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x86/mm: Add TLB purge to free pmd/pte page interfaces
[linux/fpc-iii.git] / net / mac80211 / mlme.c
blobe6f42d12222ef0e4683b606244cc129f790607d7
1 /*
2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 * Copyright (C) 2015 - 2016 Intel Deutschland GmbH
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15
16 #include <linux/delay.h>
17 #include <linux/if_ether.h>
18 #include <linux/skbuff.h>
19 #include <linux/if_arp.h>
20 #include <linux/etherdevice.h>
21 #include <linux/moduleparam.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/crc32.h>
24 #include <linux/slab.h>
25 #include <linux/export.h>
26 #include <net/mac80211.h>
27 #include <asm/unaligned.h>
28
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
31 #include "rate.h"
32 #include "led.h"
33
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 * How many Beacon frames need to have been used in average signal strength
85 * before starting to indicate signal change events.
86 */
87 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
88
89 /*
90 * We can have multiple work items (and connection probing)
91 * scheduling this timer, but we need to take care to only
92 * reschedule it when it should fire _earlier_ than it was
93 * asked for before, or if it's not pending right now. This
94 * function ensures that. Note that it then is required to
95 * run this function for all timeouts after the first one
96 * has happened -- the work that runs from this timer will
97 * do that.
98 */
99 static void run_again(struct ieee80211_sub_if_data *sdata,
100 unsigned long timeout)
101 {
102 sdata_assert_lock(sdata);
103
104 if (!timer_pending(&sdata->u.mgd.timer) ||
105 time_before(timeout, sdata->u.mgd.timer.expires))
106 mod_timer(&sdata->u.mgd.timer, timeout);
107 }
108
109 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
110 {
111 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
112 return;
113
114 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
115 return;
116
117 mod_timer(&sdata->u.mgd.bcn_mon_timer,
118 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
119 }
120
121 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
122 {
123 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
124
125 if (unlikely(!ifmgd->associated))
126 return;
127
128 if (ifmgd->probe_send_count)
129 ifmgd->probe_send_count = 0;
130
131 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
132 return;
133
134 mod_timer(&ifmgd->conn_mon_timer,
135 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
136 }
137
138 static int ecw2cw(int ecw)
139 {
140 return (1 << ecw) - 1;
141 }
142
143 static u32
144 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
145 struct ieee80211_supported_band *sband,
146 struct ieee80211_channel *channel,
147 const struct ieee80211_ht_cap *ht_cap,
148 const struct ieee80211_ht_operation *ht_oper,
149 const struct ieee80211_vht_operation *vht_oper,
150 struct cfg80211_chan_def *chandef, bool tracking)
151 {
152 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
153 struct cfg80211_chan_def vht_chandef;
154 struct ieee80211_sta_ht_cap sta_ht_cap;
155 u32 ht_cfreq, ret;
156
157 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
158 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
159
160 chandef->chan = channel;
161 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
162 chandef->center_freq1 = channel->center_freq;
163 chandef->center_freq2 = 0;
164
165 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
166 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
167 goto out;
168 }
169
170 chandef->width = NL80211_CHAN_WIDTH_20;
171
172 if (!(ht_cap->cap_info &
173 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
174 ret = IEEE80211_STA_DISABLE_40MHZ;
175 vht_chandef = *chandef;
176 goto out;
177 }
178
179 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
180 channel->band);
181 /* check that channel matches the right operating channel */
182 if (!tracking && channel->center_freq != ht_cfreq) {
183 /*
184 * It's possible that some APs are confused here;
185 * Netgear WNDR3700 sometimes reports 4 higher than
186 * the actual channel in association responses, but
187 * since we look at probe response/beacon data here
188 * it should be OK.
189 */
190 sdata_info(sdata,
191 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
192 channel->center_freq, ht_cfreq,
193 ht_oper->primary_chan, channel->band);
194 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
195 goto out;
196 }
197
198 /* check 40 MHz support, if we have it */
199 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
200 ieee80211_chandef_ht_oper(ht_oper, chandef);
201 } else {
202 /* 40 MHz (and 80 MHz) must be supported for VHT */
203 ret = IEEE80211_STA_DISABLE_VHT;
204 /* also mark 40 MHz disabled */
205 ret |= IEEE80211_STA_DISABLE_40MHZ;
206 goto out;
207 }
208
209 if (!vht_oper || !sband->vht_cap.vht_supported) {
210 ret = IEEE80211_STA_DISABLE_VHT;
211 goto out;
212 }
213
214 vht_chandef = *chandef;
215 if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) {
216 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
217 sdata_info(sdata,
218 "AP VHT information is invalid, disable VHT\n");
219 ret = IEEE80211_STA_DISABLE_VHT;
220 goto out;
221 }
222
223 if (!cfg80211_chandef_valid(&vht_chandef)) {
224 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
225 sdata_info(sdata,
226 "AP VHT information is invalid, disable VHT\n");
227 ret = IEEE80211_STA_DISABLE_VHT;
228 goto out;
229 }
230
231 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
232 ret = 0;
233 goto out;
234 }
235
236 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
237 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
238 sdata_info(sdata,
239 "AP VHT information doesn't match HT, disable VHT\n");
240 ret = IEEE80211_STA_DISABLE_VHT;
241 goto out;
242 }
243
244 *chandef = vht_chandef;
245
246 ret = 0;
247
248 out:
249 /*
250 * When tracking the current AP, don't do any further checks if the
251 * new chandef is identical to the one we're currently using for the
252 * connection. This keeps us from playing ping-pong with regulatory,
253 * without it the following can happen (for example):
254 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
255 * - AP advertises regdom US
256 * - CRDA loads regdom US with 80 MHz prohibited (old database)
257 * - the code below detects an unsupported channel, downgrades, and
258 * we disconnect from the AP in the caller
259 * - disconnect causes CRDA to reload world regdomain and the game
260 * starts anew.
261 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
262 *
263 * It seems possible that there are still scenarios with CSA or real
264 * bandwidth changes where a this could happen, but those cases are
265 * less common and wouldn't completely prevent using the AP.
266 */
267 if (tracking &&
268 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
269 return ret;
270
271 /* don't print the message below for VHT mismatch if VHT is disabled */
272 if (ret & IEEE80211_STA_DISABLE_VHT)
273 vht_chandef = *chandef;
274
275 /*
276 * Ignore the DISABLED flag when we're already connected and only
277 * tracking the APs beacon for bandwidth changes - otherwise we
278 * might get disconnected here if we connect to an AP, update our
279 * regulatory information based on the AP's country IE and the
280 * information we have is wrong/outdated and disables the channel
281 * that we're actually using for the connection to the AP.
282 */
283 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
284 tracking ? 0 :
285 IEEE80211_CHAN_DISABLED)) {
286 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
287 ret = IEEE80211_STA_DISABLE_HT |
288 IEEE80211_STA_DISABLE_VHT;
289 break;
290 }
291
292 ret |= ieee80211_chandef_downgrade(chandef);
293 }
294
295 if (chandef->width != vht_chandef.width && !tracking)
296 sdata_info(sdata,
297 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
298
299 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
300 return ret;
301 }
302
303 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
304 struct sta_info *sta,
305 const struct ieee80211_ht_cap *ht_cap,
306 const struct ieee80211_ht_operation *ht_oper,
307 const struct ieee80211_vht_operation *vht_oper,
308 const u8 *bssid, u32 *changed)
309 {
310 struct ieee80211_local *local = sdata->local;
311 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
312 struct ieee80211_supported_band *sband;
313 struct ieee80211_channel *chan;
314 struct cfg80211_chan_def chandef;
315 u16 ht_opmode;
316 u32 flags;
317 enum ieee80211_sta_rx_bandwidth new_sta_bw;
318 int ret;
319
320 /* if HT was/is disabled, don't track any bandwidth changes */
321 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
322 return 0;
323
324 /* don't check VHT if we associated as non-VHT station */
325 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
326 vht_oper = NULL;
327
328 if (WARN_ON_ONCE(!sta))
329 return -EINVAL;
330
331 /*
332 * if bss configuration changed store the new one -
333 * this may be applicable even if channel is identical
334 */
335 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
336 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
337 *changed |= BSS_CHANGED_HT;
338 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
339 }
340
341 chan = sdata->vif.bss_conf.chandef.chan;
342 sband = local->hw.wiphy->bands[chan->band];
343
344 /* calculate new channel (type) based on HT/VHT operation IEs */
345 flags = ieee80211_determine_chantype(sdata, sband, chan,
346 ht_cap, ht_oper, vht_oper,
347 &chandef, true);
348
349 /*
350 * Downgrade the new channel if we associated with restricted
351 * capabilities. For example, if we associated as a 20 MHz STA
352 * to a 40 MHz AP (due to regulatory, capabilities or config
353 * reasons) then switching to a 40 MHz channel now won't do us
354 * any good -- we couldn't use it with the AP.
355 */
356 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
357 chandef.width == NL80211_CHAN_WIDTH_80P80)
358 flags |= ieee80211_chandef_downgrade(&chandef);
359 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
360 chandef.width == NL80211_CHAN_WIDTH_160)
361 flags |= ieee80211_chandef_downgrade(&chandef);
362 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
363 chandef.width > NL80211_CHAN_WIDTH_20)
364 flags |= ieee80211_chandef_downgrade(&chandef);
365
366 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
367 return 0;
368
369 sdata_info(sdata,
370 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
371 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
372 chandef.center_freq1, chandef.center_freq2);
373
374 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
375 IEEE80211_STA_DISABLE_VHT |
376 IEEE80211_STA_DISABLE_40MHZ |
377 IEEE80211_STA_DISABLE_80P80MHZ |
378 IEEE80211_STA_DISABLE_160MHZ)) ||
379 !cfg80211_chandef_valid(&chandef)) {
380 sdata_info(sdata,
381 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
382 ifmgd->bssid);
383 return -EINVAL;
384 }
385
386 switch (chandef.width) {
387 case NL80211_CHAN_WIDTH_20_NOHT:
388 case NL80211_CHAN_WIDTH_20:
389 new_sta_bw = IEEE80211_STA_RX_BW_20;
390 break;
391 case NL80211_CHAN_WIDTH_40:
392 new_sta_bw = IEEE80211_STA_RX_BW_40;
393 break;
394 case NL80211_CHAN_WIDTH_80:
395 new_sta_bw = IEEE80211_STA_RX_BW_80;
396 break;
397 case NL80211_CHAN_WIDTH_80P80:
398 case NL80211_CHAN_WIDTH_160:
399 new_sta_bw = IEEE80211_STA_RX_BW_160;
400 break;
401 default:
402 return -EINVAL;
403 }
404
405 if (new_sta_bw > sta->cur_max_bandwidth)
406 new_sta_bw = sta->cur_max_bandwidth;
407
408 if (new_sta_bw < sta->sta.bandwidth) {
409 sta->sta.bandwidth = new_sta_bw;
410 rate_control_rate_update(local, sband, sta,
411 IEEE80211_RC_BW_CHANGED);
412 }
413
414 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
415 if (ret) {
416 sdata_info(sdata,
417 "AP %pM changed bandwidth to incompatible one - disconnect\n",
418 ifmgd->bssid);
419 return ret;
420 }
421
422 if (new_sta_bw > sta->sta.bandwidth) {
423 sta->sta.bandwidth = new_sta_bw;
424 rate_control_rate_update(local, sband, sta,
425 IEEE80211_RC_BW_CHANGED);
426 }
427
428 return 0;
429 }
430
431 /* frame sending functions */
432
433 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
434 struct sk_buff *skb, u8 ap_ht_param,
435 struct ieee80211_supported_band *sband,
436 struct ieee80211_channel *channel,
437 enum ieee80211_smps_mode smps)
438 {
439 u8 *pos;
440 u32 flags = channel->flags;
441 u16 cap;
442 struct ieee80211_sta_ht_cap ht_cap;
443
444 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
445
446 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
447 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
448
449 /* determine capability flags */
450 cap = ht_cap.cap;
451
452 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
453 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
454 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
455 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
456 cap &= ~IEEE80211_HT_CAP_SGI_40;
457 }
458 break;
459 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
460 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
461 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
462 cap &= ~IEEE80211_HT_CAP_SGI_40;
463 }
464 break;
465 }
466
467 /*
468 * If 40 MHz was disabled associate as though we weren't
469 * capable of 40 MHz -- some broken APs will never fall
470 * back to trying to transmit in 20 MHz.
471 */
472 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
473 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
474 cap &= ~IEEE80211_HT_CAP_SGI_40;
475 }
476
477 /* set SM PS mode properly */
478 cap &= ~IEEE80211_HT_CAP_SM_PS;
479 switch (smps) {
480 case IEEE80211_SMPS_AUTOMATIC:
481 case IEEE80211_SMPS_NUM_MODES:
482 WARN_ON(1);
483 case IEEE80211_SMPS_OFF:
484 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
485 IEEE80211_HT_CAP_SM_PS_SHIFT;
486 break;
487 case IEEE80211_SMPS_STATIC:
488 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
489 IEEE80211_HT_CAP_SM_PS_SHIFT;
490 break;
491 case IEEE80211_SMPS_DYNAMIC:
492 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
493 IEEE80211_HT_CAP_SM_PS_SHIFT;
494 break;
495 }
496
497 /* reserve and fill IE */
498 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
499 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
500 }
501
502 /* This function determines vht capability flags for the association
503 * and builds the IE.
504 * Note - the function may set the owner of the MU-MIMO capability
505 */
506 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
507 struct sk_buff *skb,
508 struct ieee80211_supported_band *sband,
509 struct ieee80211_vht_cap *ap_vht_cap)
510 {
511 struct ieee80211_local *local = sdata->local;
512 u8 *pos;
513 u32 cap;
514 struct ieee80211_sta_vht_cap vht_cap;
515 u32 mask, ap_bf_sts, our_bf_sts;
516
517 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
518
519 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
520 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
521
522 /* determine capability flags */
523 cap = vht_cap.cap;
524
525 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
526 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
527
528 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
529 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
530 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
531 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
532 }
533
534 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
535 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
536 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
537 }
538
539 /*
540 * Some APs apparently get confused if our capabilities are better
541 * than theirs, so restrict what we advertise in the assoc request.
542 */
543 if (!(ap_vht_cap->vht_cap_info &
544 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
545 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
546 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
547 else if (!(ap_vht_cap->vht_cap_info &
548 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
549 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
550
551 /*
552 * If some other vif is using the MU-MIMO capablity we cannot associate
553 * using MU-MIMO - this will lead to contradictions in the group-id
554 * mechanism.
555 * Ownership is defined since association request, in order to avoid
556 * simultaneous associations with MU-MIMO.
557 */
558 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
559 bool disable_mu_mimo = false;
560 struct ieee80211_sub_if_data *other;
561
562 list_for_each_entry_rcu(other, &local->interfaces, list) {
563 if (other->vif.mu_mimo_owner) {
564 disable_mu_mimo = true;
565 break;
566 }
567 }
568 if (disable_mu_mimo)
569 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
570 else
571 sdata->vif.mu_mimo_owner = true;
572 }
573
574 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
575
576 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
577 our_bf_sts = cap & mask;
578
579 if (ap_bf_sts < our_bf_sts) {
580 cap &= ~mask;
581 cap |= ap_bf_sts;
582 }
583
584 /* reserve and fill IE */
585 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
586 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
587 }
588
589 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
590 {
591 struct ieee80211_local *local = sdata->local;
592 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
593 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
594 struct sk_buff *skb;
595 struct ieee80211_mgmt *mgmt;
596 u8 *pos, qos_info;
597 size_t offset = 0, noffset;
598 int i, count, rates_len, supp_rates_len, shift;
599 u16 capab;
600 struct ieee80211_supported_band *sband;
601 struct ieee80211_chanctx_conf *chanctx_conf;
602 struct ieee80211_channel *chan;
603 u32 rate_flags, rates = 0;
604
605 sdata_assert_lock(sdata);
606
607 rcu_read_lock();
608 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
609 if (WARN_ON(!chanctx_conf)) {
610 rcu_read_unlock();
611 return;
612 }
613 chan = chanctx_conf->def.chan;
614 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
615 rcu_read_unlock();
616 sband = local->hw.wiphy->bands[chan->band];
617 shift = ieee80211_vif_get_shift(&sdata->vif);
618
619 if (assoc_data->supp_rates_len) {
620 /*
621 * Get all rates supported by the device and the AP as
622 * some APs don't like getting a superset of their rates
623 * in the association request (e.g. D-Link DAP 1353 in
624 * b-only mode)...
625 */
626 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
627 assoc_data->supp_rates,
628 assoc_data->supp_rates_len,
629 &rates);
630 } else {
631 /*
632 * In case AP not provide any supported rates information
633 * before association, we send information element(s) with
634 * all rates that we support.
