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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_TIMEOUT_SAE (HZ * 2)
39 #define IEEE80211_AUTH_MAX_TRIES 3
40 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
41 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
42 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
43 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
44 #define IEEE80211_ASSOC_MAX_TRIES 3
45
46 static int max_nullfunc_tries = 2;
47 module_param(max_nullfunc_tries, int, 0644);
48 MODULE_PARM_DESC(max_nullfunc_tries,
49 "Maximum nullfunc tx tries before disconnecting (reason 4).");
50
51 static int max_probe_tries = 5;
52 module_param(max_probe_tries, int, 0644);
53 MODULE_PARM_DESC(max_probe_tries,
54 "Maximum probe tries before disconnecting (reason 4).");
55
56 /*
57 * Beacon loss timeout is calculated as N frames times the
58 * advertised beacon interval. This may need to be somewhat
59 * higher than what hardware might detect to account for
60 * delays in the host processing frames. But since we also
61 * probe on beacon miss before declaring the connection lost
62 * default to what we want.
63 */
64 static int beacon_loss_count = 7;
65 module_param(beacon_loss_count, int, 0644);
66 MODULE_PARM_DESC(beacon_loss_count,
67 "Number of beacon intervals before we decide beacon was lost.");
68
69 /*
70 * Time the connection can be idle before we probe
71 * it to see if we can still talk to the AP.
72 */
73 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
74 /*
75 * Time we wait for a probe response after sending
76 * a probe request because of beacon loss or for
77 * checking the connection still works.
78 */
79 static int probe_wait_ms = 500;
80 module_param(probe_wait_ms, int, 0644);
81 MODULE_PARM_DESC(probe_wait_ms,
82 "Maximum time(ms) to wait for probe response"
83 " before disconnecting (reason 4).");
84
85 /*
86 * How many Beacon frames need to have been used in average signal strength
87 * before starting to indicate signal change events.
88 */
89 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
90
91 /*
92 * We can have multiple work items (and connection probing)
93 * scheduling this timer, but we need to take care to only
94 * reschedule it when it should fire _earlier_ than it was
95 * asked for before, or if it's not pending right now. This
96 * function ensures that. Note that it then is required to
97 * run this function for all timeouts after the first one
98 * has happened -- the work that runs from this timer will
99 * do that.
100 */
101 static void run_again(struct ieee80211_sub_if_data *sdata,
102 unsigned long timeout)
103 {
104 sdata_assert_lock(sdata);
105
106 if (!timer_pending(&sdata->u.mgd.timer) ||
107 time_before(timeout, sdata->u.mgd.timer.expires))
108 mod_timer(&sdata->u.mgd.timer, timeout);
109 }
110
111 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
112 {
113 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
114 return;
115
116 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
117 return;
118
119 mod_timer(&sdata->u.mgd.bcn_mon_timer,
120 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
121 }
122
123 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
124 {
125 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
126
127 if (unlikely(!ifmgd->associated))
128 return;
129
130 if (ifmgd->probe_send_count)
131 ifmgd->probe_send_count = 0;
132
133 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
134 return;
135
136 mod_timer(&ifmgd->conn_mon_timer,
137 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
138 }
139
140 static int ecw2cw(int ecw)
141 {
142 return (1 << ecw) - 1;
143 }
144
145 static u32
146 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
147 struct ieee80211_supported_band *sband,
148 struct ieee80211_channel *channel,
149 const struct ieee80211_ht_operation *ht_oper,
150 const struct ieee80211_vht_operation *vht_oper,
151 struct cfg80211_chan_def *chandef, bool tracking)
152 {
153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
154 struct cfg80211_chan_def vht_chandef;
155 struct ieee80211_sta_ht_cap sta_ht_cap;
156 u32 ht_cfreq, ret;
157
158 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
159 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
160
161 chandef->chan = channel;
162 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
163 chandef->center_freq1 = channel->center_freq;
164 chandef->center_freq2 = 0;
165
166 if (!ht_oper || !sta_ht_cap.ht_supported) {
167 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
168 goto out;
169 }
170
171 chandef->width = NL80211_CHAN_WIDTH_20;
172
173 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
174 channel->band);
175 /* check that channel matches the right operating channel */
176 if (!tracking && channel->center_freq != ht_cfreq) {
177 /*
178 * It's possible that some APs are confused here;
179 * Netgear WNDR3700 sometimes reports 4 higher than
180 * the actual channel in association responses, but
181 * since we look at probe response/beacon data here
182 * it should be OK.
183 */
184 sdata_info(sdata,
185 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
186 channel->center_freq, ht_cfreq,
187 ht_oper->primary_chan, channel->band);
188 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
189 goto out;
190 }
191
192 /* check 40 MHz support, if we have it */
193 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
194 ieee80211_chandef_ht_oper(ht_oper, chandef);
195 } else {
196 /* 40 MHz (and 80 MHz) must be supported for VHT */
197 ret = IEEE80211_STA_DISABLE_VHT;
198 /* also mark 40 MHz disabled */
199 ret |= IEEE80211_STA_DISABLE_40MHZ;
200 goto out;
201 }
202
203 if (!vht_oper || !sband->vht_cap.vht_supported) {
204 ret = IEEE80211_STA_DISABLE_VHT;
205 goto out;
206 }
207
208 vht_chandef = *chandef;
209 if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) {
210 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
211 sdata_info(sdata,
212 "AP VHT information is invalid, disable VHT\n");
213 ret = IEEE80211_STA_DISABLE_VHT;
214 goto out;
215 }
216
217 if (!cfg80211_chandef_valid(&vht_chandef)) {
218 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
219 sdata_info(sdata,
220 "AP VHT information is invalid, disable VHT\n");
221 ret = IEEE80211_STA_DISABLE_VHT;
222 goto out;
223 }
224
225 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
226 ret = 0;
227 goto out;
228 }
229
230 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
231 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
232 sdata_info(sdata,
233 "AP VHT information doesn't match HT, disable VHT\n");
234 ret = IEEE80211_STA_DISABLE_VHT;
235 goto out;
236 }
237
238 *chandef = vht_chandef;
239
240 ret = 0;
241
242 out:
243 /*
244 * When tracking the current AP, don't do any further checks if the
245 * new chandef is identical to the one we're currently using for the
246 * connection. This keeps us from playing ping-pong with regulatory,
247 * without it the following can happen (for example):
248 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
249 * - AP advertises regdom US
250 * - CRDA loads regdom US with 80 MHz prohibited (old database)
251 * - the code below detects an unsupported channel, downgrades, and
252 * we disconnect from the AP in the caller
253 * - disconnect causes CRDA to reload world regdomain and the game
254 * starts anew.
255 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
256 *
257 * It seems possible that there are still scenarios with CSA or real
258 * bandwidth changes where a this could happen, but those cases are
259 * less common and wouldn't completely prevent using the AP.
260 */
261 if (tracking &&
262 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
263 return ret;
264
265 /* don't print the message below for VHT mismatch if VHT is disabled */
266 if (ret & IEEE80211_STA_DISABLE_VHT)
267 vht_chandef = *chandef;
268
269 /*
270 * Ignore the DISABLED flag when we're already connected and only
271 * tracking the APs beacon for bandwidth changes - otherwise we
272 * might get disconnected here if we connect to an AP, update our
273 * regulatory information based on the AP's country IE and the
274 * information we have is wrong/outdated and disables the channel
275 * that we're actually using for the connection to the AP.
276 */
277 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
278 tracking ? 0 :
279 IEEE80211_CHAN_DISABLED)) {
280 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
281 ret = IEEE80211_STA_DISABLE_HT |
282 IEEE80211_STA_DISABLE_VHT;
283 break;
284 }
285
286 ret |= ieee80211_chandef_downgrade(chandef);
287 }
288
289 if (chandef->width != vht_chandef.width && !tracking)
290 sdata_info(sdata,
291 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
292
293 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
294 return ret;
295 }
296
297 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
298 struct sta_info *sta,
299 const struct ieee80211_ht_cap *ht_cap,
300 const struct ieee80211_ht_operation *ht_oper,
301 const struct ieee80211_vht_operation *vht_oper,
302 const u8 *bssid, u32 *changed)
303 {
304 struct ieee80211_local *local = sdata->local;
305 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
306 struct ieee80211_supported_band *sband;
307 struct ieee80211_channel *chan;
308 struct cfg80211_chan_def chandef;
309 u16 ht_opmode;
310 u32 flags;
311 enum ieee80211_sta_rx_bandwidth new_sta_bw;
312 int ret;
313
314 /* if HT was/is disabled, don't track any bandwidth changes */
315 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
316 return 0;
317
318 /* don't check VHT if we associated as non-VHT station */
319 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
320 vht_oper = NULL;
321
322 if (WARN_ON_ONCE(!sta))
323 return -EINVAL;
324
325 /*
326 * if bss configuration changed store the new one -
327 * this may be applicable even if channel is identical
328 */
329 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
330 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
331 *changed |= BSS_CHANGED_HT;
332 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
333 }
334
335 chan = sdata->vif.bss_conf.chandef.chan;
336 sband = local->hw.wiphy->bands[chan->band];
337
338 /* calculate new channel (type) based on HT/VHT operation IEs */
339 flags = ieee80211_determine_chantype(sdata, sband, chan,
340 ht_oper, vht_oper,
341 &chandef, true);
342
343 /*
344 * Downgrade the new channel if we associated with restricted
345 * capabilities. For example, if we associated as a 20 MHz STA
346 * to a 40 MHz AP (due to regulatory, capabilities or config
347 * reasons) then switching to a 40 MHz channel now won't do us
348 * any good -- we couldn't use it with the AP.
349 */
350 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
351 chandef.width == NL80211_CHAN_WIDTH_80P80)
352 flags |= ieee80211_chandef_downgrade(&chandef);
353 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
354 chandef.width == NL80211_CHAN_WIDTH_160)
355 flags |= ieee80211_chandef_downgrade(&chandef);
356 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
357 chandef.width > NL80211_CHAN_WIDTH_20)
358 flags |= ieee80211_chandef_downgrade(&chandef);
359
360 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
361 return 0;
362
363 sdata_info(sdata,
364 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
365 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
366 chandef.center_freq1, chandef.center_freq2);
367
368 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
369 IEEE80211_STA_DISABLE_VHT |
370 IEEE80211_STA_DISABLE_40MHZ |
371 IEEE80211_STA_DISABLE_80P80MHZ |
372 IEEE80211_STA_DISABLE_160MHZ)) ||
373 !cfg80211_chandef_valid(&chandef)) {
374 sdata_info(sdata,
375 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
376 ifmgd->bssid);
377 return -EINVAL;
378 }
379
380 switch (chandef.width) {
381 case NL80211_CHAN_WIDTH_20_NOHT:
382 case NL80211_CHAN_WIDTH_20:
383 new_sta_bw = IEEE80211_STA_RX_BW_20;
384 break;
385 case NL80211_CHAN_WIDTH_40:
386 new_sta_bw = IEEE80211_STA_RX_BW_40;
387 break;
388 case NL80211_CHAN_WIDTH_80:
389 new_sta_bw = IEEE80211_STA_RX_BW_80;
390 break;
391 case NL80211_CHAN_WIDTH_80P80:
392 case NL80211_CHAN_WIDTH_160:
393 new_sta_bw = IEEE80211_STA_RX_BW_160;
394 break;
395 default:
396 return -EINVAL;
397 }
398
399 if (new_sta_bw > sta->cur_max_bandwidth)
400 new_sta_bw = sta->cur_max_bandwidth;
401
402 if (new_sta_bw < sta->sta.bandwidth) {
403 sta->sta.bandwidth = new_sta_bw;
404 rate_control_rate_update(local, sband, sta,
405 IEEE80211_RC_BW_CHANGED);
406 }
407
408 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
409 if (ret) {
410 sdata_info(sdata,
411 "AP %pM changed bandwidth to incompatible one - disconnect\n",
412 ifmgd->bssid);
413 return ret;
414 }
415
416 if (new_sta_bw > sta->sta.bandwidth) {
417 sta->sta.bandwidth = new_sta_bw;
418 rate_control_rate_update(local, sband, sta,
419 IEEE80211_RC_BW_CHANGED);
420 }
421
422 return 0;
423 }
424
425 /* frame sending functions */
426
427 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
428 struct sk_buff *skb, u8 ap_ht_param,
429 struct ieee80211_supported_band *sband,
430 struct ieee80211_channel *channel,
431 enum ieee80211_smps_mode smps)
432 {
433 u8 *pos;
434 u32 flags = channel->flags;
435 u16 cap;
436 struct ieee80211_sta_ht_cap ht_cap;
437
438 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
439
440 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
441 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
442
443 /* determine capability flags */
444 cap = ht_cap.cap;
445
446 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
447 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
448 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
449 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
450 cap &= ~IEEE80211_HT_CAP_SGI_40;
451 }
452 break;
453 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
454 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
455 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
456 cap &= ~IEEE80211_HT_CAP_SGI_40;
457 }
458 break;
459 }
460
461 /*
462 * If 40 MHz was disabled associate as though we weren't
463 * capable of 40 MHz -- some broken APs will never fall
464 * back to trying to transmit in 20 MHz.
465 */
466 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
467 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
468 cap &= ~IEEE80211_HT_CAP_SGI_40;
469 }
470
471 /* set SM PS mode properly */
472 cap &= ~IEEE80211_HT_CAP_SM_PS;
473 switch (smps) {
474 case IEEE80211_SMPS_AUTOMATIC:
475 case IEEE80211_SMPS_NUM_MODES:
476 WARN_ON(1);
477 case IEEE80211_SMPS_OFF:
478 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
479 IEEE80211_HT_CAP_SM_PS_SHIFT;
480 break;
481 case IEEE80211_SMPS_STATIC:
482 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
483 IEEE80211_HT_CAP_SM_PS_SHIFT;
484 break;
485 case IEEE80211_SMPS_DYNAMIC:
486 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
487 IEEE80211_HT_CAP_SM_PS_SHIFT;
488 break;
489 }
490
491 /* reserve and fill IE */
492 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
493 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
494 }
495
496 /* This function determines vht capability flags for the association
497 * and builds the IE.
498 * Note - the function may set the owner of the MU-MIMO capability
499 */
500 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
501 struct sk_buff *skb,
502 struct ieee80211_supported_band *sband,
503 struct ieee80211_vht_cap *ap_vht_cap)
504 {
505 struct ieee80211_local *local = sdata->local;
506 u8 *pos;
507 u32 cap;
508 struct ieee80211_sta_vht_cap vht_cap;
509 u32 mask, ap_bf_sts, our_bf_sts;
510
511 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
512
513 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
514 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
515
516 /* determine capability flags */
517 cap = vht_cap.cap;
518
519 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
520 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
521
522 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
523 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
524 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
525 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
526 }
527
528 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
529 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
530 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
531 }
532
533 /*
534 * Some APs apparently get confused if our capabilities are better
535 * than theirs, so restrict what we advertise in the assoc request.
536 */
537 if (!(ap_vht_cap->vht_cap_info &
538 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
539 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
540 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
541 else if (!(ap_vht_cap->vht_cap_info &
542 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
543 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
544
545 /*
546 * If some other vif is using the MU-MIMO capablity we cannot associate
547 * using MU-MIMO - this will lead to contradictions in the group-id
548 * mechanism.
549 * Ownership is defined since association request, in order to avoid
550 * simultaneous associations with MU-MIMO.
551 */
552 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
553 bool disable_mu_mimo = false;
554 struct ieee80211_sub_if_data *other;
555
556 list_for_each_entry_rcu(other, &local->interfaces, list) {
557 if (other->vif.mu_mimo_owner) {
558 disable_mu_mimo = true;
559 break;
560 }
561 }
562 if (disable_mu_mimo)
563 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
564 else
565 sdata->vif.mu_mimo_owner = true;
566 }
567
568 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
569
570 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
571 our_bf_sts = cap & mask;
572
573 if (ap_bf_sts < our_bf_sts) {
574 cap &= ~mask;
575 cap |= ap_bf_sts;
576 }
577
578 /* reserve and fill IE */
579 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
580 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
581 }
582
583 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
584 {
585 struct ieee80211_local *local = sdata->local;
586 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
587 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
588 struct sk_buff *skb;
589 struct ieee80211_mgmt *mgmt;
590 u8 *pos, qos_info;
591 size_t offset = 0, noffset;
592 int i, count, rates_len, supp_rates_len, shift;
593 u16 capab;
594 struct ieee80211_supported_band *sband;
595 struct ieee80211_chanctx_conf *chanctx_conf;
596 struct ieee80211_channel *chan;
597 u32 rates = 0;
598
599 sdata_assert_lock(sdata);
600
601 rcu_read_lock();
602 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
603 if (WARN_ON(!chanctx_conf)) {
604 rcu_read_unlock();
605 return;
606 }
607 chan = chanctx_conf->def.chan;
608 rcu_read_unlock();
609 sband = local->hw.wiphy->bands[chan->band];
610 shift = ieee80211_vif_get_shift(&sdata->vif);
611
612 if (assoc_data->supp_rates_len) {
613 /*
614 * Get all rates supported by the device and the AP as
615 * some APs don't like getting a superset of their rates
616 * in the association request (e.g. D-Link DAP 1353 in
617 * b-only mode)...
618 */
619 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
620 assoc_data->supp_rates,
621 assoc_data->supp_rates_len,
622 &rates);
623 } else {
624 /*
625 * In case AP not provide any supported rates information
626 * before association, we send information element(s) with
627 * all rates that we support.
