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mac80211: notify channel switch at the end of ieee80211_chswitch_post_beacon()
[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 goto out;
178 }
179
180 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
181 channel->band);
182 /* check that channel matches the right operating channel */
183 if (!tracking && channel->center_freq != ht_cfreq) {
184 /*
185 * It's possible that some APs are confused here;
186 * Netgear WNDR3700 sometimes reports 4 higher than
187 * the actual channel in association responses, but
188 * since we look at probe response/beacon data here
189 * it should be OK.
190 */
191 sdata_info(sdata,
192 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
193 channel->center_freq, ht_cfreq,
194 ht_oper->primary_chan, channel->band);
195 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
196 goto out;
197 }
198
199 /* check 40 MHz support, if we have it */
200 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
201 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
202 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
203 chandef->width = NL80211_CHAN_WIDTH_40;
204 chandef->center_freq1 += 10;
205 break;
206 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
207 chandef->width = NL80211_CHAN_WIDTH_40;
208 chandef->center_freq1 -= 10;
209 break;
210 }
211 } else {
212 /* 40 MHz (and 80 MHz) must be supported for VHT */
213 ret = IEEE80211_STA_DISABLE_VHT;
214 /* also mark 40 MHz disabled */
215 ret |= IEEE80211_STA_DISABLE_40MHZ;
216 goto out;
217 }
218
219 if (!vht_oper || !sband->vht_cap.vht_supported) {
220 ret = IEEE80211_STA_DISABLE_VHT;
221 goto out;
222 }
223
224 vht_chandef.chan = channel;
225 vht_chandef.center_freq1 =
226 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
227 channel->band);
228 vht_chandef.center_freq2 = 0;
229
230 switch (vht_oper->chan_width) {
231 case IEEE80211_VHT_CHANWIDTH_USE_HT:
232 vht_chandef.width = chandef->width;
233 vht_chandef.center_freq1 = chandef->center_freq1;
234 break;
235 case IEEE80211_VHT_CHANWIDTH_80MHZ:
236 vht_chandef.width = NL80211_CHAN_WIDTH_80;
237 break;
238 case IEEE80211_VHT_CHANWIDTH_160MHZ:
239 vht_chandef.width = NL80211_CHAN_WIDTH_160;
240 break;
241 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
242 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
243 vht_chandef.center_freq2 =
244 ieee80211_channel_to_frequency(
245 vht_oper->center_freq_seg2_idx,
246 channel->band);
247 break;
248 default:
249 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
250 sdata_info(sdata,
251 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
252 vht_oper->chan_width);
253 ret = IEEE80211_STA_DISABLE_VHT;
254 goto out;
255 }
256
257 if (!cfg80211_chandef_valid(&vht_chandef)) {
258 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
259 sdata_info(sdata,
260 "AP VHT information is invalid, disable VHT\n");
261 ret = IEEE80211_STA_DISABLE_VHT;
262 goto out;
263 }
264
265 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
266 ret = 0;
267 goto out;
268 }
269
270 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
271 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
272 sdata_info(sdata,
273 "AP VHT information doesn't match HT, disable VHT\n");
274 ret = IEEE80211_STA_DISABLE_VHT;
275 goto out;
276 }
277
278 *chandef = vht_chandef;
279
280 ret = 0;
281
282 out:
283 /*
284 * When tracking the current AP, don't do any further checks if the
285 * new chandef is identical to the one we're currently using for the
286 * connection. This keeps us from playing ping-pong with regulatory,
287 * without it the following can happen (for example):
288 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
289 * - AP advertises regdom US
290 * - CRDA loads regdom US with 80 MHz prohibited (old database)
291 * - the code below detects an unsupported channel, downgrades, and
292 * we disconnect from the AP in the caller
293 * - disconnect causes CRDA to reload world regdomain and the game
294 * starts anew.
295 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
296 *
297 * It seems possible that there are still scenarios with CSA or real
298 * bandwidth changes where a this could happen, but those cases are
299 * less common and wouldn't completely prevent using the AP.
300 */
301 if (tracking &&
302 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
303 return ret;
304
305 /* don't print the message below for VHT mismatch if VHT is disabled */
306 if (ret & IEEE80211_STA_DISABLE_VHT)
307 vht_chandef = *chandef;
308
309 /*
310 * Ignore the DISABLED flag when we're already connected and only
311 * tracking the APs beacon for bandwidth changes - otherwise we
312 * might get disconnected here if we connect to an AP, update our
313 * regulatory information based on the AP's country IE and the
314 * information we have is wrong/outdated and disables the channel
315 * that we're actually using for the connection to the AP.
316 */
317 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
318 tracking ? 0 :
319 IEEE80211_CHAN_DISABLED)) {
320 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
321 ret = IEEE80211_STA_DISABLE_HT |
322 IEEE80211_STA_DISABLE_VHT;
323 break;
324 }
325
326 ret |= ieee80211_chandef_downgrade(chandef);
327 }
328
329 if (chandef->width != vht_chandef.width && !tracking)
330 sdata_info(sdata,
331 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
332
333 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
334 return ret;
335 }
336
337 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
338 struct sta_info *sta,
339 const struct ieee80211_ht_cap *ht_cap,
340 const struct ieee80211_ht_operation *ht_oper,
341 const struct ieee80211_vht_operation *vht_oper,
342 const u8 *bssid, u32 *changed)
343 {
344 struct ieee80211_local *local = sdata->local;
345 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
346 struct ieee80211_supported_band *sband;
347 struct ieee80211_channel *chan;
348 struct cfg80211_chan_def chandef;
349 u16 ht_opmode;
350 u32 flags;
351 enum ieee80211_sta_rx_bandwidth new_sta_bw;
352 int ret;
353
354 /* if HT was/is disabled, don't track any bandwidth changes */
355 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
356 return 0;
357
358 /* don't check VHT if we associated as non-VHT station */
359 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
360 vht_oper = NULL;
361
362 if (WARN_ON_ONCE(!sta))
363 return -EINVAL;
364
365 /*
366 * if bss configuration changed store the new one -
367 * this may be applicable even if channel is identical
368 */
369 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
370 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
371 *changed |= BSS_CHANGED_HT;
372 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
373 }
374
375 chan = sdata->vif.bss_conf.chandef.chan;
376 sband = local->hw.wiphy->bands[chan->band];
377
378 /* calculate new channel (type) based on HT/VHT operation IEs */
379 flags = ieee80211_determine_chantype(sdata, sband, chan,
380 ht_cap, ht_oper, vht_oper,
381 &chandef, true);
382
383 /*
384 * Downgrade the new channel if we associated with restricted
385 * capabilities. For example, if we associated as a 20 MHz STA
386 * to a 40 MHz AP (due to regulatory, capabilities or config
387 * reasons) then switching to a 40 MHz channel now won't do us
388 * any good -- we couldn't use it with the AP.
389 */
390 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
391 chandef.width == NL80211_CHAN_WIDTH_80P80)
392 flags |= ieee80211_chandef_downgrade(&chandef);
393 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
394 chandef.width == NL80211_CHAN_WIDTH_160)
395 flags |= ieee80211_chandef_downgrade(&chandef);
396 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
397 chandef.width > NL80211_CHAN_WIDTH_20)
398 flags |= ieee80211_chandef_downgrade(&chandef);
399
400 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
401 return 0;
402
403 sdata_info(sdata,
404 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
405 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
406 chandef.center_freq1, chandef.center_freq2);
407
408 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
409 IEEE80211_STA_DISABLE_VHT |
410 IEEE80211_STA_DISABLE_40MHZ |
411 IEEE80211_STA_DISABLE_80P80MHZ |
412 IEEE80211_STA_DISABLE_160MHZ)) ||
413 !cfg80211_chandef_valid(&chandef)) {
414 sdata_info(sdata,
415 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
416 ifmgd->bssid);
417 return -EINVAL;
418 }
419
420 switch (chandef.width) {
421 case NL80211_CHAN_WIDTH_20_NOHT:
422 case NL80211_CHAN_WIDTH_20:
423 new_sta_bw = IEEE80211_STA_RX_BW_20;
424 break;
425 case NL80211_CHAN_WIDTH_40:
426 new_sta_bw = IEEE80211_STA_RX_BW_40;
427 break;
428 case NL80211_CHAN_WIDTH_80:
429 new_sta_bw = IEEE80211_STA_RX_BW_80;
430 break;
431 case NL80211_CHAN_WIDTH_80P80:
432 case NL80211_CHAN_WIDTH_160:
433 new_sta_bw = IEEE80211_STA_RX_BW_160;
434 break;
435 default:
436 return -EINVAL;
437 }
438
439 if (new_sta_bw > sta->cur_max_bandwidth)
440 new_sta_bw = sta->cur_max_bandwidth;
441
442 if (new_sta_bw < sta->sta.bandwidth) {
443 sta->sta.bandwidth = new_sta_bw;
444 rate_control_rate_update(local, sband, sta,
445 IEEE80211_RC_BW_CHANGED);
446 }
447
448 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
449 if (ret) {
450 sdata_info(sdata,
451 "AP %pM changed bandwidth to incompatible one - disconnect\n",
452 ifmgd->bssid);
453 return ret;
454 }
455
456 if (new_sta_bw > sta->sta.bandwidth) {
457 sta->sta.bandwidth = new_sta_bw;
458 rate_control_rate_update(local, sband, sta,
459 IEEE80211_RC_BW_CHANGED);
460 }
461
462 return 0;
463 }
464
465 /* frame sending functions */
466
467 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
468 struct sk_buff *skb, u8 ap_ht_param,
469 struct ieee80211_supported_band *sband,
470 struct ieee80211_channel *channel,
471 enum ieee80211_smps_mode smps)
472 {
473 u8 *pos;
474 u32 flags = channel->flags;
475 u16 cap;
476 struct ieee80211_sta_ht_cap ht_cap;
477
478 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
479
480 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
481 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
482
483 /* determine capability flags */
484 cap = ht_cap.cap;
485
486 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
487 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
488 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
489 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
490 cap &= ~IEEE80211_HT_CAP_SGI_40;
491 }
492 break;
493 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
494 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
495 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
496 cap &= ~IEEE80211_HT_CAP_SGI_40;
497 }
498 break;
499 }
500
501 /*
502 * If 40 MHz was disabled associate as though we weren't
503 * capable of 40 MHz -- some broken APs will never fall
504 * back to trying to transmit in 20 MHz.
505 */
506 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
507 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
508 cap &= ~IEEE80211_HT_CAP_SGI_40;
509 }
510
511 /* set SM PS mode properly */
512 cap &= ~IEEE80211_HT_CAP_SM_PS;
513 switch (smps) {
514 case IEEE80211_SMPS_AUTOMATIC:
515 case IEEE80211_SMPS_NUM_MODES:
516 WARN_ON(1);
517 case IEEE80211_SMPS_OFF:
518 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
519 IEEE80211_HT_CAP_SM_PS_SHIFT;
520 break;
521 case IEEE80211_SMPS_STATIC:
522 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
523 IEEE80211_HT_CAP_SM_PS_SHIFT;
524 break;
525 case IEEE80211_SMPS_DYNAMIC:
526 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
527 IEEE80211_HT_CAP_SM_PS_SHIFT;
528 break;
529 }
530
531 /* reserve and fill IE */
532 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
533 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
534 }
535
536 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
537 struct sk_buff *skb,
538 struct ieee80211_supported_band *sband,
539 struct ieee80211_vht_cap *ap_vht_cap)
540 {
541 u8 *pos;
542 u32 cap;
543 struct ieee80211_sta_vht_cap vht_cap;
544 u32 mask, ap_bf_sts, our_bf_sts;
545
546 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
547
548 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
549 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
550
551 /* determine capability flags */
552 cap = vht_cap.cap;
553
554 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
555 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
556
557 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
558 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
559 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
560 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
561 }
562
563 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
564 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
565 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
566 }
567
568 /*
569 * Some APs apparently get confused if our capabilities are better
570 * than theirs, so restrict what we advertise in the assoc request.
571 */
572 if (!(ap_vht_cap->vht_cap_info &
573 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
574 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
575
576 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
577
578 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
579 our_bf_sts = cap & mask;
580
581 if (ap_bf_sts < our_bf_sts) {
582 cap &= ~mask;
583 cap |= ap_bf_sts;
584 }
585
586 /* reserve and fill IE */
587 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
588 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
589 }
590
591 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
592 {
593 struct ieee80211_local *local = sdata->local;
594 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
595 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
596 struct sk_buff *skb;
597 struct ieee80211_mgmt *mgmt;
598 u8 *pos, qos_info;
599 size_t offset = 0, noffset;
600 int i, count, rates_len, supp_rates_len, shift;
601 u16 capab;
602 struct ieee80211_supported_band *sband;
603 struct ieee80211_chanctx_conf *chanctx_conf;
604 struct ieee80211_channel *chan;
605 u32 rate_flags, rates = 0;
606
607 sdata_assert_lock(sdata);
608
609 rcu_read_lock();
610 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
611 if (WARN_ON(!chanctx_conf)) {
612 rcu_read_unlock();
613 return;
614 }
615 chan = chanctx_conf->def.chan;
616 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
617 rcu_read_unlock();
618 sband = local->hw.wiphy->bands[chan->band];
619 shift = ieee80211_vif_get_shift(&sdata->vif);
620
621 if (assoc_data->supp_rates_len) {
622 /*
623 * Get all rates supported by the device and the AP as
624 * some APs don't like getting a superset of their rates
625 * in the association request (e.g. D-Link DAP 1353 in
626 * b-only mode)...
627 */
628 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
629 assoc_data->supp_rates,
630 assoc_data->supp_rates_len,
631 &rates);
632 } else {
633 /*
634 * In case AP not provide any supported rates information
635 * before association, we send information element(s) with
636 * all rates that we support.
