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1 /*
2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15
16 #include <linux/delay.h>
17 #include <linux/if_ether.h>
18 #include <linux/skbuff.h>
19 #include <linux/if_arp.h>
20 #include <linux/etherdevice.h>
21 #include <linux/moduleparam.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/crc32.h>
24 #include <linux/slab.h>
25 #include <linux/export.h>
26 #include <net/mac80211.h>
27 #include <asm/unaligned.h>
28
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
31 #include "rate.h"
32 #include "led.h"
33 #include "fils_aead.h"
34
35 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
36 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
37 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
38 #define IEEE80211_AUTH_MAX_TRIES 3
39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
41 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
42 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
43 #define IEEE80211_ASSOC_MAX_TRIES 3
44
45 static int max_nullfunc_tries = 2;
46 module_param(max_nullfunc_tries, int, 0644);
47 MODULE_PARM_DESC(max_nullfunc_tries,
48 "Maximum nullfunc tx tries before disconnecting (reason 4).");
49
50 static int max_probe_tries = 5;
51 module_param(max_probe_tries, int, 0644);
52 MODULE_PARM_DESC(max_probe_tries,
53 "Maximum probe tries before disconnecting (reason 4).");
54
55 /*
56 * Beacon loss timeout is calculated as N frames times the
57 * advertised beacon interval. This may need to be somewhat
58 * higher than what hardware might detect to account for
59 * delays in the host processing frames. But since we also
60 * probe on beacon miss before declaring the connection lost
61 * default to what we want.
62 */
63 static int beacon_loss_count = 7;
64 module_param(beacon_loss_count, int, 0644);
65 MODULE_PARM_DESC(beacon_loss_count,
66 "Number of beacon intervals before we decide beacon was lost.");
67
68 /*
69 * Time the connection can be idle before we probe
70 * it to see if we can still talk to the AP.
71 */
72 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
73 /*
74 * Time we wait for a probe response after sending
75 * a probe request because of beacon loss or for
76 * checking the connection still works.
77 */
78 static int probe_wait_ms = 500;
79 module_param(probe_wait_ms, int, 0644);
80 MODULE_PARM_DESC(probe_wait_ms,
81 "Maximum time(ms) to wait for probe response"
82 " before disconnecting (reason 4).");
83
84 /*
85 * How many Beacon frames need to have been used in average signal strength
86 * before starting to indicate signal change events.
87 */
88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
89
90 /*
91 * We can have multiple work items (and connection probing)
92 * scheduling this timer, but we need to take care to only
93 * reschedule it when it should fire _earlier_ than it was
94 * asked for before, or if it's not pending right now. This
95 * function ensures that. Note that it then is required to
96 * run this function for all timeouts after the first one
97 * has happened -- the work that runs from this timer will
98 * do that.
99 */
100 static void run_again(struct ieee80211_sub_if_data *sdata,
101 unsigned long timeout)
102 {
103 sdata_assert_lock(sdata);
104
105 if (!timer_pending(&sdata->u.mgd.timer) ||
106 time_before(timeout, sdata->u.mgd.timer.expires))
107 mod_timer(&sdata->u.mgd.timer, timeout);
108 }
109
110 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
111 {
112 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
113 return;
114
115 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
116 return;
117
118 mod_timer(&sdata->u.mgd.bcn_mon_timer,
119 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
120 }
121
122 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
123 {
124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
125
126 if (unlikely(!ifmgd->associated))
127 return;
128
129 if (ifmgd->probe_send_count)
130 ifmgd->probe_send_count = 0;
131
132 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
133 return;
134
135 mod_timer(&ifmgd->conn_mon_timer,
136 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
137 }
138
139 static int ecw2cw(int ecw)
140 {
141 return (1 << ecw) - 1;
142 }
143
144 static u32
145 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
146 struct ieee80211_supported_band *sband,
147 struct ieee80211_channel *channel,
148 const struct ieee80211_ht_operation *ht_oper,
149 const struct ieee80211_vht_operation *vht_oper,
150 struct cfg80211_chan_def *chandef, bool tracking)
151 {
152 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
153 struct cfg80211_chan_def vht_chandef;
154 struct ieee80211_sta_ht_cap sta_ht_cap;
155 u32 ht_cfreq, ret;
156
157 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
158 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
159
160 chandef->chan = channel;
161 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
162 chandef->center_freq1 = channel->center_freq;
163 chandef->center_freq2 = 0;
164
165 if (!ht_oper || !sta_ht_cap.ht_supported) {
166 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
167 goto out;
168 }
169
170 chandef->width = NL80211_CHAN_WIDTH_20;
171
172 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
173 channel->band);
174 /* check that channel matches the right operating channel */
175 if (!tracking && channel->center_freq != ht_cfreq) {
176 /*
177 * It's possible that some APs are confused here;
178 * Netgear WNDR3700 sometimes reports 4 higher than
179 * the actual channel in association responses, but
180 * since we look at probe response/beacon data here
181 * it should be OK.
182 */
183 sdata_info(sdata,
184 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
185 channel->center_freq, ht_cfreq,
186 ht_oper->primary_chan, channel->band);
187 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
188 goto out;
189 }
190
191 /* check 40 MHz support, if we have it */
192 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
193 ieee80211_chandef_ht_oper(ht_oper, chandef);
194 } else {
195 /* 40 MHz (and 80 MHz) must be supported for VHT */
196 ret = IEEE80211_STA_DISABLE_VHT;
197 /* also mark 40 MHz disabled */
198 ret |= IEEE80211_STA_DISABLE_40MHZ;
199 goto out;
200 }
201
202 if (!vht_oper || !sband->vht_cap.vht_supported) {
203 ret = IEEE80211_STA_DISABLE_VHT;
204 goto out;
205 }
206
207 vht_chandef = *chandef;
208 if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) {
209 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
210 sdata_info(sdata,
211 "AP VHT information is invalid, disable VHT\n");
212 ret = IEEE80211_STA_DISABLE_VHT;
213 goto out;
214 }
215
216 if (!cfg80211_chandef_valid(&vht_chandef)) {
217 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
218 sdata_info(sdata,
219 "AP VHT information is invalid, disable VHT\n");
220 ret = IEEE80211_STA_DISABLE_VHT;
221 goto out;
222 }
223
224 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
225 ret = 0;
226 goto out;
227 }
228
229 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
230 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
231 sdata_info(sdata,
232 "AP VHT information doesn't match HT, disable VHT\n");
233 ret = IEEE80211_STA_DISABLE_VHT;
234 goto out;
235 }
236
237 *chandef = vht_chandef;
238
239 ret = 0;
240
241 out:
242 /*
243 * When tracking the current AP, don't do any further checks if the
244 * new chandef is identical to the one we're currently using for the
245 * connection. This keeps us from playing ping-pong with regulatory,
246 * without it the following can happen (for example):
247 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
248 * - AP advertises regdom US
249 * - CRDA loads regdom US with 80 MHz prohibited (old database)
250 * - the code below detects an unsupported channel, downgrades, and
251 * we disconnect from the AP in the caller
252 * - disconnect causes CRDA to reload world regdomain and the game
253 * starts anew.
254 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
255 *
256 * It seems possible that there are still scenarios with CSA or real
257 * bandwidth changes where a this could happen, but those cases are
258 * less common and wouldn't completely prevent using the AP.
259 */
260 if (tracking &&
261 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
262 return ret;
263
264 /* don't print the message below for VHT mismatch if VHT is disabled */
265 if (ret & IEEE80211_STA_DISABLE_VHT)
266 vht_chandef = *chandef;
267
268 /*
269 * Ignore the DISABLED flag when we're already connected and only
270 * tracking the APs beacon for bandwidth changes - otherwise we
271 * might get disconnected here if we connect to an AP, update our
272 * regulatory information based on the AP's country IE and the
273 * information we have is wrong/outdated and disables the channel
274 * that we're actually using for the connection to the AP.
275 */
276 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
277 tracking ? 0 :
278 IEEE80211_CHAN_DISABLED)) {
279 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
280 ret = IEEE80211_STA_DISABLE_HT |
281 IEEE80211_STA_DISABLE_VHT;
282 break;
283 }
284
285 ret |= ieee80211_chandef_downgrade(chandef);
286 }
287
288 if (chandef->width != vht_chandef.width && !tracking)
289 sdata_info(sdata,
290 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
291
292 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
293 return ret;
294 }
295
296 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
297 struct sta_info *sta,
298 const struct ieee80211_ht_cap *ht_cap,
299 const struct ieee80211_ht_operation *ht_oper,
300 const struct ieee80211_vht_operation *vht_oper,
301 const u8 *bssid, u32 *changed)
302 {
303 struct ieee80211_local *local = sdata->local;
304 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
305 struct ieee80211_supported_band *sband;
306 struct ieee80211_channel *chan;
307 struct cfg80211_chan_def chandef;
308 u16 ht_opmode;
309 u32 flags;
310 enum ieee80211_sta_rx_bandwidth new_sta_bw;
311 int ret;
312
313 /* if HT was/is disabled, don't track any bandwidth changes */
314 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
315 return 0;
316
317 /* don't check VHT if we associated as non-VHT station */
318 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
319 vht_oper = NULL;
320
321 if (WARN_ON_ONCE(!sta))
322 return -EINVAL;
323
324 /*
325 * if bss configuration changed store the new one -
326 * this may be applicable even if channel is identical
327 */
328 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
329 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
330 *changed |= BSS_CHANGED_HT;
331 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
332 }
333
334 chan = sdata->vif.bss_conf.chandef.chan;
335 sband = local->hw.wiphy->bands[chan->band];
336
337 /* calculate new channel (type) based on HT/VHT operation IEs */
338 flags = ieee80211_determine_chantype(sdata, sband, chan,
339 ht_oper, vht_oper,
340 &chandef, true);
341
342 /*
343 * Downgrade the new channel if we associated with restricted
344 * capabilities. For example, if we associated as a 20 MHz STA
345 * to a 40 MHz AP (due to regulatory, capabilities or config
346 * reasons) then switching to a 40 MHz channel now won't do us
347 * any good -- we couldn't use it with the AP.
348 */
349 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
350 chandef.width == NL80211_CHAN_WIDTH_80P80)
351 flags |= ieee80211_chandef_downgrade(&chandef);
352 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
353 chandef.width == NL80211_CHAN_WIDTH_160)
354 flags |= ieee80211_chandef_downgrade(&chandef);
355 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
356 chandef.width > NL80211_CHAN_WIDTH_20)
357 flags |= ieee80211_chandef_downgrade(&chandef);
358
359 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
360 return 0;
361
362 sdata_info(sdata,
363 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
364 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
365 chandef.center_freq1, chandef.center_freq2);
366
367 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
368 IEEE80211_STA_DISABLE_VHT |
369 IEEE80211_STA_DISABLE_40MHZ |
370 IEEE80211_STA_DISABLE_80P80MHZ |
371 IEEE80211_STA_DISABLE_160MHZ)) ||
372 !cfg80211_chandef_valid(&chandef)) {
373 sdata_info(sdata,
374 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
375 ifmgd->bssid);
376 return -EINVAL;
377 }
378
379 switch (chandef.width) {
380 case NL80211_CHAN_WIDTH_20_NOHT:
381 case NL80211_CHAN_WIDTH_20:
382 new_sta_bw = IEEE80211_STA_RX_BW_20;
383 break;
384 case NL80211_CHAN_WIDTH_40:
385 new_sta_bw = IEEE80211_STA_RX_BW_40;
386 break;
387 case NL80211_CHAN_WIDTH_80:
388 new_sta_bw = IEEE80211_STA_RX_BW_80;
389 break;
390 case NL80211_CHAN_WIDTH_80P80:
391 case NL80211_CHAN_WIDTH_160:
392 new_sta_bw = IEEE80211_STA_RX_BW_160;
393 break;
394 default:
395 return -EINVAL;
396 }
397
398 if (new_sta_bw > sta->cur_max_bandwidth)
399 new_sta_bw = sta->cur_max_bandwidth;
400
401 if (new_sta_bw < sta->sta.bandwidth) {
402 sta->sta.bandwidth = new_sta_bw;
403 rate_control_rate_update(local, sband, sta,
404 IEEE80211_RC_BW_CHANGED);
405 }
406
407 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
408 if (ret) {
409 sdata_info(sdata,
410 "AP %pM changed bandwidth to incompatible one - disconnect\n",
411 ifmgd->bssid);
412 return ret;
413 }
414
415 if (new_sta_bw > sta->sta.bandwidth) {
416 sta->sta.bandwidth = new_sta_bw;
417 rate_control_rate_update(local, sband, sta,
418 IEEE80211_RC_BW_CHANGED);
419 }
420
421 return 0;
422 }
423
424 /* frame sending functions */
425
426 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
427 struct sk_buff *skb, u8 ap_ht_param,
428 struct ieee80211_supported_band *sband,
429 struct ieee80211_channel *channel,
430 enum ieee80211_smps_mode smps)
431 {
432 u8 *pos;
433 u32 flags = channel->flags;
434 u16 cap;
435 struct ieee80211_sta_ht_cap ht_cap;
436
437 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
438
439 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
440 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
441
442 /* determine capability flags */
443 cap = ht_cap.cap;
444
445 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
446 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
447 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
448 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
449 cap &= ~IEEE80211_HT_CAP_SGI_40;
450 }
451 break;
452 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
453 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
454 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
455 cap &= ~IEEE80211_HT_CAP_SGI_40;
456 }
457 break;
458 }
459
460 /*
461 * If 40 MHz was disabled associate as though we weren't
462 * capable of 40 MHz -- some broken APs will never fall
463 * back to trying to transmit in 20 MHz.
464 */
465 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
466 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
467 cap &= ~IEEE80211_HT_CAP_SGI_40;
468 }
469
470 /* set SM PS mode properly */
471 cap &= ~IEEE80211_HT_CAP_SM_PS;
472 switch (smps) {
473 case IEEE80211_SMPS_AUTOMATIC:
474 case IEEE80211_SMPS_NUM_MODES:
475 WARN_ON(1);
476 case IEEE80211_SMPS_OFF:
477 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
478 IEEE80211_HT_CAP_SM_PS_SHIFT;
479 break;
480 case IEEE80211_SMPS_STATIC:
481 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
482 IEEE80211_HT_CAP_SM_PS_SHIFT;
483 break;
484 case IEEE80211_SMPS_DYNAMIC:
485 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
486 IEEE80211_HT_CAP_SM_PS_SHIFT;
487 break;
488 }
489
490 /* reserve and fill IE */
491 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
492 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
493 }
494
495 /* This function determines vht capability flags for the association
496 * and builds the IE.
497 * Note - the function may set the owner of the MU-MIMO capability
498 */
499 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
500 struct sk_buff *skb,
501 struct ieee80211_supported_band *sband,
502 struct ieee80211_vht_cap *ap_vht_cap)
503 {
504 struct ieee80211_local *local = sdata->local;
505 u8 *pos;
506 u32 cap;
507 struct ieee80211_sta_vht_cap vht_cap;
508 u32 mask, ap_bf_sts, our_bf_sts;
509
510 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
511
512 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
513 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
514
515 /* determine capability flags */
516 cap = vht_cap.cap;
517
518 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
519 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
520
521 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
522 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
523 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
524 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
525 }
526
527 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
528 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
529 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
530 }
531
532 /*
533 * Some APs apparently get confused if our capabilities are better
534 * than theirs, so restrict what we advertise in the assoc request.
535 */
536 if (!(ap_vht_cap->vht_cap_info &
537 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
538 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
539 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
540 else if (!(ap_vht_cap->vht_cap_info &
541 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
542 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
543
544 /*
545 * If some other vif is using the MU-MIMO capablity we cannot associate
546 * using MU-MIMO - this will lead to contradictions in the group-id
547 * mechanism.
548 * Ownership is defined since association request, in order to avoid
549 * simultaneous associations with MU-MIMO.
550 */
551 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
552 bool disable_mu_mimo = false;
553 struct ieee80211_sub_if_data *other;
554
555 list_for_each_entry_rcu(other, &local->interfaces, list) {
556 if (other->vif.mu_mimo_owner) {
557 disable_mu_mimo = true;
558 break;
559 }
560 }
561 if (disable_mu_mimo)
562 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
563 else
564 sdata->vif.mu_mimo_owner = true;
565 }
566
567 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
568
569 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
570 our_bf_sts = cap & mask;
571
572 if (ap_bf_sts < our_bf_sts) {
573 cap &= ~mask;
574 cap |= ap_bf_sts;
575 }
576
577 /* reserve and fill IE */
578 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
579 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
580 }
581
582 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
583 {
584 struct ieee80211_local *local = sdata->local;
585 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
586 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
587 struct sk_buff *skb;
588 struct ieee80211_mgmt *mgmt;
589 u8 *pos, qos_info;
590 size_t offset = 0, noffset;
591 int i, count, rates_len, supp_rates_len, shift;
592 u16 capab;
593 struct ieee80211_supported_band *sband;
594 struct ieee80211_chanctx_conf *chanctx_conf;
595 struct ieee80211_channel *chan;
596 u32 rates = 0;
597
598 sdata_assert_lock(sdata);
599
600 rcu_read_lock();
601 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
602 if (WARN_ON(!chanctx_conf)) {
603 rcu_read_unlock();
604 return;
605 }
606 chan = chanctx_conf->def.chan;
607 rcu_read_unlock();
608 sband = local->hw.wiphy->bands[chan->band];
609 shift = ieee80211_vif_get_shift(&sdata->vif);
610
611 if (assoc_data->supp_rates_len) {
612 /*
613 * Get all rates supported by the device and the AP as
614 * some APs don't like getting a superset of their rates
615 * in the association request (e.g. D-Link DAP 1353 in
616 * b-only mode)...
617 */
618 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
619 assoc_data->supp_rates,
620 assoc_data->supp_rates_len,
621 &rates);
622 } else {
623 /*
624 * In case AP not provide any supported rates information
625 * before association, we send information element(s) with
626 * all rates that we support.
