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Merge tag 'for-linus-20141015' of git://git.infradead.org/linux-mtd
[mirror_ubuntu-artful-kernel.git] / net / mac80211 / mlme.c
1 /*
2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
15 #include <linux/delay.h>
16 #include <linux/if_ether.h>
17 #include <linux/skbuff.h>
18 #include <linux/if_arp.h>
19 #include <linux/etherdevice.h>
20 #include <linux/moduleparam.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/pm_qos.h>
23 #include <linux/crc32.h>
24 #include <linux/slab.h>
25 #include <linux/export.h>
26 #include <net/mac80211.h>
27 #include <asm/unaligned.h>
28
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
31 #include "rate.h"
32 #include "led.h"
33
34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
37 #define IEEE80211_AUTH_MAX_TRIES 3
38 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
40 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
41 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
42 #define IEEE80211_ASSOC_MAX_TRIES 3
43
44 static int max_nullfunc_tries = 2;
45 module_param(max_nullfunc_tries, int, 0644);
46 MODULE_PARM_DESC(max_nullfunc_tries,
47 "Maximum nullfunc tx tries before disconnecting (reason 4).");
48
49 static int max_probe_tries = 5;
50 module_param(max_probe_tries, int, 0644);
51 MODULE_PARM_DESC(max_probe_tries,
52 "Maximum probe tries before disconnecting (reason 4).");
53
54 /*
55 * Beacon loss timeout is calculated as N frames times the
56 * advertised beacon interval. This may need to be somewhat
57 * higher than what hardware might detect to account for
58 * delays in the host processing frames. But since we also
59 * probe on beacon miss before declaring the connection lost
60 * default to what we want.
61 */
62 static int beacon_loss_count = 7;
63 module_param(beacon_loss_count, int, 0644);
64 MODULE_PARM_DESC(beacon_loss_count,
65 "Number of beacon intervals before we decide beacon was lost.");
66
67 /*
68 * Time the connection can be idle before we probe
69 * it to see if we can still talk to the AP.
70 */
71 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
72 /*
73 * Time we wait for a probe response after sending
74 * a probe request because of beacon loss or for
75 * checking the connection still works.
76 */
77 static int probe_wait_ms = 500;
78 module_param(probe_wait_ms, int, 0644);
79 MODULE_PARM_DESC(probe_wait_ms,
80 "Maximum time(ms) to wait for probe response"
81 " before disconnecting (reason 4).");
82
83 /*
84 * Weight given to the latest Beacon frame when calculating average signal
85 * strength for Beacon frames received in the current BSS. This must be
86 * between 1 and 15.
87 */
88 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
89
90 /*
91 * How many Beacon frames need to have been used in average signal strength
92 * before starting to indicate signal change events.
93 */
94 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
95
96 /*
97 * We can have multiple work items (and connection probing)
98 * scheduling this timer, but we need to take care to only
99 * reschedule it when it should fire _earlier_ than it was
100 * asked for before, or if it's not pending right now. This
101 * function ensures that. Note that it then is required to
102 * run this function for all timeouts after the first one
103 * has happened -- the work that runs from this timer will
104 * do that.
105 */
106 static void run_again(struct ieee80211_sub_if_data *sdata,
107 unsigned long timeout)
108 {
109 sdata_assert_lock(sdata);
110
111 if (!timer_pending(&sdata->u.mgd.timer) ||
112 time_before(timeout, sdata->u.mgd.timer.expires))
113 mod_timer(&sdata->u.mgd.timer, timeout);
114 }
115
116 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
117 {
118 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
119 return;
120
121 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
122 return;
123
124 mod_timer(&sdata->u.mgd.bcn_mon_timer,
125 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
126 }
127
128 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
129 {
130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
131
132 if (unlikely(!sdata->u.mgd.associated))
133 return;
134
135 ifmgd->probe_send_count = 0;
136
137 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
138 return;
139
140 mod_timer(&sdata->u.mgd.conn_mon_timer,
141 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
142 }
143
144 static int ecw2cw(int ecw)
145 {
146 return (1 << ecw) - 1;
147 }
148
149 static u32
150 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
151 struct ieee80211_supported_band *sband,
152 struct ieee80211_channel *channel,
153 const struct ieee80211_ht_cap *ht_cap,
154 const struct ieee80211_ht_operation *ht_oper,
155 const struct ieee80211_vht_operation *vht_oper,
156 struct cfg80211_chan_def *chandef, bool tracking)
157 {
158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
159 struct cfg80211_chan_def vht_chandef;
160 u32 ht_cfreq, ret;
161
162 chandef->chan = channel;
163 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
164 chandef->center_freq1 = channel->center_freq;
165 chandef->center_freq2 = 0;
166
167 if (!ht_cap || !ht_oper || !sband->ht_cap.ht_supported) {
168 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
169 goto out;
170 }
171
172 chandef->width = NL80211_CHAN_WIDTH_20;
173
174 if (!(ht_cap->cap_info &
175 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
176 ret = IEEE80211_STA_DISABLE_40MHZ;
177 goto out;
178 }
179
180 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
181 channel->band);
182 /* check that channel matches the right operating channel */
183 if (!tracking && channel->center_freq != ht_cfreq) {
184 /*
185 * It's possible that some APs are confused here;
186 * Netgear WNDR3700 sometimes reports 4 higher than
187 * the actual channel in association responses, but
188 * since we look at probe response/beacon data here
189 * it should be OK.
190 */
191 sdata_info(sdata,
192 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
193 channel->center_freq, ht_cfreq,
194 ht_oper->primary_chan, channel->band);
195 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
196 goto out;
197 }
198
199 /* check 40 MHz support, if we have it */
200 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
201 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
202 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
203 chandef->width = NL80211_CHAN_WIDTH_40;
204 chandef->center_freq1 += 10;
205 break;
206 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
207 chandef->width = NL80211_CHAN_WIDTH_40;
208 chandef->center_freq1 -= 10;
209 break;
210 }
211 } else {
212 /* 40 MHz (and 80 MHz) must be supported for VHT */
213 ret = IEEE80211_STA_DISABLE_VHT;
214 /* also mark 40 MHz disabled */
215 ret |= IEEE80211_STA_DISABLE_40MHZ;
216 goto out;
217 }
218
219 if (!vht_oper || !sband->vht_cap.vht_supported) {
220 ret = IEEE80211_STA_DISABLE_VHT;
221 goto out;
222 }
223
224 vht_chandef.chan = channel;
225 vht_chandef.center_freq1 =
226 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
227 channel->band);
228 vht_chandef.center_freq2 = 0;
229
230 switch (vht_oper->chan_width) {
231 case IEEE80211_VHT_CHANWIDTH_USE_HT:
232 vht_chandef.width = chandef->width;
233 vht_chandef.center_freq1 = chandef->center_freq1;
234 break;
235 case IEEE80211_VHT_CHANWIDTH_80MHZ:
236 vht_chandef.width = NL80211_CHAN_WIDTH_80;
237 break;
238 case IEEE80211_VHT_CHANWIDTH_160MHZ:
239 vht_chandef.width = NL80211_CHAN_WIDTH_160;
240 break;
241 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
242 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
243 vht_chandef.center_freq2 =
244 ieee80211_channel_to_frequency(
245 vht_oper->center_freq_seg2_idx,
246 channel->band);
247 break;
248 default:
249 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
250 sdata_info(sdata,
251 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
252 vht_oper->chan_width);
253 ret = IEEE80211_STA_DISABLE_VHT;
254 goto out;
255 }
256
257 if (!cfg80211_chandef_valid(&vht_chandef)) {
258 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
259 sdata_info(sdata,
260 "AP VHT information is invalid, disable VHT\n");
261 ret = IEEE80211_STA_DISABLE_VHT;
262 goto out;
263 }
264
265 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
266 ret = 0;
267 goto out;
268 }
269
270 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
271 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
272 sdata_info(sdata,
273 "AP VHT information doesn't match HT, disable VHT\n");
274 ret = IEEE80211_STA_DISABLE_VHT;
275 goto out;
276 }
277
278 *chandef = vht_chandef;
279
280 ret = 0;
281
282 out:
283 /*
284 * When tracking the current AP, don't do any further checks if the
285 * new chandef is identical to the one we're currently using for the
286 * connection. This keeps us from playing ping-pong with regulatory,
287 * without it the following can happen (for example):
288 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
289 * - AP advertises regdom US
290 * - CRDA loads regdom US with 80 MHz prohibited (old database)
291 * - the code below detects an unsupported channel, downgrades, and
292 * we disconnect from the AP in the caller
293 * - disconnect causes CRDA to reload world regdomain and the game
294 * starts anew.
295 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
296 *
297 * It seems possible that there are still scenarios with CSA or real
298 * bandwidth changes where a this could happen, but those cases are
299 * less common and wouldn't completely prevent using the AP.
300 */
301 if (tracking &&
302 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
303 return ret;
304
305 /* don't print the message below for VHT mismatch if VHT is disabled */
306 if (ret & IEEE80211_STA_DISABLE_VHT)
307 vht_chandef = *chandef;
308
309 /*
310 * Ignore the DISABLED flag when we're already connected and only
311 * tracking the APs beacon for bandwidth changes - otherwise we
312 * might get disconnected here if we connect to an AP, update our
313 * regulatory information based on the AP's country IE and the
314 * information we have is wrong/outdated and disables the channel
315 * that we're actually using for the connection to the AP.
316 */
317 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
318 tracking ? 0 :
319 IEEE80211_CHAN_DISABLED)) {
320 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
321 ret = IEEE80211_STA_DISABLE_HT |
322 IEEE80211_STA_DISABLE_VHT;
323 break;
324 }
325
326 ret |= ieee80211_chandef_downgrade(chandef);
327 }
328
329 if (chandef->width != vht_chandef.width && !tracking)
330 sdata_info(sdata,
331 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
332
333 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
334 return ret;
335 }
336
337 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
338 struct sta_info *sta,
339 const struct ieee80211_ht_cap *ht_cap,
340 const struct ieee80211_ht_operation *ht_oper,
341 const struct ieee80211_vht_operation *vht_oper,
342 const u8 *bssid, u32 *changed)
343 {
344 struct ieee80211_local *local = sdata->local;
345 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
346 struct ieee80211_supported_band *sband;
347 struct ieee80211_channel *chan;
348 struct cfg80211_chan_def chandef;
349 u16 ht_opmode;
350 u32 flags;
351 enum ieee80211_sta_rx_bandwidth new_sta_bw;
352 int ret;
353
354 /* if HT was/is disabled, don't track any bandwidth changes */
355 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
356 return 0;
357
358 /* don't check VHT if we associated as non-VHT station */
359 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
360 vht_oper = NULL;
361
362 if (WARN_ON_ONCE(!sta))
363 return -EINVAL;
364
365 /*
366 * if bss configuration changed store the new one -
367 * this may be applicable even if channel is identical
368 */
369 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
370 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
371 *changed |= BSS_CHANGED_HT;
372 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
373 }
374
375 chan = sdata->vif.bss_conf.chandef.chan;
376 sband = local->hw.wiphy->bands[chan->band];
377
378 /* calculate new channel (type) based on HT/VHT operation IEs */
379 flags = ieee80211_determine_chantype(sdata, sband, chan,
380 ht_cap, ht_oper, vht_oper,
381 &chandef, true);
382
383 /*
384 * Downgrade the new channel if we associated with restricted
385 * capabilities. For example, if we associated as a 20 MHz STA
386 * to a 40 MHz AP (due to regulatory, capabilities or config
387 * reasons) then switching to a 40 MHz channel now won't do us
388 * any good -- we couldn't use it with the AP.
389 */
390 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
391 chandef.width == NL80211_CHAN_WIDTH_80P80)
392 flags |= ieee80211_chandef_downgrade(&chandef);
393 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
394 chandef.width == NL80211_CHAN_WIDTH_160)
395 flags |= ieee80211_chandef_downgrade(&chandef);
396 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
397 chandef.width > NL80211_CHAN_WIDTH_20)
398 flags |= ieee80211_chandef_downgrade(&chandef);
399
400 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
401 return 0;
402
403 sdata_info(sdata,
404 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
405 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
406 chandef.center_freq1, chandef.center_freq2);
407
408 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
409 IEEE80211_STA_DISABLE_VHT |
410 IEEE80211_STA_DISABLE_40MHZ |
411 IEEE80211_STA_DISABLE_80P80MHZ |
412 IEEE80211_STA_DISABLE_160MHZ)) ||
413 !cfg80211_chandef_valid(&chandef)) {
414 sdata_info(sdata,
415 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
416 ifmgd->bssid);
417 return -EINVAL;
418 }
419
420 switch (chandef.width) {
421 case NL80211_CHAN_WIDTH_20_NOHT:
422 case NL80211_CHAN_WIDTH_20:
423 new_sta_bw = IEEE80211_STA_RX_BW_20;
424 break;
425 case NL80211_CHAN_WIDTH_40:
426 new_sta_bw = IEEE80211_STA_RX_BW_40;
427 break;
428 case NL80211_CHAN_WIDTH_80:
429 new_sta_bw = IEEE80211_STA_RX_BW_80;
430 break;
431 case NL80211_CHAN_WIDTH_80P80:
432 case NL80211_CHAN_WIDTH_160:
433 new_sta_bw = IEEE80211_STA_RX_BW_160;
434 break;
435 default:
436 return -EINVAL;
437 }
438
439 if (new_sta_bw > sta->cur_max_bandwidth)
440 new_sta_bw = sta->cur_max_bandwidth;
441
442 if (new_sta_bw < sta->sta.bandwidth) {
443 sta->sta.bandwidth = new_sta_bw;
444 rate_control_rate_update(local, sband, sta,
445 IEEE80211_RC_BW_CHANGED);
446 }
447
448 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
449 if (ret) {
450 sdata_info(sdata,
451 "AP %pM changed bandwidth to incompatible one - disconnect\n",
452 ifmgd->bssid);
453 return ret;
454 }
455
456 if (new_sta_bw > sta->sta.bandwidth) {
457 sta->sta.bandwidth = new_sta_bw;
458 rate_control_rate_update(local, sband, sta,
459 IEEE80211_RC_BW_CHANGED);
460 }
461
462 return 0;
463 }
464
465 /* frame sending functions */
466
467 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
468 struct sk_buff *skb, u8 ap_ht_param,
469 struct ieee80211_supported_band *sband,
470 struct ieee80211_channel *channel,
471 enum ieee80211_smps_mode smps)
472 {
473 u8 *pos;
474 u32 flags = channel->flags;
475 u16 cap;
476 struct ieee80211_sta_ht_cap ht_cap;
477
478 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
479
480 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
481 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
482
483 /* determine capability flags */
484 cap = ht_cap.cap;
485
486 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
487 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
488 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
489 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
490 cap &= ~IEEE80211_HT_CAP_SGI_40;
491 }
492 break;
493 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
494 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
495 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
496 cap &= ~IEEE80211_HT_CAP_SGI_40;
497 }
498 break;
499 }
500
501 /*
502 * If 40 MHz was disabled associate as though we weren't
503 * capable of 40 MHz -- some broken APs will never fall
504 * back to trying to transmit in 20 MHz.
505 */
506 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
507 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
508 cap &= ~IEEE80211_HT_CAP_SGI_40;
509 }
510
511 /* set SM PS mode properly */
512 cap &= ~IEEE80211_HT_CAP_SM_PS;
513 switch (smps) {
514 case IEEE80211_SMPS_AUTOMATIC:
515 case IEEE80211_SMPS_NUM_MODES:
516 WARN_ON(1);
517 case IEEE80211_SMPS_OFF:
518 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
519 IEEE80211_HT_CAP_SM_PS_SHIFT;
520 break;
521 case IEEE80211_SMPS_STATIC:
522 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
523 IEEE80211_HT_CAP_SM_PS_SHIFT;
524 break;
525 case IEEE80211_SMPS_DYNAMIC:
526 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
527 IEEE80211_HT_CAP_SM_PS_SHIFT;
528 break;
529 }
530
531 /* reserve and fill IE */
532 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
533 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
534 }
535
536 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
537 struct sk_buff *skb,
538 struct ieee80211_supported_band *sband,
539 struct ieee80211_vht_cap *ap_vht_cap)
540 {
541 u8 *pos;
542 u32 cap;
543 struct ieee80211_sta_vht_cap vht_cap;
544 u32 mask, ap_bf_sts, our_bf_sts;
545
546 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
547
548 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
549 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
550
551 /* determine capability flags */
552 cap = vht_cap.cap;
553
554 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
555 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
556 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
557 }
558
559 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
560 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
561 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
562 }
563
564 /*
565 * Some APs apparently get confused if our capabilities are better
566 * than theirs, so restrict what we advertise in the assoc request.
