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d157b250ff7710088dfeee928045f2612e8c5464
[GitHub/MotorolaMobilityLLC/kernel-slsi.git] / net / mac80211 / mlme.c
1 /*
2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 * Copyright (C) 2015 - 2016 Intel Deutschland GmbH
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15
16 #include <linux/delay.h>
17 #include <linux/if_ether.h>
18 #include <linux/skbuff.h>
19 #include <linux/if_arp.h>
20 #include <linux/etherdevice.h>
21 #include <linux/moduleparam.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/crc32.h>
24 #include <linux/slab.h>
25 #include <linux/export.h>
26 #include <net/mac80211.h>
27 #include <asm/unaligned.h>
28
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
31 #include "rate.h"
32 #include "led.h"
33 #include "fils_aead.h"
34
35 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
36 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
37 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
38 #define IEEE80211_AUTH_MAX_TRIES 3
39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
41 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
42 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
43 #define IEEE80211_ASSOC_MAX_TRIES 3
44
45 static int max_nullfunc_tries = 2;
46 module_param(max_nullfunc_tries, int, 0644);
47 MODULE_PARM_DESC(max_nullfunc_tries,
48 "Maximum nullfunc tx tries before disconnecting (reason 4).");
49
50 static int max_probe_tries = 5;
51 module_param(max_probe_tries, int, 0644);
52 MODULE_PARM_DESC(max_probe_tries,
53 "Maximum probe tries before disconnecting (reason 4).");
54
55 /*
56 * Beacon loss timeout is calculated as N frames times the
57 * advertised beacon interval. This may need to be somewhat
58 * higher than what hardware might detect to account for
59 * delays in the host processing frames. But since we also
60 * probe on beacon miss before declaring the connection lost
61 * default to what we want.
62 */
63 static int beacon_loss_count = 7;
64 module_param(beacon_loss_count, int, 0644);
65 MODULE_PARM_DESC(beacon_loss_count,
66 "Number of beacon intervals before we decide beacon was lost.");
67
68 /*
69 * Time the connection can be idle before we probe
70 * it to see if we can still talk to the AP.
71 */
72 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
73 /*
74 * Time we wait for a probe response after sending
75 * a probe request because of beacon loss or for
76 * checking the connection still works.
77 */
78 static int probe_wait_ms = 500;
79 module_param(probe_wait_ms, int, 0644);
80 MODULE_PARM_DESC(probe_wait_ms,
81 "Maximum time(ms) to wait for probe response"
82 " before disconnecting (reason 4).");
83
84 /*
85 * How many Beacon frames need to have been used in average signal strength
86 * before starting to indicate signal change events.
87 */
88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
89
90 /*
91 * We can have multiple work items (and connection probing)
92 * scheduling this timer, but we need to take care to only
93 * reschedule it when it should fire _earlier_ than it was
94 * asked for before, or if it's not pending right now. This
95 * function ensures that. Note that it then is required to
96 * run this function for all timeouts after the first one
97 * has happened -- the work that runs from this timer will
98 * do that.
99 */
100 static void run_again(struct ieee80211_sub_if_data *sdata,
101 unsigned long timeout)
102 {
103 sdata_assert_lock(sdata);
104
105 if (!timer_pending(&sdata->u.mgd.timer) ||
106 time_before(timeout, sdata->u.mgd.timer.expires))
107 mod_timer(&sdata->u.mgd.timer, timeout);
108 }
109
110 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
111 {
112 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
113 return;
114
115 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
116 return;
117
118 mod_timer(&sdata->u.mgd.bcn_mon_timer,
119 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
120 }
121
122 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
123 {
124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
125
126 if (unlikely(!ifmgd->associated))
127 return;
128
129 if (ifmgd->probe_send_count)
130 ifmgd->probe_send_count = 0;
131
132 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
133 return;
134
135 mod_timer(&ifmgd->conn_mon_timer,
136 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
137 }
138
139 static int ecw2cw(int ecw)
140 {
141 return (1 << ecw) - 1;
142 }
143
144 static u32
145 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
146 struct ieee80211_supported_band *sband,
147 struct ieee80211_channel *channel,
148 const struct ieee80211_ht_cap *ht_cap,
149 const struct ieee80211_ht_operation *ht_oper,
150 const struct ieee80211_vht_operation *vht_oper,
151 struct cfg80211_chan_def *chandef, bool tracking)
152 {
153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
154 struct cfg80211_chan_def vht_chandef;
155 struct ieee80211_sta_ht_cap sta_ht_cap;
156 u32 ht_cfreq, ret;
157
158 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
159 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
160
161 chandef->chan = channel;
162 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
163 chandef->center_freq1 = channel->center_freq;
164 chandef->center_freq2 = 0;
165
166 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
167 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
168 goto out;
169 }
170
171 chandef->width = NL80211_CHAN_WIDTH_20;
172
173 if (!(ht_cap->cap_info &
174 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
175 ret = IEEE80211_STA_DISABLE_40MHZ;
176 vht_chandef = *chandef;
177 goto out;
178 }
179
180 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
181 channel->band);
182 /* check that channel matches the right operating channel */
183 if (!tracking && channel->center_freq != ht_cfreq) {
184 /*
185 * It's possible that some APs are confused here;
186 * Netgear WNDR3700 sometimes reports 4 higher than
187 * the actual channel in association responses, but
188 * since we look at probe response/beacon data here
189 * it should be OK.
190 */
191 sdata_info(sdata,
192 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
193 channel->center_freq, ht_cfreq,
194 ht_oper->primary_chan, channel->band);
195 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
196 goto out;
197 }
198
199 /* check 40 MHz support, if we have it */
200 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
201 ieee80211_chandef_ht_oper(ht_oper, chandef);
202 } else {
203 /* 40 MHz (and 80 MHz) must be supported for VHT */
204 ret = IEEE80211_STA_DISABLE_VHT;
205 /* also mark 40 MHz disabled */
206 ret |= IEEE80211_STA_DISABLE_40MHZ;
207 goto out;
208 }
209
210 if (!vht_oper || !sband->vht_cap.vht_supported) {
211 ret = IEEE80211_STA_DISABLE_VHT;
212 goto out;
213 }
214
215 vht_chandef = *chandef;
216 if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) {
217 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
218 sdata_info(sdata,
219 "AP VHT information is invalid, disable VHT\n");
220 ret = IEEE80211_STA_DISABLE_VHT;
221 goto out;
222 }
223
224 if (!cfg80211_chandef_valid(&vht_chandef)) {
225 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
226 sdata_info(sdata,
227 "AP VHT information is invalid, disable VHT\n");
228 ret = IEEE80211_STA_DISABLE_VHT;
229 goto out;
230 }
231
232 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
233 ret = 0;
234 goto out;
235 }
236
237 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
238 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
239 sdata_info(sdata,
240 "AP VHT information doesn't match HT, disable VHT\n");
241 ret = IEEE80211_STA_DISABLE_VHT;
242 goto out;
243 }
244
245 *chandef = vht_chandef;
246
247 ret = 0;
248
249 out:
250 /*
251 * When tracking the current AP, don't do any further checks if the
252 * new chandef is identical to the one we're currently using for the
253 * connection. This keeps us from playing ping-pong with regulatory,
254 * without it the following can happen (for example):
255 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
256 * - AP advertises regdom US
257 * - CRDA loads regdom US with 80 MHz prohibited (old database)
258 * - the code below detects an unsupported channel, downgrades, and
259 * we disconnect from the AP in the caller
260 * - disconnect causes CRDA to reload world regdomain and the game
261 * starts anew.
262 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
263 *
264 * It seems possible that there are still scenarios with CSA or real
265 * bandwidth changes where a this could happen, but those cases are
266 * less common and wouldn't completely prevent using the AP.
267 */
268 if (tracking &&
269 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
270 return ret;
271
272 /* don't print the message below for VHT mismatch if VHT is disabled */
273 if (ret & IEEE80211_STA_DISABLE_VHT)
274 vht_chandef = *chandef;
275
276 /*
277 * Ignore the DISABLED flag when we're already connected and only
278 * tracking the APs beacon for bandwidth changes - otherwise we
279 * might get disconnected here if we connect to an AP, update our
280 * regulatory information based on the AP's country IE and the
281 * information we have is wrong/outdated and disables the channel
282 * that we're actually using for the connection to the AP.
283 */
284 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
285 tracking ? 0 :
286 IEEE80211_CHAN_DISABLED)) {
287 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
288 ret = IEEE80211_STA_DISABLE_HT |
289 IEEE80211_STA_DISABLE_VHT;
290 break;
291 }
292
293 ret |= ieee80211_chandef_downgrade(chandef);
294 }
295
296 if (chandef->width != vht_chandef.width && !tracking)
297 sdata_info(sdata,
298 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
299
300 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
301 return ret;
302 }
303
304 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
305 struct sta_info *sta,
306 const struct ieee80211_ht_cap *ht_cap,
307 const struct ieee80211_ht_operation *ht_oper,
308 const struct ieee80211_vht_operation *vht_oper,
309 const u8 *bssid, u32 *changed)
310 {
311 struct ieee80211_local *local = sdata->local;
312 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
313 struct ieee80211_supported_band *sband;
314 struct ieee80211_channel *chan;
315 struct cfg80211_chan_def chandef;
316 u16 ht_opmode;
317 u32 flags;
318 enum ieee80211_sta_rx_bandwidth new_sta_bw;
319 int ret;
320
321 /* if HT was/is disabled, don't track any bandwidth changes */
322 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
323 return 0;
324
325 /* don't check VHT if we associated as non-VHT station */
326 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
327 vht_oper = NULL;
328
329 if (WARN_ON_ONCE(!sta))
330 return -EINVAL;
331
332 /*
333 * if bss configuration changed store the new one -
334 * this may be applicable even if channel is identical
335 */
336 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
337 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
338 *changed |= BSS_CHANGED_HT;
339 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
340 }
341
342 chan = sdata->vif.bss_conf.chandef.chan;
343 sband = local->hw.wiphy->bands[chan->band];
344
345 /* calculate new channel (type) based on HT/VHT operation IEs */
346 flags = ieee80211_determine_chantype(sdata, sband, chan,
347 ht_cap, ht_oper, vht_oper,
348 &chandef, true);
349
350 /*
351 * Downgrade the new channel if we associated with restricted
352 * capabilities. For example, if we associated as a 20 MHz STA
353 * to a 40 MHz AP (due to regulatory, capabilities or config
354 * reasons) then switching to a 40 MHz channel now won't do us
355 * any good -- we couldn't use it with the AP.
356 */
357 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
358 chandef.width == NL80211_CHAN_WIDTH_80P80)
359 flags |= ieee80211_chandef_downgrade(&chandef);
360 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
361 chandef.width == NL80211_CHAN_WIDTH_160)
362 flags |= ieee80211_chandef_downgrade(&chandef);
363 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
364 chandef.width > NL80211_CHAN_WIDTH_20)
365 flags |= ieee80211_chandef_downgrade(&chandef);
366
367 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
368 return 0;
369
370 sdata_info(sdata,
371 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
372 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
373 chandef.center_freq1, chandef.center_freq2);
374
375 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
376 IEEE80211_STA_DISABLE_VHT |
377 IEEE80211_STA_DISABLE_40MHZ |
378 IEEE80211_STA_DISABLE_80P80MHZ |
379 IEEE80211_STA_DISABLE_160MHZ)) ||
380 !cfg80211_chandef_valid(&chandef)) {
381 sdata_info(sdata,
382 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
383 ifmgd->bssid);
384 return -EINVAL;
385 }
386
387 switch (chandef.width) {
388 case NL80211_CHAN_WIDTH_20_NOHT:
389 case NL80211_CHAN_WIDTH_20:
390 new_sta_bw = IEEE80211_STA_RX_BW_20;
391 break;
392 case NL80211_CHAN_WIDTH_40:
393 new_sta_bw = IEEE80211_STA_RX_BW_40;
394 break;
395 case NL80211_CHAN_WIDTH_80:
396 new_sta_bw = IEEE80211_STA_RX_BW_80;
397 break;
398 case NL80211_CHAN_WIDTH_80P80:
399 case NL80211_CHAN_WIDTH_160:
400 new_sta_bw = IEEE80211_STA_RX_BW_160;
401 break;
402 default:
403 return -EINVAL;
404 }
405
406 if (new_sta_bw > sta->cur_max_bandwidth)
407 new_sta_bw = sta->cur_max_bandwidth;
408
409 if (new_sta_bw < sta->sta.bandwidth) {
410 sta->sta.bandwidth = new_sta_bw;
411 rate_control_rate_update(local, sband, sta,
412 IEEE80211_RC_BW_CHANGED);
413 }
414
415 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
416 if (ret) {
417 sdata_info(sdata,
418 "AP %pM changed bandwidth to incompatible one - disconnect\n",
419 ifmgd->bssid);
420 return ret;
421 }
422
423 if (new_sta_bw > sta->sta.bandwidth) {
424 sta->sta.bandwidth = new_sta_bw;
425 rate_control_rate_update(local, sband, sta,
426 IEEE80211_RC_BW_CHANGED);
427 }
428
429 return 0;
430 }
431
432 /* frame sending functions */
433
434 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
435 struct sk_buff *skb, u8 ap_ht_param,
436 struct ieee80211_supported_band *sband,
437 struct ieee80211_channel *channel,
438 enum ieee80211_smps_mode smps)
439 {
440 u8 *pos;
441 u32 flags = channel->flags;
442 u16 cap;
443 struct ieee80211_sta_ht_cap ht_cap;
444
445 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
446
447 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
448 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
449
450 /* determine capability flags */
451 cap = ht_cap.cap;
452
453 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
454 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
455 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
456 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
457 cap &= ~IEEE80211_HT_CAP_SGI_40;
458 }
459 break;
460 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
461 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
462 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
463 cap &= ~IEEE80211_HT_CAP_SGI_40;
464 }
465 break;
466 }
467
468 /*
469 * If 40 MHz was disabled associate as though we weren't
470 * capable of 40 MHz -- some broken APs will never fall
471 * back to trying to transmit in 20 MHz.
472 */
473 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
474 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
475 cap &= ~IEEE80211_HT_CAP_SGI_40;
476 }
477
478 /* set SM PS mode properly */
479 cap &= ~IEEE80211_HT_CAP_SM_PS;
480 switch (smps) {
481 case IEEE80211_SMPS_AUTOMATIC:
482 case IEEE80211_SMPS_NUM_MODES:
483 WARN_ON(1);
484 case IEEE80211_SMPS_OFF:
485 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
486 IEEE80211_HT_CAP_SM_PS_SHIFT;
487 break;
488 case IEEE80211_SMPS_STATIC:
489 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
490 IEEE80211_HT_CAP_SM_PS_SHIFT;
491 break;
492 case IEEE80211_SMPS_DYNAMIC:
493 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
494 IEEE80211_HT_CAP_SM_PS_SHIFT;
495 break;
496 }
497
498 /* reserve and fill IE */
499 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
500 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
501 }
502
503 /* This function determines vht capability flags for the association
504 * and builds the IE.
505 * Note - the function may set the owner of the MU-MIMO capability
506 */
507 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
508 struct sk_buff *skb,
509 struct ieee80211_supported_band *sband,
510 struct ieee80211_vht_cap *ap_vht_cap)
511 {
512 struct ieee80211_local *local = sdata->local;
513 u8 *pos;
514 u32 cap;
515 struct ieee80211_sta_vht_cap vht_cap;
516 u32 mask, ap_bf_sts, our_bf_sts;
517
518 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
519
520 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
521 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
522
523 /* determine capability flags */
524 cap = vht_cap.cap;
525
526 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
527 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
528
529 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
530 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
531 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
532 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
533 }
534
535 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
536 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
537 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
538 }
539
540 /*
541 * Some APs apparently get confused if our capabilities are better
542 * than theirs, so restrict what we advertise in the assoc request.
543 */
544 if (!(ap_vht_cap->vht_cap_info &
545 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
546 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
547 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
548 else if (!(ap_vht_cap->vht_cap_info &
549 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
550 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
551
552 /*
553 * If some other vif is using the MU-MIMO capablity we cannot associate
554 * using MU-MIMO - this will lead to contradictions in the group-id
555 * mechanism.
556 * Ownership is defined since association request, in order to avoid
557 * simultaneous associations with MU-MIMO.
558 */
559 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
560 bool disable_mu_mimo = false;
561 struct ieee80211_sub_if_data *other;
562
563 list_for_each_entry_rcu(other, &local->interfaces, list) {
564 if (other->vif.mu_mimo_owner) {
565 disable_mu_mimo = true;
566 break;
567 }
568 }
569 if (disable_mu_mimo)
570 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
571 else
572 sdata->vif.mu_mimo_owner = true;
573 }
574
575 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
576
577 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
578 our_bf_sts = cap & mask;
579
580 if (ap_bf_sts < our_bf_sts) {
581 cap &= ~mask;
582 cap |= ap_bf_sts;
583 }
584
585 /* reserve and fill IE */
586 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
587 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
588 }
589
590 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
591 {
592 struct ieee80211_local *local = sdata->local;
593 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
594 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
595 struct sk_buff *skb;
596 struct ieee80211_mgmt *mgmt;
597 u8 *pos, qos_info;
598 size_t offset = 0, noffset;
599 int i, count, rates_len, supp_rates_len, shift;
600 u16 capab;
601 struct ieee80211_supported_band *sband;
602 struct ieee80211_chanctx_conf *chanctx_conf;
603 struct ieee80211_channel *chan;
604 u32 rate_flags, rates = 0;
605
606 sdata_assert_lock(sdata);
607
608 rcu_read_lock();
609 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
610 if (WARN_ON(!chanctx_conf)) {
611 rcu_read_unlock();
612 return;
613 }
614 chan = chanctx_conf->def.chan;
615 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
616 rcu_read_unlock();
617 sband = local->hw.wiphy->bands[chan->band];
618 shift = ieee80211_vif_get_shift(&sdata->vif);
619
620 if (assoc_data->supp_rates_len) {
621 /*
622 * Get all rates supported by the device and the AP as
623 * some APs don't like getting a superset of their rates
624 * in the association request (e.g. D-Link DAP 1353 in
625 * b-only mode)...
626 */
627 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
628 assoc_data->supp_rates,
629 assoc_data->supp_rates_len,
630 &rates);
631 } else {
632 /*
633 * In case AP not provide any supported rates information
634 * before association, we send information element(s) with
635 * all rates that we support.