635 */
636 rates_len = 0;
637 for (i = 0; i < sband->n_bitrates; i++) {
638 if ((rate_flags & sband->bitrates[i].flags)
639 != rate_flags)
640 continue;
641 rates |= BIT(i);
642 rates_len++;
643 }
644 }
645
646 skb = alloc_skb(local->hw.extra_tx_headroom +
647 sizeof(*mgmt) + /* bit too much but doesn't matter */
648 2 + assoc_data->ssid_len + /* SSID */
649 4 + rates_len + /* (extended) rates */
650 4 + /* power capability */
651 2 + 2 * sband->n_channels + /* supported channels */
652 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
653 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
654 assoc_data->ie_len + /* extra IEs */
655 9, /* WMM */
656 GFP_KERNEL);
657 if (!skb)
658 return;
659
660 skb_reserve(skb, local->hw.extra_tx_headroom);
661
662 capab = WLAN_CAPABILITY_ESS;
663
664 if (sband->band == NL80211_BAND_2GHZ) {
665 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
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 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
674 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
675
676 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
677 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
678
679 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
680 memset(mgmt, 0, 24);
681 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
682 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
683 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
684
685 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
686 skb_put(skb, 10);
687 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
688 IEEE80211_STYPE_REASSOC_REQ);
689 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
690 mgmt->u.reassoc_req.listen_interval =
691 cpu_to_le16(local->hw.conf.listen_interval);
692 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
693 ETH_ALEN);
694 } else {
695 skb_put(skb, 4);
696 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
697 IEEE80211_STYPE_ASSOC_REQ);
698 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
699 mgmt->u.assoc_req.listen_interval =
700 cpu_to_le16(local->hw.conf.listen_interval);
701 }
702
703 /* SSID */
704 pos = skb_put(skb, 2 + assoc_data->ssid_len);
705 *pos++ = WLAN_EID_SSID;
706 *pos++ = assoc_data->ssid_len;
707 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
708
709 /* add all rates which were marked to be used above */
710 supp_rates_len = rates_len;
711 if (supp_rates_len > 8)
712 supp_rates_len = 8;
713
714 pos = skb_put(skb, supp_rates_len + 2);
715 *pos++ = WLAN_EID_SUPP_RATES;
716 *pos++ = supp_rates_len;
717
718 count = 0;
719 for (i = 0; i < sband->n_bitrates; i++) {
720 if (BIT(i) & rates) {
721 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
722 5 * (1 << shift));
723 *pos++ = (u8) rate;
724 if (++count == 8)
725 break;
726 }
727 }
728
729 if (rates_len > count) {
730 pos = skb_put(skb, rates_len - count + 2);
731 *pos++ = WLAN_EID_EXT_SUPP_RATES;
732 *pos++ = rates_len - count;
733
734 for (i++; i < sband->n_bitrates; i++) {
735 if (BIT(i) & rates) {
736 int rate;
737 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
738 5 * (1 << shift));
739 *pos++ = (u8) rate;
740 }
741 }
742 }
743
744 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
745 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
746 pos = skb_put(skb, 4);
747 *pos++ = WLAN_EID_PWR_CAPABILITY;
748 *pos++ = 2;
749 *pos++ = 0; /* min tx power */
750 /* max tx power */
751 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
752 }
753
754 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
755 /* TODO: get this in reg domain format */
756 pos = skb_put(skb, 2 * sband->n_channels + 2);
757 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
758 *pos++ = 2 * sband->n_channels;
759 for (i = 0; i < sband->n_channels; i++) {
760 *pos++ = ieee80211_frequency_to_channel(
761 sband->channels[i].center_freq);
762 *pos++ = 1; /* one channel in the subband*/
763 }
764 }
765
766 /* if present, add any custom IEs that go before HT */
767 if (assoc_data->ie_len) {
768 static const u8 before_ht[] = {
769 WLAN_EID_SSID,
770 WLAN_EID_SUPP_RATES,
771 WLAN_EID_EXT_SUPP_RATES,
772 WLAN_EID_PWR_CAPABILITY,
773 WLAN_EID_SUPPORTED_CHANNELS,
774 WLAN_EID_RSN,
775 WLAN_EID_QOS_CAPA,
776 WLAN_EID_RRM_ENABLED_CAPABILITIES,
777 WLAN_EID_MOBILITY_DOMAIN,
778 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
779 WLAN_EID_RIC_DATA, /* reassoc only */
780 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
781 };
782 static const u8 after_ric[] = {
783 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
784 WLAN_EID_HT_CAPABILITY,
785 WLAN_EID_BSS_COEX_2040,
786 WLAN_EID_EXT_CAPABILITY,
787 WLAN_EID_QOS_TRAFFIC_CAPA,
788 WLAN_EID_TIM_BCAST_REQ,
789 WLAN_EID_INTERWORKING,
790 /* 60GHz doesn't happen right now */
791 WLAN_EID_VHT_CAPABILITY,
792 WLAN_EID_OPMODE_NOTIF,
793 };
794
795 noffset = ieee80211_ie_split_ric(assoc_data->ie,
796 assoc_data->ie_len,
797 before_ht,
798 ARRAY_SIZE(before_ht),
799 after_ric,
800 ARRAY_SIZE(after_ric),
801 offset);
802 pos = skb_put(skb, noffset - offset);
803 memcpy(pos, assoc_data->ie + offset, noffset - offset);
804 offset = noffset;
805 }
806
807 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
808 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
809 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
810
811 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
812 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
813 sband, chan, sdata->smps_mode);
814
815 /* if present, add any custom IEs that go before VHT */
816 if (assoc_data->ie_len) {
817 static const u8 before_vht[] = {
818 WLAN_EID_SSID,
819 WLAN_EID_SUPP_RATES,
820 WLAN_EID_EXT_SUPP_RATES,
821 WLAN_EID_PWR_CAPABILITY,
822 WLAN_EID_SUPPORTED_CHANNELS,
823 WLAN_EID_RSN,
824 WLAN_EID_QOS_CAPA,
825 WLAN_EID_RRM_ENABLED_CAPABILITIES,
826 WLAN_EID_MOBILITY_DOMAIN,
827 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
828 WLAN_EID_HT_CAPABILITY,
829 WLAN_EID_BSS_COEX_2040,
830 WLAN_EID_EXT_CAPABILITY,
831 WLAN_EID_QOS_TRAFFIC_CAPA,
832 WLAN_EID_TIM_BCAST_REQ,
833 WLAN_EID_INTERWORKING,
834 };
835
836 /* RIC already taken above, so no need to handle here anymore */
837 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
838 before_vht, ARRAY_SIZE(before_vht),
839 offset);
840 pos = skb_put(skb, noffset - offset);
841 memcpy(pos, assoc_data->ie + offset, noffset - offset);
842 offset = noffset;
843 }
844
845 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
846 ieee80211_add_vht_ie(sdata, skb, sband,
847 &assoc_data->ap_vht_cap);
848
849 /* if present, add any custom non-vendor IEs that go after HT */
850 if (assoc_data->ie_len) {
851 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
852 assoc_data->ie_len,
853 offset);
854 pos = skb_put(skb, noffset - offset);
855 memcpy(pos, assoc_data->ie + offset, noffset - offset);
856 offset = noffset;
857 }
858
859 if (assoc_data->wmm) {
860 if (assoc_data->uapsd) {
861 qos_info = ifmgd->uapsd_queues;
862 qos_info |= (ifmgd->uapsd_max_sp_len <<
863 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
864 } else {
865 qos_info = 0;
866 }
867
868 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
869 }
870
871 /* add any remaining custom (i.e. vendor specific here) IEs */
872 if (assoc_data->ie_len) {
873 noffset = assoc_data->ie_len;
874 pos = skb_put(skb, noffset - offset);
875 memcpy(pos, assoc_data->ie + offset, noffset - offset);
876 }
877
878 drv_mgd_prepare_tx(local, sdata);
879
880 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
881 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
882 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
883 IEEE80211_TX_INTFL_MLME_CONN_TX;
884 ieee80211_tx_skb(sdata, skb);
885 }
886
887 void ieee80211_send_pspoll(struct ieee80211_local *local,
888 struct ieee80211_sub_if_data *sdata)
889 {
890 struct ieee80211_pspoll *pspoll;
891 struct sk_buff *skb;
892
893 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
894 if (!skb)
895 return;
896
897 pspoll = (struct ieee80211_pspoll *) skb->data;
898 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
899
900 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
901 ieee80211_tx_skb(sdata, skb);
902 }
903
904 void ieee80211_send_nullfunc(struct ieee80211_local *local,
905 struct ieee80211_sub_if_data *sdata,
906 bool powersave)
907 {
908 struct sk_buff *skb;
909 struct ieee80211_hdr_3addr *nullfunc;
910 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
911
912 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
913 if (!skb)
914 return;
915
916 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
917 if (powersave)
918 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
919
920 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
921 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
922
923 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
924 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
925
926 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
927 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
928
929 ieee80211_tx_skb(sdata, skb);
930 }
931
932 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
933 struct ieee80211_sub_if_data *sdata)
934 {
935 struct sk_buff *skb;
936 struct ieee80211_hdr *nullfunc;
937 __le16 fc;
938
939 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
940 return;
941
942 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
943 if (!skb)
944 return;
945
946 skb_reserve(skb, local->hw.extra_tx_headroom);
947
948 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
949 memset(nullfunc, 0, 30);
950 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
951 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
952 nullfunc->frame_control = fc;
953 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
954 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
955 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
956 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
957
958 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
959 ieee80211_tx_skb(sdata, skb);
960 }
961
962 /* spectrum management related things */
963 static void ieee80211_chswitch_work(struct work_struct *work)
964 {
965 struct ieee80211_sub_if_data *sdata =
966 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
967 struct ieee80211_local *local = sdata->local;
968 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
969 int ret;
970
971 if (!ieee80211_sdata_running(sdata))
972 return;
973
974 sdata_lock(sdata);
975 mutex_lock(&local->mtx);
976 mutex_lock(&local->chanctx_mtx);
977
978 if (!ifmgd->associated)
979 goto out;
980
981 if (!sdata->vif.csa_active)
982 goto out;
983
984 /*
985 * using reservation isn't immediate as it may be deferred until later
986 * with multi-vif. once reservation is complete it will re-schedule the
987 * work with no reserved_chanctx so verify chandef to check if it
988 * completed successfully
989 */
990
991 if (sdata->reserved_chanctx) {
992 /*
993 * with multi-vif csa driver may call ieee80211_csa_finish()
994 * many times while waiting for other interfaces to use their
995 * reservations
996 */
997 if (sdata->reserved_ready)
998 goto out;
999
1000 ret = ieee80211_vif_use_reserved_context(sdata);
1001 if (ret) {
1002 sdata_info(sdata,
1003 "failed to use reserved channel context, disconnecting (err=%d)\n",
1004 ret);
1005 ieee80211_queue_work(&sdata->local->hw,
1006 &ifmgd->csa_connection_drop_work);
1007 goto out;
1008 }
1009
1010 goto out;
1011 }
1012
1013 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1014 &sdata->csa_chandef)) {
1015 sdata_info(sdata,
1016 "failed to finalize channel switch, disconnecting\n");
1017 ieee80211_queue_work(&sdata->local->hw,
1018 &ifmgd->csa_connection_drop_work);
1019 goto out;
1020 }
1021
1022 /* XXX: shouldn't really modify cfg80211-owned data! */
1023 ifmgd->associated->channel = sdata->csa_chandef.chan;
1024
1025 ifmgd->csa_waiting_bcn = true;
1026
1027 ieee80211_sta_reset_beacon_monitor(sdata);
1028 ieee80211_sta_reset_conn_monitor(sdata);
1029
1030 out:
1031 mutex_unlock(&local->chanctx_mtx);
1032 mutex_unlock(&local->mtx);
1033 sdata_unlock(sdata);
1034 }
1035
1036 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1037 {
1038 struct ieee80211_local *local = sdata->local;
1039 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1040 int ret;
1041
1042 sdata_assert_lock(sdata);
1043
1044 WARN_ON(!sdata->vif.csa_active);
1045
1046 if (sdata->csa_block_tx) {
1047 ieee80211_wake_vif_queues(local, sdata,
1048 IEEE80211_QUEUE_STOP_REASON_CSA);
1049 sdata->csa_block_tx = false;
1050 }
1051
1052 sdata->vif.csa_active = false;
1053 ifmgd->csa_waiting_bcn = false;
1054
1055 ret = drv_post_channel_switch(sdata);
1056 if (ret) {
1057 sdata_info(sdata,
1058 "driver post channel switch failed, disconnecting\n");
1059 ieee80211_queue_work(&local->hw,
1060 &ifmgd->csa_connection_drop_work);
1061 return;
1062 }
1063
1064 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1065 }
1066
1067 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1068 {
1069 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1070 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1071
1072 trace_api_chswitch_done(sdata, success);
1073 if (!success) {
1074 sdata_info(sdata,
1075 "driver channel switch failed, disconnecting\n");
1076 ieee80211_queue_work(&sdata->local->hw,
1077 &ifmgd->csa_connection_drop_work);
1078 } else {
1079 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1080 }
1081 }
1082 EXPORT_SYMBOL(ieee80211_chswitch_done);
1083
1084 static void ieee80211_chswitch_timer(unsigned long data)
1085 {
1086 struct ieee80211_sub_if_data *sdata =
1087 (struct ieee80211_sub_if_data *) data;
1088
1089 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1090 }
1091
1092 static void
1093 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1094 u64 timestamp, u32 device_timestamp,
1095 struct ieee802_11_elems *elems,
1096 bool beacon)
1097 {
1098 struct ieee80211_local *local = sdata->local;
1099 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1100 struct cfg80211_bss *cbss = ifmgd->associated;
1101 struct ieee80211_chanctx_conf *conf;
1102 struct ieee80211_chanctx *chanctx;
1103 enum nl80211_band current_band;
1104 struct ieee80211_csa_ie csa_ie;
1105 struct ieee80211_channel_switch ch_switch;
1106 int res;
1107
1108 sdata_assert_lock(sdata);
1109
1110 if (!cbss)
1111 return;
1112
1113 if (local->scanning)
1114 return;
1115
1116 /* disregard subsequent announcements if we are already processing */
1117 if (sdata->vif.csa_active)
1118 return;
1119
1120 current_band = cbss->channel->band;
1121 memset(&csa_ie, 0, sizeof(csa_ie));
1122 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1123 ifmgd->flags,
1124 ifmgd->associated->bssid, &csa_ie);
1125 if (res < 0)
1126 ieee80211_queue_work(&local->hw,
1127 &ifmgd->csa_connection_drop_work);
1128 if (res)
1129 return;
1130
1131 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1132 IEEE80211_CHAN_DISABLED)) {
1133 sdata_info(sdata,
1134 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1135 ifmgd->associated->bssid,
1136 csa_ie.chandef.chan->center_freq,
1137 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1138 csa_ie.chandef.center_freq2);
1139 ieee80211_queue_work(&local->hw,
1140 &ifmgd->csa_connection_drop_work);
1141 return;
1142 }
1143
1144 if (cfg80211_chandef_identical(&csa_ie.chandef,
1145 &sdata->vif.bss_conf.chandef)) {
1146 if (ifmgd->csa_ignored_same_chan)
1147 return;
1148 sdata_info(sdata,
1149 "AP %pM tries to chanswitch to same channel, ignore\n",
1150 ifmgd->associated->bssid);
1151 ifmgd->csa_ignored_same_chan = true;
1152 return;
1153 }
1154
1155 /*
1156 * Drop all TDLS peers - either we disconnect or move to a different
1157 * channel from this point on. There's no telling what our peer will do.
1158 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1159 * have an incompatible wider chandef.
1160 */
1161 ieee80211_teardown_tdls_peers(sdata);
1162
1163 mutex_lock(&local->mtx);
1164 mutex_lock(&local->chanctx_mtx);
1165 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1166 lockdep_is_held(&local->chanctx_mtx));
1167 if (!conf) {
1168 sdata_info(sdata,
1169 "no channel context assigned to vif?, disconnecting\n");
1170 goto drop_connection;
1171 }
1172
1173 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1174
1175 if (local->use_chanctx &&
1176 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1177 sdata_info(sdata,
1178 "driver doesn't support chan-switch with channel contexts\n");
1179 goto drop_connection;
1180 }
1181
1182 ch_switch.timestamp = timestamp;
1183 ch_switch.device_timestamp = device_timestamp;
1184 ch_switch.block_tx = csa_ie.mode;
1185 ch_switch.chandef = csa_ie.chandef;
1186 ch_switch.count = csa_ie.count;
1187
1188 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1189 sdata_info(sdata,
1190 "preparing for channel switch failed, disconnecting\n");
1191 goto drop_connection;
1192 }
1193
1194 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1195 chanctx->mode, false);
1196 if (res) {
1197 sdata_info(sdata,
1198 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1199 res);
1200 goto drop_connection;
1201 }
1202 mutex_unlock(&local->chanctx_mtx);
1203
1204 sdata->vif.csa_active = true;
1205 sdata->csa_chandef = csa_ie.chandef;
1206 sdata->csa_block_tx = csa_ie.mode;
1207 ifmgd->csa_ignored_same_chan = false;
1208
1209 if (sdata->csa_block_tx)
1210 ieee80211_stop_vif_queues(local, sdata,
1211 IEEE80211_QUEUE_STOP_REASON_CSA);
1212 mutex_unlock(&local->mtx);
1213
1214 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1215 csa_ie.count);
1216
1217 if (local->ops->channel_switch) {
1218 /* use driver's channel switch callback */
1219 drv_channel_switch(local, sdata, &ch_switch);
1220 return;
1221 }
1222
1223 /* channel switch handled in software */
1224 if (csa_ie.count <= 1)
1225 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1226 else
1227 mod_timer(&ifmgd->chswitch_timer,
1228 TU_TO_EXP_TIME((csa_ie.count - 1) *
1229 cbss->beacon_interval));
1230 return;
1231 drop_connection:
1232 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1233 mutex_unlock(&local->chanctx_mtx);
1234 mutex_unlock(&local->mtx);
1235 }
1236
1237 static bool
1238 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1239 struct ieee80211_channel *channel,
1240 const u8 *country_ie, u8 country_ie_len,
1241 const u8 *pwr_constr_elem,
1242 int *chan_pwr, int *pwr_reduction)
1243 {
1244 struct ieee80211_country_ie_triplet *triplet;
1245 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1246 int i, chan_increment;
1247 bool have_chan_pwr = false;
1248
1249 /* Invalid IE */
1250 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1251 return false;
1252
1253 triplet = (void *)(country_ie + 3);
1254 country_ie_len -= 3;
1255
1256 switch (channel->band) {
1257 default:
1258 WARN_ON_ONCE(1);
1259 /* fall through */
1260 case NL80211_BAND_2GHZ:
1261 case NL80211_BAND_60GHZ:
1262 chan_increment = 1;
1263 break;
1264 case NL80211_BAND_5GHZ:
1265 chan_increment = 4;
1266 break;
1267 }
1268
1269 /* find channel */
1270 while (country_ie_len >= 3) {
1271 u8 first_channel = triplet->chans.first_channel;
1272
1273 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1274 goto next;
1275
1276 for (i = 0; i < triplet->chans.num_channels; i++) {
1277 if (first_channel + i * chan_increment == chan) {
1278 have_chan_pwr = true;
1279 *chan_pwr = triplet->chans.max_power;
1280 break;
1281 }
1282 }
1283 if (have_chan_pwr)
1284 break;
1285
1286 next:
1287 triplet++;
1288 country_ie_len -= 3;
1289 }
1290
1291 if (have_chan_pwr && pwr_constr_elem)
1292 *pwr_reduction = *pwr_constr_elem;
1293 else
1294 *pwr_reduction = 0;
1295
1296 return have_chan_pwr;
1297 }
1298
1299 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1300 struct ieee80211_channel *channel,
1301 const u8 *cisco_dtpc_ie,
1302 int *pwr_level)
1303 {
1304 /* From practical testing, the first data byte of the DTPC element
1305 * seems to contain the requested dBm level, and the CLI on Cisco
1306 * APs clearly state the range is -127 to 127 dBm, which indicates
1307 * a signed byte, although it seemingly never actually goes negative.
