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Linux 4.14.5
[linux/fpc-iii.git] / net / mac80211 / mlme.c
blob3b8e2709d8dea14ba4711de7d7d5c6ed5b48473a
1 /*
2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15
16 #include <linux/delay.h>
17 #include <linux/if_ether.h>
18 #include <linux/skbuff.h>
19 #include <linux/if_arp.h>
20 #include <linux/etherdevice.h>
21 #include <linux/moduleparam.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/crc32.h>
24 #include <linux/slab.h>
25 #include <linux/export.h>
26 #include <net/mac80211.h>
27 #include <asm/unaligned.h>
28
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
31 #include "rate.h"
32 #include "led.h"
33 #include "fils_aead.h"
34
35 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
36 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
37 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
38 #define IEEE80211_AUTH_MAX_TRIES 3
39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
41 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
42 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
43 #define IEEE80211_ASSOC_MAX_TRIES 3
44
45 static int max_nullfunc_tries = 2;
46 module_param(max_nullfunc_tries, int, 0644);
47 MODULE_PARM_DESC(max_nullfunc_tries,
48 "Maximum nullfunc tx tries before disconnecting (reason 4).");
49
50 static int max_probe_tries = 5;
51 module_param(max_probe_tries, int, 0644);
52 MODULE_PARM_DESC(max_probe_tries,
53 "Maximum probe tries before disconnecting (reason 4).");
54
55 /*
56 * Beacon loss timeout is calculated as N frames times the
57 * advertised beacon interval. This may need to be somewhat
58 * higher than what hardware might detect to account for
59 * delays in the host processing frames. But since we also
60 * probe on beacon miss before declaring the connection lost
61 * default to what we want.
62 */
63 static int beacon_loss_count = 7;
64 module_param(beacon_loss_count, int, 0644);
65 MODULE_PARM_DESC(beacon_loss_count,
66 "Number of beacon intervals before we decide beacon was lost.");
67
68 /*
69 * Time the connection can be idle before we probe
70 * it to see if we can still talk to the AP.
71 */
72 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
73 /*
74 * Time we wait for a probe response after sending
75 * a probe request because of beacon loss or for
76 * checking the connection still works.
77 */
78 static int probe_wait_ms = 500;
79 module_param(probe_wait_ms, int, 0644);
80 MODULE_PARM_DESC(probe_wait_ms,
81 "Maximum time(ms) to wait for probe response"
82 " before disconnecting (reason 4).");
83
84 /*
85 * How many Beacon frames need to have been used in average signal strength
86 * before starting to indicate signal change events.
87 */
88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
89
90 /*
91 * We can have multiple work items (and connection probing)
92 * scheduling this timer, but we need to take care to only
93 * reschedule it when it should fire _earlier_ than it was
94 * asked for before, or if it's not pending right now. This
95 * function ensures that. Note that it then is required to
96 * run this function for all timeouts after the first one
97 * has happened -- the work that runs from this timer will
98 * do that.
99 */
100 static void run_again(struct ieee80211_sub_if_data *sdata,
101 unsigned long timeout)
102 {
103 sdata_assert_lock(sdata);
104
105 if (!timer_pending(&sdata->u.mgd.timer) ||
106 time_before(timeout, sdata->u.mgd.timer.expires))
107 mod_timer(&sdata->u.mgd.timer, timeout);
108 }
109
110 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
111 {
112 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
113 return;
114
115 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
116 return;
117
118 mod_timer(&sdata->u.mgd.bcn_mon_timer,
119 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
120 }
121
122 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
123 {
124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
125
126 if (unlikely(!ifmgd->associated))
127 return;
128
129 if (ifmgd->probe_send_count)
130 ifmgd->probe_send_count = 0;
131
132 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
133 return;
134
135 mod_timer(&ifmgd->conn_mon_timer,
136 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
137 }
138
139 static int ecw2cw(int ecw)
140 {
141 return (1 << ecw) - 1;
142 }
143
144 static u32
145 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
146 struct ieee80211_supported_band *sband,
147 struct ieee80211_channel *channel,
148 const struct ieee80211_ht_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 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 rcu_read_unlock();
616 sband = local->hw.wiphy->bands[chan->band];
617 shift = ieee80211_vif_get_shift(&sdata->vif);
618
619 if (assoc_data->supp_rates_len) {
620 /*
621 * Get all rates supported by the device and the AP as
622 * some APs don't like getting a superset of their rates
623 * in the association request (e.g. D-Link DAP 1353 in
624 * b-only mode)...
625 */
626 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
627 assoc_data->supp_rates,
628 assoc_data->supp_rates_len,
629 &rates);
630 } else {
631 /*
632 * In case AP not provide any supported rates information
633 * before association, we send information element(s) with
634 * all rates that we support.
635 */
636 rates_len = 0;
637 for (i = 0; i < sband->n_bitrates; i++) {
638 rates |= BIT(i);
639 rates_len++;
640 }
641 }
642
643 skb = alloc_skb(local->hw.extra_tx_headroom +
644 sizeof(*mgmt) + /* bit too much but doesn't matter */
645 2 + assoc_data->ssid_len + /* SSID */
646 4 + rates_len + /* (extended) rates */
647 4 + /* power capability */
648 2 + 2 * sband->n_channels + /* supported channels */
649 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
650 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
651 assoc_data->ie_len + /* extra IEs */
652 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
653 9, /* WMM */
654 GFP_KERNEL);
655 if (!skb)
656 return;
657
658 skb_reserve(skb, local->hw.extra_tx_headroom);
659
660 capab = WLAN_CAPABILITY_ESS;
661
662 if (sband->band == NL80211_BAND_2GHZ) {
663 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
664 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
665 }
666
667 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
668 capab |= WLAN_CAPABILITY_PRIVACY;
669
670 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
671 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
672 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
673
674 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
675 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
676
677 mgmt = skb_put_zero(skb, 24);
678 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
679 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
680 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
681
682 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
683 skb_put(skb, 10);
684 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
685 IEEE80211_STYPE_REASSOC_REQ);
686 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
687 mgmt->u.reassoc_req.listen_interval =
688 cpu_to_le16(local->hw.conf.listen_interval);
689 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
690 ETH_ALEN);
691 } else {
692 skb_put(skb, 4);
693 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
694 IEEE80211_STYPE_ASSOC_REQ);
695 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
696 mgmt->u.assoc_req.listen_interval =
697 cpu_to_le16(local->hw.conf.listen_interval);
698 }
699
700 /* SSID */
701 pos = skb_put(skb, 2 + assoc_data->ssid_len);
702 *pos++ = WLAN_EID_SSID;
703 *pos++ = assoc_data->ssid_len;
704 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
705
706 /* add all rates which were marked to be used above */
707 supp_rates_len = rates_len;
708 if (supp_rates_len > 8)
709 supp_rates_len = 8;
710
711 pos = skb_put(skb, supp_rates_len + 2);
712 *pos++ = WLAN_EID_SUPP_RATES;
713 *pos++ = supp_rates_len;
714
715 count = 0;
716 for (i = 0; i < sband->n_bitrates; i++) {
717 if (BIT(i) & rates) {
718 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
719 5 * (1 << shift));
720 *pos++ = (u8) rate;
721 if (++count == 8)
722 break;
723 }
724 }
725
726 if (rates_len > count) {
727 pos = skb_put(skb, rates_len - count + 2);
728 *pos++ = WLAN_EID_EXT_SUPP_RATES;
729 *pos++ = rates_len - count;
730
731 for (i++; i < sband->n_bitrates; i++) {
732 if (BIT(i) & rates) {
733 int rate;
734 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
735 5 * (1 << shift));
736 *pos++ = (u8) rate;
737 }
738 }
739 }
740
741 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
742 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
743 pos = skb_put(skb, 4);
744 *pos++ = WLAN_EID_PWR_CAPABILITY;
745 *pos++ = 2;
746 *pos++ = 0; /* min tx power */
747 /* max tx power */
748 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
749 }
750
751 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
752 /* TODO: get this in reg domain format */
753 pos = skb_put(skb, 2 * sband->n_channels + 2);
754 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
755 *pos++ = 2 * sband->n_channels;
756 for (i = 0; i < sband->n_channels; i++) {
757 *pos++ = ieee80211_frequency_to_channel(
758 sband->channels[i].center_freq);
759 *pos++ = 1; /* one channel in the subband*/
760 }
761 }
762
763 /* if present, add any custom IEs that go before HT */
764 if (assoc_data->ie_len) {
765 static const u8 before_ht[] = {
766 WLAN_EID_SSID,
767 WLAN_EID_SUPP_RATES,
768 WLAN_EID_EXT_SUPP_RATES,
769 WLAN_EID_PWR_CAPABILITY,
770 WLAN_EID_SUPPORTED_CHANNELS,
771 WLAN_EID_RSN,
772 WLAN_EID_QOS_CAPA,
773 WLAN_EID_RRM_ENABLED_CAPABILITIES,
774 WLAN_EID_MOBILITY_DOMAIN,
775 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
776 WLAN_EID_RIC_DATA, /* reassoc only */
777 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
778 };
779 static const u8 after_ric[] = {
780 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
781 WLAN_EID_HT_CAPABILITY,
782 WLAN_EID_BSS_COEX_2040,
783 WLAN_EID_EXT_CAPABILITY,
784 WLAN_EID_QOS_TRAFFIC_CAPA,
785 WLAN_EID_TIM_BCAST_REQ,
786 WLAN_EID_INTERWORKING,
787 /* 60GHz doesn't happen right now */
788 WLAN_EID_VHT_CAPABILITY,
789 WLAN_EID_OPMODE_NOTIF,
790 };
791
792 noffset = ieee80211_ie_split_ric(assoc_data->ie,
793 assoc_data->ie_len,
794 before_ht,
795 ARRAY_SIZE(before_ht),
796 after_ric,
797 ARRAY_SIZE(after_ric),
798 offset);
799 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
800 offset = noffset;
801 }
802
803 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
804 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
805 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
806
807 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
808 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
809 sband, chan, sdata->smps_mode);
810
811 /* if present, add any custom IEs that go before VHT */
812 if (assoc_data->ie_len) {
813 static const u8 before_vht[] = {
814 WLAN_EID_SSID,
815 WLAN_EID_SUPP_RATES,
816 WLAN_EID_EXT_SUPP_RATES,
817 WLAN_EID_PWR_CAPABILITY,
818 WLAN_EID_SUPPORTED_CHANNELS,
819 WLAN_EID_RSN,
820 WLAN_EID_QOS_CAPA,
821 WLAN_EID_RRM_ENABLED_CAPABILITIES,
822 WLAN_EID_MOBILITY_DOMAIN,
823 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
824 WLAN_EID_HT_CAPABILITY,
825 WLAN_EID_BSS_COEX_2040,
826 WLAN_EID_EXT_CAPABILITY,
827 WLAN_EID_QOS_TRAFFIC_CAPA,
828 WLAN_EID_TIM_BCAST_REQ,
829 WLAN_EID_INTERWORKING,
830 };
831
832 /* RIC already taken above, so no need to handle here anymore */
833 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
834 before_vht, ARRAY_SIZE(before_vht),
835 offset);
836 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
837 offset = noffset;
838 }
839
840 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
841 ieee80211_add_vht_ie(sdata, skb, sband,
842 &assoc_data->ap_vht_cap);
843
844 /* if present, add any custom non-vendor IEs that go after HT */
845 if (assoc_data->ie_len) {
846 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
847 assoc_data->ie_len,
848 offset);
849 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
850 offset = noffset;
851 }
852
853 if (assoc_data->wmm) {
854 if (assoc_data->uapsd) {
855 qos_info = ifmgd->uapsd_queues;
856 qos_info |= (ifmgd->uapsd_max_sp_len <<
857 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
858 } else {
859 qos_info = 0;
860 }
861
862 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
863 }
864
865 /* add any remaining custom (i.e. vendor specific here) IEs */
866 if (assoc_data->ie_len) {
867 noffset = assoc_data->ie_len;
868 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
869 }
870
871 if (assoc_data->fils_kek_len &&
872 fils_encrypt_assoc_req(skb, assoc_data) < 0) {
873 dev_kfree_skb(skb);
874 return;
875 }
876
877 drv_mgd_prepare_tx(local, sdata);
878
879 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
880 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
881 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
882 IEEE80211_TX_INTFL_MLME_CONN_TX;
883 ieee80211_tx_skb(sdata, skb);
884 }
885
886 void ieee80211_send_pspoll(struct ieee80211_local *local,
887 struct ieee80211_sub_if_data *sdata)
888 {
889 struct ieee80211_pspoll *pspoll;
890 struct sk_buff *skb;
891
892 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
893 if (!skb)
894 return;
895
896 pspoll = (struct ieee80211_pspoll *) skb->data;
897 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
898
899 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
900 ieee80211_tx_skb(sdata, skb);
901 }
902
903 void ieee80211_send_nullfunc(struct ieee80211_local *local,
904 struct ieee80211_sub_if_data *sdata,
905 bool powersave)
906 {
907 struct sk_buff *skb;
908 struct ieee80211_hdr_3addr *nullfunc;
909 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
910
911 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
912 if (!skb)
913 return;
914
915 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
916 if (powersave)
917 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
918
919 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
920 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
921
922 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
923 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
924
925 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
926 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
927
928 ieee80211_tx_skb(sdata, skb);
929 }
930
931 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
932 struct ieee80211_sub_if_data *sdata)
933 {
934 struct sk_buff *skb;
935 struct ieee80211_hdr *nullfunc;
936 __le16 fc;
937
938 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
939 return;
940
941 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
942 if (!skb)
943 return;
944
945 skb_reserve(skb, local->hw.extra_tx_headroom);
946
947 nullfunc = skb_put_zero(skb, 30);
948 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
949 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
950 nullfunc->frame_control = fc;
951 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
952 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
953 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
954 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
955
956 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
957 ieee80211_tx_skb(sdata, skb);
958 }
959
960 /* spectrum management related things */
961 static void ieee80211_chswitch_work(struct work_struct *work)
962 {
963 struct ieee80211_sub_if_data *sdata =
964 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
965 struct ieee80211_local *local = sdata->local;
966 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
967 int ret;
968
969 if (!ieee80211_sdata_running(sdata))
970 return;
971
972 sdata_lock(sdata);
973 mutex_lock(&local->mtx);
974 mutex_lock(&local->chanctx_mtx);
975
976 if (!ifmgd->associated)
977 goto out;
978
979 if (!sdata->vif.csa_active)
980 goto out;
981
982 /*
983 * using reservation isn't immediate as it may be deferred until later
984 * with multi-vif. once reservation is complete it will re-schedule the
985 * work with no reserved_chanctx so verify chandef to check if it
986 * completed successfully
987 */
988
989 if (sdata->reserved_chanctx) {
990 /*
991 * with multi-vif csa driver may call ieee80211_csa_finish()
992 * many times while waiting for other interfaces to use their
993 * reservations
994 */
995 if (sdata->reserved_ready)
996 goto out;
997
998 ret = ieee80211_vif_use_reserved_context(sdata);
999 if (ret) {
1000 sdata_info(sdata,
1001 "failed to use reserved channel context, disconnecting (err=%d)\n",
1002 ret);
1003 ieee80211_queue_work(&sdata->local->hw,
1004 &ifmgd->csa_connection_drop_work);
1005 goto out;
1006 }
1007
1008 goto out;
1009 }
1010
1011 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1012 &sdata->csa_chandef)) {
1013 sdata_info(sdata,
1014 "failed to finalize channel switch, disconnecting\n");
1015 ieee80211_queue_work(&sdata->local->hw,
1016 &ifmgd->csa_connection_drop_work);
1017 goto out;
1018 }
1019
1020 /* XXX: shouldn't really modify cfg80211-owned data! */
1021 ifmgd->associated->channel = sdata->csa_chandef.chan;
1022
1023 ifmgd->csa_waiting_bcn = true;
1024
1025 ieee80211_sta_reset_beacon_monitor(sdata);
1026 ieee80211_sta_reset_conn_monitor(sdata);
1027
1028 out:
1029 mutex_unlock(&local->chanctx_mtx);
1030 mutex_unlock(&local->mtx);
1031 sdata_unlock(sdata);
1032 }
1033
1034 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1035 {
1036 struct ieee80211_local *local = sdata->local;
1037 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1038 int ret;
1039
1040 sdata_assert_lock(sdata);
1041
1042 WARN_ON(!sdata->vif.csa_active);
1043
1044 if (sdata->csa_block_tx) {
1045 ieee80211_wake_vif_queues(local, sdata,
1046 IEEE80211_QUEUE_STOP_REASON_CSA);
1047 sdata->csa_block_tx = false;
1048 }
1049
1050 sdata->vif.csa_active = false;
1051 ifmgd->csa_waiting_bcn = false;
1052
1053 ret = drv_post_channel_switch(sdata);
1054 if (ret) {
1055 sdata_info(sdata,
1056 "driver post channel switch failed, disconnecting\n");
1057 ieee80211_queue_work(&local->hw,
1058 &ifmgd->csa_connection_drop_work);
1059 return;
1060 }
1061
1062 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1063 }
1064
1065 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1066 {
1067 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1068 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1069
1070 trace_api_chswitch_done(sdata, success);
1071 if (!success) {
1072 sdata_info(sdata,
1073 "driver channel switch failed, disconnecting\n");
1074 ieee80211_queue_work(&sdata->local->hw,
1075 &ifmgd->csa_connection_drop_work);
1076 } else {
1077 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1078 }
1079 }
1080 EXPORT_SYMBOL(ieee80211_chswitch_done);
1081
1082 static void ieee80211_chswitch_timer(unsigned long data)
1083 {
1084 struct ieee80211_sub_if_data *sdata =
1085 (struct ieee80211_sub_if_data *) data;
1086
1087 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1088 }
1089
1090 static void
1091 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1092 u64 timestamp, u32 device_timestamp,
1093 struct ieee802_11_elems *elems,
1094 bool beacon)
1095 {
1096 struct ieee80211_local *local = sdata->local;
1097 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1098 struct cfg80211_bss *cbss = ifmgd->associated;
1099 struct ieee80211_chanctx_conf *conf;
1100 struct ieee80211_chanctx *chanctx;
1101 enum nl80211_band current_band;
1102 struct ieee80211_csa_ie csa_ie;
1103 struct ieee80211_channel_switch ch_switch;
1104 int res;
1105
1106 sdata_assert_lock(sdata);
1107
1108 if (!cbss)
1109 return;
1110
1111 if (local->scanning)
1112 return;
1113
1114 /* disregard subsequent announcements if we are already processing */
1115 if (sdata->vif.csa_active)
1116 return;
1117
1118 current_band = cbss->channel->band;
1119 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1120 ifmgd->flags,
1121 ifmgd->associated->bssid, &csa_ie);
1122 if (res < 0)
1123 ieee80211_queue_work(&local->hw,
1124 &ifmgd->csa_connection_drop_work);
1125 if (res)
1126 return;
1127
1128 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1129 IEEE80211_CHAN_DISABLED)) {
1130 sdata_info(sdata,
1131 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1132 ifmgd->associated->bssid,
1133 csa_ie.chandef.chan->center_freq,
1134 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1135 csa_ie.chandef.center_freq2);
1136 ieee80211_queue_work(&local->hw,
1137 &ifmgd->csa_connection_drop_work);
1138 return;
1139 }
1140
1141 if (cfg80211_chandef_identical(&csa_ie.chandef,
1142 &sdata->vif.bss_conf.chandef)) {
1143 if (ifmgd->csa_ignored_same_chan)
1144 return;
1145 sdata_info(sdata,
1146 "AP %pM tries to chanswitch to same channel, ignore\n",
1147 ifmgd->associated->bssid);
1148 ifmgd->csa_ignored_same_chan = true;
1149 return;
1150 }
1151
1152 /*
1153 * Drop all TDLS peers - either we disconnect or move to a different
1154 * channel from this point on. There's no telling what our peer will do.