627 */
628 rates_len = 0;
629 for (i = 0; i < sband->n_bitrates; i++) {
630 rates |= BIT(i);
631 rates_len++;
632 }
633 }
634
635 skb = alloc_skb(local->hw.extra_tx_headroom +
636 sizeof(*mgmt) + /* bit too much but doesn't matter */
637 2 + assoc_data->ssid_len + /* SSID */
638 4 + rates_len + /* (extended) rates */
639 4 + /* power capability */
640 2 + 2 * sband->n_channels + /* supported channels */
641 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
642 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
643 assoc_data->ie_len + /* extra IEs */
644 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
645 9, /* WMM */
646 GFP_KERNEL);
647 if (!skb)
648 return;
649
650 skb_reserve(skb, local->hw.extra_tx_headroom);
651
652 capab = WLAN_CAPABILITY_ESS;
653
654 if (sband->band == NL80211_BAND_2GHZ) {
655 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
656 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
657 }
658
659 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
660 capab |= WLAN_CAPABILITY_PRIVACY;
661
662 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
663 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
664 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
665
666 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
667 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
668
669 mgmt = skb_put_zero(skb, 24);
670 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
671 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
672 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
673
674 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
675 skb_put(skb, 10);
676 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
677 IEEE80211_STYPE_REASSOC_REQ);
678 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
679 mgmt->u.reassoc_req.listen_interval =
680 cpu_to_le16(local->hw.conf.listen_interval);
681 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
682 ETH_ALEN);
683 } else {
684 skb_put(skb, 4);
685 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
686 IEEE80211_STYPE_ASSOC_REQ);
687 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
688 mgmt->u.assoc_req.listen_interval =
689 cpu_to_le16(local->hw.conf.listen_interval);
690 }
691
692 /* SSID */
693 pos = skb_put(skb, 2 + assoc_data->ssid_len);
694 *pos++ = WLAN_EID_SSID;
695 *pos++ = assoc_data->ssid_len;
696 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
697
698 /* add all rates which were marked to be used above */
699 supp_rates_len = rates_len;
700 if (supp_rates_len > 8)
701 supp_rates_len = 8;
702
703 pos = skb_put(skb, supp_rates_len + 2);
704 *pos++ = WLAN_EID_SUPP_RATES;
705 *pos++ = supp_rates_len;
706
707 count = 0;
708 for (i = 0; i < sband->n_bitrates; i++) {
709 if (BIT(i) & rates) {
710 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
711 5 * (1 << shift));
712 *pos++ = (u8) rate;
713 if (++count == 8)
714 break;
715 }
716 }
717
718 if (rates_len > count) {
719 pos = skb_put(skb, rates_len - count + 2);
720 *pos++ = WLAN_EID_EXT_SUPP_RATES;
721 *pos++ = rates_len - count;
722
723 for (i++; i < sband->n_bitrates; i++) {
724 if (BIT(i) & rates) {
725 int rate;
726 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
727 5 * (1 << shift));
728 *pos++ = (u8) rate;
729 }
730 }
731 }
732
733 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
734 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
735 pos = skb_put(skb, 4);
736 *pos++ = WLAN_EID_PWR_CAPABILITY;
737 *pos++ = 2;
738 *pos++ = 0; /* min tx power */
739 /* max tx power */
740 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
741 }
742
743 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
744 /* TODO: get this in reg domain format */
745 pos = skb_put(skb, 2 * sband->n_channels + 2);
746 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
747 *pos++ = 2 * sband->n_channels;
748 for (i = 0; i < sband->n_channels; i++) {
749 *pos++ = ieee80211_frequency_to_channel(
750 sband->channels[i].center_freq);
751 *pos++ = 1; /* one channel in the subband*/
752 }
753 }
754
755 /* if present, add any custom IEs that go before HT */
756 if (assoc_data->ie_len) {
757 static const u8 before_ht[] = {
758 WLAN_EID_SSID,
759 WLAN_EID_SUPP_RATES,
760 WLAN_EID_EXT_SUPP_RATES,
761 WLAN_EID_PWR_CAPABILITY,
762 WLAN_EID_SUPPORTED_CHANNELS,
763 WLAN_EID_RSN,
764 WLAN_EID_QOS_CAPA,
765 WLAN_EID_RRM_ENABLED_CAPABILITIES,
766 WLAN_EID_MOBILITY_DOMAIN,
767 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
768 WLAN_EID_RIC_DATA, /* reassoc only */
769 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
770 };
771 static const u8 after_ric[] = {
772 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
773 WLAN_EID_HT_CAPABILITY,
774 WLAN_EID_BSS_COEX_2040,
775 /* luckily this is almost always there */
776 WLAN_EID_EXT_CAPABILITY,
777 WLAN_EID_QOS_TRAFFIC_CAPA,
778 WLAN_EID_TIM_BCAST_REQ,
779 WLAN_EID_INTERWORKING,
780 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
781 WLAN_EID_VHT_CAPABILITY,
782 WLAN_EID_OPMODE_NOTIF,
783 };
784
785 noffset = ieee80211_ie_split_ric(assoc_data->ie,
786 assoc_data->ie_len,
787 before_ht,
788 ARRAY_SIZE(before_ht),
789 after_ric,
790 ARRAY_SIZE(after_ric),
791 offset);
792 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
793 offset = noffset;
794 }
795
796 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
797 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
798 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
799
800 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
801 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
802 sband, chan, sdata->smps_mode);
803
804 /* if present, add any custom IEs that go before VHT */
805 if (assoc_data->ie_len) {
806 static const u8 before_vht[] = {
807 /*
808 * no need to list the ones split off before HT
809 * or generated here
810 */
811 WLAN_EID_BSS_COEX_2040,
812 WLAN_EID_EXT_CAPABILITY,
813 WLAN_EID_QOS_TRAFFIC_CAPA,
814 WLAN_EID_TIM_BCAST_REQ,
815 WLAN_EID_INTERWORKING,
816 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
817 };
818
819 /* RIC already taken above, so no need to handle here anymore */
820 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
821 before_vht, ARRAY_SIZE(before_vht),
822 offset);
823 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
824 offset = noffset;
825 }
826
827 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
828 ieee80211_add_vht_ie(sdata, skb, sband,
829 &assoc_data->ap_vht_cap);
830
831 /* if present, add any custom non-vendor IEs that go after HT */
832 if (assoc_data->ie_len) {
833 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
834 assoc_data->ie_len,
835 offset);
836 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
837 offset = noffset;
838 }
839
840 if (assoc_data->wmm) {
841 if (assoc_data->uapsd) {
842 qos_info = ifmgd->uapsd_queues;
843 qos_info |= (ifmgd->uapsd_max_sp_len <<
844 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
845 } else {
846 qos_info = 0;
847 }
848
849 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
850 }
851
852 /* add any remaining custom (i.e. vendor specific here) IEs */
853 if (assoc_data->ie_len) {
854 noffset = assoc_data->ie_len;
855 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
856 }
857
858 if (assoc_data->fils_kek_len &&
859 fils_encrypt_assoc_req(skb, assoc_data) < 0) {
860 dev_kfree_skb(skb);
861 return;
862 }
863
864 drv_mgd_prepare_tx(local, sdata);
865
866 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
867 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
868 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
869 IEEE80211_TX_INTFL_MLME_CONN_TX;
870 ieee80211_tx_skb(sdata, skb);
871 }
872
873 void ieee80211_send_pspoll(struct ieee80211_local *local,
874 struct ieee80211_sub_if_data *sdata)
875 {
876 struct ieee80211_pspoll *pspoll;
877 struct sk_buff *skb;
878
879 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
880 if (!skb)
881 return;
882
883 pspoll = (struct ieee80211_pspoll *) skb->data;
884 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
885
886 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
887 ieee80211_tx_skb(sdata, skb);
888 }
889
890 void ieee80211_send_nullfunc(struct ieee80211_local *local,
891 struct ieee80211_sub_if_data *sdata,
892 bool powersave)
893 {
894 struct sk_buff *skb;
895 struct ieee80211_hdr_3addr *nullfunc;
896 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
897
898 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
899 if (!skb)
900 return;
901
902 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
903 if (powersave)
904 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
905
906 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
907 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
908
909 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
910 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
911
912 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
913 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
914
915 ieee80211_tx_skb(sdata, skb);
916 }
917
918 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
919 struct ieee80211_sub_if_data *sdata)
920 {
921 struct sk_buff *skb;
922 struct ieee80211_hdr *nullfunc;
923 __le16 fc;
924
925 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
926 return;
927
928 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
929 if (!skb)
930 return;
931
932 skb_reserve(skb, local->hw.extra_tx_headroom);
933
934 nullfunc = skb_put_zero(skb, 30);
935 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
936 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
937 nullfunc->frame_control = fc;
938 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
939 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
940 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
941 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
942
943 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
944 ieee80211_tx_skb(sdata, skb);
945 }
946
947 /* spectrum management related things */
948 static void ieee80211_chswitch_work(struct work_struct *work)
949 {
950 struct ieee80211_sub_if_data *sdata =
951 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
952 struct ieee80211_local *local = sdata->local;
953 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
954 int ret;
955
956 if (!ieee80211_sdata_running(sdata))
957 return;
958
959 sdata_lock(sdata);
960 mutex_lock(&local->mtx);
961 mutex_lock(&local->chanctx_mtx);
962
963 if (!ifmgd->associated)
964 goto out;
965
966 if (!sdata->vif.csa_active)
967 goto out;
968
969 /*
970 * using reservation isn't immediate as it may be deferred until later
971 * with multi-vif. once reservation is complete it will re-schedule the
972 * work with no reserved_chanctx so verify chandef to check if it
973 * completed successfully
974 */
975
976 if (sdata->reserved_chanctx) {
977 /*
978 * with multi-vif csa driver may call ieee80211_csa_finish()
979 * many times while waiting for other interfaces to use their
980 * reservations
981 */
982 if (sdata->reserved_ready)
983 goto out;
984
985 ret = ieee80211_vif_use_reserved_context(sdata);
986 if (ret) {
987 sdata_info(sdata,
988 "failed to use reserved channel context, disconnecting (err=%d)\n",
989 ret);
990 ieee80211_queue_work(&sdata->local->hw,
991 &ifmgd->csa_connection_drop_work);
992 goto out;
993 }
994
995 goto out;
996 }
997
998 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
999 &sdata->csa_chandef)) {
1000 sdata_info(sdata,
1001 "failed to finalize channel switch, disconnecting\n");
1002 ieee80211_queue_work(&sdata->local->hw,
1003 &ifmgd->csa_connection_drop_work);
1004 goto out;
1005 }
1006
1007 /* XXX: shouldn't really modify cfg80211-owned data! */
1008 ifmgd->associated->channel = sdata->csa_chandef.chan;
1009
1010 ifmgd->csa_waiting_bcn = true;
1011
1012 ieee80211_sta_reset_beacon_monitor(sdata);
1013 ieee80211_sta_reset_conn_monitor(sdata);
1014
1015 out:
1016 mutex_unlock(&local->chanctx_mtx);
1017 mutex_unlock(&local->mtx);
1018 sdata_unlock(sdata);
1019 }
1020
1021 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1022 {
1023 struct ieee80211_local *local = sdata->local;
1024 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1025 int ret;
1026
1027 sdata_assert_lock(sdata);
1028
1029 WARN_ON(!sdata->vif.csa_active);
1030
1031 if (sdata->csa_block_tx) {
1032 ieee80211_wake_vif_queues(local, sdata,
1033 IEEE80211_QUEUE_STOP_REASON_CSA);
1034 sdata->csa_block_tx = false;
1035 }
1036
1037 sdata->vif.csa_active = false;
1038 ifmgd->csa_waiting_bcn = false;
1039
1040 ret = drv_post_channel_switch(sdata);
1041 if (ret) {
1042 sdata_info(sdata,
1043 "driver post channel switch failed, disconnecting\n");
1044 ieee80211_queue_work(&local->hw,
1045 &ifmgd->csa_connection_drop_work);
1046 return;
1047 }
1048
1049 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1050 }
1051
1052 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1053 {
1054 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1055 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1056
1057 trace_api_chswitch_done(sdata, success);
1058 if (!success) {
1059 sdata_info(sdata,
1060 "driver channel switch failed, disconnecting\n");
1061 ieee80211_queue_work(&sdata->local->hw,
1062 &ifmgd->csa_connection_drop_work);
1063 } else {
1064 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1065 }
1066 }
1067 EXPORT_SYMBOL(ieee80211_chswitch_done);
1068
1069 static void ieee80211_chswitch_timer(struct timer_list *t)
1070 {
1071 struct ieee80211_sub_if_data *sdata =
1072 from_timer(sdata, t, u.mgd.chswitch_timer);
1073
1074 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1075 }
1076
1077 static void
1078 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1079 u64 timestamp, u32 device_timestamp,
1080 struct ieee802_11_elems *elems,
1081 bool beacon)
1082 {
1083 struct ieee80211_local *local = sdata->local;
1084 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1085 struct cfg80211_bss *cbss = ifmgd->associated;
1086 struct ieee80211_chanctx_conf *conf;
1087 struct ieee80211_chanctx *chanctx;
1088 enum nl80211_band current_band;
1089 struct ieee80211_csa_ie csa_ie;
1090 struct ieee80211_channel_switch ch_switch;
1091 int res;
1092
1093 sdata_assert_lock(sdata);
1094
1095 if (!cbss)
1096 return;
1097
1098 if (local->scanning)
1099 return;
1100
1101 /* disregard subsequent announcements if we are already processing */
1102 if (sdata->vif.csa_active)
1103 return;
1104
1105 current_band = cbss->channel->band;
1106 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1107 ifmgd->flags,
1108 ifmgd->associated->bssid, &csa_ie);
1109 if (res < 0)
1110 ieee80211_queue_work(&local->hw,
1111 &ifmgd->csa_connection_drop_work);
1112 if (res)
1113 return;
1114
1115 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1116 IEEE80211_CHAN_DISABLED)) {
1117 sdata_info(sdata,
1118 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1119 ifmgd->associated->bssid,
1120 csa_ie.chandef.chan->center_freq,
1121 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1122 csa_ie.chandef.center_freq2);
1123 ieee80211_queue_work(&local->hw,
1124 &ifmgd->csa_connection_drop_work);
1125 return;
1126 }
1127
1128 if (cfg80211_chandef_identical(&csa_ie.chandef,
1129 &sdata->vif.bss_conf.chandef)) {
1130 if (ifmgd->csa_ignored_same_chan)
1131 return;
1132 sdata_info(sdata,
1133 "AP %pM tries to chanswitch to same channel, ignore\n",
1134 ifmgd->associated->bssid);
1135 ifmgd->csa_ignored_same_chan = true;
1136 return;
1137 }
1138
1139 /*
1140 * Drop all TDLS peers - either we disconnect or move to a different
1141 * channel from this point on. There's no telling what our peer will do.
1142 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1143 * have an incompatible wider chandef.
1144 */
1145 ieee80211_teardown_tdls_peers(sdata);
1146
1147 mutex_lock(&local->mtx);
1148 mutex_lock(&local->chanctx_mtx);
1149 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1150 lockdep_is_held(&local->chanctx_mtx));
1151 if (!conf) {
1152 sdata_info(sdata,
1153 "no channel context assigned to vif?, disconnecting\n");
1154 goto drop_connection;
1155 }
1156
1157 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1158
1159 if (local->use_chanctx &&
1160 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1161 sdata_info(sdata,
1162 "driver doesn't support chan-switch with channel contexts\n");
1163 goto drop_connection;
1164 }
1165
1166 ch_switch.timestamp = timestamp;
1167 ch_switch.device_timestamp = device_timestamp;
1168 ch_switch.block_tx = csa_ie.mode;
1169 ch_switch.chandef = csa_ie.chandef;
1170 ch_switch.count = csa_ie.count;
1171
1172 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1173 sdata_info(sdata,
1174 "preparing for channel switch failed, disconnecting\n");
1175 goto drop_connection;
1176 }
1177
1178 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1179 chanctx->mode, false);
1180 if (res) {
1181 sdata_info(sdata,
1182 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1183 res);
1184 goto drop_connection;
1185 }
1186 mutex_unlock(&local->chanctx_mtx);
1187
1188 sdata->vif.csa_active = true;
1189 sdata->csa_chandef = csa_ie.chandef;
1190 sdata->csa_block_tx = csa_ie.mode;
1191 ifmgd->csa_ignored_same_chan = false;
1192
1193 if (sdata->csa_block_tx)
1194 ieee80211_stop_vif_queues(local, sdata,
1195 IEEE80211_QUEUE_STOP_REASON_CSA);
1196 mutex_unlock(&local->mtx);
1197
1198 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1199 csa_ie.count);
1200
1201 if (local->ops->channel_switch) {
1202 /* use driver's channel switch callback */
1203 drv_channel_switch(local, sdata, &ch_switch);
1204 return;
1205 }
1206
1207 /* channel switch handled in software */
1208 if (csa_ie.count <= 1)
1209 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1210 else
1211 mod_timer(&ifmgd->chswitch_timer,
1212 TU_TO_EXP_TIME((csa_ie.count - 1) *
1213 cbss->beacon_interval));
1214 return;
1215 drop_connection:
1216 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1217 mutex_unlock(&local->chanctx_mtx);
1218 mutex_unlock(&local->mtx);
1219 }
1220
1221 static bool
1222 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1223 struct ieee80211_channel *channel,
1224 const u8 *country_ie, u8 country_ie_len,
1225 const u8 *pwr_constr_elem,
1226 int *chan_pwr, int *pwr_reduction)
1227 {
1228 struct ieee80211_country_ie_triplet *triplet;
1229 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1230 int i, chan_increment;
1231 bool have_chan_pwr = false;
1232
1233 /* Invalid IE */
1234 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1235 return false;
1236
1237 triplet = (void *)(country_ie + 3);
1238 country_ie_len -= 3;
1239
1240 switch (channel->band) {
1241 default:
1242 WARN_ON_ONCE(1);
1243 /* fall through */
1244 case NL80211_BAND_2GHZ:
1245 case NL80211_BAND_60GHZ:
1246 chan_increment = 1;
1247 break;
1248 case NL80211_BAND_5GHZ:
1249 chan_increment = 4;
1250 break;
1251 }
1252
1253 /* find channel */
1254 while (country_ie_len >= 3) {
1255 u8 first_channel = triplet->chans.first_channel;
1256
1257 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1258 goto next;
1259
1260 for (i = 0; i < triplet->chans.num_channels; i++) {
1261 if (first_channel + i * chan_increment == chan) {
1262 have_chan_pwr = true;
1263 *chan_pwr = triplet->chans.max_power;
1264 break;
1265 }
1266 }
1267 if (have_chan_pwr)
1268 break;
1269
1270 next:
1271 triplet++;
1272 country_ie_len -= 3;
1273 }
1274
1275 if (have_chan_pwr && pwr_constr_elem)
1276 *pwr_reduction = *pwr_constr_elem;
1277 else
1278 *pwr_reduction = 0;
1279
1280 return have_chan_pwr;
1281 }
1282
1283 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1284 struct ieee80211_channel *channel,
1285 const u8 *cisco_dtpc_ie,
1286 int *pwr_level)
1287 {
1288 /* From practical testing, the first data byte of the DTPC element
1289 * seems to contain the requested dBm level, and the CLI on Cisco
1290 * APs clearly state the range is -127 to 127 dBm, which indicates
1291 * a signed byte, although it seemingly never actually goes negative.
1292 * The other byte seems to always be zero.