636 */
637 rates_len = 0;
638 for (i = 0; i < sband->n_bitrates; i++) {
639 if ((rate_flags & sband->bitrates[i].flags)
640 != rate_flags)
641 continue;
642 rates |= BIT(i);
643 rates_len++;
644 }
645 }
646
647 skb = alloc_skb(local->hw.extra_tx_headroom +
648 sizeof(*mgmt) + /* bit too much but doesn't matter */
649 2 + assoc_data->ssid_len + /* SSID */
650 4 + rates_len + /* (extended) rates */
651 4 + /* power capability */
652 2 + 2 * sband->n_channels + /* supported channels */
653 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
654 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
655 assoc_data->ie_len + /* extra IEs */
656 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
657 9, /* WMM */
658 GFP_KERNEL);
659 if (!skb)
660 return;
661
662 skb_reserve(skb, local->hw.extra_tx_headroom);
663
664 capab = WLAN_CAPABILITY_ESS;
665
666 if (sband->band == NL80211_BAND_2GHZ) {
667 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
668 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
669 }
670
671 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
672 capab |= WLAN_CAPABILITY_PRIVACY;
673
674 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
675 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
676 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
677
678 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
679 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
680
681 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
682 memset(mgmt, 0, 24);
683 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
684 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
685 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
686
687 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
688 skb_put(skb, 10);
689 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
690 IEEE80211_STYPE_REASSOC_REQ);
691 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
692 mgmt->u.reassoc_req.listen_interval =
693 cpu_to_le16(local->hw.conf.listen_interval);
694 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
695 ETH_ALEN);
696 } else {
697 skb_put(skb, 4);
698 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
699 IEEE80211_STYPE_ASSOC_REQ);
700 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
701 mgmt->u.assoc_req.listen_interval =
702 cpu_to_le16(local->hw.conf.listen_interval);
703 }
704
705 /* SSID */
706 pos = skb_put(skb, 2 + assoc_data->ssid_len);
707 *pos++ = WLAN_EID_SSID;
708 *pos++ = assoc_data->ssid_len;
709 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
710
711 /* add all rates which were marked to be used above */
712 supp_rates_len = rates_len;
713 if (supp_rates_len > 8)
714 supp_rates_len = 8;
715
716 pos = skb_put(skb, supp_rates_len + 2);
717 *pos++ = WLAN_EID_SUPP_RATES;
718 *pos++ = supp_rates_len;
719
720 count = 0;
721 for (i = 0; i < sband->n_bitrates; i++) {
722 if (BIT(i) & rates) {
723 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
724 5 * (1 << shift));
725 *pos++ = (u8) rate;
726 if (++count == 8)
727 break;
728 }
729 }
730
731 if (rates_len > count) {
732 pos = skb_put(skb, rates_len - count + 2);
733 *pos++ = WLAN_EID_EXT_SUPP_RATES;
734 *pos++ = rates_len - count;
735
736 for (i++; i < sband->n_bitrates; i++) {
737 if (BIT(i) & rates) {
738 int rate;
739 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
740 5 * (1 << shift));
741 *pos++ = (u8) rate;
742 }
743 }
744 }
745
746 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
747 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
748 pos = skb_put(skb, 4);
749 *pos++ = WLAN_EID_PWR_CAPABILITY;
750 *pos++ = 2;
751 *pos++ = 0; /* min tx power */
752 /* max tx power */
753 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
754 }
755
756 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
757 /* TODO: get this in reg domain format */
758 pos = skb_put(skb, 2 * sband->n_channels + 2);
759 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
760 *pos++ = 2 * sband->n_channels;
761 for (i = 0; i < sband->n_channels; i++) {
762 *pos++ = ieee80211_frequency_to_channel(
763 sband->channels[i].center_freq);
764 *pos++ = 1; /* one channel in the subband*/
765 }
766 }
767
768 /* if present, add any custom IEs that go before HT */
769 if (assoc_data->ie_len) {
770 static const u8 before_ht[] = {
771 WLAN_EID_SSID,
772 WLAN_EID_SUPP_RATES,
773 WLAN_EID_EXT_SUPP_RATES,
774 WLAN_EID_PWR_CAPABILITY,
775 WLAN_EID_SUPPORTED_CHANNELS,
776 WLAN_EID_RSN,
777 WLAN_EID_QOS_CAPA,
778 WLAN_EID_RRM_ENABLED_CAPABILITIES,
779 WLAN_EID_MOBILITY_DOMAIN,
780 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
781 WLAN_EID_RIC_DATA, /* reassoc only */
782 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
783 };
784 static const u8 after_ric[] = {
785 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
786 WLAN_EID_HT_CAPABILITY,
787 WLAN_EID_BSS_COEX_2040,
788 WLAN_EID_EXT_CAPABILITY,
789 WLAN_EID_QOS_TRAFFIC_CAPA,
790 WLAN_EID_TIM_BCAST_REQ,
791 WLAN_EID_INTERWORKING,
792 /* 60GHz doesn't happen right now */
793 WLAN_EID_VHT_CAPABILITY,
794 WLAN_EID_OPMODE_NOTIF,
795 };
796
797 noffset = ieee80211_ie_split_ric(assoc_data->ie,
798 assoc_data->ie_len,
799 before_ht,
800 ARRAY_SIZE(before_ht),
801 after_ric,
802 ARRAY_SIZE(after_ric),
803 offset);
804 pos = skb_put(skb, noffset - offset);
805 memcpy(pos, assoc_data->ie + offset, noffset - offset);
806 offset = noffset;
807 }
808
809 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
810 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
811 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
812
813 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
814 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
815 sband, chan, sdata->smps_mode);
816
817 /* if present, add any custom IEs that go before VHT */
818 if (assoc_data->ie_len) {
819 static const u8 before_vht[] = {
820 WLAN_EID_SSID,
821 WLAN_EID_SUPP_RATES,
822 WLAN_EID_EXT_SUPP_RATES,
823 WLAN_EID_PWR_CAPABILITY,
824 WLAN_EID_SUPPORTED_CHANNELS,
825 WLAN_EID_RSN,
826 WLAN_EID_QOS_CAPA,
827 WLAN_EID_RRM_ENABLED_CAPABILITIES,
828 WLAN_EID_MOBILITY_DOMAIN,
829 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
830 WLAN_EID_HT_CAPABILITY,
831 WLAN_EID_BSS_COEX_2040,
832 WLAN_EID_EXT_CAPABILITY,
833 WLAN_EID_QOS_TRAFFIC_CAPA,
834 WLAN_EID_TIM_BCAST_REQ,
835 WLAN_EID_INTERWORKING,
836 };
837
838 /* RIC already taken above, so no need to handle here anymore */
839 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
840 before_vht, ARRAY_SIZE(before_vht),
841 offset);
842 pos = skb_put(skb, noffset - offset);
843 memcpy(pos, assoc_data->ie + offset, noffset - offset);
844 offset = noffset;
845 }
846
847 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
848 ieee80211_add_vht_ie(sdata, skb, sband,
849 &assoc_data->ap_vht_cap);
850
851 /* if present, add any custom non-vendor IEs that go after HT */
852 if (assoc_data->ie_len) {
853 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
854 assoc_data->ie_len,
855 offset);
856 pos = skb_put(skb, noffset - offset);
857 memcpy(pos, assoc_data->ie + offset, noffset - offset);
858 offset = noffset;
859 }
860
861 if (assoc_data->wmm) {
862 if (assoc_data->uapsd) {
863 qos_info = ifmgd->uapsd_queues;
864 qos_info |= (ifmgd->uapsd_max_sp_len <<
865 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
866 } else {
867 qos_info = 0;
868 }
869
870 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
871 }
872
873 /* add any remaining custom (i.e. vendor specific here) IEs */
874 if (assoc_data->ie_len) {
875 noffset = assoc_data->ie_len;
876 pos = skb_put(skb, noffset - offset);
877 memcpy(pos, assoc_data->ie + offset, noffset - offset);
878 }
879
880 if (assoc_data->fils_kek_len &&
881 fils_encrypt_assoc_req(skb, assoc_data) < 0) {
882 dev_kfree_skb(skb);
883 return;
884 }
885
886 drv_mgd_prepare_tx(local, sdata);
887
888 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
889 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
890 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
891 IEEE80211_TX_INTFL_MLME_CONN_TX;
892 ieee80211_tx_skb(sdata, skb);
893 }
894
895 void ieee80211_send_pspoll(struct ieee80211_local *local,
896 struct ieee80211_sub_if_data *sdata)
897 {
898 struct ieee80211_pspoll *pspoll;
899 struct sk_buff *skb;
900
901 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
902 if (!skb)
903 return;
904
905 pspoll = (struct ieee80211_pspoll *) skb->data;
906 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
907
908 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
909 ieee80211_tx_skb(sdata, skb);
910 }
911
912 void ieee80211_send_nullfunc(struct ieee80211_local *local,
913 struct ieee80211_sub_if_data *sdata,
914 bool powersave)
915 {
916 struct sk_buff *skb;
917 struct ieee80211_hdr_3addr *nullfunc;
918 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
919
920 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
921 if (!skb)
922 return;
923
924 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
925 if (powersave)
926 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
927
928 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
929 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
930
931 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
932 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
933
934 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
935 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
936
937 ieee80211_tx_skb(sdata, skb);
938 }
939
940 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
941 struct ieee80211_sub_if_data *sdata)
942 {
943 struct sk_buff *skb;
944 struct ieee80211_hdr *nullfunc;
945 __le16 fc;
946
947 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
948 return;
949
950 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
951 if (!skb)
952 return;
953
954 skb_reserve(skb, local->hw.extra_tx_headroom);
955
956 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
957 memset(nullfunc, 0, 30);
958 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
959 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
960 nullfunc->frame_control = fc;
961 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
962 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
963 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
964 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
965
966 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
967 ieee80211_tx_skb(sdata, skb);
968 }
969
970 /* spectrum management related things */
971 static void ieee80211_chswitch_work(struct work_struct *work)
972 {
973 struct ieee80211_sub_if_data *sdata =
974 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
975 struct ieee80211_local *local = sdata->local;
976 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
977 int ret;
978
979 if (!ieee80211_sdata_running(sdata))
980 return;
981
982 sdata_lock(sdata);
983 mutex_lock(&local->mtx);
984 mutex_lock(&local->chanctx_mtx);
985
986 if (!ifmgd->associated)
987 goto out;
988
989 if (!sdata->vif.csa_active)
990 goto out;
991
992 /*
993 * using reservation isn't immediate as it may be deferred until later
994 * with multi-vif. once reservation is complete it will re-schedule the
995 * work with no reserved_chanctx so verify chandef to check if it
996 * completed successfully
997 */
998
999 if (sdata->reserved_chanctx) {
1000 /*
1001 * with multi-vif csa driver may call ieee80211_csa_finish()
1002 * many times while waiting for other interfaces to use their
1003 * reservations
1004 */
1005 if (sdata->reserved_ready)
1006 goto out;
1007
1008 ret = ieee80211_vif_use_reserved_context(sdata);
1009 if (ret) {
1010 sdata_info(sdata,
1011 "failed to use reserved channel context, disconnecting (err=%d)\n",
1012 ret);
1013 ieee80211_queue_work(&sdata->local->hw,
1014 &ifmgd->csa_connection_drop_work);
1015 goto out;
1016 }
1017
1018 goto out;
1019 }
1020
1021 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1022 &sdata->csa_chandef)) {
1023 sdata_info(sdata,
1024 "failed to finalize channel switch, disconnecting\n");
1025 ieee80211_queue_work(&sdata->local->hw,
1026 &ifmgd->csa_connection_drop_work);
1027 goto out;
1028 }
1029
1030 /* XXX: shouldn't really modify cfg80211-owned data! */
1031 ifmgd->associated->channel = sdata->csa_chandef.chan;
1032
1033 ifmgd->csa_waiting_bcn = true;
1034
1035 ieee80211_sta_reset_beacon_monitor(sdata);
1036 ieee80211_sta_reset_conn_monitor(sdata);
1037
1038 out:
1039 mutex_unlock(&local->chanctx_mtx);
1040 mutex_unlock(&local->mtx);
1041 sdata_unlock(sdata);
1042 }
1043
1044 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1045 {
1046 struct ieee80211_local *local = sdata->local;
1047 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1048 int ret;
1049
1050 sdata_assert_lock(sdata);
1051
1052 WARN_ON(!sdata->vif.csa_active);
1053
1054 if (sdata->csa_block_tx) {
1055 ieee80211_wake_vif_queues(local, sdata,
1056 IEEE80211_QUEUE_STOP_REASON_CSA);
1057 sdata->csa_block_tx = false;
1058 }
1059
1060 sdata->vif.csa_active = false;
1061 ifmgd->csa_waiting_bcn = false;
1062
1063 ret = drv_post_channel_switch(sdata);
1064 if (ret) {
1065 sdata_info(sdata,
1066 "driver post channel switch failed, disconnecting\n");
1067 ieee80211_queue_work(&local->hw,
1068 &ifmgd->csa_connection_drop_work);
1069 return;
1070 }
1071
1072 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1073 }
1074
1075 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1076 {
1077 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1078 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1079
1080 trace_api_chswitch_done(sdata, success);
1081 if (!success) {
1082 sdata_info(sdata,
1083 "driver channel switch failed, disconnecting\n");
1084 ieee80211_queue_work(&sdata->local->hw,
1085 &ifmgd->csa_connection_drop_work);
1086 } else {
1087 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1088 }
1089 }
1090 EXPORT_SYMBOL(ieee80211_chswitch_done);
1091
1092 static void ieee80211_chswitch_timer(unsigned long data)
1093 {
1094 struct ieee80211_sub_if_data *sdata =
1095 (struct ieee80211_sub_if_data *) data;
1096
1097 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1098 }
1099
1100 static void
1101 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1102 u64 timestamp, u32 device_timestamp,
1103 struct ieee802_11_elems *elems,
1104 bool beacon)
1105 {
1106 struct ieee80211_local *local = sdata->local;
1107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1108 struct cfg80211_bss *cbss = ifmgd->associated;
1109 struct ieee80211_chanctx_conf *conf;
1110 struct ieee80211_chanctx *chanctx;
1111 enum nl80211_band current_band;
1112 struct ieee80211_csa_ie csa_ie;
1113 struct ieee80211_channel_switch ch_switch;
1114 int res;
1115
1116 sdata_assert_lock(sdata);
1117
1118 if (!cbss)
1119 return;
1120
1121 if (local->scanning)
1122 return;
1123
1124 /* disregard subsequent announcements if we are already processing */
1125 if (sdata->vif.csa_active)
1126 return;
1127
1128 current_band = cbss->channel->band;
1129 memset(&csa_ie, 0, sizeof(csa_ie));
1130 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1131 ifmgd->flags,
1132 ifmgd->associated->bssid, &csa_ie);
1133 if (res < 0)
1134 ieee80211_queue_work(&local->hw,
1135 &ifmgd->csa_connection_drop_work);
1136 if (res)
1137 return;
1138
1139 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1140 IEEE80211_CHAN_DISABLED)) {
1141 sdata_info(sdata,
1142 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1143 ifmgd->associated->bssid,
1144 csa_ie.chandef.chan->center_freq,
1145 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1146 csa_ie.chandef.center_freq2);
1147 ieee80211_queue_work(&local->hw,
1148 &ifmgd->csa_connection_drop_work);
1149 return;
1150 }
1151
1152 if (cfg80211_chandef_identical(&csa_ie.chandef,
1153 &sdata->vif.bss_conf.chandef)) {
1154 if (ifmgd->csa_ignored_same_chan)
1155 return;
1156 sdata_info(sdata,
1157 "AP %pM tries to chanswitch to same channel, ignore\n",
1158 ifmgd->associated->bssid);
1159 ifmgd->csa_ignored_same_chan = true;
1160 return;
1161 }
1162
1163 /*
1164 * Drop all TDLS peers - either we disconnect or move to a different
1165 * channel from this point on. There's no telling what our peer will do.
1166 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1167 * have an incompatible wider chandef.
1168 */
1169 ieee80211_teardown_tdls_peers(sdata);
1170
1171 mutex_lock(&local->mtx);
1172 mutex_lock(&local->chanctx_mtx);
1173 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1174 lockdep_is_held(&local->chanctx_mtx));
1175 if (!conf) {
1176 sdata_info(sdata,
1177 "no channel context assigned to vif?, disconnecting\n");
1178 goto drop_connection;
1179 }
1180
1181 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1182
1183 if (local->use_chanctx &&
1184 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1185 sdata_info(sdata,
1186 "driver doesn't support chan-switch with channel contexts\n");
1187 goto drop_connection;
1188 }
1189
1190 ch_switch.timestamp = timestamp;
1191 ch_switch.device_timestamp = device_timestamp;
1192 ch_switch.block_tx = csa_ie.mode;
1193 ch_switch.chandef = csa_ie.chandef;
1194 ch_switch.count = csa_ie.count;
1195
1196 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1197 sdata_info(sdata,
1198 "preparing for channel switch failed, disconnecting\n");
1199 goto drop_connection;
1200 }
1201
1202 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1203 chanctx->mode, false);
1204 if (res) {
1205 sdata_info(sdata,
1206 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1207 res);
1208 goto drop_connection;
1209 }
1210 mutex_unlock(&local->chanctx_mtx);
1211
1212 sdata->vif.csa_active = true;
1213 sdata->csa_chandef = csa_ie.chandef;
1214 sdata->csa_block_tx = csa_ie.mode;
1215 ifmgd->csa_ignored_same_chan = false;
1216
1217 if (sdata->csa_block_tx)
1218 ieee80211_stop_vif_queues(local, sdata,
1219 IEEE80211_QUEUE_STOP_REASON_CSA);
1220 mutex_unlock(&local->mtx);
1221
1222 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1223 csa_ie.count);
1224
1225 if (local->ops->channel_switch) {
1226 /* use driver's channel switch callback */
1227 drv_channel_switch(local, sdata, &ch_switch);
1228 return;
1229 }
1230
1231 /* channel switch handled in software */
1232 if (csa_ie.count <= 1)
1233 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1234 else
1235 mod_timer(&ifmgd->chswitch_timer,
1236 TU_TO_EXP_TIME((csa_ie.count - 1) *
1237 cbss->beacon_interval));
1238 return;
1239 drop_connection:
1240 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1241 mutex_unlock(&local->chanctx_mtx);
1242 mutex_unlock(&local->mtx);
1243 }
1244
1245 static bool
1246 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1247 struct ieee80211_channel *channel,
1248 const u8 *country_ie, u8 country_ie_len,
1249 const u8 *pwr_constr_elem,
1250 int *chan_pwr, int *pwr_reduction)
1251 {
1252 struct ieee80211_country_ie_triplet *triplet;
1253 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1254 int i, chan_increment;
1255 bool have_chan_pwr = false;
1256
1257 /* Invalid IE */
1258 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1259 return false;
1260
1261 triplet = (void *)(country_ie + 3);
1262 country_ie_len -= 3;
1263
1264 switch (channel->band) {
1265 default:
1266 WARN_ON_ONCE(1);
1267 /* fall through */
1268 case NL80211_BAND_2GHZ:
1269 case NL80211_BAND_60GHZ:
1270 chan_increment = 1;
1271 break;
1272 case NL80211_BAND_5GHZ:
1273 chan_increment = 4;
1274 break;
1275 }
1276
1277 /* find channel */
1278 while (country_ie_len >= 3) {
1279 u8 first_channel = triplet->chans.first_channel;
1280
1281 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1282 goto next;
1283
1284 for (i = 0; i < triplet->chans.num_channels; i++) {
1285 if (first_channel + i * chan_increment == chan) {
1286 have_chan_pwr = true;
1287 *chan_pwr = triplet->chans.max_power;
1288 break;
1289 }
1290 }
1291 if (have_chan_pwr)
1292 break;
1293
1294 next:
1295 triplet++;
1296 country_ie_len -= 3;
1297 }
1298
1299 if (have_chan_pwr && pwr_constr_elem)
1300 *pwr_reduction = *pwr_constr_elem;
1301 else
1302 *pwr_reduction = 0;
1303
1304 return have_chan_pwr;
1305 }
1306
1307 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1308 struct ieee80211_channel *channel,
1309 const u8 *cisco_dtpc_ie,
1310 int *pwr_level)
1311 {
1312 /* From practical testing, the first data byte of the DTPC element
1313 * seems to contain the requested dBm level, and the CLI on Cisco
1314 * APs clearly state the range is -127 to 127 dBm, which indicates
1315 * a signed byte, although it seemingly never actually goes negative.