1155 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1156 * have an incompatible wider chandef.
1157 */
1158 ieee80211_teardown_tdls_peers(sdata);
1159
1160 mutex_lock(&local->mtx);
1161 mutex_lock(&local->chanctx_mtx);
1162 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1163 lockdep_is_held(&local->chanctx_mtx));
1164 if (!conf) {
1165 sdata_info(sdata,
1166 "no channel context assigned to vif?, disconnecting\n");
1167 goto drop_connection;
1168 }
1169
1170 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1171
1172 if (local->use_chanctx &&
1173 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1174 sdata_info(sdata,
1175 "driver doesn't support chan-switch with channel contexts\n");
1176 goto drop_connection;
1177 }
1178
1179 ch_switch.timestamp = timestamp;
1180 ch_switch.device_timestamp = device_timestamp;
1181 ch_switch.block_tx = csa_ie.mode;
1182 ch_switch.chandef = csa_ie.chandef;
1183 ch_switch.count = csa_ie.count;
1184
1185 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1186 sdata_info(sdata,
1187 "preparing for channel switch failed, disconnecting\n");
1188 goto drop_connection;
1189 }
1190
1191 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1192 chanctx->mode, false);
1193 if (res) {
1194 sdata_info(sdata,
1195 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1196 res);
1197 goto drop_connection;
1198 }
1199 mutex_unlock(&local->chanctx_mtx);
1200
1201 sdata->vif.csa_active = true;
1202 sdata->csa_chandef = csa_ie.chandef;
1203 sdata->csa_block_tx = csa_ie.mode;
1204 ifmgd->csa_ignored_same_chan = false;
1205
1206 if (sdata->csa_block_tx)
1207 ieee80211_stop_vif_queues(local, sdata,
1208 IEEE80211_QUEUE_STOP_REASON_CSA);
1209 mutex_unlock(&local->mtx);
1210
1211 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1212 csa_ie.count);
1213
1214 if (local->ops->channel_switch) {
1215 /* use driver's channel switch callback */
1216 drv_channel_switch(local, sdata, &ch_switch);
1217 return;
1218 }
1219
1220 /* channel switch handled in software */
1221 if (csa_ie.count <= 1)
1222 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1223 else
1224 mod_timer(&ifmgd->chswitch_timer,
1225 TU_TO_EXP_TIME((csa_ie.count - 1) *
1226 cbss->beacon_interval));
1227 return;
1228 drop_connection:
1229 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1230 mutex_unlock(&local->chanctx_mtx);
1231 mutex_unlock(&local->mtx);
1232 }
1233
1234 static bool
1235 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1236 struct ieee80211_channel *channel,
1237 const u8 *country_ie, u8 country_ie_len,
1238 const u8 *pwr_constr_elem,
1239 int *chan_pwr, int *pwr_reduction)
1240 {
1241 struct ieee80211_country_ie_triplet *triplet;
1242 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1243 int i, chan_increment;
1244 bool have_chan_pwr = false;
1245
1246 /* Invalid IE */
1247 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1248 return false;
1249
1250 triplet = (void *)(country_ie + 3);
1251 country_ie_len -= 3;
1252
1253 switch (channel->band) {
1254 default:
1255 WARN_ON_ONCE(1);
1256 /* fall through */
1257 case NL80211_BAND_2GHZ:
1258 case NL80211_BAND_60GHZ:
1259 chan_increment = 1;
1260 break;
1261 case NL80211_BAND_5GHZ:
1262 chan_increment = 4;
1263 break;
1264 }
1265
1266 /* find channel */
1267 while (country_ie_len >= 3) {
1268 u8 first_channel = triplet->chans.first_channel;
1269
1270 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1271 goto next;
1272
1273 for (i = 0; i < triplet->chans.num_channels; i++) {
1274 if (first_channel + i * chan_increment == chan) {
1275 have_chan_pwr = true;
1276 *chan_pwr = triplet->chans.max_power;
1277 break;
1278 }
1279 }
1280 if (have_chan_pwr)
1281 break;
1282
1283 next:
1284 triplet++;
1285 country_ie_len -= 3;
1286 }
1287
1288 if (have_chan_pwr && pwr_constr_elem)
1289 *pwr_reduction = *pwr_constr_elem;
1290 else
1291 *pwr_reduction = 0;
1292
1293 return have_chan_pwr;
1294 }
1295
1296 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1297 struct ieee80211_channel *channel,
1298 const u8 *cisco_dtpc_ie,
1299 int *pwr_level)
1300 {
1301 /* From practical testing, the first data byte of the DTPC element
1302 * seems to contain the requested dBm level, and the CLI on Cisco
1303 * APs clearly state the range is -127 to 127 dBm, which indicates
1304 * a signed byte, although it seemingly never actually goes negative.
1305 * The other byte seems to always be zero.
1306 */
1307 *pwr_level = (__s8)cisco_dtpc_ie[4];
1308 }
1309
1310 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1311 struct ieee80211_channel *channel,
1312 struct ieee80211_mgmt *mgmt,
1313 const u8 *country_ie, u8 country_ie_len,
1314 const u8 *pwr_constr_ie,
1315 const u8 *cisco_dtpc_ie)
1316 {
1317 bool has_80211h_pwr = false, has_cisco_pwr = false;
1318 int chan_pwr = 0, pwr_reduction_80211h = 0;
1319 int pwr_level_cisco, pwr_level_80211h;
1320 int new_ap_level;
1321 __le16 capab = mgmt->u.probe_resp.capab_info;
1322
1323 if (country_ie &&
1324 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1325 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1326 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1327 sdata, channel, country_ie, country_ie_len,
1328 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1329 pwr_level_80211h =
1330 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1331 }
1332
1333 if (cisco_dtpc_ie) {
1334 ieee80211_find_cisco_dtpc(
1335 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1336 has_cisco_pwr = true;
1337 }
1338
1339 if (!has_80211h_pwr && !has_cisco_pwr)
1340 return 0;
1341
1342 /* If we have both 802.11h and Cisco DTPC, apply both limits
1343 * by picking the smallest of the two power levels advertised.
1344 */
1345 if (has_80211h_pwr &&
1346 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1347 new_ap_level = pwr_level_80211h;
1348
1349 if (sdata->ap_power_level == new_ap_level)
1350 return 0;
1351
1352 sdata_dbg(sdata,
1353 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1354 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1355 sdata->u.mgd.bssid);
1356 } else { /* has_cisco_pwr is always true here. */
1357 new_ap_level = pwr_level_cisco;
1358
1359 if (sdata->ap_power_level == new_ap_level)
1360 return 0;
1361
1362 sdata_dbg(sdata,
1363 "Limiting TX power to %d dBm as advertised by %pM\n",
1364 pwr_level_cisco, sdata->u.mgd.bssid);
1365 }
1366
1367 sdata->ap_power_level = new_ap_level;
1368 if (__ieee80211_recalc_txpower(sdata))
1369 return BSS_CHANGED_TXPOWER;
1370 return 0;
1371 }
1372
1373 /* powersave */
1374 static void ieee80211_enable_ps(struct ieee80211_local *local,
1375 struct ieee80211_sub_if_data *sdata)
1376 {
1377 struct ieee80211_conf *conf = &local->hw.conf;
1378
1379 /*
1380 * If we are scanning right now then the parameters will
1381 * take effect when scan finishes.
1382 */
1383 if (local->scanning)
1384 return;
1385
1386 if (conf->dynamic_ps_timeout > 0 &&
1387 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1388 mod_timer(&local->dynamic_ps_timer, jiffies +
1389 msecs_to_jiffies(conf->dynamic_ps_timeout));
1390 } else {
1391 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1392 ieee80211_send_nullfunc(local, sdata, true);
1393
1394 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1395 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1396 return;
1397
1398 conf->flags |= IEEE80211_CONF_PS;
1399 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1400 }
1401 }
1402
1403 static void ieee80211_change_ps(struct ieee80211_local *local)
1404 {
1405 struct ieee80211_conf *conf = &local->hw.conf;
1406
1407 if (local->ps_sdata) {
1408 ieee80211_enable_ps(local, local->ps_sdata);
1409 } else if (conf->flags & IEEE80211_CONF_PS) {
1410 conf->flags &= ~IEEE80211_CONF_PS;
1411 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1412 del_timer_sync(&local->dynamic_ps_timer);
1413 cancel_work_sync(&local->dynamic_ps_enable_work);
1414 }
1415 }
1416
1417 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1418 {
1419 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1420 struct sta_info *sta = NULL;
1421 bool authorized = false;
1422
1423 if (!mgd->powersave)
1424 return false;
1425
1426 if (mgd->broken_ap)
1427 return false;
1428
1429 if (!mgd->associated)
1430 return false;
1431
1432 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1433 return false;
1434
1435 if (!mgd->have_beacon)
1436 return false;
1437
1438 rcu_read_lock();
1439 sta = sta_info_get(sdata, mgd->bssid);
1440 if (sta)
1441 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1442 rcu_read_unlock();
1443
1444 return authorized;
1445 }
1446
1447 /* need to hold RTNL or interface lock */
1448 void ieee80211_recalc_ps(struct ieee80211_local *local)
1449 {
1450 struct ieee80211_sub_if_data *sdata, *found = NULL;
1451 int count = 0;
1452 int timeout;
1453
1454 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1455 local->ps_sdata = NULL;
1456 return;
1457 }
1458
1459 list_for_each_entry(sdata, &local->interfaces, list) {
1460 if (!ieee80211_sdata_running(sdata))
1461 continue;
1462 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1463 /* If an AP vif is found, then disable PS
1464 * by setting the count to zero thereby setting
1465 * ps_sdata to NULL.
1466 */
1467 count = 0;
1468 break;
1469 }
1470 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1471 continue;
1472 found = sdata;
1473 count++;
1474 }
1475
1476 if (count == 1 && ieee80211_powersave_allowed(found)) {
1477 u8 dtimper = found->u.mgd.dtim_period;
1478
1479 timeout = local->dynamic_ps_forced_timeout;
1480 if (timeout < 0)
1481 timeout = 100;
1482 local->hw.conf.dynamic_ps_timeout = timeout;
1483
1484 /* If the TIM IE is invalid, pretend the value is 1 */
1485 if (!dtimper)
1486 dtimper = 1;
1487
1488 local->hw.conf.ps_dtim_period = dtimper;
1489 local->ps_sdata = found;
1490 } else {
1491 local->ps_sdata = NULL;
1492 }
1493
1494 ieee80211_change_ps(local);
1495 }
1496
1497 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1498 {
1499 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1500
1501 if (sdata->vif.bss_conf.ps != ps_allowed) {
1502 sdata->vif.bss_conf.ps = ps_allowed;
1503 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1504 }
1505 }
1506
1507 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1508 {
1509 struct ieee80211_local *local =
1510 container_of(work, struct ieee80211_local,
1511 dynamic_ps_disable_work);
1512
1513 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1514 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1515 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1516 }
1517
1518 ieee80211_wake_queues_by_reason(&local->hw,
1519 IEEE80211_MAX_QUEUE_MAP,
1520 IEEE80211_QUEUE_STOP_REASON_PS,
1521 false);
1522 }
1523
1524 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1525 {
1526 struct ieee80211_local *local =
1527 container_of(work, struct ieee80211_local,
1528 dynamic_ps_enable_work);
1529 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1530 struct ieee80211_if_managed *ifmgd;
1531 unsigned long flags;
1532 int q;
1533
1534 /* can only happen when PS was just disabled anyway */
1535 if (!sdata)
1536 return;
1537
1538 ifmgd = &sdata->u.mgd;
1539
1540 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1541 return;
1542
1543 if (local->hw.conf.dynamic_ps_timeout > 0) {
1544 /* don't enter PS if TX frames are pending */
1545 if (drv_tx_frames_pending(local)) {
1546 mod_timer(&local->dynamic_ps_timer, jiffies +
1547 msecs_to_jiffies(
1548 local->hw.conf.dynamic_ps_timeout));
1549 return;
1550 }
1551
1552 /*
1553 * transmission can be stopped by others which leads to
1554 * dynamic_ps_timer expiry. Postpone the ps timer if it
1555 * is not the actual idle state.
1556 */
1557 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1558 for (q = 0; q < local->hw.queues; q++) {
1559 if (local->queue_stop_reasons[q]) {
1560 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1561 flags);
1562 mod_timer(&local->dynamic_ps_timer, jiffies +
1563 msecs_to_jiffies(
1564 local->hw.conf.dynamic_ps_timeout));
1565 return;
1566 }
1567 }
1568 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1569 }
1570
1571 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1572 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1573 if (drv_tx_frames_pending(local)) {
1574 mod_timer(&local->dynamic_ps_timer, jiffies +
1575 msecs_to_jiffies(
1576 local->hw.conf.dynamic_ps_timeout));
1577 } else {
1578 ieee80211_send_nullfunc(local, sdata, true);
1579 /* Flush to get the tx status of nullfunc frame */
1580 ieee80211_flush_queues(local, sdata, false);
1581 }
1582 }
1583
1584 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1585 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1586 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1587 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1588 local->hw.conf.flags |= IEEE80211_CONF_PS;
1589 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1590 }
1591 }
1592
1593 void ieee80211_dynamic_ps_timer(unsigned long data)
1594 {
1595 struct ieee80211_local *local = (void *) data;
1596
1597 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1598 }
1599
1600 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1601 {
1602 struct delayed_work *delayed_work = to_delayed_work(work);
1603 struct ieee80211_sub_if_data *sdata =
1604 container_of(delayed_work, struct ieee80211_sub_if_data,
1605 dfs_cac_timer_work);
1606 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1607
1608 mutex_lock(&sdata->local->mtx);
1609 if (sdata->wdev.cac_started) {
1610 ieee80211_vif_release_channel(sdata);
1611 cfg80211_cac_event(sdata->dev, &chandef,
1612 NL80211_RADAR_CAC_FINISHED,
1613 GFP_KERNEL);
1614 }
1615 mutex_unlock(&sdata->local->mtx);
1616 }
1617
1618 static bool
1619 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1620 {
1621 struct ieee80211_local *local = sdata->local;
1622 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1623 bool ret = false;
1624 int ac;
1625
1626 if (local->hw.queues < IEEE80211_NUM_ACS)
1627 return false;
1628
1629 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1630 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1631 int non_acm_ac;
1632 unsigned long now = jiffies;
1633
1634 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1635 tx_tspec->admitted_time &&
1636 time_after(now, tx_tspec->time_slice_start + HZ)) {
1637 tx_tspec->consumed_tx_time = 0;
1638 tx_tspec->time_slice_start = now;
1639
1640 if (tx_tspec->downgraded)
1641 tx_tspec->action =
1642 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1643 }
1644
1645 switch (tx_tspec->action) {
1646 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1647 /* take the original parameters */
1648 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1649 sdata_err(sdata,
1650 "failed to set TX queue parameters for queue %d\n",
1651 ac);
1652 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1653 tx_tspec->downgraded = false;
1654 ret = true;
1655 break;
1656 case TX_TSPEC_ACTION_DOWNGRADE:
1657 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1658 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1659 ret = true;
1660 break;
1661 }
1662 /* downgrade next lower non-ACM AC */
1663 for (non_acm_ac = ac + 1;
1664 non_acm_ac < IEEE80211_NUM_ACS;
1665 non_acm_ac++)
1666 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1667 break;
1668 /* Usually the loop will result in using BK even if it
1669 * requires admission control, but such a configuration
1670 * makes no sense and we have to transmit somehow - the
1671 * AC selection does the same thing.
