sub_if_data *sdata =
1611 container_of(delayed_work, struct ieee80211_sub_if_data,
1612 dfs_cac_timer_work);
1613 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1614
1615 mutex_lock(&sdata->local->mtx);
1616 if (sdata->wdev.cac_started) {
1617 ieee80211_vif_release_channel(sdata);
1618 cfg80211_cac_event(sdata->dev, &chandef,
1619 NL80211_RADAR_CAC_FINISHED,
1620 GFP_KERNEL);
1621 }
1622 mutex_unlock(&sdata->local->mtx);
1623 }
1624
1625 static bool
1626 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1627 {
1628 struct ieee80211_local *local = sdata->local;
1629 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1630 bool ret = false;
1631 int ac;
1632
1633 if (local->hw.queues < IEEE80211_NUM_ACS)
1634 return false;
1635
1636 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1637 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1638 int non_acm_ac;
1639 unsigned long now = jiffies;
1640
1641 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1642 tx_tspec->admitted_time &&
1643 time_after(now, tx_tspec->time_slice_start + HZ)) {
1644 tx_tspec->consumed_tx_time = 0;
1645 tx_tspec->time_slice_start = now;
1646
1647 if (tx_tspec->downgraded)
1648 tx_tspec->action =
1649 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1650 }
1651
1652 switch (tx_tspec->action) {
1653 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1654 /* take the original parameters */
1655 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1656 sdata_err(sdata,
1657 "failed to set TX queue parameters for queue %d\n",
1658 ac);
1659 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1660 tx_tspec->downgraded = false;
1661 ret = true;
1662 break;
1663 case TX_TSPEC_ACTION_DOWNGRADE:
1664 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1665 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1666 ret = true;
1667 break;
1668 }
1669 /* downgrade next lower non-ACM AC */
1670 for (non_acm_ac = ac + 1;
1671 non_acm_ac < IEEE80211_NUM_ACS;
1672 non_acm_ac++)
1673 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1674 break;
1675 /* Usually the loop will result in using BK even if it
1676 * requires admission control, but such a configuration
1677 * makes no sense and we have to transmit somehow - the
1678 * AC selection does the same thing.
1679 * If we started out trying to downgrade from BK, then
1680 * the extra condition here might be needed.
1681 */
1682 if (non_acm_ac >= IEEE80211_NUM_ACS)
1683 non_acm_ac = IEEE80211_AC_BK;
1684 if (drv_conf_tx(local, sdata, ac,
1685 &sdata->tx_conf[non_acm_ac]))
1686 sdata_err(sdata,
1687 "failed to set TX queue parameters for queue %d\n",
1688 ac);
1689 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1690 ret = true;
1691 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1692 tx_tspec->time_slice_start + HZ - now + 1);
1693 break;
1694 case TX_TSPEC_ACTION_NONE:
1695 /* nothing now */
1696 break;
1697 }
1698 }
1699
1700 return ret;
1701 }
1702
1703 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1704 {
1705 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1706 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1707 }
1708
1709 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1710 {
1711 struct ieee80211_sub_if_data *sdata;
1712
1713 sdata = container_of(work, struct ieee80211_sub_if_data,
1714 u.mgd.tx_tspec_wk.work);
1715 ieee80211_sta_handle_tspec_ac_params(sdata);
1716 }
1717
1718 /* MLME */
1719 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1720 struct ieee80211_sub_if_data *sdata,
1721 const u8 *wmm_param, size_t wmm_param_len)
1722 {
1723 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1724 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1725 size_t left;
1726 int count, ac;
1727 const u8 *pos;
1728 u8 uapsd_queues = 0;
1729
1730 if (!local->ops->conf_tx)
1731 return false;
1732
1733 if (local->hw.queues < IEEE80211_NUM_ACS)
1734 return false;
1735
1736 if (!wmm_param)
1737 return false;
1738
1739 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1740 return false;
1741
1742 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1743 uapsd_queues = ifmgd->uapsd_queues;
1744
1745 count = wmm_param[6] & 0x0f;
1746 if (count == ifmgd->wmm_last_param_set)
1747 return false;
1748 ifmgd->wmm_last_param_set = count;
1749
1750 pos = wmm_param + 8;
1751 left = wmm_param_len - 8;
1752
1753 memset(&params, 0, sizeof(params));
1754
1755 sdata->wmm_acm = 0;
1756 for (; left >= 4; left -= 4, pos += 4) {
1757 int aci = (pos[0] >> 5) & 0x03;
1758 int acm = (pos[0] >> 4) & 0x01;
1759 bool uapsd = false;
1760
1761 switch (aci) {
1762 case 1: /* AC_BK */
1763 ac = IEEE80211_AC_BK;
1764 if (acm)
1765 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1766 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1767 uapsd = true;
1768 break;
1769 case 2: /* AC_VI */
1770 ac = IEEE80211_AC_VI;
1771 if (acm)
1772 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1773 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1774 uapsd = true;
1775 break;
1776 case 3: /* AC_VO */
1777 ac = IEEE80211_AC_VO;
1778 if (acm)
1779 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1780 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1781 uapsd = true;
1782 break;
1783 case 0: /* AC_BE */
1784 default:
1785 ac = IEEE80211_AC_BE;
1786 if (acm)
1787 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1788 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1789 uapsd = true;
1790 break;
1791 }
1792
1793 params[ac].aifs = pos[0] & 0x0f;
1794
1795 if (params[ac].aifs < 2) {
1796 sdata_info(sdata,
1797 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1798 params[ac].aifs, aci);
1799 params[ac].aifs = 2;
1800 }
1801 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1802 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1803 params[ac].txop = get_unaligned_le16(pos + 2);
1804 params[ac].acm = acm;
1805 params[ac].uapsd = uapsd;
1806
1807 if (params[ac].cw_min > params[ac].cw_max) {
1808 sdata_info(sdata,
1809 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1810 params[ac].cw_min, params[ac].cw_max, aci);
1811 return false;
1812 }
1813 }
1814
1815 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1816 mlme_dbg(sdata,
1817 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1818 ac, params[ac].acm,
1819 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1820 params[ac].txop, params[ac].uapsd,
1821 ifmgd->tx_tspec[ac].downgraded);
1822 sdata->tx_conf[ac] = params[ac];
1823 if (!ifmgd->tx_tspec[ac].downgraded &&
1824 drv_conf_tx(local, sdata, ac, &params[ac]))
1825 sdata_err(sdata,
1826 "failed to set TX queue parameters for AC %d\n",
1827 ac);
1828 }
1829
1830 /* enable WMM or activate new settings */
1831 sdata->vif.bss_conf.qos = true;
1832 return true;
1833 }
1834
1835 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1836 {
1837 lockdep_assert_held(&sdata->local->mtx);
1838
1839 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1840 ieee80211_run_deferred_scan(sdata->local);
1841 }
1842
1843 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1844 {
1845 mutex_lock(&sdata->local->mtx);
1846 __ieee80211_stop_poll(sdata);
1847 mutex_unlock(&sdata->local->mtx);
1848 }
1849
1850 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1851 u16 capab, bool erp_valid, u8 erp)
1852 {
1853 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1854 struct ieee80211_supported_band *sband;
1855 u32 changed = 0;
1856 bool use_protection;
1857 bool use_short_preamble;
1858 bool use_short_slot;
1859
1860 sband = ieee80211_get_sband(sdata);
1861 if (!sband)
1862 return changed;
1863
1864 if (erp_valid) {
1865 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1866 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1867 } else {
1868 use_protection = false;
1869 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1870 }
1871
1872 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1873 if (sband->band == NL80211_BAND_5GHZ)
1874 use_short_slot = true;
1875
1876 if (use_protection != bss_conf->use_cts_prot) {
1877 bss_conf->use_cts_prot = use_protection;
1878 changed |= BSS_CHANGED_ERP_CTS_PROT;
1879 }
1880
1881 if (use_short_preamble != bss_conf->use_short_preamble) {
1882 bss_conf->use_short_preamble = use_short_preamble;
1883 changed |= BSS_CHANGED_ERP_PREAMBLE;
1884 }
1885
1886 if (use_short_slot != bss_conf->use_short_slot) {
1887 bss_conf->use_short_slot = use_short_slot;
1888 changed |= BSS_CHANGED_ERP_SLOT;
1889 }
1890
1891 return changed;
1892 }
1893
1894 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1895 struct cfg80211_bss *cbss,
1896 u32 bss_info_changed)
1897 {
1898 struct ieee80211_bss *bss = (void *)cbss->priv;
1899 struct ieee80211_local *local = sdata->local;
1900 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1901
1902 bss_info_changed |= BSS_CHANGED_ASSOC;
1903 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1904 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1905
1906 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1907 beacon_loss_count * bss_conf->beacon_int));
1908
1909 sdata->u.mgd.associated = cbss;
1910 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1911
1912 ieee80211_check_rate_mask(sdata);
1913
1914 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1915
1916 if (sdata->vif.p2p ||
1917 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
1918 const struct cfg80211_bss_ies *ies;
1919
1920 rcu_read_lock();
1921 ies = rcu_dereference(cbss->ies);
1922 if (ies) {
1923 int ret;
1924
1925 ret = cfg80211_get_p2p_attr(
1926 ies->data, ies->len,
1927 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1928 (u8 *) &bss_conf->p2p_noa_attr,
1929 sizeof(bss_conf->p2p_noa_attr));
1930 if (ret >= 2) {
1931 sdata->u.mgd.p2p_noa_index =
1932 bss_conf->p2p_noa_attr.index;
1933 bss_info_changed |= BSS_CHANGED_P2P_PS;
1934 }
1935 }
1936 rcu_read_unlock();
1937 }
1938
1939 /* just to be sure */
1940 ieee80211_stop_poll(sdata);
1941
1942 ieee80211_led_assoc(local, 1);
1943
1944 if (sdata->u.mgd.have_beacon) {
1945 /*
1946 * If the AP is buggy we may get here with no DTIM period
1947 * known, so assume it's 1 which is the only safe assumption
1948 * in that case, although if the TIM IE is broken powersave
1949 * probably just won't work at all.
