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mac80211: track AP and peer STA TDLS chan-switch support
[mirror_ubuntu-artful-kernel.git] / net / mac80211 / mlme.c
1 /*
2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
15 #include <linux/delay.h>
16 #include <linux/if_ether.h>
17 #include <linux/skbuff.h>
18 #include <linux/if_arp.h>
19 #include <linux/etherdevice.h>
20 #include <linux/moduleparam.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/pm_qos.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
34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
37 #define IEEE80211_AUTH_MAX_TRIES 3
38 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
40 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
41 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
42 #define IEEE80211_ASSOC_MAX_TRIES 3
43
44 static int max_nullfunc_tries = 2;
45 module_param(max_nullfunc_tries, int, 0644);
46 MODULE_PARM_DESC(max_nullfunc_tries,
47 "Maximum nullfunc tx tries before disconnecting (reason 4).");
48
49 static int max_probe_tries = 5;
50 module_param(max_probe_tries, int, 0644);
51 MODULE_PARM_DESC(max_probe_tries,
52 "Maximum probe tries before disconnecting (reason 4).");
53
54 /*
55 * Beacon loss timeout is calculated as N frames times the
56 * advertised beacon interval. This may need to be somewhat
57 * higher than what hardware might detect to account for
58 * delays in the host processing frames. But since we also
59 * probe on beacon miss before declaring the connection lost
60 * default to what we want.
61 */
62 static int beacon_loss_count = 7;
63 module_param(beacon_loss_count, int, 0644);
64 MODULE_PARM_DESC(beacon_loss_count,
65 "Number of beacon intervals before we decide beacon was lost.");
66
67 /*
68 * Time the connection can be idle before we probe
69 * it to see if we can still talk to the AP.
70 */
71 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
72 /*
73 * Time we wait for a probe response after sending
74 * a probe request because of beacon loss or for
75 * checking the connection still works.
76 */
77 static int probe_wait_ms = 500;
78 module_param(probe_wait_ms, int, 0644);
79 MODULE_PARM_DESC(probe_wait_ms,
80 "Maximum time(ms) to wait for probe response"
81 " before disconnecting (reason 4).");
82
83 /*
84 * Weight given to the latest Beacon frame when calculating average signal
85 * strength for Beacon frames received in the current BSS. This must be
86 * between 1 and 15.
87 */
88 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
89
90 /*
91 * How many Beacon frames need to have been used in average signal strength
92 * before starting to indicate signal change events.
93 */
94 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
95
96 /*
97 * We can have multiple work items (and connection probing)
98 * scheduling this timer, but we need to take care to only
99 * reschedule it when it should fire _earlier_ than it was
100 * asked for before, or if it's not pending right now. This
101 * function ensures that. Note that it then is required to
102 * run this function for all timeouts after the first one
103 * has happened -- the work that runs from this timer will
104 * do that.
105 */
106 static void run_again(struct ieee80211_sub_if_data *sdata,
107 unsigned long timeout)
108 {
109 sdata_assert_lock(sdata);
110
111 if (!timer_pending(&sdata->u.mgd.timer) ||
112 time_before(timeout, sdata->u.mgd.timer.expires))
113 mod_timer(&sdata->u.mgd.timer, timeout);
114 }
115
116 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
117 {
118 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
119 return;
120
121 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
122 return;
123
124 mod_timer(&sdata->u.mgd.bcn_mon_timer,
125 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
126 }
127
128 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
129 {
130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
131
132 if (unlikely(!sdata->u.mgd.associated))
133 return;
134
135 ifmgd->probe_send_count = 0;
136
137 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
138 return;
139
140 mod_timer(&sdata->u.mgd.conn_mon_timer,
141 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
142 }
143
144 static int ecw2cw(int ecw)
145 {
146 return (1 << ecw) - 1;
147 }
148
149 static u32
150 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
151 struct ieee80211_supported_band *sband,
152 struct ieee80211_channel *channel,
153 const struct ieee80211_ht_cap *ht_cap,
154 const struct ieee80211_ht_operation *ht_oper,
155 const struct ieee80211_vht_operation *vht_oper,
156 struct cfg80211_chan_def *chandef, bool tracking)
157 {
158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
159 struct cfg80211_chan_def vht_chandef;
160 u32 ht_cfreq, ret;
161
162 chandef->chan = channel;
163 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
164 chandef->center_freq1 = channel->center_freq;
165 chandef->center_freq2 = 0;
166
167 if (!ht_cap || !ht_oper || !sband->ht_cap.ht_supported) {
168 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
169 goto out;
170 }
171
172 chandef->width = NL80211_CHAN_WIDTH_20;
173
174 if (!(ht_cap->cap_info &
175 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
176 ret = IEEE80211_STA_DISABLE_40MHZ;
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 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
201 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
202 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
203 chandef->width = NL80211_CHAN_WIDTH_40;
204 chandef->center_freq1 += 10;
205 break;
206 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
207 chandef->width = NL80211_CHAN_WIDTH_40;
208 chandef->center_freq1 -= 10;
209 break;
210 }
211 } else {
212 /* 40 MHz (and 80 MHz) must be supported for VHT */
213 ret = IEEE80211_STA_DISABLE_VHT;
214 /* also mark 40 MHz disabled */
215 ret |= IEEE80211_STA_DISABLE_40MHZ;
216 goto out;
217 }
218
219 if (!vht_oper || !sband->vht_cap.vht_supported) {
220 ret = IEEE80211_STA_DISABLE_VHT;
221 goto out;
222 }
223
224 vht_chandef.chan = channel;
225 vht_chandef.center_freq1 =
226 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
227 channel->band);
228 vht_chandef.center_freq2 = 0;
229
230 switch (vht_oper->chan_width) {
231 case IEEE80211_VHT_CHANWIDTH_USE_HT:
232 vht_chandef.width = chandef->width;
233 vht_chandef.center_freq1 = chandef->center_freq1;
234 break;
235 case IEEE80211_VHT_CHANWIDTH_80MHZ:
236 vht_chandef.width = NL80211_CHAN_WIDTH_80;
237 break;
238 case IEEE80211_VHT_CHANWIDTH_160MHZ:
239 vht_chandef.width = NL80211_CHAN_WIDTH_160;
240 break;
241 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
242 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
243 vht_chandef.center_freq2 =
244 ieee80211_channel_to_frequency(
245 vht_oper->center_freq_seg2_idx,
246 channel->band);
247 break;
248 default:
249 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
250 sdata_info(sdata,
251 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
252 vht_oper->chan_width);
253 ret = IEEE80211_STA_DISABLE_VHT;
254 goto out;
255 }
256
257 if (!cfg80211_chandef_valid(&vht_chandef)) {
258 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
259 sdata_info(sdata,
260 "AP VHT information is invalid, disable VHT\n");
261 ret = IEEE80211_STA_DISABLE_VHT;
262 goto out;
263 }
264
265 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
266 ret = 0;
267 goto out;
268 }
269
270 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
271 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
272 sdata_info(sdata,
273 "AP VHT information doesn't match HT, disable VHT\n");
274 ret = IEEE80211_STA_DISABLE_VHT;
275 goto out;
276 }
277
278 *chandef = vht_chandef;
279
280 ret = 0;
281
282 out:
283 /*
284 * When tracking the current AP, don't do any further checks if the
285 * new chandef is identical to the one we're currently using for the
286 * connection. This keeps us from playing ping-pong with regulatory,
287 * without it the following can happen (for example):
288 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
289 * - AP advertises regdom US
290 * - CRDA loads regdom US with 80 MHz prohibited (old database)
291 * - the code below detects an unsupported channel, downgrades, and
292 * we disconnect from the AP in the caller
293 * - disconnect causes CRDA to reload world regdomain and the game
294 * starts anew.
295 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
296 *
297 * It seems possible that there are still scenarios with CSA or real
298 * bandwidth changes where a this could happen, but those cases are
299 * less common and wouldn't completely prevent using the AP.
300 */
301 if (tracking &&
302 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
303 return ret;
304
305 /* don't print the message below for VHT mismatch if VHT is disabled */
306 if (ret & IEEE80211_STA_DISABLE_VHT)
307 vht_chandef = *chandef;
308
309 /*
310 * Ignore the DISABLED flag when we're already connected and only
311 * tracking the APs beacon for bandwidth changes - otherwise we
312 * might get disconnected here if we connect to an AP, update our
313 * regulatory information based on the AP's country IE and the
314 * information we have is wrong/outdated and disables the channel
315 * that we're actually using for the connection to the AP.
316 */
317 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
318 tracking ? 0 :
319 IEEE80211_CHAN_DISABLED)) {
320 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
321 ret = IEEE80211_STA_DISABLE_HT |
322 IEEE80211_STA_DISABLE_VHT;
323 break;
324 }
325
326 ret |= ieee80211_chandef_downgrade(chandef);
327 }
328
329 if (chandef->width != vht_chandef.width && !tracking)
330 sdata_info(sdata,
331 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
332
333 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
334 return ret;
335 }
336
337 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
338 struct sta_info *sta,
339 const struct ieee80211_ht_cap *ht_cap,
340 const struct ieee80211_ht_operation *ht_oper,
341 const struct ieee80211_vht_operation *vht_oper,
342 const u8 *bssid, u32 *changed)
343 {
344 struct ieee80211_local *local = sdata->local;
345 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
346 struct ieee80211_supported_band *sband;
347 struct ieee80211_channel *chan;
348 struct cfg80211_chan_def chandef;
349 u16 ht_opmode;
350 u32 flags;
351 enum ieee80211_sta_rx_bandwidth new_sta_bw;
352 int ret;
353
354 /* if HT was/is disabled, don't track any bandwidth changes */
355 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
356 return 0;
357
358 /* don't check VHT if we associated as non-VHT station */
359 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
360 vht_oper = NULL;
361
362 if (WARN_ON_ONCE(!sta))
363 return -EINVAL;
364
365 /*
366 * if bss configuration changed store the new one -
367 * this may be applicable even if channel is identical
368 */
369 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
370 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
371 *changed |= BSS_CHANGED_HT;
372 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
373 }
374
375 chan = sdata->vif.bss_conf.chandef.chan;
376 sband = local->hw.wiphy->bands[chan->band];
377
378 /* calculate new channel (type) based on HT/VHT operation IEs */
379 flags = ieee80211_determine_chantype(sdata, sband, chan,
380 ht_cap, ht_oper, vht_oper,
381 &chandef, true);
382
383 /*
384 * Downgrade the new channel if we associated with restricted
385 * capabilities. For example, if we associated as a 20 MHz STA
386 * to a 40 MHz AP (due to regulatory, capabilities or config
387 * reasons) then switching to a 40 MHz channel now won't do us
388 * any good -- we couldn't use it with the AP.
389 */
390 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
391 chandef.width == NL80211_CHAN_WIDTH_80P80)
392 flags |= ieee80211_chandef_downgrade(&chandef);
393 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
394 chandef.width == NL80211_CHAN_WIDTH_160)
395 flags |= ieee80211_chandef_downgrade(&chandef);
396 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
397 chandef.width > NL80211_CHAN_WIDTH_20)
398 flags |= ieee80211_chandef_downgrade(&chandef);
399
400 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
401 return 0;
402
403 sdata_info(sdata,
404 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
405 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
406 chandef.center_freq1, chandef.center_freq2);
407
408 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
409 IEEE80211_STA_DISABLE_VHT |
410 IEEE80211_STA_DISABLE_40MHZ |
411 IEEE80211_STA_DISABLE_80P80MHZ |
412 IEEE80211_STA_DISABLE_160MHZ)) ||
413 !cfg80211_chandef_valid(&chandef)) {
414 sdata_info(sdata,
415 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
416 ifmgd->bssid);
417 return -EINVAL;
418 }
419
420 switch (chandef.width) {
421 case NL80211_CHAN_WIDTH_20_NOHT:
422 case NL80211_CHAN_WIDTH_20:
423 new_sta_bw = IEEE80211_STA_RX_BW_20;
424 break;
425 case NL80211_CHAN_WIDTH_40:
426 new_sta_bw = IEEE80211_STA_RX_BW_40;
427 break;
428 case NL80211_CHAN_WIDTH_80:
429 new_sta_bw = IEEE80211_STA_RX_BW_80;
430 break;
431 case NL80211_CHAN_WIDTH_80P80:
432 case NL80211_CHAN_WIDTH_160:
433 new_sta_bw = IEEE80211_STA_RX_BW_160;
434 break;
435 default:
436 return -EINVAL;
437 }
438
439 if (new_sta_bw > sta->cur_max_bandwidth)
440 new_sta_bw = sta->cur_max_bandwidth;
441
442 if (new_sta_bw < sta->sta.bandwidth) {
443 sta->sta.bandwidth = new_sta_bw;
444 rate_control_rate_update(local, sband, sta,
445 IEEE80211_RC_BW_CHANGED);
446 }
447
448 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
449 if (ret) {
450 sdata_info(sdata,
451 "AP %pM changed bandwidth to incompatible one - disconnect\n",
452 ifmgd->bssid);
453 return ret;
454 }
455
456 if (new_sta_bw > sta->sta.bandwidth) {
457 sta->sta.bandwidth = new_sta_bw;
458 rate_control_rate_update(local, sband, sta,
459 IEEE80211_RC_BW_CHANGED);
460 }
461
462 return 0;
463 }
464
465 /* frame sending functions */
466
467 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
468 struct sk_buff *skb, u8 ap_ht_param,
469 struct ieee80211_supported_band *sband,
470 struct ieee80211_channel *channel,
471 enum ieee80211_smps_mode smps)
472 {
473 u8 *pos;
474 u32 flags = channel->flags;
475 u16 cap;
476 struct ieee80211_sta_ht_cap ht_cap;
477
478 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
479
480 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
481 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
482
483 /* determine capability flags */
484 cap = ht_cap.cap;
485
486 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
487 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
488 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
489 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
490 cap &= ~IEEE80211_HT_CAP_SGI_40;
491 }
492 break;
493 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
494 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
495 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
496 cap &= ~IEEE80211_HT_CAP_SGI_40;
497 }
498 break;
499 }
500
501 /*
502 * If 40 MHz was disabled associate as though we weren't
503 * capable of 40 MHz -- some broken APs will never fall
504 * back to trying to transmit in 20 MHz.
505 */
506 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
507 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
508 cap &= ~IEEE80211_HT_CAP_SGI_40;
509 }
510
511 /* set SM PS mode properly */
512 cap &= ~IEEE80211_HT_CAP_SM_PS;
513 switch (smps) {
514 case IEEE80211_SMPS_AUTOMATIC:
515 case IEEE80211_SMPS_NUM_MODES:
516 WARN_ON(1);
517 case IEEE80211_SMPS_OFF:
518 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
519 IEEE80211_HT_CAP_SM_PS_SHIFT;
520 break;
521 case IEEE80211_SMPS_STATIC:
522 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
523 IEEE80211_HT_CAP_SM_PS_SHIFT;
524 break;
525 case IEEE80211_SMPS_DYNAMIC:
526 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
527 IEEE80211_HT_CAP_SM_PS_SHIFT;
528 break;
529 }
530
531 /* reserve and fill IE */
532 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
533 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
534 }
535
536 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
537 struct sk_buff *skb,
538 struct ieee80211_supported_band *sband,
539 struct ieee80211_vht_cap *ap_vht_cap)
540 {
541 u8 *pos;
542 u32 cap;
543 struct ieee80211_sta_vht_cap vht_cap;
544 u32 mask, ap_bf_sts, our_bf_sts;
545
546 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
547
548 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
549 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
550
551 /* determine capability flags */
552 cap = vht_cap.cap;
553
554 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
555 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
556 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
557 }
558
559 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
560 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
561 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
562 }
563
564 /*
565 * Some APs apparently get confused if our capabilities are better
566 * than theirs, so restrict what we advertise in the assoc request.
567 */
568 if (!(ap_vht_cap->vht_cap_info &
569 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
570 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
571
572 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
573
574 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
575 our_bf_sts = cap & mask;
576
577 if (ap_bf_sts < our_bf_sts) {
578 cap &= ~mask;
579 cap |= ap_bf_sts;
580 }
581
582 /* reserve and fill IE */
583 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
584 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
585 }
586
587 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
588 {
589 struct ieee80211_local *local = sdata->local;
590 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
591 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
592 struct sk_buff *skb;
593 struct ieee80211_mgmt *mgmt;
594 u8 *pos, qos_info;
595 size_t offset = 0, noffset;
596 int i, count, rates_len, supp_rates_len, shift;
597 u16 capab;
598 struct ieee80211_supported_band *sband;
599 struct ieee80211_chanctx_conf *chanctx_conf;
600 struct ieee80211_channel *chan;
601 u32 rate_flags, rates = 0;
602
603 sdata_assert_lock(sdata);
604
605 rcu_read_lock();
606 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
607 if (WARN_ON(!chanctx_conf)) {
608 rcu_read_unlock();
609 return;
610 }
611 chan = chanctx_conf->def.chan;
612 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
613 rcu_read_unlock();
614 sband = local->hw.wiphy->bands[chan->band];
615 shift = ieee80211_vif_get_shift(&sdata->vif);
616
617 if (assoc_data->supp_rates_len) {
618 /*
619 * Get all rates supported by the device and the AP as
620 * some APs don't like getting a superset of their rates
621 * in the association request (e.g. D-Link DAP 1353 in
622 * b-only mode)...
623 */
624 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
625 assoc_data->supp_rates,
626 assoc_data->supp_rates_len,
627 &rates);
628 } else {
629 /*
630 * In case AP not provide any supported rates information
631 * before association, we send information element(s) with
632 * all rates that we support.