1316 * The other byte seems to always be zero.
1317 */
1318 *pwr_level = (__s8)cisco_dtpc_ie[4];
1319 }
1320
1321 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1322 struct ieee80211_channel *channel,
1323 struct ieee80211_mgmt *mgmt,
1324 const u8 *country_ie, u8 country_ie_len,
1325 const u8 *pwr_constr_ie,
1326 const u8 *cisco_dtpc_ie)
1327 {
1328 bool has_80211h_pwr = false, has_cisco_pwr = false;
1329 int chan_pwr = 0, pwr_reduction_80211h = 0;
1330 int pwr_level_cisco, pwr_level_80211h;
1331 int new_ap_level;
1332 __le16 capab = mgmt->u.probe_resp.capab_info;
1333
1334 if (country_ie &&
1335 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1336 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1337 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1338 sdata, channel, country_ie, country_ie_len,
1339 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1340 pwr_level_80211h =
1341 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1342 }
1343
1344 if (cisco_dtpc_ie) {
1345 ieee80211_find_cisco_dtpc(
1346 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1347 has_cisco_pwr = true;
1348 }
1349
1350 if (!has_80211h_pwr && !has_cisco_pwr)
1351 return 0;
1352
1353 /* If we have both 802.11h and Cisco DTPC, apply both limits
1354 * by picking the smallest of the two power levels advertised.
1355 */
1356 if (has_80211h_pwr &&
1357 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1358 new_ap_level = pwr_level_80211h;
1359
1360 if (sdata->ap_power_level == new_ap_level)
1361 return 0;
1362
1363 sdata_dbg(sdata,
1364 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1365 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1366 sdata->u.mgd.bssid);
1367 } else { /* has_cisco_pwr is always true here. */
1368 new_ap_level = pwr_level_cisco;
1369
1370 if (sdata->ap_power_level == new_ap_level)
1371 return 0;
1372
1373 sdata_dbg(sdata,
1374 "Limiting TX power to %d dBm as advertised by %pM\n",
1375 pwr_level_cisco, sdata->u.mgd.bssid);
1376 }
1377
1378 sdata->ap_power_level = new_ap_level;
1379 if (__ieee80211_recalc_txpower(sdata))
1380 return BSS_CHANGED_TXPOWER;
1381 return 0;
1382 }
1383
1384 /* powersave */
1385 static void ieee80211_enable_ps(struct ieee80211_local *local,
1386 struct ieee80211_sub_if_data *sdata)
1387 {
1388 struct ieee80211_conf *conf = &local->hw.conf;
1389
1390 /*
1391 * If we are scanning right now then the parameters will
1392 * take effect when scan finishes.
1393 */
1394 if (local->scanning)
1395 return;
1396
1397 if (conf->dynamic_ps_timeout > 0 &&
1398 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1399 mod_timer(&local->dynamic_ps_timer, jiffies +
1400 msecs_to_jiffies(conf->dynamic_ps_timeout));
1401 } else {
1402 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1403 ieee80211_send_nullfunc(local, sdata, true);
1404
1405 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1406 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1407 return;
1408
1409 conf->flags |= IEEE80211_CONF_PS;
1410 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1411 }
1412 }
1413
1414 static void ieee80211_change_ps(struct ieee80211_local *local)
1415 {
1416 struct ieee80211_conf *conf = &local->hw.conf;
1417
1418 if (local->ps_sdata) {
1419 ieee80211_enable_ps(local, local->ps_sdata);
1420 } else if (conf->flags & IEEE80211_CONF_PS) {
1421 conf->flags &= ~IEEE80211_CONF_PS;
1422 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1423 del_timer_sync(&local->dynamic_ps_timer);
1424 cancel_work_sync(&local->dynamic_ps_enable_work);
1425 }
1426 }
1427
1428 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1429 {
1430 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1431 struct sta_info *sta = NULL;
1432 bool authorized = false;
1433
1434 if (!mgd->powersave)
1435 return false;
1436
1437 if (mgd->broken_ap)
1438 return false;
1439
1440 if (!mgd->associated)
1441 return false;
1442
1443 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1444 return false;
1445
1446 if (!mgd->have_beacon)
1447 return false;
1448
1449 rcu_read_lock();
1450 sta = sta_info_get(sdata, mgd->bssid);
1451 if (sta)
1452 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1453 rcu_read_unlock();
1454
1455 return authorized;
1456 }
1457
1458 /* need to hold RTNL or interface lock */
1459 void ieee80211_recalc_ps(struct ieee80211_local *local)
1460 {
1461 struct ieee80211_sub_if_data *sdata, *found = NULL;
1462 int count = 0;
1463 int timeout;
1464
1465 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1466 local->ps_sdata = NULL;
1467 return;
1468 }
1469
1470 list_for_each_entry(sdata, &local->interfaces, list) {
1471 if (!ieee80211_sdata_running(sdata))
1472 continue;
1473 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1474 /* If an AP vif is found, then disable PS
1475 * by setting the count to zero thereby setting
1476 * ps_sdata to NULL.
1477 */
1478 count = 0;
1479 break;
1480 }
1481 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1482 continue;
1483 found = sdata;
1484 count++;
1485 }
1486
1487 if (count == 1 && ieee80211_powersave_allowed(found)) {
1488 u8 dtimper = found->u.mgd.dtim_period;
1489 s32 beaconint_us;
1490
1491 beaconint_us = ieee80211_tu_to_usec(
1492 found->vif.bss_conf.beacon_int);
1493
1494 timeout = local->dynamic_ps_forced_timeout;
1495 if (timeout < 0)
1496 timeout = 100;
1497 local->hw.conf.dynamic_ps_timeout = timeout;
1498
1499 /* If the TIM IE is invalid, pretend the value is 1 */
1500 if (!dtimper)
1501 dtimper = 1;
1502
1503 local->hw.conf.ps_dtim_period = dtimper;
1504 local->ps_sdata = found;
1505 } else {
1506 local->ps_sdata = NULL;
1507 }
1508
1509 ieee80211_change_ps(local);
1510 }
1511
1512 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1513 {
1514 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1515
1516 if (sdata->vif.bss_conf.ps != ps_allowed) {
1517 sdata->vif.bss_conf.ps = ps_allowed;
1518 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1519 }
1520 }
1521
1522 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1523 {
1524 struct ieee80211_local *local =
1525 container_of(work, struct ieee80211_local,
1526 dynamic_ps_disable_work);
1527
1528 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1529 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1530 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1531 }
1532
1533 ieee80211_wake_queues_by_reason(&local->hw,
1534 IEEE80211_MAX_QUEUE_MAP,
1535 IEEE80211_QUEUE_STOP_REASON_PS,
1536 false);
1537 }
1538
1539 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1540 {
1541 struct ieee80211_local *local =
1542 container_of(work, struct ieee80211_local,
1543 dynamic_ps_enable_work);
1544 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1545 struct ieee80211_if_managed *ifmgd;
1546 unsigned long flags;
1547 int q;
1548
1549 /* can only happen when PS was just disabled anyway */
1550 if (!sdata)
1551 return;
1552
1553 ifmgd = &sdata->u.mgd;
1554
1555 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1556 return;
1557
1558 if (local->hw.conf.dynamic_ps_timeout > 0) {
1559 /* don't enter PS if TX frames are pending */
1560 if (drv_tx_frames_pending(local)) {
1561 mod_timer(&local->dynamic_ps_timer, jiffies +
1562 msecs_to_jiffies(
1563 local->hw.conf.dynamic_ps_timeout));
1564 return;
1565 }
1566
1567 /*
1568 * transmission can be stopped by others which leads to
1569 * dynamic_ps_timer expiry. Postpone the ps timer if it
1570 * is not the actual idle state.
1571 */
1572 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1573 for (q = 0; q < local->hw.queues; q++) {
1574 if (local->queue_stop_reasons[q]) {
1575 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1576 flags);
1577 mod_timer(&local->dynamic_ps_timer, jiffies +
1578 msecs_to_jiffies(
1579 local->hw.conf.dynamic_ps_timeout));
1580 return;
1581 }
1582 }
1583 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1584 }
1585
1586 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1587 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1588 if (drv_tx_frames_pending(local)) {
1589 mod_timer(&local->dynamic_ps_timer, jiffies +
1590 msecs_to_jiffies(
1591 local->hw.conf.dynamic_ps_timeout));
1592 } else {
1593 ieee80211_send_nullfunc(local, sdata, true);
1594 /* Flush to get the tx status of nullfunc frame */
1595 ieee80211_flush_queues(local, sdata, false);
1596 }
1597 }
1598
1599 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1600 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1601 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1602 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1603 local->hw.conf.flags |= IEEE80211_CONF_PS;
1604 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1605 }
1606 }
1607
1608 void ieee80211_dynamic_ps_timer(unsigned long data)
1609 {
1610 struct ieee80211_local *local = (void *) data;
1611
1612 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1613 }
1614
1615 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1616 {
1617 struct delayed_work *delayed_work = to_delayed_work(work);
1618 struct ieee80211_sub_if_data *sdata =
1619 container_of(delayed_work, struct ieee80211_sub_if_data,
1620 dfs_cac_timer_work);
1621 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1622
1623 mutex_lock(&sdata->local->mtx);
1624 if (sdata->wdev.cac_started) {
1625 ieee80211_vif_release_channel(sdata);
1626 cfg80211_cac_event(sdata->dev, &chandef,
1627 NL80211_RADAR_CAC_FINISHED,
1628 GFP_KERNEL);
1629 }
1630 mutex_unlock(&sdata->local->mtx);
1631 }
1632
1633 static bool
1634 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1635 {
1636 struct ieee80211_local *local = sdata->local;
1637 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1638 bool ret = false;
1639 int ac;
1640
1641 if (local->hw.queues < IEEE80211_NUM_ACS)
1642 return false;
1643
1644 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1645 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1646 int non_acm_ac;
1647 unsigned long now = jiffies;
1648
1649 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1650 tx_tspec->admitted_time &&
1651 time_after(now, tx_tspec->time_slice_start + HZ)) {
1652 tx_tspec->consumed_tx_time = 0;
1653 tx_tspec->time_slice_start = now;
1654
1655 if (tx_tspec->downgraded)
1656 tx_tspec->action =
1657 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1658 }
1659
1660 switch (tx_tspec->action) {
1661 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1662 /* take the original parameters */
1663 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1664 sdata_err(sdata,
1665 "failed to set TX queue parameters for queue %d\n",
1666 ac);
1667 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1668 tx_tspec->downgraded = false;
1669 ret = true;
1670 break;
1671 case TX_TSPEC_ACTION_DOWNGRADE:
1672 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1673 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1674 ret = true;
1675 break;
1676 }
1677 /* downgrade next lower non-ACM AC */
1678 for (non_acm_ac = ac + 1;
1679 non_acm_ac < IEEE80211_NUM_ACS;
1680 non_acm_ac++)
1681 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1682 break;
1683 /* Usually the loop will result in using BK even if it
1684 * requires admission control, but such a configuration
1685 * makes no sense and we have to transmit somehow - the
1686 * AC selection does the same thing.
1687 * If we started out trying to downgrade from BK, then
1688 * the extra condition here might be needed.
1689 */
1690 if (non_acm_ac >= IEEE80211_NUM_ACS)
1691 non_acm_ac = IEEE80211_AC_BK;
1692 if (drv_conf_tx(local, sdata, ac,
1693 &sdata->tx_conf[non_acm_ac]))
1694 sdata_err(sdata,
1695 "failed to set TX queue parameters for queue %d\n",
1696 ac);
1697 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1698 ret = true;
1699 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1700 tx_tspec->time_slice_start + HZ - now + 1);
1701 break;
1702 case TX_TSPEC_ACTION_NONE:
1703 /* nothing now */
1704 break;
1705 }
1706 }
1707
1708 return ret;
1709 }
1710
1711 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1712 {
1713 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1714 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1715 }
1716
1717 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1718 {
1719 struct ieee80211_sub_if_data *sdata;
1720
1721 sdata = container_of(work, struct ieee80211_sub_if_data,
1722 u.mgd.tx_tspec_wk.work);
1723 ieee80211_sta_handle_tspec_ac_params(sdata);
1724 }
1725
1726 /* MLME */
1727 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1728 struct ieee80211_sub_if_data *sdata,
1729 const u8 *wmm_param, size_t wmm_param_len)
1730 {
1731 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1732 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1733 size_t left;
1734 int count, ac;
1735 const u8 *pos;
1736 u8 uapsd_queues = 0;
1737
1738 if (!local->ops->conf_tx)
1739 return false;
1740
1741 if (local->hw.queues < IEEE80211_NUM_ACS)
1742 return false;
1743
1744 if (!wmm_param)
1745 return false;
1746
1747 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1748 return false;
1749
1750 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1751 uapsd_queues = ifmgd->uapsd_queues;
1752
1753 count = wmm_param[6] & 0x0f;
1754 if (count == ifmgd->wmm_last_param_set)
1755 return false;
1756 ifmgd->wmm_last_param_set = count;
1757
1758 pos = wmm_param + 8;
1759 left = wmm_param_len - 8;
1760
1761 memset(&params, 0, sizeof(params));
1762
1763 sdata->wmm_acm = 0;
1764 for (; left >= 4; left -= 4, pos += 4) {
1765 int aci = (pos[0] >> 5) & 0x03;
1766 int acm = (pos[0] >> 4) & 0x01;
1767 bool uapsd = false;
1768
1769 switch (aci) {
1770 case 1: /* AC_BK */
1771 ac = IEEE80211_AC_BK;
1772 if (acm)
1773 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1774 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1775 uapsd = true;
1776 break;
1777 case 2: /* AC_VI */
1778 ac = IEEE80211_AC_VI;
1779 if (acm)
1780 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1781 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1782 uapsd = true;
1783 break;
1784 case 3: /* AC_VO */
1785 ac = IEEE80211_AC_VO;
1786 if (acm)
1787 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1788 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1789 uapsd = true;
1790 break;
1791 case 0: /* AC_BE */
1792 default:
1793 ac = IEEE80211_AC_BE;
1794 if (acm)
1795 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1796 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1797 uapsd = true;
1798 break;
1799 }
1800
1801 params[ac].aifs = pos[0] & 0x0f;
1802
1803 if (params[ac].aifs < 2) {
1804 sdata_info(sdata,
1805 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1806 params[ac].aifs, aci);
1807 params[ac].aifs = 2;
1808 }
1809 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1810 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1811 params[ac].txop = get_unaligned_le16(pos + 2);
1812 params[ac].acm = acm;
1813 params[ac].uapsd = uapsd;
1814
1815 if (params[ac].cw_min > params[ac].cw_max) {
1816 sdata_info(sdata,
1817 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1818 params[ac].cw_min, params[ac].cw_max, aci);
1819 return false;
1820 }
1821 }
1822
1823 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1824 mlme_dbg(sdata,
1825 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1826 ac, params[ac].acm,
1827 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1828 params[ac].txop, params[ac].uapsd,
1829 ifmgd->tx_tspec[ac].downgraded);
1830 sdata->tx_conf[ac] = params[ac];
1831 if (!ifmgd->tx_tspec[ac].downgraded &&
1832 drv_conf_tx(local, sdata, ac, &params[ac]))
1833 sdata_err(sdata,
1834 "failed to set TX queue parameters for AC %d\n",
1835 ac);
1836 }
1837
1838 /* enable WMM or activate new settings */
1839 sdata->vif.bss_conf.qos = true;
1840 return true;
1841 }
1842
1843 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1844 {
1845 lockdep_assert_held(&sdata->local->mtx);
1846
1847 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1848 ieee80211_run_deferred_scan(sdata->local);
1849 }
1850
1851 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1852 {
1853 mutex_lock(&sdata->local->mtx);
1854 __ieee80211_stop_poll(sdata);
1855 mutex_unlock(&sdata->local->mtx);
1856 }
1857
1858 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1859 u16 capab, bool erp_valid, u8 erp)
1860 {
1861 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1862 u32 changed = 0;
1863 bool use_protection;
1864 bool use_short_preamble;
1865 bool use_short_slot;
1866
1867 if (erp_valid) {
1868 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1869 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1870 } else {
1871 use_protection = false;
1872 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1873 }
1874
1875 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1876 if (ieee80211_get_sdata_band(sdata) == NL80211_BAND_5GHZ)
1877 use_short_slot = true;
1878
1879 if (use_protection != bss_conf->use_cts_prot) {
1880 bss_conf->use_cts_prot = use_protection;
1881 changed |= BSS_CHANGED_ERP_CTS_PROT;
1882 }
1883
1884 if (use_short_preamble != bss_conf->use_short_preamble) {
1885 bss_conf->use_short_preamble = use_short_preamble;
1886 changed |= BSS_CHANGED_ERP_PREAMBLE;
1887 }
1888
1889 if (use_short_slot != bss_conf->use_short_slot) {
1890 bss_conf->use_short_slot = use_short_slot;
1891 changed |= BSS_CHANGED_ERP_SLOT;
1892 }
1893
1894 return changed;
1895 }
1896
1897 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1898 struct cfg80211_bss *cbss,
1899 u32 bss_info_changed)
1900 {
1901 struct ieee80211_bss *bss = (void *)cbss->priv;
1902 struct ieee80211_local *local = sdata->local;
1903 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1904
1905 bss_info_changed |= BSS_CHANGED_ASSOC;
1906 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1907 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1908
1909 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1910 beacon_loss_count * bss_conf->beacon_int));
1911
1912 sdata->u.mgd.associated = cbss;
1913 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1914
1915 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1916
1917 if (sdata->vif.p2p ||
1918 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
1919 const struct cfg80211_bss_ies *ies;
1920
1921 rcu_read_lock();
1922 ies = rcu_dereference(cbss->ies);
1923 if (ies) {
1924 int ret;
1925
1926 ret = cfg80211_get_p2p_attr(
1927 ies->data, ies->len,
1928 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1929 (u8 *) &bss_conf->p2p_noa_attr,
1930 sizeof(bss_conf->p2p_noa_attr));
1931 if (ret >= 2) {
1932 sdata->u.mgd.p2p_noa_index =
1933 bss_conf->p2p_noa_attr.index;
1934 bss_info_changed |= BSS_CHANGED_P2P_PS;
1935 }
1936 }
1937 rcu_read_unlock();
1938 }
1939
1940 /* just to be sure */
1941 ieee80211_stop_poll(sdata);
1942
1943 ieee80211_led_assoc(local, 1);
1944
1945 if (sdata->u.mgd.have_beacon) {
1946 /*
1947 * If the AP is buggy we may get here with no DTIM period
1948 * known, so assume it's 1 which is the only safe assumption
1949 * in that case, although if the TIM IE is broken powersave
1950 * probably just won't work at all.