1308 * The other byte seems to always be zero.
1309 */
1310 *pwr_level = (__s8)cisco_dtpc_ie[4];
1311 }
1312
1313 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1314 struct ieee80211_channel *channel,
1315 struct ieee80211_mgmt *mgmt,
1316 const u8 *country_ie, u8 country_ie_len,
1317 const u8 *pwr_constr_ie,
1318 const u8 *cisco_dtpc_ie)
1319 {
1320 bool has_80211h_pwr = false, has_cisco_pwr = false;
1321 int chan_pwr = 0, pwr_reduction_80211h = 0;
1322 int pwr_level_cisco, pwr_level_80211h;
1323 int new_ap_level;
1324 __le16 capab = mgmt->u.probe_resp.capab_info;
1325
1326 if (country_ie &&
1327 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1328 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1329 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1330 sdata, channel, country_ie, country_ie_len,
1331 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1332 pwr_level_80211h =
1333 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1334 }
1335
1336 if (cisco_dtpc_ie) {
1337 ieee80211_find_cisco_dtpc(
1338 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1339 has_cisco_pwr = true;
1340 }
1341
1342 if (!has_80211h_pwr && !has_cisco_pwr)
1343 return 0;
1344
1345 /* If we have both 802.11h and Cisco DTPC, apply both limits
1346 * by picking the smallest of the two power levels advertised.
1347 */
1348 if (has_80211h_pwr &&
1349 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1350 new_ap_level = pwr_level_80211h;
1351
1352 if (sdata->ap_power_level == new_ap_level)
1353 return 0;
1354
1355 sdata_dbg(sdata,
1356 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1357 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1358 sdata->u.mgd.bssid);
1359 } else { /* has_cisco_pwr is always true here. */
1360 new_ap_level = pwr_level_cisco;
1361
1362 if (sdata->ap_power_level == new_ap_level)
1363 return 0;
1364
1365 sdata_dbg(sdata,
1366 "Limiting TX power to %d dBm as advertised by %pM\n",
1367 pwr_level_cisco, sdata->u.mgd.bssid);
1368 }
1369
1370 sdata->ap_power_level = new_ap_level;
1371 if (__ieee80211_recalc_txpower(sdata))
1372 return BSS_CHANGED_TXPOWER;
1373 return 0;
1374 }
1375
1376 /* powersave */
1377 static void ieee80211_enable_ps(struct ieee80211_local *local,
1378 struct ieee80211_sub_if_data *sdata)
1379 {
1380 struct ieee80211_conf *conf = &local->hw.conf;
1381
1382 /*
1383 * If we are scanning right now then the parameters will
1384 * take effect when scan finishes.
1385 */
1386 if (local->scanning)
1387 return;
1388
1389 if (conf->dynamic_ps_timeout > 0 &&
1390 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1391 mod_timer(&local->dynamic_ps_timer, jiffies +
1392 msecs_to_jiffies(conf->dynamic_ps_timeout));
1393 } else {
1394 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1395 ieee80211_send_nullfunc(local, sdata, true);
1396
1397 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1398 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1399 return;
1400
1401 conf->flags |= IEEE80211_CONF_PS;
1402 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1403 }
1404 }
1405
1406 static void ieee80211_change_ps(struct ieee80211_local *local)
1407 {
1408 struct ieee80211_conf *conf = &local->hw.conf;
1409
1410 if (local->ps_sdata) {
1411 ieee80211_enable_ps(local, local->ps_sdata);
1412 } else if (conf->flags & IEEE80211_CONF_PS) {
1413 conf->flags &= ~IEEE80211_CONF_PS;
1414 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1415 del_timer_sync(&local->dynamic_ps_timer);
1416 cancel_work_sync(&local->dynamic_ps_enable_work);
1417 }
1418 }
1419
1420 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1421 {
1422 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1423 struct sta_info *sta = NULL;
1424 bool authorized = false;
1425
1426 if (!mgd->powersave)
1427 return false;
1428
1429 if (mgd->broken_ap)
1430 return false;
1431
1432 if (!mgd->associated)
1433 return false;
1434
1435 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1436 return false;
1437
1438 if (!mgd->have_beacon)
1439 return false;
1440
1441 rcu_read_lock();
1442 sta = sta_info_get(sdata, mgd->bssid);
1443 if (sta)
1444 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1445 rcu_read_unlock();
1446
1447 return authorized;
1448 }
1449
1450 /* need to hold RTNL or interface lock */
1451 void ieee80211_recalc_ps(struct ieee80211_local *local)
1452 {
1453 struct ieee80211_sub_if_data *sdata, *found = NULL;
1454 int count = 0;
1455 int timeout;
1456
1457 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1458 local->ps_sdata = NULL;
1459 return;
1460 }
1461
1462 list_for_each_entry(sdata, &local->interfaces, list) {
1463 if (!ieee80211_sdata_running(sdata))
1464 continue;
1465 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1466 /* If an AP vif is found, then disable PS
1467 * by setting the count to zero thereby setting
1468 * ps_sdata to NULL.
1469 */
1470 count = 0;
1471 break;
1472 }
1473 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1474 continue;
1475 found = sdata;
1476 count++;
1477 }
1478
1479 if (count == 1 && ieee80211_powersave_allowed(found)) {
1480 u8 dtimper = found->u.mgd.dtim_period;
1481 s32 beaconint_us;
1482
1483 beaconint_us = ieee80211_tu_to_usec(
1484 found->vif.bss_conf.beacon_int);
1485
1486 timeout = local->dynamic_ps_forced_timeout;
1487 if (timeout < 0)
1488 timeout = 100;
1489 local->hw.conf.dynamic_ps_timeout = timeout;
1490
1491 /* If the TIM IE is invalid, pretend the value is 1 */
1492 if (!dtimper)
1493 dtimper = 1;
1494
1495 local->hw.conf.ps_dtim_period = dtimper;
1496 local->ps_sdata = found;
1497 } else {
1498 local->ps_sdata = NULL;
1499 }
1500
1501 ieee80211_change_ps(local);
1502 }
1503
1504 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1505 {
1506 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1507
1508 if (sdata->vif.bss_conf.ps != ps_allowed) {
1509 sdata->vif.bss_conf.ps = ps_allowed;
1510 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1511 }
1512 }
1513
1514 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1515 {
1516 struct ieee80211_local *local =
1517 container_of(work, struct ieee80211_local,
1518 dynamic_ps_disable_work);
1519
1520 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1521 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1522 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1523 }
1524
1525 ieee80211_wake_queues_by_reason(&local->hw,
1526 IEEE80211_MAX_QUEUE_MAP,
1527 IEEE80211_QUEUE_STOP_REASON_PS,
1528 false);
1529 }
1530
1531 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1532 {
1533 struct ieee80211_local *local =
1534 container_of(work, struct ieee80211_local,
1535 dynamic_ps_enable_work);
1536 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1537 struct ieee80211_if_managed *ifmgd;
1538 unsigned long flags;
1539 int q;
1540
1541 /* can only happen when PS was just disabled anyway */
1542 if (!sdata)
1543 return;
1544
1545 ifmgd = &sdata->u.mgd;
1546
1547 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1548 return;
1549
1550 if (local->hw.conf.dynamic_ps_timeout > 0) {
1551 /* don't enter PS if TX frames are pending */
1552 if (drv_tx_frames_pending(local)) {
1553 mod_timer(&local->dynamic_ps_timer, jiffies +
1554 msecs_to_jiffies(
1555 local->hw.conf.dynamic_ps_timeout));
1556 return;
1557 }
1558
1559 /*
1560 * transmission can be stopped by others which leads to
1561 * dynamic_ps_timer expiry. Postpone the ps timer if it
1562 * is not the actual idle state.
1563 */
1564 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1565 for (q = 0; q < local->hw.queues; q++) {
1566 if (local->queue_stop_reasons[q]) {
1567 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1568 flags);
1569 mod_timer(&local->dynamic_ps_timer, jiffies +
1570 msecs_to_jiffies(
1571 local->hw.conf.dynamic_ps_timeout));
1572 return;
1573 }
1574 }
1575 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1576 }
1577
1578 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1579 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1580 if (drv_tx_frames_pending(local)) {
1581 mod_timer(&local->dynamic_ps_timer, jiffies +
1582 msecs_to_jiffies(
1583 local->hw.conf.dynamic_ps_timeout));
1584 } else {
1585 ieee80211_send_nullfunc(local, sdata, true);
1586 /* Flush to get the tx status of nullfunc frame */
1587 ieee80211_flush_queues(local, sdata, false);
1588 }
1589 }
1590
1591 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1592 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1593 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1594 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1595 local->hw.conf.flags |= IEEE80211_CONF_PS;
1596 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1597 }
1598 }
1599
1600 void ieee80211_dynamic_ps_timer(unsigned long data)
1601 {
1602 struct ieee80211_local *local = (void *) data;
1603
1604 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1605 }
1606
1607 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1608 {
1609 struct delayed_work *delayed_work = to_delayed_work(work);
1610 struct ieee80211_sub_if_data *sdata =
1611 container_of(delayed_work, struct ieee80211_sub_if_data,
1612 dfs_cac_timer_work);
1613 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1614
1615 mutex_lock(&sdata->local->mtx);
1616 if (sdata->wdev.cac_started) {
1617 ieee80211_vif_release_channel(sdata);
1618 cfg80211_cac_event(sdata->dev, &chandef,
1619 NL80211_RADAR_CAC_FINISHED,
1620 GFP_KERNEL);
1621 }
1622 mutex_unlock(&sdata->local->mtx);
1623 }
1624
1625 static bool
1626 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1627 {
1628 struct ieee80211_local *local = sdata->local;
1629 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1630 bool ret = false;
1631 int ac;
1632
1633 if (local->hw.queues < IEEE80211_NUM_ACS)
1634 return false;
1635
1636 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1637 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1638 int non_acm_ac;
1639 unsigned long now = jiffies;
1640
1641 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1642 tx_tspec->admitted_time &&
1643 time_after(now, tx_tspec->time_slice_start + HZ)) {
1644 tx_tspec->consumed_tx_time = 0;
1645 tx_tspec->time_slice_start = now;
1646
1647 if (tx_tspec->downgraded)
1648 tx_tspec->action =
1649 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1650 }
1651
1652 switch (tx_tspec->action) {
1653 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1654 /* take the original parameters */
1655 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1656 sdata_err(sdata,
1657 "failed to set TX queue parameters for queue %d\n",
1658 ac);
1659 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1660 tx_tspec->downgraded = false;
1661 ret = true;
1662 break;
1663 case TX_TSPEC_ACTION_DOWNGRADE:
1664 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1665 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1666 ret = true;
1667 break;
1668 }
1669 /* downgrade next lower non-ACM AC */
1670 for (non_acm_ac = ac + 1;
1671 non_acm_ac < IEEE80211_NUM_ACS;
1672 non_acm_ac++)
1673 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1674 break;
1675 /* Usually the loop will result in using BK even if it
1676 * requires admission control, but such a configuration
1677 * makes no sense and we have to transmit somehow - the
1678 * AC selection does the same thing.
1679 * If we started out trying to downgrade from BK, then
1680 * the extra condition here might be needed.
1681 */
1682 if (non_acm_ac >= IEEE80211_NUM_ACS)
1683 non_acm_ac = IEEE80211_AC_BK;
1684 if (drv_conf_tx(local, sdata, ac,
1685 &sdata->tx_conf[non_acm_ac]))
1686 sdata_err(sdata,
1687 "failed to set TX queue parameters for queue %d\n",
1688 ac);
1689 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1690 ret = true;
1691 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1692 tx_tspec->time_slice_start + HZ - now + 1);
1693 break;
1694 case TX_TSPEC_ACTION_NONE:
1695 /* nothing now */
1696 break;
1697 }
1698 }
1699
1700 return ret;
1701 }
1702
1703 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1704 {
1705 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1706 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1707 }
1708
1709 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1710 {
1711 struct ieee80211_sub_if_data *sdata;
1712
1713 sdata = container_of(work, struct ieee80211_sub_if_data,
1714 u.mgd.tx_tspec_wk.work);
1715 ieee80211_sta_handle_tspec_ac_params(sdata);
1716 }
1717
1718 /* MLME */
1719 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1720 struct ieee80211_sub_if_data *sdata,
1721 const u8 *wmm_param, size_t wmm_param_len)
1722 {
1723 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1724 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1725 size_t left;
1726 int count, ac;
1727 const u8 *pos;
1728 u8 uapsd_queues = 0;
1729
1730 if (!local->ops->conf_tx)
1731 return false;
1732
1733 if (local->hw.queues < IEEE80211_NUM_ACS)
1734 return false;
1735
1736 if (!wmm_param)
1737 return false;
1738
1739 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1740 return false;
1741
1742 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1743 uapsd_queues = ifmgd->uapsd_queues;
1744
1745 count = wmm_param[6] & 0x0f;
1746 if (count == ifmgd->wmm_last_param_set)
1747 return false;
1748 ifmgd->wmm_last_param_set = count;
1749
1750 pos = wmm_param + 8;
1751 left = wmm_param_len - 8;
1752
1753 memset(&params, 0, sizeof(params));
1754
1755 sdata->wmm_acm = 0;
1756 for (; left >= 4; left -= 4, pos += 4) {
1757 int aci = (pos[0] >> 5) & 0x03;
1758 int acm = (pos[0] >> 4) & 0x01;
1759 bool uapsd = false;
1760
1761 switch (aci) {
1762 case 1: /* AC_BK */
1763 ac = IEEE80211_AC_BK;
1764 if (acm)
1765 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1766 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1767 uapsd = true;
1768 break;
1769 case 2: /* AC_VI */
1770 ac = IEEE80211_AC_VI;
1771 if (acm)
1772 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1773 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1774 uapsd = true;
1775 break;
1776 case 3: /* AC_VO */
1777 ac = IEEE80211_AC_VO;
1778 if (acm)
1779 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1780 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1781 uapsd = true;
1782 break;
1783 case 0: /* AC_BE */
1784 default:
1785 ac = IEEE80211_AC_BE;
1786 if (acm)
1787 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1788 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1789 uapsd = true;
1790 break;
1791 }
1792
1793 params[ac].aifs = pos[0] & 0x0f;
1794
1795 if (params[ac].aifs < 2) {
1796 sdata_info(sdata,
1797 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1798 params[ac].aifs, aci);
1799 params[ac].aifs = 2;
1800 }
1801 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1802 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1803 params[ac].txop = get_unaligned_le16(pos + 2);
1804 params[ac].acm = acm;
1805 params[ac].uapsd = uapsd;
1806
1807 if (params[ac].cw_min > params[ac].cw_max) {
1808 sdata_info(sdata,
1809 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1810 params[ac].cw_min, params[ac].cw_max, aci);
1811 return false;
1812 }
1813 }
1814
1815 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1816 mlme_dbg(sdata,
1817 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1818 ac, params[ac].acm,
1819 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1820 params[ac].txop, params[ac].uapsd,
1821 ifmgd->tx_tspec[ac].downgraded);
1822 sdata->tx_conf[ac] = params[ac];
1823 if (!ifmgd->tx_tspec[ac].downgraded &&
1824 drv_conf_tx(local, sdata, ac, &params[ac]))
1825 sdata_err(sdata,
1826 "failed to set TX queue parameters for AC %d\n",
1827 ac);
1828 }
1829
1830 /* enable WMM or activate new settings */
1831 sdata->vif.bss_conf.qos = true;
1832 return true;
1833 }
1834
1835 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1836 {
1837 lockdep_assert_held(&sdata->local->mtx);
1838
1839 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1840 ieee80211_run_deferred_scan(sdata->local);
1841 }
1842
1843 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1844 {
1845 mutex_lock(&sdata->local->mtx);
1846 __ieee80211_stop_poll(sdata);
1847 mutex_unlock(&sdata->local->mtx);
1848 }
1849
1850 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1851 u16 capab, bool erp_valid, u8 erp)
1852 {
1853 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1854 struct ieee80211_supported_band *sband;
1855 u32 changed = 0;
1856 bool use_protection;
1857 bool use_short_preamble;
1858 bool use_short_slot;
1859
1860 sband = ieee80211_get_sband(sdata);
1861 if (!sband)
1862 return changed;
1863
1864 if (erp_valid) {
1865 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1866 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1867 } else {
1868 use_protection = false;
1869 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1870 }
1871
1872 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1873 if (sband->band == NL80211_BAND_5GHZ)
1874 use_short_slot = true;
1875
1876 if (use_protection != bss_conf->use_cts_prot) {
1877 bss_conf->use_cts_prot = use_protection;
1878 changed |= BSS_CHANGED_ERP_CTS_PROT;
1879 }
1880
1881 if (use_short_preamble != bss_conf->use_short_preamble) {
1882 bss_conf->use_short_preamble = use_short_preamble;
1883 changed |= BSS_CHANGED_ERP_PREAMBLE;
1884 }
1885
1886 if (use_short_slot != bss_conf->use_short_slot) {
1887 bss_conf->use_short_slot = use_short_slot;
1888 changed |= BSS_CHANGED_ERP_SLOT;
1889 }
1890
1891 return changed;
1892 }
1893
1894 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1895 struct cfg80211_bss *cbss,
1896 u32 bss_info_changed)
1897 {
1898 struct ieee80211_bss *bss = (void *)cbss->priv;
1899 struct ieee80211_local *local = sdata->local;
1900 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1901
1902 bss_info_changed |= BSS_CHANGED_ASSOC;
1903 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1904 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1905
1906 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1907 beacon_loss_count * bss_conf->beacon_int));
1908
1909 sdata->u.mgd.associated = cbss;
1910 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1911
1912 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1913
1914 if (sdata->vif.p2p ||
1915 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
1916 const struct cfg80211_bss_ies *ies;
1917
1918 rcu_read_lock();
1919 ies = rcu_dereference(cbss->ies);
1920 if (ies) {
1921 int ret;
1922
1923 ret = cfg80211_get_p2p_attr(
1924 ies->data, ies->len,
1925 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1926 (u8 *) &bss_conf->p2p_noa_attr,
1927 sizeof(bss_conf->p2p_noa_attr));
1928 if (ret >= 2) {
1929 sdata->u.mgd.p2p_noa_index =
1930 bss_conf->p2p_noa_attr.index;
1931 bss_info_changed |= BSS_CHANGED_P2P_PS;
1932 }
1933 }
1934 rcu_read_unlock();
1935 }
1936
1937 /* just to be sure */
1938 ieee80211_stop_poll(sdata);
1939
1940 ieee80211_led_assoc(local, 1);
1941
1942 if (sdata->u.mgd.have_beacon) {
1943 /*
1944 * If the AP is buggy we may get here with no DTIM period
1945 * known, so assume it's 1 which is the only safe assumption
1946 * in that case, although if the TIM IE is broken powersave
1947 * probably just won't work at all.
