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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
[deliverable/linux.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 vht_chandef = *chandef;
178 goto out;
179 }
180
181 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
182 channel->band);
183 /* check that channel matches the right operating channel */
184 if (!tracking && channel->center_freq != ht_cfreq) {
185 /*
186 * It's possible that some APs are confused here;
187 * Netgear WNDR3700 sometimes reports 4 higher than
188 * the actual channel in association responses, but
189 * since we look at probe response/beacon data here
190 * it should be OK.
191 */
192 sdata_info(sdata,
193 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
194 channel->center_freq, ht_cfreq,
195 ht_oper->primary_chan, channel->band);
196 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
197 goto out;
198 }
199
200 /* check 40 MHz support, if we have it */
201 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
202 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
203 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
204 chandef->width = NL80211_CHAN_WIDTH_40;
205 chandef->center_freq1 += 10;
206 break;
207 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
208 chandef->width = NL80211_CHAN_WIDTH_40;
209 chandef->center_freq1 -= 10;
210 break;
211 }
212 } else {
213 /* 40 MHz (and 80 MHz) must be supported for VHT */
214 ret = IEEE80211_STA_DISABLE_VHT;
215 /* also mark 40 MHz disabled */
216 ret |= IEEE80211_STA_DISABLE_40MHZ;
217 goto out;
218 }
219
220 if (!vht_oper || !sband->vht_cap.vht_supported) {
221 ret = IEEE80211_STA_DISABLE_VHT;
222 goto out;
223 }
224
225 vht_chandef.chan = channel;
226 vht_chandef.center_freq1 =
227 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
228 channel->band);
229 vht_chandef.center_freq2 = 0;
230
231 switch (vht_oper->chan_width) {
232 case IEEE80211_VHT_CHANWIDTH_USE_HT:
233 vht_chandef.width = chandef->width;
234 vht_chandef.center_freq1 = chandef->center_freq1;
235 break;
236 case IEEE80211_VHT_CHANWIDTH_80MHZ:
237 vht_chandef.width = NL80211_CHAN_WIDTH_80;
238 break;
239 case IEEE80211_VHT_CHANWIDTH_160MHZ:
240 vht_chandef.width = NL80211_CHAN_WIDTH_160;
241 break;
242 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
243 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
244 vht_chandef.center_freq2 =
245 ieee80211_channel_to_frequency(
246 vht_oper->center_freq_seg2_idx,
247 channel->band);
248 break;
249 default:
250 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
251 sdata_info(sdata,
252 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
253 vht_oper->chan_width);
254 ret = IEEE80211_STA_DISABLE_VHT;
255 goto out;
256 }
257
258 if (!cfg80211_chandef_valid(&vht_chandef)) {
259 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
260 sdata_info(sdata,
261 "AP VHT information is invalid, disable VHT\n");
262 ret = IEEE80211_STA_DISABLE_VHT;
263 goto out;
264 }
265
266 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
267 ret = 0;
268 goto out;
269 }
270
271 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
272 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
273 sdata_info(sdata,
274 "AP VHT information doesn't match HT, disable VHT\n");
275 ret = IEEE80211_STA_DISABLE_VHT;
276 goto out;
277 }
278
279 *chandef = vht_chandef;
280
281 ret = 0;
282
283 out:
284 /*
285 * When tracking the current AP, don't do any further checks if the
286 * new chandef is identical to the one we're currently using for the
287 * connection. This keeps us from playing ping-pong with regulatory,
288 * without it the following can happen (for example):
289 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
290 * - AP advertises regdom US
291 * - CRDA loads regdom US with 80 MHz prohibited (old database)
292 * - the code below detects an unsupported channel, downgrades, and
293 * we disconnect from the AP in the caller
294 * - disconnect causes CRDA to reload world regdomain and the game
295 * starts anew.
296 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
297 *
298 * It seems possible that there are still scenarios with CSA or real
299 * bandwidth changes where a this could happen, but those cases are
300 * less common and wouldn't completely prevent using the AP.
301 */
302 if (tracking &&
303 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
304 return ret;
305
306 /* don't print the message below for VHT mismatch if VHT is disabled */
307 if (ret & IEEE80211_STA_DISABLE_VHT)
308 vht_chandef = *chandef;
309
310 /*
311 * Ignore the DISABLED flag when we're already connected and only
312 * tracking the APs beacon for bandwidth changes - otherwise we
313 * might get disconnected here if we connect to an AP, update our
314 * regulatory information based on the AP's country IE and the
315 * information we have is wrong/outdated and disables the channel
316 * that we're actually using for the connection to the AP.
317 */
318 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
319 tracking ? 0 :
320 IEEE80211_CHAN_DISABLED)) {
321 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
322 ret = IEEE80211_STA_DISABLE_HT |
323 IEEE80211_STA_DISABLE_VHT;
324 break;
325 }
326
327 ret |= ieee80211_chandef_downgrade(chandef);
328 }
329
330 if (chandef->width != vht_chandef.width && !tracking)
331 sdata_info(sdata,
332 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
333
334 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
335 return ret;
336 }
337
338 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
339 struct sta_info *sta,
340 const struct ieee80211_ht_cap *ht_cap,
341 const struct ieee80211_ht_operation *ht_oper,
342 const struct ieee80211_vht_operation *vht_oper,
343 const u8 *bssid, u32 *changed)
344 {
345 struct ieee80211_local *local = sdata->local;
346 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
347 struct ieee80211_supported_band *sband;
348 struct ieee80211_channel *chan;
349 struct cfg80211_chan_def chandef;
350 u16 ht_opmode;
351 u32 flags;
352 enum ieee80211_sta_rx_bandwidth new_sta_bw;
353 int ret;
354
355 /* if HT was/is disabled, don't track any bandwidth changes */
356 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
357 return 0;
358
359 /* don't check VHT if we associated as non-VHT station */
360 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
361 vht_oper = NULL;
362
363 if (WARN_ON_ONCE(!sta))
364 return -EINVAL;
365
366 /*
367 * if bss configuration changed store the new one -
368 * this may be applicable even if channel is identical
369 */
370 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
371 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
372 *changed |= BSS_CHANGED_HT;
373 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
374 }
375
376 chan = sdata->vif.bss_conf.chandef.chan;
377 sband = local->hw.wiphy->bands[chan->band];
378
379 /* calculate new channel (type) based on HT/VHT operation IEs */
380 flags = ieee80211_determine_chantype(sdata, sband, chan,
381 ht_cap, ht_oper, vht_oper,
382 &chandef, true);
383
384 /*
385 * Downgrade the new channel if we associated with restricted
386 * capabilities. For example, if we associated as a 20 MHz STA
387 * to a 40 MHz AP (due to regulatory, capabilities or config
388 * reasons) then switching to a 40 MHz channel now won't do us
389 * any good -- we couldn't use it with the AP.
390 */
391 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
392 chandef.width == NL80211_CHAN_WIDTH_80P80)
393 flags |= ieee80211_chandef_downgrade(&chandef);
394 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
395 chandef.width == NL80211_CHAN_WIDTH_160)
396 flags |= ieee80211_chandef_downgrade(&chandef);
397 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
398 chandef.width > NL80211_CHAN_WIDTH_20)
399 flags |= ieee80211_chandef_downgrade(&chandef);
400
401 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
402 return 0;
403
404 sdata_info(sdata,
405 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
406 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
407 chandef.center_freq1, chandef.center_freq2);
408
409 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
410 IEEE80211_STA_DISABLE_VHT |
411 IEEE80211_STA_DISABLE_40MHZ |
412 IEEE80211_STA_DISABLE_80P80MHZ |
413 IEEE80211_STA_DISABLE_160MHZ)) ||
414 !cfg80211_chandef_valid(&chandef)) {
415 sdata_info(sdata,
416 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
417 ifmgd->bssid);
418 return -EINVAL;
419 }
420
421 switch (chandef.width) {
422 case NL80211_CHAN_WIDTH_20_NOHT:
423 case NL80211_CHAN_WIDTH_20:
424 new_sta_bw = IEEE80211_STA_RX_BW_20;
425 break;
426 case NL80211_CHAN_WIDTH_40:
427 new_sta_bw = IEEE80211_STA_RX_BW_40;
428 break;
429 case NL80211_CHAN_WIDTH_80:
430 new_sta_bw = IEEE80211_STA_RX_BW_80;
431 break;
432 case NL80211_CHAN_WIDTH_80P80:
433 case NL80211_CHAN_WIDTH_160:
434 new_sta_bw = IEEE80211_STA_RX_BW_160;
435 break;
436 default:
437 return -EINVAL;
438 }
439
440 if (new_sta_bw > sta->cur_max_bandwidth)
441 new_sta_bw = sta->cur_max_bandwidth;
442
443 if (new_sta_bw < sta->sta.bandwidth) {
444 sta->sta.bandwidth = new_sta_bw;
445 rate_control_rate_update(local, sband, sta,
446 IEEE80211_RC_BW_CHANGED);
447 }
448
449 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
450 if (ret) {
451 sdata_info(sdata,
452 "AP %pM changed bandwidth to incompatible one - disconnect\n",
453 ifmgd->bssid);
454 return ret;
455 }
456
457 if (new_sta_bw > sta->sta.bandwidth) {
458 sta->sta.bandwidth = new_sta_bw;
459 rate_control_rate_update(local, sband, sta,
460 IEEE80211_RC_BW_CHANGED);
461 }
462
463 return 0;
464 }
465
466 /* frame sending functions */
467
468 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
469 struct sk_buff *skb, u8 ap_ht_param,
470 struct ieee80211_supported_band *sband,
471 struct ieee80211_channel *channel,
472 enum ieee80211_smps_mode smps)
473 {
474 u8 *pos;
475 u32 flags = channel->flags;
476 u16 cap;
477 struct ieee80211_sta_ht_cap ht_cap;
478
479 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
480
481 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
482 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
483
484 /* determine capability flags */
485 cap = ht_cap.cap;
486
487 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
488 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
489 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
490 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
491 cap &= ~IEEE80211_HT_CAP_SGI_40;
492 }
493 break;
494 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
495 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
496 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
497 cap &= ~IEEE80211_HT_CAP_SGI_40;
498 }
499 break;
500 }
501
502 /*
503 * If 40 MHz was disabled associate as though we weren't
504 * capable of 40 MHz -- some broken APs will never fall
505 * back to trying to transmit in 20 MHz.
506 */
507 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
508 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
509 cap &= ~IEEE80211_HT_CAP_SGI_40;
510 }
511
512 /* set SM PS mode properly */
513 cap &= ~IEEE80211_HT_CAP_SM_PS;
514 switch (smps) {
515 case IEEE80211_SMPS_AUTOMATIC:
516 case IEEE80211_SMPS_NUM_MODES:
517 WARN_ON(1);
518 case IEEE80211_SMPS_OFF:
519 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
520 IEEE80211_HT_CAP_SM_PS_SHIFT;
521 break;
522 case IEEE80211_SMPS_STATIC:
523 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
524 IEEE80211_HT_CAP_SM_PS_SHIFT;
525 break;
526 case IEEE80211_SMPS_DYNAMIC:
527 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
528 IEEE80211_HT_CAP_SM_PS_SHIFT;
529 break;
530 }
531
532 /* reserve and fill IE */
533 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
534 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
535 }
536
537 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
538 struct sk_buff *skb,
539 struct ieee80211_supported_band *sband,
540 struct ieee80211_vht_cap *ap_vht_cap)
541 {
542 u8 *pos;
543 u32 cap;
544 struct ieee80211_sta_vht_cap vht_cap;
545 u32 mask, ap_bf_sts, our_bf_sts;
546
547 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
548
549 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
550 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
551
552 /* determine capability flags */
553 cap = vht_cap.cap;
554
555 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
556 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
557
558 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
559 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
560 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
561 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
562 }
563
564 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
565 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
566 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
567 }
568
569 /*
570 * Some APs apparently get confused if our capabilities are better
571 * than theirs, so restrict what we advertise in the assoc request.
572 */
573 if (!(ap_vht_cap->vht_cap_info &
574 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
575 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
576
577 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
578
579 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
580 our_bf_sts = cap & mask;
581
582 if (ap_bf_sts < our_bf_sts) {
583 cap &= ~mask;
584 cap |= ap_bf_sts;
585 }
586
587 /* reserve and fill IE */
588 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
589 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
590 }
591
592 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
593 {
594 struct ieee80211_local *local = sdata->local;
595 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
596 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
597 struct sk_buff *skb;
598 struct ieee80211_mgmt *mgmt;
599 u8 *pos, qos_info;
600 size_t offset = 0, noffset;
601 int i, count, rates_len, supp_rates_len, shift;
602 u16 capab;
603 struct ieee80211_supported_band *sband;
604 struct ieee80211_chanctx_conf *chanctx_conf;
605 struct ieee80211_channel *chan;
606 u32 rate_flags, rates = 0;
607
608 sdata_assert_lock(sdata);
609
610 rcu_read_lock();
611 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
612 if (WARN_ON(!chanctx_conf)) {
613 rcu_read_unlock();
614 return;
615 }
616 chan = chanctx_conf->def.chan;
617 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
618 rcu_read_unlock();
619 sband = local->hw.wiphy->bands[chan->band];
620 shift = ieee80211_vif_get_shift(&sdata->vif);
621
622 if (assoc_data->supp_rates_len) {
623 /*
624 * Get all rates supported by the device and the AP as
625 * some APs don't like getting a superset of their rates
626 * in the association request (e.g. D-Link DAP 1353 in
627 * b-only mode)...
628 */
629 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
630 assoc_data->supp_rates,
631 assoc_data->supp_rates_len,
632 &rates);
633 } else {
634 /*
635 * In case AP not provide any supported rates information
636 * before association, we send information element(s) with
637 * all rates that we support.