1950 */
1951 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1952 bss_conf->beacon_rate = bss->beacon_rate;
1953 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1954 } else {
1955 bss_conf->beacon_rate = NULL;
1956 bss_conf->dtim_period = 0;
1957 }
1958
1959 bss_conf->assoc = 1;
1960
1961 /* Tell the driver to monitor connection quality (if supported) */
1962 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1963 bss_conf->cqm_rssi_thold)
1964 bss_info_changed |= BSS_CHANGED_CQM;
1965
1966 /* Enable ARP filtering */
1967 if (bss_conf->arp_addr_cnt)
1968 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1969
1970 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1971
1972 mutex_lock(&local->iflist_mtx);
1973 ieee80211_recalc_ps(local);
1974 mutex_unlock(&local->iflist_mtx);
1975
1976 ieee80211_recalc_smps(sdata);
1977 ieee80211_recalc_ps_vif(sdata);
1978
1979 netif_carrier_on(sdata->dev);
1980 }
1981
1982 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1983 u16 stype, u16 reason, bool tx,
1984 u8 *frame_buf)
1985 {
1986 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1987 struct ieee80211_local *local = sdata->local;
1988 u32 changed = 0;
1989
1990 sdata_assert_lock(sdata);
1991
1992 if (WARN_ON_ONCE(tx && !frame_buf))
1993 return;
1994
1995 if (WARN_ON(!ifmgd->associated))
1996 return;
1997
1998 ieee80211_stop_poll(sdata);
1999
2000 ifmgd->associated = NULL;
2001 netif_carrier_off(sdata->dev);
2002
2003 /*
2004 * if we want to get out of ps before disassoc (why?) we have
2005 * to do it before sending disassoc, as otherwise the null-packet
2006 * won't be valid.
2007 */
2008 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2009 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2010 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2011 }
2012 local->ps_sdata = NULL;
2013
2014 /* disable per-vif ps */
2015 ieee80211_recalc_ps_vif(sdata);
2016
2017 /* make sure ongoing transmission finishes */
2018 synchronize_net();
2019
2020 /*
2021 * drop any frame before deauth/disassoc, this can be data or
2022 * management frame. Since we are disconnecting, we should not
2023 * insist sending these frames which can take time and delay
2024 * the disconnection and possible the roaming.
2025 */
2026 if (tx)
2027 ieee80211_flush_queues(local, sdata, true);
2028
2029 /* deauthenticate/disassociate now */
2030 if (tx || frame_buf)
2031 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2032 reason, tx, frame_buf);
2033
2034 /* flush out frame - make sure the deauth was actually sent */
2035 if (tx)
2036 ieee80211_flush_queues(local, sdata, false);
2037
2038 /* clear bssid only after building the needed mgmt frames */
2039 eth_zero_addr(ifmgd->bssid);
2040
2041 /* remove AP and TDLS peers */
2042 sta_info_flush(sdata);
2043
2044 /* finally reset all BSS / config parameters */
2045 changed |= ieee80211_reset_erp_info(sdata);
2046
2047 ieee80211_led_assoc(local, 0);
2048 changed |= BSS_CHANGED_ASSOC;
2049 sdata->vif.bss_conf.assoc = false;
2050
2051 ifmgd->p2p_noa_index = -1;
2052 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2053 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2054
2055 /* on the next assoc, re-program HT/VHT parameters */
2056 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2057 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2058 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2059 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2060
2061 /* reset MU-MIMO ownership and group data */
2062 memset(sdata->vif.bss_conf.mu_group.membership, 0,
2063 sizeof(sdata->vif.bss_conf.mu_group.membership));
2064 memset(sdata->vif.bss_conf.mu_group.position, 0,
2065 sizeof(sdata->vif.bss_conf.mu_group.position));
2066 changed |= BSS_CHANGED_MU_GROUPS;
2067 sdata->vif.mu_mimo_owner = false;
2068
2069 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2070
2071 del_timer_sync(&local->dynamic_ps_timer);
2072 cancel_work_sync(&local->dynamic_ps_enable_work);
2073
2074 /* Disable ARP filtering */
2075 if (sdata->vif.bss_conf.arp_addr_cnt)
2076 changed |= BSS_CHANGED_ARP_FILTER;
2077
2078 sdata->vif.bss_conf.qos = false;
2079 changed |= BSS_CHANGED_QOS;
2080
2081 /* The BSSID (not really interesting) and HT changed */
2082 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2083 ieee80211_bss_info_change_notify(sdata, changed);
2084
2085 /* disassociated - set to defaults now */
2086 ieee80211_set_wmm_default(sdata, false, false);
2087
2088 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2089 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2090 del_timer_sync(&sdata->u.mgd.timer);
2091 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2092
2093 sdata->vif.bss_conf.dtim_period = 0;
2094 sdata->vif.bss_conf.beacon_rate = NULL;
2095
2096 ifmgd->have_beacon = false;
2097
2098 ifmgd->flags = 0;
2099 mutex_lock(&local->mtx);
2100 ieee80211_vif_release_channel(sdata);
2101
2102 sdata->vif.csa_active = false;
2103 ifmgd->csa_waiting_bcn = false;
2104 ifmgd->csa_ignored_same_chan = false;
2105 if (sdata->csa_block_tx) {
2106 ieee80211_wake_vif_queues(local, sdata,
2107 IEEE80211_QUEUE_STOP_REASON_CSA);
2108 sdata->csa_block_tx = false;
2109 }
2110 mutex_unlock(&local->mtx);
2111
2112 /* existing TX TSPEC sessions no longer exist */
2113 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2114 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2115
2116 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2117 }
2118
2119 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2120 struct ieee80211_hdr *hdr)
2121 {
2122 /*
2123 * We can postpone the mgd.timer whenever receiving unicast frames
2124 * from AP because we know that the connection is working both ways
2125 * at that time. But multicast frames (and hence also beacons) must
2126 * be ignored here, because we need to trigger the timer during
2127 * data idle periods for sending the periodic probe request to the
2128 * AP we're connected to.
2129 */
2130 if (is_multicast_ether_addr(hdr->addr1))
2131 return;
2132
2133 ieee80211_sta_reset_conn_monitor(sdata);
2134 }
2135
2136 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2137 {
2138 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2139 struct ieee80211_local *local = sdata->local;
2140
2141 mutex_lock(&local->mtx);
2142 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2143 goto out;
2144
2145 __ieee80211_stop_poll(sdata);
2146
2147 mutex_lock(&local->iflist_mtx);
2148 ieee80211_recalc_ps(local);
2149 mutex_unlock(&local->iflist_mtx);
2150
2151 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2152 goto out;
2153
2154 /*
2155 * We've received a probe response, but are not sure whether
2156 * we have or will be receiving any beacons or data, so let's
2157 * schedule the timers again, just in case.
2158 */
2159 ieee80211_sta_reset_beacon_monitor(sdata);
2160
2161 mod_timer(&ifmgd->conn_mon_timer,
2162 round_jiffies_up(jiffies +
2163 IEEE80211_CONNECTION_IDLE_TIME));
2164 out:
2165 mutex_unlock(&local->mtx);
2166 }
2167
2168 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2169 struct ieee80211_hdr *hdr,
2170 u16 tx_time)
2171 {
2172 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2173 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2174 int ac = ieee80211_ac_from_tid(tid);
2175 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2176 unsigned long now = jiffies;
2177
2178 if (likely(!tx_tspec->admitted_time))
2179 return;
2180
2181 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2182 tx_tspec->consumed_tx_time = 0;
2183 tx_tspec->time_slice_start = now;
2184
2185 if (tx_tspec->downgraded) {
2186 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2187 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2188 }
2189 }
2190
2191 if (tx_tspec->downgraded)
2192 return;
2193
2194 tx_tspec->consumed_tx_time += tx_time;
2195
2196 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2197 tx_tspec->downgraded = true;
2198 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2199 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2200 }
2201 }
2202
2203 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2204 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2205 {
2206 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2207
2208 if (!ieee80211_is_data(hdr->frame_control))
2209 return;
2210
2211 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2212 sdata->u.mgd.probe_send_count > 0) {
2213 if (ack)
2214 ieee80211_sta_reset_conn_monitor(sdata);
2215 else
2216 sdata->u.mgd.nullfunc_failed = true;
2217 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2218 return;
2219 }
2220
2221 if (ack)
2222 ieee80211_sta_reset_conn_monitor(sdata);
2223 }
2224
2225 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2226 {
2227 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2228 const u8 *ssid;
2229 u8 *dst = ifmgd->associated->bssid;
2230 u8 unicast_limit = max(1, max_probe_tries - 3);
2231 struct sta_info *sta;
2232
2233 /*
2234 * Try sending broadcast probe requests for the last three
2235 * probe requests after the first ones failed since some
2236 * buggy APs only support broadcast probe requests.
2237 */
2238 if (ifmgd->probe_send_count >= unicast_limit)
2239 dst = NULL;
2240
2241 /*
2242 * When the hardware reports an accurate Tx ACK status, it's
2243 * better to send a nullfunc frame instead of a probe request,
2244 * as it will kick us off the AP quickly if we aren't associated
2245 * anymore. The timeout will be reset if the frame is ACKed by
2246 * the AP.
2247 */
2248 ifmgd->probe_send_count++;
2249
2250 if (dst) {
2251 mutex_lock(&sdata->local->sta_mtx);
2252 sta = sta_info_get(sdata, dst);
2253 if (!WARN_ON(!sta))
2254 ieee80211_check_fast_rx(sta);
2255 mutex_unlock(&sdata->local->sta_mtx);
2256 }
2257
2258 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2259 ifmgd->nullfunc_failed = false;
2260 ieee80211_send_nullfunc(sdata->local, sdata, false);
2261 } else {
2262 int ssid_len;
2263
2264 rcu_read_lock();
2265 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2266 if (WARN_ON_ONCE(ssid == NULL))
2267 ssid_len = 0;
2268 else
2269 ssid_len = ssid[1];
2270
2271 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2272 ssid + 2, ssid_len, NULL,
2273 0, (u32) -1, true, 0,
2274 ifmgd->associated->channel, false);
2275 rcu_read_unlock();
2276 }
2277
2278 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2279 run_again(sdata, ifmgd->probe_timeout);
2280 }
2281
2282 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2283 bool beacon)
2284 {
2285 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2286 bool already = false;
2287
2288 if (!ieee80211_sdata_running(sdata))
2289 return;
2290
2291 sdata_lock(sdata);
2292
2293 if (!ifmgd->associated)
2294 goto out;
2295
2296 mutex_lock(&sdata->local->mtx);
2297
2298 if (sdata->local->tmp_channel || sdata->local->scanning) {
2299 mutex_unlock(&sdata->local->mtx);
2300 goto out;
2301 }
2302
2303 if (beacon) {
2304 mlme_dbg_ratelimited(sdata,
2305 "detected beacon loss from AP (missed %d beacons) - probing\n",
2306 beacon_loss_count);
2307
2308 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2309 }
2310
2311 /*
2312 * The driver/our work has already reported this event or the
2313 * connection monitoring has kicked in and we have already sent
2314 * a probe request. Or maybe the AP died and the driver keeps
2315 * reporting until we disassociate...
2316 *
2317 * In either case we have to ignore the current call to this
2318 * function (except for setting the correct probe reason bit)
2319 * because otherwise we would reset the timer every time and
2320 * never check whether we received a probe response!