567 */
568 if (!(ap_vht_cap->vht_cap_info &
569 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
570 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
571
572 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
573
574 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
575 our_bf_sts = cap & mask;
576
577 if (ap_bf_sts < our_bf_sts) {
578 cap &= ~mask;
579 cap |= ap_bf_sts;
580 }
581
582 /* reserve and fill IE */
583 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
584 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
585 }
586
587 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
588 {
589 struct ieee80211_local *local = sdata->local;
590 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
591 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
592 struct sk_buff *skb;
593 struct ieee80211_mgmt *mgmt;
594 u8 *pos, qos_info;
595 size_t offset = 0, noffset;
596 int i, count, rates_len, supp_rates_len, shift;
597 u16 capab;
598 struct ieee80211_supported_band *sband;
599 struct ieee80211_chanctx_conf *chanctx_conf;
600 struct ieee80211_channel *chan;
601 u32 rate_flags, rates = 0;
602
603 sdata_assert_lock(sdata);
604
605 rcu_read_lock();
606 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
607 if (WARN_ON(!chanctx_conf)) {
608 rcu_read_unlock();
609 return;
610 }
611 chan = chanctx_conf->def.chan;
612 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
613 rcu_read_unlock();
614 sband = local->hw.wiphy->bands[chan->band];
615 shift = ieee80211_vif_get_shift(&sdata->vif);
616
617 if (assoc_data->supp_rates_len) {
618 /*
619 * Get all rates supported by the device and the AP as
620 * some APs don't like getting a superset of their rates
621 * in the association request (e.g. D-Link DAP 1353 in
622 * b-only mode)...
623 */
624 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
625 assoc_data->supp_rates,
626 assoc_data->supp_rates_len,
627 &rates);
628 } else {
629 /*
630 * In case AP not provide any supported rates information
631 * before association, we send information element(s) with
632 * all rates that we support.
633 */
634 rates_len = 0;
635 for (i = 0; i < sband->n_bitrates; i++) {
636 if ((rate_flags & sband->bitrates[i].flags)
637 != rate_flags)
638 continue;
639 rates |= BIT(i);
640 rates_len++;
641 }
642 }
643
644 skb = alloc_skb(local->hw.extra_tx_headroom +
645 sizeof(*mgmt) + /* bit too much but doesn't matter */
646 2 + assoc_data->ssid_len + /* SSID */
647 4 + rates_len + /* (extended) rates */
648 4 + /* power capability */
649 2 + 2 * sband->n_channels + /* supported channels */
650 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
651 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
652 assoc_data->ie_len + /* extra IEs */
653 9, /* WMM */
654 GFP_KERNEL);
655 if (!skb)
656 return;
657
658 skb_reserve(skb, local->hw.extra_tx_headroom);
659
660 capab = WLAN_CAPABILITY_ESS;
661
662 if (sband->band == IEEE80211_BAND_2GHZ) {
663 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
664 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
665 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
666 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
667 }
668
669 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
670 capab |= WLAN_CAPABILITY_PRIVACY;
671
672 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
673 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
674 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
675
676 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
677 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
678
679 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
680 memset(mgmt, 0, 24);
681 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
682 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
683 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
684
685 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
686 skb_put(skb, 10);
687 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
688 IEEE80211_STYPE_REASSOC_REQ);
689 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
690 mgmt->u.reassoc_req.listen_interval =
691 cpu_to_le16(local->hw.conf.listen_interval);
692 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
693 ETH_ALEN);
694 } else {
695 skb_put(skb, 4);
696 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
697 IEEE80211_STYPE_ASSOC_REQ);
698 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
699 mgmt->u.assoc_req.listen_interval =
700 cpu_to_le16(local->hw.conf.listen_interval);
701 }
702
703 /* SSID */
704 pos = skb_put(skb, 2 + assoc_data->ssid_len);
705 *pos++ = WLAN_EID_SSID;
706 *pos++ = assoc_data->ssid_len;
707 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
708
709 /* add all rates which were marked to be used above */
710 supp_rates_len = rates_len;
711 if (supp_rates_len > 8)
712 supp_rates_len = 8;
713
714 pos = skb_put(skb, supp_rates_len + 2);
715 *pos++ = WLAN_EID_SUPP_RATES;
716 *pos++ = supp_rates_len;
717
718 count = 0;
719 for (i = 0; i < sband->n_bitrates; i++) {
720 if (BIT(i) & rates) {
721 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
722 5 * (1 << shift));
723 *pos++ = (u8) rate;
724 if (++count == 8)
725 break;
726 }
727 }
728
729 if (rates_len > count) {
730 pos = skb_put(skb, rates_len - count + 2);
731 *pos++ = WLAN_EID_EXT_SUPP_RATES;
732 *pos++ = rates_len - count;
733
734 for (i++; i < sband->n_bitrates; i++) {
735 if (BIT(i) & rates) {
736 int rate;
737 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
738 5 * (1 << shift));
739 *pos++ = (u8) rate;
740 }
741 }
742 }
743
744 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
745 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
746 pos = skb_put(skb, 4);
747 *pos++ = WLAN_EID_PWR_CAPABILITY;
748 *pos++ = 2;
749 *pos++ = 0; /* min tx power */
750 /* max tx power */
751 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
752 }
753
754 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
755 /* TODO: get this in reg domain format */
756 pos = skb_put(skb, 2 * sband->n_channels + 2);
757 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
758 *pos++ = 2 * sband->n_channels;
759 for (i = 0; i < sband->n_channels; i++) {
760 *pos++ = ieee80211_frequency_to_channel(
761 sband->channels[i].center_freq);
762 *pos++ = 1; /* one channel in the subband*/
763 }
764 }
765
766 /* if present, add any custom IEs that go before HT */
767 if (assoc_data->ie_len) {
768 static const u8 before_ht[] = {
769 WLAN_EID_SSID,
770 WLAN_EID_SUPP_RATES,
771 WLAN_EID_EXT_SUPP_RATES,
772 WLAN_EID_PWR_CAPABILITY,
773 WLAN_EID_SUPPORTED_CHANNELS,
774 WLAN_EID_RSN,
775 WLAN_EID_QOS_CAPA,
776 WLAN_EID_RRM_ENABLED_CAPABILITIES,
777 WLAN_EID_MOBILITY_DOMAIN,
778 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
779 };
780 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
781 before_ht, ARRAY_SIZE(before_ht),
782 offset);
783 pos = skb_put(skb, noffset - offset);
784 memcpy(pos, assoc_data->ie + offset, noffset - offset);
785 offset = noffset;
786 }
787
788 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
789 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
790 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
791
792 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
793 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
794 sband, chan, sdata->smps_mode);
795
796 /* if present, add any custom IEs that go before VHT */
797 if (assoc_data->ie_len) {
798 static const u8 before_vht[] = {
799 WLAN_EID_SSID,
800 WLAN_EID_SUPP_RATES,
801 WLAN_EID_EXT_SUPP_RATES,
802 WLAN_EID_PWR_CAPABILITY,
803 WLAN_EID_SUPPORTED_CHANNELS,
804 WLAN_EID_RSN,
805 WLAN_EID_QOS_CAPA,
806 WLAN_EID_RRM_ENABLED_CAPABILITIES,
807 WLAN_EID_MOBILITY_DOMAIN,
808 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
809 WLAN_EID_HT_CAPABILITY,
810 WLAN_EID_BSS_COEX_2040,
811 WLAN_EID_EXT_CAPABILITY,
812 WLAN_EID_QOS_TRAFFIC_CAPA,
813 WLAN_EID_TIM_BCAST_REQ,
814 WLAN_EID_INTERWORKING,
815 };
816 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
817 before_vht, ARRAY_SIZE(before_vht),
818 offset);
819 pos = skb_put(skb, noffset - offset);
820 memcpy(pos, assoc_data->ie + offset, noffset - offset);
821 offset = noffset;
822 }
823
824 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
825 ieee80211_add_vht_ie(sdata, skb, sband,
826 &assoc_data->ap_vht_cap);
827
828 /* if present, add any custom non-vendor IEs that go after HT */
829 if (assoc_data->ie_len) {
830 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
831 assoc_data->ie_len,
832 offset);
833 pos = skb_put(skb, noffset - offset);
834 memcpy(pos, assoc_data->ie + offset, noffset - offset);
835 offset = noffset;
836 }
837
838 if (assoc_data->wmm) {
839 if (assoc_data->uapsd) {
840 qos_info = ifmgd->uapsd_queues;
841 qos_info |= (ifmgd->uapsd_max_sp_len <<
842 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
843 } else {
844 qos_info = 0;
845 }
846
847 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
848 }
849
850 /* add any remaining custom (i.e. vendor specific here) IEs */
851 if (assoc_data->ie_len) {
852 noffset = assoc_data->ie_len;
853 pos = skb_put(skb, noffset - offset);
854 memcpy(pos, assoc_data->ie + offset, noffset - offset);
855 }
856
857 drv_mgd_prepare_tx(local, sdata);
858
859 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
860 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
861 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
862 IEEE80211_TX_INTFL_MLME_CONN_TX;
863 ieee80211_tx_skb(sdata, skb);
864 }
865
866 void ieee80211_send_pspoll(struct ieee80211_local *local,
867 struct ieee80211_sub_if_data *sdata)
868 {
869 struct ieee80211_pspoll *pspoll;
870 struct sk_buff *skb;
871
872 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
873 if (!skb)
874 return;
875
876 pspoll = (struct ieee80211_pspoll *) skb->data;
877 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
878
879 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
880 ieee80211_tx_skb(sdata, skb);
881 }
882
883 void ieee80211_send_nullfunc(struct ieee80211_local *local,
884 struct ieee80211_sub_if_data *sdata,
885 int powersave)
886 {
887 struct sk_buff *skb;
888 struct ieee80211_hdr_3addr *nullfunc;
889 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
890
891 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
892 if (!skb)
893 return;
894
895 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
896 if (powersave)
897 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
898
899 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
900 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
901
902 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
903 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
904
905 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
906 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
907
908 ieee80211_tx_skb(sdata, skb);
909 }
910
911 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
912 struct ieee80211_sub_if_data *sdata)
913 {
914 struct sk_buff *skb;
915 struct ieee80211_hdr *nullfunc;
916 __le16 fc;
917
918 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
919 return;
920
921 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
922 if (!skb)
923 return;
924
925 skb_reserve(skb, local->hw.extra_tx_headroom);
926
927 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
928 memset(nullfunc, 0, 30);
929 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
930 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
931 nullfunc->frame_control = fc;
932 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
933 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
934 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
935 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
936
937 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
938 ieee80211_tx_skb(sdata, skb);
939 }
940
941 /* spectrum management related things */
942 static void ieee80211_chswitch_work(struct work_struct *work)
943 {
944 struct ieee80211_sub_if_data *sdata =
945 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
946 struct ieee80211_local *local = sdata->local;
947 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
948 int ret;
949
950 if (!ieee80211_sdata_running(sdata))
951 return;
952
953 sdata_lock(sdata);
954 mutex_lock(&local->mtx);
955 mutex_lock(&local->chanctx_mtx);
956
957 if (!ifmgd->associated)
958 goto out;
959
960 if (!sdata->vif.csa_active)
961 goto out;
962
963 /*
964 * using reservation isn't immediate as it may be deferred until later
965 * with multi-vif. once reservation is complete it will re-schedule the
966 * work with no reserved_chanctx so verify chandef to check if it
967 * completed successfully
968 */
969
970 if (sdata->reserved_chanctx) {
971 /*
972 * with multi-vif csa driver may call ieee80211_csa_finish()
973 * many times while waiting for other interfaces to use their
974 * reservations
975 */
976 if (sdata->reserved_ready)
977 goto out;
978
979 ret = ieee80211_vif_use_reserved_context(sdata);
980 if (ret) {
981 sdata_info(sdata,
982 "failed to use reserved channel context, disconnecting (err=%d)\n",
983 ret);
984 ieee80211_queue_work(&sdata->local->hw,
985 &ifmgd->csa_connection_drop_work);
986 goto out;
987 }
988
989 goto out;
990 }
991
992 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
993 &sdata->csa_chandef)) {
994 sdata_info(sdata,
995 "failed to finalize channel switch, disconnecting\n");
996 ieee80211_queue_work(&sdata->local->hw,
997 &ifmgd->csa_connection_drop_work);
998 goto out;
999 }
1000
1001 /* XXX: shouldn't really modify cfg80211-owned data! */
1002 ifmgd->associated->channel = sdata->csa_chandef.chan;
1003
1004 sdata->vif.csa_active = false;
1005
1006 /* XXX: wait for a beacon first? */
1007 if (sdata->csa_block_tx) {
1008 ieee80211_wake_vif_queues(local, sdata,
1009 IEEE80211_QUEUE_STOP_REASON_CSA);
1010 sdata->csa_block_tx = false;
1011 }
1012
1013 ieee80211_sta_reset_beacon_monitor(sdata);
1014 ieee80211_sta_reset_conn_monitor(sdata);
1015
1016 out:
1017 mutex_unlock(&local->chanctx_mtx);
1018 mutex_unlock(&local->mtx);
1019 sdata_unlock(sdata);
1020 }
1021
1022 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1023 {
1024 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1026
1027 trace_api_chswitch_done(sdata, success);
1028 if (!success) {
1029 sdata_info(sdata,
1030 "driver channel switch failed, disconnecting\n");
1031 ieee80211_queue_work(&sdata->local->hw,
1032 &ifmgd->csa_connection_drop_work);
1033 } else {
1034 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1035 }
1036 }
1037 EXPORT_SYMBOL(ieee80211_chswitch_done);
1038
1039 static void ieee80211_chswitch_timer(unsigned long data)
1040 {
1041 struct ieee80211_sub_if_data *sdata =
1042 (struct ieee80211_sub_if_data *) data;
1043
1044 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1045 }
1046
1047 static void
1048 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1049 u64 timestamp, struct ieee802_11_elems *elems,
1050 bool beacon)
1051 {
1052 struct ieee80211_local *local = sdata->local;
1053 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1054 struct cfg80211_bss *cbss = ifmgd->associated;
1055 struct ieee80211_chanctx_conf *conf;
1056 struct ieee80211_chanctx *chanctx;
1057 enum ieee80211_band current_band;
1058 struct ieee80211_csa_ie csa_ie;
1059 int res;
1060
1061 sdata_assert_lock(sdata);
1062
1063 if (!cbss)
1064 return;
1065
1066 if (local->scanning)
1067 return;
1068
1069 /* disregard subsequent announcements if we are already processing */
1070 if (sdata->vif.csa_active)
1071 return;
1072
1073 current_band = cbss->channel->band;
1074 memset(&csa_ie, 0, sizeof(csa_ie));
1075 res = ieee80211_parse_ch_switch_ie(sdata, elems, beacon, current_band,
1076 ifmgd->flags,
1077 ifmgd->associated->bssid, &csa_ie);
1078 if (res < 0)
1079 ieee80211_queue_work(&local->hw,
1080 &ifmgd->csa_connection_drop_work);
1081 if (res)
1082 return;
1083
1084 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1085 IEEE80211_CHAN_DISABLED)) {
1086 sdata_info(sdata,
1087 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1088 ifmgd->associated->bssid,
1089 csa_ie.chandef.chan->center_freq,
1090 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1091 csa_ie.chandef.center_freq2);
1092 ieee80211_queue_work(&local->hw,
1093 &ifmgd->csa_connection_drop_work);
1094 return;
1095 }
1096
1097 mutex_lock(&local->mtx);
1098 mutex_lock(&local->chanctx_mtx);
1099 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1100 lockdep_is_held(&local->chanctx_mtx));
1101 if (!conf) {
1102 sdata_info(sdata,
1103 "no channel context assigned to vif?, disconnecting\n");
1104 ieee80211_queue_work(&local->hw,
1105 &ifmgd->csa_connection_drop_work);
1106 mutex_unlock(&local->chanctx_mtx);
1107 mutex_unlock(&local->mtx);
1108 return;
1109 }
1110
1111 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1112
1113 if (local->use_chanctx) {
1114 u32 num_chanctx = 0;
1115 list_for_each_entry(chanctx, &local->chanctx_list, list)
1116 num_chanctx++;
1117
1118 if (num_chanctx > 1 ||
1119 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1120 sdata_info(sdata,
1121 "not handling chan-switch with channel contexts\n");
1122 ieee80211_queue_work(&local->hw,
1123 &ifmgd->csa_connection_drop_work);
1124 mutex_unlock(&local->chanctx_mtx);
1125 mutex_unlock(&local->mtx);
1126 return;
1127 }
1128 }
1129
1130 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1131 chanctx->mode, false);
1132 if (res) {
1133 sdata_info(sdata,
1134 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1135 res);
1136 ieee80211_queue_work(&local->hw,
1137 &ifmgd->csa_connection_drop_work);
1138 mutex_unlock(&local->chanctx_mtx);
1139 mutex_unlock(&local->mtx);
1140 return;
1141 }
1142 mutex_unlock(&local->chanctx_mtx);
1143
1144 sdata->vif.csa_active = true;
1145 sdata->csa_chandef = csa_ie.chandef;
1146 sdata->csa_block_tx = csa_ie.mode;
1147
1148 if (sdata->csa_block_tx)
1149 ieee80211_stop_vif_queues(local, sdata,
1150 IEEE80211_QUEUE_STOP_REASON_CSA);
1151 mutex_unlock(&local->mtx);
1152
1153 if (local->ops->channel_switch) {
1154 /* use driver's channel switch callback */
1155 struct ieee80211_channel_switch ch_switch = {
1156 .timestamp = timestamp,
1157 .block_tx = csa_ie.mode,
1158 .chandef = csa_ie.chandef,
1159 .count = csa_ie.count,
1160 };
1161
1162 drv_channel_switch(local, &ch_switch);
1163 return;
1164 }
1165
1166 /* channel switch handled in software */
1167 if (csa_ie.count <= 1)
1168 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1169 else
1170 mod_timer(&ifmgd->chswitch_timer,
1171 TU_TO_EXP_TIME(csa_ie.count * cbss->beacon_interval));
1172 }
1173
1174 static bool
1175 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1176 struct ieee80211_channel *channel,
1177 const u8 *country_ie, u8 country_ie_len,
1178 const u8 *pwr_constr_elem,
1179 int *chan_pwr, int *pwr_reduction)
1180 {
1181 struct ieee80211_country_ie_triplet *triplet;
1182 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1183 int i, chan_increment;
1184 bool have_chan_pwr = false;
1185
1186 /* Invalid IE */
1187 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1188 return false;
1189
1190 triplet = (void *)(country_ie + 3);
1191 country_ie_len -= 3;
1192
1193 switch (channel->band) {
1194 default:
1195 WARN_ON_ONCE(1);
1196 /* fall through */
1197 case IEEE80211_BAND_2GHZ:
1198 case IEEE80211_BAND_60GHZ:
1199 chan_increment = 1;
1200 break;
1201 case IEEE80211_BAND_5GHZ:
1202 chan_increment = 4;
1203 break;
1204 }
1205
1206 /* find channel */
1207 while (country_ie_len >= 3) {
1208 u8 first_channel = triplet->chans.first_channel;
1209
1210 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1211 goto next;
1212
1213 for (i = 0; i < triplet->chans.num_channels; i++) {
1214 if (first_channel + i * chan_increment == chan) {
1215 have_chan_pwr = true;
1216 *chan_pwr = triplet->chans.max_power;
1217 break;
1218 }
1219 }
1220 if (have_chan_pwr)
1221 break;
1222
1223 next:
1224 triplet++;
1225 country_ie_len -= 3;
1226 }
1227
1228 if (have_chan_pwr)
1229 *pwr_reduction = *pwr_constr_elem;
1230 return have_chan_pwr;
1231 }
1232
1233 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1234 struct ieee80211_channel *channel,
1235 const u8 *cisco_dtpc_ie,
1236 int *pwr_level)
1237 {
1238 /* From practical testing, the first data byte of the DTPC element
1239 * seems to contain the requested dBm level, and the CLI on Cisco
1240 * APs clearly state the range is -127 to 127 dBm, which indicates
1241 * a signed byte, although it seemingly never actually goes negative.