638 */
639 rates_len = 0;
640 for (i = 0; i < sband->n_bitrates; i++) {
641 if ((rate_flags & sband->bitrates[i].flags)
642 != rate_flags)
643 continue;
644 rates |= BIT(i);
645 rates_len++;
646 }
647 }
648
649 skb = alloc_skb(local->hw.extra_tx_headroom +
650 sizeof(*mgmt) + /* bit too much but doesn't matter */
651 2 + assoc_data->ssid_len + /* SSID */
652 4 + rates_len + /* (extended) rates */
653 4 + /* power capability */
654 2 + 2 * sband->n_channels + /* supported channels */
655 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
656 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
657 assoc_data->ie_len + /* extra IEs */
658 9, /* WMM */
659 GFP_KERNEL);
660 if (!skb)
661 return;
662
663 skb_reserve(skb, local->hw.extra_tx_headroom);
664
665 capab = WLAN_CAPABILITY_ESS;
666
667 if (sband->band == IEEE80211_BAND_2GHZ) {
668 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
669 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
670 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
671 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
672 }
673
674 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
675 capab |= WLAN_CAPABILITY_PRIVACY;
676
677 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
678 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
679 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
680
681 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
682 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
683
684 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
685 memset(mgmt, 0, 24);
686 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
687 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
688 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
689
690 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
691 skb_put(skb, 10);
692 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
693 IEEE80211_STYPE_REASSOC_REQ);
694 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
695 mgmt->u.reassoc_req.listen_interval =
696 cpu_to_le16(local->hw.conf.listen_interval);
697 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
698 ETH_ALEN);
699 } else {
700 skb_put(skb, 4);
701 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
702 IEEE80211_STYPE_ASSOC_REQ);
703 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
704 mgmt->u.assoc_req.listen_interval =
705 cpu_to_le16(local->hw.conf.listen_interval);
706 }
707
708 /* SSID */
709 pos = skb_put(skb, 2 + assoc_data->ssid_len);
710 *pos++ = WLAN_EID_SSID;
711 *pos++ = assoc_data->ssid_len;
712 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
713
714 /* add all rates which were marked to be used above */
715 supp_rates_len = rates_len;
716 if (supp_rates_len > 8)
717 supp_rates_len = 8;
718
719 pos = skb_put(skb, supp_rates_len + 2);
720 *pos++ = WLAN_EID_SUPP_RATES;
721 *pos++ = supp_rates_len;
722
723 count = 0;
724 for (i = 0; i < sband->n_bitrates; i++) {
725 if (BIT(i) & rates) {
726 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
727 5 * (1 << shift));
728 *pos++ = (u8) rate;
729 if (++count == 8)
730 break;
731 }
732 }
733
734 if (rates_len > count) {
735 pos = skb_put(skb, rates_len - count + 2);
736 *pos++ = WLAN_EID_EXT_SUPP_RATES;
737 *pos++ = rates_len - count;
738
739 for (i++; i < sband->n_bitrates; i++) {
740 if (BIT(i) & rates) {
741 int rate;
742 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
743 5 * (1 << shift));
744 *pos++ = (u8) rate;
745 }
746 }
747 }
748
749 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
750 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
751 pos = skb_put(skb, 4);
752 *pos++ = WLAN_EID_PWR_CAPABILITY;
753 *pos++ = 2;
754 *pos++ = 0; /* min tx power */
755 /* max tx power */
756 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
757 }
758
759 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
760 /* TODO: get this in reg domain format */
761 pos = skb_put(skb, 2 * sband->n_channels + 2);
762 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
763 *pos++ = 2 * sband->n_channels;
764 for (i = 0; i < sband->n_channels; i++) {
765 *pos++ = ieee80211_frequency_to_channel(
766 sband->channels[i].center_freq);
767 *pos++ = 1; /* one channel in the subband*/
768 }
769 }
770
771 /* if present, add any custom IEs that go before HT */
772 if (assoc_data->ie_len) {
773 static const u8 before_ht[] = {
774 WLAN_EID_SSID,
775 WLAN_EID_SUPP_RATES,
776 WLAN_EID_EXT_SUPP_RATES,
777 WLAN_EID_PWR_CAPABILITY,
778 WLAN_EID_SUPPORTED_CHANNELS,
779 WLAN_EID_RSN,
780 WLAN_EID_QOS_CAPA,
781 WLAN_EID_RRM_ENABLED_CAPABILITIES,
782 WLAN_EID_MOBILITY_DOMAIN,
783 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
784 WLAN_EID_RIC_DATA, /* reassoc only */
785 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
786 };
787 static const u8 after_ric[] = {
788 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
789 WLAN_EID_HT_CAPABILITY,
790 WLAN_EID_BSS_COEX_2040,
791 WLAN_EID_EXT_CAPABILITY,
792 WLAN_EID_QOS_TRAFFIC_CAPA,
793 WLAN_EID_TIM_BCAST_REQ,
794 WLAN_EID_INTERWORKING,
795 /* 60GHz doesn't happen right now */
796 WLAN_EID_VHT_CAPABILITY,
797 WLAN_EID_OPMODE_NOTIF,
798 };
799
800 noffset = ieee80211_ie_split_ric(assoc_data->ie,
801 assoc_data->ie_len,
802 before_ht,
803 ARRAY_SIZE(before_ht),
804 after_ric,
805 ARRAY_SIZE(after_ric),
806 offset);
807 pos = skb_put(skb, noffset - offset);
808 memcpy(pos, assoc_data->ie + offset, noffset - offset);
809 offset = noffset;
810 }
811
812 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
813 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
814 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
815
816 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
817 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
818 sband, chan, sdata->smps_mode);
819
820 /* if present, add any custom IEs that go before VHT */
821 if (assoc_data->ie_len) {
822 static const u8 before_vht[] = {
823 WLAN_EID_SSID,
824 WLAN_EID_SUPP_RATES,
825 WLAN_EID_EXT_SUPP_RATES,
826 WLAN_EID_PWR_CAPABILITY,
827 WLAN_EID_SUPPORTED_CHANNELS,
828 WLAN_EID_RSN,
829 WLAN_EID_QOS_CAPA,
830 WLAN_EID_RRM_ENABLED_CAPABILITIES,
831 WLAN_EID_MOBILITY_DOMAIN,
832 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
833 WLAN_EID_HT_CAPABILITY,
834 WLAN_EID_BSS_COEX_2040,
835 WLAN_EID_EXT_CAPABILITY,
836 WLAN_EID_QOS_TRAFFIC_CAPA,
837 WLAN_EID_TIM_BCAST_REQ,
838 WLAN_EID_INTERWORKING,
839 };
840
841 /* RIC already taken above, so no need to handle here anymore */
842 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
843 before_vht, ARRAY_SIZE(before_vht),
844 offset);
845 pos = skb_put(skb, noffset - offset);
846 memcpy(pos, assoc_data->ie + offset, noffset - offset);
847 offset = noffset;
848 }
849
850 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
851 ieee80211_add_vht_ie(sdata, skb, sband,
852 &assoc_data->ap_vht_cap);
853
854 /* if present, add any custom non-vendor IEs that go after HT */
855 if (assoc_data->ie_len) {
856 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
857 assoc_data->ie_len,
858 offset);
859 pos = skb_put(skb, noffset - offset);
860 memcpy(pos, assoc_data->ie + offset, noffset - offset);
861 offset = noffset;
862 }
863
864 if (assoc_data->wmm) {
865 if (assoc_data->uapsd) {
866 qos_info = ifmgd->uapsd_queues;
867 qos_info |= (ifmgd->uapsd_max_sp_len <<
868 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
869 } else {
870 qos_info = 0;
871 }
872
873 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
874 }
875
876 /* add any remaining custom (i.e. vendor specific here) IEs */
877 if (assoc_data->ie_len) {
878 noffset = assoc_data->ie_len;
879 pos = skb_put(skb, noffset - offset);
880 memcpy(pos, assoc_data->ie + offset, noffset - offset);
881 }
882
883 drv_mgd_prepare_tx(local, sdata);
884
885 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
886 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
887 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
888 IEEE80211_TX_INTFL_MLME_CONN_TX;
889 ieee80211_tx_skb(sdata, skb);
890 }
891
892 void ieee80211_send_pspoll(struct ieee80211_local *local,
893 struct ieee80211_sub_if_data *sdata)
894 {
895 struct ieee80211_pspoll *pspoll;
896 struct sk_buff *skb;
897
898 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
899 if (!skb)
900 return;
901
902 pspoll = (struct ieee80211_pspoll *) skb->data;
903 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
904
905 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
906 ieee80211_tx_skb(sdata, skb);
907 }
908
909 void ieee80211_send_nullfunc(struct ieee80211_local *local,
910 struct ieee80211_sub_if_data *sdata,
911 int powersave)
912 {
913 struct sk_buff *skb;
914 struct ieee80211_hdr_3addr *nullfunc;
915 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
916
917 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
918 if (!skb)
919 return;
920
921 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
922 if (powersave)
923 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
924
925 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
926 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
927
928 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
929 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
930
931 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
932 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
933
934 ieee80211_tx_skb(sdata, skb);
935 }
936
937 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
938 struct ieee80211_sub_if_data *sdata)
939 {
940 struct sk_buff *skb;
941 struct ieee80211_hdr *nullfunc;
942 __le16 fc;
943
944 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
945 return;
946
947 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
948 if (!skb)
949 return;
950
951 skb_reserve(skb, local->hw.extra_tx_headroom);
952
953 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
954 memset(nullfunc, 0, 30);
955 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
956 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
957 nullfunc->frame_control = fc;
958 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
959 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
960 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
961 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
962
963 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
964 ieee80211_tx_skb(sdata, skb);
965 }
966
967 /* spectrum management related things */
968 static void ieee80211_chswitch_work(struct work_struct *work)
969 {
970 struct ieee80211_sub_if_data *sdata =
971 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
972 struct ieee80211_local *local = sdata->local;
973 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
974 int ret;
975
976 if (!ieee80211_sdata_running(sdata))
977 return;
978
979 sdata_lock(sdata);
980 mutex_lock(&local->mtx);
981 mutex_lock(&local->chanctx_mtx);
982
983 if (!ifmgd->associated)
984 goto out;
985
986 if (!sdata->vif.csa_active)
987 goto out;
988
989 /*
990 * using reservation isn't immediate as it may be deferred until later
991 * with multi-vif. once reservation is complete it will re-schedule the
992 * work with no reserved_chanctx so verify chandef to check if it
993 * completed successfully
994 */
995
996 if (sdata->reserved_chanctx) {
997 /*
998 * with multi-vif csa driver may call ieee80211_csa_finish()
999 * many times while waiting for other interfaces to use their
1000 * reservations
1001 */
1002 if (sdata->reserved_ready)
1003 goto out;
1004
1005 ret = ieee80211_vif_use_reserved_context(sdata);
1006 if (ret) {
1007 sdata_info(sdata,
1008 "failed to use reserved channel context, disconnecting (err=%d)\n",
1009 ret);
1010 ieee80211_queue_work(&sdata->local->hw,
1011 &ifmgd->csa_connection_drop_work);
1012 goto out;
1013 }
1014
1015 goto out;
1016 }
1017
1018 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1019 &sdata->csa_chandef)) {
1020 sdata_info(sdata,
1021 "failed to finalize channel switch, disconnecting\n");
1022 ieee80211_queue_work(&sdata->local->hw,
1023 &ifmgd->csa_connection_drop_work);
1024 goto out;
1025 }
1026
1027 /* XXX: shouldn't really modify cfg80211-owned data! */
1028 ifmgd->associated->channel = sdata->csa_chandef.chan;
1029
1030 ifmgd->csa_waiting_bcn = true;
1031
1032 ieee80211_sta_reset_beacon_monitor(sdata);
1033 ieee80211_sta_reset_conn_monitor(sdata);
1034
1035 out:
1036 mutex_unlock(&local->chanctx_mtx);
1037 mutex_unlock(&local->mtx);
1038 sdata_unlock(sdata);
1039 }
1040
1041 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1042 {
1043 struct ieee80211_local *local = sdata->local;
1044 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1045 int ret;
1046
1047 sdata_assert_lock(sdata);
1048
1049 WARN_ON(!sdata->vif.csa_active);
1050
1051 if (sdata->csa_block_tx) {
1052 ieee80211_wake_vif_queues(local, sdata,
1053 IEEE80211_QUEUE_STOP_REASON_CSA);
1054 sdata->csa_block_tx = false;
1055 }
1056
1057 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1058
1059 sdata->vif.csa_active = false;
1060 ifmgd->csa_waiting_bcn = false;
1061
1062 ret = drv_post_channel_switch(sdata);
1063 if (ret) {
1064 sdata_info(sdata,
1065 "driver post channel switch failed, disconnecting\n");
1066 ieee80211_queue_work(&local->hw,
1067 &ifmgd->csa_connection_drop_work);
1068 return;
1069 }
1070 }
1071
1072 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1073 {
1074 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1075 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1076
1077 trace_api_chswitch_done(sdata, success);
1078 if (!success) {
1079 sdata_info(sdata,
1080 "driver channel switch failed, disconnecting\n");
1081 ieee80211_queue_work(&sdata->local->hw,
1082 &ifmgd->csa_connection_drop_work);
1083 } else {
1084 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1085 }
1086 }
1087 EXPORT_SYMBOL(ieee80211_chswitch_done);
1088
1089 static void ieee80211_chswitch_timer(unsigned long data)
1090 {
1091 struct ieee80211_sub_if_data *sdata =
1092 (struct ieee80211_sub_if_data *) data;
1093
1094 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1095 }
1096
1097 static void
1098 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1099 u64 timestamp, u32 device_timestamp,
1100 struct ieee802_11_elems *elems,
1101 bool beacon)
1102 {
1103 struct ieee80211_local *local = sdata->local;
1104 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1105 struct cfg80211_bss *cbss = ifmgd->associated;
1106 struct ieee80211_chanctx_conf *conf;
1107 struct ieee80211_chanctx *chanctx;
1108 enum ieee80211_band current_band;
1109 struct ieee80211_csa_ie csa_ie;
1110 struct ieee80211_channel_switch ch_switch;
1111 int res;
1112
1113 sdata_assert_lock(sdata);
1114
1115 if (!cbss)
1116 return;
1117
1118 if (local->scanning)
1119 return;
1120
1121 /* disregard subsequent announcements if we are already processing */
1122 if (sdata->vif.csa_active)
1123 return;
1124
1125 current_band = cbss->channel->band;
1126 memset(&csa_ie, 0, sizeof(csa_ie));
1127 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1128 ifmgd->flags,
1129 ifmgd->associated->bssid, &csa_ie);
1130 if (res < 0)
1131 ieee80211_queue_work(&local->hw,
1132 &ifmgd->csa_connection_drop_work);
1133 if (res)
1134 return;
1135
1136 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1137 IEEE80211_CHAN_DISABLED)) {
1138 sdata_info(sdata,
1139 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1140 ifmgd->associated->bssid,
1141 csa_ie.chandef.chan->center_freq,
1142 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1143 csa_ie.chandef.center_freq2);
1144 ieee80211_queue_work(&local->hw,
1145 &ifmgd->csa_connection_drop_work);
1146 return;
1147 }
1148
1149 mutex_lock(&local->mtx);
1150 mutex_lock(&local->chanctx_mtx);
1151 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1152 lockdep_is_held(&local->chanctx_mtx));
1153 if (!conf) {
1154 sdata_info(sdata,
1155 "no channel context assigned to vif?, disconnecting\n");
1156 ieee80211_queue_work(&local->hw,
1157 &ifmgd->csa_connection_drop_work);
1158 mutex_unlock(&local->chanctx_mtx);
1159 mutex_unlock(&local->mtx);
1160 return;
1161 }
1162
1163 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1164
1165 if (local->use_chanctx &&
1166 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1167 sdata_info(sdata,
1168 "driver doesn't support chan-switch with channel contexts\n");
1169 ieee80211_queue_work(&local->hw,
1170 &ifmgd->csa_connection_drop_work);
1171 mutex_unlock(&local->chanctx_mtx);
1172 mutex_unlock(&local->mtx);
1173 return;
1174 }
1175
1176 ch_switch.timestamp = timestamp;
1177 ch_switch.device_timestamp = device_timestamp;
1178 ch_switch.block_tx = csa_ie.mode;
1179 ch_switch.chandef = csa_ie.chandef;
1180 ch_switch.count = csa_ie.count;
1181
1182 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1183 sdata_info(sdata,
1184 "preparing for channel switch failed, disconnecting\n");
1185 ieee80211_queue_work(&local->hw,
1186 &ifmgd->csa_connection_drop_work);
1187 mutex_unlock(&local->chanctx_mtx);
1188 mutex_unlock(&local->mtx);
1189 return;
1190 }
1191
1192 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1193 chanctx->mode, false);
1194 if (res) {
1195 sdata_info(sdata,
1196 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1197 res);
1198 ieee80211_queue_work(&local->hw,
1199 &ifmgd->csa_connection_drop_work);
1200 mutex_unlock(&local->chanctx_mtx);
1201 mutex_unlock(&local->mtx);
1202 return;
1203 }
1204 mutex_unlock(&local->chanctx_mtx);
1205
1206 sdata->vif.csa_active = true;
1207 sdata->csa_chandef = csa_ie.chandef;
1208 sdata->csa_block_tx = csa_ie.mode;
1209
1210 if (sdata->csa_block_tx)
1211 ieee80211_stop_vif_queues(local, sdata,
1212 IEEE80211_QUEUE_STOP_REASON_CSA);
1213 mutex_unlock(&local->mtx);
1214
1215 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1216 csa_ie.count);
1217
1218 if (local->ops->channel_switch) {
1219 /* use driver's channel switch callback */
1220 drv_channel_switch(local, sdata, &ch_switch);
1221 return;
1222 }
1223
1224 /* channel switch handled in software */
1225 if (csa_ie.count <= 1)
1226 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1227 else
1228 mod_timer(&ifmgd->chswitch_timer,
1229 TU_TO_EXP_TIME((csa_ie.count - 1) *
1230 cbss->beacon_interval));
1231 }
1232
1233 static bool
1234 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1235 struct ieee80211_channel *channel,
1236 const u8 *country_ie, u8 country_ie_len,
1237 const u8 *pwr_constr_elem,
1238 int *chan_pwr, int *pwr_reduction)
1239 {
1240 struct ieee80211_country_ie_triplet *triplet;
1241 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1242 int i, chan_increment;
1243 bool have_chan_pwr = false;
1244
1245 /* Invalid IE */
1246 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1247 return false;
1248
1249 triplet = (void *)(country_ie + 3);
1250 country_ie_len -= 3;
1251
1252 switch (channel->band) {
1253 default:
1254 WARN_ON_ONCE(1);
1255 /* fall through */
1256 case IEEE80211_BAND_2GHZ:
1257 case IEEE80211_BAND_60GHZ:
1258 chan_increment = 1;
1259 break;
1260 case IEEE80211_BAND_5GHZ:
1261 chan_increment = 4;
1262 break;
1263 }
1264
1265 /* find channel */
1266 while (country_ie_len >= 3) {
1267 u8 first_channel = triplet->chans.first_channel;
1268
1269 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1270 goto next;
1271
1272 for (i = 0; i < triplet->chans.num_channels; i++) {
1273 if (first_channel + i * chan_increment == chan) {
1274 have_chan_pwr = true;
1275 *chan_pwr = triplet->chans.max_power;
1276 break;
1277 }
1278 }
1279 if (have_chan_pwr)
1280 break;
1281
1282 next:
1283 triplet++;
1284 country_ie_len -= 3;
1285 }
1286
1287 if (have_chan_pwr)
1288 *pwr_reduction = *pwr_constr_elem;
1289 return have_chan_pwr;
1290 }
1291
1292 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1293 struct ieee80211_channel *channel,
1294 const u8 *cisco_dtpc_ie,
1295 int *pwr_level)
1296 {
1297 /* From practical testing, the first data byte of the DTPC element
1298 * seems to contain the requested dBm level, and the CLI on Cisco
1299 * APs clearly state the range is -127 to 127 dBm, which indicates
1300 * a signed byte, although it seemingly never actually goes negative.
1301 * The other byte seems to always be zero.
1302 */
1303 *pwr_level = (__s8)cisco_dtpc_ie[4];
1304 }
1305
1306 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1307 struct ieee80211_channel *channel,
1308 struct ieee80211_mgmt *mgmt,
1309 const u8 *country_ie, u8 country_ie_len,
1310 const u8 *pwr_constr_ie,
1311 const u8 *cisco_dtpc_ie)
1312 {
1313 bool has_80211h_pwr = false, has_cisco_pwr = false;
1314 int chan_pwr = 0, pwr_reduction_80211h = 0;
1315 int pwr_level_cisco, pwr_level_80211h;
1316 int new_ap_level;
1317
1318 if (country_ie && pwr_constr_ie &&
1319 mgmt->u.probe_resp.capab_info &
1320 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT)) {
1321 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1322 sdata, channel, country_ie, country_ie_len,
1323 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1324 pwr_level_80211h =
1325 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1326 }
1327
1328 if (cisco_dtpc_ie) {
1329 ieee80211_find_cisco_dtpc(
1330 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1331 has_cisco_pwr = true;
1332 }
1333
1334 if (!has_80211h_pwr && !has_cisco_pwr)
1335 return 0;
1336
1337 /* If we have both 802.11h and Cisco DTPC, apply both limits
1338 * by picking the smallest of the two power levels advertised.