633 */
634 rates_len = 0;
635 for (i = 0; i < sband->n_bitrates; i++) {
636 if ((rate_flags & sband->bitrates[i].flags)
637 != rate_flags)
638 continue;
639 rates |= BIT(i);
640 rates_len++;
641 }
642 }
643
644 skb = alloc_skb(local->hw.extra_tx_headroom +
645 sizeof(*mgmt) + /* bit too much but doesn't matter */
646 2 + assoc_data->ssid_len + /* SSID */
647 4 + rates_len + /* (extended) rates */
648 4 + /* power capability */
649 2 + 2 * sband->n_channels + /* supported channels */
650 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
651 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
652 assoc_data->ie_len + /* extra IEs */
653 9, /* WMM */
654 GFP_KERNEL);
655 if (!skb)
656 return;
657
658 skb_reserve(skb, local->hw.extra_tx_headroom);
659
660 capab = WLAN_CAPABILITY_ESS;
661
662 if (sband->band == IEEE80211_BAND_2GHZ) {
663 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
664 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
665 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
666 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
667 }
668
669 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
670 capab |= WLAN_CAPABILITY_PRIVACY;
671
672 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
673 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
674 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
675
676 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
677 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
678
679 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
680 memset(mgmt, 0, 24);
681 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
682 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
683 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
684
685 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
686 skb_put(skb, 10);
687 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
688 IEEE80211_STYPE_REASSOC_REQ);
689 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
690 mgmt->u.reassoc_req.listen_interval =
691 cpu_to_le16(local->hw.conf.listen_interval);
692 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
693 ETH_ALEN);
694 } else {
695 skb_put(skb, 4);
696 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
697 IEEE80211_STYPE_ASSOC_REQ);
698 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
699 mgmt->u.assoc_req.listen_interval =
700 cpu_to_le16(local->hw.conf.listen_interval);
701 }
702
703 /* SSID */
704 pos = skb_put(skb, 2 + assoc_data->ssid_len);
705 *pos++ = WLAN_EID_SSID;
706 *pos++ = assoc_data->ssid_len;
707 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
708
709 /* add all rates which were marked to be used above */
710 supp_rates_len = rates_len;
711 if (supp_rates_len > 8)
712 supp_rates_len = 8;
713
714 pos = skb_put(skb, supp_rates_len + 2);
715 *pos++ = WLAN_EID_SUPP_RATES;
716 *pos++ = supp_rates_len;
717
718 count = 0;
719 for (i = 0; i < sband->n_bitrates; i++) {
720 if (BIT(i) & rates) {
721 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
722 5 * (1 << shift));
723 *pos++ = (u8) rate;
724 if (++count == 8)
725 break;
726 }
727 }
728
729 if (rates_len > count) {
730 pos = skb_put(skb, rates_len - count + 2);
731 *pos++ = WLAN_EID_EXT_SUPP_RATES;
732 *pos++ = rates_len - count;
733
734 for (i++; i < sband->n_bitrates; i++) {
735 if (BIT(i) & rates) {
736 int rate;
737 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
738 5 * (1 << shift));
739 *pos++ = (u8) rate;
740 }
741 }
742 }
743
744 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
745 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
746 pos = skb_put(skb, 4);
747 *pos++ = WLAN_EID_PWR_CAPABILITY;
748 *pos++ = 2;
749 *pos++ = 0; /* min tx power */
750 /* max tx power */
751 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
752 }
753
754 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
755 /* TODO: get this in reg domain format */
756 pos = skb_put(skb, 2 * sband->n_channels + 2);
757 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
758 *pos++ = 2 * sband->n_channels;
759 for (i = 0; i < sband->n_channels; i++) {
760 *pos++ = ieee80211_frequency_to_channel(
761 sband->channels[i].center_freq);
762 *pos++ = 1; /* one channel in the subband*/
763 }
764 }
765
766 /* if present, add any custom IEs that go before HT */
767 if (assoc_data->ie_len) {
768 static const u8 before_ht[] = {
769 WLAN_EID_SSID,
770 WLAN_EID_SUPP_RATES,
771 WLAN_EID_EXT_SUPP_RATES,
772 WLAN_EID_PWR_CAPABILITY,
773 WLAN_EID_SUPPORTED_CHANNELS,
774 WLAN_EID_RSN,
775 WLAN_EID_QOS_CAPA,
776 WLAN_EID_RRM_ENABLED_CAPABILITIES,
777 WLAN_EID_MOBILITY_DOMAIN,
778 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
779 WLAN_EID_RIC_DATA, /* reassoc only */
780 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
781 };
782 static const u8 after_ric[] = {
783 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
784 WLAN_EID_HT_CAPABILITY,
785 WLAN_EID_BSS_COEX_2040,
786 WLAN_EID_EXT_CAPABILITY,
787 WLAN_EID_QOS_TRAFFIC_CAPA,
788 WLAN_EID_TIM_BCAST_REQ,
789 WLAN_EID_INTERWORKING,
790 /* 60GHz doesn't happen right now */
791 WLAN_EID_VHT_CAPABILITY,
792 WLAN_EID_OPMODE_NOTIF,
793 };
794
795 noffset = ieee80211_ie_split_ric(assoc_data->ie,
796 assoc_data->ie_len,
797 before_ht,
798 ARRAY_SIZE(before_ht),
799 after_ric,
800 ARRAY_SIZE(after_ric),
801 offset);
802 pos = skb_put(skb, noffset - offset);
803 memcpy(pos, assoc_data->ie + offset, noffset - offset);
804 offset = noffset;
805 }
806
807 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
808 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
809 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
810
811 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
812 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
813 sband, chan, sdata->smps_mode);
814
815 /* if present, add any custom IEs that go before VHT */
816 if (assoc_data->ie_len) {
817 static const u8 before_vht[] = {
818 WLAN_EID_SSID,
819 WLAN_EID_SUPP_RATES,
820 WLAN_EID_EXT_SUPP_RATES,
821 WLAN_EID_PWR_CAPABILITY,
822 WLAN_EID_SUPPORTED_CHANNELS,
823 WLAN_EID_RSN,
824 WLAN_EID_QOS_CAPA,
825 WLAN_EID_RRM_ENABLED_CAPABILITIES,
826 WLAN_EID_MOBILITY_DOMAIN,
827 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
828 WLAN_EID_HT_CAPABILITY,
829 WLAN_EID_BSS_COEX_2040,
830 WLAN_EID_EXT_CAPABILITY,
831 WLAN_EID_QOS_TRAFFIC_CAPA,
832 WLAN_EID_TIM_BCAST_REQ,
833 WLAN_EID_INTERWORKING,
834 };
835
836 /* RIC already taken above, so no need to handle here anymore */
837 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
838 before_vht, ARRAY_SIZE(before_vht),
839 offset);
840 pos = skb_put(skb, noffset - offset);
841 memcpy(pos, assoc_data->ie + offset, noffset - offset);
842 offset = noffset;
843 }
844
845 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
846 ieee80211_add_vht_ie(sdata, skb, sband,
847 &assoc_data->ap_vht_cap);
848
849 /* if present, add any custom non-vendor IEs that go after HT */
850 if (assoc_data->ie_len) {
851 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
852 assoc_data->ie_len,
853 offset);
854 pos = skb_put(skb, noffset - offset);
855 memcpy(pos, assoc_data->ie + offset, noffset - offset);
856 offset = noffset;
857 }
858
859 if (assoc_data->wmm) {
860 if (assoc_data->uapsd) {
861 qos_info = ifmgd->uapsd_queues;
862 qos_info |= (ifmgd->uapsd_max_sp_len <<
863 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
864 } else {
865 qos_info = 0;
866 }
867
868 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
869 }
870
871 /* add any remaining custom (i.e. vendor specific here) IEs */
872 if (assoc_data->ie_len) {
873 noffset = assoc_data->ie_len;
874 pos = skb_put(skb, noffset - offset);
875 memcpy(pos, assoc_data->ie + offset, noffset - offset);
876 }
877
878 drv_mgd_prepare_tx(local, sdata);
879
880 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
881 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
882 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
883 IEEE80211_TX_INTFL_MLME_CONN_TX;
884 ieee80211_tx_skb(sdata, skb);
885 }
886
887 void ieee80211_send_pspoll(struct ieee80211_local *local,
888 struct ieee80211_sub_if_data *sdata)
889 {
890 struct ieee80211_pspoll *pspoll;
891 struct sk_buff *skb;
892
893 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
894 if (!skb)
895 return;
896
897 pspoll = (struct ieee80211_pspoll *) skb->data;
898 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
899
900 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
901 ieee80211_tx_skb(sdata, skb);
902 }
903
904 void ieee80211_send_nullfunc(struct ieee80211_local *local,
905 struct ieee80211_sub_if_data *sdata,
906 int powersave)
907 {
908 struct sk_buff *skb;
909 struct ieee80211_hdr_3addr *nullfunc;
910 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
911
912 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
913 if (!skb)
914 return;
915
916 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
917 if (powersave)
918 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
919
920 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
921 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
922
923 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
924 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
925
926 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
927 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
928
929 ieee80211_tx_skb(sdata, skb);
930 }
931
932 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
933 struct ieee80211_sub_if_data *sdata)
934 {
935 struct sk_buff *skb;
936 struct ieee80211_hdr *nullfunc;
937 __le16 fc;
938
939 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
940 return;
941
942 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
943 if (!skb)
944 return;
945
946 skb_reserve(skb, local->hw.extra_tx_headroom);
947
948 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
949 memset(nullfunc, 0, 30);
950 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
951 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
952 nullfunc->frame_control = fc;
953 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
954 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
955 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
956 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
957
958 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
959 ieee80211_tx_skb(sdata, skb);
960 }
961
962 /* spectrum management related things */
963 static void ieee80211_chswitch_work(struct work_struct *work)
964 {
965 struct ieee80211_sub_if_data *sdata =
966 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
967 struct ieee80211_local *local = sdata->local;
968 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
969 int ret;
970
971 if (!ieee80211_sdata_running(sdata))
972 return;
973
974 sdata_lock(sdata);
975 mutex_lock(&local->mtx);
976 mutex_lock(&local->chanctx_mtx);
977
978 if (!ifmgd->associated)
979 goto out;
980
981 if (!sdata->vif.csa_active)
982 goto out;
983
984 /*
985 * using reservation isn't immediate as it may be deferred until later
986 * with multi-vif. once reservation is complete it will re-schedule the
987 * work with no reserved_chanctx so verify chandef to check if it
988 * completed successfully
989 */
990
991 if (sdata->reserved_chanctx) {
992 /*
993 * with multi-vif csa driver may call ieee80211_csa_finish()
994 * many times while waiting for other interfaces to use their
995 * reservations
996 */
997 if (sdata->reserved_ready)
998 goto out;
999
1000 ret = ieee80211_vif_use_reserved_context(sdata);
1001 if (ret) {
1002 sdata_info(sdata,
1003 "failed to use reserved channel context, disconnecting (err=%d)\n",
1004 ret);
1005 ieee80211_queue_work(&sdata->local->hw,
1006 &ifmgd->csa_connection_drop_work);
1007 goto out;
1008 }
1009
1010 goto out;
1011 }
1012
1013 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1014 &sdata->csa_chandef)) {
1015 sdata_info(sdata,
1016 "failed to finalize channel switch, disconnecting\n");
1017 ieee80211_queue_work(&sdata->local->hw,
1018 &ifmgd->csa_connection_drop_work);
1019 goto out;
1020 }
1021
1022 /* XXX: shouldn't really modify cfg80211-owned data! */
1023 ifmgd->associated->channel = sdata->csa_chandef.chan;
1024
1025 ifmgd->csa_waiting_bcn = true;
1026
1027 ieee80211_sta_reset_beacon_monitor(sdata);
1028 ieee80211_sta_reset_conn_monitor(sdata);
1029
1030 out:
1031 mutex_unlock(&local->chanctx_mtx);
1032 mutex_unlock(&local->mtx);
1033 sdata_unlock(sdata);
1034 }
1035
1036 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1037 {
1038 struct ieee80211_local *local = sdata->local;
1039 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1040 int ret;
1041
1042 sdata_assert_lock(sdata);
1043
1044 WARN_ON(!sdata->vif.csa_active);
1045
1046 if (sdata->csa_block_tx) {
1047 ieee80211_wake_vif_queues(local, sdata,
1048 IEEE80211_QUEUE_STOP_REASON_CSA);
1049 sdata->csa_block_tx = false;
1050 }
1051
1052 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1053
1054 sdata->vif.csa_active = false;
1055 ifmgd->csa_waiting_bcn = false;
1056
1057 ret = drv_post_channel_switch(sdata);
1058 if (ret) {
1059 sdata_info(sdata,
1060 "driver post channel switch failed, disconnecting\n");
1061 ieee80211_queue_work(&local->hw,
1062 &ifmgd->csa_connection_drop_work);
1063 return;
1064 }
1065 }
1066
1067 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1068 {
1069 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1070 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1071
1072 trace_api_chswitch_done(sdata, success);
1073 if (!success) {
1074 sdata_info(sdata,
1075 "driver channel switch failed, disconnecting\n");
1076 ieee80211_queue_work(&sdata->local->hw,
1077 &ifmgd->csa_connection_drop_work);
1078 } else {
1079 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1080 }
1081 }
1082 EXPORT_SYMBOL(ieee80211_chswitch_done);
1083
1084 static void ieee80211_chswitch_timer(unsigned long data)
1085 {
1086 struct ieee80211_sub_if_data *sdata =
1087 (struct ieee80211_sub_if_data *) data;
1088
1089 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1090 }
1091
1092 static void
1093 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1094 u64 timestamp, u32 device_timestamp,
1095 struct ieee802_11_elems *elems,
1096 bool beacon)
1097 {
1098 struct ieee80211_local *local = sdata->local;
1099 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1100 struct cfg80211_bss *cbss = ifmgd->associated;
1101 struct ieee80211_chanctx_conf *conf;
1102 struct ieee80211_chanctx *chanctx;
1103 enum ieee80211_band current_band;
1104 struct ieee80211_csa_ie csa_ie;
1105 struct ieee80211_channel_switch ch_switch;
1106 int res;
1107
1108 sdata_assert_lock(sdata);
1109
1110 if (!cbss)
1111 return;
1112
1113 if (local->scanning)
1114 return;
1115
1116 /* disregard subsequent announcements if we are already processing */
1117 if (sdata->vif.csa_active)
1118 return;
1119
1120 current_band = cbss->channel->band;
1121 memset(&csa_ie, 0, sizeof(csa_ie));
1122 res = ieee80211_parse_ch_switch_ie(sdata, elems, beacon, current_band,
1123 ifmgd->flags,
1124 ifmgd->associated->bssid, &csa_ie);
1125 if (res < 0)
1126 ieee80211_queue_work(&local->hw,
1127 &ifmgd->csa_connection_drop_work);
1128 if (res)
1129 return;
1130
1131 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1132 IEEE80211_CHAN_DISABLED)) {
1133 sdata_info(sdata,
1134 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1135 ifmgd->associated->bssid,
1136 csa_ie.chandef.chan->center_freq,
1137 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1138 csa_ie.chandef.center_freq2);
1139 ieee80211_queue_work(&local->hw,
1140 &ifmgd->csa_connection_drop_work);
1141 return;
1142 }
1143
1144 mutex_lock(&local->mtx);
1145 mutex_lock(&local->chanctx_mtx);
1146 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1147 lockdep_is_held(&local->chanctx_mtx));
1148 if (!conf) {
1149 sdata_info(sdata,
1150 "no channel context assigned to vif?, disconnecting\n");
1151 ieee80211_queue_work(&local->hw,
1152 &ifmgd->csa_connection_drop_work);
1153 mutex_unlock(&local->chanctx_mtx);
1154 mutex_unlock(&local->mtx);
1155 return;
1156 }
1157
1158 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1159
1160 if (local->use_chanctx &&
1161 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1162 sdata_info(sdata,
1163 "driver doesn't support chan-switch with channel contexts\n");
1164 ieee80211_queue_work(&local->hw,
1165 &ifmgd->csa_connection_drop_work);
1166 mutex_unlock(&local->chanctx_mtx);
1167 mutex_unlock(&local->mtx);
1168 return;
1169 }
1170
1171 ch_switch.timestamp = timestamp;
1172 ch_switch.device_timestamp = device_timestamp;
1173 ch_switch.block_tx = csa_ie.mode;
1174 ch_switch.chandef = csa_ie.chandef;
1175 ch_switch.count = csa_ie.count;
1176
1177 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1178 sdata_info(sdata,
1179 "preparing for channel switch failed, disconnecting\n");
1180 ieee80211_queue_work(&local->hw,
1181 &ifmgd->csa_connection_drop_work);
1182 mutex_unlock(&local->chanctx_mtx);
1183 mutex_unlock(&local->mtx);
1184 return;
1185 }
1186
1187 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1188 chanctx->mode, false);
1189 if (res) {
1190 sdata_info(sdata,
1191 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1192 res);
1193 ieee80211_queue_work(&local->hw,
1194 &ifmgd->csa_connection_drop_work);
1195 mutex_unlock(&local->chanctx_mtx);
1196 mutex_unlock(&local->mtx);
1197 return;
1198 }
1199 mutex_unlock(&local->chanctx_mtx);
1200
1201 sdata->vif.csa_active = true;
1202 sdata->csa_chandef = csa_ie.chandef;
1203 sdata->csa_block_tx = csa_ie.mode;
1204
1205 if (sdata->csa_block_tx)
1206 ieee80211_stop_vif_queues(local, sdata,
1207 IEEE80211_QUEUE_STOP_REASON_CSA);
1208 mutex_unlock(&local->mtx);
1209
1210 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1211 csa_ie.count);
1212
1213 if (local->ops->channel_switch) {
1214 /* use driver's channel switch callback */
1215 drv_channel_switch(local, sdata, &ch_switch);
1216 return;
1217 }
1218
1219 /* channel switch handled in software */
1220 if (csa_ie.count <= 1)
1221 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1222 else
1223 mod_timer(&ifmgd->chswitch_timer,
1224 TU_TO_EXP_TIME(csa_ie.count * cbss->beacon_interval));
1225 }
1226
1227 static bool
1228 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1229 struct ieee80211_channel *channel,
1230 const u8 *country_ie, u8 country_ie_len,
1231 const u8 *pwr_constr_elem,
1232 int *chan_pwr, int *pwr_reduction)
1233 {
1234 struct ieee80211_country_ie_triplet *triplet;
1235 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1236 int i, chan_increment;
1237 bool have_chan_pwr = false;
1238
1239 /* Invalid IE */
1240 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1241 return false;
1242
1243 triplet = (void *)(country_ie + 3);
1244 country_ie_len -= 3;
1245
1246 switch (channel->band) {
1247 default:
1248 WARN_ON_ONCE(1);
1249 /* fall through */
1250 case IEEE80211_BAND_2GHZ:
1251 case IEEE80211_BAND_60GHZ:
1252 chan_increment = 1;
1253 break;
1254 case IEEE80211_BAND_5GHZ:
1255 chan_increment = 4;
1256 break;
1257 }
1258
1259 /* find channel */
1260 while (country_ie_len >= 3) {
1261 u8 first_channel = triplet->chans.first_channel;
1262
1263 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1264 goto next;
1265
1266 for (i = 0; i < triplet->chans.num_channels; i++) {
1267 if (first_channel + i * chan_increment == chan) {
1268 have_chan_pwr = true;
1269 *chan_pwr = triplet->chans.max_power;
1270 break;
1271 }
1272 }
1273 if (have_chan_pwr)
1274 break;
1275
1276 next:
1277 triplet++;
1278 country_ie_len -= 3;
1279 }
1280
1281 if (have_chan_pwr)
1282 *pwr_reduction = *pwr_constr_elem;
1283 return have_chan_pwr;
1284 }
1285
1286 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1287 struct ieee80211_channel *channel,
1288 const u8 *cisco_dtpc_ie,
1289 int *pwr_level)
1290 {
1291 /* From practical testing, the first data byte of the DTPC element
1292 * seems to contain the requested dBm level, and the CLI on Cisco
1293 * APs clearly state the range is -127 to 127 dBm, which indicates
1294 * a signed byte, although it seemingly never actually goes negative.
