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Merge tag 'juno-fixes-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep...
[mirror_ubuntu-artful-kernel.git] / net / mac80211 / mlme.c
1 /*
2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 * Copyright (C) 2015 - 2016 Intel Deutschland GmbH
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15
16 #include <linux/delay.h>
17 #include <linux/if_ether.h>
18 #include <linux/skbuff.h>
19 #include <linux/if_arp.h>
20 #include <linux/etherdevice.h>
21 #include <linux/moduleparam.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/crc32.h>
24 #include <linux/slab.h>
25 #include <linux/export.h>
26 #include <net/mac80211.h>
27 #include <asm/unaligned.h>
28
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
31 #include "rate.h"
32 #include "led.h"
33 #include "fils_aead.h"
34
35 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
36 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
37 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
38 #define IEEE80211_AUTH_MAX_TRIES 3
39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
41 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
42 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
43 #define IEEE80211_ASSOC_MAX_TRIES 3
44
45 static int max_nullfunc_tries = 2;
46 module_param(max_nullfunc_tries, int, 0644);
47 MODULE_PARM_DESC(max_nullfunc_tries,
48 "Maximum nullfunc tx tries before disconnecting (reason 4).");
49
50 static int max_probe_tries = 5;
51 module_param(max_probe_tries, int, 0644);
52 MODULE_PARM_DESC(max_probe_tries,
53 "Maximum probe tries before disconnecting (reason 4).");
54
55 /*
56 * Beacon loss timeout is calculated as N frames times the
57 * advertised beacon interval. This may need to be somewhat
58 * higher than what hardware might detect to account for
59 * delays in the host processing frames. But since we also
60 * probe on beacon miss before declaring the connection lost
61 * default to what we want.
62 */
63 static int beacon_loss_count = 7;
64 module_param(beacon_loss_count, int, 0644);
65 MODULE_PARM_DESC(beacon_loss_count,
66 "Number of beacon intervals before we decide beacon was lost.");
67
68 /*
69 * Time the connection can be idle before we probe
70 * it to see if we can still talk to the AP.
71 */
72 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
73 /*
74 * Time we wait for a probe response after sending
75 * a probe request because of beacon loss or for
76 * checking the connection still works.
77 */
78 static int probe_wait_ms = 500;
79 module_param(probe_wait_ms, int, 0644);
80 MODULE_PARM_DESC(probe_wait_ms,
81 "Maximum time(ms) to wait for probe response"
82 " before disconnecting (reason 4).");
83
84 /*
85 * How many Beacon frames need to have been used in average signal strength
86 * before starting to indicate signal change events.
87 */
88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
89
90 /*
91 * We can have multiple work items (and connection probing)
92 * scheduling this timer, but we need to take care to only
93 * reschedule it when it should fire _earlier_ than it was
94 * asked for before, or if it's not pending right now. This
95 * function ensures that. Note that it then is required to
96 * run this function for all timeouts after the first one
97 * has happened -- the work that runs from this timer will
98 * do that.
99 */
100 static void run_again(struct ieee80211_sub_if_data *sdata,
101 unsigned long timeout)
102 {
103 sdata_assert_lock(sdata);
104
105 if (!timer_pending(&sdata->u.mgd.timer) ||
106 time_before(timeout, sdata->u.mgd.timer.expires))
107 mod_timer(&sdata->u.mgd.timer, timeout);
108 }
109
110 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
111 {
112 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
113 return;
114
115 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
116 return;
117
118 mod_timer(&sdata->u.mgd.bcn_mon_timer,
119 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
120 }
121
122 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
123 {
124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
125
126 if (unlikely(!ifmgd->associated))
127 return;
128
129 if (ifmgd->probe_send_count)
130 ifmgd->probe_send_count = 0;
131
132 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
133 return;
134
135 mod_timer(&ifmgd->conn_mon_timer,
136 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
137 }
138
139 static int ecw2cw(int ecw)
140 {
141 return (1 << ecw) - 1;
142 }
143
144 static u32
145 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
146 struct ieee80211_supported_band *sband,
147 struct ieee80211_channel *channel,
148 const struct ieee80211_ht_cap *ht_cap,
149 const struct ieee80211_ht_operation *ht_oper,
150 const struct ieee80211_vht_operation *vht_oper,
151 struct cfg80211_chan_def *chandef, bool tracking)
152 {
153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
154 struct cfg80211_chan_def vht_chandef;
155 struct ieee80211_sta_ht_cap sta_ht_cap;
156 u32 ht_cfreq, ret;
157
158 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
159 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
160
161 chandef->chan = channel;
162 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
163 chandef->center_freq1 = channel->center_freq;
164 chandef->center_freq2 = 0;
165
166 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
167 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
168 goto out;
169 }
170
171 chandef->width = NL80211_CHAN_WIDTH_20;
172
173 if (!(ht_cap->cap_info &
174 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
175 ret = IEEE80211_STA_DISABLE_40MHZ;
176 vht_chandef = *chandef;
177 goto out;
178 }
179
180 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
181 channel->band);
182 /* check that channel matches the right operating channel */
183 if (!tracking && channel->center_freq != ht_cfreq) {
184 /*
185 * It's possible that some APs are confused here;
186 * Netgear WNDR3700 sometimes reports 4 higher than
187 * the actual channel in association responses, but
188 * since we look at probe response/beacon data here
189 * it should be OK.
190 */
191 sdata_info(sdata,
192 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
193 channel->center_freq, ht_cfreq,
194 ht_oper->primary_chan, channel->band);
195 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
196 goto out;
197 }
198
199 /* check 40 MHz support, if we have it */
200 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
201 ieee80211_chandef_ht_oper(ht_oper, chandef);
202 } else {
203 /* 40 MHz (and 80 MHz) must be supported for VHT */
204 ret = IEEE80211_STA_DISABLE_VHT;
205 /* also mark 40 MHz disabled */
206 ret |= IEEE80211_STA_DISABLE_40MHZ;
207 goto out;
208 }
209
210 if (!vht_oper || !sband->vht_cap.vht_supported) {
211 ret = IEEE80211_STA_DISABLE_VHT;
212 goto out;
213 }
214
215 vht_chandef = *chandef;
216 if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) {
217 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
218 sdata_info(sdata,
219 "AP VHT information is invalid, disable VHT\n");
220 ret = IEEE80211_STA_DISABLE_VHT;
221 goto out;
222 }
223
224 if (!cfg80211_chandef_valid(&vht_chandef)) {
225 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
226 sdata_info(sdata,
227 "AP VHT information is invalid, disable VHT\n");
228 ret = IEEE80211_STA_DISABLE_VHT;
229 goto out;
230 }
231
232 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
233 ret = 0;
234 goto out;
235 }
236
237 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
238 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
239 sdata_info(sdata,
240 "AP VHT information doesn't match HT, disable VHT\n");
241 ret = IEEE80211_STA_DISABLE_VHT;
242 goto out;
243 }
244
245 *chandef = vht_chandef;
246
247 ret = 0;
248
249 out:
250 /*
251 * When tracking the current AP, don't do any further checks if the
252 * new chandef is identical to the one we're currently using for the
253 * connection. This keeps us from playing ping-pong with regulatory,
254 * without it the following can happen (for example):
255 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
256 * - AP advertises regdom US
257 * - CRDA loads regdom US with 80 MHz prohibited (old database)
258 * - the code below detects an unsupported channel, downgrades, and
259 * we disconnect from the AP in the caller
260 * - disconnect causes CRDA to reload world regdomain and the game
261 * starts anew.
262 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
263 *
264 * It seems possible that there are still scenarios with CSA or real
265 * bandwidth changes where a this could happen, but those cases are
266 * less common and wouldn't completely prevent using the AP.
267 */
268 if (tracking &&
269 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
270 return ret;
271
272 /* don't print the message below for VHT mismatch if VHT is disabled */
273 if (ret & IEEE80211_STA_DISABLE_VHT)
274 vht_chandef = *chandef;
275
276 /*
277 * Ignore the DISABLED flag when we're already connected and only
278 * tracking the APs beacon for bandwidth changes - otherwise we
279 * might get disconnected here if we connect to an AP, update our
280 * regulatory information based on the AP's country IE and the
281 * information we have is wrong/outdated and disables the channel
282 * that we're actually using for the connection to the AP.
283 */
284 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
285 tracking ? 0 :
286 IEEE80211_CHAN_DISABLED)) {
287 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
288 ret = IEEE80211_STA_DISABLE_HT |
289 IEEE80211_STA_DISABLE_VHT;
290 break;
291 }
292
293 ret |= ieee80211_chandef_downgrade(chandef);
294 }
295
296 if (chandef->width != vht_chandef.width && !tracking)
297 sdata_info(sdata,
298 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
299
300 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
301 return ret;
302 }
303
304 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
305 struct sta_info *sta,
306 const struct ieee80211_ht_cap *ht_cap,
307 const struct ieee80211_ht_operation *ht_oper,
308 const struct ieee80211_vht_operation *vht_oper,
309 const u8 *bssid, u32 *changed)
310 {
311 struct ieee80211_local *local = sdata->local;
312 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
313 struct ieee80211_supported_band *sband;
314 struct ieee80211_channel *chan;
315 struct cfg80211_chan_def chandef;
316 u16 ht_opmode;
317 u32 flags;
318 enum ieee80211_sta_rx_bandwidth new_sta_bw;
319 int ret;
320
321 /* if HT was/is disabled, don't track any bandwidth changes */
322 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
323 return 0;
324
325 /* don't check VHT if we associated as non-VHT station */
326 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
327 vht_oper = NULL;
328
329 if (WARN_ON_ONCE(!sta))
330 return -EINVAL;
331
332 /*
333 * if bss configuration changed store the new one -
334 * this may be applicable even if channel is identical
335 */
336 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
337 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
338 *changed |= BSS_CHANGED_HT;
339 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
340 }
341
342 chan = sdata->vif.bss_conf.chandef.chan;
343 sband = local->hw.wiphy->bands[chan->band];
344
345 /* calculate new channel (type) based on HT/VHT operation IEs */
346 flags = ieee80211_determine_chantype(sdata, sband, chan,
347 ht_cap, ht_oper, vht_oper,
348 &chandef, true);
349
350 /*
351 * Downgrade the new channel if we associated with restricted
352 * capabilities. For example, if we associated as a 20 MHz STA
353 * to a 40 MHz AP (due to regulatory, capabilities or config
354 * reasons) then switching to a 40 MHz channel now won't do us
355 * any good -- we couldn't use it with the AP.
356 */
357 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
358 chandef.width == NL80211_CHAN_WIDTH_80P80)
359 flags |= ieee80211_chandef_downgrade(&chandef);
360 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
361 chandef.width == NL80211_CHAN_WIDTH_160)
362 flags |= ieee80211_chandef_downgrade(&chandef);
363 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
364 chandef.width > NL80211_CHAN_WIDTH_20)
365 flags |= ieee80211_chandef_downgrade(&chandef);
366
367 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
368 return 0;
369
370 sdata_info(sdata,
371 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
372 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
373 chandef.center_freq1, chandef.center_freq2);
374
375 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
376 IEEE80211_STA_DISABLE_VHT |
377 IEEE80211_STA_DISABLE_40MHZ |
378 IEEE80211_STA_DISABLE_80P80MHZ |
379 IEEE80211_STA_DISABLE_160MHZ)) ||
380 !cfg80211_chandef_valid(&chandef)) {
381 sdata_info(sdata,
382 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
383 ifmgd->bssid);
384 return -EINVAL;
385 }
386
387 switch (chandef.width) {
388 case NL80211_CHAN_WIDTH_20_NOHT:
389 case NL80211_CHAN_WIDTH_20:
390 new_sta_bw = IEEE80211_STA_RX_BW_20;
391 break;
392 case NL80211_CHAN_WIDTH_40:
393 new_sta_bw = IEEE80211_STA_RX_BW_40;
394 break;
395 case NL80211_CHAN_WIDTH_80:
396 new_sta_bw = IEEE80211_STA_RX_BW_80;
397 break;
398 case NL80211_CHAN_WIDTH_80P80:
399 case NL80211_CHAN_WIDTH_160:
400 new_sta_bw = IEEE80211_STA_RX_BW_160;
401 break;
402 default:
403 return -EINVAL;
404 }
405
406 if (new_sta_bw > sta->cur_max_bandwidth)
407 new_sta_bw = sta->cur_max_bandwidth;
408
409 if (new_sta_bw < sta->sta.bandwidth) {
410 sta->sta.bandwidth = new_sta_bw;
411 rate_control_rate_update(local, sband, sta,
412 IEEE80211_RC_BW_CHANGED);
413 }
414
415 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
416 if (ret) {
417 sdata_info(sdata,
418 "AP %pM changed bandwidth to incompatible one - disconnect\n",
419 ifmgd->bssid);
420 return ret;
421 }
422
423 if (new_sta_bw > sta->sta.bandwidth) {
424 sta->sta.bandwidth = new_sta_bw;
425 rate_control_rate_update(local, sband, sta,
426 IEEE80211_RC_BW_CHANGED);
427 }
428
429 return 0;
430 }
431
432 /* frame sending functions */
433
434 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
435 struct sk_buff *skb, u8 ap_ht_param,
436 struct ieee80211_supported_band *sband,
437 struct ieee80211_channel *channel,
438 enum ieee80211_smps_mode smps)
439 {
440 u8 *pos;
441 u32 flags = channel->flags;
442 u16 cap;
443 struct ieee80211_sta_ht_cap ht_cap;
444
445 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
446
447 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
448 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
449
450 /* determine capability flags */
451 cap = ht_cap.cap;
452
453 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
454 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
455 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
456 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
457 cap &= ~IEEE80211_HT_CAP_SGI_40;
458 }
459 break;
460 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
461 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
462 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
463 cap &= ~IEEE80211_HT_CAP_SGI_40;
464 }
465 break;
466 }
467
468 /*
469 * If 40 MHz was disabled associate as though we weren't
470 * capable of 40 MHz -- some broken APs will never fall
471 * back to trying to transmit in 20 MHz.
472 */
473 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
474 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
475 cap &= ~IEEE80211_HT_CAP_SGI_40;
476 }
477
478 /* set SM PS mode properly */
479 cap &= ~IEEE80211_HT_CAP_SM_PS;
480 switch (smps) {
481 case IEEE80211_SMPS_AUTOMATIC:
482 case IEEE80211_SMPS_NUM_MODES:
483 WARN_ON(1);
484 case IEEE80211_SMPS_OFF:
485 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
486 IEEE80211_HT_CAP_SM_PS_SHIFT;
487 break;
488 case IEEE80211_SMPS_STATIC:
489 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
490 IEEE80211_HT_CAP_SM_PS_SHIFT;
491 break;
492 case IEEE80211_SMPS_DYNAMIC:
493 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
494 IEEE80211_HT_CAP_SM_PS_SHIFT;
495 break;
496 }
497
498 /* reserve and fill IE */
499 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
500 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
501 }
502
503 /* This function determines vht capability flags for the association
504 * and builds the IE.
505 * Note - the function may set the owner of the MU-MIMO capability
506 */
507 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
508 struct sk_buff *skb,
509 struct ieee80211_supported_band *sband,
510 struct ieee80211_vht_cap *ap_vht_cap)
511 {
512 struct ieee80211_local *local = sdata->local;
513 u8 *pos;
514 u32 cap;
515 struct ieee80211_sta_vht_cap vht_cap;
516 u32 mask, ap_bf_sts, our_bf_sts;
517
518 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
519
520 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
521 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
522
523 /* determine capability flags */
524 cap = vht_cap.cap;
525
526 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
527 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
528
529 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
530 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
531 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
532 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
533 }
534
535 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
536 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
537 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
538 }
539
540 /*
541 * Some APs apparently get confused if our capabilities are better
542 * than theirs, so restrict what we advertise in the assoc request.
543 */
544 if (!(ap_vht_cap->vht_cap_info &
545 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
546 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
547 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
548 else if (!(ap_vht_cap->vht_cap_info &
549 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
550 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
551
552 /*
553 * If some other vif is using the MU-MIMO capablity we cannot associate
554 * using MU-MIMO - this will lead to contradictions in the group-id
555 * mechanism.
556 * Ownership is defined since association request, in order to avoid
557 * simultaneous associations with MU-MIMO.
558 */
559 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
560 bool disable_mu_mimo = false;
561 struct ieee80211_sub_if_data *other;
562
563 list_for_each_entry_rcu(other, &local->interfaces, list) {
564 if (other->vif.mu_mimo_owner) {
565 disable_mu_mimo = true;
566 break;
567 }
568 }
569 if (disable_mu_mimo)
570 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
571 else
572 sdata->vif.mu_mimo_owner = true;
573 }
574
575 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
576
577 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
578 our_bf_sts = cap & mask;
579
580 if (ap_bf_sts < our_bf_sts) {
581 cap &= ~mask;
582 cap |= ap_bf_sts;
583 }
584
585 /* reserve and fill IE */
586 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
587 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
588 }
589
590 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
591 {
592 struct ieee80211_local *local = sdata->local;
593 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
594 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
595 struct sk_buff *skb;
596 struct ieee80211_mgmt *mgmt;
597 u8 *pos, qos_info;
598 size_t offset = 0, noffset;
599 int i, count, rates_len, supp_rates_len, shift;
600 u16 capab;
601 struct ieee80211_supported_band *sband;
602 struct ieee80211_chanctx_conf *chanctx_conf;
603 struct ieee80211_channel *chan;
604 u32 rate_flags, rates = 0;
605
606 sdata_assert_lock(sdata);
607
608 rcu_read_lock();
609 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
610 if (WARN_ON(!chanctx_conf)) {
611 rcu_read_unlock();
612 return;
613 }
614 chan = chanctx_conf->def.chan;
615 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
616 rcu_read_unlock();
617 sband = local->hw.wiphy->bands[chan->band];
618 shift = ieee80211_vif_get_shift(&sdata->vif);
619
620 if (assoc_data->supp_rates_len) {
621 /*
622 * Get all rates supported by the device and the AP as
623 * some APs don't like getting a superset of their rates
624 * in the association request (e.g. D-Link DAP 1353 in
625 * b-only mode)...
