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