1339 */
1340 if (has_80211h_pwr &&
1341 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1342 sdata_info(sdata,
1343 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1344 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1345 sdata->u.mgd.bssid);
1346 new_ap_level = pwr_level_80211h;
1347 } else { /* has_cisco_pwr is always true here. */
1348 sdata_info(sdata,
1349 "Limiting TX power to %d dBm as advertised by %pM\n",
1350 pwr_level_cisco, sdata->u.mgd.bssid);
1351 new_ap_level = pwr_level_cisco;
1352 }
1353
1354 if (sdata->ap_power_level == new_ap_level)
1355 return 0;
1356
1357 sdata->ap_power_level = new_ap_level;
1358 if (__ieee80211_recalc_txpower(sdata))
1359 return BSS_CHANGED_TXPOWER;
1360 return 0;
1361 }
1362
1363 /* powersave */
1364 static void ieee80211_enable_ps(struct ieee80211_local *local,
1365 struct ieee80211_sub_if_data *sdata)
1366 {
1367 struct ieee80211_conf *conf = &local->hw.conf;
1368
1369 /*
1370 * If we are scanning right now then the parameters will
1371 * take effect when scan finishes.
1372 */
1373 if (local->scanning)
1374 return;
1375
1376 if (conf->dynamic_ps_timeout > 0 &&
1377 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1378 mod_timer(&local->dynamic_ps_timer, jiffies +
1379 msecs_to_jiffies(conf->dynamic_ps_timeout));
1380 } else {
1381 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1382 ieee80211_send_nullfunc(local, sdata, 1);
1383
1384 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1385 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1386 return;
1387
1388 conf->flags |= IEEE80211_CONF_PS;
1389 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1390 }
1391 }
1392
1393 static void ieee80211_change_ps(struct ieee80211_local *local)
1394 {
1395 struct ieee80211_conf *conf = &local->hw.conf;
1396
1397 if (local->ps_sdata) {
1398 ieee80211_enable_ps(local, local->ps_sdata);
1399 } else if (conf->flags & IEEE80211_CONF_PS) {
1400 conf->flags &= ~IEEE80211_CONF_PS;
1401 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1402 del_timer_sync(&local->dynamic_ps_timer);
1403 cancel_work_sync(&local->dynamic_ps_enable_work);
1404 }
1405 }
1406
1407 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1408 {
1409 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1410 struct sta_info *sta = NULL;
1411 bool authorized = false;
1412
1413 if (!mgd->powersave)
1414 return false;
1415
1416 if (mgd->broken_ap)
1417 return false;
1418
1419 if (!mgd->associated)
1420 return false;
1421
1422 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1423 return false;
1424
1425 if (!mgd->have_beacon)
1426 return false;
1427
1428 rcu_read_lock();
1429 sta = sta_info_get(sdata, mgd->bssid);
1430 if (sta)
1431 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1432 rcu_read_unlock();
1433
1434 return authorized;
1435 }
1436
1437 /* need to hold RTNL or interface lock */
1438 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1439 {
1440 struct ieee80211_sub_if_data *sdata, *found = NULL;
1441 int count = 0;
1442 int timeout;
1443
1444 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1445 local->ps_sdata = NULL;
1446 return;
1447 }
1448
1449 list_for_each_entry(sdata, &local->interfaces, list) {
1450 if (!ieee80211_sdata_running(sdata))
1451 continue;
1452 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1453 /* If an AP vif is found, then disable PS
1454 * by setting the count to zero thereby setting
1455 * ps_sdata to NULL.
1456 */
1457 count = 0;
1458 break;
1459 }
1460 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1461 continue;
1462 found = sdata;
1463 count++;
1464 }
1465
1466 if (count == 1 && ieee80211_powersave_allowed(found)) {
1467 s32 beaconint_us;
1468
1469 if (latency < 0)
1470 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1471
1472 beaconint_us = ieee80211_tu_to_usec(
1473 found->vif.bss_conf.beacon_int);
1474
1475 timeout = local->dynamic_ps_forced_timeout;
1476 if (timeout < 0) {
1477 /*
1478 * Go to full PSM if the user configures a very low
1479 * latency requirement.
1480 * The 2000 second value is there for compatibility
1481 * until the PM_QOS_NETWORK_LATENCY is configured
1482 * with real values.
1483 */
1484 if (latency > (1900 * USEC_PER_MSEC) &&
1485 latency != (2000 * USEC_PER_SEC))
1486 timeout = 0;
1487 else
1488 timeout = 100;
1489 }
1490 local->hw.conf.dynamic_ps_timeout = timeout;
1491
1492 if (beaconint_us > latency) {
1493 local->ps_sdata = NULL;
1494 } else {
1495 int maxslp = 1;
1496 u8 dtimper = found->u.mgd.dtim_period;
1497
1498 /* If the TIM IE is invalid, pretend the value is 1 */
1499 if (!dtimper)
1500 dtimper = 1;
1501 else if (dtimper > 1)
1502 maxslp = min_t(int, dtimper,
1503 latency / beaconint_us);
1504
1505 local->hw.conf.max_sleep_period = maxslp;
1506 local->hw.conf.ps_dtim_period = dtimper;
1507 local->ps_sdata = found;
1508 }
1509 } else {
1510 local->ps_sdata = NULL;
1511 }
1512
1513 ieee80211_change_ps(local);
1514 }
1515
1516 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1517 {
1518 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1519
1520 if (sdata->vif.bss_conf.ps != ps_allowed) {
1521 sdata->vif.bss_conf.ps = ps_allowed;
1522 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1523 }
1524 }
1525
1526 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1527 {
1528 struct ieee80211_local *local =
1529 container_of(work, struct ieee80211_local,
1530 dynamic_ps_disable_work);
1531
1532 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1533 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1534 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1535 }
1536
1537 ieee80211_wake_queues_by_reason(&local->hw,
1538 IEEE80211_MAX_QUEUE_MAP,
1539 IEEE80211_QUEUE_STOP_REASON_PS,
1540 false);
1541 }
1542
1543 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1544 {
1545 struct ieee80211_local *local =
1546 container_of(work, struct ieee80211_local,
1547 dynamic_ps_enable_work);
1548 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1549 struct ieee80211_if_managed *ifmgd;
1550 unsigned long flags;
1551 int q;
1552
1553 /* can only happen when PS was just disabled anyway */
1554 if (!sdata)
1555 return;
1556
1557 ifmgd = &sdata->u.mgd;
1558
1559 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1560 return;
1561
1562 if (local->hw.conf.dynamic_ps_timeout > 0) {
1563 /* don't enter PS if TX frames are pending */
1564 if (drv_tx_frames_pending(local)) {
1565 mod_timer(&local->dynamic_ps_timer, jiffies +
1566 msecs_to_jiffies(
1567 local->hw.conf.dynamic_ps_timeout));
1568 return;
1569 }
1570
1571 /*
1572 * transmission can be stopped by others which leads to
1573 * dynamic_ps_timer expiry. Postpone the ps timer if it
1574 * is not the actual idle state.
1575 */
1576 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1577 for (q = 0; q < local->hw.queues; q++) {
1578 if (local->queue_stop_reasons[q]) {
1579 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1580 flags);
1581 mod_timer(&local->dynamic_ps_timer, jiffies +
1582 msecs_to_jiffies(
1583 local->hw.conf.dynamic_ps_timeout));
1584 return;
1585 }
1586 }
1587 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1588 }
1589
1590 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1591 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1592 if (drv_tx_frames_pending(local)) {
1593 mod_timer(&local->dynamic_ps_timer, jiffies +
1594 msecs_to_jiffies(
1595 local->hw.conf.dynamic_ps_timeout));
1596 } else {
1597 ieee80211_send_nullfunc(local, sdata, 1);
1598 /* Flush to get the tx status of nullfunc frame */
1599 ieee80211_flush_queues(local, sdata);
1600 }
1601 }
1602
1603 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1604 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1605 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1606 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1607 local->hw.conf.flags |= IEEE80211_CONF_PS;
1608 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1609 }
1610 }
1611
1612 void ieee80211_dynamic_ps_timer(unsigned long data)
1613 {
1614 struct ieee80211_local *local = (void *) data;
1615
1616 if (local->quiescing || local->suspended)
1617 return;
1618
1619 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1620 }
1621
1622 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1623 {
1624 struct delayed_work *delayed_work =
1625 container_of(work, struct delayed_work, work);
1626 struct ieee80211_sub_if_data *sdata =
1627 container_of(delayed_work, struct ieee80211_sub_if_data,
1628 dfs_cac_timer_work);
1629 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1630
1631 mutex_lock(&sdata->local->mtx);
1632 if (sdata->wdev.cac_started) {
1633 ieee80211_vif_release_channel(sdata);
1634 cfg80211_cac_event(sdata->dev, &chandef,
1635 NL80211_RADAR_CAC_FINISHED,
1636 GFP_KERNEL);
1637 }
1638 mutex_unlock(&sdata->local->mtx);
1639 }
1640
1641 static bool
1642 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1643 {
1644 struct ieee80211_local *local = sdata->local;
1645 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1646 bool ret;
1647 int ac;
1648
1649 if (local->hw.queues < IEEE80211_NUM_ACS)
1650 return false;
1651
1652 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1653 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1654 int non_acm_ac;
1655 unsigned long now = jiffies;
1656
1657 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1658 tx_tspec->admitted_time &&
1659 time_after(now, tx_tspec->time_slice_start + HZ)) {
1660 tx_tspec->consumed_tx_time = 0;
1661 tx_tspec->time_slice_start = now;
1662
1663 if (tx_tspec->downgraded)
1664 tx_tspec->action =
1665 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1666 }
1667
1668 switch (tx_tspec->action) {
1669 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1670 /* take the original parameters */
1671 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1672 sdata_err(sdata,
1673 "failed to set TX queue parameters for queue %d\n",
1674 ac);
1675 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1676 tx_tspec->downgraded = false;
1677 ret = true;
1678 break;
1679 case TX_TSPEC_ACTION_DOWNGRADE:
1680 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1681 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1682 ret = true;
1683 break;
1684 }
1685 /* downgrade next lower non-ACM AC */
1686 for (non_acm_ac = ac + 1;
1687 non_acm_ac < IEEE80211_NUM_ACS;
1688 non_acm_ac++)
1689 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1690 break;
1691 /* The loop will result in using BK even if it requires
1692 * admission control, such configuration makes no sense
1693 * and we have to transmit somehow - the AC selection
1694 * does the same thing.
1695 */
1696 if (drv_conf_tx(local, sdata, ac,
1697 &sdata->tx_conf[non_acm_ac]))
1698 sdata_err(sdata,
1699 "failed to set TX queue parameters for queue %d\n",
1700 ac);
1701 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1702 ret = true;
1703 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1704 tx_tspec->time_slice_start + HZ - now + 1);
1705 break;
1706 case TX_TSPEC_ACTION_NONE:
1707 /* nothing now */
1708 break;
1709 }
1710 }
1711
1712 return ret;
1713 }
1714
1715 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1716 {
1717 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1718 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1719 }
1720
1721 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1722 {
1723 struct ieee80211_sub_if_data *sdata;
1724
1725 sdata = container_of(work, struct ieee80211_sub_if_data,
1726 u.mgd.tx_tspec_wk.work);
1727 ieee80211_sta_handle_tspec_ac_params(sdata);
1728 }
1729
1730 /* MLME */
1731 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1732 struct ieee80211_sub_if_data *sdata,
1733 const u8 *wmm_param, size_t wmm_param_len)
1734 {
1735 struct ieee80211_tx_queue_params params;
1736 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1737 size_t left;
1738 int count;
1739 const u8 *pos;
1740 u8 uapsd_queues = 0;
1741
1742 if (!local->ops->conf_tx)
1743 return false;
1744
1745 if (local->hw.queues < IEEE80211_NUM_ACS)
1746 return false;
1747
1748 if (!wmm_param)
1749 return false;
1750
1751 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1752 return false;
1753
1754 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1755 uapsd_queues = ifmgd->uapsd_queues;
1756
1757 count = wmm_param[6] & 0x0f;
1758 if (count == ifmgd->wmm_last_param_set)
1759 return false;
1760 ifmgd->wmm_last_param_set = count;
1761
1762 pos = wmm_param + 8;
1763 left = wmm_param_len - 8;
1764
1765 memset(&params, 0, sizeof(params));
1766
1767 sdata->wmm_acm = 0;
1768 for (; left >= 4; left -= 4, pos += 4) {
1769 int aci = (pos[0] >> 5) & 0x03;
1770 int acm = (pos[0] >> 4) & 0x01;
1771 bool uapsd = false;
1772 int queue;
1773
1774 switch (aci) {
1775 case 1: /* AC_BK */
1776 queue = 3;
1777 if (acm)
1778 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1779 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1780 uapsd = true;
1781 break;
1782 case 2: /* AC_VI */
1783 queue = 1;
1784 if (acm)
1785 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1786 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1787 uapsd = true;
1788 break;
1789 case 3: /* AC_VO */
1790 queue = 0;
1791 if (acm)
1792 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1793 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1794 uapsd = true;
1795 break;
1796 case 0: /* AC_BE */
1797 default:
1798 queue = 2;
1799 if (acm)
1800 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1801 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1802 uapsd = true;
1803 break;
1804 }
1805
1806 params.aifs = pos[0] & 0x0f;
1807 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1808 params.cw_min = ecw2cw(pos[1] & 0x0f);
1809 params.txop = get_unaligned_le16(pos + 2);
1810 params.acm = acm;
1811 params.uapsd = uapsd;
1812
1813 mlme_dbg(sdata,
1814 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1815 queue, aci, acm,
1816 params.aifs, params.cw_min, params.cw_max,
1817 params.txop, params.uapsd,
1818 ifmgd->tx_tspec[queue].downgraded);
1819 sdata->tx_conf[queue] = params;
1820 if (!ifmgd->tx_tspec[queue].downgraded &&
1821 drv_conf_tx(local, sdata, queue, &params))
1822 sdata_err(sdata,
1823 "failed to set TX queue parameters for queue %d\n",
1824 queue);
1825 }
1826
1827 /* enable WMM or activate new settings */
1828 sdata->vif.bss_conf.qos = true;
1829 return true;
1830 }
1831
1832 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1833 {
1834 lockdep_assert_held(&sdata->local->mtx);
1835
1836 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1837 ieee80211_run_deferred_scan(sdata->local);
1838 }
1839
1840 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1841 {
1842 mutex_lock(&sdata->local->mtx);
1843 __ieee80211_stop_poll(sdata);
1844 mutex_unlock(&sdata->local->mtx);
1845 }
1846
1847 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1848 u16 capab, bool erp_valid, u8 erp)
1849 {
1850 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1851 u32 changed = 0;
1852 bool use_protection;
1853 bool use_short_preamble;
1854 bool use_short_slot;
1855
1856 if (erp_valid) {
1857 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1858 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1859 } else {
1860 use_protection = false;
1861 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1862 }
1863
1864 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1865 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1866 use_short_slot = true;
1867
1868 if (use_protection != bss_conf->use_cts_prot) {
1869 bss_conf->use_cts_prot = use_protection;
1870 changed |= BSS_CHANGED_ERP_CTS_PROT;
1871 }
1872
1873 if (use_short_preamble != bss_conf->use_short_preamble) {
1874 bss_conf->use_short_preamble = use_short_preamble;
1875 changed |= BSS_CHANGED_ERP_PREAMBLE;
1876 }
1877
1878 if (use_short_slot != bss_conf->use_short_slot) {
1879 bss_conf->use_short_slot = use_short_slot;
1880 changed |= BSS_CHANGED_ERP_SLOT;
1881 }
1882
1883 return changed;
1884 }
1885
1886 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1887 struct cfg80211_bss *cbss,
1888 u32 bss_info_changed)
1889 {
1890 struct ieee80211_bss *bss = (void *)cbss->priv;
1891 struct ieee80211_local *local = sdata->local;
1892 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1893
1894 bss_info_changed |= BSS_CHANGED_ASSOC;
1895 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1896 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1897
1898 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1899 beacon_loss_count * bss_conf->beacon_int));
1900
1901 sdata->u.mgd.associated = cbss;
1902 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1903
1904 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1905
1906 if (sdata->vif.p2p) {
1907 const struct cfg80211_bss_ies *ies;
1908
1909 rcu_read_lock();
1910 ies = rcu_dereference(cbss->ies);
1911 if (ies) {
1912 int ret;
1913
1914 ret = cfg80211_get_p2p_attr(
1915 ies->data, ies->len,
1916 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1917 (u8 *) &bss_conf->p2p_noa_attr,
1918 sizeof(bss_conf->p2p_noa_attr));
1919 if (ret >= 2) {
1920 sdata->u.mgd.p2p_noa_index =
1921 bss_conf->p2p_noa_attr.index;
1922 bss_info_changed |= BSS_CHANGED_P2P_PS;
1923 }
1924 }
1925 rcu_read_unlock();
1926 }
1927
1928 /* just to be sure */
1929 ieee80211_stop_poll(sdata);
1930
1931 ieee80211_led_assoc(local, 1);
1932
1933 if (sdata->u.mgd.have_beacon) {
1934 /*
1935 * If the AP is buggy we may get here with no DTIM period
1936 * known, so assume it's 1 which is the only safe assumption
1937 * in that case, although if the TIM IE is broken powersave
1938 * probably just won't work at all.