628 */
629 rates_len = 0;
630 for (i = 0; i < sband->n_bitrates; i++) {
631 rates |= BIT(i);
632 rates_len++;
633 }
634 }
635
636 skb = alloc_skb(local->hw.extra_tx_headroom +
637 sizeof(*mgmt) + /* bit too much but doesn't matter */
638 2 + assoc_data->ssid_len + /* SSID */
639 4 + rates_len + /* (extended) rates */
640 4 + /* power capability */
641 2 + 2 * sband->n_channels + /* supported channels */
642 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
643 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
644 assoc_data->ie_len + /* extra IEs */
645 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
646 9, /* WMM */
647 GFP_KERNEL);
648 if (!skb)
649 return;
650
651 skb_reserve(skb, local->hw.extra_tx_headroom);
652
653 capab = WLAN_CAPABILITY_ESS;
654
655 if (sband->band == NL80211_BAND_2GHZ) {
656 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
657 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
658 }
659
660 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
661 capab |= WLAN_CAPABILITY_PRIVACY;
662
663 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
664 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
665 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
666
667 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
668 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
669
670 mgmt = skb_put_zero(skb, 24);
671 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
672 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
673 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
674
675 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
676 skb_put(skb, 10);
677 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
678 IEEE80211_STYPE_REASSOC_REQ);
679 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
680 mgmt->u.reassoc_req.listen_interval =
681 cpu_to_le16(local->hw.conf.listen_interval);
682 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
683 ETH_ALEN);
684 } else {
685 skb_put(skb, 4);
686 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
687 IEEE80211_STYPE_ASSOC_REQ);
688 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
689 mgmt->u.assoc_req.listen_interval =
690 cpu_to_le16(local->hw.conf.listen_interval);
691 }
692
693 /* SSID */
694 pos = skb_put(skb, 2 + assoc_data->ssid_len);
695 *pos++ = WLAN_EID_SSID;
696 *pos++ = assoc_data->ssid_len;
697 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
698
699 /* add all rates which were marked to be used above */
700 supp_rates_len = rates_len;
701 if (supp_rates_len > 8)
702 supp_rates_len = 8;
703
704 pos = skb_put(skb, supp_rates_len + 2);
705 *pos++ = WLAN_EID_SUPP_RATES;
706 *pos++ = supp_rates_len;
707
708 count = 0;
709 for (i = 0; i < sband->n_bitrates; i++) {
710 if (BIT(i) & rates) {
711 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
712 5 * (1 << shift));
713 *pos++ = (u8) rate;
714 if (++count == 8)
715 break;
716 }
717 }
718
719 if (rates_len > count) {
720 pos = skb_put(skb, rates_len - count + 2);
721 *pos++ = WLAN_EID_EXT_SUPP_RATES;
722 *pos++ = rates_len - count;
723
724 for (i++; i < sband->n_bitrates; i++) {
725 if (BIT(i) & rates) {
726 int rate;
727 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
728 5 * (1 << shift));
729 *pos++ = (u8) rate;
730 }
731 }
732 }
733
734 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
735 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
736 pos = skb_put(skb, 4);
737 *pos++ = WLAN_EID_PWR_CAPABILITY;
738 *pos++ = 2;
739 *pos++ = 0; /* min tx power */
740 /* max tx power */
741 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
742 }
743
744 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
745 /* TODO: get this in reg domain format */
746 pos = skb_put(skb, 2 * sband->n_channels + 2);
747 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
748 *pos++ = 2 * sband->n_channels;
749 for (i = 0; i < sband->n_channels; i++) {
750 *pos++ = ieee80211_frequency_to_channel(
751 sband->channels[i].center_freq);
752 *pos++ = 1; /* one channel in the subband*/
753 }
754 }
755
756 /* if present, add any custom IEs that go before HT */
757 if (assoc_data->ie_len) {
758 static const u8 before_ht[] = {
759 WLAN_EID_SSID,
760 WLAN_EID_SUPP_RATES,
761 WLAN_EID_EXT_SUPP_RATES,
762 WLAN_EID_PWR_CAPABILITY,
763 WLAN_EID_SUPPORTED_CHANNELS,
764 WLAN_EID_RSN,
765 WLAN_EID_QOS_CAPA,
766 WLAN_EID_RRM_ENABLED_CAPABILITIES,
767 WLAN_EID_MOBILITY_DOMAIN,
768 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
769 WLAN_EID_RIC_DATA, /* reassoc only */
770 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
771 };
772 static const u8 after_ric[] = {
773 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
774 WLAN_EID_HT_CAPABILITY,
775 WLAN_EID_BSS_COEX_2040,
776 /* luckily this is almost always there */
777 WLAN_EID_EXT_CAPABILITY,
778 WLAN_EID_QOS_TRAFFIC_CAPA,
779 WLAN_EID_TIM_BCAST_REQ,
780 WLAN_EID_INTERWORKING,
781 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
782 WLAN_EID_VHT_CAPABILITY,
783 WLAN_EID_OPMODE_NOTIF,
784 };
785
786 noffset = ieee80211_ie_split_ric(assoc_data->ie,
787 assoc_data->ie_len,
788 before_ht,
789 ARRAY_SIZE(before_ht),
790 after_ric,
791 ARRAY_SIZE(after_ric),
792 offset);
793 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
794 offset = noffset;
795 }
796
797 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
798 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
799 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
800
801 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
802 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
803 sband, chan, sdata->smps_mode);
804
805 /* if present, add any custom IEs that go before VHT */
806 if (assoc_data->ie_len) {
807 static const u8 before_vht[] = {
808 /*
809 * no need to list the ones split off before HT
810 * or generated here
811 */
812 WLAN_EID_BSS_COEX_2040,
813 WLAN_EID_EXT_CAPABILITY,
814 WLAN_EID_QOS_TRAFFIC_CAPA,
815 WLAN_EID_TIM_BCAST_REQ,
816 WLAN_EID_INTERWORKING,
817 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
818 };
819
820 /* RIC already taken above, so no need to handle here anymore */
821 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
822 before_vht, ARRAY_SIZE(before_vht),
823 offset);
824 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
825 offset = noffset;
826 }
827
828 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
829 ieee80211_add_vht_ie(sdata, skb, sband,
830 &assoc_data->ap_vht_cap);
831
832 /* if present, add any custom non-vendor IEs that go after HT */
833 if (assoc_data->ie_len) {
834 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
835 assoc_data->ie_len,
836 offset);
837 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
838 offset = noffset;
839 }
840
841 if (assoc_data->wmm) {
842 if (assoc_data->uapsd) {
843 qos_info = ifmgd->uapsd_queues;
844 qos_info |= (ifmgd->uapsd_max_sp_len <<
845 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
846 } else {
847 qos_info = 0;
848 }
849
850 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
851 }
852
853 /* add any remaining custom (i.e. vendor specific here) IEs */
854 if (assoc_data->ie_len) {
855 noffset = assoc_data->ie_len;
856 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
857 }
858
859 if (assoc_data->fils_kek_len &&
860 fils_encrypt_assoc_req(skb, assoc_data) < 0) {
861 dev_kfree_skb(skb);
862 return;
863 }
864
865 drv_mgd_prepare_tx(local, sdata);
866
867 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
868 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
869 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
870 IEEE80211_TX_INTFL_MLME_CONN_TX;
871 ieee80211_tx_skb(sdata, skb);
872 }
873
874 void ieee80211_send_pspoll(struct ieee80211_local *local,
875 struct ieee80211_sub_if_data *sdata)
876 {
877 struct ieee80211_pspoll *pspoll;
878 struct sk_buff *skb;
879
880 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
881 if (!skb)
882 return;
883
884 pspoll = (struct ieee80211_pspoll *) skb->data;
885 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
886
887 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
888 ieee80211_tx_skb(sdata, skb);
889 }
890
891 void ieee80211_send_nullfunc(struct ieee80211_local *local,
892 struct ieee80211_sub_if_data *sdata,
893 bool powersave)
894 {
895 struct sk_buff *skb;
896 struct ieee80211_hdr_3addr *nullfunc;
897 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
898
899 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, true);
900 if (!skb)
901 return;
902
903 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
904 if (powersave)
905 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
906
907 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
908 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
909
910 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
911 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
912
913 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
914 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
915
916 ieee80211_tx_skb(sdata, skb);
917 }
918
919 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
920 struct ieee80211_sub_if_data *sdata)
921 {
922 struct sk_buff *skb;
923 struct ieee80211_hdr *nullfunc;
924 __le16 fc;
925
926 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
927 return;
928
929 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
930 if (!skb)
931 return;
932
933 skb_reserve(skb, local->hw.extra_tx_headroom);
934
935 nullfunc = skb_put_zero(skb, 30);
936 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
937 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
938 nullfunc->frame_control = fc;
939 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
940 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
941 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
942 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
943
944 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
945 ieee80211_tx_skb(sdata, skb);
946 }
947
948 /* spectrum management related things */
949 static void ieee80211_chswitch_work(struct work_struct *work)
950 {
951 struct ieee80211_sub_if_data *sdata =
952 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
953 struct ieee80211_local *local = sdata->local;
954 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
955 int ret;
956
957 if (!ieee80211_sdata_running(sdata))
958 return;
959
960 sdata_lock(sdata);
961 mutex_lock(&local->mtx);
962 mutex_lock(&local->chanctx_mtx);
963
964 if (!ifmgd->associated)
965 goto out;
966
967 if (!sdata->vif.csa_active)
968 goto out;
969
970 /*
971 * using reservation isn't immediate as it may be deferred until later
972 * with multi-vif. once reservation is complete it will re-schedule the
973 * work with no reserved_chanctx so verify chandef to check if it
974 * completed successfully
975 */
976
977 if (sdata->reserved_chanctx) {
978 /*
979 * with multi-vif csa driver may call ieee80211_csa_finish()
980 * many times while waiting for other interfaces to use their
981 * reservations
982 */
983 if (sdata->reserved_ready)
984 goto out;
985
986 ret = ieee80211_vif_use_reserved_context(sdata);
987 if (ret) {
988 sdata_info(sdata,
989 "failed to use reserved channel context, disconnecting (err=%d)\n",
990 ret);
991 ieee80211_queue_work(&sdata->local->hw,
992 &ifmgd->csa_connection_drop_work);
993 goto out;
994 }
995
996 goto out;
997 }
998
999 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1000 &sdata->csa_chandef)) {
1001 sdata_info(sdata,
1002 "failed to finalize channel switch, disconnecting\n");
1003 ieee80211_queue_work(&sdata->local->hw,
1004 &ifmgd->csa_connection_drop_work);
1005 goto out;
1006 }
1007
1008 /* XXX: shouldn't really modify cfg80211-owned data! */
1009 ifmgd->associated->channel = sdata->csa_chandef.chan;
1010
1011 ifmgd->csa_waiting_bcn = true;
1012
1013 ieee80211_sta_reset_beacon_monitor(sdata);
1014 ieee80211_sta_reset_conn_monitor(sdata);
1015
1016 out:
1017 mutex_unlock(&local->chanctx_mtx);
1018 mutex_unlock(&local->mtx);
1019 sdata_unlock(sdata);
1020 }
1021
1022 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1023 {
1024 struct ieee80211_local *local = sdata->local;
1025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1026 int ret;
1027
1028 sdata_assert_lock(sdata);
1029
1030 WARN_ON(!sdata->vif.csa_active);
1031
1032 if (sdata->csa_block_tx) {
1033 ieee80211_wake_vif_queues(local, sdata,
1034 IEEE80211_QUEUE_STOP_REASON_CSA);
1035 sdata->csa_block_tx = false;
1036 }
1037
1038 sdata->vif.csa_active = false;
1039 ifmgd->csa_waiting_bcn = false;
1040
1041 ret = drv_post_channel_switch(sdata);
1042 if (ret) {
1043 sdata_info(sdata,
1044 "driver post channel switch failed, disconnecting\n");
1045 ieee80211_queue_work(&local->hw,
1046 &ifmgd->csa_connection_drop_work);
1047 return;
1048 }
1049
1050 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1051 }
1052
1053 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1054 {
1055 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1056 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1057
1058 trace_api_chswitch_done(sdata, success);
1059 if (!success) {
1060 sdata_info(sdata,
1061 "driver channel switch failed, disconnecting\n");
1062 ieee80211_queue_work(&sdata->local->hw,
1063 &ifmgd->csa_connection_drop_work);
1064 } else {
1065 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1066 }
1067 }
1068 EXPORT_SYMBOL(ieee80211_chswitch_done);
1069
1070 static void ieee80211_chswitch_timer(struct timer_list *t)
1071 {
1072 struct ieee80211_sub_if_data *sdata =
1073 from_timer(sdata, t, u.mgd.chswitch_timer);
1074
1075 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1076 }
1077
1078 static void
1079 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1080 u64 timestamp, u32 device_timestamp,
1081 struct ieee802_11_elems *elems,
1082 bool beacon)
1083 {
1084 struct ieee80211_local *local = sdata->local;
1085 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1086 struct cfg80211_bss *cbss = ifmgd->associated;
1087 struct ieee80211_chanctx_conf *conf;
1088 struct ieee80211_chanctx *chanctx;
1089 enum nl80211_band current_band;
1090 struct ieee80211_csa_ie csa_ie;
1091 struct ieee80211_channel_switch ch_switch;
1092 int res;
1093
1094 sdata_assert_lock(sdata);
1095
1096 if (!cbss)
1097 return;
1098
1099 if (local->scanning)
1100 return;
1101
1102 /* disregard subsequent announcements if we are already processing */
1103 if (sdata->vif.csa_active)
1104 return;
1105
1106 current_band = cbss->channel->band;
1107 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1108 ifmgd->flags,
1109 ifmgd->associated->bssid, &csa_ie);
1110 if (res < 0)
1111 ieee80211_queue_work(&local->hw,
1112 &ifmgd->csa_connection_drop_work);
1113 if (res)
1114 return;
1115
1116 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1117 IEEE80211_CHAN_DISABLED)) {
1118 sdata_info(sdata,
1119 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1120 ifmgd->associated->bssid,
1121 csa_ie.chandef.chan->center_freq,
1122 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1123 csa_ie.chandef.center_freq2);
1124 ieee80211_queue_work(&local->hw,
1125 &ifmgd->csa_connection_drop_work);
1126 return;
1127 }
1128
1129 if (cfg80211_chandef_identical(&csa_ie.chandef,
1130 &sdata->vif.bss_conf.chandef)) {
1131 if (ifmgd->csa_ignored_same_chan)
1132 return;
1133 sdata_info(sdata,
1134 "AP %pM tries to chanswitch to same channel, ignore\n",
1135 ifmgd->associated->bssid);
1136 ifmgd->csa_ignored_same_chan = true;
1137 return;
1138 }
1139
1140 /*
1141 * Drop all TDLS peers - either we disconnect or move to a different
1142 * channel from this point on. There's no telling what our peer will do.
1143 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1144 * have an incompatible wider chandef.
1145 */
1146 ieee80211_teardown_tdls_peers(sdata);
1147
1148 mutex_lock(&local->mtx);
1149 mutex_lock(&local->chanctx_mtx);
1150 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1151 lockdep_is_held(&local->chanctx_mtx));
1152 if (!conf) {
1153 sdata_info(sdata,
1154 "no channel context assigned to vif?, disconnecting\n");
1155 goto drop_connection;
1156 }
1157
1158 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1159
1160 if (local->use_chanctx &&
1161 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1162 sdata_info(sdata,
1163 "driver doesn't support chan-switch with channel contexts\n");
1164 goto drop_connection;
1165 }
1166
1167 ch_switch.timestamp = timestamp;
1168 ch_switch.device_timestamp = device_timestamp;
1169 ch_switch.block_tx = csa_ie.mode;
1170 ch_switch.chandef = csa_ie.chandef;
1171 ch_switch.count = csa_ie.count;
1172
1173 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1174 sdata_info(sdata,
1175 "preparing for channel switch failed, disconnecting\n");
1176 goto drop_connection;
1177 }
1178
1179 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1180 chanctx->mode, false);
1181 if (res) {
1182 sdata_info(sdata,
1183 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1184 res);
1185 goto drop_connection;
1186 }
1187 mutex_unlock(&local->chanctx_mtx);
1188
1189 sdata->vif.csa_active = true;
1190 sdata->csa_chandef = csa_ie.chandef;
1191 sdata->csa_block_tx = csa_ie.mode;
1192 ifmgd->csa_ignored_same_chan = false;
1193
1194 if (sdata->csa_block_tx)
1195 ieee80211_stop_vif_queues(local, sdata,
1196 IEEE80211_QUEUE_STOP_REASON_CSA);
1197 mutex_unlock(&local->mtx);
1198
1199 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1200 csa_ie.count);
1201
1202 if (local->ops->channel_switch) {
1203 /* use driver's channel switch callback */
1204 drv_channel_switch(local, sdata, &ch_switch);
1205 return;
1206 }
1207
1208 /* channel switch handled in software */
1209 if (csa_ie.count <= 1)
1210 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1211 else
1212 mod_timer(&ifmgd->chswitch_timer,
1213 TU_TO_EXP_TIME((csa_ie.count - 1) *
1214 cbss->beacon_interval));
1215 return;
1216 drop_connection:
1217 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1218 mutex_unlock(&local->chanctx_mtx);
1219 mutex_unlock(&local->mtx);
1220 }
1221
1222 static bool
1223 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1224 struct ieee80211_channel *channel,
1225 const u8 *country_ie, u8 country_ie_len,
1226 const u8 *pwr_constr_elem,
1227 int *chan_pwr, int *pwr_reduction)
1228 {
1229 struct ieee80211_country_ie_triplet *triplet;
1230 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1231 int i, chan_increment;
1232 bool have_chan_pwr = false;
1233
1234 /* Invalid IE */
1235 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1236 return false;
1237
1238 triplet = (void *)(country_ie + 3);
1239 country_ie_len -= 3;
1240
1241 switch (channel->band) {
1242 default:
1243 WARN_ON_ONCE(1);
1244 /* fall through */
1245 case NL80211_BAND_2GHZ:
1246 case NL80211_BAND_60GHZ:
1247 chan_increment = 1;
1248 break;
1249 case NL80211_BAND_5GHZ:
1250 chan_increment = 4;
1251 break;
1252 }
1253
1254 /* find channel */
1255 while (country_ie_len >= 3) {
1256 u8 first_channel = triplet->chans.first_channel;
1257
1258 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1259 goto next;
1260
1261 for (i = 0; i < triplet->chans.num_channels; i++) {
1262 if (first_channel + i * chan_increment == chan) {
1263 have_chan_pwr = true;
1264 *chan_pwr = triplet->chans.max_power;
1265 break;
1266 }
1267 }
1268 if (have_chan_pwr)
1269 break;
1270
1271 next:
1272 triplet++;
1273 country_ie_len -= 3;
1274 }
1275
1276 if (have_chan_pwr && pwr_constr_elem)
1277 *pwr_reduction = *pwr_constr_elem;
1278 else
1279 *pwr_reduction = 0;
1280
1281 return have_chan_pwr;
1282 }
1283
1284 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1285 struct ieee80211_channel *channel,
1286 const u8 *cisco_dtpc_ie,
1287 int *pwr_level)
1288 {
1289 /* From practical testing, the first data byte of the DTPC element
1290 * seems to contain the requested dBm level, and the CLI on Cisco
1291 * APs clearly state the range is -127 to 127 dBm, which indicates
1292 * a signed byte, although it seemingly never actually goes negative.
1293 * The other byte seems to always be zero.