1672 * If we started out trying to downgrade from BK, then
1673 * the extra condition here might be needed.
1674 */
1675 if (non_acm_ac >= IEEE80211_NUM_ACS)
1676 non_acm_ac = IEEE80211_AC_BK;
1677 if (drv_conf_tx(local, sdata, ac,
1678 &sdata->tx_conf[non_acm_ac]))
1679 sdata_err(sdata,
1680 "failed to set TX queue parameters for queue %d\n",
1681 ac);
1682 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1683 ret = true;
1684 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1685 tx_tspec->time_slice_start + HZ - now + 1);
1686 break;
1687 case TX_TSPEC_ACTION_NONE:
1688 /* nothing now */
1689 break;
1690 }
1691 }
1692
1693 return ret;
1694 }
1695
1696 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1697 {
1698 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1699 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1700 }
1701
1702 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1703 {
1704 struct ieee80211_sub_if_data *sdata;
1705
1706 sdata = container_of(work, struct ieee80211_sub_if_data,
1707 u.mgd.tx_tspec_wk.work);
1708 ieee80211_sta_handle_tspec_ac_params(sdata);
1709 }
1710
1711 /* MLME */
1712 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1713 struct ieee80211_sub_if_data *sdata,
1714 const u8 *wmm_param, size_t wmm_param_len)
1715 {
1716 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1717 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1718 size_t left;
1719 int count, ac;
1720 const u8 *pos;
1721 u8 uapsd_queues = 0;
1722
1723 if (!local->ops->conf_tx)
1724 return false;
1725
1726 if (local->hw.queues < IEEE80211_NUM_ACS)
1727 return false;
1728
1729 if (!wmm_param)
1730 return false;
1731
1732 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1733 return false;
1734
1735 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1736 uapsd_queues = ifmgd->uapsd_queues;
1737
1738 count = wmm_param[6] & 0x0f;
1739 if (count == ifmgd->wmm_last_param_set)
1740 return false;
1741 ifmgd->wmm_last_param_set = count;
1742
1743 pos = wmm_param + 8;
1744 left = wmm_param_len - 8;
1745
1746 memset(&params, 0, sizeof(params));
1747
1748 sdata->wmm_acm = 0;
1749 for (; left >= 4; left -= 4, pos += 4) {
1750 int aci = (pos[0] >> 5) & 0x03;
1751 int acm = (pos[0] >> 4) & 0x01;
1752 bool uapsd = false;
1753
1754 switch (aci) {
1755 case 1: /* AC_BK */
1756 ac = IEEE80211_AC_BK;
1757 if (acm)
1758 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1759 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1760 uapsd = true;
1761 break;
1762 case 2: /* AC_VI */
1763 ac = IEEE80211_AC_VI;
1764 if (acm)
1765 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1766 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1767 uapsd = true;
1768 break;
1769 case 3: /* AC_VO */
1770 ac = IEEE80211_AC_VO;
1771 if (acm)
1772 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1773 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1774 uapsd = true;
1775 break;
1776 case 0: /* AC_BE */
1777 default:
1778 ac = IEEE80211_AC_BE;
1779 if (acm)
1780 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1781 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1782 uapsd = true;
1783 break;
1784 }
1785
1786 params[ac].aifs = pos[0] & 0x0f;
1787
1788 if (params[ac].aifs < 2) {
1789 sdata_info(sdata,
1790 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1791 params[ac].aifs, aci);
1792 params[ac].aifs = 2;
1793 }
1794 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1795 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1796 params[ac].txop = get_unaligned_le16(pos + 2);
1797 params[ac].acm = acm;
1798 params[ac].uapsd = uapsd;
1799
1800 if (params[ac].cw_min > params[ac].cw_max) {
1801 sdata_info(sdata,
1802 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1803 params[ac].cw_min, params[ac].cw_max, aci);
1804 return false;
1805 }
1806 }
1807
1808 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1809 mlme_dbg(sdata,
1810 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1811 ac, params[ac].acm,
1812 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1813 params[ac].txop, params[ac].uapsd,
1814 ifmgd->tx_tspec[ac].downgraded);
1815 sdata->tx_conf[ac] = params[ac];
1816 if (!ifmgd->tx_tspec[ac].downgraded &&
1817 drv_conf_tx(local, sdata, ac, &params[ac]))
1818 sdata_err(sdata,
1819 "failed to set TX queue parameters for AC %d\n",
1820 ac);
1821 }
1822
1823 /* enable WMM or activate new settings */
1824 sdata->vif.bss_conf.qos = true;
1825 return true;
1826 }
1827
1828 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1829 {
1830 lockdep_assert_held(&sdata->local->mtx);
1831
1832 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1833 ieee80211_run_deferred_scan(sdata->local);
1834 }
1835
1836 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1837 {
1838 mutex_lock(&sdata->local->mtx);
1839 __ieee80211_stop_poll(sdata);
1840 mutex_unlock(&sdata->local->mtx);
1841 }
1842
1843 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1844 u16 capab, bool erp_valid, u8 erp)
1845 {
1846 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1847 struct ieee80211_supported_band *sband;
1848 u32 changed = 0;
1849 bool use_protection;
1850 bool use_short_preamble;
1851 bool use_short_slot;
1852
1853 sband = ieee80211_get_sband(sdata);
1854 if (!sband)
1855 return changed;
1856
1857 if (erp_valid) {
1858 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1859 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1860 } else {
1861 use_protection = false;
1862 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1863 }
1864
1865 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1866 if (sband->band == NL80211_BAND_5GHZ)
1867 use_short_slot = true;
1868
1869 if (use_protection != bss_conf->use_cts_prot) {
1870 bss_conf->use_cts_prot = use_protection;
1871 changed |= BSS_CHANGED_ERP_CTS_PROT;
1872 }
1873
1874 if (use_short_preamble != bss_conf->use_short_preamble) {
1875 bss_conf->use_short_preamble = use_short_preamble;
1876 changed |= BSS_CHANGED_ERP_PREAMBLE;
1877 }
1878
1879 if (use_short_slot != bss_conf->use_short_slot) {
1880 bss_conf->use_short_slot = use_short_slot;
1881 changed |= BSS_CHANGED_ERP_SLOT;
1882 }
1883
1884 return changed;
1885 }
1886
1887 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1888 struct cfg80211_bss *cbss,
1889 u32 bss_info_changed)
1890 {
1891 struct ieee80211_bss *bss = (void *)cbss->priv;
1892 struct ieee80211_local *local = sdata->local;
1893 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1894
1895 bss_info_changed |= BSS_CHANGED_ASSOC;
1896 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1897 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1898
1899 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1900 beacon_loss_count * bss_conf->beacon_int));
1901
1902 sdata->u.mgd.associated = cbss;
1903 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1904
1905 ieee80211_check_rate_mask(sdata);
1906
1907 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1908
1909 if (sdata->vif.p2p ||
1910 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
1911 const struct cfg80211_bss_ies *ies;
1912
1913 rcu_read_lock();
1914 ies = rcu_dereference(cbss->ies);
1915 if (ies) {
1916 int ret;
1917
1918 ret = cfg80211_get_p2p_attr(
1919 ies->data, ies->len,
1920 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1921 (u8 *) &bss_conf->p2p_noa_attr,
1922 sizeof(bss_conf->p2p_noa_attr));
1923 if (ret >= 2) {
1924 sdata->u.mgd.p2p_noa_index =
1925 bss_conf->p2p_noa_attr.index;
1926 bss_info_changed |= BSS_CHANGED_P2P_PS;
1927 }
1928 }
1929 rcu_read_unlock();
1930 }
1931
1932 /* just to be sure */
1933 ieee80211_stop_poll(sdata);
1934
1935 ieee80211_led_assoc(local, 1);
1936
1937 if (sdata->u.mgd.have_beacon) {
1938 /*
1939 * If the AP is buggy we may get here with no DTIM period
1940 * known, so assume it's 1 which is the only safe assumption
1941 * in that case, although if the TIM IE is broken powersave
1942 * probably just won't work at all.
1943 */
1944 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1945 bss_conf->beacon_rate = bss->beacon_rate;
1946 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1947 } else {
1948 bss_conf->beacon_rate = NULL;
1949 bss_conf->dtim_period = 0;
1950 }
1951
1952 bss_conf->assoc = 1;
1953
1954 /* Tell the driver to monitor connection quality (if supported) */
1955 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1956 bss_conf->cqm_rssi_thold)
1957 bss_info_changed |= BSS_CHANGED_CQM;
1958
1959 /* Enable ARP filtering */
1960 if (bss_conf->arp_addr_cnt)
1961 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1962
1963 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1964
1965 mutex_lock(&local->iflist_mtx);
1966 ieee80211_recalc_ps(local);
1967 mutex_unlock(&local->iflist_mtx);
1968
1969 ieee80211_recalc_smps(sdata);
1970 ieee80211_recalc_ps_vif(sdata);
1971
1972 netif_carrier_on(sdata->dev);
1973 }
1974
1975 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1976 u16 stype, u16 reason, bool tx,
1977 u8 *frame_buf)
1978 {
1979 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1980 struct ieee80211_local *local = sdata->local;
1981 u32 changed = 0;
1982
1983 sdata_assert_lock(sdata);
1984
1985 if (WARN_ON_ONCE(tx && !frame_buf))
1986 return;
1987
1988 if (WARN_ON(!ifmgd->associated))
1989 return;
1990
1991 ieee80211_stop_poll(sdata);
1992
1993 ifmgd->associated = NULL;
1994 netif_carrier_off(sdata->dev);
1995
1996 /*
1997 * if we want to get out of ps before disassoc (why?) we have
1998 * to do it before sending disassoc, as otherwise the null-packet
1999 * won't be valid.
2000 */
2001 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2002 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2003 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2004 }
2005 local->ps_sdata = NULL;
2006
2007 /* disable per-vif ps */
2008 ieee80211_recalc_ps_vif(sdata);
2009
2010 /* make sure ongoing transmission finishes */
2011 synchronize_net();
2012
2013 /*
2014 * drop any frame before deauth/disassoc, this can be data or
2015 * management frame. Since we are disconnecting, we should not
2016 * insist sending these frames which can take time and delay
2017 * the disconnection and possible the roaming.
2018 */
2019 if (tx)
2020 ieee80211_flush_queues(local, sdata, true);
2021
2022 /* deauthenticate/disassociate now */
2023 if (tx || frame_buf)
2024 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2025 reason, tx, frame_buf);
2026
2027 /* flush out frame - make sure the deauth was actually sent */
2028 if (tx)
2029 ieee80211_flush_queues(local, sdata, false);
2030
2031 /* clear bssid only after building the needed mgmt frames */
2032 eth_zero_addr(ifmgd->bssid);
2033
2034 /* remove AP and TDLS peers */
2035 sta_info_flush(sdata);
2036
2037 /* finally reset all BSS / config parameters */
2038 changed |= ieee80211_reset_erp_info(sdata);
2039
2040 ieee80211_led_assoc(local, 0);
2041 changed |= BSS_CHANGED_ASSOC;
2042 sdata->vif.bss_conf.assoc = false;
2043
2044 ifmgd->p2p_noa_index = -1;
2045 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2046 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2047
2048 /* on the next assoc, re-program HT/VHT parameters */
2049 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2050 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2051 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2052 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2053
2054 /* reset MU-MIMO ownership and group data */
2055 memset(sdata->vif.bss_conf.mu_group.membership, 0,
2056 sizeof(sdata->vif.bss_conf.mu_group.membership));
2057 memset(sdata->vif.bss_conf.mu_group.position, 0,
2058 sizeof(sdata->vif.bss_conf.mu_group.position));
2059 changed |= BSS_CHANGED_MU_GROUPS;
2060 sdata->vif.mu_mimo_owner = false;
2061
2062 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2063
2064 del_timer_sync(&local->dynamic_ps_timer);
2065 cancel_work_sync(&local->dynamic_ps_enable_work);
2066
2067 /* Disable ARP filtering */
2068 if (sdata->vif.bss_conf.arp_addr_cnt)
2069 changed |= BSS_CHANGED_ARP_FILTER;
2070
2071 sdata->vif.bss_conf.qos = false;
2072 changed |= BSS_CHANGED_QOS;
2073
2074 /* The BSSID (not really interesting) and HT changed */
2075 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2076 ieee80211_bss_info_change_notify(sdata, changed);
2077
2078 /* disassociated - set to defaults now */
2079 ieee80211_set_wmm_default(sdata, false, false);
2080
2081 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2082 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2083 del_timer_sync(&sdata->u.mgd.timer);
2084 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2085
2086 sdata->vif.bss_conf.dtim_period = 0;
2087 sdata->vif.bss_conf.beacon_rate = NULL;
2088
2089 ifmgd->have_beacon = false;
2090
2091 ifmgd->flags = 0;
2092 mutex_lock(&local->mtx);
2093 ieee80211_vif_release_channel(sdata);
2094
2095 sdata->vif.csa_active = false;
2096 ifmgd->csa_waiting_bcn = false;
2097 ifmgd->csa_ignored_same_chan = false;
2098 if (sdata->csa_block_tx) {
2099 ieee80211_wake_vif_queues(local, sdata,
2100 IEEE80211_QUEUE_STOP_REASON_CSA);
2101 sdata->csa_block_tx = false;
2102 }
2103 mutex_unlock(&local->mtx);
2104
2105 /* existing TX TSPEC sessions no longer exist */
2106 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2107 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2108
2109 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2110 }
2111
2112 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2113 struct ieee80211_hdr *hdr)
2114 {
2115 /*
2116 * We can postpone the mgd.timer whenever receiving unicast frames
2117 * from AP because we know that the connection is working both ways
2118 * at that time. But multicast frames (and hence also beacons) must
2119 * be ignored here, because we need to trigger the timer during
2120 * data idle periods for sending the periodic probe request to the
2121 * AP we're connected to.
2122 */
2123 if (is_multicast_ether_addr(hdr->addr1))
2124 return;
2125
2126 ieee80211_sta_reset_conn_monitor(sdata);
2127 }
2128
2129 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2130 {
2131 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2132 struct ieee80211_local *local = sdata->local;
2133
2134 mutex_lock(&local->mtx);
2135 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2136 goto out;
2137
2138 __ieee80211_stop_poll(sdata);
2139
2140 mutex_lock(&local->iflist_mtx);
2141 ieee80211_recalc_ps(local);
2142 mutex_unlock(&local->iflist_mtx);
2143
2144 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2145 goto out;
2146
2147 /*
2148 * We've received a probe response, but are not sure whether
2149 * we have or will be receiving any beacons or data, so let's
2150 * schedule the timers again, just in case.