637 */
638 rates_len = 0;
639 for (i = 0; i < sband->n_bitrates; i++) {
640 if ((rate_flags & sband->bitrates[i].flags)
641 != rate_flags)
642 continue;
643 rates |= BIT(i);
644 rates_len++;
645 }
646 }
647
648 skb = alloc_skb(local->hw.extra_tx_headroom +
649 sizeof(*mgmt) + /* bit too much but doesn't matter */
650 2 + assoc_data->ssid_len + /* SSID */
651 4 + rates_len + /* (extended) rates */
652 4 + /* power capability */
653 2 + 2 * sband->n_channels + /* supported channels */
654 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
655 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
656 assoc_data->ie_len + /* extra IEs */
657 9, /* WMM */
658 GFP_KERNEL);
659 if (!skb)
660 return;
661
662 skb_reserve(skb, local->hw.extra_tx_headroom);
663
664 capab = WLAN_CAPABILITY_ESS;
665
666 if (sband->band == IEEE80211_BAND_2GHZ) {
667 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
668 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
669 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
670 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
671 }
672
673 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
674 capab |= WLAN_CAPABILITY_PRIVACY;
675
676 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
677 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
678 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
679
680 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
681 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
682
683 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
684 memset(mgmt, 0, 24);
685 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
686 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
687 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
688
689 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
690 skb_put(skb, 10);
691 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
692 IEEE80211_STYPE_REASSOC_REQ);
693 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
694 mgmt->u.reassoc_req.listen_interval =
695 cpu_to_le16(local->hw.conf.listen_interval);
696 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
697 ETH_ALEN);
698 } else {
699 skb_put(skb, 4);
700 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
701 IEEE80211_STYPE_ASSOC_REQ);
702 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
703 mgmt->u.assoc_req.listen_interval =
704 cpu_to_le16(local->hw.conf.listen_interval);
705 }
706
707 /* SSID */
708 pos = skb_put(skb, 2 + assoc_data->ssid_len);
709 *pos++ = WLAN_EID_SSID;
710 *pos++ = assoc_data->ssid_len;
711 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
712
713 /* add all rates which were marked to be used above */
714 supp_rates_len = rates_len;
715 if (supp_rates_len > 8)
716 supp_rates_len = 8;
717
718 pos = skb_put(skb, supp_rates_len + 2);
719 *pos++ = WLAN_EID_SUPP_RATES;
720 *pos++ = supp_rates_len;
721
722 count = 0;
723 for (i = 0; i < sband->n_bitrates; i++) {
724 if (BIT(i) & rates) {
725 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
726 5 * (1 << shift));
727 *pos++ = (u8) rate;
728 if (++count == 8)
729 break;
730 }
731 }
732
733 if (rates_len > count) {
734 pos = skb_put(skb, rates_len - count + 2);
735 *pos++ = WLAN_EID_EXT_SUPP_RATES;
736 *pos++ = rates_len - count;
737
738 for (i++; i < sband->n_bitrates; i++) {
739 if (BIT(i) & rates) {
740 int rate;
741 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
742 5 * (1 << shift));
743 *pos++ = (u8) rate;
744 }
745 }
746 }
747
748 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
749 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
750 pos = skb_put(skb, 4);
751 *pos++ = WLAN_EID_PWR_CAPABILITY;
752 *pos++ = 2;
753 *pos++ = 0; /* min tx power */
754 /* max tx power */
755 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
756 }
757
758 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
759 /* TODO: get this in reg domain format */
760 pos = skb_put(skb, 2 * sband->n_channels + 2);
761 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
762 *pos++ = 2 * sband->n_channels;
763 for (i = 0; i < sband->n_channels; i++) {
764 *pos++ = ieee80211_frequency_to_channel(
765 sband->channels[i].center_freq);
766 *pos++ = 1; /* one channel in the subband*/
767 }
768 }
769
770 /* if present, add any custom IEs that go before HT */
771 if (assoc_data->ie_len) {
772 static const u8 before_ht[] = {
773 WLAN_EID_SSID,
774 WLAN_EID_SUPP_RATES,
775 WLAN_EID_EXT_SUPP_RATES,
776 WLAN_EID_PWR_CAPABILITY,
777 WLAN_EID_SUPPORTED_CHANNELS,
778 WLAN_EID_RSN,
779 WLAN_EID_QOS_CAPA,
780 WLAN_EID_RRM_ENABLED_CAPABILITIES,
781 WLAN_EID_MOBILITY_DOMAIN,
782 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
783 WLAN_EID_RIC_DATA, /* reassoc only */
784 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
785 };
786 static const u8 after_ric[] = {
787 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
788 WLAN_EID_HT_CAPABILITY,
789 WLAN_EID_BSS_COEX_2040,
790 WLAN_EID_EXT_CAPABILITY,
791 WLAN_EID_QOS_TRAFFIC_CAPA,
792 WLAN_EID_TIM_BCAST_REQ,
793 WLAN_EID_INTERWORKING,
794 /* 60GHz doesn't happen right now */
795 WLAN_EID_VHT_CAPABILITY,
796 WLAN_EID_OPMODE_NOTIF,
797 };
798
799 noffset = ieee80211_ie_split_ric(assoc_data->ie,
800 assoc_data->ie_len,
801 before_ht,
802 ARRAY_SIZE(before_ht),
803 after_ric,
804 ARRAY_SIZE(after_ric),
805 offset);
806 pos = skb_put(skb, noffset - offset);
807 memcpy(pos, assoc_data->ie + offset, noffset - offset);
808 offset = noffset;
809 }
810
811 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
812 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
813 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
814
815 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
816 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
817 sband, chan, sdata->smps_mode);
818
819 /* if present, add any custom IEs that go before VHT */
820 if (assoc_data->ie_len) {
821 static const u8 before_vht[] = {
822 WLAN_EID_SSID,
823 WLAN_EID_SUPP_RATES,
824 WLAN_EID_EXT_SUPP_RATES,
825 WLAN_EID_PWR_CAPABILITY,
826 WLAN_EID_SUPPORTED_CHANNELS,
827 WLAN_EID_RSN,
828 WLAN_EID_QOS_CAPA,
829 WLAN_EID_RRM_ENABLED_CAPABILITIES,
830 WLAN_EID_MOBILITY_DOMAIN,
831 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
832 WLAN_EID_HT_CAPABILITY,
833 WLAN_EID_BSS_COEX_2040,
834 WLAN_EID_EXT_CAPABILITY,
835 WLAN_EID_QOS_TRAFFIC_CAPA,
836 WLAN_EID_TIM_BCAST_REQ,
837 WLAN_EID_INTERWORKING,
838 };
839
840 /* RIC already taken above, so no need to handle here anymore */
841 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
842 before_vht, ARRAY_SIZE(before_vht),
843 offset);
844 pos = skb_put(skb, noffset - offset);
845 memcpy(pos, assoc_data->ie + offset, noffset - offset);
846 offset = noffset;
847 }
848
849 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
850 ieee80211_add_vht_ie(sdata, skb, sband,
851 &assoc_data->ap_vht_cap);
852
853 /* if present, add any custom non-vendor IEs that go after HT */
854 if (assoc_data->ie_len) {
855 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
856 assoc_data->ie_len,
857 offset);
858 pos = skb_put(skb, noffset - offset);
859 memcpy(pos, assoc_data->ie + offset, noffset - offset);
860 offset = noffset;
861 }
862
863 if (assoc_data->wmm) {
864 if (assoc_data->uapsd) {
865 qos_info = ifmgd->uapsd_queues;
866 qos_info |= (ifmgd->uapsd_max_sp_len <<
867 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
868 } else {
869 qos_info = 0;
870 }
871
872 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
873 }
874
875 /* add any remaining custom (i.e. vendor specific here) IEs */
876 if (assoc_data->ie_len) {
877 noffset = assoc_data->ie_len;
878 pos = skb_put(skb, noffset - offset);
879 memcpy(pos, assoc_data->ie + offset, noffset - offset);
880 }
881
882 drv_mgd_prepare_tx(local, sdata);
883
884 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
885 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
886 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
887 IEEE80211_TX_INTFL_MLME_CONN_TX;
888 ieee80211_tx_skb(sdata, skb);
889 }
890
891 void ieee80211_send_pspoll(struct ieee80211_local *local,
892 struct ieee80211_sub_if_data *sdata)
893 {
894 struct ieee80211_pspoll *pspoll;
895 struct sk_buff *skb;
896
897 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
898 if (!skb)
899 return;
900
901 pspoll = (struct ieee80211_pspoll *) skb->data;
902 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
903
904 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
905 ieee80211_tx_skb(sdata, skb);
906 }
907
908 void ieee80211_send_nullfunc(struct ieee80211_local *local,
909 struct ieee80211_sub_if_data *sdata,
910 int powersave)
911 {
912 struct sk_buff *skb;
913 struct ieee80211_hdr_3addr *nullfunc;
914 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
915
916 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
917 if (!skb)
918 return;
919
920 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
921 if (powersave)
922 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
923
924 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
925 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
926
927 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
928 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
929
930 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
931 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
932
933 ieee80211_tx_skb(sdata, skb);
934 }
935
936 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
937 struct ieee80211_sub_if_data *sdata)
938 {
939 struct sk_buff *skb;
940 struct ieee80211_hdr *nullfunc;
941 __le16 fc;
942
943 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
944 return;
945
946 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
947 if (!skb)
948 return;
949
950 skb_reserve(skb, local->hw.extra_tx_headroom);
951
952 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
953 memset(nullfunc, 0, 30);
954 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
955 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
956 nullfunc->frame_control = fc;
957 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
958 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
959 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
960 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
961
962 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
963 ieee80211_tx_skb(sdata, skb);
964 }
965
966 /* spectrum management related things */
967 static void ieee80211_chswitch_work(struct work_struct *work)
968 {
969 struct ieee80211_sub_if_data *sdata =
970 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
971 struct ieee80211_local *local = sdata->local;
972 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
973 int ret;
974
975 if (!ieee80211_sdata_running(sdata))
976 return;
977
978 sdata_lock(sdata);
979 mutex_lock(&local->mtx);
980 mutex_lock(&local->chanctx_mtx);
981
982 if (!ifmgd->associated)
983 goto out;
984
985 if (!sdata->vif.csa_active)
986 goto out;
987
988 /*
989 * using reservation isn't immediate as it may be deferred until later
990 * with multi-vif. once reservation is complete it will re-schedule the
991 * work with no reserved_chanctx so verify chandef to check if it
992 * completed successfully
993 */
994
995 if (sdata->reserved_chanctx) {
996 /*
997 * with multi-vif csa driver may call ieee80211_csa_finish()
998 * many times while waiting for other interfaces to use their
999 * reservations
1000 */
1001 if (sdata->reserved_ready)
1002 goto out;
1003
1004 ret = ieee80211_vif_use_reserved_context(sdata);
1005 if (ret) {
1006 sdata_info(sdata,
1007 "failed to use reserved channel context, disconnecting (err=%d)\n",
1008 ret);
1009 ieee80211_queue_work(&sdata->local->hw,
1010 &ifmgd->csa_connection_drop_work);
1011 goto out;
1012 }
1013
1014 goto out;
1015 }
1016
1017 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1018 &sdata->csa_chandef)) {
1019 sdata_info(sdata,
1020 "failed to finalize channel switch, disconnecting\n");
1021 ieee80211_queue_work(&sdata->local->hw,
1022 &ifmgd->csa_connection_drop_work);
1023 goto out;
1024 }
1025
1026 /* XXX: shouldn't really modify cfg80211-owned data! */
1027 ifmgd->associated->channel = sdata->csa_chandef.chan;
1028
1029 ifmgd->csa_waiting_bcn = true;
1030
1031 ieee80211_sta_reset_beacon_monitor(sdata);
1032 ieee80211_sta_reset_conn_monitor(sdata);
1033
1034 out:
1035 mutex_unlock(&local->chanctx_mtx);
1036 mutex_unlock(&local->mtx);
1037 sdata_unlock(sdata);
1038 }
1039
1040 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1041 {
1042 struct ieee80211_local *local = sdata->local;
1043 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1044 int ret;
1045
1046 sdata_assert_lock(sdata);
1047
1048 WARN_ON(!sdata->vif.csa_active);
1049
1050 if (sdata->csa_block_tx) {
1051 ieee80211_wake_vif_queues(local, sdata,
1052 IEEE80211_QUEUE_STOP_REASON_CSA);
1053 sdata->csa_block_tx = false;
1054 }
1055
1056 sdata->vif.csa_active = false;
1057 ifmgd->csa_waiting_bcn = false;
1058
1059 ret = drv_post_channel_switch(sdata);
1060 if (ret) {
1061 sdata_info(sdata,
1062 "driver post channel switch failed, disconnecting\n");
1063 ieee80211_queue_work(&local->hw,
1064 &ifmgd->csa_connection_drop_work);
1065 return;
1066 }
1067
1068 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1069 }
1070
1071 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1072 {
1073 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1074 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1075
1076 trace_api_chswitch_done(sdata, success);
1077 if (!success) {
1078 sdata_info(sdata,
1079 "driver channel switch failed, disconnecting\n");
1080 ieee80211_queue_work(&sdata->local->hw,
1081 &ifmgd->csa_connection_drop_work);
1082 } else {
1083 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1084 }
1085 }
1086 EXPORT_SYMBOL(ieee80211_chswitch_done);
1087
1088 static void ieee80211_chswitch_timer(unsigned long data)
1089 {
1090 struct ieee80211_sub_if_data *sdata =
1091 (struct ieee80211_sub_if_data *) data;
1092
1093 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1094 }
1095
1096 static void
1097 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1098 u64 timestamp, u32 device_timestamp,
1099 struct ieee802_11_elems *elems,
1100 bool beacon)
1101 {
1102 struct ieee80211_local *local = sdata->local;
1103 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1104 struct cfg80211_bss *cbss = ifmgd->associated;
1105 struct ieee80211_chanctx_conf *conf;
1106 struct ieee80211_chanctx *chanctx;
1107 enum ieee80211_band current_band;
1108 struct ieee80211_csa_ie csa_ie;
1109 struct ieee80211_channel_switch ch_switch;
1110 int res;
1111
1112 sdata_assert_lock(sdata);
1113
1114 if (!cbss)
1115 return;
1116
1117 if (local->scanning)
1118 return;
1119
1120 /* disregard subsequent announcements if we are already processing */
1121 if (sdata->vif.csa_active)
1122 return;
1123
1124 current_band = cbss->channel->band;
1125 memset(&csa_ie, 0, sizeof(csa_ie));
1126 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1127 ifmgd->flags,
1128 ifmgd->associated->bssid, &csa_ie);
1129 if (res < 0)
1130 ieee80211_queue_work(&local->hw,
1131 &ifmgd->csa_connection_drop_work);
1132 if (res)
1133 return;
1134
1135 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1136 IEEE80211_CHAN_DISABLED)) {
1137 sdata_info(sdata,
1138 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1139 ifmgd->associated->bssid,
1140 csa_ie.chandef.chan->center_freq,
1141 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1142 csa_ie.chandef.center_freq2);
1143 ieee80211_queue_work(&local->hw,
1144 &ifmgd->csa_connection_drop_work);
1145 return;
1146 }
1147
1148 mutex_lock(&local->mtx);
1149 mutex_lock(&local->chanctx_mtx);
1150 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1151 lockdep_is_held(&local->chanctx_mtx));
1152 if (!conf) {
1153 sdata_info(sdata,
1154 "no channel context assigned to vif?, disconnecting\n");
1155 ieee80211_queue_work(&local->hw,
1156 &ifmgd->csa_connection_drop_work);
1157 mutex_unlock(&local->chanctx_mtx);
1158 mutex_unlock(&local->mtx);
1159 return;
1160 }
1161
1162 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1163
1164 if (local->use_chanctx &&
1165 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1166 sdata_info(sdata,
1167 "driver doesn't support chan-switch with channel contexts\n");
1168 ieee80211_queue_work(&local->hw,
1169 &ifmgd->csa_connection_drop_work);
1170 mutex_unlock(&local->chanctx_mtx);
1171 mutex_unlock(&local->mtx);
1172 return;
1173 }
1174
1175 ch_switch.timestamp = timestamp;
1176 ch_switch.device_timestamp = device_timestamp;
1177 ch_switch.block_tx = csa_ie.mode;
1178 ch_switch.chandef = csa_ie.chandef;
1179 ch_switch.count = csa_ie.count;
1180
1181 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1182 sdata_info(sdata,
1183 "preparing for channel switch failed, disconnecting\n");
1184 ieee80211_queue_work(&local->hw,
1185 &ifmgd->csa_connection_drop_work);
1186 mutex_unlock(&local->chanctx_mtx);
1187 mutex_unlock(&local->mtx);
1188 return;
1189 }
1190
1191 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1192 chanctx->mode, false);
1193 if (res) {
1194 sdata_info(sdata,
1195 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1196 res);
1197 ieee80211_queue_work(&local->hw,
1198 &ifmgd->csa_connection_drop_work);
1199 mutex_unlock(&local->chanctx_mtx);
1200 mutex_unlock(&local->mtx);
1201 return;
1202 }
1203 mutex_unlock(&local->chanctx_mtx);
1204
1205 sdata->vif.csa_active = true;
1206 sdata->csa_chandef = csa_ie.chandef;
1207 sdata->csa_block_tx = csa_ie.mode;
1208
1209 if (sdata->csa_block_tx)
1210 ieee80211_stop_vif_queues(local, sdata,
1211 IEEE80211_QUEUE_STOP_REASON_CSA);
1212 mutex_unlock(&local->mtx);
1213
1214 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1215 csa_ie.count);
1216
1217 if (local->ops->channel_switch) {
1218 /* use driver's channel switch callback */
1219 drv_channel_switch(local, sdata, &ch_switch);
1220 return;
1221 }
1222
1223 /* channel switch handled in software */
1224 if (csa_ie.count <= 1)
1225 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1226 else
1227 mod_timer(&ifmgd->chswitch_timer,
1228 TU_TO_EXP_TIME((csa_ie.count - 1) *
1229 cbss->beacon_interval));
1230 }
1231
1232 static bool
1233 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1234 struct ieee80211_channel *channel,
1235 const u8 *country_ie, u8 country_ie_len,
1236 const u8 *pwr_constr_elem,
1237 int *chan_pwr, int *pwr_reduction)
1238 {
1239 struct ieee80211_country_ie_triplet *triplet;
1240 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1241 int i, chan_increment;
1242 bool have_chan_pwr = false;
1243
1244 /* Invalid IE */
1245 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1246 return false;
1247
1248 triplet = (void *)(country_ie + 3);
1249 country_ie_len -= 3;
1250
1251 switch (channel->band) {
1252 default:
1253 WARN_ON_ONCE(1);
1254 /* fall through */
1255 case IEEE80211_BAND_2GHZ:
1256 case IEEE80211_BAND_60GHZ:
1257 chan_increment = 1;
1258 break;
1259 case IEEE80211_BAND_5GHZ:
1260 chan_increment = 4;
1261 break;
1262 }
1263
1264 /* find channel */
1265 while (country_ie_len >= 3) {
1266 u8 first_channel = triplet->chans.first_channel;
1267
1268 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1269 goto next;
1270
1271 for (i = 0; i < triplet->chans.num_channels; i++) {
1272 if (first_channel + i * chan_increment == chan) {
1273 have_chan_pwr = true;
1274 *chan_pwr = triplet->chans.max_power;
1275 break;
1276 }
1277 }
1278 if (have_chan_pwr)
1279 break;
1280
1281 next:
1282 triplet++;
1283 country_ie_len -= 3;
1284 }
1285
1286 if (have_chan_pwr)
1287 *pwr_reduction = *pwr_constr_elem;
1288 return have_chan_pwr;
1289 }
1290
1291 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1292 struct ieee80211_channel *channel,
1293 const u8 *cisco_dtpc_ie,
1294 int *pwr_level)
1295 {
1296 /* From practical testing, the first data byte of the DTPC element
1297 * seems to contain the requested dBm level, and the CLI on Cisco
1298 * APs clearly state the range is -127 to 127 dBm, which indicates
1299 * a signed byte, although it seemingly never actually goes negative.
1300 * The other byte seems to always be zero.
1301 */
1302 *pwr_level = (__s8)cisco_dtpc_ie[4];
1303 }
1304
1305 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1306 struct ieee80211_channel *channel,
1307 struct ieee80211_mgmt *mgmt,
1308 const u8 *country_ie, u8 country_ie_len,
1309 const u8 *pwr_constr_ie,
1310 const u8 *cisco_dtpc_ie)
1311 {
1312 bool has_80211h_pwr = false, has_cisco_pwr = false;
1313 int chan_pwr = 0, pwr_reduction_80211h = 0;
1314 int pwr_level_cisco, pwr_level_80211h;
1315 int new_ap_level;
1316
1317 if (country_ie && pwr_constr_ie &&
1318 mgmt->u.probe_resp.capab_info &
1319 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT)) {
1320 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1321 sdata, channel, country_ie, country_ie_len,
1322 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1323 pwr_level_80211h =
1324 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1325 }
1326
1327 if (cisco_dtpc_ie) {
1328 ieee80211_find_cisco_dtpc(
1329 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1330 has_cisco_pwr = true;
1331 }
1332
1333 if (!has_80211h_pwr && !has_cisco_pwr)
1334 return 0;
1335
1336 /* If we have both 802.11h and Cisco DTPC, apply both limits
1337 * by picking the smallest of the two power levels advertised.