1939 */
1940 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1941 bss_conf->beacon_rate = bss->beacon_rate;
1942 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1943 } else {
1944 bss_conf->beacon_rate = NULL;
1945 bss_conf->dtim_period = 0;
1946 }
1947
1948 bss_conf->assoc = 1;
1949
1950 /* Tell the driver to monitor connection quality (if supported) */
1951 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1952 bss_conf->cqm_rssi_thold)
1953 bss_info_changed |= BSS_CHANGED_CQM;
1954
1955 /* Enable ARP filtering */
1956 if (bss_conf->arp_addr_cnt)
1957 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1958
1959 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1960
1961 mutex_lock(&local->iflist_mtx);
1962 ieee80211_recalc_ps(local, -1);
1963 mutex_unlock(&local->iflist_mtx);
1964
1965 ieee80211_recalc_smps(sdata);
1966 ieee80211_recalc_ps_vif(sdata);
1967
1968 netif_carrier_on(sdata->dev);
1969 }
1970
1971 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1972 u16 stype, u16 reason, bool tx,
1973 u8 *frame_buf)
1974 {
1975 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1976 struct ieee80211_local *local = sdata->local;
1977 u32 changed = 0;
1978
1979 sdata_assert_lock(sdata);
1980
1981 if (WARN_ON_ONCE(tx && !frame_buf))
1982 return;
1983
1984 if (WARN_ON(!ifmgd->associated))
1985 return;
1986
1987 ieee80211_stop_poll(sdata);
1988
1989 ifmgd->associated = NULL;
1990 netif_carrier_off(sdata->dev);
1991
1992 /*
1993 * if we want to get out of ps before disassoc (why?) we have
1994 * to do it before sending disassoc, as otherwise the null-packet
1995 * won't be valid.
1996 */
1997 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1998 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1999 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2000 }
2001 local->ps_sdata = NULL;
2002
2003 /* disable per-vif ps */
2004 ieee80211_recalc_ps_vif(sdata);
2005
2006 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
2007 if (tx)
2008 ieee80211_flush_queues(local, sdata);
2009
2010 /* deauthenticate/disassociate now */
2011 if (tx || frame_buf)
2012 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2013 reason, tx, frame_buf);
2014
2015 /* flush out frame */
2016 if (tx)
2017 ieee80211_flush_queues(local, sdata);
2018
2019 /* clear bssid only after building the needed mgmt frames */
2020 memset(ifmgd->bssid, 0, ETH_ALEN);
2021
2022 /* remove AP and TDLS peers */
2023 sta_info_flush(sdata);
2024
2025 /* finally reset all BSS / config parameters */
2026 changed |= ieee80211_reset_erp_info(sdata);
2027
2028 ieee80211_led_assoc(local, 0);
2029 changed |= BSS_CHANGED_ASSOC;
2030 sdata->vif.bss_conf.assoc = false;
2031
2032 ifmgd->p2p_noa_index = -1;
2033 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2034 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2035
2036 /* on the next assoc, re-program HT/VHT parameters */
2037 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2038 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2039 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2040 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2041
2042 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2043
2044 del_timer_sync(&local->dynamic_ps_timer);
2045 cancel_work_sync(&local->dynamic_ps_enable_work);
2046
2047 /* Disable ARP filtering */
2048 if (sdata->vif.bss_conf.arp_addr_cnt)
2049 changed |= BSS_CHANGED_ARP_FILTER;
2050
2051 sdata->vif.bss_conf.qos = false;
2052 changed |= BSS_CHANGED_QOS;
2053
2054 /* The BSSID (not really interesting) and HT changed */
2055 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2056 ieee80211_bss_info_change_notify(sdata, changed);
2057
2058 /* disassociated - set to defaults now */
2059 ieee80211_set_wmm_default(sdata, false);
2060
2061 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2062 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2063 del_timer_sync(&sdata->u.mgd.timer);
2064 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2065
2066 sdata->vif.bss_conf.dtim_period = 0;
2067 sdata->vif.bss_conf.beacon_rate = NULL;
2068
2069 ifmgd->have_beacon = false;
2070
2071 ifmgd->flags = 0;
2072 mutex_lock(&local->mtx);
2073 ieee80211_vif_release_channel(sdata);
2074
2075 sdata->vif.csa_active = false;
2076 ifmgd->csa_waiting_bcn = false;
2077 if (sdata->csa_block_tx) {
2078 ieee80211_wake_vif_queues(local, sdata,
2079 IEEE80211_QUEUE_STOP_REASON_CSA);
2080 sdata->csa_block_tx = false;
2081 }
2082 mutex_unlock(&local->mtx);
2083
2084 /* existing TX TSPEC sessions no longer exist */
2085 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2086 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2087
2088 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2089 }
2090
2091 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2092 struct ieee80211_hdr *hdr)
2093 {
2094 /*
2095 * We can postpone the mgd.timer whenever receiving unicast frames
2096 * from AP because we know that the connection is working both ways
2097 * at that time. But multicast frames (and hence also beacons) must
2098 * be ignored here, because we need to trigger the timer during
2099 * data idle periods for sending the periodic probe request to the
2100 * AP we're connected to.
2101 */
2102 if (is_multicast_ether_addr(hdr->addr1))
2103 return;
2104
2105 ieee80211_sta_reset_conn_monitor(sdata);
2106 }
2107
2108 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2109 {
2110 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2111 struct ieee80211_local *local = sdata->local;
2112
2113 mutex_lock(&local->mtx);
2114 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2115 goto out;
2116
2117 __ieee80211_stop_poll(sdata);
2118
2119 mutex_lock(&local->iflist_mtx);
2120 ieee80211_recalc_ps(local, -1);
2121 mutex_unlock(&local->iflist_mtx);
2122
2123 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
2124 goto out;
2125
2126 /*
2127 * We've received a probe response, but are not sure whether
2128 * we have or will be receiving any beacons or data, so let's
2129 * schedule the timers again, just in case.
2130 */
2131 ieee80211_sta_reset_beacon_monitor(sdata);
2132
2133 mod_timer(&ifmgd->conn_mon_timer,
2134 round_jiffies_up(jiffies +
2135 IEEE80211_CONNECTION_IDLE_TIME));
2136 out:
2137 mutex_unlock(&local->mtx);
2138 }
2139
2140 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2141 struct ieee80211_hdr *hdr,
2142 u16 tx_time)
2143 {
2144 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2145 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2146 int ac = ieee80211_ac_from_tid(tid);
2147 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2148 unsigned long now = jiffies;
2149
2150 if (likely(!tx_tspec->admitted_time))
2151 return;
2152
2153 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2154 tx_tspec->consumed_tx_time = 0;
2155 tx_tspec->time_slice_start = now;
2156
2157 if (tx_tspec->downgraded) {
2158 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2159 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2160 }
2161 }
2162
2163 if (tx_tspec->downgraded)
2164 return;
2165
2166 tx_tspec->consumed_tx_time += tx_time;
2167
2168 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2169 tx_tspec->downgraded = true;
2170 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2171 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2172 }
2173 }
2174
2175 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2176 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2177 {
2178 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2179
2180 if (!ieee80211_is_data(hdr->frame_control))
2181 return;
2182
2183 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2184 sdata->u.mgd.probe_send_count > 0) {
2185 if (ack)
2186 ieee80211_sta_reset_conn_monitor(sdata);
2187 else
2188 sdata->u.mgd.nullfunc_failed = true;
2189 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2190 return;
2191 }
2192
2193 if (ack)
2194 ieee80211_sta_reset_conn_monitor(sdata);
2195 }
2196
2197 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2198 {
2199 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2200 const u8 *ssid;
2201 u8 *dst = ifmgd->associated->bssid;
2202 u8 unicast_limit = max(1, max_probe_tries - 3);
2203
2204 /*
2205 * Try sending broadcast probe requests for the last three
2206 * probe requests after the first ones failed since some
2207 * buggy APs only support broadcast probe requests.
2208 */
2209 if (ifmgd->probe_send_count >= unicast_limit)
2210 dst = NULL;
2211
2212 /*
2213 * When the hardware reports an accurate Tx ACK status, it's
2214 * better to send a nullfunc frame instead of a probe request,
2215 * as it will kick us off the AP quickly if we aren't associated
2216 * anymore. The timeout will be reset if the frame is ACKed by
2217 * the AP.
2218 */
2219 ifmgd->probe_send_count++;
2220
2221 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2222 ifmgd->nullfunc_failed = false;
2223 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2224 } else {
2225 int ssid_len;
2226
2227 rcu_read_lock();
2228 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2229 if (WARN_ON_ONCE(ssid == NULL))
2230 ssid_len = 0;
2231 else
2232 ssid_len = ssid[1];
2233
2234 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
2235 ssid + 2, ssid_len, NULL,
2236 0, (u32) -1, true, 0,
2237 ifmgd->associated->channel, false);
2238 rcu_read_unlock();
2239 }
2240
2241 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2242 run_again(sdata, ifmgd->probe_timeout);
2243 }
2244
2245 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2246 bool beacon)
2247 {
2248 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2249 bool already = false;
2250
2251 if (!ieee80211_sdata_running(sdata))
2252 return;
2253
2254 sdata_lock(sdata);
2255
2256 if (!ifmgd->associated)
2257 goto out;
2258
2259 mutex_lock(&sdata->local->mtx);
2260
2261 if (sdata->local->tmp_channel || sdata->local->scanning) {
2262 mutex_unlock(&sdata->local->mtx);
2263 goto out;
2264 }
2265
2266 if (beacon) {
2267 mlme_dbg_ratelimited(sdata,
2268 "detected beacon loss from AP (missed %d beacons) - probing\n",
2269 beacon_loss_count);
2270
2271 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2272 }
2273
2274 /*
2275 * The driver/our work has already reported this event or the
2276 * connection monitoring has kicked in and we have already sent
2277 * a probe request. Or maybe the AP died and the driver keeps
2278 * reporting until we disassociate...
2279 *
2280 * In either case we have to ignore the current call to this
2281 * function (except for setting the correct probe reason bit)
2282 * because otherwise we would reset the timer every time and
2283 * never check whether we received a probe response!
2284 */
2285 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2286 already = true;
2287
2288 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2289
2290 mutex_unlock(&sdata->local->mtx);
2291
2292 if (already)
2293 goto out;
2294
2295 mutex_lock(&sdata->local->iflist_mtx);
2296 ieee80211_recalc_ps(sdata->local, -1);
2297 mutex_unlock(&sdata->local->iflist_mtx);
2298
2299 ifmgd->probe_send_count = 0;
2300 ieee80211_mgd_probe_ap_send(sdata);
2301 out:
2302 sdata_unlock(sdata);
2303 }
2304
2305 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2306 struct ieee80211_vif *vif)
2307 {
2308 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2309 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2310 struct cfg80211_bss *cbss;
2311 struct sk_buff *skb;
2312 const u8 *ssid;
2313 int ssid_len;
2314
2315 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2316 return NULL;
2317
2318 sdata_assert_lock(sdata);
2319
2320 if (ifmgd->associated)
2321 cbss = ifmgd->associated;
2322 else if (ifmgd->auth_data)
2323 cbss = ifmgd->auth_data->bss;
2324 else if (ifmgd->assoc_data)
2325 cbss = ifmgd->assoc_data->bss;
2326 else
2327 return NULL;
2328
2329 rcu_read_lock();
2330 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2331 if (WARN_ON_ONCE(ssid == NULL))
2332 ssid_len = 0;
2333 else
2334 ssid_len = ssid[1];
2335
2336 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2337 (u32) -1, cbss->channel,
2338 ssid + 2, ssid_len,
2339 NULL, 0, true);
2340 rcu_read_unlock();
2341
2342 return skb;
2343 }
2344 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2345
2346 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2347 {
2348 struct ieee80211_local *local = sdata->local;
2349 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2350 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2351
2352 sdata_lock(sdata);
2353 if (!ifmgd->associated) {
2354 sdata_unlock(sdata);
2355 return;
2356 }
2357
2358 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2359 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2360 true, frame_buf);
2361 mutex_lock(&local->mtx);
2362 sdata->vif.csa_active = false;
2363 ifmgd->csa_waiting_bcn = false;
2364 if (sdata->csa_block_tx) {
2365 ieee80211_wake_vif_queues(local, sdata,
2366 IEEE80211_QUEUE_STOP_REASON_CSA);
2367 sdata->csa_block_tx = false;
2368 }
2369 mutex_unlock(&local->mtx);
2370
2371 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2372 IEEE80211_DEAUTH_FRAME_LEN);
2373 sdata_unlock(sdata);
2374 }
2375
2376 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2377 {
2378 struct ieee80211_sub_if_data *sdata =
2379 container_of(work, struct ieee80211_sub_if_data,
2380 u.mgd.beacon_connection_loss_work);
2381 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2382 struct sta_info *sta;
2383
2384 if (ifmgd->associated) {
2385 rcu_read_lock();
2386 sta = sta_info_get(sdata, ifmgd->bssid);
2387 if (sta)
2388 sta->beacon_loss_count++;
2389 rcu_read_unlock();
2390 }
2391
2392 if (ifmgd->connection_loss) {
2393 sdata_info(sdata, "Connection to AP %pM lost\n",
2394 ifmgd->bssid);
2395 __ieee80211_disconnect(sdata);
2396 } else {
2397 ieee80211_mgd_probe_ap(sdata, true);
2398 }
2399 }
2400
2401 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2402 {
2403 struct ieee80211_sub_if_data *sdata =
2404 container_of(work, struct ieee80211_sub_if_data,
2405 u.mgd.csa_connection_drop_work);
2406
2407 __ieee80211_disconnect(sdata);
2408 }
2409
2410 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2411 {
2412 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2413 struct ieee80211_hw *hw = &sdata->local->hw;
2414
2415 trace_api_beacon_loss(sdata);
2416
2417 sdata->u.mgd.connection_loss = false;
2418 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2419 }
2420 EXPORT_SYMBOL(ieee80211_beacon_loss);
2421
2422 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2423 {
2424 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2425 struct ieee80211_hw *hw = &sdata->local->hw;
2426
2427 trace_api_connection_loss(sdata);
2428
2429 sdata->u.mgd.connection_loss = true;
2430 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2431 }
2432 EXPORT_SYMBOL(ieee80211_connection_loss);
2433
2434
2435 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2436 bool assoc)
2437 {
2438 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2439
2440 sdata_assert_lock(sdata);
2441
2442 if (!assoc) {
2443 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2444
2445 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2446 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2447 sdata->u.mgd.flags = 0;
2448 mutex_lock(&sdata->local->mtx);
2449 ieee80211_vif_release_channel(sdata);
2450 mutex_unlock(&sdata->local->mtx);
2451 }
2452
2453 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2454 kfree(auth_data);
2455 sdata->u.mgd.auth_data = NULL;
2456 }
2457
2458 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2459 struct ieee80211_mgmt *mgmt, size_t len)
2460 {
2461 struct ieee80211_local *local = sdata->local;
2462 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2463 u8 *pos;
2464 struct ieee802_11_elems elems;
2465 u32 tx_flags = 0;
2466
2467 pos = mgmt->u.auth.variable;
2468 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2469 if (!elems.challenge)
2470 return;
2471 auth_data->expected_transaction = 4;
2472 drv_mgd_prepare_tx(sdata->local, sdata);
2473 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2474 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2475 IEEE80211_TX_INTFL_MLME_CONN_TX;
2476 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2477 elems.challenge - 2, elems.challenge_len + 2,
2478 auth_data->bss->bssid, auth_data->bss->bssid,
2479 auth_data->key, auth_data->key_len,
2480 auth_data->key_idx, tx_flags);
2481 }
2482
2483 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2484 struct ieee80211_mgmt *mgmt, size_t len)
2485 {
2486 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2487 u8 bssid[ETH_ALEN];
2488 u16 auth_alg, auth_transaction, status_code;
2489 struct sta_info *sta;
2490
2491 sdata_assert_lock(sdata);
2492
2493 if (len < 24 + 6)
2494 return;
2495
2496 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2497 return;
2498
2499 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2500
2501 if (!ether_addr_equal(bssid, mgmt->bssid))
2502 return;
2503
2504 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2505 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2506 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2507
2508 if (auth_alg != ifmgd->auth_data->algorithm ||
2509 auth_transaction != ifmgd->auth_data->expected_transaction) {
2510 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2511 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2512 auth_transaction,
2513 ifmgd->auth_data->expected_transaction);
2514 return;
2515 }
2516
2517 if (status_code != WLAN_STATUS_SUCCESS) {
2518 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2519 mgmt->sa, status_code);
2520 ieee80211_destroy_auth_data(sdata, false);
2521 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2522 return;
2523 }
2524
2525 switch (ifmgd->auth_data->algorithm) {
2526 case WLAN_AUTH_OPEN:
2527 case WLAN_AUTH_LEAP:
2528 case WLAN_AUTH_FT:
2529 case WLAN_AUTH_SAE:
2530 break;
2531 case WLAN_AUTH_SHARED_KEY:
2532 if (ifmgd->auth_data->expected_transaction != 4) {
2533 ieee80211_auth_challenge(sdata, mgmt, len);
2534 /* need another frame */
2535 return;
2536 }
2537 break;
2538 default:
2539 WARN_ONCE(1, "invalid auth alg %d",
2540 ifmgd->auth_data->algorithm);
2541 return;
2542 }
2543
2544 sdata_info(sdata, "authenticated\n");
2545 ifmgd->auth_data->done = true;
2546 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2547 ifmgd->auth_data->timeout_started = true;
2548 run_again(sdata, ifmgd->auth_data->timeout);
2549
2550 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2551 ifmgd->auth_data->expected_transaction != 2) {
2552 /*
2553 * Report auth frame to user space for processing since another
2554 * round of Authentication frames is still needed.