2151 */
2152 ieee80211_sta_reset_beacon_monitor(sdata);
2153
2154 mod_timer(&ifmgd->conn_mon_timer,
2155 round_jiffies_up(jiffies +
2156 IEEE80211_CONNECTION_IDLE_TIME));
2157 out:
2158 mutex_unlock(&local->mtx);
2159 }
2160
2161 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2162 struct ieee80211_hdr *hdr,
2163 u16 tx_time)
2164 {
2165 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2166 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2167 int ac = ieee80211_ac_from_tid(tid);
2168 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2169 unsigned long now = jiffies;
2170
2171 if (likely(!tx_tspec->admitted_time))
2172 return;
2173
2174 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2175 tx_tspec->consumed_tx_time = 0;
2176 tx_tspec->time_slice_start = now;
2177
2178 if (tx_tspec->downgraded) {
2179 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2180 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2181 }
2182 }
2183
2184 if (tx_tspec->downgraded)
2185 return;
2186
2187 tx_tspec->consumed_tx_time += tx_time;
2188
2189 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2190 tx_tspec->downgraded = true;
2191 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2192 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2193 }
2194 }
2195
2196 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2197 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2198 {
2199 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2200
2201 if (!ieee80211_is_data(hdr->frame_control))
2202 return;
2203
2204 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2205 sdata->u.mgd.probe_send_count > 0) {
2206 if (ack)
2207 ieee80211_sta_reset_conn_monitor(sdata);
2208 else
2209 sdata->u.mgd.nullfunc_failed = true;
2210 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2211 return;
2212 }
2213
2214 if (ack)
2215 ieee80211_sta_reset_conn_monitor(sdata);
2216 }
2217
2218 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2219 {
2220 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2221 const u8 *ssid;
2222 u8 *dst = ifmgd->associated->bssid;
2223 u8 unicast_limit = max(1, max_probe_tries - 3);
2224 struct sta_info *sta;
2225
2226 /*
2227 * Try sending broadcast probe requests for the last three
2228 * probe requests after the first ones failed since some
2229 * buggy APs only support broadcast probe requests.
2230 */
2231 if (ifmgd->probe_send_count >= unicast_limit)
2232 dst = NULL;
2233
2234 /*
2235 * When the hardware reports an accurate Tx ACK status, it's
2236 * better to send a nullfunc frame instead of a probe request,
2237 * as it will kick us off the AP quickly if we aren't associated
2238 * anymore. The timeout will be reset if the frame is ACKed by
2239 * the AP.
2240 */
2241 ifmgd->probe_send_count++;
2242
2243 if (dst) {
2244 mutex_lock(&sdata->local->sta_mtx);
2245 sta = sta_info_get(sdata, dst);
2246 if (!WARN_ON(!sta))
2247 ieee80211_check_fast_rx(sta);
2248 mutex_unlock(&sdata->local->sta_mtx);
2249 }
2250
2251 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2252 ifmgd->nullfunc_failed = false;
2253 ieee80211_send_nullfunc(sdata->local, sdata, false);
2254 } else {
2255 int ssid_len;
2256
2257 rcu_read_lock();
2258 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2259 if (WARN_ON_ONCE(ssid == NULL))
2260 ssid_len = 0;
2261 else
2262 ssid_len = ssid[1];
2263
2264 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2265 ssid + 2, ssid_len, NULL,
2266 0, (u32) -1, true, 0,
2267 ifmgd->associated->channel, false);
2268 rcu_read_unlock();
2269 }
2270
2271 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2272 run_again(sdata, ifmgd->probe_timeout);
2273 }
2274
2275 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2276 bool beacon)
2277 {
2278 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2279 bool already = false;
2280
2281 if (!ieee80211_sdata_running(sdata))
2282 return;
2283
2284 sdata_lock(sdata);
2285
2286 if (!ifmgd->associated)
2287 goto out;
2288
2289 mutex_lock(&sdata->local->mtx);
2290
2291 if (sdata->local->tmp_channel || sdata->local->scanning) {
2292 mutex_unlock(&sdata->local->mtx);
2293 goto out;
2294 }
2295
2296 if (beacon) {
2297 mlme_dbg_ratelimited(sdata,
2298 "detected beacon loss from AP (missed %d beacons) - probing\n",
2299 beacon_loss_count);
2300
2301 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2302 }
2303
2304 /*
2305 * The driver/our work has already reported this event or the
2306 * connection monitoring has kicked in and we have already sent
2307 * a probe request. Or maybe the AP died and the driver keeps
2308 * reporting until we disassociate...
2309 *
2310 * In either case we have to ignore the current call to this
2311 * function (except for setting the correct probe reason bit)
2312 * because otherwise we would reset the timer every time and
2313 * never check whether we received a probe response!
2314 */
2315 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2316 already = true;
2317
2318 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2319
2320 mutex_unlock(&sdata->local->mtx);
2321
2322 if (already)
2323 goto out;
2324
2325 mutex_lock(&sdata->local->iflist_mtx);
2326 ieee80211_recalc_ps(sdata->local);
2327 mutex_unlock(&sdata->local->iflist_mtx);
2328
2329 ifmgd->probe_send_count = 0;
2330 ieee80211_mgd_probe_ap_send(sdata);
2331 out:
2332 sdata_unlock(sdata);
2333 }
2334
2335 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2336 struct ieee80211_vif *vif)
2337 {
2338 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2339 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2340 struct cfg80211_bss *cbss;
2341 struct sk_buff *skb;
2342 const u8 *ssid;
2343 int ssid_len;
2344
2345 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2346 return NULL;
2347
2348 sdata_assert_lock(sdata);
2349
2350 if (ifmgd->associated)
2351 cbss = ifmgd->associated;
2352 else if (ifmgd->auth_data)
2353 cbss = ifmgd->auth_data->bss;
2354 else if (ifmgd->assoc_data)
2355 cbss = ifmgd->assoc_data->bss;
2356 else
2357 return NULL;
2358
2359 rcu_read_lock();
2360 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2361 if (WARN_ON_ONCE(ssid == NULL))
2362 ssid_len = 0;
2363 else
2364 ssid_len = ssid[1];
2365
2366 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2367 (u32) -1, cbss->channel,
2368 ssid + 2, ssid_len,
2369 NULL, 0, true);
2370 rcu_read_unlock();
2371
2372 return skb;
2373 }
2374 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2375
2376 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2377 const u8 *buf, size_t len, bool tx,
2378 u16 reason)
2379 {
2380 struct ieee80211_event event = {
2381 .type = MLME_EVENT,
2382 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2383 .u.mlme.reason = reason,
2384 };
2385
2386 if (tx)
2387 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2388 else
2389 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2390
2391 drv_event_callback(sdata->local, sdata, &event);
2392 }
2393
2394 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2395 {
2396 struct ieee80211_local *local = sdata->local;
2397 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2398 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2399
2400 sdata_lock(sdata);
2401 if (!ifmgd->associated) {
2402 sdata_unlock(sdata);
2403 return;
2404 }
2405
2406 /* AP is probably out of range (or not reachable for another reason) so
2407 * remove the bss struct for that AP.
2408 */
2409 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2410
2411 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2412 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2413 true, frame_buf);
2414 mutex_lock(&local->mtx);
2415 sdata->vif.csa_active = false;
2416 ifmgd->csa_waiting_bcn = false;
2417 if (sdata->csa_block_tx) {
2418 ieee80211_wake_vif_queues(local, sdata,
2419 IEEE80211_QUEUE_STOP_REASON_CSA);
2420 sdata->csa_block_tx = false;
2421 }
2422 mutex_unlock(&local->mtx);
2423
2424 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2425 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2426
2427 sdata_unlock(sdata);
2428 }
2429
2430 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2431 {
2432 struct ieee80211_sub_if_data *sdata =
2433 container_of(work, struct ieee80211_sub_if_data,
2434 u.mgd.beacon_connection_loss_work);
2435 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2436
2437 if (ifmgd->associated)
2438 ifmgd->beacon_loss_count++;
2439
2440 if (ifmgd->connection_loss) {
2441 sdata_info(sdata, "Connection to AP %pM lost\n",
2442 ifmgd->bssid);
2443 __ieee80211_disconnect(sdata);
2444 } else {
2445 ieee80211_mgd_probe_ap(sdata, true);
2446 }
2447 }
2448
2449 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2450 {
2451 struct ieee80211_sub_if_data *sdata =
2452 container_of(work, struct ieee80211_sub_if_data,
2453 u.mgd.csa_connection_drop_work);
2454
2455 __ieee80211_disconnect(sdata);
2456 }
2457
2458 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2459 {
2460 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2461 struct ieee80211_hw *hw = &sdata->local->hw;
2462
2463 trace_api_beacon_loss(sdata);
2464
2465 sdata->u.mgd.connection_loss = false;
2466 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2467 }
2468 EXPORT_SYMBOL(ieee80211_beacon_loss);
2469
2470 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2471 {
2472 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2473 struct ieee80211_hw *hw = &sdata->local->hw;
2474
2475 trace_api_connection_loss(sdata);
2476
2477 sdata->u.mgd.connection_loss = true;
2478 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2479 }
2480 EXPORT_SYMBOL(ieee80211_connection_loss);
2481
2482
2483 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2484 bool assoc)
2485 {
2486 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2487
2488 sdata_assert_lock(sdata);
2489
2490 if (!assoc) {
2491 /*
2492 * we are not authenticated yet, the only timer that could be
2493 * running is the timeout for the authentication response which
2494 * which is not relevant anymore.
2495 */
2496 del_timer_sync(&sdata->u.mgd.timer);
2497 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2498
2499 eth_zero_addr(sdata->u.mgd.bssid);
2500 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2501 sdata->u.mgd.flags = 0;
2502 mutex_lock(&sdata->local->mtx);
2503 ieee80211_vif_release_channel(sdata);
2504 mutex_unlock(&sdata->local->mtx);
2505 }
2506
2507 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2508 kfree(auth_data);
2509 sdata->u.mgd.auth_data = NULL;
2510 }
2511
2512 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2513 bool assoc, bool abandon)
2514 {
2515 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2516
2517 sdata_assert_lock(sdata);
2518
2519 if (!assoc) {
2520 /*
2521 * we are not associated yet, the only timer that could be
2522 * running is the timeout for the association response which
2523 * which is not relevant anymore.
2524 */
2525 del_timer_sync(&sdata->u.mgd.timer);
2526 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2527
2528 eth_zero_addr(sdata->u.mgd.bssid);
2529 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2530 sdata->u.mgd.flags = 0;
2531 sdata->vif.mu_mimo_owner = false;
2532
2533 mutex_lock(&sdata->local->mtx);
2534 ieee80211_vif_release_channel(sdata);
2535 mutex_unlock(&sdata->local->mtx);
2536
2537 if (abandon)
2538 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2539 }
2540
2541 kfree(assoc_data);
2542 sdata->u.mgd.assoc_data = NULL;
2543 }
2544
2545 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2546 struct ieee80211_mgmt *mgmt, size_t len)
2547 {
2548 struct ieee80211_local *local = sdata->local;
2549 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2550 u8 *pos;
2551 struct ieee802_11_elems elems;
2552 u32 tx_flags = 0;
2553
2554 pos = mgmt->u.auth.variable;
2555 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2556 if (!elems.challenge)
2557 return;
2558 auth_data->expected_transaction = 4;
2559 drv_mgd_prepare_tx(sdata->local, sdata);
2560 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2561 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2562 IEEE80211_TX_INTFL_MLME_CONN_TX;
2563 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2564 elems.challenge - 2, elems.challenge_len + 2,
2565 auth_data->bss->bssid, auth_data->bss->bssid,
2566 auth_data->key, auth_data->key_len,
2567 auth_data->key_idx, tx_flags);
2568 }
2569
2570 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2571 struct ieee80211_mgmt *mgmt, size_t len)
2572 {
2573 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2574 u8 bssid[ETH_ALEN];
2575 u16 auth_alg, auth_transaction, status_code;
2576 struct sta_info *sta;
2577 struct ieee80211_event event = {
2578 .type = MLME_EVENT,
2579 .u.mlme.data = AUTH_EVENT,
2580 };
2581
2582 sdata_assert_lock(sdata);
2583
2584 if (len < 24 + 6)
2585 return;
2586
2587 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2588 return;
2589
2590 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2591
2592 if (!ether_addr_equal(bssid, mgmt->bssid))
2593 return;
2594
2595 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2596 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2597 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2598
2599 if (auth_alg != ifmgd->auth_data->algorithm ||
2600 auth_transaction != ifmgd->auth_data->expected_transaction) {
2601 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2602 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2603 auth_transaction,
2604 ifmgd->auth_data->expected_transaction);
2605 return;
2606 }
2607
2608 if (status_code != WLAN_STATUS_SUCCESS) {
2609 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2610 mgmt->sa, status_code);
2611 ieee80211_destroy_auth_data(sdata, false);
2612 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2613 event.u.mlme.status = MLME_DENIED;
2614 event.u.mlme.reason = status_code;
2615 drv_event_callback(sdata->local, sdata, &event);
2616 return;
2617 }
2618
2619 switch (ifmgd->auth_data->algorithm) {
2620 case WLAN_AUTH_OPEN:
2621 case WLAN_AUTH_LEAP:
2622 case WLAN_AUTH_FT:
2623 case WLAN_AUTH_SAE:
2624 case WLAN_AUTH_FILS_SK:
2625 case WLAN_AUTH_FILS_SK_PFS:
2626 case WLAN_AUTH_FILS_PK:
2627 break;
2628 case WLAN_AUTH_SHARED_KEY:
2629 if (ifmgd->auth_data->expected_transaction != 4) {
2630 ieee80211_auth_challenge(sdata, mgmt, len);
2631 /* need another frame */
2632 return;
2633 }
2634 break;
2635 default:
2636 WARN_ONCE(1, "invalid auth alg %d",
2637 ifmgd->auth_data->algorithm);
2638 return;
2639 }
2640
2641 event.u.mlme.status = MLME_SUCCESS;
2642 drv_event_callback(sdata->local, sdata, &event);
2643 sdata_info(sdata, "authenticated\n");
2644 ifmgd->auth_data->done = true;
2645 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2646 ifmgd->auth_data->timeout_started = true;
2647 run_again(sdata, ifmgd->auth_data->timeout);
2648
2649 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2650 ifmgd->auth_data->expected_transaction != 2) {
2651 /*
2652 * Report auth frame to user space for processing since another
2653 * round of Authentication frames is still needed.
2654 */
2655 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2656 return;
2657 }
2658
2659 /* move station state to auth */
2660 mutex_lock(&sdata->local->sta_mtx);
2661 sta = sta_info_get(sdata, bssid);
2662 if (!sta) {
2663 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2664 goto out_err;
2665 }
2666 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2667 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2668 goto out_err;
2669 }
2670 mutex_unlock(&sdata->local->sta_mtx);
2671
2672 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2673 return;
2674 out_err:
2675 mutex_unlock(&sdata->local->sta_mtx);
2676 /* ignore frame -- wait for timeout */
2677 }
2678
2679 #define case_WLAN(type) \
2680 case WLAN_REASON_##type: return #type
2681
2682 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2683 {
2684 switch (reason_code) {
2685 case_WLAN(UNSPECIFIED);
2686 case_WLAN(PREV_AUTH_NOT_VALID);
2687 case_WLAN(DEAUTH_LEAVING);
2688 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2689 case_WLAN(DISASSOC_AP_BUSY);
2690 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2691 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2692 case_WLAN(DISASSOC_STA_HAS_LEFT);
2693 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2694 case_WLAN(DISASSOC_BAD_POWER);
2695 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2696 case_WLAN(INVALID_IE);
2697 case_WLAN(MIC_FAILURE);
2698 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2699 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2700 case_WLAN(IE_DIFFERENT);
2701 case_WLAN(INVALID_GROUP_CIPHER);
2702 case_WLAN(INVALID_PAIRWISE_CIPHER);
2703 case_WLAN(INVALID_AKMP);
2704 case_WLAN(UNSUPP_RSN_VERSION);
2705 case_WLAN(INVALID_RSN_IE_CAP);
2706 case_WLAN(IEEE8021X_FAILED);
2707 case_WLAN(CIPHER_SUITE_REJECTED);
2708 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2709 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2710 case_WLAN(DISASSOC_LOW_ACK);
2711 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2712 case_WLAN(QSTA_LEAVE_QBSS);
2713 case_WLAN(QSTA_NOT_USE);
2714 case_WLAN(QSTA_REQUIRE_SETUP);
2715 case_WLAN(QSTA_TIMEOUT);
2716 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2717 case_WLAN(MESH_PEER_CANCELED);
2718 case_WLAN(MESH_MAX_PEERS);
2719 case_WLAN(MESH_CONFIG);
2720 case_WLAN(MESH_CLOSE);
2721 case_WLAN(MESH_MAX_RETRIES);
2722 case_WLAN(MESH_CONFIRM_TIMEOUT);
2723 case_WLAN(MESH_INVALID_GTK);
2724 case_WLAN(MESH_INCONSISTENT_PARAM);
2725 case_WLAN(MESH_INVALID_SECURITY);
2726 case_WLAN(MESH_PATH_ERROR);
2727 case_WLAN(MESH_PATH_NOFORWARD);
2728 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2729 case_WLAN(MAC_EXISTS_IN_MBSS);
2730 case_WLAN(MESH_CHAN_REGULATORY);
2731 case_WLAN(MESH_CHAN);
2732 default: return "<unknown>";
2733 }
2734 }
2735
2736 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2737 struct ieee80211_mgmt *mgmt, size_t len)
2738 {
2739 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2740 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2741
2742 sdata_assert_lock(sdata);
2743
2744 if (len < 24 + 2)
2745 return;
2746
2747 if (ifmgd->associated &&
2748 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2749 const u8 *bssid = ifmgd->associated->bssid;
2750
2751 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2752 bssid, reason_code,
2753 ieee80211_get_reason_code_string(reason_code));
2754
2755 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2756
2757 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2758 reason_code);
2759 return;
2760 }
2761
2762 if (ifmgd->assoc_data &&
2763 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2764 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2765
2766 sdata_info(sdata,
2767 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2768 bssid, reason_code,
2769 ieee80211_get_reason_code_string(reason_code));
2770
2771 ieee80211_destroy_assoc_data(sdata, false, true);
2772
2773 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2774 return;
2775 }
2776 }
2777
2778
2779 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2780 struct ieee80211_mgmt *mgmt, size_t len)
2781 {
2782 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2783 u16 reason_code;
2784
2785 sdata_assert_lock(sdata);
2786
2787 if (len < 24 + 2)
2788 return;
2789
2790 if (!ifmgd->associated ||
2791 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2792 return;
2793
2794 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2795
2796 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
2797 mgmt->sa, reason_code,
2798 ieee80211_get_reason_code_string(reason_code));
2799
2800 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2801
2802 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2803 }
2804
2805 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2806 u8 *supp_rates, unsigned int supp_rates_len,
2807 u32 *rates, u32 *basic_rates,
2808 bool *have_higher_than_11mbit,
2809 int *min_rate, int *min_rate_index,
2810 int shift)
2811 {
2812 int i, j;
2813
2814 for (i = 0; i < supp_rates_len; i++) {
2815 int rate = supp_rates[i] & 0x7f;
2816 bool is_basic = !!(supp_rates[i] & 0x80);
2817
2818 if ((rate * 5 * (1 << shift)) > 110)
2819 *have_higher_than_11mbit = true;
2820
2821 /*
2822 * Skip HT and VHT BSS membership selectors since they're not
2823 * rates.