1295 * The other byte seems to always be zero.
1296 */
1297 *pwr_level = (__s8)cisco_dtpc_ie[4];
1298 }
1299
1300 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1301 struct ieee80211_channel *channel,
1302 struct ieee80211_mgmt *mgmt,
1303 const u8 *country_ie, u8 country_ie_len,
1304 const u8 *pwr_constr_ie,
1305 const u8 *cisco_dtpc_ie)
1306 {
1307 bool has_80211h_pwr = false, has_cisco_pwr = false;
1308 int chan_pwr = 0, pwr_reduction_80211h = 0;
1309 int pwr_level_cisco, pwr_level_80211h;
1310 int new_ap_level;
1311
1312 if (country_ie && pwr_constr_ie &&
1313 mgmt->u.probe_resp.capab_info &
1314 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT)) {
1315 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1316 sdata, channel, country_ie, country_ie_len,
1317 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1318 pwr_level_80211h =
1319 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1320 }
1321
1322 if (cisco_dtpc_ie) {
1323 ieee80211_find_cisco_dtpc(
1324 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1325 has_cisco_pwr = true;
1326 }
1327
1328 if (!has_80211h_pwr && !has_cisco_pwr)
1329 return 0;
1330
1331 /* If we have both 802.11h and Cisco DTPC, apply both limits
1332 * by picking the smallest of the two power levels advertised.
1333 */
1334 if (has_80211h_pwr &&
1335 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1336 sdata_info(sdata,
1337 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1338 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1339 sdata->u.mgd.bssid);
1340 new_ap_level = pwr_level_80211h;
1341 } else { /* has_cisco_pwr is always true here. */
1342 sdata_info(sdata,
1343 "Limiting TX power to %d dBm as advertised by %pM\n",
1344 pwr_level_cisco, sdata->u.mgd.bssid);
1345 new_ap_level = pwr_level_cisco;
1346 }
1347
1348 if (sdata->ap_power_level == new_ap_level)
1349 return 0;
1350
1351 sdata->ap_power_level = new_ap_level;
1352 if (__ieee80211_recalc_txpower(sdata))
1353 return BSS_CHANGED_TXPOWER;
1354 return 0;
1355 }
1356
1357 /* powersave */
1358 static void ieee80211_enable_ps(struct ieee80211_local *local,
1359 struct ieee80211_sub_if_data *sdata)
1360 {
1361 struct ieee80211_conf *conf = &local->hw.conf;
1362
1363 /*
1364 * If we are scanning right now then the parameters will
1365 * take effect when scan finishes.
1366 */
1367 if (local->scanning)
1368 return;
1369
1370 if (conf->dynamic_ps_timeout > 0 &&
1371 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1372 mod_timer(&local->dynamic_ps_timer, jiffies +
1373 msecs_to_jiffies(conf->dynamic_ps_timeout));
1374 } else {
1375 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1376 ieee80211_send_nullfunc(local, sdata, 1);
1377
1378 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1379 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1380 return;
1381
1382 conf->flags |= IEEE80211_CONF_PS;
1383 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1384 }
1385 }
1386
1387 static void ieee80211_change_ps(struct ieee80211_local *local)
1388 {
1389 struct ieee80211_conf *conf = &local->hw.conf;
1390
1391 if (local->ps_sdata) {
1392 ieee80211_enable_ps(local, local->ps_sdata);
1393 } else if (conf->flags & IEEE80211_CONF_PS) {
1394 conf->flags &= ~IEEE80211_CONF_PS;
1395 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1396 del_timer_sync(&local->dynamic_ps_timer);
1397 cancel_work_sync(&local->dynamic_ps_enable_work);
1398 }
1399 }
1400
1401 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1402 {
1403 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1404 struct sta_info *sta = NULL;
1405 bool authorized = false;
1406
1407 if (!mgd->powersave)
1408 return false;
1409
1410 if (mgd->broken_ap)
1411 return false;
1412
1413 if (!mgd->associated)
1414 return false;
1415
1416 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1417 return false;
1418
1419 if (!mgd->have_beacon)
1420 return false;
1421
1422 rcu_read_lock();
1423 sta = sta_info_get(sdata, mgd->bssid);
1424 if (sta)
1425 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1426 rcu_read_unlock();
1427
1428 return authorized;
1429 }
1430
1431 /* need to hold RTNL or interface lock */
1432 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1433 {
1434 struct ieee80211_sub_if_data *sdata, *found = NULL;
1435 int count = 0;
1436 int timeout;
1437
1438 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1439 local->ps_sdata = NULL;
1440 return;
1441 }
1442
1443 list_for_each_entry(sdata, &local->interfaces, list) {
1444 if (!ieee80211_sdata_running(sdata))
1445 continue;
1446 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1447 /* If an AP vif is found, then disable PS
1448 * by setting the count to zero thereby setting
1449 * ps_sdata to NULL.
1450 */
1451 count = 0;
1452 break;
1453 }
1454 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1455 continue;
1456 found = sdata;
1457 count++;
1458 }
1459
1460 if (count == 1 && ieee80211_powersave_allowed(found)) {
1461 s32 beaconint_us;
1462
1463 if (latency < 0)
1464 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1465
1466 beaconint_us = ieee80211_tu_to_usec(
1467 found->vif.bss_conf.beacon_int);
1468
1469 timeout = local->dynamic_ps_forced_timeout;
1470 if (timeout < 0) {
1471 /*
1472 * Go to full PSM if the user configures a very low
1473 * latency requirement.
1474 * The 2000 second value is there for compatibility
1475 * until the PM_QOS_NETWORK_LATENCY is configured
1476 * with real values.
1477 */
1478 if (latency > (1900 * USEC_PER_MSEC) &&
1479 latency != (2000 * USEC_PER_SEC))
1480 timeout = 0;
1481 else
1482 timeout = 100;
1483 }
1484 local->hw.conf.dynamic_ps_timeout = timeout;
1485
1486 if (beaconint_us > latency) {
1487 local->ps_sdata = NULL;
1488 } else {
1489 int maxslp = 1;
1490 u8 dtimper = found->u.mgd.dtim_period;
1491
1492 /* If the TIM IE is invalid, pretend the value is 1 */
1493 if (!dtimper)
1494 dtimper = 1;
1495 else if (dtimper > 1)
1496 maxslp = min_t(int, dtimper,
1497 latency / beaconint_us);
1498
1499 local->hw.conf.max_sleep_period = maxslp;
1500 local->hw.conf.ps_dtim_period = dtimper;
1501 local->ps_sdata = found;
1502 }
1503 } else {
1504 local->ps_sdata = NULL;
1505 }
1506
1507 ieee80211_change_ps(local);
1508 }
1509
1510 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1511 {
1512 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1513
1514 if (sdata->vif.bss_conf.ps != ps_allowed) {
1515 sdata->vif.bss_conf.ps = ps_allowed;
1516 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1517 }
1518 }
1519
1520 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1521 {
1522 struct ieee80211_local *local =
1523 container_of(work, struct ieee80211_local,
1524 dynamic_ps_disable_work);
1525
1526 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1527 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1528 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1529 }
1530
1531 ieee80211_wake_queues_by_reason(&local->hw,
1532 IEEE80211_MAX_QUEUE_MAP,
1533 IEEE80211_QUEUE_STOP_REASON_PS,
1534 false);
1535 }
1536
1537 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1538 {
1539 struct ieee80211_local *local =
1540 container_of(work, struct ieee80211_local,
1541 dynamic_ps_enable_work);
1542 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1543 struct ieee80211_if_managed *ifmgd;
1544 unsigned long flags;
1545 int q;
1546
1547 /* can only happen when PS was just disabled anyway */
1548 if (!sdata)
1549 return;
1550
1551 ifmgd = &sdata->u.mgd;
1552
1553 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1554 return;
1555
1556 if (local->hw.conf.dynamic_ps_timeout > 0) {
1557 /* don't enter PS if TX frames are pending */
1558 if (drv_tx_frames_pending(local)) {
1559 mod_timer(&local->dynamic_ps_timer, jiffies +
1560 msecs_to_jiffies(
1561 local->hw.conf.dynamic_ps_timeout));
1562 return;
1563 }
1564
1565 /*
1566 * transmission can be stopped by others which leads to
1567 * dynamic_ps_timer expiry. Postpone the ps timer if it
1568 * is not the actual idle state.
1569 */
1570 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1571 for (q = 0; q < local->hw.queues; q++) {
1572 if (local->queue_stop_reasons[q]) {
1573 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1574 flags);
1575 mod_timer(&local->dynamic_ps_timer, jiffies +
1576 msecs_to_jiffies(
1577 local->hw.conf.dynamic_ps_timeout));
1578 return;
1579 }
1580 }
1581 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1582 }
1583
1584 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1585 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1586 if (drv_tx_frames_pending(local)) {
1587 mod_timer(&local->dynamic_ps_timer, jiffies +
1588 msecs_to_jiffies(
1589 local->hw.conf.dynamic_ps_timeout));
1590 } else {
1591 ieee80211_send_nullfunc(local, sdata, 1);
1592 /* Flush to get the tx status of nullfunc frame */
1593 ieee80211_flush_queues(local, sdata);
1594 }
1595 }
1596
1597 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1598 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1599 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1600 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1601 local->hw.conf.flags |= IEEE80211_CONF_PS;
1602 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1603 }
1604 }
1605
1606 void ieee80211_dynamic_ps_timer(unsigned long data)
1607 {
1608 struct ieee80211_local *local = (void *) data;
1609
1610 if (local->quiescing || local->suspended)
1611 return;
1612
1613 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1614 }
1615
1616 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1617 {
1618 struct delayed_work *delayed_work =
1619 container_of(work, struct delayed_work, work);
1620 struct ieee80211_sub_if_data *sdata =
1621 container_of(delayed_work, struct ieee80211_sub_if_data,
1622 dfs_cac_timer_work);
1623 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1624
1625 mutex_lock(&sdata->local->mtx);
1626 if (sdata->wdev.cac_started) {
1627 ieee80211_vif_release_channel(sdata);
1628 cfg80211_cac_event(sdata->dev, &chandef,
1629 NL80211_RADAR_CAC_FINISHED,
1630 GFP_KERNEL);
1631 }
1632 mutex_unlock(&sdata->local->mtx);
1633 }
1634
1635 static bool
1636 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1637 {
1638 struct ieee80211_local *local = sdata->local;
1639 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1640 bool ret;
1641 int ac;
1642
1643 if (local->hw.queues < IEEE80211_NUM_ACS)
1644 return false;
1645
1646 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1647 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1648 int non_acm_ac;
1649 unsigned long now = jiffies;
1650
1651 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1652 tx_tspec->admitted_time &&
1653 time_after(now, tx_tspec->time_slice_start + HZ)) {
1654 tx_tspec->consumed_tx_time = 0;
1655 tx_tspec->time_slice_start = now;
1656
1657 if (tx_tspec->downgraded)
1658 tx_tspec->action =
1659 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1660 }
1661
1662 switch (tx_tspec->action) {
1663 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1664 /* take the original parameters */
1665 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1666 sdata_err(sdata,
1667 "failed to set TX queue parameters for queue %d\n",
1668 ac);
1669 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1670 tx_tspec->downgraded = false;
1671 ret = true;
1672 break;
1673 case TX_TSPEC_ACTION_DOWNGRADE:
1674 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1675 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1676 ret = true;
1677 break;
1678 }
1679 /* downgrade next lower non-ACM AC */
1680 for (non_acm_ac = ac + 1;
1681 non_acm_ac < IEEE80211_NUM_ACS;
1682 non_acm_ac++)
1683 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1684 break;
1685 /* The loop will result in using BK even if it requires
1686 * admission control, such configuration makes no sense
1687 * and we have to transmit somehow - the AC selection
1688 * does the same thing.
1689 */
1690 if (drv_conf_tx(local, sdata, ac,
1691 &sdata->tx_conf[non_acm_ac]))
1692 sdata_err(sdata,
1693 "failed to set TX queue parameters for queue %d\n",
1694 ac);
1695 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1696 ret = true;
1697 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1698 tx_tspec->time_slice_start + HZ - now + 1);
1699 break;
1700 case TX_TSPEC_ACTION_NONE:
1701 /* nothing now */
1702 break;
1703 }
1704 }
1705
1706 return ret;
1707 }
1708
1709 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1710 {
1711 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1712 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1713 }
1714
1715 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1716 {
1717 struct ieee80211_sub_if_data *sdata;
1718
1719 sdata = container_of(work, struct ieee80211_sub_if_data,
1720 u.mgd.tx_tspec_wk.work);
1721 ieee80211_sta_handle_tspec_ac_params(sdata);
1722 }
1723
1724 /* MLME */
1725 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1726 struct ieee80211_sub_if_data *sdata,
1727 const u8 *wmm_param, size_t wmm_param_len)
1728 {
1729 struct ieee80211_tx_queue_params params;
1730 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1731 size_t left;
1732 int count;
1733 const u8 *pos;
1734 u8 uapsd_queues = 0;
1735
1736 if (!local->ops->conf_tx)
1737 return false;
1738
1739 if (local->hw.queues < IEEE80211_NUM_ACS)
1740 return false;
1741
1742 if (!wmm_param)
1743 return false;
1744
1745 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1746 return false;
1747
1748 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1749 uapsd_queues = ifmgd->uapsd_queues;
1750
1751 count = wmm_param[6] & 0x0f;
1752 if (count == ifmgd->wmm_last_param_set)
1753 return false;
1754 ifmgd->wmm_last_param_set = count;
1755
1756 pos = wmm_param + 8;
1757 left = wmm_param_len - 8;
1758
1759 memset(&params, 0, sizeof(params));
1760
1761 sdata->wmm_acm = 0;
1762 for (; left >= 4; left -= 4, pos += 4) {
1763 int aci = (pos[0] >> 5) & 0x03;
1764 int acm = (pos[0] >> 4) & 0x01;
1765 bool uapsd = false;
1766 int queue;
1767
1768 switch (aci) {
1769 case 1: /* AC_BK */
1770 queue = 3;
1771 if (acm)
1772 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1773 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1774 uapsd = true;
1775 break;
1776 case 2: /* AC_VI */
1777 queue = 1;
1778 if (acm)
1779 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1780 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1781 uapsd = true;
1782 break;
1783 case 3: /* AC_VO */
1784 queue = 0;
1785 if (acm)
1786 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1787 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1788 uapsd = true;
1789 break;
1790 case 0: /* AC_BE */
1791 default:
1792 queue = 2;
1793 if (acm)
1794 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1795 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1796 uapsd = true;
1797 break;
1798 }
1799
1800 params.aifs = pos[0] & 0x0f;
1801 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1802 params.cw_min = ecw2cw(pos[1] & 0x0f);
1803 params.txop = get_unaligned_le16(pos + 2);
1804 params.acm = acm;
1805 params.uapsd = uapsd;
1806
1807 mlme_dbg(sdata,
1808 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1809 queue, aci, acm,
1810 params.aifs, params.cw_min, params.cw_max,
1811 params.txop, params.uapsd,
1812 ifmgd->tx_tspec[queue].downgraded);
1813 sdata->tx_conf[queue] = params;
1814 if (!ifmgd->tx_tspec[queue].downgraded &&
1815 drv_conf_tx(local, sdata, queue, &params))
1816 sdata_err(sdata,
1817 "failed to set TX queue parameters for queue %d\n",
1818 queue);
1819 }
1820
1821 /* enable WMM or activate new settings */
1822 sdata->vif.bss_conf.qos = true;
1823 return true;
1824 }
1825
1826 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1827 {
1828 lockdep_assert_held(&sdata->local->mtx);
1829
1830 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1831 ieee80211_run_deferred_scan(sdata->local);
1832 }
1833
1834 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1835 {
1836 mutex_lock(&sdata->local->mtx);
1837 __ieee80211_stop_poll(sdata);
1838 mutex_unlock(&sdata->local->mtx);
1839 }
1840
1841 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1842 u16 capab, bool erp_valid, u8 erp)
1843 {
1844 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1845 u32 changed = 0;
1846 bool use_protection;
1847 bool use_short_preamble;
1848 bool use_short_slot;
1849
1850 if (erp_valid) {
1851 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1852 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1853 } else {
1854 use_protection = false;
1855 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1856 }
1857
1858 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1859 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1860 use_short_slot = true;
1861
1862 if (use_protection != bss_conf->use_cts_prot) {
1863 bss_conf->use_cts_prot = use_protection;
1864 changed |= BSS_CHANGED_ERP_CTS_PROT;
1865 }
1866
1867 if (use_short_preamble != bss_conf->use_short_preamble) {
1868 bss_conf->use_short_preamble = use_short_preamble;
1869 changed |= BSS_CHANGED_ERP_PREAMBLE;
1870 }
1871
1872 if (use_short_slot != bss_conf->use_short_slot) {
1873 bss_conf->use_short_slot = use_short_slot;
1874 changed |= BSS_CHANGED_ERP_SLOT;
1875 }
1876
1877 return changed;
1878 }
1879
1880 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1881 struct cfg80211_bss *cbss,
1882 u32 bss_info_changed)
1883 {
1884 struct ieee80211_bss *bss = (void *)cbss->priv;
1885 struct ieee80211_local *local = sdata->local;
1886 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1887
1888 bss_info_changed |= BSS_CHANGED_ASSOC;
1889 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1890 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1891
1892 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1893 beacon_loss_count * bss_conf->beacon_int));
1894
1895 sdata->u.mgd.associated = cbss;
1896 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1897
1898 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1899
1900 if (sdata->vif.p2p) {
1901 const struct cfg80211_bss_ies *ies;
1902
1903 rcu_read_lock();
1904 ies = rcu_dereference(cbss->ies);
1905 if (ies) {
1906 int ret;
1907
1908 ret = cfg80211_get_p2p_attr(
1909 ies->data, ies->len,
1910 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1911 (u8 *) &bss_conf->p2p_noa_attr,
1912 sizeof(bss_conf->p2p_noa_attr));
1913 if (ret >= 2) {
1914 sdata->u.mgd.p2p_noa_index =
1915 bss_conf->p2p_noa_attr.index;
1916 bss_info_changed |= BSS_CHANGED_P2P_PS;
1917 }
1918 }
1919 rcu_read_unlock();
1920 }
1921
1922 /* just to be sure */
1923 ieee80211_stop_poll(sdata);
1924
1925 ieee80211_led_assoc(local, 1);
1926
1927 if (sdata->u.mgd.have_beacon) {
1928 /*
1929 * If the AP is buggy we may get here with no DTIM period
1930 * known, so assume it's 1 which is the only safe assumption
1931 * in that case, although if the TIM IE is broken powersave
1932 * probably just won't work at all.
