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Linux 5.1.15
[linux/fpc-iii.git] / net / mac80211 / mlme.c
blob383b0df100e4b974f7a888b509f1973704a7816a
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 - 2019 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, *ie_start;
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 ie_start = pos;
756 *pos++ = WLAN_EID_SSID;
757 *pos++ = assoc_data->ssid_len;
758 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
759
760 /* add all rates which were marked to be used above */
761 supp_rates_len = rates_len;
762 if (supp_rates_len > 8)
763 supp_rates_len = 8;
764
765 pos = skb_put(skb, supp_rates_len + 2);
766 *pos++ = WLAN_EID_SUPP_RATES;
767 *pos++ = supp_rates_len;
768
769 count = 0;
770 for (i = 0; i < sband->n_bitrates; i++) {
771 if (BIT(i) & rates) {
772 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
773 5 * (1 << shift));
774 *pos++ = (u8) rate;
775 if (++count == 8)
776 break;
777 }
778 }
779
780 if (rates_len > count) {
781 pos = skb_put(skb, rates_len - count + 2);
782 *pos++ = WLAN_EID_EXT_SUPP_RATES;
783 *pos++ = rates_len - count;
784
785 for (i++; i < sband->n_bitrates; i++) {
786 if (BIT(i) & rates) {
787 int rate;
788 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
789 5 * (1 << shift));
790 *pos++ = (u8) rate;
791 }
792 }
793 }
794
795 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
796 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
797 pos = skb_put(skb, 4);
798 *pos++ = WLAN_EID_PWR_CAPABILITY;
799 *pos++ = 2;
800 *pos++ = 0; /* min tx power */
801 /* max tx power */
802 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
803 }
804
805 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
806 /* TODO: get this in reg domain format */
807 pos = skb_put(skb, 2 * sband->n_channels + 2);
808 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
809 *pos++ = 2 * sband->n_channels;
810 for (i = 0; i < sband->n_channels; i++) {
811 *pos++ = ieee80211_frequency_to_channel(
812 sband->channels[i].center_freq);
813 *pos++ = 1; /* one channel in the subband*/
814 }
815 }
816
817 /* Set MBSSID support for HE AP if needed */
818 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) &&
819 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len) {
820 struct element *elem;
821
822 /* we know it's writable, cast away the const */
823 elem = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
824 assoc_data->ie,
825 assoc_data->ie_len);
826
827 /* We can probably assume both always true */
828 if (elem && elem->datalen >= 3)
829 elem->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
830 }
831
832 /* if present, add any custom IEs that go before HT */
833 if (assoc_data->ie_len) {
834 static const u8 before_ht[] = {
835 WLAN_EID_SSID,
836 WLAN_EID_SUPP_RATES,
837 WLAN_EID_EXT_SUPP_RATES,
838 WLAN_EID_PWR_CAPABILITY,
839 WLAN_EID_SUPPORTED_CHANNELS,
840 WLAN_EID_RSN,
841 WLAN_EID_QOS_CAPA,
842 WLAN_EID_RRM_ENABLED_CAPABILITIES,
843 WLAN_EID_MOBILITY_DOMAIN,
844 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
845 WLAN_EID_RIC_DATA, /* reassoc only */
846 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
847 };
848 static const u8 after_ric[] = {
849 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
850 WLAN_EID_HT_CAPABILITY,
851 WLAN_EID_BSS_COEX_2040,
852 /* luckily this is almost always there */
853 WLAN_EID_EXT_CAPABILITY,
854 WLAN_EID_QOS_TRAFFIC_CAPA,
855 WLAN_EID_TIM_BCAST_REQ,
856 WLAN_EID_INTERWORKING,
857 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
858 WLAN_EID_VHT_CAPABILITY,
859 WLAN_EID_OPMODE_NOTIF,
860 };
861
862 noffset = ieee80211_ie_split_ric(assoc_data->ie,
863 assoc_data->ie_len,
864 before_ht,
865 ARRAY_SIZE(before_ht),
866 after_ric,
867 ARRAY_SIZE(after_ric),
868 offset);
869 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
870 offset = noffset;
871 }
872
873 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
874 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
875 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
876
877 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
878 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
879 sband, chan, sdata->smps_mode);
880
881 /* if present, add any custom IEs that go before VHT */
882 if (assoc_data->ie_len) {
883 static const u8 before_vht[] = {
884 /*
885 * no need to list the ones split off before HT
886 * or generated here
887 */
888 WLAN_EID_BSS_COEX_2040,
889 WLAN_EID_EXT_CAPABILITY,
890 WLAN_EID_QOS_TRAFFIC_CAPA,
891 WLAN_EID_TIM_BCAST_REQ,
892 WLAN_EID_INTERWORKING,
893 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
894 };
895
896 /* RIC already taken above, so no need to handle here anymore */
897 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
898 before_vht, ARRAY_SIZE(before_vht),
899 offset);
900 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
901 offset = noffset;
902 }
903
904 /* if present, add any custom IEs that go before HE */
905 if (assoc_data->ie_len) {
906 static const u8 before_he[] = {
907 /*
908 * no need to list the ones split off before VHT
909 * or generated here
910 */
911 WLAN_EID_OPMODE_NOTIF,
912 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
913 /* 11ai elements */
914 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
915 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
916 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
917 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
918 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
919 /* TODO: add 11ah/11aj/11ak elements */
920 };
921
922 /* RIC already taken above, so no need to handle here anymore */
923 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
924 before_he, ARRAY_SIZE(before_he),
925 offset);
926 pos = skb_put(skb, noffset - offset);
927 memcpy(pos, assoc_data->ie + offset, noffset - offset);
928 offset = noffset;
929 }
930
931 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
932 ieee80211_add_vht_ie(sdata, skb, sband,
933 &assoc_data->ap_vht_cap);
934
935 /*
936 * If AP doesn't support HT, mark HE as disabled.
937 * If on the 5GHz band, make sure it supports VHT.
938 */
939 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT ||
940 (sband->band == NL80211_BAND_5GHZ &&
941 ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
942 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
943
944 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
945 ieee80211_add_he_ie(sdata, skb, sband);
946
947 /* if present, add any custom non-vendor IEs that go after HE */
948 if (assoc_data->ie_len) {
949 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
950 assoc_data->ie_len,
951 offset);
952 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
953 offset = noffset;
954 }
955
956 if (assoc_data->wmm) {
957 if (assoc_data->uapsd) {
958 qos_info = ifmgd->uapsd_queues;
959 qos_info |= (ifmgd->uapsd_max_sp_len <<
960 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
961 } else {
962 qos_info = 0;
963 }
964
965 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
966 }
967
968 /* add any remaining custom (i.e. vendor specific here) IEs */
969 if (assoc_data->ie_len) {
970 noffset = assoc_data->ie_len;
971 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
972 }
973
974 if (assoc_data->fils_kek_len &&
975 fils_encrypt_assoc_req(skb, assoc_data) < 0) {
976 dev_kfree_skb(skb);
977 return;
978 }
979
980 pos = skb_tail_pointer(skb);
981 kfree(ifmgd->assoc_req_ies);
982 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC);
983 ifmgd->assoc_req_ies_len = pos - ie_start;
984
985 drv_mgd_prepare_tx(local, sdata, 0);
986
987 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
988 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
989 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
990 IEEE80211_TX_INTFL_MLME_CONN_TX;
991 ieee80211_tx_skb(sdata, skb);
992 }
993
994 void ieee80211_send_pspoll(struct ieee80211_local *local,
995 struct ieee80211_sub_if_data *sdata)
996 {
997 struct ieee80211_pspoll *pspoll;
998 struct sk_buff *skb;
999
1000 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
1001 if (!skb)
1002 return;
1003
1004 pspoll = (struct ieee80211_pspoll *) skb->data;
1005 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1006
1007 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1008 ieee80211_tx_skb(sdata, skb);
1009 }
1010
1011 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1012 struct ieee80211_sub_if_data *sdata,
1013 bool powersave)
1014 {
1015 struct sk_buff *skb;
1016 struct ieee80211_hdr_3addr *nullfunc;
1017 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1018
1019 /* Don't send NDPs when STA is connected HE */
1020 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1021 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
1022 return;
1023
1024 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
1025 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
1026 if (!skb)
1027 return;
1028
1029 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
1030 if (powersave)
1031 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1032
1033 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1034 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1035
1036 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1037 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
1038
1039 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1040 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1041
1042 ieee80211_tx_skb(sdata, skb);
1043 }
1044
1045 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
1046 struct ieee80211_sub_if_data *sdata)
1047 {
1048 struct sk_buff *skb;
1049 struct ieee80211_hdr *nullfunc;
1050 __le16 fc;
1051
1052 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1053 return;
1054
1055 /* Don't send NDPs when connected HE */
1056 if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE))
1057 return;
1058
1059 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1060 if (!skb)
1061 return;
1062
1063 skb_reserve(skb, local->hw.extra_tx_headroom);
1064
1065 nullfunc = skb_put_zero(skb, 30);
1066 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
1067 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1068 nullfunc->frame_control = fc;
1069 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
1070 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1071 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
1072 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
1073
1074 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1075 ieee80211_tx_skb(sdata, skb);
1076 }
1077
1078 /* spectrum management related things */
1079 static void ieee80211_chswitch_work(struct work_struct *work)
1080 {
1081 struct ieee80211_sub_if_data *sdata =
1082 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
1083 struct ieee80211_local *local = sdata->local;
1084 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1085 int ret;
1086
1087 if (!ieee80211_sdata_running(sdata))
1088 return;
1089
1090 sdata_lock(sdata);
1091 mutex_lock(&local->mtx);
1092 mutex_lock(&local->chanctx_mtx);
1093
1094 if (!ifmgd->associated)
1095 goto out;
1096
1097 if (!sdata->vif.csa_active)
1098 goto out;
1099
1100 /*
1101 * using reservation isn't immediate as it may be deferred until later
1102 * with multi-vif. once reservation is complete it will re-schedule the
1103 * work with no reserved_chanctx so verify chandef to check if it
1104 * completed successfully
1105 */
1106
1107 if (sdata->reserved_chanctx) {
1108 struct ieee80211_supported_band *sband = NULL;
1109 struct sta_info *mgd_sta = NULL;
1110 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;
1111
1112 /*
1113 * with multi-vif csa driver may call ieee80211_csa_finish()
1114 * many times while waiting for other interfaces to use their
1115 * reservations
1116 */
1117 if (sdata->reserved_ready)
1118 goto out;
1119
1120 if (sdata->vif.bss_conf.chandef.width !=
1121 sdata->csa_chandef.width) {
1122 /*
1123 * For managed interface, we need to also update the AP
1124 * station bandwidth and align the rate scale algorithm
1125 * on the bandwidth change. Here we only consider the
1126 * bandwidth of the new channel definition (as channel
1127 * switch flow does not have the full HT/VHT/HE
1128 * information), assuming that if additional changes are
1129 * required they would be done as part of the processing
1130 * of the next beacon from the AP.
1131 */
1132 switch (sdata->csa_chandef.width) {
1133 case NL80211_CHAN_WIDTH_20_NOHT:
1134 case NL80211_CHAN_WIDTH_20:
1135 default:
1136 bw = IEEE80211_STA_RX_BW_20;
1137 break;
1138 case NL80211_CHAN_WIDTH_40:
1139 bw = IEEE80211_STA_RX_BW_40;
1140 break;
1141 case NL80211_CHAN_WIDTH_80:
1142 bw = IEEE80211_STA_RX_BW_80;
1143 break;
1144 case NL80211_CHAN_WIDTH_80P80:
1145 case NL80211_CHAN_WIDTH_160:
1146 bw = IEEE80211_STA_RX_BW_160;
1147 break;
1148 }
1149
1150 mgd_sta = sta_info_get(sdata, ifmgd->bssid);
1151 sband =
1152 local->hw.wiphy->bands[sdata->csa_chandef.chan->band];
1153 }
1154
1155 if (sdata->vif.bss_conf.chandef.width >
1156 sdata->csa_chandef.width) {
1157 mgd_sta->sta.bandwidth = bw;
1158 rate_control_rate_update(local, sband, mgd_sta,
1159 IEEE80211_RC_BW_CHANGED);
1160 }
1161
1162 ret = ieee80211_vif_use_reserved_context(sdata);
1163 if (ret) {
1164 sdata_info(sdata,
1165 "failed to use reserved channel context, disconnecting (err=%d)\n",
1166 ret);
1167 ieee80211_queue_work(&sdata->local->hw,
1168 &ifmgd->csa_connection_drop_work);
1169 goto out;
1170 }
1171
1172 if (sdata->vif.bss_conf.chandef.width <
1173 sdata->csa_chandef.width) {
1174 mgd_sta->sta.bandwidth = bw;
1175 rate_control_rate_update(local, sband, mgd_sta,
1176 IEEE80211_RC_BW_CHANGED);
1177 }
1178
1179 goto out;
1180 }
1181
1182 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1183 &sdata->csa_chandef)) {
1184 sdata_info(sdata,
1185 "failed to finalize channel switch, disconnecting\n");
1186 ieee80211_queue_work(&sdata->local->hw,
1187 &ifmgd->csa_connection_drop_work);
1188 goto out;
1189 }
1190
1191 ifmgd->csa_waiting_bcn = true;
1192
1193 ieee80211_sta_reset_beacon_monitor(sdata);
1194 ieee80211_sta_reset_conn_monitor(sdata);
1195
1196 out:
1197 mutex_unlock(&local->chanctx_mtx);
1198 mutex_unlock(&local->mtx);
1199 sdata_unlock(sdata);
1200 }
1201
1202 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1203 {
1204 struct ieee80211_local *local = sdata->local;
1205 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1206 int ret;
1207
1208 sdata_assert_lock(sdata);
1209
1210 WARN_ON(!sdata->vif.csa_active);
1211
1212 if (sdata->csa_block_tx) {
1213 ieee80211_wake_vif_queues(local, sdata,
1214 IEEE80211_QUEUE_STOP_REASON_CSA);
1215 sdata->csa_block_tx = false;
1216 }
1217
1218 sdata->vif.csa_active = false;
1219 ifmgd->csa_waiting_bcn = false;
1220
1221 ret = drv_post_channel_switch(sdata);
1222 if (ret) {
1223 sdata_info(sdata,
1224 "driver post channel switch failed, disconnecting\n");
1225 ieee80211_queue_work(&local->hw,
1226 &ifmgd->csa_connection_drop_work);
1227 return;
1228 }
1229
1230 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1231 }
1232
1233 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1234 {
1235 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1236 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1237
1238 trace_api_chswitch_done(sdata, success);
1239 if (!success) {
1240 sdata_info(sdata,
1241 "driver channel switch failed, disconnecting\n");
1242 ieee80211_queue_work(&sdata->local->hw,
1243 &ifmgd->csa_connection_drop_work);
1244 } else {
1245 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1246 }
1247 }
1248 EXPORT_SYMBOL(ieee80211_chswitch_done);
1249
1250 static void ieee80211_chswitch_timer(struct timer_list *t)
1251 {
1252 struct ieee80211_sub_if_data *sdata =
1253 from_timer(sdata, t, u.mgd.chswitch_timer);
1254
1255 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1256 }
1257
1258 static void
1259 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata)
1260 {
1261 struct ieee80211_local *local = sdata->local;
1262
1263 if (!local->ops->abort_channel_switch)
1264 return;
1265
1266 mutex_lock(&local->mtx);
1267
1268 mutex_lock(&local->chanctx_mtx);
1269 ieee80211_vif_unreserve_chanctx(sdata);
1270 mutex_unlock(&local->chanctx_mtx);
1271
1272 if (sdata->csa_block_tx)
1273 ieee80211_wake_vif_queues(local, sdata,
1274 IEEE80211_QUEUE_STOP_REASON_CSA);
1275
1276 sdata->csa_block_tx = false;
1277 sdata->vif.csa_active = false;
1278
1279 mutex_unlock(&local->mtx);
1280
1281 drv_abort_channel_switch(sdata);
1282 }
1283
1284 static void
1285 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1286 u64 timestamp, u32 device_timestamp,
1287 struct ieee802_11_elems *elems,
1288 bool beacon)
1289 {
1290 struct ieee80211_local *local = sdata->local;
1291 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1292 struct cfg80211_bss *cbss = ifmgd->associated;
1293 struct ieee80211_chanctx_conf *conf;
1294 struct ieee80211_chanctx *chanctx;
1295 enum nl80211_band current_band;
1296 struct ieee80211_csa_ie csa_ie;
1297 struct ieee80211_channel_switch ch_switch;
1298 int res;
1299
1300 sdata_assert_lock(sdata);
1301
1302 if (!cbss)
1303 return;
1304
1305 if (local->scanning)
1306 return;
1307
1308 current_band = cbss->channel->band;
1309 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1310 ifmgd->flags,
1311 ifmgd->associated->bssid, &csa_ie);
1312
1313 if (!res) {
1314 ch_switch.timestamp = timestamp;
1315 ch_switch.device_timestamp = device_timestamp;
1316 ch_switch.block_tx = beacon ? csa_ie.mode : 0;
1317 ch_switch.chandef = csa_ie.chandef;
1318 ch_switch.count = csa_ie.count;
1319 ch_switch.delay = csa_ie.max_switch_time;
1320 }
1321
1322 if (res < 0) {
1323 ieee80211_queue_work(&local->hw,
1324 &ifmgd->csa_connection_drop_work);
1325 return;
1326 }
1327
1328 if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) {
1329 if (res)
1330 ieee80211_sta_abort_chanswitch(sdata);
1331 else
1332 drv_channel_switch_rx_beacon(sdata, &ch_switch);
1333 return;
1334 } else if (sdata->vif.csa_active || res) {
1335 /* disregard subsequent announcements if already processing */
1336 return;
1337 }
1338
1339 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1340 IEEE80211_CHAN_DISABLED)) {
1341 sdata_info(sdata,
1342 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1343 ifmgd->associated->bssid,
1344 csa_ie.chandef.chan->center_freq,
1345 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1346 csa_ie.chandef.center_freq2);
1347 ieee80211_queue_work(&local->hw,
1348 &ifmgd->csa_connection_drop_work);
1349 return;
1350 }
1351
1352 if (cfg80211_chandef_identical(&csa_ie.chandef,
1353 &sdata->vif.bss_conf.chandef) &&
1354 (!csa_ie.mode || !beacon)) {
1355 if (ifmgd->csa_ignored_same_chan)
1356 return;
1357 sdata_info(sdata,
1358 "AP %pM tries to chanswitch to same channel, ignore\n",
1359 ifmgd->associated->bssid);
1360 ifmgd->csa_ignored_same_chan = true;
1361 return;
1362 }
1363
1364 /*
1365 * Drop all TDLS peers - either we disconnect or move to a different
1366 * channel from this point on. There's no telling what our peer will do.