1951 */
1952 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1953 bss_conf->beacon_rate = bss->beacon_rate;
1954 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1955 } else {
1956 bss_conf->beacon_rate = NULL;
1957 bss_conf->dtim_period = 0;
1958 }
1959
1960 bss_conf->assoc = 1;
1961
1962 /* Tell the driver to monitor connection quality (if supported) */
1963 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1964 bss_conf->cqm_rssi_thold)
1965 bss_info_changed |= BSS_CHANGED_CQM;
1966
1967 /* Enable ARP filtering */
1968 if (bss_conf->arp_addr_cnt)
1969 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1970
1971 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1972
1973 mutex_lock(&local->iflist_mtx);
1974 ieee80211_recalc_ps(local);
1975 mutex_unlock(&local->iflist_mtx);
1976
1977 ieee80211_recalc_smps(sdata);
1978 ieee80211_recalc_ps_vif(sdata);
1979
1980 netif_carrier_on(sdata->dev);
1981 }
1982
1983 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1984 u16 stype, u16 reason, bool tx,
1985 u8 *frame_buf)
1986 {
1987 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1988 struct ieee80211_local *local = sdata->local;
1989 u32 changed = 0;
1990
1991 sdata_assert_lock(sdata);
1992
1993 if (WARN_ON_ONCE(tx && !frame_buf))
1994 return;
1995
1996 if (WARN_ON(!ifmgd->associated))
1997 return;
1998
1999 ieee80211_stop_poll(sdata);
2000
2001 ifmgd->associated = NULL;
2002 netif_carrier_off(sdata->dev);
2003
2004 /*
2005 * if we want to get out of ps before disassoc (why?) we have
2006 * to do it before sending disassoc, as otherwise the null-packet
2007 * won't be valid.
2008 */
2009 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2010 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2011 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2012 }
2013 local->ps_sdata = NULL;
2014
2015 /* disable per-vif ps */
2016 ieee80211_recalc_ps_vif(sdata);
2017
2018 /* make sure ongoing transmission finishes */
2019 synchronize_net();
2020
2021 /*
2022 * drop any frame before deauth/disassoc, this can be data or
2023 * management frame. Since we are disconnecting, we should not
2024 * insist sending these frames which can take time and delay
2025 * the disconnection and possible the roaming.
2026 */
2027 if (tx)
2028 ieee80211_flush_queues(local, sdata, true);
2029
2030 /* deauthenticate/disassociate now */
2031 if (tx || frame_buf)
2032 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2033 reason, tx, frame_buf);
2034
2035 /* flush out frame - make sure the deauth was actually sent */
2036 if (tx)
2037 ieee80211_flush_queues(local, sdata, false);
2038
2039 /* clear bssid only after building the needed mgmt frames */
2040 eth_zero_addr(ifmgd->bssid);
2041
2042 /* remove AP and TDLS peers */
2043 sta_info_flush(sdata);
2044
2045 /* finally reset all BSS / config parameters */
2046 changed |= ieee80211_reset_erp_info(sdata);
2047
2048 ieee80211_led_assoc(local, 0);
2049 changed |= BSS_CHANGED_ASSOC;
2050 sdata->vif.bss_conf.assoc = false;
2051
2052 ifmgd->p2p_noa_index = -1;
2053 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2054 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2055
2056 /* on the next assoc, re-program HT/VHT parameters */
2057 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2058 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2059 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2060 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2061
2062 /* reset MU-MIMO ownership and group data */
2063 memset(sdata->vif.bss_conf.mu_group.membership, 0,
2064 sizeof(sdata->vif.bss_conf.mu_group.membership));
2065 memset(sdata->vif.bss_conf.mu_group.position, 0,
2066 sizeof(sdata->vif.bss_conf.mu_group.position));
2067 changed |= BSS_CHANGED_MU_GROUPS;
2068 sdata->vif.mu_mimo_owner = false;
2069
2070 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2071
2072 del_timer_sync(&local->dynamic_ps_timer);
2073 cancel_work_sync(&local->dynamic_ps_enable_work);
2074
2075 /* Disable ARP filtering */
2076 if (sdata->vif.bss_conf.arp_addr_cnt)
2077 changed |= BSS_CHANGED_ARP_FILTER;
2078
2079 sdata->vif.bss_conf.qos = false;
2080 changed |= BSS_CHANGED_QOS;
2081
2082 /* The BSSID (not really interesting) and HT changed */
2083 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2084 ieee80211_bss_info_change_notify(sdata, changed);
2085
2086 /* disassociated - set to defaults now */
2087 ieee80211_set_wmm_default(sdata, false, false);
2088
2089 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2090 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2091 del_timer_sync(&sdata->u.mgd.timer);
2092 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2093
2094 sdata->vif.bss_conf.dtim_period = 0;
2095 sdata->vif.bss_conf.beacon_rate = NULL;
2096
2097 ifmgd->have_beacon = false;
2098
2099 ifmgd->flags = 0;
2100 mutex_lock(&local->mtx);
2101 ieee80211_vif_release_channel(sdata);
2102
2103 sdata->vif.csa_active = false;
2104 ifmgd->csa_waiting_bcn = false;
2105 ifmgd->csa_ignored_same_chan = false;
2106 if (sdata->csa_block_tx) {
2107 ieee80211_wake_vif_queues(local, sdata,
2108 IEEE80211_QUEUE_STOP_REASON_CSA);
2109 sdata->csa_block_tx = false;
2110 }
2111 mutex_unlock(&local->mtx);
2112
2113 /* existing TX TSPEC sessions no longer exist */
2114 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2115 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2116
2117 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2118 }
2119
2120 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2121 struct ieee80211_hdr *hdr)
2122 {
2123 /*
2124 * We can postpone the mgd.timer whenever receiving unicast frames
2125 * from AP because we know that the connection is working both ways
2126 * at that time. But multicast frames (and hence also beacons) must
2127 * be ignored here, because we need to trigger the timer during
2128 * data idle periods for sending the periodic probe request to the
2129 * AP we're connected to.
2130 */
2131 if (is_multicast_ether_addr(hdr->addr1))
2132 return;
2133
2134 ieee80211_sta_reset_conn_monitor(sdata);
2135 }
2136
2137 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2138 {
2139 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2140 struct ieee80211_local *local = sdata->local;
2141
2142 mutex_lock(&local->mtx);
2143 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2144 goto out;
2145
2146 __ieee80211_stop_poll(sdata);
2147
2148 mutex_lock(&local->iflist_mtx);
2149 ieee80211_recalc_ps(local);
2150 mutex_unlock(&local->iflist_mtx);
2151
2152 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2153 goto out;
2154
2155 /*
2156 * We've received a probe response, but are not sure whether
2157 * we have or will be receiving any beacons or data, so let's
2158 * schedule the timers again, just in case.
2159 */
2160 ieee80211_sta_reset_beacon_monitor(sdata);
2161
2162 mod_timer(&ifmgd->conn_mon_timer,
2163 round_jiffies_up(jiffies +
2164 IEEE80211_CONNECTION_IDLE_TIME));
2165 out:
2166 mutex_unlock(&local->mtx);
2167 }
2168
2169 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2170 struct ieee80211_hdr *hdr,
2171 u16 tx_time)
2172 {
2173 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2174 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2175 int ac = ieee80211_ac_from_tid(tid);
2176 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2177 unsigned long now = jiffies;
2178
2179 if (likely(!tx_tspec->admitted_time))
2180 return;
2181
2182 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2183 tx_tspec->consumed_tx_time = 0;
2184 tx_tspec->time_slice_start = now;
2185
2186 if (tx_tspec->downgraded) {
2187 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2188 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2189 }
2190 }
2191
2192 if (tx_tspec->downgraded)
2193 return;
2194
2195 tx_tspec->consumed_tx_time += tx_time;
2196
2197 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2198 tx_tspec->downgraded = true;
2199 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2200 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2201 }
2202 }
2203
2204 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2205 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2206 {
2207 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2208
2209 if (!ieee80211_is_data(hdr->frame_control))
2210 return;
2211
2212 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2213 sdata->u.mgd.probe_send_count > 0) {
2214 if (ack)
2215 ieee80211_sta_reset_conn_monitor(sdata);
2216 else
2217 sdata->u.mgd.nullfunc_failed = true;
2218 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2219 return;
2220 }
2221
2222 if (ack)
2223 ieee80211_sta_reset_conn_monitor(sdata);
2224 }
2225
2226 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2227 {
2228 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2229 const u8 *ssid;
2230 u8 *dst = ifmgd->associated->bssid;
2231 u8 unicast_limit = max(1, max_probe_tries - 3);
2232 struct sta_info *sta;
2233
2234 /*
2235 * Try sending broadcast probe requests for the last three
2236 * probe requests after the first ones failed since some
2237 * buggy APs only support broadcast probe requests.
2238 */
2239 if (ifmgd->probe_send_count >= unicast_limit)
2240 dst = NULL;
2241
2242 /*
2243 * When the hardware reports an accurate Tx ACK status, it's
2244 * better to send a nullfunc frame instead of a probe request,
2245 * as it will kick us off the AP quickly if we aren't associated
2246 * anymore. The timeout will be reset if the frame is ACKed by
2247 * the AP.
2248 */
2249 ifmgd->probe_send_count++;
2250
2251 if (dst) {
2252 mutex_lock(&sdata->local->sta_mtx);
2253 sta = sta_info_get(sdata, dst);
2254 if (!WARN_ON(!sta))
2255 ieee80211_check_fast_rx(sta);
2256 mutex_unlock(&sdata->local->sta_mtx);
2257 }
2258
2259 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2260 ifmgd->nullfunc_failed = false;
2261 ieee80211_send_nullfunc(sdata->local, sdata, false);
2262 } else {
2263 int ssid_len;
2264
2265 rcu_read_lock();
2266 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2267 if (WARN_ON_ONCE(ssid == NULL))
2268 ssid_len = 0;
2269 else
2270 ssid_len = ssid[1];
2271
2272 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2273 ssid + 2, ssid_len, NULL,
2274 0, (u32) -1, true, 0,
2275 ifmgd->associated->channel, false);
2276 rcu_read_unlock();
2277 }
2278
2279 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2280 run_again(sdata, ifmgd->probe_timeout);
2281 }
2282
2283 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2284 bool beacon)
2285 {
2286 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2287 bool already = false;
2288
2289 if (!ieee80211_sdata_running(sdata))
2290 return;
2291
2292 sdata_lock(sdata);
2293
2294 if (!ifmgd->associated)
2295 goto out;
2296
2297 mutex_lock(&sdata->local->mtx);
2298
2299 if (sdata->local->tmp_channel || sdata->local->scanning) {
2300 mutex_unlock(&sdata->local->mtx);
2301 goto out;
2302 }
2303
2304 if (beacon) {
2305 mlme_dbg_ratelimited(sdata,
2306 "detected beacon loss from AP (missed %d beacons) - probing\n",
2307 beacon_loss_count);
2308
2309 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2310 }
2311
2312 /*
2313 * The driver/our work has already reported this event or the
2314 * connection monitoring has kicked in and we have already sent
2315 * a probe request. Or maybe the AP died and the driver keeps
2316 * reporting until we disassociate...
2317 *
2318 * In either case we have to ignore the current call to this
2319 * function (except for setting the correct probe reason bit)
2320 * because otherwise we would reset the timer every time and
2321 * never check whether we received a probe response!
2322 */
2323 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2324 already = true;
2325
2326 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2327
2328 mutex_unlock(&sdata->local->mtx);
2329
2330 if (already)
2331 goto out;
2332
2333 mutex_lock(&sdata->local->iflist_mtx);
2334 ieee80211_recalc_ps(sdata->local);
2335 mutex_unlock(&sdata->local->iflist_mtx);
2336
2337 ifmgd->probe_send_count = 0;
2338 ieee80211_mgd_probe_ap_send(sdata);
2339 out:
2340 sdata_unlock(sdata);
2341 }
2342
2343 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2344 struct ieee80211_vif *vif)
2345 {
2346 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2347 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2348 struct cfg80211_bss *cbss;
2349 struct sk_buff *skb;
2350 const u8 *ssid;
2351 int ssid_len;
2352
2353 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2354 return NULL;
2355
2356 sdata_assert_lock(sdata);
2357
2358 if (ifmgd->associated)
2359 cbss = ifmgd->associated;
2360 else if (ifmgd->auth_data)
2361 cbss = ifmgd->auth_data->bss;
2362 else if (ifmgd->assoc_data)
2363 cbss = ifmgd->assoc_data->bss;
2364 else
2365 return NULL;
2366
2367 rcu_read_lock();
2368 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2369 if (WARN_ON_ONCE(ssid == NULL))
2370 ssid_len = 0;
2371 else
2372 ssid_len = ssid[1];
2373
2374 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2375 (u32) -1, cbss->channel,
2376 ssid + 2, ssid_len,
2377 NULL, 0, true);
2378 rcu_read_unlock();
2379
2380 return skb;
2381 }
2382 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2383
2384 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2385 const u8 *buf, size_t len, bool tx,
2386 u16 reason)
2387 {
2388 struct ieee80211_event event = {
2389 .type = MLME_EVENT,
2390 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2391 .u.mlme.reason = reason,
2392 };
2393
2394 if (tx)
2395 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2396 else
2397 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2398
2399 drv_event_callback(sdata->local, sdata, &event);
2400 }
2401
2402 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2403 {
2404 struct ieee80211_local *local = sdata->local;
2405 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2406 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2407
2408 sdata_lock(sdata);
2409 if (!ifmgd->associated) {
2410 sdata_unlock(sdata);
2411 return;
2412 }
2413
2414 /* AP is probably out of range (or not reachable for another reason) so
2415 * remove the bss struct for that AP.
2416 */
2417 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2418
2419 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2420 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2421 true, frame_buf);
2422 mutex_lock(&local->mtx);
2423 sdata->vif.csa_active = false;
2424 ifmgd->csa_waiting_bcn = false;
2425 if (sdata->csa_block_tx) {
2426 ieee80211_wake_vif_queues(local, sdata,
2427 IEEE80211_QUEUE_STOP_REASON_CSA);
2428 sdata->csa_block_tx = false;
2429 }
2430 mutex_unlock(&local->mtx);
2431
2432 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2433 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2434
2435 sdata_unlock(sdata);
2436 }
2437
2438 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2439 {
2440 struct ieee80211_sub_if_data *sdata =
2441 container_of(work, struct ieee80211_sub_if_data,
2442 u.mgd.beacon_connection_loss_work);
2443 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2444
2445 if (ifmgd->associated)
2446 ifmgd->beacon_loss_count++;
2447
2448 if (ifmgd->connection_loss) {
2449 sdata_info(sdata, "Connection to AP %pM lost\n",
2450 ifmgd->bssid);
2451 __ieee80211_disconnect(sdata);
2452 } else {
2453 ieee80211_mgd_probe_ap(sdata, true);
2454 }
2455 }
2456
2457 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2458 {
2459 struct ieee80211_sub_if_data *sdata =
2460 container_of(work, struct ieee80211_sub_if_data,
2461 u.mgd.csa_connection_drop_work);
2462
2463 __ieee80211_disconnect(sdata);
2464 }
2465
2466 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2467 {
2468 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2469 struct ieee80211_hw *hw = &sdata->local->hw;
2470
2471 trace_api_beacon_loss(sdata);
2472
2473 sdata->u.mgd.connection_loss = false;
2474 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2475 }
2476 EXPORT_SYMBOL(ieee80211_beacon_loss);
2477
2478 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2479 {
2480 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2481 struct ieee80211_hw *hw = &sdata->local->hw;
2482
2483 trace_api_connection_loss(sdata);
2484
2485 sdata->u.mgd.connection_loss = true;
2486 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2487 }
2488 EXPORT_SYMBOL(ieee80211_connection_loss);
2489
2490
2491 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2492 bool assoc)
2493 {
2494 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2495
2496 sdata_assert_lock(sdata);
2497
2498 if (!assoc) {
2499 /*
2500 * we are not authenticated yet, the only timer that could be
2501 * running is the timeout for the authentication response which
2502 * which is not relevant anymore.
2503 */
2504 del_timer_sync(&sdata->u.mgd.timer);
2505 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2506
2507 eth_zero_addr(sdata->u.mgd.bssid);
2508 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2509 sdata->u.mgd.flags = 0;
2510 mutex_lock(&sdata->local->mtx);
2511 ieee80211_vif_release_channel(sdata);
2512 mutex_unlock(&sdata->local->mtx);
2513 }
2514
2515 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2516 kfree(auth_data);
2517 sdata->u.mgd.auth_data = NULL;
2518 }
2519
2520 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2521 bool assoc)
2522 {
2523 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2524
2525 sdata_assert_lock(sdata);
2526
2527 if (!assoc) {
2528 /*
2529 * we are not associated yet, the only timer that could be
2530 * running is the timeout for the association response which
2531 * which is not relevant anymore.