1242 * The other byte seems to always be zero.
1243 */
1244 *pwr_level = (__s8)cisco_dtpc_ie[4];
1245 }
1246
1247 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1248 struct ieee80211_channel *channel,
1249 struct ieee80211_mgmt *mgmt,
1250 const u8 *country_ie, u8 country_ie_len,
1251 const u8 *pwr_constr_ie,
1252 const u8 *cisco_dtpc_ie)
1253 {
1254 bool has_80211h_pwr = false, has_cisco_pwr = false;
1255 int chan_pwr = 0, pwr_reduction_80211h = 0;
1256 int pwr_level_cisco, pwr_level_80211h;
1257 int new_ap_level;
1258
1259 if (country_ie && pwr_constr_ie &&
1260 mgmt->u.probe_resp.capab_info &
1261 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT)) {
1262 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1263 sdata, channel, country_ie, country_ie_len,
1264 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1265 pwr_level_80211h =
1266 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1267 }
1268
1269 if (cisco_dtpc_ie) {
1270 ieee80211_find_cisco_dtpc(
1271 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1272 has_cisco_pwr = true;
1273 }
1274
1275 if (!has_80211h_pwr && !has_cisco_pwr)
1276 return 0;
1277
1278 /* If we have both 802.11h and Cisco DTPC, apply both limits
1279 * by picking the smallest of the two power levels advertised.
1280 */
1281 if (has_80211h_pwr &&
1282 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1283 sdata_info(sdata,
1284 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1285 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1286 sdata->u.mgd.bssid);
1287 new_ap_level = pwr_level_80211h;
1288 } else { /* has_cisco_pwr is always true here. */
1289 sdata_info(sdata,
1290 "Limiting TX power to %d dBm as advertised by %pM\n",
1291 pwr_level_cisco, sdata->u.mgd.bssid);
1292 new_ap_level = pwr_level_cisco;
1293 }
1294
1295 if (sdata->ap_power_level == new_ap_level)
1296 return 0;
1297
1298 sdata->ap_power_level = new_ap_level;
1299 if (__ieee80211_recalc_txpower(sdata))
1300 return BSS_CHANGED_TXPOWER;
1301 return 0;
1302 }
1303
1304 /* powersave */
1305 static void ieee80211_enable_ps(struct ieee80211_local *local,
1306 struct ieee80211_sub_if_data *sdata)
1307 {
1308 struct ieee80211_conf *conf = &local->hw.conf;
1309
1310 /*
1311 * If we are scanning right now then the parameters will
1312 * take effect when scan finishes.
1313 */
1314 if (local->scanning)
1315 return;
1316
1317 if (conf->dynamic_ps_timeout > 0 &&
1318 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1319 mod_timer(&local->dynamic_ps_timer, jiffies +
1320 msecs_to_jiffies(conf->dynamic_ps_timeout));
1321 } else {
1322 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1323 ieee80211_send_nullfunc(local, sdata, 1);
1324
1325 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1326 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1327 return;
1328
1329 conf->flags |= IEEE80211_CONF_PS;
1330 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1331 }
1332 }
1333
1334 static void ieee80211_change_ps(struct ieee80211_local *local)
1335 {
1336 struct ieee80211_conf *conf = &local->hw.conf;
1337
1338 if (local->ps_sdata) {
1339 ieee80211_enable_ps(local, local->ps_sdata);
1340 } else if (conf->flags & IEEE80211_CONF_PS) {
1341 conf->flags &= ~IEEE80211_CONF_PS;
1342 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1343 del_timer_sync(&local->dynamic_ps_timer);
1344 cancel_work_sync(&local->dynamic_ps_enable_work);
1345 }
1346 }
1347
1348 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1349 {
1350 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1351 struct sta_info *sta = NULL;
1352 bool authorized = false;
1353
1354 if (!mgd->powersave)
1355 return false;
1356
1357 if (mgd->broken_ap)
1358 return false;
1359
1360 if (!mgd->associated)
1361 return false;
1362
1363 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1364 return false;
1365
1366 if (!mgd->have_beacon)
1367 return false;
1368
1369 rcu_read_lock();
1370 sta = sta_info_get(sdata, mgd->bssid);
1371 if (sta)
1372 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1373 rcu_read_unlock();
1374
1375 return authorized;
1376 }
1377
1378 /* need to hold RTNL or interface lock */
1379 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1380 {
1381 struct ieee80211_sub_if_data *sdata, *found = NULL;
1382 int count = 0;
1383 int timeout;
1384
1385 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1386 local->ps_sdata = NULL;
1387 return;
1388 }
1389
1390 list_for_each_entry(sdata, &local->interfaces, list) {
1391 if (!ieee80211_sdata_running(sdata))
1392 continue;
1393 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1394 /* If an AP vif is found, then disable PS
1395 * by setting the count to zero thereby setting
1396 * ps_sdata to NULL.
1397 */
1398 count = 0;
1399 break;
1400 }
1401 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1402 continue;
1403 found = sdata;
1404 count++;
1405 }
1406
1407 if (count == 1 && ieee80211_powersave_allowed(found)) {
1408 s32 beaconint_us;
1409
1410 if (latency < 0)
1411 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1412
1413 beaconint_us = ieee80211_tu_to_usec(
1414 found->vif.bss_conf.beacon_int);
1415
1416 timeout = local->dynamic_ps_forced_timeout;
1417 if (timeout < 0) {
1418 /*
1419 * Go to full PSM if the user configures a very low
1420 * latency requirement.
1421 * The 2000 second value is there for compatibility
1422 * until the PM_QOS_NETWORK_LATENCY is configured
1423 * with real values.
1424 */
1425 if (latency > (1900 * USEC_PER_MSEC) &&
1426 latency != (2000 * USEC_PER_SEC))
1427 timeout = 0;
1428 else
1429 timeout = 100;
1430 }
1431 local->hw.conf.dynamic_ps_timeout = timeout;
1432
1433 if (beaconint_us > latency) {
1434 local->ps_sdata = NULL;
1435 } else {
1436 int maxslp = 1;
1437 u8 dtimper = found->u.mgd.dtim_period;
1438
1439 /* If the TIM IE is invalid, pretend the value is 1 */
1440 if (!dtimper)
1441 dtimper = 1;
1442 else if (dtimper > 1)
1443 maxslp = min_t(int, dtimper,
1444 latency / beaconint_us);
1445
1446 local->hw.conf.max_sleep_period = maxslp;
1447 local->hw.conf.ps_dtim_period = dtimper;
1448 local->ps_sdata = found;
1449 }
1450 } else {
1451 local->ps_sdata = NULL;
1452 }
1453
1454 ieee80211_change_ps(local);
1455 }
1456
1457 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1458 {
1459 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1460
1461 if (sdata->vif.bss_conf.ps != ps_allowed) {
1462 sdata->vif.bss_conf.ps = ps_allowed;
1463 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1464 }
1465 }
1466
1467 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1468 {
1469 struct ieee80211_local *local =
1470 container_of(work, struct ieee80211_local,
1471 dynamic_ps_disable_work);
1472
1473 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1474 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1475 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1476 }
1477
1478 ieee80211_wake_queues_by_reason(&local->hw,
1479 IEEE80211_MAX_QUEUE_MAP,
1480 IEEE80211_QUEUE_STOP_REASON_PS,
1481 false);
1482 }
1483
1484 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1485 {
1486 struct ieee80211_local *local =
1487 container_of(work, struct ieee80211_local,
1488 dynamic_ps_enable_work);
1489 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1490 struct ieee80211_if_managed *ifmgd;
1491 unsigned long flags;
1492 int q;
1493
1494 /* can only happen when PS was just disabled anyway */
1495 if (!sdata)
1496 return;
1497
1498 ifmgd = &sdata->u.mgd;
1499
1500 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1501 return;
1502
1503 if (local->hw.conf.dynamic_ps_timeout > 0) {
1504 /* don't enter PS if TX frames are pending */
1505 if (drv_tx_frames_pending(local)) {
1506 mod_timer(&local->dynamic_ps_timer, jiffies +
1507 msecs_to_jiffies(
1508 local->hw.conf.dynamic_ps_timeout));
1509 return;
1510 }
1511
1512 /*
1513 * transmission can be stopped by others which leads to
1514 * dynamic_ps_timer expiry. Postpone the ps timer if it
1515 * is not the actual idle state.
1516 */
1517 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1518 for (q = 0; q < local->hw.queues; q++) {
1519 if (local->queue_stop_reasons[q]) {
1520 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1521 flags);
1522 mod_timer(&local->dynamic_ps_timer, jiffies +
1523 msecs_to_jiffies(
1524 local->hw.conf.dynamic_ps_timeout));
1525 return;
1526 }
1527 }
1528 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1529 }
1530
1531 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1532 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1533 if (drv_tx_frames_pending(local)) {
1534 mod_timer(&local->dynamic_ps_timer, jiffies +
1535 msecs_to_jiffies(
1536 local->hw.conf.dynamic_ps_timeout));
1537 } else {
1538 ieee80211_send_nullfunc(local, sdata, 1);
1539 /* Flush to get the tx status of nullfunc frame */
1540 ieee80211_flush_queues(local, sdata);
1541 }
1542 }
1543
1544 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1545 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1546 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1547 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1548 local->hw.conf.flags |= IEEE80211_CONF_PS;
1549 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1550 }
1551 }
1552
1553 void ieee80211_dynamic_ps_timer(unsigned long data)
1554 {
1555 struct ieee80211_local *local = (void *) data;
1556
1557 if (local->quiescing || local->suspended)
1558 return;
1559
1560 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1561 }
1562
1563 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1564 {
1565 struct delayed_work *delayed_work =
1566 container_of(work, struct delayed_work, work);
1567 struct ieee80211_sub_if_data *sdata =
1568 container_of(delayed_work, struct ieee80211_sub_if_data,
1569 dfs_cac_timer_work);
1570 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1571
1572 mutex_lock(&sdata->local->mtx);
1573 if (sdata->wdev.cac_started) {
1574 ieee80211_vif_release_channel(sdata);
1575 cfg80211_cac_event(sdata->dev, &chandef,
1576 NL80211_RADAR_CAC_FINISHED,
1577 GFP_KERNEL);
1578 }
1579 mutex_unlock(&sdata->local->mtx);
1580 }
1581
1582 /* MLME */
1583 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1584 struct ieee80211_sub_if_data *sdata,
1585 const u8 *wmm_param, size_t wmm_param_len)
1586 {
1587 struct ieee80211_tx_queue_params params;
1588 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1589 size_t left;
1590 int count;
1591 const u8 *pos;
1592 u8 uapsd_queues = 0;
1593
1594 if (!local->ops->conf_tx)
1595 return false;
1596
1597 if (local->hw.queues < IEEE80211_NUM_ACS)
1598 return false;
1599
1600 if (!wmm_param)
1601 return false;
1602
1603 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1604 return false;
1605
1606 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1607 uapsd_queues = ifmgd->uapsd_queues;
1608
1609 count = wmm_param[6] & 0x0f;
1610 if (count == ifmgd->wmm_last_param_set)
1611 return false;
1612 ifmgd->wmm_last_param_set = count;
1613
1614 pos = wmm_param + 8;
1615 left = wmm_param_len - 8;
1616
1617 memset(&params, 0, sizeof(params));
1618
1619 sdata->wmm_acm = 0;
1620 for (; left >= 4; left -= 4, pos += 4) {
1621 int aci = (pos[0] >> 5) & 0x03;
1622 int acm = (pos[0] >> 4) & 0x01;
1623 bool uapsd = false;
1624 int queue;
1625
1626 switch (aci) {
1627 case 1: /* AC_BK */
1628 queue = 3;
1629 if (acm)
1630 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1631 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1632 uapsd = true;
1633 break;
1634 case 2: /* AC_VI */
1635 queue = 1;
1636 if (acm)
1637 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1638 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1639 uapsd = true;
1640 break;
1641 case 3: /* AC_VO */
1642 queue = 0;
1643 if (acm)
1644 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1645 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1646 uapsd = true;
1647 break;
1648 case 0: /* AC_BE */
1649 default:
1650 queue = 2;
1651 if (acm)
1652 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1653 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1654 uapsd = true;
1655 break;
1656 }
1657
1658 params.aifs = pos[0] & 0x0f;
1659 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1660 params.cw_min = ecw2cw(pos[1] & 0x0f);
1661 params.txop = get_unaligned_le16(pos + 2);
1662 params.acm = acm;
1663 params.uapsd = uapsd;
1664
1665 mlme_dbg(sdata,
1666 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1667 queue, aci, acm,
1668 params.aifs, params.cw_min, params.cw_max,
1669 params.txop, params.uapsd);
1670 sdata->tx_conf[queue] = params;
1671 if (drv_conf_tx(local, sdata, queue, &params))
1672 sdata_err(sdata,
1673 "failed to set TX queue parameters for queue %d\n",
1674 queue);
1675 }
1676
1677 /* enable WMM or activate new settings */
1678 sdata->vif.bss_conf.qos = true;
1679 return true;
1680 }
1681
1682 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1683 {
1684 lockdep_assert_held(&sdata->local->mtx);
1685
1686 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1687 ieee80211_run_deferred_scan(sdata->local);
1688 }
1689
1690 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1691 {
1692 mutex_lock(&sdata->local->mtx);
1693 __ieee80211_stop_poll(sdata);
1694 mutex_unlock(&sdata->local->mtx);
1695 }
1696
1697 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1698 u16 capab, bool erp_valid, u8 erp)
1699 {
1700 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1701 u32 changed = 0;
1702 bool use_protection;
1703 bool use_short_preamble;
1704 bool use_short_slot;
1705
1706 if (erp_valid) {
1707 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1708 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1709 } else {
1710 use_protection = false;
1711 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1712 }
1713
1714 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1715 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1716 use_short_slot = true;
1717
1718 if (use_protection != bss_conf->use_cts_prot) {
1719 bss_conf->use_cts_prot = use_protection;
1720 changed |= BSS_CHANGED_ERP_CTS_PROT;
1721 }
1722
1723 if (use_short_preamble != bss_conf->use_short_preamble) {
1724 bss_conf->use_short_preamble = use_short_preamble;
1725 changed |= BSS_CHANGED_ERP_PREAMBLE;
1726 }
1727
1728 if (use_short_slot != bss_conf->use_short_slot) {
1729 bss_conf->use_short_slot = use_short_slot;
1730 changed |= BSS_CHANGED_ERP_SLOT;
1731 }
1732
1733 return changed;
1734 }
1735
1736 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1737 struct cfg80211_bss *cbss,
1738 u32 bss_info_changed)
1739 {
1740 struct ieee80211_bss *bss = (void *)cbss->priv;
1741 struct ieee80211_local *local = sdata->local;
1742 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1743
1744 bss_info_changed |= BSS_CHANGED_ASSOC;
1745 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1746 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1747
1748 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1749 beacon_loss_count * bss_conf->beacon_int));
1750
1751 sdata->u.mgd.associated = cbss;
1752 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1753
1754 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1755
1756 if (sdata->vif.p2p) {
1757 const struct cfg80211_bss_ies *ies;
1758
1759 rcu_read_lock();
1760 ies = rcu_dereference(cbss->ies);
1761 if (ies) {
1762 int ret;
1763
1764 ret = cfg80211_get_p2p_attr(
1765 ies->data, ies->len,
1766 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1767 (u8 *) &bss_conf->p2p_noa_attr,
1768 sizeof(bss_conf->p2p_noa_attr));
1769 if (ret >= 2) {
1770 sdata->u.mgd.p2p_noa_index =
1771 bss_conf->p2p_noa_attr.index;
1772 bss_info_changed |= BSS_CHANGED_P2P_PS;
1773 }
1774 }
1775 rcu_read_unlock();
1776 }
1777
1778 /* just to be sure */
1779 ieee80211_stop_poll(sdata);
1780
1781 ieee80211_led_assoc(local, 1);
1782
1783 if (sdata->u.mgd.have_beacon) {
1784 /*
1785 * If the AP is buggy we may get here with no DTIM period
1786 * known, so assume it's 1 which is the only safe assumption
1787 * in that case, although if the TIM IE is broken powersave
1788 * probably just won't work at all.