2824 *
2825 * Note: Even though the membership selector and the basic
2826 * rate flag share the same bit, they are not exactly
2827 * the same.
2828 */
2829 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
2830 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
2831 continue;
2832
2833 for (j = 0; j < sband->n_bitrates; j++) {
2834 struct ieee80211_rate *br;
2835 int brate;
2836
2837 br = &sband->bitrates[j];
2838
2839 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2840 if (brate == rate) {
2841 *rates |= BIT(j);
2842 if (is_basic)
2843 *basic_rates |= BIT(j);
2844 if ((rate * 5) < *min_rate) {
2845 *min_rate = rate * 5;
2846 *min_rate_index = j;
2847 }
2848 break;
2849 }
2850 }
2851 }
2852 }
2853
2854 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2855 struct cfg80211_bss *cbss,
2856 struct ieee80211_mgmt *mgmt, size_t len)
2857 {
2858 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2859 struct ieee80211_local *local = sdata->local;
2860 struct ieee80211_supported_band *sband;
2861 struct sta_info *sta;
2862 u8 *pos;
2863 u16 capab_info, aid;
2864 struct ieee802_11_elems elems;
2865 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2866 const struct cfg80211_bss_ies *bss_ies = NULL;
2867 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2868 u32 changed = 0;
2869 int err;
2870 bool ret;
2871
2872 /* AssocResp and ReassocResp have identical structure */
2873
2874 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2875 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2876
2877 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2878 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2879 aid);
2880 aid &= ~(BIT(15) | BIT(14));
2881
2882 ifmgd->broken_ap = false;
2883
2884 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2885 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2886 aid);
2887 aid = 0;
2888 ifmgd->broken_ap = true;
2889 }
2890
2891 pos = mgmt->u.assoc_resp.variable;
2892 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2893
2894 if (!elems.supp_rates) {
2895 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2896 return false;
2897 }
2898
2899 ifmgd->aid = aid;
2900 ifmgd->tdls_chan_switch_prohibited =
2901 elems.ext_capab && elems.ext_capab_len >= 5 &&
2902 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2903
2904 /*
2905 * Some APs are erroneously not including some information in their
2906 * (re)association response frames. Try to recover by using the data
2907 * from the beacon or probe response. This seems to afflict mobile
2908 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2909 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2910 */
2911 if ((assoc_data->wmm && !elems.wmm_param) ||
2912 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2913 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2914 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2915 (!elems.vht_cap_elem || !elems.vht_operation))) {
2916 const struct cfg80211_bss_ies *ies;
2917 struct ieee802_11_elems bss_elems;
2918
2919 rcu_read_lock();
2920 ies = rcu_dereference(cbss->ies);
2921 if (ies)
2922 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2923 GFP_ATOMIC);
2924 rcu_read_unlock();
2925 if (!bss_ies)
2926 return false;
2927
2928 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2929 false, &bss_elems);
2930 if (assoc_data->wmm &&
2931 !elems.wmm_param && bss_elems.wmm_param) {
2932 elems.wmm_param = bss_elems.wmm_param;
2933 sdata_info(sdata,
2934 "AP bug: WMM param missing from AssocResp\n");
2935 }
2936
2937 /*
2938 * Also check if we requested HT/VHT, otherwise the AP doesn't
2939 * have to include the IEs in the (re)association response.
2940 */
2941 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2942 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2943 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2944 sdata_info(sdata,
2945 "AP bug: HT capability missing from AssocResp\n");
2946 }
2947 if (!elems.ht_operation && bss_elems.ht_operation &&
2948 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2949 elems.ht_operation = bss_elems.ht_operation;
2950 sdata_info(sdata,
2951 "AP bug: HT operation missing from AssocResp\n");
2952 }
2953 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2954 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2955 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2956 sdata_info(sdata,
2957 "AP bug: VHT capa missing from AssocResp\n");
2958 }
2959 if (!elems.vht_operation && bss_elems.vht_operation &&
2960 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2961 elems.vht_operation = bss_elems.vht_operation;
2962 sdata_info(sdata,
2963 "AP bug: VHT operation missing from AssocResp\n");
2964 }
2965 }
2966
2967 /*
2968 * We previously checked these in the beacon/probe response, so
2969 * they should be present here. This is just a safety net.
2970 */
2971 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2972 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2973 sdata_info(sdata,
2974 "HT AP is missing WMM params or HT capability/operation\n");
2975 ret = false;
2976 goto out;
2977 }
2978
2979 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2980 (!elems.vht_cap_elem || !elems.vht_operation)) {
2981 sdata_info(sdata,
2982 "VHT AP is missing VHT capability/operation\n");
2983 ret = false;
2984 goto out;
2985 }
2986
2987 mutex_lock(&sdata->local->sta_mtx);
2988 /*
2989 * station info was already allocated and inserted before
2990 * the association and should be available to us
2991 */
2992 sta = sta_info_get(sdata, cbss->bssid);
2993 if (WARN_ON(!sta)) {
2994 mutex_unlock(&sdata->local->sta_mtx);
2995 ret = false;
2996 goto out;
2997 }
2998
2999 sband = ieee80211_get_sband(sdata);
3000 if (!sband) {
3001 mutex_unlock(&sdata->local->sta_mtx);
3002 ret = false;
3003 goto out;
3004 }
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 if (elems.max_idle_period_ie) {
3089 bss_conf->max_idle_period =
3090 le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
3091 bss_conf->protected_keep_alive =
3092 !!(elems.max_idle_period_ie->idle_options &
3093 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3094 changed |= BSS_CHANGED_KEEP_ALIVE;
3095 } else {
3096 bss_conf->max_idle_period = 0;
3097 bss_conf->protected_keep_alive = false;
3098 }
3099
3100 /* set AID and assoc capability,
3101 * ieee80211_set_associated() will tell the driver */
3102 bss_conf->aid = aid;
3103 bss_conf->assoc_capability = capab_info;
3104 ieee80211_set_associated(sdata, cbss, changed);
3105
3106 /*
3107 * If we're using 4-addr mode, let the AP know that we're
3108 * doing so, so that it can create the STA VLAN on its side
3109 */
3110 if (ifmgd->use_4addr)
3111 ieee80211_send_4addr_nullfunc(local, sdata);
3112
3113 /*
3114 * Start timer to probe the connection to the AP now.
3115 * Also start the timer that will detect beacon loss.
3116 */
3117 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3118 ieee80211_sta_reset_beacon_monitor(sdata);
3119
3120 ret = true;
3121 out:
3122 kfree(bss_ies);
3123 return ret;
3124 }
3125
3126 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3127 struct ieee80211_mgmt *mgmt,
3128 size_t len)
3129 {
3130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3131 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3132 u16 capab_info, status_code, aid;
3133 struct ieee802_11_elems elems;
3134 int ac, uapsd_queues = -1;
3135 u8 *pos;
3136 bool reassoc;
3137 struct cfg80211_bss *bss;
3138 struct ieee80211_event event = {
3139 .type = MLME_EVENT,
3140 .u.mlme.data = ASSOC_EVENT,
3141 };
3142
3143 sdata_assert_lock(sdata);
3144
3145 if (!assoc_data)
3146 return;
3147 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3148 return;
3149
3150 /*
3151 * AssocResp and ReassocResp have identical structure, so process both
3152 * of them in this function.
3153 */
3154
3155 if (len < 24 + 6)
3156 return;
3157
3158 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
3159 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3160 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3161 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3162
3163 sdata_info(sdata,
3164 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3165 reassoc ? "Rea" : "A", mgmt->sa,
3166 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3167
3168 if (assoc_data->fils_kek_len &&
3169 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3170 return;
3171
3172 pos = mgmt->u.assoc_resp.variable;
3173 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3174
3175 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3176 elems.timeout_int &&
3177 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3178 u32 tu, ms;
3179 tu = le32_to_cpu(elems.timeout_int->value);
3180 ms = tu * 1024 / 1000;
3181 sdata_info(sdata,
3182 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3183 mgmt->sa, tu, ms);
3184 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3185 assoc_data->timeout_started = true;
3186 if (ms > IEEE80211_ASSOC_TIMEOUT)
3187 run_again(sdata, assoc_data->timeout);
3188 return;
3189 }
3190
3191 bss = assoc_data->bss;
3192
3193 if (status_code != WLAN_STATUS_SUCCESS) {
3194 sdata_info(sdata, "%pM denied association (code=%d)\n",
3195 mgmt->sa, status_code);
3196 ieee80211_destroy_assoc_data(sdata, false, false);
3197 event.u.mlme.status = MLME_DENIED;
3198 event.u.mlme.reason = status_code;
3199 drv_event_callback(sdata->local, sdata, &event);
3200 } else {
3201 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3202 /* oops -- internal error -- send timeout for now */
3203 ieee80211_destroy_assoc_data(sdata, false, false);
3204 cfg80211_assoc_timeout(sdata->dev, bss);
3205 return;
3206 }
3207 event.u.mlme.status = MLME_SUCCESS;
3208 drv_event_callback(sdata->local, sdata, &event);
3209 sdata_info(sdata, "associated\n");
3210
3211 /*
3212 * destroy assoc_data afterwards, as otherwise an idle
3213 * recalc after assoc_data is NULL but before associated
3214 * is set can cause the interface to go idle
3215 */
3216 ieee80211_destroy_assoc_data(sdata, true, false);
3217
3218 /* get uapsd queues configuration */
3219 uapsd_queues = 0;
3220 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3221 if (sdata->tx_conf[ac].uapsd)
3222 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3223 }
3224
3225 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3226 }
3227
3228 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3229 struct ieee80211_mgmt *mgmt, size_t len,
3230 struct ieee80211_rx_status *rx_status,
3231 struct ieee802_11_elems *elems)
3232 {
3233 struct ieee80211_local *local = sdata->local;
3234 struct ieee80211_bss *bss;
3235 struct ieee80211_channel *channel;
3236
3237 sdata_assert_lock(sdata);
3238
3239 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3240 if (!channel)
3241 return;
3242
3243 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3244 channel);
3245 if (bss) {
3246 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3247 ieee80211_rx_bss_put(local, bss);
3248 }
3249 }
3250
3251
3252 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3253 struct sk_buff *skb)
3254 {
3255 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3256 struct ieee80211_if_managed *ifmgd;
3257 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3258 size_t baselen, len = skb->len;
3259 struct ieee802_11_elems elems;
3260
3261 ifmgd = &sdata->u.mgd;
3262
3263 sdata_assert_lock(sdata);
3264
3265 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3266 return; /* ignore ProbeResp to foreign address */
3267
3268 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3269 if (baselen > len)
3270 return;
3271
3272 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3273 false, &elems);
3274
3275 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3276
3277 if (ifmgd->associated &&
3278 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3279 ieee80211_reset_ap_probe(sdata);
3280 }
3281
3282 /*
3283 * This is the canonical list of information elements we care about,
3284 * the filter code also gives us all changes to the Microsoft OUI
3285 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3286 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3287 * changes to requested client power.
3288 *
3289 * We implement beacon filtering in software since that means we can
3290 * avoid processing the frame here and in cfg80211, and userspace
3291 * will not be able to tell whether the hardware supports it or not.
3292 *
3293 * XXX: This list needs to be dynamic -- userspace needs to be able to
3294 * add items it requires. It also needs to be able to tell us to
3295 * look out for other vendor IEs.
3296 */
3297 static const u64 care_about_ies =
3298 (1ULL << WLAN_EID_COUNTRY) |
3299 (1ULL << WLAN_EID_ERP_INFO) |
3300 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3301 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3302 (1ULL << WLAN_EID_HT_CAPABILITY) |
3303 (1ULL << WLAN_EID_HT_OPERATION) |
3304 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3305
3306 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3307 struct ieee80211_mgmt *mgmt, size_t len,
3308 struct ieee80211_rx_status *rx_status)
3309 {
3310 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3311 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3312 size_t baselen;
3313 struct ieee802_11_elems elems;
3314 struct ieee80211_local *local = sdata->local;
3315 struct ieee80211_chanctx_conf *chanctx_conf;
3316 struct ieee80211_channel *chan;
3317 struct sta_info *sta;
3318 u32 changed = 0;
3319 bool erp_valid;
3320 u8 erp_value = 0;
3321 u32 ncrc;
3322 u8 *bssid;
3323 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3324
3325 sdata_assert_lock(sdata);
3326
3327 /* Process beacon from the current BSS */
3328 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3329 if (baselen > len)
3330 return;
3331
3332 rcu_read_lock();
3333 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3334 if (!chanctx_conf) {
3335 rcu_read_unlock();
3336 return;
3337 }
3338
3339 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3340 rcu_read_unlock();
3341 return;
3342 }
3343 chan = chanctx_conf->def.chan;
3344 rcu_read_unlock();
3345
3346 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3347 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3348 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3349 len - baselen, false, &elems);
3350
3351 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3352 if (elems.tim && !elems.parse_error) {
3353 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3354 ifmgd->dtim_period = tim_ie->dtim_period;
3355 }
3356 ifmgd->have_beacon = true;
3357 ifmgd->assoc_data->need_beacon = false;
3358 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3359 sdata->vif.bss_conf.sync_tsf =
3360 le64_to_cpu(mgmt->u.beacon.timestamp);
3361 sdata->vif.bss_conf.sync_device_ts =
3362 rx_status->device_timestamp;
3363 if (elems.tim)
3364 sdata->vif.bss_conf.sync_dtim_count =
3365 elems.tim->dtim_count;
3366 else
3367 sdata->vif.bss_conf.sync_dtim_count = 0;
3368 }
3369 /* continue assoc process */
3370 ifmgd->assoc_data->timeout = jiffies;
3371 ifmgd->assoc_data->timeout_started = true;
3372 run_again(sdata, ifmgd->assoc_data->timeout);
3373 return;
3374 }
3375
3376 if (!ifmgd->associated ||
3377 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3378 return;
3379 bssid = ifmgd->associated->bssid;
3380
3381 /* Track average RSSI from the Beacon frames of the current AP */
3382 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3383 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3384 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3385 ifmgd->last_cqm_event_signal = 0;
3386 ifmgd->count_beacon_signal = 1;
3387 ifmgd->last_ave_beacon_signal = 0;
3388 } else {
3389 ifmgd->count_beacon_signal++;
3390 }
3391
3392 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3393
3394 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3395 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3396 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3397 int last_sig = ifmgd->last_ave_beacon_signal;
3398 struct ieee80211_event event = {
3399 .type = RSSI_EVENT,
3400 };
3401
3402 /*
3403 * if signal crosses either of the boundaries, invoke callback
3404 * with appropriate parameters
3405 */
3406 if (sig > ifmgd->rssi_max_thold &&
3407 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3408 ifmgd->last_ave_beacon_signal = sig;
3409 event.u.rssi.data = RSSI_EVENT_HIGH;
3410 drv_event_callback(local, sdata, &event);
3411 } else if (sig < ifmgd->rssi_min_thold &&
3412 (last_sig >= ifmgd->rssi_max_thold ||
3413 last_sig == 0)) {
3414 ifmgd->last_ave_beacon_signal = sig;
3415 event.u.rssi.data = RSSI_EVENT_LOW;
3416 drv_event_callback(local, sdata, &event);
3417 }
3418 }
3419
3420 if (bss_conf->cqm_rssi_thold &&
3421 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3422 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3423 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3424 int last_event = ifmgd->last_cqm_event_signal;
3425 int thold = bss_conf->cqm_rssi_thold;
3426 int hyst = bss_conf->cqm_rssi_hyst;
3427
3428 if (sig < thold &&
3429 (last_event == 0 || sig < last_event - hyst)) {
3430 ifmgd->last_cqm_event_signal = sig;
3431 ieee80211_cqm_rssi_notify(
3432 &sdata->vif,
3433 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3434 sig, GFP_KERNEL);
3435 } else if (sig > thold &&
3436 (last_event == 0 || sig > last_event + hyst)) {
3437 ifmgd->last_cqm_event_signal = sig;
3438 ieee80211_cqm_rssi_notify(
3439 &sdata->vif,
3440 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3441 sig, GFP_KERNEL);
3442 }
3443 }
3444
3445 if (bss_conf->cqm_rssi_low &&
3446 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3447 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3448 int last_event = ifmgd->last_cqm_event_signal;
3449 int low = bss_conf->cqm_rssi_low;
3450 int high = bss_conf->cqm_rssi_high;
3451
3452 if (sig < low &&
3453 (last_event == 0 || last_event >= low)) {
3454 ifmgd->last_cqm_event_signal = sig;
3455 ieee80211_cqm_rssi_notify(
3456 &sdata->vif,
3457 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3458 sig, GFP_KERNEL);
3459 } else if (sig > high &&
3460 (last_event == 0 || last_event <= high)) {
3461 ifmgd->last_cqm_event_signal = sig;
3462 ieee80211_cqm_rssi_notify(
3463 &sdata->vif,
3464 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3465 sig, GFP_KERNEL);
3466 }
3467 }
3468
3469 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3470 mlme_dbg_ratelimited(sdata,
3471 "cancelling AP probe due to a received beacon\n");
3472 ieee80211_reset_ap_probe(sdata);
3473 }
3474
3475 /*
3476 * Push the beacon loss detection into the future since
3477 * we are processing a beacon from the AP just now.