1293 */
1294 *pwr_level = (__s8)cisco_dtpc_ie[4];
1295 }
1296
1297 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1298 struct ieee80211_channel *channel,
1299 struct ieee80211_mgmt *mgmt,
1300 const u8 *country_ie, u8 country_ie_len,
1301 const u8 *pwr_constr_ie,
1302 const u8 *cisco_dtpc_ie)
1303 {
1304 bool has_80211h_pwr = false, has_cisco_pwr = false;
1305 int chan_pwr = 0, pwr_reduction_80211h = 0;
1306 int pwr_level_cisco, pwr_level_80211h;
1307 int new_ap_level;
1308 __le16 capab = mgmt->u.probe_resp.capab_info;
1309
1310 if (country_ie &&
1311 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1312 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1313 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1314 sdata, channel, country_ie, country_ie_len,
1315 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1316 pwr_level_80211h =
1317 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1318 }
1319
1320 if (cisco_dtpc_ie) {
1321 ieee80211_find_cisco_dtpc(
1322 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1323 has_cisco_pwr = true;
1324 }
1325
1326 if (!has_80211h_pwr && !has_cisco_pwr)
1327 return 0;
1328
1329 /* If we have both 802.11h and Cisco DTPC, apply both limits
1330 * by picking the smallest of the two power levels advertised.
1331 */
1332 if (has_80211h_pwr &&
1333 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1334 new_ap_level = pwr_level_80211h;
1335
1336 if (sdata->ap_power_level == new_ap_level)
1337 return 0;
1338
1339 sdata_dbg(sdata,
1340 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1341 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1342 sdata->u.mgd.bssid);
1343 } else { /* has_cisco_pwr is always true here. */
1344 new_ap_level = pwr_level_cisco;
1345
1346 if (sdata->ap_power_level == new_ap_level)
1347 return 0;
1348
1349 sdata_dbg(sdata,
1350 "Limiting TX power to %d dBm as advertised by %pM\n",
1351 pwr_level_cisco, sdata->u.mgd.bssid);
1352 }
1353
1354 sdata->ap_power_level = new_ap_level;
1355 if (__ieee80211_recalc_txpower(sdata))
1356 return BSS_CHANGED_TXPOWER;
1357 return 0;
1358 }
1359
1360 /* powersave */
1361 static void ieee80211_enable_ps(struct ieee80211_local *local,
1362 struct ieee80211_sub_if_data *sdata)
1363 {
1364 struct ieee80211_conf *conf = &local->hw.conf;
1365
1366 /*
1367 * If we are scanning right now then the parameters will
1368 * take effect when scan finishes.
1369 */
1370 if (local->scanning)
1371 return;
1372
1373 if (conf->dynamic_ps_timeout > 0 &&
1374 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1375 mod_timer(&local->dynamic_ps_timer, jiffies +
1376 msecs_to_jiffies(conf->dynamic_ps_timeout));
1377 } else {
1378 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1379 ieee80211_send_nullfunc(local, sdata, true);
1380
1381 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1382 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1383 return;
1384
1385 conf->flags |= IEEE80211_CONF_PS;
1386 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1387 }
1388 }
1389
1390 static void ieee80211_change_ps(struct ieee80211_local *local)
1391 {
1392 struct ieee80211_conf *conf = &local->hw.conf;
1393
1394 if (local->ps_sdata) {
1395 ieee80211_enable_ps(local, local->ps_sdata);
1396 } else if (conf->flags & IEEE80211_CONF_PS) {
1397 conf->flags &= ~IEEE80211_CONF_PS;
1398 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1399 del_timer_sync(&local->dynamic_ps_timer);
1400 cancel_work_sync(&local->dynamic_ps_enable_work);
1401 }
1402 }
1403
1404 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1405 {
1406 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1407 struct sta_info *sta = NULL;
1408 bool authorized = false;
1409
1410 if (!mgd->powersave)
1411 return false;
1412
1413 if (mgd->broken_ap)
1414 return false;
1415
1416 if (!mgd->associated)
1417 return false;
1418
1419 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1420 return false;
1421
1422 if (!mgd->have_beacon)
1423 return false;
1424
1425 rcu_read_lock();
1426 sta = sta_info_get(sdata, mgd->bssid);
1427 if (sta)
1428 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1429 rcu_read_unlock();
1430
1431 return authorized;
1432 }
1433
1434 /* need to hold RTNL or interface lock */
1435 void ieee80211_recalc_ps(struct ieee80211_local *local)
1436 {
1437 struct ieee80211_sub_if_data *sdata, *found = NULL;
1438 int count = 0;
1439 int timeout;
1440
1441 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1442 local->ps_sdata = NULL;
1443 return;
1444 }
1445
1446 list_for_each_entry(sdata, &local->interfaces, list) {
1447 if (!ieee80211_sdata_running(sdata))
1448 continue;
1449 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1450 /* If an AP vif is found, then disable PS
1451 * by setting the count to zero thereby setting
1452 * ps_sdata to NULL.
1453 */
1454 count = 0;
1455 break;
1456 }
1457 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1458 continue;
1459 found = sdata;
1460 count++;
1461 }
1462
1463 if (count == 1 && ieee80211_powersave_allowed(found)) {
1464 u8 dtimper = found->u.mgd.dtim_period;
1465
1466 timeout = local->dynamic_ps_forced_timeout;
1467 if (timeout < 0)
1468 timeout = 100;
1469 local->hw.conf.dynamic_ps_timeout = timeout;
1470
1471 /* If the TIM IE is invalid, pretend the value is 1 */
1472 if (!dtimper)
1473 dtimper = 1;
1474
1475 local->hw.conf.ps_dtim_period = dtimper;
1476 local->ps_sdata = found;
1477 } else {
1478 local->ps_sdata = NULL;
1479 }
1480
1481 ieee80211_change_ps(local);
1482 }
1483
1484 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1485 {
1486 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1487
1488 if (sdata->vif.bss_conf.ps != ps_allowed) {
1489 sdata->vif.bss_conf.ps = ps_allowed;
1490 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1491 }
1492 }
1493
1494 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1495 {
1496 struct ieee80211_local *local =
1497 container_of(work, struct ieee80211_local,
1498 dynamic_ps_disable_work);
1499
1500 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1501 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1502 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1503 }
1504
1505 ieee80211_wake_queues_by_reason(&local->hw,
1506 IEEE80211_MAX_QUEUE_MAP,
1507 IEEE80211_QUEUE_STOP_REASON_PS,
1508 false);
1509 }
1510
1511 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1512 {
1513 struct ieee80211_local *local =
1514 container_of(work, struct ieee80211_local,
1515 dynamic_ps_enable_work);
1516 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1517 struct ieee80211_if_managed *ifmgd;
1518 unsigned long flags;
1519 int q;
1520
1521 /* can only happen when PS was just disabled anyway */
1522 if (!sdata)
1523 return;
1524
1525 ifmgd = &sdata->u.mgd;
1526
1527 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1528 return;
1529
1530 if (local->hw.conf.dynamic_ps_timeout > 0) {
1531 /* don't enter PS if TX frames are pending */
1532 if (drv_tx_frames_pending(local)) {
1533 mod_timer(&local->dynamic_ps_timer, jiffies +
1534 msecs_to_jiffies(
1535 local->hw.conf.dynamic_ps_timeout));
1536 return;
1537 }
1538
1539 /*
1540 * transmission can be stopped by others which leads to
1541 * dynamic_ps_timer expiry. Postpone the ps timer if it
1542 * is not the actual idle state.
1543 */
1544 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1545 for (q = 0; q < local->hw.queues; q++) {
1546 if (local->queue_stop_reasons[q]) {
1547 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1548 flags);
1549 mod_timer(&local->dynamic_ps_timer, jiffies +
1550 msecs_to_jiffies(
1551 local->hw.conf.dynamic_ps_timeout));
1552 return;
1553 }
1554 }
1555 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1556 }
1557
1558 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1559 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1560 if (drv_tx_frames_pending(local)) {
1561 mod_timer(&local->dynamic_ps_timer, jiffies +
1562 msecs_to_jiffies(
1563 local->hw.conf.dynamic_ps_timeout));
1564 } else {
1565 ieee80211_send_nullfunc(local, sdata, true);
1566 /* Flush to get the tx status of nullfunc frame */
1567 ieee80211_flush_queues(local, sdata, false);
1568 }
1569 }
1570
1571 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1572 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1573 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1574 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1575 local->hw.conf.flags |= IEEE80211_CONF_PS;
1576 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1577 }
1578 }
1579
1580 void ieee80211_dynamic_ps_timer(struct timer_list *t)
1581 {
1582 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1583
1584 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1585 }
1586
1587 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1588 {
1589 struct delayed_work *delayed_work = to_delayed_work(work);
1590 struct ieee80211_sub_if_data *sdata =
1591 container_of(delayed_work, struct ieee80211_sub_if_data,
1592 dfs_cac_timer_work);
1593 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1594
1595 mutex_lock(&sdata->local->mtx);
1596 if (sdata->wdev.cac_started) {
1597 ieee80211_vif_release_channel(sdata);
1598 cfg80211_cac_event(sdata->dev, &chandef,
1599 NL80211_RADAR_CAC_FINISHED,
1600 GFP_KERNEL);
1601 }
1602 mutex_unlock(&sdata->local->mtx);
1603 }
1604
1605 static bool
1606 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1607 {
1608 struct ieee80211_local *local = sdata->local;
1609 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1610 bool ret = false;
1611 int ac;
1612
1613 if (local->hw.queues < IEEE80211_NUM_ACS)
1614 return false;
1615
1616 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1617 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1618 int non_acm_ac;
1619 unsigned long now = jiffies;
1620
1621 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1622 tx_tspec->admitted_time &&
1623 time_after(now, tx_tspec->time_slice_start + HZ)) {
1624 tx_tspec->consumed_tx_time = 0;
1625 tx_tspec->time_slice_start = now;
1626
1627 if (tx_tspec->downgraded)
1628 tx_tspec->action =
1629 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1630 }
1631
1632 switch (tx_tspec->action) {
1633 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1634 /* take the original parameters */
1635 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1636 sdata_err(sdata,
1637 "failed to set TX queue parameters for queue %d\n",
1638 ac);
1639 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1640 tx_tspec->downgraded = false;
1641 ret = true;
1642 break;
1643 case TX_TSPEC_ACTION_DOWNGRADE:
1644 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1645 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1646 ret = true;
1647 break;
1648 }
1649 /* downgrade next lower non-ACM AC */
1650 for (non_acm_ac = ac + 1;
1651 non_acm_ac < IEEE80211_NUM_ACS;
1652 non_acm_ac++)
1653 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1654 break;
1655 /* Usually the loop will result in using BK even if it
1656 * requires admission control, but such a configuration
1657 * makes no sense and we have to transmit somehow - the
1658 * AC selection does the same thing.
1659 * If we started out trying to downgrade from BK, then
1660 * the extra condition here might be needed.
1661 */
1662 if (non_acm_ac >= IEEE80211_NUM_ACS)
1663 non_acm_ac = IEEE80211_AC_BK;
1664 if (drv_conf_tx(local, sdata, ac,
1665 &sdata->tx_conf[non_acm_ac]))
1666 sdata_err(sdata,
1667 "failed to set TX queue parameters for queue %d\n",
1668 ac);
1669 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1670 ret = true;
1671 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1672 tx_tspec->time_slice_start + HZ - now + 1);
1673 break;
1674 case TX_TSPEC_ACTION_NONE:
1675 /* nothing now */
1676 break;
1677 }
1678 }
1679
1680 return ret;
1681 }
1682
1683 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1684 {
1685 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1686 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1687 }
1688
1689 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1690 {
1691 struct ieee80211_sub_if_data *sdata;
1692
1693 sdata = container_of(work, struct ieee80211_sub_if_data,
1694 u.mgd.tx_tspec_wk.work);
1695 ieee80211_sta_handle_tspec_ac_params(sdata);
1696 }
1697
1698 /* MLME */
1699 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1700 struct ieee80211_sub_if_data *sdata,
1701 const u8 *wmm_param, size_t wmm_param_len)
1702 {
1703 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1704 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1705 size_t left;
1706 int count, ac;
1707 const u8 *pos;
1708 u8 uapsd_queues = 0;
1709
1710 if (!local->ops->conf_tx)
1711 return false;
1712
1713 if (local->hw.queues < IEEE80211_NUM_ACS)
1714 return false;
1715
1716 if (!wmm_param)
1717 return false;
1718
1719 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1720 return false;
1721
1722 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1723 uapsd_queues = ifmgd->uapsd_queues;
1724
1725 count = wmm_param[6] & 0x0f;
1726 if (count == ifmgd->wmm_last_param_set)
1727 return false;
1728 ifmgd->wmm_last_param_set = count;
1729
1730 pos = wmm_param + 8;
1731 left = wmm_param_len - 8;
1732
1733 memset(&params, 0, sizeof(params));
1734
1735 sdata->wmm_acm = 0;
1736 for (; left >= 4; left -= 4, pos += 4) {
1737 int aci = (pos[0] >> 5) & 0x03;
1738 int acm = (pos[0] >> 4) & 0x01;
1739 bool uapsd = false;
1740
1741 switch (aci) {
1742 case 1: /* AC_BK */
1743 ac = IEEE80211_AC_BK;
1744 if (acm)
1745 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1746 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1747 uapsd = true;
1748 break;
1749 case 2: /* AC_VI */
1750 ac = IEEE80211_AC_VI;
1751 if (acm)
1752 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1753 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1754 uapsd = true;
1755 break;
1756 case 3: /* AC_VO */
1757 ac = IEEE80211_AC_VO;
1758 if (acm)
1759 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1760 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1761 uapsd = true;
1762 break;
1763 case 0: /* AC_BE */
1764 default:
1765 ac = IEEE80211_AC_BE;
1766 if (acm)
1767 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1768 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1769 uapsd = true;
1770 break;
1771 }
1772
1773 params[ac].aifs = pos[0] & 0x0f;
1774
1775 if (params[ac].aifs < 2) {
1776 sdata_info(sdata,
1777 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1778 params[ac].aifs, aci);
1779 params[ac].aifs = 2;
1780 }
1781 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1782 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1783 params[ac].txop = get_unaligned_le16(pos + 2);
1784 params[ac].acm = acm;
1785 params[ac].uapsd = uapsd;
1786
1787 if (params[ac].cw_min > params[ac].cw_max) {
1788 sdata_info(sdata,
1789 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1790 params[ac].cw_min, params[ac].cw_max, aci);
1791 return false;
1792 }
1793 }
1794
1795 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1796 mlme_dbg(sdata,
1797 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1798 ac, params[ac].acm,
1799 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1800 params[ac].txop, params[ac].uapsd,
1801 ifmgd->tx_tspec[ac].downgraded);
1802 sdata->tx_conf[ac] = params[ac];
1803 if (!ifmgd->tx_tspec[ac].downgraded &&
1804 drv_conf_tx(local, sdata, ac, &params[ac]))
1805 sdata_err(sdata,
1806 "failed to set TX queue parameters for AC %d\n",
1807 ac);
1808 }
1809
1810 /* enable WMM or activate new settings */
1811 sdata->vif.bss_conf.qos = true;
1812 return true;
1813 }
1814
1815 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1816 {
1817 lockdep_assert_held(&sdata->local->mtx);
1818
1819 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1820 ieee80211_run_deferred_scan(sdata->local);
1821 }
1822
1823 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1824 {
1825 mutex_lock(&sdata->local->mtx);
1826 __ieee80211_stop_poll(sdata);
1827 mutex_unlock(&sdata->local->mtx);
1828 }
1829
1830 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1831 u16 capab, bool erp_valid, u8 erp)
1832 {
1833 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1834 struct ieee80211_supported_band *sband;
1835 u32 changed = 0;
1836 bool use_protection;
1837 bool use_short_preamble;
1838 bool use_short_slot;
1839
1840 sband = ieee80211_get_sband(sdata);
1841 if (!sband)
1842 return changed;
1843
1844 if (erp_valid) {
1845 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1846 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1847 } else {
1848 use_protection = false;
1849 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1850 }
1851
1852 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1853 if (sband->band == NL80211_BAND_5GHZ)
1854 use_short_slot = true;
1855
1856 if (use_protection != bss_conf->use_cts_prot) {
1857 bss_conf->use_cts_prot = use_protection;
1858 changed |= BSS_CHANGED_ERP_CTS_PROT;
1859 }
1860
1861 if (use_short_preamble != bss_conf->use_short_preamble) {
1862 bss_conf->use_short_preamble = use_short_preamble;
1863 changed |= BSS_CHANGED_ERP_PREAMBLE;
1864 }
1865
1866 if (use_short_slot != bss_conf->use_short_slot) {
1867 bss_conf->use_short_slot = use_short_slot;
1868 changed |= BSS_CHANGED_ERP_SLOT;
1869 }
1870
1871 return changed;
1872 }
1873
1874 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1875 struct cfg80211_bss *cbss,
1876 u32 bss_info_changed)
1877 {
1878 struct ieee80211_bss *bss = (void *)cbss->priv;
1879 struct ieee80211_local *local = sdata->local;
1880 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1881
1882 bss_info_changed |= BSS_CHANGED_ASSOC;
1883 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1884 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1885
1886 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1887 beacon_loss_count * bss_conf->beacon_int));
1888
1889 sdata->u.mgd.associated = cbss;
1890 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1891
1892 ieee80211_check_rate_mask(sdata);
1893
1894 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1895
1896 if (sdata->vif.p2p ||
1897 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
1898 const struct cfg80211_bss_ies *ies;
1899
1900 rcu_read_lock();
1901 ies = rcu_dereference(cbss->ies);
1902 if (ies) {
1903 int ret;
1904
1905 ret = cfg80211_get_p2p_attr(
1906 ies->data, ies->len,
1907 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1908 (u8 *) &bss_conf->p2p_noa_attr,
1909 sizeof(bss_conf->p2p_noa_attr));
1910 if (ret >= 2) {
1911 sdata->u.mgd.p2p_noa_index =
1912 bss_conf->p2p_noa_attr.index;
1913 bss_info_changed |= BSS_CHANGED_P2P_PS;
1914 }
1915 }
1916 rcu_read_unlock();
1917 }
1918
1919 /* just to be sure */
1920 ieee80211_stop_poll(sdata);
1921
1922 ieee80211_led_assoc(local, 1);
1923
1924 if (sdata->u.mgd.have_beacon) {
1925 /*
1926 * If the AP is buggy we may get here with no DTIM period
1927 * known, so assume it's 1 which is the only safe assumption
1928 * in that case, although if the TIM IE is broken powersave
1929 * probably just won't work at all.