2555 */
2556 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2557 return;
2558 }
2559
2560 /* move station state to auth */
2561 mutex_lock(&sdata->local->sta_mtx);
2562 sta = sta_info_get(sdata, bssid);
2563 if (!sta) {
2564 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2565 goto out_err;
2566 }
2567 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2568 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2569 goto out_err;
2570 }
2571 mutex_unlock(&sdata->local->sta_mtx);
2572
2573 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2574 return;
2575 out_err:
2576 mutex_unlock(&sdata->local->sta_mtx);
2577 /* ignore frame -- wait for timeout */
2578 }
2579
2580 #define case_WLAN(type) \
2581 case WLAN_REASON_##type: return #type
2582
2583 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2584 {
2585 switch (reason_code) {
2586 case_WLAN(UNSPECIFIED);
2587 case_WLAN(PREV_AUTH_NOT_VALID);
2588 case_WLAN(DEAUTH_LEAVING);
2589 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2590 case_WLAN(DISASSOC_AP_BUSY);
2591 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2592 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2593 case_WLAN(DISASSOC_STA_HAS_LEFT);
2594 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2595 case_WLAN(DISASSOC_BAD_POWER);
2596 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2597 case_WLAN(INVALID_IE);
2598 case_WLAN(MIC_FAILURE);
2599 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2600 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2601 case_WLAN(IE_DIFFERENT);
2602 case_WLAN(INVALID_GROUP_CIPHER);
2603 case_WLAN(INVALID_PAIRWISE_CIPHER);
2604 case_WLAN(INVALID_AKMP);
2605 case_WLAN(UNSUPP_RSN_VERSION);
2606 case_WLAN(INVALID_RSN_IE_CAP);
2607 case_WLAN(IEEE8021X_FAILED);
2608 case_WLAN(CIPHER_SUITE_REJECTED);
2609 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2610 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2611 case_WLAN(DISASSOC_LOW_ACK);
2612 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2613 case_WLAN(QSTA_LEAVE_QBSS);
2614 case_WLAN(QSTA_NOT_USE);
2615 case_WLAN(QSTA_REQUIRE_SETUP);
2616 case_WLAN(QSTA_TIMEOUT);
2617 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2618 case_WLAN(MESH_PEER_CANCELED);
2619 case_WLAN(MESH_MAX_PEERS);
2620 case_WLAN(MESH_CONFIG);
2621 case_WLAN(MESH_CLOSE);
2622 case_WLAN(MESH_MAX_RETRIES);
2623 case_WLAN(MESH_CONFIRM_TIMEOUT);
2624 case_WLAN(MESH_INVALID_GTK);
2625 case_WLAN(MESH_INCONSISTENT_PARAM);
2626 case_WLAN(MESH_INVALID_SECURITY);
2627 case_WLAN(MESH_PATH_ERROR);
2628 case_WLAN(MESH_PATH_NOFORWARD);
2629 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2630 case_WLAN(MAC_EXISTS_IN_MBSS);
2631 case_WLAN(MESH_CHAN_REGULATORY);
2632 case_WLAN(MESH_CHAN);
2633 default: return "<unknown>";
2634 }
2635 }
2636
2637 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2638 struct ieee80211_mgmt *mgmt, size_t len)
2639 {
2640 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2641 const u8 *bssid = NULL;
2642 u16 reason_code;
2643
2644 sdata_assert_lock(sdata);
2645
2646 if (len < 24 + 2)
2647 return;
2648
2649 if (!ifmgd->associated ||
2650 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2651 return;
2652
2653 bssid = ifmgd->associated->bssid;
2654
2655 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2656
2657 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2658 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
2659
2660 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2661
2662 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2663 }
2664
2665
2666 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2667 struct ieee80211_mgmt *mgmt, size_t len)
2668 {
2669 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2670 u16 reason_code;
2671
2672 sdata_assert_lock(sdata);
2673
2674 if (len < 24 + 2)
2675 return;
2676
2677 if (!ifmgd->associated ||
2678 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2679 return;
2680
2681 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2682
2683 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2684 mgmt->sa, reason_code);
2685
2686 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2687
2688 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2689 }
2690
2691 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2692 u8 *supp_rates, unsigned int supp_rates_len,
2693 u32 *rates, u32 *basic_rates,
2694 bool *have_higher_than_11mbit,
2695 int *min_rate, int *min_rate_index,
2696 int shift, u32 rate_flags)
2697 {
2698 int i, j;
2699
2700 for (i = 0; i < supp_rates_len; i++) {
2701 int rate = supp_rates[i] & 0x7f;
2702 bool is_basic = !!(supp_rates[i] & 0x80);
2703
2704 if ((rate * 5 * (1 << shift)) > 110)
2705 *have_higher_than_11mbit = true;
2706
2707 /*
2708 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2709 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2710 *
2711 * Note: Even through the membership selector and the basic
2712 * rate flag share the same bit, they are not exactly
2713 * the same.
2714 */
2715 if (!!(supp_rates[i] & 0x80) &&
2716 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2717 continue;
2718
2719 for (j = 0; j < sband->n_bitrates; j++) {
2720 struct ieee80211_rate *br;
2721 int brate;
2722
2723 br = &sband->bitrates[j];
2724 if ((rate_flags & br->flags) != rate_flags)
2725 continue;
2726
2727 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2728 if (brate == rate) {
2729 *rates |= BIT(j);
2730 if (is_basic)
2731 *basic_rates |= BIT(j);
2732 if ((rate * 5) < *min_rate) {
2733 *min_rate = rate * 5;
2734 *min_rate_index = j;
2735 }
2736 break;
2737 }
2738 }
2739 }
2740 }
2741
2742 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2743 bool assoc)
2744 {
2745 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2746
2747 sdata_assert_lock(sdata);
2748
2749 if (!assoc) {
2750 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2751
2752 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2753 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2754 sdata->u.mgd.flags = 0;
2755 mutex_lock(&sdata->local->mtx);
2756 ieee80211_vif_release_channel(sdata);
2757 mutex_unlock(&sdata->local->mtx);
2758 }
2759
2760 kfree(assoc_data);
2761 sdata->u.mgd.assoc_data = NULL;
2762 }
2763
2764 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2765 struct cfg80211_bss *cbss,
2766 struct ieee80211_mgmt *mgmt, size_t len)
2767 {
2768 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2769 struct ieee80211_local *local = sdata->local;
2770 struct ieee80211_supported_band *sband;
2771 struct sta_info *sta;
2772 u8 *pos;
2773 u16 capab_info, aid;
2774 struct ieee802_11_elems elems;
2775 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2776 const struct cfg80211_bss_ies *bss_ies = NULL;
2777 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2778 u32 changed = 0;
2779 int err;
2780 bool ret;
2781
2782 /* AssocResp and ReassocResp have identical structure */
2783
2784 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2785 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2786
2787 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2788 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2789 aid);
2790 aid &= ~(BIT(15) | BIT(14));
2791
2792 ifmgd->broken_ap = false;
2793
2794 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2795 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2796 aid);
2797 aid = 0;
2798 ifmgd->broken_ap = true;
2799 }
2800
2801 pos = mgmt->u.assoc_resp.variable;
2802 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2803
2804 if (!elems.supp_rates) {
2805 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2806 return false;
2807 }
2808
2809 ifmgd->aid = aid;
2810 ifmgd->tdls_chan_switch_prohibited =
2811 elems.ext_capab && elems.ext_capab_len >= 5 &&
2812 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2813
2814 /*
2815 * Some APs are erroneously not including some information in their
2816 * (re)association response frames. Try to recover by using the data
2817 * from the beacon or probe response. This seems to afflict mobile
2818 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2819 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2820 */
2821 if ((assoc_data->wmm && !elems.wmm_param) ||
2822 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2823 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2824 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2825 (!elems.vht_cap_elem || !elems.vht_operation))) {
2826 const struct cfg80211_bss_ies *ies;
2827 struct ieee802_11_elems bss_elems;
2828
2829 rcu_read_lock();
2830 ies = rcu_dereference(cbss->ies);
2831 if (ies)
2832 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2833 GFP_ATOMIC);
2834 rcu_read_unlock();
2835 if (!bss_ies)
2836 return false;
2837
2838 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2839 false, &bss_elems);
2840 if (assoc_data->wmm &&
2841 !elems.wmm_param && bss_elems.wmm_param) {
2842 elems.wmm_param = bss_elems.wmm_param;
2843 sdata_info(sdata,
2844 "AP bug: WMM param missing from AssocResp\n");
2845 }
2846
2847 /*
2848 * Also check if we requested HT/VHT, otherwise the AP doesn't
2849 * have to include the IEs in the (re)association response.
2850 */
2851 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2852 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2853 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2854 sdata_info(sdata,
2855 "AP bug: HT capability missing from AssocResp\n");
2856 }
2857 if (!elems.ht_operation && bss_elems.ht_operation &&
2858 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2859 elems.ht_operation = bss_elems.ht_operation;
2860 sdata_info(sdata,
2861 "AP bug: HT operation missing from AssocResp\n");
2862 }
2863 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2864 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2865 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2866 sdata_info(sdata,
2867 "AP bug: VHT capa missing from AssocResp\n");
2868 }
2869 if (!elems.vht_operation && bss_elems.vht_operation &&
2870 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2871 elems.vht_operation = bss_elems.vht_operation;
2872 sdata_info(sdata,
2873 "AP bug: VHT operation missing from AssocResp\n");
2874 }
2875 }
2876
2877 /*
2878 * We previously checked these in the beacon/probe response, so
2879 * they should be present here. This is just a safety net.
2880 */
2881 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2882 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2883 sdata_info(sdata,
2884 "HT AP is missing WMM params or HT capability/operation\n");
2885 ret = false;
2886 goto out;
2887 }
2888
2889 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2890 (!elems.vht_cap_elem || !elems.vht_operation)) {
2891 sdata_info(sdata,
2892 "VHT AP is missing VHT capability/operation\n");
2893 ret = false;
2894 goto out;
2895 }
2896
2897 mutex_lock(&sdata->local->sta_mtx);
2898 /*
2899 * station info was already allocated and inserted before
2900 * the association and should be available to us
2901 */
2902 sta = sta_info_get(sdata, cbss->bssid);
2903 if (WARN_ON(!sta)) {
2904 mutex_unlock(&sdata->local->sta_mtx);
2905 ret = false;
2906 goto out;
2907 }
2908
2909 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2910
2911 /* Set up internal HT/VHT capabilities */
2912 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2913 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2914 elems.ht_cap_elem, sta);
2915
2916 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2917 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2918 elems.vht_cap_elem, sta);
2919
2920 /*
2921 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2922 * in their association response, so ignore that data for our own
2923 * configuration. If it changed since the last beacon, we'll get the
2924 * next beacon and update then.
2925 */
2926
2927 /*
2928 * If an operating mode notification IE is present, override the
2929 * NSS calculation (that would be done in rate_control_rate_init())
2930 * and use the # of streams from that element.
2931 */
2932 if (elems.opmode_notif &&
2933 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2934 u8 nss;
2935
2936 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2937 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2938 nss += 1;
2939 sta->sta.rx_nss = nss;
2940 }
2941
2942 rate_control_rate_init(sta);
2943
2944 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2945 set_sta_flag(sta, WLAN_STA_MFP);
2946
2947 sta->sta.wme = elems.wmm_param;
2948
2949 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2950 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2951 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2952 if (err) {
2953 sdata_info(sdata,
2954 "failed to move station %pM to desired state\n",
2955 sta->sta.addr);
2956 WARN_ON(__sta_info_destroy(sta));
2957 mutex_unlock(&sdata->local->sta_mtx);
2958 ret = false;
2959 goto out;
2960 }
2961
2962 mutex_unlock(&sdata->local->sta_mtx);
2963
2964 /*
2965 * Always handle WMM once after association regardless
2966 * of the first value the AP uses. Setting -1 here has
2967 * that effect because the AP values is an unsigned
2968 * 4-bit value.
2969 */
2970 ifmgd->wmm_last_param_set = -1;
2971
2972 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
2973 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2974 elems.wmm_param_len);
2975 else
2976 ieee80211_set_wmm_default(sdata, false);
2977 changed |= BSS_CHANGED_QOS;
2978
2979 /* set AID and assoc capability,
2980 * ieee80211_set_associated() will tell the driver */
2981 bss_conf->aid = aid;
2982 bss_conf->assoc_capability = capab_info;
2983 ieee80211_set_associated(sdata, cbss, changed);
2984
2985 /*
2986 * If we're using 4-addr mode, let the AP know that we're
2987 * doing so, so that it can create the STA VLAN on its side
2988 */
2989 if (ifmgd->use_4addr)
2990 ieee80211_send_4addr_nullfunc(local, sdata);
2991
2992 /*
2993 * Start timer to probe the connection to the AP now.
2994 * Also start the timer that will detect beacon loss.
2995 */
2996 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2997 ieee80211_sta_reset_beacon_monitor(sdata);
2998
2999 ret = true;
3000 out:
3001 kfree(bss_ies);
3002 return ret;
3003 }
3004
3005 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3006 struct ieee80211_mgmt *mgmt,
3007 size_t len)
3008 {
3009 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3010 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3011 u16 capab_info, status_code, aid;
3012 struct ieee802_11_elems elems;
3013 int ac, uapsd_queues = -1;
3014 u8 *pos;
3015 bool reassoc;
3016 struct cfg80211_bss *bss;
3017
3018 sdata_assert_lock(sdata);
3019
3020 if (!assoc_data)
3021 return;
3022 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3023 return;
3024
3025 /*
3026 * AssocResp and ReassocResp have identical structure, so process both
3027 * of them in this function.
3028 */
3029
3030 if (len < 24 + 6)
3031 return;
3032
3033 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3034 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3035 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3036 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3037
3038 sdata_info(sdata,
3039 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3040 reassoc ? "Rea" : "A", mgmt->sa,
3041 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3042
3043 pos = mgmt->u.assoc_resp.variable;
3044 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3045
3046 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3047 elems.timeout_int &&
3048 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3049 u32 tu, ms;
3050 tu = le32_to_cpu(elems.timeout_int->value);
3051 ms = tu * 1024 / 1000;
3052 sdata_info(sdata,
3053 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3054 mgmt->sa, tu, ms);
3055 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3056 assoc_data->timeout_started = true;
3057 if (ms > IEEE80211_ASSOC_TIMEOUT)
3058 run_again(sdata, assoc_data->timeout);
3059 return;
3060 }
3061
3062 bss = assoc_data->bss;
3063
3064 if (status_code != WLAN_STATUS_SUCCESS) {
3065 sdata_info(sdata, "%pM denied association (code=%d)\n",
3066 mgmt->sa, status_code);
3067 ieee80211_destroy_assoc_data(sdata, false);
3068 } else {
3069 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3070 /* oops -- internal error -- send timeout for now */
3071 ieee80211_destroy_assoc_data(sdata, false);
3072 cfg80211_assoc_timeout(sdata->dev, bss);
3073 return;
3074 }
3075 sdata_info(sdata, "associated\n");
3076
3077 /*
3078 * destroy assoc_data afterwards, as otherwise an idle
3079 * recalc after assoc_data is NULL but before associated
3080 * is set can cause the interface to go idle
3081 */
3082 ieee80211_destroy_assoc_data(sdata, true);
3083
3084 /* get uapsd queues configuration */
3085 uapsd_queues = 0;
3086 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3087 if (sdata->tx_conf[ac].uapsd)
3088 uapsd_queues |= BIT(ac);
3089 }
3090
3091 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3092 }
3093
3094 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3095 struct ieee80211_mgmt *mgmt, size_t len,
3096 struct ieee80211_rx_status *rx_status,
3097 struct ieee802_11_elems *elems)
3098 {
3099 struct ieee80211_local *local = sdata->local;
3100 struct ieee80211_bss *bss;
3101 struct ieee80211_channel *channel;
3102
3103 sdata_assert_lock(sdata);
3104
3105 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3106 if (!channel)
3107 return;
3108
3109 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3110 channel);
3111 if (bss) {
3112 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3113 ieee80211_rx_bss_put(local, bss);
3114 }
3115 }
3116
3117
3118 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3119 struct sk_buff *skb)
3120 {
3121 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3122 struct ieee80211_if_managed *ifmgd;
3123 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3124 size_t baselen, len = skb->len;
3125 struct ieee802_11_elems elems;
3126
3127 ifmgd = &sdata->u.mgd;
3128
3129 sdata_assert_lock(sdata);
3130
3131 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3132 return; /* ignore ProbeResp to foreign address */
3133
3134 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3135 if (baselen > len)
3136 return;
3137
3138 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3139 false, &elems);
3140
3141 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3142
3143 if (ifmgd->associated &&
3144 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3145 ieee80211_reset_ap_probe(sdata);
3146
3147 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
3148 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
3149 /* got probe response, continue with auth */
3150 sdata_info(sdata, "direct probe responded\n");
3151 ifmgd->auth_data->tries = 0;
3152 ifmgd->auth_data->timeout = jiffies;
3153 ifmgd->auth_data->timeout_started = true;
3154 run_again(sdata, ifmgd->auth_data->timeout);
3155 }
3156 }
3157
3158 /*
3159 * This is the canonical list of information elements we care about,
3160 * the filter code also gives us all changes to the Microsoft OUI
3161 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3162 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3163 * changes to requested client power.