1789 */
1790 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1791 bss_conf->beacon_rate = bss->beacon_rate;
1792 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1793 } else {
1794 bss_conf->beacon_rate = NULL;
1795 bss_conf->dtim_period = 0;
1796 }
1797
1798 bss_conf->assoc = 1;
1799
1800 /* Tell the driver to monitor connection quality (if supported) */
1801 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1802 bss_conf->cqm_rssi_thold)
1803 bss_info_changed |= BSS_CHANGED_CQM;
1804
1805 /* Enable ARP filtering */
1806 if (bss_conf->arp_addr_cnt)
1807 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1808
1809 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1810
1811 mutex_lock(&local->iflist_mtx);
1812 ieee80211_recalc_ps(local, -1);
1813 mutex_unlock(&local->iflist_mtx);
1814
1815 ieee80211_recalc_smps(sdata);
1816 ieee80211_recalc_ps_vif(sdata);
1817
1818 netif_carrier_on(sdata->dev);
1819 }
1820
1821 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1822 u16 stype, u16 reason, bool tx,
1823 u8 *frame_buf)
1824 {
1825 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1826 struct ieee80211_local *local = sdata->local;
1827 u32 changed = 0;
1828
1829 sdata_assert_lock(sdata);
1830
1831 if (WARN_ON_ONCE(tx && !frame_buf))
1832 return;
1833
1834 if (WARN_ON(!ifmgd->associated))
1835 return;
1836
1837 ieee80211_stop_poll(sdata);
1838
1839 ifmgd->associated = NULL;
1840 netif_carrier_off(sdata->dev);
1841
1842 /*
1843 * if we want to get out of ps before disassoc (why?) we have
1844 * to do it before sending disassoc, as otherwise the null-packet
1845 * won't be valid.
1846 */
1847 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1848 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1849 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1850 }
1851 local->ps_sdata = NULL;
1852
1853 /* disable per-vif ps */
1854 ieee80211_recalc_ps_vif(sdata);
1855
1856 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1857 if (tx)
1858 ieee80211_flush_queues(local, sdata);
1859
1860 /* deauthenticate/disassociate now */
1861 if (tx || frame_buf)
1862 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1863 reason, tx, frame_buf);
1864
1865 /* flush out frame */
1866 if (tx)
1867 ieee80211_flush_queues(local, sdata);
1868
1869 /* clear bssid only after building the needed mgmt frames */
1870 memset(ifmgd->bssid, 0, ETH_ALEN);
1871
1872 /* remove AP and TDLS peers */
1873 sta_info_flush(sdata);
1874
1875 /* finally reset all BSS / config parameters */
1876 changed |= ieee80211_reset_erp_info(sdata);
1877
1878 ieee80211_led_assoc(local, 0);
1879 changed |= BSS_CHANGED_ASSOC;
1880 sdata->vif.bss_conf.assoc = false;
1881
1882 ifmgd->p2p_noa_index = -1;
1883 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1884 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
1885
1886 /* on the next assoc, re-program HT/VHT parameters */
1887 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1888 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1889 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1890 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
1891
1892 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1893
1894 del_timer_sync(&local->dynamic_ps_timer);
1895 cancel_work_sync(&local->dynamic_ps_enable_work);
1896
1897 /* Disable ARP filtering */
1898 if (sdata->vif.bss_conf.arp_addr_cnt)
1899 changed |= BSS_CHANGED_ARP_FILTER;
1900
1901 sdata->vif.bss_conf.qos = false;
1902 changed |= BSS_CHANGED_QOS;
1903
1904 /* The BSSID (not really interesting) and HT changed */
1905 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1906 ieee80211_bss_info_change_notify(sdata, changed);
1907
1908 /* disassociated - set to defaults now */
1909 ieee80211_set_wmm_default(sdata, false);
1910
1911 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1912 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1913 del_timer_sync(&sdata->u.mgd.timer);
1914 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1915
1916 sdata->vif.bss_conf.dtim_period = 0;
1917 sdata->vif.bss_conf.beacon_rate = NULL;
1918
1919 ifmgd->have_beacon = false;
1920
1921 ifmgd->flags = 0;
1922 mutex_lock(&local->mtx);
1923 ieee80211_vif_release_channel(sdata);
1924
1925 sdata->vif.csa_active = false;
1926 if (sdata->csa_block_tx) {
1927 ieee80211_wake_vif_queues(local, sdata,
1928 IEEE80211_QUEUE_STOP_REASON_CSA);
1929 sdata->csa_block_tx = false;
1930 }
1931 mutex_unlock(&local->mtx);
1932
1933 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1934 }
1935
1936 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1937 struct ieee80211_hdr *hdr)
1938 {
1939 /*
1940 * We can postpone the mgd.timer whenever receiving unicast frames
1941 * from AP because we know that the connection is working both ways
1942 * at that time. But multicast frames (and hence also beacons) must
1943 * be ignored here, because we need to trigger the timer during
1944 * data idle periods for sending the periodic probe request to the
1945 * AP we're connected to.
1946 */
1947 if (is_multicast_ether_addr(hdr->addr1))
1948 return;
1949
1950 ieee80211_sta_reset_conn_monitor(sdata);
1951 }
1952
1953 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1954 {
1955 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1956 struct ieee80211_local *local = sdata->local;
1957
1958 mutex_lock(&local->mtx);
1959 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
1960 goto out;
1961
1962 __ieee80211_stop_poll(sdata);
1963
1964 mutex_lock(&local->iflist_mtx);
1965 ieee80211_recalc_ps(local, -1);
1966 mutex_unlock(&local->iflist_mtx);
1967
1968 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1969 goto out;
1970
1971 /*
1972 * We've received a probe response, but are not sure whether
1973 * we have or will be receiving any beacons or data, so let's
1974 * schedule the timers again, just in case.
1975 */
1976 ieee80211_sta_reset_beacon_monitor(sdata);
1977
1978 mod_timer(&ifmgd->conn_mon_timer,
1979 round_jiffies_up(jiffies +
1980 IEEE80211_CONNECTION_IDLE_TIME));
1981 out:
1982 mutex_unlock(&local->mtx);
1983 }
1984
1985 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1986 struct ieee80211_hdr *hdr, bool ack)
1987 {
1988 if (!ieee80211_is_data(hdr->frame_control))
1989 return;
1990
1991 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1992 sdata->u.mgd.probe_send_count > 0) {
1993 if (ack)
1994 ieee80211_sta_reset_conn_monitor(sdata);
1995 else
1996 sdata->u.mgd.nullfunc_failed = true;
1997 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1998 return;
1999 }
2000
2001 if (ack)
2002 ieee80211_sta_reset_conn_monitor(sdata);
2003 }
2004
2005 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2006 {
2007 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2008 const u8 *ssid;
2009 u8 *dst = ifmgd->associated->bssid;
2010 u8 unicast_limit = max(1, max_probe_tries - 3);
2011
2012 /*
2013 * Try sending broadcast probe requests for the last three
2014 * probe requests after the first ones failed since some
2015 * buggy APs only support broadcast probe requests.
2016 */
2017 if (ifmgd->probe_send_count >= unicast_limit)
2018 dst = NULL;
2019
2020 /*
2021 * When the hardware reports an accurate Tx ACK status, it's
2022 * better to send a nullfunc frame instead of a probe request,
2023 * as it will kick us off the AP quickly if we aren't associated
2024 * anymore. The timeout will be reset if the frame is ACKed by
2025 * the AP.
2026 */
2027 ifmgd->probe_send_count++;
2028
2029 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2030 ifmgd->nullfunc_failed = false;
2031 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2032 } else {
2033 int ssid_len;
2034
2035 rcu_read_lock();
2036 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2037 if (WARN_ON_ONCE(ssid == NULL))
2038 ssid_len = 0;
2039 else
2040 ssid_len = ssid[1];
2041
2042 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
2043 0, (u32) -1, true, 0,
2044 ifmgd->associated->channel, false);
2045 rcu_read_unlock();
2046 }
2047
2048 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2049 run_again(sdata, ifmgd->probe_timeout);
2050 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2051 ieee80211_flush_queues(sdata->local, sdata);
2052 }
2053
2054 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2055 bool beacon)
2056 {
2057 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2058 bool already = false;
2059
2060 if (!ieee80211_sdata_running(sdata))
2061 return;
2062
2063 sdata_lock(sdata);
2064
2065 if (!ifmgd->associated)
2066 goto out;
2067
2068 mutex_lock(&sdata->local->mtx);
2069
2070 if (sdata->local->tmp_channel || sdata->local->scanning) {
2071 mutex_unlock(&sdata->local->mtx);
2072 goto out;
2073 }
2074
2075 if (beacon) {
2076 mlme_dbg_ratelimited(sdata,
2077 "detected beacon loss from AP (missed %d beacons) - probing\n",
2078 beacon_loss_count);
2079
2080 ieee80211_cqm_rssi_notify(&sdata->vif,
2081 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2082 GFP_KERNEL);
2083 }
2084
2085 /*
2086 * The driver/our work has already reported this event or the
2087 * connection monitoring has kicked in and we have already sent
2088 * a probe request. Or maybe the AP died and the driver keeps
2089 * reporting until we disassociate...
2090 *
2091 * In either case we have to ignore the current call to this
2092 * function (except for setting the correct probe reason bit)
2093 * because otherwise we would reset the timer every time and
2094 * never check whether we received a probe response!
2095 */
2096 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2097 already = true;
2098
2099 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2100
2101 mutex_unlock(&sdata->local->mtx);
2102
2103 if (already)
2104 goto out;
2105
2106 mutex_lock(&sdata->local->iflist_mtx);
2107 ieee80211_recalc_ps(sdata->local, -1);
2108 mutex_unlock(&sdata->local->iflist_mtx);
2109
2110 ifmgd->probe_send_count = 0;
2111 ieee80211_mgd_probe_ap_send(sdata);
2112 out:
2113 sdata_unlock(sdata);
2114 }
2115
2116 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2117 struct ieee80211_vif *vif)
2118 {
2119 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2120 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2121 struct cfg80211_bss *cbss;
2122 struct sk_buff *skb;
2123 const u8 *ssid;
2124 int ssid_len;
2125
2126 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2127 return NULL;
2128
2129 sdata_assert_lock(sdata);
2130
2131 if (ifmgd->associated)
2132 cbss = ifmgd->associated;
2133 else if (ifmgd->auth_data)
2134 cbss = ifmgd->auth_data->bss;
2135 else if (ifmgd->assoc_data)
2136 cbss = ifmgd->assoc_data->bss;
2137 else
2138 return NULL;
2139
2140 rcu_read_lock();
2141 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2142 if (WARN_ON_ONCE(ssid == NULL))
2143 ssid_len = 0;
2144 else
2145 ssid_len = ssid[1];
2146
2147 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
2148 (u32) -1, cbss->channel,
2149 ssid + 2, ssid_len,
2150 NULL, 0, true);
2151 rcu_read_unlock();
2152
2153 return skb;
2154 }
2155 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2156
2157 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2158 {
2159 struct ieee80211_local *local = sdata->local;
2160 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2161 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2162
2163 sdata_lock(sdata);
2164 if (!ifmgd->associated) {
2165 sdata_unlock(sdata);
2166 return;
2167 }
2168
2169 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2170 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2171 true, frame_buf);
2172 mutex_lock(&local->mtx);
2173 sdata->vif.csa_active = false;
2174 if (sdata->csa_block_tx) {
2175 ieee80211_wake_vif_queues(local, sdata,
2176 IEEE80211_QUEUE_STOP_REASON_CSA);
2177 sdata->csa_block_tx = false;
2178 }
2179 mutex_unlock(&local->mtx);
2180
2181 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2182 IEEE80211_DEAUTH_FRAME_LEN);
2183 sdata_unlock(sdata);
2184 }
2185
2186 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2187 {
2188 struct ieee80211_sub_if_data *sdata =
2189 container_of(work, struct ieee80211_sub_if_data,
2190 u.mgd.beacon_connection_loss_work);
2191 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2192 struct sta_info *sta;
2193
2194 if (ifmgd->associated) {
2195 rcu_read_lock();
2196 sta = sta_info_get(sdata, ifmgd->bssid);
2197 if (sta)
2198 sta->beacon_loss_count++;
2199 rcu_read_unlock();
2200 }
2201
2202 if (ifmgd->connection_loss) {
2203 sdata_info(sdata, "Connection to AP %pM lost\n",
2204 ifmgd->bssid);
2205 __ieee80211_disconnect(sdata);
2206 } else {
2207 ieee80211_mgd_probe_ap(sdata, true);
2208 }
2209 }
2210
2211 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2212 {
2213 struct ieee80211_sub_if_data *sdata =
2214 container_of(work, struct ieee80211_sub_if_data,
2215 u.mgd.csa_connection_drop_work);
2216
2217 __ieee80211_disconnect(sdata);
2218 }
2219
2220 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2221 {
2222 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2223 struct ieee80211_hw *hw = &sdata->local->hw;
2224
2225 trace_api_beacon_loss(sdata);
2226
2227 sdata->u.mgd.connection_loss = false;
2228 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2229 }
2230 EXPORT_SYMBOL(ieee80211_beacon_loss);
2231
2232 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2233 {
2234 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2235 struct ieee80211_hw *hw = &sdata->local->hw;
2236
2237 trace_api_connection_loss(sdata);
2238
2239 sdata->u.mgd.connection_loss = true;
2240 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2241 }
2242 EXPORT_SYMBOL(ieee80211_connection_loss);
2243
2244
2245 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2246 bool assoc)
2247 {
2248 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2249
2250 sdata_assert_lock(sdata);
2251
2252 if (!assoc) {
2253 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2254
2255 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2256 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2257 sdata->u.mgd.flags = 0;
2258 mutex_lock(&sdata->local->mtx);
2259 ieee80211_vif_release_channel(sdata);
2260 mutex_unlock(&sdata->local->mtx);
2261 }
2262
2263 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2264 kfree(auth_data);
2265 sdata->u.mgd.auth_data = NULL;
2266 }
2267
2268 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2269 struct ieee80211_mgmt *mgmt, size_t len)
2270 {
2271 struct ieee80211_local *local = sdata->local;
2272 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2273 u8 *pos;
2274 struct ieee802_11_elems elems;
2275 u32 tx_flags = 0;
2276
2277 pos = mgmt->u.auth.variable;
2278 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2279 if (!elems.challenge)
2280 return;
2281 auth_data->expected_transaction = 4;
2282 drv_mgd_prepare_tx(sdata->local, sdata);
2283 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2284 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2285 IEEE80211_TX_INTFL_MLME_CONN_TX;
2286 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2287 elems.challenge - 2, elems.challenge_len + 2,
2288 auth_data->bss->bssid, auth_data->bss->bssid,
2289 auth_data->key, auth_data->key_len,
2290 auth_data->key_idx, tx_flags);
2291 }
2292
2293 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2294 struct ieee80211_mgmt *mgmt, size_t len)
2295 {
2296 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2297 u8 bssid[ETH_ALEN];
2298 u16 auth_alg, auth_transaction, status_code;
2299 struct sta_info *sta;
2300
2301 sdata_assert_lock(sdata);
2302
2303 if (len < 24 + 6)
2304 return;
2305
2306 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2307 return;
2308
2309 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2310
2311 if (!ether_addr_equal(bssid, mgmt->bssid))
2312 return;
2313
2314 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2315 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2316 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2317
2318 if (auth_alg != ifmgd->auth_data->algorithm ||
2319 auth_transaction != ifmgd->auth_data->expected_transaction) {
2320 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2321 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2322 auth_transaction,
2323 ifmgd->auth_data->expected_transaction);
2324 return;
2325 }
2326
2327 if (status_code != WLAN_STATUS_SUCCESS) {
2328 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2329 mgmt->sa, status_code);
2330 ieee80211_destroy_auth_data(sdata, false);
2331 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2332 return;
2333 }
2334
2335 switch (ifmgd->auth_data->algorithm) {
2336 case WLAN_AUTH_OPEN:
2337 case WLAN_AUTH_LEAP:
2338 case WLAN_AUTH_FT:
2339 case WLAN_AUTH_SAE:
2340 break;
2341 case WLAN_AUTH_SHARED_KEY:
2342 if (ifmgd->auth_data->expected_transaction != 4) {
2343 ieee80211_auth_challenge(sdata, mgmt, len);
2344 /* need another frame */
2345 return;
2346 }
2347 break;
2348 default:
2349 WARN_ONCE(1, "invalid auth alg %d",
2350 ifmgd->auth_data->algorithm);
2351 return;
2352 }
2353
2354 sdata_info(sdata, "authenticated\n");
2355 ifmgd->auth_data->done = true;
2356 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2357 ifmgd->auth_data->timeout_started = true;
2358 run_again(sdata, ifmgd->auth_data->timeout);
2359
2360 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2361 ifmgd->auth_data->expected_transaction != 2) {
2362 /*
2363 * Report auth frame to user space for processing since another
2364 * round of Authentication frames is still needed.