1930 */
1931 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1932 bss_conf->beacon_rate = bss->beacon_rate;
1933 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1934 } else {
1935 bss_conf->beacon_rate = NULL;
1936 bss_conf->dtim_period = 0;
1937 }
1938
1939 bss_conf->assoc = 1;
1940
1941 /* Tell the driver to monitor connection quality (if supported) */
1942 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1943 bss_conf->cqm_rssi_thold)
1944 bss_info_changed |= BSS_CHANGED_CQM;
1945
1946 /* Enable ARP filtering */
1947 if (bss_conf->arp_addr_cnt)
1948 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1949
1950 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1951
1952 mutex_lock(&local->iflist_mtx);
1953 ieee80211_recalc_ps(local);
1954 mutex_unlock(&local->iflist_mtx);
1955
1956 ieee80211_recalc_smps(sdata);
1957 ieee80211_recalc_ps_vif(sdata);
1958
1959 netif_carrier_on(sdata->dev);
1960 }
1961
1962 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1963 u16 stype, u16 reason, bool tx,
1964 u8 *frame_buf)
1965 {
1966 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1967 struct ieee80211_local *local = sdata->local;
1968 u32 changed = 0;
1969
1970 sdata_assert_lock(sdata);
1971
1972 if (WARN_ON_ONCE(tx && !frame_buf))
1973 return;
1974
1975 if (WARN_ON(!ifmgd->associated))
1976 return;
1977
1978 ieee80211_stop_poll(sdata);
1979
1980 ifmgd->associated = NULL;
1981 netif_carrier_off(sdata->dev);
1982
1983 /*
1984 * if we want to get out of ps before disassoc (why?) we have
1985 * to do it before sending disassoc, as otherwise the null-packet
1986 * won't be valid.
1987 */
1988 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1989 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1990 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1991 }
1992 local->ps_sdata = NULL;
1993
1994 /* disable per-vif ps */
1995 ieee80211_recalc_ps_vif(sdata);
1996
1997 /* make sure ongoing transmission finishes */
1998 synchronize_net();
1999
2000 /*
2001 * drop any frame before deauth/disassoc, this can be data or
2002 * management frame. Since we are disconnecting, we should not
2003 * insist sending these frames which can take time and delay
2004 * the disconnection and possible the roaming.
2005 */
2006 if (tx)
2007 ieee80211_flush_queues(local, sdata, true);
2008
2009 /* deauthenticate/disassociate now */
2010 if (tx || frame_buf)
2011 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2012 reason, tx, frame_buf);
2013
2014 /* flush out frame - make sure the deauth was actually sent */
2015 if (tx)
2016 ieee80211_flush_queues(local, sdata, false);
2017
2018 /* clear bssid only after building the needed mgmt frames */
2019 eth_zero_addr(ifmgd->bssid);
2020
2021 /* remove AP and TDLS peers */
2022 sta_info_flush(sdata);
2023
2024 /* finally reset all BSS / config parameters */
2025 changed |= ieee80211_reset_erp_info(sdata);
2026
2027 ieee80211_led_assoc(local, 0);
2028 changed |= BSS_CHANGED_ASSOC;
2029 sdata->vif.bss_conf.assoc = false;
2030
2031 ifmgd->p2p_noa_index = -1;
2032 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2033 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2034
2035 /* on the next assoc, re-program HT/VHT parameters */
2036 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2037 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2038 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2039 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2040
2041 /* reset MU-MIMO ownership and group data */
2042 memset(sdata->vif.bss_conf.mu_group.membership, 0,
2043 sizeof(sdata->vif.bss_conf.mu_group.membership));
2044 memset(sdata->vif.bss_conf.mu_group.position, 0,
2045 sizeof(sdata->vif.bss_conf.mu_group.position));
2046 changed |= BSS_CHANGED_MU_GROUPS;
2047 sdata->vif.mu_mimo_owner = false;
2048
2049 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2050
2051 del_timer_sync(&local->dynamic_ps_timer);
2052 cancel_work_sync(&local->dynamic_ps_enable_work);
2053
2054 /* Disable ARP filtering */
2055 if (sdata->vif.bss_conf.arp_addr_cnt)
2056 changed |= BSS_CHANGED_ARP_FILTER;
2057
2058 sdata->vif.bss_conf.qos = false;
2059 changed |= BSS_CHANGED_QOS;
2060
2061 /* The BSSID (not really interesting) and HT changed */
2062 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2063 ieee80211_bss_info_change_notify(sdata, changed);
2064
2065 /* disassociated - set to defaults now */
2066 ieee80211_set_wmm_default(sdata, false, false);
2067
2068 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2069 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2070 del_timer_sync(&sdata->u.mgd.timer);
2071 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2072
2073 sdata->vif.bss_conf.dtim_period = 0;
2074 sdata->vif.bss_conf.beacon_rate = NULL;
2075
2076 ifmgd->have_beacon = false;
2077
2078 ifmgd->flags = 0;
2079 mutex_lock(&local->mtx);
2080 ieee80211_vif_release_channel(sdata);
2081
2082 sdata->vif.csa_active = false;
2083 ifmgd->csa_waiting_bcn = false;
2084 ifmgd->csa_ignored_same_chan = false;
2085 if (sdata->csa_block_tx) {
2086 ieee80211_wake_vif_queues(local, sdata,
2087 IEEE80211_QUEUE_STOP_REASON_CSA);
2088 sdata->csa_block_tx = false;
2089 }
2090 mutex_unlock(&local->mtx);
2091
2092 /* existing TX TSPEC sessions no longer exist */
2093 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2094 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2095
2096 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2097 }
2098
2099 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2100 struct ieee80211_hdr *hdr)
2101 {
2102 /*
2103 * We can postpone the mgd.timer whenever receiving unicast frames
2104 * from AP because we know that the connection is working both ways
2105 * at that time. But multicast frames (and hence also beacons) must
2106 * be ignored here, because we need to trigger the timer during
2107 * data idle periods for sending the periodic probe request to the
2108 * AP we're connected to.
2109 */
2110 if (is_multicast_ether_addr(hdr->addr1))
2111 return;
2112
2113 ieee80211_sta_reset_conn_monitor(sdata);
2114 }
2115
2116 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2117 {
2118 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2119 struct ieee80211_local *local = sdata->local;
2120
2121 mutex_lock(&local->mtx);
2122 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2123 goto out;
2124
2125 __ieee80211_stop_poll(sdata);
2126
2127 mutex_lock(&local->iflist_mtx);
2128 ieee80211_recalc_ps(local);
2129 mutex_unlock(&local->iflist_mtx);
2130
2131 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2132 goto out;
2133
2134 /*
2135 * We've received a probe response, but are not sure whether
2136 * we have or will be receiving any beacons or data, so let's
2137 * schedule the timers again, just in case.
2138 */
2139 ieee80211_sta_reset_beacon_monitor(sdata);
2140
2141 mod_timer(&ifmgd->conn_mon_timer,
2142 round_jiffies_up(jiffies +
2143 IEEE80211_CONNECTION_IDLE_TIME));
2144 out:
2145 mutex_unlock(&local->mtx);
2146 }
2147
2148 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2149 struct ieee80211_hdr *hdr,
2150 u16 tx_time)
2151 {
2152 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2153 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2154 int ac = ieee80211_ac_from_tid(tid);
2155 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2156 unsigned long now = jiffies;
2157
2158 if (likely(!tx_tspec->admitted_time))
2159 return;
2160
2161 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2162 tx_tspec->consumed_tx_time = 0;
2163 tx_tspec->time_slice_start = now;
2164
2165 if (tx_tspec->downgraded) {
2166 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2167 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2168 }
2169 }
2170
2171 if (tx_tspec->downgraded)
2172 return;
2173
2174 tx_tspec->consumed_tx_time += tx_time;
2175
2176 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2177 tx_tspec->downgraded = true;
2178 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2179 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2180 }
2181 }
2182
2183 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2184 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2185 {
2186 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2187
2188 if (!ieee80211_is_data(hdr->frame_control))
2189 return;
2190
2191 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2192 sdata->u.mgd.probe_send_count > 0) {
2193 if (ack)
2194 ieee80211_sta_reset_conn_monitor(sdata);
2195 else
2196 sdata->u.mgd.nullfunc_failed = true;
2197 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2198 return;
2199 }
2200
2201 if (ack)
2202 ieee80211_sta_reset_conn_monitor(sdata);
2203 }
2204
2205 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2206 {
2207 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2208 const u8 *ssid;
2209 u8 *dst = ifmgd->associated->bssid;
2210 u8 unicast_limit = max(1, max_probe_tries - 3);
2211 struct sta_info *sta;
2212
2213 /*
2214 * Try sending broadcast probe requests for the last three
2215 * probe requests after the first ones failed since some
2216 * buggy APs only support broadcast probe requests.
2217 */
2218 if (ifmgd->probe_send_count >= unicast_limit)
2219 dst = NULL;
2220
2221 /*
2222 * When the hardware reports an accurate Tx ACK status, it's
2223 * better to send a nullfunc frame instead of a probe request,
2224 * as it will kick us off the AP quickly if we aren't associated
2225 * anymore. The timeout will be reset if the frame is ACKed by
2226 * the AP.
2227 */
2228 ifmgd->probe_send_count++;
2229
2230 if (dst) {
2231 mutex_lock(&sdata->local->sta_mtx);
2232 sta = sta_info_get(sdata, dst);
2233 if (!WARN_ON(!sta))
2234 ieee80211_check_fast_rx(sta);
2235 mutex_unlock(&sdata->local->sta_mtx);
2236 }
2237
2238 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2239 ifmgd->nullfunc_failed = false;
2240 ieee80211_send_nullfunc(sdata->local, sdata, false);
2241 } else {
2242 int ssid_len;
2243
2244 rcu_read_lock();
2245 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2246 if (WARN_ON_ONCE(ssid == NULL))
2247 ssid_len = 0;
2248 else
2249 ssid_len = ssid[1];
2250
2251 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2252 ssid + 2, ssid_len, NULL,
2253 0, (u32) -1, true, 0,
2254 ifmgd->associated->channel, false);
2255 rcu_read_unlock();
2256 }
2257
2258 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2259 run_again(sdata, ifmgd->probe_timeout);
2260 }
2261
2262 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2263 bool beacon)
2264 {
2265 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2266 bool already = false;
2267
2268 if (!ieee80211_sdata_running(sdata))
2269 return;
2270
2271 sdata_lock(sdata);
2272
2273 if (!ifmgd->associated)
2274 goto out;
2275
2276 mutex_lock(&sdata->local->mtx);
2277
2278 if (sdata->local->tmp_channel || sdata->local->scanning) {
2279 mutex_unlock(&sdata->local->mtx);
2280 goto out;
2281 }
2282
2283 if (beacon) {
2284 mlme_dbg_ratelimited(sdata,
2285 "detected beacon loss from AP (missed %d beacons) - probing\n",
2286 beacon_loss_count);
2287
2288 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2289 }
2290
2291 /*
2292 * The driver/our work has already reported this event or the
2293 * connection monitoring has kicked in and we have already sent
2294 * a probe request. Or maybe the AP died and the driver keeps
2295 * reporting until we disassociate...
2296 *
2297 * In either case we have to ignore the current call to this
2298 * function (except for setting the correct probe reason bit)
2299 * because otherwise we would reset the timer every time and
2300 * never check whether we received a probe response!
2301 */
2302 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2303 already = true;
2304
2305 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2306
2307 mutex_unlock(&sdata->local->mtx);
2308
2309 if (already)
2310 goto out;
2311
2312 mutex_lock(&sdata->local->iflist_mtx);
2313 ieee80211_recalc_ps(sdata->local);
2314 mutex_unlock(&sdata->local->iflist_mtx);
2315
2316 ifmgd->probe_send_count = 0;
2317 ieee80211_mgd_probe_ap_send(sdata);
2318 out:
2319 sdata_unlock(sdata);
2320 }
2321
2322 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2323 struct ieee80211_vif *vif)
2324 {
2325 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2326 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2327 struct cfg80211_bss *cbss;
2328 struct sk_buff *skb;
2329 const u8 *ssid;
2330 int ssid_len;
2331
2332 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2333 return NULL;
2334
2335 sdata_assert_lock(sdata);
2336
2337 if (ifmgd->associated)
2338 cbss = ifmgd->associated;
2339 else if (ifmgd->auth_data)
2340 cbss = ifmgd->auth_data->bss;
2341 else if (ifmgd->assoc_data)
2342 cbss = ifmgd->assoc_data->bss;
2343 else
2344 return NULL;
2345
2346 rcu_read_lock();
2347 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2348 if (WARN_ON_ONCE(ssid == NULL))
2349 ssid_len = 0;
2350 else
2351 ssid_len = ssid[1];
2352
2353 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2354 (u32) -1, cbss->channel,
2355 ssid + 2, ssid_len,
2356 NULL, 0, true);
2357 rcu_read_unlock();
2358
2359 return skb;
2360 }
2361 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2362
2363 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2364 const u8 *buf, size_t len, bool tx,
2365 u16 reason)
2366 {
2367 struct ieee80211_event event = {
2368 .type = MLME_EVENT,
2369 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2370 .u.mlme.reason = reason,
2371 };
2372
2373 if (tx)
2374 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2375 else
2376 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2377
2378 drv_event_callback(sdata->local, sdata, &event);
2379 }
2380
2381 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2382 {
2383 struct ieee80211_local *local = sdata->local;
2384 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2385 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2386
2387 sdata_lock(sdata);
2388 if (!ifmgd->associated) {
2389 sdata_unlock(sdata);
2390 return;
2391 }
2392
2393 /* AP is probably out of range (or not reachable for another reason) so
2394 * remove the bss struct for that AP.
2395 */
2396 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2397
2398 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2399 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2400 true, frame_buf);
2401 mutex_lock(&local->mtx);
2402 sdata->vif.csa_active = false;
2403 ifmgd->csa_waiting_bcn = false;
2404 if (sdata->csa_block_tx) {
2405 ieee80211_wake_vif_queues(local, sdata,
2406 IEEE80211_QUEUE_STOP_REASON_CSA);
2407 sdata->csa_block_tx = false;
2408 }
2409 mutex_unlock(&local->mtx);
2410
2411 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2412 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2413
2414 sdata_unlock(sdata);
2415 }
2416
2417 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2418 {
2419 struct ieee80211_sub_if_data *sdata =
2420 container_of(work, struct ieee80211_sub_if_data,
2421 u.mgd.beacon_connection_loss_work);
2422 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2423
2424 if (ifmgd->associated)
2425 ifmgd->beacon_loss_count++;
2426
2427 if (ifmgd->connection_loss) {
2428 sdata_info(sdata, "Connection to AP %pM lost\n",
2429 ifmgd->bssid);
2430 __ieee80211_disconnect(sdata);
2431 } else {
2432 ieee80211_mgd_probe_ap(sdata, true);
2433 }
2434 }
2435
2436 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2437 {
2438 struct ieee80211_sub_if_data *sdata =
2439 container_of(work, struct ieee80211_sub_if_data,
2440 u.mgd.csa_connection_drop_work);
2441
2442 __ieee80211_disconnect(sdata);
2443 }
2444
2445 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2446 {
2447 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2448 struct ieee80211_hw *hw = &sdata->local->hw;
2449
2450 trace_api_beacon_loss(sdata);
2451
2452 sdata->u.mgd.connection_loss = false;
2453 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2454 }
2455 EXPORT_SYMBOL(ieee80211_beacon_loss);
2456
2457 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2458 {
2459 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2460 struct ieee80211_hw *hw = &sdata->local->hw;
2461
2462 trace_api_connection_loss(sdata);
2463
2464 sdata->u.mgd.connection_loss = true;
2465 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2466 }
2467 EXPORT_SYMBOL(ieee80211_connection_loss);
2468
2469
2470 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2471 bool assoc)
2472 {
2473 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2474
2475 sdata_assert_lock(sdata);
2476
2477 if (!assoc) {
2478 /*
2479 * we are not authenticated yet, the only timer that could be
2480 * running is the timeout for the authentication response which
2481 * which is not relevant anymore.
2482 */
2483 del_timer_sync(&sdata->u.mgd.timer);
2484 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2485
2486 eth_zero_addr(sdata->u.mgd.bssid);
2487 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2488 sdata->u.mgd.flags = 0;
2489 mutex_lock(&sdata->local->mtx);
2490 ieee80211_vif_release_channel(sdata);
2491 mutex_unlock(&sdata->local->mtx);
2492 }
2493
2494 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2495 kfree(auth_data);
2496 sdata->u.mgd.auth_data = NULL;
2497 }
2498
2499 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2500 bool assoc, bool abandon)
2501 {
2502 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2503
2504 sdata_assert_lock(sdata);
2505
2506 if (!assoc) {
2507 /*
2508 * we are not associated yet, the only timer that could be
2509 * running is the timeout for the association response which
2510 * which is not relevant anymore.