1338 */
1339 if (has_80211h_pwr &&
1340 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1341 sdata_info(sdata,
1342 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1343 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1344 sdata->u.mgd.bssid);
1345 new_ap_level = pwr_level_80211h;
1346 } else { /* has_cisco_pwr is always true here. */
1347 sdata_info(sdata,
1348 "Limiting TX power to %d dBm as advertised by %pM\n",
1349 pwr_level_cisco, sdata->u.mgd.bssid);
1350 new_ap_level = pwr_level_cisco;
1351 }
1352
1353 if (sdata->ap_power_level == new_ap_level)
1354 return 0;
1355
1356 sdata->ap_power_level = new_ap_level;
1357 if (__ieee80211_recalc_txpower(sdata))
1358 return BSS_CHANGED_TXPOWER;
1359 return 0;
1360 }
1361
1362 /* powersave */
1363 static void ieee80211_enable_ps(struct ieee80211_local *local,
1364 struct ieee80211_sub_if_data *sdata)
1365 {
1366 struct ieee80211_conf *conf = &local->hw.conf;
1367
1368 /*
1369 * If we are scanning right now then the parameters will
1370 * take effect when scan finishes.
1371 */
1372 if (local->scanning)
1373 return;
1374
1375 if (conf->dynamic_ps_timeout > 0 &&
1376 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1377 mod_timer(&local->dynamic_ps_timer, jiffies +
1378 msecs_to_jiffies(conf->dynamic_ps_timeout));
1379 } else {
1380 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1381 ieee80211_send_nullfunc(local, sdata, 1);
1382
1383 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1384 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1385 return;
1386
1387 conf->flags |= IEEE80211_CONF_PS;
1388 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1389 }
1390 }
1391
1392 static void ieee80211_change_ps(struct ieee80211_local *local)
1393 {
1394 struct ieee80211_conf *conf = &local->hw.conf;
1395
1396 if (local->ps_sdata) {
1397 ieee80211_enable_ps(local, local->ps_sdata);
1398 } else if (conf->flags & IEEE80211_CONF_PS) {
1399 conf->flags &= ~IEEE80211_CONF_PS;
1400 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1401 del_timer_sync(&local->dynamic_ps_timer);
1402 cancel_work_sync(&local->dynamic_ps_enable_work);
1403 }
1404 }
1405
1406 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1407 {
1408 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1409 struct sta_info *sta = NULL;
1410 bool authorized = false;
1411
1412 if (!mgd->powersave)
1413 return false;
1414
1415 if (mgd->broken_ap)
1416 return false;
1417
1418 if (!mgd->associated)
1419 return false;
1420
1421 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1422 return false;
1423
1424 if (!mgd->have_beacon)
1425 return false;
1426
1427 rcu_read_lock();
1428 sta = sta_info_get(sdata, mgd->bssid);
1429 if (sta)
1430 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1431 rcu_read_unlock();
1432
1433 return authorized;
1434 }
1435
1436 /* need to hold RTNL or interface lock */
1437 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1438 {
1439 struct ieee80211_sub_if_data *sdata, *found = NULL;
1440 int count = 0;
1441 int timeout;
1442
1443 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1444 local->ps_sdata = NULL;
1445 return;
1446 }
1447
1448 list_for_each_entry(sdata, &local->interfaces, list) {
1449 if (!ieee80211_sdata_running(sdata))
1450 continue;
1451 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1452 /* If an AP vif is found, then disable PS
1453 * by setting the count to zero thereby setting
1454 * ps_sdata to NULL.
1455 */
1456 count = 0;
1457 break;
1458 }
1459 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1460 continue;
1461 found = sdata;
1462 count++;
1463 }
1464
1465 if (count == 1 && ieee80211_powersave_allowed(found)) {
1466 s32 beaconint_us;
1467
1468 if (latency < 0)
1469 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1470
1471 beaconint_us = ieee80211_tu_to_usec(
1472 found->vif.bss_conf.beacon_int);
1473
1474 timeout = local->dynamic_ps_forced_timeout;
1475 if (timeout < 0) {
1476 /*
1477 * Go to full PSM if the user configures a very low
1478 * latency requirement.
1479 * The 2000 second value is there for compatibility
1480 * until the PM_QOS_NETWORK_LATENCY is configured
1481 * with real values.
1482 */
1483 if (latency > (1900 * USEC_PER_MSEC) &&
1484 latency != (2000 * USEC_PER_SEC))
1485 timeout = 0;
1486 else
1487 timeout = 100;
1488 }
1489 local->hw.conf.dynamic_ps_timeout = timeout;
1490
1491 if (beaconint_us > latency) {
1492 local->ps_sdata = NULL;
1493 } else {
1494 int maxslp = 1;
1495 u8 dtimper = found->u.mgd.dtim_period;
1496
1497 /* If the TIM IE is invalid, pretend the value is 1 */
1498 if (!dtimper)
1499 dtimper = 1;
1500 else if (dtimper > 1)
1501 maxslp = min_t(int, dtimper,
1502 latency / beaconint_us);
1503
1504 local->hw.conf.max_sleep_period = maxslp;
1505 local->hw.conf.ps_dtim_period = dtimper;
1506 local->ps_sdata = found;
1507 }
1508 } else {
1509 local->ps_sdata = NULL;
1510 }
1511
1512 ieee80211_change_ps(local);
1513 }
1514
1515 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1516 {
1517 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1518
1519 if (sdata->vif.bss_conf.ps != ps_allowed) {
1520 sdata->vif.bss_conf.ps = ps_allowed;
1521 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1522 }
1523 }
1524
1525 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1526 {
1527 struct ieee80211_local *local =
1528 container_of(work, struct ieee80211_local,
1529 dynamic_ps_disable_work);
1530
1531 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1532 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1533 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1534 }
1535
1536 ieee80211_wake_queues_by_reason(&local->hw,
1537 IEEE80211_MAX_QUEUE_MAP,
1538 IEEE80211_QUEUE_STOP_REASON_PS,
1539 false);
1540 }
1541
1542 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1543 {
1544 struct ieee80211_local *local =
1545 container_of(work, struct ieee80211_local,
1546 dynamic_ps_enable_work);
1547 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1548 struct ieee80211_if_managed *ifmgd;
1549 unsigned long flags;
1550 int q;
1551
1552 /* can only happen when PS was just disabled anyway */
1553 if (!sdata)
1554 return;
1555
1556 ifmgd = &sdata->u.mgd;
1557
1558 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1559 return;
1560
1561 if (local->hw.conf.dynamic_ps_timeout > 0) {
1562 /* don't enter PS if TX frames are pending */
1563 if (drv_tx_frames_pending(local)) {
1564 mod_timer(&local->dynamic_ps_timer, jiffies +
1565 msecs_to_jiffies(
1566 local->hw.conf.dynamic_ps_timeout));
1567 return;
1568 }
1569
1570 /*
1571 * transmission can be stopped by others which leads to
1572 * dynamic_ps_timer expiry. Postpone the ps timer if it
1573 * is not the actual idle state.
1574 */
1575 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1576 for (q = 0; q < local->hw.queues; q++) {
1577 if (local->queue_stop_reasons[q]) {
1578 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1579 flags);
1580 mod_timer(&local->dynamic_ps_timer, jiffies +
1581 msecs_to_jiffies(
1582 local->hw.conf.dynamic_ps_timeout));
1583 return;
1584 }
1585 }
1586 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1587 }
1588
1589 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1590 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1591 if (drv_tx_frames_pending(local)) {
1592 mod_timer(&local->dynamic_ps_timer, jiffies +
1593 msecs_to_jiffies(
1594 local->hw.conf.dynamic_ps_timeout));
1595 } else {
1596 ieee80211_send_nullfunc(local, sdata, 1);
1597 /* Flush to get the tx status of nullfunc frame */
1598 ieee80211_flush_queues(local, sdata);
1599 }
1600 }
1601
1602 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1603 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1604 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1605 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1606 local->hw.conf.flags |= IEEE80211_CONF_PS;
1607 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1608 }
1609 }
1610
1611 void ieee80211_dynamic_ps_timer(unsigned long data)
1612 {
1613 struct ieee80211_local *local = (void *) data;
1614
1615 if (local->quiescing || local->suspended)
1616 return;
1617
1618 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1619 }
1620
1621 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1622 {
1623 struct delayed_work *delayed_work =
1624 container_of(work, struct delayed_work, work);
1625 struct ieee80211_sub_if_data *sdata =
1626 container_of(delayed_work, struct ieee80211_sub_if_data,
1627 dfs_cac_timer_work);
1628 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1629
1630 mutex_lock(&sdata->local->mtx);
1631 if (sdata->wdev.cac_started) {
1632 ieee80211_vif_release_channel(sdata);
1633 cfg80211_cac_event(sdata->dev, &chandef,
1634 NL80211_RADAR_CAC_FINISHED,
1635 GFP_KERNEL);
1636 }
1637 mutex_unlock(&sdata->local->mtx);
1638 }
1639
1640 static bool
1641 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1642 {
1643 struct ieee80211_local *local = sdata->local;
1644 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1645 bool ret;
1646 int ac;
1647
1648 if (local->hw.queues < IEEE80211_NUM_ACS)
1649 return false;
1650
1651 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1652 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1653 int non_acm_ac;
1654 unsigned long now = jiffies;
1655
1656 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1657 tx_tspec->admitted_time &&
1658 time_after(now, tx_tspec->time_slice_start + HZ)) {
1659 tx_tspec->consumed_tx_time = 0;
1660 tx_tspec->time_slice_start = now;
1661
1662 if (tx_tspec->downgraded)
1663 tx_tspec->action =
1664 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1665 }
1666
1667 switch (tx_tspec->action) {
1668 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1669 /* take the original parameters */
1670 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1671 sdata_err(sdata,
1672 "failed to set TX queue parameters for queue %d\n",
1673 ac);
1674 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1675 tx_tspec->downgraded = false;
1676 ret = true;
1677 break;
1678 case TX_TSPEC_ACTION_DOWNGRADE:
1679 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1680 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1681 ret = true;
1682 break;
1683 }
1684 /* downgrade next lower non-ACM AC */
1685 for (non_acm_ac = ac + 1;
1686 non_acm_ac < IEEE80211_NUM_ACS;
1687 non_acm_ac++)
1688 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1689 break;
1690 /* The loop will result in using BK even if it requires
1691 * admission control, such configuration makes no sense
1692 * and we have to transmit somehow - the AC selection
1693 * does the same thing.
1694 */
1695 if (drv_conf_tx(local, sdata, ac,
1696 &sdata->tx_conf[non_acm_ac]))
1697 sdata_err(sdata,
1698 "failed to set TX queue parameters for queue %d\n",
1699 ac);
1700 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1701 ret = true;
1702 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1703 tx_tspec->time_slice_start + HZ - now + 1);
1704 break;
1705 case TX_TSPEC_ACTION_NONE:
1706 /* nothing now */
1707 break;
1708 }
1709 }
1710
1711 return ret;
1712 }
1713
1714 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1715 {
1716 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1717 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1718 }
1719
1720 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1721 {
1722 struct ieee80211_sub_if_data *sdata;
1723
1724 sdata = container_of(work, struct ieee80211_sub_if_data,
1725 u.mgd.tx_tspec_wk.work);
1726 ieee80211_sta_handle_tspec_ac_params(sdata);
1727 }
1728
1729 /* MLME */
1730 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1731 struct ieee80211_sub_if_data *sdata,
1732 const u8 *wmm_param, size_t wmm_param_len)
1733 {
1734 struct ieee80211_tx_queue_params params;
1735 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1736 size_t left;
1737 int count;
1738 const u8 *pos;
1739 u8 uapsd_queues = 0;
1740
1741 if (!local->ops->conf_tx)
1742 return false;
1743
1744 if (local->hw.queues < IEEE80211_NUM_ACS)
1745 return false;
1746
1747 if (!wmm_param)
1748 return false;
1749
1750 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1751 return false;
1752
1753 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1754 uapsd_queues = ifmgd->uapsd_queues;
1755
1756 count = wmm_param[6] & 0x0f;
1757 if (count == ifmgd->wmm_last_param_set)
1758 return false;
1759 ifmgd->wmm_last_param_set = count;
1760
1761 pos = wmm_param + 8;
1762 left = wmm_param_len - 8;
1763
1764 memset(&params, 0, sizeof(params));
1765
1766 sdata->wmm_acm = 0;
1767 for (; left >= 4; left -= 4, pos += 4) {
1768 int aci = (pos[0] >> 5) & 0x03;
1769 int acm = (pos[0] >> 4) & 0x01;
1770 bool uapsd = false;
1771 int queue;
1772
1773 switch (aci) {
1774 case 1: /* AC_BK */
1775 queue = 3;
1776 if (acm)
1777 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1778 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1779 uapsd = true;
1780 break;
1781 case 2: /* AC_VI */
1782 queue = 1;
1783 if (acm)
1784 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1785 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1786 uapsd = true;
1787 break;
1788 case 3: /* AC_VO */
1789 queue = 0;
1790 if (acm)
1791 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1792 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1793 uapsd = true;
1794 break;
1795 case 0: /* AC_BE */
1796 default:
1797 queue = 2;
1798 if (acm)
1799 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1800 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1801 uapsd = true;
1802 break;
1803 }
1804
1805 params.aifs = pos[0] & 0x0f;
1806 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1807 params.cw_min = ecw2cw(pos[1] & 0x0f);
1808 params.txop = get_unaligned_le16(pos + 2);
1809 params.acm = acm;
1810 params.uapsd = uapsd;
1811
1812 mlme_dbg(sdata,
1813 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1814 queue, aci, acm,
1815 params.aifs, params.cw_min, params.cw_max,
1816 params.txop, params.uapsd,
1817 ifmgd->tx_tspec[queue].downgraded);
1818 sdata->tx_conf[queue] = params;
1819 if (!ifmgd->tx_tspec[queue].downgraded &&
1820 drv_conf_tx(local, sdata, queue, &params))
1821 sdata_err(sdata,
1822 "failed to set TX queue parameters for queue %d\n",
1823 queue);
1824 }
1825
1826 /* enable WMM or activate new settings */
1827 sdata->vif.bss_conf.qos = true;
1828 return true;
1829 }
1830
1831 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1832 {
1833 lockdep_assert_held(&sdata->local->mtx);
1834
1835 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1836 ieee80211_run_deferred_scan(sdata->local);
1837 }
1838
1839 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1840 {
1841 mutex_lock(&sdata->local->mtx);
1842 __ieee80211_stop_poll(sdata);
1843 mutex_unlock(&sdata->local->mtx);
1844 }
1845
1846 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1847 u16 capab, bool erp_valid, u8 erp)
1848 {
1849 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1850 u32 changed = 0;
1851 bool use_protection;
1852 bool use_short_preamble;
1853 bool use_short_slot;
1854
1855 if (erp_valid) {
1856 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1857 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1858 } else {
1859 use_protection = false;
1860 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1861 }
1862
1863 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1864 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1865 use_short_slot = true;
1866
1867 if (use_protection != bss_conf->use_cts_prot) {
1868 bss_conf->use_cts_prot = use_protection;
1869 changed |= BSS_CHANGED_ERP_CTS_PROT;
1870 }
1871
1872 if (use_short_preamble != bss_conf->use_short_preamble) {
1873 bss_conf->use_short_preamble = use_short_preamble;
1874 changed |= BSS_CHANGED_ERP_PREAMBLE;
1875 }
1876
1877 if (use_short_slot != bss_conf->use_short_slot) {
1878 bss_conf->use_short_slot = use_short_slot;
1879 changed |= BSS_CHANGED_ERP_SLOT;
1880 }
1881
1882 return changed;
1883 }
1884
1885 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1886 struct cfg80211_bss *cbss,
1887 u32 bss_info_changed)
1888 {
1889 struct ieee80211_bss *bss = (void *)cbss->priv;
1890 struct ieee80211_local *local = sdata->local;
1891 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1892
1893 bss_info_changed |= BSS_CHANGED_ASSOC;
1894 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1895 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1896
1897 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1898 beacon_loss_count * bss_conf->beacon_int));
1899
1900 sdata->u.mgd.associated = cbss;
1901 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1902
1903 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1904
1905 if (sdata->vif.p2p) {
1906 const struct cfg80211_bss_ies *ies;
1907
1908 rcu_read_lock();
1909 ies = rcu_dereference(cbss->ies);
1910 if (ies) {
1911 int ret;
1912
1913 ret = cfg80211_get_p2p_attr(
1914 ies->data, ies->len,
1915 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1916 (u8 *) &bss_conf->p2p_noa_attr,
1917 sizeof(bss_conf->p2p_noa_attr));
1918 if (ret >= 2) {
1919 sdata->u.mgd.p2p_noa_index =
1920 bss_conf->p2p_noa_attr.index;
1921 bss_info_changed |= BSS_CHANGED_P2P_PS;
1922 }
1923 }
1924 rcu_read_unlock();
1925 }
1926
1927 /* just to be sure */
1928 ieee80211_stop_poll(sdata);
1929
1930 ieee80211_led_assoc(local, 1);
1931
1932 if (sdata->u.mgd.have_beacon) {
1933 /*
1934 * If the AP is buggy we may get here with no DTIM period
1935 * known, so assume it's 1 which is the only safe assumption
1936 * in that case, although if the TIM IE is broken powersave
1937 * probably just won't work at all.