626 */
627 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
628 assoc_data->supp_rates,
629 assoc_data->supp_rates_len,
630 &rates);
631 } else {
632 /*
633 * In case AP not provide any supported rates information
634 * before association, we send information element(s) with
635 * all rates that we support.
636 */
637 rates_len = 0;
638 for (i = 0; i < sband->n_bitrates; i++) {
639 if ((rate_flags & sband->bitrates[i].flags)
640 != rate_flags)
641 continue;
642 rates |= BIT(i);
643 rates_len++;
644 }
645 }
646
647 skb = alloc_skb(local->hw.extra_tx_headroom +
648 sizeof(*mgmt) + /* bit too much but doesn't matter */
649 2 + assoc_data->ssid_len + /* SSID */
650 4 + rates_len + /* (extended) rates */
651 4 + /* power capability */
652 2 + 2 * sband->n_channels + /* supported channels */
653 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
654 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
655 assoc_data->ie_len + /* extra IEs */
656 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
657 9, /* WMM */
658 GFP_KERNEL);
659 if (!skb)
660 return;
661
662 skb_reserve(skb, local->hw.extra_tx_headroom);
663
664 capab = WLAN_CAPABILITY_ESS;
665
666 if (sband->band == NL80211_BAND_2GHZ) {
667 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
668 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
669 }
670
671 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
672 capab |= WLAN_CAPABILITY_PRIVACY;
673
674 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
675 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
676 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
677
678 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
679 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
680
681 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
682 memset(mgmt, 0, 24);
683 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
684 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
685 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
686
687 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
688 skb_put(skb, 10);
689 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
690 IEEE80211_STYPE_REASSOC_REQ);
691 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
692 mgmt->u.reassoc_req.listen_interval =
693 cpu_to_le16(local->hw.conf.listen_interval);
694 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
695 ETH_ALEN);
696 } else {
697 skb_put(skb, 4);
698 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
699 IEEE80211_STYPE_ASSOC_REQ);
700 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
701 mgmt->u.assoc_req.listen_interval =
702 cpu_to_le16(local->hw.conf.listen_interval);
703 }
704
705 /* SSID */
706 pos = skb_put(skb, 2 + assoc_data->ssid_len);
707 *pos++ = WLAN_EID_SSID;
708 *pos++ = assoc_data->ssid_len;
709 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
710
711 /* add all rates which were marked to be used above */
712 supp_rates_len = rates_len;
713 if (supp_rates_len > 8)
714 supp_rates_len = 8;
715
716 pos = skb_put(skb, supp_rates_len + 2);
717 *pos++ = WLAN_EID_SUPP_RATES;
718 *pos++ = supp_rates_len;
719
720 count = 0;
721 for (i = 0; i < sband->n_bitrates; i++) {
722 if (BIT(i) & rates) {
723 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
724 5 * (1 << shift));
725 *pos++ = (u8) rate;
726 if (++count == 8)
727 break;
728 }
729 }
730
731 if (rates_len > count) {
732 pos = skb_put(skb, rates_len - count + 2);
733 *pos++ = WLAN_EID_EXT_SUPP_RATES;
734 *pos++ = rates_len - count;
735
736 for (i++; i < sband->n_bitrates; i++) {
737 if (BIT(i) & rates) {
738 int rate;
739 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
740 5 * (1 << shift));
741 *pos++ = (u8) rate;
742 }
743 }
744 }
745
746 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
747 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
748 pos = skb_put(skb, 4);
749 *pos++ = WLAN_EID_PWR_CAPABILITY;
750 *pos++ = 2;
751 *pos++ = 0; /* min tx power */
752 /* max tx power */
753 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
754 }
755
756 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
757 /* TODO: get this in reg domain format */
758 pos = skb_put(skb, 2 * sband->n_channels + 2);
759 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
760 *pos++ = 2 * sband->n_channels;
761 for (i = 0; i < sband->n_channels; i++) {
762 *pos++ = ieee80211_frequency_to_channel(
763 sband->channels[i].center_freq);
764 *pos++ = 1; /* one channel in the subband*/
765 }
766 }
767
768 /* if present, add any custom IEs that go before HT */
769 if (assoc_data->ie_len) {
770 static const u8 before_ht[] = {
771 WLAN_EID_SSID,
772 WLAN_EID_SUPP_RATES,
773 WLAN_EID_EXT_SUPP_RATES,
774 WLAN_EID_PWR_CAPABILITY,
775 WLAN_EID_SUPPORTED_CHANNELS,
776 WLAN_EID_RSN,
777 WLAN_EID_QOS_CAPA,
778 WLAN_EID_RRM_ENABLED_CAPABILITIES,
779 WLAN_EID_MOBILITY_DOMAIN,
780 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
781 WLAN_EID_RIC_DATA, /* reassoc only */
782 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
783 };
784 static const u8 after_ric[] = {
785 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
786 WLAN_EID_HT_CAPABILITY,
787 WLAN_EID_BSS_COEX_2040,
788 WLAN_EID_EXT_CAPABILITY,
789 WLAN_EID_QOS_TRAFFIC_CAPA,
790 WLAN_EID_TIM_BCAST_REQ,
791 WLAN_EID_INTERWORKING,
792 /* 60GHz doesn't happen right now */
793 WLAN_EID_VHT_CAPABILITY,
794 WLAN_EID_OPMODE_NOTIF,
795 };
796
797 noffset = ieee80211_ie_split_ric(assoc_data->ie,
798 assoc_data->ie_len,
799 before_ht,
800 ARRAY_SIZE(before_ht),
801 after_ric,
802 ARRAY_SIZE(after_ric),
803 offset);
804 pos = skb_put(skb, noffset - offset);
805 memcpy(pos, assoc_data->ie + offset, noffset - offset);
806 offset = noffset;
807 }
808
809 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
810 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
811 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
812
813 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
814 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
815 sband, chan, sdata->smps_mode);
816
817 /* if present, add any custom IEs that go before VHT */
818 if (assoc_data->ie_len) {
819 static const u8 before_vht[] = {
820 WLAN_EID_SSID,
821 WLAN_EID_SUPP_RATES,
822 WLAN_EID_EXT_SUPP_RATES,
823 WLAN_EID_PWR_CAPABILITY,
824 WLAN_EID_SUPPORTED_CHANNELS,
825 WLAN_EID_RSN,
826 WLAN_EID_QOS_CAPA,
827 WLAN_EID_RRM_ENABLED_CAPABILITIES,
828 WLAN_EID_MOBILITY_DOMAIN,
829 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
830 WLAN_EID_HT_CAPABILITY,
831 WLAN_EID_BSS_COEX_2040,
832 WLAN_EID_EXT_CAPABILITY,
833 WLAN_EID_QOS_TRAFFIC_CAPA,
834 WLAN_EID_TIM_BCAST_REQ,
835 WLAN_EID_INTERWORKING,
836 };
837
838 /* RIC already taken above, so no need to handle here anymore */
839 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
840 before_vht, ARRAY_SIZE(before_vht),
841 offset);
842 pos = skb_put(skb, noffset - offset);
843 memcpy(pos, assoc_data->ie + offset, noffset - offset);
844 offset = noffset;
845 }
846
847 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
848 ieee80211_add_vht_ie(sdata, skb, sband,
849 &assoc_data->ap_vht_cap);
850
851 /* if present, add any custom non-vendor IEs that go after HT */
852 if (assoc_data->ie_len) {
853 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
854 assoc_data->ie_len,
855 offset);
856 pos = skb_put(skb, noffset - offset);
857 memcpy(pos, assoc_data->ie + offset, noffset - offset);
858 offset = noffset;
859 }
860
861 if (assoc_data->wmm) {
862 if (assoc_data->uapsd) {
863 qos_info = ifmgd->uapsd_queues;
864 qos_info |= (ifmgd->uapsd_max_sp_len <<
865 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
866 } else {
867 qos_info = 0;
868 }
869
870 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
871 }
872
873 /* add any remaining custom (i.e. vendor specific here) IEs */
874 if (assoc_data->ie_len) {
875 noffset = assoc_data->ie_len;
876 pos = skb_put(skb, noffset - offset);
877 memcpy(pos, assoc_data->ie + offset, noffset - offset);
878 }
879
880 if (assoc_data->fils_kek_len &&
881 fils_encrypt_assoc_req(skb, assoc_data) < 0) {
882 dev_kfree_skb(skb);
883 return;
884 }
885
886 drv_mgd_prepare_tx(local, sdata);
887
888 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
889 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
890 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
891 IEEE80211_TX_INTFL_MLME_CONN_TX;
892 ieee80211_tx_skb(sdata, skb);
893 }
894
895 void ieee80211_send_pspoll(struct ieee80211_local *local,
896 struct ieee80211_sub_if_data *sdata)
897 {
898 struct ieee80211_pspoll *pspoll;
899 struct sk_buff *skb;
900
901 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
902 if (!skb)
903 return;
904
905 pspoll = (struct ieee80211_pspoll *) skb->data;
906 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
907
908 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
909 ieee80211_tx_skb(sdata, skb);
910 }
911
912 void ieee80211_send_nullfunc(struct ieee80211_local *local,
913 struct ieee80211_sub_if_data *sdata,
914 bool powersave)
915 {
916 struct sk_buff *skb;
917 struct ieee80211_hdr_3addr *nullfunc;
918 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
919
920 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
921 if (!skb)
922 return;
923
924 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
925 if (powersave)
926 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
927
928 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
929 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
930
931 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
932 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
933
934 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
935 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
936
937 ieee80211_tx_skb(sdata, skb);
938 }
939
940 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
941 struct ieee80211_sub_if_data *sdata)
942 {
943 struct sk_buff *skb;
944 struct ieee80211_hdr *nullfunc;
945 __le16 fc;
946
947 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
948 return;
949
950 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
951 if (!skb)
952 return;
953
954 skb_reserve(skb, local->hw.extra_tx_headroom);
955
956 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
957 memset(nullfunc, 0, 30);
958 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
959 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
960 nullfunc->frame_control = fc;
961 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
962 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
963 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
964 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
965
966 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
967 ieee80211_tx_skb(sdata, skb);
968 }
969
970 /* spectrum management related things */
971 static void ieee80211_chswitch_work(struct work_struct *work)
972 {
973 struct ieee80211_sub_if_data *sdata =
974 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
975 struct ieee80211_local *local = sdata->local;
976 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
977 int ret;
978
979 if (!ieee80211_sdata_running(sdata))
980 return;
981
982 sdata_lock(sdata);
983 mutex_lock(&local->mtx);
984 mutex_lock(&local->chanctx_mtx);
985
986 if (!ifmgd->associated)
987 goto out;
988
989 if (!sdata->vif.csa_active)
990 goto out;
991
992 /*
993 * using reservation isn't immediate as it may be deferred until later
994 * with multi-vif. once reservation is complete it will re-schedule the
995 * work with no reserved_chanctx so verify chandef to check if it
996 * completed successfully
997 */
998
999 if (sdata->reserved_chanctx) {
1000 /*
1001 * with multi-vif csa driver may call ieee80211_csa_finish()
1002 * many times while waiting for other interfaces to use their
1003 * reservations
1004 */
1005 if (sdata->reserved_ready)
1006 goto out;
1007
1008 ret = ieee80211_vif_use_reserved_context(sdata);
1009 if (ret) {
1010 sdata_info(sdata,
1011 "failed to use reserved channel context, disconnecting (err=%d)\n",
1012 ret);
1013 ieee80211_queue_work(&sdata->local->hw,
1014 &ifmgd->csa_connection_drop_work);
1015 goto out;
1016 }
1017
1018 goto out;
1019 }
1020
1021 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1022 &sdata->csa_chandef)) {
1023 sdata_info(sdata,
1024 "failed to finalize channel switch, disconnecting\n");
1025 ieee80211_queue_work(&sdata->local->hw,
1026 &ifmgd->csa_connection_drop_work);
1027 goto out;
1028 }
1029
1030 /* XXX: shouldn't really modify cfg80211-owned data! */
1031 ifmgd->associated->channel = sdata->csa_chandef.chan;
1032
1033 ifmgd->csa_waiting_bcn = true;
1034
1035 ieee80211_sta_reset_beacon_monitor(sdata);
1036 ieee80211_sta_reset_conn_monitor(sdata);
1037
1038 out:
1039 mutex_unlock(&local->chanctx_mtx);
1040 mutex_unlock(&local->mtx);
1041 sdata_unlock(sdata);
1042 }
1043
1044 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1045 {
1046 struct ieee80211_local *local = sdata->local;
1047 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1048 int ret;
1049
1050 sdata_assert_lock(sdata);
1051
1052 WARN_ON(!sdata->vif.csa_active);
1053
1054 if (sdata->csa_block_tx) {
1055 ieee80211_wake_vif_queues(local, sdata,
1056 IEEE80211_QUEUE_STOP_REASON_CSA);
1057 sdata->csa_block_tx = false;
1058 }
1059
1060 sdata->vif.csa_active = false;
1061 ifmgd->csa_waiting_bcn = false;
1062
1063 ret = drv_post_channel_switch(sdata);
1064 if (ret) {
1065 sdata_info(sdata,
1066 "driver post channel switch failed, disconnecting\n");
1067 ieee80211_queue_work(&local->hw,
1068 &ifmgd->csa_connection_drop_work);
1069 return;
1070 }
1071
1072 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1073 }
1074
1075 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1076 {
1077 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1078 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1079
1080 trace_api_chswitch_done(sdata, success);
1081 if (!success) {
1082 sdata_info(sdata,
1083 "driver channel switch failed, disconnecting\n");
1084 ieee80211_queue_work(&sdata->local->hw,
1085 &ifmgd->csa_connection_drop_work);
1086 } else {
1087 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1088 }
1089 }
1090 EXPORT_SYMBOL(ieee80211_chswitch_done);
1091
1092 static void ieee80211_chswitch_timer(unsigned long data)
1093 {
1094 struct ieee80211_sub_if_data *sdata =
1095 (struct ieee80211_sub_if_data *) data;
1096
1097 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1098 }
1099
1100 static void
1101 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1102 u64 timestamp, u32 device_timestamp,
1103 struct ieee802_11_elems *elems,
1104 bool beacon)
1105 {
1106 struct ieee80211_local *local = sdata->local;
1107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1108 struct cfg80211_bss *cbss = ifmgd->associated;
1109 struct ieee80211_chanctx_conf *conf;
1110 struct ieee80211_chanctx *chanctx;
1111 enum nl80211_band current_band;
1112 struct ieee80211_csa_ie csa_ie;
1113 struct ieee80211_channel_switch ch_switch;
1114 int res;
1115
1116 sdata_assert_lock(sdata);
1117
1118 if (!cbss)
1119 return;
1120
1121 if (local->scanning)
1122 return;
1123
1124 /* disregard subsequent announcements if we are already processing */
1125 if (sdata->vif.csa_active)
1126 return;
1127
1128 current_band = cbss->channel->band;
1129 memset(&csa_ie, 0, sizeof(csa_ie));
1130 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1131 ifmgd->flags,
1132 ifmgd->associated->bssid, &csa_ie);
1133 if (res < 0)
1134 ieee80211_queue_work(&local->hw,
1135 &ifmgd->csa_connection_drop_work);
1136 if (res)
1137 return;
1138
1139 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1140 IEEE80211_CHAN_DISABLED)) {
1141 sdata_info(sdata,
1142 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1143 ifmgd->associated->bssid,
1144 csa_ie.chandef.chan->center_freq,
1145 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1146 csa_ie.chandef.center_freq2);
1147 ieee80211_queue_work(&local->hw,
1148 &ifmgd->csa_connection_drop_work);
1149 return;
1150 }
1151
1152 if (cfg80211_chandef_identical(&csa_ie.chandef,
1153 &sdata->vif.bss_conf.chandef)) {
1154 if (ifmgd->csa_ignored_same_chan)
1155 return;
1156 sdata_info(sdata,
1157 "AP %pM tries to chanswitch to same channel, ignore\n",
1158 ifmgd->associated->bssid);
1159 ifmgd->csa_ignored_same_chan = true;
1160 return;
1161 }
1162
1163 /*
1164 * Drop all TDLS peers - either we disconnect or move to a different
1165 * channel from this point on. There's no telling what our peer will do.
1166 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1167 * have an incompatible wider chandef.