1933 */
1934 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1935 bss_conf->beacon_rate = bss->beacon_rate;
1936 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1937 } else {
1938 bss_conf->beacon_rate = NULL;
1939 bss_conf->dtim_period = 0;
1940 }
1941
1942 bss_conf->assoc = 1;
1943
1944 /* Tell the driver to monitor connection quality (if supported) */
1945 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1946 bss_conf->cqm_rssi_thold)
1947 bss_info_changed |= BSS_CHANGED_CQM;
1948
1949 /* Enable ARP filtering */
1950 if (bss_conf->arp_addr_cnt)
1951 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1952
1953 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1954
1955 mutex_lock(&local->iflist_mtx);
1956 ieee80211_recalc_ps(local, -1);
1957 mutex_unlock(&local->iflist_mtx);
1958
1959 ieee80211_recalc_smps(sdata);
1960 ieee80211_recalc_ps_vif(sdata);
1961
1962 netif_carrier_on(sdata->dev);
1963 }
1964
1965 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1966 u16 stype, u16 reason, bool tx,
1967 u8 *frame_buf)
1968 {
1969 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1970 struct ieee80211_local *local = sdata->local;
1971 u32 changed = 0;
1972
1973 sdata_assert_lock(sdata);
1974
1975 if (WARN_ON_ONCE(tx && !frame_buf))
1976 return;
1977
1978 if (WARN_ON(!ifmgd->associated))
1979 return;
1980
1981 ieee80211_stop_poll(sdata);
1982
1983 ifmgd->associated = NULL;
1984 netif_carrier_off(sdata->dev);
1985
1986 /*
1987 * if we want to get out of ps before disassoc (why?) we have
1988 * to do it before sending disassoc, as otherwise the null-packet
1989 * won't be valid.
1990 */
1991 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1992 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1993 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1994 }
1995 local->ps_sdata = NULL;
1996
1997 /* disable per-vif ps */
1998 ieee80211_recalc_ps_vif(sdata);
1999
2000 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
2001 if (tx)
2002 ieee80211_flush_queues(local, sdata);
2003
2004 /* deauthenticate/disassociate now */
2005 if (tx || frame_buf)
2006 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2007 reason, tx, frame_buf);
2008
2009 /* flush out frame */
2010 if (tx)
2011 ieee80211_flush_queues(local, sdata);
2012
2013 /* clear bssid only after building the needed mgmt frames */
2014 memset(ifmgd->bssid, 0, ETH_ALEN);
2015
2016 /* remove AP and TDLS peers */
2017 sta_info_flush(sdata);
2018
2019 /* finally reset all BSS / config parameters */
2020 changed |= ieee80211_reset_erp_info(sdata);
2021
2022 ieee80211_led_assoc(local, 0);
2023 changed |= BSS_CHANGED_ASSOC;
2024 sdata->vif.bss_conf.assoc = false;
2025
2026 ifmgd->p2p_noa_index = -1;
2027 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2028 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2029
2030 /* on the next assoc, re-program HT/VHT parameters */
2031 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2032 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2033 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2034 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2035
2036 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2037
2038 del_timer_sync(&local->dynamic_ps_timer);
2039 cancel_work_sync(&local->dynamic_ps_enable_work);
2040
2041 /* Disable ARP filtering */
2042 if (sdata->vif.bss_conf.arp_addr_cnt)
2043 changed |= BSS_CHANGED_ARP_FILTER;
2044
2045 sdata->vif.bss_conf.qos = false;
2046 changed |= BSS_CHANGED_QOS;
2047
2048 /* The BSSID (not really interesting) and HT changed */
2049 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2050 ieee80211_bss_info_change_notify(sdata, changed);
2051
2052 /* disassociated - set to defaults now */
2053 ieee80211_set_wmm_default(sdata, false);
2054
2055 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2056 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2057 del_timer_sync(&sdata->u.mgd.timer);
2058 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2059
2060 sdata->vif.bss_conf.dtim_period = 0;
2061 sdata->vif.bss_conf.beacon_rate = NULL;
2062
2063 ifmgd->have_beacon = false;
2064
2065 ifmgd->flags = 0;
2066 mutex_lock(&local->mtx);
2067 ieee80211_vif_release_channel(sdata);
2068
2069 sdata->vif.csa_active = false;
2070 ifmgd->csa_waiting_bcn = false;
2071 if (sdata->csa_block_tx) {
2072 ieee80211_wake_vif_queues(local, sdata,
2073 IEEE80211_QUEUE_STOP_REASON_CSA);
2074 sdata->csa_block_tx = false;
2075 }
2076 mutex_unlock(&local->mtx);
2077
2078 /* existing TX TSPEC sessions no longer exist */
2079 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2080 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2081
2082 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2083 }
2084
2085 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2086 struct ieee80211_hdr *hdr)
2087 {
2088 /*
2089 * We can postpone the mgd.timer whenever receiving unicast frames
2090 * from AP because we know that the connection is working both ways
2091 * at that time. But multicast frames (and hence also beacons) must
2092 * be ignored here, because we need to trigger the timer during
2093 * data idle periods for sending the periodic probe request to the
2094 * AP we're connected to.
2095 */
2096 if (is_multicast_ether_addr(hdr->addr1))
2097 return;
2098
2099 ieee80211_sta_reset_conn_monitor(sdata);
2100 }
2101
2102 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2103 {
2104 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2105 struct ieee80211_local *local = sdata->local;
2106
2107 mutex_lock(&local->mtx);
2108 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2109 goto out;
2110
2111 __ieee80211_stop_poll(sdata);
2112
2113 mutex_lock(&local->iflist_mtx);
2114 ieee80211_recalc_ps(local, -1);
2115 mutex_unlock(&local->iflist_mtx);
2116
2117 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
2118 goto out;
2119
2120 /*
2121 * We've received a probe response, but are not sure whether
2122 * we have or will be receiving any beacons or data, so let's
2123 * schedule the timers again, just in case.
2124 */
2125 ieee80211_sta_reset_beacon_monitor(sdata);
2126
2127 mod_timer(&ifmgd->conn_mon_timer,
2128 round_jiffies_up(jiffies +
2129 IEEE80211_CONNECTION_IDLE_TIME));
2130 out:
2131 mutex_unlock(&local->mtx);
2132 }
2133
2134 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2135 struct ieee80211_hdr *hdr,
2136 u16 tx_time)
2137 {
2138 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2139 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2140 int ac = ieee80211_ac_from_tid(tid);
2141 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2142 unsigned long now = jiffies;
2143
2144 if (likely(!tx_tspec->admitted_time))
2145 return;
2146
2147 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2148 tx_tspec->consumed_tx_time = 0;
2149 tx_tspec->time_slice_start = now;
2150
2151 if (tx_tspec->downgraded) {
2152 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2153 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2154 }
2155 }
2156
2157 if (tx_tspec->downgraded)
2158 return;
2159
2160 tx_tspec->consumed_tx_time += tx_time;
2161
2162 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2163 tx_tspec->downgraded = true;
2164 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2165 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2166 }
2167 }
2168
2169 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2170 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2171 {
2172 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2173
2174 if (!ieee80211_is_data(hdr->frame_control))
2175 return;
2176
2177 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2178 sdata->u.mgd.probe_send_count > 0) {
2179 if (ack)
2180 ieee80211_sta_reset_conn_monitor(sdata);
2181 else
2182 sdata->u.mgd.nullfunc_failed = true;
2183 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2184 return;
2185 }
2186
2187 if (ack)
2188 ieee80211_sta_reset_conn_monitor(sdata);
2189 }
2190
2191 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2192 {
2193 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2194 const u8 *ssid;
2195 u8 *dst = ifmgd->associated->bssid;
2196 u8 unicast_limit = max(1, max_probe_tries - 3);
2197
2198 /*
2199 * Try sending broadcast probe requests for the last three
2200 * probe requests after the first ones failed since some
2201 * buggy APs only support broadcast probe requests.
2202 */
2203 if (ifmgd->probe_send_count >= unicast_limit)
2204 dst = NULL;
2205
2206 /*
2207 * When the hardware reports an accurate Tx ACK status, it's
2208 * better to send a nullfunc frame instead of a probe request,
2209 * as it will kick us off the AP quickly if we aren't associated
2210 * anymore. The timeout will be reset if the frame is ACKed by
2211 * the AP.
2212 */
2213 ifmgd->probe_send_count++;
2214
2215 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2216 ifmgd->nullfunc_failed = false;
2217 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2218 } else {
2219 int ssid_len;
2220
2221 rcu_read_lock();
2222 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2223 if (WARN_ON_ONCE(ssid == NULL))
2224 ssid_len = 0;
2225 else
2226 ssid_len = ssid[1];
2227
2228 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
2229 0, (u32) -1, true, 0,
2230 ifmgd->associated->channel, false);
2231 rcu_read_unlock();
2232 }
2233
2234 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2235 run_again(sdata, ifmgd->probe_timeout);
2236 }
2237
2238 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2239 bool beacon)
2240 {
2241 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2242 bool already = false;
2243
2244 if (!ieee80211_sdata_running(sdata))
2245 return;
2246
2247 sdata_lock(sdata);
2248
2249 if (!ifmgd->associated)
2250 goto out;
2251
2252 mutex_lock(&sdata->local->mtx);
2253
2254 if (sdata->local->tmp_channel || sdata->local->scanning) {
2255 mutex_unlock(&sdata->local->mtx);
2256 goto out;
2257 }
2258
2259 if (beacon) {
2260 mlme_dbg_ratelimited(sdata,
2261 "detected beacon loss from AP (missed %d beacons) - probing\n",
2262 beacon_loss_count);
2263
2264 ieee80211_cqm_rssi_notify(&sdata->vif,
2265 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2266 GFP_KERNEL);
2267 }
2268
2269 /*
2270 * The driver/our work has already reported this event or the
2271 * connection monitoring has kicked in and we have already sent
2272 * a probe request. Or maybe the AP died and the driver keeps
2273 * reporting until we disassociate...
2274 *
2275 * In either case we have to ignore the current call to this
2276 * function (except for setting the correct probe reason bit)
2277 * because otherwise we would reset the timer every time and
2278 * never check whether we received a probe response!
2279 */
2280 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2281 already = true;
2282
2283 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2284
2285 mutex_unlock(&sdata->local->mtx);
2286
2287 if (already)
2288 goto out;
2289
2290 mutex_lock(&sdata->local->iflist_mtx);
2291 ieee80211_recalc_ps(sdata->local, -1);
2292 mutex_unlock(&sdata->local->iflist_mtx);
2293
2294 ifmgd->probe_send_count = 0;
2295 ieee80211_mgd_probe_ap_send(sdata);
2296 out:
2297 sdata_unlock(sdata);
2298 }
2299
2300 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2301 struct ieee80211_vif *vif)
2302 {
2303 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2304 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2305 struct cfg80211_bss *cbss;
2306 struct sk_buff *skb;
2307 const u8 *ssid;
2308 int ssid_len;
2309
2310 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2311 return NULL;
2312
2313 sdata_assert_lock(sdata);
2314
2315 if (ifmgd->associated)
2316 cbss = ifmgd->associated;
2317 else if (ifmgd->auth_data)
2318 cbss = ifmgd->auth_data->bss;
2319 else if (ifmgd->assoc_data)
2320 cbss = ifmgd->assoc_data->bss;
2321 else
2322 return NULL;
2323
2324 rcu_read_lock();
2325 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2326 if (WARN_ON_ONCE(ssid == NULL))
2327 ssid_len = 0;
2328 else
2329 ssid_len = ssid[1];
2330
2331 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
2332 (u32) -1, cbss->channel,
2333 ssid + 2, ssid_len,
2334 NULL, 0, true);
2335 rcu_read_unlock();
2336
2337 return skb;
2338 }
2339 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2340
2341 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2342 {
2343 struct ieee80211_local *local = sdata->local;
2344 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2345 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2346
2347 sdata_lock(sdata);
2348 if (!ifmgd->associated) {
2349 sdata_unlock(sdata);
2350 return;
2351 }
2352
2353 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2354 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2355 true, frame_buf);
2356 mutex_lock(&local->mtx);
2357 sdata->vif.csa_active = false;
2358 ifmgd->csa_waiting_bcn = false;
2359 if (sdata->csa_block_tx) {
2360 ieee80211_wake_vif_queues(local, sdata,
2361 IEEE80211_QUEUE_STOP_REASON_CSA);
2362 sdata->csa_block_tx = false;
2363 }
2364 mutex_unlock(&local->mtx);
2365
2366 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2367 IEEE80211_DEAUTH_FRAME_LEN);
2368 sdata_unlock(sdata);
2369 }
2370
2371 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2372 {
2373 struct ieee80211_sub_if_data *sdata =
2374 container_of(work, struct ieee80211_sub_if_data,
2375 u.mgd.beacon_connection_loss_work);
2376 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2377 struct sta_info *sta;
2378
2379 if (ifmgd->associated) {
2380 rcu_read_lock();
2381 sta = sta_info_get(sdata, ifmgd->bssid);
2382 if (sta)
2383 sta->beacon_loss_count++;
2384 rcu_read_unlock();
2385 }
2386
2387 if (ifmgd->connection_loss) {
2388 sdata_info(sdata, "Connection to AP %pM lost\n",
2389 ifmgd->bssid);
2390 __ieee80211_disconnect(sdata);
2391 } else {
2392 ieee80211_mgd_probe_ap(sdata, true);
2393 }
2394 }
2395
2396 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2397 {
2398 struct ieee80211_sub_if_data *sdata =
2399 container_of(work, struct ieee80211_sub_if_data,
2400 u.mgd.csa_connection_drop_work);
2401
2402 __ieee80211_disconnect(sdata);
2403 }
2404
2405 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2406 {
2407 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2408 struct ieee80211_hw *hw = &sdata->local->hw;
2409
2410 trace_api_beacon_loss(sdata);
2411
2412 sdata->u.mgd.connection_loss = false;
2413 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2414 }
2415 EXPORT_SYMBOL(ieee80211_beacon_loss);
2416
2417 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2418 {
2419 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2420 struct ieee80211_hw *hw = &sdata->local->hw;
2421
2422 trace_api_connection_loss(sdata);
2423
2424 sdata->u.mgd.connection_loss = true;
2425 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2426 }
2427 EXPORT_SYMBOL(ieee80211_connection_loss);
2428
2429
2430 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2431 bool assoc)
2432 {
2433 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2434
2435 sdata_assert_lock(sdata);
2436
2437 if (!assoc) {
2438 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2439
2440 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2441 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2442 sdata->u.mgd.flags = 0;
2443 mutex_lock(&sdata->local->mtx);
2444 ieee80211_vif_release_channel(sdata);
2445 mutex_unlock(&sdata->local->mtx);
2446 }
2447
2448 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2449 kfree(auth_data);
2450 sdata->u.mgd.auth_data = NULL;
2451 }
2452
2453 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2454 struct ieee80211_mgmt *mgmt, size_t len)
2455 {
2456 struct ieee80211_local *local = sdata->local;
2457 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2458 u8 *pos;
2459 struct ieee802_11_elems elems;
2460 u32 tx_flags = 0;
2461
2462 pos = mgmt->u.auth.variable;
2463 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2464 if (!elems.challenge)
2465 return;
2466 auth_data->expected_transaction = 4;
2467 drv_mgd_prepare_tx(sdata->local, sdata);
2468 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2469 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2470 IEEE80211_TX_INTFL_MLME_CONN_TX;
2471 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2472 elems.challenge - 2, elems.challenge_len + 2,
2473 auth_data->bss->bssid, auth_data->bss->bssid,
2474 auth_data->key, auth_data->key_len,
2475 auth_data->key_idx, tx_flags);
2476 }
2477
2478 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2479 struct ieee80211_mgmt *mgmt, size_t len)
2480 {
2481 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2482 u8 bssid[ETH_ALEN];
2483 u16 auth_alg, auth_transaction, status_code;
2484 struct sta_info *sta;
2485
2486 sdata_assert_lock(sdata);
2487
2488 if (len < 24 + 6)
2489 return;
2490
2491 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2492 return;
2493
2494 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2495
2496 if (!ether_addr_equal(bssid, mgmt->bssid))
2497 return;
2498
2499 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2500 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2501 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2502
2503 if (auth_alg != ifmgd->auth_data->algorithm ||
2504 auth_transaction != ifmgd->auth_data->expected_transaction) {
2505 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2506 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2507 auth_transaction,
2508 ifmgd->auth_data->expected_transaction);
2509 return;
2510 }
2511
2512 if (status_code != WLAN_STATUS_SUCCESS) {
2513 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2514 mgmt->sa, status_code);
2515 ieee80211_destroy_auth_data(sdata, false);
2516 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2517 return;
2518 }
2519
2520 switch (ifmgd->auth_data->algorithm) {
2521 case WLAN_AUTH_OPEN:
2522 case WLAN_AUTH_LEAP:
2523 case WLAN_AUTH_FT:
2524 case WLAN_AUTH_SAE:
2525 break;
2526 case WLAN_AUTH_SHARED_KEY:
2527 if (ifmgd->auth_data->expected_transaction != 4) {
2528 ieee80211_auth_challenge(sdata, mgmt, len);
2529 /* need another frame */
2530 return;
2531 }
2532 break;
2533 default:
2534 WARN_ONCE(1, "invalid auth alg %d",
2535 ifmgd->auth_data->algorithm);
2536 return;
2537 }
2538
2539 sdata_info(sdata, "authenticated\n");
2540 ifmgd->auth_data->done = true;
2541 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2542 ifmgd->auth_data->timeout_started = true;
2543 run_again(sdata, ifmgd->auth_data->timeout);
2544
2545 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2546 ifmgd->auth_data->expected_transaction != 2) {
2547 /*
2548 * Report auth frame to user space for processing since another
2549 * round of Authentication frames is still needed.