1367 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1368 * have an incompatible wider chandef.
1369 */
1370 ieee80211_teardown_tdls_peers(sdata);
1371
1372 mutex_lock(&local->mtx);
1373 mutex_lock(&local->chanctx_mtx);
1374 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1375 lockdep_is_held(&local->chanctx_mtx));
1376 if (!conf) {
1377 sdata_info(sdata,
1378 "no channel context assigned to vif?, disconnecting\n");
1379 goto drop_connection;
1380 }
1381
1382 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1383
1384 if (local->use_chanctx &&
1385 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1386 sdata_info(sdata,
1387 "driver doesn't support chan-switch with channel contexts\n");
1388 goto drop_connection;
1389 }
1390
1391 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1392 sdata_info(sdata,
1393 "preparing for channel switch failed, disconnecting\n");
1394 goto drop_connection;
1395 }
1396
1397 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1398 chanctx->mode, false);
1399 if (res) {
1400 sdata_info(sdata,
1401 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1402 res);
1403 goto drop_connection;
1404 }
1405 mutex_unlock(&local->chanctx_mtx);
1406
1407 sdata->vif.csa_active = true;
1408 sdata->csa_chandef = csa_ie.chandef;
1409 sdata->csa_block_tx = ch_switch.block_tx;
1410 ifmgd->csa_ignored_same_chan = false;
1411
1412 if (sdata->csa_block_tx)
1413 ieee80211_stop_vif_queues(local, sdata,
1414 IEEE80211_QUEUE_STOP_REASON_CSA);
1415 mutex_unlock(&local->mtx);
1416
1417 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1418 csa_ie.count);
1419
1420 if (local->ops->channel_switch) {
1421 /* use driver's channel switch callback */
1422 drv_channel_switch(local, sdata, &ch_switch);
1423 return;
1424 }
1425
1426 /* channel switch handled in software */
1427 if (csa_ie.count <= 1)
1428 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1429 else
1430 mod_timer(&ifmgd->chswitch_timer,
1431 TU_TO_EXP_TIME((csa_ie.count - 1) *
1432 cbss->beacon_interval));
1433 return;
1434 drop_connection:
1435 /*
1436 * This is just so that the disconnect flow will know that
1437 * we were trying to switch channel and failed. In case the
1438 * mode is 1 (we are not allowed to Tx), we will know not to
1439 * send a deauthentication frame. Those two fields will be
1440 * reset when the disconnection worker runs.
1441 */
1442 sdata->vif.csa_active = true;
1443 sdata->csa_block_tx = ch_switch.block_tx;
1444
1445 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1446 mutex_unlock(&local->chanctx_mtx);
1447 mutex_unlock(&local->mtx);
1448 }
1449
1450 static bool
1451 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1452 struct ieee80211_channel *channel,
1453 const u8 *country_ie, u8 country_ie_len,
1454 const u8 *pwr_constr_elem,
1455 int *chan_pwr, int *pwr_reduction)
1456 {
1457 struct ieee80211_country_ie_triplet *triplet;
1458 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1459 int i, chan_increment;
1460 bool have_chan_pwr = false;
1461
1462 /* Invalid IE */
1463 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1464 return false;
1465
1466 triplet = (void *)(country_ie + 3);
1467 country_ie_len -= 3;
1468
1469 switch (channel->band) {
1470 default:
1471 WARN_ON_ONCE(1);
1472 /* fall through */
1473 case NL80211_BAND_2GHZ:
1474 case NL80211_BAND_60GHZ:
1475 chan_increment = 1;
1476 break;
1477 case NL80211_BAND_5GHZ:
1478 chan_increment = 4;
1479 break;
1480 }
1481
1482 /* find channel */
1483 while (country_ie_len >= 3) {
1484 u8 first_channel = triplet->chans.first_channel;
1485
1486 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1487 goto next;
1488
1489 for (i = 0; i < triplet->chans.num_channels; i++) {
1490 if (first_channel + i * chan_increment == chan) {
1491 have_chan_pwr = true;
1492 *chan_pwr = triplet->chans.max_power;
1493 break;
1494 }
1495 }
1496 if (have_chan_pwr)
1497 break;
1498
1499 next:
1500 triplet++;
1501 country_ie_len -= 3;
1502 }
1503
1504 if (have_chan_pwr && pwr_constr_elem)
1505 *pwr_reduction = *pwr_constr_elem;
1506 else
1507 *pwr_reduction = 0;
1508
1509 return have_chan_pwr;
1510 }
1511
1512 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1513 struct ieee80211_channel *channel,
1514 const u8 *cisco_dtpc_ie,
1515 int *pwr_level)
1516 {
1517 /* From practical testing, the first data byte of the DTPC element
1518 * seems to contain the requested dBm level, and the CLI on Cisco
1519 * APs clearly state the range is -127 to 127 dBm, which indicates
1520 * a signed byte, although it seemingly never actually goes negative.
1521 * The other byte seems to always be zero.
1522 */
1523 *pwr_level = (__s8)cisco_dtpc_ie[4];
1524 }
1525
1526 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1527 struct ieee80211_channel *channel,
1528 struct ieee80211_mgmt *mgmt,
1529 const u8 *country_ie, u8 country_ie_len,
1530 const u8 *pwr_constr_ie,
1531 const u8 *cisco_dtpc_ie)
1532 {
1533 bool has_80211h_pwr = false, has_cisco_pwr = false;
1534 int chan_pwr = 0, pwr_reduction_80211h = 0;
1535 int pwr_level_cisco, pwr_level_80211h;
1536 int new_ap_level;
1537 __le16 capab = mgmt->u.probe_resp.capab_info;
1538
1539 if (country_ie &&
1540 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1541 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1542 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1543 sdata, channel, country_ie, country_ie_len,
1544 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1545 pwr_level_80211h =
1546 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1547 }
1548
1549 if (cisco_dtpc_ie) {
1550 ieee80211_find_cisco_dtpc(
1551 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1552 has_cisco_pwr = true;
1553 }
1554
1555 if (!has_80211h_pwr && !has_cisco_pwr)
1556 return 0;
1557
1558 /* If we have both 802.11h and Cisco DTPC, apply both limits
1559 * by picking the smallest of the two power levels advertised.
1560 */
1561 if (has_80211h_pwr &&
1562 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1563 new_ap_level = pwr_level_80211h;
1564
1565 if (sdata->ap_power_level == new_ap_level)
1566 return 0;
1567
1568 sdata_dbg(sdata,
1569 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1570 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1571 sdata->u.mgd.bssid);
1572 } else { /* has_cisco_pwr is always true here. */
1573 new_ap_level = pwr_level_cisco;
1574
1575 if (sdata->ap_power_level == new_ap_level)
1576 return 0;
1577
1578 sdata_dbg(sdata,
1579 "Limiting TX power to %d dBm as advertised by %pM\n",
1580 pwr_level_cisco, sdata->u.mgd.bssid);
1581 }
1582
1583 sdata->ap_power_level = new_ap_level;
1584 if (__ieee80211_recalc_txpower(sdata))
1585 return BSS_CHANGED_TXPOWER;
1586 return 0;
1587 }
1588
1589 /* powersave */
1590 static void ieee80211_enable_ps(struct ieee80211_local *local,
1591 struct ieee80211_sub_if_data *sdata)
1592 {
1593 struct ieee80211_conf *conf = &local->hw.conf;
1594
1595 /*
1596 * If we are scanning right now then the parameters will
1597 * take effect when scan finishes.
1598 */
1599 if (local->scanning)
1600 return;
1601
1602 if (conf->dynamic_ps_timeout > 0 &&
1603 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1604 mod_timer(&local->dynamic_ps_timer, jiffies +
1605 msecs_to_jiffies(conf->dynamic_ps_timeout));
1606 } else {
1607 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1608 ieee80211_send_nullfunc(local, sdata, true);
1609
1610 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1611 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1612 return;
1613
1614 conf->flags |= IEEE80211_CONF_PS;
1615 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1616 }
1617 }
1618
1619 static void ieee80211_change_ps(struct ieee80211_local *local)
1620 {
1621 struct ieee80211_conf *conf = &local->hw.conf;
1622
1623 if (local->ps_sdata) {
1624 ieee80211_enable_ps(local, local->ps_sdata);
1625 } else if (conf->flags & IEEE80211_CONF_PS) {
1626 conf->flags &= ~IEEE80211_CONF_PS;
1627 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1628 del_timer_sync(&local->dynamic_ps_timer);
1629 cancel_work_sync(&local->dynamic_ps_enable_work);
1630 }
1631 }
1632
1633 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1634 {
1635 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1636 struct sta_info *sta = NULL;
1637 bool authorized = false;
1638
1639 if (!mgd->powersave)
1640 return false;
1641
1642 if (mgd->broken_ap)
1643 return false;
1644
1645 if (!mgd->associated)
1646 return false;
1647
1648 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1649 return false;
1650
1651 if (!mgd->have_beacon)
1652 return false;
1653
1654 rcu_read_lock();
1655 sta = sta_info_get(sdata, mgd->bssid);
1656 if (sta)
1657 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1658 rcu_read_unlock();
1659
1660 return authorized;
1661 }
1662
1663 /* need to hold RTNL or interface lock */
1664 void ieee80211_recalc_ps(struct ieee80211_local *local)
1665 {
1666 struct ieee80211_sub_if_data *sdata, *found = NULL;
1667 int count = 0;
1668 int timeout;
1669
1670 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1671 local->ps_sdata = NULL;
1672 return;
1673 }
1674
1675 list_for_each_entry(sdata, &local->interfaces, list) {
1676 if (!ieee80211_sdata_running(sdata))
1677 continue;
1678 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1679 /* If an AP vif is found, then disable PS
1680 * by setting the count to zero thereby setting
1681 * ps_sdata to NULL.
1682 */
1683 count = 0;
1684 break;
1685 }
1686 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1687 continue;
1688 found = sdata;
1689 count++;
1690 }
1691
1692 if (count == 1 && ieee80211_powersave_allowed(found)) {
1693 u8 dtimper = found->u.mgd.dtim_period;
1694
1695 timeout = local->dynamic_ps_forced_timeout;
1696 if (timeout < 0)
1697 timeout = 100;
1698 local->hw.conf.dynamic_ps_timeout = timeout;
1699
1700 /* If the TIM IE is invalid, pretend the value is 1 */
1701 if (!dtimper)
1702 dtimper = 1;
1703
1704 local->hw.conf.ps_dtim_period = dtimper;
1705 local->ps_sdata = found;
1706 } else {
1707 local->ps_sdata = NULL;
1708 }
1709
1710 ieee80211_change_ps(local);
1711 }
1712
1713 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1714 {
1715 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1716
1717 if (sdata->vif.bss_conf.ps != ps_allowed) {
1718 sdata->vif.bss_conf.ps = ps_allowed;
1719 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1720 }
1721 }
1722
1723 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1724 {
1725 struct ieee80211_local *local =
1726 container_of(work, struct ieee80211_local,
1727 dynamic_ps_disable_work);
1728
1729 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1730 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1731 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1732 }
1733
1734 ieee80211_wake_queues_by_reason(&local->hw,
1735 IEEE80211_MAX_QUEUE_MAP,
1736 IEEE80211_QUEUE_STOP_REASON_PS,
1737 false);
1738 }
1739
1740 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1741 {
1742 struct ieee80211_local *local =
1743 container_of(work, struct ieee80211_local,
1744 dynamic_ps_enable_work);
1745 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1746 struct ieee80211_if_managed *ifmgd;
1747 unsigned long flags;
1748 int q;
1749
1750 /* can only happen when PS was just disabled anyway */
1751 if (!sdata)
1752 return;
1753
1754 ifmgd = &sdata->u.mgd;
1755
1756 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1757 return;
1758
1759 if (local->hw.conf.dynamic_ps_timeout > 0) {
1760 /* don't enter PS if TX frames are pending */
1761 if (drv_tx_frames_pending(local)) {
1762 mod_timer(&local->dynamic_ps_timer, jiffies +
1763 msecs_to_jiffies(
1764 local->hw.conf.dynamic_ps_timeout));
1765 return;
1766 }
1767
1768 /*
1769 * transmission can be stopped by others which leads to
1770 * dynamic_ps_timer expiry. Postpone the ps timer if it
1771 * is not the actual idle state.
1772 */
1773 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1774 for (q = 0; q < local->hw.queues; q++) {
1775 if (local->queue_stop_reasons[q]) {
1776 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1777 flags);
1778 mod_timer(&local->dynamic_ps_timer, jiffies +
1779 msecs_to_jiffies(
1780 local->hw.conf.dynamic_ps_timeout));
1781 return;
1782 }
1783 }
1784 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1785 }
1786
1787 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1788 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1789 if (drv_tx_frames_pending(local)) {
1790 mod_timer(&local->dynamic_ps_timer, jiffies +
1791 msecs_to_jiffies(
1792 local->hw.conf.dynamic_ps_timeout));
1793 } else {
1794 ieee80211_send_nullfunc(local, sdata, true);
1795 /* Flush to get the tx status of nullfunc frame */
1796 ieee80211_flush_queues(local, sdata, false);
1797 }
1798 }
1799
1800 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1801 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1802 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1803 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1804 local->hw.conf.flags |= IEEE80211_CONF_PS;
1805 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1806 }
1807 }
1808
1809 void ieee80211_dynamic_ps_timer(struct timer_list *t)
1810 {
1811 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1812
1813 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1814 }
1815
1816 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1817 {
1818 struct delayed_work *delayed_work = to_delayed_work(work);
1819 struct ieee80211_sub_if_data *sdata =
1820 container_of(delayed_work, struct ieee80211_sub_if_data,
1821 dfs_cac_timer_work);
1822 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1823
1824 mutex_lock(&sdata->local->mtx);
1825 if (sdata->wdev.cac_started) {
1826 ieee80211_vif_release_channel(sdata);
1827 cfg80211_cac_event(sdata->dev, &chandef,
1828 NL80211_RADAR_CAC_FINISHED,
1829 GFP_KERNEL);
1830 }
1831 mutex_unlock(&sdata->local->mtx);
1832 }
1833
1834 static bool
1835 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1836 {
1837 struct ieee80211_local *local = sdata->local;
1838 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1839 bool ret = false;
1840 int ac;
1841
1842 if (local->hw.queues < IEEE80211_NUM_ACS)
1843 return false;
1844
1845 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1846 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1847 int non_acm_ac;
1848 unsigned long now = jiffies;
1849
1850 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1851 tx_tspec->admitted_time &&
1852 time_after(now, tx_tspec->time_slice_start + HZ)) {
1853 tx_tspec->consumed_tx_time = 0;
1854 tx_tspec->time_slice_start = now;
1855
1856 if (tx_tspec->downgraded)
1857 tx_tspec->action =
1858 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1859 }
1860
1861 switch (tx_tspec->action) {
1862 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1863 /* take the original parameters */
1864 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1865 sdata_err(sdata,
1866 "failed to set TX queue parameters for queue %d\n",
1867 ac);
1868 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1869 tx_tspec->downgraded = false;
1870 ret = true;
1871 break;
1872 case TX_TSPEC_ACTION_DOWNGRADE:
1873 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1874 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1875 ret = true;
1876 break;
1877 }
1878 /* downgrade next lower non-ACM AC */
1879 for (non_acm_ac = ac + 1;
1880 non_acm_ac < IEEE80211_NUM_ACS;
1881 non_acm_ac++)
1882 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1883 break;
1884 /* Usually the loop will result in using BK even if it
1885 * requires admission control, but such a configuration
1886 * makes no sense and we have to transmit somehow - the
1887 * AC selection does the same thing.
1888 * If we started out trying to downgrade from BK, then
1889 * the extra condition here might be needed.
1890 */
1891 if (non_acm_ac >= IEEE80211_NUM_ACS)
1892 non_acm_ac = IEEE80211_AC_BK;
1893 if (drv_conf_tx(local, sdata, ac,
1894 &sdata->tx_conf[non_acm_ac]))
1895 sdata_err(sdata,
1896 "failed to set TX queue parameters for queue %d\n",
1897 ac);
1898 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1899 ret = true;
1900 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1901 tx_tspec->time_slice_start + HZ - now + 1);
1902 break;
1903 case TX_TSPEC_ACTION_NONE:
1904 /* nothing now */
1905 break;
1906 }
1907 }
1908
1909 return ret;
1910 }
1911
1912 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1913 {
1914 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1915 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1916 }
1917
1918 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1919 {
1920 struct ieee80211_sub_if_data *sdata;
1921
1922 sdata = container_of(work, struct ieee80211_sub_if_data,
1923 u.mgd.tx_tspec_wk.work);
1924 ieee80211_sta_handle_tspec_ac_params(sdata);
1925 }
1926
1927 /* MLME */
1928 static bool
1929 ieee80211_sta_wmm_params(struct ieee80211_local *local,
1930 struct ieee80211_sub_if_data *sdata,
1931 const u8 *wmm_param, size_t wmm_param_len,
1932 const struct ieee80211_mu_edca_param_set *mu_edca)
1933 {
1934 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1935 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1936 size_t left;
1937 int count, mu_edca_count, ac;
1938 const u8 *pos;
1939 u8 uapsd_queues = 0;
1940
1941 if (!local->ops->conf_tx)
1942 return false;
1943
1944 if (local->hw.queues < IEEE80211_NUM_ACS)
1945 return false;
1946
1947 if (!wmm_param)
1948 return false;
1949
1950 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1951 return false;
1952
1953 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1954 uapsd_queues = ifmgd->uapsd_queues;
1955
1956 count = wmm_param[6] & 0x0f;
1957 /* -1 is the initial value of ifmgd->mu_edca_last_param_set.
1958 * if mu_edca was preset before and now it disappeared tell
1959 * the driver about it.