1168 */
1169 ieee80211_teardown_tdls_peers(sdata);
1170
1171 mutex_lock(&local->mtx);
1172 mutex_lock(&local->chanctx_mtx);
1173 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1174 lockdep_is_held(&local->chanctx_mtx));
1175 if (!conf) {
1176 sdata_info(sdata,
1177 "no channel context assigned to vif?, disconnecting\n");
1178 goto drop_connection;
1179 }
1180
1181 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1182
1183 if (local->use_chanctx &&
1184 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1185 sdata_info(sdata,
1186 "driver doesn't support chan-switch with channel contexts\n");
1187 goto drop_connection;
1188 }
1189
1190 ch_switch.timestamp = timestamp;
1191 ch_switch.device_timestamp = device_timestamp;
1192 ch_switch.block_tx = csa_ie.mode;
1193 ch_switch.chandef = csa_ie.chandef;
1194 ch_switch.count = csa_ie.count;
1195
1196 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1197 sdata_info(sdata,
1198 "preparing for channel switch failed, disconnecting\n");
1199 goto drop_connection;
1200 }
1201
1202 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1203 chanctx->mode, false);
1204 if (res) {
1205 sdata_info(sdata,
1206 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1207 res);
1208 goto drop_connection;
1209 }
1210 mutex_unlock(&local->chanctx_mtx);
1211
1212 sdata->vif.csa_active = true;
1213 sdata->csa_chandef = csa_ie.chandef;
1214 sdata->csa_block_tx = csa_ie.mode;
1215 ifmgd->csa_ignored_same_chan = false;
1216
1217 if (sdata->csa_block_tx)
1218 ieee80211_stop_vif_queues(local, sdata,
1219 IEEE80211_QUEUE_STOP_REASON_CSA);
1220 mutex_unlock(&local->mtx);
1221
1222 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1223 csa_ie.count);
1224
1225 if (local->ops->channel_switch) {
1226 /* use driver's channel switch callback */
1227 drv_channel_switch(local, sdata, &ch_switch);
1228 return;
1229 }
1230
1231 /* channel switch handled in software */
1232 if (csa_ie.count <= 1)
1233 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1234 else
1235 mod_timer(&ifmgd->chswitch_timer,
1236 TU_TO_EXP_TIME((csa_ie.count - 1) *
1237 cbss->beacon_interval));
1238 return;
1239 drop_connection:
1240 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1241 mutex_unlock(&local->chanctx_mtx);
1242 mutex_unlock(&local->mtx);
1243 }
1244
1245 static bool
1246 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1247 struct ieee80211_channel *channel,
1248 const u8 *country_ie, u8 country_ie_len,
1249 const u8 *pwr_constr_elem,
1250 int *chan_pwr, int *pwr_reduction)
1251 {
1252 struct ieee80211_country_ie_triplet *triplet;
1253 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1254 int i, chan_increment;
1255 bool have_chan_pwr = false;
1256
1257 /* Invalid IE */
1258 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1259 return false;
1260
1261 triplet = (void *)(country_ie + 3);
1262 country_ie_len -= 3;
1263
1264 switch (channel->band) {
1265 default:
1266 WARN_ON_ONCE(1);
1267 /* fall through */
1268 case NL80211_BAND_2GHZ:
1269 case NL80211_BAND_60GHZ:
1270 chan_increment = 1;
1271 break;
1272 case NL80211_BAND_5GHZ:
1273 chan_increment = 4;
1274 break;
1275 }
1276
1277 /* find channel */
1278 while (country_ie_len >= 3) {
1279 u8 first_channel = triplet->chans.first_channel;
1280
1281 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1282 goto next;
1283
1284 for (i = 0; i < triplet->chans.num_channels; i++) {
1285 if (first_channel + i * chan_increment == chan) {
1286 have_chan_pwr = true;
1287 *chan_pwr = triplet->chans.max_power;
1288 break;
1289 }
1290 }
1291 if (have_chan_pwr)
1292 break;
1293
1294 next:
1295 triplet++;
1296 country_ie_len -= 3;
1297 }
1298
1299 if (have_chan_pwr && pwr_constr_elem)
1300 *pwr_reduction = *pwr_constr_elem;
1301 else
1302 *pwr_reduction = 0;
1303
1304 return have_chan_pwr;
1305 }
1306
1307 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1308 struct ieee80211_channel *channel,
1309 const u8 *cisco_dtpc_ie,
1310 int *pwr_level)
1311 {
1312 /* From practical testing, the first data byte of the DTPC element
1313 * seems to contain the requested dBm level, and the CLI on Cisco
1314 * APs clearly state the range is -127 to 127 dBm, which indicates
1315 * a signed byte, although it seemingly never actually goes negative.
1316 * The other byte seems to always be zero.
1317 */
1318 *pwr_level = (__s8)cisco_dtpc_ie[4];
1319 }
1320
1321 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1322 struct ieee80211_channel *channel,
1323 struct ieee80211_mgmt *mgmt,
1324 const u8 *country_ie, u8 country_ie_len,
1325 const u8 *pwr_constr_ie,
1326 const u8 *cisco_dtpc_ie)
1327 {
1328 bool has_80211h_pwr = false, has_cisco_pwr = false;
1329 int chan_pwr = 0, pwr_reduction_80211h = 0;
1330 int pwr_level_cisco, pwr_level_80211h;
1331 int new_ap_level;
1332 __le16 capab = mgmt->u.probe_resp.capab_info;
1333
1334 if (country_ie &&
1335 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1336 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1337 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1338 sdata, channel, country_ie, country_ie_len,
1339 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1340 pwr_level_80211h =
1341 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1342 }
1343
1344 if (cisco_dtpc_ie) {
1345 ieee80211_find_cisco_dtpc(
1346 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1347 has_cisco_pwr = true;
1348 }
1349
1350 if (!has_80211h_pwr && !has_cisco_pwr)
1351 return 0;
1352
1353 /* If we have both 802.11h and Cisco DTPC, apply both limits
1354 * by picking the smallest of the two power levels advertised.
1355 */
1356 if (has_80211h_pwr &&
1357 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1358 new_ap_level = pwr_level_80211h;
1359
1360 if (sdata->ap_power_level == new_ap_level)
1361 return 0;
1362
1363 sdata_dbg(sdata,
1364 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1365 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1366 sdata->u.mgd.bssid);
1367 } else { /* has_cisco_pwr is always true here. */
1368 new_ap_level = pwr_level_cisco;
1369
1370 if (sdata->ap_power_level == new_ap_level)
1371 return 0;
1372
1373 sdata_dbg(sdata,
1374 "Limiting TX power to %d dBm as advertised by %pM\n",
1375 pwr_level_cisco, sdata->u.mgd.bssid);
1376 }
1377
1378 sdata->ap_power_level = new_ap_level;
1379 if (__ieee80211_recalc_txpower(sdata))
1380 return BSS_CHANGED_TXPOWER;
1381 return 0;
1382 }
1383
1384 /* powersave */
1385 static void ieee80211_enable_ps(struct ieee80211_local *local,
1386 struct ieee80211_sub_if_data *sdata)
1387 {
1388 struct ieee80211_conf *conf = &local->hw.conf;
1389
1390 /*
1391 * If we are scanning right now then the parameters will
1392 * take effect when scan finishes.
1393 */
1394 if (local->scanning)
1395 return;
1396
1397 if (conf->dynamic_ps_timeout > 0 &&
1398 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1399 mod_timer(&local->dynamic_ps_timer, jiffies +
1400 msecs_to_jiffies(conf->dynamic_ps_timeout));
1401 } else {
1402 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1403 ieee80211_send_nullfunc(local, sdata, true);
1404
1405 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1406 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1407 return;
1408
1409 conf->flags |= IEEE80211_CONF_PS;
1410 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1411 }
1412 }
1413
1414 static void ieee80211_change_ps(struct ieee80211_local *local)
1415 {
1416 struct ieee80211_conf *conf = &local->hw.conf;
1417
1418 if (local->ps_sdata) {
1419 ieee80211_enable_ps(local, local->ps_sdata);
1420 } else if (conf->flags & IEEE80211_CONF_PS) {
1421 conf->flags &= ~IEEE80211_CONF_PS;
1422 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1423 del_timer_sync(&local->dynamic_ps_timer);
1424 cancel_work_sync(&local->dynamic_ps_enable_work);
1425 }
1426 }
1427
1428 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1429 {
1430 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1431 struct sta_info *sta = NULL;
1432 bool authorized = false;
1433
1434 if (!mgd->powersave)
1435 return false;
1436
1437 if (mgd->broken_ap)
1438 return false;
1439
1440 if (!mgd->associated)
1441 return false;
1442
1443 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1444 return false;
1445
1446 if (!mgd->have_beacon)
1447 return false;
1448
1449 rcu_read_lock();
1450 sta = sta_info_get(sdata, mgd->bssid);
1451 if (sta)
1452 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1453 rcu_read_unlock();
1454
1455 return authorized;
1456 }
1457
1458 /* need to hold RTNL or interface lock */
1459 void ieee80211_recalc_ps(struct ieee80211_local *local)
1460 {
1461 struct ieee80211_sub_if_data *sdata, *found = NULL;
1462 int count = 0;
1463 int timeout;
1464
1465 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1466 local->ps_sdata = NULL;
1467 return;
1468 }
1469
1470 list_for_each_entry(sdata, &local->interfaces, list) {
1471 if (!ieee80211_sdata_running(sdata))
1472 continue;
1473 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1474 /* If an AP vif is found, then disable PS
1475 * by setting the count to zero thereby setting
1476 * ps_sdata to NULL.
1477 */
1478 count = 0;
1479 break;
1480 }
1481 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1482 continue;
1483 found = sdata;
1484 count++;
1485 }
1486
1487 if (count == 1 && ieee80211_powersave_allowed(found)) {
1488 u8 dtimper = found->u.mgd.dtim_period;
1489
1490 timeout = local->dynamic_ps_forced_timeout;
1491 if (timeout < 0)
1492 timeout = 100;
1493 local->hw.conf.dynamic_ps_timeout = timeout;
1494
1495 /* If the TIM IE is invalid, pretend the value is 1 */
1496 if (!dtimper)
1497 dtimper = 1;
1498
1499 local->hw.conf.ps_dtim_period = dtimper;
1500 local->ps_sdata = found;
1501 } else {
1502 local->ps_sdata = NULL;
1503 }
1504
1505 ieee80211_change_ps(local);
1506 }
1507
1508 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1509 {
1510 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1511
1512 if (sdata->vif.bss_conf.ps != ps_allowed) {
1513 sdata->vif.bss_conf.ps = ps_allowed;
1514 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1515 }
1516 }
1517
1518 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1519 {
1520 struct ieee80211_local *local =
1521 container_of(work, struct ieee80211_local,
1522 dynamic_ps_disable_work);
1523
1524 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1525 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1526 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1527 }
1528
1529 ieee80211_wake_queues_by_reason(&local->hw,
1530 IEEE80211_MAX_QUEUE_MAP,
1531 IEEE80211_QUEUE_STOP_REASON_PS,
1532 false);
1533 }
1534
1535 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1536 {
1537 struct ieee80211_local *local =
1538 container_of(work, struct ieee80211_local,
1539 dynamic_ps_enable_work);
1540 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1541 struct ieee80211_if_managed *ifmgd;
1542 unsigned long flags;
1543 int q;
1544
1545 /* can only happen when PS was just disabled anyway */
1546 if (!sdata)
1547 return;
1548
1549 ifmgd = &sdata->u.mgd;
1550
1551 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1552 return;
1553
1554 if (local->hw.conf.dynamic_ps_timeout > 0) {
1555 /* don't enter PS if TX frames are pending */
1556 if (drv_tx_frames_pending(local)) {
1557 mod_timer(&local->dynamic_ps_timer, jiffies +
1558 msecs_to_jiffies(
1559 local->hw.conf.dynamic_ps_timeout));
1560 return;
1561 }
1562
1563 /*
1564 * transmission can be stopped by others which leads to
1565 * dynamic_ps_timer expiry. Postpone the ps timer if it
1566 * is not the actual idle state.
1567 */
1568 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1569 for (q = 0; q < local->hw.queues; q++) {
1570 if (local->queue_stop_reasons[q]) {
1571 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1572 flags);
1573 mod_timer(&local->dynamic_ps_timer, jiffies +
1574 msecs_to_jiffies(
1575 local->hw.conf.dynamic_ps_timeout));
1576 return;
1577 }
1578 }
1579 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1580 }
1581
1582 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1583 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1584 if (drv_tx_frames_pending(local)) {
1585 mod_timer(&local->dynamic_ps_timer, jiffies +
1586 msecs_to_jiffies(
1587 local->hw.conf.dynamic_ps_timeout));
1588 } else {
1589 ieee80211_send_nullfunc(local, sdata, true);
1590 /* Flush to get the tx status of nullfunc frame */
1591 ieee80211_flush_queues(local, sdata, false);
1592 }
1593 }
1594
1595 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1596 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1597 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1598 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1599 local->hw.conf.flags |= IEEE80211_CONF_PS;
1600 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1601 }
1602 }
1603
1604 void ieee80211_dynamic_ps_timer(unsigned long data)
1605 {
1606 struct ieee80211_local *local = (void *) data;
1607
1608 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1609 }
1610
1611 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1612 {
1613 struct delayed_work *delayed_work = to_delayed_work(work);
1614 struct ieee80211_sub_if_data *sdata =
1615 container_of(delayed_work, struct ieee80211_sub_if_data,
1616 dfs_cac_timer_work);
1617 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1618
1619 mutex_lock(&sdata->local->mtx);
1620 if (sdata->wdev.cac_started) {
1621 ieee80211_vif_release_channel(sdata);
1622 cfg80211_cac_event(sdata->dev, &chandef,
1623 NL80211_RADAR_CAC_FINISHED,
1624 GFP_KERNEL);
1625 }
1626 mutex_unlock(&sdata->local->mtx);
1627 }
1628
1629 static bool
1630 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1631 {
1632 struct ieee80211_local *local = sdata->local;
1633 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1634 bool ret = false;
1635 int ac;
1636
1637 if (local->hw.queues < IEEE80211_NUM_ACS)
1638 return false;
1639
1640 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1641 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1642 int non_acm_ac;
1643 unsigned long now = jiffies;
1644
1645 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1646 tx_tspec->admitted_time &&
1647 time_after(now, tx_tspec->time_slice_start + HZ)) {
1648 tx_tspec->consumed_tx_time = 0;
1649 tx_tspec->time_slice_start = now;
1650
1651 if (tx_tspec->downgraded)
1652 tx_tspec->action =
1653 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1654 }
1655
1656 switch (tx_tspec->action) {
1657 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1658 /* take the original parameters */
1659 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1660 sdata_err(sdata,
1661 "failed to set TX queue parameters for queue %d\n",
1662 ac);
1663 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1664 tx_tspec->downgraded = false;
1665 ret = true;
1666 break;
1667 case TX_TSPEC_ACTION_DOWNGRADE:
1668 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1669 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1670 ret = true;
1671 break;
1672 }
1673 /* downgrade next lower non-ACM AC */
1674 for (non_acm_ac = ac + 1;
1675 non_acm_ac < IEEE80211_NUM_ACS;
1676 non_acm_ac++)
1677 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1678 break;
1679 /* Usually the loop will result in using BK even if it
1680 * requires admission control, but such a configuration
1681 * makes no sense and we have to transmit somehow - the
1682 * AC selection does the same thing.
1683 * If we started out trying to downgrade from BK, then
1684 * the extra condition here might be needed.