1948 */
1949 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1950 bss_conf->beacon_rate = bss->beacon_rate;
1951 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1952 } else {
1953 bss_conf->beacon_rate = NULL;
1954 bss_conf->dtim_period = 0;
1955 }
1956
1957 bss_conf->assoc = 1;
1958
1959 /* Tell the driver to monitor connection quality (if supported) */
1960 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1961 bss_conf->cqm_rssi_thold)
1962 bss_info_changed |= BSS_CHANGED_CQM;
1963
1964 /* Enable ARP filtering */
1965 if (bss_conf->arp_addr_cnt)
1966 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1967
1968 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1969
1970 mutex_lock(&local->iflist_mtx);
1971 ieee80211_recalc_ps(local);
1972 mutex_unlock(&local->iflist_mtx);
1973
1974 ieee80211_recalc_smps(sdata);
1975 ieee80211_recalc_ps_vif(sdata);
1976
1977 netif_carrier_on(sdata->dev);
1978 }
1979
1980 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1981 u16 stype, u16 reason, bool tx,
1982 u8 *frame_buf)
1983 {
1984 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1985 struct ieee80211_local *local = sdata->local;
1986 u32 changed = 0;
1987
1988 sdata_assert_lock(sdata);
1989
1990 if (WARN_ON_ONCE(tx && !frame_buf))
1991 return;
1992
1993 if (WARN_ON(!ifmgd->associated))
1994 return;
1995
1996 ieee80211_stop_poll(sdata);
1997
1998 ifmgd->associated = NULL;
1999 netif_carrier_off(sdata->dev);
2000
2001 /*
2002 * if we want to get out of ps before disassoc (why?) we have
2003 * to do it before sending disassoc, as otherwise the null-packet
2004 * won't be valid.
2005 */
2006 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2007 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2008 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2009 }
2010 local->ps_sdata = NULL;
2011
2012 /* disable per-vif ps */
2013 ieee80211_recalc_ps_vif(sdata);
2014
2015 /* make sure ongoing transmission finishes */
2016 synchronize_net();
2017
2018 /*
2019 * drop any frame before deauth/disassoc, this can be data or
2020 * management frame. Since we are disconnecting, we should not
2021 * insist sending these frames which can take time and delay
2022 * the disconnection and possible the roaming.
2023 */
2024 if (tx)
2025 ieee80211_flush_queues(local, sdata, true);
2026
2027 /* deauthenticate/disassociate now */
2028 if (tx || frame_buf)
2029 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2030 reason, tx, frame_buf);
2031
2032 /* flush out frame - make sure the deauth was actually sent */
2033 if (tx)
2034 ieee80211_flush_queues(local, sdata, false);
2035
2036 /* clear bssid only after building the needed mgmt frames */
2037 eth_zero_addr(ifmgd->bssid);
2038
2039 /* remove AP and TDLS peers */
2040 sta_info_flush(sdata);
2041
2042 /* finally reset all BSS / config parameters */
2043 changed |= ieee80211_reset_erp_info(sdata);
2044
2045 ieee80211_led_assoc(local, 0);
2046 changed |= BSS_CHANGED_ASSOC;
2047 sdata->vif.bss_conf.assoc = false;
2048
2049 ifmgd->p2p_noa_index = -1;
2050 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2051 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2052
2053 /* on the next assoc, re-program HT/VHT parameters */
2054 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2055 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2056 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2057 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2058
2059 /* reset MU-MIMO ownership and group data */
2060 memset(sdata->vif.bss_conf.mu_group.membership, 0,
2061 sizeof(sdata->vif.bss_conf.mu_group.membership));
2062 memset(sdata->vif.bss_conf.mu_group.position, 0,
2063 sizeof(sdata->vif.bss_conf.mu_group.position));
2064 changed |= BSS_CHANGED_MU_GROUPS;
2065 sdata->vif.mu_mimo_owner = false;
2066
2067 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2068
2069 del_timer_sync(&local->dynamic_ps_timer);
2070 cancel_work_sync(&local->dynamic_ps_enable_work);
2071
2072 /* Disable ARP filtering */
2073 if (sdata->vif.bss_conf.arp_addr_cnt)
2074 changed |= BSS_CHANGED_ARP_FILTER;
2075
2076 sdata->vif.bss_conf.qos = false;
2077 changed |= BSS_CHANGED_QOS;
2078
2079 /* The BSSID (not really interesting) and HT changed */
2080 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2081 ieee80211_bss_info_change_notify(sdata, changed);
2082
2083 /* disassociated - set to defaults now */
2084 ieee80211_set_wmm_default(sdata, false, false);
2085
2086 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2087 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2088 del_timer_sync(&sdata->u.mgd.timer);
2089 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2090
2091 sdata->vif.bss_conf.dtim_period = 0;
2092 sdata->vif.bss_conf.beacon_rate = NULL;
2093
2094 ifmgd->have_beacon = false;
2095
2096 ifmgd->flags = 0;
2097 mutex_lock(&local->mtx);
2098 ieee80211_vif_release_channel(sdata);
2099
2100 sdata->vif.csa_active = false;
2101 ifmgd->csa_waiting_bcn = false;
2102 ifmgd->csa_ignored_same_chan = false;
2103 if (sdata->csa_block_tx) {
2104 ieee80211_wake_vif_queues(local, sdata,
2105 IEEE80211_QUEUE_STOP_REASON_CSA);
2106 sdata->csa_block_tx = false;
2107 }
2108 mutex_unlock(&local->mtx);
2109
2110 /* existing TX TSPEC sessions no longer exist */
2111 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2112 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2113
2114 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2115 }
2116
2117 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2118 struct ieee80211_hdr *hdr)
2119 {
2120 /*
2121 * We can postpone the mgd.timer whenever receiving unicast frames
2122 * from AP because we know that the connection is working both ways
2123 * at that time. But multicast frames (and hence also beacons) must
2124 * be ignored here, because we need to trigger the timer during
2125 * data idle periods for sending the periodic probe request to the
2126 * AP we're connected to.
2127 */
2128 if (is_multicast_ether_addr(hdr->addr1))
2129 return;
2130
2131 ieee80211_sta_reset_conn_monitor(sdata);
2132 }
2133
2134 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2135 {
2136 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2137 struct ieee80211_local *local = sdata->local;
2138
2139 mutex_lock(&local->mtx);
2140 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2141 goto out;
2142
2143 __ieee80211_stop_poll(sdata);
2144
2145 mutex_lock(&local->iflist_mtx);
2146 ieee80211_recalc_ps(local);
2147 mutex_unlock(&local->iflist_mtx);
2148
2149 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2150 goto out;
2151
2152 /*
2153 * We've received a probe response, but are not sure whether
2154 * we have or will be receiving any beacons or data, so let's
2155 * schedule the timers again, just in case.
2156 */
2157 ieee80211_sta_reset_beacon_monitor(sdata);
2158
2159 mod_timer(&ifmgd->conn_mon_timer,
2160 round_jiffies_up(jiffies +
2161 IEEE80211_CONNECTION_IDLE_TIME));
2162 out:
2163 mutex_unlock(&local->mtx);
2164 }
2165
2166 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2167 struct ieee80211_hdr *hdr,
2168 u16 tx_time)
2169 {
2170 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2171 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2172 int ac = ieee80211_ac_from_tid(tid);
2173 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2174 unsigned long now = jiffies;
2175
2176 if (likely(!tx_tspec->admitted_time))
2177 return;
2178
2179 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2180 tx_tspec->consumed_tx_time = 0;
2181 tx_tspec->time_slice_start = now;
2182
2183 if (tx_tspec->downgraded) {
2184 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2185 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2186 }
2187 }
2188
2189 if (tx_tspec->downgraded)
2190 return;
2191
2192 tx_tspec->consumed_tx_time += tx_time;
2193
2194 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2195 tx_tspec->downgraded = true;
2196 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2197 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2198 }
2199 }
2200
2201 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2202 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2203 {
2204 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2205
2206 if (!ieee80211_is_data(hdr->frame_control))
2207 return;
2208
2209 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2210 sdata->u.mgd.probe_send_count > 0) {
2211 if (ack)
2212 ieee80211_sta_reset_conn_monitor(sdata);
2213 else
2214 sdata->u.mgd.nullfunc_failed = true;
2215 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2216 return;
2217 }
2218
2219 if (ack)
2220 ieee80211_sta_reset_conn_monitor(sdata);
2221 }
2222
2223 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2224 {
2225 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2226 const u8 *ssid;
2227 u8 *dst = ifmgd->associated->bssid;
2228 u8 unicast_limit = max(1, max_probe_tries - 3);
2229 struct sta_info *sta;
2230
2231 /*
2232 * Try sending broadcast probe requests for the last three
2233 * probe requests after the first ones failed since some
2234 * buggy APs only support broadcast probe requests.
2235 */
2236 if (ifmgd->probe_send_count >= unicast_limit)
2237 dst = NULL;
2238
2239 /*
2240 * When the hardware reports an accurate Tx ACK status, it's
2241 * better to send a nullfunc frame instead of a probe request,
2242 * as it will kick us off the AP quickly if we aren't associated
2243 * anymore. The timeout will be reset if the frame is ACKed by
2244 * the AP.
2245 */
2246 ifmgd->probe_send_count++;
2247
2248 if (dst) {
2249 mutex_lock(&sdata->local->sta_mtx);
2250 sta = sta_info_get(sdata, dst);
2251 if (!WARN_ON(!sta))
2252 ieee80211_check_fast_rx(sta);
2253 mutex_unlock(&sdata->local->sta_mtx);
2254 }
2255
2256 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2257 ifmgd->nullfunc_failed = false;
2258 ieee80211_send_nullfunc(sdata->local, sdata, false);
2259 } else {
2260 int ssid_len;
2261
2262 rcu_read_lock();
2263 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2264 if (WARN_ON_ONCE(ssid == NULL))
2265 ssid_len = 0;
2266 else
2267 ssid_len = ssid[1];
2268
2269 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2270 ssid + 2, ssid_len, NULL,
2271 0, (u32) -1, true, 0,
2272 ifmgd->associated->channel, false);
2273 rcu_read_unlock();
2274 }
2275
2276 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2277 run_again(sdata, ifmgd->probe_timeout);
2278 }
2279
2280 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2281 bool beacon)
2282 {
2283 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2284 bool already = false;
2285
2286 if (!ieee80211_sdata_running(sdata))
2287 return;
2288
2289 sdata_lock(sdata);
2290
2291 if (!ifmgd->associated)
2292 goto out;
2293
2294 mutex_lock(&sdata->local->mtx);
2295
2296 if (sdata->local->tmp_channel || sdata->local->scanning) {
2297 mutex_unlock(&sdata->local->mtx);
2298 goto out;
2299 }
2300
2301 if (beacon) {
2302 mlme_dbg_ratelimited(sdata,
2303 "detected beacon loss from AP (missed %d beacons) - probing\n",
2304 beacon_loss_count);
2305
2306 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2307 }
2308
2309 /*
2310 * The driver/our work has already reported this event or the
2311 * connection monitoring has kicked in and we have already sent
2312 * a probe request. Or maybe the AP died and the driver keeps
2313 * reporting until we disassociate...
2314 *
2315 * In either case we have to ignore the current call to this
2316 * function (except for setting the correct probe reason bit)
2317 * because otherwise we would reset the timer every time and
2318 * never check whether we received a probe response!
2319 */
2320 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2321 already = true;
2322
2323 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2324
2325 mutex_unlock(&sdata->local->mtx);
2326
2327 if (already)
2328 goto out;
2329
2330 mutex_lock(&sdata->local->iflist_mtx);
2331 ieee80211_recalc_ps(sdata->local);
2332 mutex_unlock(&sdata->local->iflist_mtx);
2333
2334 ifmgd->probe_send_count = 0;
2335 ieee80211_mgd_probe_ap_send(sdata);
2336 out:
2337 sdata_unlock(sdata);
2338 }
2339
2340 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2341 struct ieee80211_vif *vif)
2342 {
2343 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2344 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2345 struct cfg80211_bss *cbss;
2346 struct sk_buff *skb;
2347 const u8 *ssid;
2348 int ssid_len;
2349
2350 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2351 return NULL;
2352
2353 sdata_assert_lock(sdata);
2354
2355 if (ifmgd->associated)
2356 cbss = ifmgd->associated;
2357 else if (ifmgd->auth_data)
2358 cbss = ifmgd->auth_data->bss;
2359 else if (ifmgd->assoc_data)
2360 cbss = ifmgd->assoc_data->bss;
2361 else
2362 return NULL;
2363
2364 rcu_read_lock();
2365 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2366 if (WARN_ON_ONCE(ssid == NULL))
2367 ssid_len = 0;
2368 else
2369 ssid_len = ssid[1];
2370
2371 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2372 (u32) -1, cbss->channel,
2373 ssid + 2, ssid_len,
2374 NULL, 0, true);
2375 rcu_read_unlock();
2376
2377 return skb;
2378 }
2379 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2380
2381 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2382 const u8 *buf, size_t len, bool tx,
2383 u16 reason)
2384 {
2385 struct ieee80211_event event = {
2386 .type = MLME_EVENT,
2387 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2388 .u.mlme.reason = reason,
2389 };
2390
2391 if (tx)
2392 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2393 else
2394 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2395
2396 drv_event_callback(sdata->local, sdata, &event);
2397 }
2398
2399 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2400 {
2401 struct ieee80211_local *local = sdata->local;
2402 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2403 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2404
2405 sdata_lock(sdata);
2406 if (!ifmgd->associated) {
2407 sdata_unlock(sdata);
2408 return;
2409 }
2410
2411 /* AP is probably out of range (or not reachable for another reason) so
2412 * remove the bss struct for that AP.
2413 */
2414 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2415
2416 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2417 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2418 true, frame_buf);
2419 mutex_lock(&local->mtx);
2420 sdata->vif.csa_active = false;
2421 ifmgd->csa_waiting_bcn = false;
2422 if (sdata->csa_block_tx) {
2423 ieee80211_wake_vif_queues(local, sdata,
2424 IEEE80211_QUEUE_STOP_REASON_CSA);
2425 sdata->csa_block_tx = false;
2426 }
2427 mutex_unlock(&local->mtx);
2428
2429 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2430 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2431
2432 sdata_unlock(sdata);
2433 }
2434
2435 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2436 {
2437 struct ieee80211_sub_if_data *sdata =
2438 container_of(work, struct ieee80211_sub_if_data,
2439 u.mgd.beacon_connection_loss_work);
2440 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2441
2442 if (ifmgd->associated)
2443 ifmgd->beacon_loss_count++;
2444
2445 if (ifmgd->connection_loss) {
2446 sdata_info(sdata, "Connection to AP %pM lost\n",
2447 ifmgd->bssid);
2448 __ieee80211_disconnect(sdata);
2449 } else {
2450 ieee80211_mgd_probe_ap(sdata, true);
2451 }
2452 }
2453
2454 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2455 {
2456 struct ieee80211_sub_if_data *sdata =
2457 container_of(work, struct ieee80211_sub_if_data,
2458 u.mgd.csa_connection_drop_work);
2459
2460 __ieee80211_disconnect(sdata);
2461 }
2462
2463 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2464 {
2465 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2466 struct ieee80211_hw *hw = &sdata->local->hw;
2467
2468 trace_api_beacon_loss(sdata);
2469
2470 sdata->u.mgd.connection_loss = false;
2471 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2472 }
2473 EXPORT_SYMBOL(ieee80211_beacon_loss);
2474
2475 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2476 {
2477 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2478 struct ieee80211_hw *hw = &sdata->local->hw;
2479
2480 trace_api_connection_loss(sdata);
2481
2482 sdata->u.mgd.connection_loss = true;
2483 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2484 }
2485 EXPORT_SYMBOL(ieee80211_connection_loss);
2486
2487
2488 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2489 bool assoc)
2490 {
2491 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2492
2493 sdata_assert_lock(sdata);
2494
2495 if (!assoc) {
2496 /*
2497 * we are not authenticated yet, the only timer that could be
2498 * running is the timeout for the authentication response which
2499 * which is not relevant anymore.
2500 */
2501 del_timer_sync(&sdata->u.mgd.timer);
2502 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2503
2504 eth_zero_addr(sdata->u.mgd.bssid);
2505 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2506 sdata->u.mgd.flags = 0;
2507 mutex_lock(&sdata->local->mtx);
2508 ieee80211_vif_release_channel(sdata);
2509 mutex_unlock(&sdata->local->mtx);
2510 }
2511
2512 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2513 kfree(auth_data);
2514 sdata->u.mgd.auth_data = NULL;
2515 }
2516
2517 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2518 bool assoc, bool abandon)
2519 {
2520 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2521
2522 sdata_assert_lock(sdata);
2523
2524 if (!assoc) {
2525 /*
2526 * we are not associated yet, the only timer that could be
2527 * running is the timeout for the association response which
2528 * which is not relevant anymore.