2321 */
2322 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2323 already = true;
2324
2325 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2326
2327 mutex_unlock(&sdata->local->mtx);
2328
2329 if (already)
2330 goto out;
2331
2332 mutex_lock(&sdata->local->iflist_mtx);
2333 ieee80211_recalc_ps(sdata->local);
2334 mutex_unlock(&sdata->local->iflist_mtx);
2335
2336 ifmgd->probe_send_count = 0;
2337 ieee80211_mgd_probe_ap_send(sdata);
2338 out:
2339 sdata_unlock(sdata);
2340 }
2341
2342 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2343 struct ieee80211_vif *vif)
2344 {
2345 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2346 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2347 struct cfg80211_bss *cbss;
2348 struct sk_buff *skb;
2349 const u8 *ssid;
2350 int ssid_len;
2351
2352 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2353 return NULL;
2354
2355 sdata_assert_lock(sdata);
2356
2357 if (ifmgd->associated)
2358 cbss = ifmgd->associated;
2359 else if (ifmgd->auth_data)
2360 cbss = ifmgd->auth_data->bss;
2361 else if (ifmgd->assoc_data)
2362 cbss = ifmgd->assoc_data->bss;
2363 else
2364 return NULL;
2365
2366 rcu_read_lock();
2367 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2368 if (WARN_ON_ONCE(ssid == NULL))
2369 ssid_len = 0;
2370 else
2371 ssid_len = ssid[1];
2372
2373 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2374 (u32) -1, cbss->channel,
2375 ssid + 2, ssid_len,
2376 NULL, 0, true);
2377 rcu_read_unlock();
2378
2379 return skb;
2380 }
2381 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2382
2383 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2384 const u8 *buf, size_t len, bool tx,
2385 u16 reason)
2386 {
2387 struct ieee80211_event event = {
2388 .type = MLME_EVENT,
2389 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2390 .u.mlme.reason = reason,
2391 };
2392
2393 if (tx)
2394 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2395 else
2396 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2397
2398 drv_event_callback(sdata->local, sdata, &event);
2399 }
2400
2401 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2402 {
2403 struct ieee80211_local *local = sdata->local;
2404 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2405 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2406
2407 sdata_lock(sdata);
2408 if (!ifmgd->associated) {
2409 sdata_unlock(sdata);
2410 return;
2411 }
2412
2413 /* AP is probably out of range (or not reachable for another reason) so
2414 * remove the bss struct for that AP.
2415 */
2416 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2417
2418 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2419 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2420 true, frame_buf);
2421 mutex_lock(&local->mtx);
2422 sdata->vif.csa_active = false;
2423 ifmgd->csa_waiting_bcn = false;
2424 if (sdata->csa_block_tx) {
2425 ieee80211_wake_vif_queues(local, sdata,
2426 IEEE80211_QUEUE_STOP_REASON_CSA);
2427 sdata->csa_block_tx = false;
2428 }
2429 mutex_unlock(&local->mtx);
2430
2431 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2432 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2433
2434 sdata_unlock(sdata);
2435 }
2436
2437 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2438 {
2439 struct ieee80211_sub_if_data *sdata =
2440 container_of(work, struct ieee80211_sub_if_data,
2441 u.mgd.beacon_connection_loss_work);
2442 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2443
2444 if (ifmgd->associated)
2445 ifmgd->beacon_loss_count++;
2446
2447 if (ifmgd->connection_loss) {
2448 sdata_info(sdata, "Connection to AP %pM lost\n",
2449 ifmgd->bssid);
2450 __ieee80211_disconnect(sdata);
2451 } else {
2452 ieee80211_mgd_probe_ap(sdata, true);
2453 }
2454 }
2455
2456 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2457 {
2458 struct ieee80211_sub_if_data *sdata =
2459 container_of(work, struct ieee80211_sub_if_data,
2460 u.mgd.csa_connection_drop_work);
2461
2462 __ieee80211_disconnect(sdata);
2463 }
2464
2465 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2466 {
2467 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2468 struct ieee80211_hw *hw = &sdata->local->hw;
2469
2470 trace_api_beacon_loss(sdata);
2471
2472 sdata->u.mgd.connection_loss = false;
2473 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2474 }
2475 EXPORT_SYMBOL(ieee80211_beacon_loss);
2476
2477 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2478 {
2479 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2480 struct ieee80211_hw *hw = &sdata->local->hw;
2481
2482 trace_api_connection_loss(sdata);
2483
2484 sdata->u.mgd.connection_loss = true;
2485 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2486 }
2487 EXPORT_SYMBOL(ieee80211_connection_loss);
2488
2489
2490 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2491 bool assoc)
2492 {
2493 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2494
2495 sdata_assert_lock(sdata);
2496
2497 if (!assoc) {
2498 /*
2499 * we are not authenticated yet, the only timer that could be
2500 * running is the timeout for the authentication response which
2501 * which is not relevant anymore.
2502 */
2503 del_timer_sync(&sdata->u.mgd.timer);
2504 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2505
2506 eth_zero_addr(sdata->u.mgd.bssid);
2507 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2508 sdata->u.mgd.flags = 0;
2509 mutex_lock(&sdata->local->mtx);
2510 ieee80211_vif_release_channel(sdata);
2511 mutex_unlock(&sdata->local->mtx);
2512 }
2513
2514 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2515 kfree(auth_data);
2516 sdata->u.mgd.auth_data = NULL;
2517 }
2518
2519 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2520 bool assoc, bool abandon)
2521 {
2522 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2523
2524 sdata_assert_lock(sdata);
2525
2526 if (!assoc) {
2527 /*
2528 * we are not associated yet, the only timer that could be
2529 * running is the timeout for the association response which
2530 * which is not relevant anymore.
2531 */
2532 del_timer_sync(&sdata->u.mgd.timer);
2533 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2534
2535 eth_zero_addr(sdata->u.mgd.bssid);
2536 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2537 sdata->u.mgd.flags = 0;
2538 sdata->vif.mu_mimo_owner = false;
2539
2540 mutex_lock(&sdata->local->mtx);
2541 ieee80211_vif_release_channel(sdata);
2542 mutex_unlock(&sdata->local->mtx);
2543
2544 if (abandon)
2545 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2546 }
2547
2548 kfree(assoc_data);
2549 sdata->u.mgd.assoc_data = NULL;
2550 }
2551
2552 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2553 struct ieee80211_mgmt *mgmt, size_t len)
2554 {
2555 struct ieee80211_local *local = sdata->local;
2556 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2557 u8 *pos;
2558 struct ieee802_11_elems elems;
2559 u32 tx_flags = 0;
2560
2561 pos = mgmt->u.auth.variable;
2562 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2563 if (!elems.challenge)
2564 return;
2565 auth_data->expected_transaction = 4;
2566 drv_mgd_prepare_tx(sdata->local, sdata);
2567 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2568 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2569 IEEE80211_TX_INTFL_MLME_CONN_TX;
2570 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2571 elems.challenge - 2, elems.challenge_len + 2,
2572 auth_data->bss->bssid, auth_data->bss->bssid,
2573 auth_data->key, auth_data->key_len,
2574 auth_data->key_idx, tx_flags);
2575 }
2576
2577 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2578 struct ieee80211_mgmt *mgmt, size_t len)
2579 {
2580 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2581 u8 bssid[ETH_ALEN];
2582 u16 auth_alg, auth_transaction, status_code;
2583 struct sta_info *sta;
2584 struct ieee80211_event event = {
2585 .type = MLME_EVENT,
2586 .u.mlme.data = AUTH_EVENT,
2587 };
2588
2589 sdata_assert_lock(sdata);
2590
2591 if (len < 24 + 6)
2592 return;
2593
2594 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2595 return;
2596
2597 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2598
2599 if (!ether_addr_equal(bssid, mgmt->bssid))
2600 return;
2601
2602 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2603 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2604 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2605
2606 if (auth_alg != ifmgd->auth_data->algorithm ||
2607 auth_transaction != ifmgd->auth_data->expected_transaction) {
2608 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2609 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2610 auth_transaction,
2611 ifmgd->auth_data->expected_transaction);
2612 return;
2613 }
2614
2615 if (status_code != WLAN_STATUS_SUCCESS) {
2616 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2617 mgmt->sa, status_code);
2618 ieee80211_destroy_auth_data(sdata, false);
2619 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2620 event.u.mlme.status = MLME_DENIED;
2621 event.u.mlme.reason = status_code;
2622 drv_event_callback(sdata->local, sdata, &event);
2623 return;
2624 }
2625
2626 switch (ifmgd->auth_data->algorithm) {
2627 case WLAN_AUTH_OPEN:
2628 case WLAN_AUTH_LEAP:
2629 case WLAN_AUTH_FT:
2630 case WLAN_AUTH_SAE:
2631 case WLAN_AUTH_FILS_SK:
2632 case WLAN_AUTH_FILS_SK_PFS:
2633 case WLAN_AUTH_FILS_PK:
2634 break;
2635 case WLAN_AUTH_SHARED_KEY:
2636 if (ifmgd->auth_data->expected_transaction != 4) {
2637 ieee80211_auth_challenge(sdata, mgmt, len);
2638 /* need another frame */
2639 return;
2640 }
2641 break;
2642 default:
2643 WARN_ONCE(1, "invalid auth alg %d",
2644 ifmgd->auth_data->algorithm);
2645 return;
2646 }
2647
2648 event.u.mlme.status = MLME_SUCCESS;
2649 drv_event_callback(sdata->local, sdata, &event);
2650 sdata_info(sdata, "authenticated\n");
2651 ifmgd->auth_data->done = true;
2652 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2653 ifmgd->auth_data->timeout_started = true;
2654 run_again(sdata, ifmgd->auth_data->timeout);
2655
2656 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2657 ifmgd->auth_data->expected_transaction != 2) {
2658 /*
2659 * Report auth frame to user space for processing since another
2660 * round of Authentication frames is still needed.