1685 */
1686 if (non_acm_ac >= IEEE80211_NUM_ACS)
1687 non_acm_ac = IEEE80211_AC_BK;
1688 if (drv_conf_tx(local, sdata, ac,
1689 &sdata->tx_conf[non_acm_ac]))
1690 sdata_err(sdata,
1691 "failed to set TX queue parameters for queue %d\n",
1692 ac);
1693 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1694 ret = true;
1695 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1696 tx_tspec->time_slice_start + HZ - now + 1);
1697 break;
1698 case TX_TSPEC_ACTION_NONE:
1699 /* nothing now */
1700 break;
1701 }
1702 }
1703
1704 return ret;
1705 }
1706
1707 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1708 {
1709 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1710 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1711 }
1712
1713 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1714 {
1715 struct ieee80211_sub_if_data *sdata;
1716
1717 sdata = container_of(work, struct ieee80211_sub_if_data,
1718 u.mgd.tx_tspec_wk.work);
1719 ieee80211_sta_handle_tspec_ac_params(sdata);
1720 }
1721
1722 /* MLME */
1723 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1724 struct ieee80211_sub_if_data *sdata,
1725 const u8 *wmm_param, size_t wmm_param_len)
1726 {
1727 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1728 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1729 size_t left;
1730 int count, ac;
1731 const u8 *pos;
1732 u8 uapsd_queues = 0;
1733
1734 if (!local->ops->conf_tx)
1735 return false;
1736
1737 if (local->hw.queues < IEEE80211_NUM_ACS)
1738 return false;
1739
1740 if (!wmm_param)
1741 return false;
1742
1743 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1744 return false;
1745
1746 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1747 uapsd_queues = ifmgd->uapsd_queues;
1748
1749 count = wmm_param[6] & 0x0f;
1750 if (count == ifmgd->wmm_last_param_set)
1751 return false;
1752 ifmgd->wmm_last_param_set = count;
1753
1754 pos = wmm_param + 8;
1755 left = wmm_param_len - 8;
1756
1757 memset(&params, 0, sizeof(params));
1758
1759 sdata->wmm_acm = 0;
1760 for (; left >= 4; left -= 4, pos += 4) {
1761 int aci = (pos[0] >> 5) & 0x03;
1762 int acm = (pos[0] >> 4) & 0x01;
1763 bool uapsd = false;
1764
1765 switch (aci) {
1766 case 1: /* AC_BK */
1767 ac = IEEE80211_AC_BK;
1768 if (acm)
1769 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1770 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1771 uapsd = true;
1772 break;
1773 case 2: /* AC_VI */
1774 ac = IEEE80211_AC_VI;
1775 if (acm)
1776 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1777 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1778 uapsd = true;
1779 break;
1780 case 3: /* AC_VO */
1781 ac = IEEE80211_AC_VO;
1782 if (acm)
1783 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1784 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1785 uapsd = true;
1786 break;
1787 case 0: /* AC_BE */
1788 default:
1789 ac = IEEE80211_AC_BE;
1790 if (acm)
1791 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1792 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1793 uapsd = true;
1794 break;
1795 }
1796
1797 params[ac].aifs = pos[0] & 0x0f;
1798
1799 if (params[ac].aifs < 2) {
1800 sdata_info(sdata,
1801 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1802 params[ac].aifs, aci);
1803 params[ac].aifs = 2;
1804 }
1805 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1806 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1807 params[ac].txop = get_unaligned_le16(pos + 2);
1808 params[ac].acm = acm;
1809 params[ac].uapsd = uapsd;
1810
1811 if (params[ac].cw_min > params[ac].cw_max) {
1812 sdata_info(sdata,
1813 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1814 params[ac].cw_min, params[ac].cw_max, aci);
1815 return false;
1816 }
1817 }
1818
1819 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1820 mlme_dbg(sdata,
1821 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1822 ac, params[ac].acm,
1823 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1824 params[ac].txop, params[ac].uapsd,
1825 ifmgd->tx_tspec[ac].downgraded);
1826 sdata->tx_conf[ac] = params[ac];
1827 if (!ifmgd->tx_tspec[ac].downgraded &&
1828 drv_conf_tx(local, sdata, ac, &params[ac]))
1829 sdata_err(sdata,
1830 "failed to set TX queue parameters for AC %d\n",
1831 ac);
1832 }
1833
1834 /* enable WMM or activate new settings */
1835 sdata->vif.bss_conf.qos = true;
1836 return true;
1837 }
1838
1839 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1840 {
1841 lockdep_assert_held(&sdata->local->mtx);
1842
1843 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1844 ieee80211_run_deferred_scan(sdata->local);
1845 }
1846
1847 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1848 {
1849 mutex_lock(&sdata->local->mtx);
1850 __ieee80211_stop_poll(sdata);
1851 mutex_unlock(&sdata->local->mtx);
1852 }
1853
1854 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1855 u16 capab, bool erp_valid, u8 erp)
1856 {
1857 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1858 u32 changed = 0;
1859 bool use_protection;
1860 bool use_short_preamble;
1861 bool use_short_slot;
1862
1863 if (erp_valid) {
1864 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1865 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1866 } else {
1867 use_protection = false;
1868 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1869 }
1870
1871 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1872 if (ieee80211_get_sdata_band(sdata) == NL80211_BAND_5GHZ)
1873 use_short_slot = true;
1874
1875 if (use_protection != bss_conf->use_cts_prot) {
1876 bss_conf->use_cts_prot = use_protection;
1877 changed |= BSS_CHANGED_ERP_CTS_PROT;
1878 }
1879
1880 if (use_short_preamble != bss_conf->use_short_preamble) {
1881 bss_conf->use_short_preamble = use_short_preamble;
1882 changed |= BSS_CHANGED_ERP_PREAMBLE;
1883 }
1884
1885 if (use_short_slot != bss_conf->use_short_slot) {
1886 bss_conf->use_short_slot = use_short_slot;
1887 changed |= BSS_CHANGED_ERP_SLOT;
1888 }
1889
1890 return changed;
1891 }
1892
1893 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1894 struct cfg80211_bss *cbss,
1895 u32 bss_info_changed)
1896 {
1897 struct ieee80211_bss *bss = (void *)cbss->priv;
1898 struct ieee80211_local *local = sdata->local;
1899 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1900
1901 bss_info_changed |= BSS_CHANGED_ASSOC;
1902 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1903 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1904
1905 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1906 beacon_loss_count * bss_conf->beacon_int));
1907
1908 sdata->u.mgd.associated = cbss;
1909 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1910
1911 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1912
1913 if (sdata->vif.p2p ||
1914 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
1915 const struct cfg80211_bss_ies *ies;
1916
1917 rcu_read_lock();
1918 ies = rcu_dereference(cbss->ies);
1919 if (ies) {
1920 int ret;
1921
1922 ret = cfg80211_get_p2p_attr(
1923 ies->data, ies->len,
1924 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1925 (u8 *) &bss_conf->p2p_noa_attr,
1926 sizeof(bss_conf->p2p_noa_attr));
1927 if (ret >= 2) {
1928 sdata->u.mgd.p2p_noa_index =
1929 bss_conf->p2p_noa_attr.index;
1930 bss_info_changed |= BSS_CHANGED_P2P_PS;
1931 }
1932 }
1933 rcu_read_unlock();
1934 }
1935
1936 /* just to be sure */
1937 ieee80211_stop_poll(sdata);
1938
1939 ieee80211_led_assoc(local, 1);
1940
1941 if (sdata->u.mgd.have_beacon) {
1942 /*
1943 * If the AP is buggy we may get here with no DTIM period
1944 * known, so assume it's 1 which is the only safe assumption
1945 * in that case, although if the TIM IE is broken powersave
1946 * probably just won't work at all.
1947 */
1948 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1949 bss_conf->beacon_rate = bss->beacon_rate;
1950 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1951 } else {
1952 bss_conf->beacon_rate = NULL;
1953 bss_conf->dtim_period = 0;
1954 }
1955
1956 bss_conf->assoc = 1;
1957
1958 /* Tell the driver to monitor connection quality (if supported) */
1959 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1960 bss_conf->cqm_rssi_thold)
1961 bss_info_changed |= BSS_CHANGED_CQM;
1962
1963 /* Enable ARP filtering */
1964 if (bss_conf->arp_addr_cnt)
1965 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1966
1967 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1968
1969 mutex_lock(&local->iflist_mtx);
1970 ieee80211_recalc_ps(local);
1971 mutex_unlock(&local->iflist_mtx);
1972
1973 ieee80211_recalc_smps(sdata);
1974 ieee80211_recalc_ps_vif(sdata);
1975
1976 netif_carrier_on(sdata->dev);
1977 }
1978
1979 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1980 u16 stype, u16 reason, bool tx,
1981 u8 *frame_buf)
1982 {
1983 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1984 struct ieee80211_local *local = sdata->local;
1985 u32 changed = 0;
1986
1987 sdata_assert_lock(sdata);
1988
1989 if (WARN_ON_ONCE(tx && !frame_buf))
1990 return;
1991
1992 if (WARN_ON(!ifmgd->associated))
1993 return;
1994
1995 ieee80211_stop_poll(sdata);
1996
1997 ifmgd->associated = NULL;
1998 netif_carrier_off(sdata->dev);
1999
2000 /*
2001 * if we want to get out of ps before disassoc (why?) we have
2002 * to do it before sending disassoc, as otherwise the null-packet
2003 * won't be valid.
2004 */
2005 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2006 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2007 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2008 }
2009 local->ps_sdata = NULL;
2010
2011 /* disable per-vif ps */
2012 ieee80211_recalc_ps_vif(sdata);
2013
2014 /* make sure ongoing transmission finishes */
2015 synchronize_net();
2016
2017 /*
2018 * drop any frame before deauth/disassoc, this can be data or
2019 * management frame. Since we are disconnecting, we should not
2020 * insist sending these frames which can take time and delay
2021 * the disconnection and possible the roaming.
2022 */
2023 if (tx)
2024 ieee80211_flush_queues(local, sdata, true);
2025
2026 /* deauthenticate/disassociate now */
2027 if (tx || frame_buf)
2028 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2029 reason, tx, frame_buf);
2030
2031 /* flush out frame - make sure the deauth was actually sent */
2032 if (tx)
2033 ieee80211_flush_queues(local, sdata, false);
2034
2035 /* clear bssid only after building the needed mgmt frames */
2036 eth_zero_addr(ifmgd->bssid);
2037
2038 /* remove AP and TDLS peers */
2039 sta_info_flush(sdata);
2040
2041 /* finally reset all BSS / config parameters */
2042 changed |= ieee80211_reset_erp_info(sdata);
2043
2044 ieee80211_led_assoc(local, 0);
2045 changed |= BSS_CHANGED_ASSOC;
2046 sdata->vif.bss_conf.assoc = false;
2047
2048 ifmgd->p2p_noa_index = -1;
2049 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2050 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2051
2052 /* on the next assoc, re-program HT/VHT parameters */
2053 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2054 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2055 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2056 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2057
2058 /* reset MU-MIMO ownership and group data */
2059 memset(sdata->vif.bss_conf.mu_group.membership, 0,
2060 sizeof(sdata->vif.bss_conf.mu_group.membership));
2061 memset(sdata->vif.bss_conf.mu_group.position, 0,
2062 sizeof(sdata->vif.bss_conf.mu_group.position));
2063 changed |= BSS_CHANGED_MU_GROUPS;
2064 sdata->vif.mu_mimo_owner = false;
2065
2066 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2067
2068 del_timer_sync(&local->dynamic_ps_timer);
2069 cancel_work_sync(&local->dynamic_ps_enable_work);
2070
2071 /* Disable ARP filtering */
2072 if (sdata->vif.bss_conf.arp_addr_cnt)
2073 changed |= BSS_CHANGED_ARP_FILTER;
2074
2075 sdata->vif.bss_conf.qos = false;
2076 changed |= BSS_CHANGED_QOS;
2077
2078 /* The BSSID (not really interesting) and HT changed */
2079 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2080 ieee80211_bss_info_change_notify(sdata, changed);
2081
2082 /* disassociated - set to defaults now */
2083 ieee80211_set_wmm_default(sdata, false, false);
2084
2085 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2086 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2087 del_timer_sync(&sdata->u.mgd.timer);
2088 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2089
2090 sdata->vif.bss_conf.dtim_period = 0;
2091 sdata->vif.bss_conf.beacon_rate = NULL;
2092
2093 ifmgd->have_beacon = false;
2094
2095 ifmgd->flags = 0;
2096 mutex_lock(&local->mtx);
2097 ieee80211_vif_release_channel(sdata);
2098
2099 sdata->vif.csa_active = false;
2100 ifmgd->csa_waiting_bcn = false;
2101 ifmgd->csa_ignored_same_chan = false;
2102 if (sdata->csa_block_tx) {
2103 ieee80211_wake_vif_queues(local, sdata,
2104 IEEE80211_QUEUE_STOP_REASON_CSA);
2105 sdata->csa_block_tx = false;
2106 }
2107 mutex_unlock(&local->mtx);
2108
2109 /* existing TX TSPEC sessions no longer exist */
2110 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2111 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2112
2113 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2114 }
2115
2116 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2117 struct ieee80211_hdr *hdr)
2118 {
2119 /*
2120 * We can postpone the mgd.timer whenever receiving unicast frames
2121 * from AP because we know that the connection is working both ways
2122 * at that time. But multicast frames (and hence also beacons) must
2123 * be ignored here, because we need to trigger the timer during
2124 * data idle periods for sending the periodic probe request to the
2125 * AP we're connected to.
2126 */
2127 if (is_multicast_ether_addr(hdr->addr1))
2128 return;
2129
2130 ieee80211_sta_reset_conn_monitor(sdata);
2131 }
2132
2133 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2134 {
2135 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2136 struct ieee80211_local *local = sdata->local;
2137
2138 mutex_lock(&local->mtx);
2139 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2140 goto out;
2141
2142 __ieee80211_stop_poll(sdata);
2143
2144 mutex_lock(&local->iflist_mtx);
2145 ieee80211_recalc_ps(local);
2146 mutex_unlock(&local->iflist_mtx);
2147
2148 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2149 goto out;
2150
2151 /*
2152 * We've received a probe response, but are not sure whether
2153 * we have or will be receiving any beacons or data, so let's
2154 * schedule the timers again, just in case.
2155 */
2156 ieee80211_sta_reset_beacon_monitor(sdata);
2157
2158 mod_timer(&ifmgd->conn_mon_timer,
2159 round_jiffies_up(jiffies +
2160 IEEE80211_CONNECTION_IDLE_TIME));
2161 out:
2162 mutex_unlock(&local->mtx);
2163 }
2164
2165 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2166 struct ieee80211_hdr *hdr,
2167 u16 tx_time)
2168 {
2169 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2170 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2171 int ac = ieee80211_ac_from_tid(tid);
2172 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2173 unsigned long now = jiffies;
2174
2175 if (likely(!tx_tspec->admitted_time))
2176 return;
2177
2178 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2179 tx_tspec->consumed_tx_time = 0;
2180 tx_tspec->time_slice_start = now;
2181
2182 if (tx_tspec->downgraded) {
2183 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2184 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2185 }
2186 }
2187
2188 if (tx_tspec->downgraded)
2189 return;
2190
2191 tx_tspec->consumed_tx_time += tx_time;
2192
2193 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2194 tx_tspec->downgraded = true;
2195 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2196 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2197 }
2198 }
2199
2200 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2201 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2202 {
2203 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2204
2205 if (!ieee80211_is_data(hdr->frame_control))
2206 return;
2207
2208 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2209 sdata->u.mgd.probe_send_count > 0) {
2210 if (ack)
2211 ieee80211_sta_reset_conn_monitor(sdata);
2212 else
2213 sdata->u.mgd.nullfunc_failed = true;
2214 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2215 return;
2216 }
2217
2218 if (ack)
2219 ieee80211_sta_reset_conn_monitor(sdata);
2220 }
2221
2222 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2223 {
2224 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2225 const u8 *ssid;
2226 u8 *dst = ifmgd->associated->bssid;
2227 u8 unicast_limit = max(1, max_probe_tries - 3);
2228 struct sta_info *sta;
2229
2230 /*
2231 * Try sending broadcast probe requests for the last three
2232 * probe requests after the first ones failed since some
2233 * buggy APs only support broadcast probe requests.
2234 */
2235 if (ifmgd->probe_send_count >= unicast_limit)
2236 dst = NULL;
2237
2238 /*
2239 * When the hardware reports an accurate Tx ACK status, it's
2240 * better to send a nullfunc frame instead of a probe request,
2241 * as it will kick us off the AP quickly if we aren't associated
2242 * anymore. The timeout will be reset if the frame is ACKed by
2243 * the AP.
2244 */
2245 ifmgd->probe_send_count++;
2246
2247 if (dst) {
2248 mutex_lock(&sdata->local->sta_mtx);
2249 sta = sta_info_get(sdata, dst);
2250 if (!WARN_ON(!sta))
2251 ieee80211_check_fast_rx(sta);
2252 mutex_unlock(&sdata->local->sta_mtx);
2253 }
2254
2255 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2256 ifmgd->nullfunc_failed = false;
2257 ieee80211_send_nullfunc(sdata->local, sdata, false);
2258 } else {
2259 int ssid_len;
2260
2261 rcu_read_lock();
2262 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2263 if (WARN_ON_ONCE(ssid == NULL))
2264 ssid_len = 0;
2265 else
2266 ssid_len = ssid[1];
2267
2268 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2269 ssid + 2, ssid_len, NULL,
2270 0, (u32) -1, true, 0,
2271 ifmgd->associated->channel, false);
2272 rcu_read_unlock();
2273 }
2274
2275 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2276 run_again(sdata, ifmgd->probe_timeout);
2277 }
2278
2279 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2280 bool beacon)
2281 {
2282 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2283 bool already = false;
2284
2285 if (!ieee80211_sdata_running(sdata))
2286 return;
2287
2288 sdata_lock(sdata);
2289
2290 if (!ifmgd->associated)
2291 goto out;
2292
2293 mutex_lock(&sdata->local->mtx);
2294
2295 if (sdata->local->tmp_channel || sdata->local->scanning) {
2296 mutex_unlock(&sdata->local->mtx);
2297 goto out;
2298 }
2299
2300 if (beacon) {
2301 mlme_dbg_ratelimited(sdata,
2302 "detected beacon loss from AP (missed %d beacons) - probing\n",
2303 beacon_loss_count);
2304
2305 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2306 }
2307
2308 /*
2309 * The driver/our work has already reported this event or the
2310 * connection monitoring has kicked in and we have already sent
2311 * a probe request. Or maybe the AP died and the driver keeps
2312 * reporting until we disassociate...
2313 *
2314 * In either case we have to ignore the current call to this
2315 * function (except for setting the correct probe reason bit)
2316 * because otherwise we would reset the timer every time and
2317 * never check whether we received a probe response!