2529 */
2530 del_timer_sync(&sdata->u.mgd.timer);
2531 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2532
2533 eth_zero_addr(sdata->u.mgd.bssid);
2534 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2535 sdata->u.mgd.flags = 0;
2536 sdata->vif.mu_mimo_owner = false;
2537
2538 mutex_lock(&sdata->local->mtx);
2539 ieee80211_vif_release_channel(sdata);
2540 mutex_unlock(&sdata->local->mtx);
2541
2542 if (abandon)
2543 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2544 }
2545
2546 kfree(assoc_data);
2547 sdata->u.mgd.assoc_data = NULL;
2548 }
2549
2550 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2551 struct ieee80211_mgmt *mgmt, size_t len)
2552 {
2553 struct ieee80211_local *local = sdata->local;
2554 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2555 u8 *pos;
2556 struct ieee802_11_elems elems;
2557 u32 tx_flags = 0;
2558
2559 pos = mgmt->u.auth.variable;
2560 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2561 if (!elems.challenge)
2562 return;
2563 auth_data->expected_transaction = 4;
2564 drv_mgd_prepare_tx(sdata->local, sdata);
2565 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2566 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2567 IEEE80211_TX_INTFL_MLME_CONN_TX;
2568 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2569 elems.challenge - 2, elems.challenge_len + 2,
2570 auth_data->bss->bssid, auth_data->bss->bssid,
2571 auth_data->key, auth_data->key_len,
2572 auth_data->key_idx, tx_flags);
2573 }
2574
2575 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2576 struct ieee80211_mgmt *mgmt, size_t len)
2577 {
2578 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2579 u8 bssid[ETH_ALEN];
2580 u16 auth_alg, auth_transaction, status_code;
2581 struct sta_info *sta;
2582 struct ieee80211_event event = {
2583 .type = MLME_EVENT,
2584 .u.mlme.data = AUTH_EVENT,
2585 };
2586
2587 sdata_assert_lock(sdata);
2588
2589 if (len < 24 + 6)
2590 return;
2591
2592 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2593 return;
2594
2595 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2596
2597 if (!ether_addr_equal(bssid, mgmt->bssid))
2598 return;
2599
2600 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2601 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2602 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2603
2604 if (auth_alg != ifmgd->auth_data->algorithm ||
2605 auth_transaction != ifmgd->auth_data->expected_transaction) {
2606 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2607 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2608 auth_transaction,
2609 ifmgd->auth_data->expected_transaction);
2610 return;
2611 }
2612
2613 if (status_code != WLAN_STATUS_SUCCESS) {
2614 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2615 mgmt->sa, status_code);
2616 ieee80211_destroy_auth_data(sdata, false);
2617 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2618 event.u.mlme.status = MLME_DENIED;
2619 event.u.mlme.reason = status_code;
2620 drv_event_callback(sdata->local, sdata, &event);
2621 return;
2622 }
2623
2624 switch (ifmgd->auth_data->algorithm) {
2625 case WLAN_AUTH_OPEN:
2626 case WLAN_AUTH_LEAP:
2627 case WLAN_AUTH_FT:
2628 case WLAN_AUTH_SAE:
2629 break;
2630 case WLAN_AUTH_SHARED_KEY:
2631 if (ifmgd->auth_data->expected_transaction != 4) {
2632 ieee80211_auth_challenge(sdata, mgmt, len);
2633 /* need another frame */
2634 return;
2635 }
2636 break;
2637 default:
2638 WARN_ONCE(1, "invalid auth alg %d",
2639 ifmgd->auth_data->algorithm);
2640 return;
2641 }
2642
2643 event.u.mlme.status = MLME_SUCCESS;
2644 drv_event_callback(sdata->local, sdata, &event);
2645 sdata_info(sdata, "authenticated\n");
2646 ifmgd->auth_data->done = true;
2647 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2648 ifmgd->auth_data->timeout_started = true;
2649 run_again(sdata, ifmgd->auth_data->timeout);
2650
2651 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2652 ifmgd->auth_data->expected_transaction != 2) {
2653 /*
2654 * Report auth frame to user space for processing since another
2655 * round of Authentication frames is still needed.
2656 */
2657 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2658 return;
2659 }
2660
2661 /* move station state to auth */
2662 mutex_lock(&sdata->local->sta_mtx);
2663 sta = sta_info_get(sdata, bssid);
2664 if (!sta) {
2665 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2666 goto out_err;
2667 }
2668 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2669 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2670 goto out_err;
2671 }
2672 mutex_unlock(&sdata->local->sta_mtx);
2673
2674 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2675 return;
2676 out_err:
2677 mutex_unlock(&sdata->local->sta_mtx);
2678 /* ignore frame -- wait for timeout */
2679 }
2680
2681 #define case_WLAN(type) \
2682 case WLAN_REASON_##type: return #type
2683
2684 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2685 {
2686 switch (reason_code) {
2687 case_WLAN(UNSPECIFIED);
2688 case_WLAN(PREV_AUTH_NOT_VALID);
2689 case_WLAN(DEAUTH_LEAVING);
2690 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2691 case_WLAN(DISASSOC_AP_BUSY);
2692 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2693 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2694 case_WLAN(DISASSOC_STA_HAS_LEFT);
2695 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2696 case_WLAN(DISASSOC_BAD_POWER);
2697 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2698 case_WLAN(INVALID_IE);
2699 case_WLAN(MIC_FAILURE);
2700 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2701 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2702 case_WLAN(IE_DIFFERENT);
2703 case_WLAN(INVALID_GROUP_CIPHER);
2704 case_WLAN(INVALID_PAIRWISE_CIPHER);
2705 case_WLAN(INVALID_AKMP);
2706 case_WLAN(UNSUPP_RSN_VERSION);
2707 case_WLAN(INVALID_RSN_IE_CAP);
2708 case_WLAN(IEEE8021X_FAILED);
2709 case_WLAN(CIPHER_SUITE_REJECTED);
2710 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2711 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2712 case_WLAN(DISASSOC_LOW_ACK);
2713 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2714 case_WLAN(QSTA_LEAVE_QBSS);
2715 case_WLAN(QSTA_NOT_USE);
2716 case_WLAN(QSTA_REQUIRE_SETUP);
2717 case_WLAN(QSTA_TIMEOUT);
2718 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2719 case_WLAN(MESH_PEER_CANCELED);
2720 case_WLAN(MESH_MAX_PEERS);
2721 case_WLAN(MESH_CONFIG);
2722 case_WLAN(MESH_CLOSE);
2723 case_WLAN(MESH_MAX_RETRIES);
2724 case_WLAN(MESH_CONFIRM_TIMEOUT);
2725 case_WLAN(MESH_INVALID_GTK);
2726 case_WLAN(MESH_INCONSISTENT_PARAM);
2727 case_WLAN(MESH_INVALID_SECURITY);
2728 case_WLAN(MESH_PATH_ERROR);
2729 case_WLAN(MESH_PATH_NOFORWARD);
2730 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2731 case_WLAN(MAC_EXISTS_IN_MBSS);
2732 case_WLAN(MESH_CHAN_REGULATORY);
2733 case_WLAN(MESH_CHAN);
2734 default: return "<unknown>";
2735 }
2736 }
2737
2738 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2739 struct ieee80211_mgmt *mgmt, size_t len)
2740 {
2741 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2742 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2743
2744 sdata_assert_lock(sdata);
2745
2746 if (len < 24 + 2)
2747 return;
2748
2749 if (ifmgd->associated &&
2750 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2751 const u8 *bssid = ifmgd->associated->bssid;
2752
2753 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2754 bssid, reason_code,
2755 ieee80211_get_reason_code_string(reason_code));
2756
2757 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2758
2759 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2760 reason_code);
2761 return;
2762 }
2763
2764 if (ifmgd->assoc_data &&
2765 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2766 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2767
2768 sdata_info(sdata,
2769 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2770 bssid, reason_code,
2771 ieee80211_get_reason_code_string(reason_code));
2772
2773 ieee80211_destroy_assoc_data(sdata, false, true);
2774
2775 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2776 return;
2777 }
2778 }
2779
2780
2781 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2782 struct ieee80211_mgmt *mgmt, size_t len)
2783 {
2784 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2785 u16 reason_code;
2786
2787 sdata_assert_lock(sdata);
2788
2789 if (len < 24 + 2)
2790 return;
2791
2792 if (!ifmgd->associated ||
2793 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2794 return;
2795
2796 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2797
2798 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2799 mgmt->sa, reason_code);
2800
2801 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2802
2803 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2804 }
2805
2806 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2807 u8 *supp_rates, unsigned int supp_rates_len,
2808 u32 *rates, u32 *basic_rates,
2809 bool *have_higher_than_11mbit,
2810 int *min_rate, int *min_rate_index,
2811 int shift, u32 rate_flags)
2812 {
2813 int i, j;
2814
2815 for (i = 0; i < supp_rates_len; i++) {
2816 int rate = supp_rates[i] & 0x7f;
2817 bool is_basic = !!(supp_rates[i] & 0x80);
2818
2819 if ((rate * 5 * (1 << shift)) > 110)
2820 *have_higher_than_11mbit = true;
2821
2822 /*
2823 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2824 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2825 *
2826 * Note: Even through the membership selector and the basic
2827 * rate flag share the same bit, they are not exactly
2828 * the same.
2829 */
2830 if (!!(supp_rates[i] & 0x80) &&
2831 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2832 continue;
2833
2834 for (j = 0; j < sband->n_bitrates; j++) {
2835 struct ieee80211_rate *br;
2836 int brate;
2837
2838 br = &sband->bitrates[j];
2839 if ((rate_flags & br->flags) != rate_flags)
2840 continue;
2841
2842 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2843 if (brate == rate) {
2844 *rates |= BIT(j);
2845 if (is_basic)
2846 *basic_rates |= BIT(j);
2847 if ((rate * 5) < *min_rate) {
2848 *min_rate = rate * 5;
2849 *min_rate_index = j;
2850 }
2851 break;
2852 }
2853 }
2854 }
2855 }
2856
2857 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2858 struct cfg80211_bss *cbss,
2859 struct ieee80211_mgmt *mgmt, size_t len)
2860 {
2861 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2862 struct ieee80211_local *local = sdata->local;
2863 struct ieee80211_supported_band *sband;
2864 struct sta_info *sta;
2865 u8 *pos;
2866 u16 capab_info, aid;
2867 struct ieee802_11_elems elems;
2868 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2869 const struct cfg80211_bss_ies *bss_ies = NULL;
2870 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2871 u32 changed = 0;
2872 int err;
2873 bool ret;
2874
2875 /* AssocResp and ReassocResp have identical structure */
2876
2877 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2878 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2879
2880 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2881 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2882 aid);
2883 aid &= ~(BIT(15) | BIT(14));
2884
2885 ifmgd->broken_ap = false;
2886
2887 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2888 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2889 aid);
2890 aid = 0;
2891 ifmgd->broken_ap = true;
2892 }
2893
2894 pos = mgmt->u.assoc_resp.variable;
2895 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2896
2897 if (!elems.supp_rates) {
2898 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2899 return false;
2900 }
2901
2902 ifmgd->aid = aid;
2903 ifmgd->tdls_chan_switch_prohibited =
2904 elems.ext_capab && elems.ext_capab_len >= 5 &&
2905 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2906
2907 /*
2908 * Some APs are erroneously not including some information in their
2909 * (re)association response frames. Try to recover by using the data
2910 * from the beacon or probe response. This seems to afflict mobile
2911 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2912 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2913 */
2914 if ((assoc_data->wmm && !elems.wmm_param) ||
2915 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2916 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2917 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2918 (!elems.vht_cap_elem || !elems.vht_operation))) {
2919 const struct cfg80211_bss_ies *ies;
2920 struct ieee802_11_elems bss_elems;
2921
2922 rcu_read_lock();
2923 ies = rcu_dereference(cbss->ies);
2924 if (ies)
2925 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2926 GFP_ATOMIC);
2927 rcu_read_unlock();
2928 if (!bss_ies)
2929 return false;
2930
2931 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2932 false, &bss_elems);
2933 if (assoc_data->wmm &&
2934 !elems.wmm_param && bss_elems.wmm_param) {
2935 elems.wmm_param = bss_elems.wmm_param;
2936 sdata_info(sdata,
2937 "AP bug: WMM param missing from AssocResp\n");
2938 }
2939
2940 /*
2941 * Also check if we requested HT/VHT, otherwise the AP doesn't
2942 * have to include the IEs in the (re)association response.
2943 */
2944 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2945 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2946 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2947 sdata_info(sdata,
2948 "AP bug: HT capability missing from AssocResp\n");
2949 }
2950 if (!elems.ht_operation && bss_elems.ht_operation &&
2951 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2952 elems.ht_operation = bss_elems.ht_operation;
2953 sdata_info(sdata,
2954 "AP bug: HT operation missing from AssocResp\n");
2955 }
2956 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2957 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2958 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2959 sdata_info(sdata,
2960 "AP bug: VHT capa missing from AssocResp\n");
2961 }
2962 if (!elems.vht_operation && bss_elems.vht_operation &&
2963 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2964 elems.vht_operation = bss_elems.vht_operation;
2965 sdata_info(sdata,
2966 "AP bug: VHT operation missing from AssocResp\n");
2967 }
2968 }
2969
2970 /*
2971 * We previously checked these in the beacon/probe response, so
2972 * they should be present here. This is just a safety net.
2973 */
2974 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2975 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2976 sdata_info(sdata,
2977 "HT AP is missing WMM params or HT capability/operation\n");
2978 ret = false;
2979 goto out;
2980 }
2981
2982 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2983 (!elems.vht_cap_elem || !elems.vht_operation)) {
2984 sdata_info(sdata,
2985 "VHT AP is missing VHT capability/operation\n");
2986 ret = false;
2987 goto out;
2988 }
2989
2990 mutex_lock(&sdata->local->sta_mtx);
2991 /*
2992 * station info was already allocated and inserted before
2993 * the association and should be available to us
2994 */
2995 sta = sta_info_get(sdata, cbss->bssid);
2996 if (WARN_ON(!sta)) {
2997 mutex_unlock(&sdata->local->sta_mtx);
2998 ret = false;
2999 goto out;
3000 }
3001
3002 sband = ieee80211_get_sband(sdata);
3003 if (!sband) {
3004 mutex_unlock(&sdata->local->sta_mtx);
3005 ret = false;
3006 goto out;
3007 }
3008
3009 /* Set up internal HT/VHT capabilities */
3010 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3011 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3012 elems.ht_cap_elem, sta);
3013
3014 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3015 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3016 elems.vht_cap_elem, sta);
3017
3018 /*
3019 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3020 * in their association response, so ignore that data for our own
3021 * configuration. If it changed since the last beacon, we'll get the
3022 * next beacon and update then.
3023 */
3024
3025 /*
3026 * If an operating mode notification IE is present, override the
3027 * NSS calculation (that would be done in rate_control_rate_init())
3028 * and use the # of streams from that element.
3029 */
3030 if (elems.opmode_notif &&
3031 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3032 u8 nss;
3033
3034 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3035 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3036 nss += 1;
3037 sta->sta.rx_nss = nss;
3038 }
3039
3040 rate_control_rate_init(sta);
3041
3042 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3043 set_sta_flag(sta, WLAN_STA_MFP);
3044 sta->sta.mfp = true;
3045 } else {
3046 sta->sta.mfp = false;
3047 }
3048
3049 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3050
3051 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3052 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3053 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3054 if (err) {
3055 sdata_info(sdata,
3056 "failed to move station %pM to desired state\n",
3057 sta->sta.addr);
3058 WARN_ON(__sta_info_destroy(sta));
3059 mutex_unlock(&sdata->local->sta_mtx);
3060 ret = false;
3061 goto out;
3062 }
3063
3064 mutex_unlock(&sdata->local->sta_mtx);
3065
3066 /*
3067 * Always handle WMM once after association regardless
3068 * of the first value the AP uses. Setting -1 here has
3069 * that effect because the AP values is an unsigned
3070 * 4-bit value.
3071 */
3072 ifmgd->wmm_last_param_set = -1;
3073
3074 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3075 ieee80211_set_wmm_default(sdata, false, false);
3076 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3077 elems.wmm_param_len)) {
3078 /* still enable QoS since we might have HT/VHT */
3079 ieee80211_set_wmm_default(sdata, false, true);
3080 /* set the disable-WMM flag in this case to disable
3081 * tracking WMM parameter changes in the beacon if
3082 * the parameters weren't actually valid. Doing so
3083 * avoids changing parameters very strangely when
3084 * the AP is going back and forth between valid and
3085 * invalid parameters.
3086 */
3087 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3088 }
3089 changed |= BSS_CHANGED_QOS;
3090
3091 /* set AID and assoc capability,
3092 * ieee80211_set_associated() will tell the driver */
3093 bss_conf->aid = aid;
3094 bss_conf->assoc_capability = capab_info;
3095 ieee80211_set_associated(sdata, cbss, changed);
3096
3097 /*
3098 * If we're using 4-addr mode, let the AP know that we're
3099 * doing so, so that it can create the STA VLAN on its side
3100 */
3101 if (ifmgd->use_4addr)
3102 ieee80211_send_4addr_nullfunc(local, sdata);
3103
3104 /*
3105 * Start timer to probe the connection to the AP now.
3106 * Also start the timer that will detect beacon loss.
3107 */
3108 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3109 ieee80211_sta_reset_beacon_monitor(sdata);
3110
3111 ret = true;
3112 out:
3113 kfree(bss_ies);
3114 return ret;
3115 }
3116
3117 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3118 struct ieee80211_mgmt *mgmt,
3119 size_t len)
3120 {
3121 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3122 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3123 u16 capab_info, status_code, aid;
3124 struct ieee802_11_elems elems;
3125 int ac, uapsd_queues = -1;
3126 u8 *pos;
3127 bool reassoc;
3128 struct cfg80211_bss *bss;
3129 struct ieee80211_event event = {
3130 .type = MLME_EVENT,
3131 .u.mlme.data = ASSOC_EVENT,
3132 };
3133
3134 sdata_assert_lock(sdata);
3135
3136 if (!assoc_data)
3137 return;
3138 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3139 return;
3140
3141 /*
3142 * AssocResp and ReassocResp have identical structure, so process both
3143 * of them in this function.