2365 */
2366 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2367 return;
2368 }
2369
2370 /* move station state to auth */
2371 mutex_lock(&sdata->local->sta_mtx);
2372 sta = sta_info_get(sdata, bssid);
2373 if (!sta) {
2374 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2375 goto out_err;
2376 }
2377 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2378 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2379 goto out_err;
2380 }
2381 mutex_unlock(&sdata->local->sta_mtx);
2382
2383 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2384 return;
2385 out_err:
2386 mutex_unlock(&sdata->local->sta_mtx);
2387 /* ignore frame -- wait for timeout */
2388 }
2389
2390 #define case_WLAN(type) \
2391 case WLAN_REASON_##type: return #type
2392
2393 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2394 {
2395 switch (reason_code) {
2396 case_WLAN(UNSPECIFIED);
2397 case_WLAN(PREV_AUTH_NOT_VALID);
2398 case_WLAN(DEAUTH_LEAVING);
2399 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2400 case_WLAN(DISASSOC_AP_BUSY);
2401 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2402 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2403 case_WLAN(DISASSOC_STA_HAS_LEFT);
2404 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2405 case_WLAN(DISASSOC_BAD_POWER);
2406 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2407 case_WLAN(INVALID_IE);
2408 case_WLAN(MIC_FAILURE);
2409 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2410 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2411 case_WLAN(IE_DIFFERENT);
2412 case_WLAN(INVALID_GROUP_CIPHER);
2413 case_WLAN(INVALID_PAIRWISE_CIPHER);
2414 case_WLAN(INVALID_AKMP);
2415 case_WLAN(UNSUPP_RSN_VERSION);
2416 case_WLAN(INVALID_RSN_IE_CAP);
2417 case_WLAN(IEEE8021X_FAILED);
2418 case_WLAN(CIPHER_SUITE_REJECTED);
2419 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2420 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2421 case_WLAN(DISASSOC_LOW_ACK);
2422 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2423 case_WLAN(QSTA_LEAVE_QBSS);
2424 case_WLAN(QSTA_NOT_USE);
2425 case_WLAN(QSTA_REQUIRE_SETUP);
2426 case_WLAN(QSTA_TIMEOUT);
2427 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2428 case_WLAN(MESH_PEER_CANCELED);
2429 case_WLAN(MESH_MAX_PEERS);
2430 case_WLAN(MESH_CONFIG);
2431 case_WLAN(MESH_CLOSE);
2432 case_WLAN(MESH_MAX_RETRIES);
2433 case_WLAN(MESH_CONFIRM_TIMEOUT);
2434 case_WLAN(MESH_INVALID_GTK);
2435 case_WLAN(MESH_INCONSISTENT_PARAM);
2436 case_WLAN(MESH_INVALID_SECURITY);
2437 case_WLAN(MESH_PATH_ERROR);
2438 case_WLAN(MESH_PATH_NOFORWARD);
2439 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2440 case_WLAN(MAC_EXISTS_IN_MBSS);
2441 case_WLAN(MESH_CHAN_REGULATORY);
2442 case_WLAN(MESH_CHAN);
2443 default: return "<unknown>";
2444 }
2445 }
2446
2447 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2448 struct ieee80211_mgmt *mgmt, size_t len)
2449 {
2450 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2451 const u8 *bssid = NULL;
2452 u16 reason_code;
2453
2454 sdata_assert_lock(sdata);
2455
2456 if (len < 24 + 2)
2457 return;
2458
2459 if (!ifmgd->associated ||
2460 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2461 return;
2462
2463 bssid = ifmgd->associated->bssid;
2464
2465 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2466
2467 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2468 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
2469
2470 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2471
2472 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2473 }
2474
2475
2476 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2477 struct ieee80211_mgmt *mgmt, size_t len)
2478 {
2479 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2480 u16 reason_code;
2481
2482 sdata_assert_lock(sdata);
2483
2484 if (len < 24 + 2)
2485 return;
2486
2487 if (!ifmgd->associated ||
2488 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2489 return;
2490
2491 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2492
2493 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2494 mgmt->sa, reason_code);
2495
2496 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2497
2498 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2499 }
2500
2501 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2502 u8 *supp_rates, unsigned int supp_rates_len,
2503 u32 *rates, u32 *basic_rates,
2504 bool *have_higher_than_11mbit,
2505 int *min_rate, int *min_rate_index,
2506 int shift, u32 rate_flags)
2507 {
2508 int i, j;
2509
2510 for (i = 0; i < supp_rates_len; i++) {
2511 int rate = supp_rates[i] & 0x7f;
2512 bool is_basic = !!(supp_rates[i] & 0x80);
2513
2514 if ((rate * 5 * (1 << shift)) > 110)
2515 *have_higher_than_11mbit = true;
2516
2517 /*
2518 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2519 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2520 *
2521 * Note: Even through the membership selector and the basic
2522 * rate flag share the same bit, they are not exactly
2523 * the same.
2524 */
2525 if (!!(supp_rates[i] & 0x80) &&
2526 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2527 continue;
2528
2529 for (j = 0; j < sband->n_bitrates; j++) {
2530 struct ieee80211_rate *br;
2531 int brate;
2532
2533 br = &sband->bitrates[j];
2534 if ((rate_flags & br->flags) != rate_flags)
2535 continue;
2536
2537 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2538 if (brate == rate) {
2539 *rates |= BIT(j);
2540 if (is_basic)
2541 *basic_rates |= BIT(j);
2542 if ((rate * 5) < *min_rate) {
2543 *min_rate = rate * 5;
2544 *min_rate_index = j;
2545 }
2546 break;
2547 }
2548 }
2549 }
2550 }
2551
2552 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2553 bool assoc)
2554 {
2555 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2556
2557 sdata_assert_lock(sdata);
2558
2559 if (!assoc) {
2560 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2561
2562 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2563 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2564 sdata->u.mgd.flags = 0;
2565 mutex_lock(&sdata->local->mtx);
2566 ieee80211_vif_release_channel(sdata);
2567 mutex_unlock(&sdata->local->mtx);
2568 }
2569
2570 kfree(assoc_data);
2571 sdata->u.mgd.assoc_data = NULL;
2572 }
2573
2574 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2575 struct cfg80211_bss *cbss,
2576 struct ieee80211_mgmt *mgmt, size_t len)
2577 {
2578 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2579 struct ieee80211_local *local = sdata->local;
2580 struct ieee80211_supported_band *sband;
2581 struct sta_info *sta;
2582 u8 *pos;
2583 u16 capab_info, aid;
2584 struct ieee802_11_elems elems;
2585 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2586 const struct cfg80211_bss_ies *bss_ies = NULL;
2587 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2588 u32 changed = 0;
2589 int err;
2590 bool ret;
2591
2592 /* AssocResp and ReassocResp have identical structure */
2593
2594 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2595 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2596
2597 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2598 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2599 aid);
2600 aid &= ~(BIT(15) | BIT(14));
2601
2602 ifmgd->broken_ap = false;
2603
2604 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2605 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2606 aid);
2607 aid = 0;
2608 ifmgd->broken_ap = true;
2609 }
2610
2611 pos = mgmt->u.assoc_resp.variable;
2612 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2613
2614 if (!elems.supp_rates) {
2615 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2616 return false;
2617 }
2618
2619 ifmgd->aid = aid;
2620
2621 /*
2622 * Some APs are erroneously not including some information in their
2623 * (re)association response frames. Try to recover by using the data
2624 * from the beacon or probe response. This seems to afflict mobile
2625 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2626 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2627 */
2628 if ((assoc_data->wmm && !elems.wmm_param) ||
2629 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2630 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2631 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2632 (!elems.vht_cap_elem || !elems.vht_operation))) {
2633 const struct cfg80211_bss_ies *ies;
2634 struct ieee802_11_elems bss_elems;
2635
2636 rcu_read_lock();
2637 ies = rcu_dereference(cbss->ies);
2638 if (ies)
2639 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2640 GFP_ATOMIC);
2641 rcu_read_unlock();
2642 if (!bss_ies)
2643 return false;
2644
2645 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2646 false, &bss_elems);
2647 if (assoc_data->wmm &&
2648 !elems.wmm_param && bss_elems.wmm_param) {
2649 elems.wmm_param = bss_elems.wmm_param;
2650 sdata_info(sdata,
2651 "AP bug: WMM param missing from AssocResp\n");
2652 }
2653
2654 /*
2655 * Also check if we requested HT/VHT, otherwise the AP doesn't
2656 * have to include the IEs in the (re)association response.
2657 */
2658 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2659 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2660 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2661 sdata_info(sdata,
2662 "AP bug: HT capability missing from AssocResp\n");
2663 }
2664 if (!elems.ht_operation && bss_elems.ht_operation &&
2665 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2666 elems.ht_operation = bss_elems.ht_operation;
2667 sdata_info(sdata,
2668 "AP bug: HT operation missing from AssocResp\n");
2669 }
2670 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2671 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2672 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2673 sdata_info(sdata,
2674 "AP bug: VHT capa missing from AssocResp\n");
2675 }
2676 if (!elems.vht_operation && bss_elems.vht_operation &&
2677 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2678 elems.vht_operation = bss_elems.vht_operation;
2679 sdata_info(sdata,
2680 "AP bug: VHT operation missing from AssocResp\n");
2681 }
2682 }
2683
2684 /*
2685 * We previously checked these in the beacon/probe response, so
2686 * they should be present here. This is just a safety net.
2687 */
2688 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2689 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2690 sdata_info(sdata,
2691 "HT AP is missing WMM params or HT capability/operation\n");
2692 ret = false;
2693 goto out;
2694 }
2695
2696 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2697 (!elems.vht_cap_elem || !elems.vht_operation)) {
2698 sdata_info(sdata,
2699 "VHT AP is missing VHT capability/operation\n");
2700 ret = false;
2701 goto out;
2702 }
2703
2704 mutex_lock(&sdata->local->sta_mtx);
2705 /*
2706 * station info was already allocated and inserted before
2707 * the association and should be available to us
2708 */
2709 sta = sta_info_get(sdata, cbss->bssid);
2710 if (WARN_ON(!sta)) {
2711 mutex_unlock(&sdata->local->sta_mtx);
2712 ret = false;
2713 goto out;
2714 }
2715
2716 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2717
2718 /* Set up internal HT/VHT capabilities */
2719 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2720 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2721 elems.ht_cap_elem, sta);
2722
2723 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2724 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2725 elems.vht_cap_elem, sta);
2726
2727 /*
2728 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2729 * in their association response, so ignore that data for our own
2730 * configuration. If it changed since the last beacon, we'll get the
2731 * next beacon and update then.
2732 */
2733
2734 /*
2735 * If an operating mode notification IE is present, override the
2736 * NSS calculation (that would be done in rate_control_rate_init())
2737 * and use the # of streams from that element.
2738 */
2739 if (elems.opmode_notif &&
2740 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2741 u8 nss;
2742
2743 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2744 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2745 nss += 1;
2746 sta->sta.rx_nss = nss;
2747 }
2748
2749 rate_control_rate_init(sta);
2750
2751 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2752 set_sta_flag(sta, WLAN_STA_MFP);
2753
2754 sta->sta.wme = elems.wmm_param;
2755
2756 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2757 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2758 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2759 if (err) {
2760 sdata_info(sdata,
2761 "failed to move station %pM to desired state\n",
2762 sta->sta.addr);
2763 WARN_ON(__sta_info_destroy(sta));
2764 mutex_unlock(&sdata->local->sta_mtx);
2765 ret = false;
2766 goto out;
2767 }
2768
2769 mutex_unlock(&sdata->local->sta_mtx);
2770
2771 /*
2772 * Always handle WMM once after association regardless
2773 * of the first value the AP uses. Setting -1 here has
2774 * that effect because the AP values is an unsigned
2775 * 4-bit value.
2776 */
2777 ifmgd->wmm_last_param_set = -1;
2778
2779 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
2780 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2781 elems.wmm_param_len);
2782 else
2783 ieee80211_set_wmm_default(sdata, false);
2784 changed |= BSS_CHANGED_QOS;
2785
2786 /* set AID and assoc capability,
2787 * ieee80211_set_associated() will tell the driver */
2788 bss_conf->aid = aid;
2789 bss_conf->assoc_capability = capab_info;
2790 ieee80211_set_associated(sdata, cbss, changed);
2791
2792 /*
2793 * If we're using 4-addr mode, let the AP know that we're
2794 * doing so, so that it can create the STA VLAN on its side
2795 */
2796 if (ifmgd->use_4addr)
2797 ieee80211_send_4addr_nullfunc(local, sdata);
2798
2799 /*
2800 * Start timer to probe the connection to the AP now.
2801 * Also start the timer that will detect beacon loss.
2802 */
2803 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2804 ieee80211_sta_reset_beacon_monitor(sdata);
2805
2806 ret = true;
2807 out:
2808 kfree(bss_ies);
2809 return ret;
2810 }
2811
2812 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2813 struct ieee80211_mgmt *mgmt,
2814 size_t len)
2815 {
2816 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2817 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2818 u16 capab_info, status_code, aid;
2819 struct ieee802_11_elems elems;
2820 int ac, uapsd_queues = -1;
2821 u8 *pos;
2822 bool reassoc;
2823 struct cfg80211_bss *bss;
2824
2825 sdata_assert_lock(sdata);
2826
2827 if (!assoc_data)
2828 return;
2829 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2830 return;
2831
2832 /*
2833 * AssocResp and ReassocResp have identical structure, so process both
2834 * of them in this function.
2835 */
2836
2837 if (len < 24 + 6)
2838 return;
2839
2840 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2841 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2842 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2843 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2844
2845 sdata_info(sdata,
2846 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2847 reassoc ? "Rea" : "A", mgmt->sa,
2848 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2849
2850 pos = mgmt->u.assoc_resp.variable;
2851 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2852
2853 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2854 elems.timeout_int &&
2855 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2856 u32 tu, ms;
2857 tu = le32_to_cpu(elems.timeout_int->value);
2858 ms = tu * 1024 / 1000;
2859 sdata_info(sdata,
2860 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2861 mgmt->sa, tu, ms);
2862 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2863 assoc_data->timeout_started = true;
2864 if (ms > IEEE80211_ASSOC_TIMEOUT)
2865 run_again(sdata, assoc_data->timeout);
2866 return;
2867 }
2868
2869 bss = assoc_data->bss;
2870
2871 if (status_code != WLAN_STATUS_SUCCESS) {
2872 sdata_info(sdata, "%pM denied association (code=%d)\n",
2873 mgmt->sa, status_code);
2874 ieee80211_destroy_assoc_data(sdata, false);
2875 } else {
2876 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
2877 /* oops -- internal error -- send timeout for now */
2878 ieee80211_destroy_assoc_data(sdata, false);
2879 cfg80211_assoc_timeout(sdata->dev, bss);
2880 return;
2881 }
2882 sdata_info(sdata, "associated\n");
2883
2884 /*
2885 * destroy assoc_data afterwards, as otherwise an idle
2886 * recalc after assoc_data is NULL but before associated
2887 * is set can cause the interface to go idle
2888 */
2889 ieee80211_destroy_assoc_data(sdata, true);
2890
2891 /* get uapsd queues configuration */
2892 uapsd_queues = 0;
2893 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2894 if (sdata->tx_conf[ac].uapsd)
2895 uapsd_queues |= BIT(ac);
2896 }
2897
2898 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
2899 }
2900
2901 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2902 struct ieee80211_mgmt *mgmt, size_t len,
2903 struct ieee80211_rx_status *rx_status,
2904 struct ieee802_11_elems *elems)
2905 {
2906 struct ieee80211_local *local = sdata->local;
2907 struct ieee80211_bss *bss;
2908 struct ieee80211_channel *channel;
2909
2910 sdata_assert_lock(sdata);
2911
2912 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
2913 if (!channel)
2914 return;
2915
2916 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2917 channel);
2918 if (bss) {
2919 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2920 ieee80211_rx_bss_put(local, bss);
2921 }
2922 }
2923
2924
2925 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2926 struct sk_buff *skb)
2927 {
2928 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2929 struct ieee80211_if_managed *ifmgd;
2930 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2931 size_t baselen, len = skb->len;
2932 struct ieee802_11_elems elems;
2933
2934 ifmgd = &sdata->u.mgd;
2935
2936 sdata_assert_lock(sdata);
2937
2938 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2939 return; /* ignore ProbeResp to foreign address */
2940
2941 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2942 if (baselen > len)
2943 return;
2944
2945 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2946 false, &elems);
2947
2948 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2949
2950 if (ifmgd->associated &&
2951 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2952 ieee80211_reset_ap_probe(sdata);
2953
2954 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2955 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2956 /* got probe response, continue with auth */
2957 sdata_info(sdata, "direct probe responded\n");
2958 ifmgd->auth_data->tries = 0;
2959 ifmgd->auth_data->timeout = jiffies;
2960 ifmgd->auth_data->timeout_started = true;
2961 run_again(sdata, ifmgd->auth_data->timeout);
2962 }
2963 }
2964
2965 /*
2966 * This is the canonical list of information elements we care about,
2967 * the filter code also gives us all changes to the Microsoft OUI
2968 * (00:50:F2) vendor IE which is used for WMM which we need to track,
2969 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
2970 * changes to requested client power.