1960 */
1961 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1;
1962 if (count == ifmgd->wmm_last_param_set &&
1963 mu_edca_count == ifmgd->mu_edca_last_param_set)
1964 return false;
1965 ifmgd->wmm_last_param_set = count;
1966 ifmgd->mu_edca_last_param_set = mu_edca_count;
1967
1968 pos = wmm_param + 8;
1969 left = wmm_param_len - 8;
1970
1971 memset(&params, 0, sizeof(params));
1972
1973 sdata->wmm_acm = 0;
1974 for (; left >= 4; left -= 4, pos += 4) {
1975 int aci = (pos[0] >> 5) & 0x03;
1976 int acm = (pos[0] >> 4) & 0x01;
1977 bool uapsd = false;
1978
1979 switch (aci) {
1980 case 1: /* AC_BK */
1981 ac = IEEE80211_AC_BK;
1982 if (acm)
1983 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1984 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1985 uapsd = true;
1986 params[ac].mu_edca = !!mu_edca;
1987 if (mu_edca)
1988 params[ac].mu_edca_param_rec = mu_edca->ac_bk;
1989 break;
1990 case 2: /* AC_VI */
1991 ac = IEEE80211_AC_VI;
1992 if (acm)
1993 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1994 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1995 uapsd = true;
1996 params[ac].mu_edca = !!mu_edca;
1997 if (mu_edca)
1998 params[ac].mu_edca_param_rec = mu_edca->ac_vi;
1999 break;
2000 case 3: /* AC_VO */
2001 ac = IEEE80211_AC_VO;
2002 if (acm)
2003 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
2004 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
2005 uapsd = true;
2006 params[ac].mu_edca = !!mu_edca;
2007 if (mu_edca)
2008 params[ac].mu_edca_param_rec = mu_edca->ac_vo;
2009 break;
2010 case 0: /* AC_BE */
2011 default:
2012 ac = IEEE80211_AC_BE;
2013 if (acm)
2014 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
2015 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
2016 uapsd = true;
2017 params[ac].mu_edca = !!mu_edca;
2018 if (mu_edca)
2019 params[ac].mu_edca_param_rec = mu_edca->ac_be;
2020 break;
2021 }
2022
2023 params[ac].aifs = pos[0] & 0x0f;
2024
2025 if (params[ac].aifs < 2) {
2026 sdata_info(sdata,
2027 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
2028 params[ac].aifs, aci);
2029 params[ac].aifs = 2;
2030 }
2031 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
2032 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
2033 params[ac].txop = get_unaligned_le16(pos + 2);
2034 params[ac].acm = acm;
2035 params[ac].uapsd = uapsd;
2036
2037 if (params[ac].cw_min == 0 ||
2038 params[ac].cw_min > params[ac].cw_max) {
2039 sdata_info(sdata,
2040 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
2041 params[ac].cw_min, params[ac].cw_max, aci);
2042 return false;
2043 }
2044 ieee80211_regulatory_limit_wmm_params(sdata, &params[ac], ac);
2045 }
2046
2047 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2048 mlme_dbg(sdata,
2049 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
2050 ac, params[ac].acm,
2051 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
2052 params[ac].txop, params[ac].uapsd,
2053 ifmgd->tx_tspec[ac].downgraded);
2054 sdata->tx_conf[ac] = params[ac];
2055 if (!ifmgd->tx_tspec[ac].downgraded &&
2056 drv_conf_tx(local, sdata, ac, &params[ac]))
2057 sdata_err(sdata,
2058 "failed to set TX queue parameters for AC %d\n",
2059 ac);
2060 }
2061
2062 /* enable WMM or activate new settings */
2063 sdata->vif.bss_conf.qos = true;
2064 return true;
2065 }
2066
2067 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2068 {
2069 lockdep_assert_held(&sdata->local->mtx);
2070
2071 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2072 ieee80211_run_deferred_scan(sdata->local);
2073 }
2074
2075 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2076 {
2077 mutex_lock(&sdata->local->mtx);
2078 __ieee80211_stop_poll(sdata);
2079 mutex_unlock(&sdata->local->mtx);
2080 }
2081
2082 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
2083 u16 capab, bool erp_valid, u8 erp)
2084 {
2085 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2086 struct ieee80211_supported_band *sband;
2087 u32 changed = 0;
2088 bool use_protection;
2089 bool use_short_preamble;
2090 bool use_short_slot;
2091
2092 sband = ieee80211_get_sband(sdata);
2093 if (!sband)
2094 return changed;
2095
2096 if (erp_valid) {
2097 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
2098 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
2099 } else {
2100 use_protection = false;
2101 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
2102 }
2103
2104 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
2105 if (sband->band == NL80211_BAND_5GHZ)
2106 use_short_slot = true;
2107
2108 if (use_protection != bss_conf->use_cts_prot) {
2109 bss_conf->use_cts_prot = use_protection;
2110 changed |= BSS_CHANGED_ERP_CTS_PROT;
2111 }
2112
2113 if (use_short_preamble != bss_conf->use_short_preamble) {
2114 bss_conf->use_short_preamble = use_short_preamble;
2115 changed |= BSS_CHANGED_ERP_PREAMBLE;
2116 }
2117
2118 if (use_short_slot != bss_conf->use_short_slot) {
2119 bss_conf->use_short_slot = use_short_slot;
2120 changed |= BSS_CHANGED_ERP_SLOT;
2121 }
2122
2123 return changed;
2124 }
2125
2126 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2127 struct cfg80211_bss *cbss,
2128 u32 bss_info_changed)
2129 {
2130 struct ieee80211_bss *bss = (void *)cbss->priv;
2131 struct ieee80211_local *local = sdata->local;
2132 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2133
2134 bss_info_changed |= BSS_CHANGED_ASSOC;
2135 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
2136 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
2137
2138 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
2139 beacon_loss_count * bss_conf->beacon_int));
2140
2141 sdata->u.mgd.associated = cbss;
2142 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2143
2144 ieee80211_check_rate_mask(sdata);
2145
2146 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
2147
2148 if (sdata->vif.p2p ||
2149 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2150 const struct cfg80211_bss_ies *ies;
2151
2152 rcu_read_lock();
2153 ies = rcu_dereference(cbss->ies);
2154 if (ies) {
2155 int ret;
2156
2157 ret = cfg80211_get_p2p_attr(
2158 ies->data, ies->len,
2159 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2160 (u8 *) &bss_conf->p2p_noa_attr,
2161 sizeof(bss_conf->p2p_noa_attr));
2162 if (ret >= 2) {
2163 sdata->u.mgd.p2p_noa_index =
2164 bss_conf->p2p_noa_attr.index;
2165 bss_info_changed |= BSS_CHANGED_P2P_PS;
2166 }
2167 }
2168 rcu_read_unlock();
2169 }
2170
2171 /* just to be sure */
2172 ieee80211_stop_poll(sdata);
2173
2174 ieee80211_led_assoc(local, 1);
2175
2176 if (sdata->u.mgd.have_beacon) {
2177 /*
2178 * If the AP is buggy we may get here with no DTIM period
2179 * known, so assume it's 1 which is the only safe assumption
2180 * in that case, although if the TIM IE is broken powersave
2181 * probably just won't work at all.
2182 */
2183 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
2184 bss_conf->beacon_rate = bss->beacon_rate;
2185 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2186 } else {
2187 bss_conf->beacon_rate = NULL;
2188 bss_conf->dtim_period = 0;
2189 }
2190
2191 bss_conf->assoc = 1;
2192
2193 /* Tell the driver to monitor connection quality (if supported) */
2194 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2195 bss_conf->cqm_rssi_thold)
2196 bss_info_changed |= BSS_CHANGED_CQM;
2197
2198 /* Enable ARP filtering */
2199 if (bss_conf->arp_addr_cnt)
2200 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
2201
2202 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2203
2204 mutex_lock(&local->iflist_mtx);
2205 ieee80211_recalc_ps(local);
2206 mutex_unlock(&local->iflist_mtx);
2207
2208 ieee80211_recalc_smps(sdata);
2209 ieee80211_recalc_ps_vif(sdata);
2210
2211 netif_carrier_on(sdata->dev);
2212 }
2213
2214 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2215 u16 stype, u16 reason, bool tx,
2216 u8 *frame_buf)
2217 {
2218 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2219 struct ieee80211_local *local = sdata->local;
2220 u32 changed = 0;
2221
2222 sdata_assert_lock(sdata);
2223
2224 if (WARN_ON_ONCE(tx && !frame_buf))
2225 return;
2226
2227 if (WARN_ON(!ifmgd->associated))
2228 return;
2229
2230 ieee80211_stop_poll(sdata);
2231
2232 ifmgd->associated = NULL;
2233 netif_carrier_off(sdata->dev);
2234
2235 /*
2236 * if we want to get out of ps before disassoc (why?) we have
2237 * to do it before sending disassoc, as otherwise the null-packet
2238 * won't be valid.
2239 */
2240 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2241 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2242 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2243 }
2244 local->ps_sdata = NULL;
2245
2246 /* disable per-vif ps */
2247 ieee80211_recalc_ps_vif(sdata);
2248
2249 /* make sure ongoing transmission finishes */
2250 synchronize_net();
2251
2252 /*
2253 * drop any frame before deauth/disassoc, this can be data or
2254 * management frame. Since we are disconnecting, we should not
2255 * insist sending these frames which can take time and delay
2256 * the disconnection and possible the roaming.
2257 */
2258 if (tx)
2259 ieee80211_flush_queues(local, sdata, true);
2260
2261 /* deauthenticate/disassociate now */
2262 if (tx || frame_buf) {
2263 /*
2264 * In multi channel scenarios guarantee that the virtual
2265 * interface is granted immediate airtime to transmit the
2266 * deauthentication frame by calling mgd_prepare_tx, if the
2267 * driver requested so.
2268 */
2269 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
2270 !ifmgd->have_beacon)
2271 drv_mgd_prepare_tx(sdata->local, sdata, 0);
2272
2273 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2274 reason, tx, frame_buf);
2275 }
2276
2277 /* flush out frame - make sure the deauth was actually sent */
2278 if (tx)
2279 ieee80211_flush_queues(local, sdata, false);
2280
2281 /* clear bssid only after building the needed mgmt frames */
2282 eth_zero_addr(ifmgd->bssid);
2283
2284 /* remove AP and TDLS peers */
2285 sta_info_flush(sdata);
2286
2287 /* finally reset all BSS / config parameters */
2288 changed |= ieee80211_reset_erp_info(sdata);
2289
2290 ieee80211_led_assoc(local, 0);
2291 changed |= BSS_CHANGED_ASSOC;
2292 sdata->vif.bss_conf.assoc = false;
2293
2294 ifmgd->p2p_noa_index = -1;
2295 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2296 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2297
2298 /* on the next assoc, re-program HT/VHT parameters */
2299 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2300 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2301 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2302 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2303
2304 /* reset MU-MIMO ownership and group data */
2305 memset(sdata->vif.bss_conf.mu_group.membership, 0,
2306 sizeof(sdata->vif.bss_conf.mu_group.membership));
2307 memset(sdata->vif.bss_conf.mu_group.position, 0,
2308 sizeof(sdata->vif.bss_conf.mu_group.position));
2309 changed |= BSS_CHANGED_MU_GROUPS;
2310 sdata->vif.mu_mimo_owner = false;
2311
2312 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2313
2314 del_timer_sync(&local->dynamic_ps_timer);
2315 cancel_work_sync(&local->dynamic_ps_enable_work);
2316
2317 /* Disable ARP filtering */
2318 if (sdata->vif.bss_conf.arp_addr_cnt)
2319 changed |= BSS_CHANGED_ARP_FILTER;
2320
2321 sdata->vif.bss_conf.qos = false;
2322 changed |= BSS_CHANGED_QOS;
2323
2324 /* The BSSID (not really interesting) and HT changed */
2325 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2326 ieee80211_bss_info_change_notify(sdata, changed);
2327
2328 /* disassociated - set to defaults now */
2329 ieee80211_set_wmm_default(sdata, false, false);
2330
2331 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2332 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2333 del_timer_sync(&sdata->u.mgd.timer);
2334 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2335
2336 sdata->vif.bss_conf.dtim_period = 0;
2337 sdata->vif.bss_conf.beacon_rate = NULL;
2338
2339 ifmgd->have_beacon = false;
2340
2341 ifmgd->flags = 0;
2342 mutex_lock(&local->mtx);
2343 ieee80211_vif_release_channel(sdata);
2344
2345 sdata->vif.csa_active = false;
2346 ifmgd->csa_waiting_bcn = false;
2347 ifmgd->csa_ignored_same_chan = false;
2348 if (sdata->csa_block_tx) {
2349 ieee80211_wake_vif_queues(local, sdata,
2350 IEEE80211_QUEUE_STOP_REASON_CSA);
2351 sdata->csa_block_tx = false;
2352 }
2353 mutex_unlock(&local->mtx);
2354
2355 /* existing TX TSPEC sessions no longer exist */
2356 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2357 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2358
2359 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2360 }
2361
2362 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2363 struct ieee80211_hdr *hdr)
2364 {
2365 /*
2366 * We can postpone the mgd.timer whenever receiving unicast frames
2367 * from AP because we know that the connection is working both ways
2368 * at that time. But multicast frames (and hence also beacons) must
2369 * be ignored here, because we need to trigger the timer during
2370 * data idle periods for sending the periodic probe request to the
2371 * AP we're connected to.
2372 */
2373 if (is_multicast_ether_addr(hdr->addr1))
2374 return;
2375
2376 ieee80211_sta_reset_conn_monitor(sdata);
2377 }
2378
2379 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2380 {
2381 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2382 struct ieee80211_local *local = sdata->local;
2383
2384 mutex_lock(&local->mtx);
2385 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2386 goto out;
2387
2388 __ieee80211_stop_poll(sdata);
2389
2390 mutex_lock(&local->iflist_mtx);
2391 ieee80211_recalc_ps(local);
2392 mutex_unlock(&local->iflist_mtx);
2393
2394 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2395 goto out;
2396
2397 /*
2398 * We've received a probe response, but are not sure whether
2399 * we have or will be receiving any beacons or data, so let's
2400 * schedule the timers again, just in case.
2401 */
2402 ieee80211_sta_reset_beacon_monitor(sdata);
2403
2404 mod_timer(&ifmgd->conn_mon_timer,
2405 round_jiffies_up(jiffies +
2406 IEEE80211_CONNECTION_IDLE_TIME));
2407 out:
2408 mutex_unlock(&local->mtx);
2409 }
2410
2411 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2412 struct ieee80211_hdr *hdr,
2413 u16 tx_time)
2414 {
2415 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2416 u16 tid = ieee80211_get_tid(hdr);
2417 int ac = ieee80211_ac_from_tid(tid);
2418 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2419 unsigned long now = jiffies;
2420
2421 if (likely(!tx_tspec->admitted_time))
2422 return;
2423
2424 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2425 tx_tspec->consumed_tx_time = 0;
2426 tx_tspec->time_slice_start = now;
2427
2428 if (tx_tspec->downgraded) {
2429 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2430 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2431 }
2432 }
2433
2434 if (tx_tspec->downgraded)
2435 return;
2436
2437 tx_tspec->consumed_tx_time += tx_time;
2438
2439 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2440 tx_tspec->downgraded = true;
2441 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2442 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2443 }
2444 }
2445
2446 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2447 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2448 {
2449 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2450
2451 if (!ieee80211_is_data(hdr->frame_control))
2452 return;
2453
2454 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2455 sdata->u.mgd.probe_send_count > 0) {
2456 if (ack)
2457 ieee80211_sta_reset_conn_monitor(sdata);
2458 else
2459 sdata->u.mgd.nullfunc_failed = true;
2460 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2461 return;
2462 }
2463
2464 if (ack)
2465 ieee80211_sta_reset_conn_monitor(sdata);
2466 }
2467
2468 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
2469 const u8 *src, const u8 *dst,
2470 const u8 *ssid, size_t ssid_len,
2471 struct ieee80211_channel *channel)
2472 {
2473 struct sk_buff *skb;
2474
2475 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
2476 ssid, ssid_len, NULL, 0,
2477 IEEE80211_PROBE_FLAG_DIRECTED);
2478 if (skb)
2479 ieee80211_tx_skb(sdata, skb);
2480 }
2481
2482 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2483 {
2484 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2485 const u8 *ssid;
2486 u8 *dst = ifmgd->associated->bssid;
2487 u8 unicast_limit = max(1, max_probe_tries - 3);
2488 struct sta_info *sta;
2489
2490 /*
2491 * Try sending broadcast probe requests for the last three
2492 * probe requests after the first ones failed since some
2493 * buggy APs only support broadcast probe requests.
2494 */
2495 if (ifmgd->probe_send_count >= unicast_limit)
2496 dst = NULL;
2497
2498 /*
2499 * When the hardware reports an accurate Tx ACK status, it's
2500 * better to send a nullfunc frame instead of a probe request,
2501 * as it will kick us off the AP quickly if we aren't associated
2502 * anymore. The timeout will be reset if the frame is ACKed by
2503 * the AP.
2504 */
2505 ifmgd->probe_send_count++;
2506
2507 if (dst) {
2508 mutex_lock(&sdata->local->sta_mtx);
2509 sta = sta_info_get(sdata, dst);
2510 if (!WARN_ON(!sta))
2511 ieee80211_check_fast_rx(sta);
2512 mutex_unlock(&sdata->local->sta_mtx);
2513 }
2514
2515 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2516 ifmgd->nullfunc_failed = false;
2517 ieee80211_send_nullfunc(sdata->local, sdata, false);
2518 } else {
2519 int ssid_len;
2520
2521 rcu_read_lock();
2522 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2523 if (WARN_ON_ONCE(ssid == NULL))
2524 ssid_len = 0;
2525 else
2526 ssid_len = ssid[1];
2527
2528 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
2529 ssid + 2, ssid_len,
2530 ifmgd->associated->channel);
2531 rcu_read_unlock();
2532 }
2533
2534 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2535 run_again(sdata, ifmgd->probe_timeout);
2536 }
2537
2538 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2539 bool beacon)
2540 {
2541 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2542 bool already = false;
2543
2544 if (!ieee80211_sdata_running(sdata))
2545 return;
2546
2547 sdata_lock(sdata);
2548
2549 if (!ifmgd->associated)
2550 goto out;
2551
2552 mutex_lock(&sdata->local->mtx);
2553
2554 if (sdata->local->tmp_channel || sdata->local->scanning) {
2555 mutex_unlock(&sdata->local->mtx);
2556 goto out;
2557 }
2558
2559 if (beacon) {
2560 mlme_dbg_ratelimited(sdata,
2561 "detected beacon loss from AP (missed %d beacons) - probing\n",
2562 beacon_loss_count);
2563
2564 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2565 }
2566
2567 /*
2568 * The driver/our work has already reported this event or the
2569 * connection monitoring has kicked in and we have already sent
2570 * a probe request. Or maybe the AP died and the driver keeps
2571 * reporting until we disassociate...
2572 *
2573 * In either case we have to ignore the current call to this
2574 * function (except for setting the correct probe reason bit)
2575 * because otherwise we would reset the timer every time and
2576 * never check whether we received a probe response!