3144 */
3145
3146 if (len < 24 + 6)
3147 return;
3148
3149 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3150 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3151 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3152 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3153
3154 sdata_info(sdata,
3155 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3156 reassoc ? "Rea" : "A", mgmt->sa,
3157 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3158
3159 pos = mgmt->u.assoc_resp.variable;
3160 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3161
3162 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3163 elems.timeout_int &&
3164 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3165 u32 tu, ms;
3166 tu = le32_to_cpu(elems.timeout_int->value);
3167 ms = tu * 1024 / 1000;
3168 sdata_info(sdata,
3169 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3170 mgmt->sa, tu, ms);
3171 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3172 assoc_data->timeout_started = true;
3173 if (ms > IEEE80211_ASSOC_TIMEOUT)
3174 run_again(sdata, assoc_data->timeout);
3175 return;
3176 }
3177
3178 bss = assoc_data->bss;
3179
3180 if (status_code != WLAN_STATUS_SUCCESS) {
3181 sdata_info(sdata, "%pM denied association (code=%d)\n",
3182 mgmt->sa, status_code);
3183 ieee80211_destroy_assoc_data(sdata, false, false);
3184 event.u.mlme.status = MLME_DENIED;
3185 event.u.mlme.reason = status_code;
3186 drv_event_callback(sdata->local, sdata, &event);
3187 } else {
3188 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3189 /* oops -- internal error -- send timeout for now */
3190 ieee80211_destroy_assoc_data(sdata, false, false);
3191 cfg80211_assoc_timeout(sdata->dev, bss);
3192 return;
3193 }
3194 event.u.mlme.status = MLME_SUCCESS;
3195 drv_event_callback(sdata->local, sdata, &event);
3196 sdata_info(sdata, "associated\n");
3197
3198 /*
3199 * destroy assoc_data afterwards, as otherwise an idle
3200 * recalc after assoc_data is NULL but before associated
3201 * is set can cause the interface to go idle
3202 */
3203 ieee80211_destroy_assoc_data(sdata, true, false);
3204
3205 /* get uapsd queues configuration */
3206 uapsd_queues = 0;
3207 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3208 if (sdata->tx_conf[ac].uapsd)
3209 uapsd_queues |= BIT(ac);
3210 }
3211
3212 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3213 }
3214
3215 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3216 struct ieee80211_mgmt *mgmt, size_t len,
3217 struct ieee80211_rx_status *rx_status,
3218 struct ieee802_11_elems *elems)
3219 {
3220 struct ieee80211_local *local = sdata->local;
3221 struct ieee80211_bss *bss;
3222 struct ieee80211_channel *channel;
3223
3224 sdata_assert_lock(sdata);
3225
3226 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3227 if (!channel)
3228 return;
3229
3230 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3231 channel);
3232 if (bss) {
3233 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3234 ieee80211_rx_bss_put(local, bss);
3235 }
3236 }
3237
3238
3239 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3240 struct sk_buff *skb)
3241 {
3242 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3243 struct ieee80211_if_managed *ifmgd;
3244 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3245 size_t baselen, len = skb->len;
3246 struct ieee802_11_elems elems;
3247
3248 ifmgd = &sdata->u.mgd;
3249
3250 sdata_assert_lock(sdata);
3251
3252 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3253 return; /* ignore ProbeResp to foreign address */
3254
3255 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3256 if (baselen > len)
3257 return;
3258
3259 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3260 false, &elems);
3261
3262 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3263
3264 if (ifmgd->associated &&
3265 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3266 ieee80211_reset_ap_probe(sdata);
3267 }
3268
3269 /*
3270 * This is the canonical list of information elements we care about,
3271 * the filter code also gives us all changes to the Microsoft OUI
3272 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3273 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3274 * changes to requested client power.
3275 *
3276 * We implement beacon filtering in software since that means we can
3277 * avoid processing the frame here and in cfg80211, and userspace
3278 * will not be able to tell whether the hardware supports it or not.
3279 *
3280 * XXX: This list needs to be dynamic -- userspace needs to be able to
3281 * add items it requires. It also needs to be able to tell us to
3282 * look out for other vendor IEs.
3283 */
3284 static const u64 care_about_ies =
3285 (1ULL << WLAN_EID_COUNTRY) |
3286 (1ULL << WLAN_EID_ERP_INFO) |
3287 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3288 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3289 (1ULL << WLAN_EID_HT_CAPABILITY) |
3290 (1ULL << WLAN_EID_HT_OPERATION) |
3291 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3292
3293 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3294 struct ieee80211_mgmt *mgmt, size_t len,
3295 struct ieee80211_rx_status *rx_status)
3296 {
3297 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3298 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3299 size_t baselen;
3300 struct ieee802_11_elems elems;
3301 struct ieee80211_local *local = sdata->local;
3302 struct ieee80211_chanctx_conf *chanctx_conf;
3303 struct ieee80211_channel *chan;
3304 struct sta_info *sta;
3305 u32 changed = 0;
3306 bool erp_valid;
3307 u8 erp_value = 0;
3308 u32 ncrc;
3309 u8 *bssid;
3310 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3311
3312 sdata_assert_lock(sdata);
3313
3314 /* Process beacon from the current BSS */
3315 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3316 if (baselen > len)
3317 return;
3318
3319 rcu_read_lock();
3320 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3321 if (!chanctx_conf) {
3322 rcu_read_unlock();
3323 return;
3324 }
3325
3326 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3327 rcu_read_unlock();
3328 return;
3329 }
3330 chan = chanctx_conf->def.chan;
3331 rcu_read_unlock();
3332
3333 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3334 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3335 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3336 len - baselen, false, &elems);
3337
3338 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3339 if (elems.tim && !elems.parse_error) {
3340 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3341 ifmgd->dtim_period = tim_ie->dtim_period;
3342 }
3343 ifmgd->have_beacon = true;
3344 ifmgd->assoc_data->need_beacon = false;
3345 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3346 sdata->vif.bss_conf.sync_tsf =
3347 le64_to_cpu(mgmt->u.beacon.timestamp);
3348 sdata->vif.bss_conf.sync_device_ts =
3349 rx_status->device_timestamp;
3350 if (elems.tim)
3351 sdata->vif.bss_conf.sync_dtim_count =
3352 elems.tim->dtim_count;
3353 else
3354 sdata->vif.bss_conf.sync_dtim_count = 0;
3355 }
3356 /* continue assoc process */
3357 ifmgd->assoc_data->timeout = jiffies;
3358 ifmgd->assoc_data->timeout_started = true;
3359 run_again(sdata, ifmgd->assoc_data->timeout);
3360 return;
3361 }
3362
3363 if (!ifmgd->associated ||
3364 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3365 return;
3366 bssid = ifmgd->associated->bssid;
3367
3368 /* Track average RSSI from the Beacon frames of the current AP */
3369 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3370 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3371 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3372 ifmgd->last_cqm_event_signal = 0;
3373 ifmgd->count_beacon_signal = 1;
3374 ifmgd->last_ave_beacon_signal = 0;
3375 } else {
3376 ifmgd->count_beacon_signal++;
3377 }
3378
3379 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3380
3381 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3382 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3383 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3384 int last_sig = ifmgd->last_ave_beacon_signal;
3385 struct ieee80211_event event = {
3386 .type = RSSI_EVENT,
3387 };
3388
3389 /*
3390 * if signal crosses either of the boundaries, invoke callback
3391 * with appropriate parameters
3392 */
3393 if (sig > ifmgd->rssi_max_thold &&
3394 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3395 ifmgd->last_ave_beacon_signal = sig;
3396 event.u.rssi.data = RSSI_EVENT_HIGH;
3397 drv_event_callback(local, sdata, &event);
3398 } else if (sig < ifmgd->rssi_min_thold &&
3399 (last_sig >= ifmgd->rssi_max_thold ||
3400 last_sig == 0)) {
3401 ifmgd->last_ave_beacon_signal = sig;
3402 event.u.rssi.data = RSSI_EVENT_LOW;
3403 drv_event_callback(local, sdata, &event);
3404 }
3405 }
3406
3407 if (bss_conf->cqm_rssi_thold &&
3408 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3409 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3410 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3411 int last_event = ifmgd->last_cqm_event_signal;
3412 int thold = bss_conf->cqm_rssi_thold;
3413 int hyst = bss_conf->cqm_rssi_hyst;
3414
3415 if (sig < thold &&
3416 (last_event == 0 || sig < last_event - hyst)) {
3417 ifmgd->last_cqm_event_signal = sig;
3418 ieee80211_cqm_rssi_notify(
3419 &sdata->vif,
3420 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3421 GFP_KERNEL);
3422 } else if (sig > thold &&
3423 (last_event == 0 || sig > last_event + hyst)) {
3424 ifmgd->last_cqm_event_signal = sig;
3425 ieee80211_cqm_rssi_notify(
3426 &sdata->vif,
3427 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3428 GFP_KERNEL);
3429 }
3430 }
3431
3432 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3433 mlme_dbg_ratelimited(sdata,
3434 "cancelling AP probe due to a received beacon\n");
3435 ieee80211_reset_ap_probe(sdata);
3436 }
3437
3438 /*
3439 * Push the beacon loss detection into the future since
3440 * we are processing a beacon from the AP just now.
3441 */
3442 ieee80211_sta_reset_beacon_monitor(sdata);
3443
3444 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3445 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3446 len - baselen, false, &elems,
3447 care_about_ies, ncrc);
3448
3449 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3450 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3451 if (local->hw.conf.dynamic_ps_timeout > 0) {
3452 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3453 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3454 ieee80211_hw_config(local,
3455 IEEE80211_CONF_CHANGE_PS);
3456 }
3457 ieee80211_send_nullfunc(local, sdata, false);
3458 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3459 local->pspolling = true;
3460
3461 /*
3462 * Here is assumed that the driver will be
3463 * able to send ps-poll frame and receive a
3464 * response even though power save mode is
3465 * enabled, but some drivers might require
3466 * to disable power save here. This needs
3467 * to be investigated.
3468 */
3469 ieee80211_send_pspoll(local, sdata);
3470 }
3471 }
3472
3473 if (sdata->vif.p2p ||
3474 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3475 struct ieee80211_p2p_noa_attr noa = {};
3476 int ret;
3477
3478 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3479 len - baselen,
3480 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3481 (u8 *) &noa, sizeof(noa));
3482 if (ret >= 2) {
3483 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3484 /* valid noa_attr and index changed */
3485 sdata->u.mgd.p2p_noa_index = noa.index;
3486 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3487 changed |= BSS_CHANGED_P2P_PS;
3488 /*
3489 * make sure we update all information, the CRC
3490 * mechanism doesn't look at P2P attributes.
3491 */
3492 ifmgd->beacon_crc_valid = false;
3493 }
3494 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3495 /* noa_attr not found and we had valid noa_attr before */
3496 sdata->u.mgd.p2p_noa_index = -1;
3497 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3498 changed |= BSS_CHANGED_P2P_PS;
3499 ifmgd->beacon_crc_valid = false;
3500 }
3501 }
3502
3503 if (ifmgd->csa_waiting_bcn)
3504 ieee80211_chswitch_post_beacon(sdata);
3505
3506 /*
3507 * Update beacon timing and dtim count on every beacon appearance. This
3508 * will allow the driver to use the most updated values. Do it before
3509 * comparing this one with last received beacon.
3510 * IMPORTANT: These parameters would possibly be out of sync by the time
3511 * the driver will use them. The synchronized view is currently
3512 * guaranteed only in certain callbacks.
3513 */
3514 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3515 sdata->vif.bss_conf.sync_tsf =
3516 le64_to_cpu(mgmt->u.beacon.timestamp);
3517 sdata->vif.bss_conf.sync_device_ts =
3518 rx_status->device_timestamp;
3519 if (elems.tim)
3520 sdata->vif.bss_conf.sync_dtim_count =
3521 elems.tim->dtim_count;
3522 else
3523 sdata->vif.bss_conf.sync_dtim_count = 0;
3524 }
3525
3526 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3527 return;
3528 ifmgd->beacon_crc = ncrc;
3529 ifmgd->beacon_crc_valid = true;
3530
3531 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3532
3533 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3534 rx_status->device_timestamp,
3535 &elems, true);
3536
3537 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3538 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3539 elems.wmm_param_len))
3540 changed |= BSS_CHANGED_QOS;
3541
3542 /*
3543 * If we haven't had a beacon before, tell the driver about the
3544 * DTIM period (and beacon timing if desired) now.
3545 */
3546 if (!ifmgd->have_beacon) {
3547 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3548 if (elems.tim)
3549 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3550 else
3551 bss_conf->dtim_period = 1;
3552
3553 changed |= BSS_CHANGED_BEACON_INFO;
3554 ifmgd->have_beacon = true;
3555
3556 mutex_lock(&local->iflist_mtx);
3557 ieee80211_recalc_ps(local);
3558 mutex_unlock(&local->iflist_mtx);
3559
3560 ieee80211_recalc_ps_vif(sdata);
3561 }
3562
3563 if (elems.erp_info) {
3564 erp_valid = true;
3565 erp_value = elems.erp_info[0];
3566 } else {
3567 erp_valid = false;
3568 }
3569 changed |= ieee80211_handle_bss_capability(sdata,
3570 le16_to_cpu(mgmt->u.beacon.capab_info),
3571 erp_valid, erp_value);
3572
3573 mutex_lock(&local->sta_mtx);
3574 sta = sta_info_get(sdata, bssid);
3575
3576 if (ieee80211_config_bw(sdata, sta,
3577 elems.ht_cap_elem, elems.ht_operation,
3578 elems.vht_operation, bssid, &changed)) {
3579 mutex_unlock(&local->sta_mtx);
3580 sdata_info(sdata,
3581 "failed to follow AP %pM bandwidth change, disconnect\n",
3582 bssid);
3583 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3584 WLAN_REASON_DEAUTH_LEAVING,
3585 true, deauth_buf);
3586 ieee80211_report_disconnect(sdata, deauth_buf,
3587 sizeof(deauth_buf), true,
3588 WLAN_REASON_DEAUTH_LEAVING);
3589 return;
3590 }
3591
3592 if (sta && elems.opmode_notif)
3593 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3594 rx_status->band);
3595 mutex_unlock(&local->sta_mtx);
3596
3597 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3598 elems.country_elem,
3599 elems.country_elem_len,
3600 elems.pwr_constr_elem,
3601 elems.cisco_dtpc_elem);
3602
3603 ieee80211_bss_info_change_notify(sdata, changed);
3604 }
3605
3606 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3607 struct sk_buff *skb)
3608 {
3609 struct ieee80211_rx_status *rx_status;
3610 struct ieee80211_mgmt *mgmt;
3611 u16 fc;
3612 struct ieee802_11_elems elems;
3613 int ies_len;
3614
3615 rx_status = (struct ieee80211_rx_status *) skb->cb;
3616 mgmt = (struct ieee80211_mgmt *) skb->data;
3617 fc = le16_to_cpu(mgmt->frame_control);
3618
3619 sdata_lock(sdata);
3620
3621 switch (fc & IEEE80211_FCTL_STYPE) {
3622 case IEEE80211_STYPE_BEACON:
3623 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3624 break;
3625 case IEEE80211_STYPE_PROBE_RESP:
3626 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3627 break;
3628 case IEEE80211_STYPE_AUTH:
3629 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3630 break;
3631 case IEEE80211_STYPE_DEAUTH:
3632 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3633 break;
3634 case IEEE80211_STYPE_DISASSOC:
3635 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3636 break;
3637 case IEEE80211_STYPE_ASSOC_RESP:
3638 case IEEE80211_STYPE_REASSOC_RESP:
3639 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3640 break;
3641 case IEEE80211_STYPE_ACTION:
3642 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3643 ies_len = skb->len -
3644 offsetof(struct ieee80211_mgmt,
3645 u.action.u.chan_switch.variable);
3646
3647 if (ies_len < 0)
3648 break;
3649
3650 ieee802_11_parse_elems(
3651 mgmt->u.action.u.chan_switch.variable,
3652 ies_len, true, &elems);
3653
3654 if (elems.parse_error)
3655 break;
3656
3657 ieee80211_sta_process_chanswitch(sdata,
3658 rx_status->mactime,
3659 rx_status->device_timestamp,
3660 &elems, false);
3661 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3662 ies_len = skb->len -
3663 offsetof(struct ieee80211_mgmt,
3664 u.action.u.ext_chan_switch.variable);
3665
3666 if (ies_len < 0)
3667 break;
3668
3669 ieee802_11_parse_elems(
3670 mgmt->u.action.u.ext_chan_switch.variable,
3671 ies_len, true, &elems);
3672
3673 if (elems.parse_error)
3674 break;
3675
3676 /* for the handling code pretend this was also an IE */
3677 elems.ext_chansw_ie =
3678 &mgmt->u.action.u.ext_chan_switch.data;
3679
3680 ieee80211_sta_process_chanswitch(sdata,
3681 rx_status->mactime,
3682 rx_status->device_timestamp,
3683 &elems, false);
3684 }
3685 break;
3686 }
3687 sdata_unlock(sdata);
3688 }
3689
3690 static void ieee80211_sta_timer(unsigned long data)
3691 {
3692 struct ieee80211_sub_if_data *sdata =
3693 (struct ieee80211_sub_if_data *) data;
3694
3695 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3696 }
3697
3698 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3699 u8 *bssid, u8 reason, bool tx)
3700 {
3701 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3702
3703 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3704 tx, frame_buf);
3705
3706 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3707 reason);
3708 }
3709
3710 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3711 {
3712 struct ieee80211_local *local = sdata->local;
3713 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3714 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3715 u32 tx_flags = 0;
3716 u16 trans = 1;
3717 u16 status = 0;
3718
3719 sdata_assert_lock(sdata);
3720
3721 if (WARN_ON_ONCE(!auth_data))
3722 return -EINVAL;
3723
3724 auth_data->tries++;
3725
3726 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3727 sdata_info(sdata, "authentication with %pM timed out\n",
3728 auth_data->bss->bssid);
3729
3730 /*
3731 * Most likely AP is not in the range so remove the
3732 * bss struct for that AP.
3733 */
3734 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3735
3736 return -ETIMEDOUT;
3737 }
3738
3739 drv_mgd_prepare_tx(local, sdata);
3740
3741 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3742 auth_data->bss->bssid, auth_data->tries,
3743 IEEE80211_AUTH_MAX_TRIES);
3744
3745 auth_data->expected_transaction = 2;
3746
3747 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3748 trans = auth_data->sae_trans;
3749 status = auth_data->sae_status;
3750 auth_data->expected_transaction = trans;
3751 }
3752
3753 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3754 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3755 IEEE80211_TX_INTFL_MLME_CONN_TX;
3756
3757 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3758 auth_data->data, auth_data->data_len,
3759 auth_data->bss->bssid,
3760 auth_data->bss->bssid, NULL, 0, 0,
3761 tx_flags);
3762
3763 if (tx_flags == 0) {
3764 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3765 auth_data->timeout_started = true;
3766 run_again(sdata, auth_data->timeout);
3767 } else {
3768 auth_data->timeout =
3769 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3770 auth_data->timeout_started = true;
3771 run_again(sdata, auth_data->timeout);
3772 }
3773
3774 return 0;
3775 }
3776
3777 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3778 {
3779 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3780 struct ieee80211_local *local = sdata->local;
3781
3782 sdata_assert_lock(sdata);
3783
3784 assoc_data->tries++;
3785 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3786 sdata_info(sdata, "association with %pM timed out\n",
3787 assoc_data->bss->bssid);
3788
3789 /*
3790 * Most likely AP is not in the range so remove the
3791 * bss struct for that AP.