2532 */
2533 del_timer_sync(&sdata->u.mgd.timer);
2534 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2535
2536 eth_zero_addr(sdata->u.mgd.bssid);
2537 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2538 sdata->u.mgd.flags = 0;
2539 sdata->vif.mu_mimo_owner = false;
2540
2541 mutex_lock(&sdata->local->mtx);
2542 ieee80211_vif_release_channel(sdata);
2543 mutex_unlock(&sdata->local->mtx);
2544 }
2545
2546 kfree(assoc_data);
2547 sdata->u.mgd.assoc_data = NULL;
2548 }
2549
2550 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2551 struct ieee80211_mgmt *mgmt, size_t len)
2552 {
2553 struct ieee80211_local *local = sdata->local;
2554 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2555 u8 *pos;
2556 struct ieee802_11_elems elems;
2557 u32 tx_flags = 0;
2558
2559 pos = mgmt->u.auth.variable;
2560 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2561 if (!elems.challenge)
2562 return;
2563 auth_data->expected_transaction = 4;
2564 drv_mgd_prepare_tx(sdata->local, sdata);
2565 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2566 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2567 IEEE80211_TX_INTFL_MLME_CONN_TX;
2568 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2569 elems.challenge - 2, elems.challenge_len + 2,
2570 auth_data->bss->bssid, auth_data->bss->bssid,
2571 auth_data->key, auth_data->key_len,
2572 auth_data->key_idx, tx_flags);
2573 }
2574
2575 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2576 struct ieee80211_mgmt *mgmt, size_t len)
2577 {
2578 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2579 u8 bssid[ETH_ALEN];
2580 u16 auth_alg, auth_transaction, status_code;
2581 struct sta_info *sta;
2582 struct ieee80211_event event = {
2583 .type = MLME_EVENT,
2584 .u.mlme.data = AUTH_EVENT,
2585 };
2586
2587 sdata_assert_lock(sdata);
2588
2589 if (len < 24 + 6)
2590 return;
2591
2592 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2593 return;
2594
2595 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2596
2597 if (!ether_addr_equal(bssid, mgmt->bssid))
2598 return;
2599
2600 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2601 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2602 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2603
2604 if (auth_alg != ifmgd->auth_data->algorithm ||
2605 auth_transaction != ifmgd->auth_data->expected_transaction) {
2606 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2607 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2608 auth_transaction,
2609 ifmgd->auth_data->expected_transaction);
2610 return;
2611 }
2612
2613 if (status_code != WLAN_STATUS_SUCCESS) {
2614 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2615 mgmt->sa, status_code);
2616 ieee80211_destroy_auth_data(sdata, false);
2617 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2618 event.u.mlme.status = MLME_DENIED;
2619 event.u.mlme.reason = status_code;
2620 drv_event_callback(sdata->local, sdata, &event);
2621 return;
2622 }
2623
2624 switch (ifmgd->auth_data->algorithm) {
2625 case WLAN_AUTH_OPEN:
2626 case WLAN_AUTH_LEAP:
2627 case WLAN_AUTH_FT:
2628 case WLAN_AUTH_SAE:
2629 case WLAN_AUTH_FILS_SK:
2630 case WLAN_AUTH_FILS_SK_PFS:
2631 case WLAN_AUTH_FILS_PK:
2632 break;
2633 case WLAN_AUTH_SHARED_KEY:
2634 if (ifmgd->auth_data->expected_transaction != 4) {
2635 ieee80211_auth_challenge(sdata, mgmt, len);
2636 /* need another frame */
2637 return;
2638 }
2639 break;
2640 default:
2641 WARN_ONCE(1, "invalid auth alg %d",
2642 ifmgd->auth_data->algorithm);
2643 return;
2644 }
2645
2646 event.u.mlme.status = MLME_SUCCESS;
2647 drv_event_callback(sdata->local, sdata, &event);
2648 sdata_info(sdata, "authenticated\n");
2649 ifmgd->auth_data->done = true;
2650 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2651 ifmgd->auth_data->timeout_started = true;
2652 run_again(sdata, ifmgd->auth_data->timeout);
2653
2654 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2655 ifmgd->auth_data->expected_transaction != 2) {
2656 /*
2657 * Report auth frame to user space for processing since another
2658 * round of Authentication frames is still needed.
2659 */
2660 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2661 return;
2662 }
2663
2664 /* move station state to auth */
2665 mutex_lock(&sdata->local->sta_mtx);
2666 sta = sta_info_get(sdata, bssid);
2667 if (!sta) {
2668 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2669 goto out_err;
2670 }
2671 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2672 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2673 goto out_err;
2674 }
2675 mutex_unlock(&sdata->local->sta_mtx);
2676
2677 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2678 return;
2679 out_err:
2680 mutex_unlock(&sdata->local->sta_mtx);
2681 /* ignore frame -- wait for timeout */
2682 }
2683
2684 #define case_WLAN(type) \
2685 case WLAN_REASON_##type: return #type
2686
2687 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2688 {
2689 switch (reason_code) {
2690 case_WLAN(UNSPECIFIED);
2691 case_WLAN(PREV_AUTH_NOT_VALID);
2692 case_WLAN(DEAUTH_LEAVING);
2693 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2694 case_WLAN(DISASSOC_AP_BUSY);
2695 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2696 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2697 case_WLAN(DISASSOC_STA_HAS_LEFT);
2698 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2699 case_WLAN(DISASSOC_BAD_POWER);
2700 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2701 case_WLAN(INVALID_IE);
2702 case_WLAN(MIC_FAILURE);
2703 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2704 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2705 case_WLAN(IE_DIFFERENT);
2706 case_WLAN(INVALID_GROUP_CIPHER);
2707 case_WLAN(INVALID_PAIRWISE_CIPHER);
2708 case_WLAN(INVALID_AKMP);
2709 case_WLAN(UNSUPP_RSN_VERSION);
2710 case_WLAN(INVALID_RSN_IE_CAP);
2711 case_WLAN(IEEE8021X_FAILED);
2712 case_WLAN(CIPHER_SUITE_REJECTED);
2713 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2714 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2715 case_WLAN(DISASSOC_LOW_ACK);
2716 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2717 case_WLAN(QSTA_LEAVE_QBSS);
2718 case_WLAN(QSTA_NOT_USE);
2719 case_WLAN(QSTA_REQUIRE_SETUP);
2720 case_WLAN(QSTA_TIMEOUT);
2721 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2722 case_WLAN(MESH_PEER_CANCELED);
2723 case_WLAN(MESH_MAX_PEERS);
2724 case_WLAN(MESH_CONFIG);
2725 case_WLAN(MESH_CLOSE);
2726 case_WLAN(MESH_MAX_RETRIES);
2727 case_WLAN(MESH_CONFIRM_TIMEOUT);
2728 case_WLAN(MESH_INVALID_GTK);
2729 case_WLAN(MESH_INCONSISTENT_PARAM);
2730 case_WLAN(MESH_INVALID_SECURITY);
2731 case_WLAN(MESH_PATH_ERROR);
2732 case_WLAN(MESH_PATH_NOFORWARD);
2733 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2734 case_WLAN(MAC_EXISTS_IN_MBSS);
2735 case_WLAN(MESH_CHAN_REGULATORY);
2736 case_WLAN(MESH_CHAN);
2737 default: return "<unknown>";
2738 }
2739 }
2740
2741 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2742 struct ieee80211_mgmt *mgmt, size_t len)
2743 {
2744 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2745 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2746
2747 sdata_assert_lock(sdata);
2748
2749 if (len < 24 + 2)
2750 return;
2751
2752 if (ifmgd->associated &&
2753 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2754 const u8 *bssid = ifmgd->associated->bssid;
2755
2756 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2757 bssid, reason_code,
2758 ieee80211_get_reason_code_string(reason_code));
2759
2760 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2761
2762 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2763 reason_code);
2764 return;
2765 }
2766
2767 if (ifmgd->assoc_data &&
2768 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2769 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2770
2771 sdata_info(sdata,
2772 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2773 bssid, reason_code,
2774 ieee80211_get_reason_code_string(reason_code));
2775
2776 ieee80211_destroy_assoc_data(sdata, false);
2777
2778 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2779 return;
2780 }
2781 }
2782
2783
2784 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2785 struct ieee80211_mgmt *mgmt, size_t len)
2786 {
2787 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2788 u16 reason_code;
2789
2790 sdata_assert_lock(sdata);
2791
2792 if (len < 24 + 2)
2793 return;
2794
2795 if (!ifmgd->associated ||
2796 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2797 return;
2798
2799 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2800
2801 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2802 mgmt->sa, reason_code);
2803
2804 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2805
2806 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2807 }
2808
2809 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2810 u8 *supp_rates, unsigned int supp_rates_len,
2811 u32 *rates, u32 *basic_rates,
2812 bool *have_higher_than_11mbit,
2813 int *min_rate, int *min_rate_index,
2814 int shift, u32 rate_flags)
2815 {
2816 int i, j;
2817
2818 for (i = 0; i < supp_rates_len; i++) {
2819 int rate = supp_rates[i] & 0x7f;
2820 bool is_basic = !!(supp_rates[i] & 0x80);
2821
2822 if ((rate * 5 * (1 << shift)) > 110)
2823 *have_higher_than_11mbit = true;
2824
2825 /*
2826 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2827 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2828 *
2829 * Note: Even through the membership selector and the basic
2830 * rate flag share the same bit, they are not exactly
2831 * the same.
2832 */
2833 if (!!(supp_rates[i] & 0x80) &&
2834 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2835 continue;
2836
2837 for (j = 0; j < sband->n_bitrates; j++) {
2838 struct ieee80211_rate *br;
2839 int brate;
2840
2841 br = &sband->bitrates[j];
2842 if ((rate_flags & br->flags) != rate_flags)
2843 continue;
2844
2845 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2846 if (brate == rate) {
2847 *rates |= BIT(j);
2848 if (is_basic)
2849 *basic_rates |= BIT(j);
2850 if ((rate * 5) < *min_rate) {
2851 *min_rate = rate * 5;
2852 *min_rate_index = j;
2853 }
2854 break;
2855 }
2856 }
2857 }
2858 }
2859
2860 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2861 struct cfg80211_bss *cbss,
2862 struct ieee80211_mgmt *mgmt, size_t len)
2863 {
2864 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2865 struct ieee80211_local *local = sdata->local;
2866 struct ieee80211_supported_band *sband;
2867 struct sta_info *sta;
2868 u8 *pos;
2869 u16 capab_info, aid;
2870 struct ieee802_11_elems elems;
2871 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2872 const struct cfg80211_bss_ies *bss_ies = NULL;
2873 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2874 u32 changed = 0;
2875 int err;
2876 bool ret;
2877
2878 /* AssocResp and ReassocResp have identical structure */
2879
2880 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2881 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2882
2883 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2884 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2885 aid);
2886 aid &= ~(BIT(15) | BIT(14));
2887
2888 ifmgd->broken_ap = false;
2889
2890 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2891 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2892 aid);
2893 aid = 0;
2894 ifmgd->broken_ap = true;
2895 }
2896
2897 pos = mgmt->u.assoc_resp.variable;
2898 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2899
2900 if (!elems.supp_rates) {
2901 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2902 return false;
2903 }
2904
2905 ifmgd->aid = aid;
2906 ifmgd->tdls_chan_switch_prohibited =
2907 elems.ext_capab && elems.ext_capab_len >= 5 &&
2908 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2909
2910 /*
2911 * Some APs are erroneously not including some information in their
2912 * (re)association response frames. Try to recover by using the data
2913 * from the beacon or probe response. This seems to afflict mobile
2914 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2915 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2916 */
2917 if ((assoc_data->wmm && !elems.wmm_param) ||
2918 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2919 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2920 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2921 (!elems.vht_cap_elem || !elems.vht_operation))) {
2922 const struct cfg80211_bss_ies *ies;
2923 struct ieee802_11_elems bss_elems;
2924
2925 rcu_read_lock();
2926 ies = rcu_dereference(cbss->ies);
2927 if (ies)
2928 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2929 GFP_ATOMIC);
2930 rcu_read_unlock();
2931 if (!bss_ies)
2932 return false;
2933
2934 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2935 false, &bss_elems);
2936 if (assoc_data->wmm &&
2937 !elems.wmm_param && bss_elems.wmm_param) {
2938 elems.wmm_param = bss_elems.wmm_param;
2939 sdata_info(sdata,
2940 "AP bug: WMM param missing from AssocResp\n");
2941 }
2942
2943 /*
2944 * Also check if we requested HT/VHT, otherwise the AP doesn't
2945 * have to include the IEs in the (re)association response.
2946 */
2947 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2948 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2949 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2950 sdata_info(sdata,
2951 "AP bug: HT capability missing from AssocResp\n");
2952 }
2953 if (!elems.ht_operation && bss_elems.ht_operation &&
2954 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2955 elems.ht_operation = bss_elems.ht_operation;
2956 sdata_info(sdata,
2957 "AP bug: HT operation missing from AssocResp\n");
2958 }
2959 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2960 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2961 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2962 sdata_info(sdata,
2963 "AP bug: VHT capa missing from AssocResp\n");
2964 }
2965 if (!elems.vht_operation && bss_elems.vht_operation &&
2966 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2967 elems.vht_operation = bss_elems.vht_operation;
2968 sdata_info(sdata,
2969 "AP bug: VHT operation missing from AssocResp\n");
2970 }
2971 }
2972
2973 /*
2974 * We previously checked these in the beacon/probe response, so
2975 * they should be present here. This is just a safety net.
2976 */
2977 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2978 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2979 sdata_info(sdata,
2980 "HT AP is missing WMM params or HT capability/operation\n");
2981 ret = false;
2982 goto out;
2983 }
2984
2985 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2986 (!elems.vht_cap_elem || !elems.vht_operation)) {
2987 sdata_info(sdata,
2988 "VHT AP is missing VHT capability/operation\n");
2989 ret = false;
2990 goto out;
2991 }
2992
2993 mutex_lock(&sdata->local->sta_mtx);
2994 /*
2995 * station info was already allocated and inserted before
2996 * the association and should be available to us
2997 */
2998 sta = sta_info_get(sdata, cbss->bssid);
2999 if (WARN_ON(!sta)) {
3000 mutex_unlock(&sdata->local->sta_mtx);
3001 ret = false;
3002 goto out;
3003 }
3004
3005 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
3006
3007 /* Set up internal HT/VHT capabilities */
3008 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3009 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3010 elems.ht_cap_elem, sta);
3011
3012 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3013 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3014 elems.vht_cap_elem, sta);
3015
3016 /*
3017 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3018 * in their association response, so ignore that data for our own
3019 * configuration. If it changed since the last beacon, we'll get the
3020 * next beacon and update then.
3021 */
3022
3023 /*
3024 * If an operating mode notification IE is present, override the
3025 * NSS calculation (that would be done in rate_control_rate_init())
3026 * and use the # of streams from that element.
3027 */
3028 if (elems.opmode_notif &&
3029 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3030 u8 nss;
3031
3032 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3033 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3034 nss += 1;
3035 sta->sta.rx_nss = nss;
3036 }
3037
3038 rate_control_rate_init(sta);
3039
3040 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3041 set_sta_flag(sta, WLAN_STA_MFP);
3042 sta->sta.mfp = true;
3043 } else {
3044 sta->sta.mfp = false;
3045 }
3046
3047 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3048
3049 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3050 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3051 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3052 if (err) {
3053 sdata_info(sdata,
3054 "failed to move station %pM to desired state\n",
3055 sta->sta.addr);
3056 WARN_ON(__sta_info_destroy(sta));
3057 mutex_unlock(&sdata->local->sta_mtx);
3058 ret = false;
3059 goto out;
3060 }
3061
3062 mutex_unlock(&sdata->local->sta_mtx);
3063
3064 /*
3065 * Always handle WMM once after association regardless
3066 * of the first value the AP uses. Setting -1 here has
3067 * that effect because the AP values is an unsigned
3068 * 4-bit value.
3069 */
3070 ifmgd->wmm_last_param_set = -1;
3071
3072 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3073 ieee80211_set_wmm_default(sdata, false, false);
3074 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3075 elems.wmm_param_len)) {
3076 /* still enable QoS since we might have HT/VHT */
3077 ieee80211_set_wmm_default(sdata, false, true);
3078 /* set the disable-WMM flag in this case to disable
3079 * tracking WMM parameter changes in the beacon if
3080 * the parameters weren't actually valid. Doing so
3081 * avoids changing parameters very strangely when
3082 * the AP is going back and forth between valid and
3083 * invalid parameters.
3084 */
3085 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3086 }
3087 changed |= BSS_CHANGED_QOS;
3088
3089 /* set AID and assoc capability,
3090 * ieee80211_set_associated() will tell the driver */
3091 bss_conf->aid = aid;
3092 bss_conf->assoc_capability = capab_info;
3093 ieee80211_set_associated(sdata, cbss, changed);
3094
3095 /*
3096 * If we're using 4-addr mode, let the AP know that we're
3097 * doing so, so that it can create the STA VLAN on its side
3098 */
3099 if (ifmgd->use_4addr)
3100 ieee80211_send_4addr_nullfunc(local, sdata);
3101
3102 /*
3103 * Start timer to probe the connection to the AP now.
3104 * Also start the timer that will detect beacon loss.
3105 */
3106 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3107 ieee80211_sta_reset_beacon_monitor(sdata);
3108
3109 ret = true;
3110 out:
3111 kfree(bss_ies);
3112 return ret;
3113 }
3114
3115 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3116 struct ieee80211_mgmt *mgmt,
3117 size_t len)
3118 {
3119 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3120 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3121 u16 capab_info, status_code, aid;
3122 struct ieee802_11_elems elems;
3123 int ac, uapsd_queues = -1;
3124 u8 *pos;
3125 bool reassoc;
3126 struct cfg80211_bss *bss;
3127 struct ieee80211_event event = {
3128 .type = MLME_EVENT,
3129 .u.mlme.data = ASSOC_EVENT,
3130 };
3131
3132 sdata_assert_lock(sdata);
3133
3134 if (!assoc_data)
3135 return;
3136 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3137 return;
3138
3139 /*
3140 * AssocResp and ReassocResp have identical structure, so process both
3141 * of them in this function.