2550 */
2551 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2552 return;
2553 }
2554
2555 /* move station state to auth */
2556 mutex_lock(&sdata->local->sta_mtx);
2557 sta = sta_info_get(sdata, bssid);
2558 if (!sta) {
2559 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2560 goto out_err;
2561 }
2562 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2563 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2564 goto out_err;
2565 }
2566 mutex_unlock(&sdata->local->sta_mtx);
2567
2568 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2569 return;
2570 out_err:
2571 mutex_unlock(&sdata->local->sta_mtx);
2572 /* ignore frame -- wait for timeout */
2573 }
2574
2575 #define case_WLAN(type) \
2576 case WLAN_REASON_##type: return #type
2577
2578 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2579 {
2580 switch (reason_code) {
2581 case_WLAN(UNSPECIFIED);
2582 case_WLAN(PREV_AUTH_NOT_VALID);
2583 case_WLAN(DEAUTH_LEAVING);
2584 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2585 case_WLAN(DISASSOC_AP_BUSY);
2586 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2587 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2588 case_WLAN(DISASSOC_STA_HAS_LEFT);
2589 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2590 case_WLAN(DISASSOC_BAD_POWER);
2591 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2592 case_WLAN(INVALID_IE);
2593 case_WLAN(MIC_FAILURE);
2594 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2595 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2596 case_WLAN(IE_DIFFERENT);
2597 case_WLAN(INVALID_GROUP_CIPHER);
2598 case_WLAN(INVALID_PAIRWISE_CIPHER);
2599 case_WLAN(INVALID_AKMP);
2600 case_WLAN(UNSUPP_RSN_VERSION);
2601 case_WLAN(INVALID_RSN_IE_CAP);
2602 case_WLAN(IEEE8021X_FAILED);
2603 case_WLAN(CIPHER_SUITE_REJECTED);
2604 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2605 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2606 case_WLAN(DISASSOC_LOW_ACK);
2607 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2608 case_WLAN(QSTA_LEAVE_QBSS);
2609 case_WLAN(QSTA_NOT_USE);
2610 case_WLAN(QSTA_REQUIRE_SETUP);
2611 case_WLAN(QSTA_TIMEOUT);
2612 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2613 case_WLAN(MESH_PEER_CANCELED);
2614 case_WLAN(MESH_MAX_PEERS);
2615 case_WLAN(MESH_CONFIG);
2616 case_WLAN(MESH_CLOSE);
2617 case_WLAN(MESH_MAX_RETRIES);
2618 case_WLAN(MESH_CONFIRM_TIMEOUT);
2619 case_WLAN(MESH_INVALID_GTK);
2620 case_WLAN(MESH_INCONSISTENT_PARAM);
2621 case_WLAN(MESH_INVALID_SECURITY);
2622 case_WLAN(MESH_PATH_ERROR);
2623 case_WLAN(MESH_PATH_NOFORWARD);
2624 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2625 case_WLAN(MAC_EXISTS_IN_MBSS);
2626 case_WLAN(MESH_CHAN_REGULATORY);
2627 case_WLAN(MESH_CHAN);
2628 default: return "<unknown>";
2629 }
2630 }
2631
2632 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2633 struct ieee80211_mgmt *mgmt, size_t len)
2634 {
2635 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2636 const u8 *bssid = NULL;
2637 u16 reason_code;
2638
2639 sdata_assert_lock(sdata);
2640
2641 if (len < 24 + 2)
2642 return;
2643
2644 if (!ifmgd->associated ||
2645 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2646 return;
2647
2648 bssid = ifmgd->associated->bssid;
2649
2650 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2651
2652 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2653 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
2654
2655 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2656
2657 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2658 }
2659
2660
2661 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2662 struct ieee80211_mgmt *mgmt, size_t len)
2663 {
2664 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2665 u16 reason_code;
2666
2667 sdata_assert_lock(sdata);
2668
2669 if (len < 24 + 2)
2670 return;
2671
2672 if (!ifmgd->associated ||
2673 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2674 return;
2675
2676 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2677
2678 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2679 mgmt->sa, reason_code);
2680
2681 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2682
2683 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2684 }
2685
2686 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2687 u8 *supp_rates, unsigned int supp_rates_len,
2688 u32 *rates, u32 *basic_rates,
2689 bool *have_higher_than_11mbit,
2690 int *min_rate, int *min_rate_index,
2691 int shift, u32 rate_flags)
2692 {
2693 int i, j;
2694
2695 for (i = 0; i < supp_rates_len; i++) {
2696 int rate = supp_rates[i] & 0x7f;
2697 bool is_basic = !!(supp_rates[i] & 0x80);
2698
2699 if ((rate * 5 * (1 << shift)) > 110)
2700 *have_higher_than_11mbit = true;
2701
2702 /*
2703 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2704 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2705 *
2706 * Note: Even through the membership selector and the basic
2707 * rate flag share the same bit, they are not exactly
2708 * the same.
2709 */
2710 if (!!(supp_rates[i] & 0x80) &&
2711 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2712 continue;
2713
2714 for (j = 0; j < sband->n_bitrates; j++) {
2715 struct ieee80211_rate *br;
2716 int brate;
2717
2718 br = &sband->bitrates[j];
2719 if ((rate_flags & br->flags) != rate_flags)
2720 continue;
2721
2722 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2723 if (brate == rate) {
2724 *rates |= BIT(j);
2725 if (is_basic)
2726 *basic_rates |= BIT(j);
2727 if ((rate * 5) < *min_rate) {
2728 *min_rate = rate * 5;
2729 *min_rate_index = j;
2730 }
2731 break;
2732 }
2733 }
2734 }
2735 }
2736
2737 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2738 bool assoc)
2739 {
2740 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2741
2742 sdata_assert_lock(sdata);
2743
2744 if (!assoc) {
2745 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2746
2747 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2748 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2749 sdata->u.mgd.flags = 0;
2750 mutex_lock(&sdata->local->mtx);
2751 ieee80211_vif_release_channel(sdata);
2752 mutex_unlock(&sdata->local->mtx);
2753 }
2754
2755 kfree(assoc_data);
2756 sdata->u.mgd.assoc_data = NULL;
2757 }
2758
2759 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2760 struct cfg80211_bss *cbss,
2761 struct ieee80211_mgmt *mgmt, size_t len)
2762 {
2763 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2764 struct ieee80211_local *local = sdata->local;
2765 struct ieee80211_supported_band *sband;
2766 struct sta_info *sta;
2767 u8 *pos;
2768 u16 capab_info, aid;
2769 struct ieee802_11_elems elems;
2770 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2771 const struct cfg80211_bss_ies *bss_ies = NULL;
2772 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2773 u32 changed = 0;
2774 int err;
2775 bool ret;
2776
2777 /* AssocResp and ReassocResp have identical structure */
2778
2779 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2780 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2781
2782 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2783 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2784 aid);
2785 aid &= ~(BIT(15) | BIT(14));
2786
2787 ifmgd->broken_ap = false;
2788
2789 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2790 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2791 aid);
2792 aid = 0;
2793 ifmgd->broken_ap = true;
2794 }
2795
2796 pos = mgmt->u.assoc_resp.variable;
2797 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2798
2799 if (!elems.supp_rates) {
2800 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2801 return false;
2802 }
2803
2804 ifmgd->aid = aid;
2805 ifmgd->tdls_chan_switch_prohibited =
2806 elems.ext_capab && elems.ext_capab_len >= 5 &&
2807 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2808
2809 /*
2810 * Some APs are erroneously not including some information in their
2811 * (re)association response frames. Try to recover by using the data
2812 * from the beacon or probe response. This seems to afflict mobile
2813 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2814 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2815 */
2816 if ((assoc_data->wmm && !elems.wmm_param) ||
2817 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2818 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2819 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2820 (!elems.vht_cap_elem || !elems.vht_operation))) {
2821 const struct cfg80211_bss_ies *ies;
2822 struct ieee802_11_elems bss_elems;
2823
2824 rcu_read_lock();
2825 ies = rcu_dereference(cbss->ies);
2826 if (ies)
2827 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2828 GFP_ATOMIC);
2829 rcu_read_unlock();
2830 if (!bss_ies)
2831 return false;
2832
2833 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2834 false, &bss_elems);
2835 if (assoc_data->wmm &&
2836 !elems.wmm_param && bss_elems.wmm_param) {
2837 elems.wmm_param = bss_elems.wmm_param;
2838 sdata_info(sdata,
2839 "AP bug: WMM param missing from AssocResp\n");
2840 }
2841
2842 /*
2843 * Also check if we requested HT/VHT, otherwise the AP doesn't
2844 * have to include the IEs in the (re)association response.
2845 */
2846 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2847 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2848 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2849 sdata_info(sdata,
2850 "AP bug: HT capability missing from AssocResp\n");
2851 }
2852 if (!elems.ht_operation && bss_elems.ht_operation &&
2853 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2854 elems.ht_operation = bss_elems.ht_operation;
2855 sdata_info(sdata,
2856 "AP bug: HT operation missing from AssocResp\n");
2857 }
2858 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2859 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2860 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2861 sdata_info(sdata,
2862 "AP bug: VHT capa missing from AssocResp\n");
2863 }
2864 if (!elems.vht_operation && bss_elems.vht_operation &&
2865 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2866 elems.vht_operation = bss_elems.vht_operation;
2867 sdata_info(sdata,
2868 "AP bug: VHT operation missing from AssocResp\n");
2869 }
2870 }
2871
2872 /*
2873 * We previously checked these in the beacon/probe response, so
2874 * they should be present here. This is just a safety net.
2875 */
2876 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2877 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2878 sdata_info(sdata,
2879 "HT AP is missing WMM params or HT capability/operation\n");
2880 ret = false;
2881 goto out;
2882 }
2883
2884 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2885 (!elems.vht_cap_elem || !elems.vht_operation)) {
2886 sdata_info(sdata,
2887 "VHT AP is missing VHT capability/operation\n");
2888 ret = false;
2889 goto out;
2890 }
2891
2892 mutex_lock(&sdata->local->sta_mtx);
2893 /*
2894 * station info was already allocated and inserted before
2895 * the association and should be available to us
2896 */
2897 sta = sta_info_get(sdata, cbss->bssid);
2898 if (WARN_ON(!sta)) {
2899 mutex_unlock(&sdata->local->sta_mtx);
2900 ret = false;
2901 goto out;
2902 }
2903
2904 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2905
2906 /* Set up internal HT/VHT capabilities */
2907 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2908 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2909 elems.ht_cap_elem, sta);
2910
2911 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2912 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2913 elems.vht_cap_elem, sta);
2914
2915 /*
2916 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2917 * in their association response, so ignore that data for our own
2918 * configuration. If it changed since the last beacon, we'll get the
2919 * next beacon and update then.
2920 */
2921
2922 /*
2923 * If an operating mode notification IE is present, override the
2924 * NSS calculation (that would be done in rate_control_rate_init())
2925 * and use the # of streams from that element.
2926 */
2927 if (elems.opmode_notif &&
2928 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2929 u8 nss;
2930
2931 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2932 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2933 nss += 1;
2934 sta->sta.rx_nss = nss;
2935 }
2936
2937 rate_control_rate_init(sta);
2938
2939 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2940 set_sta_flag(sta, WLAN_STA_MFP);
2941
2942 sta->sta.wme = elems.wmm_param;
2943
2944 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2945 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2946 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2947 if (err) {
2948 sdata_info(sdata,
2949 "failed to move station %pM to desired state\n",
2950 sta->sta.addr);
2951 WARN_ON(__sta_info_destroy(sta));
2952 mutex_unlock(&sdata->local->sta_mtx);
2953 ret = false;
2954 goto out;
2955 }
2956
2957 mutex_unlock(&sdata->local->sta_mtx);
2958
2959 /*
2960 * Always handle WMM once after association regardless
2961 * of the first value the AP uses. Setting -1 here has
2962 * that effect because the AP values is an unsigned
2963 * 4-bit value.
2964 */
2965 ifmgd->wmm_last_param_set = -1;
2966
2967 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
2968 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2969 elems.wmm_param_len);
2970 else
2971 ieee80211_set_wmm_default(sdata, false);
2972 changed |= BSS_CHANGED_QOS;
2973
2974 /* set AID and assoc capability,
2975 * ieee80211_set_associated() will tell the driver */
2976 bss_conf->aid = aid;
2977 bss_conf->assoc_capability = capab_info;
2978 ieee80211_set_associated(sdata, cbss, changed);
2979
2980 /*
2981 * If we're using 4-addr mode, let the AP know that we're
2982 * doing so, so that it can create the STA VLAN on its side
2983 */
2984 if (ifmgd->use_4addr)
2985 ieee80211_send_4addr_nullfunc(local, sdata);
2986
2987 /*
2988 * Start timer to probe the connection to the AP now.
2989 * Also start the timer that will detect beacon loss.
2990 */
2991 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2992 ieee80211_sta_reset_beacon_monitor(sdata);
2993
2994 ret = true;
2995 out:
2996 kfree(bss_ies);
2997 return ret;
2998 }
2999
3000 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3001 struct ieee80211_mgmt *mgmt,
3002 size_t len)
3003 {
3004 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3005 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3006 u16 capab_info, status_code, aid;
3007 struct ieee802_11_elems elems;
3008 int ac, uapsd_queues = -1;
3009 u8 *pos;
3010 bool reassoc;
3011 struct cfg80211_bss *bss;
3012
3013 sdata_assert_lock(sdata);
3014
3015 if (!assoc_data)
3016 return;
3017 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3018 return;
3019
3020 /*
3021 * AssocResp and ReassocResp have identical structure, so process both
3022 * of them in this function.