3792 */
3793 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3794
3795 return -ETIMEDOUT;
3796 }
3797
3798 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3799 assoc_data->bss->bssid, assoc_data->tries,
3800 IEEE80211_ASSOC_MAX_TRIES);
3801 ieee80211_send_assoc(sdata);
3802
3803 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3804 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3805 assoc_data->timeout_started = true;
3806 run_again(sdata, assoc_data->timeout);
3807 } else {
3808 assoc_data->timeout =
3809 round_jiffies_up(jiffies +
3810 IEEE80211_ASSOC_TIMEOUT_LONG);
3811 assoc_data->timeout_started = true;
3812 run_again(sdata, assoc_data->timeout);
3813 }
3814
3815 return 0;
3816 }
3817
3818 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3819 __le16 fc, bool acked)
3820 {
3821 struct ieee80211_local *local = sdata->local;
3822
3823 sdata->u.mgd.status_fc = fc;
3824 sdata->u.mgd.status_acked = acked;
3825 sdata->u.mgd.status_received = true;
3826
3827 ieee80211_queue_work(&local->hw, &sdata->work);
3828 }
3829
3830 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3831 {
3832 struct ieee80211_local *local = sdata->local;
3833 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3834
3835 sdata_lock(sdata);
3836
3837 if (ifmgd->status_received) {
3838 __le16 fc = ifmgd->status_fc;
3839 bool status_acked = ifmgd->status_acked;
3840
3841 ifmgd->status_received = false;
3842 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3843 if (status_acked) {
3844 ifmgd->auth_data->timeout =
3845 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3846 run_again(sdata, ifmgd->auth_data->timeout);
3847 } else {
3848 ifmgd->auth_data->timeout = jiffies - 1;
3849 }
3850 ifmgd->auth_data->timeout_started = true;
3851 } else if (ifmgd->assoc_data &&
3852 (ieee80211_is_assoc_req(fc) ||
3853 ieee80211_is_reassoc_req(fc))) {
3854 if (status_acked) {
3855 ifmgd->assoc_data->timeout =
3856 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3857 run_again(sdata, ifmgd->assoc_data->timeout);
3858 } else {
3859 ifmgd->assoc_data->timeout = jiffies - 1;
3860 }
3861 ifmgd->assoc_data->timeout_started = true;
3862 }
3863 }
3864
3865 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3866 time_after(jiffies, ifmgd->auth_data->timeout)) {
3867 if (ifmgd->auth_data->done) {
3868 /*
3869 * ok ... we waited for assoc but userspace didn't,
3870 * so let's just kill the auth data
3871 */
3872 ieee80211_destroy_auth_data(sdata, false);
3873 } else if (ieee80211_auth(sdata)) {
3874 u8 bssid[ETH_ALEN];
3875 struct ieee80211_event event = {
3876 .type = MLME_EVENT,
3877 .u.mlme.data = AUTH_EVENT,
3878 .u.mlme.status = MLME_TIMEOUT,
3879 };
3880
3881 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3882
3883 ieee80211_destroy_auth_data(sdata, false);
3884
3885 cfg80211_auth_timeout(sdata->dev, bssid);
3886 drv_event_callback(sdata->local, sdata, &event);
3887 }
3888 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3889 run_again(sdata, ifmgd->auth_data->timeout);
3890
3891 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3892 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3893 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3894 ieee80211_do_assoc(sdata)) {
3895 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3896 struct ieee80211_event event = {
3897 .type = MLME_EVENT,
3898 .u.mlme.data = ASSOC_EVENT,
3899 .u.mlme.status = MLME_TIMEOUT,
3900 };
3901
3902 ieee80211_destroy_assoc_data(sdata, false, false);
3903 cfg80211_assoc_timeout(sdata->dev, bss);
3904 drv_event_callback(sdata->local, sdata, &event);
3905 }
3906 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3907 run_again(sdata, ifmgd->assoc_data->timeout);
3908
3909 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3910 ifmgd->associated) {
3911 u8 bssid[ETH_ALEN];
3912 int max_tries;
3913
3914 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3915
3916 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3917 max_tries = max_nullfunc_tries;
3918 else
3919 max_tries = max_probe_tries;
3920
3921 /* ACK received for nullfunc probing frame */
3922 if (!ifmgd->probe_send_count)
3923 ieee80211_reset_ap_probe(sdata);
3924 else if (ifmgd->nullfunc_failed) {
3925 if (ifmgd->probe_send_count < max_tries) {
3926 mlme_dbg(sdata,
3927 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3928 bssid, ifmgd->probe_send_count,
3929 max_tries);
3930 ieee80211_mgd_probe_ap_send(sdata);
3931 } else {
3932 mlme_dbg(sdata,
3933 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3934 bssid);
3935 ieee80211_sta_connection_lost(sdata, bssid,
3936 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3937 false);
3938 }
3939 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3940 run_again(sdata, ifmgd->probe_timeout);
3941 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3942 mlme_dbg(sdata,
3943 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3944 bssid, probe_wait_ms);
3945 ieee80211_sta_connection_lost(sdata, bssid,
3946 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3947 } else if (ifmgd->probe_send_count < max_tries) {
3948 mlme_dbg(sdata,
3949 "No probe response from AP %pM after %dms, try %d/%i\n",
3950 bssid, probe_wait_ms,
3951 ifmgd->probe_send_count, max_tries);
3952 ieee80211_mgd_probe_ap_send(sdata);
3953 } else {
3954 /*
3955 * We actually lost the connection ... or did we?
3956 * Let's make sure!
3957 */
3958 mlme_dbg(sdata,
3959 "No probe response from AP %pM after %dms, disconnecting.\n",
3960 bssid, probe_wait_ms);
3961
3962 ieee80211_sta_connection_lost(sdata, bssid,
3963 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3964 }
3965 }
3966
3967 sdata_unlock(sdata);
3968 }
3969
3970 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3971 {
3972 struct ieee80211_sub_if_data *sdata =
3973 (struct ieee80211_sub_if_data *) data;
3974 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3975
3976 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3977 return;
3978
3979 sdata->u.mgd.connection_loss = false;
3980 ieee80211_queue_work(&sdata->local->hw,
3981 &sdata->u.mgd.beacon_connection_loss_work);
3982 }
3983
3984 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3985 {
3986 struct ieee80211_sub_if_data *sdata =
3987 (struct ieee80211_sub_if_data *) data;
3988 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3989 struct ieee80211_local *local = sdata->local;
3990
3991 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3992 return;
3993
3994 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3995 }
3996
3997 static void ieee80211_sta_monitor_work(struct work_struct *work)
3998 {
3999 struct ieee80211_sub_if_data *sdata =
4000 container_of(work, struct ieee80211_sub_if_data,
4001 u.mgd.monitor_work);
4002
4003 ieee80211_mgd_probe_ap(sdata, false);
4004 }
4005
4006 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4007 {
4008 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4009 __ieee80211_stop_poll(sdata);
4010
4011 /* let's probe the connection once */
4012 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4013 ieee80211_queue_work(&sdata->local->hw,
4014 &sdata->u.mgd.monitor_work);
4015 }
4016 }
4017
4018 #ifdef CONFIG_PM
4019 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4020 {
4021 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4022 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4023
4024 sdata_lock(sdata);
4025
4026 if (ifmgd->auth_data || ifmgd->assoc_data) {
4027 const u8 *bssid = ifmgd->auth_data ?
4028 ifmgd->auth_data->bss->bssid :
4029 ifmgd->assoc_data->bss->bssid;
4030
4031 /*
4032 * If we are trying to authenticate / associate while suspending,
4033 * cfg80211 won't know and won't actually abort those attempts,
4034 * thus we need to do that ourselves.
4035 */
4036 ieee80211_send_deauth_disassoc(sdata, bssid,
4037 IEEE80211_STYPE_DEAUTH,
4038 WLAN_REASON_DEAUTH_LEAVING,
4039 false, frame_buf);
4040 if (ifmgd->assoc_data)
4041 ieee80211_destroy_assoc_data(sdata, false, true);
4042 if (ifmgd->auth_data)
4043 ieee80211_destroy_auth_data(sdata, false);
4044 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4045 IEEE80211_DEAUTH_FRAME_LEN);
4046 }
4047
4048 /* This is a bit of a hack - we should find a better and more generic
4049 * solution to this. Normally when suspending, cfg80211 will in fact
4050 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4051 * auth (not so important) or assoc (this is the problem) process.
4052 *
4053 * As a consequence, it can happen that we are in the process of both
4054 * associating and suspending, and receive an association response
4055 * after cfg80211 has checked if it needs to disconnect, but before
4056 * we actually set the flag to drop incoming frames. This will then
4057 * cause the workqueue flush to process the association response in
4058 * the suspend, resulting in a successful association just before it
4059 * tries to remove the interface from the driver, which now though
4060 * has a channel context assigned ... this results in issues.
4061 *
4062 * To work around this (for now) simply deauth here again if we're
4063 * now connected.
4064 */
4065 if (ifmgd->associated && !sdata->local->wowlan) {
4066 u8 bssid[ETH_ALEN];
4067 struct cfg80211_deauth_request req = {
4068 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4069 .bssid = bssid,
4070 };
4071
4072 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4073 ieee80211_mgd_deauth(sdata, &req);
4074 }
4075
4076 sdata_unlock(sdata);
4077 }
4078
4079 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4080 {
4081 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4082
4083 sdata_lock(sdata);
4084 if (!ifmgd->associated) {
4085 sdata_unlock(sdata);
4086 return;
4087 }
4088
4089 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4090 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4091 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4092 ieee80211_sta_connection_lost(sdata,
4093 ifmgd->associated->bssid,
4094 WLAN_REASON_UNSPECIFIED,
4095 true);
4096 sdata_unlock(sdata);
4097 return;
4098 }
4099 sdata_unlock(sdata);
4100 }
4101 #endif
4102
4103 /* interface setup */
4104 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4105 {
4106 struct ieee80211_if_managed *ifmgd;
4107
4108 ifmgd = &sdata->u.mgd;
4109 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4110 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4111 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4112 ieee80211_beacon_connection_loss_work);
4113 INIT_WORK(&ifmgd->csa_connection_drop_work,
4114 ieee80211_csa_connection_drop_work);
4115 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4116 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4117 ieee80211_tdls_peer_del_work);
4118 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4119 (unsigned long) sdata);
4120 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4121 (unsigned long) sdata);
4122 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4123 (unsigned long) sdata);
4124 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4125 (unsigned long) sdata);
4126 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4127 ieee80211_sta_handle_tspec_ac_params_wk);
4128
4129 ifmgd->flags = 0;
4130 ifmgd->powersave = sdata->wdev.ps;
4131 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4132 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4133 ifmgd->p2p_noa_index = -1;
4134
4135 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4136 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4137 else
4138 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4139
4140 /* Setup TDLS data */
4141 spin_lock_init(&ifmgd->teardown_lock);
4142 ifmgd->teardown_skb = NULL;
4143 ifmgd->orig_teardown_skb = NULL;
4144 }
4145
4146 /* scan finished notification */
4147 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4148 {
4149 struct ieee80211_sub_if_data *sdata;
4150
4151 /* Restart STA timers */
4152 rcu_read_lock();
4153 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4154 if (ieee80211_sdata_running(sdata))
4155 ieee80211_restart_sta_timer(sdata);
4156 }
4157 rcu_read_unlock();
4158 }
4159
4160 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4161 struct cfg80211_bss *cbss)
4162 {
4163 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4164 const u8 *ht_cap_ie, *vht_cap_ie;
4165 const struct ieee80211_ht_cap *ht_cap;
4166 const struct ieee80211_vht_cap *vht_cap;
4167 u8 chains = 1;
4168
4169 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4170 return chains;
4171
4172 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4173 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4174 ht_cap = (void *)(ht_cap_ie + 2);
4175 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4176 /*
4177 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4178 * "Tx Unequal Modulation Supported" fields.
4179 */
4180 }
4181
4182 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4183 return chains;
4184
4185 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4186 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4187 u8 nss;
4188 u16 tx_mcs_map;
4189
4190 vht_cap = (void *)(vht_cap_ie + 2);
4191 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4192 for (nss = 8; nss > 0; nss--) {
4193 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4194 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4195 break;
4196 }
4197 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4198 chains = max(chains, nss);
4199 }
4200
4201 return chains;
4202 }
4203
4204 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4205 struct cfg80211_bss *cbss)
4206 {
4207 struct ieee80211_local *local = sdata->local;
4208 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4209 const struct ieee80211_ht_cap *ht_cap = NULL;
4210 const struct ieee80211_ht_operation *ht_oper = NULL;
4211 const struct ieee80211_vht_operation *vht_oper = NULL;
4212 struct ieee80211_supported_band *sband;
4213 struct cfg80211_chan_def chandef;
4214 int ret;
4215 u32 i;
4216 bool have_80mhz;
4217
4218 sband = local->hw.wiphy->bands[cbss->channel->band];
4219
4220 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4221 IEEE80211_STA_DISABLE_80P80MHZ |
4222 IEEE80211_STA_DISABLE_160MHZ);
4223
4224 rcu_read_lock();
4225
4226 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4227 sband->ht_cap.ht_supported) {
4228 const u8 *ht_oper_ie, *ht_cap_ie;
4229
4230 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4231 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4232 ht_oper = (void *)(ht_oper_ie + 2);
4233
4234 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4235 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4236 ht_cap = (void *)(ht_cap_ie + 2);
4237
4238 if (!ht_cap) {
4239 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4240 ht_oper = NULL;
4241 }
4242 }
4243
4244 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4245 sband->vht_cap.vht_supported) {
4246 const u8 *vht_oper_ie, *vht_cap;
4247
4248 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4249 WLAN_EID_VHT_OPERATION);
4250 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4251 vht_oper = (void *)(vht_oper_ie + 2);
4252 if (vht_oper && !ht_oper) {
4253 vht_oper = NULL;
4254 sdata_info(sdata,
4255 "AP advertised VHT without HT, disabling both\n");
4256 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4257 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4258 }
4259
4260 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4261 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4262 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4263 vht_oper = NULL;
4264 }
4265 }
4266
4267 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4268 have_80mhz = false;
4269 for (i = 0; i < sband->n_channels; i++) {
4270 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4271 IEEE80211_CHAN_NO_80MHZ))
4272 continue;
4273
4274 have_80mhz = true;
4275 break;
4276 }
4277
4278 if (!have_80mhz)
4279 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4280
4281 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4282 cbss->channel,
4283 ht_cap, ht_oper, vht_oper,
4284 &chandef, false);
4285
4286 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4287 local->rx_chains);
4288
4289 rcu_read_unlock();
4290
4291 /* will change later if needed */
4292 sdata->smps_mode = IEEE80211_SMPS_OFF;
4293
4294 mutex_lock(&local->mtx);
4295 /*
4296 * If this fails (possibly due to channel context sharing
4297 * on incompatible channels, e.g. 80+80 and 160 sharing the
4298 * same control channel) try to use a smaller bandwidth.
4299 */
4300 ret = ieee80211_vif_use_channel(sdata, &chandef,
4301 IEEE80211_CHANCTX_SHARED);
4302
4303 /* don't downgrade for 5 and 10 MHz channels, though. */
4304 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4305 chandef.width == NL80211_CHAN_WIDTH_10)
4306 goto out;
4307
4308 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4309 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4310 ret = ieee80211_vif_use_channel(sdata, &chandef,
4311 IEEE80211_CHANCTX_SHARED);
4312 }
4313 out:
4314 mutex_unlock(&local->mtx);
4315 return ret;
4316 }
4317
4318 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4319 struct cfg80211_bss *cbss, bool assoc,
4320 bool override)
4321 {
4322 struct ieee80211_local *local = sdata->local;
4323 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4324 struct ieee80211_bss *bss = (void *)cbss->priv;
4325 struct sta_info *new_sta = NULL;
4326 struct ieee80211_supported_band *sband;
4327 bool have_sta = false;
4328 int err;
4329
4330 sband = local->hw.wiphy->bands[cbss->channel->band];
4331
4332 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4333 return -EINVAL;
4334
4335 /* If a reconfig is happening, bail out */
4336 if (local->in_reconfig)
4337 return -EBUSY;
4338
4339 if (assoc) {
4340 rcu_read_lock();
4341 have_sta = sta_info_get(sdata, cbss->bssid);
4342 rcu_read_unlock();
4343 }
4344
4345 if (!have_sta) {
4346 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4347 if (!new_sta)
4348 return -ENOMEM;
4349 }
4350
4351 if (new_sta || override) {
4352 err = ieee80211_prep_channel(sdata, cbss);
4353 if (err) {
4354 if (new_sta)
4355 sta_info_free(local, new_sta);
4356 return -EINVAL;
4357 }
4358 }
4359
4360 if (new_sta) {
4361 u32 rates = 0, basic_rates = 0;
4362 bool have_higher_than_11mbit;
4363 int min_rate = INT_MAX, min_rate_index = -1;
4364 struct ieee80211_chanctx_conf *chanctx_conf;
4365 const struct cfg80211_bss_ies *ies;
4366 int shift = ieee80211_vif_get_shift(&sdata->vif);
4367 u32 rate_flags;
4368
4369 rcu_read_lock();
4370 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4371 if (WARN_ON(!chanctx_conf)) {
4372 rcu_read_unlock();
4373 sta_info_free(local, new_sta);
4374 return -EINVAL;
4375 }
4376 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4377 rcu_read_unlock();
4378
4379 ieee80211_get_rates(sband, bss->supp_rates,
4380 bss->supp_rates_len,
4381 &rates, &basic_rates,
4382 &have_higher_than_11mbit,
4383 &min_rate, &min_rate_index,
4384 shift, rate_flags);
4385
4386 /*
4387 * This used to be a workaround for basic rates missing
4388 * in the association response frame. Now that we no
4389 * longer use the basic rates from there, it probably
4390 * doesn't happen any more, but keep the workaround so
4391 * in case some *other* APs are buggy in different ways
4392 * we can connect -- with a warning.