2971 *
2972 * We implement beacon filtering in software since that means we can
2973 * avoid processing the frame here and in cfg80211, and userspace
2974 * will not be able to tell whether the hardware supports it or not.
2975 *
2976 * XXX: This list needs to be dynamic -- userspace needs to be able to
2977 * add items it requires. It also needs to be able to tell us to
2978 * look out for other vendor IEs.
2979 */
2980 static const u64 care_about_ies =
2981 (1ULL << WLAN_EID_COUNTRY) |
2982 (1ULL << WLAN_EID_ERP_INFO) |
2983 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2984 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2985 (1ULL << WLAN_EID_HT_CAPABILITY) |
2986 (1ULL << WLAN_EID_HT_OPERATION);
2987
2988 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2989 struct ieee80211_mgmt *mgmt, size_t len,
2990 struct ieee80211_rx_status *rx_status)
2991 {
2992 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2993 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2994 size_t baselen;
2995 struct ieee802_11_elems elems;
2996 struct ieee80211_local *local = sdata->local;
2997 struct ieee80211_chanctx_conf *chanctx_conf;
2998 struct ieee80211_channel *chan;
2999 struct sta_info *sta;
3000 u32 changed = 0;
3001 bool erp_valid;
3002 u8 erp_value = 0;
3003 u32 ncrc;
3004 u8 *bssid;
3005 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3006
3007 sdata_assert_lock(sdata);
3008
3009 /* Process beacon from the current BSS */
3010 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3011 if (baselen > len)
3012 return;
3013
3014 rcu_read_lock();
3015 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3016 if (!chanctx_conf) {
3017 rcu_read_unlock();
3018 return;
3019 }
3020
3021 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3022 rcu_read_unlock();
3023 return;
3024 }
3025 chan = chanctx_conf->def.chan;
3026 rcu_read_unlock();
3027
3028 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3029 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3030 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3031 len - baselen, false, &elems);
3032
3033 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3034 if (elems.tim && !elems.parse_error) {
3035 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3036 ifmgd->dtim_period = tim_ie->dtim_period;
3037 }
3038 ifmgd->have_beacon = true;
3039 ifmgd->assoc_data->need_beacon = false;
3040 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3041 sdata->vif.bss_conf.sync_tsf =
3042 le64_to_cpu(mgmt->u.beacon.timestamp);
3043 sdata->vif.bss_conf.sync_device_ts =
3044 rx_status->device_timestamp;
3045 if (elems.tim)
3046 sdata->vif.bss_conf.sync_dtim_count =
3047 elems.tim->dtim_count;
3048 else
3049 sdata->vif.bss_conf.sync_dtim_count = 0;
3050 }
3051 /* continue assoc process */
3052 ifmgd->assoc_data->timeout = jiffies;
3053 ifmgd->assoc_data->timeout_started = true;
3054 run_again(sdata, ifmgd->assoc_data->timeout);
3055 return;
3056 }
3057
3058 if (!ifmgd->associated ||
3059 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3060 return;
3061 bssid = ifmgd->associated->bssid;
3062
3063 /* Track average RSSI from the Beacon frames of the current AP */
3064 ifmgd->last_beacon_signal = rx_status->signal;
3065 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3066 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3067 ifmgd->ave_beacon_signal = rx_status->signal * 16;
3068 ifmgd->last_cqm_event_signal = 0;
3069 ifmgd->count_beacon_signal = 1;
3070 ifmgd->last_ave_beacon_signal = 0;
3071 } else {
3072 ifmgd->ave_beacon_signal =
3073 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3074 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3075 ifmgd->ave_beacon_signal) / 16;
3076 ifmgd->count_beacon_signal++;
3077 }
3078
3079 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3080 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3081 int sig = ifmgd->ave_beacon_signal;
3082 int last_sig = ifmgd->last_ave_beacon_signal;
3083
3084 /*
3085 * if signal crosses either of the boundaries, invoke callback
3086 * with appropriate parameters
3087 */
3088 if (sig > ifmgd->rssi_max_thold &&
3089 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3090 ifmgd->last_ave_beacon_signal = sig;
3091 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3092 } else if (sig < ifmgd->rssi_min_thold &&
3093 (last_sig >= ifmgd->rssi_max_thold ||
3094 last_sig == 0)) {
3095 ifmgd->last_ave_beacon_signal = sig;
3096 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3097 }
3098 }
3099
3100 if (bss_conf->cqm_rssi_thold &&
3101 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3102 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3103 int sig = ifmgd->ave_beacon_signal / 16;
3104 int last_event = ifmgd->last_cqm_event_signal;
3105 int thold = bss_conf->cqm_rssi_thold;
3106 int hyst = bss_conf->cqm_rssi_hyst;
3107 if (sig < thold &&
3108 (last_event == 0 || sig < last_event - hyst)) {
3109 ifmgd->last_cqm_event_signal = sig;
3110 ieee80211_cqm_rssi_notify(
3111 &sdata->vif,
3112 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3113 GFP_KERNEL);
3114 } else if (sig > thold &&
3115 (last_event == 0 || sig > last_event + hyst)) {
3116 ifmgd->last_cqm_event_signal = sig;
3117 ieee80211_cqm_rssi_notify(
3118 &sdata->vif,
3119 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3120 GFP_KERNEL);
3121 }
3122 }
3123
3124 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3125 mlme_dbg_ratelimited(sdata,
3126 "cancelling AP probe due to a received beacon\n");
3127 ieee80211_reset_ap_probe(sdata);
3128 }
3129
3130 /*
3131 * Push the beacon loss detection into the future since
3132 * we are processing a beacon from the AP just now.
3133 */
3134 ieee80211_sta_reset_beacon_monitor(sdata);
3135
3136 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3137 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3138 len - baselen, false, &elems,
3139 care_about_ies, ncrc);
3140
3141 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3142 bool directed_tim = ieee80211_check_tim(elems.tim,
3143 elems.tim_len,
3144 ifmgd->aid);
3145 if (directed_tim) {
3146 if (local->hw.conf.dynamic_ps_timeout > 0) {
3147 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3148 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3149 ieee80211_hw_config(local,
3150 IEEE80211_CONF_CHANGE_PS);
3151 }
3152 ieee80211_send_nullfunc(local, sdata, 0);
3153 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3154 local->pspolling = true;
3155
3156 /*
3157 * Here is assumed that the driver will be
3158 * able to send ps-poll frame and receive a
3159 * response even though power save mode is
3160 * enabled, but some drivers might require
3161 * to disable power save here. This needs
3162 * to be investigated.
3163 */
3164 ieee80211_send_pspoll(local, sdata);
3165 }
3166 }
3167 }
3168
3169 if (sdata->vif.p2p) {
3170 struct ieee80211_p2p_noa_attr noa = {};
3171 int ret;
3172
3173 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3174 len - baselen,
3175 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3176 (u8 *) &noa, sizeof(noa));
3177 if (ret >= 2) {
3178 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3179 /* valid noa_attr and index changed */
3180 sdata->u.mgd.p2p_noa_index = noa.index;
3181 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3182 changed |= BSS_CHANGED_P2P_PS;
3183 /*
3184 * make sure we update all information, the CRC
3185 * mechanism doesn't look at P2P attributes.
3186 */
3187 ifmgd->beacon_crc_valid = false;
3188 }
3189 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3190 /* noa_attr not found and we had valid noa_attr before */
3191 sdata->u.mgd.p2p_noa_index = -1;
3192 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3193 changed |= BSS_CHANGED_P2P_PS;
3194 ifmgd->beacon_crc_valid = false;
3195 }
3196 }
3197
3198 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3199 return;
3200 ifmgd->beacon_crc = ncrc;
3201 ifmgd->beacon_crc_valid = true;
3202
3203 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3204
3205 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3206 &elems, true);
3207
3208 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3209 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3210 elems.wmm_param_len))
3211 changed |= BSS_CHANGED_QOS;
3212
3213 /*
3214 * If we haven't had a beacon before, tell the driver about the
3215 * DTIM period (and beacon timing if desired) now.
3216 */
3217 if (!ifmgd->have_beacon) {
3218 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3219 if (elems.tim)
3220 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3221 else
3222 bss_conf->dtim_period = 1;
3223
3224 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3225 sdata->vif.bss_conf.sync_tsf =
3226 le64_to_cpu(mgmt->u.beacon.timestamp);
3227 sdata->vif.bss_conf.sync_device_ts =
3228 rx_status->device_timestamp;
3229 if (elems.tim)
3230 sdata->vif.bss_conf.sync_dtim_count =
3231 elems.tim->dtim_count;
3232 else
3233 sdata->vif.bss_conf.sync_dtim_count = 0;
3234 }
3235
3236 changed |= BSS_CHANGED_BEACON_INFO;
3237 ifmgd->have_beacon = true;
3238
3239 mutex_lock(&local->iflist_mtx);
3240 ieee80211_recalc_ps(local, -1);
3241 mutex_unlock(&local->iflist_mtx);
3242
3243 ieee80211_recalc_ps_vif(sdata);
3244 }
3245
3246 if (elems.erp_info) {
3247 erp_valid = true;
3248 erp_value = elems.erp_info[0];
3249 } else {
3250 erp_valid = false;
3251 }
3252 changed |= ieee80211_handle_bss_capability(sdata,
3253 le16_to_cpu(mgmt->u.beacon.capab_info),
3254 erp_valid, erp_value);
3255
3256 mutex_lock(&local->sta_mtx);
3257 sta = sta_info_get(sdata, bssid);
3258
3259 if (ieee80211_config_bw(sdata, sta,
3260 elems.ht_cap_elem, elems.ht_operation,
3261 elems.vht_operation, bssid, &changed)) {
3262 mutex_unlock(&local->sta_mtx);
3263 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3264 WLAN_REASON_DEAUTH_LEAVING,
3265 true, deauth_buf);
3266 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3267 sizeof(deauth_buf));
3268 return;
3269 }
3270
3271 if (sta && elems.opmode_notif)
3272 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3273 rx_status->band, true);
3274 mutex_unlock(&local->sta_mtx);
3275
3276 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3277 elems.country_elem,
3278 elems.country_elem_len,
3279 elems.pwr_constr_elem,
3280 elems.cisco_dtpc_elem);
3281
3282 ieee80211_bss_info_change_notify(sdata, changed);
3283 }
3284
3285 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3286 struct sk_buff *skb)
3287 {
3288 struct ieee80211_rx_status *rx_status;
3289 struct ieee80211_mgmt *mgmt;
3290 u16 fc;
3291 struct ieee802_11_elems elems;
3292 int ies_len;
3293
3294 rx_status = (struct ieee80211_rx_status *) skb->cb;
3295 mgmt = (struct ieee80211_mgmt *) skb->data;
3296 fc = le16_to_cpu(mgmt->frame_control);
3297
3298 sdata_lock(sdata);
3299
3300 switch (fc & IEEE80211_FCTL_STYPE) {
3301 case IEEE80211_STYPE_BEACON:
3302 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3303 break;
3304 case IEEE80211_STYPE_PROBE_RESP:
3305 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3306 break;
3307 case IEEE80211_STYPE_AUTH:
3308 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3309 break;
3310 case IEEE80211_STYPE_DEAUTH:
3311 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3312 break;
3313 case IEEE80211_STYPE_DISASSOC:
3314 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3315 break;
3316 case IEEE80211_STYPE_ASSOC_RESP:
3317 case IEEE80211_STYPE_REASSOC_RESP:
3318 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3319 break;
3320 case IEEE80211_STYPE_ACTION:
3321 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3322 ies_len = skb->len -
3323 offsetof(struct ieee80211_mgmt,
3324 u.action.u.chan_switch.variable);
3325
3326 if (ies_len < 0)
3327 break;
3328
3329 ieee802_11_parse_elems(
3330 mgmt->u.action.u.chan_switch.variable,
3331 ies_len, true, &elems);
3332
3333 if (elems.parse_error)
3334 break;
3335
3336 ieee80211_sta_process_chanswitch(sdata,
3337 rx_status->mactime,
3338 &elems, false);
3339 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3340 ies_len = skb->len -
3341 offsetof(struct ieee80211_mgmt,
3342 u.action.u.ext_chan_switch.variable);
3343
3344 if (ies_len < 0)
3345 break;
3346
3347 ieee802_11_parse_elems(
3348 mgmt->u.action.u.ext_chan_switch.variable,
3349 ies_len, true, &elems);
3350
3351 if (elems.parse_error)
3352 break;
3353
3354 /* for the handling code pretend this was also an IE */
3355 elems.ext_chansw_ie =
3356 &mgmt->u.action.u.ext_chan_switch.data;
3357
3358 ieee80211_sta_process_chanswitch(sdata,
3359 rx_status->mactime,
3360 &elems, false);
3361 }
3362 break;
3363 }
3364 sdata_unlock(sdata);
3365 }
3366
3367 static void ieee80211_sta_timer(unsigned long data)
3368 {
3369 struct ieee80211_sub_if_data *sdata =
3370 (struct ieee80211_sub_if_data *) data;
3371
3372 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3373 }
3374
3375 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3376 u8 *bssid, u8 reason, bool tx)
3377 {
3378 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3379
3380 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3381 tx, frame_buf);
3382
3383 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3384 IEEE80211_DEAUTH_FRAME_LEN);
3385 }
3386
3387 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3388 {
3389 struct ieee80211_local *local = sdata->local;
3390 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3391 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3392 u32 tx_flags = 0;
3393
3394 sdata_assert_lock(sdata);
3395
3396 if (WARN_ON_ONCE(!auth_data))
3397 return -EINVAL;
3398
3399 auth_data->tries++;
3400
3401 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3402 sdata_info(sdata, "authentication with %pM timed out\n",
3403 auth_data->bss->bssid);
3404
3405 /*
3406 * Most likely AP is not in the range so remove the
3407 * bss struct for that AP.
3408 */
3409 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3410
3411 return -ETIMEDOUT;
3412 }
3413
3414 drv_mgd_prepare_tx(local, sdata);
3415
3416 if (auth_data->bss->proberesp_ies) {
3417 u16 trans = 1;
3418 u16 status = 0;
3419
3420 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3421 auth_data->bss->bssid, auth_data->tries,
3422 IEEE80211_AUTH_MAX_TRIES);
3423
3424 auth_data->expected_transaction = 2;
3425
3426 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3427 trans = auth_data->sae_trans;
3428 status = auth_data->sae_status;
3429 auth_data->expected_transaction = trans;
3430 }
3431
3432 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3433 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3434 IEEE80211_TX_INTFL_MLME_CONN_TX;
3435
3436 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3437 auth_data->data, auth_data->data_len,
3438 auth_data->bss->bssid,
3439 auth_data->bss->bssid, NULL, 0, 0,
3440 tx_flags);
3441 } else {
3442 const u8 *ssidie;
3443
3444 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3445 auth_data->bss->bssid, auth_data->tries,
3446 IEEE80211_AUTH_MAX_TRIES);
3447
3448 rcu_read_lock();
3449 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3450 if (!ssidie) {
3451 rcu_read_unlock();
3452 return -EINVAL;
3453 }
3454 /*
3455 * Direct probe is sent to broadcast address as some APs
3456 * will not answer to direct packet in unassociated state.
3457 */
3458 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3459 NULL, 0, (u32) -1, true, 0,
3460 auth_data->bss->channel, false);
3461 rcu_read_unlock();
3462 }
3463
3464 if (tx_flags == 0) {
3465 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3466 auth_data->timeout_started = true;
3467 run_again(sdata, auth_data->timeout);
3468 } else {
3469 auth_data->timeout =
3470 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3471 auth_data->timeout_started = true;
3472 run_again(sdata, auth_data->timeout);
3473 }
3474
3475 return 0;
3476 }
3477
3478 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3479 {
3480 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3481 struct ieee80211_local *local = sdata->local;
3482
3483 sdata_assert_lock(sdata);
3484
3485 assoc_data->tries++;
3486 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3487 sdata_info(sdata, "association with %pM timed out\n",
3488 assoc_data->bss->bssid);
3489
3490 /*
3491 * Most likely AP is not in the range so remove the
3492 * bss struct for that AP.