2661 */
2662 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2663 return;
2664 }
2665
2666 /* move station state to auth */
2667 mutex_lock(&sdata->local->sta_mtx);
2668 sta = sta_info_get(sdata, bssid);
2669 if (!sta) {
2670 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2671 goto out_err;
2672 }
2673 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2674 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2675 goto out_err;
2676 }
2677 mutex_unlock(&sdata->local->sta_mtx);
2678
2679 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2680 return;
2681 out_err:
2682 mutex_unlock(&sdata->local->sta_mtx);
2683 /* ignore frame -- wait for timeout */
2684 }
2685
2686 #define case_WLAN(type) \
2687 case WLAN_REASON_##type: return #type
2688
2689 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2690 {
2691 switch (reason_code) {
2692 case_WLAN(UNSPECIFIED);
2693 case_WLAN(PREV_AUTH_NOT_VALID);
2694 case_WLAN(DEAUTH_LEAVING);
2695 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2696 case_WLAN(DISASSOC_AP_BUSY);
2697 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2698 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2699 case_WLAN(DISASSOC_STA_HAS_LEFT);
2700 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2701 case_WLAN(DISASSOC_BAD_POWER);
2702 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2703 case_WLAN(INVALID_IE);
2704 case_WLAN(MIC_FAILURE);
2705 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2706 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2707 case_WLAN(IE_DIFFERENT);
2708 case_WLAN(INVALID_GROUP_CIPHER);
2709 case_WLAN(INVALID_PAIRWISE_CIPHER);
2710 case_WLAN(INVALID_AKMP);
2711 case_WLAN(UNSUPP_RSN_VERSION);
2712 case_WLAN(INVALID_RSN_IE_CAP);
2713 case_WLAN(IEEE8021X_FAILED);
2714 case_WLAN(CIPHER_SUITE_REJECTED);
2715 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2716 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2717 case_WLAN(DISASSOC_LOW_ACK);
2718 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2719 case_WLAN(QSTA_LEAVE_QBSS);
2720 case_WLAN(QSTA_NOT_USE);
2721 case_WLAN(QSTA_REQUIRE_SETUP);
2722 case_WLAN(QSTA_TIMEOUT);
2723 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2724 case_WLAN(MESH_PEER_CANCELED);
2725 case_WLAN(MESH_MAX_PEERS);
2726 case_WLAN(MESH_CONFIG);
2727 case_WLAN(MESH_CLOSE);
2728 case_WLAN(MESH_MAX_RETRIES);
2729 case_WLAN(MESH_CONFIRM_TIMEOUT);
2730 case_WLAN(MESH_INVALID_GTK);
2731 case_WLAN(MESH_INCONSISTENT_PARAM);
2732 case_WLAN(MESH_INVALID_SECURITY);
2733 case_WLAN(MESH_PATH_ERROR);
2734 case_WLAN(MESH_PATH_NOFORWARD);
2735 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2736 case_WLAN(MAC_EXISTS_IN_MBSS);
2737 case_WLAN(MESH_CHAN_REGULATORY);
2738 case_WLAN(MESH_CHAN);
2739 default: return "<unknown>";
2740 }
2741 }
2742
2743 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2744 struct ieee80211_mgmt *mgmt, size_t len)
2745 {
2746 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2747 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2748
2749 sdata_assert_lock(sdata);
2750
2751 if (len < 24 + 2)
2752 return;
2753
2754 if (ifmgd->associated &&
2755 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2756 const u8 *bssid = ifmgd->associated->bssid;
2757
2758 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2759 bssid, reason_code,
2760 ieee80211_get_reason_code_string(reason_code));
2761
2762 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2763
2764 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2765 reason_code);
2766 return;
2767 }
2768
2769 if (ifmgd->assoc_data &&
2770 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2771 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2772
2773 sdata_info(sdata,
2774 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2775 bssid, reason_code,
2776 ieee80211_get_reason_code_string(reason_code));
2777
2778 ieee80211_destroy_assoc_data(sdata, false, true);
2779
2780 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2781 return;
2782 }
2783 }
2784
2785
2786 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2787 struct ieee80211_mgmt *mgmt, size_t len)
2788 {
2789 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2790 u16 reason_code;
2791
2792 sdata_assert_lock(sdata);
2793
2794 if (len < 24 + 2)
2795 return;
2796
2797 if (!ifmgd->associated ||
2798 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2799 return;
2800
2801 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2802
2803 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
2804 mgmt->sa, reason_code,
2805 ieee80211_get_reason_code_string(reason_code));
2806
2807 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2808
2809 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2810 }
2811
2812 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2813 u8 *supp_rates, unsigned int supp_rates_len,
2814 u32 *rates, u32 *basic_rates,
2815 bool *have_higher_than_11mbit,
2816 int *min_rate, int *min_rate_index,
2817 int shift)
2818 {
2819 int i, j;
2820
2821 for (i = 0; i < supp_rates_len; i++) {
2822 int rate = supp_rates[i] & 0x7f;
2823 bool is_basic = !!(supp_rates[i] & 0x80);
2824
2825 if ((rate * 5 * (1 << shift)) > 110)
2826 *have_higher_than_11mbit = true;
2827
2828 /*
2829 * Skip HT and VHT BSS membership selectors since they're not
2830 * rates.
2831 *
2832 * Note: Even though the membership selector and the basic
2833 * rate flag share the same bit, they are not exactly
2834 * the same.
2835 */
2836 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
2837 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
2838 continue;
2839
2840 for (j = 0; j < sband->n_bitrates; j++) {
2841 struct ieee80211_rate *br;
2842 int brate;
2843
2844 br = &sband->bitrates[j];
2845
2846 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2847 if (brate == rate) {
2848 *rates |= BIT(j);
2849 if (is_basic)
2850 *basic_rates |= BIT(j);
2851 if ((rate * 5) < *min_rate) {
2852 *min_rate = rate * 5;
2853 *min_rate_index = j;
2854 }
2855 break;
2856 }
2857 }
2858 }
2859 }
2860
2861 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2862 struct cfg80211_bss *cbss,
2863 struct ieee80211_mgmt *mgmt, size_t len)
2864 {
2865 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2866 struct ieee80211_local *local = sdata->local;
2867 struct ieee80211_supported_band *sband;
2868 struct sta_info *sta;
2869 u8 *pos;
2870 u16 capab_info, aid;
2871 struct ieee802_11_elems elems;
2872 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2873 const struct cfg80211_bss_ies *bss_ies = NULL;
2874 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2875 u32 changed = 0;
2876 int err;
2877 bool ret;
2878
2879 /* AssocResp and ReassocResp have identical structure */
2880
2881 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2882 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2883
2884 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2885 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2886 aid);
2887 aid &= ~(BIT(15) | BIT(14));
2888
2889 ifmgd->broken_ap = false;
2890
2891 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2892 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2893 aid);
2894 aid = 0;
2895 ifmgd->broken_ap = true;
2896 }
2897
2898 pos = mgmt->u.assoc_resp.variable;
2899 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2900
2901 if (!elems.supp_rates) {
2902 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2903 return false;
2904 }
2905
2906 ifmgd->aid = aid;
2907 ifmgd->tdls_chan_switch_prohibited =
2908 elems.ext_capab && elems.ext_capab_len >= 5 &&
2909 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2910
2911 /*
2912 * Some APs are erroneously not including some information in their
2913 * (re)association response frames. Try to recover by using the data
2914 * from the beacon or probe response. This seems to afflict mobile
2915 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2916 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2917 */
2918 if ((assoc_data->wmm && !elems.wmm_param) ||
2919 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2920 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2921 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2922 (!elems.vht_cap_elem || !elems.vht_operation))) {
2923 const struct cfg80211_bss_ies *ies;
2924 struct ieee802_11_elems bss_elems;
2925
2926 rcu_read_lock();
2927 ies = rcu_dereference(cbss->ies);
2928 if (ies)
2929 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2930 GFP_ATOMIC);
2931 rcu_read_unlock();
2932 if (!bss_ies)
2933 return false;
2934
2935 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2936 false, &bss_elems);
2937 if (assoc_data->wmm &&
2938 !elems.wmm_param && bss_elems.wmm_param) {
2939 elems.wmm_param = bss_elems.wmm_param;
2940 sdata_info(sdata,
2941 "AP bug: WMM param missing from AssocResp\n");
2942 }
2943
2944 /*
2945 * Also check if we requested HT/VHT, otherwise the AP doesn't
2946 * have to include the IEs in the (re)association response.
2947 */
2948 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2949 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2950 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2951 sdata_info(sdata,
2952 "AP bug: HT capability missing from AssocResp\n");
2953 }
2954 if (!elems.ht_operation && bss_elems.ht_operation &&
2955 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2956 elems.ht_operation = bss_elems.ht_operation;
2957 sdata_info(sdata,
2958 "AP bug: HT operation missing from AssocResp\n");
2959 }
2960 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2961 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2962 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2963 sdata_info(sdata,
2964 "AP bug: VHT capa missing from AssocResp\n");
2965 }
2966 if (!elems.vht_operation && bss_elems.vht_operation &&
2967 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2968 elems.vht_operation = bss_elems.vht_operation;
2969 sdata_info(sdata,
2970 "AP bug: VHT operation missing from AssocResp\n");
2971 }
2972 }
2973
2974 /*
2975 * We previously checked these in the beacon/probe response, so
2976 * they should be present here. This is just a safety net.
2977 */
2978 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2979 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2980 sdata_info(sdata,
2981 "HT AP is missing WMM params or HT capability/operation\n");
2982 ret = false;
2983 goto out;
2984 }
2985
2986 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2987 (!elems.vht_cap_elem || !elems.vht_operation)) {
2988 sdata_info(sdata,
2989 "VHT AP is missing VHT capability/operation\n");
2990 ret = false;
2991 goto out;
2992 }
2993
2994 mutex_lock(&sdata->local->sta_mtx);
2995 /*
2996 * station info was already allocated and inserted before
2997 * the association and should be available to us
2998 */
2999 sta = sta_info_get(sdata, cbss->bssid);
3000 if (WARN_ON(!sta)) {
3001 mutex_unlock(&sdata->local->sta_mtx);
3002 ret = false;
3003 goto out;
3004 }
3005
3006 sband = ieee80211_get_sband(sdata);
3007 if (!sband) {
3008 mutex_unlock(&sdata->local->sta_mtx);
3009 ret = false;
3010 goto out;
3011 }
3012
3013 /* Set up internal HT/VHT capabilities */
3014 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3015 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3016 elems.ht_cap_elem, sta);
3017
3018 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3019 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3020 elems.vht_cap_elem, sta);
3021
3022 /*
3023 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3024 * in their association response, so ignore that data for our own
3025 * configuration. If it changed since the last beacon, we'll get the
3026 * next beacon and update then.
3027 */
3028
3029 /*
3030 * If an operating mode notification IE is present, override the
3031 * NSS calculation (that would be done in rate_control_rate_init())
3032 * and use the # of streams from that element.
3033 */
3034 if (elems.opmode_notif &&
3035 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3036 u8 nss;
3037
3038 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3039 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3040 nss += 1;
3041 sta->sta.rx_nss = nss;
3042 }
3043
3044 rate_control_rate_init(sta);
3045
3046 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3047 set_sta_flag(sta, WLAN_STA_MFP);
3048 sta->sta.mfp = true;
3049 } else {
3050 sta->sta.mfp = false;
3051 }
3052
3053 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3054
3055 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3056 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3057 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3058 if (err) {
3059 sdata_info(sdata,
3060 "failed to move station %pM to desired state\n",
3061 sta->sta.addr);
3062 WARN_ON(__sta_info_destroy(sta));
3063 mutex_unlock(&sdata->local->sta_mtx);
3064 ret = false;
3065 goto out;
3066 }
3067
3068 mutex_unlock(&sdata->local->sta_mtx);
3069
3070 /*
3071 * Always handle WMM once after association regardless
3072 * of the first value the AP uses. Setting -1 here has
3073 * that effect because the AP values is an unsigned
3074 * 4-bit value.