1938 */
1939 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1940 bss_conf->beacon_rate = bss->beacon_rate;
1941 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1942 } else {
1943 bss_conf->beacon_rate = NULL;
1944 bss_conf->dtim_period = 0;
1945 }
1946
1947 bss_conf->assoc = 1;
1948
1949 /* Tell the driver to monitor connection quality (if supported) */
1950 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1951 bss_conf->cqm_rssi_thold)
1952 bss_info_changed |= BSS_CHANGED_CQM;
1953
1954 /* Enable ARP filtering */
1955 if (bss_conf->arp_addr_cnt)
1956 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1957
1958 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1959
1960 mutex_lock(&local->iflist_mtx);
1961 ieee80211_recalc_ps(local, -1);
1962 mutex_unlock(&local->iflist_mtx);
1963
1964 ieee80211_recalc_smps(sdata);
1965 ieee80211_recalc_ps_vif(sdata);
1966
1967 netif_carrier_on(sdata->dev);
1968 }
1969
1970 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1971 u16 stype, u16 reason, bool tx,
1972 u8 *frame_buf)
1973 {
1974 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1975 struct ieee80211_local *local = sdata->local;
1976 u32 changed = 0;
1977
1978 sdata_assert_lock(sdata);
1979
1980 if (WARN_ON_ONCE(tx && !frame_buf))
1981 return;
1982
1983 if (WARN_ON(!ifmgd->associated))
1984 return;
1985
1986 ieee80211_stop_poll(sdata);
1987
1988 ifmgd->associated = NULL;
1989 netif_carrier_off(sdata->dev);
1990
1991 /*
1992 * if we want to get out of ps before disassoc (why?) we have
1993 * to do it before sending disassoc, as otherwise the null-packet
1994 * won't be valid.
1995 */
1996 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1997 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1998 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1999 }
2000 local->ps_sdata = NULL;
2001
2002 /* disable per-vif ps */
2003 ieee80211_recalc_ps_vif(sdata);
2004
2005 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
2006 if (tx)
2007 ieee80211_flush_queues(local, sdata);
2008
2009 /* deauthenticate/disassociate now */
2010 if (tx || frame_buf)
2011 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2012 reason, tx, frame_buf);
2013
2014 /* flush out frame */
2015 if (tx)
2016 ieee80211_flush_queues(local, sdata);
2017
2018 /* clear bssid only after building the needed mgmt frames */
2019 memset(ifmgd->bssid, 0, ETH_ALEN);
2020
2021 /* remove AP and TDLS peers */
2022 sta_info_flush(sdata);
2023
2024 /* finally reset all BSS / config parameters */
2025 changed |= ieee80211_reset_erp_info(sdata);
2026
2027 ieee80211_led_assoc(local, 0);
2028 changed |= BSS_CHANGED_ASSOC;
2029 sdata->vif.bss_conf.assoc = false;
2030
2031 ifmgd->p2p_noa_index = -1;
2032 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2033 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2034
2035 /* on the next assoc, re-program HT/VHT parameters */
2036 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2037 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2038 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2039 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2040
2041 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2042
2043 del_timer_sync(&local->dynamic_ps_timer);
2044 cancel_work_sync(&local->dynamic_ps_enable_work);
2045
2046 /* Disable ARP filtering */
2047 if (sdata->vif.bss_conf.arp_addr_cnt)
2048 changed |= BSS_CHANGED_ARP_FILTER;
2049
2050 sdata->vif.bss_conf.qos = false;
2051 changed |= BSS_CHANGED_QOS;
2052
2053 /* The BSSID (not really interesting) and HT changed */
2054 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2055 ieee80211_bss_info_change_notify(sdata, changed);
2056
2057 /* disassociated - set to defaults now */
2058 ieee80211_set_wmm_default(sdata, false);
2059
2060 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2061 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2062 del_timer_sync(&sdata->u.mgd.timer);
2063 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2064
2065 sdata->vif.bss_conf.dtim_period = 0;
2066 sdata->vif.bss_conf.beacon_rate = NULL;
2067
2068 ifmgd->have_beacon = false;
2069
2070 ifmgd->flags = 0;
2071 mutex_lock(&local->mtx);
2072 ieee80211_vif_release_channel(sdata);
2073
2074 sdata->vif.csa_active = false;
2075 ifmgd->csa_waiting_bcn = false;
2076 if (sdata->csa_block_tx) {
2077 ieee80211_wake_vif_queues(local, sdata,
2078 IEEE80211_QUEUE_STOP_REASON_CSA);
2079 sdata->csa_block_tx = false;
2080 }
2081 mutex_unlock(&local->mtx);
2082
2083 /* existing TX TSPEC sessions no longer exist */
2084 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2085 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2086
2087 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2088 }
2089
2090 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2091 struct ieee80211_hdr *hdr)
2092 {
2093 /*
2094 * We can postpone the mgd.timer whenever receiving unicast frames
2095 * from AP because we know that the connection is working both ways
2096 * at that time. But multicast frames (and hence also beacons) must
2097 * be ignored here, because we need to trigger the timer during
2098 * data idle periods for sending the periodic probe request to the
2099 * AP we're connected to.
2100 */
2101 if (is_multicast_ether_addr(hdr->addr1))
2102 return;
2103
2104 ieee80211_sta_reset_conn_monitor(sdata);
2105 }
2106
2107 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2108 {
2109 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2110 struct ieee80211_local *local = sdata->local;
2111
2112 mutex_lock(&local->mtx);
2113 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2114 goto out;
2115
2116 __ieee80211_stop_poll(sdata);
2117
2118 mutex_lock(&local->iflist_mtx);
2119 ieee80211_recalc_ps(local, -1);
2120 mutex_unlock(&local->iflist_mtx);
2121
2122 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
2123 goto out;
2124
2125 /*
2126 * We've received a probe response, but are not sure whether
2127 * we have or will be receiving any beacons or data, so let's
2128 * schedule the timers again, just in case.
2129 */
2130 ieee80211_sta_reset_beacon_monitor(sdata);
2131
2132 mod_timer(&ifmgd->conn_mon_timer,
2133 round_jiffies_up(jiffies +
2134 IEEE80211_CONNECTION_IDLE_TIME));
2135 out:
2136 mutex_unlock(&local->mtx);
2137 }
2138
2139 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2140 struct ieee80211_hdr *hdr,
2141 u16 tx_time)
2142 {
2143 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2144 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2145 int ac = ieee80211_ac_from_tid(tid);
2146 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2147 unsigned long now = jiffies;
2148
2149 if (likely(!tx_tspec->admitted_time))
2150 return;
2151
2152 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2153 tx_tspec->consumed_tx_time = 0;
2154 tx_tspec->time_slice_start = now;
2155
2156 if (tx_tspec->downgraded) {
2157 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2158 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2159 }
2160 }
2161
2162 if (tx_tspec->downgraded)
2163 return;
2164
2165 tx_tspec->consumed_tx_time += tx_time;
2166
2167 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2168 tx_tspec->downgraded = true;
2169 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2170 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2171 }
2172 }
2173
2174 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2175 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2176 {
2177 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2178
2179 if (!ieee80211_is_data(hdr->frame_control))
2180 return;
2181
2182 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2183 sdata->u.mgd.probe_send_count > 0) {
2184 if (ack)
2185 ieee80211_sta_reset_conn_monitor(sdata);
2186 else
2187 sdata->u.mgd.nullfunc_failed = true;
2188 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2189 return;
2190 }
2191
2192 if (ack)
2193 ieee80211_sta_reset_conn_monitor(sdata);
2194 }
2195
2196 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2197 {
2198 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2199 const u8 *ssid;
2200 u8 *dst = ifmgd->associated->bssid;
2201 u8 unicast_limit = max(1, max_probe_tries - 3);
2202
2203 /*
2204 * Try sending broadcast probe requests for the last three
2205 * probe requests after the first ones failed since some
2206 * buggy APs only support broadcast probe requests.
2207 */
2208 if (ifmgd->probe_send_count >= unicast_limit)
2209 dst = NULL;
2210
2211 /*
2212 * When the hardware reports an accurate Tx ACK status, it's
2213 * better to send a nullfunc frame instead of a probe request,
2214 * as it will kick us off the AP quickly if we aren't associated
2215 * anymore. The timeout will be reset if the frame is ACKed by
2216 * the AP.
2217 */
2218 ifmgd->probe_send_count++;
2219
2220 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2221 ifmgd->nullfunc_failed = false;
2222 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2223 } else {
2224 int ssid_len;
2225
2226 rcu_read_lock();
2227 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2228 if (WARN_ON_ONCE(ssid == NULL))
2229 ssid_len = 0;
2230 else
2231 ssid_len = ssid[1];
2232
2233 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
2234 ssid + 2, ssid_len, NULL,
2235 0, (u32) -1, true, 0,
2236 ifmgd->associated->channel, false);
2237 rcu_read_unlock();
2238 }
2239
2240 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2241 run_again(sdata, ifmgd->probe_timeout);
2242 }
2243
2244 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2245 bool beacon)
2246 {
2247 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2248 bool already = false;
2249
2250 if (!ieee80211_sdata_running(sdata))
2251 return;
2252
2253 sdata_lock(sdata);
2254
2255 if (!ifmgd->associated)
2256 goto out;
2257
2258 mutex_lock(&sdata->local->mtx);
2259
2260 if (sdata->local->tmp_channel || sdata->local->scanning) {
2261 mutex_unlock(&sdata->local->mtx);
2262 goto out;
2263 }
2264
2265 if (beacon) {
2266 mlme_dbg_ratelimited(sdata,
2267 "detected beacon loss from AP (missed %d beacons) - probing\n",
2268 beacon_loss_count);
2269
2270 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2271 }
2272
2273 /*
2274 * The driver/our work has already reported this event or the
2275 * connection monitoring has kicked in and we have already sent
2276 * a probe request. Or maybe the AP died and the driver keeps
2277 * reporting until we disassociate...
2278 *
2279 * In either case we have to ignore the current call to this
2280 * function (except for setting the correct probe reason bit)
2281 * because otherwise we would reset the timer every time and
2282 * never check whether we received a probe response!
2283 */
2284 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2285 already = true;
2286
2287 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2288
2289 mutex_unlock(&sdata->local->mtx);
2290
2291 if (already)
2292 goto out;
2293
2294 mutex_lock(&sdata->local->iflist_mtx);
2295 ieee80211_recalc_ps(sdata->local, -1);
2296 mutex_unlock(&sdata->local->iflist_mtx);
2297
2298 ifmgd->probe_send_count = 0;
2299 ieee80211_mgd_probe_ap_send(sdata);
2300 out:
2301 sdata_unlock(sdata);
2302 }
2303
2304 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2305 struct ieee80211_vif *vif)
2306 {
2307 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2308 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2309 struct cfg80211_bss *cbss;
2310 struct sk_buff *skb;
2311 const u8 *ssid;
2312 int ssid_len;
2313
2314 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2315 return NULL;
2316
2317 sdata_assert_lock(sdata);
2318
2319 if (ifmgd->associated)
2320 cbss = ifmgd->associated;
2321 else if (ifmgd->auth_data)
2322 cbss = ifmgd->auth_data->bss;
2323 else if (ifmgd->assoc_data)
2324 cbss = ifmgd->assoc_data->bss;
2325 else
2326 return NULL;
2327
2328 rcu_read_lock();
2329 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2330 if (WARN_ON_ONCE(ssid == NULL))
2331 ssid_len = 0;
2332 else
2333 ssid_len = ssid[1];
2334
2335 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2336 (u32) -1, cbss->channel,
2337 ssid + 2, ssid_len,
2338 NULL, 0, true);
2339 rcu_read_unlock();
2340
2341 return skb;
2342 }
2343 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2344
2345 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2346 {
2347 struct ieee80211_local *local = sdata->local;
2348 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2349 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2350
2351 sdata_lock(sdata);
2352 if (!ifmgd->associated) {
2353 sdata_unlock(sdata);
2354 return;
2355 }
2356
2357 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2358 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2359 true, frame_buf);
2360 mutex_lock(&local->mtx);
2361 sdata->vif.csa_active = false;
2362 ifmgd->csa_waiting_bcn = false;
2363 if (sdata->csa_block_tx) {
2364 ieee80211_wake_vif_queues(local, sdata,
2365 IEEE80211_QUEUE_STOP_REASON_CSA);
2366 sdata->csa_block_tx = false;
2367 }
2368 mutex_unlock(&local->mtx);
2369
2370 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2371 IEEE80211_DEAUTH_FRAME_LEN);
2372 sdata_unlock(sdata);
2373 }
2374
2375 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2376 {
2377 struct ieee80211_sub_if_data *sdata =
2378 container_of(work, struct ieee80211_sub_if_data,
2379 u.mgd.beacon_connection_loss_work);
2380 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2381 struct sta_info *sta;
2382
2383 if (ifmgd->associated) {
2384 rcu_read_lock();
2385 sta = sta_info_get(sdata, ifmgd->bssid);
2386 if (sta)
2387 sta->beacon_loss_count++;
2388 rcu_read_unlock();
2389 }
2390
2391 if (ifmgd->connection_loss) {
2392 sdata_info(sdata, "Connection to AP %pM lost\n",
2393 ifmgd->bssid);
2394 __ieee80211_disconnect(sdata);
2395 } else {
2396 ieee80211_mgd_probe_ap(sdata, true);
2397 }
2398 }
2399
2400 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2401 {
2402 struct ieee80211_sub_if_data *sdata =
2403 container_of(work, struct ieee80211_sub_if_data,
2404 u.mgd.csa_connection_drop_work);
2405
2406 __ieee80211_disconnect(sdata);
2407 }
2408
2409 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2410 {
2411 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2412 struct ieee80211_hw *hw = &sdata->local->hw;
2413
2414 trace_api_beacon_loss(sdata);
2415
2416 sdata->u.mgd.connection_loss = false;
2417 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2418 }
2419 EXPORT_SYMBOL(ieee80211_beacon_loss);
2420
2421 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2422 {
2423 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2424 struct ieee80211_hw *hw = &sdata->local->hw;
2425
2426 trace_api_connection_loss(sdata);
2427
2428 sdata->u.mgd.connection_loss = true;
2429 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2430 }
2431 EXPORT_SYMBOL(ieee80211_connection_loss);
2432
2433
2434 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2435 bool assoc)
2436 {
2437 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2438
2439 sdata_assert_lock(sdata);
2440
2441 if (!assoc) {
2442 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2443
2444 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2445 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2446 sdata->u.mgd.flags = 0;
2447 mutex_lock(&sdata->local->mtx);
2448 ieee80211_vif_release_channel(sdata);
2449 mutex_unlock(&sdata->local->mtx);
2450 }
2451
2452 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2453 kfree(auth_data);
2454 sdata->u.mgd.auth_data = NULL;
2455 }
2456
2457 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2458 struct ieee80211_mgmt *mgmt, size_t len)
2459 {
2460 struct ieee80211_local *local = sdata->local;
2461 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2462 u8 *pos;
2463 struct ieee802_11_elems elems;
2464 u32 tx_flags = 0;
2465
2466 pos = mgmt->u.auth.variable;
2467 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2468 if (!elems.challenge)
2469 return;
2470 auth_data->expected_transaction = 4;
2471 drv_mgd_prepare_tx(sdata->local, sdata);
2472 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2473 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2474 IEEE80211_TX_INTFL_MLME_CONN_TX;
2475 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2476 elems.challenge - 2, elems.challenge_len + 2,
2477 auth_data->bss->bssid, auth_data->bss->bssid,
2478 auth_data->key, auth_data->key_len,
2479 auth_data->key_idx, tx_flags);
2480 }
2481
2482 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2483 struct ieee80211_mgmt *mgmt, size_t len)
2484 {
2485 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2486 u8 bssid[ETH_ALEN];
2487 u16 auth_alg, auth_transaction, status_code;
2488 struct sta_info *sta;
2489
2490 sdata_assert_lock(sdata);
2491
2492 if (len < 24 + 6)
2493 return;
2494
2495 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2496 return;
2497
2498 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2499
2500 if (!ether_addr_equal(bssid, mgmt->bssid))
2501 return;
2502
2503 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2504 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2505 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2506
2507 if (auth_alg != ifmgd->auth_data->algorithm ||
2508 auth_transaction != ifmgd->auth_data->expected_transaction) {
2509 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2510 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2511 auth_transaction,
2512 ifmgd->auth_data->expected_transaction);
2513 return;
2514 }
2515
2516 if (status_code != WLAN_STATUS_SUCCESS) {
2517 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2518 mgmt->sa, status_code);
2519 ieee80211_destroy_auth_data(sdata, false);
2520 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2521 return;
2522 }
2523
2524 switch (ifmgd->auth_data->algorithm) {
2525 case WLAN_AUTH_OPEN:
2526 case WLAN_AUTH_LEAP:
2527 case WLAN_AUTH_FT:
2528 case WLAN_AUTH_SAE:
2529 break;
2530 case WLAN_AUTH_SHARED_KEY:
2531 if (ifmgd->auth_data->expected_transaction != 4) {
2532 ieee80211_auth_challenge(sdata, mgmt, len);
2533 /* need another frame */
2534 return;
2535 }
2536 break;
2537 default:
2538 WARN_ONCE(1, "invalid auth alg %d",
2539 ifmgd->auth_data->algorithm);
2540 return;
2541 }
2542
2543 sdata_info(sdata, "authenticated\n");
2544 ifmgd->auth_data->done = true;
2545 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2546 ifmgd->auth_data->timeout_started = true;
2547 run_again(sdata, ifmgd->auth_data->timeout);
2548
2549 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2550 ifmgd->auth_data->expected_transaction != 2) {
2551 /*
2552 * Report auth frame to user space for processing since another
2553 * round of Authentication frames is still needed.