2318 */
2319 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2320 already = true;
2321
2322 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2323
2324 mutex_unlock(&sdata->local->mtx);
2325
2326 if (already)
2327 goto out;
2328
2329 mutex_lock(&sdata->local->iflist_mtx);
2330 ieee80211_recalc_ps(sdata->local);
2331 mutex_unlock(&sdata->local->iflist_mtx);
2332
2333 ifmgd->probe_send_count = 0;
2334 ieee80211_mgd_probe_ap_send(sdata);
2335 out:
2336 sdata_unlock(sdata);
2337 }
2338
2339 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2340 struct ieee80211_vif *vif)
2341 {
2342 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2343 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2344 struct cfg80211_bss *cbss;
2345 struct sk_buff *skb;
2346 const u8 *ssid;
2347 int ssid_len;
2348
2349 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2350 return NULL;
2351
2352 sdata_assert_lock(sdata);
2353
2354 if (ifmgd->associated)
2355 cbss = ifmgd->associated;
2356 else if (ifmgd->auth_data)
2357 cbss = ifmgd->auth_data->bss;
2358 else if (ifmgd->assoc_data)
2359 cbss = ifmgd->assoc_data->bss;
2360 else
2361 return NULL;
2362
2363 rcu_read_lock();
2364 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2365 if (WARN_ON_ONCE(ssid == NULL))
2366 ssid_len = 0;
2367 else
2368 ssid_len = ssid[1];
2369
2370 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2371 (u32) -1, cbss->channel,
2372 ssid + 2, ssid_len,
2373 NULL, 0, true);
2374 rcu_read_unlock();
2375
2376 return skb;
2377 }
2378 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2379
2380 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2381 const u8 *buf, size_t len, bool tx,
2382 u16 reason)
2383 {
2384 struct ieee80211_event event = {
2385 .type = MLME_EVENT,
2386 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2387 .u.mlme.reason = reason,
2388 };
2389
2390 if (tx)
2391 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2392 else
2393 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2394
2395 drv_event_callback(sdata->local, sdata, &event);
2396 }
2397
2398 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2399 {
2400 struct ieee80211_local *local = sdata->local;
2401 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2402 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2403
2404 sdata_lock(sdata);
2405 if (!ifmgd->associated) {
2406 sdata_unlock(sdata);
2407 return;
2408 }
2409
2410 /* AP is probably out of range (or not reachable for another reason) so
2411 * remove the bss struct for that AP.
2412 */
2413 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2414
2415 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2416 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2417 true, frame_buf);
2418 mutex_lock(&local->mtx);
2419 sdata->vif.csa_active = false;
2420 ifmgd->csa_waiting_bcn = false;
2421 if (sdata->csa_block_tx) {
2422 ieee80211_wake_vif_queues(local, sdata,
2423 IEEE80211_QUEUE_STOP_REASON_CSA);
2424 sdata->csa_block_tx = false;
2425 }
2426 mutex_unlock(&local->mtx);
2427
2428 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2429 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2430
2431 sdata_unlock(sdata);
2432 }
2433
2434 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2435 {
2436 struct ieee80211_sub_if_data *sdata =
2437 container_of(work, struct ieee80211_sub_if_data,
2438 u.mgd.beacon_connection_loss_work);
2439 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2440
2441 if (ifmgd->associated)
2442 ifmgd->beacon_loss_count++;
2443
2444 if (ifmgd->connection_loss) {
2445 sdata_info(sdata, "Connection to AP %pM lost\n",
2446 ifmgd->bssid);
2447 __ieee80211_disconnect(sdata);
2448 } else {
2449 ieee80211_mgd_probe_ap(sdata, true);
2450 }
2451 }
2452
2453 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2454 {
2455 struct ieee80211_sub_if_data *sdata =
2456 container_of(work, struct ieee80211_sub_if_data,
2457 u.mgd.csa_connection_drop_work);
2458
2459 __ieee80211_disconnect(sdata);
2460 }
2461
2462 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2463 {
2464 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2465 struct ieee80211_hw *hw = &sdata->local->hw;
2466
2467 trace_api_beacon_loss(sdata);
2468
2469 sdata->u.mgd.connection_loss = false;
2470 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2471 }
2472 EXPORT_SYMBOL(ieee80211_beacon_loss);
2473
2474 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2475 {
2476 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2477 struct ieee80211_hw *hw = &sdata->local->hw;
2478
2479 trace_api_connection_loss(sdata);
2480
2481 sdata->u.mgd.connection_loss = true;
2482 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2483 }
2484 EXPORT_SYMBOL(ieee80211_connection_loss);
2485
2486
2487 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2488 bool assoc)
2489 {
2490 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2491
2492 sdata_assert_lock(sdata);
2493
2494 if (!assoc) {
2495 /*
2496 * we are not authenticated yet, the only timer that could be
2497 * running is the timeout for the authentication response which
2498 * which is not relevant anymore.
2499 */
2500 del_timer_sync(&sdata->u.mgd.timer);
2501 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2502
2503 eth_zero_addr(sdata->u.mgd.bssid);
2504 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2505 sdata->u.mgd.flags = 0;
2506 mutex_lock(&sdata->local->mtx);
2507 ieee80211_vif_release_channel(sdata);
2508 mutex_unlock(&sdata->local->mtx);
2509 }
2510
2511 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2512 kfree(auth_data);
2513 sdata->u.mgd.auth_data = NULL;
2514 }
2515
2516 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2517 bool assoc, bool abandon)
2518 {
2519 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2520
2521 sdata_assert_lock(sdata);
2522
2523 if (!assoc) {
2524 /*
2525 * we are not associated yet, the only timer that could be
2526 * running is the timeout for the association response which
2527 * which is not relevant anymore.
2528 */
2529 del_timer_sync(&sdata->u.mgd.timer);
2530 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2531
2532 eth_zero_addr(sdata->u.mgd.bssid);
2533 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2534 sdata->u.mgd.flags = 0;
2535 sdata->vif.mu_mimo_owner = false;
2536
2537 mutex_lock(&sdata->local->mtx);
2538 ieee80211_vif_release_channel(sdata);
2539 mutex_unlock(&sdata->local->mtx);
2540
2541 if (abandon)
2542 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2543 }
2544
2545 kfree(assoc_data);
2546 sdata->u.mgd.assoc_data = NULL;
2547 }
2548
2549 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2550 struct ieee80211_mgmt *mgmt, size_t len)
2551 {
2552 struct ieee80211_local *local = sdata->local;
2553 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2554 u8 *pos;
2555 struct ieee802_11_elems elems;
2556 u32 tx_flags = 0;
2557
2558 pos = mgmt->u.auth.variable;
2559 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2560 if (!elems.challenge)
2561 return;
2562 auth_data->expected_transaction = 4;
2563 drv_mgd_prepare_tx(sdata->local, sdata);
2564 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2565 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2566 IEEE80211_TX_INTFL_MLME_CONN_TX;
2567 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2568 elems.challenge - 2, elems.challenge_len + 2,
2569 auth_data->bss->bssid, auth_data->bss->bssid,
2570 auth_data->key, auth_data->key_len,
2571 auth_data->key_idx, tx_flags);
2572 }
2573
2574 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2575 struct ieee80211_mgmt *mgmt, size_t len)
2576 {
2577 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2578 u8 bssid[ETH_ALEN];
2579 u16 auth_alg, auth_transaction, status_code;
2580 struct sta_info *sta;
2581 struct ieee80211_event event = {
2582 .type = MLME_EVENT,
2583 .u.mlme.data = AUTH_EVENT,
2584 };
2585
2586 sdata_assert_lock(sdata);
2587
2588 if (len < 24 + 6)
2589 return;
2590
2591 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2592 return;
2593
2594 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2595
2596 if (!ether_addr_equal(bssid, mgmt->bssid))
2597 return;
2598
2599 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2600 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2601 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2602
2603 if (auth_alg != ifmgd->auth_data->algorithm ||
2604 auth_transaction != ifmgd->auth_data->expected_transaction) {
2605 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2606 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2607 auth_transaction,
2608 ifmgd->auth_data->expected_transaction);
2609 return;
2610 }
2611
2612 if (status_code != WLAN_STATUS_SUCCESS) {
2613 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2614 mgmt->sa, status_code);
2615 ieee80211_destroy_auth_data(sdata, false);
2616 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2617 event.u.mlme.status = MLME_DENIED;
2618 event.u.mlme.reason = status_code;
2619 drv_event_callback(sdata->local, sdata, &event);
2620 return;
2621 }
2622
2623 switch (ifmgd->auth_data->algorithm) {
2624 case WLAN_AUTH_OPEN:
2625 case WLAN_AUTH_LEAP:
2626 case WLAN_AUTH_FT:
2627 case WLAN_AUTH_SAE:
2628 case WLAN_AUTH_FILS_SK:
2629 case WLAN_AUTH_FILS_SK_PFS:
2630 case WLAN_AUTH_FILS_PK:
2631 break;
2632 case WLAN_AUTH_SHARED_KEY:
2633 if (ifmgd->auth_data->expected_transaction != 4) {
2634 ieee80211_auth_challenge(sdata, mgmt, len);
2635 /* need another frame */
2636 return;
2637 }
2638 break;
2639 default:
2640 WARN_ONCE(1, "invalid auth alg %d",
2641 ifmgd->auth_data->algorithm);
2642 return;
2643 }
2644
2645 event.u.mlme.status = MLME_SUCCESS;
2646 drv_event_callback(sdata->local, sdata, &event);
2647 sdata_info(sdata, "authenticated\n");
2648 ifmgd->auth_data->done = true;
2649 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2650 ifmgd->auth_data->timeout_started = true;
2651 run_again(sdata, ifmgd->auth_data->timeout);
2652
2653 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2654 ifmgd->auth_data->expected_transaction != 2) {
2655 /*
2656 * Report auth frame to user space for processing since another
2657 * round of Authentication frames is still needed.
2658 */
2659 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2660 return;
2661 }
2662
2663 /* move station state to auth */
2664 mutex_lock(&sdata->local->sta_mtx);
2665 sta = sta_info_get(sdata, bssid);
2666 if (!sta) {
2667 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2668 goto out_err;
2669 }
2670 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2671 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2672 goto out_err;
2673 }
2674 mutex_unlock(&sdata->local->sta_mtx);
2675
2676 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2677 return;
2678 out_err:
2679 mutex_unlock(&sdata->local->sta_mtx);
2680 /* ignore frame -- wait for timeout */
2681 }
2682
2683 #define case_WLAN(type) \
2684 case WLAN_REASON_##type: return #type
2685
2686 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2687 {
2688 switch (reason_code) {
2689 case_WLAN(UNSPECIFIED);
2690 case_WLAN(PREV_AUTH_NOT_VALID);
2691 case_WLAN(DEAUTH_LEAVING);
2692 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2693 case_WLAN(DISASSOC_AP_BUSY);
2694 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2695 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2696 case_WLAN(DISASSOC_STA_HAS_LEFT);
2697 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2698 case_WLAN(DISASSOC_BAD_POWER);
2699 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2700 case_WLAN(INVALID_IE);
2701 case_WLAN(MIC_FAILURE);
2702 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2703 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2704 case_WLAN(IE_DIFFERENT);
2705 case_WLAN(INVALID_GROUP_CIPHER);
2706 case_WLAN(INVALID_PAIRWISE_CIPHER);
2707 case_WLAN(INVALID_AKMP);
2708 case_WLAN(UNSUPP_RSN_VERSION);
2709 case_WLAN(INVALID_RSN_IE_CAP);
2710 case_WLAN(IEEE8021X_FAILED);
2711 case_WLAN(CIPHER_SUITE_REJECTED);
2712 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2713 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2714 case_WLAN(DISASSOC_LOW_ACK);
2715 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2716 case_WLAN(QSTA_LEAVE_QBSS);
2717 case_WLAN(QSTA_NOT_USE);
2718 case_WLAN(QSTA_REQUIRE_SETUP);
2719 case_WLAN(QSTA_TIMEOUT);
2720 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2721 case_WLAN(MESH_PEER_CANCELED);
2722 case_WLAN(MESH_MAX_PEERS);
2723 case_WLAN(MESH_CONFIG);
2724 case_WLAN(MESH_CLOSE);
2725 case_WLAN(MESH_MAX_RETRIES);
2726 case_WLAN(MESH_CONFIRM_TIMEOUT);
2727 case_WLAN(MESH_INVALID_GTK);
2728 case_WLAN(MESH_INCONSISTENT_PARAM);
2729 case_WLAN(MESH_INVALID_SECURITY);
2730 case_WLAN(MESH_PATH_ERROR);
2731 case_WLAN(MESH_PATH_NOFORWARD);
2732 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2733 case_WLAN(MAC_EXISTS_IN_MBSS);
2734 case_WLAN(MESH_CHAN_REGULATORY);
2735 case_WLAN(MESH_CHAN);
2736 default: return "<unknown>";
2737 }
2738 }
2739
2740 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2741 struct ieee80211_mgmt *mgmt, size_t len)
2742 {
2743 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2744 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2745
2746 sdata_assert_lock(sdata);
2747
2748 if (len < 24 + 2)
2749 return;
2750
2751 if (ifmgd->associated &&
2752 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2753 const u8 *bssid = ifmgd->associated->bssid;
2754
2755 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2756 bssid, reason_code,
2757 ieee80211_get_reason_code_string(reason_code));
2758
2759 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2760
2761 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2762 reason_code);
2763 return;
2764 }
2765
2766 if (ifmgd->assoc_data &&
2767 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2768 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2769
2770 sdata_info(sdata,
2771 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2772 bssid, reason_code,
2773 ieee80211_get_reason_code_string(reason_code));
2774
2775 ieee80211_destroy_assoc_data(sdata, false, true);
2776
2777 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2778 return;
2779 }
2780 }
2781
2782
2783 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2784 struct ieee80211_mgmt *mgmt, size_t len)
2785 {
2786 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2787 u16 reason_code;
2788
2789 sdata_assert_lock(sdata);
2790
2791 if (len < 24 + 2)
2792 return;
2793
2794 if (!ifmgd->associated ||
2795 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2796 return;
2797
2798 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2799
2800 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2801 mgmt->sa, reason_code);
2802
2803 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2804
2805 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2806 }
2807
2808 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2809 u8 *supp_rates, unsigned int supp_rates_len,
2810 u32 *rates, u32 *basic_rates,
2811 bool *have_higher_than_11mbit,
2812 int *min_rate, int *min_rate_index,
2813 int shift, u32 rate_flags)
2814 {
2815 int i, j;
2816
2817 for (i = 0; i < supp_rates_len; i++) {
2818 int rate = supp_rates[i] & 0x7f;
2819 bool is_basic = !!(supp_rates[i] & 0x80);
2820
2821 if ((rate * 5 * (1 << shift)) > 110)
2822 *have_higher_than_11mbit = true;
2823
2824 /*
2825 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2826 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2827 *
2828 * Note: Even through the membership selector and the basic
2829 * rate flag share the same bit, they are not exactly
2830 * the same.
2831 */
2832 if (!!(supp_rates[i] & 0x80) &&
2833 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2834 continue;
2835
2836 for (j = 0; j < sband->n_bitrates; j++) {
2837 struct ieee80211_rate *br;
2838 int brate;
2839
2840 br = &sband->bitrates[j];
2841 if ((rate_flags & br->flags) != rate_flags)
2842 continue;
2843
2844 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2845 if (brate == rate) {
2846 *rates |= BIT(j);
2847 if (is_basic)
2848 *basic_rates |= BIT(j);
2849 if ((rate * 5) < *min_rate) {
2850 *min_rate = rate * 5;
2851 *min_rate_index = j;
2852 }
2853 break;
2854 }
2855 }
2856 }
2857 }
2858
2859 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2860 struct cfg80211_bss *cbss,
2861 struct ieee80211_mgmt *mgmt, size_t len)
2862 {
2863 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2864 struct ieee80211_local *local = sdata->local;
2865 struct ieee80211_supported_band *sband;
2866 struct sta_info *sta;
2867 u8 *pos;
2868 u16 capab_info, aid;
2869 struct ieee802_11_elems elems;
2870 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2871 const struct cfg80211_bss_ies *bss_ies = NULL;
2872 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2873 u32 changed = 0;
2874 int err;
2875 bool ret;
2876
2877 /* AssocResp and ReassocResp have identical structure */
2878
2879 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2880 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2881
2882 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2883 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2884 aid);
2885 aid &= ~(BIT(15) | BIT(14));
2886
2887 ifmgd->broken_ap = false;
2888
2889 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2890 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2891 aid);
2892 aid = 0;
2893 ifmgd->broken_ap = true;
2894 }
2895
2896 pos = mgmt->u.assoc_resp.variable;
2897 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2898
2899 if (!elems.supp_rates) {
2900 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2901 return false;
2902 }
2903
2904 ifmgd->aid = aid;
2905 ifmgd->tdls_chan_switch_prohibited =
2906 elems.ext_capab && elems.ext_capab_len >= 5 &&
2907 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2908
2909 /*
2910 * Some APs are erroneously not including some information in their
2911 * (re)association response frames. Try to recover by using the data
2912 * from the beacon or probe response. This seems to afflict mobile
2913 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2914 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2915 */
2916 if ((assoc_data->wmm && !elems.wmm_param) ||
2917 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2918 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2919 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2920 (!elems.vht_cap_elem || !elems.vht_operation))) {
2921 const struct cfg80211_bss_ies *ies;
2922 struct ieee802_11_elems bss_elems;
2923
2924 rcu_read_lock();
2925 ies = rcu_dereference(cbss->ies);
2926 if (ies)
2927 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2928 GFP_ATOMIC);
2929 rcu_read_unlock();
2930 if (!bss_ies)
2931 return false;
2932
2933 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2934 false, &bss_elems);
2935 if (assoc_data->wmm &&
2936 !elems.wmm_param && bss_elems.wmm_param) {
2937 elems.wmm_param = bss_elems.wmm_param;
2938 sdata_info(sdata,
2939 "AP bug: WMM param missing from AssocResp\n");
2940 }
2941
2942 /*
2943 * Also check if we requested HT/VHT, otherwise the AP doesn't
2944 * have to include the IEs in the (re)association response.