3075 */
3076 ifmgd->wmm_last_param_set = -1;
3077
3078 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3079 ieee80211_set_wmm_default(sdata, false, false);
3080 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3081 elems.wmm_param_len)) {
3082 /* still enable QoS since we might have HT/VHT */
3083 ieee80211_set_wmm_default(sdata, false, true);
3084 /* set the disable-WMM flag in this case to disable
3085 * tracking WMM parameter changes in the beacon if
3086 * the parameters weren't actually valid. Doing so
3087 * avoids changing parameters very strangely when
3088 * the AP is going back and forth between valid and
3089 * invalid parameters.
3090 */
3091 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3092 }
3093 changed |= BSS_CHANGED_QOS;
3094
3095 if (elems.max_idle_period_ie) {
3096 bss_conf->max_idle_period =
3097 le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
3098 bss_conf->protected_keep_alive =
3099 !!(elems.max_idle_period_ie->idle_options &
3100 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3101 changed |= BSS_CHANGED_KEEP_ALIVE;
3102 } else {
3103 bss_conf->max_idle_period = 0;
3104 bss_conf->protected_keep_alive = false;
3105 }
3106
3107 /* set AID and assoc capability,
3108 * ieee80211_set_associated() will tell the driver */
3109 bss_conf->aid = aid;
3110 bss_conf->assoc_capability = capab_info;
3111 ieee80211_set_associated(sdata, cbss, changed);
3112
3113 /*
3114 * If we're using 4-addr mode, let the AP know that we're
3115 * doing so, so that it can create the STA VLAN on its side
3116 */
3117 if (ifmgd->use_4addr)
3118 ieee80211_send_4addr_nullfunc(local, sdata);
3119
3120 /*
3121 * Start timer to probe the connection to the AP now.
3122 * Also start the timer that will detect beacon loss.
3123 */
3124 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3125 ieee80211_sta_reset_beacon_monitor(sdata);
3126
3127 ret = true;
3128 out:
3129 kfree(bss_ies);
3130 return ret;
3131 }
3132
3133 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3134 struct ieee80211_mgmt *mgmt,
3135 size_t len)
3136 {
3137 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3138 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3139 u16 capab_info, status_code, aid;
3140 struct ieee802_11_elems elems;
3141 int ac, uapsd_queues = -1;
3142 u8 *pos;
3143 bool reassoc;
3144 struct cfg80211_bss *bss;
3145 struct ieee80211_event event = {
3146 .type = MLME_EVENT,
3147 .u.mlme.data = ASSOC_EVENT,
3148 };
3149
3150 sdata_assert_lock(sdata);
3151
3152 if (!assoc_data)
3153 return;
3154 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3155 return;
3156
3157 /*
3158 * AssocResp and ReassocResp have identical structure, so process both
3159 * of them in this function.
3160 */
3161
3162 if (len < 24 + 6)
3163 return;
3164
3165 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3166 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3167 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3168 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3169
3170 sdata_info(sdata,
3171 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3172 reassoc ? "Rea" : "A", mgmt->sa,
3173 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3174
3175 if (assoc_data->fils_kek_len &&
3176 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3177 return;
3178
3179 pos = mgmt->u.assoc_resp.variable;
3180 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3181
3182 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3183 elems.timeout_int &&
3184 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3185 u32 tu, ms;
3186 tu = le32_to_cpu(elems.timeout_int->value);
3187 ms = tu * 1024 / 1000;
3188 sdata_info(sdata,
3189 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3190 mgmt->sa, tu, ms);
3191 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3192 assoc_data->timeout_started = true;
3193 if (ms > IEEE80211_ASSOC_TIMEOUT)
3194 run_again(sdata, assoc_data->timeout);
3195 return;
3196 }
3197
3198 bss = assoc_data->bss;
3199
3200 if (status_code != WLAN_STATUS_SUCCESS) {
3201 sdata_info(sdata, "%pM denied association (code=%d)\n",
3202 mgmt->sa, status_code);
3203 ieee80211_destroy_assoc_data(sdata, false, false);
3204 event.u.mlme.status = MLME_DENIED;
3205 event.u.mlme.reason = status_code;
3206 drv_event_callback(sdata->local, sdata, &event);
3207 } else {
3208 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3209 /* oops -- internal error -- send timeout for now */
3210 ieee80211_destroy_assoc_data(sdata, false, false);
3211 cfg80211_assoc_timeout(sdata->dev, bss);
3212 return;
3213 }
3214 event.u.mlme.status = MLME_SUCCESS;
3215 drv_event_callback(sdata->local, sdata, &event);
3216 sdata_info(sdata, "associated\n");
3217
3218 /*
3219 * destroy assoc_data afterwards, as otherwise an idle
3220 * recalc after assoc_data is NULL but before associated
3221 * is set can cause the interface to go idle
3222 */
3223 ieee80211_destroy_assoc_data(sdata, true, false);
3224
3225 /* get uapsd queues configuration */
3226 uapsd_queues = 0;
3227 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3228 if (sdata->tx_conf[ac].uapsd)
3229 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3230 }
3231
3232 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3233 }
3234
3235 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3236 struct ieee80211_mgmt *mgmt, size_t len,
3237 struct ieee80211_rx_status *rx_status,
3238 struct ieee802_11_elems *elems)
3239 {
3240 struct ieee80211_local *local = sdata->local;
3241 struct ieee80211_bss *bss;
3242 struct ieee80211_channel *channel;
3243
3244 sdata_assert_lock(sdata);
3245
3246 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3247 if (!channel)
3248 return;
3249
3250 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3251 channel);
3252 if (bss) {
3253 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3254 ieee80211_rx_bss_put(local, bss);
3255 }
3256 }
3257
3258
3259 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3260 struct sk_buff *skb)
3261 {
3262 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3263 struct ieee80211_if_managed *ifmgd;
3264 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3265 size_t baselen, len = skb->len;
3266 struct ieee802_11_elems elems;
3267
3268 ifmgd = &sdata->u.mgd;
3269
3270 sdata_assert_lock(sdata);
3271
3272 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3273 return; /* ignore ProbeResp to foreign address */
3274
3275 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3276 if (baselen > len)
3277 return;
3278
3279 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3280 false, &elems);
3281
3282 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3283
3284 if (ifmgd->associated &&
3285 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3286 ieee80211_reset_ap_probe(sdata);
3287 }
3288
3289 /*
3290 * This is the canonical list of information elements we care about,
3291 * the filter code also gives us all changes to the Microsoft OUI
3292 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3293 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3294 * changes to requested client power.
3295 *
3296 * We implement beacon filtering in software since that means we can
3297 * avoid processing the frame here and in cfg80211, and userspace
3298 * will not be able to tell whether the hardware supports it or not.
3299 *
3300 * XXX: This list needs to be dynamic -- userspace needs to be able to
3301 * add items it requires. It also needs to be able to tell us to
3302 * look out for other vendor IEs.
3303 */
3304 static const u64 care_about_ies =
3305 (1ULL << WLAN_EID_COUNTRY) |
3306 (1ULL << WLAN_EID_ERP_INFO) |
3307 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3308 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3309 (1ULL << WLAN_EID_HT_CAPABILITY) |
3310 (1ULL << WLAN_EID_HT_OPERATION) |
3311 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3312
3313 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3314 struct ieee80211_mgmt *mgmt, size_t len,
3315 struct ieee80211_rx_status *rx_status)
3316 {
3317 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3318 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3319 size_t baselen;
3320 struct ieee802_11_elems elems;
3321 struct ieee80211_local *local = sdata->local;
3322 struct ieee80211_chanctx_conf *chanctx_conf;
3323 struct ieee80211_channel *chan;
3324 struct sta_info *sta;
3325 u32 changed = 0;
3326 bool erp_valid;
3327 u8 erp_value = 0;
3328 u32 ncrc;
3329 u8 *bssid;
3330 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3331
3332 sdata_assert_lock(sdata);
3333
3334 /* Process beacon from the current BSS */
3335 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3336 if (baselen > len)
3337 return;
3338
3339 rcu_read_lock();
3340 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3341 if (!chanctx_conf) {
3342 rcu_read_unlock();
3343 return;
3344 }
3345
3346 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3347 rcu_read_unlock();
3348 return;
3349 }
3350 chan = chanctx_conf->def.chan;
3351 rcu_read_unlock();
3352
3353 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3354 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3355 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3356 len - baselen, false, &elems);
3357
3358 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3359 if (elems.tim && !elems.parse_error) {
3360 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3361 ifmgd->dtim_period = tim_ie->dtim_period;
3362 }
3363 ifmgd->have_beacon = true;
3364 ifmgd->assoc_data->need_beacon = false;
3365 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3366 sdata->vif.bss_conf.sync_tsf =
3367 le64_to_cpu(mgmt->u.beacon.timestamp);
3368 sdata->vif.bss_conf.sync_device_ts =
3369 rx_status->device_timestamp;
3370 if (elems.tim)
3371 sdata->vif.bss_conf.sync_dtim_count =
3372 elems.tim->dtim_count;
3373 else
3374 sdata->vif.bss_conf.sync_dtim_count = 0;
3375 }
3376 /* continue assoc process */
3377 ifmgd->assoc_data->timeout = jiffies;
3378 ifmgd->assoc_data->timeout_started = true;
3379 run_again(sdata, ifmgd->assoc_data->timeout);
3380 return;
3381 }
3382
3383 if (!ifmgd->associated ||
3384 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3385 return;
3386 bssid = ifmgd->associated->bssid;
3387
3388 /* Track average RSSI from the Beacon frames of the current AP */
3389 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3390 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3391 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3392 ifmgd->last_cqm_event_signal = 0;
3393 ifmgd->count_beacon_signal = 1;
3394 ifmgd->last_ave_beacon_signal = 0;
3395 } else {
3396 ifmgd->count_beacon_signal++;
3397 }
3398
3399 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3400
3401 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3402 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3403 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3404 int last_sig = ifmgd->last_ave_beacon_signal;
3405 struct ieee80211_event event = {
3406 .type = RSSI_EVENT,
3407 };
3408
3409 /*
3410 * if signal crosses either of the boundaries, invoke callback
3411 * with appropriate parameters
3412 */
3413 if (sig > ifmgd->rssi_max_thold &&
3414 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3415 ifmgd->last_ave_beacon_signal = sig;
3416 event.u.rssi.data = RSSI_EVENT_HIGH;
3417 drv_event_callback(local, sdata, &event);
3418 } else if (sig < ifmgd->rssi_min_thold &&
3419 (last_sig >= ifmgd->rssi_max_thold ||
3420 last_sig == 0)) {
3421 ifmgd->last_ave_beacon_signal = sig;
3422 event.u.rssi.data = RSSI_EVENT_LOW;
3423 drv_event_callback(local, sdata, &event);
3424 }
3425 }
3426
3427 if (bss_conf->cqm_rssi_thold &&
3428 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3429 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3430 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3431 int last_event = ifmgd->last_cqm_event_signal;
3432 int thold = bss_conf->cqm_rssi_thold;
3433 int hyst = bss_conf->cqm_rssi_hyst;
3434
3435 if (sig < thold &&
3436 (last_event == 0 || sig < last_event - hyst)) {
3437 ifmgd->last_cqm_event_signal = sig;
3438 ieee80211_cqm_rssi_notify(
3439 &sdata->vif,
3440 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3441 sig, GFP_KERNEL);
3442 } else if (sig > thold &&
3443 (last_event == 0 || sig > last_event + hyst)) {
3444 ifmgd->last_cqm_event_signal = sig;
3445 ieee80211_cqm_rssi_notify(
3446 &sdata->vif,
3447 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3448 sig, GFP_KERNEL);
3449 }
3450 }
3451
3452 if (bss_conf->cqm_rssi_low &&
3453 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3454 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3455 int last_event = ifmgd->last_cqm_event_signal;
3456 int low = bss_conf->cqm_rssi_low;
3457 int high = bss_conf->cqm_rssi_high;
3458
3459 if (sig < low &&
3460 (last_event == 0 || last_event >= low)) {
3461 ifmgd->last_cqm_event_signal = sig;
3462 ieee80211_cqm_rssi_notify(
3463 &sdata->vif,
3464 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3465 sig, GFP_KERNEL);
3466 } else if (sig > high &&
3467 (last_event == 0 || last_event <= high)) {
3468 ifmgd->last_cqm_event_signal = sig;
3469 ieee80211_cqm_rssi_notify(
3470 &sdata->vif,
3471 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3472 sig, GFP_KERNEL);
3473 }
3474 }
3475
3476 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3477 mlme_dbg_ratelimited(sdata,
3478 "cancelling AP probe due to a received beacon\n");
3479 ieee80211_reset_ap_probe(sdata);
3480 }
3481
3482 /*
3483 * Push the beacon loss detection into the future since
3484 * we are processing a beacon from the AP just now.