2577 */
2578 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2579 already = true;
2580
2581 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2582
2583 mutex_unlock(&sdata->local->mtx);
2584
2585 if (already)
2586 goto out;
2587
2588 mutex_lock(&sdata->local->iflist_mtx);
2589 ieee80211_recalc_ps(sdata->local);
2590 mutex_unlock(&sdata->local->iflist_mtx);
2591
2592 ifmgd->probe_send_count = 0;
2593 ieee80211_mgd_probe_ap_send(sdata);
2594 out:
2595 sdata_unlock(sdata);
2596 }
2597
2598 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2599 struct ieee80211_vif *vif)
2600 {
2601 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2602 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2603 struct cfg80211_bss *cbss;
2604 struct sk_buff *skb;
2605 const u8 *ssid;
2606 int ssid_len;
2607
2608 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2609 return NULL;
2610
2611 sdata_assert_lock(sdata);
2612
2613 if (ifmgd->associated)
2614 cbss = ifmgd->associated;
2615 else if (ifmgd->auth_data)
2616 cbss = ifmgd->auth_data->bss;
2617 else if (ifmgd->assoc_data)
2618 cbss = ifmgd->assoc_data->bss;
2619 else
2620 return NULL;
2621
2622 rcu_read_lock();
2623 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2624 if (WARN_ON_ONCE(ssid == NULL))
2625 ssid_len = 0;
2626 else
2627 ssid_len = ssid[1];
2628
2629 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2630 (u32) -1, cbss->channel,
2631 ssid + 2, ssid_len,
2632 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
2633 rcu_read_unlock();
2634
2635 return skb;
2636 }
2637 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2638
2639 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2640 const u8 *buf, size_t len, bool tx,
2641 u16 reason)
2642 {
2643 struct ieee80211_event event = {
2644 .type = MLME_EVENT,
2645 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2646 .u.mlme.reason = reason,
2647 };
2648
2649 if (tx)
2650 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2651 else
2652 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2653
2654 drv_event_callback(sdata->local, sdata, &event);
2655 }
2656
2657 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2658 {
2659 struct ieee80211_local *local = sdata->local;
2660 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2661 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2662 bool tx;
2663
2664 sdata_lock(sdata);
2665 if (!ifmgd->associated) {
2666 sdata_unlock(sdata);
2667 return;
2668 }
2669
2670 tx = !sdata->csa_block_tx;
2671
2672 /* AP is probably out of range (or not reachable for another reason) so
2673 * remove the bss struct for that AP.
2674 */
2675 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2676
2677 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2678 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2679 tx, frame_buf);
2680 mutex_lock(&local->mtx);
2681 sdata->vif.csa_active = false;
2682 ifmgd->csa_waiting_bcn = false;
2683 if (sdata->csa_block_tx) {
2684 ieee80211_wake_vif_queues(local, sdata,
2685 IEEE80211_QUEUE_STOP_REASON_CSA);
2686 sdata->csa_block_tx = false;
2687 }
2688 mutex_unlock(&local->mtx);
2689
2690 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
2691 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2692
2693 sdata_unlock(sdata);
2694 }
2695
2696 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2697 {
2698 struct ieee80211_sub_if_data *sdata =
2699 container_of(work, struct ieee80211_sub_if_data,
2700 u.mgd.beacon_connection_loss_work);
2701 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2702
2703 if (ifmgd->associated)
2704 ifmgd->beacon_loss_count++;
2705
2706 if (ifmgd->connection_loss) {
2707 sdata_info(sdata, "Connection to AP %pM lost\n",
2708 ifmgd->bssid);
2709 __ieee80211_disconnect(sdata);
2710 } else {
2711 ieee80211_mgd_probe_ap(sdata, true);
2712 }
2713 }
2714
2715 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2716 {
2717 struct ieee80211_sub_if_data *sdata =
2718 container_of(work, struct ieee80211_sub_if_data,
2719 u.mgd.csa_connection_drop_work);
2720
2721 __ieee80211_disconnect(sdata);
2722 }
2723
2724 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2725 {
2726 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2727 struct ieee80211_hw *hw = &sdata->local->hw;
2728
2729 trace_api_beacon_loss(sdata);
2730
2731 sdata->u.mgd.connection_loss = false;
2732 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2733 }
2734 EXPORT_SYMBOL(ieee80211_beacon_loss);
2735
2736 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2737 {
2738 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2739 struct ieee80211_hw *hw = &sdata->local->hw;
2740
2741 trace_api_connection_loss(sdata);
2742
2743 sdata->u.mgd.connection_loss = true;
2744 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2745 }
2746 EXPORT_SYMBOL(ieee80211_connection_loss);
2747
2748
2749 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2750 bool assoc)
2751 {
2752 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2753
2754 sdata_assert_lock(sdata);
2755
2756 if (!assoc) {
2757 /*
2758 * we are not authenticated yet, the only timer that could be
2759 * running is the timeout for the authentication response which
2760 * which is not relevant anymore.
2761 */
2762 del_timer_sync(&sdata->u.mgd.timer);
2763 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2764
2765 eth_zero_addr(sdata->u.mgd.bssid);
2766 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2767 sdata->u.mgd.flags = 0;
2768 mutex_lock(&sdata->local->mtx);
2769 ieee80211_vif_release_channel(sdata);
2770 mutex_unlock(&sdata->local->mtx);
2771 }
2772
2773 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2774 kfree(auth_data);
2775 sdata->u.mgd.auth_data = NULL;
2776 }
2777
2778 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2779 bool assoc, bool abandon)
2780 {
2781 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2782
2783 sdata_assert_lock(sdata);
2784
2785 if (!assoc) {
2786 /*
2787 * we are not associated yet, the only timer that could be
2788 * running is the timeout for the association response which
2789 * which is not relevant anymore.
2790 */
2791 del_timer_sync(&sdata->u.mgd.timer);
2792 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2793
2794 eth_zero_addr(sdata->u.mgd.bssid);
2795 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2796 sdata->u.mgd.flags = 0;
2797 sdata->vif.mu_mimo_owner = false;
2798
2799 mutex_lock(&sdata->local->mtx);
2800 ieee80211_vif_release_channel(sdata);
2801 mutex_unlock(&sdata->local->mtx);
2802
2803 if (abandon)
2804 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2805 }
2806
2807 kfree(assoc_data);
2808 sdata->u.mgd.assoc_data = NULL;
2809 }
2810
2811 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2812 struct ieee80211_mgmt *mgmt, size_t len)
2813 {
2814 struct ieee80211_local *local = sdata->local;
2815 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2816 u8 *pos;
2817 struct ieee802_11_elems elems;
2818 u32 tx_flags = 0;
2819
2820 pos = mgmt->u.auth.variable;
2821 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
2822 mgmt->bssid, auth_data->bss->bssid);
2823 if (!elems.challenge)
2824 return;
2825 auth_data->expected_transaction = 4;
2826 drv_mgd_prepare_tx(sdata->local, sdata, 0);
2827 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2828 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2829 IEEE80211_TX_INTFL_MLME_CONN_TX;
2830 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2831 elems.challenge - 2, elems.challenge_len + 2,
2832 auth_data->bss->bssid, auth_data->bss->bssid,
2833 auth_data->key, auth_data->key_len,
2834 auth_data->key_idx, tx_flags);
2835 }
2836
2837 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata,
2838 const u8 *bssid)
2839 {
2840 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2841 struct sta_info *sta;
2842 bool result = true;
2843
2844 sdata_info(sdata, "authenticated\n");
2845 ifmgd->auth_data->done = true;
2846 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2847 ifmgd->auth_data->timeout_started = true;
2848 run_again(sdata, ifmgd->auth_data->timeout);
2849
2850 /* move station state to auth */
2851 mutex_lock(&sdata->local->sta_mtx);
2852 sta = sta_info_get(sdata, bssid);
2853 if (!sta) {
2854 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2855 result = false;
2856 goto out;
2857 }
2858 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2859 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2860 result = false;
2861 goto out;
2862 }
2863
2864 out:
2865 mutex_unlock(&sdata->local->sta_mtx);
2866 return result;
2867 }
2868
2869 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2870 struct ieee80211_mgmt *mgmt, size_t len)
2871 {
2872 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2873 u8 bssid[ETH_ALEN];
2874 u16 auth_alg, auth_transaction, status_code;
2875 struct ieee80211_event event = {
2876 .type = MLME_EVENT,
2877 .u.mlme.data = AUTH_EVENT,
2878 };
2879
2880 sdata_assert_lock(sdata);
2881
2882 if (len < 24 + 6)
2883 return;
2884
2885 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2886 return;
2887
2888 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2889
2890 if (!ether_addr_equal(bssid, mgmt->bssid))
2891 return;
2892
2893 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2894 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2895 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2896
2897 if (auth_alg != ifmgd->auth_data->algorithm ||
2898 (auth_alg != WLAN_AUTH_SAE &&
2899 auth_transaction != ifmgd->auth_data->expected_transaction) ||
2900 (auth_alg == WLAN_AUTH_SAE &&
2901 (auth_transaction < ifmgd->auth_data->expected_transaction ||
2902 auth_transaction > 2))) {
2903 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2904 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2905 auth_transaction,
2906 ifmgd->auth_data->expected_transaction);
2907 return;
2908 }
2909
2910 if (status_code != WLAN_STATUS_SUCCESS) {
2911 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2912 mgmt->sa, status_code);
2913 ieee80211_destroy_auth_data(sdata, false);
2914 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2915 event.u.mlme.status = MLME_DENIED;
2916 event.u.mlme.reason = status_code;
2917 drv_event_callback(sdata->local, sdata, &event);
2918 return;
2919 }
2920
2921 switch (ifmgd->auth_data->algorithm) {
2922 case WLAN_AUTH_OPEN:
2923 case WLAN_AUTH_LEAP:
2924 case WLAN_AUTH_FT:
2925 case WLAN_AUTH_SAE:
2926 case WLAN_AUTH_FILS_SK:
2927 case WLAN_AUTH_FILS_SK_PFS:
2928 case WLAN_AUTH_FILS_PK:
2929 break;
2930 case WLAN_AUTH_SHARED_KEY:
2931 if (ifmgd->auth_data->expected_transaction != 4) {
2932 ieee80211_auth_challenge(sdata, mgmt, len);
2933 /* need another frame */
2934 return;
2935 }
2936 break;
2937 default:
2938 WARN_ONCE(1, "invalid auth alg %d",
2939 ifmgd->auth_data->algorithm);
2940 return;
2941 }
2942
2943 event.u.mlme.status = MLME_SUCCESS;
2944 drv_event_callback(sdata->local, sdata, &event);
2945 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
2946 (auth_transaction == 2 &&
2947 ifmgd->auth_data->expected_transaction == 2)) {
2948 if (!ieee80211_mark_sta_auth(sdata, bssid))
2949 goto out_err;
2950 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2951 auth_transaction == 2) {
2952 sdata_info(sdata, "SAE peer confirmed\n");
2953 ifmgd->auth_data->peer_confirmed = true;
2954 }
2955
2956 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2957 return;
2958 out_err:
2959 mutex_unlock(&sdata->local->sta_mtx);
2960 /* ignore frame -- wait for timeout */
2961 }
2962
2963 #define case_WLAN(type) \
2964 case WLAN_REASON_##type: return #type
2965
2966 const char *ieee80211_get_reason_code_string(u16 reason_code)
2967 {
2968 switch (reason_code) {
2969 case_WLAN(UNSPECIFIED);
2970 case_WLAN(PREV_AUTH_NOT_VALID);
2971 case_WLAN(DEAUTH_LEAVING);
2972 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2973 case_WLAN(DISASSOC_AP_BUSY);
2974 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2975 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2976 case_WLAN(DISASSOC_STA_HAS_LEFT);
2977 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2978 case_WLAN(DISASSOC_BAD_POWER);
2979 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2980 case_WLAN(INVALID_IE);
2981 case_WLAN(MIC_FAILURE);
2982 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2983 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2984 case_WLAN(IE_DIFFERENT);
2985 case_WLAN(INVALID_GROUP_CIPHER);
2986 case_WLAN(INVALID_PAIRWISE_CIPHER);
2987 case_WLAN(INVALID_AKMP);
2988 case_WLAN(UNSUPP_RSN_VERSION);
2989 case_WLAN(INVALID_RSN_IE_CAP);
2990 case_WLAN(IEEE8021X_FAILED);
2991 case_WLAN(CIPHER_SUITE_REJECTED);
2992 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2993 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2994 case_WLAN(DISASSOC_LOW_ACK);
2995 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2996 case_WLAN(QSTA_LEAVE_QBSS);
2997 case_WLAN(QSTA_NOT_USE);
2998 case_WLAN(QSTA_REQUIRE_SETUP);
2999 case_WLAN(QSTA_TIMEOUT);
3000 case_WLAN(QSTA_CIPHER_NOT_SUPP);
3001 case_WLAN(MESH_PEER_CANCELED);
3002 case_WLAN(MESH_MAX_PEERS);
3003 case_WLAN(MESH_CONFIG);
3004 case_WLAN(MESH_CLOSE);
3005 case_WLAN(MESH_MAX_RETRIES);
3006 case_WLAN(MESH_CONFIRM_TIMEOUT);
3007 case_WLAN(MESH_INVALID_GTK);
3008 case_WLAN(MESH_INCONSISTENT_PARAM);
3009 case_WLAN(MESH_INVALID_SECURITY);
3010 case_WLAN(MESH_PATH_ERROR);
3011 case_WLAN(MESH_PATH_NOFORWARD);
3012 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
3013 case_WLAN(MAC_EXISTS_IN_MBSS);
3014 case_WLAN(MESH_CHAN_REGULATORY);
3015 case_WLAN(MESH_CHAN);
3016 default: return "<unknown>";
3017 }
3018 }
3019
3020 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
3021 struct ieee80211_mgmt *mgmt, size_t len)
3022 {
3023 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3024 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
3025
3026 sdata_assert_lock(sdata);
3027
3028 if (len < 24 + 2)
3029 return;
3030
3031 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3032 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3033 return;
3034 }
3035
3036 if (ifmgd->associated &&
3037 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
3038 const u8 *bssid = ifmgd->associated->bssid;
3039
3040 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
3041 bssid, reason_code,
3042 ieee80211_get_reason_code_string(reason_code));
3043
3044 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3045
3046 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
3047 reason_code);
3048 return;
3049 }
3050
3051 if (ifmgd->assoc_data &&
3052 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3053 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
3054
3055 sdata_info(sdata,
3056 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
3057 bssid, reason_code,
3058 ieee80211_get_reason_code_string(reason_code));
3059
3060 ieee80211_destroy_assoc_data(sdata, false, true);
3061
3062 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3063 return;
3064 }
3065 }
3066
3067
3068 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
3069 struct ieee80211_mgmt *mgmt, size_t len)
3070 {
3071 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3072 u16 reason_code;
3073
3074 sdata_assert_lock(sdata);
3075
3076 if (len < 24 + 2)
3077 return;
3078
3079 if (!ifmgd->associated ||
3080 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3081 return;
3082
3083 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
3084
3085 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3086 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3087 return;
3088 }
3089
3090 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
3091 mgmt->sa, reason_code,
3092 ieee80211_get_reason_code_string(reason_code));
3093
3094 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3095
3096 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
3097 }
3098
3099 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
3100 u8 *supp_rates, unsigned int supp_rates_len,
3101 u32 *rates, u32 *basic_rates,
3102 bool *have_higher_than_11mbit,
3103 int *min_rate, int *min_rate_index,
3104 int shift)
3105 {
3106 int i, j;
3107
3108 for (i = 0; i < supp_rates_len; i++) {
3109 int rate = supp_rates[i] & 0x7f;
3110 bool is_basic = !!(supp_rates[i] & 0x80);
3111
3112 if ((rate * 5 * (1 << shift)) > 110)
3113 *have_higher_than_11mbit = true;
3114
3115 /*
3116 * Skip HT and VHT BSS membership selectors since they're not
3117 * rates.
3118 *
3119 * Note: Even though the membership selector and the basic
3120 * rate flag share the same bit, they are not exactly
3121 * the same.
3122 */
3123 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3124 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
3125 continue;
3126
3127 for (j = 0; j < sband->n_bitrates; j++) {
3128 struct ieee80211_rate *br;
3129 int brate;
3130
3131 br = &sband->bitrates[j];
3132
3133 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3134 if (brate == rate) {
3135 *rates |= BIT(j);
3136 if (is_basic)
3137 *basic_rates |= BIT(j);
3138 if ((rate * 5) < *min_rate) {
3139 *min_rate = rate * 5;
3140 *min_rate_index = j;
3141 }
3142 break;
3143 }
3144 }
3145 }
3146 }
3147
3148 static bool ieee80211_twt_req_supported(const struct sta_info *sta,
3149 const struct ieee802_11_elems *elems)
3150 {
3151 if (elems->ext_capab_len < 10)
3152 return false;
3153
3154 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
3155 return false;
3156
3157 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] &
3158 IEEE80211_HE_MAC_CAP0_TWT_RES;
3159 }
3160
3161 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
3162 struct cfg80211_bss *cbss,
3163 struct ieee80211_mgmt *mgmt, size_t len)
3164 {
3165 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3166 struct ieee80211_local *local = sdata->local;
3167 struct ieee80211_supported_band *sband;
3168 struct sta_info *sta;
3169 u8 *pos;
3170 u16 capab_info, aid;
3171 struct ieee802_11_elems elems;
3172 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3173 const struct cfg80211_bss_ies *bss_ies = NULL;
3174 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3175 u32 changed = 0;
3176 int err;
3177 bool ret;
3178
3179 /* AssocResp and ReassocResp have identical structure */
3180
3181 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3182 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3183
3184 /*
3185 * The 5 MSB of the AID field are reserved
3186 * (802.11-2016 9.4.1.8 AID field)
3187 */
3188 aid &= 0x7ff;
3189
3190 ifmgd->broken_ap = false;
3191
3192 if (aid == 0 || aid > IEEE80211_MAX_AID) {
3193 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
3194 aid);
3195 aid = 0;
3196 ifmgd->broken_ap = true;
3197 }
3198
3199 pos = mgmt->u.assoc_resp.variable;
3200 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
3201 mgmt->bssid, assoc_data->bss->bssid);
3202
3203 if (!elems.supp_rates) {
3204 sdata_info(sdata, "no SuppRates element in AssocResp\n");
3205 return false;
3206 }
3207
3208 ifmgd->aid = aid;
3209 ifmgd->tdls_chan_switch_prohibited =
3210 elems.ext_capab && elems.ext_capab_len >= 5 &&
3211 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3212
3213 /*
3214 * Some APs are erroneously not including some information in their
3215 * (re)association response frames. Try to recover by using the data
3216 * from the beacon or probe response. This seems to afflict mobile
3217 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
3218 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
3219 */
3220 if ((assoc_data->wmm && !elems.wmm_param) ||
3221 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3222 (!elems.ht_cap_elem || !elems.ht_operation)) ||
3223 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3224 (!elems.vht_cap_elem || !elems.vht_operation))) {
3225 const struct cfg80211_bss_ies *ies;
3226 struct ieee802_11_elems bss_elems;
3227
3228 rcu_read_lock();
3229 ies = rcu_dereference(cbss->ies);
3230 if (ies)
3231 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3232 GFP_ATOMIC);
3233 rcu_read_unlock();
3234 if (!bss_ies)
3235 return false;
3236
3237 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
3238 false, &bss_elems,
3239 mgmt->bssid,
3240 assoc_data->bss->bssid);
3241 if (assoc_data->wmm &&
3242 !elems.wmm_param && bss_elems.wmm_param) {
3243 elems.wmm_param = bss_elems.wmm_param;
3244 sdata_info(sdata,
3245 "AP bug: WMM param missing from AssocResp\n");
3246 }
3247
3248 /*
3249 * Also check if we requested HT/VHT, otherwise the AP doesn't
3250 * have to include the IEs in the (re)association response.