2554 */
2555 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2556 return;
2557 }
2558
2559 /* move station state to auth */
2560 mutex_lock(&sdata->local->sta_mtx);
2561 sta = sta_info_get(sdata, bssid);
2562 if (!sta) {
2563 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2564 goto out_err;
2565 }
2566 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2567 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2568 goto out_err;
2569 }
2570 mutex_unlock(&sdata->local->sta_mtx);
2571
2572 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2573 return;
2574 out_err:
2575 mutex_unlock(&sdata->local->sta_mtx);
2576 /* ignore frame -- wait for timeout */
2577 }
2578
2579 #define case_WLAN(type) \
2580 case WLAN_REASON_##type: return #type
2581
2582 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2583 {
2584 switch (reason_code) {
2585 case_WLAN(UNSPECIFIED);
2586 case_WLAN(PREV_AUTH_NOT_VALID);
2587 case_WLAN(DEAUTH_LEAVING);
2588 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2589 case_WLAN(DISASSOC_AP_BUSY);
2590 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2591 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2592 case_WLAN(DISASSOC_STA_HAS_LEFT);
2593 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2594 case_WLAN(DISASSOC_BAD_POWER);
2595 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2596 case_WLAN(INVALID_IE);
2597 case_WLAN(MIC_FAILURE);
2598 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2599 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2600 case_WLAN(IE_DIFFERENT);
2601 case_WLAN(INVALID_GROUP_CIPHER);
2602 case_WLAN(INVALID_PAIRWISE_CIPHER);
2603 case_WLAN(INVALID_AKMP);
2604 case_WLAN(UNSUPP_RSN_VERSION);
2605 case_WLAN(INVALID_RSN_IE_CAP);
2606 case_WLAN(IEEE8021X_FAILED);
2607 case_WLAN(CIPHER_SUITE_REJECTED);
2608 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2609 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2610 case_WLAN(DISASSOC_LOW_ACK);
2611 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2612 case_WLAN(QSTA_LEAVE_QBSS);
2613 case_WLAN(QSTA_NOT_USE);
2614 case_WLAN(QSTA_REQUIRE_SETUP);
2615 case_WLAN(QSTA_TIMEOUT);
2616 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2617 case_WLAN(MESH_PEER_CANCELED);
2618 case_WLAN(MESH_MAX_PEERS);
2619 case_WLAN(MESH_CONFIG);
2620 case_WLAN(MESH_CLOSE);
2621 case_WLAN(MESH_MAX_RETRIES);
2622 case_WLAN(MESH_CONFIRM_TIMEOUT);
2623 case_WLAN(MESH_INVALID_GTK);
2624 case_WLAN(MESH_INCONSISTENT_PARAM);
2625 case_WLAN(MESH_INVALID_SECURITY);
2626 case_WLAN(MESH_PATH_ERROR);
2627 case_WLAN(MESH_PATH_NOFORWARD);
2628 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2629 case_WLAN(MAC_EXISTS_IN_MBSS);
2630 case_WLAN(MESH_CHAN_REGULATORY);
2631 case_WLAN(MESH_CHAN);
2632 default: return "<unknown>";
2633 }
2634 }
2635
2636 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2637 struct ieee80211_mgmt *mgmt, size_t len)
2638 {
2639 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2640 const u8 *bssid = NULL;
2641 u16 reason_code;
2642
2643 sdata_assert_lock(sdata);
2644
2645 if (len < 24 + 2)
2646 return;
2647
2648 if (!ifmgd->associated ||
2649 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2650 return;
2651
2652 bssid = ifmgd->associated->bssid;
2653
2654 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2655
2656 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2657 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
2658
2659 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2660
2661 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2662 }
2663
2664
2665 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2666 struct ieee80211_mgmt *mgmt, size_t len)
2667 {
2668 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2669 u16 reason_code;
2670
2671 sdata_assert_lock(sdata);
2672
2673 if (len < 24 + 2)
2674 return;
2675
2676 if (!ifmgd->associated ||
2677 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2678 return;
2679
2680 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2681
2682 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2683 mgmt->sa, reason_code);
2684
2685 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2686
2687 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2688 }
2689
2690 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2691 u8 *supp_rates, unsigned int supp_rates_len,
2692 u32 *rates, u32 *basic_rates,
2693 bool *have_higher_than_11mbit,
2694 int *min_rate, int *min_rate_index,
2695 int shift, u32 rate_flags)
2696 {
2697 int i, j;
2698
2699 for (i = 0; i < supp_rates_len; i++) {
2700 int rate = supp_rates[i] & 0x7f;
2701 bool is_basic = !!(supp_rates[i] & 0x80);
2702
2703 if ((rate * 5 * (1 << shift)) > 110)
2704 *have_higher_than_11mbit = true;
2705
2706 /*
2707 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2708 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2709 *
2710 * Note: Even through the membership selector and the basic
2711 * rate flag share the same bit, they are not exactly
2712 * the same.
2713 */
2714 if (!!(supp_rates[i] & 0x80) &&
2715 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2716 continue;
2717
2718 for (j = 0; j < sband->n_bitrates; j++) {
2719 struct ieee80211_rate *br;
2720 int brate;
2721
2722 br = &sband->bitrates[j];
2723 if ((rate_flags & br->flags) != rate_flags)
2724 continue;
2725
2726 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2727 if (brate == rate) {
2728 *rates |= BIT(j);
2729 if (is_basic)
2730 *basic_rates |= BIT(j);
2731 if ((rate * 5) < *min_rate) {
2732 *min_rate = rate * 5;
2733 *min_rate_index = j;
2734 }
2735 break;
2736 }
2737 }
2738 }
2739 }
2740
2741 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2742 bool assoc)
2743 {
2744 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2745
2746 sdata_assert_lock(sdata);
2747
2748 if (!assoc) {
2749 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2750
2751 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2752 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2753 sdata->u.mgd.flags = 0;
2754 mutex_lock(&sdata->local->mtx);
2755 ieee80211_vif_release_channel(sdata);
2756 mutex_unlock(&sdata->local->mtx);
2757 }
2758
2759 kfree(assoc_data);
2760 sdata->u.mgd.assoc_data = NULL;
2761 }
2762
2763 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2764 struct cfg80211_bss *cbss,
2765 struct ieee80211_mgmt *mgmt, size_t len)
2766 {
2767 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2768 struct ieee80211_local *local = sdata->local;
2769 struct ieee80211_supported_band *sband;
2770 struct sta_info *sta;
2771 u8 *pos;
2772 u16 capab_info, aid;
2773 struct ieee802_11_elems elems;
2774 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2775 const struct cfg80211_bss_ies *bss_ies = NULL;
2776 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2777 u32 changed = 0;
2778 int err;
2779 bool ret;
2780
2781 /* AssocResp and ReassocResp have identical structure */
2782
2783 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2784 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2785
2786 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2787 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2788 aid);
2789 aid &= ~(BIT(15) | BIT(14));
2790
2791 ifmgd->broken_ap = false;
2792
2793 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2794 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2795 aid);
2796 aid = 0;
2797 ifmgd->broken_ap = true;
2798 }
2799
2800 pos = mgmt->u.assoc_resp.variable;
2801 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2802
2803 if (!elems.supp_rates) {
2804 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2805 return false;
2806 }
2807
2808 ifmgd->aid = aid;
2809 ifmgd->tdls_chan_switch_prohibited =
2810 elems.ext_capab && elems.ext_capab_len >= 5 &&
2811 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2812
2813 /*
2814 * Some APs are erroneously not including some information in their
2815 * (re)association response frames. Try to recover by using the data
2816 * from the beacon or probe response. This seems to afflict mobile
2817 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2818 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2819 */
2820 if ((assoc_data->wmm && !elems.wmm_param) ||
2821 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2822 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2823 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2824 (!elems.vht_cap_elem || !elems.vht_operation))) {
2825 const struct cfg80211_bss_ies *ies;
2826 struct ieee802_11_elems bss_elems;
2827
2828 rcu_read_lock();
2829 ies = rcu_dereference(cbss->ies);
2830 if (ies)
2831 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2832 GFP_ATOMIC);
2833 rcu_read_unlock();
2834 if (!bss_ies)
2835 return false;
2836
2837 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2838 false, &bss_elems);
2839 if (assoc_data->wmm &&
2840 !elems.wmm_param && bss_elems.wmm_param) {
2841 elems.wmm_param = bss_elems.wmm_param;
2842 sdata_info(sdata,
2843 "AP bug: WMM param missing from AssocResp\n");
2844 }
2845
2846 /*
2847 * Also check if we requested HT/VHT, otherwise the AP doesn't
2848 * have to include the IEs in the (re)association response.
2849 */
2850 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2851 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2852 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2853 sdata_info(sdata,
2854 "AP bug: HT capability missing from AssocResp\n");
2855 }
2856 if (!elems.ht_operation && bss_elems.ht_operation &&
2857 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2858 elems.ht_operation = bss_elems.ht_operation;
2859 sdata_info(sdata,
2860 "AP bug: HT operation missing from AssocResp\n");
2861 }
2862 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2863 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2864 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2865 sdata_info(sdata,
2866 "AP bug: VHT capa missing from AssocResp\n");
2867 }
2868 if (!elems.vht_operation && bss_elems.vht_operation &&
2869 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2870 elems.vht_operation = bss_elems.vht_operation;
2871 sdata_info(sdata,
2872 "AP bug: VHT operation missing from AssocResp\n");
2873 }
2874 }
2875
2876 /*
2877 * We previously checked these in the beacon/probe response, so
2878 * they should be present here. This is just a safety net.
2879 */
2880 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2881 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2882 sdata_info(sdata,
2883 "HT AP is missing WMM params or HT capability/operation\n");
2884 ret = false;
2885 goto out;
2886 }
2887
2888 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2889 (!elems.vht_cap_elem || !elems.vht_operation)) {
2890 sdata_info(sdata,
2891 "VHT AP is missing VHT capability/operation\n");
2892 ret = false;
2893 goto out;
2894 }
2895
2896 mutex_lock(&sdata->local->sta_mtx);
2897 /*
2898 * station info was already allocated and inserted before
2899 * the association and should be available to us
2900 */
2901 sta = sta_info_get(sdata, cbss->bssid);
2902 if (WARN_ON(!sta)) {
2903 mutex_unlock(&sdata->local->sta_mtx);
2904 ret = false;
2905 goto out;
2906 }
2907
2908 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2909
2910 /* Set up internal HT/VHT capabilities */
2911 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2912 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2913 elems.ht_cap_elem, sta);
2914
2915 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2916 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2917 elems.vht_cap_elem, sta);
2918
2919 /*
2920 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2921 * in their association response, so ignore that data for our own
2922 * configuration. If it changed since the last beacon, we'll get the
2923 * next beacon and update then.
2924 */
2925
2926 /*
2927 * If an operating mode notification IE is present, override the
2928 * NSS calculation (that would be done in rate_control_rate_init())
2929 * and use the # of streams from that element.
2930 */
2931 if (elems.opmode_notif &&
2932 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2933 u8 nss;
2934
2935 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2936 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2937 nss += 1;
2938 sta->sta.rx_nss = nss;
2939 }
2940
2941 rate_control_rate_init(sta);
2942
2943 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2944 set_sta_flag(sta, WLAN_STA_MFP);
2945
2946 sta->sta.wme = elems.wmm_param;
2947
2948 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2949 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2950 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2951 if (err) {
2952 sdata_info(sdata,
2953 "failed to move station %pM to desired state\n",
2954 sta->sta.addr);
2955 WARN_ON(__sta_info_destroy(sta));
2956 mutex_unlock(&sdata->local->sta_mtx);
2957 ret = false;
2958 goto out;
2959 }
2960
2961 mutex_unlock(&sdata->local->sta_mtx);
2962
2963 /*
2964 * Always handle WMM once after association regardless
2965 * of the first value the AP uses. Setting -1 here has
2966 * that effect because the AP values is an unsigned
2967 * 4-bit value.
2968 */
2969 ifmgd->wmm_last_param_set = -1;
2970
2971 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
2972 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2973 elems.wmm_param_len);
2974 else
2975 ieee80211_set_wmm_default(sdata, false);
2976 changed |= BSS_CHANGED_QOS;
2977
2978 /* set AID and assoc capability,
2979 * ieee80211_set_associated() will tell the driver */
2980 bss_conf->aid = aid;
2981 bss_conf->assoc_capability = capab_info;
2982 ieee80211_set_associated(sdata, cbss, changed);
2983
2984 /*
2985 * If we're using 4-addr mode, let the AP know that we're
2986 * doing so, so that it can create the STA VLAN on its side
2987 */
2988 if (ifmgd->use_4addr)
2989 ieee80211_send_4addr_nullfunc(local, sdata);
2990
2991 /*
2992 * Start timer to probe the connection to the AP now.
2993 * Also start the timer that will detect beacon loss.
2994 */
2995 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2996 ieee80211_sta_reset_beacon_monitor(sdata);
2997
2998 ret = true;
2999 out:
3000 kfree(bss_ies);
3001 return ret;
3002 }
3003
3004 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3005 struct ieee80211_mgmt *mgmt,
3006 size_t len)
3007 {
3008 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3009 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3010 u16 capab_info, status_code, aid;
3011 struct ieee802_11_elems elems;
3012 int ac, uapsd_queues = -1;
3013 u8 *pos;
3014 bool reassoc;
3015 struct cfg80211_bss *bss;
3016
3017 sdata_assert_lock(sdata);
3018
3019 if (!assoc_data)
3020 return;
3021 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3022 return;
3023
3024 /*
3025 * AssocResp and ReassocResp have identical structure, so process both
3026 * of them in this function.
3027 */
3028
3029 if (len < 24 + 6)
3030 return;
3031
3032 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3033 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3034 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3035 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3036
3037 sdata_info(sdata,
3038 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3039 reassoc ? "Rea" : "A", mgmt->sa,
3040 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3041
3042 pos = mgmt->u.assoc_resp.variable;
3043 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3044
3045 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3046 elems.timeout_int &&
3047 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3048 u32 tu, ms;
3049 tu = le32_to_cpu(elems.timeout_int->value);
3050 ms = tu * 1024 / 1000;
3051 sdata_info(sdata,
3052 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3053 mgmt->sa, tu, ms);
3054 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3055 assoc_data->timeout_started = true;
3056 if (ms > IEEE80211_ASSOC_TIMEOUT)
3057 run_again(sdata, assoc_data->timeout);
3058 return;
3059 }
3060
3061 bss = assoc_data->bss;
3062
3063 if (status_code != WLAN_STATUS_SUCCESS) {
3064 sdata_info(sdata, "%pM denied association (code=%d)\n",
3065 mgmt->sa, status_code);
3066 ieee80211_destroy_assoc_data(sdata, false);
3067 } else {
3068 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3069 /* oops -- internal error -- send timeout for now */
3070 ieee80211_destroy_assoc_data(sdata, false);
3071 cfg80211_assoc_timeout(sdata->dev, bss);
3072 return;
3073 }
3074 sdata_info(sdata, "associated\n");
3075
3076 /*
3077 * destroy assoc_data afterwards, as otherwise an idle
3078 * recalc after assoc_data is NULL but before associated
3079 * is set can cause the interface to go idle
3080 */
3081 ieee80211_destroy_assoc_data(sdata, true);
3082
3083 /* get uapsd queues configuration */
3084 uapsd_queues = 0;
3085 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3086 if (sdata->tx_conf[ac].uapsd)
3087 uapsd_queues |= BIT(ac);
3088 }
3089
3090 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3091 }
3092
3093 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3094 struct ieee80211_mgmt *mgmt, size_t len,
3095 struct ieee80211_rx_status *rx_status,
3096 struct ieee802_11_elems *elems)
3097 {
3098 struct ieee80211_local *local = sdata->local;
3099 struct ieee80211_bss *bss;
3100 struct ieee80211_channel *channel;
3101
3102 sdata_assert_lock(sdata);
3103
3104 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3105 if (!channel)
3106 return;
3107
3108 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3109 channel);
3110 if (bss) {
3111 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3112 ieee80211_rx_bss_put(local, bss);
3113 }
3114 }
3115
3116
3117 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3118 struct sk_buff *skb)
3119 {
3120 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3121 struct ieee80211_if_managed *ifmgd;
3122 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3123 size_t baselen, len = skb->len;
3124 struct ieee802_11_elems elems;
3125
3126 ifmgd = &sdata->u.mgd;
3127
3128 sdata_assert_lock(sdata);
3129
3130 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3131 return; /* ignore ProbeResp to foreign address */
3132
3133 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3134 if (baselen > len)
3135 return;
3136
3137 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3138 false, &elems);
3139
3140 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3141
3142 if (ifmgd->associated &&
3143 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3144 ieee80211_reset_ap_probe(sdata);
3145
3146 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
3147 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
3148 /* got probe response, continue with auth */
3149 sdata_info(sdata, "direct probe responded\n");
3150 ifmgd->auth_data->tries = 0;
3151 ifmgd->auth_data->timeout = jiffies;
3152 ifmgd->auth_data->timeout_started = true;
3153 run_again(sdata, ifmgd->auth_data->timeout);
3154 }
3155 }
3156
3157 /*
3158 * This is the canonical list of information elements we care about,
3159 * the filter code also gives us all changes to the Microsoft OUI
3160 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3161 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3162 * changes to requested client power.