3023 */
3024
3025 if (len < 24 + 6)
3026 return;
3027
3028 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3029 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3030 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3031 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3032
3033 sdata_info(sdata,
3034 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3035 reassoc ? "Rea" : "A", mgmt->sa,
3036 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3037
3038 pos = mgmt->u.assoc_resp.variable;
3039 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3040
3041 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3042 elems.timeout_int &&
3043 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3044 u32 tu, ms;
3045 tu = le32_to_cpu(elems.timeout_int->value);
3046 ms = tu * 1024 / 1000;
3047 sdata_info(sdata,
3048 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3049 mgmt->sa, tu, ms);
3050 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3051 assoc_data->timeout_started = true;
3052 if (ms > IEEE80211_ASSOC_TIMEOUT)
3053 run_again(sdata, assoc_data->timeout);
3054 return;
3055 }
3056
3057 bss = assoc_data->bss;
3058
3059 if (status_code != WLAN_STATUS_SUCCESS) {
3060 sdata_info(sdata, "%pM denied association (code=%d)\n",
3061 mgmt->sa, status_code);
3062 ieee80211_destroy_assoc_data(sdata, false);
3063 } else {
3064 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3065 /* oops -- internal error -- send timeout for now */
3066 ieee80211_destroy_assoc_data(sdata, false);
3067 cfg80211_assoc_timeout(sdata->dev, bss);
3068 return;
3069 }
3070 sdata_info(sdata, "associated\n");
3071
3072 /*
3073 * destroy assoc_data afterwards, as otherwise an idle
3074 * recalc after assoc_data is NULL but before associated
3075 * is set can cause the interface to go idle
3076 */
3077 ieee80211_destroy_assoc_data(sdata, true);
3078
3079 /* get uapsd queues configuration */
3080 uapsd_queues = 0;
3081 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3082 if (sdata->tx_conf[ac].uapsd)
3083 uapsd_queues |= BIT(ac);
3084 }
3085
3086 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3087 }
3088
3089 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3090 struct ieee80211_mgmt *mgmt, size_t len,
3091 struct ieee80211_rx_status *rx_status,
3092 struct ieee802_11_elems *elems)
3093 {
3094 struct ieee80211_local *local = sdata->local;
3095 struct ieee80211_bss *bss;
3096 struct ieee80211_channel *channel;
3097
3098 sdata_assert_lock(sdata);
3099
3100 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3101 if (!channel)
3102 return;
3103
3104 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3105 channel);
3106 if (bss) {
3107 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3108 ieee80211_rx_bss_put(local, bss);
3109 }
3110 }
3111
3112
3113 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3114 struct sk_buff *skb)
3115 {
3116 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3117 struct ieee80211_if_managed *ifmgd;
3118 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3119 size_t baselen, len = skb->len;
3120 struct ieee802_11_elems elems;
3121
3122 ifmgd = &sdata->u.mgd;
3123
3124 sdata_assert_lock(sdata);
3125
3126 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3127 return; /* ignore ProbeResp to foreign address */
3128
3129 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3130 if (baselen > len)
3131 return;
3132
3133 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3134 false, &elems);
3135
3136 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3137
3138 if (ifmgd->associated &&
3139 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3140 ieee80211_reset_ap_probe(sdata);
3141
3142 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
3143 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
3144 /* got probe response, continue with auth */
3145 sdata_info(sdata, "direct probe responded\n");
3146 ifmgd->auth_data->tries = 0;
3147 ifmgd->auth_data->timeout = jiffies;
3148 ifmgd->auth_data->timeout_started = true;
3149 run_again(sdata, ifmgd->auth_data->timeout);
3150 }
3151 }
3152
3153 /*
3154 * This is the canonical list of information elements we care about,
3155 * the filter code also gives us all changes to the Microsoft OUI
3156 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3157 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3158 * changes to requested client power.
3159 *
3160 * We implement beacon filtering in software since that means we can
3161 * avoid processing the frame here and in cfg80211, and userspace
3162 * will not be able to tell whether the hardware supports it or not.
3163 *
3164 * XXX: This list needs to be dynamic -- userspace needs to be able to
3165 * add items it requires. It also needs to be able to tell us to
3166 * look out for other vendor IEs.
3167 */
3168 static const u64 care_about_ies =
3169 (1ULL << WLAN_EID_COUNTRY) |
3170 (1ULL << WLAN_EID_ERP_INFO) |
3171 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3172 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3173 (1ULL << WLAN_EID_HT_CAPABILITY) |
3174 (1ULL << WLAN_EID_HT_OPERATION);
3175
3176 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3177 struct ieee80211_mgmt *mgmt, size_t len,
3178 struct ieee80211_rx_status *rx_status)
3179 {
3180 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3181 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3182 size_t baselen;
3183 struct ieee802_11_elems elems;
3184 struct ieee80211_local *local = sdata->local;
3185 struct ieee80211_chanctx_conf *chanctx_conf;
3186 struct ieee80211_channel *chan;
3187 struct sta_info *sta;
3188 u32 changed = 0;
3189 bool erp_valid;
3190 u8 erp_value = 0;
3191 u32 ncrc;
3192 u8 *bssid;
3193 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3194
3195 sdata_assert_lock(sdata);
3196
3197 /* Process beacon from the current BSS */
3198 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3199 if (baselen > len)
3200 return;
3201
3202 rcu_read_lock();
3203 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3204 if (!chanctx_conf) {
3205 rcu_read_unlock();
3206 return;
3207 }
3208
3209 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3210 rcu_read_unlock();
3211 return;
3212 }
3213 chan = chanctx_conf->def.chan;
3214 rcu_read_unlock();
3215
3216 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3217 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3218 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3219 len - baselen, false, &elems);
3220
3221 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3222 if (elems.tim && !elems.parse_error) {
3223 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3224 ifmgd->dtim_period = tim_ie->dtim_period;
3225 }
3226 ifmgd->have_beacon = true;
3227 ifmgd->assoc_data->need_beacon = false;
3228 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3229 sdata->vif.bss_conf.sync_tsf =
3230 le64_to_cpu(mgmt->u.beacon.timestamp);
3231 sdata->vif.bss_conf.sync_device_ts =
3232 rx_status->device_timestamp;
3233 if (elems.tim)
3234 sdata->vif.bss_conf.sync_dtim_count =
3235 elems.tim->dtim_count;
3236 else
3237 sdata->vif.bss_conf.sync_dtim_count = 0;
3238 }
3239 /* continue assoc process */
3240 ifmgd->assoc_data->timeout = jiffies;
3241 ifmgd->assoc_data->timeout_started = true;
3242 run_again(sdata, ifmgd->assoc_data->timeout);
3243 return;
3244 }
3245
3246 if (!ifmgd->associated ||
3247 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3248 return;
3249 bssid = ifmgd->associated->bssid;
3250
3251 /* Track average RSSI from the Beacon frames of the current AP */
3252 ifmgd->last_beacon_signal = rx_status->signal;
3253 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3254 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3255 ifmgd->ave_beacon_signal = rx_status->signal * 16;
3256 ifmgd->last_cqm_event_signal = 0;
3257 ifmgd->count_beacon_signal = 1;
3258 ifmgd->last_ave_beacon_signal = 0;
3259 } else {
3260 ifmgd->ave_beacon_signal =
3261 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3262 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3263 ifmgd->ave_beacon_signal) / 16;
3264 ifmgd->count_beacon_signal++;
3265 }
3266
3267 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3268 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3269 int sig = ifmgd->ave_beacon_signal;
3270 int last_sig = ifmgd->last_ave_beacon_signal;
3271
3272 /*
3273 * if signal crosses either of the boundaries, invoke callback
3274 * with appropriate parameters
3275 */
3276 if (sig > ifmgd->rssi_max_thold &&
3277 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3278 ifmgd->last_ave_beacon_signal = sig;
3279 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3280 } else if (sig < ifmgd->rssi_min_thold &&
3281 (last_sig >= ifmgd->rssi_max_thold ||
3282 last_sig == 0)) {
3283 ifmgd->last_ave_beacon_signal = sig;
3284 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3285 }
3286 }
3287
3288 if (bss_conf->cqm_rssi_thold &&
3289 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3290 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3291 int sig = ifmgd->ave_beacon_signal / 16;
3292 int last_event = ifmgd->last_cqm_event_signal;
3293 int thold = bss_conf->cqm_rssi_thold;
3294 int hyst = bss_conf->cqm_rssi_hyst;
3295 if (sig < thold &&
3296 (last_event == 0 || sig < last_event - hyst)) {
3297 ifmgd->last_cqm_event_signal = sig;
3298 ieee80211_cqm_rssi_notify(
3299 &sdata->vif,
3300 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3301 GFP_KERNEL);
3302 } else if (sig > thold &&
3303 (last_event == 0 || sig > last_event + hyst)) {
3304 ifmgd->last_cqm_event_signal = sig;
3305 ieee80211_cqm_rssi_notify(
3306 &sdata->vif,
3307 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3308 GFP_KERNEL);
3309 }
3310 }
3311
3312 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3313 mlme_dbg_ratelimited(sdata,
3314 "cancelling AP probe due to a received beacon\n");
3315 ieee80211_reset_ap_probe(sdata);
3316 }
3317
3318 /*
3319 * Push the beacon loss detection into the future since
3320 * we are processing a beacon from the AP just now.
3321 */
3322 ieee80211_sta_reset_beacon_monitor(sdata);
3323
3324 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3325 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3326 len - baselen, false, &elems,
3327 care_about_ies, ncrc);
3328
3329 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3330 bool directed_tim = ieee80211_check_tim(elems.tim,
3331 elems.tim_len,
3332 ifmgd->aid);
3333 if (directed_tim) {
3334 if (local->hw.conf.dynamic_ps_timeout > 0) {
3335 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3336 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3337 ieee80211_hw_config(local,
3338 IEEE80211_CONF_CHANGE_PS);
3339 }
3340 ieee80211_send_nullfunc(local, sdata, 0);
3341 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3342 local->pspolling = true;
3343
3344 /*
3345 * Here is assumed that the driver will be
3346 * able to send ps-poll frame and receive a
3347 * response even though power save mode is
3348 * enabled, but some drivers might require
3349 * to disable power save here. This needs
3350 * to be investigated.
3351 */
3352 ieee80211_send_pspoll(local, sdata);
3353 }
3354 }
3355 }
3356
3357 if (sdata->vif.p2p) {
3358 struct ieee80211_p2p_noa_attr noa = {};
3359 int ret;
3360
3361 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3362 len - baselen,
3363 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3364 (u8 *) &noa, sizeof(noa));
3365 if (ret >= 2) {
3366 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3367 /* valid noa_attr and index changed */
3368 sdata->u.mgd.p2p_noa_index = noa.index;
3369 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3370 changed |= BSS_CHANGED_P2P_PS;
3371 /*
3372 * make sure we update all information, the CRC
3373 * mechanism doesn't look at P2P attributes.
3374 */
3375 ifmgd->beacon_crc_valid = false;
3376 }
3377 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3378 /* noa_attr not found and we had valid noa_attr before */
3379 sdata->u.mgd.p2p_noa_index = -1;
3380 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3381 changed |= BSS_CHANGED_P2P_PS;
3382 ifmgd->beacon_crc_valid = false;
3383 }
3384 }
3385
3386 if (ifmgd->csa_waiting_bcn)
3387 ieee80211_chswitch_post_beacon(sdata);
3388
3389 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3390 return;
3391 ifmgd->beacon_crc = ncrc;
3392 ifmgd->beacon_crc_valid = true;
3393
3394 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3395
3396 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3397 rx_status->device_timestamp,
3398 &elems, true);
3399
3400 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3401 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3402 elems.wmm_param_len))
3403 changed |= BSS_CHANGED_QOS;
3404
3405 /*
3406 * If we haven't had a beacon before, tell the driver about the
3407 * DTIM period (and beacon timing if desired) now.
3408 */
3409 if (!ifmgd->have_beacon) {
3410 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3411 if (elems.tim)
3412 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3413 else
3414 bss_conf->dtim_period = 1;
3415
3416 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3417 sdata->vif.bss_conf.sync_tsf =
3418 le64_to_cpu(mgmt->u.beacon.timestamp);
3419 sdata->vif.bss_conf.sync_device_ts =
3420 rx_status->device_timestamp;
3421 if (elems.tim)
3422 sdata->vif.bss_conf.sync_dtim_count =
3423 elems.tim->dtim_count;
3424 else
3425 sdata->vif.bss_conf.sync_dtim_count = 0;
3426 }
3427
3428 changed |= BSS_CHANGED_BEACON_INFO;
3429 ifmgd->have_beacon = true;
3430
3431 mutex_lock(&local->iflist_mtx);
3432 ieee80211_recalc_ps(local, -1);
3433 mutex_unlock(&local->iflist_mtx);
3434
3435 ieee80211_recalc_ps_vif(sdata);
3436 }
3437
3438 if (elems.erp_info) {
3439 erp_valid = true;
3440 erp_value = elems.erp_info[0];
3441 } else {
3442 erp_valid = false;
3443 }
3444 changed |= ieee80211_handle_bss_capability(sdata,
3445 le16_to_cpu(mgmt->u.beacon.capab_info),
3446 erp_valid, erp_value);
3447
3448 mutex_lock(&local->sta_mtx);
3449 sta = sta_info_get(sdata, bssid);
3450
3451 if (ieee80211_config_bw(sdata, sta,
3452 elems.ht_cap_elem, elems.ht_operation,
3453 elems.vht_operation, bssid, &changed)) {
3454 mutex_unlock(&local->sta_mtx);
3455 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3456 WLAN_REASON_DEAUTH_LEAVING,
3457 true, deauth_buf);
3458 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3459 sizeof(deauth_buf));
3460 return;
3461 }
3462
3463 if (sta && elems.opmode_notif)
3464 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3465 rx_status->band, true);
3466 mutex_unlock(&local->sta_mtx);
3467
3468 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3469 elems.country_elem,
3470 elems.country_elem_len,
3471 elems.pwr_constr_elem,
3472 elems.cisco_dtpc_elem);
3473
3474 ieee80211_bss_info_change_notify(sdata, changed);
3475 }
3476
3477 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3478 struct sk_buff *skb)
3479 {
3480 struct ieee80211_rx_status *rx_status;
3481 struct ieee80211_mgmt *mgmt;
3482 u16 fc;
3483 struct ieee802_11_elems elems;
3484 int ies_len;
3485
3486 rx_status = (struct ieee80211_rx_status *) skb->cb;
3487 mgmt = (struct ieee80211_mgmt *) skb->data;
3488 fc = le16_to_cpu(mgmt->frame_control);
3489
3490 sdata_lock(sdata);
3491
3492 switch (fc & IEEE80211_FCTL_STYPE) {
3493 case IEEE80211_STYPE_BEACON:
3494 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3495 break;
3496 case IEEE80211_STYPE_PROBE_RESP:
3497 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3498 break;
3499 case IEEE80211_STYPE_AUTH:
3500 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3501 break;
3502 case IEEE80211_STYPE_DEAUTH:
3503 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3504 break;
3505 case IEEE80211_STYPE_DISASSOC:
3506 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3507 break;
3508 case IEEE80211_STYPE_ASSOC_RESP:
3509 case IEEE80211_STYPE_REASSOC_RESP:
3510 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3511 break;
3512 case IEEE80211_STYPE_ACTION:
3513 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3514 ies_len = skb->len -
3515 offsetof(struct ieee80211_mgmt,
3516 u.action.u.chan_switch.variable);
3517
3518 if (ies_len < 0)
3519 break;
3520
3521 ieee802_11_parse_elems(
3522 mgmt->u.action.u.chan_switch.variable,
3523 ies_len, true, &elems);
3524
3525 if (elems.parse_error)
3526 break;
3527
3528 ieee80211_sta_process_chanswitch(sdata,
3529 rx_status->mactime,
3530 rx_status->device_timestamp,
3531 &elems, false);
3532 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3533 ies_len = skb->len -
3534 offsetof(struct ieee80211_mgmt,
3535 u.action.u.ext_chan_switch.variable);
3536
3537 if (ies_len < 0)
3538 break;
3539
3540 ieee802_11_parse_elems(
3541 mgmt->u.action.u.ext_chan_switch.variable,
3542 ies_len, true, &elems);
3543
3544 if (elems.parse_error)
3545 break;
3546
3547 /* for the handling code pretend this was also an IE */
3548 elems.ext_chansw_ie =
3549 &mgmt->u.action.u.ext_chan_switch.data;
3550
3551 ieee80211_sta_process_chanswitch(sdata,
3552 rx_status->mactime,
3553 rx_status->device_timestamp,
3554 &elems, false);
3555 }
3556 break;
3557 }
3558 sdata_unlock(sdata);
3559 }
3560
3561 static void ieee80211_sta_timer(unsigned long data)
3562 {
3563 struct ieee80211_sub_if_data *sdata =
3564 (struct ieee80211_sub_if_data *) data;
3565
3566 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3567 }
3568
3569 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3570 u8 *bssid, u8 reason, bool tx)
3571 {
3572 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3573
3574 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3575 tx, frame_buf);
3576
3577 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3578 IEEE80211_DEAUTH_FRAME_LEN);
3579 }
3580
3581 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3582 {
3583 struct ieee80211_local *local = sdata->local;
3584 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3585 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3586 u32 tx_flags = 0;
3587
3588 sdata_assert_lock(sdata);
3589
3590 if (WARN_ON_ONCE(!auth_data))
3591 return -EINVAL;
3592
3593 auth_data->tries++;
3594
3595 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3596 sdata_info(sdata, "authentication with %pM timed out\n",
3597 auth_data->bss->bssid);
3598
3599 /*
3600 * Most likely AP is not in the range so remove the
3601 * bss struct for that AP.
3602 */
3603 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3604
3605 return -ETIMEDOUT;
3606 }
3607
3608 drv_mgd_prepare_tx(local, sdata);
3609
3610 if (auth_data->bss->proberesp_ies) {
3611 u16 trans = 1;
3612 u16 status = 0;
3613
3614 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3615 auth_data->bss->bssid, auth_data->tries,
3616 IEEE80211_AUTH_MAX_TRIES);
3617
3618 auth_data->expected_transaction = 2;
3619
3620 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3621 trans = auth_data->sae_trans;
3622 status = auth_data->sae_status;
3623 auth_data->expected_transaction = trans;
3624 }
3625
3626 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3627 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3628 IEEE80211_TX_INTFL_MLME_CONN_TX;
3629
3630 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3631 auth_data->data, auth_data->data_len,
3632 auth_data->bss->bssid,
3633 auth_data->bss->bssid, NULL, 0, 0,
3634 tx_flags);
3635 } else {
3636 const u8 *ssidie;
3637
3638 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3639 auth_data->bss->bssid, auth_data->tries,
3640 IEEE80211_AUTH_MAX_TRIES);
3641
3642 rcu_read_lock();
3643 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3644 if (!ssidie) {
3645 rcu_read_unlock();
3646 return -EINVAL;
3647 }
3648 /*
3649 * Direct probe is sent to broadcast address as some APs
3650 * will not answer to direct packet in unassociated state.