1294 */
1295 *pwr_level = (__s8)cisco_dtpc_ie[4];
1296 }
1297
1298 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1299 struct ieee80211_channel *channel,
1300 struct ieee80211_mgmt *mgmt,
1301 const u8 *country_ie, u8 country_ie_len,
1302 const u8 *pwr_constr_ie,
1303 const u8 *cisco_dtpc_ie)
1304 {
1305 bool has_80211h_pwr = false, has_cisco_pwr = false;
1306 int chan_pwr = 0, pwr_reduction_80211h = 0;
1307 int pwr_level_cisco, pwr_level_80211h;
1308 int new_ap_level;
1309 __le16 capab = mgmt->u.probe_resp.capab_info;
1310
1311 if (country_ie &&
1312 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1313 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1314 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1315 sdata, channel, country_ie, country_ie_len,
1316 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1317 pwr_level_80211h =
1318 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1319 }
1320
1321 if (cisco_dtpc_ie) {
1322 ieee80211_find_cisco_dtpc(
1323 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1324 has_cisco_pwr = true;
1325 }
1326
1327 if (!has_80211h_pwr && !has_cisco_pwr)
1328 return 0;
1329
1330 /* If we have both 802.11h and Cisco DTPC, apply both limits
1331 * by picking the smallest of the two power levels advertised.
1332 */
1333 if (has_80211h_pwr &&
1334 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1335 new_ap_level = pwr_level_80211h;
1336
1337 if (sdata->ap_power_level == new_ap_level)
1338 return 0;
1339
1340 sdata_dbg(sdata,
1341 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1342 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1343 sdata->u.mgd.bssid);
1344 } else { /* has_cisco_pwr is always true here. */
1345 new_ap_level = pwr_level_cisco;
1346
1347 if (sdata->ap_power_level == new_ap_level)
1348 return 0;
1349
1350 sdata_dbg(sdata,
1351 "Limiting TX power to %d dBm as advertised by %pM\n",
1352 pwr_level_cisco, sdata->u.mgd.bssid);
1353 }
1354
1355 sdata->ap_power_level = new_ap_level;
1356 if (__ieee80211_recalc_txpower(sdata))
1357 return BSS_CHANGED_TXPOWER;
1358 return 0;
1359 }
1360
1361 /* powersave */
1362 static void ieee80211_enable_ps(struct ieee80211_local *local,
1363 struct ieee80211_sub_if_data *sdata)
1364 {
1365 struct ieee80211_conf *conf = &local->hw.conf;
1366
1367 /*
1368 * If we are scanning right now then the parameters will
1369 * take effect when scan finishes.
1370 */
1371 if (local->scanning)
1372 return;
1373
1374 if (conf->dynamic_ps_timeout > 0 &&
1375 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1376 mod_timer(&local->dynamic_ps_timer, jiffies +
1377 msecs_to_jiffies(conf->dynamic_ps_timeout));
1378 } else {
1379 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1380 ieee80211_send_nullfunc(local, sdata, true);
1381
1382 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1383 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1384 return;
1385
1386 conf->flags |= IEEE80211_CONF_PS;
1387 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1388 }
1389 }
1390
1391 static void ieee80211_change_ps(struct ieee80211_local *local)
1392 {
1393 struct ieee80211_conf *conf = &local->hw.conf;
1394
1395 if (local->ps_sdata) {
1396 ieee80211_enable_ps(local, local->ps_sdata);
1397 } else if (conf->flags & IEEE80211_CONF_PS) {
1398 conf->flags &= ~IEEE80211_CONF_PS;
1399 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1400 del_timer_sync(&local->dynamic_ps_timer);
1401 cancel_work_sync(&local->dynamic_ps_enable_work);
1402 }
1403 }
1404
1405 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1406 {
1407 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1408 struct sta_info *sta = NULL;
1409 bool authorized = false;
1410
1411 if (!mgd->powersave)
1412 return false;
1413
1414 if (mgd->broken_ap)
1415 return false;
1416
1417 if (!mgd->associated)
1418 return false;
1419
1420 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1421 return false;
1422
1423 if (!mgd->have_beacon)
1424 return false;
1425
1426 rcu_read_lock();
1427 sta = sta_info_get(sdata, mgd->bssid);
1428 if (sta)
1429 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1430 rcu_read_unlock();
1431
1432 return authorized;
1433 }
1434
1435 /* need to hold RTNL or interface lock */
1436 void ieee80211_recalc_ps(struct ieee80211_local *local)
1437 {
1438 struct ieee80211_sub_if_data *sdata, *found = NULL;
1439 int count = 0;
1440 int timeout;
1441
1442 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1443 local->ps_sdata = NULL;
1444 return;
1445 }
1446
1447 list_for_each_entry(sdata, &local->interfaces, list) {
1448 if (!ieee80211_sdata_running(sdata))
1449 continue;
1450 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1451 /* If an AP vif is found, then disable PS
1452 * by setting the count to zero thereby setting
1453 * ps_sdata to NULL.
1454 */
1455 count = 0;
1456 break;
1457 }
1458 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1459 continue;
1460 found = sdata;
1461 count++;
1462 }
1463
1464 if (count == 1 && ieee80211_powersave_allowed(found)) {
1465 u8 dtimper = found->u.mgd.dtim_period;
1466
1467 timeout = local->dynamic_ps_forced_timeout;
1468 if (timeout < 0)
1469 timeout = 100;
1470 local->hw.conf.dynamic_ps_timeout = timeout;
1471
1472 /* If the TIM IE is invalid, pretend the value is 1 */
1473 if (!dtimper)
1474 dtimper = 1;
1475
1476 local->hw.conf.ps_dtim_period = dtimper;
1477 local->ps_sdata = found;
1478 } else {
1479 local->ps_sdata = NULL;
1480 }
1481
1482 ieee80211_change_ps(local);
1483 }
1484
1485 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1486 {
1487 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1488
1489 if (sdata->vif.bss_conf.ps != ps_allowed) {
1490 sdata->vif.bss_conf.ps = ps_allowed;
1491 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1492 }
1493 }
1494
1495 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1496 {
1497 struct ieee80211_local *local =
1498 container_of(work, struct ieee80211_local,
1499 dynamic_ps_disable_work);
1500
1501 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1502 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1503 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1504 }
1505
1506 ieee80211_wake_queues_by_reason(&local->hw,
1507 IEEE80211_MAX_QUEUE_MAP,
1508 IEEE80211_QUEUE_STOP_REASON_PS,
1509 false);
1510 }
1511
1512 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1513 {
1514 struct ieee80211_local *local =
1515 container_of(work, struct ieee80211_local,
1516 dynamic_ps_enable_work);
1517 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1518 struct ieee80211_if_managed *ifmgd;
1519 unsigned long flags;
1520 int q;
1521
1522 /* can only happen when PS was just disabled anyway */
1523 if (!sdata)
1524 return;
1525
1526 ifmgd = &sdata->u.mgd;
1527
1528 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1529 return;
1530
1531 if (local->hw.conf.dynamic_ps_timeout > 0) {
1532 /* don't enter PS if TX frames are pending */
1533 if (drv_tx_frames_pending(local)) {
1534 mod_timer(&local->dynamic_ps_timer, jiffies +
1535 msecs_to_jiffies(
1536 local->hw.conf.dynamic_ps_timeout));
1537 return;
1538 }
1539
1540 /*
1541 * transmission can be stopped by others which leads to
1542 * dynamic_ps_timer expiry. Postpone the ps timer if it
1543 * is not the actual idle state.
1544 */
1545 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1546 for (q = 0; q < local->hw.queues; q++) {
1547 if (local->queue_stop_reasons[q]) {
1548 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1549 flags);
1550 mod_timer(&local->dynamic_ps_timer, jiffies +
1551 msecs_to_jiffies(
1552 local->hw.conf.dynamic_ps_timeout));
1553 return;
1554 }
1555 }
1556 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1557 }
1558
1559 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1560 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1561 if (drv_tx_frames_pending(local)) {
1562 mod_timer(&local->dynamic_ps_timer, jiffies +
1563 msecs_to_jiffies(
1564 local->hw.conf.dynamic_ps_timeout));
1565 } else {
1566 ieee80211_send_nullfunc(local, sdata, true);
1567 /* Flush to get the tx status of nullfunc frame */
1568 ieee80211_flush_queues(local, sdata, false);
1569 }
1570 }
1571
1572 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1573 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1574 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1575 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1576 local->hw.conf.flags |= IEEE80211_CONF_PS;
1577 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1578 }
1579 }
1580
1581 void ieee80211_dynamic_ps_timer(struct timer_list *t)
1582 {
1583 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1584
1585 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1586 }
1587
1588 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1589 {
1590 struct delayed_work *delayed_work = to_delayed_work(work);
1591 struct ieee80211_sub_if_data *sdata =
1592 container_of(delayed_work, struct ieee80211_sub_if_data,
1593 dfs_cac_timer_work);
1594 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1595
1596 mutex_lock(&sdata->local->mtx);
1597 if (sdata->wdev.cac_started) {
1598 ieee80211_vif_release_channel(sdata);
1599 cfg80211_cac_event(sdata->dev, &chandef,
1600 NL80211_RADAR_CAC_FINISHED,
1601 GFP_KERNEL);
1602 }
1603 mutex_unlock(&sdata->local->mtx);
1604 }
1605
1606 static bool
1607 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1608 {
1609 struct ieee80211_local *local = sdata->local;
1610 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1611 bool ret = false;
1612 int ac;
1613
1614 if (local->hw.queues < IEEE80211_NUM_ACS)
1615 return false;
1616
1617 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1618 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1619 int non_acm_ac;
1620 unsigned long now = jiffies;
1621
1622 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1623 tx_tspec->admitted_time &&
1624 time_after(now, tx_tspec->time_slice_start + HZ)) {
1625 tx_tspec->consumed_tx_time = 0;
1626 tx_tspec->time_slice_start = now;
1627
1628 if (tx_tspec->downgraded)
1629 tx_tspec->action =
1630 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1631 }
1632
1633 switch (tx_tspec->action) {
1634 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1635 /* take the original parameters */
1636 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1637 sdata_err(sdata,
1638 "failed to set TX queue parameters for queue %d\n",
1639 ac);
1640 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1641 tx_tspec->downgraded = false;
1642 ret = true;
1643 break;
1644 case TX_TSPEC_ACTION_DOWNGRADE:
1645 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1646 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1647 ret = true;
1648 break;
1649 }
1650 /* downgrade next lower non-ACM AC */
1651 for (non_acm_ac = ac + 1;
1652 non_acm_ac < IEEE80211_NUM_ACS;
1653 non_acm_ac++)
1654 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1655 break;
1656 /* Usually the loop will result in using BK even if it
1657 * requires admission control, but such a configuration
1658 * makes no sense and we have to transmit somehow - the
1659 * AC selection does the same thing.
1660 * If we started out trying to downgrade from BK, then
1661 * the extra condition here might be needed.
1662 */
1663 if (non_acm_ac >= IEEE80211_NUM_ACS)
1664 non_acm_ac = IEEE80211_AC_BK;
1665 if (drv_conf_tx(local, sdata, ac,
1666 &sdata->tx_conf[non_acm_ac]))
1667 sdata_err(sdata,
1668 "failed to set TX queue parameters for queue %d\n",
1669 ac);
1670 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1671 ret = true;
1672 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1673 tx_tspec->time_slice_start + HZ - now + 1);
1674 break;
1675 case TX_TSPEC_ACTION_NONE:
1676 /* nothing now */
1677 break;
1678 }
1679 }
1680
1681 return ret;
1682 }
1683
1684 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1685 {
1686 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1687 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1688 }
1689
1690 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1691 {
1692 struct ieee80211_sub_if_data *sdata;
1693
1694 sdata = container_of(work, struct ieee80211_sub_if_data,
1695 u.mgd.tx_tspec_wk.work);
1696 ieee80211_sta_handle_tspec_ac_params(sdata);
1697 }
1698
1699 /* MLME */
1700 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1701 struct ieee80211_sub_if_data *sdata,
1702 const u8 *wmm_param, size_t wmm_param_len)
1703 {
1704 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1705 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1706 size_t left;
1707 int count, ac;
1708 const u8 *pos;
1709 u8 uapsd_queues = 0;
1710
1711 if (!local->ops->conf_tx)
1712 return false;
1713
1714 if (local->hw.queues < IEEE80211_NUM_ACS)
1715 return false;
1716
1717 if (!wmm_param)
1718 return false;
1719
1720 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1721 return false;
1722
1723 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1724 uapsd_queues = ifmgd->uapsd_queues;
1725
1726 count = wmm_param[6] & 0x0f;
1727 if (count == ifmgd->wmm_last_param_set)
1728 return false;
1729 ifmgd->wmm_last_param_set = count;
1730
1731 pos = wmm_param + 8;
1732 left = wmm_param_len - 8;
1733
1734 memset(&params, 0, sizeof(params));
1735
1736 sdata->wmm_acm = 0;
1737 for (; left >= 4; left -= 4, pos += 4) {
1738 int aci = (pos[0] >> 5) & 0x03;
1739 int acm = (pos[0] >> 4) & 0x01;
1740 bool uapsd = false;
1741
1742 switch (aci) {
1743 case 1: /* AC_BK */
1744 ac = IEEE80211_AC_BK;
1745 if (acm)
1746 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1747 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1748 uapsd = true;
1749 break;
1750 case 2: /* AC_VI */
1751 ac = IEEE80211_AC_VI;
1752 if (acm)
1753 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1754 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1755 uapsd = true;
1756 break;
1757 case 3: /* AC_VO */
1758 ac = IEEE80211_AC_VO;
1759 if (acm)
1760 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1761 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1762 uapsd = true;
1763 break;
1764 case 0: /* AC_BE */
1765 default:
1766 ac = IEEE80211_AC_BE;
1767 if (acm)
1768 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1769 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1770 uapsd = true;
1771 break;
1772 }
1773
1774 params[ac].aifs = pos[0] & 0x0f;
1775
1776 if (params[ac].aifs < 2) {
1777 sdata_info(sdata,
1778 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1779 params[ac].aifs, aci);
1780 params[ac].aifs = 2;
1781 }
1782 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1783 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1784 params[ac].txop = get_unaligned_le16(pos + 2);
1785 params[ac].acm = acm;
1786 params[ac].uapsd = uapsd;
1787
1788 if (params[ac].cw_min > params[ac].cw_max) {
1789 sdata_info(sdata,
1790 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1791 params[ac].cw_min, params[ac].cw_max, aci);
1792 return false;
1793 }
1794 }
1795
1796 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1797 mlme_dbg(sdata,
1798 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1799 ac, params[ac].acm,
1800 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1801 params[ac].txop, params[ac].uapsd,
1802 ifmgd->tx_tspec[ac].downgraded);
1803 sdata->tx_conf[ac] = params[ac];
1804 if (!ifmgd->tx_tspec[ac].downgraded &&
1805 drv_conf_tx(local, sdata, ac, &params[ac]))
1806 sdata_err(sdata,
1807 "failed to set TX queue parameters for AC %d\n",
1808 ac);
1809 }
1810
1811 /* enable WMM or activate new settings */
1812 sdata->vif.bss_conf.qos = true;
1813 return true;
1814 }
1815
1816 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1817 {
1818 lockdep_assert_held(&sdata->local->mtx);
1819
1820 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1821 ieee80211_run_deferred_scan(sdata->local);
1822 }
1823
1824 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1825 {
1826 mutex_lock(&sdata->local->mtx);
1827 __ieee80211_stop_poll(sdata);
1828 mutex_unlock(&sdata->local->mtx);
1829 }
1830
1831 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1832 u16 capab, bool erp_valid, u8 erp)
1833 {
1834 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1835 struct ieee80211_supported_band *sband;
1836 u32 changed = 0;
1837 bool use_protection;
1838 bool use_short_preamble;
1839 bool use_short_slot;
1840
1841 sband = ieee80211_get_sband(sdata);
1842 if (!sband)
1843 return changed;
1844
1845 if (erp_valid) {
1846 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1847 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1848 } else {
1849 use_protection = false;
1850 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1851 }
1852
1853 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1854 if (sband->band == NL80211_BAND_5GHZ)
1855 use_short_slot = true;
1856
1857 if (use_protection != bss_conf->use_cts_prot) {
1858 bss_conf->use_cts_prot = use_protection;
1859 changed |= BSS_CHANGED_ERP_CTS_PROT;
1860 }
1861
1862 if (use_short_preamble != bss_conf->use_short_preamble) {
1863 bss_conf->use_short_preamble = use_short_preamble;
1864 changed |= BSS_CHANGED_ERP_PREAMBLE;
1865 }
1866
1867 if (use_short_slot != bss_conf->use_short_slot) {
1868 bss_conf->use_short_slot = use_short_slot;
1869 changed |= BSS_CHANGED_ERP_SLOT;
1870 }
1871
1872 return changed;
1873 }
1874
1875 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1876 struct cfg80211_bss *cbss,
1877 u32 bss_info_changed)
1878 {
1879 struct ieee80211_bss *bss = (void *)cbss->priv;
1880 struct ieee80211_local *local = sdata->local;
1881 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1882
1883 bss_info_changed |= BSS_CHANGED_ASSOC;
1884 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1885 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1886
1887 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1888 beacon_loss_count * bss_conf->beacon_int));
1889
1890 sdata->u.mgd.associated = cbss;
1891 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1892
1893 ieee80211_check_rate_mask(sdata);
1894
1895 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1896
1897 if (sdata->vif.p2p ||
1898 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
1899 const struct cfg80211_bss_ies *ies;
1900
1901 rcu_read_lock();
1902 ies = rcu_dereference(cbss->ies);
1903 if (ies) {
1904 int ret;
1905
1906 ret = cfg80211_get_p2p_attr(
1907 ies->data, ies->len,
1908 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1909 (u8 *) &bss_conf->p2p_noa_attr,
1910 sizeof(bss_conf->p2p_noa_attr));
1911 if (ret >= 2) {
1912 sdata->u.mgd.p2p_noa_index =
1913 bss_conf->p2p_noa_attr.index;
1914 bss_info_changed |= BSS_CHANGED_P2P_PS;
1915 }
1916 }
1917 rcu_read_unlock();
1918 }
1919
1920 /* just to be sure */
1921 ieee80211_stop_poll(sdata);
1922
1923 ieee80211_led_assoc(local, 1);
1924
1925 if (sdata->u.mgd.have_beacon) {
1926 /*
1927 * If the AP is buggy we may get here with no DTIM period
1928 * known, so assume it's 1 which is the only safe assumption
1929 * in that case, although if the TIM IE is broken powersave
1930 * probably just won't work at all.