3163 *
3164 * We implement beacon filtering in software since that means we can
3165 * avoid processing the frame here and in cfg80211, and userspace
3166 * will not be able to tell whether the hardware supports it or not.
3167 *
3168 * XXX: This list needs to be dynamic -- userspace needs to be able to
3169 * add items it requires. It also needs to be able to tell us to
3170 * look out for other vendor IEs.
3171 */
3172 static const u64 care_about_ies =
3173 (1ULL << WLAN_EID_COUNTRY) |
3174 (1ULL << WLAN_EID_ERP_INFO) |
3175 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3176 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3177 (1ULL << WLAN_EID_HT_CAPABILITY) |
3178 (1ULL << WLAN_EID_HT_OPERATION);
3179
3180 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3181 struct ieee80211_mgmt *mgmt, size_t len,
3182 struct ieee80211_rx_status *rx_status)
3183 {
3184 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3185 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3186 size_t baselen;
3187 struct ieee802_11_elems elems;
3188 struct ieee80211_local *local = sdata->local;
3189 struct ieee80211_chanctx_conf *chanctx_conf;
3190 struct ieee80211_channel *chan;
3191 struct sta_info *sta;
3192 u32 changed = 0;
3193 bool erp_valid;
3194 u8 erp_value = 0;
3195 u32 ncrc;
3196 u8 *bssid;
3197 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3198
3199 sdata_assert_lock(sdata);
3200
3201 /* Process beacon from the current BSS */
3202 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3203 if (baselen > len)
3204 return;
3205
3206 rcu_read_lock();
3207 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3208 if (!chanctx_conf) {
3209 rcu_read_unlock();
3210 return;
3211 }
3212
3213 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3214 rcu_read_unlock();
3215 return;
3216 }
3217 chan = chanctx_conf->def.chan;
3218 rcu_read_unlock();
3219
3220 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3221 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3222 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3223 len - baselen, false, &elems);
3224
3225 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3226 if (elems.tim && !elems.parse_error) {
3227 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3228 ifmgd->dtim_period = tim_ie->dtim_period;
3229 }
3230 ifmgd->have_beacon = true;
3231 ifmgd->assoc_data->need_beacon = false;
3232 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3233 sdata->vif.bss_conf.sync_tsf =
3234 le64_to_cpu(mgmt->u.beacon.timestamp);
3235 sdata->vif.bss_conf.sync_device_ts =
3236 rx_status->device_timestamp;
3237 if (elems.tim)
3238 sdata->vif.bss_conf.sync_dtim_count =
3239 elems.tim->dtim_count;
3240 else
3241 sdata->vif.bss_conf.sync_dtim_count = 0;
3242 }
3243 /* continue assoc process */
3244 ifmgd->assoc_data->timeout = jiffies;
3245 ifmgd->assoc_data->timeout_started = true;
3246 run_again(sdata, ifmgd->assoc_data->timeout);
3247 return;
3248 }
3249
3250 if (!ifmgd->associated ||
3251 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3252 return;
3253 bssid = ifmgd->associated->bssid;
3254
3255 /* Track average RSSI from the Beacon frames of the current AP */
3256 ifmgd->last_beacon_signal = rx_status->signal;
3257 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3258 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3259 ifmgd->ave_beacon_signal = rx_status->signal * 16;
3260 ifmgd->last_cqm_event_signal = 0;
3261 ifmgd->count_beacon_signal = 1;
3262 ifmgd->last_ave_beacon_signal = 0;
3263 } else {
3264 ifmgd->ave_beacon_signal =
3265 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3266 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3267 ifmgd->ave_beacon_signal) / 16;
3268 ifmgd->count_beacon_signal++;
3269 }
3270
3271 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3272 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3273 int sig = ifmgd->ave_beacon_signal;
3274 int last_sig = ifmgd->last_ave_beacon_signal;
3275
3276 /*
3277 * if signal crosses either of the boundaries, invoke callback
3278 * with appropriate parameters
3279 */
3280 if (sig > ifmgd->rssi_max_thold &&
3281 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3282 ifmgd->last_ave_beacon_signal = sig;
3283 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3284 } else if (sig < ifmgd->rssi_min_thold &&
3285 (last_sig >= ifmgd->rssi_max_thold ||
3286 last_sig == 0)) {
3287 ifmgd->last_ave_beacon_signal = sig;
3288 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3289 }
3290 }
3291
3292 if (bss_conf->cqm_rssi_thold &&
3293 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3294 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3295 int sig = ifmgd->ave_beacon_signal / 16;
3296 int last_event = ifmgd->last_cqm_event_signal;
3297 int thold = bss_conf->cqm_rssi_thold;
3298 int hyst = bss_conf->cqm_rssi_hyst;
3299 if (sig < thold &&
3300 (last_event == 0 || sig < last_event - hyst)) {
3301 ifmgd->last_cqm_event_signal = sig;
3302 ieee80211_cqm_rssi_notify(
3303 &sdata->vif,
3304 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3305 GFP_KERNEL);
3306 } else if (sig > thold &&
3307 (last_event == 0 || sig > last_event + hyst)) {
3308 ifmgd->last_cqm_event_signal = sig;
3309 ieee80211_cqm_rssi_notify(
3310 &sdata->vif,
3311 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3312 GFP_KERNEL);
3313 }
3314 }
3315
3316 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3317 mlme_dbg_ratelimited(sdata,
3318 "cancelling AP probe due to a received beacon\n");
3319 ieee80211_reset_ap_probe(sdata);
3320 }
3321
3322 /*
3323 * Push the beacon loss detection into the future since
3324 * we are processing a beacon from the AP just now.
3325 */
3326 ieee80211_sta_reset_beacon_monitor(sdata);
3327
3328 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3329 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3330 len - baselen, false, &elems,
3331 care_about_ies, ncrc);
3332
3333 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3334 bool directed_tim = ieee80211_check_tim(elems.tim,
3335 elems.tim_len,
3336 ifmgd->aid);
3337 if (directed_tim) {
3338 if (local->hw.conf.dynamic_ps_timeout > 0) {
3339 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3340 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3341 ieee80211_hw_config(local,
3342 IEEE80211_CONF_CHANGE_PS);
3343 }
3344 ieee80211_send_nullfunc(local, sdata, 0);
3345 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3346 local->pspolling = true;
3347
3348 /*
3349 * Here is assumed that the driver will be
3350 * able to send ps-poll frame and receive a
3351 * response even though power save mode is
3352 * enabled, but some drivers might require
3353 * to disable power save here. This needs
3354 * to be investigated.
3355 */
3356 ieee80211_send_pspoll(local, sdata);
3357 }
3358 }
3359 }
3360
3361 if (sdata->vif.p2p) {
3362 struct ieee80211_p2p_noa_attr noa = {};
3363 int ret;
3364
3365 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3366 len - baselen,
3367 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3368 (u8 *) &noa, sizeof(noa));
3369 if (ret >= 2) {
3370 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3371 /* valid noa_attr and index changed */
3372 sdata->u.mgd.p2p_noa_index = noa.index;
3373 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3374 changed |= BSS_CHANGED_P2P_PS;
3375 /*
3376 * make sure we update all information, the CRC
3377 * mechanism doesn't look at P2P attributes.
3378 */
3379 ifmgd->beacon_crc_valid = false;
3380 }
3381 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3382 /* noa_attr not found and we had valid noa_attr before */
3383 sdata->u.mgd.p2p_noa_index = -1;
3384 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3385 changed |= BSS_CHANGED_P2P_PS;
3386 ifmgd->beacon_crc_valid = false;
3387 }
3388 }
3389
3390 if (ifmgd->csa_waiting_bcn)
3391 ieee80211_chswitch_post_beacon(sdata);
3392
3393 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3394 return;
3395 ifmgd->beacon_crc = ncrc;
3396 ifmgd->beacon_crc_valid = true;
3397
3398 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3399
3400 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3401 rx_status->device_timestamp,
3402 &elems, true);
3403
3404 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3405 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3406 elems.wmm_param_len))
3407 changed |= BSS_CHANGED_QOS;
3408
3409 /*
3410 * If we haven't had a beacon before, tell the driver about the
3411 * DTIM period (and beacon timing if desired) now.
3412 */
3413 if (!ifmgd->have_beacon) {
3414 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3415 if (elems.tim)
3416 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3417 else
3418 bss_conf->dtim_period = 1;
3419
3420 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3421 sdata->vif.bss_conf.sync_tsf =
3422 le64_to_cpu(mgmt->u.beacon.timestamp);
3423 sdata->vif.bss_conf.sync_device_ts =
3424 rx_status->device_timestamp;
3425 if (elems.tim)
3426 sdata->vif.bss_conf.sync_dtim_count =
3427 elems.tim->dtim_count;
3428 else
3429 sdata->vif.bss_conf.sync_dtim_count = 0;
3430 }
3431
3432 changed |= BSS_CHANGED_BEACON_INFO;
3433 ifmgd->have_beacon = true;
3434
3435 mutex_lock(&local->iflist_mtx);
3436 ieee80211_recalc_ps(local, -1);
3437 mutex_unlock(&local->iflist_mtx);
3438
3439 ieee80211_recalc_ps_vif(sdata);
3440 }
3441
3442 if (elems.erp_info) {
3443 erp_valid = true;
3444 erp_value = elems.erp_info[0];
3445 } else {
3446 erp_valid = false;
3447 }
3448 changed |= ieee80211_handle_bss_capability(sdata,
3449 le16_to_cpu(mgmt->u.beacon.capab_info),
3450 erp_valid, erp_value);
3451
3452 mutex_lock(&local->sta_mtx);
3453 sta = sta_info_get(sdata, bssid);
3454
3455 if (ieee80211_config_bw(sdata, sta,
3456 elems.ht_cap_elem, elems.ht_operation,
3457 elems.vht_operation, bssid, &changed)) {
3458 mutex_unlock(&local->sta_mtx);
3459 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3460 WLAN_REASON_DEAUTH_LEAVING,
3461 true, deauth_buf);
3462 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3463 sizeof(deauth_buf));
3464 return;
3465 }
3466
3467 if (sta && elems.opmode_notif)
3468 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3469 rx_status->band, true);
3470 mutex_unlock(&local->sta_mtx);
3471
3472 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3473 elems.country_elem,
3474 elems.country_elem_len,
3475 elems.pwr_constr_elem,
3476 elems.cisco_dtpc_elem);
3477
3478 ieee80211_bss_info_change_notify(sdata, changed);
3479 }
3480
3481 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3482 struct sk_buff *skb)
3483 {
3484 struct ieee80211_rx_status *rx_status;
3485 struct ieee80211_mgmt *mgmt;
3486 u16 fc;
3487 struct ieee802_11_elems elems;
3488 int ies_len;
3489
3490 rx_status = (struct ieee80211_rx_status *) skb->cb;
3491 mgmt = (struct ieee80211_mgmt *) skb->data;
3492 fc = le16_to_cpu(mgmt->frame_control);
3493
3494 sdata_lock(sdata);
3495
3496 switch (fc & IEEE80211_FCTL_STYPE) {
3497 case IEEE80211_STYPE_BEACON:
3498 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3499 break;
3500 case IEEE80211_STYPE_PROBE_RESP:
3501 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3502 break;
3503 case IEEE80211_STYPE_AUTH:
3504 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3505 break;
3506 case IEEE80211_STYPE_DEAUTH:
3507 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3508 break;
3509 case IEEE80211_STYPE_DISASSOC:
3510 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3511 break;
3512 case IEEE80211_STYPE_ASSOC_RESP:
3513 case IEEE80211_STYPE_REASSOC_RESP:
3514 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3515 break;
3516 case IEEE80211_STYPE_ACTION:
3517 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3518 ies_len = skb->len -
3519 offsetof(struct ieee80211_mgmt,
3520 u.action.u.chan_switch.variable);
3521
3522 if (ies_len < 0)
3523 break;
3524
3525 ieee802_11_parse_elems(
3526 mgmt->u.action.u.chan_switch.variable,
3527 ies_len, true, &elems);
3528
3529 if (elems.parse_error)
3530 break;
3531
3532 ieee80211_sta_process_chanswitch(sdata,
3533 rx_status->mactime,
3534 rx_status->device_timestamp,
3535 &elems, false);
3536 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3537 ies_len = skb->len -
3538 offsetof(struct ieee80211_mgmt,
3539 u.action.u.ext_chan_switch.variable);
3540
3541 if (ies_len < 0)
3542 break;
3543
3544 ieee802_11_parse_elems(
3545 mgmt->u.action.u.ext_chan_switch.variable,
3546 ies_len, true, &elems);
3547
3548 if (elems.parse_error)
3549 break;
3550
3551 /* for the handling code pretend this was also an IE */
3552 elems.ext_chansw_ie =
3553 &mgmt->u.action.u.ext_chan_switch.data;
3554
3555 ieee80211_sta_process_chanswitch(sdata,
3556 rx_status->mactime,
3557 rx_status->device_timestamp,
3558 &elems, false);
3559 }
3560 break;
3561 }
3562 sdata_unlock(sdata);
3563 }
3564
3565 static void ieee80211_sta_timer(unsigned long data)
3566 {
3567 struct ieee80211_sub_if_data *sdata =
3568 (struct ieee80211_sub_if_data *) data;
3569
3570 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3571 }
3572
3573 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3574 u8 *bssid, u8 reason, bool tx)
3575 {
3576 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3577
3578 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3579 tx, frame_buf);
3580
3581 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3582 IEEE80211_DEAUTH_FRAME_LEN);
3583 }
3584
3585 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3586 {
3587 struct ieee80211_local *local = sdata->local;
3588 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3589 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3590 u32 tx_flags = 0;
3591
3592 sdata_assert_lock(sdata);
3593
3594 if (WARN_ON_ONCE(!auth_data))
3595 return -EINVAL;
3596
3597 auth_data->tries++;
3598
3599 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3600 sdata_info(sdata, "authentication with %pM timed out\n",
3601 auth_data->bss->bssid);
3602
3603 /*
3604 * Most likely AP is not in the range so remove the
3605 * bss struct for that AP.
3606 */
3607 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3608
3609 return -ETIMEDOUT;
3610 }
3611
3612 drv_mgd_prepare_tx(local, sdata);
3613
3614 if (auth_data->bss->proberesp_ies) {
3615 u16 trans = 1;
3616 u16 status = 0;
3617
3618 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3619 auth_data->bss->bssid, auth_data->tries,
3620 IEEE80211_AUTH_MAX_TRIES);
3621
3622 auth_data->expected_transaction = 2;
3623
3624 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3625 trans = auth_data->sae_trans;
3626 status = auth_data->sae_status;
3627 auth_data->expected_transaction = trans;
3628 }
3629
3630 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3631 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3632 IEEE80211_TX_INTFL_MLME_CONN_TX;
3633
3634 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3635 auth_data->data, auth_data->data_len,
3636 auth_data->bss->bssid,
3637 auth_data->bss->bssid, NULL, 0, 0,
3638 tx_flags);
3639 } else {
3640 const u8 *ssidie;
3641
3642 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3643 auth_data->bss->bssid, auth_data->tries,
3644 IEEE80211_AUTH_MAX_TRIES);
3645
3646 rcu_read_lock();
3647 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3648 if (!ssidie) {
3649 rcu_read_unlock();
3650 return -EINVAL;
3651 }
3652 /*
3653 * Direct probe is sent to broadcast address as some APs
3654 * will not answer to direct packet in unassociated state.
3655 */
3656 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
3657 ssidie + 2, ssidie[1],
3658 NULL, 0, (u32) -1, true, 0,
3659 auth_data->bss->channel, false);
3660 rcu_read_unlock();
3661 }
3662
3663 if (tx_flags == 0) {
3664 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3665 auth_data->timeout_started = true;
3666 run_again(sdata, auth_data->timeout);
3667 } else {
3668 auth_data->timeout =
3669 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3670 auth_data->timeout_started = true;
3671 run_again(sdata, auth_data->timeout);
3672 }
3673
3674 return 0;
3675 }
3676
3677 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3678 {
3679 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3680 struct ieee80211_local *local = sdata->local;
3681
3682 sdata_assert_lock(sdata);
3683
3684 assoc_data->tries++;
3685 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3686 sdata_info(sdata, "association with %pM timed out\n",
3687 assoc_data->bss->bssid);
3688
3689 /*
3690 * Most likely AP is not in the range so remove the
3691 * bss struct for that AP.