2945 */
2946 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2947 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2948 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2949 sdata_info(sdata,
2950 "AP bug: HT capability missing from AssocResp\n");
2951 }
2952 if (!elems.ht_operation && bss_elems.ht_operation &&
2953 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2954 elems.ht_operation = bss_elems.ht_operation;
2955 sdata_info(sdata,
2956 "AP bug: HT operation missing from AssocResp\n");
2957 }
2958 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2959 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2960 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2961 sdata_info(sdata,
2962 "AP bug: VHT capa missing from AssocResp\n");
2963 }
2964 if (!elems.vht_operation && bss_elems.vht_operation &&
2965 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2966 elems.vht_operation = bss_elems.vht_operation;
2967 sdata_info(sdata,
2968 "AP bug: VHT operation missing from AssocResp\n");
2969 }
2970 }
2971
2972 /*
2973 * We previously checked these in the beacon/probe response, so
2974 * they should be present here. This is just a safety net.
2975 */
2976 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2977 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2978 sdata_info(sdata,
2979 "HT AP is missing WMM params or HT capability/operation\n");
2980 ret = false;
2981 goto out;
2982 }
2983
2984 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2985 (!elems.vht_cap_elem || !elems.vht_operation)) {
2986 sdata_info(sdata,
2987 "VHT AP is missing VHT capability/operation\n");
2988 ret = false;
2989 goto out;
2990 }
2991
2992 mutex_lock(&sdata->local->sta_mtx);
2993 /*
2994 * station info was already allocated and inserted before
2995 * the association and should be available to us
2996 */
2997 sta = sta_info_get(sdata, cbss->bssid);
2998 if (WARN_ON(!sta)) {
2999 mutex_unlock(&sdata->local->sta_mtx);
3000 ret = false;
3001 goto out;
3002 }
3003
3004 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
3005
3006 /* Set up internal HT/VHT capabilities */
3007 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3008 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3009 elems.ht_cap_elem, sta);
3010
3011 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3012 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3013 elems.vht_cap_elem, sta);
3014
3015 /*
3016 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3017 * in their association response, so ignore that data for our own
3018 * configuration. If it changed since the last beacon, we'll get the
3019 * next beacon and update then.
3020 */
3021
3022 /*
3023 * If an operating mode notification IE is present, override the
3024 * NSS calculation (that would be done in rate_control_rate_init())
3025 * and use the # of streams from that element.
3026 */
3027 if (elems.opmode_notif &&
3028 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3029 u8 nss;
3030
3031 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3032 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3033 nss += 1;
3034 sta->sta.rx_nss = nss;
3035 }
3036
3037 rate_control_rate_init(sta);
3038
3039 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3040 set_sta_flag(sta, WLAN_STA_MFP);
3041 sta->sta.mfp = true;
3042 } else {
3043 sta->sta.mfp = false;
3044 }
3045
3046 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3047
3048 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3049 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3050 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3051 if (err) {
3052 sdata_info(sdata,
3053 "failed to move station %pM to desired state\n",
3054 sta->sta.addr);
3055 WARN_ON(__sta_info_destroy(sta));
3056 mutex_unlock(&sdata->local->sta_mtx);
3057 ret = false;
3058 goto out;
3059 }
3060
3061 mutex_unlock(&sdata->local->sta_mtx);
3062
3063 /*
3064 * Always handle WMM once after association regardless
3065 * of the first value the AP uses. Setting -1 here has
3066 * that effect because the AP values is an unsigned
3067 * 4-bit value.
3068 */
3069 ifmgd->wmm_last_param_set = -1;
3070
3071 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3072 ieee80211_set_wmm_default(sdata, false, false);
3073 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3074 elems.wmm_param_len)) {
3075 /* still enable QoS since we might have HT/VHT */
3076 ieee80211_set_wmm_default(sdata, false, true);
3077 /* set the disable-WMM flag in this case to disable
3078 * tracking WMM parameter changes in the beacon if
3079 * the parameters weren't actually valid. Doing so
3080 * avoids changing parameters very strangely when
3081 * the AP is going back and forth between valid and
3082 * invalid parameters.
3083 */
3084 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3085 }
3086 changed |= BSS_CHANGED_QOS;
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_req(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 (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3434 mlme_dbg_ratelimited(sdata,
3435 "cancelling AP probe due to a received beacon\n");
3436 ieee80211_reset_ap_probe(sdata);
3437 }
3438
3439 /*
3440 * Push the beacon loss detection into the future since
3441 * we are processing a beacon from the AP just now.
3442 */
3443 ieee80211_sta_reset_beacon_monitor(sdata);
3444
3445 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3446 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3447 len - baselen, false, &elems,
3448 care_about_ies, ncrc);
3449
3450 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3451 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3452 if (local->hw.conf.dynamic_ps_timeout > 0) {
3453 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3454 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3455 ieee80211_hw_config(local,
3456 IEEE80211_CONF_CHANGE_PS);
3457 }
3458 ieee80211_send_nullfunc(local, sdata, false);
3459 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3460 local->pspolling = true;
3461
3462 /*
3463 * Here is assumed that the driver will be
3464 * able to send ps-poll frame and receive a
3465 * response even though power save mode is
3466 * enabled, but some drivers might require
3467 * to disable power save here. This needs
3468 * to be investigated.
3469 */
3470 ieee80211_send_pspoll(local, sdata);
3471 }
3472 }
3473
3474 if (sdata->vif.p2p ||
3475 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3476 struct ieee80211_p2p_noa_attr noa = {};
3477 int ret;
3478
3479 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3480 len - baselen,
3481 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3482 (u8 *) &noa, sizeof(noa));
3483 if (ret >= 2) {
3484 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3485 /* valid noa_attr and index changed */
3486 sdata->u.mgd.p2p_noa_index = noa.index;
3487 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3488 changed |= BSS_CHANGED_P2P_PS;
3489 /*
3490 * make sure we update all information, the CRC
3491 * mechanism doesn't look at P2P attributes.
3492 */
3493 ifmgd->beacon_crc_valid = false;
3494 }
3495 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3496 /* noa_attr not found and we had valid noa_attr before */
3497 sdata->u.mgd.p2p_noa_index = -1;
3498 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3499 changed |= BSS_CHANGED_P2P_PS;
3500 ifmgd->beacon_crc_valid = false;
3501 }
3502 }
3503
3504 if (ifmgd->csa_waiting_bcn)
3505 ieee80211_chswitch_post_beacon(sdata);
3506
3507 /*
3508 * Update beacon timing and dtim count on every beacon appearance. This
3509 * will allow the driver to use the most updated values. Do it before
3510 * comparing this one with last received beacon.
3511 * IMPORTANT: These parameters would possibly be out of sync by the time
3512 * the driver will use them. The synchronized view is currently
3513 * guaranteed only in certain callbacks.
3514 */
3515 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3516 sdata->vif.bss_conf.sync_tsf =
3517 le64_to_cpu(mgmt->u.beacon.timestamp);
3518 sdata->vif.bss_conf.sync_device_ts =
3519 rx_status->device_timestamp;
3520 if (elems.tim)
3521 sdata->vif.bss_conf.sync_dtim_count =
3522 elems.tim->dtim_count;
3523 else
3524 sdata->vif.bss_conf.sync_dtim_count = 0;
3525 }
3526
3527 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3528 return;
3529 ifmgd->beacon_crc = ncrc;
3530 ifmgd->beacon_crc_valid = true;
3531
3532 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3533
3534 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3535 rx_status->device_timestamp,
3536 &elems, true);
3537
3538 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3539 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3540 elems.wmm_param_len))
3541 changed |= BSS_CHANGED_QOS;
3542
3543 /*
3544 * If we haven't had a beacon before, tell the driver about the
3545 * DTIM period (and beacon timing if desired) now.
3546 */
3547 if (!ifmgd->have_beacon) {
3548 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3549 if (elems.tim)
3550 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3551 else
3552 bss_conf->dtim_period = 1;
3553
3554 changed |= BSS_CHANGED_BEACON_INFO;
3555 ifmgd->have_beacon = true;
3556
3557 mutex_lock(&local->iflist_mtx);
3558 ieee80211_recalc_ps(local);
3559 mutex_unlock(&local->iflist_mtx);
3560
3561 ieee80211_recalc_ps_vif(sdata);
3562 }
3563
3564 if (elems.erp_info) {
3565 erp_valid = true;
3566 erp_value = elems.erp_info[0];
3567 } else {
3568 erp_valid = false;
3569 }
3570 changed |= ieee80211_handle_bss_capability(sdata,
3571 le16_to_cpu(mgmt->u.beacon.capab_info),
3572 erp_valid, erp_value);
3573
3574 mutex_lock(&local->sta_mtx);
3575 sta = sta_info_get(sdata, bssid);
3576
3577 if (ieee80211_config_bw(sdata, sta,
3578 elems.ht_cap_elem, elems.ht_operation,
3579 elems.vht_operation, bssid, &changed)) {
3580 mutex_unlock(&local->sta_mtx);
3581 sdata_info(sdata,
3582 "failed to follow AP %pM bandwidth change, disconnect\n",
3583 bssid);
3584 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3585 WLAN_REASON_DEAUTH_LEAVING,
3586 true, deauth_buf);
3587 ieee80211_report_disconnect(sdata, deauth_buf,
3588 sizeof(deauth_buf), true,
3589 WLAN_REASON_DEAUTH_LEAVING);
3590 return;
3591 }
3592
3593 if (sta && elems.opmode_notif)
3594 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3595 rx_status->band);
3596 mutex_unlock(&local->sta_mtx);
3597
3598 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3599 elems.country_elem,
3600 elems.country_elem_len,
3601 elems.pwr_constr_elem,
3602 elems.cisco_dtpc_elem);
3603
3604 ieee80211_bss_info_change_notify(sdata, changed);
3605 }
3606
3607 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3608 struct sk_buff *skb)
3609 {
3610 struct ieee80211_rx_status *rx_status;
3611 struct ieee80211_mgmt *mgmt;
3612 u16 fc;
3613 struct ieee802_11_elems elems;
3614 int ies_len;
3615
3616 rx_status = (struct ieee80211_rx_status *) skb->cb;
3617 mgmt = (struct ieee80211_mgmt *) skb->data;
3618 fc = le16_to_cpu(mgmt->frame_control);
3619
3620 sdata_lock(sdata);
3621
3622 switch (fc & IEEE80211_FCTL_STYPE) {
3623 case IEEE80211_STYPE_BEACON:
3624 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3625 break;
3626 case IEEE80211_STYPE_PROBE_RESP:
3627 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3628 break;
3629 case IEEE80211_STYPE_AUTH:
3630 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3631 break;
3632 case IEEE80211_STYPE_DEAUTH:
3633 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3634 break;
3635 case IEEE80211_STYPE_DISASSOC:
3636 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3637 break;
3638 case IEEE80211_STYPE_ASSOC_RESP:
3639 case IEEE80211_STYPE_REASSOC_RESP:
3640 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3641 break;
3642 case IEEE80211_STYPE_ACTION:
3643 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3644 ies_len = skb->len -
3645 offsetof(struct ieee80211_mgmt,
3646 u.action.u.chan_switch.variable);
3647
3648 if (ies_len < 0)
3649 break;
3650
3651 ieee802_11_parse_elems(
3652 mgmt->u.action.u.chan_switch.variable,
3653 ies_len, true, &elems);
3654
3655 if (elems.parse_error)
3656 break;
3657
3658 ieee80211_sta_process_chanswitch(sdata,
3659 rx_status->mactime,
3660 rx_status->device_timestamp,
3661 &elems, false);
3662 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3663 ies_len = skb->len -
3664 offsetof(struct ieee80211_mgmt,
3665 u.action.u.ext_chan_switch.variable);
3666
3667 if (ies_len < 0)
3668 break;
3669
3670 ieee802_11_parse_elems(
3671 mgmt->u.action.u.ext_chan_switch.variable,
3672 ies_len, true, &elems);
3673
3674 if (elems.parse_error)
3675 break;
3676
3677 /* for the handling code pretend this was also an IE */
3678 elems.ext_chansw_ie =
3679 &mgmt->u.action.u.ext_chan_switch.data;
3680
3681 ieee80211_sta_process_chanswitch(sdata,
3682 rx_status->mactime,
3683 rx_status->device_timestamp,
3684 &elems, false);
3685 }
3686 break;
3687 }
3688 sdata_unlock(sdata);
3689 }
3690
3691 static void ieee80211_sta_timer(unsigned long data)
3692 {
3693 struct ieee80211_sub_if_data *sdata =
3694 (struct ieee80211_sub_if_data *) data;
3695
3696 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3697 }
3698
3699 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3700 u8 *bssid, u8 reason, bool tx)
3701 {
3702 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3703
3704 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3705 tx, frame_buf);
3706
3707 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3708 reason);
3709 }
3710
3711 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3712 {
3713 struct ieee80211_local *local = sdata->local;
3714 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3715 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3716 u32 tx_flags = 0;
3717 u16 trans = 1;
3718 u16 status = 0;
3719
3720 sdata_assert_lock(sdata);
3721
3722 if (WARN_ON_ONCE(!auth_data))
3723 return -EINVAL;
3724
3725 auth_data->tries++;
3726
3727 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3728 sdata_info(sdata, "authentication with %pM timed out\n",
3729 auth_data->bss->bssid);
3730
3731 /*
3732 * Most likely AP is not in the range so remove the
3733 * bss struct for that AP.
3734 */
3735 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3736
3737 return -ETIMEDOUT;
3738 }
3739
3740 drv_mgd_prepare_tx(local, sdata);
3741
3742 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3743 auth_data->bss->bssid, auth_data->tries,
3744 IEEE80211_AUTH_MAX_TRIES);
3745
3746 auth_data->expected_transaction = 2;
3747
3748 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3749 trans = auth_data->sae_trans;
3750 status = auth_data->sae_status;
3751 auth_data->expected_transaction = trans;
3752 }
3753
3754 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3755 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3756 IEEE80211_TX_INTFL_MLME_CONN_TX;
3757
3758 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3759 auth_data->data, auth_data->data_len,
3760 auth_data->bss->bssid,
3761 auth_data->bss->bssid, NULL, 0, 0,
3762 tx_flags);
3763
3764 if (tx_flags == 0) {
3765 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3766 auth_data->timeout_started = true;
3767 run_again(sdata, auth_data->timeout);
3768 } else {
3769 auth_data->timeout =
3770 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3771 auth_data->timeout_started = true;
3772 run_again(sdata, auth_data->timeout);
3773 }
3774
3775 return 0;
3776 }
3777
3778 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3779 {
3780 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3781 struct ieee80211_local *local = sdata->local;
3782
3783 sdata_assert_lock(sdata);
3784
3785 assoc_data->tries++;
3786 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3787 sdata_info(sdata, "association with %pM timed out\n",
3788 assoc_data->bss->bssid);
3789
3790 /*
3791 * Most likely AP is not in the range so remove the
3792 * bss struct for that AP.