3251 */
3252 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
3253 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3254 elems.ht_cap_elem = bss_elems.ht_cap_elem;
3255 sdata_info(sdata,
3256 "AP bug: HT capability missing from AssocResp\n");
3257 }
3258 if (!elems.ht_operation && bss_elems.ht_operation &&
3259 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3260 elems.ht_operation = bss_elems.ht_operation;
3261 sdata_info(sdata,
3262 "AP bug: HT operation missing from AssocResp\n");
3263 }
3264 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
3265 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3266 elems.vht_cap_elem = bss_elems.vht_cap_elem;
3267 sdata_info(sdata,
3268 "AP bug: VHT capa missing from AssocResp\n");
3269 }
3270 if (!elems.vht_operation && bss_elems.vht_operation &&
3271 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3272 elems.vht_operation = bss_elems.vht_operation;
3273 sdata_info(sdata,
3274 "AP bug: VHT operation missing from AssocResp\n");
3275 }
3276 }
3277
3278 /*
3279 * We previously checked these in the beacon/probe response, so
3280 * they should be present here. This is just a safety net.
3281 */
3282 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3283 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
3284 sdata_info(sdata,
3285 "HT AP is missing WMM params or HT capability/operation\n");
3286 ret = false;
3287 goto out;
3288 }
3289
3290 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3291 (!elems.vht_cap_elem || !elems.vht_operation)) {
3292 sdata_info(sdata,
3293 "VHT AP is missing VHT capability/operation\n");
3294 ret = false;
3295 goto out;
3296 }
3297
3298 mutex_lock(&sdata->local->sta_mtx);
3299 /*
3300 * station info was already allocated and inserted before
3301 * the association and should be available to us
3302 */
3303 sta = sta_info_get(sdata, cbss->bssid);
3304 if (WARN_ON(!sta)) {
3305 mutex_unlock(&sdata->local->sta_mtx);
3306 ret = false;
3307 goto out;
3308 }
3309
3310 sband = ieee80211_get_sband(sdata);
3311 if (!sband) {
3312 mutex_unlock(&sdata->local->sta_mtx);
3313 ret = false;
3314 goto out;
3315 }
3316
3317 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3318 (!elems.he_cap || !elems.he_operation)) {
3319 mutex_unlock(&sdata->local->sta_mtx);
3320 sdata_info(sdata,
3321 "HE AP is missing HE capability/operation\n");
3322 ret = false;
3323 goto out;
3324 }
3325
3326 /* Set up internal HT/VHT capabilities */
3327 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3328 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3329 elems.ht_cap_elem, sta);
3330
3331 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3332 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3333 elems.vht_cap_elem, sta);
3334
3335 if (elems.he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3336 elems.he_cap) {
3337 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
3338 elems.he_cap,
3339 elems.he_cap_len,
3340 sta);
3341
3342 bss_conf->he_support = sta->sta.he_cap.has_he;
3343 bss_conf->twt_requester =
3344 ieee80211_twt_req_supported(sta, &elems);
3345 } else {
3346 bss_conf->he_support = false;
3347 bss_conf->twt_requester = false;
3348 }
3349
3350 if (bss_conf->he_support) {
3351 bss_conf->bss_color =
3352 le32_get_bits(elems.he_operation->he_oper_params,
3353 IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
3354
3355 bss_conf->htc_trig_based_pkt_ext =
3356 le32_get_bits(elems.he_operation->he_oper_params,
3357 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
3358 bss_conf->frame_time_rts_th =
3359 le32_get_bits(elems.he_operation->he_oper_params,
3360 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3361
3362 bss_conf->multi_sta_back_32bit =
3363 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3364 IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP;
3365
3366 bss_conf->ack_enabled =
3367 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3368 IEEE80211_HE_MAC_CAP2_ACK_EN;
3369
3370 bss_conf->uora_exists = !!elems.uora_element;
3371 if (elems.uora_element)
3372 bss_conf->uora_ocw_range = elems.uora_element[0];
3373
3374 /* TODO: OPEN: what happens if BSS color disable is set? */
3375 }
3376
3377 if (cbss->transmitted_bss) {
3378 bss_conf->nontransmitted = true;
3379 ether_addr_copy(bss_conf->transmitter_bssid,
3380 cbss->transmitted_bss->bssid);
3381 bss_conf->bssid_indicator = cbss->max_bssid_indicator;
3382 bss_conf->bssid_index = cbss->bssid_index;
3383 }
3384
3385 /*
3386 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3387 * in their association response, so ignore that data for our own
3388 * configuration. If it changed since the last beacon, we'll get the
3389 * next beacon and update then.
3390 */
3391
3392 /*
3393 * If an operating mode notification IE is present, override the
3394 * NSS calculation (that would be done in rate_control_rate_init())
3395 * and use the # of streams from that element.
3396 */
3397 if (elems.opmode_notif &&
3398 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3399 u8 nss;
3400
3401 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3402 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3403 nss += 1;
3404 sta->sta.rx_nss = nss;
3405 }
3406
3407 rate_control_rate_init(sta);
3408
3409 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3410 set_sta_flag(sta, WLAN_STA_MFP);
3411 sta->sta.mfp = true;
3412 } else {
3413 sta->sta.mfp = false;
3414 }
3415
3416 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3417
3418 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3419 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3420 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3421 if (err) {
3422 sdata_info(sdata,
3423 "failed to move station %pM to desired state\n",
3424 sta->sta.addr);
3425 WARN_ON(__sta_info_destroy(sta));
3426 mutex_unlock(&sdata->local->sta_mtx);
3427 ret = false;
3428 goto out;
3429 }
3430
3431 mutex_unlock(&sdata->local->sta_mtx);
3432
3433 /*
3434 * Always handle WMM once after association regardless
3435 * of the first value the AP uses. Setting -1 here has
3436 * that effect because the AP values is an unsigned
3437 * 4-bit value.
3438 */
3439 ifmgd->wmm_last_param_set = -1;
3440 ifmgd->mu_edca_last_param_set = -1;
3441
3442 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3443 ieee80211_set_wmm_default(sdata, false, false);
3444 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3445 elems.wmm_param_len,
3446 elems.mu_edca_param_set)) {
3447 /* still enable QoS since we might have HT/VHT */
3448 ieee80211_set_wmm_default(sdata, false, true);
3449 /* set the disable-WMM flag in this case to disable
3450 * tracking WMM parameter changes in the beacon if
3451 * the parameters weren't actually valid. Doing so
3452 * avoids changing parameters very strangely when
3453 * the AP is going back and forth between valid and
3454 * invalid parameters.
3455 */
3456 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3457 }
3458 changed |= BSS_CHANGED_QOS;
3459
3460 if (elems.max_idle_period_ie) {
3461 bss_conf->max_idle_period =
3462 le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
3463 bss_conf->protected_keep_alive =
3464 !!(elems.max_idle_period_ie->idle_options &
3465 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3466 changed |= BSS_CHANGED_KEEP_ALIVE;
3467 } else {
3468 bss_conf->max_idle_period = 0;
3469 bss_conf->protected_keep_alive = false;
3470 }
3471
3472 /* set AID and assoc capability,
3473 * ieee80211_set_associated() will tell the driver */
3474 bss_conf->aid = aid;
3475 bss_conf->assoc_capability = capab_info;
3476 ieee80211_set_associated(sdata, cbss, changed);
3477
3478 /*
3479 * If we're using 4-addr mode, let the AP know that we're
3480 * doing so, so that it can create the STA VLAN on its side
3481 */
3482 if (ifmgd->use_4addr)
3483 ieee80211_send_4addr_nullfunc(local, sdata);
3484
3485 /*
3486 * Start timer to probe the connection to the AP now.
3487 * Also start the timer that will detect beacon loss.
3488 */
3489 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3490 ieee80211_sta_reset_beacon_monitor(sdata);
3491
3492 ret = true;
3493 out:
3494 kfree(bss_ies);
3495 return ret;
3496 }
3497
3498 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3499 struct ieee80211_mgmt *mgmt,
3500 size_t len)
3501 {
3502 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3503 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3504 u16 capab_info, status_code, aid;
3505 struct ieee802_11_elems elems;
3506 int ac, uapsd_queues = -1;
3507 u8 *pos;
3508 bool reassoc;
3509 struct cfg80211_bss *bss;
3510 struct ieee80211_event event = {
3511 .type = MLME_EVENT,
3512 .u.mlme.data = ASSOC_EVENT,
3513 };
3514
3515 sdata_assert_lock(sdata);
3516
3517 if (!assoc_data)
3518 return;
3519 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3520 return;
3521
3522 /*
3523 * AssocResp and ReassocResp have identical structure, so process both
3524 * of them in this function.
3525 */
3526
3527 if (len < 24 + 6)
3528 return;
3529
3530 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
3531 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3532 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3533 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3534
3535 sdata_info(sdata,
3536 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3537 reassoc ? "Rea" : "A", mgmt->sa,
3538 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3539
3540 if (assoc_data->fils_kek_len &&
3541 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3542 return;
3543
3544 pos = mgmt->u.assoc_resp.variable;
3545 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
3546 mgmt->bssid, assoc_data->bss->bssid);
3547
3548 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3549 elems.timeout_int &&
3550 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3551 u32 tu, ms;
3552 tu = le32_to_cpu(elems.timeout_int->value);
3553 ms = tu * 1024 / 1000;
3554 sdata_info(sdata,
3555 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3556 mgmt->sa, tu, ms);
3557 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3558 assoc_data->timeout_started = true;
3559 if (ms > IEEE80211_ASSOC_TIMEOUT)
3560 run_again(sdata, assoc_data->timeout);
3561 return;
3562 }
3563
3564 bss = assoc_data->bss;
3565
3566 if (status_code != WLAN_STATUS_SUCCESS) {
3567 sdata_info(sdata, "%pM denied association (code=%d)\n",
3568 mgmt->sa, status_code);
3569 ieee80211_destroy_assoc_data(sdata, false, false);
3570 event.u.mlme.status = MLME_DENIED;
3571 event.u.mlme.reason = status_code;
3572 drv_event_callback(sdata->local, sdata, &event);
3573 } else {
3574 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3575 /* oops -- internal error -- send timeout for now */
3576 ieee80211_destroy_assoc_data(sdata, false, false);
3577 cfg80211_assoc_timeout(sdata->dev, bss);
3578 return;
3579 }
3580 event.u.mlme.status = MLME_SUCCESS;
3581 drv_event_callback(sdata->local, sdata, &event);
3582 sdata_info(sdata, "associated\n");
3583
3584 /*
3585 * destroy assoc_data afterwards, as otherwise an idle
3586 * recalc after assoc_data is NULL but before associated
3587 * is set can cause the interface to go idle
3588 */
3589 ieee80211_destroy_assoc_data(sdata, true, false);
3590
3591 /* get uapsd queues configuration */
3592 uapsd_queues = 0;
3593 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3594 if (sdata->tx_conf[ac].uapsd)
3595 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3596 }
3597
3598 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues,
3599 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len);
3600 }
3601
3602 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3603 struct ieee80211_mgmt *mgmt, size_t len,
3604 struct ieee80211_rx_status *rx_status)
3605 {
3606 struct ieee80211_local *local = sdata->local;
3607 struct ieee80211_bss *bss;
3608 struct ieee80211_channel *channel;
3609
3610 sdata_assert_lock(sdata);
3611
3612 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3613 if (!channel)
3614 return;
3615
3616 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
3617 if (bss) {
3618 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3619 ieee80211_rx_bss_put(local, bss);
3620 }
3621 }
3622
3623
3624 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3625 struct sk_buff *skb)
3626 {
3627 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3628 struct ieee80211_if_managed *ifmgd;
3629 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3630 size_t baselen, len = skb->len;
3631
3632 ifmgd = &sdata->u.mgd;
3633
3634 sdata_assert_lock(sdata);
3635
3636 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3637 return; /* ignore ProbeResp to foreign address */
3638
3639 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3640 if (baselen > len)
3641 return;
3642
3643 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3644
3645 if (ifmgd->associated &&
3646 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3647 ieee80211_reset_ap_probe(sdata);
3648 }
3649
3650 /*
3651 * This is the canonical list of information elements we care about,
3652 * the filter code also gives us all changes to the Microsoft OUI
3653 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3654 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3655 * changes to requested client power.
3656 *
3657 * We implement beacon filtering in software since that means we can
3658 * avoid processing the frame here and in cfg80211, and userspace
3659 * will not be able to tell whether the hardware supports it or not.
3660 *
3661 * XXX: This list needs to be dynamic -- userspace needs to be able to
3662 * add items it requires. It also needs to be able to tell us to
3663 * look out for other vendor IEs.
3664 */
3665 static const u64 care_about_ies =
3666 (1ULL << WLAN_EID_COUNTRY) |
3667 (1ULL << WLAN_EID_ERP_INFO) |
3668 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3669 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3670 (1ULL << WLAN_EID_HT_CAPABILITY) |
3671 (1ULL << WLAN_EID_HT_OPERATION) |
3672 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3673
3674 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata,
3675 struct ieee80211_if_managed *ifmgd,
3676 struct ieee80211_bss_conf *bss_conf,
3677 struct ieee80211_local *local,
3678 struct ieee80211_rx_status *rx_status)
3679 {
3680 /* Track average RSSI from the Beacon frames of the current AP */
3681
3682 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3683 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3684 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3685 ifmgd->last_cqm_event_signal = 0;
3686 ifmgd->count_beacon_signal = 1;
3687 ifmgd->last_ave_beacon_signal = 0;
3688 } else {
3689 ifmgd->count_beacon_signal++;
3690 }
3691
3692 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3693
3694 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3695 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3696 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3697 int last_sig = ifmgd->last_ave_beacon_signal;
3698 struct ieee80211_event event = {
3699 .type = RSSI_EVENT,
3700 };
3701
3702 /*
3703 * if signal crosses either of the boundaries, invoke callback
3704 * with appropriate parameters
3705 */
3706 if (sig > ifmgd->rssi_max_thold &&
3707 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3708 ifmgd->last_ave_beacon_signal = sig;
3709 event.u.rssi.data = RSSI_EVENT_HIGH;
3710 drv_event_callback(local, sdata, &event);
3711 } else if (sig < ifmgd->rssi_min_thold &&
3712 (last_sig >= ifmgd->rssi_max_thold ||
3713 last_sig == 0)) {
3714 ifmgd->last_ave_beacon_signal = sig;
3715 event.u.rssi.data = RSSI_EVENT_LOW;
3716 drv_event_callback(local, sdata, &event);
3717 }
3718 }
3719
3720 if (bss_conf->cqm_rssi_thold &&
3721 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3722 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3723 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3724 int last_event = ifmgd->last_cqm_event_signal;
3725 int thold = bss_conf->cqm_rssi_thold;
3726 int hyst = bss_conf->cqm_rssi_hyst;
3727
3728 if (sig < thold &&
3729 (last_event == 0 || sig < last_event - hyst)) {
3730 ifmgd->last_cqm_event_signal = sig;
3731 ieee80211_cqm_rssi_notify(
3732 &sdata->vif,
3733 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3734 sig, GFP_KERNEL);
3735 } else if (sig > thold &&
3736 (last_event == 0 || sig > last_event + hyst)) {
3737 ifmgd->last_cqm_event_signal = sig;
3738 ieee80211_cqm_rssi_notify(
3739 &sdata->vif,
3740 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3741 sig, GFP_KERNEL);
3742 }
3743 }
3744
3745 if (bss_conf->cqm_rssi_low &&
3746 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3747 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3748 int last_event = ifmgd->last_cqm_event_signal;
3749 int low = bss_conf->cqm_rssi_low;
3750 int high = bss_conf->cqm_rssi_high;
3751
3752 if (sig < low &&
3753 (last_event == 0 || last_event >= low)) {
3754 ifmgd->last_cqm_event_signal = sig;
3755 ieee80211_cqm_rssi_notify(
3756 &sdata->vif,
3757 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3758 sig, GFP_KERNEL);
3759 } else if (sig > high &&
3760 (last_event == 0 || last_event <= high)) {
3761 ifmgd->last_cqm_event_signal = sig;
3762 ieee80211_cqm_rssi_notify(
3763 &sdata->vif,
3764 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3765 sig, GFP_KERNEL);
3766 }
3767 }
3768 }
3769
3770 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
3771 struct cfg80211_bss *bss)
3772 {
3773 if (ether_addr_equal(tx_bssid, bss->bssid))
3774 return true;
3775 if (!bss->transmitted_bss)
3776 return false;
3777 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid);
3778 }
3779
3780 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3781 struct ieee80211_mgmt *mgmt, size_t len,
3782 struct ieee80211_rx_status *rx_status)
3783 {
3784 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3785 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3786 size_t baselen;
3787 struct ieee802_11_elems elems;
3788 struct ieee80211_local *local = sdata->local;
3789 struct ieee80211_chanctx_conf *chanctx_conf;
3790 struct ieee80211_channel *chan;
3791 struct sta_info *sta;
3792 u32 changed = 0;
3793 bool erp_valid;
3794 u8 erp_value = 0;
3795 u32 ncrc;
3796 u8 *bssid;
3797 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3798
3799 sdata_assert_lock(sdata);
3800
3801 /* Process beacon from the current BSS */
3802 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3803 if (baselen > len)
3804 return;
3805
3806 rcu_read_lock();
3807 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3808 if (!chanctx_conf) {
3809 rcu_read_unlock();
3810 return;
3811 }
3812
3813 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3814 rcu_read_unlock();
3815 return;
3816 }
3817 chan = chanctx_conf->def.chan;
3818 rcu_read_unlock();
3819
3820 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3821 ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->assoc_data->bss)) {
3822 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3823 len - baselen, false, &elems,
3824 mgmt->bssid,
3825 ifmgd->assoc_data->bss->bssid);
3826
3827 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3828
3829 if (elems.dtim_period)
3830 ifmgd->dtim_period = elems.dtim_period;
3831 ifmgd->have_beacon = true;
3832 ifmgd->assoc_data->need_beacon = false;
3833 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3834 sdata->vif.bss_conf.sync_tsf =
3835 le64_to_cpu(mgmt->u.beacon.timestamp);
3836 sdata->vif.bss_conf.sync_device_ts =
3837 rx_status->device_timestamp;
3838 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
3839 }
3840
3841 if (elems.mbssid_config_ie)
3842 bss_conf->profile_periodicity =
3843 elems.mbssid_config_ie->profile_periodicity;
3844
3845 if (elems.ext_capab_len >= 11 &&
3846 (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
3847 bss_conf->ema_ap = true;
3848
3849 /* continue assoc process */
3850 ifmgd->assoc_data->timeout = jiffies;
3851 ifmgd->assoc_data->timeout_started = true;
3852 run_again(sdata, ifmgd->assoc_data->timeout);
3853 return;
3854 }
3855
3856 if (!ifmgd->associated ||
3857 !ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->associated))
3858 return;
3859 bssid = ifmgd->associated->bssid;
3860
3861 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
3862 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf,
3863 local, rx_status);
3864
3865 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3866 mlme_dbg_ratelimited(sdata,
3867 "cancelling AP probe due to a received beacon\n");
3868 ieee80211_reset_ap_probe(sdata);
3869 }
3870
3871 /*
3872 * Push the beacon loss detection into the future since
3873 * we are processing a beacon from the AP just now.