3164 *
3165 * We implement beacon filtering in software since that means we can
3166 * avoid processing the frame here and in cfg80211, and userspace
3167 * will not be able to tell whether the hardware supports it or not.
3168 *
3169 * XXX: This list needs to be dynamic -- userspace needs to be able to
3170 * add items it requires. It also needs to be able to tell us to
3171 * look out for other vendor IEs.
3172 */
3173 static const u64 care_about_ies =
3174 (1ULL << WLAN_EID_COUNTRY) |
3175 (1ULL << WLAN_EID_ERP_INFO) |
3176 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3177 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3178 (1ULL << WLAN_EID_HT_CAPABILITY) |
3179 (1ULL << WLAN_EID_HT_OPERATION);
3180
3181 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3182 struct ieee80211_mgmt *mgmt, size_t len,
3183 struct ieee80211_rx_status *rx_status)
3184 {
3185 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3186 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3187 size_t baselen;
3188 struct ieee802_11_elems elems;
3189 struct ieee80211_local *local = sdata->local;
3190 struct ieee80211_chanctx_conf *chanctx_conf;
3191 struct ieee80211_channel *chan;
3192 struct sta_info *sta;
3193 u32 changed = 0;
3194 bool erp_valid;
3195 u8 erp_value = 0;
3196 u32 ncrc;
3197 u8 *bssid;
3198 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3199
3200 sdata_assert_lock(sdata);
3201
3202 /* Process beacon from the current BSS */
3203 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3204 if (baselen > len)
3205 return;
3206
3207 rcu_read_lock();
3208 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3209 if (!chanctx_conf) {
3210 rcu_read_unlock();
3211 return;
3212 }
3213
3214 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3215 rcu_read_unlock();
3216 return;
3217 }
3218 chan = chanctx_conf->def.chan;
3219 rcu_read_unlock();
3220
3221 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3222 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3223 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3224 len - baselen, false, &elems);
3225
3226 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3227 if (elems.tim && !elems.parse_error) {
3228 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3229 ifmgd->dtim_period = tim_ie->dtim_period;
3230 }
3231 ifmgd->have_beacon = true;
3232 ifmgd->assoc_data->need_beacon = false;
3233 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3234 sdata->vif.bss_conf.sync_tsf =
3235 le64_to_cpu(mgmt->u.beacon.timestamp);
3236 sdata->vif.bss_conf.sync_device_ts =
3237 rx_status->device_timestamp;
3238 if (elems.tim)
3239 sdata->vif.bss_conf.sync_dtim_count =
3240 elems.tim->dtim_count;
3241 else
3242 sdata->vif.bss_conf.sync_dtim_count = 0;
3243 }
3244 /* continue assoc process */
3245 ifmgd->assoc_data->timeout = jiffies;
3246 ifmgd->assoc_data->timeout_started = true;
3247 run_again(sdata, ifmgd->assoc_data->timeout);
3248 return;
3249 }
3250
3251 if (!ifmgd->associated ||
3252 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3253 return;
3254 bssid = ifmgd->associated->bssid;
3255
3256 /* Track average RSSI from the Beacon frames of the current AP */
3257 ifmgd->last_beacon_signal = rx_status->signal;
3258 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3259 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3260 ifmgd->ave_beacon_signal = rx_status->signal * 16;
3261 ifmgd->last_cqm_event_signal = 0;
3262 ifmgd->count_beacon_signal = 1;
3263 ifmgd->last_ave_beacon_signal = 0;
3264 } else {
3265 ifmgd->ave_beacon_signal =
3266 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3267 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3268 ifmgd->ave_beacon_signal) / 16;
3269 ifmgd->count_beacon_signal++;
3270 }
3271
3272 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3273 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3274 int sig = ifmgd->ave_beacon_signal;
3275 int last_sig = ifmgd->last_ave_beacon_signal;
3276
3277 /*
3278 * if signal crosses either of the boundaries, invoke callback
3279 * with appropriate parameters
3280 */
3281 if (sig > ifmgd->rssi_max_thold &&
3282 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3283 ifmgd->last_ave_beacon_signal = sig;
3284 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3285 } else if (sig < ifmgd->rssi_min_thold &&
3286 (last_sig >= ifmgd->rssi_max_thold ||
3287 last_sig == 0)) {
3288 ifmgd->last_ave_beacon_signal = sig;
3289 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3290 }
3291 }
3292
3293 if (bss_conf->cqm_rssi_thold &&
3294 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3295 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3296 int sig = ifmgd->ave_beacon_signal / 16;
3297 int last_event = ifmgd->last_cqm_event_signal;
3298 int thold = bss_conf->cqm_rssi_thold;
3299 int hyst = bss_conf->cqm_rssi_hyst;
3300 if (sig < thold &&
3301 (last_event == 0 || sig < last_event - hyst)) {
3302 ifmgd->last_cqm_event_signal = sig;
3303 ieee80211_cqm_rssi_notify(
3304 &sdata->vif,
3305 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3306 GFP_KERNEL);
3307 } else if (sig > thold &&
3308 (last_event == 0 || sig > last_event + hyst)) {
3309 ifmgd->last_cqm_event_signal = sig;
3310 ieee80211_cqm_rssi_notify(
3311 &sdata->vif,
3312 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3313 GFP_KERNEL);
3314 }
3315 }
3316
3317 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3318 mlme_dbg_ratelimited(sdata,
3319 "cancelling AP probe due to a received beacon\n");
3320 ieee80211_reset_ap_probe(sdata);
3321 }
3322
3323 /*
3324 * Push the beacon loss detection into the future since
3325 * we are processing a beacon from the AP just now.
3326 */
3327 ieee80211_sta_reset_beacon_monitor(sdata);
3328
3329 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3330 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3331 len - baselen, false, &elems,
3332 care_about_ies, ncrc);
3333
3334 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3335 bool directed_tim = ieee80211_check_tim(elems.tim,
3336 elems.tim_len,
3337 ifmgd->aid);
3338 if (directed_tim) {
3339 if (local->hw.conf.dynamic_ps_timeout > 0) {
3340 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3341 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3342 ieee80211_hw_config(local,
3343 IEEE80211_CONF_CHANGE_PS);
3344 }
3345 ieee80211_send_nullfunc(local, sdata, 0);
3346 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3347 local->pspolling = true;
3348
3349 /*
3350 * Here is assumed that the driver will be
3351 * able to send ps-poll frame and receive a
3352 * response even though power save mode is
3353 * enabled, but some drivers might require
3354 * to disable power save here. This needs
3355 * to be investigated.
3356 */
3357 ieee80211_send_pspoll(local, sdata);
3358 }
3359 }
3360 }
3361
3362 if (sdata->vif.p2p) {
3363 struct ieee80211_p2p_noa_attr noa = {};
3364 int ret;
3365
3366 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3367 len - baselen,
3368 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3369 (u8 *) &noa, sizeof(noa));
3370 if (ret >= 2) {
3371 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3372 /* valid noa_attr and index changed */
3373 sdata->u.mgd.p2p_noa_index = noa.index;
3374 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3375 changed |= BSS_CHANGED_P2P_PS;
3376 /*
3377 * make sure we update all information, the CRC
3378 * mechanism doesn't look at P2P attributes.
3379 */
3380 ifmgd->beacon_crc_valid = false;
3381 }
3382 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3383 /* noa_attr not found and we had valid noa_attr before */
3384 sdata->u.mgd.p2p_noa_index = -1;
3385 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3386 changed |= BSS_CHANGED_P2P_PS;
3387 ifmgd->beacon_crc_valid = false;
3388 }
3389 }
3390
3391 if (ifmgd->csa_waiting_bcn)
3392 ieee80211_chswitch_post_beacon(sdata);
3393
3394 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3395 return;
3396 ifmgd->beacon_crc = ncrc;
3397 ifmgd->beacon_crc_valid = true;
3398
3399 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3400
3401 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3402 rx_status->device_timestamp,
3403 &elems, true);
3404
3405 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3406 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3407 elems.wmm_param_len))
3408 changed |= BSS_CHANGED_QOS;
3409
3410 /*
3411 * If we haven't had a beacon before, tell the driver about the
3412 * DTIM period (and beacon timing if desired) now.
3413 */
3414 if (!ifmgd->have_beacon) {
3415 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3416 if (elems.tim)
3417 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3418 else
3419 bss_conf->dtim_period = 1;
3420
3421 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3422 sdata->vif.bss_conf.sync_tsf =
3423 le64_to_cpu(mgmt->u.beacon.timestamp);
3424 sdata->vif.bss_conf.sync_device_ts =
3425 rx_status->device_timestamp;
3426 if (elems.tim)
3427 sdata->vif.bss_conf.sync_dtim_count =
3428 elems.tim->dtim_count;
3429 else
3430 sdata->vif.bss_conf.sync_dtim_count = 0;
3431 }
3432
3433 changed |= BSS_CHANGED_BEACON_INFO;
3434 ifmgd->have_beacon = true;
3435
3436 mutex_lock(&local->iflist_mtx);
3437 ieee80211_recalc_ps(local, -1);
3438 mutex_unlock(&local->iflist_mtx);
3439
3440 ieee80211_recalc_ps_vif(sdata);
3441 }
3442
3443 if (elems.erp_info) {
3444 erp_valid = true;
3445 erp_value = elems.erp_info[0];
3446 } else {
3447 erp_valid = false;
3448 }
3449 changed |= ieee80211_handle_bss_capability(sdata,
3450 le16_to_cpu(mgmt->u.beacon.capab_info),
3451 erp_valid, erp_value);
3452
3453 mutex_lock(&local->sta_mtx);
3454 sta = sta_info_get(sdata, bssid);
3455
3456 if (ieee80211_config_bw(sdata, sta,
3457 elems.ht_cap_elem, elems.ht_operation,
3458 elems.vht_operation, bssid, &changed)) {
3459 mutex_unlock(&local->sta_mtx);
3460 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3461 WLAN_REASON_DEAUTH_LEAVING,
3462 true, deauth_buf);
3463 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3464 sizeof(deauth_buf));
3465 return;
3466 }
3467
3468 if (sta && elems.opmode_notif)
3469 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3470 rx_status->band, true);
3471 mutex_unlock(&local->sta_mtx);
3472
3473 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3474 elems.country_elem,
3475 elems.country_elem_len,
3476 elems.pwr_constr_elem,
3477 elems.cisco_dtpc_elem);
3478
3479 ieee80211_bss_info_change_notify(sdata, changed);
3480 }
3481
3482 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3483 struct sk_buff *skb)
3484 {
3485 struct ieee80211_rx_status *rx_status;
3486 struct ieee80211_mgmt *mgmt;
3487 u16 fc;
3488 struct ieee802_11_elems elems;
3489 int ies_len;
3490
3491 rx_status = (struct ieee80211_rx_status *) skb->cb;
3492 mgmt = (struct ieee80211_mgmt *) skb->data;
3493 fc = le16_to_cpu(mgmt->frame_control);
3494
3495 sdata_lock(sdata);
3496
3497 switch (fc & IEEE80211_FCTL_STYPE) {
3498 case IEEE80211_STYPE_BEACON:
3499 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3500 break;
3501 case IEEE80211_STYPE_PROBE_RESP:
3502 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3503 break;
3504 case IEEE80211_STYPE_AUTH:
3505 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3506 break;
3507 case IEEE80211_STYPE_DEAUTH:
3508 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3509 break;
3510 case IEEE80211_STYPE_DISASSOC:
3511 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3512 break;
3513 case IEEE80211_STYPE_ASSOC_RESP:
3514 case IEEE80211_STYPE_REASSOC_RESP:
3515 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3516 break;
3517 case IEEE80211_STYPE_ACTION:
3518 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3519 ies_len = skb->len -
3520 offsetof(struct ieee80211_mgmt,
3521 u.action.u.chan_switch.variable);
3522
3523 if (ies_len < 0)
3524 break;
3525
3526 ieee802_11_parse_elems(
3527 mgmt->u.action.u.chan_switch.variable,
3528 ies_len, true, &elems);
3529
3530 if (elems.parse_error)
3531 break;
3532
3533 ieee80211_sta_process_chanswitch(sdata,
3534 rx_status->mactime,
3535 rx_status->device_timestamp,
3536 &elems, false);
3537 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3538 ies_len = skb->len -
3539 offsetof(struct ieee80211_mgmt,
3540 u.action.u.ext_chan_switch.variable);
3541
3542 if (ies_len < 0)
3543 break;
3544
3545 ieee802_11_parse_elems(
3546 mgmt->u.action.u.ext_chan_switch.variable,
3547 ies_len, true, &elems);
3548
3549 if (elems.parse_error)
3550 break;
3551
3552 /* for the handling code pretend this was also an IE */
3553 elems.ext_chansw_ie =
3554 &mgmt->u.action.u.ext_chan_switch.data;
3555
3556 ieee80211_sta_process_chanswitch(sdata,
3557 rx_status->mactime,
3558 rx_status->device_timestamp,
3559 &elems, false);
3560 }
3561 break;
3562 }
3563 sdata_unlock(sdata);
3564 }
3565
3566 static void ieee80211_sta_timer(unsigned long data)
3567 {
3568 struct ieee80211_sub_if_data *sdata =
3569 (struct ieee80211_sub_if_data *) data;
3570
3571 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3572 }
3573
3574 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3575 u8 *bssid, u8 reason, bool tx)
3576 {
3577 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3578
3579 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3580 tx, frame_buf);
3581
3582 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3583 IEEE80211_DEAUTH_FRAME_LEN);
3584 }
3585
3586 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3587 {
3588 struct ieee80211_local *local = sdata->local;
3589 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3590 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3591 u32 tx_flags = 0;
3592
3593 sdata_assert_lock(sdata);
3594
3595 if (WARN_ON_ONCE(!auth_data))
3596 return -EINVAL;
3597
3598 auth_data->tries++;
3599
3600 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3601 sdata_info(sdata, "authentication with %pM timed out\n",
3602 auth_data->bss->bssid);
3603
3604 /*
3605 * Most likely AP is not in the range so remove the
3606 * bss struct for that AP.
3607 */
3608 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3609
3610 return -ETIMEDOUT;
3611 }
3612
3613 drv_mgd_prepare_tx(local, sdata);
3614
3615 if (auth_data->bss->proberesp_ies) {
3616 u16 trans = 1;
3617 u16 status = 0;
3618
3619 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3620 auth_data->bss->bssid, auth_data->tries,
3621 IEEE80211_AUTH_MAX_TRIES);
3622
3623 auth_data->expected_transaction = 2;
3624
3625 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3626 trans = auth_data->sae_trans;
3627 status = auth_data->sae_status;
3628 auth_data->expected_transaction = trans;
3629 }
3630
3631 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3632 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3633 IEEE80211_TX_INTFL_MLME_CONN_TX;
3634
3635 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3636 auth_data->data, auth_data->data_len,
3637 auth_data->bss->bssid,
3638 auth_data->bss->bssid, NULL, 0, 0,
3639 tx_flags);
3640 } else {
3641 const u8 *ssidie;
3642
3643 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3644 auth_data->bss->bssid, auth_data->tries,
3645 IEEE80211_AUTH_MAX_TRIES);
3646
3647 rcu_read_lock();
3648 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3649 if (!ssidie) {
3650 rcu_read_unlock();
3651 return -EINVAL;
3652 }
3653 /*
3654 * Direct probe is sent to broadcast address as some APs
3655 * will not answer to direct packet in unassociated state.
3656 */
3657 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
3658 ssidie + 2, ssidie[1],
3659 NULL, 0, (u32) -1, true, 0,
3660 auth_data->bss->channel, false);
3661 rcu_read_unlock();
3662 }
3663
3664 if (tx_flags == 0) {
3665 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3666 auth_data->timeout_started = true;
3667 run_again(sdata, auth_data->timeout);
3668 } else {
3669 auth_data->timeout =
3670 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3671 auth_data->timeout_started = true;
3672 run_again(sdata, auth_data->timeout);
3673 }
3674
3675 return 0;
3676 }
3677
3678 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3679 {
3680 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3681 struct ieee80211_local *local = sdata->local;
3682
3683 sdata_assert_lock(sdata);
3684
3685 assoc_data->tries++;
3686 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3687 sdata_info(sdata, "association with %pM timed out\n",
3688 assoc_data->bss->bssid);
3689
3690 /*
3691 * Most likely AP is not in the range so remove the
3692 * bss struct for that AP.