3793 */
3794 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3795
3796 return -ETIMEDOUT;
3797 }
3798
3799 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3800 assoc_data->bss->bssid, assoc_data->tries,
3801 IEEE80211_ASSOC_MAX_TRIES);
3802 ieee80211_send_assoc(sdata);
3803
3804 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3805 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3806 assoc_data->timeout_started = true;
3807 run_again(sdata, assoc_data->timeout);
3808 } else {
3809 assoc_data->timeout =
3810 round_jiffies_up(jiffies +
3811 IEEE80211_ASSOC_TIMEOUT_LONG);
3812 assoc_data->timeout_started = true;
3813 run_again(sdata, assoc_data->timeout);
3814 }
3815
3816 return 0;
3817 }
3818
3819 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3820 __le16 fc, bool acked)
3821 {
3822 struct ieee80211_local *local = sdata->local;
3823
3824 sdata->u.mgd.status_fc = fc;
3825 sdata->u.mgd.status_acked = acked;
3826 sdata->u.mgd.status_received = true;
3827
3828 ieee80211_queue_work(&local->hw, &sdata->work);
3829 }
3830
3831 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3832 {
3833 struct ieee80211_local *local = sdata->local;
3834 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3835
3836 sdata_lock(sdata);
3837
3838 if (ifmgd->status_received) {
3839 __le16 fc = ifmgd->status_fc;
3840 bool status_acked = ifmgd->status_acked;
3841
3842 ifmgd->status_received = false;
3843 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3844 if (status_acked) {
3845 ifmgd->auth_data->timeout =
3846 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3847 run_again(sdata, ifmgd->auth_data->timeout);
3848 } else {
3849 ifmgd->auth_data->timeout = jiffies - 1;
3850 }
3851 ifmgd->auth_data->timeout_started = true;
3852 } else if (ifmgd->assoc_data &&
3853 (ieee80211_is_assoc_req(fc) ||
3854 ieee80211_is_reassoc_req(fc))) {
3855 if (status_acked) {
3856 ifmgd->assoc_data->timeout =
3857 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3858 run_again(sdata, ifmgd->assoc_data->timeout);
3859 } else {
3860 ifmgd->assoc_data->timeout = jiffies - 1;
3861 }
3862 ifmgd->assoc_data->timeout_started = true;
3863 }
3864 }
3865
3866 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3867 time_after(jiffies, ifmgd->auth_data->timeout)) {
3868 if (ifmgd->auth_data->done) {
3869 /*
3870 * ok ... we waited for assoc but userspace didn't,
3871 * so let's just kill the auth data
3872 */
3873 ieee80211_destroy_auth_data(sdata, false);
3874 } else if (ieee80211_auth(sdata)) {
3875 u8 bssid[ETH_ALEN];
3876 struct ieee80211_event event = {
3877 .type = MLME_EVENT,
3878 .u.mlme.data = AUTH_EVENT,
3879 .u.mlme.status = MLME_TIMEOUT,
3880 };
3881
3882 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3883
3884 ieee80211_destroy_auth_data(sdata, false);
3885
3886 cfg80211_auth_timeout(sdata->dev, bssid);
3887 drv_event_callback(sdata->local, sdata, &event);
3888 }
3889 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3890 run_again(sdata, ifmgd->auth_data->timeout);
3891
3892 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3893 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3894 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3895 ieee80211_do_assoc(sdata)) {
3896 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3897 struct ieee80211_event event = {
3898 .type = MLME_EVENT,
3899 .u.mlme.data = ASSOC_EVENT,
3900 .u.mlme.status = MLME_TIMEOUT,
3901 };
3902
3903 ieee80211_destroy_assoc_data(sdata, false, false);
3904 cfg80211_assoc_timeout(sdata->dev, bss);
3905 drv_event_callback(sdata->local, sdata, &event);
3906 }
3907 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3908 run_again(sdata, ifmgd->assoc_data->timeout);
3909
3910 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3911 ifmgd->associated) {
3912 u8 bssid[ETH_ALEN];
3913 int max_tries;
3914
3915 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3916
3917 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3918 max_tries = max_nullfunc_tries;
3919 else
3920 max_tries = max_probe_tries;
3921
3922 /* ACK received for nullfunc probing frame */
3923 if (!ifmgd->probe_send_count)
3924 ieee80211_reset_ap_probe(sdata);
3925 else if (ifmgd->nullfunc_failed) {
3926 if (ifmgd->probe_send_count < max_tries) {
3927 mlme_dbg(sdata,
3928 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3929 bssid, ifmgd->probe_send_count,
3930 max_tries);
3931 ieee80211_mgd_probe_ap_send(sdata);
3932 } else {
3933 mlme_dbg(sdata,
3934 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3935 bssid);
3936 ieee80211_sta_connection_lost(sdata, bssid,
3937 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3938 false);
3939 }
3940 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3941 run_again(sdata, ifmgd->probe_timeout);
3942 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3943 mlme_dbg(sdata,
3944 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3945 bssid, probe_wait_ms);
3946 ieee80211_sta_connection_lost(sdata, bssid,
3947 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3948 } else if (ifmgd->probe_send_count < max_tries) {
3949 mlme_dbg(sdata,
3950 "No probe response from AP %pM after %dms, try %d/%i\n",
3951 bssid, probe_wait_ms,
3952 ifmgd->probe_send_count, max_tries);
3953 ieee80211_mgd_probe_ap_send(sdata);
3954 } else {
3955 /*
3956 * We actually lost the connection ... or did we?
3957 * Let's make sure!
3958 */
3959 mlme_dbg(sdata,
3960 "No probe response from AP %pM after %dms, disconnecting.\n",
3961 bssid, probe_wait_ms);
3962
3963 ieee80211_sta_connection_lost(sdata, bssid,
3964 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3965 }
3966 }
3967
3968 sdata_unlock(sdata);
3969 }
3970
3971 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3972 {
3973 struct ieee80211_sub_if_data *sdata =
3974 (struct ieee80211_sub_if_data *) data;
3975 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3976
3977 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3978 return;
3979
3980 sdata->u.mgd.connection_loss = false;
3981 ieee80211_queue_work(&sdata->local->hw,
3982 &sdata->u.mgd.beacon_connection_loss_work);
3983 }
3984
3985 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3986 {
3987 struct ieee80211_sub_if_data *sdata =
3988 (struct ieee80211_sub_if_data *) data;
3989 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3990 struct ieee80211_local *local = sdata->local;
3991
3992 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3993 return;
3994
3995 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3996 }
3997
3998 static void ieee80211_sta_monitor_work(struct work_struct *work)
3999 {
4000 struct ieee80211_sub_if_data *sdata =
4001 container_of(work, struct ieee80211_sub_if_data,
4002 u.mgd.monitor_work);
4003
4004 ieee80211_mgd_probe_ap(sdata, false);
4005 }
4006
4007 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4008 {
4009 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4010 __ieee80211_stop_poll(sdata);
4011
4012 /* let's probe the connection once */
4013 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4014 ieee80211_queue_work(&sdata->local->hw,
4015 &sdata->u.mgd.monitor_work);
4016 }
4017 }
4018
4019 #ifdef CONFIG_PM
4020 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4021 {
4022 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4023 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4024
4025 sdata_lock(sdata);
4026
4027 if (ifmgd->auth_data || ifmgd->assoc_data) {
4028 const u8 *bssid = ifmgd->auth_data ?
4029 ifmgd->auth_data->bss->bssid :
4030 ifmgd->assoc_data->bss->bssid;
4031
4032 /*
4033 * If we are trying to authenticate / associate while suspending,
4034 * cfg80211 won't know and won't actually abort those attempts,
4035 * thus we need to do that ourselves.
4036 */
4037 ieee80211_send_deauth_disassoc(sdata, bssid,
4038 IEEE80211_STYPE_DEAUTH,
4039 WLAN_REASON_DEAUTH_LEAVING,
4040 false, frame_buf);
4041 if (ifmgd->assoc_data)
4042 ieee80211_destroy_assoc_data(sdata, false, true);
4043 if (ifmgd->auth_data)
4044 ieee80211_destroy_auth_data(sdata, false);
4045 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4046 IEEE80211_DEAUTH_FRAME_LEN);
4047 }
4048
4049 /* This is a bit of a hack - we should find a better and more generic
4050 * solution to this. Normally when suspending, cfg80211 will in fact
4051 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4052 * auth (not so important) or assoc (this is the problem) process.
4053 *
4054 * As a consequence, it can happen that we are in the process of both
4055 * associating and suspending, and receive an association response
4056 * after cfg80211 has checked if it needs to disconnect, but before
4057 * we actually set the flag to drop incoming frames. This will then
4058 * cause the workqueue flush to process the association response in
4059 * the suspend, resulting in a successful association just before it
4060 * tries to remove the interface from the driver, which now though
4061 * has a channel context assigned ... this results in issues.
4062 *
4063 * To work around this (for now) simply deauth here again if we're
4064 * now connected.
4065 */
4066 if (ifmgd->associated && !sdata->local->wowlan) {
4067 u8 bssid[ETH_ALEN];
4068 struct cfg80211_deauth_request req = {
4069 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4070 .bssid = bssid,
4071 };
4072
4073 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4074 ieee80211_mgd_deauth(sdata, &req);
4075 }
4076
4077 sdata_unlock(sdata);
4078 }
4079
4080 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4081 {
4082 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4083
4084 sdata_lock(sdata);
4085 if (!ifmgd->associated) {
4086 sdata_unlock(sdata);
4087 return;
4088 }
4089
4090 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4091 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4092 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4093 ieee80211_sta_connection_lost(sdata,
4094 ifmgd->associated->bssid,
4095 WLAN_REASON_UNSPECIFIED,
4096 true);
4097 sdata_unlock(sdata);
4098 return;
4099 }
4100 sdata_unlock(sdata);
4101 }
4102 #endif
4103
4104 /* interface setup */
4105 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4106 {
4107 struct ieee80211_if_managed *ifmgd;
4108
4109 ifmgd = &sdata->u.mgd;
4110 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4111 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4112 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4113 ieee80211_beacon_connection_loss_work);
4114 INIT_WORK(&ifmgd->csa_connection_drop_work,
4115 ieee80211_csa_connection_drop_work);
4116 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4117 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4118 ieee80211_tdls_peer_del_work);
4119 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4120 (unsigned long) sdata);
4121 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4122 (unsigned long) sdata);
4123 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4124 (unsigned long) sdata);
4125 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4126 (unsigned long) sdata);
4127 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4128 ieee80211_sta_handle_tspec_ac_params_wk);
4129
4130 ifmgd->flags = 0;
4131 ifmgd->powersave = sdata->wdev.ps;
4132 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4133 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4134 ifmgd->p2p_noa_index = -1;
4135
4136 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4137 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4138 else
4139 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4140
4141 /* Setup TDLS data */
4142 spin_lock_init(&ifmgd->teardown_lock);
4143 ifmgd->teardown_skb = NULL;
4144 ifmgd->orig_teardown_skb = NULL;
4145 }
4146
4147 /* scan finished notification */
4148 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4149 {
4150 struct ieee80211_sub_if_data *sdata;
4151
4152 /* Restart STA timers */
4153 rcu_read_lock();
4154 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4155 if (ieee80211_sdata_running(sdata))
4156 ieee80211_restart_sta_timer(sdata);
4157 }
4158 rcu_read_unlock();
4159 }
4160
4161 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4162 struct cfg80211_bss *cbss)
4163 {
4164 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4165 const u8 *ht_cap_ie, *vht_cap_ie;
4166 const struct ieee80211_ht_cap *ht_cap;
4167 const struct ieee80211_vht_cap *vht_cap;
4168 u8 chains = 1;
4169
4170 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4171 return chains;
4172
4173 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4174 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4175 ht_cap = (void *)(ht_cap_ie + 2);
4176 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4177 /*
4178 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4179 * "Tx Unequal Modulation Supported" fields.
4180 */
4181 }
4182
4183 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4184 return chains;
4185
4186 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4187 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4188 u8 nss;
4189 u16 tx_mcs_map;
4190
4191 vht_cap = (void *)(vht_cap_ie + 2);
4192 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4193 for (nss = 8; nss > 0; nss--) {
4194 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4195 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4196 break;
4197 }
4198 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4199 chains = max(chains, nss);
4200 }
4201
4202 return chains;
4203 }
4204
4205 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4206 struct cfg80211_bss *cbss)
4207 {
4208 struct ieee80211_local *local = sdata->local;
4209 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4210 const struct ieee80211_ht_cap *ht_cap = NULL;
4211 const struct ieee80211_ht_operation *ht_oper = NULL;
4212 const struct ieee80211_vht_operation *vht_oper = NULL;
4213 struct ieee80211_supported_band *sband;
4214 struct cfg80211_chan_def chandef;
4215 int ret;
4216 u32 i;
4217 bool have_80mhz;
4218
4219 sband = local->hw.wiphy->bands[cbss->channel->band];
4220
4221 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4222 IEEE80211_STA_DISABLE_80P80MHZ |
4223 IEEE80211_STA_DISABLE_160MHZ);
4224
4225 rcu_read_lock();
4226
4227 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4228 sband->ht_cap.ht_supported) {
4229 const u8 *ht_oper_ie, *ht_cap_ie;
4230
4231 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4232 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4233 ht_oper = (void *)(ht_oper_ie + 2);
4234
4235 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4236 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4237 ht_cap = (void *)(ht_cap_ie + 2);
4238
4239 if (!ht_cap) {
4240 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4241 ht_oper = NULL;
4242 }
4243 }
4244
4245 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4246 sband->vht_cap.vht_supported) {
4247 const u8 *vht_oper_ie, *vht_cap;
4248
4249 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4250 WLAN_EID_VHT_OPERATION);
4251 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4252 vht_oper = (void *)(vht_oper_ie + 2);
4253 if (vht_oper && !ht_oper) {
4254 vht_oper = NULL;
4255 sdata_info(sdata,
4256 "AP advertised VHT without HT, disabling both\n");
4257 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4258 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4259 }
4260
4261 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4262 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4263 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4264 vht_oper = NULL;
4265 }
4266 }
4267
4268 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4269 have_80mhz = false;
4270 for (i = 0; i < sband->n_channels; i++) {
4271 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4272 IEEE80211_CHAN_NO_80MHZ))
4273 continue;
4274
4275 have_80mhz = true;
4276 break;
4277 }
4278
4279 if (!have_80mhz)
4280 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4281
4282 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4283 cbss->channel,
4284 ht_cap, ht_oper, vht_oper,
4285 &chandef, false);
4286
4287 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4288 local->rx_chains);
4289
4290 rcu_read_unlock();
4291
4292 /* will change later if needed */
4293 sdata->smps_mode = IEEE80211_SMPS_OFF;
4294
4295 mutex_lock(&local->mtx);
4296 /*
4297 * If this fails (possibly due to channel context sharing
4298 * on incompatible channels, e.g. 80+80 and 160 sharing the
4299 * same control channel) try to use a smaller bandwidth.
4300 */
4301 ret = ieee80211_vif_use_channel(sdata, &chandef,
4302 IEEE80211_CHANCTX_SHARED);
4303
4304 /* don't downgrade for 5 and 10 MHz channels, though. */
4305 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4306 chandef.width == NL80211_CHAN_WIDTH_10)
4307 goto out;
4308
4309 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4310 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4311 ret = ieee80211_vif_use_channel(sdata, &chandef,
4312 IEEE80211_CHANCTX_SHARED);
4313 }
4314 out:
4315 mutex_unlock(&local->mtx);
4316 return ret;
4317 }
4318
4319 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4320 struct cfg80211_bss *cbss, bool assoc,
4321 bool override)
4322 {
4323 struct ieee80211_local *local = sdata->local;
4324 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4325 struct ieee80211_bss *bss = (void *)cbss->priv;
4326 struct sta_info *new_sta = NULL;
4327 struct ieee80211_supported_band *sband;
4328 bool have_sta = false;
4329 int err;
4330
4331 sband = local->hw.wiphy->bands[cbss->channel->band];
4332
4333 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4334 return -EINVAL;
4335
4336 if (assoc) {
4337 rcu_read_lock();
4338 have_sta = sta_info_get(sdata, cbss->bssid);
4339 rcu_read_unlock();
4340 }
4341
4342 if (!have_sta) {
4343 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4344 if (!new_sta)
4345 return -ENOMEM;
4346 }
4347
4348 if (new_sta || override) {
4349 err = ieee80211_prep_channel(sdata, cbss);
4350 if (err) {
4351 if (new_sta)
4352 sta_info_free(local, new_sta);
4353 return -EINVAL;
4354 }
4355 }
4356
4357 if (new_sta) {
4358 u32 rates = 0, basic_rates = 0;
4359 bool have_higher_than_11mbit;
4360 int min_rate = INT_MAX, min_rate_index = -1;
4361 struct ieee80211_chanctx_conf *chanctx_conf;
4362 const struct cfg80211_bss_ies *ies;
4363 int shift = ieee80211_vif_get_shift(&sdata->vif);
4364 u32 rate_flags;
4365
4366 rcu_read_lock();
4367 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4368 if (WARN_ON(!chanctx_conf)) {
4369 rcu_read_unlock();
4370 sta_info_free(local, new_sta);
4371 return -EINVAL;
4372 }
4373 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4374 rcu_read_unlock();
4375
4376 ieee80211_get_rates(sband, bss->supp_rates,
4377 bss->supp_rates_len,
4378 &rates, &basic_rates,
4379 &have_higher_than_11mbit,
4380 &min_rate, &min_rate_index,
4381 shift, rate_flags);
4382
4383 /*
4384 * This used to be a workaround for basic rates missing
4385 * in the association response frame. Now that we no
4386 * longer use the basic rates from there, it probably
4387 * doesn't happen any more, but keep the workaround so
4388 * in case some *other* APs are buggy in different ways
4389 * we can connect -- with a warning.