3692 */
3693 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3694
3695 return -ETIMEDOUT;
3696 }
3697
3698 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3699 assoc_data->bss->bssid, assoc_data->tries,
3700 IEEE80211_ASSOC_MAX_TRIES);
3701 ieee80211_send_assoc(sdata);
3702
3703 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3704 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3705 assoc_data->timeout_started = true;
3706 run_again(sdata, assoc_data->timeout);
3707 } else {
3708 assoc_data->timeout =
3709 round_jiffies_up(jiffies +
3710 IEEE80211_ASSOC_TIMEOUT_LONG);
3711 assoc_data->timeout_started = true;
3712 run_again(sdata, assoc_data->timeout);
3713 }
3714
3715 return 0;
3716 }
3717
3718 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3719 __le16 fc, bool acked)
3720 {
3721 struct ieee80211_local *local = sdata->local;
3722
3723 sdata->u.mgd.status_fc = fc;
3724 sdata->u.mgd.status_acked = acked;
3725 sdata->u.mgd.status_received = true;
3726
3727 ieee80211_queue_work(&local->hw, &sdata->work);
3728 }
3729
3730 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3731 {
3732 struct ieee80211_local *local = sdata->local;
3733 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3734
3735 sdata_lock(sdata);
3736
3737 if (ifmgd->status_received) {
3738 __le16 fc = ifmgd->status_fc;
3739 bool status_acked = ifmgd->status_acked;
3740
3741 ifmgd->status_received = false;
3742 if (ifmgd->auth_data &&
3743 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3744 if (status_acked) {
3745 ifmgd->auth_data->timeout =
3746 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3747 run_again(sdata, ifmgd->auth_data->timeout);
3748 } else {
3749 ifmgd->auth_data->timeout = jiffies - 1;
3750 }
3751 ifmgd->auth_data->timeout_started = true;
3752 } else if (ifmgd->assoc_data &&
3753 (ieee80211_is_assoc_req(fc) ||
3754 ieee80211_is_reassoc_req(fc))) {
3755 if (status_acked) {
3756 ifmgd->assoc_data->timeout =
3757 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3758 run_again(sdata, ifmgd->assoc_data->timeout);
3759 } else {
3760 ifmgd->assoc_data->timeout = jiffies - 1;
3761 }
3762 ifmgd->assoc_data->timeout_started = true;
3763 }
3764 }
3765
3766 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3767 time_after(jiffies, ifmgd->auth_data->timeout)) {
3768 if (ifmgd->auth_data->done) {
3769 /*
3770 * ok ... we waited for assoc but userspace didn't,
3771 * so let's just kill the auth data
3772 */
3773 ieee80211_destroy_auth_data(sdata, false);
3774 } else if (ieee80211_probe_auth(sdata)) {
3775 u8 bssid[ETH_ALEN];
3776
3777 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3778
3779 ieee80211_destroy_auth_data(sdata, false);
3780
3781 cfg80211_auth_timeout(sdata->dev, bssid);
3782 }
3783 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3784 run_again(sdata, ifmgd->auth_data->timeout);
3785
3786 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3787 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3788 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3789 ieee80211_do_assoc(sdata)) {
3790 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3791
3792 ieee80211_destroy_assoc_data(sdata, false);
3793 cfg80211_assoc_timeout(sdata->dev, bss);
3794 }
3795 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3796 run_again(sdata, ifmgd->assoc_data->timeout);
3797
3798 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3799 ifmgd->associated) {
3800 u8 bssid[ETH_ALEN];
3801 int max_tries;
3802
3803 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3804
3805 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3806 max_tries = max_nullfunc_tries;
3807 else
3808 max_tries = max_probe_tries;
3809
3810 /* ACK received for nullfunc probing frame */
3811 if (!ifmgd->probe_send_count)
3812 ieee80211_reset_ap_probe(sdata);
3813 else if (ifmgd->nullfunc_failed) {
3814 if (ifmgd->probe_send_count < max_tries) {
3815 mlme_dbg(sdata,
3816 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3817 bssid, ifmgd->probe_send_count,
3818 max_tries);
3819 ieee80211_mgd_probe_ap_send(sdata);
3820 } else {
3821 mlme_dbg(sdata,
3822 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3823 bssid);
3824 ieee80211_sta_connection_lost(sdata, bssid,
3825 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3826 false);
3827 }
3828 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3829 run_again(sdata, ifmgd->probe_timeout);
3830 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3831 mlme_dbg(sdata,
3832 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3833 bssid, probe_wait_ms);
3834 ieee80211_sta_connection_lost(sdata, bssid,
3835 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3836 } else if (ifmgd->probe_send_count < max_tries) {
3837 mlme_dbg(sdata,
3838 "No probe response from AP %pM after %dms, try %d/%i\n",
3839 bssid, probe_wait_ms,
3840 ifmgd->probe_send_count, max_tries);
3841 ieee80211_mgd_probe_ap_send(sdata);
3842 } else {
3843 /*
3844 * We actually lost the connection ... or did we?
3845 * Let's make sure!
3846 */
3847 wiphy_debug(local->hw.wiphy,
3848 "%s: No probe response from AP %pM"
3849 " after %dms, disconnecting.\n",
3850 sdata->name,
3851 bssid, probe_wait_ms);
3852
3853 ieee80211_sta_connection_lost(sdata, bssid,
3854 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3855 }
3856 }
3857
3858 sdata_unlock(sdata);
3859 }
3860
3861 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3862 {
3863 struct ieee80211_sub_if_data *sdata =
3864 (struct ieee80211_sub_if_data *) data;
3865 struct ieee80211_local *local = sdata->local;
3866 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3867
3868 if (local->quiescing)
3869 return;
3870
3871 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3872 return;
3873
3874 sdata->u.mgd.connection_loss = false;
3875 ieee80211_queue_work(&sdata->local->hw,
3876 &sdata->u.mgd.beacon_connection_loss_work);
3877 }
3878
3879 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3880 {
3881 struct ieee80211_sub_if_data *sdata =
3882 (struct ieee80211_sub_if_data *) data;
3883 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3884 struct ieee80211_local *local = sdata->local;
3885
3886 if (local->quiescing)
3887 return;
3888
3889 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3890 return;
3891
3892 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3893 }
3894
3895 static void ieee80211_sta_monitor_work(struct work_struct *work)
3896 {
3897 struct ieee80211_sub_if_data *sdata =
3898 container_of(work, struct ieee80211_sub_if_data,
3899 u.mgd.monitor_work);
3900
3901 ieee80211_mgd_probe_ap(sdata, false);
3902 }
3903
3904 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3905 {
3906 u32 flags;
3907
3908 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3909 __ieee80211_stop_poll(sdata);
3910
3911 /* let's probe the connection once */
3912 flags = sdata->local->hw.flags;
3913 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3914 ieee80211_queue_work(&sdata->local->hw,
3915 &sdata->u.mgd.monitor_work);
3916 /* and do all the other regular work too */
3917 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3918 }
3919 }
3920
3921 #ifdef CONFIG_PM
3922 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3923 {
3924 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3925 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3926
3927 sdata_lock(sdata);
3928
3929 if (ifmgd->auth_data || ifmgd->assoc_data) {
3930 const u8 *bssid = ifmgd->auth_data ?
3931 ifmgd->auth_data->bss->bssid :
3932 ifmgd->assoc_data->bss->bssid;
3933
3934 /*
3935 * If we are trying to authenticate / associate while suspending,
3936 * cfg80211 won't know and won't actually abort those attempts,
3937 * thus we need to do that ourselves.
3938 */
3939 ieee80211_send_deauth_disassoc(sdata, bssid,
3940 IEEE80211_STYPE_DEAUTH,
3941 WLAN_REASON_DEAUTH_LEAVING,
3942 false, frame_buf);
3943 if (ifmgd->assoc_data)
3944 ieee80211_destroy_assoc_data(sdata, false);
3945 if (ifmgd->auth_data)
3946 ieee80211_destroy_auth_data(sdata, false);
3947 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3948 IEEE80211_DEAUTH_FRAME_LEN);
3949 }
3950
3951 sdata_unlock(sdata);
3952 }
3953
3954 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3955 {
3956 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3957
3958 sdata_lock(sdata);
3959 if (!ifmgd->associated) {
3960 sdata_unlock(sdata);
3961 return;
3962 }
3963
3964 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3965 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3966 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3967 ieee80211_sta_connection_lost(sdata,
3968 ifmgd->associated->bssid,
3969 WLAN_REASON_UNSPECIFIED,
3970 true);
3971 sdata_unlock(sdata);
3972 return;
3973 }
3974 sdata_unlock(sdata);
3975 }
3976 #endif
3977
3978 /* interface setup */
3979 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3980 {
3981 struct ieee80211_if_managed *ifmgd;
3982
3983 ifmgd = &sdata->u.mgd;
3984 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3985 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3986 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3987 ieee80211_beacon_connection_loss_work);
3988 INIT_WORK(&ifmgd->csa_connection_drop_work,
3989 ieee80211_csa_connection_drop_work);
3990 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
3991 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
3992 ieee80211_tdls_peer_del_work);
3993 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3994 (unsigned long) sdata);
3995 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3996 (unsigned long) sdata);
3997 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3998 (unsigned long) sdata);
3999 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4000 (unsigned long) sdata);
4001 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4002 ieee80211_sta_handle_tspec_ac_params_wk);
4003
4004 ifmgd->flags = 0;
4005 ifmgd->powersave = sdata->wdev.ps;
4006 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4007 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4008 ifmgd->p2p_noa_index = -1;
4009
4010 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4011 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4012 else
4013 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4014
4015 /* Setup TDLS data */
4016 spin_lock_init(&ifmgd->teardown_lock);
4017 ifmgd->teardown_skb = NULL;
4018 ifmgd->orig_teardown_skb = NULL;
4019 }
4020
4021 /* scan finished notification */
4022 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4023 {
4024 struct ieee80211_sub_if_data *sdata;
4025
4026 /* Restart STA timers */
4027 rcu_read_lock();
4028 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4029 if (ieee80211_sdata_running(sdata))
4030 ieee80211_restart_sta_timer(sdata);
4031 }
4032 rcu_read_unlock();
4033 }
4034
4035 int ieee80211_max_network_latency(struct notifier_block *nb,
4036 unsigned long data, void *dummy)
4037 {
4038 s32 latency_usec = (s32) data;
4039 struct ieee80211_local *local =
4040 container_of(nb, struct ieee80211_local,
4041 network_latency_notifier);
4042
4043 mutex_lock(&local->iflist_mtx);
4044 ieee80211_recalc_ps(local, latency_usec);
4045 mutex_unlock(&local->iflist_mtx);
4046
4047 return NOTIFY_OK;
4048 }
4049
4050 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4051 struct cfg80211_bss *cbss)
4052 {
4053 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4054 const u8 *ht_cap_ie, *vht_cap_ie;
4055 const struct ieee80211_ht_cap *ht_cap;
4056 const struct ieee80211_vht_cap *vht_cap;
4057 u8 chains = 1;
4058
4059 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4060 return chains;
4061
4062 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4063 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4064 ht_cap = (void *)(ht_cap_ie + 2);
4065 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4066 /*
4067 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4068 * "Tx Unequal Modulation Supported" fields.
4069 */
4070 }
4071
4072 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4073 return chains;
4074
4075 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4076 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4077 u8 nss;
4078 u16 tx_mcs_map;
4079
4080 vht_cap = (void *)(vht_cap_ie + 2);
4081 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4082 for (nss = 8; nss > 0; nss--) {
4083 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4084 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4085 break;
4086 }
4087 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4088 chains = max(chains, nss);
4089 }
4090
4091 return chains;
4092 }
4093
4094 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4095 struct cfg80211_bss *cbss)
4096 {
4097 struct ieee80211_local *local = sdata->local;
4098 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4099 const struct ieee80211_ht_cap *ht_cap = NULL;
4100 const struct ieee80211_ht_operation *ht_oper = NULL;
4101 const struct ieee80211_vht_operation *vht_oper = NULL;
4102 struct ieee80211_supported_band *sband;
4103 struct cfg80211_chan_def chandef;
4104 int ret;
4105
4106 sband = local->hw.wiphy->bands[cbss->channel->band];
4107
4108 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4109 IEEE80211_STA_DISABLE_80P80MHZ |
4110 IEEE80211_STA_DISABLE_160MHZ);
4111
4112 rcu_read_lock();
4113
4114 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4115 sband->ht_cap.ht_supported) {
4116 const u8 *ht_oper_ie, *ht_cap_ie;
4117
4118 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4119 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4120 ht_oper = (void *)(ht_oper_ie + 2);
4121
4122 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4123 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4124 ht_cap = (void *)(ht_cap_ie + 2);
4125
4126 if (!ht_cap) {
4127 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4128 ht_oper = NULL;
4129 }
4130 }
4131
4132 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4133 sband->vht_cap.vht_supported) {
4134 const u8 *vht_oper_ie, *vht_cap;
4135
4136 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4137 WLAN_EID_VHT_OPERATION);
4138 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4139 vht_oper = (void *)(vht_oper_ie + 2);
4140 if (vht_oper && !ht_oper) {
4141 vht_oper = NULL;
4142 sdata_info(sdata,
4143 "AP advertised VHT without HT, disabling both\n");
4144 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4145 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4146 }
4147
4148 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4149 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4150 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4151 vht_oper = NULL;
4152 }
4153 }
4154
4155 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4156 cbss->channel,
4157 ht_cap, ht_oper, vht_oper,
4158 &chandef, false);
4159
4160 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4161 local->rx_chains);
4162
4163 rcu_read_unlock();
4164
4165 /* will change later if needed */
4166 sdata->smps_mode = IEEE80211_SMPS_OFF;
4167
4168 mutex_lock(&local->mtx);
4169 /*
4170 * If this fails (possibly due to channel context sharing
4171 * on incompatible channels, e.g. 80+80 and 160 sharing the
4172 * same control channel) try to use a smaller bandwidth.
4173 */
4174 ret = ieee80211_vif_use_channel(sdata, &chandef,
4175 IEEE80211_CHANCTX_SHARED);
4176
4177 /* don't downgrade for 5 and 10 MHz channels, though. */
4178 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4179 chandef.width == NL80211_CHAN_WIDTH_10)
4180 goto out;
4181
4182 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4183 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4184 ret = ieee80211_vif_use_channel(sdata, &chandef,
4185 IEEE80211_CHANCTX_SHARED);
4186 }
4187 out:
4188 mutex_unlock(&local->mtx);
4189 return ret;
4190 }
4191
4192 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4193 struct cfg80211_bss *cbss, bool assoc)
4194 {
4195 struct ieee80211_local *local = sdata->local;
4196 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4197 struct ieee80211_bss *bss = (void *)cbss->priv;
4198 struct sta_info *new_sta = NULL;
4199 bool have_sta = false;
4200 int err;
4201
4202 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4203 return -EINVAL;
4204
4205 if (assoc) {
4206 rcu_read_lock();
4207 have_sta = sta_info_get(sdata, cbss->bssid);
4208 rcu_read_unlock();
4209 }
4210
4211 if (!have_sta) {
4212 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4213 if (!new_sta)
4214 return -ENOMEM;
4215 }
4216 if (new_sta) {
4217 u32 rates = 0, basic_rates = 0;
4218 bool have_higher_than_11mbit;
4219 int min_rate = INT_MAX, min_rate_index = -1;
4220 struct ieee80211_chanctx_conf *chanctx_conf;
4221 struct ieee80211_supported_band *sband;
4222 const struct cfg80211_bss_ies *ies;
4223 int shift;
4224 u32 rate_flags;
4225
4226 sband = local->hw.wiphy->bands[cbss->channel->band];
4227
4228 err = ieee80211_prep_channel(sdata, cbss);
4229 if (err) {
4230 sta_info_free(local, new_sta);
4231 return -EINVAL;
4232 }
4233 shift = ieee80211_vif_get_shift(&sdata->vif);
4234
4235 rcu_read_lock();
4236 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4237 if (WARN_ON(!chanctx_conf)) {
4238 rcu_read_unlock();
4239 sta_info_free(local, new_sta);
4240 return -EINVAL;
4241 }
4242 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4243 rcu_read_unlock();
4244
4245 ieee80211_get_rates(sband, bss->supp_rates,
4246 bss->supp_rates_len,
4247 &rates, &basic_rates,
4248 &have_higher_than_11mbit,
4249 &min_rate, &min_rate_index,
4250 shift, rate_flags);
4251
4252 /*
4253 * This used to be a workaround for basic rates missing
4254 * in the association response frame. Now that we no
4255 * longer use the basic rates from there, it probably
4256 * doesn't happen any more, but keep the workaround so
4257 * in case some *other* APs are buggy in different ways
4258 * we can connect -- with a warning.