3651 */
3652 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3653 NULL, 0, (u32) -1, true, 0,
3654 auth_data->bss->channel, false);
3655 rcu_read_unlock();
3656 }
3657
3658 if (tx_flags == 0) {
3659 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3660 auth_data->timeout_started = true;
3661 run_again(sdata, auth_data->timeout);
3662 } else {
3663 auth_data->timeout =
3664 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3665 auth_data->timeout_started = true;
3666 run_again(sdata, auth_data->timeout);
3667 }
3668
3669 return 0;
3670 }
3671
3672 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3673 {
3674 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3675 struct ieee80211_local *local = sdata->local;
3676
3677 sdata_assert_lock(sdata);
3678
3679 assoc_data->tries++;
3680 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3681 sdata_info(sdata, "association with %pM timed out\n",
3682 assoc_data->bss->bssid);
3683
3684 /*
3685 * Most likely AP is not in the range so remove the
3686 * bss struct for that AP.
3687 */
3688 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3689
3690 return -ETIMEDOUT;
3691 }
3692
3693 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3694 assoc_data->bss->bssid, assoc_data->tries,
3695 IEEE80211_ASSOC_MAX_TRIES);
3696 ieee80211_send_assoc(sdata);
3697
3698 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3699 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3700 assoc_data->timeout_started = true;
3701 run_again(sdata, assoc_data->timeout);
3702 } else {
3703 assoc_data->timeout =
3704 round_jiffies_up(jiffies +
3705 IEEE80211_ASSOC_TIMEOUT_LONG);
3706 assoc_data->timeout_started = true;
3707 run_again(sdata, assoc_data->timeout);
3708 }
3709
3710 return 0;
3711 }
3712
3713 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3714 __le16 fc, bool acked)
3715 {
3716 struct ieee80211_local *local = sdata->local;
3717
3718 sdata->u.mgd.status_fc = fc;
3719 sdata->u.mgd.status_acked = acked;
3720 sdata->u.mgd.status_received = true;
3721
3722 ieee80211_queue_work(&local->hw, &sdata->work);
3723 }
3724
3725 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3726 {
3727 struct ieee80211_local *local = sdata->local;
3728 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3729
3730 sdata_lock(sdata);
3731
3732 if (ifmgd->status_received) {
3733 __le16 fc = ifmgd->status_fc;
3734 bool status_acked = ifmgd->status_acked;
3735
3736 ifmgd->status_received = false;
3737 if (ifmgd->auth_data &&
3738 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3739 if (status_acked) {
3740 ifmgd->auth_data->timeout =
3741 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3742 run_again(sdata, ifmgd->auth_data->timeout);
3743 } else {
3744 ifmgd->auth_data->timeout = jiffies - 1;
3745 }
3746 ifmgd->auth_data->timeout_started = true;
3747 } else if (ifmgd->assoc_data &&
3748 (ieee80211_is_assoc_req(fc) ||
3749 ieee80211_is_reassoc_req(fc))) {
3750 if (status_acked) {
3751 ifmgd->assoc_data->timeout =
3752 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3753 run_again(sdata, ifmgd->assoc_data->timeout);
3754 } else {
3755 ifmgd->assoc_data->timeout = jiffies - 1;
3756 }
3757 ifmgd->assoc_data->timeout_started = true;
3758 }
3759 }
3760
3761 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3762 time_after(jiffies, ifmgd->auth_data->timeout)) {
3763 if (ifmgd->auth_data->done) {
3764 /*
3765 * ok ... we waited for assoc but userspace didn't,
3766 * so let's just kill the auth data
3767 */
3768 ieee80211_destroy_auth_data(sdata, false);
3769 } else if (ieee80211_probe_auth(sdata)) {
3770 u8 bssid[ETH_ALEN];
3771
3772 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3773
3774 ieee80211_destroy_auth_data(sdata, false);
3775
3776 cfg80211_auth_timeout(sdata->dev, bssid);
3777 }
3778 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3779 run_again(sdata, ifmgd->auth_data->timeout);
3780
3781 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3782 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3783 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3784 ieee80211_do_assoc(sdata)) {
3785 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3786
3787 ieee80211_destroy_assoc_data(sdata, false);
3788 cfg80211_assoc_timeout(sdata->dev, bss);
3789 }
3790 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3791 run_again(sdata, ifmgd->assoc_data->timeout);
3792
3793 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3794 ifmgd->associated) {
3795 u8 bssid[ETH_ALEN];
3796 int max_tries;
3797
3798 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3799
3800 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3801 max_tries = max_nullfunc_tries;
3802 else
3803 max_tries = max_probe_tries;
3804
3805 /* ACK received for nullfunc probing frame */
3806 if (!ifmgd->probe_send_count)
3807 ieee80211_reset_ap_probe(sdata);
3808 else if (ifmgd->nullfunc_failed) {
3809 if (ifmgd->probe_send_count < max_tries) {
3810 mlme_dbg(sdata,
3811 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3812 bssid, ifmgd->probe_send_count,
3813 max_tries);
3814 ieee80211_mgd_probe_ap_send(sdata);
3815 } else {
3816 mlme_dbg(sdata,
3817 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3818 bssid);
3819 ieee80211_sta_connection_lost(sdata, bssid,
3820 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3821 false);
3822 }
3823 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3824 run_again(sdata, ifmgd->probe_timeout);
3825 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3826 mlme_dbg(sdata,
3827 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3828 bssid, probe_wait_ms);
3829 ieee80211_sta_connection_lost(sdata, bssid,
3830 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3831 } else if (ifmgd->probe_send_count < max_tries) {
3832 mlme_dbg(sdata,
3833 "No probe response from AP %pM after %dms, try %d/%i\n",
3834 bssid, probe_wait_ms,
3835 ifmgd->probe_send_count, max_tries);
3836 ieee80211_mgd_probe_ap_send(sdata);
3837 } else {
3838 /*
3839 * We actually lost the connection ... or did we?
3840 * Let's make sure!
3841 */
3842 wiphy_debug(local->hw.wiphy,
3843 "%s: No probe response from AP %pM"
3844 " after %dms, disconnecting.\n",
3845 sdata->name,
3846 bssid, probe_wait_ms);
3847
3848 ieee80211_sta_connection_lost(sdata, bssid,
3849 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3850 }
3851 }
3852
3853 sdata_unlock(sdata);
3854 }
3855
3856 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3857 {
3858 struct ieee80211_sub_if_data *sdata =
3859 (struct ieee80211_sub_if_data *) data;
3860 struct ieee80211_local *local = sdata->local;
3861 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3862
3863 if (local->quiescing)
3864 return;
3865
3866 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3867 return;
3868
3869 sdata->u.mgd.connection_loss = false;
3870 ieee80211_queue_work(&sdata->local->hw,
3871 &sdata->u.mgd.beacon_connection_loss_work);
3872 }
3873
3874 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3875 {
3876 struct ieee80211_sub_if_data *sdata =
3877 (struct ieee80211_sub_if_data *) data;
3878 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3879 struct ieee80211_local *local = sdata->local;
3880
3881 if (local->quiescing)
3882 return;
3883
3884 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3885 return;
3886
3887 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3888 }
3889
3890 static void ieee80211_sta_monitor_work(struct work_struct *work)
3891 {
3892 struct ieee80211_sub_if_data *sdata =
3893 container_of(work, struct ieee80211_sub_if_data,
3894 u.mgd.monitor_work);
3895
3896 ieee80211_mgd_probe_ap(sdata, false);
3897 }
3898
3899 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3900 {
3901 u32 flags;
3902
3903 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3904 __ieee80211_stop_poll(sdata);
3905
3906 /* let's probe the connection once */
3907 flags = sdata->local->hw.flags;
3908 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3909 ieee80211_queue_work(&sdata->local->hw,
3910 &sdata->u.mgd.monitor_work);
3911 /* and do all the other regular work too */
3912 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3913 }
3914 }
3915
3916 #ifdef CONFIG_PM
3917 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3918 {
3919 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3920 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3921
3922 sdata_lock(sdata);
3923
3924 if (ifmgd->auth_data || ifmgd->assoc_data) {
3925 const u8 *bssid = ifmgd->auth_data ?
3926 ifmgd->auth_data->bss->bssid :
3927 ifmgd->assoc_data->bss->bssid;
3928
3929 /*
3930 * If we are trying to authenticate / associate while suspending,
3931 * cfg80211 won't know and won't actually abort those attempts,
3932 * thus we need to do that ourselves.
3933 */
3934 ieee80211_send_deauth_disassoc(sdata, bssid,
3935 IEEE80211_STYPE_DEAUTH,
3936 WLAN_REASON_DEAUTH_LEAVING,
3937 false, frame_buf);
3938 if (ifmgd->assoc_data)
3939 ieee80211_destroy_assoc_data(sdata, false);
3940 if (ifmgd->auth_data)
3941 ieee80211_destroy_auth_data(sdata, false);
3942 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3943 IEEE80211_DEAUTH_FRAME_LEN);
3944 }
3945
3946 sdata_unlock(sdata);
3947 }
3948
3949 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3950 {
3951 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3952
3953 sdata_lock(sdata);
3954 if (!ifmgd->associated) {
3955 sdata_unlock(sdata);
3956 return;
3957 }
3958
3959 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3960 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3961 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3962 ieee80211_sta_connection_lost(sdata,
3963 ifmgd->associated->bssid,
3964 WLAN_REASON_UNSPECIFIED,
3965 true);
3966 sdata_unlock(sdata);
3967 return;
3968 }
3969 sdata_unlock(sdata);
3970 }
3971 #endif
3972
3973 /* interface setup */
3974 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3975 {
3976 struct ieee80211_if_managed *ifmgd;
3977
3978 ifmgd = &sdata->u.mgd;
3979 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3980 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3981 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3982 ieee80211_beacon_connection_loss_work);
3983 INIT_WORK(&ifmgd->csa_connection_drop_work,
3984 ieee80211_csa_connection_drop_work);
3985 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
3986 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
3987 ieee80211_tdls_peer_del_work);
3988 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3989 (unsigned long) sdata);
3990 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3991 (unsigned long) sdata);
3992 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3993 (unsigned long) sdata);
3994 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3995 (unsigned long) sdata);
3996 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
3997 ieee80211_sta_handle_tspec_ac_params_wk);
3998
3999 ifmgd->flags = 0;
4000 ifmgd->powersave = sdata->wdev.ps;
4001 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4002 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4003 ifmgd->p2p_noa_index = -1;
4004
4005 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4006 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4007 else
4008 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4009
4010 /* Setup TDLS data */
4011 spin_lock_init(&ifmgd->teardown_lock);
4012 ifmgd->teardown_skb = NULL;
4013 ifmgd->orig_teardown_skb = NULL;
4014 }
4015
4016 /* scan finished notification */
4017 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4018 {
4019 struct ieee80211_sub_if_data *sdata;
4020
4021 /* Restart STA timers */
4022 rcu_read_lock();
4023 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4024 if (ieee80211_sdata_running(sdata))
4025 ieee80211_restart_sta_timer(sdata);
4026 }
4027 rcu_read_unlock();
4028 }
4029
4030 int ieee80211_max_network_latency(struct notifier_block *nb,
4031 unsigned long data, void *dummy)
4032 {
4033 s32 latency_usec = (s32) data;
4034 struct ieee80211_local *local =
4035 container_of(nb, struct ieee80211_local,
4036 network_latency_notifier);
4037
4038 mutex_lock(&local->iflist_mtx);
4039 ieee80211_recalc_ps(local, latency_usec);
4040 mutex_unlock(&local->iflist_mtx);
4041
4042 return NOTIFY_OK;
4043 }
4044
4045 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4046 struct cfg80211_bss *cbss)
4047 {
4048 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4049 const u8 *ht_cap_ie, *vht_cap_ie;
4050 const struct ieee80211_ht_cap *ht_cap;
4051 const struct ieee80211_vht_cap *vht_cap;
4052 u8 chains = 1;
4053
4054 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4055 return chains;
4056
4057 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4058 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4059 ht_cap = (void *)(ht_cap_ie + 2);
4060 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4061 /*
4062 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4063 * "Tx Unequal Modulation Supported" fields.
4064 */
4065 }
4066
4067 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4068 return chains;
4069
4070 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4071 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4072 u8 nss;
4073 u16 tx_mcs_map;
4074
4075 vht_cap = (void *)(vht_cap_ie + 2);
4076 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4077 for (nss = 8; nss > 0; nss--) {
4078 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4079 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4080 break;
4081 }
4082 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4083 chains = max(chains, nss);
4084 }
4085
4086 return chains;
4087 }
4088
4089 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4090 struct cfg80211_bss *cbss)
4091 {
4092 struct ieee80211_local *local = sdata->local;
4093 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4094 const struct ieee80211_ht_cap *ht_cap = NULL;
4095 const struct ieee80211_ht_operation *ht_oper = NULL;
4096 const struct ieee80211_vht_operation *vht_oper = NULL;
4097 struct ieee80211_supported_band *sband;
4098 struct cfg80211_chan_def chandef;
4099 int ret;
4100
4101 sband = local->hw.wiphy->bands[cbss->channel->band];
4102
4103 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4104 IEEE80211_STA_DISABLE_80P80MHZ |
4105 IEEE80211_STA_DISABLE_160MHZ);
4106
4107 rcu_read_lock();
4108
4109 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4110 sband->ht_cap.ht_supported) {
4111 const u8 *ht_oper_ie, *ht_cap_ie;
4112
4113 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4114 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4115 ht_oper = (void *)(ht_oper_ie + 2);
4116
4117 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4118 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4119 ht_cap = (void *)(ht_cap_ie + 2);
4120
4121 if (!ht_cap) {
4122 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4123 ht_oper = NULL;
4124 }
4125 }
4126
4127 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4128 sband->vht_cap.vht_supported) {
4129 const u8 *vht_oper_ie, *vht_cap;
4130
4131 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4132 WLAN_EID_VHT_OPERATION);
4133 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4134 vht_oper = (void *)(vht_oper_ie + 2);
4135 if (vht_oper && !ht_oper) {
4136 vht_oper = NULL;
4137 sdata_info(sdata,
4138 "AP advertised VHT without HT, disabling both\n");
4139 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4140 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4141 }
4142
4143 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4144 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4145 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4146 vht_oper = NULL;
4147 }
4148 }
4149
4150 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4151 cbss->channel,
4152 ht_cap, ht_oper, vht_oper,
4153 &chandef, false);
4154
4155 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4156 local->rx_chains);
4157
4158 rcu_read_unlock();
4159
4160 /* will change later if needed */
4161 sdata->smps_mode = IEEE80211_SMPS_OFF;
4162
4163 mutex_lock(&local->mtx);
4164 /*
4165 * If this fails (possibly due to channel context sharing
4166 * on incompatible channels, e.g. 80+80 and 160 sharing the
4167 * same control channel) try to use a smaller bandwidth.
4168 */
4169 ret = ieee80211_vif_use_channel(sdata, &chandef,
4170 IEEE80211_CHANCTX_SHARED);
4171
4172 /* don't downgrade for 5 and 10 MHz channels, though. */
4173 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4174 chandef.width == NL80211_CHAN_WIDTH_10)
4175 goto out;
4176
4177 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4178 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4179 ret = ieee80211_vif_use_channel(sdata, &chandef,
4180 IEEE80211_CHANCTX_SHARED);
4181 }
4182 out:
4183 mutex_unlock(&local->mtx);
4184 return ret;
4185 }
4186
4187 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4188 struct cfg80211_bss *cbss, bool assoc)
4189 {
4190 struct ieee80211_local *local = sdata->local;
4191 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4192 struct ieee80211_bss *bss = (void *)cbss->priv;
4193 struct sta_info *new_sta = NULL;
4194 bool have_sta = false;
4195 int err;
4196
4197 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4198 return -EINVAL;
4199
4200 if (assoc) {
4201 rcu_read_lock();
4202 have_sta = sta_info_get(sdata, cbss->bssid);
4203 rcu_read_unlock();
4204 }
4205
4206 if (!have_sta) {
4207 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4208 if (!new_sta)
4209 return -ENOMEM;
4210 }
4211 if (new_sta) {
4212 u32 rates = 0, basic_rates = 0;
4213 bool have_higher_than_11mbit;
4214 int min_rate = INT_MAX, min_rate_index = -1;
4215 struct ieee80211_chanctx_conf *chanctx_conf;
4216 struct ieee80211_supported_band *sband;
4217 const struct cfg80211_bss_ies *ies;
4218 int shift;
4219 u32 rate_flags;
4220
4221 sband = local->hw.wiphy->bands[cbss->channel->band];
4222
4223 err = ieee80211_prep_channel(sdata, cbss);
4224 if (err) {
4225 sta_info_free(local, new_sta);
4226 return -EINVAL;
4227 }
4228 shift = ieee80211_vif_get_shift(&sdata->vif);
4229
4230 rcu_read_lock();
4231 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4232 if (WARN_ON(!chanctx_conf)) {
4233 rcu_read_unlock();
4234 sta_info_free(local, new_sta);
4235 return -EINVAL;
4236 }
4237 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4238 rcu_read_unlock();
4239
4240 ieee80211_get_rates(sband, bss->supp_rates,
4241 bss->supp_rates_len,
4242 &rates, &basic_rates,
4243 &have_higher_than_11mbit,
4244 &min_rate, &min_rate_index,
4245 shift, rate_flags);
4246
4247 /*
4248 * This used to be a workaround for basic rates missing
4249 * in the association response frame. Now that we no
4250 * longer use the basic rates from there, it probably
4251 * doesn't happen any more, but keep the workaround so
4252 * in case some *other* APs are buggy in different ways
4253 * we can connect -- with a warning.