4390 */
4391 if (!basic_rates && min_rate_index >= 0) {
4392 sdata_info(sdata,
4393 "No basic rates, using min rate instead\n");
4394 basic_rates = BIT(min_rate_index);
4395 }
4396
4397 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4398 sdata->vif.bss_conf.basic_rates = basic_rates;
4399
4400 /* cf. IEEE 802.11 9.2.12 */
4401 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4402 have_higher_than_11mbit)
4403 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4404 else
4405 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4406
4407 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4408
4409 /* set timing information */
4410 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4411 rcu_read_lock();
4412 ies = rcu_dereference(cbss->beacon_ies);
4413 if (ies) {
4414 const u8 *tim_ie;
4415
4416 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4417 sdata->vif.bss_conf.sync_device_ts =
4418 bss->device_ts_beacon;
4419 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4420 ies->data, ies->len);
4421 if (tim_ie && tim_ie[1] >= 2)
4422 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4423 else
4424 sdata->vif.bss_conf.sync_dtim_count = 0;
4425 } else if (!ieee80211_hw_check(&sdata->local->hw,
4426 TIMING_BEACON_ONLY)) {
4427 ies = rcu_dereference(cbss->proberesp_ies);
4428 /* must be non-NULL since beacon IEs were NULL */
4429 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4430 sdata->vif.bss_conf.sync_device_ts =
4431 bss->device_ts_presp;
4432 sdata->vif.bss_conf.sync_dtim_count = 0;
4433 } else {
4434 sdata->vif.bss_conf.sync_tsf = 0;
4435 sdata->vif.bss_conf.sync_device_ts = 0;
4436 sdata->vif.bss_conf.sync_dtim_count = 0;
4437 }
4438 rcu_read_unlock();
4439
4440 /* tell driver about BSSID, basic rates and timing */
4441 ieee80211_bss_info_change_notify(sdata,
4442 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4443 BSS_CHANGED_BEACON_INT);
4444
4445 if (assoc)
4446 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4447
4448 err = sta_info_insert(new_sta);
4449 new_sta = NULL;
4450 if (err) {
4451 sdata_info(sdata,
4452 "failed to insert STA entry for the AP (error %d)\n",
4453 err);
4454 return err;
4455 }
4456 } else
4457 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4458
4459 /* Cancel scan to ensure that nothing interferes with connection */
4460 if (local->scanning)
4461 ieee80211_scan_cancel(local);
4462
4463 return 0;
4464 }
4465
4466 /* config hooks */
4467 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4468 struct cfg80211_auth_request *req)
4469 {
4470 struct ieee80211_local *local = sdata->local;
4471 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4472 struct ieee80211_mgd_auth_data *auth_data;
4473 u16 auth_alg;
4474 int err;
4475
4476 /* prepare auth data structure */
4477
4478 switch (req->auth_type) {
4479 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4480 auth_alg = WLAN_AUTH_OPEN;
4481 break;
4482 case NL80211_AUTHTYPE_SHARED_KEY:
4483 if (IS_ERR(local->wep_tx_tfm))
4484 return -EOPNOTSUPP;
4485 auth_alg = WLAN_AUTH_SHARED_KEY;
4486 break;
4487 case NL80211_AUTHTYPE_FT:
4488 auth_alg = WLAN_AUTH_FT;
4489 break;
4490 case NL80211_AUTHTYPE_NETWORK_EAP:
4491 auth_alg = WLAN_AUTH_LEAP;
4492 break;
4493 case NL80211_AUTHTYPE_SAE:
4494 auth_alg = WLAN_AUTH_SAE;
4495 break;
4496 case NL80211_AUTHTYPE_FILS_SK:
4497 auth_alg = WLAN_AUTH_FILS_SK;
4498 break;
4499 case NL80211_AUTHTYPE_FILS_SK_PFS:
4500 auth_alg = WLAN_AUTH_FILS_SK_PFS;
4501 break;
4502 case NL80211_AUTHTYPE_FILS_PK:
4503 auth_alg = WLAN_AUTH_FILS_PK;
4504 break;
4505 default:
4506 return -EOPNOTSUPP;
4507 }
4508
4509 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
4510 req->ie_len, GFP_KERNEL);
4511 if (!auth_data)
4512 return -ENOMEM;
4513
4514 auth_data->bss = req->bss;
4515
4516 if (req->auth_data_len >= 4) {
4517 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
4518 __le16 *pos = (__le16 *) req->auth_data;
4519
4520 auth_data->sae_trans = le16_to_cpu(pos[0]);
4521 auth_data->sae_status = le16_to_cpu(pos[1]);
4522 }
4523 memcpy(auth_data->data, req->auth_data + 4,
4524 req->auth_data_len - 4);
4525 auth_data->data_len += req->auth_data_len - 4;
4526 }
4527
4528 if (req->ie && req->ie_len) {
4529 memcpy(&auth_data->data[auth_data->data_len],
4530 req->ie, req->ie_len);
4531 auth_data->data_len += req->ie_len;
4532 }
4533
4534 if (req->key && req->key_len) {
4535 auth_data->key_len = req->key_len;
4536 auth_data->key_idx = req->key_idx;
4537 memcpy(auth_data->key, req->key, req->key_len);
4538 }
4539
4540 auth_data->algorithm = auth_alg;
4541
4542 /* try to authenticate/probe */
4543
4544 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4545 ifmgd->assoc_data) {
4546 err = -EBUSY;
4547 goto err_free;
4548 }
4549
4550 if (ifmgd->auth_data)
4551 ieee80211_destroy_auth_data(sdata, false);
4552
4553 /* prep auth_data so we don't go into idle on disassoc */
4554 ifmgd->auth_data = auth_data;
4555
4556 if (ifmgd->associated) {
4557 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4558
4559 sdata_info(sdata,
4560 "disconnect from AP %pM for new auth to %pM\n",
4561 ifmgd->associated->bssid, req->bss->bssid);
4562 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4563 WLAN_REASON_UNSPECIFIED,
4564 false, frame_buf);
4565
4566 ieee80211_report_disconnect(sdata, frame_buf,
4567 sizeof(frame_buf), true,
4568 WLAN_REASON_UNSPECIFIED);
4569 }
4570
4571 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4572
4573 err = ieee80211_prep_connection(sdata, req->bss, false, false);
4574 if (err)
4575 goto err_clear;
4576
4577 err = ieee80211_auth(sdata);
4578 if (err) {
4579 sta_info_destroy_addr(sdata, req->bss->bssid);
4580 goto err_clear;
4581 }
4582
4583 /* hold our own reference */
4584 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4585 return 0;
4586
4587 err_clear:
4588 eth_zero_addr(ifmgd->bssid);
4589 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4590 ifmgd->auth_data = NULL;
4591 mutex_lock(&sdata->local->mtx);
4592 ieee80211_vif_release_channel(sdata);
4593 mutex_unlock(&sdata->local->mtx);
4594 err_free:
4595 kfree(auth_data);
4596 return err;
4597 }
4598
4599 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4600 struct cfg80211_assoc_request *req)
4601 {
4602 struct ieee80211_local *local = sdata->local;
4603 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4604 struct ieee80211_bss *bss = (void *)req->bss->priv;
4605 struct ieee80211_mgd_assoc_data *assoc_data;
4606 const struct cfg80211_bss_ies *beacon_ies;
4607 struct ieee80211_supported_band *sband;
4608 const u8 *ssidie, *ht_ie, *vht_ie;
4609 int i, err;
4610 bool override = false;
4611
4612 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4613 if (!assoc_data)
4614 return -ENOMEM;
4615
4616 rcu_read_lock();
4617 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4618 if (!ssidie) {
4619 rcu_read_unlock();
4620 kfree(assoc_data);
4621 return -EINVAL;
4622 }
4623 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4624 assoc_data->ssid_len = ssidie[1];
4625 rcu_read_unlock();
4626
4627 if (ifmgd->associated) {
4628 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4629
4630 sdata_info(sdata,
4631 "disconnect from AP %pM for new assoc to %pM\n",
4632 ifmgd->associated->bssid, req->bss->bssid);
4633 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4634 WLAN_REASON_UNSPECIFIED,
4635 false, frame_buf);
4636
4637 ieee80211_report_disconnect(sdata, frame_buf,
4638 sizeof(frame_buf), true,
4639 WLAN_REASON_UNSPECIFIED);
4640 }
4641
4642 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4643 err = -EBUSY;
4644 goto err_free;
4645 }
4646
4647 if (ifmgd->assoc_data) {
4648 err = -EBUSY;
4649 goto err_free;
4650 }
4651
4652 if (ifmgd->auth_data) {
4653 bool match;
4654
4655 /* keep sta info, bssid if matching */
4656 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4657 ieee80211_destroy_auth_data(sdata, match);
4658 }
4659
4660 /* prepare assoc data */
4661
4662 ifmgd->beacon_crc_valid = false;
4663
4664 assoc_data->wmm = bss->wmm_used &&
4665 (local->hw.queues >= IEEE80211_NUM_ACS);
4666
4667 /*
4668 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4669 * We still associate in non-HT mode (11a/b/g) if any one of these
4670 * ciphers is configured as pairwise.
4671 * We can set this to true for non-11n hardware, that'll be checked
4672 * separately along with the peer capabilities.
4673 */
4674 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4675 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4676 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4677 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4678 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4679 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4680 netdev_info(sdata->dev,
4681 "disabling HT/VHT due to WEP/TKIP use\n");
4682 }
4683 }
4684
4685 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4686 sband = local->hw.wiphy->bands[req->bss->channel->band];
4687 if (!sband->ht_cap.ht_supported ||
4688 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4689 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4690 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4691 if (!bss->wmm_used &&
4692 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4693 netdev_info(sdata->dev,
4694 "disabling HT as WMM/QoS is not supported by the AP\n");
4695 }
4696
4697 /* disable VHT if we don't support it or the AP doesn't use WMM */
4698 if (!sband->vht_cap.vht_supported ||
4699 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4700 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4701 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4702 if (!bss->wmm_used &&
4703 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4704 netdev_info(sdata->dev,
4705 "disabling VHT as WMM/QoS is not supported by the AP\n");
4706 }
4707
4708 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4709 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4710 sizeof(ifmgd->ht_capa_mask));
4711
4712 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4713 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4714 sizeof(ifmgd->vht_capa_mask));
4715
4716 if (req->ie && req->ie_len) {
4717 memcpy(assoc_data->ie, req->ie, req->ie_len);
4718 assoc_data->ie_len = req->ie_len;
4719 }
4720
4721 if (req->fils_kek) {
4722 /* should already be checked in cfg80211 - so warn */
4723 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
4724 err = -EINVAL;
4725 goto err_free;
4726 }
4727 memcpy(assoc_data->fils_kek, req->fils_kek,
4728 req->fils_kek_len);
4729 assoc_data->fils_kek_len = req->fils_kek_len;
4730 }
4731
4732 if (req->fils_nonces)
4733 memcpy(assoc_data->fils_nonces, req->fils_nonces,
4734 2 * FILS_NONCE_LEN);
4735
4736 assoc_data->bss = req->bss;
4737
4738 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4739 if (ifmgd->powersave)
4740 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4741 else
4742 sdata->smps_mode = IEEE80211_SMPS_OFF;
4743 } else
4744 sdata->smps_mode = ifmgd->req_smps;
4745
4746 assoc_data->capability = req->bss->capability;
4747 assoc_data->supp_rates = bss->supp_rates;
4748 assoc_data->supp_rates_len = bss->supp_rates_len;
4749
4750 rcu_read_lock();
4751 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4752 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4753 assoc_data->ap_ht_param =
4754 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4755 else
4756 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4757 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4758 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4759 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4760 sizeof(struct ieee80211_vht_cap));
4761 else
4762 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4763 rcu_read_unlock();
4764
4765 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4766 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4767 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4768 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4769
4770 if (bss->wmm_used && bss->uapsd_supported &&
4771 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4772 assoc_data->uapsd = true;
4773 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4774 } else {
4775 assoc_data->uapsd = false;
4776 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4777 }
4778
4779 if (req->prev_bssid)
4780 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4781
4782 if (req->use_mfp) {
4783 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4784 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4785 } else {
4786 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4787 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4788 }
4789
4790 if (req->flags & ASSOC_REQ_USE_RRM)
4791 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4792 else
4793 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4794
4795 if (req->crypto.control_port)
4796 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4797 else
4798 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4799
4800 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4801 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4802 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4803 sdata->vif.type);
4804
4805 /* kick off associate process */
4806
4807 ifmgd->assoc_data = assoc_data;
4808 ifmgd->dtim_period = 0;
4809 ifmgd->have_beacon = false;
4810
4811 /* override HT/VHT configuration only if the AP and we support it */
4812 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4813 struct ieee80211_sta_ht_cap sta_ht_cap;
4814
4815 if (req->flags & ASSOC_REQ_DISABLE_HT)
4816 override = true;
4817
4818 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4819 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4820
4821 /* check for 40 MHz disable override */
4822 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4823 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4824 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4825 override = true;
4826
4827 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4828 req->flags & ASSOC_REQ_DISABLE_VHT)
4829 override = true;
4830 }
4831
4832 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4833 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4834 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4835 }
4836
4837 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4838 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4839
4840 err = ieee80211_prep_connection(sdata, req->bss, true, override);
4841 if (err)
4842 goto err_clear;
4843
4844 rcu_read_lock();
4845 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4846
4847 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4848 !beacon_ies) {
4849 /*
4850 * Wait up to one beacon interval ...
4851 * should this be more if we miss one?
4852 */
4853 sdata_info(sdata, "waiting for beacon from %pM\n",
4854 ifmgd->bssid);
4855 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4856 assoc_data->timeout_started = true;
4857 assoc_data->need_beacon = true;
4858 } else if (beacon_ies) {
4859 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4860 beacon_ies->data,
4861 beacon_ies->len);
4862 u8 dtim_count = 0;
4863
4864 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4865 const struct ieee80211_tim_ie *tim;
4866 tim = (void *)(tim_ie + 2);
4867 ifmgd->dtim_period = tim->dtim_period;
4868 dtim_count = tim->dtim_count;
4869 }
4870 ifmgd->have_beacon = true;
4871 assoc_data->timeout = jiffies;
4872 assoc_data->timeout_started = true;
4873
4874 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4875 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4876 sdata->vif.bss_conf.sync_device_ts =
4877 bss->device_ts_beacon;
4878 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4879 }
4880 } else {
4881 assoc_data->timeout = jiffies;
4882 assoc_data->timeout_started = true;
4883 }
4884 rcu_read_unlock();
4885
4886 run_again(sdata, assoc_data->timeout);
4887
4888 if (bss->corrupt_data) {
4889 char *corrupt_type = "data";
4890 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4891 if (bss->corrupt_data &
4892 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4893 corrupt_type = "beacon and probe response";
4894 else
4895 corrupt_type = "beacon";
4896 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4897 corrupt_type = "probe response";
4898 sdata_info(sdata, "associating with AP with corrupt %s\n",
4899 corrupt_type);
4900 }
4901
4902 return 0;
4903 err_clear:
4904 eth_zero_addr(ifmgd->bssid);
4905 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4906 ifmgd->assoc_data = NULL;
4907 err_free:
4908 kfree(assoc_data);
4909 return err;
4910 }
4911
4912 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4913 struct cfg80211_deauth_request *req)
4914 {
4915 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4916 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4917 bool tx = !req->local_state_change;
4918
4919 if (ifmgd->auth_data &&
4920 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4921 sdata_info(sdata,
4922 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4923 req->bssid, req->reason_code,
4924 ieee80211_get_reason_code_string(req->reason_code));
4925
4926 drv_mgd_prepare_tx(sdata->local, sdata);
4927 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4928 IEEE80211_STYPE_DEAUTH,
4929 req->reason_code, tx,
4930 frame_buf);
4931 ieee80211_destroy_auth_data(sdata, false);
4932 ieee80211_report_disconnect(sdata, frame_buf,
4933 sizeof(frame_buf), true,
4934 req->reason_code);
4935
4936 return 0;
4937 }
4938
4939 if (ifmgd->assoc_data &&
4940 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4941 sdata_info(sdata,
4942 "aborting association with %pM by local choice (Reason: %u=%s)\n",
4943 req->bssid, req->reason_code,
4944 ieee80211_get_reason_code_string(req->reason_code));
4945
4946 drv_mgd_prepare_tx(sdata->local, sdata);
4947 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4948 IEEE80211_STYPE_DEAUTH,
4949 req->reason_code, tx,
4950 frame_buf);
4951 ieee80211_destroy_assoc_data(sdata, false, true);
4952 ieee80211_report_disconnect(sdata, frame_buf,
4953 sizeof(frame_buf), true,
4954 req->reason_code);
4955 return 0;
4956 }
4957
4958 if (ifmgd->associated &&
4959 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4960 sdata_info(sdata,
4961 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4962 req->bssid, req->reason_code,
4963 ieee80211_get_reason_code_string(req->reason_code));
4964
4965 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4966 req->reason_code, tx, frame_buf);
4967 ieee80211_report_disconnect(sdata, frame_buf,
4968 sizeof(frame_buf), true,
4969 req->reason_code);
4970 return 0;
4971 }
4972
4973 return -ENOTCONN;
4974 }
4975
4976 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4977 struct cfg80211_disassoc_request *req)
4978 {
4979 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4980 u8 bssid[ETH_ALEN];
4981 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4982
4983 /*
4984 * cfg80211 should catch this ... but it's racy since
4985 * we can receive a disassoc frame, process it, hand it
4986 * to cfg80211 while that's in a locked section already
4987 * trying to tell us that the user wants to disconnect.
4988 */
4989 if (ifmgd->associated != req->bss)
4990 return -ENOLINK;
4991
4992 sdata_info(sdata,
4993 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4994 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4995
4996 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4997 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4998 req->reason_code, !req->local_state_change,
4999 frame_buf);
5000
5001 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5002 req->reason_code);
5003
5004 return 0;
5005 }
5006
5007 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5008 {
5009 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5010
5011 /*
5012 * Make sure some work items will not run after this,
5013 * they will not do anything but might not have been
5014 * cancelled when disconnecting.
5015 */
5016 cancel_work_sync(&ifmgd->monitor_work);
5017 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5018 cancel_work_sync(&ifmgd->request_smps_work);
5019 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5020 cancel_work_sync(&ifmgd->chswitch_work);
5021 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5022
5023 sdata_lock(sdata);
5024 if (ifmgd->assoc_data) {
5025 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5026 ieee80211_destroy_assoc_data(sdata, false, false);
5027 cfg80211_assoc_timeout(sdata->dev, bss);
5028 }
5029 if (ifmgd->auth_data)
5030 ieee80211_destroy_auth_data(sdata, false);
5031 spin_lock_bh(&ifmgd->teardown_lock);
5032 if (ifmgd->teardown_skb) {
5033 kfree_skb(ifmgd->teardown_skb);
5034 ifmgd->teardown_skb = NULL;
5035 ifmgd->orig_teardown_skb = NULL;
5036 }
5037 spin_unlock_bh(&ifmgd->teardown_lock);
5038 del_timer_sync(&ifmgd->timer);
5039 sdata_unlock(sdata);
5040 }
5041
5042 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5043 enum nl80211_cqm_rssi_threshold_event rssi_event,
5044 s32 rssi_level,
5045 gfp_t gfp)
5046 {
5047 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5048
5049 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5050
5051 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5052 }
5053 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5054
5055 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5056 {
5057 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5058
5059 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5060
5061 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5062 }
5063 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
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