2511 */
2512 del_timer_sync(&sdata->u.mgd.timer);
2513 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2514
2515 eth_zero_addr(sdata->u.mgd.bssid);
2516 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2517 sdata->u.mgd.flags = 0;
2518 sdata->vif.mu_mimo_owner = false;
2519
2520 mutex_lock(&sdata->local->mtx);
2521 ieee80211_vif_release_channel(sdata);
2522 mutex_unlock(&sdata->local->mtx);
2523
2524 if (abandon)
2525 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2526 }
2527
2528 kfree(assoc_data);
2529 sdata->u.mgd.assoc_data = NULL;
2530 }
2531
2532 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2533 struct ieee80211_mgmt *mgmt, size_t len)
2534 {
2535 struct ieee80211_local *local = sdata->local;
2536 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2537 u8 *pos;
2538 struct ieee802_11_elems elems;
2539 u32 tx_flags = 0;
2540
2541 pos = mgmt->u.auth.variable;
2542 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2543 if (!elems.challenge)
2544 return;
2545 auth_data->expected_transaction = 4;
2546 drv_mgd_prepare_tx(sdata->local, sdata);
2547 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2548 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2549 IEEE80211_TX_INTFL_MLME_CONN_TX;
2550 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2551 elems.challenge - 2, elems.challenge_len + 2,
2552 auth_data->bss->bssid, auth_data->bss->bssid,
2553 auth_data->key, auth_data->key_len,
2554 auth_data->key_idx, tx_flags);
2555 }
2556
2557 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2558 struct ieee80211_mgmt *mgmt, size_t len)
2559 {
2560 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2561 u8 bssid[ETH_ALEN];
2562 u16 auth_alg, auth_transaction, status_code;
2563 struct sta_info *sta;
2564 struct ieee80211_event event = {
2565 .type = MLME_EVENT,
2566 .u.mlme.data = AUTH_EVENT,
2567 };
2568
2569 sdata_assert_lock(sdata);
2570
2571 if (len < 24 + 6)
2572 return;
2573
2574 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2575 return;
2576
2577 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2578
2579 if (!ether_addr_equal(bssid, mgmt->bssid))
2580 return;
2581
2582 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2583 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2584 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2585
2586 if (auth_alg != ifmgd->auth_data->algorithm ||
2587 auth_transaction != ifmgd->auth_data->expected_transaction) {
2588 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2589 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2590 auth_transaction,
2591 ifmgd->auth_data->expected_transaction);
2592 return;
2593 }
2594
2595 if (status_code != WLAN_STATUS_SUCCESS) {
2596 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2597 mgmt->sa, status_code);
2598 ieee80211_destroy_auth_data(sdata, false);
2599 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2600 event.u.mlme.status = MLME_DENIED;
2601 event.u.mlme.reason = status_code;
2602 drv_event_callback(sdata->local, sdata, &event);
2603 return;
2604 }
2605
2606 switch (ifmgd->auth_data->algorithm) {
2607 case WLAN_AUTH_OPEN:
2608 case WLAN_AUTH_LEAP:
2609 case WLAN_AUTH_FT:
2610 case WLAN_AUTH_SAE:
2611 case WLAN_AUTH_FILS_SK:
2612 case WLAN_AUTH_FILS_SK_PFS:
2613 case WLAN_AUTH_FILS_PK:
2614 break;
2615 case WLAN_AUTH_SHARED_KEY:
2616 if (ifmgd->auth_data->expected_transaction != 4) {
2617 ieee80211_auth_challenge(sdata, mgmt, len);
2618 /* need another frame */
2619 return;
2620 }
2621 break;
2622 default:
2623 WARN_ONCE(1, "invalid auth alg %d",
2624 ifmgd->auth_data->algorithm);
2625 return;
2626 }
2627
2628 event.u.mlme.status = MLME_SUCCESS;
2629 drv_event_callback(sdata->local, sdata, &event);
2630 sdata_info(sdata, "authenticated\n");
2631 ifmgd->auth_data->done = true;
2632 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2633 ifmgd->auth_data->timeout_started = true;
2634 run_again(sdata, ifmgd->auth_data->timeout);
2635
2636 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2637 ifmgd->auth_data->expected_transaction != 2) {
2638 /*
2639 * Report auth frame to user space for processing since another
2640 * round of Authentication frames is still needed.
2641 */
2642 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2643 return;
2644 }
2645
2646 /* move station state to auth */
2647 mutex_lock(&sdata->local->sta_mtx);
2648 sta = sta_info_get(sdata, bssid);
2649 if (!sta) {
2650 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2651 goto out_err;
2652 }
2653 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2654 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2655 goto out_err;
2656 }
2657 mutex_unlock(&sdata->local->sta_mtx);
2658
2659 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2660 return;
2661 out_err:
2662 mutex_unlock(&sdata->local->sta_mtx);
2663 /* ignore frame -- wait for timeout */
2664 }
2665
2666 #define case_WLAN(type) \
2667 case WLAN_REASON_##type: return #type
2668
2669 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2670 {
2671 switch (reason_code) {
2672 case_WLAN(UNSPECIFIED);
2673 case_WLAN(PREV_AUTH_NOT_VALID);
2674 case_WLAN(DEAUTH_LEAVING);
2675 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2676 case_WLAN(DISASSOC_AP_BUSY);
2677 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2678 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2679 case_WLAN(DISASSOC_STA_HAS_LEFT);
2680 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2681 case_WLAN(DISASSOC_BAD_POWER);
2682 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2683 case_WLAN(INVALID_IE);
2684 case_WLAN(MIC_FAILURE);
2685 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2686 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2687 case_WLAN(IE_DIFFERENT);
2688 case_WLAN(INVALID_GROUP_CIPHER);
2689 case_WLAN(INVALID_PAIRWISE_CIPHER);
2690 case_WLAN(INVALID_AKMP);
2691 case_WLAN(UNSUPP_RSN_VERSION);
2692 case_WLAN(INVALID_RSN_IE_CAP);
2693 case_WLAN(IEEE8021X_FAILED);
2694 case_WLAN(CIPHER_SUITE_REJECTED);
2695 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2696 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2697 case_WLAN(DISASSOC_LOW_ACK);
2698 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2699 case_WLAN(QSTA_LEAVE_QBSS);
2700 case_WLAN(QSTA_NOT_USE);
2701 case_WLAN(QSTA_REQUIRE_SETUP);
2702 case_WLAN(QSTA_TIMEOUT);
2703 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2704 case_WLAN(MESH_PEER_CANCELED);
2705 case_WLAN(MESH_MAX_PEERS);
2706 case_WLAN(MESH_CONFIG);
2707 case_WLAN(MESH_CLOSE);
2708 case_WLAN(MESH_MAX_RETRIES);
2709 case_WLAN(MESH_CONFIRM_TIMEOUT);
2710 case_WLAN(MESH_INVALID_GTK);
2711 case_WLAN(MESH_INCONSISTENT_PARAM);
2712 case_WLAN(MESH_INVALID_SECURITY);
2713 case_WLAN(MESH_PATH_ERROR);
2714 case_WLAN(MESH_PATH_NOFORWARD);
2715 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2716 case_WLAN(MAC_EXISTS_IN_MBSS);
2717 case_WLAN(MESH_CHAN_REGULATORY);
2718 case_WLAN(MESH_CHAN);
2719 default: return "<unknown>";
2720 }
2721 }
2722
2723 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2724 struct ieee80211_mgmt *mgmt, size_t len)
2725 {
2726 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2727 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2728
2729 sdata_assert_lock(sdata);
2730
2731 if (len < 24 + 2)
2732 return;
2733
2734 if (ifmgd->associated &&
2735 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2736 const u8 *bssid = ifmgd->associated->bssid;
2737
2738 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2739 bssid, reason_code,
2740 ieee80211_get_reason_code_string(reason_code));
2741
2742 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2743
2744 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2745 reason_code);
2746 return;
2747 }
2748
2749 if (ifmgd->assoc_data &&
2750 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2751 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2752
2753 sdata_info(sdata,
2754 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2755 bssid, reason_code,
2756 ieee80211_get_reason_code_string(reason_code));
2757
2758 ieee80211_destroy_assoc_data(sdata, false, true);
2759
2760 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2761 return;
2762 }
2763 }
2764
2765
2766 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2767 struct ieee80211_mgmt *mgmt, size_t len)
2768 {
2769 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2770 u16 reason_code;
2771
2772 sdata_assert_lock(sdata);
2773
2774 if (len < 24 + 2)
2775 return;
2776
2777 if (!ifmgd->associated ||
2778 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2779 return;
2780
2781 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2782
2783 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
2784 mgmt->sa, reason_code,
2785 ieee80211_get_reason_code_string(reason_code));
2786
2787 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2788
2789 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2790 }
2791
2792 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2793 u8 *supp_rates, unsigned int supp_rates_len,
2794 u32 *rates, u32 *basic_rates,
2795 bool *have_higher_than_11mbit,
2796 int *min_rate, int *min_rate_index,
2797 int shift)
2798 {
2799 int i, j;
2800
2801 for (i = 0; i < supp_rates_len; i++) {
2802 int rate = supp_rates[i] & 0x7f;
2803 bool is_basic = !!(supp_rates[i] & 0x80);
2804
2805 if ((rate * 5 * (1 << shift)) > 110)
2806 *have_higher_than_11mbit = true;
2807
2808 /*
2809 * Skip HT and VHT BSS membership selectors since they're not
2810 * rates.
2811 *
2812 * Note: Even though the membership selector and the basic
2813 * rate flag share the same bit, they are not exactly
2814 * the same.
2815 */
2816 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
2817 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
2818 continue;
2819
2820 for (j = 0; j < sband->n_bitrates; j++) {
2821 struct ieee80211_rate *br;
2822 int brate;
2823
2824 br = &sband->bitrates[j];
2825
2826 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2827 if (brate == rate) {
2828 *rates |= BIT(j);
2829 if (is_basic)
2830 *basic_rates |= BIT(j);
2831 if ((rate * 5) < *min_rate) {
2832 *min_rate = rate * 5;
2833 *min_rate_index = j;
2834 }
2835 break;
2836 }
2837 }
2838 }
2839 }
2840
2841 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2842 struct cfg80211_bss *cbss,
2843 struct ieee80211_mgmt *mgmt, size_t len)
2844 {
2845 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2846 struct ieee80211_local *local = sdata->local;
2847 struct ieee80211_supported_band *sband;
2848 struct sta_info *sta;
2849 u8 *pos;
2850 u16 capab_info, aid;
2851 struct ieee802_11_elems elems;
2852 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2853 const struct cfg80211_bss_ies *bss_ies = NULL;
2854 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2855 u32 changed = 0;
2856 int err;
2857 bool ret;
2858
2859 /* AssocResp and ReassocResp have identical structure */
2860
2861 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2862 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2863
2864 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2865 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2866 aid);
2867 aid &= ~(BIT(15) | BIT(14));
2868
2869 ifmgd->broken_ap = false;
2870
2871 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2872 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2873 aid);
2874 aid = 0;
2875 ifmgd->broken_ap = true;
2876 }
2877
2878 pos = mgmt->u.assoc_resp.variable;
2879 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2880
2881 if (!elems.supp_rates) {
2882 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2883 return false;
2884 }
2885
2886 ifmgd->aid = aid;
2887 ifmgd->tdls_chan_switch_prohibited =
2888 elems.ext_capab && elems.ext_capab_len >= 5 &&
2889 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2890
2891 /*
2892 * Some APs are erroneously not including some information in their
2893 * (re)association response frames. Try to recover by using the data
2894 * from the beacon or probe response. This seems to afflict mobile
2895 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2896 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2897 */
2898 if ((assoc_data->wmm && !elems.wmm_param) ||
2899 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2900 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2901 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2902 (!elems.vht_cap_elem || !elems.vht_operation))) {
2903 const struct cfg80211_bss_ies *ies;
2904 struct ieee802_11_elems bss_elems;
2905
2906 rcu_read_lock();
2907 ies = rcu_dereference(cbss->ies);
2908 if (ies)
2909 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2910 GFP_ATOMIC);
2911 rcu_read_unlock();
2912 if (!bss_ies)
2913 return false;
2914
2915 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2916 false, &bss_elems);
2917 if (assoc_data->wmm &&
2918 !elems.wmm_param && bss_elems.wmm_param) {
2919 elems.wmm_param = bss_elems.wmm_param;
2920 sdata_info(sdata,
2921 "AP bug: WMM param missing from AssocResp\n");
2922 }
2923
2924 /*
2925 * Also check if we requested HT/VHT, otherwise the AP doesn't
2926 * have to include the IEs in the (re)association response.
2927 */
2928 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2929 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2930 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2931 sdata_info(sdata,
2932 "AP bug: HT capability missing from AssocResp\n");
2933 }
2934 if (!elems.ht_operation && bss_elems.ht_operation &&
2935 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2936 elems.ht_operation = bss_elems.ht_operation;
2937 sdata_info(sdata,
2938 "AP bug: HT operation missing from AssocResp\n");
2939 }
2940 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2941 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2942 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2943 sdata_info(sdata,
2944 "AP bug: VHT capa missing from AssocResp\n");
2945 }
2946 if (!elems.vht_operation && bss_elems.vht_operation &&
2947 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2948 elems.vht_operation = bss_elems.vht_operation;
2949 sdata_info(sdata,
2950 "AP bug: VHT operation missing from AssocResp\n");
2951 }
2952 }
2953
2954 /*
2955 * We previously checked these in the beacon/probe response, so
2956 * they should be present here. This is just a safety net.
2957 */
2958 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2959 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2960 sdata_info(sdata,
2961 "HT AP is missing WMM params or HT capability/operation\n");
2962 ret = false;
2963 goto out;
2964 }
2965
2966 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2967 (!elems.vht_cap_elem || !elems.vht_operation)) {
2968 sdata_info(sdata,
2969 "VHT AP is missing VHT capability/operation\n");
2970 ret = false;
2971 goto out;
2972 }
2973
2974 mutex_lock(&sdata->local->sta_mtx);
2975 /*
2976 * station info was already allocated and inserted before
2977 * the association and should be available to us
2978 */
2979 sta = sta_info_get(sdata, cbss->bssid);
2980 if (WARN_ON(!sta)) {
2981 mutex_unlock(&sdata->local->sta_mtx);
2982 ret = false;
2983 goto out;
2984 }
2985
2986 sband = ieee80211_get_sband(sdata);
2987 if (!sband) {
2988 mutex_unlock(&sdata->local->sta_mtx);
2989 ret = false;
2990 goto out;
2991 }
2992
2993 /* Set up internal HT/VHT capabilities */
2994 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2995 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2996 elems.ht_cap_elem, sta);
2997
2998 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2999 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3000 elems.vht_cap_elem, sta);
3001
3002 /*
3003 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3004 * in their association response, so ignore that data for our own
3005 * configuration. If it changed since the last beacon, we'll get the
3006 * next beacon and update then.
3007 */
3008
3009 /*
3010 * If an operating mode notification IE is present, override the
3011 * NSS calculation (that would be done in rate_control_rate_init())
3012 * and use the # of streams from that element.
3013 */
3014 if (elems.opmode_notif &&
3015 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3016 u8 nss;
3017
3018 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3019 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3020 nss += 1;
3021 sta->sta.rx_nss = nss;
3022 }
3023
3024 rate_control_rate_init(sta);
3025
3026 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3027 set_sta_flag(sta, WLAN_STA_MFP);
3028 sta->sta.mfp = true;
3029 } else {
3030 sta->sta.mfp = false;
3031 }
3032
3033 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3034
3035 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3036 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3037 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3038 if (err) {
3039 sdata_info(sdata,
3040 "failed to move station %pM to desired state\n",
3041 sta->sta.addr);
3042 WARN_ON(__sta_info_destroy(sta));
3043 mutex_unlock(&sdata->local->sta_mtx);
3044 ret = false;
3045 goto out;
3046 }
3047
3048 mutex_unlock(&sdata->local->sta_mtx);
3049
3050 /*
3051 * Always handle WMM once after association regardless
3052 * of the first value the AP uses. Setting -1 here has
3053 * that effect because the AP values is an unsigned
3054 * 4-bit value.
3055 */
3056 ifmgd->wmm_last_param_set = -1;
3057
3058 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3059 ieee80211_set_wmm_default(sdata, false, false);
3060 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3061 elems.wmm_param_len)) {
3062 /* still enable QoS since we might have HT/VHT */
3063 ieee80211_set_wmm_default(sdata, false, true);
3064 /* set the disable-WMM flag in this case to disable
3065 * tracking WMM parameter changes in the beacon if
3066 * the parameters weren't actually valid. Doing so
3067 * avoids changing parameters very strangely when
3068 * the AP is going back and forth between valid and
3069 * invalid parameters.
3070 */
3071 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3072 }
3073 changed |= BSS_CHANGED_QOS;
3074
3075 if (elems.max_idle_period_ie) {
3076 bss_conf->max_idle_period =
3077 le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
3078 bss_conf->protected_keep_alive =
3079 !!(elems.max_idle_period_ie->idle_options &
3080 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3081 changed |= BSS_CHANGED_KEEP_ALIVE;
3082 } else {
3083 bss_conf->max_idle_period = 0;
3084 bss_conf->protected_keep_alive = false;
3085 }
3086
3087 /* set AID and assoc capability,
3088 * ieee80211_set_associated() will tell the driver */
3089 bss_conf->aid = aid;
3090 bss_conf->assoc_capability = capab_info;
3091 ieee80211_set_associated(sdata, cbss, changed);
3092
3093 /*
3094 * If we're using 4-addr mode, let the AP know that we're
3095 * doing so, so that it can create the STA VLAN on its side
3096 */
3097 if (ifmgd->use_4addr)
3098 ieee80211_send_4addr_nullfunc(local, sdata);
3099
3100 /*
3101 * Start timer to probe the connection to the AP now.
3102 * Also start the timer that will detect beacon loss.
3103 */
3104 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3105 ieee80211_sta_reset_beacon_monitor(sdata);
3106
3107 ret = true;
3108 out:
3109 kfree(bss_ies);
3110 return ret;
3111 }
3112
3113 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3114 struct ieee80211_mgmt *mgmt,
3115 size_t len)
3116 {
3117 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3118 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3119 u16 capab_info, status_code, aid;
3120 struct ieee802_11_elems elems;
3121 int ac, uapsd_queues = -1;
3122 u8 *pos;
3123 bool reassoc;
3124 struct cfg80211_bss *bss;
3125 struct ieee80211_event event = {
3126 .type = MLME_EVENT,
3127 .u.mlme.data = ASSOC_EVENT,
3128 };
3129
3130 sdata_assert_lock(sdata);
3131
3132 if (!assoc_data)
3133 return;
3134 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3135 return;
3136
3137 /*
3138 * AssocResp and ReassocResp have identical structure, so process both
3139 * of them in this function.
3140 */
3141
3142 if (len < 24 + 6)
3143 return;
3144
3145 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
3146 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3147 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3148 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3149
3150 sdata_info(sdata,
3151 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3152 reassoc ? "Rea" : "A", mgmt->sa,
3153 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3154
3155 if (assoc_data->fils_kek_len &&
3156 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3157 return;
3158
3159 pos = mgmt->u.assoc_resp.variable;
3160 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3161
3162 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3163 elems.timeout_int &&
3164 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3165 u32 tu, ms;
3166 tu = le32_to_cpu(elems.timeout_int->value);
3167 ms = tu * 1024 / 1000;
3168 sdata_info(sdata,
3169 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3170 mgmt->sa, tu, ms);
3171 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3172 assoc_data->timeout_started = true;
3173 if (ms > IEEE80211_ASSOC_TIMEOUT)
3174 run_again(sdata, assoc_data->timeout);
3175 return;
3176 }
3177
3178 bss = assoc_data->bss;
3179
3180 if (status_code != WLAN_STATUS_SUCCESS) {
3181 sdata_info(sdata, "%pM denied association (code=%d)\n",
3182 mgmt->sa, status_code);
3183 ieee80211_destroy_assoc_data(sdata, false, false);
3184 event.u.mlme.status = MLME_DENIED;
3185 event.u.mlme.reason = status_code;
3186 drv_event_callback(sdata->local, sdata, &event);
3187 } else {
3188 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3189 /* oops -- internal error -- send timeout for now */
3190 ieee80211_destroy_assoc_data(sdata, false, false);
3191 cfg80211_assoc_timeout(sdata->dev, bss);
3192 return;
3193 }
3194 event.u.mlme.status = MLME_SUCCESS;
3195 drv_event_callback(sdata->local, sdata, &event);
3196 sdata_info(sdata, "associated\n");
3197
3198 /*
3199 * destroy assoc_data afterwards, as otherwise an idle
3200 * recalc after assoc_data is NULL but before associated
3201 * is set can cause the interface to go idle
3202 */
3203 ieee80211_destroy_assoc_data(sdata, true, false);
3204
3205 /* get uapsd queues configuration */
3206 uapsd_queues = 0;
3207 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3208 if (sdata->tx_conf[ac].uapsd)
3209 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3210 }
3211
3212 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3213 }
3214
3215 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3216 struct ieee80211_mgmt *mgmt, size_t len,
3217 struct ieee80211_rx_status *rx_status,
3218 struct ieee802_11_elems *elems)
3219 {
3220 struct ieee80211_local *local = sdata->local;
3221 struct ieee80211_bss *bss;
3222 struct ieee80211_channel *channel;
3223
3224 sdata_assert_lock(sdata);
3225
3226 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3227 if (!channel)
3228 return;
3229
3230 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3231 channel);
3232 if (bss) {
3233 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3234 ieee80211_rx_bss_put(local, bss);
3235 }
3236 }
3237
3238
3239 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3240 struct sk_buff *skb)
3241 {
3242 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3243 struct ieee80211_if_managed *ifmgd;
3244 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3245 size_t baselen, len = skb->len;
3246 struct ieee802_11_elems elems;
3247
3248 ifmgd = &sdata->u.mgd;
3249
3250 sdata_assert_lock(sdata);
3251
3252 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3253 return; /* ignore ProbeResp to foreign address */
3254
3255 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3256 if (baselen > len)
3257 return;
3258
3259 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3260 false, &elems);
3261
3262 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3263
3264 if (ifmgd->associated &&
3265 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3266 ieee80211_reset_ap_probe(sdata);
3267 }
3268
3269 /*
3270 * This is the canonical list of information elements we care about,
3271 * the filter code also gives us all changes to the Microsoft OUI
3272 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3273 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3274 * changes to requested client power.