3493 */
3494 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3495
3496 return -ETIMEDOUT;
3497 }
3498
3499 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3500 assoc_data->bss->bssid, assoc_data->tries,
3501 IEEE80211_ASSOC_MAX_TRIES);
3502 ieee80211_send_assoc(sdata);
3503
3504 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3505 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3506 assoc_data->timeout_started = true;
3507 run_again(sdata, assoc_data->timeout);
3508 } else {
3509 assoc_data->timeout =
3510 round_jiffies_up(jiffies +
3511 IEEE80211_ASSOC_TIMEOUT_LONG);
3512 assoc_data->timeout_started = true;
3513 run_again(sdata, assoc_data->timeout);
3514 }
3515
3516 return 0;
3517 }
3518
3519 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3520 __le16 fc, bool acked)
3521 {
3522 struct ieee80211_local *local = sdata->local;
3523
3524 sdata->u.mgd.status_fc = fc;
3525 sdata->u.mgd.status_acked = acked;
3526 sdata->u.mgd.status_received = true;
3527
3528 ieee80211_queue_work(&local->hw, &sdata->work);
3529 }
3530
3531 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3532 {
3533 struct ieee80211_local *local = sdata->local;
3534 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3535
3536 sdata_lock(sdata);
3537
3538 if (ifmgd->status_received) {
3539 __le16 fc = ifmgd->status_fc;
3540 bool status_acked = ifmgd->status_acked;
3541
3542 ifmgd->status_received = false;
3543 if (ifmgd->auth_data &&
3544 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3545 if (status_acked) {
3546 ifmgd->auth_data->timeout =
3547 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3548 run_again(sdata, ifmgd->auth_data->timeout);
3549 } else {
3550 ifmgd->auth_data->timeout = jiffies - 1;
3551 }
3552 ifmgd->auth_data->timeout_started = true;
3553 } else if (ifmgd->assoc_data &&
3554 (ieee80211_is_assoc_req(fc) ||
3555 ieee80211_is_reassoc_req(fc))) {
3556 if (status_acked) {
3557 ifmgd->assoc_data->timeout =
3558 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3559 run_again(sdata, ifmgd->assoc_data->timeout);
3560 } else {
3561 ifmgd->assoc_data->timeout = jiffies - 1;
3562 }
3563 ifmgd->assoc_data->timeout_started = true;
3564 }
3565 }
3566
3567 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3568 time_after(jiffies, ifmgd->auth_data->timeout)) {
3569 if (ifmgd->auth_data->done) {
3570 /*
3571 * ok ... we waited for assoc but userspace didn't,
3572 * so let's just kill the auth data
3573 */
3574 ieee80211_destroy_auth_data(sdata, false);
3575 } else if (ieee80211_probe_auth(sdata)) {
3576 u8 bssid[ETH_ALEN];
3577
3578 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3579
3580 ieee80211_destroy_auth_data(sdata, false);
3581
3582 cfg80211_auth_timeout(sdata->dev, bssid);
3583 }
3584 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3585 run_again(sdata, ifmgd->auth_data->timeout);
3586
3587 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3588 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3589 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3590 ieee80211_do_assoc(sdata)) {
3591 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3592
3593 ieee80211_destroy_assoc_data(sdata, false);
3594 cfg80211_assoc_timeout(sdata->dev, bss);
3595 }
3596 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3597 run_again(sdata, ifmgd->assoc_data->timeout);
3598
3599 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3600 ifmgd->associated) {
3601 u8 bssid[ETH_ALEN];
3602 int max_tries;
3603
3604 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3605
3606 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3607 max_tries = max_nullfunc_tries;
3608 else
3609 max_tries = max_probe_tries;
3610
3611 /* ACK received for nullfunc probing frame */
3612 if (!ifmgd->probe_send_count)
3613 ieee80211_reset_ap_probe(sdata);
3614 else if (ifmgd->nullfunc_failed) {
3615 if (ifmgd->probe_send_count < max_tries) {
3616 mlme_dbg(sdata,
3617 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3618 bssid, ifmgd->probe_send_count,
3619 max_tries);
3620 ieee80211_mgd_probe_ap_send(sdata);
3621 } else {
3622 mlme_dbg(sdata,
3623 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3624 bssid);
3625 ieee80211_sta_connection_lost(sdata, bssid,
3626 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3627 false);
3628 }
3629 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3630 run_again(sdata, ifmgd->probe_timeout);
3631 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3632 mlme_dbg(sdata,
3633 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3634 bssid, probe_wait_ms);
3635 ieee80211_sta_connection_lost(sdata, bssid,
3636 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3637 } else if (ifmgd->probe_send_count < max_tries) {
3638 mlme_dbg(sdata,
3639 "No probe response from AP %pM after %dms, try %d/%i\n",
3640 bssid, probe_wait_ms,
3641 ifmgd->probe_send_count, max_tries);
3642 ieee80211_mgd_probe_ap_send(sdata);
3643 } else {
3644 /*
3645 * We actually lost the connection ... or did we?
3646 * Let's make sure!
3647 */
3648 wiphy_debug(local->hw.wiphy,
3649 "%s: No probe response from AP %pM"
3650 " after %dms, disconnecting.\n",
3651 sdata->name,
3652 bssid, probe_wait_ms);
3653
3654 ieee80211_sta_connection_lost(sdata, bssid,
3655 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3656 }
3657 }
3658
3659 sdata_unlock(sdata);
3660 }
3661
3662 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3663 {
3664 struct ieee80211_sub_if_data *sdata =
3665 (struct ieee80211_sub_if_data *) data;
3666 struct ieee80211_local *local = sdata->local;
3667
3668 if (local->quiescing)
3669 return;
3670
3671 if (sdata->vif.csa_active)
3672 return;
3673
3674 sdata->u.mgd.connection_loss = false;
3675 ieee80211_queue_work(&sdata->local->hw,
3676 &sdata->u.mgd.beacon_connection_loss_work);
3677 }
3678
3679 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3680 {
3681 struct ieee80211_sub_if_data *sdata =
3682 (struct ieee80211_sub_if_data *) data;
3683 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3684 struct ieee80211_local *local = sdata->local;
3685
3686 if (local->quiescing)
3687 return;
3688
3689 if (sdata->vif.csa_active)
3690 return;
3691
3692 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3693 }
3694
3695 static void ieee80211_sta_monitor_work(struct work_struct *work)
3696 {
3697 struct ieee80211_sub_if_data *sdata =
3698 container_of(work, struct ieee80211_sub_if_data,
3699 u.mgd.monitor_work);
3700
3701 ieee80211_mgd_probe_ap(sdata, false);
3702 }
3703
3704 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3705 {
3706 u32 flags;
3707
3708 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3709 __ieee80211_stop_poll(sdata);
3710
3711 /* let's probe the connection once */
3712 flags = sdata->local->hw.flags;
3713 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3714 ieee80211_queue_work(&sdata->local->hw,
3715 &sdata->u.mgd.monitor_work);
3716 /* and do all the other regular work too */
3717 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3718 }
3719 }
3720
3721 #ifdef CONFIG_PM
3722 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3723 {
3724 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3725 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3726
3727 sdata_lock(sdata);
3728
3729 if (ifmgd->auth_data || ifmgd->assoc_data) {
3730 const u8 *bssid = ifmgd->auth_data ?
3731 ifmgd->auth_data->bss->bssid :
3732 ifmgd->assoc_data->bss->bssid;
3733
3734 /*
3735 * If we are trying to authenticate / associate while suspending,
3736 * cfg80211 won't know and won't actually abort those attempts,
3737 * thus we need to do that ourselves.
3738 */
3739 ieee80211_send_deauth_disassoc(sdata, bssid,
3740 IEEE80211_STYPE_DEAUTH,
3741 WLAN_REASON_DEAUTH_LEAVING,
3742 false, frame_buf);
3743 if (ifmgd->assoc_data)
3744 ieee80211_destroy_assoc_data(sdata, false);
3745 if (ifmgd->auth_data)
3746 ieee80211_destroy_auth_data(sdata, false);
3747 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3748 IEEE80211_DEAUTH_FRAME_LEN);
3749 }
3750
3751 sdata_unlock(sdata);
3752 }
3753
3754 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3755 {
3756 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3757
3758 sdata_lock(sdata);
3759 if (!ifmgd->associated) {
3760 sdata_unlock(sdata);
3761 return;
3762 }
3763
3764 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3765 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3766 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3767 ieee80211_sta_connection_lost(sdata,
3768 ifmgd->associated->bssid,
3769 WLAN_REASON_UNSPECIFIED,
3770 true);
3771 sdata_unlock(sdata);
3772 return;
3773 }
3774 sdata_unlock(sdata);
3775 }
3776 #endif
3777
3778 /* interface setup */
3779 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3780 {
3781 struct ieee80211_if_managed *ifmgd;
3782
3783 ifmgd = &sdata->u.mgd;
3784 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3785 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3786 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3787 ieee80211_beacon_connection_loss_work);
3788 INIT_WORK(&ifmgd->csa_connection_drop_work,
3789 ieee80211_csa_connection_drop_work);
3790 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
3791 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
3792 ieee80211_tdls_peer_del_work);
3793 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3794 (unsigned long) sdata);
3795 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3796 (unsigned long) sdata);
3797 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3798 (unsigned long) sdata);
3799 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3800 (unsigned long) sdata);
3801
3802 ifmgd->flags = 0;
3803 ifmgd->powersave = sdata->wdev.ps;
3804 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3805 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3806 ifmgd->p2p_noa_index = -1;
3807
3808 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
3809 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3810 else
3811 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3812 }
3813
3814 /* scan finished notification */
3815 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3816 {
3817 struct ieee80211_sub_if_data *sdata;
3818
3819 /* Restart STA timers */
3820 rcu_read_lock();
3821 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3822 if (ieee80211_sdata_running(sdata))
3823 ieee80211_restart_sta_timer(sdata);
3824 }
3825 rcu_read_unlock();
3826 }
3827
3828 int ieee80211_max_network_latency(struct notifier_block *nb,
3829 unsigned long data, void *dummy)
3830 {
3831 s32 latency_usec = (s32) data;
3832 struct ieee80211_local *local =
3833 container_of(nb, struct ieee80211_local,
3834 network_latency_notifier);
3835
3836 mutex_lock(&local->iflist_mtx);
3837 ieee80211_recalc_ps(local, latency_usec);
3838 mutex_unlock(&local->iflist_mtx);
3839
3840 return NOTIFY_OK;
3841 }
3842
3843 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3844 struct cfg80211_bss *cbss)
3845 {
3846 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3847 const u8 *ht_cap_ie, *vht_cap_ie;
3848 const struct ieee80211_ht_cap *ht_cap;
3849 const struct ieee80211_vht_cap *vht_cap;
3850 u8 chains = 1;
3851
3852 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3853 return chains;
3854
3855 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3856 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3857 ht_cap = (void *)(ht_cap_ie + 2);
3858 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3859 /*
3860 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3861 * "Tx Unequal Modulation Supported" fields.
3862 */
3863 }
3864
3865 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3866 return chains;
3867
3868 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3869 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3870 u8 nss;
3871 u16 tx_mcs_map;
3872
3873 vht_cap = (void *)(vht_cap_ie + 2);
3874 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3875 for (nss = 8; nss > 0; nss--) {
3876 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3877 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3878 break;
3879 }
3880 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3881 chains = max(chains, nss);
3882 }
3883
3884 return chains;
3885 }
3886
3887 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3888 struct cfg80211_bss *cbss)
3889 {
3890 struct ieee80211_local *local = sdata->local;
3891 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3892 const struct ieee80211_ht_cap *ht_cap = NULL;
3893 const struct ieee80211_ht_operation *ht_oper = NULL;
3894 const struct ieee80211_vht_operation *vht_oper = NULL;
3895 struct ieee80211_supported_band *sband;
3896 struct cfg80211_chan_def chandef;
3897 int ret;
3898
3899 sband = local->hw.wiphy->bands[cbss->channel->band];
3900
3901 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3902 IEEE80211_STA_DISABLE_80P80MHZ |
3903 IEEE80211_STA_DISABLE_160MHZ);
3904
3905 rcu_read_lock();
3906
3907 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3908 sband->ht_cap.ht_supported) {
3909 const u8 *ht_oper_ie, *ht_cap_ie;
3910
3911 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3912 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3913 ht_oper = (void *)(ht_oper_ie + 2);
3914
3915 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3916 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
3917 ht_cap = (void *)(ht_cap_ie + 2);
3918
3919 if (!ht_cap) {
3920 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3921 ht_oper = NULL;
3922 }
3923 }
3924
3925 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3926 sband->vht_cap.vht_supported) {
3927 const u8 *vht_oper_ie, *vht_cap;
3928
3929 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3930 WLAN_EID_VHT_OPERATION);
3931 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3932 vht_oper = (void *)(vht_oper_ie + 2);
3933 if (vht_oper && !ht_oper) {
3934 vht_oper = NULL;
3935 sdata_info(sdata,
3936 "AP advertised VHT without HT, disabling both\n");
3937 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3938 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3939 }
3940
3941 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3942 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3943 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3944 vht_oper = NULL;
3945 }
3946 }
3947
3948 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3949 cbss->channel,
3950 ht_cap, ht_oper, vht_oper,
3951 &chandef, false);
3952
3953 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3954 local->rx_chains);
3955
3956 rcu_read_unlock();
3957
3958 /* will change later if needed */
3959 sdata->smps_mode = IEEE80211_SMPS_OFF;
3960
3961 mutex_lock(&local->mtx);
3962 /*
3963 * If this fails (possibly due to channel context sharing
3964 * on incompatible channels, e.g. 80+80 and 160 sharing the
3965 * same control channel) try to use a smaller bandwidth.
3966 */
3967 ret = ieee80211_vif_use_channel(sdata, &chandef,
3968 IEEE80211_CHANCTX_SHARED);
3969
3970 /* don't downgrade for 5 and 10 MHz channels, though. */
3971 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3972 chandef.width == NL80211_CHAN_WIDTH_10)
3973 goto out;
3974
3975 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3976 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
3977 ret = ieee80211_vif_use_channel(sdata, &chandef,
3978 IEEE80211_CHANCTX_SHARED);
3979 }
3980 out:
3981 mutex_unlock(&local->mtx);
3982 return ret;
3983 }
3984
3985 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3986 struct cfg80211_bss *cbss, bool assoc)
3987 {
3988 struct ieee80211_local *local = sdata->local;
3989 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3990 struct ieee80211_bss *bss = (void *)cbss->priv;
3991 struct sta_info *new_sta = NULL;
3992 bool have_sta = false;
3993 int err;
3994
3995 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3996 return -EINVAL;
3997
3998 if (assoc) {
3999 rcu_read_lock();
4000 have_sta = sta_info_get(sdata, cbss->bssid);
4001 rcu_read_unlock();
4002 }
4003
4004 if (!have_sta) {
4005 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4006 if (!new_sta)
4007 return -ENOMEM;
4008 }
4009 if (new_sta) {
4010 u32 rates = 0, basic_rates = 0;
4011 bool have_higher_than_11mbit;
4012 int min_rate = INT_MAX, min_rate_index = -1;
4013 struct ieee80211_chanctx_conf *chanctx_conf;
4014 struct ieee80211_supported_band *sband;
4015 const struct cfg80211_bss_ies *ies;
4016 int shift;
4017 u32 rate_flags;
4018
4019 sband = local->hw.wiphy->bands[cbss->channel->band];
4020
4021 err = ieee80211_prep_channel(sdata, cbss);
4022 if (err) {
4023 sta_info_free(local, new_sta);
4024 return -EINVAL;
4025 }
4026 shift = ieee80211_vif_get_shift(&sdata->vif);
4027
4028 rcu_read_lock();
4029 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4030 if (WARN_ON(!chanctx_conf)) {
4031 rcu_read_unlock();
4032 sta_info_free(local, new_sta);
4033 return -EINVAL;
4034 }
4035 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4036 rcu_read_unlock();
4037
4038 ieee80211_get_rates(sband, bss->supp_rates,
4039 bss->supp_rates_len,
4040 &rates, &basic_rates,
4041 &have_higher_than_11mbit,
4042 &min_rate, &min_rate_index,
4043 shift, rate_flags);
4044
4045 /*
4046 * This used to be a workaround for basic rates missing
4047 * in the association response frame. Now that we no
4048 * longer use the basic rates from there, it probably
4049 * doesn't happen any more, but keep the workaround so
4050 * in case some *other* APs are buggy in different ways
4051 * we can connect -- with a warning.