3874 */
3875 ieee80211_sta_reset_beacon_monitor(sdata);
3876
3877 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3878 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3879 len - baselen, false, &elems,
3880 care_about_ies, ncrc,
3881 mgmt->bssid, bssid);
3882
3883 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3884 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3885 if (local->hw.conf.dynamic_ps_timeout > 0) {
3886 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3887 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3888 ieee80211_hw_config(local,
3889 IEEE80211_CONF_CHANGE_PS);
3890 }
3891 ieee80211_send_nullfunc(local, sdata, false);
3892 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3893 local->pspolling = true;
3894
3895 /*
3896 * Here is assumed that the driver will be
3897 * able to send ps-poll frame and receive a
3898 * response even though power save mode is
3899 * enabled, but some drivers might require
3900 * to disable power save here. This needs
3901 * to be investigated.
3902 */
3903 ieee80211_send_pspoll(local, sdata);
3904 }
3905 }
3906
3907 if (sdata->vif.p2p ||
3908 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3909 struct ieee80211_p2p_noa_attr noa = {};
3910 int ret;
3911
3912 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3913 len - baselen,
3914 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3915 (u8 *) &noa, sizeof(noa));
3916 if (ret >= 2) {
3917 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3918 /* valid noa_attr and index changed */
3919 sdata->u.mgd.p2p_noa_index = noa.index;
3920 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3921 changed |= BSS_CHANGED_P2P_PS;
3922 /*
3923 * make sure we update all information, the CRC
3924 * mechanism doesn't look at P2P attributes.
3925 */
3926 ifmgd->beacon_crc_valid = false;
3927 }
3928 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3929 /* noa_attr not found and we had valid noa_attr before */
3930 sdata->u.mgd.p2p_noa_index = -1;
3931 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3932 changed |= BSS_CHANGED_P2P_PS;
3933 ifmgd->beacon_crc_valid = false;
3934 }
3935 }
3936
3937 if (ifmgd->csa_waiting_bcn)
3938 ieee80211_chswitch_post_beacon(sdata);
3939
3940 /*
3941 * Update beacon timing and dtim count on every beacon appearance. This
3942 * will allow the driver to use the most updated values. Do it before
3943 * comparing this one with last received beacon.
3944 * IMPORTANT: These parameters would possibly be out of sync by the time
3945 * the driver will use them. The synchronized view is currently
3946 * guaranteed only in certain callbacks.
3947 */
3948 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3949 sdata->vif.bss_conf.sync_tsf =
3950 le64_to_cpu(mgmt->u.beacon.timestamp);
3951 sdata->vif.bss_conf.sync_device_ts =
3952 rx_status->device_timestamp;
3953 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
3954 }
3955
3956 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3957 return;
3958 ifmgd->beacon_crc = ncrc;
3959 ifmgd->beacon_crc_valid = true;
3960
3961 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3962
3963 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3964 rx_status->device_timestamp,
3965 &elems, true);
3966
3967 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3968 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3969 elems.wmm_param_len,
3970 elems.mu_edca_param_set))
3971 changed |= BSS_CHANGED_QOS;
3972
3973 /*
3974 * If we haven't had a beacon before, tell the driver about the
3975 * DTIM period (and beacon timing if desired) now.
3976 */
3977 if (!ifmgd->have_beacon) {
3978 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3979 bss_conf->dtim_period = elems.dtim_period ?: 1;
3980
3981 changed |= BSS_CHANGED_BEACON_INFO;
3982 ifmgd->have_beacon = true;
3983
3984 mutex_lock(&local->iflist_mtx);
3985 ieee80211_recalc_ps(local);
3986 mutex_unlock(&local->iflist_mtx);
3987
3988 ieee80211_recalc_ps_vif(sdata);
3989 }
3990
3991 if (elems.erp_info) {
3992 erp_valid = true;
3993 erp_value = elems.erp_info[0];
3994 } else {
3995 erp_valid = false;
3996 }
3997 changed |= ieee80211_handle_bss_capability(sdata,
3998 le16_to_cpu(mgmt->u.beacon.capab_info),
3999 erp_valid, erp_value);
4000
4001 mutex_lock(&local->sta_mtx);
4002 sta = sta_info_get(sdata, bssid);
4003
4004 if (ieee80211_config_bw(sdata, sta,
4005 elems.ht_cap_elem, elems.ht_operation,
4006 elems.vht_operation, elems.he_operation,
4007 bssid, &changed)) {
4008 mutex_unlock(&local->sta_mtx);
4009 sdata_info(sdata,
4010 "failed to follow AP %pM bandwidth change, disconnect\n",
4011 bssid);
4012 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4013 WLAN_REASON_DEAUTH_LEAVING,
4014 true, deauth_buf);
4015 ieee80211_report_disconnect(sdata, deauth_buf,
4016 sizeof(deauth_buf), true,
4017 WLAN_REASON_DEAUTH_LEAVING);
4018 return;
4019 }
4020
4021 if (sta && elems.opmode_notif)
4022 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
4023 rx_status->band);
4024 mutex_unlock(&local->sta_mtx);
4025
4026 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
4027 elems.country_elem,
4028 elems.country_elem_len,
4029 elems.pwr_constr_elem,
4030 elems.cisco_dtpc_elem);
4031
4032 ieee80211_bss_info_change_notify(sdata, changed);
4033 }
4034
4035 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
4036 struct sk_buff *skb)
4037 {
4038 struct ieee80211_rx_status *rx_status;
4039 struct ieee80211_mgmt *mgmt;
4040 u16 fc;
4041 struct ieee802_11_elems elems;
4042 int ies_len;
4043
4044 rx_status = (struct ieee80211_rx_status *) skb->cb;
4045 mgmt = (struct ieee80211_mgmt *) skb->data;
4046 fc = le16_to_cpu(mgmt->frame_control);
4047
4048 sdata_lock(sdata);
4049
4050 switch (fc & IEEE80211_FCTL_STYPE) {
4051 case IEEE80211_STYPE_BEACON:
4052 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
4053 break;
4054 case IEEE80211_STYPE_PROBE_RESP:
4055 ieee80211_rx_mgmt_probe_resp(sdata, skb);
4056 break;
4057 case IEEE80211_STYPE_AUTH:
4058 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
4059 break;
4060 case IEEE80211_STYPE_DEAUTH:
4061 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
4062 break;
4063 case IEEE80211_STYPE_DISASSOC:
4064 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
4065 break;
4066 case IEEE80211_STYPE_ASSOC_RESP:
4067 case IEEE80211_STYPE_REASSOC_RESP:
4068 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
4069 break;
4070 case IEEE80211_STYPE_ACTION:
4071 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
4072 ies_len = skb->len -
4073 offsetof(struct ieee80211_mgmt,
4074 u.action.u.chan_switch.variable);
4075
4076 if (ies_len < 0)
4077 break;
4078
4079 /* CSA IE cannot be overridden, no need for BSSID */
4080 ieee802_11_parse_elems(
4081 mgmt->u.action.u.chan_switch.variable,
4082 ies_len, true, &elems, mgmt->bssid, NULL);
4083
4084 if (elems.parse_error)
4085 break;
4086
4087 ieee80211_sta_process_chanswitch(sdata,
4088 rx_status->mactime,
4089 rx_status->device_timestamp,
4090 &elems, false);
4091 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
4092 ies_len = skb->len -
4093 offsetof(struct ieee80211_mgmt,
4094 u.action.u.ext_chan_switch.variable);
4095
4096 if (ies_len < 0)
4097 break;
4098
4099 /*
4100 * extended CSA IE can't be overridden, no need for
4101 * BSSID
4102 */
4103 ieee802_11_parse_elems(
4104 mgmt->u.action.u.ext_chan_switch.variable,
4105 ies_len, true, &elems, mgmt->bssid, NULL);
4106
4107 if (elems.parse_error)
4108 break;
4109
4110 /* for the handling code pretend this was also an IE */
4111 elems.ext_chansw_ie =
4112 &mgmt->u.action.u.ext_chan_switch.data;
4113
4114 ieee80211_sta_process_chanswitch(sdata,
4115 rx_status->mactime,
4116 rx_status->device_timestamp,
4117 &elems, false);
4118 }
4119 break;
4120 }
4121 sdata_unlock(sdata);
4122 }
4123
4124 static void ieee80211_sta_timer(struct timer_list *t)
4125 {
4126 struct ieee80211_sub_if_data *sdata =
4127 from_timer(sdata, t, u.mgd.timer);
4128
4129 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4130 }
4131
4132 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
4133 u8 *bssid, u8 reason, bool tx)
4134 {
4135 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4136
4137 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
4138 tx, frame_buf);
4139
4140 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4141 reason);
4142 }
4143
4144 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
4145 {
4146 struct ieee80211_local *local = sdata->local;
4147 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4148 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
4149 u32 tx_flags = 0;
4150 u16 trans = 1;
4151 u16 status = 0;
4152 u16 prepare_tx_duration = 0;
4153
4154 sdata_assert_lock(sdata);
4155
4156 if (WARN_ON_ONCE(!auth_data))
4157 return -EINVAL;
4158
4159 auth_data->tries++;
4160
4161 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
4162 sdata_info(sdata, "authentication with %pM timed out\n",
4163 auth_data->bss->bssid);
4164
4165 /*
4166 * Most likely AP is not in the range so remove the
4167 * bss struct for that AP.
4168 */
4169 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
4170
4171 return -ETIMEDOUT;
4172 }
4173
4174 if (auth_data->algorithm == WLAN_AUTH_SAE)
4175 prepare_tx_duration =
4176 jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
4177
4178 drv_mgd_prepare_tx(local, sdata, prepare_tx_duration);
4179
4180 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
4181 auth_data->bss->bssid, auth_data->tries,
4182 IEEE80211_AUTH_MAX_TRIES);
4183
4184 auth_data->expected_transaction = 2;
4185
4186 if (auth_data->algorithm == WLAN_AUTH_SAE) {
4187 trans = auth_data->sae_trans;
4188 status = auth_data->sae_status;
4189 auth_data->expected_transaction = trans;
4190 }
4191
4192 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4193 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
4194 IEEE80211_TX_INTFL_MLME_CONN_TX;
4195
4196 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
4197 auth_data->data, auth_data->data_len,
4198 auth_data->bss->bssid,
4199 auth_data->bss->bssid, NULL, 0, 0,
4200 tx_flags);
4201
4202 if (tx_flags == 0) {
4203 if (auth_data->algorithm == WLAN_AUTH_SAE)
4204 auth_data->timeout = jiffies +
4205 IEEE80211_AUTH_TIMEOUT_SAE;
4206 else
4207 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
4208 } else {
4209 auth_data->timeout =
4210 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
4211 }
4212
4213 auth_data->timeout_started = true;
4214 run_again(sdata, auth_data->timeout);
4215
4216 return 0;
4217 }
4218
4219 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
4220 {
4221 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
4222 struct ieee80211_local *local = sdata->local;
4223
4224 sdata_assert_lock(sdata);
4225
4226 assoc_data->tries++;
4227 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
4228 sdata_info(sdata, "association with %pM timed out\n",
4229 assoc_data->bss->bssid);
4230
4231 /*
4232 * Most likely AP is not in the range so remove the
4233 * bss struct for that AP.
4234 */
4235 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
4236
4237 return -ETIMEDOUT;
4238 }
4239
4240 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
4241 assoc_data->bss->bssid, assoc_data->tries,
4242 IEEE80211_ASSOC_MAX_TRIES);
4243 ieee80211_send_assoc(sdata);
4244
4245 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4246 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
4247 assoc_data->timeout_started = true;
4248 run_again(sdata, assoc_data->timeout);
4249 } else {
4250 assoc_data->timeout =
4251 round_jiffies_up(jiffies +
4252 IEEE80211_ASSOC_TIMEOUT_LONG);
4253 assoc_data->timeout_started = true;
4254 run_again(sdata, assoc_data->timeout);
4255 }
4256
4257 return 0;
4258 }
4259
4260 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
4261 __le16 fc, bool acked)
4262 {
4263 struct ieee80211_local *local = sdata->local;
4264
4265 sdata->u.mgd.status_fc = fc;
4266 sdata->u.mgd.status_acked = acked;
4267 sdata->u.mgd.status_received = true;
4268
4269 ieee80211_queue_work(&local->hw, &sdata->work);
4270 }
4271
4272 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
4273 {
4274 struct ieee80211_local *local = sdata->local;
4275 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4276
4277 sdata_lock(sdata);
4278
4279 if (ifmgd->status_received) {
4280 __le16 fc = ifmgd->status_fc;
4281 bool status_acked = ifmgd->status_acked;
4282
4283 ifmgd->status_received = false;
4284 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
4285 if (status_acked) {
4286 if (ifmgd->auth_data->algorithm ==
4287 WLAN_AUTH_SAE)
4288 ifmgd->auth_data->timeout =
4289 jiffies +
4290 IEEE80211_AUTH_TIMEOUT_SAE;
4291 else
4292 ifmgd->auth_data->timeout =
4293 jiffies +
4294 IEEE80211_AUTH_TIMEOUT_SHORT;
4295 run_again(sdata, ifmgd->auth_data->timeout);
4296 } else {
4297 ifmgd->auth_data->timeout = jiffies - 1;
4298 }
4299 ifmgd->auth_data->timeout_started = true;
4300 } else if (ifmgd->assoc_data &&
4301 (ieee80211_is_assoc_req(fc) ||
4302 ieee80211_is_reassoc_req(fc))) {
4303 if (status_acked) {
4304 ifmgd->assoc_data->timeout =
4305 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
4306 run_again(sdata, ifmgd->assoc_data->timeout);
4307 } else {
4308 ifmgd->assoc_data->timeout = jiffies - 1;
4309 }
4310 ifmgd->assoc_data->timeout_started = true;
4311 }
4312 }
4313
4314 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
4315 time_after(jiffies, ifmgd->auth_data->timeout)) {
4316 if (ifmgd->auth_data->done) {
4317 /*
4318 * ok ... we waited for assoc but userspace didn't,
4319 * so let's just kill the auth data
4320 */
4321 ieee80211_destroy_auth_data(sdata, false);
4322 } else if (ieee80211_auth(sdata)) {
4323 u8 bssid[ETH_ALEN];
4324 struct ieee80211_event event = {
4325 .type = MLME_EVENT,
4326 .u.mlme.data = AUTH_EVENT,
4327 .u.mlme.status = MLME_TIMEOUT,
4328 };
4329
4330 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
4331
4332 ieee80211_destroy_auth_data(sdata, false);
4333
4334 cfg80211_auth_timeout(sdata->dev, bssid);
4335 drv_event_callback(sdata->local, sdata, &event);
4336 }
4337 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
4338 run_again(sdata, ifmgd->auth_data->timeout);
4339
4340 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
4341 time_after(jiffies, ifmgd->assoc_data->timeout)) {
4342 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
4343 ieee80211_do_assoc(sdata)) {
4344 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4345 struct ieee80211_event event = {
4346 .type = MLME_EVENT,
4347 .u.mlme.data = ASSOC_EVENT,
4348 .u.mlme.status = MLME_TIMEOUT,
4349 };
4350
4351 ieee80211_destroy_assoc_data(sdata, false, false);
4352 cfg80211_assoc_timeout(sdata->dev, bss);
4353 drv_event_callback(sdata->local, sdata, &event);
4354 }
4355 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
4356 run_again(sdata, ifmgd->assoc_data->timeout);
4357
4358 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
4359 ifmgd->associated) {
4360 u8 bssid[ETH_ALEN];
4361 int max_tries;
4362
4363 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4364
4365 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4366 max_tries = max_nullfunc_tries;
4367 else
4368 max_tries = max_probe_tries;
4369
4370 /* ACK received for nullfunc probing frame */
4371 if (!ifmgd->probe_send_count)
4372 ieee80211_reset_ap_probe(sdata);
4373 else if (ifmgd->nullfunc_failed) {
4374 if (ifmgd->probe_send_count < max_tries) {
4375 mlme_dbg(sdata,
4376 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
4377 bssid, ifmgd->probe_send_count,
4378 max_tries);
4379 ieee80211_mgd_probe_ap_send(sdata);
4380 } else {
4381 mlme_dbg(sdata,
4382 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
4383 bssid);
4384 ieee80211_sta_connection_lost(sdata, bssid,
4385 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4386 false);
4387 }
4388 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
4389 run_again(sdata, ifmgd->probe_timeout);
4390 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4391 mlme_dbg(sdata,
4392 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
4393 bssid, probe_wait_ms);
4394 ieee80211_sta_connection_lost(sdata, bssid,
4395 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4396 } else if (ifmgd->probe_send_count < max_tries) {
4397 mlme_dbg(sdata,
4398 "No probe response from AP %pM after %dms, try %d/%i\n",
4399 bssid, probe_wait_ms,
4400 ifmgd->probe_send_count, max_tries);
4401 ieee80211_mgd_probe_ap_send(sdata);
4402 } else {
4403 /*
4404 * We actually lost the connection ... or did we?
4405 * Let's make sure!