3142 */
3143
3144 if (len < 24 + 6)
3145 return;
3146
3147 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3148 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3149 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3150 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3151
3152 sdata_info(sdata,
3153 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3154 reassoc ? "Rea" : "A", mgmt->sa,
3155 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3156
3157 if (assoc_data->fils_kek_len &&
3158 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3159 return;
3160
3161 pos = mgmt->u.assoc_resp.variable;
3162 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3163
3164 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3165 elems.timeout_int &&
3166 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3167 u32 tu, ms;
3168 tu = le32_to_cpu(elems.timeout_int->value);
3169 ms = tu * 1024 / 1000;
3170 sdata_info(sdata,
3171 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3172 mgmt->sa, tu, ms);
3173 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3174 assoc_data->timeout_started = true;
3175 if (ms > IEEE80211_ASSOC_TIMEOUT)
3176 run_again(sdata, assoc_data->timeout);
3177 return;
3178 }
3179
3180 bss = assoc_data->bss;
3181
3182 if (status_code != WLAN_STATUS_SUCCESS) {
3183 sdata_info(sdata, "%pM denied association (code=%d)\n",
3184 mgmt->sa, status_code);
3185 ieee80211_destroy_assoc_data(sdata, false);
3186 event.u.mlme.status = MLME_DENIED;
3187 event.u.mlme.reason = status_code;
3188 drv_event_callback(sdata->local, sdata, &event);
3189 } else {
3190 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3191 /* oops -- internal error -- send timeout for now */
3192 ieee80211_destroy_assoc_data(sdata, false);
3193 cfg80211_assoc_timeout(sdata->dev, bss);
3194 return;
3195 }
3196 event.u.mlme.status = MLME_SUCCESS;
3197 drv_event_callback(sdata->local, sdata, &event);
3198 sdata_info(sdata, "associated\n");
3199
3200 /*
3201 * destroy assoc_data afterwards, as otherwise an idle
3202 * recalc after assoc_data is NULL but before associated
3203 * is set can cause the interface to go idle
3204 */
3205 ieee80211_destroy_assoc_data(sdata, true);
3206
3207 /* get uapsd queues configuration */
3208 uapsd_queues = 0;
3209 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3210 if (sdata->tx_conf[ac].uapsd)
3211 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3212 }
3213
3214 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3215 }
3216
3217 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3218 struct ieee80211_mgmt *mgmt, size_t len,
3219 struct ieee80211_rx_status *rx_status,
3220 struct ieee802_11_elems *elems)
3221 {
3222 struct ieee80211_local *local = sdata->local;
3223 struct ieee80211_bss *bss;
3224 struct ieee80211_channel *channel;
3225
3226 sdata_assert_lock(sdata);
3227
3228 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3229 if (!channel)
3230 return;
3231
3232 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3233 channel);
3234 if (bss) {
3235 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3236 ieee80211_rx_bss_put(local, bss);
3237 }
3238 }
3239
3240
3241 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3242 struct sk_buff *skb)
3243 {
3244 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3245 struct ieee80211_if_managed *ifmgd;
3246 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3247 size_t baselen, len = skb->len;
3248 struct ieee802_11_elems elems;
3249
3250 ifmgd = &sdata->u.mgd;
3251
3252 sdata_assert_lock(sdata);
3253
3254 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3255 return; /* ignore ProbeResp to foreign address */
3256
3257 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3258 if (baselen > len)
3259 return;
3260
3261 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3262 false, &elems);
3263
3264 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3265
3266 if (ifmgd->associated &&
3267 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3268 ieee80211_reset_ap_probe(sdata);
3269 }
3270
3271 /*
3272 * This is the canonical list of information elements we care about,
3273 * the filter code also gives us all changes to the Microsoft OUI
3274 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3275 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3276 * changes to requested client power.
3277 *
3278 * We implement beacon filtering in software since that means we can
3279 * avoid processing the frame here and in cfg80211, and userspace
3280 * will not be able to tell whether the hardware supports it or not.
3281 *
3282 * XXX: This list needs to be dynamic -- userspace needs to be able to
3283 * add items it requires. It also needs to be able to tell us to
3284 * look out for other vendor IEs.
3285 */
3286 static const u64 care_about_ies =
3287 (1ULL << WLAN_EID_COUNTRY) |
3288 (1ULL << WLAN_EID_ERP_INFO) |
3289 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3290 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3291 (1ULL << WLAN_EID_HT_CAPABILITY) |
3292 (1ULL << WLAN_EID_HT_OPERATION) |
3293 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3294
3295 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3296 struct ieee80211_mgmt *mgmt, size_t len,
3297 struct ieee80211_rx_status *rx_status)
3298 {
3299 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3300 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3301 size_t baselen;
3302 struct ieee802_11_elems elems;
3303 struct ieee80211_local *local = sdata->local;
3304 struct ieee80211_chanctx_conf *chanctx_conf;
3305 struct ieee80211_channel *chan;
3306 struct sta_info *sta;
3307 u32 changed = 0;
3308 bool erp_valid;
3309 u8 erp_value = 0;
3310 u32 ncrc;
3311 u8 *bssid;
3312 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3313
3314 sdata_assert_lock(sdata);
3315
3316 /* Process beacon from the current BSS */
3317 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3318 if (baselen > len)
3319 return;
3320
3321 rcu_read_lock();
3322 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3323 if (!chanctx_conf) {
3324 rcu_read_unlock();
3325 return;
3326 }
3327
3328 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3329 rcu_read_unlock();
3330 return;
3331 }
3332 chan = chanctx_conf->def.chan;
3333 rcu_read_unlock();
3334
3335 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3336 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3337 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3338 len - baselen, false, &elems);
3339
3340 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3341 if (elems.tim && !elems.parse_error) {
3342 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3343 ifmgd->dtim_period = tim_ie->dtim_period;
3344 }
3345 ifmgd->have_beacon = true;
3346 ifmgd->assoc_data->need_beacon = false;
3347 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3348 sdata->vif.bss_conf.sync_tsf =
3349 le64_to_cpu(mgmt->u.beacon.timestamp);
3350 sdata->vif.bss_conf.sync_device_ts =
3351 rx_status->device_timestamp;
3352 if (elems.tim)
3353 sdata->vif.bss_conf.sync_dtim_count =
3354 elems.tim->dtim_count;
3355 else
3356 sdata->vif.bss_conf.sync_dtim_count = 0;
3357 }
3358 /* continue assoc process */
3359 ifmgd->assoc_data->timeout = jiffies;
3360 ifmgd->assoc_data->timeout_started = true;
3361 run_again(sdata, ifmgd->assoc_data->timeout);
3362 return;
3363 }
3364
3365 if (!ifmgd->associated ||
3366 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3367 return;
3368 bssid = ifmgd->associated->bssid;
3369
3370 /* Track average RSSI from the Beacon frames of the current AP */
3371 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3372 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3373 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3374 ifmgd->last_cqm_event_signal = 0;
3375 ifmgd->count_beacon_signal = 1;
3376 ifmgd->last_ave_beacon_signal = 0;
3377 } else {
3378 ifmgd->count_beacon_signal++;
3379 }
3380
3381 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3382
3383 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3384 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3385 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3386 int last_sig = ifmgd->last_ave_beacon_signal;
3387 struct ieee80211_event event = {
3388 .type = RSSI_EVENT,
3389 };
3390
3391 /*
3392 * if signal crosses either of the boundaries, invoke callback
3393 * with appropriate parameters
3394 */
3395 if (sig > ifmgd->rssi_max_thold &&
3396 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3397 ifmgd->last_ave_beacon_signal = sig;
3398 event.u.rssi.data = RSSI_EVENT_HIGH;
3399 drv_event_callback(local, sdata, &event);
3400 } else if (sig < ifmgd->rssi_min_thold &&
3401 (last_sig >= ifmgd->rssi_max_thold ||
3402 last_sig == 0)) {
3403 ifmgd->last_ave_beacon_signal = sig;
3404 event.u.rssi.data = RSSI_EVENT_LOW;
3405 drv_event_callback(local, sdata, &event);
3406 }
3407 }
3408
3409 if (bss_conf->cqm_rssi_thold &&
3410 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3411 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3412 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3413 int last_event = ifmgd->last_cqm_event_signal;
3414 int thold = bss_conf->cqm_rssi_thold;
3415 int hyst = bss_conf->cqm_rssi_hyst;
3416
3417 if (sig < thold &&
3418 (last_event == 0 || sig < last_event - hyst)) {
3419 ifmgd->last_cqm_event_signal = sig;
3420 ieee80211_cqm_rssi_notify(
3421 &sdata->vif,
3422 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3423 GFP_KERNEL);
3424 } else if (sig > thold &&
3425 (last_event == 0 || sig > last_event + hyst)) {
3426 ifmgd->last_cqm_event_signal = sig;
3427 ieee80211_cqm_rssi_notify(
3428 &sdata->vif,
3429 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3430 GFP_KERNEL);
3431 }
3432 }
3433
3434 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3435 mlme_dbg_ratelimited(sdata,
3436 "cancelling AP probe due to a received beacon\n");
3437 ieee80211_reset_ap_probe(sdata);
3438 }
3439
3440 /*
3441 * Push the beacon loss detection into the future since
3442 * we are processing a beacon from the AP just now.
3443 */
3444 ieee80211_sta_reset_beacon_monitor(sdata);
3445
3446 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3447 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3448 len - baselen, false, &elems,
3449 care_about_ies, ncrc);
3450
3451 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3452 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3453 if (local->hw.conf.dynamic_ps_timeout > 0) {
3454 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3455 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3456 ieee80211_hw_config(local,
3457 IEEE80211_CONF_CHANGE_PS);
3458 }
3459 ieee80211_send_nullfunc(local, sdata, false);
3460 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3461 local->pspolling = true;
3462
3463 /*
3464 * Here is assumed that the driver will be
3465 * able to send ps-poll frame and receive a
3466 * response even though power save mode is
3467 * enabled, but some drivers might require
3468 * to disable power save here. This needs
3469 * to be investigated.
3470 */
3471 ieee80211_send_pspoll(local, sdata);
3472 }
3473 }
3474
3475 if (sdata->vif.p2p ||
3476 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3477 struct ieee80211_p2p_noa_attr noa = {};
3478 int ret;
3479
3480 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3481 len - baselen,
3482 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3483 (u8 *) &noa, sizeof(noa));
3484 if (ret >= 2) {
3485 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3486 /* valid noa_attr and index changed */
3487 sdata->u.mgd.p2p_noa_index = noa.index;
3488 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3489 changed |= BSS_CHANGED_P2P_PS;
3490 /*
3491 * make sure we update all information, the CRC
3492 * mechanism doesn't look at P2P attributes.
3493 */
3494 ifmgd->beacon_crc_valid = false;
3495 }
3496 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3497 /* noa_attr not found and we had valid noa_attr before */
3498 sdata->u.mgd.p2p_noa_index = -1;
3499 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3500 changed |= BSS_CHANGED_P2P_PS;
3501 ifmgd->beacon_crc_valid = false;
3502 }
3503 }
3504
3505 if (ifmgd->csa_waiting_bcn)
3506 ieee80211_chswitch_post_beacon(sdata);
3507
3508 /*
3509 * Update beacon timing and dtim count on every beacon appearance. This
3510 * will allow the driver to use the most updated values. Do it before
3511 * comparing this one with last received beacon.
3512 * IMPORTANT: These parameters would possibly be out of sync by the time
3513 * the driver will use them. The synchronized view is currently
3514 * guaranteed only in certain callbacks.
3515 */
3516 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3517 sdata->vif.bss_conf.sync_tsf =
3518 le64_to_cpu(mgmt->u.beacon.timestamp);
3519 sdata->vif.bss_conf.sync_device_ts =
3520 rx_status->device_timestamp;
3521 if (elems.tim)
3522 sdata->vif.bss_conf.sync_dtim_count =
3523 elems.tim->dtim_count;
3524 else
3525 sdata->vif.bss_conf.sync_dtim_count = 0;
3526 }
3527
3528 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3529 return;
3530 ifmgd->beacon_crc = ncrc;
3531 ifmgd->beacon_crc_valid = true;
3532
3533 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3534
3535 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3536 rx_status->device_timestamp,
3537 &elems, true);
3538
3539 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3540 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3541 elems.wmm_param_len))
3542 changed |= BSS_CHANGED_QOS;
3543
3544 /*
3545 * If we haven't had a beacon before, tell the driver about the
3546 * DTIM period (and beacon timing if desired) now.
3547 */
3548 if (!ifmgd->have_beacon) {
3549 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3550 if (elems.tim)
3551 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3552 else
3553 bss_conf->dtim_period = 1;
3554
3555 changed |= BSS_CHANGED_BEACON_INFO;
3556 ifmgd->have_beacon = true;
3557
3558 mutex_lock(&local->iflist_mtx);
3559 ieee80211_recalc_ps(local);
3560 mutex_unlock(&local->iflist_mtx);
3561
3562 ieee80211_recalc_ps_vif(sdata);
3563 }
3564
3565 if (elems.erp_info) {
3566 erp_valid = true;
3567 erp_value = elems.erp_info[0];
3568 } else {
3569 erp_valid = false;
3570 }
3571 changed |= ieee80211_handle_bss_capability(sdata,
3572 le16_to_cpu(mgmt->u.beacon.capab_info),
3573 erp_valid, erp_value);
3574
3575 mutex_lock(&local->sta_mtx);
3576 sta = sta_info_get(sdata, bssid);
3577
3578 if (ieee80211_config_bw(sdata, sta,
3579 elems.ht_cap_elem, elems.ht_operation,
3580 elems.vht_operation, bssid, &changed)) {
3581 mutex_unlock(&local->sta_mtx);
3582 sdata_info(sdata,
3583 "failed to follow AP %pM bandwidth change, disconnect\n",
3584 bssid);
3585 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3586 WLAN_REASON_DEAUTH_LEAVING,
3587 true, deauth_buf);
3588 ieee80211_report_disconnect(sdata, deauth_buf,
3589 sizeof(deauth_buf), true,
3590 WLAN_REASON_DEAUTH_LEAVING);
3591 return;
3592 }
3593
3594 if (sta && elems.opmode_notif)
3595 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3596 rx_status->band);
3597 mutex_unlock(&local->sta_mtx);
3598
3599 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3600 elems.country_elem,
3601 elems.country_elem_len,
3602 elems.pwr_constr_elem,
3603 elems.cisco_dtpc_elem);
3604
3605 ieee80211_bss_info_change_notify(sdata, changed);
3606 }
3607
3608 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3609 struct sk_buff *skb)
3610 {
3611 struct ieee80211_rx_status *rx_status;
3612 struct ieee80211_mgmt *mgmt;
3613 u16 fc;
3614 struct ieee802_11_elems elems;
3615 int ies_len;
3616
3617 rx_status = (struct ieee80211_rx_status *) skb->cb;
3618 mgmt = (struct ieee80211_mgmt *) skb->data;
3619 fc = le16_to_cpu(mgmt->frame_control);
3620
3621 sdata_lock(sdata);
3622
3623 switch (fc & IEEE80211_FCTL_STYPE) {
3624 case IEEE80211_STYPE_BEACON:
3625 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3626 break;
3627 case IEEE80211_STYPE_PROBE_RESP:
3628 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3629 break;
3630 case IEEE80211_STYPE_AUTH:
3631 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3632 break;
3633 case IEEE80211_STYPE_DEAUTH:
3634 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3635 break;
3636 case IEEE80211_STYPE_DISASSOC:
3637 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3638 break;
3639 case IEEE80211_STYPE_ASSOC_RESP:
3640 case IEEE80211_STYPE_REASSOC_RESP:
3641 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3642 break;
3643 case IEEE80211_STYPE_ACTION:
3644 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3645 ies_len = skb->len -
3646 offsetof(struct ieee80211_mgmt,
3647 u.action.u.chan_switch.variable);
3648
3649 if (ies_len < 0)
3650 break;
3651
3652 ieee802_11_parse_elems(
3653 mgmt->u.action.u.chan_switch.variable,
3654 ies_len, true, &elems);
3655
3656 if (elems.parse_error)
3657 break;
3658
3659 ieee80211_sta_process_chanswitch(sdata,
3660 rx_status->mactime,
3661 rx_status->device_timestamp,
3662 &elems, false);
3663 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3664 ies_len = skb->len -
3665 offsetof(struct ieee80211_mgmt,
3666 u.action.u.ext_chan_switch.variable);
3667
3668 if (ies_len < 0)
3669 break;
3670
3671 ieee802_11_parse_elems(
3672 mgmt->u.action.u.ext_chan_switch.variable,
3673 ies_len, true, &elems);
3674
3675 if (elems.parse_error)
3676 break;
3677
3678 /* for the handling code pretend this was also an IE */
3679 elems.ext_chansw_ie =
3680 &mgmt->u.action.u.ext_chan_switch.data;
3681
3682 ieee80211_sta_process_chanswitch(sdata,
3683 rx_status->mactime,
3684 rx_status->device_timestamp,
3685 &elems, false);
3686 }
3687 break;
3688 }
3689 sdata_unlock(sdata);
3690 }
3691
3692 static void ieee80211_sta_timer(unsigned long data)
3693 {
3694 struct ieee80211_sub_if_data *sdata =
3695 (struct ieee80211_sub_if_data *) data;
3696
3697 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3698 }
3699
3700 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3701 u8 *bssid, u8 reason, bool tx)
3702 {
3703 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3704
3705 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3706 tx, frame_buf);
3707
3708 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3709 reason);
3710 }
3711
3712 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3713 {
3714 struct ieee80211_local *local = sdata->local;
3715 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3716 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3717 u32 tx_flags = 0;
3718 u16 trans = 1;
3719 u16 status = 0;
3720
3721 sdata_assert_lock(sdata);
3722
3723 if (WARN_ON_ONCE(!auth_data))
3724 return -EINVAL;
3725
3726 auth_data->tries++;
3727
3728 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3729 sdata_info(sdata, "authentication with %pM timed out\n",
3730 auth_data->bss->bssid);
3731
3732 /*
3733 * Most likely AP is not in the range so remove the
3734 * bss struct for that AP.
3735 */
3736 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3737
3738 return -ETIMEDOUT;
3739 }
3740
3741 drv_mgd_prepare_tx(local, sdata);
3742
3743 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3744 auth_data->bss->bssid, auth_data->tries,
3745 IEEE80211_AUTH_MAX_TRIES);
3746
3747 auth_data->expected_transaction = 2;
3748
3749 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3750 trans = auth_data->sae_trans;
3751 status = auth_data->sae_status;
3752 auth_data->expected_transaction = trans;
3753 }
3754
3755 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3756 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3757 IEEE80211_TX_INTFL_MLME_CONN_TX;
3758
3759 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3760 auth_data->data, auth_data->data_len,
3761 auth_data->bss->bssid,
3762 auth_data->bss->bssid, NULL, 0, 0,
3763 tx_flags);
3764
3765 if (tx_flags == 0) {
3766 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3767 auth_data->timeout_started = true;
3768 run_again(sdata, auth_data->timeout);
3769 } else {
3770 auth_data->timeout =
3771 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3772 auth_data->timeout_started = true;
3773 run_again(sdata, auth_data->timeout);
3774 }
3775
3776 return 0;
3777 }
3778
3779 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3780 {
3781 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3782 struct ieee80211_local *local = sdata->local;
3783
3784 sdata_assert_lock(sdata);
3785
3786 assoc_data->tries++;
3787 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3788 sdata_info(sdata, "association with %pM timed out\n",
3789 assoc_data->bss->bssid);
3790
3791 /*
3792 * Most likely AP is not in the range so remove the
3793 * bss struct for that AP.