4259 */
4260 if (!basic_rates && min_rate_index >= 0) {
4261 sdata_info(sdata,
4262 "No basic rates, using min rate instead\n");
4263 basic_rates = BIT(min_rate_index);
4264 }
4265
4266 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4267 sdata->vif.bss_conf.basic_rates = basic_rates;
4268
4269 /* cf. IEEE 802.11 9.2.12 */
4270 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4271 have_higher_than_11mbit)
4272 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4273 else
4274 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4275
4276 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4277
4278 /* set timing information */
4279 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4280 rcu_read_lock();
4281 ies = rcu_dereference(cbss->beacon_ies);
4282 if (ies) {
4283 const u8 *tim_ie;
4284
4285 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4286 sdata->vif.bss_conf.sync_device_ts =
4287 bss->device_ts_beacon;
4288 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4289 ies->data, ies->len);
4290 if (tim_ie && tim_ie[1] >= 2)
4291 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4292 else
4293 sdata->vif.bss_conf.sync_dtim_count = 0;
4294 } else if (!(local->hw.flags &
4295 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4296 ies = rcu_dereference(cbss->proberesp_ies);
4297 /* must be non-NULL since beacon IEs were NULL */
4298 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4299 sdata->vif.bss_conf.sync_device_ts =
4300 bss->device_ts_presp;
4301 sdata->vif.bss_conf.sync_dtim_count = 0;
4302 } else {
4303 sdata->vif.bss_conf.sync_tsf = 0;
4304 sdata->vif.bss_conf.sync_device_ts = 0;
4305 sdata->vif.bss_conf.sync_dtim_count = 0;
4306 }
4307 rcu_read_unlock();
4308
4309 /* tell driver about BSSID, basic rates and timing */
4310 ieee80211_bss_info_change_notify(sdata,
4311 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4312 BSS_CHANGED_BEACON_INT);
4313
4314 if (assoc)
4315 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4316
4317 err = sta_info_insert(new_sta);
4318 new_sta = NULL;
4319 if (err) {
4320 sdata_info(sdata,
4321 "failed to insert STA entry for the AP (error %d)\n",
4322 err);
4323 return err;
4324 }
4325 } else
4326 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4327
4328 return 0;
4329 }
4330
4331 /* config hooks */
4332 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4333 struct cfg80211_auth_request *req)
4334 {
4335 struct ieee80211_local *local = sdata->local;
4336 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4337 struct ieee80211_mgd_auth_data *auth_data;
4338 u16 auth_alg;
4339 int err;
4340
4341 /* prepare auth data structure */
4342
4343 switch (req->auth_type) {
4344 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4345 auth_alg = WLAN_AUTH_OPEN;
4346 break;
4347 case NL80211_AUTHTYPE_SHARED_KEY:
4348 if (IS_ERR(local->wep_tx_tfm))
4349 return -EOPNOTSUPP;
4350 auth_alg = WLAN_AUTH_SHARED_KEY;
4351 break;
4352 case NL80211_AUTHTYPE_FT:
4353 auth_alg = WLAN_AUTH_FT;
4354 break;
4355 case NL80211_AUTHTYPE_NETWORK_EAP:
4356 auth_alg = WLAN_AUTH_LEAP;
4357 break;
4358 case NL80211_AUTHTYPE_SAE:
4359 auth_alg = WLAN_AUTH_SAE;
4360 break;
4361 default:
4362 return -EOPNOTSUPP;
4363 }
4364
4365 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4366 req->ie_len, GFP_KERNEL);
4367 if (!auth_data)
4368 return -ENOMEM;
4369
4370 auth_data->bss = req->bss;
4371
4372 if (req->sae_data_len >= 4) {
4373 __le16 *pos = (__le16 *) req->sae_data;
4374 auth_data->sae_trans = le16_to_cpu(pos[0]);
4375 auth_data->sae_status = le16_to_cpu(pos[1]);
4376 memcpy(auth_data->data, req->sae_data + 4,
4377 req->sae_data_len - 4);
4378 auth_data->data_len += req->sae_data_len - 4;
4379 }
4380
4381 if (req->ie && req->ie_len) {
4382 memcpy(&auth_data->data[auth_data->data_len],
4383 req->ie, req->ie_len);
4384 auth_data->data_len += req->ie_len;
4385 }
4386
4387 if (req->key && req->key_len) {
4388 auth_data->key_len = req->key_len;
4389 auth_data->key_idx = req->key_idx;
4390 memcpy(auth_data->key, req->key, req->key_len);
4391 }
4392
4393 auth_data->algorithm = auth_alg;
4394
4395 /* try to authenticate/probe */
4396
4397 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4398 ifmgd->assoc_data) {
4399 err = -EBUSY;
4400 goto err_free;
4401 }
4402
4403 if (ifmgd->auth_data)
4404 ieee80211_destroy_auth_data(sdata, false);
4405
4406 /* prep auth_data so we don't go into idle on disassoc */
4407 ifmgd->auth_data = auth_data;
4408
4409 if (ifmgd->associated) {
4410 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4411
4412 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4413 WLAN_REASON_UNSPECIFIED,
4414 false, frame_buf);
4415
4416 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4417 sizeof(frame_buf));
4418 }
4419
4420 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4421
4422 err = ieee80211_prep_connection(sdata, req->bss, false);
4423 if (err)
4424 goto err_clear;
4425
4426 err = ieee80211_probe_auth(sdata);
4427 if (err) {
4428 sta_info_destroy_addr(sdata, req->bss->bssid);
4429 goto err_clear;
4430 }
4431
4432 /* hold our own reference */
4433 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4434 return 0;
4435
4436 err_clear:
4437 memset(ifmgd->bssid, 0, ETH_ALEN);
4438 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4439 ifmgd->auth_data = NULL;
4440 err_free:
4441 kfree(auth_data);
4442 return err;
4443 }
4444
4445 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4446 const u8 *wmm_param, int len)
4447 {
4448 const u8 *pos;
4449 size_t left;
4450
4451 if (len < 8)
4452 return false;
4453
4454 if (wmm_param[5] != 1 /* version */)
4455 return false;
4456
4457 pos = wmm_param + 8;
4458 left = len - 8;
4459
4460 for (; left >= 4; left -= 4, pos += 4) {
4461 u8 aifsn = pos[0] & 0x0f;
4462 u8 ecwmin = pos[1] & 0x0f;
4463 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4464 int aci = (pos[0] >> 5) & 0x03;
4465
4466 if (aifsn < 2) {
4467 sdata_info(sdata,
4468 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4469 aifsn, aci);
4470 return false;
4471 }
4472 if (ecwmin > ecwmax) {
4473 sdata_info(sdata,
4474 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4475 ecwmin, ecwmax, aci);
4476 return false;
4477 }
4478 }
4479
4480 return true;
4481 }
4482
4483 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4484 struct cfg80211_assoc_request *req)
4485 {
4486 struct ieee80211_local *local = sdata->local;
4487 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4488 struct ieee80211_bss *bss = (void *)req->bss->priv;
4489 struct ieee80211_mgd_assoc_data *assoc_data;
4490 const struct cfg80211_bss_ies *beacon_ies;
4491 struct ieee80211_supported_band *sband;
4492 const u8 *ssidie, *ht_ie, *vht_ie;
4493 int i, err;
4494
4495 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4496 if (!assoc_data)
4497 return -ENOMEM;
4498
4499 rcu_read_lock();
4500 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4501 if (!ssidie) {
4502 rcu_read_unlock();
4503 kfree(assoc_data);
4504 return -EINVAL;
4505 }
4506 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4507 assoc_data->ssid_len = ssidie[1];
4508 rcu_read_unlock();
4509
4510 if (ifmgd->associated) {
4511 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4512
4513 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4514 WLAN_REASON_UNSPECIFIED,
4515 false, frame_buf);
4516
4517 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4518 sizeof(frame_buf));
4519 }
4520
4521 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4522 err = -EBUSY;
4523 goto err_free;
4524 }
4525
4526 if (ifmgd->assoc_data) {
4527 err = -EBUSY;
4528 goto err_free;
4529 }
4530
4531 if (ifmgd->auth_data) {
4532 bool match;
4533
4534 /* keep sta info, bssid if matching */
4535 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4536 ieee80211_destroy_auth_data(sdata, match);
4537 }
4538
4539 /* prepare assoc data */
4540
4541 ifmgd->beacon_crc_valid = false;
4542
4543 assoc_data->wmm = bss->wmm_used &&
4544 (local->hw.queues >= IEEE80211_NUM_ACS);
4545 if (assoc_data->wmm) {
4546 /* try to check validity of WMM params IE */
4547 const struct cfg80211_bss_ies *ies;
4548 const u8 *wp, *start, *end;
4549
4550 rcu_read_lock();
4551 ies = rcu_dereference(req->bss->ies);
4552 start = ies->data;
4553 end = start + ies->len;
4554
4555 while (true) {
4556 wp = cfg80211_find_vendor_ie(
4557 WLAN_OUI_MICROSOFT,
4558 WLAN_OUI_TYPE_MICROSOFT_WMM,
4559 start, end - start);
4560 if (!wp)
4561 break;
4562 start = wp + wp[1] + 2;
4563 /* if this IE is too short, try the next */
4564 if (wp[1] <= 4)
4565 continue;
4566 /* if this IE is WMM params, we found what we wanted */
4567 if (wp[6] == 1)
4568 break;
4569 }
4570
4571 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4572 wp[1] - 2)) {
4573 assoc_data->wmm = false;
4574 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4575 }
4576 rcu_read_unlock();
4577 }
4578
4579 /*
4580 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4581 * We still associate in non-HT mode (11a/b/g) if any one of these
4582 * ciphers is configured as pairwise.
4583 * We can set this to true for non-11n hardware, that'll be checked
4584 * separately along with the peer capabilities.
4585 */
4586 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4587 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4588 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4589 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4590 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4591 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4592 netdev_info(sdata->dev,
4593 "disabling HT/VHT due to WEP/TKIP use\n");
4594 }
4595 }
4596
4597 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4598 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4599 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4600 }
4601
4602 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4603 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4604
4605 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4606 sband = local->hw.wiphy->bands[req->bss->channel->band];
4607 if (!sband->ht_cap.ht_supported ||
4608 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4609 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4610 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4611 if (!bss->wmm_used &&
4612 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4613 netdev_info(sdata->dev,
4614 "disabling HT as WMM/QoS is not supported by the AP\n");
4615 }
4616
4617 /* disable VHT if we don't support it or the AP doesn't use WMM */
4618 if (!sband->vht_cap.vht_supported ||
4619 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4620 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4621 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4622 if (!bss->wmm_used &&
4623 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4624 netdev_info(sdata->dev,
4625 "disabling VHT as WMM/QoS is not supported by the AP\n");
4626 }
4627
4628 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4629 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4630 sizeof(ifmgd->ht_capa_mask));
4631
4632 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4633 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4634 sizeof(ifmgd->vht_capa_mask));
4635
4636 if (req->ie && req->ie_len) {
4637 memcpy(assoc_data->ie, req->ie, req->ie_len);
4638 assoc_data->ie_len = req->ie_len;
4639 }
4640
4641 assoc_data->bss = req->bss;
4642
4643 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4644 if (ifmgd->powersave)
4645 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4646 else
4647 sdata->smps_mode = IEEE80211_SMPS_OFF;
4648 } else
4649 sdata->smps_mode = ifmgd->req_smps;
4650
4651 assoc_data->capability = req->bss->capability;
4652 assoc_data->supp_rates = bss->supp_rates;
4653 assoc_data->supp_rates_len = bss->supp_rates_len;
4654
4655 rcu_read_lock();
4656 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4657 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4658 assoc_data->ap_ht_param =
4659 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4660 else
4661 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4662 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4663 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4664 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4665 sizeof(struct ieee80211_vht_cap));
4666 else
4667 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4668 rcu_read_unlock();
4669
4670 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4671 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
4672 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4673 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4674
4675 if (bss->wmm_used && bss->uapsd_supported &&
4676 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4677 assoc_data->uapsd = true;
4678 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4679 } else {
4680 assoc_data->uapsd = false;
4681 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4682 }
4683
4684 if (req->prev_bssid)
4685 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4686
4687 if (req->use_mfp) {
4688 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4689 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4690 } else {
4691 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4692 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4693 }
4694
4695 if (req->flags & ASSOC_REQ_USE_RRM)
4696 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4697 else
4698 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4699
4700 if (req->crypto.control_port)
4701 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4702 else
4703 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4704
4705 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4706 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4707 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4708 sdata->vif.type);
4709
4710 /* kick off associate process */
4711
4712 ifmgd->assoc_data = assoc_data;
4713 ifmgd->dtim_period = 0;
4714 ifmgd->have_beacon = false;
4715
4716 err = ieee80211_prep_connection(sdata, req->bss, true);
4717 if (err)
4718 goto err_clear;
4719
4720 rcu_read_lock();
4721 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4722
4723 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4724 !beacon_ies) {
4725 /*
4726 * Wait up to one beacon interval ...
4727 * should this be more if we miss one?
4728 */
4729 sdata_info(sdata, "waiting for beacon from %pM\n",
4730 ifmgd->bssid);
4731 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4732 assoc_data->timeout_started = true;
4733 assoc_data->need_beacon = true;
4734 } else if (beacon_ies) {
4735 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4736 beacon_ies->data,
4737 beacon_ies->len);
4738 u8 dtim_count = 0;
4739
4740 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4741 const struct ieee80211_tim_ie *tim;
4742 tim = (void *)(tim_ie + 2);
4743 ifmgd->dtim_period = tim->dtim_period;
4744 dtim_count = tim->dtim_count;
4745 }
4746 ifmgd->have_beacon = true;
4747 assoc_data->timeout = jiffies;
4748 assoc_data->timeout_started = true;
4749
4750 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4751 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4752 sdata->vif.bss_conf.sync_device_ts =
4753 bss->device_ts_beacon;
4754 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4755 }
4756 } else {
4757 assoc_data->timeout = jiffies;
4758 assoc_data->timeout_started = true;
4759 }
4760 rcu_read_unlock();
4761
4762 run_again(sdata, assoc_data->timeout);
4763
4764 if (bss->corrupt_data) {
4765 char *corrupt_type = "data";
4766 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4767 if (bss->corrupt_data &
4768 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4769 corrupt_type = "beacon and probe response";
4770 else
4771 corrupt_type = "beacon";
4772 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4773 corrupt_type = "probe response";
4774 sdata_info(sdata, "associating with AP with corrupt %s\n",
4775 corrupt_type);
4776 }
4777
4778 return 0;
4779 err_clear:
4780 memset(ifmgd->bssid, 0, ETH_ALEN);
4781 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4782 ifmgd->assoc_data = NULL;
4783 err_free:
4784 kfree(assoc_data);
4785 return err;
4786 }
4787
4788 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4789 struct cfg80211_deauth_request *req)
4790 {
4791 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4792 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4793 bool tx = !req->local_state_change;
4794
4795 if (ifmgd->auth_data &&
4796 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4797 sdata_info(sdata,
4798 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4799 req->bssid, req->reason_code,
4800 ieee80211_get_reason_code_string(req->reason_code));
4801
4802 drv_mgd_prepare_tx(sdata->local, sdata);
4803 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4804 IEEE80211_STYPE_DEAUTH,
4805 req->reason_code, tx,
4806 frame_buf);
4807 ieee80211_destroy_auth_data(sdata, false);
4808 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4809 IEEE80211_DEAUTH_FRAME_LEN);
4810
4811 return 0;
4812 }
4813
4814 if (ifmgd->associated &&
4815 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4816 sdata_info(sdata,
4817 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4818 req->bssid, req->reason_code,
4819 ieee80211_get_reason_code_string(req->reason_code));
4820
4821 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4822 req->reason_code, tx, frame_buf);
4823 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4824 IEEE80211_DEAUTH_FRAME_LEN);
4825 return 0;
4826 }
4827
4828 return -ENOTCONN;
4829 }
4830
4831 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4832 struct cfg80211_disassoc_request *req)
4833 {
4834 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4835 u8 bssid[ETH_ALEN];
4836 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4837
4838 /*
4839 * cfg80211 should catch this ... but it's racy since
4840 * we can receive a disassoc frame, process it, hand it
4841 * to cfg80211 while that's in a locked section already
4842 * trying to tell us that the user wants to disconnect.
4843 */
4844 if (ifmgd->associated != req->bss)
4845 return -ENOLINK;
4846
4847 sdata_info(sdata,
4848 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4849 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4850
4851 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4852 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4853 req->reason_code, !req->local_state_change,
4854 frame_buf);
4855
4856 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4857 IEEE80211_DEAUTH_FRAME_LEN);
4858
4859 return 0;
4860 }
4861
4862 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4863 {
4864 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4865
4866 /*
4867 * Make sure some work items will not run after this,
4868 * they will not do anything but might not have been
4869 * cancelled when disconnecting.
4870 */
4871 cancel_work_sync(&ifmgd->monitor_work);
4872 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4873 cancel_work_sync(&ifmgd->request_smps_work);
4874 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4875 cancel_work_sync(&ifmgd->chswitch_work);
4876 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
4877
4878 sdata_lock(sdata);
4879 if (ifmgd->assoc_data) {
4880 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4881 ieee80211_destroy_assoc_data(sdata, false);
4882 cfg80211_assoc_timeout(sdata->dev, bss);
4883 }
4884 if (ifmgd->auth_data)
4885 ieee80211_destroy_auth_data(sdata, false);
4886 spin_lock_bh(&ifmgd->teardown_lock);
4887 if (ifmgd->teardown_skb) {
4888 kfree_skb(ifmgd->teardown_skb);
4889 ifmgd->teardown_skb = NULL;
4890 ifmgd->orig_teardown_skb = NULL;
4891 }
4892 spin_unlock_bh(&ifmgd->teardown_lock);
4893 del_timer_sync(&ifmgd->timer);
4894 sdata_unlock(sdata);
4895 }
4896
4897 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4898 enum nl80211_cqm_rssi_threshold_event rssi_event,
4899 gfp_t gfp)
4900 {
4901 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4902
4903 trace_api_cqm_rssi_notify(sdata, rssi_event);
4904
4905 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4906 }
4907 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
4908
4909 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
4910 {
4911 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4912
4913 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
4914
4915 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
4916 }
4917 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
Linux kernel - Deliverables
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