4393 */
4394 if (!basic_rates && min_rate_index >= 0) {
4395 sdata_info(sdata,
4396 "No basic rates, using min rate instead\n");
4397 basic_rates = BIT(min_rate_index);
4398 }
4399
4400 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4401 sdata->vif.bss_conf.basic_rates = basic_rates;
4402
4403 /* cf. IEEE 802.11 9.2.12 */
4404 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4405 have_higher_than_11mbit)
4406 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4407 else
4408 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4409
4410 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4411
4412 /* set timing information */
4413 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4414 rcu_read_lock();
4415 ies = rcu_dereference(cbss->beacon_ies);
4416 if (ies) {
4417 const u8 *tim_ie;
4418
4419 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4420 sdata->vif.bss_conf.sync_device_ts =
4421 bss->device_ts_beacon;
4422 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4423 ies->data, ies->len);
4424 if (tim_ie && tim_ie[1] >= 2)
4425 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4426 else
4427 sdata->vif.bss_conf.sync_dtim_count = 0;
4428 } else if (!ieee80211_hw_check(&sdata->local->hw,
4429 TIMING_BEACON_ONLY)) {
4430 ies = rcu_dereference(cbss->proberesp_ies);
4431 /* must be non-NULL since beacon IEs were NULL */
4432 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4433 sdata->vif.bss_conf.sync_device_ts =
4434 bss->device_ts_presp;
4435 sdata->vif.bss_conf.sync_dtim_count = 0;
4436 } else {
4437 sdata->vif.bss_conf.sync_tsf = 0;
4438 sdata->vif.bss_conf.sync_device_ts = 0;
4439 sdata->vif.bss_conf.sync_dtim_count = 0;
4440 }
4441 rcu_read_unlock();
4442
4443 /* tell driver about BSSID, basic rates and timing */
4444 ieee80211_bss_info_change_notify(sdata,
4445 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4446 BSS_CHANGED_BEACON_INT);
4447
4448 if (assoc)
4449 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4450
4451 err = sta_info_insert(new_sta);
4452 new_sta = NULL;
4453 if (err) {
4454 sdata_info(sdata,
4455 "failed to insert STA entry for the AP (error %d)\n",
4456 err);
4457 return err;
4458 }
4459 } else
4460 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4461
4462 /* Cancel scan to ensure that nothing interferes with connection */
4463 if (local->scanning)
4464 ieee80211_scan_cancel(local);
4465
4466 return 0;
4467 }
4468
4469 /* config hooks */
4470 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4471 struct cfg80211_auth_request *req)
4472 {
4473 struct ieee80211_local *local = sdata->local;
4474 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4475 struct ieee80211_mgd_auth_data *auth_data;
4476 u16 auth_alg;
4477 int err;
4478
4479 /* prepare auth data structure */
4480
4481 switch (req->auth_type) {
4482 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4483 auth_alg = WLAN_AUTH_OPEN;
4484 break;
4485 case NL80211_AUTHTYPE_SHARED_KEY:
4486 if (IS_ERR(local->wep_tx_tfm))
4487 return -EOPNOTSUPP;
4488 auth_alg = WLAN_AUTH_SHARED_KEY;
4489 break;
4490 case NL80211_AUTHTYPE_FT:
4491 auth_alg = WLAN_AUTH_FT;
4492 break;
4493 case NL80211_AUTHTYPE_NETWORK_EAP:
4494 auth_alg = WLAN_AUTH_LEAP;
4495 break;
4496 case NL80211_AUTHTYPE_SAE:
4497 auth_alg = WLAN_AUTH_SAE;
4498 break;
4499 default:
4500 return -EOPNOTSUPP;
4501 }
4502
4503 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4504 req->ie_len, GFP_KERNEL);
4505 if (!auth_data)
4506 return -ENOMEM;
4507
4508 auth_data->bss = req->bss;
4509
4510 if (req->sae_data_len >= 4) {
4511 __le16 *pos = (__le16 *) req->sae_data;
4512 auth_data->sae_trans = le16_to_cpu(pos[0]);
4513 auth_data->sae_status = le16_to_cpu(pos[1]);
4514 memcpy(auth_data->data, req->sae_data + 4,
4515 req->sae_data_len - 4);
4516 auth_data->data_len += req->sae_data_len - 4;
4517 }
4518
4519 if (req->ie && req->ie_len) {
4520 memcpy(&auth_data->data[auth_data->data_len],
4521 req->ie, req->ie_len);
4522 auth_data->data_len += req->ie_len;
4523 }
4524
4525 if (req->key && req->key_len) {
4526 auth_data->key_len = req->key_len;
4527 auth_data->key_idx = req->key_idx;
4528 memcpy(auth_data->key, req->key, req->key_len);
4529 }
4530
4531 auth_data->algorithm = auth_alg;
4532
4533 /* try to authenticate/probe */
4534
4535 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4536 ifmgd->assoc_data) {
4537 err = -EBUSY;
4538 goto err_free;
4539 }
4540
4541 if (ifmgd->auth_data)
4542 ieee80211_destroy_auth_data(sdata, false);
4543
4544 /* prep auth_data so we don't go into idle on disassoc */
4545 ifmgd->auth_data = auth_data;
4546
4547 if (ifmgd->associated) {
4548 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4549
4550 sdata_info(sdata,
4551 "disconnect from AP %pM for new auth to %pM\n",
4552 ifmgd->associated->bssid, req->bss->bssid);
4553 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4554 WLAN_REASON_UNSPECIFIED,
4555 false, frame_buf);
4556
4557 ieee80211_report_disconnect(sdata, frame_buf,
4558 sizeof(frame_buf), true,
4559 WLAN_REASON_UNSPECIFIED);
4560 }
4561
4562 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4563
4564 err = ieee80211_prep_connection(sdata, req->bss, false, false);
4565 if (err)
4566 goto err_clear;
4567
4568 err = ieee80211_auth(sdata);
4569 if (err) {
4570 sta_info_destroy_addr(sdata, req->bss->bssid);
4571 goto err_clear;
4572 }
4573
4574 /* hold our own reference */
4575 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4576 return 0;
4577
4578 err_clear:
4579 eth_zero_addr(ifmgd->bssid);
4580 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4581 ifmgd->auth_data = NULL;
4582 mutex_lock(&sdata->local->mtx);
4583 ieee80211_vif_release_channel(sdata);
4584 mutex_unlock(&sdata->local->mtx);
4585 err_free:
4586 kfree(auth_data);
4587 return err;
4588 }
4589
4590 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4591 struct cfg80211_assoc_request *req)
4592 {
4593 struct ieee80211_local *local = sdata->local;
4594 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4595 struct ieee80211_bss *bss = (void *)req->bss->priv;
4596 struct ieee80211_mgd_assoc_data *assoc_data;
4597 const struct cfg80211_bss_ies *beacon_ies;
4598 struct ieee80211_supported_band *sband;
4599 const u8 *ssidie, *ht_ie, *vht_ie;
4600 int i, err;
4601 bool override = false;
4602
4603 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4604 if (!assoc_data)
4605 return -ENOMEM;
4606
4607 rcu_read_lock();
4608 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4609 if (!ssidie) {
4610 rcu_read_unlock();
4611 kfree(assoc_data);
4612 return -EINVAL;
4613 }
4614 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4615 assoc_data->ssid_len = ssidie[1];
4616 rcu_read_unlock();
4617
4618 if (ifmgd->associated) {
4619 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4620
4621 sdata_info(sdata,
4622 "disconnect from AP %pM for new assoc to %pM\n",
4623 ifmgd->associated->bssid, req->bss->bssid);
4624 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4625 WLAN_REASON_UNSPECIFIED,
4626 false, frame_buf);
4627
4628 ieee80211_report_disconnect(sdata, frame_buf,
4629 sizeof(frame_buf), true,
4630 WLAN_REASON_UNSPECIFIED);
4631 }
4632
4633 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4634 err = -EBUSY;
4635 goto err_free;
4636 }
4637
4638 if (ifmgd->assoc_data) {
4639 err = -EBUSY;
4640 goto err_free;
4641 }
4642
4643 if (ifmgd->auth_data) {
4644 bool match;
4645
4646 /* keep sta info, bssid if matching */
4647 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4648 ieee80211_destroy_auth_data(sdata, match);
4649 }
4650
4651 /* prepare assoc data */
4652
4653 ifmgd->beacon_crc_valid = false;
4654
4655 assoc_data->wmm = bss->wmm_used &&
4656 (local->hw.queues >= IEEE80211_NUM_ACS);
4657
4658 /*
4659 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4660 * We still associate in non-HT mode (11a/b/g) if any one of these
4661 * ciphers is configured as pairwise.
4662 * We can set this to true for non-11n hardware, that'll be checked
4663 * separately along with the peer capabilities.
4664 */
4665 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4666 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4667 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4668 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4669 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4670 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4671 netdev_info(sdata->dev,
4672 "disabling HT/VHT due to WEP/TKIP use\n");
4673 }
4674 }
4675
4676 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4677 sband = local->hw.wiphy->bands[req->bss->channel->band];
4678 if (!sband->ht_cap.ht_supported ||
4679 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4680 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4681 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4682 if (!bss->wmm_used &&
4683 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4684 netdev_info(sdata->dev,
4685 "disabling HT as WMM/QoS is not supported by the AP\n");
4686 }
4687
4688 /* disable VHT if we don't support it or the AP doesn't use WMM */
4689 if (!sband->vht_cap.vht_supported ||
4690 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4691 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4692 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4693 if (!bss->wmm_used &&
4694 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4695 netdev_info(sdata->dev,
4696 "disabling VHT as WMM/QoS is not supported by the AP\n");
4697 }
4698
4699 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4700 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4701 sizeof(ifmgd->ht_capa_mask));
4702
4703 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4704 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4705 sizeof(ifmgd->vht_capa_mask));
4706
4707 if (req->ie && req->ie_len) {
4708 memcpy(assoc_data->ie, req->ie, req->ie_len);
4709 assoc_data->ie_len = req->ie_len;
4710 }
4711
4712 assoc_data->bss = req->bss;
4713
4714 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4715 if (ifmgd->powersave)
4716 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4717 else
4718 sdata->smps_mode = IEEE80211_SMPS_OFF;
4719 } else
4720 sdata->smps_mode = ifmgd->req_smps;
4721
4722 assoc_data->capability = req->bss->capability;
4723 assoc_data->supp_rates = bss->supp_rates;
4724 assoc_data->supp_rates_len = bss->supp_rates_len;
4725
4726 rcu_read_lock();
4727 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4728 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4729 assoc_data->ap_ht_param =
4730 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4731 else
4732 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4733 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4734 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4735 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4736 sizeof(struct ieee80211_vht_cap));
4737 else
4738 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4739 rcu_read_unlock();
4740
4741 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4742 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4743 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4744 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4745
4746 if (bss->wmm_used && bss->uapsd_supported &&
4747 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4748 assoc_data->uapsd = true;
4749 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4750 } else {
4751 assoc_data->uapsd = false;
4752 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4753 }
4754
4755 if (req->prev_bssid)
4756 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4757
4758 if (req->use_mfp) {
4759 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4760 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4761 } else {
4762 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4763 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4764 }
4765
4766 if (req->flags & ASSOC_REQ_USE_RRM)
4767 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4768 else
4769 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4770
4771 if (req->crypto.control_port)
4772 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4773 else
4774 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4775
4776 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4777 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4778 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4779 sdata->vif.type);
4780
4781 /* kick off associate process */
4782
4783 ifmgd->assoc_data = assoc_data;
4784 ifmgd->dtim_period = 0;
4785 ifmgd->have_beacon = false;
4786
4787 /* override HT/VHT configuration only if the AP and we support it */
4788 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4789 struct ieee80211_sta_ht_cap sta_ht_cap;
4790
4791 if (req->flags & ASSOC_REQ_DISABLE_HT)
4792 override = true;
4793
4794 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4795 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4796
4797 /* check for 40 MHz disable override */
4798 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4799 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4800 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4801 override = true;
4802
4803 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4804 req->flags & ASSOC_REQ_DISABLE_VHT)
4805 override = true;
4806 }
4807
4808 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4809 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4810 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4811 }
4812
4813 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4814 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4815
4816 err = ieee80211_prep_connection(sdata, req->bss, true, override);
4817 if (err)
4818 goto err_clear;
4819
4820 rcu_read_lock();
4821 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4822
4823 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4824 !beacon_ies) {
4825 /*
4826 * Wait up to one beacon interval ...
4827 * should this be more if we miss one?
4828 */
4829 sdata_info(sdata, "waiting for beacon from %pM\n",
4830 ifmgd->bssid);
4831 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4832 assoc_data->timeout_started = true;
4833 assoc_data->need_beacon = true;
4834 } else if (beacon_ies) {
4835 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4836 beacon_ies->data,
4837 beacon_ies->len);
4838 u8 dtim_count = 0;
4839
4840 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4841 const struct ieee80211_tim_ie *tim;
4842 tim = (void *)(tim_ie + 2);
4843 ifmgd->dtim_period = tim->dtim_period;
4844 dtim_count = tim->dtim_count;
4845 }
4846 ifmgd->have_beacon = true;
4847 assoc_data->timeout = jiffies;
4848 assoc_data->timeout_started = true;
4849
4850 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4851 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4852 sdata->vif.bss_conf.sync_device_ts =
4853 bss->device_ts_beacon;
4854 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4855 }
4856 } else {
4857 assoc_data->timeout = jiffies;
4858 assoc_data->timeout_started = true;
4859 }
4860 rcu_read_unlock();
4861
4862 run_again(sdata, assoc_data->timeout);
4863
4864 if (bss->corrupt_data) {
4865 char *corrupt_type = "data";
4866 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4867 if (bss->corrupt_data &
4868 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4869 corrupt_type = "beacon and probe response";
4870 else
4871 corrupt_type = "beacon";
4872 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4873 corrupt_type = "probe response";
4874 sdata_info(sdata, "associating with AP with corrupt %s\n",
4875 corrupt_type);
4876 }
4877
4878 return 0;
4879 err_clear:
4880 eth_zero_addr(ifmgd->bssid);
4881 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4882 ifmgd->assoc_data = NULL;
4883 err_free:
4884 kfree(assoc_data);
4885 return err;
4886 }
4887
4888 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4889 struct cfg80211_deauth_request *req)
4890 {
4891 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4892 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4893 bool tx = !req->local_state_change;
4894
4895 if (ifmgd->auth_data &&
4896 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4897 sdata_info(sdata,
4898 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4899 req->bssid, req->reason_code,
4900 ieee80211_get_reason_code_string(req->reason_code));
4901
4902 drv_mgd_prepare_tx(sdata->local, sdata);
4903 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4904 IEEE80211_STYPE_DEAUTH,
4905 req->reason_code, tx,
4906 frame_buf);
4907 ieee80211_destroy_auth_data(sdata, false);
4908 ieee80211_report_disconnect(sdata, frame_buf,
4909 sizeof(frame_buf), true,
4910 req->reason_code);
4911
4912 return 0;
4913 }
4914
4915 if (ifmgd->assoc_data &&
4916 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4917 sdata_info(sdata,
4918 "aborting association with %pM by local choice (Reason: %u=%s)\n",
4919 req->bssid, req->reason_code,
4920 ieee80211_get_reason_code_string(req->reason_code));
4921
4922 drv_mgd_prepare_tx(sdata->local, sdata);
4923 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4924 IEEE80211_STYPE_DEAUTH,
4925 req->reason_code, tx,
4926 frame_buf);
4927 ieee80211_destroy_assoc_data(sdata, false, true);
4928 ieee80211_report_disconnect(sdata, frame_buf,
4929 sizeof(frame_buf), true,
4930 req->reason_code);
4931 return 0;
4932 }
4933
4934 if (ifmgd->associated &&
4935 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4936 sdata_info(sdata,
4937 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4938 req->bssid, req->reason_code,
4939 ieee80211_get_reason_code_string(req->reason_code));
4940
4941 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4942 req->reason_code, tx, frame_buf);
4943 ieee80211_report_disconnect(sdata, frame_buf,
4944 sizeof(frame_buf), true,
4945 req->reason_code);
4946 return 0;
4947 }
4948
4949 return -ENOTCONN;
4950 }
4951
4952 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4953 struct cfg80211_disassoc_request *req)
4954 {
4955 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4956 u8 bssid[ETH_ALEN];
4957 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4958
4959 /*
4960 * cfg80211 should catch this ... but it's racy since
4961 * we can receive a disassoc frame, process it, hand it
4962 * to cfg80211 while that's in a locked section already
4963 * trying to tell us that the user wants to disconnect.
4964 */
4965 if (ifmgd->associated != req->bss)
4966 return -ENOLINK;
4967
4968 sdata_info(sdata,
4969 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4970 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4971
4972 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4973 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4974 req->reason_code, !req->local_state_change,
4975 frame_buf);
4976
4977 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4978 req->reason_code);
4979
4980 return 0;
4981 }
4982
4983 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4984 {
4985 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4986
4987 /*
4988 * Make sure some work items will not run after this,
4989 * they will not do anything but might not have been
4990 * cancelled when disconnecting.
4991 */
4992 cancel_work_sync(&ifmgd->monitor_work);
4993 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4994 cancel_work_sync(&ifmgd->request_smps_work);
4995 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4996 cancel_work_sync(&ifmgd->chswitch_work);
4997 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
4998
4999 sdata_lock(sdata);
5000 if (ifmgd->assoc_data) {
5001 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5002 ieee80211_destroy_assoc_data(sdata, false, false);
5003 cfg80211_assoc_timeout(sdata->dev, bss);
5004 }
5005 if (ifmgd->auth_data)
5006 ieee80211_destroy_auth_data(sdata, false);
5007 spin_lock_bh(&ifmgd->teardown_lock);
5008 if (ifmgd->teardown_skb) {
5009 kfree_skb(ifmgd->teardown_skb);
5010 ifmgd->teardown_skb = NULL;
5011 ifmgd->orig_teardown_skb = NULL;
5012 }
5013 spin_unlock_bh(&ifmgd->teardown_lock);
5014 del_timer_sync(&ifmgd->timer);
5015 sdata_unlock(sdata);
5016 }
5017
5018 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5019 enum nl80211_cqm_rssi_threshold_event rssi_event,
5020 gfp_t gfp)
5021 {
5022 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5023
5024 trace_api_cqm_rssi_notify(sdata, rssi_event);
5025
5026 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5027 }
5028 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5029
5030 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5031 {
5032 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5033
5034 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5035
5036 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5037 }
5038 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
Linux with added FPC-III support