4052 */
4053 if (!basic_rates && min_rate_index >= 0) {
4054 sdata_info(sdata,
4055 "No basic rates, using min rate instead\n");
4056 basic_rates = BIT(min_rate_index);
4057 }
4058
4059 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4060 sdata->vif.bss_conf.basic_rates = basic_rates;
4061
4062 /* cf. IEEE 802.11 9.2.12 */
4063 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4064 have_higher_than_11mbit)
4065 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4066 else
4067 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4068
4069 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4070
4071 /* set timing information */
4072 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4073 rcu_read_lock();
4074 ies = rcu_dereference(cbss->beacon_ies);
4075 if (ies) {
4076 const u8 *tim_ie;
4077
4078 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4079 sdata->vif.bss_conf.sync_device_ts =
4080 bss->device_ts_beacon;
4081 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4082 ies->data, ies->len);
4083 if (tim_ie && tim_ie[1] >= 2)
4084 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4085 else
4086 sdata->vif.bss_conf.sync_dtim_count = 0;
4087 } else if (!(local->hw.flags &
4088 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4089 ies = rcu_dereference(cbss->proberesp_ies);
4090 /* must be non-NULL since beacon IEs were NULL */
4091 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4092 sdata->vif.bss_conf.sync_device_ts =
4093 bss->device_ts_presp;
4094 sdata->vif.bss_conf.sync_dtim_count = 0;
4095 } else {
4096 sdata->vif.bss_conf.sync_tsf = 0;
4097 sdata->vif.bss_conf.sync_device_ts = 0;
4098 sdata->vif.bss_conf.sync_dtim_count = 0;
4099 }
4100 rcu_read_unlock();
4101
4102 /* tell driver about BSSID, basic rates and timing */
4103 ieee80211_bss_info_change_notify(sdata,
4104 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4105 BSS_CHANGED_BEACON_INT);
4106
4107 if (assoc)
4108 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4109
4110 err = sta_info_insert(new_sta);
4111 new_sta = NULL;
4112 if (err) {
4113 sdata_info(sdata,
4114 "failed to insert STA entry for the AP (error %d)\n",
4115 err);
4116 return err;
4117 }
4118 } else
4119 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4120
4121 return 0;
4122 }
4123
4124 /* config hooks */
4125 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4126 struct cfg80211_auth_request *req)
4127 {
4128 struct ieee80211_local *local = sdata->local;
4129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4130 struct ieee80211_mgd_auth_data *auth_data;
4131 u16 auth_alg;
4132 int err;
4133
4134 /* prepare auth data structure */
4135
4136 switch (req->auth_type) {
4137 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4138 auth_alg = WLAN_AUTH_OPEN;
4139 break;
4140 case NL80211_AUTHTYPE_SHARED_KEY:
4141 if (IS_ERR(local->wep_tx_tfm))
4142 return -EOPNOTSUPP;
4143 auth_alg = WLAN_AUTH_SHARED_KEY;
4144 break;
4145 case NL80211_AUTHTYPE_FT:
4146 auth_alg = WLAN_AUTH_FT;
4147 break;
4148 case NL80211_AUTHTYPE_NETWORK_EAP:
4149 auth_alg = WLAN_AUTH_LEAP;
4150 break;
4151 case NL80211_AUTHTYPE_SAE:
4152 auth_alg = WLAN_AUTH_SAE;
4153 break;
4154 default:
4155 return -EOPNOTSUPP;
4156 }
4157
4158 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4159 req->ie_len, GFP_KERNEL);
4160 if (!auth_data)
4161 return -ENOMEM;
4162
4163 auth_data->bss = req->bss;
4164
4165 if (req->sae_data_len >= 4) {
4166 __le16 *pos = (__le16 *) req->sae_data;
4167 auth_data->sae_trans = le16_to_cpu(pos[0]);
4168 auth_data->sae_status = le16_to_cpu(pos[1]);
4169 memcpy(auth_data->data, req->sae_data + 4,
4170 req->sae_data_len - 4);
4171 auth_data->data_len += req->sae_data_len - 4;
4172 }
4173
4174 if (req->ie && req->ie_len) {
4175 memcpy(&auth_data->data[auth_data->data_len],
4176 req->ie, req->ie_len);
4177 auth_data->data_len += req->ie_len;
4178 }
4179
4180 if (req->key && req->key_len) {
4181 auth_data->key_len = req->key_len;
4182 auth_data->key_idx = req->key_idx;
4183 memcpy(auth_data->key, req->key, req->key_len);
4184 }
4185
4186 auth_data->algorithm = auth_alg;
4187
4188 /* try to authenticate/probe */
4189
4190 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4191 ifmgd->assoc_data) {
4192 err = -EBUSY;
4193 goto err_free;
4194 }
4195
4196 if (ifmgd->auth_data)
4197 ieee80211_destroy_auth_data(sdata, false);
4198
4199 /* prep auth_data so we don't go into idle on disassoc */
4200 ifmgd->auth_data = auth_data;
4201
4202 if (ifmgd->associated) {
4203 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4204
4205 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4206 WLAN_REASON_UNSPECIFIED,
4207 false, frame_buf);
4208
4209 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4210 sizeof(frame_buf));
4211 }
4212
4213 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4214
4215 err = ieee80211_prep_connection(sdata, req->bss, false);
4216 if (err)
4217 goto err_clear;
4218
4219 err = ieee80211_probe_auth(sdata);
4220 if (err) {
4221 sta_info_destroy_addr(sdata, req->bss->bssid);
4222 goto err_clear;
4223 }
4224
4225 /* hold our own reference */
4226 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4227 return 0;
4228
4229 err_clear:
4230 memset(ifmgd->bssid, 0, ETH_ALEN);
4231 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4232 ifmgd->auth_data = NULL;
4233 err_free:
4234 kfree(auth_data);
4235 return err;
4236 }
4237
4238 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4239 const u8 *wmm_param, int len)
4240 {
4241 const u8 *pos;
4242 size_t left;
4243
4244 if (len < 8)
4245 return false;
4246
4247 if (wmm_param[5] != 1 /* version */)
4248 return false;
4249
4250 pos = wmm_param + 8;
4251 left = len - 8;
4252
4253 for (; left >= 4; left -= 4, pos += 4) {
4254 u8 aifsn = pos[0] & 0x0f;
4255 u8 ecwmin = pos[1] & 0x0f;
4256 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4257 int aci = (pos[0] >> 5) & 0x03;
4258
4259 if (aifsn < 2) {
4260 sdata_info(sdata,
4261 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4262 aifsn, aci);
4263 return false;
4264 }
4265 if (ecwmin > ecwmax) {
4266 sdata_info(sdata,
4267 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4268 ecwmin, ecwmax, aci);
4269 return false;
4270 }
4271 }
4272
4273 return true;
4274 }
4275
4276 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4277 struct cfg80211_assoc_request *req)
4278 {
4279 struct ieee80211_local *local = sdata->local;
4280 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4281 struct ieee80211_bss *bss = (void *)req->bss->priv;
4282 struct ieee80211_mgd_assoc_data *assoc_data;
4283 const struct cfg80211_bss_ies *beacon_ies;
4284 struct ieee80211_supported_band *sband;
4285 const u8 *ssidie, *ht_ie, *vht_ie;
4286 int i, err;
4287
4288 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4289 if (!assoc_data)
4290 return -ENOMEM;
4291
4292 rcu_read_lock();
4293 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4294 if (!ssidie) {
4295 rcu_read_unlock();
4296 kfree(assoc_data);
4297 return -EINVAL;
4298 }
4299 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4300 assoc_data->ssid_len = ssidie[1];
4301 rcu_read_unlock();
4302
4303 if (ifmgd->associated) {
4304 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4305
4306 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4307 WLAN_REASON_UNSPECIFIED,
4308 false, frame_buf);
4309
4310 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4311 sizeof(frame_buf));
4312 }
4313
4314 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4315 err = -EBUSY;
4316 goto err_free;
4317 }
4318
4319 if (ifmgd->assoc_data) {
4320 err = -EBUSY;
4321 goto err_free;
4322 }
4323
4324 if (ifmgd->auth_data) {
4325 bool match;
4326
4327 /* keep sta info, bssid if matching */
4328 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4329 ieee80211_destroy_auth_data(sdata, match);
4330 }
4331
4332 /* prepare assoc data */
4333
4334 ifmgd->beacon_crc_valid = false;
4335
4336 assoc_data->wmm = bss->wmm_used &&
4337 (local->hw.queues >= IEEE80211_NUM_ACS);
4338 if (assoc_data->wmm) {
4339 /* try to check validity of WMM params IE */
4340 const struct cfg80211_bss_ies *ies;
4341 const u8 *wp, *start, *end;
4342
4343 rcu_read_lock();
4344 ies = rcu_dereference(req->bss->ies);
4345 start = ies->data;
4346 end = start + ies->len;
4347
4348 while (true) {
4349 wp = cfg80211_find_vendor_ie(
4350 WLAN_OUI_MICROSOFT,
4351 WLAN_OUI_TYPE_MICROSOFT_WMM,
4352 start, end - start);
4353 if (!wp)
4354 break;
4355 start = wp + wp[1] + 2;
4356 /* if this IE is too short, try the next */
4357 if (wp[1] <= 4)
4358 continue;
4359 /* if this IE is WMM params, we found what we wanted */
4360 if (wp[6] == 1)
4361 break;
4362 }
4363
4364 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4365 wp[1] - 2)) {
4366 assoc_data->wmm = false;
4367 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4368 }
4369 rcu_read_unlock();
4370 }
4371
4372 /*
4373 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4374 * We still associate in non-HT mode (11a/b/g) if any one of these
4375 * ciphers is configured as pairwise.
4376 * We can set this to true for non-11n hardware, that'll be checked
4377 * separately along with the peer capabilities.
4378 */
4379 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4380 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4381 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4382 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4383 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4384 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4385 netdev_info(sdata->dev,
4386 "disabling HT/VHT due to WEP/TKIP use\n");
4387 }
4388 }
4389
4390 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4391 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4392 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4393 }
4394
4395 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4396 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4397
4398 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4399 sband = local->hw.wiphy->bands[req->bss->channel->band];
4400 if (!sband->ht_cap.ht_supported ||
4401 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4402 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4403 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4404 if (!bss->wmm_used &&
4405 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4406 netdev_info(sdata->dev,
4407 "disabling HT as WMM/QoS is not supported by the AP\n");
4408 }
4409
4410 /* disable VHT if we don't support it or the AP doesn't use WMM */
4411 if (!sband->vht_cap.vht_supported ||
4412 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4413 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4414 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4415 if (!bss->wmm_used &&
4416 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4417 netdev_info(sdata->dev,
4418 "disabling VHT as WMM/QoS is not supported by the AP\n");
4419 }
4420
4421 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4422 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4423 sizeof(ifmgd->ht_capa_mask));
4424
4425 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4426 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4427 sizeof(ifmgd->vht_capa_mask));
4428
4429 if (req->ie && req->ie_len) {
4430 memcpy(assoc_data->ie, req->ie, req->ie_len);
4431 assoc_data->ie_len = req->ie_len;
4432 }
4433
4434 assoc_data->bss = req->bss;
4435
4436 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4437 if (ifmgd->powersave)
4438 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4439 else
4440 sdata->smps_mode = IEEE80211_SMPS_OFF;
4441 } else
4442 sdata->smps_mode = ifmgd->req_smps;
4443
4444 assoc_data->capability = req->bss->capability;
4445 assoc_data->supp_rates = bss->supp_rates;
4446 assoc_data->supp_rates_len = bss->supp_rates_len;
4447
4448 rcu_read_lock();
4449 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4450 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4451 assoc_data->ap_ht_param =
4452 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4453 else
4454 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4455 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4456 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4457 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4458 sizeof(struct ieee80211_vht_cap));
4459 else
4460 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4461 rcu_read_unlock();
4462
4463 if (bss->wmm_used && bss->uapsd_supported &&
4464 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
4465 assoc_data->uapsd = true;
4466 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4467 } else {
4468 assoc_data->uapsd = false;
4469 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4470 }
4471
4472 if (req->prev_bssid)
4473 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4474
4475 if (req->use_mfp) {
4476 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4477 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4478 } else {
4479 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4480 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4481 }
4482
4483 if (req->flags & ASSOC_REQ_USE_RRM)
4484 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4485 else
4486 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4487
4488 if (req->crypto.control_port)
4489 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4490 else
4491 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4492
4493 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4494 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4495 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4496 sdata->vif.type);
4497
4498 /* kick off associate process */
4499
4500 ifmgd->assoc_data = assoc_data;
4501 ifmgd->dtim_period = 0;
4502 ifmgd->have_beacon = false;
4503
4504 err = ieee80211_prep_connection(sdata, req->bss, true);
4505 if (err)
4506 goto err_clear;
4507
4508 rcu_read_lock();
4509 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4510
4511 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4512 !beacon_ies) {
4513 /*
4514 * Wait up to one beacon interval ...
4515 * should this be more if we miss one?
4516 */
4517 sdata_info(sdata, "waiting for beacon from %pM\n",
4518 ifmgd->bssid);
4519 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4520 assoc_data->timeout_started = true;
4521 assoc_data->need_beacon = true;
4522 } else if (beacon_ies) {
4523 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4524 beacon_ies->data,
4525 beacon_ies->len);
4526 u8 dtim_count = 0;
4527
4528 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4529 const struct ieee80211_tim_ie *tim;
4530 tim = (void *)(tim_ie + 2);
4531 ifmgd->dtim_period = tim->dtim_period;
4532 dtim_count = tim->dtim_count;
4533 }
4534 ifmgd->have_beacon = true;
4535 assoc_data->timeout = jiffies;
4536 assoc_data->timeout_started = true;
4537
4538 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4539 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4540 sdata->vif.bss_conf.sync_device_ts =
4541 bss->device_ts_beacon;
4542 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4543 }
4544 } else {
4545 assoc_data->timeout = jiffies;
4546 assoc_data->timeout_started = true;
4547 }
4548 rcu_read_unlock();
4549
4550 run_again(sdata, assoc_data->timeout);
4551
4552 if (bss->corrupt_data) {
4553 char *corrupt_type = "data";
4554 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4555 if (bss->corrupt_data &
4556 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4557 corrupt_type = "beacon and probe response";
4558 else
4559 corrupt_type = "beacon";
4560 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4561 corrupt_type = "probe response";
4562 sdata_info(sdata, "associating with AP with corrupt %s\n",
4563 corrupt_type);
4564 }
4565
4566 return 0;
4567 err_clear:
4568 memset(ifmgd->bssid, 0, ETH_ALEN);
4569 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4570 ifmgd->assoc_data = NULL;
4571 err_free:
4572 kfree(assoc_data);
4573 return err;
4574 }
4575
4576 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4577 struct cfg80211_deauth_request *req)
4578 {
4579 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4580 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4581 bool tx = !req->local_state_change;
4582
4583 if (ifmgd->auth_data &&
4584 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4585 sdata_info(sdata,
4586 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4587 req->bssid, req->reason_code,
4588 ieee80211_get_reason_code_string(req->reason_code));
4589
4590 drv_mgd_prepare_tx(sdata->local, sdata);
4591 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4592 IEEE80211_STYPE_DEAUTH,
4593 req->reason_code, tx,
4594 frame_buf);
4595 ieee80211_destroy_auth_data(sdata, false);
4596 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4597 IEEE80211_DEAUTH_FRAME_LEN);
4598
4599 return 0;
4600 }
4601
4602 if (ifmgd->associated &&
4603 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4604 sdata_info(sdata,
4605 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4606 req->bssid, req->reason_code,
4607 ieee80211_get_reason_code_string(req->reason_code));
4608
4609 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4610 req->reason_code, tx, frame_buf);
4611 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4612 IEEE80211_DEAUTH_FRAME_LEN);
4613 return 0;
4614 }
4615
4616 return -ENOTCONN;
4617 }
4618
4619 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4620 struct cfg80211_disassoc_request *req)
4621 {
4622 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4623 u8 bssid[ETH_ALEN];
4624 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4625
4626 /*
4627 * cfg80211 should catch this ... but it's racy since
4628 * we can receive a disassoc frame, process it, hand it
4629 * to cfg80211 while that's in a locked section already
4630 * trying to tell us that the user wants to disconnect.
4631 */
4632 if (ifmgd->associated != req->bss)
4633 return -ENOLINK;
4634
4635 sdata_info(sdata,
4636 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4637 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4638
4639 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4640 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4641 req->reason_code, !req->local_state_change,
4642 frame_buf);
4643
4644 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4645 IEEE80211_DEAUTH_FRAME_LEN);
4646
4647 return 0;
4648 }
4649
4650 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4651 {
4652 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4653
4654 /*
4655 * Make sure some work items will not run after this,
4656 * they will not do anything but might not have been
4657 * cancelled when disconnecting.
4658 */
4659 cancel_work_sync(&ifmgd->monitor_work);
4660 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4661 cancel_work_sync(&ifmgd->request_smps_work);
4662 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4663 cancel_work_sync(&ifmgd->chswitch_work);
4664 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
4665
4666 sdata_lock(sdata);
4667 if (ifmgd->assoc_data) {
4668 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4669 ieee80211_destroy_assoc_data(sdata, false);
4670 cfg80211_assoc_timeout(sdata->dev, bss);
4671 }
4672 if (ifmgd->auth_data)
4673 ieee80211_destroy_auth_data(sdata, false);
4674 del_timer_sync(&ifmgd->timer);
4675 sdata_unlock(sdata);
4676 }
4677
4678 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4679 enum nl80211_cqm_rssi_threshold_event rssi_event,
4680 gfp_t gfp)
4681 {
4682 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4683
4684 trace_api_cqm_rssi_notify(sdata, rssi_event);
4685
4686 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4687 }
4688 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
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