3693 */
3694 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3695
3696 return -ETIMEDOUT;
3697 }
3698
3699 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3700 assoc_data->bss->bssid, assoc_data->tries,
3701 IEEE80211_ASSOC_MAX_TRIES);
3702 ieee80211_send_assoc(sdata);
3703
3704 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3705 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3706 assoc_data->timeout_started = true;
3707 run_again(sdata, assoc_data->timeout);
3708 } else {
3709 assoc_data->timeout =
3710 round_jiffies_up(jiffies +
3711 IEEE80211_ASSOC_TIMEOUT_LONG);
3712 assoc_data->timeout_started = true;
3713 run_again(sdata, assoc_data->timeout);
3714 }
3715
3716 return 0;
3717 }
3718
3719 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3720 __le16 fc, bool acked)
3721 {
3722 struct ieee80211_local *local = sdata->local;
3723
3724 sdata->u.mgd.status_fc = fc;
3725 sdata->u.mgd.status_acked = acked;
3726 sdata->u.mgd.status_received = true;
3727
3728 ieee80211_queue_work(&local->hw, &sdata->work);
3729 }
3730
3731 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3732 {
3733 struct ieee80211_local *local = sdata->local;
3734 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3735
3736 sdata_lock(sdata);
3737
3738 if (ifmgd->status_received) {
3739 __le16 fc = ifmgd->status_fc;
3740 bool status_acked = ifmgd->status_acked;
3741
3742 ifmgd->status_received = false;
3743 if (ifmgd->auth_data &&
3744 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3745 if (status_acked) {
3746 ifmgd->auth_data->timeout =
3747 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3748 run_again(sdata, ifmgd->auth_data->timeout);
3749 } else {
3750 ifmgd->auth_data->timeout = jiffies - 1;
3751 }
3752 ifmgd->auth_data->timeout_started = true;
3753 } else if (ifmgd->assoc_data &&
3754 (ieee80211_is_assoc_req(fc) ||
3755 ieee80211_is_reassoc_req(fc))) {
3756 if (status_acked) {
3757 ifmgd->assoc_data->timeout =
3758 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3759 run_again(sdata, ifmgd->assoc_data->timeout);
3760 } else {
3761 ifmgd->assoc_data->timeout = jiffies - 1;
3762 }
3763 ifmgd->assoc_data->timeout_started = true;
3764 }
3765 }
3766
3767 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3768 time_after(jiffies, ifmgd->auth_data->timeout)) {
3769 if (ifmgd->auth_data->done) {
3770 /*
3771 * ok ... we waited for assoc but userspace didn't,
3772 * so let's just kill the auth data
3773 */
3774 ieee80211_destroy_auth_data(sdata, false);
3775 } else if (ieee80211_probe_auth(sdata)) {
3776 u8 bssid[ETH_ALEN];
3777
3778 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3779
3780 ieee80211_destroy_auth_data(sdata, false);
3781
3782 cfg80211_auth_timeout(sdata->dev, bssid);
3783 }
3784 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3785 run_again(sdata, ifmgd->auth_data->timeout);
3786
3787 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3788 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3789 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3790 ieee80211_do_assoc(sdata)) {
3791 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3792
3793 ieee80211_destroy_assoc_data(sdata, false);
3794 cfg80211_assoc_timeout(sdata->dev, bss);
3795 }
3796 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3797 run_again(sdata, ifmgd->assoc_data->timeout);
3798
3799 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3800 ifmgd->associated) {
3801 u8 bssid[ETH_ALEN];
3802 int max_tries;
3803
3804 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3805
3806 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3807 max_tries = max_nullfunc_tries;
3808 else
3809 max_tries = max_probe_tries;
3810
3811 /* ACK received for nullfunc probing frame */
3812 if (!ifmgd->probe_send_count)
3813 ieee80211_reset_ap_probe(sdata);
3814 else if (ifmgd->nullfunc_failed) {
3815 if (ifmgd->probe_send_count < max_tries) {
3816 mlme_dbg(sdata,
3817 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3818 bssid, ifmgd->probe_send_count,
3819 max_tries);
3820 ieee80211_mgd_probe_ap_send(sdata);
3821 } else {
3822 mlme_dbg(sdata,
3823 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3824 bssid);
3825 ieee80211_sta_connection_lost(sdata, bssid,
3826 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3827 false);
3828 }
3829 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3830 run_again(sdata, ifmgd->probe_timeout);
3831 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3832 mlme_dbg(sdata,
3833 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3834 bssid, probe_wait_ms);
3835 ieee80211_sta_connection_lost(sdata, bssid,
3836 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3837 } else if (ifmgd->probe_send_count < max_tries) {
3838 mlme_dbg(sdata,
3839 "No probe response from AP %pM after %dms, try %d/%i\n",
3840 bssid, probe_wait_ms,
3841 ifmgd->probe_send_count, max_tries);
3842 ieee80211_mgd_probe_ap_send(sdata);
3843 } else {
3844 /*
3845 * We actually lost the connection ... or did we?
3846 * Let's make sure!
3847 */
3848 wiphy_debug(local->hw.wiphy,
3849 "%s: No probe response from AP %pM"
3850 " after %dms, disconnecting.\n",
3851 sdata->name,
3852 bssid, probe_wait_ms);
3853
3854 ieee80211_sta_connection_lost(sdata, bssid,
3855 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3856 }
3857 }
3858
3859 sdata_unlock(sdata);
3860 }
3861
3862 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3863 {
3864 struct ieee80211_sub_if_data *sdata =
3865 (struct ieee80211_sub_if_data *) data;
3866 struct ieee80211_local *local = sdata->local;
3867 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3868
3869 if (local->quiescing)
3870 return;
3871
3872 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3873 return;
3874
3875 sdata->u.mgd.connection_loss = false;
3876 ieee80211_queue_work(&sdata->local->hw,
3877 &sdata->u.mgd.beacon_connection_loss_work);
3878 }
3879
3880 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3881 {
3882 struct ieee80211_sub_if_data *sdata =
3883 (struct ieee80211_sub_if_data *) data;
3884 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3885 struct ieee80211_local *local = sdata->local;
3886
3887 if (local->quiescing)
3888 return;
3889
3890 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3891 return;
3892
3893 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3894 }
3895
3896 static void ieee80211_sta_monitor_work(struct work_struct *work)
3897 {
3898 struct ieee80211_sub_if_data *sdata =
3899 container_of(work, struct ieee80211_sub_if_data,
3900 u.mgd.monitor_work);
3901
3902 ieee80211_mgd_probe_ap(sdata, false);
3903 }
3904
3905 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3906 {
3907 u32 flags;
3908
3909 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3910 __ieee80211_stop_poll(sdata);
3911
3912 /* let's probe the connection once */
3913 flags = sdata->local->hw.flags;
3914 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3915 ieee80211_queue_work(&sdata->local->hw,
3916 &sdata->u.mgd.monitor_work);
3917 /* and do all the other regular work too */
3918 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3919 }
3920 }
3921
3922 #ifdef CONFIG_PM
3923 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3924 {
3925 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3926 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3927
3928 sdata_lock(sdata);
3929
3930 if (ifmgd->auth_data || ifmgd->assoc_data) {
3931 const u8 *bssid = ifmgd->auth_data ?
3932 ifmgd->auth_data->bss->bssid :
3933 ifmgd->assoc_data->bss->bssid;
3934
3935 /*
3936 * If we are trying to authenticate / associate while suspending,
3937 * cfg80211 won't know and won't actually abort those attempts,
3938 * thus we need to do that ourselves.
3939 */
3940 ieee80211_send_deauth_disassoc(sdata, bssid,
3941 IEEE80211_STYPE_DEAUTH,
3942 WLAN_REASON_DEAUTH_LEAVING,
3943 false, frame_buf);
3944 if (ifmgd->assoc_data)
3945 ieee80211_destroy_assoc_data(sdata, false);
3946 if (ifmgd->auth_data)
3947 ieee80211_destroy_auth_data(sdata, false);
3948 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3949 IEEE80211_DEAUTH_FRAME_LEN);
3950 }
3951
3952 sdata_unlock(sdata);
3953 }
3954
3955 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3956 {
3957 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3958
3959 sdata_lock(sdata);
3960 if (!ifmgd->associated) {
3961 sdata_unlock(sdata);
3962 return;
3963 }
3964
3965 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3966 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3967 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3968 ieee80211_sta_connection_lost(sdata,
3969 ifmgd->associated->bssid,
3970 WLAN_REASON_UNSPECIFIED,
3971 true);
3972 sdata_unlock(sdata);
3973 return;
3974 }
3975 sdata_unlock(sdata);
3976 }
3977 #endif
3978
3979 /* interface setup */
3980 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3981 {
3982 struct ieee80211_if_managed *ifmgd;
3983
3984 ifmgd = &sdata->u.mgd;
3985 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3986 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3987 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3988 ieee80211_beacon_connection_loss_work);
3989 INIT_WORK(&ifmgd->csa_connection_drop_work,
3990 ieee80211_csa_connection_drop_work);
3991 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
3992 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
3993 ieee80211_tdls_peer_del_work);
3994 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3995 (unsigned long) sdata);
3996 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3997 (unsigned long) sdata);
3998 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3999 (unsigned long) sdata);
4000 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4001 (unsigned long) sdata);
4002 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4003 ieee80211_sta_handle_tspec_ac_params_wk);
4004
4005 ifmgd->flags = 0;
4006 ifmgd->powersave = sdata->wdev.ps;
4007 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4008 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4009 ifmgd->p2p_noa_index = -1;
4010
4011 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4012 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4013 else
4014 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4015
4016 /* Setup TDLS data */
4017 spin_lock_init(&ifmgd->teardown_lock);
4018 ifmgd->teardown_skb = NULL;
4019 ifmgd->orig_teardown_skb = NULL;
4020 }
4021
4022 /* scan finished notification */
4023 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4024 {
4025 struct ieee80211_sub_if_data *sdata;
4026
4027 /* Restart STA timers */
4028 rcu_read_lock();
4029 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4030 if (ieee80211_sdata_running(sdata))
4031 ieee80211_restart_sta_timer(sdata);
4032 }
4033 rcu_read_unlock();
4034 }
4035
4036 int ieee80211_max_network_latency(struct notifier_block *nb,
4037 unsigned long data, void *dummy)
4038 {
4039 s32 latency_usec = (s32) data;
4040 struct ieee80211_local *local =
4041 container_of(nb, struct ieee80211_local,
4042 network_latency_notifier);
4043
4044 mutex_lock(&local->iflist_mtx);
4045 ieee80211_recalc_ps(local, latency_usec);
4046 mutex_unlock(&local->iflist_mtx);
4047
4048 return NOTIFY_OK;
4049 }
4050
4051 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4052 struct cfg80211_bss *cbss)
4053 {
4054 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4055 const u8 *ht_cap_ie, *vht_cap_ie;
4056 const struct ieee80211_ht_cap *ht_cap;
4057 const struct ieee80211_vht_cap *vht_cap;
4058 u8 chains = 1;
4059
4060 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4061 return chains;
4062
4063 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4064 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4065 ht_cap = (void *)(ht_cap_ie + 2);
4066 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4067 /*
4068 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4069 * "Tx Unequal Modulation Supported" fields.
4070 */
4071 }
4072
4073 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4074 return chains;
4075
4076 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4077 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4078 u8 nss;
4079 u16 tx_mcs_map;
4080
4081 vht_cap = (void *)(vht_cap_ie + 2);
4082 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4083 for (nss = 8; nss > 0; nss--) {
4084 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4085 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4086 break;
4087 }
4088 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4089 chains = max(chains, nss);
4090 }
4091
4092 return chains;
4093 }
4094
4095 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4096 struct cfg80211_bss *cbss)
4097 {
4098 struct ieee80211_local *local = sdata->local;
4099 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4100 const struct ieee80211_ht_cap *ht_cap = NULL;
4101 const struct ieee80211_ht_operation *ht_oper = NULL;
4102 const struct ieee80211_vht_operation *vht_oper = NULL;
4103 struct ieee80211_supported_band *sband;
4104 struct cfg80211_chan_def chandef;
4105 int ret;
4106
4107 sband = local->hw.wiphy->bands[cbss->channel->band];
4108
4109 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4110 IEEE80211_STA_DISABLE_80P80MHZ |
4111 IEEE80211_STA_DISABLE_160MHZ);
4112
4113 rcu_read_lock();
4114
4115 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4116 sband->ht_cap.ht_supported) {
4117 const u8 *ht_oper_ie, *ht_cap_ie;
4118
4119 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4120 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4121 ht_oper = (void *)(ht_oper_ie + 2);
4122
4123 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4124 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4125 ht_cap = (void *)(ht_cap_ie + 2);
4126
4127 if (!ht_cap) {
4128 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4129 ht_oper = NULL;
4130 }
4131 }
4132
4133 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4134 sband->vht_cap.vht_supported) {
4135 const u8 *vht_oper_ie, *vht_cap;
4136
4137 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4138 WLAN_EID_VHT_OPERATION);
4139 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4140 vht_oper = (void *)(vht_oper_ie + 2);
4141 if (vht_oper && !ht_oper) {
4142 vht_oper = NULL;
4143 sdata_info(sdata,
4144 "AP advertised VHT without HT, disabling both\n");
4145 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4146 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4147 }
4148
4149 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4150 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4151 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4152 vht_oper = NULL;
4153 }
4154 }
4155
4156 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4157 cbss->channel,
4158 ht_cap, ht_oper, vht_oper,
4159 &chandef, false);
4160
4161 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4162 local->rx_chains);
4163
4164 rcu_read_unlock();
4165
4166 /* will change later if needed */
4167 sdata->smps_mode = IEEE80211_SMPS_OFF;
4168
4169 mutex_lock(&local->mtx);
4170 /*
4171 * If this fails (possibly due to channel context sharing
4172 * on incompatible channels, e.g. 80+80 and 160 sharing the
4173 * same control channel) try to use a smaller bandwidth.
4174 */
4175 ret = ieee80211_vif_use_channel(sdata, &chandef,
4176 IEEE80211_CHANCTX_SHARED);
4177
4178 /* don't downgrade for 5 and 10 MHz channels, though. */
4179 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4180 chandef.width == NL80211_CHAN_WIDTH_10)
4181 goto out;
4182
4183 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4184 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4185 ret = ieee80211_vif_use_channel(sdata, &chandef,
4186 IEEE80211_CHANCTX_SHARED);
4187 }
4188 out:
4189 mutex_unlock(&local->mtx);
4190 return ret;
4191 }
4192
4193 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4194 struct cfg80211_bss *cbss, bool assoc)
4195 {
4196 struct ieee80211_local *local = sdata->local;
4197 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4198 struct ieee80211_bss *bss = (void *)cbss->priv;
4199 struct sta_info *new_sta = NULL;
4200 bool have_sta = false;
4201 int err;
4202
4203 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4204 return -EINVAL;
4205
4206 if (assoc) {
4207 rcu_read_lock();
4208 have_sta = sta_info_get(sdata, cbss->bssid);
4209 rcu_read_unlock();
4210 }
4211
4212 if (!have_sta) {
4213 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4214 if (!new_sta)
4215 return -ENOMEM;
4216 }
4217 if (new_sta) {
4218 u32 rates = 0, basic_rates = 0;
4219 bool have_higher_than_11mbit;
4220 int min_rate = INT_MAX, min_rate_index = -1;
4221 struct ieee80211_chanctx_conf *chanctx_conf;
4222 struct ieee80211_supported_band *sband;
4223 const struct cfg80211_bss_ies *ies;
4224 int shift;
4225 u32 rate_flags;
4226
4227 sband = local->hw.wiphy->bands[cbss->channel->band];
4228
4229 err = ieee80211_prep_channel(sdata, cbss);
4230 if (err) {
4231 sta_info_free(local, new_sta);
4232 return -EINVAL;
4233 }
4234 shift = ieee80211_vif_get_shift(&sdata->vif);
4235
4236 rcu_read_lock();
4237 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4238 if (WARN_ON(!chanctx_conf)) {
4239 rcu_read_unlock();
4240 sta_info_free(local, new_sta);
4241 return -EINVAL;
4242 }
4243 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4244 rcu_read_unlock();
4245
4246 ieee80211_get_rates(sband, bss->supp_rates,
4247 bss->supp_rates_len,
4248 &rates, &basic_rates,
4249 &have_higher_than_11mbit,
4250 &min_rate, &min_rate_index,
4251 shift, rate_flags);
4252
4253 /*
4254 * This used to be a workaround for basic rates missing
4255 * in the association response frame. Now that we no
4256 * longer use the basic rates from there, it probably
4257 * doesn't happen any more, but keep the workaround so
4258 * in case some *other* APs are buggy in different ways
4259 * we can connect -- with a warning.