1931 */
1932 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1933 bss_conf->beacon_rate = bss->beacon_rate;
1934 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1935 } else {
1936 bss_conf->beacon_rate = NULL;
1937 bss_conf->dtim_period = 0;
1938 }
1939
1940 bss_conf->assoc = 1;
1941
1942 /* Tell the driver to monitor connection quality (if supported) */
1943 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1944 bss_conf->cqm_rssi_thold)
1945 bss_info_changed |= BSS_CHANGED_CQM;
1946
1947 /* Enable ARP filtering */
1948 if (bss_conf->arp_addr_cnt)
1949 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1950
1951 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1952
1953 mutex_lock(&local->iflist_mtx);
1954 ieee80211_recalc_ps(local);
1955 mutex_unlock(&local->iflist_mtx);
1956
1957 ieee80211_recalc_smps(sdata);
1958 ieee80211_recalc_ps_vif(sdata);
1959
1960 netif_carrier_on(sdata->dev);
1961 }
1962
1963 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1964 u16 stype, u16 reason, bool tx,
1965 u8 *frame_buf)
1966 {
1967 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1968 struct ieee80211_local *local = sdata->local;
1969 u32 changed = 0;
1970
1971 sdata_assert_lock(sdata);
1972
1973 if (WARN_ON_ONCE(tx && !frame_buf))
1974 return;
1975
1976 if (WARN_ON(!ifmgd->associated))
1977 return;
1978
1979 ieee80211_stop_poll(sdata);
1980
1981 ifmgd->associated = NULL;
1982 netif_carrier_off(sdata->dev);
1983
1984 /*
1985 * if we want to get out of ps before disassoc (why?) we have
1986 * to do it before sending disassoc, as otherwise the null-packet
1987 * won't be valid.
1988 */
1989 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1990 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1991 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1992 }
1993 local->ps_sdata = NULL;
1994
1995 /* disable per-vif ps */
1996 ieee80211_recalc_ps_vif(sdata);
1997
1998 /* make sure ongoing transmission finishes */
1999 synchronize_net();
2000
2001 /*
2002 * drop any frame before deauth/disassoc, this can be data or
2003 * management frame. Since we are disconnecting, we should not
2004 * insist sending these frames which can take time and delay
2005 * the disconnection and possible the roaming.
2006 */
2007 if (tx)
2008 ieee80211_flush_queues(local, sdata, true);
2009
2010 /* deauthenticate/disassociate now */
2011 if (tx || frame_buf)
2012 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2013 reason, tx, frame_buf);
2014
2015 /* flush out frame - make sure the deauth was actually sent */
2016 if (tx)
2017 ieee80211_flush_queues(local, sdata, false);
2018
2019 /* clear bssid only after building the needed mgmt frames */
2020 eth_zero_addr(ifmgd->bssid);
2021
2022 /* remove AP and TDLS peers */
2023 sta_info_flush(sdata);
2024
2025 /* finally reset all BSS / config parameters */
2026 changed |= ieee80211_reset_erp_info(sdata);
2027
2028 ieee80211_led_assoc(local, 0);
2029 changed |= BSS_CHANGED_ASSOC;
2030 sdata->vif.bss_conf.assoc = false;
2031
2032 ifmgd->p2p_noa_index = -1;
2033 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2034 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2035
2036 /* on the next assoc, re-program HT/VHT parameters */
2037 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2038 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2039 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2040 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2041
2042 /* reset MU-MIMO ownership and group data */
2043 memset(sdata->vif.bss_conf.mu_group.membership, 0,
2044 sizeof(sdata->vif.bss_conf.mu_group.membership));
2045 memset(sdata->vif.bss_conf.mu_group.position, 0,
2046 sizeof(sdata->vif.bss_conf.mu_group.position));
2047 changed |= BSS_CHANGED_MU_GROUPS;
2048 sdata->vif.mu_mimo_owner = false;
2049
2050 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2051
2052 del_timer_sync(&local->dynamic_ps_timer);
2053 cancel_work_sync(&local->dynamic_ps_enable_work);
2054
2055 /* Disable ARP filtering */
2056 if (sdata->vif.bss_conf.arp_addr_cnt)
2057 changed |= BSS_CHANGED_ARP_FILTER;
2058
2059 sdata->vif.bss_conf.qos = false;
2060 changed |= BSS_CHANGED_QOS;
2061
2062 /* The BSSID (not really interesting) and HT changed */
2063 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2064 ieee80211_bss_info_change_notify(sdata, changed);
2065
2066 /* disassociated - set to defaults now */
2067 ieee80211_set_wmm_default(sdata, false, false);
2068
2069 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2070 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2071 del_timer_sync(&sdata->u.mgd.timer);
2072 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2073
2074 sdata->vif.bss_conf.dtim_period = 0;
2075 sdata->vif.bss_conf.beacon_rate = NULL;
2076
2077 ifmgd->have_beacon = false;
2078
2079 ifmgd->flags = 0;
2080 mutex_lock(&local->mtx);
2081 ieee80211_vif_release_channel(sdata);
2082
2083 sdata->vif.csa_active = false;
2084 ifmgd->csa_waiting_bcn = false;
2085 ifmgd->csa_ignored_same_chan = false;
2086 if (sdata->csa_block_tx) {
2087 ieee80211_wake_vif_queues(local, sdata,
2088 IEEE80211_QUEUE_STOP_REASON_CSA);
2089 sdata->csa_block_tx = false;
2090 }
2091 mutex_unlock(&local->mtx);
2092
2093 /* existing TX TSPEC sessions no longer exist */
2094 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2095 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2096
2097 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2098 }
2099
2100 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2101 struct ieee80211_hdr *hdr)
2102 {
2103 /*
2104 * We can postpone the mgd.timer whenever receiving unicast frames
2105 * from AP because we know that the connection is working both ways
2106 * at that time. But multicast frames (and hence also beacons) must
2107 * be ignored here, because we need to trigger the timer during
2108 * data idle periods for sending the periodic probe request to the
2109 * AP we're connected to.
2110 */
2111 if (is_multicast_ether_addr(hdr->addr1))
2112 return;
2113
2114 ieee80211_sta_reset_conn_monitor(sdata);
2115 }
2116
2117 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2118 {
2119 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2120 struct ieee80211_local *local = sdata->local;
2121
2122 mutex_lock(&local->mtx);
2123 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2124 goto out;
2125
2126 __ieee80211_stop_poll(sdata);
2127
2128 mutex_lock(&local->iflist_mtx);
2129 ieee80211_recalc_ps(local);
2130 mutex_unlock(&local->iflist_mtx);
2131
2132 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2133 goto out;
2134
2135 /*
2136 * We've received a probe response, but are not sure whether
2137 * we have or will be receiving any beacons or data, so let's
2138 * schedule the timers again, just in case.
2139 */
2140 ieee80211_sta_reset_beacon_monitor(sdata);
2141
2142 mod_timer(&ifmgd->conn_mon_timer,
2143 round_jiffies_up(jiffies +
2144 IEEE80211_CONNECTION_IDLE_TIME));
2145 out:
2146 mutex_unlock(&local->mtx);
2147 }
2148
2149 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2150 struct ieee80211_hdr *hdr,
2151 u16 tx_time)
2152 {
2153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2154 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2155 int ac = ieee80211_ac_from_tid(tid);
2156 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2157 unsigned long now = jiffies;
2158
2159 if (likely(!tx_tspec->admitted_time))
2160 return;
2161
2162 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2163 tx_tspec->consumed_tx_time = 0;
2164 tx_tspec->time_slice_start = now;
2165
2166 if (tx_tspec->downgraded) {
2167 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2168 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2169 }
2170 }
2171
2172 if (tx_tspec->downgraded)
2173 return;
2174
2175 tx_tspec->consumed_tx_time += tx_time;
2176
2177 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2178 tx_tspec->downgraded = true;
2179 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2180 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2181 }
2182 }
2183
2184 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2185 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2186 {
2187 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2188
2189 if (!ieee80211_is_data(hdr->frame_control))
2190 return;
2191
2192 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2193 sdata->u.mgd.probe_send_count > 0) {
2194 if (ack)
2195 ieee80211_sta_reset_conn_monitor(sdata);
2196 else
2197 sdata->u.mgd.nullfunc_failed = true;
2198 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2199 return;
2200 }
2201
2202 if (ack)
2203 ieee80211_sta_reset_conn_monitor(sdata);
2204 }
2205
2206 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2207 {
2208 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2209 const u8 *ssid;
2210 u8 *dst = ifmgd->associated->bssid;
2211 u8 unicast_limit = max(1, max_probe_tries - 3);
2212 struct sta_info *sta;
2213
2214 /*
2215 * Try sending broadcast probe requests for the last three
2216 * probe requests after the first ones failed since some
2217 * buggy APs only support broadcast probe requests.
2218 */
2219 if (ifmgd->probe_send_count >= unicast_limit)
2220 dst = NULL;
2221
2222 /*
2223 * When the hardware reports an accurate Tx ACK status, it's
2224 * better to send a nullfunc frame instead of a probe request,
2225 * as it will kick us off the AP quickly if we aren't associated
2226 * anymore. The timeout will be reset if the frame is ACKed by
2227 * the AP.
2228 */
2229 ifmgd->probe_send_count++;
2230
2231 if (dst) {
2232 mutex_lock(&sdata->local->sta_mtx);
2233 sta = sta_info_get(sdata, dst);
2234 if (!WARN_ON(!sta))
2235 ieee80211_check_fast_rx(sta);
2236 mutex_unlock(&sdata->local->sta_mtx);
2237 }
2238
2239 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2240 ifmgd->nullfunc_failed = false;
2241 ieee80211_send_nullfunc(sdata->local, sdata, false);
2242 } else {
2243 int ssid_len;
2244
2245 rcu_read_lock();
2246 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2247 if (WARN_ON_ONCE(ssid == NULL))
2248 ssid_len = 0;
2249 else
2250 ssid_len = ssid[1];
2251
2252 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2253 ssid + 2, ssid_len, NULL,
2254 0, (u32) -1, true, 0,
2255 ifmgd->associated->channel, false);
2256 rcu_read_unlock();
2257 }
2258
2259 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2260 run_again(sdata, ifmgd->probe_timeout);
2261 }
2262
2263 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2264 bool beacon)
2265 {
2266 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2267 bool already = false;
2268
2269 if (!ieee80211_sdata_running(sdata))
2270 return;
2271
2272 sdata_lock(sdata);
2273
2274 if (!ifmgd->associated)
2275 goto out;
2276
2277 mutex_lock(&sdata->local->mtx);
2278
2279 if (sdata->local->tmp_channel || sdata->local->scanning) {
2280 mutex_unlock(&sdata->local->mtx);
2281 goto out;
2282 }
2283
2284 if (beacon) {
2285 mlme_dbg_ratelimited(sdata,
2286 "detected beacon loss from AP (missed %d beacons) - probing\n",
2287 beacon_loss_count);
2288
2289 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2290 }
2291
2292 /*
2293 * The driver/our work has already reported this event or the
2294 * connection monitoring has kicked in and we have already sent
2295 * a probe request. Or maybe the AP died and the driver keeps
2296 * reporting until we disassociate...
2297 *
2298 * In either case we have to ignore the current call to this
2299 * function (except for setting the correct probe reason bit)
2300 * because otherwise we would reset the timer every time and
2301 * never check whether we received a probe response!
2302 */
2303 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2304 already = true;
2305
2306 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2307
2308 mutex_unlock(&sdata->local->mtx);
2309
2310 if (already)
2311 goto out;
2312
2313 mutex_lock(&sdata->local->iflist_mtx);
2314 ieee80211_recalc_ps(sdata->local);
2315 mutex_unlock(&sdata->local->iflist_mtx);
2316
2317 ifmgd->probe_send_count = 0;
2318 ieee80211_mgd_probe_ap_send(sdata);
2319 out:
2320 sdata_unlock(sdata);
2321 }
2322
2323 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2324 struct ieee80211_vif *vif)
2325 {
2326 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2327 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2328 struct cfg80211_bss *cbss;
2329 struct sk_buff *skb;
2330 const u8 *ssid;
2331 int ssid_len;
2332
2333 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2334 return NULL;
2335
2336 sdata_assert_lock(sdata);
2337
2338 if (ifmgd->associated)
2339 cbss = ifmgd->associated;
2340 else if (ifmgd->auth_data)
2341 cbss = ifmgd->auth_data->bss;
2342 else if (ifmgd->assoc_data)
2343 cbss = ifmgd->assoc_data->bss;
2344 else
2345 return NULL;
2346
2347 rcu_read_lock();
2348 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2349 if (WARN_ON_ONCE(ssid == NULL))
2350 ssid_len = 0;
2351 else
2352 ssid_len = ssid[1];
2353
2354 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2355 (u32) -1, cbss->channel,
2356 ssid + 2, ssid_len,
2357 NULL, 0, true);
2358 rcu_read_unlock();
2359
2360 return skb;
2361 }
2362 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2363
2364 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2365 const u8 *buf, size_t len, bool tx,
2366 u16 reason)
2367 {
2368 struct ieee80211_event event = {
2369 .type = MLME_EVENT,
2370 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2371 .u.mlme.reason = reason,
2372 };
2373
2374 if (tx)
2375 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2376 else
2377 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2378
2379 drv_event_callback(sdata->local, sdata, &event);
2380 }
2381
2382 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2383 {
2384 struct ieee80211_local *local = sdata->local;
2385 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2386 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2387
2388 sdata_lock(sdata);
2389 if (!ifmgd->associated) {
2390 sdata_unlock(sdata);
2391 return;
2392 }
2393
2394 /* AP is probably out of range (or not reachable for another reason) so
2395 * remove the bss struct for that AP.
2396 */
2397 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2398
2399 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2400 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2401 true, frame_buf);
2402 mutex_lock(&local->mtx);
2403 sdata->vif.csa_active = false;
2404 ifmgd->csa_waiting_bcn = false;
2405 if (sdata->csa_block_tx) {
2406 ieee80211_wake_vif_queues(local, sdata,
2407 IEEE80211_QUEUE_STOP_REASON_CSA);
2408 sdata->csa_block_tx = false;
2409 }
2410 mutex_unlock(&local->mtx);
2411
2412 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2413 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2414
2415 sdata_unlock(sdata);
2416 }
2417
2418 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2419 {
2420 struct ieee80211_sub_if_data *sdata =
2421 container_of(work, struct ieee80211_sub_if_data,
2422 u.mgd.beacon_connection_loss_work);
2423 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2424
2425 if (ifmgd->associated)
2426 ifmgd->beacon_loss_count++;
2427
2428 if (ifmgd->connection_loss) {
2429 sdata_info(sdata, "Connection to AP %pM lost\n",
2430 ifmgd->bssid);
2431 __ieee80211_disconnect(sdata);
2432 } else {
2433 ieee80211_mgd_probe_ap(sdata, true);
2434 }
2435 }
2436
2437 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2438 {
2439 struct ieee80211_sub_if_data *sdata =
2440 container_of(work, struct ieee80211_sub_if_data,
2441 u.mgd.csa_connection_drop_work);
2442
2443 __ieee80211_disconnect(sdata);
2444 }
2445
2446 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2447 {
2448 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2449 struct ieee80211_hw *hw = &sdata->local->hw;
2450
2451 trace_api_beacon_loss(sdata);
2452
2453 sdata->u.mgd.connection_loss = false;
2454 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2455 }
2456 EXPORT_SYMBOL(ieee80211_beacon_loss);
2457
2458 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2459 {
2460 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2461 struct ieee80211_hw *hw = &sdata->local->hw;
2462
2463 trace_api_connection_loss(sdata);
2464
2465 sdata->u.mgd.connection_loss = true;
2466 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2467 }
2468 EXPORT_SYMBOL(ieee80211_connection_loss);
2469
2470
2471 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2472 bool assoc)
2473 {
2474 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2475
2476 sdata_assert_lock(sdata);
2477
2478 if (!assoc) {
2479 /*
2480 * we are not authenticated yet, the only timer that could be
2481 * running is the timeout for the authentication response which
2482 * which is not relevant anymore.
2483 */
2484 del_timer_sync(&sdata->u.mgd.timer);
2485 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2486
2487 eth_zero_addr(sdata->u.mgd.bssid);
2488 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2489 sdata->u.mgd.flags = 0;
2490 mutex_lock(&sdata->local->mtx);
2491 ieee80211_vif_release_channel(sdata);
2492 mutex_unlock(&sdata->local->mtx);
2493 }
2494
2495 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2496 kfree(auth_data);
2497 sdata->u.mgd.auth_data = NULL;
2498 }
2499
2500 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2501 bool assoc, bool abandon)
2502 {
2503 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2504
2505 sdata_assert_lock(sdata);
2506
2507 if (!assoc) {
2508 /*
2509 * we are not associated yet, the only timer that could be
2510 * running is the timeout for the association response which
2511 * which is not relevant anymore.
2512 */
2513 del_timer_sync(&sdata->u.mgd.timer);
2514 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2515
2516 eth_zero_addr(sdata->u.mgd.bssid);
2517 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2518 sdata->u.mgd.flags = 0;
2519 sdata->vif.mu_mimo_owner = false;
2520
2521 mutex_lock(&sdata->local->mtx);
2522 ieee80211_vif_release_channel(sdata);
2523 mutex_unlock(&sdata->local->mtx);
2524
2525 if (abandon)
2526 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2527 }
2528
2529 kfree(assoc_data);
2530 sdata->u.mgd.assoc_data = NULL;
2531 }
2532
2533 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2534 struct ieee80211_mgmt *mgmt, size_t len)
2535 {
2536 struct ieee80211_local *local = sdata->local;
2537 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2538 u8 *pos;
2539 struct ieee802_11_elems elems;
2540 u32 tx_flags = 0;
2541
2542 pos = mgmt->u.auth.variable;
2543 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2544 if (!elems.challenge)
2545 return;
2546 auth_data->expected_transaction = 4;
2547 drv_mgd_prepare_tx(sdata->local, sdata);
2548 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2549 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2550 IEEE80211_TX_INTFL_MLME_CONN_TX;
2551 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2552 elems.challenge - 2, elems.challenge_len + 2,
2553 auth_data->bss->bssid, auth_data->bss->bssid,
2554 auth_data->key, auth_data->key_len,
2555 auth_data->key_idx, tx_flags);
2556 }
2557
2558 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2559 struct ieee80211_mgmt *mgmt, size_t len)
2560 {
2561 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2562 u8 bssid[ETH_ALEN];
2563 u16 auth_alg, auth_transaction, status_code;
2564 struct sta_info *sta;
2565 struct ieee80211_event event = {
2566 .type = MLME_EVENT,
2567 .u.mlme.data = AUTH_EVENT,
2568 };
2569
2570 sdata_assert_lock(sdata);
2571
2572 if (len < 24 + 6)
2573 return;
2574
2575 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2576 return;
2577
2578 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2579
2580 if (!ether_addr_equal(bssid, mgmt->bssid))
2581 return;
2582
2583 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2584 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2585 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2586
2587 if (auth_alg != ifmgd->auth_data->algorithm ||
2588 auth_transaction != ifmgd->auth_data->expected_transaction) {
2589 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2590 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2591 auth_transaction,
2592 ifmgd->auth_data->expected_transaction);
2593 return;
2594 }
2595
2596 if (status_code != WLAN_STATUS_SUCCESS) {
2597 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2598 mgmt->sa, status_code);
2599 ieee80211_destroy_auth_data(sdata, false);
2600 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2601 event.u.mlme.status = MLME_DENIED;
2602 event.u.mlme.reason = status_code;
2603 drv_event_callback(sdata->local, sdata, &event);
2604 return;
2605 }
2606
2607 switch (ifmgd->auth_data->algorithm) {
2608 case WLAN_AUTH_OPEN:
2609 case WLAN_AUTH_LEAP:
2610 case WLAN_AUTH_FT:
2611 case WLAN_AUTH_SAE:
2612 case WLAN_AUTH_FILS_SK:
2613 case WLAN_AUTH_FILS_SK_PFS:
2614 case WLAN_AUTH_FILS_PK:
2615 break;
2616 case WLAN_AUTH_SHARED_KEY:
2617 if (ifmgd->auth_data->expected_transaction != 4) {
2618 ieee80211_auth_challenge(sdata, mgmt, len);
2619 /* need another frame */
2620 return;
2621 }
2622 break;
2623 default:
2624 WARN_ONCE(1, "invalid auth alg %d",
2625 ifmgd->auth_data->algorithm);
2626 return;
2627 }
2628
2629 event.u.mlme.status = MLME_SUCCESS;
2630 drv_event_callback(sdata->local, sdata, &event);
2631 sdata_info(sdata, "authenticated\n");
2632 ifmgd->auth_data->done = true;
2633 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2634 ifmgd->auth_data->timeout_started = true;
2635 run_again(sdata, ifmgd->auth_data->timeout);
2636
2637 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2638 ifmgd->auth_data->expected_transaction != 2) {
2639 /*
2640 * Report auth frame to user space for processing since another
2641 * round of Authentication frames is still needed.