3275 *
3276 * We implement beacon filtering in software since that means we can
3277 * avoid processing the frame here and in cfg80211, and userspace
3278 * will not be able to tell whether the hardware supports it or not.
3279 *
3280 * XXX: This list needs to be dynamic -- userspace needs to be able to
3281 * add items it requires. It also needs to be able to tell us to
3282 * look out for other vendor IEs.
3283 */
3284 static const u64 care_about_ies =
3285 (1ULL << WLAN_EID_COUNTRY) |
3286 (1ULL << WLAN_EID_ERP_INFO) |
3287 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3288 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3289 (1ULL << WLAN_EID_HT_CAPABILITY) |
3290 (1ULL << WLAN_EID_HT_OPERATION) |
3291 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3292
3293 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3294 struct ieee80211_mgmt *mgmt, size_t len,
3295 struct ieee80211_rx_status *rx_status)
3296 {
3297 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3298 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3299 size_t baselen;
3300 struct ieee802_11_elems elems;
3301 struct ieee80211_local *local = sdata->local;
3302 struct ieee80211_chanctx_conf *chanctx_conf;
3303 struct ieee80211_channel *chan;
3304 struct sta_info *sta;
3305 u32 changed = 0;
3306 bool erp_valid;
3307 u8 erp_value = 0;
3308 u32 ncrc;
3309 u8 *bssid;
3310 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3311
3312 sdata_assert_lock(sdata);
3313
3314 /* Process beacon from the current BSS */
3315 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3316 if (baselen > len)
3317 return;
3318
3319 rcu_read_lock();
3320 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3321 if (!chanctx_conf) {
3322 rcu_read_unlock();
3323 return;
3324 }
3325
3326 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3327 rcu_read_unlock();
3328 return;
3329 }
3330 chan = chanctx_conf->def.chan;
3331 rcu_read_unlock();
3332
3333 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3334 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3335 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3336 len - baselen, false, &elems);
3337
3338 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3339 if (elems.tim && !elems.parse_error) {
3340 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3341 ifmgd->dtim_period = tim_ie->dtim_period;
3342 }
3343 ifmgd->have_beacon = true;
3344 ifmgd->assoc_data->need_beacon = false;
3345 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3346 sdata->vif.bss_conf.sync_tsf =
3347 le64_to_cpu(mgmt->u.beacon.timestamp);
3348 sdata->vif.bss_conf.sync_device_ts =
3349 rx_status->device_timestamp;
3350 if (elems.tim)
3351 sdata->vif.bss_conf.sync_dtim_count =
3352 elems.tim->dtim_count;
3353 else
3354 sdata->vif.bss_conf.sync_dtim_count = 0;
3355 }
3356 /* continue assoc process */
3357 ifmgd->assoc_data->timeout = jiffies;
3358 ifmgd->assoc_data->timeout_started = true;
3359 run_again(sdata, ifmgd->assoc_data->timeout);
3360 return;
3361 }
3362
3363 if (!ifmgd->associated ||
3364 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3365 return;
3366 bssid = ifmgd->associated->bssid;
3367
3368 /* Track average RSSI from the Beacon frames of the current AP */
3369 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3370 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3371 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3372 ifmgd->last_cqm_event_signal = 0;
3373 ifmgd->count_beacon_signal = 1;
3374 ifmgd->last_ave_beacon_signal = 0;
3375 } else {
3376 ifmgd->count_beacon_signal++;
3377 }
3378
3379 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3380
3381 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3382 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3383 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3384 int last_sig = ifmgd->last_ave_beacon_signal;
3385 struct ieee80211_event event = {
3386 .type = RSSI_EVENT,
3387 };
3388
3389 /*
3390 * if signal crosses either of the boundaries, invoke callback
3391 * with appropriate parameters
3392 */
3393 if (sig > ifmgd->rssi_max_thold &&
3394 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3395 ifmgd->last_ave_beacon_signal = sig;
3396 event.u.rssi.data = RSSI_EVENT_HIGH;
3397 drv_event_callback(local, sdata, &event);
3398 } else if (sig < ifmgd->rssi_min_thold &&
3399 (last_sig >= ifmgd->rssi_max_thold ||
3400 last_sig == 0)) {
3401 ifmgd->last_ave_beacon_signal = sig;
3402 event.u.rssi.data = RSSI_EVENT_LOW;
3403 drv_event_callback(local, sdata, &event);
3404 }
3405 }
3406
3407 if (bss_conf->cqm_rssi_thold &&
3408 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3409 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3410 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3411 int last_event = ifmgd->last_cqm_event_signal;
3412 int thold = bss_conf->cqm_rssi_thold;
3413 int hyst = bss_conf->cqm_rssi_hyst;
3414
3415 if (sig < thold &&
3416 (last_event == 0 || sig < last_event - hyst)) {
3417 ifmgd->last_cqm_event_signal = sig;
3418 ieee80211_cqm_rssi_notify(
3419 &sdata->vif,
3420 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3421 sig, GFP_KERNEL);
3422 } else if (sig > thold &&
3423 (last_event == 0 || sig > last_event + hyst)) {
3424 ifmgd->last_cqm_event_signal = sig;
3425 ieee80211_cqm_rssi_notify(
3426 &sdata->vif,
3427 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3428 sig, GFP_KERNEL);
3429 }
3430 }
3431
3432 if (bss_conf->cqm_rssi_low &&
3433 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3434 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3435 int last_event = ifmgd->last_cqm_event_signal;
3436 int low = bss_conf->cqm_rssi_low;
3437 int high = bss_conf->cqm_rssi_high;
3438
3439 if (sig < low &&
3440 (last_event == 0 || last_event >= low)) {
3441 ifmgd->last_cqm_event_signal = sig;
3442 ieee80211_cqm_rssi_notify(
3443 &sdata->vif,
3444 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3445 sig, GFP_KERNEL);
3446 } else if (sig > high &&
3447 (last_event == 0 || last_event <= high)) {
3448 ifmgd->last_cqm_event_signal = sig;
3449 ieee80211_cqm_rssi_notify(
3450 &sdata->vif,
3451 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3452 sig, GFP_KERNEL);
3453 }
3454 }
3455
3456 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3457 mlme_dbg_ratelimited(sdata,
3458 "cancelling AP probe due to a received beacon\n");
3459 ieee80211_reset_ap_probe(sdata);
3460 }
3461
3462 /*
3463 * Push the beacon loss detection into the future since
3464 * we are processing a beacon from the AP just now.
3465 */
3466 ieee80211_sta_reset_beacon_monitor(sdata);
3467
3468 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3469 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3470 len - baselen, false, &elems,
3471 care_about_ies, ncrc);
3472
3473 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3474 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3475 if (local->hw.conf.dynamic_ps_timeout > 0) {
3476 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3477 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3478 ieee80211_hw_config(local,
3479 IEEE80211_CONF_CHANGE_PS);
3480 }
3481 ieee80211_send_nullfunc(local, sdata, false);
3482 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3483 local->pspolling = true;
3484
3485 /*
3486 * Here is assumed that the driver will be
3487 * able to send ps-poll frame and receive a
3488 * response even though power save mode is
3489 * enabled, but some drivers might require
3490 * to disable power save here. This needs
3491 * to be investigated.
3492 */
3493 ieee80211_send_pspoll(local, sdata);
3494 }
3495 }
3496
3497 if (sdata->vif.p2p ||
3498 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3499 struct ieee80211_p2p_noa_attr noa = {};
3500 int ret;
3501
3502 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3503 len - baselen,
3504 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3505 (u8 *) &noa, sizeof(noa));
3506 if (ret >= 2) {
3507 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3508 /* valid noa_attr and index changed */
3509 sdata->u.mgd.p2p_noa_index = noa.index;
3510 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3511 changed |= BSS_CHANGED_P2P_PS;
3512 /*
3513 * make sure we update all information, the CRC
3514 * mechanism doesn't look at P2P attributes.
3515 */
3516 ifmgd->beacon_crc_valid = false;
3517 }
3518 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3519 /* noa_attr not found and we had valid noa_attr before */
3520 sdata->u.mgd.p2p_noa_index = -1;
3521 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3522 changed |= BSS_CHANGED_P2P_PS;
3523 ifmgd->beacon_crc_valid = false;
3524 }
3525 }
3526
3527 if (ifmgd->csa_waiting_bcn)
3528 ieee80211_chswitch_post_beacon(sdata);
3529
3530 /*
3531 * Update beacon timing and dtim count on every beacon appearance. This
3532 * will allow the driver to use the most updated values. Do it before
3533 * comparing this one with last received beacon.
3534 * IMPORTANT: These parameters would possibly be out of sync by the time
3535 * the driver will use them. The synchronized view is currently
3536 * guaranteed only in certain callbacks.
3537 */
3538 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3539 sdata->vif.bss_conf.sync_tsf =
3540 le64_to_cpu(mgmt->u.beacon.timestamp);
3541 sdata->vif.bss_conf.sync_device_ts =
3542 rx_status->device_timestamp;
3543 if (elems.tim)
3544 sdata->vif.bss_conf.sync_dtim_count =
3545 elems.tim->dtim_count;
3546 else
3547 sdata->vif.bss_conf.sync_dtim_count = 0;
3548 }
3549
3550 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3551 return;
3552 ifmgd->beacon_crc = ncrc;
3553 ifmgd->beacon_crc_valid = true;
3554
3555 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3556
3557 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3558 rx_status->device_timestamp,
3559 &elems, true);
3560
3561 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3562 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3563 elems.wmm_param_len))
3564 changed |= BSS_CHANGED_QOS;
3565
3566 /*
3567 * If we haven't had a beacon before, tell the driver about the
3568 * DTIM period (and beacon timing if desired) now.
3569 */
3570 if (!ifmgd->have_beacon) {
3571 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3572 if (elems.tim)
3573 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3574 else
3575 bss_conf->dtim_period = 1;
3576
3577 changed |= BSS_CHANGED_BEACON_INFO;
3578 ifmgd->have_beacon = true;
3579
3580 mutex_lock(&local->iflist_mtx);
3581 ieee80211_recalc_ps(local);
3582 mutex_unlock(&local->iflist_mtx);
3583
3584 ieee80211_recalc_ps_vif(sdata);
3585 }
3586
3587 if (elems.erp_info) {
3588 erp_valid = true;
3589 erp_value = elems.erp_info[0];
3590 } else {
3591 erp_valid = false;
3592 }
3593 changed |= ieee80211_handle_bss_capability(sdata,
3594 le16_to_cpu(mgmt->u.beacon.capab_info),
3595 erp_valid, erp_value);
3596
3597 mutex_lock(&local->sta_mtx);
3598 sta = sta_info_get(sdata, bssid);
3599
3600 if (ieee80211_config_bw(sdata, sta,
3601 elems.ht_cap_elem, elems.ht_operation,
3602 elems.vht_operation, bssid, &changed)) {
3603 mutex_unlock(&local->sta_mtx);
3604 sdata_info(sdata,
3605 "failed to follow AP %pM bandwidth change, disconnect\n",
3606 bssid);
3607 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3608 WLAN_REASON_DEAUTH_LEAVING,
3609 true, deauth_buf);
3610 ieee80211_report_disconnect(sdata, deauth_buf,
3611 sizeof(deauth_buf), true,
3612 WLAN_REASON_DEAUTH_LEAVING);
3613 return;
3614 }
3615
3616 if (sta && elems.opmode_notif)
3617 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3618 rx_status->band);
3619 mutex_unlock(&local->sta_mtx);
3620
3621 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3622 elems.country_elem,
3623 elems.country_elem_len,
3624 elems.pwr_constr_elem,
3625 elems.cisco_dtpc_elem);
3626
3627 ieee80211_bss_info_change_notify(sdata, changed);
3628 }
3629
3630 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3631 struct sk_buff *skb)
3632 {
3633 struct ieee80211_rx_status *rx_status;
3634 struct ieee80211_mgmt *mgmt;
3635 u16 fc;
3636 struct ieee802_11_elems elems;
3637 int ies_len;
3638
3639 rx_status = (struct ieee80211_rx_status *) skb->cb;
3640 mgmt = (struct ieee80211_mgmt *) skb->data;
3641 fc = le16_to_cpu(mgmt->frame_control);
3642
3643 sdata_lock(sdata);
3644
3645 switch (fc & IEEE80211_FCTL_STYPE) {
3646 case IEEE80211_STYPE_BEACON:
3647 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3648 break;
3649 case IEEE80211_STYPE_PROBE_RESP:
3650 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3651 break;
3652 case IEEE80211_STYPE_AUTH:
3653 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3654 break;
3655 case IEEE80211_STYPE_DEAUTH:
3656 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3657 break;
3658 case IEEE80211_STYPE_DISASSOC:
3659 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3660 break;
3661 case IEEE80211_STYPE_ASSOC_RESP:
3662 case IEEE80211_STYPE_REASSOC_RESP:
3663 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3664 break;
3665 case IEEE80211_STYPE_ACTION:
3666 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3667 ies_len = skb->len -
3668 offsetof(struct ieee80211_mgmt,
3669 u.action.u.chan_switch.variable);
3670
3671 if (ies_len < 0)
3672 break;
3673
3674 ieee802_11_parse_elems(
3675 mgmt->u.action.u.chan_switch.variable,
3676 ies_len, true, &elems);
3677
3678 if (elems.parse_error)
3679 break;
3680
3681 ieee80211_sta_process_chanswitch(sdata,
3682 rx_status->mactime,
3683 rx_status->device_timestamp,
3684 &elems, false);
3685 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3686 ies_len = skb->len -
3687 offsetof(struct ieee80211_mgmt,
3688 u.action.u.ext_chan_switch.variable);
3689
3690 if (ies_len < 0)
3691 break;
3692
3693 ieee802_11_parse_elems(
3694 mgmt->u.action.u.ext_chan_switch.variable,
3695 ies_len, true, &elems);
3696
3697 if (elems.parse_error)
3698 break;
3699
3700 /* for the handling code pretend this was also an IE */
3701 elems.ext_chansw_ie =
3702 &mgmt->u.action.u.ext_chan_switch.data;
3703
3704 ieee80211_sta_process_chanswitch(sdata,
3705 rx_status->mactime,
3706 rx_status->device_timestamp,
3707 &elems, false);
3708 }
3709 break;
3710 }
3711 sdata_unlock(sdata);
3712 }
3713
3714 static void ieee80211_sta_timer(struct timer_list *t)
3715 {
3716 struct ieee80211_sub_if_data *sdata =
3717 from_timer(sdata, t, u.mgd.timer);
3718
3719 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3720 }
3721
3722 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3723 u8 *bssid, u8 reason, bool tx)
3724 {
3725 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3726
3727 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3728 tx, frame_buf);
3729
3730 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3731 reason);
3732 }
3733
3734 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3735 {
3736 struct ieee80211_local *local = sdata->local;
3737 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3738 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3739 u32 tx_flags = 0;
3740 u16 trans = 1;
3741 u16 status = 0;
3742
3743 sdata_assert_lock(sdata);
3744
3745 if (WARN_ON_ONCE(!auth_data))
3746 return -EINVAL;
3747
3748 auth_data->tries++;
3749
3750 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3751 sdata_info(sdata, "authentication with %pM timed out\n",
3752 auth_data->bss->bssid);
3753
3754 /*
3755 * Most likely AP is not in the range so remove the
3756 * bss struct for that AP.
3757 */
3758 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3759
3760 return -ETIMEDOUT;
3761 }
3762
3763 drv_mgd_prepare_tx(local, sdata);
3764
3765 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3766 auth_data->bss->bssid, auth_data->tries,
3767 IEEE80211_AUTH_MAX_TRIES);
3768
3769 auth_data->expected_transaction = 2;
3770
3771 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3772 trans = auth_data->sae_trans;
3773 status = auth_data->sae_status;
3774 auth_data->expected_transaction = trans;
3775 }
3776
3777 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3778 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3779 IEEE80211_TX_INTFL_MLME_CONN_TX;
3780
3781 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3782 auth_data->data, auth_data->data_len,
3783 auth_data->bss->bssid,
3784 auth_data->bss->bssid, NULL, 0, 0,
3785 tx_flags);
3786
3787 if (tx_flags == 0) {
3788 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3789 auth_data->timeout_started = true;
3790 run_again(sdata, auth_data->timeout);
3791 } else {
3792 auth_data->timeout =
3793 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3794 auth_data->timeout_started = true;
3795 run_again(sdata, auth_data->timeout);
3796 }
3797
3798 return 0;
3799 }
3800
3801 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3802 {
3803 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3804 struct ieee80211_local *local = sdata->local;
3805
3806 sdata_assert_lock(sdata);
3807
3808 assoc_data->tries++;
3809 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3810 sdata_info(sdata, "association with %pM timed out\n",
3811 assoc_data->bss->bssid);
3812
3813 /*
3814 * Most likely AP is not in the range so remove the
3815 * bss struct for that AP.