3478 */
3479 ieee80211_sta_reset_beacon_monitor(sdata);
3480
3481 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3482 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3483 len - baselen, false, &elems,
3484 care_about_ies, ncrc);
3485
3486 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3487 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3488 if (local->hw.conf.dynamic_ps_timeout > 0) {
3489 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3490 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3491 ieee80211_hw_config(local,
3492 IEEE80211_CONF_CHANGE_PS);
3493 }
3494 ieee80211_send_nullfunc(local, sdata, false);
3495 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3496 local->pspolling = true;
3497
3498 /*
3499 * Here is assumed that the driver will be
3500 * able to send ps-poll frame and receive a
3501 * response even though power save mode is
3502 * enabled, but some drivers might require
3503 * to disable power save here. This needs
3504 * to be investigated.
3505 */
3506 ieee80211_send_pspoll(local, sdata);
3507 }
3508 }
3509
3510 if (sdata->vif.p2p ||
3511 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3512 struct ieee80211_p2p_noa_attr noa = {};
3513 int ret;
3514
3515 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3516 len - baselen,
3517 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3518 (u8 *) &noa, sizeof(noa));
3519 if (ret >= 2) {
3520 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3521 /* valid noa_attr and index changed */
3522 sdata->u.mgd.p2p_noa_index = noa.index;
3523 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3524 changed |= BSS_CHANGED_P2P_PS;
3525 /*
3526 * make sure we update all information, the CRC
3527 * mechanism doesn't look at P2P attributes.
3528 */
3529 ifmgd->beacon_crc_valid = false;
3530 }
3531 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3532 /* noa_attr not found and we had valid noa_attr before */
3533 sdata->u.mgd.p2p_noa_index = -1;
3534 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3535 changed |= BSS_CHANGED_P2P_PS;
3536 ifmgd->beacon_crc_valid = false;
3537 }
3538 }
3539
3540 if (ifmgd->csa_waiting_bcn)
3541 ieee80211_chswitch_post_beacon(sdata);
3542
3543 /*
3544 * Update beacon timing and dtim count on every beacon appearance. This
3545 * will allow the driver to use the most updated values. Do it before
3546 * comparing this one with last received beacon.
3547 * IMPORTANT: These parameters would possibly be out of sync by the time
3548 * the driver will use them. The synchronized view is currently
3549 * guaranteed only in certain callbacks.
3550 */
3551 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3552 sdata->vif.bss_conf.sync_tsf =
3553 le64_to_cpu(mgmt->u.beacon.timestamp);
3554 sdata->vif.bss_conf.sync_device_ts =
3555 rx_status->device_timestamp;
3556 if (elems.tim)
3557 sdata->vif.bss_conf.sync_dtim_count =
3558 elems.tim->dtim_count;
3559 else
3560 sdata->vif.bss_conf.sync_dtim_count = 0;
3561 }
3562
3563 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3564 return;
3565 ifmgd->beacon_crc = ncrc;
3566 ifmgd->beacon_crc_valid = true;
3567
3568 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3569
3570 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3571 rx_status->device_timestamp,
3572 &elems, true);
3573
3574 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3575 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3576 elems.wmm_param_len))
3577 changed |= BSS_CHANGED_QOS;
3578
3579 /*
3580 * If we haven't had a beacon before, tell the driver about the
3581 * DTIM period (and beacon timing if desired) now.
3582 */
3583 if (!ifmgd->have_beacon) {
3584 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3585 if (elems.tim)
3586 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3587 else
3588 bss_conf->dtim_period = 1;
3589
3590 changed |= BSS_CHANGED_BEACON_INFO;
3591 ifmgd->have_beacon = true;
3592
3593 mutex_lock(&local->iflist_mtx);
3594 ieee80211_recalc_ps(local);
3595 mutex_unlock(&local->iflist_mtx);
3596
3597 ieee80211_recalc_ps_vif(sdata);
3598 }
3599
3600 if (elems.erp_info) {
3601 erp_valid = true;
3602 erp_value = elems.erp_info[0];
3603 } else {
3604 erp_valid = false;
3605 }
3606 changed |= ieee80211_handle_bss_capability(sdata,
3607 le16_to_cpu(mgmt->u.beacon.capab_info),
3608 erp_valid, erp_value);
3609
3610 mutex_lock(&local->sta_mtx);
3611 sta = sta_info_get(sdata, bssid);
3612
3613 if (ieee80211_config_bw(sdata, sta,
3614 elems.ht_cap_elem, elems.ht_operation,
3615 elems.vht_operation, bssid, &changed)) {
3616 mutex_unlock(&local->sta_mtx);
3617 sdata_info(sdata,
3618 "failed to follow AP %pM bandwidth change, disconnect\n",
3619 bssid);
3620 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3621 WLAN_REASON_DEAUTH_LEAVING,
3622 true, deauth_buf);
3623 ieee80211_report_disconnect(sdata, deauth_buf,
3624 sizeof(deauth_buf), true,
3625 WLAN_REASON_DEAUTH_LEAVING);
3626 return;
3627 }
3628
3629 if (sta && elems.opmode_notif)
3630 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3631 rx_status->band);
3632 mutex_unlock(&local->sta_mtx);
3633
3634 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3635 elems.country_elem,
3636 elems.country_elem_len,
3637 elems.pwr_constr_elem,
3638 elems.cisco_dtpc_elem);
3639
3640 ieee80211_bss_info_change_notify(sdata, changed);
3641 }
3642
3643 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3644 struct sk_buff *skb)
3645 {
3646 struct ieee80211_rx_status *rx_status;
3647 struct ieee80211_mgmt *mgmt;
3648 u16 fc;
3649 struct ieee802_11_elems elems;
3650 int ies_len;
3651
3652 rx_status = (struct ieee80211_rx_status *) skb->cb;
3653 mgmt = (struct ieee80211_mgmt *) skb->data;
3654 fc = le16_to_cpu(mgmt->frame_control);
3655
3656 sdata_lock(sdata);
3657
3658 switch (fc & IEEE80211_FCTL_STYPE) {
3659 case IEEE80211_STYPE_BEACON:
3660 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3661 break;
3662 case IEEE80211_STYPE_PROBE_RESP:
3663 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3664 break;
3665 case IEEE80211_STYPE_AUTH:
3666 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3667 break;
3668 case IEEE80211_STYPE_DEAUTH:
3669 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3670 break;
3671 case IEEE80211_STYPE_DISASSOC:
3672 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3673 break;
3674 case IEEE80211_STYPE_ASSOC_RESP:
3675 case IEEE80211_STYPE_REASSOC_RESP:
3676 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3677 break;
3678 case IEEE80211_STYPE_ACTION:
3679 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3680 ies_len = skb->len -
3681 offsetof(struct ieee80211_mgmt,
3682 u.action.u.chan_switch.variable);
3683
3684 if (ies_len < 0)
3685 break;
3686
3687 ieee802_11_parse_elems(
3688 mgmt->u.action.u.chan_switch.variable,
3689 ies_len, true, &elems);
3690
3691 if (elems.parse_error)
3692 break;
3693
3694 ieee80211_sta_process_chanswitch(sdata,
3695 rx_status->mactime,
3696 rx_status->device_timestamp,
3697 &elems, false);
3698 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3699 ies_len = skb->len -
3700 offsetof(struct ieee80211_mgmt,
3701 u.action.u.ext_chan_switch.variable);
3702
3703 if (ies_len < 0)
3704 break;
3705
3706 ieee802_11_parse_elems(
3707 mgmt->u.action.u.ext_chan_switch.variable,
3708 ies_len, true, &elems);
3709
3710 if (elems.parse_error)
3711 break;
3712
3713 /* for the handling code pretend this was also an IE */
3714 elems.ext_chansw_ie =
3715 &mgmt->u.action.u.ext_chan_switch.data;
3716
3717 ieee80211_sta_process_chanswitch(sdata,
3718 rx_status->mactime,
3719 rx_status->device_timestamp,
3720 &elems, false);
3721 }
3722 break;
3723 }
3724 sdata_unlock(sdata);
3725 }
3726
3727 static void ieee80211_sta_timer(unsigned long data)
3728 {
3729 struct ieee80211_sub_if_data *sdata =
3730 (struct ieee80211_sub_if_data *) data;
3731
3732 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3733 }
3734
3735 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3736 u8 *bssid, u8 reason, bool tx)
3737 {
3738 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3739
3740 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3741 tx, frame_buf);
3742
3743 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3744 reason);
3745 }
3746
3747 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3748 {
3749 struct ieee80211_local *local = sdata->local;
3750 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3751 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3752 u32 tx_flags = 0;
3753 u16 trans = 1;
3754 u16 status = 0;
3755
3756 sdata_assert_lock(sdata);
3757
3758 if (WARN_ON_ONCE(!auth_data))
3759 return -EINVAL;
3760
3761 auth_data->tries++;
3762
3763 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3764 sdata_info(sdata, "authentication with %pM timed out\n",
3765 auth_data->bss->bssid);
3766
3767 /*
3768 * Most likely AP is not in the range so remove the
3769 * bss struct for that AP.
3770 */
3771 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3772
3773 return -ETIMEDOUT;
3774 }
3775
3776 drv_mgd_prepare_tx(local, sdata);
3777
3778 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3779 auth_data->bss->bssid, auth_data->tries,
3780 IEEE80211_AUTH_MAX_TRIES);
3781
3782 auth_data->expected_transaction = 2;
3783
3784 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3785 trans = auth_data->sae_trans;
3786 status = auth_data->sae_status;
3787 auth_data->expected_transaction = trans;
3788 }
3789
3790 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3791 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3792 IEEE80211_TX_INTFL_MLME_CONN_TX;
3793
3794 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3795 auth_data->data, auth_data->data_len,
3796 auth_data->bss->bssid,
3797 auth_data->bss->bssid, NULL, 0, 0,
3798 tx_flags);
3799
3800 if (tx_flags == 0) {
3801 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3802 auth_data->timeout_started = true;
3803 run_again(sdata, auth_data->timeout);
3804 } else {
3805 auth_data->timeout =
3806 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3807 auth_data->timeout_started = true;
3808 run_again(sdata, auth_data->timeout);
3809 }
3810
3811 return 0;
3812 }
3813
3814 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3815 {
3816 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3817 struct ieee80211_local *local = sdata->local;
3818
3819 sdata_assert_lock(sdata);
3820
3821 assoc_data->tries++;
3822 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3823 sdata_info(sdata, "association with %pM timed out\n",
3824 assoc_data->bss->bssid);
3825
3826 /*
3827 * Most likely AP is not in the range so remove the
3828 * bss struct for that AP.
3829 */
3830 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3831
3832 return -ETIMEDOUT;
3833 }
3834
3835 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3836 assoc_data->bss->bssid, assoc_data->tries,
3837 IEEE80211_ASSOC_MAX_TRIES);
3838 ieee80211_send_assoc(sdata);
3839
3840 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3841 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3842 assoc_data->timeout_started = true;
3843 run_again(sdata, assoc_data->timeout);
3844 } else {
3845 assoc_data->timeout =
3846 round_jiffies_up(jiffies +
3847 IEEE80211_ASSOC_TIMEOUT_LONG);
3848 assoc_data->timeout_started = true;
3849 run_again(sdata, assoc_data->timeout);
3850 }
3851
3852 return 0;
3853 }
3854
3855 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3856 __le16 fc, bool acked)
3857 {
3858 struct ieee80211_local *local = sdata->local;
3859
3860 sdata->u.mgd.status_fc = fc;
3861 sdata->u.mgd.status_acked = acked;
3862 sdata->u.mgd.status_received = true;
3863
3864 ieee80211_queue_work(&local->hw, &sdata->work);
3865 }
3866
3867 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3868 {
3869 struct ieee80211_local *local = sdata->local;
3870 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3871
3872 sdata_lock(sdata);
3873
3874 if (ifmgd->status_received) {
3875 __le16 fc = ifmgd->status_fc;
3876 bool status_acked = ifmgd->status_acked;
3877
3878 ifmgd->status_received = false;
3879 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3880 if (status_acked) {
3881 ifmgd->auth_data->timeout =
3882 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3883 run_again(sdata, ifmgd->auth_data->timeout);
3884 } else {
3885 ifmgd->auth_data->timeout = jiffies - 1;
3886 }
3887 ifmgd->auth_data->timeout_started = true;
3888 } else if (ifmgd->assoc_data &&
3889 (ieee80211_is_assoc_req(fc) ||
3890 ieee80211_is_reassoc_req(fc))) {
3891 if (status_acked) {
3892 ifmgd->assoc_data->timeout =
3893 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3894 run_again(sdata, ifmgd->assoc_data->timeout);
3895 } else {
3896 ifmgd->assoc_data->timeout = jiffies - 1;
3897 }
3898 ifmgd->assoc_data->timeout_started = true;
3899 }
3900 }
3901
3902 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3903 time_after(jiffies, ifmgd->auth_data->timeout)) {
3904 if (ifmgd->auth_data->done) {
3905 /*
3906 * ok ... we waited for assoc but userspace didn't,
3907 * so let's just kill the auth data
3908 */
3909 ieee80211_destroy_auth_data(sdata, false);
3910 } else if (ieee80211_auth(sdata)) {
3911 u8 bssid[ETH_ALEN];
3912 struct ieee80211_event event = {
3913 .type = MLME_EVENT,
3914 .u.mlme.data = AUTH_EVENT,
3915 .u.mlme.status = MLME_TIMEOUT,
3916 };
3917
3918 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3919
3920 ieee80211_destroy_auth_data(sdata, false);
3921
3922 cfg80211_auth_timeout(sdata->dev, bssid);
3923 drv_event_callback(sdata->local, sdata, &event);
3924 }
3925 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3926 run_again(sdata, ifmgd->auth_data->timeout);
3927
3928 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3929 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3930 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3931 ieee80211_do_assoc(sdata)) {
3932 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3933 struct ieee80211_event event = {
3934 .type = MLME_EVENT,
3935 .u.mlme.data = ASSOC_EVENT,
3936 .u.mlme.status = MLME_TIMEOUT,
3937 };
3938
3939 ieee80211_destroy_assoc_data(sdata, false, false);
3940 cfg80211_assoc_timeout(sdata->dev, bss);
3941 drv_event_callback(sdata->local, sdata, &event);
3942 }
3943 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3944 run_again(sdata, ifmgd->assoc_data->timeout);
3945
3946 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3947 ifmgd->associated) {
3948 u8 bssid[ETH_ALEN];
3949 int max_tries;
3950
3951 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3952
3953 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3954 max_tries = max_nullfunc_tries;
3955 else
3956 max_tries = max_probe_tries;
3957
3958 /* ACK received for nullfunc probing frame */
3959 if (!ifmgd->probe_send_count)
3960 ieee80211_reset_ap_probe(sdata);
3961 else if (ifmgd->nullfunc_failed) {
3962 if (ifmgd->probe_send_count < max_tries) {
3963 mlme_dbg(sdata,
3964 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3965 bssid, ifmgd->probe_send_count,
3966 max_tries);
3967 ieee80211_mgd_probe_ap_send(sdata);
3968 } else {
3969 mlme_dbg(sdata,
3970 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3971 bssid);
3972 ieee80211_sta_connection_lost(sdata, bssid,
3973 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3974 false);
3975 }
3976 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3977 run_again(sdata, ifmgd->probe_timeout);
3978 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3979 mlme_dbg(sdata,
3980 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3981 bssid, probe_wait_ms);
3982 ieee80211_sta_connection_lost(sdata, bssid,
3983 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3984 } else if (ifmgd->probe_send_count < max_tries) {
3985 mlme_dbg(sdata,
3986 "No probe response from AP %pM after %dms, try %d/%i\n",
3987 bssid, probe_wait_ms,
3988 ifmgd->probe_send_count, max_tries);
3989 ieee80211_mgd_probe_ap_send(sdata);
3990 } else {
3991 /*
3992 * We actually lost the connection ... or did we?