2642 */
2643 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2644 return;
2645 }
2646
2647 /* move station state to auth */
2648 mutex_lock(&sdata->local->sta_mtx);
2649 sta = sta_info_get(sdata, bssid);
2650 if (!sta) {
2651 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2652 goto out_err;
2653 }
2654 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2655 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2656 goto out_err;
2657 }
2658 mutex_unlock(&sdata->local->sta_mtx);
2659
2660 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2661 return;
2662 out_err:
2663 mutex_unlock(&sdata->local->sta_mtx);
2664 /* ignore frame -- wait for timeout */
2665 }
2666
2667 #define case_WLAN(type) \
2668 case WLAN_REASON_##type: return #type
2669
2670 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2671 {
2672 switch (reason_code) {
2673 case_WLAN(UNSPECIFIED);
2674 case_WLAN(PREV_AUTH_NOT_VALID);
2675 case_WLAN(DEAUTH_LEAVING);
2676 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2677 case_WLAN(DISASSOC_AP_BUSY);
2678 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2679 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2680 case_WLAN(DISASSOC_STA_HAS_LEFT);
2681 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2682 case_WLAN(DISASSOC_BAD_POWER);
2683 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2684 case_WLAN(INVALID_IE);
2685 case_WLAN(MIC_FAILURE);
2686 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2687 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2688 case_WLAN(IE_DIFFERENT);
2689 case_WLAN(INVALID_GROUP_CIPHER);
2690 case_WLAN(INVALID_PAIRWISE_CIPHER);
2691 case_WLAN(INVALID_AKMP);
2692 case_WLAN(UNSUPP_RSN_VERSION);
2693 case_WLAN(INVALID_RSN_IE_CAP);
2694 case_WLAN(IEEE8021X_FAILED);
2695 case_WLAN(CIPHER_SUITE_REJECTED);
2696 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2697 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2698 case_WLAN(DISASSOC_LOW_ACK);
2699 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2700 case_WLAN(QSTA_LEAVE_QBSS);
2701 case_WLAN(QSTA_NOT_USE);
2702 case_WLAN(QSTA_REQUIRE_SETUP);
2703 case_WLAN(QSTA_TIMEOUT);
2704 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2705 case_WLAN(MESH_PEER_CANCELED);
2706 case_WLAN(MESH_MAX_PEERS);
2707 case_WLAN(MESH_CONFIG);
2708 case_WLAN(MESH_CLOSE);
2709 case_WLAN(MESH_MAX_RETRIES);
2710 case_WLAN(MESH_CONFIRM_TIMEOUT);
2711 case_WLAN(MESH_INVALID_GTK);
2712 case_WLAN(MESH_INCONSISTENT_PARAM);
2713 case_WLAN(MESH_INVALID_SECURITY);
2714 case_WLAN(MESH_PATH_ERROR);
2715 case_WLAN(MESH_PATH_NOFORWARD);
2716 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2717 case_WLAN(MAC_EXISTS_IN_MBSS);
2718 case_WLAN(MESH_CHAN_REGULATORY);
2719 case_WLAN(MESH_CHAN);
2720 default: return "<unknown>";
2721 }
2722 }
2723
2724 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2725 struct ieee80211_mgmt *mgmt, size_t len)
2726 {
2727 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2728 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2729
2730 sdata_assert_lock(sdata);
2731
2732 if (len < 24 + 2)
2733 return;
2734
2735 if (ifmgd->associated &&
2736 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2737 const u8 *bssid = ifmgd->associated->bssid;
2738
2739 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2740 bssid, reason_code,
2741 ieee80211_get_reason_code_string(reason_code));
2742
2743 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2744
2745 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2746 reason_code);
2747 return;
2748 }
2749
2750 if (ifmgd->assoc_data &&
2751 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2752 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2753
2754 sdata_info(sdata,
2755 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2756 bssid, reason_code,
2757 ieee80211_get_reason_code_string(reason_code));
2758
2759 ieee80211_destroy_assoc_data(sdata, false, true);
2760
2761 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2762 return;
2763 }
2764 }
2765
2766
2767 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2768 struct ieee80211_mgmt *mgmt, size_t len)
2769 {
2770 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2771 u16 reason_code;
2772
2773 sdata_assert_lock(sdata);
2774
2775 if (len < 24 + 2)
2776 return;
2777
2778 if (!ifmgd->associated ||
2779 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2780 return;
2781
2782 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2783
2784 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
2785 mgmt->sa, reason_code,
2786 ieee80211_get_reason_code_string(reason_code));
2787
2788 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2789
2790 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2791 }
2792
2793 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2794 u8 *supp_rates, unsigned int supp_rates_len,
2795 u32 *rates, u32 *basic_rates,
2796 bool *have_higher_than_11mbit,
2797 int *min_rate, int *min_rate_index,
2798 int shift)
2799 {
2800 int i, j;
2801
2802 for (i = 0; i < supp_rates_len; i++) {
2803 int rate = supp_rates[i] & 0x7f;
2804 bool is_basic = !!(supp_rates[i] & 0x80);
2805
2806 if ((rate * 5 * (1 << shift)) > 110)
2807 *have_higher_than_11mbit = true;
2808
2809 /*
2810 * Skip HT and VHT BSS membership selectors since they're not
2811 * rates.
2812 *
2813 * Note: Even though the membership selector and the basic
2814 * rate flag share the same bit, they are not exactly
2815 * the same.
2816 */
2817 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
2818 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
2819 continue;
2820
2821 for (j = 0; j < sband->n_bitrates; j++) {
2822 struct ieee80211_rate *br;
2823 int brate;
2824
2825 br = &sband->bitrates[j];
2826
2827 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2828 if (brate == rate) {
2829 *rates |= BIT(j);
2830 if (is_basic)
2831 *basic_rates |= BIT(j);
2832 if ((rate * 5) < *min_rate) {
2833 *min_rate = rate * 5;
2834 *min_rate_index = j;
2835 }
2836 break;
2837 }
2838 }
2839 }
2840 }
2841
2842 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2843 struct cfg80211_bss *cbss,
2844 struct ieee80211_mgmt *mgmt, size_t len)
2845 {
2846 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2847 struct ieee80211_local *local = sdata->local;
2848 struct ieee80211_supported_band *sband;
2849 struct sta_info *sta;
2850 u8 *pos;
2851 u16 capab_info, aid;
2852 struct ieee802_11_elems elems;
2853 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2854 const struct cfg80211_bss_ies *bss_ies = NULL;
2855 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2856 u32 changed = 0;
2857 int err;
2858 bool ret;
2859
2860 /* AssocResp and ReassocResp have identical structure */
2861
2862 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2863 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2864
2865 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2866 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2867 aid);
2868 aid &= ~(BIT(15) | BIT(14));
2869
2870 ifmgd->broken_ap = false;
2871
2872 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2873 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2874 aid);
2875 aid = 0;
2876 ifmgd->broken_ap = true;
2877 }
2878
2879 pos = mgmt->u.assoc_resp.variable;
2880 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2881
2882 if (!elems.supp_rates) {
2883 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2884 return false;
2885 }
2886
2887 ifmgd->aid = aid;
2888 ifmgd->tdls_chan_switch_prohibited =
2889 elems.ext_capab && elems.ext_capab_len >= 5 &&
2890 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2891
2892 /*
2893 * Some APs are erroneously not including some information in their
2894 * (re)association response frames. Try to recover by using the data
2895 * from the beacon or probe response. This seems to afflict mobile
2896 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2897 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2898 */
2899 if ((assoc_data->wmm && !elems.wmm_param) ||
2900 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2901 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2902 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2903 (!elems.vht_cap_elem || !elems.vht_operation))) {
2904 const struct cfg80211_bss_ies *ies;
2905 struct ieee802_11_elems bss_elems;
2906
2907 rcu_read_lock();
2908 ies = rcu_dereference(cbss->ies);
2909 if (ies)
2910 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2911 GFP_ATOMIC);
2912 rcu_read_unlock();
2913 if (!bss_ies)
2914 return false;
2915
2916 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2917 false, &bss_elems);
2918 if (assoc_data->wmm &&
2919 !elems.wmm_param && bss_elems.wmm_param) {
2920 elems.wmm_param = bss_elems.wmm_param;
2921 sdata_info(sdata,
2922 "AP bug: WMM param missing from AssocResp\n");
2923 }
2924
2925 /*
2926 * Also check if we requested HT/VHT, otherwise the AP doesn't
2927 * have to include the IEs in the (re)association response.
2928 */
2929 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2930 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2931 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2932 sdata_info(sdata,
2933 "AP bug: HT capability missing from AssocResp\n");
2934 }
2935 if (!elems.ht_operation && bss_elems.ht_operation &&
2936 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2937 elems.ht_operation = bss_elems.ht_operation;
2938 sdata_info(sdata,
2939 "AP bug: HT operation missing from AssocResp\n");
2940 }
2941 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2942 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2943 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2944 sdata_info(sdata,
2945 "AP bug: VHT capa missing from AssocResp\n");
2946 }
2947 if (!elems.vht_operation && bss_elems.vht_operation &&
2948 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2949 elems.vht_operation = bss_elems.vht_operation;
2950 sdata_info(sdata,
2951 "AP bug: VHT operation missing from AssocResp\n");
2952 }
2953 }
2954
2955 /*
2956 * We previously checked these in the beacon/probe response, so
2957 * they should be present here. This is just a safety net.
2958 */
2959 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2960 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2961 sdata_info(sdata,
2962 "HT AP is missing WMM params or HT capability/operation\n");
2963 ret = false;
2964 goto out;
2965 }
2966
2967 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2968 (!elems.vht_cap_elem || !elems.vht_operation)) {
2969 sdata_info(sdata,
2970 "VHT AP is missing VHT capability/operation\n");
2971 ret = false;
2972 goto out;
2973 }
2974
2975 mutex_lock(&sdata->local->sta_mtx);
2976 /*
2977 * station info was already allocated and inserted before
2978 * the association and should be available to us
2979 */
2980 sta = sta_info_get(sdata, cbss->bssid);
2981 if (WARN_ON(!sta)) {
2982 mutex_unlock(&sdata->local->sta_mtx);
2983 ret = false;
2984 goto out;
2985 }
2986
2987 sband = ieee80211_get_sband(sdata);
2988 if (!sband) {
2989 mutex_unlock(&sdata->local->sta_mtx);
2990 ret = false;
2991 goto out;
2992 }
2993
2994 /* Set up internal HT/VHT capabilities */
2995 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2996 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2997 elems.ht_cap_elem, sta);
2998
2999 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3000 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3001 elems.vht_cap_elem, sta);
3002
3003 /*
3004 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3005 * in their association response, so ignore that data for our own
3006 * configuration. If it changed since the last beacon, we'll get the
3007 * next beacon and update then.
3008 */
3009
3010 /*
3011 * If an operating mode notification IE is present, override the
3012 * NSS calculation (that would be done in rate_control_rate_init())
3013 * and use the # of streams from that element.
3014 */
3015 if (elems.opmode_notif &&
3016 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3017 u8 nss;
3018
3019 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3020 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3021 nss += 1;
3022 sta->sta.rx_nss = nss;
3023 }
3024
3025 rate_control_rate_init(sta);
3026
3027 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3028 set_sta_flag(sta, WLAN_STA_MFP);
3029 sta->sta.mfp = true;
3030 } else {
3031 sta->sta.mfp = false;
3032 }
3033
3034 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3035
3036 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3037 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3038 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3039 if (err) {
3040 sdata_info(sdata,
3041 "failed to move station %pM to desired state\n",
3042 sta->sta.addr);
3043 WARN_ON(__sta_info_destroy(sta));
3044 mutex_unlock(&sdata->local->sta_mtx);
3045 ret = false;
3046 goto out;
3047 }
3048
3049 mutex_unlock(&sdata->local->sta_mtx);
3050
3051 /*
3052 * Always handle WMM once after association regardless
3053 * of the first value the AP uses. Setting -1 here has
3054 * that effect because the AP values is an unsigned
3055 * 4-bit value.
3056 */
3057 ifmgd->wmm_last_param_set = -1;
3058
3059 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3060 ieee80211_set_wmm_default(sdata, false, false);
3061 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3062 elems.wmm_param_len)) {
3063 /* still enable QoS since we might have HT/VHT */
3064 ieee80211_set_wmm_default(sdata, false, true);
3065 /* set the disable-WMM flag in this case to disable
3066 * tracking WMM parameter changes in the beacon if
3067 * the parameters weren't actually valid. Doing so
3068 * avoids changing parameters very strangely when
3069 * the AP is going back and forth between valid and
3070 * invalid parameters.
3071 */
3072 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3073 }
3074 changed |= BSS_CHANGED_QOS;
3075
3076 if (elems.max_idle_period_ie) {
3077 bss_conf->max_idle_period =
3078 le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
3079 bss_conf->protected_keep_alive =
3080 !!(elems.max_idle_period_ie->idle_options &
3081 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3082 changed |= BSS_CHANGED_KEEP_ALIVE;
3083 } else {
3084 bss_conf->max_idle_period = 0;
3085 bss_conf->protected_keep_alive = false;
3086 }
3087
3088 /* set AID and assoc capability,
3089 * ieee80211_set_associated() will tell the driver */
3090 bss_conf->aid = aid;
3091 bss_conf->assoc_capability = capab_info;
3092 ieee80211_set_associated(sdata, cbss, changed);
3093
3094 /*
3095 * If we're using 4-addr mode, let the AP know that we're
3096 * doing so, so that it can create the STA VLAN on its side
3097 */
3098 if (ifmgd->use_4addr)
3099 ieee80211_send_4addr_nullfunc(local, sdata);
3100
3101 /*
3102 * Start timer to probe the connection to the AP now.
3103 * Also start the timer that will detect beacon loss.
3104 */
3105 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3106 ieee80211_sta_reset_beacon_monitor(sdata);
3107
3108 ret = true;
3109 out:
3110 kfree(bss_ies);
3111 return ret;
3112 }
3113
3114 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3115 struct ieee80211_mgmt *mgmt,
3116 size_t len)
3117 {
3118 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3119 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3120 u16 capab_info, status_code, aid;
3121 struct ieee802_11_elems elems;
3122 int ac, uapsd_queues = -1;
3123 u8 *pos;
3124 bool reassoc;
3125 struct cfg80211_bss *bss;
3126 struct ieee80211_event event = {
3127 .type = MLME_EVENT,
3128 .u.mlme.data = ASSOC_EVENT,
3129 };
3130
3131 sdata_assert_lock(sdata);
3132
3133 if (!assoc_data)
3134 return;
3135 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3136 return;
3137
3138 /*
3139 * AssocResp and ReassocResp have identical structure, so process both
3140 * of them in this function.
3141 */
3142
3143 if (len < 24 + 6)
3144 return;
3145
3146 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
3147 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3148 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3149 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3150
3151 sdata_info(sdata,
3152 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3153 reassoc ? "Rea" : "A", mgmt->sa,
3154 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3155
3156 if (assoc_data->fils_kek_len &&
3157 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3158 return;
3159
3160 pos = mgmt->u.assoc_resp.variable;
3161 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3162
3163 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3164 elems.timeout_int &&
3165 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3166 u32 tu, ms;
3167 tu = le32_to_cpu(elems.timeout_int->value);
3168 ms = tu * 1024 / 1000;
3169 sdata_info(sdata,
3170 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3171 mgmt->sa, tu, ms);
3172 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3173 assoc_data->timeout_started = true;
3174 if (ms > IEEE80211_ASSOC_TIMEOUT)
3175 run_again(sdata, assoc_data->timeout);
3176 return;
3177 }
3178
3179 bss = assoc_data->bss;
3180
3181 if (status_code != WLAN_STATUS_SUCCESS) {
3182 sdata_info(sdata, "%pM denied association (code=%d)\n",
3183 mgmt->sa, status_code);
3184 ieee80211_destroy_assoc_data(sdata, false, false);
3185 event.u.mlme.status = MLME_DENIED;
3186 event.u.mlme.reason = status_code;
3187 drv_event_callback(sdata->local, sdata, &event);
3188 } else {
3189 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3190 /* oops -- internal error -- send timeout for now */
3191 ieee80211_destroy_assoc_data(sdata, false, false);
3192 cfg80211_assoc_timeout(sdata->dev, bss);
3193 return;
3194 }
3195 event.u.mlme.status = MLME_SUCCESS;
3196 drv_event_callback(sdata->local, sdata, &event);
3197 sdata_info(sdata, "associated\n");
3198
3199 /*
3200 * destroy assoc_data afterwards, as otherwise an idle
3201 * recalc after assoc_data is NULL but before associated
3202 * is set can cause the interface to go idle
3203 */
3204 ieee80211_destroy_assoc_data(sdata, true, false);
3205
3206 /* get uapsd queues configuration */
3207 uapsd_queues = 0;
3208 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3209 if (sdata->tx_conf[ac].uapsd)
3210 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3211 }
3212
3213 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3214 }
3215
3216 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3217 struct ieee80211_mgmt *mgmt, size_t len,
3218 struct ieee80211_rx_status *rx_status,
3219 struct ieee802_11_elems *elems)
3220 {
3221 struct ieee80211_local *local = sdata->local;
3222 struct ieee80211_bss *bss;
3223 struct ieee80211_channel *channel;
3224
3225 sdata_assert_lock(sdata);
3226
3227 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3228 if (!channel)
3229 return;
3230
3231 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3232 channel);
3233 if (bss) {
3234 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3235 ieee80211_rx_bss_put(local, bss);
3236 }
3237 }
3238
3239
3240 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3241 struct sk_buff *skb)
3242 {
3243 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3244 struct ieee80211_if_managed *ifmgd;
3245 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3246 size_t baselen, len = skb->len;
3247 struct ieee802_11_elems elems;
3248
3249 ifmgd = &sdata->u.mgd;
3250
3251 sdata_assert_lock(sdata);
3252
3253 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3254 return; /* ignore ProbeResp to foreign address */
3255
3256 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3257 if (baselen > len)
3258 return;
3259
3260 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3261 false, &elems);
3262
3263 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3264
3265 if (ifmgd->associated &&
3266 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3267 ieee80211_reset_ap_probe(sdata);
3268 }
3269
3270 /*
3271 * This is the canonical list of information elements we care about,
3272 * the filter code also gives us all changes to the Microsoft OUI
3273 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3274 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3275 * changes to requested client power.