3816 */
3817 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3818
3819 return -ETIMEDOUT;
3820 }
3821
3822 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3823 assoc_data->bss->bssid, assoc_data->tries,
3824 IEEE80211_ASSOC_MAX_TRIES);
3825 ieee80211_send_assoc(sdata);
3826
3827 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3828 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3829 assoc_data->timeout_started = true;
3830 run_again(sdata, assoc_data->timeout);
3831 } else {
3832 assoc_data->timeout =
3833 round_jiffies_up(jiffies +
3834 IEEE80211_ASSOC_TIMEOUT_LONG);
3835 assoc_data->timeout_started = true;
3836 run_again(sdata, assoc_data->timeout);
3837 }
3838
3839 return 0;
3840 }
3841
3842 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3843 __le16 fc, bool acked)
3844 {
3845 struct ieee80211_local *local = sdata->local;
3846
3847 sdata->u.mgd.status_fc = fc;
3848 sdata->u.mgd.status_acked = acked;
3849 sdata->u.mgd.status_received = true;
3850
3851 ieee80211_queue_work(&local->hw, &sdata->work);
3852 }
3853
3854 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3855 {
3856 struct ieee80211_local *local = sdata->local;
3857 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3858
3859 sdata_lock(sdata);
3860
3861 if (ifmgd->status_received) {
3862 __le16 fc = ifmgd->status_fc;
3863 bool status_acked = ifmgd->status_acked;
3864
3865 ifmgd->status_received = false;
3866 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3867 if (status_acked) {
3868 ifmgd->auth_data->timeout =
3869 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3870 run_again(sdata, ifmgd->auth_data->timeout);
3871 } else {
3872 ifmgd->auth_data->timeout = jiffies - 1;
3873 }
3874 ifmgd->auth_data->timeout_started = true;
3875 } else if (ifmgd->assoc_data &&
3876 (ieee80211_is_assoc_req(fc) ||
3877 ieee80211_is_reassoc_req(fc))) {
3878 if (status_acked) {
3879 ifmgd->assoc_data->timeout =
3880 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3881 run_again(sdata, ifmgd->assoc_data->timeout);
3882 } else {
3883 ifmgd->assoc_data->timeout = jiffies - 1;
3884 }
3885 ifmgd->assoc_data->timeout_started = true;
3886 }
3887 }
3888
3889 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3890 time_after(jiffies, ifmgd->auth_data->timeout)) {
3891 if (ifmgd->auth_data->done) {
3892 /*
3893 * ok ... we waited for assoc but userspace didn't,
3894 * so let's just kill the auth data
3895 */
3896 ieee80211_destroy_auth_data(sdata, false);
3897 } else if (ieee80211_auth(sdata)) {
3898 u8 bssid[ETH_ALEN];
3899 struct ieee80211_event event = {
3900 .type = MLME_EVENT,
3901 .u.mlme.data = AUTH_EVENT,
3902 .u.mlme.status = MLME_TIMEOUT,
3903 };
3904
3905 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3906
3907 ieee80211_destroy_auth_data(sdata, false);
3908
3909 cfg80211_auth_timeout(sdata->dev, bssid);
3910 drv_event_callback(sdata->local, sdata, &event);
3911 }
3912 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3913 run_again(sdata, ifmgd->auth_data->timeout);
3914
3915 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3916 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3917 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3918 ieee80211_do_assoc(sdata)) {
3919 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3920 struct ieee80211_event event = {
3921 .type = MLME_EVENT,
3922 .u.mlme.data = ASSOC_EVENT,
3923 .u.mlme.status = MLME_TIMEOUT,
3924 };
3925
3926 ieee80211_destroy_assoc_data(sdata, false, false);
3927 cfg80211_assoc_timeout(sdata->dev, bss);
3928 drv_event_callback(sdata->local, sdata, &event);
3929 }
3930 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3931 run_again(sdata, ifmgd->assoc_data->timeout);
3932
3933 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3934 ifmgd->associated) {
3935 u8 bssid[ETH_ALEN];
3936 int max_tries;
3937
3938 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3939
3940 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3941 max_tries = max_nullfunc_tries;
3942 else
3943 max_tries = max_probe_tries;
3944
3945 /* ACK received for nullfunc probing frame */
3946 if (!ifmgd->probe_send_count)
3947 ieee80211_reset_ap_probe(sdata);
3948 else if (ifmgd->nullfunc_failed) {
3949 if (ifmgd->probe_send_count < max_tries) {
3950 mlme_dbg(sdata,
3951 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3952 bssid, ifmgd->probe_send_count,
3953 max_tries);
3954 ieee80211_mgd_probe_ap_send(sdata);
3955 } else {
3956 mlme_dbg(sdata,
3957 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3958 bssid);
3959 ieee80211_sta_connection_lost(sdata, bssid,
3960 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3961 false);
3962 }
3963 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3964 run_again(sdata, ifmgd->probe_timeout);
3965 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3966 mlme_dbg(sdata,
3967 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3968 bssid, probe_wait_ms);
3969 ieee80211_sta_connection_lost(sdata, bssid,
3970 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3971 } else if (ifmgd->probe_send_count < max_tries) {
3972 mlme_dbg(sdata,
3973 "No probe response from AP %pM after %dms, try %d/%i\n",
3974 bssid, probe_wait_ms,
3975 ifmgd->probe_send_count, max_tries);
3976 ieee80211_mgd_probe_ap_send(sdata);
3977 } else {
3978 /*
3979 * We actually lost the connection ... or did we?
3980 * Let's make sure!
3981 */
3982 mlme_dbg(sdata,
3983 "No probe response from AP %pM after %dms, disconnecting.\n",
3984 bssid, probe_wait_ms);
3985
3986 ieee80211_sta_connection_lost(sdata, bssid,
3987 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3988 }
3989 }
3990
3991 sdata_unlock(sdata);
3992 }
3993
3994 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
3995 {
3996 struct ieee80211_sub_if_data *sdata =
3997 from_timer(sdata, t, u.mgd.bcn_mon_timer);
3998 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3999
4000 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4001 return;
4002
4003 sdata->u.mgd.connection_loss = false;
4004 ieee80211_queue_work(&sdata->local->hw,
4005 &sdata->u.mgd.beacon_connection_loss_work);
4006 }
4007
4008 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
4009 {
4010 struct ieee80211_sub_if_data *sdata =
4011 from_timer(sdata, t, u.mgd.conn_mon_timer);
4012 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4013 struct ieee80211_local *local = sdata->local;
4014
4015 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4016 return;
4017
4018 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4019 }
4020
4021 static void ieee80211_sta_monitor_work(struct work_struct *work)
4022 {
4023 struct ieee80211_sub_if_data *sdata =
4024 container_of(work, struct ieee80211_sub_if_data,
4025 u.mgd.monitor_work);
4026
4027 ieee80211_mgd_probe_ap(sdata, false);
4028 }
4029
4030 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4031 {
4032 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4033 __ieee80211_stop_poll(sdata);
4034
4035 /* let's probe the connection once */
4036 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4037 ieee80211_queue_work(&sdata->local->hw,
4038 &sdata->u.mgd.monitor_work);
4039 }
4040 }
4041
4042 #ifdef CONFIG_PM
4043 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4044 {
4045 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4046 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4047
4048 sdata_lock(sdata);
4049
4050 if (ifmgd->auth_data || ifmgd->assoc_data) {
4051 const u8 *bssid = ifmgd->auth_data ?
4052 ifmgd->auth_data->bss->bssid :
4053 ifmgd->assoc_data->bss->bssid;
4054
4055 /*
4056 * If we are trying to authenticate / associate while suspending,
4057 * cfg80211 won't know and won't actually abort those attempts,
4058 * thus we need to do that ourselves.
4059 */
4060 ieee80211_send_deauth_disassoc(sdata, bssid,
4061 IEEE80211_STYPE_DEAUTH,
4062 WLAN_REASON_DEAUTH_LEAVING,
4063 false, frame_buf);
4064 if (ifmgd->assoc_data)
4065 ieee80211_destroy_assoc_data(sdata, false, true);
4066 if (ifmgd->auth_data)
4067 ieee80211_destroy_auth_data(sdata, false);
4068 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4069 IEEE80211_DEAUTH_FRAME_LEN);
4070 }
4071
4072 /* This is a bit of a hack - we should find a better and more generic
4073 * solution to this. Normally when suspending, cfg80211 will in fact
4074 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4075 * auth (not so important) or assoc (this is the problem) process.
4076 *
4077 * As a consequence, it can happen that we are in the process of both
4078 * associating and suspending, and receive an association response
4079 * after cfg80211 has checked if it needs to disconnect, but before
4080 * we actually set the flag to drop incoming frames. This will then
4081 * cause the workqueue flush to process the association response in
4082 * the suspend, resulting in a successful association just before it
4083 * tries to remove the interface from the driver, which now though
4084 * has a channel context assigned ... this results in issues.
4085 *
4086 * To work around this (for now) simply deauth here again if we're
4087 * now connected.
4088 */
4089 if (ifmgd->associated && !sdata->local->wowlan) {
4090 u8 bssid[ETH_ALEN];
4091 struct cfg80211_deauth_request req = {
4092 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4093 .bssid = bssid,
4094 };
4095
4096 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4097 ieee80211_mgd_deauth(sdata, &req);
4098 }
4099
4100 sdata_unlock(sdata);
4101 }
4102
4103 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4104 {
4105 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4106
4107 sdata_lock(sdata);
4108 if (!ifmgd->associated) {
4109 sdata_unlock(sdata);
4110 return;
4111 }
4112
4113 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4114 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4115 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4116 ieee80211_sta_connection_lost(sdata,
4117 ifmgd->associated->bssid,
4118 WLAN_REASON_UNSPECIFIED,
4119 true);
4120 sdata_unlock(sdata);
4121 return;
4122 }
4123 sdata_unlock(sdata);
4124 }
4125 #endif
4126
4127 /* interface setup */
4128 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4129 {
4130 struct ieee80211_if_managed *ifmgd;
4131
4132 ifmgd = &sdata->u.mgd;
4133 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4134 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4135 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4136 ieee80211_beacon_connection_loss_work);
4137 INIT_WORK(&ifmgd->csa_connection_drop_work,
4138 ieee80211_csa_connection_drop_work);
4139 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4140 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4141 ieee80211_tdls_peer_del_work);
4142 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
4143 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
4144 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
4145 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
4146 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4147 ieee80211_sta_handle_tspec_ac_params_wk);
4148
4149 ifmgd->flags = 0;
4150 ifmgd->powersave = sdata->wdev.ps;
4151 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4152 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4153 ifmgd->p2p_noa_index = -1;
4154
4155 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4156 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4157 else
4158 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4159
4160 /* Setup TDLS data */
4161 spin_lock_init(&ifmgd->teardown_lock);
4162 ifmgd->teardown_skb = NULL;
4163 ifmgd->orig_teardown_skb = NULL;
4164 }
4165
4166 /* scan finished notification */
4167 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4168 {
4169 struct ieee80211_sub_if_data *sdata;
4170
4171 /* Restart STA timers */
4172 rcu_read_lock();
4173 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4174 if (ieee80211_sdata_running(sdata))
4175 ieee80211_restart_sta_timer(sdata);
4176 }
4177 rcu_read_unlock();
4178 }
4179
4180 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4181 struct cfg80211_bss *cbss)
4182 {
4183 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4184 const u8 *ht_cap_ie, *vht_cap_ie;
4185 const struct ieee80211_ht_cap *ht_cap;
4186 const struct ieee80211_vht_cap *vht_cap;
4187 u8 chains = 1;
4188
4189 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4190 return chains;
4191
4192 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4193 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4194 ht_cap = (void *)(ht_cap_ie + 2);
4195 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4196 /*
4197 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4198 * "Tx Unequal Modulation Supported" fields.
4199 */
4200 }
4201
4202 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4203 return chains;
4204
4205 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4206 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4207 u8 nss;
4208 u16 tx_mcs_map;
4209
4210 vht_cap = (void *)(vht_cap_ie + 2);
4211 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4212 for (nss = 8; nss > 0; nss--) {
4213 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4214 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4215 break;
4216 }
4217 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4218 chains = max(chains, nss);
4219 }
4220
4221 return chains;
4222 }
4223
4224 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4225 struct cfg80211_bss *cbss)
4226 {
4227 struct ieee80211_local *local = sdata->local;
4228 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4229 const struct ieee80211_ht_cap *ht_cap = NULL;
4230 const struct ieee80211_ht_operation *ht_oper = NULL;
4231 const struct ieee80211_vht_operation *vht_oper = NULL;
4232 struct ieee80211_supported_band *sband;
4233 struct cfg80211_chan_def chandef;
4234 int ret;
4235 u32 i;
4236 bool have_80mhz;
4237
4238 sband = local->hw.wiphy->bands[cbss->channel->band];
4239
4240 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4241 IEEE80211_STA_DISABLE_80P80MHZ |
4242 IEEE80211_STA_DISABLE_160MHZ);
4243
4244 rcu_read_lock();
4245
4246 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4247 sband->ht_cap.ht_supported) {
4248 const u8 *ht_oper_ie, *ht_cap_ie;
4249
4250 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4251 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4252 ht_oper = (void *)(ht_oper_ie + 2);
4253
4254 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4255 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4256 ht_cap = (void *)(ht_cap_ie + 2);
4257
4258 if (!ht_cap) {
4259 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4260 ht_oper = NULL;
4261 }
4262 }
4263
4264 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4265 sband->vht_cap.vht_supported) {
4266 const u8 *vht_oper_ie, *vht_cap;
4267
4268 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4269 WLAN_EID_VHT_OPERATION);
4270 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4271 vht_oper = (void *)(vht_oper_ie + 2);
4272 if (vht_oper && !ht_oper) {
4273 vht_oper = NULL;
4274 sdata_info(sdata,
4275 "AP advertised VHT without HT, disabling both\n");
4276 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4277 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4278 }
4279
4280 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4281 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4282 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4283 vht_oper = NULL;
4284 }
4285 }
4286
4287 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4288 have_80mhz = false;
4289 for (i = 0; i < sband->n_channels; i++) {
4290 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4291 IEEE80211_CHAN_NO_80MHZ))
4292 continue;
4293
4294 have_80mhz = true;
4295 break;
4296 }
4297
4298 if (!have_80mhz)
4299 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4300
4301 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4302 cbss->channel,
4303 ht_oper, vht_oper,
4304 &chandef, false);
4305
4306 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4307 local->rx_chains);
4308
4309 rcu_read_unlock();
4310
4311 /* will change later if needed */
4312 sdata->smps_mode = IEEE80211_SMPS_OFF;
4313
4314 mutex_lock(&local->mtx);
4315 /*
4316 * If this fails (possibly due to channel context sharing
4317 * on incompatible channels, e.g. 80+80 and 160 sharing the
4318 * same control channel) try to use a smaller bandwidth.
4319 */
4320 ret = ieee80211_vif_use_channel(sdata, &chandef,
4321 IEEE80211_CHANCTX_SHARED);
4322
4323 /* don't downgrade for 5 and 10 MHz channels, though. */
4324 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4325 chandef.width == NL80211_CHAN_WIDTH_10)
4326 goto out;
4327
4328 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4329 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4330 ret = ieee80211_vif_use_channel(sdata, &chandef,
4331 IEEE80211_CHANCTX_SHARED);
4332 }
4333 out:
4334 mutex_unlock(&local->mtx);
4335 return ret;
4336 }
4337
4338 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4339 struct cfg80211_bss *cbss, bool assoc,
4340 bool override)
4341 {
4342 struct ieee80211_local *local = sdata->local;
4343 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4344 struct ieee80211_bss *bss = (void *)cbss->priv;
4345 struct sta_info *new_sta = NULL;
4346 struct ieee80211_supported_band *sband;
4347 bool have_sta = false;
4348 int err;
4349
4350 sband = local->hw.wiphy->bands[cbss->channel->band];
4351
4352 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4353 return -EINVAL;
4354
4355 /* If a reconfig is happening, bail out */
4356 if (local->in_reconfig)
4357 return -EBUSY;
4358
4359 if (assoc) {
4360 rcu_read_lock();
4361 have_sta = sta_info_get(sdata, cbss->bssid);
4362 rcu_read_unlock();
4363 }
4364
4365 if (!have_sta) {
4366 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4367 if (!new_sta)
4368 return -ENOMEM;
4369 }
4370
4371 /*
4372 * Set up the information for the new channel before setting the
4373 * new channel. We can't - completely race-free - change the basic
4374 * rates bitmap and the channel (sband) that it refers to, but if
4375 * we set it up before we at least avoid calling into the driver's
4376 * bss_info_changed() method with invalid information (since we do
4377 * call that from changing the channel - only for IDLE and perhaps
4378 * some others, but ...).
4379 *
4380 * So to avoid that, just set up all the new information before the
4381 * channel, but tell the driver to apply it only afterwards, since
4382 * it might need the new channel for that.
4383 */
4384 if (new_sta) {
4385 u32 rates = 0, basic_rates = 0;
4386 bool have_higher_than_11mbit;
4387 int min_rate = INT_MAX, min_rate_index = -1;
4388 const struct cfg80211_bss_ies *ies;
4389 int shift = ieee80211_vif_get_shift(&sdata->vif);
4390
4391 ieee80211_get_rates(sband, bss->supp_rates,
4392 bss->supp_rates_len,
4393 &rates, &basic_rates,
4394 &have_higher_than_11mbit,
4395 &min_rate, &min_rate_index,
4396 shift);
4397
4398 /*
4399 * This used to be a workaround for basic rates missing
4400 * in the association response frame. Now that we no
4401 * longer use the basic rates from there, it probably
4402 * doesn't happen any more, but keep the workaround so
4403 * in case some *other* APs are buggy in different ways
4404 * we can connect -- with a warning.