4260 */
4261 if (!basic_rates && min_rate_index >= 0) {
4262 sdata_info(sdata,
4263 "No basic rates, using min rate instead\n");
4264 basic_rates = BIT(min_rate_index);
4265 }
4266
4267 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4268 sdata->vif.bss_conf.basic_rates = basic_rates;
4269
4270 /* cf. IEEE 802.11 9.2.12 */
4271 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4272 have_higher_than_11mbit)
4273 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4274 else
4275 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4276
4277 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4278
4279 /* set timing information */
4280 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4281 rcu_read_lock();
4282 ies = rcu_dereference(cbss->beacon_ies);
4283 if (ies) {
4284 const u8 *tim_ie;
4285
4286 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4287 sdata->vif.bss_conf.sync_device_ts =
4288 bss->device_ts_beacon;
4289 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4290 ies->data, ies->len);
4291 if (tim_ie && tim_ie[1] >= 2)
4292 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4293 else
4294 sdata->vif.bss_conf.sync_dtim_count = 0;
4295 } else if (!(local->hw.flags &
4296 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4297 ies = rcu_dereference(cbss->proberesp_ies);
4298 /* must be non-NULL since beacon IEs were NULL */
4299 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4300 sdata->vif.bss_conf.sync_device_ts =
4301 bss->device_ts_presp;
4302 sdata->vif.bss_conf.sync_dtim_count = 0;
4303 } else {
4304 sdata->vif.bss_conf.sync_tsf = 0;
4305 sdata->vif.bss_conf.sync_device_ts = 0;
4306 sdata->vif.bss_conf.sync_dtim_count = 0;
4307 }
4308 rcu_read_unlock();
4309
4310 /* tell driver about BSSID, basic rates and timing */
4311 ieee80211_bss_info_change_notify(sdata,
4312 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4313 BSS_CHANGED_BEACON_INT);
4314
4315 if (assoc)
4316 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4317
4318 err = sta_info_insert(new_sta);
4319 new_sta = NULL;
4320 if (err) {
4321 sdata_info(sdata,
4322 "failed to insert STA entry for the AP (error %d)\n",
4323 err);
4324 return err;
4325 }
4326 } else
4327 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4328
4329 return 0;
4330 }
4331
4332 /* config hooks */
4333 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4334 struct cfg80211_auth_request *req)
4335 {
4336 struct ieee80211_local *local = sdata->local;
4337 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4338 struct ieee80211_mgd_auth_data *auth_data;
4339 u16 auth_alg;
4340 int err;
4341
4342 /* prepare auth data structure */
4343
4344 switch (req->auth_type) {
4345 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4346 auth_alg = WLAN_AUTH_OPEN;
4347 break;
4348 case NL80211_AUTHTYPE_SHARED_KEY:
4349 if (IS_ERR(local->wep_tx_tfm))
4350 return -EOPNOTSUPP;
4351 auth_alg = WLAN_AUTH_SHARED_KEY;
4352 break;
4353 case NL80211_AUTHTYPE_FT:
4354 auth_alg = WLAN_AUTH_FT;
4355 break;
4356 case NL80211_AUTHTYPE_NETWORK_EAP:
4357 auth_alg = WLAN_AUTH_LEAP;
4358 break;
4359 case NL80211_AUTHTYPE_SAE:
4360 auth_alg = WLAN_AUTH_SAE;
4361 break;
4362 default:
4363 return -EOPNOTSUPP;
4364 }
4365
4366 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4367 req->ie_len, GFP_KERNEL);
4368 if (!auth_data)
4369 return -ENOMEM;
4370
4371 auth_data->bss = req->bss;
4372
4373 if (req->sae_data_len >= 4) {
4374 __le16 *pos = (__le16 *) req->sae_data;
4375 auth_data->sae_trans = le16_to_cpu(pos[0]);
4376 auth_data->sae_status = le16_to_cpu(pos[1]);
4377 memcpy(auth_data->data, req->sae_data + 4,
4378 req->sae_data_len - 4);
4379 auth_data->data_len += req->sae_data_len - 4;
4380 }
4381
4382 if (req->ie && req->ie_len) {
4383 memcpy(&auth_data->data[auth_data->data_len],
4384 req->ie, req->ie_len);
4385 auth_data->data_len += req->ie_len;
4386 }
4387
4388 if (req->key && req->key_len) {
4389 auth_data->key_len = req->key_len;
4390 auth_data->key_idx = req->key_idx;
4391 memcpy(auth_data->key, req->key, req->key_len);
4392 }
4393
4394 auth_data->algorithm = auth_alg;
4395
4396 /* try to authenticate/probe */
4397
4398 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4399 ifmgd->assoc_data) {
4400 err = -EBUSY;
4401 goto err_free;
4402 }
4403
4404 if (ifmgd->auth_data)
4405 ieee80211_destroy_auth_data(sdata, false);
4406
4407 /* prep auth_data so we don't go into idle on disassoc */
4408 ifmgd->auth_data = auth_data;
4409
4410 if (ifmgd->associated) {
4411 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4412
4413 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4414 WLAN_REASON_UNSPECIFIED,
4415 false, frame_buf);
4416
4417 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4418 sizeof(frame_buf));
4419 }
4420
4421 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4422
4423 err = ieee80211_prep_connection(sdata, req->bss, false);
4424 if (err)
4425 goto err_clear;
4426
4427 err = ieee80211_probe_auth(sdata);
4428 if (err) {
4429 sta_info_destroy_addr(sdata, req->bss->bssid);
4430 goto err_clear;
4431 }
4432
4433 /* hold our own reference */
4434 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4435 return 0;
4436
4437 err_clear:
4438 memset(ifmgd->bssid, 0, ETH_ALEN);
4439 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4440 ifmgd->auth_data = NULL;
4441 err_free:
4442 kfree(auth_data);
4443 return err;
4444 }
4445
4446 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4447 const u8 *wmm_param, int len)
4448 {
4449 const u8 *pos;
4450 size_t left;
4451
4452 if (len < 8)
4453 return false;
4454
4455 if (wmm_param[5] != 1 /* version */)
4456 return false;
4457
4458 pos = wmm_param + 8;
4459 left = len - 8;
4460
4461 for (; left >= 4; left -= 4, pos += 4) {
4462 u8 aifsn = pos[0] & 0x0f;
4463 u8 ecwmin = pos[1] & 0x0f;
4464 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4465 int aci = (pos[0] >> 5) & 0x03;
4466
4467 if (aifsn < 2) {
4468 sdata_info(sdata,
4469 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4470 aifsn, aci);
4471 return false;
4472 }
4473 if (ecwmin > ecwmax) {
4474 sdata_info(sdata,
4475 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4476 ecwmin, ecwmax, aci);
4477 return false;
4478 }
4479 }
4480
4481 return true;
4482 }
4483
4484 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4485 struct cfg80211_assoc_request *req)
4486 {
4487 struct ieee80211_local *local = sdata->local;
4488 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4489 struct ieee80211_bss *bss = (void *)req->bss->priv;
4490 struct ieee80211_mgd_assoc_data *assoc_data;
4491 const struct cfg80211_bss_ies *beacon_ies;
4492 struct ieee80211_supported_band *sband;
4493 const u8 *ssidie, *ht_ie, *vht_ie;
4494 int i, err;
4495
4496 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4497 if (!assoc_data)
4498 return -ENOMEM;
4499
4500 rcu_read_lock();
4501 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4502 if (!ssidie) {
4503 rcu_read_unlock();
4504 kfree(assoc_data);
4505 return -EINVAL;
4506 }
4507 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4508 assoc_data->ssid_len = ssidie[1];
4509 rcu_read_unlock();
4510
4511 if (ifmgd->associated) {
4512 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4513
4514 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4515 WLAN_REASON_UNSPECIFIED,
4516 false, frame_buf);
4517
4518 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4519 sizeof(frame_buf));
4520 }
4521
4522 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4523 err = -EBUSY;
4524 goto err_free;
4525 }
4526
4527 if (ifmgd->assoc_data) {
4528 err = -EBUSY;
4529 goto err_free;
4530 }
4531
4532 if (ifmgd->auth_data) {
4533 bool match;
4534
4535 /* keep sta info, bssid if matching */
4536 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4537 ieee80211_destroy_auth_data(sdata, match);
4538 }
4539
4540 /* prepare assoc data */
4541
4542 ifmgd->beacon_crc_valid = false;
4543
4544 assoc_data->wmm = bss->wmm_used &&
4545 (local->hw.queues >= IEEE80211_NUM_ACS);
4546 if (assoc_data->wmm) {
4547 /* try to check validity of WMM params IE */
4548 const struct cfg80211_bss_ies *ies;
4549 const u8 *wp, *start, *end;
4550
4551 rcu_read_lock();
4552 ies = rcu_dereference(req->bss->ies);
4553 start = ies->data;
4554 end = start + ies->len;
4555
4556 while (true) {
4557 wp = cfg80211_find_vendor_ie(
4558 WLAN_OUI_MICROSOFT,
4559 WLAN_OUI_TYPE_MICROSOFT_WMM,
4560 start, end - start);
4561 if (!wp)
4562 break;
4563 start = wp + wp[1] + 2;
4564 /* if this IE is too short, try the next */
4565 if (wp[1] <= 4)
4566 continue;
4567 /* if this IE is WMM params, we found what we wanted */
4568 if (wp[6] == 1)
4569 break;
4570 }
4571
4572 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4573 wp[1] - 2)) {
4574 assoc_data->wmm = false;
4575 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4576 }
4577 rcu_read_unlock();
4578 }
4579
4580 /*
4581 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4582 * We still associate in non-HT mode (11a/b/g) if any one of these
4583 * ciphers is configured as pairwise.
4584 * We can set this to true for non-11n hardware, that'll be checked
4585 * separately along with the peer capabilities.
4586 */
4587 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4588 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4589 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4590 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4591 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4592 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4593 netdev_info(sdata->dev,
4594 "disabling HT/VHT due to WEP/TKIP use\n");
4595 }
4596 }
4597
4598 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4599 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4600 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4601 }
4602
4603 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4604 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4605
4606 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4607 sband = local->hw.wiphy->bands[req->bss->channel->band];
4608 if (!sband->ht_cap.ht_supported ||
4609 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4610 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4611 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4612 if (!bss->wmm_used &&
4613 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4614 netdev_info(sdata->dev,
4615 "disabling HT as WMM/QoS is not supported by the AP\n");
4616 }
4617
4618 /* disable VHT if we don't support it or the AP doesn't use WMM */
4619 if (!sband->vht_cap.vht_supported ||
4620 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4621 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4622 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4623 if (!bss->wmm_used &&
4624 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4625 netdev_info(sdata->dev,
4626 "disabling VHT as WMM/QoS is not supported by the AP\n");
4627 }
4628
4629 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4630 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4631 sizeof(ifmgd->ht_capa_mask));
4632
4633 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4634 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4635 sizeof(ifmgd->vht_capa_mask));
4636
4637 if (req->ie && req->ie_len) {
4638 memcpy(assoc_data->ie, req->ie, req->ie_len);
4639 assoc_data->ie_len = req->ie_len;
4640 }
4641
4642 assoc_data->bss = req->bss;
4643
4644 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4645 if (ifmgd->powersave)
4646 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4647 else
4648 sdata->smps_mode = IEEE80211_SMPS_OFF;
4649 } else
4650 sdata->smps_mode = ifmgd->req_smps;
4651
4652 assoc_data->capability = req->bss->capability;
4653 assoc_data->supp_rates = bss->supp_rates;
4654 assoc_data->supp_rates_len = bss->supp_rates_len;
4655
4656 rcu_read_lock();
4657 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4658 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4659 assoc_data->ap_ht_param =
4660 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4661 else
4662 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4663 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4664 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4665 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4666 sizeof(struct ieee80211_vht_cap));
4667 else
4668 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4669 rcu_read_unlock();
4670
4671 if (bss->wmm_used && bss->uapsd_supported &&
4672 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
4673 assoc_data->uapsd = true;
4674 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4675 } else {
4676 assoc_data->uapsd = false;
4677 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4678 }
4679
4680 if (req->prev_bssid)
4681 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4682
4683 if (req->use_mfp) {
4684 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4685 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4686 } else {
4687 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4688 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4689 }
4690
4691 if (req->flags & ASSOC_REQ_USE_RRM)
4692 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4693 else
4694 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4695
4696 if (req->crypto.control_port)
4697 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4698 else
4699 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4700
4701 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4702 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4703 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4704 sdata->vif.type);
4705
4706 /* kick off associate process */
4707
4708 ifmgd->assoc_data = assoc_data;
4709 ifmgd->dtim_period = 0;
4710 ifmgd->have_beacon = false;
4711
4712 err = ieee80211_prep_connection(sdata, req->bss, true);
4713 if (err)
4714 goto err_clear;
4715
4716 rcu_read_lock();
4717 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4718
4719 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4720 !beacon_ies) {
4721 /*
4722 * Wait up to one beacon interval ...
4723 * should this be more if we miss one?
4724 */
4725 sdata_info(sdata, "waiting for beacon from %pM\n",
4726 ifmgd->bssid);
4727 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4728 assoc_data->timeout_started = true;
4729 assoc_data->need_beacon = true;
4730 } else if (beacon_ies) {
4731 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4732 beacon_ies->data,
4733 beacon_ies->len);
4734 u8 dtim_count = 0;
4735
4736 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4737 const struct ieee80211_tim_ie *tim;
4738 tim = (void *)(tim_ie + 2);
4739 ifmgd->dtim_period = tim->dtim_period;
4740 dtim_count = tim->dtim_count;
4741 }
4742 ifmgd->have_beacon = true;
4743 assoc_data->timeout = jiffies;
4744 assoc_data->timeout_started = true;
4745
4746 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4747 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4748 sdata->vif.bss_conf.sync_device_ts =
4749 bss->device_ts_beacon;
4750 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4751 }
4752 } else {
4753 assoc_data->timeout = jiffies;
4754 assoc_data->timeout_started = true;
4755 }
4756 rcu_read_unlock();
4757
4758 run_again(sdata, assoc_data->timeout);
4759
4760 if (bss->corrupt_data) {
4761 char *corrupt_type = "data";
4762 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4763 if (bss->corrupt_data &
4764 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4765 corrupt_type = "beacon and probe response";
4766 else
4767 corrupt_type = "beacon";
4768 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4769 corrupt_type = "probe response";
4770 sdata_info(sdata, "associating with AP with corrupt %s\n",
4771 corrupt_type);
4772 }
4773
4774 return 0;
4775 err_clear:
4776 memset(ifmgd->bssid, 0, ETH_ALEN);
4777 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4778 ifmgd->assoc_data = NULL;
4779 err_free:
4780 kfree(assoc_data);
4781 return err;
4782 }
4783
4784 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4785 struct cfg80211_deauth_request *req)
4786 {
4787 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4788 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4789 bool tx = !req->local_state_change;
4790
4791 if (ifmgd->auth_data &&
4792 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4793 sdata_info(sdata,
4794 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4795 req->bssid, req->reason_code,
4796 ieee80211_get_reason_code_string(req->reason_code));
4797
4798 drv_mgd_prepare_tx(sdata->local, sdata);
4799 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4800 IEEE80211_STYPE_DEAUTH,
4801 req->reason_code, tx,
4802 frame_buf);
4803 ieee80211_destroy_auth_data(sdata, false);
4804 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4805 IEEE80211_DEAUTH_FRAME_LEN);
4806
4807 return 0;
4808 }
4809
4810 if (ifmgd->associated &&
4811 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4812 sdata_info(sdata,
4813 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4814 req->bssid, req->reason_code,
4815 ieee80211_get_reason_code_string(req->reason_code));
4816
4817 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4818 req->reason_code, tx, frame_buf);
4819 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4820 IEEE80211_DEAUTH_FRAME_LEN);
4821 return 0;
4822 }
4823
4824 return -ENOTCONN;
4825 }
4826
4827 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4828 struct cfg80211_disassoc_request *req)
4829 {
4830 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4831 u8 bssid[ETH_ALEN];
4832 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4833
4834 /*
4835 * cfg80211 should catch this ... but it's racy since
4836 * we can receive a disassoc frame, process it, hand it
4837 * to cfg80211 while that's in a locked section already
4838 * trying to tell us that the user wants to disconnect.
4839 */
4840 if (ifmgd->associated != req->bss)
4841 return -ENOLINK;
4842
4843 sdata_info(sdata,
4844 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4845 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4846
4847 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4848 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4849 req->reason_code, !req->local_state_change,
4850 frame_buf);
4851
4852 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4853 IEEE80211_DEAUTH_FRAME_LEN);
4854
4855 return 0;
4856 }
4857
4858 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4859 {
4860 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4861
4862 /*
4863 * Make sure some work items will not run after this,
4864 * they will not do anything but might not have been
4865 * cancelled when disconnecting.
4866 */
4867 cancel_work_sync(&ifmgd->monitor_work);
4868 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4869 cancel_work_sync(&ifmgd->request_smps_work);
4870 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4871 cancel_work_sync(&ifmgd->chswitch_work);
4872 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
4873
4874 sdata_lock(sdata);
4875 if (ifmgd->assoc_data) {
4876 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4877 ieee80211_destroy_assoc_data(sdata, false);
4878 cfg80211_assoc_timeout(sdata->dev, bss);
4879 }
4880 if (ifmgd->auth_data)
4881 ieee80211_destroy_auth_data(sdata, false);
4882 spin_lock_bh(&ifmgd->teardown_lock);
4883 if (ifmgd->teardown_skb) {
4884 kfree_skb(ifmgd->teardown_skb);
4885 ifmgd->teardown_skb = NULL;
4886 ifmgd->orig_teardown_skb = NULL;
4887 }
4888 spin_unlock_bh(&ifmgd->teardown_lock);
4889 del_timer_sync(&ifmgd->timer);
4890 sdata_unlock(sdata);
4891 }
4892
4893 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4894 enum nl80211_cqm_rssi_threshold_event rssi_event,
4895 gfp_t gfp)
4896 {
4897 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4898
4899 trace_api_cqm_rssi_notify(sdata, rssi_event);
4900
4901 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4902 }
4903 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
4904
4905 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
4906 {
4907 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4908
4909 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
4910
4911 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
4912 }
4913 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
Linux kernel - Deliverables
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