3276 *
3277 * We implement beacon filtering in software since that means we can
3278 * avoid processing the frame here and in cfg80211, and userspace
3279 * will not be able to tell whether the hardware supports it or not.
3280 *
3281 * XXX: This list needs to be dynamic -- userspace needs to be able to
3282 * add items it requires. It also needs to be able to tell us to
3283 * look out for other vendor IEs.
3284 */
3285 static const u64 care_about_ies =
3286 (1ULL << WLAN_EID_COUNTRY) |
3287 (1ULL << WLAN_EID_ERP_INFO) |
3288 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3289 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3290 (1ULL << WLAN_EID_HT_CAPABILITY) |
3291 (1ULL << WLAN_EID_HT_OPERATION) |
3292 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3293
3294 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3295 struct ieee80211_mgmt *mgmt, size_t len,
3296 struct ieee80211_rx_status *rx_status)
3297 {
3298 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3299 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3300 size_t baselen;
3301 struct ieee802_11_elems elems;
3302 struct ieee80211_local *local = sdata->local;
3303 struct ieee80211_chanctx_conf *chanctx_conf;
3304 struct ieee80211_channel *chan;
3305 struct sta_info *sta;
3306 u32 changed = 0;
3307 bool erp_valid;
3308 u8 erp_value = 0;
3309 u32 ncrc;
3310 u8 *bssid;
3311 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3312
3313 sdata_assert_lock(sdata);
3314
3315 /* Process beacon from the current BSS */
3316 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3317 if (baselen > len)
3318 return;
3319
3320 rcu_read_lock();
3321 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3322 if (!chanctx_conf) {
3323 rcu_read_unlock();
3324 return;
3325 }
3326
3327 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3328 rcu_read_unlock();
3329 return;
3330 }
3331 chan = chanctx_conf->def.chan;
3332 rcu_read_unlock();
3333
3334 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3335 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3336 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3337 len - baselen, false, &elems);
3338
3339 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3340 if (elems.tim && !elems.parse_error) {
3341 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3342 ifmgd->dtim_period = tim_ie->dtim_period;
3343 }
3344 ifmgd->have_beacon = true;
3345 ifmgd->assoc_data->need_beacon = false;
3346 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3347 sdata->vif.bss_conf.sync_tsf =
3348 le64_to_cpu(mgmt->u.beacon.timestamp);
3349 sdata->vif.bss_conf.sync_device_ts =
3350 rx_status->device_timestamp;
3351 if (elems.tim)
3352 sdata->vif.bss_conf.sync_dtim_count =
3353 elems.tim->dtim_count;
3354 else
3355 sdata->vif.bss_conf.sync_dtim_count = 0;
3356 }
3357 /* continue assoc process */
3358 ifmgd->assoc_data->timeout = jiffies;
3359 ifmgd->assoc_data->timeout_started = true;
3360 run_again(sdata, ifmgd->assoc_data->timeout);
3361 return;
3362 }
3363
3364 if (!ifmgd->associated ||
3365 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3366 return;
3367 bssid = ifmgd->associated->bssid;
3368
3369 /* Track average RSSI from the Beacon frames of the current AP */
3370 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3371 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3372 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3373 ifmgd->last_cqm_event_signal = 0;
3374 ifmgd->count_beacon_signal = 1;
3375 ifmgd->last_ave_beacon_signal = 0;
3376 } else {
3377 ifmgd->count_beacon_signal++;
3378 }
3379
3380 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3381
3382 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3383 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3384 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3385 int last_sig = ifmgd->last_ave_beacon_signal;
3386 struct ieee80211_event event = {
3387 .type = RSSI_EVENT,
3388 };
3389
3390 /*
3391 * if signal crosses either of the boundaries, invoke callback
3392 * with appropriate parameters
3393 */
3394 if (sig > ifmgd->rssi_max_thold &&
3395 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3396 ifmgd->last_ave_beacon_signal = sig;
3397 event.u.rssi.data = RSSI_EVENT_HIGH;
3398 drv_event_callback(local, sdata, &event);
3399 } else if (sig < ifmgd->rssi_min_thold &&
3400 (last_sig >= ifmgd->rssi_max_thold ||
3401 last_sig == 0)) {
3402 ifmgd->last_ave_beacon_signal = sig;
3403 event.u.rssi.data = RSSI_EVENT_LOW;
3404 drv_event_callback(local, sdata, &event);
3405 }
3406 }
3407
3408 if (bss_conf->cqm_rssi_thold &&
3409 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3410 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3411 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3412 int last_event = ifmgd->last_cqm_event_signal;
3413 int thold = bss_conf->cqm_rssi_thold;
3414 int hyst = bss_conf->cqm_rssi_hyst;
3415
3416 if (sig < thold &&
3417 (last_event == 0 || sig < last_event - hyst)) {
3418 ifmgd->last_cqm_event_signal = sig;
3419 ieee80211_cqm_rssi_notify(
3420 &sdata->vif,
3421 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3422 sig, GFP_KERNEL);
3423 } else if (sig > thold &&
3424 (last_event == 0 || sig > last_event + hyst)) {
3425 ifmgd->last_cqm_event_signal = sig;
3426 ieee80211_cqm_rssi_notify(
3427 &sdata->vif,
3428 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3429 sig, GFP_KERNEL);
3430 }
3431 }
3432
3433 if (bss_conf->cqm_rssi_low &&
3434 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3435 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3436 int last_event = ifmgd->last_cqm_event_signal;
3437 int low = bss_conf->cqm_rssi_low;
3438 int high = bss_conf->cqm_rssi_high;
3439
3440 if (sig < low &&
3441 (last_event == 0 || last_event >= low)) {
3442 ifmgd->last_cqm_event_signal = sig;
3443 ieee80211_cqm_rssi_notify(
3444 &sdata->vif,
3445 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3446 sig, GFP_KERNEL);
3447 } else if (sig > high &&
3448 (last_event == 0 || last_event <= high)) {
3449 ifmgd->last_cqm_event_signal = sig;
3450 ieee80211_cqm_rssi_notify(
3451 &sdata->vif,
3452 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3453 sig, GFP_KERNEL);
3454 }
3455 }
3456
3457 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3458 mlme_dbg_ratelimited(sdata,
3459 "cancelling AP probe due to a received beacon\n");
3460 ieee80211_reset_ap_probe(sdata);
3461 }
3462
3463 /*
3464 * Push the beacon loss detection into the future since
3465 * we are processing a beacon from the AP just now.
3466 */
3467 ieee80211_sta_reset_beacon_monitor(sdata);
3468
3469 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3470 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3471 len - baselen, false, &elems,
3472 care_about_ies, ncrc);
3473
3474 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3475 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3476 if (local->hw.conf.dynamic_ps_timeout > 0) {
3477 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3478 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3479 ieee80211_hw_config(local,
3480 IEEE80211_CONF_CHANGE_PS);
3481 }
3482 ieee80211_send_nullfunc(local, sdata, false);
3483 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3484 local->pspolling = true;
3485
3486 /*
3487 * Here is assumed that the driver will be
3488 * able to send ps-poll frame and receive a
3489 * response even though power save mode is
3490 * enabled, but some drivers might require
3491 * to disable power save here. This needs
3492 * to be investigated.
3493 */
3494 ieee80211_send_pspoll(local, sdata);
3495 }
3496 }
3497
3498 if (sdata->vif.p2p ||
3499 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3500 struct ieee80211_p2p_noa_attr noa = {};
3501 int ret;
3502
3503 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3504 len - baselen,
3505 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3506 (u8 *) &noa, sizeof(noa));
3507 if (ret >= 2) {
3508 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3509 /* valid noa_attr and index changed */
3510 sdata->u.mgd.p2p_noa_index = noa.index;
3511 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3512 changed |= BSS_CHANGED_P2P_PS;
3513 /*
3514 * make sure we update all information, the CRC
3515 * mechanism doesn't look at P2P attributes.
3516 */
3517 ifmgd->beacon_crc_valid = false;
3518 }
3519 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3520 /* noa_attr not found and we had valid noa_attr before */
3521 sdata->u.mgd.p2p_noa_index = -1;
3522 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3523 changed |= BSS_CHANGED_P2P_PS;
3524 ifmgd->beacon_crc_valid = false;
3525 }
3526 }
3527
3528 if (ifmgd->csa_waiting_bcn)
3529 ieee80211_chswitch_post_beacon(sdata);
3530
3531 /*
3532 * Update beacon timing and dtim count on every beacon appearance. This
3533 * will allow the driver to use the most updated values. Do it before
3534 * comparing this one with last received beacon.
3535 * IMPORTANT: These parameters would possibly be out of sync by the time
3536 * the driver will use them. The synchronized view is currently
3537 * guaranteed only in certain callbacks.
3538 */
3539 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3540 sdata->vif.bss_conf.sync_tsf =
3541 le64_to_cpu(mgmt->u.beacon.timestamp);
3542 sdata->vif.bss_conf.sync_device_ts =
3543 rx_status->device_timestamp;
3544 if (elems.tim)
3545 sdata->vif.bss_conf.sync_dtim_count =
3546 elems.tim->dtim_count;
3547 else
3548 sdata->vif.bss_conf.sync_dtim_count = 0;
3549 }
3550
3551 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3552 return;
3553 ifmgd->beacon_crc = ncrc;
3554 ifmgd->beacon_crc_valid = true;
3555
3556 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3557
3558 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3559 rx_status->device_timestamp,
3560 &elems, true);
3561
3562 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3563 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3564 elems.wmm_param_len))
3565 changed |= BSS_CHANGED_QOS;
3566
3567 /*
3568 * If we haven't had a beacon before, tell the driver about the
3569 * DTIM period (and beacon timing if desired) now.
3570 */
3571 if (!ifmgd->have_beacon) {
3572 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3573 if (elems.tim)
3574 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3575 else
3576 bss_conf->dtim_period = 1;
3577
3578 changed |= BSS_CHANGED_BEACON_INFO;
3579 ifmgd->have_beacon = true;
3580
3581 mutex_lock(&local->iflist_mtx);
3582 ieee80211_recalc_ps(local);
3583 mutex_unlock(&local->iflist_mtx);
3584
3585 ieee80211_recalc_ps_vif(sdata);
3586 }
3587
3588 if (elems.erp_info) {
3589 erp_valid = true;
3590 erp_value = elems.erp_info[0];
3591 } else {
3592 erp_valid = false;
3593 }
3594 changed |= ieee80211_handle_bss_capability(sdata,
3595 le16_to_cpu(mgmt->u.beacon.capab_info),
3596 erp_valid, erp_value);
3597
3598 mutex_lock(&local->sta_mtx);
3599 sta = sta_info_get(sdata, bssid);
3600
3601 if (ieee80211_config_bw(sdata, sta,
3602 elems.ht_cap_elem, elems.ht_operation,
3603 elems.vht_operation, bssid, &changed)) {
3604 mutex_unlock(&local->sta_mtx);
3605 sdata_info(sdata,
3606 "failed to follow AP %pM bandwidth change, disconnect\n",
3607 bssid);
3608 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3609 WLAN_REASON_DEAUTH_LEAVING,
3610 true, deauth_buf);
3611 ieee80211_report_disconnect(sdata, deauth_buf,
3612 sizeof(deauth_buf), true,
3613 WLAN_REASON_DEAUTH_LEAVING);
3614 return;
3615 }
3616
3617 if (sta && elems.opmode_notif)
3618 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3619 rx_status->band);
3620 mutex_unlock(&local->sta_mtx);
3621
3622 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3623 elems.country_elem,
3624 elems.country_elem_len,
3625 elems.pwr_constr_elem,
3626 elems.cisco_dtpc_elem);
3627
3628 ieee80211_bss_info_change_notify(sdata, changed);
3629 }
3630
3631 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3632 struct sk_buff *skb)
3633 {
3634 struct ieee80211_rx_status *rx_status;
3635 struct ieee80211_mgmt *mgmt;
3636 u16 fc;
3637 struct ieee802_11_elems elems;
3638 int ies_len;
3639
3640 rx_status = (struct ieee80211_rx_status *) skb->cb;
3641 mgmt = (struct ieee80211_mgmt *) skb->data;
3642 fc = le16_to_cpu(mgmt->frame_control);
3643
3644 sdata_lock(sdata);
3645
3646 switch (fc & IEEE80211_FCTL_STYPE) {
3647 case IEEE80211_STYPE_BEACON:
3648 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3649 break;
3650 case IEEE80211_STYPE_PROBE_RESP:
3651 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3652 break;
3653 case IEEE80211_STYPE_AUTH:
3654 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3655 break;
3656 case IEEE80211_STYPE_DEAUTH:
3657 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3658 break;
3659 case IEEE80211_STYPE_DISASSOC:
3660 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3661 break;
3662 case IEEE80211_STYPE_ASSOC_RESP:
3663 case IEEE80211_STYPE_REASSOC_RESP:
3664 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3665 break;
3666 case IEEE80211_STYPE_ACTION:
3667 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3668 ies_len = skb->len -
3669 offsetof(struct ieee80211_mgmt,
3670 u.action.u.chan_switch.variable);
3671
3672 if (ies_len < 0)
3673 break;
3674
3675 ieee802_11_parse_elems(
3676 mgmt->u.action.u.chan_switch.variable,
3677 ies_len, true, &elems);
3678
3679 if (elems.parse_error)
3680 break;
3681
3682 ieee80211_sta_process_chanswitch(sdata,
3683 rx_status->mactime,
3684 rx_status->device_timestamp,
3685 &elems, false);
3686 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3687 ies_len = skb->len -
3688 offsetof(struct ieee80211_mgmt,
3689 u.action.u.ext_chan_switch.variable);
3690
3691 if (ies_len < 0)
3692 break;
3693
3694 ieee802_11_parse_elems(
3695 mgmt->u.action.u.ext_chan_switch.variable,
3696 ies_len, true, &elems);
3697
3698 if (elems.parse_error)
3699 break;
3700
3701 /* for the handling code pretend this was also an IE */
3702 elems.ext_chansw_ie =
3703 &mgmt->u.action.u.ext_chan_switch.data;
3704
3705 ieee80211_sta_process_chanswitch(sdata,
3706 rx_status->mactime,
3707 rx_status->device_timestamp,
3708 &elems, false);
3709 }
3710 break;
3711 }
3712 sdata_unlock(sdata);
3713 }
3714
3715 static void ieee80211_sta_timer(struct timer_list *t)
3716 {
3717 struct ieee80211_sub_if_data *sdata =
3718 from_timer(sdata, t, u.mgd.timer);
3719
3720 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3721 }
3722
3723 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3724 u8 *bssid, u8 reason, bool tx)
3725 {
3726 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3727
3728 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3729 tx, frame_buf);
3730
3731 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3732 reason);
3733 }
3734
3735 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3736 {
3737 struct ieee80211_local *local = sdata->local;
3738 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3739 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3740 u32 tx_flags = 0;
3741 u16 trans = 1;
3742 u16 status = 0;
3743
3744 sdata_assert_lock(sdata);
3745
3746 if (WARN_ON_ONCE(!auth_data))
3747 return -EINVAL;
3748
3749 auth_data->tries++;
3750
3751 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3752 sdata_info(sdata, "authentication with %pM timed out\n",
3753 auth_data->bss->bssid);
3754
3755 /*
3756 * Most likely AP is not in the range so remove the
3757 * bss struct for that AP.
3758 */
3759 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3760
3761 return -ETIMEDOUT;
3762 }
3763
3764 drv_mgd_prepare_tx(local, sdata);
3765
3766 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3767 auth_data->bss->bssid, auth_data->tries,
3768 IEEE80211_AUTH_MAX_TRIES);
3769
3770 auth_data->expected_transaction = 2;
3771
3772 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3773 trans = auth_data->sae_trans;
3774 status = auth_data->sae_status;
3775 auth_data->expected_transaction = trans;
3776 }
3777
3778 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3779 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3780 IEEE80211_TX_INTFL_MLME_CONN_TX;
3781
3782 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3783 auth_data->data, auth_data->data_len,
3784 auth_data->bss->bssid,
3785 auth_data->bss->bssid, NULL, 0, 0,
3786 tx_flags);
3787
3788 if (tx_flags == 0) {
3789 if (auth_data->algorithm == WLAN_AUTH_SAE)
3790 auth_data->timeout = jiffies +
3791 IEEE80211_AUTH_TIMEOUT_SAE;
3792 else
3793 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3794 } else {
3795 auth_data->timeout =
3796 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3797 }
3798
3799 auth_data->timeout_started = true;
3800 run_again(sdata, auth_data->timeout);
3801
3802 return 0;
3803 }
3804
3805 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3806 {
3807 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3808 struct ieee80211_local *local = sdata->local;
3809
3810 sdata_assert_lock(sdata);
3811
3812 assoc_data->tries++;
3813 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3814 sdata_info(sdata, "association with %pM timed out\n",
3815 assoc_data->bss->bssid);
3816
3817 /*
3818 * Most likely AP is not in the range so remove the
3819 * bss struct for that AP.