3485 */
3486 ieee80211_sta_reset_beacon_monitor(sdata);
3487
3488 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3489 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3490 len - baselen, false, &elems,
3491 care_about_ies, ncrc);
3492
3493 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3494 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3495 if (local->hw.conf.dynamic_ps_timeout > 0) {
3496 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3497 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3498 ieee80211_hw_config(local,
3499 IEEE80211_CONF_CHANGE_PS);
3500 }
3501 ieee80211_send_nullfunc(local, sdata, false);
3502 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3503 local->pspolling = true;
3504
3505 /*
3506 * Here is assumed that the driver will be
3507 * able to send ps-poll frame and receive a
3508 * response even though power save mode is
3509 * enabled, but some drivers might require
3510 * to disable power save here. This needs
3511 * to be investigated.
3512 */
3513 ieee80211_send_pspoll(local, sdata);
3514 }
3515 }
3516
3517 if (sdata->vif.p2p ||
3518 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3519 struct ieee80211_p2p_noa_attr noa = {};
3520 int ret;
3521
3522 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3523 len - baselen,
3524 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3525 (u8 *) &noa, sizeof(noa));
3526 if (ret >= 2) {
3527 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3528 /* valid noa_attr and index changed */
3529 sdata->u.mgd.p2p_noa_index = noa.index;
3530 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3531 changed |= BSS_CHANGED_P2P_PS;
3532 /*
3533 * make sure we update all information, the CRC
3534 * mechanism doesn't look at P2P attributes.
3535 */
3536 ifmgd->beacon_crc_valid = false;
3537 }
3538 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3539 /* noa_attr not found and we had valid noa_attr before */
3540 sdata->u.mgd.p2p_noa_index = -1;
3541 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3542 changed |= BSS_CHANGED_P2P_PS;
3543 ifmgd->beacon_crc_valid = false;
3544 }
3545 }
3546
3547 if (ifmgd->csa_waiting_bcn)
3548 ieee80211_chswitch_post_beacon(sdata);
3549
3550 /*
3551 * Update beacon timing and dtim count on every beacon appearance. This
3552 * will allow the driver to use the most updated values. Do it before
3553 * comparing this one with last received beacon.
3554 * IMPORTANT: These parameters would possibly be out of sync by the time
3555 * the driver will use them. The synchronized view is currently
3556 * guaranteed only in certain callbacks.
3557 */
3558 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3559 sdata->vif.bss_conf.sync_tsf =
3560 le64_to_cpu(mgmt->u.beacon.timestamp);
3561 sdata->vif.bss_conf.sync_device_ts =
3562 rx_status->device_timestamp;
3563 if (elems.tim)
3564 sdata->vif.bss_conf.sync_dtim_count =
3565 elems.tim->dtim_count;
3566 else
3567 sdata->vif.bss_conf.sync_dtim_count = 0;
3568 }
3569
3570 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3571 return;
3572 ifmgd->beacon_crc = ncrc;
3573 ifmgd->beacon_crc_valid = true;
3574
3575 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3576
3577 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3578 rx_status->device_timestamp,
3579 &elems, true);
3580
3581 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3582 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3583 elems.wmm_param_len))
3584 changed |= BSS_CHANGED_QOS;
3585
3586 /*
3587 * If we haven't had a beacon before, tell the driver about the
3588 * DTIM period (and beacon timing if desired) now.
3589 */
3590 if (!ifmgd->have_beacon) {
3591 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3592 if (elems.tim)
3593 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3594 else
3595 bss_conf->dtim_period = 1;
3596
3597 changed |= BSS_CHANGED_BEACON_INFO;
3598 ifmgd->have_beacon = true;
3599
3600 mutex_lock(&local->iflist_mtx);
3601 ieee80211_recalc_ps(local);
3602 mutex_unlock(&local->iflist_mtx);
3603
3604 ieee80211_recalc_ps_vif(sdata);
3605 }
3606
3607 if (elems.erp_info) {
3608 erp_valid = true;
3609 erp_value = elems.erp_info[0];
3610 } else {
3611 erp_valid = false;
3612 }
3613 changed |= ieee80211_handle_bss_capability(sdata,
3614 le16_to_cpu(mgmt->u.beacon.capab_info),
3615 erp_valid, erp_value);
3616
3617 mutex_lock(&local->sta_mtx);
3618 sta = sta_info_get(sdata, bssid);
3619
3620 if (ieee80211_config_bw(sdata, sta,
3621 elems.ht_cap_elem, elems.ht_operation,
3622 elems.vht_operation, bssid, &changed)) {
3623 mutex_unlock(&local->sta_mtx);
3624 sdata_info(sdata,
3625 "failed to follow AP %pM bandwidth change, disconnect\n",
3626 bssid);
3627 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3628 WLAN_REASON_DEAUTH_LEAVING,
3629 true, deauth_buf);
3630 ieee80211_report_disconnect(sdata, deauth_buf,
3631 sizeof(deauth_buf), true,
3632 WLAN_REASON_DEAUTH_LEAVING);
3633 return;
3634 }
3635
3636 if (sta && elems.opmode_notif)
3637 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3638 rx_status->band);
3639 mutex_unlock(&local->sta_mtx);
3640
3641 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3642 elems.country_elem,
3643 elems.country_elem_len,
3644 elems.pwr_constr_elem,
3645 elems.cisco_dtpc_elem);
3646
3647 ieee80211_bss_info_change_notify(sdata, changed);
3648 }
3649
3650 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3651 struct sk_buff *skb)
3652 {
3653 struct ieee80211_rx_status *rx_status;
3654 struct ieee80211_mgmt *mgmt;
3655 u16 fc;
3656 struct ieee802_11_elems elems;
3657 int ies_len;
3658
3659 rx_status = (struct ieee80211_rx_status *) skb->cb;
3660 mgmt = (struct ieee80211_mgmt *) skb->data;
3661 fc = le16_to_cpu(mgmt->frame_control);
3662
3663 sdata_lock(sdata);
3664
3665 switch (fc & IEEE80211_FCTL_STYPE) {
3666 case IEEE80211_STYPE_BEACON:
3667 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3668 break;
3669 case IEEE80211_STYPE_PROBE_RESP:
3670 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3671 break;
3672 case IEEE80211_STYPE_AUTH:
3673 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3674 break;
3675 case IEEE80211_STYPE_DEAUTH:
3676 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3677 break;
3678 case IEEE80211_STYPE_DISASSOC:
3679 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3680 break;
3681 case IEEE80211_STYPE_ASSOC_RESP:
3682 case IEEE80211_STYPE_REASSOC_RESP:
3683 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3684 break;
3685 case IEEE80211_STYPE_ACTION:
3686 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3687 ies_len = skb->len -
3688 offsetof(struct ieee80211_mgmt,
3689 u.action.u.chan_switch.variable);
3690
3691 if (ies_len < 0)
3692 break;
3693
3694 ieee802_11_parse_elems(
3695 mgmt->u.action.u.chan_switch.variable,
3696 ies_len, true, &elems);
3697
3698 if (elems.parse_error)
3699 break;
3700
3701 ieee80211_sta_process_chanswitch(sdata,
3702 rx_status->mactime,
3703 rx_status->device_timestamp,
3704 &elems, false);
3705 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3706 ies_len = skb->len -
3707 offsetof(struct ieee80211_mgmt,
3708 u.action.u.ext_chan_switch.variable);
3709
3710 if (ies_len < 0)
3711 break;
3712
3713 ieee802_11_parse_elems(
3714 mgmt->u.action.u.ext_chan_switch.variable,
3715 ies_len, true, &elems);
3716
3717 if (elems.parse_error)
3718 break;
3719
3720 /* for the handling code pretend this was also an IE */
3721 elems.ext_chansw_ie =
3722 &mgmt->u.action.u.ext_chan_switch.data;
3723
3724 ieee80211_sta_process_chanswitch(sdata,
3725 rx_status->mactime,
3726 rx_status->device_timestamp,
3727 &elems, false);
3728 }
3729 break;
3730 }
3731 sdata_unlock(sdata);
3732 }
3733
3734 static void ieee80211_sta_timer(unsigned long data)
3735 {
3736 struct ieee80211_sub_if_data *sdata =
3737 (struct ieee80211_sub_if_data *) data;
3738
3739 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3740 }
3741
3742 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3743 u8 *bssid, u8 reason, bool tx)
3744 {
3745 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3746
3747 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3748 tx, frame_buf);
3749
3750 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3751 reason);
3752 }
3753
3754 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3755 {
3756 struct ieee80211_local *local = sdata->local;
3757 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3758 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3759 u32 tx_flags = 0;
3760 u16 trans = 1;
3761 u16 status = 0;
3762
3763 sdata_assert_lock(sdata);
3764
3765 if (WARN_ON_ONCE(!auth_data))
3766 return -EINVAL;
3767
3768 auth_data->tries++;
3769
3770 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3771 sdata_info(sdata, "authentication with %pM timed out\n",
3772 auth_data->bss->bssid);
3773
3774 /*
3775 * Most likely AP is not in the range so remove the
3776 * bss struct for that AP.