3794 */
3795 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3796
3797 return -ETIMEDOUT;
3798 }
3799
3800 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3801 assoc_data->bss->bssid, assoc_data->tries,
3802 IEEE80211_ASSOC_MAX_TRIES);
3803 ieee80211_send_assoc(sdata);
3804
3805 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3806 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3807 assoc_data->timeout_started = true;
3808 run_again(sdata, assoc_data->timeout);
3809 } else {
3810 assoc_data->timeout =
3811 round_jiffies_up(jiffies +
3812 IEEE80211_ASSOC_TIMEOUT_LONG);
3813 assoc_data->timeout_started = true;
3814 run_again(sdata, assoc_data->timeout);
3815 }
3816
3817 return 0;
3818 }
3819
3820 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3821 __le16 fc, bool acked)
3822 {
3823 struct ieee80211_local *local = sdata->local;
3824
3825 sdata->u.mgd.status_fc = fc;
3826 sdata->u.mgd.status_acked = acked;
3827 sdata->u.mgd.status_received = true;
3828
3829 ieee80211_queue_work(&local->hw, &sdata->work);
3830 }
3831
3832 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3833 {
3834 struct ieee80211_local *local = sdata->local;
3835 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3836
3837 sdata_lock(sdata);
3838
3839 if (ifmgd->status_received) {
3840 __le16 fc = ifmgd->status_fc;
3841 bool status_acked = ifmgd->status_acked;
3842
3843 ifmgd->status_received = false;
3844 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3845 if (status_acked) {
3846 ifmgd->auth_data->timeout =
3847 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3848 run_again(sdata, ifmgd->auth_data->timeout);
3849 } else {
3850 ifmgd->auth_data->timeout = jiffies - 1;
3851 }
3852 ifmgd->auth_data->timeout_started = true;
3853 } else if (ifmgd->assoc_data &&
3854 (ieee80211_is_assoc_req(fc) ||
3855 ieee80211_is_reassoc_req(fc))) {
3856 if (status_acked) {
3857 ifmgd->assoc_data->timeout =
3858 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3859 run_again(sdata, ifmgd->assoc_data->timeout);
3860 } else {
3861 ifmgd->assoc_data->timeout = jiffies - 1;
3862 }
3863 ifmgd->assoc_data->timeout_started = true;
3864 }
3865 }
3866
3867 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3868 time_after(jiffies, ifmgd->auth_data->timeout)) {
3869 if (ifmgd->auth_data->done) {
3870 /*
3871 * ok ... we waited for assoc but userspace didn't,
3872 * so let's just kill the auth data
3873 */
3874 ieee80211_destroy_auth_data(sdata, false);
3875 } else if (ieee80211_auth(sdata)) {
3876 u8 bssid[ETH_ALEN];
3877 struct ieee80211_event event = {
3878 .type = MLME_EVENT,
3879 .u.mlme.data = AUTH_EVENT,
3880 .u.mlme.status = MLME_TIMEOUT,
3881 };
3882
3883 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3884
3885 ieee80211_destroy_auth_data(sdata, false);
3886
3887 cfg80211_auth_timeout(sdata->dev, bssid);
3888 drv_event_callback(sdata->local, sdata, &event);
3889 }
3890 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3891 run_again(sdata, ifmgd->auth_data->timeout);
3892
3893 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3894 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3895 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3896 ieee80211_do_assoc(sdata)) {
3897 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3898 struct ieee80211_event event = {
3899 .type = MLME_EVENT,
3900 .u.mlme.data = ASSOC_EVENT,
3901 .u.mlme.status = MLME_TIMEOUT,
3902 };
3903
3904 ieee80211_destroy_assoc_data(sdata, false);
3905 cfg80211_assoc_timeout(sdata->dev, bss);
3906 drv_event_callback(sdata->local, sdata, &event);
3907 }
3908 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3909 run_again(sdata, ifmgd->assoc_data->timeout);
3910
3911 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3912 ifmgd->associated) {
3913 u8 bssid[ETH_ALEN];
3914 int max_tries;
3915
3916 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3917
3918 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3919 max_tries = max_nullfunc_tries;
3920 else
3921 max_tries = max_probe_tries;
3922
3923 /* ACK received for nullfunc probing frame */
3924 if (!ifmgd->probe_send_count)
3925 ieee80211_reset_ap_probe(sdata);
3926 else if (ifmgd->nullfunc_failed) {
3927 if (ifmgd->probe_send_count < max_tries) {
3928 mlme_dbg(sdata,
3929 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3930 bssid, ifmgd->probe_send_count,
3931 max_tries);
3932 ieee80211_mgd_probe_ap_send(sdata);
3933 } else {
3934 mlme_dbg(sdata,
3935 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3936 bssid);
3937 ieee80211_sta_connection_lost(sdata, bssid,
3938 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3939 false);
3940 }
3941 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3942 run_again(sdata, ifmgd->probe_timeout);
3943 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3944 mlme_dbg(sdata,
3945 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3946 bssid, probe_wait_ms);
3947 ieee80211_sta_connection_lost(sdata, bssid,
3948 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3949 } else if (ifmgd->probe_send_count < max_tries) {
3950 mlme_dbg(sdata,
3951 "No probe response from AP %pM after %dms, try %d/%i\n",
3952 bssid, probe_wait_ms,
3953 ifmgd->probe_send_count, max_tries);
3954 ieee80211_mgd_probe_ap_send(sdata);
3955 } else {
3956 /*
3957 * We actually lost the connection ... or did we?
3958 * Let's make sure!
3959 */
3960 mlme_dbg(sdata,
3961 "No probe response from AP %pM after %dms, disconnecting.\n",
3962 bssid, probe_wait_ms);
3963
3964 ieee80211_sta_connection_lost(sdata, bssid,
3965 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3966 }
3967 }
3968
3969 sdata_unlock(sdata);
3970 }
3971
3972 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3973 {
3974 struct ieee80211_sub_if_data *sdata =
3975 (struct ieee80211_sub_if_data *) data;
3976 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3977
3978 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3979 return;
3980
3981 sdata->u.mgd.connection_loss = false;
3982 ieee80211_queue_work(&sdata->local->hw,
3983 &sdata->u.mgd.beacon_connection_loss_work);
3984 }
3985
3986 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3987 {
3988 struct ieee80211_sub_if_data *sdata =
3989 (struct ieee80211_sub_if_data *) data;
3990 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3991 struct ieee80211_local *local = sdata->local;
3992
3993 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3994 return;
3995
3996 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3997 }
3998
3999 static void ieee80211_sta_monitor_work(struct work_struct *work)
4000 {
4001 struct ieee80211_sub_if_data *sdata =
4002 container_of(work, struct ieee80211_sub_if_data,
4003 u.mgd.monitor_work);
4004
4005 ieee80211_mgd_probe_ap(sdata, false);
4006 }
4007
4008 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4009 {
4010 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4011 __ieee80211_stop_poll(sdata);
4012
4013 /* let's probe the connection once */
4014 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4015 ieee80211_queue_work(&sdata->local->hw,
4016 &sdata->u.mgd.monitor_work);
4017 }
4018 }
4019
4020 #ifdef CONFIG_PM
4021 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4022 {
4023 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4024 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4025
4026 sdata_lock(sdata);
4027
4028 if (ifmgd->auth_data || ifmgd->assoc_data) {
4029 const u8 *bssid = ifmgd->auth_data ?
4030 ifmgd->auth_data->bss->bssid :
4031 ifmgd->assoc_data->bss->bssid;
4032
4033 /*
4034 * If we are trying to authenticate / associate while suspending,
4035 * cfg80211 won't know and won't actually abort those attempts,
4036 * thus we need to do that ourselves.
4037 */
4038 ieee80211_send_deauth_disassoc(sdata, bssid,
4039 IEEE80211_STYPE_DEAUTH,
4040 WLAN_REASON_DEAUTH_LEAVING,
4041 false, frame_buf);
4042 if (ifmgd->assoc_data)
4043 ieee80211_destroy_assoc_data(sdata, false);
4044 if (ifmgd->auth_data)
4045 ieee80211_destroy_auth_data(sdata, false);
4046 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4047 IEEE80211_DEAUTH_FRAME_LEN);
4048 }
4049
4050 /* This is a bit of a hack - we should find a better and more generic
4051 * solution to this. Normally when suspending, cfg80211 will in fact
4052 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4053 * auth (not so important) or assoc (this is the problem) process.
4054 *
4055 * As a consequence, it can happen that we are in the process of both
4056 * associating and suspending, and receive an association response
4057 * after cfg80211 has checked if it needs to disconnect, but before
4058 * we actually set the flag to drop incoming frames. This will then
4059 * cause the workqueue flush to process the association response in
4060 * the suspend, resulting in a successful association just before it
4061 * tries to remove the interface from the driver, which now though
4062 * has a channel context assigned ... this results in issues.
4063 *
4064 * To work around this (for now) simply deauth here again if we're
4065 * now connected.
4066 */
4067 if (ifmgd->associated && !sdata->local->wowlan) {
4068 u8 bssid[ETH_ALEN];
4069 struct cfg80211_deauth_request req = {
4070 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4071 .bssid = bssid,
4072 };
4073
4074 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4075 ieee80211_mgd_deauth(sdata, &req);
4076 }
4077
4078 sdata_unlock(sdata);
4079 }
4080
4081 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4082 {
4083 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4084
4085 sdata_lock(sdata);
4086 if (!ifmgd->associated) {
4087 sdata_unlock(sdata);
4088 return;
4089 }
4090
4091 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4092 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4093 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4094 ieee80211_sta_connection_lost(sdata,
4095 ifmgd->associated->bssid,
4096 WLAN_REASON_UNSPECIFIED,
4097 true);
4098 sdata_unlock(sdata);
4099 return;
4100 }
4101 sdata_unlock(sdata);
4102 }
4103 #endif
4104
4105 /* interface setup */
4106 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4107 {
4108 struct ieee80211_if_managed *ifmgd;
4109
4110 ifmgd = &sdata->u.mgd;
4111 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4112 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4113 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4114 ieee80211_beacon_connection_loss_work);
4115 INIT_WORK(&ifmgd->csa_connection_drop_work,
4116 ieee80211_csa_connection_drop_work);
4117 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4118 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4119 ieee80211_tdls_peer_del_work);
4120 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4121 (unsigned long) sdata);
4122 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4123 (unsigned long) sdata);
4124 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4125 (unsigned long) sdata);
4126 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4127 (unsigned long) sdata);
4128 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4129 ieee80211_sta_handle_tspec_ac_params_wk);
4130
4131 ifmgd->flags = 0;
4132 ifmgd->powersave = sdata->wdev.ps;
4133 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4134 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4135 ifmgd->p2p_noa_index = -1;
4136
4137 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4138 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4139 else
4140 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4141
4142 /* Setup TDLS data */
4143 spin_lock_init(&ifmgd->teardown_lock);
4144 ifmgd->teardown_skb = NULL;
4145 ifmgd->orig_teardown_skb = NULL;
4146 }
4147
4148 /* scan finished notification */
4149 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4150 {
4151 struct ieee80211_sub_if_data *sdata;
4152
4153 /* Restart STA timers */
4154 rcu_read_lock();
4155 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4156 if (ieee80211_sdata_running(sdata))
4157 ieee80211_restart_sta_timer(sdata);
4158 }
4159 rcu_read_unlock();
4160 }
4161
4162 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4163 struct cfg80211_bss *cbss)
4164 {
4165 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4166 const u8 *ht_cap_ie, *vht_cap_ie;
4167 const struct ieee80211_ht_cap *ht_cap;
4168 const struct ieee80211_vht_cap *vht_cap;
4169 u8 chains = 1;
4170
4171 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4172 return chains;
4173
4174 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4175 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4176 ht_cap = (void *)(ht_cap_ie + 2);
4177 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4178 /*
4179 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4180 * "Tx Unequal Modulation Supported" fields.
4181 */
4182 }
4183
4184 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4185 return chains;
4186
4187 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4188 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4189 u8 nss;
4190 u16 tx_mcs_map;
4191
4192 vht_cap = (void *)(vht_cap_ie + 2);
4193 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4194 for (nss = 8; nss > 0; nss--) {
4195 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4196 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4197 break;
4198 }
4199 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4200 chains = max(chains, nss);
4201 }
4202
4203 return chains;
4204 }
4205
4206 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4207 struct cfg80211_bss *cbss)
4208 {
4209 struct ieee80211_local *local = sdata->local;
4210 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4211 const struct ieee80211_ht_cap *ht_cap = NULL;
4212 const struct ieee80211_ht_operation *ht_oper = NULL;
4213 const struct ieee80211_vht_operation *vht_oper = NULL;
4214 struct ieee80211_supported_band *sband;
4215 struct cfg80211_chan_def chandef;
4216 int ret;
4217 u32 i;
4218 bool have_80mhz;
4219
4220 sband = local->hw.wiphy->bands[cbss->channel->band];
4221
4222 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4223 IEEE80211_STA_DISABLE_80P80MHZ |
4224 IEEE80211_STA_DISABLE_160MHZ);
4225
4226 rcu_read_lock();
4227
4228 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4229 sband->ht_cap.ht_supported) {
4230 const u8 *ht_oper_ie, *ht_cap_ie;
4231
4232 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4233 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4234 ht_oper = (void *)(ht_oper_ie + 2);
4235
4236 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4237 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4238 ht_cap = (void *)(ht_cap_ie + 2);
4239
4240 if (!ht_cap) {
4241 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4242 ht_oper = NULL;
4243 }
4244 }
4245
4246 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4247 sband->vht_cap.vht_supported) {
4248 const u8 *vht_oper_ie, *vht_cap;
4249
4250 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4251 WLAN_EID_VHT_OPERATION);
4252 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4253 vht_oper = (void *)(vht_oper_ie + 2);
4254 if (vht_oper && !ht_oper) {
4255 vht_oper = NULL;
4256 sdata_info(sdata,
4257 "AP advertised VHT without HT, disabling both\n");
4258 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4259 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4260 }
4261
4262 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4263 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4264 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4265 vht_oper = NULL;
4266 }
4267 }
4268
4269 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4270 have_80mhz = false;
4271 for (i = 0; i < sband->n_channels; i++) {
4272 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4273 IEEE80211_CHAN_NO_80MHZ))
4274 continue;
4275
4276 have_80mhz = true;
4277 break;
4278 }
4279
4280 if (!have_80mhz)
4281 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4282
4283 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4284 cbss->channel,
4285 ht_cap, ht_oper, vht_oper,
4286 &chandef, false);
4287
4288 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4289 local->rx_chains);
4290
4291 rcu_read_unlock();
4292
4293 /* will change later if needed */
4294 sdata->smps_mode = IEEE80211_SMPS_OFF;
4295
4296 mutex_lock(&local->mtx);
4297 /*
4298 * If this fails (possibly due to channel context sharing
4299 * on incompatible channels, e.g. 80+80 and 160 sharing the
4300 * same control channel) try to use a smaller bandwidth.
4301 */
4302 ret = ieee80211_vif_use_channel(sdata, &chandef,
4303 IEEE80211_CHANCTX_SHARED);
4304
4305 /* don't downgrade for 5 and 10 MHz channels, though. */
4306 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4307 chandef.width == NL80211_CHAN_WIDTH_10)
4308 goto out;
4309
4310 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4311 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4312 ret = ieee80211_vif_use_channel(sdata, &chandef,
4313 IEEE80211_CHANCTX_SHARED);
4314 }
4315 out:
4316 mutex_unlock(&local->mtx);
4317 return ret;
4318 }
4319
4320 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4321 struct cfg80211_bss *cbss, bool assoc,
4322 bool override)
4323 {
4324 struct ieee80211_local *local = sdata->local;
4325 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4326 struct ieee80211_bss *bss = (void *)cbss->priv;
4327 struct sta_info *new_sta = NULL;
4328 struct ieee80211_supported_band *sband;
4329 bool have_sta = false;
4330 int err;
4331
4332 sband = local->hw.wiphy->bands[cbss->channel->band];
4333
4334 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4335 return -EINVAL;
4336
4337 if (assoc) {
4338 rcu_read_lock();
4339 have_sta = sta_info_get(sdata, cbss->bssid);
4340 rcu_read_unlock();
4341 }
4342
4343 if (!have_sta) {
4344 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4345 if (!new_sta)
4346 return -ENOMEM;
4347 }
4348
4349 if (new_sta || override) {
4350 err = ieee80211_prep_channel(sdata, cbss);
4351 if (err) {
4352 if (new_sta)
4353 sta_info_free(local, new_sta);
4354 return -EINVAL;
4355 }
4356 }
4357
4358 if (new_sta) {
4359 u32 rates = 0, basic_rates = 0;
4360 bool have_higher_than_11mbit;
4361 int min_rate = INT_MAX, min_rate_index = -1;
4362 struct ieee80211_chanctx_conf *chanctx_conf;
4363 const struct cfg80211_bss_ies *ies;
4364 int shift = ieee80211_vif_get_shift(&sdata->vif);
4365 u32 rate_flags;
4366
4367 rcu_read_lock();
4368 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4369 if (WARN_ON(!chanctx_conf)) {
4370 rcu_read_unlock();
4371 sta_info_free(local, new_sta);
4372 return -EINVAL;
4373 }
4374 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4375 rcu_read_unlock();
4376
4377 ieee80211_get_rates(sband, bss->supp_rates,
4378 bss->supp_rates_len,
4379 &rates, &basic_rates,
4380 &have_higher_than_11mbit,
4381 &min_rate, &min_rate_index,
4382 shift, rate_flags);
4383
4384 /*
4385 * This used to be a workaround for basic rates missing
4386 * in the association response frame. Now that we no
4387 * longer use the basic rates from there, it probably
4388 * doesn't happen any more, but keep the workaround so
4389 * in case some *other* APs are buggy in different ways
4390 * we can connect -- with a warning.