3820 */
3821 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3822
3823 return -ETIMEDOUT;
3824 }
3825
3826 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3827 assoc_data->bss->bssid, assoc_data->tries,
3828 IEEE80211_ASSOC_MAX_TRIES);
3829 ieee80211_send_assoc(sdata);
3830
3831 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3832 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3833 assoc_data->timeout_started = true;
3834 run_again(sdata, assoc_data->timeout);
3835 } else {
3836 assoc_data->timeout =
3837 round_jiffies_up(jiffies +
3838 IEEE80211_ASSOC_TIMEOUT_LONG);
3839 assoc_data->timeout_started = true;
3840 run_again(sdata, assoc_data->timeout);
3841 }
3842
3843 return 0;
3844 }
3845
3846 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3847 __le16 fc, bool acked)
3848 {
3849 struct ieee80211_local *local = sdata->local;
3850
3851 sdata->u.mgd.status_fc = fc;
3852 sdata->u.mgd.status_acked = acked;
3853 sdata->u.mgd.status_received = true;
3854
3855 ieee80211_queue_work(&local->hw, &sdata->work);
3856 }
3857
3858 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3859 {
3860 struct ieee80211_local *local = sdata->local;
3861 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3862
3863 sdata_lock(sdata);
3864
3865 if (ifmgd->status_received) {
3866 __le16 fc = ifmgd->status_fc;
3867 bool status_acked = ifmgd->status_acked;
3868
3869 ifmgd->status_received = false;
3870 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3871 if (status_acked) {
3872 if (ifmgd->auth_data->algorithm ==
3873 WLAN_AUTH_SAE)
3874 ifmgd->auth_data->timeout =
3875 jiffies +
3876 IEEE80211_AUTH_TIMEOUT_SAE;
3877 else
3878 ifmgd->auth_data->timeout =
3879 jiffies +
3880 IEEE80211_AUTH_TIMEOUT_SHORT;
3881 run_again(sdata, ifmgd->auth_data->timeout);
3882 } else {
3883 ifmgd->auth_data->timeout = jiffies - 1;
3884 }
3885 ifmgd->auth_data->timeout_started = true;
3886 } else if (ifmgd->assoc_data &&
3887 (ieee80211_is_assoc_req(fc) ||
3888 ieee80211_is_reassoc_req(fc))) {
3889 if (status_acked) {
3890 ifmgd->assoc_data->timeout =
3891 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3892 run_again(sdata, ifmgd->assoc_data->timeout);
3893 } else {
3894 ifmgd->assoc_data->timeout = jiffies - 1;
3895 }
3896 ifmgd->assoc_data->timeout_started = true;
3897 }
3898 }
3899
3900 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3901 time_after(jiffies, ifmgd->auth_data->timeout)) {
3902 if (ifmgd->auth_data->done) {
3903 /*
3904 * ok ... we waited for assoc but userspace didn't,
3905 * so let's just kill the auth data
3906 */
3907 ieee80211_destroy_auth_data(sdata, false);
3908 } else if (ieee80211_auth(sdata)) {
3909 u8 bssid[ETH_ALEN];
3910 struct ieee80211_event event = {
3911 .type = MLME_EVENT,
3912 .u.mlme.data = AUTH_EVENT,
3913 .u.mlme.status = MLME_TIMEOUT,
3914 };
3915
3916 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3917
3918 ieee80211_destroy_auth_data(sdata, false);
3919
3920 cfg80211_auth_timeout(sdata->dev, bssid);
3921 drv_event_callback(sdata->local, sdata, &event);
3922 }
3923 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3924 run_again(sdata, ifmgd->auth_data->timeout);
3925
3926 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3927 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3928 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3929 ieee80211_do_assoc(sdata)) {
3930 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3931 struct ieee80211_event event = {
3932 .type = MLME_EVENT,
3933 .u.mlme.data = ASSOC_EVENT,
3934 .u.mlme.status = MLME_TIMEOUT,
3935 };
3936
3937 ieee80211_destroy_assoc_data(sdata, false, false);
3938 cfg80211_assoc_timeout(sdata->dev, bss);
3939 drv_event_callback(sdata->local, sdata, &event);
3940 }
3941 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3942 run_again(sdata, ifmgd->assoc_data->timeout);
3943
3944 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3945 ifmgd->associated) {
3946 u8 bssid[ETH_ALEN];
3947 int max_tries;
3948
3949 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3950
3951 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3952 max_tries = max_nullfunc_tries;
3953 else
3954 max_tries = max_probe_tries;
3955
3956 /* ACK received for nullfunc probing frame */
3957 if (!ifmgd->probe_send_count)
3958 ieee80211_reset_ap_probe(sdata);
3959 else if (ifmgd->nullfunc_failed) {
3960 if (ifmgd->probe_send_count < max_tries) {
3961 mlme_dbg(sdata,
3962 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3963 bssid, ifmgd->probe_send_count,
3964 max_tries);
3965 ieee80211_mgd_probe_ap_send(sdata);
3966 } else {
3967 mlme_dbg(sdata,
3968 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3969 bssid);
3970 ieee80211_sta_connection_lost(sdata, bssid,
3971 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3972 false);
3973 }
3974 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3975 run_again(sdata, ifmgd->probe_timeout);
3976 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3977 mlme_dbg(sdata,
3978 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3979 bssid, probe_wait_ms);
3980 ieee80211_sta_connection_lost(sdata, bssid,
3981 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3982 } else if (ifmgd->probe_send_count < max_tries) {
3983 mlme_dbg(sdata,
3984 "No probe response from AP %pM after %dms, try %d/%i\n",
3985 bssid, probe_wait_ms,
3986 ifmgd->probe_send_count, max_tries);
3987 ieee80211_mgd_probe_ap_send(sdata);
3988 } else {
3989 /*
3990 * We actually lost the connection ... or did we?
3991 * Let's make sure!
3992 */
3993 mlme_dbg(sdata,
3994 "No probe response from AP %pM after %dms, disconnecting.\n",
3995 bssid, probe_wait_ms);
3996
3997 ieee80211_sta_connection_lost(sdata, bssid,
3998 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3999 }
4000 }
4001
4002 sdata_unlock(sdata);
4003 }
4004
4005 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
4006 {
4007 struct ieee80211_sub_if_data *sdata =
4008 from_timer(sdata, t, u.mgd.bcn_mon_timer);
4009 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4010
4011 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4012 return;
4013
4014 sdata->u.mgd.connection_loss = false;
4015 ieee80211_queue_work(&sdata->local->hw,
4016 &sdata->u.mgd.beacon_connection_loss_work);
4017 }
4018
4019 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
4020 {
4021 struct ieee80211_sub_if_data *sdata =
4022 from_timer(sdata, t, u.mgd.conn_mon_timer);
4023 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4024 struct ieee80211_local *local = sdata->local;
4025
4026 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4027 return;
4028
4029 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4030 }
4031
4032 static void ieee80211_sta_monitor_work(struct work_struct *work)
4033 {
4034 struct ieee80211_sub_if_data *sdata =
4035 container_of(work, struct ieee80211_sub_if_data,
4036 u.mgd.monitor_work);
4037
4038 ieee80211_mgd_probe_ap(sdata, false);
4039 }
4040
4041 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4042 {
4043 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4044 __ieee80211_stop_poll(sdata);
4045
4046 /* let's probe the connection once */
4047 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4048 ieee80211_queue_work(&sdata->local->hw,
4049 &sdata->u.mgd.monitor_work);
4050 }
4051 }
4052
4053 #ifdef CONFIG_PM
4054 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4055 {
4056 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4057 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4058
4059 sdata_lock(sdata);
4060
4061 if (ifmgd->auth_data || ifmgd->assoc_data) {
4062 const u8 *bssid = ifmgd->auth_data ?
4063 ifmgd->auth_data->bss->bssid :
4064 ifmgd->assoc_data->bss->bssid;
4065
4066 /*
4067 * If we are trying to authenticate / associate while suspending,
4068 * cfg80211 won't know and won't actually abort those attempts,
4069 * thus we need to do that ourselves.
4070 */
4071 ieee80211_send_deauth_disassoc(sdata, bssid,
4072 IEEE80211_STYPE_DEAUTH,
4073 WLAN_REASON_DEAUTH_LEAVING,
4074 false, frame_buf);
4075 if (ifmgd->assoc_data)
4076 ieee80211_destroy_assoc_data(sdata, false, true);
4077 if (ifmgd->auth_data)
4078 ieee80211_destroy_auth_data(sdata, false);
4079 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4080 IEEE80211_DEAUTH_FRAME_LEN);
4081 }
4082
4083 /* This is a bit of a hack - we should find a better and more generic
4084 * solution to this. Normally when suspending, cfg80211 will in fact
4085 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4086 * auth (not so important) or assoc (this is the problem) process.
4087 *
4088 * As a consequence, it can happen that we are in the process of both
4089 * associating and suspending, and receive an association response
4090 * after cfg80211 has checked if it needs to disconnect, but before
4091 * we actually set the flag to drop incoming frames. This will then
4092 * cause the workqueue flush to process the association response in
4093 * the suspend, resulting in a successful association just before it
4094 * tries to remove the interface from the driver, which now though
4095 * has a channel context assigned ... this results in issues.
4096 *
4097 * To work around this (for now) simply deauth here again if we're
4098 * now connected.
4099 */
4100 if (ifmgd->associated && !sdata->local->wowlan) {
4101 u8 bssid[ETH_ALEN];
4102 struct cfg80211_deauth_request req = {
4103 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4104 .bssid = bssid,
4105 };
4106
4107 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4108 ieee80211_mgd_deauth(sdata, &req);
4109 }
4110
4111 sdata_unlock(sdata);
4112 }
4113
4114 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4115 {
4116 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4117
4118 sdata_lock(sdata);
4119 if (!ifmgd->associated) {
4120 sdata_unlock(sdata);
4121 return;
4122 }
4123
4124 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4125 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4126 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4127 ieee80211_sta_connection_lost(sdata,
4128 ifmgd->associated->bssid,
4129 WLAN_REASON_UNSPECIFIED,
4130 true);
4131 sdata_unlock(sdata);
4132 return;
4133 }
4134 sdata_unlock(sdata);
4135 }
4136 #endif
4137
4138 /* interface setup */
4139 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4140 {
4141 struct ieee80211_if_managed *ifmgd;
4142
4143 ifmgd = &sdata->u.mgd;
4144 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4145 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4146 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4147 ieee80211_beacon_connection_loss_work);
4148 INIT_WORK(&ifmgd->csa_connection_drop_work,
4149 ieee80211_csa_connection_drop_work);
4150 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4151 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4152 ieee80211_tdls_peer_del_work);
4153 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
4154 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
4155 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
4156 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
4157 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4158 ieee80211_sta_handle_tspec_ac_params_wk);
4159
4160 ifmgd->flags = 0;
4161 ifmgd->powersave = sdata->wdev.ps;
4162 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4163 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4164 ifmgd->p2p_noa_index = -1;
4165
4166 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4167 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4168 else
4169 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4170
4171 /* Setup TDLS data */
4172 spin_lock_init(&ifmgd->teardown_lock);
4173 ifmgd->teardown_skb = NULL;
4174 ifmgd->orig_teardown_skb = NULL;
4175 }
4176
4177 /* scan finished notification */
4178 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4179 {
4180 struct ieee80211_sub_if_data *sdata;
4181
4182 /* Restart STA timers */
4183 rcu_read_lock();
4184 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4185 if (ieee80211_sdata_running(sdata))
4186 ieee80211_restart_sta_timer(sdata);
4187 }
4188 rcu_read_unlock();
4189 }
4190
4191 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4192 struct cfg80211_bss *cbss)
4193 {
4194 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4195 const u8 *ht_cap_ie, *vht_cap_ie;
4196 const struct ieee80211_ht_cap *ht_cap;
4197 const struct ieee80211_vht_cap *vht_cap;
4198 u8 chains = 1;
4199
4200 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4201 return chains;
4202
4203 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4204 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4205 ht_cap = (void *)(ht_cap_ie + 2);
4206 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4207 /*
4208 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4209 * "Tx Unequal Modulation Supported" fields.
4210 */
4211 }
4212
4213 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4214 return chains;
4215
4216 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4217 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4218 u8 nss;
4219 u16 tx_mcs_map;
4220
4221 vht_cap = (void *)(vht_cap_ie + 2);
4222 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4223 for (nss = 8; nss > 0; nss--) {
4224 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4225 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4226 break;
4227 }
4228 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4229 chains = max(chains, nss);
4230 }
4231
4232 return chains;
4233 }
4234
4235 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4236 struct cfg80211_bss *cbss)
4237 {
4238 struct ieee80211_local *local = sdata->local;
4239 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4240 const struct ieee80211_ht_cap *ht_cap = NULL;
4241 const struct ieee80211_ht_operation *ht_oper = NULL;
4242 const struct ieee80211_vht_operation *vht_oper = NULL;
4243 struct ieee80211_supported_band *sband;
4244 struct cfg80211_chan_def chandef;
4245 int ret;
4246 u32 i;
4247 bool have_80mhz;
4248
4249 sband = local->hw.wiphy->bands[cbss->channel->band];
4250
4251 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4252 IEEE80211_STA_DISABLE_80P80MHZ |
4253 IEEE80211_STA_DISABLE_160MHZ);
4254
4255 rcu_read_lock();
4256
4257 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4258 sband->ht_cap.ht_supported) {
4259 const u8 *ht_oper_ie, *ht_cap_ie;
4260
4261 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4262 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4263 ht_oper = (void *)(ht_oper_ie + 2);
4264
4265 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4266 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4267 ht_cap = (void *)(ht_cap_ie + 2);
4268
4269 if (!ht_cap) {
4270 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4271 ht_oper = NULL;
4272 }
4273 }
4274
4275 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4276 sband->vht_cap.vht_supported) {
4277 const u8 *vht_oper_ie, *vht_cap;
4278
4279 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4280 WLAN_EID_VHT_OPERATION);
4281 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4282 vht_oper = (void *)(vht_oper_ie + 2);
4283 if (vht_oper && !ht_oper) {
4284 vht_oper = NULL;
4285 sdata_info(sdata,
4286 "AP advertised VHT without HT, disabling both\n");
4287 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4288 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4289 }
4290
4291 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4292 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4293 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4294 vht_oper = NULL;
4295 }
4296 }
4297
4298 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4299 have_80mhz = false;
4300 for (i = 0; i < sband->n_channels; i++) {
4301 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4302 IEEE80211_CHAN_NO_80MHZ))
4303 continue;
4304
4305 have_80mhz = true;
4306 break;
4307 }
4308
4309 if (!have_80mhz)
4310 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4311
4312 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4313 cbss->channel,
4314 ht_oper, vht_oper,
4315 &chandef, false);
4316
4317 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4318 local->rx_chains);
4319
4320 rcu_read_unlock();
4321
4322 /* will change later if needed */
4323 sdata->smps_mode = IEEE80211_SMPS_OFF;
4324
4325 mutex_lock(&local->mtx);
4326 /*
4327 * If this fails (possibly due to channel context sharing
4328 * on incompatible channels, e.g. 80+80 and 160 sharing the
4329 * same control channel) try to use a smaller bandwidth.
4330 */
4331 ret = ieee80211_vif_use_channel(sdata, &chandef,
4332 IEEE80211_CHANCTX_SHARED);
4333
4334 /* don't downgrade for 5 and 10 MHz channels, though. */
4335 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4336 chandef.width == NL80211_CHAN_WIDTH_10)
4337 goto out;
4338
4339 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4340 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4341 ret = ieee80211_vif_use_channel(sdata, &chandef,
4342 IEEE80211_CHANCTX_SHARED);
4343 }
4344 out:
4345 mutex_unlock(&local->mtx);
4346 return ret;
4347 }
4348
4349 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4350 struct cfg80211_bss *cbss, bool assoc,
4351 bool override)
4352 {
4353 struct ieee80211_local *local = sdata->local;
4354 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4355 struct ieee80211_bss *bss = (void *)cbss->priv;
4356 struct sta_info *new_sta = NULL;
4357 struct ieee80211_supported_band *sband;
4358 bool have_sta = false;
4359 int err;
4360
4361 sband = local->hw.wiphy->bands[cbss->channel->band];
4362
4363 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4364 return -EINVAL;
4365
4366 /* If a reconfig is happening, bail out */
4367 if (local->in_reconfig)
4368 return -EBUSY;
4369
4370 if (assoc) {
4371 rcu_read_lock();
4372 have_sta = sta_info_get(sdata, cbss->bssid);
4373 rcu_read_unlock();
4374 }
4375
4376 if (!have_sta) {
4377 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4378 if (!new_sta)
4379 return -ENOMEM;
4380 }
4381
4382 /*
4383 * Set up the information for the new channel before setting the
4384 * new channel. We can't - completely race-free - change the basic
4385 * rates bitmap and the channel (sband) that it refers to, but if
4386 * we set it up before we at least avoid calling into the driver's
4387 * bss_info_changed() method with invalid information (since we do
4388 * call that from changing the channel - only for IDLE and perhaps
4389 * some others, but ...).
4390 *
4391 * So to avoid that, just set up all the new information before the
4392 * channel, but tell the driver to apply it only afterwards, since
4393 * it might need the new channel for that.
4394 */
4395 if (new_sta) {
4396 u32 rates = 0, basic_rates = 0;
4397 bool have_higher_than_11mbit;
4398 int min_rate = INT_MAX, min_rate_index = -1;
4399 const struct cfg80211_bss_ies *ies;
4400 int shift = ieee80211_vif_get_shift(&sdata->vif);
4401
4402 ieee80211_get_rates(sband, bss->supp_rates,
4403 bss->supp_rates_len,
4404 &rates, &basic_rates,
4405 &have_higher_than_11mbit,
4406 &min_rate, &min_rate_index,
4407 shift);
4408
4409 /*
4410 * This used to be a workaround for basic rates missing
4411 * in the association response frame. Now that we no
4412 * longer use the basic rates from there, it probably
4413 * doesn't happen any more, but keep the workaround so
4414 * in case some *other* APs are buggy in different ways
4415 * we can connect -- with a warning.