3777 */
3778 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3779
3780 return -ETIMEDOUT;
3781 }
3782
3783 drv_mgd_prepare_tx(local, sdata);
3784
3785 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3786 auth_data->bss->bssid, auth_data->tries,
3787 IEEE80211_AUTH_MAX_TRIES);
3788
3789 auth_data->expected_transaction = 2;
3790
3791 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3792 trans = auth_data->sae_trans;
3793 status = auth_data->sae_status;
3794 auth_data->expected_transaction = trans;
3795 }
3796
3797 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3798 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3799 IEEE80211_TX_INTFL_MLME_CONN_TX;
3800
3801 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3802 auth_data->data, auth_data->data_len,
3803 auth_data->bss->bssid,
3804 auth_data->bss->bssid, NULL, 0, 0,
3805 tx_flags);
3806
3807 if (tx_flags == 0) {
3808 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3809 auth_data->timeout_started = true;
3810 run_again(sdata, auth_data->timeout);
3811 } else {
3812 auth_data->timeout =
3813 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3814 auth_data->timeout_started = true;
3815 run_again(sdata, auth_data->timeout);
3816 }
3817
3818 return 0;
3819 }
3820
3821 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3822 {
3823 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3824 struct ieee80211_local *local = sdata->local;
3825
3826 sdata_assert_lock(sdata);
3827
3828 assoc_data->tries++;
3829 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3830 sdata_info(sdata, "association with %pM timed out\n",
3831 assoc_data->bss->bssid);
3832
3833 /*
3834 * Most likely AP is not in the range so remove the
3835 * bss struct for that AP.
3836 */
3837 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3838
3839 return -ETIMEDOUT;
3840 }
3841
3842 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3843 assoc_data->bss->bssid, assoc_data->tries,
3844 IEEE80211_ASSOC_MAX_TRIES);
3845 ieee80211_send_assoc(sdata);
3846
3847 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3848 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3849 assoc_data->timeout_started = true;
3850 run_again(sdata, assoc_data->timeout);
3851 } else {
3852 assoc_data->timeout =
3853 round_jiffies_up(jiffies +
3854 IEEE80211_ASSOC_TIMEOUT_LONG);
3855 assoc_data->timeout_started = true;
3856 run_again(sdata, assoc_data->timeout);
3857 }
3858
3859 return 0;
3860 }
3861
3862 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3863 __le16 fc, bool acked)
3864 {
3865 struct ieee80211_local *local = sdata->local;
3866
3867 sdata->u.mgd.status_fc = fc;
3868 sdata->u.mgd.status_acked = acked;
3869 sdata->u.mgd.status_received = true;
3870
3871 ieee80211_queue_work(&local->hw, &sdata->work);
3872 }
3873
3874 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3875 {
3876 struct ieee80211_local *local = sdata->local;
3877 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3878
3879 sdata_lock(sdata);
3880
3881 if (ifmgd->status_received) {
3882 __le16 fc = ifmgd->status_fc;
3883 bool status_acked = ifmgd->status_acked;
3884
3885 ifmgd->status_received = false;
3886 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3887 if (status_acked) {
3888 ifmgd->auth_data->timeout =
3889 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3890 run_again(sdata, ifmgd->auth_data->timeout);
3891 } else {
3892 ifmgd->auth_data->timeout = jiffies - 1;
3893 }
3894 ifmgd->auth_data->timeout_started = true;
3895 } else if (ifmgd->assoc_data &&
3896 (ieee80211_is_assoc_req(fc) ||
3897 ieee80211_is_reassoc_req(fc))) {
3898 if (status_acked) {
3899 ifmgd->assoc_data->timeout =
3900 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3901 run_again(sdata, ifmgd->assoc_data->timeout);
3902 } else {
3903 ifmgd->assoc_data->timeout = jiffies - 1;
3904 }
3905 ifmgd->assoc_data->timeout_started = true;
3906 }
3907 }
3908
3909 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3910 time_after(jiffies, ifmgd->auth_data->timeout)) {
3911 if (ifmgd->auth_data->done) {
3912 /*
3913 * ok ... we waited for assoc but userspace didn't,
3914 * so let's just kill the auth data
3915 */
3916 ieee80211_destroy_auth_data(sdata, false);
3917 } else if (ieee80211_auth(sdata)) {
3918 u8 bssid[ETH_ALEN];
3919 struct ieee80211_event event = {
3920 .type = MLME_EVENT,
3921 .u.mlme.data = AUTH_EVENT,
3922 .u.mlme.status = MLME_TIMEOUT,
3923 };
3924
3925 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3926
3927 ieee80211_destroy_auth_data(sdata, false);
3928
3929 cfg80211_auth_timeout(sdata->dev, bssid);
3930 drv_event_callback(sdata->local, sdata, &event);
3931 }
3932 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3933 run_again(sdata, ifmgd->auth_data->timeout);
3934
3935 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3936 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3937 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3938 ieee80211_do_assoc(sdata)) {
3939 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3940 struct ieee80211_event event = {
3941 .type = MLME_EVENT,
3942 .u.mlme.data = ASSOC_EVENT,
3943 .u.mlme.status = MLME_TIMEOUT,
3944 };
3945
3946 ieee80211_destroy_assoc_data(sdata, false, false);
3947 cfg80211_assoc_timeout(sdata->dev, bss);
3948 drv_event_callback(sdata->local, sdata, &event);
3949 }
3950 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3951 run_again(sdata, ifmgd->assoc_data->timeout);
3952
3953 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3954 ifmgd->associated) {
3955 u8 bssid[ETH_ALEN];
3956 int max_tries;
3957
3958 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3959
3960 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3961 max_tries = max_nullfunc_tries;
3962 else
3963 max_tries = max_probe_tries;
3964
3965 /* ACK received for nullfunc probing frame */
3966 if (!ifmgd->probe_send_count)
3967 ieee80211_reset_ap_probe(sdata);
3968 else if (ifmgd->nullfunc_failed) {
3969 if (ifmgd->probe_send_count < max_tries) {
3970 mlme_dbg(sdata,
3971 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3972 bssid, ifmgd->probe_send_count,
3973 max_tries);
3974 ieee80211_mgd_probe_ap_send(sdata);
3975 } else {
3976 mlme_dbg(sdata,
3977 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3978 bssid);
3979 ieee80211_sta_connection_lost(sdata, bssid,
3980 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3981 false);
3982 }
3983 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3984 run_again(sdata, ifmgd->probe_timeout);
3985 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3986 mlme_dbg(sdata,
3987 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3988 bssid, probe_wait_ms);
3989 ieee80211_sta_connection_lost(sdata, bssid,
3990 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3991 } else if (ifmgd->probe_send_count < max_tries) {
3992 mlme_dbg(sdata,
3993 "No probe response from AP %pM after %dms, try %d/%i\n",
3994 bssid, probe_wait_ms,
3995 ifmgd->probe_send_count, max_tries);
3996 ieee80211_mgd_probe_ap_send(sdata);
3997 } else {
3998 /*
3999 * We actually lost the connection ... or did we?
4000 * Let's make sure!
4001 */
4002 mlme_dbg(sdata,
4003 "No probe response from AP %pM after %dms, disconnecting.\n",
4004 bssid, probe_wait_ms);
4005
4006 ieee80211_sta_connection_lost(sdata, bssid,
4007 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4008 }
4009 }
4010
4011 sdata_unlock(sdata);
4012 }
4013
4014 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
4015 {
4016 struct ieee80211_sub_if_data *sdata =
4017 (struct ieee80211_sub_if_data *) data;
4018 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4019
4020 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4021 return;
4022
4023 sdata->u.mgd.connection_loss = false;
4024 ieee80211_queue_work(&sdata->local->hw,
4025 &sdata->u.mgd.beacon_connection_loss_work);
4026 }
4027
4028 static void ieee80211_sta_conn_mon_timer(unsigned long data)
4029 {
4030 struct ieee80211_sub_if_data *sdata =
4031 (struct ieee80211_sub_if_data *) data;
4032 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4033 struct ieee80211_local *local = sdata->local;
4034
4035 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4036 return;
4037
4038 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4039 }
4040
4041 static void ieee80211_sta_monitor_work(struct work_struct *work)
4042 {
4043 struct ieee80211_sub_if_data *sdata =
4044 container_of(work, struct ieee80211_sub_if_data,
4045 u.mgd.monitor_work);
4046
4047 ieee80211_mgd_probe_ap(sdata, false);
4048 }
4049
4050 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4051 {
4052 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4053 __ieee80211_stop_poll(sdata);
4054
4055 /* let's probe the connection once */
4056 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4057 ieee80211_queue_work(&sdata->local->hw,
4058 &sdata->u.mgd.monitor_work);
4059 }
4060 }
4061
4062 #ifdef CONFIG_PM
4063 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4064 {
4065 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4066 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4067
4068 sdata_lock(sdata);
4069
4070 if (ifmgd->auth_data || ifmgd->assoc_data) {
4071 const u8 *bssid = ifmgd->auth_data ?
4072 ifmgd->auth_data->bss->bssid :
4073 ifmgd->assoc_data->bss->bssid;
4074
4075 /*
4076 * If we are trying to authenticate / associate while suspending,
4077 * cfg80211 won't know and won't actually abort those attempts,
4078 * thus we need to do that ourselves.
4079 */
4080 ieee80211_send_deauth_disassoc(sdata, bssid,
4081 IEEE80211_STYPE_DEAUTH,
4082 WLAN_REASON_DEAUTH_LEAVING,
4083 false, frame_buf);
4084 if (ifmgd->assoc_data)
4085 ieee80211_destroy_assoc_data(sdata, false, true);
4086 if (ifmgd->auth_data)
4087 ieee80211_destroy_auth_data(sdata, false);
4088 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4089 IEEE80211_DEAUTH_FRAME_LEN);
4090 }
4091
4092 /* This is a bit of a hack - we should find a better and more generic
4093 * solution to this. Normally when suspending, cfg80211 will in fact
4094 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4095 * auth (not so important) or assoc (this is the problem) process.
4096 *
4097 * As a consequence, it can happen that we are in the process of both
4098 * associating and suspending, and receive an association response
4099 * after cfg80211 has checked if it needs to disconnect, but before
4100 * we actually set the flag to drop incoming frames. This will then
4101 * cause the workqueue flush to process the association response in
4102 * the suspend, resulting in a successful association just before it
4103 * tries to remove the interface from the driver, which now though
4104 * has a channel context assigned ... this results in issues.
4105 *
4106 * To work around this (for now) simply deauth here again if we're
4107 * now connected.