4391 */
4392 if (!basic_rates && min_rate_index >= 0) {
4393 sdata_info(sdata,
4394 "No basic rates, using min rate instead\n");
4395 basic_rates = BIT(min_rate_index);
4396 }
4397
4398 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4399 sdata->vif.bss_conf.basic_rates = basic_rates;
4400
4401 /* cf. IEEE 802.11 9.2.12 */
4402 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4403 have_higher_than_11mbit)
4404 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4405 else
4406 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4407
4408 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4409
4410 /* set timing information */
4411 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4412 rcu_read_lock();
4413 ies = rcu_dereference(cbss->beacon_ies);
4414 if (ies) {
4415 const u8 *tim_ie;
4416
4417 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4418 sdata->vif.bss_conf.sync_device_ts =
4419 bss->device_ts_beacon;
4420 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4421 ies->data, ies->len);
4422 if (tim_ie && tim_ie[1] >= 2)
4423 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4424 else
4425 sdata->vif.bss_conf.sync_dtim_count = 0;
4426 } else if (!ieee80211_hw_check(&sdata->local->hw,
4427 TIMING_BEACON_ONLY)) {
4428 ies = rcu_dereference(cbss->proberesp_ies);
4429 /* must be non-NULL since beacon IEs were NULL */
4430 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4431 sdata->vif.bss_conf.sync_device_ts =
4432 bss->device_ts_presp;
4433 sdata->vif.bss_conf.sync_dtim_count = 0;
4434 } else {
4435 sdata->vif.bss_conf.sync_tsf = 0;
4436 sdata->vif.bss_conf.sync_device_ts = 0;
4437 sdata->vif.bss_conf.sync_dtim_count = 0;
4438 }
4439 rcu_read_unlock();
4440
4441 /* tell driver about BSSID, basic rates and timing */
4442 ieee80211_bss_info_change_notify(sdata,
4443 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4444 BSS_CHANGED_BEACON_INT);
4445
4446 if (assoc)
4447 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4448
4449 err = sta_info_insert(new_sta);
4450 new_sta = NULL;
4451 if (err) {
4452 sdata_info(sdata,
4453 "failed to insert STA entry for the AP (error %d)\n",
4454 err);
4455 return err;
4456 }
4457 } else
4458 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4459
4460 /* Cancel scan to ensure that nothing interferes with connection */
4461 if (local->scanning)
4462 ieee80211_scan_cancel(local);
4463
4464 return 0;
4465 }
4466
4467 /* config hooks */
4468 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4469 struct cfg80211_auth_request *req)
4470 {
4471 struct ieee80211_local *local = sdata->local;
4472 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4473 struct ieee80211_mgd_auth_data *auth_data;
4474 u16 auth_alg;
4475 int err;
4476
4477 /* prepare auth data structure */
4478
4479 switch (req->auth_type) {
4480 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4481 auth_alg = WLAN_AUTH_OPEN;
4482 break;
4483 case NL80211_AUTHTYPE_SHARED_KEY:
4484 if (IS_ERR(local->wep_tx_tfm))
4485 return -EOPNOTSUPP;
4486 auth_alg = WLAN_AUTH_SHARED_KEY;
4487 break;
4488 case NL80211_AUTHTYPE_FT:
4489 auth_alg = WLAN_AUTH_FT;
4490 break;
4491 case NL80211_AUTHTYPE_NETWORK_EAP:
4492 auth_alg = WLAN_AUTH_LEAP;
4493 break;
4494 case NL80211_AUTHTYPE_SAE:
4495 auth_alg = WLAN_AUTH_SAE;
4496 break;
4497 case NL80211_AUTHTYPE_FILS_SK:
4498 auth_alg = WLAN_AUTH_FILS_SK;
4499 break;
4500 case NL80211_AUTHTYPE_FILS_SK_PFS:
4501 auth_alg = WLAN_AUTH_FILS_SK_PFS;
4502 break;
4503 case NL80211_AUTHTYPE_FILS_PK:
4504 auth_alg = WLAN_AUTH_FILS_PK;
4505 break;
4506 default:
4507 return -EOPNOTSUPP;
4508 }
4509
4510 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
4511 req->ie_len, GFP_KERNEL);
4512 if (!auth_data)
4513 return -ENOMEM;
4514
4515 auth_data->bss = req->bss;
4516
4517 if (req->auth_data_len >= 4) {
4518 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
4519 __le16 *pos = (__le16 *) req->auth_data;
4520
4521 auth_data->sae_trans = le16_to_cpu(pos[0]);
4522 auth_data->sae_status = le16_to_cpu(pos[1]);
4523 }
4524 memcpy(auth_data->data, req->auth_data + 4,
4525 req->auth_data_len - 4);
4526 auth_data->data_len += req->auth_data_len - 4;
4527 }
4528
4529 if (req->ie && req->ie_len) {
4530 memcpy(&auth_data->data[auth_data->data_len],
4531 req->ie, req->ie_len);
4532 auth_data->data_len += req->ie_len;
4533 }
4534
4535 if (req->key && req->key_len) {
4536 auth_data->key_len = req->key_len;
4537 auth_data->key_idx = req->key_idx;
4538 memcpy(auth_data->key, req->key, req->key_len);
4539 }
4540
4541 auth_data->algorithm = auth_alg;
4542
4543 /* try to authenticate/probe */
4544
4545 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4546 ifmgd->assoc_data) {
4547 err = -EBUSY;
4548 goto err_free;
4549 }
4550
4551 if (ifmgd->auth_data)
4552 ieee80211_destroy_auth_data(sdata, false);
4553
4554 /* prep auth_data so we don't go into idle on disassoc */
4555 ifmgd->auth_data = auth_data;
4556
4557 if (ifmgd->associated) {
4558 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4559
4560 sdata_info(sdata,
4561 "disconnect from AP %pM for new auth to %pM\n",
4562 ifmgd->associated->bssid, req->bss->bssid);
4563 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4564 WLAN_REASON_UNSPECIFIED,
4565 false, frame_buf);
4566
4567 ieee80211_report_disconnect(sdata, frame_buf,
4568 sizeof(frame_buf), true,
4569 WLAN_REASON_UNSPECIFIED);
4570 }
4571
4572 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4573
4574 err = ieee80211_prep_connection(sdata, req->bss, false, false);
4575 if (err)
4576 goto err_clear;
4577
4578 err = ieee80211_auth(sdata);
4579 if (err) {
4580 sta_info_destroy_addr(sdata, req->bss->bssid);
4581 goto err_clear;
4582 }
4583
4584 /* hold our own reference */
4585 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4586 return 0;
4587
4588 err_clear:
4589 eth_zero_addr(ifmgd->bssid);
4590 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4591 ifmgd->auth_data = NULL;
4592 mutex_lock(&sdata->local->mtx);
4593 ieee80211_vif_release_channel(sdata);
4594 mutex_unlock(&sdata->local->mtx);
4595 err_free:
4596 kfree(auth_data);
4597 return err;
4598 }
4599
4600 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4601 struct cfg80211_assoc_request *req)
4602 {
4603 struct ieee80211_local *local = sdata->local;
4604 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4605 struct ieee80211_bss *bss = (void *)req->bss->priv;
4606 struct ieee80211_mgd_assoc_data *assoc_data;
4607 const struct cfg80211_bss_ies *beacon_ies;
4608 struct ieee80211_supported_band *sband;
4609 const u8 *ssidie, *ht_ie, *vht_ie;
4610 int i, err;
4611 bool override = false;
4612
4613 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4614 if (!assoc_data)
4615 return -ENOMEM;
4616
4617 rcu_read_lock();
4618 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4619 if (!ssidie) {
4620 rcu_read_unlock();
4621 kfree(assoc_data);
4622 return -EINVAL;
4623 }
4624 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4625 assoc_data->ssid_len = ssidie[1];
4626 rcu_read_unlock();
4627
4628 if (ifmgd->associated) {
4629 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4630
4631 sdata_info(sdata,
4632 "disconnect from AP %pM for new assoc to %pM\n",
4633 ifmgd->associated->bssid, req->bss->bssid);
4634 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4635 WLAN_REASON_UNSPECIFIED,
4636 false, frame_buf);
4637
4638 ieee80211_report_disconnect(sdata, frame_buf,
4639 sizeof(frame_buf), true,
4640 WLAN_REASON_UNSPECIFIED);
4641 }
4642
4643 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4644 err = -EBUSY;
4645 goto err_free;
4646 }
4647
4648 if (ifmgd->assoc_data) {
4649 err = -EBUSY;
4650 goto err_free;
4651 }
4652
4653 if (ifmgd->auth_data) {
4654 bool match;
4655
4656 /* keep sta info, bssid if matching */
4657 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4658 ieee80211_destroy_auth_data(sdata, match);
4659 }
4660
4661 /* prepare assoc data */
4662
4663 ifmgd->beacon_crc_valid = false;
4664
4665 assoc_data->wmm = bss->wmm_used &&
4666 (local->hw.queues >= IEEE80211_NUM_ACS);
4667
4668 /*
4669 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4670 * We still associate in non-HT mode (11a/b/g) if any one of these
4671 * ciphers is configured as pairwise.
4672 * We can set this to true for non-11n hardware, that'll be checked
4673 * separately along with the peer capabilities.
4674 */
4675 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4676 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4677 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4678 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4679 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4680 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4681 netdev_info(sdata->dev,
4682 "disabling HT/VHT due to WEP/TKIP use\n");
4683 }
4684 }
4685
4686 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4687 sband = local->hw.wiphy->bands[req->bss->channel->band];
4688 if (!sband->ht_cap.ht_supported ||
4689 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4690 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4691 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4692 if (!bss->wmm_used &&
4693 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4694 netdev_info(sdata->dev,
4695 "disabling HT as WMM/QoS is not supported by the AP\n");
4696 }
4697
4698 /* disable VHT if we don't support it or the AP doesn't use WMM */
4699 if (!sband->vht_cap.vht_supported ||
4700 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4701 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4702 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4703 if (!bss->wmm_used &&
4704 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4705 netdev_info(sdata->dev,
4706 "disabling VHT as WMM/QoS is not supported by the AP\n");
4707 }
4708
4709 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4710 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4711 sizeof(ifmgd->ht_capa_mask));
4712
4713 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4714 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4715 sizeof(ifmgd->vht_capa_mask));
4716
4717 if (req->ie && req->ie_len) {
4718 memcpy(assoc_data->ie, req->ie, req->ie_len);
4719 assoc_data->ie_len = req->ie_len;
4720 }
4721
4722 if (req->fils_kek) {
4723 /* should already be checked in cfg80211 - so warn */
4724 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
4725 err = -EINVAL;
4726 goto err_free;
4727 }
4728 memcpy(assoc_data->fils_kek, req->fils_kek,
4729 req->fils_kek_len);
4730 assoc_data->fils_kek_len = req->fils_kek_len;
4731 }
4732
4733 if (req->fils_nonces)
4734 memcpy(assoc_data->fils_nonces, req->fils_nonces,
4735 2 * FILS_NONCE_LEN);
4736
4737 assoc_data->bss = req->bss;
4738
4739 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4740 if (ifmgd->powersave)
4741 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4742 else
4743 sdata->smps_mode = IEEE80211_SMPS_OFF;
4744 } else
4745 sdata->smps_mode = ifmgd->req_smps;
4746
4747 assoc_data->capability = req->bss->capability;
4748 assoc_data->supp_rates = bss->supp_rates;
4749 assoc_data->supp_rates_len = bss->supp_rates_len;
4750
4751 rcu_read_lock();
4752 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4753 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4754 assoc_data->ap_ht_param =
4755 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4756 else
4757 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4758 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4759 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4760 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4761 sizeof(struct ieee80211_vht_cap));
4762 else
4763 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4764 rcu_read_unlock();
4765
4766 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4767 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4768 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4769 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4770
4771 if (bss->wmm_used && bss->uapsd_supported &&
4772 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4773 assoc_data->uapsd = true;
4774 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4775 } else {
4776 assoc_data->uapsd = false;
4777 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4778 }
4779
4780 if (req->prev_bssid)
4781 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4782
4783 if (req->use_mfp) {
4784 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4785 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4786 } else {
4787 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4788 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4789 }
4790
4791 if (req->flags & ASSOC_REQ_USE_RRM)
4792 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4793 else
4794 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4795
4796 if (req->crypto.control_port)
4797 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4798 else
4799 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4800
4801 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4802 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4803 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4804 sdata->vif.type);
4805
4806 /* kick off associate process */
4807
4808 ifmgd->assoc_data = assoc_data;
4809 ifmgd->dtim_period = 0;
4810 ifmgd->have_beacon = false;
4811
4812 /* override HT/VHT configuration only if the AP and we support it */
4813 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4814 struct ieee80211_sta_ht_cap sta_ht_cap;
4815
4816 if (req->flags & ASSOC_REQ_DISABLE_HT)
4817 override = true;
4818
4819 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4820 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4821
4822 /* check for 40 MHz disable override */
4823 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4824 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4825 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4826 override = true;
4827
4828 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4829 req->flags & ASSOC_REQ_DISABLE_VHT)
4830 override = true;
4831 }
4832
4833 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4834 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4835 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4836 }
4837
4838 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4839 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4840
4841 err = ieee80211_prep_connection(sdata, req->bss, true, override);
4842 if (err)
4843 goto err_clear;
4844
4845 rcu_read_lock();
4846 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4847
4848 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4849 !beacon_ies) {
4850 /*
4851 * Wait up to one beacon interval ...
4852 * should this be more if we miss one?
4853 */
4854 sdata_info(sdata, "waiting for beacon from %pM\n",
4855 ifmgd->bssid);
4856 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4857 assoc_data->timeout_started = true;
4858 assoc_data->need_beacon = true;
4859 } else if (beacon_ies) {
4860 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4861 beacon_ies->data,
4862 beacon_ies->len);
4863 u8 dtim_count = 0;
4864
4865 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4866 const struct ieee80211_tim_ie *tim;
4867 tim = (void *)(tim_ie + 2);
4868 ifmgd->dtim_period = tim->dtim_period;
4869 dtim_count = tim->dtim_count;
4870 }
4871 ifmgd->have_beacon = true;
4872 assoc_data->timeout = jiffies;
4873 assoc_data->timeout_started = true;
4874
4875 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4876 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4877 sdata->vif.bss_conf.sync_device_ts =
4878 bss->device_ts_beacon;
4879 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4880 }
4881 } else {
4882 assoc_data->timeout = jiffies;
4883 assoc_data->timeout_started = true;
4884 }
4885 rcu_read_unlock();
4886
4887 run_again(sdata, assoc_data->timeout);
4888
4889 if (bss->corrupt_data) {
4890 char *corrupt_type = "data";
4891 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4892 if (bss->corrupt_data &
4893 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4894 corrupt_type = "beacon and probe response";
4895 else
4896 corrupt_type = "beacon";
4897 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4898 corrupt_type = "probe response";
4899 sdata_info(sdata, "associating with AP with corrupt %s\n",
4900 corrupt_type);
4901 }
4902
4903 return 0;
4904 err_clear:
4905 eth_zero_addr(ifmgd->bssid);
4906 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4907 ifmgd->assoc_data = NULL;
4908 err_free:
4909 kfree(assoc_data);
4910 return err;
4911 }
4912
4913 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4914 struct cfg80211_deauth_request *req)
4915 {
4916 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4917 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4918 bool tx = !req->local_state_change;
4919
4920 if (ifmgd->auth_data &&
4921 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4922 sdata_info(sdata,
4923 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4924 req->bssid, req->reason_code,
4925 ieee80211_get_reason_code_string(req->reason_code));
4926
4927 drv_mgd_prepare_tx(sdata->local, sdata);
4928 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4929 IEEE80211_STYPE_DEAUTH,
4930 req->reason_code, tx,
4931 frame_buf);
4932 ieee80211_destroy_auth_data(sdata, false);
4933 ieee80211_report_disconnect(sdata, frame_buf,
4934 sizeof(frame_buf), true,
4935 req->reason_code);
4936
4937 return 0;
4938 }
4939
4940 if (ifmgd->assoc_data &&
4941 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4942 sdata_info(sdata,
4943 "aborting association with %pM by local choice (Reason: %u=%s)\n",
4944 req->bssid, req->reason_code,
4945 ieee80211_get_reason_code_string(req->reason_code));
4946
4947 drv_mgd_prepare_tx(sdata->local, sdata);
4948 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4949 IEEE80211_STYPE_DEAUTH,
4950 req->reason_code, tx,
4951 frame_buf);
4952 ieee80211_destroy_assoc_data(sdata, false);
4953 ieee80211_report_disconnect(sdata, frame_buf,
4954 sizeof(frame_buf), true,
4955 req->reason_code);
4956 return 0;
4957 }
4958
4959 if (ifmgd->associated &&
4960 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4961 sdata_info(sdata,
4962 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4963 req->bssid, req->reason_code,
4964 ieee80211_get_reason_code_string(req->reason_code));
4965
4966 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4967 req->reason_code, tx, frame_buf);
4968 ieee80211_report_disconnect(sdata, frame_buf,
4969 sizeof(frame_buf), true,
4970 req->reason_code);
4971 return 0;
4972 }
4973
4974 return -ENOTCONN;
4975 }
4976
4977 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4978 struct cfg80211_disassoc_request *req)
4979 {
4980 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4981 u8 bssid[ETH_ALEN];
4982 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4983
4984 /*
4985 * cfg80211 should catch this ... but it's racy since
4986 * we can receive a disassoc frame, process it, hand it
4987 * to cfg80211 while that's in a locked section already
4988 * trying to tell us that the user wants to disconnect.
4989 */
4990 if (ifmgd->associated != req->bss)
4991 return -ENOLINK;
4992
4993 sdata_info(sdata,
4994 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4995 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4996
4997 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4998 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4999 req->reason_code, !req->local_state_change,
5000 frame_buf);
5001
5002 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5003 req->reason_code);
5004
5005 return 0;
5006 }
5007
5008 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5009 {
5010 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5011
5012 /*
5013 * Make sure some work items will not run after this,
5014 * they will not do anything but might not have been
5015 * cancelled when disconnecting.
5016 */
5017 cancel_work_sync(&ifmgd->monitor_work);
5018 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5019 cancel_work_sync(&ifmgd->request_smps_work);
5020 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5021 cancel_work_sync(&ifmgd->chswitch_work);
5022 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5023
5024 sdata_lock(sdata);
5025 if (ifmgd->assoc_data) {
5026 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5027 ieee80211_destroy_assoc_data(sdata, false);
5028 cfg80211_assoc_timeout(sdata->dev, bss);
5029 }
5030 if (ifmgd->auth_data)
5031 ieee80211_destroy_auth_data(sdata, false);
5032 spin_lock_bh(&ifmgd->teardown_lock);
5033 if (ifmgd->teardown_skb) {
5034 kfree_skb(ifmgd->teardown_skb);
5035 ifmgd->teardown_skb = NULL;
5036 ifmgd->orig_teardown_skb = NULL;
5037 }
5038 spin_unlock_bh(&ifmgd->teardown_lock);
5039 del_timer_sync(&ifmgd->timer);
5040 sdata_unlock(sdata);
5041 }
5042
5043 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5044 enum nl80211_cqm_rssi_threshold_event rssi_event,
5045 gfp_t gfp)
5046 {
5047 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5048
5049 trace_api_cqm_rssi_notify(sdata, rssi_event);
5050
5051 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5052 }
5053 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5054
5055 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5056 {
5057 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5058
5059 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5060
5061 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5062 }
5063 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
Motorola kernel-slsi