4406 */
4407 mlme_dbg(sdata,
4408 "No probe response from AP %pM after %dms, disconnecting.\n",
4409 bssid, probe_wait_ms);
4410
4411 ieee80211_sta_connection_lost(sdata, bssid,
4412 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4413 }
4414 }
4415
4416 sdata_unlock(sdata);
4417 }
4418
4419 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
4420 {
4421 struct ieee80211_sub_if_data *sdata =
4422 from_timer(sdata, t, u.mgd.bcn_mon_timer);
4423 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4424
4425 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4426 return;
4427
4428 sdata->u.mgd.connection_loss = false;
4429 ieee80211_queue_work(&sdata->local->hw,
4430 &sdata->u.mgd.beacon_connection_loss_work);
4431 }
4432
4433 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
4434 {
4435 struct ieee80211_sub_if_data *sdata =
4436 from_timer(sdata, t, u.mgd.conn_mon_timer);
4437 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4438 struct ieee80211_local *local = sdata->local;
4439
4440 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4441 return;
4442
4443 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4444 }
4445
4446 static void ieee80211_sta_monitor_work(struct work_struct *work)
4447 {
4448 struct ieee80211_sub_if_data *sdata =
4449 container_of(work, struct ieee80211_sub_if_data,
4450 u.mgd.monitor_work);
4451
4452 ieee80211_mgd_probe_ap(sdata, false);
4453 }
4454
4455 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4456 {
4457 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4458 __ieee80211_stop_poll(sdata);
4459
4460 /* let's probe the connection once */
4461 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4462 ieee80211_queue_work(&sdata->local->hw,
4463 &sdata->u.mgd.monitor_work);
4464 }
4465 }
4466
4467 #ifdef CONFIG_PM
4468 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4469 {
4470 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4471 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4472
4473 sdata_lock(sdata);
4474
4475 if (ifmgd->auth_data || ifmgd->assoc_data) {
4476 const u8 *bssid = ifmgd->auth_data ?
4477 ifmgd->auth_data->bss->bssid :
4478 ifmgd->assoc_data->bss->bssid;
4479
4480 /*
4481 * If we are trying to authenticate / associate while suspending,
4482 * cfg80211 won't know and won't actually abort those attempts,
4483 * thus we need to do that ourselves.
4484 */
4485 ieee80211_send_deauth_disassoc(sdata, bssid,
4486 IEEE80211_STYPE_DEAUTH,
4487 WLAN_REASON_DEAUTH_LEAVING,
4488 false, frame_buf);
4489 if (ifmgd->assoc_data)
4490 ieee80211_destroy_assoc_data(sdata, false, true);
4491 if (ifmgd->auth_data)
4492 ieee80211_destroy_auth_data(sdata, false);
4493 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4494 IEEE80211_DEAUTH_FRAME_LEN);
4495 }
4496
4497 /* This is a bit of a hack - we should find a better and more generic
4498 * solution to this. Normally when suspending, cfg80211 will in fact
4499 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4500 * auth (not so important) or assoc (this is the problem) process.
4501 *
4502 * As a consequence, it can happen that we are in the process of both
4503 * associating and suspending, and receive an association response
4504 * after cfg80211 has checked if it needs to disconnect, but before
4505 * we actually set the flag to drop incoming frames. This will then
4506 * cause the workqueue flush to process the association response in
4507 * the suspend, resulting in a successful association just before it
4508 * tries to remove the interface from the driver, which now though
4509 * has a channel context assigned ... this results in issues.
4510 *
4511 * To work around this (for now) simply deauth here again if we're
4512 * now connected.
4513 */
4514 if (ifmgd->associated && !sdata->local->wowlan) {
4515 u8 bssid[ETH_ALEN];
4516 struct cfg80211_deauth_request req = {
4517 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4518 .bssid = bssid,
4519 };
4520
4521 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4522 ieee80211_mgd_deauth(sdata, &req);
4523 }
4524
4525 sdata_unlock(sdata);
4526 }
4527
4528 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4529 {
4530 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4531
4532 sdata_lock(sdata);
4533 if (!ifmgd->associated) {
4534 sdata_unlock(sdata);
4535 return;
4536 }
4537
4538 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4539 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4540 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4541 ieee80211_sta_connection_lost(sdata,
4542 ifmgd->associated->bssid,
4543 WLAN_REASON_UNSPECIFIED,
4544 true);
4545 sdata_unlock(sdata);
4546 return;
4547 }
4548 sdata_unlock(sdata);
4549 }
4550 #endif
4551
4552 /* interface setup */
4553 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4554 {
4555 struct ieee80211_if_managed *ifmgd;
4556
4557 ifmgd = &sdata->u.mgd;
4558 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4559 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4560 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4561 ieee80211_beacon_connection_loss_work);
4562 INIT_WORK(&ifmgd->csa_connection_drop_work,
4563 ieee80211_csa_connection_drop_work);
4564 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4565 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4566 ieee80211_tdls_peer_del_work);
4567 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
4568 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
4569 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
4570 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
4571 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4572 ieee80211_sta_handle_tspec_ac_params_wk);
4573
4574 ifmgd->flags = 0;
4575 ifmgd->powersave = sdata->wdev.ps;
4576 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4577 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4578 ifmgd->p2p_noa_index = -1;
4579
4580 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4581 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4582 else
4583 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4584
4585 /* Setup TDLS data */
4586 spin_lock_init(&ifmgd->teardown_lock);
4587 ifmgd->teardown_skb = NULL;
4588 ifmgd->orig_teardown_skb = NULL;
4589 }
4590
4591 /* scan finished notification */
4592 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4593 {
4594 struct ieee80211_sub_if_data *sdata;
4595
4596 /* Restart STA timers */
4597 rcu_read_lock();
4598 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4599 if (ieee80211_sdata_running(sdata))
4600 ieee80211_restart_sta_timer(sdata);
4601 }
4602 rcu_read_unlock();
4603 }
4604
4605 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4606 struct cfg80211_bss *cbss)
4607 {
4608 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4609 const u8 *ht_cap_ie, *vht_cap_ie;
4610 const struct ieee80211_ht_cap *ht_cap;
4611 const struct ieee80211_vht_cap *vht_cap;
4612 u8 chains = 1;
4613
4614 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4615 return chains;
4616
4617 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4618 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4619 ht_cap = (void *)(ht_cap_ie + 2);
4620 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4621 /*
4622 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4623 * "Tx Unequal Modulation Supported" fields.
4624 */
4625 }
4626
4627 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4628 return chains;
4629
4630 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4631 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4632 u8 nss;
4633 u16 tx_mcs_map;
4634
4635 vht_cap = (void *)(vht_cap_ie + 2);
4636 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4637 for (nss = 8; nss > 0; nss--) {
4638 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4639 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4640 break;
4641 }
4642 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4643 chains = max(chains, nss);
4644 }
4645
4646 return chains;
4647 }
4648
4649 static bool
4650 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband,
4651 const struct ieee80211_he_operation *he_op)
4652 {
4653 const struct ieee80211_sta_he_cap *sta_he_cap =
4654 ieee80211_get_he_sta_cap(sband);
4655 u16 ap_min_req_set;
4656 int i;
4657
4658 if (!sta_he_cap || !he_op)
4659 return false;
4660
4661 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4662
4663 /* Need to go over for 80MHz, 160MHz and for 80+80 */
4664 for (i = 0; i < 3; i++) {
4665 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
4666 &sta_he_cap->he_mcs_nss_supp;
4667 u16 sta_mcs_map_rx =
4668 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
4669 u16 sta_mcs_map_tx =
4670 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
4671 u8 nss;
4672 bool verified = true;
4673
4674 /*
4675 * For each band there is a maximum of 8 spatial streams
4676 * possible. Each of the sta_mcs_map_* is a 16-bit struct built
4677 * of 2 bits per NSS (1-8), with the values defined in enum
4678 * ieee80211_he_mcs_support. Need to make sure STA TX and RX
4679 * capabilities aren't less than the AP's minimum requirements
4680 * for this HE BSS per SS.
4681 * It is enough to find one such band that meets the reqs.
4682 */
4683 for (nss = 8; nss > 0; nss--) {
4684 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
4685 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
4686 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4687
4688 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4689 continue;
4690
4691 /*
4692 * Make sure the HE AP doesn't require MCSs that aren't
4693 * supported by the client
4694 */
4695 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4696 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4697 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
4698 verified = false;
4699 break;
4700 }
4701 }
4702
4703 if (verified)
4704 return true;
4705 }
4706
4707 /* If here, STA doesn't meet AP's HE min requirements */
4708 return false;
4709 }
4710
4711 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4712 struct cfg80211_bss *cbss)
4713 {
4714 struct ieee80211_local *local = sdata->local;
4715 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4716 const struct ieee80211_ht_cap *ht_cap = NULL;
4717 const struct ieee80211_ht_operation *ht_oper = NULL;
4718 const struct ieee80211_vht_operation *vht_oper = NULL;
4719 const struct ieee80211_he_operation *he_oper = NULL;
4720 struct ieee80211_supported_band *sband;
4721 struct cfg80211_chan_def chandef;
4722 int ret;
4723 u32 i;
4724 bool have_80mhz;
4725
4726 sband = local->hw.wiphy->bands[cbss->channel->band];
4727
4728 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4729 IEEE80211_STA_DISABLE_80P80MHZ |
4730 IEEE80211_STA_DISABLE_160MHZ);
4731
4732 rcu_read_lock();
4733
4734 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4735 sband->ht_cap.ht_supported) {
4736 const u8 *ht_oper_ie, *ht_cap_ie;
4737
4738 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4739 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4740 ht_oper = (void *)(ht_oper_ie + 2);
4741
4742 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4743 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4744 ht_cap = (void *)(ht_cap_ie + 2);
4745
4746 if (!ht_cap) {
4747 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4748 ht_oper = NULL;
4749 }
4750 }
4751
4752 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4753 sband->vht_cap.vht_supported) {
4754 const u8 *vht_oper_ie, *vht_cap;
4755
4756 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4757 WLAN_EID_VHT_OPERATION);
4758 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4759 vht_oper = (void *)(vht_oper_ie + 2);
4760 if (vht_oper && !ht_oper) {
4761 vht_oper = NULL;
4762 sdata_info(sdata,
4763 "AP advertised VHT without HT, disabling both\n");
4764 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4765 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4766 }
4767
4768 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4769 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4770 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4771 vht_oper = NULL;
4772 }
4773 }
4774
4775 if (!ieee80211_get_he_sta_cap(sband))
4776 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4777
4778 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) {
4779 const struct cfg80211_bss_ies *ies;
4780 const u8 *he_oper_ie;
4781
4782 ies = rcu_dereference(cbss->ies);
4783 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION,
4784 ies->data, ies->len);
4785 if (he_oper_ie &&
4786 he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3]))
4787 he_oper = (void *)(he_oper_ie + 3);
4788 else
4789 he_oper = NULL;
4790
4791 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper))
4792 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4793 }
4794
4795 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4796 have_80mhz = false;
4797 for (i = 0; i < sband->n_channels; i++) {
4798 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4799 IEEE80211_CHAN_NO_80MHZ))
4800 continue;
4801
4802 have_80mhz = true;
4803 break;
4804 }
4805
4806 if (!have_80mhz)
4807 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4808
4809 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4810 cbss->channel,
4811 ht_oper, vht_oper, he_oper,
4812 &chandef, false);
4813
4814 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4815 local->rx_chains);
4816
4817 rcu_read_unlock();
4818
4819 /* will change later if needed */
4820 sdata->smps_mode = IEEE80211_SMPS_OFF;
4821
4822 mutex_lock(&local->mtx);
4823 /*
4824 * If this fails (possibly due to channel context sharing
4825 * on incompatible channels, e.g. 80+80 and 160 sharing the
4826 * same control channel) try to use a smaller bandwidth.
4827 */
4828 ret = ieee80211_vif_use_channel(sdata, &chandef,
4829 IEEE80211_CHANCTX_SHARED);
4830
4831 /* don't downgrade for 5 and 10 MHz channels, though. */
4832 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4833 chandef.width == NL80211_CHAN_WIDTH_10)
4834 goto out;
4835
4836 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4837 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4838 ret = ieee80211_vif_use_channel(sdata, &chandef,
4839 IEEE80211_CHANCTX_SHARED);
4840 }
4841 out:
4842 mutex_unlock(&local->mtx);
4843 return ret;
4844 }
4845
4846 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies,
4847 u8 *dtim_count, u8 *dtim_period)
4848 {
4849 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len);
4850 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data,
4851 ies->len);
4852 const struct ieee80211_tim_ie *tim = NULL;
4853 const struct ieee80211_bssid_index *idx;
4854 bool valid = tim_ie && tim_ie[1] >= 2;
4855
4856 if (valid)
4857 tim = (void *)(tim_ie + 2);
4858
4859 if (dtim_count)
4860 *dtim_count = valid ? tim->dtim_count : 0;
4861
4862 if (dtim_period)
4863 *dtim_period = valid ? tim->dtim_period : 0;
4864
4865 /* Check if value is overridden by non-transmitted profile */
4866 if (!idx_ie || idx_ie[1] < 3)
4867 return valid;
4868
4869 idx = (void *)(idx_ie + 2);
4870
4871 if (dtim_count)
4872 *dtim_count = idx->dtim_count;
4873
4874 if (dtim_period)
4875 *dtim_period = idx->dtim_period;
4876
4877 return true;
4878 }
4879
4880 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4881 struct cfg80211_bss *cbss, bool assoc,
4882 bool override)
4883 {
4884 struct ieee80211_local *local = sdata->local;
4885 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4886 struct ieee80211_bss *bss = (void *)cbss->priv;
4887 struct sta_info *new_sta = NULL;
4888 struct ieee80211_supported_band *sband;
4889 bool have_sta = false;
4890 int err;
4891
4892 sband = local->hw.wiphy->bands[cbss->channel->band];
4893
4894 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4895 return -EINVAL;
4896
4897 /* If a reconfig is happening, bail out */
4898 if (local->in_reconfig)
4899 return -EBUSY;
4900
4901 if (assoc) {
4902 rcu_read_lock();
4903 have_sta = sta_info_get(sdata, cbss->bssid);
4904 rcu_read_unlock();
4905 }
4906
4907 if (!have_sta) {
4908 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4909 if (!new_sta)
4910 return -ENOMEM;
4911 }
4912
4913 /*
4914 * Set up the information for the new channel before setting the
4915 * new channel. We can't - completely race-free - change the basic
4916 * rates bitmap and the channel (sband) that it refers to, but if
4917 * we set it up before we at least avoid calling into the driver's
4918 * bss_info_changed() method with invalid information (since we do
4919 * call that from changing the channel - only for IDLE and perhaps
4920 * some others, but ...).
4921 *
4922 * So to avoid that, just set up all the new information before the
4923 * channel, but tell the driver to apply it only afterwards, since
4924 * it might need the new channel for that.
4925 */
4926 if (new_sta) {
4927 u32 rates = 0, basic_rates = 0;
4928 bool have_higher_than_11mbit;
4929 int min_rate = INT_MAX, min_rate_index = -1;
4930 const struct cfg80211_bss_ies *ies;
4931 int shift = ieee80211_vif_get_shift(&sdata->vif);
4932
4933 ieee80211_get_rates(sband, bss->supp_rates,
4934 bss->supp_rates_len,
4935 &rates, &basic_rates,
4936 &have_higher_than_11mbit,
4937 &min_rate, &min_rate_index,
4938 shift);
4939
4940 /*
4941 * This used to be a workaround for basic rates missing
4942 * in the association response frame. Now that we no
4943 * longer use the basic rates from there, it probably
4944 * doesn't happen any more, but keep the workaround so
4945 * in case some *other* APs are buggy in different ways
4946 * we can connect -- with a warning.
4947 */
4948 if (!basic_rates && min_rate_index >= 0) {
4949 sdata_info(sdata,
4950 "No basic rates, using min rate instead\n");
4951 basic_rates = BIT(min_rate_index);
4952 }
4953
4954 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4955 sdata->vif.bss_conf.basic_rates = basic_rates;
4956
4957 /* cf. IEEE 802.11 9.2.12 */
4958 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4959 have_higher_than_11mbit)
4960 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4961 else
4962 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4963
4964 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4965
4966 /* set timing information */
4967 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4968 rcu_read_lock();
4969 ies = rcu_dereference(cbss->beacon_ies);
4970 if (ies) {
4971 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4972 sdata->vif.bss_conf.sync_device_ts =
4973 bss->device_ts_beacon;
4974
4975 ieee80211_get_dtim(ies,
4976 &sdata->vif.bss_conf.sync_dtim_count,
4977 NULL);
4978 } else if (!ieee80211_hw_check(&sdata->local->hw,
4979 TIMING_BEACON_ONLY)) {
4980 ies = rcu_dereference(cbss->proberesp_ies);
4981 /* must be non-NULL since beacon IEs were NULL */
4982 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4983 sdata->vif.bss_conf.sync_device_ts =
4984 bss->device_ts_presp;
4985 sdata->vif.bss_conf.sync_dtim_count = 0;
4986 } else {
4987 sdata->vif.bss_conf.sync_tsf = 0;
4988 sdata->vif.bss_conf.sync_device_ts = 0;
4989 sdata->vif.bss_conf.sync_dtim_count = 0;
4990 }
4991 rcu_read_unlock();
4992 }
4993
4994 if (new_sta || override) {
4995 err = ieee80211_prep_channel(sdata, cbss);
4996 if (err) {
4997 if (new_sta)
4998 sta_info_free(local, new_sta);
4999 return -EINVAL;
5000 }
5001 }
5002
5003 if (new_sta) {
5004 /*
5005 * tell driver about BSSID, basic rates and timing
5006 * this was set up above, before setting the channel
5007 */
5008 ieee80211_bss_info_change_notify(sdata,
5009 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
5010 BSS_CHANGED_BEACON_INT);
5011
5012 if (assoc)
5013 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
5014
5015 err = sta_info_insert(new_sta);
5016 new_sta = NULL;
5017 if (err) {
5018 sdata_info(sdata,
5019 "failed to insert STA entry for the AP (error %d)\n",
5020 err);
5021 return err;
5022 }
5023 } else
5024 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
5025
5026 /* Cancel scan to ensure that nothing interferes with connection */
5027 if (local->scanning)
5028 ieee80211_scan_cancel(local);
5029
5030 return 0;
5031 }
5032
5033 /* config hooks */
5034 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
5035 struct cfg80211_auth_request *req)
5036 {
5037 struct ieee80211_local *local = sdata->local;
5038 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5039 struct ieee80211_mgd_auth_data *auth_data;
5040 u16 auth_alg;
5041 int err;
5042 bool cont_auth;
5043
5044 /* prepare auth data structure */
5045
5046 switch (req->auth_type) {
5047 case NL80211_AUTHTYPE_OPEN_SYSTEM:
5048 auth_alg = WLAN_AUTH_OPEN;
5049 break;
5050 case NL80211_AUTHTYPE_SHARED_KEY:
5051 if (IS_ERR(local->wep_tx_tfm))
5052 return -EOPNOTSUPP;
5053 auth_alg = WLAN_AUTH_SHARED_KEY;
5054 break;
5055 case NL80211_AUTHTYPE_FT:
5056 auth_alg = WLAN_AUTH_FT;
5057 break;
5058 case NL80211_AUTHTYPE_NETWORK_EAP:
5059 auth_alg = WLAN_AUTH_LEAP;
5060 break;
5061 case NL80211_AUTHTYPE_SAE:
5062 auth_alg = WLAN_AUTH_SAE;
5063 break;
5064 case NL80211_AUTHTYPE_FILS_SK:
5065 auth_alg = WLAN_AUTH_FILS_SK;
5066 break;
5067 case NL80211_AUTHTYPE_FILS_SK_PFS:
5068 auth_alg = WLAN_AUTH_FILS_SK_PFS;
5069 break;
5070 case NL80211_AUTHTYPE_FILS_PK:
5071 auth_alg = WLAN_AUTH_FILS_PK;
5072 break;
5073 default:
5074 return -EOPNOTSUPP;
5075 }
5076
5077 if (ifmgd->assoc_data)
5078 return -EBUSY;
5079
5080 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
5081 req->ie_len, GFP_KERNEL);
5082 if (!auth_data)
5083 return -ENOMEM;
5084
5085 auth_data->bss = req->bss;
5086
5087 if (req->auth_data_len >= 4) {
5088 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
5089 __le16 *pos = (__le16 *) req->auth_data;
5090
5091 auth_data->sae_trans = le16_to_cpu(pos[0]);
5092 auth_data->sae_status = le16_to_cpu(pos[1]);
5093 }
5094 memcpy(auth_data->data, req->auth_data + 4,
5095 req->auth_data_len - 4);
5096 auth_data->data_len += req->auth_data_len - 4;
5097 }
5098
5099 /* Check if continuing authentication or trying to authenticate with the
5100 * same BSS that we were in the process of authenticating with and avoid
5101 * removal and re-addition of the STA entry in
5102 * ieee80211_prep_connection().