3993 * Let's make sure!
3994 */
3995 mlme_dbg(sdata,
3996 "No probe response from AP %pM after %dms, disconnecting.\n",
3997 bssid, probe_wait_ms);
3998
3999 ieee80211_sta_connection_lost(sdata, bssid,
4000 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4001 }
4002 }
4003
4004 sdata_unlock(sdata);
4005 }
4006
4007 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
4008 {
4009 struct ieee80211_sub_if_data *sdata =
4010 (struct ieee80211_sub_if_data *) data;
4011 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4012
4013 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4014 return;
4015
4016 sdata->u.mgd.connection_loss = false;
4017 ieee80211_queue_work(&sdata->local->hw,
4018 &sdata->u.mgd.beacon_connection_loss_work);
4019 }
4020
4021 static void ieee80211_sta_conn_mon_timer(unsigned long data)
4022 {
4023 struct ieee80211_sub_if_data *sdata =
4024 (struct ieee80211_sub_if_data *) data;
4025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4026 struct ieee80211_local *local = sdata->local;
4027
4028 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4029 return;
4030
4031 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4032 }
4033
4034 static void ieee80211_sta_monitor_work(struct work_struct *work)
4035 {
4036 struct ieee80211_sub_if_data *sdata =
4037 container_of(work, struct ieee80211_sub_if_data,
4038 u.mgd.monitor_work);
4039
4040 ieee80211_mgd_probe_ap(sdata, false);
4041 }
4042
4043 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4044 {
4045 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4046 __ieee80211_stop_poll(sdata);
4047
4048 /* let's probe the connection once */
4049 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4050 ieee80211_queue_work(&sdata->local->hw,
4051 &sdata->u.mgd.monitor_work);
4052 }
4053 }
4054
4055 #ifdef CONFIG_PM
4056 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4057 {
4058 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4059 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4060
4061 sdata_lock(sdata);
4062
4063 if (ifmgd->auth_data || ifmgd->assoc_data) {
4064 const u8 *bssid = ifmgd->auth_data ?
4065 ifmgd->auth_data->bss->bssid :
4066 ifmgd->assoc_data->bss->bssid;
4067
4068 /*
4069 * If we are trying to authenticate / associate while suspending,
4070 * cfg80211 won't know and won't actually abort those attempts,
4071 * thus we need to do that ourselves.
4072 */
4073 ieee80211_send_deauth_disassoc(sdata, bssid,
4074 IEEE80211_STYPE_DEAUTH,
4075 WLAN_REASON_DEAUTH_LEAVING,
4076 false, frame_buf);
4077 if (ifmgd->assoc_data)
4078 ieee80211_destroy_assoc_data(sdata, false, true);
4079 if (ifmgd->auth_data)
4080 ieee80211_destroy_auth_data(sdata, false);
4081 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4082 IEEE80211_DEAUTH_FRAME_LEN);
4083 }
4084
4085 /* This is a bit of a hack - we should find a better and more generic
4086 * solution to this. Normally when suspending, cfg80211 will in fact
4087 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4088 * auth (not so important) or assoc (this is the problem) process.
4089 *
4090 * As a consequence, it can happen that we are in the process of both
4091 * associating and suspending, and receive an association response
4092 * after cfg80211 has checked if it needs to disconnect, but before
4093 * we actually set the flag to drop incoming frames. This will then
4094 * cause the workqueue flush to process the association response in
4095 * the suspend, resulting in a successful association just before it
4096 * tries to remove the interface from the driver, which now though
4097 * has a channel context assigned ... this results in issues.
4098 *
4099 * To work around this (for now) simply deauth here again if we're
4100 * now connected.
4101 */
4102 if (ifmgd->associated && !sdata->local->wowlan) {
4103 u8 bssid[ETH_ALEN];
4104 struct cfg80211_deauth_request req = {
4105 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4106 .bssid = bssid,
4107 };
4108
4109 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4110 ieee80211_mgd_deauth(sdata, &req);
4111 }
4112
4113 sdata_unlock(sdata);
4114 }
4115
4116 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4117 {
4118 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4119
4120 sdata_lock(sdata);
4121 if (!ifmgd->associated) {
4122 sdata_unlock(sdata);
4123 return;
4124 }
4125
4126 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4127 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4128 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4129 ieee80211_sta_connection_lost(sdata,
4130 ifmgd->associated->bssid,
4131 WLAN_REASON_UNSPECIFIED,
4132 true);
4133 sdata_unlock(sdata);
4134 return;
4135 }
4136 sdata_unlock(sdata);
4137 }
4138 #endif
4139
4140 /* interface setup */
4141 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4142 {
4143 struct ieee80211_if_managed *ifmgd;
4144
4145 ifmgd = &sdata->u.mgd;
4146 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4147 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4148 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4149 ieee80211_beacon_connection_loss_work);
4150 INIT_WORK(&ifmgd->csa_connection_drop_work,
4151 ieee80211_csa_connection_drop_work);
4152 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4153 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4154 ieee80211_tdls_peer_del_work);
4155 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4156 (unsigned long) sdata);
4157 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4158 (unsigned long) sdata);
4159 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4160 (unsigned long) sdata);
4161 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4162 (unsigned long) sdata);
4163 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4164 ieee80211_sta_handle_tspec_ac_params_wk);
4165
4166 ifmgd->flags = 0;
4167 ifmgd->powersave = sdata->wdev.ps;
4168 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4169 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4170 ifmgd->p2p_noa_index = -1;
4171
4172 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4173 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4174 else
4175 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4176
4177 /* Setup TDLS data */
4178 spin_lock_init(&ifmgd->teardown_lock);
4179 ifmgd->teardown_skb = NULL;
4180 ifmgd->orig_teardown_skb = NULL;
4181 }
4182
4183 /* scan finished notification */
4184 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4185 {
4186 struct ieee80211_sub_if_data *sdata;
4187
4188 /* Restart STA timers */
4189 rcu_read_lock();
4190 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4191 if (ieee80211_sdata_running(sdata))
4192 ieee80211_restart_sta_timer(sdata);
4193 }
4194 rcu_read_unlock();
4195 }
4196
4197 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4198 struct cfg80211_bss *cbss)
4199 {
4200 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4201 const u8 *ht_cap_ie, *vht_cap_ie;
4202 const struct ieee80211_ht_cap *ht_cap;
4203 const struct ieee80211_vht_cap *vht_cap;
4204 u8 chains = 1;
4205
4206 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4207 return chains;
4208
4209 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4210 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4211 ht_cap = (void *)(ht_cap_ie + 2);
4212 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4213 /*
4214 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4215 * "Tx Unequal Modulation Supported" fields.
4216 */
4217 }
4218
4219 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4220 return chains;
4221
4222 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4223 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4224 u8 nss;
4225 u16 tx_mcs_map;
4226
4227 vht_cap = (void *)(vht_cap_ie + 2);
4228 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4229 for (nss = 8; nss > 0; nss--) {
4230 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4231 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4232 break;
4233 }
4234 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4235 chains = max(chains, nss);
4236 }
4237
4238 return chains;
4239 }
4240
4241 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4242 struct cfg80211_bss *cbss)
4243 {
4244 struct ieee80211_local *local = sdata->local;
4245 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4246 const struct ieee80211_ht_cap *ht_cap = NULL;
4247 const struct ieee80211_ht_operation *ht_oper = NULL;
4248 const struct ieee80211_vht_operation *vht_oper = NULL;
4249 struct ieee80211_supported_band *sband;
4250 struct cfg80211_chan_def chandef;
4251 int ret;
4252 u32 i;
4253 bool have_80mhz;
4254
4255 sband = local->hw.wiphy->bands[cbss->channel->band];
4256
4257 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4258 IEEE80211_STA_DISABLE_80P80MHZ |
4259 IEEE80211_STA_DISABLE_160MHZ);
4260
4261 rcu_read_lock();
4262
4263 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4264 sband->ht_cap.ht_supported) {
4265 const u8 *ht_oper_ie, *ht_cap_ie;
4266
4267 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4268 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4269 ht_oper = (void *)(ht_oper_ie + 2);
4270
4271 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4272 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4273 ht_cap = (void *)(ht_cap_ie + 2);
4274
4275 if (!ht_cap) {
4276 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4277 ht_oper = NULL;
4278 }
4279 }
4280
4281 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4282 sband->vht_cap.vht_supported) {
4283 const u8 *vht_oper_ie, *vht_cap;
4284
4285 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4286 WLAN_EID_VHT_OPERATION);
4287 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4288 vht_oper = (void *)(vht_oper_ie + 2);
4289 if (vht_oper && !ht_oper) {
4290 vht_oper = NULL;
4291 sdata_info(sdata,
4292 "AP advertised VHT without HT, disabling both\n");
4293 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4294 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4295 }
4296
4297 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4298 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4299 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4300 vht_oper = NULL;
4301 }
4302 }
4303
4304 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4305 have_80mhz = false;
4306 for (i = 0; i < sband->n_channels; i++) {
4307 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4308 IEEE80211_CHAN_NO_80MHZ))
4309 continue;
4310
4311 have_80mhz = true;
4312 break;
4313 }
4314
4315 if (!have_80mhz)
4316 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4317
4318 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4319 cbss->channel,
4320 ht_cap, ht_oper, vht_oper,
4321 &chandef, false);
4322
4323 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4324 local->rx_chains);
4325
4326 rcu_read_unlock();
4327
4328 /* will change later if needed */
4329 sdata->smps_mode = IEEE80211_SMPS_OFF;
4330
4331 mutex_lock(&local->mtx);
4332 /*
4333 * If this fails (possibly due to channel context sharing
4334 * on incompatible channels, e.g. 80+80 and 160 sharing the
4335 * same control channel) try to use a smaller bandwidth.
4336 */
4337 ret = ieee80211_vif_use_channel(sdata, &chandef,
4338 IEEE80211_CHANCTX_SHARED);
4339
4340 /* don't downgrade for 5 and 10 MHz channels, though. */
4341 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4342 chandef.width == NL80211_CHAN_WIDTH_10)
4343 goto out;
4344
4345 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4346 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4347 ret = ieee80211_vif_use_channel(sdata, &chandef,
4348 IEEE80211_CHANCTX_SHARED);
4349 }
4350 out:
4351 mutex_unlock(&local->mtx);
4352 return ret;
4353 }
4354
4355 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4356 struct cfg80211_bss *cbss, bool assoc,
4357 bool override)
4358 {
4359 struct ieee80211_local *local = sdata->local;
4360 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4361 struct ieee80211_bss *bss = (void *)cbss->priv;
4362 struct sta_info *new_sta = NULL;
4363 struct ieee80211_supported_band *sband;
4364 bool have_sta = false;
4365 int err;
4366
4367 sband = local->hw.wiphy->bands[cbss->channel->band];
4368
4369 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4370 return -EINVAL;
4371
4372 /* If a reconfig is happening, bail out */
4373 if (local->in_reconfig)
4374 return -EBUSY;
4375
4376 if (assoc) {
4377 rcu_read_lock();
4378 have_sta = sta_info_get(sdata, cbss->bssid);
4379 rcu_read_unlock();
4380 }
4381
4382 if (!have_sta) {
4383 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4384 if (!new_sta)
4385 return -ENOMEM;
4386 }
4387
4388 /*
4389 * Set up the information for the new channel before setting the
4390 * new channel. We can't - completely race-free - change the basic
4391 * rates bitmap and the channel (sband) that it refers to, but if
4392 * we set it up before we at least avoid calling into the driver's
4393 * bss_info_changed() method with invalid information (since we do
4394 * call that from changing the channel - only for IDLE and perhaps
4395 * some others, but ...).
4396 *
4397 * So to avoid that, just set up all the new information before the
4398 * channel, but tell the driver to apply it only afterwards, since
4399 * it might need the new channel for that.
4400 */
4401 if (new_sta) {
4402 u32 rates = 0, basic_rates = 0;
4403 bool have_higher_than_11mbit;
4404 int min_rate = INT_MAX, min_rate_index = -1;
4405 const struct cfg80211_bss_ies *ies;
4406 int shift = ieee80211_vif_get_shift(&sdata->vif);
4407
4408 ieee80211_get_rates(sband, bss->supp_rates,
4409 bss->supp_rates_len,
4410 &rates, &basic_rates,
4411 &have_higher_than_11mbit,
4412 &min_rate, &min_rate_index,
4413 shift);
4414
4415 /*
4416 * This used to be a workaround for basic rates missing
4417 * in the association response frame. Now that we no
4418 * longer use the basic rates from there, it probably
4419 * doesn't happen any more, but keep the workaround so
4420 * in case some *other* APs are buggy in different ways
4421 * we can connect -- with a warning.