4254 */
4255 if (!basic_rates && min_rate_index >= 0) {
4256 sdata_info(sdata,
4257 "No basic rates, using min rate instead\n");
4258 basic_rates = BIT(min_rate_index);
4259 }
4260
4261 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4262 sdata->vif.bss_conf.basic_rates = basic_rates;
4263
4264 /* cf. IEEE 802.11 9.2.12 */
4265 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4266 have_higher_than_11mbit)
4267 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4268 else
4269 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4270
4271 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4272
4273 /* set timing information */
4274 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4275 rcu_read_lock();
4276 ies = rcu_dereference(cbss->beacon_ies);
4277 if (ies) {
4278 const u8 *tim_ie;
4279
4280 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4281 sdata->vif.bss_conf.sync_device_ts =
4282 bss->device_ts_beacon;
4283 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4284 ies->data, ies->len);
4285 if (tim_ie && tim_ie[1] >= 2)
4286 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4287 else
4288 sdata->vif.bss_conf.sync_dtim_count = 0;
4289 } else if (!(local->hw.flags &
4290 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4291 ies = rcu_dereference(cbss->proberesp_ies);
4292 /* must be non-NULL since beacon IEs were NULL */
4293 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4294 sdata->vif.bss_conf.sync_device_ts =
4295 bss->device_ts_presp;
4296 sdata->vif.bss_conf.sync_dtim_count = 0;
4297 } else {
4298 sdata->vif.bss_conf.sync_tsf = 0;
4299 sdata->vif.bss_conf.sync_device_ts = 0;
4300 sdata->vif.bss_conf.sync_dtim_count = 0;
4301 }
4302 rcu_read_unlock();
4303
4304 /* tell driver about BSSID, basic rates and timing */
4305 ieee80211_bss_info_change_notify(sdata,
4306 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4307 BSS_CHANGED_BEACON_INT);
4308
4309 if (assoc)
4310 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4311
4312 err = sta_info_insert(new_sta);
4313 new_sta = NULL;
4314 if (err) {
4315 sdata_info(sdata,
4316 "failed to insert STA entry for the AP (error %d)\n",
4317 err);
4318 return err;
4319 }
4320 } else
4321 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4322
4323 return 0;
4324 }
4325
4326 /* config hooks */
4327 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4328 struct cfg80211_auth_request *req)
4329 {
4330 struct ieee80211_local *local = sdata->local;
4331 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4332 struct ieee80211_mgd_auth_data *auth_data;
4333 u16 auth_alg;
4334 int err;
4335
4336 /* prepare auth data structure */
4337
4338 switch (req->auth_type) {
4339 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4340 auth_alg = WLAN_AUTH_OPEN;
4341 break;
4342 case NL80211_AUTHTYPE_SHARED_KEY:
4343 if (IS_ERR(local->wep_tx_tfm))
4344 return -EOPNOTSUPP;
4345 auth_alg = WLAN_AUTH_SHARED_KEY;
4346 break;
4347 case NL80211_AUTHTYPE_FT:
4348 auth_alg = WLAN_AUTH_FT;
4349 break;
4350 case NL80211_AUTHTYPE_NETWORK_EAP:
4351 auth_alg = WLAN_AUTH_LEAP;
4352 break;
4353 case NL80211_AUTHTYPE_SAE:
4354 auth_alg = WLAN_AUTH_SAE;
4355 break;
4356 default:
4357 return -EOPNOTSUPP;
4358 }
4359
4360 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4361 req->ie_len, GFP_KERNEL);
4362 if (!auth_data)
4363 return -ENOMEM;
4364
4365 auth_data->bss = req->bss;
4366
4367 if (req->sae_data_len >= 4) {
4368 __le16 *pos = (__le16 *) req->sae_data;
4369 auth_data->sae_trans = le16_to_cpu(pos[0]);
4370 auth_data->sae_status = le16_to_cpu(pos[1]);
4371 memcpy(auth_data->data, req->sae_data + 4,
4372 req->sae_data_len - 4);
4373 auth_data->data_len += req->sae_data_len - 4;
4374 }
4375
4376 if (req->ie && req->ie_len) {
4377 memcpy(&auth_data->data[auth_data->data_len],
4378 req->ie, req->ie_len);
4379 auth_data->data_len += req->ie_len;
4380 }
4381
4382 if (req->key && req->key_len) {
4383 auth_data->key_len = req->key_len;
4384 auth_data->key_idx = req->key_idx;
4385 memcpy(auth_data->key, req->key, req->key_len);
4386 }
4387
4388 auth_data->algorithm = auth_alg;
4389
4390 /* try to authenticate/probe */
4391
4392 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4393 ifmgd->assoc_data) {
4394 err = -EBUSY;
4395 goto err_free;
4396 }
4397
4398 if (ifmgd->auth_data)
4399 ieee80211_destroy_auth_data(sdata, false);
4400
4401 /* prep auth_data so we don't go into idle on disassoc */
4402 ifmgd->auth_data = auth_data;
4403
4404 if (ifmgd->associated) {
4405 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4406
4407 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4408 WLAN_REASON_UNSPECIFIED,
4409 false, frame_buf);
4410
4411 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4412 sizeof(frame_buf));
4413 }
4414
4415 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4416
4417 err = ieee80211_prep_connection(sdata, req->bss, false);
4418 if (err)
4419 goto err_clear;
4420
4421 err = ieee80211_probe_auth(sdata);
4422 if (err) {
4423 sta_info_destroy_addr(sdata, req->bss->bssid);
4424 goto err_clear;
4425 }
4426
4427 /* hold our own reference */
4428 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4429 return 0;
4430
4431 err_clear:
4432 memset(ifmgd->bssid, 0, ETH_ALEN);
4433 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4434 ifmgd->auth_data = NULL;
4435 err_free:
4436 kfree(auth_data);
4437 return err;
4438 }
4439
4440 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4441 const u8 *wmm_param, int len)
4442 {
4443 const u8 *pos;
4444 size_t left;
4445
4446 if (len < 8)
4447 return false;
4448
4449 if (wmm_param[5] != 1 /* version */)
4450 return false;
4451
4452 pos = wmm_param + 8;
4453 left = len - 8;
4454
4455 for (; left >= 4; left -= 4, pos += 4) {
4456 u8 aifsn = pos[0] & 0x0f;
4457 u8 ecwmin = pos[1] & 0x0f;
4458 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4459 int aci = (pos[0] >> 5) & 0x03;
4460
4461 if (aifsn < 2) {
4462 sdata_info(sdata,
4463 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4464 aifsn, aci);
4465 return false;
4466 }
4467 if (ecwmin > ecwmax) {
4468 sdata_info(sdata,
4469 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4470 ecwmin, ecwmax, aci);
4471 return false;
4472 }
4473 }
4474
4475 return true;
4476 }
4477
4478 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4479 struct cfg80211_assoc_request *req)
4480 {
4481 struct ieee80211_local *local = sdata->local;
4482 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4483 struct ieee80211_bss *bss = (void *)req->bss->priv;
4484 struct ieee80211_mgd_assoc_data *assoc_data;
4485 const struct cfg80211_bss_ies *beacon_ies;
4486 struct ieee80211_supported_band *sband;
4487 const u8 *ssidie, *ht_ie, *vht_ie;
4488 int i, err;
4489
4490 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4491 if (!assoc_data)
4492 return -ENOMEM;
4493
4494 rcu_read_lock();
4495 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4496 if (!ssidie) {
4497 rcu_read_unlock();
4498 kfree(assoc_data);
4499 return -EINVAL;
4500 }
4501 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4502 assoc_data->ssid_len = ssidie[1];
4503 rcu_read_unlock();
4504
4505 if (ifmgd->associated) {
4506 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4507
4508 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4509 WLAN_REASON_UNSPECIFIED,
4510 false, frame_buf);
4511
4512 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4513 sizeof(frame_buf));
4514 }
4515
4516 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4517 err = -EBUSY;
4518 goto err_free;
4519 }
4520
4521 if (ifmgd->assoc_data) {
4522 err = -EBUSY;
4523 goto err_free;
4524 }
4525
4526 if (ifmgd->auth_data) {
4527 bool match;
4528
4529 /* keep sta info, bssid if matching */
4530 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4531 ieee80211_destroy_auth_data(sdata, match);
4532 }
4533
4534 /* prepare assoc data */
4535
4536 ifmgd->beacon_crc_valid = false;
4537
4538 assoc_data->wmm = bss->wmm_used &&
4539 (local->hw.queues >= IEEE80211_NUM_ACS);
4540 if (assoc_data->wmm) {
4541 /* try to check validity of WMM params IE */
4542 const struct cfg80211_bss_ies *ies;
4543 const u8 *wp, *start, *end;
4544
4545 rcu_read_lock();
4546 ies = rcu_dereference(req->bss->ies);
4547 start = ies->data;
4548 end = start + ies->len;
4549
4550 while (true) {
4551 wp = cfg80211_find_vendor_ie(
4552 WLAN_OUI_MICROSOFT,
4553 WLAN_OUI_TYPE_MICROSOFT_WMM,
4554 start, end - start);
4555 if (!wp)
4556 break;
4557 start = wp + wp[1] + 2;
4558 /* if this IE is too short, try the next */
4559 if (wp[1] <= 4)
4560 continue;
4561 /* if this IE is WMM params, we found what we wanted */
4562 if (wp[6] == 1)
4563 break;
4564 }
4565
4566 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4567 wp[1] - 2)) {
4568 assoc_data->wmm = false;
4569 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4570 }
4571 rcu_read_unlock();
4572 }
4573
4574 /*
4575 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4576 * We still associate in non-HT mode (11a/b/g) if any one of these
4577 * ciphers is configured as pairwise.
4578 * We can set this to true for non-11n hardware, that'll be checked
4579 * separately along with the peer capabilities.
4580 */
4581 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4582 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4583 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4584 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4585 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4586 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4587 netdev_info(sdata->dev,
4588 "disabling HT/VHT due to WEP/TKIP use\n");
4589 }
4590 }
4591
4592 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4593 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4594 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4595 }
4596
4597 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4598 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4599
4600 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4601 sband = local->hw.wiphy->bands[req->bss->channel->band];
4602 if (!sband->ht_cap.ht_supported ||
4603 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4604 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4605 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4606 if (!bss->wmm_used &&
4607 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4608 netdev_info(sdata->dev,
4609 "disabling HT as WMM/QoS is not supported by the AP\n");
4610 }
4611
4612 /* disable VHT if we don't support it or the AP doesn't use WMM */
4613 if (!sband->vht_cap.vht_supported ||
4614 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4615 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4616 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4617 if (!bss->wmm_used &&
4618 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4619 netdev_info(sdata->dev,
4620 "disabling VHT as WMM/QoS is not supported by the AP\n");
4621 }
4622
4623 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4624 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4625 sizeof(ifmgd->ht_capa_mask));
4626
4627 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4628 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4629 sizeof(ifmgd->vht_capa_mask));
4630
4631 if (req->ie && req->ie_len) {
4632 memcpy(assoc_data->ie, req->ie, req->ie_len);
4633 assoc_data->ie_len = req->ie_len;
4634 }
4635
4636 assoc_data->bss = req->bss;
4637
4638 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4639 if (ifmgd->powersave)
4640 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4641 else
4642 sdata->smps_mode = IEEE80211_SMPS_OFF;
4643 } else
4644 sdata->smps_mode = ifmgd->req_smps;
4645
4646 assoc_data->capability = req->bss->capability;
4647 assoc_data->supp_rates = bss->supp_rates;
4648 assoc_data->supp_rates_len = bss->supp_rates_len;
4649
4650 rcu_read_lock();
4651 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4652 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4653 assoc_data->ap_ht_param =
4654 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4655 else
4656 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4657 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4658 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4659 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4660 sizeof(struct ieee80211_vht_cap));
4661 else
4662 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4663 rcu_read_unlock();
4664
4665 if (bss->wmm_used && bss->uapsd_supported &&
4666 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
4667 assoc_data->uapsd = true;
4668 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4669 } else {
4670 assoc_data->uapsd = false;
4671 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4672 }
4673
4674 if (req->prev_bssid)
4675 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4676
4677 if (req->use_mfp) {
4678 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4679 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4680 } else {
4681 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4682 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4683 }
4684
4685 if (req->flags & ASSOC_REQ_USE_RRM)
4686 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4687 else
4688 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4689
4690 if (req->crypto.control_port)
4691 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4692 else
4693 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4694
4695 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4696 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4697 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4698 sdata->vif.type);
4699
4700 /* kick off associate process */
4701
4702 ifmgd->assoc_data = assoc_data;
4703 ifmgd->dtim_period = 0;
4704 ifmgd->have_beacon = false;
4705
4706 err = ieee80211_prep_connection(sdata, req->bss, true);
4707 if (err)
4708 goto err_clear;
4709
4710 rcu_read_lock();
4711 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4712
4713 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4714 !beacon_ies) {
4715 /*
4716 * Wait up to one beacon interval ...
4717 * should this be more if we miss one?
4718 */
4719 sdata_info(sdata, "waiting for beacon from %pM\n",
4720 ifmgd->bssid);
4721 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4722 assoc_data->timeout_started = true;
4723 assoc_data->need_beacon = true;
4724 } else if (beacon_ies) {
4725 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4726 beacon_ies->data,
4727 beacon_ies->len);
4728 u8 dtim_count = 0;
4729
4730 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4731 const struct ieee80211_tim_ie *tim;
4732 tim = (void *)(tim_ie + 2);
4733 ifmgd->dtim_period = tim->dtim_period;
4734 dtim_count = tim->dtim_count;
4735 }
4736 ifmgd->have_beacon = true;
4737 assoc_data->timeout = jiffies;
4738 assoc_data->timeout_started = true;
4739
4740 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4741 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4742 sdata->vif.bss_conf.sync_device_ts =
4743 bss->device_ts_beacon;
4744 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4745 }
4746 } else {
4747 assoc_data->timeout = jiffies;
4748 assoc_data->timeout_started = true;
4749 }
4750 rcu_read_unlock();
4751
4752 run_again(sdata, assoc_data->timeout);
4753
4754 if (bss->corrupt_data) {
4755 char *corrupt_type = "data";
4756 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4757 if (bss->corrupt_data &
4758 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4759 corrupt_type = "beacon and probe response";
4760 else
4761 corrupt_type = "beacon";
4762 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4763 corrupt_type = "probe response";
4764 sdata_info(sdata, "associating with AP with corrupt %s\n",
4765 corrupt_type);
4766 }
4767
4768 return 0;
4769 err_clear:
4770 memset(ifmgd->bssid, 0, ETH_ALEN);
4771 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4772 ifmgd->assoc_data = NULL;
4773 err_free:
4774 kfree(assoc_data);
4775 return err;
4776 }
4777
4778 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4779 struct cfg80211_deauth_request *req)
4780 {
4781 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4782 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4783 bool tx = !req->local_state_change;
4784
4785 if (ifmgd->auth_data &&
4786 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4787 sdata_info(sdata,
4788 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4789 req->bssid, req->reason_code,
4790 ieee80211_get_reason_code_string(req->reason_code));
4791
4792 drv_mgd_prepare_tx(sdata->local, sdata);
4793 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4794 IEEE80211_STYPE_DEAUTH,
4795 req->reason_code, tx,
4796 frame_buf);
4797 ieee80211_destroy_auth_data(sdata, false);
4798 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4799 IEEE80211_DEAUTH_FRAME_LEN);
4800
4801 return 0;
4802 }
4803
4804 if (ifmgd->associated &&
4805 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4806 sdata_info(sdata,
4807 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4808 req->bssid, req->reason_code,
4809 ieee80211_get_reason_code_string(req->reason_code));
4810
4811 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4812 req->reason_code, tx, frame_buf);
4813 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4814 IEEE80211_DEAUTH_FRAME_LEN);
4815 return 0;
4816 }
4817
4818 return -ENOTCONN;
4819 }
4820
4821 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4822 struct cfg80211_disassoc_request *req)
4823 {
4824 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4825 u8 bssid[ETH_ALEN];
4826 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4827
4828 /*
4829 * cfg80211 should catch this ... but it's racy since
4830 * we can receive a disassoc frame, process it, hand it
4831 * to cfg80211 while that's in a locked section already
4832 * trying to tell us that the user wants to disconnect.
4833 */
4834 if (ifmgd->associated != req->bss)
4835 return -ENOLINK;
4836
4837 sdata_info(sdata,
4838 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4839 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4840
4841 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4842 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4843 req->reason_code, !req->local_state_change,
4844 frame_buf);
4845
4846 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4847 IEEE80211_DEAUTH_FRAME_LEN);
4848
4849 return 0;
4850 }
4851
4852 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4853 {
4854 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4855
4856 /*
4857 * Make sure some work items will not run after this,
4858 * they will not do anything but might not have been
4859 * cancelled when disconnecting.
4860 */
4861 cancel_work_sync(&ifmgd->monitor_work);
4862 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4863 cancel_work_sync(&ifmgd->request_smps_work);
4864 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4865 cancel_work_sync(&ifmgd->chswitch_work);
4866 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
4867
4868 sdata_lock(sdata);
4869 if (ifmgd->assoc_data) {
4870 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4871 ieee80211_destroy_assoc_data(sdata, false);
4872 cfg80211_assoc_timeout(sdata->dev, bss);
4873 }
4874 if (ifmgd->auth_data)
4875 ieee80211_destroy_auth_data(sdata, false);
4876 spin_lock_bh(&ifmgd->teardown_lock);
4877 if (ifmgd->teardown_skb) {
4878 kfree_skb(ifmgd->teardown_skb);
4879 ifmgd->teardown_skb = NULL;
4880 ifmgd->orig_teardown_skb = NULL;
4881 }
4882 spin_unlock_bh(&ifmgd->teardown_lock);
4883 del_timer_sync(&ifmgd->timer);
4884 sdata_unlock(sdata);
4885 }
4886
4887 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4888 enum nl80211_cqm_rssi_threshold_event rssi_event,
4889 gfp_t gfp)
4890 {
4891 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4892
4893 trace_api_cqm_rssi_notify(sdata, rssi_event);
4894
4895 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4896 }
4897 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
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