4108 */
4109 if (ifmgd->associated && !sdata->local->wowlan) {
4110 u8 bssid[ETH_ALEN];
4111 struct cfg80211_deauth_request req = {
4112 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4113 .bssid = bssid,
4114 };
4115
4116 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4117 ieee80211_mgd_deauth(sdata, &req);
4118 }
4119
4120 sdata_unlock(sdata);
4121 }
4122
4123 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4124 {
4125 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4126
4127 sdata_lock(sdata);
4128 if (!ifmgd->associated) {
4129 sdata_unlock(sdata);
4130 return;
4131 }
4132
4133 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4134 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4135 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4136 ieee80211_sta_connection_lost(sdata,
4137 ifmgd->associated->bssid,
4138 WLAN_REASON_UNSPECIFIED,
4139 true);
4140 sdata_unlock(sdata);
4141 return;
4142 }
4143 sdata_unlock(sdata);
4144 }
4145 #endif
4146
4147 /* interface setup */
4148 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4149 {
4150 struct ieee80211_if_managed *ifmgd;
4151
4152 ifmgd = &sdata->u.mgd;
4153 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4154 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4155 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4156 ieee80211_beacon_connection_loss_work);
4157 INIT_WORK(&ifmgd->csa_connection_drop_work,
4158 ieee80211_csa_connection_drop_work);
4159 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4160 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4161 ieee80211_tdls_peer_del_work);
4162 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4163 (unsigned long) sdata);
4164 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4165 (unsigned long) sdata);
4166 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4167 (unsigned long) sdata);
4168 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4169 (unsigned long) sdata);
4170 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4171 ieee80211_sta_handle_tspec_ac_params_wk);
4172
4173 ifmgd->flags = 0;
4174 ifmgd->powersave = sdata->wdev.ps;
4175 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4176 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4177 ifmgd->p2p_noa_index = -1;
4178
4179 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4180 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4181 else
4182 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4183
4184 /* Setup TDLS data */
4185 spin_lock_init(&ifmgd->teardown_lock);
4186 ifmgd->teardown_skb = NULL;
4187 ifmgd->orig_teardown_skb = NULL;
4188 }
4189
4190 /* scan finished notification */
4191 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4192 {
4193 struct ieee80211_sub_if_data *sdata;
4194
4195 /* Restart STA timers */
4196 rcu_read_lock();
4197 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4198 if (ieee80211_sdata_running(sdata))
4199 ieee80211_restart_sta_timer(sdata);
4200 }
4201 rcu_read_unlock();
4202 }
4203
4204 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4205 struct cfg80211_bss *cbss)
4206 {
4207 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4208 const u8 *ht_cap_ie, *vht_cap_ie;
4209 const struct ieee80211_ht_cap *ht_cap;
4210 const struct ieee80211_vht_cap *vht_cap;
4211 u8 chains = 1;
4212
4213 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4214 return chains;
4215
4216 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4217 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4218 ht_cap = (void *)(ht_cap_ie + 2);
4219 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4220 /*
4221 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4222 * "Tx Unequal Modulation Supported" fields.
4223 */
4224 }
4225
4226 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4227 return chains;
4228
4229 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4230 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4231 u8 nss;
4232 u16 tx_mcs_map;
4233
4234 vht_cap = (void *)(vht_cap_ie + 2);
4235 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4236 for (nss = 8; nss > 0; nss--) {
4237 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4238 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4239 break;
4240 }
4241 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4242 chains = max(chains, nss);
4243 }
4244
4245 return chains;
4246 }
4247
4248 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4249 struct cfg80211_bss *cbss)
4250 {
4251 struct ieee80211_local *local = sdata->local;
4252 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4253 const struct ieee80211_ht_cap *ht_cap = NULL;
4254 const struct ieee80211_ht_operation *ht_oper = NULL;
4255 const struct ieee80211_vht_operation *vht_oper = NULL;
4256 struct ieee80211_supported_band *sband;
4257 struct cfg80211_chan_def chandef;
4258 int ret;
4259 u32 i;
4260 bool have_80mhz;
4261
4262 sband = local->hw.wiphy->bands[cbss->channel->band];
4263
4264 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4265 IEEE80211_STA_DISABLE_80P80MHZ |
4266 IEEE80211_STA_DISABLE_160MHZ);
4267
4268 rcu_read_lock();
4269
4270 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4271 sband->ht_cap.ht_supported) {
4272 const u8 *ht_oper_ie, *ht_cap_ie;
4273
4274 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4275 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4276 ht_oper = (void *)(ht_oper_ie + 2);
4277
4278 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4279 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4280 ht_cap = (void *)(ht_cap_ie + 2);
4281
4282 if (!ht_cap) {
4283 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4284 ht_oper = NULL;
4285 }
4286 }
4287
4288 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4289 sband->vht_cap.vht_supported) {
4290 const u8 *vht_oper_ie, *vht_cap;
4291
4292 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4293 WLAN_EID_VHT_OPERATION);
4294 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4295 vht_oper = (void *)(vht_oper_ie + 2);
4296 if (vht_oper && !ht_oper) {
4297 vht_oper = NULL;
4298 sdata_info(sdata,
4299 "AP advertised VHT without HT, disabling both\n");
4300 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4301 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4302 }
4303
4304 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4305 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4306 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4307 vht_oper = NULL;
4308 }
4309 }
4310
4311 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4312 have_80mhz = false;
4313 for (i = 0; i < sband->n_channels; i++) {
4314 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4315 IEEE80211_CHAN_NO_80MHZ))
4316 continue;
4317
4318 have_80mhz = true;
4319 break;
4320 }
4321
4322 if (!have_80mhz)
4323 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4324
4325 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4326 cbss->channel,
4327 ht_cap, ht_oper, vht_oper,
4328 &chandef, false);
4329
4330 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4331 local->rx_chains);
4332
4333 rcu_read_unlock();
4334
4335 /* will change later if needed */
4336 sdata->smps_mode = IEEE80211_SMPS_OFF;
4337
4338 mutex_lock(&local->mtx);
4339 /*
4340 * If this fails (possibly due to channel context sharing
4341 * on incompatible channels, e.g. 80+80 and 160 sharing the
4342 * same control channel) try to use a smaller bandwidth.
4343 */
4344 ret = ieee80211_vif_use_channel(sdata, &chandef,
4345 IEEE80211_CHANCTX_SHARED);
4346
4347 /* don't downgrade for 5 and 10 MHz channels, though. */
4348 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4349 chandef.width == NL80211_CHAN_WIDTH_10)
4350 goto out;
4351
4352 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4353 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4354 ret = ieee80211_vif_use_channel(sdata, &chandef,
4355 IEEE80211_CHANCTX_SHARED);
4356 }
4357 out:
4358 mutex_unlock(&local->mtx);
4359 return ret;
4360 }
4361
4362 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4363 struct cfg80211_bss *cbss, bool assoc,
4364 bool override)
4365 {
4366 struct ieee80211_local *local = sdata->local;
4367 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4368 struct ieee80211_bss *bss = (void *)cbss->priv;
4369 struct sta_info *new_sta = NULL;
4370 struct ieee80211_supported_band *sband;
4371 bool have_sta = false;
4372 int err;
4373
4374 sband = local->hw.wiphy->bands[cbss->channel->band];
4375
4376 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4377 return -EINVAL;
4378
4379 /* If a reconfig is happening, bail out */
4380 if (local->in_reconfig)
4381 return -EBUSY;
4382
4383 if (assoc) {
4384 rcu_read_lock();
4385 have_sta = sta_info_get(sdata, cbss->bssid);
4386 rcu_read_unlock();
4387 }
4388
4389 if (!have_sta) {
4390 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4391 if (!new_sta)
4392 return -ENOMEM;
4393 }
4394
4395 /*
4396 * Set up the information for the new channel before setting the
4397 * new channel. We can't - completely race-free - change the basic
4398 * rates bitmap and the channel (sband) that it refers to, but if
4399 * we set it up before we at least avoid calling into the driver's
4400 * bss_info_changed() method with invalid information (since we do
4401 * call that from changing the channel - only for IDLE and perhaps
4402 * some others, but ...).
4403 *
4404 * So to avoid that, just set up all the new information before the
4405 * channel, but tell the driver to apply it only afterwards, since
4406 * it might need the new channel for that.
4407 */
4408 if (new_sta) {
4409 u32 rates = 0, basic_rates = 0;
4410 bool have_higher_than_11mbit;
4411 int min_rate = INT_MAX, min_rate_index = -1;
4412 const struct cfg80211_bss_ies *ies;
4413 int shift = ieee80211_vif_get_shift(&sdata->vif);
4414
4415 ieee80211_get_rates(sband, bss->supp_rates,
4416 bss->supp_rates_len,
4417 &rates, &basic_rates,
4418 &have_higher_than_11mbit,
4419 &min_rate, &min_rate_index,
4420 shift);
4421
4422 /*
4423 * This used to be a workaround for basic rates missing
4424 * in the association response frame. Now that we no
4425 * longer use the basic rates from there, it probably
4426 * doesn't happen any more, but keep the workaround so
4427 * in case some *other* APs are buggy in different ways
4428 * we can connect -- with a warning.
4429 */
4430 if (!basic_rates && min_rate_index >= 0) {
4431 sdata_info(sdata,
4432 "No basic rates, using min rate instead\n");
4433 basic_rates = BIT(min_rate_index);
4434 }
4435
4436 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4437 sdata->vif.bss_conf.basic_rates = basic_rates;
4438
4439 /* cf. IEEE 802.11 9.2.12 */
4440 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4441 have_higher_than_11mbit)
4442 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4443 else
4444 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4445
4446 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4447
4448 /* set timing information */
4449 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4450 rcu_read_lock();
4451 ies = rcu_dereference(cbss->beacon_ies);
4452 if (ies) {
4453 const u8 *tim_ie;
4454
4455 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4456 sdata->vif.bss_conf.sync_device_ts =
4457 bss->device_ts_beacon;
4458 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4459 ies->data, ies->len);
4460 if (tim_ie && tim_ie[1] >= 2)
4461 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4462 else
4463 sdata->vif.bss_conf.sync_dtim_count = 0;
4464 } else if (!ieee80211_hw_check(&sdata->local->hw,
4465 TIMING_BEACON_ONLY)) {
4466 ies = rcu_dereference(cbss->proberesp_ies);
4467 /* must be non-NULL since beacon IEs were NULL */
4468 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4469 sdata->vif.bss_conf.sync_device_ts =
4470 bss->device_ts_presp;
4471 sdata->vif.bss_conf.sync_dtim_count = 0;
4472 } else {
4473 sdata->vif.bss_conf.sync_tsf = 0;
4474 sdata->vif.bss_conf.sync_device_ts = 0;
4475 sdata->vif.bss_conf.sync_dtim_count = 0;
4476 }
4477 rcu_read_unlock();
4478 }
4479
4480 if (new_sta || override) {
4481 err = ieee80211_prep_channel(sdata, cbss);
4482 if (err) {
4483 if (new_sta)
4484 sta_info_free(local, new_sta);
4485 return -EINVAL;
4486 }
4487 }
4488
4489 if (new_sta) {
4490 /*
4491 * tell driver about BSSID, basic rates and timing
4492 * this was set up above, before setting the channel
4493 */
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);