5103 */
5104 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss;
5105
5106 if (req->ie && req->ie_len) {
5107 memcpy(&auth_data->data[auth_data->data_len],
5108 req->ie, req->ie_len);
5109 auth_data->data_len += req->ie_len;
5110 }
5111
5112 if (req->key && req->key_len) {
5113 auth_data->key_len = req->key_len;
5114 auth_data->key_idx = req->key_idx;
5115 memcpy(auth_data->key, req->key, req->key_len);
5116 }
5117
5118 auth_data->algorithm = auth_alg;
5119
5120 /* try to authenticate/probe */
5121
5122 if (ifmgd->auth_data) {
5123 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
5124 auth_data->peer_confirmed =
5125 ifmgd->auth_data->peer_confirmed;
5126 }
5127 ieee80211_destroy_auth_data(sdata, cont_auth);
5128 }
5129
5130 /* prep auth_data so we don't go into idle on disassoc */
5131 ifmgd->auth_data = auth_data;
5132
5133 /* If this is continuation of an ongoing SAE authentication exchange
5134 * (i.e., request to send SAE Confirm) and the peer has already
5135 * confirmed, mark authentication completed since we are about to send
5136 * out SAE Confirm.
5137 */
5138 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
5139 auth_data->peer_confirmed && auth_data->sae_trans == 2)
5140 ieee80211_mark_sta_auth(sdata, req->bss->bssid);
5141
5142 if (ifmgd->associated) {
5143 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5144
5145 sdata_info(sdata,
5146 "disconnect from AP %pM for new auth to %pM\n",
5147 ifmgd->associated->bssid, req->bss->bssid);
5148 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5149 WLAN_REASON_UNSPECIFIED,
5150 false, frame_buf);
5151
5152 ieee80211_report_disconnect(sdata, frame_buf,
5153 sizeof(frame_buf), true,
5154 WLAN_REASON_UNSPECIFIED);
5155 }
5156
5157 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
5158
5159 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false);
5160 if (err)
5161 goto err_clear;
5162
5163 err = ieee80211_auth(sdata);
5164 if (err) {
5165 sta_info_destroy_addr(sdata, req->bss->bssid);
5166 goto err_clear;
5167 }
5168
5169 /* hold our own reference */
5170 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
5171 return 0;
5172
5173 err_clear:
5174 eth_zero_addr(ifmgd->bssid);
5175 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5176 ifmgd->auth_data = NULL;
5177 mutex_lock(&sdata->local->mtx);
5178 ieee80211_vif_release_channel(sdata);
5179 mutex_unlock(&sdata->local->mtx);
5180 kfree(auth_data);
5181 return err;
5182 }
5183
5184 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
5185 struct cfg80211_assoc_request *req)
5186 {
5187 struct ieee80211_local *local = sdata->local;
5188 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5189 struct ieee80211_bss *bss = (void *)req->bss->priv;
5190 struct ieee80211_mgd_assoc_data *assoc_data;
5191 const struct cfg80211_bss_ies *beacon_ies;
5192 struct ieee80211_supported_band *sband;
5193 const u8 *ssidie, *ht_ie, *vht_ie;
5194 int i, err;
5195 bool override = false;
5196
5197 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
5198 if (!assoc_data)
5199 return -ENOMEM;
5200
5201 rcu_read_lock();
5202 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
5203 if (!ssidie) {
5204 rcu_read_unlock();
5205 kfree(assoc_data);
5206 return -EINVAL;
5207 }
5208 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
5209 assoc_data->ssid_len = ssidie[1];
5210 rcu_read_unlock();
5211
5212 if (ifmgd->associated) {
5213 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5214
5215 sdata_info(sdata,
5216 "disconnect from AP %pM for new assoc to %pM\n",
5217 ifmgd->associated->bssid, req->bss->bssid);
5218 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5219 WLAN_REASON_UNSPECIFIED,
5220 false, frame_buf);
5221
5222 ieee80211_report_disconnect(sdata, frame_buf,
5223 sizeof(frame_buf), true,
5224 WLAN_REASON_UNSPECIFIED);
5225 }
5226
5227 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
5228 err = -EBUSY;
5229 goto err_free;
5230 }
5231
5232 if (ifmgd->assoc_data) {
5233 err = -EBUSY;
5234 goto err_free;
5235 }
5236
5237 if (ifmgd->auth_data) {
5238 bool match;
5239
5240 /* keep sta info, bssid if matching */
5241 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
5242 ieee80211_destroy_auth_data(sdata, match);
5243 }
5244
5245 /* prepare assoc data */
5246
5247 ifmgd->beacon_crc_valid = false;
5248
5249 assoc_data->wmm = bss->wmm_used &&
5250 (local->hw.queues >= IEEE80211_NUM_ACS);
5251
5252 /*
5253 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
5254 * We still associate in non-HT mode (11a/b/g) if any one of these
5255 * ciphers is configured as pairwise.
5256 * We can set this to true for non-11n hardware, that'll be checked
5257 * separately along with the peer capabilities.
5258 */
5259 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
5260 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
5261 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
5262 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5263 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5264 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5265 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5266 netdev_info(sdata->dev,
5267 "disabling HE/HT/VHT due to WEP/TKIP use\n");
5268 }
5269 }
5270
5271 /* Also disable HT if we don't support it or the AP doesn't use WMM */
5272 sband = local->hw.wiphy->bands[req->bss->channel->band];
5273 if (!sband->ht_cap.ht_supported ||
5274 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5275 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5276 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5277 if (!bss->wmm_used &&
5278 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5279 netdev_info(sdata->dev,
5280 "disabling HT as WMM/QoS is not supported by the AP\n");
5281 }
5282
5283 /* disable VHT if we don't support it or the AP doesn't use WMM */
5284 if (!sband->vht_cap.vht_supported ||
5285 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5286 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5287 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5288 if (!bss->wmm_used &&
5289 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5290 netdev_info(sdata->dev,
5291 "disabling VHT as WMM/QoS is not supported by the AP\n");
5292 }
5293
5294 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
5295 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
5296 sizeof(ifmgd->ht_capa_mask));
5297
5298 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
5299 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
5300 sizeof(ifmgd->vht_capa_mask));
5301
5302 if (req->ie && req->ie_len) {
5303 memcpy(assoc_data->ie, req->ie, req->ie_len);
5304 assoc_data->ie_len = req->ie_len;
5305 }
5306
5307 if (req->fils_kek) {
5308 /* should already be checked in cfg80211 - so warn */
5309 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
5310 err = -EINVAL;
5311 goto err_free;
5312 }
5313 memcpy(assoc_data->fils_kek, req->fils_kek,
5314 req->fils_kek_len);
5315 assoc_data->fils_kek_len = req->fils_kek_len;
5316 }
5317
5318 if (req->fils_nonces)
5319 memcpy(assoc_data->fils_nonces, req->fils_nonces,
5320 2 * FILS_NONCE_LEN);
5321
5322 assoc_data->bss = req->bss;
5323
5324 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
5325 if (ifmgd->powersave)
5326 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
5327 else
5328 sdata->smps_mode = IEEE80211_SMPS_OFF;
5329 } else
5330 sdata->smps_mode = ifmgd->req_smps;
5331
5332 assoc_data->capability = req->bss->capability;
5333 assoc_data->supp_rates = bss->supp_rates;
5334 assoc_data->supp_rates_len = bss->supp_rates_len;
5335
5336 rcu_read_lock();
5337 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
5338 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
5339 assoc_data->ap_ht_param =
5340 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
5341 else
5342 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5343 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
5344 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
5345 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
5346 sizeof(struct ieee80211_vht_cap));
5347 else
5348 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5349 rcu_read_unlock();
5350
5351 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
5352 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
5353 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
5354 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
5355
5356 if (bss->wmm_used && bss->uapsd_supported &&
5357 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
5358 assoc_data->uapsd = true;
5359 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
5360 } else {
5361 assoc_data->uapsd = false;
5362 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
5363 }
5364
5365 if (req->prev_bssid)
5366 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
5367
5368 if (req->use_mfp) {
5369 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
5370 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
5371 } else {
5372 ifmgd->mfp = IEEE80211_MFP_DISABLED;
5373 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
5374 }
5375
5376 if (req->flags & ASSOC_REQ_USE_RRM)
5377 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
5378 else
5379 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
5380
5381 if (req->crypto.control_port)
5382 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
5383 else
5384 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
5385
5386 sdata->control_port_protocol = req->crypto.control_port_ethertype;
5387 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
5388 sdata->control_port_over_nl80211 =
5389 req->crypto.control_port_over_nl80211;
5390 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
5391 sdata->vif.type);
5392
5393 /* kick off associate process */
5394
5395 ifmgd->assoc_data = assoc_data;
5396 ifmgd->dtim_period = 0;
5397 ifmgd->have_beacon = false;
5398
5399 /* override HT/VHT configuration only if the AP and we support it */
5400 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
5401 struct ieee80211_sta_ht_cap sta_ht_cap;
5402
5403 if (req->flags & ASSOC_REQ_DISABLE_HT)
5404 override = true;
5405
5406 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
5407 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
5408
5409 /* check for 40 MHz disable override */
5410 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
5411 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
5412 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
5413 override = true;
5414
5415 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
5416 req->flags & ASSOC_REQ_DISABLE_VHT)
5417 override = true;
5418 }
5419
5420 if (req->flags & ASSOC_REQ_DISABLE_HT) {
5421 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5422 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5423 }
5424
5425 if (req->flags & ASSOC_REQ_DISABLE_VHT)
5426 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5427
5428 err = ieee80211_prep_connection(sdata, req->bss, true, override);
5429 if (err)
5430 goto err_clear;
5431
5432 rcu_read_lock();
5433 beacon_ies = rcu_dereference(req->bss->beacon_ies);
5434
5435 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
5436 !beacon_ies) {
5437 /*
5438 * Wait up to one beacon interval ...
5439 * should this be more if we miss one?
5440 */
5441 sdata_info(sdata, "waiting for beacon from %pM\n",
5442 ifmgd->bssid);
5443 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
5444 assoc_data->timeout_started = true;
5445 assoc_data->need_beacon = true;
5446 } else if (beacon_ies) {
5447 const u8 *ie;
5448 u8 dtim_count = 0;
5449
5450 ieee80211_get_dtim(beacon_ies, &dtim_count,
5451 &ifmgd->dtim_period);
5452
5453 ifmgd->have_beacon = true;
5454 assoc_data->timeout = jiffies;
5455 assoc_data->timeout_started = true;
5456
5457 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5458 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
5459 sdata->vif.bss_conf.sync_device_ts =
5460 bss->device_ts_beacon;
5461 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
5462 }
5463
5464 ie = cfg80211_find_ext_ie(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
5465 beacon_ies->data, beacon_ies->len);
5466 if (ie && ie[1] >= 3)
5467 sdata->vif.bss_conf.profile_periodicity = ie[4];
5468
5469 ie = cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY,
5470 beacon_ies->data, beacon_ies->len);
5471 if (ie && ie[1] >= 11 &&
5472 (ie[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
5473 sdata->vif.bss_conf.ema_ap = true;
5474 } else {
5475 assoc_data->timeout = jiffies;
5476 assoc_data->timeout_started = true;
5477 }
5478 rcu_read_unlock();
5479
5480 run_again(sdata, assoc_data->timeout);
5481
5482 if (bss->corrupt_data) {
5483 char *corrupt_type = "data";
5484 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
5485 if (bss->corrupt_data &
5486 IEEE80211_BSS_CORRUPT_PROBE_RESP)
5487 corrupt_type = "beacon and probe response";
5488 else
5489 corrupt_type = "beacon";
5490 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
5491 corrupt_type = "probe response";
5492 sdata_info(sdata, "associating with AP with corrupt %s\n",
5493 corrupt_type);
5494 }
5495
5496 return 0;
5497 err_clear:
5498 eth_zero_addr(ifmgd->bssid);
5499 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5500 ifmgd->assoc_data = NULL;
5501 err_free:
5502 kfree(assoc_data);
5503 return err;
5504 }
5505
5506 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
5507 struct cfg80211_deauth_request *req)
5508 {
5509 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5510 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5511 bool tx = !req->local_state_change;
5512
5513 if (ifmgd->auth_data &&
5514 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
5515 sdata_info(sdata,
5516 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
5517 req->bssid, req->reason_code,
5518 ieee80211_get_reason_code_string(req->reason_code));
5519
5520 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5521 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5522 IEEE80211_STYPE_DEAUTH,
5523 req->reason_code, tx,
5524 frame_buf);
5525 ieee80211_destroy_auth_data(sdata, false);
5526 ieee80211_report_disconnect(sdata, frame_buf,
5527 sizeof(frame_buf), true,
5528 req->reason_code);
5529
5530 return 0;
5531 }
5532
5533 if (ifmgd->assoc_data &&
5534 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
5535 sdata_info(sdata,
5536 "aborting association with %pM by local choice (Reason: %u=%s)\n",
5537 req->bssid, req->reason_code,
5538 ieee80211_get_reason_code_string(req->reason_code));
5539
5540 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5541 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5542 IEEE80211_STYPE_DEAUTH,
5543 req->reason_code, tx,
5544 frame_buf);
5545 ieee80211_destroy_assoc_data(sdata, false, true);
5546 ieee80211_report_disconnect(sdata, frame_buf,
5547 sizeof(frame_buf), true,
5548 req->reason_code);
5549 return 0;
5550 }
5551
5552 if (ifmgd->associated &&
5553 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5554 sdata_info(sdata,
5555 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5556 req->bssid, req->reason_code,
5557 ieee80211_get_reason_code_string(req->reason_code));
5558
5559 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5560 req->reason_code, tx, frame_buf);
5561 ieee80211_report_disconnect(sdata, frame_buf,
5562 sizeof(frame_buf), true,
5563 req->reason_code);
5564 return 0;
5565 }
5566
5567 return -ENOTCONN;
5568 }
5569
5570 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5571 struct cfg80211_disassoc_request *req)
5572 {
5573 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5574 u8 bssid[ETH_ALEN];
5575 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5576
5577 /*
5578 * cfg80211 should catch this ... but it's racy since
5579 * we can receive a disassoc frame, process it, hand it
5580 * to cfg80211 while that's in a locked section already
5581 * trying to tell us that the user wants to disconnect.
5582 */
5583 if (ifmgd->associated != req->bss)
5584 return -ENOLINK;
5585
5586 sdata_info(sdata,
5587 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5588 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5589
5590 memcpy(bssid, req->bss->bssid, ETH_ALEN);
5591 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5592 req->reason_code, !req->local_state_change,
5593 frame_buf);
5594
5595 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5596 req->reason_code);
5597
5598 return 0;
5599 }
5600
5601 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5602 {
5603 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5604
5605 /*
5606 * Make sure some work items will not run after this,
5607 * they will not do anything but might not have been
5608 * cancelled when disconnecting.
5609 */
5610 cancel_work_sync(&ifmgd->monitor_work);
5611 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5612 cancel_work_sync(&ifmgd->request_smps_work);
5613 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5614 cancel_work_sync(&ifmgd->chswitch_work);
5615 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5616
5617 sdata_lock(sdata);
5618 if (ifmgd->assoc_data) {
5619 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5620 ieee80211_destroy_assoc_data(sdata, false, false);
5621 cfg80211_assoc_timeout(sdata->dev, bss);
5622 }
5623 if (ifmgd->auth_data)
5624 ieee80211_destroy_auth_data(sdata, false);
5625 spin_lock_bh(&ifmgd->teardown_lock);
5626 if (ifmgd->teardown_skb) {
5627 kfree_skb(ifmgd->teardown_skb);
5628 ifmgd->teardown_skb = NULL;
5629 ifmgd->orig_teardown_skb = NULL;
5630 }
5631 kfree(ifmgd->assoc_req_ies);
5632 ifmgd->assoc_req_ies = NULL;
5633 ifmgd->assoc_req_ies_len = 0;
5634 spin_unlock_bh(&ifmgd->teardown_lock);
5635 del_timer_sync(&ifmgd->timer);
5636 sdata_unlock(sdata);
5637 }
5638
5639 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5640 enum nl80211_cqm_rssi_threshold_event rssi_event,
5641 s32 rssi_level,
5642 gfp_t gfp)
5643 {
5644 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5645
5646 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5647
5648 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5649 }
5650 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5651
5652 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5653 {
5654 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5655
5656 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5657
5658 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5659 }
5660 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
Linux with added FPC-III support