4405 */
4406 if (!basic_rates && min_rate_index >= 0) {
4407 sdata_info(sdata,
4408 "No basic rates, using min rate instead\n");
4409 basic_rates = BIT(min_rate_index);
4410 }
4411
4412 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4413 sdata->vif.bss_conf.basic_rates = basic_rates;
4414
4415 /* cf. IEEE 802.11 9.2.12 */
4416 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4417 have_higher_than_11mbit)
4418 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4419 else
4420 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4421
4422 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4423
4424 /* set timing information */
4425 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4426 rcu_read_lock();
4427 ies = rcu_dereference(cbss->beacon_ies);
4428 if (ies) {
4429 const u8 *tim_ie;
4430
4431 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4432 sdata->vif.bss_conf.sync_device_ts =
4433 bss->device_ts_beacon;
4434 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4435 ies->data, ies->len);
4436 if (tim_ie && tim_ie[1] >= 2)
4437 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4438 else
4439 sdata->vif.bss_conf.sync_dtim_count = 0;
4440 } else if (!ieee80211_hw_check(&sdata->local->hw,
4441 TIMING_BEACON_ONLY)) {
4442 ies = rcu_dereference(cbss->proberesp_ies);
4443 /* must be non-NULL since beacon IEs were NULL */
4444 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4445 sdata->vif.bss_conf.sync_device_ts =
4446 bss->device_ts_presp;
4447 sdata->vif.bss_conf.sync_dtim_count = 0;
4448 } else {
4449 sdata->vif.bss_conf.sync_tsf = 0;
4450 sdata->vif.bss_conf.sync_device_ts = 0;
4451 sdata->vif.bss_conf.sync_dtim_count = 0;
4452 }
4453 rcu_read_unlock();
4454 }
4455
4456 if (new_sta || override) {
4457 err = ieee80211_prep_channel(sdata, cbss);
4458 if (err) {
4459 if (new_sta)
4460 sta_info_free(local, new_sta);
4461 return -EINVAL;
4462 }
4463 }
4464
4465 if (new_sta) {
4466 /*
4467 * tell driver about BSSID, basic rates and timing
4468 * this was set up above, before setting the channel
4469 */
4470 ieee80211_bss_info_change_notify(sdata,
4471 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4472 BSS_CHANGED_BEACON_INT);
4473
4474 if (assoc)
4475 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4476
4477 err = sta_info_insert(new_sta);
4478 new_sta = NULL;
4479 if (err) {
4480 sdata_info(sdata,
4481 "failed to insert STA entry for the AP (error %d)\n",
4482 err);
4483 return err;
4484 }
4485 } else
4486 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4487
4488 /* Cancel scan to ensure that nothing interferes with connection */
4489 if (local->scanning)
4490 ieee80211_scan_cancel(local);
4491
4492 return 0;
4493 }
4494
4495 /* config hooks */
4496 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4497 struct cfg80211_auth_request *req)
4498 {
4499 struct ieee80211_local *local = sdata->local;
4500 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4501 struct ieee80211_mgd_auth_data *auth_data;
4502 u16 auth_alg;
4503 int err;
4504
4505 /* prepare auth data structure */
4506
4507 switch (req->auth_type) {
4508 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4509 auth_alg = WLAN_AUTH_OPEN;
4510 break;
4511 case NL80211_AUTHTYPE_SHARED_KEY:
4512 if (IS_ERR(local->wep_tx_tfm))
4513 return -EOPNOTSUPP;
4514 auth_alg = WLAN_AUTH_SHARED_KEY;
4515 break;
4516 case NL80211_AUTHTYPE_FT:
4517 auth_alg = WLAN_AUTH_FT;
4518 break;
4519 case NL80211_AUTHTYPE_NETWORK_EAP:
4520 auth_alg = WLAN_AUTH_LEAP;
4521 break;
4522 case NL80211_AUTHTYPE_SAE:
4523 auth_alg = WLAN_AUTH_SAE;
4524 break;
4525 case NL80211_AUTHTYPE_FILS_SK:
4526 auth_alg = WLAN_AUTH_FILS_SK;
4527 break;
4528 case NL80211_AUTHTYPE_FILS_SK_PFS:
4529 auth_alg = WLAN_AUTH_FILS_SK_PFS;
4530 break;
4531 case NL80211_AUTHTYPE_FILS_PK:
4532 auth_alg = WLAN_AUTH_FILS_PK;
4533 break;
4534 default:
4535 return -EOPNOTSUPP;
4536 }
4537
4538 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
4539 req->ie_len, GFP_KERNEL);
4540 if (!auth_data)
4541 return -ENOMEM;
4542
4543 auth_data->bss = req->bss;
4544
4545 if (req->auth_data_len >= 4) {
4546 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
4547 __le16 *pos = (__le16 *) req->auth_data;
4548
4549 auth_data->sae_trans = le16_to_cpu(pos[0]);
4550 auth_data->sae_status = le16_to_cpu(pos[1]);
4551 }
4552 memcpy(auth_data->data, req->auth_data + 4,
4553 req->auth_data_len - 4);
4554 auth_data->data_len += req->auth_data_len - 4;
4555 }
4556
4557 if (req->ie && req->ie_len) {
4558 memcpy(&auth_data->data[auth_data->data_len],
4559 req->ie, req->ie_len);
4560 auth_data->data_len += req->ie_len;
4561 }
4562
4563 if (req->key && req->key_len) {
4564 auth_data->key_len = req->key_len;
4565 auth_data->key_idx = req->key_idx;
4566 memcpy(auth_data->key, req->key, req->key_len);
4567 }
4568
4569 auth_data->algorithm = auth_alg;
4570
4571 /* try to authenticate/probe */
4572
4573 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4574 ifmgd->assoc_data) {
4575 err = -EBUSY;
4576 goto err_free;
4577 }
4578
4579 if (ifmgd->auth_data)
4580 ieee80211_destroy_auth_data(sdata, false);
4581
4582 /* prep auth_data so we don't go into idle on disassoc */
4583 ifmgd->auth_data = auth_data;
4584
4585 if (ifmgd->associated) {
4586 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4587
4588 sdata_info(sdata,
4589 "disconnect from AP %pM for new auth to %pM\n",
4590 ifmgd->associated->bssid, req->bss->bssid);
4591 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4592 WLAN_REASON_UNSPECIFIED,
4593 false, frame_buf);
4594
4595 ieee80211_report_disconnect(sdata, frame_buf,
4596 sizeof(frame_buf), true,
4597 WLAN_REASON_UNSPECIFIED);
4598 }
4599
4600 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4601
4602 err = ieee80211_prep_connection(sdata, req->bss, false, false);
4603 if (err)
4604 goto err_clear;
4605
4606 err = ieee80211_auth(sdata);
4607 if (err) {
4608 sta_info_destroy_addr(sdata, req->bss->bssid);
4609 goto err_clear;
4610 }
4611
4612 /* hold our own reference */
4613 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4614 return 0;
4615
4616 err_clear:
4617 eth_zero_addr(ifmgd->bssid);
4618 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4619 ifmgd->auth_data = NULL;
4620 mutex_lock(&sdata->local->mtx);
4621 ieee80211_vif_release_channel(sdata);
4622 mutex_unlock(&sdata->local->mtx);
4623 err_free:
4624 kfree(auth_data);
4625 return err;
4626 }
4627
4628 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4629 struct cfg80211_assoc_request *req)
4630 {
4631 struct ieee80211_local *local = sdata->local;
4632 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4633 struct ieee80211_bss *bss = (void *)req->bss->priv;
4634 struct ieee80211_mgd_assoc_data *assoc_data;
4635 const struct cfg80211_bss_ies *beacon_ies;
4636 struct ieee80211_supported_band *sband;
4637 const u8 *ssidie, *ht_ie, *vht_ie;
4638 int i, err;
4639 bool override = false;
4640
4641 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4642 if (!assoc_data)
4643 return -ENOMEM;
4644
4645 rcu_read_lock();
4646 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4647 if (!ssidie) {
4648 rcu_read_unlock();
4649 kfree(assoc_data);
4650 return -EINVAL;
4651 }
4652 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4653 assoc_data->ssid_len = ssidie[1];
4654 rcu_read_unlock();
4655
4656 if (ifmgd->associated) {
4657 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4658
4659 sdata_info(sdata,
4660 "disconnect from AP %pM for new assoc to %pM\n",
4661 ifmgd->associated->bssid, req->bss->bssid);
4662 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4663 WLAN_REASON_UNSPECIFIED,
4664 false, frame_buf);
4665
4666 ieee80211_report_disconnect(sdata, frame_buf,
4667 sizeof(frame_buf), true,
4668 WLAN_REASON_UNSPECIFIED);
4669 }
4670
4671 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4672 err = -EBUSY;
4673 goto err_free;
4674 }
4675
4676 if (ifmgd->assoc_data) {
4677 err = -EBUSY;
4678 goto err_free;
4679 }
4680
4681 if (ifmgd->auth_data) {
4682 bool match;
4683
4684 /* keep sta info, bssid if matching */
4685 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4686 ieee80211_destroy_auth_data(sdata, match);
4687 }
4688
4689 /* prepare assoc data */
4690
4691 ifmgd->beacon_crc_valid = false;
4692
4693 assoc_data->wmm = bss->wmm_used &&
4694 (local->hw.queues >= IEEE80211_NUM_ACS);
4695
4696 /*
4697 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4698 * We still associate in non-HT mode (11a/b/g) if any one of these
4699 * ciphers is configured as pairwise.
4700 * We can set this to true for non-11n hardware, that'll be checked
4701 * separately along with the peer capabilities.
4702 */
4703 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4704 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4705 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4706 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4707 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4708 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4709 netdev_info(sdata->dev,
4710 "disabling HT/VHT due to WEP/TKIP use\n");
4711 }
4712 }
4713
4714 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4715 sband = local->hw.wiphy->bands[req->bss->channel->band];
4716 if (!sband->ht_cap.ht_supported ||
4717 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4718 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4719 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4720 if (!bss->wmm_used &&
4721 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4722 netdev_info(sdata->dev,
4723 "disabling HT as WMM/QoS is not supported by the AP\n");
4724 }
4725
4726 /* disable VHT if we don't support it or the AP doesn't use WMM */
4727 if (!sband->vht_cap.vht_supported ||
4728 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4729 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4730 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4731 if (!bss->wmm_used &&
4732 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4733 netdev_info(sdata->dev,
4734 "disabling VHT as WMM/QoS is not supported by the AP\n");
4735 }
4736
4737 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4738 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4739 sizeof(ifmgd->ht_capa_mask));
4740
4741 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4742 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4743 sizeof(ifmgd->vht_capa_mask));
4744
4745 if (req->ie && req->ie_len) {
4746 memcpy(assoc_data->ie, req->ie, req->ie_len);
4747 assoc_data->ie_len = req->ie_len;
4748 }
4749
4750 if (req->fils_kek) {
4751 /* should already be checked in cfg80211 - so warn */
4752 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
4753 err = -EINVAL;
4754 goto err_free;
4755 }
4756 memcpy(assoc_data->fils_kek, req->fils_kek,
4757 req->fils_kek_len);
4758 assoc_data->fils_kek_len = req->fils_kek_len;
4759 }
4760
4761 if (req->fils_nonces)
4762 memcpy(assoc_data->fils_nonces, req->fils_nonces,
4763 2 * FILS_NONCE_LEN);
4764
4765 assoc_data->bss = req->bss;
4766
4767 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4768 if (ifmgd->powersave)
4769 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4770 else
4771 sdata->smps_mode = IEEE80211_SMPS_OFF;
4772 } else
4773 sdata->smps_mode = ifmgd->req_smps;
4774
4775 assoc_data->capability = req->bss->capability;
4776 assoc_data->supp_rates = bss->supp_rates;
4777 assoc_data->supp_rates_len = bss->supp_rates_len;
4778
4779 rcu_read_lock();
4780 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4781 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4782 assoc_data->ap_ht_param =
4783 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4784 else
4785 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4786 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4787 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4788 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4789 sizeof(struct ieee80211_vht_cap));
4790 else
4791 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4792 rcu_read_unlock();
4793
4794 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4795 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4796 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4797 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4798
4799 if (bss->wmm_used && bss->uapsd_supported &&
4800 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4801 assoc_data->uapsd = true;
4802 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4803 } else {
4804 assoc_data->uapsd = false;
4805 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4806 }
4807
4808 if (req->prev_bssid)
4809 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4810
4811 if (req->use_mfp) {
4812 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4813 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4814 } else {
4815 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4816 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4817 }
4818
4819 if (req->flags & ASSOC_REQ_USE_RRM)
4820 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4821 else
4822 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4823
4824 if (req->crypto.control_port)
4825 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4826 else
4827 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4828
4829 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4830 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4831 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4832 sdata->vif.type);
4833
4834 /* kick off associate process */
4835
4836 ifmgd->assoc_data = assoc_data;
4837 ifmgd->dtim_period = 0;
4838 ifmgd->have_beacon = false;
4839
4840 /* override HT/VHT configuration only if the AP and we support it */
4841 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4842 struct ieee80211_sta_ht_cap sta_ht_cap;
4843
4844 if (req->flags & ASSOC_REQ_DISABLE_HT)
4845 override = true;
4846
4847 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4848 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4849
4850 /* check for 40 MHz disable override */
4851 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4852 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4853 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4854 override = true;
4855
4856 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4857 req->flags & ASSOC_REQ_DISABLE_VHT)
4858 override = true;
4859 }
4860
4861 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4862 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4863 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4864 }
4865
4866 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4867 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4868
4869 err = ieee80211_prep_connection(sdata, req->bss, true, override);
4870 if (err)
4871 goto err_clear;
4872
4873 rcu_read_lock();
4874 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4875
4876 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4877 !beacon_ies) {
4878 /*
4879 * Wait up to one beacon interval ...
4880 * should this be more if we miss one?
4881 */
4882 sdata_info(sdata, "waiting for beacon from %pM\n",
4883 ifmgd->bssid);
4884 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4885 assoc_data->timeout_started = true;
4886 assoc_data->need_beacon = true;
4887 } else if (beacon_ies) {
4888 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4889 beacon_ies->data,
4890 beacon_ies->len);
4891 u8 dtim_count = 0;
4892
4893 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4894 const struct ieee80211_tim_ie *tim;
4895 tim = (void *)(tim_ie + 2);
4896 ifmgd->dtim_period = tim->dtim_period;
4897 dtim_count = tim->dtim_count;
4898 }
4899 ifmgd->have_beacon = true;
4900 assoc_data->timeout = jiffies;
4901 assoc_data->timeout_started = true;
4902
4903 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4904 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4905 sdata->vif.bss_conf.sync_device_ts =
4906 bss->device_ts_beacon;
4907 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4908 }
4909 } else {
4910 assoc_data->timeout = jiffies;
4911 assoc_data->timeout_started = true;
4912 }
4913 rcu_read_unlock();
4914
4915 run_again(sdata, assoc_data->timeout);
4916
4917 if (bss->corrupt_data) {
4918 char *corrupt_type = "data";
4919 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4920 if (bss->corrupt_data &
4921 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4922 corrupt_type = "beacon and probe response";
4923 else
4924 corrupt_type = "beacon";
4925 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4926 corrupt_type = "probe response";
4927 sdata_info(sdata, "associating with AP with corrupt %s\n",
4928 corrupt_type);
4929 }
4930
4931 return 0;
4932 err_clear:
4933 eth_zero_addr(ifmgd->bssid);
4934 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4935 ifmgd->assoc_data = NULL;
4936 err_free:
4937 kfree(assoc_data);
4938 return err;
4939 }
4940
4941 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4942 struct cfg80211_deauth_request *req)
4943 {
4944 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4945 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4946 bool tx = !req->local_state_change;
4947
4948 if (ifmgd->auth_data &&
4949 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4950 sdata_info(sdata,
4951 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4952 req->bssid, req->reason_code,
4953 ieee80211_get_reason_code_string(req->reason_code));
4954
4955 drv_mgd_prepare_tx(sdata->local, sdata);
4956 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4957 IEEE80211_STYPE_DEAUTH,
4958 req->reason_code, tx,
4959 frame_buf);
4960 ieee80211_destroy_auth_data(sdata, false);
4961 ieee80211_report_disconnect(sdata, frame_buf,
4962 sizeof(frame_buf), true,
4963 req->reason_code);
4964
4965 return 0;
4966 }
4967
4968 if (ifmgd->assoc_data &&
4969 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4970 sdata_info(sdata,
4971 "aborting association with %pM by local choice (Reason: %u=%s)\n",
4972 req->bssid, req->reason_code,
4973 ieee80211_get_reason_code_string(req->reason_code));
4974
4975 drv_mgd_prepare_tx(sdata->local, sdata);
4976 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4977 IEEE80211_STYPE_DEAUTH,
4978 req->reason_code, tx,
4979 frame_buf);
4980 ieee80211_destroy_assoc_data(sdata, false, true);
4981 ieee80211_report_disconnect(sdata, frame_buf,
4982 sizeof(frame_buf), true,
4983 req->reason_code);
4984 return 0;
4985 }
4986
4987 if (ifmgd->associated &&
4988 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4989 sdata_info(sdata,
4990 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4991 req->bssid, req->reason_code,
4992 ieee80211_get_reason_code_string(req->reason_code));
4993
4994 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4995 req->reason_code, tx, frame_buf);
4996 ieee80211_report_disconnect(sdata, frame_buf,
4997 sizeof(frame_buf), true,
4998 req->reason_code);
4999 return 0;
5000 }
5001
5002 return -ENOTCONN;
5003 }
5004
5005 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5006 struct cfg80211_disassoc_request *req)
5007 {
5008 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5009 u8 bssid[ETH_ALEN];
5010 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5011
5012 /*
5013 * cfg80211 should catch this ... but it's racy since
5014 * we can receive a disassoc frame, process it, hand it
5015 * to cfg80211 while that's in a locked section already
5016 * trying to tell us that the user wants to disconnect.
5017 */
5018 if (ifmgd->associated != req->bss)
5019 return -ENOLINK;
5020
5021 sdata_info(sdata,
5022 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5023 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5024
5025 memcpy(bssid, req->bss->bssid, ETH_ALEN);
5026 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5027 req->reason_code, !req->local_state_change,
5028 frame_buf);
5029
5030 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5031 req->reason_code);
5032
5033 return 0;
5034 }
5035
5036 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5037 {
5038 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5039
5040 /*
5041 * Make sure some work items will not run after this,
5042 * they will not do anything but might not have been
5043 * cancelled when disconnecting.
5044 */
5045 cancel_work_sync(&ifmgd->monitor_work);
5046 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5047 cancel_work_sync(&ifmgd->request_smps_work);
5048 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5049 cancel_work_sync(&ifmgd->chswitch_work);
5050 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5051
5052 sdata_lock(sdata);
5053 if (ifmgd->assoc_data) {
5054 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5055 ieee80211_destroy_assoc_data(sdata, false, false);
5056 cfg80211_assoc_timeout(sdata->dev, bss);
5057 }
5058 if (ifmgd->auth_data)
5059 ieee80211_destroy_auth_data(sdata, false);
5060 spin_lock_bh(&ifmgd->teardown_lock);
5061 if (ifmgd->teardown_skb) {
5062 kfree_skb(ifmgd->teardown_skb);
5063 ifmgd->teardown_skb = NULL;
5064 ifmgd->orig_teardown_skb = NULL;
5065 }
5066 spin_unlock_bh(&ifmgd->teardown_lock);
5067 del_timer_sync(&ifmgd->timer);
5068 sdata_unlock(sdata);
5069 }
5070
5071 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5072 enum nl80211_cqm_rssi_threshold_event rssi_event,
5073 s32 rssi_level,
5074 gfp_t gfp)
5075 {
5076 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5077
5078 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5079
5080 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5081 }
5082 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5083
5084 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5085 {
5086 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5087
5088 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5089
5090 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5091 }
5092 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
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