4416 */
4417 if (!basic_rates && min_rate_index >= 0) {
4418 sdata_info(sdata,
4419 "No basic rates, using min rate instead\n");
4420 basic_rates = BIT(min_rate_index);
4421 }
4422
4423 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4424 sdata->vif.bss_conf.basic_rates = basic_rates;
4425
4426 /* cf. IEEE 802.11 9.2.12 */
4427 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4428 have_higher_than_11mbit)
4429 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4430 else
4431 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4432
4433 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4434
4435 /* set timing information */
4436 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4437 rcu_read_lock();
4438 ies = rcu_dereference(cbss->beacon_ies);
4439 if (ies) {
4440 const u8 *tim_ie;
4441
4442 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4443 sdata->vif.bss_conf.sync_device_ts =
4444 bss->device_ts_beacon;
4445 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4446 ies->data, ies->len);
4447 if (tim_ie && tim_ie[1] >= 2)
4448 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4449 else
4450 sdata->vif.bss_conf.sync_dtim_count = 0;
4451 } else if (!ieee80211_hw_check(&sdata->local->hw,
4452 TIMING_BEACON_ONLY)) {
4453 ies = rcu_dereference(cbss->proberesp_ies);
4454 /* must be non-NULL since beacon IEs were NULL */
4455 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4456 sdata->vif.bss_conf.sync_device_ts =
4457 bss->device_ts_presp;
4458 sdata->vif.bss_conf.sync_dtim_count = 0;
4459 } else {
4460 sdata->vif.bss_conf.sync_tsf = 0;
4461 sdata->vif.bss_conf.sync_device_ts = 0;
4462 sdata->vif.bss_conf.sync_dtim_count = 0;
4463 }
4464 rcu_read_unlock();
4465 }
4466
4467 if (new_sta || override) {
4468 err = ieee80211_prep_channel(sdata, cbss);
4469 if (err) {
4470 if (new_sta)
4471 sta_info_free(local, new_sta);
4472 return -EINVAL;
4473 }
4474 }
4475
4476 if (new_sta) {
4477 /*
4478 * tell driver about BSSID, basic rates and timing
4479 * this was set up above, before setting the channel
4480 */
4481 ieee80211_bss_info_change_notify(sdata,
4482 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4483 BSS_CHANGED_BEACON_INT);
4484
4485 if (assoc)
4486 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4487
4488 err = sta_info_insert(new_sta);
4489 new_sta = NULL;
4490 if (err) {
4491 sdata_info(sdata,
4492 "failed to insert STA entry for the AP (error %d)\n",
4493 err);
4494 return err;
4495 }
4496 } else
4497 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4498
4499 /* Cancel scan to ensure that nothing interferes with connection */
4500 if (local->scanning)
4501 ieee80211_scan_cancel(local);
4502
4503 return 0;
4504 }
4505
4506 /* config hooks */
4507 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4508 struct cfg80211_auth_request *req)
4509 {
4510 struct ieee80211_local *local = sdata->local;
4511 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4512 struct ieee80211_mgd_auth_data *auth_data;
4513 u16 auth_alg;
4514 int err;
4515
4516 /* prepare auth data structure */
4517
4518 switch (req->auth_type) {
4519 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4520 auth_alg = WLAN_AUTH_OPEN;
4521 break;
4522 case NL80211_AUTHTYPE_SHARED_KEY:
4523 if (IS_ERR(local->wep_tx_tfm))
4524 return -EOPNOTSUPP;
4525 auth_alg = WLAN_AUTH_SHARED_KEY;
4526 break;
4527 case NL80211_AUTHTYPE_FT:
4528 auth_alg = WLAN_AUTH_FT;
4529 break;
4530 case NL80211_AUTHTYPE_NETWORK_EAP:
4531 auth_alg = WLAN_AUTH_LEAP;
4532 break;
4533 case NL80211_AUTHTYPE_SAE:
4534 auth_alg = WLAN_AUTH_SAE;
4535 break;
4536 case NL80211_AUTHTYPE_FILS_SK:
4537 auth_alg = WLAN_AUTH_FILS_SK;
4538 break;
4539 case NL80211_AUTHTYPE_FILS_SK_PFS:
4540 auth_alg = WLAN_AUTH_FILS_SK_PFS;
4541 break;
4542 case NL80211_AUTHTYPE_FILS_PK:
4543 auth_alg = WLAN_AUTH_FILS_PK;
4544 break;
4545 default:
4546 return -EOPNOTSUPP;
4547 }
4548
4549 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
4550 req->ie_len, GFP_KERNEL);
4551 if (!auth_data)
4552 return -ENOMEM;
4553
4554 auth_data->bss = req->bss;
4555
4556 if (req->auth_data_len >= 4) {
4557 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
4558 __le16 *pos = (__le16 *) req->auth_data;
4559
4560 auth_data->sae_trans = le16_to_cpu(pos[0]);
4561 auth_data->sae_status = le16_to_cpu(pos[1]);
4562 }
4563 memcpy(auth_data->data, req->auth_data + 4,
4564 req->auth_data_len - 4);
4565 auth_data->data_len += req->auth_data_len - 4;
4566 }
4567
4568 if (req->ie && req->ie_len) {
4569 memcpy(&auth_data->data[auth_data->data_len],
4570 req->ie, req->ie_len);
4571 auth_data->data_len += req->ie_len;
4572 }
4573
4574 if (req->key && req->key_len) {
4575 auth_data->key_len = req->key_len;
4576 auth_data->key_idx = req->key_idx;
4577 memcpy(auth_data->key, req->key, req->key_len);
4578 }
4579
4580 auth_data->algorithm = auth_alg;
4581
4582 /* try to authenticate/probe */
4583
4584 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4585 ifmgd->assoc_data) {
4586 err = -EBUSY;
4587 goto err_free;
4588 }
4589
4590 if (ifmgd->auth_data)
4591 ieee80211_destroy_auth_data(sdata, false);
4592
4593 /* prep auth_data so we don't go into idle on disassoc */
4594 ifmgd->auth_data = auth_data;
4595
4596 if (ifmgd->associated) {
4597 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4598
4599 sdata_info(sdata,
4600 "disconnect from AP %pM for new auth to %pM\n",
4601 ifmgd->associated->bssid, req->bss->bssid);
4602 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4603 WLAN_REASON_UNSPECIFIED,
4604 false, frame_buf);
4605
4606 ieee80211_report_disconnect(sdata, frame_buf,
4607 sizeof(frame_buf), true,
4608 WLAN_REASON_UNSPECIFIED);
4609 }
4610
4611 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4612
4613 err = ieee80211_prep_connection(sdata, req->bss, false, false);
4614 if (err)
4615 goto err_clear;
4616
4617 err = ieee80211_auth(sdata);
4618 if (err) {
4619 sta_info_destroy_addr(sdata, req->bss->bssid);
4620 goto err_clear;
4621 }
4622
4623 /* hold our own reference */
4624 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4625 return 0;
4626
4627 err_clear:
4628 eth_zero_addr(ifmgd->bssid);
4629 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4630 ifmgd->auth_data = NULL;
4631 mutex_lock(&sdata->local->mtx);
4632 ieee80211_vif_release_channel(sdata);
4633 mutex_unlock(&sdata->local->mtx);
4634 err_free:
4635 kfree(auth_data);
4636 return err;
4637 }
4638
4639 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4640 struct cfg80211_assoc_request *req)
4641 {
4642 struct ieee80211_local *local = sdata->local;
4643 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4644 struct ieee80211_bss *bss = (void *)req->bss->priv;
4645 struct ieee80211_mgd_assoc_data *assoc_data;
4646 const struct cfg80211_bss_ies *beacon_ies;
4647 struct ieee80211_supported_band *sband;
4648 const u8 *ssidie, *ht_ie, *vht_ie;
4649 int i, err;
4650 bool override = false;
4651
4652 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4653 if (!assoc_data)
4654 return -ENOMEM;
4655
4656 rcu_read_lock();
4657 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4658 if (!ssidie) {
4659 rcu_read_unlock();
4660 kfree(assoc_data);
4661 return -EINVAL;
4662 }
4663 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4664 assoc_data->ssid_len = ssidie[1];
4665 rcu_read_unlock();
4666
4667 if (ifmgd->associated) {
4668 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4669
4670 sdata_info(sdata,
4671 "disconnect from AP %pM for new assoc to %pM\n",
4672 ifmgd->associated->bssid, req->bss->bssid);
4673 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4674 WLAN_REASON_UNSPECIFIED,
4675 false, frame_buf);
4676
4677 ieee80211_report_disconnect(sdata, frame_buf,
4678 sizeof(frame_buf), true,
4679 WLAN_REASON_UNSPECIFIED);
4680 }
4681
4682 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4683 err = -EBUSY;
4684 goto err_free;
4685 }
4686
4687 if (ifmgd->assoc_data) {
4688 err = -EBUSY;
4689 goto err_free;
4690 }
4691
4692 if (ifmgd->auth_data) {
4693 bool match;
4694
4695 /* keep sta info, bssid if matching */
4696 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4697 ieee80211_destroy_auth_data(sdata, match);
4698 }
4699
4700 /* prepare assoc data */
4701
4702 ifmgd->beacon_crc_valid = false;
4703
4704 assoc_data->wmm = bss->wmm_used &&
4705 (local->hw.queues >= IEEE80211_NUM_ACS);
4706
4707 /*
4708 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4709 * We still associate in non-HT mode (11a/b/g) if any one of these
4710 * ciphers is configured as pairwise.
4711 * We can set this to true for non-11n hardware, that'll be checked
4712 * separately along with the peer capabilities.
4713 */
4714 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4715 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4716 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4717 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4718 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4719 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4720 netdev_info(sdata->dev,
4721 "disabling HT/VHT due to WEP/TKIP use\n");
4722 }
4723 }
4724
4725 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4726 sband = local->hw.wiphy->bands[req->bss->channel->band];
4727 if (!sband->ht_cap.ht_supported ||
4728 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4729 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4730 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4731 if (!bss->wmm_used &&
4732 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4733 netdev_info(sdata->dev,
4734 "disabling HT as WMM/QoS is not supported by the AP\n");
4735 }
4736
4737 /* disable VHT if we don't support it or the AP doesn't use WMM */
4738 if (!sband->vht_cap.vht_supported ||
4739 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4740 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4741 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4742 if (!bss->wmm_used &&
4743 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4744 netdev_info(sdata->dev,
4745 "disabling VHT as WMM/QoS is not supported by the AP\n");
4746 }
4747
4748 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4749 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4750 sizeof(ifmgd->ht_capa_mask));
4751
4752 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4753 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4754 sizeof(ifmgd->vht_capa_mask));
4755
4756 if (req->ie && req->ie_len) {
4757 memcpy(assoc_data->ie, req->ie, req->ie_len);
4758 assoc_data->ie_len = req->ie_len;
4759 }
4760
4761 if (req->fils_kek) {
4762 /* should already be checked in cfg80211 - so warn */
4763 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
4764 err = -EINVAL;
4765 goto err_free;
4766 }
4767 memcpy(assoc_data->fils_kek, req->fils_kek,
4768 req->fils_kek_len);
4769 assoc_data->fils_kek_len = req->fils_kek_len;
4770 }
4771
4772 if (req->fils_nonces)
4773 memcpy(assoc_data->fils_nonces, req->fils_nonces,
4774 2 * FILS_NONCE_LEN);
4775
4776 assoc_data->bss = req->bss;
4777
4778 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4779 if (ifmgd->powersave)
4780 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4781 else
4782 sdata->smps_mode = IEEE80211_SMPS_OFF;
4783 } else
4784 sdata->smps_mode = ifmgd->req_smps;
4785
4786 assoc_data->capability = req->bss->capability;
4787 assoc_data->supp_rates = bss->supp_rates;
4788 assoc_data->supp_rates_len = bss->supp_rates_len;
4789
4790 rcu_read_lock();
4791 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4792 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4793 assoc_data->ap_ht_param =
4794 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4795 else
4796 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4797 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4798 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4799 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4800 sizeof(struct ieee80211_vht_cap));
4801 else
4802 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4803 rcu_read_unlock();
4804
4805 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4806 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4807 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4808 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4809
4810 if (bss->wmm_used && bss->uapsd_supported &&
4811 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4812 assoc_data->uapsd = true;
4813 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4814 } else {
4815 assoc_data->uapsd = false;
4816 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4817 }
4818
4819 if (req->prev_bssid)
4820 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4821
4822 if (req->use_mfp) {
4823 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4824 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4825 } else {
4826 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4827 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4828 }
4829
4830 if (req->flags & ASSOC_REQ_USE_RRM)
4831 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4832 else
4833 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4834
4835 if (req->crypto.control_port)
4836 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4837 else
4838 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4839
4840 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4841 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4842 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4843 sdata->vif.type);
4844
4845 /* kick off associate process */
4846
4847 ifmgd->assoc_data = assoc_data;
4848 ifmgd->dtim_period = 0;
4849 ifmgd->have_beacon = false;
4850
4851 /* override HT/VHT configuration only if the AP and we support it */
4852 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4853 struct ieee80211_sta_ht_cap sta_ht_cap;
4854
4855 if (req->flags & ASSOC_REQ_DISABLE_HT)
4856 override = true;
4857
4858 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4859 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4860
4861 /* check for 40 MHz disable override */
4862 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4863 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4864 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4865 override = true;
4866
4867 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4868 req->flags & ASSOC_REQ_DISABLE_VHT)
4869 override = true;
4870 }
4871
4872 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4873 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4874 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4875 }
4876
4877 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4878 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4879
4880 err = ieee80211_prep_connection(sdata, req->bss, true, override);
4881 if (err)
4882 goto err_clear;
4883
4884 rcu_read_lock();
4885 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4886
4887 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4888 !beacon_ies) {
4889 /*
4890 * Wait up to one beacon interval ...
4891 * should this be more if we miss one?
4892 */
4893 sdata_info(sdata, "waiting for beacon from %pM\n",
4894 ifmgd->bssid);
4895 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4896 assoc_data->timeout_started = true;
4897 assoc_data->need_beacon = true;
4898 } else if (beacon_ies) {
4899 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4900 beacon_ies->data,
4901 beacon_ies->len);
4902 u8 dtim_count = 0;
4903
4904 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4905 const struct ieee80211_tim_ie *tim;
4906 tim = (void *)(tim_ie + 2);
4907 ifmgd->dtim_period = tim->dtim_period;
4908 dtim_count = tim->dtim_count;
4909 }
4910 ifmgd->have_beacon = true;
4911 assoc_data->timeout = jiffies;
4912 assoc_data->timeout_started = true;
4913
4914 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4915 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4916 sdata->vif.bss_conf.sync_device_ts =
4917 bss->device_ts_beacon;
4918 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4919 }
4920 } else {
4921 assoc_data->timeout = jiffies;
4922 assoc_data->timeout_started = true;
4923 }
4924 rcu_read_unlock();
4925
4926 run_again(sdata, assoc_data->timeout);
4927
4928 if (bss->corrupt_data) {
4929 char *corrupt_type = "data";
4930 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4931 if (bss->corrupt_data &
4932 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4933 corrupt_type = "beacon and probe response";
4934 else
4935 corrupt_type = "beacon";
4936 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4937 corrupt_type = "probe response";
4938 sdata_info(sdata, "associating with AP with corrupt %s\n",
4939 corrupt_type);
4940 }
4941
4942 return 0;
4943 err_clear:
4944 eth_zero_addr(ifmgd->bssid);
4945 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4946 ifmgd->assoc_data = NULL;
4947 err_free:
4948 kfree(assoc_data);
4949 return err;
4950 }
4951
4952 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4953 struct cfg80211_deauth_request *req)
4954 {
4955 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4956 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4957 bool tx = !req->local_state_change;
4958
4959 if (ifmgd->auth_data &&
4960 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4961 sdata_info(sdata,
4962 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4963 req->bssid, req->reason_code,
4964 ieee80211_get_reason_code_string(req->reason_code));
4965
4966 drv_mgd_prepare_tx(sdata->local, sdata);
4967 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4968 IEEE80211_STYPE_DEAUTH,
4969 req->reason_code, tx,
4970 frame_buf);
4971 ieee80211_destroy_auth_data(sdata, false);
4972 ieee80211_report_disconnect(sdata, frame_buf,
4973 sizeof(frame_buf), true,
4974 req->reason_code);
4975
4976 return 0;
4977 }
4978
4979 if (ifmgd->assoc_data &&
4980 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4981 sdata_info(sdata,
4982 "aborting association with %pM by local choice (Reason: %u=%s)\n",
4983 req->bssid, req->reason_code,
4984 ieee80211_get_reason_code_string(req->reason_code));
4985
4986 drv_mgd_prepare_tx(sdata->local, sdata);
4987 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4988 IEEE80211_STYPE_DEAUTH,
4989 req->reason_code, tx,
4990 frame_buf);
4991 ieee80211_destroy_assoc_data(sdata, false, true);
4992 ieee80211_report_disconnect(sdata, frame_buf,
4993 sizeof(frame_buf), true,
4994 req->reason_code);
4995 return 0;
4996 }
4997
4998 if (ifmgd->associated &&
4999 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5000 sdata_info(sdata,
5001 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5002 req->bssid, req->reason_code,
5003 ieee80211_get_reason_code_string(req->reason_code));
5004
5005 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5006 req->reason_code, tx, frame_buf);
5007 ieee80211_report_disconnect(sdata, frame_buf,
5008 sizeof(frame_buf), true,
5009 req->reason_code);
5010 return 0;
5011 }
5012
5013 return -ENOTCONN;
5014 }
5015
5016 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5017 struct cfg80211_disassoc_request *req)
5018 {
5019 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5020 u8 bssid[ETH_ALEN];
5021 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5022
5023 /*
5024 * cfg80211 should catch this ... but it's racy since
5025 * we can receive a disassoc frame, process it, hand it
5026 * to cfg80211 while that's in a locked section already
5027 * trying to tell us that the user wants to disconnect.
5028 */
5029 if (ifmgd->associated != req->bss)
5030 return -ENOLINK;
5031
5032 sdata_info(sdata,
5033 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5034 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5035
5036 memcpy(bssid, req->bss->bssid, ETH_ALEN);
5037 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5038 req->reason_code, !req->local_state_change,
5039 frame_buf);
5040
5041 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5042 req->reason_code);
5043
5044 return 0;
5045 }
5046
5047 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5048 {
5049 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5050
5051 /*
5052 * Make sure some work items will not run after this,
5053 * they will not do anything but might not have been
5054 * cancelled when disconnecting.
5055 */
5056 cancel_work_sync(&ifmgd->monitor_work);
5057 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5058 cancel_work_sync(&ifmgd->request_smps_work);
5059 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5060 cancel_work_sync(&ifmgd->chswitch_work);
5061 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5062
5063 sdata_lock(sdata);
5064 if (ifmgd->assoc_data) {
5065 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5066 ieee80211_destroy_assoc_data(sdata, false, false);
5067 cfg80211_assoc_timeout(sdata->dev, bss);
5068 }
5069 if (ifmgd->auth_data)
5070 ieee80211_destroy_auth_data(sdata, false);
5071 spin_lock_bh(&ifmgd->teardown_lock);
5072 if (ifmgd->teardown_skb) {
5073 kfree_skb(ifmgd->teardown_skb);
5074 ifmgd->teardown_skb = NULL;
5075 ifmgd->orig_teardown_skb = NULL;
5076 }
5077 spin_unlock_bh(&ifmgd->teardown_lock);
5078 del_timer_sync(&ifmgd->timer);
5079 sdata_unlock(sdata);
5080 }
5081
5082 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5083 enum nl80211_cqm_rssi_threshold_event rssi_event,
5084 s32 rssi_level,
5085 gfp_t gfp)
5086 {
5087 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5088
5089 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5090
5091 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5092 }
5093 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5094
5095 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5096 {
5097 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5098
5099 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5100
5101 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5102 }
5103 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
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