4422 */
4423 if (!basic_rates && min_rate_index >= 0) {
4424 sdata_info(sdata,
4425 "No basic rates, using min rate instead\n");
4426 basic_rates = BIT(min_rate_index);
4427 }
4428
4429 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4430 sdata->vif.bss_conf.basic_rates = basic_rates;
4431
4432 /* cf. IEEE 802.11 9.2.12 */
4433 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4434 have_higher_than_11mbit)
4435 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4436 else
4437 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4438
4439 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4440
4441 /* set timing information */
4442 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4443 rcu_read_lock();
4444 ies = rcu_dereference(cbss->beacon_ies);
4445 if (ies) {
4446 const u8 *tim_ie;
4447
4448 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4449 sdata->vif.bss_conf.sync_device_ts =
4450 bss->device_ts_beacon;
4451 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4452 ies->data, ies->len);
4453 if (tim_ie && tim_ie[1] >= 2)
4454 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4455 else
4456 sdata->vif.bss_conf.sync_dtim_count = 0;
4457 } else if (!ieee80211_hw_check(&sdata->local->hw,
4458 TIMING_BEACON_ONLY)) {
4459 ies = rcu_dereference(cbss->proberesp_ies);
4460 /* must be non-NULL since beacon IEs were NULL */
4461 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4462 sdata->vif.bss_conf.sync_device_ts =
4463 bss->device_ts_presp;
4464 sdata->vif.bss_conf.sync_dtim_count = 0;
4465 } else {
4466 sdata->vif.bss_conf.sync_tsf = 0;
4467 sdata->vif.bss_conf.sync_device_ts = 0;
4468 sdata->vif.bss_conf.sync_dtim_count = 0;
4469 }
4470 rcu_read_unlock();
4471 }
4472
4473 if (new_sta || override) {
4474 err = ieee80211_prep_channel(sdata, cbss);
4475 if (err) {
4476 if (new_sta)
4477 sta_info_free(local, new_sta);
4478 return -EINVAL;
4479 }
4480 }
4481
4482 if (new_sta) {
4483 /*
4484 * tell driver about BSSID, basic rates and timing
4485 * this was set up above, before setting the channel
4486 */
4487 ieee80211_bss_info_change_notify(sdata,
4488 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4489 BSS_CHANGED_BEACON_INT);
4490
4491 if (assoc)
4492 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4493
4494 err = sta_info_insert(new_sta);
4495 new_sta = NULL;
4496 if (err) {
4497 sdata_info(sdata,
4498 "failed to insert STA entry for the AP (error %d)\n",
4499 err);
4500 return err;
4501 }
4502 } else
4503 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4504
4505 /* Cancel scan to ensure that nothing interferes with connection */
4506 if (local->scanning)
4507 ieee80211_scan_cancel(local);
4508
4509 return 0;
4510 }
4511
4512 /* config hooks */
4513 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4514 struct cfg80211_auth_request *req)
4515 {
4516 struct ieee80211_local *local = sdata->local;
4517 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4518 struct ieee80211_mgd_auth_data *auth_data;
4519 u16 auth_alg;
4520 int err;
4521
4522 /* prepare auth data structure */
4523
4524 switch (req->auth_type) {
4525 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4526 auth_alg = WLAN_AUTH_OPEN;
4527 break;
4528 case NL80211_AUTHTYPE_SHARED_KEY:
4529 if (IS_ERR(local->wep_tx_tfm))
4530 return -EOPNOTSUPP;
4531 auth_alg = WLAN_AUTH_SHARED_KEY;
4532 break;
4533 case NL80211_AUTHTYPE_FT:
4534 auth_alg = WLAN_AUTH_FT;
4535 break;
4536 case NL80211_AUTHTYPE_NETWORK_EAP:
4537 auth_alg = WLAN_AUTH_LEAP;
4538 break;
4539 case NL80211_AUTHTYPE_SAE:
4540 auth_alg = WLAN_AUTH_SAE;
4541 break;
4542 case NL80211_AUTHTYPE_FILS_SK:
4543 auth_alg = WLAN_AUTH_FILS_SK;
4544 break;
4545 case NL80211_AUTHTYPE_FILS_SK_PFS:
4546 auth_alg = WLAN_AUTH_FILS_SK_PFS;
4547 break;
4548 case NL80211_AUTHTYPE_FILS_PK:
4549 auth_alg = WLAN_AUTH_FILS_PK;
4550 break;
4551 default:
4552 return -EOPNOTSUPP;
4553 }
4554
4555 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
4556 req->ie_len, GFP_KERNEL);
4557 if (!auth_data)
4558 return -ENOMEM;
4559
4560 auth_data->bss = req->bss;
4561
4562 if (req->auth_data_len >= 4) {
4563 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
4564 __le16 *pos = (__le16 *) req->auth_data;
4565
4566 auth_data->sae_trans = le16_to_cpu(pos[0]);
4567 auth_data->sae_status = le16_to_cpu(pos[1]);
4568 }
4569 memcpy(auth_data->data, req->auth_data + 4,
4570 req->auth_data_len - 4);
4571 auth_data->data_len += req->auth_data_len - 4;
4572 }
4573
4574 if (req->ie && req->ie_len) {
4575 memcpy(&auth_data->data[auth_data->data_len],
4576 req->ie, req->ie_len);
4577 auth_data->data_len += req->ie_len;
4578 }
4579
4580 if (req->key && req->key_len) {
4581 auth_data->key_len = req->key_len;
4582 auth_data->key_idx = req->key_idx;
4583 memcpy(auth_data->key, req->key, req->key_len);
4584 }
4585
4586 auth_data->algorithm = auth_alg;
4587
4588 /* try to authenticate/probe */
4589
4590 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4591 ifmgd->assoc_data) {
4592 err = -EBUSY;
4593 goto err_free;
4594 }
4595
4596 if (ifmgd->auth_data)
4597 ieee80211_destroy_auth_data(sdata, false);
4598
4599 /* prep auth_data so we don't go into idle on disassoc */
4600 ifmgd->auth_data = auth_data;
4601
4602 if (ifmgd->associated) {
4603 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4604
4605 sdata_info(sdata,
4606 "disconnect from AP %pM for new auth to %pM\n",
4607 ifmgd->associated->bssid, req->bss->bssid);
4608 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4609 WLAN_REASON_UNSPECIFIED,
4610 false, frame_buf);
4611
4612 ieee80211_report_disconnect(sdata, frame_buf,
4613 sizeof(frame_buf), true,
4614 WLAN_REASON_UNSPECIFIED);
4615 }
4616
4617 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4618
4619 err = ieee80211_prep_connection(sdata, req->bss, false, false);
4620 if (err)
4621 goto err_clear;
4622
4623 err = ieee80211_auth(sdata);
4624 if (err) {
4625 sta_info_destroy_addr(sdata, req->bss->bssid);
4626 goto err_clear;
4627 }
4628
4629 /* hold our own reference */
4630 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4631 return 0;
4632
4633 err_clear:
4634 eth_zero_addr(ifmgd->bssid);
4635 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4636 ifmgd->auth_data = NULL;
4637 mutex_lock(&sdata->local->mtx);
4638 ieee80211_vif_release_channel(sdata);
4639 mutex_unlock(&sdata->local->mtx);
4640 err_free:
4641 kfree(auth_data);
4642 return err;
4643 }
4644
4645 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4646 struct cfg80211_assoc_request *req)
4647 {
4648 struct ieee80211_local *local = sdata->local;
4649 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4650 struct ieee80211_bss *bss = (void *)req->bss->priv;
4651 struct ieee80211_mgd_assoc_data *assoc_data;
4652 const struct cfg80211_bss_ies *beacon_ies;
4653 struct ieee80211_supported_band *sband;
4654 const u8 *ssidie, *ht_ie, *vht_ie;
4655 int i, err;
4656 bool override = false;
4657
4658 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4659 if (!assoc_data)
4660 return -ENOMEM;
4661
4662 rcu_read_lock();
4663 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4664 if (!ssidie) {
4665 rcu_read_unlock();
4666 kfree(assoc_data);
4667 return -EINVAL;
4668 }
4669 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4670 assoc_data->ssid_len = ssidie[1];
4671 rcu_read_unlock();
4672
4673 if (ifmgd->associated) {
4674 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4675
4676 sdata_info(sdata,
4677 "disconnect from AP %pM for new assoc to %pM\n",
4678 ifmgd->associated->bssid, req->bss->bssid);
4679 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4680 WLAN_REASON_UNSPECIFIED,
4681 false, frame_buf);
4682
4683 ieee80211_report_disconnect(sdata, frame_buf,
4684 sizeof(frame_buf), true,
4685 WLAN_REASON_UNSPECIFIED);
4686 }
4687
4688 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4689 err = -EBUSY;
4690 goto err_free;
4691 }
4692
4693 if (ifmgd->assoc_data) {
4694 err = -EBUSY;
4695 goto err_free;
4696 }
4697
4698 if (ifmgd->auth_data) {
4699 bool match;
4700
4701 /* keep sta info, bssid if matching */
4702 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4703 ieee80211_destroy_auth_data(sdata, match);
4704 }
4705
4706 /* prepare assoc data */
4707
4708 ifmgd->beacon_crc_valid = false;
4709
4710 assoc_data->wmm = bss->wmm_used &&
4711 (local->hw.queues >= IEEE80211_NUM_ACS);
4712
4713 /*
4714 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4715 * We still associate in non-HT mode (11a/b/g) if any one of these
4716 * ciphers is configured as pairwise.
4717 * We can set this to true for non-11n hardware, that'll be checked
4718 * separately along with the peer capabilities.
4719 */
4720 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4721 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4722 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4723 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4724 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4725 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4726 netdev_info(sdata->dev,
4727 "disabling HT/VHT due to WEP/TKIP use\n");
4728 }
4729 }
4730
4731 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4732 sband = local->hw.wiphy->bands[req->bss->channel->band];
4733 if (!sband->ht_cap.ht_supported ||
4734 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4735 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4736 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4737 if (!bss->wmm_used &&
4738 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4739 netdev_info(sdata->dev,
4740 "disabling HT as WMM/QoS is not supported by the AP\n");
4741 }
4742
4743 /* disable VHT if we don't support it or the AP doesn't use WMM */
4744 if (!sband->vht_cap.vht_supported ||
4745 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4746 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4747 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4748 if (!bss->wmm_used &&
4749 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4750 netdev_info(sdata->dev,
4751 "disabling VHT as WMM/QoS is not supported by the AP\n");
4752 }
4753
4754 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4755 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4756 sizeof(ifmgd->ht_capa_mask));
4757
4758 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4759 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4760 sizeof(ifmgd->vht_capa_mask));
4761
4762 if (req->ie && req->ie_len) {
4763 memcpy(assoc_data->ie, req->ie, req->ie_len);
4764 assoc_data->ie_len = req->ie_len;
4765 }
4766
4767 if (req->fils_kek) {
4768 /* should already be checked in cfg80211 - so warn */
4769 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
4770 err = -EINVAL;
4771 goto err_free;
4772 }
4773 memcpy(assoc_data->fils_kek, req->fils_kek,
4774 req->fils_kek_len);
4775 assoc_data->fils_kek_len = req->fils_kek_len;
4776 }
4777
4778 if (req->fils_nonces)
4779 memcpy(assoc_data->fils_nonces, req->fils_nonces,
4780 2 * FILS_NONCE_LEN);
4781
4782 assoc_data->bss = req->bss;
4783
4784 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4785 if (ifmgd->powersave)
4786 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4787 else
4788 sdata->smps_mode = IEEE80211_SMPS_OFF;
4789 } else
4790 sdata->smps_mode = ifmgd->req_smps;
4791
4792 assoc_data->capability = req->bss->capability;
4793 assoc_data->supp_rates = bss->supp_rates;
4794 assoc_data->supp_rates_len = bss->supp_rates_len;
4795
4796 rcu_read_lock();
4797 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4798 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4799 assoc_data->ap_ht_param =
4800 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4801 else
4802 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4803 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4804 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4805 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4806 sizeof(struct ieee80211_vht_cap));
4807 else
4808 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4809 rcu_read_unlock();
4810
4811 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4812 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4813 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4814 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4815
4816 if (bss->wmm_used && bss->uapsd_supported &&
4817 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4818 assoc_data->uapsd = true;
4819 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4820 } else {
4821 assoc_data->uapsd = false;
4822 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4823 }
4824
4825 if (req->prev_bssid)
4826 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4827
4828 if (req->use_mfp) {
4829 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4830 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4831 } else {
4832 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4833 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4834 }
4835
4836 if (req->flags & ASSOC_REQ_USE_RRM)
4837 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4838 else
4839 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4840
4841 if (req->crypto.control_port)
4842 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4843 else
4844 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4845
4846 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4847 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4848 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4849 sdata->vif.type);
4850
4851 /* kick off associate process */
4852
4853 ifmgd->assoc_data = assoc_data;
4854 ifmgd->dtim_period = 0;
4855 ifmgd->have_beacon = false;
4856
4857 /* override HT/VHT configuration only if the AP and we support it */
4858 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4859 struct ieee80211_sta_ht_cap sta_ht_cap;
4860
4861 if (req->flags & ASSOC_REQ_DISABLE_HT)
4862 override = true;
4863
4864 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4865 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4866
4867 /* check for 40 MHz disable override */
4868 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4869 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4870 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4871 override = true;
4872
4873 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4874 req->flags & ASSOC_REQ_DISABLE_VHT)
4875 override = true;
4876 }
4877
4878 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4879 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4880 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4881 }
4882
4883 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4884 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4885
4886 err = ieee80211_prep_connection(sdata, req->bss, true, override);
4887 if (err)
4888 goto err_clear;
4889
4890 rcu_read_lock();
4891 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4892
4893 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4894 !beacon_ies) {
4895 /*
4896 * Wait up to one beacon interval ...
4897 * should this be more if we miss one?
4898 */
4899 sdata_info(sdata, "waiting for beacon from %pM\n",
4900 ifmgd->bssid);
4901 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4902 assoc_data->timeout_started = true;
4903 assoc_data->need_beacon = true;
4904 } else if (beacon_ies) {
4905 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4906 beacon_ies->data,
4907 beacon_ies->len);
4908 u8 dtim_count = 0;
4909
4910 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4911 const struct ieee80211_tim_ie *tim;
4912 tim = (void *)(tim_ie + 2);
4913 ifmgd->dtim_period = tim->dtim_period;
4914 dtim_count = tim->dtim_count;
4915 }
4916 ifmgd->have_beacon = true;
4917 assoc_data->timeout = jiffies;
4918 assoc_data->timeout_started = true;
4919
4920 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4921 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4922 sdata->vif.bss_conf.sync_device_ts =
4923 bss->device_ts_beacon;
4924 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4925 }
4926 } else {
4927 assoc_data->timeout = jiffies;
4928 assoc_data->timeout_started = true;
4929 }
4930 rcu_read_unlock();
4931
4932 run_again(sdata, assoc_data->timeout);
4933
4934 if (bss->corrupt_data) {
4935 char *corrupt_type = "data";
4936 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4937 if (bss->corrupt_data &
4938 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4939 corrupt_type = "beacon and probe response";
4940 else
4941 corrupt_type = "beacon";
4942 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4943 corrupt_type = "probe response";
4944 sdata_info(sdata, "associating with AP with corrupt %s\n",
4945 corrupt_type);
4946 }
4947
4948 return 0;
4949 err_clear:
4950 eth_zero_addr(ifmgd->bssid);
4951 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4952 ifmgd->assoc_data = NULL;
4953 err_free:
4954 kfree(assoc_data);
4955 return err;
4956 }
4957
4958 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4959 struct cfg80211_deauth_request *req)
4960 {
4961 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4962 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4963 bool tx = !req->local_state_change;
4964
4965 if (ifmgd->auth_data &&
4966 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4967 sdata_info(sdata,
4968 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4969 req->bssid, req->reason_code,
4970 ieee80211_get_reason_code_string(req->reason_code));
4971
4972 drv_mgd_prepare_tx(sdata->local, sdata);
4973 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4974 IEEE80211_STYPE_DEAUTH,
4975 req->reason_code, tx,
4976 frame_buf);
4977 ieee80211_destroy_auth_data(sdata, false);
4978 ieee80211_report_disconnect(sdata, frame_buf,
4979 sizeof(frame_buf), true,
4980 req->reason_code);
4981
4982 return 0;
4983 }
4984
4985 if (ifmgd->assoc_data &&
4986 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4987 sdata_info(sdata,
4988 "aborting association with %pM by local choice (Reason: %u=%s)\n",
4989 req->bssid, req->reason_code,
4990 ieee80211_get_reason_code_string(req->reason_code));
4991
4992 drv_mgd_prepare_tx(sdata->local, sdata);
4993 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4994 IEEE80211_STYPE_DEAUTH,
4995 req->reason_code, tx,
4996 frame_buf);
4997 ieee80211_destroy_assoc_data(sdata, false, true);
4998 ieee80211_report_disconnect(sdata, frame_buf,
4999 sizeof(frame_buf), true,
5000 req->reason_code);
5001 return 0;
5002 }
5003
5004 if (ifmgd->associated &&
5005 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5006 sdata_info(sdata,
5007 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5008 req->bssid, req->reason_code,
5009 ieee80211_get_reason_code_string(req->reason_code));
5010
5011 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5012 req->reason_code, tx, frame_buf);
5013 ieee80211_report_disconnect(sdata, frame_buf,
5014 sizeof(frame_buf), true,
5015 req->reason_code);
5016 return 0;
5017 }
5018
5019 return -ENOTCONN;
5020 }
5021
5022 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5023 struct cfg80211_disassoc_request *req)
5024 {
5025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5026 u8 bssid[ETH_ALEN];
5027 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5028
5029 /*
5030 * cfg80211 should catch this ... but it's racy since
5031 * we can receive a disassoc frame, process it, hand it
5032 * to cfg80211 while that's in a locked section already
5033 * trying to tell us that the user wants to disconnect.
5034 */
5035 if (ifmgd->associated != req->bss)
5036 return -ENOLINK;
5037
5038 sdata_info(sdata,
5039 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5040 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5041
5042 memcpy(bssid, req->bss->bssid, ETH_ALEN);
5043 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5044 req->reason_code, !req->local_state_change,
5045 frame_buf);
5046
5047 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5048 req->reason_code);
5049
5050 return 0;
5051 }
5052
5053 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5054 {
5055 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5056
5057 /*
5058 * Make sure some work items will not run after this,
5059 * they will not do anything but might not have been
5060 * cancelled when disconnecting.
5061 */
5062 cancel_work_sync(&ifmgd->monitor_work);
5063 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5064 cancel_work_sync(&ifmgd->request_smps_work);
5065 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5066 cancel_work_sync(&ifmgd->chswitch_work);
5067 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5068
5069 sdata_lock(sdata);
5070 if (ifmgd->assoc_data) {
5071 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5072 ieee80211_destroy_assoc_data(sdata, false, false);
5073 cfg80211_assoc_timeout(sdata->dev, bss);
5074 }
5075 if (ifmgd->auth_data)
5076 ieee80211_destroy_auth_data(sdata, false);
5077 spin_lock_bh(&ifmgd->teardown_lock);
5078 if (ifmgd->teardown_skb) {
5079 kfree_skb(ifmgd->teardown_skb);
5080 ifmgd->teardown_skb = NULL;
5081 ifmgd->orig_teardown_skb = NULL;
5082 }
5083 spin_unlock_bh(&ifmgd->teardown_lock);
5084 del_timer_sync(&ifmgd->timer);
5085 sdata_unlock(sdata);
5086 }
5087
5088 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5089 enum nl80211_cqm_rssi_threshold_event rssi_event,
5090 s32 rssi_level,
5091 gfp_t gfp)
5092 {
5093 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5094
5095 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5096
5097 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5098 }
5099 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5100
5101 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5102 {
5103 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5104
5105 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5106
5107 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5108 }
5109 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
Linux with added FPC-III support